US3597954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for rolling steel material and rails or similarly shaped products
Assignee: Nippon Steel Corp
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Filing: 1969-01-13
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Granted: 1971-08-10
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Expires: 1989-01-13
Abstract
Abstract A method and apparatus for rolling steel material into steel products having flanges such as rails and H-shaped products by use of a universal rolling mill wherein the cross section along the direction of axis of the vertical roll of the universal rolling mill has a convex shape. Therefore, the rolling by such vertical roll gives a reduction of nearly V-shaped concentration to the part of the steel material contacting said vertical roll and to be made into a flange.
Inventors
- 👤 Koe Nakajima
- 👤 Hisashi Naoi
- 👤 Kanichi Kishikawa
- 👤 Hidehiko Abe
- 👤 Kazunari Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:07
CPC Classifications
B; B21; B21B; B21B1/00; B21B1/08; B21B1/085
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
169 words
In a method for rolling by the universal rolling mill steel material into shaped steel products having flanges such as rails and H-shaped articles, the improvement comprising subjecting the part of said material to be made into a flange to a first rolling operation by a first vertical roll concentration of reduction force to the center of said part while preventing substantial restriction of extension of said part in the width direction thereof, thereby preventing the formation of an unforged zone of said part; subjecting said part to a second rolling operation by a second vertical roll of said universal rolling mill including imparting a smoothing reduction force to said part while increasing the restriction of extension of said part in the width direction thereof; and subjecting said part to a third rolling operation by a third vertical roll of said universal rolling mill including imparting a further smoothing reduction force to said part while further increasing the restriction of extension of said part in the width direction thereof.
Claim 2
Dependent Claim
169 words
In a method for rolling by the universal rolling mill steel material into shaped steel products having flanges such as rails and H-shaped articles, the improvement comprising subjecting the part of said material to be made into a flange to a first rolling operation by a first vertical roll concentration of reduction force to the center of said part while preventing substantial restriction of extension of said part in the width direction thereof, thereby preventing the formation of an unforged zone of said part; subjecting said part to a second rolling operation by a second vertical roll of said universal rolling mill including imparting a smoothing reduction force to said part while increasing the restriction of extension of said part in the width direction thereof; and subjecting said part to a third rolling operation by a third vertical roll of said universal rolling mill including imparting a further smoothing reduction force to said part while further increasing the restriction of extension of said part in the width direction thereof.
Claim 3
Dependent Claim
120 words
In a universal rolling mill for rolling steel material into shaped steel products having flanges such as rails and H-shaped articles, the improvement comprising a first vertical roll adapted to contact that part of said material to be made into a flange, said first vertical roll having a convex portion around the periphEry thereof adapted to impart a concentrated V-shaped reduction force to the center of said part, and concave portions on either side of said convex portion, the outward extensions of said concave portions forming curves having a lower rate of curvature than the corners of said part when finished, said curves adapted to prevent substantial restriction of extension of said part in the direction of the width thereof.
Claim 4
Dependent Claim
120 words
In a universal rolling mill for rolling steel material into shaped steel products having flanges such as rails and H-shaped articles, the improvement comprising a first vertical roll adapted to contact that part of said material to be made into a flange, said first vertical roll having a convex portion around the periphEry thereof adapted to impart a concentrated V-shaped reduction force to the center of said part, and concave portions on either side of said convex portion, the outward extensions of said concave portions forming curves having a lower rate of curvature than the corners of said part when finished, said curves adapted to prevent substantial restriction of extension of said part in the direction of the width thereof.
Claim 5
Dependent Claim
46 words
In a universal rolling mill as claimed in claim 2 the further improvement comprising a second vertical roll adapted to contact said part, said second vertical roll having curves similar to but having a higher rate of curvature than said curves of said first vertical roll.
Claim 6
Dependent Claim
46 words
In a universal rolling mill as claimed in claim 3, the further improvement comprising a third vertical roll adapted to contact said part, said third vertical roll having curves similar to but having a higher rate of curvature than said curves of said second vertical roll.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |