박판용접 갭 브리징 능력 향상을 위한 Super-TIG 용접 프로세스 개발

Abstract

In high speed sheet GMAW for automobile, welding failures take place, including burn-through, gap bridging fault, bead position fault, slag, spatter and arc start instability. In high speed welding, arc stability is an important factor for quality, and the arc may become unstable, even with a little change of the wire electrode, and if the arc stability becomes worse, welding failure rate, also, increases. This study aims to develop and apply a new welding process, suitable for high-speed welding for sheet using Super-TIG welding. Super-TIG welding uses a non-consumable electrode, and the arc is separated from the feed, so it has excellent arc stability. In addition, it uses C-type filler metal, So it has a high deposition rate and is suitable for high-speed welding. Super-TIG welding does not generate spatter and slag, so it can get clean, uniform beads. It can also extend the width of the filler metal significantly larger than the wire of common metal, so it has a big gap bridging ability. Using these characteristics, the applicability of Super-TIG welding to the sheet welding process was examined.