| 摘要 |
PURPOSE:To surely weld both flanges without any drop of a molten metal by welding both flanges at the peripheral wall part and bottom wall part of the pulley composed of a thin plate by pinching them with nonconductive and heat resistant annular pressing plates from the right and left respectively. CONSTITUTION:Flanges 2a, 3a are pinched by arranging annular ceramics pressing plates 10, 11 at the outer side of the both of the flange 2a at the peripheral wall part 2 and the flange 3a at the bottom wall part 3 of a pulley 1. The outer peripheral faces 2c and 3c of the flange are located at the inner side than the outer peripheries 10a, 11a of the pressing plate. Therefore, in case of the welding of both flanges outer peripheral faces 2c and 3c, the drop of a molten metal is prevented by the pressing plates 10, 11 without the bead with being widened and the blank parts 2b, 3b of the flange are surely welded by heating them sufficiently.
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