双丝间接电弧氩弧焊的熔滴过渡

Metal transfer of twin-wire indirect arc argon welding

采用氙灯背光高速摄像系统及示波器对双丝间接电弧氩气保护焊的熔滴过渡及其对应的电压、电流波形进行了研究。结果表明,双丝间接电弧氩弧焊焊接电流与电弧电压的不同匹配选择,熔滴具有短路过渡、大滴过渡、混合过渡、射滴过渡、射流过渡等不同过渡形式。随着焊接电流的增大熔滴尺寸减小,熔滴细化,随电弧电压的增大,熔滴尺寸减小。熔滴过渡形式与电压、电流的波形之间有很好的对应关系。

The metal transfer and the conrresponding arc voltage and welding current in twin-wire indirect arc argon welding was investigated with high speed camera system based on a xenon lamp source and digital oscillogragh.Results showed that with the different matching of welding current and arc voltage,the mode of metal transfer consists of short circuiting transfer,globular transfer,mixing transfer,projected transfer and streaming transfer etc.With the increasing of welding current,the droplet size reduces,and the droplet is refined.With the raising of arc voltage,the size of droplet reduces.There is well corresponding relationship between metal transfer mode and the oscillogram of volgtage and welding.