EP2036628B1 - Procédé et dispositif de fabrication d'une pièce à usiner comprenant des courbures à l'aide d'un fluide sous pression - Google Patents

Procédé et dispositif de fabrication d'une pièce à usiner comprenant des courbures à l'aide d'un fluide sous pression Download PDF

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Publication number
EP2036628B1
EP2036628B1 EP08016051A EP08016051A EP2036628B1 EP 2036628 B1 EP2036628 B1 EP 2036628B1 EP 08016051 A EP08016051 A EP 08016051A EP 08016051 A EP08016051 A EP 08016051A EP 2036628 B1 EP2036628 B1 EP 2036628B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
pressure medium
mold
base plate
mold halves
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.)
Not-in-force
Application number
EP08016051A
Other languages
German (de)
English (en)
Other versions
EP2036628A1 (fr
Inventor
Bernd Schulze
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.)
fischer Hydroforming GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2036628A1 publication Critical patent/EP2036628A1/fr
Application granted granted Critical
Publication of EP2036628B1 publication Critical patent/EP2036628B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D26/047—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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material

Definitions

  • the ends of the workpiece sealingly engage in a recess of the hydroforming die enclosing a cone, wherein subsequently a pressure medium for generating an internal pressure in the hollow profile-shaped workpiece to be deformed is fed in by a feed provided in the first mold half.
  • a pressure medium for generating an internal pressure in the hollow profile-shaped workpiece to be deformed is fed in by a feed provided in the first mold half.
  • a corresponding pressure booster is required to increase the internal pressure.
  • the tool halves continue to press together under pressure until the tool is closed, whereby the workpiece has created to realize its final shape of the engraving / negative mold of the tool.
  • a vent hole for the pressure medium is in the second mold half, which may be a virtually incompressible liquid, such as water or a water-oil mixture.
  • a disadvantage of this solution is that the filling of the workpiece cavity with the printing medium as an independent, the cycle time increasing process can be done after inserting the workpiece in the tool, with the ends of the workpiece by moving the mold halves already in its sealing position in the recess the tool halves must be located. There is a risk that the workpiece buckles and comes to rest in the division plane between the tool halves. In addition, a series-steady insertion of the workpieces is not guaranteed because the cones alone do not contribute enough to the orthogonal guidance of the workpiece. Ultimately, the removal of the workpieces causes difficulties in that they can jam in the recess of one of the two mold halves. To increase the internal pressure, a pressure booster is necessary for the direct pressurization.
  • the object of the invention is to propose a solution in which the filling of the cavity of the workpiece with the printing medium as a separate, the cycle time increasing process can be dispensed with, as well as to the already required at this time realization of the sealing position at the ends of the workpiece.
  • a buckling of the workpiece is excluded, created the conditions for a reliable insertion of the workpiece and the trouble-free removal of the workpiece are possible.
  • no pressure booster should be required for the increase of the internal pressure.
  • the advantages of the invention are that can be dispensed with the filling medium of the workpiece with the pressure medium as a separate, the cycle time increasing process, because this when inserting into the already located in the pressure medium of the container lower mold half of the device completely with the print medium is filled.
  • the realization of the sealing position at the ends of the workpiece is not required at this time.
  • a buckling of the workpiece is prevented, created the conditions for a reliable insertion of the workpieces and allows easy removal of the workpieces.
  • a device 1 for producing a bulge 2 ( Fig. 3 ) having workpiece 3 by means of a pressure medium 11.
  • This device 1 consists of two transverse to the longitudinal axis 4 of the workpiece 3 divided tool halves, the lower mold half 5 and the upper mold half 6, which have a later final shape of the workpiece corresponding engraving / negative mold 7.
  • the tool halves 5, 6 are associated with distance springs 8, via which they are each connected to a lower tool base plate 9 and an upper tool base plate 10.
  • the tool base plates 9, 10 cooperate with a press, not shown.
  • the lower tool base plate 9 is associated with a used as a pressure medium 11 incompressible liquid, preferably water, filled container 12, in which at least the workpiece 3 is completely immersed.
  • the lower and upper mold base plates 9, 10 each have a (lower and upper) punch 14, 15 for the mutual engagement in the cavity 13 of the workpiece 3.
  • a channel 16 is arranged in the lower tool base plate 9 and its punch 14.
  • the lower tool base plate 9 includes an inlet and outlet 17 for the incompressible fluid used as the pressure medium 11. This inlet and outlet 17 can also be arranged on the container 12.
  • at least one of the tool halves 5, 6 is equipped with a displacement channel 18 for the pressure medium 11, as a result of which the liquid pressure medium 11 can escape from the space between the workpiece 3 and the engraved / negative mold 7.
  • this displacement channel 18 is arranged in the dividing plane between the two mold halves 5, 6.

Landscapes

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

Claims (7)

  1. Procédé et dispositif de fabrication d'une pièce à usiner (3) comprenant deux courbures à l'aide d'un fluide sous pression (11), ladite pièce à usiner étant une pièce de profil creux qui elle est insérée de façon planimétrique dans un outil de formage consistant de deux moitiés (5, 6) disposées en sens transversal par rapport à l'axe longitudinal, cet outil présentant une gravure/une forme non moulée qui correspond à la forme postérieure et définitive de la pièce à usiner (3) où, après le serrage des deux moitiés d'outil (5, 6), les bouts de la pièce à usiner (3) sont rendus étanches avant d'appliquer à la pièce à usiner (3) une force de compression axiale et où, en augmentant la pression d'un fluide sous pression (11) qui se trouve dans le creux de la pièce à usiner (3), cette pièce à usiner (3) se met, à l'aide d'un liquide incompressible, contre la gravure/une forme non moulée de l'outil de formage afin de prendre sa forma définitive,
    caractérisé en ce
    que la pièce à usiner (3) est insérée dans l'une des deux moitiés (5) de l'outil de formage, que ladite moitié d'outil (5) est située dans un récipient (12) rempli d'un liquide incompressible, en l'occurrence du fluide sous pression (11), de sorte qu'au moins la pièce à usiner (3) sera complètement imbibée et entourée du liquide. Ensuite, les deux moitiés d'outil (5, 6) sont serrées, ce qui fait que les poinçons (14, 15) disposés tant au-dessus des bouts de la pièce à usiner (3) situés dans le creux (13) étanche et engrenant qu'au niveau de la plaque de base supérieure et inférieure de formage (9, 10) commencent à refouler le fluide sous pression (11), que les deux moitiés d'outil (5, 6) gardent, au moyen de ressorts d'écartement (8), une distance déterminée de la plaque de base supérieure et inférieure de formage (9, 10), et que, grâce à une force de compression appliquée à ces ressorts d'écartement (8), les deux moitiés d'outil (5, 6) entrent en contact aussi bien l'une avec l'autre qu'avec la plaque de base de formage (9, 10) respective, ce qui fait que, grâce au refoulement continu du fluide sous pression (11), le procédé de formage ayant pour but la réalisation de la forme définitive de la pièce à usiner (3) soit fini.
  2. Procédé suivant la revendication 2,
    caractérisé en ce
    que le fluide liquide sous pression (11) presque entièrement incompressible est de l'eau.
  3. Dispositif pour fabriquer une pièce à usiner comprenant de courbures à l'aide d'un fluide sous pression, ce dispositif consistant de deux moitiés d'outil (5, 6) disposées en sens transversal par rapport à l'axe longitudinal (4) de la pièce à usiner (3) qui elles présentent une gravure/une forme non moulée (7) correspondant à la forme postérieure et définitive de la pièce à usiner (3).
    caractérisé en ce
    que les deux moitiés d'outil (5, 6) sont dotées de ressorts d'écartement (8) qui eux relient les deux moitiés à une plaque de base supérieure et inférieure de formage (9, 10), la plaque de base inférieure de formage (9) étant munie d'un récipient (12) qui lui est rempli d'un liquide incompressible, en l'occurrence du fluide sous pression (11), dans lequel au moins la pièce à usiner (3) est complètement immergée et où, afin d'assurer l'engrenage dans le creux (13) de la pièce à usiner (3), chacune des plaques de base supérieure et inférieure de formage (9, 10) est équipée d'un poinçon (14, 15).
  4. Dispositif suivant la revendication 3,
    caractérisé en ce
    que dans la plaque de base inférieure de formage (9) et dans son poinçon (14) respectif est disposé un canal (16) pour un clapet de surpression.
  5. Dispositif suivant la revendication 3,
    caractérisé en ce
    que la plaque de base inférieure de formage (9) ou le récipient (12) sont dotés d'un canal d'amenée et de sortie (14) pour le fluide sous pression (11).
  6. Dispositif suivant la revendication 3,
    caractérisé en ce
    qu'au moins l'une des deux moitiés d'outil (5, 6) comprend un canal de refoulement (18) pour le fluide sous pression (11).
  7. Dispositif suivant la revendication 6,
    caractérisé en ce
    que la canal de refoulement (18) est disposé au niveau du plan d'engrenage situé entre les deux moitiés d'outil (5, 6).
EP08016051A 2007-09-12 2008-09-11 Procédé et dispositif de fabrication d'une pièce à usiner comprenant des courbures à l'aide d'un fluide sous pression Not-in-force EP2036628B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007043316A DE102007043316B4 (de) 2007-09-12 2007-09-12 Verfahren und Vorrichtung zur Herstellung eines Ausbuchtungen aufweisenden Werkstückes mittels eines Druckmediums

Publications (2)

Publication Number Publication Date
EP2036628A1 EP2036628A1 (fr) 2009-03-18
EP2036628B1 true EP2036628B1 (fr) 2010-05-05

Family

ID=40223746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08016051A Not-in-force EP2036628B1 (fr) 2007-09-12 2008-09-11 Procédé et dispositif de fabrication d'une pièce à usiner comprenant des courbures à l'aide d'un fluide sous pression

Country Status (4)

Country Link
EP (1) EP2036628B1 (fr)
AT (1) ATE466675T1 (fr)
DE (2) DE102007043316B4 (fr)
ES (1) ES2345853T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009030089B3 (de) * 2009-06-22 2010-11-11 Benteler Automobiltechnik Gmbh Verfahren zur Innenhochdruckumformung
DE102011052888A1 (de) * 2011-08-22 2013-02-28 Benteler Automobiltechnik Gmbh Verfahren zur Umformung eines Hohlprofils für ein Kraftfahrzeug
DE102011116993B4 (de) 2011-10-26 2024-07-25 Cellcentric Gmbh & Co. Kg Verfahren und Vorrichtung zur Herstellung eines metallischen Folienbauteiles, insbesondere einer Brennstoffzellenkomponente
CN102423784A (zh) * 2011-11-08 2012-04-25 哈尔滨工程大学 基于弹性介质的形状记忆合金管接头扩径装置及方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3625040A (en) * 1969-08-06 1971-12-07 Koppy Tool Corp Method and apparatus for forming articles from a tubular blank
DE4017072A1 (de) * 1990-05-26 1991-11-28 Benteler Werke Ag Verfahren zum hydraulischen umformen eines rohrfoermigen hohlkoerpers und vorrichtung zur durchfuehrung des verfahrens
DE4337517A1 (de) * 1993-11-03 1995-05-04 Klaas Friedrich Verfahren zum Innenhochdruck-Umformen von hohlen abgesetzten Wellen aus kaltumformbarem Metall
US6128936A (en) * 1998-09-09 2000-10-10 Kabushiki Kaisha Opton Bulging device and bulging method
TWI267410B (en) * 2002-11-08 2006-12-01 Mitsubishi Motors Corp Deformed element pipe for hydraulic bulging, hydraulic bulging device using the element pipe, hydraulic bulging method using the element pipe, and hydraulic-bulged product
DE10357341B4 (de) * 2003-12-09 2006-02-09 Daimlerchrysler Ag Vorrichtung und Verfahren zur Innenhochdruckumformung eines Rohlings
DE102005036419B4 (de) * 2005-07-29 2015-05-21 Tower Automotive Hydroforming Gmbh & Co. Kg Vorrichtung zur Herstellung ausgebauchter Hohlprofile, insbesondere von Gasgeneratorgehäusen für Airbageinrichtungen

Also Published As

Publication number Publication date
DE102007043316B4 (de) 2009-08-20
EP2036628A1 (fr) 2009-03-18
ATE466675T1 (de) 2010-05-15
DE102007043316A1 (de) 2009-03-19
ES2345853T3 (es) 2010-10-04
DE502008000612D1 (de) 2010-06-17

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