| 摘要 |
PURPOSE:To obtain a long-sized thin strip having a good shape by measuring the spacing between a nozzle and roll, moving the index of a nozzle position control system by the signal and moving further the index of the nozzle position control system according to the extent of movement of the index thereby maintaining the specified spacing. CONSTITUTION:The spacing between the roll 3 and the nozzle 2 is measured by an optical system consisting of a light projector 7 and a photodetector 8. The measured signal is supplied via an amplifier 10-1 to a control part 11. The extent of the movement of a hydraulic cylinder 6 is measured by a magnetic scale 9, etc. and the measured signal is supplied via an amplifier 10-2 to the part 11. The extend at which the cylinder 6 is ought to be moved is determined in the part 11 and the signal thereof is supplied via an amplifier 10-3 to the cylinder 6 which moves in turn a melting furnace thereby controlling the spacing between the roll 3 and the nozzle 2. |
