Neodymium-iron-boron permanent magnet magnetic flux accurate adjusting equipment and preparation method thereof

Abstract

The invention discloses neodymium iron boron permanent magnet magnetic flux accurate adjusting equipment and a preparation method thereof, and relates to the technical field of neodymium iron boron, the neodymium iron boron permanent magnet magnetic flux accurate adjusting equipment comprises a bottom plate, a bracket is fixedly installed in the middle of the top surface of the bottom plate, a rotating disc is arranged on the top surface of the bracket, and a plurality of sets of coils are installed on the rotating disc; the device further comprises an adjusting assembly, a control assembly and an extrusion assembly, the adjusting assembly is arranged on the rotating disc and used for rotating the rotating disc, the control assembly is arranged on the fixing plate and used for placing a storage plate, and the extrusion assembly is arranged on the fixing plate and used for being matched with the storage plate for use. The device is reasonable in structure, different coils are selected through the adjusting assembly according to the flux, and then neodymium iron boron in the storage barrel can be accurately adjusted one by one through the control assembly and the extrusion assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of NdFeB, and in particular to a device for precisely regulating the magnetic flux of a NdFeB permanent magnet and a preparation method thereof. Background Art

[0002] Neodymium iron boron (NdFeB), also known as NdFeB magnets, is a tetragonal crystal composed of neodymium, iron, and boron. It is a rare earth permanent magnet material. It is the second strongest permanent magnet in magnetism today after the holmium magnet at absolute zero, and is also the most commonly used rare earth magnet. Due to its excellent properties of high remanence, high coercivity, and high magnetic energy product, it is widely used in permanent magnetic field devices and equipment such as electroacoustics, telecommunications, motors, instrumentation, nuclear magnetic resonance, magnetic levitation, and magnetic sealing. It is particularly suitable for the manufacture of various high-performance products, such as VCM plates for optical drive motors, anisotropic magnets in the acoustic field, spiral magnets in oil exploration drilling rigs, and various sizes and shapes of permanent magnet motors.

[0003] When precisely adjusting the flux of NdFeB, it is necessary to manually separate the NdFeB and place them one by one, then select a suitable measuring coil and energize it, and then manually place the NdFeB one by one inside the coil to precisely adjust the flux. This adjustment method requires manual placement of the NdFeB one by one, which is very inefficient. Summary of the Invention

[0004] The purpose of this application is to provide a device for precisely adjusting the magnetic flux of a neodymium iron boron permanent magnet and a preparation method thereof, by selecting different coils according to the size of the flux through an adjustment component, and then facilitating the precise adjustment of the neodymium iron boron inside the storage tube one by one through a control component and an extrusion component.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a device for precisely adjusting the magnetic flux of a neodymium iron boron permanent magnet and a preparation method thereof, comprising a base plate, a bracket fixedly installed at the middle position of the top surface of the base plate, a turntable provided at the top surface of the bracket, and several groups of coils installed on the turntable; further comprising an adjustment component, a control component and an extrusion component, the adjustment component being arranged on the turntable for rotating the turntable, the control component being arranged on a fixed plate for placing a storage plate, and the extrusion component being arranged on the fixed plate for use in conjunction with the storage plate.

[0006] Preferably, the adjustment assembly includes a main shaft fixedly connected to the turntable, the bottom end of the main shaft is rotatably connected to the base plate, the middle position of the main shaft is fixedly connected to a gear, the gear is meshed with a tooth plate, and the two ends of the opposite side of the tooth plate are fixedly connected to a sleeve.

[0007] Preferably, the sleeve is slidably connected to the cross bar, one end of the cross bar is fixedly connected to the first axle seat, the bottom end of the first axle seat is fixedly connected to the base plate, the other end of the cross bar is fixedly connected to the sleeve block, and a first spring is sleeved on the cross bar, and the two ends of the first spring are respectively fixedly connected to one side of the sleeve and one side of the sleeve block.

[0008] Preferably, a horizontal plate is fixedly connected to the middle position of the tooth plate, a second shaft seat is fixedly connected to the horizontal plate, a rotating rod is fixedly connected to the second shaft seat, one end of the rotating rod is fixedly connected to a retaining ring, a sleeve is sleeved on the rotating rod, a handle is fixedly connected to the surface of the sleeve, one end of the sleeve is fixedly connected to a side ring, a second spring is sleeved on the rotating rod, and both ends of the second spring are fixedly connected to one side of the retaining ring and one side of the side ring respectively.

[0009] Preferably, a bracket is fixedly connected to the base plate, a positioning plate is fixedly connected to the bracket, a slide groove is provided at the horizontal position of the positioning plate, and a plurality of card slots are provided at the longitudinal position of the positioning plate, and the card slots are connected to the slide grooves.

[0010] Preferably, the control component includes a fixed plate fixedly mounted on the base plate, a console fixedly connected to the rear position of the fixed plate, a pair of arm plates fixedly connected to the surface position of the fixed plate, the other ends of the pair of arm plates fixedly connected to docking columns, the bottom ends of the docking columns fixedly connected to a frame, and side columns fixedly connected to both sides of the frame.

[0011] Preferably, the side column is fixedly connected to a side plate, both ends of the side plate are fixedly connected to a column, a limit plate is fixedly connected to the column, the other end of the limit plate is rotatably connected to a rotating shaft, the rotating shaft is rotatably connected to a limit wheel, the limit wheel is affixed to the storage plate, a plurality of groups of circular holes are opened on the storage plate, a storage tube is inserted into the inside of the circular hole, the top end of the storage tube is fixedly connected to an edge, a third spring is sleeved on the storage tube, and the two ends of the third spring are respectively fixedly connected to the bottom surface of the edge and the top surface of the storage plate.

[0012] Preferably, the extrusion assembly includes a driving motor fixedly mounted on the fixed plate, the output end of the driving motor is fixedly connected to a driven rod, one end of the driven rod is fixedly connected to a disc, a pin is fixedly connected to the disc, the other end of the pin is rotatably connected to the linkage plate, the other end of the linkage plate is rotatably connected to a hinge seat, and the hinge seat is fixedly connected to the top position of the movable plate.

[0013] Preferably, a slider is fixedly connected to the inner side of the movable plate, the slider is slidably connected to the slide rail, the slide rail is fixedly connected to the fixed plate, a mounting plate is fixedly connected to the middle position of the surface of the movable plate, and a pair of pressure plates are fixedly connected to the mounting plate.

[0014] The present invention also provides a method for preparing a NdFeB permanent magnet by precisely adjusting the magnetic flux, comprising:

[0015] S1. First, place the NdFeB magnets one by one inside the storage tube, then rotate the turntable according to the size of the magnetic flux and select the appropriate coil. At this time, the coil is in the power-on mode;

[0016] S2. When the storage cylinder moves to the bottom of the pressure plate, the pressure plate will squeeze the edge of the top of the storage cylinder, so that the bottom of the storage cylinder can move into the inside of the coil, so as to facilitate the precise adjustment of the flux of the NdFeB.

[0017] In summary, the present invention has the following beneficial effects:

[0018] 1. The present invention has a reasonable structure. When the turntable needs to be rotated, a handle is provided inside the card slot. The handle is first rotated to move the handle into the inside of the slide slot, and then the handle is pulled. The sleeve slides on the rotating rod by pulling the handle. The movement of the handle moves the tooth plate on the cross plate through the rotating rod. The movement of the tooth plate causes the sleeve to slide on the cross bar, thereby increasing the stability of the tooth plate movement. The movement of the tooth plate causes the gear to rotate, thereby facilitating the rotation of the turntable on the main shaft, thereby facilitating the selection of the coil.

[0019] 2. In the present invention, the NdFeB magnets are first placed one by one inside the storage tube. An arm plate is fixedly connected to the fixed plate, and a docking post is fixedly connected to the arm plate. A frame is installed on the docking post. The frame is arranged on both sides of the storage plate and is attached to both sides of the storage plate through limiting wheels, thereby facilitating the positioning of the storage plate. The limiting wheels rotate by pulling the storage plate, thereby increasing the stability of the storage plate movement.

[0020] 3. In the present invention, when the storage tube on the storage plate moves to the position below the pressure plate, the driving motor operates to rotate the driven rod, and the rotation of the driven rod causes the disc to rotate. The rotation of the disc pushes the hinge seat to move through the linkage plate on the pin column. The hinge seat is fixedly connected to the movable plate. The movement of the movable plate causes the slider to slide on the slide rail, thereby increasing the stability of the movement of the movable plate. The movement of the movable plate causes the pressure plate on the mounting plate to squeeze the storage tube, thereby facilitating the movement of the neodymium iron boron inside the storage tube to the inside of the coil for adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the rear-view three-dimensional structure of the bottom plate;

[0023] Figure 2 Schematic diagram of the three-dimensional structure of the base plate;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the bottom plate from the side;

[0025] Figure 4 is a schematic diagram of the main axis three-dimensional structure;

[0026] Figure 5 Schematic diagram of the three-dimensional structure of the fixed plate;

[0027] Figure 6 Schematic diagram of the three-dimensional structure of the frame;

[0028] Figure 7 Schematic diagram of the three-dimensional structure of the movable plate;

[0029] Figure 8 for Figure 4 Enlarged structural diagram at point A in the middle.

[0030] In the figure: 1. bottom plate; 101. bracket; 102. turntable; 103. coil; 2. main shaft; 201. gear; 202. tooth plate; 203. sleeve; 204. cross bar; 205. first shaft seat; 206. sleeve block; 207. first spring; 208. cross plate; 209. second shaft seat; 210. rotating rod; 211. snap ring; 212. sleeve; 213. handle; 214. side ring; 215. second spring; 216. bracket; 217. positioning plate; 218. slide groove; 219. slot; 3. fixing plate; 301. control Platform; 302, arm plate; 303, docking column; 304, frame; 305, side column; 306, side plate; 307, column; 308, limit plate; 309, rotating shaft; 310, limit wheel; 311, storage plate; 312, round hole; 313, storage tube; 314, edge; 315, third spring; 4, drive motor; 401, driven rod; 402, disc; 403, pin; 404, linkage plate; 405, hinged seat; 406, movable plate; 407, slider; 408, slide rail; 409, mounting plate; 410, pressure plate. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example: Reference Figure 1 - Figure 8 The device for precisely adjusting the magnetic flux of a neodymium iron boron permanent magnet and its preparation method are shown, comprising a base plate 1, a bracket 101 fixedly mounted in the middle of the top surface of the base plate 1, a turntable 102 provided on the top surface of the bracket 101, and several groups of coils 103 installed on the turntable 102; the device also comprises an adjustment component, a control component and an extrusion component, the adjustment component being arranged on the turntable 102 for rotating the turntable 102, the control component being arranged on the fixed plate 3 for placing a placement plate 311, and the extrusion component being arranged on the fixed plate 3 for use in conjunction with the placement plate 311.

[0033] Specifically, it should be noted that the drive motor 4 is electrically connected to the control panel via a wire, and the specific working principles thereof are referenced from the prior art and will not be described in detail herein. The storage tube 313 is made of acrylic material.

[0034] As an implementation method in this embodiment, the adjustment component includes a main shaft 2 fixedly connected to the turntable 102, the bottom end of the main shaft 2 is rotatably connected to the base plate 1, the middle position of the main shaft 2 is fixedly connected to the gear 201, the gear 201 is meshed with a tooth plate 202, the two ends of the opposite side of the tooth plate 202 are fixedly connected to a sleeve 203, the sleeve 203 is slidably connected to the cross bar 204, one end of the cross bar 204 is fixedly connected to the first shaft seat 205, the bottom end of the first shaft seat 205 is fixedly connected to the base plate 1, the other end of the cross bar 204 is fixedly connected to a sleeve block 206, a first spring 207 is sleeved on the cross bar 204, the two ends of the first spring 207 are respectively fixedly connected to one side of the sleeve 203 and one side of the sleeve block 206, the middle position of the tooth plate 202 is fixedly connected to the cross plate 208, a second shaft seat 209 is fixedly connected to the horizontal plate 208, and a rotating rod 210 is fixedly connected to the second shaft seat 209. One end of the rotating rod 210 is fixedly connected to a snap ring 211, and a sleeve 212 is sleeved on the rotating rod 210. A handle 213 is fixedly connected to the surface of the sleeve 212, and one end of the sleeve 212 is fixedly connected to a side ring 214. A second spring 215 is sleeved on the rotating rod 210, and the two ends of the second spring 215 are respectively fixedly connected to one side of the snap ring 211 and one side of the side ring 214. A bracket 216 is fixedly connected to the bottom plate 1, and a positioning plate 217 is fixedly connected to the bracket 216. A sliding groove 218 is opened in the horizontal position of the positioning plate 217, and a plurality of groups of card grooves 219 are opened in the longitudinal position of the positioning plate 217. The card grooves 219 and the sliding grooves 218 are connected to each other.

[0035] Specifically, when the turntable 102 needs to be rotated, a handle 213 is provided inside the slot 219. First, the handle 213 is rotated to move the handle 213 to the inside of the slide slot 218, and then the handle 213 is pulled. The sleeve 212 slides on the rotating rod 210 by pulling the handle 213. The movement of the handle 213 moves the tooth plate 202 on the cross plate 208 through the rotating rod 210. The movement of the tooth plate 202 causes the sleeve 203 to slide on the cross bar 204, increasing the stability of the movement of the tooth plate 202. The movement of the tooth plate 202 causes the gear 201 to rotate, thereby facilitating the rotation of the turntable 102 on the main shaft 2, thereby facilitating the selection of the coil 103.

[0036] As an implementation method in this embodiment, the control component includes a fixed plate 3 fixedly mounted on the base plate 1, a console 301 is fixedly connected to the rear side of the fixed plate 3, a pair of arm plates 302 are fixedly connected to the surface of the fixed plate 3, the other ends of the pair of arm plates 302 are fixedly connected to the docking column 303, the bottom end of the docking column 303 is fixedly connected to the frame 304, the two sides of the frame 304 are fixedly connected to the side columns 305, the side columns 305 are fixedly connected to the side panels 306, the two ends of the side panels 306 are fixedly connected to the columns 307, and the columns 308 are fixedly connected to the side panels 309. 07 is fixedly connected to a limit plate 308, and the other end of the limit plate 308 is rotatably connected to a rotating shaft 309, and the rotating shaft 309 is rotatably connected to a limit wheel 310, and the limit wheel 310 is affixed to the storage plate 311, and a plurality of groups of circular holes 312 are opened on the storage plate 311, and a storage tube 313 is inserted into the inside of the circular hole 312, and the top of the storage tube 313 is fixedly connected to the edge 314, and a third spring 315 is sleeved on the storage tube 313, and the two ends of the third spring 315 are respectively fixedly connected to the bottom surface of the edge 314 and the top surface of the storage plate 311.

[0037] Specifically, the NdFeB magnets are first placed one by one inside the storage tube 313, and the arm plate 302 is fixedly connected to the fixed plate 3, and the arm plate 302 is fixedly connected to the docking column 303. A frame 304 is installed on the docking column 303. The frame 304 is set on both sides of the storage plate 311 and is attached to both sides of the storage plate 311 through the limiting wheels 310, so as to facilitate the positioning of the storage plate 311. The limiting wheels 310 are rotated by pulling the storage plate 311, thereby increasing the stability of the movement of the storage plate 311.

[0038] As an implementation method in this embodiment, the extrusion assembly includes a driving motor 4 fixedly mounted on the fixed plate 3, the output end of the driving motor 4 is fixedly connected to the driven rod 401, one end of the driven rod 401 is fixedly connected to the disc 402, the disc 402 is fixedly connected to the pin 403, the other end of the pin 403 is rotatably connected to the linkage plate 404, the other end of the linkage plate 404 is rotatably connected to the hinge seat 405, the hinge seat 405 is fixedly connected to the top position of the movable plate 406, the inner side of the movable plate 406 is fixedly connected to the slider 407, the slider 407 is slidably connected to the slide rail 408, the slide rail 408 is fixedly connected to the fixed plate 3, the middle position of the surface of the movable plate 406 is fixedly connected to the mounting plate 409, and a pair of pressure plates 410 are fixedly connected to the mounting plate 409.

[0039] Specifically, when the storage tube 313 on the storage plate 311 moves to the position below the pressure plate 410, the driving motor 4 operates to rotate the driven rod 401, and the rotation of the driven rod 401 causes the disc 402 to rotate. The rotation of the disc 402 pushes the hinge seat 405 to move through the linkage plate 404 on the pin 403. The hinge seat 405 is fixedly connected to the movable plate 406. The movement of the movable plate 406 causes the slider 407 to slide on the slide rail 408, thereby increasing the stability of the movement of the movable plate 406. The movement of the movable plate 406 causes the pressure plate 410 on the mounting plate 409 to squeeze the storage tube 313, thereby facilitating the movement of the neodymium iron boron inside the storage tube 313 to the inside of the coil 103 for adjustment.

[0040] The working principle of the present invention is as follows: when the turntable 102 needs to be rotated, a handle 213 is provided inside the card slot 219. The handle 213 is first rotated to move the handle 213 into the inside of the slide slot 218, and then the handle 213 is pulled. The pulling of the handle 213 causes the sleeve 212 to slide on the rotating rod 210. The movement of the handle 213 causes the tooth plate 202 on the cross plate 208 to move through the rotating rod 210. The movement of the tooth plate 202 causes the sleeve 203 to slide on the cross bar 204, thereby increasing the stability of the movement of the tooth plate 202. The movement of the tooth plate 202 causes the gear 201 to rotate, thereby facilitating the rotation of the turntable 102 on the main shaft 2, thereby facilitating the selection of the coil 103.

[0041] First, the NdFeB magnets are placed one by one inside the storage tube 313. The arm plate 302 is fixedly connected to the fixed plate 3, and the docking post 303 is fixedly connected to the arm plate 302. The frame 304 is installed on the docking post 303. The frame 304 is placed on both sides of the storage plate 311 and is attached to both sides of the storage plate 311 via the limiting wheels 310, thereby facilitating the positioning of the storage plate 311. The limiting wheels 310 rotate when the storage plate 311 is pulled, thereby increasing the stability of the movement of the storage plate 311.

[0042] When the storage tube 313 on the storage plate 311 moves to the position below the pressure plate 410, the driving motor 4 operates to rotate the driven rod 401, and the rotation of the driven rod 401 causes the disc 402 to rotate. The rotation of the disc 402 pushes the hinge seat 405 to move through the linkage plate 404 on the pin 403. The hinge seat 405 is fixedly connected to the movable plate 406. The movement of the movable plate 406 causes the slider 407 to slide on the slide rail 408, thereby increasing the stability of the movement of the movable plate 406. The movement of the movable plate 406 causes the pressure plate 410 on the mounting plate 409 to squeeze the storage tube 313, thereby facilitating the movement of the neodymium iron boron inside the storage tube 313 to the inside of the coil 103 for adjustment.

[0043] The present invention also provides a method for preparing a NdFeB permanent magnet by precisely adjusting the magnetic flux, comprising:

[0044] S1. First, place the NdFeB magnets one by one inside the storage tube 313, then rotate the turntable 102 according to the size of the magnetic flux and select the appropriate coil 103. At this time, the coil 103 is in the power-on mode.

[0045] S2. When the storage cylinder 313 moves to the bottom of the pressure plate 410, the pressure plate 410 will squeeze the edge 314 at the top of the storage cylinder 313, so that the bottom of the storage cylinder 313 can move into the inside of the coil 103, thereby facilitating the precise adjustment of the flux of the NdFeB magnet.

[0046] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for precisely adjusting the magnetic flux of a neodymium iron boron permanent magnet, characterized in that: include A bottom plate (1), a bracket (101) is fixedly mounted at the middle of the top surface of the bottom plate (1), a turntable (102) is provided at the top surface of the bracket (101), and a plurality of coils (103) are mounted on the turntable (102); It also includes an adjustment component, a control component, and an extrusion component. The adjustment component is arranged on the turntable (102) for rotating the turntable (102), the control component is arranged on the fixed plate (3) for placing the storage plate (311), and the extrusion component is arranged on the fixed plate (3) for use in conjunction with the storage plate (311).

2. The NdFeB permanent magnet magnetic flux precision adjustment device according to claim 1, characterized in that: The adjustment assembly comprises a main shaft (2) fixedly connected to the turntable (102), the bottom end of the main shaft (2) being rotatably connected to the bottom plate (1), a gear (201) being fixedly connected to the middle position of the main shaft (2), a toothed plate (202) being meshed with the gear (201), and sleeves (203) being fixedly connected to the two ends of the opposite side of the toothed plate (202).

3. The NdFeB permanent magnet magnetic flux precision adjustment device according to claim 2, characterized in that: The sleeve (203) is slidably connected to the cross bar (204), one end of the cross bar (204) is fixedly connected to the first shaft seat (205), the bottom end of the first shaft seat (205) is fixedly connected to the bottom plate (1), the other end of the cross bar (204) is fixedly connected to the sleeve block (206), and the cross bar (204) is sleeved with a first spring (207), and the two ends of the first spring (207) are respectively fixedly connected to one side of the sleeve (203) and one side of the sleeve block (206).

4. The NdFeB permanent magnet magnetic flux precision adjustment device according to claim 3, characterized in that: A transverse plate (208) is fixedly connected to the middle position of the tooth plate (202), a second shaft seat (209) is fixedly connected to the transverse plate (208), a rotating rod (210) is fixedly connected to the second shaft seat (209), one end of the rotating rod (210) is fixedly connected to a snap ring (211), a sleeve (212) is sleeved on the rotating rod (210), a handle (213) is fixedly connected to the surface of the sleeve (212), one end of the sleeve (212) is fixedly connected to a side ring (214), a second spring (215) is sleeved on the rotating rod (210), and two ends of the second spring (215) are fixedly connected to one side of the snap ring (211) and one side of the side ring (214), respectively.

5. The NdFeB permanent magnet magnetic flux precision adjustment device according to claim 4, characterized in that: A bracket (216) is fixedly connected to the bottom plate (1), a positioning plate (217) is fixedly connected to the bracket (216), a sliding groove (218) is provided at a transverse position of the positioning plate (217), and a plurality of groups of card slots (219) are provided at a longitudinal position of the positioning plate (217), and the card slots (219) and the sliding grooves (218) are communicated with each other.

6. The NdFeB permanent magnet magnetic flux precision adjustment device according to claim 1, characterized in that: The control assembly comprises a fixing plate (3) fixedly mounted on the base plate (1); a console (301) is fixedly connected to the rear side of the fixing plate (3); a pair of arm plates (302) are fixedly connected to the surface of the fixing plate (3); the other ends of the pair of arm plates (302) are fixedly connected to docking columns (303); the bottom ends of the docking columns (303) are fixedly connected to a frame (304); and side columns (305) are fixedly connected to both sides of the frame (304).

7. The NdFeB permanent magnet magnetic flux precision adjustment device according to claim 6, characterized in that: The side column (305) is fixedly connected to a side plate (306), and both ends of the side plate (306) are fixedly connected to a column (307). The column (307) is fixedly connected to a limit plate (308), and the other end of the limit plate (308) is rotatably connected to a rotating shaft (309). The rotating shaft (309) is rotatably connected to a limit wheel (310), and the limit wheel (310) is attached to the storage plate (311). The storage plate (311) is provided with a plurality of circular holes (312), a storage tube (313) is inserted into the circular hole (312), the top end of the storage tube (313) is fixedly connected to the edge (314), a third spring (315) is sleeved on the storage tube (313), and the two ends of the third spring (315) are respectively fixedly connected to the bottom surface of the edge (314) and the top surface of the storage plate (311).

8. The NdFeB permanent magnet magnetic flux precision adjustment device according to claim 6, characterized in that: The extrusion assembly comprises a driving motor (4) fixedly mounted on the fixed plate (3); an output end of the driving motor (4) is fixedly connected to a driven rod (401); one end of the driven rod (401) is fixedly connected to a disk (402); a pin (403) is fixedly connected to the disk (402); the other end of the pin (403) is rotatably connected to a linkage plate (404); the other end of the linkage plate (404) is rotatably connected to a hinge seat (405); and the hinge seat (405) is fixedly connected to the top position of the movable plate (406).

9. The NdFeB permanent magnet magnetic flux precision adjustment device according to claim 8, characterized in that: A slider (407) is fixedly connected to the inner side of the movable plate (406), and the slider (407) is slidably connected to a slide rail (408). The slide rail (408) is fixedly connected to the fixed plate (3). A mounting plate (409) is fixedly connected to the middle position of the surface of the movable plate (406), and a pair of pressure plates (410) are fixedly connected to the mounting plate (409).

10. A method for preparing a NdFeB permanent magnet with precise magnetic flux adjustment, based on any one of claims 1 to 9, comprising: S1. First, NdFeB magnets are placed one by one inside the storage cylinder (313), and then the turntable (102) is rotated according to the magnitude of the magnetic flux, and a suitable coil (103) is selected. At this time, the coil (103) is in the power-on mode; S2. When the storage cylinder (313) moves to the bottom of the pressure plate (410), the pressure plate (410) presses the edge (314) at the top of the storage cylinder (313), thereby facilitating the bottom of the storage cylinder (313) to move into the interior of the coil (103), thereby facilitating the precise adjustment of the flux of the NdFeB magnet.

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