US3795124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of detecting and compensating for defects on rolling mill rolls and means for applying this method
Assignee: Societe Nouvelle Spidem
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Filing: 1973-05-07
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Granted: 1974-03-05
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Expires: 1993-05-07
Abstract
Abstract Method and device for detecting and compensating defects in rolling mill cylinders, characterized in that the fluctuations of the idle pressure of the fluid contained in the hydraulic jacks arranged between shoulders fast with the working chocks of the machine and the corresponding upright of the latter, are picked up, recorded and then restored during normal operation, with a view to controlling the compensation.
Inventors
- 👤 L Diolot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:24
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/58; B21B37/66
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
171 words
In an apparatus for detecting defects in the rolls of a rolling mill, said rolling mill being of the known type that has (a) a stand, (b) backing-up rolls, (c) first chocks supporting said backing-up rolls and movably held in said stand, (d) working rolls one associated with each backing-up roll, (e) second chocks supporting said working rolls and movably held with respect to said first chocks, and a regulating system, the improvement comrising, A. means associated with each working roll and defining a closed space containing locked-in hydraulic fluid, B. hydraulic jack means in engagement with said second chocks and communicating with said means defining a closed space, said hydraulic jack means having 1. a movable part, 2. a stationary part integral with one of said first chocks and C. sensing means connected to said means defining a closed space; said sensing means responding to pressure fluctuations in said hydraulic fluid caused by a fluctuating motion of said second chocks and storing same for later use by the regulating system.
Claim 2
Dependent Claim
171 words
In an apparatus for detecting defects in the rolls of a rolling mill, said rolling mill being of the known type that has (a) a stand, (b) backing-up rolls, (c) first chocks supporting said backing-up rolls and movably held in said stand, (d) working rolls one associated with each backing-up roll, (e) second chocks supporting said working rolls and movably held with respect to said first chocks, and a regulating system, the improvement comrising, A. means associated with each working roll and defining a closed space containing locked-in hydraulic fluid, B. hydraulic jack means in engagement with said second chocks and communicating with said means defining a closed space, said hydraulic jack means having 1. a movable part, 2. a stationary part integral with one of said first chocks and C. sensing means connected to said means defining a closed space; said sensing means responding to pressure fluctuations in said hydraulic fluid caused by a fluctuating motion of said second chocks and storing same for later use by the regulating system.
Claim 3
Dependent Claim
114 words
In an apparatus for detecting defects in the rolls of a rolling mill, said rolling mill being of the known type that has (a) a stand, (b) backing-up rolls, (c) first chocks supporting said backing-up rolls and movably held in said stand, (d) working rolls one associated with each backing-up roll, (e) second chocks supporting said working rolls and movably held with respect to said first chocks, and a regulating system, the improvement comprising, A. means associated with each working roll and defining a closed space containing locked-up hydraulic fluid, B. hydraulic jack means in engagement with said second chocks and communicating with said means defining a closed space, said hydraulic jack means having
Claim 4
Dependent Claim
114 words
In an apparatus for detecting defects in the rolls of a rolling mill, said rolling mill being of the known type that has (a) a stand, (b) backing-up rolls, (c) first chocks supporting said backing-up rolls and movably held in said stand, (d) working rolls one associated with each backing-up roll, (e) second chocks supporting said working rolls and movably held with respect to said first chocks, and a regulating system, the improvement comprising, A. means associated with each working roll and defining a closed space containing locked-up hydraulic fluid, B. hydraulic jack means in engagement with said second chocks and communicating with said means defining a closed space, said hydraulic jack means having
Claim 5
Dependent Claim
52 words
a stationary part integral with one of said first chocks and C. sensing means connected to said means defining a closed space; said sensing means responding to pressure fluctuations in said hydraulic fluid caused by a fluctuating motion of said second chocks and storing same for later use by the regulating system.
Claim 6
Dependent Claim
52 words
a stationary part integral with one of said first chocks and C. sensing means connected to said means defining a closed space; said sensing means responding to pressure fluctuations in said hydraulic fluid caused by a fluctuating motion of said second chocks and storing same for later use by the regulating system.
Claim 7
Dependent Claim
49 words
a stationary part integral with said stand, and C. sensing means connected to said means defining a closed space; said sensing means responding to pressure fluctuations in said hydraulic fluid caused by a fluctuating motion of said second chocks and storing same for later use by the regulating system.
Claim 8
Dependent Claim
49 words
a stationary part integral with said stand, and C. sensing means connected to said means defining a closed space; said sensing means responding to pressure fluctuations in said hydraulic fluid caused by a fluctuating motion of said second chocks and storing same for later use by the regulating system.
Claim 9
Dependent Claim
178 words
In an apparatus for detecting defects in the rolls of a rolling mill, said rolling mill being of the known type that has (a) a stand, (b) backing-up rolls, (c) first chocks supporting said backing-up rolls and movably held in said stand, (d) working rolls one associated with each backing-up roll, (e) second chocks supporting said working rolls and movably held with respect to said first chocks and a regulating system, the improvement comprising, A. means associated with each working roll and defining a closed space containing locked-in hydraulic fluid, B. hydraulic jack means in engagement with said second chocks and communicating with said means defining a closed space, said hydraulic jack means including a piston, C. an integral shoulder forming part of at least one of said second chocks, said integral shoulder cooperating with said piston and D. sensing means connected to said means defining a closed space; said sensing means responding to pressure fluctuations in said hydraulic fluid caused by fluctuating motion of said second chocks and storing same for later use by the regulating system.
Claim 10
Dependent Claim
178 words
In an apparatus for detecting defects in the rolls of a rolling mill, said rolling mill being of the known type that has (a) a stand, (b) backing-up rolls, (c) first chocks supporting said backing-up rolls and movably held in said stand, (d) working rolls one associated with each backing-up roll, (e) second chocks supporting said working rolls and movably held with respect to said first chocks and a regulating system, the improvement comprising, A. means associated with each working roll and defining a closed space containing locked-in hydraulic fluid, B. hydraulic jack means in engagement with said second chocks and communicating with said means defining a closed space, said hydraulic jack means including a piston, C. an integral shoulder forming part of at least one of said second chocks, said integral shoulder cooperating with said piston and D. sensing means connected to said means defining a closed space; said sensing means responding to pressure fluctuations in said hydraulic fluid caused by fluctuating motion of said second chocks and storing same for later use by the regulating system.
Claim 11
Independent Claim
196 words
A method of detecting and compensating defects in the rolls of a rolling mill having working rolls, working roll-supporting chocks, backing-up rolls, backing-up roll supporting chocks, a hydraulic pressure circuit for detecting fluctating motions of the working roll-supporting chocks and a regulating system connected with the working roll-supporting chocks comprising the following steps: A. causing said rolls to rotate in an idle run, whereby fluctuating motions of the working roll-supporting chocks occur in response to said defects in said rolls, B. maintaining a clearance between the cooperating working rolls of the rolling mill for the duration of said idle run, C. transmitting said fluctuating motions of each working roll-supporting chock to a separate enclosed volume of fluid to vary the pressure thereof in response to said fluctuating motions, D. maintaining at least one working roll in engagement with its associated backing-up roll for the duration of each idle run, whereby the fluctuating motions of a supporting chock of the working roll engaged by its associated backing-up roll are transmitted to said fluid, E. sensing the pressure variations of said liquid and F. transforming said pressure variations into useful signals to be used by the regulating system.
Claim 12
Independent Claim
196 words
A method of detecting and compensating defects in the rolls of a rolling mill having working rolls, working roll-supporting chocks, backing-up rolls, backing-up roll supporting chocks, a hydraulic pressure circuit for detecting fluctating motions of the working roll-supporting chocks and a regulating system connected with the working roll-supporting chocks comprising the following steps: A. causing said rolls to rotate in an idle run, whereby fluctuating motions of the working roll-supporting chocks occur in response to said defects in said rolls, B. maintaining a clearance between the cooperating working rolls of the rolling mill for the duration of said idle run, C. transmitting said fluctuating motions of each working roll-supporting chock to a separate enclosed volume of fluid to vary the pressure thereof in response to said fluctuating motions, D. maintaining at least one working roll in engagement with its associated backing-up roll for the duration of each idle run, whereby the fluctuating motions of a supporting chock of the working roll engaged by its associated backing-up roll are transmitted to said fluid, E. sensing the pressure variations of said liquid and F. transforming said pressure variations into useful signals to be used by the regulating system.
Claim 13
Dependent Claim
223 words
In an apparatus for detecting and compensating defects in the rolls of a rolling mill, said rolling mill being of the known type that has (a) a stand, (b) backing-up rolls, (c) first chocks supporting said backing-up rolls and movably held in said stand, (d) working rolls, one associated with each backing-up roll, (e) second chocks supporting said working rolls and movably held with respect to said first chocks, (f) a regulating system, (g) hydraulic pressure means operatively connected to said second chocks, said hydraulic pressure means including jacks, one in engagement with each second chock, hydraulic compression chambers, each accommodating a separate jack and a hydraulic circuit for supplying hydraulic liquid to said hydraulic compression chambers, the position of each jack in its associated hydraulic compression chamber and the pressure in the latter being interdependent values, the improvement comprising A. means for converting at will said hydraulic circuit into separate closed spaces each containing locked-in hydraulic fluid and each including one of said hydraulic compression chambers and B. sensing means communicating with each said closed space, said sensing means responding to pressure fluctuations in said locked-in hydraulic fluid caused by a fluctuating motion of said second chocks and storing same for later use by the regulating system, whereby defects in said rolls are sensed during idle test runs of said rolling mill.
Claim 14
Dependent Claim
223 words
In an apparatus for detecting and compensating defects in the rolls of a rolling mill, said rolling mill being of the known type that has (a) a stand, (b) backing-up rolls, (c) first chocks supporting said backing-up rolls and movably held in said stand, (d) working rolls, one associated with each backing-up roll, (e) second chocks supporting said working rolls and movably held with respect to said first chocks, (f) a regulating system, (g) hydraulic pressure means operatively connected to said second chocks, said hydraulic pressure means including jacks, one in engagement with each second chock, hydraulic compression chambers, each accommodating a separate jack and a hydraulic circuit for supplying hydraulic liquid to said hydraulic compression chambers, the position of each jack in its associated hydraulic compression chamber and the pressure in the latter being interdependent values, the improvement comprising A. means for converting at will said hydraulic circuit into separate closed spaces each containing locked-in hydraulic fluid and each including one of said hydraulic compression chambers and B. sensing means communicating with each said closed space, said sensing means responding to pressure fluctuations in said locked-in hydraulic fluid caused by a fluctuating motion of said second chocks and storing same for later use by the regulating system, whereby defects in said rolls are sensed during idle test runs of said rolling mill.
Claim 15
Dependent Claim
25 words
An improvement as defined in claim 5, wherein said jacks constitute balancing jacks for said second chocks during normal rolling operation of said rolling mill.
References Cited (Backward Citations)
US3331229A
Cited
US3460365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |