陶瓷基复合材料铣削力优化及刀具磨损研究

Research on Milling Force Optimization and Tool Wear of Ceramic Matrix Composites

SiC_(f)/SiC陶瓷基复合材料具有硬度高和耐磨损等特点,在切削加工时存在切削力大和刀具磨损严重等问题。采用正交试验法对SiC_(f)/SiC陶瓷基复合材料开展了铣削试验,使用极差法对铣削力进行分析,通过分析铣削加工参数对铣削力的影响规律,得出铣削深度对铣削力的影响最大。同时,分析铣削深度对刀具磨损的影响结果表明,随着铣削深度的增加,单位时间内刀具铣削材料体积增加,引起铣削力增大和铣削区域温度上升,导致刀具磨损增加。给出了以铣削力最小和刀具磨损量最低为优化目标的各个工艺参数,为后续的SiC_(f)/SiC陶瓷基复合材料铣削加工提供参考。

Because SiC_(f)/SiC ceramic matrix composites have the characteristics of high hardness and wear resistance,there are problems such as high cutting force and severe tool wear during cutting.This paper uses the orthogonal experiment method to carry out the milling experiment on the SiC_(f)/SiC ceramic matrix composite material,and uses the range method to analyze the milling force,by analyzing the influence of the milling processing parameters on the milling force,it is concluded that the milling depth has the greatest influence on the milling force.The influence of milling depth on tool wear is analyzed,the results show that with the increase of milling depth,the volume of tool milling material per unit time increases,which causes the increase of milling force and the temperature of the milling area,leads to the increase of tool wear.The minimum milling force and the minimum tool wear are presented as the optimization goals of each process parameter,which provides experience for the subsequent milling of SiC_(f)/SiC ceramic matrix composites.