Preparation device of tile-shaped magnet and tile-shaped magnet

Abstract

The utility model relates to the technical field of magnet forming, in particular to a preparation device of a tile-shaped magnet and the tile-shaped magnet, the preparation device of the tile-shaped magnet comprises a tile-shaped magnet preparation die, the tile-shaped magnet preparation die comprises an upper die, a lower die and a concave die, the upper die is provided with a first working face, and the first working face is a concave arc-shaped face; a second working surface is arranged on the lower die; the second working surface is a convex arc-shaped surface; a through hole is formed in the female die in the first direction in a penetrating mode, the projection of the through hole in the plane perpendicular to the first direction is a parallelogram, in the first direction, the upper die is arranged on one side of the female die, the lower die is movably arranged in the through hole, and a tile-shaped magnet forming cavity used for manufacturing a tile-shaped magnet is formed between the first working face and the second working face. By changing the shape and size of the tile-shaped magnet, the magnetic circuit structure of the motor can be optimized, the power consumption and noise of the motor are reduced, the comprehensive performance of the motor is improved, and the motor runs more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of magnet molding, in particular to a preparation device for a tile-shaped magnet and the tile-shaped magnet. Background Art

[0002] The tile magnet is a widely used permanent magnet material device, mainly used in permanent magnet motor rotors. Permanent magnet motors use permanent magnets to provide excitation, making the motor structure simpler, reducing processing and assembly costs, and eliminating collector rings and brushes that are prone to problems, improving the reliability of motor operation; and because no excitation current is required, there is no excitation loss, which improves the efficiency and power density of the motor.

[0003] The tile-shaped magnets that provide excitation in existing permanent magnet motors are generally distributed in a ring shape on the inner wall of the motor housing, and the tile-shaped magnets are relatively regular crescent-shaped magnetic tiles. Since the two adjacent side walls of the tile-shaped magnets are vertical planes, the magnetic pole transition of the motor is relatively fast during use, that is, the magnetic pole will jump directly between the NS poles very quickly. This setting will cause the motor to run unstable and make loud noises, thereby reducing the service life of the motor.

[0004] Therefore, there is an urgent need for a manufacturing device for a tile-shaped magnet and a tile-shaped magnet to solve the above problems. Utility Model Content

[0005] The first purpose of the utility model is to provide a device for preparing a tile-shaped magnet, which can prepare a tile-shaped magnet. By changing the shape and size of the tile-shaped magnet, the magnetic circuit structure of the motor can be optimized, the power consumption and noise of the motor can be reduced, the comprehensive performance of the motor can be improved, and the motor can run more smoothly.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A device for preparing a tile-type magnet is provided, comprising a mold for preparing the tile-type magnet, wherein the mold for preparing the tile-type magnet comprises: an upper mold, wherein a first working surface is provided on the upper mold, and the first working surface is a concave arc-shaped surface; a lower mold, wherein a second working surface is provided on the lower mold, and the second working surface is a convex arc-shaped surface; and a concave mold, wherein a through hole is provided on the concave mold along a first direction, and the projection of the through hole on a plane perpendicular to the first direction is a parallelogram. In the first direction, the upper mold is arranged on one side of the concave mold, and the lower mold is movably arranged in the through hole, and a tile-type magnet molding cavity for manufacturing the tile-type magnet is formed between the first working surface and the second working surface.

[0008] As an optional solution for the preparation device of the tile-type magnet, the inner wall surface of the through hole formed on the die includes an adjacent first surface and a second surface, and the angle between the first surface and the second surface is A, wherein 60°≤A<90°.

[0009] As an optional solution of the device for preparing the tile-type magnet, the projection of the second working surface in a plane perpendicular to the first direction is a parallelogram.

[0010] As an optional solution for the device for preparing the tile-type magnet, the angle between two adjacent edges of the projection of the second working surface is B, wherein 60°≤B<90°.

[0011] As an optional solution for the device for preparing the tile-type magnet, the arc surface of the first working surface and the arc surface of the second working surface have the same shape.

[0012] As an optional solution of the device for preparing the tile-type magnet, the upper mold and the female mold are detachably connected.

[0013] As an optional scheme for the preparation device of the tile-type magnet, the preparation device of the tile-type magnet also includes a grinding component, which is used to grind the tile-type magnet formed in the molding cavity of the tile-type magnet, and the grinding component includes: a sliding unit, the tile-type magnet is connected to the sliding unit, and the sliding unit can drive the tile-type magnet to slide along the second direction; two grinding wheels, the two grinding wheels are connected to the two sides of the sliding unit in the second direction, and the axes of the grinding wheels are perpendicular to the sliding direction of the sliding unit, and the two grinding wheels can respectively grind the two side wall surfaces on the tile-type magnet that are parallel to the second direction.

[0014] As an optional solution for the device for preparing the tile-shaped magnet, a plurality of the tile-shaped magnets are connected to the sliding unit, and the plurality of tile-shaped magnets are arranged side by side along the second direction.

[0015] The second purpose of the utility model is to provide a tile-shaped magnet that can optimize the magnetic circuit structure of the motor, reduce the power consumption and noise of the motor, improve the comprehensive performance of the motor, and make the motor run more smoothly.

[0016] To achieve this purpose, the utility model adopts the following technical solutions:

[0017] Provided is a tile-shaped magnet, which is prepared using the above-mentioned tile-shaped magnet preparation device. The tile-shaped magnet includes a third surface and a fourth surface that are relatively arranged, the third surface and the fourth surface are both arc-shaped surfaces, and the unfolded surfaces formed by flattening the third surface and the fourth surface are both parallelograms.

[0018] As an optional solution for the tile-shaped magnet, the tile-shaped magnet is a permanent ferrite magnet.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides a preparation device for a tile-type magnet. The preparation device for the tile-type magnet comprises a tile-type magnet preparation mold. The tile-type magnet preparation mold comprises an upper mold, a lower mold and a female mold. The upper mold is provided with a first working surface, which is a concave arc surface; the lower mold is provided with a second working surface; the second working surface is a convex arc surface; a through hole is opened on the female mold along a first direction, and the projection of the through hole in a plane perpendicular to the first direction is a parallelogram. In the first direction, the upper mold is arranged on one side of the female mold, and the lower mold is movably arranged in the through hole. A tile-type magnet molding cavity for manufacturing the tile-type magnet is formed between the first working surface and the second working surface. A through hole in the shape of a parallelogram is opened on the die, and a tile-type magnet molding cavity is formed between the inner wall of the through hole, the first working surface and the second working surface, so that the projection of the prepared tile-type magnet in a plane perpendicular to the first direction is a parallelogram, and the two adjacent side walls of the tile-type magnet are no longer perpendicular. By changing the shape and size of the tile-type magnet, the magnetic circuit structure of the motor can be optimized, the power consumption and noise of the motor can be reduced, the comprehensive performance of the motor can be improved, and the motor can run more smoothly.

[0021] The utility model also provides a tile-shaped magnet, which is prepared by the above-mentioned tile-shaped magnet preparation device, and the tile-shaped magnet includes a third surface and a fourth surface parallel to each other, and the third surface and the fourth surface are both arc-shaped surfaces, and the unfolded surface of the tile-shaped magnet is a parallelogram. By changing the shape and size of the tile-shaped magnet, the magnetic circuit structure of the motor can be optimized, the power consumption and noise of the motor can be reduced, the comprehensive performance of the motor can be improved, and the motor can run more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of a mold for preparing a tile-shaped magnet provided in an embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of a tile-shaped magnet provided in an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the structure of the grinding assembly provided by the embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of a grinding process for preparing a tile-shaped magnet provided by an embodiment of the utility model;

[0026] Figure 5 It is another grinding schematic diagram for preparing tile-shaped magnets provided in an embodiment of the utility model.

[0027] In the figure:

[0028] 1. Upper die; 11. First working surface;

[0029] 2. Lower die; 21. Second working surface;

[0030] 3. Concave mold; 301. Tile-shaped magnet forming cavity;

[0031] 4. Grinding assembly; 41. Sliding unit; 42. Grinding wheel;

[0032] 100. tile-shaped magnet; 101. third surface; 102. fourth surface; 110. area to be ground. DETAILED DESCRIPTION

[0033] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and implementation methods. It is understood that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings, rather than all.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] like Figure 1As shown, the preparation device of the tile-type magnet of this embodiment includes a tile-type magnet preparation mold, and the tile-type magnet preparation mold includes an upper mold 1, a lower mold 2 and a die 3. The upper mold 1 is provided with a first working surface 11, and the first working surface 11 is a concave arc surface; the lower mold 2 is provided with a second working surface 21, and the second working surface 21 is a convex arc surface; a through hole is opened on the die 3 along a first direction, and the projection of the through hole in a plane perpendicular to the first direction is a parallelogram. In the first direction, the upper mold 1 is arranged on one side of the die 3, and the lower mold 2 is movably arranged in the through hole, and a tile-type magnet molding cavity 301 for manufacturing the tile-type magnet 100 is formed between the first working surface 11 and the second working surface 21. A parallelogram-shaped through hole (not shown in the figure) is penetrated through the die 3, and a tile-type magnet molding cavity 301 is formed between the inner wall of the through hole, the first working surface 11 and the second working surface 21, so that the unfolded surface of the prepared tile-type magnet 100 is a parallelogram, which can optimize the magnetic circuit structure of the motor, reduce the power consumption and noise of the motor, improve the comprehensive performance of the motor, and make the motor run more smoothly.

[0037] like Figure 2 As shown, the two adjacent side walls of the tile-shaped magnet 100 are no longer perpendicular. By changing the shape and size of the tile-shaped magnet 100, the direct jump of the magnetic poles during the use of the motor can be avoided. In this embodiment, the magnetic poles of the tile-shaped magnet 100 will slowly change from one point, so that the magnetic pole transition is relatively smooth, allowing the motor to run relatively smoothly.

[0038] In the present embodiment, the tile-shaped magnet 100 is prepared by wet pressing anisotropic sintering process. The magnetic properties of the magnet prepared by wet pressing anisotropic process are relatively higher, and the current production volume is also the largest. In the present embodiment, the tile-shaped magnet preparation mold is designed according to the shape of the tile-shaped magnet 100, wherein the shape of the tile-shaped magnet forming cavity 301 is the same as the shape of the tile-shaped magnet 100, and then the slurry is poured into the tile-shaped magnet forming cavity 301, and then the upper mold 1 and the lower mold 2 are respectively pressed on the upper and lower ends of the tile-shaped magnet forming cavity 301 for magnetic field orientation pressing. Afterwards, the tile-shaped magnet 100 obtained in the tile-shaped magnet preparation mold can be sintered, heat treated, machined, and surface coated to obtain the final tile-shaped magnet 100.

[0039] Preferably, in order to ensure that the shape of the through hole on the die 3 is the same as the shape of the tile-type magnet 100 to be prepared, the shape of the through hole is a parallelogram. Specifically, the inner wall surface of the through hole formed by the die 3 includes an adjacent first surface (not shown in the figure) and a second surface (not shown in the figure), and the angle between the first surface and the second surface is defined as A, wherein 60°≤A<90°, so that the shape of the through hole is a parallelogram. In a specific embodiment, A is 60°; in a specific embodiment, A is 65°; in a specific embodiment, A is 70°; in a specific embodiment, A is 75°; in a specific embodiment, A is 80°; in a specific embodiment, A is 85°; in a specific embodiment, A is 89°.

[0040] Furthermore, the projection of the second working surface 21 in a plane perpendicular to the first direction is a parallelogram. The second working surface 21 has the same shape as the through hole, and the second working surface 21 cooperates with the tile-shaped magnet forming cavity 301 to form the tile-shaped magnet 100 in one go along the up and down directions, with a simple processing process, low cost and high efficiency.

[0041] Preferably, the angle between two adjacent sides of the projection of the second working surface 21 is defined as B, wherein 60°≤B<90°, so that the second working surface 21 cooperates better with the tile-shaped magnet forming cavity 301. In a specific embodiment, B is 60°; in a specific embodiment, B is 65°; in a specific embodiment, B is 70°; in a specific embodiment, B is 75°; in a specific embodiment, B is 80°; in a specific embodiment, B is 85°; in a specific embodiment, B is 89°.

[0042] More preferably, the angle B between two adjacent edges of the second working surface 21 is the same as the angle A between the first surface and the second surface. For example, in a specific embodiment, the angle between the first surface and the second surface is 60°, and the angle between two adjacent edges of the second working surface 21 is 60°; in a specific embodiment, the angle between the first surface and the second surface is 70°, and the angle between two adjacent edges of the second working surface 21 is 70°; in a specific embodiment, the angle between the first surface and the second surface is 80°, and the angle between two adjacent edges of the second working surface 21 is 80°; in a specific embodiment, the angle between the first surface and the second surface is 89°, and the angle between two adjacent edges of the second working surface 21 is 89°.

[0043] Preferably, the arc surface of the first working surface 11 and the arc surface of the second working surface 21 have the same shape, so that the two arc surfaces of the prepared tile-shaped magnet 100 are parallel to each other, thereby improving the yield rate.

[0044] In this embodiment, the upper die 1 and the concave die 3 are detachably connected, which is convenient for mold closing and mold opening and improves work efficiency. Specifically, in this embodiment, the upper die 1 and the concave die 3 are connected by bolts, wherein the concave die 3 is provided with a bolt fixing hole (not shown in the figure), and the bolt is inserted into the bolt fixing hole to connect the upper die 1 and the concave die 3.

[0045] In this embodiment, the tile-shaped magnet 100 prepared by the tile-shaped magnet preparation mold will be deformed after sintering, so it is necessary to use a grinding process to correct the sintered deformed tile-shaped magnet 100 to obtain a tile-shaped magnet 100 that meets the size requirements.

[0046] Specifically, the preparation device of the tile-type magnet also includes a grinding component 4, which is used to grind the tile-type magnet 100 formed in the tile-type magnet molding cavity 301. The grinding component 4 includes a sliding unit 41 and two grinding wheels 42. The tile-type magnet 100 is connected to the sliding unit 41, and the sliding unit 41 can drive the tile-type magnet 100 to slide along the second direction; the two grinding wheels 42 are connected to the sliding unit 41 on both sides of the second direction, and the axis of the grinding wheel 42 is perpendicular to the sliding direction of the sliding unit 41. The two grinding wheels 42 can respectively grind the two side wall surfaces on the tile-type magnet 100 that are parallel to the second direction.

[0047] like Figure 4 As shown, the area to be ground 110 is the two side surfaces of the tile-type magnet 100 and the second direction. Therefore, after the tile-type magnet 100 is placed on the sliding unit 41, the area to be ground 110 on the two side surfaces of the tile-type magnet 100 are respectively in contact with the two grinding wheels 42. Along the second direction, the grinding wheel 42 can grind the area to be ground 110. The operation is simple and the production cost can be reduced.

[0048] In this embodiment, the sliding unit 41 is two parallel guide rails, and the tile-shaped magnet 100 is slidably connected to the two guide rails; in other embodiments, the sliding unit 41 can also be a conveyor belt, and the tile-shaped magnet 100 is placed on the conveyor belt.

[0049] Preferably, a plurality of tile-shaped magnets 100 are connected to the sliding unit 41, and the plurality of tile-shaped magnets 100 are arranged side by side along the second direction. Figure 3 As shown, two side surfaces of the tile-shaped magnet 100 are parallel to the guide rail, and two adjacent tile-shaped magnets 100 abut against each other, so that more tile-shaped magnets 100 can be accommodated on the guide rail, thereby improving productivity.

[0050] This embodiment also provides a tile-shaped magnet 100, which is prepared by using the above-mentioned tile-shaped magnet preparation device. The tile-shaped magnet 100 includes a third surface 101 and a fourth surface 102 that are arranged opposite to each other. The third surface 101 and the fourth surface 102 are both arc-shaped surfaces. The unfolded surfaces of the third surface 101 and the fourth surface 102 after flattening are both parallelograms. Figure 2As shown, the angle between the bottom surface and the side surface of the tile-shaped magnet 100 is an acute angle, and the angle between the bottom surface and the side surface of the tile-shaped magnet 100 is defined as C, wherein 60°≤C<90°. In a specific embodiment, C is 60°; in a specific embodiment, C is 65°; in a specific embodiment, C is 70°; in a specific embodiment, C is 75°; in a specific embodiment, C is 80°; in a specific embodiment, C is 85°; in a specific embodiment, C is 89°. By changing the shape and size of the tile-shaped magnet 100, the magnetic circuit structure of the motor can be optimized, the power consumption and noise of the motor can be reduced, the comprehensive performance of the motor can be improved, and the motor can run more smoothly.

[0051] Preferably, the tile-shaped magnet 100 is a permanent ferrite magnet. The raw material price of the permanent ferrite material is cheap, and the production process is relatively simple. It is not corroded by the environment or chemical substances (except strong acid), so the surface does not need electroplating treatment.

[0052] In another embodiment, the tile-shaped magnet 100 can also be prepared by using a preparation mold of a right-angle tile-shaped magnet in the prior art to obtain a right-angle tile-shaped magnet, such as Figure 5 As shown, the grinding area 110 is removed by grinding to obtain a tile-shaped magnet 100 that meets the size specifications. This preparation method does not require redesigning the preparation mold of the tile-shaped magnet 100, but the workload of the subsequent grinding process is relatively large.

[0053] Furthermore, multiple tile-shaped magnets 100 are arranged in the motor and are arranged to form a ring, so that the motor runs more smoothly, the power consumption and noise of the motor are reduced, and the overall performance of the motor is improved. In this embodiment, four tile-shaped magnets 100 are arranged in the motor, and the third surface 101 of each tile-shaped magnet 100 is in contact with the inner wall surface of the motor, and the four tile-shaped magnets 100 are arranged to form a ring. In other embodiments, a suitable number of tile-shaped magnets 100 can be selected according to the size of the motor, and no specific limitation is made here.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A device for preparing a tile-shaped magnet, characterized in that: The invention comprises a mold for preparing a tile-shaped magnet, wherein the mold for preparing a tile-shaped magnet comprises: An upper die (1), wherein the upper die (1) is provided with a first working surface (11), and the first working surface (11) is a concave arc-shaped surface; A lower mold (2), wherein the lower mold (2) is provided with a second working surface (21), and the second working surface (21) is a convex arc surface; A die (3) is provided with a through hole extending through the die (3) along a first direction, the projection of the through hole in a plane perpendicular to the first direction being a parallelogram, the upper die (1) being arranged on one side of the die (3) in the first direction, the lower die (2) being movably arranged in the through hole, and a tile-shaped magnet molding cavity (301) for manufacturing a tile-shaped magnet is formed between the first working surface (11) and the second working surface (21).

2. The device for preparing a tile-shaped magnet according to claim 1, characterized in that: The inner wall surface of the through hole formed on the die (3) comprises a first surface and a second surface adjacent to each other, the angle between the first surface and the second surface being A, wherein 60°≤A<90°.

3. The device for preparing a tile-shaped magnet according to claim 1, characterized in that: The projection of the second working surface (21) in a plane perpendicular to the first direction is a parallelogram.

4. The device for preparing a tile-shaped magnet according to claim 3, characterized in that: The included angle between two adjacent sides of the projection of the second working surface (21) is B, wherein 60°≤B<90°.

5. The device for preparing a tile-shaped magnet according to claim 1, characterized in that: The arc surface of the first working surface (11) and the arc surface of the second working surface (21) have the same shape.

6. The device for preparing a tile-shaped magnet according to claim 1, characterized in that: The upper die (1) and the female die (3) are detachably connected.

7. The device for preparing a tile-shaped magnet according to claim 1, characterized in that: The device for preparing the tile-shaped magnet further comprises a grinding assembly (4), wherein the grinding assembly (4) is used to grind the tile-shaped magnet formed in the tile-shaped magnet forming cavity (301), and the grinding assembly (4) comprises: A sliding unit (41), the tile-shaped magnet being connected to the sliding unit (41), and the sliding unit (41) being capable of driving the tile-shaped magnet to slide along a second direction; Two grinding wheels (42), the two grinding wheels (42) are connected to the two sides of the sliding unit (41) in the second direction, and the axes of the grinding wheels (42) are perpendicular to the sliding direction of the sliding unit (41), and the two grinding wheels (42) can respectively grind the two side wall surfaces of the tile-shaped magnet that are parallel to the second direction.

8. The device for preparing a tile-shaped magnet according to claim 7, characterized in that: The sliding unit (41) is connected to a plurality of the tile-shaped magnets, and the plurality of the tile-shaped magnets are arranged side by side along the second direction.

9. A tile-type magnet, characterized in that: The tile-shaped magnet is prepared by using the preparation device of the tile-shaped magnet as described in any one of claims 1 to 8, wherein the tile-shaped magnet comprises a third surface (101) and a fourth surface (102) arranged opposite to each other, wherein the third surface (101) and the fourth surface (102) are both arc-shaped surfaces, and the unfolded surfaces formed by flattening the third surface (101) and the fourth surface (102) are both parallelograms.

10. The tile-shaped magnet according to claim 9, characterized in that: The tile-shaped magnet is a permanent ferrite magnet.

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