| 摘要 |
The present invention provides a rolling mill of a plate or a sheet which eliminates rolling trouble due to warping of the rolled material and wavy shaped flatness defects running through the plate or sheet width direction such as "waviness", "full waves", and "small waves" by providing a pair of a top and bottom work rolls, a pair of electric motors independently driving the pair of rolls, and control means for controlling one electric motor using the roll rotational speed as a control target value and controlling the other electric motor using a drive torque as a control amount, without controlling a roll rotational speed, so that, as a control target, the rolling torque applied to the rolled material from the work roll driven by that electric motor becomes substantially constant, and a control technique of such a rolling mill of a plate or a sheet.
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