| 摘要 |
<p>A method of forming an integral tubular projection (B) in a disk-shaped work (W) by spinning is provided. In the method, h = 0.1 to 0.5t, d = 0.25 to 0.94D, T = 0.5 to 7h, and V = 0. 029 to 0.234 pi D<2>h where h is a depth by which a forming roller (4) cuts into the work, t is a thickness of the work, d is an outer diameter of the tubular projection, D is a diameter of a circle including a point where the spinning by the forming roller starts, T is a thickness of a wall of the tubular projection, and V is a volume of the tubular projection. A product produced by the above method is also provided. <IMAGE></p> |
