US3613426A - Hot reversing strip mill method and apparatus - Google Patents
Hot reversing strip mill method and apparatus Download PDFInfo
- Publication number
- US3613426A US3613426A US866214A US3613426DA US3613426A US 3613426 A US3613426 A US 3613426A US 866214 A US866214 A US 866214A US 3613426D A US3613426D A US 3613426DA US 3613426 A US3613426 A US 3613426A
- Authority
- US
- United States
- Prior art keywords
- mill
- strip
- rolls
- furnace
- roughing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
- B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
- B21B31/103—Manipulators or carriages therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
- B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
- B21B1/34—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
Definitions
- the disclosure of this application relates to a rolling mill and, more particularly, to a hot metallic strip re versing mill of the type known as a Steckel Mill.
- a 4-high mill on either side of which there are located coiling furnaces and reels for receiving the strip as it is passed to and from the mill.
- the mill is also provided with a quick roll changing device in which connection the novel method is disclosed for employing the furnace to hold the strip in the furnace while the work rolls are being changed from a roughing set to a finishing set of work rolls.
- Present-day mills of the Steckel type usually employ a roughing mill where the carbon or stainless steel slab is reduced to a thickness of approximately of an inch and then is sent to a separate finishing mill having coilers and reels at either side for receiving the strip and preventing it from cooling during the rolling process.
- the capital expense of such an arrangement is substantially high even though the type of mill described is usually designed to meet a low economy operation.
- the present invention provides a novel method and apparatus for operating a Steckel type mill in which only one mill stand is employed which serves both the function of the roughing stand and the finishing stand of the previous arrangement.
- This method and apparatus comprise the employment of a set of work rolls designed to perform the roughing passes on a workpiece fed to and from the mill, the employment of coilers for coiling the reduced workpiece in one of two furnaces and holding it in the furnace while the roughing work rolls are rapidly removed and replaced by finishing work rolls by a quick roll changing device, after which the workpiece is uncoiled from the furnace and the finish passing is performed by the finishing work rolls, during which time the furnaces may again be employed to hold the heat in the workpiece.
- FIG. 1 is an elevational view of a mill arrangement for carrying out the present method and incorporating the novel apparatus
- FIG. 2 is a partial plan view of the apparatus shown in FIG. 1.
- a rolling mill 10 which includes a pair of spaced-apart housings 11 and 12, each housing receiving a mill screw 13 which is rotated by a drive arrangement 14, the screws 13 engaging upper backup chocks 15 which rotatably support a backup roll 16 received in the housings 11 and 12.
- a similar backup roll chock 17 is provided which rotatably supports a lower backup roll 18.
- Each backup roll is adapted to support upper and lower work rolls 19 and 21 which are received in bearing chocks 22 and 23, respectively, As will be 3,613,426 Patented Oct.
- a furnace 26 which may follow a number of well-known designs.
- the furnaces which are identified each comprise an outer frame 27, an inner refractory chamber 28 onto which there is mounted a rotatable reel 29 which is adapted to receive through a slot 31 the front end of a strip for winding the strip around the reel. Since both sides of the mill are identical with respect to the coiler assembly, from this point on only the side at the left of the mill illustrated in FIG. 1 will be described.
- the coiler arrangement also comprises a tailing roll 32 which is pivotally mounted on the stand 33 and pivoted by a linkage-cylinder arangement 34.
- a tiltable apron 35 which is pivoted at 36, which actually is coincident with the lower pinch roll 37.
- the apron which serves as part of the horizontal table, in one position is pivoted to a raised position to serve as a holding roller for the reel by the means of a linkage-cylinder arrangement 38.
- the pinch roll 37 cooperates with an upper pinch roll 39 which is received in a pinch roll frame 41, the upper roll being adapted to be raised and lowered through a piston cylinder assembly 42.
- the pinch roll frame 41 also carries a horizontally arranged stripper knife 43 which is carried in a guide 44 mounted on a pinch roll and actuated by a piston cylinder assembly 45. Between the pinch roll and mill there is provided a roller table 46.
- a side-shifting roll changing rig mechanism 47 which mechanism consists of two pairs of transverse extending tracks 48 and 49 which are arranged in a parallel relationship and serve as two side-by-side supporting areas for receiving two pairs of interrelated or nested work rolls, one pair being shown in FIG. 2.
- the tracks are adapted to be moved so as to line up with the windows of the mill so that the tracks 48 can receive a set of work rolls from the mill, for example, the roughing rolls, while the other set of tracks supports a second set of rolls and can be positioned in front of the windows once the first set of rolls is shifted.
- This side shifting is performed by means of a third pair of tracks 51 and 52 over which an upper platform 53 of a shifting car that carries the tracks 48 and 49 rides and is moved by a piston cylinder assembly 54.
- a piston cylinder assembly 55 having a pusher ram 56 adapted to engage the work roll chocks while in the mill and exert a force through operation of the cylinder to eject them from the mill onto the waiting pair of tracks 48. Reverse operation of the piston cylinder assembly 55 will transport a replacement pair of rolls from the roll changing rig to the mill after the pusher ram 56 is caused to engage the chocks of the new set of rolls.
- a stainless steel slab is to be received from the left of the mill illustrated in FIG. 1, in which connection it will be noted that the mill is set up with a set of roughing work rolls 19 and 21, preferably of a steel composition.
- the slab measuring 6" x 52" x 20 having a temperature of approximately 2200 F., is advanced over the roller table 46 into the mill 10 and issues therefrom to the right-hand side of the mill. After a given number of reverse passes, say, for example, seven to nine, the slab is reduced without being coiled to a thickness of approximately of an inch.
- the strip having a temperature of approximately 1900 F. is coiled in the furnace as it leaves the mill 28, the furnace temperature being of the order of 1900 to 1950 F.
- the pinch roll 39 is lowered by the cylinder 42 so as to grip the strip at the same time the cylinder 38 is operated to raise the lifting table 35, thereby conveying the leading end of the strip into the slot 31 of the reel 29 and upon the rotation of the reel, the remainder of the strip is wound on the periphery of the reel.
- the tailing roll 32 is brought into engagement with the outer periphery of the coil to hold the end tight against the body at the same time the outer convolution is engaged by the upper roller of the lifting table 35.
- the roughing mill work rolls are quickly retracted from the mill by virtue of the piston cylinder assembly 55 onto the pair of tracks 48.
- the cylinder 54 is operated to shift the roughing work rolls out from in front of the mill and to position the finishing work rolls, which preferably are of an iron composition, in the position for engagement by the rams 56.
- operation of the cylinder 55 brings the new rolls into the mill stand.
- the operation of changing the rolls is designed to take approximately three minutes.
- the roll 29 is rotated very slowly clockwise so that when the strip is to be re-fed to the mill the rotation of the reel reversed and the stripper 42 is brought into engagement with the leading end of the strip to peel it away from the body and send it onto the tilting table 35, which has been lowered to a horizontal position.
- the roller 32 is being driven at a slightly higher speed which tends to hold the coil tight and drive the strip on the guideway and through the open pinch rolls 37 and 39, after which the upper roll 34 is brought into engagement with the strip to urge it into the mill.
- the tailing roll 32 is lowered out of position and the speed of the reel 29 is raised to uncoil the strip.
- the furnace 27 on the other side of the mill will receive the strip after the first finishing pass, and the operation is continued until between two to four finishing passes are taken on the strip, the temperature of which will be approximately 1550 to 1600 F.
- the present invention allows one to obtain the best possible finish for the strip by using a different set of rolls for the finishing passes than is employed for the roughing passes.
- the employment of the furnace as a holding furnace in construction and the quick roll changing rig which allows the roughing work rolls to be removed and replaced by a finishing set of work rolls, all within a very short time (on the order of three to five minutes) and without any detrimental effect, presents an arrangement that gives maximum production at a considerable reduction in capital expense.
- a pinch roll unit arranged between said one furnace and said mill for advancing the workpiece from said mill to said furnace and from said furnace to said mill.
- one of said strip coilers include driving means for effecting the coiling and uncoiling of the strip.
- said driving means includes a means for causing said coiler to slowly rotate a coil during the period when said rolls are being changed.
Abstract
ROLLS ARE BEING CHANGED FROM A ROUGHING SET TO A FINSIHING SET OF WORK ROLLS.
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB52101/68A GB1269648A (en) | 1968-11-04 | 1968-11-04 | Hot reversing strip mill method and apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US3613426A true US3613426A (en) | 1971-10-19 |
Family
ID=10462650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US866214A Expired - Lifetime US3613426A (en) | 1968-11-04 | 1969-10-14 | Hot reversing strip mill method and apparatus |
Country Status (2)
Country | Link |
---|---|
US (1) | US3613426A (en) |
GB (1) | GB1269648A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4182146A (en) * | 1976-01-10 | 1980-01-08 | Hoesch Werke Aktiengesellschaft | Hot rolling mill |
EP0035077A1 (en) * | 1980-03-04 | 1981-09-09 | DAVY McKEE (SHEFFIELD) LIMITED | Rolling method and apparatus |
US4442690A (en) * | 1981-08-24 | 1984-04-17 | Voest-Alpine Aktiengesellschaft | Coiler-furnace combination |
US4761983A (en) * | 1987-08-07 | 1988-08-09 | International Rolling Mill Consultants, Inc. | Method and apparatus for winding material on a drum |
US5269166A (en) * | 1992-01-30 | 1993-12-14 | Tippins Incorporated | Hot strip mill with coiling furnace having separable housing |
US5285670A (en) * | 1992-10-15 | 1994-02-15 | Tippins Incorporated | Pinch roll and shear combination |
US5499523A (en) * | 1993-10-19 | 1996-03-19 | Danieli United, Inc. | Method for producing metal strips having different thicknesses from a single slab |
WO2008040431A1 (en) * | 2006-10-02 | 2008-04-10 | Siemens Vai Metals Technologies Gmbh & Co | Coiler furnace |
US20100101293A1 (en) * | 2006-08-12 | 2010-04-29 | Karl Hoen | Coiling furnace |
DE102012201418A1 (en) | 2012-02-01 | 2013-08-01 | Sms Siemag Ag | Steckel mill |
EP2650390A1 (en) * | 2012-04-13 | 2013-10-16 | Siemens VAI Metals Technologies GmbH | Coiling furnace |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1095751A (en) * | 1978-10-03 | 1981-02-17 | George W. Tippins | Plate mill method and apparatus |
US5956990A (en) * | 1998-08-14 | 1999-09-28 | Danieli United | Apparatus and method for producing and handling superlarge coils of metal strip |
-
1968
- 1968-11-04 GB GB52101/68A patent/GB1269648A/en not_active Expired
-
1969
- 1969-10-14 US US866214A patent/US3613426A/en not_active Expired - Lifetime
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4182146A (en) * | 1976-01-10 | 1980-01-08 | Hoesch Werke Aktiengesellschaft | Hot rolling mill |
EP0035077A1 (en) * | 1980-03-04 | 1981-09-09 | DAVY McKEE (SHEFFIELD) LIMITED | Rolling method and apparatus |
US4442690A (en) * | 1981-08-24 | 1984-04-17 | Voest-Alpine Aktiengesellschaft | Coiler-furnace combination |
US4761983A (en) * | 1987-08-07 | 1988-08-09 | International Rolling Mill Consultants, Inc. | Method and apparatus for winding material on a drum |
US5269166A (en) * | 1992-01-30 | 1993-12-14 | Tippins Incorporated | Hot strip mill with coiling furnace having separable housing |
US5285670A (en) * | 1992-10-15 | 1994-02-15 | Tippins Incorporated | Pinch roll and shear combination |
EP0593398A1 (en) * | 1992-10-15 | 1994-04-20 | Tippins Incorporated | Pinch roll and shear combination |
US5499523A (en) * | 1993-10-19 | 1996-03-19 | Danieli United, Inc. | Method for producing metal strips having different thicknesses from a single slab |
US20100101293A1 (en) * | 2006-08-12 | 2010-04-29 | Karl Hoen | Coiling furnace |
WO2008040431A1 (en) * | 2006-10-02 | 2008-04-10 | Siemens Vai Metals Technologies Gmbh & Co | Coiler furnace |
US20090320544A1 (en) * | 2006-10-02 | 2009-12-31 | Siemens Vai Metals Tech Gmbh | Coiling furnace |
CN101522330B (en) * | 2006-10-02 | 2011-07-06 | 西门子Vai金属技术两合公司 | Coiler furnace |
US8256256B2 (en) * | 2006-10-02 | 2012-09-04 | Siemens Vai Metals Technologies Gmbh | Coiling furnace |
DE102012201418A1 (en) | 2012-02-01 | 2013-08-01 | Sms Siemag Ag | Steckel mill |
WO2013113809A1 (en) | 2012-02-01 | 2013-08-08 | Sms Siemag Ag | Steckel mill |
CN104159677A (en) * | 2012-02-01 | 2014-11-19 | 西马克·西马格公司 | Steckel mill |
EP2650390A1 (en) * | 2012-04-13 | 2013-10-16 | Siemens VAI Metals Technologies GmbH | Coiling furnace |
WO2013153012A1 (en) * | 2012-04-13 | 2013-10-17 | Siemens Vai Metals Technologies Gmbh | Coiling furnace |
Also Published As
Publication number | Publication date |
---|---|
GB1269648A (en) | 1972-04-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PITTSBURGH NATIONAL BANK Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP.OF OH;REEL/FRAME:004458/0765 Effective date: 19850610 |
|
AS | Assignment |
Owner name: PITTSBURGH NATIONAL BANK,PENNSYLVANIA Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307 Effective date: 19860630 Owner name: PITTSBURGH NATIONAL BANK Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307 Effective date: 19860630 |
|
AS | Assignment |
Owner name: WEAN UNITED, INC. Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:PITTSBURGH NATIONAL BANK;REEL/FRAME:004925/0218 Effective date: 19880509 |
|
AS | Assignment |
Owner name: UNITED ENGINEERING ROLLING MILLS, INC. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WEAN INCORPORATED;REEL/FRAME:004920/0256 Effective date: 19880610 |