Analysis of weld pool vibration characteristics in pulsed gas metal arc welding  

作　　者：Lü Xiaoqing Zhang Peng Shen Jun 吕小青;张鹏;沈俊(School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China;Tianjin Key Laboratory of Advanced Joining Technology,Tianjin University,Tianjin 300072,China)

机构地区：[1]School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China [2]Tianjin Key Laboratory of Advanced Joining Technology,Tianjin University,Tianjin 300072,China

出　　处：《China Welding》2019年第4期28-32,共5页中国焊接（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Numbers 51205283).

摘　　要：Using highspeed camera image measuring and processing,the contour of the weld pool was extracted accurately in pulsed metal inert gas(P-MIG)welding.Based on this extraction method,time and frequency domain characteristics at different points along the contour of the weld pool were analyzed for one pulse one droplet and one pulse two droplets,respectively.The results show that,because of the wave super position that was created by the pulsed arc and droplet impacting the weld pool,the oscillation amplitude along the weld pool fluctuated and decreased with an increase in distance from the point to the arc center.The oscillation near the arc center was complex and intense for one pulse two droplets,and the amplitude were relatively small because the oscillation caused by the pulsed arc could be offset by the molten droplet impact.The weld pool oscillation that was caused by the pulsed arc was stronger than that caused by the droplet.

关 键 词：pulsed metal inert welding weld pool oscillation INTERFERENCE time domain chart frequency domain chart 

分 类 号：TG444[金属学及工艺—焊接]