[Research Papers] Development of Laser - Rotating Arc Hybrid Welding Process

Kim, Cheol-Hee; Chae, Hyun-Byung; Lee, Chang-Woo; Kim, Jeong-Han; Rhee, Se-Hun

Journal of KWJS 2006;24(1):88-92.
Published online April 3, 2006.

[연구논문] 레이저 - 회전 아크 하이브리드 용접공정의 개발

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[Research Papers] Development of Laser - Rotating Arc Hybrid Welding Process

Cheol-Hee Kim, Hyun-Byung Chae, Chang-Woo Lee, Jeong-Han Kim, Se-Hun Rhee

Abstract

Laser-rotating arc hybrid welding was introduced by combining CO₂ laser and rotating gas metal arc welding. While the arc rotation enhances the weld pool motion, it reduces the undercut formation which is one of most critical weld defects in the conventional laser-arc hybrid welding. This research investigated the bead characteristics according to the welding parameters such as frequency of rotation, welding voltage, shielding gas composition and interspacing distance between laser and arc. The welding parameters were selected to reduce spatter generation and ensure sound weld beads for bead welding and butt welding with various joint gaps. Gap bridging ability was improved, such that the sound weld beads were achieved for butt joint with up to 2㎜ joint gap, with no adjustment of CTWD(Contact tip-to-workpiece distance) and electrode diameter.