| 摘要 |
PURPOSE:To weld simultaneously three members, and to shorten a welding work time by executing build-up welding to an annular groove which is formed by both opening end faces of the first member and the second member, and the outside peripheral surface of a partition member. CONSTITUTION:To an outside peripheral surface 52 of a partition member 30, the first member 32 is fitted until each bottom part abuts on each other, and also, from the opposite side of the first member 32, the second member 38 is fitted to a position where each opening end face 58, 60 of the first member 32 and the second member 38 stands close to each other. In this way, an annular groove 40 is formed by both the opening end faces 58, 60 and the outside peripheral surface 52 of the partition member 30. Subsequently, build-up welding is executed extending over the whole periphery in the inside of the annular groove 40 by executing electric discharge between a welding wire 64 supplied through a torch 62, and the annular groove 40. The inside of the annular groove 40 is nearly filled up, and an annular welding bead 42 which is welded to both opening end faces 58, 60 and the outer periphery face 52 of partition member 30 respectively, is formed. In this way, three members 30, 32 and 38 are fixed simultaneously and a pressure vessel 24 is obtained.
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