A method for self-regulating welding residual stress of high-strength steel suspension arm
By quantifying the matching of weld constraint stiffness and heat input, and combining stress-compensated welds and interpass temperature control, the quantitative design problem of residual stress control in high-strength steel cantilever welds was solved, achieving efficient stress regulation and fatigue life improvement.
CN122400872APending Publication Date: 2026-07-17WANXIANG QIANCHAO GUILIN CHASSIS PARTS +1
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WANXIANG QIANCHAO GUILIN CHASSIS PARTS
- Filing Date
- 2026-04-30
- Publication Date
- 2026-07-17
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Figure CN122400872A_ABST
Abstract
本发明公开了一种用于高强钢悬架臂的焊缝残余应力自调控方法，属于汽车零部件焊接制造技术领域。该方法包括：通过有限元分析量化各焊缝的综合约束刚度；根据约束刚度与热输入量的定量匹配关系计算各焊缝的焊接线能量，对高约束焊缝采用低热输入，对低约束焊缝采用常规热输入；按约束刚度由小到大的顺序规划焊接次序，并将横向焊缝安排为末道焊缝；对高约束焊缝设置补偿焊道，利用补偿焊道冷却收缩对主焊缝施加压缩作用；对多层焊缝采用层间温度梯度递减控制。本发明实现了焊缝残余应力的定量化设计和过程自调控，无需额外焊后去应力处理，可将峰值残余拉应力降低至母材屈服强度的25%至40%，疲劳寿命提升2至3倍以上。
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