US3918302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling mill test equipment
Assignee: British Steel Corp
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Filing: 1974-08-29
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Granted: 1975-11-11
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Expires: 1994-08-29
Abstract
Abstract Apparatus for testing the characteristics of a rolling mill stand which has been set up prior to rolling. Two rigid arms are pivoted together, and each arm is secured to a work roll mounting. A loading device which can apply a constant or varying force is positioned between the arms, thereby simulating a typical load on the mill stand. The apparatus includes means for accurately determining the separating load and also for measuring the separation of the work roll arms. The apparatus can thereby be used to check the mill load cells and to measure the mill stiffness as well as the response of the mill control system. A further feature of the apparatus includes an attached rod which passes between the rolls of an adjacent mill stand and connects with a set of rollers which bear on the surface of the work rolls of the adjacent mill stand. By applying tensile loads to this rod, different interstand tension can be simulated and used to check the corresponding measuring devices on the mill stands.
Inventors
- 👤 Charles Roger Skelton
- 👤 Joseph William Marshall
- 👤 Roy Ronald Oxlade
- 👤 Keith Cyril Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:52
CPC Classifications
G; G01; G01M; G01M99/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
88 words
Apparatus for testing characteristics of a rolling mill stand which in use has two work rolls, said apparatus including two rigid members pivotally mounted to one another, each member having locating means adapted to locate the member on a respective work roll mounting means, each locating means being spaced from the pivotal mounting, means for applying a load between said rigid members, which load when the apparatus is in use is transmitted to the rolling mill stand through said rigid members, and means for measuring said applied load.
Claim 2
Dependent Claim
88 words
Apparatus for testing characteristics of a rolling mill stand which in use has two work rolls, said apparatus including two rigid members pivotally mounted to one another, each member having locating means adapted to locate the member on a respective work roll mounting means, each locating means being spaced from the pivotal mounting, means for applying a load between said rigid members, which load when the apparatus is in use is transmitted to the rolling mill stand through said rigid members, and means for measuring said applied load.
Claim 3
Dependent Claim
37 words
Apparatus as claimed in claim 1 including means for measuring the separation of a predetermined point on one rigid member from a predetermined point on the other rigid member in response to the application of said load.
Claim 4
Dependent Claim
14 words
Apparatus as claimed in claim 1 including means for cyclically varying said applied load.
Claim 5
Dependent Claim
18 words
Apparatus as claimed in claim 3 including means for varying said applied load between upper and lower limits.
Claim 6
Dependent Claim
32 words
Apparatus as claimed in claim 1 including resilient means mounted between one rigid member and the load applying means which resilient means in use simulates the resistance and stiffness of mill feed-stock.
Claim 7
Dependent Claim
23 words
Apparatus as claimed in claim 1 in which the rigid members are adapted to be rigidly located on respective work roll securing bolts.
Claim 8
Dependent Claim
24 words
Apparatus as claimed in claim 1 including means for measuring the relative separation of respective work roll drive shafts of the rolling mill stand.
Claim 9
Dependent Claim
19 words
Apparatus as claimed in claim 1 in which the load applying means includes an hydraulically operable cylinder and piston.
Claim 10
Dependent Claim
74 words
Apparatus as claimed in claim 1 for use with a pair of rolling mill stands, including a loading device connected with said pivotal mounting, said loading device being attached to an elongate member adapted to be passed between the work rolls of the second of the pair of rolling mill stands and means for reacting the load applied in use by the loading device against the work rolls of the second rolling mill stand.
Claim 11
Dependent Claim
38 words
Apparatus as claimed in claim 9 in which the means for reacting the load against the work rolls of the second rolling mill stand includes free-running rollers adapted to run on the circumferential surface of said work rolls.
Claim 12
Dependent Claim
26 words
Apparatus as claimed in claim 10 in which the free-running rollers have a peripheral surface which is of softer material than that of the work rolls.
Claim 13
Dependent Claim
21 words
Apparatus as claimed in claim 9 in which the loading device is connected with the pivotal mounting by a link member.
Claim 14
Independent Claim
58 words
A method of testing characteristics of a rolling mill stand which has two work rolls, said method including applying a load between two rigid members pivotally mounted to one another and each located on a respective work roll mounting means, measuring the applied load, and recording characteristics of the rolling mill stand during the application of said load.
Claim 15
Independent Claim
58 words
A method of testing characteristics of a rolling mill stand which has two work rolls, said method including applying a load between two rigid members pivotally mounted to one another and each located on a respective work roll mounting means, measuring the applied load, and recording characteristics of the rolling mill stand during the application of said load.
Claim 16
Dependent Claim
21 words
A method as claimed in claim 13 in which the applied load is cyclically varied between preset upper and lower limits.
Claim 17
Dependent Claim
18 words
A method as claimed in claim 13 including determining the separation of the respective work roll drive shafts.
Claim 18
Dependent Claim
95 words
Apparatus for testing the characteristics of a rolling mill stand which in use has two work rolls, said apparatus including an elongate member adapted to be passed between the work rolls of the rolling mill stand, mounting means connected with one end of the member and adapted to be held to the frame of the stand, means for applying a longitudinally directed tensile load to said elongate member, means for measuring said applied load, and means rigidly connected to the other end of said elongate member for reacting said applied load againsT said work rolls.
Claim 19
Dependent Claim
95 words
Apparatus for testing the characteristics of a rolling mill stand which in use has two work rolls, said apparatus including an elongate member adapted to be passed between the work rolls of the rolling mill stand, mounting means connected with one end of the member and adapted to be held to the frame of the stand, means for applying a longitudinally directed tensile load to said elongate member, means for measuring said applied load, and means rigidly connected to the other end of said elongate member for reacting said applied load againsT said work rolls.
Claim 20
Dependent Claim
26 words
Apparatus as claimed in claim 16 in which the means for applying the load to the elongate member includes a hydraulically actuated cylinder and piston arrangement.
Claim 21
Dependent Claim
31 words
Apparatus as claimed in claim 16 including a position transducer connected to the load applying means and adapted to measure the extension of the elongate member as it stretches under load.
Claim 22
Dependent Claim
110 words
Apparatus for testing the characteristics of a pair of adjacent rolling mill stands each of which has two work rolls, said apparatus including an elongate member adapted to be passed between the work rolls of both rolling mill stands, mounting means connected with one end of the elongate member and adapted to be held to the frame of one of said pair of stands, means for applying a longitudinally directed tensile load to said elongate member, means for measuring said applied load, and means connected to the other end of said elongate member for reacting said applied load against the work rolls of the second of said pair of stands.
Claim 23
Dependent Claim
110 words
Apparatus for testing the characteristics of a pair of adjacent rolling mill stands each of which has two work rolls, said apparatus including an elongate member adapted to be passed between the work rolls of both rolling mill stands, mounting means connected with one end of the elongate member and adapted to be held to the frame of one of said pair of stands, means for applying a longitudinally directed tensile load to said elongate member, means for measuring said applied load, and means connected to the other end of said elongate member for reacting said applied load against the work rolls of the second of said pair of stands.
References Cited (Backward Citations)
US2032584A
Cited
US3439535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |