CN102891003A - Radial permanent magnet orienting and magnetizing device of concentric ring opposed coil type - Google Patents
Radial permanent magnet orienting and magnetizing device of concentric ring opposed coil type Download PDFInfo
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- CN102891003A CN102891003A CN 201110203315 CN201110203315A CN102891003A CN 102891003 A CN102891003 A CN 102891003A CN 201110203315 CN201110203315 CN 201110203315 CN 201110203315 A CN201110203315 A CN 201110203315A CN 102891003 A CN102891003 A CN 102891003A
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Abstract
The invention discloses a radial permanent magnet orienting and magnetizing device of a concentric ring opposed coil type. The device is characterized in that central excitation coils (1) are arranged on a core bar of an annular compression mould oppositely, wherein the central excitation coils have identical parameters and opposite current directions; two identical compensating coils (9) are arranged outside an annular plunger tip concentrically; and the compensating coils (9) are connected in series with the central excitation coils (1). The turns ratio of the central excitation coils (1) to the compensating coils (9) is adjusted in an experimental method or a simulation method, thereby minimizing an axial component of a magnetic field between the compensating coils (9) and the central excitation coils (1); and meanwhile, by adopting the method for making the mould with non-magnetic materials, a pulse current orienting method and a segmented orienting or magnetizing method of the moving powders, the purposes of enhancing the magnetic field intensity, improving the consistency of the magnetic field direction and increasing the height of a magnet are realized.
Description
Technical field
The present invention relates to the compacting of a kind of radial annular permanent-magnet body orientation, magnetizer, especially adopt the opposed coil of concentric ring to produce orientation compacting, the magnetizer of radial magnetic field.
Background technology
Radial permanent magnet refers to that magnetic direction is radial annular permanent-magnet body, be divided into one pole and multipole radial permanent magnet, the one pole permanent magnet is that all magnetic directions are radial, and magnetic field is all outside or inside, multipole radial permanent magnet is that all magnetic directions are radial, but magnetic field is divided into several parts at circumferencial direction, and magnetic direction alternately outwards or inwardly changes.High-performance magnet will adopt the orientation compacting in forming process, namely utilize directed high-intensity magnetic field that the easy magnetizing axis of magnetic is distributed in a certain direction, after magnet machines, orientation magnetizes again, radial permanent magnet is divided into integral type and split mounting type, the method that the radial magnetic field of the radial permanent magnet oriontation compacting of existing integral type produces mainly contains two classes, one class is the one pole radial orientation, utilize two relative magnet exciting coils in the middle of magnetic pole, to produce approximate radial magnetic field, make the easy magnetizing axis of the magnetic that is arranged in approximate radial magnetic field along radial distribution, the magnet that machines can freely magnetize and be the radial permanent magnet of one pole or multipole radial permanent magnet, another kind is multipole radial orientation, adopt identical with target product in, outer magnetic pole is orientated compacting, the finished product permanent magnet carries out orientation with similar magnetizer and magnetizes, and the product magnetic pole is corresponding with the magnetic pole of orientation compacting when requiring to magnetize.
The Major Difficulties that improves the performance of radial permanent magnet is the magnetic field intensity that how to improve alignment magnetic field and the direction consistency that improves alignment magnetic field, the magnet exciting coil of multipole radial orientation is installed in outer workpiece, utilize permeability magnetic material to form the alignment magnetic field of many magnetic poles of inside and outside correspondence, owing to being subjected to the restriction of permeability magnetic material saturation induction density, its alignment magnetic field can not be too high, the height of magnet, footpath are than also being restricted, and complex structure.
The approximate radial magnetic field that utilizes two relative magnet exciting coils to produce, carry out the magnetic orientation, it is simple in structure, but only be radial magnetic field preferably at the equivalent coil diameter place at relative magnet exciting coil middle part, when magnetic is orientated, can cause the magnetic orientation at two ends incorrect, reduce the performance of permanent magnet, in order to improve the direction consistency, adopt magnetic conductor guiding magnetic field direction, but owing to being subjected to the restriction of magnetic conductor saturation induction density and internal diameter, alignment magnetic field is lower, and the finished product height is less than 1/2 of the internal magnetic pole diameter.
Because above-mentioned restriction, the high performance radial permanent magnet adopts tile-shaped magnet to be assemblied into one pole or multipole radial permanent magnet mostly, has increased the complexity of finished product, makes manufacturing procedure more complicated, increases cost.
Summary of the invention
Concrete scheme of the present invention is: arrange two relative compensation magnet exciting coils two relative magnet exciting coil external concentric, when concentric inner-outer coil excitation direction is identical, can adopt in emulation technology or experimental technique find, the ampere-turn of exterior loop than (in, the ratio of exterior loop electric current number and the number of turn), make the relative gap, middle part of coil and in, very little near the magnetic field axial component in the zone in gap, middle part between the exterior loop, here low axial component refers to that angle of orientation error is less than 15 °, angle of orientation error can be down to 5 ° or lower as required, can improve the length of magnetic field low axial component orientation section by increasing coil height.The radial magnetic field of this programme does not rely on the concentration degree that increases magnetic field of magnetic conductor, therefore the orientation compacting the preferred non-magnetic material of the associated materials such as mould, preferably be high-resistance material simultaneously, the preferred order order of mold materials is followed successively by: pottery, duroplasts, the tungsten carbon steel, without magnetic mould steel, exciting current preferred pulse electric current, for highly less radial permanent magnetic ring, mould can be equipped with the middle gap location of relative magnet exciting coil, magnetic is orientated in the rear direct utilization, the low punch compacting, further, when radial permanent magnet height is larger, can adopt the method for segmentation orientation, be about in height is contained in greater than the magnetic of middle high-intensity magnetic field height, between the exterior loop without in the magnetic mould, during the orientation operation, at first utilize high-intensity magnetic field that the magnetic of the high magnetic field area that mediates is carried out the multiple pulses magnetic field orientating, the degree of orientation of magnetic of high magnetic field area of only mediating this moment is high, the magnetic on both sides is because alignment magnetic field is low, the degree of orientation of magnetic is low, again under the state without strive forward magnetoelectricity stream, in the dependence, low punch be synchronized with the movement mobile magnetic with both sides be orientated low magnetic move in the middle of high magnetic field area, magnetic moves the operation of can demagnetizing before, again to being orientated low magnetic through the multiple pulses magnetic field orientating, so multi-pass operation, finish the orientation work to whole magnetic, after orientation is finished, on mould, low punch carries out compressing, through the conventional demoulding, curing or sintering and fine finishining, make the radial permanent magnet that does not magnetize, adopt at last the method identical with orientation that the radial ring permanent magnet of finished product is magnetized and make the one pole radial permanent magnetic ring, or adopt existing multipole magnetization instrument to carry out multipole magnetization, the mould of above-mentioned segmentation orientation process is installed with magnet exciting coil is concentric, because the restriction of internal diameter, mold materials is difficult to satisfying without magnetic in some cases, satisfy again high-intensity requirement in the high-resistance situation, further designed the tandem orientation, compacting tool set, namely the end at the orientation mould increases compressing mould, the orientation mould is installed with compressing mould is concentric, bucking coil frame internal diameter is consistent with the former internal diameter, center excitation coil overcoat is consistent with the core bar diameter, the orientation mold materials is selected without magnetic, high-resistance material, compacting tool set is selected high-strength material, after the magnetic orientation of in the orientation mould, finishing, magnetic moved in the compacting tool set suppress, compacting tool set can adopt colds pressing, temperature and pressure, or hot pressing die, can improve finished product density like this, further improve the performance of magnet, when the radial permanent magnetic ring thinner thickness, when highly relatively large, because the rubbing action of die wall, make permanent-magnetic clamp density for significantly middle low, both sides are high, design the static pressure orientation compacting tool sets such as the radial permanent magnet rubber pattern of the opposed coil of concentric ring type, realized the orientation compacting of slim radial permanent magnetic ring.
The invention has the beneficial effects as follows: adopt the method for concentric bucking coil, make the direction of the alignment magnetic field of the radial permanent magnet of integral type not rely on magnetic conductor optimization, thereby can adopt the pulsed high-intensity magnetic field to carry out the orientation of magnetic, alignment magnetic field can be higher than leads
The saturation induction density of magnetic material; During conventional opposed coil orientation compacting tool set compacting high performance radial permanent magnetism, the final finished height is less than 1/2 of the internal magnetic pole diameter, and the segmentation orientation of design, magnetizer can make the height of radial permanent magnetic ring not limited by internal diameter; The tandem orientation of design, pressure setting, reduced the requirement of mold materials, can further advance to improve the performance of radial permanent magnet, the static pressure such as the radial permanent magnet rubber pattern of the opposed coil of the concentric ring type of design orientation compacting tool set can be realized the orientation compacting of slim radial permanent magnetic ring.
Embodiment
The present invention is further described below in conjunction with drawings and Examples
The existing biconjugate of Fig. 1 is put the radial permanent magnetism orientation of coil type compacting tool set structure chart;
The existing closed magnetic path type biconjugate of Fig. 2 is put the radial permanent magnetism orientation of coil type compacting tool set structure chart
The radial permanent magnet oriontation pressing structure of the opposed coil of Fig. 3 concentric ring type figure;
The radial permanent magnet segmentation orientation of the opposed coil of Fig. 4 concentric ring type compacting tool set structure chart;
The radial permanent magnet series connection of the opposed coil of Fig. 5 concentric ring type station orientation compacting tool set structure chart;
The static pressure such as the radial permanent magnet rubber pattern of the opposed coil of Fig. 6 concentric ring type orientation compacting tool set structure chart.
1. center excitation coils among the figure, 2. magnetic, 3. die core rod, 4. former, 5. low punch, 6. upper punch, the 7. magnetic line of force, 8. mould symmetry axis, 9. bucking coil, 10. series connection core bar, 11. series connection formers, 12. magnetic conduction core bars, 13. outer magnetic conductive loops, 14. rubber patterns.
Fig. 1 has illustrated that existing biconjugate puts the radial permanent magnetism of coil type orientation compacting tool set structure, two identical center excitation coils (1) are installed with one heart relatively, die core rod (3) is installed on two intervals in the middle of the identical center excitation coil (1) with one heart with former (4), magnetic 2 fills the gap between die core rod (3) and former (4), low punch (5) and upper punch (6) internal-and external diameter and die core rod (3) and former (4) are slidingly matched, and can under the drive of press head, move, electric current among two identical center excitation coils (1) is equal and opposite in direction, during opposite direction, coil produces magnetic field shown in the magnetic line of force (5), the magnetic line of force has consisted of approximate radial magnetic field in the middle of two coils, but is equipped with larger axial component away from interposition.Be positioned at magnetic (2) between die core rod (3) and the former (4) under the effect in magnetic field, easy magnetizing axis can be directed along magnetic line of force direction, but this scheme magnetic is directed larger with radial phase ratio error.
Fig. 2 has illustrated that existing closed magnetic path type biconjugate puts the radial permanent magnetism of coil type orientation compacting tool set structure, compared to Figure 1, be permeability magnetic material with die core rod (3) and former (4), center excitation coil (1) is installed magnetic conduction core bar (12), the mid portion of magnetic conduction core bar (12) and die core rod (3) closely cooperate, closely cooperate with end and the former (4) of permeability magnetic material with the magnetic conduction core bar in the mould outside, consist of outer magnetic conductive loop (13), when center magnet exciting coil (1) when exciting current is arranged, just produce preferably radial magnetic field of direction at die core rod (3) and former (4), but limited by the permeability magnetic material saturation induction density, when the height of magnetic (2) half less than magnetic conduction core bar (12) diameter, the highest 1900KA/m that is no more than of alignment magnetic field, because it is over half that the compressing rear height of magnetic can dwindle, so the radial permanent magnet height of the method manufacturing is no more than 1/4th of straight permanent-magnetic clamp internal diameter.
Fig. 3 has illustrated embodiments of the invention one, be the radial permanent magnet oriontation pressing structure of the opposed coil of concentric ring type, compared to Figure 1, at two identical center excitation coils (1) two bucking coils (9) are installed with one heart, center excitation coil (1) number of turn concentric and bucking coil (9) is determined with emulation or experiment, when emulation or experiment, center excitation coil (1) with one heart and bucking coil (9) equal turn numbers, in the adjustment, exciting current size between the exterior loop, find the proportionate relationship of an inner-outer coil, making the zone as much as possible between bucking coil (9) and the center excitation coil (1) is that magnetic field is radial magnetic field; During life's work, all coils can be connected, in parallel with bucking coil (9) and the center excitation coil (1) of the other end again after bucking coil (9) that also can an end and center excitation coil (1) series connection, the turn ratio of bucking coil (9) and center excitation coil (1) is identical with the current ratio that above-mentioned emulation or experiment are determined, can guarantee like this under any exciting voltage, the long-pending ratio of the electric current in bucking coil (9) and the center excitation coil (1) and the number of turn is constant, thereby makes as far as possible actual alignment magnetic field distribution consistent with experiment or simulation result.During directed compacting, magnetic (2) is filled in the space between die core rod (3) and former (4), according to material characteristics, adopt the condenser type pulsed magnetizer, choose suitable electric capacity and voltage according to experiment or emulation, repeatedly promote blood circulation at bucking coil (9) and center excitation coil (1) and rush electric current, producing pulsed magnetic field is orientated magnetic, use again low punch (5) and upper punch (6) to carry out compressing, adopt the rear mobile low punch (5) of demagnetizer demagnetization and upper punch (6) to deviate from magnet ring, be cured or sintering and fine finishining after, the finished product magnet ring is put in the space that is installed between die core rod (3) and the former (4), adopt the method identical with the magnetic orientation to magnetize to realizing that one pole is radial, also can adopt existing multipole radial magnetization method to realize multipole radial magnetizing.
Fig. 4 has illustrated embodiments of the invention two, be the radial permanent magnet segmentation orientation of the opposed coil of concentric ring type compacting tool set structure, compare with embodiment one, bucking coil (9) is attached with the higher mechanical strength inner sleeve, the inner sleeve internal diameter is identical with former (4) internal diameter, and fixing with former (4).Center excitation coil (1) is attached with the higher mechanical strength overcoat, the overcoat external diameter is identical with die core rod (3) external diameter, and fixing with die core rod (3), during directed compacting, magnetic (2) is filled in the space between die core rod (3) and former (4) and between bucking coil (9) and the center excitation coil (1), the method identical with embodiment one is directed to magnetic, again synchronizing moving low punch (5) and upper punch (6), make fully not directed magnetic be positioned at die core rod (3) and former (4), directed to magnetic with same procedure again, repeatedly repeat rear to finishing all magnetic orientations, suppress again, demagnetization, solidify or sintering, fine finishining, magnetize, method is identical with example one.
Fig. 5 has illustrated embodiments of the invention three, be the radial permanent magnet series connection of the opposed coil of concentric ring type station orientation compacting tool set structure, compare with embodiment two, in center excitation coil (1) bottom series connection core bar (10) is installed, the two external diameter is identical, installation series connection former (11) in the bottom of bucking coil (9), the two internal diameter is identical, adopt the segmentation method for alignment of embodiment two that magnetic is orientated, on synchronous after orientation is finished, lower mobile low punch (5) and upper punch (6) move into magnetic between series connection former (11) and the series connection core bar (10) and form compacting, can adopt various heating means to mould and magnetic heating, realize temperature and pressure or hot pressing, take the later stage technique of embodiment two, carry out post-production, finished product carries out segmentation with the device of embodiment two and magnetizes.
Fig. 6 has illustrated embodiments of the invention four, be the static pressure such as the radial permanent magnet rubber pattern of the opposed coil of concentric ring type orientation compacting tool set structure, compare with embodiment two, between bucking coil (9) and magnetic (2), rubber pattern (14) is installed, low punch (5) and upper punch (6) are pressed in rubber pattern (14) and magnetic (2) two ends simultaneously, because the high resiliency of rubber pattern (14), make magnetic (2) be subject to approximately equalised lateral pressure, the static pressure such as realization are compressing, and other structure is identical with embodiment two with operation.
Claims (4)
1. radial permanent magnet oriontation of the opposed coil type of concentric ring, magnetizer, it is characterized in that two identical center excitation coils (1) of parameter are installed relatively, two identical bucking coils (9) and the concentric installation of center excitation coil (1), up and down with one heart installation mold core bar (3) and former (4) between two groups of coils, low punch (5) and upper punch (6) are positioned between bucking coil (9) and the center excitation coil (1), low punch (5) and upper punch (6) can be under press drives on, lower movement, die core rod (3), former (4), low punch (5), the bobbin of upper punch (6) and center excitation coil (1) bucking coil (9) is non-magnetic material, when satisfying mechanical strength, preferentially select high-resistance material, such as pottery, duroplasts, non-magnesium hard alloy, without magnetic mould etc., center excitation coil (1) bucking coil (9) and center excitation coil (1) series connection, the sense of current is identical with size, on, lower two groups of the direction of the winding current are opposite, can the serial or parallel connection place in circuit, require orientation or the voltage that magnetizes high during series connection, the electric current of whole circuit is larger when in parallel, the size of current of four coils is identical, the coil turn of bucking coil (9) and center excitation coil (1) equals " the ampere-turn ratio " that emulation or experiment the determine ratio of turns product (two coil currents with), determine that principle is: the ampere-turn ratio of adjusting bucking coil (9) and center excitation coil (1) by emulation or experiment, make the magnetic field axial component between bucking coil (9) and the center excitation coil (1) minimum, low axial component radial magnetic field height is during less than two times of magnetics, increase the height of bucking coil (9) and center excitation coil (1), during the orientation compacting, magnetic is filled in die core rod (3), in the space of former (4), adopt pulsed magnetizer to promote blood circulation to bucking coil (9) and center excitation coil (1) and rush electric current, finish the magnetic orientation, mobile low punch (5) and upper punch (6), finish magnetic compressing, adopt existing technique to finish post-production, comprise and solidifying or sintering, the operations such as fine finishining, the product of finishing is installed on die core rod (3), in the former (4), carry out that one pole is radial to magnetize, also can adopt existing multipole radial magnetized head to carry out multipole radial magnetizing.
2. the radial permanent magnet oriontation of the opposed coil type of concentric ring according to claim 1, magnetizer, be designed to segmentation orientation pressure setting, it is characterized in that: the bucking coil in the claim 1 (9) is attached with the high mechanical properties inner sleeve, the inner sleeve internal diameter is identical with former (4) internal diameter, inner sleeve and the former (4) of bucking coil (9) can be made as integral type, and fixing with former (4), center excitation coil (1) is attached with the high mechanical properties overcoat, the overcoat external diameter is identical with die core rod (3) external diameter, and fixing with die core rod (3), overcoat and the die core rod (3) of center excitation coil (1) can be made as one, during the orientation compacting, magnetic (2) is filled in the space between die core rod (3) and former (4) and between bucking coil (9) and the center excitation coil (1), material is selected identical with claim 1, height greater than magnetic (2) filling highly of die core rod (3) and former (4) between die core rod (3) and former (4), and between bucking coil (9) and the center excitation coil (1), after adopting pulsed magnetizer to middle part magnetic orientation, again synchronizing moving low punch (5) and upper punch (6), make the magnetic that is not orientated fully be positioned at die core rod (3) and former (4), finish all magnetic orientations, mobile low punch (5) and upper punch (6) are suppressed, the demoulding, adopt existing technique to finish post-production, magnetic position when the product that machines is placed orientation is taked the method identical with method for alignment to finish segmentation and is magnetized.
3. the radial permanent magnet oriontation of the opposed coil type of concentric ring according to claim 1, magnetizer, be designed to series connection orientation pressure setting, it is characterized in that: series connection core bar (10) is installed in center excitation coil (1) bottom in claim 2, the two external diameter is identical, installation series connection former (11) in the bottom of bucking coil (9), the two internal diameter is identical, adopt the segmentation method for alignment of claim 2 that magnetic is orientated, synchronizing moving low punch (5) and upper punch (6) moved into magnetic between series connection former (11) and the series connection core bar (10) after orientation was finished, mobile low punch (5) and upper punch (6) are suppressed, the demoulding, can adopt various heating means to mould and magnetic heating, realize temperature and pressure or hot pressing, adopt existing technique to finish post-production, finished product carries out segmentation with the apparatus and method of claim 2 and magnetizes.
4. the radial permanent magnet oriontation of the opposed coil type of concentric ring according to claim 1, magnetizer, be designed to the static pressure orientation compacting tool sets such as the radial permanent magnet rubber pattern of the opposed coil of concentric ring type, compare with claim 2, between bucking coil (9) and magnetic (2), rubber pattern (14) is installed, low punch (5) and upper punch (6) are pressed in rubber pattern (14) and magnetic (2) two ends simultaneously, because the high resiliency of rubber pattern (14), make magnetic (2) be subject to approximately equalised lateral pressure, the static pressure such as realization are compressing, and other structure and operation and claim 2 are same.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110203315 CN102891003A (en) | 2011-07-20 | 2011-07-20 | Radial permanent magnet orienting and magnetizing device of concentric ring opposed coil type |
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| CN 201110203315 CN102891003A (en) | 2011-07-20 | 2011-07-20 | Radial permanent magnet orienting and magnetizing device of concentric ring opposed coil type |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248177A (en) * | 2013-04-28 | 2013-08-14 | 广东正民高新磁电有限公司 | Method for manufacturing multiple segments of permanent magnet rotors |
| CN106486253A (en) * | 2015-08-27 | 2017-03-08 | 惠而浦股份有限公司 | For the magnetized apparatus and method of rotor |
| CN111524681A (en) * | 2020-03-29 | 2020-08-11 | 至玥腾风科技集团有限公司 | Magnetizing method of permanent magnet and manufacturing method of high-speed rotor |
| CN111933385B (en) * | 2020-08-13 | 2021-03-26 | 东莞金坤新材料股份有限公司 | Magnetic body coplanar bipolar magnetizing method |
| CN114255960A (en) * | 2021-12-22 | 2022-03-29 | 宁波韵升粘结磁体有限公司 | Radial and axial composite magnetizing device and magnetizing method for bonded neodymium iron boron magnet ring |
-
2011
- 2011-07-20 CN CN 201110203315 patent/CN102891003A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248177A (en) * | 2013-04-28 | 2013-08-14 | 广东正民高新磁电有限公司 | Method for manufacturing multiple segments of permanent magnet rotors |
| CN103248177B (en) * | 2013-04-28 | 2015-05-20 | 广东正民高新磁电有限公司 | Method for manufacturing multiple segments of permanent magnet rotors |
| CN106486253A (en) * | 2015-08-27 | 2017-03-08 | 惠而浦股份有限公司 | For the magnetized apparatus and method of rotor |
| CN111524681A (en) * | 2020-03-29 | 2020-08-11 | 至玥腾风科技集团有限公司 | Magnetizing method of permanent magnet and manufacturing method of high-speed rotor |
| CN111524681B (en) * | 2020-03-29 | 2021-07-27 | 靳普 | Magnetizing method of permanent magnet and manufacturing method of high-speed rotor |
| CN111933385B (en) * | 2020-08-13 | 2021-03-26 | 东莞金坤新材料股份有限公司 | Magnetic body coplanar bipolar magnetizing method |
| CN114255960A (en) * | 2021-12-22 | 2022-03-29 | 宁波韵升粘结磁体有限公司 | Radial and axial composite magnetizing device and magnetizing method for bonded neodymium iron boron magnet ring |
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Application publication date: 20130123 |