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.
PCD grinding wheel
2013年10月25日星期五
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.
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.
2013年10月24日星期四
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 .
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 .
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 .
2013年10月21日星期一
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.
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.
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.
2013年10月11日星期五
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.
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.
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.
2013年10月10日星期四
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 .
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 .
2013年10月9日星期三
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.
(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.
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.
2013年10月8日星期二
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.
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.
2013年10月7日星期一
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 .
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.
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.
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