| 摘要 |
<p>At the time of die clamping, an upper die (18) abuts against a lower die (14) while being rotated by drive gears (42a to 42d) and a driven gear (40) with respect to screws (44a to 44d), and a belleville spring (60) applies a die clamping force on a stock (W). Subsequently, at the time of die opening, the upper die (18) is rotated with respect to the screws (44a to 44d) supported by coil spring (54a to 54d) simultaneously with the die opening in an action opposite to the above, so that the die is released from a spiral bevel type gear (72).</p> |
