| 摘要 |
<p>PURPOSE: To prevent a sheet from breaking by tracking a joined part between a preceding and a succeeding sheet and rolling so that the ear may be expanded in the sheet shape at each stand from the front to the rear as the joint part passes through each stand. CONSTITUTION: A preceding material A and a succeeding material B are joined by a joining device 4. The joined part is detected by a measuring roll 11, and the signal is inputted in an arithmetic and control unit 10 for setting through a pulse generator 12. The unit 10 receives, in each stand F1 -Fn of a finishing mill 3, a rolling load value from a rolling load detector 7, roll gap value from a roll gap control device 8 and roll bending force value from a roll bending control device 9. At immediately before the joined part reaches a stand F1 , the control device 10 outputs a signal to the roll bending control device 9, controlling the sheet shape of the joined part for ear-expanding. When the joined part passes through the stand F1 , a normal state is restored. Consequently, no breaking occurs on the sheet with a compressive stress actuated on the end part of the sheet.</p> |
