CN103240416B - Method and mould for manufacturing NeFeB (Neodymium iron boron) radiation-orientated ring magnet - Google Patents
Method and mould for manufacturing NeFeB (Neodymium iron boron) radiation-orientated ring magnet Download PDFInfo
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- CN103240416B CN103240416B CN201310160255.XA CN201310160255A CN103240416B CN 103240416 B CN103240416 B CN 103240416B CN 201310160255 A CN201310160255 A CN 201310160255A CN 103240416 B CN103240416 B CN 103240416B
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Abstract
The invention provides a method and a mould for manufacturing an NdFeB (Neodymium iron boron) radiation-orientated ring magnet. The mould comprises a mould body made of non-magnetic steel. Magnetic side panels are respectively arranged on two sides of the mould body. A magnetic silicon steel piece of a fan-type radiation shape with the central angle of 90 degrees is arranged between the magnetic side panels inside the mould body. A tile-shaped mould cavity is arranged in the middle of the magnetic silicon steel piece. NdFeB magnetic powder is filled inside the tile-shaped mould cavity. Substituting for a regular NdFeB multipolar magnetic ring spliced by magnetic tiles, the NdFeB radiation-orientated ring magnet is applied to a rotator which is a part of the motor, and overall performances of a servo motor system are greatly improved.
Description
Technical field
The invention belongs to magnetic Nd-Fe-B ring field, specifically a kind of method and mould thereof manufacturing the radially oriented ring magnet of neodymium iron boron.
Background technology
Along with the development of national economy and low-carbon environment-friendly economy, the every field of social development is also improving constantly the requirement of automaticity, and this servo electrical machinery system role in social development process making accurately to control as distinguishing feature is also important all the more.This type systematic is applied extremely wide in lathe, printing equipment, packaging facilities, Weaving device, rubber and plastic, electronic semi-conductor and wind-powered electricity generation solar energy etc.At present, the servomotor market share of these industries more than 50% mainly by with Japan and Korea S with American-Europeanly to occupy for the foreign capitals brand of representative, domestic brand overall market share is less, also has larger gap technically, in some high-end applications field, even many decades will be fallen behind.Current, the neodymium iron boron multi-pole magnet-ring that domestic servo electrical machinery system generally uses magnetic shoe assembled, with binding agent, magnet steel is connected with body, thus the intensity of binding agent and life-span seriously limit the useful life of motor, when permanent magnet is as rotor, due to the effect of centrifugal force, make this problem particularly outstanding; Secondly, the thickness because of bonding agent is comparatively difficult to control, and directly has influence on the gap of motor stator and rotor, reduces the efficiency of motor to a certain extent; In addition, due to the difference in each magnetic shoe performance, the performance indications such as the stationarity of the running of motor are all made a big impact.In a word, the way adopting multi-disc magnetic shoe to splice in magneto can bring a series of, be difficult to the unfavorable factor that overcomes.Other application, as magnetic suspension bearing etc., also also exists similar problem.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of method and the mould thereof that manufacture the radially oriented ring magnet of neodymium iron boron.
A kind of mould manufacturing the radially oriented ring magnet of neodymium iron boron, it is characterized in that it comprises the die body be made up of nonmagnetic steel, magnetic conduction side plate is respectively arranged with in the both sides of described die body, the magnetic conduction silicon steel sheet that central angle is the fan beam shape of 90 ° is provided with between the inner magnetic conduction side plate of described die body, be provided with a watt shape die cavity in the middle of magnetic conduction silicon steel sheet, watt shape mold cavity fills NdFeB magnetic powder.
Described a kind of mould manufacturing the radially oriented ring magnet of neodymium iron boron, is characterized in that four angles of die body are respectively arranged with patrix locating hole.
The method of the radially oriented ring magnet of described Making mold neodymium iron boron, comprise batching, powder process, die mould, sintering, mach step, it is characterized in that the method adopting orientation die mould and post forming in the step of die mould, first orientation die mould is carried out, described mould is used to suppress four in 90 degree of radially oriented tiles, during orientation die mould, magnetic field forms magnetic loop along the NdFeB magnetic powder-magnetic conduction silicon steel sheet-magnetic conduction side plate-cartridge of cartridge-magnetic conduction side plate-magnetic conduction silicon steel sheet-watt shape mould filling, then post forming is carried out, henry chloranthus herb sheet is put into round rubber mould, insert cylindrical iron to reinstall vacuum bag and vacuumize sealing, a radiation ring blank is assembled into through isostatic pressed, then take out cylindrical iron to enter sintering furnace and sinter.
A kind of method manufacturing the radially oriented ring magnet of neodymium iron boron of the present invention, provide a kind of method of producing the neodymium iron boron multi-pole magnet-ring of sinter molding, substitute the neodymium iron boron multi-pole magnet-ring that conventional magnetic shoe is assembled, be applied to rotor, make motor, substantially increase the combination property of servo electrical machinery system.The neodymium iron boron multi-pole magnet-ring of the sinter molding that the method is produced, compared with the neodymium iron boron multi-pole magnet-ring using magnetic shoe assembled at present, has the following advantages:
First with regard to production cost Comparatively speaking, and shaping sintered NdFeB multi-pole magnet-ring has obvious cost advantage, because assembled neodymium iron boron multi-pole magnet-ring generally all adopts square Linear cut to become tile, then carries out the fine finishining such as inner circle cylindrical grinding mill.The waste large percentage of the waste leftover material cut down, causes expensive rare earth resources waste.And the cost of linear cutter expense is also very high.And one-time formed sintered NdFeB multi-pole magnet-ring blank, do not need Linear cut only to need inner circle cylindrical grinding to grind and can complete fine finishining, the waste of Linear cut leftover pieces can not be caused.
Comparatively watt spelling both rings uniformity of radiation difference is obvious for the sintered NdFeB multi-pole magnet-ring of the second sinter molding, one-time formed sintered NdFeB multi-pole magnet-ring is radially oriented in 360 degree after forming in 90 degree of homogeneous radiation magnetic shoes by four pieces, there is not the radiation zone of intersection and dead angle, and assembled watt is more at most more close to the effect that radiation is magnetized by assembled quantity, 360 degree not on practical significance radially oriented, there is certain radiation zone of intersection and dead angle
3rd.Comparatively watt spelling both rings performance gap is obvious for the sintered NdFeB multi-pole magnet-ring of sinter molding, one-time formed sintered NdFeB multi-pole magnet-ring surface magnetic flux distribution is near sinusoidal waveform, magnetic pole maximum table magnetic is higher than watt spelling ring, and a watt spelling ring surface magnetic flux distribution is approximate trapezoid ripple, magnetic pole maximum table magnetic is then starkly lower than one-time formed sintered NdFeB multi-pole magnet-ring.
Accompanying drawing explanation
Fig. 1 is mould schematic diagram of the present invention;
In figure, 1-magnetic conduction side plate; 2-nonmagnetic steel; 3-watt shape die cavity; 4-magnetic conduction silicon steel sheet; 5-ferro-cobalt; 6-patrix locating hole.
Detailed description of the invention
As shown in Figure 1, mould of the present invention has special magnetic Circuit Design, magnetic conduction side plate is respectively arranged with in the both sides of described die body, the magnetic conduction silicon steel sheet that central angle is the fan beam shape of 90 ° is provided with between the inner magnetic conduction side plate of described die body, again with poured with epoxy resin sizing, middle die cavity is tiles and fills NdFeB magnetic powder, and watt shape die cavity both sides adopt nonmagnetic steel material, nonmagnetic steel material can not be magnetized and can not intercept the magnetic line of force, and contributes to being uniformly distributed of the radial magnetic line of force.When moulding press orientation die mould, magnetic field forms magnetic loop along NdFeB magnetic powder (magnetic is that 90 degree of radial formation magnetic loop carry out the orientation)-magnetic conduction silicon steel sheet-magnetic conduction side plate-cartridge of cartridge-magnetic conduction side plate-magnetic conduction silicon steel sheet-centre watt shape mould filling.
Magnetic aligning of the present invention is that the preparation process of radial annular magnet comprises batching, powder process, orientation die mould, sintering, machined; Wherein when orientation die mould, magnetic field forms magnetic loop along NdFeB magnetic powder (magnetic is that 90 degree of radial formation magnetic loop carry out the orientation)-magnetic conduction silicon steel sheet-magnetic conduction side plate-cartridge of cartridge-magnetic conduction side plate-magnetic conduction silicon steel sheet-centre watt shape mould filling.Detailed description of the invention is the punch combination of former by mould and mould, middle in tile-type shape mould filling NdFeB magnetic powder, tile-type patrix being put into (four locating holes play guide-localization effect) above mould puts in the middle of the cartridge of press together again by mould, by under upper cylinder half, reorientation is suppressed, again on upper cylinder half, take out mould, take off patrix and open matched molds and take off compressing tile blank.Repeat above-mentioned action again, do four tiles.Adopt the method for post forming, henry chloranthus herb sheet puts into round rubber mould, and circle center is inserted cylindrical iron and reinstalled vacuum bag and vacuumize sealing, has namely been assembled into a radiation ring blank through isostatic pressed.Carry out the fine finishining such as flat stone mill, peripheral milling, inner circle mill again.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., be all included within protection scope of the present invention.
Claims (2)
1. one kind uses the method for the radially oriented ring magnet of Making mold neodymium iron boron, comprise batching, powder process, die mould, sintering, mach step, it is characterized in that described mould comprises the die body be made up of nonmagnetic steel, magnetic conduction side plate is respectively arranged with in the both sides of described die body, the magnetic conduction silicon steel sheet that central angle is the fan beam shape of 90 ° is provided with between the inner magnetic conduction side plate of described die body, a watt shape die cavity is provided with in the middle of magnetic conduction silicon steel sheet, watt shape mold cavity fills NdFeB magnetic powder, described method adopts the method for orientation die mould and post forming in the step of die mould, first orientation die mould is carried out, described mould is used to suppress four in 90 degree of radially oriented tiles, during orientation die mould, magnetic field forms magnetic loop along the NdFeB magnetic powder-magnetic conduction silicon steel sheet-magnetic conduction side plate-cartridge of cartridge-magnetic conduction side plate-magnetic conduction silicon steel sheet-watt shape mould filling, then post forming is carried out, henry chloranthus herb sheet is put into round rubber mould, insert cylindrical iron to reinstall vacuum bag and vacuumize sealing, a radiation ring blank is assembled into through isostatic pressed, then take out cylindrical iron to enter sintering furnace and sinter.
2. a kind of method using the radially oriented ring magnet of Making mold neodymium iron boron as claimed in claim 1, is characterized in that four angles of die body are respectively arranged with patrix locating hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310160255.XA CN103240416B (en) | 2013-05-03 | 2013-05-03 | Method and mould for manufacturing NeFeB (Neodymium iron boron) radiation-orientated ring magnet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310160255.XA CN103240416B (en) | 2013-05-03 | 2013-05-03 | Method and mould for manufacturing NeFeB (Neodymium iron boron) radiation-orientated ring magnet |
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| CN103240416A CN103240416A (en) | 2013-08-14 |
| CN103240416B true CN103240416B (en) | 2015-01-14 |
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| CN201310160255.XA Active CN103240416B (en) | 2013-05-03 | 2013-05-03 | Method and mould for manufacturing NeFeB (Neodymium iron boron) radiation-orientated ring magnet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063037B (en) * | 2016-11-07 | 2021-06-29 | 北京中科三环高技术股份有限公司 | Multi-pole magnetic ring of anisotropic bonded neodymium iron boron and preparation method thereof |
| CN109887703B (en) * | 2018-12-04 | 2023-08-15 | 杭州史宾纳科技有限公司 | NdFeB (neodymium iron boron) orientation device of square wave magnetic ring |
| JP2020113578A (en) * | 2019-01-08 | 2020-07-27 | 大同特殊鋼株式会社 | Mold and method for forming magnet material |
| CN114843062A (en) * | 2022-04-15 | 2022-08-02 | 中钢天源股份有限公司 | Preparation method of radial orientation multi-pole magnetic ring, magnetic ring mold and magnetic ring |
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| CN100513124C (en) * | 2001-07-26 | 2009-07-15 | 株式会社普利司通 | Method for manufacturing magnet roller |
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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 |
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| CN103240416A (en) | 2013-08-14 |
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Denomination of invention: A method for manufacturing NdFeB radiation oriented ring magnet and its mold Effective date of registration: 20221127 Granted publication date: 20150114 Pledgee: ZHEJIANG DONGYANG RURAL COMMERCIAL BANK Co.,Ltd. Pledgor: ZHEJIANG ZHONGYUAN MAGNETIC MATERIAL CO.,LTD. Registration number: Y2022330003219 |