EP1363752B1 - Outil de formage destine a l'emboutissage hydromecanique profond de pieces en tant que coupes de toles - Google Patents

Outil de formage destine a l'emboutissage hydromecanique profond de pieces en tant que coupes de toles Download PDF

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Publication number
EP1363752B1
EP1363752B1 EP02719899A EP02719899A EP1363752B1 EP 1363752 B1 EP1363752 B1 EP 1363752B1 EP 02719899 A EP02719899 A EP 02719899A EP 02719899 A EP02719899 A EP 02719899A EP 1363752 B1 EP1363752 B1 EP 1363752B1
Authority
EP
European Patent Office
Prior art keywords
sheet metal
ring
water box
insert
side walls
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 - Fee Related
Application number
EP02719899A
Other languages
German (de)
English (en)
Other versions
EP1363752A1 (fr
Inventor
Christian Donhauser
Wolfgang Rauh
Mathias Mangliers
Ali Kaya
Matthias Golle
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.)
Audi AG
Original Assignee
Audi 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 Audi AG filed Critical Audi AG
Publication of EP1363752A1 publication Critical patent/EP1363752A1/fr
Application granted granted Critical
Publication of EP1363752B1 publication Critical patent/EP1363752B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B21D22/20—Deep-drawing
    • B21D22/205—Hydro-mechanical deep-drawing
    • 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
    • Y10T29/49805—Shaping by direct application of fluent pressure

Definitions

  • the invention relates to a forming tool for the hydromechanical deep drawing of workpieces from sheet metal blanks according to the preamble of claim 1.
  • a well-known, generic forming tool (magazine “BLECH” No. 9/1963, page 575, Figure 7) consists essentially of a water tank, a drawing ring and a drawing punch and an operable hold-down.
  • the water tank is designed with box side walls and a box bottom as a tool trough, which can be filled as a lower tool with a liquid active medium and thereby forms the drawing die.
  • the drawing ring is designed plate-shaped and arranged in the upper part of the water box. With its ring area, it can be sealed off from an underlying effective medium volume. The edge of the ring opening of the drawing ring forms a drawing edge for the workpiece.
  • the drawing punch is movable by means of an adjustable plunger such that it can be displaced through the annular opening of the drawing ring into the region of the active medium with the interposition of the sheet metal blank.
  • the actuatable hold-down serves to hold the edges of the inserted Sheet metal blank, wherein the holding pressure is selected so that a Gleitmaschinekeit the Blechzu motherboardr selected consists in a load of the sheet metal section by the drawing punch.
  • the drawing ring with its ring area on the upper edge of the water tank side walls close to.
  • the hold-down presses the edge region of the sheet metal blank against a seal embedded in the draw ring and thus seals the system containing the effective medium to the outside.
  • the drawing punch penetrates with the interposition of the sheet metal blank in the active medium, usually a water-oil emulsion, whereby it is displaced by an adjustable throttle.
  • the resulting according to the throttle position reaction pressure causes a pressing of the sheet metal blank to the drawing punch, whereby the workpiece with a corresponding shape can be produced.
  • the drawing ring with its ring area lies on the water box side walls in such a way that it projects beyond the water box side walls to the center of the channel box only with a small free projection.
  • the situation is different in a production of a smaller workpiece using a drawing ring with a relatively small ring opening, wherein the same integrated water box is firmly used in the forming tool also here.
  • the ring area of the Ziehrings protrudes here with a wide projection from the supports on the water box side walls above the active medium to the center of the water tank.
  • the pressure in the active medium on the large overhang surface exerts a considerable force in the vertical direction upwards on the draw ring. This can lead both to permanent deformations of the drawing ring and / or to elastic deformations of the drawing ring during the shaping process in the manner of a "breathing", whereby the production quality and the reproducibility during workpiece production can be adversely and uncontrollably influenced.
  • the object of the invention is in contrast to develop a generic forming tool so that when using draw rings with respect to the water box surface relatively smaller ring openings deformation of the annular area during the forming process is largely prevented.
  • the forming tool comprises at least one adjustable in the tool integrated water tank water tank insert, which is fillable with the active medium while keeping the surrounding water tank volume.
  • the drawing ring used here lies with its annular area on the upper edge of the insert side walls tight, for which purpose preferably mounted a circumferential seal on the upper edge of the insert walls is.
  • the same forming tool while maintaining the tool-integrated, relatively large water box can also be used for the production of relatively small workpieces, without the problem of pressure-induced Ziehringverformung in the nature of a "breathing" with a reduction in manufacturing quality.
  • the proposed water tank insert is also easy and inexpensive to produce and adjustable when changing a drawing ring quickly and easily in the water box.
  • the water box insert is formed in a preferred embodiment according to claim 2 tubular with insert side walls, which are tightly placed over at least one circumferential lower edge wall seal on the water tank bottom. Connections for the active medium, which are mounted within the water box insert at the bottom of the water box, thus can continue to be used here according to a use of the entire water box.
  • the water box insert according to claim 3 can also be produced as a use container with its own insert bottom, then use container side connections are provided for the active medium.
  • the insert sidewalls have the same height as the box sidewalls of the forming tool integrated channel box.
  • all usable draw rings are at the same height level in the forming tool, so that essentially the tool settings can be maintained even with a draw ring exchange in connection with the use of a water box insert.
  • spacers are attached to adjacent inner sides of box walls of the water box on the outside of the insert side walls in such a way that the water box insert is positively adjustable in the water box.
  • the water tank insert used in each case is advantageously held immovably and in the same position in the water tank.
  • a universal plate holder is formed, which is adjustable from an open position to a holding position, wherein the bearing surfaces are arranged approximately above the water box sidewalls, since when using the entire water tank volume with a drawing ring large ring opening size there are to be held edges of the sheet metal section.
  • the hold-down comprises in addition to the universal plate holder an exchangeable plate holding ring whose ring opening corresponds approximately to that of the respective drawing ring.
  • the sheet metal retaining ring is detachably connected directly or indirectly with the universal sheet holder.
  • the travel and the holding force of the universal plate holder continue to the center of the water tank in the relevant area of the water tank insert and the relatively small ring opening of the current drawing redirected.
  • FIG. 4 schematically and by way of example shows a lower tool 106 as part of a forming tool 100 according to the prior art.
  • This lower tool 106 includes a water box 102 with box side walls 103, 104 and a box bottom 105, wherein the water box 102 with a liquid active medium 107, z.
  • a drawing ring 108 is here plate-shaped and arranged in the upper region of the water box 102. With its ring area it is sealed against an underlying medium volume. The edge of the ring opening of the drawing ring 108 forms a pulling edge for the workpiece 101.
  • a drawing punch is movable by means of an adjustable plunger, likewise not shown here, in that way, with the interposition of the workpiece 101, through an annular opening 109 of the drawing ring 108 the active medium 107 can be displaced.
  • the drawing punch penetrates with the interposition of the workpiece 101 as a sheet metal blank in the active medium 107, whereby it is displaced via an adjustable throttle, not shown here.
  • the resulting according to the throttle position reaction pressure then causes a pressing of the sheet metal blank to the drawing punch, whereby the workpiece can be made with appropriate shape.
  • the workpiece 101 is formed relatively small, so that the ring opening 109th of the drawing ring 108 is also relatively small. As can be further seen from FIG.
  • the drawing ring 108 protrudes with a broad projection 110 from the supports on the water box sidewalls 103, 104 over the active medium 107 toward the center of the water box.
  • the pressure represented by the arrows 111 in the active medium 107 exerts on the large overhang surface 110 a considerable force in the vertical direction upwards on the pull ring 108. This can lead to an inhalation of the drawing ring 108 during the forming process, as a result of which the manufacturing quality and the reproducibility during the production of the workpiece are adversely and uncontrollably influenced.
  • the present invention proposes a forming tool 1 with which the above problems can be avoided.
  • the forming tool 1 for hydromechanical deep drawing of a workpiece 2 from a sheet metal blank comprises a water tank 3 with box side walls 4, 5 and a box bottom 6, which can be filled as a lower tool 7 with a liquid active medium 8 and thereby the Drawing die forms.
  • this forming tool 1 comprises a drawing punch 9 which can be moved by means of an adjustable plunger, not shown here, which can be displaced into the region of the active medium 8 through an annular opening 11 of a drawing ring 10 with the interposition of the sheet metal blank 2.
  • an operable hold-down 12 is provided for holding the edges of the reshaped sheet metal blank 2 with a sliding possibility at a load by the drawing punch 9 permitting holding pressure.
  • a water box insert 14 is set in the water tank 3, which can be filled with the active medium 8 while keeping the remaining volume of water tank free.
  • the water tank 3 is shown with water box insert 14 in a schematic and perspective plan view. It can be seen that the water box insert 14 is tubular. 1, the water box insert side walls 15, 16 are placed on the water box bottom 6 via a peripheral bottom edge seal 17, which is only shown here extremely schematically. The height of the insert side walls 15, 16 corresponds to the height of the box side walls 4, 5.
  • spacers 21, 22, 23, 24 to the adjacent inner sides of the box side walls 4, 5, 25, 26 are on the outside of the insert side walls 15, 16, 19, 20 of the water box insert 14 attached that the water box insert 14 can be adjusted positively in the water tank 3.
  • the drawing ring 10 lies with its annular area on the upper edge of the insert side walls 15, 16 tight, wherein a seal via an upper wall edge seal 27, which is formed circumferentially, as shown in FIG is shown only very schematically and by way of example takes place.
  • FIG. 1 A comparison of FIG. 1 with FIG. 4 of the prior art shows that the free supernatant of a ring area in a drawing ring 10 with a small annular opening 11 is considerably reduced by the inventive water box insert 14, so that thus the pressure in the active medium 8 at Forming process can cause only a small force in the direction of a "breathing" of the drawing ring 10.
  • the hold-down device 12 consists in each case of a universal plate holder 28 and of an exchangeable plate holding ring 30 whose annular opening 31 corresponds approximately to that of the associated drawing ring 10 and which with its ring area directly to the universal plate holder 28 is releasably connected.
  • an inelastic and / or elastic deformation of the sheet-metal retaining ring 30 can occur in that the holding force of the universal sheet-metal holder 28 is radial far outside of the sheet holder ring 30 engages and the support force at the edge of the blank 2 on the drawing ring 10 radially further inward.
  • a stable pick-up ring 35 is inserted between the universal sheet metal holders 28 and a sheet-metal holding ring 34, wherein the sheet-metal holding ring 34 is releasably connected to the pick-up ring 35.
  • An annular opening 36 of the Auf investigatingrings 35 is here approximately as large as that of the sheet metal holding ring 34 and covers this, that is, immediately above the ring opening 11 of the drawing ring 10 is arranged.
  • the stable pickup ring 35 is detachably connected at its ring side regions with the universal sheet holders 28. With such a structure, the forces occurring in the hold-down 12, 13 are thus absorbed substantially in the stable pick-up ring 35 without deformation.

Landscapes

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

Claims (7)

  1. Outil de formage (1) pour l'emboutissage profond hydromécanique de pièces (2) en tant que coupes de tôles,
    avec un caisson à eau (3) comportant des parois latérales de caisson (4, 5) et un fond de caisson (6) servant de bac à outillage qui, en tant qu'élément inférieur de l'outil (7), peut être rempli d'un fluide actif liquide (8) en formant ainsi la matrice d'emboutissage,
    avec une bague d'emboutissage en forme de plaque (10) qui est disposée dans la zone supérieure du caisson à eau (3) et qui peut être rendue étanche avec sa zone annulaire par rapport à un volume de fluide actif situé au-dessous, alors que le bord de l'ouverture annulaire (11) forme un bord d'emboutissage pour la pièce (2),
    avec un poinçon d'emboutissage (9) qui, alors que la coupe de tôle est intercalée, peut être déplacé à l'aide d'un poussoir mobile à travers l'ouverture annulaire (11) de la bague d'emboutissage (10) jusque dans la zone du fluide actif (8), la coupe de tôle pouvant, par un refoulement ciblé du fluide actif (8), être soumise à une pression de réaction en tant que pression de serrage agissant sur le poinçon d'emboutissage (9),
    et avec un dispositif presse-tôle (12) pouvant être actionné pour maintenir les bords de la coupe de tôle à mettre en forme avec une pression de maintien permettant une possibilité de glissement sous l'effet de la charge appliquée par le poinçon d'emboutissage (9),
    caractérisé en ce que, dans le caisson à eau (3), peut être introduit un insert (14) pour le caisson à eau qui peut être rempli de fluide actif (8) tout en laissant libre le reste du volume du caisson à eau et en ce que la bague d'emboutissage (10) repose de manière étanche avec sa zone annulaire sur le bord supérieur des parois latérales de l'insert (15, 16, 19, 20).
  2. Outil de formage selon la revendication 1, caractérisé en ce que l'insert du caisson à eau (14) est configuré en forme de tube avec des parois latérales d'insert (15, 16, 19, 20) qui peuvent être placées par l'intermédiaire d'au moins un joint inférieur circulaire de bords de parois (17) sur le fond du caisson à eau (6).
  3. Outil de formage selon la revendication 1, caractérisé en ce que l'insert du caisson à eau peut être placé dans le caisson à eau en tant que conteneur d'insert avec des parois latérales d'insert et un fond d'insert.
  4. Outil de formage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la hauteur des parois latérales de l'insert (15, 16, 19, 20) correspond à la hauteur des parois latérales du caisson (4, 5, 25, 26).
  5. Outil de formage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que, sur le côté extérieur des parois latérales de l'insert (15, 16, 19, 20) sont placés des éléments de maintien d'espacement (21, 22, 23, 24) par rapport à des côtés intérieurs voisins des parois du caisson (4, 5, 25, 26), et ceci de telle façon que l'insert du caisson à eau (14) puisse être placé en complémentarité de forme et de manière reproductible dans la même position dans le caisson à eau (3).
  6. Outil de formage selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le dispositif presse-tôle (12) se compose d'un élément de maintien universel de la tôle (28) qui est disposé de manière réglable à peu près au-dessus des parois latérales du caisson (4, 5) et en ce que le dispositif presse-tôle (12) comprend une bague de maintien de la tôle interchangeable (30 ; 34) dont l'ouverture annulaire (31 ; 36) correspond à peu près à celle de la bague d'emboutissage respective (10) et qui est reliée avec sa zone annulaire directement ou indirectement de manière amovible avec l'élément de maintien universel de la tôle (28).
  7. Outil de formage selon la revendication 6, caractérisé en ce qu'entre l'élément de maintien universel de la tôle (28) et la bague de maintien de la tôle (34) est placée une solide bague réceptrice (35) et que la bague de maintien de la tôle (34) est relié de manière amovible avec la bague réceptrice (35), une ouverture annulaire (31) de la bague réceptrice (35) étant au moins aussi grande que celle de la bague de maintien de la tôle (34) et recouvre celle-ci, et en ce que dans ses zones latérales de bague la bague réceptrice (35) est reliée de manière amovible avec l'élément de maintien universel de la tôle (28).
EP02719899A 2001-03-02 2002-02-22 Outil de formage destine a l'emboutissage hydromecanique profond de pieces en tant que coupes de toles Expired - Fee Related EP1363752B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10110161A DE10110161A1 (de) 2001-03-02 2001-03-02 Umformwerkzeug zum hydromechanischen Tiefziehen von Werkstücken aus Blechzuschnitten
DE10110161 2001-03-02
PCT/EP2002/001894 WO2002070163A1 (fr) 2001-03-02 2002-02-22 Outil de formage destine a l'emboutissage hydromecanique profond de pieces en tant que coupes de toles

Publications (2)

Publication Number Publication Date
EP1363752A1 EP1363752A1 (fr) 2003-11-26
EP1363752B1 true EP1363752B1 (fr) 2006-09-13

Family

ID=7676121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02719899A Expired - Fee Related EP1363752B1 (fr) 2001-03-02 2002-02-22 Outil de formage destine a l'emboutissage hydromecanique profond de pieces en tant que coupes de toles

Country Status (6)

Country Link
US (1) US7007531B2 (fr)
EP (1) EP1363752B1 (fr)
JP (1) JP2004520938A (fr)
DE (2) DE10110161A1 (fr)
ES (1) ES2268008T3 (fr)
WO (1) WO2002070163A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8534106B2 (en) * 2009-10-19 2013-09-17 Ford Global Technologies, Llc Hydromechanical drawing process and machine
US9044801B2 (en) 2013-10-21 2015-06-02 Ford Global Technologies, Llc Deep draw manufacturing process
WO2015126401A1 (fr) * 2014-02-20 2015-08-27 Silgan Containers Llc Station d'expansion de fond
EP3352976A1 (fr) 2015-09-23 2018-08-01 Day International, Inc. Tapis de coupe et leurs procédés de fabrication

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE416520C (de) 1923-03-15 1925-07-16 Lignose Ag Schrotpatrone
DE1279615B (de) * 1961-07-07 1968-10-10 Siemens Elektrogeraete Gmbh Vorrichtung zum hydraulischen Tiefziehen
DE1552070B2 (de) 1966-02-25 1970-05-27 SMG Süddeutsche Maschinenbau-Gesellschaft mbH, 6835 Wiesental Vorrichtung zum hydromechanisehen Tiefziehen
DE1777153C3 (de) * 1968-09-12 1974-05-09 Siemens-Electrogeraete Gmbh, 1000 Berlin U. 8000 Muenchen Vorrichtung zum hydromechanischen Tiefziehen
US3769824A (en) * 1972-06-14 1973-11-06 Armco Steel Corp Deep drawing method
FR2443888A1 (fr) * 1978-12-11 1980-07-11 Pechiney Aluminium Emboutissage en matrice liquide
US5271142A (en) * 1991-05-09 1993-12-21 Soundwich, Inc. Method for producing a sound-dampened automotive enclosure
DE19845186A1 (de) * 1998-10-01 2000-04-13 Binder Technologie Ag Gams Fluidform
DE19928422A1 (de) * 1999-06-23 2000-12-28 Mueller Weingarten Maschf Presse zum Außenhochdruckformen
DE19939504A1 (de) * 1999-08-20 2001-03-08 Konrad Schnupp Verfahren zur Betätigung einer Umformpresse
US6631630B1 (en) * 2000-09-22 2003-10-14 Board Of Trustees Of Michigan State University Hydroforming of composite materials

Also Published As

Publication number Publication date
WO2002070163A1 (fr) 2002-09-12
DE50208136D1 (de) 2006-10-26
ES2268008T3 (es) 2007-03-16
US20040074274A1 (en) 2004-04-22
EP1363752A1 (fr) 2003-11-26
US7007531B2 (en) 2006-03-07
JP2004520938A (ja) 2004-07-15
DE10110161A1 (de) 2003-01-02

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