Patent ID: 8516869

Claim:
An operating method for a multi-stand cold-rolling mill train for rolling a strip, comprising: detecting an actual rolling force of a last rolling stand of the cold-rolling mill train and feeding it to a force controlling device by means of a rolling force detection device, determining by the force controlling device at least one manipulated variable on the basis of the actual rolling force fed thereto and a desired rolling force, and outputting said variable, detecting an actual thickness of the strip and feeding it to a thickness controlling device by means of a thickness measuring device arranged immediately downstream from the last rolling stand of the cold-rolling mill train, wherein the thickness controlling device acts on the last rolling stand of the cold-rolling mill train, detecting a further actual thickness of the strip by means of a further thickness measuring device arranged immediately upstream from the last rolling stand of the cold-rolling mill train, using speed detection devices to detect speeds at which the strip runs into the last rolling stand of the cold-rolling mill train and runs out of the last rolling stand of the cold-rolling mill train, feeding the detected speeds and a predetermined final thickness, which the strip should have downstream from the last rolling stand of the cold-rolling mill train, to a setpoint value determination device, determining by the setpoint value determination device a desired thickness as a function of the variables fed thereto, and feeding the desired thickness as a setpoint value and the further actual thickness as an actual value to a further thickness controlling device acting on the penultimate rolling stand of the cold-rolling mill train.