Patent ID: 6244090
Filing Date: 2001-06-12
Classification: B21B

Abstract:
A roll mill comprising:a retaining stand with two distant stanchions, each stanchion comprising a window with two sides,a set of rolls comprising at least two working rolls with two parallel axes of rotation placed in a substantially vertical clamping plane, said working rolls delineating a space for passing a product along a substantially horizontal rolling plane,each of said at least two working rolls having two ends rotating respectively in two chocks, each chock including a bearing having a medium plane perpendicular to an axis of rotation of the roll, said two chocks being mounted respectively, in said windows of the stanchions of the stand, and each chock having, on either side of the clamping plane, lateral retaining faces sliding along fixed guiding faces parallel to the clamping plane,each chock being provided, on each side, with a lug protruding to the outside with respect to the corresponding lateral retaining face of the chock, each lug having an internal bearing face directed toward the rolling plane and an external bearing face directed toward the opposite side,means for applying bending loads to each end of both said at least two working rolls comprising, on either side of the clamping plane, two sets of bending jacks, each set being provided on a side of the rolling plane, each set including at least two positive bending jacks bearing, respectively, on internal faces of the lugs of both chocks and a set of at least two negative bending jacks bearing, respectively, on external faces of the lugs of both chocks, each bending jack having one fixed element and one mobile element,said bending jacks of both chocks being centered respectively in two planes parallel to the clamping plane,each lug of each chock having a staggered profile comprising at least one bearing part and at least one free space,wherein, on at least one side of the clamping plane, one lug of one of said two chocks placed on one side of the rolling plane is provided with one single bearing part which is centered on the medium plane of the bearing of said one chock and two free spaces on either side of said single bearing part, and the facing lug of the other of said two chocks placed on the other side of the rolling plane is provided with one single free space which is centered on the medium plane of the bearing of said other chock and two bearing parts on either side of said single free space,said one chock being associated with one positive bending jack and one negative bending jack bearing respectively on internal and external faces of the single bearing part of the one lug, the mobile element of said one positive bending jack crossing the rolling plane and passing through the single free space of the facing lug of said other chock, and said other chock being associated with two positive bending jacks and two negative bending jacks bearing respectively on the internal and external faces of the two bearing parts of the facing lug, the mobile elements of said two positive bending jacks passing in the two free spaces of the one lug of said one chock.