WELDING METHOD AND WELDING EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide a welding method and welding equipment capable of allowing a welding torch to correctly follow a weld line in the butt welding to form a weld bead by advancing/retracting the welding torch in the direction of the weld line direction while weaving the welding torch in a direction substantially orthogonal to the weld line. SOLUTION: In a butt arc welding method to form a welding bead by advancing/retracting a welding torch 2 in the direction of the weld line while weaving the welding torch in a direction substantially orthogonal to the weld line, the integrated welding current value and the integrated welding voltage value are compared with each other on the right and left sides with a weaving center C as a boundary during the equal phase period from the weaving center C of the period in which welding arcs 20a and 20b are generated between the welding torch 2 and groove surfaces of base metals 8a and 8b, and the weaving center of the welding torch 2 is moved in the direction in which the difference between the welding current values and the difference between the welding voltage values on the right and left sides are reduced. COPYRIGHT: (C)2005,JPO&NCIPI