A steel plant control device includes a subtractor, a PI controller, a first-order lag controller, and an adder. In a band that is lower than a first frequency f1, a gain of the PI controller is higher than a gain of the first-order lag controller; in a band from the first frequency f1 to a second frequency f2, the gain of the first-order lag controller is higher than the gain of the PI controller; and in a band that is higher than the second frequency f2, the gain of the PI controller is higher than the gain of the first-order lag controller.

An automatically adjusting auto gauge system comprises a servo motor that provides rotational motion; at least one of a gearbox and linear actuator driven by the one or more servo motors to transfer the rotational motor of the servo motor to linear motion; a group of roll former passes, each including a cam arm, an eccentric cam, a push rod, a top set of roll tooling, a bottom set of roll tooling; a bar operably coupled to the gearbox and the cam arms of the group of roll former passes, the bar driven by the gearbox to impart linear motion to the cam arms, which in turn imparts rotational motion to each eccentric cam, which in turn imparts linear motion, raising or lowering the top set of roll tooling via the push rod, adjusting a gap between the top and bottom sets of roll tooling.

An automatically adjusting auto gauge system comprises a servo motor that provides rotational motion; at least one of a gearbox and linear actuator driven by the one or more servo motors to transfer the rotational motor of the servo motor to linear motion; a group of roll former passes, each including a cam arm, an eccentric cam, a push rod, a top set of roll tooling, a bottom set of roll tooling; a bar operably coupled to the gearbox and the cam arms of the group of roll former passes, the bar driven by the gearbox to impart linear motion to the cam arms, which in turn imparts rotational motion to each eccentric cam, which in turn imparts linear motion, raising or lowering the top set of roll tooling via the push rod, adjusting a gap between the top and bottom sets of roll tooling.

A rolling device includes a roller, a heat exchange assembly, and an adjustment assembly. The roller is provided with a rolling surface configured to roll a target member. The heat exchange assembly is arranged opposite to the rolling surface. The heat exchange assembly is configured to adjust the temperature of the rolling surface. The adjustment assembly is connected to the heat exchange assembly and is configured to adjust the position of the heat exchange assembly in an axial direction of the roller, so as to adjust temperatures of different regions of the rolling surface of the roller in the axial direction. A rolling system includes the rolling device, a measurement device and a controller, the measurement device is configured to measure the thickness of the target member after rolling; and the controller is connected in communication with the measurement device and the adjustment assembly.

There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.

There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.

Control system for cold rolling mills to improve sheet metal thickness uniformity. Sensors monitor the state of the cold rolling mill by measuring (i) roll eccentricity, (ii) roll slips during mill operation, (iii) mill disturbances from roll speed or roll force manifestations, and (iv) unknown disturbances referred to as process noise. The controller analyzes data from sensors to compensate. Data collected during the mill operation by the sensors are delayed in reaching the controller. This communication delay is accounted for by using a filter. Since an objective of the controller software is dynamic identification of eccentricity of the back up rolls, which is non-linear by nature, an Extended Kalman Filter may be used.

Control system for cold rolling mills to improve sheet metal thickness uniformity. Sensors monitor the state of the cold rolling mill by measuring (i) roll eccentricity, (ii) roll slips during mill operation, (iii) mill disturbances from roll speed or roll force manifestations, and (iv) unknown disturbances referred to as process noise. The controller analyzes data from sensors to compensate. Data collected during the mill operation by the sensors are delayed in reaching the controller. This communication delay is accounted for by using a filter. Since an objective of the controller software is dynamic identification of eccentricity of the back up rolls, which is non-linear by nature, an Extended Kalman Filter may be used.

There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.

There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.