Application of Vitrified Bond Diamond Grinding Wheel

Vitrified bond diamond grinding wheel has the common characteristics of diamond and vitrified bond. 

Compared with ordinary corundum and silicon carbide grinding wheels, it has stronger grinding force, lower temperature during grinding, and less wear of the grinding wheel; 

It can adapt to various coolants The role of the grinding wheel; the shape retention of the grinding wheel is good during grinding, and the precision of the workpiece is high; there are more pores in the grinding wheel, which is conducive to chip removal and heat dissipation during grinding, and is not easy to block and burn the workpiece; 

The self-sharpening of the grinding wheel It is better, the time between trimming is long, and trimming is easier. Therefore, the use of vitrified bond diamond grinding wheels in some developed countries abroad is increasing.

With the development of science and technology, new materials continue to grow, and machining continues to develop in the direction of high quality, high precision, high efficiency, and automation. The application range of vitrified bonded diamond grinding wheels is becoming wider and wider, and the amount is increasing. 

Mainly used in rough grinding, fine grinding and ultra-fine grinding of diamond tools, cubic boron nitride tools, hard alloys and new engineering ceramic materials, cermet, cast iron, ceramics, gemstones, ferrite, concrete, refractory materials, fibers Grinding and machining of reinforced plastics.

Diamond tools are mainly concentrated in PCD composite sheets, chemical vapor deposition (CVD) coated tools and single crystal diamond tools. 

Choosing reasonable process parameters, vitrified bonded diamond grinding wheel grinds single crystal diamond, the grinding efficiency is higher than that of metal bonded grinding wheel, the wear ratio is very small, and the processing cost is low. 

Therefore, using vitrified bonded grinding wheel to grind single crystal diamond can greatly improve the broken day grinding efficiency. In terms of grinding PCD tools, because the resin bond is soft, it is easy to deform during grinding, and cannot effectively grind PCD tools; 

The metal bond has poor self-sharpening of the grinding wheel due to its strong binding ability to abrasive grains, and the grinding efficiency Low, and the metal bonded grinding wheel will cause the most serious damage to the edge of the PCD tool; 

Comprehensive grinding efficiency, grinding wheel durability and processing quality of the workpiece surface, vitrified bonded diamond grinding wheel is the most suitable choice for grinding PCD tools.

Fine-grained vitrified bonded diamond grinding wheels are used for precision dimensioning of chromium hardened steel bearing rollers.

Vitrified bonded diamond grinding wheels are used for precision machining of automobiles, tractor crankshafts, and hydraulic pump gear necks.

Vitrified bonded diamond grinding wheels with good toughness are used for rough grinding and fine grinding of TV picture tube fluorescent screens. 

Using vitrified bonded diamond grinding wheel to process high-performance silicon wafers for integrated circuits has high processing precision and low processing roughness, and the silicon wafers after grinding have no metal ion pollution, and the qualified rate of processed products is high.

Due to its own excellent properties, such as high hardness, high wear resistance, high temperature resistance, corrosion resistance, high stiffness-to-weight ratio, low density and strong chemical inertness, new engineering ceramic materials make them widely used in science and industry.

Application is increasingly widespread. For example, MgO single crystals are widely used in high-temperature superconductors, thin-film substrates, and laser parts. The use of these new materials is brittle and prone to cracks during processing, which is often accompanied by many processing problems. 

Diamond is the hardest material in nature, and the grinding wheel made of it solves the processing problems of high hardness materials such as glass and ceramics. 

For newly developed engineering ceramics such as silicon nitride, when grinding with a resin or metal bonded diamond grinding wheel, it is easy to cause insufficient holding force of the bond on the abrasive grains and increased wear; or the toughness of the bond is too large, and the grinding wheel There are few pores, the grinding force is reduced, and it is difficult to trim the grinding wheel after it is blunt, which makes the whole grinding process more difficult. 

The vitrified bond is made of ceramic or glass. The bond has good rigidity and high temperature resistance. It is suitable for fine finishing during grinding and will not cause the knife to give up. Moreover, the vitrified bond has strong adhesion to abrasive grains, good edge and corner retention performance, and can perform high-precision grinding. 

In addition, the hardness and porosity of the vitrified bonded diamond grinding wheel can be adjusted during the manufacturing process, which is beneficial to the improvement of the grinding performance. Through reasonable proportioning and production control, no deformation will occur, which is also the reason for the high machining accuracy of the grinding wheel reason.

In summary, when grinding with vitrified bond diamond grinding wheel, it has the following advantages;

(1) High grinding efficiency;

(2) High wear resistance: the grinding wheel has high wear resistance and less consumption of abrasive grains, especially when grinding very hard and brittle workpieces;

(3) The grinding force is small, and the grinding temperature is low;

(4) The ground workpiece has high precision, good surface quality, and good shape retention of the workpiece.

Therefore, the vitrified bond diamond grinding wheel has more and more obvious advantages in the grinding of some special materials such as ceramics, and has a good prospect in the development of diamond grinding wheels. 

It is considered to be a high-performance grinding wheel with high speed, high efficiency, high precision, low grinding cost, and low environmental pollution. It has more and more applications and is a hot spot in the research and development of grinding tools in various countries in the world.