超声椭圆振动铣削钛合金切削力和残余应力分析

Analysis of Cutting Force and Residual Stress in Ultrasonic Elliptic Vibration Milling of Titanium Alloy

铣削工艺以其高表面加工质量在制造领域中占有一席之地。为了进一步提高铣削精度,引入椭圆振动进行辅助加工,分析铣削钛合金切削力和残余应力特性。研究结果表明:当增大附加幅值时,平均径向切割力呈不断下降,有利于强化超声波椭振铣削作用,使加工周期明显缩短,而平均切削力也随之减小。随着超声振幅增大,表面残余应力增加,表面残余应力由表面最大点随深度增大持续下降,获得了稳定表面残余应力。该研究为后续的超声椭圆振动铣削工艺优化奠定一定的理论基础。

Milling process has a place in the manufacturing field for its high surface processing quality.In order to improve milling precision,elliptic vibration was introduced to assist machining,and the cutting force and residual stress characteristics of milling titanium alloy were analyzed.The results show that the average radial cutting force decreases when the additional amplitude is increased,which is beneficial to strengthen the ultrasonic ellipsometer milling,shorten the machining cycle obviously,and decrease the average cutting force accordingly.With the increase of ultrasonic amplitude,the residual stress increases,and the surface residual stress decreases continuously from the maximum point of the surface with the increase of depth,and a stable surface residual stress is obtained.This study lays a theoretical foundation for the optimization of ultrasonic elliptic vibration milling process.