EP2085164B1 - Procédé de formage d'un élément en tôle et dispositif destiné à la mise en oeuvre du procédé - Google Patents

Procédé de formage d'un élément en tôle et dispositif destiné à la mise en oeuvre du procédé Download PDF

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Publication number
EP2085164B1
EP2085164B1 EP20080021495 EP08021495A EP2085164B1 EP 2085164 B1 EP2085164 B1 EP 2085164B1 EP 20080021495 EP20080021495 EP 20080021495 EP 08021495 A EP08021495 A EP 08021495A EP 2085164 B1 EP2085164 B1 EP 2085164B1
Authority
EP
European Patent Office
Prior art keywords
rail
guidance system
ball
guide rail
carriage
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.)
Active
Application number
EP20080021495
Other languages
German (de)
English (en)
Other versions
EP2085164A1 (fr
Inventor
Detlef Kalweit
Stephan Knoche
Peter Broll
Alexander Reichart
Andreas Erhardt
Manuel Stoll
Maik Hammer
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP2085164A1 publication Critical patent/EP2085164A1/fr
Application granted granted Critical
Publication of EP2085164B1 publication Critical patent/EP2085164B1/fr
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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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/18—Spinning using tools guided to produce the required profile

Definitions

  • the invention relates to a method for forming a sheet metal part and a rail guide system for carrying out this method, according to the preamble of claim 1 or 3.
  • thermoforming is also characterized by a lack of flexibility with regard to possible changes in the geometry of the components to be manufactured. Basically, a change in geometry of the component to be manufactured requires the preparation of new thermoforming tools, which in turn are associated with corresponding investment costs.
  • the formed sheet metal components thus produced often do not have the desired quality.
  • the deformation is wave-shaped, which will be due in particular to the lack of mechanical rigidity of such a robot arm when machining by means of a robot.
  • a non-uniform deformation seems to be due in particular to the superimposition of several linear movements.
  • the invention therefore an object of the invention to further develop the method of incremental deformation of sheet metal parts to the effect that thus high-quality components can be produced. Furthermore, a device should be specified which is suitable for carrying out this method.
  • Claim 13 relates to the use of the rail guiding system of the invention for carrying out the method according to the invention.
  • the essence of the invention provides, in a method for forming a sheet metal part, in which a shaping mandrel is moved for continuous local deformation of the sheet metal part along a defined distance relative to this sheet metal part, to guide the mandrel on a guide rail imaging this route. It has been shown that with a corresponding configuration of the guide rail and the connection of the mandrel to this guide rail sufficiently high mechanical rigidity of this system can be achieved, so that as a result, the deformation of the sheet metal part sufficiently uniform and consequently high quality fails.
  • a particularly suitable for carrying out the method according to the invention rail guide system is defined in claim 3.
  • Such a rail guide system allows a very precise and in particular play-free guidance of the carriage on the guide rail, even if this has a complex three-dimensional curved course.
  • Such a course is often necessary because the mandrel for a good forming result should be regularly aligned as exactly as possible normal to the sheet metal plane of the sheet metal part to be formed.
  • the ball roller tracks are arranged in a portion of the individual rails, which is flat.
  • two parallel roller tracks are formed in the individual rails, wherein in the first part of the carriage housing at least four ball rollers are arranged such that in each of the ball roller tracks at least one ball roller is positioned.
  • the ball roller raceways are formed as internal profiles, so that on the rolling in these inner profiles ball rollers and lateral forces can be transmitted.
  • the inner profiles have a part-circular cross section whose radius substantially corresponds to the radius of the ball rollers. This training in turn promotes the freedom of play between the guide rail and the carriage guided on it.
  • the second sub-housing is formed corresponding to the first sub-housing.
  • This mirror-symmetrical design of the carriage allows a particularly easy and again backlash-free running on the guide rail.
  • the rail guide system on drive means for the carriage which may be formed in particular as a pulling and / or pushing element, wherein the pulling and / or pushing element may preferably be arranged between the individual rails.
  • these drive means are in the form of a plurality of juxtaposed balls which may be positioned in one or more guides of the individual rails. About this juxtaposed balls a compressive force for the drive of the carriage can advantageously transfer low-friction and backlash become. Furthermore, this type of drive power transmission is characterized by a - in contrast to corresponding tension cables - low elastic deformation of the drive means.
  • a fastening means for a tool can be arranged in the first and / or second partial housing of the carriage.
  • This may in particular be a forming mandrel, which is preferably arranged centrally between the ball rollers in order to distribute the transmission of tilting moments over the carriage on the guide rail as evenly as possible.
  • FIG. 1 a forming device in which preformed sheet metal parts (not shown), which are provided for the body of a motor vehicle, further processed by these locally additionally formed become. Specifically, a Umformsicke is introduced into the sheet along a predetermined route.
  • a forming mandrel 1 which can be moved along a guide rail 3 by means of a carriage 2, on this guide rail 3, wherein the forming mandrel 1 dips into the plane of the sheet and locally transforms the sheet metal part.
  • the desired Umformsicke is introduced into the sheet metal part; the forming bead thus corresponds in its course to the course of the guide rail 3.
  • An inventive rail guide system is integrated into the lower sheet metal holder 4 of the forming device and consists essentially of two adjacent extending guide rails 3, wherein for each of these guide rails a forming mandrel receiving carriage 2 is provided (different from this is in the FIG. 2 only shown in the lower guide rail a carriage), which is (not shown) via a drive device along the guide rail 3 movable.
  • Each of the guide rails 3 consists of two individual rails 3 ', which run parallel to each other at a uniform distance.
  • the individual rails 3 ' have a substantially rectangular cross-section.
  • On the top and bottom of each of these individual rails 3 'inner profiles 5 are formed in the longitudinal direction, which are parallel to each other and have a part-circular cross-section.
  • the inner profiles serve to guide ball rollers 6 of the carriage 2, wherein the radius of the part-circular inner profiles 5 substantially corresponds to the radius of the ball rollers 6, whereby a possible backlash-free rolling of the ball rollers 6 in the inner profiles 5 is ensured.
  • Along the inner surfaces of the two individual rails 3 ' is also a part-circular inner profile 7 is formed.
  • These two inner profiles 7 define a circular space, which serves to receive a plurality of ball 8.
  • the carriage 2 of the rail guide system consists essentially of two sub-housings 9, 10, which are connected to one another via a web 11. If the carriage 2 is mounted on the guide rail 3, the web 11 extends in the intermediate space between the two individual rails 3 ', wherein in each case one of the two sub-housings 9, 10 rests on a guide surface of the individual rails 3'.
  • Each of the sub-housings 9, 10 of the carriage 2 comprises a total of four ball rollers 6, which are arranged in corresponding receptacles of the sub-housing 9, 10.
  • the arrangement of the ball rollers 6 in the sub-housings 9, 10 is such that each of the ball rollers 6 is positioned in one of the part-circular inner profiles 5 on the top or bottom of the individual rails 3 '.
  • the carriage 2 also has a bore which is centrally located and leads as a through hole through both of the sub-housing 9, 10 and the web 11.
  • the bore serves to receive the forming mandrel. 1
  • the rail guide system according to the invention is characterized in particular by a backlash-free as possible arrangement of the carriage 2 on the guide rail 3.
  • a backlash-free as possible arrangement of the carriage 2 on the guide rail 3. By using ball rollers 6 and their special integration in the carriage guide rails 3 can be used with the rail guide system according to the invention having a complex three-dimensionally shaped course (in particular a double-curved course), the inventive design of the carriage 2 a smooth and guaranteed in particular play-free running on the guide rail 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (13)

  1. Procédé de transformation d'une pièce en tôle selon lequel la broche de formage (1) est déplacée le long d'un trajet défini par rapport à la pièce de tôle pour déformer localement et en continu la pièce de tôle,
    caractérisé en ce que
    la broche de formage (1) est guidée par un rail de guidage (3) copiant le trajet.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la broche de formage (1) est guidée le long d'un rail de guidage (3) courbé en trois dimensions.
  3. Système de guidage par rails comprenant un rail de guidage (3) et au moins un chariot (2) guidé le long des rails de guidage (3),
    caractérisé en ce que
    le système de guidage par rails comporte une broche de formage (1) déplacée par l'intermédiaire du chariot (2) le long du rail de guidage, et dans lequel
    - le chariot (2) comporte une première partie de boîtier (9) munie d'au moins deux galets à billes (6),
    - les rails de guidage (3) sont réalisés sous forme de rails doubles avec deux rails simples (3'), guidés en parallèle,
    - les rails simples (3') forment chacun au moins un chemin de galets à billes pour l'un des galets à billes (6),
    - le chariot (2) comporte une seconde partie de boîtier (10) située au moins en partie en regard de la première partie de boîtier (9) et s'appuyant contre le rail de guidage (3) et
    - la première partie de boîtier (9) et la seconde partie de boîtier (10) sont reliées par un élément de liaison (11) passant entre les rails séparés (3').
  4. Système de guidage par rails selon la revendication 3,
    caractérisé en ce que
    le chemins de circulation à galets à billes sont prévus dans un premier segment des rails séparés (3').
  5. Système de guidage par rails selon la revendication 3 ou 4,
    caractérisé en ce que
    les rails séparés (3') ont chacun deux chemins de circulation de galets à billes et la première partie de boîtier (9) comporte au moins quatre galets à billes et au moins un galet à billes (6) est placé sur ou dans chaque chemin de circulation de galets à billes.
  6. Système de guidage par rails selon l'une des revendications 3 à 5,
    caractérisé en ce que
    les chemins de circulation des galets à billes sont réalisés sous la forme de profilés intérieurs (5).
  7. Système de guidage par rails selon la revendication 6,
    caractérisé en ce que
    les profilés intérieurs (5) ont chacun une section en arc de cercle dont le rayon correspond pour l'essentiel à celui des galets à billes (6).
  8. Système de guidage par rails selon l'une des revendications 3 à 7,
    caractérisé en ce que
    la seconde partie de boîtier (10) est réalisée selon la première partie de boîtier (9).
  9. Système de guidage par rails selon l'une des revendications 3 à 8,
    caractérisé en ce que
    le rail de guidage (3) est courbé en trois dimensions.
  10. Système de guidage par rails selon l'une des revendications 3 à 9,
    caractérisé par
    un élément de traction et/ou de poussée pour les chariots (2) entre les rails séparés (3').
  11. Système de guidage par rails selon la revendication 10,
    caractérisé par
    un ensemble de billes (8) rangées les unes contre les autres et positionnées dans un ou plusieurs chemins de guidage (7) des rails séparés (3').
  12. Système de guidage par rails selon l'une des revendications 3 à 11,
    caractérisé par
    un moyen de fixation pour la broche de formage (1) installée en position centrale entre les galets à billes (6) dans le premier boîtier partiel (9) et/ou le second boîtier partiel (10).
  13. Application du système de guidage par rails selon la revendication 12 pour la mise en oeuvre du procédé selon les revendications 1 ou 2.
EP20080021495 2008-01-11 2008-12-11 Procédé de formage d'un élément en tôle et dispositif destiné à la mise en oeuvre du procédé Active EP2085164B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810004051 DE102008004051A1 (de) 2008-01-11 2008-01-11 Verfahren zum Umformen eines Blechteils und Vorrichtung zur Durchführung des Verfahrens

Publications (2)

Publication Number Publication Date
EP2085164A1 EP2085164A1 (fr) 2009-08-05
EP2085164B1 true EP2085164B1 (fr) 2010-04-21

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EP20080021495 Active EP2085164B1 (fr) 2008-01-11 2008-12-11 Procédé de formage d'un élément en tôle et dispositif destiné à la mise en oeuvre du procédé

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EP (1) EP2085164B1 (fr)
DE (2) DE102008004051A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8783078B2 (en) 2010-07-27 2014-07-22 Ford Global Technologies, Llc Method to improve geometrical accuracy of an incrementally formed workpiece

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69940582D1 (de) 1998-01-29 2009-04-30 Amino Corp Vorrichtung zum herstellen von plattenmaterial
JP4628928B2 (ja) * 2000-04-17 2011-02-09 株式会社日立製作所 逐次成形方法
JP3753608B2 (ja) * 2000-04-17 2006-03-08 株式会社日立製作所 逐次成形方法とその装置
DE10324244A1 (de) 2003-05-28 2004-12-30 Bayerische Motoren Werke Ag Verfahren zur Herstellung individualisierter Außenhautblechteile aus in Serienfertigung hergestellten Serienaußenhautblechteilen für Fahrzeuge sowie nach diesem Verfahren hergestellte Außenhautblechteile
DE102006002146B4 (de) * 2006-01-17 2011-07-21 Daimler AG, 70327 Vorrichtung zur Herstellung eines Bauteils durch inkrementelle Umformung eines Metallblechs und Verfahren zur Herstellung einer Skelettpatrize

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EP2085164A1 (fr) 2009-08-05
DE502008000564D1 (de) 2010-06-02
DE102008004051A1 (de) 2009-07-16

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