SiC_p/Al复合材料高速铣削切削力模型建立  

High-Speed Milling-Force Model for SiC_p /Al Composites

作　　者：边卫亮[1] 傅玉灿[1] 徐九华[1] 张帅[1] 葛英飞[2] 

机构地区：[1]南京航空航天大学 [2]南京工程学院

出　　处：《航空制造技术》2012年第3期92-95,共4页Aeronautical Manufacturing Technology

基　　金：国家高技术发展研究计划(863)(2009AA04Z116);江苏省高校自然基金(09KJB460004);南京工程学院科研启动基金(No.KXJ08024)资助

摘　　要：使用聚晶金刚石(PCD)刀具并采用正交试验设计法,对含不同体分比的碳化硅颗粒增强铝基复合材料(SiCp/2009Al)进行高速铣削试验。在测量切削力和切屑厚度的基础上,建立了剪切角、剪切应力和摩擦角的预测模型,并结合金属切削基本理论公式建立了切削力的预测模型。该模型包含铣削速度、每齿进给量、径向切宽、增强颗粒体分比等重要参数,模型对进给方向最大铣削力预测值的平均误差为5.9%,对铣刀径向切深方向最大铣削力预测值的平均误差为9.2%,皆高于普通经验公式的预测精度,从而可对SiCp/2009Al复合材料高速铣削时的铣削力进行有效预测。Highspeed milling tests are carried out on the SiCp/Al composites with different volume fraction using PCD tools at dry machining condition by the method of orthogonal experiments design. Prediction model of shear angle, shear stress and frictional angle are established on the foundation of cutting forces and chip thickness measuring. The prediction model of millingforces is also established according to the basic theory of metal cutting formula. This model contains the important parameters, such as cutting speed, feed rate, radial cut- ting width and volume fraction of SiC particle. Using this model, mean error of predictive value of maximum cutting force in the feed direction and in the radial cutting depth direction are 5.9% and 9.2%, respectively. The prediction accuracy is considerably higher than that of the traditional empirical formulas. Therefore, the newly established model can accurately predict the cutting forces when high- speed milling SiCp/2009Al composites.

关 键 词：颗粒增强铝基复合材料 高速铣削 铣削力模型 PCD刀具 

分 类 号：TG54[金属学及工艺—金属切削加工及机床]