PVD硬质合金刀具加工Nimonic C-263合金表面粗糙度的建模和分析

摘要

The effects of the cutting parameters(cutting speed,feed rate and depth of cut)on the surface roughness in machining the Nimonic C-263 alloy were investigated.The experiments were conducted using Taguchi's experimental design.The effect of cutting parameters on surface roughness was evaluated and the optimum cutting conditions for minimizing the surface roughness were determined.A second order model was established between the cutting parameters and surface roughness,using the response surface methodology.The experimental results revealed that among the parameters considered,the feed rate is the most significant which influences the surface roughness,followed by the cutting speed.The predicted values and measured values are fairly close,which indicates that the developed model can be effectively used to predict the surface roughness in machining the Nimonic C-263 alloy.The predicted values are validated using the additive law.%研究了加工Nimonic C-263合金时,切削参数(切削速度、给进速度、切削深度等)对表面粗糙度的影响.采用正交方法设计实验.评估了切削参数对表面粗糙度的影响,获得最小粗糙度的最优切削条件.采用响应面方法建立了切削参数和表面粗糙度的二次多项式模型.实验结果表明:在所考察的切削参数中,给进速度对表面粗糙度的影响最为显著,其次是切削速度.模型预测结果与实际结果吻合较好,表明所建立的模型能够用来有效地预测加工Ninonic C-263合金时的表面粗糙度.最后,对预测结果用加成定律进行了验证.