Diamond wheel clogging type description

1 ) embedded clogging mechanism and attachment type
    Embedded and dependent type jams are clogging debris mechanically filling in gaps in diamond grinding wheel produced . Fill power from two aspects, one is external , one internal, related to the physical, electrical , thermal , etc. factors.
    External factors : grinding a very important feature , the radial component force Fy is larger than the tangential grinding force component Fz, Fy / Fz ≥ 2 ~ 10, the workpiece material more rigid plastic smaller , Fy / Fz ratio greater , grinding debris such areas are under strong pressure, is mechanically squeezed into the gap between the wheel surface . From  abrasive fibre disc the microscopic analysis of debris along the front of the slide abrasive , abrasive in front of the local area with several layers of debris piled in the back of abrasive due to the role of high-speed rotating grinding wheel , forming a vortex flow area, whirlpool area significantly reduced air pressure in the negative pressure , so that part of the debris attached to the back of the abrasive grains to form abrasive flank dependent clogging material is attached to the majority of ash and particles.
    Electrostatic field : the relative speed of the grinding wheel and the workpiece is much greater than V V sand workers, ordinary grinder V s = 3 ~ 50m / s, the speed of high-speed grinder grinding maturity value is 50 ~ 80 / s, foreign trials at speeds up to 1.5m / s or  Sanding Sheets less 200m / s ~ 250m / s, the speed of the workpiece . When the grinding wheel and the work of the relative motion , arranged according to certain rules of the charge in the grinding area, due to the grinding wheel and the workpiece surface electron escape will cause. Meanwhile , the grinding gas high temperature region will result in the shock due to the discharge , so that the neutral gas is ionized into positive ions and electrons. Some small areas in the grinding zone formed by a small electric field consists of the grinding wheel and the workpiece , the electric field , neutral atoms , positive ions, electrons , impurities, dust , not only the neutral atoms are ionized in the process , there are ion and electron recombination process. In the electric field , the polar part of the debris will be presented according to the principles of opposites attract , and the wheel opposite to the polarity of the debris is adsorbed on the surface of the grinding wheel . Since the electric field strength is small, so the adsorption force is weak, the wheel surface debris is not solid , but by means of mechanical pressure between the larger wheel and the workpiece, the wheel has been adsorbed on the surface of the wear debris can be stably embedded Wheel the gap between the surfaces . ( 2 ) blockage of the adhesion mechanism type :
   Most of the grinding process of grinding the input power into heat, so that the grinding temperature up to 1200K or more points , in such a high temperature, rapid grinding of the first case of air  Bonded abrasives oxidation , a low melting point metal oxide is formed , and then these metals oxide grinding zone was heated to high temperatures melt state , covering the surface of the wheel , when this part of the surface of the grinding wheel on participation once again in the role of the grinding force , and some pushed open , and some strengthening, increasing the affinity and adhesion with the wheel , and the adhered surface of the workpiece is pressed ridge groove surface . Through multiple stochastic grinding , many abrasive debris adhering four weeks , the grinding force increases, the temperature rises , thereby forming a vicious cycle of increased congestion, or the abrasive grain broken off, which is melt adhesive .

With a wheel of a method for cutting a workpiece

Grinding is the grinder as a cutting tool for machining a workpiece with a grinding wheel method. Characteristics of the method are: (1) Since the abrasive wheel itself has high hardness and heat resistance, and therefore the grinding can be processed high hardness materials such as hardened steel, cemented carbide.
2) determine the characteristics and grinding wheel grinding system can make even trace cutting, general ap = 0.001 ~ 0.005mm; high grinding speeds, generally up to v = 30 ~ 50m / s; grinder stiffness; using hydraulic transmission, thus grinding can be economically obtained with  grinding disc high precision (IT6 ~ IT5) and a small surface roughness (Ra = 0.8 ~ 0.2μm). Grinding is one of the main methods for finishing parts. (3) Due to intense friction, leaving the high grinding zone temperature. This causes stress and deformation of the workpiece, causing the surface burns. Therefore must inject a lot of grinding coolant to reduce the grinding temperature. Coolant can also play chip and lubrication. (4) a large radial force when grinding. This will cause the machine - elastic workpiece concession system, the actual depth of cut is less than the nominal depth of cut - wheel. Therefore grinding to be accomplished, the light should not enter the knife mill, to eliminate abrasive sanding belt  errors. (5) After the blunt abrasive grinding force also increased, resulting in grains or broken off, exposing sharp edge again, this feature is called "self-sharpening." Self-sharpening the grinding within a certain time can be normal, but beyond a certain time after the work should be carried out manually trimmed to avoid grinding force increases caused by vibration, noise and damage the quality of the workpiece surface structure and surface grinder grinding machine grinding motion Many species, mainly surface grinder, cylindrical grinder, the grinder, universal cylindrical grinding machine (also grind the hole), gear grinding, thread grinding machine, rail grinding, centerless grinder (grinding cylindrical) and tool grinder (grinding tool), etc. Here surface grinder and movement. 1 Surface grinding machine structure (with M7120A, for example, where: M - class machine grinder; 71 - horizontal axis moments desktop surface grinder; 20 - Working table width is 200mm; A - the first major improvements.)
1) wheel frame - install wheel and drive wheel for high-speed rotation, wheel frame dovetail slide along the rail  ceramic belt movement of lateral clearance of manual or hydraulic. (2) slide - install wheel frame and drive wheel frame rails along the column up and down movement. (3) Column - bearing slide and wheel frame. (4) Bench - installation piece by reciprocating linear motion of the hydraulic system drive for. (5) bed - supporting bench, install other components.
(6) Coolant system - providing coolant (saponification oil) to the grinding zone. (7) hydraulic system - consisting of: a dynamic element - as pumps, hydraulic system pressure oil supply; b actuators - for the cylinders, and other parts of the table driven movement; c control elements - .. various valves, pressure control, speed, direction, etc.;. d of the auxiliary element - such as fuel tanks, pressure gauges.

Tips on using disc sand

 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  narrow belt 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 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 sanding paper roll  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 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 metal cutting wheel 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 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.

Abrasive for use on many parts

Now see abrasives abrasive is a material essential to mention that the owners are people made of abrasive material, made by many people used abrasive replaced it. Like other than diamond, but  shop roll has a natural abrasive performance is not very stable, but that it also has available value. By abrasive when used in the industry, is very very broad role, is played when the processing precision and roughness industrial objects, then the time of abrasives is indispensable, and in addition This addition, like cutting tools and other materials in general, when the wheel of this tool is also essential. Like life in the automotive industry, such as the production of which is through precise gear like density, but also through the process of abrasives and abrasive, there is a good show.
 Like other classes of rigid products also need to go through the processing of high density, so to save time and flap wheel increase efficiency. Abrasives continued improvement
A continuous growth of modern cities, and now visible after our abrasives through a constantly changing, with the heart of the trend. It is now one of the development of China's mold industry producing countries, in addition to the abrasive industry needs some minor improvements.
 Abrasive industry has ever produced a good tip, but at the time of survival with scattered, small scale and so on. Many companies also have quite reasonable, low survival industry, has more small businesses. Affect the ability to enhance the competitiveness of slow, leading to areas such as environmental protection and technology.
 Our abrasives overcapacity, more  Bonded abrasives concentrated in the low-end of the trend, if still a little compared to some distance and international, so it is still in continuous improvement in the mold industry is expected to expose a new style in the future market, for abrasive industry to implement energy conservation, low-power furnace excluded, and actively promote the development of competitive enterprises bigger and stronger.

Abrasives are used for grinding, lapping and polishing tools

Abrasives are used for grinding, lapping and polishing tools. Most artificial abrasive grinding with abrasive plus binders made ​​from natural mineral rock is also useful for direct processing into natural abrasive. Abrasives except in machinery manufacturing and other metal cut off wheel  processing industries are widely used , but also for the processing of food processing, paper industry and ceramic , glass, stone, plastic , rubber, wood and other non-metallic materials. Abrasive during use , when the blunt abrasive , the abrasive agent itself or in conjunction with portions broken broken abrasive grains from the partial or complete loss of the working surface of the abrasive article and the emergence of new cutting edge , sharp or continuously exposing new abrasive grains within a certain time so that the abrasive cutting performance can be maintained . This self-sharpening abrasive , is abrasive tool compared with the general prominent feature .
Abrasives their source of raw materials , zirconia flap disc natural and artificial abrasive abrasive categories. Commonly used in  machinery industry is only natural abrasive whetstone . Artificial abrasive at the basic shape and structure of distinction, there are wheel, grinding , stone, sand tile ( collectively, abrasive ) and coated abrasives five. In addition, the habits of the abrasive slurry as a class . Abrasive used  Grinding wheel china by the abrasive can be divided into ordinary abrasive abrasive and superabrasive abrasive . The former corundum and silicon carbide abrasive general , the latter made ​​of diamond and cubic boron nitride and other superhard abrasive. In addition , there are some special varieties , such as sintered corundum abrasives etc. . Ordinary abrasive abrasive is bonded abrasive solid ordinary form a certain shape and a certain intensity of abrasive. Generally abrasive , binder and pore structure, which is often called the abrasive three parts of the three elements . In abrasive abrasive cutting action from the . Binding agent is a solid form of the abrasive loose abrasive materials , inorganic and organic types. Ceramic inorganic binders , such as magnesite and sodium silicate ; organic resin , rubber and shellac . The most commonly used is a ceramic , resin and rubber binders . Holes in the ground of debris from the chip and chip effect, and can accommodate coolant helps grinding heat dissipation . In order to meet some special processing requirements, the pores can also dipped some fillers , such as sulfur and paraffin , etc., to improve the performance of the abrasive . This filler is also called the fourth abrasive elements . Said ordinary abrasive abrasive characteristics of the project are: the shape, size abrasive , grain size, hardness , organization and binding agents . Grit abrasive hardness refers to the external force , from the degree of difficulty shedding the abrasive surface , which reflects the bond abrasive grip strength . Abrasive hardness depends mainly on how much amount of binder added density and abrasive grit off easily expressed low abrasive hardness ; vice versa , which means that high hardness. Hardness level is generally divided into super- soft , soft , soft , medium, medium hard , hard and superhard grade seven , from these levels can be subdivided in a number of small magnitude. Abrasive hardness measurement method , more commonly used hand cone , mechanical cone method , Rockwell hardness measurement method and blast assay . Hardness and its dynamic modulus of elasticity abrasive has a corresponding relationship , which is conducive to the use of audio measurement abrasive method to represent the dynamic elastic modulus abrasive hardness. In grinding , the high if they are grinding the workpiece material hardness , generally used in low hardness abrasive ; contrary, the use of high hardness abrasive. Coarse abrasive organization into tight , medium and loose categories. And number of each class can be further subdivided , with the organization number to distinguish. Abrasives organization number the greater the share of abrasive in the abrasive volume fraction is smaller, wider gap between the abrasive , the more loose tissue. Conversely , the smaller the organization , said more tightly No. organization . Loose abrasive organization is not easy when you use passive , less heat during the grinding process , the workpiece can reduce heat deformation and burns. Tight organization of abrasive grains not falling, help keep grinding geometry. Abrasives be organized only in the manufacture of abrasive formula by control , generally do not make the determination . Superabrasive abrasive primarily by diamond, cubic boron nitride and binding agent to form a solid abrasive . Because of diamond, cubic boron nitride high price , with good abrasion resistance , they are made ​​with ordinary abrasive abrasive abrasive different , except for super abrasive layer , as well as the transition layer and the substrate . Superabrasive layer is a part of the cutting action , the super abrasive grains and a binder composition . Base support care role is played in the grinding of metal, bakelite or ceramic materials. For connecting the substrate and the buffer layer superhard abrasive layer comprising a binder and, sometimes, may be omitted . The binding agents are used resin, metal, plated metal , and ceramics.

Some of the benefits of superhard abrasive machining characteristics

 Made by the super abrasive grinding tools, its advantages mainly in the following aspects:
 (1) determine the hardness of the main characteristics of the abrasive properties. Superabrasive itself has a very high hardness, it can process a variety of high hardness materials, especially ordinary abrasive materials are difficult to process. For example, diamond abrasive machining of carbide and ceramics, agate, optical  abrasive wheel glass, semiconductor materials, stone, concrete and other non-metallic materials and non-ferrous metals; with CBN abrasive machining tool steel, tool steel, stainless steel, corrosion Hot alloys, especially the processing of high vanadium high speed steel and other ferrous metals, can be processed to obtain satisfactory results.
(2) superhard abrasive wear, long life cycle, grinding ratio, under conditions of fair use, get a good economic  sanding roll results, especially for difficult material with ordinary abrasive machining, better economy .
 (3) superhard abrasives shape and size of the change in use is extremely slow, grinding operations in favor, processing and need frequent replacement wheel, can greatly save hours of work, more suitable for automatic processing of high-precision parts online. Superhard abrasives little trimming in use, some of the super-hard resin bonded abrasives may even need trimming, thus greatly improving the working conditions. (4) superhard abrasives can maintain a sharp cutting edge for a long time, because the smaller  PSA sanding disc the grinding force, which is not only conducive to the improvement of accuracy and finish machining of parts, but also reduce the power consumption of machine tools. (5) superhard abrasive grinding temperature is lower, can greatly improve the surface quality of the workpiece to avoid parts cracks, burns, organizational change and other ills; also greatly improved parts machined surface stress conditions conducive extend the life of parts, so that the overall economic indicators improved.

Stone Tools : low hardness grinding wheel should be high workpiece

Grinding is the grinder as a cutting tool for machining a workpiece with a grinding wheel method . Characteristics of the method are: ( 1 ) Since the abrasive wheel itself has high hardness and heat resistance , and therefore the grinding can be processed high hardness materials such as hardened steel , cemented carbide . ( 2 ) determine the characteristics and grinding wheel grinding system can make even trace cutting , general ap = 0.001 ~ 0.005mm; high grinding speeds , generally up to v = 30 ~ 50m / s; grinder stiffness ; using hydraulic transmission , so grinding can economically obtain high precision (IT6 ~ IT5) and small surface roughness (Ra = 0.8 ~ 0.2μm). Grinding is one of the main methods for finishing parts .
( 3 ) Due to intense friction , leaving abrasive fibre disc  the high grinding zone temperature . This causes stress and deformation of the workpiece , causing the surface burns. Therefore must inject a lot of grinding coolant to reduce the grinding temperature . Coolant can also play chip and lubrication. ( 4 ) a large radial force when grinding . This will cause the machine - elastic workpiece concession system , the actual depth of cut is less than the nominal depth of cut - wheel. Therefore grinding to be accomplished , the light should not enter the knife mill , to eliminate errors. ( 5 ) After the blunt abrasive grinding force also increased , resulting in grains or broken off, exposing sharp edge again , this feature is called " self-sharpening ." Self-sharpening of the grinding time can be within a normal, but over a certain time after the work should be carried out manually trimmed to avoid grinding force increases causing vibration, noise and damage to the workpiece surface . Wheel grinding wheel is a cutting tool , which consists of many small and hard abrasive grains and a binder made ​​of the porous body stick . Directly responsible abrasive cutting work must be sharp and have high hardness, heat resistance and a toughness. Commonly used abrasives are aluminum oxide ( also known as corundum ) and silicon carbide two kinds. Alumina abrasive class high hardness, good toughness, suitable for grinding steel material . Silicon carbide abrasive hardness higher class , more sharp, good thermal conductivity, but more brittle , suitable  metal cutting wheel for grinding cast iron and alloy . Also suitable abrasive grinding wheel , due to its different thickness , surface roughness and the workpiece after the machining efficiency is not the same , for the coarse grinding of coarse grains , fine abrasive grains , the more coarse abrasives , the smaller the grain size number . Binding agents from bonded abrasive effect. The binding agent used is a ceramic , followed by the resin binder. Different materials selected from binders , impact wheel corrosion resistance, strength , heat resistance and toughness . The more firmly bonded abrasive , the more difficult to fall from the wheel , said wheel on the hardness , the hardness of the wheel is the ease of abrasive grinding wheel surface under loads shedding . Off easily called soft , otherwise known as hard . The hardness of the abrasive grinding wheel hardness are two different concepts. Was softer workpiece surface grinding , abrasive edge ( corners ) it is not easy to wear, so that time can be longer abrasive used , that some of the optional bonding firm wheel ( high hardness wheel ) . Conversely , low hardness grinding wheel for high hardness of the workpiece .
Wheel at high speed work , in order  Grinding wheel china to ensure safety, should be checked prior to installation , there should be no cracks and other defects ; To make the wheel steady, balancing test should be carried out before use . After some time working wheel , the surface voids are clogged debris , abrasive acute angle will be blunt , the original geometry is distorted. Must be trimmed and cutting ability to restore the correct geometry. Pen diamond grinding wheel dressing required .

Six polishing abrasives Detailed analytical methods

 1, the mechanical polishing : mechanical polishing is plastically deformed by the cutting surface is polished to remove the convex portions obtained by a smooth surface polishing method generally used Whetstone , wool wheel , sandpaper , abrasive belt , nylon wheels, manual operation is Lord, special parts such as body surface rotation , you can  abrasive fibre disc use the turntable and other aids, high surface quality requirements can be thrown over lapping method . Super abrasive lapping and polishing is a special abrasive in polishing liquid containing abrasive , and pressed on the surface of the workpiece to be machined for high-speed rotation. The polishing method is the highest age . Optical lens mold often use this method , chemical polishing : chemical polishing is to make the material in the chemical medium surface micro- convex and concave portions preferential dissolution of some of the more , resulting in a smooth surface . The main advantage of this method is that the device does not need a complex , the complex shape of the workpiece can be  metal cutting wheel polished , many workpieces can be simultaneously polished , high efficiency. The core problem is formulated chemical polishing polishing solution 3 , electrolytic polishing : electrolytic polishing and chemical polishing the same basic principle , namely by selectively dissolving the surface of fine convex portions , the surface smooth. Compared with chemical polishing, can eliminate the impact of the cathodic reaction , the effect is better. Electrochemical polishing process of leveling the macro and micro leveling . 4 , ultrasonic polishing : the workpiece into the abrasive suspension and placed in an ultrasonic field together , relying on the role of ultrasonic oscillations , so that the abrasive grinding and polishing the surface of the workpiece . Ultrasonic machining macroscopic force is small , does not cause deformation of the workpiece , but the tooling fabrication and installation more difficult. Ultrasonic machining can be combined with chemical or electrochemical methods. In the etching solution , based on the electrolysis , the solution was stirred and then applying ultrasonic vibration to the workpiece surface from the lysate , or near the surface of the electrolyte uniform corrosion ; ultrasonic cavitation in a liquid is also possible to suppress the corrosion process , in favor of the surface luster . 5 , fluid polishing : polishing fluid is relying on high-speed flow of liquid abrasive scouring and polishing the surface to achieve the purpose of carrying . Common methods are : silicon carbide abrasive jet machining , liquid jet machining , grinding fluid power . Fluid energy mill is driven by hydraulic medium that carry high speed abrasive liquid flow through the reciprocation of the workpiece surface. Medium used mainly in low pressure flowing through specific compounds and mixed with good abrasive made ​​from silicon  Grinding wheel china carbide abrasives abrasive powder can be used . 6 , magnetic polishing : Magnetic polishing using abrasive in the magnetic field of magnetic abrasive brush formed on the workpiece grinding. This method is the high processing efficiency , good quality and processing conditions, easy to control, good working conditions. Using a suitable abrasive surface roughness can be achieved Ra0.1μm.
 Plastic mold with the polishing surface of said polishing required in other industries are very different , strictly speaking , do abrasive polishing abrasive should be called mirror finish . It is not only for polishing itself has high demands and surface flatness, smoothness and geometric accuracy is also very high standard. Surface finish is generally only required to get shiny surface . Mirror processing precision molds or mechanical polishing based.

the data is also known as polishing abrasive materials

With sticky abrasive material is abrasive and acceptance made of special process approach dedicated polishing wheel grinder fast in reverse, the parts close to the friction with  the polishing wheel, abrasive on the sharp edges round the parts smooth and shiny appearance grinding process process approach.
Polishing INFORMATION Primary effect  abrasive belt is the appearance of the workpiece can burrs, scratches, traces of erosion, weld, welding slag, blisters, bubbles, oxide film, char, rather than substance, and not the ablation alkaline solution to remove other impurities , also make all kinds of micro-defects can be improved.
First, the data is also known as polishing abrasive materials, ordinary is polishing paste, abrasive, polishing sand, polishing, abrasives, polishing things in general. Grinding documentation belong  abrasive sanding belt to the "hardware stuff" category. Abrasive materials, abrasive Information mortal include: sandpaper, grinding wheel, emery cloth, wire wheels, grindstones, Whetstone, grinding, grinding, abrasive belt, cutting discs, grinding blocks, plates, wheel, cloth wheel, sponge wheel, flax wheel and other abrasive. Abrasive grinding data include: polishing paste, polishing oil, polishing liquid, carborundum, polishing paste, polishing wax, polishing soap, polishing sand, black corundum abrasives, abrasive corundum, white corundum abrasives, chromium corundum abrasives, abrasive corundum natural and artificial grinding disc  abrasives abrasives and other abrasives.
Second, the abrasive polishing paste data varieties yellow polishing paste. Feldspar powder and paint from the fat, fatty acids, pine nasal spray, Huang Dan, lime, soil and other common Pink made for iron, copper, aluminum and bakelite, etc. polishing; white polishing paste. The lime and fatty acids, stearic acid, paint fat, suet, tallow, ground wax together made for copper, nickel, aluminum and bakelite etc. polishing.

Simple analysis of cubic boron nitride (CBN) abrasive application technology

Materials complement each other, so that the scope of application of superhard materials greatly broadened. Compared to ordinary abrasive abrasive , CBN abrasive with high-speed , efficient processing of high quality , long life, low cost, high speed CNC grinding machine can be used as efficient tool of choice for high precision grinding . In the automotive  abrasive manufacture industry , machine tools , bearings and so has a wide range of applications .
1, CBN nature
 When the CBN for abrasive materials , we study its hardness , wear resistance, strength and thermal conductivity and other properties. CBN hardness is much higher than other conventional abrasives. High hardness means cutting stronger , sharper ;
 CBN has high wear resistance , which means it harder than normal abrasive wear . The ability to maintain the shape of the CBN abrasive as one of the main characteristics of high-performance abrasives ; CBN high compressive strength , which means that when used under harsh conditions it can remain intact and not broken particles ; CBN has good thermal resistance, can be achieved in grinding cold cutting . Due to the different nature of some of CBN and diamond , the scope of their work material is different . CBN materials for processing tool steel , bearing steel , alloy steel , super alloys, cast iron . The materials suitable for processing diamond carbide, glass , ceramic , cermet, cast iron. 2, CBN abrasive CBN grinding systems use different sandpaper roll  types of binding agent and the CBN bonded abrasive tool into a certain shape . It is only through rational grinding process , relying on the superiority of the grinder can , in order to maximize its effect. In the CBN grinding technology research and application , the CBN must be abrasive, grinding machines, parts, repair , cooling, grinding and other factors into a system to be optimized in order to obtain the best technical and economic results.
 CBN grinding technology several important factors to be considered are as follows . 2-1 CBN abrasive grinding in the manufacture of primary consideration and selection of the shape, size , CBN abrasive particle size , concentration, type of binding agent and the use of speed and other parameters . CBN abrasive shape, size and marking by GB/T6409.2-1996 and Bonded abrasives  GB/T6409.1-1994 standard requirements ;
Four CBN abrasive binder ( resin, metal , ceramic , plating ), the fastest growing ceramic bond . This is due to the high ceramic CBN abrasive grinding efficiency, good shape retention , durability, ease of repair , wheel long life, thus becoming efficient, high-precision grinding abrasive of choice .

suitable for hand or machine grinding mill

Sponge sandpaper is a mobile phone casing surface as the most highest utilization rate should be polished and abrasive applications such as Foxconn, Pegatron, Huawei, prestige, accessible, BYD and other  cutting and grinding disc large mobile phone shell grinding plant, especially for like iphone, sansung, millet various processes such as cell phone case polished surface. Since 2006, the sponge sandpaper polished by the patch applied to the model to move to the best cell phone case sanding sandpaper after mandatory from the initial 3M sandpaper sponge, NORTON sponge sandpaper, LUCKYSTAR sponge sandpaper and other imported original products in the market three pillars, due to imports high cost, long period of goods, factories continue to reduce production costs to pursue slowly emerged on the market over the possessions  zirconia flap disc  brand developed the production of sponge sandpaper, of which the trader profits abrasives plant produced DLC sponge sandpaper sandpaper sponge in the domestic more prominent, and its products using, corundum, silicon carbide, white fused alumina, zirconia alumina abrasive such as a substrate with the best quality of the binder coated sponge, sponge sandpaper all in strict accordance with the production process for production abroad, not only cheap, quality is more and imported sponge sandpaper same, Since the product launch has been mini flap disc  a number of large enterprises to adopt on the phone casing polished product with a high temperature, acid, etc., suitable for hand or machine grinding mill, but also in accordance with the requirements of any customer, any model tailored to fit the needs of the sponge sandpaper, separable cut long or round, gum, back velvet different sponge sandpaper, grit 120-180 thickest and most fine of up to 3000-4000 or finer, and the other to provide OEM customized business.
(3) Soft water resistance test After the test the sandpaper, air at 20 ℃ remain after lh, to a diameter of 15 ~ 60mm, 180 on the rod. Bending, surface cracking observed situation. Fine sand smaller diameter rods, thick sand then use larger diameter rod, with its hole in crack width not exceeding 1.5 times the thickness of sandpaper qualified.