Cold rolling mill rolling condition setting method, cold rolling method, steel sheet manufacturing method, cold rolling mill rolling condition setting device, and cold rolling mill

A cold rolling mill rolling condition setting device, which is a device of setting a target rolling condition of a cold rolling mill when a roll target material is rolled by cold rolling using a prediction model that predicts a post-cold rolling state of the roll target material,

• the prediction model being generated with an explanatory variable and an objective variable,
• the explanatory variable being first multi-dimensional data obtained by joining past rolling performance data including pre-cold rolling data of a roll material on an entry side of the cold rolling mill in a time direction, and
• the objective variable being post-cold rolling data of the roll material on a delivery side of the cold rolling mill,
• the device comprising a processor comprising hardware, the processor being configured to:
• estimate a post-rolling shape of the roll target material on the delivery side of the cold rolling mill by inputting, to the prediction model,
• second multi-dimensional data generated from information including the pre-cold rolling data of the roll target material on the entry side of the cold rolling mill and
• a target rolling condition of the cold rolling mill;
• and
• change the target rolling condition of the cold rolling mill such that the estimated post-rolling shape of the roll target material satisfies a predetermined condition.