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采用有限元分析软件对20Cr低合金钢汽车离合器盘TIG焊接过程进行数值仿真,预测最优热源参数下焊接变形和残余应力的分布。结果表明:冷却过程中,焊接变形逐渐减小,焊接应力逐渐增大。室温状态时,最大焊接残余变形为0.188334 mm,最大焊接残余应力为679.023 MPa。另外,在焊接起始点位置,由于受两次焊接热循环的影响,该位置具有较小的焊接变形量。
The finite element analysis software is used to simulate TIG welding process of 20Cr low alloy steel automotive clutch disc, and the distribution of welding deformation and residual stress under the optimal heat source parameters is predicted. The results show that during the cooling process, the welding deformation decreases and the welding stress increases gradually. Room temperature state, the maximum welding residual deformation of 0.188334 mm, the maximum welding residual stress of 679.023 MPa. In addition, at the welding start point, the position has a smaller amount of welding deformation due to the influence of two welding thermal cycles.