A Study on Minimizing Welding Deformation of Joints for the Sealing of Emission After-Treatment Structure

Materials

Changwook Ji¹  Jaewoong Kim²  Kwangjin Lee³  Jaehwang Kim³  Hwanjin Kim⁴  Kwangsan Chun⁵  Sungwook Kang⁶  Wangho Yun⁶  Hong-Lae Jang⁷ 

[1] Advanced Forming Process R&D Group, Korea Institute of Industrial Technology, Ulsan-si 44413, Korea;Automotive Materials & Components R&D Group, Korea Institute of Industrial Technology, Gwangju 61012, Korea;Carbon & Light Materials Application R&D Group, Korea Institute of Industrial Technology, Jeonju-si 54853, Korea;Electromagnetic Wave Fusion Research Department, Gyeongbuk Research Institute of Vehicle Embedded Technology, Yeongcheon-si 38822, Korea;Industrial Application R&D Group, Welding Engineering R&D Department, Daewoo Shipbuilding & Marine Engineering Co., Ltd., Geoje-si 53302, Korea;Precision Mechanical Process and Control R&D Group, Korea Institute of Industrial Technology, Jinju-si 52845, Korea;School of Mechanical Engineering, Changwon National University, Changwon-si 51140, Korea;

关键词: thermal elasto-plastic analysis;    welding sequence;    muffler structure;    finite element method;    welding deformation;   

DOI  :  10.3390/ma14226982

来源: DOAJ

【 摘 要 】

As the environmental pollution issue has recently become significant, environmental regulations in Europe and the United States are being strengthened. Thus, there is a demand for the quality improvement of emission after-treatment systems to satisfy the strengthened environmental regulations. Reducing the amount of welding heat distortion by optimization of the welding order of each part could be a solution for quality improvement since the emission after-treatment system consists of many parts and each assembly is produced by welding individual ones. In this research, a method to derive a welding sequence that effectively minimizes welding deformation was proposed. A two-stage simulation was performed to obtain the optimal welding sequence. In the first stage, the welding sequence was derived by analyzing the number of welding groups in each assembly of a structure. The derived welding sequence was verified by performing a thermal elasto-plastic analysis and comparing it with the experimental results.

【 授权许可】

Unknown