EP3242757B1 - Werkzeug und verfahren zum formen einer kante eines stanzstückes mit unterschnittrückführung - Google Patents

Werkzeug und verfahren zum formen einer kante eines stanzstückes mit unterschnittrückführung Download PDF

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Publication number
EP3242757B1
EP3242757B1 EP15817981.2A EP15817981A EP3242757B1 EP 3242757 B1 EP3242757 B1 EP 3242757B1 EP 15817981 A EP15817981 A EP 15817981A EP 3242757 B1 EP3242757 B1 EP 3242757B1
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EP
European Patent Office
Prior art keywords
edge
stamping
receiving surface
die
slide
Prior art date
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Active
Application number
EP15817981.2A
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English (en)
French (fr)
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EP3242757A1 (de
Inventor
David PICHON
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
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PSA Automobiles SA
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Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3242757A1 publication Critical patent/EP3242757A1/de
Application granted granted Critical
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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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • B21D19/082—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for making negative angles
    • B21D19/084—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for making negative angles with linear cams, e.g. aerial cams

Definitions

  • the invention relates to the forming of a workpiece, preferably of a motor vehicle body, by stamping. More particularly, the invention relates to forming a piece of elongated and narrow shape, with the return of an edge.
  • a motor vehicle body side generally includes an elongated upper portion along its connection to the roof horn and the windshield window of the vehicle.
  • the upper portion is generally of a small size section relative to the total height of the body side.
  • the upper portion may be of a very narrow section along the bay window, such a section to increase the brightness inside the vehicle.
  • JP-H-08-164420A discloses stamping press press tooling according to the preamble of claim 1.
  • the patent document FR 3 002 746 A1 discloses a stamping tool of an elongated stamped portion, more precisely one side of a motor vehicle body.
  • the tool comprises a matrix forming a receiving surface of the elongate portion of the stamping, a punch mounted on a slider being adapted to deform the stamped undercut against the receiving surface.
  • a lower frame supports the die, an upper frame supports the slider.
  • the tooling further includes a presser mounted on the upper frame for pressing an inner portion of the edge of the press.
  • the lower and upper frames are configured to cooperate by bringing together so as to achieve the pressing and deformation of the stamping.
  • the matrix is slidable in the first frame by spacing the upper frame so as to extract the stamped deformed undercut the die.
  • the object of the invention is to propose a solution that overcomes at least one of the drawbacks of the state of the art, in particular of the state of the art mentioned above.
  • the invention aims to propose a solution allowing the setting shape of an elongated pressed edge that is economical and satisfactory from a stamping point of view.
  • distal portion of the edge of the stamping means a portion of the edge of the stamped which is distal or remote from the center of the stamping. This is the portion of the edge extending along the free end of said edge.
  • the auxiliary presser is mounted to move in translation on the slide, preferably in a direction parallel to the sliding direction of the slide.
  • the slide comprises elastic means, such as one or more springs, exerting an elastic force on the auxiliary pressure.
  • This elastic force is directed towards the receiving surface of the stamping on the die.
  • the auxiliary presser comprises a pressing surface with an irregular profile, preferably a ribbed profile.
  • the slide comprises a first sliding surface relative to the first frame and a second sliding surface relative to the second frame.
  • the receiving surface is generally elongated, the section of said surface having a generally curved profile, preferably forming an undercut.
  • the receiving surface portion cooperating with the slide comprises a first concave profile cooperating with the punch and a second generally straight profile cooperating with the auxiliary presser.
  • the receiving surface is formed by two adjacent matrix elements movable in translation relative to one another.
  • the tooling further comprises a first, preferably lower, frame supporting the die; a second frame, preferably higher, supporting the slide adapted to cooperate with the matrix by bringing the first and second frames together; the slide being slidable relative to the matrix in a direction inclined relative to the direction of approach, an angle of between 20 ° and 80 ° to deform the edge of the stamping.
  • the first frame comprises moving cams by bringing the second frame closer together, the die being supported by said cams.
  • the first frame comprises a plug adapted to slide longitudinally in said frame, said plug comprising a first row and a second row of cams adapted to cooperate with the first and second elements of the matrix, respectively, to ensure the mobility of said elements, said plug being slidable by bringing the second frame towards said frame.
  • the cams are configured so that the movements of the two elements of the matrix are successive.
  • the receiving surface is formed by two adjacent matrix elements movable in translation relative to one another, the method comprising a step c) sliding towards the lower frame of the one then the other of the two elements for the extraction of the die from the edge of the stamped deformation in step b).
  • the stamping forming process is followed by a step of cutting the distal portion of the edge of the stamping.
  • the measures of the invention are interesting in that the elongated edge of the stamping is shaped over its entire length in a single stamping pass, which is economical. Indeed, the elongate stamping is tightly adapted to prevent quality defects. In particular, the clamping of the distal portion of the edge of the stamping allows to achieve the necessary tension to form without visible deformation of said portion.
  • the figure 1 is a view of a body side 2 of a motor vehicle.
  • the body side 2 comprises passages 4 for receiving doors. Above these doorways, the body side 2 comprises an elongated upper edge 6 shaped on a rear portion 8 intended to make the link with the roof of the vehicle and on a front portion 10 intended to make the link with the windshield window of the vehicle.
  • the figure 2 is a top view of a stamping press press tooling 12 according to the invention. More specifically, we can see a first frame 14 of the tool 12, in this case the lower frame.
  • the lower frame 14 supports a die 16 which can be seen a receiving face 18 of the stamping for its shaping.
  • the receiving face 18 here illustrated the shape of the body side presented in relation to the previous figure; in particular, the shape of the elongated upper edge of the body side can be seen.
  • the receiving face 18 comprises receiving surfaces 20 towards the rear and 20 'towards the front of the elongate edge. Rear and front is heard along the longitudinal axis of the vehicle. These receiving surfaces 20 and 20 'may comprise undercut portions.
  • the tool 12 is intended to implement a method of forming the elongated edge of the stamping.
  • the method comprises the step a) of receiving the elongated edge of the stamping in the stamping press tooling 12, then it comprises the step b) deformation of the edge of the stamping.
  • the receiving surface 20 ' consists of two adjacent matrix members 22 and 22'. These two adjacent elements 22 and 22 'are movable in translation relative to each other for the extraction of the stamping of the die 16 after forming the stamping.
  • the receiving surface 20 'of the die 16 formed by the two members 22 and 22' extends in this case only over a portion of the length of the die in the longitudinal direction.
  • the receiving surface 20 'further extends in a mean direction inclined with respect to the receiving surface 20 outside the two elements 22 and 22'.
  • the average inclination in question corresponds to that of the inclined front edge of the stamped intended to receive the window windshield.
  • the particular extent and direction of the receiving surface 20 ' are made in connection with the particular shaping of the stamping, they however do not limit the invention.
  • FIGS. 3 and 4 are views in section III-III of the stamping press tooling 12 according to the invention.
  • the cut is made at the front of the tool 12 at the receiving surface 20 'of the die 16 comprising the two adjacent elements 22 and 22'.
  • the figure 3 is a sectional view III-III of press tooling 12 forming stamped, including motor vehicle body.
  • the tool 12 is shown in step a) of the method according to the invention, a step which comprises receiving the elongated edge of the stamping.
  • the lower frame 14 comprising the matrix 16 in its portion comprising the two adjacent elements 22 and 22 'movable relative to each other and forming the receiving surface 20' of the edge of the stamping.
  • the receiving surface 20 ' is elongate, the section of said surface having a generally curved profile, it presents in this case a profile forming an undercut 28. It can be seen, on the portion of the enlarged image to the right of the main image, the slope 28 of the receiving surface 20 'forming the undercut.
  • the enlarged image portion does not include the stamp.
  • the tooling 12 comprises a second frame 30, in this case an upper frame, supporting the slide 26 presented in connection with the figure 1 .
  • the upper frame 30 further comprises a main presser 32 mounted spring-mounted on the upper frame 30. By bringing the lower and upper frames 14 and 30 closer together, the main presser 32 is able to press the edge 6 of the press 2 against a central and main portion 34 of the receiving surface 20 'of the matrix 16.
  • the slider 26 is also able to cooperate with the matrix 16.
  • the slider 16 comprises a punch 36 and an auxiliary presser 38; the punch 36 is able to deform the stamping against a portion 40 of the receiving surface 20 'and the auxiliary presser 38 is able to press a distal portion of the edge 6 of the press against a corresponding portion 42 of the receiving surface 20 'of the die 16 before deforming said edge.
  • distal portion of the edge 6 of the stamp 2 is meant a portion of the edge of the stamping which is distal or remote from the center (not visible) of the stamp 2. This is the portion of the edge s' extending along the free end of the elongated edge 6.
  • the portion 40 of the receiving surface 20 'with which the punch 36 cooperates forms a first concave profile; the portion 42 of the surface of receiving 20 'with which cooperates the auxiliary presser 38 forms a second generally straight profile.
  • the auxiliary presser 38 is mounted to move in translation on the slider 26, preferably in a direction parallel to the direction of sliding of the slider 26.
  • the slider comprises elastic means, such as one or more springs 44, exerting an elastic force on the auxiliary presser 38. This elastic force is directed towards the receiving surface 20 'of the stamping on the die.
  • the auxiliary presser 38 may comprise a pressing surface 39 with an irregular profile, preferably a ribbed profile. A corresponding rib 46 can be seen on the portion 42 of the receiving surface 20 '.
  • the slider 26 is slidable with respect to the die 16 in an inclined direction, with respect to the direction of approach between the upper and lower frames, of an angle of between 20 ° and 80 ° in order to deform the edge 6 of the stamped.
  • the direction of approach between the frames is illustrated by an arrow on the image.
  • the slider comprises a first sliding surface 48 with respect to the lower frame 14 and a second sliding surface 50 with respect to the upper frame 30.
  • the presser 32, the presser auxiliary 38 and the punch 36 are also intended, in the same approaching movement of the lower and upper frames 14 and 30, to press the edge 6 of the stamping 2 against the receiving surface referenced "20" in connection with the figure 2 that of the die 16 outside the receiving surface 20 'formed by the two elements 22 and 22'.
  • the figure 4 is a view in the same plane of section as that seen in relation to the figure 3 .
  • a step which comprises deforming the elongated edge 6 of the stamping 2 as well as pressing by means of the auxiliary presser 38 from the edge of the stamping before and / or during its deformation.
  • the first and second sliding surfaces 48 and 50 of the slider 26 have slid with respect to the corresponding frames so as to effect the pressing of the distal portion 52 of the edge 6 by the auxiliary presser 38 as well as the deformation of the edge 6 by the punch 36.
  • the main presser 32 also press against the central portion 54 of the edge 6.
  • the lower frame 14 comprises cams 56 and 56 'which are movable by bringing the upper frame 30 towards the frame lower 14, the matrix 16 being supported by said cams 56 and 56 '.
  • the first frame 14 comprises a plug 58 adapted to slide longitudinally in said frame 14; the plug 58 comprises the two rows of cams 56 and 56 'able to cooperate with the first and second elements 22 and 22' of the matrix 16, respectively, in order to ensure the mobility of said elements.
  • the first element 22 of the matrix 16 comprises a first sliding surface 60 with the lower frame 14 so as to ensure a first mobility of the first element 22 relative to said frame.
  • the first element 22 further comprises a second sliding surface 62 with the second element 22 'so as to ensure a second mobility of the second element 22' relative to the first element 22.
  • the plug 58 is sliding longitudinally by bringing the upper frame 30 closer to the lower frame 14; the mechanism generating this sliding is however not represented.
  • the cams 56 and 56 ' are configured so that the movements of the two elements 22 and 22' of the matrix 16 are successive.
  • the method according to the invention may also include extracting the stamping of the matrix made in a step c) (not shown) of sliding towards the lower frame 14 of the second element 22 'of the two elements and then sliding towards said frame of the first element 22 of the two elements. This displacement of the two elements 22 and 22 is made so that the edge 6 of the embossment 2 forming an undercut can be extracted from the matrix 16.
  • the method according to the invention may also comprise a step of ) (not shown) of cutting the distal portion 52 of the edge of the stamping, this cutting of the distal portion being made on another tool.

Landscapes

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

Claims (7)

  1. Stanzwerkzeug (12) zum Formen eines Stanzstücks, insbesondere einer Kraftfahrzeugkarosserie, das Folgendes umfasst:
    - ein Gesenk (16) mit einer Aufnahmeoberfläche (20; 20') des Stanzstücks, das dazu bestimmt ist, mit dem einen Hauptpresser (32) zusammenzuwirken;
    - einen Stößel (26) mit einem Stempel (36), der geeignet ist, um einen Rand (6) des Stanzstücks (2) gegen die Aufnahmeoberfläche (20; 20') des Gesenks (16) zu verformen; und
    - einen Hilfspresser (38), der geeignet ist, um gegen die Aufnahmeoberfläche (20') einen distalen Abschnitt (52) des Rands (6) des Stanzstücks (2) zu pressen, bevor der Stempel (36) geeignet ist, den Rand (6) zu verformen, wobei der Hilfspresser (38) auf Feder in Verschiebung auf dem Stößel (26) bevorzugt in eine Richtung parallel zu der Gleitrichtung des Stößels (26) beweglich montiert ist,
    dadurch gekennzeichnet, dass der Hauptpresser (32) auf Feder auf dem oberen Gestell (30) beweglich montiert ist, wobei der Hauptpresser zu dem Stempel (36) benachbart und geeignet ist, um den Rand (6) des Stanzstücks (2) gegen einen zentralen und Hauptabschnitt (34) der Aufnahmeoberfläche (20; 20') des Gesenks zu pressen, bevor der Stempel (36), wie er zwischen dem Hilfspresser (38) und dem Hauptpresser (32) positioniert ist, geeignet ist, den Rand (6) zu verformen.
  2. Stanzwerkzeug (12) nach Anspruch 1, dadurch gekennzeichnet, dass der Hilfspresser (38) eine Pressfläche (39) mit einem unregelmäßigen Profil, bevorzugt einem gerippten Profil, umfasst.
  3. Stanzwerkzeug (12) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Aufnahmeoberfläche (20') im Allgemeinen länglich ist, wobei der Querschnitt der Oberfläche (20') ein im Allgemeinen gebogenes Profil aufweist, das bevorzugt eine Unterschnittrückführung (28) bildet.
  4. Stanzwerkzeug (12) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Abschnitt der Aufnahmeoberfläche (20'), der mit dem Stößel (26) zusammenwirkt, ein erstes konkaves Profil (40) umfasst, das mit dem Stößel (36) zusammenwirkt, und ein zweites Profil (42), das im Allgemeinen gerade ist, das mit dem Hilfspresser (38) zusammenwirkt.
  5. Stanzwerkzeug (12) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Aufnahmeoberfläche (20') durch zwei Gesenkelemente (22; 22'), die benachbart und in Verschiebung zueinander beweglich sind, gebildet ist.
  6. Stanzwerkzeug (12) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass es außerdem Folgendes umfasst:
    - ein erstes Gestell (14), das bevorzugt ein unteres ist, das das Gesenk (16) trägt;
    - ein zweites Gestell (30), das bevorzugt ein oberes ist, das den Stößel (26) trägt, der geeignet ist, mit dem Gesenk (16) durch Annähern zwischen dem ersten (14) und zweiten (30) Gestell zusammenzuwirken;
    wobei der Stößel (26) geeignet ist, bezüglich des Gesenks (16) in eine Richtung zu gleiten, die zu der Annäherungsrichtung des ersten (14) und zweiten (30) Gestells um einen Winkel zwischen 20° und 80° schräg ist, um den Rand (6) des Stanzstücks (2) zu verformen.
  7. Verfahren zum Formen eines Stanzstücks (2), insbesondere einer Kraftfahrzeugkarosserie, das im Allgemeinen länglich ist, wobei das Verfahren die folgenden Schritte umfasst:
    a) Aufnehmen eines im Allgemeinen länglichen Rands (6) des Stanzstücks (2) in einem Stanzwerkzeug in einer Tiefziehpresse (12);
    b) Verformen des Rands (6) des Stanzstücks (2);
    dadurch gekennzeichnet, dass das Werkzeug (12) einem der Ansprüche 1 bis 6 entspricht, wobei das Verfahren außerdem das Pressen mittels des Hilfspressers (38) des Rands (6) des Stanzstücks (2) vor und/oder während seiner Verformung umfasst.
EP15817981.2A 2015-01-06 2015-12-09 Werkzeug und verfahren zum formen einer kante eines stanzstückes mit unterschnittrückführung Active EP3242757B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1550070A FR3031322B1 (fr) 2015-01-06 2015-01-06 Mise a forme d’un bord d’embouti avec renvoi en contre-depouille
PCT/FR2015/053401 WO2016110621A1 (fr) 2015-01-06 2015-12-09 Outillage et procédé de mise a forme d'un bord d'embouti avec renvoi en contre-depouille

Publications (2)

Publication Number Publication Date
EP3242757A1 EP3242757A1 (de) 2017-11-15
EP3242757B1 true EP3242757B1 (de) 2019-03-27

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Application Number Title Priority Date Filing Date
EP15817981.2A Active EP3242757B1 (de) 2015-01-06 2015-12-09 Werkzeug und verfahren zum formen einer kante eines stanzstückes mit unterschnittrückführung

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Country Link
EP (1) EP3242757B1 (de)
CN (1) CN107107143B (de)
FR (1) FR3031322B1 (de)
WO (1) WO2016110621A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109794546A (zh) * 2019-01-04 2019-05-24 安徽汇精模具研发科技有限公司 冲压件挤压成型装置
CN109773054B (zh) * 2019-03-25 2020-12-29 广西艾盛创制科技有限公司 一种金属板料局部冲孔包边连接模具及其工作方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3351142B2 (ja) * 1994-12-14 2002-11-25 スズキ株式会社 プレス型装置
JP5014069B2 (ja) * 2007-11-06 2012-08-29 株式会社ユアビジネス プレス成形用金型
FR2924366B1 (fr) * 2007-11-30 2010-05-14 Peugeot Citroen Automobiles Sa Outil de presse d'emboutissage
JP2009148798A (ja) * 2007-12-20 2009-07-09 Kanto Auto Works Ltd ロータリーカム式プレス装置
FR2945971B1 (fr) * 2009-05-27 2011-05-13 Peugeot Citroen Automobiles Sa Procede d'emboutissage d'un element en tole, notamment de la caisse d'un vehicule automobile
FR3002746B1 (fr) * 2013-03-01 2015-03-20 Peugeot Citroen Automobiles Sa Outil de presse pour l'emboutissage d'une tole

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN107107143A (zh) 2017-08-29
FR3031322B1 (fr) 2017-01-13
EP3242757A1 (de) 2017-11-15
WO2016110621A1 (fr) 2016-07-14
FR3031322A1 (fr) 2016-07-08
CN107107143B (zh) 2020-03-10

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