Method and computer program product for setting the bending of at least one straightening roller of a roller straightening machine

A method for adjusting a roller straightening machine, comprising:

• arranging lower straightening rollers to be spaced apart from each other in a transport direction, lower supporting rollers situated under the lower straightening rollers, and actuating devices for adjusting the lower supporting rollers such that stresses are produced in the lower straightening rollers,
• arranging upper straightening rollers to be spaced apart from each other in the transport direction above the lower straightening rollers, and upper supporting rollers situated above the upper straightening rollers,
• adjusting and controlling the lower supporting rollers by the actuating devices such that stresses are produced in the lower straightening rollers,
• storing in a control system limiting values (vMA, vMI) with respect to the stresses produced in the lower straightening rollers,
• actuating the lower supporting rollers to obtain an actual stress curve showing a profile of stresses produced by the upper and lower straightening rollers under an elastic deformation resistance of the upper and lower straightening rollers,
• calculating an actual bending line from the actual stress curve under consideration of the elastic deformation resistance of the upper and lower straightening rollers, and
• running the lower supporting rollers within the limiting values (vMA, vMI),
• wherein, in an event of a change in an adjustment of one of the lower supporting rollers, maxima (MA) and minima (MI) of the stresses produced in the lower straightening rollers are calculated and it is checked whether the maxima (MA) and minima (MI) lie within the limiting values (vMA, vMI) and, if this is not the case, a further adjustment of at least one of the supporting rollers is changed automatically in accordance with a predefined algorism stored in the control system such that the stresses produced in the straightening rollers remain within the limiting values (vMA, vMI).