METHOD OF VERTICAL POSITION WELDING, AND STRUCTURE WELDED BY VERTICAL POSITION WELDING

摘要

PROBLEM TO BE SOLVED: To provide a method of vertical position welding, which method can efficiently carry out a welding operation while suppressing the increase of a cost for welding even thick steel plates and also maintaining the strength by reducing a heat input, and further to provide a structure welded by the method of vertical position welding.;SOLUTION: In the method of vertical position welding, an I-shaped groove having a required narrow groove gap is formed between a pair of thick steel plates (1, 1) arranged in the vertical position, and a welding wire (30) projecting from a welding torch (20) of an arc welding machine is inserted into the I-shaped groove from diagonally above with respect to the direction of the thickness of the thick steel plates. Then, the weld metal is laminated in the I-shaped groove by reciprocating the tip end of the welding wire delivered from the tip end of the welding torch in the direction of the thickness of the plates in the I-shaped groove by rocking the welding torch, and by moving the arc welding machine from below upward along the thick steel plates by the thickness of two layers of the welded metal for one reciprocation during one reciprocation of the tip end of the welding wire.;COPYRIGHT: (C)2007,JPO&INPIT