厚铜板焊接的计算机模拟与实验研究

Computer simulation and experimental study on welding of thick copper plate

基于焊接模拟前处理软件和焊接模拟后处理软件进行厚铜板三个电弧焊接过程温度场的数值模拟和实验对比研究。先利用前处理软件进行建模和划分网格等工作,再利用后处理软件完成焊接仿真模拟过程。本研究主要是用后处理软件调整焊接电流、电弧电压、焊枪间距、焊接速度,送丝速度等工艺参数,进行多组工艺参数下厚铜板焊接温度场的模拟,然后对比分析不同焊接工艺参数下的焊接温度场云图,获得最佳焊接工艺参数(焊枪间距16 mm,焊接电流300 A,TIG焊枪电压16 V,MIG焊枪电压20 V,MIG焊枪送丝速度10 mm/s),模拟结果为:MIG焊枪的熔池大小为:熔宽6.4 mm、熔深4.8 mm、熔池长度12.6 mm。

Based on pre-processing software and post-processing software,the numerical simulation and experimental comparison of the temperature field of the three arc welding processes of thick copper plates are carried out.First use the pre-processing software to perform modeling and meshing,and then use the post-processing software to complete the welding simulation process.This study mainly uses post-processing software to adjust welding current,arc voltage,distance between welding guns,welding speed,wire feeding speed and other process parameters to simulate the welding temperature field of thick copper plate under multiple sets of process parameters.Then,the welding temperature field nephogram of different welding parameters is compared and analyzed,in order to obtain the best welding parameters(Welding distance of 16 mm,welding current 300 A,TIG welding gun voltage is 16 V,MIG welding gun voltage is 20 V,MIG welding torch wire speed of 10 mm/s).The simulation results are as follows:the melting distance of MIG welding torch is 6.4 mm,the penetration depth is 4.8 mm,the length of molten pool is 12.6 mm.