| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrode pair for one side welding capable of preventing a metal part from being locally overheated. <P>SOLUTION: An outer electrode 12 is arranged to surround a shaft-like inner electrode 11. When the plurality of the metal parts 2, 3 are joined by welding, the inner electrode 11 and the outer electrode 12 are pressed against the upper face 14 of the metal part 2, electric power is distributed through the metal members 2,3 between the inner electrode 11 and the outer electrode 12. The outer electrode 12 comes into contact with the upper face 14 of the metal part 2 at a plurality of positions. A plurality of parts coming into contact with the upper face 14 of the metal part 2 at the outer electrode 12 are movable in a direction intersecting the upper face 14 of the metal part 2 by the deformation of the outer electrode 12. <P>COPYRIGHT: (C)2012,JPO&INPIT |
