Patent ID: 8186195

Claim:
An operating method for a multi-stand rolling mill train, wherein a strip is fed to a rolling stand in question of the rolling mill train with a known input thickness and exits the rolling stand in question with a strip thickness, the method comprising: detecting measurement variables characteristic of the inlet-side velocity of the strip and the outlet-side velocity of the strip with respect to the rolling stand in question, determining the inlet-side velocity of the strip and the outlet-side velocity of the strip with respect to the rolling stand in question on the basis of the detected measurement variables, determining the strip thickness with respect to the rolling stand in question on the basis of the input thickness, the inlet-side velocity of the strip and the outlet-side velocity of the strip, taking further measures in the light of the determined strip thickness, wherein at least one of the measurement variable for the inlet-side velocity of the strip is the roller circumferential velocity of the rolling stand arranged immediately prior to the rolling stand in question and the measurement variable for the outlet-side velocity of the strip is the roller circumferential velocity of the rolling stand in question, modeling the peripheral precession of the strip in the respective rolling stand, and determining the respective velocity of the strip on the basis of the respective roller circumferential velocity and the peripheral precession of the strip in the respective rolling stand.