YAG LASER WELDING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a YAG laser welding method by which a defectless welding is performed by a YAG laser welding of an inclined portion of a galvanized steel plate which is almost perpendicular.

SOLUTION: A welding head 20 is placed so that the end of the head is inclined to the forwarding side of welding procedure by a prescribed angle with respect to a direction perpendicular to a welded zone. The flow rate of a shield gas is decreased by a prescribed amount from an appropriate flow rate for a welding in which the welding head is placed perpendicularly to a horizontal welding zone.

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