Patent US3603124A successfully refreshed from Google Patents.
US3603124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computer control system for rolling metal strips using feed-forward and prediction
Assignee: JFE Engineering Corp
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Filing: 1969-05-07
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Granted: 1971-09-07
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Expires: 1989-05-07
Abstract
Abstract A rolling method wherein the material size may be altered during a normal rolling operation by prediction and feed-forward control comprising predetermining a basic pattern for altering roll peripheral speed corresponding to a fixed pattern of roll opening (or strip gauge), computing the actual amount of alteration of the above speed based on at least a command for gauge alteration and feeding forward the computed value corresponding to roll peripheral speed alteration to each stand.
Inventors
- 👤 Tohru Arimura
- 👤 Masamoto Kamata
- 👤 Morio Saito
- 👤 Terumi Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:14
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/16; B21B37/24; B21B37/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
135 words
In a multistand rolling apparatus for rolling a metal strip between pairs of rolls, a method of maintaining the interstand tension constant by predicting and automatically controlling the amount of gauge alteration at each stand during a rolling operation, comprising: predetermining a basic pattern for altering roll peripheral speed at each stand corresponding to a fixed pattern of metal strip gauge alteration; detecting a change in the roll opening; computing values corresponding to a required amount of alteration of roll peripheral speed at a plurality of said stands as a function of said detected change in roll opening and as a function of said predetermined basic pattern; and feeding forward said computed values to a plurality of said stands to control the roll peripheral speeds at said stands to thereby maintain the interstand tension constant.
Claim 2
Dependent Claim
135 words
In a multistand rolling apparatus for rolling a metal strip between pairs of rolls, a method of maintaining the interstand tension constant by predicting and automatically controlling the amount of gauge alteration at each stand during a rolling operation, comprising: predetermining a basic pattern for altering roll peripheral speed at each stand corresponding to a fixed pattern of metal strip gauge alteration; detecting a change in the roll opening; computing values corresponding to a required amount of alteration of roll peripheral speed at a plurality of said stands as a function of said detected change in roll opening and as a function of said predetermined basic pattern; and feeding forward said computed values to a plurality of said stands to control the roll peripheral speeds at said stands to thereby maintain the interstand tension constant.
Claim 3
Dependent Claim
20 words
A method as set forth in claim 1 wherein said change in roll opening is detected by a fixed program.
Claim 4
Dependent Claim
26 words
A method as set forth in claim 1 wherein said change in the roll opening is detected by measuring interstand tension with an interstand tension meter.
Claim 5
Dependent Claim
35 words
A method as set forth in claim 1 wherein said change in roll opening is detected by measuring the thickness of the strip with a thickness meter at the delivery side of a rolling stand.
Claim 6
Dependent Claim
29 words
A method as set forth in claim 1 wherein said change in roll opening is detected by measuring the rolling force at a stand with a rolling force meter.
Claim 7
Dependent Claim
34 words
A method as set forth in claim 1 wherein said change in roll opening is detected by the combination of a predetermined fixed program, measuring interstand tension, and measuring rolling force at a stand.
Claim 8
Dependent Claim
41 words
A method as set forth in claim 1 wherein said change in roll opening is detected by the combination of a predetermined fixed program, measuring interstand tension, and measuring the thickness of the strip at the delivery side of a stand.
References Cited (Backward Citations)
US3036480A
Cited
US3169421A
Cited
US3186201A
Cited
US3174317A
Cited
US3212310A
Cited
US3332263A
Cited
US3457747A
Cited
US3508425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |