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对于铝合金的焊接其焊后残余应力导致的焊接变形,尤其对于薄板的焊接其焊接变形问题更为严重。本文运用MSC.Marc大型有限元模拟软件对LD10铝合金的随焊锤击工艺进行三维模拟,为优化铝合金随焊锤击工艺的工艺参数,提供了理论依据和指导。结果说明:由于焊接热源后的锤击作用使得作用区域的金属发生了塑性延展,从而导致工件的纵向残余拉应力峰值、纵向残余弹、塑性变形量均逐渐减小。分析认为,随焊锤击能够减少焊接区因局部加热而导致的压缩塑性变形,降低了焊接残余应力,从而起到控制薄板焊接失稳变形的目的。
For the welding of aluminum alloy after welding residual stress caused by welding deformation, especially for the welding of sheet metal welding deformation problem is more serious. In this paper, large-scale finite element simulation software MSC.Marc is used to simulate the welding process of LD10 aluminum alloy with hammer, which provides the theoretical basis and guidance for optimizing process parameters of aluminum alloy with hammer-hammering process. The results show that due to the hammering action after the welding heat source, the metal in the working area is plastic extended, resulting in the peak longitudinal residual tensile stress, the longitudinal residual elastic deformation and the plastic deformation decreasing gradually. The analysis shows that with the hammer hammer can reduce the welding zone due to local heating caused by compression plastic deformation, reducing the welding residual stress, which played the purpose of controlling the instability of sheet metal welding deformation.