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EP1502672A1 - Apparatus for making formpieces by internal high pression forming - Google Patents

Apparatus for making formpieces by internal high pression forming Download PDF

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Publication number
EP1502672A1
EP1502672A1 EP04016054A EP04016054A EP1502672A1 EP 1502672 A1 EP1502672 A1 EP 1502672A1 EP 04016054 A EP04016054 A EP 04016054A EP 04016054 A EP04016054 A EP 04016054A EP 1502672 A1 EP1502672 A1 EP 1502672A1
Authority
EP
European Patent Office
Prior art keywords
tool
shell
tool carrier
pressure medium
support unit
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
EP04016054A
Other languages
German (de)
French (fr)
Other versions
EP1502672B2 (en
EP1502672B1 (en
Inventor
Dieter Kapp
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.)
Theodor Graebener GmbH and Co KG
Original Assignee
Theodor Graebener GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=33103697&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1502672(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Theodor Graebener GmbH and Co KG filed Critical Theodor Graebener GmbH and Co KG
Publication of EP1502672A1 publication Critical patent/EP1502672A1/en
Application granted granted Critical
Publication of EP1502672B1 publication Critical patent/EP1502672B1/en
Publication of EP1502672B2 publication Critical patent/EP1502672B2/en
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
    • 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
    • B21D26/021—Deforming sheet bodies
    • B21D26/025—Means for controlling the clamping or opening of the moulds
    • 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
    • B21D26/021—Deforming sheet bodies
    • B21D26/031—Mould construction
    • 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
    • B21D26/039—Means for controlling the clamping or opening of the moulds
    • 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
    • B21D26/047—Mould construction

Definitions

  • the invention relates to a device for Production of molded parts by hydroforming.
  • presses Such device are well known as presses. Such presses are due to their design and the required dimensions by the forces occurring very space-consuming during the forming process.
  • the invention is therefore based on the object, a Device of the specified type to create, the very is compact and yet very small in space high forces can be absorbed without a Deflection of the device or the tool occurs and thus very high accuracies of the molding can be achieved.
  • the device according to the invention is distinguished above all characterized in that it is relatively compact and has only a minimum of functions, resulting in a significant Cost reduction for such a device is achieved.
  • the device is characterized in that During the forming process, the occurring stresses in distribute the two nested tubes, causing the Device are subjected to much higher forces can, without a deflection of the device or the Tool and thus the produced molded part occurs.
  • the device 1 shown in FIGS Production of molded parts by hydroforming exists essentially of a housing 2 of two nested and shrinking each other connected pipes 3, 4. It is in the concentric bore 5 of the inner tube 4, a tool carrier unit 6 is used, the can be moved out of the housing 2 for workpiece change.
  • the tool carrier unit 6 again consists essentially from two approximately half-shell-shaped tool carriers 7a, 7b, between which a tool 8 is arranged, in each case between tool carrier 7a, 7b and tool half 8a, 8b at least one with a pressure medium, for example oil, acted upon short-stroke cylinder 9a, 9b is arranged.
  • a pressure medium for example oil
  • the short-stroke cylinders 9a, 9b respectively from a piston 10 in a bore 11 in the Tool carriers 7a, 7b embedded and sealed.
  • the short-stroke cylinders 9a, 9b hold during the Forming process the two tool halves 8a, 8b in your Closed position, while the tool 8 and the workpiece 12th between the two tool halves 8a, 8b in the molding process with a medium, for example water or oil, is applied.
  • a medium for example water or oil
  • Pressure pad 14 may be provided.
  • the respective Pressure pad 14 by one of a inserted into a groove 15 Seal enclosed active surface 16 on the circumference 13 of the shell-shaped tool carrier 7a, 7b formed (see Fig. 3).

Landscapes

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

Abstract

Device for producing molded parts by inner high pressure deformation comprises a housing (2) formed by pipes (3, 4) which are connected together by shrinking, and a tool support unit (6) consisting of half-shells (7a, 7b) and inserted into the hole of the inner pipe. A short-stroke cylinder (9a, 9b) impinged with pressure medium is arranged between each half shell and each tool half. The cylinder holds the workpiece halves in their closing position. Preferred Features: A pressure cushion impinged with a pressure medium is provided on the outer periphery of the workpiece support unit. The pressure cushion is formed by an active surface enclosed by a seal inserted into a groove on the periphery of the support unit.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur Herstellung von Formteilen durch Innenhochdruckumformung.The invention relates to a device for Production of molded parts by hydroforming.

Solche Vorrichtung sind als Pressen hinlänglich bekannt. Derartige Pressen sind aufgrund ihrer Bauweise und den erforderlichen Dimensionierungen durch die auftretenden Kräfte während des Umformprozesses sehr platzraubend.Such device are well known as presses. Such presses are due to their design and the required dimensions by the forces occurring very space-consuming during the forming process.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der angegebenen Gattung zu schaffen, die sehr kompakt gebaut ist und mit der dennoch auf kleinem Raum sehr hohe Kräfte aufgenommen werden können, ohne daß eine Durchbiegung der Vorrichtung bzw. des Werkzeugs auftritt und somit sehr hohe Genauigkeiten des Formteils erreicht werden.The invention is therefore based on the object, a Device of the specified type to create, the very is compact and yet very small in space high forces can be absorbed without a Deflection of the device or the tool occurs and thus very high accuracies of the molding can be achieved.

Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung mit den Kennzeichnungsmerkmale des Patentanspruchs 1 gelöst.This object is achieved by a device solved with the characterizing features of claim 1.

Eine zweckmäßige Weiterbildung der Erfindung ist in dem einzigen Unteranspruch gekennzeichnet.An expedient development of the invention is in the single subclaim characterized.

Die erfindungsgemäße Vorrichtung zeichnet sich vor allem dadurch aus, daß dieselbe relativ kompakt ausgebildet ist und nur ein Minimum an Funktionen aufweist, wodurch eine erhebliche Kostenreduzierung für eine solche Vorrichtung erreicht wird. The device according to the invention is distinguished above all characterized in that it is relatively compact and has only a minimum of functions, resulting in a significant Cost reduction for such a device is achieved.

Ferner zeichnet sich die Vorrichtung dadurch aus, daß während des Umformprozesses sich die auftretenden Spannungen in den beiden ineinandergesetzten Rohren verteilen, wodurch die Vorrichtung mit wesentlich höheren Kräften beaufschlagt werden kann, ohne daß eine Durchbiegung der Vorrichtung bzw. des Werkzeugs und somit des hergestellten Formteils auftritt.Furthermore, the device is characterized in that During the forming process, the occurring stresses in distribute the two nested tubes, causing the Device are subjected to much higher forces can, without a deflection of the device or the Tool and thus the produced molded part occurs.

Die zwischen Werkzeugträger und Werkzeughälften angeordneten Kurzhubzylinder sorgen dafür, daß das Werkzeug während des Umformprozesses optimal zugehalten wird.The arranged between tool carrier and tool halves Kurzhubzylinder ensure that the tool during the Forming process is optimally locked.

Weitere Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung anhand von die Erfindung wiedergebenden und in der Zeichnung dargestellten Ausführungsbeispielen. Dabei zeigt

Fig. 1
eine schematische Querschnittsdarstellung eines ersten Ausführungsbeispiels einer erfindungsgemäßen Vorrichtung,
Fig. 2
die Querschnittsdarstellung der Vorrichtung mit Druckbeaufschlagung ohne Werkzeug und Kurzhubzylinder und
Fig. 3
in Sprengdarstellung ein zweites Ausführungsbeispiel der Vorrichtung.
Further advantages of the invention will become apparent from the following description with reference to the invention reproducing and illustrated in the drawings embodiments. It shows
Fig. 1
a schematic cross-sectional view of a first embodiment of a device according to the invention,
Fig. 2
the cross-sectional view of the device with pressurization without tools and Kurzhubzylinder and
Fig. 3
in exploded view, a second embodiment of the device.

Die in den Figuren dargestellte Vorrichtung 1 zur Herstellung von Formteilen durch Innenhochdruckumformung besteht im wesentlichen aus einem Gehäuse 2 aus zwei ineinandergesteckten und durch Schrumpfung miteinander verbundenen Rohren 3, 4. Dabei ist in die konzentrische Bohrung 5 des Innenrohres 4 eine Werkzeugträgereinheit 6 eingesetzt, die aus dem Gehäuse 2 zum Werkstückwechsel herausfahrbar ist.The device 1 shown in FIGS Production of molded parts by hydroforming exists essentially of a housing 2 of two nested and shrinking each other connected pipes 3, 4. It is in the concentric bore 5 of the inner tube 4, a tool carrier unit 6 is used, the can be moved out of the housing 2 for workpiece change.

Die Werkzeugträgereinheit 6 besteht wiederum im wesentlichen aus zwei etwa halbschalenförmigen Werkzeugträgern 7a, 7b, zwischen denen ein Werkzeug 8 angeordnet ist, wobei jeweils zwischen Werkzeugträger 7a, 7b und Werkzeughälfte 8a, 8b mindestens ein mit einem Druckmedium, beispielsweise Öl, beaufschlagbarer Kurzhubzylinder 9a, 9b angeordnet ist. Wie in Fig. 1 erkennbar, bestehen die Kurzhubzylinder 9a, 9b jeweils aus einem Kolben 10, der in einer Bohrung 11 in den Werkzeugträgern 7a, 7b eingebettet und abgedichtet ist.The tool carrier unit 6 again consists essentially from two approximately half-shell-shaped tool carriers 7a, 7b, between which a tool 8 is arranged, in each case between tool carrier 7a, 7b and tool half 8a, 8b at least one with a pressure medium, for example oil, acted upon short-stroke cylinder 9a, 9b is arranged. As in Fig. 1 can be seen, the short-stroke cylinders 9a, 9b respectively from a piston 10 in a bore 11 in the Tool carriers 7a, 7b embedded and sealed.

Die Kurzhubzylinder 9a, 9b halten während des Umformungsprozesses die beiden Werkzeughälften 8a, 8b in Ihrer Schließposition, während das Werkzeug 8 bzw. das Werkstück 12 zwischen den beiden Werkzeughälften 8a, 8b beim Unformprozeß mit einem Medium, beispielsweise Wasser oder Öl, beaufschlagt wird.The short-stroke cylinders 9a, 9b hold during the Forming process the two tool halves 8a, 8b in your Closed position, while the tool 8 and the workpiece 12th between the two tool halves 8a, 8b in the molding process with a medium, for example water or oil, is applied.

Durch das Ineinanderstecken der zwei Rohre 3, 4 zu einem Gehäuse 2 und durch eine gezielte Aufbringung einer Gegenvorspannung durch Aufschrumpfen der beiden Rohre 3, 4 zueinander wird entgegen der Verwendung eines einzelnen Rohres als Gehäuse oder eines Rechteckrahmens als Gehäuse eine erhebliche Reduzierung der maximalen Spannungen erreicht.By nesting the two tubes 3, 4 to a Housing 2 and by a targeted application of a Counter-biasing by shrinking the two tubes 3, 4th each other is contrary to the use of a single tube as a housing or a rectangular frame as a housing significant reduction in maximum stresses.

Bei extrem hohen Drücken und ggf. zum Ausgleich von Verformungen der Rohre 3, 4 im Bereich der halbschalenförmigen Werkzeugträger 7a, 7b kann am äußeren Umfang 13 der Werkzeugträger 7a, 7b ober- bzw. unterhalb der Kurzhubzylinder 9a, 9b jeweils ein mit einem Druckmedium beaufschlagbares Druckkissen 14 vorgesehen sein. Dabei ist das jeweilige Druckkissen 14 durch eine von einer in eine Nut 15 eingesetzte Dichtung umschlossenen Wirkfläche 16 auf dem Umfang 13 der halbschalenförmigen Werkzeugträger 7a, 7b gebildet (siehe Fig. 3).At extremely high pressures and possibly to compensate for Deformations of the tubes 3, 4 in the region of the shell-shaped Tool carrier 7a, 7b can on the outer circumference 13 of Tool carrier 7a, 7b above or below the short-stroke cylinder 9a, 9b each acted upon by a pressure medium Pressure pad 14 may be provided. Here is the respective Pressure pad 14 by one of a inserted into a groove 15 Seal enclosed active surface 16 on the circumference 13 of the shell-shaped tool carrier 7a, 7b formed (see Fig. 3).

Claims (4)

Vorrichtung zur Herstellung von Formteilen durch Innenhochdruckumformung, dadurch gekennzeichnet, daß die Vorrichtung (1) aus einem Gehäuse (2) aus zwei ineinandergesteckten und durch Schrumpfung miteinander verbundenen Rohren (3, 4) besteht, wobei in die konzentrische Bohrung (5) des Innenrohres (4) die Werkzeugträgereinheit (6) eingesetzt ist.Apparatus for the production of molded parts by hydroforming, characterized in that the device (1) consists of a housing (2) of two nested tubes (3, 4) interconnected by shrinkage, wherein into the concentric bore (5) of the inner tube (5) 4) the tool carrier unit (6) is inserted. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Werkzeugträgereinheit (6) aus zwei etwa halbschalenförmigen Werkzeugträgern (7a, 7b) besteht, an dem ein Werkzeug (8) befestigt ist, wobei jeweils zwischen Werkzeugträger (7a, 7b) und Werkzeughälfte (8a, 8b) mindestens ein mit einem Druckmedium beaufschlagbarer Kurzhubzylinder (9a, 9b) angeordnet ist, der während des Umformungsprozesses die beiden Werkzeughälften (8a, 8b) in ihrer Schließposition hält.Apparatus according to claim 1, characterized in that the tool carrier unit (6) consists of two approximately half-shell-shaped tool carriers (7a, 7b), on which a tool (8) is fixed, wherein between each tool carrier (7a, 7b) and mold half (8a, 8b) at least one with a pressure medium acted upon Kurzhubzylinder (9a, 9b) is arranged, which holds the two tool halves (8a, 8b) in its closed position during the forming process. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß am äußeren Umfang (13) der halbschalenförmigen Werkzeugträger (7a, 7b) ober- bzw. unterhalb der Kurzhubzylinder (9a, 9b) jeweils ein mit einem Druckmedium beaufschlagbares Druckkissen (14) vorgesehen ist.Apparatus according to claim 1 or 2, characterized in that on the outer circumference (13) of the half-shell-shaped tool carrier (7a, 7b) above or below the Kurzhubzylinder (9a, 9b) each provided with a pressure medium pressure pad (14) is provided. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das jeweilige Druckkissen (14) durch eine von einer in eine Nut (15) eingesetzte Dichtung umschlossenen Wirkfläche (16) auf dem Umfang (13) der halbschalenförmigen Werkzeuträger (7a, 7b) gebildet ist.Device according to Claim 3, characterized in that the respective pressure pad (14) is formed by an active surface (16) enclosed by a seal inserted in a groove (15) on the circumference (13) of the shell-shaped tool carriers (7a, 7b).
EP04016054A 2003-07-30 2004-07-08 Apparatus for making articles by internal high pressure forming Expired - Lifetime EP1502672B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10334660A DE10334660B3 (en) 2003-07-30 2003-07-30 Device for producing molded parts comprises a housing formed by pipes which are connected together by shrinking, and a tool support unit consisting of half-shells and inserted into the hole of the inner pipe
DE10334660 2003-07-30

Publications (3)

Publication Number Publication Date
EP1502672A1 true EP1502672A1 (en) 2005-02-02
EP1502672B1 EP1502672B1 (en) 2007-09-19
EP1502672B2 EP1502672B2 (en) 2012-03-28

Family

ID=33103697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04016054A Expired - Lifetime EP1502672B2 (en) 2003-07-30 2004-07-08 Apparatus for making articles by internal high pressure forming

Country Status (4)

Country Link
US (1) US7080536B2 (en)
EP (1) EP1502672B2 (en)
AT (1) ATE373529T1 (en)
DE (2) DE10334660B3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1813363A1 (en) * 2006-01-27 2007-08-01 Theodor Gräbener GmbH & Co. KG Hydroforming press for manufacturing articles by internal high-pressure forming
EP2221126A1 (en) * 2009-02-20 2010-08-25 Theodor Gräbener GmbH & Co. KG Device for forming workpieces

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US3006306A (en) * 1956-02-07 1961-10-31 Gen Tire & Rubber Co Hydraulic press
US3661004A (en) * 1969-11-07 1972-05-09 Atlas Chem Ind Explosive tubing swager
US4676086A (en) * 1985-04-18 1987-06-30 Asea Aktiebolag Press of pressure cell type
EP0713761A1 (en) * 1994-07-15 1996-05-29 Verson Europa S.A. Method and apparatus for changing diaphragm in a pressure cell type press
WO2000027563A2 (en) * 1998-11-06 2000-05-18 Ap Parts International, Inc. Metal forming apparatus and method of use

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US3224042A (en) † 1963-10-23 1965-12-21 Barogenics Inc Hydrostatic pressure device
US3379043A (en) † 1965-03-01 1968-04-23 Western Electric Co Pressure vessel for forming apparatus
US3545241A (en) * 1968-04-22 1970-12-08 Verson Allsteel Press Co Hydraulic press
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Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
US3006306A (en) * 1956-02-07 1961-10-31 Gen Tire & Rubber Co Hydraulic press
US3661004A (en) * 1969-11-07 1972-05-09 Atlas Chem Ind Explosive tubing swager
US4676086A (en) * 1985-04-18 1987-06-30 Asea Aktiebolag Press of pressure cell type
EP0713761A1 (en) * 1994-07-15 1996-05-29 Verson Europa S.A. Method and apparatus for changing diaphragm in a pressure cell type press
WO2000027563A2 (en) * 1998-11-06 2000-05-18 Ap Parts International, Inc. Metal forming apparatus and method of use

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1813363A1 (en) * 2006-01-27 2007-08-01 Theodor Gräbener GmbH & Co. KG Hydroforming press for manufacturing articles by internal high-pressure forming
EP2221126A1 (en) * 2009-02-20 2010-08-25 Theodor Gräbener GmbH & Co. KG Device for forming workpieces
WO2010094383A3 (en) * 2009-02-20 2010-11-11 Theodor Gräbener GmbH & Co. KG Device for the production of molded articles
US8739592B2 (en) 2009-02-20 2014-06-03 Theodor Graebener Gmbh & Co. Kg Device for the production of molded parts

Also Published As

Publication number Publication date
DE10334660B3 (en) 2004-11-04
DE502004004998D1 (en) 2007-10-31
EP1502672B2 (en) 2012-03-28
US20050022576A1 (en) 2005-02-03
ATE373529T1 (en) 2007-10-15
EP1502672B1 (en) 2007-09-19
US7080536B2 (en) 2006-07-25

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