EP1063029B1 - Procédé d'hydroformage d'une pièce creuse - Google Patents

Procédé d'hydroformage d'une pièce creuse Download PDF

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Publication number
EP1063029B1
EP1063029B1 EP00109465A EP00109465A EP1063029B1 EP 1063029 B1 EP1063029 B1 EP 1063029B1 EP 00109465 A EP00109465 A EP 00109465A EP 00109465 A EP00109465 A EP 00109465A EP 1063029 B1 EP1063029 B1 EP 1063029B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
tool
hydraulic fluid
closing
temperature
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
EP00109465A
Other languages
German (de)
English (en)
Other versions
EP1063029A1 (fr
Inventor
Dipl.-Ing. Kleinschmidt Jürgen
Dr.-Ing. Töpker Dieter
Dipl.-Ing. Grussmann Elmar
Fritz Andreas Dr.-Ing.
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.)
Benteler Deustchland GmbH
Original Assignee
Benteler Deustchland 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 Benteler Deustchland GmbH filed Critical Benteler Deustchland GmbH
Publication of EP1063029A1 publication Critical patent/EP1063029A1/fr
Application granted granted Critical
Publication of EP1063029B1 publication Critical patent/EP1063029B1/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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
    • 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 internal pressure molding of a hollow Workpiece made of aluminum or an aluminum alloy, according to the Features in the preamble of claim 1.
  • the method of internal pressure forming of hollow, especially tubular, Workpieces within a closed tool is both at known as steel as well as non-ferrous metals. That in the Pressure fluid introduced into workpieces consists of water or a Water emulsion. The workpiece is formed at room temperature.
  • EP 0 785 036 A1 it is known to hot sand into a workpiece to bring in and reshape it.
  • both the workpiece and the tool are heated.
  • Forming maintains the temperature of the tool and the workpiece receive.
  • WO 98/54370 teaches the person skilled in the art to reshape steel, in particular boron steel. To do this, the steel is first heated to a temperature above the AC3 point, in particular to a temperature between 775 ° C and 1000 ° C, warmed up. The pressure should also be between 30 and 80 MPa, what Pressure ratios between about 300 and 800 bar mean. Closing domes as Components of lock cylinders are not disclosed.
  • the object of the invention is based on the prior art based on a method for the internal pressure forming of an open end having hollow workpiece made of aluminum or an aluminum alloy to create that is safer with shorter cycle times and with reduced Forming effort a more precise forming of the workpieces with less Guaranteed temperatures and pressures.
  • Nitrogen seen as a pressure fluid. Nitrogen does not cause chemical changes of the material of the workpiece and does not adhere to the inner surface of the workpiece.
  • the pressure fluid allows Nitrogen, namely in the form of a pure nitrogen, which is used in the standing temperature is inert, a particularly advantageous Application. Nitrogen is essential compared to a heat transfer oil cost-effective. Also there are no more problems with nitrogen in his Circulation on the valves, pistons and seals of the entire forming device available. After all, nitrogen can get into that much faster The workpiece is filled in and removed from it.
  • the temperature range of proves itself from an economic point of view 250 ° C to 350 ° C at a pressure between 180 bar and 250 bar depending on the Wall thicknesses and the configuration of the workpieces to be formed at Forming aluminum or aluminum alloys as special advantageous.
  • the specific internal pressure can in the respective workpiece to be formed via a in the feed line for the Pressure fluid incorporated control valve depending on the particular Warm-up temperature of the workpiece and the heating temperature of the tool to be controlled.
  • the nitrogen can be heated outside the tool.
  • the tool heating is usually sufficient to switch the nitrogen to the bring the necessary operating temperature if the nitrogen has appropriate Channels in the tool into the workpiece.
  • the temperature required for easier forming of the workpiece can be achieved by heating the tool.
  • the workpiece can be heated in various ways become. However, it is expedient according to claim 3 that the workpiece in an oven is brought to the necessary temperature externally.
  • the forming process can be carried out in a pure expansion Workpiece exist in the closed tool or according to claim 4 with be coupled to an additional displacement of at least one dome.
  • This method is used especially in complex configurations, e.g. then, when a lateral formation in the course of the workpiece a so-called cathedral is to be created and material is added must become. There is usually another in the area of the cathedral axially displaceable counterforce in the form of a hydraulically influenceable Counter plunger provided in the tool.
  • the pressure fluid can according to claim 5 before being introduced into the workpiece be tempered externally.
  • FIG. 1 is a schematically illustrated tool for internal pressure forming a hollow workpiece 2 in the form of an aluminum tube made of AlMg3 designated.
  • the S-shaped preformed workpiece 2 should be in the tool 1 final S-shaped contour with a lateral dome 3 in the middle transition section 4 received.
  • the tool 1 is in both the lower die 6 shown and not in the upper die shown with a heater 7, which at Embodiment is illustrated as an electric heating coil.
  • the tool 1 is hydraulic on both ends of the workpiece 2 Actuating locking cylinders 8, 9 with axially displaceable locking pins 10, 11 assigned. Of these locking pins 10, 11, the locking dome 11 is included provided a longitudinal channel 12 to which a feed line 13 for supplying a pressure fluid 14 consisting of pure nitrogen is connected. The Supply line 13 is guided via a control valve 15 with a pressure display 16.
  • Both locking pins 10, 11 serve to seal the ends 17 of the workpiece 2 and the introduction of axial pushing forces, if these for Training of the cathedral 3 are required.
  • the tool 1 is still a counter plunger 18 assigned as part of a hydraulically actuated cylinder 19.
  • the workpiece 2 preheated in this way is then placed in the mold cavity 5 and then the locking pins 10, 11 in the ends 17 of the Workpiece 2 retracted sealing.
  • the tool 1 can simultaneously with the
  • the pressure fluid 14 is then pressure-controlled via the feed line 13 inserted into the workpiece 2 and thereby his plasticized material in the Mold nest 5 pressed.
  • the internal pressure required here can be properly controlled via the control valve 15 Dependence on the respective warm-up temperature of the workpiece 2 and Heating temperature of tool 1 can be controlled.
  • the pressure fluid 14 can be heated before being fed to the closing mandrel 11. However, since the closing mandrel 11 is also heated via the tool 1, then it suffices from tool 1 to the locking dome 11 and from the locking mandrel 11 heat transferred to the pressure fluid 14 in the longitudinal channel 12 to deal with the Adjust the temperature level of workpiece 2 and tool 1.

Landscapes

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

Claims (5)

  1. Procédé pour l'hydroformage d'une pièce creuse (2) présentant des extrémités ouvertes (17) en aluminium ou en un alliage d'aluminium dans une cavité de formage (5) d'un outil en plusieurs parties (1), dans lequel la pièce (2) est déposée dans l'outil (1) ouvert, préalablement chauffé, ensuite dans les extrémités (17) de la pièce (2) sont introduits de façon étanche des composants de mandrins de fermeture (10,11) formant des vérins de fermeture (8,9) et ensuite l'outil (1) est fermé, après quoi par le biais d'au moins un mandrin de fermeture (10,11) un fluide de pression (14) est amené dans la pièce (2) et sous l'effet du fluide de pression (14) la matière de la pièce (2) est pressée dans la cavité de formage (5),
    caractérisé en ce que l'on amène de l'azote en tant que fluide de pression (14) par le mandrin de fermeture (10,11) également réchauffé par le chauffage de l'outil (1) dans la pièce plastifiée chaude (2) et la pièce (2) est pressée dans une plage de température entre 250°C et 350°C à une pression entre 180 bars et 250 bars dans la cavité de formage (5), tout en commandant la pression interne par le biais d'une soupape de régulation (15) incorporée dans la conduite d'amenée (13) pour le fluide (14) en fonction de la température de réchauffage respective de la pièce (2) et de la température de chauffe de l'outil (1).
  2. Procédé selon la revendication 1, caractérisé en ce que la pièce (2) est chauffée avant l'introduction dans l'outil (1).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la pièce (2) est chauffée extérieurement dans un four.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que lors de l'introduction de l'azote (14) au moins un mandrin de fermeture (11) est déplacé dans la pièce (2).
  5. Procédé selon l'une des revendications 1 à 4,
    caractérisé en ce que le fluide de pression (14) est tempéré extérieurement avant l'introduction dans la pièce (2).
EP00109465A 1999-06-24 2000-05-04 Procédé d'hydroformage d'une pièce creuse Expired - Lifetime EP1063029B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19928873A DE19928873B4 (de) 1999-06-24 1999-06-24 Verfahren und Vorrichtung zum Innendruckformen eines hohlen metallischen Werkstücks aus Aluminium oder einer Aluminiumlegierung
DE19928873 1999-06-24
US09/651,349 US6349583B1 (en) 1999-06-24 2000-08-29 Method and device for forming a hollow metallic workpiece by inner pressure

Publications (2)

Publication Number Publication Date
EP1063029A1 EP1063029A1 (fr) 2000-12-27
EP1063029B1 true EP1063029B1 (fr) 2004-11-10

Family

ID=26053906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00109465A Expired - Lifetime EP1063029B1 (fr) 1999-06-24 2000-05-04 Procédé d'hydroformage d'une pièce creuse

Country Status (3)

Country Link
US (1) US6349583B1 (fr)
EP (1) EP1063029B1 (fr)
DE (1) DE19928873B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109689241A (zh) * 2016-07-11 2019-04-26 萨帕公司 热金属气体成型的车顶纵梁及其制造方法

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US6322645B1 (en) * 1999-09-24 2001-11-27 William C. Dykstra Method of forming a tubular blank into a structural component and die therefor
US7024897B2 (en) * 1999-09-24 2006-04-11 Hot Metal Gas Forming Intellectual Property, Inc. Method of forming a tubular blank into a structural component and die therefor
US6701764B2 (en) * 2001-09-27 2004-03-09 Siemens Westinghouse Power Corporation Method of expanding an intermediate portion of a tube using an outward radial force
JP2003126923A (ja) 2001-10-24 2003-05-08 Honda Motor Co Ltd 管状部材の成形方法
DE10162440A1 (de) * 2001-12-19 2003-07-03 Bayerische Motoren Werke Ag Umformpresse
KR20040031175A (ko) * 2002-10-04 2004-04-13 주식회사 성우하이텍 알루미늄 합금의 온간 액압 성형 방법 및 그 장치
US7266982B1 (en) 2005-06-10 2007-09-11 Guza David E Hydroforming device and method
US20070128443A1 (en) * 2005-10-13 2007-06-07 Hoggan Steven C Method for altering the shape of a tube
US8448487B2 (en) 2008-10-16 2013-05-28 The Coca-Cola Company Vessel forming station
EP2798908B1 (fr) 2011-12-30 2018-07-18 The Coca-Cola Company Système et procédé de formation d'un contenant métallique pour boisson par moulage par pression
CN102641937B (zh) * 2012-02-29 2014-08-27 佛山市顺德区燉煌五金塑料实业有限公司 带支撑模的y型三通成型设备
JP6420828B2 (ja) * 2013-06-14 2018-11-07 ザ コカ・コーラ カンパニーＴｈｅ Ｃｏｃａ‐Ｃｏｌａ Ｃｏｍｐａｎｙ マルチブロー成形された金属コンテナ
EP3126533B1 (fr) * 2014-03-25 2023-05-03 Montebello Technology Services Ltd. Procédé de moulage par soufflage de récipients métalliques
CA2972280C (fr) 2014-12-30 2022-08-30 1949467 Ontario Inc. Procede d'extrusion par percussion, outillage et produit
CZ307213B6 (cs) 2016-09-19 2018-03-28 Západočeská Univerzita V Plzni Způsob výroby dutých těles a zařízení k provádění tohoto způsobu

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DE3543523A1 (de) * 1985-12-10 1987-06-11 Messerschmitt Boelkow Blohm Verfahren zum herstellen von behaeltern durch superplastisches verformen
US5214948A (en) * 1991-12-18 1993-06-01 The Boeing Company Forming metal parts using superplastic metal alloys and axial compression
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Publication number Priority date Publication date Assignee Title
CN109689241A (zh) * 2016-07-11 2019-04-26 萨帕公司 热金属气体成型的车顶纵梁及其制造方法

Also Published As

Publication number Publication date
US6349583B1 (en) 2002-02-26
EP1063029A1 (fr) 2000-12-27
DE19928873A1 (de) 2001-01-04
DE19928873B4 (de) 2004-08-12

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