Patent ID: 8640516

Claim:
A rolling mill for rolling rod-shaped bodies extending along a rolling axis, comprising a plurality of rolling mill stands arranged in sequence and tilted by an angle with respect to the previous mill stand in a plane orthogonal to the rolling axis, each rolling mill stand comprising a fixed external structure, first, second and third working rolls arranged in a roll-holder cartridge and spaced about 120 degrees apart in a plane orthogonal to the rolling axis, said roll-holder cartridge being movable along a lateral path from a working position inside the fixed structure, at said rolling axis, to a side extraction position outside the fixed structure for changing the working rolls, the lateral path extending in a plane orthogonal to the rolling axis, first, second and third hydraulic capsules each having a movable piston that is releasably connected to the first, second and third working rolls, respectively, when the cartridge is in the working position to adjust the radial position of the respective first, second and third rolls relative to the rolling axis, the piston of the first hydraulic capsule moving along a horizontal path that is parallel to the lateral path and that extends between the second and third pistons, the pistons of the second and third hydraulic capsules retracting a distance sufficient to allow the roll holder cartridge to move between the working and extracted positions when the second and third pistons are retracted; wherein each of the first, second and third hydraulic capsules are firmly fixed to the fixed structure, and wherein the roll-holder cartridge is configured to fit between the second and third pistons when the second and third pistons are in the retracted position, so the roll-holder cartridge can move between the working and extracted positions.