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EP2635388A1 - Method for the roll-forming of profiles and a structural part produced thereby - Google Patents

Method for the roll-forming of profiles and a structural part produced thereby

Info

Publication number
EP2635388A1
EP2635388A1 EP11794399.3A EP11794399A EP2635388A1 EP 2635388 A1 EP2635388 A1 EP 2635388A1 EP 11794399 A EP11794399 A EP 11794399A EP 2635388 A1 EP2635388 A1 EP 2635388A1
Authority
EP
European Patent Office
Prior art keywords
component
forming
semifinished product
roll forming
roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11794399.3A
Other languages
German (de)
French (fr)
Inventor
Bernd Gross
Hans-Georg Werner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Adient Luxembourg Holding SARL
Original Assignee
Johnson Controls GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johnson Controls GmbH filed Critical Johnson Controls GmbH
Publication of EP2635388A1 publication Critical patent/EP2635388A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/008—Bending sheet metal along straight lines, e.g. to form simple curves combined with heating or cooling of the bends
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/1241—Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]

Definitions

  • the invention relates to a method for roll forming of profiles or structural parts from flat semi-finished products, in particular of metallic materials, in particular of sheet steel or aluminum. Furthermore, the invention relates to a preferably manufactured using this method component, in particular a structural part for a seat structure of a motor vehicle and a roll forming device for performing the method.
  • CONFIRMATION COPY The invention is therefore based on the object to improve the formability of a semi-finished product in the areas to be reshaped by roll forming and to minimize the springback behavior of a finished component.
  • the flat semifinished product is tempered for the roll forming process, wherein the tempering takes place locally, in particular in forming regions of the semifinished product to be formed.
  • the tempering may be heating and / or cooling and preferably takes place before or during the forming of the semifinished product.
  • Profiles or structural parts machined with the method then have a higher load-bearing capacity than those which have not been tempered.
  • roll forming takes place in a predetermined forming sequence.
  • the forming sequence designates in which order the forming regions are processed, that is to say shaped, whereby the forming sequence results from the profile or structural part to be produced and its radius regions.
  • Each profile produced by roll forming thus has a certain forming sequence in the roll forming process.
  • the forming areas are tempered successively in the forming sequence of the roll forming process.
  • the local heating is preferably carried out on strip-shaped deformation regions of the semifinished product, which are aligned in roll forming direction, so that the deformation regions stressed and deformed during the roll forming process are tempered, in particular heated, during molding or processing.
  • the method is advantageously either heated inductively or there is an energy input by laser irradiation. Both process designs offer the possibility of selectively heating the semifinished product to be processed selectively in the transformation regions.
  • the laser irradiation takes place in a preferred embodiment with a fiber laser.
  • the semifinished product can be cured after forming, d. H. with a coolant, for example, an oil bath or the like quenched.
  • a coolant for example, an oil bath or the like quenched.
  • Forming or radius areas These locally heated deformation or radius regions can have been heated both before, during and after the rolling or forming.
  • the invention provides that the deformation region was subjected to a material properties changing temperature control and a conditional by the temperature Structure change has.
  • the deformation ranges thus differ in their material structure from the flat sections and also by other, non-tempered, processed by roll forming components, but have at least the same or higher strengths as these.
  • the component is made of a high-strength steel or high-strength aluminum whose strength is higher than would otherwise typically be processed in rollforming or roll forming processes, in particular 1000 MPa or more or even 1200 MPa or more, especially for components made of steel.
  • the component produced according to the invention may then preferably have wall thicknesses of 1, 5 mm or even 1, 4 mm or 1, 3 mm or less in each case.
  • components or profiles are mainly provided as a structural structural parts, wherein the component is in a preferred embodiment, a vehicle seat rail, which can be adjusted for seat adjustment to the front and rear.
  • a suitable rollforming device for carrying out the method the patented object is achieved in that various means for tempering a semi-finished product to be formed are provided.
  • inductive heating devices and / or lasers, in particular fiber lasers are provided for heating.
  • Peltier elements can be used for cooling.
  • the respective means for tempering can advantageously be exchanged with roller sets of the roll forming device, so that arrangements optimized for different applications are ensured and various components can be manufactured on a roll forming device.
  • the roll forming method used in this invention is also known as roll forming and described, for example, in DIN 8586, the contents of which are hereby incorporated by reference.
  • FIG. 1 shows a basic cross-section of a roll produced by roll forming.
  • FIG. 2 shows a development of the cross section of the component from FIG. 1.
  • the component 1 shown in FIG. 1 is profiled and is typically produced by roll forming.
  • This component 1 has a plurality of planar sections 3, which have essentially emerged unchanged from a flat semifinished product.
  • the sheet-like sections 3 are connected to one another by means of cross-hatched forming regions 4a, 4b, 4c, 4d, which are deformed during roll-forming, in radius regions of the component 1.
  • These deformation regions 4a, 4b, 4c, 4d represent in particular in the
  • FIG. 2 shows a basic development 2 of the cross section of the component 1.
  • the transformation regions 4a, 4b, 4c, 4d are hatched as in FIG. 1 and delimited by corresponding lines and extend in each case in the roll forming direction.
  • These deformation regions 4a, 4b, 4c, 4d are tempered, ie heated or cooled, during the passage through a roll forming device or during roll forming.
  • the material properties can be adapted in accordance with the requirements, so that the component 1 has a structural change in the transformation or radius regions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Heat Treatment Of Articles (AREA)
  • General Induction Heating (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

The invention relates to a method for the roll-forming of profiles or structural parts from semifinished sheet-like products, in particular from metallic materials, in particular from steel sheet or aluminium. For this, the semifinished sheet-like product is adjusted in its temperature, the adjustment of the temperature taking place locally, in particular in forming regions of the semifinished product that are intended to undergo a forming operation. Furthermore, the invention relates to a component preferably produced by using this method, in particular a structural part for a seat structure of a motor vehicle, in particular a vehicle seat rail that can be adjusted forwards and backwards to adjust the seat, and to a roll-forming device for carrying out the method.

Description

Verfahren zum Rollformen von Profilen und dadurch hergestelltes Strukturteil  Method for roll forming profiles and structural part produced thereby
Die Erfindung betrifft ein Verfahren zum Rollformen von Profilen beziehungsweise Strukturteilen aus flächigen Halbzeugen, insbesondere aus metallischen Werkstoffen, insbesondere aus Stahlblech oder Aluminium. Weiterhin betrifft die Erfindung ein vorzugsweise unter Anwendung dieses Verfahrens gefertigtes Bauteil, insbesondere ein Strukturteil für eine Sitzstruktur eines Kraftfahrzeugs und eine Rollformeinrichtung zur Durchführung des Verfahrens. The invention relates to a method for roll forming of profiles or structural parts from flat semi-finished products, in particular of metallic materials, in particular of sheet steel or aluminum. Furthermore, the invention relates to a preferably manufactured using this method component, in particular a structural part for a seat structure of a motor vehicle and a roll forming device for performing the method.
Für derartige Profile beziehungsweise Strukturteile sind bestimmte Festigkeiten des verwendeten Materials erforderlich, damit die zumeist tragenden Bauteile ein ausreichendes Lastaufnahmevermögen aufweisen. Gleichzeitig wird jedoch ein möglichst geringer Materialeinsatz gefordert, um zum Beispiel eine günstige Kostenstruktur bei der Herstellung zu erreichen. Mit den bekannten Rollformprozessen sind weitere Materialeinsparungen jedoch kaum zu realisieren, da sich härtere Materialien, insbesondere hochfeste Materialien, nur bedingt Rollformen lassen und es bei geringeren Wanddicken des Materials verstärkt zu einer Rückfederung während der Herstellung oder direkt im Anschluss an die Herstellung kommt. Häufig werden daher hochfeste Stähle mit Zugfestigkeiten von bis zu 800 MPa und einer Wanddicke von mindestens 1 ,6 mm für die Herstellung eingesetzt. Halbzeuge mit geringeren Wanddicken und/oder größeren Zugfestigkeiten sind bisher zumindest bei Strukturteilen für Sitzstrukturen von Kraftfahrzeugen, insbesondere Fahrzeugsitzschienen nicht möglich. For such profiles or structural parts certain strengths of the material used are required so that the mostly supporting components have sufficient load capacity. At the same time, however, the lowest possible use of material is required in order to achieve, for example, a favorable cost structure in the production. With the known Rollformprozessen more material savings, however, are difficult to realize, since harder materials, especially high-strength materials, can only roll form and it comes with lower wall thicknesses of the material reinforced to a springback during manufacture or directly after the production. Often therefore high-strength steels with tensile strengths of up to 800 MPa and a wall thickness of at least 1, 6 mm are used for the production. Semi-finished products with smaller wall thicknesses and / or greater tensile strengths have hitherto not been possible, at least for structural parts for seat structures of motor vehicles, in particular vehicle seat rails.
BESTÄTIGUNGSKOPIE Der Erfindung liegt daher die Aufgabe zugrunde, die Umformbarkeit eines Halbzeugs in den durch Rollformen umzuformenden Bereichen zu verbessern und das Rückfederungsverhalten eines fertigen Bauteils zu minimieren. CONFIRMATION COPY The invention is therefore based on the object to improve the formability of a semi-finished product in the areas to be reshaped by roll forming and to minimize the springback behavior of a finished component.
Die Lösung der Aufgabe erfolgt verfahrensmäßig mit den Merkmalen des Anspruchs 1. Ein mit dem Verfahren hergestelltes Bauteil ist mit den Merkmalen des Anspruchs 8 und eine Rollformeinrichtung zur Durchführung des Verfahrens ist mit den Merkmalen des Anspruchs 12 definiert. Weiterbildungen und vorteilhafte Ausgestaltungen sind in den jeweiligen Unteransprüchen angegeben. The solution of the problem is procedurally with the features of claim 1. A produced by the method component is with the features of claim 8 and a roll forming device for performing the method is defined by the features of claim 12. Further developments and advantageous embodiments are specified in the respective subclaims.
Bei einem derartigen Verfahren ist erfindungsgemäß vorgesehen, dass das flächige Halbzeug für den Rollformprozess temperiert wird, wobei das Temperieren lokal, insbesondere in umzuformenden Umformungsbereichen des Halbzeugs erfolgt. Das Temperieren kann ein Erwärmen und/oder ein Kühlen sein und erfolgt vorzugsweise vor oder während des Umformens des Halbzeugs. Mit dem Verfahren bearbeitete Profile oder Strukturteile weisen dann ein höheres Lastaufnahmevermögen auf als solche, die nicht temperiert wurden. In such a method, it is provided according to the invention that the flat semifinished product is tempered for the roll forming process, wherein the tempering takes place locally, in particular in forming regions of the semifinished product to be formed. The tempering may be heating and / or cooling and preferably takes place before or during the forming of the semifinished product. Profiles or structural parts machined with the method then have a higher load-bearing capacity than those which have not been tempered.
In Abhängigkeit von der Form des zu erzeugenden Profils oder Bauteils erfolgt das Rollformen in einer vorbestimmten Umformabfolge. Die Umformabfolge bezeichnet dabei, in welcher Reihenfolge die Umformungsbereiche bearbeitet, das heißt geformt, werden, wobei sich die Umformabfolge aus dem herzustellenden Profil beziehungsweise Strukturteil und dessen Radienbereichen ergibt. Jedes durch Rollformen hergestellte Profil weist damit eine bestimmte Umformabfolge beim Rollformprozess auf. Um eine zeitnahe, möglichst unmittelbare Verknüpfung von Roll- beziehungsweise Umformen und Temperieren zu erreichen, ist vorgesehen, dass die Umformungsbereiche nacheinander in der Umformabfolge des Rollformprozesses temperiert werden. Damit kann einerseits der Energieeinsatz für das Verfahren reduziert werden und andererseits die Belastung des umzuformenden Halbzeugs beziehungsweise des fertigen Bauteils bei der Herstellung reduziert werden. Depending on the shape of the profile or component to be produced, roll forming takes place in a predetermined forming sequence. In this case, the forming sequence designates in which order the forming regions are processed, that is to say shaped, whereby the forming sequence results from the profile or structural part to be produced and its radius regions. Each profile produced by roll forming thus has a certain forming sequence in the roll forming process. In order to achieve a timely, as direct as possible combination of rolling or forming and tempering, it is provided that the forming areas are tempered successively in the forming sequence of the roll forming process. Thus, on the one hand, the energy input for the process can be reduced and, on the other hand, the Load of the semifinished product to be formed or the finished component to be reduced during manufacture.
Die lokale Erwärmung erfolgt dabei vorzugsweise auf streifenförmigen Um- formungsbereichen c|es Halbzeugs, die in Rollformrichtung ausgerichtet sind, so dass die beim · Rollformprozess beanspruchten und verformten Umformungsbereiche beim Formen beziehungsweise Bearbeiten temperiert, insbesondere erwärmt sind. Je nach Ausführung beziehungsweise Ausgestaltung des Verfahrens wird vorteilhafterweise entweder induktiv erwärmt oder es erfolgt ein Energieeintrag mittels Laserbestrahlung. Beide Verfahrensausgestaltungen bieten die Möglichkeit das zu bearbeitende Halbzeug punktuell und somit gezielt in den Umformungsbereichen zu erwärmen. Die Laserbestrahlung erfolgt in einer bevorzugten Ausgestaltung mit einem Fiber-Laser. In this case, the local heating is preferably carried out on strip-shaped deformation regions of the semifinished product, which are aligned in roll forming direction, so that the deformation regions stressed and deformed during the roll forming process are tempered, in particular heated, during molding or processing. Depending on the design or configuration of the method is advantageously either heated inductively or there is an energy input by laser irradiation. Both process designs offer the possibility of selectively heating the semifinished product to be processed selectively in the transformation regions. The laser irradiation takes place in a preferred embodiment with a fiber laser.
Auch kann das Halbzeug nach dem Umformen gehärtet werden, d. h. mit einem Kühlmittel, zum Beispiel einem Ölbad oder dergleichen, abgeschreckt werden. Ein derart hergestelltes Bauteil kann eine nochmals höhere und damit verbesserte Festigkeit aufweisen, insbesondere in vorher lokal erwärmtenAlso, the semifinished product can be cured after forming, d. H. with a coolant, for example, an oil bath or the like quenched. A component produced in this way can have a further higher and thus improved strength, in particular in previously locally heated
Umformungs- beziehungsweise Radienbereichen. Diese lokal erwärmten Umformungs- beziehungsweise Radienbereiche können dabei sowohl vor, während als auch nach dem Roll- beziehungsweise Umformen erwärmt worden sein. Forming or radius areas. These locally heated deformation or radius regions can have been heated both before, during and after the rolling or forming.
Zudem ergibt sich damit eine weitere Anwendungsmöglichkeit des Verfahrens, die darin besteht, dass das herzustellende Bau- beziehungsweise Strukturteil aus dem sonst üblicherweise eingesetzten weicheren Material und damit in der Regel günstigerem Material, insbesondere einem etwas weicheren Stahl, herstellbar ist, der durch anschließendes Abschrecken gehärtet wird. Auch kann das lokale Temperieren, insbesondere das lokale Erwärmen, in Kombination mit dem Abschrecken beziehungsweise Härten im Anschluss an das Rollformen erfolgen. Damit kann dann beispielsweise das Lastaufnahmevermögen von weicheren, leichter umzuformenden Materialien, wie z. B. Bor-Mangan-Stahl, erhöht werden, so dass auch aus diesen Materialien gefertigte Profile weiter optimiert werden können. rIn addition, this results in a further application of the method, which consists in that the structural or structural part to be produced from the otherwise usually used softer material and thus usually more favorable material, in particular a slightly softer steel, can be produced, which cured by subsequent quenching becomes. Also, the local tempering, in particular the local heating, in combination with the quenching or hardening in Following the roll forming done. Thus, for example, the load-bearing capacity of softer, easier to reshape materials such. As boron-manganese steel, can be increased, so that also made of these materials profiles can be further optimized. r
Bei einem Bauteil, insbesondere einem Strukturteil für eine Sitzstruktur eines Kraftfahrzeugs mit zueinander abgewinkelten flächigen Abschnitten, die über wenigstens einen als Radienbereich ausgebildeten Umformungsbereich miteinander verbunden sind, ist erfindungsgemäß vorgesehen, dass der Umformungsbereich einem die Materialeigenschaften verändernden Temperierungsvorgang unterworfen war und eine durch die Temperierung bedingte Gefügeveränderung aufweist. Die Umformungsbereiche unterscheiden sich damit in ihrer Materialstruktur von den flächigen Abschnitten und auch von anderen, nicht temperierten, mittels Rollformen bearbeiteten Bauteilen, weisen jedoch wenigstens die gleichen oder höhere Festigkeiten wie diese auf. In a component, in particular a structural part for a seat structure of a motor vehicle with mutually angled planar sections, which are connected to each other via at least one formed as a radius region forming region, the invention provides that the deformation region was subjected to a material properties changing temperature control and a conditional by the temperature Structure change has. The deformation ranges thus differ in their material structure from the flat sections and also by other, non-tempered, processed by roll forming components, but have at least the same or higher strengths as these.
Insbesondere ist das Bauteil aus einem hochfesten Stahl oder aus hochfestem Aluminium hergestellt, dessen Festigkeit höher ist, als dies sonst typischerweise bei Rollformverfahren beziehungsweise Rollformprozessen bearbeitet werden könnte, insbesondere 1000 MPa oder mehr oder auch 1200 MPa oder mehr, insbesondere für aus Stahl gefertigte Bauteile. Das erfindungsgemäß hergestellte Bauteil kann dann bevorzugt Wanddicken von 1 ,5 mm oder sogar 1 ,4 mm oder 1 ,3 mm oder jeweils weniger aufweisen. In particular, the component is made of a high-strength steel or high-strength aluminum whose strength is higher than would otherwise typically be processed in rollforming or roll forming processes, in particular 1000 MPa or more or even 1200 MPa or more, especially for components made of steel. The component produced according to the invention may then preferably have wall thicknesses of 1, 5 mm or even 1, 4 mm or 1, 3 mm or less in each case.
Derartige, mit dem beschriebenen Verfahren hergestellte, Bauteile beziehungsweise Profile werden vor allem als tragende Strukturteile vorgesehen, wobei das Bauteil in einer bevorzugten Ausgestaltung eine Fahrzeugsitzschiene ist, welche zur Sitzverstellung nach vorne und hinten verstellt werden kann. Bei einer zur Durchführung des Verfahrens geeigneten Rollformeinrichtung wird die patentgemäße Aufgabe dadurch gelöst, dass verschiedene Mittel zum Temperieren eines umzuformenden Halbzeugs vorgesehen sind. Insbesondere sind zum Erwärmen induktive Erwärmungseinrichtungen und/oder Laser, insbesondere Fiber-Laser, vorgesehen. Zur Kühlung können beispielsweise Peltier-Elemente eingesetzt werden. Die jeweiligen Mittel zum Temperieren können dabei vorteilhafterweise mit Rollensätzen der Rollformeinrichtung ausgetauscht werden, so dass für verschiedene Anwendungen optimierte Anordnungen gewährleistet werden und auf einer Rollformein- richtung verschiedene Bauteile fertigbar sind. Such, produced by the described method, components or profiles are mainly provided as a structural structural parts, wherein the component is in a preferred embodiment, a vehicle seat rail, which can be adjusted for seat adjustment to the front and rear. In a suitable rollforming device for carrying out the method, the patented object is achieved in that various means for tempering a semi-finished product to be formed are provided. In particular, inductive heating devices and / or lasers, in particular fiber lasers, are provided for heating. For example, Peltier elements can be used for cooling. The respective means for tempering can advantageously be exchanged with roller sets of the roll forming device, so that arrangements optimized for different applications are ensured and various components can be manufactured on a roll forming device.
Das in dieser Erfindung verwendete Rollformverfahren ist auch als Walzprofilieren bekannt und beispielsweise in der DIN 8586 beschrieben, deren Inhalt durch Verweis darauf hiermit zum Gegenstand dieser Anmeldung gemacht wird. The roll forming method used in this invention is also known as roll forming and described, for example, in DIN 8586, the contents of which are hereby incorporated by reference.
In den Figuren wird die Erfindung anhand eines bevorzugten Ausführungsbeispiels weiter erläutert. Es zeigen: Fig. 1 : ein prinzipieller Querschnitt eines mittels Rollformen hergestelltenIn the figures, the invention will be further explained with reference to a preferred embodiment. FIG. 1 shows a basic cross-section of a roll produced by roll forming. FIG
Bauteils; und component; and
Fig. 2: eine Abwicklung des Querschnitts des Bauteils aus Fig. 1.  2 shows a development of the cross section of the component from FIG. 1.
Das in Figur 1 dargestellte Bauteil 1 ist profiliert und wird typischerweise durch Rollformen hergestellt. Dieses Bauteil 1 weist mehrere flächige Abschnitte 3 auf, die im Wesentlichen unverändert aus einem flächigen Halbzeug hervorgegangen sind. Die flächigen Abschnitte 3 sind über schraffiert dargestellte Umformungsbereiche 4a, 4b, 4c, 4d, welche während des Rollformens verformt werden, in Radienbereichen des Bauteils 1 miteinander verbunden. Diese Umformungsbereiche 4a, 4b, 4c, 4d stellen insbesondere bei derThe component 1 shown in FIG. 1 is profiled and is typically produced by roll forming. This component 1 has a plurality of planar sections 3, which have essentially emerged unchanged from a flat semifinished product. The sheet-like sections 3 are connected to one another by means of cross-hatched forming regions 4a, 4b, 4c, 4d, which are deformed during roll-forming, in radius regions of the component 1. These deformation regions 4a, 4b, 4c, 4d represent in particular in the
Umformung von hochfesten Stählen, mit insbesondere Rm>800 MPa, große Probleme hinsichtlich der Umformbarkeit dar, vor allem bei der Formung enger Radien. Forming of high-strength steels, with in particular Rm> 800 MPa, large Problems with formability, especially when forming narrow radii.
Figur 2 zeigt eine prinzipielle Abwicklung 2 des Querschnitts des Bauteils 1. Die Umformungsbereiche 4a, 4b, 4c, 4d sind wie in Figur 1 schraffiert dargestellt sowie durch entsprechende Linien begrenzt und verlaufen jeweils in Rollformrichtung. Diese Umformungsbereiche 4a, 4b, 4c, 4d sind während des Durchlaufs durch eine Rollformeinrichtung bzw. während des Rollformens temperiert, also erhitzt oder gekühlt. Durch das lokale Erhitzen bzw. Kühlen können die Materialeigenschaften entsprechend den Erfordernissen ange- passt werden, so dass das Bauteil 1 in den Umformungs- beziehungsweise Radienbereichen eine Gefügeveränderung aufweist. FIG. 2 shows a basic development 2 of the cross section of the component 1. The transformation regions 4a, 4b, 4c, 4d are hatched as in FIG. 1 and delimited by corresponding lines and extend in each case in the roll forming direction. These deformation regions 4a, 4b, 4c, 4d are tempered, ie heated or cooled, during the passage through a roll forming device or during roll forming. As a result of the local heating or cooling, the material properties can be adapted in accordance with the requirements, so that the component 1 has a structural change in the transformation or radius regions.

Claims

Patentansprüche Verfahren zum Rollformen von Profilen beziehungsweise Strukturteilen aus flächigen Halbzeugen, insbesondere aus metallischen Werkstoffen, insbe- sondere aus Stahlblech oder Aluminium, Method for roll forming profiles or structural parts from flat semi-finished products, in particular from metallic materials, in particular from sheet steel or aluminum,
d a d u r c h g e k e n n z e i c h n e t,  characterized,
dass das flächige Halbzeug für den Rollformprozess temperiert wird, wobei das Temperieren lokal, insbesondere in umzuformenden Umformungsbereichen (4a, 4b, 4c, 4d) des Halbzeugs erfolgt.  the flat semifinished product is tempered for the roll forming process, wherein the tempering takes place locally, in particular in forming regions (4a, 4b, 4c, 4d) of the semifinished product to be formed.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass das Temperieren vor oder während des Umformens des Halbzeugs erfolgt. 2. The method according to claim 1, characterized in that the tempering takes place before or during the forming of the semifinished product.
3_, Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Umformungsbereiche (4a, 4b, 4c, 4d) nacheinander in Umformabfolge des3_, Method according to one of claims 1 or 2, characterized in that the deformation regions (4a, 4b, 4c, 4d) successively in Umformabfolge of
Rollformprozesses temperiert werden. Rollformprozesses be tempered.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass streifenförmige Umformungsbereiche (4a, 4b, 4c, 4d) des Halbzeugs erwärmt werden, die in Rollformrichtung ausgerichtet sind. i Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass induktiv erwärmt wird. 6. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass mittels Laserbestrahlung erwärmt wird. 4. The method according to any one of claims 1 to 3, characterized in that strip-shaped deformation regions (4a, 4b, 4c, 4d) of the semifinished product are heated, which are aligned in Rollformrichtung. i Method according to one of claims 1 to 4, characterized in that inductively heated. 6. The method according to any one of claims 1 to 4, characterized in that is heated by means of laser irradiation.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Halbzeug nach dem Umformen gehärtet wird. 7. The method according to any one of claims 1 to 6, characterized in that the semifinished product is cured after forming.
8. Bauteil, insbesondere ein Profil oder ein Strukturteil für eine Sitzstruktur eines Kraftfahrzeugs mit zueinander abgewinkelten, flächigen Abschnitten (3), die über wenigstens einen als Radienbereich ausgebildeten Umformungsbereich (4a, 4b, 4c, 4d) miteinander verbunden sind, 8. component, in particular a profile or a structural part for a seat structure of a motor vehicle with mutually angled, flat sections (3), the are connected to one another via at least one deformation region (4a, 4b, 4c, 4d) designed as a radius region,
dadurch gekennzeichnet,  characterized,
dass der Umformungsbereich (4a, 4b, 4c, 4d) einem die Materialeigen- schatten verändernden Temperierungsvorgang unterworfen war und eine durch die Temperierung bedingte Gefügeveränderung aufweist.  the transformation region (4a, 4b, 4c, 4d) was subjected to a tempering process which changed the material properties and has a microstructural change due to the temperature control.
9. Bauteil nach Anspruch 8, dadurch gekennzeichnet, dass das Bauteil (1) aus einem hochfesten Stahl oder aus hochfestem Aluminium hergestellt ist. 9. Component according to claim 8, characterized in that the component (1) is made of a high-strength steel or high-strength aluminum.
10. Bauteil nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass das Bauteil (1) Wanddicken von höchstens 1,5 mm und eine Festigkeit von 1000 MPa oder mehr aufweist. 1 Bauteil nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass das Bauteil (1) eine Fahrzeugsitzschiene ist, welche zur Sitzverstellung nach vorne und hinten verstellt werden kann. 10. Component according to one of claims 8 or 9, characterized in that the component (1) has wall thicknesses of at most 1.5 mm and a strength of 1000 MPa or more. 1 component according to one of claims 8 to 10, characterized in that the component (1) is a vehicle seat rail, which can be adjusted for seat adjustment forward and backward.
12. Rollformeinrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 7, 12. Rollformeinrichtung for carrying out the method according to any one of claims 1 to 7,
dadurch gekennzeichnet,  characterized,
dass verschiedene Mittel zum Temperieren eines umzuformenden Halbzeugs vorgesehen sind. 13. Rollformeinrichtung nach Anspruch 12, dadurch gekennzeichnet, dass die Rollformeinrichtung induktive Erwärmungseinrichtungen und/oder Laser aufweist.  that various means are provided for tempering a semifinished product to be formed. 13. roll forming device according to claim 12, characterized in that the roll forming device has inductive heating means and / or laser.
14. Rollformeinrichtung nach einem der Ansprüche 12 oder 13, dadurch gekennzeichnet, dass diese Peltier-Elemente aufweist. 14. Rollformeinrichtung according to any one of claims 12 or 13, characterized in that it comprises Peltier elements.
EP11794399.3A 2010-11-03 2011-11-03 Method for the roll-forming of profiles and a structural part produced thereby Withdrawn EP2635388A1 (en)

Applications Claiming Priority (2)

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DE102010050400 2010-11-03
PCT/EP2011/005553 WO2012059233A1 (en) 2010-11-03 2011-11-03 Method for the roll-forming of profiles and a structural part produced thereby

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EP (1) EP2635388A1 (en)
JP (1) JP5883879B2 (en)
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CN103189153B (en) 2016-06-08
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JP5883879B2 (en) 2016-03-15
US20130316187A1 (en) 2013-11-28
JP2013544190A (en) 2013-12-12
KR20130112902A (en) 2013-10-14

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