Preparation device of high-performance high-corrosion-resistance sintered neodymium-iron-boron permanent magnet material

Abstract

This invention relates to the field of permanent magnet material preparation technology, specifically to a preparation device for high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials. The device includes: a preparation box; a first conveying pipe at the top of the preparation box; a storage tank connected to the top of the first conveying pipe; a furnace on one side of the preparation box; a discharge hopper fixedly connected to one end of the first conveying pipe near the furnace; and the other end of the discharge hopper connected to the top wall of the furnace. This invention enables the agglomerated NdFeB permanent magnet material to automatically detach from the forming plate, facilitating the transfer of the NdFeB permanent magnet material and reducing the time spent by users transferring the material. It also allows for sufficient contact between coarse powder and air, improving the preparation efficiency of fine powder. Furthermore, this preparation device can complete the processes of melting, forming, conveying, and pulverizing NdFeB permanent magnet materials, reducing the user's workload and improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet material preparation technology, specifically to a device for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials. Background Technology

[0002] Neodymium iron boron (NdFeB) magnets, as the third generation of rare-earth permanent magnet materials, are known as the "King of Magnets." Due to their excellent magnetic properties, abundant raw material sources, and low cost, they have been widely used in various fields since their introduction in 1983, especially in high-tech fields such as computers and communications electronics, becoming a fundamental material in these fields. However, NdFeB materials are highly chemically reactive and easily oxidized and corroded in normal environments. Furthermore, because of selective corrosion, this can lead to severe deterioration of the magnet's magnetic properties or even pulverization and loss of function. Therefore, improving the corrosion resistance of NdFeB permanent magnets is crucial for their application. The corrosion of NdFeB magnets is a "phase-selective corrosion" process, where the highly electrochemically active NdFeB-rich intergranular phase is preferentially corroded, leaving obvious corrosion "points" and "pits" on the surface of the main phase grains. Simultaneously, with the corrosion of the main phase, the edges of the main phase grains disappear, and the grain surface becomes smoother. In terms of corrosion morphology, it exhibits the characteristics of intergranular corrosion, namely, the dissolution of the neodymium-rich intergranular phase uniformly coated on the main phase grains, the disappearance of the bonding interface between the main phase grains, and the occurrence of grain detachment.

[0003] The process of preparing neodymium iron boron permanent magnet materials involves several steps. First, raw materials are prepared and then melted into castings or ingots. Next, the castings or ingots are crushed in a hydrogen environment and then ground into fine powder using a high-pressure gas flow. Finally, the fine powder is placed into a mold to support the required shape. During the preparation process, users need to use multiple devices to process the neodymium iron boron permanent magnet materials and continuously transfer them, which consumes a lot of time and affects work efficiency.

[0004] To address this, a device for preparing high-performance, highly corrosion-resistant sintered NdFeB permanent magnet materials is proposed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a device for preparing high-performance, highly corrosion-resistant sintered NdFeB permanent magnet materials.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An apparatus for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials includes: a preparation box; a first conveying pipe at the top of the preparation box; a storage tank connected to the top of the first conveying pipe; a furnace located on one side of the preparation box; a discharge hopper fixedly connected to one end of the first conveying pipe near the furnace; the other end of the discharge hopper connected to the top wall of the furnace; and a discharge pipe connected to the bottom of the furnace.

[0008] Also includes:

[0009] A transfer assembly is disposed within a preparation chamber. The transfer assembly includes a horizontal conveyor belt and a vertical conveyor belt disposed within the preparation chamber. Multiple horizontal drive rollers are uniformly rotatably mounted on the inner side of the horizontal conveyor belt, and multiple vertical drive rollers are uniformly rotatably mounted on the inner side of the vertical conveyor belt. Both the vertical and horizontal drive rollers are rotatably mounted on the side wall of the preparation chamber. Multiple molding components for easy demolding are uniformly disposed on the outer wall of the horizontal conveyor belt.

[0010] Preferably, the molding assembly consists of multiple molding plates, and the bottom ends of the multiple molding plates are fixedly connected to the bottom wall of the horizontal conveyor belt. The bottom ends of two adjacent molding plates are provided with a common mounting groove. A connecting block is rotatably installed in the mounting groove. Both ends of the connecting block are fixedly connected with limit pins, and the limit pins extend into the side wall of the mounting groove.

[0011] When molten NdFeB permanent magnet material falls from the discharge pipe onto the forming plate, it clumps together. A horizontal conveyor belt then transports the NdFeB permanent magnet material. When the material reaches the edge of the conveyor belt, the forming plate at that edge flips via a connecting block, allowing the clumped NdFeB permanent magnet material to automatically detach from the forming plate. This facilitates the transfer of the NdFeB permanent magnet material, which then falls onto a support plate and is further conveyed into a crushing bin via a vertical conveyor belt. The process is simple, reduces the time spent by operators transferring the NdFeB permanent magnet material, and improves work efficiency.

[0012] Preferably, a condenser is provided at the bottom of the preparation box, the condenser is located directly above the horizontal conveyor belt, and heat dissipation holes adapted to the condenser are provided on the side wall of the preparation box.

[0013] Preferably, multiple bearing plates are uniformly fixedly installed on the outer wall of the vertical conveyor belt, and a fourth motor is also provided in the preparation box. A second sprocket is fixedly installed at the output end of the fourth motor, and the second sprocket is fixedly connected to the central shaft of the outermost horizontal transmission roller. A first sprocket is fixedly installed on the central shaft of the bottommost vertical transmission roller, and a transmission belt is sleeved on the outer wall of the first sprocket and the second sprocket.

[0014] The condenser can accelerate the solidification of NdFeB permanent magnet materials in the molten state, ensuring preparation efficiency. Furthermore, the fourth motor, in conjunction with the first and second sprockets, enables the vertical and horizontal conveyor belts to operate simultaneously, avoiding the need for multiple motors to drive the vertical and horizontal conveyor belts separately, thus reducing operating costs and improving economic efficiency.

[0015] Preferably, a heater is provided at the bottom of the furnace, and a rotary valve is rotatably installed at the top of the furnace. The bottom of the rotary valve extends to the top of the discharge pipe and is fixedly connected with a sealing plug.

[0016] Preferably, a first motor is fixedly connected to the side wall of the first conveying pipe, and the output end of the first motor extends into the first conveying pipe and is fixedly connected to a first spiral blade roller.

[0017] The first motor can drive the first spiral blade roller to rotate inside the first conveying pipe, which can automatically feed the raw materials of NdFeB permanent magnet materials, reducing the burden on the workers. The heater can heat and melt the raw materials of NdFeB permanent magnet materials, and the rotary valve and sealing plug can facilitate the user to discharge the molten NdFeB permanent magnet materials.

[0018] Preferably, the preparation box also includes a crushing barrel, a slide rail is fixedly installed on the outer wall of the crushing barrel, a support frame adapted to the slide rail is fixedly installed on the inner wall of the preparation box, multiple grooves are evenly rotatably installed on the top of the crushing barrel, a sealing cover is rotatably installed on the side wall of the groove, a conveying plate is also provided on the side wall of the preparation box, the conveying plate is located between the vertical conveyor belt and the crushing barrel, an air compressor is provided at the bottom of the crushing barrel, a disc is fixedly installed at the center of the bottom of the crushing barrel, nozzles connected to the air compressor are provided on the top and outer walls of the disc, and a drive assembly for controlling the rotation of the crushing barrel is also provided at the bottom of the preparation box.

[0019] Preferably, the drive assembly includes a third motor fixedly installed on the bottom wall of the preparation chamber, the output end of the third motor is fixedly connected to a gear, and an annular rack and pinion ring adapted to the gear is fixedly installed on the bottom wall of the crushing barrel.

[0020] After the formed NdFeB permanent magnet material enters the crushing barrel through the conveyor plate, hydrogen gas is introduced into the crushing barrel through the nozzle. At this time, the agglomerated NdFeB permanent magnet material can react with hydrogen gas to expand and form coarse powder. Then, the air compressor is started, which can drive high-pressure gas to blow up the coarse powder, causing the coarse powder to collide with each other to form fine powder. When the operator starts the third motor, the third motor can drive the gear to rotate. At this time, the gear can drive the crushing barrel to rotate in the preparation box through the ring rack, which can make the coarse powder fully contact with the air and improve the preparation efficiency of fine powder.

[0021] Preferably, the bottom of the crushing barrel is provided with a discharge port, a sealing plate is rotatably installed on the side wall at the top of the discharge port, an electric telescopic rod is rotatably installed at the bottom of the sealing plate, the bottom of the electric telescopic rod is rotatably installed on the side wall of the discharge port, a second conveying pipe is provided at the bottom of the discharge port, a second spiral blade roller is rotatably installed inside the second conveying pipe, a discharge hole is provided on the bottom wall of the second conveying pipe extending outside the preparation box, and a second motor is fixedly installed on the outer wall of the second conveying pipe and fixedly connected to the second spiral blade roller.

[0022] Preferably, a fifth motor is fixedly installed at the center of the top of the crushing barrel, and the output end of the fifth motor extends into the crushing barrel to be fixedly installed with a limiting scraper. The outer wall of the limiting scraper is in close contact with the bottom wall of the crushing barrel. The top of the crushing barrel is provided with multiple air vents, and a filter screen is provided on the inner wall of the air vents.

[0023] The second motor drives the second spiral blade roller to rotate inside the second conveying pipe. When the user starts the electric telescopic rod, the electric telescopic rod can retract, and at this time the sealing plate can flip, so that the fine powder NdFeB permanent magnet material can enter the second conveying pipe from the discharge port, be conveyed by the second spiral blade roller and collected from the discharge hole. When the fifth motor is powered on, the fifth motor can drive the limiting scraper to rotate inside the crushing barrel, which can prevent fine powder from remaining in the crushing barrel, avoid fine powder waste, and reduce cleaning difficulty.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. By setting up a forming component, when the molten NdFeB permanent magnet material falls from the discharge pipe onto the forming plate, it can clump together. At this time, the horizontal conveyor belt can transport the NdFeB permanent magnet material. When the NdFeB permanent magnet material moves to the edge of the horizontal conveyor belt, the forming plate at the edge can be flipped by the connecting block, and the clumped NdFeB permanent magnet material can automatically fall off the forming plate, facilitating the transfer of the NdFeB permanent magnet material. The clumped NdFeB permanent magnet material can then fall onto the bearing plate and further enter the crushing barrel via the vertical conveyor belt. The operation is simple, which can reduce the time spent by the user in transferring the NdFeB permanent magnet material and improve work efficiency.

[0026] 2. By setting up a drive assembly, after the formed NdFeB permanent magnet material enters the crushing barrel through the conveyor plate, hydrogen gas is introduced into the crushing barrel through the nozzle. At this time, the agglomerated NdFeB permanent magnet material can react with hydrogen gas to expand and form coarse powder. Then, the air compressor is started, which can drive high-pressure gas to blow up the coarse powder, causing the coarse powder to collide with each other to form fine powder. When the user starts the third motor, the third motor can drive the gear to rotate. At this time, the gear can drive the crushing barrel to rotate in the preparation box through the ring rack, which can make the coarse powder fully contact with the air and improve the preparation efficiency of fine powder.

[0027] 3. The second motor drives the second spiral blade roller to rotate inside the second conveying pipe. When the user starts the electric telescopic rod, the electric telescopic rod can retract, and at this time the sealing plate can flip, so that the fine powder NdFeB permanent magnet material can enter the second conveying pipe from the discharge port, be conveyed by the second spiral blade roller and collected from the discharge hole. When the fifth motor is powered on, the fifth motor can drive the limiting scraper to rotate inside the crushing barrel, which can prevent fine powder from remaining in the crushing barrel, avoid fine powder waste, reduce cleaning difficulty, and complete the processes of melting, forming, conveying and crushing NdFeB permanent magnet material through this preparation device, which can reduce the operation process of the user and improve work efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a preparation device for a high-performance, high-corrosion-resistant sintered NdFeB permanent magnet material according to an embodiment of the present invention.

[0029] Figure 2 This is a side view of a device for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials according to an embodiment of the present invention.

[0030] Figure 3 This is a side view of an apparatus for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials according to an embodiment of the present invention.

[0031] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0032] Figure 5 This is a front view of an apparatus for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials according to an embodiment of the present invention.

[0033] Figure 6 For the present invention Figure 5 Schematic diagram of the cross-sectional structure of BB;

[0034] Figure 7 This is a schematic diagram of the structure of the horizontal conveyor belt and the vertical conveyor belt in an embodiment of the present invention;

[0035] Figure 8 This is a partial structural unfolded diagram of the molding plate in an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the structure of the bottom end of the crushing barrel in an embodiment of the present invention;

[0037] Figure 10 This is a schematic cross-sectional view of the crushing barrel in an embodiment of the present invention;

[0038] Figure 11 For the present invention Figure 6 A magnified view of C.

[0039] In the diagram: 1. Preparation box; 2. Heat dissipation hole; 3. Rotary valve; 4. Furnace; 5. Discharge hopper; 6. First conveying pipe; 7. Storage box; 8. First motor; 9. Second motor; 10. Second conveying pipe; 11. First spiral blade roller; 12. Sealing plug; 13. Heater; 14. Discharge pipe; 15. Horizontal conveyor belt; 16. Condenser; 17. Vertical conveyor belt; 18. Air compressor; 19. Third motor; 20. Conveying plate; 21. Crushing barrel; 22. Support frame; 23. Second spiral blade roller; 24. Discharge hole; 25. 26. Vertical drive roller; 27. Bearing plate; 28. Drive belt; 29. ​​First sprocket; 20. Second sprocket; 31. Fourth motor; 32. Horizontal drive roller; 33. Forming plate; 34. Mounting groove; 35. Limiting pin; 36. Connecting block; 37. Air outlet; 38. Slide rail; 39. Ring rack; 40. Discharge port; 41. Gear; 42. Sealing cover; 43. Fifth motor; 44. Filter screen; 45. Groove; 46. Limiting scraper; 47. Disc; 48. Nozzle; 49. Electric telescopic rod; 50. Sealing plate. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0042] Example: Please refer to Figures 1 to 11A device for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials includes: a preparation box 1, a first conveying pipe 6 at the top of the preparation box 1, a storage box 7 connected to the top of the first conveying pipe 6, a furnace 4 on one side inside the preparation box 1, a discharge hopper 5 fixedly connected to one end of the first conveying pipe 6 near the furnace 4, the other end of the discharge hopper 5 connected to the top wall of the furnace 4, and a discharge pipe 14 connected to the bottom of the furnace 4.

[0043] Also includes:

[0044] The transfer assembly is set inside the preparation box 1. The transfer assembly includes a horizontal conveyor belt 15 and a vertical conveyor belt 17 set inside the preparation box 1. Multiple horizontal drive rollers 31 are uniformly rotatably installed on the inner side of the horizontal conveyor belt 15. Multiple vertical drive rollers 25 are uniformly rotatably installed on the inner side of the vertical conveyor belt 17. Both the vertical drive rollers 25 and the horizontal drive rollers 31 are rotatably installed on the side wall of the preparation box 1. Multiple molding components that facilitate demolding are uniformly arranged on the outer wall of the horizontal conveyor belt 15.

[0045] As one embodiment of the present invention, refer to Figures 7-8 The molding component consists of multiple molding plates 32, and the bottom ends of the multiple molding plates 32 are fixedly connected to the bottom wall of the horizontal conveyor belt 15. The bottom ends of two adjacent molding plates 32 are provided with a mounting groove 33. A connecting block 35 is rotatably installed in the mounting groove 33. Both ends of the connecting block 35 are fixedly connected with limit pins 34, and the limit pins 34 extend into the side wall of the mounting groove 33.

[0046] When the molten NdFeB permanent magnet material falls from the discharge pipe 14 onto the forming plate 32, it can clump together. At this time, the horizontal conveyor belt 15 can transport the NdFeB permanent magnet material. When the NdFeB permanent magnet material moves to the edge of the horizontal conveyor belt 15, the forming plate 32 at the edge can be flipped by the connecting block 35. The clumped NdFeB permanent magnet material can automatically fall off the forming plate 32, which facilitates the transfer of the NdFeB permanent magnet material. The clumped NdFeB permanent magnet material can then fall onto the bearing plate 26 and enter the crushing barrel 21 through the vertical conveyor belt 17. The operation is simple, which can reduce the time spent by the user in transferring the NdFeB permanent magnet material and improve work efficiency.

[0047] As one embodiment of the present invention, refer to Figure 4 A condenser 16 is provided at the bottom of the preparation box 1. The condenser 16 is located directly above the horizontal conveyor belt 15. Heat dissipation holes 2 adapted to the condenser 16 are provided on the side wall of the preparation box 1.

[0048] Multiple bearing plates 26 are evenly fixedly installed on the outer wall of the vertical conveyor belt 17. A fourth motor 30 is also provided in the preparation box 1. A second sprocket 29 is fixedly installed at the output end of the fourth motor 30. The second sprocket 29 is fixedly connected to the central shaft of the outermost horizontal transmission roller 31. A first sprocket 28 is fixedly installed on the central shaft of the bottom vertical transmission roller 25. A transmission belt 27 is sleeved on the outer walls of the first sprocket 28 and the second sprocket 29.

[0049] The condenser 16 can accelerate the solidification of neodymium iron boron permanent magnet material in the molten state, which can ensure the preparation efficiency. Furthermore, the fourth motor 30, together with the first sprocket 28 and the second sprocket 29, can make the vertical conveyor belt 17 and the horizontal conveyor belt 15 operate simultaneously, which can avoid driving the vertical conveyor belt 17 and the horizontal conveyor belt 15 separately by multiple motors, thereby reducing the cost of use and improving economic efficiency.

[0050] As one embodiment of the present invention, refer to Figure 4 A heater 13 is provided at the bottom of the furnace 4, and a rotary valve 3 is rotatably installed at the top of the furnace 4. The bottom of the rotary valve 3 extends to the top of the discharge pipe 14 and is fixedly connected to a sealing plug 12.

[0051] A first motor 8 is fixedly connected to the side wall of the first conveying pipe 6, and the output end of the first motor 8 extends into the first conveying pipe 6 and is fixedly connected to a first spiral blade roller 11.

[0052] The first motor 8 can drive the first spiral blade roller 11 to rotate inside the first conveying pipe 6, which can automatically feed the raw materials of NdFeB permanent magnet materials, reducing the burden on the staff. The heater 13 can heat and melt the raw materials of NdFeB permanent magnet materials, and the rotary valve 3, together with the sealing plug 12, can facilitate the user to discharge the molten NdFeB permanent magnet materials.

[0053] As one embodiment of the present invention, refer to Figure 6 , Figure 9 The preparation box 1 is also equipped with a crushing barrel 21. A slide rail 37 is fixedly installed on the outer wall of the crushing barrel 21. A support frame 22 adapted to the slide rail 37 is fixedly installed on the inner wall of the preparation box 1. Multiple grooves 44 are evenly rotated and installed on the top of the crushing barrel 21. A sealing cover 41 is rotated and installed on the side wall of the groove 44. A conveying plate 20 is also provided on the side wall of the preparation box 1. The conveying plate 20 is located between the vertical conveyor belt 17 and the crushing barrel 21. An air compressor 18 is provided at the bottom of the crushing barrel 21. A disc 46 is fixedly installed at the center of the bottom of the crushing barrel 21. Nozzles 47 connected to the air compressor 18 are provided on the top wall and outer wall of the disc 46. A drive assembly for controlling the rotation of the crushing barrel 21 is also provided at the bottom of the preparation box 1.

[0054] The drive assembly includes a third motor 19 fixedly installed on the bottom wall of the preparation chamber 1. A gear 40 is fixedly connected to the output end of the third motor 19. An annular rack ring 38 adapted to the gear 40 is fixedly installed on the bottom wall of the crushing barrel 21.

[0055] After the formed NdFeB permanent magnet material enters the crushing barrel 21 through the conveying plate 20, hydrogen gas is introduced into the crushing barrel 21 through the nozzle 47. At this time, the agglomerated NdFeB permanent magnet material can react with hydrogen gas to expand and form coarse powder. Then, the air compressor 18 is started, which can drive high-pressure gas to blow up the coarse powder, causing the coarse powder to collide with each other to form fine powder. When the user starts the third motor 19, the third motor 19 can drive the gear 40 to rotate. At this time, the gear 40 can drive the crushing barrel 21 to rotate in the preparation box 1 through the ring rack ring 38, which can make the coarse powder fully contact with the air and improve the preparation efficiency of fine powder.

[0056] As one embodiment of the present invention, refer to Figures 9-11 The bottom of the crushing barrel 21 is provided with a discharge port 39. A sealing plate 50 is rotatably installed on the side wall at the top of the discharge port 39. An electric telescopic rod 49 is rotatably installed at the bottom of the sealing plate 50. The bottom of the electric telescopic rod 49 is rotatably installed on the side wall of the discharge port 39. A second conveying pipe 10 is provided at the bottom of the discharge port 39. A second spiral blade roller 23 is rotatably installed inside the second conveying pipe 10. A discharge hole 24 is provided on the bottom wall of the second conveying pipe 10 extending outside the preparation box 1. A second motor 9 is fixedly installed on the outer wall of the second conveying pipe 10 and fixedly connected to the second spiral blade roller 23.

[0057] A fifth motor 42 is fixedly installed at the center of the top of the crushing barrel 21. The output end of the fifth motor 42 extends into the crushing barrel 21 and a limiting scraper 45 is fixedly installed. The outer wall of the limiting scraper 45 is tightly fitted with the bottom wall of the crushing barrel 21. Multiple air vents 36 are opened at the top of the crushing barrel 21. A filter screen 43 is provided on the inner wall of the air vents 36.

[0058] The second motor 9 can drive the second spiral blade roller 23 to rotate inside the second conveying pipe 10. When the user starts the electric telescopic rod 49, the electric telescopic rod 49 can retract. At this time, the sealing plate 50 can flip, so that the fine powder NdFeB permanent magnet material can enter the second conveying pipe 10 from the discharge port 39, be conveyed by the second spiral blade roller 23 and collected from the discharge hole 24. When the fifth motor 42 is powered on, the fifth motor 42 can drive the limiting scraper 45 to rotate inside the crushing barrel 21, which can prevent fine powder from remaining in the crushing barrel 21, avoid fine powder waste, and reduce cleaning difficulty.

[0059] Working principle: First, the raw material of NdFeB permanent magnet is poured into the storage box 7. The first motor 8 drives the first spiral blade roller 11 to rotate in the first conveying pipe 6, which can automatically feed the raw material of NdFeB permanent magnet, reducing the burden on the workers. The raw material of NdFeB permanent magnet can enter the furnace 4 through the unloading hopper 5. The heater 13 can heat and melt the raw material of NdFeB permanent magnet. The operator can rotate the rotary valve 3 to move the sealing plug 12 upward, which can facilitate the operator to discharge the molten NdFeB permanent magnet. When the molten NdFeB permanent magnet falls from the discharge pipe 14 onto the forming plate 32, the condenser 16 can accelerate the solidification of the molten NdFeB permanent magnet, which can ensure the solidification of the material. The system improves efficiency by allowing NdFeB permanent magnet materials to clump together. The horizontal conveyor belt 15 transports the NdFeB permanent magnet materials. When the materials reach the edge of the horizontal conveyor belt 15, the forming plate 32 at the edge flips via the connecting block 35 in the mounting groove 33, causing the clumped NdFeB permanent magnet materials to automatically detach from the forming plate 32, facilitating transfer. The clumped NdFeB permanent magnet materials then fall onto the bearing plate 26 and are further conveyed into the crushing bin 21 via the vertical conveyor belt 17. This simple operation reduces the time spent transferring NdFeB permanent magnet materials and improves work efficiency. The system also utilizes a fourth motor 30 in conjunction with the first sprocket 28 and the second sprocket 29 for vertical... The drive roller 25 and the horizontal drive roller 31 enable the vertical conveyor belt 17 and the horizontal conveyor belt 15 to operate simultaneously, avoiding the need for multiple motors to drive the vertical conveyor belt 17 and the horizontal conveyor belt 15 separately, thus reducing operating costs and improving economic efficiency. After the formed NdFeB permanent magnet material enters the crushing barrel 21 through the conveyor plate 20, hydrogen gas is introduced into the crushing barrel 21 through the nozzle 47. At this time, the agglomerated NdFeB permanent magnet material can react with hydrogen gas to expand and form coarse powder. Then, the air compressor 18 is started, which can drive high-pressure gas to blow up the coarse powder, causing the coarse powder to collide with each other to form fine powder. When the user starts the third motor 19, the third motor 19 can drive the gear 40 to rotate. At this time, the gear 40 can drive the ring rack ring 38 to rotate. The rotating crushing barrel 21 rotates within the preparation chamber 1. Simultaneously, the crushing barrel 21 can rotate on the support frame 22 via the slide rail 37, ensuring sufficient contact between the coarse powder and air, thus improving the preparation efficiency of the fine powder. The second motor 9 drives the second spiral blade roller 23 to rotate within the second conveying pipe 10. When the user activates the electric telescopic rod 49, it retracts, causing the sealing plate 50 to flip. This allows the finely powdered NdFeB permanent magnet material to enter the second conveying pipe 10 from the discharge port 39, be conveyed by the second spiral blade roller 23, and collected from the discharge hole 24. Furthermore, when the fifth motor 42 is energized, it drives the limiting scraper 45 to rotate within the crushing barrel 21, preventing fine powder residue from remaining in the crushing barrel 21.This avoids wasting fine powder and reduces cleaning difficulty.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An apparatus for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials, comprising: A preparation box (1) is provided with a first conveying pipe (6) at its top end. A storage box (7) is connected to the top end of the first conveying pipe (6). A furnace (4) is provided on one side inside the preparation box (1). A discharge hopper (5) is fixedly connected to one end of the first conveying pipe (6) near the furnace (4). The other end of the discharge hopper (5) is connected to the top wall of the furnace (4). A discharge pipe (14) is connected to the bottom end of the furnace (4). The preparation box (1) is characterized in that... Also includes: A transfer assembly is set inside the preparation box (1). The transfer assembly includes a horizontal conveyor belt (15) and a vertical conveyor belt (17) set inside the preparation box (1). Multiple horizontal drive rollers (31) are uniformly rotatably installed on the inner side of the horizontal conveyor belt (15). Multiple vertical drive rollers (25) are uniformly rotatably installed on the inner side of the vertical conveyor belt (17). Both the vertical drive rollers (25) and the horizontal drive rollers (31) are rotatably installed on the side wall of the preparation box (1). Multiple molding components that facilitate demolding are uniformly arranged on the outer wall of the horizontal conveyor belt (15). The molding assembly consists of multiple molding plates (32), and the bottom ends of the multiple molding plates (32) are fixedly connected to the bottom wall of the horizontal conveyor belt (15). The bottom ends of two adjacent molding plates (32) are provided with a common mounting groove (33). A connecting block (35) is rotatably installed in the mounting groove (33). Both ends of the connecting block (35) are fixedly connected with limit pins (34), and the limit pins (34) extend into the side wall of the mounting groove (33). The preparation box (1) is also equipped with a crushing barrel (21). A slide rail (37) is fixedly installed on the outer wall of the crushing barrel (21). A support frame (22) adapted to the slide rail (37) is fixedly installed on the inner wall of the preparation box (1). Multiple grooves (44) are evenly rotated on the top of the crushing barrel (21). A sealing cover (41) is rotated on the side wall of the groove (44). A conveying plate (20) is also provided on the side wall of the preparation box (1). The conveying plate (20) is located between the vertical conveyor belt (17) and the crushing barrel (21). An air compressor (18) is provided at the bottom of the crushing barrel (21). A disc (46) is fixedly installed at the center of the bottom of the crushing barrel (21). A nozzle (47) connected to the air compressor (18) is provided on the top wall and outer wall of the disc (46). A drive assembly for controlling the rotation of the crushing barrel (21) is also provided at the bottom of the preparation box (1). The bottom end of the crushing barrel (21) is provided with a discharge port (39). A sealing plate (50) is rotatably installed on the side wall at the top of the discharge port (39). An electric telescopic rod (49) is rotatably installed at the bottom end of the sealing plate (50). The bottom end of the electric telescopic rod (49) is rotatably installed on the side wall of the discharge port (39). A second conveying pipe (10) is provided at the bottom end of the discharge port (39). A second spiral blade roller (23) is rotatably installed inside the second conveying pipe (10). A discharge hole (24) is provided on the bottom wall of the second conveying pipe (10) extending outside the preparation box (1). A second motor (9) is fixedly installed on the outer wall of the second conveying pipe (10) and fixedly connected to the second spiral blade roller (23). A fifth motor (42) is fixedly installed at the center of the top of the crushing barrel (21). The output end of the fifth motor (42) extends into the crushing barrel (21) and a limiting scraper (45) is fixedly installed. The outer wall of the limiting scraper (45) is tightly fitted with the bottom wall of the crushing barrel (21). The top of the crushing barrel (21) is provided with multiple air outlets (36). A filter screen (43) is provided on the inner wall of the air outlet (36).

2. The apparatus for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials according to claim 1, characterized in that: A condenser (16) is provided at the bottom of the preparation box (1). The condenser (16) is located directly above the horizontal conveyor belt (15). Heat dissipation holes (2) adapted to the condenser (16) are provided on the side wall of the preparation box (1).

3. The apparatus for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials according to claim 1, characterized in that: Multiple bearing plates (26) are uniformly fixedly installed on the outer wall of the vertical conveyor belt (17). A fourth motor (30) is also provided in the preparation box (1). A second sprocket (29) is fixedly installed at the output end of the fourth motor (30). The second sprocket (29) is fixedly connected to the central shaft of the outermost horizontal transmission roller (31). A first sprocket (28) is fixedly installed on the central shaft of the bottom vertical transmission roller (25). A transmission belt (27) is sleeved on the outer wall of the first sprocket (28) and the second sprocket (29).

4. The apparatus for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials according to claim 1, characterized in that: A heater (13) is provided at the bottom of the furnace (4), and a rotary valve (3) is rotatably installed at the top of the furnace (4). The bottom of the rotary valve (3) extends to the top of the discharge pipe (14) and is fixedly connected to a sealing plug (12).

5. The apparatus for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials according to claim 1, characterized in that: A first motor (8) is fixedly connected to the side wall of the first conveying pipe (6), and the output end of the first motor (8) extends into the first conveying pipe (6) and is fixedly connected to a first spiral blade roller (11).

6. The apparatus for preparing high-performance, high-corrosion-resistant sintered NdFeB permanent magnet materials according to claim 1, characterized in that: The drive assembly includes a third motor (19) fixedly installed on the bottom wall of the preparation box (1), and a gear (40) is fixedly connected to the output end of the third motor (19). An annular rack ring (38) adapted to the gear (40) is fixedly installed on the bottom wall of the crushing barrel (21).

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