切削中残余应力释放对工件加工变形影响研究  

Study on Machining Deformation Resulted by Residual Stress Releasing in Cutting

作　　者：刘胜永[1] 万晓航[2] 董兆伟[2] 

机构地区：[1]河北师范大学机械系,河北石家庄050031 [2]河北工业职业技术学院,河北石家庄050091

出　　处：《制造技术与机床》2007年第8期88-91,共4页Manufacturing Technology & Machine Tool

基　　金：河北省科技厅科研资助项目(05212105D);河北省教育厅科研资助项目(2002240)

摘　　要：为了研究加工过程中毛坯初始残余应力的释放对加工变形的影响,在弹塑性理论的基础上,建立了三维铣削仿真加工变形场的有限元分析模型,利用位移约束转换和"单元生死"技术仿真了加工过程中工件装夹和材料的去除。通过仿真数据与实验数据相比较,结果表明:工件毛坯残余应力在铣削加工过程中对称释放有利于减小工件加工后变形。In order to study the affects of residual stress releasing to the machining deformation, the 3 - D milling FEM analysis model is established in this paper based on the plastic -elastic method, which uses the element birth and death technique and the movement restriction to simulate the part fixing and material removal during the process. Compared the simulated data with that in the experimentation, it can be drawn that the machining deformation in the milling process reduced if the residual stress remaining in the rough cast is released symmetrically.

关 键 词：残余应力 加工变形 加工仿真 有限元 

分 类 号：TG404[金属学及工艺—焊接]