| 摘要 |
PURPOSE:To perform coiling control effective for restraining telescoping by detecting bending roll reaction, pinch roll reaction and coiling tension, calculating coiling form evaluation index and adjusting rolling reduction of the bending roll. CONSTITUTION:An arithmetic unit 19 determines bending roll reaction F2 from plate width (b) and total reaction F2' of bending roll. An arithmetic unit 20 determines pinch roll reaction F3 from plate thickness (b) and total reaction F3' of pinch roll. An arithmetic unit 22 determines coiling tension T3 from plate width (b) and total coiling tension T3'. An arithmetic unit 23 determines tensile stress SIGMAt of rolled stock from plate thickness (t) and coiling tension F3. An arithmetic unit 24 determines index alpha from bending roll reaction F2, pinch roll reaction F3 and tensile stress SIGMAt of rolled stock. An arithmetic unit 25 outputs a bending roll operation signal S to a comparison arithmetic unit 26 from the index of the arithmetic unit 18 and said index alpha. When present draft position exceeds controlled position, the comparison arithmetic unit 26 sends a processed signal of the operation signal S to a rolling driving device 14 to control the bending roll 10. |
