EP0927590A2 - Eine aufgeschaumte Metallschicht enthaltender Karosseriebauteil für Kraftfahrzeuge - Google Patents
Eine aufgeschaumte Metallschicht enthaltender Karosseriebauteil für Kraftfahrzeuge Download PDFInfo
- Publication number
- EP0927590A2 EP0927590A2 EP98122772A EP98122772A EP0927590A2 EP 0927590 A2 EP0927590 A2 EP 0927590A2 EP 98122772 A EP98122772 A EP 98122772A EP 98122772 A EP98122772 A EP 98122772A EP 0927590 A2 EP0927590 A2 EP 0927590A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- perforations
- layer
- component
- cover layer
- foaming
- 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- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
- B22F3/1125—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers involving a foaming process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/002—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/002—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature
- B22F7/004—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part
- B22F7/006—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part the porous part being obtained by foaming
Definitions
- the invention relates to a component with a metallic Layer comprising foam material and a solid metallic cover layer according to the preamble of claim 1.
- DE 196 12 781 C1 describes a generic component in which the Adhesive layers by roll cladding, the semi-finished product thus formed through a molding process, such as deep drawing, into one final contour on one side is formed before this semi-finished product through one or both sides limited foaming in a foaming mold is finally formed into the finished component.
- This turns the Difficulty, especially if the training is not sufficiently homogeneous the mixture of metal powder and blowing agent in the foaming Layer that the blowing agent leads to gas bubble accumulation.
- Such Gas bubbles in the foaming layer are suitable for the stability of the To endanger the entire component and even cracks during foaming to form in a solid metallic cover layer.
- the invention is based on the problem, the quality of the generic type Improve components and the reject rate during series production to reduce.
- the perforations are at least in one upper cover layer, but can also have a lower cover layer reach through an intermediate foam layer.
- the perforation of the top layer also results in a sound engineering Improvement since sound waves hitting the component are not complete are reflected, but partially penetrate into the foam layer and dampened or completely absorbed.
- a component 1 according to the invention has, as can be seen in FIGS. 3 and 5, a foamed layer 2, which is a metal powder and a blowing agent comprises, which are homogeneously mixed together by a mixing process and then under pressure, for example by axial pressing or by extrusion to a compact, foamable semi-finished product 2 '' has been compacted and solidified.
- a foamed layer 2 which is a metal powder and a blowing agent comprises, which are homogeneously mixed together by a mixing process and then under pressure, for example by axial pressing or by extrusion to a compact, foamable semi-finished product 2 '' has been compacted and solidified.
- the foamed layer 2 is on top and provided on the underside with a solid metal sheet 3, 4 each. It is also possible a foamed layer 2 with only one solid metallic To connect top layer 3 or 4 or groups of several different foamed layers, possibly separated by to produce solid metallic layers, for example to impact elements create, depending on the impact speed and thus energy different number of foamed layers on the deformation participates through the impact.
- a double-sided with solid metal sheets 3 and 4 provided foamed layer 2 is the connection between the layer 2 foamed at the end of the process and the solid metallic layer Sheets 3 and 4 came about under pressure in such a way that a metallic bond between the individual layers 2 ', 3', 4 'has been reached before the forming and foaming.
- roll cladding a composite from the foamable Semifinished product 2 '' after extrusion or axial pressing is created, and the solid metal sheets 3 '', 4 '' between make two rollers 5, so that a composite material 6 with a sandwich structure two solid metallic cover layers 3 'and 4' and one not yet foamed porous intermediate layer 2 'is formed.
- Such an essentially flat metallic composite material 6 the in any case comprises a foamable layer 2 ', has between the metallic sheets 3 'and 4' and the foamable layer 2 ' metallic bonds and is now available for further processing.
- This flat composite material 6 is initially more suitable in pieces Size divided, for example with the help of a saw.
- the semi-finished product thus formed is provided with perforations 14, 15.
- the perforations 14:15 are either discreetly done over a needle board or in a continuous process via a needle roller 16 in embossed the composite material 6.
- the holes 14 reach through the upper solid metal cover layer 3 and reach into the still foamable Layer 2 'with their front end regions.
- the perforations 15 reach through both the upper and lower solid metal Cover layer 3, 4 and completely penetrate through the channels still to be foamed Layer 2 '.
- During the foaming of the layer 2 ' close the channels of the holes 15 in the layer, so that only holes 15 in the outer layers 3 and 4 after the foaming has ended remain.
- the shaping can be carried out using known customary shaping measures, for example by deep drawing with and without hold-down devices, as is the case in body construction is known, or by a one-sided forming process, such as that Fluid cell method.
- a semi-finished product 7 is obtained, which is either flat or contains curved surface areas and possibly formed from this Contours and a foamable for further processing Layer 2 'includes.
- the semi-finished product 7 is placed in a foaming mold 9, one of which Wall 12 a side 10 of the semi-finished product 7 substantially covering the entire surface supports so that this side 10 already have its final contour must, since a further contouring by foaming the semi-finished product 7 to a component 1 no longer deform this side 10 brings itself.
- the walls 12, 13 of the foaming mold 9 can be made, for example Steel or ceramic. It is important that component 1 despite its internal pressure prevailing when foaming has no connection with the walls 12, 13 of the foam mold 9 is received. To stick together to prevent the walls 12, 13 can be coated.
- the gases formed by the splitting of the blowing agent at the appropriate temperature (depending on the blowing agent usually between 500 ° C. and 600 ° C.), in particular hydrogen, which is split off from a metal hydride, can go up through the perforations 14 and 15, respectively escape there.
- the discharging perforations 14, 15 have a distance of a few centimeters, approximately 2 to 5 cm, measured in the surface of the cover layer and form a regular geometric grid, so that the distances are always the same.
- the perforation surface is in the range between 0.5 and 3 mm 2 , for example, if square perforations are formed, an edge length of 1 mm can be used, so that a total perforation area of 1 mm 2 results. As a result, the perforations are sufficiently small so that they do not interfere with the finished component, for example they can be made almost or completely invisible by applying layers of paint.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
- Laminated Bodies (AREA)
- Motor Or Generator Frames (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
- Fig. 1
- das Herstellungsverfahren eines erfindungsgemäßen Bauteils im schematischen Überblick,
- Fig. 2
- ein Halbzeug, das eine Schaumwerkstoffschicht, die oberseitig und unterseitig von einer massivmetallischen Deckschicht begrenzt ist, mit durchgehenden Lochungen,
- Fig. 3
- eine ähnliche Ansicht wie Fig. 2 nach dem Aufschäumen.
- Fig. 4
- ein Halbzeug, das eine Schaumwerkstoffschicht aufweist, die oberseitig und unterseitig von jeweils einer massivmetallischen Deckschicht begrenzt ist, wobei Lochungen in der oberen massivmetallischen Deckschicht angeordnet sind und in die Schaumwerkstoffschicht eingreifen,
- Fig. 5
- ein Bauteil, das aus dem Halbzeug gemäß Fig. 4 durch Aufschäumen gebildet ist.
Claims (7)
- Bauteil (1), insbesondere Karosseriebauteil für Kraftfahrzeuge, mit einer einen metallischen Schaumwerkstoff umfassenden aufgeschäumten Schicht (2) sowie mit zumindest einer massivmetallischen Deckschicht (3;4), dadurch gekennzeichnet, daß die Deckschicht (3;4) ein Muster von diese durchdringenden Lochungen (14;15) aufweist.
- Bauteil nach Anspruch 1, dadurch gekennzeichnet, daß die Lochungen (14;15) ein regelmäßiges geometrisches Raster ausbilden.
- Bauteil nach einem der Ansprüche 1 oder 2, gekennzeichnet durch einen Abstand der Lochungen (14;15) zwischen 2 und 5 cm.
- Bauteil nach einem der Ansprüche 1 bis 3, gekennzeichnet durch eine Fläche der Lochungen (14;15) zwischen 0,5 mm2 und 3 mm2.
- Bauteil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Bauteil (1) eine ober- (3) und eine unterseitige (4) massivmetallische Deckschicht aufweist und die Lochungen (14) in der die Oberseite des Bauteils (1) bildenden massivmetallischen Deckschicht (3) ausgeführt sind.
- Bauteil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Lochungen (14;15) durch ein Nadelbrett oder eine Nadelwalze (16) in ein noch nicht zum Bauteil aufgeschäumtes Halbzeug eingebracht sind.
- Bauteil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß Lochungen (14;15) sich zumindest über einen Teilbereich der Dicke der aufgeschäumten Schicht (2) erstrecken.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29800006U DE29800006U1 (de) | 1998-01-02 | 1998-01-02 | Bauteil, insbesondere Karosseriebauteil für Kraftfahrzeuge |
DE29800006U | 1998-01-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0927590A2 true EP0927590A2 (de) | 1999-07-07 |
EP0927590A3 EP0927590A3 (de) | 1999-07-28 |
Family
ID=8050877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98122772A Withdrawn EP0927590A3 (de) | 1998-01-02 | 1998-12-01 | Eine aufgeschaumte Metallschicht enthaltender Karosseriebauteil für Kraftfahrzeuge |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0927590A3 (de) |
DE (1) | DE29800006U1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10136370B4 (de) * | 2001-07-26 | 2005-03-31 | Schwingel, Dirk, Dr. | Verbundwerkstoff und daraus hergestelltes Bauteil bestehend aus einem aufgeschäumten Metallkern und massiven Deckblechen, sowie Verfahren zur Herstellung |
WO2009092755A1 (de) * | 2008-01-26 | 2009-07-30 | Jost-Werke Gmbh | Fahrzeugkupplung zum herstellen einer mechanischen verbindung zwischen einem ersten und einem zweiten fahrzeug |
US10300961B2 (en) | 2008-01-26 | 2019-05-28 | Jost-Werke Deutschland Gmbh | Vehicle coupling |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19947719A1 (de) * | 1999-10-05 | 2001-04-12 | Daimler Chrysler Ag | Wärmebehandelte Karosserie - "body-in-blue" |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3905871A1 (de) * | 1989-02-24 | 1990-08-30 | Reinz Dichtungs Gmbh | Verbundmaterial |
NL9102117A (nl) * | 1991-12-18 | 1993-02-01 | Stork Screens Bv | Poreus metaalhoudend laminaat en werkwijze voor het vervaardigen daarvan. |
-
1998
- 1998-01-02 DE DE29800006U patent/DE29800006U1/de not_active Expired - Lifetime
- 1998-12-01 EP EP98122772A patent/EP0927590A3/de not_active Withdrawn
Non-Patent Citations (2)
Title |
---|
"INDUSTRIELLE NUTZUNG VON STAHLBLECHVERBUNDWERKSTOFFEN MIT GESCHAEUMTEM ALUMINIUM", BERICHTE AUS DER ANWENDUNGSFORSCHUNG, XX, XX, 1 January 1997 (1997-01-01), XX, pages COMPLETE, XP000889431 |
R.A. WEBER: "STUDIENGESELLSCHAFT STAHLANWENDUNG E. V.", part 1 1997, VERLAG UND VERTRIEBSGESELLSCHAFT MBH, GERMANY, ISBN: 3-930621-65-7, article "FORSCHUNGSBERICHT P 281.1 INDUSTRIELLE NUTZUNG VON STAHLBLECHVERBUNDWERKSTOFFEN MIT GESCHÄUMTEM ALUMINIUM", XP000889430 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10136370B4 (de) * | 2001-07-26 | 2005-03-31 | Schwingel, Dirk, Dr. | Verbundwerkstoff und daraus hergestelltes Bauteil bestehend aus einem aufgeschäumten Metallkern und massiven Deckblechen, sowie Verfahren zur Herstellung |
WO2009092755A1 (de) * | 2008-01-26 | 2009-07-30 | Jost-Werke Gmbh | Fahrzeugkupplung zum herstellen einer mechanischen verbindung zwischen einem ersten und einem zweiten fahrzeug |
US8382146B2 (en) | 2008-01-26 | 2013-02-26 | Jost-Werke Gmbh | Vehicle coupling for producing a mechanical connection between a first and second vehicle |
US10300961B2 (en) | 2008-01-26 | 2019-05-28 | Jost-Werke Deutschland Gmbh | Vehicle coupling |
Also Published As
Publication number | Publication date |
---|---|
DE29800006U1 (de) | 1999-05-06 |
EP0927590A3 (de) | 1999-07-28 |
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