Patent US127161A successfully refreshed from Google Patents.
Patent US4308739A successfully refreshed from Google Patents.
US4308739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for modernizing a hot strip mill
Assignee: Tippins Inc
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Filing: 1980-01-28
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Granted: 1982-01-05
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Expires: 2000-01-28
Abstract
Abstract Standard hot strip mills include a roughing train and a finishing train having a plurality of finishing stands F-1, F-2, F-3 . . . F-X. F-2 is eliminated from the finishing train and F-1 is converted into a reversing mill. Coiling furnaces are installed on either side of F-1 with the downstream coiling furnace replacing F-2. The resultant reversing mill and coiling furnaces are arranged so that a transfer bar is first reduced as it passes through F-1 in a forward direction and coiled in the downstream coiling furnace, then further reduced as it is passed in a reverse direction through F-1 to the upstream coiling furnace, then further reduced as it is passed the third time through F-1, and then further reduced to the final gauge as it passes successively through F-3 and the remainder of the finishing stands in the finishing train.
Inventors
- 👤 George W. Tippins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:40
CPC Classifications
B; B21; B21B; B21B1/00; B21B1/22; B21B1/24; B21B1/26; B21B1/30; B21B1/32; B21B1/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A method of increasing the productivity of a continuous or semi-continuous hot strip mill including a roughing train for converting a slab to a transfer bar on the order of two inches and a finishing train having a plurality of finishing stands, F-1, F-2, F-3 . . . F-X for converting the transfer bar to a hot rolled strip having a PIW in excess of 600 comprising: A. eliminating F-2 from the finishing train; B. converting F-1 to a reversing mill; C. installing in lieu of F-2 a first coiling furnace having a mandrel coiler therein arranged to receive and coil the transfer bar on a first pass through F-1 in a forward direction; and D. installing a second coiling furnace having a mandrel coiler therein upstream of F-1 and which is likewise arranged to receive and coil the transfer bar passing from the first coiling furnace through F-1 in a reverse direction in a second pass.
Claim 2
Independent Claim
157 words
A method of increasing the productivity of a continuous or semi-continuous hot strip mill including a roughing train for converting a slab to a transfer bar on the order of two inches and a finishing train having a plurality of finishing stands, F-1, F-2, F-3 . . . F-X for converting the transfer bar to a hot rolled strip having a PIW in excess of 600 comprising: A. eliminating F-2 from the finishing train; B. converting F-1 to a reversing mill; C. installing in lieu of F-2 a first coiling furnace having a mandrel coiler therein arranged to receive and coil the transfer bar on a first pass through F-1 in a forward direction; and D. installing a second coiling furnace having a mandrel coiler therein upstream of F-1 and which is likewise arranged to receive and coil the transfer bar passing from the first coiling furnace through F-1 in a reverse direction in a second pass.
Claim 3
Independent Claim
167 words
A method of increasing the productivity of a continuous or semi-continuous hot strip mill including a roughing train for converting a slab to a transfer bar and a finishing train having a plurality of finishing stands F-1, F-2, F-3 . . . F-X for converting the transfer bar to a hot rolled strip comprising: A. eliminating F-2 from the finishing train; B. converting F-1 to a reversing mill; C. installing in lieu of F-2 a first coiling furnace having a mandrel coiler therein arranged to receive and coil the transfer bar on a first pass through F-1 in a forward direction; D. installing a second coiling furnace having a mandrel coiler therein upstream of F-1 and which is likewise arranged to receive and coil the transfer bar passing from the first coiling furnace through F-1 in a reverse direction in a second pass; and E. operating F-1 so that the first and second pass is independent of the constraints of the speed cone for the finishing passes.
Claim 4
Independent Claim
167 words
A method of increasing the productivity of a continuous or semi-continuous hot strip mill including a roughing train for converting a slab to a transfer bar and a finishing train having a plurality of finishing stands F-1, F-2, F-3 . . . F-X for converting the transfer bar to a hot rolled strip comprising: A. eliminating F-2 from the finishing train; B. converting F-1 to a reversing mill; C. installing in lieu of F-2 a first coiling furnace having a mandrel coiler therein arranged to receive and coil the transfer bar on a first pass through F-1 in a forward direction; D. installing a second coiling furnace having a mandrel coiler therein upstream of F-1 and which is likewise arranged to receive and coil the transfer bar passing from the first coiling furnace through F-1 in a reverse direction in a second pass; and E. operating F-1 so that the first and second pass is independent of the constraints of the speed cone for the finishing passes.
Claim 5
Dependent Claim
18 words
The method of claim 2 wherein said first pass is on the order of 300 to 800 fpm.
Claim 6
Dependent Claim
22 words
The method of claim 2 including operating F-1 so the third pass through F-1 is within the constraints of the speed cone.
References Cited (Backward Citations)
US3803891A
Cited
JPS545785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |