EP0902095A2 - Process for the manufacture of a light metal cast part with good damping capacity characteristics - Google Patents
Process for the manufacture of a light metal cast part with good damping capacity characteristics Download PDFInfo
- Publication number
- EP0902095A2 EP0902095A2 EP98109036A EP98109036A EP0902095A2 EP 0902095 A2 EP0902095 A2 EP 0902095A2 EP 98109036 A EP98109036 A EP 98109036A EP 98109036 A EP98109036 A EP 98109036A EP 0902095 A2 EP0902095 A2 EP 0902095A2
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- EP
- European Patent Office
- Prior art keywords
- wire
- damping
- light metal
- texture
- cast
- 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
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/06—Special casting characterised by the nature of the product by its physical properties
Definitions
- the invention relates to Process for increasing the damping of a cast component made of a light metal material, the damping increased by means of an additional element becomes.
- SiC, graphite, Al 2 O 3 particles and graphite, W, B, SiC, Al 2 O3 fibers are predominantly used as the reinforcement phase in the sense of an additional element that increases the damping.
- the composite materials are manufactured using the technologies of melt metallurgy, powder metallurgy and spray compacting. Another possibility for achieving a higher damping of the light metal materials is the production of porous materials.
- the porous structures can be adjusted using sintering technology and spray compacting.
- a porous material is also present in the metal foams produced by powder metallurgy and melt metallurgy.
- the design of the components with ribbing to minimize the Sound radiation is disadvantageous and widespread for reasons of weight and space not possible.
- the disadvantages of composite materials are in particular the higher ones Manufacturing costs by introducing the reinforcement phase or the additional Damping element in the matrix material and the problems with the complex Recycling of such materials.
- the porous materials are Compared to the solid material, the mechanical properties are significantly poorer a major disadvantage.
- the invention has for its object a for the method to increase To show a suitable additional element for the natural damping of the light metal material.
- Wire inlays in light metal components are e.g. from DE-B 1 134 481 for the purpose the component reinforcement is known. This is also the use of metallic fibers known for example from DE-A 26 44 272. Mats made of metallic threads in Cast components are described in US Pat. No. 3,098,723. Finally, it is from DE-Z "Archive for the ironworks, 43rd year, volume 7, July 1972, pages 571 - 575 '' known to cast wires in aluminum or magnesium for component reinforcement, however, an increased internal damping in the sense of the invention is not disclosed anywhere.
- the advantage of the invention over the solid material is a multiple increase the internal damping of the light metal material used for a cast component to see, in the embodiment of the method according to the invention Claim 2 a particularly high damping is achieved in that the wire texture as a knitted fabric made of a wire made of a highly damping nickel material is formed with a purity of at least 99%, with a round or Flat wire with a diameter of 0.05 - 0.6 mm is used.
- a particularly high damping is achieved in that the wire texture as one Pressed molded part made of multi-layer wire mesh with interlocking loops Mesh is formed, the wire mesh molding for pickled better.
- the light metal material is preferably used to form a wire knit with a mesh pitch of 2 - 30 mm and with a mesh length of 1.5 - 15 mm used.
- the method according to the invention is particularly found Use for die-cast components, these in a further embodiment can be as vehicle and / or machine-bound die-cast components such as. an oil pan, a gearbox cover, a cylinder head cover, a gearbox, Etc.
- the wire texture designed as a casting insert can be made from a fabric-like ordered structure and / or formed from a mat-like, disordered structure be such that a porosity for substantially complete infiltration is achieved through the light metal matrix.
- the process according to the invention takes the form of a die-cast part made of an aluminum alloy
- an element of such a heavy metal or Heavy metal alloy formed by great internal damping and when casting in essential completely infiltrable wire texture used as a casting insert that in the connection areas of the light metal matrix and heavy metal wires an energy input through sound or structure-borne sound through to the wires longitudinally elastic deformations an increase in material damping in the cast component is effected.
- the longitudinal elastic deformations caused by energy input are based in particular on dislocation movements, on interface friction as well as on grain boundary gliding.
- the knitted fabric from a wire made of a highly damping nickel material with a purity of at least 99% formed is chosen in terms of its density such that a porosity of the wire mesh for an essentially complete infiltration through the aluminum alloy is specified.
- Particularly high damping is achieved that the wire texture as a pressed molded part from multi-layer wire knitted webs is formed with interlocking meshes, the Wire knit molding is pickled for better pourability.
- a die-cast part with a casting insert made of a nickel wire knit results in opposite a die-cast part made of a solid aluminum alloy multiple Self-damping.
- a die-cast part with the inherent damping achieved according to the invention has an advantageous effect at frequencies such as those found in drive units of motor vehicles occur.
- a wire texture can also be used as a knitted fabric made of a wire made of a highly damping ferritic FeCrAl 20 5 steel are formed, preferably also as pressed and pickled Wire knit molding.
- a wire texture serving as a casting insert can also be used be formed from wires of both materials.
- the wire texture designed as a casting insert can also be a fabric-like one ordered structure and / or from a mat-like, disordered structure be formed such that a porosity for substantially complete infiltration is achieved by the respective light metal matrix.
- the method according to the invention offers, in addition to the advantageously sound-absorbing Effect the further advantage that through the use of metallic wire mesh the highly damping light metal material easily and completely is recyclable.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Die Erfindung bezieht sich nach dem Oberbegriff des Patentanspruches 1 auf ein Verfahren zur Steigerung der Dämpfung eines Gußbauteiles aus einem Leichtmetallwerkstoff, wobei die Dämpfung mittels eines zusätzlichen Elementes gesteigert wird.According to the preamble of claim 1, the invention relates to Process for increasing the damping of a cast component made of a light metal material, the damping increased by means of an additional element becomes.
Die im Stand der Technik für die Herstellung von Automobilkomponenten wie beispielsweise einer Ölwanne oder eines Räderkastendeckels verwendeten Leichtmetallwerkstoffe, beispielsweise Aluminium- und Magnesiumlegierungen, werden hauptsächlich unter Berücksichtigung der im Betriebseinsatz der Komponenten vorherrschenden thermo-mechanischen Beanspruchungen ausgelegt. Diese Werkstoffe weisen jedoch ein geringes Dämpfungsverhalten auf, wodurch Schall und Körperschall im wesentlichen nicht reduziert weitergeleitet werden. Eine Verbesserung des Dämpfungsverhaltens dieser Leichtmetallwerkstoffe konnte einerseits durch Verrippung der Bauteile und andererseits mit dem Einsatz von Verbundwerkstoffen erreicht werden.The state of the art for the manufacture of automotive components such as an oil pan or a gear case cover used light metal materials, for example aluminum and magnesium alloys mainly taking into account the prevailing components in operation designed for thermo-mechanical stresses. These materials However, have a low damping behavior, whereby sound and Structure-borne noise is essentially not passed on in a reduced manner. An improvement the damping behavior of these light metal materials could on the one hand by ribbing the components and on the other hand with the use of composite materials can be achieved.
Als Verstärkungsphase im Sinne eines zusätzlichen, die Dämpfung steigernden Elementes werden bei den Verbundwerkstoffen vorwiegend SiC-, Graphit-, Al2O3-Partikel sowie Graphit-, W-, B-, SiC-, Al2O3-Fasern eingesetzt. Die Verbundwerkstoffe werden unter Verwendung der Technologien der Schmelzmetallurgie, der Pulvermetallurgie und des Sprühkompaktierens hergestellt. Eine weitere Möglichkeit zur Erzielung einer höheren Dämpfung der Leichtmetallwerkstoffe besteht in der Herstellung von porösen Materialien. Die porösen Strukturen können mit Hilfe der Sintertechnologie und des Sprühkompaktierens eingestellt werden. Ein poröser Werkstoff liegt auch bei den pulvermetallurgisch und schmelzmetallurgisch erzeugten Metallschäumen vor.SiC, graphite, Al 2 O 3 particles and graphite, W, B, SiC, Al 2 O3 fibers are predominantly used as the reinforcement phase in the sense of an additional element that increases the damping. The composite materials are manufactured using the technologies of melt metallurgy, powder metallurgy and spray compacting. Another possibility for achieving a higher damping of the light metal materials is the production of porous materials. The porous structures can be adjusted using sintering technology and spray compacting. A porous material is also present in the metal foams produced by powder metallurgy and melt metallurgy.
Die konstruktive Auslegung der Bauteile mit Verrippungen zur Minimierung der Schallabstrahlung ist aus Gewichts- und Bauraumgründen nachteilig und vielfach nicht möglich. Die Nachteile der Verbundwerkstoffe sind insbesondere die höheren Herstellungskosten durch das Einbringen der Verstärkungsphase bzw. des zusätzlichen Dämpfungselementes in den Matrixwerkstoff und die Probleme beim aufwendigen Recycling derartiger Werkstoffe. Bei den porösen Werkstoffen sind die im Vergleich zu dem Vollmaterial deutlich schlechteren mechanischen Eigenschaften ein wesentlicher Nachteil.The design of the components with ribbing to minimize the Sound radiation is disadvantageous and widespread for reasons of weight and space not possible. The disadvantages of composite materials are in particular the higher ones Manufacturing costs by introducing the reinforcement phase or the additional Damping element in the matrix material and the problems with the complex Recycling of such materials. For the porous materials, the are Compared to the solid material, the mechanical properties are significantly poorer a major disadvantage.
Der Erfindung liegt die Aufgabe zugrunde, ein für das Verfahren zur Steigerung der Eigendämpfung des Leichtmetallwerkstoffes geeignetes zusätzliches Element aufzuzeigen.The invention has for its object a for the method to increase To show a suitable additional element for the natural damping of the light metal material.
Diese Aufgabe ist mit dem Patentanspruch 1 gelöst und zwar dadurch, daß als Element eine aus einem derartigen Schwermetall oder einer Schwermetall-Legierung von großer Eigendämpfung gebildete und beim Gießen im wesentlichen vollständig infiltrierbare Draht-Textur als Gießeinlage verwendet wird, daß in den Verbindungsbereichen von Leichtmetall-Matrix und Schwermetall-Drähten bei einem Energieeintrag (Schall, Körperschall) durch zu den Drähten längselastische Verformungen eine Steigerung der Materialdämpfung im Gußbauteil bewirkt wird.This object is achieved with claim 1, namely in that as an element one of such a heavy metal or a heavy metal alloy formed by great self-damping and essentially complete during casting infiltrable wire texture is used as a casting insert that in the connection areas of light metal matrix and heavy metal wires with an energy input (Sound, structure-borne sound) due to elastic deformations to the wires an increase in material damping in the cast component is effected.
Drahteinlagen in Leichtmetallbauteilen sind z.B. aus der DE-B 1 134 481 zum Zweck der Bauteilverstärkung bekannt. Hierfür ist auch der Einsatz metallischer Fasern beispielsweise aus der DE-A 26 44 272 bekannt. Matten aus metallischen Fäden in Gußbauteilen beschreibt die US-A 3 098 723. Schließlich ist es aus der DE-Z "Archiv für das Eisenhüttenwesen, 43. Jahrgang, Heft 7, Juli 1972, Seiten 571 - 575'' bekannt, in Aluminium oder Magnesium Drähte einzugießen zur Bauteilverstärkung, eine gesteigerte Eigendämpfung im Sinne der Erfindung ist jedoch nirgends geoffenbart.Wire inlays in light metal components are e.g. from DE-B 1 134 481 for the purpose the component reinforcement is known. This is also the use of metallic fibers known for example from DE-A 26 44 272. Mats made of metallic threads in Cast components are described in US Pat. No. 3,098,723. Finally, it is from DE-Z "Archive for the ironworks, 43rd year, volume 7, July 1972, pages 571 - 575 '' known to cast wires in aluminum or magnesium for component reinforcement, however, an increased internal damping in the sense of the invention is not disclosed anywhere.
Der Vorteil der Erfindung ist gegenüber dem Vollmaterial in einer mehrfachen Steigerung der Eigendämpfung des für ein Gußbauteil verwendeten Leichtmetallwerkstoffes zu sehen, wobei in Ausgestaltung des erfindungsgemäßen Verfahrens nach Anspruch 2 eine besonders hohe Dämpfung dadurch erreicht wird, daß die Draht-Textur als ein Gestrick aus einem Draht aus einem hochdämpfenden Nickel-Werkstoff mit einer Reinheit von mindestens 99 % gebildet wird, wobei ein Rund- oder Flachdraht mit einem Durchmesser von 0,05 - 0,6 mm verwendet wird.The advantage of the invention over the solid material is a multiple increase the internal damping of the light metal material used for a cast component to see, in the embodiment of the method according to the invention Claim 2 a particularly high damping is achieved in that the wire texture as a knitted fabric made of a wire made of a highly damping nickel material is formed with a purity of at least 99%, with a round or Flat wire with a diameter of 0.05 - 0.6 mm is used.
Gemäß einer anderen Ausgestaltung des erfindungsgemäßen Verfahrens ist in Verbindung einer aus einer Alu-Legierung gebildeten Leichtmetallmatrix die Draht-Textur als ein Gestrick aus einem Draht aus einem hochdämpfenden ferritischen FeCrAl 20 5-Stahl gebildet.According to another embodiment of the method according to the invention, is connected the wire texture of a light metal matrix formed from an aluminum alloy as a knitted fabric made of a wire made of a highly damping ferritic FeCrAl 20 5-steel formed.
Eine besonders hohe Dämpfung wird dadurch erreicht, daß die Draht-Textur als ein gepreßtes Formteil aus mehrlagigen Drahtgestrickbahnen mit schlingenförmig ineinandergreifenden Maschen gebildet wird, wobei das Drahtgestrick-Formteil zur besseren Eingießbarkeit gebeizt wird. Für eine im wesentlichen vollständige Infiltration durch den Leichtmetallwerkstoff wird vorzugsweise ein Drahtgestrick-Formteil mit einer Maschenteilung von 2 - 30 mm und mit einer Maschenlänge von 1,5 - 15 mm verwendet.A particularly high damping is achieved in that the wire texture as one Pressed molded part made of multi-layer wire mesh with interlocking loops Mesh is formed, the wire mesh molding for pickled better. For essentially complete infiltration The light metal material is preferably used to form a wire knit with a mesh pitch of 2 - 30 mm and with a mesh length of 1.5 - 15 mm used.
Gemäß einem weiteren Unteranspruch findet das erfindungsgemäße Verfahren insbesondere Verwendung für Druckgußbauteile, wobei diese in weiterer Ausgestaltung als fahrzeug- und/oder maschinengebundene Druckguß-Bauteile sein können wie z.B. eine Ölwanne, ein Räderkastendeckel, eine Zylinderkopfhaube, ein Getriebegehäuse, etc.According to a further subclaim, the method according to the invention is particularly found Use for die-cast components, these in a further embodiment can be as vehicle and / or machine-bound die-cast components such as. an oil pan, a gearbox cover, a cylinder head cover, a gearbox, Etc.
Schließlich kann die als Gießeinlage gestaltete Draht-Textur aus einer gewebeartig geordneten Struktur und/oder aus einer mattenartigen, ungeordneten Struktur gebildet sein derart, daß eine Porosität für eine im wesentlichen vollständige Infiltration durch die Leichtmetallmatrix erzielt wird.Finally, the wire texture designed as a casting insert can be made from a fabric-like ordered structure and / or formed from a mat-like, disordered structure be such that a porosity for substantially complete infiltration is achieved through the light metal matrix.
Die Erfindung ist im nachfolgenden näher beschrieben.The invention is described in more detail below.
Für die Herstellung beispielsweise einer Ölwanne oder eines Räderkastendeckels als Druckgußteil aus einer Alu-Legierung findet das erfindungsgemäße Verfahren zur Steigerung der Eigendämpfung des Leichtmetallwerkstoffes Verwendung, wobei die Dämpfung mittels eines zusätzlichen Elementes gesteigert wird. Erfindungsgemäß wird als Element eine aus einem derartigen Schwermetall oder einer Schwermetall-Legierung von großer Eigendämpfung gebildete und beim Gießen im wesentlichen vollständig infiltrierbare Draht-Textur als Gießeinlage verwendet, daß in den Verbindungsbereichen von Leichtmetall-Matrix und Schwermetall-Drähten bei einem Energieeintrag durch Schall- oder Körperschall durch zu den Drähten längselastische Verformungen eine Steigerung der Materialdämpfung im Gußbauteil bewirkt wird. Die durch Energieeintrag ausgelösten längselastischen Verformungen beruhen insbesondere aus Versetzungsbewegungen, auf Grenzflächenreibung sowie auf Korngrenzengleiten.For the production of, for example, an oil pan or a gear case cover the process according to the invention takes the form of a die-cast part made of an aluminum alloy Use to increase the internal damping of the light metal material the damping is increased by means of an additional element. According to the invention is an element of such a heavy metal or Heavy metal alloy formed by great internal damping and when casting in essential completely infiltrable wire texture used as a casting insert that in the connection areas of the light metal matrix and heavy metal wires an energy input through sound or structure-borne sound through to the wires longitudinally elastic deformations an increase in material damping in the cast component is effected. The longitudinal elastic deformations caused by energy input are based in particular on dislocation movements, on interface friction as well as on grain boundary gliding.
Die entsprechend der Größe der schallabstrahlfähigen Fläche des jeweiligen Druckgußteiles angepaßte Draht-Textur ist vorzugsweise als ein Gestrick aus einem Draht aus einem hochdämpfenden Nickel-Werkstoff mit einer Reinheit von mindestens 99 % gebildet, wobei das Gestrick aus einem Rund- oder Flachdraht von 0,05 - 0,6 mm Durchmesser bezüglich seiner Dichte derart gewählt ist, daß eine Porosität des Drahtgestrickes für eine im wesentlichen vollständige Infiltration durch die Alu-Legierung vorgegeben wird. Eine besonders hohe Dämpfung wird dadurch erreicht, daß die Draht-Textur als ein gepreßtes Formteil aus mehrlagigen Drahtgestrickbahnen mit schlingenförmig ineinandergreifenden Maschen gebildet wird, wobei das Drahtgestrick-Formteil zur besseren Eingießbarkeit gebeizt wird. Für eine im wesentlichen vollständige Infiltration durch den Leichtmetallwerkstoff wird vorzugsweise ein Drahtgestrick-Formteil mit einer Maschenteilung von 2 - 30 mm und mit einer Maschenlänge von 1,5 - 15 mm verwendet.Which corresponds to the size of the sound-emitting surface of the respective die-cast part customized wire texture is preferably as a knitted fabric from a wire made of a highly damping nickel material with a purity of at least 99% formed, the knitted from a round or flat wire from 0.05 - 0.6 mm diameter is chosen in terms of its density such that a porosity of the wire mesh for an essentially complete infiltration through the aluminum alloy is specified. Particularly high damping is achieved that the wire texture as a pressed molded part from multi-layer wire knitted webs is formed with interlocking meshes, the Wire knit molding is pickled for better pourability. For one essentially complete infiltration through the light metal material is preferred a wire knit molding with a mesh pitch of 2 - 30 mm and with one Mesh length of 1.5 - 15 mm used.
Ein Druckgußteil mit einer Gießeinlage aus einem Nickel-Drahtgestrick ergibt gegenüber einem Druckgußteil aus einer vollwandigen Alu-Legierung eine mehrfache Eigendämpfung. Ein Druckgußteil mit der erfindungsgemäß erzielten Eigendämpfung wirkt vorteilhaft bei Frequenzen, wie sie insbesondere bei Antriebsaggregaten von Kraftfahrzeugen auftreten.A die-cast part with a casting insert made of a nickel wire knit results in opposite a die-cast part made of a solid aluminum alloy multiple Self-damping. A die-cast part with the inherent damping achieved according to the invention has an advantageous effect at frequencies such as those found in drive units of motor vehicles occur.
Anstelle einer Draht-Textur aus einem Nickel-Werkstoff kann auch eine Draht-Textur als ein Gestrick aus einem Draht aus einem hochdämpfenden ferritischen FeCrAl 20 5-Stahl gebildet werden, vorzugsweise ebenfalls als gepreßtes und gebeiztes Drahtgestrick-Formteil. Weiter kann eine als Gießeinlage dienende Draht-Textur aus Drähten von beiden Werkstoffen gebildet sein.Instead of a wire texture made of a nickel material, a wire texture can also be used as a knitted fabric made of a wire made of a highly damping ferritic FeCrAl 20 5 steel are formed, preferably also as pressed and pickled Wire knit molding. A wire texture serving as a casting insert can also be used be formed from wires of both materials.
Schließlich kann die als Gießeinlage gestaltete Draht-Textur auch einer gewebeartig geordneten Struktur und/oder aus einer mattenartigen, ungeordneten Struktur gebildet werden derart, daß eine Porosität für eine im wesentlichen vollständige Infiltration durch die jeweilige Leichtmetall-Matrix erzielt wird.Finally, the wire texture designed as a casting insert can also be a fabric-like one ordered structure and / or from a mat-like, disordered structure be formed such that a porosity for substantially complete infiltration is achieved by the respective light metal matrix.
Das erfindungsgemäße Verfahren bietet neben der vorteilhaft schalldämpfenden Wirkung den weiteren Vorteil, daß durch die Verwendung von metallischen Drahtgestricken der hochdämpfende Leichtmetallwerkstoff problemlos und vollständig rezyklierbar ist.The method according to the invention offers, in addition to the advantageously sound-absorbing Effect the further advantage that through the use of metallic wire mesh the highly damping light metal material easily and completely is recyclable.
Claims (8)
dadurch gekennzeichnet,
characterized,
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19737601 | 1997-08-28 | ||
| DE19737601A DE19737601A1 (en) | 1997-08-28 | 1997-08-28 | Process for increasing the damping of a cast component made of a light metal material |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0902095A2 true EP0902095A2 (en) | 1999-03-17 |
| EP0902095A3 EP0902095A3 (en) | 1999-06-23 |
| EP0902095B1 EP0902095B1 (en) | 2004-04-21 |
Family
ID=7840508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98109036A Expired - Lifetime EP0902095B1 (en) | 1997-08-28 | 1998-05-18 | A light metal cast part with insert to improve the damping capacity characteristics |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0902095B1 (en) |
| DE (2) | DE19737601A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19918485C1 (en) * | 1999-04-23 | 2000-12-28 | Harald Uhlig Stahldraht Gmbh | Composite material, in particular in the form of a sheet, and process for its production |
| DE102004047850A1 (en) * | 2004-09-29 | 2006-04-06 | Georg Fischer Gmbh & Co.Kg | High strength automotive metal casting has inner zone incorporating strengthening element |
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| DE2118848A1 (en) * | 1971-04-19 | 1972-11-02 | Maschinenfabrik Augsburg-Nürnberg AG, 8000 München | Method and device for producing a rotationally symmetrical composite body |
| EP0338783A2 (en) * | 1988-04-19 | 1989-10-25 | Ube Industries, Ltd. | Fiber-reinforced metal composite |
| US5523171A (en) * | 1993-12-20 | 1996-06-04 | Hyundai Motor Company | Reinforced material for an automobile connecting rod |
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| DE286701C (en) * | ||||
| DE243704C (en) * | ||||
| DE1134481B (en) * | 1955-01-26 | 1962-08-09 | Marshall G Whitfield | Process for the production of cast light metal pistons with reinforcement on the piston ring groove |
| US3098723A (en) * | 1960-01-18 | 1963-07-23 | Rand Corp | Novel structural composite material |
| US3359615A (en) * | 1963-03-06 | 1967-12-26 | Nat Lead Co | Method of making a die cast cylinder for internal combustion engines |
| JPS5260222A (en) * | 1975-09-30 | 1977-05-18 | Honda Motor Co Ltd | Method of manufacturing fibre reinforced composite |
| DE2803763A1 (en) * | 1978-01-28 | 1979-08-02 | Willi Eberbach Kg Metallgiesse | Reinforced non-ferrous castings - are produced using steel strip or wire etc. secured in mould or die by spacers |
| ZA811792B (en) * | 1980-03-21 | 1982-10-27 | Dana Corp | Method of bonding piston ring insert |
| DE3807347A1 (en) * | 1988-03-05 | 1989-09-14 | Werner Schatz | Shaped body consisting of a plurality of metal layers and method for its production |
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1997
- 1997-08-28 DE DE19737601A patent/DE19737601A1/en not_active Ceased
-
1998
- 1998-05-18 EP EP98109036A patent/EP0902095B1/en not_active Expired - Lifetime
- 1998-05-18 DE DE59811223T patent/DE59811223D1/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2118848A1 (en) * | 1971-04-19 | 1972-11-02 | Maschinenfabrik Augsburg-Nürnberg AG, 8000 München | Method and device for producing a rotationally symmetrical composite body |
| EP0338783A2 (en) * | 1988-04-19 | 1989-10-25 | Ube Industries, Ltd. | Fiber-reinforced metal composite |
| US5523171A (en) * | 1993-12-20 | 1996-06-04 | Hyundai Motor Company | Reinforced material for an automobile connecting rod |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19918485C1 (en) * | 1999-04-23 | 2000-12-28 | Harald Uhlig Stahldraht Gmbh | Composite material, in particular in the form of a sheet, and process for its production |
| DE102004047850A1 (en) * | 2004-09-29 | 2006-04-06 | Georg Fischer Gmbh & Co.Kg | High strength automotive metal casting has inner zone incorporating strengthening element |
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| Publication number | Publication date |
|---|---|
| DE19737601A1 (en) | 1999-03-04 |
| EP0902095A3 (en) | 1999-06-23 |
| EP0902095B1 (en) | 2004-04-21 |
| DE59811223D1 (en) | 2004-05-27 |
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