Trace trim wheel to take

The success of the grinding wheel dressing technology secrets , to the greatest increase grinding wheel performance is the key factor is the good shaping and sharpening tools and skilled finishing  mini flap disc skills. If the tool is not firmly clamped , it will cause vibration noise , produce ripples in the part surface strain and damage parts of the surface dressing tools . Density unevenness and the quality of the wheel geometry , will affect the inherent balance wheel . This means that you must maintain the balance wheel .
Vibrations are trimmed enemies, in dressing the grinding wheel , effectively reduce the vibration and avoid dressing the wheel marks left on the surface , such as collision and damage to the dressing tool , is crucial. Only when the dry grinding wheel to take on a dry dressing . Using a filter for precision filtration of the cooling liquid , to avoid dirt or chips in multiple cycles of the coolant . Otherwise it would diamond dressing tools, hot and cold extreme temperature changes , cracks or broken. When the dressing tool and the wheel contact start trimming, never allow trimming tools from coolant exit. When the diamond grinding wheel dressing tools through when installing a coolant nozzle , fill the wheel surface , or to continue to raise the coolant diamond dressing tools . According to experience , the choice of one 3/8 inch diameter cooling fluid , can be excluded from a lot of heat on the dresser , extending the life of the dresser . Even faster speed of lateral movement of a good dressing wheel surface can improve the performance of grinding wheel , to increase the grinding efficiency and lower parts of the grinding wheel china  surface roughness . Slow lateral movement speed can also cause wheel vibration and burn parts of the surface . Lateral movement is too slow , it will block grinding , damage parts of the surface roughness and metal removal rates . It required surface roughness of machined parts and metal removal rates have played a key role.
Lateral movement speed by dressing tool in shaping the wheel surface speed. A multi- point contact of the dressing tool without tilt angle . The optimum amount of dressing after several repair addition , both the geometry of the wheel recovery , but also just produce good grinding blade as a criterion. This is a very wrong idea.
Taken to reduce trace trimming  Sanding Sheets trimming time , as if there is always a desire to select bigger depth repair except temptation . For internal grinder with grinding wheels, diamond dressing tools will be close to the highest point of cylindrical grinding wheel ( ie grinding holes Parts / wheel contact point ) to be trimmed , which is more important. The highest point of the cylindrical part and the highest point is called cylindrical grinding wheel parts / wheel contact point diamond dressing tools should be placed as close to the part / wheel contact point wheel dressing . For the chisel head and molding dressing tools , which normally takes before they blunt 180 ° to rotate once . Use a blunt tool to trim the dressing wheel surface , will make wheel blunt .

Abrasives business as long as the enterprise

Blog marketing concept can be said there is no strict definition, in simple terms, is to use the blog this form of online marketing network applications. It is the form of corporate blog, marketing blog, etc., is the blog administrator through the log in the form of  mini flap disc soft paper-like marketing hype, through corporate blog promotion and marketing blog to complete a marketing approach.
Internet hype
Internet hype in general is the use of online media, or by pushing the hand behind the man, launching online writers for a person or company, or institution two comments, one aspect is a positive effect on the other hand negative effects. Our companies can seize some opportunities to participate in public welfare activities such as company information such as speculation, to establish positive healthy image of our business, if  non woven flap wheel you can get a good effort to master the appropriate publicity, more effective.
Online Shop
In recent years the rise of business site, they can give their member companies to provide massive demand for information, products booth, corporate information, etc. also establish credibility through, Paypal and other online trading platform integrity, which greatly facilitates the enterprise and between enterprises, mutual trust between enterprises and users, and greatly to promote the rapid development of online business, enterprise and users a convenient bridge, which we show our coated abrasives business integrity, showcase our product image, promote the corporate image will essential platform for our business is a good channel to collect customer information, much closer cooperation between enterprises in the distance.
Abrasives business as long as the abrasive roll  enterprise website construction, based on a series of promotional measures by the above, will make it easier for customers to understand our company and establish a corporate image, promote the company's products eventually reach of enterprise customers and the public awareness and recognition

Electroplated diamond grinding wheel more extensive use

Electroplated diamond grinding wheel with diamond electroplated electroplated way to put on the wheel, diamond tools suitable for the opposite sex can be electroplated grinding wheel grinding and chamfer dimensions. After the sand, thickening step diamond particles fixed to the base body, the working surface is formed with a sharp diamond composite coating of nickel, a combination of strong, high grinding efficiency, the shape error is small. Electroplated diamond grinding wheel is by far the human invention extremely hard materials and tools, an endless variety of new materials can only be used hard before processing them, they are all kinds of high-tech materials and finished products to provide strong support for the development of There are several hundred times the national economic development leverage leveraging effect.
Such as:
1 optical glass industry electroplated diamond dig riving knife can be directly on the plate in the optical glass dig all kinds of optical instruments lens round billets. This is the first cut into the box before then gradually processed into a diamond grinding wheel round billet old process compared to a significant reduction in raw materials, reducing the  Mounted flap wheel process and improve the work efficiency.
 Emerging foreign manufactured by electroplating mesh soft grinding, these electroplated diamond products with diamond cup wheels, grinding wheels, diamond tools, such as fine films realized from cutting optical glass processing, cutting, grinding, edging to the convex surface of the grinding and polishing process of a series of comprehensive reform.
(2) mechanical processing industry
Electroplated diamond wheel trim molding has been successfully used with ordinary grinding wheel, or directly to velcro disc  the workpiece profile grinding. Is today the grinding profile grinding direction of technology development, the application of electroplated diamond wheel molding effectively promoted the development of this advanced technology grinding, diamond wheel has been in the automotive, aircraft, machinery manufacturing industry is widely used in machining the crankshaft, bearings, hydraulic valves, racks, gears, shafts between the grooves, steering knuckle, worm, screw taps, the cylinder of the piston ring grooves, steam turbine and gas turbine blade root slot, and so on. Diamond grinding head, grinding machining is widely used in a hard metal or hardened steel molds or parts of various shapes and inner bore surface.
3 Electrical and Electronics Industry
 Inner and outer circles of electroplated diamond cutting sheets are cut semiconductors, gems, jade and  Bonded abrasives other precious this hard and brittle materials, the best tools, and the like silicon germanium semiconductor material to be cut and polished using a wire saw cutting method inefficient, while the use of electroplated cutting disc sawing, not only efficient, but also narrow kerf less material loss.

The usefulness of organic abrasive

 Resin abrasive mainly used in steel, automobiles, bearings, railways, vehicles, shipbuilding, chemical, instrumentation, aerospace, building materials and other mechanical processing industries. Can be used for processing various non-metallic materials and metal materials. Such  abrasive belt as: wood, rubber, plastics, glass, ceramics, stone, copper, aluminum, cast iron, steel, etc., as well as cemented carbide, high speed steel, high vanadium steel, titanium steel, stainless steel and so on. In addition, food processing, medical and geological exploration and other fields have to be applied. According to the processing and usage of different purposes, can be shortage of grinding, roughing, semi-fine grinding, fine grinding, fine grinding and precision low roughness grinding. Meanwhile, according to the processing of different objects, for cylindrical grinding, internal grinding, surface grinding, tool grinding, special grinding, welding and grinding, honing, super finishing, grinding and polishing.
1, coarse roughing machining applications refers to the efficient cutting a lot of extra material as the main portable belt feature of the method of grinding. Snagging is widely used for processing many kinds of coarse commonly known. Rough machining applications: (a) resin shortage and high-speed heavy-duty resin grinding wheel grinding wheel, coarse annealed or annealed high-quality alloy steel or stainless steel billet Finishing. For surface appearance defects (weld cracks, oxide layer, etc.) grinding. (2) grinding wheel with the casting resin shortage of gates, risers and billet seam for grinding and general Finishing. 3) Resin grinding wheel shortage forging, forging gate renovated large burrs or burrs left to carry out a thorough sanding. (4) during the welding operation, the remaining surface of the weld seam to be used on a flat seam and an inverted snagging grinding. (5) of large plates cut into round air or other complex shapes, cutting the resulting  cut off wheel slag grinding mill waste to be used in addition to the portable. Such as: large hot-rolled structural shapes and tubes cut crude legitimate work and so on. Two, hand-held grinding applications handheld grinding grinding method is comprehensive summary. Their common feature is: whether it is supporting the workpiece or the workpiece grinding machinery in contact with the abrasive, guidance, and mobile have directly rely on manual. Hand grinding is divided into fixed and mobile handheld handheld grinding grinding. The grinding machine fixed, handheld grinding workpiece way, called a fixed-held grinding. Processing using a hand-held grinding machine for grinding a movable manner, referred to as mobile handheld grinding. Hand Grinding main application areas: (1) using portable grinding wheel resin shortage, processing large and bulky hard parts installed on the grinder. Such as: large castings coarse (2) high-speed cymbals shape grinding wheel or steel, paper, processing has been assembled with other 'parts of the workpiece. Such as: heavy construction components and ship components. (3) for small adjustments required for grinding. Such as: In large parts of the limited common position on calibration assembly.

Side grinding Question

Side grinding Question: grinders everyday use, we often find that some operators, regardless of the type of grinding machine, regardless of the type of wheel, casually on the side of the grinding wheel to use, this is a serious breach of security rules of conduct illegal abrasive belt  operations. Procedures used by the peripheral surface should not be used to do the side face of the grinding wheel, this wheel radial strength greater axial strength is small, the operator excessive force will cause wheel broken, even wounding, in the actual The use of the process should prohibit such behavior. Positive operational problems: in daily use, many operators facing the wheel always used to operate because this direction can be put into effect, in fact, this behavior is grinding machine operation should specifically prohibited behavior. Follow the rules, use the grinder grinding the workpiece, the standard abrasives  operator should stand on the side of the wheel, the front wheel must not be operated in order to avoid wheel faulty, or the wheel broken wheel flying flying out. Force operational issues: the use of the grinder, some operators, especially the younger operators, for the sake of grinding speed, force too much too fast, which is a very unsafe practices. Any wheel flat body has a certain intensity, doing so may cause the wheel broken, and even flying out, but  abrasive disc also a should be prohibited. Common operational problems: the actual daily operations, there are also so happens, someone rush production tasks, grab the working time, the two share a grinding machine simultaneously, which is a serious violation operational behavior, should be strictly prohibited . A grinder is not enough time, can be used to add grinders solution, and definitely not at the same time share a grinder.

the main grinding machine guards

Therefore, requiring great than or equal to 200mm straight sand loaded on the card office after hours should first conduct static balancing, wheel trimmed after shaping or imbalance found in the work, it should be repeated static balance.
Matching problem mainly refers to thin cutting wheel  the installation of the chuck and grinding wheel logistic problems. According to standards, wheel diameter not less than chuck is mounted sand office diameter of 1/3, and the corresponding provisions of the wheel wear to a diameter of 10mm diameter larger than the chuck should be replaced with a new wheel. So there is a chuck and grinding wheel matching problem, otherwise it will be the case, "big horse car" caused by equipment and material waste; "small horse cart" do not meet the safety requirements, could easily lead to accidents. Therefore, chuck and grinding wheel reasonable match, one can save  sandpaper roll the device, cut about materials; hand and meet the safe operation requirements. Furthermore, the wheel should be installed between the chuck chuck diameter greater than the diameter 2mm, 1mm ~ 2mm thick cushion.
Shield is the main grinding machine guards, whose role is: When the wheel at work for some reason destroyed, effectively covering the wheel debris, to ensure the safety of personnel. Grinding shield round and square shape, not exceed the maximum opening angle of 90 °; protective  grinding wheel manufacture cover is made of a steel tensile strength of not less than 415N/mm2. Replaced with new wheel when the protective cover installed to solid and reliable, and shields do not disassemble or discard. Gear grinding machine quiet panel is one of the main protective accessories, protective cover above the horizontal plane of the spindle opening is larger than or equal to 30 (must be set for this device.

grinding wheel dressing method

Comparative advantages and disadvantages: ① dressing for a long time, low efficiency, diamond knife life is not long, you need anytime grinding. ② modification of accuracy depends on the mother plate and the moving components of the manufacturing and mounting accuracy sanding roll  and motion uniformity. In mass production is difficult to maintain the consistency of tooth. ③ lower production costs
Scope: The most widely used for single-line and multi-line wheel dressing for ball screws, ball nut, acme screw, a small batch
Methods: metal roller extrusion trim
Brief Description: Wheel Material CrWMn, hardness 65HRC, on the rollers to open several flutes. Rolling wheel to sandpaper roll  slow down when repair, wheel driven synchronously rotating rollers, roller by squeezing the wheel surface grit crushed or make it fall off.
Comparative advantages and disadvantages: metal roller is easy to manufacture, low cost, requires a thread grinding wheel deceleration devices. After dressing the grinding of the workpiece surface roughness higher accuracy than diamond toothed wheel. Metal roller easy to  abrasive disc wear, lower life.
Scope: For single-piece, small-batch production, low-precision or high-precision screw thread trimming coarse modification. Requirements threaded grinding wheel spindle has sufficient rigidity.

Resin basic concepts of centerless grinding wheel

 Resin basic concepts of centerless grinding wheel, resin grinding wheel for centerless grinding is a highly productive method of precision machining, centerless grinder or in the inner and outer circle jig with a centerless grinder grinding workpiece external  sandpaper roll surface , called the support type centerless grinding. centerless cylindrical grinding and centerless grinding collectively support type centerless grinding.
In normal operation, the wheel rotates in the same direction, and introduction, the workpiece and the grinding wheel opposite to the steering. Typically, in order to feed the workpiece axial movement of the guide wire should be relatively wheel axle axis is inclined at an angle of guide wheel. Therefore, a single Hyperboloid similar shapes to ensure that the workpiece and the guide wheel of the line contact. However, if you  metal cutting wheel think that the movement of the workpiece depends entirely on the guide wheel, then this view is not entirely correct. Because the grinding process, the grinding short if the workpiece and the workpiece line speed of the wire guide wheel axle along the guide line speed changes, but the variation of the two entirely different. Therefore, not only the movement of the workpiece and the grinding wheel, guide wheel, and the wheel movement of the Bonded abrasives  material pallets, guide wheel motion, the grinding allowance, but also by the geometrical layout of centerless grinding. Thus, the movement of the grinding work, the guide wheel and the result of the combined effects of the pallet.

Grinding inner circle divided into the following four categories

Grinding inner circle divided into the following four categories: speed electric aerostatic bearing inner circle grinding, grinding inner circle of mechanical transmission, pneumatic and electric grinding inner circle inner circle grinding.
Aerostatic bearing speed electric grinding inner cutting and grinding disc  circle: The aerostatic bearing (supply pressure is 40 ~ 65MPa), grinding system rigidity, both electric grinding characteristics, speed up 180000R/MIN, suitable for grinding a ~ 10MM hole.
Inner circle grinding mechanical transmission: mainly by the spindle, bearings, sleeve body shell, flat supporting pulleys and other components. Then, after replacement of the long axis, is used to grind different bore diameter and length, for comparison, the use cut off wheel  of low speed, the speed is generally lower than 2000R/MIN.
Wind-driven inner circle grinding: spindle with a turbine driven by compressed air turbine rotates the spindle speed, spindle speed reaches 10000R/MIN. Moreover, small vibration, pressure can be adjusted stepless. And with regulators, filters and other accessories.
Electric grinding inner circle: A  abrasive cloth belt three-phase asynchronous motor direct drive, and another by a high-frequency electric motor driven spindle speed of up to 50000 ~ 90000R/MIN. Output power is larger, instantaneous overload, speed characteristics hard, little vibration.

brasive particle size

grinding tool surface roughness easier although guaranteed, but prone to chipping blade, serrated blade degree difficult to reduce. Tool edge ultra-precision machining requirements under the microscope at 500 times without chipping, so to optimize all aspects of  the grinding process, in order to obtain a perfect straight edge.
Abrasive powder particle size and  ceramic flap disc surface condition of the grinding disc grinding quality of
As can be seen, the coarse large impact on the blade, serrated edge grinding degree is large, basically difficult to grind the cutting edge without chipping; while the use of powder, the grinding blade after a few minutes that is changed have straight, zigzag degree tends to zero.
Newly manufactured grinding disc machining accuracy due to limitations of its disk roughness greater stability  cut off wheel for grinding have a certain influence. In addition, just coated abrasive particles in the disk itself is also poor contour. After a period of grinding, the high point on the disk surface is ground flat, the larger abrasive particles may also be broken or shovel from the disk, so that the contour of the abrasive grains is improved, the blade serrated reduced degree of stability. So for the blade or diamond tool grinding and other key processes, grinding disc must be in a stable on the disk.

Grinding is the most minor of a class of abrasive

Can be divided according to the ordinary abrasives abrasives (corundum and silicon carbide, etc.) and natural abrasive grinding wheels and superabrasive (diamond and cubic boron nitride) grinding wheel;
 Shape can be divided according to level grinding wheels, bevel wheel, cylindrical grinding wheels, cup wheels, disc wheel, etc.; binding agents can be classified according to the ceramic grinding wheel, resin grinding wheel, rubber wheel, metal grinding wheel. Characteristic  abrasive sanding belt parameters of the wheel with secondary abrasive, viscosity, hardness, binders, shape, size and so on.
As usually at high speed wheel task, so use should be stopped before turning experiments (to ensure tasks at the highest speed wheel will not break) and static equilibrium experiments (to avoid machine vibrations caused by the task). Wheel in the task for some time, you should stop grinding trimmed to restore function and correct geometry. Grinder with a grinding wheel is characterized by:
As violent friction, leaving the grinding zone temperature is high. This will form the stress and deformation of the workpiece occurs, even the formation of the workpiece appearance burns. Therefore necessary to inject a small amount of grinding coolant to reduce Mounted flap wheel  the grinding temperature. Coolant can also play the role of BTA and smooth. Grinding large radial forces. This will form a machine - wheel - workpiece flexibility piecemeal concessions, so practice cutting depth less than the nominal depth of cut. Thus grinding to be completed, you should not feed stop light grinding to eliminate errors.
After blunt abrasive, grinding force also increased, resulting in grain crushing or scattered, re-exposed sharp edge, this feature is called "self-sharpening." Self-sharpening grinding in a certain day within the normal stop, but beyond a certain task day after manual trimming should be stopped to avoid grinding force increases caused by vibration, noise  flap disc and damage the workpiece surface quality. As abrasive wheel itself has high hardness and heat resistance, and thus high hardness grinding can process information, such as hardened steel, carbide, etc.. Grinding wheel and the grinding process piecemeal resolution characteristics can be averaged trace cutting, general ap = 0.001 ~ 0.005mm; grinding speed is high, normal up to v = 30 ~ 50m / s; grinder stiffness; adopts hydraulic transmission, Thus grinding energy economically achieve high precision (IT6 ~ IT5) and the appearance of small roughness (Ra = 0.8 ~ 0.2μm). Grinding is one way of parts finishing secondary

Side grinding Question

 grinders everyday use, we often find that some operators, regardless of the type of grinding machine, regardless of the type of wheel, casually on the side of the grinding wheel to use, this is a serious breach of security rules of conduct illegal operations. Procedures used by the peripheral surface should not be used to do the side face of the grinding wheel, this wheel radial strength greater axial strength is small, the operator excessive force will cause wheel broken, even wounding, in the actual The use of the process should prohibit such behavior. Positive operational problems: in daily use, many operators facing the wheel always used to operate because this direction can be put into effect, in fact, this behavior is grinding machine operation should specifically prohibited behavior. Follow the rules, use the grinder grinding the workpiece, the operator should stand on the side of the wheel, the  portable belt front wheel must not be operated in order to avoid wheel faulty, or the wheel broken wheel flying flying out. Force operational issues: the use of the grinder, some operators, especially the younger operators, for the sake of grinding speed, force too much too fast, which is a very unsafe practices. Any wheel flat body has a certain intensity, doing so may cause the wheel broken, and  Sanding Sheets even flying out, but also a should be prohibited. Common operational problems: the actual daily operations, there are also so happens, someone rush production tasks, grab the working time, the two share a grinding machine simultaneously, which is a serious violation operational behavior, should be strictly prohibited . A grinder is not enough time, can be used to add grinders solution, and definitely not at the same time share a grinder.Any grinding wheel wear problems has its use of a certain wear requirements, wear reaches a certain level must be re-replacement of the grinding wheel. Not in order to save material, it requires the use of ultra-wear, which is a very unsafe violations. General rule, when the wheel wear to chuck diameter than the diameter of 10mm, it  DC wheel should be replaced with new wheel. Valid questions from the Treasury brought out a new wheel is not necessarily qualified wheel, or even buy a new wheel from the factory are not necessarily qualified wheel. Any wheel has its certain expiration date, the expiration date of use, it is qualified wheel; than valid to use, it is not necessarily qualified wheel. Statutes provides that "wheel should be used within the validity period, resin and rubber bonded grinding wheel storage after one year must be approved by rotation test, those who pass before using." Texture problems in the course, if we find the local wheel cracks should immediately stop using and re-replacement of the grinding wheel, grinding wheel to avoid crushing injury accident.

drilling one or more of the cutting blade

Cars and main differences between drilling, drilling one or more of the cutting blade; drilling edge on the cutting speed varies between 0 and the actual cutting speed, that is, the cutting speed, the  Sanding disc lower the more severe cutting conditions nevertheless twist drill center feed is still great. Drill bit along the blade edge geometry varies greatly (cutting angle, clearance angle, wedge angle, tilt angle). Sharp chisel bit different levels according to the axial force on the drill bit has a significant impact; space inside the hole is closed, the discharge of cuttings from the borehole is greatly hindered or periodically under the control chip cooling lubricant circulation can this situation be improved.
If successfully exploited when turning on the measured data to simulate the drilling process, then all of these  standard abrasives challenges as well as on the chip with the twist drill pilot survey conducted difficulties encountered can get a better solution.In order to take into account in the analysis of the drill along the drill blade edge geometry of the blade changes, drilling can be divided into concentric sectors (see Figure 3). If simply assumed to be a sector of the cutting performance is constant, then from a range with the corresponding cutting edge geometry and the data in the test data, must also be translated into the drill holes. The cutting force is all holes on the sum of all the sectors.

the edge of the grinding wheel surface to settle

1, the edge of the grinding wheel surface to settle.
Grinding bit before the first bit of the main cutting edge of the grinding wheel surface placed on a level surface, that is, to ensure the contact edge grinding surface, the blade to be ground. This is the bit position of the first step and the wheel relative to the position and then slowly to gracefully by grinding the surface.
2, the bit axis oblique to the  abrasive roll surface with the wheel angle of 60 °.
This angle is the angle of the drill front, then the angle is wrong, will directly affect the size and angle drill main cutting edge shape and chisel edge angle. This is the bit line and the wheel axis of the positional relationship between the surface, taking the line 60 °, this angle is generally more accurate to see. Here we note that  sanding paper roll the relative levels before the drill grinding and angular positions, both overall plans, do not neglect to settle edge gracefully degree angle, or the angle to gracefully while ignoring settle edge.
3, followed by the grinding edge back.
After contacting wheel edge, from the cutting edge to the back of the main mill, that is from the drill edge first came into contact with wheels, then slowly down along the entire flank wear. Drill cut can gently touch wheel, the first for a smaller amount of sharpening, and  cutting disc observe the spark uniformity, timely adjustment of hand size of the pressure, but also pay attention to the drill bit cool, not be allowed to wear too much, causing discoloration edge , and to the edge annealing. Discovery edge temperature is high, the drill should be promptly cooled.
4 blade to swing up and down the drill, drill the tail can not be warped.
This is a standard drill grinding operation, the main cutting edge to swing up and down on the wheel, that is, the front of the hand grip drill evenly to the surface of the wheel of the drill bit up and down. The hand grip part can not swing, but also to prevent the rear handle to the upturned, that can not drill the tail above the horizontal centerline Gao Qiao Yu wheel, otherwise it would blunt edge

abrasive grinding

Our country is beginning in the mid-sixties to carry out trial with artificial diamonds. International sixties artificial diamond production value of 10 million carats, today, Chinese artificial diamond output value reached 50 million karats (about 10,000 tons), and the whole international artificial diamond output value incalculable, and foremost among these  nonwoven belt artificial diamond used in industry. Artificial diamond and its products greatly facilitated the conduct of special usefulness grinding needs, artificial diamond from resource constraints, production costs since the day from the creation continue to lower species is gradually increased, the quality continues to progress, so on the great pioneering the use of artificial diamond abrasive vision. Not only in the abrasive, and the over use of the coated abrasives, such as dental diamond belt, precision instrument with diamond belt and so on.
Superabrasive CBN is another type, its function and artificial diamond abrasive similar, but also has some common than the artificial diamond strengths, such as heat better than artificial diamond. CBN launched later than the artificial diamond, the Department of trial seminars around  grinding wheel china the 1970s, and it can be said comer. CBN in the early 90s all large international industrial production to carry out a larger state, such as the former Soviet Union, the CBN has been carried out to a value of more than 50 million carats. CBN also in our late eighties or early nineties and carry out new product trial, but slower, its origins lie in technology and skills are far behind other industrial prosperous nation, and thus its implementation and  abrasive tools use must also have been bound.
Artificial diamond and cubic boron nitride abrasive. In carrying out artificial diamond and cubic boron nitride abrasive superhard abrasive together, these two super abrasive abrasive has also been carried out accordingly, artificial diamond abrasive to carry out faster. To the current, artificial diamond abrasive developed into a relatively intact, sophisticated and self-contained processing skill areas. Artificial diamond abrasive products such as electroplated diamond saw blades cut the inner circle, needle files, grinding, artificial diamond saw blades, blade structure, artificial diamond dressing pen, stone with diamond abrasive, diamond cylindrical grinding wheel, processing of iron oxide the use of diamond abrasive.

To our abrasives and international synchronization

This stage presents a new feature that followed the industry carried out by increasing the hardness of processed data, the original can not be satisfied with simple Abrasives need to carry out, so we will start to seek higher hardness abrasive material to do , has found a natural corundum, topaz, natural diamond and other information we put these natural data broken and clay mixed, calcined abrasive has a certain shape, in  order grinding disc  to be processed.
It can be said, began to use natural abrasives higher hardness is characteristic throughout this period. However, the value of all natural abrasives are not set, and the limited number of inconsistent quality, all of this is difficult to maintain a stable and rapid Mengjin industrial limitations become increasingly unsuited.
(Three) the third stage (the late nineteenth century to the early twentieth century)
The primary characteristic of this cutting and grinding disc  period is to present and apply artificial abrasive.
Since then, a large number of industries had started to compare price and quality and unmatched stability, output has steadily added artificial abrasive grinding stuff, and then push the data processed by grinding quick growth, of course, from the other hand to carry out grinding also promotes agility carry abrasives. This stage can be divided into the following periods:
, 1900 -1920 years:
During this period, showing the outside of everything except centerless grinder grinder, which promotes automotive, military, industrial electrodes greatly carried out.
2,1920 -1949 years ago:
In the 1920s the future, grinding machinery began to carry out by the hydraulic mechanical transmission, the grinding process is still done in partial automation, during this period, centerless grinding portraying success, began to put into use, this period is a very important representation of the discussion is about the grinding process, the experience from the beginning into the theoretical analysis approach. That the theory of the beginning of the discussion on the grinding.
3,1950 to 1980 years ago:
Internationally, the United Kingdom, France, the DC wheel  United States, Germany, Italy and the former Soviet Union carried out throughout the artificial abrasive seminars and conducted industrial production, and thus abrasive and grinding tools have made great progress over the previous period, the industrial boom State machine grinder proportion reached 10% of total, and is constantly increasing.
In China, an important group of influential projects put into operation, such as the second Grinding Wheel, Grinding Wheel third and fourth Grinding Wheel, Grinding Wheel Fifth, Sixth Grinding Wheel, Grinding Wheel VII put into operation. Said clarity of career abrasives are constantly launching grow.
4, before and after the reform and opening up:
To our abrasives and international synchronization, in the following aspects in the discussion or improve the precision grinding progress ①, ② progressive grinding degree of automation, ③ high-speed grinding, ④ high accuracy and high-quality finish, ⑤ strong grinding, ⑥ wide and multi-wheel grinding wheel, ⑦ progressive grinding machining production rate, ⑧ trial conducted special grinding or molding grinding, ⑨ superhard abrasives. Hard data such as artificial diamond and cubic boron nitride is currently being called the world's most hard substances, Mohs hardness of 10.

Abrasives manufacturing process are

assign material, mixing, forming, heat treatment, machining and inspection. With different binders, manufacturing processes are not the same. Mainly vitrified bond-pressure method, the abrasive and binding agent according to the weight ratio of formulation weighed, placed in the standard abrasives  mixer are mixed evenly into a metal mold in the press forming of rough grinding. Blank firing kiln dried and then into the firing temperature is generally about 1300 ℃. When the binding agent is low melting point welded shut, the firing temperature is lower than 1000 ℃. Then the provisions of size and shape precision machining, final inspection products.
Resin bonded abrasives are generally at room temperature in the press forming, there is also the condition of heating under sandpaper  pressurized hot pressing process with heating. After forming in the hardening furnace hardening. Phenolic resin as binding agent, the curing temperature is 180 ~ 200 ℃.
Rubber bonded abrasives mainly used for mixing roller machine and rolled into thin slices, then die cutter punching molding; also some with loose material, the inner mold into the press molding. After the vulcanization molding vulcanization tank, a temperature of 165 ~ 180 ℃.
Metal bonded abrasives manufacturing process has wide belt  two kinds of powder metallurgy and electroplating method, mainly for superabrasive abrasive. Bronze powder metallurgy method as the binding agent used after mixing at room temperature or under hot pressure molding, and sintering process. Plating with nickel or nickel-cobalt alloy as the metal plating, the plating process according to the abrasive bonded to a substrate, made of abrasive.

Sandpaper belt grinding very safe

Because the quality of sandpaper belt itself is very light, even if the risk of cracking would not be hurt. 3M sandpaper belt grinding wheel did not like the sand off grim, especially when grinding wheel china  dry grinding, abrasive dust constitutes a major piece of information is processed, it is simple to recover and control dust. Because use rubber touch wheel, sandpaper belt grinding wheel will not be as rigid as the impact of the formation of the workpiece, so the processing noise is very small, generally <70dB. Thus, from an environmental viewpoint of a 3M sandpaper belt grinding is also very worthy.
Sandpaper belt grinding process agility big, strong habit. Mainly in:
Abrasive belt grinding can be shop roll  very easily used for plane, the inner, outer and messy surface grinding. Depicts a sandpaper belt grinding device as a function of the components can be mounted on the lathe progress driving after grinding can also be mounted on the planer on the use, together with the variety can also be portrayed as a dedicated grinder. Use sandpaper belt grinding this characteristic can be easily machined parts are difficult to deal with, such as long, oversized shaft and flat parts precision machining.
Sandpaper belt substrate, abrasives, adhesives have a great cutting disc  selection of size, can get used to a variety of useful needs. Sandpaper belt particle size, length and width of a variety of specifications, and a roll, ring and other means are available.
For the same work, 3M sandpaper belt grinding can choose a variety of different grinding methods and process layout for processing.
Sandpaper belt grinding extreme wide-scale use of 3M sandpaper belt grinding superior functionality and sensitive process characteristics resolutions that it has extremely widely used scale, from everyday life to industrial production industries, 3M sandpaper belt grinding cut almost all areas extensively. Its use of diverse, broad scale is any other kind of processing methods can not be compared.

the workpiece material to be ground, grinding efficiency and surface quality

Wheel selection was excellent, easy to fall off blunt abrasive, grinding wheel easy to plug, grinding heat increases, the workpiece easily burn, grinding efficiency is low, affecting the surface abrasive sanding belt  quality; wheel selected too soft, abrasive when he was still sharp fall , increasing the grinding loss, easy to lose the correct geometry, the impact accuracy of the workpiece. Therefore, the choice should be appropriate grinding wheel hardness, but also according to the grinding wheel and workpiece size, shape of the workpiece, grinding way, cooling, grinding wheel binder type and other factors to consider.
 Wheel hardness selection principle for the following reference:
 a. grinding of soft materials to  standard abrasives choose harder grinding wheel, grinding hard materials will have to choose soft grinding wheel;
 b. grinding soft and toughness of non-ferrous metals, the hardness to be elected was softer;
 c. grinding material of poor thermal conductivity should be selected softer wheel;
d. than the circumference roloc disc  of end mill grinding, the grinding wheel hardness should choose softer;
 e. the same grinding conditions, with resin bonded grinding wheel vitrified wheel than the hardness of 1-2 small higher grade;
f. grinding wheel rotational speed is high, the hardness of the optional soft wheel 1 to 2 small stage;
 g. the cooling liquid than dry grinding the grinding wheel hardness grade 1 to 2 hours.

resolution grinding disc material roughing and finishing

Crystal film polishing step is to cut a good crystal film in a step for further processing, are prepared guarantee crystal film quality of the main link. This step in the processing of crystal pieces in the process, for different crystals, sometimes using coarse and fine grinding two file belt  processes. Why do as promised? This is because, grinding crystal films, the number of revolutions grinders, pressure and particle size abrasive material selection of the size of the grinding result is a direct relationship.
The size of the abrasive particle velocity and grinding disc (under the condition of the pressure necessary) proportional to the inverse grinding quality. This means that the degree of abrasive particles, grinding the crystal film on the fast speed, it is to layer rate. But because the degree of abrasive particles will form a consistent appearance of the Bonded abrasives  crystal particle size of sheet size of a mechanical damage layer of coarse crystal film appearance quality. Instead, we choose the small particle size of the abrasive, surface quality crystal film is obtained because of improved small particle size. However, the amount of grinding crystal film will drop, to the low level.
To get a good slice of the crystal quality of the film, but also progress in production efficiency, it is necessary to choose the appropriate abrasive, reasonable grinding. As promised, took place two coarse and fine grinding process concept. Coarse grinding process, select a reasonable, larger particles of abrasive, grinding progress to the  metal cutting wheel speed of the crystal piece, adding to the layer rate is the primary goal. Grinding process, the rational choice of smaller particles of abrasive, progressive improvement in the appearance of the crystal piece, do prepare for the polishing process, the primary objective of this process. 3M abrasive coarse and fine grinding on both devices to isolate the operation is complete, to prevent abrasive infect each other, which is to be strictly enforced.

Several abrasive polishing method

1, the mechanical polishing: mechanical polishing is by plastic deformation of the cutting surface of the material to be removed after polishing to obtain a smooth surface protrusions polishing method is Sanding Sheets  generally used Whetstone bar, wool wheel, sandpaper, belt, nylon wheel, so as to manual operation of Lord, special parts such as rotary body surface, you can use the turntable and other auxiliary tools, high surface quality requirements can be thrown over lapping method. Superfinishing throw is to use a special abrasive abrasive, abrasive polishing containing liquid, pressed on the surface of the workpiece to be machined for high-speed rotation. A variety of polishing method in the highest. Optical lens mold often use sandpaper roll  this method.2, chemical polishing: chemical polishing is to make the surface material in the chemical medium microscopic concave portion projecting some of the more preferential dissolution, resulting in a smooth surface. The main advantages of this approach does not require complicated apparatus, the complex shape of the workpiece can be polished, can be velcro disc  polished simultaneously many parts, and high efficiency. The core problem is that the chemical polishing slurry preparation.
3, electrolytic polishing: electrolytic polishing and chemical polishing the same basic principles, i.e. the material surface by selective dissolution of small projecting portion, the surface smooth. Compared with chemical polishing, can eliminate the impact of the cathodic reaction is better. Electrochemical polishing process of leveling the macro and micro-leveling.