Patent ID: 8276421

Claim:
A re-turning plant ( 11 ) for re-turning worn rollers ( 7 ) of rolling mills of a type comprising at least one roller stand ( 1 ) and a plurality of rollers ( 7 ) connected to the roller stand ( 1 ) by supporting organs movable in the plane of the roller stand ( 1 ), said rollers ( 7 ) being positioned within the roller stand ( 1 ) in a work position in which work surfaces ( 9 ) of the rollers ( 7 ) determine the outer profile of a body to be rolled, wherein the re-turning plant ( 11 ) comprises: a support structure ( 12 ) configured to support the roller-stand ( 1 ) in a turning position; a tool-holding device ( 13 ) that can be displaced relative to the support structure ( 12 ) such as to be capable of placing a tool ( 37 ) in contact with the work surfaces ( 9 ) of the rollers ( 7 ) while the rollers ( 7 ) are substantially in the work position and the roller stand ( 1 ) is in said turning position; at least one mandrel means ( 14 ) that can be coupled to at least one of the rollers ( 7 ) in order to rotate the roller ( 7 ) while the roller ( 7 ) is substantially in the work position and the roller stand ( 1 ) is in said turning position; a control unit ( 17 ) programmed to move the tool-holding device ( 13 ) relative to the rollers ( 7 ) to re-turn both the working surfaces ( 9 ) and lateral tabs ( 36 ) of the rollers ( 7 ), thereby reducing the nominal diameters of the rollers ( 7 ) and restoring the profile of the rollers ( 7 ) to that which existed before the rollers ( 7 ) became worn; and adjusting means configured to interact with said supporting organs for adjustably varying said work position of the rollers ( 7 ) in the roller stand ( 1 ) to compensate for the reduction in nominal diameter of the rollers ( 7 ) after re-turning.