超声波振动切削TC4钛合金的残余应力数值分析  

Numerical Analysis of Residual Stress for TC4 Caused by Ultrasonic Vibration Cutting

作　　者：杨万辉[1] 陈雷[1] 杨金发[1] 杨惠欣[1] 

机构地区：[1]中航工业沈阳黎明航空发动机(集团)有限责任公司

出　　处：《航空制造技术》2015年第15期36-38,41,共4页Aeronautical Manufacturing Technology

摘　　要：为研究超声波振动切削TC4钛合金产生的残余应力,利用三维热力耦合有限元模型对钛合金超声波振动切削和振动时效处理进行了数值模拟。超声波振动切削相比普通切削可有效降低平均切削力,但振动切削的瞬时冲击作用使工件表层产生分布梯度较大的残余应力。振动时效可在一定程度上降低和均化被切削工件的残余应力,并提高TC4钛合金工件的抗疲劳性能。In order to analyze the stress of TC4 titanium alloy caused by ultrasonic vibration cutting, the numerical simulation for ultrasonic vibration cutting and VSR is carried out using the 3D thermo-mechanical coupled finite element model. Ultrasonic vibration cutting can effectively reduce the average cutting force compared with the ordinary cutting, but the instantaneous impact of vibration cutting results in uneven residual stress on the surface of the workpiece. VSR can make the residual stress of the workpiece reduced and homogenized, and improve the anti-fatigue performance of TC4 titanium alloy workpiece to a certain degree.

关 键 词：超声波振动切削 残余应力 振动时效 抗疲劳 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程]