| 摘要 |
<p>PURPOSE:To set accurately a roll opening and to improve the accuracy of the sheet thickness of a product, by calculating the zero point of roll opening during rolling by using the actual results of the sheet thickness at the outlet side, roll opening, and rolling load. CONSTITUTION:When rolls are replaced at the (i)th stand, a rolling load calculating device 6 inputs the sheet thickness at the outlet side of the (i)th stand outputted from a draft schedule generating device 5 to calculate a rolling load. A draft position calculating device 9 calculates a draft position by using the rolling load obtained by the device 6. The draft position is given to a rolling-reduction driving device 4-2 to set a roll opening. On the other hand, a roll-opening zero-point calculating device 10 calculates the zero point of roll opening basing on respective actual results outputted from a sheet thickness detecting device moved previously along a rail 2 to the outlet side of the (i)th stand, a roll opening detecting device 7-2, and a rolling load detecting device 8-2.</p> |
