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EP2817113A1 - Pièces coulées en sable à agitation électromagnétique - Google Patents

Pièces coulées en sable à agitation électromagnétique

Info

Publication number
EP2817113A1
EP2817113A1 EP12791377.0A EP12791377A EP2817113A1 EP 2817113 A1 EP2817113 A1 EP 2817113A1 EP 12791377 A EP12791377 A EP 12791377A EP 2817113 A1 EP2817113 A1 EP 2817113A1
Authority
EP
European Patent Office
Prior art keywords
mold body
induction coil
mold
coil embedded
cope
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
EP12791377.0A
Other languages
German (de)
English (en)
Other versions
EP2817113B1 (fr
Inventor
Junyoung Park
Jason Robert PAROLINI
Jon Conrad Schaeffer
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to PL12791377T priority Critical patent/PL2817113T3/pl
Publication of EP2817113A1 publication Critical patent/EP2817113A1/fr
Application granted granted Critical
Publication of EP2817113B1 publication Critical patent/EP2817113B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • 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
    • B22D27/02—Use of electric or magnetic effects

Definitions

  • the invention relates generally to electromagnetic stirring of metal castings. More particularly, the invention relates to a casting system, mold, and method for electromagnetically stirring sand castings.
  • Sand casting refers to a metal casting process that uses sand as the mold material.
  • a binder such as, e.g., clay or resin, may be mixed with sand, and the mixture may be moistened. This produces an aggregate material having suitable strength and plasticity to form the mold.
  • the sand material is packed around a pattern, and the pattern is subsequently removed, leaving a cavity in the mold.
  • molten metal is poured into the mold cavity through a gating system, and the molten metal is allowed to solidify in the mold.
  • a gating system such as steel components of, e.g., wind turbines, which may weigh upwards of 4,500 to 5,000 kg (about 10,000 to 11,000 pounds)
  • the solidification process may take several days to a week or more. After the casting has cooled, it can be shaken out of the mold.
  • a first aspect of the disclosure provides a mold including a mold body having a cavity therein; the mold body further including a passageway fluidly connecting the cavity with an exterior of the mold, wherein the passageway allows for introduction of a molten metal into the cavity; and at least one induction coil embedded in the cope, or top half, of the mold, and at least one induction coil embedded in the drag, or bottom half, of the mold.
  • a second aspect of the disclosure provides a casting system comprising a mold body and a molten metal introduced into the mold.
  • the mold body may include: a cavity therein; a passageway fluidly connecting the cavity with an exterior of the mold body; and at least one fluid-cooled induction coil embedded in a cope of the mold body and at least one fluid-cooled induction coil embedded in a drag of the mold body.
  • the at least one fluid-cooled induction coil may be embedded in a cope of the mold body, and the at least one fluid-cooled induction coil may be embedded in a drag of the mold body to generate an electromagnetic field for stirring the molten metal during solidification of the molten metal.
  • a third aspect of the disclosure provides a method including: preparing a metal for casting, the preparing including melting the metal; introducing the molten metal into a cavity within a mold body; and using at least one induction coil, applying an electromagnetic field to the molten metal during solidification of the molten metal in the mold.
  • FIG. 1 shows a schematic drawing of an electromagnetic stirring apparatus in accordance with an embodiment of the disclosure.
  • FIG. 2 shows a three-dimensional drawing of an electromagnetic stirring apparatus in accordance with an embodiment of the disclosure.
  • FIG. 3 shows a flow chart depicting a process according to an embodiment of the disclosure.
  • aspects of the invention provide a casting system and mold structure for producing metal castings, shown in FIGS. 1-2 as well as a method of casting, shown in FIG. 3.
  • casting system 100 includes mold body 110.
  • mold body 110 may be made of sand, and my include resin as a binder.
  • Other possible binders may include clay, oil, or sodium silicate, among other binders.
  • Mold body 110 includes cavity 120 disposed therein, which may take a regular or irregular shape as appropriate to the three-dimensional shape of the desired casting.
  • a gating or passageway 130 fluidly connects cavity 120 with an exterior 140 of mold body 110. Passageway 130 allows for the introduction of molten metal 125 into cavity 120.
  • Metal 125 can be any metal, and may particularly be an alloy such as, e.g., steel, any ferrous metal, or any nonferrous, conductive metals.
  • At least one induction coil 150 may be embedded in cope 155 of mold body 110, and at least one induction coil 160 may be embedded in drag 165 of mold body 110.
  • Each induction coil 150, 160 is disposed about cavity 120 or a feature thereof.
  • the number of coils 150, 160 applied can vary depending upon the specific geometries of cavity 120 and therefore metal 125. For example, if cavity 120 and metal 125 have a feature or features that require specific properties, an induction coil 150, 160 may be applied to each feature.
  • Induction coils 150, 160 are fluid-cooled.
  • the fluid may be water. More specifically, in some embodiments, deionized water may be used.
  • induction coils 150 and 160 are low-frequency induction coils, operating at a frequency of, e.g., about 20 Hz to about 10 kHz.
  • Induction coils 150, 160 may further have a cross-sectional diameter of between about 5 and about 30 mm, and may have either a round or a rectangular cross sectional shape. In further embodiments, induction coils 150, 160 are made of copper, and coated with ceramic, providing improved heat resistance.
  • induction coils 150, 160 may be used to generate an electromagnetic field 170 which stirs metal 125 in cavity 120 as metal 125 solidifies. Stirring of metal 125 by electromagnetic field 170 serves to homogenize the cast structure, and thus minimizes the degrading effects of segregation in the metal 125 casting. Electromagnetic stirring further disperses any instances of shrinkage defects throughout the metal 125 casting, rather than allowing them to concentrate in the thermal center of the metal 125 casting. The resulting metal 125 casting demonstrates improved endurance limits for tramp elements. Further, metal 125 casting may have a finer grain structure, a reduction in the percentage of porosity, and improved mechanical properties as a result of the increased cooling rates. Faster cooling also decreases cycle time, increasing process efficiency.
  • step SI metal is melted and prepared for casting.
  • the metal prepared may be an alloy such as, e.g., steel.
  • the molten metal is introduced into a cavity in a mold.
  • the mold may include sand.
  • an electromagnetic field is generated and applied to the metal, stirring it while it solidifies within the mold.
  • the electromagnetic field may be generated by at least one induction coil.
  • step S4 the metal is cooled in substantial part by fluid flowing through the induction coils, which act as a cooling element.
  • the fluid may be water, or more specifically, deionized water.
  • step S5 the metal casting can be removed from the mold.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

La présente invention se rapporte à un système, à un moule et à un procédé de coulée destinés à l'agitation électromagnétique de pièces coulées en sable. Selon un mode de réalisation, le moule de coulée comprend un corps de moule renfermant une cavité, et un passage mettant la cavité en communication fluidique avec un extérieur du corps de moule. Le passage permet l'introduction d'un métal en fusion dans la cavité. Le corps de moule comprend en outre au moins une bobine d'induction encastrée dans une partie de dessus du corps de moule ; et au moins une bobine d'induction encastrée dans une partie de dessous du corps de moule. Les bobines d'induction sont configurées pour produire un champ électromagnétique destiné à agiter une pièce coulée à métal en fusion pendant sa solidification à l'intérieur du moule.
EP12791377.0A 2011-11-10 2012-11-09 Pièces coulées en sable à agitation électromagnétique Active EP2817113B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12791377T PL2817113T3 (pl) 2011-11-10 2012-11-09 Mieszane elektromagnetycznie odlewy w formach piaskowych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/293,198 US20130118704A1 (en) 2011-11-10 2011-11-10 Electromagnetically stirred sand castings
PCT/US2012/064416 WO2013071082A1 (fr) 2011-11-10 2012-11-09 Pièces coulées en sable à agitation électromagnétique

Publications (2)

Publication Number Publication Date
EP2817113A1 true EP2817113A1 (fr) 2014-12-31
EP2817113B1 EP2817113B1 (fr) 2020-10-14

Family

ID=47226460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12791377.0A Active EP2817113B1 (fr) 2011-11-10 2012-11-09 Pièces coulées en sable à agitation électromagnétique

Country Status (5)

Country Link
US (1) US20130118704A1 (fr)
EP (1) EP2817113B1 (fr)
CN (1) CN103930224A (fr)
PL (1) PL2817113T3 (fr)
WO (1) WO2013071082A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013158200A1 (fr) * 2012-04-20 2013-10-24 Fs Precision Tech Coulée en une seule pièce d'alliages réactifs

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US475498A (en) * 1892-05-24 Process of rendering iron
GB1584367A (en) * 1976-08-31 1981-02-11 Rolls Royce Mould assembly for producing multiple castings
GB2148761A (en) * 1983-09-26 1985-06-05 Kawachi Aluminium Casting Casting plate-like articles
US4766664A (en) * 1987-02-17 1988-08-30 Alumax Extrusions, Inc. Process for formation of high strength aluminum ladder structures
US5062386A (en) * 1987-07-27 1991-11-05 Epitaxy Systems, Inc. Induction heated pancake epitaxial reactor
JPH01192462A (ja) * 1988-01-26 1989-08-02 Toyota Motor Corp アルミニウム合金鋳物の製造方法
JPH0871731A (ja) * 1994-08-31 1996-03-19 Aisin Takaoka Ltd 鋳造方法
CN1583325A (zh) * 2003-08-20 2005-02-23 上海海立铸造有限公司 一种灰口铁缸体的精密铸造工艺
CN101032740A (zh) * 2006-03-07 2007-09-12 南开大学 连铸坯纵向电磁搅拌装置
KR101450939B1 (ko) * 2007-06-20 2014-10-14 쓰리엠 이노베이티브 프로퍼티즈 컴파니 웨브 상에서의 초음파 사출 성형
CN101342579B (zh) * 2008-08-04 2011-03-16 江苏吉鑫风能科技股份有限公司 无冷铁、无冒口铸造大功率风力发电机低温球铁底座的工艺方法
CN101486073B (zh) * 2008-12-04 2010-09-29 苏州明志科技有限公司 一种电磁金属型及其制造方法
CN201308985Y (zh) * 2008-12-17 2009-09-16 中国科学院金属研究所 一种低压脉冲磁场凝固装置
WO2011058568A1 (fr) * 2009-11-16 2011-05-19 Netanya Plasmatec Ltd. Dispositif et procédé pour traiter et mélanger des parties métalliques coulées dans un moule non conducteur
US8173980B2 (en) * 2010-05-05 2012-05-08 Tel Epion Inc. Gas cluster ion beam system with cleaning apparatus

Non-Patent Citations (1)

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Title
See references of WO2013071082A1 *

Also Published As

Publication number Publication date
WO2013071082A1 (fr) 2013-05-16
CN103930224A (zh) 2014-07-16
US20130118704A1 (en) 2013-05-16
EP2817113B1 (fr) 2020-10-14
PL2817113T3 (pl) 2021-04-19

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