Finite Element Simulation of Welding Process Based on Reverse Engineering

doi:10.3901/JME.2018.02.102

Abstract

Abstract: The traditional finite element modeling of the welding process for complex components is based on the theoretical and ideal CAD model. The problem is that the modeling period is long and the precision is not high enough. However, the machining before actual welding processing, such as forging, often change the shape and size of the actual component comparing with the designed one. It finally results in the difference between the actual and theoretical geometry model. The application of reverse engineering technology which used in irregular complex surface modeling of rapid manufacturing system and developed rapidly in recent years for welding structure can not only improve the modeling accuracy, but also shorten the whole modeling period. Taking the inner panel of a vehicle rear body side as an example, the reverse engineering technology is used to obtain the CAD model, which proves the high efficiency and accuracy of the reverse engineering modeling. In order to optimize the welding process and guide the production practice, the finite element model based on resistance spot welding is established to analyze the distribution of stress field and deformation under different welding steps and the interaction of stress field and deformation between two continuous processes.

Key words: complex components, finite element analysis, reverse engineering

CLC Number:

TG441

ZHAO Wenyong, LIU Xiangbo, WU Haijiang, WEI Yanhong, ZHANG Tao, LI Zhuo. Finite Element Simulation of Welding Process Based on Reverse Engineering[J]. Journal of Mechanical Engineering, 2018, 54(2): 102-109.

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