Patent ID: 7168277
Filing Date: 2007-01-30
Classification: B21D

Abstract:
1. A press adapted for machining a workpiece, in particular for embossing and/or punching metal plates, the press comprising: a pressing tool comprising a first tool part mounted in a first tool mounting and a second tool part mounted in a second tool mounting, the first part and the second part located so as to be on opposing sides of the workpiece during machining of the workpiece; a pressing drive adapted to move the first part and the second part toward and away from each other in a stroke direction during machining of the workpiece; first and second reference elements, wherein the reference elements are moveable, by the pressing device, into a relative position that corresponds to a predetermined relative position of the first tool part and the second tool part as mounted in the mountings; a control pulse generator that generates a control pulse when the first and second reference elements are moved into the relative position, wherein at least part of the control pulse generator is mounted on one of the reference elements, that is provided instead of one of the tool parts and the relative position of which is to be detected, or on one of the mountings, such that the control pulse generator generates the control pulse automatically when the first and second mountings move into the relative position; a switch that is activated by the control pulse; and a detection unit that is activated by activation of the switch to detect the relative position of the first and second reference elements.