LASER CUTTING PROCESSING METHOD OF PLATED STEEL PLATE, LASER CUTTING PROCESSED ARTICLE, THERMALLY CUTTING PROCESSING METHOD, THERMALLY CUTTING PROCESSED PRODUCT, SURFACE TREATMENT STEEL PLATE, AND LASER CUTTING METHOD AND LASER PROCESSING HEAD

摘要

PROBLEM TO BE SOLVED: To provide a laser cutting processing method, a laser cutting processed article and a laser cutting processing device which causes a plating layer-contained metal molten and/or evaporated on an upper surface to flow onto a cut surface and, thereby, coats the cut surface with the plating layer-contained metal when performing laser cutting processing of plated steel plate.SOLUTION: When irradiating an upper surface of plated steel plate W with a laser beam LB to perform laser cutting processing in a laser cutting processing method of plated steel plate, plating layer-contained metal molten and/or evaporated by irradiation of the laser beam LB is caused to flow onto a cut surface of the plated steel plate W and covers the cut surface with plating layer-contained metal by means of assist gas ejected to a laser processing part.SELECTED DRAWING: Figure 1