Abstract：The edge defects of SiCp / Al composites caused by vibration cutting were studied by finite element simulation analysis software,and the effects of an ultrasonic exciting method and cutting parameters were investigated in detail. The research results indicate that: the edges defects in ultrasonic vibration turning compared with those in common turning are improved. In addition,the ultrasonic assisted cutting along the Y direction can remarkably reduce edge defects,followed by the ultrasonic elliptical vibration cutting and ultrasonic assisted cutting in the X direction; with large cutting-depth,the excellent edge quality cannot be obtained easily in the vibration cutting; the influence of narrow changes of rake angles on the edge defects is not obvious in the ultrasonic assisted cutting along the Y direction; however,tool wear will lead to critical edge defects in the ultrasonic assisted cutting along the X direction.

Keyword：edge defect;vibration cutting;SiCp / Al composites;finite element;