EP0710515A1 - Verfahren zur thixotropischen Verformung von Rädern aus Rheocast Metallegierungen - Google Patents

Verfahren zur thixotropischen Verformung von Rädern aus Rheocast Metallegierungen Download PDF

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Publication number
EP0710515A1
EP0710515A1 EP95830240A EP95830240A EP0710515A1 EP 0710515 A1 EP0710515 A1 EP 0710515A1 EP 95830240 A EP95830240 A EP 95830240A EP 95830240 A EP95830240 A EP 95830240A EP 0710515 A1 EP0710515 A1 EP 0710515A1
Authority
EP
European Patent Office
Prior art keywords
cavity
die
sections
wheel
ingot
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
EP95830240A
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English (en)
French (fr)
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EP0710515B1 (de
Inventor
Valter Baldi
Gianni Benni
Giorgio Muneratti
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.)
Reynolds Wheels International Ltd
Original Assignee
Reynolds Wheels International Ltd
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 Reynolds Wheels International Ltd filed Critical Reynolds Wheels International Ltd
Priority to US08/549,094 priority Critical patent/US5900080A/en
Priority to CA002161923A priority patent/CA2161923A1/en
Publication of EP0710515A1 publication Critical patent/EP0710515A1/de
Application granted granted Critical
Publication of EP0710515B1 publication Critical patent/EP0710515B1/de
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
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/005—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of rolls, wheels or the like
    • 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
    • B21J5/004—Thixotropic process, i.e. forging at semi-solid state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/38—Making machine elements wheels; discs rims; tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/007—Semi-solid pressure die casting

Definitions

  • the present invention relates to a thixotropic forming process suitable for wheels fashioned from rheocast metal alloy in the semisolid state, and in particular for the manufacture of aluminium alloy road wheels fitted ultimately with pneumatic tyres.
  • the shaping processes employed conventionally in the manufacture of road wheels for pneumatic tyres are essentially those of forging, and casting in permanent moulds, both of which well known in the wider field of mechanical engineering.
  • Forging is the familiar process by which a metal alloy can be shaped in the solid state.
  • this is a facility which allows the realization of products with superior mechanical properties, but which at the same time gives rise to a number of drawbacks, namely, the need to use alloys suitable for plastic working, the impossibility of producing articles with geometrically complex shapes, and the fact that the end product will be arrived at only after implementing a series of consecutive steps, especially a product characterized by significant variations in thickness such as are evident in the typical geometry of a road wheel.
  • the high cost of the forging process represents a further drawback.
  • the lower mechanical quality of the cast wheel is attributable to the structural characteristics of casting alloys, as well as to the porosity and discontinuity which are generated within the fabric of the wheel and derive from the particular type of casting process.
  • both of the processes mentioned above are characterized in that the forged or cast piece requires generous allowances of material, dictating the need for extensive additional machining steps before the piece can be considered an end product.
  • the end product is obtained from an ingot or billet exhibiting a particular structure that appears physically homogeneous on macroscopic inspection, but when viewed microscopically appears as a plurality of solid globular granules immersed in a liquid phase.
  • the ingot can take on different characteristics according to the percentages, by weight, of the solid and liquid fractions: in the case of a semisolid, the material can behave in the manner of a solid, for example when conveyed from a heating station to a work station or thixotropic injection forming station, but in the manner of a liquid when injected under pressure.
  • the object of the present invention is to overcome the drawbacks of each such method while combining the advantages.
  • the process disclosed can be applied in manufacturing metal alloy wheels even of complex geometry, including slender sections and much broader sections alternating substantially in unlimited manner, and thus incorporates a feature characteristic of the permanent mould type casting techniques mentioned above.
  • the invention relates to a process for the manufacture of wheels in rheocast metal alloy, typically road wheels fitted subsequently with pneumatic tyres, which utilizes billets of rheocast aluminium alloy obtained in conventional manner by recasting from pigs of raw stock having a dendritic structure.
  • the liquid alloy is directed through a filter and into a casting device equipped with an agitator and a chill, whereupon the cooling material solidifies and is formed into billets exhibiting a rheocast microstructure.
  • the billets are then divided into ingots 1 of predetermined weight, which undergo controlled heating at a temperature within the solidification range of the alloy and are brought to a thixotropic semisolid state characterized by a microstructure (indicated in fig 1a) that comprises a liquid phase 14, resulting from the components of the alloy having a lower melting point, and a mass of substantially rounded solid granules 15 immersed in the liquid.
  • a microstructure indicated in fig 1a
  • the ingots 1 are uplifted in this same semisolid state, for example by automatic handling means 23 (as indicated in fig 2) and introduced singly into the injection chamber 3 of a thixotropic injection forming machine 4 (figs 1, 2 and 3) operating in conjunction with a closed die or mould 5 by which the wheel 2 is effectively given its shape.
  • automatic handling means 23 as indicated in fig 2
  • figs 1, 2 and 3 operating in conjunction with a closed die or mould 5 by which the wheel 2 is effectively given its shape.
  • the die 5 affords a cavity 7 of shape substantially matching that of the wheel 2 and is provided with thermoregulating circuits 6 carrying a hot fluid, oil for example, supplied by a unit not shown in the drawings.
  • the injection chamber accommodates a ram 22 that can be reciprocated at a variable rate by the thixotropic injection forming machine 4 (described more fully in due course).
  • thermoregulating circuits 6, which run adjacent to the die cavity 7, are mutually independent and arranged in such a way that sections A' of greater width exhibited by the cavity 7 can be cooled, or more exactly heated to a lower temperature, whilst sections B' of lesser width are heated to higher temperature.
  • width is used to indicate the transverse dimensions of the space afforded by the relative passage of the cavity 7.
  • the operation of filling the die 5 with the alloy in its semisolid state is a particularly critical one.
  • a complete fill is in fact made possible only by ensuring that the liquid phase of the semisolid alloy (which in any event is proportionally less than the solid) does not solidify within the sections B' of lesser width and thus block the passage afforded to the semisolid material entering the cavity 7, forced in by the ram 22, before the part of the die 5 beyond the blockage has been filled to capacity.
  • it is essential that the interface between the solidifying alloy and the liquid phase of the injected semisolid mass should progress regularly, advancing internally of the die cavity 7 from the peripheral parts of the wheel 2 back to the areas nearer the injection chamber 3.
  • wheels for pneumatic tyres are manufactured from rheocast metal alloy employing a thixotropic forming process in which use is made of ingots 1 already preheated to the point of bringing the alloy to the uniform semisolid state described above.
  • sections A of greater thickness exhibited by the typical wheel 2 consist in a central disc 9 incorporating a hub 9a, and a plurality of spoke ribs 10 radiating from the hub in alternation with respective voids 11.
  • sections B of lesser thickness consisting in a lateral cylindrical surface 12 or rim composed of an inner portion 13 and an outer portion 16. The two portions are compassed in turn by an inside flange 17 and an outside flange 18.
  • the process comprises a step of injecting the metal alloy ingot 1, in the semisolid thixotropic state, into the cavity 7 of the die 5.
  • the width Zi at least of the narrower section B' of the cavity 7, which corresponds to the inner portion 13 of the rim 12, is greater than the width Zd that will determine the definitive or final shape of the inner portion 13. Accordingly, the thickness Si of this same portion 13 on completion of the injection step will be greater than the final thickness Sd to be obtained on completion of the process overall.
  • thermoregulating the die 5 is implemented by way of the relative circuits 6 which, to reiterate, are able to maintain a relatively higher temperature in the cavity 7 at the sections B' of lesser width and at the same time a relatively lower temperature at the sections A' of greater width.
  • the velocity at which the ingot 1 is forced into the die will be monitored and varied by monitoring and varying the linear velocity of the ram 22, and thus controlling the rate at which the front of metal alloy advances in the semisolid state internally of the cavity 7.
  • the injection rate is a function of the dissimilar flow passages afforded by the wider and narrower sections A' and B' of the cavity 7, and continues to be controlled until the die has filled, thereby allowing a faster advance of the front of semisolid alloy through the wider areas A' of the cavity 7 and a slower advance through the narrower areas B'.
  • the material is subjected to an additional pressure force, applied through the ram 22 by the thixotropic injection forming machine 4, compounding and therefore much greater than the injection pressure force applied previously.
  • Solidification is followed by the steps of removing the wheel 2 from the die 5 and then hot-drawing the inner portion 13 of the rim 12 by compression.
  • the purpose of the drawing operation is to reduce the inner portion 13 from the initial injection forming thickness Si, indicated in fig 1c by phantom lines, down to the definitive or final thickness Sd.
  • this step has the effect of achieving increased mechanical strength, at least across the inner portion 13 of the rim 12, and of compacting the metal alloy still further so as to avoid the eventuality, should the finishing steps of manufacture involve the removal of material by machining, that interstices could then appear in the structure and jeopardize the airtightness of the wheel when fitted ultimately with a pneumatic tyre.
  • both of the narrow sections B' exhibited by the die cavity 7, which generate the lateral surface 12 of the wheel 2 are proportioned to a width Zi greater than the definitive or final width Zd, as described already with reference to fig 1c.
  • the selfsame thixotropic forming process is implemented using a closed die 5 with a cavity 7 of geometry, sectional profile and dimensions identical to the final geometry, sectional profile and dimensions of the wheel 2. In this instance, no drawing operation is performed on the wheel 2 once removed from the die 5.
  • the process allows for the application of a heat treatment whereby the ingots 1, initially in the solid state, are immersed in convectional flows of hot air for a period of time and at a temperature sufficient to bring the alloy to the thixotropic semisolid state.
  • the step of injecting the semisolid ingots 1 is implemented generally at low velocity so that laminar flow can be induced in the thixotropic alloy; in addition, the velocity is varied cyclically so as to ensure a uniform progression of the solidification interface aforementioned.
  • the ingot 1 is advanced by the ram 22 of the injection forming machine 4 from a first position X of introduction into the injection chamber 3, to a second position Y from which the material is forced into the die 5.
  • the ingot 1 In passing from position X to position Y, the ingot 1 is forced at minimal velocity so that air will not be trapped between the ingot 1 and the wall 21 of the chamber 3 and allowed thus to find its way into the die cavity 7 at the next injection.
  • Solidification of the liquid phase in the semisolid alloy represents a critical aspect of the process disclosed, as already explained. Nonetheless, as long the rheocast alloy introduced into the die cavity 7 has a solid content of some 50 or 60%, this ensures advantageously that contractions and thermal shocks will be of a limited order.
  • the ingots 1 utilized are of a predetermined weight. More exactly, the weight of the ingot is selected to ensure a quantity of the alloy greater than can be contained within the die cavity 7, so that on completion of the step in which the ingot 1 is injected into the cavity 7, a residual portion 8 of semisolid material is left to solidify externally of the die 5, between the die and the injection chamber 3 (see fig 3).
  • This deliberately generated residual portion 8 of the ingot is instrumental in achieving homogeneity and quality of the wheel. More exactly, the inlet of the die 5 presents a restricted section 25 to the ingot 1 passing from the injection chamber 3 to the cavity 7, of which the effect is to gather up the skin 20 of the ingot, physically and chemically distressed by the intense oxidizing action of the air especially on the liquid phase of the rheocast material, when forced from the injection chamber 3 (see fig 4).
  • the process includes a shearing step effected by a blade 19, which will be operated after the injection chamber 3 is distanced from the die 5.
  • a wheel of the type described above can be obtained substantially in a single operation, and, unlike other comparable cast alloy road wheels, betrays no problems of porosity thanks to the viscosity of the semisolid alloy, the variable rate of injection and the advantages of the subsequent hot-drawing step; the wheel described and illustrated also benefits from closer dimensional tolerances due to the fact that solid contractions, affecting only the liquid fraction of the semisolid alloy, are compensated by the application of high pressure forces within the solid-liquid interface, with the result that fewer machining operations are required.
  • the process disclosed might comprise the further step of heat treating the wheel 2 after its removal from the die 5, and after the step of hot-drawing the rim 12 by compression, if included. This would be a heat treatment designed to induce solid solution in the thixotropic metal alloy from which the wheel is fashioned.
  • the wheel 2 will be age hardened to the end of preventing precipitation in the alloy. Thereafter, the wheel can be machined to remove surface material from the rim 12, and more exactly, to remove the machining allowance left by the earlier compression hot-drawing step performed on the inner portion 13, and possibly on the outer portion 16, of the lateral surface 12.
  • a wheel produced by the process according to the present invention possesses the premium mechanical properties typical of the forged product, and is also superior in quality to the cast product, thus further improving the resistance to fatigue and the tenacity of the alloy road wheel, and enhancing its appearance.
  • a further characteristic of any wheel obtained by means of the process disclosed is the especially homogeneous structure of the material from which the wheel itself is fashioned.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Heat Treatment Of Steel (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Table Devices Or Equipment (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP95830240A 1994-11-07 1995-06-08 Verfahren zur thixotropischen Verformung von Felgen aus Rheocast Metallegierungen Expired - Lifetime EP0710515B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US08/549,094 US5900080A (en) 1994-11-07 1995-10-27 Thixotropic forming process for wheels fashioned in rheocast metal alloy and fitted with pneumatic tires
CA002161923A CA2161923A1 (en) 1994-11-07 1995-11-01 Thixotropic forming process for wheels fashioned in rheocast metal alloy and fitted with pneumatic tyres

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO940484A IT1274094B (it) 1994-11-07 1994-11-07 Procedimento di formatura tixotropica di cerchi per pneumatici in lega metallica reocolata.
ITBO940484 1994-11-07

Publications (2)

Publication Number Publication Date
EP0710515A1 true EP0710515A1 (de) 1996-05-08
EP0710515B1 EP0710515B1 (de) 1998-11-18

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Application Number Title Priority Date Filing Date
EP95830240A Expired - Lifetime EP0710515B1 (de) 1994-11-07 1995-06-08 Verfahren zur thixotropischen Verformung von Felgen aus Rheocast Metallegierungen

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EP (1) EP0710515B1 (de)
AT (1) ATE173419T1 (de)
DE (1) DE69506075T2 (de)
IT (1) IT1274094B (de)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0867246A1 (de) * 1997-03-27 1998-09-30 Mazda Motor Corporation Verfahren und Vorrichtung zum Spritzgiessen halbflüssiger Metalle
EP0875318A1 (de) * 1997-05-01 1998-11-04 Ykk Corporation Verfahren und Anlage zur Herstellung von Giesstücken aus amorpher Legierung durch Druckguss
EP0897768A1 (de) * 1997-08-22 1999-02-24 Bühler AG Giesskammer für eine Druckgiessmaschine und ein Verfahren zum Entfernen von Verunreinigungen
EP0940206A1 (de) * 1998-03-04 1999-09-08 Alusuisse Technology & Management AG Oxidabscheider
EP0968781A2 (de) * 1998-07-03 2000-01-05 Mazda Motor Corporation Verfahren und Vorrichtung zum Spritzgiessen halbflüssiger Metalle
FR2794669A1 (fr) 1999-06-08 2000-12-15 Michelin Soc Tech Procede de fabrication d'une piece metallique, telle qu'une partie de roue destinee au roulage d'un vehicule, et une telle roue
WO2000076696A1 (en) * 1999-06-09 2000-12-21 Georg Fischer Disa A/S Casting method and mould string
DE10003791A1 (de) * 2000-01-28 2001-08-09 Forschungsges Umformtechnik Verfahren zur Herstellung von Felgen
US6399017B1 (en) 2000-06-01 2002-06-04 Aemp Corporation Method and apparatus for containing and ejecting a thixotropic metal slurry
US6402367B1 (en) 2000-06-01 2002-06-11 Aemp Corporation Method and apparatus for magnetically stirring a thixotropic metal slurry
US6432160B1 (en) 2000-06-01 2002-08-13 Aemp Corporation Method and apparatus for making a thixotropic metal slurry
WO2003045609A2 (de) * 2001-11-28 2003-06-05 Bühler Druckguss AG Verfahren zur herstellung von druckgiessteilen und giesseinrichtung
US6611736B1 (en) 2000-07-01 2003-08-26 Aemp Corporation Equal order method for fluid flow simulation
US6796362B2 (en) 2000-06-01 2004-09-28 Brunswick Corporation Apparatus for producing a metallic slurry material for use in semi-solid forming of shaped parts
US6845809B1 (en) 1999-02-17 2005-01-25 Aemp Corporation Apparatus for and method of producing on-demand semi-solid material for castings
WO2005051570A1 (en) * 2003-11-26 2005-06-09 Price, James, Cairns Casting of metal artefacts
US7024342B1 (en) 2000-07-01 2006-04-04 Mercury Marine Thermal flow simulation for casting/molding processes
WO2007004241A1 (en) * 2005-07-05 2007-01-11 Aluminio Tecno Industriales Orinoco C.A. Process and plant for producing components made of thixotropic billets of an aluminium alloy for vehicules , and components obtained thereby
CN1308103C (zh) * 2000-11-29 2007-04-04 米凯林技术公司 制造金属元件如车轮部件的方法及由该方法制造的车轮
EP1970143A2 (de) 2007-03-15 2008-09-17 Bühler Druckguss AG Verfahren zur Herstellung von Druckgiessteilen und Giesseinrichtung
RU2443496C1 (ru) * 2010-07-22 2012-02-27 Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") Способ получения изделий с полостями тиксоштамповкой и закрытый штамп для его осуществления
RU2443494C1 (ru) * 2010-07-22 2012-02-27 Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") Штамп и способ изготовления корпуса буксы из цилиндрической заготовки с глобулярной структурой
CN105705271A (zh) * 2013-09-05 2016-06-22 通用汽车环球科技运作有限责任公司 生产高性能轴对称部件的方法和设备
RU2709079C2 (ru) * 2017-11-08 2019-12-13 Акционерное общество Акционерная холдинговая Компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (АО АХК "ВНИИМЕТМАШ") Способ изготовления поршня с упрочняющим нирезистовым кольцом методом твёрдожидкого формования
RU2724235C2 (ru) * 2018-07-10 2020-06-22 Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технологический университет "СТАНКИН" (ФГБОУ ВО "МГТУ "СТАНКИН") Способ формообразования тонкополотной поковки

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2026363A (en) * 1978-07-25 1980-02-06 Itt Process for shaping metal alloy products
US4579604A (en) * 1982-07-08 1986-04-01 Ni Industries, Inc. Method of spin forging a finished article
EP0379453A1 (de) * 1989-01-19 1990-07-25 Aluminium Pechiney Druckgiessverfahren zur Herstellung von metallischen Produkten mit verdichteter Struktur
EP0489503A1 (de) * 1990-11-30 1992-06-10 Micromatic Operations, Inc. Verfahren und Vorrichtung zur Herstellung von Formteilen aus halbfesten Metallvorformen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2026363A (en) * 1978-07-25 1980-02-06 Itt Process for shaping metal alloy products
US4579604A (en) * 1982-07-08 1986-04-01 Ni Industries, Inc. Method of spin forging a finished article
EP0379453A1 (de) * 1989-01-19 1990-07-25 Aluminium Pechiney Druckgiessverfahren zur Herstellung von metallischen Produkten mit verdichteter Struktur
EP0489503A1 (de) * 1990-11-30 1992-06-10 Micromatic Operations, Inc. Verfahren und Vorrichtung zur Herstellung von Formteilen aus halbfesten Metallvorformen

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* Cited by examiner, † Cited by third party
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US5979535A (en) * 1997-03-27 1999-11-09 Mazda Motor Corporation Methods for semi-melting injection molding
EP0867246A1 (de) * 1997-03-27 1998-09-30 Mazda Motor Corporation Verfahren und Vorrichtung zum Spritzgiessen halbflüssiger Metalle
EP0875318A1 (de) * 1997-05-01 1998-11-04 Ykk Corporation Verfahren und Anlage zur Herstellung von Giesstücken aus amorpher Legierung durch Druckguss
US6044893A (en) * 1997-05-01 2000-04-04 Ykk Corporation Method and apparatus for production of amorphous alloy article formed by metal mold casting under pressure
EP0897768A1 (de) * 1997-08-22 1999-02-24 Bühler AG Giesskammer für eine Druckgiessmaschine und ein Verfahren zum Entfernen von Verunreinigungen
US5954116A (en) * 1997-08-22 1999-09-21 Buhler Ag Shot sleeve and shot unit for a die casting machine
EP0940206A1 (de) * 1998-03-04 1999-09-08 Alusuisse Technology & Management AG Oxidabscheider
US6298901B1 (en) 1998-07-03 2001-10-09 Mazda Motor Corporation Method and apparatus for semi-molten metal injection molding
EP0968781A2 (de) * 1998-07-03 2000-01-05 Mazda Motor Corporation Verfahren und Vorrichtung zum Spritzgiessen halbflüssiger Metalle
US6470956B2 (en) 1998-07-03 2002-10-29 Mazda Motor Corporation Method and apparatus for semi-molten metal injection molding
EP0968781A3 (de) * 1998-07-03 2001-03-14 Mazda Motor Corporation Verfahren und Vorrichtung zum Spritzgiessen halbflüssiger Metalle
US6845809B1 (en) 1999-02-17 2005-01-25 Aemp Corporation Apparatus for and method of producing on-demand semi-solid material for castings
FR2794669A1 (fr) 1999-06-08 2000-12-15 Michelin Soc Tech Procede de fabrication d'une piece metallique, telle qu'une partie de roue destinee au roulage d'un vehicule, et une telle roue
EP1063033A1 (de) * 1999-06-08 2000-12-27 Société de Technologie Michelin Verfahren zur Herstellung eines Werkstücks aus Metall, wie ein Teil eines Fahrzeugrads, und entsprechendes Rad
WO2000076696A1 (en) * 1999-06-09 2000-12-21 Georg Fischer Disa A/S Casting method and mould string
DE10003791A1 (de) * 2000-01-28 2001-08-09 Forschungsges Umformtechnik Verfahren zur Herstellung von Felgen
DE10003791B4 (de) * 2000-01-28 2004-06-17 Forschungsgesellschaft Umformtechnik Mbh Verfahren zur Herstellung von Felgen
US6991670B2 (en) 2000-06-01 2006-01-31 Brunswick Corporation Method and apparatus for making a thixotropic metal slurry
US6402367B1 (en) 2000-06-01 2002-06-11 Aemp Corporation Method and apparatus for magnetically stirring a thixotropic metal slurry
US6399017B1 (en) 2000-06-01 2002-06-04 Aemp Corporation Method and apparatus for containing and ejecting a thixotropic metal slurry
US6932938B2 (en) 2000-06-01 2005-08-23 Mercury Marine Method and apparatus for containing and ejecting a thixotropic metal slurry
US6637927B2 (en) 2000-06-01 2003-10-28 Innovative Products Group, Llc Method and apparatus for magnetically stirring a thixotropic metal slurry
US6432160B1 (en) 2000-06-01 2002-08-13 Aemp Corporation Method and apparatus for making a thixotropic metal slurry
US6796362B2 (en) 2000-06-01 2004-09-28 Brunswick Corporation Apparatus for producing a metallic slurry material for use in semi-solid forming of shaped parts
US7024342B1 (en) 2000-07-01 2006-04-04 Mercury Marine Thermal flow simulation for casting/molding processes
US6611736B1 (en) 2000-07-01 2003-08-26 Aemp Corporation Equal order method for fluid flow simulation
CN1308103C (zh) * 2000-11-29 2007-04-04 米凯林技术公司 制造金属元件如车轮部件的方法及由该方法制造的车轮
WO2003045609A3 (de) * 2001-11-28 2003-10-09 Buehler Druckguss Ag Verfahren zur herstellung von druckgiessteilen und giesseinrichtung
WO2003045609A2 (de) * 2001-11-28 2003-06-05 Bühler Druckguss AG Verfahren zur herstellung von druckgiessteilen und giesseinrichtung
EA009003B1 (ru) * 2003-11-26 2007-10-26 Мэри Томас Гиллс Рэффл Способ и устройство для отливки металлических изделий
WO2005051570A1 (en) * 2003-11-26 2005-06-09 Price, James, Cairns Casting of metal artefacts
WO2007004241A1 (en) * 2005-07-05 2007-01-11 Aluminio Tecno Industriales Orinoco C.A. Process and plant for producing components made of thixotropic billets of an aluminium alloy for vehicules , and components obtained thereby
EP1970143A2 (de) 2007-03-15 2008-09-17 Bühler Druckguss AG Verfahren zur Herstellung von Druckgiessteilen und Giesseinrichtung
DE102007013200A1 (de) 2007-03-15 2008-09-18 Bühler Druckguss AG Verfahren zur Herstellung von Druckgiessteilen und Giesseinrichtung
RU2443496C1 (ru) * 2010-07-22 2012-02-27 Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") Способ получения изделий с полостями тиксоштамповкой и закрытый штамп для его осуществления
RU2443494C1 (ru) * 2010-07-22 2012-02-27 Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") Штамп и способ изготовления корпуса буксы из цилиндрической заготовки с глобулярной структурой
CN105705271A (zh) * 2013-09-05 2016-06-22 通用汽车环球科技运作有限责任公司 生产高性能轴对称部件的方法和设备
RU2709079C2 (ru) * 2017-11-08 2019-12-13 Акционерное общество Акционерная холдинговая Компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (АО АХК "ВНИИМЕТМАШ") Способ изготовления поршня с упрочняющим нирезистовым кольцом методом твёрдожидкого формования
RU2724235C2 (ru) * 2018-07-10 2020-06-22 Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технологический университет "СТАНКИН" (ФГБОУ ВО "МГТУ "СТАНКИН") Способ формообразования тонкополотной поковки

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ITBO940484A1 (it) 1996-05-07
IT1274094B (it) 1997-07-15
DE69506075D1 (de) 1998-12-24
EP0710515B1 (de) 1998-11-18
DE69506075T2 (de) 1999-04-15
ATE173419T1 (de) 1998-12-15
ITBO940484A0 (it) 1994-11-07

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