EP0757599B1 - Process and device for rolling beams from preliminary sections - Google Patents

Process and device for rolling beams from preliminary sections Download PDF

Info

Publication number
EP0757599B1
EP0757599B1 EP95913855A EP95913855A EP0757599B1 EP 0757599 B1 EP0757599 B1 EP 0757599B1 EP 95913855 A EP95913855 A EP 95913855A EP 95913855 A EP95913855 A EP 95913855A EP 0757599 B1 EP0757599 B1 EP 0757599B1
Authority
EP
European Patent Office
Prior art keywords
stand
universal
breakdown
rolling
roughing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95913855A
Other languages
German (de)
French (fr)
Other versions
EP0757599A1 (en
Inventor
Werner Dipl.-Ing. Henneberger
Hans Sturm
Rudolf Mertens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0757599A1 publication Critical patent/EP0757599A1/en
Application granted granted Critical
Publication of EP0757599B1 publication Critical patent/EP0757599B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B21B1/08—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
    • 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
    • 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

Definitions

  • the invention relates to a method and an apparatus for rolling of beams from pre-profiles on a rolling mill consisting of a Roughing stand and a compact group of two arranged behind it Universal rolling stands with flanged compression stands arranged in between, whereby the outlet-side universal roll stand as a finishing stand is trained.
  • a generic rolling mill is from European patent 02 65 757 known. This known rolling mill is used to roll finished profiles from pre-profiles that come from a continuous caster. In the Description of this prior art is pointed out that the Dimensions of the pre-profiles leaving the continuous casting device by the Mold dimensions are largely determined, so that the rolling mill to Rolling out these pre-profiles to be matched to this continuous casting profile got to.
  • the known solution was looking for a way out of this Continuous casting profile on one and the same rolling mill with finished profiles significantly larger final dimension differences than before and suggests those pre-profiles that are not directly in the Compact rolling group can be rolled out in the front of the Compact roll group arranged, designed as a compression mill reducing pre-deforming.
  • the object of the present invention is to provide a method for rolling Propose beams from pre-profiles, the waiver of the heavy breakdown scaffolding an economical manufacture of beams enables without the flexibility and variety of dimensions of the restrict rolling beams.
  • a corresponding adjustment of the Roll stands are another object of the invention.
  • the invention proposes that for at least one breakdown stitch that is designed as a vertical scaffold Roughing stand, the first universal stand and the flange compression stand as Breakdown group are used, the following the Breakdown stitches one or more pre-stitches on the first Universal scaffold and the flange compression scaffold are performed before at least one finish stitch on the universal scaffold on the outlet side is performed.
  • the Lifting up from the roughing stand, but also an additional one Reduction of the web can be made.
  • the first Universal roll stand made an empty run of the Upset rolling of the flange upset in the web area enables.
  • one is placed on the three scaffolds arranged one behind the other optimal breakdown rolling made by the adjustability the scaffolding great flexibility when using the pre-profiles, as well as the variety of rollable finished profiles.
  • the present invention used in departure from the teaching of the prior art Technology always in context and simultaneously with the first universal scaffold and the flange compression scaffold of Compact rolling group, whereby only those aimed at by the invention Results are achieved.
  • the roughing is done after the universal breakdown rolling exclusively on the first universal and flange compression stand the compact rolling group, d. H. without using the pre and Universal finishing stand in one or more stitches; the finishing stand is used exclusively for finish rolling.
  • a variant of the invention which is also more flexible This enables the road and significantly increases production characterized in that the roughing stand as reversible Universal breakdown scaffolding group, consisting of a universal scaffolding is formed with an immediately subsequent vertical compression frame and used to perform multiple breakdown stitches several preliminary stitches using the first universal scaffolding and of the flange upsetting stand and at least one finish stitch on the Connect the universal scaffold on the outlet side.
  • the roughing stand as reversible Universal breakdown scaffolding group, consisting of a universal scaffolding is formed with an immediately subsequent vertical compression frame and used to perform multiple breakdown stitches several preliminary stitches using the first universal scaffolding and of the flange upsetting stand and at least one finish stitch on the Connect the universal scaffold on the outlet side.
  • a rolling mill known from EP-A 0265 757 for rolling beams Pre-profiles, in particular continuous casting profiles with a roughing stand and one behind it arranged compact group consisting of two universal scaffolds with in between arranged flange-compression frame, in which the outlet-side universal frame is designed as a finishing stand, is further developed according to the invention in that the Roughing stand as a reversible universal breakdown scaffolding group, consisting of one Universal scaffold with immediately following compression frame and is designed as Universal scaffolding of the universal breakdown scaffolding group with a combination scaffold optional universal roller set and duo roller set can be used.
  • the universal breakdown scaffolding group can also be used as a roughing stand Profilstrasse can be used if desired.
  • the Horizontal rolls of the universal roll set, and the vertical rolls of the Compression frame of the universal breakdown scaffolding group at upright have rolled rolls standing upright rolled bales.
  • This itself atypical training of the universal roll stand makes this cheaper, because the elaborate profile grinding of the horizontal rollers is not necessary.
  • the smooth ones Rolls upset the flanges of the upright beams while the Flange edges with the vertically arranged upsetting rollers of the Edging stand are processed, which are also smooth rolled bales exhibit.
  • the vertical rollers in the universal stand reduce the web and keep the chamber size at the same time.
  • the universal breakdown scaffolding group makes one Rolling mill with high flexibility and lower investment volume created because the universal breakdown scaffolding group is cheaper is to create as a heavy breakdown framework with the extreme expensive caliber rolls. Compared to the latter, there is also the significant advantage of great flexibility and variability, both when Carrier rolls, even if the mill operator intends to To produce profiles on his rolling mill.
  • the roughing stand provided with vertical rollers is one Rolling mill according to the invention referred to rolling beams.
  • the compact rolling group is directly adjacent to the roughing stand VE, consisting of the first universal scaffold U1, the one designated HE Flange compression stand with horizontal compression rollers and the Universal finishing stand UF.
  • the inventive method for example two breakdown stitches in the VE roughing stand, Universal rolling stand U1 and flange compression stand HE driven, as in Figure 1 is represented by the crosses in the usual way.
  • the Universal finishing stand UF is for free passage of the rolling stock open.
  • the rolling stock passes through in reverse operation three preliminary stitches in the first universal scaffold U1 and flange compression scaffold HE before the universal finishing stand UF - moved to the final stitch - is used.
  • FIG 2 is roughly schematically indicated how the Breakdown sequence expires.
  • the upper illustration is based on the Dashed lines can be seen schematically, as by the action of Vertical rolling on the preliminary profile according to the direction of the arrow; a Reduction of the chamber dimension 2 as well as a thickening of the web 3 takes place.
  • the illustration below is schematic the first universal scaffold U1 shown, the preliminary profile 1 immediately goes through on it.
  • the horizontal universal roller 4 Web 3 reduced back to its original size or below while at the same time the flanges are further compressed.
  • the sequence according to the invention applies to all breakdown stitches the preliminary profile optimally compressed and guided in every respect, so that with great flexibility an adaptation of the previous profiles to the further rolling passes is made possible, and good dimensional accuracy of the Finished profiles can be expected, as was previously only possible using the Breakdown scaffolding was possible.
  • FIG Universal breakdown scaffolding group UBD is used. This exists from the universal scaffold U and the compression scaffold E, to which the Compact rolling group, consisting of the first universal stand U1, the Flange compression stand HE and the universal stand UF.
  • Figure 3 shows the sequence of the breakdown rolling in the usual representation, in which the preliminary profile is reversed in three passes through the Universal scaffold U and the compression scaffold E der Universal breakdown scaffolding group is guided.
  • the beam is pre-rolled after the universal breakdown rolling as in the illustration according to FIG. 1 in the first universal frame U1 and the flange upsetting stand HE in three passes with the Universal finishing stand UF, after that it will be The universal finishing stand is closed and the final stitch is carried out.

Landscapes

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

Abstract

The invention relates to a process for rolling beams from preliminary sections, especially continuously cast sections, on a mill train and to a rolling mill for implementing the process. In order to provide a process and rolling mill which permit the economical production of beams without the heavy breakdown stands and without restricting the flexibility and multiplicity of dimensions of the beams to be rolled, the invention proposes that the roughing stand (VE) configured as edging rolls, the first universal stand (U1) and the flange edger (HE) be used as a breakdown group for at least one breakdown pass and that following the breakdown pass(es), one or more roughing passes be performed on the first universal stand (U1) and the flange edger (HE) before at least one finishing pass is performed on the outlet side universal mill stand (UF).

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Walzen von Trägern aus Vorprofilen auf einer Walzstraße, bestehend aus einem Vorgerüst und einer dahinter angeordneten Kompaktgruppe aus zwei Universalwalzgerüsten mit dazwischen angeordnetem Flanschenstauchgerüst, wobei das auslaufseitige Universalwalzgerüst als Fertiggerüst ausgebildet ist.The invention relates to a method and an apparatus for rolling of beams from pre-profiles on a rolling mill consisting of a Roughing stand and a compact group of two arranged behind it Universal rolling stands with flanged compression stands arranged in between, whereby the outlet-side universal roll stand as a finishing stand is trained.

Ein gattungsgemäßes Walzwerk ist aus dem europäischen Patent 02 65 757 bekannt. Dieses bekannte Walzwerk dient zum Walzen von Fertigprofilen aus Vorprofilen, die von einer Stranggießanlage kommen. In der Beschreibung dieses Standes dar Technik wird darauf hingewiesen, daß die Abmaße der die Stranggußeinrichtung verlassenden Vorprofile durch das Kokillenmaß weitgehend festgelegt sind, so daß die Walzstraße zum Auswalzen dieser Vorprofile auf dieses Stranggußprofil abgestimmt sein muß. Die bekannte Lösung suchte nach einer Möglichkeit, aus diesem Stranggußprofil auf ein und derselben Walzstraße Fertigprofile mit bedeutend größeren Endabmessungsunterschieden als bisher zu walzen und schlägt vor, diejenigen Vorprofile, die nicht unmittelbar in der Kompaktwalzgruppe ausgewalzt werden können, in dem vor der Kompaktwalzgruppe angeordneten, als Stauchgerüst ausgebildeten Vorgerüst reduzierend vorzuverformen.A generic rolling mill is from European patent 02 65 757 known. This known rolling mill is used to roll finished profiles from pre-profiles that come from a continuous caster. In the Description of this prior art is pointed out that the Dimensions of the pre-profiles leaving the continuous casting device by the Mold dimensions are largely determined, so that the rolling mill to Rolling out these pre-profiles to be matched to this continuous casting profile got to. The known solution was looking for a way out of this Continuous casting profile on one and the same rolling mill with finished profiles significantly larger final dimension differences than before and suggests those pre-profiles that are not directly in the Compact rolling group can be rolled out in the front of the Compact roll group arranged, designed as a compression mill reducing pre-deforming.

Es wird als nachteilig angesehen, daß durch das mehrfach hintereinander erfolgende Stauchen der Flansche im Stauchgerüst der Steg aufgestaucht und dadurch dicker wird. Spätestens beim nachfolgenden Stauchstich entstehen Probleme dadurch, daß die Stauchwalzen nicht mehr die Flanschkanten stauchen können, weil die Walze am Steg nicht mehr leerläuft. Das Walzen der Flanschbreiten ist aber unbedingt erforderlich, da beim nachfolgenden reinen Universalwalzen das Fertigmaß der Flanschbreite nicht mehr erreicht wird. Das übermäßige Stauchen der Flanschen Ober dem Steg im Vorgerüst kann sogar dazu führen, daß das Kammermaß zwischen den Flanschen zu klein wird, und der so gestauchte Träger nicht in das Universalgerüst eingeführt werden kann. Um das sicher zu verhindern, ist die Zahl der Vorstiche einzuschränken, was wiederum die Variabilität der Anlage beschränkt.It is considered to be disadvantageous that several times in succession the flanges in the upstand of the web are upset and thereby becomes thicker. At the latest with the following upsetting stitch problems arise from the fact that the upsetting rollers no longer have the Flange edges can compress because the roller on the web no longer runs empty. Rolling the flange widths is essential required, because in the subsequent pure universal rolling Finished dimension of the flange width is no longer achieved. The excessive The flanges above the web in the roughing stand can even do this lead that the chamber dimension between the flanges is too small, and the beams that have been compressed in this way cannot be inserted into the universal framework can. To prevent this from happening, the number of pre-stitches restrict, which in turn limits the variability of the system.

Diese Probleme treten bei konventionellen Walzstraßen nicht auf. Sie werden bekanntlich mit sogenannten Breakdown-Gerüsten betrieben, das sind schwere Duo-Walzgerüste mit auf der Walzballenlänge eingeschnittenten Kalibern, in denen das Vorprofil auf diejenigen Abmaße heruntergewalzt wird, die der anschließenden Vor- und Fertigstraße nach optimalen Gesichtspunkten zugeleitet werden. Diese Breakdown-Gerüste, insbesondere deren Walzen, sind aber sehr teuer und aufwendig, so daß es anzustreben ist, diese schweren Gerüste durch Alternativen zu ersetzen, mit denen einerseits eine der Flexibilität der Walzstraße angemessene Vorwalzung erfolgen kann, und andererseits eine große Anzahl von Fertigquerschnitten erzeugbar ist. These problems do not occur with conventional rolling mills. she are known to operate with so-called breakdown scaffolds, the are heavy duo mill stands with the length of the rolled bale incised calibers, in which the preliminary profile to those dimensions is rolled down after the subsequent roughing and finishing mill optimal points of view. These breakdown scaffolds, especially their rollers, but are very expensive and complex, so that it the aim is to replace these heavy scaffolds with alternatives, with which on the one hand the flexibility of the rolling mill is appropriate Pre-rolling can be done, and on the other hand a large number of Finished cross sections can be generated.

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren zum Walzen von Trägern aus Vorprofilen vorzuschlagen, das unter Verzicht auf die schweren Breakdown-Gerüste ein wirtschaftliches Herstellen von Trägern ermöglicht, ohne die Flexibilität und Abmessungsvielfalt der zu walzenden Träger einzuschränken. Eine entsprechende Anpassung der Walzgerüste ist ein weiteres Ziel der Erfindung.The object of the present invention is to provide a method for rolling Propose beams from pre-profiles, the waiver of the heavy breakdown scaffolding an economical manufacture of beams enables without the flexibility and variety of dimensions of the restrict rolling beams. A corresponding adjustment of the Roll stands are another object of the invention.

Zur Lösung der Aufgabe wird erfindungsgemäß vorgeschlagen, daß für mindestens einen Breakdown-Stich das als Vertikalgerüst ausgebildete Vorgerüst, das erste Universalgerüst und das Flanschenstauchgerüst als Breakdown-Gruppe eingesetzt werden, das im Anschluß an den bzw. die Breakdown-Stiche ein oder mehrere Vorstiche auf dem ersten Universalgerüst und dem Flanschenstauchgerüst durchgeführt werden, bevor mindestens ein Fertigstich auf dem auslaufseitigen Universalgerüst ausgeführt wird.To solve the problem, the invention proposes that for at least one breakdown stitch that is designed as a vertical scaffold Roughing stand, the first universal stand and the flange compression stand as Breakdown group are used, the following the Breakdown stitches one or more pre-stitches on the first Universal scaffold and the flange compression scaffold are performed before at least one finish stitch on the universal scaffold on the outlet side is performed.

Unter Verwendung einer bekannten Walzstraße mit Vorgerüst und anschließender Kompaktgruppe aus zwei Universal- und einem Stauchgerüst ermöglicht das vorgeschlagene Verfahren die Durchführung von Breakdown-Stichen ohne die Verwendung des schweren und aufwendigen Breakdown-Gerüstes dadurch, daß für die Breakdown-Walzung mehrere Gerüste der bekannten Walzstraße in erfindungsgemäßer Reihenfolge eingesetzt werden. Das hat den Vorteil gegenüber der bekannten Lösung, daß durch die Einbeziehung des ersten Universalwalzgerüstes der Kompaktwalzgruppe in Verbindung mit dem zugeordneten Flanschenstauchgerüst beim Walzen des Vorprofiles auf dem Vorgerüst der Träger stets auch am Steg und Flansch reduziert wird, d. h. der das Vorgerüst verlassende Träger (Vorprofil), der über die Flansche gestaucht und dadurch am Steg verdickt wurde, wird im ersten Universalgerüst auf das richtige Stegmaß reduziert. Dabei kann die Aufstauchung aus dem Vorgerüst aufgehoben, aber auch eine zusätzliche Reduktion des Steges vorgenommen werden. In jedem Fall wird sichergestellt, daß das anschließende Flanschenstauchgerüst von Anfang an zum Flanschenstauchen eingesetzt werden kann, weil die im ersten Universalwalzgerüst vorgenommene Stegabnahme ein Leerlaufen der Stauchwalzen des Flanschenstauchgerüstes im Stegbereich ermöglicht. Insgesamt wird auf den drei hintereinander angeordneten Gerüsten eine optimale Breakdown-Walzung vorgenommen, die durch die Anstellbarkeit der Gerüste eine große Flexibilität sowohl beim Einsatz der Vorprofile, als auch bei der Vielfalt der walzbaren Fertigprofile ermöglicht. Die vorliegende Erfindung verwendet in Abkehr von der Lehre des Standes der Technik das Vorgerüst stets im Zusammenhang und gleichzeitig mit dem ersten Universalgerüst und dem Flanschenstauchgerüst der Kompaktwalzgruppe, wodurch erst die durch die Erfindung angestrebten Ergebnisse erreicht werden.Using a known mill train with roughing stand and subsequent compact group consisting of two universal and one compression frame allows the proposed method to perform Breakdown stitches without the use of heavy and elaborate Breakdown stand in that several for the breakdown rolling Frameworks of the known rolling mill in the order according to the invention be used. This has the advantage over the known solution, that through the inclusion of the first universal roll stand Compact rolling group in connection with the assigned Flange compression stand when rolling the preliminary profile on the roughing stand of Beam is always reduced on the web and flange, d. H. the the Pre-scaffold leaving beam (pre-profile) that over the flanges compressed and thereby thickened on the web, is in the first Universal scaffold reduced to the correct bar dimension. The Lifting up from the roughing stand, but also an additional one Reduction of the web can be made. In any case ensures that the subsequent flange compression frame from the beginning can be used for flanging, because the first Universal roll stand made an empty run of the Upset rolling of the flange upset in the web area enables. In total, one is placed on the three scaffolds arranged one behind the other optimal breakdown rolling made by the adjustability the scaffolding great flexibility when using the pre-profiles, as well as the variety of rollable finished profiles. The present invention used in departure from the teaching of the prior art Technology always in context and simultaneously with the first universal scaffold and the flange compression scaffold of Compact rolling group, whereby only those aimed at by the invention Results are achieved.

Das Vorwalzen nach der Universal-Breakdown-Walzung erfolgt ausschließlich auf dem ersten Universal- und dem Flanschenstauchgerüst der Kompaktwalzgruppe, d. h. ohne Verwendung des Vor- und des Universalfertiggerüstes in einem oder mehreren Stichen; das Fertiggerüst wird ausschließlich zur Fertigwalzung eingesetzt.The roughing is done after the universal breakdown rolling exclusively on the first universal and flange compression stand the compact rolling group, d. H. without using the pre and Universal finishing stand in one or more stitches; the finishing stand is used exclusively for finish rolling.

Eine Variante der Erfindung, die zusätzlich eine höhere Flexibilität der Straße ermöglicht und die Produktion erheblich zu erhöht, ist dadurch gekennzeichnet, daß das Vorgerüst als reversierbare Universal-Breakdown-Gerüstgruppe, bestehend aus einem Universalgerüst mit unmittelbar anschließendem Vertikal-Stauchgerüst ausgebildet ist und zur Ausführung mehrerer Breakdown-Stiche eingesetzt wird, an die sich mehrere Vorstiche unter Verwendung des ersten Universatwatzgerüstes und des Flanschenstauchgerüstes sowie mindestens ein Fertigstich auf dem auslaufseitigen Universalgerüst anschließen.A variant of the invention, which is also more flexible This enables the road and significantly increases production characterized in that the roughing stand as reversible Universal breakdown scaffolding group, consisting of a universal scaffolding is formed with an immediately subsequent vertical compression frame and used to perform multiple breakdown stitches several preliminary stitches using the first universal scaffolding and of the flange upsetting stand and at least one finish stitch on the Connect the universal scaffold on the outlet side.

Bei dieser vorgeschlagenen Lösung wird, wie bei konventionellen Straßen mit Breakdown-Gerüsten, die Breakdown-Walzung von der eingentlichen Vor- und Fertigwalzung getrennt. Tratzdem wird auf den Einsatz des schweren Breakdown-Gerüstes verzichtet; statt dessen wird eine Universal-Breakdown-Gerüustgruppe eingesetzt, die aus einem Universalgerüst und anschließendem Stauchgerüst besteht. Auf dieser Gerustanordnung werden mehrere Breakdown-Stiche gewalzt, bevor das so reduzierte Walzgut in dem gewünschten Fertigprofil entsprechenden Abmessungen dem ersten Universalwalzgerüst und dem wird.This proposed solution is like conventional roads with breakdown stands, the breakdown rolling from the ordinary Pre and finish rolling separately. Nevertheless, the use of the no heavy breakdown scaffolding; instead one becomes Universal breakdown scaffolding group used, consisting of one There is a universal scaffold and subsequent upsetting scaffold. On this Several breakdown stitches are rolled before this happens reduced rolling stock in the desired finished profile Dimensions of the first universal roll stand and the becomes.

Da zwischen den Breakdown-Stichen auf der Universal-Breakdown-Gerüustgruppe und den anschließenden Vorstichen das Walzgut frei ausläuft, ist eine getrennte Breakdown- und Vor- bzw. Fertigwalzung möglich, so daß die Verfügbarkeit der Straße erhöht wird. Because between the breakdown stitches on the Universal breakdown scaffolding group and the subsequent preliminary stitches Rolled material runs out freely, is a separate breakdown and preliminary or Finishing rolling possible, so that the availability of the road is increased.

Ein aus der EP-A 0265 757 bekanntes Walzwerk zum Walzen von Trägern aus Vorprofilen, insbesondere Stranggußprofilen mit einem Vorgerüst und einer dahinter angeordneten Kompaktgruppe aus zwei Universal-Gerüsten mit dazwischen angeordnetem Flanschen-Stauch-Gerüst, bei dem das auslaufseitige Universal-Gerüst als Fertiggerüst ausgebildet ist, wird erfindungsgemäß dadurch weitergebildet, daß das Vorgerüst als reversierbare Universal-Breakdown-Gerüstgruppe, bestehend aus einem Universal-Gerüst mit unmittelbar anschließendem Stauchgerüst ausgebildet ist und als Universal-Gerüst der Universal-Breakdown-Gerüstgruppe ein Kombi-Gerüst mit wahlweise Universal-Walzensatz und Duo-Walzensatz einsetzbar ist. Durch diese Gerüstausbildung wird die Einsetzbarkeit der Walzstraße wesentlich erhöht; durch den Ersatz des Universal-Walzensatzes durch einen Duo-Walzensatz mit eingeschnittenen Kalibern, kann die Universal-Breakdown-Gerüstgruppe auch als Vorgerüst einer Profilstraße eingesetzt werden, wenn dies gewünscht ist. A rolling mill known from EP-A 0265 757 for rolling beams Pre-profiles, in particular continuous casting profiles with a roughing stand and one behind it arranged compact group consisting of two universal scaffolds with in between arranged flange-compression frame, in which the outlet-side universal frame is designed as a finishing stand, is further developed according to the invention in that the Roughing stand as a reversible universal breakdown scaffolding group, consisting of one Universal scaffold with immediately following compression frame and is designed as Universal scaffolding of the universal breakdown scaffolding group with a combination scaffold optional universal roller set and duo roller set can be used. Through this The use of the rolling mill is considerably increased by scaffolding; through the Replacement of the universal roller set with a duo roller set with incised ones Calibres, the universal breakdown scaffolding group can also be used as a roughing stand Profilstrasse can be used if desired.

Im Zusammenhang damit ist es möglich, das Universalgerüst mit im Abstand verstellbaren Ständern auszurüsten, die den Einsatz unterschiedlich langer Duo-Walzensätze ermöglichen.In connection with this, it is possible to have the universal scaffold at a distance adjustable stands that can be used differently enable long duo roller sets.

Nach einem besonderen Merkmal der Erfindung ist vorgesehen, daß die Horizontalwalzen des Universalwalzensatzes, und die Vertikalwalzen des Stauchgerüstes der Universal-Breakdown-Gerüstgruppe bei aufrecht stehend gawalztem Träger glatte Walzballen aufweisen. Diese ansich untypische Ausbildung des Universal-Walzgerüstes verbilligt dieses, weil der aufwendige Profilschliff der Horizontalwalzen entfällt. Die glatten Walzen stauchen die Flansche der aufrecht stehenden Träger, während die Flanschkanten mit den vertikal angeordneten Stauchwalzen des Stauchgerüstes bearbeitet werden, die ebenfalls glatte Walzballen aufweisen. Die Vertikalwalzen im Universalgerüst reduzieren den Steg und halten gleichzeitig das Kammermaß.According to a special feature of the invention it is provided that the Horizontal rolls of the universal roll set, and the vertical rolls of the Compression frame of the universal breakdown scaffolding group at upright have rolled rolls standing upright rolled bales. This itself atypical training of the universal roll stand makes this cheaper, because the elaborate profile grinding of the horizontal rollers is not necessary. The smooth ones Rolls upset the flanges of the upright beams while the Flange edges with the vertically arranged upsetting rollers of the Edging stand are processed, which are also smooth rolled bales exhibit. The vertical rollers in the universal stand reduce the web and keep the chamber size at the same time.

Es ist aber auch denkbar, in dem Kombi-Gerüst Horizontalwalzen mit solchen Kalibern einzusetzen, die ein Auseinanderziehen der Träger im Sinne einer Vergrößerung der Stegflöhe ermöglichen.However, it is also conceivable to use horizontal rollers in the combination stand to use such calibres that pull apart the carrier in Allowing for an increase in the web height.

Insgesamt wird durch die Universal-Breakdown-Gerüstgruppe eine Walzstraße mit hoher Flexibilität bei geringerem Investitionsvolumen geschaffen, weil die Universal-Breakdown-Gerüstgruppe kostengünstiger zu erstellen ist, als ein schweres Breakdown-Gerüst mit den extrem teuren Kaliberwalzen. Gegenüber letzterem ergibt sich darüber hinaus der bedeutsame Vorteil der großen Flexibilität und Variabilität, sowohl beim Trägerwalzen, wie auch dann, wenn der Walzwerksbetreiber beabsichtigt, Profile auf seiner Walzstraße herzustellen. Overall, the universal breakdown scaffolding group makes one Rolling mill with high flexibility and lower investment volume created because the universal breakdown scaffolding group is cheaper is to create as a heavy breakdown framework with the extreme expensive caliber rolls. Compared to the latter, there is also the significant advantage of great flexibility and variability, both when Carrier rolls, even if the mill operator intends to To produce profiles on his rolling mill.

Ausführungsbeispiele der Erfindung werden nachfolgend beschrieben. Es zeigt:

Fig. 1
die schematische Anordnung einer Walzstraße zur Durchführung der Erfindung mit beispielhaften Stichfolgen,
Fig. 2
die schematische Darstellung der für die Breakdown-Walzung eingesetzen Gerüste,
Fig. 3
eine Walzstraße mit Universal-Breakdown-Gerüstgruppe und
Fig. 4
die schematische Darstellung der Walzung in der Universal-Breakdown-Gerüstgruppe.
Embodiments of the invention are described below. It shows:
Fig. 1
the schematic arrangement of a rolling mill for carrying out the invention with exemplary pass sequences,
Fig. 2
the schematic representation of the stands used for the breakdown rolling,
Fig. 3
a rolling mill with a universal breakdown stand group and
Fig. 4
the schematic representation of the rolling in the universal breakdown stand group.

In Figur 1 ist mit VE das mit Vertikalwalzen versehene Vorgerüst einer erfindungsgemäßen Walzstraße zum Walzen von Trägern bezeichnet. Unmittelbar benachbart zum Vorgerüst VE ist die Kompaktwalzgruppe, bestehend aus dem ersten Universalgerüst U1, dem mit HE bezeichneten Flanschenstauchgerüst mit horizontalen Stauchwalzen und dem Universalfertiggerüst UF. Nach dem erfindungsgemäßen Verfahren werden beispielsweise zwei Breakdown-Stiche im Vorgerüst VE, Universalwalzgerüst U1 und Flanschenstauchgerüst HE gefahren, wie in Figur 1 durch die Kreuze in üblicher Weise dargestellt ist. Das Universalfertiggerüst UF ist zum freien Durchlauf des Walzgutes geöffnet. Nach dem Reversierstich, bei dem in umgekehrter Reihenfolge das Flanschenstauchgerüst HE, das erste Universalgerüst U1 und das Vorgerüst VE benutzt werden, durchläuft das Walzgut im Reversierbetrieb drei Vorstiche im ersten Universalgerüst U1 und Flanschenstauchgerüst HE, bevor das Universalfertiggerüst UF - zum Fertigstich zugefahren - benutzt wird. In Figure 1 with VE, the roughing stand provided with vertical rollers is one Rolling mill according to the invention referred to rolling beams. The compact rolling group is directly adjacent to the roughing stand VE, consisting of the first universal scaffold U1, the one designated HE Flange compression stand with horizontal compression rollers and the Universal finishing stand UF. According to the inventive method for example two breakdown stitches in the VE roughing stand, Universal rolling stand U1 and flange compression stand HE driven, as in Figure 1 is represented by the crosses in the usual way. The Universal finishing stand UF is for free passage of the rolling stock open. After the reverse stitch, in the reverse order the HE flange flattening stand, the first U1 universal stand and the Roughing stand VE are used, the rolling stock passes through in reverse operation three preliminary stitches in the first universal scaffold U1 and flange compression scaffold HE before the universal finishing stand UF - moved to the final stitch - is used.

In Figur 2 ist grob schematisch angedeutet, wie die Breakdown-Stichfolge abläuft. In der oberen Darstellung ist anhand der gestrichelten Linien schematisch erkennbar, wie durch Einwirken der Vertikalwalzen auf das Vorprofil entsprechend der Pfeilrichtung; eine Verkleinerung des Kammermaßes 2 ebenso wie eine Verdickung des Steges 3 stattfindet. In der darunter abgebildeten Darstellung ist schematisch das erste Universalgerüst U1 dargestellt, das Vorprofil 1 unmittelbar darauf durchläuft. Hier wird durch die horizontale Universalwalze 4 der Steg 3 auf sein Ursprungsmaß oder darunter zurückreduziert, während gleichzeitig die Flansche weiter gestaucht werden. Durch die Reduktion des Steges wird erreicht, daß - wie in der dritten Darstellung darunter erkennbar - im Flanschenstauchgerüst HE die Stauchwalzen bei 5 auf den Flanschen 6 des Vorprofils einwirken, wobei der Steg einen ausreichenden Abstand X von der Stauchwalze aufweist.In Figure 2 is roughly schematically indicated how the Breakdown sequence expires. In the upper illustration is based on the Dashed lines can be seen schematically, as by the action of Vertical rolling on the preliminary profile according to the direction of the arrow; a Reduction of the chamber dimension 2 as well as a thickening of the web 3 takes place. The illustration below is schematic the first universal scaffold U1 shown, the preliminary profile 1 immediately goes through on it. Here is the horizontal universal roller 4 Web 3 reduced back to its original size or below while at the same time the flanges are further compressed. Through the reduction of the web is achieved that - as in the third representation below recognizable - in the flange upsetting stand HE the upsetting rollers at 5 on the Flanges 6 of the pre-profile act, the web having a sufficient Distance X from the upsetting roller.

In der erfindungsgemäßen Stichfolge wird bei allen Breakdown-Stichen das Vorprofil in jeder Hinsicht optimal gestaucht und dabei geführt, so daß bei großer Flexibilität eine Anpassung der Vorprofile an die weiteren Walzstiche ermöglicht wird, und eine gute Maßhaltigkeit der Fertigprofile zu erwarten ist, wie dies bisher nur unter Verwendung der Breakdown-Gerüste möglich war.The sequence according to the invention applies to all breakdown stitches the preliminary profile optimally compressed and guided in every respect, so that with great flexibility an adaptation of the previous profiles to the further rolling passes is made possible, and good dimensional accuracy of the Finished profiles can be expected, as was previously only possible using the Breakdown scaffolding was possible.

In Figur 3 ist eine andere Straßenanordnung dargestellt, bei der eine Universal-Breakdown-Gerüstgruppe UBD Verwendung findet. Diese besteht aus dem Universalgerüst U und dem Stauchgerüst E, an die sich die Kompaktwalzgruppe, bestehend aus dem ersten Universalgerüst U1, dem Flanschenstauchgerüst HE und dem Universalgerüst UF anschließt. Figur 3 zeigt in üblicher Darstellung die Stichfolge der Breakdown-Walzung, bei der das Vorprofil reversierend in drei Stichen durch das Universalgerüst U und das Stauchgerüst E der Universal-Breakdown-Gerüstgruppe geführt wird. Another road arrangement is shown in FIG Universal breakdown scaffolding group UBD is used. This exists from the universal scaffold U and the compression scaffold E, to which the Compact rolling group, consisting of the first universal stand U1, the Flange compression stand HE and the universal stand UF. Figure 3 shows the sequence of the breakdown rolling in the usual representation, in which the preliminary profile is reversed in three passes through the Universal scaffold U and the compression scaffold E der Universal breakdown scaffolding group is guided.

Die Vorwalzung des Trägers nach der Universal-Breakdown-Walzung erfolgt wie bei der Darstellung nach Figur 1 in dem ersten Universalgerüst U1 und dem Flanschenstauchgerüst HE im dreifachen Durchlauf bei geöffnetem Universalfertiggerüst UF, im Anschluß daran wird das Universalfertiggerüst zugefahren und der Fertigstich durchgeführt.The beam is pre-rolled after the universal breakdown rolling as in the illustration according to FIG. 1 in the first universal frame U1 and the flange upsetting stand HE in three passes with the Universal finishing stand UF, after that it will be The universal finishing stand is closed and the final stitch is carried out.

In Figur 4 ist erkennbar, daß die Walzung des Vorprofils stehend erfolgt und mittels glatter Horizontalwalzen 7 im Universalwalzgerüst U der Universal-Breakdown-Gerustgruppe durchgeführt wird. Die Vertikalwalzen sind mit 8 bezeichnet. Im daneben angeordneten Stauchgerüst E werden erkannbar ebenfalls glatte Vertikalwalzen 9 verwendet, die auf die Flanschkanten den Vorprofils 1 einwirken. Wie eingangs bereits beschrieben, vereinfacht die glatte Ausbildung der Horizontalwalzen des Universalwalzgerüstes U und der Vertikalwalzen des Stauchgerüstes E die Konstruktion des Walzgerüstes und verbilligt den Einsatz und die Instandhaltung, ohne die Funktionsweise und die erfindungsgemäßen Vorteile der Walzstraßenanordnung und des Walzverfahrens einzuschränken.In Figure 4 it can be seen that the rolling of the pre-profile takes place standing and by means of smooth horizontal rolls 7 in the universal roll stand U Universal breakdown scaffold group is performed. The vertical rollers are designated by 8. In the adjoining edging stand E recognizable also used smooth vertical rollers 9, which on the Apply flange edges to the preliminary profile 1. As already mentioned described, simplifies the smooth design of the horizontal rolls of Universal roll stand U and the vertical rolls of the edging stand E die Construction of the roll stand and cheaper the use and the Maintenance without the functionality and the invention Advantages of the rolling mill arrangement and the rolling process restrict.

Claims (6)

  1. A method for rolling girders from preliminary sections (1), especially continuously cast sections, comprising a roughing stand (VE) and a compact group arranged downstream thereof and consisting of two universal stands (U1, UF) with a flange edging stand (HE) arranged therebetween, wherein the delivery-side universal stand (UF) takes the form of a finishing stand,
    characterised in that,
    for at least one breakdown pass, the roughing stand (VE), which takes the form of a vertical stand, the first universal stand (U1) and the flange edging stand (HE) may be used as the breakdown group, and in that one or more roughing passes are carried out after the breakdown pass(es) on the first universal stand (U1) and the flange edging stand (HE), before at least one finishing pass is carried out on the delivery-side universal stand (UF).
  2. A method for rolling girders from preliminary sections (1), especially continuously cast sections, comprising a roughing stand (VE) and a compact group arranged downstream thereof and consisting of two universal stands (U1, UF) with a flange edging stand (HE) arranged therebetween, wherein the delivery-side universal stand (UF) takes the form of a finishing stand,
    characterised in that
    the roughing stand takes the form of a reversible universal breakdown group (UBD), comprising a universal stand (U) with edging stand (E) directly adjacent thereto, and is used to carry out several breakdown passes, followed by several roughing passes using the first universal roll stand (U) and the flange edging stand (HE) of the compact group and at least one finishing pass on the delivery-side universal stand (UF).
  3. A method according to claim 2,
    characterised in that
    between the breakdown passes on the universal breakdown stand group (UBD) and the subsequent roughing passes, the rolled article runs out freely.
  4. A rolling mill for rolling girders from preliminary sections (1), especially continuously cast sections, comprising a roughing stand (VE) and a compact group arranged downstream thereof and consisting of two universal stands (U1, UF) with a flange edging stand (HE) arranged therebetween, wherein the delivery-side universal stand (UF) takes the form of a finishing stand,
    characterised in that
    the roughing stand takes the form of a reversible universal breakdown group (UBD), comprising a universal stand (U) with edging stand (E) directly adjacent thereto, and in that the universal stand (U) of the universal breakdown stand group (UBD) is a combined stand having a universal roll set and a duo roll set which may be used selectively.
  5. A rolling mill according to claim 4,
    characterised in that
    the spacing of the uprights of the universal stand (U) of the universal breakdown stand group (UBD) is adjustable.
  6. A rolling mill according to claim 4,
    characterised in that
    the horizontal rolls (7) of the universal roll set (U) and the vertical rolls (9) of the flange edging stand (E) comprise smooth roll barrels in the event of the girders being rolled in the upright position.
EP95913855A 1994-04-29 1995-03-14 Process and device for rolling beams from preliminary sections Expired - Lifetime EP0757599B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4415762A DE4415762A1 (en) 1994-04-29 1994-04-29 Method and device for rolling beams from pre-profiles
DE4415762 1994-04-29
PCT/DE1995/000390 WO1995029774A1 (en) 1994-04-29 1995-03-14 Process and device for rolling beams from preliminary sections

Publications (2)

Publication Number Publication Date
EP0757599A1 EP0757599A1 (en) 1997-02-12
EP0757599B1 true EP0757599B1 (en) 1999-02-03

Family

ID=6517298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95913855A Expired - Lifetime EP0757599B1 (en) 1994-04-29 1995-03-14 Process and device for rolling beams from preliminary sections

Country Status (5)

Country Link
EP (1) EP0757599B1 (en)
AU (1) AU2108295A (en)
DE (2) DE4415762A1 (en)
TW (1) TW303312B (en)
WO (1) WO1995029774A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512931A1 (en) * 1995-03-30 1996-10-02 Mannesmann Ag Universal stand group and method for rolling continuously cast pre-profiles
DE19628369A1 (en) * 1996-07-13 1998-01-15 Schloemann Siemag Ag Process for rolling finished profiles from a preliminary profile
IT1397191B1 (en) * 2009-12-01 2013-01-04 Siemens Vai Metals Tech Srl UNIVERSAL REVERSIBLE TRAIN COMPACT FOR THE PRODUCTION OF LARGE MEDIUM PROFILES.
CN109719126B (en) * 2019-02-28 2021-01-08 武汉钢铁有限公司 Rolling process of F-shaped rail rolling pass system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4337555A1 (en) * 1993-11-04 1995-05-11 Schloemann Siemag Ag Method for rolling finished profiles from a preliminary profile by means of a roll stand arrangement working in reversing operation
DE3636478C2 (en) * 1986-10-27 1996-10-31 Schloemann Siemag Ag Process for rolling finished profiles from a preliminary profile
EP0535767B1 (en) * 1991-10-02 1996-02-07 MANNESMANN Aktiengesellschaft Rolling train for rolling section beams

Also Published As

Publication number Publication date
DE59505037D1 (en) 1999-03-18
DE4415762A1 (en) 1995-11-02
WO1995029774A1 (en) 1995-11-09
TW303312B (en) 1997-04-21
EP0757599A1 (en) 1997-02-12
AU2108295A (en) 1995-11-29

Similar Documents

Publication Publication Date Title
EP0256409B2 (en) Method of producing sections
DE3636478C2 (en) Process for rolling finished profiles from a preliminary profile
EP0846503B1 (en) Method for rolling finished sections from section blanks, by means of reversibly driven arrangements of roll stands
EP0818250A2 (en) Method for rolling finished sections from preliminary sections
DE1960601C3 (en) Universal rolling mill for rolling rails
EP0653253B1 (en) Method for rolling finished sections from section blanks by means of a reversibly driven arrangement of roll stands
EP0757599B1 (en) Process and device for rolling beams from preliminary sections
EP0734792B1 (en) Group of universal rolling stands and method for the rolling of continuously cast preliminary sections
DE1427875A1 (en) Rolling mill for rolling and method for producing profiles, such as double T-beams or the like. with thin wall thickness
EP0535767B1 (en) Rolling train for rolling section beams
EP0890395B1 (en) Method for rolling sheet pile profiles starting from a near net shape casted preliminary section
EP0870554B1 (en) Rolling train for rolling flat steel
EP0913210B1 (en) Rolling installation for the rolling of all types of finished profiles
DE2844438A1 (en) ROLLING MILL FOR ROLLING HEAVY CARRIER PROFILES OR RAILS
EP0065533B1 (en) Method for rolling a u-shaped steel bar or similar and beam-making universal mill train for implementing such method
EP0811434B1 (en) Method for operating a rolling mill installation
DE4210771C2 (en) Method and device for producing a profile
DE19650279A1 (en) Method for rolling finished sections from preliminary sections
DE19743633A1 (en) Method for rolling finished sections from preliminary sections
DE10207176A1 (en) Rolling line for rolling wire and fine iron
DE3832392A1 (en) Sectional-steel rolling mill
DE8619684U1 (en) Tandem mill for rolling U-steel
DE1269980B (en) Continuous rolling mill for rolling out fine steel or wire
DE19958862A1 (en) Device for influencing the web position when rolling shaped steel flange profiles
DE19730598A1 (en) Method for rolling finished sections from preliminary sections

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19961022

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB IT LU

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19980629

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB IT LU

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19990203

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990314

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19990315

Year of fee payment: 5

REF Corresponds to:

Ref document number: 59505037

Country of ref document: DE

Date of ref document: 19990318

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990419

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000314

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20000314

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010103