| 摘要 |
PURPOSE:To improve the rough surface resistance and to prolong the life-timing by injecting the cooling water on the surface of the rolling roll through a 1st roll cooling header and injecting the cooling water at the contact point of the rolling roll surface with a cutwater wiper by a 2nd header. CONSTITUTION:When a stock 11 to be rolled is bitten into the work rolls 2, 2', a load relay signal (j) is turned ON to output to a valve controller 9. The controller 9 makes its internal timer to start, after a time set previously is passed, automatic cut off valves 7, 7' are operated to open. Thereupon, the cooling water is injected toward the contact points A, A' of the surfaces of the rolling rolls 2, 2' with the cutwater wipers 4, 4'. A little clearance is generated between the contact points A, A' by the dynamic pressure, the cooling water leaks by this, the starting point of the cooling is moved on toward the roll bite side to improve the efficiency of roll cooling. |
