US 12,076,769 B2
Flatness roller, system for measuring flatness and line for associated rolling operations
Sylvain Magne, Chatillon (FR); and Nicolas Legrand, Chicago, IL (US)
Assigned to COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR); and ArcelorMittal, Luxembourg (LU)
Appl. No. 16/971,597
Filed by COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR); and ArcelorMittal, Luxembourg (LU)
PCT Filed Feb. 19, 2019, PCT No. PCT/FR2019/050368
§ 371(c)(1), (2) Date Aug. 20, 2020,
PCT Pub. No. WO2019/162606, PCT Pub. Date Aug. 29, 2019.
Claims priority of application No. 18 51553 (FR), filed on Feb. 22, 2018.
Prior Publication US 2021/0078060 A1, Mar. 18, 2021
Int. Cl. B21B 38/02 (2006.01); B21B 1/24 (2006.01); G01B 11/26 (2006.01); G01B 11/30 (2006.01); G01L 1/24 (2006.01)
CPC B21B 38/02 (2013.01) [B21B 1/24 (2013.01); G01B 11/26 (2013.01); G01B 11/306 (2013.01); G01L 1/246 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A flatness roller comprising:
a body of cylindrical shape extending along an axis of revolution and radially delimited by an outer surface,
wherein the body includes at least one cavity extending parallel to the axis of revolution,
each cavity opening radially onto the outer surface through a plurality of slots each extending in a respective plane orthogonal to the axis of revolution,
each slot having two circumferential slot ends,
two successive slots among the plurality of slots and along an axis parallel to the axis of revolution define a lamella therebetween, each lamella being delimited by the circumferential slot ends of the two successive slots,
each lamella being connected to the body by two opposite circumferential ends of each lamella, each circumferential end of each lamella forming a connection portion,
the body having one or more generatrix, each generatrix being formed by lamellas aligned in a direction parallel to the axis of revolution,
the flatness roller further including at least one optical fibre comprising at least one strain sensor, each strain sensor having a measurement axis, each strain sensor being associated with one of the lamellas,
each strain sensor being housed in a corresponding cavity of the least one cavity and attached to the associated lamella at one of the connection portions of each lamella,
each strain sensor being arranged so that an angle between a corresponding one of the measurement axes and a plane orthogonal to the axis of revolution is less than or equal to 20°, and
each optical fibre being configured to receive an interrogation signal, each strain sensor of each optical fibre being configured to send, depending on the interrogation signal received by each optical fibre, an optical response wave representative of a strain of the strain sensor along the corresponding measurement axis.