EP1216769B1 - Pocédé et dispositif de fabrication d' un profilé creux fermé - Google Patents

Pocédé et dispositif de fabrication d' un profilé creux fermé Download PDF

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Publication number
EP1216769B1
EP1216769B1 EP01129173A EP01129173A EP1216769B1 EP 1216769 B1 EP1216769 B1 EP 1216769B1 EP 01129173 A EP01129173 A EP 01129173A EP 01129173 A EP01129173 A EP 01129173A EP 1216769 B1 EP1216769 B1 EP 1216769B1
Authority
EP
European Patent Office
Prior art keywords
membrane
blank
hollow profile
tool
pressure
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
EP01129173A
Other languages
German (de)
English (en)
Other versions
EP1216769A3 (fr
EP1216769A2 (fr
Inventor
Kai-Uwe Dudziak
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
Publication of EP1216769A2 publication Critical patent/EP1216769A2/fr
Publication of EP1216769A3 publication Critical patent/EP1216769A3/fr
Application granted granted Critical
Publication of EP1216769B1 publication Critical patent/EP1216769B1/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
    • B21D26/021—Deforming sheet bodies
    • 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
    • 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
    • B21D26/027—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
    • B21D26/021—Deforming sheet bodies
    • B21D26/031—Mould construction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure

Definitions

  • the invention relates to a method for producing a perimeter closed hollow profiles according to the preamble of Patent claim 1 and an apparatus for carrying it out according to the preamble of claim 9.
  • a generic method or a generic device is known from EP 0913 277 A1.
  • Suspension arm of a suspension removable consisting of a tube is manufactured by hydroforming.
  • the wishbone has various cross-sectional shapes, one being a flattened Represents rectangle.
  • To form this form is the circular cylindrical pre-bent tube in a two-part hydroforming inserted and during the closing process squeezed together by the two die parts. Subsequently, will when the tool is closed, the tube is widened by means of internal high pressure, until it is true to the Gesenkgravur contour true and thus to obtain the desired rectangular flat final shape.
  • the contour of the support surface of the stamp unchangeable, so that the plant of the tube - be during the squeezing process or during the expansion phase - is not evenly distributed at any time, which is too uneven Supporting the pipe leads and therefore to the failure of the Pipe at this supported point or in the adjacent Areas contributes to the backstop.
  • the invention is based on the object, a generic Method and a corresponding generic device to the effect to further develop that in a simple way a production a hollow section is made possible in the case of large Expansions of the hollow profile (greater than or equal to the Breaking strain of the material) the process safety in sufficient Dimensions is guaranteed.
  • the membrane becomes a flexible counterholder formed, which can be any shape of the hollow section blank during expansion and also in others Forming processes true to contour and over a relatively large area adjust large partial circumference of the hollow section blank can.
  • the contour-matching achieved by the external pressurization Expansion and support force of the membrane can by very easy to handle control parameters of printing be exactly adapted to the transformation progress. All in all, So by the large-scale plant - when using several circumferentially more distributed membrane circumferentially more complete Plant - during each forming phase and by the exact Stitzkraftdostechnik receives the reshaped hollow section blank always the appropriate uniform support force, which is a failure prevents the blank material during expansion.
  • a device 1 for producing a circumferential closed flattened hollow profiles 2 (FIG. 4) are shown, essentially divided into two lateral tools Hydroforming die, a membrane 12 and a Flatten device exists.
  • the side tools can each be integrally formed, wherein a pressure medium supply 20 is incorporated there.
  • the lateral ones Tools also in several parts, in an upper side tool 3 and a lower side tool 4, be executed, wherein in the parting line of the two side tools 3 and 4, the Print medium supply 20 can run.
  • For equipping the forming tool with a blank 10 is to use a manipulator the blank 10 until the two pairs of side tools 3,4 have closed like a baking around the blank 10. After reshaping, the finished hollow section in easy way when moving apart the side tools.
  • the flattening device the pair of side tools. 3 and / or the pair of side tools 4 by means of a corresponding designed engraving itself may be included in the present Embodiment
  • a single Stamp it is also conceivable the use of a single Stamp.
  • the punches 6 and 7 can be adapted to the longitudinal extent of hydroforming and thus to the entire deformable part of the hollow section blank 10 throughout trained or alternatively only locally to act on a Part of the blank 10 may be arranged.
  • the stamps 6.7 have a flat end face, so on the one hand the required flat shape of the hollow section 2 is achieved and on the other hand, on the blank 10 no hazardous to process Notches due to sharp-edged unevenness of the stamp surface arise.
  • an elastic membrane 12 for example made of an elastomer or a rubber, attached.
  • the attachment of the membrane 12 can be carried out in many ways be, for example, insoluble by gluing, screwing, Annieten and the like.
  • the membrane 12 in an advantageous manner when worn interchangeable both transverse to the longitudinal extent of the tool and parallel to the punches 6 and 7 lying flange-like ends 13 in each case a holder 14 was added.
  • the holder 14 is detachable on the inside 11 of the tool attached, wherein the holder 14 is open to the inside 11 has the receptacle for the membrane 12 forming recess 15, between the walls and the opposite wall portion 16 of the tool inside 11, the membrane flanges 13 are trapped.
  • the shape of the Membrane 12 is in the inside 11 of the tool a longitudinal the middle part 17 of the membrane 12 extending recess 18th incorporated to accommodate the diaphragm 12 so far that in the Non-use position of the membrane 12 and in the last forming phase of the blank 10 of the mold space 9 membrane-free and thus the membrane 12 on the one hand when loading the mold space 9 with a blank 10 is not a hindrance and the other during pull back the forming of the blank 10 from the mold space 9 can.
  • the recess bottom 19 opens a channel-like pressure medium supply 20 off, with one located outside the tool Pressure generator is connected.
  • the membrane 12 covers thus the recess 18 including the mouth of the print medium supply 20 high pressure-tight, whereby upon introduction of the pressure medium between the recess base 19 and facing this Outside 21 of the membrane 12, a pressure chamber 22 is formed becomes. Due to the formation of the recess 18 of the over the pressure medium mediated pressure evenly over the entire - with the exception of the clamped flanges 13 - membrane 12 distributed, so that local damage-induced strains of the membrane 12 avoided when pressurized and the desired Appendix to the hollow section blank 10 sufficiently over a partial circumferential area of the blank 10 can be achieved.
  • the Although pressure medium may be gaseous, it is due here its incompressible properties when supporting during the forming of the blank 10 are very advantageous a pressurized fluid.
  • the hydroforming instead of side tools 3,4 a and a lower tool, whereby the loading of the Form space 14 can be relatively simple.
  • the membrane 12th the upper tool connects to the lower tool, the Membrane 12 stretched when opening and closing the tool and compressed, whereby the membrane 12 an increased wear is exposed.
  • this can be achieved by a removable only the mold space covering lid part in the upper tool be circumvented, the membrane 12 in the opening and Closing movement of the forming tool remains unclaimed.
  • a first Flattening of the blank 10 done, which in the flattened Condition then expanded by means of hydroforming becomes.
  • the Membrane 12 everts and expands to the blank 10, until the membrane 12 fits snugly against this on a partial circumference area.
  • the punch 6,7 to each other drive and thus reduce the cavity 9, the blank 10 squeezed and in the width direction to the recess 18th widened.
  • the pressure in the pressure chamber 22 must be reduced to allow this broadening. This gives way to the elastic Membrane 12 from the mold space 9 in its recess 18th back until they completely leave the field of action of the punch 6.7 Has.
  • the membrane 12 remains at elevated pressure from the pressure chamber 22nd then acts on the side of the punch 6,7 stand and support the blank 10 so that on this one with the stamp outside 23 flush final wall 24 are formed can.
  • the achieved flush is from the requirement to the Cross-sectional shape (here: rectangular cross-section) depends.
  • the membrane 12 is pressurized from the pressure chamber 22, Which thereby at a partial peripheral area of the blank 10th and applies to a portion of the punch faces 5 (Fig. 2).
  • a fluidic internal high pressure is then the blank 10 widened, wherein throughout the entire Expansion of the membrane 12 pressurized to the blank 10 is pressed on said partial circumference area.
  • the membrane 12 supports this there material-soothing and form-retaining, so that the expansion phase is completely reliable (FIG. 3).
  • the membrane 12 urges the membrane 12 to Pressure chamber 22 out back, with increasing degree of expansion of the Support pressure in the pressure chamber 22 continuously adapted reduced becomes.
  • the membrane 12 during the expansion of the blank 10 occurs no or a very low friction of the Blank material on the membrane 12, as these are not solid is and elastically mitverformt.
  • the diameter of the blank 10 is roughly approximated after completion of expansion as big as the punch width.
  • the punches are 6,7 in the arrow direction driven towards each other, whereby the expanded blank 10 is compressed.
  • the blank 10 is not inevitably be supported by the membrane 12 and under a fluidic support pressure, which is smaller than the expansion pressure It can be, has to stand, it is for further process security advantageous if this is given.
  • the blank 10 wrinkle-free in a flattened final shape of the circumferentially closed Hollow sections 2 pressed with rectangular cross-section.
  • the blank 10 is thereby further widened without damage, until it has taken the final shape.
  • the flattening-related Broadening complements that created by the expansion Main part of the whole broadening. According to FIG.
  • the blank 10 steadily supported and during the flattening pressurized by the membrane 12 such that upon reaching the flush of the flattened blank 10 with the outside 23 of the punch 6.7, the lateral end contour of the hollow section. 2 is trained.
  • the middle part 17 of the membrane 12 lies here along the outside 23 of the punch 6.7. Also in the flattening the pressure in the pressure chamber 22 is successively reduced, so that the membrane 12 until reaching the level of the Final contour of the hollow section 2 supporting wall 24 with the punch outside 23 can withdraw elastically.
  • the device of the invention allows compared to previous Processes that two in the shaping direction different manufacturing steps, usually in two Manufacturing stages would have to be produced, in a hydroforming operation can be represented. Furthermore, you can with the flexible membrane 12 workpieces with widenings to be realized, due to their geometric design and the associated friction between the workpiece and tools can not be transformed process-safe. For example It may be at the mentioned workpieces for a long time IHU components act, the narrow tapered expansion areas must have, as in the motor vehicle body of the under the windbreak extending cross member.

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

Claims (17)

  1. Procédé de fabrication d'un profilé creux fermé en périphérie, selon lequel une ébauche de profilé creux est élargie, au moyen d'une haute pression fluidique intérieure, dans un outil de reformage sous haute pression intérieure, suite à quoi l'ébauche atteint la forme finale du profilé creux
    caractérisé en ce que
    l'ébauche de profilé creux (10) est soutenue , sur au moins une zone périphérique partielle, pendant l'opération d'élargissement, au moyen d'au moins une membrane (12) qui est fixée sur la face intérieure (11) de l'outil, tournée vers l'ébauche (10), et qui peut être sollicitée par une pression, pouvant être commandée et agissant depuis l'extérieur, cette membrane reprenant élastiquement sa forme lorsque l'opération d'élargissement progresse, ceci s'accompagnant d'une réduction de la pression de soutien agissant sur la membrane (12).
  2. Procédé selon la revendication 1, caractérisé en ce que l'ébauche de profilé creux (10) est aplatie dans l'outil de reformage sous haute pression intérieure.
  3. Procédé selon l'une des revendications 1 et 2, caractérisé en ce que l'ébauche de profilé creux (10) est soutenue par la membrane (12) sur la totalité de son étendue longitudinale.
  4. Procédé selon l'une des revendications 2 et 3, caractérisé en ce que l'ébauche de profilé creux (10) est, en plus, soutenue par la membrane (12) pendant le processus d'aplatissement.
  5. Procédé selon l'une des revendications 2 à 4, caractérisé en ce que, d'abord, est effectué un élargissement libre de l'ébauche de profilé creux (10), jusqu'à ce que celle-ci entre en contact avec un dispositif d'aplatissement (6, 7) de l'outil de reformage sous haute pression intérieure, et en ce qu'ensuite l'aplatissement de l'ébauche (10) ayant été élargie est effectué, ce qui est accompagné par un soutien permanent de l'ébauche (10) par la membrane (12).
  6. Procédé selon la revendication 5, caractérisé en ce que l'ébauche (10) est sollicitée en pression par la membrane (12), de manière que, à l'atteinte de l'affleurement entre l'ébauche (10) aplatie et la face extérieure (23) du dispositif d'aplatissement (6, 7) du genre d'un poinçon, le contour final latéral du profilé creux (2) soit formé.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce qu'enfin l'ébauche de profilé creux (10) est calibrée à la forme finale du profilé creux (2), par application d'une haute pression intérieure,dépassant celle de la pression d'élargissement.
  8. Procédé selon l'une des revendications 5 et 6, caractérisé en ce que l'aplatissement est effectué directement à la forme finale du profilé (2) par application d'une haute pression intérieure, soutenant l'ébauche de profilé creux (10) depuis l'intérieur, cette haute pression intérieure étant de valeur inférieure à la pression d'élargissement.
  9. Dispositif de fabrication d'un profilé creux fermé en périphérie, avec un outil de reformage sous haute pression intérieure, dans lequel une ébauche de profilé creux est susceptible d'être élargie par application d'une haute pression fluidique intérieure, caractérisé en ce que, sur la face intérieure de l'outil (11), est fixée au moins une membrane (12) élastique, s'étendant sur le côté du champ d'emprise du poinçon (6, 7), membrane qui recouvre, de façon étanche aux hautes pressions, une amenée de milieu sous pression (20) reliée à un générateur de pression se trouvant à l'extérieur de l'outil, l'amenée de milieu sous pression s'étendant sous forme de canal à travers l'outil et débouchant vers l'enceinte de formage (9) sur son côté intérieur (11) est susceptible d'être appliquée sur l'ébauche de profilé creux (10) à reformer, en au moins une zone périphérique partielle, en étant sollicitée en pression, par l'amenée de milieu sous pression (20).
  10. Dispositif selon la revendication 9, caractérisé en ce que le dispositif contient un dispositif d'aplatissement, qui est intégré à l'outil de reformage sous haute pression et au moyen duquel l'ébauche de profilé creux (10) est susceptible d'être aplatie.
  11. Dispositif selon la revendication 10, caractérisé en ce que le dispositif d'aplatissement est formé d'au moins un poinçon (6, 7), guidé en translation dans un guide traversant (8) de l'outil.
  12. Dispositif selon l'une des revendications 9 à 11, caractérisé en ce que la membrane (12) s'étend le long de la totalité de l'enceinte de formage (9) de l'outil.
  13. Dispositif selon l'une des revendications 9 à 12, caractérisé en ce que la membrane (12) est logée aux deux extrémités (13), situées transversalement par rapport à l'étendue longitudinale de l'outil, chaque fois dans un support (14), disposé sur la face intérieure (11) de l'outil.
  14. Dispositif selon la revendication 13, caractérisé en ce que la membrane (12) est bloquée par serrage, entre la face intérieure de l'outil (11) et une paroi du logement du support.
  15. Dispositif selon l'une des revendications 9 à 14, caractérisé en ce que le milieu sous pression, sollicitant la membrane vers l'ébauche de profilé creux (10), est un fluide sous pression.
  16. Dispositif selon l'une des revendications 11 à 15, caractérisé en ce que le poinçon (6, 7) présente une face frontale plane.
  17. Dispositif selon l'une des revendications 9 à 16, caractérisé en ce que, dans la face intérieure de l'outil (6, 7), est usiné un évidement (18), s'étendant le long de la membrane (12), qui est couvert par la membrane (12) et dans lequel débouche l'amenée de milieu sous pression (20) et en ce que, entre le fond d'évidement (19) et la face extérieure (21), tournée vers celui-ci, de la membrane (12) peut être réalisée une enceinte à pression (22).
EP01129173A 2000-12-23 2001-12-08 Pocédé et dispositif de fabrication d' un profilé creux fermé Expired - Lifetime EP1216769B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10065033 2000-12-23
DE10065033A DE10065033C1 (de) 2000-12-23 2000-12-23 Verfahren zur Herstellung eines umfänglich geschlossenen Hohlprofiles und eine Vorrichtung zur Durchführung desselben

Publications (3)

Publication Number Publication Date
EP1216769A2 EP1216769A2 (fr) 2002-06-26
EP1216769A3 EP1216769A3 (fr) 2003-11-19
EP1216769B1 true EP1216769B1 (fr) 2005-10-12

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ID=7668996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01129173A Expired - Lifetime EP1216769B1 (fr) 2000-12-23 2001-12-08 Pocédé et dispositif de fabrication d' un profilé creux fermé

Country Status (4)

Country Link
US (1) US6634198B2 (fr)
EP (1) EP1216769B1 (fr)
CA (1) CA2366209C (fr)
DE (2) DE10065033C1 (fr)

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US6892560B2 (en) * 2000-06-16 2005-05-17 Toyota Jidosha Kabushiki Kaisha Mold clamping apparatus and mold clamping method
DE10121787C1 (de) * 2001-05-04 2002-07-11 Daimler Chrysler Ag Verfahren und Vorrichtung zur Herstellung von Nebenformelementen
WO2003095122A1 (fr) * 2002-05-08 2003-11-20 Flow Holdings Sagl Dispositif et procede de formage par expansion
DE102005013689B3 (de) * 2005-03-21 2006-01-05 Forschungsgesellschaft Umformtechnik Mbh Vorrichtung und Verfahren zum Trennen oder Lochen eines nach dem Innenhochdruckumformverfahren hergestellten Werkstücks
DE102006012625C5 (de) * 2006-03-20 2010-06-17 Audi Ag Verfahren zur Herstellung von Profilen
US7827838B2 (en) * 2008-05-05 2010-11-09 Ford Global Technologies, Llc Pulsed electro-hydraulic calibration of stamped panels
CN110450268B (zh) * 2019-09-12 2024-07-12 广东金马领科智能科技有限公司 高压注浆成型生产线、成型方法及***
CN116944329B (zh) * 2023-09-21 2023-12-12 太原理工大学 一种基于冲击液压原理用于板材加工的超高速成形装置

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US3888098A (en) * 1974-02-27 1975-06-10 Boeing Co Liquid metal core transpactor elements for electromagnetic forming tools
US4840053A (en) * 1987-07-29 1989-06-20 Mitsui & Co., Ltd. Method for manufacturing a pipe with projections
DE4201819A1 (de) * 1991-01-28 1992-07-30 Mannesmann Ag Verfahren und vorrichtung zum hydraulischen aufweiten von rohrfoermigen hohlprofilen
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BR9810899A (pt) * 1997-07-18 2000-09-26 Cosma Int Inc Processo de formar um menbro metálico tubular alongado, e, equipamento para formar uma peça metálica tubular em um membro metálico tubular alongado.
DE19733474C2 (de) * 1997-08-02 1999-12-09 Daimler Chrysler Ag Verfahren und Vorrichtung zur Herstellung von Nebenformelementen an Hohlprofilen
JP3206505B2 (ja) * 1997-08-06 2001-09-10 住友金属工業株式会社 金属管の液圧バルジ加工方法および液圧バルジ加工装置
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DE10121787C1 (de) * 2001-05-04 2002-07-11 Daimler Chrysler Ag Verfahren und Vorrichtung zur Herstellung von Nebenformelementen

Also Published As

Publication number Publication date
DE10065033C1 (de) 2002-07-11
DE50107673D1 (de) 2005-11-17
CA2366209C (fr) 2006-10-24
EP1216769A3 (fr) 2003-11-19
CA2366209A1 (fr) 2002-06-23
EP1216769A2 (fr) 2002-06-26
US6634198B2 (en) 2003-10-21
US20020088263A1 (en) 2002-07-11

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