Patent US3756050A successfully refreshed from Google Patents.
US3756050A
Expired / Lapsed
US
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Method and apparatus for controlling metal strip shape
Assignee: Toshiba Corp
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Filing: 1972-03-06
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Granted: 1973-09-04
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Expires: 1992-03-06
Abstract
Abstract A process and apparatus for rolling a metal strip whereby the waviness of the strip in the direction of the strip thickness is detected at a plurality of locations along the width of the strip, while the strip is under tension, during the rolling operation. The roll crown and/or the rolling load is selectively controlled in response to the detected waviness Delta h in accordance with the relation Delta h Embij + F, where i and j are variables indicating the position of sensors, m is a parameter relating to tension of the strip, b is the output waviness under no tension and E and F are constants. The shape variations b in the resulting output metal strip, under no tension, which are not actually determined until after a very long period of time, such as during the next manufacturing process, are maintained within predetermined tolerances by said preliminary control during the rolling operation.
Inventors
- 👤 T Kusakabe
- 👤 M Kubo
- 👤 K Asano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:43
CPC Classifications
B; B21; B21B; B21B38/00; B21B38/02; G; G01; G01B; G01B7/00; G01B7/28; G01B7/287; B21B1/00; B21B1/22; B21B2001/228; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
133 words
A method for controlling the output shape of a metal strip during a rolling operation comprising the steps of: detecting, at the output of a roll stand, the waviness ( Delta h) of said strip in the direction of the strip thickness at a plurality of locations along the width of said strip; and selectively controlling the roll crown and the rolling load in response to the function of bij in accordance with the relation Delta h Embij + F, where i and j are variables indicating the position of the sensors, m is a parameter which is a function of tension, b is the output waviness under no tension and E and F are constants, to thereby reduce said shape variations (b) in the resulting output metal strip to within predetermined limits.
Claim 2
Independent Claim
133 words
A method for controlling the output shape of a metal strip during a rolling operation comprising the steps of: detecting, at the output of a roll stand, the waviness ( Delta h) of said strip in the direction of the strip thickness at a plurality of locations along the width of said strip; and selectively controlling the roll crown and the rolling load in response to the function of bij in accordance with the relation Delta h Embij + F, where i and j are variables indicating the position of the sensors, m is a parameter which is a function of tension, b is the output waviness under no tension and E and F are constants, to thereby reduce said shape variations (b) in the resulting output metal strip to within predetermined limits.
Claim 3
Dependent Claim
30 words
The method according to claim 1 wherein said detecting step includes simultaneously detecting said waviness at substantially the center portion of said strip and at each side of said strip.
Claim 4
Dependent Claim
56 words
The method according to claim 1 wherein the tension in said strip varies along the length thereof and the waviness ( Delta h) during rolling varies along the length thereof and wherein the term i and j in the relation Delta h Embij + F represent values for given positions along the length of said strip.
Claim 5
Dependent Claim
24 words
The method according to claim 2 including controlling the roll crown responsible to the difference between waviness by said center detector and side detector.
Claim 6
Dependent Claim
21 words
The method according to claim 2 including controlling said rolling load responsive to the difference between waviness by said side detectors.
Claim 7
Dependent Claim
187 words
Apparatus for controlling the shape of a metal strip during a rolling operation comprising: a plurality of non-contact detectors located at different respective positions along the width of said strip and located at the output of a roll stand of a rolling mill, said detectors detecting the waviness ( Delta h) of said strip in the direction of the strip thickness during the rolling operation; circuit means coupled to said non-contact detectors for generating signals representing said detected waviness; a discriminating circuit coupled to the output of said circuit means; and control means responsive to the outputs of said circuit means and to the output of said discriminating circuit for selectively controlling the roll crown and the rolling load in response to the function of bij in accordance with the relation Delta h Embij + F, where i and j are variables indicating the positions of the sensors, m is a parameter which is a function of tension, b is the output waviness under no tension and E and F are constants, to thereby reduce the waviness in the resulting output metal strip to within predetermined limits.
Claim 8
Dependent Claim
187 words
Apparatus for controlling the shape of a metal strip during a rolling operation comprising: a plurality of non-contact detectors located at different respective positions along the width of said strip and located at the output of a roll stand of a rolling mill, said detectors detecting the waviness ( Delta h) of said strip in the direction of the strip thickness during the rolling operation; circuit means coupled to said non-contact detectors for generating signals representing said detected waviness; a discriminating circuit coupled to the output of said circuit means; and control means responsive to the outputs of said circuit means and to the output of said discriminating circuit for selectively controlling the roll crown and the rolling load in response to the function of bij in accordance with the relation Delta h Embij + F, where i and j are variables indicating the positions of the sensors, m is a parameter which is a function of tension, b is the output waviness under no tension and E and F are constants, to thereby reduce the waviness in the resulting output metal strip to within predetermined limits.
Claim 9
Dependent Claim
13 words
Apparatus according to claim 6 wherein said detectors are spaced from said strip.
Claim 10
Dependent Claim
24 words
Apparatus according to claim 6 wherein said detectors are located at substantially the center of said strip and at each side of said strip.
Claim 11
Dependent Claim
28 words
Apparatus according to claim 8 wherein said control means controls the roll crown responsive to the difference between the waviness detected by said center detector and side detector.
Claim 12
Dependent Claim
25 words
Apparatus according to claim 8 wherein said control means controls said rolling load responsive to the difference between the waviness detected by said side detectors.
Claim 13
Dependent Claim
24 words
Apparatus according to claim 8 wherein said discriminating circuit is responsive to predetermined variations in said waviness to inhibit controlling of said rolling load.
Claim 14
Dependent Claim
45 words
Apparatus according to claim 11 wherein said discriminating circuit is responsive to signals indicating that said waviness caused by maladjustment of roll crown have been substantially eliminated to cause said control means to control said rolling load to substantially eliminate waviness in said output strip.
Claim 15
Dependent Claim
39 words
Apparatus according to claim 6 wherein said control means includes first computing means responsive to predetermined waviness variations for controlling said roll crown and second computing means responsive to the other predetermined waviness variations for controlling said rolling load.
References Cited (Backward Citations)
US3475935A
Cited
US3496744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |