EP1534443B1 - Procede de fabrication de composants structurels a partir d'un profile extrude - Google Patents

Procede de fabrication de composants structurels a partir d'un profile extrude Download PDF

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Publication number
EP1534443B1
EP1534443B1 EP03702561A EP03702561A EP1534443B1 EP 1534443 B1 EP1534443 B1 EP 1534443B1 EP 03702561 A EP03702561 A EP 03702561A EP 03702561 A EP03702561 A EP 03702561A EP 1534443 B1 EP1534443 B1 EP 1534443B1
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EP
European Patent Office
Prior art keywords
hot
structural components
robots
separating
extruded section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03702561A
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German (de)
English (en)
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EP1534443A1 (fr
Inventor
Karl-Heinz Lindner
Alf Birkenstock
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.)
WKW AG
Original Assignee
Erbsloeh AG
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Filing date
Publication date
Application filed by Erbsloeh AG filed Critical Erbsloeh AG
Publication of EP1534443A1 publication Critical patent/EP1534443A1/fr
Application granted granted Critical
Publication of EP1534443B1 publication Critical patent/EP1534443B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, 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, bars, tubes
    • B21C23/12—Extruding bent tubes or rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
    • B21C35/02—Removing or drawing-off work
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49616—Structural member making
    • Y10T29/49622—Vehicular structural member making

Definitions

  • the invention relates to a method for the production of structural components from an extruded profile, in particular consisting of aluminum (A1), magnesium (Mg), or their alloys, which after emerging from the die of the extruder for the purpose of its formation as a straight or arcuate or rounded Profile is guided by one or more guide tools, after which an end portion is separated with a cutting tool and fed to one or more other processing stations in succession.
  • A1 aluminum
  • Mg magnesium
  • a particular advantage of the method according to the invention is that it offers the possibility of accepting lower accuracy requirements with regard to the contour of the extruded profile, since the hot forming step can be used simultaneously for calibrating in order to obtain the exact shape of the finished structural component.
  • An additional advantage of the method according to the invention is that by including the Process step of the hot forming an increase in the value added is made possible by the fact that in the same process step further design features of the final product can be realized as the introduction of holes, the production of small formations or the like.
  • the extrusion rate can be increased, making a more economical use of the associated in their purchase at high cost extrusion line is possible.
  • Al and Mg semi-finished parts are joined together by means of friction stir welding to form new structural components. This can conveniently be done in a welding and machining center, which is followed by the subsequent to the hot forming process hot curing.
  • a possible embodiment of the forming process is that the extruded profiles in an hydroforming step (hydroforming) are further processed.
  • the associated high tool costs often speak against the use of the desirable because of its accuracy in itself IHU process.
  • the hydroforming is, as usual, always designed as cold forming;
  • Mg components are advantageously a hot forming process. In this way, the formation of an unfavorable hexagonal metal lattice structure is avoided for the first time.
  • the hot forming process also comprises a calibration step which, for example, follows the forging.
  • the processing temperature is set by cooling the workpiece to the optimum temperature for the respective alloy of the workpiece to be produced.
  • this advantageously means the setting of a hot working temperature of 180 ° C to 400 ° C, preferably 225 ° to 280 ° C.
  • a suitable temperature for hot forming after extrusion is below 200 ° C.
  • the cooling of the extruded profile has expediently be carried out so abruptly that it does not come to Mg 2 Si precipitates in a temperature range of 520 ° C to 200 ° C.
  • the subsequent hot forming step is then carried out in the shortest possible time to take advantage of the full formability of this material here too; before it comes to material hardening by Mg 2 Si precipitates.
  • the hot working temperature between 300 ° C and 600 ° C, preferably between 400 ° C. and to adjust to 520 ° C; If an embossing step is provided, it is expedient to set the forming temperature at the upper limit of the stated temperature range, ie near 600 ° C.
  • the workpiece in the context of the invention, in the processing of Al and Mg structural components to the hot forming process further processing stations can follow, preferably the hot curing in the heating furnace and then various mechanical processing stations, the workpiece can be cooled before hot curing in an upstream cooling zone.
  • the cooling zone can also be provided before the hot forming process.
  • the guide robots have a guide device, which is movable in a plane perpendicular to the pressing plane and / or rotatable about its longitudinal axis. It serves to deform the extruded profile within a plane of constant or variable radius and to twist the profile about its longitudinal axis.
  • cycle times with which the process and processing steps follow one another are significantly adapted to the respective extrusion rate. Accordingly, it is contemplated by the invention that for the production of Al structural components after extrusion, multiplication, e.g. a doubling of the production chain required for Mg structural components is established. This results as a result of significantly higher extrusion rates for aluminum components (up to 25 m / min) compared to magnesium components (up to 1.5 m / min).
  • the invention provides that at least one guide robot depending on the pressing path of the extruded and the respective curvature path-controlled, the Preßweg attached directly to the exiting strand by means of a guide robot Sensor device can be measured.
  • the extruded profile is thereby deformed by the guide robot and expediently supported by a handling robot, to be finally cut to length by a separation robot.
  • a run-out table can be sufficient for support.
  • both straight and curved components can be produced.
  • at least two guide robots are appropriate.
  • Robot technology requires a particularly great effort for the production of spatially rounded extruded profiles with variable curvature.
  • at least two spatial axes and the angle of rotation must be numerically controlled in addition to a displacement sensor.
  • the three-dimensionally curved extruded profile can no longer be placed on a run-off table, but must be supported in the space of two or more handling robots so that an undesirable deformation of the still soft extrusion is avoided.
  • an extrusion press 1 one or more guide robots 2 are connected downstream, which are controlled by means of a travel control 4.
  • the guide robots 2 have guide means, e.g. in the form of roller cages which guide or support the extruded extruded from the extruder 1 and - in the case of a rounded profile - deform with constant or variable curvature in a plane or in space.
  • guide means e.g. in the form of roller cages which guide or support the extruded extruded from the extruder 1 and - in the case of a rounded profile - deform with constant or variable curvature in a plane or in space.
  • separating robot 5 which is provided with a cutting tool, for example in the form of a circular saw, which cuts the extrusion during a brief interruption of the extrusion process.
  • a flying saw which cuts through the extrusion without interruption of the extrusion process by being moved together with the separation robot to which it is attached, with the extrusion.
  • a plurality of moving handling robot 3 are required, which are controlled so that they can be returned upon reaching an end position in a starting position, so that preferably always attack two handling robot 3 on the extrusion profile, while a third handling robot is implemented.
  • the guide robots 2 also take over the task of a handling robot 3.
  • the separated extruded profile is taken over by a handling robot 3, which either directly to the hot forming process 8 or upstream of this Cooling zone 9 feeds (Fig. 1).
  • a handling robot 3 which either directly to the hot forming process 8 or upstream of this Cooling zone 9 feeds (Fig. 1).
  • the finished-shaped structural component is in turn subjected to the process step of hot curing 10 via handling robot 3 or another transport device, before it is fed to a downstream processing center, for example by means of further handling robots 3.
  • Al structural component according to FIG. 1 is to be connected to further Mg modules, this is done either by gluing 7 before hot hardening 10 or in a welding and machining center 11 for friction stir welding of Al-Mg modules. Further machining can be done in a conventional machining center 12. Only then can the finished structural component be delivered to the dispatch 13.
  • cooling zone 9 is only required for special materials in which a rugged cooling before the hot forming process 8 is essential, as is the case, for example, on hardenable aluminum wrought alloys (Al-Mg-Si alloys). In these alloys, it is important to avoid hardening by Mg 2 Si precipitates in a temperature range of 520 ° to 200 ° C.
  • Fig. 2 relates to the production of structural components of Mg or Mg alloys. There is an indicated by a dashed frame 14 inert gas atmosphere required to ensure the unchanged microstructure of the processed material.
  • the inert gas atmosphere includes all manufacturing steps from the exit from the extruder 1 to the entrance to the hot forming process 8.
  • the hot forming process 8 may be followed by a cooling zone 9, which serves to accelerate the process, i. a faster supply of the extruded to the subsequent curing in the heating furnace 10 allows.
  • a cooling zone 9 is of course also in connection with the process control of FIG. 1 conceivable. If necessary. the component can be connected by gluing 7 with other components or modules before hot curing 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Extrusion Of Metal (AREA)

Claims (19)

  1. Procédé de fabrication de composants structuraux à partir d'un profilé extrudé, en particulier en Al, Mg ou leurs alliages, lequel profilé extrudé est guidé par un ou plusieurs outils de guidage (2) après la sortie de la matrice de l'extrudeuse (1) afin de le conformer en profilé droit ou incurvé respectivement arrondi, une portion d'extrémité étant séparée au moyen d'un outil de séparation et amenée successivement à une ou plusieurs autres stations de traitement, caractérisé en ce que la portion d'extrémité séparée est amenée à l'état chaud au moyen d'outils de préhension à un processus de formage à chaud (8) après le processus de séparation en maintenant la chaleur de l'élément extrudé.
  2. Procédé selon la revendication 1, caractérisé en ce que lors de la fabrication de composants structuraux en Mg, la chaîne de fabrication est totalement ou partiellement enveloppée dans un gaz de protection.
  3. Procédé selon la revendication 1, caractérisé en ce que lors de la fabrication de pièces à partir de composants structuraux en Al et Mg, ces pièces sont reliées entre elles par soudage par friction (11) ou par collage (7).
  4. Procédé selon la revendication 1, caractérisé en ce que le processus de formage à chaud (8) est un processus de formage à pression interne élevée, un processus de forgeage ou un processus d'estampage.
  5. Procédé selon la revendication 1, caractérisé en ce que le processus de formage à chaud (8) comporte une étape d'étalonnage.
  6. Procédé selon la revendication 1, caractérisé en ce qu'avant le processus de formage à chaud (8) ou avant de passer par d'autres stations de traitement, la température de formage à chaud ou respectivement la température de traitement est réglée à la température de processus optimale en refroidissant la pièce.
  7. Procédé selon la revendication 6, caractérisé en ce que pour fabriquer des composants structuraux en Mg, la température de formage à chaud est comprise entre 180°C et 400°C, avantageusement entre 225°C et 280°C.
  8. Procédé selon la revendication 6, caractérisé en ce que pour fabriquer des composants structuraux en Al, la température de formage à chaud est comprise entre 300°C et 600°C, avantageusement entre 400°C et 520°C.
  9. Procédé selon la revendication 1, caractérisé en ce que comme autres stations de traitement suivent le traitement de durcissement à chaud (10) puis le traitement mécanique après le processus de formage à chaud (8), dans lequel le composant est refroidi avant le traitement de durcissement à chaud (10) dans une zone de refroidissement (9) située en amont.
  10. Procédé selon la revendication 1, caractérisé en ce que la pièce est passée entre les stations de traitement au moyen d'outils de préhension du type robots de manipulation (3) qui suivent le profilé extrudé.
  11. Procédé selon la revendication 1, caractérisé en ce que des outils de guidage et de séparation sont conformés chacun à la façon de robots, c'est-à-dire en robots de guidage (2) et en robots de séparation (5).
  12. Procédé selon la revendication 11, caractérisé en ce que des robots de guidage (2) sont supportés de façon fixe à l'extérieur du profilé extrudé et sont dotés d'un dispositif de guidage qui est mobile dans un plan perpendiculaire au plan d'extrusion et/ou qui est apte à tourner autour de son axe longitudinal.
  13. Procédé selon la revendication 11, caractérisé en ce que des robots de séparation (5) sont chacun reliés fixes au profilé extrudé dans le rayon d'action d'une station de séparation, au moins pendant le fonctionnement du dispositif de séparation.
  14. Procédé selon la revendication 1, caractérisé en ce que lors de la fabrication de composants structuraux de courbure variable, au moins un robot de guidage (2) qui saisit le profilé extrudé est commandé en fonction de la course de l'extrudeuse ainsi que de la courbure du profilé extrudé.
  15. Procédé selon la revendication 14, caractérisé en ce que la course de l'extrudeuse est mesurée directement au niveau de la pièce extrudée qui sort au moyen d'un dispositif à capteur fixé sur le robot de guidage (2).
  16. Procédé selon la revendication 14, caractérisé en ce que le profilé extrudé est guidé jusqu'à son démoulage par plusieurs robots de guidage (2) commandes de façon à pouvoir reculer.
  17. Procédé selon la revendication 1, caractérisé en ce que les durées de cycle avec lesquelles les étapes de processus et de traitement se succèdent, sont adaptées à la vitesse d'extrusion.
  18. Procédé selon la revendication 17, caractérisé en ce que pour fabriquer des composants structuraux en Al après l'extrusion, il faut au moins doubler la chaîne de fabrication nécessaire aux composants structuraux Mg.
  19. Procédé selon la revendication 16, caractérisé en ce que le profilé extrudé est déformé par au moins un robot de guidage (2), au moins deux robots de manipulation (3) étant ramenés alternativement au début de la pièce extrudée et supportant le profilé extrudé sortant.
EP03702561A 2002-09-05 2003-01-29 Procede de fabrication de composants structurels a partir d'un profile extrude Expired - Lifetime EP1534443B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10241028A DE10241028B3 (de) 2002-09-05 2002-09-05 Verfahren zur Herstellung von bogenförmigen (gerundeten) Strukturbauteilen aus einem Strangpreßprofil
DE10241028 2002-09-05
PCT/EP2003/000893 WO2004022256A1 (fr) 2002-09-05 2003-01-29 Procede de fabrication de composants structurels a partir d'un profile extrude

Publications (2)

Publication Number Publication Date
EP1534443A1 EP1534443A1 (fr) 2005-06-01
EP1534443B1 true EP1534443B1 (fr) 2006-03-22

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EP03702561A Expired - Lifetime EP1534443B1 (fr) 2002-09-05 2003-01-29 Procede de fabrication de composants structurels a partir d'un profile extrude

Country Status (7)

Country Link
US (1) US6843093B2 (fr)
EP (1) EP1534443B1 (fr)
AU (1) AU2003205706A1 (fr)
CA (1) CA2419100C (fr)
DE (2) DE10241028B3 (fr)
NO (1) NO331856B1 (fr)
WO (1) WO2004022256A1 (fr)

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DE102017008907A1 (de) * 2017-09-22 2019-03-28 Audi Ag Verfahren und Werkzeug zur Kalibrierung eines durch Strangpressen erzeugten Hohlprofilbauteils für den Automobilbau
DE102018131967A1 (de) 2018-12-12 2020-06-18 Benteler Automobiltechnik Gmbh Verfahren zum Kalibrieren eines gekrümmten metallischen Hohlkammerprofils

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Publication number Priority date Publication date Assignee Title
DE102017008907A1 (de) * 2017-09-22 2019-03-28 Audi Ag Verfahren und Werkzeug zur Kalibrierung eines durch Strangpressen erzeugten Hohlprofilbauteils für den Automobilbau
US11235367B2 (en) 2017-09-22 2022-02-01 Audi Ag Method and tool for calibration of a hollow profile component produced by extrusion for automobile manufacturing
DE102018131967A1 (de) 2018-12-12 2020-06-18 Benteler Automobiltechnik Gmbh Verfahren zum Kalibrieren eines gekrümmten metallischen Hohlkammerprofils

Also Published As

Publication number Publication date
DE50302737D1 (de) 2006-05-11
AU2003205706A1 (en) 2004-03-29
WO2004022256A1 (fr) 2004-03-18
NO20041654L (no) 2004-04-23
DE10241028B3 (de) 2004-07-29
US20040045335A1 (en) 2004-03-11
EP1534443A1 (fr) 2005-06-01
CA2419100A1 (fr) 2004-03-05
US6843093B2 (en) 2005-01-18
CA2419100C (fr) 2006-09-05
NO331856B1 (no) 2012-04-23

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