Numerical investigation on the influence of current waveform on droplet transfer in pulsed gas metal arc welding

被引：14

作者：

Xu, Jie ^{[1
]}

Ma, Yiming ^{[1
]}

Wang, Lin ^{[1
]}

Zhang, Yiran ^{[2
]}

Lu, Xu ^{[2
]}

机构：

[1] China Univ Min & Technol, Sch Mat Sci & Phys, Xuzhou 221116, Jiangsu, Peoples R China

[2] Shandong Univ, Inst Mat Joining, MOE Key Lab Liquid Solid Struct Evolut & Mat Proc, Jinan 250061, Peoples R China

来源：

VACUUM | 2022年 / 203卷

基金：

中国国家自然科学基金;

关键词：

Pulsed gas metal arc welding; Pulsed current waveform; Numerical modelling; Coupled model; Fluid flow; Droplet transfer; BEAD HUMP FORMATION; PULSING PARAMETERS; TRANSFER BEHAVIOR; PART II; SIMULATION; POOL; OSCILLATION; DETACHMENT; SELECTION; DYNAMICS;

D O I：

10.1016/j.vacuum.2022.111230

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A numerical model for pulsed gas metal arc welding (P-GMAW) was established to investigate the influence of the welding current on the fluid flow of arc plasma and filler metal in P-GMAW. Three sets of welding current waveforms with identical peak and base current but different median currents at the drop stage of current were used to conduct the experiment and numerical simulation. Bead-on-plate welding experiments under different current waveforms were conducted and the results showed that the waveform with a median current of 140 A had the best tolerance of the welding speed amongst the three current waveforms. Based on the mathematical modelling, the temperature profile and fluid flow of arc plasma and filler metal under different current waveforms were obtained and compared. The results showed that the waveform with a median current of 140 A could lead to lower droplet temperature and velocity when the droplet reached the workpiece compared with the other two waveforms. The simulated droplet shapes at different moments were compared with the captured images by a high-speed camera and they exhibited good agreements.

引用

页数：11

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