| 摘要 |
<p>PURPOSE:To discharge cutting chips smoothly by providing a vibration generating means which vibrates a base for which a laminated plate is placed and supported vertically. CONSTITUTION:A laminated plate 2 is placed and supported on a base 1, a drill 3 is driven to lower and feed the drill 3 at a fixed speed so as to make a through hole in the laminated plate 2. At this time, the base 1 is vibrated vertically by a vibration generating means 4, so it is possible to discharge chips generated in drilling work smoothly.</p> |
