5182Al/HC340LA异种金属件磁脉冲焊接数值模拟与试验验证  

Numerical simulation and experimental verification of magnetic pulse welding for dissimilar metal parts 5182Al/HC340LA

作　　者：李光耀[1,2] 陈侣侣[1] 耿辉辉 袁伟[1] 崔俊佳[1,2] LI Guang-yao;CHEN Lu-lu;GENG Hui-hui;YUAN Wei;CUI Jun-jia(State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;Joint Centre for Intelligent New Energy Vehicles, Tongji University, Shanghai 201804, China)

机构地区：[1]湖南大学汽车车身先进设计制造国家重点试验室,湖南长沙410082 [2]同济大学智能型新能源汽车协同创新中心,上海201804

出　　处：《塑性工程学报》2018年第3期155-162,共8页Journal of Plasticity Engineering

基　　金：国家自然科学基金重点项目(61232014);国家自然科学基金资助项目(51405149)

摘　　要：采用顺序耦合法建立了三维电磁场和变形场的仿真模型。采用Ls-dyna将有限元方法和边界元方法相结合,对5182Al/HC340LA板件磁脉冲焊接过程进行仿真模拟。通过分析仿真模型的电磁场和变形场,发现飞板的感应电流和电磁力出现了双波峰的现象并且感应电流在飞板的搭接区域形成了两个相连的矩形回路。放电能量是磁脉冲焊接过程中一个重要的工艺参数,随着放电能量的增加,飞板的感应电流、电磁力、板件塑性变形、碰撞速度也随之增加。开展不同放电能量下的磁脉冲焊接工艺试验,通过对比飞板的速度和变形量,发现试验结果与数值模拟结果吻合较好,验证了该数值模型的可靠性。A three-dimensional electromagnetic field and deformation field coupling model was established by using the sequential coupling method. The finite element method and the boundary element method were combined by using Ls-dyna to simulate the magnetic pulse welding（ MPW） process of 5182 Al/HC340 LA plate. By analyzing the electromagnetic field and deformation field of the simulation model,it is found that the induced current and electromagnetic force of the flying plate appear double peak phenomenon,and the induced current forms two connected rectangular loops in the lap area of the flying plate. Discharge energy is an important process parameter in magnetic pulse welding. With the increase of discharge energy,the induced current,electromagnetic force,plastic deformation and collision speed of the flying plate also increase. The magnetic pulse welding tests under different discharge energies were completed. The velocity and deformation of the flying plate during the magnetic pulse welding process were compared. The result shows that the experimental results are in good agreement with the simulation results,which verifies the accuracy of the numerical simulation model.

关 键 词：磁脉冲焊接 汽车轻量化 数值模拟 异种金属连接 

分 类 号：TG391[金属学及工艺—金属压力加工]