JPH05129132A - Magnetization equipment for anisotropic polar magnet - Google Patents

Abstract

PURPOSE:To simplify the drive mechanism of magnetization yoke and enhance the productivity by shortening the cycle time of a magnetization process. CONSTITUTION:On a turntable 1 rotated intermittently around a shaft 18, a plurality of anisotropic polar magnets (a), i.e., works are sequentially supplied from the work supply section 3, their poles are first aligned by a permanent magnet in a temporary magnetization section 4 and are temporarily magnetized. Thereafter, they are finally magnetized at the final magnetization section 5, the quality of the magnetization is inspected by a magnetization inspection section 6, and are ejected from a discharge sections 7 and 8 to conveyers 91 and 92. Since the temporary magnetization section is provided before the final magnetization section, the alignment of magnetic poles of the anisotropic polar magnets can be made much easier; even the magnetic force characteristics of the anisotropic polar magnets are deteriorated by the permanent magnet for magnetic pole alignment, the magnetic force characteristics will be recovered by subsequent magnetization of the final magnetization section and thus the operation of a magnetization yoke in the magnetization section can be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polar anisotropic magnet magnetizing device for magnetizing a polar anisotropic magnet and forming magnetic poles on its peripheral surface.

[0002]

2. Description of the Related Art When magnetizing a polar anisotropic magnet formed of a ferrite magnet or the like and forming magnetic poles on the peripheral surface thereof, the polar anisotropic magnet is covered with a cylindrical magnetizing yoke, and the coil is Conventionally, a means for flowing a current to form a magnetic field with a predetermined magnetic pole arrangement on the inner peripheral side of a magnetizing yoke and magnetizing a polar anisotropic magnet with this magnetic field has been used. In this case, since the polar anisotropic magnet is magnetically oriented in advance during molding, the poles of the magnetizing yoke and the pole anisotropic magnet must be aligned and then magnetized in the magnetizing step. ..

Therefore, in the prior art, permanent magnets such as rare earths are arranged in the circumferential direction of the inner peripheral portion on the opening end side where the polar anisotropic magnet of the magnetizing yoke is fitted. A magnetizing yoke in which magnetic poles are arranged corresponding to the magnetizing poles of the magnetizing yoke is used. Then, when this magnetizing yoke is fitted to the outside of the polar anisotropic magnet, it is slowly fitted to the polar anisotropic magnet from the opening end side where the permanent magnet is provided. Then, the polar anisotropic magnet rotatably held is attracted by the magnetic force of the permanent magnet to rotate, and its magnetic pole coincides with that of the permanent magnet. Further, the magnetized yoke is fitted into the magnetized yoke so that the magnetized yoke is further inserted into the magnetized yoke.
Magnetization is performed by passing a current through the coil of the magnetizing yoke. After that, the magnetizing yoke is pulled out from the end side opposite to the side where the magnetizing yoke is fitted to the polar anisotropic magnet, and the magnetizing is completed.

[0004]

However, in the above-mentioned prior art, it is necessary to slowly fit the magnetizing yoke into the polar anisotropic magnet and align the positions of the magnetic poles before magnetizing. The cycle time for magnetizing the anisotropic magnet becomes long, which is an obstacle to improving productivity. In addition, since the polar anisotropic magnet has a property that magnetic force characteristics deteriorate when the magnet is brought closer to the magnet after magnetizing it, the permanent magnet of the magnetizing yoke is provided after magnetizing as described above. The magnetizing yoke must be pulled out so that the polar anisotropic magnet comes out from the opening on the side opposite to the opening, that is, the opening end on the side opposite to the time of fitting. For this reason, a special drive mechanism is required to obtain the operation of fitting the magnetizing yoke into the polar anisotropic magnet and pulling it out, and there is a drawback that the drive mechanism of the magnetizing yoke becomes complicated. The present invention is
In view of the problems of the prior art as described above, a polar anisotropic magnet magnetizing device capable of improving productivity by simplifying the cycle time of the magnetizing process and simplifying the drive mechanism of the magnetizing yoke is provided. The purpose is to

[0005]

That is, according to the present invention,
In order to achieve the above object, a work transfer means for transferring a cylindrical polar anisotropic magnet in a freely rotatable state, a work supply section for supplying one polar anisotropic magnet to the work transfer means one by one, A magnetized yoke is fitted to the outside of the polar anisotropic magnet on the work transfer means, and the magnetized portion magnetizes the polar anisotropic magnet by the magnetic force formed on the magnetized yoke, and the magnetized pole. In a polar anisotropic magnet magnetizing device having a work discharging unit for discharging an anisotropic magnet from a work conveying unit, a magnetizing device is temporarily magnetized outside the polar anisotropic magnet before the magnetizing unit in the work conveying unit. A temporary magnetizing portion is provided which fits the yoke and temporarily magnetizes the polar anisotropic magnet by the magnetic force formed on the temporary magnetizing yoke, and the polar anisotropic magnet of the temporary magnetizing yoke is fitted. The permanent magnets are arranged in the circumferential direction of the inner peripheral portion on the opening end side, and the magnetic poles of the permanent magnets are magnetized by the temporary magnetizing yoke. Providing polar anisotropic magnet magnetizing apparatus being characterized in that arranged correspondingly with.

[0006]

In the magnetizing device according to the present invention, after the temporary magnetizing yoke provided with the permanent magnet in advance, the poles are aligned and temporarily magnetized,
By performing the main magnetization with another main magnetization yoke, it is not necessary to slowly fit the magnetization yoke to the polar anisotropic magnet during the main magnetization. Since the main magnetizing and the temporary magnetizing can be performed in parallel, the cycle time of the magnetizing step per polar anisotropic magnet can be shortened. Furthermore, in this magnetization, since it is not necessary to provide a permanent magnet for magnetizing the magnetizing yoke, the magnetizing yoke should be removed from the opening end on the same side as when it was fitted to the polar anisotropic magnet. However, the magnetic property of the polar anisotropic magnet does not deteriorate. Therefore,
When the individual polar anisotropic magnets are magnetized, the magnetizing yoke can be moved back and forth with respect to the polar anisotropic magnets, so that the drive mechanism of the magnetizing yoke can be simplified. On the other hand, the temporarily magnetized yoke is
Since the permanent magnet is provided on the one opening end side, when the permanent magnet is pulled out from the direction in which the polar anisotropic magnet is fitted, the magnetic characteristics of the polar anisotropic magnet deteriorate. However, since the temporary magnetization is just a temporary magnetization step before the main magnetization, the magnetic characteristics can be restored by the subsequent main magnetization.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows the entire magnetizing device according to an embodiment of the present invention. Here, the turntable 1 is used as a means for transporting the polar anisotropic magnet a, which is a work, and the turntable 1 is intermittently rotated around a central shaft 18. On the turntable 1, columnar holders 11 (see FIG. 3) for rotatably mounting and holding the polar anisotropic magnet a are erected at 60 ° intervals. A supply station 12, a temporary magnetizing station 13, a main magnetizing station 14, a magnetizing inspection station 15, and a work ejecting station are sequentially set for each stop position. The holding body 1
1 sequentially moves these stations with the intermittent rotation of the turntable 1. In the illustrated embodiment, the work discharge station is composed of a good product discharge station 16 and a defective product discharge station 17.

The supply station 12 is provided with a work supply section 3 for supplying the polar anisotropic magnets a one by one onto the holder 11, and the temporary magnetizing station 13 is provided with the supplied polar anisotropic magnets. A permanent magnetizing unit 4 for magnetically aligning a with a and magnetically magnetizing it is provided in the main magnetizing station 14 for main magnetizing the temporarily magnetized polar anisotropic magnet a at that position. The magnetizing unit 5 in the magnetizing inspection station 15 inspects whether or not the main magnetization is correctly performed in the magnetizing inspection station 15, and the polar anisotropic magnet a in the work discharge station. Work discharge parts for discharging to 92 are respectively provided. As described above, in the illustrated embodiment, the work discharge station is composed of the good product discharge station 16 and the defective product discharge station 17, and the former good product discharge station 16 is determined to be a good product by the magnetization inspection unit 6. The non-defective product discharging unit 7 for discharging the polar anisotropic magnet a to the non-defective product discharging conveyor 91 is the latter defective product discharging station 1
7 is provided with a defective product discharging unit 8 for discharging the polar anisotropic magnet a determined to be defective by the magnetization inspection unit 6 to the defective product discharging conveyor 92.

FIG. 2 shows the work supply unit 3 arranged in the supply station 12. The polar anisotropic magnets a, which are works, are accommodated in a magazine-like case 22 in a line, and this case is used. Are set side by side on the moving table 21. The set case 22 is sent by the case feed cylinder 23 along the moving table 21 in the lateral direction of the case 22, that is, from right to left in FIG. This allows
The case 22 at the top in FIG. 2 is sent to the extension position of the delivery conveyor 25, and the case 2 is sent to this position.
The polar anisotropic magnet a of No. 2 is sent to the above-mentioned sending conveyor 25 by the work sending cylinder 24. The feed-out conveyor 25 is driven by the drive mechanism 26 and feeds the polar anisotropic magnet a from the bottom to the top in FIG. Sensors 27 and 28 for detecting the presence or absence of the polar anisotropic magnet a are arranged near the start point and the end point, and by this, the operations of the case feed cylinder 23 and the work feed cylinder 24 are controlled, and the feed conveyor 25 is provided. The polar anisotropic magnet a can be supplied to the supply destination without interruption.

A work supply unit 3 is arranged on the supply destination side of the delivery conveyor 25, and the work supply unit 3 is provided.
Is a hand chuck unit 3 that holds and holds the polar anisotropic magnet a.
3, a chuck drive unit 32 that opens and closes the hand chuck unit 33, and an arm drive unit 31 that reciprocates the chuck drive unit 32 between positions indicated by a two-dot chain line and a solid line in FIG. In the work supply unit 3, the polar chucking unit 32 holds the polar anisotropic magnet a sent by the sending conveyor 25 by the operation of the chuck driving unit 32 and the arm driving unit 31, and the turn chuck unit 33 holds the polar anisotropic magnet a. 1 on the holding part 11 (see FIG. 3).
The polar anisotropic magnet a is rotatably held on the holding unit 11.

The polar anisotropic magnet a supplied to the holding portion 11 on the turntable 1 is sent to the next temporary magnetizing station 13 by the rotation of the turntable 1. This temporary magnetizing station 13 is shown in FIG. As shown in the figure, the temporary magnetizing station 13 is provided with a temporary magnetizing unit 4, which has a frame 41 which is elevated and lowered by an elevation cylinder 42. Further, a cylinder 43 is provided on the bracket which is erected on the frame 41, and a flange 49 is provided at the tip of the plunger. A holding rod 45 is supported below the cylinder 43 so as to be able to move up and down, and its upper end is suspended from the frame 41 by a flange 44 provided so as to face the flange 49. The cylinder 43 and the holding rod 45 are
The center axis of the holder 11 is arranged right above the holder 11 that stops on the turntable 1. A cylindrical temporary magnetizing yoke 46 is slidably fitted into the holding rod 45, and the temporary magnetizing yoke 46 is attached to the frame 41.
It is fixed to.

As shown in FIG. 4, the temporarily magnetized yoke 46 has permanent magnets 48, 48 ...
Is embedded. Magnetizing yoke 4 of this permanent magnet 48
The magnetic poles facing the center of 6 correspond to the magnetized poles of the temporary magnetized yoke 46. That is, the magnetic poles are arranged so as to have a magnetic pole arrangement different from the magnetic pole to be magnetized to the polar anisotropic magnet a.

FIG. 5 shows the operation of the temporary magnetizing station 13. That is, as shown in FIG. 2B, the frame 41 descends from the state shown in FIG. 3A so that the polar anisotropic magnet a is rotatably held on the holding portion 11. The holding rod 45 is placed under the self-weight, the temporary magnetizing yoke 46 descends, and the temporary magnetizing yoke 46 is fitted to the outside of the polar anisotropic magnet a. At this time, the polar anisotropic magnet a is rotated by the magnetic force of the permanent magnet 48, and its magnetic pole coincides with the magnetized pole of the temporary magnetizing yoke 46. Next, the cylinder 49 shown in FIG. 3 lowers the flange 49 to press the flange 44 of the holding rod 45, and the polar anisotropic magnet a is sandwiched between the holding rod 45 and the holding portion 11. Subsequently, as shown in FIG. 5C, the temporary magnetizing yoke 46 further descends, and a current is supplied to the coil 47 of the temporary magnetizing yoke 46 here. At this time, the magnetic field generated in the temporary magnetizing yoke 46 temporarily magnetizes the polar anisotropic magnet a.
Thereafter, the flange 49 of the cylinder 43 returns to its original position, and the frame 11 rises, which raises the holding rod 45 and the temporarily magnetized yoke 46 as shown in FIG. Return to the state. At this time, since the permanent magnet 48 passes around the polar anisotropic magnet a, the magnetic property of the temporarily magnetized magnetic pole anisotropic magnet a is deteriorated.

Then, the temporarily magnetized polar anisotropic magnet a is sent to the next main magnetizing station 14 by the rotation of the turntable 1. The main magnetizing station is provided with a main magnetizing section 5, which has the same structure as the temporary magnetizing section 4.
Is basically the same as However, the magnetizing yoke 56 does not have the permanent magnets 48, 48 ...

FIG. 6 shows the operation of the main magnetizing station 14. That is, as shown in FIG. 2B, the frame 51 is moved downward from the state shown in FIG. 3A to hold the holding rod on the polar anisotropic magnet a held on the holding portion 11. 55 is placed under its own weight, the main magnetizing yoke 56 is lowered, and the main magnetizing yoke 56 is fitted to the outside of the polar anisotropic magnet a. Further, the holding rod 55 is pressed from above by the cylinder, and the polar anisotropic magnet a is sandwiched between the tip of the holding rod 55 and the holding portion 11. In this state, the magnetic poles of the temporarily magnetized polar anisotropic magnet a are the magnetized poles of the main magnetizing yoke 56. Then, a current is caused to flow through the coil 57 of the main magnetizing yoke 56 in the state shown in FIG.
The polar anisotropic magnet a is permanently magnetized. After that, the cylinder is restored, the frame 11 is raised, and the holding rod 55 and the main magnetizing yoke 56 are raised as shown in FIG. Here, unlike the magnetizing yoke 46 in the temporary magnetizing portion 4, since the permanent magnet 58 is not provided, the magnetic property of the main magnetized magnetic pole anisotropic magnet a is not deteriorated.

Next, the main magnetized polar anisotropic magnet a is sent to the next magnetizing inspection station 15 by the rotation of the turntable 1, and whether or not the magnetizing is correctly performed there. Is inspected by the magnetization inspection unit 6. This magnetization inspection unit 6
Has a configuration basically similar to that of the main magnetizing portion 4, but has an inspection yoke instead of the main magnetizing yoke 56, which is fitted to the magnetized polar anisotropic magnet a and then returned. At this time, it is inspected by the current flowing through the coil of the inspection yoke whether it is properly magnetized.

Next, the polar anisotropic magnet a thus inspected
Is sent to the next non-defective item discharging station 16 shown in FIG. 7 by the rotation of the turntable 1, and the polar anisotropic magnet a determined to be non-defective item by the magnetization inspection section 6 is non-defective item ejecting section 7.
Is discharged to the non-defective product discharge conveyor 91. The non-defective product discharging section 7 includes a hand chuck section 73 that holds and holds the polar anisotropic magnet a, a chuck driving section 72 that opens and closes the hand chuck section 73, and the chuck driving section 72 reciprocates left and right in FIG. An arm drive unit 71 for moving is provided, and the polar anisotropic magnet a held on the holding unit 11 of the turntable 1 is sandwiched by the hand chuck unit 73 according to the inspection result of the magnetization inspection unit 6. It is picked up and placed on a non-defective product discharge conveyor 91 and conveyed by the same conveyor 91.

Further, the polar anisotropic magnet a determined to be defective by the magnetization inspection unit 6 is not ejected at the non-defective item ejecting station 16, and the turntable 1 is rotated to eject the next defective item. It is sent to the station 17 and discharged to the defective product discharge conveyor 92 by the defective product discharge unit 8.
The non-defective product ejecting section 8 has the same structure as the non-defective product ejecting section 7, and the chuck drive section 82 and the arm drive section 81 are actuated according to the inspection result of the magnetization inspection section 6, and the turntable 1 of the turntable 1 is operated. The polar anisotropic magnet a held on the holding unit 11 is sandwiched by the hand chuck unit 83 and picked up, placed on the defective product discharge conveyor 92, and conveyed by the conveyor 92.

As described above, the one cycle process is completed, and the polar anisotropic magnet a is magnetized. These operations are sequentially repeated with the intermittent rotation of the turntable 1, and the polar anisotropic magnet a is sequentially supplied, magnetized, and discharged. In the illustrated embodiment, a turntable is used as a means for transporting the polar anisotropic magnet a to each station, but it goes without saying that this may be replaced with a linear conveyor, a cycle conveyor or the like. is there.

[0020]

As described above, according to the present invention, it is possible to improve the productivity by shortening the cycle time of the magnetizing process and to simplify the driving mechanism of the magnetizing yoke. A magnetizing device can be provided.

[Brief description of drawings]

FIG. 1 is a plan view of a polar anisotropic magnet magnetizing device showing an embodiment of the present invention.

FIG. 2 is a plan view showing a supply station of the apparatus.

FIG. 3 is a partial sectional side view showing a temporary magnetizing station of the apparatus.

FIG. 4 is a bottom view of the temporary magnetizing yoke of the temporary magnetizing unit arranged in the temporary magnetizing station.

FIG. 5 is a partial cross-sectional side view showing an operation in the temporary magnetizing station.

FIG. 6 is a partial cross-sectional side view showing the operation of the main magnetizing station of the apparatus.

FIG. 7 is a plan view showing a discharge station of the apparatus.

[Explanation of symbols]

 1 Turntable 3 Work Supply Section 4 Temporary Magnetization Section 5 Main Magnetization Section 6 Magnetization Inspection Section 7 Good Product Discharge Section 8 Defective Product Discharge Section 12 Supply Station 13 Temporary Magnetization Station 14 Main Magnetization Station 15 Magnetization Inspection Station 16 Non-defective product discharge station 17 Defective product discharge station 91 Non-defective product discharge conveyor 92 Defective product discharge conveyor a Polar anisotropic magnet

Front page continuation (72) Inventor Toshimasa Hagihara 6-16-20 Ueno, Taito-ku, Tokyo Taiyo Induction Co., Ltd.

Claims (1)

[Reference number] 0030377-01 [Claims] 1. A work transfer means for transferring a columnar polar anisotropic magnet in a rotatable state, a work supply section for supplying one polar anisotropic magnet to the work transfer means one by one, and the work transfer. A magnetized yoke which is fitted on the outside of the polar anisotropic magnet on the means, and which magnetizes the polar anisotropic magnet by the magnetic force formed on the magnetized yoke; In a polar anisotropic magnet magnetizing device having a work discharging part for discharging a polar magnet from the work transferring means, a temporary magnetizing yoke is provided outside the polar anisotropic magnet before the magnetizing part in the work transferring means. An opening is provided in which a temporary magnetizing portion that is fitted and that temporarily magnetizes the polar anisotropic magnet by the magnetic force formed in the temporary magnetizing yoke is arranged, and into which the polar anisotropic magnet of the temporary magnetizing yoke is fitted. Permanent magnets are arranged in the circumferential direction of the inner peripheral portion on the end side, and the magnetic poles of the permanent magnets correspond to the magnetized poles of the temporary magnetizing yoke. A polar anisotropic magnet magnetizing device characterized by being arranged.