US4037087A
Expired / Lapsed
US
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Rolling mill control method and apparatus having operator update of presets
Assignee: Bethlehem Steel Corp
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Filing: 1976-05-27
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Granted: 1977-07-19
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Expires: 1996-05-27
Abstract
Abstract Rolling mill computer control system includes an operator update program which accepts requests from a mill operator to modify computer setups for speed and screwdown presets. When under computer control and abnormal mill conditions arise, the computer programs will accept operator updates from the same presetting devices which are used in manual operation. The operator update program calculates speed and draft coefficients which are used to update the basic computer schedule calculations so as to accommodate the abnormal mill conditions. Additional presetting devices, such as load distribution switches, are eliminated so as to minimize operator confusion and simplify operator panel layout.
Inventors
- 👤 John G. Foulds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:54
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/16; B21B1/00; B21B1/22; B21B1/24; B21B1/26
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
104 words
A method of controlling a rolling mill having a presettable operating parameter, which method comprises: (a) establishing a rolling schedule after receiving input data, (b) presetting the mill operating parameter to a reference level obtained from the rolling schedule and operating the mill parameter at said reference level during an automatic mode of operation, (c) calculating a modifier for the preset reference level during mill operation in response to an operator updating the parameter preset device, the same preset device being used for a second mode of mill operation, and (d) subsequently adjusting the mill operating parameter reference level proportional to the calculated modifier.
Claim 2
Independent Claim
104 words
A method of controlling a rolling mill having a presettable operating parameter, which method comprises: (a) establishing a rolling schedule after receiving input data, (b) presetting the mill operating parameter to a reference level obtained from the rolling schedule and operating the mill parameter at said reference level during an automatic mode of operation, (c) calculating a modifier for the preset reference level during mill operation in response to an operator updating the parameter preset device, the same preset device being used for a second mode of mill operation, and (d) subsequently adjusting the mill operating parameter reference level proportional to the calculated modifier.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the operating parameter is mill speed.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the operating parameter is roll screw position.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein step (c) is performed by a programmed computer which includes an operator update program.
Claim 6
Dependent Claim
24 words
The method of claim 1 wherein steps (a) through (c) are performed by a programmed computer which includes schedulle calculation and operator update programs.
Claim 7
Independent Claim
129 words
A method of controlling a multi-stand rolling mill having a presettable operating parameter for each mill stand, which method comprises: (a) establishing a multi-stand rolling schedule for each stand after receiving input data, (b) presetting the mill operating parameter for each stand at a corresponding reference level obtained from the rolling schedule and operating the mill parameter at said reference level during an automatic mode of operation, (c) calculating a modifier for the preset reference level of at least one stand during mill operation in response to an operator updating a corresponding parameter preset device, the same preset device being used for a second mode of mill operation, and (d) subsequently adjusting the mill operating parameter reference level of at least one stand proportional to a corresponding calculated modifier.
Claim 8
Independent Claim
129 words
A method of controlling a multi-stand rolling mill having a presettable operating parameter for each mill stand, which method comprises: (a) establishing a multi-stand rolling schedule for each stand after receiving input data, (b) presetting the mill operating parameter for each stand at a corresponding reference level obtained from the rolling schedule and operating the mill parameter at said reference level during an automatic mode of operation, (c) calculating a modifier for the preset reference level of at least one stand during mill operation in response to an operator updating a corresponding parameter preset device, the same preset device being used for a second mode of mill operation, and (d) subsequently adjusting the mill operating parameter reference level of at least one stand proportional to a corresponding calculated modifier.
Claim 9
Dependent Claim
15 words
The method of claim 6 wherein the operating parameter for each stand is mill speed.
Claim 10
Dependent Claim
16 words
The method of claim 6 wherein the operating parameter for each stand is roll screw position.
Claim 11
Dependent Claim
25 words
The method of claim 6 wherein step (c) is performed by a programmed computer which includes an operator update program associated with each mill stand.
Claim 12
Dependent Claim
21 words
The method of claim 6 wherein step (d) adjusts the mill operating parameter reference level of a plurality of adjacent stands.
Claim 13
Dependent Claim
29 words
The method of claim 6 wherein steps (a) through (d) are performed by a programmed computer which includes schedule calculation and operator update programs associated with each mill stand.
Claim 14
Independent Claim
149 words
A method of controlling a multi-stand rolling mill having presettable speed and screwdown parameters for each mill stand, which method comprises: (a) establishing a multi-stand rolling schedule for said stands after receiving input data, (b) presetting the mill speed and screwdown parameters for each stand at a corresponding reference level obtained from the rolling schedule and operating the mill parameters at said reference level during an automatic mode of operation, (c) calculating a modifier for at least one speed or screwdown preset reference level of at least one mill stand during mill operation, said calculation occurring in response to an operator updating at least one corresponding speed or screwdown preset device, the same preset device being used for a second mode of mill operation, and (d) subsequently adjusting at least one speed or screwdown preset reference level of at least one mill stand proportional to a corresponding calculated modifier.
Claim 15
Independent Claim
149 words
A method of controlling a multi-stand rolling mill having presettable speed and screwdown parameters for each mill stand, which method comprises: (a) establishing a multi-stand rolling schedule for said stands after receiving input data, (b) presetting the mill speed and screwdown parameters for each stand at a corresponding reference level obtained from the rolling schedule and operating the mill parameters at said reference level during an automatic mode of operation, (c) calculating a modifier for at least one speed or screwdown preset reference level of at least one mill stand during mill operation, said calculation occurring in response to an operator updating at least one corresponding speed or screwdown preset device, the same preset device being used for a second mode of mill operation, and (d) subsequently adjusting at least one speed or screwdown preset reference level of at least one mill stand proportional to a corresponding calculated modifier.
Claim 16
Dependent Claim
31 words
The method of claim 12 wherein step (c) is performed by a programmed computer which includes an operator update program associated with each speed or screwdown preset for each mill stand.
Claim 17
Dependent Claim
35 words
The method of claim 12 wherein steps (a) through (d) are performed by a programmed computer which includes schedule calculation and operator update programs for each speed or screwdown preset associated with each mill stand.
Claim 18
Dependent Claim
118 words
Apparatus for controlling a rolling mill having a presettable operating parameter, comprising: (a) means for controlling mill operation in response to an operating parameter preset signal, (b) means receiving input data signals and establishing a rolling schedule, said means generating the parameter preset signal at a reference level determined by the rolling schedule in effect during an automatic mode of mill operation, (c) means for calculating a modifier for the parameter preset signal during mill operation in response to an operator updating a parameter preset device, the same preset device being used during a second mode of operation, and (d) means for subsequently adjusting the reference level of said parameter preset signal in proportion to the calculated modifier.
Claim 19
Dependent Claim
118 words
Apparatus for controlling a rolling mill having a presettable operating parameter, comprising: (a) means for controlling mill operation in response to an operating parameter preset signal, (b) means receiving input data signals and establishing a rolling schedule, said means generating the parameter preset signal at a reference level determined by the rolling schedule in effect during an automatic mode of mill operation, (c) means for calculating a modifier for the parameter preset signal during mill operation in response to an operator updating a parameter preset device, the same preset device being used during a second mode of operation, and (d) means for subsequently adjusting the reference level of said parameter preset signal in proportion to the calculated modifier.
Claim 20
Dependent Claim
12 words
The apparatus of claim 15 wherein the operating parameter is mill speed.
Claim 21
Dependent Claim
13 words
The apparatus of claim 15 wherein the operating parameter is roll screw position.
Claim 22
Dependent Claim
21 words
The apparatus of claim 15 wherein means (c) is incorporated in a programmed computer adapted to include an operator update program.
Claim 23
Dependent Claim
25 words
The apparatus of claim 15 wherein means (b) through (d) are incorporated in a programmed computer adapted to include schedule calculation and operator update programs.
Claim 24
Dependent Claim
132 words
Apparatus for controlling a multi-stand rolling mill having a presettable operating parameter, comprising: (a) means for controlling multi-stand mill operation in response to respective operating parameter preset signals, (b) means receiving input data signals and establishing a multi-stand rolling schedule, said means generating individual parameter preset signals at a reference level determined for each stand by the rolling schedule in effect during an automatic mode of mill operation, (c) means for calculating a modifier for at least one parameter preset signal during mill operation in response to an operator updating a corresponding parameter preset device, the same preset device being used during a second mode of operation, and (d) means for subsequently adjusting the reference level of said parameter preset signal for at least one stand in proportion to the calculated modifier.
Claim 25
Dependent Claim
132 words
Apparatus for controlling a multi-stand rolling mill having a presettable operating parameter, comprising: (a) means for controlling multi-stand mill operation in response to respective operating parameter preset signals, (b) means receiving input data signals and establishing a multi-stand rolling schedule, said means generating individual parameter preset signals at a reference level determined for each stand by the rolling schedule in effect during an automatic mode of mill operation, (c) means for calculating a modifier for at least one parameter preset signal during mill operation in response to an operator updating a corresponding parameter preset device, the same preset device being used during a second mode of operation, and (d) means for subsequently adjusting the reference level of said parameter preset signal for at least one stand in proportion to the calculated modifier.
Claim 26
Dependent Claim
15 words
The apparatus of claim 20 wherein the operating parameter for each stand is mill speed.
Claim 27
Dependent Claim
16 words
The apparatus of claim 20 wherein the operating parameter for each stand is roll screw position.
Claim 28
Dependent Claim
26 words
The apparatus of claim 20 wherein means (c) is incorporated in a programmed computer adapted to include an operator update program associated with each mill stand.
Claim 29
Dependent Claim
26 words
The apparatus of claim 20 wherein means (d) is adapted to adjust the reference level of said parameter preset signals for a plurality of adjacent stands.
Claim 30
Dependent Claim
30 words
The apparatus of claim 20 wherein means (b) through (d) are incorporated in a programmed computer adapted to include schedule calculation and operator update programs associated with each mill stand.
Claim 31
Dependent Claim
153 words
Apparatus for controlling a multi-stand rolling mill having presettable speed and screwdown parameters for each mill stand, comprising: a. means for controlling multi-stand mill operation in response to respective speed and screwdown preset signals, (b) means receiving input signals and establishing a multi-stand rolling schedule, said means generating individual speed and screwdown preset signals at a reference level determined for each stand by the rolling schedule in effect during an automatic mode of operation, (c) means for calculating a modifier for at least one speed or screwdown preset signal for at least one stand during mill operation in response to an operator updating at least one corresponding speed or screwdown preset device, the same preset device being used during a second mode of operation, and (d) means for subsequently adjusting the reference level of at least one speed or screwdown preset signal for at least one stand proportional to a corresponding calculated modifier.
Claim 32
Dependent Claim
153 words
Apparatus for controlling a multi-stand rolling mill having presettable speed and screwdown parameters for each mill stand, comprising: a. means for controlling multi-stand mill operation in response to respective speed and screwdown preset signals, (b) means receiving input signals and establishing a multi-stand rolling schedule, said means generating individual speed and screwdown preset signals at a reference level determined for each stand by the rolling schedule in effect during an automatic mode of operation, (c) means for calculating a modifier for at least one speed or screwdown preset signal for at least one stand during mill operation in response to an operator updating at least one corresponding speed or screwdown preset device, the same preset device being used during a second mode of operation, and (d) means for subsequently adjusting the reference level of at least one speed or screwdown preset signal for at least one stand proportional to a corresponding calculated modifier.
Claim 33
Dependent Claim
33 words
The apparatus of claim 26 wherein means (c) is incorporated in a programmed computer adapted to include an operator update program associated with each speed or screwdown preset signal for each mill stand.
Claim 34
Dependent Claim
36 words
The apparatus of claim 26 wherein means (b) through (d) are incorporated in a programmed computer adapted to include schedule calculation and operator update programs for each speed or screwdown preset associated with each mill stand.
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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |