| 摘要 |
<p>PURPOSE:To eliminate the phase lag of hydraulic rolling down, by providing a device used for obtaining the eccentricity frequency of back up rolls by counting phase signals for a fixed time and a function generator outputting the phase signals in accordance with said frequency to calculate the quantity of roll eccentricity earlier by the number of pulses equivalent to that of said phase signals. CONSTITUTION:Pulse signals (i), detected by pulse generators 3 attached to the shaft ends of back up rolls 2, are transmitted to a Fourier series expanding device 4 and to a device 5 used for determining the predicting angle of phase lag, and at the same time, signals detected by a load cell 6 are transmitted to said device 4. Further, the signals are respectively outputted from the device 5 to the device 4, and from the device 4 to a servovalve 8 used for controlling the quantity and pressure of a hydraulic oil fed to a hydraulic rolling down device 7. Thus, the phase lag of hydraulic rolling down can be eliminated by constituting the controlling system as mentioned above.</p> |
