GAS SHIELDED ARC WELDING METHOD AND WELDING MACHINE FOR GALVANIZED STEEL SHEET AND GALVANIZED STEEL PRODUCT WELDED BY WELDING MACHINE

摘要

PURPOSE: To suppress generation of porocity as the welding defect generated at gas shielded arc welding of galvanized steel sheet. ;CONSTITUTION: When a galvanized steel sheet is welded in the gas shielded arc welding method, generation of porocity is suppressed by providing a gas flow having a flow rate of ≥26l/min. A welding machine 4 is provided with a gas flow setting device 1 and gas flow controlling device 2, by driving the gas flow controlling device 2 through gas flow setting device 1, supression of bubble generation is controlled by a welding machine 4.;COPYRIGHT: (C)1994,JPO