电磁熔池自动控制激光束焊接工艺及仿真  

Simulation of laser beam welding technology with automatic control of electromagnetic molten pool

作　　者：王升花[1] 

机构地区：[1]承德石油高等专科学校,河北承德067000

出　　处：《电焊机》2015年第11期14-20,共7页Electric Welding Machine

基　　金：河北省教育厅科学研究计划项目(SZ090204)

摘　　要：研究外部施加的磁场对激光束焊接质量的影响,利用计算机模拟的结果进行工艺参数的优化。焊接测试使用功率高达20 k W的激光束,试验证明功率为15 k W的交流磁铁可以在20 mm厚铝的全穿透焊过程中阻止重力下降。对于部分穿透焊接,一个0.5 T的直流磁场足够用于抑制熔池中的对流流动。部分穿透焊接测试使用功率为4 k W的电子束,测试结果显示,相比于参考值,应用交流磁场可以减少10倍的焊接气孔,提高了焊接表面粗糙度。The effect of external applied magnetic field on the welding quality of laser beam is studied and the technological parameters are optimized by computer simulation results in this paper. The laser beam with the power of 20 kW is used in the welding test, and the results show that the AC magnet with the power of 15 kW can prevent the gravity from dropping in the full penetration welding process of 20 mm thick aluminum. For partial penetration welding,a 0.5 T DC magnetic field is enough for the inhibition of convective flow in the molten pool. The electron beam with the power of 4 kW is used in the partial penetration welding test, and the results show that comparing with the reference value,the application of AC magnetic field can reduce 10 times welding holes ,and improve about 50% of the welding surface roughness.

关 键 词：激光束焊接 电磁熔池支持 哈特曼效应 电磁整流 

分 类 号：TG456.7[金属学及工艺—焊接]