| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize a highly accurate gaugemeter formula and to improve the accuracy of thickness control by estimating the error in gaugemeter thickness at each rolling stand by using the measured value of a thickness gage and continuously correcting the gaugemeter formula at each rolling stand. SOLUTION: In a gaugemeter thickness arithmetic unit 11 of the rolling stands 1, 2, the gaugemeter thickness is calculated over the entire length of a material W to be rolled during rolling based on rolling load and the opening degree of roll. In a mass flow thickness rithmetic unit 12 of the final rolling stand 1, the mass flow thickness is calculated over the entire length after the tip of the material W to be rolled reaches the thickness gage 3 by the mass flow formula from the speed of a rolled stock and actual thickness. In a device 10 for calculating the error in the gaugemeter thickness, the error in the gaugemeter thickness is calculated from the gaugemeter thickness and the mass flow thickness and, in an arithmetic unit 13 for gaugemeter correction, the gaugemeter correction value is decided based on the calculated error in gaugemeter thickness. In a thickness controller 5, the opening-degree control of the rolling roll is executed by adding the correction value to the gaugemeter thickness.</p> |
