Heat treatment device for improving coercive force of sintered neodymium-iron-boron magnet

Abstract

The utility model relates to a heat treatment device for improving the coercive force of a sintered neodymium-iron-boron magnet, the heat treatment device comprises an oven and material trays for placing materials, the material trays are detachably connected to the oven, and a plurality of material trays are placed in the oven; sliding cavities allowing the material trays to be inserted therein are formed in the two sides of the oven, and cavity openings of the sliding cavities are rotationally connected with supporting plate pieces. The supporting plate piece is provided with a sealing station and a guiding station, and when the supporting plate piece is located at the sealing station, the supporting plate piece can block a cavity opening of the sliding cavity; and when the supporting plate piece is located at the guiding station, the material disc can be erected on the supporting plate piece, and the effect that the material disc can be conveniently installed in the oven or taken out of the oven is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of neodymium iron boron magnet processing equipment, in particular to a heat treatment device for improving the coercivity of sintered neodymium iron boron magnets. BACKGROUND

[0002] At present, as a kind of super high energy density permanent magnet material, neodymium iron boron magnetic material is widely used in various fields, such as electric vehicles, wind power generation, nuclear magnetic resonance, industrial permanent magnet motor, electronic equipment, magnetic machinery, etc. In recent years, the application of neodymium iron boron magnetic material has made a great progress.

[0003] For the related technology in the above, there are still defects: when the neodymium iron boron magnet material is heat treated, the neodymium iron boron magnet material is stacked on the material disc, and then the material disc is pushed into the oven as a whole. However, since the neodymium iron boron magnet material is stacked on the material disc, the weight of the material disc is increased. Moreover, since the material disc is frequently installed and disassembled, the workers have to exert a lot of effort to lift the material disc, which is very inconvenient. The installation between the existing oven and the material disc is not simple, so there is a risk that the workers cannot lift the material disc stably, and thus it needs to be improved. CONTENT OF THE UTILITY MODEL

[0004] In order to facilitate the installation of the material disc into the oven or the taking out of the material disc from the oven, the present application provides a heat treatment device for improving the coercivity of sintered neodymium iron boron magnets.

[0005] The heat treatment device for improving the coercivity of sintered neodymium iron boron magnets provided by the present application adopts the following technical solution:

[0006] A heat treatment device for improving the coercivity of sintered neodymium iron boron magnets, comprising an oven and a material disc for placing materials, the material disc is detachably connected to the oven, and a plurality of material discs are placed in the oven; sliding cavities for inserting the material disc are formed on both sides of the oven, and a supporting plate is rotatably connected to the cavity opening of the sliding cavity; the supporting plate has a sealing station and a guiding station, when the supporting plate is in the sealing station, the supporting plate can block the cavity opening of the sliding cavity; when the supporting plate is in the guiding station, the material disc can be erected on the supporting plate.

[0007] Optionally, a limiting block is further slidably connected to the oven, when the supporting plate is in the sealing station, the supporting plate is located between the limiting block and the oven, a spring and a pushing block are further connected to the oven, and the pushing block makes the supporting plate have a tendency to always move towards the guiding station.

[0008] Optionally, the end of the limiting block close to the supporting plate is provided with a guiding surface, and the guiding surface is an inclined surface.

[0009] Optionally, a center groove is arranged in the center of the supporting plate, and a roller is rotatably connected in the center groove, a plurality of curved blocks are integrally arranged on the outer edge of the roller, the curved blocks are circumferentially arranged on the roller, and the curved blocks are all bent towards one direction.

[0010] Optionally, a spring is further fixedly connected in the center groove, one end of the spring is fixedly connected to the inner groove wall of the center groove, and the other end of the spring can be embedded in the gap between adjacent curved blocks.

[0011] Optionally, when the supporting plate is turned from the sealing station to the guiding station, the turning angle is equal to or greater than 90°.

[0012] Optionally, the opening of the sliding cavity of the oven is provided with a chamfer.

[0013] In summary, when the user prepares to put the material tray into the oven, the limiting block can be pushed away from the sliding cavity first, so that the supporting plate is moved to the guiding station by the action of the spring and the pushing piece, then the worker sets the material tray on the supporting plate, and guides the material tray into the sliding cavity through the roller arranged on the supporting plate; after the material tray is completely put into the sliding cavity, the worker rotates the supporting plate, so that the supporting plate is moved from the guiding station to the sealing station, and the limiting block is pushed during the movement of the supporting plate, and finally the supporting plate is located between the limiting block and the oven, and the supporting plate is always kept in the sealing station by the limiting of the limiting block. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the embodiment of the application.

[0015] Figure 2 is an enlarged schematic diagram of the structure of the supporting plate in the guiding station in the embodiment of the application.

[0016] Figure 3 is an enlarged schematic diagram of the structure of the supporting plate in the sealing station in the embodiment of the application.

[0017] Figure 4 is a partial structure sectional view of the center groove in the embodiment of the application.

[0018] Fig. 1 is an oven; Fig. 2 is a material tray; Fig. 3 is a sliding cavity; Fig. 4 is a supporting plate; Fig. 5 is a limiting block; Fig. 6 is a pushing block; Fig. 7 is a spring; Fig. 8 is a guiding surface; Fig. 9 is a center groove; Fig. 10 is a roller; Fig. 11 is a curved block; Fig. 12 is a spring; and Fig. 13 is a chamfer. DETAILED DESCRIPTION

[0019] The following will be described in detail with reference to the accompanying drawings. Figures 1-4 The application will be further described in detail.

[0020] The embodiment of the application discloses a heat treatment device for improving the coercivity of sintered neodymium-iron-boron magnet. Figure 1 、 Figure 2 and Figure 3 A heat treatment device for improving the coercivity of sintered neodymium-iron-boron magnet comprises an oven 1 and a material tray 2 for placing materials. After a worker processes materials and places the materials on the material tray 2, the material tray 2 is inserted into the oven 1, and the material tray 2 is fixed. Then, the oven door of the oven 1 is closed, and the oven 1 performs heat treatment on the materials.

[0021] Referring to Figure 1 、 Figure 2 and Figure 3 A plurality of sliding cavities 3 for inserting the material tray 2 are formed at the opening of the oven 1, and each group of the sliding cavities 3 is located at the same height on the two sides of the oven 1. The oven 1 is provided with a plurality of groups of the sliding cavities 3 for use of a plurality of material trays 2.

[0022] A supporting plate 4 is rotationally connected at the cavity opening of each sliding cavity 3, and the supporting plate 4 is provided with a sealing station and a guiding station according to different positions. When the supporting plate 4 is in the guiding station, the supporting plate 4 is dislocated from the cavity opening of the sliding cavity 3, and the supporting plate 4 is relatively laid on the cavity opening of the sliding cavity 3 at this time. When a worker is ready to insert the material tray 2 into the oven 1, the worker can first place the two ends of the material tray 2 on the supporting plate 4, and then the worker pushes the material tray 2 into the sliding cavity 3 through the supporting plate 4.

[0023] Referring to Figure 2 、 Figure 3 and Figure 4 A center groove 9 is further formed at the center of the supporting plate 4, and a roller 10 is rotationally connected in the center groove 9. When the material tray 2 is placed on the supporting plate 4, the material tray 2 is in contact with the roller 10, the contact area of the material tray 2 and the supporting plate 4 is reduced through the action of the roller 10, so that the friction between the material tray 2 and the supporting plate 4 is reduced, and the worker can conveniently push the material tray 2 towards the sliding cavity 3.

[0024] A plurality of curved blocks 11 are integrally formed on the outer edge of the roller 10, the curved blocks 11 are circumferentially arranged on the roller 10, and the curved surfaces of the curved blocks 11 are all bent in the same direction. However, there is a gap between adjacent curved blocks 11. A spring sheet 12 is further connected in the center groove. When the worker pushes the material tray 2 towards the sliding cavity 3, the roller 10 and the curved blocks 11 rotate at the same time, and at this time, the spring sheet 12 does not insert into the gap between adjacent curved blocks 11 with the rotation of the curved blocks 11.

[0025] But when the material tray 2 slips on the supporting plate 4, the roller 10 will be reversed at this time, and the elastic sheet 12 will be inserted into the gap between the adjacent curved blocks 11 to stop the rotation of the roller 10 in the process of rotating towards the elastic sheet 12, so as to prevent the risk of the material tray 2 falling from the supporting plate 4.

[0026] With reference to Figure 1 , Figure 2 and Figure 3 , the limiting blocks 5 are also slidably connected on both sides of the oven 1, and the number of the limiting blocks 5 is the same as the number of the openings of the sliding cavities 3. The limiting blocks 5 can be in contact with the corresponding supporting plates 4.

[0027] After the staff pushes the material tray 2 into the sliding cavity 3, the position of the limiting block 5 can be changed, so that the limiting block 5 is transferred from the guiding position to the sealing position. At this time, the supporting plate 4 is transferred from the guiding position to the sealing position, and the rotation angle is greater than or equal to 90°. When the supporting plate 4 completely enters the sealing position, the supporting plate 4 will seal the opening of the sliding cavity 3. At this time, the limiting block 5 automatically slides down under the action of gravity and is in contact with the supporting plate 4, so that the supporting plate 4 always maintains the state of sealing the opening of the sliding cavity 3.

[0028] The guiding surface 8 is provided on one end of the limiting block 5 close to the supporting plate 4, and the guiding surface 8 is an inclined surface. When the supporting plate 4 is transferred from the guiding position to the sealing position, the supporting plate 4 will first contact the guiding surface 8 on the limiting block 5, and the guiding surface 8 will automatically move the limiting block 5 away from the sliding cavity 3. In this way, the staff does not need to pull the limiting block 5, and the rotation of the supporting plate 4 can automatically rotate the limiting block 5.

[0029] With reference to Figure 1 , Figure 2 and Figure 3 , after the limiting block 5 is in the sealing position, the spring 7 and the pushing block 6 are also connected between the limiting block 5 and the oven 1. One end of the spring 7 is fixedly connected with the pushing block 6, and the other end of the spring 7 is fixedly connected with the oven 1. If the staff needs to transfer the limiting block 5 from the sealing position to the guiding position again, the staff only needs to pull the limiting block 5 to dislocate the limiting block 5 and the supporting plate 4. At this time, the supporting plate 4 will automatically transfer from the sealing position to the guiding position under the action of the spring 7 and the pushing block 6.

[0030] With reference to Figure 1 , the oven 1 is provided with a chamfer 13 at the opening of the sliding cavity 3 to facilitate the staff to align the material tray 2 with the opening of the sliding cavity 3.

[0031] The embodiment of the application discloses a kind of heat treatment device for improving the coercivity of sintered neodymium iron boron magnet, and the implementation principle is: when user prepares to insert material tray 2 into oven 1, first limit block 5 can be pushed towards the direction away from sliding cavity 3, so that supporting plate 4 is moved to guide station by the action of spring 7 and pusher, then the staff sets up material tray 2 on supporting plate 4, and guides material tray 2 into sliding cavity 3 by the roller 10 arranged on supporting plate 4; after material tray 2 completely enters sliding cavity 3, the staff rotates supporting plate 4 again, so that supporting plate 4 moves from guide station to sealing station, and limit block 5 will be pushed in the process of supporting plate 4 moving, and finally supporting plate 4 will be located between limit block 5 and oven 1, and supporting plate 4 always keeps sealing station by the limiting of limit block 5.

[0032] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so: equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A heat treatment device for improving the coercivity of sintered neodymium-iron-boron magnets, comprising an oven (1) and material trays (2) for placing material, the material trays (2) being detachably connected to the oven (1), and a plurality of material trays (2) being placed in the oven (1); characterized in that: The oven (1) is provided with sliding cavities (3) on both sides for inserting material trays (2), and the cavity openings of the sliding cavities (3) are rotationally connected with supporting plate members (4); the supporting plate members (4) have sealing stations and guiding stations, when the supporting plate members (4) are at the sealing stations, the supporting plate members (4) can block the cavity openings of the sliding cavities (3); when the supporting plate members (4) are at the guiding stations, the material trays (2) can be placed on the supporting plate members (4).

2. The apparatus for improving the coercivity of sintered Nd-Fe-B magnets by heat treatment according to claim 1, characterized in that: The oven (1) is further provided with a limiting block (5) connected in a sliding manner, when the supporting plate members (4) are at the sealing stations, the supporting plate members (4) are located between the limiting block (5) and the oven (1), and the oven (1) is further connected with a spring (7) and a pushing block (6), the pushing block (6) makes the supporting plate members (4) have a tendency to always move towards the guiding stations.

3. The apparatus for improving the coercivity of sintered Nd-Fe-B magnets according to claim 2, characterized in that: The limiting block (5) is provided with a guiding surface (8) at one end close to the supporting plate members (4), and the guiding surface (8) is an inclined surface.

4. The apparatus for improving the coercivity of sintered Nd-Fe-B magnets according to claim 1, characterized in that: The supporting plate members (4) are provided with a central groove (9) at the center, the central groove (9) is rotationally connected with a roller (10) inside, the roller (10) is integrally provided with a plurality of curved blocks (11) at the outer edge, the curved blocks (11) are circumferentially arranged on the roller (10), and the curved blocks (11) are all bent towards one direction.

5. The apparatus for improving the coercivity of sintered Nd-Fe-B magnets according to claim 4, characterized in that: The central groove (9) is further fixedly connected with an elastic sheet (12) inside, one end of the elastic sheet (12) is fixedly connected with the inner groove wall of the central groove (9), and the other end of the elastic sheet (12) can be embedded into the gap between adjacent curved blocks (11).

6. The apparatus for improving the coercivity of sintered Nd-Fe-B magnets by heat treatment according to claim 1, characterized in that: When the supporting plate members (4) are switched from the sealing stations to the guiding stations, the rotation angle is equal to or greater than 90°.

7. The apparatus for improving the coercivity of sintered Nd-Fe-B magnets according to claim 1, characterized in that: The opening of the oven (1) provided with the sliding cavities (3) is provided with a chamfer (13).

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