激光-MIG电弧的复合作用及对熔滴过渡的影响  

Hybrid interaction of laser and pulsed MIG arc and its influence on metal transfer

作　　者：韦辉亮[1] 李桓[1] 王旭友[2] 王威[2] 高莹[3] 

机构地区：[1]天津大学天津市现代连接技术重点实验室,天津300072 [2]哈尔滨焊接研究所,哈尔滨150080 [3]天津职业技术师范大学天津市高速切削与精密加工重点实验室,天津300222

出　　处：《焊接学报》2011年第11期41-44,115,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51175374);国家"十一五"科技支撑计划资助项目(2006BAF04B10);天津市应用基础及前沿技术研究计划资助项目(09JCYBJC05000);天津市科技支撑计划重点资助项目(10ZCKFSF00200)

摘　　要：试验研究激光与MIG电弧的相互影响与相互作用,以及激光的加入对MIG电弧形态与熔滴过渡形式的影响.搭建了YAG激光-脉冲MIG电弧复合焊接试验系统,进行了焊接试验并同步采集了焊接过程中的电信号和高速摄像图片信号.通过分析电信号和高速摄像图片可以发现,对于一脉一滴的焊接过程,加入激光后熔滴过渡形式由一脉一滴变为两脉一滴过渡.激光对脉冲MIG电弧具有明显的吸引作用.文章分析了加入激光后熔滴受力情况的变化,发现促进熔滴过渡的等离子流力竖直向下的分力减小是导致熔滴过渡频率降低的主要原因.Experiments were conducted to research the mutual effect,the interaction of laser and MIG arc and the influence of the addition of laser on the form of MIG arc and the type of metal transfer.The YAG laser and pulsed MIG hybrid welding system was established.In addition,high-speed photography system was used to observe the arc behavior and metal transfer,with the current signals and voltage signals of the arc collected synchronously.It was found that the metal transfer mode changed from one droplet per pulse to one droplet every two pulses with the addition of laser to MIG welding.Pulsed MIG arc could be apparently attracted by laser.The decrease of the vertical-force component of plasma force which could promote metal transfer was the main reason that caused the decline of the frequency of metal transfer.

关 键 词：复合焊 熔滴过渡 高速摄像 

分 类 号：TG403[金属学及工艺—焊接]