轿车车门铰链焊接变形分析I.基于复合有限元法的凸焊工艺过程模拟

Distortion research on projection welding of car door hinge-Part I:processes simulation of projection welding based on coupled finite element method

关键词:  凸焊  复合有限元法  凸点压溃  焊核成形

Key words:  projection welding  coupled finite element method  projection collapse  nugget formation

摘要:

作为轿车车门铰链凸焊焊接变形研究工作的一部分,根据轿车车门凸焊的具体情况,建立了一个二维有限元凸焊模型。并通过一个复杂的复合有限元分析流程,对整个凸焊工艺过程进行了完整的分析,得到了凸焊凸点压溃过程,凸焊焊核成形过程以及焊后温度场分布等一系列结果。并将模拟得到的成形焊核与试验结果相比较,得到了较好的结论。文中的研究结果将为接下来的凸焊焊后残余应力和焊接变形分析打下良好的工作基础。

Abstract:

As a part of the efforts on distortions analysis of projection welding of car door hinges,a 2D finite element model has been established based on the projection welding of car door hinges.The simulation of whole projection welding processes was performed by a coupled finite element method and the results of projection welding processes,such as the projection collapse mechanism,the nugget formation process and the distribution of temperature after weld,were discussed.Compared with the test results,good conclusions have been achieved.A well base for the on-coming work on prediction of residual stresses and welding distortions was built.