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Optimization of weld bead shape in double-sided arc welding of AA5182 aluminum sheet.

机译：AA5182铝板双面电弧焊中焊缝形状的优化。

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摘要

The double-sided arc welding (DSAW) process has been shown to be one of the most effective arc welding techniques for producing aluminum tailor welded blanks. In a DSAW welding system, a plasma arc welding torch (PAW) is mounted above the aluminum sheet and a gas tungsten arc (GTAW) torch mounted below the sheet. The PAW torch is connected to the positive terminal of a square-wave variable polarity power supply and the GTAW torch to the negative terminal. The welding current flows from one torch through the sheet to the other torch. Thereby, simultaneously heating and melting both sides of the sheet and forming a full penetration weld. This unique and novel arc welding process can be used to produce high quality fusion welds between aluminum alloy sheets in butt joint configuration with sufficient cathodic cleaning on both sides at high-speed welding rates. The cost of the system is a fraction of traditional laser welding systems while the severity of welding defects such as undercut, underfill and drop-through can be decreased significantly when DSAW process is used. Complete elimination of these defects has not been reported yet. In this study, therefore, the effects of various DSAW process parameters on the weld bead shape in double-sided arc welding of 1mm thick AA5182 aluminum sheet in the butt joint configuration have been investigated with the goal of optimizing the final weld quality by decreasing the severity of welding defects and surface discontinuities. Specifically, the effects of total arc gap, torch type, and torch offset distance in the welding direction on both cathodic cleaning and final weld bead geometry were investigated. (Abstract shortened by UMI.)
机译：事实证明，双面弧焊（DSAW）工艺是生产铝拼焊板的最有效的弧焊技术之一。在DSAW焊接系统中，等离子弧焊炬（PAW）安装在铝板上方，而气体钨极电弧（GTAW）焊炬安装在铝板下方。 PAW焊炬连接到方波可变极性电源的正极，而GTAW焊炬连接到负极。焊接电流从一个焊枪穿过薄板流向另一个焊枪。由此，同时加热和熔化片材的两面并形成全熔透焊缝。这种独特而新颖的电弧焊工艺可用于在对接构型的铝合金板之间产生高质量的熔焊，并以高速焊接速率在两侧进行足够的阴极清洁。该系统的成本是传统激光焊接系统的一小部分，而使用DSAW工艺可以显着降低诸如底切，底部填充和掉线之类的焊接缺陷的严重性。尚未报告完全消除这些缺陷。因此，在本研究中，研究了各种DSAW工艺参数对1mm厚AA5182铝板在对接接头结构中进行双面电弧焊时焊缝形状的影响，目的是通过降低最终焊接质量来优化最终焊接质量。焊接缺陷的严重程度和表面不连续性。具体来说，研究了总电弧间隙，焊炬类型和焊炬在焊接方向上的偏移距离对阴极清洁和最终焊缝几何形状的影响。 （摘要由UMI缩短。）

著录项

  • 作者

    Anousheh, Samtin.;

  • 作者单位

    University of Waterloo (Canada).;

  • 授予单位 University of Waterloo (Canada).;
  • 学科 Engineering Industrial.;Engineering Mechanical.
  • 学位 M.A.Sc.
  • 年度 2006
  • 页码 162 p.
  • 总页数 162
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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