US 11,986,872 B2
Method of controlling a roll gap in a rolling mill
Stuart Leflay, Sothall Sheffield (GB); Rhodri Evans, Sheffield (GB); and Philip Lawlor, Dorset (GB)
Assigned to PRIMETALS TECHNOLOGIES, LIMITED, (GB)
Appl. No. 17/773,714
Filed by PRIMETALS TECHNOLOGIES, LIMITED, London (GB)
PCT Filed Sep. 9, 2020, PCT No. PCT/EP2020/075190
§ 371(c)(1), (2) Date May 2, 2022,
PCT Pub. No. WO2021/089219, PCT Pub. Date May 14, 2021.
Claims priority of application No. 19207929 (EP), filed on Nov. 8, 2019.
Prior Publication US 2022/0379360 A1, Dec. 1, 2022
Int. Cl. B21B 38/10 (2006.01)
CPC B21B 38/105 (2013.01) [B21B 2267/18 (2013.01); B21B 2271/02 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of controlling a roll gap between first and second work rolls of a rolling mill, wherein work surfaces of the first and second work rolls are arranged in opposing relationship and respective longitudinal axes of the rolls are lying in a common plane;
in use the work surfaces are spaced apart so as to form a gap for receiving a metallic product for rolling,
the method comprising:
defining a plurality of work surface locations spaced apart along the first work roll in the longitudinal direction;
obtaining, with a plurality of sensors arranged along a row, a radius of the work surface of the first work roll at each of the work surface locations by activating the sensors repeatedly while rotating the first work roll;
based on the radii of the work surface locations, obtaining a longitudinal profile of the work surface;
based on the longitudinal profile, tilting the first work roll relative to the second work roll in the common plane in order to reduce a difference in the average size of the gap at either side of a centerline which bisects the longitudinal axes of the first and second work rolls.