EP0119365B1 - Method of producing pieces of aluminium or aluminium alloy - Google Patents

Method of producing pieces of aluminium or aluminium alloy Download PDF

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Publication number
EP0119365B1
EP0119365B1 EP19830420043 EP83420043A EP0119365B1 EP 0119365 B1 EP0119365 B1 EP 0119365B1 EP 19830420043 EP19830420043 EP 19830420043 EP 83420043 A EP83420043 A EP 83420043A EP 0119365 B1 EP0119365 B1 EP 0119365B1
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EP
European Patent Office
Prior art keywords
chilling
moulds
piece
die
aluminium
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
Application number
EP19830420043
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German (de)
French (fr)
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EP0119365A1 (en
Inventor
Thomas Di Serio
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE1983420043 priority Critical patent/DE119365T1/en
Priority to DE8383420043T priority patent/DE3373281D1/en
Priority to EP19830420043 priority patent/EP0119365B1/en
Publication of EP0119365A1 publication Critical patent/EP0119365A1/en
Application granted granted Critical
Publication of EP0119365B1 publication Critical patent/EP0119365B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/002—Hybrid process, e.g. forging following casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
    • B22D27/11—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of mechanical pressing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
    • B22D31/002—Cleaning, working on castings

Definitions

  • the present invention relates to a method for manufacturing parts from aluminum, or from a cast aluminum alloy, according to the preamble of claim 1.
  • One of the known methods consists in manufacturing them by stamping, or by forging, which has the advantage of giving them a metallographic structure at heart corresponding to high mechanical performance.
  • Another known method consists in manufacturing the parts by molding with lost wax, in particular when it is desired to produce parts having precise geometric dimensions, and a surface finish of an excellent finish.
  • the object of the present invention is to avoid these drawbacks, by using an improved casting process, making it possible to manufacture pieces of aluminum or light alloy having better performances than those obtained by a conventional process.
  • the method according to the invention consists in casting aluminum or an aluminum alloy, in a mold, to obtain a metal part as soon as the solidification is finished sufficiently rigid, and it is characterized in that immediately after the pouring, the still hot part is removed from the mold, and it is placed between two shells of a matrix defining an imprint of dimensions slightly smaller than those of the mold, the two shells of the matrix then being strongly pressed against each other, to exert on the casting, put between the shells, a combined effect of pressing to the core, and of surface dressing.
  • the core temperature of the molded part is still between 400 ° and 500 ° centigrade degrees at the time of pressing between the shells of the matrix.
  • the two shells of the matrix are mounted in a press, for example an eccentric press, which subjects the part to a percussion or to a pressing or a pressing between the two shells of the matrix.
  • the part is molded by tilting at ninety degrees, or one hundred and eighty degrees, in a shell, which makes it possible to obtain a quiet filling, without oxidation. , or bubbling.
  • An aluminum alloy is treated with copper, of the type known under the trade name AU5GT Y34.
  • a silicon aluminum alloy is used, of the type known under the trade name AS7G 06 Y33.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Description

La présente invention est relative à un procédé, pour fabriquer des pièces en aluminium, ou en alliage d'aluminium coulé, selon la préambule de la revendication 1.The present invention relates to a method for manufacturing parts from aluminum, or from a cast aluminum alloy, according to the preamble of claim 1.

On connaît divers procédés pour fabriquer des pièces en aluminium, ou en alliage léger. L'un des procédés connus consiste à les fabriquer par matriçage, ou par forgeage, ce qui présente l'avantage de leur conférer à coeur une structure métallographique correspondant à des performances mécaniques élevées.Various processes are known for manufacturing aluminum or light alloy parts. One of the known methods consists in manufacturing them by stamping, or by forging, which has the advantage of giving them a metallographic structure at heart corresponding to high mechanical performance.

Un autre procédé connu consiste à fabriquer les pièces par moulage à la cire perdue, notamment lorsqu'on veut réaliser des pièces possédant des dimensions géométriques précises, et un état de surface d'une excellente finition.Another known method consists in manufacturing the parts by molding with lost wax, in particular when it is desired to produce parts having precise geometric dimensions, and a surface finish of an excellent finish.

Ces procédés connus présentent tous l'inconvénient de nécessiter un outillage compliqué, et de conduire à un prix de revient élevé.These known methods all have the drawback of requiring complicated tools, and leading to a high cost price.

Un autre procédé connu, économiquement très avantageux, consiste à fabriquer les pièces par coulée. Malheureusement, la qualité des pièces coulées selon les procédés traditionnels est inférieure aux qualités obtenues par les procédés précédents en ce qui concerne la résistance mécanique et le respect des tolérances géométriques.Another known process, economically very advantageous, consists in manufacturing the parts by casting. Unfortunately, the quality of the castings according to traditional methods is inferior to the qualities obtained by the previous methods with regard to mechanical strength and compliance with geometric tolerances.

La présente invention a pour but d'éviter ces inconvénients, en utilisant un procédé de coulée perfectionnée, permettant de fabriquer des pièces d'aluminium ou d'alliage léger possédant des performances meilleures que celles obtenues par un procédé classique.The object of the present invention is to avoid these drawbacks, by using an improved casting process, making it possible to manufacture pieces of aluminum or light alloy having better performances than those obtained by a conventional process.

Le procédé selon l'invention consiste à couler de l'aluminium ou un alliage d'aluminium, dans un moule, pour obtenir, une pièce métallique dès que la solidification est terminée suffisamment rigide, et il est caractérisé en ce qu'aussitôt après la coulée, on démoule la pièce encore chaude, et on la place entre deux coquilles d'une matrice définissant une empreinte de dimensions légèrement inférieures à celles du moule, les deux coquilles de la matrice étant alors fortement pressées l'une contre l'autre, pour exercer sur la pièce coulée, mise entre les coquilles, un effet combiné de pressage à coeur, et de corroyage superficiel.The method according to the invention consists in casting aluminum or an aluminum alloy, in a mold, to obtain a metal part as soon as the solidification is finished sufficiently rigid, and it is characterized in that immediately after the pouring, the still hot part is removed from the mold, and it is placed between two shells of a matrix defining an imprint of dimensions slightly smaller than those of the mold, the two shells of the matrix then being strongly pressed against each other, to exert on the casting, put between the shells, a combined effect of pressing to the core, and of surface dressing.

Suivant une autre caractéristique de l'invention, la température à coeur de la pièce démoulée est encore comprise entre 400° et 500° degrés centrigrades au moment du pressage entre les coquilles de la matrice.According to another characteristic of the invention, the core temperature of the molded part is still between 400 ° and 500 ° centigrade degrees at the time of pressing between the shells of the matrix.

Suivant une autre caractéristique de l'invention, les deux coquilles de la matrice sont montées dans une presse, par exemple à excentrique, qui soumet la pièce à une percussion ou à un pressage ou à un pressage entre les deux coquilles de la matrice.According to another characteristic of the invention, the two shells of the matrix are mounted in a press, for example an eccentric press, which subjects the part to a percussion or to a pressing or a pressing between the two shells of the matrix.

Suivant une caractéristique supplémentaire de l'invention, le moulage de la pièce s'effectue par basculement à quatre-vingt-dix degrés, ou cent-quatre vingts degrés, dans une coquille, ce qui permet d'obtenir un remplissage tranquille, sans oxydation, ni bouillonnement.According to an additional characteristic of the invention, the part is molded by tilting at ninety degrees, or one hundred and eighty degrees, in a shell, which makes it possible to obtain a quiet filling, without oxidation. , or bubbling.

A titre d'exemple non limitatif, on va maintenant décrire quelques modes d'utilisation possibles du procédé selon l'invention.By way of nonlimiting example, we will now describe some possible modes of use of the method according to the invention.

Exemple numéro 1:Example number 1:

On traite un alliage d'aluminium au cuivre, du type connu sous la dénomination commerciale AU5GT Y34.An aluminum alloy is treated with copper, of the type known under the trade name AU5GT Y34.

Pour une même pièce, réalisée en cet alliage, on a obtenu le résultat suivant:

  • - limite d'allongment élastique: 8 à 11 % pour une pièce coulée en coquille, selon le procédé traditionnel. 16 à 20% pour une pièce coulée et matricée selon l'invention;
  • - résistance à la rupture: de 340 à 360 MPA (mégapascals) pour une pièce obtenue par coulée classique en coquille. 400 à 450 MPA, pour une pièce fabriquée selon l'invention.
  • - essai de fatigue: le temps de tenue des pièces obtenu par le procédé selon l'invention est sensiblement le double de celui des pièces obtenues par moulage classique.
For the same part, made of this alloy, the following result was obtained:
  • - elastic elongation limit: 8 to 11% for a part cast in a shell, according to the traditional process. 16 to 20% for a cast and stamped part according to the invention;
  • - breaking strength: from 340 to 360 MPa (megapascals) for a part obtained by conventional shell casting. 400 to 450 MPa, for a part manufactured according to the invention.
  • - Fatigue test: the holding time of the parts obtained by the method according to the invention is substantially double that of the parts obtained by conventional molding.

Exemple numéro 2:Example number 2:

On utilise, cette fois, un alliage d'aluminium au silicium, de type connu sous la dénomination commerciale AS7G 06 Y33.This time, a silicon aluminum alloy is used, of the type known under the trade name AS7G 06 Y33.

Le résultat obtenu est le suivant:

  • - limite d'allongement élastique: 4 à 6% pour une pièce coulée par gravité en coquille selon le procédé traditionnel; 5 à 9% pour une pièce moulée sous pression suivant un autre procédé connu; 9 à 14% pour une pièce coulée et pressée selon l'invention;
  • - résistance à la rupture: de 290 à 320 MPA, pour une pièce coulée en coquille; de 250 à 300 MPA pour une pièce moumée sous pression; de 320 à 360 MPA, pour une pièce coulée et pressée selon l'invention;
  • - essai de fatigue: le temps de tenue des pièces est sensiblement le double de celui des pièces obtenues par des procédés connus;
  • - coût relatif des outillages: la référence de prix 100 affectée à l'outillage pour la coulée en coquille, le moulage sous pression de type connu correspond à un coût de 300, alors que le, pour le procédé coulé-pressé selon l'invention, le coût de l'outillage est seulement de 150. On constate donc que, parmi ces trois procédés, c'est le procédé objet de l'invention qui conduit à l'amortissement d'outillage le plus rapide.
The result is as follows:
  • - elastic elongation limit: 4 to 6% for a part cast by gravity in a shell according to the traditional process; 5 to 9% for a part molded under pressure according to another known method; 9 to 14% for a cast and pressed part according to the invention;
  • - breaking strength: from 290 to 320 MPa, for a shell molded part; from 250 to 300 MPa for a pressure-molded part; from 320 to 360 MPA, for a cast and pressed part according to the invention;
  • - fatigue test: the holding time of the parts is substantially double that of the parts obtained by known methods;
  • - relative cost of tooling: the price reference 100 assigned to the tooling for shell casting, pressure molding of known type corresponds to a cost of 300, while that for the press-pressed process according to the invention , the cost of the tool is only 150. It can therefore be seen that, among these three methods, it is the method which is the subject of the invention which leads to the quickest amortization of the tool.

Exemple numéro 3:Example number 3:

Dans le cas particulier de la fabrication d'une pièce constituée par une manivelle d'un pédalier de bicyclette, le tableau ci-dessous permet de comparer les résultats des essais mécaniques sur des pièces fabriquées par le procédé connu de coulée par gravite (colonne de gauche) ou par le procédé coulé-pressé selon l'invention:

Figure imgb0001
In the particular case of the manufacture of a part constituted by a crank of a bicycle crankset, the table below makes it possible to compare the results of the mechanical tests on parts manufactured by the known process of casting by gravity (column of left) or by the press-cast process according to the invention:
Figure imgb0001

Claims (4)

1. A method consisting to cast aluminium or an aluminium alloy in a mould to obtain a piece of metal as soon as the solidification is completed which is sufficiently rigid, characterized in that the piece still in hot condition is stripped immediately after the casting and placed between two chilling moulds of a die defining an imprint the size of which is slightly smaller than the size of the mould, the two chilling moulds of the die being then tightly pulled against one another in order to exert on the cast piece placed between the chilling moulds a combined action of core pressing and of superficial hammering.
2. A method as claimed in Claim 1, characterized in that the core temperature of the stripped piece is still comprised between 400 and 500 degrees centrigrade at the time of the pressing between the chilling moulds of the die.
3. A method as claimed in any one of the foregoing Claims, characterized in that the two chilling moulds of the die are mounted in a press by means of which the piece is subjected to a percussion or to a pressing between the two chilling moulds of the die.
4. A method as claimed in any one of the foregoing Claims, characterized in that the moulding of the piece is performed by rocking at 90 degrees, or at 180 degrees, in a chilling mould, enabling to obtain a quiet filling, without oxidation or bubbling, in accordance with the quality of the pieces to be made.
EP19830420043 1983-03-14 1983-03-14 Method of producing pieces of aluminium or aluminium alloy Expired EP0119365B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE1983420043 DE119365T1 (en) 1983-03-14 1983-03-14 METHOD AND DEVICE FOR PRODUCING PIECES FROM ALUMINUM OR ALUMINUM ALLOY AND PIECES OBTAINED IN THIS WAY.
DE8383420043T DE3373281D1 (en) 1983-03-14 1983-03-14 Method of producing pieces of aluminium or aluminium alloy
EP19830420043 EP0119365B1 (en) 1983-03-14 1983-03-14 Method of producing pieces of aluminium or aluminium alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19830420043 EP0119365B1 (en) 1983-03-14 1983-03-14 Method of producing pieces of aluminium or aluminium alloy

Publications (2)

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EP0119365A1 EP0119365A1 (en) 1984-09-26
EP0119365B1 true EP0119365B1 (en) 1987-09-02

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
DE102006036369B4 (en) * 2006-08-02 2009-04-09 Kahn, Friedhelm, Prof. Dr. Ing. Method and device for producing components by integrated melting, casting and forming
CN104080558A (en) * 2011-12-29 2014-10-01 圣让工业公司 Method of dressing a forge die in the implementation of parts obtained by two successive operations of foundry casting followed by forging

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EP0816042A1 (en) * 1996-07-03 1998-01-07 GUIDO BAGGIOLI S.N.C. DI BAGGIOLI GIUSEPPE & PELLEGRINI CLEMENTINA A process for manufacturing alloy castings
DE19638506A1 (en) * 1996-09-20 1998-03-26 Leybold Vakuum Gmbh Procedure for examining a plurality of similar test objects for leaks and leak detectors suitable for carrying out this procedure
WO1999029454A1 (en) * 1997-12-09 1999-06-17 Vitromatic Comercial, S.A. De C.V. Process for fabricating aluminium valves for burners of domestic gas heaters
FR2778125B1 (en) * 1998-05-04 2000-07-07 Serio Emile Di PROCESS FOR MANUFACTURING PARTS OF CAST ALLOYS, PARTICULARLY ALUMINUM
FR2803232B1 (en) * 1999-12-29 2002-04-26 Serio Emile Di IMPROVED PROCESS FOR MANUFACTURING LIGHT ALLOY PARTS
FR2816858B1 (en) * 2000-11-17 2003-07-11 Process Conception Ing Sa METHOD FOR MANUFACTURING PARTS OF METAL ALLOYS WITH COOLING BEFORE PRESSING
FR2818565B1 (en) * 2000-12-27 2003-07-04 Serio Emile Di PROCESS FOR THE MANUFACTURE OF MOLDED PARTS THEN FORGED COMPRISING ONE OR TWO RECESSES AND INSTALLATION FOR IMPLEMENTING SAME
GB2386576B (en) * 2002-03-06 2004-02-25 Adcock Tech Ltd A method of manufacture of a metallic component, apparatus when used in the method and a method of finishing a metallic component
FR2840242B1 (en) * 2002-05-31 2005-01-07 Saint Jean Ind FORGED CASTLES WITHOUT TRACES OF EJECTORS
US7216691B2 (en) 2002-07-09 2007-05-15 Alotech Ltd. Llc Mold-removal casting method and apparatus
US7165600B2 (en) 2002-09-11 2007-01-23 Alotech Ltd. Llc Chemically bonded aggregate mold
US7121318B2 (en) 2002-09-20 2006-10-17 Alotech Ltd. Llc Lost pattern mold removal casting method and apparatus
US7147031B2 (en) 2002-09-20 2006-12-12 Alotech Ltd. Llc Lost pattern mold removal casting method and apparatus
EP2164999A1 (en) 2007-07-09 2010-03-24 Bharat Forge Aluminiumtechnik GMBH & CO. KG Casting-forging of wrought alloys
DE102009035702A1 (en) * 2009-07-30 2011-02-03 Benteler Automobiltechnik Gmbh Chassis component for a motor vehicle and method of manufacture
DE102009054315A1 (en) * 2009-11-24 2011-05-26 Benteler Automobiltechnik Gmbh Method for producing a motor vehicle component
FR2958193B1 (en) 2010-04-06 2012-06-29 Saint Jean Ind PROCESS FOR MANUFACTURING LIGHT ALLOY FORGED PARTS INCORPORATING FULL OR DRAWN THICKNESS SECTIONS
FR2969516B1 (en) 2010-12-23 2013-08-16 Saint Jean Ind PROCESS FOR THE PRODUCTION OF SALT CORE BY ISOSTATIC COMPACTION UILIZABLE IN FOUNDRY OR FOUNDRY-FORGING
FR2981605B1 (en) * 2011-10-25 2013-11-01 Saint Jean Ind METHOD FOR MANUFACTURING A HYBRID WHEEL IN TWO LIGHT ALLOY PARTS ESPECIALLY ALUMINUM
DE102012100458A1 (en) * 2012-01-20 2013-07-25 Martinrea Honsel Germany Gmbh Method for producing a light metal component provided with at least one cavity
FR2993806B1 (en) 2012-07-26 2015-02-13 Saint Jean Ind PROCESS FOR MANUFACTURING STRUCTURE PARTS OF LIGHT ALLOY AND PARTS THUS OBTAINED FOR OPTIMIZING THE MASS / PERFORMANCE RATIO
FR3015316B1 (en) 2013-12-23 2017-05-19 Saint Jean Ind PROCESS FOR MANUFACTURING TITANIUM PIECES FROM A FOUNDRY OPERATION FOLLOWED BY A FORGING OPERATION OF SAID PARTS
FR3020291B1 (en) 2014-04-29 2017-04-21 Saint Jean Ind METHOD FOR MANUFACTURING METAL OR METAL MATRIX COMPOSITE ARTICLES MADE OF ADDITIVE MANUFACTURING FOLLOWED BY A FORGING OPERATION OF SAID PARTS
CN105268884B (en) * 2014-07-21 2017-04-19 中国科学院金属研究所 Method for forging superhigh-temperature soft core of steel ingot
FR3030370B1 (en) 2014-12-17 2018-04-20 Saint Jean Industries METHOD FOR MANUFACTURING A HYBRID WHEEL IN TWO LIGHT ALLOY PARTS ESPECIALLY ALUMINUM INCLUDING EVIDENCE IN ONE OF THE PNEUMATIC HEEL SEATS
FR3032204B1 (en) * 2015-01-29 2019-08-09 Saint Jean Industries ALUMINUM LOW SILICON ALLOY PIECE
FR3034332A1 (en) * 2015-04-01 2016-10-07 Saint Jean Ind PROCESS FOR SANDING CARAPLE MOLDING FOR THE PRODUCTION OF A PART IN THE AUTOMOTIVE AND AERONAUTICS FIELD
FR3051697B1 (en) 2016-05-27 2018-05-11 Saint Jean Industries PROCESS FOR MANUFACTURING A WORK PART AT LEAST PARTIALLY OF A METAL ALLOY, AND METHOD OF OPTIMIZATION
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Cited By (3)

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Publication number Priority date Publication date Assignee Title
DE102006036369B4 (en) * 2006-08-02 2009-04-09 Kahn, Friedhelm, Prof. Dr. Ing. Method and device for producing components by integrated melting, casting and forming
CN104080558A (en) * 2011-12-29 2014-10-01 圣让工业公司 Method of dressing a forge die in the implementation of parts obtained by two successive operations of foundry casting followed by forging
CN104080558B (en) * 2011-12-29 2016-10-05 圣让工业公司 Performing by casting the method in the parts that two continuous operations forged subsequently obtain, dressing being carried out to forging die

Also Published As

Publication number Publication date
DE119365T1 (en) 1985-03-07
DE3373281D1 (en) 1987-10-08
EP0119365A1 (en) 1984-09-26

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