EP2448691A1 - Maschine zum stanzen von gekrümmten rohlingen - Google Patents

Maschine zum stanzen von gekrümmten rohlingen

Info

Publication number
EP2448691A1
EP2448691A1 EP10734503A EP10734503A EP2448691A1 EP 2448691 A1 EP2448691 A1 EP 2448691A1 EP 10734503 A EP10734503 A EP 10734503A EP 10734503 A EP10734503 A EP 10734503A EP 2448691 A1 EP2448691 A1 EP 2448691A1
Authority
EP
European Patent Office
Prior art keywords
blank
machine
stamping
bezel
profile
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Withdrawn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
EP10734503A
Other languages
English (en)
French (fr)
Inventor
Gérald FOULON
Benoît DE CROMBRUGGHE
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP2448691A1 publication Critical patent/EP2448691A1/de
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor

Definitions

  • the present invention relates to the field of stamping metal parts or plastic.
  • embossing consists of deforming a plate, also called blank (sheet metal in the case of a metallic material) by means of a stamping machine, comprising a female tool, generally called a matrix, and a male tool, usually called punch.
  • a blank holder Before penetrating the punch into the die, it is necessary to immobilize the plate by means of a blank holder, as is known for example from FR2200067: such a blank holder prevents the formation of folds or breaks in the blank to be stamped.
  • the correct positioning of the blank with respect to the blank is generally done by means of dredgers, which are in fact some sort of lateral guides allowing a correct centering of the blank with respect to the blank holder.
  • dredgers which are in fact some sort of lateral guides allowing a correct centering of the blank with respect to the blank holder.
  • the present invention is intended to solve this problem.
  • This object of the invention is achieved with a machine for stamping a blank, comprising a die, a punch, a blank holder having a curved surface and bezers capable of centering a blank to be stamped with respect to said blank holder, which is remarkable for at least one of said bezels has a profile corresponding substantially to the path followed by the edge of the blank cooperating with the bezel when the blank comes to marry said surface under the effect of its own weight.
  • this particular profile of the bezel it can maintain the edge of the blank closer to the bezel when the blank deforms under the effect of its weight on the curved surface of the blank holder, and thus prevent the appearance of a game between this bezel and this blank: one can in this way limit the uncontrolled movements of the blank, and improve the repeatability of the centering of the blank in the stamping machine.
  • said bezel has a substantially circular profile
  • said machine comprises a plurality of bezels, each bezel having a profile substantially corresponding to the path followed by an edge of said blank: this makes it possible to ensure optimal immobilization of the blank; said machine is adapted to stamp said blank by thermoforming: this embodiment is suitable for stamping plastic blanks.
  • stamping blank 1 arriving on a stamping machine 3.
  • the blank 1 is in fact a metal plate or plastic, which it is desired to conform in a particular way, for example for the purpose of using it as an element of the bodywork of a motor vehicle.
  • the stamping machine 3 comprises a female tool, generally called a matrix, symbolized by the arrow 7 of the figure, and a male tool generally called a punch, symbolized by the arrow 5 in the figure.
  • the blank 1 Prior to the stamping operation itself, the blank 1 is deposited on a blank holder.
  • This blank holder makes it possible to immobilize the blank during the stamping operation, and thus to prevent the formation of folds or breaks.
  • the blank it is desirable to give the blank a curved shape, and thus uses a blank holder whose surface 9 has the desired shape.
  • each bezel 13 has a rectilinear profile extending substantially along the vertical axis Z, as indicated by the dotted line 15.
  • the bezel 13 loses its ability to correctly center the blank 1 with respect to the stamping machine 3, and more particularly with respect to the blank holder.
  • the improper centering of the blank 1 relative to the stamping machine has many drawbacks, among which repeatability problems generating geometrical dispersions and appearance defects on skin pieces during the stamping phase.
  • the present invention proposes to give the bezel 13 a profile substantially corresponding to the path that follows the edge 17 of the blank 1 when it moves from its flat position (shown in dashed lines in the figure) to its curved position (shown in solid lines in the figure).
  • this particular profile of the bezel 13, represented by the solid line 19 in the appended figure, is substantially tangent to the path followed by the edge 17 of the blank 1 between the two aforementioned positions.
  • the edge 17 remains substantially in contact with the profile 19 of the bezel 13, which prevents any movement of the blank by relative to this bezel: in this way, the problems of geometrical dispersion of the stamping are overcome, and it is thus possible to guarantee excellent repeatability of the latter.
  • thermoforming thermoforming
EP10734503A 2009-07-03 2010-05-31 Maschine zum stanzen von gekrümmten rohlingen Withdrawn EP2448691A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0954596A FR2947467B1 (fr) 2009-07-03 2009-07-03 Machine a emboutir les flans galbes
PCT/FR2010/051047 WO2011001053A1 (fr) 2009-07-03 2010-05-31 Machine a emboutir les flans galbes

Publications (1)

Publication Number Publication Date
EP2448691A1 true EP2448691A1 (de) 2012-05-09

Family

ID=41431538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10734503A Withdrawn EP2448691A1 (de) 2009-07-03 2010-05-31 Maschine zum stanzen von gekrümmten rohlingen

Country Status (3)

Country Link
EP (1) EP2448691A1 (de)
FR (1) FR2947467B1 (de)
WO (1) WO2011001053A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3064200B1 (fr) * 2017-03-22 2019-06-14 Peugeot Citroen Automobiles Sa Drageoir pour une machine d''emboutissage d''un flan, comprenant un socle de reception de corps interchangeables a surfaces de forme differenciees.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT316270B (de) * 1972-09-22 1974-07-10 Verzinkerei Zug Ag Tiefziehverfahren und Tiefziehwerkzeug zur Durchführung des Verfahrens
FR2729594B1 (fr) * 1995-01-19 1997-03-21 Cerec Procede et dispositif de formage a froid de fonds bombes
FR2751247B1 (fr) * 1996-07-16 1998-10-16 Wendling Christiane Kuhn Procede de fabrication d'une bouteille metallique destinee a contenir un fluide sous pression

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011001053A1 *

Also Published As

Publication number Publication date
FR2947467B1 (fr) 2011-06-10
WO2011001053A1 (fr) 2011-01-06
FR2947467A1 (fr) 2011-01-07

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