Patent ID: 8676371

Claim:
An operating method for a rolling train for the rolling of a strip wherein the rolling train comprises a number of main rolling stands and a coiler arranged downstream of the main rolling stands, the main rolling stands respectively having work rolls and at least backing rolls, the method comprising the steps of: feeding data of the strip, which establish at least an overall pass reduction other than zero by which an initial thickness of the strip is to be reduced in the rolling train, to a control device of the rolling train, determining by the control device individual pass reductions for the main rolling stands on the basis of the data fed to it, controlling by the control device the main rolling stands and the coiler in such a way that the strip is rolled in the main rolling stands in a way corresponding to the individual pass reductions determined and is then coiled up by the coiler, determining by the control device the individual pass reductions in such a way that the individual pass reduction of the main rolling stand arranged directly upstream of the coiler is zero, determining by the control device a rolling force for the main rolling stand arranged directly upstream of the coiler that both (a) lies above a lower limit to provide a tension on the outlet side of the particular main rolling stand that is isolated from, and lower than, a tension on the inlet side of the particular main rolling stand and (b) lies below an upper limit such that the strip runs through this main rolling stand without undergoing forming, and controlling the main rolling stand arranged directly upstream of the coiler based on the determined rolling force, and pivoting at least one work roll of the main rolling stand arranged directly upstream of the coiler such that the respective rotational axes of at least two work rolls of this main rolling stand are non-parallel to each another, such that the strip runs through this main rolling stand without undergoing forming.