激光+脉冲熔化极气体保护复合焊接表面成形及稳定性研究  

Investigation on Surface Forming and Stability of Laser+Pulse Melting Gas Metal Arc Hybrid Welding

作　　者：张旺 唐彬 郭彦兵 华学明[3] 李芳[3] Zhang Wang;Tang Bin;Guo Yanbin;Hua Xueming;Li Fang(School of Material Science and Engineering,Shanghai Dianji University,Shanghai 201306,China;Wujing Thermal Power Plant of Shanghai Electric Power Co.,Ltd,Shanghai 200241,China;Shanghai Key Laboratory of Materials Laser Processing and Modification,Shanghai Jiao Tong University,Shanghai,200240,China)

机构地区：[1]上海电机学院材料学院,上海201306 [2]上海电力股份有限公司吴泾热电厂,上海200241 [3]上海交通大学,上海市激光制造与材料改性重点实验室,上海200240

出　　处：《激光与光电子学进展》2020年第17期171-177,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51505271);上海工程技术研究中心(18DZ2253400);2019年度闵行区产学研合作计划项目。

摘　　要：激光电弧复合焊接由于二者耦合的参数较多,为了得到优良的焊缝形貌通常需要进行大量的参数优化工作才能得到一个相对稳定的工艺参数窗口。为了缩短实验周期同时找到非稳定状态产生的内在机理,采用实验设计方法研究了光丝间距、焊接电压、激光功率对激光+脉冲熔化极气体保护焊(GMAW)复合焊接表面成形及过程稳定性的影响。通过高速摄影和电信号系统对影响成形规律差异性的原因进行了解释说明。研究结果显示,较高的电压和较小的光丝间距会导致焊接过程不稳定,造成这一现象的原因是熔滴受力模式和大小发生变化最终导致熔滴落点脱离焊枪移动方向。Due to too many coupling parameters involve in laser arc hybrid welding,in order to obtain a good hybrid welding,a lot of parameter optimization work is usually required to obtain a relatively stable process parameter window.To shorten the experimental period and find out the inherent mechanism of unstable state,in this work,the experimental design method was used to study the surface forming and process stability of the distance laser-arc,welding voltage,laser power,and laser+pulse melting gas metal arc hybrid welding(GMAW).Though high speed photography and electrical signal system,the reasons for the difference of forming law were explained.The results show that higher voltage and smaller distance laser-arc will lead to instability of welding process.The reason for this phenomenon is that the force mode and size of droplet change,and finally the droplet drop point deviates from the moving direction of the welding gun.

关 键 词：激光光学 激光电弧复合焊接 焊缝成形 脉冲激光 熔滴过渡 脉冲熔化极气体保护焊 

分 类 号：O436[机械工程—光学工程]