Optimization of processing parameters during electrical discharge diamond grindingof RB-SiC ceramics based on grey relational theory

The electrical discharge diamond grinding tests of RB-SiC ceramics were performed. The influence of wheel parameters, grinding parameters and discharge parameters on surface roughness, material removal rate, wheel wear rate and normal grinding force were analyzed. The results indicated that electrical discharge diamond grinding could effectively improve the material removal rate and reduce the normal grinding force compared with the traditional grinding. However, too high discharge energy would result in serious wheel wear and reduce the material removal rate and ground surface quality. The process parameters were optimized based on grey relational theory and orthogonal experiment, and verification experiments were carried out to verify the optimization results. The results demonstrated that the optimized processing parameters could effectively improve the material removal rate and ground surface quality, and reduce the normal grinding force and wheel wear rate.