Diffusion furnace for diffusing heavy rare earth on surface of neodymium iron boron permanent magnet

Abstract

The utility model discloses a diffusion furnace for diffusing heavy rare earth on the surface of a neodymium iron boron permanent magnet, which comprises a base, the top of the base is fixedly connected with a cooling furnace, one side of the cooling furnace is movably connected with a furnace door, a material shaking component is arranged in the cooling furnace, and the top of the base is fixedly connected with a heating furnace component; the material shaking assembly comprises a belt conveyor. According to the diffusion furnace for diffusing heavy rare earth on the surface of the neodymium iron boron permanent magnet, a motor is arranged to drive a rotating disc to rotate, the rotating disc can drive a sliding rod to stretch back and forth through a folding rod, the sliding rod can push a placing frame back and forth, and a placing box can shake and screen back and forth in the placing frame through a spring; and at the moment, the box door can be driven to be opened by starting the electric push rod, the redundant diffusant adhering to the surface can be screened out through the discharging hole, and the requirement for cleaning after the redundant diffusant adhering to the surface is screened can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of surface processing of NdFeB permanent magnets, in particular to a diffusion furnace used for diffusing heavy rare earth on the surface of NdFeB permanent magnets. Background Art

[0002] Grain boundary diffusion technology is based on the principle of increasing the anisotropy field on the grain surface. This technology involves coating the magnet surface with a diffusion agent such as heavy rare earth metals, compounds, or alloys. This process then undergoes a diffusion heat treatment, allowing the heavy rare earth elements to penetrate the magnet interior and be primarily distributed at the grain boundaries and grain surfaces, thereby increasing the magnet's coercive force. This process focuses on strengthening the weak grain surfaces, achieving a reduction in heavy rare earth content. Currently, diffusion furnaces are commonly used to diffuse heavy rare earth elements onto the surfaces of NdFeB permanent magnets.

[0003] Patent document CN211552435U of prior art provides a diffusion furnace for sintering NdFeB permanent magnets. The device is provided with a guide pulley at the bottom of the tube body, which cooperates with a guide plate. When the diffusion tube is fed into the interior of the diffusion box, the guide pulley at the bottom of the tube body is driven to move horizontally on the guide rail provided on the top of the guide plate by pushing the pulley plate, so that the entire diffusion tube can be fed into the interior of the diffusion box. When the diffusion tube is fully fed, one end of the tube body is clamped between two sets of fixing plates, and the end of the tube body is clamped and fixed by two extrusion plates to fix the entire diffusion tube. This prevents the entire diffusion tube from moving or shaking during use, thereby maintaining good stability.

[0004] However, in the existing technology, when the diffusion furnace is used to perform diffusion treatment on the NdFeB covered with the diffusant, the NdFeB is often buried in the diffusant. After the processing is completed, most of the diffusant remains and adheres to the surface of the NdFeB. It is very necessary to clean the residual diffusant. Therefore, we need a diffusion furnace for diffusing heavy rare earths on the surface of NdFeB permanent magnets. Utility Model Content

[0005] The purpose of the utility model is to provide a diffusion furnace for diffusing heavy rare earth on the surface of NdFeB permanent magnets, so as to solve the existing problems raised in the above background technology.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: the diffusion furnace for the surface diffusion of heavy rare earth of neodymium iron boron permanent magnet, including the base, the top of base is fixedly connected with cooling furnace, and one side of cooling furnace is movably connected with furnace door, the inside of cooling furnace is provided with the material shaking subassembly, the top of base is fixedly connected with heating furnace subassembly, the material shaking subassembly includes belt conveyor, the top of belt conveyor is fixedly connected with baffle, the top of belt conveyor is fixedly connected with motor, and the output shaft of motor is fixedly connected with rotating disc through the shaft coupling, one side of rotating disc is movably connected with folding rod, and one end of folding rod is movably connected with slide rod, and the top of belt conveyor is placed with placing rack, and the top of placing rack is fixedly connected with spring, the top of spring is fixedly connected with placing box.

[0007] Preferably, the rotating disc is movably connected with the slide rod through the folding rod, and the folding rod is arranged between the rotating disc and the slide rod.

[0008] Preferably, the placing rack is elastically connected with the placing box through the spring, the number of the spring is four, and the four springs are fixed between the placing rack and the placing box.

[0009] Preferably, the bottom of the placing box is fixedly connected with the electric push rod, one end of the electric push rod is fixedly connected with the box door, the inside of the placing box is provided with the discharging hole, the number of the discharging hole is multiple, and the multiple discharging holes are equidistantly arranged at the bottom of the placing box.

[0010] Preferably, the placing box is telescopically connected with the box door through the electric push rod, the number of the electric push rod is two, and the two electric push rods are symmetrically arranged with the horizontal center line of the placing box as the axis of symmetry.

[0011] Preferably, the heating furnace subassembly comprises the connecting box, one side of the connecting box is fixedly connected with the heating furnace body, one side of the cooling furnace is fixedly connected with the hydraulic cylinder, one end of the hydraulic cylinder is fixedly connected with the sealing door, the cooling furnace is telescopically connected with the sealing door through the hydraulic cylinder, and the output end of the hydraulic cylinder is connected with the top of the sealing door.

[0012] Preferably, the heating furnace body is fixedly connected with the cooling furnace through the connecting box, and the connecting box is arranged between the heating furnace body and the cooling furnace.

[0013] Compared with the prior art, the utility model has the advantages that the diffusion furnace for the surface diffusion of heavy rare earth of neodymium iron boron permanent magnet,

[0014] (1) A motor is provided to drive the turntable to rotate, so that the turntable can be extended and retracted back and forth by the folding rod driving the slide bar, so that the slide bar can push the placement rack back and forth, so that the placement box can be rocked back and forth in the placement rack by the spring for screening. At this time, the electric push rod can be started to drive the box door to open, so that the excess diffusant adhering to the surface can be screened out from the discharge hole, which can improve the need for cleaning the excess adhering diffusant after screening;

[0015] (2) By starting the hydraulic cylinder in the cooling furnace, the sealing door can open the connecting channel between the heating furnace body and the cooling furnace. The conveyor in the heating furnace body transports the NdFeB into the heating furnace body. The hydraulic cylinder pushes the sealing door to seal the connecting box. The heating furnace body is set to heat the NdFeB. The diffusing agent undergoes diffusion heat treatment to allow the heavy rare earth elements to penetrate into the interior of the magnet, which increases the need for processing the surface of the NdFeB. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the heating furnace and cooling furnace of the utility model;

[0018] Figure 3 This is a schematic diagram of the cooling furnace and placement box structure of the utility model;

[0019] Figure 4 This is a structural diagram of the placement box and placement rack of the utility model.

[0020] In the figure: 1. Base; 2. Cooling furnace; 3. Furnace door; 4. Material shaking assembly; 401. Belt conveyor; 402. Baffle; 403. Motor; 404. Turntable; 405. Folding rod; 406. Slide rod; 407. Placement rack; 408. Spring; 409. Placement box; 410. Electric push rod; 411. Box door; 412. Feeding hole; 5. Heating furnace assembly; 501. Connection box; 502. Heating furnace body; 503. Hydraulic cylinder; 504. Sealing door. DETAILED DESCRIPTION

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0022] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment nor are they necessarily mutually exclusive or alternative embodiments. It is expressly understood that the embodiments described herein can be combined with each other in their various permutations and combinations.

[0023] The utility model embodiment provides a diffusion furnace for neodymium iron boron permanent magnet surface diffusion heavy rare earth, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, it includes a base 1, the top of the base 1 is fixedly connected to a cooling furnace 2, and a furnace door 3 is movably connected to one side of the cooling furnace 2, a material shaking assembly 4 is provided inside the cooling furnace 2, and the top of the base 1 is fixedly connected to a heating furnace assembly 5; the material shaking assembly 4 includes a belt conveyor 401; the top of the belt conveyor 401 is fixedly connected to a baffle 402; the top of the belt conveyor 401 is fixedly connected to a motor 403; and the output shaft of the motor 403 is fixedly connected to a turntable 404 through a coupling; one side of the turntable 404 is movably connected to a folding rod 405; and one end of the folding rod 405 is movably connected to a sliding rod 406; the turntable 404 forms a movable structure through the folding rod 405 and the sliding rod 406. The folding rod 405 is arranged between the turntable 404 and the slide bar 406, which strengthens the connection effect between the turntable 404 and the folding rod 405, so that the motor 403 can rely on the turntable 404 to drive the folding rod 405 to rotate, and the folding rod 405 can drive the slide bar 406 to slide back and forth; a placement rack 407 is placed on the top of the belt conveyor 401; and a spring 408 is fixedly connected to the top of the placement rack 407; a placement box 409 is fixedly connected to the top of the spring 408; the placement rack 407 forms an elastic structure with the placement box 409 through the spring 408, and the number of springs 408 is four, and the four springs 408 are respectively fixed between the placement rack 407 and the placement box 409. , strengthens the connection effect between the placement rack 407 and the spring 408, so that the placement rack 407 can support the placement box 409 by relying on the spring 408; the bottom of the placement box 409 is fixedly connected to an electric push rod 410, and one end of the electric push rod 410 is fixedly connected to the box door 411; the placement box 409 forms a telescopic structure with the electric push rod 410 and the box door 411, and the number of the electric push rods 410 is two, and the two electric push rods 410 are symmetrically arranged with the horizontal center line of the placement box 409 as the symmetry axis, which strengthens the connection effect between the placement box 409 and the electric push rod 410, so that the electric push rod 410 can pull the box door 411 under the support of the placement box 409. Move; a discharge hole 412 is opened inside the placement box 409, and there are multiple discharge holes 412, and multiple discharge holes 412 are evenly spaced at the bottom of the placement box 409. By starting the motor 403 to drive the turntable 404 to rotate, the turntable 404 can rely on the folding rod 405 to drive the slide rod 406 to extend and retract back and forth, and the slide rod 406 can push the placement rack 407 back and forth, so that the placement box 409 can rely on the spring 408 to rock back and forth in the placement rack 407 for screening. At this time, the electric push rod 410 can be started to drive the box door 411 to open, so that the excess diffusant on the adhesion surface can be screened out through the discharge hole 412.

[0024] In a further preferred embodiment of the present invention, Figure 1 、 Figure 2 、 Figure 3and Figure 4 As shown, the heating furnace assembly 5 includes a connecting box 501, one side of the connecting box 501 is fixedly connected to the heating furnace body 502, the heating furnace body 502 forms a fixed structure with the cooling furnace 2 through the connecting box 501, and the connection effect between the connecting box 501, the heating furnace body 502 and the cooling furnace 2 is strengthened, so that the connecting box 501 can be connected with the cooling furnace 2 by relying on the heating furnace body 502, one side of the cooling furnace 2 is fixedly connected to a hydraulic cylinder 503, and one end of the hydraulic cylinder 503 is fixedly connected to a sealing door 504, the cooling furnace 2 forms a telescopic structure with the sealing door 504 through the hydraulic cylinder 503, and the output end of the hydraulic cylinder 503 is connected to the top of the sealing door 504, which strengthens the connection effect between the cooling furnace 2 and the hydraulic cylinder 503, so that the hydraulic cylinder 503 can rely on the cooling furnace 2 to pull the sealing door 504 downward or upward, and move by starting the belt conveyor 401. The belt conveyor 401 can move the placement rack 407, and the placement rack 407 can drive the placement box 409 to move. At this time, the hydraulic cylinder 503 in the cooling furnace 2 can be started, so that the hydraulic cylinder 503 can drive the sealing door 504 to move, and the sealing door 504 can open the connection channel between the heating furnace body 502 and the cooling furnace 2. At this time, after the placement rack 407 passes through one side of the connection box 501, the NdFeB can be transported to the heating furnace body 502 by the conveyor in the heating furnace body 502. At this time, the sealing door 504 can be pushed by the hydraulic cylinder 503 to seal the connection box 501. In addition, the NdFeB can be heated by the set heating furnace body 502, so that the diffusing agent can penetrate into the interior of the magnet through diffusion heat treatment. In addition, after processing, the NdFeB can be transported to the connection box 501 by the conveyor in the heating furnace body 502.

[0025] Working principle: With the support of the base 1, it can be used to support and limit the cooling furnace 2 and the heating furnace body 502. When processing NdFeB, the furnace door 3 can be opened first, and the NdFeB can be placed in the placement box 409. At this time, the diffusing agent can be added into the placement box 409. At this time, the surface of the NdFeB can be coated with the diffusing agent. At this time, the belt conveyor 401 can be started to move, and the belt conveyor 401 can drive the placement rack 407 to move. The placement rack 407 can drive the placement box 409 to move. At this time, the hydraulic cylinder 503 in the cooling furnace 2 can be started to drive the sealing door 504 to move, so that the sealing door 504 can open the connection channel between the heating furnace body 502 and the cooling furnace 2. At this time, the placement rack 407 can pass through one side of the connection box 501, and the NdFeB can be transported to the heating furnace body 502 by the conveyor in the heating furnace body 502. At this time, the hydraulic cylinder 5 03 can push the sealing door 504 to seal the connection box 501. In addition, the NdFeB can be heated by the heating furnace body 502, so that the diffusion agent can be diffused and heat treated to allow the heavy rare earth elements to penetrate into the magnet. In addition, after processing, the NdFeB can be transported to the connection box 501 by the conveyor in the heating furnace body 502, so that the placement rack 407 can be moved to the belt conveyor 401, and then the placement rack 407 can be moved to the cooling furnace 2. By starting the motor 403 to drive the turntable 404 to rotate, the turntable 404 can rely on the folding rod 405 to drive the sliding rod 406 to extend and retract back and forth, and the sliding rod 406 can push the placement rack 407 back and forth, so that the placement box 409 can rely on the spring 408 to rock back and forth in the placement rack 407 for screening. At this time, the electric push rod 410 can be started to drive the box door 411 to open, so that the excess diffusant adhering to the surface can be screened out through the discharge hole 412.

[0026] It should be noted that the above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A diffusion furnace for diffusing heavy rare earth on the surface of NdFeB permanent magnets, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a cooling furnace (2), and a furnace door (3) is movably connected to one side of the cooling furnace (2); a material shaking assembly (4) is provided inside the cooling furnace (2); and the top of the base (1) is fixedly connected to a heating furnace assembly (5); The shaking material assembly (4) includes a belt conveyor (401); a baffle (402) is fixedly connected to the top of the belt conveyor (401); a motor (403) is fixedly connected to the top of the belt conveyor (401); and the output shaft of the motor (403) is fixedly connected to a turntable (404) through a coupling; one side of the turntable (404) is movably connected to a folding rod (405); and one end of the folding rod (405) is movably connected to a sliding rod (406); a placement rack (407) is placed on the top of the belt conveyor (401); and a spring (408) is fixedly connected to the top of the placement rack (407); and the top of the spring (408) is fixedly connected to a placement box (409).

2. The diffusion furnace for diffusing heavy rare earth on the surface of NdFeB permanent magnets according to claim 1, characterized in that: The rotating disk (404) forms a movable structure through a folding rod (405) and a sliding rod (406), and the folding rod (405) is arranged between the rotating disk (404) and the sliding rod (406).

3. The diffusion furnace for diffusing heavy rare earth on the surface of NdFeB permanent magnets according to claim 1, characterized in that: The placement rack (407) forms an elastic structure through the spring (408) and the placement box (409), and the number of the springs (408) is four, and the four springs (408) are respectively fixed between the placement rack (407) and the placement box (409).

4. The diffusion furnace for diffusing heavy rare earth on the surface of NdFeB permanent magnets according to claim 1, characterized in that: The bottom of the placement box (409) is fixedly connected to an electric push rod (410), and one end of the electric push rod (410) is fixedly connected to a box door (411). A discharge hole (412) is opened inside the placement box (409). There are multiple discharge holes (412), and the multiple discharge holes (412) are evenly spaced at the bottom of the placement box (409).

5. The diffusion furnace for diffusing heavy rare earth on the surface of NdFeB permanent magnets according to claim 4, characterized in that: The placement box (409) forms a telescopic structure through an electric push rod (410) and a box door (411), and the number of the electric push rods (410) is two, and the two electric push rods (410) are symmetrically arranged with the horizontal center line of the placement box (409) as the symmetry axis.

6. The diffusion furnace for diffusing heavy rare earth on the surface of NdFeB permanent magnets according to claim 1, characterized in that: The heating furnace assembly (5) comprises a connection box (501), one side of the connection box (501) is fixedly connected to a heating furnace body (502), one side of the cooling furnace (2) is fixedly connected to a hydraulic cylinder (503), and one end of the hydraulic cylinder (503) is fixedly connected to a sealing door (504), the cooling furnace (2) forms a telescopic structure through the hydraulic cylinder (503) and the sealing door (504), and the output end of the hydraulic cylinder (503) is connected to the top of the sealing door (504).

7. The diffusion furnace for diffusing heavy rare earth on the surface of NdFeB permanent magnets according to claim 6, characterized in that: The heating furnace body (502) forms a fixed structure with the cooling furnace (2) through the connection box (501), and the connection box (501), the heating furnace body (502) and the cooling furnace (2) are connected.

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