EP1813363B1 - Hydroforming press for manufacturing articles by internal high-pressure forming - Google Patents

Hydroforming press for manufacturing articles by internal high-pressure forming Download PDF

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Publication number
EP1813363B1
EP1813363B1 EP07001287A EP07001287A EP1813363B1 EP 1813363 B1 EP1813363 B1 EP 1813363B1 EP 07001287 A EP07001287 A EP 07001287A EP 07001287 A EP07001287 A EP 07001287A EP 1813363 B1 EP1813363 B1 EP 1813363B1
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EP
European Patent Office
Prior art keywords
pressure
die
tool
short
stroke cylinder
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.)
Active
Application number
EP07001287A
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German (de)
French (fr)
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EP1813363A1 (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
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Theodor Graebener GmbH and Co KG
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Publication of EP1813363A1 publication Critical patent/EP1813363A1/en
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
    • F24F8/167—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using catalytic reactions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
    • F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light

Definitions

  • the invention relates to a hydroforming press for the production of moldings by hydroforming, with a press housing of an outer tube and an inner tube, which are inserted into one another and connected by shrinkage, and a tool carrier used in the inner tube, consisting of two approximately half-shell-shaped tool carriers for a through an upper tool and a lower tool formed consists of a tool which can be acted upon by a hydrostatic internal pressure forming a workpiece to a molding, wherein between the upper tool carrier and the upper tool at least one upper and between the lower tool carrier and the lower tool at least one lower acted upon by a pressure medium Short stroke cylinder is arranged with a pressure piston for closing the tools during the forming process.
  • Such a device is from the EP-A-1 502 672 ( DE 103 34 660 ) known.
  • the invention has for its object to improve the construction of the generic hydroforming press to the effect that deformations of the upper and lower tool of the tool and the pressure piston of the Kurzhubzylinders are avoided for closing the tool during the forming process.
  • the idea of the invention is based on compensating the operating pressure of the liquid medium for deforming a workpiece, which acts on the tool and the housing of the hydroforming press, and thus eliminating deformations of the hydroforming press.
  • the compensation of the operating pressure of the forming medium is achieved by a press housing, which consists of two nested tubes, wherein the outer tube is shrunk to achieve a counter-bias on the inner tube, further by the use of a tool consisting of an upper tool and a lower tool, wherein between the upper tool and the half-shell-shaped upper tool carrier inserted into the inner tube of the press housing and between the lower tool and the half-shell-shaped lower tool carrier seated in the inner tube of the press housing each have a short-stroke cylinder which can be acted upon by a pressure medium with a pressure piston for applying one to the upper tool and the lower tool acting closing force during the forming process and for applying a force acting on the upper and the lower tool back pressure to the operating pressure of the forming medium is arranged, and by the arrangement of
  • the housing 2 of the hydroforming press 1 shown in the drawing figure for the production of molded parts by hydroforming consists of an outer tube 3 and an inner tube 4, which are nested and connected by shrinkage.
  • a tool carrier unit 6 is used, which can be moved out of the housing 2 for workpiece change.
  • the tool carrier unit 6 consists of two approximately half-shell-shaped tool carriers 7, 8 for a tool 9 formed by an upper tool 10 and a lower tool 11, which contains a mold chamber 12, which can be acted upon by a hydrostatic internal pressure, for deforming a workpiece 13 to form a molded part.
  • a pressure medium for example oil acted upon Kurzhubzylinder 14, 15 with a cylinder bore 16, 17 in the upper tool carrier 7 and the lower tool carrier eighth displaceable pressure piston 18, 19 for closing the upper tool 10 and the lower tool eleventh arranged with the mold chamber 12, which is acted upon during the forming process with a pressure medium, such as water or oil.
  • the pressure pads 20, 21 serve to compensate for the pressure acting on the pressure piston 18, 19 of the two short-stroke cylinders 14, 15 and the upper and lower tool 10, 11 internal pressure of the mold chamber 12 and prevent bending deformation of the upper and lower tool 10, 11th
  • the pressure pads 20, 21 are integrated into the pressure pistons 18, 19 of the upper and lower Kurzhubzylinders 14, 15 and sealed against the upper and the lower tool 10, 11.
  • the pressure with which the pressure pads 20, 21 are acted upon can be regulated as a function of the internal pressure of the molding chamber 12.

Abstract

A hydroform press has shrink-joined outer (3) and inner (4) pipes. The inner pipe has a two-part (7, 8) tool mount (6) for an upper (10) and lower (11) tool (9) with a work piece (13) form chamber (12). Short stroke cylinders (14, 15) are located between the tools and tool mounts, and close the tools during the forming process. A pressure cushion (20, 21) is located between the short stroke cylinder pressure pistons (18, 19), the upper and lower tools respectively. The cushions compensate the form chamber (12) inner pressure on the pistons (18, 19) and tools (10, 11). The cushions are integrated in the pistons (18, 19) and/or in the upper and lower tools. Cushion pressure is regulated in accordance with form chamber (12) pressure.

Description

Die Erfindung betrifft eine Hydroformpresse zur Herstellung von Formteilen durch Innenhochdruckumformung, mit einem Pressengehäuse aus einem Außenrohr und einem Innenrohr, die ineinandergesteckt und durch Schrumpfung miteinander verbunden sind, sowie einer in das Innenrohr eingesetzten Werkzeugträgereinheit, die aus zwei etwa halbschalenförmigen Werkzeugträgern für ein durch ein Oberwerkzeug und ein Unterwerkzeug gebildetes Werkzeug besteht, das eine mit einem hydrostatischen Innendruck beaufschlagbare Formkammer zur Verformung eines Werkstücks zu einem Formteil enthält, wobei zwischen dem oberen Werkzeugträger und dem Oberwerkzeug mindestens ein oberer sowie zwischen dem unteren Werkzeugträger und dem Unterwerkzeug mindestens ein unterer mit einem Druckmedium beaufschlagbarer Kurzhubzylinder mit einem Druckkolben zum Schließen der Werkzeuge während des Umformprozesses angeordnet ist.The invention relates to a hydroforming press for the production of moldings by hydroforming, with a press housing of an outer tube and an inner tube, which are inserted into one another and connected by shrinkage, and a tool carrier used in the inner tube, consisting of two approximately half-shell-shaped tool carriers for a through an upper tool and a lower tool formed consists of a tool which can be acted upon by a hydrostatic internal pressure forming a workpiece to a molding, wherein between the upper tool carrier and the upper tool at least one upper and between the lower tool carrier and the lower tool at least one lower acted upon by a pressure medium Short stroke cylinder is arranged with a pressure piston for closing the tools during the forming process.

Eine solche Vorrichtung ist aus der EP-A-1 502 672 ( DE 103 34 660 ) bekannt.Such a device is from the EP-A-1 502 672 ( DE 103 34 660 ) known.

Bei einer in der DE 103 34 660 B3 beschriebenen Hydroformpresse dieser Art ist es nicht zu vermeiden, daß beim Umformprozeß durch den hydrostatischen Innendruck des Druckmediums in der Formkammer Verformungen, insbesondere Durchbiegungen an den Druckkolben der mit einem Druckmedium beaufschlagbaren Kurzhubzylinder zum Schließen des Werkzeugs beim Umformprozeß auftreten. Gleichzeitig mit den Verformungen an den Druckkolben der Kurzhubzylinder treten Verformungen, insbesondere Durchbiegungen am Ober- und Unterwerkzeug des Umformwerkzeugs auf, die Maßungenauigkeiten der hergestellten Formteile zur Folgen haben.At one in the DE 103 34 660 B3 described hydroforming press of this type, it is unavoidable that occur during the forming process by the hydrostatic internal pressure of the pressure medium in the mold chamber deformations, in particular deflections of the pressure piston acted upon by a pressure medium Kurzhubzylinder for closing the tool during the forming process. Simultaneously with the deformations of the pressure piston of the short-stroke cylinder occur deformations, in particular deflections on the upper and lower tool of the Forming tool on which have dimensional inaccuracies of the molded parts to follow.

Der Erfindung liegt die Aufgabe zugrunde, die Konstruktion der gattungsgemäßen Hydroformpresse dahingehend zu verbessern, daß Verformungen des Ober- und des Unterwerkzeuges des Werkzeugs sowie der Druckkolben der Kurzhubzylinders zum Schließen des Werkzeugs beim Umformprozeß vermieden werden.The invention has for its object to improve the construction of the generic hydroforming press to the effect that deformations of the upper and lower tool of the tool and the pressure piston of the Kurzhubzylinders are avoided for closing the tool during the forming process.

Diese Aufgabe wird erfindungsgemäß gelöst durch eine Hydroformpresse mit den Merkmalen des Patentanspruchs 1.This object is achieved by a hydroforming press with the features of claim 1.

Die Unteransprüche beinhalten vorteilhafte und zweckmäßige Weiterbildungen der Erfindung.The subclaims contain advantageous and expedient developments of the invention.

Der Erfindungsgedanke beruht darauf, den Betriebsdruck des flüssigen Mediums zum Verformen eines Werkstücks, der auf das Werkzeug und das Gehäuse der Hydroformpresse wirkt, zu kompensieren und damit zu Verformungen führende Biegebeanspruchungen der Hydroformpresse auszuschalten. Die Kompensation des Betriebsdruckes des Umformmediums wird erreicht durch ein Pressengehäuse, das aus zwei ineinandergesteckten Rohren besteht, wobei das Außenrohr zum Erzielen einer Gegenvorspannung auf das Innenrohr aufgeschrumpft ist, ferner durch die Verwendung eines aus einem Oberwerkzeug und einem Unterwerkzeug bestehenden Werkzeugs, wobei zwischen dem Oberwerkzeug und dem in das Innenrohr des Pressengehäuses eingesetzten, halbschalenförmigen oberen Werkzeugträger sowie zwischen dem Unterwerkzeug und dem in dem Innenrohr des Pressengehäuses sitzenden, halbschalenförmigen unteren Werkzeugträger jeweils ein mit einem Druckmedium beaufschlagbarer Kurzhubzylinder mit einem Druckkolben zum Aufbringen einer auf das Oberwerkzeug und das Unterwerkzeug wirkenden Schließkraft beim Umformprozeß und zum Aufbringen eines auf das Ober- und das Unterwerkzeug wirkenden Gegendruckes zum Betriebsdruck des Umformmediums angeordnet ist, sowie durch die Anordnung von mit einem Druckmedium beaufschlagbaren Druckkissen zwischen den Druckkolben des oberen und des unteren Kurzhubzylinders einerseits sowie dem Ober- und dem Unterwerkzeug andererseits.The idea of the invention is based on compensating the operating pressure of the liquid medium for deforming a workpiece, which acts on the tool and the housing of the hydroforming press, and thus eliminating deformations of the hydroforming press. The compensation of the operating pressure of the forming medium is achieved by a press housing, which consists of two nested tubes, wherein the outer tube is shrunk to achieve a counter-bias on the inner tube, further by the use of a tool consisting of an upper tool and a lower tool, wherein between the upper tool and the half-shell-shaped upper tool carrier inserted into the inner tube of the press housing and between the lower tool and the half-shell-shaped lower tool carrier seated in the inner tube of the press housing each have a short-stroke cylinder which can be acted upon by a pressure medium with a pressure piston for applying one to the upper tool and the lower tool acting closing force during the forming process and for applying a force acting on the upper and the lower tool back pressure to the operating pressure of the forming medium is arranged, and by the arrangement of acted upon with a pressure medium pressure pad between the pressure piston of the upper and lower Kurzhubzylinders one hand and the upper and Lower tool on the other.

Die erfindungsgemäße Hydroformpresse ist nachstehend anhand einer Querschnittdarstellung erläutert.The hydroforming press according to the invention is explained below with reference to a cross-sectional view.

Das Gehäuse 2 der in der Zeichnungsfigur dargestellten Hydroformpresse 1 zur Herstellung von Formteilen durch Innenhochdruckumformung besteht aus einem Außenrohr 3 und einem Innenrohr 4, die ineinandergesteckt und durch Schrumpfung miteinander verbunden sind. In die Bohrung 5 des Innenrohres 4 ist eine Werkzeugträgereinheit 6 eingesetzt, die zum Werkstückwechsel aus dem Gehäuse 2 herausfahrbar ist.The housing 2 of the hydroforming press 1 shown in the drawing figure for the production of molded parts by hydroforming consists of an outer tube 3 and an inner tube 4, which are nested and connected by shrinkage. In the bore 5 of the inner tube 4, a tool carrier unit 6 is used, which can be moved out of the housing 2 for workpiece change.

Die Werkzeugträgereinheit 6 besteht aus zwei etwa halbschalenförmigen Werkzeugträgern 7, 8 für ein durch ein Oberwerkzeug 10 und ein Unterwerkzeug 11 gebildetes Werkzeug 9, das eine mit einem hydrostatischen Innendruck beaufschlagbare Formkammer 12 zur Verformung eines Werkstücks 13 zu einem Formteil enthält.The tool carrier unit 6 consists of two approximately half-shell-shaped tool carriers 7, 8 for a tool 9 formed by an upper tool 10 and a lower tool 11, which contains a mold chamber 12, which can be acted upon by a hydrostatic internal pressure, for deforming a workpiece 13 to form a molded part.

Zwischen dem oberen Werkzeugträger 7 und dem Oberwerkzeug 10 sowie zwischen dem unteren Werkzeugträger 8 und dem Unterwerkzeug 11 ist jeweils ein mit einem Druckmedium, beispielsweise Öl beaufschlagbarer Kurzhubzylinder 14, 15 mit einem in einer Zylinderbohrung 16, 17 im oberen Werkzeugträger 7 und im unteren Werkzeugträger 8 verschiebbaren Druckkolben 18, 19. zum Schließen des Oberwerkzeugs 10 und des Unterwerkzeugs 11 mit der Formkammer 12 angeordnet, die während des Umformprozesses mit einem Druckmedium, beispielsweise Wasser oder Öl beaufschlagt wird.Between the upper tool carrier 7 and the upper tool 10 and between the lower tool carrier 8 and the lower tool 11 is in each case one with a pressure medium, for example oil acted upon Kurzhubzylinder 14, 15 with a cylinder bore 16, 17 in the upper tool carrier 7 and the lower tool carrier eighth displaceable pressure piston 18, 19 for closing the upper tool 10 and the lower tool eleventh arranged with the mold chamber 12, which is acted upon during the forming process with a pressure medium, such as water or oil.

Zwischen dem Druckkolben 18 des oberen Kurzhubzylinders 14 und dem Oberwerkzeug 10 sowie zwischen dem Druckkolben 19 des unteren Kurzhubzylinders 15 und dem Unterwerkzeug 11 ist jeweils ein mit einem Druckmedium beaufschlagbares Druckkissen 20, 21 angeordnet.Between the pressure piston 18 of the upper short-stroke cylinder 14 and the upper tool 10 and between the pressure piston 19 of the lower Kurzhubzylinders 15 and the lower tool 11 is in each case acted upon by a pressure medium pressure pad 20, 21 is arranged.

Die Druckkissen 20, 21 dienen zur Kompensation des auf die Druckkolben 18, 19 der beiden Kurzhubzylinder 14, 15 sowie das Ober- und Unterwerkzeug 10, 11 wirkenden Innendrucks der Formkammer 12 und verhindern eine Biegeverformung des Ober- und des Unterwerkzeugs 10, 11.The pressure pads 20, 21 serve to compensate for the pressure acting on the pressure piston 18, 19 of the two short-stroke cylinders 14, 15 and the upper and lower tool 10, 11 internal pressure of the mold chamber 12 and prevent bending deformation of the upper and lower tool 10, 11th

Die Druckkissen 20, 21 sind in die Druckkolben 18, 19 des oberen und des unteren Kurzhubzylinders 14, 15 integriert und gegen das Ober- und das Unterwerkzeug 10, 11 abgedichtet.The pressure pads 20, 21 are integrated into the pressure pistons 18, 19 of the upper and lower Kurzhubzylinders 14, 15 and sealed against the upper and the lower tool 10, 11.

Es besteht ferner die Möglichkeit, die Druckkissen 20, 21 in das Oberwerkzeug 10 und das Unterwerkzeug 11 oder jeweils in die Druckkolben 18, 19 der Kurzhubzylinder 14, 15 sowie das Ober- und das Unterwerkzeug 10, 11 zu integrieren.It is also possible to integrate the pressure pads 20, 21 into the upper tool 10 and the lower tool 11 or respectively into the pressure pistons 18, 19 of the short-stroke cylinders 14, 15 and the upper and lower tools 10, 11.

Der Druck, mit dem die Druckkissen 20, 21 beaufschlagt werden, ist in Abhängigkeit vom Innendruck der Formkammer 12 regelbar.The pressure with which the pressure pads 20, 21 are acted upon can be regulated as a function of the internal pressure of the molding chamber 12.

Bezugszeichenreference numeral

11
HydroformpresseHydroforming press
22
Gehäuse von 1Housing of 1
33
Außenrohr von 2Outer tube of 2
44
Innenrohr von 2Inner tube of 2
55
Bohrung von 4Hole of 4
66
WerkzeugträgereinheitTool carrier unit
77
Werkzeugträger von 6Tool carrier of 6
88th
Werkzeugträger von 6Tool carrier of 6
99
WerkzeugTool
1010
Oberwerkzeug von 9Upper tool of 9
1111
Unterwerkzeug von 9Lower tool of 9
1212
Formkammer von 9Form chamber of 9
1313
Werkstückworkpiece
1414
KurzhubzylinderShort stroke
1515
KurzhubzylinderShort stroke
1616
Zylinderbohrung von 7Cylinder bore of 7
1717
Zylinderbohrung von 8Cylinder bore of 8
1818
Druckkolben von 14Pressure piston of 14
1919
Druckkolben von 15Pressure piston of 15
2020
Druckkissencaul
2121
Druckkissencaul

Claims (3)

  1. Hydroforming press for the production of shaped parts by forming under high internal pressure, with a press housing comprising an external pipe and an internal pipe, which are fitted into one another and connected to one another by shrinking, and also a die support unit, which is inserted into the internal pipe and comprises two approximately half shell-shaped die supports for a die formed by an upper die and a lower die, said die containing a forming chamber, to which a hydrostatic internal pressure can be applied to deform a workpiece into a shaped part, wherein at least one upper short-stroke cylinder is arranged between the upper die holder and the upper die and also at least one lower short-stroke cylinder is arranged between the lower die support and the lower die, and a pressure medium can be applied to said respective short-stroke cylinders with a plunger to close the dies during the forming process, characterised by at least one pressure pad (20), to which a pressure medium can be applied and which is arranged between the plunger (18) of the upper short-stroke cylinder (14) and the upper die (10), and also by at least one least one pressure pad (21), to which a pressure medium can be applied and which is arranged between the plunger (19) of the lower short-stroke cylinder (15) and the lower die (11), for compensation of the internal pressure of the forming chamber (12) acting on the plungers (18, 19) and also the upper and lower die (10, 11).
  2. Hydroforming press according to claim 1, characterised in that the pressure pads (20, 21) are integrated into the plungers (18, 19) of the upper and the lower short-stroke cylinder (14, 15) and/or into the upper die (10) and also the lower die (11).
  3. Hydroforming press according to claim 1 and 2, characterised by an ability to regulate the pressure of the pressure medium applied to the pressure pads (20, 21) in dependence on the internal pressure of the forming chamber (12).
EP07001287A 2006-01-27 2007-01-22 Hydroforming press for manufacturing articles by internal high-pressure forming Active EP1813363B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006003981A DE102006003981B4 (en) 2006-01-27 2006-01-27 Hydroforming press for the production of molded parts by hydroforming

Publications (2)

Publication Number Publication Date
EP1813363A1 EP1813363A1 (en) 2007-08-01
EP1813363B1 true EP1813363B1 (en) 2008-07-09

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EP (1) EP1813363B1 (en)
JP (1) JP2007196292A (en)
KR (1) KR20070078737A (en)
AT (1) ATE400377T1 (en)
DE (2) DE102006003981B4 (en)
ES (1) ES2306438T3 (en)

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ES2374020T3 (en) * 2009-02-20 2012-02-13 Theodor Grabener Gmbh & Co. Kg HYDROFORMATION TOOL.
DE102010008745A1 (en) 2010-02-20 2011-08-25 Simmoteit, Robert, Dr., 72414 Rinsing device for cleaning of instruments, particularly medical hollow instruments, has connection for medium and insertable tube or cap piece or enclosed rinsing tube by which instrument surfaces and rinsable channels are cleaned
DE102011052733B4 (en) * 2011-08-16 2023-09-28 Langenstein & Schemann Gmbh Machine foundation, method for operating a forming machine and forming system
CN102601204A (en) * 2012-03-15 2012-07-25 吉林省元隆达工装设备有限公司 Multi-deformed bending forming method and device for pipe fitting
CN102744900B (en) * 2012-06-15 2016-03-09 河南科技大学 A kind of Multifunctional hydraulic press

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JPS59169692A (en) * 1983-03-18 1984-09-25 Nippon Koku Uchu Kougiyoukai Method and device for joining and forming plate
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DE10334660B3 (en) * 2003-07-30 2004-11-04 Theodor Gräbener GmbH & Co. KG 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

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ES2306438T3 (en) 2008-11-01
ATE400377T1 (en) 2008-07-15
KR20070078737A (en) 2007-08-01
DE102006003981A1 (en) 2007-08-09
DE502007000033D1 (en) 2008-08-21
JP2007196292A (en) 2007-08-09
DE102006003981B4 (en) 2010-12-09
EP1813363A1 (en) 2007-08-01

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