扭杆表面材料本构关系及滚压仿真分析研究  

Research on Constitutional Relationship of Torsion Bar Surface Material and Simulation Analysis of Rolling

作　　者：高慧峰[1] 吕彩琴[1] 刘思蓉[1] 张可[1] 

机构地区：[1]中北大学机械与动力工程学院,山西太原030051

出　　处：《热加工工艺》2017年第24期170-174,共5页Hot Working Technology

摘　　要：扭杆表面的应力状态是扭杆使用寿命以及运行可靠性的关键因素,滚压工艺参数对扭杆表面应力状态有重要的影响。通过对扭杆建立材料本构关系模型,基于此本构关系模型,对三维滚压过程进行了有限元仿真分析,得到压入量、工件转速和进给速度对表面轴向残余应力的影响规律。结果表明:工件转速和压入量的增加都会增大扭杆表面轴向残余应力;进给速度的增加使扭杆表面轴向残余应力先增大后减小。The stress state of torsion bar surface is a key factor of its service life and operation reliability. The rolling technique parameters have important effects on the stress state of the torsion bar. By constructing material constitutional relationship model for the torsion bar, based on the constitutional relationship model, finite element simulation analysis for 3D rolling process was carried out. And then, the regularity of the effect of press amount, workpiece rotating speed and feed speed on the surface axial residual stress was obtained. The results show that the axial residual stress of the torsion bar surface increases with the increase of workpiece rotating speed and press amount. The axial residual stress of the torsion bar surface firstly increases and then decreases with the increase of feeding speed.

关 键 词：扭杆 滚压 材料本构关系 有限元仿真 表面残余应力 

分 类 号：TG174[金属学及工艺—金属表面处理]