| 摘要 |
PURPOSE:To facilitate the manufacturing work of a frame for motor by binding a metal plate to form a heat sink fin, and resistance seam welding the fin to a frame body. CONSTITUTION:A heat sink fin 11 which has a piece 12 to be bonded to a frame body 1 for a motor and an erected piece 13 and is formed in a U-shaped section by bending a metal plate. When the fin 11 is welded to the body 1, it is welded to the outer periphery of the body 1 formed in advance in a cylindrical shape, the contacting surface 11 of the fin 11 and the body 1 are interposed between electrodes 15 and 16, thereby performing a resistance seam welding. The electrodes 15, 16 are formed to rotate while pressurizing and energizing via roller electrodes. |
