US3765213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling mills
Assignee: British Iron and Steel Research Association BISRA
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Filing: 1971-11-22
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Granted: 1973-10-16
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Expires: 1991-11-22
Abstract
Abstract A rolling mill stand for rolling metal bars has two grooved work rolls. Only one of the work rolls is directly driven from the drive motor, the other work roll being driven by frictional engagement with the driven roll. The two work rolls are pressed together with a force greater than twice the rolling load to permit the rolling torque to be transmitted from the driven work roll to the other roll.
Inventors
- 👤 N Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:42
CPC Classifications
B; B21; B21B; B21B31/00; B21B31/02; B21B31/04; B21B35/00; B21B35/10; B21B2203/00; B21B2203/36; B21B31/16; B21B31/20; B21B31/22; B21B31/30
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
98 words
A rolling mill stand comprising two work rolls, at least one of the work rolls having one or more workpiece-engaging recesses disposed circumferentially around its surface, roll chocks for supporting each work roll at its ends, means for driving only one of the work rolls from a drive motor, and prestressing means for squeezing the surfaces of the two work rolls together into frictional engagement with each other, so that the rolling torque is transmitted from the driven work roll to the other work roll solely by friction between the mating said surfaces of the two work rolls.
Claim 2
Dependent Claim
98 words
A rolling mill stand comprising two work rolls, at least one of the work rolls having one or more workpiece-engaging recesses disposed circumferentially around its surface, roll chocks for supporting each work roll at its ends, means for driving only one of the work rolls from a drive motor, and prestressing means for squeezing the surfaces of the two work rolls together into frictional engagement with each other, so that the rolling torque is transmitted from the driven work roll to the other work roll solely by friction between the mating said surfaces of the two work rolls.
Claim 3
Dependent Claim
30 words
A rolling mill stand according to claim 1 in which the prestressing means is adapted to squeeze the work rolls together with a force greater than twice the rolling load.
Claim 4
Dependent Claim
32 words
A rolling mill stand according to claim 1 in which the ends of each work roll are held in roll chocks and a tension member presses the roll chocks towards one another.
Claim 5
Dependent Claim
11 words
A rolling mill stand according to claim 1 which is two-high.
Claim 6
Dependent Claim
114 words
A rolling mill stand which comprises two work rolls, at least one of the work rolls having one or more workpiece-engaging recesses disposed circumferentially around the surface of the roll, roll chocks for supporting each work roll at its ends, a spacer separating the roll chocks from one anoTher, means for driving only one of the work rolls from a drive motor, and prestressing means including a tension member for squeezing the surfaces of the two work rolls togehter into frictional engagement with each other, so that the rolling torque is transmitted from the driven work roll to the other work roll by friction between the mating said surfaces of the two work rolls.
Claim 7
Dependent Claim
114 words
A rolling mill stand which comprises two work rolls, at least one of the work rolls having one or more workpiece-engaging recesses disposed circumferentially around the surface of the roll, roll chocks for supporting each work roll at its ends, a spacer separating the roll chocks from one anoTher, means for driving only one of the work rolls from a drive motor, and prestressing means including a tension member for squeezing the surfaces of the two work rolls togehter into frictional engagement with each other, so that the rolling torque is transmitted from the driven work roll to the other work roll by friction between the mating said surfaces of the two work rolls.
Claim 8
Dependent Claim
28 words
A rolling mill stand according to claim 5 in which an adjusting device is provided to the spacer to permit variation in the spacing between the roll chocks.
Claim 9
Dependent Claim
36 words
A rolling mill stand according to claim 6 in which the adjusting device includes a tie rod threaded at one end and a nut movable on said thread to adjust the spacing between the roll chocks.
Claim 10
Dependent Claim
68 words
A rolling mill stand according to claim 5 in which the surfaces of the spacer which bear against the roll chocks are curved as seen in a cross-section parallel to the plane of the roll axes, and the surfaces of the adjacent roll chocks have matching curvatures so that the roll chocks are permitted to rock in the plane containing the roll axes as the work rolls flex.
Claim 11
Dependent Claim
38 words
A rolling mill stand according to claim 5 in which resilient members are incorporated with the tension member so that any excessive loads on the mating surfaces of the work rolls can be absorbed by said resilient members.
Claim 12
Dependent Claim
16 words
A rolling mill stand according to claim 5 in which the spacer includes a wedge system.
Claim 13
Dependent Claim
103 words
A rolling mill stand comprising two work rolls, at least one of the work rolls having one or more workpiece-engaging recesses disposed circumferentially around its surface, roll chocks for supporting each work roll at its ends, means for driving only one of the work rolls from a driven motor, and a prestressing bolt passing through the roll chocks squeezing the surfaces of the two work rolls together into frictional engagement with each other, so that the rolling torque is transmitted from the driven work roll to the other work roll solely by friction between the mating said surfaces of the two work rolls.
Claim 14
Dependent Claim
103 words
A rolling mill stand comprising two work rolls, at least one of the work rolls having one or more workpiece-engaging recesses disposed circumferentially around its surface, roll chocks for supporting each work roll at its ends, means for driving only one of the work rolls from a driven motor, and a prestressing bolt passing through the roll chocks squeezing the surfaces of the two work rolls together into frictional engagement with each other, so that the rolling torque is transmitted from the driven work roll to the other work roll solely by friction between the mating said surfaces of the two work rolls.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |