EP1984130B1 - Straightening device and straightening method for a metal strip - Google Patents

Straightening device and straightening method for a metal strip Download PDF

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Publication number
EP1984130B1
EP1984130B1 EP07711483A EP07711483A EP1984130B1 EP 1984130 B1 EP1984130 B1 EP 1984130B1 EP 07711483 A EP07711483 A EP 07711483A EP 07711483 A EP07711483 A EP 07711483A EP 1984130 B1 EP1984130 B1 EP 1984130B1
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EP
European Patent Office
Prior art keywords
straightening
roller
metal strip
press roller
over
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EP07711483A
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German (de)
French (fr)
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EP1984130A1 (en
Inventor
Oswald Deutscher
Frank Gorgels
Jochen Kurzynski
Roger Lathe
Paul Dieter PÜTZ
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BETR FORSCH INST ANGEW FORSCH
BFI VDEH Institut fuer Angewandte Forschung GmbH
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BETR FORSCH INST ANGEW FORSCH
BFI VDEH Institut fuer Angewandte Forschung GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers

Definitions

  • the invention relates to a straightening device and a straightening process for a metal strip and takes the priority of the German patent application 10 2006 006 530.1 to complete.
  • temper rolling the mechanical properties are adjusted for a possible post-finishing deep drawing, such as the so-called n-value and the yield strength. Furthermore, the desired surface finish is set in the temper rolling process. With the stretch bending process, the desired flatness of the strip is finally produced.
  • the band extends around a work roll.
  • a first reaction roller forms a first nip with the work roll.
  • a second reaction roll forms a second nip with the work roll.
  • the pressure on the belt between the work roll and the two reaction rolls is applied by means of a pressure roll which presses on the work roll.
  • the pressure prevailing between the one reaction roller and the work roll must be high enough, in conjunction with the bending stresses present in the belt at that pressure point, to deform the material to a magnitude sufficient to limit the yield strength discontinuities, at least in the region of the surface to suppress lying layers.
  • the device described in Connection can be used with subsequent bending and / or smoothing rolls in any shape, arrangement and with any number of subsequent rolls. These bending and / or smoothing rollers can be used to achieve a further smoothing effect or to remove the roller set, which is also referred to as transverse bending or grooving.
  • the invention has for its object to simplify the finishing of metal strips.
  • the invention is based on the basic idea that the setting of mechanical properties, as has hitherto been carried out in the so-called temper rolling process, can also be set in a straightening process, for example a stretch bending process.
  • a straightening device is provided in addition to the conventional straightening rollers at least one pressure roller is provided, which is arranged opposite a straightening roller and with the one-sided compression deformation of the metal strip can be effected.
  • the pressure roller has a textured surface. This makes it possible to introduce a texturing in the metal strip surface.
  • a textured surface is understood in particular to mean a surface on which individual elevations or depressions are provided.
  • one of the surface types Shotblast, EDT, EBT (deterministic or pseudo-stochastic), Lasertex and topochrome can be provided.
  • the state of stress in the metal strip is utilized at the moment of its bending via the straightening roller.
  • a L Lucasszugnapssverlauf is set over the metal strip cross-section whose maximum value in the region of the straightening roller opposite surface of the metal strip is applied.
  • this surface is loaded with a pressure roller and thus at least the near-surface region is subjected to an additional voltage, at least in this area, a stress state can be set, which is above the yield point, so that the desired mechanical properties, eg. B. the n-value or the yield strength, but also the desired surface finish can be adjusted.
  • the straightening device has at least one first and one second straightening roller over which the metal band to be straightened can be guided in the meandering band guide typical for the bending layer.
  • the metal strip is passed partially looping over the first straightening roller and then partially wrapping over the second straightening roller, the first straightening roller contacting a first surface of the metal strip and the second straightening roller contacting the surface of the metal strip opposite that surface.
  • the straightening rollers can be employed, ie displaced in the radial direction or, for example, are pivoted about a pivot axis perpendicular to the longitudinal axis.
  • At least one pressure roller with a textured surface is provided, which is arranged to form a straightening roller as a counter roller and with which a one-sided compression deformation of the metal strip can be effected.
  • the pressure roller is adjustable and in particular has an active element with which the pressure roller with a predetermined pressure the metal band can be pressed.
  • support rollers may be provided which support the pressure roller.
  • the construction of the support of a pressure roller known from skin-passing stands can be provided for the support of the pressure roller in the straightening device according to the invention.
  • Unilateral compression deformation is understood in particular to mean a compression deformation of the metal strip which, in contrast to rolling, does not deform the metal strip over its entire cross-section.
  • a one-sided compression deformation understood a compression deformation, which has a penetration of about 75% of the metal strip cross-section of the surface acted upon by the pressure roller, more preferably 50% of the metal strip cross-section.
  • the compression set is limited to the area of the surface on which the pressure roller acts. This near-surface region has in particular at least the depth of the so-called Lüders bands.
  • a region with a penetration depth of a maximum of 10% of the metal strip cross-section, particularly preferably 1% of the cross-section of the metal strip is understood as the surface near the surface.
  • a first pressure roller is assigned as counter-roller and the second straightening roller is assigned a second pressure roller as counter-roller, wherein the first pressure roller has a textured surface and the second pressure roller has a smooth surface.
  • the first pressure roller has a textured surface
  • the second pressure roller has a smooth surface.
  • the first and / or the second straightening roller has a textured surface.
  • the straightening rollers and the pressure rollers may have the same diameter.
  • the pressure rollers may have larger or smaller diameters than the straightening rollers.
  • one or more straightening rollers or pressure rollers can be designed as a measuring roller.
  • the temperature, shear stress and / or pressure distribution is measured by this measuring roller.
  • the straightening method according to the invention provides that the metal strip bent over a straightening roll on the surface opposite the straightening roll is pressure-deformed on the side with a pressure roller with a textured surface. Particularly preferably, this compression deformation takes place only in the region of the surface of the metal strip.
  • a Lijnszugnapssverlauf is set over the metal strip cross-section, in which the applied to the straightening roller surface of the metal strip longitudinal tension is less than the yield strength of the metal strip and that by acting on this surface pressure roller an additional Stress is generated so that the metal strip is loaded in the region of this surface with a total stress above the yield point.
  • the method according to the invention and the straightening device according to the invention are particularly preferably used in a stretch bending process. Particularly preferred are the straightening rollers upstream and downstream braking and driving roller groups provided. Alternatively, the straightening method according to the invention and the straightening device according to the invention can be used in the context of a positive-locking bending machine.
  • the straightening method according to the invention and the straightening device according to the invention are used for straightening so-called carbon steels, which have a pronounced yield strength and thus exhibit Lüders straps during tensile deformation.
  • the straightening method is applied using a measuring roller.
  • This measuring roller is used in particular to adjust the mechanical properties and the flatness of the processed tapes. '
  • the straightening device of this embodiment has at least two straightening rollers with pressure rollers arranged opposite them, of which in the Fig. 1 only the first pair of straightening roller 1 and pressure roller 2 is shown. That too directing metal strip 3 is guided bent over the straightening roller 1 and subjected to Lssenszugêttress F Z.
  • the rectifying roller 1 opposite pressure roller 2 causes a one-sided compression deformation of the metal strip.
  • Fig. 2 the Lijnszugnapssverlauf is shown over the cross section of the metal strip. It can be seen that the longitudinal tensile stress is greatest in the area of the surface opposite the straightening roller 1. By creating an additional tension in this area by a pressure roller acting on the surface, the stress level in this area is increased above the illustrated longitudinal tension stress level and raised above the yield point so that the adjustment of mechanical properties or surface qualities can be achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)

Abstract

The present invention relates to a straightening device for a metal strip, comprising a first straightening roller and a second straightening roller which are arranged with respect to one another such that the metal strip is guided, while being enveloped by it, over the first straightening roller and then, while being enveloped by it, over the second straightening roller. One of the straightening rollers (1) is arranged opposite to a printing roller (2), with which a one-sided deformation by compression of the metal strip (3) can be brought about. The invention also relates to a straightening method.

Description

Die Erfindung betrifft eine Richtvorrichtung und ein Richtverfahren für ein Metallband und nimmt die Priorität der deutschen Patentanmeldung 10 2006 006 530.1 in Anspruch.The invention relates to a straightening device and a straightening process for a metal strip and takes the priority of the German patent application 10 2006 006 530.1 to complete.

Bei der Endbearbeitung von Metallbändern, beispielsweise von Feinblech werden in der Praxis regelmäßig zwei Prozessstufen eingesetzt. Zum einen der so genannte Dressierwalzprozess und zum anderen der Streckbiegerichtprozess. Beim Dressieren werden die mechanischen Eigenschaften für ein möglicherweise nach der Endbearbeitung erfolgendes Tiefziehen eingestellt, wie beispielsweise der so genannte n-Wert und die Streckgrenze. Ferner wird im Dressierprozess die gewünschte Oberflächenbeschaffenheit eingestellt. Mit dem Streckbiegerichtprozess wird dann abschließend die gewünschte Planheit des Bandes hergestellt.In the finishing of metal strips, for example of sheet metal, two process stages are regularly used in practice. On the one hand the so-called temper rolling and on the other hand the stretch bending process. In the case of temper rolling, the mechanical properties are adjusted for a possible post-finishing deep drawing, such as the so-called n-value and the yield strength. Furthermore, the desired surface finish is set in the temper rolling process. With the stretch bending process, the desired flatness of the strip is finally produced.

Aus der gattungsgemäßen DE 22 49 568 A1 ist ein Verfahren und eine Vorrichtung zum Richten von Blechen und Bändern aus Metall bekannt, mit denen die Bleche, bzw. die Bänder geglättet werden können, ohne dass es zu der Ausbildung von Mikroriffelungen kommt. Bei der dort beschriebenen Vorrichtung verläuft das Band um eine Arbeitswalze. Eine erste Reaktionswalze bildet mit der Arbeitswalze einen ersten Walzspalt. Eine zweite Reaktionswalze bildet mit der Arbeitswalze einen zweiten Walzspalt. Der zwischen der Arbeitswalze und den beiden Reaktionswalzen erfolgende Druck auf das Band wird mittels einer Druckwalze aufgebracht, die auf die Arbeitswalze drückt. Der zwischen der einen Reaktionswalze und der Arbeitswalze herrschende Druck muss hoch genug sein, damit in Verbindung mit den in dem Band an diesem Druckpunkt vorhandenen Biegebeanspruchungen das Material in einer Größe verformt wird, welche ausreicht, um die Unstetigkeiten der Streckgrenze zumindest in dem Bereich der Oberfläche liegenden Schichten zu unterdrücken. Gemäß DE 22 49 568 A1 kann die dort beschriebene Vorrichtung in Verbindung mit anschließenden Biege- und/oder Glättwalzen in jeder Form, Anordnung und mit jeder möglichen Anzahl von anschließenden Walzen verwendet werden. Diese Biege- und/oder Glättwalzen können dazu verwendet werden, um eine weitere Glättwirkung zu erzielen oder um den Rollensatz, welche auch als Querbiegung oder Rillung bezeichnet wird, zu entfernen.From the generic DE 22 49 568 A1 a method and an apparatus for straightening sheets and strips of metal is known, with which the sheets, or the bands can be smoothed without it comes to the formation of micro-corrugations. In the apparatus described there, the band extends around a work roll. A first reaction roller forms a first nip with the work roll. A second reaction roll forms a second nip with the work roll. The pressure on the belt between the work roll and the two reaction rolls is applied by means of a pressure roll which presses on the work roll. The pressure prevailing between the one reaction roller and the work roll must be high enough, in conjunction with the bending stresses present in the belt at that pressure point, to deform the material to a magnitude sufficient to limit the yield strength discontinuities, at least in the region of the surface to suppress lying layers. According to DE 22 49 568 A1 can the device described in Connection can be used with subsequent bending and / or smoothing rolls in any shape, arrangement and with any number of subsequent rolls. These bending and / or smoothing rollers can be used to achieve a further smoothing effect or to remove the roller set, which is also referred to as transverse bending or grooving.

Aus der US 3/605,470 ist es bekannt, eine Vorrichtung mit einer ersten Rolle und einer zweiten Rolle vorzusehen, die derart zueinander angeordnet sind, dass ein Metallband unter teilweiser Umschlingung über die erste Rolle und dann unter teilweiser Umschlingung über die zweite Rolle geführt wird. Der ersten Rolle sind zwei Hohlzylinder gegenüberliegend angeordnet, sodass zwischen der ersten Rolle und den beiden Hohlzylindern ein Spalt gebildet wird. Ferner ist eine Stützwalze vorgesehen, die die erste Rolle stützt. Diese Stützrolle wird wiederum über elastische Stützen abgestützt.From the US 3 / 605,470 It is known to provide a device with a first roller and a second roller, which are arranged to each other such that a metal strip is guided under partial wrapping over the first roller and then under partial wrapping over the second roller. The first roller is arranged opposite two hollow cylinders, so that a gap is formed between the first roller and the two hollow cylinders. Further, a backup roller is provided which supports the first roller. This support roller is in turn supported by elastic supports.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, die Endbearbeitung von Metallbändern zu vereinfachen.Against this background, the invention has for its object to simplify the finishing of metal strips.

Diese Aufgabe wird durch die Gegenstände der nebengeordneten Ansprüche gelöst. Vorteilhafte Ausführungsformen sind in den Unteransprüchen angegeben.This object is achieved by the subject matters of the independent claims. Advantageous embodiments are specified in the subclaims.

Die Erfindung geht von dem Grundgedanken aus, dass das Einstellen mechanischer Eigenschaften, wie es bisher in dem so genannten Dressierwalzprozess erfolgt ist, auch in einem Richtprozess, beispielsweise einem Streckbiegerichtvorgang, eingestellt werden kann. Dafür wird eine Richtvorrichtung vorgesehen, bei der zu den herkömmlichen Richtrollen zusätzlich zumindest eine Druckwalze vorgesehen wird, die einer Richtrolle gegenüberliegend angeordnet ist und mit der eine einseitige Druckverformung des Metallbands bewirkt werden kann. Die Druckwalze weist eine texturierte Oberfläche auf. Damit ist es möglich, eine Texturierung in die Metallbandoberfläche einzubringen. Unter einer texturierten Oberfläche wird insbesondere eine Oberfläche verstanden, auf der einzelne Erhebungen oder Vertiefungen vorgesehen sind. Insbesondere kann einer der Oberflächentypen Shotblast, EDT, EBT (deterministisch oder pseudostochastisch), Lasertex und Topochrom vorgesehen sein.The invention is based on the basic idea that the setting of mechanical properties, as has hitherto been carried out in the so-called temper rolling process, can also be set in a straightening process, for example a stretch bending process. For a straightening device is provided in addition to the conventional straightening rollers at least one pressure roller is provided, which is arranged opposite a straightening roller and with the one-sided compression deformation of the metal strip can be effected. The pressure roller has a textured surface. This makes it possible to introduce a texturing in the metal strip surface. A textured surface is understood in particular to mean a surface on which individual elevations or depressions are provided. In particular, one of the surface types Shotblast, EDT, EBT (deterministic or pseudo-stochastic), Lasertex and topochrome can be provided.

Erfindungsgemäß wird der Spannungszustand im Metallband im Moment seiner Biegung über die Richtrolle ausgenutzt. Durch die Biegung wird ein Längszugspannungsverlauf über den Metallbandquerschnitt eingestellt, dessen maximaler Wert im Bereich der der Richtrolle gegenüberliegenden Oberfläche des Metallbands anliegt. Indem nun diese Oberfläche mit einer Druckwalze belastet wird und damit zumindest der oberflächennahe Bereich mit einer zusätzlichen Spannung beaufschlagt wird, kann zumindest in diesem Bereich ein Spannungszustand eingestellt werden, der oberhalb der Fließgrenze liegt, so dass die gewünschten mechanischen Eigenschaften, z. B. der n-Wert oder die Streckgrenze, aber auch die gewünschte Oberflächenbeschaffenheit eingestellt werden können.According to the invention, the state of stress in the metal strip is utilized at the moment of its bending via the straightening roller. By bending a Längszugspannungsverlauf is set over the metal strip cross-section whose maximum value in the region of the straightening roller opposite surface of the metal strip is applied. By now this surface is loaded with a pressure roller and thus at least the near-surface region is subjected to an additional voltage, at least in this area, a stress state can be set, which is above the yield point, so that the desired mechanical properties, eg. B. the n-value or the yield strength, but also the desired surface finish can be adjusted.

Die erfindungsgemäße Richtvorrichtung weist mindestens eine erste und eine zweite Richtrolle auf, über die das zu richtende Metallband in der für das Biegerichten typischen mäandemden Bandführung geführt werden kann. Das Metallband wird unter teilweiser Umschlingung über die erste Richtrolle und dann unter teilweiser Umschlingung über die zweite Richtrolle geführt, wobei die erste Richtrolle mit einer ersten Oberfläche des Metallbands in Kontakt kommt und die zweite Richtrolle mit der dieser Oberfläche gegenüberliegenden Oberfläche des Metallbands in Kontakt kommt. Um den Grad der Biegung des Metallbands einstellen zu können, können die Richtrollen angestellt werden, also in Radialrichtung verlagert oder beispielsweise um eine senkrecht zur Längsachse stehenden Schwenkachse verschwenkt werden.The straightening device according to the invention has at least one first and one second straightening roller over which the metal band to be straightened can be guided in the meandering band guide typical for the bending layer. The metal strip is passed partially looping over the first straightening roller and then partially wrapping over the second straightening roller, the first straightening roller contacting a first surface of the metal strip and the second straightening roller contacting the surface of the metal strip opposite that surface. In order to adjust the degree of bending of the metal strip, the straightening rollers can be employed, ie displaced in the radial direction or, for example, are pivoted about a pivot axis perpendicular to the longitudinal axis.

Erfindungsgemäß ist mindestens eine Druckwalze mit texturierter Oberfläche vorgesehen, die zu einer Richtrolle als Gegenwalze angeordnet ist und mit der eine einseitige Druckverformung des Metallbands bewirkt werden kann. Um den für die Einstellung der gewünschten mechanischen Eigenschaften bzw. der gewünschten Oberflächenbeschaffenheit notwendigen Spannungszustand auf der durch die Druckwalze belasteten Seite des Metallbands einstellen zu können, ist die Druckwalze einstellbar ausgebildet und weist insbesondere einen Wirkelement auf, mit dem die Druckwalze mit einem vorbestimmten Druck auf das Metallband gedrückt werden kann. Ergänzend oder alternativ können Stützwalzen vorgesehen sein, die die Druckwalze abstützen. Grundsätzlich kann der aus Dressiergerüsten bekannte Aufbau der Abstützung einer Druckwalze für die Abstützung der Druckwalze in der erfindungsgemäßen Richtvorrichtung vorgesehen sein.According to the invention, at least one pressure roller with a textured surface is provided, which is arranged to form a straightening roller as a counter roller and with which a one-sided compression deformation of the metal strip can be effected. In order to set the necessary for the setting of the desired mechanical properties or the desired surface condition tension on the loaded by the pressure roller side of the metal strip, the pressure roller is adjustable and in particular has an active element with which the pressure roller with a predetermined pressure the metal band can be pressed. Additionally or alternatively, support rollers may be provided which support the pressure roller. In principle, the construction of the support of a pressure roller known from skin-passing stands can be provided for the support of the pressure roller in the straightening device according to the invention.

Als einseitige Druckverformung wird insbesondere eine Druckverformung des Metallbands verstanden, die im Gegensatz zum Walzen nicht das Metallband über seinen gesamten Querschnitt druckverformt. Insbesondere bevorzugt wird unter einer einseitigen Druckverformung eine Druckverformung verstanden, die von der mit der Druckwalze beaufschlagten Oberfläche eine Eindringtiefe von ca. 75% des Metallbandquerschnitts aufweist, insbesondere bevorzugt 50% des Metallbandquerschnitts. In einer bevorzugten Ausführungsform wird die Druckverformung auf den Bereich der Oberfläche beschränkt, auf die die Druckwalze einwirkt. Dieser oberflächennahe Bereich weist insbesondere mindestens die Tiefe der sogenannten Lüdersbänder auf. Als oberflächen naher Bereich wird insbesondere ein Bereich mit einer Eindringtiefe von maximal 10% des Metallbandquerschnitts, insbesondere bevorzugt 1% des Metanbandquerschnitts verstanden.Unilateral compression deformation is understood in particular to mean a compression deformation of the metal strip which, in contrast to rolling, does not deform the metal strip over its entire cross-section. Particular preference is given to a one-sided compression deformation understood a compression deformation, which has a penetration of about 75% of the metal strip cross-section of the surface acted upon by the pressure roller, more preferably 50% of the metal strip cross-section. In a preferred embodiment, the compression set is limited to the area of the surface on which the pressure roller acts. This near-surface region has in particular at least the depth of the so-called Lüders bands. In particular, a region with a penetration depth of a maximum of 10% of the metal strip cross-section, particularly preferably 1% of the cross-section of the metal strip, is understood as the surface near the surface.

In einer bevorzugten Ausführungsform ist in der ersten Richtrolle eine erste Druckwalze als Gegenwalze und der zweiten Richtrolle eine zweite Druckwalze als Gegenwalze zugeordnet, wobei die erste Druckwalze eine texturierte Oberfläche und die zweite Druckwalze eine glatte Oberfläche aufweist. Dies ermöglichst es, auf der einen Seite des Metallbands eine texturierte Oberfläche einzuprägen, während auf der gegenüberliegenden Seite des Metallbands eine glatte Oberfläche erzeugt wird. Alternativ kann die zweite Druckwalze ebenfalls eine texturierte Oberfläche aufweisen.In a preferred embodiment, in the first straightening roller, a first pressure roller is assigned as counter-roller and the second straightening roller is assigned a second pressure roller as counter-roller, wherein the first pressure roller has a textured surface and the second pressure roller has a smooth surface. This makes it possible to emboss a textured surface on one side of the metal strip while creating a smooth surface on the opposite side of the metal strip. Alternatively, the second pressure roller may also have a textured surface.

In einer bevorzugten Ausführungsform der Erfindung weist die erste und/oder die zweite Richtrolle eine texturierte Oberfläche auf.In a preferred embodiment of the invention, the first and / or the second straightening roller has a textured surface.

In einer bevorzugten Ausführungsform können die Richtrollen und die Druckwalzen den gleichen Durchmesser aufweisen. Alternativ können die Druckwalzen größere oder kleinere Durchmesser als die Richtrollen aufweisen.In a preferred embodiment, the straightening rollers and the pressure rollers may have the same diameter. Alternatively, the pressure rollers may have larger or smaller diameters than the straightening rollers.

In einer bevorzugten Ausführungsform können eine oder mehrere Richtrollen oder Druckrollen als Messrolle ausgeführt werden. Insbesondere wird durch diese Messrolle die Temperatur-, Schubspannungs- und/oder Druckverteilung gemessen.In a preferred embodiment, one or more straightening rollers or pressure rollers can be designed as a measuring roller. In particular, the temperature, shear stress and / or pressure distribution is measured by this measuring roller.

Das erfindungsgemäße Richtverfahren sieht vor, dass das über eine Richtrolle gebogene Metallband auf der der Richtrolle gegenüberliegenden Oberfläche ein seitig mit einer Druckwalze mit texturierter Oberfläche druckverformt wird. Insbesondere bevorzugt erfolgt diese Druckverformung nur im Bereich der Oberfläche des Metallbands.The straightening method according to the invention provides that the metal strip bent over a straightening roll on the surface opposite the straightening roll is pressure-deformed on the side with a pressure roller with a textured surface. Particularly preferably, this compression deformation takes place only in the region of the surface of the metal strip.

Insbesondere bevorzugt wird in dem Metallband durch das Biegen über die Richtrolle eine Längszugspannungsverlauf über den Metallbandquerschnitt eingestellt, bei dem die an der der Richtrolle gegenüberliegenden Oberfläche des Metallbands anliegende Längszugspannung geringer ist als die Fließgrenze des Metallbands und dass durch eine auf diese Oberfläche einwirkende Druckwalze eine zusätzliche Spannung erzeugt wird, so dass das Metallband im Bereich dieser Oberfläche mit einer Gesamtspannung oberhalb der Fließgrenze belastet wird.Particularly preferred in the metal strip by bending over the straightening roller a Längszugspannungsverlauf is set over the metal strip cross-section, in which the applied to the straightening roller surface of the metal strip longitudinal tension is less than the yield strength of the metal strip and that by acting on this surface pressure roller an additional Stress is generated so that the metal strip is loaded in the region of this surface with a total stress above the yield point.

Das erfindungsgemäße Verfahren und die erfindungsgemäße Richtvorrichtung werden insbesondere bevorzugt in einem Streckbiegerichtprozess eingesetzt. Insbesondere bevorzugt sind den Richtrollen vor- bzw. nachgeordnet Brems- und Treibrollengruppen vorgesehen. Alternativ können das erfindungsgemäße Richtverfahren und die erfindungsgemäße Richtvorrichtung im Rahmen einer Formschlussbiegemaschine eingesetzt werden.The method according to the invention and the straightening device according to the invention are particularly preferably used in a stretch bending process. Particularly preferred are the straightening rollers upstream and downstream braking and driving roller groups provided. Alternatively, the straightening method according to the invention and the straightening device according to the invention can be used in the context of a positive-locking bending machine.

Insbesondere bevorzug wird das erfindungsgemäße Richtverfahren und die erfindungsgemäße Richtvorrichtung zum Richten von sogenannten Kohlenstoffstählen verwendet, die eine ausgeprägte Streckgrenze aufweisen und damit bei Zugverformung Lüdersbänder zeigen.In particular, the straightening method according to the invention and the straightening device according to the invention are used for straightening so-called carbon steels, which have a pronounced yield strength and thus exhibit Lüders straps during tensile deformation.

Insbesondere bevorzugt wird das Richtverfahren unter Nutzung einer Messrolle angewendet. Diese Messrolle wird verwendet, um insbesondere die mechanischen Eigenschaften und die Planheit der verarbeiteten Bänder einzustellen. 'Particularly preferably, the straightening method is applied using a measuring roller. This measuring roller is used in particular to adjust the mechanical properties and the flatness of the processed tapes. '

Nachfolgend wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Darin zeigen:

Fig. 1
eine Richtrolle und die der Richtrolle gegenüberliegen angeordnete Druckwalze der erfindungsgemäßen Richtvorrichtung in einer schemati- schen Seitenansicht und
Fig. 2
den in dem Metallband durch das Biegen über die Richtrolle eingestellten Längszugspannungsverlauf über den Metallbandquerschnitt.
The invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment. Show:
Fig. 1
a straightening roller and the pressure roller of the straightening device according to the invention arranged opposite the straightening roller in a schematic side view and
Fig. 2
the set in the metal strip by bending over the straightening roll Längszugspannungsverlauf over the metal strip cross-section.

Die Richtvorrichtung dieses Ausführungsbeispiels weist mindestens zwei Richtrollen mit ihnen gegenüberliegen angeordneten Druckwalzen auf, von denen in der Fig. 1 nur die erste Paarung aus Richtrolle 1 und Druckwalze 2 dargestellt ist. Das zu richtende Metallband 3 ist über die Richtrolle 1 gebogen geführt und mit Längszugspannungen FZ beaufschlagt. Die der Richtrolle 1 gegenüberliegende Druckwalze 2 bewirkt eine einseitige Druckverformung des Metallbands 3.The straightening device of this embodiment has at least two straightening rollers with pressure rollers arranged opposite them, of which in the Fig. 1 only the first pair of straightening roller 1 and pressure roller 2 is shown. That too directing metal strip 3 is guided bent over the straightening roller 1 and subjected to Längszugspannungen F Z. The rectifying roller 1 opposite pressure roller 2 causes a one-sided compression deformation of the metal strip. 3

In Fig. 2 ist der Längszugspannungsverlauf über den Querschnitt des Metallbands dargestellt. Zu erkennen ist, dass die Längszugspannung im Bereich der der Richtrolle 1 gegenüberliegenden Oberfläche am größten ist. In dem in diesem Bereich durch eine auf die Oberfläche einwirkende Druckwalze eine zusätzliche Spannung erzeugt wird, wird das Spannungsniveau in diesem Bereich über das dargestellte Längszugspannungsniveau erhöht und über die Fließgrenze angehoben, so dass die Einstellung von mechanischen Eigenschaften oder Oberflächenbeschaffenheiten erreicht werden kann.In Fig. 2 the Längszugspannungsverlauf is shown over the cross section of the metal strip. It can be seen that the longitudinal tensile stress is greatest in the area of the surface opposite the straightening roller 1. By creating an additional tension in this area by a pressure roller acting on the surface, the stress level in this area is increased above the illustrated longitudinal tension stress level and raised above the yield point so that the adjustment of mechanical properties or surface qualities can be achieved.

Claims (8)

  1. Straightening device for a metal strip, with a first straightening roller and a second straightening roller which are arranged with respect to each other such that the metal strip is guided over, while being partly wrapped over, the first straightening roller and then guided over, while being partly wrapped over, the second straightening roller, wherein one of the straightening rollers (1) is arranged opposite a press roller (2) with which a unilateral compression deformation of the metal strip (3) can be achieved, characterised in that the press roller (2) has a textured surface.
  2. Straightening device according to claim 1, characterised in that the first straightening roller (1) is arranged opposite a first press roller (2) with which a unilateral compression deformation can be achieved on a first side of the metal strip (3), and the second straightening roller (1) is arranged opposite a second press roller (2) with which a unilateral compression deformation can be achieved on a second side of the metal strip (3), wherein the first and/or second press roller has a textured surface.
  3. Straightening device according to claim 2, characterised in that the first press roller (2) has a textured surface and the second press roller (2) has a smooth surface.
  4. Straightening device according to any of claims 1 to 3, characterised in that the first and/or second straightening roller (1) has/have a textured surface.
  5. Straightening device according to any of claims 1 to 4, characterised in that a press roller (2) and/or a straightening roller (1) is formed as a measurement roller.
  6. Straightening method for a metal strip, characterised in that the metal strip (3) bent over a straightening roller (1) is unilaterally compression deformed on the surface opposite the straightening roller (1) by a press roller (2) with textured surface.
  7. Straightening method according to claim 6, characterised in that the unilateral compression deformation has a penetration depth of the surface exposed to the press roller (2) of 75% of the metal strip cross-section.
  8. Straightening method according to claim 6 or 7, characterised in that in the metal strip (3), by bending over the straightening roller (1), a longitudinal tensile stress development is set over the metal strip cross-section, in which the longitudinal tension stress on the surface of the metal strip (3) lying opposite the straightening roller (1) is less than the yield point, and in that a press roller (2) acting on this surface generates an additional stress such that the metal strip (3) in the area of this surface is loaded with a total stress above the yield point.
EP07711483A 2006-02-10 2007-02-09 Straightening device and straightening method for a metal strip Not-in-force EP1984130B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006006530A DE102006006530A1 (en) 2006-02-10 2006-02-10 Straightening device and straightening method for a metal strip
PCT/EP2007/001114 WO2007090663A1 (en) 2006-02-10 2007-02-09 Straightening device and straightening method for a metal strip

Publications (2)

Publication Number Publication Date
EP1984130A1 EP1984130A1 (en) 2008-10-29
EP1984130B1 true EP1984130B1 (en) 2010-06-23

Family

ID=38093049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07711483A Not-in-force EP1984130B1 (en) 2006-02-10 2007-02-09 Straightening device and straightening method for a metal strip

Country Status (4)

Country Link
EP (1) EP1984130B1 (en)
AT (1) ATE471771T1 (en)
DE (2) DE102006006530A1 (en)
WO (1) WO2007090663A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020106730A1 (en) 2020-03-12 2021-09-16 Manfred Wanzke Straightening process for strip, wire, profiles, rods, tubes, blanks, sandwich sheets and blanks, in which the material to be straightened initially experiences any, approximately uniform curvature, which is then finally straightened in the run

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1489722A (en) * 1965-08-23 1967-07-28 Loire Atel Forges Method and device for hardening and leveling a metal strip
US3605470A (en) * 1969-01-27 1971-09-20 Natalis H Polakowski Pressure assisted tension roller leveler
AU466254B2 (en) * 1971-09-14 1975-10-23 John Lysaght (Australia) Limited Method of flattening metal strip exhibiting a discontinuous yield point and suppressing the discontinuous yield point
DE4236657C2 (en) * 1992-10-30 2002-04-04 Betr Forsch Inst Angew Forsch Deflecting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020106730A1 (en) 2020-03-12 2021-09-16 Manfred Wanzke Straightening process for strip, wire, profiles, rods, tubes, blanks, sandwich sheets and blanks, in which the material to be straightened initially experiences any, approximately uniform curvature, which is then finally straightened in the run

Also Published As

Publication number Publication date
WO2007090663A1 (en) 2007-08-16
DE102006006530A1 (en) 2007-08-16
EP1984130A1 (en) 2008-10-29
DE502007004187D1 (en) 2010-08-05
ATE471771T1 (en) 2010-07-15

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