Hollow drill bit is made of what material

Hollow drill bit is made of what material? Imports of steel drill bit, drill the rail where to buy? Hollow drill bit is what material do? Hollow drill we have used, you know what material the hollow drill bit to do it? Its name suggests is no hollow drill drill drill core, typically used for processing some of the large-diameter hole through the workpiece or precious metals, with high efficiency, accuracy good results. Hollow drill called core drill, magnetic drill, magnetic drill bits, hole saw drill bit used hollow shank type: straight handle, universal handle, Nitto abrasive grinding wheels  handle, handle drill overtone Category: HSS drill bits, carbide drill tungsten steel drill bit; cutting of depth: 35MM, 50MM or 100mm Specifications: 12MM to 100MM; drill main materials are high-speed steel; powder metallurgy; Carbide category. Suitable Motor: magnetic drill / magnetic drill / drill / lathe / milling machine, type, complete specifications, applicable to imports of various brands of diamond magnet (magnetic drill) and general drilling, milling, boring, etc.
The products and supporting the use of tct circular saw blades  imported magnetic drill, drilling efficiency is 8 to 10 times the normal drill. Hollow drill steel can be precision, high speed perforation can also play overlapping holes 三枚 combination blade edge portion of the structure of some of the hollow drill bit used, each blade in the cutting process, the burden of the workload only about 1/3 of , plus the inside of each blade are also cutting knife. So you can make the chip very smooth, but also extremely difficult to produce chipping. Recommended reading: What is the role of drill core and features
Hollow drill and twist drill compare people to use as a cutting tool twist drill has been a hundred years of history. Since the twist drill head core portion is completely negative cutting angle, the cutting resistance is large, so the twist drill cutting force is 50% to 60% of carbide drill bits  the core caused because of the drill bit. Coupled with the factors of steel, so can not do much twist drill. Some of the larger deeper hole machining must start from the drill hole to expand step by step until the reamer size to meet the requirements so far.
The advent of the expanded hollow drill bit cutting range, using relatively small power can be processed macroporous deep.

Carbide saw blade manufacturers tell your maintenance methods and requirements

Saw-cut steel composite panels, rock wool sandwich panel saw, cutting copper blade, cutting blade iron, aluminum cutting saw, woodworking saw blades, PCD saw blades, precision panel saw blade, multi-saw Saw, Saw exclusive diamond quartz material, non-porous ceramic stone dedicated diamond saw blades, diamond saw marble, granite diamond saw.
Blade maintenance methods: 1 blade if ceramic tile saw  not used immediately, it should be flat or use the hole to hang it up, can not be stacked on other items or foot flat blade, and pay attention to moisture, corrosion .
(2) When the blade is no longer sharp cutting surface roughness, it must promptly re-grinding. Grinding can not change the original angle, and destruction balancing.
3 inner diameter of the blade correction, the positioning hole machining, etc., must be performed by the manufacturer. If the process is bad, will affect the product effect, and potentially dangerous, reaming should not be over the original aperture 20mm, so as not to affect the balance of the blade stress requirements: (1) when the work piece should  sanding disc for drill be fixed to ensure the profile positioning comply with the direction of the knife to eat to avoid abnormal cut, or not to apply lateral pressure curve cutting, smooth feed to avoid the impact of the blade contacts the workpiece, resulting in blade breakage, or workpiece flying out of an accident. 2, work and found abnormal sound and vibration, cutting surface roughness, or odor, you must immediately terminate operations, timely inspection, troubleshooting to avoid accidents. 3, at the start and stop cutting cutting, do not feed too fast to avoid broken teeth and damaged. 4, if the cutting aluminum or other dry cut blades  metal, to use a dedicated coolant to prevent the blade from overheating, resulting in tooth paste, and other damage, affecting the cutting quality.
5, flutes and suction equipment to ensure smooth flow of slag device to prevent slag accumulation into blocks, affecting production and safety.
6, when dry cutting, do not cut long hours, so as not to affect the life of the blade and the cutting effect; wet sheet cutting, water jet cutting should be added, to guard against leakage.

How to choose a good quality core drill

How to choose a good quality core drill ? Used magnetic drill drilling engineers may have distinct magnetic drill drilling speed really is not an ordinary hand drill comparison . Good times but the price is hollow drill twist drill head . So buy the right track to good hollow drill manufacturers consumption is very important. So what kind of Concrete saw blades  hollow drill core drill is considered good ? How to choose a good quality core drill ?
I have talked to many customers about this topic. The answer generally have few , there is a trust -based client that is collaborative and after some suppliers will have great confidence in the products are supplied to provide a good product . We will also improve our quality selection system for customers good quality first hurdle ; Some customers are advocating brand type , or some kind of a common brand name products compared to agree , so the time of purchase , know or direct purchase of a certain category diamond blade saws  of branded products, other brands of products to try ordinary little or rarely use . Such customers rarely have the opportunity general more suitable to my contacts , products are often cut in , it may be said that many customers will be repeated after it was selected choice of a particular brand of product , and continue to have a good use after the course Some big brand products are indeed the passing rate on the quality control and quality management is 4 inch saw blades  very strict, so there is little "winning " situation attack. Another type of customer choice hollow drill bits, to simply learn to pragmatic type , I thought it only appropriate choice , either the price or quality , some brands may know very well , but the quality is not his only reason for choice .

Factors affecting the surface of the polishing sheet cutting

Factors affecting the surface finish using abrasive methods can mold surface smooth, smooth degree with the following factors :
1 , ( there are differences tend to increase the difficulty of the polished steel surface hardness variation or characteristics ) of steel quality.
2 , heat treatment ( heat treatment in many ways affect polishing performance ) .
3 , polishing ( polishing process and polishing supplies a direct impact on the polishing effect ) .
Polishing technique is generally sds hammer drill bits  considered the most important factor , proper polishing , cutting slices using a good polishing supplies , with good quality tool steel and proper heat treatment process to achieve satisfactory finish. Conversely, polishing techniques and supplies used improperly, even with the best quality steel will not reach the height of the mirror effect.
Whetstone is Hashimoto After years of successful experience in product research and development , including GC and CARBON Whetstone Whetstone . This feature is used Whetstone balanced with sand binder regulation strictly control the sintering temperature is substantially zero inclusions practice . This Whetstone is water-soluble with water-soluble so that the liquid Whetstone , Whetstone using surface active agent solution which can reduce the incidence and Whetstone job scratches scratches , and to improve the quality of the calm surface of the mold . GC whetstone for heat treatment ( hardness of 50 degrees or more ) steel ; suitable pre-hardened steel ( hardness 40 degrees ) in the steel.
HASHIMOTO diamond paste
This diamond paste is characterized by  diamond blade circular saw the concentration of diamond particles 3 times higher than other brands , and therefore better reflect the advantages of diamond particles in the dispersion and stability . With the diluent used to make steel mold to achieve the perfect effect finishing . Diamond paste body is constructed from polycrystalline diamond particles together , due to equalization containing fine crystals more acute crystal surface scratches can be reduced and the generation of the clearance hole of the mold surface during the grinding process to achieve efficient operations . The single crystal structure of diamond paste is made ​​from a single crystal , cutting the sheet due to the grinding process acute scarcity crystal plane of the mold surface is likely to cause scratches , while the sand is also prone to the phenomenon of hole .
TIG welding mold technology
TIG welding mold technology is the fastest growing domestic and international , the most widely used welding techniques. In  concrete saws recent years, TIG GTAW in particular , has become a variety of metal structures essential means of welding , so the demand for welding work is also growing . In recent years , mechanization and automation of welding has been greatly improved, and more and more toward controlling factor NC direction, reached a higher stage.

wheel trimmed axial section of a toothed rack

1 disc grinding machine: two twisted dish rack wheel is equivalent to two narrow tooth surface, the workpiece through the rounded plate and strip for the exhibition into activities, tasks Taiwan along the axial direction as to the workpiece his activities to grind the entire tooth width. Each finished grinding a tooth after the dividing head frame after dividing plate of teeth. This tool can also be applied additional turbo diamond blade  installation grinding bevel. If using a grinding wheel into the internal gear, internal gear grinding can. This machine is a horizontal structure of ordinary, when machining diameters greater than 1 m vertical structure with an accuracy of up to four, together for grinding precision gears.
2 conical wheel gear: wheel trimmed axial section of a toothed rack, and a straight line along the tooth to come and activities. Workpiece through the worm gear, screw and communication gear and developed into a complete indexing activities, but also effective rounded plate and strip for developed into activity, the application of worm or indexing plate for indexing activities. Wheel rack rotated by an angle helix angle of the workpiece when grinding helical gear. This machine adjustment convenience, versatility, and fit for single batch production, wider use.
3 worm wheel gear: truth and hobbing similar, large-diameter wheel as a single head worm shape, of a turn each wheel, the  colde saw blade workpiece is rotated one tooth, and its transmission ratio accurately, some with mechanical transmission, some with synchronous motor idea identify drivers, some with raster and servo motor. For grinding the workpiece axially feeding activities in order to grind the entire tooth surface. Diamond tools for grinding wheel turning or rolling roll into worm-shaped. Machine tools for the vertical structure, the continuation of indexing, high grinding efficiency, co-processed for batch production medium modulus gear on gear teeth and more particularly suitable, accuracy up to four.
4 large flat grinding machine: the wheel of a task plane is equivalent to a rack tooth surface, with involute master masonry drill bits  develop into activities occurred. Grinding wheel and the workpiece is not longing for the workpiece axis complex activities, grind the side of the tooth surface after the application of sub-dividing plate teeth (The company specializes in producing aluminum cutting machine), sequentially grind all tooth surfaces. Then turn around the workpiece, and then grind the other side of the tooth surface. Machine is a horizontal structure, simple structure, function the same, accuracy up to 3, first and foremost for grinding shaper cutters, shaving cutters and metering measuring gear.

Select abrasive wet cutting method and cutting pieces

Wet abrasive grinding wheel cutting method commonly used for cutting, according to the material to be cut , it may need to use a grinding wheel with different ingredients. Grinding wheel will be affected by the choice of material hardness and toughness .
Wet Wet abrasive cutting method abrasive grinding wheel cutting method commonly used for cutting, grinding wheel abrasive and adhesive. When cutting , the grinding wheel with coolant flushing to prevent damage to the specimen due to frictional heat . The cooling fluid also remove chips cut area. Select the grinding wheel wheels
According to the material  concrete saws to be cut , you may need to use a grinding wheel with different ingredients. Grinding wheel will be affected by the choice of material hardness and toughness . Split carbide ceramic or diamond bonded materials should be chosen from the phenolic binder made ​​of metal or cutting disc . Using phenolic adhesive bonding of aluminum oxide (Al2O3) grinding wheel is a typical choice of black metal material cutting . Cubic boron nitride (CBN) are increasingly used in higher hardness cutting ferrous materials . Non-ferrous metal cutting should be selected by the phenolic adhesive bonding of silicon carbide (SIC) grinding wheel . Cutting wheel design
Grinding wheel designs should be considered in addition to grains , we must also consider the difference between diamond / CBN cutting disc cutting discs and SiC/Al2O3 between . Due to high hardness and abrasive with a durable adhesive fixed abrasive , diamond cutting wheel CBN / performance is very durable . Metal disc perimeter ( continuous rim ) just stick a thin layer of abrasive. These are long-term consumable cutting wheel cutting disc . SiC and Al2O3, and other abrasive wear relatively fast , relatively inexpensive . Thus, the entire body from abrasive grinding wheel and a binder . This cutting wheel cutting disc is called self- consumption . Characteristics cut pieces
Long-term consumption of cut pieces ceramic tile saw from the cutting long pieces generally consumable diamond cutting discs , diamond cutting discs there are two to choose from , they use different abrasive binders - A cutting pieces of metal adhesives, other kinds of phenolic adhesive is applied . Both can be used for cutting sheet cutting extremely hard materials. Higher metal adhesive applied to the brittle materials such as ceramics. Phenolic binder is capable CBN cutting materials like carbide cutting wheel just Bakelite adhesive types available , suitable for cutting extremely hard white cast iron and other ferrous materials . Consumable consumable cutting disc grinding wheel cutting disc generally , this cutting sheet cutting characteristics  concrete saws with different adhesive properties vary . According adhesive " hardness" or abrasive capacity retention or discarding divided into different categories . Abrasive ability to maintain " rigid " grinding wheel is better than " soft " grinding wheel . " Soft " grinding wheel for cutting hard , brittle materials , because this grinding wheel will break down with the lower hardness binders , continue to add new , sharp abrasive . When cutting soft and ductile materials , adhesives should choose a higher hardness grinding wheel . Further , the higher the hardness of the adhesive wear of the cutting wheel is slower , and therefore more economical. Select the correct cut for the particular sheet material is very important. Only the correct cutting disc to ensure that small amount of deformation , smooth surface . After cutting the higher surface quality , the speed required for the preparation of the results obtained faster .

vitrified diamond wheel diamond and ceramic binder with common characteristics

Diamond grinding wheel is grinding carbide, glass, ceramics, precious stones high brittle materials effects tools. In recent years, with high-speed grinding ultra-precision grinding technology developed rapidly, put a higher demand on the grinding wheel, ceramic resin bonded grinding wheel has been unable to meet production needs, because of its combination  dry core drill bits of metal bonded grinding wheel, high strength, good formability, long life and other significant characteristics of the production has been widely used. Metal bond diamond wheel manufacturers in different ways according to a major sintering, plating two types. In order to give full play to the role of super abrasive abroad from the 20th century, the early 90s with a high temperature brazing process to develop a new wheel, ie high temperature brazing monolayer superabrasive grinding wheels, this wheel is still in the current domestic research and development stage.
Ceramic diamond wheel vitrified diamond grinding wheel with diamond and vitrified common characteristics, and general corundum, silicon carbide grinding wheel compared to its grinding force, grinding temperature is relatively low, the wheel wear is relatively small; can be adapted diamond cup wheels  to each species coolant effect; grinding wheel is good shape retention, high precision grind the workpiece; wheel has more pores, grinding and heat conducive chip, clogging, easy to burn the workpiece; wheel good self-sharpening, finishing a long time interval, trimming easier. Therefore, vitrified diamond grinding wheel used in some foreign countries is increasing.
Sintered diamond wheel
Sintered metal-bonded grinding wheels mostly bronze and other metals as a binder, with the manufacture of high-temperature sintering method, which combines high strength, good formability, high abrasive grinding wheels  temperature, thermal conductivity, good wear resistance, long life, can withstand greater loads.
Electroplated diamond grinding wheel:
① plating process is simple, less investment, ease of manufacture;
② without dressing, easy to use;
③ monolayer structure determines it can reach very high operating speed, the current foreign countries have been as high as 250 ~ 300m / s;
④ Although only a single layer of diamond, but there is still enough life;
⑤ For high accuracy, roller wheels, electroplated unique manufacturing method. Precisely because of these advantages, plating wheel speed, ultra-high speed grinding occupy undisputed dominance.

diamond abrasive and filler

Diamond grinding wheel used more widely, mainly for grinding or cutting, then you know how to process diamond wheel is made of it? Here we introduce a simple method for processing diamond wheel:
Prior and diamond abrasive fillers, these fillers can be salts, glass beads or magnetic particles. After core bits for concrete  bonding, 20% the thickness of the filler particles are bonded by a metal binding agent, these fillers were used in addition to the following methods: dissolution method, sublimation method or magnetic method. This method of diamond abrasive filler particle size and particle size roughly the same amount of filler to make the diamond abrasive work surface to achieve the required concentration. The disadvantage of these methods is complicated in addition to the filler, require special set of methods.
In addition to the filler is a relatively simple method using the spherical filler particles, the surface is smooth, a metal binding agent is first deposited diamond abrasive grains having a  granite polishing pads thickness of 20% of the height, and the filler brush with a brush, and finally continue the metal binding agent is deposited to predetermined thickness, use of this method to different metal bonded surface roughness and shape of the particles of different capacities of the gripping effect, the drawback is that the diamond abrasive particle size of the filler particle size rather, after bonding and thus in the same plane, with the mechanical In addition to the packing method, there may give some diamond abrasive brush together, especially those close to equal area like shape of the particles, smooth surface of the particles.

Coated blade excellent overall performance

Blade coating excellent performance
As structural parts wear, corrosion, oxidation and fatigue crack initiation and other damage processes are
Starting from the surface of the  wet tile saw member , the member is so attached to the surface layer of high strength, wear ,
And corrosion, anti-oxidation coatings , can inhibit or slow the occurrence of the failure process ,
Achieve the protective purpose ; achieve the protective purpose ; while still a member of the core part toughness , can
Enough to satisfy the members on the stiffness requirements, give full play to their respective coating and substrate member
Excellent performance , so that the dry cut blades  member received excellent overall performance. In addition, also the root
According to requirements, to attach some of the surface of the member having excellent physical properties of the coating channel , such as thermal
, Sealing , excellent conductive coatings , satisfaction and improve the physical properties of the member to be
Requirements. To take full advantage of CNC machine tool performance , high efficiency machining the workpiece , so used CNC machine tools, carbide cutting tools should be adopted and ceramics , PCD / CVD / PCBN cutting tools. With the advancement of science and technology , should be changed in the past that the bending strength low alloy views . Some modern flexural strength than carbide HSS has been used to produce solid carbide center drill, tap, small-diameter boring knives, reamers, end mills, 0.1 or more holes , drill , composite drill hole cutter , small diameter 40mm dovetail groove and the T- slot cutters , etc., had domestic production , the use of colde saw blade  performance compared with other countries , the price is a fraction of the imports .
1 ) resin bond diamond grinding wheel bond strength is weak , it can be self-sharpening, grinding , and not blocked, high grinding efficiency , small grinding force , low grinding temperature , the disadvantage is poor wear resistance , abrasive wear and tear , it is not suitable for heavy duty grinding . 2 ) vitrified diamond grinding wheel wear resistance and superior binding capacity of the resin binder, sharp cutting , grinding , high efficiency, easy to heat and clogging , thermal expansion is less easy to control precision, shortcomings coarse grinding surface , higher costs . 3 ) metal-bonded diamond wheels combined with high strength , wear resistance, low wear , long life, grinding , low cost, can withstand a greater load, but sharp poor, easy to plug .

Particularity blade coating material

Particularity blade coating material
Compared with the bulk material , the coating thickness is thin because it is easy to generate size effect , that cutting discs  the coating thickness of the coating performance will be affected . Second , the coating with the volume ratio of the surface area is large, so the surface effect is significant , surface energy, surface state , surface scattering and surface interference great influence on its performance . In addition , the coating also contains a large number of grain boundaries and surface defect states , electrons have a greater impact during transport . Since the coating is a multi- grown deposited on the substrate , the substrate and the coating so that there is some interaction between such coating and the substrate appears and the adhesion between the adhesion problems , deposition coating layer will appear in the problem of internal stress , these problems are  circular blades of the coating has a significant impact on performance .
Surface effect is obvious surface effect refers to the solid surface , the internal stress in the coating ; coating nano multilayer structure and nanocrystalline composite structure , the coating excellent overall performance: As a structural member of wear, corrosion , oxidation, and fatigue , cracks and other damage initiation process is started from the surface of the member , and therefore attached to the surface layer of the component , high strength, wear resistance , corrosion resistance, anti-oxidation coating , can inhibit or slow down the destruction process , reach protection purposes, and is still the core part component toughness to meet members and other requirements for stiffness , give full play to the coating and the wet saw blades  substrate components excellent performance , thermal conductivity , sealing , excellent electrical conductivity of the coating, to meet and increasing component requirements for properties
Feed speed , depending on the processing of the material properties of each material when the cutting depth must have a certain range of the feed rate , if the speed is too high, will accelerate the wear of diamond or even fall off , causing the blade consumed quickly If the speed is too low , then they will make the process of self-sharpening blades can not be normal , so " blunt , skid " lost cutting capacity . Under normal circumstances , the feed speed is slower when cutting , sawing should be in uniform for the common typical materials , when the cutting depth is 20mm, recommend the following feed rate table for your reference , when the thickness changes, the cutting speed can be press the cutting area (cm2 / min) to conversion . Tip: The first feed or each piece of board should be reduced by half for the first three walks .

Diamond drill rock breaking mechanism

Diamond drill rock breaking role is done by the diamond particles. You

know the drill rock breaking role, it should be aware of a single grain

of diamond rock breaking effect. In hard  carbide grinding wheels formations, single grain

diamond drilling pressure in the rock is under high stress conditions

(approximately 4200-5700MPa, some data suggest that up to 6300MPa), the

rock lithology changes occur from the plastic becomes brittle. Single

grain diamond eat into the formation, under the action of the cutting

torque rock breaking, cutting depth substantially equal to the depth of

the diamond particles to eat. This process as "plowing" so called

diamond drill plow cutting action.
In some brittle rocks in (such as sandstone, limestone, etc.), drill the

diamond particles in the WOB torque while 9 inch saw blade under the influence of broken

rock is much larger than the volume of diamond particles eat into the

rotary volume. When the pressure is not, only the direction of movement

along the diamond formation of small trenches, increased pressure will

cause the small grooves on both sides of the deep rock crushing and over

section size diamond particles.
Diamond drill rock breaking effect, except with the lithology and

external factors affecting lithology diamond tool manufacturer  (such as pressure, temperature,

formation fluid properties, etc.) related, WOB size is an important

factor. It cone bit like when you have a rock breaking the surface

crushing, crushing fatigue, the volume broken in three ways. Only when

the diamond particles have enough to eat than the pressure into the

formation rock, the rock volume occurs when broken, breaking rocks in

order to achieve the desired effect.

The effect of diamond saw blades

Force effects: In the cutting process, the blade subject to axial force

and tangential force. Because there is in the circumferential direction

and the radial force, in the axial direction so  wet granite pads that the blade wavy dish

in radial direction. Both can cause deformation of the rock section is

not flat, stone wasted, sawing noise, vibration intensified, resulting

in diamond caking early damage, reduced blade life.
Temperature effect: the traditional theory: the influence of temperature

on the blade process is mainly manifested in two aspects: First, cause

agglomeration of diamond graphitization; two diamond and matrix is ​​

caused by thermal stress caused by premature loss of diamond particles.

New research showed that: the heat generated during cutting the main

incoming agglomeration. Arc temperature is not high, generally between

40 ~ 120 ℃. The abrasive grinding point temperature was high, generally

between 250 ~ 700 ℃. The coolant only reduce the average temperature of

the arc zone, the temperature has little effect on the grain. This does

not result in graphite carbonization temperature, but will make the

friction between the abrasive particles and the workpiece change in

properties, and to occur between 12 inch saw blade  the diamond and the additive thermal

stress, which led to fundamental changes in the failure mechanism of

diamond. Studies have shown that the temperature effect is to make the

biggest factors blade breakage.
Grinding damage: the force effects and temperature than the response,

after a period of use of the blade tend to produce wear damage. Grinding

damage in the form of mainly the following: abrasive wear, local

crushing, a large area of ​​broken off, binders direction along the

cutting speed of the mechanical abrasions. Abrasive: Diamond particles

and constant friction formula pieces, into a flat edge passivation, loss

cutting, increasing friction. Heat causes the cutting surface of the

diamond particles graphite sheet, the hardness greatly reduced,

increased wear: the surface of the diamond particles exposed to

alternating thermal stresses, and also diamond tool manufacturer  the cutting under alternating

stress, fatigue cracks will be partially broken, revealing a sharp new

edge, is an ideal wear pattern; large area broken: diamond particles in

the Leads to withstand shock loads, the more prominent grain and grain

prematurely consumed; shedding: the diamond cutting force alternating

binding agent particles are constantly being generated shaking loose.

Meanwhile, the cutting process of the binding agent itself wear and

cutting heat to soften the binding agent. This makes the gripping force

decreased binding agent, when the particle is greater than the cutting

force on the gripping force, the diamond particles will fall off. No

matter what kind of wear and tear with the diamond particles to

withstand load and temperature are closely related. Both of which are

determined by sawing process and cooling lubrication conditions.

Carbide saw blade manufacturing companies can not do so many specifications of the saw blade

according to law and according to the current preferred wood processing enterprises in the equipment, materials and  concrete diamond blades other specific factors that make up the specifications currently used carbide saw blade series. This helps us use carbide saw blades, but also conducive alloy blade manufacturing enterprise scale production.
Under normal circumstances, sawing particleboard, medium density board should be selected so teeth, sawing plywood, fire board generally choose Ladder tooth (flat tooth, trapezoidal tooth combination). Depending on polishing pads   the diameter of the blade circular sawing machine model to Ф300-350mm majority, saw blade thickness and diameter. Ф250-300mm thickness 3.2mm, Ф350mm than 3.5mm.
Since computer saws saws honestly rate, with a carbide blade diameter and thickness of the relatively large, about 350-450mm in diameter, thickness 4.0-4.8mm between, the majority of flat construction tools   ladder teeth to reduce chipping , saw marks.
Alloy saw blade sawing wood is usually combined into Dou about tooth teeth, because this combination before the angle, can sharply cut the wood fiber tissue, clean cut. For slotted flat bottom to keep it, use flat teeth tooth or teeth with left-right combinations.

steel blade quenching process

The main part of diamond saw blade is circular thin iron, stone cutting high hardness, if you saw the matrix strength and metal grinding wheel  hardness is not high enough, it may be side blade-shaped, therefore, how to improve the strength of steel , is to ensure the quality of one of the main blade.
Matrix forming the blade after quenching to the billet processing, then what is the quench it? The billet is heated to a temperature of sub-eutectoid steel or eutectoid steel above a certain temperature, holding time, it would be all of the austenite one, and then quickly cooled to  ring saw blades a temperature Ms less (or Ms near isothermal) for martensite (or bainite) transformation, this process is called quenching. Objects can greatly improve the strength of steel, the hardness and wear resistance. Therefore, when machining the blade billet, is an essential step of quenching.Diamond saw blades in China's rapid economic development in the use of more extensive, involving industry stone processing enterprises, especially in the real estate industry, decoration processing must frequently use, this article describes the  diamond core drills classification and use of diamond saw blade shape occasion. Because, according to appearance can easily be classified, there are these types: 1, head-type blades, serrated because it is disconnected two consecutive edges of the blade; diamond saw blade according to the above three points is the shape of the classification. 3, a turbine blade type, as it is a sawtooth-shaped turbine.

Electroplated diamond grinding wheel defects exist

Electroplated diamond grinding wheel defects exist :
1 , using a large positive rake angle machining, tool wear serious , cutting vibration is large, and the substrate and  diamomd core drill bits the coating metal surfaces are not kept firmly binding the abrasive chemical metallurgical bonding , actually only be mechanically entrapped abrasive coating metal mosaic , thus dominated force is small ;
2, the diamond particles heavier load efficiency, for processing efficiency, processing quality , processing costs, and a great influence on the grinding tool life easy to fall off ( or plating flaking ) and lead to an overall failure ;
3 , to increase the holding force Edge 2000 Pads  must be increased coating thickness , and the results highly abrasive bare chip space is reduced, wheel prone to clogging , the cooling effect is poor, prone to burn the workpiece surface ;
4 , the current domestic electroplated grinding wheel manufacturing has not been achieved by optimized processing conditions required to design the best grinding wheel topography, in the domestic diamond coating technology is still in its infancy , as well as the cost of  diamond cbn wheel inputs are big , so in the near future diamond coating there is not much development ;
5, the tool angle change on the tool wear, cutting force and cutting vibration is rake angle , clearance angle and helix angle integrated generated , so the choice we must pay more attention to single-layer electroplated diamond grinding wheel will be significantly restricted these inherent drawbacks its efficient grinding applications .

Grinding wheel burns and their solutions

In view of the workpiece during grinding wheel burns has been plagued by product quality problems, grinding performance, good surface quality . As CBN abrasive grains can be maintained long-term micro- edge sharpness , will make the workpiece machining accuracy and surface roughness values ​​are achieved more satisfactory results , thus allowing the iamond saw blade   workpiece durability increased by 10 % -30 % . Therefore, even if the batch processing of the workpiece, will always get a high shape accuracy and consistency. Grinding wheel burns from the formation mechanism , wheel grinding burn method of examination , grading wheel grinding burn , burn measures to avoid grinding wheel , grinding wheel burn factors , grinding wheel burns solution. Chemical inertness . Cubic boron nitride and iron group elements is  dry bits not easy to produce a chemical reaction , so for a variety of high-speed steel , tool steel , tool steel, high alloy hardened steel , chromium steel, nickel alloys , powder metallurgy steel and high temperature alloys such as high temperature , high hardness , low thermal conductivity of the material is very suitable for grinding . Let's start with basic understanding of the formation of the grinding wheel grinding burn to burn on the grinding wheel to form a complete set of solutions to plan , in which: the choice of the grinding wheel grinding wheel burn process is very important . We produce in order to avoid to avoid burns, burns encountered while to find a reasonable solution . Cost savings , high deposition rate , high wear diamond cup grinding wheel  resistance, high corrosion resistance. Not only to improve the current efficiency , but also increases the wear resistance and corrosion resistance. Applied to any hard chrome plated , including ; microcracks chrome , white chrome , shiny chrome , etc. can also be used . Good quality , process stability , high efficiency , energy conservation, significant economic benefits. For cylindrical grinding burns, internal grinding burns, burns flat grinding , face grinding burns, burns , etc. centerless grinding wheel grinding way . Diamond resin grinding wheel has a good polishing effect , grinding wheel sharp , easy to plug .

diamond segment of the optical properties of diamond

  (1) The brightness of the optical identification (Brilliance) because of the diamond has a very high reflectivity of the  reflection critical angle is small, a wide range of total reflection, total  14 inch saw blade reflection light is easily reflected light is large, resulting in high brightness.
(2) Flashing (Scintillation) is flashing diamond flash, that is, when the diamond or the light source, the observer moves relative to the surface of the white light reflection and flash. Colorless, transparent, well-crystallized poly octahedral shaped diamond surface bodies or, if not Gache grinding can expose good flashing light.Depends not only on the diamond bandsaw blades  performance of the blade diamond, but on the diamond and the binder with the appropriate head of this composite material composed of the overall performance. For marble and other soft stone, head of the mechanical properties required is relatively low, the choice of copper-based binder. The sintering temperature is low but the copper-based binder, strength, low hardness, high toughness, low bonding strength with the diamond. When adding tungsten carbide (WC), the WC or W2C to as a skeleton metal, with the amount of cobalt in order to improve the strength
(3) the dispersion or the wet granite pads  fire (Dispersion or fire) planes of diamond as diverse as prism, can through refraction, reflection and total reflection into the interior of the crystal composition of white light into white color - red, orange, yellow, green, blue, indigo, violet shade.
(4) Gloss (Luster) outstanding diamond-like hard, smooth and bright crystal face or cleavage face in white light reflection effect particularly strong, and this is very characteristic of the role of reflective called adamantine luster.

How to determine the level of diamond saw blades

In general, diamond saw blade working environment is bad, products are mainly used for sawing stone, widely used in marble, granite, ceramic tiles and concrete products for cutting, is stone, building industrial saw blades  materials industry, an important and widely used processing tools.
Circular saw blades cutting with easy operation, high efficiency, good processing quality and other advantages. But noisy, blade rigidity. Easy to produce during cutting blade runout, deviation, resulting in the parallelism of the workpiece to be cut is poor. Saw cutting spindle bear a large force, the swing generated during the cutting, but not cut out straight, the blade thickness can be increased despite increased rigidity, it is  diamond polishing tools still difficult to ensure parallelism of the slice. In addition, the increased thickness of the blade not only increases costs, but also increases the kerf width reduces the volume ratio. Cylindrical cutting line speed is higher, up to 50m / s, the diameter of the saw blade cutting depth by limiting, usually less than the diameter of the third. Currently, the cutting depth is generally not more than 1 meter. The  carbide drill bits most critical quality diamond saw blade with diamond granularity necessary, which is testing the wear resistance of diamond saw blades and sharp the most important indicators.

CVD diamond excellent performance

CVD diamond as a cutting tool material favorable conditions for its unparalleled hardness is caused by the combination of excellent properties. With metal sintered PCD different is the unique nature of natural diamond in CVD diamond have been retained, even at high cutting temperatures also do so. Single crystal diamond hardness and  grinding cup wheel elastic modulus of a good result of CVD diamond wear resistance and dimensional stability.The silicon carbide "sand" test, the independent relative volume loss of CVD diamond PCD lower than 4 times, and 120 times lower than that of tungsten carbide. And metal bonding is not the same PCD compact, thick CVD diamond single crystal diamond material with high cutting temperatures in hardness and wear resistance comparable to or even exceed the single crystal diamond cutting at high temperature hardness and wear resistance Like the natural diamond CVD diamond has a small coefficient of friction generated during cutting and  concrete vibrator can consume a small cutting forces and less friction resistance and excellent heat resistance chip tumor.In dry cutting or high-speed machining, the high lubricating properties of CVD diamond cutting temperature resulting reduction of its superior PCD and other materials, the main favorable conditions. CVD diamond thick film applied to the mechanical aspects of the thermal conductivity of CVD diamond material is tungsten carbide efficiency five times higher thermal conductivity than the PCD 50%. CVD diamond excellent thermal  turbo diamond blade conductivity can be used as a safe route cooling the cutting area. Non-adhesive structure allows CVD diamond tool machining withstand temperatures up offensive 800 ℃, while cobalt sintered PCD when machining temperature close to 700 ℃, it will be heat damaged. Although the PCD can be filtered to prevent cobalt cobalt way resulting decline in the quality of PCD, CVD diamond but also has excellent wear resistance. With metal sintered PCD and tungsten carbide materials, non-binder structure and chemical properties of CVD diamond is more stable. CVD diamond coated cutting tools with synthetic materials such as phenolic resin polymer corrosive obviously has a longer life, CVD diamond cutting tool also against fluid corrosion.

Various uses circular blade

circular blade which extensive use? We usually see mostly circular blade forming entities, not knowing its composition and purpose, only those who know the composition of the circular blade, it  diamond bandsaw blades can be handy to use, after problems, but also to find the appropriate solutions under normal circumstances round blade is mainly used for paper, film, gold, silver, copper and some light cutting the article. That some requirements on the blade, the blade is smaller resistance, wear resistance, higher precision for the goods! Accuracy requirements for the blade, and sometimes required to achieve micron-level precision, because it involves the use of the tape to the information industry, requires  4 inch circular saw blade a realistic reproduction of sound and image is an important condition.
In the circular blade manufacturing process, slitting knives, the accuracy of the tool holder will affect the accuracy of the tape cut, which latter sense and FIG sensitive products, has a very important effect, we have also ultrafine particles of tungsten carbide and The most advanced precision machining precision constant pursuit of the technical aspects, I hope cutting blades  can do better late.
About the cutting blade has its own statement, in general, the upper and lower blade will cut widely used in wire and cable, rubber, aluminum, chemical fiber, non-manufacturing cloth, paper, paper products processing, adhesive tape products, films, composite packaging materials, telecommunications appliances, cigarettes, leather, printing, food and clothing industries. This application is very broad, but also ensure the application diversity.

saw blade is a good high-grade alloy

Now many users for woodworking saw blade alloys have a misunderstanding that alloy saw blade that must be considered a good big saw blade , be considered professional woodworking saw blade . In fact , the fact is not so.
You know, alloy saw two of the most important  concrete saw blades conditions : First, need a good base . Second, the need for high -quality high-grade alloy head .
Imagine a low- grade alloy head even more another big or low level , and can not increase the sharpness of the blade , precision. So head low grade broadsword broadsword with a high level of head is not necessarily proportional . Alloy saw blade is always high grade alloy head , that does not necessarily means that the sword head like.
Broadsword heads are distributors and diamond blade saws  manufacturers making some gimmick, I believe that many users use low grade broadsword head alloy blades will know, in fact, can not be the perfect solution to cutting issue . Of course, high-grade broadsword head on exceptions it. Scope: the cutting carbide up 300mm/min, marble cutting up 100mm/min, flower diamond cutting up 40mm/min, is the traditional reciprocating saw or wire cutting efficiency several times , and its narrow cut ( only 1.2mm ~ 2mm), with grinding cup wheels  traditional reciprocating saws and circular saws can be saved compared to 6 to 10 times the processing of raw materials , the user can bring significant economic benefits , these advantages are the traditional reciprocating saws , circular saws can not be compared the .

With what blade cutting plywood

As users have become increasingly demanding and industrial , but also in the field of homeopathy cutting plywood born professional plywood blades. It is generally used plywood blade outer diameter grinding cup wheels  of the saw blade specifications are 250,300 , usually teeth in 80T, 100T, 120T. That in the end Plywood Saw What difference does ?
Traditional plywood blade for general use around the tooth , so cutting efficiency and speed, but only applied to less demanding cutting plywood processing . So professional plywood blade adjustments according to market demand toothed blade and cutting efficiency .
 First, the choice of the cutting blade should choose chrome or nitrided HSS film , some saw after deposition , the diamond blade saws  steel plate heated and deformed or even beat way through the steel sheet flatten again after cutting Poetry time will again deformed steel , chrome HSS film is specifically designed for stainless steel characteristics for stainless steel cutting .
Second, the cutting machine 300 or more should be selected models, the power can not be too small , the choice of  core bits for concrete the cutting speed , the workpiece to be cut should be based on the type of cross-section and toughness to be. Higher cutting speed , cutting the temperature will be higher. Toughness of the material , the speed slowly ; workpiece cross-section is relatively large, then the speed should be slow . Finally, the cutting temperature will have a great time , cutting fluids, cooling, lubrication and cleaning of the choice of cutting results also play a significant role. The cutting fluid used are mineral oils, vegetable oils , emulsions , etc. , depending on the selected parts for cutting fluid.

blade maintenance problems

 Precision Panel Saw requirements: work, work should ensure that fixed profile positioning in line to eat cutting direction to avoid abnormal cut, do not exert side pressure or curve cutting, feed  abrasive grinding wheels to a smooth, avoid contact with the workpiece edge impact resistance, resulting in blade breakage, or workpiece flying out of an accident. Work, we found that abnormal sound and vibration, cutting surface roughness, or odor, you must immediately terminate the job, timely inspection, troubleshooting to avoid accidents. Cutting and stop cutting at the beginning, do not feed too fast to avoid broken teeth and damaged. If the cutting aluminum or other metal, to General purpose blade  use special cooling and lubrication fluid, to prevent overheating of the blade, resulting in tooth paste, and other damage, affecting the cutting quality. Flutes and suction equipment to ensure smooth flow of slag device to prevent slag accumulation into blocks, affecting production and safety. Dry cutting, do not long continuous cutting, so as not to affect the life of the blade and the cutting effect; wet sheet cutting, water jet cutting should be added, to guard against leakage.
Precision Panel Saw Blade Maintenance:Saw If not concrete saw blades  used immediately, it should be flat or use the hole to hang up, the blade can not be stacked horizontally with other items or foot, and pay attention to moisture and corrosion. When the blade is no longer sharp cutting surface roughness must be promptly re-grinding. Grinding can not change the original angle, and destruction balancing. Blade diameter correction, positioning hole machining, etc., must be carried out by the factory. If the processing is bad, will affect the product effect, and may be dangerous, reaming in principle can not exceed the original diameter 20mm, so as not to affect the balance of stress.

varieties of diamond cutting tool material classification

Diamond tool material is divided into single-crystal diamond (there are two kinds of natural and man-made, natural single crystal diamond expensive part is single crystal synthetic diamond substitute), synthetic polycrystalline diamond (PCD) and synthetic polycrystalline diamond and carbide composite blade (PCD / CC) and CVD diamond.
 Single crystal diamondSingle crystal diamond cutting tool must be used for large particles (mass greater than 0.1g, the best path length not less than 3mm), mainly used in surface roughness, geometry, high precision and dimensional accuracy requirements 

cutting discs  of precision and  ultra precision machining applications fields. Natural diamond single  crystal diamond is the most wear-resistant material. Fine texture of its own, after fine grinding, cutting edge edge edge radius as small as 0.008 ~ 0.005μm. But more brittle natural single crystal diamond, the crystal anisotropy, different surfaces or in the same plane of the crystal in different directions were different hardness, during grinding and use must choose the right direction. The use of harsh conditions, coupled with natural single crystal diamond resources are limited, the price is very expensive, so they use a production PCD, PCD / CC and CVD diamond tools. Some natural single crystal diamond is mainly used for ultra-precision machining non-ferrous metals or gold jewelry production.Synthetic single crystal diamond the size, shape and performance are in good agreement, present due to high pressure technology matures, a certain size concrete saws can be prepared by synthetic single crystal diamond, especially in the processing of high wear-resistant laminated wood, it performance than PCD diamond cutting edge will not cause premature passivated.Synthetic polycrystalline diamond (PCD) and synthetic polycrystalline diamond and carbide composite blade (PCD / CC)PCD is at high temperature (about 1800 ℃), pressure (5 ~ 6MPa), the use of cobalt and other metal binding agent to a number of polycrystalline diamond crystal powder polycrystalline material, although slightly lower than the hardness of a single crystal diamond, but it is randomly oriented diamond grains polymerization, is isotropic, as can be arbitrarily oriented cutting tool sharpening, no natural diamond that must be selected as the best cleavage plane as a rake. In cutting, the cutting edge is very sensitive for accidental damage, wear resistance is also strong, long stay sharp cutting edge, can be used when machining high cutting speed and larger cutting depth (to eat deep) , life is generally higher than the WC-based cemented carbide cutting tools 10 to 500 times, and because the metal binding agent PCD has conductivity, making PCD easy to cut to shape, and is a rich source of raw materials, the  grinding cup wheels price is only a few tenth of natural diamond a fraction of the ten have become traditions WC-based cemented carbide cutting tools, high-performance alternatives.PCD inserts to improve the toughness and weldability in the cemented carbide substrate, sintered or pressed on the surface of 0.5 ~ 1mm thick layer of the composition of PCD diamond composite blade (PCD / CC). PCD / CC welding or machine folder available way of making knives. Due to its good weldability, regrinding easy, low cost, and therefore widely used. Hereupon, PCD and PCD / CC sharp cutting edge of the tool and are not as good surface quality single crystal diamond, while its workability is poor, the grinding ratio is small, it is difficult according to the geometry of any shape head, still not easy to manufacture with chipbreakers indexable end mills and other geometric shapes and complex products.

[ Alloy saw brand ] diamond saw cutting knowledge

1 , idle : in particular, the first use of a new base , the need to idle for about 30 minutes , the summer hot season needs to bring water idling , which aims to further eliminate welding head when matrix effects and enhanced blade rotating at high speed state to maintain the intrinsic quality of memory.
2 , blocks of not less than 0.5m3, and  carbide tipped saw blade placed securely , the bottom should be well- wood pad , plug SUCOOT prison , blocks should be located in symmetrical positions workbench , workbench cars and blocks to ensure the stability , without shaking , shaking phenomenon .
3 , according to the blocks of length, width, height adjusting limit switch, the blade lift and skip the trip in a reliable and effective range. Saw blade should leave before sawing blocks up to 10 ~ 20mm. After sawing , saw cut should be left away from the blocks at the bottom of 20-40mm, knife blade to go about running , you should exit all blocks Jukou  the blade from not less than 150-200mm, to prevent the blade hit Shortage material .
4 , the blade idling stable only after a trial cut  turbo diamond blade blocks are not allowed contact with the blade starts cutting edge blade , cutting blade rotation are not allowed to stop , to withdraw Jukou before stalling .
5 , cutting blocks are shaking if found should immediately stop cutting the blocks to be firmly fixed before it can continue working , cutting , are not allowed to move in any blocks.
6 , the cutting blade and  hole saw blades found a significant slowdown or even clip knife phenomenon , it may be belt slippage , compression nut loose or too large depth of cut , the cutting speed is too fast and other reasons, should be timely adjusted .
7 , the line speed should be processed stone hardness and wear resistance to adapt, line speed table are recommended cutting different types of stone .

[ Alloy saw brand ] alloy saw blade grinding knowledge

1 , coolant grinding teeth grinding fluid that is good or bad decision . Partridge produce large amounts of tungsten grinding , diamond grinding wheel powder, not timely flushing and cleaning  carbide tipped saw blade of grinding wheel tool surface pores , causing the surface of the grinding tool can not grind finish, there is not enough cooling will burn alloys.
2 , grinding teeth grinding effect on the structure . Alloy saw blade grinding teeth model structure is good or bad
And assembly , currently on the market about two types of models: one is floating in Germany Seoul ink types. The type with vertical grinding off , all the advantages of hydraulic stepless movement , all of the feed system using V-shaped guide rail and ball screw work , grinding or big arm with slow feed forward, rewind retraction , Clips cylinder regulator heart, flexible and reliable support piece , pulling teeth accurate positioning, strong self-centering blade positioning heart , arbitrary angle adjustment , cooling flush reasonable , man-machine interface , high precision grinding off , pure grinder rational design ; Type II , which is currently horizontal such as Taiwan and Japan models, the presence of mechanical transmission gears and mechanical clearance dovetail slide accuracy, stable performance low clip , branched  bandsaw blades tablet core adjustment difficult, pulling teeth institution or poor reliability , flat two sides , left and right rear corner is not a heart- mill cut , resulting in large deviation angle difficult to control, mechanical wear disaster ensure accuracy.
3 , welding factor. Welding alloys deviation and impact grinding precision , resulting in a large pressure while grinding , while pressure is small, the posterior horn of the same generation of the above factors , welding angle difference , human unavoidable factors , all of the grinding wheel and other factors generates unavoidable impact .
4 , wheel width affect the quality and size . Optional wheel running gold films , note wheel size , granularity is too diamond tool manufacturer coarse grinding wheel produced traces wheel easy to plug the optional fine granularity grinding less easy to burn knife . Grinding wheel diameter and length width thickness is based alloy and alloy tooth width or different each face the situation, not a corner after corner or front wheel specifications are the same as any different from tooth grinding , must be targeted to choose a suitable Specifications wheel .
5 , grinding feed speed. Alloy saw blade grinding entirely good or bad decision grinding feed rate , generally alloy saw blade feed rate at from 0.5 to 6 mm / s can not exceed this value should be 20 per minute teeth , the ultra in every minute 20 tooth feed rate is too large, it will have serious knife tumors or burning alloy wheel impact generated convex and concave surface precision grinding wheel wasted .

Diamond with adamantine luster and high hardness

The composition of the diamond element C, the crystal was transparent in nature, often with octahedral, tetrahedral, and rhombic dodecahedron has occurred, the color often colorless, yellow, brown, naturally occurring in red, blue, green and so extremely rare. Adamantine luster; refractive diamond cbn wheel  index of 2.417. Hardness of 10, the highest hardness in gems. Density of 3.52g/cm3. Dispersion of 0.044, it is the diamond has a high dispersion, so that the diamond produces colorful color of fire. Diamond Identification
 Diamond with adamantine luster and high hardness, the diamond has been processed gives the first feeling is that its surface with strong luster, ridge angle is extremely sharp. Turn the diamond, the pavilion in its bottom surface visible orange and blue flash. Diamond has lipophilic, the diamond surface drip a drop of oil, you can see the oil on the surface spread into almost a plane. Is the thermal conductivity of diamond gem is the best, even more than the thermal conductivity of the metal are good, so using thermal conductivity meter it can be distinguished from other gemstones, but should be noted that currently there is a gem just artificially produced ---- synthetic silicon carbide, and its thermal conductivity is also high, which can make  sds drill bits use of a magnifying glass, synthetic silicon carbide with diamond with ghosting distinguish. The quality of a diamond is to evaluate four aspects, namely weight (CARAT), color (COLOR), Clarity (CLARITY), cut (CUT), because they are beginning with C, therefore referred to 4C. Weight
 Evaluation of the weight of the primary factor in the diamond, because the price of the diamond is almost the square of the weight of a relationship expressed by the formula: price = weight of 2 × K (factor). Diamond weight commonly "carat" and "minute", said one gram (g) = 5 克拉 (ct), 1 克拉 = 100 points. Carat diamond weighing scales can be used, you can also use high-precision electronic balance, such as the millionth electronic balance. As a unit of weight in carats, the digit after the decimal point, every 9 into a  turbo diamond blade third place. Diamonds can not be weighed against the empirical estimation method can be:
 Standard round diamond = Waist average diameter 2 × depth × 0.0061 (conversion factor, thick waist increased to 0.0064)
 2, the color
 Diamond color can be divided into two series, a series is a colorless to light yellow (brown, gray) series, another series of color series. Color series can be divided into yellow, brown, red, blue, green, pink and so on. 4C, color grading is the first series that is colorless to light yellow (brown, gray) series. Colorless diamonds used in the classification "white" means.

diamonds expensive reason

At present, the reason why diamonds are expensive, and their characteristics are inseparable.First, the diamond hardness, high density. Diamond is the hardest natural substance known, Mohs hardness of 10. The density of 3.52 over its most natural stones, and very stable. The tile saw blade  nature of gravity separation and identification are very important.In addition, the diamond will not only have a high refractive index, but also has a higher dispersion. These two factors, making the diamond cutting and grinding after the show dazzling bright light.
There is a high thermal conductivity of diamond, and its thermal conductivity of copper five times. Designed for the application of this tct saw blades  principle can be used to identify the thermal conductivity meter diamond imitation. Some natural blueDiamond, boron element because, further comprising electrically conductive properties.Diamonds are very stable, temperature changes with minimal impact on its size, it does not react with the acid and alkali.Diamond has the lipophilicity of this nature commonly used in diamond sorting; surface of the water droplets in the diamond shape cutting tools  and will not spread, this property can be used for the identification of diamonds and imitation.High hardness and stable chemical properties make the beauty of the diamond and the environment will not change over time, which is able to increase the value of the diamond foundation. Diamond formed under harsh conditions so scarce reserves, and is non-renewable resources. Into the global market each year are affected by De beers diamond company strictly controlled. The so-called rare

Single crystal diamond cutting tool must be used for large particles

(mass greater than 0.1g, the best path length not less than 3mm), mainly used in surface roughness, geometry, high precision and dimensional accuracy requirements of precision and ultra precision machining applications fields.Natural diamond single crystal diamond is the most wear-resistant material. Fine texture of its own, after fine grinding, cutting edge  edge edge colde saw blade  radius as small as 0.008 ~ 0.005μm. But more brittle natural single crystal diamond, the crystal anisotropy, different surfaces or in the same plane of the crystal in different directions were different hardness, during grinding and use must choose the right direction. The use of harsh conditions, coupled with natural single crystal diamond resources are limited, the price is very expensive, so they use a production PCD, PCD / CC and CVD diamond tools. Natural single crystal diamond diamond saw blade is mainly used for some of the ultra-precision machining non-ferrous metals or gold jewelry production.Synthetic single crystal diamond the size, shape and performance are in good agreement, present due to high pressure technology matures, a certain size can be prepared by synthetic single crystal diamond, especially in the processing of high wear-resistant laminated wood, it performance than PCD diamond cutting edge will metal grinding wheel  not cause premature passivated.Synthetic polycrystalline diamond (PCD) and synthetic polycrystalline diamond and carbide composite blade (PCD / CC)PCD is at high temperature (about 1800 ℃), pressure (5 ~ 6MPa), the use of cobalt and other metal binding agent to a number of polycrystalline diamond crystal powder polycrystalline material, although slightly lower than the hardness of a single crystal diamond, but it is randomly oriented diamond grains polymerization, is isotropic, as can be arbitrarily oriented cutting tool sharpening, no natural diamond that must be selected as the best cleavage plane as a rake. Diamond saw blade during cutting, the cutting edge is very sensitive for accidental damage, wear resistance is also strong, long stay sharp cutting edge, can be used when machining high speeds and larger cutting depth ( eat deep), life in general is higher than WC-based cemented carbide cutting tools 10 to 500 times, and because of PCD in a conductive metal binding agent, making PCD easy cut to shape, and abundant sources of raw materials, and  Diamond tool its price is only dozens of natural diamond a fraction of one to ten, one has become a traditional WC-based cemented carbide cutting tools, high-performance alternatives.PCD inserts to improve the toughness and weldability in the cemented carbide substrate, sintered or pressed on the surface of 0.5 ~ 1mm thick layer of the composition of PCD diamond composite blade (PCD / CC). PCD / CC welding or machine folder available way of making knives. Due to its good weldability, regrinding easy, low cost, and therefore widely used. Diamond saw blade should be noted that, PCD and PCD / CC tool edge sharpness and better surface quality are monocrystalline diamond, while its workability is poor, the grinding ratio is small, it is difficult according to the geometry of any head shape, still can not be easily manufactured with chipbreakers indexable end mills and other geometric shapes and complex products.

Alloy saw blade when grinding many factors

1, the matrix deformation, inconsistent thickness, bore tolerances big. Congenital defects of the base there is a problem, no matter the kind of graphics device, there is grinding errors. Matrix deformation on the two side angle bias; matrix inconsistent thickness right rear corner and edge front corner of bias, such as the existence of cumulative tolerance is too large, the quality and accuracy of the blade severely affected.
2, grinding teeth grinding effect on the structure. Alloy saw blade grinding machine structure and assembly is good or bad, about two types of models currently on the market: one is floating in Germany Seoul ink types. The type with vertical grinding off, all the advantages of hydraulic stepless movement, all of the feed system using V-shaped guide rail and ball screw work, grinding or big arm with slow feed forward, rewind retraction, Clips cylinder regulator center support piece flexible and reliable, accurate positioning pulling teeth, blade positioning center firmly self-centering, arbitrary angle adjustment, cooling flush reasonable, man-machine interface, high precision grinding off, pure grinder rational design; diamond saw two categories namely At present horizontal, such as Taiwan and Japan models, mechanical transmission gears and mechanical clearance exists dovetail slide accuracy, stable performance low clip, branched piece center adjustment difficult, pulling teeth institution or poor reliability, flat two sides, left and right rear corner is not a center grinding, producing large deviation angle difficult to control, mechanical wear disaster ensure accuracy.
3, welding factor. Welding Alloys for moderate deviations and impact grinding precision, resulting in a large pressure while grinding, while pressure is small, the posterior horn of the same generation of the above factors, welding angle difference, human factors will inevitably have on the grinding wheel, etc. factors produce unavoidable impact.
4, wheel width affect the quality and size. Optional wheel running gold films, note wheel size, granularity is too coarse grinding wheel produced traces wheel easy to plug the optional fine granularity grinding less easy to burn knife. Diamond Saw wheel diameter and wheel width  stone drill bits length width thickness is based alloy or a different tooth surfaces and alloys of each case may be, not a corner after corner or front wheel specifications are the same as any different from tooth grinding, must be targeted to choose a suitable size wheel.
5, grinding feed speed. Alloy saw blade grinding entirely good or bad decision grinding feed rate, generally alloy saw blade feed rate at from 0.5 to 6 mm / s can not exceed this value should be 20 per minute teeth, the ultra in every minute 20 tooth feed rate is too large, it will have serious knife tumors or burning alloy wheel impact generated convex and concave surface precision grinding wheel wasted.
6, grinding feed rate, the choice of wheel size on the amount of feed has an extremely important significance. General grinding wheel recommendation to use 180 # 240 # 240 # to use at most an opt 280 # 280 # to 320 #, or to adjust the feed rate.
7, grinding center. All grinding the blade and the substrate as the center, rather than with the blade as the center, get it out flat grinding center, rear angle, rake angle with a processing center can not be sharpened a saw blade, saw blade grinding three processes the center can not be ignored. Grinding diamond saw blade side angle is still careful observation alloy thickness, the thickness change with different grinding center, regardless of how the alloy thickness, the grinding surface grinding wheel center line and the welding position to be maintained in a straight line, or have carbide tipped saw blade  a poor impact angle cutting.
8, pulling teeth institutions can not be ignored. Regardless of how the structure of any grinding, pulling teeth designed to coordinate accuracy sharpening design quality, machine adjustment pulling teeth acupressure reasonable position in the tooth surface, and not with the move is extremely critical, back teeth when pulling teeth claw should flexible and reliable.
9, Clips institutions: institutions firmly clip stable and reliable quality is the main part of the Brothers, the Brothers when any clip institutions can not have the slightest loosening, or grinding teeth deviation seriously out of control.
10, grinding itinerary. Regardless of any part of the blade grinding, grinding grinding stroke is very important, generally require grinding wheel or exit out of the workpiece 1 mm 1 mm is appropriate, or  cutting discs tooth blade produces two faces.
11, the program options: Sharpening generally provided with a rough and fine grinding three different programs options, depending on the degree of demand for product selection, and finally recommended when grinding rake angle grinding process.
12, coolant grinding teeth grinding fluid that is good or bad decision. Diamond saw blade grinding produce large amounts of tungsten partridge, diamond wheel powder, not timely flushing and cleaning of grinding wheel tool surface pores, causing the surface of the grinding tool can not grind finish, there is not enough cooling will burn alloys.

diamond cutting depth is related to wear

saw cutting force conditions and the nature of the important parameters of stone. Generally speaking, when the line speed diamond saw blade is high, should be selected for cutting of small depth, from the stone polishing pads  current technology, the cutting depth of the diamond can choose between 1mm ~ 10mm. Usually with a large diameter saw blade cutting granite blocks, the cutting depth can be controlled within 1mm  2mm between the feed rate should be reduced at the same time. When the line speed diamond saw blade is large, a large cutting depth should be selected. But in performance and tool strength saw the extent permitted, should try to take a greater depth of cut for cutting to improve cutting efficiency. When the machined surface flap discs  when requested, should be used small depth of cut.
 Feed speed: Cutting feedrate incurs stone feed rate. Its size sawing rate impact, the force and the cutting blade heat dissipation area. Its value should be based on the nature of the selected cutting stone. Generally speaking, sawing softer stone, such as marble, may be Diamond tool  appropriate to increase the feed speed, if the feed rate is too low, more conducive to high cutting rates. Sawing fine structure, relatively homogeneous granite, may be appropriate to increase the feed speed, feed rate is too low if the diamond blade easily be polished. But sawing UNEVEN coarse granite structure, should reduce feed speed, otherwise it will cause the blade vibration and reduce fragmentation leading diamond cutting rates. Granite cutting feed rate is generally 9m ~ 12m/min within the selected range.

alloy circular saw blades to improve the life of a number of factors

the matrix requires the selection of materials is good enough base heat-resistant material, high toughness, strength, stress, deformation and side jump smaller base, the base of each one  grinding wheels tooth angle seat depth matrix consistent hole tolerances and high precision, material density, thickness, uniform hardness. 2, try to use low-temperature welding process tooth silver electrode and flux selection and good mobility, to prevent the room temperature quenching dips, welding gear temperature in principle allowed to exceed 750 °, to ensure that every weld tooth tooth tooth welding temperature uniformity and repeat, Try to use bilateral high-frequency generator heating the alloy and the substrate temperature remained the same, to  sds hammer drill bits ensure welded into the oven to eliminate welding stress and the alloy crystal refinement, and keep the weld strength. 3, precision grinding tool life and process using the key in the blade, the blade is not grinding in place various surface resistance, obviously chosen too coarse grinding wheel grinding wheel marks, traces of grinding wheel misalignment, angular asymmetry, any faces two flank , wheel impact blade retraction pressure belt, jump to maintain the minimum diameter runout side rake angle requirements of small, back rake should not use too large, the correct selection of grinding direction of  carbide grinding wheels rotation, and the radial cutting force from low to high, grinding two side angle grinding process first, and then after grinding angle and back rake, rake angle and blade rake angle is the last part of tool manufacture, process violation in front of the tool will bring to the quality of results. 4, to strengthen pre-shipment inspection tool each process must develop a reasonable process, according to the strict and meticulous inspection process, affecting the quality of the reason is very complex tool, bad checks before the process after the process no end of trouble, as long as careful analysis of all factors that can be solved .

As abrasive grinding process is constantly broken or lost

if not timely supplement, will result in leaving because of insufficient density of diamond abrasive disk directly in contact with the iron will not only affect the quality of tool grinding, but Plate Compactor  also because the diamond scratch squeeze role of the disk damage or blockage the pores, thus reducing the life of the grinding disc. Thus, during the grinding process requires frequent to add a new disk grinding paste.In addition, prior to powder coating pretreatment disk grinding disc is also vital, generally required Whetstone SiC abrasive powder or coarse grind performed on the disk to remove the turning grooves to improve the disk flatness. By using a variety of stone and SiC powder grinding disk comparative tests and found that the  ring saw blades disk with TL280ZY1 Whetstone millstone W1 1 hour and then painted with fine diamond powder, get the best grinding disk, then the shortest time to reach a stable disk, grinding After smallest serrated blade. The use of free SiC abrasive powder is easily clogged pores on the disk, so that a large number of diamond powder hard and firmly embedded in the ground plate.Sharpening angle on the quality of groundPolishing sharpening angle q is the linear velocity of the angle between the direction of the blade. When q> 0 ° when the rubbing direction of the blade from the blade point, called the smooth grinding; when q <0 ° when the rubbing direction from the blade point to the cutter body, known as reverse mill. Figure 2 shows the degree of the sharpening serrated blade angle. High tensile strength of the diamond, grinding along, the blade tensile stress, so after grinding teeth smaller degree; inverse mill, the blade to withstand compressive stress, so after grinding teeth greater degree. As can be concrete cutting blade  seen from Figure 2, when q is greater than 0 °, and is close to the minimum serrated blade degree obtained, when the stress edge substantially parallel to the direction of the blade, and the blade in this direction has the highest tensile stress intensity . Parallel to the edge grinding is another advantage of the flank wear scar is parallel with the blade in the cutting process does not copy the machined surface maps to help improve the quality of cutting.

Diamond grinding disc for grinding of cast iron

Single-crystal diamond tool manufacturing processes generally include material selection, orientation, sawing, cogging, installed cards, rough grinding, fine grinding and inspection. Will be selected by the directional diamond original stone after sawing along the  carbide drill bits biggest open plane, get two tool blanks, so that both improve the utilization of diamond material, but also reduce the total amount of polishing. Blooming through the tool can shape up chucking (mosaic or brazing) requirements. Cogging and coarse, fine grinding polishing methods are used.Diamond grinding disc for grinding of cast iron. Grinding disc diameter of about 300mm, organized by the material pore shape, size and proportions of the diamond abrasive are optimized special high phosphorus cast iron. Grinding disc surface inlaid  metal grinding wheel with diamond abrasive powder, the particle size can be from less than 1μm until 40μm. Rough diamond powder particles having a high polishing rate, but poor quality grinding, generally used so coarse meal, and is used when grinding the powder size of less than 1μm. Before grinding, first diamond powder with olive oil or other similar substances mixed into a grinding paste, and then coated on the surface of the grinding plate, place some time for the grinding disc grinding paste to fully penetrate the pores of the cast, and  ring saw blades then a large diamond in pre-grinding disc surface grinding back and forth in order to further strengthen the diamond powder in the cast iron pores mosaic effect. Grinding, polishing the diamond will generally be embedded in a tin bucket, revealing only a surface to be polished. Abrasive grinding disc speed is about 2500r/min, grinding pressure of about 1kg/mm2.

Diamond saw blade diamond segment is the work of the subject

1 diamond size selection
When coarse diamond size and granularity of a single, sharp saw blade, cutting efficiency is high, but the flexural strength of agglomerated diamond drop; when fine or coarse grained diamond size when mixed with saw blade durability, but efficiency is low. Considering these factors, choose diamond size 50/60 mesh is more appropriate.
(2) the selection of diamond concentration  tamping rammer distribution
Within a certain range, when the diamond concentration changes from low to high, the blade sharpness and cutting efficiency decreased, while life is gradually extended; but the concentration is too high, the blade becomes blunt. The use of low concentration, coarse, efficiency will be increased. The use of various parts of the cutting head when the different roles of different concentrations (i.e. three or more layer structure in the intermediate layer can be used in low concentrations), the saw blade during the work head to form an intermediate groove, with helps prevent blade deflection, thereby improving the quality of stone processing.
3 diamond strength selection
Is to ensure the strength of the diamond cutting important indicator of performance. High intensity causes the crystal is broken, the polishing abrasive grains are in use, the sharpness decreased, resulting in performance degradation tool; diamond enough strength when subjected to shock easily broken, difficult to bear heavy cutting. It should choose a strength of 130 ~ 140N.
4 choice of binder phase
Depends not only on the performance of the blade diamond, but on the diamond and the binder with the appropriate head of this composite material composed of the overall performance. For marble and other soft stone, head of the cutting blades  mechanical properties required is relatively low, the choice of copper-based binder. The sintering temperature is low but the copper-based binder, strength, low hardness, high toughness, low bonding strength with the diamond. When adding tungsten carbide (WC), the WC or W2C to as a skeleton metal, with the amount of cobalt in order to improve the strength, hardness and binding properties, and add a small amount of low melting point and low hardness Cu, Sn, Zn and other metal for bonding phase. Main plus ingredients turbo blades  should be finer than 200 mesh size, add ingredients finer than 300 mesh size should be.
5 Select the sintering process
As the temperature increases, the carcass densification improved flexural strength also will increase, and with the holding time, the blank matrix and diamond caked flexural strength increased firstly and then decreased, you can choose 120s at 800 ℃ sintering processes to meet performance requirements.

Users in the selection and use of diamond coated tool

(1) CVD diamond coated with amorphous diamond coating difference
Amorphous diamond (also called diamond-like carbon - Annotation) coatings are deposited using a PVD process carbon. It has a key part of the diamond SP3, SP2 also has some carbon bond; their film hardness is high, but lower than the hardness of diamond film; thickness than we  stone drill bits usually deposited diamond film to be thinner. Machining graphite, amorphous diamond coated tool life is uncoated carbide tools 2-3 times. In contrast, CVD diamond is deposited using CVD process pure diamond coating, machining graphite carbide cutting tool life is 12-20 times, thereby reducing the number of tool changes to improve the reliability and accuracy of processing consistency.
(2) can not be hardened steel with diamond tooling
Diamond from carbon atoms. Certain materials when heated, sucked from the carbon atoms in diamond and carbide is formed in the workpiece. Iron is one such material. Cutting tools with diamond iron group material, the friction generated heat causes diffusion of carbon atoms in carbide grinding wheels  the diamond into the iron, the resulting diamond coating due to chemical wear and premature failure.
(3) restriction diamond tool
Regrinding and (or) heavy coating of diamond coated tools is difficult to guarantee the quality of the coating formed on the surface as the tool for the pure diamond, so the tool with a diamond wheel for re-grinding takes a very long time. In addition, the growth of the diamond tool used. Preparation of the tool will change the chemical properties of the surface, since the coating of this chemical properties requires very precise control, so the effect of the tool recoating difficult to be guaranteed.
(4) diamond coated tool life varies
Like any other tool, diamond coated tool life varies, depending on the material to be cut, the choice of feed rate and cutting speed, and the turbo blades  geometry of the workpiece and so on. Generally, diamond-coated graphite machining tool life is uncoated carbide tools 10-20 times, in some cases, may even be longer. This way, you can use a tool to complete almost any processing tasks without tool change due to tool wear and to avoid disruption and recalibration process, making it possible to achieve unattended machining. The processing of the composite material, is entirely possible to obtain a longer tool life.
According to reports, in the processing of high-density glass fiber, carbon fiber and Gl0-FR4 other difficult machining composite materials, diamond-coated tool life up to uncoated carbide tool 70 times.

single crystal diamond tool machining mechanism

Area remaining after cutting height h = f / (ctgkr + ctgkr ') is the theory of the machined surface roughness, it varies the feed rate f, the tool main and sub declination angle kr kr' the decrease decreases. As the main angle kr Fy force reduction will increase rapidly and wet granite pads  cause tool vibration, reducing the feed rate f will affect the cutting efficiency, it is generally by reducing the deputy angle kr 'to reduce the surface roughness.
Conventional cutting tool surface is rough, poor edge formation, if the choice of the sub angle is too small, while the secondary cutting edge is not flat will be mapped to complex processing of the surface; also exacerbate the other flank and the sub- processing of the friction, the machined surface. "galling." Therefore, in conventional cutting, deputy angle of approximately 2 °, the minimum value of surface roughness, further reduce the deputy angle will cause the deterioration of the quality of the machined surface.
Monocrystalline diamond tool may be less than the surface roughness Ra0.01μm, edge quality can reach at least under the  granite polishing pad microscope at 100 times the defect, combined friction coefficient is extremely small, so the sub-angle limit can be reduced to 0 ~ 2 ' , thereby allowing theoretical surface roughness close to or equal to zero, the actual value of the surface roughness can be achieved ultra-smooth surface or mirror requirements.
Thus, the tool itself, the single crystal diamond tool mirror processing mechanism is through ultra-smooth surface and the tool defect secondary cutting edge (wiper) the role of the theoretical surface roughness values ​​close to zero Mirror processing effect is obtained.
2 single-crystal diamond tool design
Single-crystal diamond tool designed to consider when main factors: ① precision parts to be processed; ② actual processing conditions; ③ diamond material properties.
Design single crystal diamond tool, you  diamond core drills should follow the following principles: ① Because single-crystal diamond high hardness, processing difficulties, so the shape of the tool should be as simple as possible; ② According to single-crystal diamond brittle, poor impact resistance characteristics, should be combined with the actual processing conditions, through the tool geometry are optimized to improve the impact resistance head; ③ precision machined parts according to the requirements of the design wiper length, taking into account the ability of the tool to cut thin.

single crystal diamond tool application

 a single diamond crystal, the crystal structure of the highest density of metal atom such as axial face-centered cubic crystal. Diamond crystal connected between the carbon atoms bond to sp3 hybridized covalent bond, with a strong binding force, stability and direction. The  wet polishing pad unique crystal structure of diamond in nature it has the highest hardness, stiffness, refractive index and thermal conductivity, and high wear resistance, corrosion resistance and chemical stability.
Excellent characteristics of single crystal diamond meet the precision and ultra-precision cutting tool material for most of the requirements and is ideal for precision cutting tool materials. Diamond without internal grain boundaries uniform crystal structure so that the tool cutting edge can theoretically reach the atomic level flatness and sharpness, cut thin cutting ability, high precision, cutting force is small; their diamond tool manufacturer  high hardness and good wear resistance resistance, corrosion resistance and chemical stability can ensure that the tool has a long life, so that it can continue for a long time of cutting, the tool wear can be reduced because of the precision of the parts; its high thermal conductivity can be reduced and the cutting temperature parts thermal deformation.
Single crystal diamond tool in the machining field has an important position, is widely used as a mirror, missiles and rockets navigation gyro, computer hard disk substrate accelerator electron gun, such as ultra  hole saw blades precision mirror of parts. Can also be used in the manufacture of single crystal diamond eye, brain surgeon's scalpel, thin slicing knives and other bio-medical tools. In addition, single-crystal diamond tool in civilian products processing applications are becoming increasingly widespread, from watch parts, aluminum pistons, jewelry and other processing to pens, high-gloss mirror decorative signs and non-ferrous metal parts processing, its application has entered the machining a variety of areas.
This article focuses on the design principles of the single crystal diamond tool and the use of technology.

Stone polishing abrasives what role

Stone with its elegant posture , loved by the people , with economic development , more and more extensive use of stone , especially a variety of public places, but the use of stone , as time changes, there  sanding paper will be pollution and other issues of aging , which can be By way of preliminary cleaning solution , but sometimes must be refurbished by grinding way to achieve the following through abrasive materials , abrasive materials introduced , so that we have a preliminary understanding of this .
Abrasive polishing materials are used , are generally classified ordinary abrasives, superhard abrasive types ; ordinary abrasive including corundum ( corundum, corundum , etc. ) , and  concrete ring saw its main chemical composition Al2O3 ( aluminum oxide ) , silicon carbide ( black silicon carbide, green silicon carbide ) , and its main chemical components of SiC (silicon carbide ) .
Diamond grinding tools are metal, resin , ceramic, etc. , which are classified according to type of binding agent , metal abrasive materials include iron, copper , cobalt-based these categories , will determine the different types of materials, processing costs, which is characterized by long life, but the cost will be higher . resinous abrasive materials, due to the production costs are relatively low, the application should be  cutting discs relatively more, it is now also used for rough grinding to polishing, polishing fine-grained aspects of its greatest advantage ; ceramic diamond in recent years, the fastest growing abrasive tool , its processing performance , the length of metal processing , to avoid resin processing short, is technically a very good advantage, but because of cost reasons , have not seen the stone used in the refurbishment .