| 摘要 |
<p>PURPOSE:To improve a controlling accuracy of steel sheet dimensions, by providing a measuring device of the sheet thickness or sheet width of a steel sheet on the downstream of a rolling mill in steel sheet rolling, and controlling a gap of rolling rolls by a controlling signal depending on the measured signal and a sheet thickness correcting signal. CONSTITUTION:In rolling a steel sheet 1 by a rolling mill 2, the sheet thickness of the sheet 1 is measured by a sheet thickness measuring device 4 provided to the downstream of the mill 2 to input a deviation signal between the measured value and an aimed set value to a controlling device 12. Further a speed signal outputted from a measuring device 8 for a running speed of the sheet 1 and a signal 11 of sheet thickness correcting quantity outputted from a storage device 10 of sheet thickness correcting quantity are inputted to the device 12, and at the same time, a sheet thickness correcting signal 13 is fed to the device 10. As a part of the steel sheet just below the device 4 is not subjected to a sheet thickness correction by the mill 2, a screw-down driving signal 7 corrected by the device 12 is outputted to control the roll gap of the mill 2 by means of a screw-down driving device 3 in order to make the thickness of a steel sheet just below the mill to be the aimed set value. The width of the sheet is also controlled in the same way.</p> |
