Due to the influence of the performance of engineering ceramics, there are the following characteristics in the grinding process:

(1) The grinding wheel wear is large and the grinding ratio is small. The removal mechanism of engineering ceramics is brittle failure, which is different from that of grinding metals. Metal materials are removed by plastic deformation to produce continuous chips. Engineering ceramics are removed by brittle cracking and producing fine powdery chips. The pulverized chips can easily remove the bond from the grinding wheel, causing the diamond particles to fall off and speeding up the grinding wheel wear. The greater the fracture toughness of the grinding ceramic material, the greater the grinding force and the more serious the grinding wheel wear. This not only results in lower grinding efficiency, but also a smaller grinding ratio. The grinding ratio of ceramic grinding with diamond wheel is 1/30 of that of glass grinding.

(2) The grinding force is large and the grinding efficiency is low. When grinding ceramic materials, the ratio of tangential grinding force Fc to radial grinding force Ep is much smaller than that of steel (Fc/FP-0.3 ~ 0.5), generally Fc/Fp <0.1. Because the hardness of ceramic material is very high (HVl500 ~ 2800), the radial grinding force Fp when grinding it is large, acting on the grinding wheel
The force on the shaft is large, and the elastic deformation of the shaft increases accordingly, which is easy to produce vibration and affect the grinding of the workpiece surface
Quality, reduce grinding effect.

CBN grinding wheel is suitable for high-speed, ultra-high-speed grinding, and grinding sharp, small unit wear, grinding steel wear ratio can reach 4000-10000, equivalent to the ordinary high-speed grinding wheel 150-200 times, so the grinding efficiency is very high.

CBN grinding wheel has such advantages that it can not only improve the finishing level of key parts, but also improve product quality and production efficiency.

At present, the pillar industry of powder metallurgy is automobile industry. As powder metallurgy technology is a kind of material saving, energy saving, less investment, no pollution of metal forming process, has long received the attention of the automotive industry, Ford, GM, Toyota, Honda and so on have opened the powder metallurgy business divisions.

Exhibition Center from September 9 to 11. Moresuperhard has sent two representatives to Shenzhen International Convention and Exhibition Center to participate in the exhibition and exchange learning.

The theme of the exhibition focuses on advanced materials and innovative forming processes of injection molding and additive manufacturing, sharing cutting-edge MIM and AM technology application cases, and introducing 3D printing materials, processing technology and business opportunities of the industry in the 5G era. Forum to explore the research progress of high-performance ceramic substrate powder materials, the latest development of ceramic substrate preparation technology, the key bottlenecks of ceramic substrate and copper clad plate, the development of ceramic substrate application fields and packaging technology, the development of new opportunities for the development of ceramic substrate in the 5G era.

The cause of cutter back-off in grinding PCD tool arc with diamond grinding wheel：
（1）The grinding wheel is not sharp enough to reach the set grinding amount.
（2）Use a finer-grained grinding wheel, such as 1500#.
（3）Re-set the grinding parameters. Different parameters should be used when grinding the inserts back and arc.

Imported resin diamond grinding wheel has been used in ceramic artificial joint grinding, but there are some problems in the grinding process, such as workpiece burn, grinding immobility, poor surface accuracy, etc. The grinding of artificial joint head is carried out by installing ceramic diamond grinding wheel on ultra-precision grinding machine.