| 摘要 |
<p>PURPOSE:To provide a method for automatically controlling plate thickness in a plate rolling, by which method a rolled plate excellent in the plate thickness accuracy is stably manufactured. CONSTITUTION:Reference is made to a plate rolling, in which a rolling mill is used that is provided with a roll space changing device 7 capable of arbitrarily changing the space S between an upper and lower rolling rolls 1 and with a deviation detector 4 for the plate thickness on the entrance side, and in which the plate thickness is controlled by adjusting the roll space while the deviation is measured of the thickness on the entrance side. A rolling reaction force which is imparted to the upper and lower rolls 1 in the middle of rolling is estimated by calculation. Then, the plate thickness value on the entrance side of the rolling mill, which is made the calculation element of this rolling reaction force, is obtained by an arithmetic unit 8, making a reference thickness value for the plate thickness deviation detector 4 on the entrance side of the rolling mill, and the controlling quantity is calculated of the space between the upper and lower rolls in the middle of rolling based on the output of this plate thickness detector 4, which quantity is then inputted in a device 8 for controlling the roll space so as to control the thickness of the plate.</p> |
