CO_2激光-MAG电弧复合焊接工艺参数的优化  

Welding parameters optimization of CO_2 laser-MAG hybrid welding

作　　者：刘双宇[1] 张宏[1] 刘凤德[1] 石岩[1] 

机构地区：[1]长春理工大学机电工程学院,长春130022

出　　处：《焊接学报》2011年第10期61-64,116,共4页Transactions of The China Welding Institution

基　　金：国家教育部新世纪优秀人才支持计划项目(XSJ2008-1);科技部国际科技合作项目(2009DFB70360)

摘　　要：采用汉诺威分析仪和高速摄像机采集了CO2激光-MAG电弧复合焊接过程中的电信号和熔滴过渡图像,研究了焊接电流、电弧电压、激光功率等参数对复合焊接瞬时电压和电流信号、电压和电流概率密度分布、熔滴过渡特征和工艺稳定性的影响.结果表明,将汉诺威分析仪和高速相机相结合能提供丰富的焊接电弧物理指数和熔滴过渡形态信息,可为复合焊接的工艺参数优化指明方向.瞬时焊接电流和瞬时电弧电压概率密度分布曲线向中间收敛,高电流和高电压区概率较小时,有利于焊接过程的稳定.激光能量影响熔滴的过渡频率,激光功率增加,易发生颗粒过渡或短路过渡.In the present work,Hanover Analysator,analysis system and high speed camera were used to acquire the voltage and current data of CO2 laser-MAG hybrid welding.The effect of the arc current,arc voltage and laser power on the oscillogram of arc voltage and welding current,the probability density distribution of arc voltages and current,the droplet transfer character,process stability and weld geometry were investigated.The results indicated that many weld arc physics parameters and droplets transfer information can be provided by Hanover Analysator and high speed camera system,which provided experimental way for optimization welding parameters.Probability density distribution of arc voltages and currents is toward center,that means the range of high current and voltage is smaller,which favors the stability of the droplet transfer and hybrid welding processes.Droplet transfer frequency was affected by laser power.The droplet diameter and growing period increases with increasing laser power.As a result,the droplet transfer mode is globular transfer or transfer mode between globular and projected.

关 键 词：激光-电弧复合焊接 汉诺威分析仪 电弧物理指数 熔滴过渡 

分 类 号：TG115.28[金属学及工艺—物理冶金]