PURPOSE: To provide the method of an electrogas arc welding and its device which enables high-quality and highly efficient welding to be achieved, without deteriorating the quality of a material to be welded, against a thick vertical butt joint.
CONSTITUTION: The groove 2 of a vertical butt joint whose interval on the front face side of a thick material 1 to be welded is wider than that of its back face side is provided with two welding wires 5a, 5b arranged in the thickness direction; the heat source range of an arc by means of the welding wire 5b on the front face side is made larger than that by means of the welding wire 5a on the back face side; and also, both welding wires 5a, 5b are oscillated in the oscillating direction S along the thickness for welding.
| JPS5861965 | NARROW GROOVE AUTOMATIC WELDING METHOD IN ALL POSITIONS |
| WO/2023/138060 | DOUBLE-TRACK WELDING SYSTEM |
| JP2009006368 | GAS SHIELDING AND ARC WELDING METHOD |
FUKUDA MASAKATSU
TSUKIMOTO TADASHI
KONO TAKAYUKI
GODA HOZUMI
