How to choose diamond core drills according to different uses

DrillWe drill is widely used in construction machinery hardware, it is used in the drilling of solid material through holes or blind holes , and is able to have the hole reaming tools. However, we choose different operating environments are also different types of drill bits , drill bits used mainly twist , flat drill, center drill , deep hole drilling and core drill . Reamer and countersink drill , although not on the physical material drilling, but the habit will also drill them into a class . Here , together with Xiaobian look at different types of drill bits for different uses of it .
Twist is the most widely -processing tool . Diameter in the GUSHI concrete polishing pads  range of usually 0.25 to 80 mm . It is mainly composed of a working portion and a shank portion . Working part has two spiral grooves , the shape of cannabis, hence the name. In order to reduce the wall of the guide portion and the hole drilling friction , twist from the direction of the drill tip to gradually reduce the diameter of the shank inverted cone . Twist the helix angle corner came mainly affect the size of the cutting edge , edge flap strength and chip performance , typically 25 ° ~ 32 °. Available spiral groove milling, grinding , hot rolling or hot extrusion processing methods , the cutting portion is formed by sharpening the drill tip . Vertex standard twist drill cutting part 118 , chisel edge angle is 40 ° ~ 60 °, the angle of 8 ° ~ 20 °. For structural reasons , the rake angle at the outer edge of the large decreases toward the middle , chisel at a negative rake angle ( up to about -55 °), from the squeezing action when drilling . In order to improve the cutting twist drill , according to the nature of the material to be machined and ground into the cutting portion of the repair various shapes ( such as drilling group ) . There shank twist and form two straight shank taper shank , when caught in the drill chuck machining the former , the latter is inserted in the machine spindle or tailstock taper in . General manufacturing HSS twist drill . Inserts welded carbide blade or twist the crown for machining cast  GUSHI tile cutting blades iron , hardened steel and non-metallic materials , solid carbide twist drills for machining small parts and printed circuit boards and other instrumentation .
Flat diamond cutting part Spade, simple structure, low cost, easy to import coolant hole, but cutting and chip performance is poor . Flat structure with integral drilled and assembled two. Integral mainly for drilling diameter of 0.03 to 0.5 mm pores . Fabricated flat diamond blade can be changed, the cooling can be mainly used for drilling large diameter holes 25 to 500 millimeters.
Deep hole drilling process usually refers to the ratio of the aperture hole depth and hole cutter more than 6 . Commonly used gun drilling , BTA deep hole drilling, jet drilling , DF deep hole drilling. Nesting also commonly used in deep hole drilling process .
The reamer 3 to 4 teeth , better rigidity than the  GUSHI cutting discs twist drill , a hole has been used to expand and improve the machining accuracy and finish .
Countersink drill has more teeth to the hole forming method will be processed into the desired shape of the end for the processing of various countersunk head screws countersunk holes , or outer end face flattened hole.
Center drill for drilling shaft center hole with a piece , which is essentially a small twist of the helix angle drill and countersink compounded , so called composite center drill.
Hollow drill drill drill pipe is hollow in the middle , the main material used for core drilling .

Some simple introduction diamomd core drill bits for

Twist is fixed by rotating the cutting axis relative to the workpiece hole drilling tools. Its capacity and shape into a spiral flute twist named. Helical groove has two grooves, slots or more grooves 3, but the most common two grooves.
  Limiting aperture diameter twist drill by  GUSHI concrete saws the spiral groove to make finer core drilling, drill bit low stiffness; only two edges with guide, easily skewed axis of the hole; chisel difficult to make a centering axial resistance increases, drill easy to swing. Therefore, the drilled hole shape and position errors. Twist the flank and rake face is curved along the main cutting edge the rake angle at each point, the angle  GUSHI metal grinding wheel is not the same as the front transverse edge of the corner of -55 °. Cutting conditions are poor; distribution along the cutting edge of the cutting speed is unreasonable, the maximum intensity of the lowest point of a sword cutting so badly worn. Therefore, the hole machining accuracy is low. The whole cutting edge of the drill cutting edges participants, each point on the cutting edge not equal, the chip is easy to form a spiral, chip difficult.
  Therefore, chips and the hole wall  GUSHI diamond discs friction extrusion often scratch the cell walls, a low surface roughness after processing.

Some factors drill bits working conditions

PDC drill extremely harsh working conditions , not only in the work under enormous pressure , but also to withstand the impact of alternating composite role of various forces cause friction in the cutting process is intense, as the matrix PDC drill not only to strong mechanical GUSHI carbide saw blades  properties, but also by a good thermal shock resistance and corrosion resistance. Pants body material, precision machining, heat treatment , welding , etc. after grinding becomes very important , which requires pants body material to high quality carbon steel, processed into pants body to make the appropriate heat treatment, ie after quenching low-temperature tempering , the hardness of the surface after the heat-treated pants between 40 ~ 42HRC, tempered martensite .
Separating the main reason underpinning the diamond layer and WC diamond coating layer is less mature and stable technology , poor adhesion of the diamond and the substrate , resulting in premature lapse diamond film was peeled from the WC denture base layer , greatly reducing the life of  GUSHI circular blades the drill bit and cutting . Process measures progress / Substrate Adhesion : purification surface roughening treatment to remove the carbide tool during the manufacturing process inevitably remain in the substrate surface contaminants, adsorption , oxides , to alter the surface of the substrate microstructure ; addition to the lower surface of the adhesion strength of WC particles , to increase the contact area of ​​the reaction gas sources and the substrate , the substrate surface to increase the surface energy , the progress of the diamond substrate on heterogeneous nucleation density , thereby enhancing the film / substrate adhesion. Commonly used methods are: chemical cleaning , mechanical mosaic powder , liquid ultrasonic treatment. PDC thermal residual stress is the main cause of its non- normal failure , reduce internal thermal GUSHI carbide drill bits  residual stresses PDC PDC is progressive performance most effective way , through the use of non-planar gradient transition connection technology and technology that can increase the PCD layer and hard carbide and the contact area of ​​the stress relaxation due to the physical performance parameters of the difference in thermal expansion coefficients of the two materials , the elastic modulus of the resulting concentrate . Only take the form of specific structures and transitional justice to be graded in order to effectively reduce the thermal residual stress PDC , its ability to impact fracture gaining the upper hand , the progress of its yield and lifetime. The internal stress of the diamond powder and titanium powder sintered layer , the DLC film , a tungsten / diamond gradient composition layer method , the film is preferably eliminated due to lattice mismatch with the base plate , the difference in coefficient of thermal expansion caused by : applying an intermediate layer .

diamond core drills line describes the role of the saw blade

Saw blade about the role of the first line is used to cut a sheet of solid material circular tool collectively. Blade can be divided into: diamond saw blade for stone cutting; materials for metal cutting HSS film (not inlaid carbide tip); for wood, furniture, plywood, aluminum, aluminum , radiators, plastics, steel and other cutting carbide saw blades. Carbide alloy GUSHI stone drill bits  containing carbide saw blade type, a plurality of parameters of material, diameter, number of teeth, thickness, profile, angle, pore size of the matrix, which determine the processing capacity and the cutting blade. When you select the type of cutting blade according to the material, thickness, cutting speed, cutting direction, feeding speed, road width requires the correct selection of the saw blade. (A) the choice of carbide species commonly used types of tungsten carbide cobalt (Code YG), tungsten, titanium category (Code YT). Select ⒈ (two) 65Mn spring steel substrate elasticity and plastic, the material economy, good hardenability heat treatment, the heating temperature is low, deformation can be used for less demanding requirements of the cutting blade. ⒉ carbon tool steel carbon high thermal conductivity, but by 200 ℃ -250 ℃ temperature sharp decline in its hardness and wear resistance, heat treatment deformation, poor hardenability, tempering a long time easy to crack. Materials such  GUSHI cutting disc for drill as tool manufacturing economy T8A, T10A, T12A and so on. ⒊ alloy tool steels compared with carbon tool steel, heat resistance, wear resistance, good processing performance, heat distortion temperature of 300 ℃ -400 ℃ suitable for the manufacture of high-grade alloy saw blade. Permeability, hardness and rigidity ⒋ speed tool steel with good quenching, less heat distortion, is ultra-high strength steel, suitable for the manufacture of high-grade thermoplastic stable thin saw blade. (C) the choice of diameter and thickness of the blade diameter sawing equipment used for sawing and related artifacts. Blade diameter is small, the cutting speed is relatively low; blade diameter saw blade and cutting equipment requirements will be higher, while cutting efficiency is high. The outer diameter of the circular saw blade different  machine models choose to use according to the diameter of the blade matches. (D) Select the number of teeth of the serrated teeth, the teeth more generally, the more the cutting edge per unit time, the better the cutting performance, but required more and more carbide cutting teeth number, the price of the blade high, but the jagged too close, the teeth of the chip becomes smaller, easy to cause the blade fever; another jagged too, when the feed rate mismatch, it rarely cut per tooth, will exacerbate friction with the workpiece edge , affect the life of the blade. Typically tooth pitch 15-25mm, should be selected based on a reasonable number of teeth sawing material. (E) the choice of the thickness of the blade thickness theoretically we hope blade thinner the better, is actually a kerf consumption. Materials and manufacturing processes alloy saw blade matrix determines the thickness of the blade, the thickness is too thin, easy to shake when the blade work, the impact of cutting effect. To consider when GUSHI abrasive grinding wheels  selecting blade thickness from work and the stability of the blade sawing materials. Some special-purpose material thickness are also specific requirements, equipment requirements should be based on use, such as slotting saw blades, saw blades crossed. (F) the choice of common tooth tooth tooth left and right (alternating teeth), flat teeth, flat teeth ladder (low gear), inverted trapezoidal tooth (inverted conical teeth), dovetail teeth (tooth hump), and does not common industrial grade three left-right, left right left right flat teeth and so on. ⒈ the most widely used around the teeth, fast cutting, grinding is relatively simple. For open crosscut saw all kinds of materials and soft and hard wood profiles and MDF, plywood, particle board, etc. Equipped with anti-rebound force protection around the tooth tooth tooth is dovetail for longitudinal cutting of all kinds have burl panels; around tooth saw blade with a negative rake angle due to the sharp serrated, good cutting quality, typically used for stickers panel sawing.

Complete interpretation of quality drill bits second development

CNC deep hole drilling ( gun drill ) in recent years developed a deep hole

machining new technology. The traditional deep GUSHI circular blades  hole machining ( hole depth

and aperture ratio greater than 5 ) , requires drilling, boring , thick

hinges , grinding , and other procedures in order to process a higher

accuracy and lower surface roughness of the hole . The new technology is

the use of special tools and high-pressure structure of cooling and

lubrication systems , multi-channel processes described above can be

simplified to a considerable depth consecutive passes completed high

precision and low surface roughness of hole machining , high efficiency of

this process , significant economic benefits .
Excellent performance cutting fluid deep hole drilling deep hole drilling

process is one of the key technologies , deep GUSHI carbide drill bits  hole drilling cutting fluid

must have the following properties:
1 ) good cooling effect, eliminating the heat generated due to the

deformation and friction , inhibiting BUE formation.
2 ) Good high temperature lubrication, reducing friction and wear blade

and support to ensure the tool to maintain good lubrication at high

temperature cutting zone .
3 ) good permeability , chip , so that timely cutting fluid penetration

into the blade, and to ensure the smooth chip discharge . Thus , deep hole

drilling cutting fluid requires a high extreme pressure and low viscosity.
Mechanical products, styling products series occupies a large proportion .

Mostly the same series of styling products have the same or similar

contour features in traditional modeling methods for product design,

inevitably the model geometry the size and shape of the structure

repeatedly modified , adjusted and optimized , low design efficiency. In

order to improve design efficiency , styling products for serialization ,

you can use the parametric design method . Parametric design is the use of

a set of parameters to constrain the geometry of the product model , in

order to facilitate the realization of the variability of the product

model , design reusability and fast it can shorten the  GUSHI brick saws design and

development cycle and improve design efficiency , freeing the designer

from the tedious modeling work, put more energy into the model analysis ,

and improvement of innovative work, for subsequent finite element analysis

and formulation process ready to work .
The most widely used in the drilling of the twist styling products also

belong to the series , the same type of high-quality twist drill has

structural features are similar , but differ in terms of size parameters.

Based on high-quality drill design software , call the API target for

secondary development to achieve the parametric modeling of complex

spatial design twist front surface flank , flank , flutes and cutting edge

belt.

Ropes diamond core drills into Coring advantage

Coring Drilling Coring advantages:
1 auxiliary reducing tripping time, increasing net drilling time, drilling deeper economic effect is more significant;
2 core blockage can gain immediate, rock cores taken to improve the rate;
(3) reduce the manual workers;
4 screwed reduce unloading drill wear and  GUSHI tile cutter extend the life of the drill pipe, tubing reduce consumption;
5 Reduce sweep drill hole wear, unscrew and remove the chance of collision with the hole wall. Extend bit life;
6 reduce fluid suction and pressure loss of balance hole wall opportunity to reduce accidents hole;
7 reduce tripping rope mechanical wear and consumption;
8 reduce drilling bending, improve the quality of drilling;
9 drilled repeatedly in favor of the formation, to avoid the collapse of the hole wall blocks away;
10. Coring winch rope can devolve inclinometer in the drill, conducted inclinometer.
In short, Coring, can significantly GUSHI brick saws  improve drilling efficiency, ensure quality rock cores, reduce drilling costs. Coring Drilling need to have the condition:
In the core drilling, the realization Coring, you must have the following major technical conditions:
1 reasonable structure, reliable performance, including core drilling with salvage, positioning, suspension, messenger, single-action, de-regulation and security cards and other agencies rope core core tube and fisher;
2 Action flexible, durable tool ancillary equipment, including drill pipe holder, put lead, a coring winch rope, etc.;
3 high intensity inside and outside the flat drill with drill body and after quenching, the appearance of high-frequency hardening, hard chrome plating composed of male and female threaded joints;
4 long life and high efficiency of the diamond drill bit, the species has stepped table inlaid natural diamond drill bits, different lip surface shapes and natural progesterone diamond head table inlaid with a  GUSHI cutting disc for drill combination of impregnated diamond bits;
5. Adopt reasonable rules and coring drilling process technique.

wet core bits maintenance

Concrete coring machine maintenance:
1, regularly check the connection of the components of concrete coring machine, if loose should be timely adjusted.
 2, when the drill bit into the big macro suppliers GUSHI abrasive flap wheels Experimental Instrument Co., Ltd. Tel 13131796580, lithium grease should be added at the two threads.
 3, after the end of the drilling rig will be cleaned each part and add oil in the column and the rack.
 4, when the concrete coring machine gear box GUSHI circular blades  every six months for lithium-based grease.
Concrete coring machine structures:
  Rigs drilling vertical structure of two columns vertically downward direction from the gasoline engine, gearbox, spindle, drill, column, base lifting structure, cooling to the pump, running gear and other components.
 Concrete coring machine works:
  Rig the alloy material helical gear teeth induction hardened, can be durable wheels via a pair of belt driven rotary synthetic diamond drill work, lifting structure using advanced ball screw easy and convenient, thick-walled seamless steel column , after the precision grinding hard  GUSHI carbide drill bits chrome plating surface treatment, counterclockwise rotation of the drill bit and move up and down to achieve the purpose of drilling or coring.