DE102011012940A1 - Method for joining motor vehicle chassis components involves performing brazing or cold metal transfer welding soldering to steel component and light alloy made component so that steel component is joined to light alloy made component - Google Patents
Method for joining motor vehicle chassis components involves performing brazing or cold metal transfer welding soldering to steel component and light alloy made component so that steel component is joined to light alloy made component Download PDFInfo
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- DE102011012940A1 DE102011012940A1 DE102011012940A DE102011012940A DE102011012940A1 DE 102011012940 A1 DE102011012940 A1 DE 102011012940A1 DE 102011012940 A DE102011012940 A DE 102011012940A DE 102011012940 A DE102011012940 A DE 102011012940A DE 102011012940 A1 DE102011012940 A1 DE 102011012940A1
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- component
- light alloy
- alloy made
- steel
- joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
- B23K9/232—Arc welding or cutting taking account of the properties of the materials to be welded of different metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
- B23K2103/20—Ferrous alloys and aluminium or alloys thereof
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Fügen zweier Bauteile nach dem Oberbegriff von Patentanspruch 1.The invention relates to a method for joining two components according to the preamble of patent claim 1.
Im Zuge moderner Leichtbaubestrebungen werden im Kraftwagenbau zunehmend Karosseriebauteile aus Leichtmetalllegierungen, insbesondere aus Aluminiumlegierungen verwendet. Gleichzeitig finden in besonders stabilitätsrelevanten Regionen der Kraftwagenkarosserie noch immer Stahlbauteile Anwendung. Im Karosseriebau ergibt sich somit das Problem, dass Bauteile aus unterschiedlichen Metallen, die deutlich unterschiedliche Schmelzpunkte und andere physikalisch-chemische Eigenschaften aufweisen, gefügt werden müssen. Dies findet üblicherweise durch die Verwendung von Überlappflanschen statt, an welchen die Karosseriebauteile durch Klebverbindungen oder mechanische Fügeverfahren wie Nieten oder Clinchen gefügt werden.In the course of modern lightweight construction efforts, body parts made of light metal alloys, in particular of aluminum alloys, are increasingly used in motor vehicle construction. At the same time, steel components are still used in particularly stability-relevant regions of the motor vehicle body. In body construction, this results in the problem that components made of different metals, which have significantly different melting points and other physico-chemical properties, must be joined. This usually takes place through the use of overlap flanges to which the body components are joined by gluing or mechanical joining methods such as riveting or clinching.
Auch die Verwendung so genannter Tailored-Blanks, also von Blechbauteilen, die bereichsweise aus unterschiedlichen Materialien bestehen, ist bekannt. Hierdurch können Karosseriebauteile realisiert werden, die beispielsweise in gewichtsrelevanten Bereichen aus Aluminiumlegierungen und in steifigkeitsrelevanten Bereichen aus Stahl bestehen. Durch die geeignete Gestaltung solcher Tailored-Blanks kann sichergestellt werden, dass die Verbindung zwischen einzelnen Karosseriebauteilen ohne Hybridnähte auskommt.Also, the use of so-called tailored blanks, ie of sheet metal components, which are partially made of different materials, is known. As a result, body components can be realized, which consist, for example, in weight-related areas of aluminum alloys and in stiffness-relevant areas of steel. The appropriate design of such tailored blanks can ensure that the connection between individual body components does not require any hybrid seams.
Die Verwendung von Überlappflanschen in Kombination mit durchsetzenden Fügeverbindungen oder Verklebungen führt nachteiliger Weise zu einem erhöhten Bauraumbedarf und zu einem erhöhten Gewicht der Karosserie. Auch die Verwendung von Tailored-Blanks ist nicht immer ideal, da je nach Gestaltungsanforderungen stellenweise auch homogene Bauteile verbaut werden müssen, die den gewünschten Verzicht auf Hybridfügenähte nicht immer ermöglichen. Auch hier sind daher bauraum- und gewichtsaufwendige Flanschverbindungen notwendig.The use of overlap flanges in combination with intersecting joints or bonds leads disadvantageously to increased space requirements and increased weight of the body. The use of tailored blanks is not always ideal, because depending on the design requirements in places homogeneous components must be installed, which does not always allow the desired renouncement of hybrid seams. Here, too, space-consuming and weight-consuming flange connections are necessary.
Der vorliegenden Erfindung liegt somit die Aufgabe zu Grunde, ein Verfahren nach dem Oberbegriff von Patentanspruch 1 bereitzustellen, welches ein besonders bauraum- und gewichtssparendes Fügen von Karosseriebauteilen ermöglicht.The present invention is therefore based on the object to provide a method according to the preamble of claim 1, which allows a particularly space-saving and weight-saving joining of body parts.
Diese Aufgabe wird durch ein Verfahren mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved by a method having the features of patent claim 1.
Bei einem solchen Verfahren zum Fügen zweier Bauteile wird ein erstes Bauteil aus einem Stahl mit einem zweiten Bauteil aus einer Aluminiumlegierung gefügt, wobei die beiden Bauteil auf Stoß durch Schweißlöten gefügt werden. Durch das Schweißlöten können haltbare Fügeverbindungen zwischen Bauteilen aus unterschiedlichen Materialien geschaffen werden. Da die Fügeverbindung auf Stumpfstoß erfolgt, kann auf Flanschbereich verzichtet werdet, so dass der Fügebereich der beiden Bauteile besonders wenig Bauraum benötigt. Durch den Verzicht auf einen Flansch wird zudem Gewicht eingespart.In such a method for joining two components, a first component made of a steel with a second component made of an aluminum alloy is added, wherein the two components are joined in shock welding soldering. By welding braids durable connections between components made of different materials can be created. Since the joint connection is made on butt joint, can be dispensed flange area, so that the joining area of the two components requires very little space. By eliminating a flange weight is also saved.
Erfindungsgemäß ist dabei vorgesehen, dass das erste Bauteil als Blechbauteil, insbesondere als Trägerteil für eine Kraftwagenkarosserie in Blechschalenbauweise, und das zweite als Gussbauteil bereitgestellt ist. Dies ermöglicht die Kombination von im Leichtmetalldruckguss gefertigten Strukturbauteilen oder Knotenelementen mit üblichen Stahlträgern in Blechbauweise. Hierdurch kann eine Karosserie geschaffen werden, die sowohl bezüglich ihres Gewichts als auch bezüglich ihrer Steifigkeit optimiert ist. Die mittels eines erfindungsgemäßen Verfahrens gefertigte Karosserie ist somit besonders leicht, stabil und gleichzeitig bauraum- und gewichtssparend.According to the invention, it is provided that the first component is provided as a sheet metal component, in particular as a carrier part for a motor vehicle body in sheet metal shell construction, and the second as a cast component. This makes it possible to combine structural components or nodal elements produced in light metal diecasting with conventional sheet-metal steel supports. In this way, a body can be created, which is optimized both in terms of their weight and in terms of their rigidity. The body produced by a method according to the invention is thus particularly lightweight, stable and at the same time space and weight saving.
In einer besonders bevorzugten Ausführungsform der Erfindung werden die beiden Bauteile durch ein Kaltmetalltransfer-Schweißverfahren (CMT) gefügt. Hierbei wird das Aluminiumbauteil im Fügebereich zunächst auf eine Temperatur oberhalb seines Schmelzpunktes erwärmt. Anschließend werden die zu verbindenden Bauteile in Kontakt miteinander gebracht und anschließend erwärmte Bereiche wieder abgekühlt. Analog zu einem Lötverfahren wird auf diese Weise eine stoffschlüssige Verbindung zwischen den beiden Werkstücken erzeugt. Hierdurch können besonders feste und haltbare Nähte zwischen den beiden Karosseriebauteilen geschaffen werden.In a particularly preferred embodiment of the invention, the two components are joined by a cold metal transfer welding process (CMT). In this case, the aluminum component is first heated in the joining region to a temperature above its melting point. Subsequently, the components to be connected are brought into contact with each other and then heated areas are cooled again. Analogous to a soldering process, a cohesive connection between the two workpieces is produced in this way. As a result, particularly strong and durable seams between the two body parts can be created.
Vorzugsweise ist das zweite Bauteil als Federbeindom bereitgestellt. Hierdurch kann eine konventionelle Vorderwagenstruktur, deren Längsträger in der ersten und zweiten Längsträgerebene aus Stahl in Blechschalenbauweise gefertigt ist, mit Leichtmetall-Federbeindomen bereitgestellt werden, ohne dass eine aufwendige Verbindungs- und Fügetechnik notwendig wird.Preferably, the second component is provided as a spring leg. In this way, a conventional front end structure whose longitudinal member is made in the first and second longitudinal beam level of steel in sheet metal shell construction, be provided with light metal Federbeindomen, without a complex connection and joining technology is necessary.
Eine besonders gute und korrosionsbeständige Verbindung ergibt sich, wenn das erste Bauteil vor dem Fügen zumindest im Verbindungsbereich noch verzinkt wird.A particularly good and corrosion-resistant connection results when the first component is still galvanized before joining at least in the connection area.
Im Folgenden werden die Erfindung und ihre Ausführungsformen anhand der Zeichnung näher erläutert. Die einzige Figur zeigt hierbei eine perspektivische Ansicht einer nach einem Ausführungsbeispiel eines erfindungsgemäßen Verfahrens gefertigten Vorderwagenstruktur einer Kraftwagenkarosserie.In the following the invention and its embodiments will be explained in more detail with reference to the drawing. The sole FIGURE here shows a perspective view of a front end structure of a motor vehicle bodywork produced according to an embodiment of a method according to the invention.
Eine im Ganzen mit
Um ein besonders einfaches Fügen der Längsträger
Eine besonders hohe Verbindungsqualität kann hierbei erzielt werden, wenn in den Verbindungsbereichen
Durch den besonders geringen Wärmeeintrag beim Kaltmetalltransferschweißen werden zudem bei der Herstellung der Verbindung zwischen den Dämpferdomen
Neben der Verwendung von Aluminiumlegierungen ist das Verfahren darüber hinaus zum Verbinden von Stahlbauteilen mit Bauteilen aus Magnesiumlegierungen oder andere Leichtmetallen geeignet.In addition to the use of aluminum alloys, the method is also suitable for joining steel components with components made of magnesium alloys or other light metals.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102011012940A DE102011012940A1 (en) | 2011-03-03 | 2011-03-03 | Method for joining motor vehicle chassis components involves performing brazing or cold metal transfer welding soldering to steel component and light alloy made component so that steel component is joined to light alloy made component |
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DE102011012940A DE102011012940A1 (en) | 2011-03-03 | 2011-03-03 | Method for joining motor vehicle chassis components involves performing brazing or cold metal transfer welding soldering to steel component and light alloy made component so that steel component is joined to light alloy made component |
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DE102011012940A1 true DE102011012940A1 (en) | 2012-09-06 |
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DE102011012940A Withdrawn DE102011012940A1 (en) | 2011-03-03 | 2011-03-03 | Method for joining motor vehicle chassis components involves performing brazing or cold metal transfer welding soldering to steel component and light alloy made component so that steel component is joined to light alloy made component |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012021634A1 (en) * | 2012-11-02 | 2014-05-08 | Audi Ag | Production of material used for suspension strut, involves casting recycled magnesium alloy including aluminum and manganese, and heat-treating obtained motor-vehicle component-making material to increase ductility of magnesium alloy |
US9517796B2 (en) | 2015-03-09 | 2016-12-13 | Ford Global Technologies, Llc | Thin-walled magnesium diecast shock tower for use in a vehicle |
-
2011
- 2011-03-03 DE DE102011012940A patent/DE102011012940A1/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012021634A1 (en) * | 2012-11-02 | 2014-05-08 | Audi Ag | Production of material used for suspension strut, involves casting recycled magnesium alloy including aluminum and manganese, and heat-treating obtained motor-vehicle component-making material to increase ductility of magnesium alloy |
DE102012021634B4 (en) * | 2012-11-02 | 2017-01-19 | Audi Ag | A method of making a vehicle body having a magnesium alloy body member, and a vehicle body made therewith |
US9517796B2 (en) | 2015-03-09 | 2016-12-13 | Ford Global Technologies, Llc | Thin-walled magnesium diecast shock tower for use in a vehicle |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |