CHEN Dongsheng, WANG Heng, CHEN Maoai, et al.Effect of Polarity Ratio on the Arc Stability and Weld Formation of High Speed Square Wave AC TIG-MIG Hybrid Welding[J].Electric Welding Machine, 2022, 52(7): 39-44.
CHEN Dongsheng, WANG Heng, CHEN Maoai, et al.Effect of Polarity Ratio on the Arc Stability and Weld Formation of High Speed Square Wave AC TIG-MIG Hybrid Welding[J].Electric Welding Machine, 2022, 52(7): 39-44. DOI: 10.7512/j.issn.1001-2303.2022.07.06.
Effect of Polarity Ratio on the Arc Stability and Weld Formation of High Speed Square Wave AC TIG-MIG Hybrid Welding
The effects of polarity ratio on the stability and weld formation of high speed square wave AC TIG-MIG hybrid welding process were studied by using bead on plate welding experiment for . It is found that when the polarity ratio of TIG arc is zero, low current TIG arc is susceptible to distinguishing due to its over-elongation caused by long time mutual repulsion between TIG and MIG arcs. TIG-MIG hybrid welding process is unstable and weld formation is poor. When the polarity ratio of TIG arc is in the range of 10 ~ 40, a stable TIG-MIG hybrid welding process can be obtained under the TIG arc current of 50A, and the hump defects easy to occur in DC TIG-MIG hybrid welding can be suppressed。 When the polarity ratio is 10, the weld forming is the best. When the polarity ratio is too large, the smoothness of the weld surface decreases, the weld toe fluctuates obviously, and there are more large particle spatters.
LOU Xiaofei, CHEN Maoai, WU Chuansong,et al. Humping and undercutting suppression mechanism for high speed TIG-MIG hybrid welding[J]. Transactions of the China Welding Institution, 2014, 35(8):87-90.
Chen J, Wu C S. Numerical analysis of hump weld bead formation process in high speed GMAW[J]. Acta Metallurgica Sinica, 2009, 45(9): 1070-1076.
Chen J, Wu C S, Chen M A. Improvement of welding heat source models for TIG-MIG hybrid welding process[J]. Journal of Manufacturing Processes, 2014, 16(4): 485-493.
崔双双. TIG-MIG复合电弧熔滴行为数值分析[D]. 山东:山东大学, 2020.
Cui Shuangshuang. Numerical simulation of arc and metal transfer behavior of TIG-MIG Hybrid Welding[D]. Shandong:Shandong University, 2020.
YANG Tao, ZHANG Shenghu, GAO Hongming,et al. Analysis of arc characteristics and mechanism of TIG-MIG hybrid welding[J]. Transactions of the China Welding Institution, 2012, 33(7):25-28.