EP0256409B2 - Method of producing sections - Google Patents

Method of producing sections Download PDF

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Publication number
EP0256409B2
EP0256409B2 EP87111183A EP87111183A EP0256409B2 EP 0256409 B2 EP0256409 B2 EP 0256409B2 EP 87111183 A EP87111183 A EP 87111183A EP 87111183 A EP87111183 A EP 87111183A EP 0256409 B2 EP0256409 B2 EP 0256409B2
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EP
European Patent Office
Prior art keywords
rolling mill
stand
universal
reversing
group
Prior art date
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EP87111183A
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German (de)
French (fr)
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EP0256409A2 (en
EP0256409A3 (en
EP0256409B1 (en
Inventor
Georg Engel
Dietmar Kosak
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SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
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Application filed by SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT87111183T priority Critical patent/ATE56895T1/en
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Publication of EP0256409A3 publication Critical patent/EP0256409A3/en
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    • 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
    • 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
    • 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
    • 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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B21B37/52—Tension control; Compression control by drive motor control

Definitions

  • the invention relates to a method for producing shaped steel, in a shaped steel rolling mill with a double reversing roughing stand and in a tandem stand group, combined universal working stand, flanged edging stand and a universal finishing stand provided on the output side.
  • the invention also relates to a shaped steel rolling mill for carrying out the method.
  • Such a method, corresponding to the genus, for producing shaped steel is known from the prior publication JP-A 56 109101.
  • the aforementioned prior publication describes a girder mill consisting of a reversing roughing stand and an adjoining tandem stand group consisting of a universal reversing roughing stand and an associated flange-upsetting stand as well as a separate universal finishing stand.
  • the prefabricated stand which is separate from conventional girder mills, has been moved to the universal work scaffold group.
  • the universal finishing stand is open during the reversing roughing pass and is not in rolling contact with the form steel.
  • the universal finishing stand is set to the finished size only for the last pass of the section steel, so that - the finish stitch is rolled in the universal finishing stand.
  • the form steel is formed in a tandem stand group consisting of a universal work stand, a flange compression stand and a universal finishing stand. Only the universal working scaffold and the flanged compression stand are reversing working scaffolds.
  • the universal finishing stand is open during the forming process.
  • the form steel is passed through the opened roll gap of the finishing stand.
  • the roll gap of the universal finishing stand is not moved until the last stitch, the finish stitch, and the shaped steel is subjected to a single final stitch in the entrance.
  • the shaped steel is preformed with X-stitches in the universal working scaffold and in the flange compression scaffold; the flanges are only directed into the H-shape in the final stitch.
  • the pre-rolling of the shaped steel with X-stitches is disadvantageous for the microstructure formation in the transition from the web to the flange.
  • a triple tandem stand group which consists of two universal work stands and a flanged compression stand, the compression stand being arranged between the universal stands and this triple tandem group works in reverse operation.
  • the shaped steel is pre-rolled in this tandem stand group.
  • the shaped steel is then finish-rolled in a non-reversing universal finishing stand, which is at a greater distance from the roughing stand group mentioned.
  • the section steel is subjected to either only X-stitches or only H-stitches, which is disadvantageous for the structure formation in the transition from the web to the flange.
  • a disadvantage of this known rolling mill is the large length and the fact that the finishing stand is only used for a single pass, the finishing pass, while it is idle in the stand-by in the rolling line during reversing operation of the roughing stand group.
  • the invention is based on the object of providing a method for producing shaped steel of the type mentioned at the outset, by means of which both the space requirement and the required outlay are kept low and the forming capacity is nevertheless increased by better utilization of all the rolling stands arranged in the rolling mill.
  • the tandem scaffolding group works simultaneously as a reversing tandem scaffolding group in a reversing, reducing manner and the universal finishing stand is included in the production of the shaped steel in a reversing manner in all reduction stitches, and also the last finishing stitch in this Universal finishing stand is carried out and the universal finishing stand is set for a smaller reduction than the universal working stand during the reversing reduction of the shaped steel.
  • the universal finishing stand included in the reversing tandem stand group replaces the reversing working universal working stand, which is usually arranged in a three-way tandem group, and becomes a reversing working universal finishing stand .
  • a conventional steel mill is shown schematically.
  • blocks heated in a pusher furnace are pre-rolled in a reversing roughing stand 1, which is designed as a two-roll stand, in a number of passes, usually between seven and fifteen passes.
  • the preform is passed on to a reversing tandem scaffold group 2, which consists of a universal work scaffold 4, a flange compression scaffold 5 and a universal work scaffold 6.
  • the desired profile is largely approximated by repeated rolling in three or five passes.
  • the rolling stock enters a finished stand group 3, in which the support flanges are brought to the exact desired width again by means of a flange-upsetting stand 7, while the universal finishing stand 8, the final shape of the profile and determines the surface quality of the rolling stock.
  • An infeed roller table 9 leads to the reversing roughing stand 1, a feed roller table 10 is provided between it and the reversing tandem stand group 2, the reversing tandem stand group 2 is followed by a transfer roller table 11, and the finishing stand group 3 is an outfeed roller table 12 downstream, which leads, for example, to a cooling bed.
  • Both the reversing roughing stand 1 and the reversing tandem stand group 2 are heavily used for the forming by reversing and thus optimally used. Only the flanging mill 7 and the universal finishing stand 8 are used only for a very small reduction and are more used to secure the desired narrow tolerances of the profile obtained and the surface quality of the rolling stock.
  • the arrangement according to FIG. 2 is used for better utilization of all scaffolding.
  • the roughing from block to rough profile is effected by a reversing roughing stand 1, which allows a high forming capacity due to a large number of passes, for example five to thirteen passes.
  • the following reversing tandem scaffolding group has a universal working scaffold 4, a flange upsetting scaffold 5 and a universal finishing scaffold 8. These three scaffolds are also largely used by reversing at least twice, possibly more often, so that three upsetting stitches and six universal stitches can be achieved with just two reversals. However, the use of this reversing tandem scaffolding group 16 is not pushed up as much as that of the reversing tandem scaffolding group 2.
  • FIG. 3 A practical embodiment of the compact, high-performance shaped steel rolling mill is shown schematically in FIG. 3.
  • the block-heating pusher furnace 17 with its loading devices is shown as well as a descaler 18 after it.
  • the heated and descaled blocks are fed via an infeed roller table 9 to the reversing roughing stand 1, to which a roller quick-change device 19 is assigned and edging and shifting devices 20 in front and are subordinate.
  • the preliminary profiles are fed to the reversing tandem stand group 16 via a feed roller table 10 which is equipped with a cropping saw 21.
  • the scaffolding 4, 5 and 8 of this group is assigned a scaffolding changing device 22 which allows the scaffolding to be exchanged for refurbished scaffolding, it being possible to install scaffolding intended for duo or universal operation.
  • a downstream run-out roller table 12 leads to a cooling bed 24 via a tub shear 23, which can be used, for example, for dividing billets.
  • the vertical rolls of the universal work stands are slightly double-conical in such a way that their bales taper from their central planes to their roll neck.
  • the profiles rolled here have flange halves slightly bent outwards, so that one speaks of "X" pre-profiles, and only the universal finishing stand contains essentially cylindrical roller balls, so that the flange halves receive a common outer plane and the desired “H “Profile.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Steel (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Coating With Molten Metal (AREA)
  • Arc Welding In General (AREA)
  • Laminated Bodies (AREA)

Abstract

The structural steel rolling mill comprises a reversing two high rough rolling mill, at least one universal working rolling mill and at least one flanging edging rolling mill included in a reversing tandem rolling mill group, and a universal finishing rolling mill at the outlet end of the structural steel rolling mill. The reversing tandem group following the rough rolling mill has a universal working rolling mill, a flanging edging rolling mill and the universal finishing rolling mill. By including the universal finishing rolling mill in the reversing tandem rolling mill group the universal finishing rolling mill also participates in the reversing action and because of that is more effective in shaping than the standard finishing rolling mill so that in practice the special universal finishing rolling mill following the reversing tandem group is omitted as well as the edging rolling mill commonly provided with it and the roller bed located between them. The dimensional accuracy and the surface properties of the rolled product as well as the service life of the rolls of the universal finishing rolling mill are not impaired when the reduction of the universal finishing rolling mill is set smaller than that of the universal working rolling mill.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von Formstahl, in einem Formstahl-Walzwerk mit einem Duo-Umkehr-Vorgerüst und in einer Tandem-Gerüstgruppe zusammgenfaßtem Universal-Arbeitsgerüst, Flanschen-Stauchgerüst sowie einem ausgangsseitig vorgesehenen Universal-Fertiggerüst. Die Erfindung betrifft auch ein Formstahl-Walzwerk zur Durchführung des Verfahrens.The invention relates to a method for producing shaped steel, in a shaped steel rolling mill with a double reversing roughing stand and in a tandem stand group, combined universal working stand, flanged edging stand and a universal finishing stand provided on the output side. The invention also relates to a shaped steel rolling mill for carrying out the method.

Ein derartiges, der Gattung entsprechendes Verfahren zur Herstellung von Formstahl ist aus der Vorveröffentlichtung JP-A 56 109101 bekannt. Die genannte Vorveröffentlichung beschreibt eine Trägerstraße, bestehend aus einem Umkehr-Vorgerüst und aus einer sich daran anschließenden Tandem-Gerüstgruppe bestehend aus einem Universal-Reversier-Vorgerüst und einem zugeordneten Flanschen-Stauchgerüst sowie aus einem separaten Universal-Fertiggerüst. Das bei konventionellen Trägerstraßen separat stehende Fertiggerüst ist vorschlagsweise an die Universal-Arbeitsgerüstgruppe herangerückt worden. Das Universal-Fertiggerüst ist allerdings während der Reversier-Vorwalzstiche geöffnet und steht nicht im Walzkontakt mit dem Formstahl. Nur für den letzten Durchgang des Formstahls wird das Universal-Fertiggerüst auf das Fertigmaß eingestellt, so daß - der Fertigstich im Universal-Fertiggerüst gewalzt wird. Beim reversierenden Vorwalzen bestimmter Formstähle, die nicht durch ein geöffnetes Universal-Fertiggerüst durchgeführt werden können, wurde vorgeschlagen, das Fertiggerüst während des Vorwalzens seitlich der Walzlinie anzuordnen und erst zum Fertigstich in die Walzlinie einzurücken. Nachteilig hierbei ist, daß das Umformpotential des Fertiggerüsts nur unzulänglich ausgenutzt wird, das heißt, wie bei anderen konventionellen Walzwerken, lediglich für einen Stich, nämlich den Fertigstich. Nachteilig ist ferner, daß die Reproduzierbarkeit der Walzspalteinstellung nicht ausreichend ist, um die heute üblichen Toleranzanforderungen an Trägerprofile zu erfüllen, wenn der Walzspalt des Universal-Fertiggerüsts erst zum letzten Fertigstich zugestellt wird.Such a method, corresponding to the genus, for producing shaped steel is known from the prior publication JP-A 56 109101. The aforementioned prior publication describes a girder mill consisting of a reversing roughing stand and an adjoining tandem stand group consisting of a universal reversing roughing stand and an associated flange-upsetting stand as well as a separate universal finishing stand. The prefabricated stand, which is separate from conventional girder mills, has been moved to the universal work scaffold group. However, the universal finishing stand is open during the reversing roughing pass and is not in rolling contact with the form steel. The universal finishing stand is set to the finished size only for the last pass of the section steel, so that - the finish stitch is rolled in the universal finishing stand. In the case of reversing roughing of certain shaped steels, which cannot be carried out by an open universal finishing stand, it was proposed that the finishing stand be to the side of the during roughing Arrange the rolling line and only move into the rolling line for the finish stitch. The disadvantage here is that the forming potential of the finishing stand is exploited only inadequately, that is, as in other conventional rolling mills, only for one pass, namely the finish pass. A further disadvantage is that the reproducibility of the roll gap setting is not sufficient to meet the tolerance requirements for carrier profiles that are common today if the roll gap of the universal finishing stand is only delivered to the last finishing pass.

Ein weiteres, der Gattung entsprechendes Verfahren zur Herstellung von Formstahl ist in der vorbekannten Veröffentlichung JP-A 59-45003 erwähnt. In dieser Veröffentlichung sollen die Nachteile des zuvor dargestellten Herstellungsverfahren von Formstahl beseitigt werden, da bei diesem Walzwerk bekannt geworden war, daß der Spalt im Universal-Fertiggerüst unmöglich auf einem konstanten Wert gehalten werden kann und dies die Präzision der fertiggewalzten Produkte mindert. Deshalb wurde in der hier genannten Veröffentlichung JP-A 59-45003 vorgeschlagen, das Universal-Fertiggerüst erst am Ende des Umformprozesses mit einer separaten Verschiebevorrichtung in die Walzlinie zu bringen. Der Nachteil dieser Maßnahme besteht gleichfalls darin, daß das Universal-Fertiggerüst nur für den letzten Stich, den Fertigstich genutzt wird und ansonsten im Stand-by außerhalb der Walzlinie steht.Another method corresponding to the genus for producing shaped steel is mentioned in the previously known publication JP-A 59-45003. In this publication, the disadvantages of the previously described manufacturing process for shaped steel are to be eliminated, since it had become known in this rolling mill that the gap in the universal finishing stand could not possibly be kept at a constant value and this would reduce the precision of the finished rolled products. Therefore, it was proposed in the publication JP-A 59-45003 mentioned here that the universal finishing stand should only be brought into the rolling line with a separate displacement device at the end of the forming process. The disadvantage of this measure is also that the universal finishing stand is only used for the last stitch, the finishing stitch and is otherwise in stand-by outside the rolling line.

Bei einem anderen Formstahl-Herstellungsverfahren gemäß der JP-A 58-90301 wird der Formstahl in einer Tandem-Gerüstgruppe bestehend aus Universal-Arbeitsgerüst, Flanschen-Stauchgerüst und Universal-Fertiggerüst umgeformt. Nur das Universal-Arbeitsgerüst und das Flanschen-Stauchgerüst sind reversierend arbeitende Vorgerüste. Das Universal-Fertiggerüst ist während der Umformung geöffnet. Der Formstahl wird währenddessen durch den geöffneten Walzspalt des Fertiggerüsts hindurchgeführt. Erst beim letzten Stich, dem Fertigstich wird der Walzspalt des Universal-Fertiggerüsts zugestellt und der Formstahl wird im Hingang einem einzigen letzten Stich unterzogen. In dem Universal-Arbeitsgerüst und in dem Flanschen-Stauchgerüst wird der Formstahl bekannterweise mit X-Stichen vorgeformt; erst im letzten Fertigstich werden die Flanschen in die H-Form gerichtet. Abgesehen davon, daß wie bei den zuvor als vorbekannt beschriebenen Walzwerken das Umformpotential des Universal-Fertiggerüst nur unzulänglich genutzt wird, ist das Vorwalzen des Formstahls ausschließlich mit X-Stichen nachteilig für die Gefügeausbildung im Übergang vom Steg zum Flansch.In another form steel manufacturing process according to JP-A 58-90301, the form steel is formed in a tandem stand group consisting of a universal work stand, a flange compression stand and a universal finishing stand. Only the universal working scaffold and the flanged compression stand are reversing working scaffolds. The universal finishing stand is open during the forming process. In the meantime, the form steel is passed through the opened roll gap of the finishing stand. The roll gap of the universal finishing stand is not moved until the last stitch, the finish stitch, and the shaped steel is subjected to a single final stitch in the entrance. As is known, the shaped steel is preformed with X-stitches in the universal working scaffold and in the flange compression scaffold; the flanges are only directed into the H-shape in the final stitch. Apart from the fact that, as in the rolling mills previously described as previously known, the forming potential of the universal finishing stand is only insufficiently used, the pre-rolling of the shaped steel with X-stitches is disadvantageous for the microstructure formation in the transition from the web to the flange.

Bei einem Verfahren zum Walzen von Doppel-T-Trägern nach der DE-A 14 27 874 ist eine Dreier-Tandem-Gerüstgruppe beschrieben, die aus zwei Universal-Arbeitsgerüsten und einem Flanschen-Stauchgerüst besteht, wobei das Stauchgerüst zwischen den Universalgerüsten angeordnet ist und diese Dreier-Tandemgruppe im Reversierbetrieb arbeitet. Der Formstahl wird in dieser Tandem-Gerüstgruppe reversierend vorgewalzt. Anschließend wird der Formstahl in einem nicht reversierend betriebenen Universal-Fertiggerüst fertiggewalzt, welches in einem größeren Abstand zu der genannten Vorgerüstgruppe steht. In der Vorgerüstgruppe wird der Formstahl entweder ausschließlich X-Stichen oder ausschließlich H-Stichen unterzogen, was nachteilig für die Gefügeausbildung im Übergang vom Steg zum Flansch ist. Nachteilig bei diesem vorbekannten Walzwerk ist auch die große Baulänge und der Umstand, daß das Fertiggerüst nur für einen einzigen Stich, den Fertigstich herangezogen wird, während es beim Reversierbetrieb der Vorgerüstgruppe im Stand-by in Walzlinie ungenutzt steht.In a method for rolling double T-beams according to DE-A 14 27 874, a triple tandem stand group is described, which consists of two universal work stands and a flanged compression stand, the compression stand being arranged between the universal stands and this triple tandem group works in reverse operation. The shaped steel is pre-rolled in this tandem stand group. The shaped steel is then finish-rolled in a non-reversing universal finishing stand, which is at a greater distance from the roughing stand group mentioned. In the roughing stand group, the section steel is subjected to either only X-stitches or only H-stitches, which is disadvantageous for the structure formation in the transition from the web to the flange. A disadvantage of this known rolling mill is the large length and the fact that the finishing stand is only used for a single pass, the finishing pass, while it is idle in the stand-by in the rolling line during reversing operation of the roughing stand group.

Die Erfindung geht von der Aufgabe aus, ein Verfahren zur Herstellung von Formstahl der eingangs bezeichneten Gattung zu schaffen, durch welches sowohl der Raumbedarf als auch der erforderliche Aufwand gering gehalten wird und gleichwohl die Umformleistung durch bessere Ausnutzung aller im Walzwerk angeordneten Walzgerüste erhöht wird.The invention is based on the object of providing a method for producing shaped steel of the type mentioned at the outset, by means of which both the space requirement and the required outlay are kept low and the forming capacity is nevertheless increased by better utilization of all the rolling stands arranged in the rolling mill.

Gelöst wird diese Aufgabe durch die im Patentanspruch 1 gekennzeichneten Merkmale, wonach die Tandem-Gerüstgruppe als Umkehr-Tandem-Gerüstgruppe simultan reversierend reduzierend arbeitet und in die Herstellung des Formstahls das Universal-Fertiggerüst bei allen Reduktionsstichen reversierend einbezogen wird und auch der letzte Fertigstich in diesem Universal-Fertiggerüst durchgeführt wird und das Universal-Fertiggerüst während der reversierenden Reduktion des Formstahls für eine geringere Reduktion eingestellt wird als das Universal-Arbeitsgerüst. Abgesehen davon, daß die übliche Fertiggruppe und deren anteilige Rollgänge entfallen können, ersetzt das in die Umkehr-Tandem-Gerüstgruppe einbezogene Universal-Fertiggerüst das üblicherweise in einer Dreier-Tandem-Gruppe angeordnete reversierend arbeitende Universal-Arbeitsgerüst und wird ein reversierend arbeitendes Universal-Fertiggerüst. Damit aber wird das Fertiggerüst, das je Walzgutlänge nur einen Stich geringer Reduktion bislang durchgeführt hat und damit nur mäßig genutzt worden ist, in die Umkehr-Tandem-Gruppe übernommen und durch Beteiligung am Umkehrbetrieb wesentlich stärker genutzt. Seine speziellen Funktionen vermag es jedoch auch bei dieser stärkeren Nutzung durchzuführen. So entsteht ein Verfahren zur Herstellung von Formstahl, das durch weitgehende Ausnutzung aller Gerüste eine besonders hohe Durchssatzleistung in Anbetracht des erforderlichen Aufwandes ergibt.This object is achieved by the features characterized in claim 1, according to which the tandem scaffolding group works simultaneously as a reversing tandem scaffolding group in a reversing, reducing manner and the universal finishing stand is included in the production of the shaped steel in a reversing manner in all reduction stitches, and also the last finishing stitch in this Universal finishing stand is carried out and the universal finishing stand is set for a smaller reduction than the universal working stand during the reversing reduction of the shaped steel. In addition to the fact that the usual finishing group and its partial roller tables can be omitted, the universal finishing stand included in the reversing tandem stand group replaces the reversing working universal working stand, which is usually arranged in a three-way tandem group, and becomes a reversing working universal finishing stand . However, this means that the finishing stand, which up to now has only carried out a slight reduction per roll length and has therefore only been used moderately, is transferred to the Reverse Tandem Group and is used much more by participating in the reverse operation. However, it can also perform its special functions with this increased use. The result is a process for the production of shaped steel which, through extensive use of all scaffolding, results in a particularly high throughput capacity in view of the effort required.

Vorteilhafte und zweckmäßige Weiterbildungen des Gegenstandes des Anspruchs 1 sind den Unteransprüchen zu entnehmen.Advantageous and expedient developments of the subject matter of claim 1 can be found in the subclaims.

Im einzelnen sind die Merkmale der Erfindung anhand der folgenden Beschreibung von Ausführungsbeispielen in Verbindung mit diese darstellenden Zeichnungen erläutert. Es zeigen hierbei:

Figur 1
schematisch ein herkömmliches Formstahl-Walzwerk hoher Leistung,
Figur 2
in gleichartiger Darstellung ein Formstahl-Walzwerk gemäß der Erfindung und
Figur 3
das Formstahl-Walzwerk in ausführlicher schematischer Darstellung.
The features of the invention are explained in detail on the basis of the following description of exemplary embodiments in conjunction with the drawings which illustrate them. They show:
Figure 1
schematically a conventional high-performance shaped steel rolling mill,
Figure 2
in a similar representation, a shaped steel rolling mill according to the invention and
Figure 3
the shaped steel rolling mill in a detailed schematic representation.

In der Fig. 1 ist ein herkömmliches Formstahl-Walzwerk schematisch dargestellt.In Fig. 1, a conventional steel mill is shown schematically.

Beispielsweise in einem nicht dargestellten Stoßofen aufgeheizte Blöcke werden in einem Umkehr-Vorgerüst 1, das als Zwei-Walzen-Gerüst ausgeführt ist, in einer Anzahl von Stichen, meist zwischen sieben und fünfzehn Stichen, vorgewalzt. Der Vorformling wird an eine Umkehr-Tandem-Gerüstgruppe 2 weitergegeben, die aus einem Universal-Arbeitsgerüst 4, einem Flanschen-Stauchgerüst 5 sowie einem Universal-Arbeitsgerüst 6 besteht. Durch wiederholtes Walzen in drei bzw. fünf Durchläufen wird das gewünschte Profil weitgehend angenähert. Nach dem letzten Durchlauf bzw. während des letzten Durchlaufes tritt das Walzgut in eine Fertig-Gerüstgruppe 3 ein, in der mittels eines Flanschen-Stauchgerüstes 7 nochmals die Trägerflansche auf die exakte Sollbreite gebracht werden, während das Universal-Fertiggerüst 8 die Endform des Profiles sowie die Oberflächengüte des Walzgutes bestimmt.For example, blocks heated in a pusher furnace, not shown, are pre-rolled in a reversing roughing stand 1, which is designed as a two-roll stand, in a number of passes, usually between seven and fifteen passes. The preform is passed on to a reversing tandem scaffold group 2, which consists of a universal work scaffold 4, a flange compression scaffold 5 and a universal work scaffold 6. The desired profile is largely approximated by repeated rolling in three or five passes. After the last pass or during the last pass, the rolling stock enters a finished stand group 3, in which the support flanges are brought to the exact desired width again by means of a flange-upsetting stand 7, while the universal finishing stand 8, the final shape of the profile and determines the surface quality of the rolling stock.

Zum Umkehr-Vorgerüst 1 führt ein Einlauf-Rollgang 9, zwischen diesem und der Umkehr-Tandem-Gerüstgruppe 2 ist ein Zuführrollgang 10 vorgesehen, der Umkehr-Tandem-Gerüstgruppe 2 folgt ein Übergabe-Rollgang 11, und der Fertiggerüstgruppe 3 ist ein Auslaufrollgang 12 nachgeordnet, der bspw. zu einem Kühlbett führt.An infeed roller table 9 leads to the reversing roughing stand 1, a feed roller table 10 is provided between it and the reversing tandem stand group 2, the reversing tandem stand group 2 is followed by a transfer roller table 11, and the finishing stand group 3 is an outfeed roller table 12 downstream, which leads, for example, to a cooling bed.

Die Bewegungsrichtungen des Walzgutes bei beispielhaft angenommenen Durchläufen sind durch Pfeile angedeutet; fünf Pfeile 13 betreffen das Vorwalzen, das eigentliche Auswalzen wird durch Pfeile 14 und 15 angedeutet, wobei Pfeil 15 gleichzeitig den Stauch- und Universalstich der Fertig-Gerüstgruppe 3 mit angibt.The directions of movement of the rolling stock in passages assumed as examples are indicated by arrows; five arrows 13 relate to roughing, the actual rolling out is indicated by arrows 14 and 15, arrow 15 simultaneously indicating the upsetting and universal stitch of the finished stand group 3.

Sowohl das Umkehr-Vorgerüst 1 als auch die Umkehr-Tandem-Gerüstgruppe 2 werden zur Umformung durch das Reversieren stark herangezogen und damit optimal genutzt. Nur das Flanschen-Stauchgerüst 7 und das Universal-Fertiggerüst 8 werden nur für eine sehr geringe Reduktion eingesetzt und dienen mehr der Sicherung gewünscht enger Toleranzen des erzielten Profiles sowie der Oberflächengüte des Walzgutes.Both the reversing roughing stand 1 and the reversing tandem stand group 2 are heavily used for the forming by reversing and thus optimally used. Only the flanging mill 7 and the universal finishing stand 8 are used only for a very small reduction and are more used to secure the desired narrow tolerances of the profile obtained and the surface quality of the rolling stock.

Zur besseren Ausnutzung aller Gerüste wird die Anordnung nach Fig. 2 eingesetzt. Auch hier wird das Vorwalzen von Block zum Vorprofil durch ein Umkehr-Vorgerüst 1 bewirkt, das durch eine Vielzahl von Stichen, beispielsweise fünf bis dreizehn Stichen, eine hohe Umformleistung zuläßt. Die folgende Umkehr-Tandem-Gerüstgruppe weist ein Universal-Arbeitsgerüst 4, ein Flanschen-Stauchgerüst 5 sowie ein Universal-Fertiggerüst 8 auf. Diese drei Gerüste werden ebenfalls weitgehend genutzt, indem mindestens zweimal, gegebenenfalls auch öfter, reversiert wird und damit schon bei zweimaligem Reversieren drei Stauchstiche und sechs Universalstiche erreicht werden. Allerdings wird die Nutzung dieser Umkehr-Tandem-Gerüstgruppe 16 nicht so hoch getrieben wie die der Umkehr-Tandem-Gerüstgruppe 2. Es wurde nämlich als vorteilhaft erkannt, das Universal-Arbeitsgerüst 4 jeweils mit der optimalen Reduktion arbeiten zu lassen, das Fertiggerüst 8 aber mit gegenüber der des Universal-Arbeitsgerüstes 4 verringerter Reduktion zu betreiben. Zusätzlich ist es weiterhin möglich, beim letzten Stich die Anstellung des Universal-Fertiggerüstes 8 so zu bewirken, daß eine weitere Senkung der Reduktion auftritt. Durch die Herabsetzung der durch das Universal-Fertiggerüst 8 bewirkten Reduktion gegenüber der optimalen ergibt sich zwar eine etwas verringerte Umformleistung; andererseits wird hierdurch der Verschleiß der Ballenoberfläche des Universal-Fertiggerüstes 8 gegenüber dem des Universal-Arbeitsgerüstes 4 so herabgesetzt, daß auch nach längerer Zeit noch ausreichende Oberflächengüten erhalten sind und damit auch das auslaufende Walzgut, bestimmt durch die Oberflächenbeschaffenheit der Ballen der Walzen des Universal-Fertiggerüstes 8, auch noch nach längerer Standzeit eine ausgezeichnete Beschaffenheit bzw. Güte aufweisen.The arrangement according to FIG. 2 is used for better utilization of all scaffolding. Here, too, the roughing from block to rough profile is effected by a reversing roughing stand 1, which allows a high forming capacity due to a large number of passes, for example five to thirteen passes. The following reversing tandem scaffolding group has a universal working scaffold 4, a flange upsetting scaffold 5 and a universal finishing scaffold 8. These three scaffolds are also largely used by reversing at least twice, possibly more often, so that three upsetting stitches and six universal stitches can be achieved with just two reversals. However, the use of this reversing tandem scaffolding group 16 is not pushed up as much as that of the reversing tandem scaffolding group 2. It was recognized as advantageous to let the universal working scaffold 4 work with the optimum reduction, but the finishing scaffold 8 with reduced compared to that of the universal work scaffold 4 To operate reduction. In addition, it is also possible to effect the setting of the universal finishing stand 8 at the last stitch so that a further reduction in the reduction occurs. By reducing the reduction brought about by the universal finishing stand 8 compared to the optimal one, there is a somewhat reduced forming capacity; on the other hand, this reduces the wear on the bale surface of the universal finishing stand 8 compared to that of the universal work stand 4 so that sufficient surface qualities are obtained even after a long period of time and thus also the rolling stock that runs out, determined by the surface quality of the bales of the rolls of the universal Finishing stand 8, even after a long standing time, have an excellent quality.

Damit wird gegenüber der bekannten Anordnung nach Fig. 1 praktisch eine Fertiggerüst-Gruppe mit den dieser zugeordneten Rollgängen ebenso eingespart wie der durch diese in Anspruch genommene Platz. Die gesamte umformerische Leistung mag geringfügig abgesenkt sein, da zwar das Universal-Arbeitsgerüst 4 optimal, das Universal-Fertiggerüst 8 aber nur zu einem Teil seiner optimalen Umformleistung genutzt werden. Tatsächlich entfällt aber noch der gesonderte Durchlauf einer gesonderten Fertig-Gerüstgruppe. Es ist zwar auch bekanntgeworden, den Übergabe-Rollgang 11 so kurz auszuführen, daß bei der nach dem letzten Stich des Universal-Arbeitsgerüstes 6 erreichten Länge des Walzgutes dessen Kopf bereits in die Fertig-Gerüstgruppe einläuft, ehe dessen Ende das Universal-Arbeitsgerüst 6 verlassen hat. Zu einer stoßfreien Übergabe ist aber eine weitere Regelanordnung erforderlich, auf die bei erfindungsgemäß ausgebildeten Formstahl-Walzwerken, beispielsweise nach Fig. 2, verzichtet werden kann. Dort ist es nur empfehlenswert, das Universalarbeitsgerüst 4, das Flanschen-Stauchgerüst 5 und das Universal-Fertiggerüst 8 nach dem Prinzip des Minimalzuges zu regeln, um die jeweils auftretenden Beanspruchungen gering zu halten.Compared to the known arrangement according to FIG. 1, a group of finishing stands with the roller tables assigned to them is practically saved, as is the space they occupy. The total forming capacity may be slightly reduced, because although the universal work stand 4 is used optimally, the universal finishing stand 8 is only used to a part of its optimal forming capacity. In fact, there is no need to go through a separate prefabricated scaffolding group. It has also become known to make the transfer roller table 11 so short that when the length of the rolling stock reached after the last stitch of the universal work stand 6, its head already runs into the finished stand group before its end leaves the universal work stand 6 Has. For a bumpless transfer, however, a further control arrangement is required, which can be dispensed with in the case of shaped steel rolling mills designed according to the invention, for example according to FIG. 2. There it is only advisable to regulate the universal work scaffold 4, the flange compression scaffold 5 and the universal finishing scaffold 8 according to the principle of the minimum pull in order to keep the stresses that occur in each case low.

Eine praktische Ausführung des kompakten Formstahl-Walzwerkes hoher Leistung is in der Fig. 3 schematisch aufgezeigt.A practical embodiment of the compact, high-performance shaped steel rolling mill is shown schematically in FIG. 3.

Hier ist der Blöcke aufheizende Stoßofen 17 mit seinen Beschickungsvorrichtungen ebenso dargestellt wie ein ihm nachgeorneter Entzunderer 18. Die aufgeheizten und entzunderten Blöcke werden über einen Einlaufrollgang 9 dem Umkehr-Vorgerüst 1 zugeführt, dem eine Walzen-Schnellwechselvorrichtung 19 zugeordnet und Kant- und Verschiebevorrichtungen 20 vor und nachgeordnet sind. Die Vorprofile werden der Umkehr-Tandem-Gerüstgruppe 16 über einen Zuführrollgang 10 zugebracht, der mit einer Schopfsäge 21 ausgestattet ist. Den Gerüsten 4, 5 und 8 dieser Gruppe ist eine Gerüstwechseleinrichtung 22 zugeordnet, welche den Austausch der Gerüste gegen aufgearbeitete Gerüste erlaubt, wobei wahlweise für den Duo- oder den Universal-Betrieb vorgesehene Gerüste einbaubar sind. Ein nachgeordneter Auslaufrollgang 12 führt über eine beispielsweise zum Teilen von Knüppeln einsetzbare Wannschere 23 zu einem Kühlbett 24.Here, the block-heating pusher furnace 17 with its loading devices is shown as well as a descaler 18 after it. The heated and descaled blocks are fed via an infeed roller table 9 to the reversing roughing stand 1, to which a roller quick-change device 19 is assigned and edging and shifting devices 20 in front and are subordinate. The preliminary profiles are fed to the reversing tandem stand group 16 via a feed roller table 10 which is equipped with a cropping saw 21. The scaffolding 4, 5 and 8 of this group is assigned a scaffolding changing device 22 which allows the scaffolding to be exchanged for refurbished scaffolding, it being possible to install scaffolding intended for duo or universal operation. A downstream run-out roller table 12 leads to a cooling bed 24 via a tub shear 23, which can be used, for example, for dividing billets.

In der Praxis hat es sich gezeigt, daß ein derartiges kompaktes Formstahl-Walzwerk durchaus die Leistung von wesentlich aufwendigeren vorbekannten Walzwerken ergibt, so daß gemäß der Erfindung der zu treibende Aufwand erheblich absenkbar ist. Der Leistungsabfall, der durch die empfehlenswerte Absenkung der Umformleistung des Universal-Fertiggerüstes auftritt, läßt sich im Bedarfsfalle leicht durch ein weiteres zusätzliches Reversieren ausgleichen.In practice, it has been shown that such a compact shaped steel rolling mill definitely gives the performance of much more complex previously known rolling mills, so that, according to the invention, the effort to be driven can be reduced considerably. The drop in performance that occurs due to the recommended reduction in the forming capacity of the universal finishing stand can easily be compensated for by another additional reversing if necessary.

Üblicherweise sind in Umkehr-Tandem-Gerüstgruppen die Vertikalwalzen der Universal-Arbeitsgerüste leicht doppelkonisch so ausgeführt, daß ihre Ballen von ihren Mittelebenen zu ihren Walzenzapfen hin sich verjüngen. Die hier gewalzten Profile weisen leicht nach außen abgekantete Flanschhälften auf, so daß von "X"-Vorprofilen gesprochen wird, und erst das Universal-Fertiggerüst enthält im wesentlichen zylindrische Walzenballen, so daß die Flanschhälften eine gemeinsame äußere Ebene erhalten und man das gewünschte "H"-Profil erhält. Es wurde als vorteilhaft erkannt, das Universal-Arbeitsgerüst 4 mit doppelkonischen Walzen und das Universal-Fertiggerüst 8 mit zylinderförmigen Vertikalwalzen auszustatten, so daß beim Reversieren jeweils zwei Stiche in "H"-Form, die folgenden beiden in "X"-Form, und der letzte Stich in "H"-Form gefahren werden. Hierdurch wird zusätzliche eine weitere empfehlenswerte Durchknetung des Flanschwurzelbereiches erzielt.Usually, in reverse tandem stand groups, the vertical rolls of the universal work stands are slightly double-conical in such a way that their bales taper from their central planes to their roll neck. The profiles rolled here have flange halves slightly bent outwards, so that one speaks of "X" pre-profiles, and only the universal finishing stand contains essentially cylindrical roller balls, so that the flange halves receive a common outer plane and the desired "H "Profile. It was recognized as advantageous to equip the universal work stand 4 with double-conical rollers and the universal finishing stand 8 with cylindrical vertical rollers, so that when reversing two stitches in "H" shape, the following two in "X" shape, and the last stitch in "H" shape. As a result, a further recommended kneading of the flange root area is achieved.

Claims (3)

  1. Method of manufacturing structural steel in a structural steel rolling mill with a two-high reversing roughing stand and with a universal working stand, a flange-edging stand as well as a universal finishing stand, which is provided at the exit end, combined into a tandem stand group, characterised thereby that the tandem stand group operates reversingly and reducingly simultaneously as a reversing tandem group and in the manufacture of structural steel the universal finishing stand is included reversingly in all reduction passes and also the last finishing pass is performed in this universal finishing stand and that during the reversing reduction of the structural steel in the reversing tandem stand group the universal finishing stand is set for a smaller reduction than the universal working stand.
  2. Method according to claim 1, characterised thereby that the reduction per pass of the universal finishing stand amounts to 15% to 55% of that of the universal working stand.
  3. Method according to claim 1 or 2, characterised thereby that each time two successive passes in H-shape, then an edging pass for the flanges and the respectively following passes in X-shape and the last pass in H-shape take place for the reversing reduction of the structural steel.
EP87111183A 1986-08-16 1987-08-03 Method of producing sections Expired - Lifetime EP0256409B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87111183T ATE56895T1 (en) 1986-08-16 1987-08-03 SHAPED STEEL ROLLING MILL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3627729 1986-08-16
DE3627729A DE3627729C2 (en) 1986-08-16 1986-08-16 Molded steel rolling mill

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EP0256409A2 EP0256409A2 (en) 1988-02-24
EP0256409A3 EP0256409A3 (en) 1988-06-08
EP0256409B1 EP0256409B1 (en) 1990-09-26
EP0256409B2 true EP0256409B2 (en) 1996-09-18

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JP (1) JPH0683845B2 (en)
KR (1) KR930004990B1 (en)
CN (1) CN1008796B (en)
AT (1) ATE56895T1 (en)
BR (1) BR8704230A (en)
CA (1) CA1306124C (en)
CZ (1) CZ280934B6 (en)
DE (2) DE3627729C2 (en)
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RU (1) RU1829972C (en)
SK (1) SK278760B6 (en)
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US5664452A (en) * 1909-11-04 1997-09-09 Sms Schloemann-Siemag Aktiengesellschaft Method of rolling finished sections from a preliminary section in a reversing rolling stand arrangement
DE3636478C2 (en) * 1986-10-27 1996-10-31 Schloemann Siemag Ag Process for rolling finished profiles from a preliminary profile
DE3730471A1 (en) * 1987-09-11 1989-03-23 Schloemann Siemag Ag COMPACT ROLLING MILL AND WORKING METHOD FOR ROLLING MOLDED STEEL
DE3830101A1 (en) * 1988-09-05 1990-03-15 Schloemann Siemag Ag METHOD FOR OPERATING A STEEL ROLLING MILL WITH A REFRIGERATION LINE ARRANGED ON A ROLLING LINE FOR THERMOMECHANICAL FINISHED ROLLS AND ROLLING STEEL ROLLING MILL FOR IMPLEMENTING THE METHOD
DE3834587A1 (en) * 1988-10-11 1990-04-12 Schloemann Siemag Ag METHOD AND DEVICE FOR ADJUSTING AND CHANGING THE HEIGHT OF THE CONTINUOUS LEVEL OF THE ROLLING MATERIAL BY ROLLING THE ROLLING DEVICES OF A MOLDING STEEL ROLLER
JP2712846B2 (en) * 1991-02-08 1998-02-16 住友金属工業株式会社 Rolling method and rolling device for section steel
EP0535767B1 (en) * 1991-10-02 1996-02-07 MANNESMANN Aktiengesellschaft Rolling train for rolling section beams
US5511303A (en) * 1992-05-12 1996-04-30 Tippins Incorporated Intermediate thickness and multiple furnace process line
ES2182966T3 (en) * 1995-03-17 2003-03-16 Sumitomo Metal Ind PROCEDURE AND DEVICE OF HOT STEEL ROLLING WITH PROFILE IN THE FORM OF H.
DE19622740A1 (en) * 1996-06-07 1997-12-11 Schloemann Siemag Ag Method for operating a roll stand system
DE19628369A1 (en) * 1996-07-13 1998-01-15 Schloemann Siemag Ag Process for rolling finished profiles from a preliminary profile
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DE19747656A1 (en) * 1997-10-29 1999-05-12 Schloemann Siemag Ag Rolling system for rolling all types of finished profiles
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ITMI20021594A1 (en) * 2002-07-19 2004-01-19 Danieli Off Mecc METHOD AND SYSTEM FOR HOT ROLLING OF RAILS
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IT1397191B1 (en) * 2009-12-01 2013-01-04 Siemens Vai Metals Tech Srl UNIVERSAL REVERSIBLE TRAIN COMPACT FOR THE PRODUCTION OF LARGE MEDIUM PROFILES.
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RU2620212C1 (en) * 2016-03-10 2017-05-23 Общество с ограниченной ответственностью "Инновационные металлургические технологии" (ООО "ИНМЕТ") Method of manufacturing flange beam and casting and rolling complex for its implementation
CN105689390A (en) * 2016-03-10 2016-06-22 天津市中重科技工程有限公司 Method for rolling section steel semi-continuously by using compact type universal rolling mills
CN110814023A (en) * 2019-11-13 2020-02-21 天津市中重科技工程有限公司 Rolling process of large and super-large section steel in double-reversible finish rolling area
RU2758605C1 (en) * 2020-08-05 2021-11-01 Акционерное общество "ЕВРАЗ Нижнетагильский металлургический комбинат" (АО "ЕВРАЗ НТМК") Method for manufacturing a hot-rolled i-beam from a shaped blank

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RU1829972C (en) 1993-07-23
EP0256409A2 (en) 1988-02-24
KR930004990B1 (en) 1993-06-11
ES2017975B3 (en) 1991-03-16
DE3765210D1 (en) 1990-10-31
DE3627729A1 (en) 1988-02-25
SK571787A3 (en) 1998-02-04
CA1306124C (en) 1992-08-11
EP0256409A3 (en) 1988-06-08
US4791799A (en) 1988-12-20
KR880002585A (en) 1988-05-10
CN1008796B (en) 1990-07-18
CZ571787A3 (en) 1993-08-11
UA15926A (en) 1997-06-30
BR8704230A (en) 1988-04-12
CZ280934B6 (en) 1996-05-15
ZA874710B (en) 1988-01-07
SK278760B6 (en) 1998-02-04
ATE56895T1 (en) 1990-10-15
EP0256409B1 (en) 1990-09-26
ES2017975T5 (en) 1996-11-16
DE3627729C2 (en) 1996-03-07
JPH0683845B2 (en) 1994-10-26
JPS6352701A (en) 1988-03-05
CN87105575A (en) 1988-03-23

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