| 摘要 |
<p>A drilling device (100) comprising a die mold (120), a punch mold (130) having a punch, and a punch lifting mechanism (60) lifting the punch. The punch (140) comprises a punch body (142) and a punch head part (144), and the punch lifting mechanism (60) comprises punch head part holding parts (82, 84) capable of holding the punch head part. The drilling device further comprises a holding state control mechanism for holding the punch head part on the punch head part holding parts and releasing the held state of the punch head part by the punch head part holding parts. In the drilling device (100), since only the punch can be replaced, when the punch of the punch mold is worn, all spare parts for a drilling mold must not be prepared, that was required in a conventional drilling device. As a result, the drilling device can easily reduce drilling cost.</p> |
