CN107579628A - A kind of method for manufacturing radial radiation orientation rare-earth permanent magnet ferrite arch magnet - Google Patents
A kind of method for manufacturing radial radiation orientation rare-earth permanent magnet ferrite arch magnet Download PDFInfo
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- CN107579628A CN107579628A CN201710764342.4A CN201710764342A CN107579628A CN 107579628 A CN107579628 A CN 107579628A CN 201710764342 A CN201710764342 A CN 201710764342A CN 107579628 A CN107579628 A CN 107579628A
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- magnet
- arch
- green compact
- rare
- ferrite
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Abstract
The invention discloses a kind of method for manufacturing radial radiation orientation rare-earth permanent magnet ferrite arch magnet, it is as follows that the method comprising the steps of：Green compact each several part when the 1st, rationally designing the shaping of arch magnet shrinks and size；2nd, design mould each several part material and size, produced under external magnetic field during shaping radial oriented；3rd, arch green sintering uses vertical thin dress, and natural shrinking is to being sized in sintering process.The advantage of the invention is that：Radial radiation orientation arch magnet differently- oriented directivity magnetic energy (motor use direction) is bigger by more than 20% than parallel magnetic field oriented moulding magnet magnetic energy, and magnet material utilization rate is high, and cost declines.
Description
Technical field
The present invention relates to permanent magnetic ferrite field, mainly a kind of manufacture radial radiation orientation rare-earth permanent magnet ferrite arch
The method of magnet.
Background technology
This product is mainly used in variable-frequency motor, braking automobile motor and intelligent driving motor etc. and makees permanent-magnet stator, in the past should
Product main body entrance.
This project solves technical barrier：
1st, research is adapted to the high performance material of requirement using rare earth ion displacement manufacture；
2nd, research material characteristic and its it is radially radially oriented in arch magnet when the different of each several part shrink and its rule；
3rd, mould orientation magnetic Circuit Design principle and scheme are studied；
4th, the technology of radial radiation magnet is studied.
The content of the invention
It is main or parallel in shaping that the present invention mainly solves existing direct current generator permanent magnet ferrite arch magnet
Magnetic field orientating, and radial magnetic field need to be used during motor use, magnetic energy loss is big.
It is an object of the invention to overcome the shortcomings of the prior art, and provide a kind of manufacture radial radiation orientation rare earth
The method of permanent magnet ferrite arch magnet.
The purpose of the present invention is completed by following technical solution.This manufacture radial radiation orientation rare-earth permanent magnet
The method of ferrite arch magnet, it is as follows that the method comprising the steps of：
(1) shaping green compact figure, is drafted:Required to determine each side's mill processing capacity according to finished product arch magnet drawing and user, then
Corresponding to green compact size is：(finished figure paper size+mill processing capacity) × shrinkage ratio=green compact correspondingly-sized, shrinkage ratio：Length and width is
1.1-1.2 radian direction is 1.2-1.3；
(2), mould：Upper mould uses full permeability magnetic material, and lower mould includes lower mould not permeable section and lower die guiding magnetic part,
Lower mould not permeable section mounting on the surface of lower die guiding magnetic part, lower mould not the shape of permeable section and green compact match and with
Green compact mutually crimp, and are produced under external magnetic field during shaping radial oriented；
(3), during green sintering, using standing up loose arrangement, natural shrinking is to design size after sintering.
Further, part Sr ions in permanent-magnet ferrite are replaced using rare-earth elements La, generates rare-earth permanent magnet oxygen
Body material.
Beneficial effects of the present invention are：Magnetic parameter is high, radial radiation orientation magnet magnetic direction in motor use
Consistent with use direction, magnetic energy makes full use of；Radial radiation orientation arch magnet differently- oriented directivity magnetic energy (motor use direction) ratio
Parallel magnetic field oriented moulding magnet magnetic energy is big by more than 20%, and magnet material utilization rate is high, and cost declines.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is lower mould of the invention not permeable section structural representation.
Description of reference numerals：Press top shoe 1, upper mould suction eye 2, upper mould 3, green compact 4, lower mould not permeable section 5, lower mould
Permeable section 6, press sliding block 7, shaping alignment magnetic field distribution 8.
Embodiment
Detailed introduction is done to the present invention below in conjunction with accompanying drawing：
As shown in figure 1, the method for this manufacture radial radiation orientation rare-earth permanent magnet ferrite arch magnet, motor is radially
Radially oriented rare-earth permanent magnet ferrite arch magnet, part Sr ions in permanent-magnet ferrite, generation are replaced using rare-earth elements La
Rare earth permanent ferrite material.It is as follows that the method comprising the steps of：
(1) shaping green compact figure, is drafted:Required to determine each side's mill processing capacity according to finished product arch magnet drawing and user, then
Corresponding to the size of green compact 4 is：(finished figure paper size+mill processing capacity) × shrinkage ratio=green compact correspondingly-sized；Its length, width
Shrinkage ratio selects according to arch magnet center of circle angle size between 1.1-1.2.Inner arc, the shrinkage ratio of outer arc are in 1.2-1.3
Between choose.(shrinkage ratio=green compact size/blank dimension).
(2), mould：For upper mould 3 using full permeability magnetic material (A3 or DT materials), lower mould includes lower mould not permeable section 5
With lower die guiding magnetic part 6, permeable section 5 does not splice on the surface of lower die guiding magnetic part 6 lower mould, lower mould not permeable section 5
Shape matches with green compact 4 and crimped with the phase of green compact 4, is produced under external magnetic field during shaping radial oriented；((note：Conventional mould
Have upper and lower mould and be all permeability magnetic material)
As shown in Fig. 2 a, 2a, 3a region in figure are designed as non-magnet_conductible material, remaining is permeability magnetic material.
(3) when, green compact 4 sinter, using standing up loose arrangement, natural shrinking is to design size after sintering.When blank is ground off
The mill processing capacity of design, product reach user's drawing requirement.
Embodiment：
Certain arch magnet, its size (mm)：
CW (arch) 36.37 (outer arc radius) × 26.82 (interior arc radius) × 49.5 (axial length) × 67.3 (chord width) ×
26.3 (sagitta) × 9.5 (arch is thick) × 136 ° (central angles).
Design radially inner and outer arc and be punctured into 1.25, length and width direction shrinks 1.145, then green compact size is：
CW45.5×33.5×56.7×77°×8.9×12×136°
Lower mould size：A=1.5,2a=3,3a=5
Green compact are using a cube thin dress arrangement dress base, 1125 DEG C of oxidizing atmosphere sintering in 45 meters of rolling tunnel kilns.Through mill processing, inspection
Survey, reach the radial radiation orientation arch magnet requirement of application claims.
This product material carries out crystal grain orientation in shaping, by coil, and outer arc direction orientation generates high-performance in manufacture, often
Rule technology is that parallel magnetic field is directly logical.The present invention is that lower die face inlays one layer of non-magnet_conductible material (permeability is 1), upper mould and lower mould its
Remaining part is divided into permeability magnetic material (permeability 500-1500), and because present invention design changes, magnetic field is radially radial to be taken alignment magnetic field
To distribution.Not magnetic conduction size a, 2a, 3a of the present invention is formed according to magnetic Circuit Design theory innovation.
The present invention realizes radial radiation oriented moulding, and magnet is identical with desired magnetic direction distribution when in use, can fill
Magnetic energy is waved in distribution, and than routine techniques magnet, its magnetic energy improves more than 20%；
It is understood that it will be understood by those skilled in the art that technical scheme and inventive concept are subject to
The protection domain of appended claims of the invention should all be belonged to replacement or change.
Claims (2)
- A kind of 1. method for manufacturing radial radiation orientation rare-earth permanent magnet ferrite arch magnet, it is characterised in that：This method includes Step is as follows：(1) shaping green compact figure, is drafted:Required to determine each side's mill processing capacity according to finished product arch magnet drawing and user, then corresponded to Green compact (4) size is：(finished figure paper size+mill processing capacity) × shrinkage ratio=green compact correspondingly-sized, shrinkage ratio：Length and width is 1.1-1.2 radian direction is 1.2-1.3；(2), mould：Upper mould (3) uses full permeability magnetic material, and lower mould includes lower mould not permeable section (5) and lower die guiding magnetic portion Point (6), permeable section (5) mounting is not on the surface of lower die guiding magnetic part (6) for lower mould, the shape of lower mould not permeable section (5) Match with green compact (4) and mutually crimped with green compact (4), produced under external magnetic field during shaping radial oriented；(3) when, green compact (4) sinter, using standing up loose arrangement, natural shrinking is to design size after sintering.
- 2. the method for manufacture radial radiation orientation rare-earth permanent magnet ferrite arch magnet according to claim 1, its feature It is：Part Sr ions in permanent-magnet ferrite are replaced using rare-earth elements La, generate rare earth permanent ferrite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710764342.4A CN107579628A (en) | 2017-08-30 | 2017-08-30 | A kind of method for manufacturing radial radiation orientation rare-earth permanent magnet ferrite arch magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710764342.4A CN107579628A (en) | 2017-08-30 | 2017-08-30 | A kind of method for manufacturing radial radiation orientation rare-earth permanent magnet ferrite arch magnet |
Publications (1)
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|---|---|
| CN107579628A true CN107579628A (en) | 2018-01-12 |
Family
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Family Applications (1)
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|---|---|---|---|
| CN201710764342.4A Pending CN107579628A (en) | 2017-08-30 | 2017-08-30 | A kind of method for manufacturing radial radiation orientation rare-earth permanent magnet ferrite arch magnet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759718A (en) * | 2019-11-26 | 2020-02-07 | 中国电子科技集团公司第四十三研究所 | Preparation method of arched flaky dielectric material and flexural voltage electric composite material |
| JP2020113578A (en) * | 2019-01-08 | 2020-07-27 | 大同特殊鋼株式会社 | Mold and method for forming magnet material |
| CN112600318A (en) * | 2020-12-22 | 2021-04-02 | 湖南航天磁电有限责任公司 | Ferrite product capable of reducing motor tooth space torque and forming die thereof |
| EP3834961A1 (en) | 2019-12-13 | 2021-06-16 | Yantai Shougang Magnetic Materials Inc. | A radiation-oriented sintered arc-shaped nd-fe-b magnet, a manufacturing method thereof, and a corresponding manufacturing device |
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| JP2020113578A (en) * | 2019-01-08 | 2020-07-27 | 大同特殊鋼株式会社 | Mold and method for forming magnet material |
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| EP3834961A1 (en) | 2019-12-13 | 2021-06-16 | Yantai Shougang Magnetic Materials Inc. | A radiation-oriented sintered arc-shaped nd-fe-b magnet, a manufacturing method thereof, and a corresponding manufacturing device |
| CN112600318A (en) * | 2020-12-22 | 2021-04-02 | 湖南航天磁电有限责任公司 | Ferrite product capable of reducing motor tooth space torque and forming die thereof |
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Application publication date: 20180112 |