CN104637647A - Minitype neodymium iron boron permanent magnet batch magnetizing method and device - Google Patents
Minitype neodymium iron boron permanent magnet batch magnetizing method and device Download PDFInfo
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- CN104637647A CN104637647A CN201310564145.XA CN201310564145A CN104637647A CN 104637647 A CN104637647 A CN 104637647A CN 201310564145 A CN201310564145 A CN 201310564145A CN 104637647 A CN104637647 A CN 104637647A
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Abstract
The invention provides a minitype neodymium iron boron permanent magnet batch magnetizing method. The method is characterized by comprising the following steps that a, products to be magnetized are freely placed into trays, and the geometrical shapes of the products to be magnetized in the magnetizing orientation direction are asymmetric; b, the trays are placed into a vibration magnetic field coil; c, the trays are shaken, and the products to be magnetized are rearranged in the easily-magnetizing direction; d, the products in different directions are picked out; e, the multiple trays are stacked and are jointly placed into a saturation magnetizing coil for magnetization. According to the minitype neodymium iron boron permanent batch magnetizing method and device, the minitype neodymium iron boron geometrically-asymmetric products in the orientation direction can be magnetized in batches, the efficiency of the method is 15 times that of a traditional method, batch production and supply can be achieved, the error rate is low, and defective products can be easily found.
Description
Technical field
The present invention relates to Nd-Fe-B permanent magnet to magnetize technical field, especially, relate to a kind of miniature Nd-Fe-B permanent magnet batch magnetization method and device.
Background technology
Finally make at rare earth Sintered NdFeB magnet---in the process magnetized, for the minor items of the asymmetric shape of geometry, trapezoidal product as shown in Figure 1, this minor items full-size is at 1-5mm, and weight is at 1-2g.Its special feature is will by product, according to the polar orientation of regulation, be placed in magnetizing coil magnetic field, with obtain expection magnetic effect.As shown in Figure 2 A, be the mode of discharging after product saturation magnetization and order.
Realize the magnetization method of minor items as shown in Figure 1, conventional method of operation has three kinds:
One is by manually, is well placed in same for shape of product direction, is arranged in a row, and with packaging material, such as paper or Polypropylence Sheet etc. are wrapped, and put into magnetizing coil, and with N, S extreme direction of magnetizing coil field, consistent with product requirement.The method of this routine, for the product that volume profiles is larger, is to realize batch jobs, but for full-size at 1-5mm, weight, at the microminiaturized product of 1-2g, is manually put and is just very not easily realized, and cannot realize batch and magnetize.
Two is if by all miscellaneous goods that will magnetize, disregard wrapping up dispersedly of direction, put into magnetizing coil, direction after magnetizing can because geometry asymmetric, make the direction of N, S pole have plenty of mistake, with customer requirement just in time contrary (as shown in Figure 2 B).And can because magnetize middle generation reversing impact, the quality problems such as the shock between product produces defect of colliding with, and coating is damaged.
The third method, only with taking up frock, product is spread, hand picking afterwards goes out the product different from magnetizing direction, remaining satisfactory product, carry out saturation magnetization, although the batch that this method can realize the asymmetric magnet of miniature orientation magnetizes, but efficiency slowly, and manually sort direction and be easy to occur mistake, the defective products producing the opposite way round after causing saturation magnetization not easily finds and sorts out.
Summary of the invention
The object of the invention is to propose one to miniature Nd-Fe-B permanent magnet batch magnetization method and device, realize miniature neodymium iron boron magnetizing in enormous quantities along the asymmetric product of direction of orientation geometry.
The present invention proposes a kind of miniature Nd-Fe-B permanent magnet batch magnetization method, it is characterized in that comprising the steps:
A, product to be magnetized arbitrarily is put into pallet, described in product to be magnetized asymmetric along the direction of orientation geometry that magnetizes;
B, described pallet is put into concussion field coil;
C, rock described pallet, described in product to be magnetized rearrange along easy magnetic direction;
D, choose not product in the same way;
E, multiple described pallet is overlapping, jointly put into saturation magnetization coil and magnetize.
Wherein, electric current is frequently handed over by 220 ~ 380V in described concussion field coil.
The present invention also proposes a kind of miniature Nd-Fe-B permanent magnet batch magnetizer, it is characterized in that comprising: concussion field coil, pallet and saturation magnetization coil; Described concussion field coil makes product to be magnetized rearrange along easy magnetic direction; Product to be magnetized described in described pallet takes up; Described saturation magnetization coil is treated the product that magnetizes and is carried out saturation magnetization.
Wherein, described pallet is that multiple overlap is placed.Described pallet is circular or square, and pallet thickness is 1-10mm; With one or more groove in pallet, groove depth exceeds 0.5-2mm than easy the magnetic direction size of product, optimum for exceeding 0.5-1mm.Described pallet is not magnetic conductive material, as polyformaldehyde POM, and polytetrafluoroethylene PTFE, polyvinylchloride, polythene PE or nonmagnetic steel, the materials such as aluminium.
The one that the present invention proposes is to miniature Nd-Fe-B permanent magnet batch magnetization method and device, achieve miniature neodymium iron boron magnetizing in enormous quantities along the asymmetric product of direction of orientation geometry, efficiency is 15 times of conventional method, can realize the batch production supply of material, and error rate is very low, easily find defective products.
Accompanying drawing explanation
Can be further understood by following detailed Description Of The Invention and institute's accompanying drawings about the advantages and spirit of the present invention.
Fig. 1 is trapezoidal miniature Nd-Fe-B permanent magnet structural representation;
Fig. 2 is that trapezoidal miniature Nd-Fe-B permanent magnet magnetizes schematic diagram;
Fig. 3 is that field coil structural representation is shaken in the present invention;
Fig. 4 puts schematic diagram for trapezoidal miniature Nd-Fe-B permanent magnet before magnetizing;
Fig. 5 is that trapezoidal miniature Nd-Fe-B permanent magnet puts process schematic;
Fig. 6 is saturation magnetization schematic diagram of the present invention.
Embodiment
Specific embodiments of the invention are described in detail below in conjunction with accompanying drawing.
Below for trapezoidal miniature Nd-Fe-B permanent magnet, the miniature Nd-Fe-B permanent magnet batch magnetizer of the present invention and method are described.As shown in Figure 3, the present invention's miniature Nd-Fe-B permanent magnet batch magnetizer comprises concussion field coil 1 and pallet 5, and concussion field coil 1 is communicated with mains switch 2.When switching on power 2, in concussion field coil 1, handing over frequently electric current by 220 ~ 380V, a high frequency can be produced exchange concussion magnetic field in earthquake field coil 1 inside, product to be magnetized is rearranged along easy magnetic direction.Pallet 5, for taking up product to be magnetized, is generally multiple overlap and places.Pallet 5 is circular or square, with circular best.Pallet 5 thickness is 1-10mm.In pallet 5, band is fluted, and groove, for holding product to be magnetized, makes it can not run chaotically in pallet and drops.Groove can be a vat, also can be to make multiple sulculus close with product size.Groove depth exceeds 0.5-2mm than easy the magnetic direction size of product, optimum for exceeding 0.5-1mm, makes multiple tray stack added-time product to be magnetized have the space of accommodation.Described pallet is not magnetic conductive material, as polyformaldehyde POM, and polytetrafluoroethylene PTFE, polyvinylchloride, polythene PE or nonmagnetic steel, the materials such as aluminium.Concussion field coil 1, for after mill processing, strips in processing micro-magnetic that ferromagnetism product produces.
Batch magnetization method of the present invention uses concussion electromagnetic field, by the anisotropic properties of sintered NdFeB, under the magneticaction of electromagnetic field, correct magnet along easy magnetic direction arrangement, thus replace manually putting the locality that magnetizes, realize the preparation that batch magnetizes.
The concrete operation method of the present invention's miniature Nd-Fe-B permanent magnet batch magnetization method is:
As shown in Figure 4, first spread and take up in pallet 5 by product to be magnetized, magnet direction of orientation is at random unordered.The direction of product 4, perpendicular to magnetizing direction, is the product needing to correct placing direction.Product 3 is identical with magnetizing direction, and product 6 is contrary with magnetizing direction.Afterwards, pallet 5 is treated magnetic Sintered NdFeB magnet together with being housed in dish, be positioned in concussion field coil 1 (or top), rock gently and take up pallet 5, due to the electromagnetic force in concussion magnetic field air core coil 1, can by anisotropic Sintered NdFeB magnet automatically along rectification position, electromagnetic force line direction, product " automatically " is arranged in as shown in Figure 5A, all be orientated field direction according to magnet, pile up in order in pallet 5.At this time, the product, product 3 and the product 6 that have two kinds of directions of putting along easy magnetic direction is taken up in pallet 5.Again any one in product 3 or product 6 is chosen pallet, make the product placement direction in pallet consistent, as shown in Figure 5 B.Afterwards, several or multiplely take up tray stack and be added together, carry out saturation magnetization in the region of effectively magnetizing being placed on saturation magnetization coil 7, as shown in Figure 6, complete the batch saturation magnetization of sintered NdFeB minor items.The power supply of saturation magnetization coil 7 is that capacitance group connects friendship electric current frequently.
Adopt apparatus of the present invention and method to magnetize, compare as following table with the third method conventional:
| Product full-size (mm) | Product weight (g) | The third fraction defective that magnetizes conventional | Magnetization method fraction defective of the present invention | The third efficiency that magnetizes conventional | The present invention is magnetized efficiency |
| 3.5 | 0.04 | 1350PPM | 7PPM | 20000 slices/day/people | 200000/sky/people |
| 4.5 | 0.5 | 950PPM | 2PPM | 10000 slices/day/people | 170000 slices/day/people |
| 5.1 | 0.7 | 824PPM | 2PPM | 10000 slices/day/people | 150000 slices/day/people |
Of the present invention to miniature Nd-Fe-B permanent magnet batch magnetization method and device, achieve miniature neodymium iron boron magnetizing in enormous quantities along the asymmetric product of direction of orientation geometry, efficiency is 15 times of conventional method, can realize the batch production supply of material, and error rate is very low, easily find defective products.
Just preferred embodiment of the present invention described in this specification, above embodiment is only in order to illustrate technical scheme of the present invention but not limitation of the present invention.All those skilled in the art, all should be within the scope of the present invention under this invention's idea by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (6)
1. a miniature Nd-Fe-B permanent magnet batch magnetization method, is characterized in that comprising the steps:
A, product to be magnetized arbitrarily is put into pallet, described in product to be magnetized asymmetric along the direction of orientation geometry that magnetizes;
B, described pallet is put into concussion field coil;
C, rock described pallet, described in product to be magnetized rearrange along easy magnetic direction;
D, choose not product in the same way;
E, multiple described pallet is overlapping, jointly put into saturation magnetization coil and magnetize.
2. miniature Nd-Fe-B permanent magnet batch magnetization method as claimed in claim 1, is characterized in that handing over electric current frequently by 220 ~ 380V in described concussion field coil.
3. a miniature Nd-Fe-B permanent magnet batch magnetizer, is characterized in that comprising: concussion field coil, pallet and saturation magnetization coil; Described concussion field coil makes product to be magnetized rearrange along easy magnetic direction; Product to be magnetized described in described pallet takes up; Described saturation magnetization coil is treated the product that magnetizes and is carried out saturation magnetization.
4. miniature Nd-Fe-B permanent magnet batch magnetizer as claimed in claim 3, is characterized in that described pallet is that multiple overlap is placed.
5. miniature Nd-Fe-B permanent magnet batch magnetization method as claimed in claim 3, it is characterized in that described pallet is for circular or square, pallet thickness is 1-10mm; With one or more groove in pallet, groove depth exceeds 0.5-2mm than easy the magnetic direction size of product, optimum for exceeding 0.5-1mm.
6. miniature Nd-Fe-B permanent magnet batch magnetization method as claimed in claim 3, is characterized in that described pallet is for not magnetic conductive material, as polyformaldehyde POM, and polytetrafluoroethylene PTFE, polyvinylchloride, polythene PE or nonmagnetic steel, the materials such as aluminium.
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| CN201310564145.XA CN104637647B (en) | 2013-11-14 | 2013-11-14 | Miniature Nd-Fe-B permanent magnet batch magnetization method and device |
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| CN201310564145.XA CN104637647B (en) | 2013-11-14 | 2013-11-14 | Miniature Nd-Fe-B permanent magnet batch magnetization method and device |
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| CN104637647A true CN104637647A (en) | 2015-05-20 |
| CN104637647B CN104637647B (en) | 2018-11-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3661241A (en) * | 1968-12-25 | 1972-05-09 | Benyamin Alexandrovich Ioffe | Apparatus for the simultaneous contactless separation of individual non-magnetic electrically conductive bodies from a continuous flow and orientation thereof |
| DE10025457A1 (en) * | 2000-05-23 | 2001-12-06 | Vacuumschmelze Gmbh | Permanent magnet magnetization device uses oscillation circuit operated at different resonance frequencies before and after point at which maximum energy is stored in magnetization coil |
| DE10247228A1 (en) * | 2002-10-10 | 2004-04-22 | Vacuumschmelze Gmbh & Co. Kg | Method for magnetization of permanent toroidal magnet e.g. for electric motor, involves pair of magnetizing coils each on periphery of toroidal magnet |
| CN101071672A (en) * | 2007-04-17 | 2007-11-14 | 安泰科技股份有限公司 | Magnetizing method for batch small sintered Nd-Fe-B magnet |
| CN201247669Y (en) * | 2008-07-29 | 2009-05-27 | 三环瓦克华（北京）磁性器件有限公司 | Device special used for batch pre-magnetization of small volume permanent magnet |
| CN101533703A (en) * | 2008-11-26 | 2009-09-16 | 宁波同创强磁材料有限公司 | Method for magnetizing medium/small-size Nd-Fe-B magnets |
-
2013
- 2013-11-14 CN CN201310564145.XA patent/CN104637647B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3661241A (en) * | 1968-12-25 | 1972-05-09 | Benyamin Alexandrovich Ioffe | Apparatus for the simultaneous contactless separation of individual non-magnetic electrically conductive bodies from a continuous flow and orientation thereof |
| DE10025457A1 (en) * | 2000-05-23 | 2001-12-06 | Vacuumschmelze Gmbh | Permanent magnet magnetization device uses oscillation circuit operated at different resonance frequencies before and after point at which maximum energy is stored in magnetization coil |
| DE10247228A1 (en) * | 2002-10-10 | 2004-04-22 | Vacuumschmelze Gmbh & Co. Kg | Method for magnetization of permanent toroidal magnet e.g. for electric motor, involves pair of magnetizing coils each on periphery of toroidal magnet |
| CN101071672A (en) * | 2007-04-17 | 2007-11-14 | 安泰科技股份有限公司 | Magnetizing method for batch small sintered Nd-Fe-B magnet |
| CN201247669Y (en) * | 2008-07-29 | 2009-05-27 | 三环瓦克华（北京）磁性器件有限公司 | Device special used for batch pre-magnetization of small volume permanent magnet |
| CN101533703A (en) * | 2008-11-26 | 2009-09-16 | 宁波同创强磁材料有限公司 | Method for magnetizing medium/small-size Nd-Fe-B magnets |
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