EP2314391A2 - Aligning device for high aspect ratio slabs or plates - Google Patents

Aligning device for high aspect ratio slabs or plates Download PDF

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Publication number
EP2314391A2
EP2314391A2 EP10187027A EP10187027A EP2314391A2 EP 2314391 A2 EP2314391 A2 EP 2314391A2 EP 10187027 A EP10187027 A EP 10187027A EP 10187027 A EP10187027 A EP 10187027A EP 2314391 A2 EP2314391 A2 EP 2314391A2
Authority
EP
European Patent Office
Prior art keywords
work
work piece
roller table
rollers
rolling mill
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.)
Withdrawn
Application number
EP10187027A
Other languages
German (de)
French (fr)
Other versions
EP2314391A3 (en
Inventor
Nicholas Champion
Martyn Jones
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens PLC
Original Assignee
Siemens VAI Metals Technologies Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens VAI Metals Technologies Ltd filed Critical Siemens VAI Metals Technologies Ltd
Publication of EP2314391A2 publication Critical patent/EP2314391A2/en
Publication of EP2314391A3 publication Critical patent/EP2314391A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
    • 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
    • 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
    • B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
    • B21B2001/028—Slabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/12—End of product
    • B21B2273/14—Front end or leading end
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/22—Aligning on rolling axis, e.g. of roll calibers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/12—Arrangement or installation of roller tables in relation to a roll stand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/20—Revolving, turning-over, or like manipulation of work, e.g. revolving in trio stands

Definitions

  • the invention is concerned with rolling metal plates or slabs in plate mills.
  • the aspect ratio of the piece can be high, i.e. the width is much greater than the length. Because the piece is only supported on a few table rollers it is usually skewed as it enters the rolling stand work roll bite. This causes one leading corner of the piece to be rolled ahead of the other resulting in a non square plate.
  • This approach gives inconsistent results because the piece does not always fully align.
  • This method also requires that the work roll gap is reduced or closed, necessitating the need for additional set-up time to open the work roll gap to the correct setting for the rolling pass, resulting in reduced productivity. This method also has potential for damaging the work rolls.
  • a rolling mill comprises the features set out in claim 1 attached hereto.
  • the mechanical stop may be conveniently realised as a beam located above the roller table. The beam may be moved between positions by hydraulic cylinders.
  • the roller table comprises a first region having a plurality of transport rollers of constant diameter, hereafter referred to as the linear region, and a second region, hereafter referred to as the turntable region, having a plurality of tapered or stepped transport rollers with different diameter from a first end to a second end, alternate tapered or stepped transport rollers being arranged with their first ends at a first side of the roller table and a second side of the roller table respectively and further characterized in that the linear region extends from at least two roll pitches in front of the mechanical stop along the direction of transport up to the rolling mill.
  • the work piece 1 is first advanced along roller table 7 (comprising transport rollers 8a) against the work rolls 2 with the roll gap 3 being reduced or closed (the thick arrows indicate the direction of movement of the work piece). This causes the leading face 4 of the workpiece to align itself parallel with the surfaces of the work rolls.
  • the work piece 1 is then retracted from the work rolls 2 ( figure 1 c) and the roll gap 3 is opened before the work piece 1 is again advanced ( figure 1d ) to enter the roll gap 3 for rolling.
  • the invention comprises a mechanical stop mounted on the front of the rolling mill stand housing 5.
  • the stop is conveniently realised as a beam 6 mounted above and across the roller table 7 and having a face or edge 9 parallel to the axes of the work rollers 2 and serving as a datum for alignment of the workpiece 1.
  • the beam can be lowered into position or lifted clear via hydraulic cylinders. If the piece is to be aligned before entering the rolling mill work roll bite the beam is lowered into position and the piece is transported against face 9 to align it ( figs 2a - 2c ). Once the piece is aligned the beam is lifted clear. The piece is then transported to the work rolls 2 for the next rolling pass ( fig 2d ).
  • a conventional rolling mill effects turning of the work piece 1 by a turntable region 7b of the roller table 7.
  • the turntable region comprises a set of tapered or stepped transport rollers 8b arranged in an alternating pattern such that the first, third, fifth etc. rollers are arranged with their greatest diameter at one side of the table; and the second, fourth, sixth etc. rollers are arranged with their greatest diameter at the other side of the table.
  • Rotation of all tapered or stepped rollers 8b in the same direction causes a work piece to to move linearly along the roller table whereas rotating alternate tapered or stepped rollers in the opposite direction causes a work piece located thereon to rotate.
  • the roller table typically includes a linear region 7a comprising a few constant diameter rollers 8a, over which the work piece passes immediately before entering the work roll bite.
  • the work piece 1 is particularly susceptible to misalignment when located on the turntable region 7b.
  • the linear region 7a is extended ( Figure 4 ), making it easier to achieve alignment of the work piece against the beam 6 and to maintain this alignment from the mechanical stop up to the roll gap 3.
  • the invention is particularly concerned with work pieces having a high aspect ratio such that its width is greated than its length and the shortest work piece that can be handled is typically about two roller pitches in length. Hence the benefit of this feature is maximized where the length of the linear region 7a (in the direction orthogonal to the axes of the work rollers 2, see thick arrows) is such that it extends from at least two roller pitches in front of the beam 6 up to the work rolls 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
  • Metal Rolling (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)

Abstract

A rolling mill is disclosed having means for aligning a work piece (1) with the work rollers (2). A beam (6) having a face or edge providing an alignment datum is introduced to the path of the work piece (1) which is contacted with, and pushed against the face by the roller table. After the work piece (1) is alligned, the beam (6) is raised and the work piece (1) proceeds to the working rollers (2).

Description

  • The invention is concerned with rolling metal plates or slabs in plate mills.
  • When turning a slab prior to the first pass in a rolling stand or a plate in early passes, the aspect ratio of the piece can be high, i.e. the width is much greater than the length. Because the piece is only supported on a few table rollers it is usually skewed as it enters the rolling stand work roll bite. This causes one leading corner of the piece to be rolled ahead of the other resulting in a non square plate.
  • This problem has been addressed by a number of approaches in the prior art. In some instances the piece has been run into the faces of the work rolls, using the roller table, in an attempt to align the piece prior to rolling. The piece is then backed away a short distance before reversing and entering the work roll bite for rolling. This has been controlled by the rolling stand automation system.
  • This approach gives inconsistent results because the piece does not always fully align. This method also requires that the work roll gap is reduced or closed, necessitating the need for additional set-up time to open the work roll gap to the correct setting for the rolling pass, resulting in reduced productivity. This method also has potential for damaging the work rolls.
  • There remains a need for a reliable means for aligning slabs or plates, particularly those having a high aspect ratio, prior to entry of the rolling stand work bite.
  • According to the invention, a rolling mill comprises the features set out in claim 1 attached hereto. The mechanical stop may be conveniently realised as a beam located above the roller table. The beam may be moved between positions by hydraulic cylinders.
  • In a preferred embodiment, the roller table comprises a first region having a plurality of transport rollers of constant diameter, hereafter referred to as the linear region, and a second region, hereafter referred to as the turntable region, having a plurality of tapered or stepped transport rollers with different diameter from a first end to a second end, alternate tapered or stepped transport rollers being arranged with their first ends at a first side of the roller table and a second side of the roller table respectively and further characterized in that the linear region extends from at least two roll pitches in front of the mechanical stop along the direction of transport up to the rolling mill.
  • The invention will now be described, by non-limiting example, with reference to the attached figures in which:
    • Figure 1 illustrates the process of alligning a work piece in a rolling mill according to the prior art;
    • Figure 2 illustrates the allignment process using the method and apparatus of the present invention;
    • Figure 3 illustrates a rolling mill having a roller table comprising a turntable region and a linear region according to the prior art and
    • Figure 4 illustrates a rolling mill having a roller table comprising a turntable region and a linear region according to the invention.
  • Referring to figures 1 a and 1 b, in a rolling mill according to the prior art, the work piece 1 is first advanced along roller table 7 (comprising transport rollers 8a) against the work rolls 2 with the roll gap 3 being reduced or closed (the thick arrows indicate the direction of movement of the work piece). This causes the leading face 4 of the workpiece to align itself parallel with the surfaces of the work rolls.
    The work piece 1 is then retracted from the work rolls 2 (figure 1 c) and the roll gap 3 is opened before the work piece 1 is again advanced (figure 1d) to enter the roll gap 3 for rolling.
  • Referring to figure 2, the invention comprises a mechanical stop mounted on the front of the rolling mill stand housing 5. By way of example, the stop is conveniently realised as a beam 6 mounted above and across the roller table 7 and having a face or edge 9 parallel to the axes of the work rollers 2 and serving as a datum for alignment of the workpiece 1. The beam can be lowered into position or lifted clear via hydraulic cylinders. If the piece is to be aligned before entering the rolling mill work roll bite the beam is lowered into position and the piece is transported against face 9 to align it (figs 2a - 2c). Once the piece is aligned the beam is lifted clear. The piece is then transported to the work rolls 2 for the next rolling pass (fig 2d).
  • Referring to figure 3, a conventional rolling mill effects turning of the work piece 1 by a turntable region 7b of the roller table 7. The turntable region comprises a set of tapered or stepped transport rollers 8b arranged in an alternating pattern such that the first, third, fifth etc. rollers are arranged with their greatest diameter at one side of the table; and the second, fourth, sixth etc. rollers are arranged with their greatest diameter at the other side of the table.
  • Rotation of all tapered or stepped rollers 8b in the same direction causes a work piece to to move linearly along the roller table whereas rotating alternate tapered or stepped rollers in the opposite direction causes a work piece located thereon to rotate.
  • The roller table typically includes a linear region 7a comprising a few constant diameter rollers 8a, over which the work piece passes immediately before entering the work roll bite.
  • The work piece 1 is particularly susceptible to misalignment when located on the turntable region 7b. Hence, in a preferred embodiment of the invention the linear region 7a is extended (Figure 4), making it easier to achieve alignment of the work piece against the beam 6 and to maintain this alignment from the mechanical stop up to the roll gap 3. The invention is particularly concerned with work pieces having a high aspect ratio such that its width is greated than its length and the shortest work piece that can be handled is typically about two roller pitches in length. Hence the benefit of this feature is maximized where the length of the linear region 7a (in the direction orthogonal to the axes of the work rollers 2, see thick arrows) is such that it extends from at least two roller pitches in front of the beam 6 up to the work rolls 2.

Claims (5)

  1. A rolling mill comprising:
    a roller table having a plurality of transport rollers, operable to transport a work piece to a pair of cooperating work rollers,
    characterised by a mechanical stop having a face or edge parallel with the rotational axes of the work rollers, the stop being moveable between a first position in the path of a work piece being transported to the work rollers and a second position clear of said path.
  2. A rolling mill according to claim 1, where the mechanical stop is realised as a beam located above the roller table.
  3. A rolling mill according to claim 2, where the beam is moveable between the first and second positions by operation of hydraulic cylinders.
  4. A rolling mill according to claim 1, 2 or 3, wherein the roller table comprises a first region having a plurality of transport rollers of constant diameter and a second region having a plurality of tapered or stepped transport rollers with different diameter from a first end to a second end, alternate tapered or stepped transport rollers being arranged with their first ends at a first side of the roller table and a second side of the roller table respectively and further characterized in that the first region extends along the direction of transport from at least two roller pitches in front of the mechanical stop up the work rollers.
  5. A method of rolling a work piece on a rolling mill comprising:
    introducing a mechanical stop, having a face or edge providing an alignment datum, to a path of the work piece along a roller table to work rolls;
    transporting the work piece, via the roller table, and driving the work piece against the face to effect allignment therewith;
    raising the mechanincal stop clear of the path of the work piece and
    transporting the work piece to the work rolls.
EP10187027.7A 2009-10-19 2010-10-08 Aligning device for high aspect ratio slabs or plates Withdrawn EP2314391A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0918206A GB2474497B (en) 2009-10-19 2009-10-19 Aligning device for high aspect ratio slabs or plates

Publications (2)

Publication Number Publication Date
EP2314391A2 true EP2314391A2 (en) 2011-04-27
EP2314391A3 EP2314391A3 (en) 2013-10-16

Family

ID=41462500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10187027.7A Withdrawn EP2314391A3 (en) 2009-10-19 2010-10-08 Aligning device for high aspect ratio slabs or plates

Country Status (8)

Country Link
US (1) US20110088445A1 (en)
EP (1) EP2314391A3 (en)
JP (1) JP2011083824A (en)
KR (1) KR20110043482A (en)
CN (1) CN102039321A (en)
BR (1) BRPI1003811A2 (en)
GB (1) GB2474497B (en)
RU (1) RU2010142550A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101320119B1 (en) * 2011-09-29 2013-10-18 현대제철 주식회사 Transferring apparatus for rolling mill
DE102012224505A1 (en) * 2012-12-28 2014-07-03 Sms Siemag Aktiengesellschaft Apparatus and method for laterally guiding a rolled or cast product on a transport line
CN105834231B (en) * 2016-05-05 2018-01-26 重庆钢铁集团设计院有限公司 A kind of steel plate roller-way conveys turning method of adjustment
CN105921552B (en) * 2016-05-05 2018-01-26 重庆钢铁集团设计院有限公司 A kind of rolled plate spray printing induction system
CN110883091A (en) * 2019-11-18 2020-03-17 张家港宏昌钢板有限公司 Operation method for effectively controlling oblique angle of rolled large plate

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1342220A (en) * 1918-12-23 1920-06-01 Harry A Lewis Roller-table
US1932504A (en) * 1931-08-06 1933-10-31 United Eng Foundry Co Machine for pressing slabs for rolling
US1989532A (en) * 1933-08-29 1935-01-29 United Eng Foundry Co Method and apparatus for hot rolling strip
US2165917A (en) * 1938-03-19 1939-07-11 Robertson Co H H Method and apparatus for producing steel sheets
US2401592A (en) * 1943-12-28 1946-06-04 Aluminum Co Of America Work handling apparatus
US3144139A (en) * 1961-08-09 1964-08-11 Burns & Roe Inc Billet handling apparatus
US3260346A (en) * 1962-12-28 1966-07-12 United Eng Foundry Co Method of and apparatus for handling workpieces
BE756498A (en) * 1970-01-20 1971-03-01 Bwg Bergwerk Und Walzwerkmasch BRAMES COOLING DEVICE
FR2081950B1 (en) * 1970-03-14 1974-09-06 Eumuco Ag Fuer Maschinenbau
US3829072A (en) * 1972-11-13 1974-08-13 A Fieser Metal slab conditioning system
US3837559A (en) * 1973-03-22 1974-09-24 Wean United Inc Strip joining apparatus for rolling mills and the like
US3921429A (en) * 1974-04-11 1975-11-25 Tadeusz Sendzimir Process and apparatus for modifying the cross section of a slab
US4587823A (en) * 1982-12-08 1986-05-13 Blaw-Knox Corporation Apparatus and method for press-edging hot slabs
GB2203372A (en) * 1987-04-15 1988-10-19 British Steel Corp Heat conservation of hot metal slabs
DE3838764A1 (en) * 1988-11-16 1990-05-17 Schloemann Siemag Ag DEVICE FOR ON OR EXECUTION OF ROLLED GOODS, IN PARTICULAR FORM STEEL BETWEEN THE ROLLS OF ROLLING DEVICES
GB8914012D0 (en) * 1989-06-19 1989-08-09 Davy Mckee Sheffield Taper rolling-direct length measurement
US5012915A (en) * 1990-02-15 1991-05-07 H.G. Weber & Co., Inc. Method and apparatus for rotating an item
EP0838555A4 (en) * 1995-07-06 1999-09-29 Komatsu Mfg Co Ltd Hydraulic roller-compactor
IT1296715B1 (en) * 1997-11-11 1999-07-15 Danieli Off Mecc PROCEDURE FOR CHECKING THE AXIALITY FOR OUTGOING SHEETS FROM CONTINUOUS CASTING AND RELATED DEVICE
DK1273522T3 (en) * 2001-07-03 2005-03-21 Ishida Europ Ltd distribution apparatus
US7228972B2 (en) * 2005-04-18 2007-06-12 Morgan Construction Company Short bar separation and recovery system and method
US7293639B2 (en) * 2006-03-03 2007-11-13 Vertique, Inc. Case rotating system
CN201172068Y (en) * 2008-04-15 2008-12-31 宝山钢铁股份有限公司 Hot-rolling production line carry-over table

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
JP2011083824A (en) 2011-04-28
US20110088445A1 (en) 2011-04-21
GB0918206D0 (en) 2009-12-02
KR20110043482A (en) 2011-04-27
CN102039321A (en) 2011-05-04
GB2474497B (en) 2011-09-07
BRPI1003811A2 (en) 2013-02-13
RU2010142550A (en) 2012-04-27
GB2474497A (en) 2011-04-20
EP2314391A3 (en) 2013-10-16

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