EP0919296B1 - Adaption of hot rolling lines for rolling thin strips - Google Patents

Adaption of hot rolling lines for rolling thin strips Download PDF

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Publication number
EP0919296B1
EP0919296B1 EP97120406A EP97120406A EP0919296B1 EP 0919296 B1 EP0919296 B1 EP 0919296B1 EP 97120406 A EP97120406 A EP 97120406A EP 97120406 A EP97120406 A EP 97120406A EP 0919296 B1 EP0919296 B1 EP 0919296B1
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EP
European Patent Office
Prior art keywords
rolling
strip
hot strip
hot
oven
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EP97120406A
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German (de)
French (fr)
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EP0919296A1 (en
Inventor
Dieter Rosenthal
Günter Dr. Kneppe
Dieter Ladda
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SMS Siemag AG
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SMS Demag AG
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Priority to EP97120406A priority Critical patent/EP0919296B1/en
Priority to ES97120406T priority patent/ES2196240T3/en
Priority to AT97120406T priority patent/ATE235972T1/en
Priority to DE59709709T priority patent/DE59709709D1/en
Priority to US09/196,379 priority patent/US6122950A/en
Publication of EP0919296A1 publication Critical patent/EP0919296A1/en
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Publication of EP0919296B1 publication Critical patent/EP0919296B1/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • 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
    • B21B1/24—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 continuous or semi-continuous process
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/142—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving along a vertical axis
    • 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
    • B21B1/24—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 continuous or semi-continuous process
    • B21B1/26—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 continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • 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
    • B21B2201/00—Special rolling modes
    • B21B2201/02—Austenitic rolling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B2009/3094—Means to store a part of the charge in the furnace

Definitions

  • the invention relates to a hot strip mill with a Walking beam furnace, a reversing scaffold downstream of this and if necessary. Scissors and / or descaling devices, and a following Hot strip finishing mill for manufacturing thin, austenitic rolled Hot strip.
  • Such hot strip mills are in operation in large numbers. With These hot strip mills can be used for hot strips with a thickness of Roll 1.5 mm, at best 1.2 mm. This is where these hot strip mills meet to its limits. A further reduction in the strip thickness is not possible with these roads. There are two reasons: On the one hand, the mean temperature of the strip at the exit of the last stand of the hot strip finishing mill approx. 890 ° C to 930 ° C do not fall below to guarantee an austenitic rolling. On the other hand, the speed at the exit of the last scaffolding is allowed do not exceed the hot strip finishing train approx. 11.0 to 12.5 m / s, otherwise the hot strip on the outlet roller table is not can be guided more properly and then reeled. In addition, the threading in the hot strip mill at such high speeds is problematic.
  • the slabs are cut in several in the roughing mill of a hot strip mill Roll stitches rolled out to a supporting strip. It forms over the Length of the supporting strip made of a temperature wedge, which is essentially by the decrease distribution during rolling and the rolling speeds being affected.
  • the hot strip finishing mill is regularly turned into the hot strip finishing mill introduced, which at its edges a Temperature level at the lower limit of that for the first roll stand the hot strip finishing line has the necessary temperature, the However, the mean belt temperature is correspondingly too high.
  • the strip center temperature as mentioned above, be at least approx. 890 ° C to 930 ° C.
  • JP 54 120 267 A is already a continuously operating hot strip mill known in the between a roughing mill and a finishing train a compensating furnace is provided. According to this document will not be an existing rolling mill was used. Rather, it is a completely new construction, in which the compensating furnace also for rolling Strips with thicknesses above 1.2 mm are always included in the rolling process is.
  • EP 531 755 A1 also discloses a rolling mill for producing Hot wide strip in which furnaces between a roughing train and a finishing train are provided.
  • the concept proposed here is not suitable for in an existing hot strip mill to be realized as the rolling mill builds very long due to the stoves.
  • GB 2 301 660 A and DE 704 660 C disclose stoves. The subsequent one Installation of these furnaces for the purpose of equalizing the temperature of the rolling stock and for the subsequent rolling out of the rolling stock under 1.2 mm is not suggested.
  • the invention is based, hot strip mills by means of the task which can be rolled down to thicknesses of 1.5 to 1.2 mm or to retrofit that the rolled strip thickness is reduced to less than 1 mm can, the retrofit should be as inexpensive as possible.
  • the temperature in the edge area of the Supporting tape, from the beginning or end of the tape and any existing skidmarks compensate so that a support strip is produced with a homogeneous temperature
  • the temperature of the sliver leaving the equalizing furnace to the lowest input temperature required for the hot strip finishing train can be.
  • the pre-strip temperature is constant over length and width for absolutely stationary process conditions in the finishing train to care. This creates the best possible conditions for rolling of tapes with minimal final tape thicknesses.
  • induction heaters are assigned to the compensating furnace, then specifically colder areas of the belt heated up or the temperature level be influenced overall. Will the Compensating furnace arranged parallel to each other, so this can by simple parallel horizontal or vertical shifting brought to the rolling line for loading or unloading in the rolling line become.
  • this allows the support strip to enter the rolling line in one cycle be involved, with the actual heating device in parallel is arranged to the rolling line.
  • the compensating furnace is designed as a roller hearth furnace is to make sure there are no skidmarks can.
  • the compensation furnace can be removed from the Extend the rolling line and a conventional roller table in its place retract.
  • Figure 1 shows a walking beam furnace 1, which in the rolling direction 2 Reversing frame 3 connects.
  • the feed, z. B. blocks, heated, and from the furnace 1 to the reversing frame 3 given where it was rolled to support strip in several passes becomes.
  • Figure 2 shows between the reversing stand 3 and the hot strip finishing train 6 a compensating furnace 7.
  • the compensating furnace 7 has several Recording places 8 to 8 '' ''. These are in the direction of arrow 9 displaceable, the arrangement shown for both in a essentially horizontal as well as for a substantially vertical arranged compensation furnace 7 should stand.
  • an induction heater 10 is shown in front of the equalizing furnace 7.
  • FIG. 3 shows the furnace 1, the reversing stand 3 and the hot strip finishing train 6. Furthermore, two ferries 11 and 12 can be seen, between which the consecutively arranged recording spaces 13 to 13 '' ' of the compensating furnace 7 'are arranged.
  • the support is brought back to ferry 11 and here from the Move the rolling line out into the line of the receiving positions 13 to 13 '' '.
  • the pre-strips are re-formed and after pushed into the ferry 12, by means of which they again in the Rolling line and from there to hot strip finishing line 6 become.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Medicines Containing Plant Substances (AREA)
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Abstract

A temperature equalization furnace (7) between the reversing roll stand (3) and the finish hot rolling section (6) reduces the maximum velocity and/or further reduces the strip thickness. The number of places (8) for the strip is chosen so that the total time for each batch in the furnace is a multiple of its rolling time in the hot rolling section.

Description

Die Erfindung betrifft eine Warmbandstraße mit einem Hubbalkenofen, einem diesem nachgeordneten Reversiergerüst und ggfs. Scheren und/oder Entzunderungsvorrichtungen, sowie einer folgenden Warmbandfertigstraße zum Fertigen dünnen, austenitisch gewalzten Warmbandes.The invention relates to a hot strip mill with a Walking beam furnace, a reversing scaffold downstream of this and if necessary. Scissors and / or descaling devices, and a following Hot strip finishing mill for manufacturing thin, austenitic rolled Hot strip.

Derartige Warmbandstraßen sind in großer Anzahl in Betrieb. Mit diesen Warmbandstraßen lassen sich Warmbänder mit einer Dicke von 1,5 mm, bestenfalls 1,2 mm, walzen. Hier stoßen diese Warmbandstraßen an ihre Grenzen. Eine weitere Absenkung der Walzbanddicke ist mit diesen Straßen nicht möglich. Dafür gibt es zwei Gründe: Einerseits soll die mittlere Temperatur des Bandes am Ausgang des letzten Gerüstes der Warmbandfertigstraße ca. 890° C bis 930 ° C nicht unterschreiten, um ein austenitisches Walzen zu gewährleisten. Andererseits darf die Geschwindigkeit am Ausgang des letzten Gerüstes der Warmbandfertigstraße ca. 11,0 bis 12,5 m/s nicht übersteigen, da ansonsten das Warmband auf dem Auslauf-Rollgang nicht mehr einwandfrei geführt und anschließend gehaspelt werden kann. Hinzu kommt, daß auch das Einfädeln in der Warmbandstraße bei derart hohen Geschwindigkeiten problematisch ist.Such hot strip mills are in operation in large numbers. With These hot strip mills can be used for hot strips with a thickness of Roll 1.5 mm, at best 1.2 mm. This is where these hot strip mills meet to its limits. A further reduction in the strip thickness is not possible with these roads. There are two reasons: On the one hand, the mean temperature of the strip at the exit of the last stand of the hot strip finishing mill approx. 890 ° C to 930 ° C do not fall below to guarantee an austenitic rolling. On the other hand, the speed at the exit of the last scaffolding is allowed do not exceed the hot strip finishing train approx. 11.0 to 12.5 m / s, otherwise the hot strip on the outlet roller table is not can be guided more properly and then reeled. In addition, the threading in the hot strip mill at such high speeds is problematic.

In der Vorstraße einer Warmbandstraße werden die Brammen in mehreren Walzstichen zu einem Vorband ausgewalzt. Dabei bildet sich über die Länge des Vorbandes ein Temperaturkeil aus, der wesentlich durch die Abnahmeverteilung während des Walzens und die Walzgeschwindigkeiten beeinflußt wird.The slabs are cut in several in the roughing mill of a hot strip mill Roll stitches rolled out to a supporting strip. It forms over the Length of the supporting strip made of a temperature wedge, which is essentially by the decrease distribution during rolling and the rolling speeds being affected.

Zusätzlich stellt sich während des Walzvorgangs auch eine Verteilung der Bandtemeperatur über die Breite des Vorbandes ein. Dies resultiert aus größeren Abstrahlungsverlusten an den Bandkanten und durch die Kühlwirkung von Entzunderungswasser. Die Bandkanten können also wesentlich kühler sein als die Bandmitte, wobei Temperaturunterschiede zwischen Bandmitte und Bandkante in der Größenordnung von 75° C bis 125° C vorkommen können.In addition, a distribution also arises during the rolling process the strip temperature across the width of the preliminary strip. This results from larger radiation losses at the band edges and through the cooling effect of descaling water. The band edges can be significantly cooler than the center of the belt, with temperature differences between belt center and belt edge in the order of magnitude 75 ° C to 125 ° C can occur.

Damit wird regelmäßig bei den Warmwalzstraßen Vorband in die Warmbandfertigstraße eingeführt, welches an seinen Rändern zwar ein Temperaturniveau an der unteres Grenze der für das erste Walzgerüst der Warmbandfertigstraße notwendigen Temperatur aufweist, dessen Bandmittentemperatur jedoch entsprechend zu hoch liegt. Am Ausgang des letzten Gerüstes muß die Bandmittentemperatur, wie oben erwähnt, mindestens ca. 890° C bis 930 °C betragen.This means that on the hot rolling mills, pre-strip is regularly turned into the hot strip finishing mill introduced, which at its edges a Temperature level at the lower limit of that for the first roll stand the hot strip finishing line has the necessary temperature, the However, the mean belt temperature is correspondingly too high. At the exit of the last stand, the strip center temperature, as mentioned above, be at least approx. 890 ° C to 930 ° C.

Hinzu kommt, daß im Hubbalkenofen Bereiche des Einsatzgutes, welche auf dem Balken aufliegen, stärker gekühlt werden als die übrigen Bereich des Einsatzgutes, so daß durch die quer zur Walzrichtung verlaufenden Hubbalken im Einsatzgut quer zur Walzrichtung verlaufende kältere Stellen des Bandes entstehen. Diese sogenannten "skidmarks" müssen ebenfalls beim Eingang in die Warmbandfertigstraße von der Temperatur her berücksichtigt werden, so daß ggfs. die Vorbandmittentemperatur im Bereich außerhalb der skidmarks noch erheblich höher liegt als die Bandkantentemperatur im Bereich der skidmarks.In addition, areas of the material in the walking beam furnace, which lie on the beam, be cooled more than the others Area of the input material, so that through the transverse to the rolling direction walking beam running in the feed material transverse to the rolling direction colder areas of the tape arise. These so-called "Skidmarks" must also be entered at the hot strip finishing line be taken into account from the temperature, so that if necessary. the opening temperature in the area outside the skidmarks is still is considerably higher than the strip edge temperature in the range of skidmarks.

Während des Walzens in der Fertigstraße verbleibt der noch nicht dem Walzprozess zugeführte Rest des Vorbandes auf dem Rollgang vor der Fertigstraße. Damit befindet sich der hintere Teil des Vorbandes beim Eintritt in den Walzprozess länger auf dem Rollgang und ist stärker abgekühlt als der Bandkopf. Um trotz dieser stetig abnehmenden Einlauftemperatur eine konstante Auslauftemperatur der Fertigstraße sicherzustellen, wird die Walzgeschwindigkeit während des Walzens stetig erhöht. Mit einem solchen Temperatur-speed-up wird der Einfluß abnehmender Einlauftemperaturen kompensiert.It does not remain during the rolling in the finishing train rest of the pre-strip fed to the rolling process on the roller table the finishing train. This is the back part of the opening act longer on the roller table when entering the rolling process and is cooled more than the tape head. To despite this steadily decreasing Inlet temperature a constant outlet temperature of the finishing train ensure the rolling speed during the Rolling steadily increased. With such a temperature speed-up the influence of decreasing inlet temperatures is compensated.

Zusammenfassend ist damit der Walzprozess in einer konventionellen Fertigstraße durch nicht konstante Bandtemperaturen wie folgt gekennzeichnet:

  • a) nicht konstante Vorbandtemperatur über die Bandlänge
  • b) kalte Stellen (skidmarks)
  • c) nicht konstante Vorbandtemperaturen über die Bandbreite
  • d) stärkeres Abkühlen des Vorbandendes im Vergleich zum Vorbandkopf während des Walzens in der Fertigstraße
    • In summary, the rolling process in a conventional finishing train is characterized by non-constant strip temperatures as follows:
  • a) not constant pre-strip temperature over the strip length
  • b) cold spots (skidmarks)
  • c) not constant pre-strip temperatures over the bandwidth
  • d) greater cooling of the end of the sliver compared to the sliver head during rolling in the finishing train

    • Aus der JP 54 120 267 A ist bereits ein kontinuierlich arbeitendes Warmbandwalzwerk bekannt, bei dem zwischen einem Vorwalzgerüst und einer Fertigstraße ein Ausgleichsofen vorgesehen ist. Nach dieser Entgegenhaltung wird nicht auf eine bestehende Walzstraße zurückgegriffen. Es handelt sich vielmehr um eine komplette Neukonstruktion, bei welcher der Ausgleichsofen auch zum Walzen von Bändern mit Dicken oberhalb von 1,2 mm stets in den Walzprozeß eingeschlossen ist.JP 54 120 267 A is already a continuously operating hot strip mill known in the between a roughing mill and a finishing train a compensating furnace is provided. According to this document will not be an existing rolling mill was used. Rather, it is a completely new construction, in which the compensating furnace also for rolling Strips with thicknesses above 1.2 mm are always included in the rolling process is.

    Die EP 531 755 A1 offenbart ebenfalls eine Walzstraße zur Erzeugung von Warmbreitband, bei der zwischen einer Vorstraße und einer Fertigstraße Öfen vorgesehen sind. Das hier vorgeschlagene Konzept eignet sich jedoch nicht, um in einer bestehenden Warmbandstraße verwirklicht zu werden, da die Walzstraße durch die Öfen sehr lang baut.EP 531 755 A1 also discloses a rolling mill for producing Hot wide strip in which furnaces between a roughing train and a finishing train are provided. However, the concept proposed here is not suitable for in an existing hot strip mill to be realized as the rolling mill builds very long due to the stoves.

    Aus der DE 40 17 928 A1 sind Speicheröfen bekannt, die dazu dienen, aus einer Stranggießanlage austretendes Vormaterial aufzunehmen, wenn die nachgeschaltete Walzanlage abgeschaltet ist, die Stranggießanlage jedoch noch weiterhin arbeitet. Das Nachrüsten einer bestehenden Warmbandanlage wird hier nicht vorgeschlagen. Storage furnaces are known from DE 40 17 928 A1, which are used to produce a Continuous caster to record emerging material when the downstream Rolling mill is switched off, but the continuous caster continues is working. The retrofitting of an existing hot strip system is not here proposed.

    Die GB 2 301 660 A sowie die DE 704 660 C offenbaren Öfen. Der nachträgliche Einbau dieser Öfen zum Zwecke der Temperaturvergleichmäßigung des Walzgutes und zum anschließenden Auswalzen des Walzgutes unter 1,2 mm ist nicht nahegelegt.GB 2 301 660 A and DE 704 660 C disclose stoves. The subsequent one Installation of these furnaces for the purpose of equalizing the temperature of the rolling stock and for the subsequent rolling out of the rolling stock under 1.2 mm is not suggested.

    Der Erfindung liegt die Aufgabe zugrunde, Warmbandstraßen, mittels derer Band auf Dicken von 1,5 bis 1,2 mm herunter gewalzt werden kann so umzubauen bzw. nachzurüsten, daß die Walzbanddicke unter 1 mm abgesenkt werden kann, wobei die Nachrüstung möglichst kostengünstig ausfallen soll.The invention is based, hot strip mills by means of the task which can be rolled down to thicknesses of 1.5 to 1.2 mm or to retrofit that the rolled strip thickness is reduced to less than 1 mm can, the retrofit should be as inexpensive as possible.

    Zur Lösung der Aufgabe wird vorgeschlagen, daß ausgehend vom Stand der Technik nach Oberbegriff von Anspruch 1, zwischen dem Reversiergerüst und der Warmbandfertigstraße ein aus der Walzlinie ausfahrbarer Ausgleichsofen vorgesehen wird, der durch eine Anzahl von Aufnahmeplätzen für ausgleichend beheizbare Bänder eine Gesamtheizzeit für jedes Vorband sichert, die ein mehrfaches der Walzzeit in der Warmbandfertigstraße beträgt.To solve the problem it is proposed that, based on the prior art according to the preamble of claim 1, between the reversing frame and the hot strip finishing train is provided with a leveling furnace that can be moved out of the rolling line a number of recording places for balancing heated tapes a total heating time for each supporting strip that secures a multiple of the rolling time in the Hot strip finishing line is.

    Mittels des Ausgleichsofens lassen sich die Temperaturen im Randbereich des Vorbandes, von Bandanfang bzw. Bandende und evtl. vorhandener skidmarks ausgleichen, so daß ein Vorband mit einer homogenen Temperatur erzeugt wird, wobei die Temperatur des den Ausgleichsofen verlassenden Vorbandes auf die niedrigste für die Warmbandfertigstraße notwendige Eingangstemperatur eingestellt werden kann. In jedem Fall wird die über Länge und Breite konstante Vorbandtemperatur für absolut stationäre Prozessbedindungen in der Fertigstraße sorgen. Damit werden bestmögliche Voraussetzungen für das Walzen von Bändern mit minimalen Endbanddicken geschaffen.The temperature in the edge area of the Supporting tape, from the beginning or end of the tape and any existing skidmarks compensate so that a support strip is produced with a homogeneous temperature, the temperature of the sliver leaving the equalizing furnace to the lowest input temperature required for the hot strip finishing train can be. In any case, the pre-strip temperature is constant over length and width for absolutely stationary process conditions in the finishing train to care. This creates the best possible conditions for rolling of tapes with minimal final tape thicknesses.

    Werden dem Ausgleichsofen Induktionsheizungen zugeordnet, so können gezielt kältere Bereiche des Bandes aufgeheizt bzw. das Temperaturniveau insgesamt beeinflußt werden. Werden Aufnahmeplätze des Ausgleichsofens zueinander parallel angeordnet, so können diese durch einfaches paralleles horizontales bzw. vertikales Verschieben zur Walzlinie zum Be- bzw. Entladen in die Walzlinie gebracht werden.If induction heaters are assigned to the compensating furnace, then specifically colder areas of the belt heated up or the temperature level be influenced overall. Will the Compensating furnace arranged parallel to each other, so this can by simple parallel horizontal or vertical shifting brought to the rolling line for loading or unloading in the rolling line become.

    Werden Fähren und hintereinander angeordnete Aufnahmeplätze vorgesehen, so kann das Vorband ggfs. in einem Kreislauf in die Walzlinie eingebunden sein, wobei die eigentlichen Heizvorrichtung parallel zur Walzlinie angeordnet ist.If ferries and consecutive reception spaces are provided, this allows the support strip to enter the rolling line in one cycle be involved, with the actual heating device in parallel is arranged to the rolling line.

    Von Vorteil ist, wenn der Ausgleichsofen als Rollenherdofen ausgebildet ist, um hier sicherzustellen, daß keine skidmarks entstehen können.It is advantageous if the compensating furnace is designed as a roller hearth furnace is to make sure there are no skidmarks can.

    Soll mit der Warmbandstraße Walzband in Dicken bis zu 1,5 bzw. 1,2 mm heruntergewalzt werden, so läßt sich der Ausgleichsofen aus der Walzlinie ausfahren und an seiner Stelle ein konventioneller Rollgang einfahren.Should be rolled with the hot strip mill in thicknesses up to 1.5 or 1.2 mm are rolled down, the compensation furnace can be removed from the Extend the rolling line and a conventional roller table in its place retract.

    Die Erfindung wird anhand einer Zeichnung näher erläutert. Dabei zeigen

    Figur 1
    einen Ausschnitt einer herkömmlichen, bestehenden Warmwalzstraße,
    Figur 2
    einen Ausschnitt der nachgerüsteten Walzstraße nach Figur 1 mit parallelen Aufnahmeplätzen die sowohl horizontal als auch vertikal zur Wahlzlinie angeordnet sein können, und
    Figur 3
    eine Walzstraße nach Figur 1 mit nachgerüstetem Ausgleichsofen mit hintereinander angeordneten Aufnahmeplätzen.
    The invention is explained in more detail with reference to a drawing. Show
    Figure 1
    a section of a conventional, existing hot rolling mill,
    Figure 2
    a section of the retrofitted rolling mill according to Figure 1 with parallel receiving locations that can be arranged both horizontally and vertically to the Wahlzlinie, and
    Figure 3
    a rolling mill according to Figure 1 with a retrofitted compensating furnace with consecutively arranged receiving places.

    Figur 1 zeigt einen Hubbalkenofen 1, dem sich in Walzrichtung 2 ein Reversiergerüst 3 anschließt. Im Hubbalkenofen 1 wird das Einsatzmaterial, z. B. Blöcke, aufgeheizt, und vom Ofen 1 an das Reversiergerüst 3 abgegeben, wo es in mehreren Stichen zu Vorband gewalzt wird.Figure 1 shows a walking beam furnace 1, which in the rolling direction 2 Reversing frame 3 connects. In the walking beam furnace 1, the feed, z. B. blocks, heated, and from the furnace 1 to the reversing frame 3 given where it was rolled to support strip in several passes becomes.

    Dem Reversiergerüst 3 schließt sich ggfs. eine Schere 4 und eine Entzunderungsvorrichtung 5 an. Darauffolgend ist eine mehr-gerüstige Warmbandfertigstraße 6 gezeigt.A pair of scissors 4 and one may close the reversing frame 3 Descaling device 5. Following is a multi-scaffold Hot strip finishing line 6 shown.

    Figur 2 zeigt zwischen dem Reversiergerüst 3 und der Warmbandfertigstraße 6 einen Ausgleichsofen 7. Der Ausgleichsofen 7 hat mehrere Aufnahmeplätze 8 bis 8''''. Diese sind in Richtung des Pfeiles 9 verschiebbar, wobei die gezeigte Anordnung sowohl für einen im wesentlichen horizontal als auch für einen im wesentlichen vertikal angeordneten Ausgleichsofen 7 stehen soll. Vor dem Ausgleichsofen 7 ist eine Induktionsheizung 10 dargestellt.Figure 2 shows between the reversing stand 3 and the hot strip finishing train 6 a compensating furnace 7. The compensating furnace 7 has several Recording places 8 to 8 '' ''. These are in the direction of arrow 9 displaceable, the arrangement shown for both in a essentially horizontal as well as for a substantially vertical arranged compensation furnace 7 should stand. In front of the equalizing furnace 7, an induction heater 10 is shown.

    Nachdem im Reversiergerüst 3 die vom Ofen 1 eingesetzten Blöcke auf Vorbanddicke heruntergewalzt worden sind, werden diese in den Ausgleichsofen 7 verbracht. Hier werden die Aufnahmeplätze 8 bis 8'''' nacheinander gefüllt und dabei schrittweise auf dem Bild in Richtung des Pfeiles 9 nach oben verschoben. Sind alle Aufnahmeplätze 8 bis 8'''', die nebeneinander oder aber übereinander liegen können, gefüllt, so werden diese komplett in Pfeilrichtung nach unten verschoben, so daß wieder der Aufnahmeplatz 8 in der Walzlinie liegt. Durch Einschieben eines neuen Vorbandes wird das auf dem Aufnahmeplatz 8 liegende, inzwischen temperaturausgeglichene Vorband in die Warmbandfertigstraße 6 geschoben. Dabei verbleibt das Ende des Vorbandes im Ausgleichsofen 7, so daß ein ungleichmäßiges Abkühlen nicht erfolgen kann. Die Aufnahmeplätze werden so verschoben, daß der Aufnahmeplatz 8' in die Walzlinie kommt und dann auch hier ein neues Vorband unter gleichzeitigen Ausschieben des in der Temperatur ausgeglichenen Vorbandes in den Ausgleichsofen 7 eingeführt wird.After in the reversing frame 3, the blocks used by the furnace 1 Roughing strip thickness have been rolled down, these are in the Equalization furnace 7 spent. Here the recording places 8 to 8 '' '' filled in succession and gradually in the picture in Moved upwards in the direction of arrow 9. Are all admission places 8 to 8 '' '', which are next to or on top of each other can be filled, so they are completely in the direction of the arrow shifted below, so that again the recording place 8 in the rolling line lies. By inserting a new supporting tape, this will be on the Recording place 8 lying, now temperature-balanced opening act pushed into the hot strip finishing line 6. The end remains of the opening strip in the equalizing furnace 7, so that an uneven Cooling cannot take place. The recording places are shifted so that the recording place 8 'comes into the rolling line and then also a new opening act while simultaneously pushing out the in the temperature balanced pre-strip in the compensating furnace 7 is introduced.

    Figur 3 zeigt den Ofen 1, das Reversiergerüst 3 und die Warmbandfertigstraße 6. Weiterhin sind zwei Fähren 11 und 12 zu sehen, zwischen denen die hintereinander angeordneten Aufnahmeplätze 13 bis 13''' des Ausgleichsofens 7' angeordnet sind.FIG. 3 shows the furnace 1, the reversing stand 3 and the hot strip finishing train 6. Furthermore, two ferries 11 and 12 can be seen, between which the consecutively arranged recording spaces 13 to 13 '' ' of the compensating furnace 7 'are arranged.

    Nachdem der aus dem Ofen 1 kommende Block im Reversiergerüst 3 auf die notwendige Vorbanddicke im Reversierbetrieb gewalzt worden ist, wird das Vorband zur Fähre 11 zurückverbracht und hier aus der Walzlinie heraus in die Linie der Aufnahmeplätze 13 bis 13''' verfahren. Nach erfolgter Homogenisierung werden die Vorbänder nach und nach in die Fähre 12 geschoben, mittels derer sie wieder in die Walzlinie und von da aus in die Warmbandfertigstraße 6 verbracht werden. After the block coming out of the furnace 1 in the reversing frame 3 the necessary pre-strip thickness has been rolled in reverse operation, the support is brought back to ferry 11 and here from the Move the rolling line out into the line of the receiving positions 13 to 13 '' '. After homogenization has been completed, the pre-strips are re-formed and after pushed into the ferry 12, by means of which they again in the Rolling line and from there to hot strip finishing line 6 become.

    BezugszeichenübersichtReference numeral Overview

    11
    Hubbalkenofenwalking beam furnace
    22
    Walzrichtungrolling direction
    33
    Reversiergerüstreversing
    44
    Scherescissors
    55
    Entzunderungsvorrichtungdescaling
    66
    WarmbandfertigstraßeHot strip finishing mill
    77
    Ausgleichsofensoaking furnace
    88th
    Aufnahmeplätzereceiving sites
    99
    Pfeilarrow
    1010
    Induktionsheizunginduction heating
    1111
    Fähreferry
    1212
    Fähreferry
    1313
    Aufnahmeplätzereceiving sites

    Claims (8)

    1. Hot strip rolling train with a rocker bar furnace (1), at least one reversing roll train (3) arranged downstream thereof and optionally cutters (4) and/or descaling devices (5), as well as a hot strip finishing train (6), which follows in the same rolling line, for finishing thin, austenitic rolled hot strip, characterised in that a compensating oven (7, 7') movable out of the rolling line is provided for reducing the maximum speed and/or for further reducing the rolled strip thickness between the reversing stand (3) and the hot strip finishing train (6) and secures, by a number of receiving positions (8 to 8""; 13 to 13"') for starting strips heatable for compensation, a total heating time, which is a multiple of the rolling time in the hot strip finishing train (6), for each starting strip.
    2. Hot rolling train according to claim 1, characterised in that at least one induction heating means (10) effective in presettable width regions of the starting strip is associated with the compensating oven (7, 7').
    3. Hot rolling train according to claim 2, characterised in that the induction heating means (10) is arranged upstream of the compensating oven (7, 7') or integrated in the inlet thereof.
    4. Hot strip rolling train according to one of claims 1 to 3, characterised in that the receiving positions (8 to 8'''') of the compensating oven (7) are arranged parallel to one another and that the receiving positions (8 to 8'"') are displaceable horizontally transversely to the rolling direction (2).
    5. Hot strip rolling train according to one of claims 1 to 3, characterised in that the receiving positions (8 to 8"") of the compensating oven (7) are arranged parallel to one another and that the receiving positions (8 to 8"") are displaceable vertically transversely to the rolling direction (2).
    6. Hot strip rolling train according to one of claims 1 to 3, characterised in that at least one ferry (11, 12) displaceable transversely to the rolling direction (2) and receiving at least one respective starting strip is associated with the compensating oven (7').
    7. Hot strip rolling train according to claim 6, characterised in that the receiving positions (13 to 13"') of the compensating oven (7') are arranged one behind the other and that ferries (11, 12) are provided at both ends of the compensating oven (7').
    8. Hot strip rolling train according to one of claims 1 to 7, characterised in that the compensating oven (7, 7') is a roller hearth oven.
    EP97120406A 1997-11-21 1997-11-21 Adaption of hot rolling lines for rolling thin strips Expired - Lifetime EP0919296B1 (en)

    Priority Applications (5)

    Application Number Priority Date Filing Date Title
    EP97120406A EP0919296B1 (en) 1997-11-21 1997-11-21 Adaption of hot rolling lines for rolling thin strips
    ES97120406T ES2196240T3 (en) 1997-11-21 1997-11-21 RE-EQUIPMENT OF HOT LAMINATING TRAINS TO LAMINATE SLIM BANDS.
    AT97120406T ATE235972T1 (en) 1997-11-21 1997-11-21 RETROFITTING HOT ROLLING TRAINS FOR ROLLING THIN STRIPS
    DE59709709T DE59709709D1 (en) 1997-11-21 1997-11-21 Retrofitting hot rolling mills for rolling thin strips
    US09/196,379 US6122950A (en) 1997-11-21 1998-11-19 Hot rolling train for rolling thin strips

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP97120406A EP0919296B1 (en) 1997-11-21 1997-11-21 Adaption of hot rolling lines for rolling thin strips

    Publications (2)

    Publication Number Publication Date
    EP0919296A1 EP0919296A1 (en) 1999-06-02
    EP0919296B1 true EP0919296B1 (en) 2003-04-02

    Family

    ID=8227654

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP97120406A Expired - Lifetime EP0919296B1 (en) 1997-11-21 1997-11-21 Adaption of hot rolling lines for rolling thin strips

    Country Status (5)

    Country Link
    US (1) US6122950A (en)
    EP (1) EP0919296B1 (en)
    AT (1) ATE235972T1 (en)
    DE (1) DE59709709D1 (en)
    ES (1) ES2196240T3 (en)

    Cited By (1)

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    Publication number Priority date Publication date Assignee Title
    DE102016105622B4 (en) 2016-03-24 2022-01-13 Ludwig Hettich Holding Gmbh & Co. Kg Process for the production of a screw anchor with a metric connection thread

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    AT407348B (en) * 1997-10-10 2001-02-26 Voest Alpine Ind Anlagen METHOD FOR PRODUCING A HOT ROLLED PRODUCT AND SYSTEM FOR IMPLEMENTING THE METHOD
    GB2340759B (en) * 1998-08-26 2003-05-07 Bespak Plc Improvements in drug delivery devices
    IT1400913B1 (en) 2010-06-24 2013-07-02 Danieli Off Mecc PROCEDURE AND PLANT FOR CASTING AND LAMINATION TO MAKE LONG METAL LAMINATE PRODUCTS
    EP3714999B1 (en) 2019-03-28 2022-09-28 Primetals Technologies Germany GmbH Determination of the adjustment of a roll stand
    CN118023287A (en) * 2022-11-11 2024-05-14 达涅利机械设备股份公司 Installation and method for producing flat rolled products
    CN118023294A (en) * 2022-11-11 2024-05-14 达涅利机械设备股份公司 Method for retrofitting a plant for producing flat rolled products

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    Also Published As

    Publication number Publication date
    EP0919296A1 (en) 1999-06-02
    DE59709709D1 (en) 2003-05-08
    US6122950A (en) 2000-09-26
    ATE235972T1 (en) 2003-04-15
    ES2196240T3 (en) 2003-12-16

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