| 摘要 |
PURPOSE:To enable the changing of the thickness of rolled materials in a continuous rolling mill without degrading quality or yield in the stage of changing the thickness in the mid-way by shifting the change of the plate successively to the rolling schedules on the upper stream sides in the stage of changing the thickness without changing the rolling schedules on the lower stream side prior to changing of thickness under travelling. CONSTITUTION:In the case of rolling steel plates, etc. with continuous rolling mills provided with plural rolling mills and changing the thickness in the mid-way of rolling, the rolling reduction of one rolling mill is changed to the rolling reduction for the purpose of changing the thickness when the point of the rolled material where the thickness is to be changed is gnawed in said rolling mill. At the same time, the rolling speeds of all the rolling mills on the upper stream side including said rolling mill are changed and the tension from the rolling mills on the upper stream sides is so changed as to attain predetermined tension without changing the rolling speeds of the down stream side and the tension between said rolling mill and the rolling mill on the down stream side. When the point where the thickness is to be changed arrives at the final rolling mill, the rolling reduction of said rolling mill is changed to the intended reduction and the rolling speed of the entire rolling mill is changed to the intended change value in accordance with the schedules after the change of the thickness and the material, whereby rolling is performed. |
