EP0265757B1 - Method and arrangement for rolling continuously cast profiles - Google Patents

Method and arrangement for rolling continuously cast profiles Download PDF

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Publication number
EP0265757B1
EP0265757B1 EP87114862A EP87114862A EP0265757B1 EP 0265757 B1 EP0265757 B1 EP 0265757B1 EP 87114862 A EP87114862 A EP 87114862A EP 87114862 A EP87114862 A EP 87114862A EP 0265757 B1 EP0265757 B1 EP 0265757B1
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EP
European Patent Office
Prior art keywords
stand
profile
universal
web
flange
Prior art date
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Expired - Lifetime
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EP87114862A
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German (de)
French (fr)
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EP0265757A3 (en
EP0265757A2 (en
Inventor
Georg Engel
Dietmar Kosak
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SMS Siemag AG
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SMS Schloemann Siemag AG
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Application filed by SMS Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT87114862T priority Critical patent/ATE87514T1/en
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Publication of EP0265757A3 publication Critical patent/EP0265757A3/en
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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
    • 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
    • B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/14—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 structural sections, i.e. work of special cross-section, e.g. angle steel in a non-continuous process, i.e. at least one reversing stand
    • 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
    • B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/088—H- or I-sections
    • 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
    • B21B13/001—Convertible or tiltable stands, e.g. from duo to universal stands, from horizontal to vertical stands
    • 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
    • B21B2013/003—Inactive rolling stands
    • 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, as known from DE-A-2844433, for rolling finished profiles from a preliminary profile by means of a roll stand arrangement working in the reversing mode, which forms a compact rolling group, consisting of a first one provided on the input side and working in the reversing mode Universal scaffold, a second universal scaffold provided on the output side and a compression frame arranged between these universal scaffolds, which is preceded by a compression scaffold arranged directly in front of the first universal scaffold, in which the preliminary profile is a profile coming from a continuous casting device, which at both ends of a web, the later finished profile has reinforcements accordingly, and the dimensions of the preliminary profile are matched to predetermined dimensions, such as web height, web thickness and / or flange width of the finished profile to be rolled, in such a way that this preliminary profile directly into the first universal framework without any further deformation Compact group is introduced and can then be finished rolled into the finished profile with the specified dimensions.
  • a rolling mill for the rolling of shaped steel, which has a heavy roughing stand that is operated in the reversing mode on the input side and that also has a reversing mode that operates over a longer roller table
  • Reverse tandem scaffolding group connects, which, again via a correspondingly long roller table, is followed by a finishing group on the output side.
  • the task of eliminating these disadvantages, which result from the rolling of rolled sections with predetermined, different final dimensions in the compact rolling groups with universal stands, if a preliminary profile coming from a continuous casting device and thus fixed in its dimensions is to be fed to them. and thereby creating the possibility of rolling finished profiles with significantly larger final dimension differences from this single continuous casting profile in one and the same compact rolling mill than was previously possible when introducing a preliminary profile coming from a continuous casting device into compact rolling groups, is achieved according to the invention in that the second universal stand is designed as a finishing stand and works both continuously as a working stand, with a reduced reduction compared to the first universal stand, and also in the last pass as a finishing stand in reverse operation, and the web u nd / or the flanges of this preliminary profile to achieve other dimensions that deviate from the original specification of the web height, web thickness and / or flange width in the compact rolling group rolling finished profile before it is introduced into the first universal stand of the compact rolling group by which this upstream upset is reduced.
  • the web of a continuously extruded profile can either be additionally compressed and thus shortened as required, or it can be rolled out, if necessary with the addition of reinforcements of the web of the continuous casting profile which can be cast in a known manner, and if necessary the width of the flanges can be reduced and thus the width can be reduced Expand the range of finished profiles that can be produced from an initial continuous casting profile with little effort.
  • liquid steel is fed from a pan 1 into a distributor 2, which feeds the mold 3.
  • the strand is advanced along a support device 4 by cold strand drivers 5 and when passing directional drivers 6 directed.
  • scissors or flame cutting machines are provided for dividing the strand after solidification.
  • the continuously cast profiles can be used hot or cold. When hot, they are, as indicated in the drawing, fed directly to a continuous furnace 8, which ensures the optimum rolling temperature.
  • the profiles separated from the strand are pushed onto a storage rack, not shown, from which they can be temporarily stored in a cold store, for example by means of a crane.
  • the continuous furnace 8 which can be equipped with a walking beam bed and / or an oven roller table, and after reaching the optimum temperature for rolling, are pushed out onto the roller table 7 in the direction of the following compact rolling mill.
  • the compact rolling mill consists of an edging stand, in the drawing a vertical edging stand 9, a subordinate universal stand 10 used as a work stand, then a (horizontal) flanged edging stand 11, which is followed by another universal stand 12, which is expediently designed and operated as a finishing stand becomes.
  • the continuously cast profiles which are divided by a pair of scissors, a flame cutting machine or the like, are fed to the stands either in direct use or from the cold store, advantageously via a furnace which sets and secures the rolling temperature, in the exemplary embodiment the continuous furnace 8.
  • the stitches of the stands are like normally set in reverse operation.
  • the universal stands 10 and 12 can also be equipped and operated as universal stands or can be operated with duo roller sets as duo stands.
  • the stand 10 has proven useful here to use the stand 10 as a working stand with full normal reduction, while the universal stand 12 is operated as a finishing stand, that is to say with a reduced reduction compared to the universal stand 10, so that the same roll service lives are achieved with a corresponding choice of reductions and rolling qualities .
  • Reversing is customary here, so that, for example, three passes, there are six universal stitches with the universal stands 10 and 12 and three upsetting stitches with the flanges-upsetting stand 11.
  • the upstream compression frame 9 remains open during the rolling of conventional profiles and is therefore ineffective.
  • the vertical rolls of the universal stand 10 can have a bale in the form of two opposing truncated cones which taper towards the roll neck, so that when rolling in the universal roll stand 10, the flanges of I-beams are slightly angled in a V-shape and one speaks of an X-calibration, while the vertical rollers of the universal stand 12 are essentially cylindrical, so that flanges which are perpendicular to the web height result in accordance with an H-calibration.
  • the upsetting frame 9 is additionally used with vertically standing rollers and is set against the flanges of the initial profile. By compressing the flanges of the input profile, the web is compressed and thus shortened.
  • the use of this upsetting frame 9, especially if it is a one-time upsetting stitch, can be carried out in parallel with a reshaping in the following stands, so that a continuous casting profile to be rolled is inserted into the upsetting frame 9 and after upsetting the web or reducing the The web height continues to run into the following universal stand 10, the flange compression stand 11 and the universal stand 12. After passing through and reversing, the upsetting frame 9 is opened so far that only the universal frame 12, the flanges upsetting frame 11 and the universal frame 10 are involved in the following stitches.
  • the rollers of the universal stands 10 and 12 and, if appropriate, of the flange upsetting frame 11 are moved so far apart that the first two stitches of the compression frame 9 are not hindered, and only during the third pass of the continuous casting profile become the roller sets of the universal stands 10 and 12 as well as the flange compression frame 10.
  • areas of roll bales of a further upstream, upright, upset frame or else of the flange upset 11 can be placed against the web of the profile in order to prevent the same from buckling during upsetting or to straighten it again.
  • the upsetting stand 9 can also be designed as a so-called tilting stand, which can be pivoted through 90 ° about the rolling stock axis, so that it can be used either as a horizontal stand or as a vertical stand.
  • the flange compression frame as a corresponding horizontal frame.
  • a horizontal compression frame can be provided. In each of these cases, caliber parts that can be adjusted against the flanks of the flanges are used here, but rather parts of the caliber of the rollers that are effective in the area of the web of the profile to be rolled.
  • Such horizontal frameworks can be used particularly effectively if a continuously cast "dog-bone" profile is used, the web of which is reinforced at least in some areas.
  • Such reinforcements can generally be obtained without replacing the continuous casting mold 3, for example by moving parts of the mold against each other or by removing parts used from the mold. Especially with such at least in their central region reinforced webs can be achieved by rolling them out a considerable extension and thus increase the lancing height.
  • the usual heavy roughing stand which is loaded with up to 15 preforming stitches, for example, is saved as well as the roller tables assigned to it, and it is worked with an already shaped and adapted to the product, continuously cast profile in the entrance of a reversing tandem stand group, without that the advantageous use of essentially a continuously cast profile would disadvantageously limit the range of finished profiles to be created from it.
  • an upstream compression stand 9 designed as a vertical stand web heights can be reduced without problems, whereby, if appropriate in accordance with the shape of the vertical rolls of the first universal stand, conical frustum in the form of conical trunks which taper towards the roll neck can be used, but also cylindrical ones Rollers are usable.
  • a further saving can be achieved by dispensing with a downstream finishing stand or a downstream finishing group and by executing and using the last stand of the reversing tandem stand group as a finishing stand. It has proven useful to set smaller stitch reductions than the universal scaffold 10 used as a work scaffold.
  • the possibilities of influencing can be increased if either a horizontal compression scaffold 9 is provided in addition to the vertical compression scaffold 9 or a tilting scaffold is provided which is provided by a 90 ° swivel movement either as a vertical or as a horizontal frame is usable.
  • a horizontal compression scaffold 9 is provided in addition to the vertical compression scaffold 9
  • a tilting scaffold is provided which is provided by a 90 ° swivel movement either as a vertical or as a horizontal frame is usable.

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

Abstract

A hot profile-steel workpiece having a flange width dimension, a web height dimension, and a web thickness dimension is rolled in a roll train including a reversible univerial rolling stand and a flange-compacting roll stand unstream therefrom. According to the invention one of the height, width, or thickness dimensions of the incoming workpiece is reduced upstream of the flange-engaging compacting roll stand. Normally the web height dimension is reduced in a roll stand immediately upstream of the universal and flange-compacting stands. Furthermore the workpiece has a web with extra-thick parts and these extra-thick parts are rolled out by horizontal rolls of a roll stand that engage this web. The flange-compacting roll stand engages the faces of the flanges. With this system it is possible to make the web of the incoming workpiece either shorter or taller, that is it can either be compacted or rolled out.

Description

Die Erfindung bezieht sich auf ein Verfahren, wie aus der DE-A-2844433 bekannt, zum Walzen von Fertigprofilen aus einem Vorprofil mittels einer, im Reversierbetrieb arbeitenden Walzgerüst-Anordnung, die eine Kompaktwalzgruppe bildet, bestehend aus einem eingangsseitig vorgesehenen, im Reversierbetrieb arbeitenden ersten Universalgerüst, einem ausgangsseitig vorgesehenen, zweiten Universalgerüst und einem, zwischen diesen Universalgerüsten angeordneten Stauchgerüst, denen ein unmittelbar vor dem ersten Universalgerüst angeordnetes Stauchgerüst vorgeordnet ist, bei dem das Vorprofil ein, aus einer Stranggußeinrichtung kommendes Profil ist, das beidendig eines Steges, dem späteren Fertigprofil entsprechend Verstärkungen aufweist, und die Abmessungen des Vorprofils auf vorgegebene Abmaße, wie Steghöhe, Stegdicke und/oder Flanschenbreite des zu walzenden Fertigprofils so abgestimmt sind, daß dieses Vorprofil ohne jede weitere Verformung direkt in das erste Universalgerüst der Kompaktgruppe eingeführt und dann in dieser zu dem Fertigprofil mit den vorgegebenen Abmaßen fertig walzbar ist.The invention relates to a method, as known from DE-A-2844433, for rolling finished profiles from a preliminary profile by means of a roll stand arrangement working in the reversing mode, which forms a compact rolling group, consisting of a first one provided on the input side and working in the reversing mode Universal scaffold, a second universal scaffold provided on the output side and a compression frame arranged between these universal scaffolds, which is preceded by a compression scaffold arranged directly in front of the first universal scaffold, in which the preliminary profile is a profile coming from a continuous casting device, which at both ends of a web, the later finished profile has reinforcements accordingly, and the dimensions of the preliminary profile are matched to predetermined dimensions, such as web height, web thickness and / or flange width of the finished profile to be rolled, in such a way that this preliminary profile directly into the first universal framework without any further deformation Compact group is introduced and can then be finished rolled into the finished profile with the specified dimensions.

Üblicherweise wird, bspw. entsprechend der Firmendruckschrift W 2/3115 der SMS Schloemann-Siemag AG, Düsseldorf, zum Walzen von Formstahl eine Walzstraße vorgesehen, die eingangsseitig ein im Reversierbetrieb betriebenes schweres Vorgerüst aufweist, dem sich über einen längeren Rollgang eine ebenfalls im Reversierbetrieb arbeitende Umkehr-Tandem-Gerüstgruppe anschließt, der, wiederum über einen entsprechend langen Rollgang, ausgangsseitig eine Fertiggruppe folgt. Nach der EP-A- 0256409 (& DE-A- 36 27 729) (dokument gemäß artikel 54(3) EPÜ) kann auf eine gesonderte Fertiggruppe sowie den dieser vorgeordneten Rollgang verzichtet werden, wenn das zweite bzw. letzte der Universalgerüste der Umkehr-Tandem-Gerüstgruppe als Fertiggerüst ausgebildet ist und betrieben wird. Auch auf das schwere Vorgerüst mit einer gegebenenfalls hohen Anzahl von Vorstichen kann verzichtet werden, wenn nicht Blöcke zum Formstahl herabgewalzt werden, sondern stranggegossene Profile zur Verfügung stehen. Bei der Wahl der Stranggußkokille versucht man hierbei, den Querschnitt des Stranggußprofiles derart zu beeinflussen, daß zum Walzen üblicher Endprofile bereits erste Vorkehrungen getroffen sind und diese ohne weitere Maßnahmen in das erste der Universalgerüste einzutreten vermögen. Bewährt hat es sich hierbei, ein Vorprofil zu erstellen, das beidendig eines Steges bereits Verstärkungen aufweist, und das als "Hundeknochen"- bzw. "dog-bone"-Profil bezeichnet wird.Usually, for example in accordance with company publication W 2/3115 of SMS Schloemann-Siemag AG, Düsseldorf, a rolling mill is provided for the rolling of shaped steel, which has a heavy roughing stand that is operated in the reversing mode on the input side and that also has a reversing mode that operates over a longer roller table Reverse tandem scaffolding group connects, which, again via a correspondingly long roller table, is followed by a finishing group on the output side. According to EP-A-0256409 (& DE-A-36 27 729) (document according to article 54 (3) EPC), a separate finishing group and the roller table upstream of it can be dispensed with if the second or last one of the universal stands reverses -Tandem scaffolding group is designed and operated as a finishing scaffold. Even on the heavy Roughing stands with a possibly high number of pre-passes can be omitted if blocks are not rolled down to form steel, but continuously cast profiles are available. When selecting the continuous casting mold, an attempt is made to influence the cross section of the continuous casting profile in such a way that first precautions have already been taken for rolling conventional end profiles and these can enter the first of the universal stands without further measures. It has proven useful here to create a preliminary profile which already has reinforcements at both ends of a web and which is referred to as a "dog bone" or "dog bone" profile.

Es hat sich hierbei allerdings herausgestellt, daß die Abmessungen eines solchen Vorprofiles bereits weitgehend die mittels der Umkehr-Tandem-Gerüstgruppe leicht erzielbaren Endprofile bestimmen, die, bspw. im Falle von I-Träger-Profilen, vermittels von Universalgerüsten erstellt werden, während im Falle bspw. von U-Profilen bereits eine Duo-Walzung zum Erfolg führen kann. Da jedoch ein Wechsel des Strangguß-Profiles neue Kokillen und damit Umrüstarbeiten und die mit diesen verbundenen unvorteilhaften Stillstandszeiten bedingt, ist man bestrebt, nach Möglichkeit mit einem vorgegebenen Eingangsprofil auszukommen, wobei zwar ein mittlerer Querschnittsbereich der Ausgangsprofile sich problemlos erreichen läßt, von diesen abweichende stärkere oder schwächere Profile jedoch einen hohen zusätzlich Aufwand bedingen.It has been found here, however, that the dimensions of such a preliminary profile largely determine the end profiles that can easily be achieved by means of the reversing tandem scaffolding group, which, for example in the case of I-beam profiles, are created by means of universal scaffolds, while in the case For example, a duo-roll of U-profiles can already lead to success. However, since a change in the continuous casting profile necessitates new molds and thus retooling work and the associated disadvantageous downtimes, efforts are made to make do with a given input profile where possible, although a medium cross-sectional area of the output profiles can be achieved without problems, stronger ones deviating from them or weaker profiles, however, require a lot of additional effort.

Die Aufgabe, diese geschilderten Nachteile, die sich beim Walzen von Walzprofilen mit vorgegebenen, unterschiedlichen Endabmaßen in den Kompaktwalzgruppen mit Universalgerüsten ergeben, wenn diesen ein, aus einer Stranggußeinrichtung kommendes und dadurch in seinen Abmaßen festgelegtes und nicht variables Vorprofil zugeführt werden soll, zu beseitigen, und dabei die Möglichkeit zu schaffen, aus diesem einzigen Stranggußprofil in ein und derselben Kompaktwalzstraße Fertigprofile mit bedeutend größeren Endabmessungsunterschieden zu walzen als dies bisher, bei Einführung eines, aus einer Stranggußeinrichtung kommenden Vorprofils in Kompaktwalzgruppen möglich war, wird erfindungsgemäß dadurch gelöst, daß das zweite Universalgerüst als Fertiggerüst ausgebildet ist und sowohl als Arbeitsgerüst, mit gegenüber dem ersten Universalgerüst verringerter Reduktion, wie auch im letzten Durchgang als Fertiggerüst kontinuierlich im Reversierbetrieb arbeitet, und wobei der Steg und/oder die Flanschen dieses Vorprofils zur Erzielung von anderen, von der ursprünglichen Vorgabe der Steghöhe, Stegdicke und/oder Flanschenbreite abweichenden Abmaßen des in der Kompaktwalzgruppe fertig zu walzenden Fertigprofils vor dessen Einführung in das erste Universalgerüst der Kompaktwalzgruppe durch das dieser vorgeordnete Stauchgerüst reduzierend walzverformt werden.The task of eliminating these disadvantages, which result from the rolling of rolled sections with predetermined, different final dimensions in the compact rolling groups with universal stands, if a preliminary profile coming from a continuous casting device and thus fixed in its dimensions is to be fed to them. and thereby creating the possibility of rolling finished profiles with significantly larger final dimension differences from this single continuous casting profile in one and the same compact rolling mill than was previously possible when introducing a preliminary profile coming from a continuous casting device into compact rolling groups, is achieved according to the invention in that the second universal stand is designed as a finishing stand and works both continuously as a working stand, with a reduced reduction compared to the first universal stand, and also in the last pass as a finishing stand in reverse operation, and the web u nd / or the flanges of this preliminary profile to achieve other dimensions that deviate from the original specification of the web height, web thickness and / or flange width in the compact rolling group rolling finished profile before it is introduced into the first universal stand of the compact rolling group by which this upstream upset is reduced.

Hierdurch läßt sich der Steg eines zugeführten stranggegossenen Profils jeweils nach Bedarf entweder zusätzlich Stauchen und damit verkürzen oder er läßt sich, gegegebenenfalls unter Einbeziehung von in bekannter Weise gießbarer Verstärkungen des Steges des Stranggußprofiles stärker Auswalzen und gegebenenfalls läßt sich die Breite der Flansche reduzieren und damit die Palette von aus einem Ausgangs-Stranggußprofil herstellbaren Fertigprofile mit geringem Aufwand wesentlich erweitern.As a result, the web of a continuously extruded profile can either be additionally compressed and thus shortened as required, or it can be rolled out, if necessary with the addition of reinforcements of the web of the continuous casting profile which can be cast in a known manner, and if necessary the width of the flanges can be reduced and thus the width can be reduced Expand the range of finished profiles that can be produced from an initial continuous casting profile with little effort.

Im einzelnen ist die Erfindung anhand der folgenden Beschreibung von Ausführungsbeispielen in Verbindung mit einer diese darstellenden Zeichnung erläutert. In dieser Zeichnung sind schematisch die Herstellung eines Stranggußprofiles, dessen Temperierung in einem Durchlaufofen sowie eine zum Walzen benutzte Kompakt-Gerüstgruppe dargestellt.The invention is explained in more detail on the basis of the following description of exemplary embodiments in conjunction with a drawing representing them. This drawing shows schematically the production of a continuous casting profile, its temperature control in a continuous furnace and a compact stand group used for rolling.

Im einzelnen wird aus einer Pfanne 1 flüssiger Stahl in einen Verteiler 2 gegeben, welcher die Kokille 3 speist. Der Strang wird entlang einer Stützvvorrichtung 4 durch Kaltstrangtreiber 5 vorgeschoben und beim Passieren von Richttreibern 6 gerichtet. Zum Aufteilen des Stranges nach der Erstarrung sind zur Vereinfachung der Zeichnung in dieser nicht dargestellte Scheren oder Brennschneidmaschinen vorgesehen. Entsprechend dem jeweiligen Produktionsprogramm des Walzwerkes können die stranggegossenen Profile heiß oder kalt eingesetzt werden. Beim Heißeinsatz werden sie, wie in der Zeichnung angedeutet, direkt einem Durchlaufofen 8 zugeführt, welcher die optimale Walztemperatur sichert. Im Falle des Kalteinsatzes werden die vom Strang abgetrennten Profile auf einen nicht dargestellten Lagerrost abgeschoben, von dem aus sie, bspw. vermittels eines Kranes, in einem Kaltlager zwischengelagert werden können. Zum Zwecke des Walzens werden auch sie dem Durchlaufofen 8 zugeführt, der mit einem Hubbalkenbett und/oder einem Ofenrollgang ausgestattet sein kann, und werden nach Erreichen der zum Walzen optimalen Temperatur auf den Rollgang 7 in Richtung auf das folgende Kompaktwalzwerk ausgeschoben.In particular, liquid steel is fed from a pan 1 into a distributor 2, which feeds the mold 3. The strand is advanced along a support device 4 by cold strand drivers 5 and when passing directional drivers 6 directed. To simplify the drawing, scissors or flame cutting machines (not shown) are provided for dividing the strand after solidification. Depending on the respective production program of the rolling mill, the continuously cast profiles can be used hot or cold. When hot, they are, as indicated in the drawing, fed directly to a continuous furnace 8, which ensures the optimum rolling temperature. In the case of cold use, the profiles separated from the strand are pushed onto a storage rack, not shown, from which they can be temporarily stored in a cold store, for example by means of a crane. For the purpose of rolling, they are also fed to the continuous furnace 8, which can be equipped with a walking beam bed and / or an oven roller table, and after reaching the optimum temperature for rolling, are pushed out onto the roller table 7 in the direction of the following compact rolling mill.

Das Kompaktwalzwerk besteht aus einem Stauchgerüst, in der Zeichnung einem Vertikal-Stauchgerüst 9, einem nachgeordneten, als Arbeitsgerüst verwendeten Universalgerüst 10, einem dann folgenden (horizontalen) Flanschen-Stauchgerüst 11, dem ein weiteres Universalgerüst 12 folgt, das zweckmäßig als Fertiggerüst ausgebildet und betrieben wird.The compact rolling mill consists of an edging stand, in the drawing a vertical edging stand 9, a subordinate universal stand 10 used as a work stand, then a (horizontal) flanged edging stand 11, which is followed by another universal stand 12, which is expediently designed and operated as a finishing stand becomes.

Im Betriebe werden die stranggegossenen, durch eine Schere, eine Brennschneidmaschine oder dergleichen aufgeteilten Profile entweder im direkten Einsatz oder vom Kaltlager her zweckmäßig über einen die Walztemperatur einstellenden und sichernden Ofen, im Ausführungsbeispiel dem Durchlaufofen 8, den Gerüsten zugeführt. Beim Walzen üblicher, dem Stranggußprofil angepaßter Profile werden die Stiche der Gerüste wie im Reversierbetrieb üblich eingestellt. Hierbei können entsprechend den zu walzenden Profilen die Universalgerüste 10 und 12 auch als Universalgerüste bestückt und betrieben oder aber mit Duo-Walzensätzen bestückt als Duo-Gerüste betrieben werden. Bewährt hat es sich hierbei, das Gerüst 10 als Arbeitsgerüst mit voller üblicher Reduktion einzusetzen, während das Universalgerüst 12 als Fertiggerüst betrieben wird, das heißt, mit gegenüber dem Universalgerüst 10 verringerter Reduktion, so daß bei entsprechender Wahl der Reduktionen und Walzqualitäten gleiche Walzenstandzeiten erzielt werden. Üblich ist hierbei ein Reversieren, so daß bei bspw. drei Durchläufen sich sechs Universalstiche mit den Universalgerüsten 10 und 12 und drei Stauchstiche mit dem Flanschen-Stauchgerüst 11 ergeben. Das vorgeordnete Stauchgerüst 9 bleibt beim Walzen üblicher Profile geöffnet und damit unwirksam. In an sich bekannter Weise können hierbei die Vertikalwalzen des Universalgerüstes 10 einen Ballen in Form zweier gegeneinandergesetzter Kegelstümpfe aufweisen, die sich zu den Walzenzapfen hin verjüngen, so daß beim Walzen im Universalwalzgerüst 10 die Flanschen von I-Trägern leicht V-förmig angewinkelt werden und man von einer X-Kalibrierung spricht, während die Vertikalwalzen des Universalgerüstes 12 im wesentlichen zylindrisch ausgebildet sind, so daß sich innerhalb einer rechtwinklig zur Steghöhe stehende Flanschen entsprechend einer H-Kalibrierung ergeben. Es ist aber auch möglich, auch das vorgelagerte Universalgerüst 10 mit zylindrischen Walzen auszustatten, so daß in jedem Falle mit einer H-Kalibrierung gearbeitet wird und die Flansche in einer rechtwinklig zum Steg stehenden Ebene liegen. Hierbei wird davon ausgegangen, daß in üblicher Weise I-Profile gewalzt werden, indem die einseitig des Profils angeordneten Flanken der Flansche nach unten weisen bzw. auf den Rollgängen aufliegen und deren Stege horizontal in halber Höhe der Flanschen stehen.In operation, the continuously cast profiles, which are divided by a pair of scissors, a flame cutting machine or the like, are fed to the stands either in direct use or from the cold store, advantageously via a furnace which sets and secures the rolling temperature, in the exemplary embodiment the continuous furnace 8. When rolling conventional profiles that are adapted to the continuous casting profile, the stitches of the stands are like normally set in reverse operation. According to the profiles to be rolled, the universal stands 10 and 12 can also be equipped and operated as universal stands or can be operated with duo roller sets as duo stands. It has proven useful here to use the stand 10 as a working stand with full normal reduction, while the universal stand 12 is operated as a finishing stand, that is to say with a reduced reduction compared to the universal stand 10, so that the same roll service lives are achieved with a corresponding choice of reductions and rolling qualities . Reversing is customary here, so that, for example, three passes, there are six universal stitches with the universal stands 10 and 12 and three upsetting stitches with the flanges-upsetting stand 11. The upstream compression frame 9 remains open during the rolling of conventional profiles and is therefore ineffective. In a manner known per se, the vertical rolls of the universal stand 10 can have a bale in the form of two opposing truncated cones which taper towards the roll neck, so that when rolling in the universal roll stand 10, the flanges of I-beams are slightly angled in a V-shape and one speaks of an X-calibration, while the vertical rollers of the universal stand 12 are essentially cylindrical, so that flanges which are perpendicular to the web height result in accordance with an H-calibration. However, it is also possible to equip the upstream universal stand 10 with cylindrical rollers, so that in any case an H calibration is used and the flanges lie in a plane perpendicular to the web. It is assumed that I-profiles are rolled in the usual way by arranging them on one side of the profile Point the flanks of the flanges downwards or rest on the roller tables with their webs standing horizontally halfway up the flanges.

Gilt es, gegenüber dem Ausgangsprofil verringerte Steghöhen zu erreichen, so wird zusätzlich das Stauchgerüst 9 mit vertikal stehenden Walzen eingesetzt und gegen die Flansche des Eingangsprofiles angestellt. Durch das Zusammenpressen der Flansche des Eingangsprofiles wird eine Stauchung und damit Verkürzung von dessen Steg bewirkt. Die Benutzung dieses Stauchgerüstes 9 kann, insbesondere wenn es sich um einen einmaligen Stauchstich handelt, parallel mit einer Umformung in den folgenden Gerüsten vorgenommen werden, so daß ein zu walzendes Stranggußprofil in das Stauchgerüst 9 eingeführt wird und nach Stauchen des Steges bzw. der Reduzierung der Steghöhe kontinuierlich weiter in das folgende Universalgerüst 10, das Flanschen-Stauchgerüst 11 und das Universalgerüst 12 einläuft. Nach Durchlaufen und dem Reversieren wird das Stauchgerüst 9 so weit geöffnet, daß an den folgenden Stichen nur das Universalgerüst 12, das Flanschen-Stauchgerüst 11 und das Universalgerüst 10 beteiligt sind.If it is necessary to achieve reduced web heights compared to the initial profile, the upsetting frame 9 is additionally used with vertically standing rollers and is set against the flanges of the initial profile. By compressing the flanges of the input profile, the web is compressed and thus shortened. The use of this upsetting frame 9, especially if it is a one-time upsetting stitch, can be carried out in parallel with a reshaping in the following stands, so that a continuous casting profile to be rolled is inserted into the upsetting frame 9 and after upsetting the web or reducing the The web height continues to run into the following universal stand 10, the flange compression stand 11 and the universal stand 12. After passing through and reversing, the upsetting frame 9 is opened so far that only the universal frame 12, the flanges upsetting frame 11 and the universal frame 10 are involved in the following stitches.

Zum stärkeren Stauchen der Steghöhe kann es erforderlich werden, auch das Stauchgerüst 9 mehrfach, d.h. im Reversierbetrieb, zu benutzen. Hierbei werden für den ersten Stich und das erste Zurückführen des Stranggußprofiles die Walzen der Universalgerüste 10 und 12 sowie gegebenenfalls des Flanschen-Stauchgerüstes 11 so weit auseinandergefahren, daß die beiden ersten Stiche des Stauchgerüstes 9 nicht behindert werden, und erst während des dritten Durchlaufes des Stranggußprofiles werden die Walzensätze der Universalgerüste 10 und 12 sowie des Flanschen-Stauchgerüstes 10 angestellt. Hierbei können Bereiche von Walzenballen eines weiteren vorgeordneten, Horizontalwalzen aufweisenden Stauchgerüstes oder aber des Flanschen-Stauchgerüstes 11 gegen den Steg des Profiles angestellt werden, um ein Ausknicken desselben beim Stauchen zu unterbinden, oder ihn erneut zu richten.For more upsetting the web height, it may be necessary to also use the upsetting frame 9 several times, ie in reversing operation. Here, for the first stitch and the first return of the continuous casting profile, the rollers of the universal stands 10 and 12 and, if appropriate, of the flange upsetting frame 11 are moved so far apart that the first two stitches of the compression frame 9 are not hindered, and only during the third pass of the continuous casting profile become the roller sets of the universal stands 10 and 12 as well as the flange compression frame 10. Here, areas of roll bales of a further upstream, upright, upset frame or else of the flange upset 11 can be placed against the web of the profile in order to prevent the same from buckling during upsetting or to straighten it again.

Umgekehrt ist es möglich, um größere Steghöhen zu erzielen, das Vertikalwalzen aufweisende Stauchgerüst 9 gegen ein Horizontalwalzen aufweisendes Stauchgerüst auszutauschen. Andererseits kann auch das Stauchgerüst 9 als sogenanntes Kippgerüst ausgeführt sein, das sich um 90° um die Walzgutachse schwenken läßt, so daß es wahlweise als Horizontal- oder als Vertikalgerüst einsetzbar ist. Des weiteren ist es noch möglich, das Flanschen-Stauchgerüst als entsprechendes Horizontalgerüst einzusetzen. Ferner kann zusätzlich zum vertikalen Stacuhgerüst 9 ein horizontales Stauchgerüst vorgesehen sein. In jeden dieser Fälle werden hierbei nicht gegen die Flanken der Flansche anstellbare Kaliberteile benutzt, sondern vielmehr im Bereiche des Steges des zu walzenden Profiles wirksame Teile der Kaliber der Walzen. Durch das stärkere Auswalzen der Stegbereiche des Stranggußprofiles wird eine Verbreiterung der Profilkammer bzw. eine Vergrößerung der Steghöhe erzielt. Besonders wirkungsvoll lassen sich solche Horizontalgerüste anwenden, wenn ein Stranggegossenes "dog-bone"-Profil benutzt wird, dessen Steg mindestens bereichsweise verstärkt ist. Solche Verstärkungen lassen sich im allgemeinen ohne Austausch der Strangguß-Kokille 3 erhalten, bspw. indem Teile der Kokille gegeneinander verschoben werden oder aber der Kokille eingesetzte Teile entnommen werden. Insbesondere bei solch mindestens in ihrem mittleren Bereich verstärkten Stegen läßt sich durch Auswalzen desselben eine erhebliche Streckung und damit Vergrößerung der Stechhöhe erreichen.Conversely, in order to achieve greater web heights, it is possible to replace the compression stand 9 having vertical rolling with a compression stand having horizontal rolling. On the other hand, the upsetting stand 9 can also be designed as a so-called tilting stand, which can be pivoted through 90 ° about the rolling stock axis, so that it can be used either as a horizontal stand or as a vertical stand. Furthermore, it is also possible to use the flange compression frame as a corresponding horizontal frame. In addition to the vertical stacking frame 9, a horizontal compression frame can be provided. In each of these cases, caliber parts that can be adjusted against the flanks of the flanges are used here, but rather parts of the caliber of the rollers that are effective in the area of the web of the profile to be rolled. Due to the stronger rolling out of the web areas of the continuous cast profile, the profile chamber is widened or the web height is increased. Such horizontal frameworks can be used particularly effectively if a continuously cast "dog-bone" profile is used, the web of which is reinforced at least in some areas. Such reinforcements can generally be obtained without replacing the continuous casting mold 3, for example by moving parts of the mold against each other or by removing parts used from the mold. Especially with such at least in their central region reinforced webs can be achieved by rolling them out a considerable extension and thus increase the lancing height.

In allen diesen Fällen wird das mit bspw. bis zu 15 Vorformstichen belastete übliche schwere Vorgerüst ebenso eingespart wie die diesem zugeordneten Rollgänge, und es wird mit einem bereits vorgeformten und dem Erzeugnis angepaßten, stranggegossenem Profil im Eingang einer Umkehr-Tandem-Gerüstgruppe gearbeitet, ohne daß bei der vorteilhaften Verwendung im wesentlichen eines stranggegossenen Profiles die Palette der aus diesem zu erstellenden Fertigprofile unvorteilhaft eingeschränkt wäre. Im Falle eines vorgeordneten, als Vertikalgerüst ausgebildeten Stauchgerüstes 9 lassen sich Steghöhen problemlos reduzieren, wobei, gegebenenfalls in Übereinstimmung mit der Form der Vertikalwalzen des ersten Universalgerüstes, in Form aneinandergesetzter Kegelstümpfe ausgeführte, sich jeweils zu den Walzenzapfen hin verjüngende Walzen einsetzbar sind, jedoch auch zylinderförmige Walzen benutzbar sind. Eine weitere Einsparung läßt sich gemäß der Figur erreichen, indem auf ein nachgeordnetes Fertiggerüst oder eine nachgeordnete Fertiggruppe verzichtet wird und das letzte Gerüst der Umkehr-Tandem-Gerüstgruppe als Fertiggerüst ausgeführt und verwendet wird. Hierbei hat es sich bewährt, jeweils geringere Stichabnahmen einzustellen als bei dem als Arbeitsgerüst verwendeten Universalgerüst 10. Die Möglichkeiten der Beeinflussung lassen sich steigern, wenn entweder zusätzlich zum Vertikal-Stauchgerüst 9 ein Horizontal-Stauchgerüst vorgesehen ist oder aber ein Kippgerüst vorgesehen ist, das durch eine 90° umfassenden Schwenkbewegung wahlweise als Vertikal- oder als Horizontalgerüst nutzbar ist. Schließlich besteht noch die Möglichkeit, das Vertikal-Stauchgerüst 9 durch ein entsprechendes Horizontal-Stauchgerüst zu ersetzen.In all these cases, the usual heavy roughing stand, which is loaded with up to 15 preforming stitches, for example, is saved as well as the roller tables assigned to it, and it is worked with an already shaped and adapted to the product, continuously cast profile in the entrance of a reversing tandem stand group, without that the advantageous use of essentially a continuously cast profile would disadvantageously limit the range of finished profiles to be created from it. In the case of an upstream compression stand 9 designed as a vertical stand, web heights can be reduced without problems, whereby, if appropriate in accordance with the shape of the vertical rolls of the first universal stand, conical frustum in the form of conical trunks which taper towards the roll neck can be used, but also cylindrical ones Rollers are usable. According to the figure, a further saving can be achieved by dispensing with a downstream finishing stand or a downstream finishing group and by executing and using the last stand of the reversing tandem stand group as a finishing stand. It has proven useful to set smaller stitch reductions than the universal scaffold 10 used as a work scaffold. The possibilities of influencing can be increased if either a horizontal compression scaffold 9 is provided in addition to the vertical compression scaffold 9 or a tilting scaffold is provided which is provided by a 90 ° swivel movement either as a vertical or as a horizontal frame is usable. Finally, there is also the possibility of replacing the vertical upsetting frame 9 with a corresponding horizontal upsetting frame.

Claims (1)

  1. Method for the rolling of finished profiles from a starting profile by means of a roll stand arrangement, which works in reversing operation and which forms a compact roll group, consisting of a first universal stand (10) provided at the inlet side and working in reversing operation, a second universal stand (12) provided at the outlet side, and an edging stand (11) arranged between these universal stands (10, 12), wherein the compact roll group is arranged ahead of an edging stand (9) arranged directly in front of the first universal stand (10) and wherein the starting profile is a profile which comes from a continuous casting plant and which at both ends of a web has the thicknesses corresponding to the later finished profile, and the measurements of the starting profile are so adjusted to the predetermined dimensions, such as web height, web thickness and/or flange width of the finished profile to be rolled that this starting profile is introduced directly into the first universal stand (10) of the compact roll group without any further deformation and is then able to be finish-rolled in this to the finished profile with the predetermined dimensions, characterised thereby that the second universal stand (12) is constructed as a finishing stand and works continuously in reversing operation not only as a working stand with reduced reduction compared to the first universal stand (10) but also in the last pass as a finishing stand, and wherein the web and/or the flanges of this starting profile are, for the achieving of other dimensions, which depart from the original predetermination of the web height, web thickness and/or flange width, of the finished profile to be finish-rolled in the compact roll group, reducingly roll-deformed by the edging stand (9) arranged ahead of the first universal roll stand (10) of the compact roll group before introduction of the finished profile into this first universal roll stand.
EP87114862A 1986-10-27 1987-10-12 Method and arrangement for rolling continuously cast profiles Expired - Lifetime EP0265757B1 (en)

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AT87114862T ATE87514T1 (en) 1986-10-27 1987-10-12 METHOD AND ARRANGEMENT FOR ROLLING CONTINUOUSLY CAST PROFILES.

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DE3636478 1986-10-27
DE3636478A DE3636478C2 (en) 1986-10-27 1986-10-27 Process for rolling finished profiles from a preliminary profile

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EP0265757A3 EP0265757A3 (en) 1988-08-10
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EP (1) EP0265757B1 (en)
JP (1) JP2529704B2 (en)
KR (1) KR960012860B1 (en)
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AT (1) ATE87514T1 (en)
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ES (1) ES2039393T3 (en)

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KR960012860B1 (en) 1996-09-25
JPS63115601A (en) 1988-05-20
US4860426A (en) 1989-08-29
DE3785138D1 (en) 1993-05-06
ES2039393T3 (en) 1993-10-01
ATE87514T1 (en) 1993-04-15
DE3636478A1 (en) 1988-04-28
DE3636478C2 (en) 1996-10-31
JP2529704B2 (en) 1996-09-04
EP0265757A3 (en) 1988-08-10
EP0265757A2 (en) 1988-05-04
CN1016762B (en) 1992-05-27
CN87107839A (en) 1988-06-22
KR880004875A (en) 1988-06-27

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