| 摘要 |
PURPOSE:To reduce the size of the construction part for piercing of a press die and to permit easy design of the press die in the press die for piercing by connecting a pressure receiving and driving part to be pressed by the relative motion of the press die and a working tool by means of at least an integral push-pull wire. CONSTITUTION:When an upper holder 23 is brought down, a pad 25 presses and fixes the panel 2 on a table 13a and at the same time the cam surface 24a of a driving cam 24 descends while pressing the cam surface 16a of a sliding cam 16. The pressing force exerted on the cam 16 in this stage slides the cam 16 toward the left in a cam casing 17 and is at the same time transmitted via the main shaft 18a of a push-pull wire 18 to a sliding block 14 and therefore the block 14 is advanced to slide in a block casing 15, by which a piercing punch 16 is simultaneously advanced to blank the panel 2 between the same and a button die 9, thereby piercing the panel. |
