| 摘要 |
<p>A press as provided for stamping parts from a sheet of stock material. The press includes a frame having a fixed platen secured to the frame against movement. A movable platen is movably mounted to the frame between a retracted position in which the movable platen is spaced from the fixed platen by a distance sufficient to receive the sheet of stock material between the platens , and a closed position in which the stock material is sandwiched between the platens to form the part. A drive wheel is rotatably mounted to the frame about an axis parallel to the axis of movement of the movable platen. A plurality of cam members on the drive wheel engage cam followers on the movable platen during rotation of the wheel in order to move the movable platen between its retracted and its closed position. Each cam member includes a dwell portion which retains the movable platen in its closed position for a predetermined angular rotation of th e wheel.</p> |
