EP1641575B1 - Method for leveling hot profiles - Google Patents

Method for leveling hot profiles Download PDF

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Publication number
EP1641575B1
EP1641575B1 EP04740428A EP04740428A EP1641575B1 EP 1641575 B1 EP1641575 B1 EP 1641575B1 EP 04740428 A EP04740428 A EP 04740428A EP 04740428 A EP04740428 A EP 04740428A EP 1641575 B1 EP1641575 B1 EP 1641575B1
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EP
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Prior art keywords
profile
flange
straightening
profiles
web
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EP04740428A
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German (de)
French (fr)
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EP1641575A1 (en
Inventor
Axel Maag
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BFI VDEH Institut fuer Angewandte Forschung GmbH
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BFI VDEH Institut fuer Angewandte Forschung GmbH
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B21D3/05Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes rectangular to the path of the work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/16Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/08Metal-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
    • B21B1/088H- or I-sections
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/04Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
    • C21D9/06Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails with diminished tendency to become wavy

Definitions

  • the straightening method according to the invention builds on the basic idea to direct the profiles at profile temperatures of> 70 ° C in such a way that the straightening force is introduced directly into the flange of the profile. As a result, residual stresses in the profile are avoided, which otherwise produce deformations of the profile during cooling.
  • profiles are directed with a web and at least one flange.
  • profiles are in particular T-beam, double T-beam, U-profiles and L-shaped profile legs, wherein the Flange in all profile types is preferably at an angle of 90 ° to the web, although other orientations are readily possible.
  • the profiles are directed at profile temperatures of over 70 ° C, more preferably at temperatures above 100 ° C.
  • the method according to the invention also makes it possible to straighten at higher temperatures, for example also at about 200 ° C. and more.
  • the term profile temperature may include, for example, the stem root surface temperature as well as the temperature in the stem root.
  • it can also comprise the surface temperature of the web as well as the carrier edges or the temperature in these profile elements.
  • the profile temperature can also be determined by including the temperature of several of these profile elements.
  • the profile temperature can be determined by measuring the temperature profile in the entire profile or by measuring the temperature in some of the profile elements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Forging (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

The invention relates to a method for leveling profiles ( 5 ). When the hot-rolled profiles are cooled off, they deform considerably. Therefore, the profiles are not leveled while they are hot but are first cooled off. The inventive method for the first time allows leveling hot profiles at a profile temperature of >70° C. while maintaining their once leveled profile shape when cooled off. For this purpose, the leveling force during leveling is applied directly to the flange ( 5 b, 5 c). As a consequence, the original state of stresses in the web ( 5 a) and in the web roots remains unchanged and disadvantageous internal stresses are avoided.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Richten eines Profils das einen Steg und mindestens einen Flansch aufweist gemäß dem Oberbegriff des Anspruchs 1 (siehe z.B. EP-A-0753360) insbesondere zum Richten von Doppel-T- oder U-Trägern, mit Hilfe von Richtwerkzeugen.The invention relates to a method for straightening a profile having a web and at least one flange according to the preamble of claim 1 (see eg EP-A-0753360) in particular for straightening double-T or U-beams, with the aid of straightening tools.

Profilstahl erfährt nach dem Warmwalzen beim Abkühlvorgang häufig Verformungen bzw. Verwerfungen. Um hierdurch hervorgerufene Abweichungen von der gewünschten Profilform zu beseitigen und dem Träger die gewünschte Geradheit zu verleihen, werden die Profile nach dem Warmwalzen und Abkühlen gerichtet. Da die Verformungen bei der Abkühlung auftreten, ist es bislang nicht zufriedenstellend möglich, die Profile noch im warmen Zustand zu richten. Zwar können während des Richtvorganges der warmen Profile normgerechte Ergebnisse erzielt werden, nach dem endgültigen Abkühlen federn die Profile jedoch teilweise zurück in eine gekrümmte, nicht normgerechte Form.Section steel often experiences deformations or warping after hot rolling during the cooling process. In order to eliminate deviations from the desired profile shape caused thereby and to give the wearer the desired straightness, the profiles are directed after hot rolling and cooling. Since the deformations occur during cooling, so far it has not been satisfactorily possible to straighten the profiles while still warm. Although standardized results can be achieved during the straightening process of the warm profiles, after the final cooling, the profiles partly spring back into a curved, non-standard shape.

Im Stand der Technik wird daher gefordert, daß das Profil auf niedrige Temperaturen abgekühlt wird (siehe beispielsweise DE 24 56 782 und US 5,060,498). Die Profile werden hierzu in Kühlbetten oder Kühlgruben abgekühlt. Dies führt in nachteiliger Weise zu zeitlichen Verzögerungen, die teilweise zu einem zeitweiligen Produktionsstillstand führen.The prior art therefore calls for the profile to be cooled to low temperatures (see, for example, DE 24 56 782 and US Pat. No. 5,060,498). The profiles are cooled for this purpose in cooling beds or cooling pits. This leads disadvantageously to time delays, which sometimes lead to a temporary production downtime.

Sofern im Stand der Technik Profile bei höheren Temperaturen gerichtet werden, wird das Profil differenziell abgekühlt oder erwärmt, um im Steg Druckspannungen zu erzeugen (siehe DE 35 01 522 C1; DE 36 38 816 C1). Nach dem Richten gleicht sich die Temperatur des Steges an die der Flansche an, wobei die Längszugspannungen abgebaut werden sollen. Diese Verfahren sind jedoch durch die dort vorgesehene Erzeugung von genau einzustellenden Temperaturgradienten in den Profilen zeit- und energieaufwendig. Des weiteren können Verformungen des Profils durch Schrumpfung des Steges beim endgültigen Abkühlen auftreten, die wiederum dazu führen, daß die auf Raumtemperatur abgekühlten Schienen nicht den Normanforderungen entsprechen. Daher sind auch diese Verfahren nicht zufriedenstellend.If profiles are directed at higher temperatures in the prior art, the profile is differentially cooled or heated in order to generate compressive stresses in the web (see DE 35 01 522 C1, DE 36 38 816 C1). After straightening, the temperature of the web is equalized to that of the flanges, with the longitudinal tensile stresses to be reduced. However, these methods are time-consuming and energy-consuming due to the provision of precisely planned temperature gradients in the profiles provided there. Furthermore, deformation of the profile can occur due to shrinkage of the web during the final cooling, which in turn lead to the rails cooled to room temperature not meeting the standard requirements. Therefore, these methods are not satisfactory.

Der Erfindung liegt die Aufgabe zugrunde, ein verbessertes Verfahren zur Verfügung zu stellen, welches es ermöglicht, Profile im warmen Zustand zu richten.The invention has for its object to provide an improved method available, which makes it possible to judge profiles in the warm state.

Gelöst wird diese Aufgabe durch den Gegenstand der Hauptansprüche. Vorteilhafte Ausführungsformen sind in den Unteransprüchen wiedergegeben.This object is achieved by the subject of the main claims. Advantageous embodiments are given in the subclaims.

Das erfindungsgemäße Richtverfahren baut auf dem Grundgedanken auf, die Profile bei Profiltemperaturen von >70°C zu richten und zwar derart, daß die Richtkraft unmittelbar in den Flansch des Profils eingeleitet wird. Dadurch werden Eigenspannungen im Profil vermieden, die andernfalls beim Abkühlen Verformungen des Profils erzeugen.The straightening method according to the invention builds on the basic idea to direct the profiles at profile temperatures of> 70 ° C in such a way that the straightening force is introduced directly into the flange of the profile. As a result, residual stresses in the profile are avoided, which otherwise produce deformations of the profile during cooling.

Dabei wird die Richtkraft bevorzugt in die Schmalseite des Flansches eingeleitet, also bei einem Profil mit vertikal ausgerichteten Flansch von oben oder unten. Erfindungsgemäß muß eine Richtkraft jedoch nicht nur in einer Richtung und an einer Stelle eingeleitet werden. Im Rahmen der Erfindung können Richtkräfte, beispielsweise über kammartige Walzen, sowohl in die seitliche "Hauptfläche" des Flansches als auch die Schmalseite des Flansches eingeleitet werden, genauso wie sie nur in die seitliche "Hauptfläche" eingeleitet werden können.The straightening force is preferably introduced into the narrow side of the flange, so in a profile with vertically aligned flange from above or below. According to the invention, however, a straightening force need not be introduced in one direction and at one point. In the context of the invention straightening forces, for example via comb-like rollers, both in the lateral "main surface" of the flange and the narrow side of the flange can be introduced, just as they can be introduced only in the lateral "main surface".

Der Erfindung liegt die Erkenntnis zugrunde, dass die im Stand der Technik beobachtete Formveränderung von warmgerichteten Profilen nach dem Abkühlen in dem differentiellen Wärmemengen-Inhalt des noch warmen Profils liegt. Im Übergangsbereich von Steg zu Flansch (Stegwurzel) befindet sich eine hohe Massenkonzentration mit geringer Oberfläche, die im Vergleich zu den angrenzenden Massen langsamer abkühlt. Folglich weist sie eine höhere Temperatur als der Rest des Profils auf. Umformende Einwirkungen in den weiteren Abkühlvorgang verändern die Temperatur und können temperaturabhängige Spannungsverteilungen erzeugen. Beim konventionellen Richten, bei welchem die Richtscheiben den Steg im Bereich der Stegwurzeln erfassen, zwingen die Richtscheiben dem Steg die durch die Richtscheibenanstellung vorgegebenen Wechselbiegungen auf, dessen Hin- und Herbewegungen auf den Flansch übertragen werden und schließlich mit den reduzierten Anstellungsvorgaben in Durchlaufrichtung das erwünschte gerade Profil erzeugen.The invention is based on the finding that the change in shape of hot-formed profiles observed in the prior art after cooling lies in the differential heat quantity content of the still-warm profile after cooling. In the transition region from web to flange (web root) there is a high mass concentration with a low surface area, which cools more slowly compared to the adjacent masses. As a result, it has a higher temperature than the rest of the profile. Forming influences in the further cooling process change the temperature and can generate temperature-dependent voltage distributions. In conventional straightening, in which the straightening disks detect the web in the area of the web roots, the straightening disks force the web to change bends given by the straightening disk adjustment, whose reciprocating movements are transmitted to the flange and finally with the reduced employment requirements in the direction of travel the desired straight Create profile.

Beim Warmrichten bedingt die höhere Temperatur des Stegwurzelbereichs eine spezifische Fließspannung des Werkstoffs, die durch eine angepaßte Anstellung für den Warmrichtvorgang (mit der konventionellen Richttechnik) berücksichtigt wird. Das konventionelle Richten erzeugt in den Profilen Eigenspannungsverteilungen, die sich von denen des Ausgangszustandes unterscheiden. Besonders im Stegwurzelbereich treten Eigenspannungsspitzen auf mit Werten, die im Bereich der Fließspannung und darüber liegen können.When hot-straightening, the higher temperature of the root area causes a specific yield stress of the material, which is taken into account by an adapted employment for the heat-straightening process (with the conventional straightening technique). Conventional straightening generates residual stress distributions in the profiles which differ from those of the initial state. Especially in the Stegwurzelbereich occur residual stress peaks with values that can be in the range of yield stress and above.

Sofern mit den konventionellen Richtverfahren Profile im warmen Zustand gerichtet werden, werden immer im gewissen Maße Eigenspannungen erzeugt. Die nachfolgende Abkühlung ändert die Spannungsverteilung und die Spannungswerte, was die im Stand der Technik bekannten und beobachteten Verwerfungen des gerichteten Profils zur Folge hat.If profiles are directed with the conventional straightening method in the warm state, residual stresses are always generated to a certain extent. Subsequent cooling alters the stress distribution and the stress values, resulting in the distortions of the directional profile known and observed in the prior art.

Um gerade Profile bei höheren Temperaturen zu erzeugen und dieses gerade Profil auch noch nach dem Abkühlen zu erhalten, werden gemäß der Lehre der Erfindung beim Richten in dem Übergangsbereich zwischen Steg und Flansch und im Steg selber durch die Einleitung der Richtkraft in den Flansch keine Eigenspannungen erzeugt, die die nachteilige Beeinflussung der Produkteigenschaften und der Geradheit der Profile zur Folge haben. Durch die Krafteinleitung in den Flansch wird vielmehr der unproblematische Spannungszustand im Steg und in den Stegwurzeln beibehalten, und der Eigenspannungszustand im Flansch wird nur unwesentlich verändert. Deshalb ist eine nachteilige, abkühlungsbedingte Änderung des Spannungszustandes im erkalteten Profil nicht zu erwarten.In order to produce straight profiles at higher temperatures and to maintain this straight profile even after cooling, according to the teaching of the invention when straightening in the transition region between the web and flange and the web itself generated by the introduction of the straightening force in the flange no residual stresses that result in adverse effects on the product properties and the straightness of the profiles. The introduction of force into the flange rather the unproblematic state of stress in the web and in the web roots is maintained, and the residual stress state in the flange is only insignificantly changed. Therefore, a disadvantageous, cooling-related change in the state of stress in the cooled profile is not expected.

Durch das erfindungsgemäße Verfahren ist es in vorteilhafter Weise möglich, die Profile noch im warmen Zustand im Anschluß an das Warmwalzverfahren weiter zu bearbeiten. Dies führt zu einer erheblichen Zeitersparnis und vermeidet Produktionsstillstände. Des weiteren ist die Bearbeitung des noch warmen Stahls mit weniger Kraftaufwand möglich, so dass auch auf diese Weise Energie eingespart werden kann.By the method according to the invention, it is possible in an advantageous manner to further process the profiles still in the warm state following the hot rolling process. This leads to a considerable saving of time and avoids production stoppages. Furthermore, the processing of the still warm steel with less effort is possible, so that energy can be saved in this way.

Mit dem erfindungsgemäßen Verfahren werden Profile mit einem Steg und mindestens einem Flansch gerichtet. Derartige Profile sind insbesondere T-Träger, Doppel-T-Träger, U-Profile und L-förmige Profilschenkel, wobei der Flansch bei allen Profiltypen vorzugsweise im Winkel von 90° zum Steg steht, obwohl auch andere Ausrichtungen ohne weiteres möglich sind.With the method according to the invention profiles are directed with a web and at least one flange. Such profiles are in particular T-beam, double T-beam, U-profiles and L-shaped profile legs, wherein the Flange in all profile types is preferably at an angle of 90 ° to the web, although other orientations are readily possible.

Die Profile werden bei Profiltemperaturen von über 70°C gerichtet, besonders bevorzugt bei Temperaturen von über 100°C. Das erfindungsgemäße Verfahren ermöglicht jedoch auch das Richten bei höheren Temperaturen, so beispielsweise auch bei ca. 200°C und mehr. Es gibt unterschiedliche Möglichkeiten zur Ermittlung und Festlegung der Profiltemperatur. Dieser Begriff ist daher weit zu verstehen. Der Begriff Profiltemperatur kann beispielsweise die Stegwurzel-Oberflächentemperatur sowie die Temperatur in der Stegwurzel beinhalten. Ferner kann er auch die Oberflächentemperatur des Steges sowie der Trägerkanten bzw. die Temperatur in diesen Profilelementen umfassen. Ferner kann die Profiltemperatur auch durch Einbeziehung der Temperatur mehrerer dieser Profilelemente festgelegt werden. So kann die Profiltemperatur beispielsweise durch Messung des Temperaturverlaufs im gesamten Profil oder durch Messung der Temperatur in einigen der Profilelemente festgelegt werden. Ein häufig eingesetztes Verfahren zur Festlegung der Profiltemperatur ist beispielsweise das Temperatur-Scanning. Dabei wird mittels eines beweglich angeordneten Temperaturmessgerät über die Trägerkante, die Stegwurzel, den Steg und wieder die andere Stegwurzel und andere Trägerkante die Temperatur erfaßt. Aus dem gemessenen Temperaturverlauf wird die Profiltemperatur bestimmt, wobei die Temperaturen in den Stegwurzeln stärker gewichtet werden können. Als Profiltemperatur kann deshalb erfindungsgemäß auch das Ergebnis eines solchen Temperatur-Scannings verstanden werden.The profiles are directed at profile temperatures of over 70 ° C, more preferably at temperatures above 100 ° C. However, the method according to the invention also makes it possible to straighten at higher temperatures, for example also at about 200 ° C. and more. There are different ways to determine and determine the profile temperature. This term is therefore to be understood broadly. The term profile temperature may include, for example, the stem root surface temperature as well as the temperature in the stem root. Furthermore, it can also comprise the surface temperature of the web as well as the carrier edges or the temperature in these profile elements. Furthermore, the profile temperature can also be determined by including the temperature of several of these profile elements. For example, the profile temperature can be determined by measuring the temperature profile in the entire profile or by measuring the temperature in some of the profile elements. A frequently used method for determining the profile temperature is, for example, temperature scanning. In this case, the temperature is detected by means of a movably arranged temperature measuring device on the support edge, the web root, the web and again the other web root and other support edge. From the measured temperature profile, the profile temperature is determined, the temperatures in the land roots can be weighted more. As a profile temperature can therefore be understood according to the invention, the result of such a temperature scanning.

Gemäß einer vorteilhaften Weiterbildung des erfindungsgemäßen Verfahrens werden die Richtkräfte über eine Mantelfläche des Richtwerkzeugs in den Flansch eingeleitet, die winkelig in bezug auf die Obefläche des Flansches steht, auf die dieses Richtwerkzeug einwirkt. Eine solche Vorrichtung ist beispielsweise in der DE 195 25 513 A1 beschrieben.According to an advantageous embodiment of the method according to the invention, the straightening forces are introduced via a lateral surface of the straightening tool in the flange, which is angular with respect to the surface of the flange, acts on this straightening tool. Such a device is described for example in DE 195 25 513 A1.

Beispielsweise sind die Richtwerkzeuge, insbesondere Richtscheiben, zumindest teilweise kegelstumpfförmig ausgebildet und übertragen die Richtkraft mit ihrer konischen Mantelfläche auf den Flansch. Die Richtwerkzeuge können oberhalb und/oder unterhalb des Richtgutes angeordnet sein.For example, the straightening tools, in particular straightening discs, at least partially frusto-conical and transmit the straightening force with its conical lateral surface on the flange. The straightening tools can be arranged above and / or below the straightening material.

Der Neigungswinkel der wirksamen Mantelfläche liegt vorzugsweise in der Größenordnung des Reibungswinkels zwischen Mantelfläche und Oberfläche, auf die das Richtwerkzeug einwirkt; er ergibt sich dann aus der folgenden Gleichung: μ R - Scheibe / Profil = tan ρ

Figure imgb0001
und gewährt eine Minimierung der Flanschkantenaufstauchung. Bei richtig bemessenem Reibungswinkel der Mantelflügel werden im Flansch Querspannungen erzeugt, die den in der Kontaktfläche wirkenden Reibschubspannung entgegen wirken und so ein Flanschkantenaufstauchen verhindern. Der Neigungswinkel beträgt vorzugsweise 5°.The angle of inclination of the effective lateral surface is preferably of the order of magnitude of the angle of friction between the lateral surface and the surface against which the straightening tool acts; it then results from the following equation: μ R - disc / profile = tan ρ
Figure imgb0001
and ensures minimization of flange edge bulge. With properly measured friction angle of the casing wings transverse stresses are generated in the flange, which counteract the frictional shear stress acting in the contact surface and thus prevent Flanschkantenaufabtuchen. The angle of inclination is preferably 5 °.

Vorzugsweise liegt der Schnittpunkt der Mantellinien der antriebsfernen Richtscheibe antriebsfern und der Schnittpunkt der antriebsnahen Richtscheibe antriebsnah.Preferably, the intersection of the generatrices of the drive-distant straightening disc is remote from the drive and the intersection of the drive-near straightening disc drive close.

Um je nach Richtkraft Ausbiegungen des Flansches in der Horizontalen, bezogen auf die Richtposition, zu vermeiden, weisen die Richtscheiben vorzugsweise flanschstützende Flächen auf, die sich auf der Stegseite und/oder der stegabgewandten Seite des Flansches befinden. Demnach besitzen die als Richtscheiben ausgebildeten Richtwerkzeuge vorzugsweise einen U-förmigen oder T-förmigen axialen Querschnitt. Die flanschstützenden Flächen greifen jeweils abwechselnd außen und innen am Flansch an.In order to avoid deflections of the flange in the horizontal, based on the straightening position, depending on the straightening force, the straightening discs preferably have flange-supporting surfaces which are located on the web side and / or the web-facing side of the flange. Accordingly, trained as straightening straightening tools preferably a U-shaped or T-shaped axial cross-section. The flange-supporting surfaces each engage alternately outside and inside the flange.

Um mit einem Richtrollenpaar gleichzeitig Flansch oder Schenkelprofile unterschiedlicher Abmessung ohne Richtscheibenwechsel richten zu können, eigenen sich Richtscheiben mit einem kammerartigen axialen Querschnitt.To judge with a pair of straightening rollers at the same time flange or leg profiles of different dimensions without changing the straightening, have their own straightening discs with a chamber-like axial cross-section.

Eine derartige Richtscheibe besteht dann, vorzugsweise einstückig, aus einzelnen Scheiben zwischen denen sich die erfindungsgemäß gegenüber der Horizontalen geneigten wirksamen Mantelflächen befinden und deren seitlichen Flächen den Flansch oder Steg in der Richtposition ein- oder beidseitig abstützen.Such a straightening disk then consists, preferably in one piece, of individual disks between which the inventive lateral surfaces which are inclined relative to the horizontal are located and whose lateral surfaces support the flange or web in the straightening position on one or both sides.

Nicht alle Richtwerkzeuge müssen mit der wirksamen Mantelfläche versehen sein. So können nur einlaufseitig Richtwerkzeuge mit winkelig in bezug auf die Richtachse verlaufender wirksamer Mantelfläche angeordnet sein. Im Extremfall genügt jeweils ein entsprechend ausgestaltetes Richtwerkzeug bzw. Werkzeugpaar oberhalb und unterhalb des Richtgutes in gegenseitiger Nachbarschaft. Unterhalb des Richtgutes können auch nur im Auslaufbereich derartig ausgestaltete Richtwerkzeuge angeordnet sein.Not all straightening tools must be provided with the effective lateral surface. Thus, only the inlet side straightening tools can be arranged with angularly extending with respect to the directional axis effective lateral surface. In the extreme case, a correspondingly configured straightening tool or pair of tools above and below the straightening material in mutual proximity is sufficient in each case. Below the Richtgutes can also be arranged only in the outlet area configured straightening tools.

Die mit dem erfindungsgemäßen Verfahren eingesetzten Mantel- bzw. Schrägflächen erlauben ein Höchstmaß an Richtgenauigkeit beim Richten der warmen Profile. Sie vermeiden insbesondere das Entstehen von Flanschaufstauchungen und nach außen gerichteter Ausbauchungen im Bereich der Flanschkanten und bewahren den vom Warmwalzen der Profile herrührenden günstigen Eigenspannungszustand des ungerichteten Profils.The mantle or inclined surfaces used with the method according to the invention allow a maximum of directional accuracy when straightening the warm profiles. In particular, they avoid the emergence of flange bulges and outward bulges in the region of the flange edges and preserve the favorable residual stress state of the non-directional profile resulting from the hot rolling of the profiles.

Die Erfindung wird nachfolgend anhand von Figuren näher erläutert. Die Zeichnungen zeigen in

Fig. 1
die schematische Darstellung einer mit dem erfindungsgemäßen Verfahren bevorzugt eingesetzten Richtvorrichtung mit einem oberen Richtscheibenpaar teilweise in einem axialen Längsschnitt,
Fig. 2
eine vergrößerte Darstellung eines Teils der beiden Richtscheiben,
Fig. 3
eine Richtvorrichtung mit außenseitiger Flanschführung,
Fig. 4
die vergrößerte Darstellung eines Teils der beiden Richtscheiben,
Fig. 5
einen axialen Längsschnitt durch eine Richtrolle zum flanschgestützten Richten bei unterschiedlichen Trägerabmessungen,
Fig. 6
einen Teil der Richtrolle nach Fig. 5,
Fig. 7
eine Richtbuchse mit zylindrischem Mittelteil in einem axialen Längsschnitt,
Fig. 8
einen Teil der Richtbuchse nach Fig. 7 in vergrößerter Darstellung und
Fig. 9
eine zylindrische Richtbuchse.
The invention will be explained in more detail with reference to figures. The drawings show in
Fig. 1
the schematic representation of a preferably used with the inventive method straightening device with an upper straightening disk pair partially in an axial longitudinal section,
Fig. 2
an enlarged view of a part of the two straightening disks,
Fig. 3
a straightening device with outside flange guide,
Fig. 4
the enlarged view of a part of the two straightening discs,
Fig. 5
an axial longitudinal section through a straightening roller for flange-oriented straightening at different carrier dimensions,
Fig. 6
a part of the straightening roller according to Fig. 5,
Fig. 7
a straightening bushing with a cylindrical middle part in an axial longitudinal section,
Fig. 8
a portion of the straightening sleeve of FIG. 7 in an enlarged view and
Fig. 9
a cylindrical straightening bush.

Die Richtvorrichtung besteht aus einem in seinen Einzelteilen nicht näher dargestellten Antrieb 1, mit dem eine Welle 2 verbunden ist, auf der zwei Richtscheiben 3,4 oberhalb eines Doppel-T-Trägers 5 angeordnet sind. Dieser weist einen Steg 5a sowie zwei Flansche 5b und 5c auf. Die Richtscheiben 3,4 besitzen - in axialer Richtung - einen T-förmigen Querschnitt und bestehen aus einem jeweils an der Innenseite der beiden Flansche angreifenden, den Steg des Flansches jedoch nicht berührenden kreisscheibenförmigen Teil 6, der in einen kegelstumpfförmigen Ansatz 7 übergeht. Die kegelstumpfförmigen Ansätze 7 sind mit ihren Kleindurchmessertlächen 8 jeweils nach außen gerichtet und stehen über ihre Mantelflächen in kraftschlüssiger Verbindung mit den Flanschkanten. Dabei verläuft die Mantelfläche bzw. -linie 9 unter einem Winkel p in bezug auf die Oberfläche der Schmalseite des Flansches oder auf die Horizontale bzw. die Distanzbuchsen 10. Die Distanzbuchsen 10 dienen zum Einstellen des Abstandes der Richtscheiben auf die Profilhöhe (Flanschabstand) des zu richtenden Trägers. Dementsprechend ergibt sich zwischen der Mantellinie 9 und der Schmalseitenfläche der Flansche der Einschlußwinkel p. Die Höhe Z der kegelstumpfförmigen Ansätze ist so bemessen, dass die Schmalseiten der Flansche über ihre ganze Höhe abgestützt sind.The straightening device consists of a drive 1, not shown in detail in its individual parts, to which a shaft 2 is connected, on which two straightening disks 3, 4 are arranged above a double-T carrier 5. This has a web 5a and two flanges 5b and 5c. The straightening disks 3, 4 have a T-shaped cross-section in the axial direction and consist of a circular disk-shaped part 6, which acts on the inside of the two flanges and does not touch the web of the flange, which merges into a frustoconical projection 7. The frustoconical projections 7 are with their small diameter surfaces. 8 each directed to the outside and are on their lateral surfaces in frictional connection with the flange edges. In this case, the lateral surface or line 9 extends at an angle p with respect to the surface of the narrow side of the flange or on the horizontal or the spacers 10. The spacers 10 are used to set the distance of the straightening wheels on the profile height (flange distance) of judging vehicle. Accordingly, between the generatrix 9 and the narrow side surface of the flanges of the inclusion angle p. The height Z of the frusto-conical projections is dimensioned such that the narrow sides of the flanges are supported over their entire height.

Die Richtscheiben 11, 12 der Fig. 3 und 4 sind in prinzipiell gleicher Weise wie im Falle der Fig. 1, 2 angeordnet und aufgebaut; sie stützen die Flansche jedoch außenseitig ab und besitzen konische Ansatzflächen 7, deren Großdurchmesserflächen 13 nach innen weisen bzw. einander zugekehrt sind. Auf diese Weise ergibt sich zwischen den Mantelflächen bzw. -linien 9 und der Horizontalen bzw. den Schmalseiten der Trägerflansche jeweils der gleiche Einschlußwinkel wie bei den Richtscheiben 3,4 der Fig. 1, 2.The straightening disks 11, 12 of FIGS. 3 and 4 are arranged and constructed in basically the same way as in the case of FIGS. 1, 2; However, they support the flanges on the outside and have conical approach surfaces 7, whose large diameter surfaces 13 point inward or face each other. In this way results between the lateral surfaces or lines 9 and the horizontal or the narrow sides of the support flanges respectively the same inclusion angle as in the straightening disks 3.4 of FIG. 1, 2nd

Die Richtrollen 15,16 nach den Fig. 5, 6 bestehen aus mehreren, vorzugsweise einstückig miteinander verbundenen flanschstützenden Einzelscheiben 17,18,19,20, zwischen denen sich jeweils ein kegelstumpfförmiger Übergang 21,22,23 befindet. Auf diese Weise ergeben sich zwischen den Scheiben 16 bis 20 Rillen 24,25,26 zur Aufnahme der Flansche von Trägern mit unterschiedlichen Abmessungen. Die Mantellinien der kegelstumpfförmigen Übergänge 21,22,23 ergeben mit den ihnen gegenüberliegenden Schmalseiten der Flansche wiederum den bereits erörterten erfindungsgemäßen Einschlußwinkel p.The straightening rollers 15,16 according to FIGS. 5, 6 consist of several, preferably integrally interconnected flange-supporting individual discs 17,18,19,20, between each of which a frustoconical transition is 21,22,23. In this way, resulting between the discs 16 to 20 grooves 24,25,26 for receiving the flanges of carriers with different dimensions. The generatrices of the frustoconical transitions 21, 22, 23, with their opposite narrow sides of the flanges, in turn yield the inclusion angle p according to the invention, which has already been discussed.

Die für die Durchführung des erfindungsgemäßen Verfahrens zum Warmrichten geeignete Richtvorrichtung braucht nicht zur Gänze mit den winkeligen Richtwerkzeugen (Richtscheiben oder -buchsen) ausgestattet zu sein; vielmehr reicht es aus, wenn diese im Bereich der größten Biegungsamplituden, also einlaufseitig, angeordnet sind, die ohne die erfindungsgemäßen Richtwerkzeug auch zu den größten Aufstauchungen bzw. Maßabweichungen führen würden. Andererseits können aber auch sämtliche oberen Richtwerkzeuge als Scheiben oder Mehrscheibenrollen ausgebildet sein, wenn beim Richten mit großer Teilung (Abstand zweier benachbarter Richtachsen) und dementsprechend kleinen Richtkräften unterhalb des Richtgutes zylindrische Richtbuchsen 28 angeordnet sein können, die von Flansch zu Flansch reichen.The suitable for carrying out the method according to the invention for hot straightening straightening need not be fully equipped with the angular straightening tools (straightening discs or bushes); rather, it is sufficient if these are arranged in the region of the greatest bending amplitudes, that is to say on the inlet side, which would also lead to the greatest upsetting or dimensional deviations without the straightening tool according to the invention. On the other hand, however, all upper straightening tools may be formed as discs or multi-disc roles when judging with large pitch (distance between two adjacent straightening axes) and correspondingly small straightening forces below the straightening cylindrical straightening jacks 28 may be arranged ranging from flange to flange.

In den Fig. 7 bis 9 sind weitere Varianten der mit dem erfindungsgemäßen Verfahren einsetzbaren Vorrichtungen dargestellt. Gleiche Elemente sind mit gleichen Bezugsziffern gekennzeichnet.FIGS. 7 to 9 show further variants of the devices which can be used with the method according to the invention. Identical elements are identified by the same reference numbers.

Die dargestellten Vorrichtungen erlauben die unmittelbare Krafteinleitung in den Flansch eines Profils, wobei dadurch auch das Richten von warmen Profilen, die eine Temperatur oberhalb von 70° aufweisen, möglich ist.The illustrated devices allow the direct introduction of force into the flange of a profile, thereby also the straightening of hot profiles, which have a temperature above 70 °, is possible.

Claims (10)

  1. Method for levelling a profile, which has a web and at least one flange, by means of a dressing tool, wherein the levelling force is applied directly to the flange, characterized in that the profile is levelled in the hot state at a profile temperature >70°C.
  2. Method for manufacturing a standard profile, wherein the desired profile is produced by hot-rolling and wherein the profile is levelled by a method according to claim 1.
  3. Method according to claim 1 or 2, characterized in that the profile is levelled at profile temperatures of above 10a°C.
  4. Method according to one or more of claims 1 to 3, characterized in that the levelling force is exerted over a lateral face of the dressing tool, which runs at an angle relative to the surface of the flange, on which the dressing tool acts.
  5. Method according to one or more of claims 1 to 4, characterized in that the levelling forces are applied to the narrow side of the flange.
  6. Method according to any one of claims 1 to 5, characterized in that the profile, without further heating steps, is levelled in the hot state after hot-rolling.
  7. Use of a device for levelling a profile, which has a web and at least one flange, with a dressing tool, which applies the levelling force directly to the flange of the profile, for levelling profiles at profile temperatures of >70°C.
  8. Use according to claim 7, wherein the dressing tool is placed above the profile being levelled.
  9. Use according to either of claims 7 or 8, characterized in that the effective lateral face of the dressing tool runs at an angle relative to the surface of the flange, on which the dressing tool acts.
  10. Use according to claim 9, characterized in that the angle of inclination p of the effective lateral face lies in the order of magnitude of the friction angle between the dressing tool and the surface of the flange, on which the dressing tool acts.
EP04740428A 2003-06-30 2004-06-29 Method for leveling hot profiles Not-in-force EP1641575B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04740428T PL1641575T3 (en) 2003-06-30 2004-06-29 Method for leveling hot profiles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10329525A DE10329525B4 (en) 2003-06-30 2003-06-30 Method and device for directing a warm profile and method for producing a standardized profile
PCT/EP2004/007037 WO2005000495A1 (en) 2003-06-30 2004-06-29 Method for leveling hot profiles

Publications (2)

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EP1641575A1 EP1641575A1 (en) 2006-04-05
EP1641575B1 true EP1641575B1 (en) 2007-05-23

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US (1) US20080202187A1 (en)
EP (1) EP1641575B1 (en)
JP (1) JP2009513352A (en)
KR (1) KR20060033743A (en)
CN (1) CN100364682C (en)
AT (1) ATE362809T1 (en)
DE (2) DE10329525B4 (en)
ES (1) ES2285476T3 (en)
PL (1) PL1641575T3 (en)
RU (1) RU2366526C2 (en)
UA (1) UA85557C2 (en)
WO (1) WO2005000495A1 (en)

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DE102013216435A1 (en) * 2013-08-20 2015-02-26 Magna BDW technologies GmbH Machine and method for treating cast components
RU2564183C1 (en) * 2014-03-20 2015-09-27 Общество с ограниченной ответственностью "Хекса" Device to round edges of double-tee
DE102014011735A1 (en) 2014-08-06 2016-02-11 EcoEnterprises GmbH Supporting elements of a supporting structure, associated fasteners, and apparatus and methods for making the same
CN107030141B (en) * 2016-11-25 2019-01-15 南京东至南工程技术有限公司 A kind of device and method for correcting Steel section member
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US20080202187A1 (en) 2008-08-28
UA85557C2 (en) 2009-02-10
ES2285476T3 (en) 2007-11-16
CN100364682C (en) 2008-01-30
RU2006102511A (en) 2006-06-10
ATE362809T1 (en) 2007-06-15
EP1641575A1 (en) 2006-04-05
PL1641575T3 (en) 2007-10-31
WO2005000495A1 (en) 2005-01-06
JP2009513352A (en) 2009-04-02
DE10329525B4 (en) 2006-02-09
KR20060033743A (en) 2006-04-19
DE502004003891D1 (en) 2007-07-05
RU2366526C2 (en) 2009-09-10
DE10329525A1 (en) 2005-02-17
CN1812855A (en) 2006-08-02

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