US3803891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for rolling hot metal workpieces
Assignee: Steel Company of Canada Ltd
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Filing: 1972-11-13
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Granted: 1974-04-16
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Expires: 1992-11-13
Abstract
Abstract The rolling of hot metal workpieces in a rolling mill including a reversing roughing mill stand, a finishing mill and a coiler located between the former two components is accomplished by rolling the workpiece in the roughing mill, on the third from last pass when the workpiece is between the roughing mill and the coiler rolling the workpiece to a length less than the spacing between the roughing mill and the coiler, on the last pass rolling the workpiece to a length greater than this spacing, coiling the workpiece in the coiler, uncoiling the workpiece from the coiler, delivering the workpiece to the finishing mill and rolling it in the finishing mill.
Inventors
- 👤 W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:17
CPC Classifications
B; B21; B21C; B21C47/00; B21C47/02; B21C47/08; B21B; B21B1/00; B21B1/22; B21B1/24; B21B1/26; B21C47/04; B21B15/00; B21B2015/0057
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
312 words
A method for processing hot metal workpieces in a rolling mill of the type that includes a first mill comprising a reversing mill stand, a second mill comprising at least one mill stand and coiler means located between said first and second mills for coiling a hot metal workpiece delivered thereto from said first mill before said hot metal workpiece is rolled in said second mill, said method comprising the following steps: a. delivering a hot metal workpiece to said first mill; b. rolling said hot metal workpiece in said first mill by passing said hot metal workpiece back and forth through said reversing mill stand in a series of passes from one side thereof to the other side thereof and vice-versa, on the third last pass of said hot metal workpiece through said reversing mill stand passing said hot metal workpiece from the side of said reversing mill stand further from said coiler means to the side thereof closer to said coiler means and rolling said hot metal workpiece to a length less than the spacing between said reversing mill stand and said coiler means without coiling said hot metal workpiece in said coiler means, on the last pass of said hot metal workpiece through said reversing mill stand again passing said hot metal workpiece from the side of said reversing mill stand further from said coiler means to the side thereof closer to said coiler means and rolling said hot metal workpiece to a length greater than the spacing between said reversing mill stand and said coiler means; c. coiling said hot metal workpiece from said first mill in said coiler means after said last pass; d. thereafter uncoiling said hot metal workpiece from said coiler means; e. subsequently delivering the said hot metal workpiece to said second mill; and f. rolling said hot metal workpiece in said second mill.
Claim 2
Independent Claim
312 words
A method for processing hot metal workpieces in a rolling mill of the type that includes a first mill comprising a reversing mill stand, a second mill comprising at least one mill stand and coiler means located between said first and second mills for coiling a hot metal workpiece delivered thereto from said first mill before said hot metal workpiece is rolled in said second mill, said method comprising the following steps: a. delivering a hot metal workpiece to said first mill; b. rolling said hot metal workpiece in said first mill by passing said hot metal workpiece back and forth through said reversing mill stand in a series of passes from one side thereof to the other side thereof and vice-versa, on the third last pass of said hot metal workpiece through said reversing mill stand passing said hot metal workpiece from the side of said reversing mill stand further from said coiler means to the side thereof closer to said coiler means and rolling said hot metal workpiece to a length less than the spacing between said reversing mill stand and said coiler means without coiling said hot metal workpiece in said coiler means, on the last pass of said hot metal workpiece through said reversing mill stand again passing said hot metal workpiece from the side of said reversing mill stand further from said coiler means to the side thereof closer to said coiler means and rolling said hot metal workpiece to a length greater than the spacing between said reversing mill stand and said coiler means; c. coiling said hot metal workpiece from said first mill in said coiler means after said last pass; d. thereafter uncoiling said hot metal workpiece from said coiler means; e. subsequently delivering the said hot metal workpiece to said second mill; and f. rolling said hot metal workpiece in said second mill.
Claim 3
Dependent Claim
56 words
A method according to claim 1 wherein said rolling mill includes a crop shear located between said coiler means and said second mill and wherein on said last pass through said reversing mill stand said hot metal workpiece is rolled to a length greater than the spacing between said reversing mill stand and said crop shear.
Claim 4
Dependent Claim
43 words
A method according to claim 1 wherein on said last pass through said reversing mill Stand said hot metal workpiece is rolled to a length greater than the spacing between said reversing mill stand and the first mill stand of said second mill.
Claim 5
Dependent Claim
45 words
A method according to claim 1 wherein said hot metal workpiece has a head end and a tail end, said hot metal workpiece being delivered to and coiled in said coiler means head end first but being delivered from said coiler means tail end first.
Claim 6
Dependent Claim
22 words
A method according to claim 1 wherein said first mill is a roughing mill and said second mill is a finishing mill.
Claim 7
Dependent Claim
30 words
A method according to claim 1 wherein said rolling mill is a hot strip mill and said hot metal workpiece delivered to said second mill is a hot metal strip.
Claim 8
Dependent Claim
86 words
A method according to claim 1 wherein said hot metal workpiece has a head end and a tail end, said hot metal workpiece being delivered to and coiled in said coiler means head end first but being delivered from said coiler means tail end first, wherein said first mill is a roughing mill and said second mill is a finishing mill and wherein said rolling mill is a hot strip mill and said hot metal workpiece delivered to said second mill is a hot metal strip.
Claim 9
Dependent Claim
13 words
A method according to claim 1 wherein said coiler is a mandrelless coiler.
Claim 10
Dependent Claim
14 words
A method according to claim 8 wherein said mandrelless coiler is a mandrelless downcoiler.
Claim 11
Dependent Claim
86 words
A method according to claim 9 wherein said hot metal workpiece has a head end and a tail end, said hot metal workpiece being delivered to and coiled in said coiler means head end first but being delivered from said coiler means tail end first, wherein said first mill is a roughing mill and said second mill is a finishing mill and wherein said rolling mill is a hot strip mill and said hot metal workpiece delivered to said second mill is a hot metal strip.
Claim 12
Dependent Claim
39 words
A method according to claim 1 wherein said hot metal workpiece is uncoiled substantially immediately after coiling, whereby said hot metal workpiece is substantially continuously in motion from the commencement of coiling thereof to the termination of uncoiling thereof.
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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |