broad areas of diamond cutting tools applications

Diamond Tool is mainly used for a variety of non-ferrous metals such as turning aluminum, copper, magnesium and its alloys , tungsten carbide and wear a strong fiber-reinforced plastic materials, metal matrix composites, wood and other non-metallic materials . When machining cutting speed , feed rate and depth of cut depends on the processing conditions and the  GUSHI masonry drill bits hardness of the workpiece material . Synthetic polycrystalline diamond compact (PDC) and application performance close to PCD tools , mainly used in non-ferrous metals , tungsten carbide , ceramics, non-metallic materials ( plastic , hard rubber , carbon rods , wood, cement products, etc. ) , composite materials such as cutting, gradual replacement carbide cutting tools . Because the diamond particles bonded to ask some residual metal and graphite , wherein the bonding metal to form coalesced or vein -like  GUSHI diamond discs distribution state will reduce tool life and wear resistance .
Besides the presence of residues of solvent metal , solvent metal in direct contact with the diamond surface . Lower (PDC) antioxidant capacity and tool heat temperature , so cutting tool is not stable enough . Diamond Thick Film Cutters preparation process is complex, because between the diamond and the low melting point metals and their alloys with high interfacial energy . Diamond generally difficult to be wetted by the low melting point  GUSHI diamond bandsaw blades solder alloy . Weldability is poor, difficult to produce complex geometry tools, welding tools TDF therefore can not be applied at high speed milling . Diamond- coated tools can be applied to high-speed machining , because in addition to diamond coated tools have excellent mechanical properties, diamond coating process capable of producing any complex shape cutters for high speed machining materials such as aluminum, titanium and difficult to process non- aeronautical metallic materials such as graphite electrodes.

different role of core drill bits

First, tell us about this twist , because there are too many types of drills to say , how to understand the difference with other drill twist it ? It is understood that twist the words of the working GUSHI concrete polishing pads  portion has two spiral grooves , the shape of cannabis, hence the name. Secondly , taper shank twist on extended structure, there is the use of what are the advantages? 1 Typically the diameter range of 0.25 to 80 mm . It is mainly composed of a working portion and a shank portion . 2 In order to reduce the guide portion and the hole drilling intramural friction , twist from the direction of the drill tip to gradually reduce the diameter of the shank inverted cone . 3 major influence extended helix angle taper shank twist angle  GUSHI metal grinding wheel of the cutting edge approached the size , strength and chip performance edge flap , typically 25 ° ~ 32 °. 4 spiral groove available milling, grinding , hot-rolled or hot extrusion processing methods such as forming part of the cutting tip drill by grinding . 5 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  GUSHI diamond polishing tools middle , chisel at a negative rake angle ( up to about -55 °), from the squeezing action when drilling . 6 In order to improve the taper shank twist drill cutting lengthened , according to the nature of the processed material will be ground into a variety of cutting part of the revised shape . Not to mention longer taper shank twist drill with efficient appreciation of space, but it is worth it value into the ......

Diamond tools industry development situation analysis

Diamond tools for its unparalleled performance advantages become the accepted , the only effective brittle nonmetallic materials processing tool that broad range of applications , and the continuous extension . Currently , diamond tools are not only widely used in construction , stone processing industry , automotive industry , transport industry, geological survey  GUSHI concrete saws and defense industry and other fields , but also in precious stones, medical equipment, wood , glass, steel , stone handicrafts, ceramics and composite non-metallic hardware many new areas of brittle materials continue to be applied , the demand for diamond tools is a significant increase year by year . Especially in recent years , and its main downstream industry has been rapid development, such as our country has become the world's largest stone production and processing countries ; China's construction industry is also more than 20% annual growth rate , and so on . Development of downstream industries to become diamond tool industry to provide a broad market space. Meanwhile, with the continuous improvement of diamond tool performance , functionality continues to expand, its scope of application has been gradually extended to the semiconductor , aerospace , information and many other areas , these new  GUSHI ceramic tile saw applications, new markets will open up the space of the diamond tool industry . Industries have been expanding, competitive advantage is gradually emerging with the rapid take-off increasingly sophisticated synthetic diamond technology and China 's economy , China has had more diamond tool manufacturing technology accumulation and progress , with a strong manufacturing capacity. Because of the great advantages of Chinese enterprises on labor costs , coupled with the trend of technology research and development to catch up on the hair , making our enterprise has obvious advantages in the product price. Rapid GUSHI diamond polishing tools  growth in market demand , local companies have launched diamond tools , according to the statistics : At present, China has thousands of diamond tools business , has been formed to Danyang , Shijiazhuang and other places as the representative of diamond tools production base , and the emergence of a number of internationally competitive advantages of enterprises . China has become the world's major producer of diamond tools , applications and exporting countries , the annual output value of more than ten billion yuan . Theoretical research and manufacturing of diamond tools and constantly improve the level of...

Some of the major role of Core Drill Bits

First, what is the drill
Is used to drill a workpiece to drilling tools.
Drill generally just (W18Cr4V or W9Cr4V2) made ​​of high-speed, divided twist , flat drill, center drill , countersink hole drilling, deep hole drilling , which is our twist fitter , machining the most  GUSHI metal grinding wheel common drill .
This is a paper I have to talk about is the main method of twist drill sharpening its restructuring . I began to talk about from the twist , first introduces the basic knowledge under twist .
Twist the type and structure:
Straight shank twist drill into , Morse taper shank . Generally straight shank twist drill diameter 13mm or less in diameter Morse taper shank twist drills are in 13mm or more. Typically the twist handle , neck , working part , wherein the working portion and the guide portion , the cutting part . Specifically as shown in Figure
( A ) the handle - is generally used to transfer the clamping force and a smaller diameter than Φ13 mm straight shank drill made ​​it , no clear straight shank drill neck , the diameter of the drill , trademark etc. engraved on the handle directly . Φ13 mm and a diameter greater than generally made taper shank drills , taper shank drills taper is produced according to national standards , according to the size of the drill diameter and made Mohs 1 #, 2 #, 3 #, 4 #, 5 #, etc. taper, the larger the size of the handle numeral greater . Flat tail taper the ends for easy removal and  GUSHI diamond bandsaw blades transfer torque from the drill bit role.
( 2 ) Neck - The neck is connected to the handle portion and a portion of the work , but also for the grinding wheel retraction drill is used , the diameter of the drill itself , materials and trademarks are engraved on the neck.
( 3 ) working part - it is divided into two parts ① cutting guide and the guide portion twist to the right direction to keep working , and when re- sharpening drill bits , cutting guide portion and gradually become part and to work. The guide portion has two parallel helical grooves , is to be formed to accommodate the cutting edge and the removal of the GUSHI turbo diamond blade  chips and facilitate the input of the cutting fluid . There are two edges with a guide portion , its diameter is slightly inverted cone , every 100mm length , shank diameter is reduced to 0.05-0.10mm, both to guide the direction of the drill bit cutting , but also can reduce the drill hole wall friction . ② a key part of the cutting portion of the drill bit , the flank twist of six , five blade consists of: a rake face comprising two , two rear flank , two sub behind the two main cutting edges , two auxiliary cutting edge , a horizontal edge , namely " a sharp three blade ." As shown in Figure
Through these two points , I believe we have fully understood the basics of the drill point , so I can deeper introduce myself sharpening methods and steps up .
Twist mainly by cutting part of the cutting , but we have to start from the drill bit is also part of the transformation . Start sharpening my own way to start talking .

Alloy circular saw blades that content quality inspection

Core Tip:. ① substrate surface finish inspection, application plug blade hole detection, or the naked eye holes over the surface of the knife if there is full contact with the blade edge ruler detect flatness or wavy and pot-shaped, with the end
①. Matrix test surface finish, blade hole  GUSHI colde saw blade plug detection application, or the naked eye hole cutter with completely over the contact surface with the knife blade flatness ruler detection or wavy and pot-shaped, with a client-side jump jump cytometry tooth holder has an oxide or glitches with durometer hardness uniformity detection surface rust and other indicators.
②. Weld inspection wire fluidity, weld strength, welding burns oxide should not be beyond the undercut, solder alloy tooth deflection degrees, depending on the angle between the bottom and the minimum width of the alloy matrix should not be less than 1.2mm, it has cracks, oppose any Alloy Welding pressure detection firmness.
③. Grinding teeth grinding detection plane A, B two tables side by checking with moderate (by surface contact pin) suitable level contacts, detect lateral angle, side front corner by applicable Point
Touch table shows how much depends on the thickness of the alloy with a dial gauge to check, only check the tooth GUSHI tile cutting blades  thickness, but the majority of the blade itself or wavy pot type parameter must have a bad end is always the best way to jump meter is the most accurate test, Also check the tooth surface finish, such as wheel apparent traces of some poor durability of the knife can not see the two flanks, accurate detection angle was still true after grinding. After checking the angle, in radians or allowed to produce clear signs of the wheel or the back rake angle, when the two sides of trails around the tooth jump in line, do not allow left or right high right low left high low, generally detected with a diameter hop, visual inspection main cutting edge in front of the human body is not allowed to  GUSHI carbide saw blades see any white lines, when Lee Tudor feel with obvious edge detected with visual clarity. Blade rake angle or rake smooth wheel Keys, no two blades, domestic mill still hand front corner motive or mechanical automata, often grinding rake angle wheel or front edge retraction pressure, causing the blade to produce an obtuse main cause The main reason the tool is not durable, Germany retract hydraulic lift with grinding function, so the product is very duo Lee grinding.

In the selection of carbide saw blades which should be noted when

Contains tooth carbide saw blades, angle, number of teeth, blade thickness, blade diameter, carbide, etc. Most types of parameters that determine the processing capacity of the saw blade and cutting. When you select the correct selection of the blade to blade parameters based on need. Tooth, tooth commonly have flat teeth, Dou tooth, trapezoidal tooth, inverted  core bits for concrete trapezoidal tooth (Figure 1). Flat teeth the most widely used, mainly for ordinary wood sawing, this tooth is relatively simple, rough kerf, slotting process operating level during tooth formation can bottom. Dou teeth sawing kerf quality is better for cutting all kinds of wood-based panels, plywood. Trapezoidal tooth suitable sawing plywood, fire board, obtain higher cutting quality. Inverted trapezoidal tooth saw blade used in the bottom slot. Zigzag zigzag angle is in the cutting position. Serrated cutting angle affects the performance results. Greatest impact is on the cutting rake angle γ, the angle α, wedge angle β. Rake angle γ is serrated cutting edge angle, the greater the cutting rake angle more brisk, rake angle generally between 10-15 °.
After the angle is the angle between the machined  diamond polishing tools surface of the sawtooth between its role is to prevent the serrations machined friction surface, the smaller the angle the greater the friction, the more smooth the processing products. After the general value of carbide saw blade angle 15 °. Wedge angle is derived from the anterior horn and posterior horn out. But the wedge angle is not too small, it plays a role in keeping the teeth, according to strength, heat resistance, durability degrees. The rake angle γ, the angle α, the wedge angle β of the three equals 90 °. Jagged teeth, 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 is high, but too dense serrated , the chip between the teeth becomes smaller, the heat is easy to cause the blade; sawtooth excessive addition, when the feed amount of mismatch, then cut per tooth is small, the friction will increase with the workpiece edge, the life impact of  concrete diamond blades the blade . Typically tooth pitch 15-25mm, should be selected based on a reasonable number of teeth sawing material. The thickness of the blade from the saw blade in theory, we hope the thinner the better, is actually a kerf consumption. Materials and manufacturing processes carbide saw blade sawing board determines the thickness of the blade. To consider when selecting blade thickness from work and the stability of the blade sawing materials. Diameter and thickness of the blade used for cutting and sawing equipment 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.

Sandpaper in subsistence use of all sizes are too hearty

Sandpaper dipped in water or soapy water and water can be polished during operation can reduce the wear scar, creamy ahead of the coating, and thrifty servant material is not difficult. But  the mill should be lower face painting and coating ability to wait underlying paint layer after complete dry mill, otherwise it is easy to paint  stone drill bits white, absorbent substrates without some initiative mill, in order to protect the disc with sandpaper quality of work, before grinding to polishing tools should be tested.
 Sandpaper in subsistence use of all sizes are too hearty, whether it is plastic industry, metal industry, construction industry or the automotive industry are operating very widespread. Request for the operation of various industries in each sandpaper does not vary, some  characteristics comply with grinding tools, and some sandpaper to comply with  tile cutting blades the shape, material characteristics, such as differences optional sandpaper. It is also a sandpaper disc sand in one species, but the sand is due to the preparation of the disc appearance and operation of divergent samples, so just give it name from scratch, with the addition of a sandpaper is also referred to.
 Sand may be divided into two types of discs, and the non-porous perforated disc sandpaper sandpaper disc, a perforated disc sand to facilitate the discharge of waste in the grinding object debris carbide drill bits  from the hole, advance grinding efficiency. If the disc sand sticking to the speed change master disc, the special operating machinery or hand, using sandpaper polished, mostly for hard and brittle paint kind of grinding, end compared with convenient operation, but disc sand in operation The process will produce a lot of dust, affecting the health scene, which is dominated disc sand to prevent a fragmentation weaknesses problems.

Suggestions to improve the safety of diamond saw blades

Industrial production, there is a certain risk when using a diamond saw blade tool for the protection of life and attention, its security more and more manufacturers and users attention.
2.1 The new EN13236 standard
On the development of a set of safety standards EN13236 safety performance for superhard materials, tools, and we firmly based on years of product safety awareness and stringent safety  metal grinding wheel testing system security diamond saw 2.2 - 2.2.1 recipe optimization improvements through the use of low- the oxygen content of the raw material powder, diameter 200 mm tiles Steel Institute tablets (1.6 mm thick blade, blade height 7 mm) mass pull teeth strength 15 ~ 20N · m, fully meet the EN13236 standard (12.5N · m), stable sales to the European market. 2.2.2 Process optimization - laser welding
The traditional high-frequency welding, bonding strength of the weld (especially at high temperatures) is not high enough, head injuries and other accidents sawing fly collapse-prone process, not the safety and reliability of the blade. The laser beam welding is used as the laser energy is focused, using the mechanism of penetration welding, the molten tip of the buffer layer and the substrate, to form a solid weld even under the blade, drill case without cooling water, and ensures a high weld strength, to ensure the safety of use. Our company truly the heart of the glass  4 inch circular saw blade  rod cutting machine is your company's diamond saw, now dull, and for the price not lower blade, in order to save costs, would like to ask you, what materials grindstone can be re-used to the blade the blade?
Received such a problem, a little depressed, diamond saw blades are generally toothless,
The hardness of diamond is very high (ranked first), so nothing can be worn almost touch it, you can only use a diamond grinding wheel grind slowly, but it is difficult to grind, like the original sharp edge. Encountered such conditions, usually for blade.
Saw the matrix, the matrix of diamond saw blades, alloy saw blade matrix and packaging business, the company is equipped with the stress detector, stress straightening machine, grinding tools, hardness tester, shearing, leveling machines, hydraulic machines, presses, CNC lathes, flat round grinder, and other professional production equipment  hole saw blades and testing equipment. In order to improve enterprise management level, stable blade, saw the matrix, the matrix of diamond saw blades, blade alloy matrix product quality, continue to meet customer demands and expectations, the company strictly regulate the quality and management requirements.

The main mechanism of grinding wheel burns introduction

When the grinding wheel surface temperature , if the cooling measures is not good , it's easy on the workpiece surface ( from tens to hundreds of um um) occur secondary quenching and tempering . If the grinding wheel surface layer of the instant temperature exceeds steels AC1 point, the role of the secondary coolant quenched martensite , while  concrete saw blades in the subsurface due to temperature gradients , short time , only the formation of high-temperature tempering organization This makes the surface and subsurface between the tensile stress and the surface of a thin brittle secondary hardening martensitic , when can not afford , it will crack.
Heat treatment of
A ) residual austenite retained austenite grinding wheel grinding wheel grinding wheel because heat and pressure generated changes occur at the same time may be accompanied by tempering and grinding wheel surface cracks. Amount of residual austenite should be controlled within 30% .
2 ) carbon concentration diffusion layer nitrided layer carbon concentration is too high, easy to form a nitrided layer tissue or excessive free mesh carbide carbide . Because this substance extremely hard , the wheel grinding process may lead to local overheating tendencies and incidence surface tempering . Nitrided layer carbon concentration is too high, the surface will produce excessive residual austenite. Resulting in burns and cracks. Therefore, the surface carbon concentration increases, reducing the performance of the grinding wheel , the general surface carbon concentration should be controlled within the range of 0.75% -0.95 % .
3 ) carbide distribution should be diamond core drills  uniform carbide distribution and morphology , particle size not greater than the average diameter lμm; carbide morphology should be spherical , powdered or finely punctate distribution along the net , mesh or angular carbides are not allowed .
4 ) decarburization heat treatment . Surface or environmental cause improper surface oxidation , so that the workpiece will produce a thin carbon layer , this layer will cause decarburization soft wheel overload or overheating , resulting in surface tempering .
5 ) tempering the premise of ensuring the hardness , the tempering temperature is as high as possible a number , as long as some of the annealing time . This can improve the surface carburized hardened plastic , and the residual stresses are balanced or lower . Improving the abrasive tools  distribution of surface stress . This can reduce the probability of cracks occur workpiece , thereby improving the efficiency of the grinding wheel grinds the workpiece .
6 ) deformation should minimize heat deformation . This reduces the grinding wheel margin. If the heat deformation is too large, if the operation is not in the workpiece grinding wheel radial runout maximum at the beginning of the grinding wheel , grinding wheel each time point at which the grinding wheel is removed margin would not be normal, resulting in burns and cracks.

Relationship between the wheel and the substrate

Wheel base affects their quality and use of molding precision level , today ,  here with you to talk about diamond grinding wheel and the substrate relationship , hoping to give you help.
As with the characteristics of diamond abrasive ( high hardness , high compressive strength , good wear concrete diamond blades  resistance ) , the diamond abrasive in grinding become hard and brittle materials and carbide grinding ideal tool not only high efficiency, precision high, and good roughness , abrasive consumption, long life, but can also improve working conditions . Diamond diamond abrasive wheel features include the type, size, concentration , and geometry of binders . It is widely used for general abrasive difficult to process low iron content of the metal and non-metallic brittle materials , such as tungsten carbide ( carbide ) , alumina ceramic , optical glass , agate gemstone , semiconductor materials , stone , ceramics, ferrite body , hard and brittle materials such as semiconductor materials and metallic materials, grinding , carbide materials, shape Edge 2000 Pads  processing , electrolytic grinding, and grinding center drill with diamond grinding other heavy-duty cutting , grinding abrasion with good , high efficiency, long life characteristics .
Therefore, the collective choice of diamond is very important , everyone in the selection process must be careful . Our resin grinding wheel should have some preliminary understanding, but it should still be enough to understand the properties of a comprehensive , how  diamond cup wheels in everyday use will maximize the efficiency of resin grinding wheel , let us work together to understand :
First, you know, resin grinding wheel is made ​​of resin grinding wheel, such as phenolic , epoxy, polyurethane , polyvinyl alcohol, resin grinding wheel is a high strength, can strengthen the wheel to add fiber mesh and steel , such as our cutting discs, grinding, now most of us are not waterproof resin grinding wheel abrasive grinding fluid could not be used , of course, need to add some resin grinding wheel grinding fluids , such as epoxy , resin grinding wheel is a good finish, not easy to burn currently used in the resin grinding wheel cutting disc, double-end , heavy duty wheels, polishing wheels and so on.

CBN (cubic boron nitride ) grinding purposes

CBN abrasive wheel produced , depending on the process and the different components of the binding agent used can be divided into the following four . Their nature and purpose ( refer to the  concrete saw blades mechanical processing ) are different.
( 1 ) electroplated CBN grinding wheel molding process is simple, low cost of production . Simple but only one layer forming coating, can not be corrected , in the process , is difficult to know when the grinding layer is damaged. For small quantities of complex machining and geometry processing and molding grinding wheel used as a dressing .
( 2 ) CBN sintered density and high hardness, grinding , dressing roller precision machined , high cost. Mainly used in grinding wheel dressing roller and large quantities of superhard materials processing.
( 3 ) Resin CBN grinding wheel manufacturing process is simple, low cost of production . Plastic molding simple but  Diamond tool good correction . For multi- shape small batch processing . Such as tools and tool grinding processing, and glass processing .
( 4 ) vitrified CBN grinding wheel vitrified bond CBN grinding wheel has a strong , high-speed machining workpiece does not burn , and may be amended and durability, etc. , is the best high-speed , high efficiency and high precision grinding tool.
Cubic boron nitride (CBN) grinding wheels suitable diamond discs  for processing a variety of materials the following products: ① high manganese steel ; ② high chromium, nickel, molybdenum alloy steel ; ③ chilled cast iron (HS80 ~ 90); ④ kinds of hardened steel ( HRC55 ~ 65); ⑤ various cast iron (HB200 ~ 400) , etc., and has been in the domestic automobile ( gears , flywheels, shafts, bearings and other processing ) , roll , slurry pump ( impeller, volute , guard, jacket, etc. processing ) , mold , cylinder ; ⑥ glass , gems high hardness soft and tough material , all walks of life to solve the high hardness cutting difficult materials , and to improve work efficiency, greatly saving processing time and power , access to huge economic benefits.

Diamond saw blades for cutting metal can cause

1 , diamond saw blade is characterized by soft afraid of hard afraid
2, the metal part of the plastic material , is for marble, glass , the metal to be "soft" is much more
3 , marble, glass is brittle concrete saw blades  material , harder than the metal
4 , diamond is a valuable material , although the diamond saw blade diamond is a man , but it is expensive , it is made ​​by a method using powder metallurgy , that is, the diamond particles in the metal powder mixed sintering rather backward over the blade , the blade is to wrap diamond grinding wheel for metal rubbed off , exposing the diamond particles less than half the pieces , this is the diamond particles exposed head was cut marble "blade"
5 , diamond saw blade "cut" marble , it granite blade   is actually a diamond will powdered marble , marble which will "cut" open to the
6, if using a diamond saw blade to "cut" metal , "soft" diamond particles of the metal will be "glued down " so that the diamond blade failure . Remember: Do not use diamond saw to cut metal !
7 , with ordinary thin grinding wheel cutting metal is possible, although this wheel is a metal ground into powder, but not as good as diamond grit is precious , and that sand is bonded with a special adhesive overall shape , that is, said that the whole can be " cut" of the sand grains , cylindrical sanding off the back of the sand can continue to "cut"

Line speed is not high , an increase in cutting efficiency , will reduce the life of the blade

feed rate , 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 masonry drill bits  wear of diamond or even fall off , causing the blade consumption too fast , 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 .
Common materials saw feed speed unit : mm / mi the cutting depth for medium hard stone such as marble , limestone cut through at once , for hard stone and abrasive such as large granite, sandstone should step cutting, saw cutting granite monolithic , eating knife depth is generally 10-20mm , depth of cut marble cutting 50-100mm, more than double-sided cutting hard granite , depth of cut of each 3-5mm, should be based on the turbo blades  hardness of the stone , using a saw blade and the fixed performance , efficiency recommend the following table for your reference.
Common materials cutting efficiency table Note: " 1 " indicates low power finishing ; "2" indicates a high power roughing. the blade rotation direction of the same stone as the feed direction along the cutting , contrary to reverse cutting, and reverse cutting, due to an upward vertical force component , in the form of stone off potential, therefore , is a solid stone, under the same conditions next , you should try using tct circular saw blade  smooth cutting . When using reverse cutting, cutting depth to be reduced , generally reduced to shun cutting 1/3-1/2  In summary, the basic requirements for selection cutting process are: low hardness, good stone cutting performance can be deeply walking , brisk walking contrary shallow cut , ie corresponding to the same stone and saw and saw blade should be cutting efficiency, cutting board , good quality, long life blade and matrix process parameters prevail , the four complementary and mutually dependent , must not generalize . For example, when the saw blade cutting speed can not be maintained , indicating a blunt blade , cutting depth should be reduced while increasing the cutting speed to sharpening blades.

potential huge new cutting tool material

With modern science and technology and the development of production, a variety of new materials difficult to machine large number of applications in the product, the traditional carbide tools have  concrete core bits been difficult to meet production needs, while the ceramic tool is its excellent heat resistance, wear , good chemical stability and high cost and by people of all ages. Especially in the field of high-speed cutting and difficult to machine materials, showing the traditional tools can not match advantage.
The use of ceramic cutting tools ordinary steel, cast iron, hardened steel, high manganese steel, nickel-based superalloy, powder  PCD grinding wheel metallurgy sintered parts, glass, steel and a variety of engineering plastics and other difficult to machine materials, tool life and even several times higher than the carbide tools ten times. It can not only in production for general turning, boring and milling, and has been successfully used on the hole processing tool; except in the ordinary use of the machine, but also can be effectively used CNC machine tools and machining centers, high- equipment, is internationally recognized as the most contemporary improve production efficiency as a potential tool. In addition, diamond and cubic boron nitride and other superhard cutting tool compared to the relatively low  concrete ring saw price of ceramic cutting tools (ceramic cutting the main raw material of aluminum oxide, silicon is the most abundant element in the crust, inexhaustible, with inexhaustible), therefore, it was said: "With modern ceramic tool material properties of continuous improvement, in the future it will work with coated carbide cutting tools, diamond and cubic boron nitride and other superhard cutting tool with a high-speed cutting, dry cutting and The three main hard cutting tool. "Figure 1 shows the tool in hard turning using ceramic instead of grinding the carburized hardened gear (57 HRC-59 HRC) synchronization cone part, bore and back The application examples.

diamond abrasive and filler mixed in advance

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 concrete ring saw  fillers can be salts, glass beads or magnetic particles. After 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  tile cutting blades 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 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  concrete saws 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 .

how hard diamonds and diamond physical properties

Modern science and technology, the means to explore the formation of diamond provides new ideas and methods. Diamond is the hardest, most simple ingredients gem, which is composed of carbon atoms, with a cubic structure of natural crystals. Its composition and our diamond hole saw  common coal, pencil lead, and the same constituent sugars, carbon at a higher temperature and pressure, the crystallization of graphite (black), and in high temperature, high pressure and reducing environment (usually it is one kind of oxygen environment) in the crystallization of precious diamonds (white). In order to facilitate the understanding of the origin of diamonds, first look at the original rock containing diamonds.
Since diamonds were discovered in India, we have been hearing people in the river, riverside picked up the story of the diamond, which is due in the river somewhere upstream of diamond original rock, weathered, broken, with the water being brought diamonds to downstream areas, than the major diamond buried in the gravel. What is the original rock diamonds? 1870 people on a farm in South Africa dug in loess diamonds, diamonds  carbide saw blades dug from the riverbed thereafter transferred to the loess, loess Here is rock hard, dark blue, it is the diamond original rock - kimberlite (kimberlite). What is kimberlite?
Kimberlite is formed deep in the earth, contains a lot of carbon dioxide and other volatile components of alkaline ultramafic volcanic rocks often contain such deep from the earth peridotite, eclogite fragments, the main mineral ingredients include olives Stone, phlogopite, carbonate, pyroxene, garnet and so on. Studies have shown that the formation of kimberlite magma deep in the earth 150 km or less. Because of this rock was discovered first in Kimberley, South Africa, so named by the names.
Another original rock containing diamonds known lamproite (lamproite), it is a too alkaline magnesia volcanic rock, mainly composed of leucite, volcanic glass formed may contain pyroxene, olivine and other minerals, typical origin of Western Australia Argyle (Argyle).
Scientists from around the world through a different pair of diamond mines and mineral inclusions natively study found that diamond formation conditions generally pressure 4.5-6.0Gpa (equivalent to 150-200km depth) and a temperature of 1100-1500 degrees Celsius. Although in theory, diamonds can be formed in various periods of history of the earth / phase, while current exploitation of mines, most of the diamonds formed mainly in the 3.3 billion years ago and 12-17 million years these two periods. Some, such as the South African diamond age of about 4.5 billion, indicating that these diamonds in the Earth already begun shortly after the birth of the deep in the earth crystal diamond is the world's oldest gems.
Diamond formation requires a long historical process, which is mainly produced from diamond on Earth ancient stable continental regions can be confirmed. In addition, the stars on the planet extraterrestrial impact, resulting in instantaneous temperature, high pressure, but also the formation of diamonds, such as 1988 years ago, the Soviet Academy of Sciences reported that diamonds were discovered in meteorites, but this effect has no economic value of a diamond formation.
Rare diamonds mainly in two types of rocks, a class is peridotite categories, one is the eclogite, but only the former has economic significance. Diamond-bearing peridotite, so far discovered two types: kimberlite (kimberlite) (name derives from South Africa was a place name - Kimberley) and lamproite (lamproite), both in the rocks are made from volcanic eruptions effect generated deep in the earth's rocks formed by the volcanic activity was brought to the surface or shallow earth, this magmatic rocks mostly tubular output, so called "tube mine" (ie, primary ore).
Diamond-bearing kimberlite or lamproite exposed at the surface, through the wind and rain outside forces such as the role of Earth's weathered, broken, washed in water, the crushing of the original rock drill is brought to bed together, and even the coast Strip the  hole saw blades product down, forming alluvial sand deposits (or secondary deposits).
Just how hard [Diamond]
Diamond is the hardest substance in nature, is a Mohs hardness of 10 unique mineral, it is known as "the king of hardness." Its anti-friction hardness of corundum 140 times, 1100 times more than quartz and thus its unparalleled hardness can be imagined.
It should be pointed out: the hardness of diamonds here that particularly large, it is the ability to resist external forces scored; but it also has a brittle, afraid to hit, strike it or will stumble along its cleavage after crushing. So even though the diamond is the hardest substance in nature, but it is also possible to use a hammer to crack it. Therefore, wearing diamond jewelry, you should pay special attention to protection.

the life of high speed steel circular saw blades

In order to maximize the reduction of the consumption of high-speed steel circular saw blades, each blade reduces cutting costs, increase plant productivity, the actual situation of the following applications for the proposal wants to follow:
1, the new blade test run:
To ensure long life, so that masonry saw blades   circular saws with a new blade (or replace the blade after each grinding) have a full running-in process, the cutting begins within 10 minutes, reducing the feed rate is very necessary The. The next 10 minutes before gradually speed up;
2, cutting and feed rate:
Cutting speed depends on the material being cut sections and toughness, this is difficult for cutting stainless steel, high toughness of the material, the slower the speed is very beneficial  concrete core bits to increase blade life. When the material cross section is small, can be an appropriate increase in engine speed;
3, correct and timely grinding blade:
Blade during operation, due to the role of external forces, the blade pitch and yaw rate, stress, etc. has changed, so there will be larger road saws; surface roughness, clip blade and other phenomena; timely grinding blade, serrated blade to re-raise the angle, pitch accuracy, high-speed steel circular saw blades will increase the use of results;
4, you can judge sawdust observe the  cup grinding wheels current state of cutting blade;
a, very fine sawdust or powdered cutting pressure indicates the size;
b, of a soft cut sawdust that overload;
c, long spiral wire sawdust expressed in good condition;

diamond cutter trimming scope

We usually use the knife at home, not agile, and will look for stones to grind it, not agile how diamond tool repair? In the dressing precision grinding wheel diamond tools (such as internal grinding), you should use a sharp diamond shaped stone, diamond tool if a large  concrete crack chaser amount of high-precision grinding wheel, we recommend using a spherical diamond larger contact area in order to ensure that from fine grind to a coarse trimming range.
Small blade cutter and other cutters classes are primarily used in the following hard metal materials processing or narrow and deep grooves cut milling can also be non-metallic, superhard materials and titanium blade cutter blade cutter main used for cutting hard materials (heat-resistant steel, stainless steel, high-strength steel) milling.
  Carbide blade carbide (more precisely, tungsten carbide and titanium carbide) is a cutting tool of any kind are common materials: for example, saw blades, lathe tools, drills, milling cutter and  cbn grinding wheels dental drill engraving are generally made with carbide. The reason is widely used in such carbide tool, because it is with most other materials remain sharp longer. In addition, some carbide ball pen use, because the pen is more durable.
 Carbide blade eventually become dull. You can be as polished as ordinary steel tools grinding them, but they are very hard, so you want to use a different grinding tools. Usually a diamond coated cemented carbide tools or wheels.
 Diamond Segment Features: Blade's work performance is extremely good, especially in the granite cutting speed, long life, straight cut, do not jump edge, etc. Various specifications can be customized according to customer requirements.
The chemical composition of the sds plus drill bits  diamond C, with the carbon and graphite polymorph variants. In mineral chemical composition, the total content of Si, Mg, Al, Ca, Mn, Ni and other elements, and often contain Na, B, Cu, Fe, Co, Cr, Ti, N and other impurity elements, and carbohydrates.

the Quality Diamond Saw Blades

 One, cutting parameters
(1) blade speed: In practice, the line speed diamond saw blades by equipment conditions, saw the diamond discs  quality and the nature of the restrictions before sawing stone. From the optimum blade life and cutting efficiency, it should be selected depending on the nature of the stone saw blade speed. Sawing granite, the blade speed at 25m ~ 35m / s within the selected range. For high quartz content and difficult cutting granite, remove the blade speed limit is appropriate. Granite tiles in the production, the use of smaller diameter diamond saw blade, the line speed can reach 35m / s.
(2) 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 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.
(3) Cutting Depth: diamond cutting depth is related to wear, effective cutting, saw cutting force conditions and the  12 inch saw blade 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 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 when requested, should be used small depth of cut.
Second, other factors
(1) diamond size: Common diamond size 30/35 ~ 60/80 range. The more hard rock, should be selected with a finer granularity. Because at the same pressure conditions, the more detailed the more sharp diamond, cut hard rock in favor. In addition, the general requirements of a large-diameter blade cutting efficiency is high, with the coarser particle size should be selected; small diameter cutting blade low efficiency, requiring a smooth rock cutting section should be selected fine granularity.
(2) Segment concentration: the so-called diamond concentration, the diamond in the working layer is the carcass in the density distribution. Increasing the concentration of diamond is expected to extend the life of the blade, because of the increased concentration of each piece of diamond is reduced, the average cutting force suffered. However, increasing the wet saw blades  depth of the blade will increase the cost, so there is a concentration of the most economical, and the concentration with VS shear rate increases.
(3) binding agents head hardness: In general, the higher the hardness of the binding agent, the stronger the resistance to abrasion. Thus, when a large rock abrasive cutting, the bonding agent should be high hardness; when the cutting of soft rock material, the hardness of the binding agent should be low; when large and abrasive cutting hard rock, the binding agent should be moderate hardness .
(4) force effects, temperature effects and grinding damage: cutting stone diamond saw blades in the process will be subject to centrifugal force, cutting power, cutting hot alternating load effect.

Classification of diamond tools

Natural diamond (ND) Tool
As a natural diamond pull vine peak spectrum, has the following characteristics:
(A) is displayed at the 1332 Rush existence diamond.
(2) wave amplitude (FWHM) of 4.1cm-1
Displayed as pure diamond. ND is the hardest known mineral substances, mainly for the preparation of turning tools. Fine grinding of natural diamond tool edge radius of up to 0.01 ~ 0.002μm. Where natural single crystal diamond (Single Crystalline Diamond, SCD) cutting edge parts by high magnification 1500x still observed blade smooth. Ra SCD when turning aluminum pistons reach 4μm, and in the same conditions using PCD cutting tool machining time of the surface roughness Ra of 15 ~ 50μm. So the cutting discs  use of SCD tool with precision lathes for precision and ultra-precision machining, get the mirror surface.
Polycrystalline diamond (PCD) cutting tools
PCD is a high temperature high pressure conditions by cobalt and other metal-bonded to synthetic diamond powder sintered polycrystalline material gathered, also known as sintered diamond. Overall sintered polycrystalline diamond cutter cutter for milling, PCD grain was disordered arrangement state, is isotropic, uniform hardness, graphitization temperature is 550 ℃. Tool has high hardness, high thermal conductivity, low thermal expansion coefficient, high elastic modulus and a low coefficient of friction. They are very sharp and so on.
Synthetic polycrystalline diamond compact (PDC) cutter
In order to improve the toughness of PCD inserts and weldability, often made of PCD and carbide cutter body synthetic polycrystalline diamond composite blade (PDc). The surface of the cemented carbide substrate being suppressed 0.5 ~ 1mm thick layer of sintered PCD. The flexural strength of the composite blade with carbide consistent hardness close to PCD, PCD can replace the use. PCD and synthetic polycrystalline diamond compact (PDC) cutter sharp edge and workpiece surface quality than ND. While its workability is poor, the grinding ratio is small, it is difficult according to the turbo diamond blade  geometry of any head shape. Current use of synthetic polycrystalline diamond compact Preparation Tool only, still can not be manufactured with chipbreaker indexable inserts and complex three-dimensional surface geometry cutter.
CVD diamond films (TDF) Soldering Tool
Thick welded diamond cutting tool is good to laser welded to a CVD diamond thick film substrate (usually a class K carbide) to form a composite sheet, and then polishing composite sheet, the second welded to the tool body, sharpening as needed the shape and edge. Figure 3 (a) shows, for the CVD diamond films (diamond film thickness of 30μm), with high hardness, wear resistance, low coefficient of friction, etc., is to create cutting non-ferrous metals and non-metallic materials, the ideal tool materials. Because diamond welding process complex process, CVD diamond films (TDF) welding tool yet high-volume applications.
Diamond coated tools
Diamond coated tools are directly in the cemented carbide by a CVD method (K class carbide) or ceramic layer deposited on the substrate 1 ~ 25μm diamond films, no cleavage plane isotropic. Figure 3 (b). Film coated tool hardness of 9800 ~ 10000HV. High thermal conductivity, thermal conductivity at room temperature up to 2000W · m-1 · K-1, while the carbide thermal conductivity is only 80 ~ 100m-1 · K-1. Diamond CVD method may be coated to any complex shape of the tool, which is polycrystalline diamond can have the most significant advantages.
Cubic boron nitride (PCBN) cutting tools
Cubic boron nitride (PCBN) following the  hole saw blades synthetic diamond hard appears after the second inorganic material, the hardness slightly inferior to diamond, thermal stability, good heat resistance up to 1400 to 1500 degrees, the heat resistance than diamond Xing (700-800 degrees) is almost twice as high. cubic boron nitride (PCBN) cutting tools is mainly suitable for processing a variety of ferrous metals and their alloys; most suitable for a variety of hardened steel (carbon tool steel, bearing steel, high speed tool steel steel) pearlitic gray cast iron (cast iron vanadium and titanium) chilled cast superalloys (nickel base alloy cobalt-based alloys) and surface coating welding processing. has a long life and reduce the number of tool changes, compensation down the time spent, for NC machine tools and automated production line efficiency can be more fully exploited, can change the traditional mechanical processing methods (ie, before quenching with a tool with a grinding wheel roughing and finishing after quenching method), which can be in a quenching CNC machine tools after quenching before turning (turning instead of grinding), with good economic benefits.