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

Autor: Kang S; Precision Mechanical Process and Control R&D Group, Korea Institute of Industrial Technology, Jinju-si 52845, Korea., Yun W; Precision Mechanical Process and Control R&D Group, Korea Institute of Industrial Technology, Jinju-si 52845, Korea., Kim H; Electromagnetic Wave Fusion Research Department, Gyeongbuk Research Institute of Vehicle Embedded Technology, Yeongcheon-si 38822, Korea., Kim J; Automotive Materials & Components R&D Group, Korea Institute of Industrial Technology, Gwangju 61012, Korea., Ji C; Advanced Forming Process R&D Group, Korea Institute of Industrial Technology, Ulsan-si 44413, Korea., Lee K; Carbon & Light Materials Application R&D Group, Korea Institute of Industrial Technology, Jeonju-si 54853, Korea., Kim J; Carbon & Light Materials Application R&D Group, Korea Institute of Industrial Technology, Jeonju-si 54853, Korea., Jang HL; School of Mechanical Engineering, Changwon National University, Changwon-si 51140, Korea., Chun K; Industrial Application R&D Group, Welding Engineering R&D Department, Daewoo Shipbuilding & Marine Engineering Co., Ltd., Geoje-si 53302, Korea.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2021 Nov 18; Vol. 14 (22). Date of Electronic Publication: 2021 Nov 18.
DOI: 10.3390/ma14226982
Abstrakt: 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.
Databáze: MEDLINE
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