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Development of Laser-Rotating An Hybrid Welding Process  

Kim, Cheol-Hee (Advanced Joining Technology Team, KITECH)
Chae, Hyun-Byung (Advanced Joining Technology Team, KITECH)
Lee, Chang-Woo (Advanced Joining Technology Team, KITECH)
Kim, Jeong-Han (Advanced Joining Technology Team, KITECH)
Rhee, Se-Hun (School of Mechanical Engineering, Hanyang University)
Publication Information
Journal of Welding and Joining / v.24, no.1, 2006 , pp. 88-92 More about this Journal
Abstract
Laser-rotating arc hybrid welding was introduced by combining $CO_2$ 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 we. The welding parameters were selected to reduce spatter generation and ensure sound weld beads fur 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 2mm joint sap, with no adjustment of CTWD(Contact tip-to-workpiece distance) and electrode diameter.
Keywords
Laser-arc hybrid welding; $CO_2$ laser; Rotating arc; Bead shape;
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