WU Yuhou 1,2, SHA Yong 2, LI Songhua 1,2, SUN Jian 2, WANG Hao 2
(1. National-Local Joint Engineering Laboratory of NC Machining Equipment and Technology of High-Grade Stone, Shenyang Jianzhu University, Shenyang 110168, Liaoning, China; 2. School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, Liaoning, China)
Abstract: In order to achieve efficient and precise grinding, the influence of grinding force on the surface quality of silicon nitride ceramics and surface damage are investigated. Through theoretical analysis, a single factor experiment is performed on the basis of high-efficiency grinding, and the surface roughness is measured by a roughness meter and the surface topography is observed. The results show that the grinding force is related to the volume of the single abrasive removal material; the specific grinding energy is between 60-70 J/mm3 and the tangential grinding force is between 10-60 N, which is easy to obtain better surface quality. Increasing the grinding depth is more prone to cracking than increasing the linear speed of the grinding wheel and the feed rate of the workpiece. The grinding depth is between 5-15 μm for precision grinding of silicon nitride ceramics.
Key words: silicon nitride ceramic; grinding force; surface roughness; surface topography