What are the requirements for diamond ceramic grinding wheels for ceramics?
What kind of diamond ceramic grinding wheel is needed to better meet the needs of ceramics? According to the introduction of the company that produces and sells diamond ceramic grinding wheels, the factors that determine the quality of diamond ceramic grinding wheels can be summarized from the two aspects of diamond abrasive and bond design:
1. Diamond abrasive
First of all, the diamond abrasive with cutting effect is uniformly distributed on the working surface of the grinding wheel. From the perspective of improving the holding force of the bond on the diamond abrasive, the crystal shape of the abrasive should be as irregular as possible, and the surface is rough as well. In addition, the thickness of diamond will directly affect the surface roughness of the workpiece, grinding efficiency and wear of the grinding tool. Therefore, under the condition of meeting the requirements of the machining workpiece, the coarse particle size should be selected as far as possible to improve the grinding efficiency and reduce the loss of the die.
2. Binding agent design
The second is responsible for bonding the abrasive ceramic binder. Due to the poor thermal stability of diamond, it will be oxidized in the air above 700℃, and the compressive strength decreases obviously after 900℃ heating in the protective atmosphere, so the sintering temperature of ceramic binder can not be too high. In addition, the bonding strength of the bond should meet the working strength requirements of the grinding wheel, the expansion coefficient should match the thermal expansion coefficient of the abrasive, and the thermal conductivity should not be too poor.
Besides, emphasize the most important thing is to bond of diamond abrasive holding force must be strong enough for diamond itself compressive ability is very strong, long service life, so in order to give full play to the advantages of diamond abrasive, reduce cost and improve the diamond abrasive concentration in the grinding wheel, reasonable binder formula design is critical.