焊接残余应力引起铣削加工变形的研究  

Effect of Welding Residual Stress on Milling Deformation

作　　者：朱伟军[1] 卢文壮[1] 刘杨[1] 董平和[1] 杨波[2] 左敦稳[1] 

机构地区：[1]南京航空航天大学机电学院 [2]75160部队

出　　处：《机械制造与自动化》2013年第1期39-43,共5页Machine Building & Automation

基　　金：国家自然科学基金项目资助(No.51075211);教育部博士点基金项目资助(No.20113218110018);南京航空航天大学基本科研业务费专项科研项目资助(No.NP2011016)

摘　　要：焊接过程会产生残余应力,铣削加工后焊接残余应力释放和重新分布对铣削变形产生很大影响。为了研究残余应力释放和重新分布规律,采用有限元方法以最小焊接残余应力作为初始应力对铣削加工进行了数值模拟,获得了焊接试验件铣削加工残余应力和变形,并对焊接残余应力释放和重新分布以及加工变形进行了分析。Welding residual stress is caused in welding. Its release and redistribution greatly affect milling deformation during milling process. In order to study the law of its release and redistribution, the milling finite element modeling of welding workpiece is established. The original residual stress suggested in the milling finite element analysis is obtained by using minimum welding residual stress and them the milling residual stress and deformation of welding workpiece are gained. At last, its release and redistribution and milling deformation are analyzed.

关 键 词：重型运输车车车架 铣削 残余应力 加工变形 

分 类 号：TG54[金属学及工艺—金属切削加工及机床]