| 摘要 |
PROBLEM TO BE SOLVED: To develop a spigot projection welding tool for forming a spigot projection at a correct position in a correct shape even in an execution site. SOLUTION: This spigot projection welding tool comprises a two-split ring-like metal piece 40 having a circumferential guide groove 44 on an outer surface, a first truck 48 which is movable along the circumferential guide groove 44 of the two-split ring-like metal piece, and fitted to one end of a rod 46 disposed in the diameter direction of a tube at an end face of a spigot tube 9, a second truck 49 which is movable along the circumferential guide groove 44 of the two-split ring-like metal piece 40, supported by the other end side of the rod 46 in a slidably movable manner in the axial direction of the rod 46, and constantly and repulsively energized toward the center direction of the spigot tube 9 by an elastic member 61, and a welding torch 54 of the spigot projection fitted to the first truck 48 toward an outer surface of the spigot tube 9. COPYRIGHT: (C)2004,JPO
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