System of automated control of Hydraulic screw-down mechanisms of plate mill stand

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Abstract
When rolling with automated profile control is introduced at the plate mill, it imposes strict requirements to accuracy of automated gauge control. The structure of the Hydraulic Gap Control (HGC) position controller of the 5,000 mm mill is considered, it includes a fast proportional control channel and a relatively slow channel of integral position regulation. The paper provides dependencies for calculation of the controller factors. It views the principle of automated gauge control implemented in the resource of the Automatic Gap Control system of TCS stand controller. The paper offers a scheme of the gauge controller and dependencies for factor calculation. It specifies functions of the RAC regulator designed for compensation of the tensile difference (gap spacing) at the stand sides. There are results of experimental investigations of the gauge controller and RAC regulator provided. High accuracy of control of the set technological parameters and a full compensation of roller gap spacing are proved to be ensured at the settings proposed.