EP0164265A2 - Verfahren zum Walzen einer Metallbramme - Google Patents

Verfahren zum Walzen einer Metallbramme Download PDF

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Publication number
EP0164265A2
EP0164265A2 EP85303980A EP85303980A EP0164265A2 EP 0164265 A2 EP0164265 A2 EP 0164265A2 EP 85303980 A EP85303980 A EP 85303980A EP 85303980 A EP85303980 A EP 85303980A EP 0164265 A2 EP0164265 A2 EP 0164265A2
Authority
EP
European Patent Office
Prior art keywords
slab
faces
width
pair
lateral edges
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Withdrawn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
EP85303980A
Other languages
English (en)
French (fr)
Other versions
EP0164265A3 (de
Inventor
Kenneth Thomas Lawson
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.)
Davy Mckee Sheffield Ltd
Original Assignee
Davy Mckee Sheffield 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 Davy Mckee Sheffield Ltd filed Critical Davy Mckee Sheffield Ltd
Publication of EP0164265A2 publication Critical patent/EP0164265A2/de
Publication of EP0164265A3 publication Critical patent/EP0164265A3/de
Withdrawn legal-status Critical Current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
    • 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
    • B21B1/026—Rolling

Definitions

  • the present invention relates to a method of rolling metal slab in order to increase the width thereof.
  • This stage also increases the width of the bloom and, finally, the bloom is rolled successively between pairs of cylindrical rolls in order to produce a flat of substantially uniform thickness. It will be appreciated, therefore, that, although initially a considerable reduction takes place over the central part of each of the two faces of the bloom, there is also a light reduction at the edges of the two faces.
  • a method of increasing the width of a metal slab comprises the steps of hot rolling a part, but not the lateral edges, of a pair of-opposite faces of the slab to form a groove in each of the faces and to increase the width of the slab; and to hot roll the slab including the said lateral edges of said faces to reduce the slab to substantially uniform thickness.
  • the lateral edges of the pair of opposite faces of the slab are not rolled while the grooves are formed in the slab and it is only subsequently that the lateral edges of the faces are rolled in order to reduce the slab to substantially uniform thickness.
  • the advantage of this method is that the rolls which are required-to produce the grooves do not have a surface which engages with the full width of the slab and the depth of the grooves so formed can be varied.
  • the amount of increase in slab width depends upon the depth of groove formed in the slab and this is determined by the distance set between the mill rolls.
  • a method of increasing the width of a metal slab comprises the steps of hot rolling a part, but not the lateral edges, of a pair of opposite faces of the slab to form a groove in each of the faces and to increase the width of the slab; hot rolling said pair of opposite faces of the slab, but not the lateral edges thereof, to widen the groove in each of the faces and to increase the width of the slab; and hot rolling the slab, including the said.lateral edges of the faces, to reduce the slab to substantially uniform thickness.
  • the rolls which are employed to widen the grooves do not have a surface which engages with the full width of the slab.
  • a metal slab conveniently formed by a continuous casting operation, is of generally rectangular cross-section and has a pair of opposite faces 1, 3.
  • the slab is heated to rolling temperature and is passed between a pair of rolls in a rolling mill which act on the opposite faces 1, 3 of the slab but the rolls only engage with a central portion of each face and the lateral edges 5, 7 of each face are not in engagement with the rolls.
  • This causes the slab to widen and for a groove 9 to be formed in each of the pair of opposite faces.
  • This slab given the reference 11, may then be hot rolled between a pair of conventional horizontal cylindrical mill rolls which reduce the thickness of the slab and, at the same time, increase its width.
  • Such a slab is indicated by reference 15.
  • the grooves 9 are widened by a second rolling action before the slab is passed between the cylindrical rolls.
  • the slab 11 is hot rolled between a pair of rolls which are shaped to widen the grooves 9, to form grooves 10, without the rolls engaging with the lateral edges 5, 7 of the faces of the slab.
  • This slab with the widened groove is indicated by reference 13.
  • This slab 13 is then passed between the pair of cylindrical rolls which engage with the entire width of the pair of opposite faces to produce a slab 16.
  • the mill stands having the rolls for producing the grooves 9 and the grooves 10, respectively, to be arranged in tandem with the pair of cylindrical rolls so that the initial grooves 9 are first formed, then the wider grooves 10 are formed, and then the thickness of the strip is reduced and made uniform during one pass of the slab through the mill stands.
  • the sides or outside edges 17 of the slab are rather irregular and so the slab 15, 16 can be passed between a pair of vertical edger rolls which will "square-up" the edges 17 and, in doing so, will cause a slight reduction in the width of the slab.
  • Reference 19 shows the slab after it has been passed through a pair of edger rolls.
  • a slab may be widened considerably by the formation of one or more grooves and the subsequent rolling between a pair of cylindrical rolls with the final width of the slab being determined by the separation of the edger rolls.
  • the ouside edges can be squared up by a pair of edger rolls after the grooves have been formed but before the slab is rolled between the pair of cylindrical rolls to reduce it to the required thickness.
  • a conventional rougher mill may be used to produce the slab 15 of reduced thickness.
  • the rolls When the grooves are produced, and subsequently widened, it is convenient for the rolls to act on not more than 70% of the width of the two faces when the grooves are initially formed and, during the second rolling step, for the rolls not to act on more than 90% of the width of the faces of the slab as the grooves are widened.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP85303980A 1984-06-08 1985-06-05 Verfahren zum Walzen einer Metallbramme Withdrawn EP0164265A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB848414600A GB8414600D0 (en) 1984-06-08 1984-06-08 Rolling metal slab
GB8414600 1984-06-08

Publications (2)

Publication Number Publication Date
EP0164265A2 true EP0164265A2 (de) 1985-12-11
EP0164265A3 EP0164265A3 (de) 1986-08-20

Family

ID=10562099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85303980A Withdrawn EP0164265A3 (de) 1984-06-08 1985-06-05 Verfahren zum Walzen einer Metallbramme

Country Status (2)

Country Link
EP (1) EP0164265A3 (de)
GB (1) GB8414600D0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0234739A1 (de) * 1986-01-29 1987-09-02 DAVY McKEE (SHEFFIELD) LIMITED Herstellung von Metallband
US4856313A (en) * 1986-01-30 1989-08-15 Nippon Yakin Kogyo Co., Ltd. Method of controlling strip crown in planetary rolling
WO2012032301A1 (en) 2010-09-10 2012-03-15 Cambridge Enterprise Limited Elongate beam and method for manufacturing elongate beam
EP2653241A1 (de) * 2012-04-18 2013-10-23 Siemens VAI Metals Technologies GmbH Herstellungsverfahren für ein Band

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB520920A (en) * 1938-12-20 1940-05-07 John Houssman Improvements in metal rolling

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0234739A1 (de) * 1986-01-29 1987-09-02 DAVY McKEE (SHEFFIELD) LIMITED Herstellung von Metallband
US4856313A (en) * 1986-01-30 1989-08-15 Nippon Yakin Kogyo Co., Ltd. Method of controlling strip crown in planetary rolling
WO2012032301A1 (en) 2010-09-10 2012-03-15 Cambridge Enterprise Limited Elongate beam and method for manufacturing elongate beam
EP2653241A1 (de) * 2012-04-18 2013-10-23 Siemens VAI Metals Technologies GmbH Herstellungsverfahren für ein Band
WO2013156332A1 (de) * 2012-04-18 2013-10-24 Siemens Vai Metals Technologies Gmbh Herstellungsverfahren für ein band

Also Published As

Publication number Publication date
GB8414600D0 (en) 1984-07-11
EP0164265A3 (de) 1986-08-20

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Inventor name: LAWSON, KENNETH THOMAS