EP0894548A3 - Method and device for forming bulges on elements - Google Patents

Method and device for forming bulges on elements Download PDF

Info

Publication number
EP0894548A3
EP0894548A3 EP98113616A EP98113616A EP0894548A3 EP 0894548 A3 EP0894548 A3 EP 0894548A3 EP 98113616 A EP98113616 A EP 98113616A EP 98113616 A EP98113616 A EP 98113616A EP 0894548 A3 EP0894548 A3 EP 0894548A3
Authority
EP
European Patent Office
Prior art keywords
hollow profile
molding element
secondary molding
punch
counter
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)
French (fr)
Other versions
EP0894548A2 (en
EP0894548B1 (en
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
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 EP0894548A2 publication Critical patent/EP0894548A2/en
Publication of EP0894548A3 publication Critical patent/EP0894548A3/en
Application granted granted Critical
Publication of EP0894548B1 publication Critical patent/EP0894548B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D26/037—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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes 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

Abstract

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Herstellung von Nebenformelementen wie Aushalsungen, Ausbauchungen, erhabenen länglichen Flachstellen und dergleichen an länglichen, umfänglich geschlossenen Hohlprofilen (1) mittels Innenhochdruckumformen. Das Nebenformelement wird durch Aufweiten des Hohlprofiles mit einem in diesem erzeugten Fluidhochdruck lokal ausgeformt und während des Ausformvorganges von einem mit zunehmender Ausformung nach außen ausweichenden Gegenstempel (13) gesteuert abgestützt. Um eine Erweiterung der Verfahrensgrenzen bei der Herstellung eines Nebenformelementes hinsichtlich einer Vergrößerung seiner Höhe prozeßsicher und in einfacher Weise zu erreichen wird vorgeschlagen, daß das Hohlprofil an der Stelle des zu erzeugenden Nebenformelementes von dem Gegenstempel eingestülpt wird, wonach das Hohlprofilmaterial im Bereich (16) der Einstülpstelle (17) durch Fluidhochdruck am Stempel umfänglich und stirnseitig angepreßt wird. Nach dem Einstülpvorgang wird das Hohlprofil unter Innenhochdruck durch Zurückziehen des ständig am Hohlprofil anliegenden Stempels ausgestülpt und das Nebenformelement (11) gebildet.

Figure 00000001
The invention relates to a method and a device for producing secondary shaped elements such as neckings, bulges, raised elongated flat spots and the like on elongated, circumferentially closed hollow profiles (1) by means of internal high pressure forming. The secondary form element is locally formed by widening the hollow profile with a high pressure of fluid generated therein and is supported in a controlled manner during the shaping process by a counter-punch (13) which escapes with increasing form. In order to achieve a process-safe and simple extension of the process limits in the manufacture of a secondary molding element with regard to increasing its height, it is proposed that the hollow profile be inserted at the location of the secondary molding element to be produced by the counter-punch, after which the hollow profile material in the region (16) of the The insertion point (17) is pressed circumferentially and at the end face by high-pressure fluid on the stamp. After the insertion process, the hollow profile is turned out under high internal pressure by pulling back the plunger which is constantly in contact with the hollow profile and the secondary molding element (11) is formed.
Figure 00000001
EP98113616A 1997-08-02 1998-07-22 Method and device for forming bulges on elements Expired - Lifetime EP0894548B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19733474 1997-08-02
DE19733474A DE19733474C2 (en) 1997-08-02 1997-08-02 Method and device for producing secondary shaped elements on hollow profiles

Publications (3)

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

Family

ID=7837804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98113616A Expired - Lifetime EP0894548B1 (en) 1997-08-02 1998-07-22 Method and device for forming bulges on elements

Country Status (4)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10065033C1 (en) * 2000-12-23 2002-07-11 Daimler Chrysler Ag Method for producing a circumferentially closed hollow profile and a device for carrying it out
JP2003118595A (en) 2001-08-06 2003-04-23 Nsk Ltd Vehicular steering device and its manufacturing method
DE10162440A1 (en) * 2001-12-19 2003-07-03 Bayerische Motoren Werke Ag forming press
DE10309625B4 (en) * 2003-03-04 2006-04-13 Audi Ag Method for introducing a side mold into a cavity having a molded part
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 (en) * 2003-12-04 2004-08-26 Daimlerchrysler Ag Hollow strip production device for T-shaped or branched product has tool in form of cutting device with separating slide adjustable transversely to axis of branch
US7563403B2 (en) * 2004-07-02 2009-07-21 Graham Packaging Pet Technologies, Inc. Method of reheat blow molding a container
DE102007007383A1 (en) * 2007-02-12 2008-08-14 Asc Umformtechnik Gmbh Groove or groove-like recess positioning method for motor vehicle, involves introducing pressurized fluid to provide support counteractive to pressing tool, and maintaining fluid for period of forming process to position groove or recess
DE102007017415B4 (en) * 2007-04-13 2016-06-02 Daimler Ag Composite component of a hollow section formed by means of hydroforming and at least one injection-molded element

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928509A (en) * 1987-07-29 1990-05-29 Mitsui & Co., Ltd. Method for manufacturing a pipe with projections
DE9407812U1 (en) * 1994-05-11 1994-07-21 Zeuna Staerker Kg Pipe junction and device for their manufacture

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100936B (en) * 1958-07-26 1961-03-02 Kautex Werke Gmbh Method and device for producing tubes from thermoplastic material
US4510116A (en) * 1983-07-27 1985-04-09 Phillips Petroleum Company Apparatus and method for blow molding
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
DE19508632C2 (en) * 1995-03-10 2002-09-19 Audi Ag Method for connecting a first component to a second component
FR2746339B1 (en) * 1996-03-22 1998-06-05 Plastic Omnium Cie METHOD FOR MANUFACTURING A BEAM OF ATTACHED TUBES, DEVICE FOR CARRYING OUT SUCH A METHOD AND BEAM THUS PRODUCED
US5750067A (en) * 1996-10-07 1998-05-12 Hellbrugge; Luiz Henrique Method for blow molding hollow article with annular chime and deeply recessed ends

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928509A (en) * 1987-07-29 1990-05-29 Mitsui & Co., Ltd. Method for manufacturing a pipe with projections
DE9407812U1 (en) * 1994-05-11 1994-07-21 Zeuna Staerker Kg Pipe junction and device for their manufacture

Also Published As

Publication number Publication date
DE19733474C2 (en) 1999-12-09
EP0894548A2 (en) 1999-02-03
US6143235A (en) 2000-11-07
ES2162376T3 (en) 2001-12-16
DE59801292D1 (en) 2001-10-04
EP0894548B1 (en) 2001-08-29
DE19733474A1 (en) 1999-02-18

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