Rolling mill stand and related rolling mill for longitudinally rolling rod-shaped bodies
AssigneeDanieli & C. Officine Meccaniche SpA
InventorsCernuschi Ettore, Fabrizio Marini, Aristide Giacomo Bertelli
Life of this patent
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Abstract
A rolling mill stand and related rolling mill for rolling rod-shaped bodies, even large in size, which meets the requirement of stiffness uniformity of the rolling mill stands in the transversal direction, all the hydraulic capsules being firmly fixed to the external structure of the rolling mill and providing for the side change of the rolls of each stand. The arrangement of rolling rolls and related extensions of each rolling mill stand is such to avoid problems of corrosion and damaging to the extensions themselves and to the reducers due to the drainage of the cooling waters.
Claims9
A rolling mill stand, defining a rolling axis, comprising
- a fixed external structure,
- three working rolls arranged in a roll-holder cartridge, said cartridge being movable 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,
- wherein there is provided for each working roll at least one respective hydraulic capsule firmly fixed to the fixed structure,
- wherein at least a first hydraulic capsule is of the double-stroke type, thus providing, in addition to a first working stroke for adjusting the radial position of the respective working roll, a second clearance stroke from the rolling axis, to facilitate the side extraction of said roll-holder cartridge,
- wherein a second hydraulic capsule is horizontally arranged to allow said roll-holder cartridge to be extracted along a horizontal plane.
A rolling mill stand according to any one of the claims from 2 to 7, wherein said first hydraulic capsules are of the movable top type and comprise a movable piston acting on the seal-holder yoke of the roll, a hollow piston in which the movable piston slides and a fixed external cylinder.
Dependencies are inferred from the claim text.