| 摘要 |
PURPOSE:To cast steel continuously and stably without slipping, over-pushing, etc. by controlling the torque of motors for respectively plural pieces of driving rolls for pushing and reference driving rolls with a command controller in accordance with the signals for the decrease in pushing force. CONSTITUTION:When the signal indicating the generation of a slip in any of the driving rolls 4' for pushing of, for example, No.1 block of forcing rolls 4 is fed from a device 14 for detecting slips to a device 16 for generating the signal for decrease in pushing force, the prescribed rate of the decrease in pushing force is operated with the device 16. Such a signal for the decrease in pushing force which regulates the pushing force by the rolls 2 to the operated pushing force is fed to a command controller 13, then the rolls 4' are controlled to the prescribed torque by the device 13 and the slip between the rolls 4' and an ingot 2 is eliminated. When a slip is generated in the reference driving roll 6' of speed reference rolls 6, the rolls 4' of the No.1 and No.2 blocks are controlled of torque. Even when the signal from a device 15 for detecting unstability is fed to the device 16, the rolls 4' are controlled of torque in the same way as mentioned above. |
