EP0098424A1 - Method of rolling blooms - Google Patents

Method of rolling blooms Download PDF

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Publication number
EP0098424A1
EP0098424A1 EP83105899A EP83105899A EP0098424A1 EP 0098424 A1 EP0098424 A1 EP 0098424A1 EP 83105899 A EP83105899 A EP 83105899A EP 83105899 A EP83105899 A EP 83105899A EP 0098424 A1 EP0098424 A1 EP 0098424A1
Authority
EP
European Patent Office
Prior art keywords
raw
slab
sides
upsetting
broadband
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Withdrawn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
EP83105899A
Other languages
German (de)
French (fr)
Inventor
Heinrich Bohnenkamp
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
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 SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0098424A1 publication Critical patent/EP0098424A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B21B1/224—Edge rolling of flat products
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • 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
    • B21B2263/00—Shape of product
    • B21B2263/10—Lateral spread defects
    • B21B2263/12—Dog bone
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49991—Combined with rolling

Definitions

  • the invention relates to a method for rolling broadband raw material, a raw slab being rolled to the intended broadband width by upsetting the narrow sides.
  • standard material graded according to the intended bandwidth is usually used in broadband lines.
  • the grading of the raw material can either be done by casting raw slabs of different widths or by strong upsetting, i.e. Reducing the width of raw slabs of uniform cross-section can be effected. Both methods are associated with considerable disadvantages.
  • the object is achieved according to the invention in that a raw slab with a cross-section tapered on both sides in the form of a wedge or curve to the narrow sides is compressed to approximately the intended broadband width while filling the rectangular shape.
  • the width of the raw slab is reduced without bulges on the broad sides of the slab, so that spreading back during flat rolling is avoided.
  • the required width reduction can usually already be achieved with a compression stitch. This saving on compression stitches and flat rolling stitches saves time and energy. Since the new process no longer forms a fish tail at the end of the primary material, the amount of scrap is reduced considerably.
  • raw slabs produced by continuous casting can be used in the method according to the invention.
  • the continuous casting of the slabs which are tapered in a wedge or curve shape on both sides to the narrow sides without mold adjustment, leads to higher productivity with less investment.
  • a raw slab 1 with a rectangular cross section according to FIG. 1 is compressed by a swaging roll stand 2 according to FIG. 2 from width a to width b.
  • the bulges 4 must be smoothed in the downstream horizontal roll stand 5 by a flat stitch. This results in a return of 2r.
  • a raw slab 6 according to FIG. 3 is used, the broad sides 7 of which have angled outer regions 7a which taper the cross section to the narrow sides 8 of the slab.
  • the upset material 10 fills the edges 11 up to the rectangular shape of the slab. There are no bulges on the broad sides 7, so that subsequent flat rolling with the disadvantage of the back spreading of the slab can be omitted.
  • the raw slab shown in FIG. 3 can be reduced to the intended bandwidth on the upsetting roll stand 9 without flat passes on a horizontal roll stand in a upsetting pass.
  • a special horizontal roller Setting up for rolling flat bulges is therefore saved
  • the special shape of the raw slab 6 can preferably be produced by continuous casting.
  • the method cannot only be carried out with the blunt-wedge shaped slab shape shown in FIG. 3.
  • the aim of the invention can also be achieved with a raw slab that is tapered on both sides.

Landscapes

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

Abstract

Bei einem Verfahren zum Walzen von Breitbandvormaterial wird eine Rohbramme durch Stauchen der Schmalseiten auf die vorgesehene Breitbandbreite gewalzt. Zur Einsparung von Zeit, Energie, Material und Investitionsmitteln wird eine Rohbramme mit an beiden Seiten keilförmig oder kurvenförmig zu den Schmalseiten verjüngt geformtem Querschnitt unter Auffüllung der Rechteckform etwa auf die vorgesehene Breitbandbreite gestaucht.In a method for rolling broadband raw material, a raw slab is rolled to the intended broadband width by upsetting the narrow sides. In order to save time, energy, material and investment resources, a raw slab with a cross-section tapered on both sides in a wedge-shaped or curved shape is compressed to the intended broadband width, filling the rectangular shape.

Description

Die Erfindung betrifft ein Verfahren zum Walzen von Breitbandvormaterial, wobei eine Rohbramme durch Stauchen der Schmalseiten auf die vorgesehene Breitbandbreite gewalzt wird.The invention relates to a method for rolling broadband raw material, a raw slab being rolled to the intended broadband width by upsetting the narrow sides.

Zum Walzen von Breitband unterschiedlicher Breite wird in Breitbandstraßen üblicherweise entsprechend der vorgesehenen Bandbreite abgestuftes Vormaterial verwendet. Die Breitenabstufung des Vormaterials kann entweder bereits durch Gießen unterschiedlich breiter Rohbrammen oder durch starkes Stauchen, d.h. Reduzieren der Breite von Rohbrammen gleichmäßigen Querschnitts bewirkt werden. Beide Verfahren sind mit erheblichen Nachteilen verbunden.For rolling broadband of different widths, standard material graded according to the intended bandwidth is usually used in broadband lines. The grading of the raw material can either be done by casting raw slabs of different widths or by strong upsetting, i.e. Reducing the width of raw slabs of uniform cross-section can be effected. Both methods are associated with considerable disadvantages.

Falls die Breitenabstufung bereits innerhalb einer Stranggießanlage erfolgt, sind hierfür verstellbare Kokillen erforderlich. Die Formatverstellung einer Stranggießkokille bei einer Gießunterbrechung bedeutet Produktionsverlust und zusätzliche Rüstarbeiten. Die Formatverstellung einer Stranggießkokille während des Gießbetriebes erfordert aufwendige Verstell- und Steuervorrichtungen. Hierbei entstehen unbrauchbare keilförmige übergangsstücke zwischen den Formaten, wodurch gleichfalls die Produktion begrenzt wird.If the gradation in width already takes place within a continuous caster, adjustable molds are required. Changing the format of a continuous casting mold in the event of a break in production means loss of production and additional set-up work. The format adjustment of a continuous casting mold during the casting operation requires complex adjustment and control devices. This creates unusable wedge-shaped transition pieces between the formats, which also limits production.

Beim bekannten Stauchen der Rohbrammen auf die vorgesehenen Breitbandbreiten entstehen an den Breitseiten Aufwölbungen. Wenn diese Aufwölbungen durch Flachwalzen beseitigt werden, kommt es zu einer starken Rückbreitung der Bramme, so daß der Stauchvorgang bis zur Erzielung der vorgesehenen Breite mehrfach wiederholt werden muß. Beim Flachwalzen der Aufwölbungen kommt es in deren Bereich zu einer verstärkten Längung des Walzgutes, wodurch sich dessen Ende fischschwanzartig ausbildet. Dieser Abschnitt geht als Schrott verloren. Das bekannte Stauchen der Rohbrammen auf wechselnde Breiten erfordert ferner ein aufwendiges Breitenreduzierwalzwerk, das erst oberhalb einer Produktion von 4 Mill to wirtschaftlich eingesetzt werden kann.With the known upsetting of the raw slabs to the intended broadband widths, bulges occur on the broad sides. If these bulges are removed by flat rolling, the slab is strongly spread back, so that the upsetting process has to be repeated several times until the intended width is achieved. When the bulges are rolled flat, there is an increased elongation of the rolling stock in their area, as a result of which the end is formed like a fishtail. This section is lost as scrap. The well-known upsetting of the raw slabs to changing widths also requires a complex width reduction mill that can only be used economically above a production of 4 million tons.

Mit der Erfindung sollen die Nachteile der bekannten Verfahren vermieden werden. Ihr Ziel ist ein Verfahren zum Walzen von Vormaterial für Breitband aus Rohbrammen, wobei das Stauchen der Rohbramme zur Anpassung an unterschiedliche Breitbandbreiten mit geringerem Aufwand an Zeit, Energie, Material und Investitionsmitteln erreichbar ist.The disadvantages of the known methods are to be avoided with the invention. Their goal is a process for rolling raw material for broadband from raw slabs, whereby the compression of the raw slab to adapt to different broadband widths can be achieved with less expenditure of time, energy, material and investment funds.

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine Rohbramme mit an beiden Seiten keilförmig oder kurvenförmig zu den Schmalseiten verjüngt geformtem Querschnitt unter Auffüllung der Rechteckform etwa auf die vorgesehene Breitbandbreite gestaucht wird.The object is achieved according to the invention in that a raw slab with a cross-section tapered on both sides in the form of a wedge or curve to the narrow sides is compressed to approximately the intended broadband width while filling the rectangular shape.

Dadurch wird eine Breitenreduzierung der Rohbramme ohne Aufwölbungen an den Breitseiten der Bramme erreicht, so daß eine Rückbreitung beim Flachwalzen vermieden wird. Auf diese Weise kann die erforderliche Breitenreduzierung normalerweise bereits mit einem Stauchstich erzielt werden. Durch diese Einsparung von Stauchstichen und Flachwalzstichen wird Zeit und Energie gespart. Da es bei dem neuen Verfahren nicht mehr zur Ausbildung eines Fischschwanzes am Ende des Vormaterials kommt, wird der Schrottanfall erheblich verringert.As a result, the width of the raw slab is reduced without bulges on the broad sides of the slab, so that spreading back during flat rolling is avoided. In this way, the required width reduction can usually already be achieved with a compression stitch. This saving on compression stitches and flat rolling stitches saves time and energy. Since the new process no longer forms a fish tail at the end of the primary material, the amount of scrap is reduced considerably.

Bei dem erfindungsgemäßen Verfahren können gemäß einem weiteren Merkmal durch Stranggießen erzeugte Rohbrammen verwendet werden. Das Stranggießen der an beiden Seiten zu den Schmalseiten keilförmig oder kurvenförmig verjüngten Brammen ohne Kokillenverstellung führt bei geringerem Investitonsaufwand zu höherer Produktivität.According to a further feature, raw slabs produced by continuous casting can be used in the method according to the invention. The continuous casting of the slabs, which are tapered in a wedge or curve shape on both sides to the narrow sides without mold adjustment, leads to higher productivity with less investment.

In der Zeichnung ist die Erfindung verdeutlicht. Es zeigen

  • Fig. 1 den Querschnitt einer rechteckigen Rohbramme vor und nach einem Stauchstich,
  • Fig. 2 schematisch eine aus einem Stauchwalzgerüst und einem Horizontalwalzgerüst bestehende Breitenreduzierstraße,
  • Fig. 3 den Querschnitt einer Rohbramme vor und nach dem erfindungsgemäßen Verfahren und
  • Fig. 4 schematisch ein Stauchwalzgerüst zur Durchführung des Verfahrens.
The invention is illustrated in the drawing. Show it
  • 1 shows the cross section of a rectangular raw slab before and after an upsetting stitch,
  • 2 schematically shows a width reduction mill consisting of an upsetting roll stand and a horizontal roll stand,
  • Fig. 3 shows the cross section of a raw slab before and after the inventive method and
  • Fig. 4 shows schematically an upsetting roll stand for carrying out the method.

Bei dem bekannten Verfahren wird eine Rohbramme 1 mit rechteckigem Querschnitt gemäß Fig. 1 durch ein Stauchwalzgerüst 2 gemäß Fig. 2 von der Breite a auf die Breite b gestaucht. Hierbei entstehen an den Breitseiten 3 Aufwölbungen 4. Die Aufwölbungen 4 müssen im nachgeordneten Horizontalwalzgerüst 5 durch einen Flachstich geglättet werden. Dabei kommt es zu einer Rückbreitung um den Betrag 2r. Zur Erzielung der neuen Breite b sind daher drei Walzstiche erforderlich.In the known method, a raw slab 1 with a rectangular cross section according to FIG. 1 is compressed by a swaging roll stand 2 according to FIG. 2 from width a to width b. This results in 3 bulges on the broad sides 4. The bulges 4 must be smoothed in the downstream horizontal roll stand 5 by a flat stitch. This results in a return of 2r. To achieve the new width b, three roll passes are required.

Nach dem erfindungsgemäßen Verfahren wird eine Rohbramme 6 gemäß Fig. 3 verwendet deren Breitseiten 7 abgewinkelte Außenbereiche 7a aufweisen, die den Querschnitt keilförmig verjüngend zu den Schmalseiten 8 der Bramme verlaufen.According to the method according to the invention, a raw slab 6 according to FIG. 3 is used, the broad sides 7 of which have angled outer regions 7a which taper the cross section to the narrow sides 8 of the slab.

Beim Stauchen der Schmalseiten 8 durch das Stauchwalzgerüst 9 (Fig. 4) füllt das gestauchte Material 10 die Kanten 11 bis zur Rechteckform der Bramme auf. Hierbei entstehen keine Aufwölbungen an den Breitseiten 7, so daß ein anschließendes Flachwalzen mit dem Nachteil der Rückbreitung der Bramme entfallen kann.When upsetting the narrow sides 8 through the upsetting roll stand 9 (FIG. 4), the upset material 10 fills the edges 11 up to the rectangular shape of the slab. There are no bulges on the broad sides 7, so that subsequent flat rolling with the disadvantage of the back spreading of the slab can be omitted.

Die in Fig. 3 dargestellte Rohbramme kann allein auf dem Stauchwalzgerüst 9 ohne Flachstiche auf einem Horizontalwalzgerüst in einem Stauchstich auf die vorgesehene Bandbreite reduziert werden. Ein besonderes Horizontalwalzgerüst zum Flachwalzen von Aufwölbungen wird daher eingespartThe raw slab shown in FIG. 3 can be reduced to the intended bandwidth on the upsetting roll stand 9 without flat passes on a horizontal roll stand in a upsetting pass. A special horizontal roller Setting up for rolling flat bulges is therefore saved

Die besondere Form der Rohbramme 6 kann vorzugsweise durch Stranggießen erzeugt werden. Das Verfahren ist jedoch nicht nur mit der in Fig. 3 dargestellten stumpfkeilförmigen Rohbrammenform durchführbar. So ist z.B. das Erfindungsziel auch mit einer Rohbramme erreichbar, die beidseits kurvenförmig verjüngt ist.The special shape of the raw slab 6 can preferably be produced by continuous casting. However, the method cannot only be carried out with the blunt-wedge shaped slab shape shown in FIG. 3. For example, the aim of the invention can also be achieved with a raw slab that is tapered on both sides.

Claims (2)

1. Verfahren zum Walzen von Breitbandvormaterial, wobei eine Rohbramme durch Stauchen der Schmalseiten etwa auf die vorgesehene Breitbandbreite gewalzt wird,
dadurch gekennzeichnet,
daß eine Rohbramme mit an beiden Seiten keilförmig oder kurvenförmig zu den Schmalseiten verjüngt geformtem Querschnitt unter Auffüllung der Rechteckform gestaucht wird.1. Method for rolling broadband raw material, a raw slab being rolled to the intended broadband width by upsetting the narrow sides,
characterized,
that a raw slab with a wedge-shaped or curved shape tapered on both sides to the narrow sides is compressed while filling the rectangular shape. 2. Verwendung von durch Stranggießen erzeugten Rohbrammen mit an beiden Seiten keilförmig oder kurvenförmig zu den Schmalseiten verjüngt geformtem Querschnitt bei einem Verfahren nach Anspruch 1.2. Use of raw slabs produced by continuous casting with a cross-section tapered on both sides in the form of a wedge or curve to the narrow sides in a method according to claim 1.
EP83105899A 1982-07-07 1983-06-16 Method of rolling blooms Withdrawn EP0098424A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3225313 1982-07-07
DE19823225313 DE3225313A1 (en) 1982-07-07 1982-07-07 METHOD FOR ROLLING BROADBAND PRE-MATERIAL

Publications (1)

Publication Number Publication Date
EP0098424A1 true EP0098424A1 (en) 1984-01-18

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ID=6167800

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Application Number Title Priority Date Filing Date
EP83105899A Withdrawn EP0098424A1 (en) 1982-07-07 1983-06-16 Method of rolling blooms

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US (1) US4513491A (en)
EP (1) EP0098424A1 (en)
JP (1) JPS5921401A (en)
DE (1) DE3225313A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100208699B1 (en) * 1995-06-21 1999-07-15 데쯔아끼 쯔다 Continuous casting of thin cast pieces
US20060137851A1 (en) * 2004-12-27 2006-06-29 Gyan Jha Shaped direct chill aluminum ingot
US8381385B2 (en) * 2004-12-27 2013-02-26 Tri-Arrows Aluminum Inc. Shaped direct chill aluminum ingot
CN103831413B (en) * 2014-03-13 2015-12-02 钢铁研究总院 A kind of support roller device and method of band chamfering continuous casting billet being carried out to bight distortion
DE102022212909A1 (en) * 2022-11-30 2024-06-06 Sms Group Gmbh Method for processing a cast strand

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE677414C (en) * 1934-09-29 1939-06-24 American Smelting Refining Process for the preparatory processing of metal castings (ingots) that are narrowed at both ends for the subsequent rolling
DE1602190A1 (en) * 1966-03-18 1970-03-26 United States Steel Corp Method and device for rolling a metal plate in a planetary rolling mill
DE2545935A1 (en) * 1975-10-14 1977-04-28 Sack Gmbh Maschf PROCESS AND ROLLING MILL FOR ROLLING OUT A SLAB, PREFERABLY A CONTINUOUSLY CAST SLAB, TO A BILLET WITH A SQUARE OR APPROXIMATELY SQUARE SECTION

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US993698A (en) * 1910-09-08 1911-05-30 William Mcconway Method of manufacturing cast-steel billets and commercial blanks.
US3958987A (en) * 1975-03-17 1976-05-25 Southwire Company Aluminum iron cobalt silicon alloy and method of preparation thereof
DE2940473A1 (en) * 1978-04-07 1981-01-15 Nippon Steel Corp METHOD AND DEVICE FOR PRODUCING METAL PROFILES

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE677414C (en) * 1934-09-29 1939-06-24 American Smelting Refining Process for the preparatory processing of metal castings (ingots) that are narrowed at both ends for the subsequent rolling
DE1602190A1 (en) * 1966-03-18 1970-03-26 United States Steel Corp Method and device for rolling a metal plate in a planetary rolling mill
DE2545935A1 (en) * 1975-10-14 1977-04-28 Sack Gmbh Maschf PROCESS AND ROLLING MILL FOR ROLLING OUT A SLAB, PREFERABLY A CONTINUOUSLY CAST SLAB, TO A BILLET WITH A SQUARE OR APPROXIMATELY SQUARE SECTION

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED, Sektion Ch, Woche B 21, 4. Juli 1979 DERWENT PUBLICATIONS LTD., London Seite M 21 * SU-615 956 ( UKR METAL RES ) * *

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Publication number Publication date
JPS5921401A (en) 1984-02-03
DE3225313A1 (en) 1984-01-12
US4513491A (en) 1985-04-30

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