Patent ID: 6170312
Filing Date: 2001-01-09
Classification: B21B

Abstract:
A roll mill comprising a supporting stand with two separate roll standards, at least two superimposed rolls delineating an air-gap for the passage of a product to be rolled along a rolling plane, and having each two ends each rotating inside a supporting block mounted to slide, parallel to a clamping plane passing through the axes of the rolls, between two guiding faces provided on two sides of a window of each roll standard, means for clamping the rolls and acting on at least one roll with adjustable level, comprising two clamping jacks mounted respectively on both standards of the stand and each comprising two elements mounted to slide one into the other and delineating a pressure chamber connected to pressurised fluid supply means, respectively, a mobile back-up element on the supporting block of the corresponding end of the adjustable roll and a fixed element resting on the roll standard of the stand, and means for measuring the position of the adjustable roll comprising, at each end of the roll, a measuring rod having an internal end connected to the mobile element of the clamping jack and extending successively through the pressure chamber, the fixed element of the jack and the roll standard of the stand, up to an opposite end located outside the standard, whereas the said rod goes through a tubular sleeve with a certain clearance that extends into the pressure chamber of the jack in order to preserve the tightness thereof, whereas the said sleeve has an internal end axially integral with the axis of the mobile element of the jack and exhibits an insulating section mounted to slide axially with respect to the fixed element, wherein the tubular sleeve connected to each jack is extended to the outside, beyond the sliding insulating section, by an oblong linking member extending along the measuring rod without any contact with the said rod and going through the roll standard of the stand up to an end located outside the stand and on which is fixed a back-up section of restoring means of the mobile element of the jack toward the fixed element, whereas the said restoring means act onto the mobile element via the linking member and the tubular sleeve, in the direction opposite the clamping direction, while resting on the roll standard of the stand.