THREE-ROLLS STAND OF LONGITUDINAL ROLLING MILLS AND METHOD OF RELOADING ROLLS OF THREE-ROLLS STAND OF LONGITUDINAL ROLLING MILLS

摘要

FIELD: technological processes.;SUBSTANCE: invention relates to the field of rolling production, and more specifically to the design of three-roll stands of longitudinal rolling mills for the production of seamless pipes and long products of round section. Stand contains a detachable frame, one part of which is made in the form of a base formed by three connected at an angle of 120° buildings, each of which is located on the axis of the rotary lever with the roll assembly, the mechanisms for installing and balancing the roll assemblies. Increasing the rigidity of the stand and reducing downtime when replacing a worn tool is ensured by the fact that the axes of the swivel arms and the mechanisms for installing the roll assemblies are mounted together at the base of the detachable bed, and the second part of the bed is made in the form of a detachable cover that has a cylindrical connector. When reloading the rolls, the removable bed cover is dismantled, the stand is placed horizontally, after moving each roll assembly fixed on the pivot arm located in the bed, in the area of free access to it by rotating the pivot arm on the axis in the plane of the axis of rolling, fix it in a vertical position, perpendicular to the plane of the connector of the stand of the stand, the roll unit from the fastening elements with the pivoting lever is released, the roll unit is removed with vertical and a new one is installed.;EFFECT: increased stand stiffness and reduced downtime when replacing a worn tool.;4 cl, 6 dwg