Patent US3779054A successfully refreshed from Google Patents.
US3779054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coolant control for hot strip mill
Assignee: United Engineering Inc
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Filing: 1972-03-02
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Granted: 1973-12-18
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Expires: 1992-03-02
Abstract
Abstract The disclosure of the present invention relates to a strip temperature control method and apparatus for a finishing train of a hot strip rolling mill, including strip interstand coolant supply means, and a control for varying the rate of flow thereof, which includes a feed-forward control signal wherein the rate of flow is controlled in certain stands with reference to a computed temperature and a desired temperature of the strip as it leaves the train, and a feed-backward control signal wherein the rate of flow is controlled in one or more stands with reference to the actual temperature and a desired temperature as it leaves the train.
Inventors
- 👤 J Greenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:19
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/74; B21B45/00; B21B45/04; B21B45/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
259 words
A control system for a rolling mill adapted to reduce the thickness of a hot workpiece comprising: at least four tandemly arranged stands, first means arranged between a number of earlier stands of said mill for supplying coolant medium to said workpiece while it is being rolled, a second means arranged between a number of the latter stands of said mill for supplying coolant medium to said workpiece while it is being rolled, said first means comprising high pressure coolant means arranged between the first and next adjacent stand of said mill and a low pressure coolant means arranged between two succeeding stands and said second means comprising a low pressure coolant means, means for controlling the rate of flow of said coolant medium, said control means includes means for computing the temperature of the workpiece at a first point located after the last stand and producing a first signal representative thereof, means for comparing said first signal with a second signal representative of a desired temperature at said point after the last stand and for applying coolant medium from said first medium supply means to reduce any difference between the first and second signals to approximately a desired value, means for producing a third signal representative of the actual temperature of the workpiece at said point after said last stand, and means for comparing said third signal with a representation of said second signal and for applying coolant medium from said second supply means to reduce any difference between said second and third signals to a desired value.
Claim 2
Dependent Claim
259 words
A control system for a rolling mill adapted to reduce the thickness of a hot workpiece comprising: at least four tandemly arranged stands, first means arranged between a number of earlier stands of said mill for supplying coolant medium to said workpiece while it is being rolled, a second means arranged between a number of the latter stands of said mill for supplying coolant medium to said workpiece while it is being rolled, said first means comprising high pressure coolant means arranged between the first and next adjacent stand of said mill and a low pressure coolant means arranged between two succeeding stands and said second means comprising a low pressure coolant means, means for controlling the rate of flow of said coolant medium, said control means includes means for computing the temperature of the workpiece at a first point located after the last stand and producing a first signal representative thereof, means for comparing said first signal with a second signal representative of a desired temperature at said point after the last stand and for applying coolant medium from said first medium supply means to reduce any difference between the first and second signals to approximately a desired value, means for producing a third signal representative of the actual temperature of the workpiece at said point after said last stand, and means for comparing said third signal with a representation of said second signal and for applying coolant medium from said second supply means to reduce any difference between said second and third signals to a desired value.
Claim 3
Dependent Claim
249 words
A control system for a rolling mill adapted to reduce the thickness of a hot workpiece comprising: at least four tandemly arranged stands, first means arranged between a number of earlier stands of said mill for supplying coolant medium to said workpiece while it is being rolled, a second means arranged between at least three of the latter stands of said mill for supplying coolant medium to said workpiece while it is being rolled, means for controlling the rate of flow of said coolant medium including means for selectively operating said second coolant medium supply means progressively and cumulatively starting with said coolant supply means located between the last adjacent stands of said mill, said control means includes means for computing the temperature of the workpiece at a first point located after the last stand and producing a first signal representative thereof, means for comparing said first signal with a second signal representative of a desired temperature at said point after the last stand and for applying coolant medium from said first medium supply means to reduce any difference between the first and second signals to approximately a desired value, means for producing a third signal representative of the actual temperature of the workpiece at said point after said last stand, and means for comparing said third signal with a representation of said second signal and for applying coolant medium from said second supply means to reduce any difference between said second and third signals to a desired value.
Claim 4
Dependent Claim
249 words
A control system for a rolling mill adapted to reduce the thickness of a hot workpiece comprising: at least four tandemly arranged stands, first means arranged between a number of earlier stands of said mill for supplying coolant medium to said workpiece while it is being rolled, a second means arranged between at least three of the latter stands of said mill for supplying coolant medium to said workpiece while it is being rolled, means for controlling the rate of flow of said coolant medium including means for selectively operating said second coolant medium supply means progressively and cumulatively starting with said coolant supply means located between the last adjacent stands of said mill, said control means includes means for computing the temperature of the workpiece at a first point located after the last stand and producing a first signal representative thereof, means for comparing said first signal with a second signal representative of a desired temperature at said point after the last stand and for applying coolant medium from said first medium supply means to reduce any difference between the first and second signals to approximately a desired value, means for producing a third signal representative of the actual temperature of the workpiece at said point after said last stand, and means for comparing said third signal with a representation of said second signal and for applying coolant medium from said second supply means to reduce any difference between said second and third signals to a desired value.
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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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |