EP0689485A1 - Semi-solid metal forming method - Google Patents
Semi-solid metal forming methodInfo
- Publication number
- EP0689485A1 EP0689485A1 EP95907033A EP95907033A EP0689485A1 EP 0689485 A1 EP0689485 A1 EP 0689485A1 EP 95907033 A EP95907033 A EP 95907033A EP 95907033 A EP95907033 A EP 95907033A EP 0689485 A1 EP0689485 A1 EP 0689485A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- forging
- piece
- semi
- shaping
- casting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/08—Controlling, supervising, e.g. for safety reasons
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/12—Making non-ferrous alloys by processing in a semi-solid state, e.g. holding the alloy in the solid-liquid phase
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S164/00—Metal founding
- Y10S164/90—Rheo-casting
Definitions
- the invention relates to a process for shaping metallic materials in the semi-solid state by die casting or by forging.
- thixotropic metal products in particular ferrous, cuprous or alumininium alloys
- the thixotropic metal, reheated in the semi-solid state is handled like a solid during its reheating and its transfer on the shaping machine, but behaves during the shaping like a homogeneous viscous liquid.
- the processes for manufacturing parts in the semi-solid state have advantages over conventional processes: lower shaping energy and faster cooling, which results in a reduction in shrinkage, higher production rates and less wear on tools or molds.
- These methods generally comprise the following stages: manufacture of billets or ingots of metal or thixotropic alloy with a primary phase with a partially or totally globular structure, by mechanical or electromagnetic stirring.
- One of the critical points of the process is the viscosity of the metal reheated in the semi-solid state. If the metal has too high a viscosity, it does not flow, during shaping, like a homogeneous liquid and the parts produced have internal defects. If, on the contrary, the viscosity is too low, one can no longer handle the piece as a solid, part of the metal flows and is lost, and the feeding of the shaping machine is out of adjustment.
- the viscosity in the semi-solid state depends on several parameters: a) the degree of globularity of the primary phase.
- the shearing speed is generally imposed by the shaping machine and the geometry of the part, so that the desired viscosity must be obtained by an adequate combination between the degree of globularity and the liquid fraction.
- this viscosity must be reproducible from one shaping cycle to another, so as to guarantee the reproducibility of the part itself, and therefore its quality.
- the heating of the piece plays a determining role for this reproducibility insofar as it conditions at the same time the rate of liquid fraction and the degree of globularity of the solid fraction during the maintenance in the semi-solid state, as shown by W.LOUE's thesis "Microstructural evolution and rheological behavior of aluminum-silicon alloys in the semi-solid state" Institut National Polytechnique de Grenoble, October 1992.
- the problem is then to find a simple way and reliable to permanently ensure a constant viscosity in the heated piece which will be introduced into the injection or forging press by acting on the regulation of the heating.
- the liquid fraction at a given temperature can vary depending on the differences in the composition of the alloy within the same standardized specification.
- the silicon in an aluminum alloy of the AlSi7Mg type (corresponding to the designations A356 and A357 of the Aluminum Association of the USA), the silicon can vary from 6.5 to 7.5%, which results in a significant variation in the liquid fraction at 577 C C.
- the degree of globality of the primary phase of the metal can also vary from one batch to another resulting in a constant liquid fraction, a variation in viscosity at a given temperature.
- alloys with a large isothermal eutectic plateau such as aluminum-silicon alloys, the temperature measurement does not provide information on the fraction melt eutectic.
- thermocouples or imprecise infrared measurements presents significant difficulties due to fouling of thermocouples or imprecise infrared measurements.
- the heating temperature can also be directly regulated by controlling the energy supplied to the oven, which is easily achievable in induction furnaces.
- the variation in the overall phase rate of the primary phase and the dispersion of the chemical compositions within the standardized specifications do not allow sufficient consistency of the viscosity of the heated piece to be ensured.
- the energy losses by convection can vary significantly for the same installation depending on local environment conditions such as ambient temperature or air currents.
- the object of the invention is to avoid the drawbacks of the methods described above and to provide a simple, effective and reliable means of regulating the viscosity of the heated piece by reheating, resulting in a constant and reproducible quality of the parts produced.
- the subject of the invention is a process for shaping metallic materials in the semi-solid state comprising: the preparation of a piece of thixotropic metallic material, corresponding to the weight of metal used in each cycle for manufacturing parts .es,
- the viscosity of the piece is regulated to the desired value thanks to a corresponding regulation of the heating power by a quantity linked to the resistance opposed by the material to forging punch or injection piston during the filling phase of the forging die or mold cavity.
- the quantity controlling the heating regulation may be the back pressure measured on the forging punch or the injection piston or, in the case of die casting, the speed of advance of the injection piston with hydraulic adjustment constant from the press.
- the thixoforming device includes:
- an induction heating oven comprising two zones, the powers of which can be regulated separately,
- a microcomputer which receives the values of piston speed and filling pressure from the pressure casting machine, uses this information in software which controls the heating power in the two zones of the reheating furnace.
- the principle of the regulation software consists in comparing the measured value of the piston speed with a set value, corresponding to the speed which has been chosen as giving satisfactory results at the stage of development of the part.
- the heating powers are incremented or decremented in successive steps, for example by 3%, until the setpoint is exceeded, then by smaller steps, for example 1%, to converge towards this, setpoint.
- EXAMPLE We have perfected the manufacturing of an automobile engine part with a batch of thixotropic aluminum alloy billets of the AlSi7Mg type on a die casting machine.
- the regulation of the heating system was then implemented using as a regulation parameter the speed of the piston, the filling pressure being only recorded.
- the program converged on the following setting of the heating powers:
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9400610 | 1994-01-17 | ||
FR9400610A FR2715088B1 (en) | 1994-01-17 | 1994-01-17 | Process for shaping metallic materials in the semi-solid state. |
PCT/FR1995/000042 WO1995019237A1 (en) | 1994-01-17 | 1995-01-13 | Semi-solid metal forming method |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0689485A1 true EP0689485A1 (en) | 1996-01-03 |
Family
ID=9459231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95907033A Withdrawn EP0689485A1 (en) | 1994-01-17 | 1995-01-13 | Semi-solid metal forming method |
Country Status (9)
Country | Link |
---|---|
US (1) | US5630466A (en) |
EP (1) | EP0689485A1 (en) |
JP (1) | JPH08507968A (en) |
CN (1) | CN1043319C (en) |
CA (1) | CA2153258A1 (en) |
DE (1) | DE689485T1 (en) |
FR (1) | FR2715088B1 (en) |
MX (1) | MX9503964A (en) |
WO (1) | WO1995019237A1 (en) |
Families Citing this family (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH689224A5 (en) * | 1994-05-18 | 1998-12-31 | Buehler Ag | Methods and apparatus for heating Metallkoerpern. |
JP3817786B2 (en) | 1995-09-01 | 2006-09-06 | Tkj株式会社 | Alloy product manufacturing method and apparatus |
JP3000442B2 (en) * | 1995-12-14 | 2000-01-17 | 本田技研工業株式会社 | Thixocasting method |
AU756027B2 (en) | 1997-10-20 | 2003-01-02 | Chipless Metals Llc. | Making precision castings using thixotropic materials |
US6427755B1 (en) | 1997-10-20 | 2002-08-06 | Chipless Metals Llc | Method of making precision casting using thixotropic materials |
US6474399B2 (en) * | 1998-03-31 | 2002-11-05 | Takata Corporation | Injection molding method and apparatus with reduced piston leakage |
US6540006B2 (en) | 1998-03-31 | 2003-04-01 | Takata Corporation | Method and apparatus for manufacturing metallic parts by fine die casting |
US6135196A (en) | 1998-03-31 | 2000-10-24 | Takata Corporation | Method and apparatus for manufacturing metallic parts by injection molding from the semi-solid state |
US5983976A (en) * | 1998-03-31 | 1999-11-16 | Takata Corporation | Method and apparatus for manufacturing metallic parts by fine die casting |
US6500284B1 (en) | 1998-06-10 | 2002-12-31 | Suraltech, Inc. | Processes for continuously producing fine grained metal compositions and for semi-solid forming of shaped articles |
US6120625A (en) * | 1998-06-10 | 2000-09-19 | Zhou; Youdong | Processes for producing fine grained metal compositions using continuous extrusion for semi-solid forming of shaped articles |
US6321824B1 (en) | 1998-12-01 | 2001-11-27 | Moen Incorporated | Fabrication of zinc objects by dual phase casting |
US6250364B1 (en) | 1998-12-29 | 2001-06-26 | International Business Machines Corporation | Semi-solid processing to form disk drive components |
US6845809B1 (en) | 1999-02-17 | 2005-01-25 | Aemp Corporation | Apparatus for and method of producing on-demand semi-solid material for castings |
CN1069072C (en) * | 1999-09-22 | 2001-08-01 | 河北科技大学 | Manufacture of wear resisting product |
US6666258B1 (en) | 2000-06-30 | 2003-12-23 | Takata Corporation | Method and apparatus for supplying melted material for injection molding |
US6432160B1 (en) | 2000-06-01 | 2002-08-13 | Aemp 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 |
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 |
US6611736B1 (en) | 2000-07-01 | 2003-08-26 | Aemp Corporation | Equal order method for fluid flow simulation |
US7024342B1 (en) | 2000-07-01 | 2006-04-04 | Mercury Marine | Thermal flow simulation for casting/molding processes |
US6742567B2 (en) * | 2001-08-17 | 2004-06-01 | Brunswick Corporation | Apparatus for and method of producing slurry material without stirring for application in semi-solid forming |
US6742570B2 (en) | 2002-05-01 | 2004-06-01 | Takata Corporation | Injection molding method and apparatus with base mounted feeder |
JP3549055B2 (en) * | 2002-09-25 | 2004-08-04 | 俊杓 洪 | Die casting method for metal material molding in solid-liquid coexistence state, apparatus therefor, die casting method for semi-solid molding and apparatus therefor |
JP3520991B1 (en) * | 2002-09-25 | 2004-04-19 | 俊杓 洪 | Method for producing metallic material in solid-liquid coexistence state |
JP3549054B2 (en) * | 2002-09-25 | 2004-08-04 | 俊杓 洪 | Method and apparatus for producing metallic material in solid-liquid coexistence state, method and apparatus for producing semi-solid metal slurry |
ITBO20030200A1 (en) * | 2003-04-04 | 2004-10-05 | Magneti Marelli Powertrain Spa | THIXOTROPIC ALUMINUM FUEL MANIFOLD FOR INJECTION |
US6945310B2 (en) * | 2003-05-19 | 2005-09-20 | Takata Corporation | Method and apparatus for manufacturing metallic parts by die casting |
US6951238B2 (en) * | 2003-05-19 | 2005-10-04 | Takata Corporation | Vertical injection machine using gravity feed |
US6880614B2 (en) * | 2003-05-19 | 2005-04-19 | Takata Corporation | Vertical injection machine using three chambers |
JP3990654B2 (en) * | 2003-07-02 | 2007-10-17 | 本田技研工業株式会社 | Semi-solid metal slurry manufacturing apparatus and control method thereof, and semi-solid metal slurry manufacturing method |
JP3630327B2 (en) * | 2003-07-15 | 2005-03-16 | 俊杓 洪 | Solid-liquid coexistence state metal slurry production equipment |
CN100338248C (en) * | 2003-11-20 | 2007-09-19 | 北京有色金属研究总院 | Aluminium alloy for semi solid state shaping and preparation method of its semi solid state blank material |
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 |
GB0514751D0 (en) * | 2005-07-19 | 2005-08-24 | Holset Engineering Co | Method and apparatus for manufacturing turbine or compressor wheels |
KR100950974B1 (en) * | 2009-08-25 | 2010-04-02 | (주)레오포즈 | Forging apparatus and forging method for rheocasting |
EP2895284B1 (en) * | 2012-09-12 | 2019-01-02 | Aluminio Tecno Industriales Orinoco C.A. | Process and plant for producing components made of an aluminium alloy for vehicles and white goods, and components obtained thereby |
CN103752798B (en) * | 2014-01-22 | 2015-12-02 | 张英华 | Reguline metal continuous casting streamline and reguline metal continuous casting process |
CN104439159A (en) * | 2014-12-29 | 2015-03-25 | 广州铝材厂有限公司 | Compound liquid forging squeeze casting equipment |
US9993996B2 (en) | 2015-06-17 | 2018-06-12 | Deborah Duen Ling Chung | Thixotropic liquid-metal-based fluid and its use in making metal-based structures with or without a mold |
CN113011056B (en) * | 2021-02-10 | 2021-09-21 | 北京科技大学 | Analysis of alloy semi-solid rheoforming and rheoforming numerical simulation method |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA957180A (en) * | 1971-06-16 | 1974-11-05 | Massachusetts, Institute Of Technology | Alloy compositions containing non-dendritic solids and process for preparing and casting same |
JPS5261503A (en) * | 1975-11-15 | 1977-05-21 | Kubota Ltd | Protecting device for flexible seal of inclined tilling knife shaft |
US4494461A (en) * | 1982-01-06 | 1985-01-22 | Olin Corporation | Method and apparatus for forming a thixoforged copper base alloy cartridge casing |
US4569218A (en) * | 1983-07-12 | 1986-02-11 | Alumax, Inc. | Apparatus and process for producing shaped metal parts |
US5040589A (en) * | 1989-02-10 | 1991-08-20 | The Dow Chemical Company | Method and apparatus for the injection molding of metal alloys |
JPH03221253A (en) * | 1990-01-26 | 1991-09-30 | Suzuki Motor Corp | Thixocasting process |
FR2671992B1 (en) * | 1991-01-30 | 1997-08-01 | Transvalor Sa | COLD CHAMBER PRESSURE CASTING PROCESS. |
JP2923823B2 (en) * | 1992-01-13 | 1999-07-26 | 本田技研工業株式会社 | Casting method of Al-based alloy casting |
US5394931A (en) * | 1992-01-13 | 1995-03-07 | Honda Giken Kogyo Kabushiki Kaisha | Aluminum-based alloy cast product and process for producing the same |
-
1994
- 1994-01-17 FR FR9400610A patent/FR2715088B1/en not_active Expired - Fee Related
-
1995
- 1995-01-13 US US08/501,030 patent/US5630466A/en not_active Expired - Fee Related
- 1995-01-13 WO PCT/FR1995/000042 patent/WO1995019237A1/en not_active Application Discontinuation
- 1995-01-13 CA CA002153258A patent/CA2153258A1/en not_active Abandoned
- 1995-01-13 MX MX9503964A patent/MX9503964A/en not_active IP Right Cessation
- 1995-01-13 DE DE0689485T patent/DE689485T1/en active Pending
- 1995-01-13 JP JP7518880A patent/JPH08507968A/en active Pending
- 1995-01-13 CN CN95190034A patent/CN1043319C/en not_active Expired - Fee Related
- 1995-01-13 EP EP95907033A patent/EP0689485A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO9519237A1 * |
Also Published As
Publication number | Publication date |
---|---|
JPH08507968A (en) | 1996-08-27 |
MX9503964A (en) | 1997-05-31 |
CN1043319C (en) | 1999-05-12 |
CA2153258A1 (en) | 1995-07-20 |
WO1995019237A1 (en) | 1995-07-20 |
DE689485T1 (en) | 1996-10-24 |
FR2715088A1 (en) | 1995-07-21 |
FR2715088B1 (en) | 1996-02-09 |
US5630466A (en) | 1997-05-20 |
CN1122115A (en) | 1996-05-08 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 19950821 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT CH DE ES GB IT LI |
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ITCL | It: translation for ep claims filed |
Representative=s name: ING. A. GIAMBROCONO & C. S.R.L. |
|
DET | De: translation of patent claims | ||
TCAT | At: translation of patent claims filed | ||
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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17Q | First examination report despatched |
Effective date: 19980313 |
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GRAH | Despatch of communication of intention to grant a patent |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19990105 |