EP0931605B1 - Method for producing an elongated hollow body - Google Patents

Method for producing an elongated hollow body Download PDF

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Publication number
EP0931605B1
EP0931605B1 EP98118631A EP98118631A EP0931605B1 EP 0931605 B1 EP0931605 B1 EP 0931605B1 EP 98118631 A EP98118631 A EP 98118631A EP 98118631 A EP98118631 A EP 98118631A EP 0931605 B1 EP0931605 B1 EP 0931605B1
Authority
EP
European Patent Office
Prior art keywords
hollow body
hollow member
producing
elongated hollow
components
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
EP98118631A
Other languages
German (de)
French (fr)
Other versions
EP0931605A2 (en
EP0931605A3 (en
Inventor
Egon Olszewski
Dieter TÖPKER
Rainer 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
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Publication date
Application filed by Benteler Deustchland GmbH filed Critical Benteler Deustchland GmbH
Publication of EP0931605A2 publication Critical patent/EP0931605A2/en
Publication of EP0931605A3 publication Critical patent/EP0931605A3/en
Application granted granted Critical
Publication of EP0931605B1 publication Critical patent/EP0931605B1/en
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
    • B21D26/053—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, wie im Oberbegrift des Anspruchs 1 erwähnt und entsprechend in DE 4 142 325 offenbart.The invention relates to a method for manufacturing an elongated hollow body made of naturally hard aluminum or a hardenable aluminum alloy, as in the general heading of Claim 1 mentioned and correspondingly disclosed in DE 4 142 325.

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 Endwicklungsziele 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. for the production of front or rear axles and the like. The main development goals are 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 unterworfen. Man ist daher zur Reduzierung der Fahrzeugmasse bei solchen Bauteilen bereits zum Einsatz von sogenannten "tailored blanks" übergegangen. Dies sind zusammengeschweißte Blechplatinen unterschiedlicher Festigkeitseigenschaften und/oder unterschiedlicher Blechdicke.Such components are often different in the vehicle Areas subjected to different levels of stress. One is therefore involved in reducing the vehicle mass such components already for the use of so-called "tailored blanks" passed over. These are welded together Sheet metal boards with different strength properties and / or different sheet thickness.

Zur Herstellung von Fahrzeugbauteilen nimmt man unterschiedlich starke Bleche und verschweißt diese in geradem Zustand zu Platinen. Erst nach dem Verschweissen findet die Umformung statt.There are different ways to manufacture vehicle components strong sheets and welds them in a straight line 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 konstruktiv zu verbessern.This procedure already ensures a high level in weight loss. Nevertheless, efforts continue to be made Reduce vehicle components in weight and constructively to improve.

Es ist daher Aufgabe der Erfindung, ein Verfahren zur Herstellung von länglichen Hohlkörpern zu schaffen, welche 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 which 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 gemäß Anspruch 1 gelöst.The object is achieved according to the invention by a method Claim 1 solved.

Hierbei wird ein länglicher Hohlkörper aus naturhartem Aluminium beispielsweise AlMgMn oder einer aushärtbaren Aluminiumlegierung, wie z.B. AlMgSil, 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 hydraulischen 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, e.g. AlMgSil, manufactured 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 hydraulic Hydroforming is the hollow body in brought the final configuration.

Auf diese Weise kann ein Hohlkörper hergestellt werden, der in Längs- und/oder Querrichtung Abschnitte unterschiedlicher Wanddicke aufweist. Wesentlich ist, dass zur Herstellung der Platine Bleche aus Aluminium bzw. Aluminiumlegierungen 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 different Has wall thickness. It is essential that for Manufacture of sheet metal from aluminum or aluminum 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 Hohlkörper kann für die Herstellung von Bauteilen verwendet werden, die unter äußerer Belastung stehen, bei denen aber die auftretenden Spannungen aufgrund der Bauteilkonstruktion verteilt über das Bauteil in unterschiedlicher Höhe auftreten. Beispiele hierfür sind Karosserieteile oder Fahrwerkskomponenten von Kraftfahrzeugen. Werden die Bauteile nach der Maximalbelastung dimensioniert, führt dies bisher 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 Bauteile Verwendung finden, entsprechend der späteren Belastung in den einzelnen Bereichen der Bauteile unterschiedlich dimensioniert werden und zudem aus Leichtmetall gefertigt werden. Damit wird den späteren Belastungen 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 can be used for the production of components who are under external stress, but where the tensions that occur due to the Component construction spread over the component in different heights occur. examples for this are Body parts or chassis components from Motor vehicles. Are the components after the Dimensioned maximum load, this does not result so far only for an unnecessary use of materials, but above all also at an unnecessary weight. Such disadvantages are avoided according to the invention in that the elongated hollow body used to manufacture the components Find use according to the later load in different areas of the components be dimensioned and also made of light metal become. This will reduce the later burdens of such Component taken into account, also a high level of Material and weight savings achieved.

Die mit dem erfindungsgemäßen Verfahren hergestellten Hohlkörper weisen ein besseres Biege- und Widerstandsmoment auf als bisher und können in ihrem Belastungsverhalten optimal auf den jeweiligen Verwendungszweck angepasst werden.The manufactured with the inventive method Hollow bodies have a better bending and section modulus on than before and can in their stress behavior optimally adapted to the respective purpose become.

Das Fügen der Längskanten erfolgt vorzugsweise mittels Laserschweißtechnik. Hierbei kommen leistungsstarke Laserquellen 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 Fügekantenbereich eingebrachte Energie bringt das Metall zum schmelzen. Die anschliessend erstarrte Schmelze stellt dann eine feste Verbindung her.The longitudinal edges are preferably joined by means of Laser welding technology. Here come powerful laser sources for use. Carbon dioxide lasers are suitable. A high-performance light beam is particularly advantageous, that 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 area The energy brought in melts the metal. The subsequently solidified melt then sets 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 Innenhochdruckumformen kann die Anzahl von Fügenähten gering gehalten 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.Through the final shaping by means of hydraulic hydroforming can keep the number of seams low become. 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 Platinen erlaubt. Unerwünschte Materialverschiebungen oder Verdünnungen bei der Endformgebung werden vermieden. Die hydraulische Innenhochdruckumformung erlaubt es trotz Blechdickensprüngen und Blechdickentoleranzen eine vorgebbare 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 Innenhochdruckumformung 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 shaping of the boards 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 metal thickness tolerances are a definable one Comply with surface pressure when forming. On 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 hydroforming used according to the invention counteracted.

Größe und Form der Bleche aus Aluminium-Leichtmetall kann variieren. Diese Parameter werden entsprechend der Bauteilgestaltung und auftretenden Lastspannungen ausgewählt. 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-, Tragfähigkeits- und Lastspannungsverhaltens, der optimal auf die spätere Verwendung abgestimmt ist.Size and shape of aluminum light metal sheets can vary. These parameters are according to the Component design and occurring load voltages selected. 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 capacity and load voltage behavior that is optimal on 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 Gewichtseinsparung. Es werden zwei an sich gegenläufige Tendenzen vereinigt, indem ein hochbelastungsfähiger Fahrwerksträger 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 weight saving. There will be two opposing ones Trends united by being a heavy duty Chassis carrier is realized in lightweight construction.

Claims (2)

  1. A method of producing an elongate hollow member from naturally hard aluminium, for example AlMgMn or a hardenable aluminium alloy, for example AlMgSil, characterised in that at least two metal sheets of different wall thickness are joined together to form a plate, this plate is then shaped into a hollow member, and then its longitudinal edges are connected by jointing technology, whereupon the hollow member is brought into the final configuration by shaping under hydraulic internal high pressure.
  2. A method according to claim 1, characterised in that the hollow member is a component of chassis members in motor vehicle construction.
EP98118631A 1998-01-24 1998-10-01 Method for producing an elongated hollow body Expired - Lifetime EP0931605B1 (en)

Applications Claiming Priority (2)

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
DE19802685 1998-01-24

Publications (3)

Publication Number Publication Date
EP0931605A2 EP0931605A2 (en) 1999-07-28
EP0931605A3 EP0931605A3 (en) 2000-05-03
EP0931605B1 true EP0931605B1 (en) 2001-12-19

Family

ID=7855576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98118631A Expired - Lifetime EP0931605B1 (en) 1998-01-24 1998-10-01 Method 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)

Families Citing this family (10)

* 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.
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.
JP2002153930A (en) * 2000-09-06 2002-05-28 Toyota Motor Corp Hollow member, its manufacturing method, fluid circulation system using the hollow member, and forming apparatus for hollow material
DE10153799A1 (en) * 2001-11-05 2003-05-15 Zf Lemfoerder Metallwaren Ag Force connection strut
DE50303905D1 (en) * 2002-05-22 2006-08-03 Norsk Hydro As One-piece spring link
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
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
DE102005027409B4 (en) * 2005-06-02 2010-12-02 Koki Technik Transmission Systems Gmbh Rastierungshülse

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2714905C3 (en) * 1977-04-02 1979-10-04 Metallgesellschaft Ag, 6000 Frankfurt Two-stage expansion of channel 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
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
DE19535870C2 (en) * 1995-07-24 2002-07-11 Blz Gmbh Process for producing shell-shaped hollow structures from double sheet metal blanks by means of internal high pressure forming
DE19624955A1 (en) * 1996-06-24 1998-01-08 Matthias Prof Dr Ing Kleiner Mobile pipe line manufacturing process
PT942794E (en) * 1996-12-03 2002-10-31 Elpatronic Ag PROCESS FOR THE MANUFACTURE OF A FRAMED PECA
DE19713963C1 (en) * 1997-04-04 1998-10-22 Prototechnik Gmbh Fluid guide element

Also Published As

Publication number Publication date
CZ322298A3 (en) 1999-10-13
BR9804252A (en) 1999-12-07
DE59802523D1 (en) 2002-01-31
DE19802685A1 (en) 1999-07-29
PT931605E (en) 2002-06-28
ES2166584T3 (en) 2002-04-16
EP0931605A2 (en) 1999-07-28
CZ295791B6 (en) 2005-11-16
EP0931605A3 (en) 2000-05-03

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