Patent ID: 7849723
Filing Date: 2010-12-14
Classification: B21B

Abstract:
1. Rolling mill of the type operating with mandrel for rolling tubes, comprising an external structure extended along a rolling axis (L), a plurality of containers housed in the external structure and each one containing at least three rolls, actuating means for controlling the rotating rolls, means for regulating the distance of the rolls from the rolling axis (L), balancing systems for balancing the weight of the rolls and maintaining the position of the rolls between the rolling of one tube and another; wherein the rolls are mounted on respective yoke supports sliding along slides arranged in the containers so as to be movable inside the containers in a guided way along directions radial with respect to the rolling axis, in order to adjust the distance therefrom, wherein in that the rolls and the respective yoke supports are extractable radially from the containers through respective openings at the slides wherein said means for regulating the distance of the rolls from the rolling axis (L) comprise a single hydraulic capsule for each roll; wherein there is provided a single balancing system for each roll and wherein each balancing system is coaxial with the respective hydraulic capsule, said balancing system and said respective hydraulic capsule being operated along an axis tranverse to an axis of rotation of the respective roll.