Method for adjusting a discharge thickness of rolling stock that passes through a multi-stand mill train, control and/or regulation device and rolling mill

A rolling mill comprising:

• a multi-stand mill train for rolling metallic rolling stock, comprising:
• a plurality of roll stands;
• an open-loop and/or closed-loop control device comprising instructions stored in non-transitory computer readable media and executable by a processor to:
• (a) execute a predetermined first pass sequence, including:
• setting the plurality of roll stands of the mill train to set a first discharge thickness;
• and
• rolling a first section of the rolling stock to the first discharge thickness,
• (b) while continuing to roll the rolling stock, execute a transition from the predetermined first pass sequence to a predetermined second pass sequence, including:
• adjusting one or more of the plurality of roll stands of the mill train to transition from the first discharge thickness to a second discharge thickness different from the first discharge thickness;
• wherein the adjusting of each respective roll stand is performed during the rolling of a defined transition section of the rolling stock by the respective rolling stand;
• regulating a rolling force for at least one of the rolling stands during the rolling of the respective transition section;
• and
• throughout the transition, adjust a feed rate of the rolling stock into the mill train as a function of a discharge rate of the rolling stock from a unit which is arranged upstream of the mill train in the direction of mass flow, such that the discharge rate of the rolling stock from the unit upstream of the mill train is not affected by the transition from the first discharge thickness to the second discharge thickness;
• and
• throughout the transition, automatically adjust a feed rate of the rolling stock into the mill train to actively compensate for any chances in a discharge rate of the rolling stock from a unit which is arranged upstream of the mill train in the direction of mass flow;
• and
• (c) after completing the transition, execute the predetermined second pass sequence, including rolling a second section of the rolling stock to the second discharge thickness, and
• during the rolling of the transition section, automatically check compliance with technical plant restrictions, and if the restrictions are infringed or are expected to be infringed, automatically interrupt the transition from the operation of the mill train according to the first pass sequence to the operation of the mill train according to the second pass sequence, wherein the technical plant restrictions comprise predefined technical restrictions that allow production of a desired product according to an operational schedule of the plant.