EP1644137B1 - Method for producing a plurality of bent extruded profiles - Google Patents
Method for producing a plurality of bent extruded profiles Download PDFInfo
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- EP1644137B1 EP1644137B1 EP04740499A EP04740499A EP1644137B1 EP 1644137 B1 EP1644137 B1 EP 1644137B1 EP 04740499 A EP04740499 A EP 04740499A EP 04740499 A EP04740499 A EP 04740499A EP 1644137 B1 EP1644137 B1 EP 1644137B1
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- extruded profiles
- extrusion
- curved
- curvature
- extruded
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, rods or tubes
- B21C23/12—Extruding bent tubes or rods
Definitions
- the present invention relates to a method for producing a plurality of curved extruded profiles of light metal or a light metal alloy.
- the extruded profiles may have a complex hollow profile cross-section, including in particular those with large differences in wall thickness, but also those that have a small wall thickness based on the circumscribing circle of the extruded profile, are understood.
- profile pieces are used as construction elements, such as window frames and roof rails, or as decorative components, such as moldings and panels.
- the object of the invention is to improve a method of the type mentioned above in such a way that the productivity of the extrusion device is increased.
- the "sign" of the curvature of an extruded profile is understood here in the conventional mathematical sense, d. H. when moving in the pressing direction, an extruded profile is positively curved when it curves in the counterclockwise direction, while a negative curvature means a clockwise curvature.
- a curvature of two extruded profiles of opposite sign thus means that an extruded profile is curved in the positive direction, while another extruded profile is curved in the negative direction.
- the inventive method has the advantage that by extruding and bending several extruded profiles, the productivity in the production of extruded profiles can be increased. Since the extruded profiles are provided with a curvature such that the curvature of an extruded profile to the curvature of another extruded profile is opposite, a simultaneous curvature of the extruded profiles without mutual interference in the bending process is possible. By extruding and bending, for example, two extruded profiles by means of the method according to the invention is thus already expected in about a doubling of productivity.
- the extruded profiles are curved with a curvature of the same size, but with an opposite sign.
- size of a curvature is meant, as in the conventional mathematical sense, the reciprocal of the radius of a curvature.
- a curvature of extruded profiles with opposite signs and the same size thus means that the extruded profiles are curved mirror-symmetrically. If the extruded profiles are still mirror-symmetrical in their cross-sectional shape can thus be produced from the extruded profiles advantageously mirror-symmetrical workpieces, such as left and right workpieces, or front and rear workpieces.
- the extrusion die is designed so that at least two superimposed extruded profiles are formed.
- the at least two superimposed extruded profiles are then curved simultaneously and with a curvature of the same sign.
- the superimposed extruded profiles are exclusively positively or exclusively negatively curved.
- two superimposed extruded profiles can have a positive curvature
- the other two superimposed extruded profiles have a negative curvature.
- the superimposed extruded profiles can advantageously not only have a curvature of the same sign, but also a curvature of the same size. In terms of process technology, this means that such superimposed extruded profiles in the same way and in particular with a single guide tool, which for processing designed by several extruded profiles, can be curved.
- the extruded profiles are not bent, but rounded.
- the extruded profiles are curved simultaneously with or immediately after the shaping extrusion process by a force acting on the profile transversely to the extrusion direction, which already causes a curvature of the profile upon exiting the extrusion die. More specifically, a reaction of the applied force through the extruded profile takes place in the forming zone, wherein a force component as a tensile or compressive force causes a curvature of the extruded profile in the plastic state as it exits the extrusion die.
- Rounded curved workpieces have profile cross sections identical to those produced by straight extrusion. In particular, the rounding thus also allows a curvature of complex hollow profile cross sections.
- the curved extruded profiles are cut to length by a single cutting tool, the cutting tool is conveniently placed in the extension of the press axis of the extrusion device.
- the cutting tool for example, two exiting extruded profiles with a curvature of opposite sign can be cut to length by a mere pivotal movement of the separating tool on a rotary base.
- the inventive method is particularly advantageous for increasing the productivity of extruded profiles of magnesium or its alloys or difficult to press aluminum alloys, since extruded profiles of these materials are characterized by a particularly low exit velocity from the extrusion die.
- the extruded profiles are deflected at the exit from the die before bending such that the strand exit direction extends obliquely forward against the later curvature of a curved workpiece.
- larger radii of curvature can be achieved given the dimensions of a press outlet, in particular the diameter of the opening cone of the counterstay.
- an extrusion press 1 is shown with a counter-spar 2.
- Extruded sections 4, 5 made of a light metal or a light metal alloy emerge from the opening cone 3 of the counterweight 2.
- the extruded profile 4 is rounded by a guide tool 6 guided on a linear axis 7.
- the extruded profile 5 is rounded by a guided on a linear axis 9 guide tool 8.
- the guide tool 6 and 8 is exercised by the guide tool 6 and 8 on the extruded profile 5 and 4 simultaneously with or immediately after the shaping extrusion process by a transversely to the extrusion direction on the profile force acting, which causes a curvature of the profile already at the exit from the extrusion die. Since an action of the force acting on the extruded profile takes place in the forming zone, a force component as tensile or compressive force causes a curvature of the extruded profiles already in the plastic state when they exit from the extrusion die.
- the two extruded profiles 4, 5 are thereby provided in a pressing direction containing the horizontal plane with a curvature opposite sign, d. H. the extruded profile 5 is positively curved in the press direction, while the extruded profile 4 is negatively curved.
- the two extruded profiles 4, 5 are cut to length by a single, a dicing saw 10 supporting separation robot 11 in the desired manner.
- the dicing saw 10 can by the swing arm, which is rotatably mounted on the rotary base 12 of the separating robot 11, between the two extruded profiles 4, 5 are pivoted.
- the extruded profiles 4, 5 are guided after exiting the extrusion device 1 on the guide surfaces 13, 14 (discharge tables).
- a lengthening of the extruded profiles 4, 5 takes place in the intermediate space between extrusion device 1 and guide surfaces 13, 14th
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- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Forging (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung einer Mehrzahl gekrümmter Strangpressprofile aus Leichtmetall oder einer Leichtmetalllegierung. Die Strangpressprofile können einen komplexen Hohlprofilquerschnitt haben, worunter insbesondere solche mit großen Wanddickenunterschieden, aber auch solche, die eine geringe Wandstärke bezogen auf den umschreibenden Kreis des Strangpressprofils aufweisen, verstanden werden.The present invention relates to a method for producing a plurality of curved extruded profiles of light metal or a light metal alloy. The extruded profiles may have a complex hollow profile cross-section, including in particular those with large differences in wall thickness, but also those that have a small wall thickness based on the circumscribing circle of the extruded profile, are understood.
Beispielsweise im Automobilbau werden derartige Profilstücke etwa als Konstruktionselemente, wie Fensterrahmen und Dachreling, oder als dekorative Bauteile, wie Zierleisten und Blenden, eingesetzt.For example, in automotive such profile pieces are used as construction elements, such as window frames and roof rails, or as decorative components, such as moldings and panels.
Zur gleichzeitigen Erzeugung einer Mehrzahl von Strangpreßprofilen ist es aus
Bei der Herstellung von gekrümmten Strangpressprofilen werden herkömmlich Einzelstränge durch Runden oder Biegen gekrümmt. Nachteilig hierbei ist, dass die Produktivität bei der Herstellung von der beim Strangpressen eingesetzten Strangpressgeschwindigkeit abhängt. Einer Steigerung der Strangpressgeschwindigkeit sind jedoch durch die hierdurch erforderliche Erhöhung des Pressendrucks und der damit verbundenen Auslegung der Strangpressvorrichtung Grenzen gesetzt. Dies gilt insbesondere für schwer verpressbare Legierungen bzw. Legierungen mit einer geringen Austrittsgeschwindigkeit aus der Strangpressvorrichtung, wie z. B. Magnesium oder dessen Legierungen bzw. schwer pressbare Aluminiumlegierungen (z. B. 7000er-Legierungen).In the production of curved extruded sections, individual strands are conventionally curved by rounding or bending. The disadvantage here is that the productivity in the production depends on the extrusion rate used in extrusion. An increase in extrusion speed, however, are limited by the required thereby increasing the press pressure and the associated design of the extrusion device. This applies in particular to alloys or alloys which are difficult to compress and have a low exit velocity from the extrusion press apparatus, such as As magnesium or its alloys or difficult to press aluminum alloys (eg 7000er alloys).
Aufgabe der Erfindung ist es ein Verfahren der oben genannten Art dergestalt zu verbessern, daß die Produktivität der Strangpressvorrichtung erhöht wird.The object of the invention is to improve a method of the type mentioned above in such a way that the productivity of the extrusion device is increased.
Gelöst wird diese Aufgabe durch ein Verfahren zur Herstellung einer Mehrzahl gekrümmter Strangpressprofile aus Leichtmetall-oder einer Leichtmetalllegierung mit den Merkmalen des Patentanspruchs 1.This object is achieved by a method for producing a plurality of curved extruded profiles of light metal or a light metal alloy having the features of patent claim 1.
Das "Vorzeichen" der Krümmung eines Strangpressprofils sei hier im herkömmlichen mathematischen Sinne verstanden, d. h. bei Bewegung in Pressrichtung ist ein Strangpressprofil positiv gekrümmt, wenn es sich im Gegenuhrzeigersinn krümmt, während eine negative Krümmung eine Krümmung im Uhrzeigersinn bedeutet. Eine Krümmung von zwei Strangpressprofilen mit entgegengesetztem Vorzeichen meint somit, dass ein Strangpressprofil in positiver Richtung gekrümmt wird, während ein anderes Strangpressprofil in negativer Richtung gekrümmt wird.The "sign" of the curvature of an extruded profile is understood here in the conventional mathematical sense, d. H. when moving in the pressing direction, an extruded profile is positively curved when it curves in the counterclockwise direction, while a negative curvature means a clockwise curvature. A curvature of two extruded profiles of opposite sign thus means that an extruded profile is curved in the positive direction, while another extruded profile is curved in the negative direction.
Bei der Definition des erfindungsgemäßen Verfahrens wurde eine Betrachtungsebene eingeführt, da Strangpressprofile nicht nur innerhalb einer die Pressrichtung enthaltenden Ebene gleichsam zweidimensional gekrümmt werden können, sondern generell dreidimensional im Raum gekrümmt werden können.In the definition of the method according to the invention, a viewing plane was introduced, since extruded profiles can not only be curved two-dimensionally within a plane containing the pressing direction, but can generally be curved three-dimensionally in space.
Das erfindungsgemäße Verfahren hat den Vorteil, dass durch das Strangpressen und Krümmen mehrerer Strangpressprofile die Produktivität bei der Herstellung der Strangpressprofile erhöht werden kann. Da die Strangpressprofile mit einer Krümmung versehen werden, derart, dass die Krümmung eines Strangpressprofils zu der Krümmung eines anderen Strangpressprofils gegensätzlich ist, ist eine gleichzeitige Krümmung der Strangpressprofile ohne gegenseitige Behinderung beim Krümmungsvorgang möglich. Durch Strangpressen und Krümmen von beispielsweise zwei Strangpressprofilen mittels des erfindungsgemäßen Verfahrens ist somit bereits in etwa eine Verdoppelung der Produktivität zu erwarten.The inventive method has the advantage that by extruding and bending several extruded profiles, the productivity in the production of extruded profiles can be increased. Since the extruded profiles are provided with a curvature such that the curvature of an extruded profile to the curvature of another extruded profile is opposite, a simultaneous curvature of the extruded profiles without mutual interference in the bending process is possible. By extruding and bending, for example, two extruded profiles by means of the method according to the invention is thus already expected in about a doubling of productivity.
Bei einer besonders vorteilhaften Ausführungsform des erfindungsgemäßen Verfahrens werden die Strangpressprofile mit einer Krümmung gleicher Größe, jedoch mit einem gegensätzlichen Vorzeichen gekrümmt. Unter "Größe" einer Krümmung sei, wie im herkömmlichen mathematischen Sinne, der Reziprokwert des Radius einer Krümmung gemeint. Eine Krümmung von Strangpressprofilen mit entgegengesetztem Vorzeichen und gleicher Größe bedeutet somit, dass die Strangpressprofile spiegelsymmetrisch gekrümmt werden. Falls die Strangpressprofile weiterhin in ihrer Querschnittsform spiegelsymmetrisch sind können aus den Strangpressprofilen somit vorteilhaft spiegelsymmetrische Werkstücke hergestellt werden, wie etwa linke und rechte Werkstücke, oder vordere und hintere Werkstücke. Im Unterschied zum Stand der Technik, bei dem für gewöhnlich nur Einzelstränge nacheinander stranggepresst werden, wird ein zeit-und damit kostenintensiver Wechsel des Strangpresswerkzeugs zum seriellen Strangpressen von z. B. linken und rechten Profilstücken vermieden. Die Weiterverarbeitung und Lagerhaltung wird zudem vereinfacht, da in der Art links-rechts bzw. vornehinten zusammengehörende Profilstücke unmittelbar gemeinsam hergestellt, weiterverarbeitet und gelagert werden können. Weiterhin wird sichergestellt, dass zusammengehörende Profilstücke aus dem identischen Ausgangsmaterial und unter den gleichen Verfahrensbedingungen hergestellt werden, so dass etwaige Schwankungen in der Materialeigenschaften oder den Prozessbedingungen für zusammengehörende Profilstücke keine Auswirkungen zeigen.In a particularly advantageous embodiment of the method according to the invention, the extruded profiles are curved with a curvature of the same size, but with an opposite sign. By "size" of a curvature is meant, as in the conventional mathematical sense, the reciprocal of the radius of a curvature. A curvature of extruded profiles with opposite signs and the same size thus means that the extruded profiles are curved mirror-symmetrically. If the extruded profiles are still mirror-symmetrical in their cross-sectional shape can thus be produced from the extruded profiles advantageously mirror-symmetrical workpieces, such as left and right workpieces, or front and rear workpieces. In contrast to the prior art, in which usually only single strands are extruded successively, a time-consuming and thus costly change of the extrusion die for serial extrusion of z. B. avoided left and right profile pieces. The further processing and warehousing is also simplified because in the way left-right or front together belonging profile pieces can be directly produced, processed and stored together. Furthermore, it is ensured that mating profile pieces are produced from the identical starting material and under the same process conditions, so that any fluctuations in the material properties or the process conditions for mating profile pieces have no effect.
Bei einer weiteren vorteilhaften Ausführungsform des erfindungsgemäßen Verfahrens ist die Strangpressmatrize so ausgebildet, dass wenigstens zwei übereinanderliegende Strangpressprofile geformt werden. Die wenigstens zwei übereinanderliegenden Strangpressprofile werden anschließend gleichzeitig und mit einer Krümmung gleichen Vorzeichens gekrümmt. Mit anderen Worten, die übereinanderliegenden Strangpressprofile werden ausschließlich positiv oder ausschließlich negativ gekrümmt. Werden beispielsweise insgesamt vier Strangpressprofile von der Strangpressmatrize geformt, so können zwei übereinanderliegende Strangpressprofile eine positive Krümmung aufweisen, während die anderen beiden übereinanderliegenden Strangpressprofile eine negative Krümmung aufweisen. Im Vergleich zu dem herkömmlichen Strangpressen von Einzelsträngen kann somit im wesentlichen eine Vervierfachung der Produktivität erzielt werden.In a further advantageous embodiment of the method according to the invention, the extrusion die is designed so that at least two superimposed extruded profiles are formed. The at least two superimposed extruded profiles are then curved simultaneously and with a curvature of the same sign. In other words, the superimposed extruded profiles are exclusively positively or exclusively negatively curved. For example, if a total of four extruded profiles formed by the extrusion die, so two superimposed extruded profiles can have a positive curvature, while the other two superimposed extruded profiles have a negative curvature. Thus, compared to the conventional extrusion of single strands, a fourfold increase in productivity can be achieved substantially.
Die übereinanderliegenden Strangpressprofile können vorteilhaft nicht nur eine Krümmung gleichen Vorzeichens, sondern auch eine Krümmung gleicher Größe aufweisen. Verfahrenstechnisch bedeutet dies, dass derartige übereinanderliegende Strangpressprofile in der gleichen Weise und insbesondere auch mit einem einzelnen Führungsswerkzeug, welches für die Verarbeitung von mehreren Strangpressprofilen ausgelegt ist, gekrümmt werden können.The superimposed extruded profiles can advantageously not only have a curvature of the same sign, but also a curvature of the same size. In terms of process technology, this means that such superimposed extruded profiles in the same way and in particular with a single guide tool, which for processing designed by several extruded profiles, can be curved.
Bei einer vorteilhaften Ausführungsform des erfindungsgemäßen Verfahrens werden die Strangpressprofile nicht gebogen, sondern gerundet. Beim Runden werden die Strangpressprofile gleichzeitig mit oder unmittelbar nach dem formgebenden Strangpressvorgang durch eine quer zur Strangpressrichtung auf das Profil einwirkende Kraft, welche eine Krümmung des Profils schon beim Austritt aus der Strangpressmatrize bewirkt, gekrümmt. Genauer betrachtet, tritt eine über das Strangpressprofil vermittelte Rückwirkung der einwirkenden Kraft in die formgebende Zone statt, wobei eine Kraftkomponente als Zug-oder Druckkraft eine Krümmung des Strangpressprofils im plastischen Zustand bei dessen Austritt aus der Strangpressmatrize bewirkt. Durch die einwirkende Kraft nimmt der Materialfluss an der Außenseite eines gekrümmten Strangpressprofils zu, während der Materialfluss an der Innenseite des gekrümmten Strangpressprofils abnimmt. Die durch Runden hergestellten, gekrümmten Werkstücke haben Profilquerschnitte, die identisch zu jenen sind, die beim geraden Strangpressen erzeugt werden. Insbesondere ermöglicht das Runden somit auch eine Krümmung komplexer Hohlprofilquerschnitte.In an advantageous embodiment of the method according to the invention, the extruded profiles are not bent, but rounded. During rounding, the extruded profiles are curved simultaneously with or immediately after the shaping extrusion process by a force acting on the profile transversely to the extrusion direction, which already causes a curvature of the profile upon exiting the extrusion die. More specifically, a reaction of the applied force through the extruded profile takes place in the forming zone, wherein a force component as a tensile or compressive force causes a curvature of the extruded profile in the plastic state as it exits the extrusion die. As a result of the acting force, the flow of material on the outside of a curved extruded profile increases while the flow of material on the inside of the curved extruded profile decreases. Rounded curved workpieces have profile cross sections identical to those produced by straight extrusion. In particular, the rounding thus also allows a curvature of complex hollow profile cross sections.
Das Runden von Werkstücken ist in dem
Fernen ist erfindungsgemäß in vorteilhafter Weise möglich, dass die gekrümmten Strangpressprofile von einem einzigen Trennwerkzeug abgelängt werden, wobei das Trennwerkzeug praktischerweise in der Verlängerung der Pressachse der Strangpressvorrichtung angeordnet wird. Bei einer solchen Anordnung des Trennwerkzeugs können beispielsweise zwei austretende Strangpressprofile mit einer Krümmung entgegengesetzten Vorzeichens durch eine bloße Schwenkbewegung des Trennwerkzeugs auf einem Drehsockel abgelängt werden.Distance is according to the invention in an advantageous manner possible that the curved extruded profiles are cut to length by a single cutting tool, the cutting tool is conveniently placed in the extension of the press axis of the extrusion device. In such an arrangement of the cutting tool, for example, two exiting extruded profiles with a curvature of opposite sign can be cut to length by a mere pivotal movement of the separating tool on a rotary base.
Das erfindungsgemäße Verfahren ist zur Erhöhung der Produktivität besonders vorteilhaft beim Strangpressen von Strangpressprofilen aus Magnesium oder dessen Legierungen bzw. schwer pressbaren Aluminiumlegierungen einsetzbar, da sich Strangpressprofile aus diesen Materialien durch eine besonders niedrige Austrittsgeschwindigkeit aus der Strangpressmatrize auszeichnen.The inventive method is particularly advantageous for increasing the productivity of extruded profiles of magnesium or its alloys or difficult to press aluminum alloys, since extruded profiles of these materials are characterized by a particularly low exit velocity from the extrusion die.
Weiterhin ist es bevorzugt, wenn die Strangpressprofile beim Austritt aus der Matrize vor dem Biegen derart abgelenkt werden, dass die Strangaustrittsrichtung schräg nach vorne entgegen der späteren Krümmung eines gekrümmten Werkstücks verläuft. Hierdurch können bei gegebenen Abmessungen eines Pressenauslaufes, insbesondere des Durchmessers des Öffnungskegels des Gegenholms, größere Krümmungsradien erzielt werden. Ein solches Verfahren wird in der internationalen Patentanmeldung
Die Erfindung wird nun anhand eines Ausführungsbeispiels näher erläutert, wobei Bezug auf die beigefügte Zeichnung genommen wird.
- Fig. 1
- zeigt eine perspektivische Ansicht einer Anordnung zum Strangpressen und Runden einer Mehrzahl von Strangpressprofilen gemäß dem Verfahren der Erfindung.
- Fig. 1
- shows a perspective view of an arrangement for extruding and rounding a plurality of extruded profiles according to the method of the invention.
In Fig. 1 ist eine Strangpressvorrichtung 1 mit einem Gegenholm 2 gezeigt. Aus dem Öffnungskegel 3 des Gegenholms 2 treten Strangpressprofile 4, 5 aus einem Leichtmetall bzw. einer Leichtmetalllegierung aus. Das Strangpressprofil 4 wird durch ein auf einer Linearachse 7 geführtes Führungswerkzeug 6 gerundet. Das Strangpressprofil 5 wird durch ein auf einer Linearachse 9 geführtes Führungswerkzeug 8 gerundet. Hierbei wird durch das Führungswerkzeug 6 bzw. 8 auf das Strangpressprofil 5 bzw. 4 eine gleichzeitig mit oder unmittelbar nach dem formgebenden Strangpressvorgang durch eine quer zur Strangpressrichtung auf das Profil einwirkende Kraft ausgeübt, welche eine Krümmung des Profils schon beim Austritt aus der Strangpressmatrize bewirkt. Da eine über das Strangpressprofil vermittelte Rückwirkung der einwirkenden Kraft in die formgebende Zone stattfindet, bewirkt eine Kraftkomponente als Zug- oder Druckkraft eine Krümmung der Strangpressprofile bereits im plastischen Zustand bei deren Austritt aus der Strangpressmatrize.In Fig. 1, an extrusion press 1 is shown with a
Die beiden Strangpressprofile 4, 5 werden hierdurch in einer die Pressrichtung enthaltenden horizontalen Ebene mit einer Krümmung gegensätzlichen Vorzeichens versehen, d. h. das Strangpressprofil 5 ist in Pressenrichtung positiv gekrümmt, während das Strangpressprofil 4 negativ gekrümmt ist.The two extruded profiles 4, 5 are thereby provided in a pressing direction containing the horizontal plane with a curvature opposite sign, d. H. the extruded profile 5 is positively curved in the press direction, while the extruded profile 4 is negatively curved.
Die beiden Strangpressprofile 4, 5 werden durch einen einzigen, eine Trennsäge 10 tragenden, Trennroboter 11 in gewünschter Weise abgelängt. Die Trennsäge 10 kann durch den Schwenkarm, welcher auf dem Drehsockel 12 des Trennroboters 11 drehbar gelagert ist, zwischen den beiden Strangpressprofilen 4, 5 verschwenkt werden. Die Strangpressprofile 4, 5 werden nach Austritt aus der Strangpressvorrichtung 1 auf den Führungsflächen 13, 14 (Auslauftische) geführt. Eine Ablängung der Strangpressprofile 4, 5 erfolgt im Zwischenraum zwischen Strangpressvorrichtung 1 und Führungsflächen 13, 14.The two extruded profiles 4, 5 are cut to length by a single, a dicing saw 10 supporting
Claims (10)
- A method for producing a plurality of curved extruded profiles (4,5) from light metal or a light metal alloy, characterized by the following steps:- simultaneous extrusion of at least two extruded profiles (4,5) that are mirror-symmetrical in cross-sectional shape, by using an extrusion device (1) which comprises an extrusion tool with an extrusion die shaping the at least two extruded profiles,- simultaneous curving of the at least two extruded profiles (4,5), in which, when viewed in the direction of extrusion and in a horizontal viewing plane including the direction of extrusion, at least one of the extruded profiles (4,5) or its projection into the viewing plane is curved with a curvature which has an algebraic sign opposite to that of the curvature with which at least one other extruded profile (4,5) or its projection into the viewing plane is curved.
- The method as claimed in claim 1, characterized in that the extruded profiles (4,5) are curved with a curvature of the same magnitude.
- The method as claimed in claim 1 or 2, characterized in that at least two extruded profiles (4,5) lying one above the other are shaped by the extrusion die and simultaneously curved with curvature of the same algebraic sign.
- The method as claimed in claim 3, characterized in that the at least two extruded profiles (4,5) lying one above the other are curved with a curvature of the same magnitude.
- The method as claimed in claim 4, characterized in that the at least two extruded profiles (4,5) lying one above the other are curved with a single curving tool.
- The method as claimed in one of the preceding claims, characterized in that the extruded profiles (4,5) are rounded with or immediately after the cross-sectional shaping extrusion operation by a force acting on the extruded profiles transversely in relation to the direction of extrusion, a force component acting as a tensile or compressive force in the cross-sectional shaping extrusion operation having the effect of curving the extruded profiles as they leave the extrusion die.
- The method as claimed in one of the preceding claims, characterized in that the curved extruded profiles (4,5) are cut to length by a single parting tool (10).
- The method as claimed in claim 7, characterized in that the parting tool (10) is arranged in line with an extension of the axis of extrusion of the extrusion device (1).
- The method as claimed in one of the preceding claims, characterized in that extruded profiles (4,5) consisting of magnesium or a magnesium alloy or of aluminum alloys that are difficult to extrude are extruded.
- The method as claimed in one of the preceding claims, characterized in that, when they leave the die, the extruded profiles (4,5) are deflected before bending in such a way that the strand discharge direction extends forward at an angle counter to the later curvature of a curved workpiece.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10329696A DE10329696B3 (en) | 2003-07-02 | 2003-07-02 | Method for producing a plurality of curved extruded profiles |
| PCT/EP2004/007126 WO2005002752A1 (en) | 2003-07-02 | 2004-06-30 | Method for producing a plurality of bent extruded profiles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1644137A1 EP1644137A1 (en) | 2006-04-12 |
| EP1644137B1 true EP1644137B1 (en) | 2007-08-08 |
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ID=33559790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04740499A Expired - Lifetime EP1644137B1 (en) | 2003-07-02 | 2004-06-30 | Method for producing a plurality of bent extruded profiles |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7197907B2 (en) |
| EP (1) | EP1644137B1 (en) |
| CN (1) | CN100368105C (en) |
| AT (1) | ATE369214T1 (en) |
| DE (2) | DE10329696B3 (en) |
| NO (1) | NO20060549L (en) |
| WO (1) | WO2005002752A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10236299A1 (en) * | 2002-08-08 | 2004-02-19 | Sms Eumuco Gmbh | Extrusion press esp. for fabrication of curved products has two-part tool located in counter part for simpler bending |
| US9637175B2 (en) * | 2015-08-13 | 2017-05-02 | Ford Global Technologies, Llc | Extruded vehicle body component |
| GB2580955B (en) * | 2019-01-31 | 2021-03-10 | Imperial College Innovations Ltd | Apparatus and method for extruding curved profiles |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2189415A (en) * | 1937-10-02 | 1940-02-06 | Nassau Smelting And Refining C | Material treating apparatus |
| DE2434299A1 (en) * | 1974-07-17 | 1976-02-05 | Aluminium Walzwerke Singen | METHOD AND DEVICE FOR PRODUCING PROFILES O.DGL. IN PARTICULAR MADE OF LIGHT ALLOY |
| US3964283A (en) * | 1974-11-13 | 1976-06-22 | Western Electric Company, Inc. | Production of multiple elongated products such as wire |
| CA1048442A (en) * | 1975-12-08 | 1979-02-13 | Western Electric Company, Incorporated | Apparatus and methods for forming a plurality of elongated products |
| NL9200138A (en) * | 1992-01-24 | 1993-08-16 | Reynolds Aluminium Bv | EXTRUSION METHOD AND EXTRUSION DEVICE. |
| JP3022036B2 (en) * | 1992-02-24 | 2000-03-15 | テイエチケー株式会社 | Rail manufacturing method and manufacturing apparatus |
| GB9218024D0 (en) | 1992-08-25 | 1992-10-14 | Cook Michael W | Improvements in and relating to dies for extruding aluminium |
| DE4428827A1 (en) * | 1994-08-17 | 1996-03-14 | Kleiner Matthias Prof Dr Ing H | Process for the production of curved workpieces by a combination of extrusion and bending |
| DK1169146T3 (en) * | 2000-02-10 | 2004-06-01 | Wkw Erbsloeh Automotive Gmbh | Method and apparatus for producing curved extruded profiles |
| DE10141328B4 (en) * | 2001-08-28 | 2005-04-14 | Sms Eumuco Gmbh | Method and device for extrusion molding of curved extruded profiles |
-
2003
- 2003-07-02 DE DE10329696A patent/DE10329696B3/en not_active Expired - Fee Related
-
2004
- 2004-06-30 AT AT04740499T patent/ATE369214T1/en not_active IP Right Cessation
- 2004-06-30 DE DE502004004593T patent/DE502004004593D1/en not_active Expired - Fee Related
- 2004-06-30 CN CNB2004800186448A patent/CN100368105C/en not_active Expired - Fee Related
- 2004-06-30 WO PCT/EP2004/007126 patent/WO2005002752A1/en not_active Ceased
- 2004-06-30 EP EP04740499A patent/EP1644137B1/en not_active Expired - Lifetime
-
2005
- 2005-12-29 US US11/322,169 patent/US7197907B2/en not_active Expired - Fee Related
-
2006
- 2006-02-02 NO NO20060549A patent/NO20060549L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DE10329696B3 (en) | 2005-03-03 |
| CN1859987A (en) | 2006-11-08 |
| CN100368105C (en) | 2008-02-13 |
| EP1644137A1 (en) | 2006-04-12 |
| NO20060549L (en) | 2006-02-02 |
| DE502004004593D1 (en) | 2007-09-20 |
| WO2005002752A1 (en) | 2005-01-13 |
| US7197907B2 (en) | 2007-04-03 |
| ATE369214T1 (en) | 2007-08-15 |
| US20060156780A1 (en) | 2006-07-20 |
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