US3677045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of feed-forwardly controlling a tandem rolling mill
Assignee: JFE Engineering Corp
•
Filing: 1969-11-19
•
Granted: 1972-07-18
•
Expires: 1989-11-19
Abstract
Abstract The thickness of the input material is measured at the entry side of the first roll stand and this value is related to the predetermined desired final thickness of the output material of the mill. The screw down mechanism of the first roll stand and the peripheral speed of the rolls of the first roll stand are then adjusted as a function of the measured and desired final thicknesses to produce an output strip having uniform thickness. The screw down and peripheral roll speeds are adjusted to maintain the incoming volumetric feed rate of the input material substantially constant.
Inventors
- 👤 Tohru Arimura
- 👤 Masamoto Kamata
- 👤 Morio Saito
- 👤 Hiromu Suzuki
- 👤 Masakazu Iguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:16
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/16; B21B37/165; B21B1/00; B21B1/22; B21B1/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
139 words
Apparatus for use in a tandem rolling mill during continuous operation thereof to produce output material having a predetermined desired thickness using a feed-forward technique, comprising: a thickness measuring device located at the entry side of a first roll stand of said mill for measuring the thickness of the input material; means responsive to said measuring device and to said predetermined thickness of the output material to adjust the screw down mechanism of said first roll stand, and responsive to said measuring device said desired output material thickness and the forward slip rate at said first roll stand to adjust the peripheral speed of the rolls of said first roll stand so that the incoming volumetric freed rate of said input material is substantially constant, and so that the output material from said rolling mill has said predetermined thickness.
Claim 2
Dependent Claim
139 words
Apparatus for use in a tandem rolling mill during continuous operation thereof to produce output material having a predetermined desired thickness using a feed-forward technique, comprising: a thickness measuring device located at the entry side of a first roll stand of said mill for measuring the thickness of the input material; means responsive to said measuring device and to said predetermined thickness of the output material to adjust the screw down mechanism of said first roll stand, and responsive to said measuring device said desired output material thickness and the forward slip rate at said first roll stand to adjust the peripheral speed of the rolls of said first roll stand so that the incoming volumetric freed rate of said input material is substantially constant, and so that the output material from said rolling mill has said predetermined thickness.
Claim 3
Dependent Claim
79 words
Apparatus according to claim 1 further comprising: a second thickness measuring device located at the output side of said first roll stand for measuring the thickness of the output material from said first roll stand; means indicating the desired thickness of the output material from said first roll stand; and means responsive to said second measuring device and to said indicating means to further adjust said screw down mechanism and said peripheral speed of said rolls by feed back.
Claim 4
Dependent Claim
139 words
A feed-forward method for continuously controlling a tandem rolling mill during continuous operation thereof to produce output material having a predetermined desired thickness, comprising the steps of: detecting the thickness of the input material at the entry side of a first roll stand of said mill during the rolling operation; adjusting the screw down mechanism of said first roll stand during said rolling operation as a function of the detected thickness of the input material to said first roll stand and as a function of said predetermined thickness of the final output material; and simultaneously adjusting the peripheral speed of the rolls of said first roll stand during said rolling operation as a function of the forward slip rate for said detected thickness, to cause the final output material from said rolling mill to have said predetermined desired thickness.
Claim 5
Dependent Claim
139 words
A feed-forward method for continuously controlling a tandem rolling mill during continuous operation thereof to produce output material having a predetermined desired thickness, comprising the steps of: detecting the thickness of the input material at the entry side of a first roll stand of said mill during the rolling operation; adjusting the screw down mechanism of said first roll stand during said rolling operation as a function of the detected thickness of the input material to said first roll stand and as a function of said predetermined thickness of the final output material; and simultaneously adjusting the peripheral speed of the rolls of said first roll stand during said rolling operation as a function of the forward slip rate for said detected thickness, to cause the final output material from said rolling mill to have said predetermined desired thickness.
Claim 6
Dependent Claim
29 words
A method according to claim 3 wherein the peripheral speed of said rolls is adjusted additionally as a function of said detected and predetermined final thicknesses of said material.
Claim 7
Dependent Claim
30 words
A method according to claim 3 wherein said screw down mechanism and roll peripheral speed are adjusted to maintain the incoming volumetric feed rate of said input material substantially constant.
Claim 8
Dependent Claim
58 words
A method according to claim 3 further comprising the steps of: detecting the thickness of the material at the output of said first roll stand; comparing the detected output thickness with the desired thickness of the output mateRial of said first stand; and further adjusting said screw down mechanism as a function of said comparison by feed back.
Claim 9
Dependent Claim
48 words
A method according to claim 3 comprising delaying adjusting of the screw down mechanism of said first roll for a predetermined period of time substantially corresponding to the amount of time required for the strip to pass from the point of thickness detection to the first roll stand.
Claim 10
Dependent Claim
49 words
A method according to claim 3 comprising delaying adjusting the peripheral speed of the rolls of the first stand for a predetermined period of time substantially corresponding to the amount of time required for the strip to pass from the point of thickness detection to the first roll stand.
Claim 11
Dependent Claim
51 words
Apparatus according to claim 1 wherein said adjusting means includes first delay means for delaying adjustment of said screw down mechanism of said first roll by a time corresponding to the amount of time required for the strip to pass from the point of thickness detection to the first roll stand.
Claim 12
Dependent Claim
56 words
Apparatus according to claim 1 wherein said adjusting means includes a second delay for delaying adjusting of said peripheral speed of said rolls of said first stand by a predetermined time which substantially corresponds to the amount of time required for the strip to pass from the point of thickness detection to the first roll stand.
References Cited (Backward Citations)
US2325190A
Cited
US2883895A
Cited
US3049036A
Cited
US3101016A
Cited
US3169421A
Cited
US3186201A
Cited
US3170344A
Cited
US3212310A
Cited
US3332263A
Cited
US3507134A
Cited
US3531961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |