• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (2): 102-109.doi: 10.3901/JME.2018.02.102

• 特邀专栏:焊接过程测控与数值模拟 • 上一篇    下一篇

基于逆向工程的焊接过程有限元模拟

赵文勇1, 刘湘波1, 吴海江2, 魏艳红1, 张韬2, 李卓2   

  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

摘要: 传统的针对复杂构件的焊接过程有限元模拟均是基于理论的、理想的简化几何模型,其问题是模型建立的过程较为漫长,精度不足;而焊接构件在焊接前往往经过前道机加工序诸如锻造的处理,使得构件实际尺寸与原始设计尺寸不符,从而造成实际构件尺寸形状与理论几何模型存在差异。快速制造系统中用于非规则复杂曲面实体建模的逆向工程技术近年来得以快速发展,将其运用于复杂非规则焊接件的焊接过程的有限元模拟不仅可以提高建模精度,而且可以缩短建模周期。以某车车身侧围后内板为例,采用逆向工程技术获得实体模型,证实了基于逆向工程建模的高效性和精确性;并建立电阻点焊的有限元模型,分析不同焊接工序下应力场和变形的分布情况,研究了后道工序的应力场和变形对前道工序的影响,以优化焊接工艺,指导生产实践。

关键词: 复杂构件, 逆向工程, 有限元分析

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

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