| 摘要 |
PURPOSE:To remove obstacles in attaching a piercing punch by connecting a sliding plate in a holder and a pad by a member which penetrates an upper holder and further interposing elastic bodies between the sliding plate in the holder and a fixed plate. CONSTITUTION:A desired die is composed by connecting a movable plate 24 in a holder 21 and a pad 22 by connecting members 23 which penetrate the upper holder 21 and further interposing elastic bodies 25 between the plate 24 and a fixed plate 26. Next, a ram 2 is lowered to bring the pad 22 into contact with a work piece W placed on a punch 8, and sectional dies 6 trim the work piece W in corporation with the punch 8 while pressing the piece W by an elastic force of the compressed elastic bodies 25, and piercing punches 9 perform punching in corporation with button dies 11. Thus, even in an upper die provided with a large number of piercing punches, a required number of elastic bodies for energizing a pad 22 can be arranged regardless of the positions and the number of punches. |
