• CN：11-2187/TH
• ISSN：0577-6686

• 特邀专栏:焊接过程测控与数值模拟 •

### 基于逆向工程的焊接过程有限元模拟

1. 1. 南京航空航天大学材料科学与技术学院 南京 211106;
2. 上海翼锐汽车科技有限公司 上海 201805
• 收稿日期:2017-05-27 修回日期:2017-09-21 出版日期:2018-01-20 发布日期:2018-01-20
• 通讯作者: 魏艳红(通信作者),女,1965年出生,博士,教授,博士研究生导师。主要研究方向为材料焊接性及焊接工艺、焊接过程数值模拟与仿真、焊接工程应用软件设计、数字化焊接。E-mail:yhwei@nuaa.edu.cn
• 作者简介:赵文勇,男,1994年出生。主要研究方向为焊接过程数值模拟与仿真。E-mail:wy_zhao@nuaa.edu.cn
• 基金资助:
江苏高校优势学科建设工程（PAPD）和中央高校基金重大项目培育基金（NP2016204）资助项目。

### Finite Element Simulation of Welding Process Based on Reverse Engineering

ZHAO Wenyong1, LIU Xiangbo1, WU Haijiang2, WEI Yanhong1, ZHANG Tao2, LI Zhuo2

1. 1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106;
2. Shanghai Yi Rui Automotive Technology Co., Ltd., Shanghai 201805
• Received:2017-05-27 Revised:2017-09-21 Online:2018-01-20 Published:2018-01-20

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.