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WO2004071689A1 - Systeme pour former des pieces sous pression interne elevee - Google Patents

Systeme pour former des pieces sous pression interne elevee Download PDF

Info

Publication number
WO2004071689A1
WO2004071689A1 PCT/EP2004/000383 EP2004000383W WO2004071689A1 WO 2004071689 A1 WO2004071689 A1 WO 2004071689A1 EP 2004000383 W EP2004000383 W EP 2004000383W WO 2004071689 A1 WO2004071689 A1 WO 2004071689A1
Authority
WO
WIPO (PCT)
Prior art keywords
high pressure
pressure
internal high
plate
hydraulic 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.)
Ceased
Application number
PCT/EP2004/000383
Other languages
German (de)
English (en)
Inventor
Thoralf Nehls
Heinz-Rüdiger OTTE
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Priority to EP04703357A priority Critical patent/EP1592525A1/fr
Priority to CA002516115A priority patent/CA2516115A1/fr
Priority to US10/545,664 priority patent/US20070137280A1/en
Publication of WO2004071689A1 publication Critical patent/WO2004071689A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • B21D26/045—Closing or sealing means
    • 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
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/003—Simultaneous forming, e.g. making more than one part per stroke

Definitions

  • the invention relates to a device for hydroforming workpieces according to the preamble of claim 1.
  • a generic device is known from DE 196 14 243 Cl. This describes a device in which a head plate and a base plate are connected to one another by guide columns. While these are anchored at their lower end in the base plate, they penetrate the head plate with their upper end in such a way that it can be moved vertically on the guide rods. Furthermore, lifting cylinders are arranged on the underside of the base plate, by means of which the head plate can be driven in the vertical direction via push rods attached to it.
  • the guide columns are intended to ensure that the lifting or lowering movement of the head plate takes place purely in the vertical direction when the forming tool is opened and closed, so that no transverse forces act on the lifting cylinders.
  • the internal high-pressure forming tool on which the upper die half forms a part, is penetrated by piston rods serving as tie rods, which can be driven by means of hydraulic cylinders with the formation of a tensile force.
  • piston rods serving as tie rods
  • a high pressure corresponding to the internal high pressure prevailing within the internal high pressure forming tool can be applied, so that the two die halves remain pressed against one another against the expanding effect of the internal high pressure.
  • a complex press as was customary in previously known devices for hydroforming, is eliminated.
  • the hydraulic cylinders of the actively working tie rods mentioned require a high volume flow when the forming tool is opened.
  • the closing process is due to the Moving a locking plate is very complex, whereby the grooves in it, which protrude through the piston rods of the tie rods, do not allow full and even contact pressure on the upper half of the die.
  • the mandatory handling of the locking plate also results in longer process times, which make the forming process uneconomical.
  • the conversion of the forming tool is difficult because the piston rods penetrate the tool.
  • different piston rods have to be manufactured for different tools, which leads to a considerable effort and investment.
  • the invention has for its object to develop a generic device in such a way that an economical internal high pressure forming process is made possible in a simple manner.
  • the carrier plate can be moved relative to the head plate in the lifting direction, it only requires a supporting means which is pushed into the gap between the top of the carrier plate and the head plate in the closed position of the forming tool, i.e. when the upper die half comes to rest on the lower one is and bridging the distance between the support plate and head plate. The distance must not change, of course, since otherwise the forming tool will open as a result of the internal high pressure spreading it apart.
  • the support means must therefore inevitably be designed in such a way that it adamantly counteracts the internal high pressure during the entire forming process, as a result of which the distance resulting in the closed position is maintained. In the support position, it is necessary that the support means cover the Tool covering surface of the carrier plate is applied in order to achieve a sufficiently good pressure on the carrier plate on the upper die half and thus on the two die halves.
  • both the design of the tie rods and that of the forming tool is simplified and independent of one another.
  • the forming tool can thus be converted or repaired without a corresponding adjustment of the tie rod design being necessary. Drove by eliminating the striker plate and a required for active spring tie rods pressure control and fluid supply simplifies not only the equipment but also the kinematics of the • opening and closing of the forming tool to be moved pieces of equipment, so that the processing time is shortened and the apparatus and financial Effort for the hydroforming process is considerably reduced, which makes it highly economical for workpieces of all kinds.
  • FIG. 1 is a perspective view of a device according to the invention in the open position of the forming tool
  • Fig. 2 is a perspective view of the device of Fig. 1 in the closed position of the forming tool.
  • a device 1 for hydroforming workpieces which comprises an hydroforming tool 2, which includes an upper die half 3 and a lower die half 4, the cavity 5 of which form the common engraving.
  • the forming tool 2 has means for Generation of a fluidic internal high pressure within the closed die, as well as axial rams 7 which can be moved by hydraulic cylinders 6, by means of which the inserted workpiece is sealed and, during the forming process, hollow profile material is optionally pushed into the engraving from the hollow profile ends.
  • the stamps 7 are arranged obliquely upwards.
  • the device comprises a device for applying the locking force for the internal high-pressure forming tool 2.
  • This device has column-like tie rods 8, by means of which the force flow circuit is closed during the forming process from the opening internal high pressure and counteracting closing force within the forming tool 2.
  • the tie rods 8 are firmly connected at one end to a head plate 9 of the device and at the other end to a base plate 10 of the device, on which base plate 10 the lower die half 4 is attached.
  • the tie rods 8 are thus arranged in a fixed manner and the head plate 9 is firmly positioned.
  • the base plate 10 can be floating so that no bending forces occur in the tie rods 8 that impair the durability of the tie rods 8.
  • tie rods 8 and the head plate 9 move in the direction of stroke
  • the tie rods 8 surround the forming tool 2 so that the resulting generous engagement space a particularly good accessibility to the tool 2 in particular for the unhindered handling of the workpiece when inserting and removing in or from the engraving of the tool 2 is achieved.
  • a support plate 11 is arranged with through openings on the edge, which are penetrated by the tie rods 8 with little play, whereby the Carrier plate 11 on the tie rods 8 is guided along a stroke.
  • the upper die half 3 of the forming tool 2 is fastened to the underside 12 of the carrier plate 11.
  • the carrier plate 11 can thus be moved relative to the head plate 9 in a stroke-movable manner.
  • the carrier plate 11 can be lifted and lowered by an external crane device, for example a manipulator or an external hydraulic cylinder - connected via guide rods - it is advantageous in terms of space savings if the lifting and lowering of the carrier plate 11 is performed by the operator Device itself from.
  • the device 1 includes a first hydraulic cylinder 13, which is centrally attached to the top 14 of the circular head plate 9 and in which a piston rod 15 is guided.
  • the end 16 protruding from the cylinder is connected to the carrier plate 11 via guide rods 17 fastened to the edge thereof, so that the latter can be moved in a stroke-movable manner.
  • several (here: three) horizontally projecting support arms 18 are arranged at the end 16 of the piston rod 15, which are offset symmetrically with respect to one another with respect to the central piston rod end 16 (here: by 120 °) and carry the vertically extending guide rods 17 at their free ends 19.
  • the support arms 18, cables and the like can also take over their function.
  • the device is furthermore coupled to a high-pressure source, via the high pressure of which the halves 3, 4 of the closed die can be pressed against one another during the internal high-pressure forming process and without whose influence the die halves 3, 4 would drift apart in the closed position without counteraction.
  • the device has a supporting means which can be inserted into the intermediate space 20 created in the closed state of the die (FIG. 2) between the lowered support plate 11 and the head plate 9, and the two plates 11 and 9 during the forming process supports each other while maintaining the distance between them.
  • the support means is formed by a second hydraulic cylinder 21 which operates on the plunger principle and which is connected to the high-pressure source.
  • a handling device 22 is integrated in the device 1, which is positioned externally of the device for applying the locking force and the forming tool 2, the support means, i.e. the hydraulic cylinder 21, being vertical on the handling device 22 and via a guide arm 23 is held horizontally movable according to the double arrows shown.
  • the handling device 22 is equipped for changing the position with driving means 24, which can be rollers or runners.
  • driving means 24 can be rollers or runners.
  • the handling device -22 is either variable via rollers or positively guided by means of the runners in cooperation with a rail system, so that the device can be used together with the second hydraulic cylinder 21 at different work stations.
  • the handling device 22 can also have a plurality of guide arms 23 for handling two or more hydraulic cylinders 21, so that a single device 22 can be used simultaneously in a plurality of surrounding work stations, each comprising an internal high-pressure forming tool 2 and a device for applying the locking force. It may also be necessary to insert more than one hydraulic cylinder 21 into the space 20 between the two plates 11 and 9.
  • the hydraulic cylinder 21 After lowering the support plate 11, the hydraulic cylinder 21 is thus pushed into the intermediate space 20 with play, after which it is subjected to a fluid pressure from the inside in its inserted position. As a result, a stamp of the cylinder 21 is extended, which bridges the game still existing until then.
  • the workpiece inserted into the forming tool 2 is placed under high internal pressure, the fluid pressure on the punch correspondingly correspondingly increases in order to prevent an undesired opening of the forming tool 2 which is diverging under the internal high pressure.
  • the hydraulic cylinder 21 forms the link in the force flow circuit of force exertion and force absorption that is open until the sliding position is taken up.
  • the pressure of the second hydraulic cylinder 21 is also released, after which its stamp moves into its non-use position.
  • the hydraulic cylinder 21 is then pulled out of the intermediate space 20 by means of the handling device 22 and the carrier plate 11 is raised by means of the first hydraulic cylinder 13, so that the finished workpiece can be removed and the engraving of the forming tool 2 can be coated with a next workpiece blank.
  • This sequence of work steps of the device 1 can be carried out very quickly due to its simplicity, which leads to very short cycle times of the entire manufacturing process without loss of quality on the finished workpiece.
  • the high-pressure source can be arranged separately from the means for generating the internal high pressure, the pressure exerted being greater than the internal high pressure, so that the tool halves 3, 4 remain pressed against one another during the forming.
  • the high-pressure source of the second hydraulic cylinder 21 also simultaneously forms the means for generating the high fluid pressure, as a result of which a separate pressure control for the hydraulic cylinder 21 is also eliminated, while simplifying the apparatus.
  • the internal high pressure corresponds to the locking pressure applied by the support means, the effective area of the support means being larger than the projected component area of the workpiece to be deformed. This also guarantees that the tool halves 3, 4 abut during the forming.

Landscapes

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

Abstract

La présente invention concerne un système (1) pour former des pièces sous pression interne élevée, au moyen d'un outil de formage sous pression interne élevée (2) et d'un dispositif qui sert à appliquer une force de maintien à l'outil de formage sous pression interne élevée (2). Pour rendre simple et économique le processus de formage sous pression interne élevée, une plaque de support (11) qui porte la moitié de matrice supérieure peut être déplacée selon un mouvement d'élévation par rapport à une plaque de tête (9) du système, et le dispositif présente un moyen d'appui qui peut être introduit dans l'espace intermédiaire (20) formé entre la plaque de support (11) abaissée et la plaque de tête (9) lorsque la matrice est à l'état de fermeture, et qui sert d'appui aux deux plaques (9, 11) au cours du processus de formage tout en maintenant la distance entre celles-ci.
PCT/EP2004/000383 2003-02-14 2004-01-20 Systeme pour former des pieces sous pression interne elevee Ceased WO2004071689A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04703357A EP1592525A1 (fr) 2003-02-14 2004-01-20 Systeme pour former des pieces sous pression interne elevee
CA002516115A CA2516115A1 (fr) 2003-02-14 2004-01-20 Systeme pour former des pieces sous pression interne elevee
US10/545,664 US20070137280A1 (en) 2003-02-14 2004-01-20 Apparatus for forming production parts under internal high-pressure conditions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10306161.4 2003-02-14
DE10306161A DE10306161B4 (de) 2003-02-14 2003-02-14 Einrichtung zum Innenhochdruckumformen von Werkstücken

Publications (1)

Publication Number Publication Date
WO2004071689A1 true WO2004071689A1 (fr) 2004-08-26

Family

ID=32747833

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/000383 Ceased WO2004071689A1 (fr) 2003-02-14 2004-01-20 Systeme pour former des pieces sous pression interne elevee

Country Status (5)

Country Link
US (1) US20070137280A1 (fr)
EP (1) EP1592525A1 (fr)
CA (1) CA2516115A1 (fr)
DE (1) DE10306161B4 (fr)
WO (1) WO2004071689A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1907147A4 (fr) * 2005-07-26 2009-04-29 Aquaform Inc Appareil et procédé pour former des pièces de forme

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1075882A2 (fr) * 1999-08-10 2001-02-14 Müller Weingarten AG Système de verrouillage pour des presses à entraínement hydraulique
DE20019213U1 (de) * 1999-12-14 2001-03-15 Gräbener Maschinentechnik GmbH & Co. KG, 57250 Netphen Vorrichtung zum Innenhochdruckumformen

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106322A (en) * 1976-09-22 1978-08-15 Evgeny Nikolaevich Moshnin Press for pressing pipe fittings
DE4402674A1 (de) * 1994-01-29 1995-08-03 Huber & Bauer Gmbh Vorrichtung zum Innenhochdruckumformen
DE4402673A1 (de) * 1994-01-29 1995-08-03 Huber & Bauer Gmbh Vorrichtung zum Innenhochdruckumformen
DE4434441C2 (de) * 1994-09-27 1997-01-09 Daimler Benz Ag Vorrichtung zum Herstellen von Hohlkörpern nach dem Innenhochdruckumform-Verfahren
US5857368A (en) * 1995-10-06 1999-01-12 Applied Materials, Inc. Apparatus and method for fabricating metal paths in semiconductor substrates through high pressure extrusion
DE19614243C1 (de) * 1996-04-10 1997-07-24 Daimler Benz Ag Vorrichtung zum Aufbringen der Zuhaltekraft für ein Umformwerkzeug beim Innenhochdruckumformen
CA2264388C (fr) * 1996-08-26 2006-05-16 Cosma International Inc. Ensemble de matrice d'hydroformage et methode servant a realiser un formage de tubes aux galets sans retrecissement
DE19809746A1 (de) * 1998-03-06 1999-09-16 Benteler Werke Ag Vorrichtung zur hydraulischen Umformung von metallischen Hohlkörpern
CA2312229C (fr) * 1999-06-21 2007-06-19 Aida Engineering Co., Ltd. Methode et dispositif d'hydroformage
US6889535B1 (en) * 1999-11-17 2005-05-10 Hyfotec Sweden Ab Tool assembly
DE19957888C2 (de) * 1999-12-01 2002-11-14 Benteler Werke Ag Vorrichtung zum hydraulischen Hochdruckformen eines rohrförmigen Bauteils oder einer Platine
US6510720B1 (en) * 2001-10-18 2003-01-28 Hartwick Professionals, Inc. Hydraulic pressure forming using a self aligning and activating die system
US7426845B2 (en) * 2002-11-12 2008-09-23 Magna International Inc. Hydroforming apparatus and method of assembling same
DE602007000441D1 (de) * 2007-05-15 2009-02-12 Fiat Ricerche Vorrichtung und Verfahren zum Innenhochdruckumformen von metallischen Teilen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1075882A2 (fr) * 1999-08-10 2001-02-14 Müller Weingarten AG Système de verrouillage pour des presses à entraínement hydraulique
DE20019213U1 (de) * 1999-12-14 2001-03-15 Gräbener Maschinentechnik GmbH & Co. KG, 57250 Netphen Vorrichtung zum Innenhochdruckumformen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1907147A4 (fr) * 2005-07-26 2009-04-29 Aquaform Inc Appareil et procédé pour former des pièces de forme

Also Published As

Publication number Publication date
US20070137280A1 (en) 2007-06-21
EP1592525A1 (fr) 2005-11-09
DE10306161A1 (de) 2004-08-26
CA2516115A1 (fr) 2004-08-26
DE10306161B4 (de) 2005-02-17

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