轴向超声振动辅助铣削TiB2/7050Al复合材料残余应力试验研究  

Experimental Investigation on Residual Stress of Axial Ultrasonic Vibration-assisted Milling TiB2/7050Al Composites

作　　者：李俊辰 汪文虎[1] 蒋睿嵩 刘晓芬 熊一峰[1] 单晨伟[1] LI Junchen;WANG Wenhu;JIANG Ruisong;LIU Xiaofen;XIONG Yifeng;SHAN Chenwei(Engineering Research Center of Advanced Manufacturing Technology for Aero Engine of Ministry of Education,Key Laboratory of High Performance Manufacturing for Aero Engine of Ministry of Industry and Information Technology,Northwestern Polytechnical University,Xi′an 710072,China;School of Aeronautics and Astronautics,Sichuan University,Chengdu 610065,China)

机构地区：[1]西北工业大学,航空发动机高性能制造工业和信息化部重点实验室,航空发动机先进制造技术教育部工程研究中心,陕西西安710072 [2]四川大学空天科学与工程学院,四川成都610065

出　　处：《电加工与模具》2021年第1期50-54,63,共6页Electromachining & Mould

基　　金：国家自然科学基金资助项目(51775443);国家科技重大专项(2017-VII-0015-0111);中国博士后科学基金资助项目(2020M683569)。

摘　　要：针对TiB2颗粒增强铝基复合材料可加工性差、切削温度高、刀具磨损严重等问题,开展TiB2/7050Al复合材料轴向超声振动辅助铣削残余应力试验,研究各加工参数对超声振动辅助铣削表面及亚表层残余应力的影响规律,并分析力热耦合作用对超声振动辅助铣削残余应力的作用机制。研究表明:TiB2/7050Al复合材料超声振动辅助铣削表面残余应力均为残余压应力,且残余压应力随每齿进给量、切削速度的增加而减小,而随着切削深度及超声频率的增加呈现先增大后减小的趋势;工件亚表层残余应力影响层厚度为90~120μm,且未观测到明显的加工硬化现象。In order to solve the problems of poor machinability,high cutting temperature and severe tool wear of TiB2 particle-reinforced aluminum matrix composites,an axial ultrasonic vibration-assisted milling method of TiB2/7050Al composites was carried out.The effects of processing parameter on residual stress of the surface and subsurface layer were studied,and the mechanism of force-heat coupling effect on the residual stress of ultrasonic vibration-assisted milling was analyzed.Research showed that the residual stress on the surface of TiB2/7050Al composite with ultrasonic vibration-assisted milling is all compressive stress,and it decreases with the increase of feed rate and cutting speed,and presents a trend of increasing first and then decreasing with the increase of cutting depth and ultrasonic frequency.Meanwhile,the thickness of the residual stress in subsurface layer of the workpiece is about 90~120μm,and no obvious hardening was observed.

关 键 词：TIB2颗粒 超声振动辅助铣削 残余应力 

分 类 号：TG663[金属学及工艺—金属切削加工及机床]