WELDING METHOD OF THIN COPPER SHEET, WELDING DEVICE OF THIN COPPER SHEET, AND MANUFACTURING METHOD OF DRAIN FOR WASTE WATER

摘要

PROBLEM TO BE SOLVED: To provide a welding method of a thin copper sheet capable of performing TIG welding to the thin copper sheet without causing thermal expansion or oxidation; and to provide a welding device of the thin copper sheet, and a manufacturing method of a drain for waste water.;SOLUTION: There is provided a welding method of a thin copper sheet for welding a peripheral edge part 11 of a hole part 10 of a copper flat plate 1 having the circular hole part 10 to the end 21 on one side of a cylindrical copper tube 2. In the welding method of the thin copper sheet, the copper flat plate 1 on the periphery 10a of the peripheral edge of the hole part 10 is sandwiched by an upper jig 31 and a lower jig 32 with a constant sandwiching pressure, and TIG welding is performed, while releasing excessive weld heat generated during welding.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2018,JPO&INPIT