EP0894548A2 - Méthode et dispositif de formage de bosselages sur des éléments - Google Patents

Méthode et dispositif de formage de bosselages sur des éléments Download PDF

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Publication number
EP0894548A2
EP0894548A2 EP98113616A EP98113616A EP0894548A2 EP 0894548 A2 EP0894548 A2 EP 0894548A2 EP 98113616 A EP98113616 A EP 98113616A EP 98113616 A EP98113616 A EP 98113616A EP 0894548 A2 EP0894548 A2 EP 0894548A2
Authority
EP
European Patent Office
Prior art keywords
hollow profile
punch
counter
pressure
branch
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.)
Granted
Application number
EP98113616A
Other languages
German (de)
English (en)
Other versions
EP0894548A3 (fr
EP0894548B1 (fr
Inventor
Arndt Birkert
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
Daimler Benz 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, Daimler Benz AG filed Critical DaimlerChrysler AG
Publication of EP0894548A2 publication Critical patent/EP0894548A2/fr
Publication of EP0894548A3 publication Critical patent/EP0894548A3/fr
Application granted granted Critical
Publication of EP0894548B1 publication Critical patent/EP0894548B1/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
    • B21D26/037—Forming branched tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
    • B21C37/29—Making branched pieces, e.g. T-pieces
    • B21C37/294—Forming collars by compressing a fluid or a yieldable or resilient mass in the tube

Definitions

  • the invention relates to a method for producing secondary shaped elements such as neckings, bulges, raised elongated Flat spots and the like on elongated, circumferential closed hollow profiles by means of hydroforming the preamble of claim 1 and a device for Implementation of the method according to the preamble of the claim 6.
  • a generic method or a generic device is known from DE 94 07 812.2 U1.
  • a secondary hollow element in the form of a tubular hollow profile a hollow cylindrical neck is created by the hollow profile inserted in a two-part hydroforming tool and after closing it with one from an externally arranged one High-pressure fluid generating system generated high-pressure fluid is applied on the inside.
  • the according to the course engraving of the hollow profile blank that conforms to the contour Forming tool has a branch into which the hollow profile material under the influence of high pressure together with an axial compression movement following the hollow profile material by applying the hollow profile on the front by means of two axially opposite each other in the engraving towards each other moved pressure stamp with formation of a neck is pushed out.
  • a counter-punch is slidably guided in the branch, which rests on the hollow profile during the entire molding process and with a counter-expansive force Internal pressure directed force acts on the hollow profile, the counter stamp controlled controlled evasive so that the necking does not run suddenly but in a controlled manner.
  • the countermark ensures that the Hollow section material in the cap area of the necking is not excessive thins out so that up to a certain level of necking the formation can run reliably
  • This height the necking depends on the material thinning of the Hollow profile in the mouth area of the branch for engraving, because there - even with a large radius of the bending edge there - one Stripping occurs, and from the material accumulation mentioned in the Cap area.
  • the described method concerns for one reliable process of production only short Hollow profiles, as long hollow profiles in the range of about 1m and longer the frictional forces between the engraving wall and the hollow profile in the axial pushing shown become so large that this without undesired wrinkling of the profile and / or Tears in the profile is no longer possible.
  • the invention has for its object a generic To further develop a method and a generic device, that an extension of the process limits at Production of a secondary form element with regard to an enlargement its height is reliable and achieved in a simple manner can be.
  • the task is according to the invention by the features of the claim 1 regarding the procedure and the characteristics of claim 6 solved with respect to the device.
  • the invention is due to the high pressure system of the hollow profile on the counter-punch in the counter-punch Submitted hollow profile material in the branch area, wherein the maximum material stress in the following less claimed fiber of the material takes place.
  • the hollow profile in the formation of the secondary form element Mouth area of the branch is relieved, since there by the in the branch area submitted material after the first to be made Protuberance of the hollow profile by pulling back the The usual expansion widened only significantly later the hollow profile wall and thus the material thinning occurs.
  • the secondary form element is by expanding the hollow profile with one generated in it High pressure fluid molded, during the molding process the counter stamp evasive towards the outside as the shape increases supports the hollow profile in a controlled manner in the forming area.
  • a hollow profile 1 is shown, which is in the engraving 2 of an internal high pressure forming tool 3 of the invention Device is introduced.
  • the forming tool 3 is in an upper tool 4 and a lower tool 5 divided, the Partition plane 23 between the two tool parts 4 and 5 the horizontal center plane of the hollow profile 1 coincides.
  • the upper tool 4 there is a radial profile on the hollow profile 1 directed recess 6 formed in the engraving 2nd opens and represents a branch of the engraving 2.
  • the cross section the branch can be circular, oval, rectangular or be polygonal, symmetrical or asymmetrical.
  • the Engraving 2 of the hydroforming tool 3 is otherwise fluidly connectable to a high-pressure fluid generating system.
  • a stop body 7 is rigid, that is, immovable arranged, wherein it is pressed into the recess 6 can be or is permanently supported on the back.
  • the stop body 7 hugs the branch wall 8 true to the contour all around and lies with its face facing the engraving 9 from the mouth area 10 of the branch to the engraving 2 by one certain distance back into the recess 6, which the Height of the secondary molded element 11 formed later forms, wherein the stop body 7 the expansion movement of the hollow profile material limited when forming as a stop.
  • the stop body 7 can also be an integral part of the upper tool 4.
  • the stop body 7 has a central passage 12, in the back with a mechanical or hydraulic Drive provided counter punch 13 is guided.
  • the counter-punch 13 has approximately the same cross-sectional shape of the stop body 7 and has the hollow profile on it 1 facing end face 14 a peripheral bevel.
  • the bevel advantageously results in a reliable process Applying the hollow profile material to the counter-punch 13, in which a notch of a sharp edge of the stamp 13 in the hollow profile material and thus susceptibility to cracking during forming is prevented by means of internal high pressure.
  • the end face 14 can also be rounded at the edge be trained.
  • Another conceivable possibility is that the counter punch 13 in cross section the recess 6 of length after filling out.
  • the counter punch is in the closed forming tool 3 13 out of the stop body 7 onto the hollow profile 1, which is arranged in the engraving 2 with little play and turns it over with its end face 14.
  • the counter punch 13 moved out of the stop body 7 this forms with the branch wall 8 by its spacing from it an annular gap, the width of which is suitable Dimensioning - as given in the exemplary embodiment - an annular space 15 can emerge from it.
  • the hollow profile 1 stands during the inversion process or, as shown in Fig. 1b, after completed insertion process under high internal pressure, flows the hollow profile material not only from the insertion point 17 immediately surrounding area 16 of the hollow profile 1 also from the area 18 of the engraving adjoining the branch 2 to the insertion point 17 and places itself on the counter stamp 13 circumferentially and on the front.
  • This will make hollow profile material condensed to the mouth region 10 of the branch, whereby Material of the hollow profile 1 for the formation of the secondary form element 11 and the height of the mold is therefore reliable can be increased.
  • Annulus 15 is hollow profile material at the same time the mentioned application on the counter-stamp in the plunge position 13 past this also from area 16 and 18 in displaced the annular space 15 so that hollow profile material even before the secondary molding element 11 is actually shaped what is present in the molding area 19 for molding synonymous with an additional presentation of hollow profile material and another process-reliable increase the mold height is.
  • the hollow profile 1 Secondary shaped element 11 shaped. This can be done by simply widening take place, which is particularly the case with long hollow profiles due to the friction ratio no axial pushing by attacking on both end faces of the hollow profile Printing stamping is possible, can be used. A pushing in during the expansion at relatively short Hollow profiles, on the other hand, are easily possible, which also material from the hollow profile ends into the shaping region 19 can be supplied, which also increases the Mold height of the secondary mold element 11 contributes.
  • the counter stamp 13 acts as usual the hollow profile 1 during the molding process support in the molding area, see above that the formation of the secondary mold element 11 is controlled.
  • the hollow profile material lays down in the final phase of the molding process at least on the stop body 7 and the branch wall 8 in rough approximation, the counter-stamp 13 is sunk into the stop body 7, so that both of them End faces 14 and 9 are flush with each other (Fig. 1d).
  • the secondary form elements 11 can also be used as neckings or bulges and the like on elongated, circumferentially closed Hollow profiles 1 and can be designed as a flange or Serve mounting surfaces. Here sheet metal parts and their Attachment to a hollow profile can be saved with which this Function is also available.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Forging (AREA)
EP98113616A 1997-08-02 1998-07-22 Méthode et dispositif de formage de bosselages sur des éléments Expired - Lifetime EP0894548B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19733474A DE19733474C2 (de) 1997-08-02 1997-08-02 Verfahren und Vorrichtung zur Herstellung von Nebenformelementen an Hohlprofilen
DE19733474 1997-08-02

Publications (3)

Publication Number Publication Date
EP0894548A2 true EP0894548A2 (fr) 1999-02-03
EP0894548A3 EP0894548A3 (fr) 2000-04-19
EP0894548B1 EP0894548B1 (fr) 2001-08-29

Family

ID=7837804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98113616A Expired - Lifetime EP0894548B1 (fr) 1997-08-02 1998-07-22 Méthode et dispositif de formage de bosselages sur des éléments

Country Status (4)

Country Link
US (1) US6143235A (fr)
EP (1) EP0894548B1 (fr)
DE (2) DE19733474C2 (fr)
ES (1) ES2162376T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008125232A3 (fr) * 2007-04-13 2009-03-12 Daimler Ag Élément composite et procédé et dispositif de fabrication de l'élément composite

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10065033C1 (de) * 2000-12-23 2002-07-11 Daimler Chrysler Ag Verfahren zur Herstellung eines umfänglich geschlossenen Hohlprofiles und eine Vorrichtung zur Durchführung desselben
JP2003118595A (ja) 2001-08-06 2003-04-23 Nsk Ltd 車両用ステアリング装置及びその製造方法
DE10162440A1 (de) * 2001-12-19 2003-07-03 Bayerische Motoren Werke Ag Umformpresse
DE10309625B4 (de) * 2003-03-04 2006-04-13 Audi Ag Verfahren zum Einbringen einer Nebenform in ein einen Hohlraum aufweisendes Formteil
US7153127B2 (en) * 2003-05-15 2006-12-26 Graham Packaging Plastic Products Inc. Method and apparatus for blow molding hollow plastic containers
US20050084648A1 (en) * 2003-10-16 2005-04-21 Olsen Robert F. Process for forming a part having an integral feature, a part produced thereby and apparatus therefor
DE10356535B3 (de) 2003-12-04 2004-08-26 Daimlerchrysler Ag Vorrichtung zum Herstellen eines Hohlprofils
US7563403B2 (en) * 2004-07-02 2009-07-21 Graham Packaging Pet Technologies, Inc. Method of reheat blow molding a container
DE102007007383A1 (de) * 2007-02-12 2008-08-14 Asc Umformtechnik Gmbh Verfahren zum Einbringen einer Kerbe oder einer kerbähnlichen Vertiefung in ein Werkstück aus Metall

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100936B (de) * 1958-07-26 1961-03-02 Kautex Werke Gmbh Verfahren und Vorrichtung zum Herstellen von Tuben aus thermoplastischem Kunststoff
US4510116A (en) * 1983-07-27 1985-04-09 Phillips Petroleum Company Apparatus and method for blow molding
US4928509A (en) * 1987-07-29 1990-05-29 Mitsui & Co., Ltd. Method for manufacturing a pipe with projections
US4938680A (en) * 1988-10-31 1990-07-03 Guarriello Henry J Reverse lip blow molding apparatus
US5202078A (en) * 1991-11-15 1993-04-13 Lerio Corporation Process and apparatus for manufacturing containers with thickened flanges and longitudinal reinforcing ribs and containers thereby
US5469612A (en) * 1993-12-02 1995-11-28 Continental Pet Technologies, Inc. Method for forming a strain-hardenable plastic container
DE9407812U1 (de) * 1994-05-11 1994-07-21 Zeuna-Stärker GmbH & Co KG, 86154 Augsburg Rohrzusammenführung und Vorrichtung zu ihrer Herstellung
DE19508632C2 (de) * 1995-03-10 2002-09-19 Audi Ag Verfahren zum Verbinden eines ersten Bauteiles mit einem zweiten Bauteil
FR2746339B1 (fr) * 1996-03-22 1998-06-05 Plastic Omnium Cie Procede de fabrication d'un faisceau de tubes accoles, dispositif pour la mise en oeuvre d'un tel procede et faisceau ainsi realise
US5750067A (en) * 1996-10-07 1998-05-12 Hellbrugge; Luiz Henrique Method for blow molding hollow article with annular chime and deeply recessed ends

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008125232A3 (fr) * 2007-04-13 2009-03-12 Daimler Ag Élément composite et procédé et dispositif de fabrication de l'élément composite
US9090007B2 (en) 2007-04-13 2015-07-28 Daimler Ag Composite component and a method and device for producing the composite component

Also Published As

Publication number Publication date
EP0894548A3 (fr) 2000-04-19
ES2162376T3 (es) 2001-12-16
DE19733474A1 (de) 1999-02-18
US6143235A (en) 2000-11-07
EP0894548B1 (fr) 2001-08-29
DE59801292D1 (de) 2001-10-04
DE19733474C2 (de) 1999-12-09

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