• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2023, Vol. 59 ›› Issue (20): 1-17.doi: 10.3901/JME.2023.20.001

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Advances in Forming and Joining Processes of Lightweight High-strength Thin-walled Vehicle Structures

LIN Zhongqin, MA Yunwu, XIA Yujun, LI Yongfeng, LI Shuhui, LI Yongbing   

  1. Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao Tong University, Shanghai 200240
  • Received:2023-07-15 Revised:2023-08-29 Online:2023-10-20 Published:2023-12-08

Abstract: The load-bearing structures of aircrafts, carrier rockets, high-speed trains, automobiles, and other transportation tools are featured with thin-walled structures, and manufactured with lightweight and high-strength materials. The forming process needs to meet the requirements of high strength of the final components, good formability, low-cost, and short process. At the same time, thin-walled structures are increasingly using a mixture of multi-materials and multi-structures, which not only improves the lightweighting effect and design flexibility, but also poses a huge challenge to traditional joining processes. This article reviews the research advances of hot stamping technology for lightweight and high-strength sheet metals, as well as riveting and resistance spot welding technologies for thin-walled components. The technological changes brought by new materials and structures to the forming and joining processes are analyzed systematically. The technical challenges and future development directions of these processes are pointed out, aiming to provide guidance and reference for the manufacturing of lightweight, high-strength, and thin-walled components.

Key words: lightweight and high-strength material, thin-walled structure, hot stamping, resistance spot welding, riveting

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