| 摘要 |
PURPOSE:To properly prevent shape inferiority or drawing, by using a high b.p. heating medium recirculating through a closed pipeline as a cooling medium allowed to flow through a cooling roll and selecting the operation temp. of the cooling medium corresponding to a plate passing condition. CONSTITUTION:The operation temp. of a cooling medium for stably passing a plate under a plate passing condition is inputted to a process control computer 9 as a preset value 10. The temp. of the cooling medium in the entry side of a cooling roll 1 is measured by a temp. detecting end 11 while the temp. of a strip in the exit side of a roll cooling part is measured by a radiation thermometer 12 and both measured values are inputted to the process computer 9. A signal for adjusting the opening degrees of the control valve 6 of a cooler bypass flow amount and the cooling fluid flow control valve 8 of a cooler is outputted to the control valves 6, 8 and a roll raising and falling apparatus 13 on the basis of the temp. of the cooling medium and the set operation temp. from the process computer 9 while a control signal for raising and falling the cooling roll is outputted to said valves 6, 8 and said apparatus 13 from said computer 9 on the basis of the detected temp. of the strip in order to control a strip winding length to the cooling roll 1. |
