Patent ID: 6601422
Filing Date: 2003-08-05
Classification: B21B

Abstract:
A method of operating a rolling mill train for producing structural shapes, comprising the steps of:(a) rolling a workpiece in a succession of mill stands, each equipped with a plurality of working rolls engaging said workpiece to reduce a cross section thereof in a configuration of a structural shape to be produced, each of said mill stands having a plurality of adjustable operating parameters determining the rolling process in the respective mill stand; (b) detecting a profile of a structural shape produced by said succession of mill stands and comparing the detected profile with a set-point profile corresponding to a structural shape to be produced; (c) deriving from the comparison of the detected profile with the setpoint profile respective corrective setpoint values for each of said parameters determined by deviation of the detected profile from the setpoint profile; (d) weighting each of said corrective setpoint values with a weighting factor specific to the respective mill stand to produce weighted corrected setpoint values for each of said parameters; and (e) adjusting the operating parameters of each of said mill stands with the respective weighted corrected setpoint values.