Patent ID: 6519992
Filing Date: 2003-02-18
Classification: B21D,Y10T

Abstract:
A method of operating a metal forming press to perform a metal forming process comprising:placing a workpiece to be deformed in a rigid press frame having a support tool with a water chamber die, at least one ram tool, a hold down device, and a plurality of closing cylinders; applying a hold-down force generated by the hold-down device to the workpiece to preload the workpiece against the support tool; applying a ram force generated by the at least one ram tool to the workpiece in a first direction parallel to the hold down force; applying closing cylinder forces generated by the closing cylinders to the support tool in a second direction opposite to the hold down force and the closing cylinder forces; applying water chamber die forces generated by the water chamber die on the workpiece; determining a disturbing force resulting from the applying of the ram force to the workpiece; and compensating for the disturbing force by changing the closing cylinder forces applied to the support tool.