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EP0893168A2 - Hot strip mill for hot strip of 0,5 mm thickness - Google Patents

Hot strip mill for hot strip of 0,5 mm thickness Download PDF

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Publication number
EP0893168A2
EP0893168A2 EP98250221A EP98250221A EP0893168A2 EP 0893168 A2 EP0893168 A2 EP 0893168A2 EP 98250221 A EP98250221 A EP 98250221A EP 98250221 A EP98250221 A EP 98250221A EP 0893168 A2 EP0893168 A2 EP 0893168A2
Authority
EP
European Patent Office
Prior art keywords
strip
steckel
wird
tandem
das
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.)
Granted
Application number
EP98250221A
Other languages
German (de)
French (fr)
Other versions
EP0893168A3 (en
EP0893168B1 (en
Inventor
Werner Dipl.-Ing. Kircher
Peter Dipl.-Ing. Jollet
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SMS Siemag AG
Original Assignee
Mannesmann AG
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Filing date
Publication date
Priority claimed from DE1997132538 external-priority patent/DE19732538A1/en
Priority claimed from DE1997149716 external-priority patent/DE19749716A1/en
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0893168A2 publication Critical patent/EP0893168A2/en
Publication of EP0893168A3 publication Critical patent/EP0893168A3/en
Application granted granted Critical
Publication of EP0893168B1 publication Critical patent/EP0893168B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21B1/46—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
    • B21B1/466—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 in a non-continuous process, i.e. the cast being cut before 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
    • B21B1/30—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • B21B2045/006—Heating the product in vacuum or in inert atmosphere
    • 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 producing thin hot-rolled Steel strip with a final thickness of ⁇ 1 mm from strip-shaped cast material in successive steps in which the one leaving the casting plant froze Pre-material divided into pre-strip lengths and in a continuous furnace Rolling temperature is heated to it in a reversing tandem-Steckel stand group as well as the subsequent finishing train.
  • the object of the present invention is to provide a system for the production of extreme thin finished tape, preferably about 0.5 mm thick, to create the few Scaffolding, i.e. low investment costs, has a high system capacity and the without capacity restrictions also for thicker tape dimensions (thicker than 1.2 mm) can be used.
  • the invention therefore consists in the fact that an approximately 90 mm thick or thinner slab is generated at the exit of the casting machine using scissors or other Sub-devices is divided into finite lengths.
  • the resulting slab goes through e.g. a roller hearth furnace and is tempered evenly on a rough road fed.
  • the roughing mill consists of a descaling device, a tandem Steckel scaffolding group with winding furnaces arranged on both sides or one itself directly to the winding device connected to the outlet-side Steckel furnace two superimposed ovens, as it is known as a Cremonabox.
  • the Cremonabox has an upper and a lower changing option, which alternately can be used.
  • the slab emerging from the roller hearth furnace is first descaled and then reduced in thickness in two stitches in the two Steckel stands of the tandem Steckel stand group so that it can be wound up in the winding furnace arranged on the outlet side.
  • the next stitch takes place in reversing mode again with the tandem Steckel scaffolding group, the preliminary strip being fed into the winding furnace arranged on the inlet side.
  • the surface can be descaled once more before the second run of the preliminary strip into the scaffolding group. Descaling can also be done before the last (third) reversing stitch to prevent scale from rolling into the material.
  • the third reversing stitch is carried out again in the direction of the finishing train in the two Steckel stands, so that the supporting strip has undergone a total of six reducing stitches. Following this, the outgoing opening act is mentioned in the above Cremonabox "wound up.
  • the band is reduced to a thickness that ensures safe transport of the band over the Outfeed roller conveyor guaranteed up to the reel.
  • the tapes again later in the continuous rolling divided to achieve the desired waist sizes and weights.
  • the welding together of the cropped Pre-tapes are carried out with the pre-tapes stationary. After the tape from Haspel is taken, the necessary in the pre-roll storage in front of the finishing train The pre-strip length is saved, which is necessary for welding the second opening act to the first opening act is necessary While the first If the strip is rolled in the finishing train, it becomes the second in the roughing train simultaneously The supporting strip is rolled and wound up in the lower oven of the Cremonabox.
  • the supporting strip is attached to the The end of the first band welded on.
  • the Pre-strip storage in front of the finishing train without the rolling process in the finishing train must be interrupted.
  • the now empty upper oven of the Cremonabox swings back in the position to be ready for the third forehand to be, which in turn simultaneously with the rolling process of the second strip in the Finishing line is generated.
  • the finished strip thickness can be adjusted by means of the settings of the finishing train reduced and the rolling speed increased accordingly. To this The goal is to achieve 0.5 mm thick hot strip in austenitic Roll temperature level.
  • the quick-cut shears in front of the reel enable the endless belt to be closed again divide and create a desired waist size.
  • the store in front of the Finishing line filled, so the time required for the welding process of the the next opening to the just rolled forehand. This process always runs in the same rhythm.
  • the second heated pre-strip store is preferably under protective gas and is arranged directly in front of the finishing train.
  • the capacity of the opening memory is according to the run-out speed of the finished strip and the time required designed to weld the leading ends.
  • the finished strip should be thick be brought back to a size that allows easy unthreading Finishing line and safe transport via the exit roller table.
  • Supporting tape in the tandem Steckel scaffolding group in 6 passes to a thickness of for example 3 mm is rolled.
  • the casting machine capacity and the rolling capacity of the roughing and finishing train will be is designed to ensure continuous operation and the desired thermal and geometric requirements for the finished strip be fulfilled.
  • 1 and 1 denote a ladle turret, that of the continuous casting plant 2 and 2 is upstream and supplied with molten casting.
  • the continuous casting installation which is designed as a sheet continuous casting installation with a horizontal outlet, has a flame cutting machine or a pair of scissors 3 and 3 at its outlet end with which the continuously cast strand of raw material is divided into slabs. These slabs run into a roller hearth furnace 4 and 4 a where they are brought to a uniform temperature across their cross-section. With the ferry 5, the slabs from system section 1 to 4 transported to the rolling mill line. In this way the 2 casting machines are connected to the rolling mill.
  • the slab After passing through the roller hearth furnace, the slab is descaled in a scale washer 6 and then fed to the tandem-Steckel stand group 7. After the first pass through this group of stands, the material is wound up in the outlet-side winding furnace 8, which, as claimed, also serves as the intermediate storage for the preliminary strip, as claimed Cremonaofen ", in order to subsequently be reduced again in the reversing mode in the stand group 7. After this pass, the material is wound up in the entry-side winding furnace 9.
  • the third pass through the stand group 7 reduces the material to the desired pre-strip thickness of the winding device 10 and temporarily stored, which consists of two superimposed furnaces, each of which is equipped with a winding mandrel for receiving the pre-strip
  • the ovens serve as temporary storage to compensate for short process irregularities in the subsequent sections of the plant and are also used as Steckelöfen "used in the first reversing stitches. In the latter case, the winding furnace 8 on the outlet side is omitted.
  • the sliver is alternately fed to a pair of scissors 11 from the winding device, which scoops the head of the opening act.
  • the scooped supporting tape goes through one Welding machine 12, where it is also the scooped end of the previous one Pre-strip is welded, a loop tower 13 and a scale washer 14, then in a multi-stand finishing train 15 to the desired finished strip to be rolled.
  • the belt runs through the outlet roller table 16 with integrated belt cooling 17 a quick cut shear 18 to a reel device 19 where it is wound up.
  • Bundaustragewagen 20 and other facilities such as binding machine 21, scales 22, and marking device 23 follow.
  • the finished bundle is by means of Bundle transport device 24 transported and stored in the bundle bearing 25.

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

Abstract

Die Erfindung betrifft ein Verfahren zur Herstellung von dünnem warmgewalzten Stahlband mit einer Enddicke < 1 mm aus bandförmig gegossenem Vormaterial in aufeinander folgenden Schritten, bei dem das

  • ≦ 90 mm dick gegossene Vormaterial nach dem Entzundern der Oberfläche auf der Tandem-Steckel-Gerüstgruppe in 6 Stichen gewalzt wird, wobei das Vormaterial nach dem ersten und zweiten Durchlauf in den den Steckel-Walzgerüsten nach- und vorgeordneten Steckelöfen aufgewickelt wird,
  • daß das Vorband nach dem dritten Durchlauf durch die Steckel-Walzgerüste in eine als Vorbandspeicher für das Vorband dienenden Wickeleinrichtung mit zwei übereinanderliegenden Öfen geführt und aufgehaspelt wird,
  • gleichzeitig mit dem Aufhaspeln des ersten Bundes ein zweites Bund aus dem Zwischenspeicher abgewickelt wird, dessen geschopftes vorderes Ende an das geschopfte hintere Ende des bereits abgewickelten Vorbandes angeschweißt wird,
  • das zu einem endlosen Band zusammengeschweißte Vorband durch einen zweiten Vorbandspeicher hindurch der Fertigstraße zugeführt wird, die das Vorband auf die gewünschte Fertigbanddicke reduziert.
Figure 00000001
The invention relates to a method for producing thin hot-rolled steel strip with a final thickness <1 mm from strip-shaped cast material in successive steps, in which the
  • ≦ After the descaling of the surface, the cast material, 90 mm thick, is rolled in 6 passes on the tandem-Steckel stand group, the feed material being wound up after the first and second pass in the Steckel furnaces downstream of the Steckel roll stands,
  • that after the third pass through the Steckel roll stands, the pre-strip is fed into a winding device serving as pre-strip storage for the pre-strip and has two superposed furnaces,
  • simultaneously with the reeling of the first bundle, a second bundle is unwound from the intermediate store, the cropped front end of which is welded to the cropped rear end of the pre-unwound strip,
  • the pre-strip welded together to form an endless strip is fed through a second pre-strip store to the finishing train, which reduces the pre-strip to the desired finished strip thickness.
Figure 00000001

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von dünnem warmgewalzten Stahlband mit einer Enddicke < 1 mm aus bandförmig gegossenem Vormaterial in aufeinander folgenden Schritten, bei dem das die Gießanlage verlassende erstarrte Vormaterial in Vorbandlängen aufgeteilt und in einem Durchlaufofen auf Walztemperatur erwärmt wird, um es in einer reversierend betriebenen Tandem-Steckel-Gerüstgruppe sowie anschließender Fertigstraße auszuwalzen.The invention relates to a method for producing thin hot-rolled Steel strip with a final thickness of <1 mm from strip-shaped cast material in successive steps in which the one leaving the casting plant froze Pre-material divided into pre-strip lengths and in a continuous furnace Rolling temperature is heated to it in a reversing tandem-Steckel stand group as well as the subsequent finishing train.

Das Walzen von ferritischen Bändern bis zu Abmessungen von ca. 0,7 mm Dicke ist bisher nur im Contibetrieb möglich, d.h. auf Walzanlagen mit einer Vielzahl von Gerüsten und entsprechend hohen Investitionskosten. Schweißmaschinen zum Aneinanderfügen der Vorbänder zur Erzeugung endlosen Bandes wurden synchron mit der Einzugsgeschwindigkeit des Vorbandes in das Walzwerk mitbewegt, was einen hohen maschinellen Aufwand bedeutet.The rolling of ferritic strips up to dimensions of approx. 0.7 mm thickness is previously only possible in continuous operation, i.e. on rolling mills with a variety of Scaffolding and correspondingly high investment costs. Welding machines for Joining the pre-tapes to create endless tape was synchronized moving with the speed of the pre-strip into the rolling mill, what means a lot of machine work.

Aufgabe der vorliegenden Erfindung ist es, eine Anlage zur Herstellung von extrem dünnem Fertigband, vorzugsweise ca. 0,5 mm dick, zu schaffen, die mit wenigen Gerüsten, also geringen Investitionskosten, eine hohe Anlagenkapazität aufweist und die ohne Kapazitätseinschränkungen ebenfalls für dickere Bandabmessungen (dicker als 1,2 mm) genutzt werden kann.The object of the present invention is to provide a system for the production of extreme thin finished tape, preferably about 0.5 mm thick, to create the few Scaffolding, i.e. low investment costs, has a high system capacity and the without capacity restrictions also for thicker tape dimensions (thicker than 1.2 mm) can be used.

Zur Lösung dieser Aufgabe wird vorgeschlagen,

  • a. daß das ≦ 90 mm dick gegossene Vormaterial nach dem Entzundern der Oberfläche auf der Tandem-Steckel-Gerüstgruppe in 6 Stichen gewalzt wird, wobei das Vormaterial nach dem ersten und zweiten Durchlauf in einlauf- und auslaufseitig der Tandem-Steckel-Gerüstgruppe angeordneten Wickelöfen auf- und abgewickelt wird,,
  • b. daß das Vorband nach dem dritten Durchlauf durch die Steckel-Walzgerüste in einer als Zwischenspeicher für das Vorband dienenden auslaufseitigen Wickeleinrichtung mit zwei übereinanderliegenden Öfen aufgehaspelt wird,
  • c. daß gleichzeitig mit dem Aufhaspeln des ersten Bundes ein zweites Bund aus dem Zwischenspeicher abgewickelt wird, dessen geschopftes vorderes Ende an das geschopfte hintere Ende des bereits abgewickelten Vorbandes angeschweißt wird,
  • d. daß das zu einem endlosen Band zusammengeschweißte Vorband durch einen zweiten Vorbandspeicher hindurch der Fertigstraße zugeführt wird, die das Vorband auf die gewünschte Fertigbanddicke reduziert.
    • To solve this task, it is proposed
  • a. that the ≦ 90 mm thick cast material is rolled in 6 passes after descaling the surface on the tandem-Steckel stand group, whereby after the first and second pass the feed material is placed in winding furnaces arranged on the inlet and outlet side of the tandem-Steckel stand group. and is processed ,,
  • b. that after the third pass through the Steckel roll stands, the pre-strip is wound up in an outlet-side winding device, which serves as a buffer for the pre-strip, with two superimposed furnaces,
  • c. that at the same time as the first coil is being wound up, a second coil is unwound from the intermediate store, the cropped front end of which is welded to the cropped rear end of the pre-unwound strip,
  • d. that the pre-strip welded together to form an endless strip is fed through a second pre-strip store to the finishing train, which reduces the pre-strip to the desired finished strip thickness.

    • Die Erfindung besteht also darin, daß eine ca. 90 mm dicke oder dünnere Bramme erzeugt wird, die am Ausgang der Gießanlage mittels einer Schere oder anderen Teileinrichtungen in endliche Längen zerteilt wird. Die so entstandene Bramme durchläuft z.B. einen Rollenherdofen und wird gleichmäßig temperiert einer Vorstraße zugeführt. Die Vorstraße besteht aus einer Entzunderungseinrichtung, einer Tandem-Steckel-Gerüstgruppe mit beidseitigen angeordneten Wickelöfen bzw. einer sich unmittelbar an den auslaufseitigen Steckelofen anschließenden Wickeleinrichtung mit zwei übereinanderliegenden Öfen, wie sie als Cremonabox bekannt ist. Die Cremonabox hat eine obere und eine untere Wickelmöglichkeit, die wechselweise einsetzbar sind.The invention therefore consists in the fact that an approximately 90 mm thick or thinner slab is generated at the exit of the casting machine using scissors or other Sub-devices is divided into finite lengths. The resulting slab goes through e.g. a roller hearth furnace and is tempered evenly on a rough road fed. The roughing mill consists of a descaling device, a tandem Steckel scaffolding group with winding furnaces arranged on both sides or one itself directly to the winding device connected to the outlet-side Steckel furnace two superimposed ovens, as it is known as a Cremonabox. The Cremonabox has an upper and a lower changing option, which alternately can be used.

    Die aus dem Rollenherdofen auslaufende Bramme wird zuerst entzundert und dann in den beiden Steckelgerüsten der Tandem-Steckel-Gerüstgruppe in zwei Stichen so weit in der Dicke reduziert, daß sie im auslaufseitig angeordneten Wickelofen aufgewickelt werden kann. Der nächste Stich erfolgt im Reversierbetrieb erneut mit der Tandem-Steckel-Gerüstgruppe, wobei das Vorband in den einlaufseitig angeordneten Wickelofen geführt wird. Vor dem zweiten Einlauf des Vorbandes in die Gerüstgruppe kann die Oberfläche ein weiteres mal entzundert werden. Eine Entzunderung kann auch vor dem letzten (dritten) Reversierstich erfolgen, um ein Einwalzen von Zunder in das Material zu verhindern. Der dritte Reversierstich wird wieder in Richtung Fertigstraße in den zwei Steckel-Gerüsten durchgeführt, so daß das Vorband insgesamt sechs Reduzierstiche erfahren hat. Im Anschluß daran wird das auslaufende Vorband in der oben erwähnten

    Figure 00030001
    Cremonabox" aufgewickelt.The slab emerging from the roller hearth furnace is first descaled and then reduced in thickness in two stitches in the two Steckel stands of the tandem Steckel stand group so that it can be wound up in the winding furnace arranged on the outlet side. The next stitch takes place in reversing mode again with the tandem Steckel scaffolding group, the preliminary strip being fed into the winding furnace arranged on the inlet side. The surface can be descaled once more before the second run of the preliminary strip into the scaffolding group. Descaling can also be done before the last (third) reversing stitch to prevent scale from rolling into the material. The third reversing stitch is carried out again in the direction of the finishing train in the two Steckel stands, so that the supporting strip has undergone a total of six reducing stitches. Following this, the outgoing opening act is mentioned in the above
    Figure 00030001
    Cremonabox "wound up.

    Es hat sich als günstig herausgestellt, als auslaufseitig angeordneten Wickelofen gemäß Merkmal a. die als Zwischenspeicher für das Vorband dienende auslaufseitigen Wickeleinrichtung gemäß Merkmal b. zu verwenden. Dadurch entfällt ein zusätzlicher Wickelofen zwischen den Steckel-Gerüsten und der Cremonabox", denn diese kann problemlos sowohl als Wickelofen wie auch als Zwischenspeicher eingesetzt werden.It has been found to be favorable as a winding furnace arranged on the outlet side in accordance with feature a. the outlet-side winding device serving as a buffer for the opening strip according to feature b. to use. This eliminates the need for an additional winding furnace between the Steckel stands and the Cremonabox ", because this can be used as a winding furnace as well as an intermediate storage.

    Nachdem das Vorband z. B. in der oberen Wickeleinrichtung der Cremonabox" aufgewickelt worden ist, wird der Ofenkörper geschwenkt und das Vorbandende, das jetzt zum Vorbandkopf wird, wird einer Schere zugeführt, um den Kopfschrott abzutrennen. Das Vorband wird dann weiter durch eine Schweißmaschine (die erst beim zweiten Vorband notwendig wird) und einen Vorbandspeicher geführt, an dessen Ende eine weitere Entzunderungseinrichtung steht, um nochmals zwischenzeitlich entstandenen Zunder zu entfernen.After the opening act z. B. in the upper winding device Cremonabox "has been wound up, the furnace body is pivoted and the pre-strip end, which now becomes the pre-strip head, is fed to a pair of scissors in order to separate the head scrap. The pre-strip is then further passed through a welding machine (which is only necessary for the second pre-strip) and a pre-strip store led, at the end of another descaling device to remove any scale that has arisen in the meantime.

    Unmittelbar hinter der Entzunderungseinrichtung befindet sich eine Fertigstaffel, die das Band auf eine Dicke reduziert, die einen sicheren Transport des Bandes über den Auslaufrollgang bis zum Haspel gewährleistet. Vor dem Haspel ist eine Schnellschnittschere angeordnet, die die Bänder später beim Endloswalzen wieder zerteilt, um so die gewünschten Bundgrößen und Bundgewichte zu erzielen.Immediately behind the descaling device there is a finishing line, the the band is reduced to a thickness that ensures safe transport of the band over the Outfeed roller conveyor guaranteed up to the reel. There is one in front of the reel High-speed shear arranged the tapes again later in the continuous rolling divided to achieve the desired waist sizes and weights.

    Erfindungsgemäß ist vorgesehen, daß das Zusammenschweißen der geschopften Vorbänder im Stillstand der Vorbänder erfolgt. Dazu wird, nachdem das Band vom Haspel gefaßt ist, im Vorbandspeicher vor der Fertigstraße die notwendige Vorbandlänge gespeichert, die für ein im Stillstand durchgeführtes Anschweißen des zweiten Vorbandes an das erste Vorband notwendig ist Während also das erste Band in der Fertigstraße gewalzt wird, wird simultan in der Vorstraße das zweite Vorband gewalzt und im unteren Ofen der Cremonabox aufgewickelt. According to the invention it is provided that the welding together of the cropped Pre-tapes are carried out with the pre-tapes stationary. After the tape from Haspel is taken, the necessary in the pre-roll storage in front of the finishing train The pre-strip length is saved, which is necessary for welding the second opening act to the first opening act is necessary While the first If the strip is rolled in the finishing train, it becomes the second in the roughing train simultaneously The supporting strip is rolled and wound up in the lower oven of the Cremonabox.

    Das Vorband wird nach dem Kopfschrottschnitt mittels der Schweißmaschine an das Vorbandende des ersten Bandes angeschweißt. Zur gleichen Zeit leert sich der Vorbandspeicher vor der Fertigstraße, ohne das der Walzvorgang in der Fertigstraße unterbrochen werden muß. Der jetzt leere obere Ofen der Cremonabox schwenkt wieder zurück in Aufnahmeposition, um somit für das dritte Vorhand aufnahmebereit zu sein, das wiederum simultan zum Walzprozess des zweiten Bandes in der Fertigstraße erzeugt wird.After the scrap head cut, the supporting strip is attached to the The end of the first band welded on. At the same time, the Pre-strip storage in front of the finishing train without the rolling process in the finishing train must be interrupted. The now empty upper oven of the Cremonabox swings back in the position to be ready for the third forehand to be, which in turn simultaneously with the rolling process of the second strip in the Finishing line is generated.

    Sobald das Fertigband zwischen letztem aktivem Fertiggerüst und Haspel eingespannt ist, kann mittels der Anstellungen der Fertigstraße die Fertigbanddicke reduziert und die Walzgeschwindigkeit entsprechend angehoben werden. Auf diese Weise ist das Ziel zu erreichen, 0,5 mm dickes Warmband im austenitischen Temperaturniveau zu walzen.As soon as the finished belt between the last active finishing stand and reel is clamped, the finished strip thickness can be adjusted by means of the settings of the finishing train reduced and the rolling speed increased accordingly. To this The goal is to achieve 0.5 mm thick hot strip in austenitic Roll temperature level.

    Die Schnellschnittschere vor dem Haspel ermöglicht das endlose Band wieder zu teilen und eine gewünschte Bundgröße zu erzeugen. Während des Durchlaufs des zweiten Vorbandes durch die Fertigstraße wird wieder der Speicher vor der Fertigstraße gefüllt, um so die notwendige Zeit für den Anschweißvorgang des nächsten Vorbandes an das gerade gewalzte Vorhand sicher zu stellen. Dieser Vorgang läuft immer wieder im gleichen Rhythmus ab.The quick-cut shears in front of the reel enable the endless belt to be closed again divide and create a desired waist size. During the run of the second pre-production line through the finishing train, the store in front of the Finishing line filled, so the time required for the welding process of the the next opening to the just rolled forehand. This process always runs in the same rhythm.

    Vorzugsweise steht der zweite beheizte Vorbandspeicher unter Schutzgas und ist direkt vor der Fertigstraße angeordnet. Die Kapazität des Vorbandspeichers ist entsprechend der Auslaufgeschwindigkeit des Fertigbandes und der benötigten Zeit zum Verschweißen der Vorbandenden ausgelegt.The second heated pre-strip store is preferably under protective gas and is arranged directly in front of the finishing train. The capacity of the opening memory is according to the run-out speed of the finished strip and the time required designed to weld the leading ends.

    Wird der Prozeß aus verschiedenen Gründen beendet, sollte die Fertigbanddicke wieder in eine Größe gebracht werden, die ein problemloses Ausfädeln aus der Fertigstraße und einen sicheren Transport über den Auslaufrollgang möglich macht.If the process is ended for various reasons, the finished strip should be thick be brought back to a size that allows easy unthreading Finishing line and safe transport via the exit roller table.

    Mit der Erfindung wird erstmalig eine Anlage zur Herstellung von extrem dünnem Fertigband geschaffen, die mit wenigen Gerüsten, also geringen Investitionskosten, eine hohe Anlagenkapazität aufweist. With the invention for the first time a system for the production of extremely thin Finished strip created with few scaffolding, so low investment costs, has a high system capacity.

    Darüber hinaus kann sie ebenfalls ohne Kapazitätseinschränkungen für dickere Bandabmessungen (dicker als 1,2 mm) genutzt werden, wenn man die Schweißmaschine und den Zwischenspeicher vor der Fertigstraße nicht nutzt. Deshalb wird nach einem anderen Merkmal der Erfindung vorgeschlagen, daß das Vorband in der Tandem Steckel-Gerüstgruppe in 6 Stichen bis auf eine Dicke von beispielsweise 3 mm gewalzt wird.In addition, it can also be used without capacity restrictions for thicker ones Belt dimensions (thicker than 1.2 mm) can be used when the Welding machine and the temporary storage in front of the finishing train. Therefore, it is proposed according to another feature of the invention that Supporting tape in the tandem Steckel scaffolding group in 6 passes to a thickness of for example 3 mm is rolled.

    Die Gießmaschinenkapazität und die Walzkapazität der Vor- und Fertigstraße werden so ausgelegt ist, daß ein kontinuierlicher Betrieb gewährleistet ist und die gewünschten thermischen und geometrischen Anforderungen an das Fertigband erfüllt werden.The casting machine capacity and the rolling capacity of the roughing and finishing train will be is designed to ensure continuous operation and the desired thermal and geometric requirements for the finished strip be fulfilled.

    Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben.An embodiment of the invention is shown in the drawing and will described below.

    In der einzigen Zeichnungsfigur 1 ist mit 1 und 1' ein Pfannendrehturm bezeichnet, der der Stranggießanlage 2 und 2

    Figure 00050001
    vorgeordnet ist und diese mit Gießschmelze versorgt. Die als Bogenstranggießanlage mit horizontalem Auslauf ausgebildete Stranggießanlage weist an ihrem auslaufseitigen Ende eine Brennschneidmaschine oder eine Schere 3 und 3 auf, mit deren Hilfe der kontinuierlich gegossene Vormaterialstrang in Brammen unterteilt wird. Diese Brammen laufen in einen Rollenherdofen 4 und 4 ein, wo sie über ihren Querschnitt auf gleichmäßige Temperatur gebracht werden. Mit der Fähre 5 werden die Brammen aus dem Anlagenabschnitt 1 bis 4 in die Walzwerkslinie transportiert. Auf diese Weise werden die 2 Gießmaschinen mit dem Walzwerk verbunden. Nach dem Durchlauf durch den Rollenherdofen wird die Bramme in einem Zunderwäscher 6 entzundert und dann der Tandem-Steckel-Gerüstgruppe 7 zugeführt. Nach dem ersten Durchlauf durch diese Gerüstgruppe wird das Material in dem auslaufseitigen Wickelofen 8 aufgewickelt, der -wie beansprucht- auch gleichzeitig der als Zwischenspeicher für das Vorband dienende Cremonaofen" sein kann, um anschließend wieder im Reversierbetrieb in der Gerüstgruppe 7 weiter reduziert zu werden. Nach diesem Durchlauf wird das Material im einlaufseitigen Wickelofen 9 aufgewickelt. Der dritte Durchlauf durch die Gerüstgruppe 7 reduziert das Material zu der gewünschten Vorbanddicke. Dieses Vorband wird in der Wickeleinrichtung 10 aufgenommen und zwischengespeichert. die aus 2 übereinander liegenden Öfen besteht, welche mit je einem Wickeldorn zur Aufnahme des Vorbandes bestückt sind. Die Gehäuse dieser Öfen sind so ausgebildet, daß sie schwenkbar sind, um das Vorbandende in die richtige Position für die nachfolgenden Arbeitsschritte zu bringen. Die Öfen dienen als Zwischenspeicher, um kurze Ablaufunregelmäßigkeiten in den nachfolgenden Anlagenabschnitten zu kompensieren und werden ggf. auch als Steckelöfen" bei den ersten Reversierstichen verwendet. In letzteren Fall entfällt der auslaufseitige Wickelofen 8.In the single drawing figure 1, 1 and 1 'denote a ladle turret, that of the continuous casting plant 2 and 2
    Figure 00050001
    is upstream and supplied with molten casting. The continuous casting installation, which is designed as a sheet continuous casting installation with a horizontal outlet, has a flame cutting machine or a pair of scissors 3 and 3 at its outlet end with which the continuously cast strand of raw material is divided into slabs. These slabs run into a roller hearth furnace 4 and 4 a where they are brought to a uniform temperature across their cross-section. With the ferry 5, the slabs from system section 1 to 4 transported to the rolling mill line. In this way the 2 casting machines are connected to the rolling mill. After passing through the roller hearth furnace, the slab is descaled in a scale washer 6 and then fed to the tandem-Steckel stand group 7. After the first pass through this group of stands, the material is wound up in the outlet-side winding furnace 8, which, as claimed, also serves as the intermediate storage for the preliminary strip, as claimed Cremonaofen ", in order to subsequently be reduced again in the reversing mode in the stand group 7. After this pass, the material is wound up in the entry-side winding furnace 9. The third pass through the stand group 7 reduces the material to the desired pre-strip thickness of the winding device 10 and temporarily stored, which consists of two superimposed furnaces, each of which is equipped with a winding mandrel for receiving the pre-strip The ovens serve as temporary storage to compensate for short process irregularities in the subsequent sections of the plant and are also used as Steckelöfen "used in the first reversing stitches. In the latter case, the winding furnace 8 on the outlet side is omitted.

    Aus der Wickeleinrichtung wird das Vorband abwechselnd einer Schere 11 zugeführt, die den Kopf des Vorbandes schopft. Das geschopfte Vorband durchläuft eine Schweißmaschine 12, wo es an das ebenfalls geschopfte Ende des vorherigen Vorbandes angeschweißt wird, einen Schlingenturm 13 und einen Zunderwäscher 14, um dann in einer mehrgerüstigen Fertigstraße 15 zum gewünschten Fertigband gewalzt zu werden.The sliver is alternately fed to a pair of scissors 11 from the winding device, which scoops the head of the opening act. The scooped supporting tape goes through one Welding machine 12, where it is also the scooped end of the previous one Pre-strip is welded, a loop tower 13 and a scale washer 14, then in a multi-stand finishing train 15 to the desired finished strip to be rolled.

    Über den Auslaufrollgang 16 mit integrierter Bandkühlung 17 läuft das Band durch eine Schnellschnittschere 18 zu einer Haspeleinrichtung 19, wo es aufgewickelt wird. Bundaustragewagen 20 und weitere Einrichtungen, wie Bindemaschine 21, Waage 22, und Markiereinrichtung 23 folgen. Das fertige Bund wird mittels Bundtransporteinrichtung 24 ins Bundlager 25 transportiert und gelagert.The belt runs through the outlet roller table 16 with integrated belt cooling 17 a quick cut shear 18 to a reel device 19 where it is wound up. Bundaustragewagen 20 and other facilities such as binding machine 21, scales 22, and marking device 23 follow. The finished bundle is by means of Bundle transport device 24 transported and stored in the bundle bearing 25.

    Claims (6)

    Verfahren zur Herstellung von dünnem warmgewalzten Stahlband mit einer Enddicke < 1 mm aus bandförmig gegossenem Vormaterial in aufeinander folgenden Schritten, bei dem das die Gießanlage verlassende erstarrte Vormaterial in Vorbandlängen aufgeteilt und in einem Durchlaufofen auf Walztemperatur erwärmt wird, um es in einer reversierend betriebenen Tandem-Steckel-Gerüstgruppe sowie anschließender Fertigstraße auszuwalzen,
    dadurch gekennzeichnet, a. daß das ≦ 90 mm dick gegossene Vormaterial nach dem Entzundern der Oberfläche auf der Tandem-Steckel-Gerüstgruppe in 6 Stichen gewalzt wird, wobei das Vormaterial nach dem ersten und zweiten Durchlauf in einlauf- und auslaufseitig der Tandem-Steckel-Gerüstgruppe angeordneten Wickelöfen auf- und abgewickelt wird, b. daß das Vorband nach dem dritten Durchlauf durch die Steckel-Walzgerüste in einer als Zwischenspeicher für das Vorband dienenden auslaufseitigen Wickeleinrichtung mit zwei übereinanderliegenden Öfen aufgehaspelt wird, c. daß gleichzeitig mit dem Aufhaspeln des ersten Bundes ein zweites Bund aus dem Zwischenspeicher der auslaufseitigen Wickeleinrichtung abgewickelt wird, dessen geschopftes vorderes Ende an das geschopfte hintere Ende des bereits abgewickelten Vorbandes angeschweißt wird, d. daß das zu einem endlosen Band zusammengeschweißte Vorband durch einen zweiten Vorbandspeicher hindurch der Fertigstraße zugeführt wird, die das Vorhand auf die gewünschte Fertigbanddicke reduziert.     Process for the production of thin hot-rolled steel strip with a final thickness <1 mm from strip-shaped cast material in successive steps, in which the solidified material leaving the casting plant is divided into strip lengths and heated to rolling temperature in a continuous furnace in order to use it in a reversing tandem Roll out the Steckel scaffolding group and the subsequent finishing train,
    characterized, a. that the ≦ 90 mm thick cast material is rolled in 6 passes after descaling the surface on the tandem-Steckel stand group, whereby after the first and second pass the feed material is placed in winding furnaces arranged on the inlet and outlet side of the tandem-Steckel stand group. and is handled, b. that after the third pass through the Steckel roll stands, the pre-strip is wound up in an outlet-side winding device, which serves as a buffer for the pre-strip, with two superimposed furnaces, c. that at the same time as the first coil is being wound up, a second coil is unwound from the intermediate store of the winding device on the outlet side, the front end of which is scooped and welded to the rear end of the pre-strip which has already been unwound, d. that the pre-strip welded together to form an endless strip is fed through a second pre-strip store to the finishing train, which reduces the forehand to the desired finished strip thickness.     Verfahren zur Herstellung von dünnem warmgewalztem Stahlband nach Anspruch 1,
    dadurch gekennzeichnet, daß als auslaufseitig angeordneter Wickelofen gemäß Merkmal a. die als Zwischenspeicher für das Vorband dienende auslaufseitigen Wickeleinrichtung gemäß Merkmal b.verwendet wird     A method of manufacturing thin hot-rolled steel strip according to claim 1,
    characterized in that as a winding furnace arranged on the outlet side according to feature a. the outlet-side winding device serving as a buffer for the preliminary strip is used in accordance with feature b         Verfahren zur Herstellung von dünnem warmgewalztem Stahlband nach Anspruch 1 und 2,
    dadurch gekennzeichnet, daß das Zusammenschweißen der geschopften Vorbänder im Stillstand erfolgt.    A method for producing thin hot-rolled steel strip according to claims 1 and 2,
    characterized in that the cropping of the cropped pre-strips takes place at a standstill.         Verfahren zur Herstellung von dünnem warmgewalztem Stahlband nach Anspruch 1 bis 3,
    dadurch gekennzeichnet, daß der zweite beheizte Vorbandspeicher unter Schutzgas steht und direkt vor der Fertigstraße angeordnet ist, und daß die Kapazität des Vorbandspeichers entsprechend der Auslaufgeschwindigkeit des Fertigbandes und der benötigten Zeit zum Verschweißen der Vorbandenden ausgelegt ist    A method for producing thin hot-rolled steel strip according to claims 1 to 3,
    characterized in that the second heated pre-strip storage is under protective gas and is arranged directly in front of the finishing train, and that the capacity of the pre-strip storage is designed according to the run-out speed of the finished strip and the time required for welding the pre-strip ends         Verfahren zur Herstellung von warmgewalztem Stahlband nach Anspruch 1 bis 4,
    dadurch gekennzeichnet, daß das Vorhand in der Tandem Steckel-Gerüstgruppe in 6 Stichen bis auf eine Dicke von 3 mm gewalzt wird.    A process for producing hot-rolled steel strip according to claims 1 to 4,
    characterized in that the forehand in the tandem Steckel stand group is rolled in 6 passes to a thickness of 3 mm.         Verfahren zur Herstellung von dünnem warmgewalztem Stahlband nach Anspruch 1 bis 5,
    dadurch gekennzeichnet, daß die Gießmaschinenkapazität und die Walzkapazität der Vor- und Fertigstraße so ausgelegt daß ein kontinuierlicher Betrieb gewährleistet ist und die gewünschten thermischen und geometrischen Anforderungen an das Fertigband erfüllt werden.    A method for producing thin hot-rolled steel strip according to claims 1 to 5,
    characterized in that the casting machine capacity and the rolling capacity of the roughing and finishing train are designed so that continuous operation is ensured and the desired thermal and geometric requirements for the finishing strip are met.
    EP98250221A 1997-07-23 1998-06-18 Method for producing hot strip of 0.5 mm thickness in a hot strip mill Expired - Lifetime EP0893168B1 (en)

    Applications Claiming Priority (4)

    Application Number Priority Date Filing Date Title
    DE19732538 1997-07-23
    DE1997132538 DE19732538A1 (en) 1997-07-23 1997-07-23 Method for producing hot rolled thin strip
    DE19749716 1997-10-31
    DE1997149716 DE19749716A1 (en) 1997-10-31 1997-10-31 Method for producing hot rolled thin strip

    Publications (3)

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    EP0893168A2 true EP0893168A2 (en) 1999-01-27
    EP0893168A3 EP0893168A3 (en) 1999-03-31
    EP0893168B1 EP0893168B1 (en) 2002-05-22

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    TWI288676B (en) * 2002-07-06 2007-10-21 Sms Demag Ag Method and casting roller plant for the semi-endless or endless rolling by casting of a metal in particular a steel strip which may be transversely cut as required after solidification
    CN101293258B (en) * 2007-04-25 2010-12-01 宝山钢铁股份有限公司 Process for manufacturing hot rolled steel strips by continuous casting and rolling middle bar strip
    CN101391264B (en) * 2007-09-19 2011-02-02 中冶赛迪工程技术股份有限公司 Technique method of thin middle plate continuous casting and rolling production
    DE102010010156A1 (en) * 2010-03-04 2011-09-08 Kirchhoff Automotive Deutschland Gmbh Process for producing a molded part with at least two structural areas of different ductility
    CN104550237B (en) * 2014-11-28 2016-09-21 中冶南方工程技术有限公司 For producing the continuous casting-Direct Rolling device and method of Bar Wire Product and section bar
    CN112974519B (en) * 2021-03-31 2024-06-14 武钢集团昆明钢铁股份有限公司 Economical welding endless rolled bar production line process arrangement and production method

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    FR2225223A1 (en) * 1973-04-10 1974-11-08 Nippon Kokan Kk Program-controlled continuous cold-rolled strip - with variable storage unit synchronised with uncoiling and rolling speeds
    US5121873A (en) * 1990-06-06 1992-06-16 Hitachi Ltd. Method of and apparatus for joining hot materials to be rolled to each other as well as continuous hot rolling method and system
    IT1244295B (en) * 1990-07-09 1994-07-08 Giovanni Arvedi PROCESS AND PLANT FOR THE OBTAINING OF WRAPPED STEEL BELTS, WITH CHARACTERISTICS OF COLD ROLLED PRODUCTS OBTAINED DIRECTLY IN HOT ROLLING LINE
    US5540074A (en) * 1994-12-07 1996-07-30 Ipsco Enterprises Inc. Unitary assembly of peripheral devices for use with steckel mill
    DE19512953A1 (en) * 1995-03-28 1996-10-02 Mannesmann Ag Method and device for producing hot-rolled steel strip
    AT403169B (en) * 1995-04-13 1997-11-25 Voest Alpine Ind Anlagen REEL OVEN FOR A HOT BAND
    DE19514475A1 (en) * 1995-04-19 1996-10-24 Schloemann Siemag Ag Steckel rolling mill
    NL1000693C2 (en) * 1995-06-29 1996-12-31 Hoogovens Staal Bv Device for manufacturing a steel strap.
    US5743125A (en) * 1995-09-06 1998-04-28 Sms Schloemann-Siemag Aktiengesellschaft Hot strip production plant for rolling thin rolled strip
    DE19538341A1 (en) * 1995-09-06 1997-03-13 Schloemann Siemag Ag Hot strip production line for rolling thin rolled strip

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    EP0893168A3 (en) 1999-03-31
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    JPH1177111A (en) 1999-03-23
    EP0893168B1 (en) 2002-05-22

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