US3724252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flattening mill
Assignee: Alcan Research and Development Ltd
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Filing: 1970-09-29
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Granted: 1973-04-03
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Expires: 1990-09-29
Abstract
Abstract A rolling mill for rectifying or avoiding undesirable shape in rolled products comprises flexible upper and lower work rolls, each work roll being backed either directly or through an intermediate roll by a single row of axially short backing rolls, each of which is carried in a carrier pivoted to a rigid member of the mill frame, the pivots of all the carriers associated with each work roll being aligned with one another, said mill including means for applying a substantially constant loading force to each of said carriers, the work rolls also being contacted by reaction rolls which contact the work rolls in such a manner that the reaction is substantially parallel with the plane of the strip pass between the work rolls to absorb the loads which arise in at least one direction parallel to the strip during rolling.
Inventors
- 👤 S Winterburn
- 👤 W Baker
- 👤 A Barker
- 👤 J Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:59
CPC Classifications
B; B21; B21B; B21B29/00; B21B1/00; B21B1/22; B21B13/00; B21B13/14; B21B13/145; B21D; B21D1/00; B21D1/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
219 words
A rolling mill comprising flexible upper and lower work rolls, each work roll being backed either directly or through an intermediate roll by a single row of axially short backing rolls, each of which is carried in a carrier pivoted to a rigid member of the mill frame, the pivots of all the carriers associated with each work roll being aligned with one another, said mill including means for applying a substantially constant loading force to each of said carriers, each said row having its short backing rolls on a common axis and being disposed, and being the only such row so disposed, to apply substantial backing pressure to the corresponding work roll along a line which is on the opposite surface of such work roll from the bite of the work rolls, said mill also including reaction roll means consisting of reaction rolls each disposed in contact with a side of a work roll at a line approximately midway between said backing roll pressure line and said work roll bite, said reaction rolls being in contact with the work rolls in such a manner that the reaction is substantially parallel with the plane of the strip pass between the work rolls to absorb the loads which arise in at least one direction parallel to the strip during rolling.
Claim 2
Dependent Claim
219 words
A rolling mill comprising flexible upper and lower work rolls, each work roll being backed either directly or through an intermediate roll by a single row of axially short backing rolls, each of which is carried in a carrier pivoted to a rigid member of the mill frame, the pivots of all the carriers associated with each work roll being aligned with one another, said mill including means for applying a substantially constant loading force to each of said carriers, each said row having its short backing rolls on a common axis and being disposed, and being the only such row so disposed, to apply substantial backing pressure to the corresponding work roll along a line which is on the opposite surface of such work roll from the bite of the work rolls, said mill also including reaction roll means consisting of reaction rolls each disposed in contact with a side of a work roll at a line approximately midway between said backing roll pressure line and said work roll bite, said reaction rolls being in contact with the work rolls in such a manner that the reaction is substantially parallel with the plane of the strip pass between the work rolls to absorb the loads which arise in at least one direction parallel to the strip during rolling.
Claim 3
Dependent Claim
39 words
A rolling mill as claimed in claim 1 wherein reaction rolls are provided on both sides of each work roll and the axes of the backing rolls lie on the plane passing through the axes of the work rolls.
Claim 4
Dependent Claim
116 words
A rolling mill as claimed in claim 1 wherein reaction roll means along a single axis is provided on one side of each work roll, the reaction on the other side of the work rolls being provided by the backing rolls which are so arranged that the line of application of pressure to the work rolls is offset from the plane passing through the axes of the work rolls, the amount of said offset for each work roll being such that the plane passing through said line and the bite of the work rolls makes a small angle with the plane passing through the axes of the work rolls, said angle being preferably less than 10*.
Claim 5
Dependent Claim
30 words
A rolling mill as claimed in claim 1 wherein means are provided for varying the loading forCe applied to at least the carriers near the ends of the work rolls.
Claim 6
Dependent Claim
24 words
A rolling mill as claimed in claim 4 wherein the means for applying a loading force to the carriers includes individual hydraulic load cells.
Claim 7
Dependent Claim
24 words
A rolling mill as claimed in claim 5 wherein the hydraulic load applied by at least some of said load cells is controllably variable.
Claim 8
Dependent Claim
88 words
A rolling mill as claimed in claim 6 wherein the hydraulic load cell associated with a carrier is controlled by a unit which includes a slave hydraulic load cell, to which it is connected in a closed system and a master hydraulic load cell connected to all other master load cells, each master load cell and slave load cell bearing against a lever having a movable fulcrum, whereby the pressure in the carrier load cell may be maintained at a desired proportion of the master load cell pressure.
Claim 9
Dependent Claim
34 words
A rolling mill as claimed in claim 2 wherein the reaction rolls on the side of the work rolls remote from the strip input are carried in slides and are stabilized by preloading rams.
Claim 10
Dependent Claim
24 words
A rolling mill as claimed in claim 1 wherein the means for applying a loading force to the carriers includes individual hydraulic load cells.
Claim 11
Dependent Claim
24 words
A rolling mill as claimed in claim 3 wherein the means for applying a loading force to the carriers includes individual hydraulic load cells.
References Cited (Backward Citations)
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US2677978A
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US2878778A
Cited
US2792730A
Cited
GB1134635A
Cited
US3478559A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |