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通过实际施焊试验,优选出1.2mm厚不锈钢板对接激光焊的焊接工艺参数,用该参数在ANSYS有限元分析软件中对其焊接温度场进行了模拟。建立高斯表面热源与双椭球体热源叠加的组合热源模型,通过对焊缝截面形状的比较探讨了该组合热源中的两种热源模型的功率分配。选用面热源与体热源功率之比为3:7时模拟出的焊缝截面形状与实际施焊的结果最为接近,并且显著优于采用单个热源模型加热时的模拟结果。
Through the actual welding test, the welding process parameters of 1.2mm thick stainless steel butt laser welding are optimized, and the welding temperature field is simulated by ANSYS finite element analysis software. A combined heat source model of Gaussian surface heat source and double ellipsoid heat source superposition is established. The power distribution of two heat source models in the combined heat source is discussed by comparing the cross-sectional shape of the weld. The section shape of the welding seam simulated by the ratio of surface heat source to body heat source power is 3: 7, which is the closest to the result of actual welding, and is significantly better than the simulation results when heated by a single heat source model.