EP0091156B1 - Appareil pour la réduction de la largeur d'une brame d'acier par laminage - Google Patents

Appareil pour la réduction de la largeur d'une brame d'acier par laminage Download PDF

Info

Publication number
EP0091156B1
EP0091156B1 EP83200418A EP83200418A EP0091156B1 EP 0091156 B1 EP0091156 B1 EP 0091156B1 EP 83200418 A EP83200418 A EP 83200418A EP 83200418 A EP83200418 A EP 83200418A EP 0091156 B1 EP0091156 B1 EP 0091156B1
Authority
EP
European Patent Office
Prior art keywords
rolling
edge
slab
elements
rolling elements
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
Application number
EP83200418A
Other languages
German (de)
English (en)
Other versions
EP0091156A1 (fr
Inventor
Rein Lukas Huisman
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.)
Tata Steel Ijmuiden BV
Original Assignee
Hoogovens Groep BV
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 Hoogovens Groep BV filed Critical Hoogovens Groep BV
Priority to AT83200418T priority Critical patent/ATE14685T1/de
Publication of EP0091156A1 publication Critical patent/EP0091156A1/fr
Application granted granted Critical
Publication of EP0091156B1 publication Critical patent/EP0091156B1/fr
Expired legal-status Critical Current

Links

Images

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/06—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged vertically, e.g. edgers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/18—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling; pendulum mills

Definitions

  • the invention relates to an apparatus for reducing the width of a steel slab by rolling, comprising edge-rolling elements, the rolling surfaces of which are moved in a rolling manner on the edges of the steel slab.
  • width rolling Reducing the width of a steel slab by rolling (hereinafter called width rolling) is an important development in the field of the hot strip rolling of steel.
  • width rolling is carried out directly after the continuous casting of the slab. In most cases however, it is best to carry out width rolling in the hot strip rolling mill.
  • the known width rolling is carried out with edge rolls.
  • the diameter of the edge rolls is up to approximately 800 mm. Only a small reduction in width, by a maximum of 40-60 mm can be obtained with these edge rolls. With a greater width reduction one experiences problems when feeding the slab into the edge rolls. For this reason, larger diameter edge rolls have been adopted, going up to 1200 mm diameter as shown in US 3,757 556. With a diameter of 1200 mm, the maximum width reduction per pass is 150 mm; at this width there is substantial dog-bone formation as will now be discussed.
  • width rolling is the irregular deformation of the piece being rolled. Firstly the material is not spread evenly over the width during width rolling; but ends up thicker at the edges. In a cross-section at right angles to the direction of rolling, the piece being rolled exhibits a so-called dog-bone shape after rolling. This effect can be minimized by using the caliber rolls known from US 3,757,556, but even then the maximum width reduction is limited by the formation of a dog-bone to the maximum of 100 mm per pass, after which the resulting dog-bone can largely be rolled flat during the following thickness rolling pass. Also during thickness rolling, part of the width reduction obtained by width rolling is lost as a result of expansion of the piece being rolled. Secondly, the material is not distributed evenly in the longitudinal direction during width rolling.
  • the elongation of the slab is not uniform in the middle and at the sides, as a result of which the original square ends of the head and tail of the slab exhibit a so-called fish-tail shape after width rolling.
  • This effect is further amplified by thickness rolling, after width rolling, in which, during rolling flat of the dog-bone shape, irregular elongation of the slab also occurs.
  • This deformation results in a loss of material as the deformed ends have to be cut off before final rolling in the hot strip rolling mill. As a result of this the slab output is smaller for width rolling.
  • edge-rolling elements are circular-section cylindrical rolls, there are technical and economic drawbacks, especially if the rolls are very large, e.g. 5 m radius.
  • One drawback is simply the space which they take up.
  • the rolling elements it is not necessary for the rolling elements to be circular-section rolls.
  • the contact surface between the slab and the rolling element is only a portion of the full circumference of the roll, and a rolling element need only provide an appropriately curved surface in the zone of rolling contact.
  • the present invention provides apparatus for reducing the width of the steel slab by rolling having a pair of opposed edge rolling elements which each provide, at the zone of rolling contact with the slab, a curved surface which is a sector of angular length less than 180°. In this way, we can avoid the use of large rolls, while retaining the benefit of reduced deformation and greater output.
  • the roll elements no longer need to be able to rotate through 360°. After a pass corresponding to the arc length of the sector the roll elements can be returned to roll the next slab or the next section of the slab.
  • the angular length of the curved surface is no more than 90°.
  • edge-rolling elements with a greater diameter it is preferable for there not to be a physical centre of rotation, as in full-circle cylindrical edging rolls, but for the edge-rolling elements to be designed such that measured in a direction at right angles to the rolling surface they are of a thickness which is smaller than the radius of curvature of the rolling surface.
  • the rolling movement of the edge-rolling elements and the sides of the slab is here produced by an appropriate movement mechanism of the edge-rolling elements and/or slab.
  • the geometric centre of the rolling surface of the edge-rolling elements can be moved in a direction parallel to and opposite to the direction of rolling.
  • the apparatus also includes a number of back-up rolls, which form a path for the edge-rolling elements and which, during rolling, cooperate to support the side of the edge-rolling elements facing away from the slab.
  • the edge-rolling elements are preferably designed with grooves, like caliber rolls, where the bottom of the groove forms the roll surface.
  • the edge-rolling elements may also be flexible in the direction of rolling and during rolling have a curve dependent on the track formed by the back-up rolls.
  • the edge-rolling elements are preferably made in the form of caterpillar or apron conveyors, which are closed to themselves.
  • the irregular deformation of the length and thickness of the slab during width rolling is smaller the greater the radius of curvature of the edge-rolling elements.
  • a radius of curvature which is only slightly greater than the conventional maximum radius of curvature of 0.6 m of known edging rolls gives an advantage. In the following embodiments will be discussed where the radius of curvature of the edge-rolling elements is much greater than for the known edging rolls.
  • Edge-rolling elements with a much greater radius of curvature when they take the form of full circle cylindrical edging rolls, have technical and economic drawbacks such as a large space requirement, the need for a heavy foundation and the need for high driving power.
  • edge-rolling elements it is possible, and sufficient for practical purposes to provide sector of angle a which is less than 360°; the length of the contact roll surface 3 being chosen in dependence on the length of slab 1 which is to be edge-rolled.
  • the rolling movement of the edge-rolling elements is obtained by rotation in the direction of the arrows 11 about the centres of curvature 10.
  • the edge-rolling elements do not need to be further rotated to complete 360° to roll a following slab, but can be returned to their starting positions by reverse rotation after each rolling action.
  • the rolling movement can also be obtained by moving centres 10 in direction 12, parallel and opposite to the rolling direction 5.
  • Figure 3 shows an embodiment where the edge-rolling elements 8 are so designed that they do not extend in the direction at right angles to the rolling surface 3 for the entire radius of curvature of the rolling surface.
  • the edge-rolling elements 8 are arcuate in shape and each have a swivelling point 13 at each end. By means of a movement mechanism not shown, which is linked with swivelling points 13, the edge-rolling elements 8 are moved so as to roll the edges 4 of the slab with the two rolling surfaces 3.
  • the length of the rolling surface of the edge-rolling elements can be selected such that with these edge-rolling elements a slab of maximum envisaged length can be rolled in one pass.
  • the length selected can also be smaller, as shown in Figure 3, and the slab rolled in a number of passes with the edge-rolling elements.
  • Figure 4 shows another embodiment of the apparatus with edge-rolling elements of a thickness of less than the radius of curvature of the rolling surface.
  • the edge-rolling elements 8 are supported, guided and possibly driven by a number of back-up rolls 14, which form a track for the edge-rolling elements 8.
  • the edge-rolling elements can be flexible in the rolling direction 5, with the curvature of the rolling surfaces during width rolling being dependent on the path formed by the back-up rolls 14.
  • Figure 5 shows an embodiment in which the edge-rolling elements are flexible and form caterpillar or apron conveyors 15, which are closed loops.
  • the edge-rolling elements 8 can have a caliber groove 16. This reduces the formation of a dog-bone in slab 1 still further.
  • the bottom of the groove 16 forms the rolling surface 3 mentioned above.
  • the test was carried out on a scale reduced by 10.
  • the dimensions of the plasticine slab were 180 x 22.5 x 600 mm.
  • the radius of curvature of the roll elements was 1000 mm.
  • the width reduction was 15 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Claims (9)

1. Appareil pour la réduction de la largeur d'une brame d'acier par laminage, comportant deux éléments opposés (8, 15) de laminage sur chants comportant des surfaces de laminage (3) qui, pendant le laminage, viennent au contact des chants de la brame, et qui ont un rayon de courbure supérieur à 0,6 m, caractérisé en ce que les éléments (8, 15) de laminage sur chants présentent chacun, dans la zone de contact de laminage avec la brame, une surface de laminage (3) circulairement cylindrique qui est un secteur de longeur angulaire inférieure à 180°.
2. Appareil selon la revendication 1, dans lequel la longueur angulaire des surfaces de laminage (3) circulairement cylindriques ne dépasse pas 90°.
3. Appareil selon la revendication 1 ou la revendication 2, dans lequel les centres mathématiques (10) des surfaces de laminage des éléments de laminage sur chants sont conçus pour être déplacés pendant le laminage dans le sens parallèle et contraire au sens du laminage (5).
4. Appareil selon l'une quelconque des revendications 1 à 3, dans lequel les éléments (8, 15) de laminage sur chants ont une épaisseur qui, vue dans la zone de contact de laminage dans le sens transversal au sens du laminage, est inférieure au rayon de courbure de la surface de laminage (3).
5. Appareil selon la revendication 4, comportant en outre un ensemble de cylindres d'appui (14) pour chaque élément (8, 15) de laminage sur chants, les cylindres d'appui formant un chemin pour les éléments de laminage sur chants et supportant la face des éléments de laminage sur chants tournée à l'opposé de la brame pendant le laminage.
6. Appareil selon l'une quelconque des revendications précédentes, dans laquel les éléments (8) de laminage sur chants sont des secteurs de cylindres rigides (Fig. 2, 3 et 4).
7. Appareil selon la revendication 5, dans lequel les éléments (15) de laminage sur chants sont souples de manière à s'incurver dans le plan de laminage et, pendant le laminage, ont dans la zone de laminage une courbure déterminée par le chemin formé par les cylindres d'appui (14) (Fig. 5).
8. Appareil selon la revendication 7, dans lequel les éléments de laminage sur chants sont des éléments sans fin (15) souples allongés.
9. Appareil selon l'une quelconque des revendications précédentes, dans lequel les éléments de laminage sur chants possédant chacun une cannelure, dont le fond est ladite surface de laminage et dont les parois latérales viennent pendant le laminage au contact des surfaces principales de la brame.
EP83200418A 1982-04-07 1983-03-25 Appareil pour la réduction de la largeur d'une brame d'acier par laminage Expired EP0091156B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83200418T ATE14685T1 (de) 1982-04-07 1983-03-25 Geraet zur breitenverminderung einer stahlbramme durch walzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8201499A NL8201499A (nl) 1982-04-07 1982-04-07 Inrichting voor het door walsen in aanzienlijke mate reduceren van de breedte van een stalen plak.
NL8201499 1982-04-07

Publications (2)

Publication Number Publication Date
EP0091156A1 EP0091156A1 (fr) 1983-10-12
EP0091156B1 true EP0091156B1 (fr) 1985-08-07

Family

ID=19839558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200418A Expired EP0091156B1 (fr) 1982-04-07 1983-03-25 Appareil pour la réduction de la largeur d'une brame d'acier par laminage

Country Status (5)

Country Link
EP (1) EP0091156B1 (fr)
JP (1) JPS58187202A (fr)
AT (1) ATE14685T1 (fr)
DE (1) DE3360508D1 (fr)
NL (1) NL8201499A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2639594B2 (ja) * 1989-12-23 1997-08-13 株式会社河合楽器製作所 電子機器
JPH03200286A (ja) * 1989-12-28 1991-09-02 Kawai Musical Instr Mfg Co Ltd 電子機器の操作装置
NL9301269A (nl) * 1993-07-20 1995-02-16 Hoogovens Groep Bv Inrichting voor het door kantwalsen uitvoeren van een grote breedtereductie op een metalen plak.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422656A (en) * 1966-03-18 1969-01-21 United States Steel Corp Method of rolling slabs in planetary mill
JPS5942561B2 (ja) * 1980-02-13 1984-10-16 新日本製鐵株式会社 熱間圧延方法

Also Published As

Publication number Publication date
NL8201499A (nl) 1983-11-01
DE3360508D1 (en) 1985-09-12
ATE14685T1 (de) 1985-08-15
EP0091156A1 (fr) 1983-10-12
JPS58187202A (ja) 1983-11-01

Similar Documents

Publication Publication Date Title
SU1306468A3 (ru) Клеть прокатного стана
US3777532A (en) Method of and apparatus for extending and reducing thickness of a metallic band
US5953946A (en) Apparatus for bend-straightening metal strip
US4385512A (en) Tandem rolling mill train for metal plate and sheet
EP0091156B1 (fr) Appareil pour la réduction de la largeur d'une brame d'acier par laminage
EP0351785B1 (fr) Méthode et appareillage pour provoquer des contraintes différentielles lors de la fabrication de bandes métalliques flexibles sans fin pour coulée continue en vue d'améliorer la performance des bandes utilisées dans les machines de coulée continue
CA1257989A (fr) Dispositif de mise en contrainte
JPH0250812B2 (fr)
JPS5884614A (ja) ロ−ラ・レベラ
US4019282A (en) Apparatus for descaling metal strips
JP2882749B2 (ja) コンクリート構造体を補強する補強部材及び該補強部材を製造する装置
US5397402A (en) Silicon steel strip having mechanically refined magnetic domain wall spacings and method for producing the same
CA1213762A (fr) Methode et appareil pour controler la largeur et l'epaisseur d'un feuillard
SU880522A1 (ru) Непрерывный прокатный стан
JPS6186006A (ja) 厚板圧延方法及び装置
US5590559A (en) Method and apparatus for domain refining electrical steels by local mechanical deformation with multiple scribing rolls
US4483166A (en) Device for helically coiling pressure vessel shells
US4728083A (en) Method and apparatus for scribing grain-oriented silicon steel strip
JPH0760356A (ja) Ｈ形鋼の矯正方法
JPH08276206A (ja) 圧延機および圧延方法
JP2585608B2 (ja) テンシヨンロ−ラレベラ
US4202195A (en) Skew rolling mill roller
RU2160651C2 (ru) Способ разливки ленты и устройство для его осуществления
MX162850B (es) Un laminador de cilindros oblicuos y un procedimiento mejorados para el laminado de barras,tubos metalicos y similares
JPS60152303A (ja) クロス圧延装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830325

AK Designated contracting states

Designated state(s): AT BE DE FR GB IT LU SE

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE DE FR GB IT LU SE

REF Corresponds to:

Ref document number: 14685

Country of ref document: AT

Date of ref document: 19850815

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3360508

Country of ref document: DE

Date of ref document: 19850912

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930211

Year of fee payment: 11

Ref country code: AT

Payment date: 19930211

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930217

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19930219

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930222

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930223

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19930312

Year of fee payment: 11

ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940325

Ref country code: GB

Effective date: 19940325

Ref country code: AT

Effective date: 19940325

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940326

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19940331

BERE Be: lapsed

Owner name: HOOGOVENS GROEP B.V.

Effective date: 19940331

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940325

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19941130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19941201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 83200418.8

Effective date: 19941010