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DE19802685A1 - Process for producing an elongated hollow body and its use - Google Patents

Process for producing an elongated hollow body and its use

Info

Publication number
DE19802685A1
DE19802685A1 DE19802685A DE19802685A DE19802685A1 DE 19802685 A1 DE19802685 A1 DE 19802685A1 DE 19802685 A DE19802685 A DE 19802685A DE 19802685 A DE19802685 A DE 19802685A DE 19802685 A1 DE19802685 A1 DE 19802685A1
Authority
DE
Germany
Prior art keywords
hollow body
elongated hollow
producing
components
board
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.)
Withdrawn
Application number
DE19802685A
Other languages
German (de)
Inventor
Egon Dipl Ing Olszewski
Dieter Dr Ing Toepker
Rainer Dipl Ing Hansen
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.)
Benteler Deustchland GmbH
Original Assignee
Benteler Deustchland GmbH
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 Benteler Deustchland GmbH filed Critical Benteler Deustchland GmbH
Priority to DE19802685A priority Critical patent/DE19802685A1/en
Priority to PT98118631T priority patent/PT931605E/en
Priority to DE59802523T priority patent/DE59802523D1/en
Priority to EP98118631A priority patent/EP0931605B1/en
Priority to ES98118631T priority patent/ES2166584T3/en
Priority to CZ19983222A priority patent/CZ295791B6/en
Priority to BR9804252-1A priority patent/BR9804252A/en
Publication of DE19802685A1 publication Critical patent/DE19802685A1/en
Withdrawn legal-status Critical Current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
    • B21D26/053—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 characterised by the material of the blanks
    • B21D26/057—Tailored blanks
    • 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
    • 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
    • B21C37/065—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 starting from a specific blank, e.g. tailored blank

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Body Structure For Vehicles (AREA)
  • Laminated Bodies (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines länglichen Hohlkörpers aus naturhartem Aluminium oder einer aushärtbaren Aluminiumlegierung und die Anwen­ dung eines solchen Hohlkörpers.The invention relates to a method for manufacturing an elongated hollow body made of naturally hard aluminum or a hardenable aluminum alloy and the applications such a hollow body.

Längliche Hohlkörper, wie beispielsweise Rohre, finden als Bauteile im Karosserie- und Fahrwerksbau Anwendung, z. B. für die Herstellung von Vorder- oder Hinterachsen und ähnlichem. Die wesentlichen Entwicklungsziele liegen hier auf dem Materialsektor in möglichst leichten und im Fertigungsbereich in immer kostengünstigeren Bauteilen, und zwar unter Einhaltung höchster Sicherheitskriterien.Find elongated hollow bodies, such as pipes as components in body and chassis construction applications, e.g. B. for the production of front or rear axles and the like. The main development goals lie here in the materials sector in the lightest and Manufacturing area in increasingly inexpensive components, in compliance with the highest security criteria.

Häufig sind solche Bauteile im Fahrzeug in verschiedenen Bereichen unterschiedlich starken Belastungen unterwor­ fen. Man ist daher zur Reduzierung der Fahrzeugmasse bei solchen Bauteilen bereits zum Einsatz von sogenannten "tailored blanks" übergegangen. Dies sind zusammenge­ schweißte Blechplatinen unterschiedlicher Festigkeits­ eigenschaften und/oder unterschiedlicher Blechdicke.Such components are often different in the vehicle Areas subject to different levels of stress fen. One is therefore involved in reducing the vehicle mass such components already for the use of so-called "tailored blanks" passed over. These are related  welded sheet metal of different strengths properties and / or different sheet thickness.

Zur Herstellung von Fahrzeugbauteilen nimmt man unter­ schiedlich starke Bleche und verschweißt diese in geradem Zustand zu Platinen. Erst nach dem Verschweißen findet die Umformung statt.One undertakes to manufacture vehicle components sheets of different thickness and welded in straight Condition to boards. Finds only after welding the forming takes place.

Diese Vorgehensweise gewährleistet bereits ein hohes Maß an Gewichtsreduktion. Dennoch ist man weiterhin bestrebt, Fahrzeugbauteile gewichtsmäßig zu reduzieren und kon­ struktiv zu verbessern.This procedure already ensures a high level in weight loss. Nevertheless, efforts continue to be made To reduce vehicle components in weight and con to improve structurally.

Es ist daher Aufgabe der Erfindung, ein Verfahren zur Herstellung von länglichen Hohlkörpern zu schaffen, wel­ che eine weitere Gewichtsreduzierung ermöglichen und eine gezielte, auf die jeweils unter Belastung auftretenden Spannungen abstimmbares Belastungsverhalten aufweisen.It is therefore an object of the invention to provide a method for Manufacture of elongated hollow bodies to create wel che enable further weight reduction and one targeted to those that occur under stress Stresses have adjustable load behavior.

Die Aufgabe wird erfindungsgemäß durch ein Verfahren ge­ mäß Anspruch 1 gelöst.The object is achieved by a method according to the invention solved according to claim 1.

Hierbei wird ein länglicher Hohlkörper aus naturhartem Aluminium beispielsweise AlMgMn oder einer aushärtbaren Aluminiumlegierung, wie z. B. AlMgSi1, hergestellt, in dem mindestens zwei Bleche unterschiedlicher Wanddicke zu einer Platine aneinandergefügt werden. Anschließend wird diese Platine zu einem Hohlkörper umgeformt und an den Längskanten fügetechnisch verbunden. Mittels des hydrau­ lischen Innenhochdruckumformens wird der Hohlkörper in die Endkonfiguration gebracht.Here, an elongated hollow body made of natural hard Aluminum, for example AlMgMn or a curable Aluminum alloy, such as B. AlMgSi1, produced in the at least two sheets of different wall thickness be joined together on a circuit board. Then will this board is formed into a hollow body and attached to the Longitudinal edges connected by joining technology. By means of the hydrau internal hydroforming, the hollow body is in brought the final configuration.

Auf diese Weise kann ein Hohlkörper hergestellt werden, der in Längs- und/oder Querrichtung Abschnitte unter­ schiedlicher Wanddicke aufweist. Wesentlich ist, daß zur Herstellung der Platine Bleche aus Aluminium bzw. Alumi­ niumlegierungen zum Einsatz gelangen. Hierdurch kann ein erhebliches Maß an Gewicht eingespart werden. Aluminium ist für den Fahrzeugbau ein idealer Werkstoff, weil er leicht, rostfrei und recyclebar ist.In this way, a hollow body can be produced the sections in the longitudinal and / or transverse direction has different wall thickness. It is essential that for Production of the sheet metal from aluminum or alumi  nium alloys are used. This can be a considerable amount of weight can be saved. aluminum is an ideal material for vehicle construction because it is light, rustproof and recyclable.

Ein solcher bereichsweise wanddickenreduzierter Hohlkör­ per kann für die Herstellung von Bauteilen verwendet wer­ den, die äußerer Belastung stehen, bei denen aber die auftretenden Spannungen aufgrund der Bauteilkonstruktion verteilt über das Bauteil in unterschiedlicher Höhe auf treten. Beispiele hierfür sind Karosserieteile oder Fahr­ werkskomponenten von Kraftfahrzeugen. Werden die Bauteile nach der Maximalbelastung dimensioniert, führt dies bis­ her nicht nur zu einem unnötigen Materialeinsatz, sondern vor allem auch zu einem unnötigen Gewicht. Derartige Nachteile werden erfindungsgemäß dadurch vermieden, daß die länglichen Hohlkörper die zur Herstellung der Bau­ teile Verwendung finden, entsprechend der späteren Bela­ stung in den einzelnen Bereichen der Bauteile unter­ schiedlich dimensioniert werden und zudem aus Leichtme­ tall gefertigt werden. Damit wird den späteren Belastun­ gen eines solchen Bauteils Rechnung getragen, zudem ein hohes Maß an Material- und Gewichtseinsparung erreicht.Such a hollow body with reduced wall thickness in some areas per can be used for the manufacture of components for those who are under external stress, but for whom occurring stresses due to the component design distributed over the component at different heights to step. Examples of this are body parts or driving factory components of motor vehicles. Will the components Dimensioned according to the maximum load, this leads to not only to unnecessary use of materials, but also especially at an unnecessary weight. Such Disadvantages are avoided according to the invention in that the elongated hollow body used to manufacture the building parts are used according to the later Bela support in the individual areas of the components be dimensioned differently and also from Leichtme tall be made. This will later against such a component high level of material and weight savings achieved.

Die mit dem erfindungsgemäßen Verfahren hergestellten Hohlkörper weisen ein besseres Biege- und Widerstands­ moment auf als bisher und können in ihrem Belastungsver­ halten optimal auf den jeweiligen Verwendungszweck ange­ paßt werden.The manufactured with the inventive method Hollow bodies have better bending and resistance moment on than before and can in their load ver adhere optimally to the respective purpose be fit.

Das Fügen der Längskanten erfolgt vorzugsweise mittels Laserschweißtechnik. Hierbei kommen leistungsstarke La­ serquellen zum Einsatz. Geeignet sind Kohlendioxidlaser. Besonders vorteilhaft ist ein Hochleistungslichtstrahl, der die Eigenschaften von Aluminium so verändert, daß das Licht nicht reflektiert, sondern absorbiert wird. Die auf diese Weise durch den Lichtstrahl im Fügekantenbe­ reich eingebrachte Energie bringt das Metall zum schmel­ zen. Die anschließend erstarrte Schmelze stellt dann eine feste Verbindung her.The longitudinal edges are preferably joined by means of Laser welding technology. Here powerful La water sources. Carbon dioxide lasers are suitable. A high-performance light beam is particularly advantageous, which changes the properties of aluminum so that the light is not reflected, but is absorbed. The  in this way through the light beam in the joint edge richly introduced energy melts the metal Zen. The subsequently solidified melt then provides a firm connection.

Der Fügevorgang ist automatisierbar und damit ideal für die Massenproduktion.The joining process can be automated and is therefore ideal for mass production.

Durch die Endformgebung mittels hydraulischem Innenhoch­ druckumformen kann die Anzahl von Fügenähten gering ge­ halten werden. Vor der Endformgebung kann bedarfsweise ein Glühen der Hohlkörper vorgenommen werden, um mögliche Eigenspannungen im Werkstück abzubauen. Ferner kann eine Verformung des Hohlkörpers, beispielsweise durch Biegen, vorgenommen werden.Due to the final shape by means of a hydraulic inner height The number of seams can be reduced by pressure will hold. Before the final shaping, if necessary a glow of the hollow body can be made to possible Reduce residual stresses in the workpiece. Furthermore, a Deformation of the hollow body, for example by bending, be made.

Es hat sich gezeigt, daß die Endformgebung mittels hydraulischer Innenhochdruckumformtechnik eine besonders produktive und wirtschaftliche, aber auch insbesondere schonende Umformung der fügetechnisch verbundenen Plati­ nen erlaubt. Unerwünschte Materialverschiebungen oder Verdünnungen bei der Endformgebung werden vermieden. Die hydraulische Innenhochdruckumformung erlaubt es trotz Blechdickensprüngen und Blechdickentoleranzen eine vor­ gebbare Flächenpressung beim Umformen einzuhalten. Ein Wandern der Fügenaht, insbesondere einer Schweißnaht, während des Umformvorgangs wird in tolerierbaren Grenzen gehalten. Einer unregelmäßigen Flächenpressung und damit einer Faltenbildung oder Wellenausbildung wird durch die erfindungsgemäß angewandte hydraulische Innenhochdruck­ umformung entgegengewirkt.It has been shown that the final shaping by means of hydraulic hydroforming technology a special productive and economical, but also in particular Gentle forming of the plati connected by joining technology allowed. Unwanted material shifts or Thinning in the final shaping is avoided. The hydraulic high pressure forming allows it despite Sheet metal jumps and sheet thickness tolerances are one observable surface pressure when forming. A Hiking the joining seam, in particular a weld seam, during the forming process is within tolerable limits held. An irregular surface pressure and thus a wrinkling or wave formation is caused by the Hydraulic internal high pressure used according to the invention Forming counteracted.

Größe und Form der Bleche aus Aluminium-Leichtmetall kann variieren. Diese Parameter werden entsprechend der Bauteilgestaltung und auftretenden Lastspannungen ausge­ wählt. Für die Herstellung von länglichen Hohlkörpern in Leichtbauweise sind Bleche aus naturhartem Aluminium (AlMgMn) und aushärtbare Legierungen (AlMgSi1) besonders gut geeignet. Damit wird ein Hohlkörper geschaffen mit Eigenschaften hinsichtlich des Festigkeits-, Tragfähig­ keits- und Lastspannungsverhaltens, der optimal auf die spätere Verwendung abgestimmt ist.Size and shape of the aluminum light metal sheets may vary. These parameters are according to the Component design and occurring load voltages elects. For the production of elongated hollow bodies in  Sheets made of naturally hard aluminum are lightweight (AlMgMn) and hardenable alloys (AlMgSi1) in particular well suited. This creates a hollow body with Properties with regard to strength, load-bearing capacity behavior and load voltage behavior that is optimal for the later use is coordinated.

Die mit dem erfindungsgemäßen Verfahren hergestellten länglichen Hohlkörper sind besonders gut geeignet für die Fertigung von Karosserieteilen oder Fahrwerkskomponenten. Der Hohlkörper weist eine auf seine spätere Verwendung abgestimmte Konfiguration auf bei einem hohen Maß an Ge­ wichtseinsparung. Es werden zwei an sich gegenläufige Tedenzen vereinigt, indem ein hochbelastungsfähiger Fahr­ werksträger in Leichtbauweise realisiert wird.The manufactured with the inventive method elongated hollow bodies are particularly suitable for the Manufacture of body parts or chassis components. The hollow body indicates one of its later use coordinated configuration with a high degree of Ge weight saving. There will be two opposing ones Tedenzen united by making a heavy-duty ride workpiece carrier is realized in lightweight construction.

Claims (2)

1. Verfahren zur Herstellung eines länglichen Hohlkör­ pers aus naturhartem Aluminium, wie z. B. AlMgMn oder einer aushärtbaren Aluminiumlegierung, wie z. B. AlMgSi1, bei welchem mindestens zwei Bleche unter­ schiedlicher Wanddicke zu einer Platine aneinanderge­ fügt, dann diese Platine zu einem Hohlkörper umge­ formt und anschließend dessen Längskanten fügetech­ nisch verbunden werden, worauf dieser Hohlkörper durch hydraulisches Innenhochdruckumformen in die Endkonfiguration gebracht wird.1. Process for producing an elongated hollow body pers made of naturally hard aluminum, such as B. AlMgMn or a hardenable aluminum alloy, such as. B. AlMgSi1, in which at least two sheets under different wall thicknesses to form a board then inserts this board into a hollow body forms and then its longitudinal edges are joined nisch connected, whereupon this hollow body by hydraulic high pressure forming in the Final configuration is brought. 2. Anwendung eines mit den Merkmalen des Anspruchs 1 ge­ fertigten Hohlkörpers als Bestandteil von Fahrwerks­ trägern im Fahrzeugbau.2. Application of a ge with the features of claim 1 manufactured hollow body as part of chassis carriers in vehicle construction.
DE19802685A 1998-01-24 1998-01-24 Process for producing an elongated hollow body and its use Withdrawn DE19802685A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE19802685A DE19802685A1 (en) 1998-01-24 1998-01-24 Process for producing an elongated hollow body and its use
PT98118631T PT931605E (en) 1998-01-24 1998-10-01 PROCESS FOR THE MANUFACTURE OF A STRONG BODY
DE59802523T DE59802523D1 (en) 1998-01-24 1998-10-01 Process for producing an elongated hollow body
EP98118631A EP0931605B1 (en) 1998-01-24 1998-10-01 Method for producing an elongated hollow body
ES98118631T ES2166584T3 (en) 1998-01-24 1998-10-01 PROCEDURE FOR THE MANUFACTURE OF A LONG HOLLOW BODY.
CZ19983222A CZ295791B6 (en) 1998-01-24 1998-10-06 Process for producing elongated hollow body
BR9804252-1A BR9804252A (en) 1998-01-24 1998-10-27 Process for the manufacture of an oblong hollow body and its application.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19802685A DE19802685A1 (en) 1998-01-24 1998-01-24 Process for producing an elongated hollow body and its use

Publications (1)

Publication Number Publication Date
DE19802685A1 true DE19802685A1 (en) 1999-07-29

Family

ID=7855576

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19802685A Withdrawn DE19802685A1 (en) 1998-01-24 1998-01-24 Process for producing an elongated hollow body and its use
DE59802523T Expired - Fee Related DE59802523D1 (en) 1998-01-24 1998-10-01 Process for producing an elongated hollow body

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE59802523T Expired - Fee Related DE59802523D1 (en) 1998-01-24 1998-10-01 Process for producing an elongated hollow body

Country Status (6)

Country Link
EP (1) EP0931605B1 (en)
BR (1) BR9804252A (en)
CZ (1) CZ295791B6 (en)
DE (2) DE19802685A1 (en)
ES (1) ES2166584T3 (en)
PT (1) PT931605E (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1014823C2 (en) * 2000-04-03 2001-10-04 Corus Staal Bv Method of manufacturing a tubular part.
DE10024225A1 (en) * 2000-05-17 2001-11-22 Volkswagen Ag Steering rod re-shaped from sheet metal sections welded together has tilted or transverse shaft and bearing sections.
DE10018238C1 (en) * 2000-04-12 2001-12-20 Vaw Alutubes Gmbh Roll-off pistons for air spring systems
WO2002020208A1 (en) * 2000-09-06 2002-03-14 Toyota Jidosha Kabushiki Kaisha Hollow member, manufacturing method therof, fluid distribution system using the hollow member, and forming apparatus of hollow member
DE10153799A1 (en) * 2001-11-05 2003-05-15 Zf Lemfoerder Metallwaren Ag Force connection strut
DE10252135A1 (en) * 2002-11-09 2004-05-27 Zf Friedrichshafen Ag Individual suspension for wheel of vehicle, comprising main arms and carrying bars designed with elliptical cross section
DE102005027409A1 (en) * 2005-06-02 2006-12-07 Koki Technik Metallverarbeitung Gmbh & Co. Kg Locking sleeve for limiting operating path of control shaft of gear, has pan with two half shells having different wall thicknesses and made of different materials, where shells lock switching rail and serve for power transmission of finger

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE330800T1 (en) * 2002-05-22 2006-07-15 Norsk Hydro As ONE-PIECE SPRING ARM
US6825442B2 (en) * 2003-01-06 2004-11-30 General Motors Corporation Tailor welded blank for fluid forming operation
DE10360327A1 (en) * 2003-12-20 2005-07-21 Robert Bosch Gmbh Method for producing a solid housing

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DE2714905A1 (en) * 1977-04-02 1978-10-12 Metallgesellschaft Ag Sandwich plate forming system for heat exchangers - uses two stage inflation of plate between two stop plates
DE4232161A1 (en) * 1992-09-25 1994-03-31 Audi Ag Process for producing a hollow body
DE4216640C2 (en) * 1992-05-20 1994-08-25 Daimler Benz Ag Handlebar folded in one piece
DE4142325C2 (en) * 1991-12-20 1996-06-13 Bayerische Motoren Werke Ag Method of manufacturing chassis beams
DE19535870A1 (en) * 1995-07-24 1997-02-06 Blz Gmbh Method of forming shell=like hollow structures from two sheet sections - by clamping the ends of the sheet and flowing a pressure medium between the two

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US5333775A (en) * 1993-04-16 1994-08-02 General Motors Corporation Hydroforming of compound tubes
DE4320656B4 (en) * 1993-06-22 2005-07-07 Schuler Hydroforming Gmbh & Co. Kg Application of the known hydroforming process
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ES2176770T3 (en) * 1996-12-03 2002-12-01 Elpatronic Ag PROCEDURE FOR THE MANUFACTURE OF A MOLDED PART.
DE19713963C1 (en) * 1997-04-04 1998-10-22 Prototechnik Gmbh Fluid guide element

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Publication number Priority date Publication date Assignee Title
DE2714905A1 (en) * 1977-04-02 1978-10-12 Metallgesellschaft Ag Sandwich plate forming system for heat exchangers - uses two stage inflation of plate between two stop plates
DE4142325C2 (en) * 1991-12-20 1996-06-13 Bayerische Motoren Werke Ag Method of manufacturing chassis beams
DE4216640C2 (en) * 1992-05-20 1994-08-25 Daimler Benz Ag Handlebar folded in one piece
DE4232161A1 (en) * 1992-09-25 1994-03-31 Audi Ag Process for producing a hollow body
DE19535870A1 (en) * 1995-07-24 1997-02-06 Blz Gmbh Method of forming shell=like hollow structures from two sheet sections - by clamping the ends of the sheet and flowing a pressure medium between the two

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GEIGER,Manfred, HEIN,Philipp: Neue Ideen zum Innenhochdruckumformen. In. Blech, Rohre, Profile 43, 1996, 1/2, S.63,64 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1014823C2 (en) * 2000-04-03 2001-10-04 Corus Staal Bv Method of manufacturing a tubular part.
WO2001074507A1 (en) * 2000-04-03 2001-10-11 Corus Staal Bv Process for producing a tubular component
US6842957B2 (en) 2000-04-03 2005-01-18 Corus Staal Bv Process for producing a tubular component
DE10018238C1 (en) * 2000-04-12 2001-12-20 Vaw Alutubes Gmbh Roll-off pistons for air spring systems
DE10024225A1 (en) * 2000-05-17 2001-11-22 Volkswagen Ag Steering rod re-shaped from sheet metal sections welded together has tilted or transverse shaft and bearing sections.
WO2002020208A1 (en) * 2000-09-06 2002-03-14 Toyota Jidosha Kabushiki Kaisha Hollow member, manufacturing method therof, fluid distribution system using the hollow member, and forming apparatus of hollow member
DE10153799A1 (en) * 2001-11-05 2003-05-15 Zf Lemfoerder Metallwaren Ag Force connection strut
US7159880B2 (en) 2001-11-05 2007-01-09 ZF Lemförder Metallwaren AG Force connection strut
DE10252135A1 (en) * 2002-11-09 2004-05-27 Zf Friedrichshafen Ag Individual suspension for wheel of vehicle, comprising main arms and carrying bars designed with elliptical cross section
DE102005027409A1 (en) * 2005-06-02 2006-12-07 Koki Technik Metallverarbeitung Gmbh & Co. Kg Locking sleeve for limiting operating path of control shaft of gear, has pan with two half shells having different wall thicknesses and made of different materials, where shells lock switching rail and serve for power transmission of finger
DE102005027409B4 (en) * 2005-06-02 2010-12-02 Koki Technik Transmission Systems Gmbh Rastierungshülse

Also Published As

Publication number Publication date
EP0931605A2 (en) 1999-07-28
BR9804252A (en) 1999-12-07
CZ295791B6 (en) 2005-11-16
DE59802523D1 (en) 2002-01-31
CZ322298A3 (en) 1999-10-13
ES2166584T3 (en) 2002-04-16
EP0931605A3 (en) 2000-05-03
EP0931605B1 (en) 2001-12-19
PT931605E (en) 2002-06-28

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