US3881335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll eccentricity correction system and method
Assignee: AEG Westinghouse Industrial Automation Corp
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Filing: 1974-03-07
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Granted: 1975-05-06
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Expires: 1994-03-07
Abstract
Abstract A control system and method are disclosed to operate with at least one roll stand of a rolling mill to determine the magnitude and phase relationship of the eccentricity of each back-up roll of a four high roll stand, to monitor the rotation of the back-up rolls during the rolling process, and for each back up roll to correct the roll vertical position as a function of the roll angular position to compensate for the eccentricity of the respective back-up rolls as they rotate. This correction will remove the workpiece delivery gauge error induced by the eccentricity, and the gauge error induced by the improper response of the roll force gauge control equation to the eccentricity, particularly for application of a roll force gauge control system.
Inventors
- 👤 John W Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:15
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/58; B21B37/66
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
A method of controlling the delivery gauge of a workpiece operative with a rolling mill stand having a pair of work rolls between which said workpiece is passed, and a pair of back-up rolls, with each said work roll being operative with a different back-up roll having eccentricity, said method including the steps of: establishing the maximum value of said eccentricity of at least one of said back-up rolls in relation to a plurality of angular positions of that said back-up roll before said workpiece is passed between said work rolls, sensing the angular position of said one back-up roll with said workpiece passing between said work rolls, determining a portion of said maximum value of eccentricity of said back-up roll in relation to said sensed angular position, and controlling the delivery gauge of said workpiece passed between said work rolls in relation to said portion of said eccentricity of said back-up roll.
Claim 2
Independent Claim
153 words
A method of controlling the delivery gauge of a workpiece operative with a rolling mill stand having a pair of work rolls between which said workpiece is passed, and a pair of back-up rolls, with each said work roll being operative with a different back-up roll having eccentricity, said method including the steps of: establishing the maximum value of said eccentricity of at least one of said back-up rolls in relation to a plurality of angular positions of that said back-up roll before said workpiece is passed between said work rolls, sensing the angular position of said one back-up roll with said workpiece passing between said work rolls, determining a portion of said maximum value of eccentricity of said back-up roll in relation to said sensed angular position, and controlling the delivery gauge of said workpiece passed between said work rolls in relation to said portion of said eccentricity of said back-up roll.
Claim 3
Dependent Claim
53 words
The method of claim 1, with said step of determining a portion of said maximum value of eccentricity of said back-up roll including the provision of an output signal in accordance with said portion, and with said step of controlling the delivery gauge of said workpiece being in response to said output signal.
Claim 4
Dependent Claim
27 words
The method of claim 1, with said step of establishing the maximum value of said eccentricity operating in accordance with the roll force between said work rolls.
Claim 5
Dependent Claim
28 words
The method of claim 1, including the step of positioning said one back-up roll in accordance with a predetermined angular position of at least said one back-up roll.
Claim 6
Dependent Claim
46 words
The method of claim 1, with said step of determining a portion of said maximum value of eccentricity of said back-up roll being in relation to a predetermined position of said back-up roll where said portion is substantially equal to said maximum value of said eccentricity.
Claim 7
Independent Claim
166 words
An apparatus for controlling the delivery gauge of a workpiece passing through a roll stand having a pair of work rolls positioned between respective back-up rolls, the combination of: means for determining the delivery gauge of said workpiece leaving said roll stand in relation to the measured roll force between said work rolls and the known elasticity characteristic of said roll stand, means for determining the maximum eccentricity of one of said back-up rolls in relation to a plurality of angular positions of said one back-up roll before said workpiece is passed between said work rolls, means for determining an error in said delivery gauge in relation to said maximum eccentricity of said one back-up roll having a known angular position and in relation to the measured roll force between said work rolls corresponding to said angular position, and controlling said delivery gauge of said workpiece in relation to said angular position of said one back-up roll in accordance with a predetermined relationship including said error.
Claim 8
Independent Claim
166 words
An apparatus for controlling the delivery gauge of a workpiece passing through a roll stand having a pair of work rolls positioned between respective back-up rolls, the combination of: means for determining the delivery gauge of said workpiece leaving said roll stand in relation to the measured roll force between said work rolls and the known elasticity characteristic of said roll stand, means for determining the maximum eccentricity of one of said back-up rolls in relation to a plurality of angular positions of said one back-up roll before said workpiece is passed between said work rolls, means for determining an error in said delivery gauge in relation to said maximum eccentricity of said one back-up roll having a known angular position and in relation to the measured roll force between said work rolls corresponding to said angular position, and controlling said delivery gauge of said workpiece in relation to said angular position of said one back-up roll in accordance with a predetermined relationship including said error.
Claim 9
Dependent Claim
41 words
The apparatus of claim 6, including means for positioning said one back-up roll in each of a plurality of predetermined angular positions, with said means for determining the maximum eccentricity being operative in relation to each of said predetermined angular positions
Claim 10
Dependent Claim
28 words
The apparatus of claim 6, with said means for determining the maximum eccentricity being operative in relation to a predetermined zero angular position of said one back-up roll.
Claim 11
Dependent Claim
44 words
The apparatus of claim 6, with said means for determining the maximum eccentricity of one of said back-up rolls being operative to determine the maximum eccentricity of the other of said back-up rolls in relation to predetermined angular positions of said other back-up roll.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |