弹簧钢喷丸成形残余应力及回弹弧高有限元模拟  

Finite Element Simulation of Residual Stress and Arc-height of Shot Peening Forming Spring Steel

作　　者：郑淑琴[1] 李晓英[1] Zheng Shuqin;Li Xiaoying(Changjiang Polytechnic,Wuhan 430074,China)

机构地区：[1]长江职业学院,武汉430074

出　　处：《煤矿机械》2019年第4期81-84,共4页Coal Mine Machinery

基　　金：湖北技能型人才培养研究中心项目(2018JB010)

摘　　要：针对实际生产中弹簧钢的喷丸成形过程进行了有限元建模。以随机弹丸的形式模拟弹丸的动态显示冲击,同时引入材料阻尼以减少振荡对弹丸连续冲击的影响,并以静力通用分析模拟了工件回弹过程。分析结果表明,最大的等效塑性变形区位于表层,随着速度的增大等效塑性应变不断增大,并且最大残余应力所在的深度也是随入射速度的增大而增大。随着弹丸数量的增大,试片回弹弧高增大,但是回弹高度存在一个饱和点,其饱和回弹的弧高度约为1.17 mm。Finite element modeling of shot peening process of spring steel in actual production was carried out. The dynamic impingement of the shots was simulated in the form of random shot, and the material damping was introduced to reduce the continuous impact of the shot. The springback process of workpiece was simulated by static general analysis. The results show that the maximum equivalent plastic deformation zone was located in the surface layer, and the equivalent plastic strain increases with the increase of impingement velocity, and the depth of the maximum residual stress also increases with the increase of incident velocity. As the number of shots increases, the rebound arc height of the specimen increases, but there is a saturation point at the rebound height, and the saturated point of the arc-height is about 1.17 mm.

关 键 词：60SI2MNA钢 喷丸成形 残余应力 弧高发展 

分 类 号：TG668[金属学及工艺—金属切削加工及机床]