EP1016473B1 - Procédé et dispositif pour former des ébauches - Google Patents

Procédé et dispositif pour former des ébauches Download PDF

Info

Publication number
EP1016473B1
EP1016473B1 EP99125004A EP99125004A EP1016473B1 EP 1016473 B1 EP1016473 B1 EP 1016473B1 EP 99125004 A EP99125004 A EP 99125004A EP 99125004 A EP99125004 A EP 99125004A EP 1016473 B1 EP1016473 B1 EP 1016473B1
Authority
EP
European Patent Office
Prior art keywords
expansion
expansion elements
edge
tool
workpiece
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 - Lifetime
Application number
EP99125004A
Other languages
German (de)
English (en)
Other versions
EP1016473A3 (fr
EP1016473A2 (fr
Inventor
Lonka Bürgel
Frank Schieck
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.)
KUKA Systems GmbH
Original Assignee
KUKA Werkzeugbau Schwarzenberg GmbH
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 KUKA Werkzeugbau Schwarzenberg GmbH filed Critical KUKA Werkzeugbau Schwarzenberg GmbH
Publication of EP1016473A2 publication Critical patent/EP1016473A2/fr
Publication of EP1016473A3 publication Critical patent/EP1016473A3/fr
Application granted granted Critical
Publication of EP1016473B1 publication Critical patent/EP1016473B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D22/10—Stamping using yieldable or resilient pads
    • B21D22/12—Stamping using yieldable or resilient pads using enclosed flexible chambers
    • 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 method for molding Molded parts or a device for performing this method (see e.g. U.S.-A-4,829,803).
  • the invention is therefore based on the object of a method and to create a device by means of which a reforming of molded parts in critical edge and Corner areas can be done.
  • the stated object is achieved with a Process of the type mentioned solved in which a Reshaping preformed parts only in Edge and corner area using high-pressure liquid he follows.
  • An apparatus for molding molded parts is characterized by a to solve the problem Mold part with in its edge and corner areas concave expansion spaces, directly or indirectly are pressurized with high liquid pressure.
  • a preferred embodiment of the invention is characterized in that only at edge and corner areas of a mold part trained expansion rooms with high-pressure liquid be acted upon, particularly in recessed Edge and corner areas of a mold part (mold insert) in areas of the molded part to be deformed adjacent, closed expansion elements with high-pressure liquid be charged.
  • the expansion rooms the corresponding tool part, which is a mold insert, or a lower or upper part of a tool can, as far as such, by convex formations of such concave areas facing them of the workpiece or molded part, can be directly exposed to high liquid pressure become.
  • edges and Corner areas of a preformed workpiece or preformed molded part local radii under high liquid pressure be reshaped. Due to the small projection area with liquid pressurization only in edge and corner areas, with the transverse dimensions of the exposed areas only a few millimeters can be with low forces, especially low Pressing and closing forces are worked. Thereby, that with the high pressure liquid too filling expansion rooms compared to the usual very much when filling rooms with internal high pressure are small, is a quick filling of the above Expansion spaces possible in the edge and corner areas, so that short process times for the invention Postforming can be achieved.
  • the invention is particularly applicable to a Tool for hydroforming with an intermediate Lower and upper part of the tool provided spacer ring, wherein at least in one of the tool parts and the latter a workpiece is formed and the liquid supply line to deform the workpiece by the Spacer ring is made, as in the parallel patent application "Method and device for hydraulic Forming a workpiece "described by the applicant whose content is completely the subject of this Revelation is made.
  • the Spacer ring removed after preforming the workpiece and a trained in the manner according to the invention
  • the mold insert is positioned in the tool. and top part from the first hydroforming phase used for post-forming without modification can be.
  • the mold insert is a complete one or partial shape memory of the sheet metal part geometry, the one to be reshaped or calibrated Edge and corner areas, if necessary, the expansion elements mentioned having.
  • the expansion of the expansion elements is achieved through the form fit of the insert, i.e. the the Limiting expansion spaces that accommodate expansion elements and walls of the insert acting as a repository limited.
  • FIG. 1 shows a lower tool part of a molding tool for forming workpieces using high-pressure liquid, that on the concave side of the one shown Workpiece 2 has acted.
  • the illustrated Workpiece 2 can be used together with another Workpiece of the same or a different shape, which in pressed in the die shape of an upper part of the tool was where the high pressure between the two Workpieces were exercised, be formed according to the Procedure according to DE 197 28 276 or DE 195 35 870, wherein if necessary, a spacer ring between the two workpieces, through which the filling pressure is passed.
  • the workpiece 2 can also be formed alone a tool upper part is necessary, but this can have any shape.
  • the expansion elements Depending on the complexity of the edges and the size of the degree of deformation of the areas to be reshaped also be deformable metal hoses or pipes that either only deformed in their elasticity range become - the cross-sectional diameter of the expansion elements 9 may well be low - or plastic Deformation can also be lost expansion elements can.
  • the expansion elements 9 are on one in the tool to use 8 leading liquid high pressure line connected, the pressure generation in the at Internal high pressure forming is carried out in the usual way.
  • the Tool lower part 1 is a part of a hydroforming tool is after preforming the workpiece 2 by hydroforming the tool and if necessary, the surrounding separate pressure housing is opened, whereby, as far as two workpieces were formed, the upper one Molding is lifted with. Then the mold insert 6 used or between the two mold parts and accordingly the two tool parts swung in this is shown in Figure 2. Then will the tool and any surrounding pressure housing closed. Then liquid is injected under high pressure the expansion rooms 8, more precisely in the illustrated embodiment introduced into the expansion elements 9. These then do not stretch from the mold insert 6 supported area against those adjacent to them Edge areas 3, 4, 5 of workpiece 2 and press these into the edges and corners of the tool part, here the Lower part of the tool 1.
  • the shaping of the edges and corners 3 to 5 of a preformed workpiece 2 also in one separate from the preforming tool with the lower tool part 1 and the mold insert 6 respectively.
  • the empty tool Tool lower part 1
  • the mold insert 6 is retracted.
  • there is a separate upper part of the tool no longer necessary and as far as closed Expansion elements 9 is worked, also not a separate one Pressure housing.
  • Figures 1 and 2 While in Figures 1 and 2 the definition of the expansion elements 9 on the mold part or mold insert 6 not shown in detail and the expansion elements in principle also as can be seen in the existing recesses of the mold insert 6 can be shown the configurations of Figures 3 to 6 measures Definition of the expansion elements on a mold part or mold insert 6.
  • the mold insert 6 has a partially circular cross section Groove 11 with undercuts 12, 13 in the the expansion element designed as "8" in cross section with its upper part (in the drawing) positively is inserted, there are two pressurizable cavities 14, 15 provided, which are separated by a web 16 are.
  • the cavity 15 could also be fully elastic Material be formed. Alternatively, the web 16 omitted, so that the cavities 14, 15 merge.
  • a Part of the expansion element 9 also has a groove 11 Undercuts 12, 13 are provided in the direction of insertion conical bevels 17 of a holding area of the expansion element 9 of the positive Intervene.
  • the groove 11 is without Undercut formed.
  • the expansion element is glued to the bottom of the groove by means of adhesive 23 and is thereby held in a frictional manner.
  • this could also be level ground be part-circular.
  • a combination the fastening techniques of Figures 3 to 5 on the one hand (positive) and Figure 6 on the other hand (non-positive) can be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Claims (13)

  1. Procédé de conformation de pièces moulées (2) caractérisé par un postformage de pièces préformées exclusivement dans les zones (7) d'arêtes et de coins, par une haute pression d'un liquide.
  2. Procédé selon la revendication 1, caractérisé en ce que seuls des espaces d'expansion (8) conformés dans des zones (7) d'arêtes et de coins d'une pièce de moule (6) sont soumis à une haute pression d'un liquide.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que des éléments d'expansion (9) fermés, situés dans des zones (7) évidées d'arêtes et de coins d'une pièce de moule (6) et adjacents à des zones de la pièce moulée (2) à former, sont soumis à une haute pression d'un liquide.
  4. Dispositif de formage de pièces moulées (2), caractérisé par une pièce de moule (6) présentant dans ses zones (7) d'arêtes et de coins des espaces d'expansion (8) conformés concaves, pouvant être soumis directement ou indirectement à une haute pression d'un liquide.
  5. Dispositif selon la revendication 4, caractérisé par des éléments d'expansion (9) fermés, disposés dans les espaces d'expansion (8).
  6. Dispositif selon la revendication 5, caractérisé en ce que les éléments d'expansion sont conformés en tuyaux flexibles.
  7. Dispositif selon la revendication 5 ou 6, caractérisé en ce que les éléments d'expansion (9) sont réalisés en un matériau polymère flexible à haute capacité de charge.
  8. Dispositif selon la revendication 4 ou 5, caractérisé en ce que les éléments d'expansion (9) sont réalisés en métal.
  9. Dispositif selon l'une quelconque des revendications 4 à 8, caractérisé en ce que les éléments d'expansion (9) sont fixés dans des aligneurs de la pièce de moule (6).
  10. Dispositif selon la revendication 9, caractérisé en ce que les éléments d'expansion (9) sont maintenus par ajustement serré.
  11. Dispositif selon la revendication 9, caractérisé en ce que les éléments d'expansion sont maintenus par ajustement de forme.
  12. Dispositif selon la revendication 9 ou 11, caractérisé en ce que les éléments d'expansion sont maintenus dans des rainures (11) présentant des contre-dépouilles (12,13).
  13. Dispositif selon la revendication 9 ou 11, caractérisé en ce que les éléments d'expansion (9) sont maintenus par des plaques de maintien (22) fixées sur l'outil de formage (6) qui les recouvrent partiellement.
EP99125004A 1998-12-31 1999-12-15 Procédé et dispositif pour former des ébauches Expired - Lifetime EP1016473B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19860851 1998-12-31
DE19860851A DE19860851A1 (de) 1998-12-31 1998-12-31 Verfahren und Vorrichtung zum Formen von Formteilen

Publications (3)

Publication Number Publication Date
EP1016473A2 EP1016473A2 (fr) 2000-07-05
EP1016473A3 EP1016473A3 (fr) 2001-05-02
EP1016473B1 true EP1016473B1 (fr) 2004-04-07

Family

ID=7893201

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99125004A Expired - Lifetime EP1016473B1 (fr) 1998-12-31 1999-12-15 Procédé et dispositif pour former des ébauches

Country Status (6)

Country Link
US (1) US6308545B2 (fr)
EP (1) EP1016473B1 (fr)
AT (1) ATE263641T1 (fr)
DE (2) DE19860851A1 (fr)
DK (1) DK1016473T3 (fr)
ES (1) ES2216426T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2814387B1 (fr) * 2000-09-26 2002-12-06 Aerospatiale Matra Airbus Procede d'hydroformage de toles et dispositif pour sa mise en oeuvre
US7726165B2 (en) * 2006-05-16 2010-06-01 Alcoa Inc. Manufacturing process to produce a necked container
US7934410B2 (en) * 2006-06-26 2011-05-03 Alcoa Inc. Expanding die and method of shaping containers
PL2605873T3 (pl) 2010-08-20 2022-04-11 Kaiser Aluminum Warrick, Llc Ukształtowany pojemnik metalowy i sposób jego wytwarzania
US9327338B2 (en) 2012-12-20 2016-05-03 Alcoa Inc. Knockout for use while necking a metal container, die system for necking a metal container and method of necking a metal container

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2997093A (en) * 1958-01-10 1961-08-22 Keelavite Co Ltd Pumps
US3280608A (en) * 1959-07-28 1966-10-25 Arthur R Parilla Incremental tube or vessel expander
US3344646A (en) * 1961-03-15 1967-10-03 Reynolds Metals Co Method for making thin metal sheet tapered receptacles
US3827130A (en) * 1970-09-18 1974-08-06 Cegedur Method of making thermoplastic lined metal bodies
JPS5838620A (ja) * 1981-08-31 1983-03-07 Kawasaki Steel Corp 金属薄板の局部成形用金型
US4829803A (en) * 1987-05-06 1989-05-16 Ti Corporate Services Limited Method of forming box-like frame members
CA2184996A1 (fr) * 1994-04-29 1995-11-09 Thomas D. Coe Procede et appareil d'hydroformage de pieces a paroi mince
US5749254A (en) * 1994-10-25 1998-05-12 Owens-Corning Fiberglas Technology, Inc. Air bearing assist in pneumatic forming of thin foil materials
US5916317A (en) * 1996-01-04 1999-06-29 Ball Corporation Metal container body shaping/embossing

Also Published As

Publication number Publication date
US6308545B2 (en) 2001-10-30
ES2216426T3 (es) 2004-10-16
US20010002545A1 (en) 2001-06-07
DE19860851A1 (de) 2000-07-06
DK1016473T3 (da) 2004-08-02
EP1016473A3 (fr) 2001-05-02
DE59909109D1 (de) 2004-05-13
EP1016473A2 (fr) 2000-07-05
ATE263641T1 (de) 2004-04-15

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