Patent ID: 6094959
Filing Date: 2000-08-01
Classification: B21B

Abstract:
A rolling stand, comprising:a stationary housing;a pair of working rolls, each working roll being supported at each end by a chock, the chock being operably connected to a movable block, the movable block being movably connected to the stationary housing by a displacement device for inducing a crossover displacement of the working rolls; andat least one compressor unit provided in a seating of each movable block for generating a compression thrust along an axis not contained within a plane along which the crossover displacement of the respective working roll is induced, the compression unit comprising an oscillating plunger body housed inside a stationary housing seating made in a piston element, the plunger body being conformed as a double element spherical cap having first and second spherical cap elements, the first spherical cap element facing towards the piston element, being entirely contained inside a containing seating cradle and cooperating rotatably with an inner spherical surface of said containing seating cradle, the inner spherical surface having a shape corresponding to a shape of the first spherical cap element, the second spherical cap element being partly outside the containing cradle and facing towards the translatable surface and partly cooperating with an at least partly spherical surface of a movable element solid with the said translatable surface, the at least partly spherical surface having a shape corresponding to a shape of the second spherical cap element, the compression unit being characterised in that between the first and the second spherical cap elements there is placed an annular cylindrical connection and centering element comprising a ring made of an at least partly deformable elastic material, the elastic ring having a force of elastic reaction greater than the tangential component (F.sub.t) of the thrust force generated by the translatable surface against the plunger body, when the said surface is in a laterally translated position, in order to allow the restoration of an axially centered position of the plunger body.