CN103930224A - Electromagnetically stirred sand castings - Google Patents
Electromagnetically stirred sand castings Download PDFInfo
- Publication number
- CN103930224A CN103930224A CN201280055290.9A CN201280055290A CN103930224A CN 103930224 A CN103930224 A CN 103930224A CN 201280055290 A CN201280055290 A CN 201280055290A CN 103930224 A CN103930224 A CN 103930224A
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- CN
- China
- Prior art keywords
- die body
- induction coil
- embedded
- metal
- mould
- 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.)
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
A casting system, mold, and method are disclosed for electromagnetically stirring sand castings. In an embodiment, the casting mold includes a mold body having a cavity therein, and a passageway fluidly connecting the cavity with an exterior of the mold body. The passageway allows for introduction of a molten metal into the cavity. The mold body further includes at least one induction coil embedded in a cope of the mold body; and at least one induction coil embedded in a drag of the mold body. The induction coils are configured to generate an electromagnetic field for stirring a molten metal casting while it solidifies inside the mold.
Description
Technical field
The present invention relates in general to the electromagnetic agitation of metal casting.More specifically, the present invention relates to a kind of casting system for electromagnetic agitation sand-cast, casting mould and casting method.
Background technology
Sand casting refers to the metal casting process of sand as mold materials that use.The binding agent of for example clay or resin can mix with sand, and described mixture can be got wet.This generation has suitable intensity and plasticity to form the aggregate of mould.Sand material is filled around an apperance, and removes subsequently described apperance, stays next cavity in mould.
In casting process, motlten metal injects mould cavity by running gate system, and allows described motlten metal to solidify in mould.For large-scale metal casting, for example may be 4 as the weight of wind turbine, 500kg to 5, the steel part of 000kg above (approximately 10,000 pounds to 11,000 pounds), process of setting may spend several days to one week or the longer time.After foundry goods is cooling, described foundry goods can vibrate out from mould.
There are some challenges the very long cool time being associated with sand casting.Steel and other alloy-steel castings may easily produce due to different reactions element segregation in cooling procedure.The time of cooling cost is longer, that is, circulation timei is longer, and the risk that this thing happens is just larger.Element segregation can produce the defect that weakens structure in gained foundry goods.When feed metal is because metal is cooling and solidify while being not useable for compensate for shrinkage, also can shrink defect.These defects can be gathered in the thermal center (-tre) of foundry goods naturally, thereby can disproportionately weaken that region of gained foundry goods.
Summary of the invention
A first aspect of the present invention provides a kind of mould, and described mould comprises the die body wherein with cavity; Described die body further comprises: the passage that described cavity is connected with the external fluid of described mould, and wherein said passage allows motlten metal to introduce in described cavity; And be embedded at least one induction coil in cope (cope) or the mo(u)ld top half (top half) of described mould and be embedded at least one induction coil in drag box or the mo(u)ld bottom half of described mould.
A second aspect of the present invention provides a kind of casting system, and described casting system comprises die body and is directed to the motlten metal in mould.Described die body can comprise: the cavity in described die body; The passage that described cavity is connected with the external fluid of described die body; And be embedded in the cooling induction coil of at least one fluid in the cope of described die body and be embedded in the cooling induction coil of at least one fluid in the drag box of described die body.The cooling induction coil of described at least one fluid can be embedded in the cope of die body, and the cooling induction coil of described at least one fluid can be embedded in the drag box of die body, to produce the electromagnetic field for stir described motlten metal at motlten metal solidificating period.
A third aspect of the present invention provides a kind of method, and described method comprises: for the preparation of the metal of casting, described preparation comprises metal molten; Motlten metal is directed in the cavity in die body; And use at least one induction coil, at motlten metal solidificating period in mould, electromagnetic field is put on to described motlten metal.
Read following detailed description and can be well understood to these and other aspects of the present invention, advantage and notable feature, when be combined reading with accompanying drawing, below explanation, for open embodiments of the invention, in the accompanying drawings, similarly partly represents by similar reference symbol.
Brief description of the drawings
Fig. 1 illustrates the schematic diagram of electromagnetic mixing apparatus according to an embodiment of the invention.
Fig. 2 illustrates the 3-D view of electromagnetic mixing apparatus according to an embodiment of the invention.
Fig. 3 illustrates and describes the flow chart of process according to an embodiment of the invention.
Detailed description of the invention
As noted above, each aspect of the present invention provides a kind of casting method shown in a kind of casting system for the production of metal casting shown in Fig. 1 to Fig. 2 and mould structure and Fig. 3.
With reference to Fig. 1, casting system 100 comprises die body 110.In an embodiment, die body 110 can be made up of molding sand, and can comprise the resin as binding agent.Other possible binding agents can comprise clay, oil or sodium metasilicate etc. binding agent.Die body 110 comprises the cavity 120 being arranged on wherein, and described cavity 120 can be taked rule or irregular shape, depending on the 3D shape of required foundry goods.Cast gate (gating) or passage 130 are connected cavity 120 with outside 140 fluids of die body 110.Passage 130 allows motlten metal 125 to be directed in cavity 120.Metal 125 can be any metal, and can be specifically alloy, for example, as steel, any ferrous metal or any coloured conducting metal.
With reference to Fig. 2, at least one induction coil 150 can be embedded in the cope 155 of die body 110, and at least one induction coil 160 can be embedded in the drag box 165 of die body 110.Each induction coil 150,160 equal surrounding cavity 120 or its feature arrange.The coil of applying 150,160 number can according to cavity 120 and therefore the geometry in particular of metal 125 change.For example, if cavity 120 and metal 125 have the one or more features that need particular characteristic, induction coil 150,160 can be applicable to each feature.
It is cooling that induction coil 150,160 carries out fluid.In certain embodiments, fluid can be water.More properly, in certain embodiments, can use deionized water.In other embodiments, induction coil 150 and 160 is low frequency induction coil, operates to the frequency of about 10kHz at for example about 20Hz.Induction coil 150,160 can further have the diameter of section between about 5mm and about 30mm, and can have the cross sectional shape of circle or rectangle.In other embodiments, induction coil 150,160 is made of copper, and is coated with pottery, to the heat resistance of improvement is provided.
Referring back to Fig. 1, induction coil 150,160 can be used for generating an electromagnetic field 170, and described electromagnetic field 170, in the time that metal 125 solidifies, stirs the metal 125 in cavity 120.By electromagnetic field 170, the stirring of metal 125 is used for making cast structure homogenising, and therefore makes the deteriorated impact of segregation in metal 125 foundry goods minimize.Electromagnetic agitation is further dispersed in any shrink defects situation on whole metal 125 foundry goods, instead of allows them to be gathered in the thermal center (-tre) of metal 125 foundry goods.Gained metal 125 foundry goods have improved the limit of bearing for residual elements.In addition the porosity percentage that due to the cooldown rate improving, metal 125 foundry goods can have meticulousr grain structure, reduce and the mechanical performance of improvement.Coolingly faster also reduce circulation timei, thereby improve process efficiency.
With reference to Fig. 3, also provide a kind of casting method.In step S1, metal molten is also prepared for casting.Prepared metal can be alloy, for example, as steel.In step S2, motlten metal is directed in the cavity in mould.In one embodiment, mould can comprise molding sand.In step S3, generate an electromagnetic field and described electromagnetic field is put on to metal, in the time that solidifying in mould, described metal stirs it.Electromagnetic field can produce by least one induction coil.In certain embodiments, in each in cope and the drag box of mould, all can there is at least one induction coil.In step S4, metal is that to flow through induction coil by fluid cooling on quite a few, and described induction coil serves as cooling element.Fluid can be water, or more properly, deionized water.In step S5, metal casting can be removed from mould.
By this way, can production electromagnetic agitation sand-cast.Term " first " that this description uses, " second " etc. are not indicated any order, quantity or importance, but be used for distinguishing different elements, and term " " and " one " are not indicated logarithm quantitative limitation in this manual, but there is at least one mentioned project in instruction.The determiner " approximately " being combined with quantity comprises described value, and has the indicated meaning of context (for example, comprising the degree of error being associated with the measurement of specific quantity).In addition, the suffix " (s) " that this description uses is intended to odd number and the plural number of the term that comprises its restriction, can comprise thus this term one or more (for example, metal (metal (s)) comprises one or more metals).Scope described in this description comprises range boundary, and can independently combine (for example, scope " be no more than approximately 5,000kg; or more properly, approximately 4,500kg is to approximately 5,000kg " comprises end points and all medians of scope " approximately 4; 500kg is to approximately 5,000kg ", etc.).
Although described multiple embodiment in this description, from description, should be appreciated that, one of skill in the art can carry out various combinations, variation or improvement to element wherein, and these combinations, variation or improvement are within the scope of the invention.In addition, can in the situation that not departing from base region of the present invention, make many amendments, so that special circumstances or material are applicable to religious doctrine of the present invention.Therefore, meaning is sought for, and the present invention is not limited to carry out disclosed specific embodiment as expection for implementing optimal mode of the present invention, and contrary the present invention will comprise all embodiment that fall within the scope of appended claims.
Claims (20)
1. a mould, described mould comprises the die body wherein with cavity, described die body further comprises:
The passage that described cavity is connected with the external fluid of described die body, wherein said passage allows motlten metal to be directed in described cavity;
Be embedded at least one induction coil in the cope of described die body; And
Be embedded at least one induction coil in the drag box of described die body.
2. mould as claimed in claim 1, wherein said die body further comprises molding sand.
3. mould as claimed in claim 1, wherein said metal further comprises the one in steel, ferrous metal or coloured conducting metal.
4. mould as claimed in claim 1, is wherein embedded in described at least one induction coil in the described cope of described die body and is embedded in described at least one induction coil in the described drag box of described die body that to carry out fluid cooling.
5. mould as claimed in claim 4, wherein said cooling fluid further comprises deionized water.
6. mould as claimed in claim 1, described at least one induction coil that is wherein embedded in described at least one induction coil in the described cope of described die body and be embedded in the described drag box of described die body further comprises copper, and wherein said copper is coated with pottery.
7. mould as claimed in claim 1, is wherein embedded in described at least one induction coil in the described cope of described die body and is embedded in described at least one induction coil in the described drag box of described die body with the frequency work between about 20Hz and about 10kHz.
8. mould as claimed in claim 1, is wherein embedded in described at least one induction coil in the described cope of described die body and is embedded in described at least one induction coil in the described drag box of described die body and be configured for and produce for stir the electromagnetic field of described motlten metal at described motlten metal solidificating period.
9. mould as claimed in claim 1, is wherein embedded in described at least one induction coil in the described cope of described die body and is embedded in described at least one induction coil in the described drag box of described die body and further comprise the cross sectional shape of circle or rectangle and the about 5mm diameter of section to about 30mm.
10. a casting system, described casting system comprises:
Die body, described die body comprises:
Cavity wherein;
The passage that described cavity is connected with the external fluid of described die body, wherein said passage allows motlten metal to be directed in described cavity; And
Be embedded in the cooling induction coil of at least one fluid in the cope of described die body and be embedded in the cooling induction coil of at least one fluid in the drag box of described die body,
Wherein be embedded in the cooling induction coil of described at least one fluid in the cope of described die body and be embedded in the cooling induction coil of described at least one fluid in the drag box of described die body and be configured for and produce for stir the electromagnetic field of described motlten metal at described motlten metal solidificating period.
11. casting systems as claimed in claim 10, wherein said die body further comprises molding sand.
12. casting systems as claimed in claim 10, wherein said metal further comprises the one in steel, ferrous metal or coloured conducting metal.
13. casting systems as claimed in claim 10, described at least one induction coil that is wherein embedded in described at least one induction coil in the described cope of described die body and be embedded in the described drag box of described die body further comprises copper, and wherein said copper is coated with pottery.
14. casting systems as claimed in claim 10, wherein said cooling fluid further comprises deionized water.
15. casting systems as claimed in claim 10, are wherein embedded in described at least one induction coil in the described cope of described die body and are embedded in described at least one induction coil in the described drag box of described die body with the frequency work between about 20Hz and about 10kHz.
16. casting systems as claimed in claim 10, are wherein embedded in described at least one induction coil in the described cope of described die body and are embedded in described at least one induction coil in the described drag box of described die body and further comprise the cross sectional shape of circle or rectangle and the about 5mm diameter of section to about 30mm.
17. 1 kinds of methods, described method comprises:
Metal molten is used for to casting;
Described motlten metal is directed in the cavity in die body; And
Use at least one induction coil, electromagnetic field is put on to described motlten metal the described motlten metal in described die body is carried out to solidificating period.
18. methods as claimed in claim 17, described method further comprises cooling described motlten metal, make fluid flow through described at least one induction coil wherein said cooling comprising, and wherein said cooling fluid further comprises deionized water.
19. methods as claimed in claim 17, wherein said motlten metal further comprises the one in steel, ferrous metal or coloured conducting metal.
20. methods as claimed in claim 17, wherein said die body further comprises molding sand.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/293198 | 2011-11-10 | ||
| US13/293,198 US20130118704A1 (en) | 2011-11-10 | 2011-11-10 | Electromagnetically stirred sand castings |
| PCT/US2012/064416 WO2013071082A1 (en) | 2011-11-10 | 2012-11-09 | Electromagnetically stirred sand castings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103930224A true CN103930224A (en) | 2014-07-16 |
Family
ID=47226460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280055290.9A Pending CN103930224A (en) | 2011-11-10 | 2012-11-09 | Electromagnetically stirred sand castings |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20130118704A1 (en) |
| EP (1) | EP2817113B1 (en) |
| CN (1) | CN103930224A (en) |
| PL (1) | PL2817113T3 (en) |
| WO (1) | WO2013071082A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013158200A1 (en) * | 2012-04-20 | 2013-10-24 | Fs Precision Tech | Single piece casting of reactive alloys |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US475498A (en) * | 1892-05-24 | Process of rendering iron | ||
| EP0141180A1 (en) * | 1983-09-26 | 1985-05-15 | Kawachi Aluminium Casting Co. Ltd. | Casting apparatus |
| JPH0871731A (en) * | 1994-08-31 | 1996-03-19 | Aisin Takaoka Ltd | Casting method |
| CN1583325A (en) * | 2003-08-20 | 2005-02-23 | 上海海立铸造有限公司 | Precision casting process of grey iron cylinder |
| CN101032740A (en) * | 2006-03-07 | 2007-09-12 | 南开大学 | Casting unburnt earthenware lengthways electromagnetic mixing device |
| CN201308985Y (en) * | 2008-12-17 | 2009-09-16 | 中国科学院金属研究所 | Low-voltage pulse magnetic field coagulation device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1584367A (en) * | 1976-08-31 | 1981-02-11 | Rolls Royce | Mould assembly for producing multiple castings |
| 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 (en) * | 1988-01-26 | 1989-08-02 | Toyota Motor Corp | Manufacture of aluminum alloy casting |
| US8236231B2 (en) * | 2007-06-20 | 2012-08-07 | 3M Innovative Properties Company | Ultrasonic injection molding on a web |
| CN101342579B (en) * | 2008-08-04 | 2011-03-16 | 江苏吉鑫风能科技股份有限公司 | Non-chill, non-flash groove cast process for high-power wind-driven generator low-temperature spheroidal iron base plate |
| CN101486073B (en) * | 2008-12-04 | 2010-09-29 | 苏州明志科技有限公司 | Electromagnetic metal mould and method for producing the same |
| WO2011058568A1 (en) * | 2009-11-16 | 2011-05-19 | Netanya Plasmatec Ltd. | Treating and stirring metal parts cast in non-conductive mold |
| US8173980B2 (en) * | 2010-05-05 | 2012-05-08 | Tel Epion Inc. | Gas cluster ion beam system with cleaning apparatus |
-
2011
- 2011-11-10 US US13/293,198 patent/US20130118704A1/en not_active Abandoned
-
2012
- 2012-11-09 EP EP12791377.0A patent/EP2817113B1/en active Active
- 2012-11-09 CN CN201280055290.9A patent/CN103930224A/en active Pending
- 2012-11-09 WO PCT/US2012/064416 patent/WO2013071082A1/en active Application Filing
- 2012-11-09 PL PL12791377T patent/PL2817113T3/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US475498A (en) * | 1892-05-24 | Process of rendering iron | ||
| EP0141180A1 (en) * | 1983-09-26 | 1985-05-15 | Kawachi Aluminium Casting Co. Ltd. | Casting apparatus |
| JPH0871731A (en) * | 1994-08-31 | 1996-03-19 | Aisin Takaoka Ltd | Casting method |
| CN1583325A (en) * | 2003-08-20 | 2005-02-23 | 上海海立铸造有限公司 | Precision casting process of grey iron cylinder |
| CN101032740A (en) * | 2006-03-07 | 2007-09-12 | 南开大学 | Casting unburnt earthenware lengthways electromagnetic mixing device |
| CN201308985Y (en) * | 2008-12-17 | 2009-09-16 | 中国科学院金属研究所 | Low-voltage pulse magnetic field coagulation device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013071082A1 (en) | 2013-05-16 |
| EP2817113A1 (en) | 2014-12-31 |
| PL2817113T3 (en) | 2021-04-19 |
| EP2817113B1 (en) | 2020-10-14 |
| US20130118704A1 (en) | 2013-05-16 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140716 |