| 摘要 |
PURPOSE:To improve yield as well as the quality of a steel material by detecting successively the surface temp. of the material to be cooled and by controlling the spraying quantity, spraying time of the cooling water and the number of a transfer roller revolutions based thereon. CONSTITUTION:The surface temp. detecting device 15, 16, 17, 20, 21, 22 measuring the surface temp. of the material 5 to be cooled are incorporated inside a cooling device 2 and these detecting signals are continuously fed back in order to a control device 13. The flow quantity is then adjusted with control valves 7, 8 so as to correct the deviation between the cooling water quantity and the target value by the command placed from the control device 13. The number of revolutions of the transfer roller 9 is also controlled automatically for the change of the cooling time. Due to the cooling speed and cooling stopping temp. of extremely high accuracy being obtainable with said method the quality of a steel material is improved and the yield is improved as well. |
