| 摘要 |
PURPOSE:To prevent a weld zone from enlarging, and to reduce generation of a crack by forming a notch part in a welding part of a plate-like member end part, inserting and holding both side faces of the end part by other member, supplying a welding material into a formed recessed space, and executing a plasma welding. CONSTITUTION:A notch part 10a is formed in a part to which spot welding is executed, of a disk member 10, the disk member 10 is inserted and held by providing a cup-shaped member 12 on both side faces of the end part of the disk member 10, and a joining part A which has formed a recessed space 16 opened to the outside is formed by the notch part 10a and both cup-shaped members 12. A welding torch 14 of a plasma arc welding machine is pointed toward the recessed space 16 from the outside of the joining part A, maintaining said state, and a plasma-like high temperature gas is projected, also a welding material 18 is supplied into the recessed space 16 from the side, the welding material 18 and the disk member 10 and the end part of the cup-shaped member 12 are welded, and the members 10, 12 are joined. |
