| 摘要 |
Pressing sheet material with a device comprising a cushion (6) composed of an elastic material, comprising disposing a sheet blank (3) to be formed on a support constituting a lower peripheral blank holder (2a), applying an upper blank holder (1a) on the peripheral portion of the sheet blank (3) for preforming the blank, then applying a punch (4) on the central portion of the sheet blank (3) for effecting the final forming, wherein, in the course of the final forming, the excess volume of the elastic cushion (6), produced by the application of the punch (4), relative to the volume determined by the surface area of the finished part to be obtained, is absorbed.
|
