| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-layer welding method, and a multi-layer welding equipment, wherein when performing the multi-layer arc welding of a workpiece with non-uniform gap width of a groove, the welding of a first pass is performed while preventing burn-through in the middle, the multi-layer welding of the same welding pass number is performed over the entire weld part, and it is not needed to change the welding condition in the middle of the same welding pass. SOLUTION: In the multi-layer welding method for performing the multi-layer arc welding of a workpiece with non-uniform gap of a groove in the direction of the weld line, the gap width of the groove is measured at a plurality of parts of the weld line to be set on the workpiece, the multi-layer welding conditions corresponding to the maximum value of the measured width of the gap at the plurality of parts are selected from the data corresponding to the preset multi-layer welding conditions, and the multi-layer arc welding is performed under the selected multi-layer welding conditions. COPYRIGHT: (C)2007,JPO&INPIT
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