Evaluation of Arc Stability in Double-Wire DP-GMAW of Aluminum Alloy Based on U-I Graph

Autor: Kaiyuan Wu, Zhang Mingjin, Peimin Xie, Xiaobin Hong, Zeng Yucai
Rok vydání: 2021
Předmět:
Zdroj: Journal of Manufacturing Science and Engineering. 144
ISSN: 1528-8935
1087-1357
DOI: 10.1115/1.4052931
Popis: Severe arc interference in double-wire double pulsed gas metal arc welding (DP-GMAW) can affect the stability of the welding process. In this study, voltage and current waveforms during double-wire DP-GMAW of aluminum (Al) alloy in the 0 deg and 180 deg phase shift modes were recorded. The relationship between arc voltage and welding current was investigated through the output voltage-current (U-I) graph. In addition, arc load characteristics and variation of voltage and current during the DP switching process were analyzed. The arc behavior was recorded throughout the welding process using a high-speed photography system, and the relationship between the U-I graph characteristics and arc stability was further investigated. The experimental results demonstrate that the arc is more stable in the 180 deg phase shift mode. In both phases, the leading arc impedance is more capacitive, and the trailing arc impedance is more resistive.
Databáze: OpenAIRE
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