Scholarlink

<p>In this study, the meandering bead formation process during a Metal Inert Gas Welding (MIGW) was investigated, and the factors causing bead meandering were identified. An experimental system with six tungsten cathodes arranged in a circular pattern, capable of linear movement in the radial direction, was used to simulate the behavior of the cathode spots and the molten wire during MIGW. As a result, it was observed that when there was a bias in the distribution of the cathode spots and the welding current, molten metal droplets detached from the wire tip were carried to the side opposite to where the cathode spots and welding current were concentrated. The correlation coefficients between the welding current bias and the angle of the molten metal column, as well as the droplet transport position, were 0.92 and 0.97, respectively, indicating a strong positive correlation. From these results, it was suggested that meandering bead formation during MIGW was caused by the molten metal droplets transported intensively away from the weld line due to unbalanced driving forces acting on the molten wire, which were caused by the unbalanced cathode spot distribution and welding current. It was suggested that in MIGW, the crawling behavior of the cathode spots induced the destabilization of the molten metal droplet transfer formed at the wire tip, leading to the formation of meandering beads.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigation of the meandering bead formation process in metal inert gas welding

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月27日

查看全文
  • Kai Aoyama,
  • Hisaya Komen,
  • Manabu Tanaka,
  • Kyohei Konishi,
  • Koichi Taniguchi,
  • Satoshi Igi

摘要

In this study, the meandering bead formation process during a Metal Inert Gas Welding (MIGW) was investigated, and the factors causing bead meandering were identified. An experimental system with six tungsten cathodes arranged in a circular pattern, capable of linear movement in the radial direction, was used to simulate the behavior of the cathode spots and the molten wire during MIGW. As a result, it was observed that when there was a bias in the distribution of the cathode spots and the welding current, molten metal droplets detached from the wire tip were carried to the side opposite to where the cathode spots and welding current were concentrated. The correlation coefficients between the welding current bias and the angle of the molten metal column, as well as the droplet transport position, were 0.92 and 0.97, respectively, indicating a strong positive correlation. From these results, it was suggested that meandering bead formation during MIGW was caused by the molten metal droplets transported intensively away from the weld line due to unbalanced driving forces acting on the molten wire, which were caused by the unbalanced cathode spot distribution and welding current. It was suggested that in MIGW, the crawling behavior of the cathode spots induced the destabilization of the molten metal droplet transfer formed at the wire tip, leading to the formation of meandering beads.