Finite Element Analysis of Precision Ultrasonic Assisted Turning for Plastic Material

摘要

Precision ultrasonically assisted turning (UAT) is a promising machining technology, where high frequency vibration (about f = 20kHz) with an amplitude (about a = 10μm ) is superimposed on the movement of the cutting tool. In this paper, the ultrasonically assisted orthogonal metal cutting process under plane strain conditions is analyzed with elastic-plastic nonlinear finite element method. A detailed analysis of cutting for a single cycle of ultrasonic vibration is carried out, accounting for the friction contact between a cutter and workpiece. Simulation results show the stress distribution in the process zone. The reason of decreasing cutting force in the ultrasonic turning is explained.