机械工程学报 >

2018 , Vol. 54 >Issue 2: 102 - 109

DOI: https://doi.org/10.3901/JME.2018.02.102

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

  • 赵文勇 ,
  • 刘湘波 ,
  • 吴海江 ,
  • 魏艳红 ,
  • 张韬 ,
  • 李卓
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  • 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
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

收稿日期: 2017-05-27

  修回日期: 2017-09-21

  网络出版日期: 2018-01-20

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。

收起

Finite Element Simulation of Welding Process Based on Reverse Engineering

  • ZHAO Wenyong ,
  • LIU Xiangbo ,
  • WU Haijiang ,
  • WEI Yanhong ,
  • ZHANG Tao ,
  • LI Zhuo
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  • 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 date: 2017-05-27

  Revised date: 2017-09-21

  Online published: 2018-01-20

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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

本文引用格式

赵文勇 , 刘湘波 , 吴海江 , 魏艳红 , 张韬 , 李卓 . 基于逆向工程的焊接过程有限元模拟[J]. 机械工程学报, 2018 , 54(2) : 102 -109 . DOI: 10.3901/JME.2018.02.102

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; reverse engineering; finite element analysis

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