| 摘要 |
<p>PURPOSE:To prevent the plate camber of a stock to be rolled by computing the temp. difference between the upper and lower surfaces of the stock to be rolled on the inlet side of the hot rolling mill and reducing the roll speed of the hot rolling side, corresponding to the estimated plate camber quantity based on said computed value. CONSTITUTION:The temp.s of the upper and lower surfaces of the stock to be rolled before being bitten into the mill are detected by thermometers 7, 8 disposed on the upper and lower positions just before the mill, the temp. difference between the upper and lower surfaces is computed by a subtracter 9. Based on this temp. difference, alphathe peripheral speed ratio of the upper and lower rolls required to absorb the place camber value generated by the temp. difference between the upper and lower surfaces' and to prevent the plate camber is computed by an arithmetic unit 10 through a relational equation. Based on the peripheral speed difference computed from this peripheral speed ratio, the speed of the roll driving motors 5 or 6 positioned on the high temp. side of the upper and lower surfaces of the stock is reduced. By this method, the plate camber of the sock 1 is precisely and stably prevented.</p> |
