SHIELD GAS SUPPLY DEVICE OF LASER PROCESSOR, AND LASER PROCESSOR

摘要

PROBLEM TO BE SOLVED: To jet a shield gas efficiently to a processing workpiece when performing laser processing with a laser processor.SOLUTION: A shield gas supply device comprises: a ring-shaped part 8 arranged at a position which surrounds a laser beam L that irradiates a processing workpiece M from a laser processor 1; and a supply pipe 7 that supplies a shield gas to the ring-shaped part 8. The ring-shaped part 8 has a transfer path 15 for the shield gas supplied from the supply pipe 7 in a circumferential direction of the ring-shaped part 8. The transfer path 15 is arranged in a multi stage with respect to the workpiece M, and is provided with holes 12 to jet the shield gas so as to form swirl flows circumferentially in an inner peripheral part 11 of the ring-shaped part 8.