US4955221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling mill for making a rolled product, especially rolled strip
Assignee: SMS Siemag AG
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Filing: 1988-11-02
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Granted: 1990-09-11
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Expires: 2008-11-02
Abstract
Abstract During operation of a rolling mill the roll gap and roll shape change, because of the influence of heat, bending of the working rolls or the roll mounting, wear and the like, and must be compensated and/or balanced to make a planar product, particularly a planar rolled sheet or strip. To compensate for these undesirable disadvantageous influences on the operation of the rolling mill frequent axial sliding of the rolls with respect to each other and/or positioning of the working rolls transverse to the plane of the rolled material is required. These undesirable influences are prevented in a particularly simple way and/or are compensated when the contours of the rolls in the initial state and/or unloaded state of the rolling mill are such that the sum of the roll body diameters at each relative axial position of the rolls varies axially from a constant value.
Inventors
- 👤 Hugo Feldmann
- 👤 Tilmann Schultes
- 👤 Gerd Beisemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:35
CPC Classifications
B; B21; B21B; B21B13/00; B21B13/14; B21B13/142; B21B13/147
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
128 words
A rolling mill for rolling flat stock comprising a plurality of rolls including a pair of working rolls defining a rolling gap between them, at least one of said rolls being axially shiftable relative to another of said rolls to control the shape of said gap and having a roll body which is continuously curved over an entire length thereof, all of said rolls having roll bodies rotatable about respective axes and said roll bodies having diameters in common planes perpendicular to said axes forming respective sums, the shapes of said roll bodies being such that said sums as determined axially along said roll bodies deviate from a constant value in all relative axial positions of said bodies in accordance with a nonlinear mathematical function different from zero.
Claim 2
Dependent Claim
128 words
A rolling mill for rolling flat stock comprising a plurality of rolls including a pair of working rolls defining a rolling gap between them, at least one of said rolls being axially shiftable relative to another of said rolls to control the shape of said gap and having a roll body which is continuously curved over an entire length thereof, all of said rolls having roll bodies rotatable about respective axes and said roll bodies having diameters in common planes perpendicular to said axes forming respective sums, the shapes of said roll bodies being such that said sums as determined axially along said roll bodies deviate from a constant value in all relative axial positions of said bodies in accordance with a nonlinear mathematical function different from zero.
Claim 3
Dependent Claim
36 words
The rolling mill defined in claim 1 wherein said mathematical function is symmetrical with respect to the centers of said bodies in which said one of said bodies is unshifted axially from a central position thereof.
Claim 4
Dependent Claim
23 words
The rolling mill defined in claim 2 wherein said mathematical function corresponds to a n th degree polynomial, where n is an integer.
Claim 5
Dependent Claim
15 words
The rolling mill defined in claim 2 wherein said mathematical function has an exponential function.
Claim 6
Dependent Claim
15 words
The rolling mill defined in claim 2 wherein said mathematical function is a harmonic function.
Claim 7
Dependent Claim
35 words
The rolling mill defined in claim 2 wherein said mathematical function is constituted of segments of different functions selected from n th degree polynomial functions where n is an integer, exponential functions and harmonic functions.
Claim 8
Dependent Claim
34 words
The rolling mill defined in claim 2 wherein said mathematical function is a sum of different functions selected from n th degree polynomial functions where n is an integer, exponential functions and harmonic functions.
Claim 9
Dependent Claim
35 words
The rolling mill defined in claim 2 wherein said mathematical function has a weighted means of different functions selected from n th degree polynomial functions where n is an integer, exponential functions and harmonic functions.
Claim 10
Dependent Claim
35 words
The rolling mill defined in claim 2 wherein said mathematical function has a linear combination of different functions selected from n th degree polynomial functions where N is an integer, exponential functions and harmonic functions.
Claim 11
Dependent Claim
17 words
The rolling mill defined in claim 1 wherein said one of said rolls is a bottle-shaped roll.
Claim 12
Dependent Claim
20 words
The rolling mill defined in claim 10 wherein said bottle-shaped roll is a backup roll braced against a working roll.
Claim 13
Dependent Claim
15 words
The rolling mill defined in claim 10 wherein said rolls form a two-high rolling mill.
Claim 14
Dependent Claim
15 words
The rolling mill defined in claim 10 wherein said rolls form a four-high rolling mill.
Claim 15
Dependent Claim
25 words
The rolling mill defined in claim 13 wherein two of said rolls are bottle-shaped rolls and are relatively displaceable axially in contact with one another.
Claim 16
Dependent Claim
27 words
The rolling mill defined in claim 10 wherein said rolls include a pair of rolls braced against another roll on at least one side of said gap.
Claim 17
Dependent Claim
25 words
The rolling mill defined in claim 15 wherein a single backup roll is braced against a working roll on the opposite side of said gap.
Claim 18
Dependent Claim
24 words
The rolling mill defined in claim 15 wherein a pair of rolls is braced against each working roll on each side of said gap.
Claim 19
Dependent Claim
36 words
The rolling mill defined in claim 15 wherein a pair of rolls is braced against a backup roll which is braced, in turn, against a working roll on at least said one side of said gap.
Claim 20
Dependent Claim
22 words
The rolling mill defined in claim 1 wherein one of said rolls is a backup roll for one of said working rolls.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |