WO1999025503A1 - Procede et dispositif pour realiser un embranchement dans un profile creux - Google Patents

Procede et dispositif pour realiser un embranchement dans un profile creux Download PDF

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Publication number
WO1999025503A1
WO1999025503A1 PCT/DE1998/003355 DE9803355W WO9925503A1 WO 1999025503 A1 WO1999025503 A1 WO 1999025503A1 DE 9803355 W DE9803355 W DE 9803355W WO 9925503 A1 WO9925503 A1 WO 9925503A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
hollow profile
pull
slip
producing
Prior art date
Application number
PCT/DE1998/003355
Other languages
German (de)
English (en)
Inventor
Friedhelm GÜNTHER
Christian Wolff-Jesse
Christoph Skudelny
Original Assignee
Mannesmann Ag
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 Mannesmann Ag filed Critical Mannesmann Ag
Priority to DE19881742T priority Critical patent/DE19881742D2/de
Priority to AU18684/99A priority patent/AU1868499A/en
Publication of WO1999025503A1 publication Critical patent/WO1999025503A1/fr

Links

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
    • B21D22/20—Deep-drawing
    • B21D22/24—Deep-drawing involving two drawing operations having effects in opposite directions with respect to the blank
    • 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
    • B21D26/037—Forming branched tubes

Definitions

  • the invention relates to a method for producing a branch on a
  • domes can be produced by an internal high-pressure forming process as a preliminary stage of a branch in thin-walled hollow profiles by means of a hydraulic active medium.
  • the closed nature of the dome can be broken by punching a hole against and / or in the direction of the internal high pressure.
  • the object of the invention is to provide a method for producing a branch on a hollow profile, in which the branch has a defined inner contour.
  • the method according to the invention is characterized in that the known internal high-pressure forming process for forming a dome is followed by an inverted pull directed against the internal high pressure. If you connect the pull-over with a calibration, then you create a defined contact surface that can be used to easily arrange a line, a lever or the like A hole punching can follow the caliber process, but the hole punching can also be an integral part of the caliber
  • a device which consists of a piston which is axially displaceable in a guide-forming recess of the die comprising the hollow profile. This displacement will predominantly take place transversely to the longitudinal axis of the hollow profile Annular piston includes, which are both dependent in the so-called piggyback process or independently
  • Figure 1 in a longitudinal section a first exemplary embodiment of a device designed according to the invention
  • the hollow body 1 to be formed is inserted in a die consisting of two die halves 2, 3 omitted
  • the interior 6 of the hollow body 1 is subjected to high internal pressure p, and after the flow limit has been exceeded, the material flows into the recess 7 provided in the upper die half 3 so that there is no tearing in the lid area 8 of the dome, depending on the degree of shaping the stepped piston 13 explained below is moved in a controlled manner in order to avoid a reduction in the wall thickness in the most heavily loaded curved area 11 of the hollow body 1 Material pushed axially from the outside.
  • the arrows 12, 12 illustrate the axial replenishment.
  • a stepped piston 13 is arranged in the recess 7 of the upper die half 3. This has a guide section 9 adapted to the clear width 14 of the recess 7 and an adjoining, pull-out section 10 having a smaller diameter.
  • the stepped piston 13 is moved axially transversely to the longitudinal axis of the hollow body 1 and presses the cover area 8 of the dome inwards (see FIG. 2).
  • FIG. 2 shows a second in the same longitudinal section as FIG. 1
  • the same reference numerals have been used for the same parts.
  • Arranged in the recess 7 forming a guide is an annular piston 17 which, as the arrows 18 show, is axially displaceable.
  • This annular piston 17 corresponds approximately to the guide section 9 according to the design of the piston in FIG. 1.
  • a piston 15 which is axially displaceable independently thereof is arranged.
  • the displaceability of this piston 15 is indicated by the arrow 16.
  • the lid area 8 of the former dome is pressed inward when the piston 15 moves.
  • the interior 6 of the hollow body 1 remains under a fixed or adapted high internal pressure p ⁇ . This prevents the material from wandering sideways.
  • Figure 3 shows the last step, the calibration.
  • the annular piston 17 After reaching the end position of the piston 15, the annular piston 17 is axially displaced independently of it and presses with its annular end face onto the everted area.
  • a straight flattening 19 is formed, which is favorable for a connection of any kind.
  • a branch is obtained which has a straight and dimensionally accurate inner contour, so that, for example, correspondingly cylindrical elements therein Branch are axially movable.

Landscapes

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

Abstract

L'invention concerne un procédé pour réaliser un embranchement dans un profilé creux, selon lequel une protubérance est formée au moyen d'un milieu actif hydraulique selon un processus de déformation par haute pression intérieure. L'invention se caractérise en ce qu'une opération d'emboutissage par retournement, se faisant à l'encontre de la haute pression intérieure, suit le processus de déformation par haute pression intérieure. L'invention concerne également un dispositif permettant la mise en oeuvre de ce procédé, comportant une matrice (2, 3) entourant le profilé creux (1), dans laquelle est disposé un piston (13), pouvant se déplacer axialement, dans un évidement (7) formant un canal de guidage.
PCT/DE1998/003355 1997-11-14 1998-11-11 Procede et dispositif pour realiser un embranchement dans un profile creux WO1999025503A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19881742T DE19881742D2 (de) 1997-11-14 1998-11-11 Verfahren und Vorrichtung zur Herstellung eines Abzweiges an einem Hohlprofil
AU18684/99A AU1868499A (en) 1997-11-14 1998-11-11 Method and device for producing a bifurcation on a hollow profile section

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997151402 DE19751402A1 (de) 1997-11-14 1997-11-14 Verfahren und Vorrichtung zur Herstellung eines Abzweiges an einem Hohlprofil
DE19751402.2 1997-11-14

Publications (1)

Publication Number Publication Date
WO1999025503A1 true WO1999025503A1 (fr) 1999-05-27

Family

ID=7849285

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/003355 WO1999025503A1 (fr) 1997-11-14 1998-11-11 Procede et dispositif pour realiser un embranchement dans un profile creux

Country Status (3)

Country Link
AU (1) AU1868499A (fr)
DE (2) DE19751402A1 (fr)
WO (1) WO1999025503A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10033771B4 (de) * 2000-07-12 2014-07-10 Volkswagen Ag Verfahren und Vorrichtung zur Herstellung von doppelwandigen Durchbrechungen und Umstülpung eines Durchbruches
DE10162440A1 (de) * 2001-12-19 2003-07-03 Bayerische Motoren Werke Ag Umformpresse
DE602004006956T2 (de) * 2004-03-24 2007-10-18 C.R.F. Società Consortile per Azioni, Orbassano Verfahren und Vorrichtung zum Innenhochdruckumformen eines Hohlkörpers mit mindestens einer Abzweigung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712097A (en) * 1969-12-17 1973-01-23 Tno Device for the manufacture of a branch to a straight tube
JPS55144334A (en) * 1979-04-27 1980-11-11 Nippon Baruji Kogyo Kk Liquid pressure bulging method
US5799524A (en) * 1995-08-16 1998-09-01 Schafer Hydroforming Gmbh & Co. Pressure forming and piercing a hollow body

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712097A (en) * 1969-12-17 1973-01-23 Tno Device for the manufacture of a branch to a straight tube
JPS55144334A (en) * 1979-04-27 1980-11-11 Nippon Baruji Kogyo Kk Liquid pressure bulging method
US5799524A (en) * 1995-08-16 1998-09-01 Schafer Hydroforming Gmbh & Co. Pressure forming and piercing a hollow body

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 005, no. 014 (M - 052) 28 January 1981 (1981-01-28) *

Also Published As

Publication number Publication date
DE19751402A1 (de) 1999-06-02
DE19881742D2 (de) 2000-10-26
AU1868499A (en) 1999-06-07

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