Abstract: The effects of process parameters on the surface roughness， surface morphology and wear of the grinding wheel were studied by the orthogonal test after quartz glass was treated by laser heat assisted grinding. The results showed that laser heat-assisted grinding can improve the critical grinding depth， the surface grinding quality and work efficiency of quartz glass. The laser power has the greatest influence on the roughness of laser-assisted grinding， but there is no linear relationship. The optimal laser power is 175W， and the corresponding roughness is 0.262. With the aid of laser， the brittleness of glass decreases and the plasticity increases during the experiment， which realizes the plastic domain grinding of quartz glass， reduces the wear of the grinding wheel and decreases the peeling pit of the grinding surface.

Key words: laser heat-assistance, quartz glass, surface grinding quality, plastic zone grinding, grinding wheel wear