DEVICE AND METHOD FOR PREVENTING A TOOL FROM BREAKING DURING FINE BLANKING AND/OR FORMING A WORK PIECE

摘要

A device and method are provided for preventing a tool from breaking during fine blanking and/or forming in a press. The device includes a fine blanking head positioned above a ram that carries out a stroke movement. The fine blanking head includes, among other things, a main cylinder retaining a V-shaped projection piston, a touch piston, several V-shaped projection pins, a main plate covering the main cylinder and a touch table to which the tool can be connected. Pressure provided by a hydraulic system is introduced to the device in distinct regions. Gaps between certain device components are maintained and monitored for purposes of determining the undesirable presence of foreign objects in the press operating path. If a sensor determines that the gaps are not maintained then the computer which operates valves that supply the pressure from the hydraulic system will shut the press down.