CN101185961A - Electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting - Google Patents
Electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting Download PDFInfo
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- CN101185961A CN101185961A CNA2007101909632A CN200710190963A CN101185961A CN 101185961 A CN101185961 A CN 101185961A CN A2007101909632 A CNA2007101909632 A CN A2007101909632A CN 200710190963 A CN200710190963 A CN 200710190963A CN 101185961 A CN101185961 A CN 101185961A
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Abstract
The invention provides an electromagnetic inductor used for an aluminum alloy electromagnetic field assistant half-continuous casting. An electromagnetic inductor copper plate appears with copper plate structure. Two vertical copper plates are adopted, and the upper end and the lower end of the vertical copper plates are sealed by welding with copper bars to form a hollow single-circle copper plate coil. The two ends of the coil are respectively connected with a hollow copper block and the copper block is respectively connected with a connection block. Insulation pieces are arranged between the two ends of the coil and the coil is bent to form an annular closed state. Furthermore, a water-through copper tube is connected around the copper block and the water-through copper tube is communicated with the inner cavity of the coil. The adopting of the copper plate structure can guarantee the equal distribution of the electromagnetic field on an axial direction. The hollow structure of the coil can guarantee that cooling-water can form a loop without leakage when the inductor works. When in application, the electromagnetic inductor is arranged between a graphite liner and the inner wall of a crystallizer, and the coil is switched with an intermediate frequency AC to trigger an intermediate frequency AC electromagnetic field. The closer distance between the coil and an aluminum smelting body can guarantee the penetrating depth of the intermediate frequency magnetic field so as to dramatically enhance the effect of the electromagnetic field.
Description
Technical field
The present invention relates to a kind of electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting, belong to the aluminum alloy semi-continuous casting technical field.
Background technology
In order to improve the aluminium alloy cast ingot surface casting flaw that cold shut is more, segregation is more serious, The former Russian scholar Getselev has created the electromagnetic casting technology, this technology is by the moulding of electromagnetic force constraint molten metal fully, has replaced the mode of conventional cast by crystallizer inwall restriction molding.Therefore, the aluminium alloy ingots surface of adopting the electromagnetic casting preparation is light very, can directly push without turning, rolling.But electromagnetic casting requires the coupling of casting parameter and electromagnetic parameter very accurate, otherwise is easy to bleedout even is difficult to cast form.For improving the operability of electromagnetic casting, the electromagnetic field auxiliary semi-continuous casting technology has appearred, this technology is to apply electromagnetic field on the basis of traditional mould casting, make the interior metal bath of crystallizer be subjected to the effect of electromagnetism radial thrust, melt contacts static pressure with crystallizer wall and reduces greatly, and the surface quality of ingot casting has obtained remarkable improvement.
The integration mode of the design of electromagnetic induction coil and it and crystallizer is to realize the key of electromagnetic field auxiliary aluminum alloy semi-continuous casting, and electromagnetic inductor can adopt copper coil or copper coin to be entwined.Though adopt the multi turn coil arrangement inductor to have the high advantage of number of ampere turns, magnetic field is inhomogeneous in axial distribution, and device stability is poor.In addition, because " kelvin effect " of electromagnetic field, electromagnetic field is the meeting strong attenuation in different medium, and as calculated, the skin depth of electromagnetic field in aluminium is about 4mm, and the skin depth in graphite is about 40mm.Conventional crystallizer inwall generally comprises aluminium and graphite liner, and wall thickness is generally 20～40mm in the aluminium.Therefore how to design and arrange that coil guarantees that magnetic field can uniformly penetrating be the key and the difficult point of electromagnetic field auxiliary casting technology to the aluminum melt in the crystallizer.
Adopt the inductor of multi turn coil arrangement, magnetic field is inhomogeneous in axial distribution, and coil turn is many, less stable; In order to reduce the distance of coil to aluminum melt, normal with in the cavity of induction coil layout between graphite liner and crystallizer inwall, because cooling water brings difficulty without this cavity, for the cooling of coil.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of electromagnetic field auxiliary aluminum alloy semi-continuous casting electromagnetic inductor is provided.
Purpose of the present invention is achieved through the following technical solutions:
A kind of electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting, it is characterized in that: described electromagnetic inductor copper coin is the copper coin structure, by two erect copper coins, two ends form the single turn copper coin coil of hollow structure with the copper bar seal welding up and down, the two ends position of coil is connected with the copper billet of hollow respectively, be connected to tagblock on the copper billet respectively, be provided with insulating trip between the two ends of coil, coil bending forms annular closed form; In addition, be connected with the water flowing copper pipe near copper billet, the water flowing copper pipe is communicated with the coil inner chamber.
Further, above-mentioned a kind of electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting is coupled to each other two copper coins by rivet two middle parts of erectting copper coin.
Further, above-mentioned a kind of electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting is welded with the copper billet of hollow respectively at the two ends position of coil, be welded with the water flowing copper pipe near copper billet.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
Electromagnetic inductor of the present invention adopts the copper coin structure to guarantee electromagnetic field even distribution in the axial direction, cooling water can form the loop when coil hollow structure was guaranteed inductor work, and can seepage, in cooling coil itself, avoided cooling water and the possibility that the liquid aluminium melt directly contacts, cast as safe as a house.During application, electromagnetic inductor places between graphite liner and the crystallizer inwall, coil feeds the intermediate frequency alternating current, excite the intermediate frequency alternating electromagnetic field, coil and aluminum melt close together, guarantee the length of penetration in intermediate frequency magnetic field, improved the action effect of electromagnetic field greatly, significantly improved the surface quality of ingot casting.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1: the front view of electromagnetic inductor;
Fig. 2: the vertical view of electromagnetic inductor;
Fig. 3: the right view of electromagnetic inductor;
Fig. 4: the schematic diagram when electromagnetic inductor is used.
The implication of each Reference numeral sees the following form among the figure:
| Reference numeral | Implication | Reference numeral | Implication | Reference numeral | Implication |
| 1 | |
2 | |
3 | |
| 4 | |
61 | The water flowing |
62 | The water flowing |
| 71 | |
72 | Tagblock | 8 | Insulating trip |
| 91 | Copper billet | 92 | Copper billet | 10 | The crystallizer loam cake |
| 11 | The crystallizer body | 12 | Water fender | 13 | Electromagnetic inductor |
| 14 | The graphite liner | 15 | Cooling water hole | 16 | Aluminium alloy melt |
| 17 | Mushy Zone | 18 | Ingot casting |
The specific embodiment
Shown in Fig. 1～3, electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting, be the copper coin cavity structure, the single turn copper coin coil that copper coin 1 and copper coin 3 are erect, two ends form hollow structure with copper bar 2 seal weldings up and down, in the middle of copper coin 1 and copper coin 3, two copper coins are coupled to each other, have strengthened the intensity of coil side wall double-layer copper coin with rivet 4; Be welded with the copper billet 91 and the copper billet 92 of hollow respectively at the two ends position of coil, connect a tagblock 71 on the copper billet 91, connect a tagblock 72 on the copper billet 92, tagblock 71 and tagblock 72 connect the both positive and negative polarity of transformer respectively, be provided with insulating trip 8 between the two ends of coil, insulating trip 8 is with copper billet 91 and copper billet 92 electrical isolation, and insulating trip 8 is also with tagblock 71 and tagblock 72 electrical isolation simultaneously; The copper coin coil bending that copper coin 1 and copper coin 3 is combined into according to the size and dimension of crystallizer becomes the structure of needs, forms annular closed form; In addition, near the opening of copper billet 91, be welded with water flowing copper pipe 61, near the opening of copper billet 92, be welded with water flowing copper pipe 62, water flowing copper pipe 61 and water flowing copper pipe 62 are communicated with the coil inner chamber, cooling water can flow to the coil inner chamber from water flowing copper pipe 61 during work, the circulation cooling coil is flowed out from water flowing copper pipe 62 in the cooling back.
Adopt the inductor of copper coin structure to guarantee electromagnetic field even distribution in the axial direction.The special hollow structure of coil guarantees that inductor when work cooling water can form the loop, and can seepage, and that has avoided in cooling coil itself that cooling water and liquid aluminium melt directly contact is possible, has guaranteed casting safety.Electromagnetic inductor is arranged between graphite liner and the crystallizer inwall, coil feeding frequency range is that 500～3000Hz, strength range are the intermediate frequency alternating current of 1000～10000A during casting, excite the intermediate frequency alternating electromagnetic field, coil and aluminum melt close together, guarantee the length of penetration in intermediate frequency magnetic field, improved the action effect of electromagnetic field.
Electromagnetic inductor of the present invention is applicable to the semi-continuous casting of aluminum alloy round ingot and slab ingot, as Fig. 4, crystallizer comprises crystallizer body 11 and crystallizer loam cake 10, the crystallizer inwall is inlaid with graphite liner 14, graphite liner 14 is assemblied in the crystallizer body 11 corresponding draw-in grooves, electromagnetic inductor 13 of the present invention is arranged between graphite liner 14 and the crystallizer inwall, insulate by insulation board and crystallizer body around the electromagnetic inductor 13; In the inner chamber of crystallizer body, establish water fender 12, also have oblique cooling water hole 15 on the crystallizer body.Smear lubricating oil to graphite liner 14 equably before the casting, make graphite surface form skim oil film equably, cooling water cavity and electromagnetic inductor are connected cooling water respectively.Aluminium alloy melt 16 at first is full of base during the casting beginning, and along with the continuous inflow of melt, the liquid level of melt constantly raises in the crystallizer.This moment, it is 500～3000Hz that electromagnetic induction coil feeds frequency range, and intensity is the intermediate frequency alternating current of 1000～10000A, excites alternating electromagnetic field.Under the effect of electromagnetic field, the electromagnetic force that the aluminium alloy melt of crystallizer is subjected to radially forms " meniscus " that upwards arches upward, Mushy Zone 17 is arranged on ingot casting 18, and casting begin and the process of carrying out in, as long as casting parameter, electromagnetic parameter and metal flow are constant, the state of meniscus is just constant.Adopt the coil of this structural design not only to guarantee the even distribution of electromagnetic field, and, improved the action effect of electromagnetic field because appropriate arrangement has reduced the consumption of crystallizer to electromagnetic field.
Use shows, adopts the coil of this structure and this arrangement, feeds less current and can realize preferable electromagnetic field auxiliary casting effect, and the surface quality of ingot casting is significantly improved.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (3)
1. electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting, it is characterized in that: described electromagnetic inductor copper coin is the copper coin structure, by two erect copper coins, two ends form the single turn copper coin coil of hollow structure with the copper bar seal welding up and down, the two ends position of coil is connected with the copper billet of hollow respectively, be connected to tagblock on the copper billet respectively, be provided with insulating trip between the two ends of coil, coil bending forms annular closed form; In addition, be connected with the water flowing copper pipe near copper billet, the water flowing copper pipe is communicated with the coil inner chamber.
2. a kind of electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting according to claim 1 is characterized in that: two copper coins are coupled to each other by rivet two middle parts of erectting copper coin.
3. a kind of electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting according to claim 1 is characterized in that: be welded with the copper billet of hollow at the two ends position of coil respectively, be welded with the water flowing copper pipe near copper billet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101909632A CN100566889C (en) | 2007-11-30 | 2007-11-30 | A kind of electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101909632A CN100566889C (en) | 2007-11-30 | 2007-11-30 | A kind of electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting |
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| Publication Number | Publication Date |
|---|---|
| CN101185961A true CN101185961A (en) | 2008-05-28 |
| CN100566889C CN100566889C (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101909632A Active CN100566889C (en) | 2007-11-30 | 2007-11-30 | A kind of electromagnetic sensor for aluminum alloy electromagnetic field auxiliary semi-continuous casting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398005A (en) * | 2011-11-18 | 2012-04-04 | 江苏大学 | Built-in type electromagnetic stirring device and application method thereof |
| CN103374644A (en) * | 2013-06-21 | 2013-10-30 | 江苏大学机电总厂有限公司 | Inducing conductor processing technique for high-frequency quenching on complicated surface |
| CN110340329A (en) * | 2019-08-28 | 2019-10-18 | 江苏亚太航空科技有限公司 | A kind of aluminium and aluminium alloy low pressure Semi-continuous casting crystallizer cooling system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3646988A (en) * | 1970-05-20 | 1972-03-07 | Getselev Zinovy N | Induction apparatus for continuous and semicontinuous casting |
-
2007
- 2007-11-30 CN CNB2007101909632A patent/CN100566889C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398005A (en) * | 2011-11-18 | 2012-04-04 | 江苏大学 | Built-in type electromagnetic stirring device and application method thereof |
| CN102398005B (en) * | 2011-11-18 | 2014-03-12 | 江苏大学 | Built-in type electromagnetic stirring device and application method thereof |
| CN103374644A (en) * | 2013-06-21 | 2013-10-30 | 江苏大学机电总厂有限公司 | Inducing conductor processing technique for high-frequency quenching on complicated surface |
| CN110340329A (en) * | 2019-08-28 | 2019-10-18 | 江苏亚太航空科技有限公司 | A kind of aluminium and aluminium alloy low pressure Semi-continuous casting crystallizer cooling system |
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| Publication number | Publication date |
|---|---|
| CN100566889C (en) | 2009-12-09 |
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Effective date of registration: 20171121 Address after: 102209 Changping District City, Beiqijia, the future of science and technology in the south area of the town of Beijing Patentee after: China Aluminum Material Applied Research Institute Co Ltd Address before: Suzhou City, Jiangsu province 215021 Industrial Park No. 200 Shen Hu Road Patentee before: Suzhou Non-ferrous Metal academy Co., Ltd. |