Cold rolling rolled stock in a mill train with multiple roll stands

A method for the cold rolling of rolled stock in a rolling train having multiple rolling stands through which the rolled stock passes in succession in multiple rolling passes, wherein

• an upper limit temperature and/or a lower limit temperature for a temperature of the rolled stock is predetermined for at least one rolling pass,
• and the rolled-stock temperature is open-loop and/or closed-loop controlled by at least one of the following open-loop or closed-loop control measures in such a way that the rolled-stock temperature in the at least one rolling pass does not exceed the upper limit temperature predetermined for the rolling pass and/or does not fall below the lower limit temperature predetermined for the rolling pass:
• heating the rolled stock to a run-in temperature by means of a heating device before the first rolling pass, wherein the heat output of the heating device is set,
• cooling the working rollers of at least one rolling stand by applying a roller coolant to the working rollers, wherein a flow of the roller coolant and/or a pressure of the roller coolant is open-loop or closed-loop controlled, wherein the amount of heat discharged from the working rollers when the working rollers are being cooled and the amount of heat discharged from the rolled stock to the working rollers are determined,
• cooling the rolled stock between at least two rolling passes which follow one another by applying a rolled-stock coolant to the rolled stock, wherein a flow of the rolled-stock coolant and/or a pressure of the rolled-stock coolant is open-loop or closed-loop controlled and the amount of heat discharged from the rolled stock to the rolled-stock coolant when the rolled stock is being cooled is determined,
• applying a lubricant to the working rollers or/and to the rolled stock in at least one rolling pass, wherein a flow of the lubricant and/or a pressure of the lubricant is open-loop or closed-loop controlled and a frictional power loss in the rolling gap of the respective rolling stand is determined,
• compiling and implementing a pass sequence distribution for the pass reductions of the individual rolling passes, wherein the deformation heat of resulting from the plastic deformation during the pass reduction of the rolled stock is determined from the pass reduction at the respective rolling stand and from the material properties of the rolled stock,
• open-loop or closed-loop controlling a rolling speed at which the rolled stock passes through the rolling train, wherein the resulting frictional power loss in the respective rolling stand is determined.