Patent ID: 6871521

Claim:
A method of operating a bending press having a machine frame comprising two stand sides spaced at a distance apart from one another, and a stationary press beam and a displaceable press beam displaceable in guide arrangements and driven by a drive system incorporating at least two drives each acting on the displaceable press beam at a respective force-application point, and having tool clamping devices for holding pressing tools on mutually facing compression surfaces of the press beams, and having a control unit connected to the drive system and a measuring device for detecting machine data during production of workpieces, the method comprising the steps of: detecting an actual pressing force exerted by each drive of the drive system on the displaceable press beam during a bending process for the workpiece; determining a relative position of the pressing tool or tools with respect to a longitudinal direction of the press beams on the basis of the pressing forces of the drives; determining a resultant bending force and a resultant bending line of the press beams; using an evaluation unit having a data memory for production and machine data to determine a displacement path for each of the drives at the respective force-application point of each drive on the basis of a computed position of the resultant bending force, wherein deformation data of the bending press are stored in the data memory, and the displacement paths of each drive are determined based on the deformation data stored in the data memory; and generating control signals for the drive system in the control unit, so as to displace actuator elements of the drives by the displacement paths determined for each drive.