Method for operating a rolling line, and computer program product for carrying out the method

A method for operating a rolling line having a total number (M) of rolling mill stands arranged one behind another in a rolling direction, for rolling a rolling material from a previous final rolling dimension to a new final rolling dimension, comprising:

• determining a first load redistribution for a first temporal phase (I) in form of first pass changes for some of the rolling mill stands with regard to the new final rolling dimension;
• in the first temporal phase (I), when viewed in the rolling direction, sequentially driving the first pass changes in the rolling mill stands corresponding to the first load redistribution during the rolling of the rolling material and forming of up to M−1 wedges in the rolling material,
• wherein each wedge-rolling rolling mill stand of the rolling mill stands-except for a first rolling mill stand-starts to roll a wedge caused by an associated one of the first pass changes in the rolling material at a point where a preceding rolling mill stand of the rolling mill stands has also started to roll a wedge, such that wedges rolled in the first temporal phase are superimposed in the rolling material, and
• wherein in the first load redistribution for a last of the rolling mill stands no pass change is provided;
• determining a second load redistribution for a second temporal phase (II) in form of second pass changes for at least the last of the rolling mill stands with regard to the new final rolling dimension;
• and
• in the second temporal phase (II), when viewed in the rolling direction, rolling the rolling material to the new final rolling dimension by sequential driving pass changes in those the rolling mill stands provided for by the second load redistribution.