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US 4,062,096 AGranted
Variable crown roll
AssigneeBlau-Knox Foundry & Mill Machinery, Inc.
InventorWerner W. Eibe
Life of this patent
Estimating the term…
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AssigneeBlau-Knox Foundry & Mill Machinery, Inc.
InventorWerner W. Eibe
Estimating the term…
The roll comprises an arbor having a sleeve fitted over its central portion, together with means for introducing hydraulic fluid under pressure between arbor and sleeve to expand the latter and vary its crown. In one embodiment the arbor is provided with a fixed shoulder at one end having an undercut bevel in its inner face and a movable collar on the other end, likewise provided with a shoulder having an undercut bevel on its inner face, and the sleeve has bevelled ends. The hydraulic means are adapted to urge the collar toward the first shoulder, wedging the ends of the sleeve against the arbor. In another embodiment, the arbor is tapered slightly at one end and the inner surface of the sleeve end is also tapered so that movement of the collar wedges the sleeve over the taper of the arbor. A filler is also provided to fill most of the space between arbor and sleeve and so reduce the amount of hydraulic fluid required to fill the roll. A third embodiment has a liner in the space between sleeve and arbor, attached to the sleeve at each end, and means for introducing the hydraulic fluid between sleeve and liner, so as to strengthen the grip of the sleeve on the mandrel as the roll crown is increased.
A variable crown roll for a rolling mill stand comprising an arbor having shoulders at each end, at least one shoulder being carried by a collar movable axially on the arbor, a sleeve surrounding the arbor between those shoulders so as to provide a working surface for the roll and being hollowed between its ends to form an elongated annular cavity between sleeve and arbor, means for supplying hydraulic fluid under pressure through the arbor to that cavity so as to expand the sleeve centrally and vary its crown, and hydraulic means connecting the arbor and the collar supplied with hydraulic fluid under pressure so as to urge the shoulders against the sleeve and clamp the ends of the sleeve against the arbor when hydraulic fluid is supplied to the cavity.
A variable crown roll for rolling mill stands comprising a cylindrical arbor, a sleeve surrounding the arbor intermediate the ends thereof so as to provide a working surface for the roll and being hollowed between its end to form an elongated annular cavity between sleeve and arbor, means for supplying hydraulic fluid under pressure through the arbor to that cavity, so as to expand the sleeve centrally and vary its crown, and a cylindrical filler positioned within the cavity so as to reduce substantially the volume thereof filled with hydraulic fluid.
A variable crown roll for rolling mill stands comprising a cylindrical arbor, a sleeve surrounding the arbor intermediate the ends thereof so as to provide a working surface for the roll, and being hollowed between its ends to form an elongated annular cavity between sleeve and arbor, a cylindrical liner positioned in that cavity and attached to the sleeve at each end so as to leave a clearance space between liner and sleeve, and means for supplying hydraulic fluid under pressure through arbor to the clearance space between sleeve and liner so as to expand the sleeve and liner away from each other, whereby as the crown of the roll is increased, the grip of the liner on the mandrel is strengthened.
Dependencies are inferred from the claim text.