LASER BEAM WELDING METHOD, WELDING MACHINE THEREFOR, AND BUTT-WELDED JOINT

Abstract: a laser beam welding method is disclosed that includes irradiating a gap between butted steel sheets with a laser beam while supplying a filler to the gap so as to cause butted portions of the steel sheets and the filler to melt and solidify, and thus form a weld metal, thereby melting and joining the butted steel sheets. the method includes delivering the laser beam while rotating it across the gap between the steel sheets and controlling the ratio of the amount of the filler supplied to the gap per unit time to the volume of the gap between the steel sheets to be welded per unit time to be within a predetermined range. also disclosed are a welding machine used for the method and a weld joint obtained with the method.

Inventor(s): Asato HARA, Katsutoshi TAKASHIMA

CPC Classification: B23K26/24 (SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM (making metal-coated products by extruding metal ; building up linings or coverings by casting ; casting by dipping ; manufacture of composite layers by sintering metal powder ; arrangements on machine tools for copying or controlling ; covering metals or covering materials with metals, not otherwise provided for ; burners ))

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