| 摘要 |
A system for controlling rolling mills, especially roll contour, has hydraulic motors supplied with working fluid through a pressure regulator. The downstream pressure of the working fluid from the pressure regulator is adjusted by selectively supplying and venting fluid from a loading chamber of the pressure regulator. The loading and unloading controls are of a nature that permits remote location, and they are operated by an attendant in accordance with signals from the mill indicating errors in the dimensions of metal being rolled by the mill. Automatic operation can be substituted for the manual operation and programmed control of the pressure can also be used. Loading and unloading valves have actuators providing dither for the valve to prevent the difference in flow rates when flow is increasing as compared to conditions when flow is decreasing.
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