基于灰色关联理论的RB–SiC陶瓷电火花机械复合磨削工艺参数优化

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

开展反应烧结碳化硅陶瓷电火花机械复合磨削试验,分析砂轮参数、磨削参数以及放电参数对陶瓷表面粗糙度、材料去除率、砂轮磨损率以及法向磨削力的影响规律。结果表明:与普通磨削相比,电火花机械复合磨削能提高RB–SiC陶瓷的材料去除率,且有效降低磨削时的法向磨削力;但过高的放电能量会造成砂轮的严重磨损,导致材料去除率和磨削表面质量降低。基于灰色关联理论和正交试验对工艺参数进行优化,并开展试验对优化结果进行验证。结果表明:优化后的工艺参数能有效提高材料去除率和磨削表面质量,并降低法向磨削力和砂轮磨损率。

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.