冷绕成形螺旋弹簧回弹理论及数值模拟  

Theory of springback and numerical simulation of helical springs after cold coiling

作　　者：王时龙[1] 雷松[1] 周杰[1] 萧红[1] 杨勇[1] 冯治恒[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030

出　　处：《中南大学学报（自然科学版）》2011年第2期373-378,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50775226);教育部科学技术研究重点项目(109129);国家杰出青年科学基金资助项目(50925518);重庆大学研究生科技创新基金资助项目(200911A1A0020318);重庆大学"211工程"三期创新人才培养计划建设项目(S-90106)

摘　　要：针对现有研究未考虑张力对螺旋弹簧成形及回弹影响的问题,建立受张力影响的螺旋弹簧成形及回弹理论;讨论当簧丝受弯矩和张力共同作用时,弯矩与簧丝横截面应力、张力与簧丝横截面应力、回弹比与张力的关系;通过大型非线性有限元分析软件ABAQUS 6.8实现不同张力下螺旋弹簧冷绕成形过程的数值模拟。理论计算与模拟结果均表明:张力不同会导致弹簧最终回弹量的不同;张力越大,簧丝在卸载时越容易保持成形时的形状,回弹量越小;实际生产弹簧时,在除张力外的其他参数不易改变的情况下,可通过增大或减小张力的方法来减小或增大回弹量。Since there is no research about the forming and springback of helical springs considering the influence of the tensile force,the theory of it was established.The relationships between the bending moment,tensile force and the stress within the cross-section of spring wire respectively along with the relationship between the ratio of springback and the tensile force were discussed by applying the bending moment and tensile force together.The forming process numerical simulations of helical springs at different tensile forces were carried out by employing the large non-linear finite element analytical software ABAQUS 6.8.The results show that the springback is different when applying different tensile forces during the winding process.The larger the tensile force is,the smaller the springback is.Under the condition,it is easier for the spring wire to keep the shape being formed.For the helical springs in the course of being cold-coiled,when the other parameters are not easy to be altered except the tensile force,it is capable of increasing or decreasing it to decrease or increase the springback,respectively.

关 键 词：螺旋弹簧 簧丝 成形 回弹理论 张力 数值模拟 

分 类 号：TH135[机械工程—机械制造及自动化]