【摘要】 为探讨拼焊板多点成形工艺的可行性,采用显式有限元软件,针对球形件和斜壁盒形件进行了数值模拟。分析了拼焊板多点成形过程中出现的压痕和起皱现象及其抑制方法,探讨了焊缝偏移的影响因素。结果表明:采用弹性垫和阶梯式压边圈可以有效地解决拼焊板多点成形过程中出现的压痕和起皱问题,使成形件表面光滑。成形过程中,焊缝初始位置距离板料中心越远、板料厚度相差越大、板料变形量越大,焊缝偏移量就越大。更多还原

【Abstract】 To investigate the feasibility of the multi-point forming(MPF) for the tailor-welded bank(TWB),the MPFs of the sphere and the pyramid TWBs were simulated by an explicit finite element analysis software.The simulation results show that the elastic cushion and the stepped blank holder can suppress the dimpling and wrinkling defects,leading to better parts with smooth surface.During the MPF of the TWB,the weld lines move and their movements increase as the distance between the initial weld line location and the center point,the TWB thickness diversity and the distortion of the TWB increase.更多还原