US3747387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll changing arrangement for a rolling mill
Assignee: United Engineering Inc
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Filing: 1972-03-27
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Granted: 1973-07-24
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Expires: 1992-03-27
Abstract
Abstract The disclosure of this invention relates to a rolling mill wherein the chocks of the work roll on the drive side of the mill are split to enable the work rolls to be removed and replaced while strip is still being passed between the rolls. The chocks of the work rolls on the operating side are nested. The work roll chocks are provided with wheels which, during the roll changing operation, are carried by a pair of upper tracks secured to the housings and chocks of the upper backup roll and by a pair of lower tracks carried only by the housings. A lower track runs past the front of the mill to a side shifting unit having tracks which serve as continuations of the lower tracks and which receive the wheels of the chocks of the operating side work roll and the wheels of the chock of the lower drive side work roll as the rolls are brought to and from the mill to transfer them from and to the side shifter. The wheels of the chock of the upper drive side work roll are held apart after the drive side chocks leave the mill by a plunger displaced by a cam and cam track. In an attempt to improve the productivity of rolling mills, and particularly high-speed tandem cold mills, much effort in recent years has been given to developing a system that would allow the work rolls of one or more stands to be changed while a strip is still passing through these stands and is being rolled by the other stands of the mill.
Inventors
- 👤 C Shumaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:16
CPC Classifications
B; B21; B21B; B21B31/00; B21B31/08; B21B31/10; B21B13/00; B21B2013/003
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
192 words
In a rolling mill comprising: a housing, a pair of working rolls arranged on the opposite sides of the passline of said mill and each having a drive side bearing chock and an operating side bearing chock received in said housing, said bearing chocks at the respective ends of said working rolls being arranged to form cooperative pairs of bearing chocks, said cooperative pairs of bearing chocks at the drive side being split in a manner that the adjacent surfaces thereof can be spaced from said mill passline during roll changing, said cooperative pair of bearing chocks at the operating side being nested in a manner that one of the bearing chocks thereof is received and carried by the other bearing chock, and means for supporting said drive side bearing chocks to maintain them spaced from said mill passline when moved through said mill during roll changing, other means including a member movable in the direction of one of said drive side bearing chocks contained by said other drive side bearing chock for continuing said spaced supporting thereof when said drive side bearing chocks are out of said mill during roll changing.
Claim 2
Dependent Claim
192 words
In a rolling mill comprising: a housing, a pair of working rolls arranged on the opposite sides of the passline of said mill and each having a drive side bearing chock and an operating side bearing chock received in said housing, said bearing chocks at the respective ends of said working rolls being arranged to form cooperative pairs of bearing chocks, said cooperative pairs of bearing chocks at the drive side being split in a manner that the adjacent surfaces thereof can be spaced from said mill passline during roll changing, said cooperative pair of bearing chocks at the operating side being nested in a manner that one of the bearing chocks thereof is received and carried by the other bearing chock, and means for supporting said drive side bearing chocks to maintain them spaced from said mill passline when moved through said mill during roll changing, other means including a member movable in the direction of one of said drive side bearing chocks contained by said other drive side bearing chock for continuing said spaced supporting thereof when said drive side bearing chocks are out of said mill during roll changing.
Claim 3
Dependent Claim
132 words
A rolling mill comprising: a housing, a pair of working rolls arranged on the opposite sides of the passline of said mill and each having a drive side bearing chock and an operating side bearing chock received in the housing, the bearing chocks at the respective ends of the working rolls being arranged to form cooperative pairs of bearing chocks, means for supporting the drive side bearing chocks so as to maintain them spaced from said mill passline when moved through said mill during roll changing, and other means including a member movable in the direction of one of said drive side bearing chocks contained by the other drive side bearing chock for continuing the spaced supporting thereof when the drive side bearing chocks are out of the mill during roll changing.
Claim 4
Dependent Claim
132 words
A rolling mill comprising: a housing, a pair of working rolls arranged on the opposite sides of the passline of said mill and each having a drive side bearing chock and an operating side bearing chock received in the housing, the bearing chocks at the respective ends of the working rolls being arranged to form cooperative pairs of bearing chocks, means for supporting the drive side bearing chocks so as to maintain them spaced from said mill passline when moved through said mill during roll changing, and other means including a member movable in the direction of one of said drive side bearing chocks contained by the other drive side bearing chock for continuing the spaced supporting thereof when the drive side bearing chocks are out of the mill during roll changing.
Claim 5
Dependent Claim
66 words
In a rolling mill according to claim 2 wherein said movable member is carried by one of said drive side bearing chocks movable towards and away from said other drive side bearing chocks and arranged to engage said other drive side bearing chock, and means arranged to engage said member when said pair of drive side bearing chocks are out of said mill during roll changing.
Claim 6
Dependent Claim
82 words
In a rolling mill according to claim 3 wherein said member comprises a plunger arranged in the lower of said pair of driVe side bearing chocks displaceable vertically towards and away from the upper of said pair of drive side bparing chocks and adapted to engage said upper drive side bearing chock when displaced upwardly, and means arranged on one side and outside said mill for engaging said plunger when said drive side bearing chocks are outside said mill during roll changing.
Claim 7
Dependent Claim
30 words
In a rolling mill according to claim 4 wherein said means for engaging said plunger comprises a track, and a roller carried by said plunger arranged to engage said track.
Claim 8
Dependent Claim
65 words
In a rolling mill according to claim 5 wherein the end of said track adjacent said mill is sloped away from said plunger and said plunger is of a length sufficient to engage the slope portion of said track, and wherein said slope is sufficient to cause said plunger to rise a distance sufficient to continue said spaced supporting of said drive side bearing chocks.
Claim 9
Dependent Claim
179 words
A rolling mill according to claim 3 in which the first means includes a first pair of tracks arranged to suport the bearing chocks of the upper working roll and, in addition, includes a second pair of tracks arranged to support the drive side bearing chock of the upper roll, said second pair of tracks having sloped portions, said member comprising a pair of plungers to engage a different one of the sloped portions, a third pair of tracks arranged to support the bearing chocks of the lower roll, separate means carried by the upper and lower drive side bearing chocks for engaging in a supporting relationship said first and third pairs of tracks, respectively, for supporting the drive side bearing chocks in the spaced-apart condition when passing through said mill during roll changing, said third pair of tracks being arranged to overlap the slope portions in a manner that said uppermost drive side bearing chock is supportable by one or the other of the first and second pairs of tracks by means of said plungers and separate means.
Claim 10
Dependent Claim
24 words
In a rolling mill according to claim 7 wherein said slope portions and said plungers are transversely spaced from said third pair of tracks.
Claim 11
Dependent Claim
85 words
A rolling mill according to claim 2 in which the first means include a first pair of tracks having supporting surfaces, a second pair of tracks having supporting surfaces arranged on the same elevation as the supporting surfaces of the first pair of tracks and including sloped portions which are arranged to overlap portions of said first pair of tracks, and to assume a supporting relationship with said other means when the uppermost drive side bearing chock is not being supported by the first means.
Claim 12
Dependent Claim
102 words
A rolling mill according to claim 2 in which the first means include first track means, and means in the mill for supporting the first track means, the first track means being of a length sufficient to maintain the drive side bearing chocks spaced from the mill passline while the chocks are moved through the mill, second track means arranged to overlap a portion of the first track means and to be engaged by said other means in a manner to continue said spaced support for the uppermost drive side bearing chock when passing to and from the mill during roll changing.
References Cited (Backward Citations)
US3638467A
Cited
US3698226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |