Investigation of double arc interaction mechanism and quantitative analysis of double arc offset in high-power double-wire DP-GMAW

Wu, Kaiyuan; Xie, Peimin; Liu, Zhao; Min, Zeng; Liang, Zhuoyong

doi:10.1016/j.jmapro.2019.10.022

Cited by 7 publications

(1 citation statement)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, Al alloy has a significant negative temperature coefficient of surface tension, indicating that as the temperature rises, the surface tension decreases. This gradient in surface tension induces lateral flow of the molten metal from the center towards the edges of the molten pool, resulting in the Marangoni effect and an increase in weld width [33]. However, it can be concluded that a significant portion of the high temperature in the center of the molten pool is transferred to the deeper part through convergent circulation in order to melt the base metal.…”

Section: Experimental Conditionsmentioning

confidence: 99%

Influence of high-frequency pulse on droplet transfer process and weld formation in double-wire median pulsed GMAW of aluminum alloy

Wu,

Lin,

Yang

et al. 2024

Preprint

Self Cite

View full text Add to dashboard Cite

A double-wire median pulsed gas metal arc welding (GMAW) with a high-frequency pulse waveform was developed to study the influence of a high-frequency pulse on the droplet transfer process and weld formation in aluminum (Al) alloy. The droplet transfer process was recorded using a high-speed photography system. At the same time, the influence of a high-frequency pulse at peak stage was investigated. The experimental results demonstrated that stable droplet transfer and continuous welds are obtained by incorporating high-frequency pulses. The high-frequency pulses increase electromagnetic force and facilitate premature detachment of droplets. Especially, at a high frequency of 20 kHz, one drop per pulse (ODPP) droplet transfer mode is achieved, which is the ideal mode. In addition, high-frequency pulses increase axial arc pressure, strengthen convergent flow, and reduce the effect of divergent flow, resulting in increased weld penetration while decreasing weld width and porosity.

show abstract

Section: Experimental Conditionsmentioning

confidence: 99%