EXPERIMENT INVESTIGATION ON HIGH-SPEED GRINDING OF K9 OPTICAL GLASS

K9 glass is a kind of high performance optical material that is widely used in aeronautics and astronautics. However, the requirement of ground surface roughness is very strict and the grinding cost is very high. In order to solve the problem and take modern grinding theory into account, the high-speed grinding is greatly improved to solve the K9 grinding problem. Experiment research on high-speed grinding of K9 glass is carried out by using monolayer brazed diamond grinding wheel in the paper. The surface topography of grinding wheel and ground surface before and after dressing are observed. The surface roughness, the surface roughness ratio Rz/Ra and the ratio of normal and parallel Ra direction are measured. The results show that with the increase of grinding speed, the surface defects and surface roughness are reduced; the continuity of surface texture is improved, and the cutting process tends to be ductile. According to theoretical analysis, it shows that the grinding surface roughness changes with the grinding process parameters, and the performance of K9 glass material is inversely proportional to the grinding energy.