Surface treatment device for neodymium iron boron rare earth permanent magnet

Abstract

The invention provides a neodymium iron boron rare earth permanent magnet surface treatment device, and relates to the technical field of surface polishing machining.The surface treatment device body comprises a frame, a driving mechanism, a top-layer polishing mechanism and a bottom-layer polishing mechanism, a driving shaft is inserted in the middle of the driving mechanism in a penetrating mode, and the driving shaft penetrates through the surface of a top plate of the frame; the tail end of the driving shaft is embedded into the inner side of a bottom plate of the frame through a bearing, the top layer clamping assembly is inserted into the lower portion of a top plate of the frame in a penetrating mode, and the top layer polishing mechanism is arranged on the surface of the top layer clamping assembly in a sleeving mode. Therefore, the whole surface can be covered only by turning over the surface once in the whole machining process, the machining efficiency is improved, center positioning of the neodymium-iron-boron rare earth permanent magnet can be automatically achieved when the neodymium-iron-boron rare earth permanent magnet is placed, and the polishing accuracy and stability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of surface polishing, in particular to a surface treatment device for a neodymium iron boron rare earth permanent magnet. Background Art

[0002] NdFeB rare earth permanent magnet material is an alloy formed by rare earth metals and transition metals, which has extremely strong magnetism and can maintain it for a long time. This material belongs to the third generation of rare earth permanent magnet materials. The emergence and development of NdFeB permanent magnet materials, especially their application in the field of electronics, has promoted the upsurge of NdFeB electroplating. This material not only has high coercivity and high magnetic energy product, but also has received unprecedented attention and use in various fields due to its high performance and relatively low cost. During the production and manufacturing process of NdFeB rare earth permanent magnets, their surface needs to be polished to facilitate the subsequent coating process to be smoother.

[0003] In the prior art, the polishing treatment of the surface of NdFeB rare earth permanent magnets requires the use of corresponding polishing equipment and clamping equipment. However, since the entire surface area of ​​the NdFeB rare earth permanent magnet needs to be polished, the clamping position makes it impossible to contact the polishing plate. In particular, for columnar or disc-shaped NdFeB rare earth permanent magnet materials, both sides and sides need to be polished, which results in the need for multiple disassembly and assembly processes throughout the entire processing process, and clamping to different positions to ensure that the polishing process can be achieved at any position, so the processing efficiency is low. On the other hand, when polishing the circular NdFeB rare earth permanent magnet, it is necessary to locate its center position, otherwise it will cause the arc edge of the side to be unable to fit or get stuck when polishing, and the conventional positioning process is cumbersome and prone to deviations. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a surface treatment device for NdFeB rare earth permanent magnets to solve the problems raised in the above-mentioned background technology. The present invention can provide clamping and polishing treatments on non-corresponding areas on both sides of the disc-shaped NdFeB rare earth permanent magnets, and each polishing can provide polishing processing for both the front and back sides and the sides at the same time. Therefore, the entire processing process only requires a single flip to cover the entire surface, thereby improving the processing efficiency, and can automatically realize the center positioning of the NdFeB rare earth permanent magnet when placed, thereby improving the accuracy and stability of polishing.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical scheme: a surface treatment device for NdFeB rare earth permanent magnets, comprising a surface treatment device body, the surface treatment device body comprising a frame, a driving mechanism, a top polishing mechanism and a bottom polishing mechanism, a driving shaft is inserted in the middle of the driving mechanism, and the driving shaft passes through the surface of the top plate of the frame, and the end of the driving shaft is embedded in the inner side of the bottom plate of the frame through a bearing, a top clamping assembly is inserted under the top plate of the frame, and the top polishing mechanism is sleeved on the surface of the top clamping assembly, The first polishing column and the second polishing column are respectively inserted on both sides of the top-layer polishing mechanism, and the bottom plate surface of the frame is inserted with a bottom-layer clamping assembly. The bottom-layer polishing mechanism is sleeved on the surface of the bottom-layer clamping assembly. The top end of the bottom-layer polishing mechanism rests on the middle position of the bottom surface of the NdFeB rare earth permanent magnet workpiece, and the bottom-layer clamping assembly rests on the edge of the bottom surface of the NdFeB rare earth permanent magnet workpiece. The top-layer clamping assembly is pressed on the middle position of the top surface of the NdFeB rare earth permanent magnet workpiece, and the top-layer polishing mechanism is pressed on the edge of the top surface of the NdFeB rare earth permanent magnet workpiece.

[0006] Furthermore, the top-layer polishing mechanism includes a transmission box and a linkage sleeve, the linkage sleeve is integrally formed on the top of the transmission box, a flat key is welded on the surface of the linkage sleeve, a spring tube is inserted at the top of the linkage sleeve, and a top support plate is welded at the top of the spring tube.

[0007] Furthermore, a transmission cavity is opened inside the transmission box, a first toothed plate and a second toothed plate are inserted inside the transmission box, a transmission gear is embedded inside the transmission cavity, and the first toothed plate is meshed with the bottom of the transmission gear, and the second toothed plate is meshed with the top of the transmission gear.

[0008] Furthermore, a first polishing column is inserted below the end of the first toothed plate, a top polishing plate is welded to one end of the bottom of the transmission box, a second polishing column is inserted at the end of the second toothed plate, the number of the first polishing columns is two, and the top polishing plate passes through the middle of the two first polishing columns, a locking screw is inserted on the surface of the second polishing column, and the locking screw is screwed and fixed to one end of the surface of the transmission box.

[0009] Furthermore, the top clamping assembly includes a pressure rod and an extrusion plate, a hand wheel is welded to the top of the pressure rod, a threaded sleeve is provided on the top plate of the frame, an extrusion plate is welded to the bottom of the pressure rod, and a rubber pad is mounted on the bottom of the extrusion plate.

[0010] Furthermore, a limiting convex ring is integrally formed on the surface of the pressure rod, a ball is embedded on the surface of the support plate, and the support plate is supported against the bottom surface of the limiting convex ring through the ball, the pressure rod passes through the inside of the linkage sleeve, and a notch is provided in the middle of the first toothed plate and the second toothed plate, and the pressure rod passes through the notch in the middle of the first toothed plate and the second toothed plate.

[0011] Furthermore, the bottom polishing mechanism includes a driven shaft and a bottom polishing plate, the bottom of the driven shaft is sleeved with a support bearing, and the bottom of the support bearing is embedded in the bottom plate of the frame, and the bottom clamping assembly includes a support plate and a top ring.

[0012] Furthermore, one end of the support plate is welded to the inner side of the frame, a spring rod is inserted into one end of the surface of the support plate, a column is integrally formed in the middle of the surface of the support plate, an extension plate is welded to the top of the spring rod, a lifting ring is opened in the middle of the extension plate, a support rod is welded to the top of the extension plate, and a support ring is welded to the top of the support rod.

[0013] Furthermore, the driving mechanism includes a motor and a driving shaft, the outer shell of the motor is screwed to the top plate of the frame, the surface of the driving shaft is keyed to a driving gear, and the surfaces of the linkage sleeve and the driven shaft are keyed to a driven gear.

[0014] Furthermore, a toothed belt is sleeved on the surface of the driving gear, and each driving gear is connected to the corresponding driven gear through the toothed belt, and the specifications of each driving gear and driven gear are the same.

[0015] Beneficial effects of the present invention:

[0016] 1. The surface treatment device of the NdFeB rare earth permanent magnet can provide clamping and polishing treatment on the non-corresponding areas on both sides of the disc-shaped NdFeB rare earth permanent magnet, and each polishing can provide polishing processing on both the front and back sides and the sides at the same time. Therefore, the entire processing process only requires a single flip to cover the entire surface of the polishing area, thereby improving the processing efficiency.

[0017] 2. The surface treatment device of the NdFeB rare earth permanent magnet can automatically guide the NdFeB rare earth permanent magnet with the help of two first polishing columns when placing a disc-shaped workpiece, so that its center point can be moved along the middle point of the two first polishing columns, and then the subsequent positioning process is further realized with the help of the second polishing column during the movement process, thereby completing the purpose of automatic positioning of the center point and improving the accuracy and stability of polishing.

[0018] 3. The surface treatment device of the NdFeB rare earth permanent magnet can always apply an extrusion force to the middle position of the top of the NdFeB rare earth permanent magnet during the polishing process, and will not interfere with the polishing process at the top edge. The bottom edge of the NdFeB rare earth permanent magnet also provides a pressing force, which will not interfere with the polishing process at the middle position of the bottom. The grinding area and the clamping area will not interfere with each other during the entire polishing process. At the same time, the pressure generated by polishing can be increased with the help of two sets of spring structures to ensure that the polishing has a higher efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the appearance of a surface treatment device for NdFeB rare earth permanent magnets of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the top layer clamping assembly part of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the top layer polishing mechanism part of the present invention;

[0022] Figure 4 is an internal cross-sectional view of the top layer polishing mechanism of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the bottom layer polishing mechanism and bottom layer clamping assembly of the present invention;

[0024] Figure 6 is a cross-sectional view of a bottom clamping assembly portion of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the driving mechanism part of the present invention;

[0026] In the figure: 1, frame; 2, driving mechanism; 3, top clamping assembly; 4, top polishing mechanism; 5, bottom polishing mechanism; 6, bottom clamping assembly; 7, pressure rod; 8, extrusion plate; 9, threaded sleeve; 10, limiting convex ring; 11, hand wheel; 12, transmission box; 13, linkage sleeve; 14, flat key; 15, spring tube; 16, top support plate; 17, first toothed plate; 18, first polishing column; 19, top polishing plate; 20 , second toothed plate; 21, second polishing column; 22, locking screw; 23, transmission cavity; 24, transmission gear; 25, driven shaft; 26, support bearing; 27, bottom polishing plate; 28, support plate; 29, column; 30, spring rod; 31, extension plate; 32, support rod; 33, lifting ring; 34, support ring; 35, motor; 36, drive shaft; 37, driving gear; 38, toothed belt; 39, driven gear. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] See also Figures 1 to 7 The present invention provides the following technical solutions: a surface treatment device for NdFeB rare earth permanent magnets, comprising a surface treatment device body, the surface treatment device body comprising a frame 1, a driving mechanism 2, a top polishing mechanism 4 and a bottom polishing mechanism 5, a driving shaft 36 is inserted in the middle of the driving mechanism 2, and the driving shaft 36 passes through the top plate surface of the frame 1, and the end of the driving shaft 36 is embedded in the inner side of the bottom plate of the frame 1 through a bearing, a top clamping assembly 3 is inserted under the top plate of the frame 1, the top polishing mechanism 4 is sleeved on the surface of the top clamping assembly 3, and the top polishing mechanism 4 is sleeved on the surface of the top clamping assembly 3. The first polishing column 18 and the second polishing column 21 are respectively inserted on both sides of the optical mechanism 4, the bottom plate surface of the frame 1 is inserted with the bottom clamping assembly 6, the bottom polishing mechanism 5 is sleeved on the surface of the bottom clamping assembly 6, the top of the bottom polishing mechanism 5 is against the middle position of the bottom surface of the NdFeB rare earth permanent magnet workpiece, the bottom clamping assembly 6 is against the bottom edge of the NdFeB rare earth permanent magnet workpiece, the top clamping assembly 3 is pressed against the middle position of the top surface of the NdFeB rare earth permanent magnet workpiece, and the top polishing mechanism 4 is pressed against the top edge of the NdFeB rare earth permanent magnet workpiece. The surface treatment device of the NdFeB rare earth permanent magnet is used to polish the entire surface area of ​​the disc-shaped NdFeB rare earth permanent magnet workpiece.

[0029] When the present invention is used, a NdFeB rare earth permanent magnet workpiece is manually pushed from the side of the frame 1 toward the middle position of the top clamping assembly 3 and the bottom clamping assembly 6 until it is placed above the bottom clamping assembly 6. During this process, the second polishing column 21 is manually pulled up to avoid blocking the workpiece, and then the side of the NdFeB rare earth permanent magnet workpiece is pressed against the side of the two first polishing columns 18. The two columnar first polishing columns 18 are used to preliminarily position the NdFeB rare earth permanent magnet workpiece that is transferred and pushed in, so that the center point of the NdFeB rare earth permanent magnet workpiece is kept vertical to the two first polishing columns 18 and the central axis during the subsequent grinding process, and then the workpiece is pushed continuously, and finally the workpiece is transferred to the second polishing column at the rear. The polishing column 21 appears at the edge behind the workpiece. At this time, the second polishing column 21 will lose the support of the magnetic workpiece and eventually fall to the bottom. At this time, the two first polishing columns 18 and the second polishing column 21 can simultaneously lean against different positions on the side of the NdFeB rare earth permanent magnet workpiece to complete the positioning process. Subsequently, the driving mechanism 2 is started, and the top polishing mechanism 4 and the bottom polishing mechanism 5 are driven to rotate by the driving mechanism 2 at the same time, so that the surface edge, the middle of the bottom surface and the side of the entire NdFeB rare earth permanent magnet workpiece can be polished. After completing a single polishing, the workpiece is taken out and turned over, and then placed again, the last polishing clamping area can be re-polished to achieve polishing of all positions on the surface.

[0030] In this embodiment, the top polishing mechanism 4 includes a transmission box 12 and a linkage sleeve 13. The linkage sleeve 13 is integrally formed on the top of the transmission box 12. A flat key 14 is welded on the surface of the linkage sleeve 13. A spring tube 15 is inserted on the top of the linkage sleeve 13. A support plate 16 is welded on the top of the spring tube 15. A transmission cavity 23 is provided inside the transmission box 12. A first toothed plate 17 and a second toothed plate 20 are inserted inside the transmission box 12. A transmission gear 24 is embedded inside the transmission cavity 23. The first toothed plate 17 is meshed with the bottom of the transmission gear 24, and the second toothed plate 20 is meshed with the top of the transmission gear 24. A first polishing column 18 is inserted below the end of the first toothed plate 17, a top polishing plate 19 is welded to one end of the bottom of the transmission box 12, a second polishing column 21 is inserted at the end of the second toothed plate 20, the number of the first polishing columns 18 is two, and the top polishing plate 19 passes through the middle of the two first polishing columns 18, and a locking screw 22 is inserted through the surface of the second polishing column 21, and the locking screw 22 is screwed and fixed to one end of the surface of the transmission box 12. When placing a disc-shaped workpiece, the two first polishing columns 18 against each other can automatically guide the NdFeB rare earth permanent magnet, so that its center point can be moved along the middle point of the two first polishing columns 18, and then the second polishing column 21 can be used to further realize the subsequent positioning process during the movement process, thereby completing the purpose of automatically positioning the center point and improving the accuracy and stability of polishing.

[0031] Specifically, when the plate NdFeB rare earth permanent magnet workpiece is pushed to the middle of the two clamping assemblies, after the front end of the NdFeB rare earth permanent magnet workpiece is against the sides of the two first polishing columns 18, the first toothed plate 17 can be pushed, and the first toothed plate 17 cooperates with the transmission gear 24 to drive the second toothed plate 20 to move in the opposite direction. At this time, as the NdFeB rare earth permanent magnet workpiece is pushed, the second polishing column 21 at the rear moves toward the rear along the top surface of the workpiece, and finally the second polishing column 21 can be moved to the edge of the workpiece and fall off. After falling, a fixed circular position is determined by the contact points of the three polishing columns, so that the positioning process of the NdFeB rare earth permanent magnet workpiece can be realized. After positioning is completed, the locking screw 22 is used to fix the second polishing column 21, and the first polishing column 18 at the front end can also be locked at the same time to ensure that the polishing column will not move out and unfold due to the centrifugal effect during the subsequent polishing process.

[0032] In this embodiment, the top clamping assembly 3 includes a pressure rod 7 and a squeeze plate 8. A hand wheel 11 is welded to the top of the pressure rod 7. A threaded sleeve 9 is provided on the top plate of the frame 1. A squeeze plate 8 is welded to the bottom of the pressure rod 7. A rubber pad is attached to the bottom of the squeeze plate 8. A limiting convex ring 10 is integrally formed on the surface of the pressure rod 7. A ball is embedded on the surface of the support plate 16, and the support plate 16 is supported on the bottom surface of the limiting convex ring 10 through the ball. The pressure rod 7 passes through the inside of the linkage sleeve 13. A notch is provided in the middle of the first toothed plate 17 and the second toothed plate 20. The pressure rod 7 passes through the notch in the middle of the first toothed plate 17 and the second toothed plate 20. During the polishing process, the squeezing force can always be applied to the middle position of the top of the NdFeB rare earth permanent magnet without interfering with the polishing process at the top edge. The bottom edge of the NdFeB rare earth permanent magnet also provides a pressing force, which also does not interfere with the polishing process at the middle position of the bottom. The grinding area and the clamping area will not interfere with each other during the entire polishing process. At the same time, the pressure generated by polishing can be increased with the help of two sets of spring structures to ensure that the polishing has a higher efficiency.

[0033] Specifically, by rotating the hand wheel 11 on the top, the pressure rod 7 is driven to move downward, and the pressure rod 7 drives the extrusion plate 8 at the bottom to move downward, so that it can be pressed to the middle position of the top of the NdFeB rare earth permanent magnet workpiece, and the limiting convex ring 10 blocks the top support plate 16 through the ball bearing. Therefore, when the subsequent top polishing mechanism performs rotational polishing, the middle top clamping assembly 3 will always remain fixed, and at the same time, with the help of the spring structure on the spring sleeve, reverse pressure is applied to the top polishing mechanism 4 downward to ensure that it can achieve polishing of the top surface and side edges of the NdFeB rare earth permanent magnet workpiece.

[0034] In this embodiment, the bottom polishing mechanism 5 includes a driven shaft 25 and a bottom polishing plate 27. The bottom of the driven shaft 25 is sleeved with a support bearing 26, and the bottom of the support bearing 26 is embedded in the bottom plate of the frame 1. The bottom clamping assembly 6 includes a support plate 28 and a top ring 34. One end of the support plate 28 is welded to the inner side of the frame 1, and a spring rod 30 is inserted at one end of the surface of the support plate 28. A column 29 is integrally formed in the middle of the surface of the support plate 28. An extension plate 31 is welded to the top of the spring rod 30, and a lifting ring 33 is provided in the middle of the extension plate 31. A support rod 32 is welded to the top of the extension plate 31, and a top ring 34 is welded to the top of the support rod 32. It can provide clamping and polishing treatment on the non-corresponding areas on both sides of the disc-shaped NdFeB rare earth permanent magnet, and each polishing can provide polishing processing for both the front and back sides and the side at the same time. Therefore, the entire processing process only requires a single flip to cover the entire surface of the polishing area, thereby improving the processing efficiency. The driving mechanism 2 includes a motor 35 and a driving shaft 36. The housing of the motor 35 is screwed on the top plate of the frame 1. The surface of the driving shaft 36 is keyed with a driving gear 37. The surfaces of the linkage sleeve 13 and the driven shaft 25 are keyed with a driven gear 39. The surface of the driving gear 37 is sleeved with a toothed belt 38, and each driving gear 37 is connected to the corresponding driven gear 39 through the toothed belt 38, and the specifications of each driving gear 37 and driven gear 39 are the same.

[0035] Specifically, after starting the motor 35, the driving shaft 36 drives the two driving gears 37 to rotate at the same time, and the top driving gear 37 drives the top driven gear 39 to rotate through the toothed belt 38, and the driven gear 39 drives the linkage sleeve 13 to rotate with the help of the flat key 14, thereby controlling the entire top polishing mechanism 4 to rotate, so that the top polishing cloth and three polishing columns below the top polishing mechanism 4 rotate, so as to achieve the polishing of the top edge and side of the NdFeB rare earth permanent magnet workpiece, and the driving gear 37 below the driving shaft 36 drives the driven gear 39 below to rotate through the toothed belt 38, thereby controlling the rotation of the driven shaft 25, so that the bottom polishing plate 27 at the top of the driven shaft 25 rotates, and the middle position of the bottom surface of the NdFeB rare earth permanent magnet workpiece is polished. At the same time, the bottom clamping assembly 6 also pushes the abutment ring 34 upward with the help of the spring rod 30, so as to achieve the abutment effect on the bottom edge of the NdFeB rare earth permanent magnet workpiece, and cooperates with the extrusion plate 8 above to ensure the clamping of the workpiece.

[0036] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A surface treatment device for NdFeB rare earth permanent magnets, comprising a surface treatment device body, characterized in that: The surface treatment device body comprises a frame (1), a driving mechanism (2), a top polishing mechanism (4) and a bottom polishing mechanism (5); a driving shaft (36) is inserted in the middle of the driving mechanism (2), and the driving shaft (36) passes through the surface of the top plate of the frame (1); the end of the driving shaft (36) is embedded in the inner side of the bottom plate of the frame (1) through a bearing; a top clamping assembly (3) is inserted below the top plate of the frame (1); the top polishing mechanism (4) is sleeved on the surface of the top clamping assembly (3); and first polishing assemblies (4) are respectively inserted on both sides of the top polishing mechanism (4). The light column (18) and the second polishing column (21) are provided, the bottom plate surface of the frame (1) is inserted with a bottom clamping assembly (6), the bottom polishing mechanism (5) is sleeved on the surface of the bottom clamping assembly (6), the top end of the bottom polishing mechanism (5) is pressed against the middle position of the bottom surface of the NdFeB rare earth permanent magnet workpiece, the bottom clamping assembly (6) is pressed against the edge of the bottom surface of the NdFeB rare earth permanent magnet workpiece, the top clamping assembly (3) is pressed against the middle position of the top surface of the NdFeB rare earth permanent magnet workpiece, and the top polishing mechanism (4) is pressed against the edge of the top surface of the NdFeB rare earth permanent magnet workpiece.

2. The surface treatment device of a NdFeB rare earth permanent magnet according to claim 1, characterized in that: The top polishing mechanism (4) comprises a transmission box (12) and a linkage sleeve (13); the linkage sleeve (13) is integrally formed on the top of the transmission box (12); a flat key (14) is welded on the surface of the linkage sleeve (13); a spring tube (15) is inserted at the top of the linkage sleeve (13); and a support plate (16) is welded at the top end of the spring tube (15).

3. The surface treatment device of a NdFeB rare earth permanent magnet according to claim 2, characterized in that: A transmission cavity (23) is provided inside the transmission box (12), a first toothed plate (17) and a second toothed plate (20) are inserted into the transmission box (12), a transmission gear (24) is embedded in the transmission cavity (23), the first toothed plate (17) and the transmission gear (24) are meshed at their bottoms, and the second toothed plate (20) and the transmission gear (24) are meshed at their tops.

4. The surface treatment device of a NdFeB rare earth permanent magnet according to claim 3, characterized in that: A first polishing column (18) is inserted below the end of the first toothed plate (17), a top polishing plate (19) is welded to one end of the bottom of the transmission box (12), a second polishing column (21) is inserted at the end of the second toothed plate (20), the number of the first polishing columns (18) is two, and the top polishing plate (19) passes through the middle of the two first polishing columns (18), a locking screw (22) is inserted on the surface of the second polishing column (21), and the locking screw (22) is screwed and fixed to one end of the surface of the transmission box (12).

5. The surface treatment device of a NdFeB rare earth permanent magnet according to claim 3, characterized in that: The top clamping assembly (3) comprises a pressure rod (7) and an extrusion plate (8), a hand wheel (11) is welded to the top of the pressure rod (7), a threaded sleeve (9) is provided on the top plate of the frame (1), an extrusion plate (8) is welded to the bottom of the pressure rod (7), and a rubber pad is attached to the bottom of the extrusion plate (8).

6. The surface treatment device of a NdFeB rare earth permanent magnet according to claim 5, characterized in that: The surface of the pressure rod (7) is integrally formed with a limiting convex ring (10), the surface of the support plate (16) is embedded with a ball, and the support plate (16) is supported on the bottom surface of the limiting convex ring (10) through the ball, the pressure rod (7) passes through the inside of the linkage sleeve (13), and the first toothed plate (17) and the second toothed plate (20) are both provided with a notch in the middle, and the pressure rod (7) passes through the notch in the middle of the first toothed plate (17) and the second toothed plate (20).

7. The surface treatment device for NdFeB rare earth permanent magnet according to claim 2, characterized in that: The bottom polishing mechanism (5) comprises a driven shaft (25) and a bottom polishing plate (27); the bottom of the driven shaft (25) is sleeved with a support bearing (26), and the bottom of the support bearing (26) is embedded in the bottom plate of the frame (1); the bottom clamping assembly (6) comprises a support plate (28) and a support ring (34).

8. The surface treatment device for NdFeB rare earth permanent magnet according to claim 7, characterized in that: One end of the support plate (28) is welded to the inner side of the frame (1); a spring rod (30) is inserted into one end of the surface of the support plate (28); a column (29) is integrally formed in the middle of the surface of the support plate (28); an extension plate (31) is welded to the top of the spring rod (30); a lifting ring (33) is provided in the middle of the extension plate (31); a support rod (32) is welded to the top of the extension plate (31); and a support ring (34) is welded to the top of the support rod (32).

9. The surface treatment device for NdFeB rare earth permanent magnet according to claim 7, characterized in that: The driving mechanism (2) comprises a motor (35) and a driving shaft (36), the outer shell of the motor (35) being screwed onto the top plate of the frame (1), the surface of the driving shaft (36) being key-connected with a driving gear (37), and the surfaces of the linkage sleeve (13) and the driven shaft (25) being key-connected with a driven gear (39).

10. The surface treatment device of NdFeB rare earth permanent magnet according to claim 9, characterized in that: A toothed belt (38) is sleeved on the surface of the driving gear (37), and each driving gear (37) is connected to a corresponding driven gear (39) via the toothed belt (38), and the specifications of each driving gear (37) and driven gear (39) are the same.

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