EP1363752A1 - 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

Info

Publication number
EP1363752A1
EP1363752A1 EP02719899A EP02719899A EP1363752A1 EP 1363752 A1 EP1363752 A1 EP 1363752A1 EP 02719899 A EP02719899 A EP 02719899A EP 02719899 A EP02719899 A EP 02719899A EP 1363752 A1 EP1363752 A1 EP 1363752A1
Authority
EP
European Patent Office
Prior art keywords
ring
sheet metal
insert
water box
active medium
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
EP02719899A
Other languages
German (de)
English (en)
Other versions
EP1363752B1 (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 - Lifetime 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
    • 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 HV-mechanical deep drawing of workpieces from sheet metal blanks according to the preamble of claim 1.
  • a known, generic forming tool (magazine “BLECH” No. 9/1963, page 575, picture 7) essentially consists of a water box, a drawing ring and a drawing punch and an actuatable hold-down device.
  • the water box is designed with box side walls and a box bottom as a tool trough, which can be filled with a liquid active medium as the lower tool and thereby forms the drawing die.
  • the drawing is plate-shaped and arranged in the upper area of the water tank. With its ring area, it can be sealed against an underlying active medium volume. The edge of the ring opening of the drawing ring forms a drawing edge for the workpiece.
  • the drawing punch can be moved by means of an adjustable plunger such that it can be displaced through the ring opening of the drawing ring into the region of the active medium with the interposition of the sheet metal blank.
  • the actuatable hold-down is used to hold the edges of the inserted Sheet metal blank, the holding pressure being selected such that the sheet metal blank edges can slide when the sheet metal cutout is loaded by the drawing die.
  • the drawing ring with its ring area lies close to the upper edge of the water tank side walls.
  • the hold-down presses the edge area of the sheet metal blank against a seal embedded in the drawing ring and thus seals the system containing the active medium to the outside.
  • the drawing punch penetrates the active medium, usually a water-oil emulsion, with the interposition of the sheet metal blank, as a result of which this is displaced via an adjustable throttle.
  • the reaction pressure resulting from the throttle position causes the sheet metal blank to be pressed against the drawing die, as a result of which the workpiece can be produced with the appropriate shape.
  • the drawing ring rests with its ring area on the water box side walls in such a way that it projects beyond the water box side walls towards the center of the water box only with a small free projection.
  • this exerts pressure from below on this free projection, which, however, is easy to control due to the small projection width and does not lead to any noticeable deformation of the drawing ring.
  • the situation is different when a smaller workpiece is produced using a drawing ring with a relatively small ring opening, the same water box firmly integrated in the forming tool also being used here.
  • the ring area of the Ziehrings protrudes here with a wide overhang from the supports on the water box side walls over the active medium to the center of the water box. Therefore, during the forming process, the pressure in the active medium exerts a considerable force in the vertical direction upwards on the drawing ring. This can lead to permanent deformations of the drawing ring and / or to elastic deformations of the drawing ring during the forming process in the manner of a "sigh of relief", as a result of which the manufacturing quality and the reproducibility during workpiece production can be influenced in an unfavorable and uncontrolled manner.
  • the object of the invention is to develop a generic forming tool such that when using drawing rings with relatively smaller ring openings than the water box surface, deformation of the ring area during the forming process is largely prevented.
  • the forming tool comprises at least one water box insert which is adjustable in the tool-integrated water box and which can be filled with active medium while keeping the surrounding water box volume free.
  • the ring used for the drawing ring lies tightly on the upper edge of the insert side walls, a circumferential seal preferably being attached to the upper edge of the insert walls. is brought.
  • the same forming tool can thus advantageously also be used for the production of relatively small workpieces, while maintaining the tool-integrated, relatively large water box, without the problem of a drawing-related deformation of the drawing ring in the manner of "breathing” with a reduction in the manufacturing quality.
  • the proposed water box insert is also easy and inexpensive to manufacture and can be quickly and easily set in the water tank when changing a drawing ring.
  • the water box insert is tubular with insert side walls which can be placed tightly on the water box bottom via at least one circumferential lower wall edge seal. Connections for the active medium, which are attached to the bottom of the water box within the water box insert, can therefore continue to be used here in accordance with a use of the entire water box.
  • the water box insert can also be produced as an insert container with its own insert base, in which case connections for the active medium are to be provided on the insert container side.
  • the insert side walls have the same height as the box side walls of the water box integrated in the forming tool. This means that all the pull rings that can be used are at the same height level in the forming tool, so that the tool settings can essentially be retained even when the pull ring is replaced in conjunction with the use of a water box insert.
  • spacers to adjacent inner sides of the box walls of the water tank are attached to the outside of the insert side walls in such a way that the water box insert can be positively adjusted in the water tank. This advantageously keeps the water box insert used immovable and in the same position in the water box.
  • a universal sheet metal holder is formed on the forming tool, which can be adjusted from an open position to a holding position, the bearing surfaces being arranged approximately above the water box side walls, since when using the entire water box volume with a drawing ring of a large ring opening size, the edges of the sheet metal cutout to be held there.
  • the edges of a correspondingly smaller sheet metal blank to be held by the hold-down device can be seen further towards the center of the water box.
  • the hold-down device comprises, in addition to the universal sheet metal holder, an exchangeable sheet metal holding ring whose ring opening corresponds approximately to that of the respective drawing ring.
  • the sheet metal ring is directly or indirectly detachably connected to the universal sheet metal holder. The travel range and the holding force of the universal sheet metal holder are thus extended further towards the center of the water tank in the relevant area of the water tank insert and redirected to the relatively small ring opening of the current drawing ring.
  • claim 7 proposes to releasably connect the respective sheet metal holding ring to a stable pickup ring, the ring opening of the pickup ring being at least as large as that of the sheet metal holding ring.
  • the stable pick-up ring is detachably connected to the universal sheet metal holder on its ring side areas. The forces occurring in the hold-down device are thus absorbed essentially in the stable sensor ring without deformation.
  • the pick-up ring can be used as a further universal component to which different sheet metal holding rings can be detachably connected. Only when a drawing ring opening larger than the ring opening of the transducer ring is required, should this also be changed.
  • 1 shows a schematic representation of a forming tool according to the invention for hydromechanical deep drawing of workpieces from sheet metal blanks according to a first embodiment
  • 2 shows a schematic illustration of a forming tool according to the invention for hydromechanical deep drawing of workpieces from sheet metal blanks according to an alternative embodiment
  • Fig. 3 is a schematic, perspective top view of a water box insert
  • FIG. 4 shows a schematic representation of a partial area of a forming tool for hydromechanical deep drawing of workpieces from sheet metal blanks according to the prior art.
  • 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 comprises a water box 102 with box side walls 103, 104 and a box bottom 105, the water box 102 containing a liquid active medium 107, e.g. B. a water-oil emulsion, is filled and thereby forms the drawing die.
  • a pull ring 108 is designed here in the form of a plate and is arranged in the upper region of the water box 102. With its ring area, it is sealed against an active medium volume underneath. The edge of the ring opening of the drawing ring 108 forms a drawing edge for the workpiece 101.
  • a drawing punch can be moved by means of an adjustable plunger, also not shown here, in such a way that, with the interposition of the workpiece 101, it passes through a ring opening 109 of the drawing ring 108 into the area of the active medium 107 can be shifted.
  • the drawing punch with the interposition of the workpiece 101, penetrates into the active medium 107 as a sheet metal blank, as a result of which this is displaced via an adjustable throttle, not shown here.
  • the reaction pressure resulting from the throttle position then causes the sheet metal blank to be pressed against the drawing die, as a result of which the workpiece can be produced with the appropriate shape.
  • the workpiece 101 is made relatively small, so that the ring opening 109 of the drawing ring 108 is also made relatively small.
  • the drawing ring 108 projects with a wide protrusion 110 from the supports on the water box side walls 103, 104 over the active medium 107 to the center of the water box.
  • the pressure in the active medium 107 represented by the arrows 111 exerts a considerable force in the vertical direction upwards on the drawing ring 108. This can lead to the drawing ring 108 breathing out during the shaping process, as a result of which the manufacturing quality and the reproducibility in the manufacture of the workpiece are adversely affected in an uncontrolled manner.
  • the present invention proposes a forming tool 1 with which the above problems can be avoided.
  • the forming tool 1 for the hydromechanical deep drawing of a workpiece 2 from a sheet metal blank comprises a water box 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 Drawing die forms.
  • this forming tool 1 comprises a drawing die 9 which can be moved by means of an adjustable plunger (not shown here) and which, with the interposition of the sheet metal blank 2, can be displaced through an annular opening 11 of a drawing ring 10 into the region of the active medium 8.
  • an actuatable hold-down device 12 is provided for holding the edges of the sheet metal blank 2 to be formed with a holding pressure that allows a sliding possibility when the pulling die 9 is loaded.
  • a water box insert 14 is set in the water box 3, which can be filled with the active medium 8 while keeping the remaining water box volume free.
  • 3 shows the water tank 3 with the water tank insert 14 in a schematic and perspective top view. It can be seen from this that the water box insert 14 is tubular.
  • the water box insert side walls 15, 16 are placed on the water box floor 6 via a circumferential lower wall edge seal 17, which is only shown here very schematically. The height of the insert side walls 15, 16 corresponds to the height of the box side walls 4, 5.
  • FIG. 1 the drawing ring 10 lies tightly with its ring region on the upper edge of the insert side walls 15, 16, a seal being provided by an upper wall edge seal 27 which is formed all the way around, as shown in FIG 1 is shown only very schematically and by way of example.
  • FIG. 1 A comparison of FIG. 1 with FIG. 4 of the prior art shows that the free protrusion of a ring area in a drawing ring 10 with a small ring opening 11 is considerably reduced by the water box insert 14 according to the invention, so that the pressure in the active medium 8 when Forming process can only cause a small force effect in the direction of a "breathing" of the drawing ring 10.
  • the hold-down device 12 consists in each case of a universal sheet metal holder 28 and of an exchangeable sheet metal holding ring 30, the ring opening 31 of which corresponds approximately to that of the associated drawing ring 10 and the ring area of which directly connects to the uni Versal sheet holder 28 is releasably connected.
  • an inelastic and / or elastic deformation of the sheet metal holding ring 30 can occur in a structure according to FIG. 1 in that the holding force of the universal sheet metal holder 28 engages radially far outside on the sheet metal holding ring 30 and the supporting force on the edge of the sheet metal blank 2 on the drawing ring 10 lies radially further inside.
  • a stable pickup ring 35 is inserted between the universal sheet metal holders 28 and a sheet metal holding ring 34, the sheet metal holding ring 34 being detachably connected to the pickup ring 35.
  • a ring opening 36 of the pick-up ring 35 is approximately as large as that of the sheet metal holding ring 34 and covers it, that is to say is arranged directly above the ring opening 11 of the drawing ring 10.
  • the stable pickup ring 35 is detachably connected to the universal sheet metal holders 28 on its ring side regions. With such a structure, the forces occurring in the hold-down device 12, 13 are thus absorbed essentially 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)

Abstract

L'invention concerne un outil de formage (1) destiné à l'emboutissage hydromécanique profond de pièces en tant que coupes de tôles (2), comportant un réservoir d'eau (3) pouvant être rempli d'un milieu liquide actif (8) en tant qu'outil support, ledit réservoir d'eau constituant ainsi la matrice d'emboutissage. L'outil de formage selon l'invention comporte par ailleurs un anneau d'emboutissage (10) logé dans la partie supérieure du réservoir d'eau (3) et étanchéifié par rapport à un volume de milieu actif situé en dessous. Le bord de l'ouverture annulaire (11) de l'anneau d'emboutissage (10) constitue une arête d'emboutissage pour la pièce (2). L'outil de formage selon l'invention comporte par ailleurs un poinçon d'emboutissage (9) pouvant être déplacé au moyen d'un poussoir réglable, ledit poinçon pouvant être déplacé par montage intermédiaire de la coupe de tôle, dans la zone du milieu actif (8), au travers de l'ouverture annulaire (11) de l'anneau d'emboutissage (10). Un déplacement ciblé du milieu actif (8) permet d'appliquer une pression de réaction sur la coupe de tôle en tant que pression de compression sur le poinçon d'emboutissage. Selon l'invention, le réservoir d'eau (3) peut recevoir un insert de réservoir d'eau (14) pouvant être rempli de milieu actif (8) avec conservation du volume de réservoir d'eau restant, l'anneau d'emboutissage (10) s'appuyant fixement sur le bord supérieur des parois latérales d'insert (15, 16, 19, 20) avec sa zone annulaire.
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 - Lifetime 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 true EP1363752A1 (fr) 2003-11-26
EP1363752B1 EP1363752B1 (fr) 2006-09-13

Family

ID=7676121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02719899A Expired - Lifetime 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
WO2017053521A1 (fr) 2015-09-23 2017-03-30 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02070163A1 *

Also Published As

Publication number Publication date
ES2268008T3 (es) 2007-03-16
US7007531B2 (en) 2006-03-07
WO2002070163A1 (fr) 2002-09-12
DE50208136D1 (de) 2006-10-26
US20040074274A1 (en) 2004-04-22
JP2004520938A (ja) 2004-07-15
DE10110161A1 (de) 2003-01-02
EP1363752B1 (fr) 2006-09-13

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