EP2259883A1 - Procédé de commande de flux de matière lors de l'emboutissage profond d'une pièce et dispositif d'emboutissage profond - Google Patents

Procédé de commande de flux de matière lors de l'emboutissage profond d'une pièce et dispositif d'emboutissage profond

Info

Publication number
EP2259883A1
EP2259883A1 EP09730365A EP09730365A EP2259883A1 EP 2259883 A1 EP2259883 A1 EP 2259883A1 EP 09730365 A EP09730365 A EP 09730365A EP 09730365 A EP09730365 A EP 09730365A EP 2259883 A1 EP2259883 A1 EP 2259883A1
Authority
EP
European Patent Office
Prior art keywords
deep
workpiece
bead
deep drawing
punch
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.)
Granted
Application number
EP09730365A
Other languages
German (de)
English (en)
Other versions
EP2259883B1 (fr
Inventor
Thomas Flehmig
Klaus GÖHLER
Konstantinos Savvas
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.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Steel Europe AG
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 ThyssenKrupp Steel Europe AG filed Critical ThyssenKrupp Steel Europe AG
Publication of EP2259883A1 publication Critical patent/EP2259883A1/fr
Application granted granted Critical
Publication of EP2259883B1 publication Critical patent/EP2259883B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor
    • 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
    • B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening

Definitions

  • the invention relates to a method for
  • the invention relates to a deep-drawing device with a deep-drawn die, which has a guide portion and a mold portion, with a hold-down, which supports the positioning of the workpiece during the deep-drawing operation on the guide portion, and with a thermoforming punch, which exerts the force required for deep drawing.
  • workpieces can ' be used whose diameter does not exceed the maximum diameter specified by the respective draw-down ratio in relation to a cup deep-drawing test.
  • the deep drawing process can then be used only for the production of drawn parts in certain size ranges.
  • the flange portions of the workpiece are comparatively narrow, so that increased care must be taken during the deep drawing operation.
  • Thermoforming stamp is gradually reduced.
  • the predetermined by the Grenzzieh2020 condition can be maintained longer even when using workpieces with large diameters.
  • the tooling is increased by this approach.
  • the cycle time in production is extended, which reduces the efficiency of the process.
  • Facilitating the flow of material from the flange area into the deep-drawn areas by reducing the flow-inhibiting friction of the workpiece on the deep-drawing die and / or hold-down by the use of lubricants can indeed assist, but not fully guarantee, correct process control.
  • a material flow control is carried out during the deep drawing of sheets by embossing a Z-shaped shut-off stage in the sheet edge, which inhibits the flow of material.
  • the present invention is therefore based on the object to provide a method and an apparatus with which or with which the drawability of a workpiece better utilized and better dimensional accuracy, in particular of the bottom of the drawn part can be achieved.
  • the object is achieved by a method for material flow control during deep drawing of a workpiece, wherein the
  • Drawing part can be improved. Because by the incorporation of the bead, a pre-stretching of the bottom regions is first achieved, which favors the interaction of the deep-drawing die with the bottom region taking place in the course of the deep-drawing process increment following the incorporation of the bead. In addition, more material from the flange portion of the workpiece can flow into the frame as it approaches the frame. As a result, the risk of material fracture, for example in the region of the frame or the floor, which may be caused in particular by a material accumulation, reduced. Thus, it is possible to achieve a drawing depth with predetermined workpieces, which in particular goes up to a factor of 2.5 beyond the drawing depth predetermined by the known drawing-off ratio.
  • the bead is incorporated only in the region to be formed corners of the workpiece.
  • the inventive method can be implemented more efficiently. Because in principle, the risk of material jams occurs only in more curved areas such as corners reinforced. In contrast, in largely rectilinear areas of a drawn part, for example on the long side of a rectangular box, the flow behavior of the material may be sufficient, even without the additional provision of a bead, in order to achieve a satisfactory deep drawing result.
  • the bead is incorporated with rounded contours.
  • the inventive method for use on workpieces made of sensitive materials can be made suitable. Because the roundness of the contours gently modifies the flow behavior of the material. Material impairments due to sharp-angled contours are thus avoided.
  • the bead is incorporated with parallel to the deep drawing and / or inclined walls.
  • the pre-stretching effected by the incorporation of the bead is advantageously carried out essentially in the deep-drawing direction.
  • the process control of the deep drawing process increment following the incorporation of the bead can be improved.
  • the object is also achieved by a deep-drawing device, which is particularly suitable for carrying out one as described above
  • ZI / jb 070737WO March 31, 2009 Method is suitable, with a deep-drawing die, which has a guide portion and a mold portion, with a hold-down, which supports the positioning of the workpiece during the deep drawing operation on the guide portion, and with a deep-drawing die, which exerts the force required for deep drawing, solved, wherein a is independently operable bead stamp is provided, whose contour is adapted to the contour of the guide portion.
  • the beads can be worked into the flange area of the workpiece without having to use a drive coupled to the deep-drawing punch, to the deep-drawing die and / or to the blank holder.
  • the operation of the bead punch can be very flexibly tuned to the operation of the other components of the device. This facilitates in particular the process control of the deep-drawing process.
  • the bead punch has two or more protrusions.
  • two or more depressions are then arranged opposite the projections, into which the projections can be inserted upon actuation of the bead punch. In this way, more than one bead can be incorporated into the material in the flange region of the workpiece with simple means.
  • FIG. 1a-g an embodiment of the method according to the invention on a schematically depicted, inventive device in a cross-sectional view.
  • FIG. 1a shows a section of a deep-drawing device 2 according to the present invention in a schematic cross-sectional representation.
  • the deep-drawing device 2 comprises a deep-drawing die 4, a deep-drawing die 6, the
  • the bead punch 12 has on its the guide portion 14 of the deep drawing die 6 side facing two projections 16, which in two at the
  • both recesses 18 and both projections 16 each have the same contour.
  • the contours can be designed differently with each other when several recesses 18 and projections 16, if appropriate. It is of course also possible to provide only a single recess 18, to which the bead punch 12 is then adapted accordingly.
  • the only hold-down 10 is in this example on the side facing away from the deep-drawing die 4 side of the bead punch 12th
  • Deep drawing direction inclined extending wall surface which is arranged in this example on the further of the deep-drawing die 4 side of the recess 18, whereas on the deep drawing die 4 closer side of the recess 18 arranged wall surfaces to the deep drawing direction substantially parallel.
  • another contour is conceivable.
  • a workpiece 20 for example a steel blank, is arranged in the deep-drawing device 2 between the guide section 14 of the deep-drawing die 6 on one side and the punch 12 and the blank holder 10 on the other side.
  • Sick punch 12 is in an elevated position, whereas the hold-10 is already applied to the workpiece 20 under slight pressure.
  • the deep-drawing die 4 is located in such a position over the deep-drawing die 6 that it is preferably in light contact with the workpiece 20.
  • FIG. 1 b shows, in a first step, how the beads 22 are worked into the flange region of the workpiece 20.
  • the bead punch 12 is lowered onto the guide section 14 independently of the other components 4, 6, 10. By inserting the projections 16 in the on
  • Deep-drawing punch 4 and deep-drawing die 6 arranged portion of the workpiece 20, which is at least partially used for the formation of the soil to. Further, the material is prepared by incorporating the beads 22 for the following deep drawing operation increment. In this simple schematic representation and in the following, a possible change in the thickness of the workpiece 20 is not shown for the sake of clarity.
  • the bead punch 12 is again brought into the raised position, so that it is preferably no longer in the plane of the workpiece 20.
  • Fig. Ic shows the first deep drawing operation increment.
  • Deep-drawing die 4 is moved by a certain distance in the direction of the mold section 8 of the deep-drawing die 6.
  • the workpiece 20 is detected by the deep-drawing die 4 and drawn into the mold section 8 by the appropriate distance.
  • the distance is just dimensioned such that the material used to form the bead 22, which is closer to the deep-drawing die 4, is completely expended for the deep-drawing operation increment.
  • the said bead 22 is largely reshaped from the workpiece 20. In this way, the material can flow well both in largely rectilinear and in more curved areas, for example at corners.
  • Fig. Id shows how once again the punch 12 is actuated independently of the other components 4, 6, 10 of the thermoforming device 2 and the beads 22 are incorporated into the remaining flange portion of the workpiece 20.
  • the material is fed to the beads 22 substantially from the outer part of the flange.
  • thermoforming stamp 4 will continue towards the
  • Form section 8 to be driven.
  • the deep drawing die 4 closer bead 22 is again almost formed out.
  • the thermoforming punch 4 remains in the position shown.
  • Fig. If shows the next operation of the bead punch 12.
  • the flange has become so narrow by the deep drawing process that only one bead 22 can be incorporated.
  • Fig. 1g shows the last deep drawing operation increment.
  • Deep-drawing die 4 is moved in this example to the stop on the mold section 8 of the deep drawing die 6.
  • the workpiece 20 is thereby almost completely pulled out of the area between the guide section 14 and the punch 12.
  • the thermoforming process is over.
  • Thermoforming punch 4 can now be raised to remove the finished drawn part of the deep-drawing die 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

La présente invention concerne un procédé de commande de flux de matière lors de l'emboutissage d'une pièce. L'objectif de l'invention est de proposer un procédé permettant de mieux exploiter la capacité d'emboutissage d'une pièce et d'obtenir une plus grande précision de forme, notamment de la partie inférieure de la pièce emboutie. Cet objectif est atteint grâce à un procédé selon lequel le processus d'emboutissage profond est effectué de manière incrémentielle et, avant chaque incrément de processus d'emboutissage profond, au moins une moulure est pratiquée dans la zone de rebord de la pièce. On améliore ainsi la précision de forme de la partie inférieure et on évite des accumulations de matière dans la zone de rebord. L'invention concerne également un dispositif d'emboutissage profond (2).
EP09730365.5A 2008-04-07 2009-03-31 Procédé de commande de flux de matière lors de l'emboutissage profond d'une pièce et dispositif d'emboutissage profond Not-in-force EP2259883B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008017728A DE102008017728B4 (de) 2008-04-07 2008-04-07 Verfahren zur Materialflusssteuerung beim Tiefziehen eines Werkstücks
PCT/EP2009/053835 WO2009124860A1 (fr) 2008-04-07 2009-03-31 Procédé de commande de flux de matière lors de l'emboutissage profond d'une pièce et dispositif d'emboutissage profond

Publications (2)

Publication Number Publication Date
EP2259883A1 true EP2259883A1 (fr) 2010-12-15
EP2259883B1 EP2259883B1 (fr) 2013-07-31

Family

ID=40727250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09730365.5A Not-in-force EP2259883B1 (fr) 2008-04-07 2009-03-31 Procédé de commande de flux de matière lors de l'emboutissage profond d'une pièce et dispositif d'emboutissage profond

Country Status (4)

Country Link
US (1) US9327332B2 (fr)
EP (1) EP2259883B1 (fr)
DE (1) DE102008017728B4 (fr)
WO (1) WO2009124860A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2695101C (fr) * 2010-03-01 2012-10-16 Honda Motor Co., Ltd. Reduction des dechets dans les procedes d'etampage du metal et systemes a cet effet
WO2013183657A1 (fr) 2012-06-07 2013-12-12 東洋製罐株式会社 Procédé d'emboutissage profond-moulage et matrice métallique de moulage pour celui-ci
DE102014211220A1 (de) * 2014-06-12 2015-12-17 Volkswagen Aktiengesellschaft Ziehwerkzeug zur Blechbearbeitung mit wenigstens einer Rückhalteeinrichtung und Verfahren zum Betrieb dieses Ziehwerkzeugs
CA2960748C (fr) * 2014-09-12 2019-01-15 Honda Motor Co., Ltd. Procede de formage a la presse et dispositif d'agrandissement de materiau en plaque utilise dans ledit procede
DE102015101717A1 (de) 2015-02-06 2016-08-11 Thyssenkrupp Ag Verfahren und Vorrichtung zum Auskragen eines Werkstücks
CN105149455B (zh) * 2015-09-28 2017-04-05 华南理工大学 一种深筒形件拉深成形方法及其模具
US20190255587A1 (en) * 2018-02-20 2019-08-22 GM Global Technology Operations LLC Stamped component with improved formability
US11845122B2 (en) * 2020-11-24 2023-12-19 Fca Us Llc Stamping machine and method including variable binder gap
US11766709B2 (en) * 2021-03-08 2023-09-26 Ford Global Technologies, Llc Forming die with reverse bead geometry
US20230026889A1 (en) * 2021-07-22 2023-01-26 Ford Motor Company Controllable and adjustable stamping draw bead with reverse bead geometry

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CH629981A5 (en) * 1978-06-08 1982-05-28 Aluminiumwerke Ag Rorschach Apparatus for the deep-drawing of a drawn part
JPS59206120A (ja) 1983-05-07 1984-11-21 Toyota Motor Corp 絞りプレスの成形方法とその装置
US4615205A (en) * 1984-06-18 1986-10-07 Rca Corporation Forming a shadow mask from a flat blank
JPS6427726A (en) * 1987-07-22 1989-01-30 Honda Motor Co Ltd Springback preventing press die
JP2579318B2 (ja) 1987-07-30 1997-02-05 旭化成工業株式会社 布帛筒状体を用いた柱状硬化体の地中造成方法
JPS6433315U (fr) * 1987-08-12 1989-03-01
JP2605324B2 (ja) * 1988-01-21 1997-04-30 三菱電機株式会社 シヤドウマスク成形装置およびシヤドウマスク成形方法
JPH0366423A (ja) * 1989-08-01 1991-03-22 Toyota Auto Body Co Ltd 深絞り成形方法及びその絞りプレス型
IT1239511B (it) * 1990-03-30 1993-11-03 Videocolor Spa Metodo di formatura di una maschera d'ombra per un tubo di riproduzione di immagini a colori
JPH0483419A (ja) 1990-07-26 1992-03-17 Seiko Epson Corp 半導体装置
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Also Published As

Publication number Publication date
DE102008017728A1 (de) 2009-10-08
EP2259883B1 (fr) 2013-07-31
US9327332B2 (en) 2016-05-03
DE102008017728A9 (de) 2010-08-19
WO2009124860A1 (fr) 2009-10-15
US20110094283A1 (en) 2011-04-28
DE102008017728B4 (de) 2012-05-16

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