| 摘要 |
<p>PURPOSE:To accurately control both of sheet thickness and crown at the target values in a continuous mill. CONSTITUTION:A 4th stand deviation arithmetic part 12 is made so that the measured value of thickness of a steel sheet 1 on the outlet side of a 4th stand in addition to the target sheet thickness and crown are given from a thickness measurement equipment 9 and also the measured value of temp. of the steel sheet 1 on the outlet side of the 4th stand is given from a sheet temp. measurement equipment 10. In the 4th stand, thickness deviation DELTAh4 and sheet crown deviation DELTACR4 on the outlet side of the 4th stand are calculated based on the given data. On a downstream manipulation variable arithmetic part 13, the amount of correction of the pressure of roll bender and opening degree for rolling down that are manipulation variables at a 5th stand 5-a 7th stand 7 are determined based on calculated thickness deviation and sheet crown deviation. On the 5th stand 5- the 7th stand 7, the pressure of roll bender and opening degree for rolling down are respectively corrected based on the given manipulation variables.</p> |
