US 5,029,400 AGranted

Device for setting the position of the cyclinders of a rolling mill

AssigneeClecim

InventorsYves Leclercq, Andre Ravenet

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Abstract

Device for setting of the position of the cylinders of a rolling mill whose gripping is regulated by hydraulic jacks. The device essentially comprises a tubular sleeve which surrounds a measuring rod, making no contact therewith, and moves in the same manner as the latter, being fixed to one of the elements of the hydraulic jack for gripping the cylinders of rolling mills, and sliding in an aperture pierced in the other element of the jack.

Claims6

Dependent claims

In a rolling mill comprising

(a) a housing having two vertical uprights respectively provided with guide windows;
(b) at least four rolls, respectively two working rolls and two backup rolls, said rolls being superposed along a vertical plane and each having ends supported by chocks mounted for sliding movement parallel to said vertical plane into said guide windows;
(c) adjusting means for gripping said rolls against each other, said adjusting means comprising for each upright a hydraulic gripping jack centered in said vertical plane and comprising two constituent members, mounted for sliding movement within one another and defining between them a chamber connected to means for supplying a fluid under pressure;
and
(d) a fixed member bearing on said housing and a movable member bearing on the corresponding chock of an upper back-up roll;
the improvement comprising
(e) a device for monitoring the position of said chock of said upper back-up roll, said device comprising:
(i) a position sensor fixed to the corresponding upright of said housing towards the outside of said housing;
(ii) a measuring rod arranged along the axis of said gripping jack, between an inner end fixed to the movable element of said jack and an outer end connected to said position sensor, said measuring rod passing into aligned apertures made respectively in said upright and in the fixed element of said jack and passing through said pressure chamber;
(iii) a tubular sleeve extending into said chamber between said fixed member and said movable member of said jack and having a length greater than the travel of said jack, said measuring rod passing with play into said sleeve;
(iv) said tubular sleeve having two ends respectively engaged in said aperture of said fixed member and in a bore provided in said movable member, said aperture and said bore having an inner cylindrical face;
(v) each engaged end of said sleeve being provided with a collar having a rounded lateral face bearing respectively on said inner face of said aperture and on said inner face of said bore, with the interposition of a sealing ring;
(vi) one end of said sleeve being connected to one member of said jack, the other end of said sleeve being mounted for sliding movement along said inner cylindrical face of the other member of said jack, over a length greater than the travel of said jack;
and
(vii) said two ends of said sleeve each providing an articulated and leaktight connection, respectively with said fixed and said movable members of said gripping jack for permitting disalignments.

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Dependencies are inferred from the claim text.

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Abstract

In a rolling mill comprising

(a) a housing having two vertical uprights respectively provided with guide windows;
(b) at least four rolls, respectively two working rolls and two backup rolls, said rolls being superposed along a vertical plane and each having ends supported by chocks mounted for sliding movement parallel to said vertical plane into said guide windows;
(c) adjusting means for gripping said rolls against each other, said adjusting means comprising for each upright a hydraulic gripping jack centered in said vertical plane and comprising two constituent members, mounted for sliding movement within one another and defining between them a chamber connected to means for supplying a fluid under pressure;
and
(d) a fixed member bearing on said housing and a movable member bearing on the corresponding chock of an upper back-up roll;
the improvement comprising
(e) a device for monitoring the position of said chock of said upper back-up roll, said device comprising:
(i) a position sensor fixed to the corresponding upright of said housing towards the outside of said housing;
(ii) a measuring rod arranged along the axis of said gripping jack, between an inner end fixed to the movable element of said jack and an outer end connected to said position sensor, said measuring rod passing into aligned apertures made respectively in said upright and in the fixed element of said jack and passing through said pressure chamber;
(iii) a tubular sleeve extending into said chamber between said fixed member and said movable member of said jack and having a length greater than the travel of said jack, said measuring rod passing with play into said sleeve;
(iv) said tubular sleeve having two ends respectively engaged in said aperture of said fixed member and in a bore provided in said movable member, said aperture and said bore having an inner cylindrical face;
(v) each engaged end of said sleeve being provided with a collar having a rounded lateral face bearing respectively on said inner face of said aperture and on said inner face of said bore, with the interposition of a sealing ring;
(vi) one end of said sleeve being connected to one member of said jack, the other end of said sleeve being mounted for sliding movement along said inner cylindrical face of the other member of said jack, over a length greater than the travel of said jack;
and
(vii) said two ends of said sleeve each providing an articulated and leaktight connection, respectively with said fixed and said movable members of said gripping jack for permitting disalignments.

12 more elements