METHOD FOR WELDING MEDIUM THICKNESS PLATE AND WELDING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a welding method for a medium thickness plate, by which the height of reinforcement of weld in a welded bead becomes almost constant regardless of the plate thickness and the fluidity of fused metal and a welding device is simple and the manufacturing cost is low, and a welding device. ;SOLUTION: This welding method is the one arranging the medium thickness plates 2a, 2b with a gap 3 and also, arranging a backing metal 4 at the lower part of the gap 3 to weld the medium thickness plates 2a, 2b by forming molten pool 7 into the gap 3. In such a case, a jig 5 plugging the molten pool 7 is fitted into the gap 3 and the welding is executed while shifting the jig 5 along the gap 3 together with the molten pool 7.;COPYRIGHT: (C)1998,JPO