| 摘要 |
PURPOSE:To hold a work horizontally and to prevent drooping and curving, by constituting a punch of a floating structure, and controlling its stroke to the minimum comparing with an inner bolster. CONSTITUTION:When an inner bolster 5 is in a non-operating state, namely, a bottom dead center, a punch 16 is separated completely from the inner bolster 5, is supported by a holder spacer 7, and also its pressure face top part 16a and a pressure face top part 14a of a blank holder 14 are positioned on the almost same plane. Accordingly, a panel work W does not droop but is held in an almost horizontal state. When the inner bolster 5 rises, contacts with urethane rubber 10, and thereafter, rises further, the rubber 10 is compressed and the punch 16 is pushed up, and in the end, the inner bolster 5 adheres closely to a punch spacer 8, and prescribed drawing is executed between the punch 16 and a die 2. |
