CN103390492B - A kind of production technology of the ultracrystallite cutting iron core of open-close type transformer - Google Patents
A kind of production technology of the ultracrystallite cutting iron core of open-close type transformer Download PDFInfo
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- CN103390492B CN103390492B CN201310325209.0A CN201310325209A CN103390492B CN 103390492 B CN103390492 B CN 103390492B CN 201310325209 A CN201310325209 A CN 201310325209A CN 103390492 B CN103390492 B CN 103390492B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000005520 cutting process Methods 0.000 title claims abstract description 15
- 238000005516 engineering process Methods 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000003973 paint Substances 0.000 claims abstract description 13
- 238000010792 warming Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000007598 dipping method Methods 0.000 claims abstract description 9
- 238000007493 shaping process Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 13
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 2
- 102100028735 Dachshund homolog 1 Human genes 0.000 claims description 2
- 101000915055 Homo sapiens Dachshund homolog 1 Proteins 0.000 claims description 2
- SSJXIUAHEKJCMH-UHFFFAOYSA-N cyclohexane-1,2-diamine Chemical compound NC1CCCCC1N SSJXIUAHEKJCMH-UHFFFAOYSA-N 0.000 claims description 2
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 claims description 2
- 229960001124 trientine Drugs 0.000 claims description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- 150000001412 amines Chemical class 0.000 claims 1
- 239000013081 microcrystal Substances 0.000 claims 1
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 239000004922 lacquer Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 229910000889 permalloy Inorganic materials 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Abstract
The production technology of the ultracrystallite cutting iron core of a kind of open-close type transformer, step includes: a, is put by ultracrystallite band iron core and is wound into iron core on the winder, and spot welding is firm；B, being heat-treated by above-mentioned iron core, heat treatment process uses temperature-gradient method mode, is first warming up to 380 DEG C, is incubated 10～50 minutes, then is warming up to 450 DEG C, be incubated 10～50 minutes, then be warming up to 560 600 DEG C, is incubated 30～60 minutes；C, use air-cooled rapid cooling, make iron core temperature be down to 300 DEG C, terminate to be down to less than 300 DEG C to iron core temperature from insulation, control within 45 minutes；D, iron core carries out loading after shaping mould, put into the paint vehicle prepared together, carry out vacuum paint dipping so that it is hardening；E, to hardening after iron core cut along symmetrical center line, it is ensured that otch flat smooth, iron core is without discrete piece, impulse-free robustness；F, test and encapsulate.Present invention process method is simple, improves Technology for Heating Processing and increases the step of dipping lacquer, can realize the iron core of low-cost and high-performance, and effect is fairly obvious.
Description
Technical field
The invention belongs to electronic devices and components design and shipbuilding field, relate to a kind of ultracrystallite cutting iron core, be particularly well-suited to the transformer of open-close type.
Background technology
Open-close type transformer typically use silicon strip to roll iron core is cleaved forms, but silicon steel performance is relatively low causes transformer precision relatively low, can only make inferior grade open-close type transformer；Permalloy material iron core typically used by high-grade open-close type transformer, but relatively costly.Microcrystalline iron core has the highest magnetic property, uses Superfine crystal material cutting iron core can be greatly improved the precision of open-close type transformer, enhances product performance, reduce cost.
Summary of the invention
The present invention is to solve transformer iron core degraded performance in prior art, relatively costly technical problem, devise the ultracrystallite cutting iron core of a kind of open-close type transformer, by the improvement to its production Technology, the precision of transformer while reducing cost, can be improved.
The technical solution used in the present invention is, the production technology of the ultracrystallite cutting iron core of a kind of open-close type transformer, and the step of described production technology includes:
A, ultracrystallite band is put it is wound into iron core on the winder, and spot welding is firm；
B, being heat-treated by above-mentioned iron core, heat treatment process uses temperature-gradient method mode, is first warming up to 380 DEG C, is incubated 10～50 minutes, then is warming up to 450 DEG C, be incubated 10～50 minutes, then be warming up to 560-600 DEG C, is incubated 30～60 minutes；
C, use air-cooled rapid cooling, make iron core temperature be down to 300 DEG C, terminate to be down to less than 300 DEG C to iron core temperature from insulation, control within 45 minutes；
D, iron core carries out loading after shaping mould, put into the bicomponent epoxy resin paint prepared together, carry out vacuum paint dipping so that it is hardening；
E, to hardening after iron core cut along symmetrical center line, it is ensured that otch flat smooth, iron core is without discrete piece, impulse-free robustness；
F, test and encapsulate.
Described a step ultracrystallite band iron core chooses GB trade mark 1K107 or 1K107B material.
12 zones of different monitoring temperature, 6 temperature controls, it is ensured that whole furnace temperature uniformity and iron core consistency of performance are used when described b step is heat-treated.
In described bicomponent epoxy resin paint, each component fraction scale by weight is E82X portions of resin curing agent: acetone=2: (1～1.5): (9～11).
The present invention's it is crucial that selected material and Technology for Heating Processing are simple, 1K107 or 1K107B material is favorably improved the precision of open-close type transformer.Lead at the beginning of ferrite as leading as 1000Gs/Oe at the beginning of 2000Gs/Oe, silicon steel；And leading at the beginning of ultracrystallite is 4 × 104～8 × 104Gs/Oe, the initial magnetic permeability of ferrite and silicon steel sheet is all well below Superfine crystal material, Superfine crystal material cost is more much lower than permalloy again, and Superfine crystal material the most still has higher initial magnetic permeability, can meet the problem that open-close type transformer precision is not enough.
The invention has the beneficial effects as follows, process is simple, on the basis of original technique, it is only necessary to improving Technology for Heating Processing and increase the step of dipping lacquer, can realize the iron core of low-cost and high-performance, effect is fairly obvious.
Detailed description of the invention
A kind of production technology of the ultracrystallite cutting iron core of open-close type transformer, it is important to: the step of described production technology includes:
A, ultracrystallite band iron core is put it is wound into iron core on the winder, and spot welding is firm；
B, being heat-treated by above-mentioned iron core, heat treatment process uses temperature-gradient method mode, is first warming up to 380 DEG C, is incubated 10～50 minutes, then is warming up to 450 DEG C, be incubated 10～50 minutes, then be warming up to 560-600 DEG C, is incubated 30～60 minutes；
C, use air-cooled rapid cooling, make iron core temperature be down to 300 DEG C, terminate to be down to less than 300 DEG C to iron core temperature from insulation, control within 45 minutes；
D, iron core carries out loading after shaping mould, put into the bicomponent epoxy resin paint prepared together, carry out vacuum paint dipping so that it is hardening；
E, to hardening after iron core cut along symmetrical center line, it is ensured that otch flat smooth, iron core is without discrete piece, impulse-free robustness；
F, test and encapsulate.
Described a step ultracrystallite band iron core chooses GB trade mark 1K107 or 1K107B material.
12 zones of different monitoring temperature, 6 temperature controls, it is ensured that whole furnace temperature uniformity and iron core consistency of performance are used when described b step is heat-treated.
In described bicomponent epoxy resin paint, each component fraction scale by weight is E82X portions of resin curing agent: acetone=2: (1～1.5): (9～11).
The present invention in the specific implementation, first selects GB trade mark 1K107 or 1K107B material band, and after being wound to regulation shape and size on the winder, spot welding is firm, it is desirable to winding is closely, smooth with flat-plate compressed, generally circular in shape or rectangle.
Curing agent is the one in vinyl triamine, DACH, di-2-ethylhexylphosphine oxide hexamethylene alkanamine, triethylene tetramine, TEPA.
Then winding iron core is heat-treated, heat treatment process uses temperature-gradient method mode, it was incubated with 10 minutes-50 minutes respectively at 380 DEG C and 450 DEG C, then is warming up to 560-600 DEG C, be incubated 30-60 minute, air-cooled rapid cooling is used after end, after within making iron core temperature be down to 300 DEG C, terminate cooling, during heat treatment, use 12 zones of different monitoring temperature, 6 temperature controls, it is ensured that whole furnace temperature uniformity and iron core consistency of performance.
Heat treatment carries out shaping to iron core after completing, and loads mould and puts into the paint vehicle prepared, carry out vacuum paint dipping after shaping.Through shaping and band mould dipping lacquer, iron core ensures that change in shape is little, make follow-up cutting profile complete, be of the required size.
Using particular manufacturing craft to cut as requested, ensure otch flat smooth after cutting, iron core is without the defect such as discrete piece, burr.
Finally carry out testing go-on-go and encapsulation.
Microcrystalline iron core after heat treatment, carries out dipping lacquer hardening, to cutting after hardening.Otch to keep smooth, smooth, to reduce performance loss.The magnetic conductivity of Superfine crystal material own is higher, and therefore, ultracrystallite cutting iron core performance is better than silicon steel cutting iron core, can be applicable to the open-close type transformer of degree of precision, and cost is less than the permalloy iron core of high accuracy grade.
Table 1
Can be seen that from table 1 above, either initial magnetic permeability, maximum permeability, saturation induction density, or density and Curie temperature, the performance of microcrystalline iron core is all superior to silicon steel core and the permalloy iron core of prior art, and this effect just demonstrating the present invention is the most significant.
Claims (2)
1. the production technology of the ultracrystallite cutting iron core of an open-close type transformer, it is characterised in that:
The step of described production technology includes:
A, ultracrystallite band is put it is wound into iron core on the winder, and spot welding is firm, described ultra micro
Crystal zone material iron core chooses GB trade mark 1K107 or 1K107B material；
B, being heat-treated by above-mentioned iron core, heat treatment process uses temperature-gradient method mode, first heats up
To 380 DEG C, it is incubated 10～50 minutes, then is warming up to 450 DEG C, be incubated 10～50 minutes, then be warming up to
560-600 DEG C, it is incubated 30～60 minutes；
C, use air-cooled rapid cooling, make iron core temperature be down to 300 DEG C, terminate to iron core temperature from insulation
Degree is down to 300 DEG C, controls within 45 minutes；
D, iron core carries out loading after shaping mould, put into the bicomponent epoxy resin paint prepared together
In, carry out vacuum paint dipping so that it is hardening, in described bicomponent epoxy resin paint, each component is by weight
Fraction scale is E82X resin: curing agent: acetone=2:(1～1.5): (9～11), described solidification
Agent is vinyl triamine, DACH, di-2-ethylhexylphosphine oxide hexamethylene alkanamine, triethylene tetramine, tetrem
One in alkene five amine；
E, to hardening after iron core cut along symmetrical center line, it is ensured that otch flat smooth, iron core
Without discrete piece, impulse-free robustness；
F, test and encapsulate.
The life of the ultracrystallite cutting iron core of a kind of open-close type transformer the most according to claim 1
Production. art, it is characterised in that: use 12 zones of different monitoring temperature when described b step is heat-treated,
6 temperature controls, it is ensured that whole furnace temperature uniformity and iron core consistency of performance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310325209.0A CN103390492B (en) | 2013-07-31 | 2013-07-31 | A kind of production technology of the ultracrystallite cutting iron core of open-close type transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310325209.0A CN103390492B (en) | 2013-07-31 | 2013-07-31 | A kind of production technology of the ultracrystallite cutting iron core of open-close type transformer |
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| Publication Number | Publication Date |
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| CN103390492A CN103390492A (en) | 2013-11-13 |
| CN103390492B true CN103390492B (en) | 2016-08-31 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451071B (en) * | 2014-11-13 | 2016-09-28 | 北京冶科磁性材料有限公司 | A kind of heat treatment method of low-loss medium-high frequency iron based nano crystal transformer core |
| CN106128747B (en) * | 2016-08-26 | 2019-03-15 | 广东工业大学 | A kind of heat treatment method and system preparing high-performance iron Based Nanocrystalline Alloys magnetic core |
| CN108364776B (en) * | 2018-03-15 | 2020-09-08 | 河北申科电子股份有限公司 | Solidification production process of ultracrystalline magnetic core for current transformer |
| CN109285686B (en) * | 2018-08-22 | 2021-01-19 | 横店集团东磁股份有限公司 | Production method for cutting magnetic core |
| CN109178497A (en) * | 2018-10-12 | 2019-01-11 | 上海劲兆互感器有限公司 | A kind of c-type iron core bonding packaging method |
| CN110993308B (en) * | 2019-12-23 | 2021-09-24 | 无锡德盛互感器有限公司 | Manufacturing process of transformer iron core |
| CN111341545B (en) * | 2020-03-23 | 2021-09-14 | 大连北方互感器集团有限公司 | Manufacturing process of transformer iron core |
| CN113470964A (en) * | 2021-08-17 | 2021-10-01 | 安徽先锐软磁科技有限公司 | Solidification production process of ultracrystalline iron core for current transformer |
| CN113990597A (en) * | 2021-10-19 | 2022-01-28 | 河北申科磁性材料有限公司 | Strip, high initial permeability amorphous nanocrystalline alloy, magnetic core and open-ended transformer |
| CN113990650B (en) * | 2021-10-19 | 2023-03-31 | 河北申科磁性材料有限公司 | High-permeability open transformer magnetic core and processing technology thereof and open transformer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5611871A (en) * | 1994-07-20 | 1997-03-18 | Hitachi Metals, Ltd. | Method of producing nanocrystalline alloy having high permeability |
| CN1185012A (en) * | 1996-12-11 | 1998-06-17 | 梅加日公司 | Process for mfg. magnetic component made of iron-based soft magnetic alloy having nanocrys talline structure |
| CN1257937A (en) * | 1999-12-14 | 2000-06-28 | 石松耀 | Nm-class crystal alloy-iron core for precise current transformer and its making method |
| CN101118806A (en) * | 2007-07-05 | 2008-02-06 | 上海安泰至高非晶金属有限公司 | Amorphous ultracrystallite iron core manufacturing method |
| CN101993986A (en) * | 2009-08-14 | 2011-03-30 | 上海日港置信非晶体金属有限公司 | Heat treatment method and device of amorphous alloy cores |
| CN102363830A (en) * | 2011-10-26 | 2012-02-29 | 青岛云路新能源科技有限公司 | Heat treatment method for ultracrystalline magnetic core |
-
2013
- 2013-07-31 CN CN201310325209.0A patent/CN103390492B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5611871A (en) * | 1994-07-20 | 1997-03-18 | Hitachi Metals, Ltd. | Method of producing nanocrystalline alloy having high permeability |
| CN1185012A (en) * | 1996-12-11 | 1998-06-17 | 梅加日公司 | Process for mfg. magnetic component made of iron-based soft magnetic alloy having nanocrys talline structure |
| CN1257937A (en) * | 1999-12-14 | 2000-06-28 | 石松耀 | Nm-class crystal alloy-iron core for precise current transformer and its making method |
| CN101118806A (en) * | 2007-07-05 | 2008-02-06 | 上海安泰至高非晶金属有限公司 | Amorphous ultracrystallite iron core manufacturing method |
| CN101993986A (en) * | 2009-08-14 | 2011-03-30 | 上海日港置信非晶体金属有限公司 | Heat treatment method and device of amorphous alloy cores |
| CN102363830A (en) * | 2011-10-26 | 2012-02-29 | 青岛云路新能源科技有限公司 | Heat treatment method for ultracrystalline magnetic core |
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Effective date of registration: 20170913 Address after: 052360 Hebei Province, Xinji City Cang Xin transit road machinery accessories market Patentee after: HEBEI SHENKE ELECTRIC POWER CO.,LTD. Address before: 052360 Hebei city in Shijiazhuang Province, Xinji City Industrial Zone No. 9 East Street Office Patentee before: HEBEI SHENKE ELECTRONICS Co.,Ltd. |
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Denomination of invention: A production process of ultramicrocrystalline cutting iron core for opening and closing transformer Effective date of registration: 20220505 Granted publication date: 20160831 Pledgee: China Construction Bank Corporation Xinji sub branch Pledgor: HEBEI SHENKE ELECTRONICS Co.,Ltd.|Hebei Shenke mould Co.,Ltd.|Hebei Shenke magnetic materials Co.,Ltd.|Shenke Technology Group Co.,Ltd.|Hebei Shenke Intelligent Manufacturing Co.,Ltd.|HEBEI SHENKE ELECTRIC POWER CO.,LTD. Registration number: Y2022130000029 |
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