Patent ID: 7086582
Filing Date: 2006-08-08
Classification: B21D,B26F,Y10T

Abstract:
1. A punch press for sequentially punching holes in a workpiece, comprising: an upper die comprising a punch set, a punch holder located below the punch set, a punch movably received in the punch holder, a punch pad arranged between the punch set and the punch holder, a stripper movably secured below the punch holder, and adjusting means for adjusting the upper die so that the punch is selectively in an operational state or in a non-operational state, the punch being extendable through the stripper, the punch pad defining a first cavity in a top thereof, and a second cavity in a bottom thereof in communication with the first cavity; and a lower die cooperating with the upper die to machine the workpiece, wherein when the upper die is moved to the lower die and the punch is in the operational state, the punch can punch the workpiece, and when the upper die is moved to the lower die and the punch is in the non-operational state, the punch cannot punch the workpiece; the adjusting means comprises a first plate movably received in the first cavity and comprising at least one first protrusion, and a second plate movably received in the second cavity and arranged below the first plate, the second plate comprising at least one second protrusion; and when the at least one first protrusion opposingly abuts the at least one second protrusion, the punch is in the operational state; when the at least one first protrusion does not opposingly abut the at least one second protrusion, the punch is in the non-operational state.