Rolling mill with axially shiftable rolls and process for adjusting the profile of such rolls
AssigneeClecim
InventorJacques G. Giacomoni
Life of this patent
Estimating the term…
Abstract
A rolling mill with axially shiftable rolls, comprising, inside a supporting stand, at least two working rolls with bending jacks bearing in the direction of the bending force on a T-shaped sliding piece comprising a part forming a foot engaging into a housing machined in the block containing the bending jacks, to allow guidance in a translational movement in the vertical plane, and the chocks of the working rolls bearing on the pieces and thereby receiving the bending force can also shift on the pieces by sliding when the rolls are to be shifted axially.
Claims16
A rolling mill with axially shiftable rolls, said rolling mill comprising
- (a) a supporting stand having two uprights provided with apertures;
- (b) at least two working rolls which bear on at least two back-up rolls along a rolling plane;
- (c) chocks respectively carrying ends of each of said working rolls by means of rolling bearings;
- (d) said chocks being slidably mounted in said uprights of said supporting stand, parallel to said rolling plane, each chock having two bearing parts;
- (e) means for shifting at least one of said working rolls along its axis on either side of a centering position of said working rolls;
- (f) supporting blocks fixed on either side of said apertures of said uprights and having sliding faces for corresponding chocks of corresponding working rolls;
- (g) bending means for applying bending forces on said working rolls, said bending means comprising, for each chock, two symmetrical sets of at least two bending jacks respectively located in said supporting blocks;
- (h) sliding pieces each mounted for vertical sliding movement in a housing machined inside each said supporting block, each machined housing comprising two pairs of parallel guide faces, respectively a first pair of guide faces parallel to said rolling plane and a second pair of guide faces perpendicular to said rolling plane;
- (i) each sliding piece having a plane and smooth face parallel to the axis of the roll;
- (j) each chock being provided with bearing lugs extending on each side of the chock above said supporting blocks and bearing on said plane face with the possibility of sliding, said bending jacks applying the bending forces on said sliding piece on the side opposite to said plane face.
In a rolling mill with axially shiftable rolls, comprising, inside a supporting stand, at least two working rolls which bear on at least two back-up rolls along a rolling plane and having ends which are carried, by means of rolling bearings, in chocks adapted to be shifted in the supporting stand parallel to a rolling plane, at least one of said working rolls being associated, both with means for shifting said roll along an axis of said roll on either side of a centering position of said working rolls on a mid-plane of a rolled product, and with means for bending said roll, said bending means comprising, for each chock, two symmetrical sets of at least two bending jacks set axially apart from one another, the bending jacks of each chock being mounted on a fixed support integral with said supporting stand, said jacks being fed by means of a common hydraulic pressure, said jacks bearing in a direction of a bending force on T-shaped sliding pieces, a part of each of said sliding pieces forming a foot of a T being arranged so as to allow guidance in a translational movement in a vertical direction along a machined housing located in blocks containing said bending jacks,
- the improvement wherein said chocks of said working rolls each bear on a sliding piece, thereby receiving the bending force, said chocks shifting slidingly on said sliding pieces when said rolls are shifted axially, and wherein guidance of said sliding pieces in a vertical plane is effected by means which causes minimal loss resulting from friction in the vertical plane.
A rolling mill with axially movable rolls, said rolling mill comprising
- (a) a supporting stand having two uprights;
- (b) at least two working rolls bearing along a rolling plane on at least two back-up rolls;
- (c) chocks for supporting ends of said working rolls by means of bearings, each chock being slidably mounted in apertures in said uprights of said supporting stand parallel to said rolling plane, each bearing having a plane of symmetry;
- (d) means for shifting at least one of said working rolls along an axis of said working roll on either side of a centering position of said working roll;
- (e) supporting blocks fastened in said apertures of said uprights and having sliding faces for corresponding chocks of corresponding working rolls;
- (f) bending jacks located in said supporting blocks and bearing on sliding pieces for applying bending forces on bearing lugs provided on each side of said chocks and extending above said supporting blocks;
- (g) each bearing lug comprising a thrust insert arranged in the plane of symmetry of said chock;
- (h) each thrust insert bearing slidably on a plane and smooth face formed on said sliding piece on the side opposite to said bending jacks and parallel to the axis of said working rolls;
- (i) said sliding pieces transmitting bending forces applied by said jacks by shifting vertically and opposing a tilting torque arising from offset of said thrust insert in relation to the bending forces exerted by said jacks.
Process for adjusting the profile of axially shiftable rolls in a rolling mill comprising, inside a supporting stand, at least two working rolls which bear on at least two back-up rolls along a rolling plane and the ends of which are carried, by means of rolling bearings, in chocks mounted in the supporting stand so as to be movable parallel to a rolling plane, said process comprising the steps of
- (a) axially shifting at least one working roll in relation to a centering position in which said at least two working rolls are symmetrical relative to a mid-plane of said supporting stand, and
- (d) simultaneously bending the shifted roll by bringing to bear a bending force on said shifted roll ends, said bending force being exerted on each chock by means of two sets of at least two bending jacks set axially apart from one another, said bending force being exerted by means of fixed jacks bearing, on one side, on a supporting block fixed to said supporting stand and, on the other side, on an intermediate piece slidably guided on the supporting block in the direction of exertion of said bending force, so as to withstand tilting effects in the direction of axial shift of said rolls, said piece being provided, on the side of a corresponding chock, with a sliding surface on which the bearing part of said chock slides in the event of an axial shift of the corresponding roll.
Dependencies are inferred from the claim text.