| 摘要 |
PROBLEM TO BE SOLVED: To control variation of tension without reducing the yield, even if a change amount of a board thickness is large.SOLUTION: A control device 2 includes the steps of: calculating a roll circumferential speed of each stand depending on a board thickness changing point Pt; calculating a friction coefficient between the rolling roll of each stand and the metal band St depending on the position of the board thickness changing point Pt by using the roll circumferential speed of each stand; calculating the roll gap of each stand depending on the position of the board thickness changing point Pt by using the calculated friction coefficient; and controlling the roll circumferential speed of each stand and the roll gap depending on the position of the board thickness changing point Pt according to the calculated roll circumferential speed and the roll gap. Namely, in the in-running board thickness change processing in one embodiment of the present invention, the control device 2 calculates a setting value of the roll gap of each stand in all roll circumferential speed changing points. |
