Device for vertically displacing a roll running on bearings in a roll stand

Abstract

In a device for vertically displacing a lower roll of a pair of rolls, running on bearings in a roll stand ( ), for adjusting the upper side of the lower roll to the rolling line, the rolls run on bearings in chocks and optionally can be supported by supporting rolls likewise running on bearings in chocks. Said device comprises actuators ( ) having supporting surfaces ( ) and having mating supporting surfaces ( ) arranged at different height levels in the direction of displacement, which selectively may be brought into and out of contact with the supporting surfaces ( ), which actuators ( ) are built in between the chocks of the lower roll and/or the chocks ( ) of the lower supporting roll and the roll stand ( ). For the purpose of achieving a considerable total height of adjustment and, at the same time, a height adjustment of the lower roll which is as fine as possible, each actuator ( ) comprises two bushes ( ) which are relatively twistable against each other around an axis (A) oriented in the direction of displacement and which can be brought into and out of contact in the direction of the axis (A), one bush ( ) having the supporting surfaces ( ) and the second bush ( ) having mating supporting surfaces ( ) designed diametrically opposed to the supporting surfaces ( ) (FIG. ).