Prediction of distortion in spot welding assembly
The prediction of distortion for assembly of the thin-walled structures by Resistance Spot Welding (RSW) is investigated.Objective is to suggest a feasible and reliable procedure for the analysis of RSW assembly.It is expected that the proved method can be applied in real production and process design,especially for the assembly of automotive components in its body.The dimensional inaccuracy of the parts to be assembled together and issued of the precedent stamping process,plays an important role in the prediction.The effect of instantaneous spot heating and short time cooling at different joined spots on part distortion is evaluated,too.It represents the effect of local distortions induced by the RSW on global distortion of the assembled part.In literatures,simulations on single point RSW had shown its local effect (distortion,residual stress).The problem is how these local effects are incorporated into the simulation of spot-welded assembly.In the present paper,local effect of RSW spots is introduced in RSW assembly for prediction of the global distortion,in addition to the effect of dimension inaccuracy in the stamped parts to be assembled.The analysis of RSW spot is realized by Sysweld,a specialized code for welding simulation.The result oflocal effect is introduced into the simulation of global assembly,realized by the commonly used software Ansys.In the later,shell elements are used to render the computation cost-effective.To illustrate the proposed method,the assembly of a rear section in a car is taken as an example.The effectiveness and feasibility of the proposed method are shown by the results.In fact,it is observed that the local effect of RSW spots does not represent significant influence on the distortion of global assembly.
Resistance spot welding Assembly Distortion Simulation
Zhigang Han Baosheng Liu Zhiqiang Cheng
School of Mechanics and Engineering,Southwest Jiaotong University,Chengdu 610031,China
国际会议
成都
英文
539-544
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）