US3709009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for detecting eccentricity and phase angle of working or backing roll in rolling mill
Assignee: IHI Corp
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Filing: 1970-10-22
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Granted: 1973-01-09
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Expires: 1990-10-22
Abstract
Abstract A method for detecting an eccentricity and phase angle (an angle formed between a predetermined point of a roll and a point at which the maximum eccentricity occurs) of a working or backing roll in a rolling mill without use of detectors directly attached to the peripheral surface of the roll is provided. The rolling pressure is sampled, quantized and fed into an arithmetic unit for calculating the eccentricity and phase angle of the roll based upon the following relations:
Inventors
- 👤 H Shiozaki
- 👤 N Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:23
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21B; B21B37/00; B21B37/58; B21B37/66
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
A process for detecting the eccentricity and phase of a roll in a rolling mill comprising measuring the rolling pressure and rotational speed, sampling the measured rolling pressure at a suitable time interval quantizing the sampled rolling pressure, calculating the eccentricity and phase of the roll by feeding the quantized rolling pressure into an arithmetic unit, holding the calculated eccentricity and phase in a holding circuit, converting the eccentricity and/or phase angle of the roll into analog quantities, and using said analog quantities as the signals for correcting the variation in thickness of the rolled sheet due to the eccentricity of the roll.
Claim 2
Dependent Claim
103 words
A process for detecting the eccentricity and phase of a roll in a rolling mill comprising measuring the rolling pressure and rotational speed, sampling the measured rolling pressure at a suitable time interval quantizing the sampled rolling pressure, calculating the eccentricity and phase of the roll by feeding the quantized rolling pressure into an arithmetic unit, holding the calculated eccentricity and phase in a holding circuit, converting the eccentricity and/or phase angle of the roll into analog quantities, and using said analog quantities as the signals for correcting the variation in thickness of the rolled sheet due to the eccentricity of the roll.
Claim 3
Independent Claim
103 words
A system for determining the eccentricity and phase of a roll in a rolling mill comprising means providing a first signal corresponding to the rolling pressure of said roll, means providing a second signal corresponding to the angular velocity of said roll, an arithmetic unit, and means applying said first and second signals to said arithmetic unit, said arithmetic unit comprising means for producing output signals A and Beta corresponding to said eccentricity and phase respectively from the relationship: where Delta P is the variation in rolling pressure of said roll, K is a mill constant, and M is the plastic deformation coefficient.
Claim 4
Independent Claim
103 words
A system for determining the eccentricity and phase of a roll in a rolling mill comprising means providing a first signal corresponding to the rolling pressure of said roll, means providing a second signal corresponding to the angular velocity of said roll, an arithmetic unit, and means applying said first and second signals to said arithmetic unit, said arithmetic unit comprising means for producing output signals A and Beta corresponding to said eccentricity and phase respectively from the relationship: where Delta P is the variation in rolling pressure of said roll, K is a mill constant, and M is the plastic deformation coefficient.
Claim 5
Dependent Claim
48 words
The system of claim 2 wherein said means for providing said first signal comprises means for sampling the rolling pressure of said roll at a rate T/n to provide said first signal, where T is the time of one rotation of the roll and n is an integer.
Claim 6
Dependent Claim
47 words
The system of claim 3 further comprising storage means, and means for applying said first signal to said arithmetic unit directly and by way of said storage means, and wherein said arithmetic unit comprises means for producing said output signals A and Beta according to the relationship:
References Cited (Backward Citations)
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US3194035A
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US3478551A
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US3543549A
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US3580022A
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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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |