Rolling mill, and method for setting rolling mill
AssigneeNippon Steel Corporation
InventorsAtsushi Ishii, Daisuke Kasai, Daisuke Nikkuni
Life of this patent
Estimating the term…
Abstract
There is provided a rolling mill that includes a plurality of rolls, in which any one roll among respective rolls is adopted as a reference roll, including a load detection apparatus, detects a vertical roll load at a rolling support point position; a pressing apparatus pressing the roll chocks in the rolling direction; a driving apparatus moving the roll chocks in the rolling direction; and a position control unit which fixes a rolling direction position of roll chocks of the reference roll, and drives the driving apparatus to control positions in the rolling direction of the roll chocks of the rolls other than the reference roll.
Claims14
A rolling mill of four-high or more that includes a plurality of rolls including at least a pair of work rolls and a pair of backup rolls supporting the work rolls,
- in which any one roll among respective rolls arranged in a vertical direction is adopted as a reference roll,
- comprising:
- a load detector which, at a rolling support point position on a work side and a drive side of the backup rolls, detects a vertical roll load that acts in the vertical direction of the backup rolls;
- a pressing apparatus which, with respect to at least roll chocks of the rolls other than the reference roll, is provided on either one of an entrance side and an exit side in a rolling direction of a workpiece, the pressing apparatus pressing the roll chocks in the rolling direction;
- a driving apparatus, including a hydraulic cylinder, which, with respect to the roll chocks of the rolls other than the reference roll, is provided so as to face the pressing apparatus in the rolling direction, the driving apparatus moving the roll chocks in the rolling direction;
- a vertical roll load difference calculation portion which calculates a vertical roll load difference between the vertical roll load detected by the load detector on the work side and the vertical roll load detected by the load detector on the drive side;
- and
- a position controller which fixes a rolling direction position of the roll chocks of the reference roll as a reference position, and drives the driving apparatus to control positions in the rolling direction of the roll chocks of the rolls other than the reference roll so that the calculated vertical roll load difference becomes a value within an allowable range.
A method for setting a rolling mill,
- the rolling mill being a rolling mill of four-high or more that includes a plurality of rolls including at least a pair of work rolls and a pair of backup rolls supporting the work rolls, and a load detector which, at a rolling support point position on a work side and a drive side of the backup rolls, detects a vertical roll load that acts in a vertical direction of the rolls;
- the method for setting a rolling mill being executed before reduction position zero point adjustment or before starting rolling,
- in which any one roll among respective rolls arranged in the vertical direction is adopted as a reference roll,
- the method comprising:
- calculating a vertical roll load difference that is a difference between a vertical roll load detected by the load detector on the work side and a vertical roll load detected by the load detector on the drive side;
- and
- fixing a rolling direction position of roll chocks of the reference roll as a reference position and moving roll chocks of the rolls other than the reference roll in a rolling direction of a workpiece to adjust positions of the roll chocks so that the vertical roll load difference becomes a value within an allowable range.
Dependencies are inferred from the claim text.