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拼焊板在拉延成形时焊缝移动受多方面因素的影响,本文模拟分析了不同压边力值和分段压边力对具有两道焊缝的差厚激光拼焊板汽车后纵梁在拉延成形过程中焊缝移动的影响。通过分析在不同压边力下两条焊缝的移动量得出了焊缝最大移动量随压边力的增大而增大的规律。为了减小两条焊缝的移动量,成形过程中在保证总压边力不变的情况下对差厚拼焊板的不同板厚部分设置不同的压边力。通过模拟分析得出了焊缝最大移动量随着薄侧压边力的增大和厚侧压边力的减小而减小。合理的增大薄侧板料压边力,减小厚侧板料压边力可以减小焊缝移动量,提高成形质量。
Tailor welded plate in the drawing forming process when the weld is affected by many factors, this paper simulates and analyzes the different blank holder force and the sectional blanker force on the thickness of two welded seam welding tailgates Effect of weld movement during drawing process. By analyzing the movement of two welds under different blank holder forces, the law that the maximum displacement of weld increases with the increase of blank holder force is obtained. In order to reduce the amount of movement of the two welds, different blank holder forces are set on the different thickness portions of the different thickness tailor-welded blankets under the condition of ensuring the total blank holder force during the forming process. Through the simulation analysis, it is concluded that the maximum displacement of the weld decreases with the increase of the pressure on the thin side and the decrease of the pressure on the thick side. Reasonably increase the pressure on the thin side of the board blanker, blanker blank side of the thicker force can reduce the amount of weld movement and improve the forming quality.