EP0849018A1 - Pièce en matériau léger et son procédé de fabrication - Google Patents

Pièce en matériau léger et son procédé de fabrication Download PDF

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Publication number
EP0849018A1
EP0849018A1 EP97120986A EP97120986A EP0849018A1 EP 0849018 A1 EP0849018 A1 EP 0849018A1 EP 97120986 A EP97120986 A EP 97120986A EP 97120986 A EP97120986 A EP 97120986A EP 0849018 A1 EP0849018 A1 EP 0849018A1
Authority
EP
European Patent Office
Prior art keywords
foam
light metal
workpiece
workpiece according
bodies
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
EP97120986A
Other languages
German (de)
English (en)
Other versions
EP0849018B1 (fr
Inventor
Klaus Dr. Eigenfeld
Dietmar Hoffmann
Peter Dr. Niedner
Matthias Franke
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.)
Technum Institut Dr Niedner fur Technologie und Umwelt GmbH
Bayerische Motoren Werke AG
Original Assignee
Technum Institut Dr Niedner fur Technologie und Umwelt GmbH
Bayerische Motoren Werke 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 Technum Institut Dr Niedner fur Technologie und Umwelt GmbH, Bayerische Motoren Werke AG filed Critical Technum Institut Dr Niedner fur Technologie und Umwelt GmbH
Publication of EP0849018A1 publication Critical patent/EP0849018A1/fr
Application granted granted Critical
Publication of EP0849018B1 publication Critical patent/EP0849018B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form

Definitions

  • the invention relates to Workpiece made of a lightweight material and on a manufacturing process.
  • a lightweight workpiece known for example from DE-C 195 01 508 is a component made of die-cast aluminum, which has a cavity profile, wherein a core made of aluminum foam is permanently arranged in the cavity.
  • This aluminum foam core stiffening the component is formed from a mixture of aluminum powder with a blowing agent that is at the appropriate temperature a gas releases to foam the aluminum powder.
  • This foam mass of closed Porosity has a density of about 0.6-0.7 grams per cc.
  • a light material is also known from the generic DE-A 38 16 517, the body of which is made up of any material of any material and forms a workpiece has hollow balls arranged relatively densely packed. This, for example, according to the hollow spheres described in column 1 of DE-A 43 40 347 are for the formation of a high pressure-resistant lightweight workpiece To absorb the pressure loads from expensive, high-quality material such as Nickel, molybdenum, tungsten or copper or from high-quality ceramic.
  • the invention has for its object for a lightweight workpiece of high Strength is a pourable filling material that is inexpensive to manufacture to show lightweight training.
  • the advantage of the invention lies in the use of pourable filling bodies from a mineral foam, which is high due to the structural structure pressure-resistant foam body depending on the material used on the one hand and their final Size with a small initial mass, on the other hand the possibility of a desired low density open up for a workpiece of light weight and high Strength at low manufacturing costs.
  • DE-P 195 45 187 described silicate mineral foam use that training foam bodies, their open to closed surface each belongs to a shell that has a larger-pore inner core according to Art of an integral foam.
  • each Foam body results on the one hand with the larger-pore inner core in a more advantageous manner Way a weight or density reduction, the shell with its particular closed surface in an advantageous manner of punctiform introduction great forces.
  • the compressive strength of the shells of the foam body can also be increased by a o.g. DE-P 195 45 187 process step further described by ceramicizing be increased.
  • the high-strength foam bodies are used to form a lightweight workpiece of low density by means of sintering and / or impregnation with a Light metal alloy connected to determine shape.
  • balls / grains designed foam body particularly advantageous, each with a diameter of 0.5 mm to 16 mm.
  • a foam body designed according to the invention from shape-defining connected foam bodies Workpiece opens in a further advantageous manner by one of foam bodies recessed area the arrangement of a functional device such as a Bolts, a threaded blind hole etc. in the recess after the impregnation remaining cast metal. This has the advantage of a simplified design of the workpiece.
  • a workpiece with foam body / balls connected by means of a light metal alloy are preferably made of a silicate mineral foam
  • the formulation limits for the inner core of a foam body 40 - 75% SiO2, 0 - 20% Al2O3, 1 - 25% CaO, 0 - 10% Fe2O3, 0 - 26% alkali and 0 - 5% rest with a heavy metal content up to 3% and the recipe limits for the shell integrally connected to the inner core as for the inner core with the exception of a heavy metal residue set below 0.1%.
  • a workpiece is made of light metal soaked Foam bodies with a density of about 0.3 grams per ccm achieved.
  • the invention is based on a preferred, in the drawing schematically in cross section described workpiece described.
  • a workpiece 1 cast from an aluminum alloy comprises a core space 2 with a core 3 remaining in the core space 2 after casting.
  • This compressive strength of the shells of the foam body 4 can according to one of the aforementioned
  • the method specified in the patent application is additionally increased as a result that the bowls are ceramized.
  • the foam bodies are used to design the casting core 3 or the workpiece 1 4 by means of sintering and / or impregnation with the aluminum alloy in a separate Core or model form tied to form or form determining, whereby for reasons of strength on the one hand and handling on the other Design of the foam body 4 as balls 4 has proven advantageous with each a diameter of 0.5 - 16 mm.
  • An advantageous embodiment, in particular of the casting core 3, also results through a recessed area 5 of foam bodies 4 for the arrangement of a Functional device 6, such as a screw bolt or a threaded blind hole 7 in the casting metal remaining in the recess 5 after the metal impregnation.
  • a Functional device 6 such as a screw bolt or a threaded blind hole 7 in the casting metal remaining in the recess 5 after the metal impregnation.
  • the foam bodies 4 or Balls 4 preferably with regard to the aluminum alloy used inexpensive silicate mineral foam according to the aforementioned DE-P 195 45 187, the recipe limits for the inner core of a foam body ball 4 40 - 65% SiO2, 1 - 20% Al2O3, 1 - 25% CaO, 1 - 10% Fe2O3, 5 - 14% alkali and 0 - 5% rest with a heavy metal content up to 3% and the formulation limits for the shell integrally connected to the inner core as for the inner core with the exception of a heavy metal residue set below 0.1% are determined.
  • a casting core 3 is of high quality Compressive strength and reduced weight with a density of 0.3 grams per ccm reached.
  • the Core 3 In order to keep the weight of the casting core 3 low despite the metal watering, the Core 3 according to an interpretation of claim 6 made of foam body / balls 4 be selected from different diameters, the balls not shown 4 smaller diameters in the spaces between those in diameter large balls are placed.
  • the casting core 3 for a workpiece 1 is produced from an aluminum alloy for example, in such a way that foam body 4 is placed on the aluminum alloy Mineral foam according to claim 9 as a fill in a predetermined shape entered with a material temperature of 1100-700 ° C after the foaming process stage and soaked with the aluminum alloy, the cooling in the mold Casting core 3 undergoes annealing.
  • the method described above is also suitable for other types of workpieces, whereby the workpieces made entirely of mineral foam bodies with one Light metal as a binder or a core made of mineral foam bodies and a light metal as a binder in combination with an outer enclosure made of light metal or a core of mineral foam bodies and light metal as a binder with specifically created voids in the core and an outer Enclosure are made of light metal.
  • the workpiece can be used as a heat insulating and / or sound-absorbing device, in particular as lining or cladding.
  • the invention can also be advantageous in the configuration of a workpiece as one serve energy-absorbing element.
  • This is preferably used in a safety device of a motor vehicle, esp. Cars.
  • a safety device of a motor vehicle esp. Cars.
  • a Element in a chassis structure or in a body-side bumper be arranged.
  • Another advantageous embodiment of the invention results from the training of the workpiece as a semi-finished product with the highest in the area of the neutral zone Concentration of foam bodies / balls.
  • the mineral foam bodies fall as a bed with a material temperature of 1100-700 ° C after the Foam process step continuously in molds or in a distribution device the molds, the foam body being fed continuously with a Light metal melt are soaked, which act as binders of the merger Foam body is used for individual or endless semi-finished products, the rest of the case the cooling are also annealed to relieve stress.
  • the mineral foam bodies fall as a bed with a material temperature from 1100-700 ° C after the foaming process stage continuously in molds or in a distribution device to the molds and are continuously filled with powder a light metal alloy in the temperature range of 1100-700 ° C with exclusion of air or protective gas (CO2, N2) breaded and then reheated Mineral foam body with coded light metal surface with no air or under protective gas at a temperature between 600 - 1000 ° C results in a fusion or sintering the foam body over the applied surface coatings designed as a single or endless molded body Workpieces are tempered with cooling Stress relief beneficial.
  • CO2, N2 air or protective gas
  • the foam body connecting the shape determining Light metal alloy of the composite material to increase strength be fiber and / or particle reinforced.
  • the fibers and the Foam bodies formed a preform, which then with the light metal alloy is treated or soaked.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Finishing Walls (AREA)
EP97120986A 1996-12-19 1997-11-28 Pièce en matériau léger et son procédé de fabrication Expired - Lifetime EP0849018B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19653149 1996-12-19
DE19653149A DE19653149A1 (de) 1996-12-19 1996-12-19 Werkstück aus einem Leichtbau-Werkstoff und Verfahren zur Herstellung des Werkstückes

Publications (2)

Publication Number Publication Date
EP0849018A1 true EP0849018A1 (fr) 1998-06-24
EP0849018B1 EP0849018B1 (fr) 2002-03-06

Family

ID=7815441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120986A Expired - Lifetime EP0849018B1 (fr) 1996-12-19 1997-11-28 Pièce en matériau léger et son procédé de fabrication

Country Status (3)

Country Link
EP (1) EP0849018B1 (fr)
DE (2) DE19653149A1 (fr)
ES (1) ES2171820T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1016478A1 (fr) * 1998-12-30 2000-07-05 Gut Giesserei Umwelt Technik GmbH Procédé de formation de cavités dans des éléments de construction
AT500842B1 (de) * 2004-12-23 2006-04-15 Avl List Gmbh Zylinder-kurbelgehäuse für eine brennkraftmaschiene
EP1844881A3 (fr) * 2006-04-10 2007-11-21 Kurtz GmbH Procédé destiné à la fabrication de composants à pores ouverts en métal, plastique ou céramique dotés d'une structure de grille de mousse ordonnée
EP2420335A1 (fr) * 2010-08-20 2012-02-22 Hofmann Ceramic GmbH Procédé de fabrication de matière composite à matrice métallique en céramique et pièce de formage fabriquée selon ce procédé

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19908867A1 (de) * 1999-03-01 2000-09-07 Arved Huebler Verbundkörper sowie Verfahren zum Herstellen eines Verbundkörpers
DE10035202A1 (de) * 2000-07-20 2002-01-31 Opel Adam Ag Gießverfahren und Gusskern für die Verwendung in diesem Verfahren
DE102009035702A1 (de) * 2009-07-30 2011-02-03 Benteler Automobiltechnik Gmbh Fahrwerksbauteil für ein Kraftfahrzeug und Verfahren zur Herstellung

Citations (9)

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Publication number Priority date Publication date Assignee Title
DE1571388A1 (de) * 1966-07-18 1970-12-17 Celotex Corp Verfahren zur Herstellung von poroesen keramischen Produkten
US3810773A (en) * 1971-12-02 1974-05-14 Owens Corning Fiberglass Corp Strong light weight,bonded,porous aggregate
US4947924A (en) * 1987-04-10 1990-08-14 Sumitomo Metal Industries, Ltd. Metal-ceramic composite and method of producing the same
JPH0558760A (ja) * 1991-09-05 1993-03-09 Mitsubishi Materials Corp 多孔質焼結体及びその製造方法
US5329983A (en) * 1991-10-08 1994-07-19 Arnold J. Cook Sealed chamber die castings of metal matrix components
DE4410242A1 (de) * 1994-03-24 1994-08-25 Wolfgang Dipl Ing Jehra Keramische Verklebung und Umhüllung von Blähton
DE4340347A1 (de) * 1993-11-26 1995-06-01 Audi Ag Träger für Kraftfahrzeuge
DE29506090U1 (de) * 1995-04-07 1995-06-01 Dennert Poraver GmbH, 92353 Postbauer-Heng Schallabsorbierender Belag auf einer durchgehenden Tragplatte eines Gleisoberbaus
US5524699A (en) * 1994-02-03 1996-06-11 Pcc Composites, Inc. Continuous metal matrix composite casting

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DE942471C (de) * 1952-01-01 1956-05-03 Alfred Graeter Bauelement hoher Festigkeit
DE6948849U (de) * 1969-12-16 1970-04-02 Gassel Reckmann & Co Gerko Wer Fahrzeug-schalldaemmverkleidung aus schaumstoff
US3781170A (en) * 1971-07-15 1973-12-25 Kureha Chemical Ind Co Ltd Lightweight metal composite material and process for producing same
CH582289A5 (fr) * 1974-12-18 1976-11-30 Liguori Philippe N Di
DE7720966U1 (de) * 1977-07-05 1977-10-13 Teroson Gmbh, 6900 Heidelberg Schaumstoffstreifen
DE2917687C2 (de) * 1979-05-02 1985-09-12 Audi AG, 8070 Ingolstadt Stoßpolster für Fahrzeuge
DE8700919U1 (de) * 1987-01-21 1987-03-05 H.W. Meckenstock KG, 4020 Mettmann Hitzeschild
DE3816517A1 (de) * 1988-05-14 1989-11-23 Gerd Dr Ing Kellner Leichtmaterial
DE4011948A1 (de) * 1990-04-12 1991-10-17 Alcan Gmbh Verbundgussverfahren
US5041472A (en) * 1990-12-19 1991-08-20 Hughes Aircraft Company Syntactic foam energy absorber
DE9301234U1 (de) * 1992-02-20 1993-03-18 Lydall Gerhardi GmbH & Co.KG, 58511 Lüdenscheid Wärme- und Schallisolationsformteil
JP3349186B2 (ja) * 1993-01-12 2002-11-20 富士重工業株式会社 発泡アルミニウム製品の製造法
DE4318540A1 (de) * 1993-06-04 1994-12-08 Bayerische Motoren Werke Ag Verfahren und Vorrichtung zur Herstellung eines Verbundbauteils
GB9414660D0 (en) * 1994-07-20 1994-09-07 Gkn Sankey Ltd An article and method for its production
DE19501508C1 (de) * 1995-01-19 1996-04-25 Lemfoerder Metallwaren Ag Bauteil für das Fahrwerk eines Kraftfahrzeuges und Verfahren zur Herstellung eines solchen Bauteils
DE29504011U1 (de) * 1995-03-09 1995-06-14 Deutsche Basaltsteinwolle GmbH, 37120 Bovenden Formkörper

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1571388A1 (de) * 1966-07-18 1970-12-17 Celotex Corp Verfahren zur Herstellung von poroesen keramischen Produkten
US3810773A (en) * 1971-12-02 1974-05-14 Owens Corning Fiberglass Corp Strong light weight,bonded,porous aggregate
US4947924A (en) * 1987-04-10 1990-08-14 Sumitomo Metal Industries, Ltd. Metal-ceramic composite and method of producing the same
JPH0558760A (ja) * 1991-09-05 1993-03-09 Mitsubishi Materials Corp 多孔質焼結体及びその製造方法
US5329983A (en) * 1991-10-08 1994-07-19 Arnold J. Cook Sealed chamber die castings of metal matrix components
DE4340347A1 (de) * 1993-11-26 1995-06-01 Audi Ag Träger für Kraftfahrzeuge
US5524699A (en) * 1994-02-03 1996-06-11 Pcc Composites, Inc. Continuous metal matrix composite casting
DE4410242A1 (de) * 1994-03-24 1994-08-25 Wolfgang Dipl Ing Jehra Keramische Verklebung und Umhüllung von Blähton
DE29506090U1 (de) * 1995-04-07 1995-06-01 Dennert Poraver GmbH, 92353 Postbauer-Heng Schallabsorbierender Belag auf einer durchgehenden Tragplatte eines Gleisoberbaus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 119, no. 6, 9 August 1993, Columbus, Ohio, US; abstract no. 54657p, H. SHIMADA: "High-strength lightweight porous ceramics for furnace and sheath materials and their manufacture" page 342; XP000405025 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1016478A1 (fr) * 1998-12-30 2000-07-05 Gut Giesserei Umwelt Technik GmbH Procédé de formation de cavités dans des éléments de construction
AT500842B1 (de) * 2004-12-23 2006-04-15 Avl List Gmbh Zylinder-kurbelgehäuse für eine brennkraftmaschiene
EP1844881A3 (fr) * 2006-04-10 2007-11-21 Kurtz GmbH Procédé destiné à la fabrication de composants à pores ouverts en métal, plastique ou céramique dotés d'une structure de grille de mousse ordonnée
US7588069B2 (en) 2006-04-10 2009-09-15 Kurtz Gmbh Method for manufacturing open porous components of metal, plastic or ceramic with orderly foam lattice structure
EP2420335A1 (fr) * 2010-08-20 2012-02-22 Hofmann Ceramic GmbH Procédé de fabrication de matière composite à matrice métallique en céramique et pièce de formage fabriquée selon ce procédé

Also Published As

Publication number Publication date
DE59706548D1 (de) 2002-04-11
DE19653149A1 (de) 1998-06-25
ES2171820T3 (es) 2002-09-16
EP0849018B1 (fr) 2002-03-06

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