EP0760264B1 - Dispositif pour le formage hydraulique des pièces tubulaires - Google Patents

Dispositif pour le formage hydraulique des pièces tubulaires Download PDF

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Publication number
EP0760264B1
EP0760264B1 EP95113273A EP95113273A EP0760264B1 EP 0760264 B1 EP0760264 B1 EP 0760264B1 EP 95113273 A EP95113273 A EP 95113273A EP 95113273 A EP95113273 A EP 95113273A EP 0760264 B1 EP0760264 B1 EP 0760264B1
Authority
EP
European Patent Office
Prior art keywords
pressure
sealing mandrel
component
wedge
press
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
EP95113273A
Other languages
German (de)
English (en)
Other versions
EP0760264A1 (fr
Inventor
Otto Buschsieweke
Wolfgang Streubel
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
Priority to ES95113273T priority Critical patent/ES2117340T3/es
Priority to EP95113273A priority patent/EP0760264B1/fr
Priority to DE59502603T priority patent/DE59502603D1/de
Publication of EP0760264A1 publication Critical patent/EP0760264A1/fr
Application granted granted Critical
Publication of EP0760264B1 publication Critical patent/EP0760264B1/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
    • 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
    • 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
    • B21D26/045—Closing or sealing means

Definitions

  • U.S. Patent 4,167,388 discloses one in this connection Arrangement with a mold that is completely between the lower and upper part of a series press incorporated can be.
  • the top moves down are sealing mandrels on the front in the to be deformed Pressed component.
  • Upper die and lower die are fixed in their position.
  • the hydraulic forming medium from a pressure vessel so in the component to be formed and in the adjacent Areas pressed so that it is clamped between two valves becomes. Now by moving one horizontally sliding piston regardless of the displacement options the forming medium under the press Pressure and in this way the component deformed.
  • the invention is based on the prior art Task based on an arrangement for hydraulic forming of tubular components to create with simpler means in a shorter time a more economical one Hydroforming process enables.
  • a major advantage of the invention is that now for the hydroforming process one for normal operation for pressing molded parts from flat material used hydraulic or crank press can be used can.
  • the reason for this is the generation of the hydraulic Forming pressure during the further downward shift of the Press upper part after closing the mold.
  • the cycle time can be hydraulic Forming a component compared to the state of the Technology can be increased by a factor of 10. So it is with serial presses from the existing production a very fast hydroforming process with short cycle times and simple tool production with considerable cost savings achievable.
  • the application of the hydraulic forming pressure inside of the component to be deformed can also at both ends of the component.
  • the A sealing mandrel is provided at each end of the component, which is equipped with a hydraulic pressure chamber and can be moved horizontally when the upper press part is moved as well as when the upper part of the press is moved downwards the hydraulic pressure generated here on the Component transmits.
  • the wedge slide is at least indirectly detachable attached to the press top.
  • the wedge slide does that Vertical movement with.
  • the wedge slide has at the bottom End of a wedge surface that cooperates with a counter wedge surface, at least indirectly on the sealing mandrel assigned pressure piece is provided.
  • the wedge slide is therefore through the press upper part shifted downwards, so in the last phase of the The wedge surface and the counter-wedge surface are closed by the mold in contact, with the relative displacement of the wedge slide and thrust piece of the sealing mandrel horizontally is shifted.
  • the design of the wedge surface is like this made that after separating the wedge surface from the Counter wedge surface of the sealing mandrel reaches the position has in which its sealing end the material of the Component perfectly sealed against the walls of the upper die and lower die. This sealing situation becomes apparent during the forming process maintain that the wedge slide at and after pressing the sealing mandrel into the component end supports an abutment, which on the stationary press lower part can be fixed releasably.
  • the sealing mandrel is advantageously stored in a housing that is at least indirectly on the lower press part can be set.
  • the housing is located between the mold and the wedge slide or its Abutment.
  • the sealing mandrel is in a bore of the Housing sealed.
  • In the housing is above this Bore a pressure intensifier in the form of a piston-cylinder unit intended.
  • the cylinder of the Pressure intensifier as a bore open at the top trained in a piston with piston rod vertically is tightly displaceable.
  • the cylinder stands over a vertical channel with a cross hole in the sealing mandrel, which in turn in an axial channel in the sealing mandrel opens, which is between the pressure chamber and the sealing face of the sealing mandrel extends.
  • the piston rod of the pressure intensifier is at least indirect placed under the influence of the upper press part.
  • a pressure pin can be used with the upper press part releasably coupled, which with the piston rod cooperates.
  • the relative position of the pressure pin and piston rod is like this designed that the piston in the pressure intensifier only then relocated downwards and this creates a hydraulic pressure when the sealing mandrel moves the component end together Mold properly sealed Has.
  • the molding tool with the springs and the counter bracket, the housing with the sealing mandrel and pressure intensifier and thrust pin as well as the wedge slide with its abutment combined into a complete tool unit can be.
  • the lower die is then expedient, the housing and the abutment on a base plate releasably attached to the press lower part can be set.
  • the counter bracket, the pressure pin and the wedge slide can be released on a pressure plate attached, which are releasably fixed to the press top can.
  • the invention is based on one in the drawing schematically illustrated embodiment explained in more detail.
  • crank press 1 with a tool unit is designated, as a whole transportable and storable and on the one hand on the lower press part 2 and on the other hand on the upper press part 3 an otherwise not illustrated crank press is releasably fixable.
  • the tool unit 1 has a molding tool 4 with a Lower die 5 and an upper die 6.
  • the middle part of the Component 8 expanded in diameter.
  • a housing 11 is arranged next to the molding tool 4, in which a sealing mandrel 12 can be moved horizontally is stored.
  • the movability is indicated by the double arrow PF marked.
  • the sealing mandrel 12 settles from a pressure piece 13 with a counter wedge surface 14, a cylindrical middle part 15, a conical length section 16 and a subsequent, in Compared to the central part 15 in diameter kept smaller cylindrical end portion 17 together.
  • the middle part 15 is by peripheral seals 18 in one Bore 19 of the housing 11 mounted sealingly.
  • Adjacent to the pressure piece 13 is in the sealing mandrel 12 hydraulic pressure chamber 20 sealed by a Cover 21 is closed towards the pressure piece 13.
  • the Seal is designated 22. Between the pressure chamber 20 and the end face 23 of the sealing mandrel 12 extends an axial channel 24.
  • the pressure intensifier 25 has an open top Cylinder 26 in which a piston 27 is sealed is slidably mounted. With the piston 27 is in Piston rod with a slightly smaller diameter 28 connected, which is in the lowest position of the Piston 27 protrudes over the head side 29 of the housing 11.
  • the cylinder 26 is in the vertical channel 30 Housing 11 with a radial bore 31 in the sealing mandrel 12 connected when the sealing mandrel 12 in the in Drawing shown sealing and forming layer is located.
  • an insertion bevel 35 for the wedge slide 34 is provided.
  • the wedge slide 34 is on an upper pressure plate 37 releasably attached, which in turn releasably on the upper press part 3 is set.
  • the vertical mobility of the Wedge slide 34 is identified by the double arrow PF1.
  • a pressure pin 38 on the pressure plate 37 releasably set.
  • a counter bracket releasably attached to the pressure plate 37 39. This can be carried over compression springs 40, but relatively movable with the upper die 6 of the Forming tool 4 coupled.
  • the contour 7 lies in the Lower die 5 is free and it can be a tubular component 8 be inserted into the lower die 5.
  • the thrust pin With further downward displacement, the thrust pin also receives 38 contact with the piston rod 28 so that when lowering the upper press part 3 with relative displacement of mold 4 and counter bracket 39 (due to the Compression springs 40) pressure fluid through the pressure intensifier 25 generated and via the vertical channel 30, the radial bore 31 and the axial channel 24 in the sealing mandrel 12 in the to be deformed Component 8 pressed and this in the middle length section the contour 7 in the lower die 5 and upper die 6 adapted to form a deformed component 43 becomes.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Punching Or Piercing (AREA)

Claims (1)

  1. Dispositif de formage de composants de forme tubulaire (8) à l'aide d'une pression hydraulique intérieure, qui comporte un outil (4), qui peut être intégré dans une presse (2,3) comportant une partie supérieure mobile verticalement (3) et une partie inférieure fixe (2) et est équipé d'un plateau de presse supérieur (37), d'un plateau de base inférieur (36), d'une matrice supérieure (6), d'une matrice inférieure (5), et dans lequel au moins un mandrin d'étanchéité (12), qui est utilisé pour le transfert du fluide de formage et comporte un canal longitudinal, peut être repoussé frontalement dans le composant (8), dont l'axe longitudinal est aligné horizontalement, par un poussoir à coin (34), qui prend appui sur une butée (32) reliée à la plaque de base (36), caractérisé par les caractéristiques suivante :
    a) le mandrin d'étanchéité (12) est monté de manière à être déplaçable horizontalement dans un boítier (11) fixé sur la plaque de base (2);
    b) le mandrin d'étanchéité (12) possède un élément de compression (13), qui est situé entre la butée (32) et le boítier (11) et qui dispose d'une surface en coin antagoniste (14), qui coopère avec une surface en coin (33) formée sur le poussoir à coin (34);
    c) dans le mandrin d'étanchéité (12) est prévue une chambre de pression (20) pour un milieu fluidique de formage, qui est reliée d'une manière transmettant le fluide à un cylindre (26), qui guide verticalement un piston (27) et est formé dans le boítier (11), en tant que composant d'un convertisseur de pression (25);
    d) la chambre de pression (20) possède une surface de compression (44), qui est supérieure à la surface de compression (45) présente sur la face frontale (23), repoussée dans le composant (8), du mandrin d'étanchéité (12);
    e) le piston (27) peut être abaissé par le plateau de pression (37);
    f) le plateau de pression (37), qui peut être fixé sur la partie supérieure (3), sert à fixer le poussoir à coin (34), un embout de compression (38), qui charge le piston (27), ainsi qu'un dispositif de retenue de contre-pression (39) relié par l'intermédiaire de ressorts (40) à la matrice supérieure (6).
EP95113273A 1995-08-24 1995-08-24 Dispositif pour le formage hydraulique des pièces tubulaires Expired - Lifetime EP0760264B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES95113273T ES2117340T3 (es) 1995-08-24 1995-08-24 Dispositivo para la conformacion hidraulica de componentes tubulares.
EP95113273A EP0760264B1 (fr) 1995-08-24 1995-08-24 Dispositif pour le formage hydraulique des pièces tubulaires
DE59502603T DE59502603D1 (de) 1995-08-24 1995-08-24 Vorrichtung zur hydraulischen Umformung von rohrförmigen Bauteilen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95113273A EP0760264B1 (fr) 1995-08-24 1995-08-24 Dispositif pour le formage hydraulique des pièces tubulaires

Publications (2)

Publication Number Publication Date
EP0760264A1 EP0760264A1 (fr) 1997-03-05
EP0760264B1 true EP0760264B1 (fr) 1998-06-17

Family

ID=8219550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113273A Expired - Lifetime EP0760264B1 (fr) 1995-08-24 1995-08-24 Dispositif pour le formage hydraulique des pièces tubulaires

Country Status (3)

Country Link
EP (1) EP0760264B1 (fr)
DE (1) DE59502603D1 (fr)
ES (1) ES2117340T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19911364C2 (de) * 1999-03-15 2001-11-15 Meleghy Hydroforming Gmbh & Co Verfahren und Vorrichtung zur Abdichtung der Enden von Hohlprofilen beim Innenhochdruckumformverfahren
DE102004011253B3 (de) * 2004-03-09 2005-05-19 Daimlerchrysler Ag Innenhochdruckumformanlage
DE102004054324A1 (de) * 2004-11-10 2006-05-24 Joachim Hermann Schondelmaier Verfahren und Vorrichtung zum Verformen von Werkstücken
DE102005036419B4 (de) * 2005-07-29 2015-05-21 Tower Automotive Hydroforming Gmbh & Co. Kg Vorrichtung zur Herstellung ausgebauchter Hohlprofile, insbesondere von Gasgeneratorgehäusen für Airbageinrichtungen
CN111715766B (zh) * 2020-06-17 2021-06-04 大连理工大学 一种薄壁金属管件气液混合胀形专用模具

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5489970A (en) * 1977-12-27 1979-07-17 Tokyo Puresu Kougiyou Kk Buldge molding
US4167388A (en) * 1978-05-01 1979-09-11 United Technologies Corporation Apparatus for forming hollow members
US5233854A (en) * 1992-05-11 1993-08-10 General Motors Corporation Press apparatus for hydroforming a tube

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Shorter Oxford English Dictionary, Reprint 1991, Seite 885. *

Also Published As

Publication number Publication date
ES2117340T3 (es) 1998-08-01
DE59502603D1 (de) 1998-07-23
EP0760264A1 (fr) 1997-03-05

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