Neodymium-iron-boron permanent magnet raw material flour mill and operation method

Abstract

The invention relates to the technical field of ball mills, in particular to a neodymium iron boron permanent magnet raw material pulverizer and an operation method. Comprising a supporting frame, a fixed cylinder, a controller, rotating cylinders and the like, the fixed cylinder is connected to the supporting frame and obliquely arranged, a feeding port and an air inlet are formed in one side of the fixed cylinder, a discharging port is formed in the other side of the fixed cylinder, the controller is installed on the side face of the supporting frame, and the rotating cylinders are rotationally connected into the fixed cylinder at intervals; and tooth holes are circumferentially formed in the outer wall of the rotating cylinder at intervals. According to the multi-stage grinding system, the multiple rotating cylinders are designed, grinding media of different sizes are placed in the rotating cylinders, the sizes of the grinding media are gradually reduced from left to right, the multi-stage grinding system can automatically achieve the process from coarse grinding to fine grinding, the grinding media do not need to be manually replaced stage by stage, and therefore the grinding efficiency can be remarkably improved, and the grinding efficiency is improved. The continuity and stability of the grinding process are ensured, product quality fluctuation caused by manual operation is avoided, and the magnetic performance and purity of a final product are improved.

Description

Technical Field

[0001] The invention relates to the technical field of ball mills, and in particular to a NdFeB permanent magnet raw material powder making machine and an operating method thereof. Background Art

[0002] NdFeB permanent magnet materials are widely used in high-tech fields such as electronics, automobiles, wind power generation, and medical equipment due to their excellent magnetic properties. As one of the permanent magnet materials with the highest magnetic energy product in the world, NdFeB plays an indispensable role in modern industry. However, to produce high-quality NdFeB permanent magnets, the fineness of the raw materials is crucial, because the particle size and uniformity of the raw material powder are directly related to the magnetic properties of the final product. Therefore, efficient and precise grinding of NdFeB raw materials is a key link in the production process.

[0003] When processing NdFeB raw materials, traditional ball mills usually need to use larger grinding media to quickly crush larger particles in the initial stage in order to effectively reduce the original particle size due to the high hardness of NdFeB materials. As the particle size of the material gradually decreases, continuing to use large-sized grinding media will result in excessive impact force, which is likely to cause over-crushing or unnecessary thermal effects, which not only affects the purity of the raw materials, but may also change its crystal structure, thereby affecting the magnetic properties of the final product. Therefore, subsequent operators must replace smaller-sized grinding media to gradually refine the materials. Each replacement of the grinding media requires stopping the ball mill, cleaning the internal residue, and reloading new grinding media. This process is not only cumbersome and time-consuming, but also reduces overall work efficiency. More importantly, frequent replacement of grinding media makes it difficult to ensure the consistency of each grinding condition, which may cause fluctuations in product quality between different batches and fail to meet the requirements of high-precision applications. Summary of the invention

[0004] In view of this, the present invention provides a NdFeB permanent magnet raw material powder making machine and an operating method, which can overcome the shortcomings of the existing ball mill that when processing NdFeB raw materials, it is necessary to manually replace the grinding media with smaller sizes step by step to gradually refine the material. This process is not only cumbersome and time-consuming, but also reduces the overall work efficiency and it is difficult to ensure the consistency of the grinding conditions each time.

[0005] The technical solution is: a NdFeB permanent magnet raw material powder making machine, including a support frame, a fixed cylinder, a controller, a rotating cylinder, a filter plate, a sealing ring, a driving mechanism and a discharging mechanism. The fixed cylinder is connected to the support frame, and the fixed cylinder is inclined. A feed port and an air inlet are opened on one side of the fixed cylinder, and a discharge port is opened on the other side of the fixed cylinder. The controller is installed on the side of the support frame. The rotating cylinder is rotatably connected to the inside of the fixed cylinder at intervals, and tooth holes are circumferentially spaced on the outer wall of the rotating cylinder. Both sides of the rotating cylinder are open designs. The filter plate is connected to the opening of the rotating cylinder near the discharge port, and the filter hole diameter of the filter plate decreases from left to right. The sealing ring is connected to the outer wall of the rotating cylinder. The driving mechanism is used to drive the rotating cylinder to rotate, and the discharge mechanism is used to discharge the ground material in the rotating cylinder.

[0006] As a further preferred scheme, the driving mechanism includes a first driving motor, a rotating rod, a support seat, a first gear, a second gear, a pulley assembly and a third gear. The first driving motor is installed on the outer wall of the fixed cylinder, the rotating rod is connected to the output shaft of the first driving motor, the support seat is connected to the outer wall of the fixed cylinder at an interval, and the rotating rod rotates through the support seat, the first gear is rotatably connected to the support seat, and the first gear is meshed with the tooth hole, the second gear is rotatably connected to the support seat, and the second gear is located on the side of the first gear, the second gear and the rotating rod are transmitted through the pulley assembly, the third gear is connected to the side of the first gear, and the third gear is meshed with the second gear, and the diameter of the third gear decreases from left to right.

[0007] As a further preferred scheme, the discharging mechanism includes a fixed plate, a blower and a guide assembly. The fixed plate is connected to the outer wall of the fixed cylinder, the blower is installed on the fixed plate, and the air outlet of the blower is connected to the air inlet and maintained in communication. The guide assembly is used to guide and collect the material blown out from the discharge port.

[0008] As a further preferred scheme, the guide assembly includes a tee pipe, a servo motor and a rotating tube. The tee pipe is connected to the discharge port, the servo motor is installed on the outer wall of the tee pipe, the rotating tube is rotatably connected to the inside of the tee pipe, a notch is opened on the side of the rotating tube, one end of the rotating tube is aligned with the discharge port, and the rotating tube is connected to the output shaft of the servo motor.

[0009] As a further preferred scheme, it also includes a rubber ring, a second drive motor, a first clamping plate, a second clamping plate and a connecting gear, the rubber ring is connected to the other two ends of the three-way pipe, the second drive motor is symmetrically installed on the other two ends of the three-way pipe, the first clamping plate is connected to the output shaft of the second drive motor, the second clamping plate is rotatably connected to the other two ends of the three-way pipe, the connecting gears are respectively connected to the ends of the first clamping plate and the second clamping plate, and the connecting gears on the first clamping plate and the second clamping plate are meshed with each other.

[0010] As a further preferred solution, it also includes a cold air fan and a connecting pipe. The cold air fan is installed on the side of the support frame, and the connecting pipe connects the air outlet of the cold air fan and the air inlet of the blower.

[0011] As a further preferred scheme, it also includes an air pump, an air supply pipe and a diversion pipe. The air pump is installed on the outer wall of the fixed cylinder, the air supply pipe is connected to the air outlet of the air pump, the diversion pipe is connected to the outer wall of the fixed cylinder at intervals, and one end of the diversion pipe is connected to the air supply pipe and maintained in communication, and the other end of the diversion pipe is spaced apart with a square hole.

[0012] The present invention also provides an operating method of a NdFeB permanent magnet raw material powder making machine, comprising the following steps: first, a controller is used to control a second drive motor to drive the first clamping plate to rotate upward and open, and at the same time, through the meshing action of the connecting gears, the first clamping plate can drive the second clamping plate to rotate downward and open, and then two cloth bags are respectively sleeved on the two ends of the right side of the three-way pipe, and then the controller is used to control the second drive motor to drive the first clamping plate to rotate downward and reset, and at the same time, drive the second clamping plate to rotate upward and reset, ensuring that the first clamping plate and the second clamping plate are in close contact and clamp the cloth bag, so that the cloth bag is firmly fixed at the end of the three-way pipe, and then the controller is used to control the first drive motor to drive the rotating rod to rotate, and the rotating rod drives the second gear through the pulley assembly. The wheel rotates, and the second gear drives the first gear to rotate through the third gear, and finally the first gear drives the rotating cylinder to rotate, and then the NdFeB raw material is put into the fixed cylinder from the feed inlet. Since the fixed cylinder is tilted, the NdFeB raw material in the fixed cylinder will slide to the lower right, and at this time the NdFeB raw material will first fall into the leftmost rotating cylinder, so that the grinding medium of the leftmost rotating cylinder can grind the NdFeB raw material for the first time, and then the NdFeB raw material will pass through the leftmost filter plate and fall into the second rotating cylinder from the left to the right, so as to grind the NdFeB raw material for the second time, and so on and so forth, the NdFeB raw material can be ground five times step by step to ensure that the NdFeB raw material can be ground to a suitable fineness.

[0013] The present invention has the following advantages: 1. The present invention designs multiple rotating drums, each of which contains grinding media of different sizes, and the size of the grinding media gradually decreases from left to right. This multi-stage grinding system can automatically realize the process from coarse grinding to fine grinding without manual replacement of grinding media step by step, thereby significantly improving the grinding efficiency, ensuring the continuity and stability of the grinding process, avoiding product quality fluctuations caused by human operation, and improving the magnetic properties and purity of the final product.

[0014] 2. The present invention can effectively cool down the high temperature in the grinding process by introducing components such as air coolers, blowers and air pumps, prevent overheating from damaging the equipment and materials, and extend the service life of the equipment. The injection of cold air helps to maintain the purity of the NdFeB raw material and avoid changes in material properties caused by high temperature. The air flow from right to left generated by the air pump through the air pipe and the diversion pipe can clear the blockage on the filter plate, ensure smooth movement of materials, and further improve grinding efficiency and product quality.

[0015] 3. The present invention can realize continuous discharge and collection of grinding materials by designing components such as a three-way pipe, a servo motor and a rotating tube. When one bag is full of materials, the servo motor drives the rotating tube to rotate 180 degrees, so that another bag starts to collect materials. The whole process does not require shutdown, ensuring the continuity of production. The design of the first clamping plate and the second clamping plate makes the installation and replacement of the bags more convenient, further simplifies the operating process, and reduces labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 The figure is a schematic diagram of the installation of the rotating cylinder, the filter plate and the sealing ring of the present invention.

[0018] Figure 3 It is a schematic diagram of the installation of the driving mechanism of the present invention.

[0019] Figure 4 It is a schematic diagram of the specific structure of the driving mechanism of the present invention.

[0020] Figure 5 It is a schematic diagram of the installation of the discharging mechanism of the present invention.

[0021] Figure 6 It is a cross-sectional view of the three-way pipe of the present invention.

[0022] Figure 7 It is a schematic diagram of the specific structure of the outer wall of the three-way pipe of the present invention.

[0023] Figure 8 The figure is a schematic diagram of the installation of the air cooler and the connecting pipe of the present invention.

[0024] Fig. 9 The figure is a schematic diagram of the installation of the air pump, the air delivery pipe and the diversion pipe of the present invention.

[0025] Fig.10 It is a schematic diagram of the specific structure of the shunt pipe of the present invention.

[0026] Wherein: 1-support frame, 2-fixed cylinder, 201-feed port, 202-air inlet, 203-discharge port, 3-controller, 4-rotating cylinder, 401-tooth hole, 5-filter plate, 6-sealing ring, 7-first drive motor, 8-rotating rod, 9-support seat, 10-first gear, 11-second gear, 12-pulley assembly, 13-third gear, 14-fixed plate, 15-blower, 16-tee pipe, 17-servo motor, 18-rotating pipe, 1801-notch, 19-rubber ring, 20-second drive motor, 21-first splint, 22-second splint, 23-connecting gear, 24-cooling fan, 25-connecting pipe, 26-air pump, 27-air pipe, 28-diverter pipe, 2801-square hole. DETAILED DESCRIPTION

[0027] The technical solution is further described below in conjunction with specific embodiments. It should be noted that the words indicating directions such as up, down, left, and right mentioned in this article are only for the position of the structure shown in the corresponding drawings. The serial numbers of the parts in this article, such as first, second, etc., are only used to distinguish the objects described and do not have any order or technical meaning. The words such as connection and coupling in this application include direct and indirect connection (coupling) unless otherwise specified.

[0028] Embodiment: A NdFeB permanent magnet raw material powder making machine, such as Figure 1-Figure 6 As shown, it includes a support frame 1, a fixed cylinder 2, a controller 3, a rotating cylinder 4, a filter plate 5, a sealing ring 6, a driving mechanism and a discharging mechanism. The top of the support frame 1 is connected to the fixed cylinder 2, and the fixed cylinder 2 is tilted with the left side higher than the right side. A feed port 201 is opened on the left side of the top of the fixed cylinder 2, an air inlet 202 is opened at the left end of the fixed cylinder 2, and a discharge port 203 is opened at the right end of the fixed cylinder 2. The controller 3 is installed in the middle of the front side of the support frame 1. Five rotating cylinders 4 are axially spaced and rotatably connected inside the fixed cylinder 2. The rotating cylinder 4 is used to place grinding media for grinding NdFeB raw materials, and the grinding media inside the five rotating cylinders 4 are large. The five rotating cylinders 4 are all inclined with the left side higher and the right side lower, and the outer walls of the five rotating cylinders 4 are circumferentially spaced with tooth holes 401 on the right side, and the left and right sides of the five rotating cylinders 4 are open-type designs, and the right sides of the five rotating cylinders 4 are connected to filter plates 5, and the filter hole diameters of the five filter plates 5 decrease from left to right to adapt to grinding media of different sizes, and the right sides of the outer walls of the rotating cylinders 4 are connected to sealing rings 6, and the outer wall of the sealing ring 6 contacts the inner wall of the fixed cylinder 2, the driving mechanism is used to drive the rotating cylinder 4 to rotate, and the discharging mechanism is used to discharge the ground material in the rotating cylinder 4.

[0029] like Figure 3 and Figure 4As shown, the driving mechanism includes a first driving motor 7, a rotating rod 8, a supporting seat 9, a first gear 10, a second gear 11, a pulley assembly 12 and a third gear 13. The first driving motor 7 is installed on the right front side of the fixed cylinder 2, and the rotating rod 8 is connected to the output shaft of the first driving motor 7. The left end of the rotating rod 8 is rotatably connected to the left front side of the fixed cylinder 2. Five supporting seats 9 are evenly spaced and connected to the front side of the fixed cylinder 2, and the rotating rod 8 rotates through the supporting seats 9. The lower parts of the five supporting seats 9 are all rotatably connected with the first gears 10. The five first gears 10 correspond to the five rotating cylinders 4 one by one, and the first gears 10 are meshed with the tooth holes 401 on the corresponding rotating cylinders 4. The five first gears 10 are all rotatably connected with a second gear 11, and the second gear 11 is located at the upper left of the first gear 10. The pulley assembly 12 consists of two pulleys and a flat belt. The two pulleys are respectively connected to the left side of the second gear 11 and the rotating rod 8. The flat belt is wound around the two pulleys so that the second gear 11 and the rotating rod 8 can be transmitted through the pulley assembly 12. The left sides of the five first gears 10 are all connected with a third gear 13, and the third gear 13 corresponds to the second gear 11 one by one, and the third gear 13 is meshed with the corresponding second gear 11. The diameters of the five third gears 13 decrease from left to right, so that the rotation speeds of the five third gears 13 increase from left to right.

[0030] like Figure 5 and Figure 6 As shown, the discharging mechanism includes a fixed plate 14, a blower 15, a three-way pipe 16, a servo motor 17 and a rotating pipe 18. The fixed cylinder 2 is connected to the left end with the fixed plate 14, the blower 15 is installed on the fixed plate 14, and the air outlet of the blower 15 is connected to and maintained in communication with the air inlet 202 of the fixed cylinder 2, the three-way pipe 16 is connected to the discharge port 203 of the fixed cylinder 2, the servo motor 17 is installed in the middle of the three-way pipe 16, and the output shaft of the servo motor 17 rotates and passes through the right side of the inner wall of the three-way pipe 16, the rotating pipe 18 is rotatably connected to the left side of the three-way pipe 16, the left end of the rotating pipe 18 is aligned with the discharge port 203 of the fixed cylinder 2, and a notch 1801 is opened on the outer wall of the rotating pipe 18, and the right end of the rotating pipe 18 is connected to the output shaft of the servo motor 17.

[0031] like Figure 7As shown, it also includes a rubber ring 19, a second drive motor 20, a first clamping plate 21, a second clamping plate 22 and a connecting gear 23. The outer walls at both ends of the right side of the three-way pipe 16 are connected to the rubber ring 19, and the outer walls at both ends of the right side of the three-way pipe 16 are symmetrically installed with the second drive motors 20, and the first clamping plate 21 is connected between the output shafts of the two second drive motors 20. The outer walls at both ends of the right side of the three-way pipe 16 are rotatably connected with the second clamping plate 22, and the second clamping plate 22 is located below the first clamping plate 21, and the middle parts of the first clamping plate 21 and the second clamping plate 22 are both arc-shaped and fit with the outer wall of the end of the three-way pipe 16, and the front and rear ends of the first clamping plate 21 and the second clamping plate 22 are connected to the connecting gear 23, and the connecting gears 23 on the first clamping plate 21 and the second clamping plate 22 are meshed with each other.

[0032] like Figure 8-Figure 10 As shown, it also includes an air cooler 24, a connecting pipe 25, an air pump 26, an air pipe 27 and a shunt pipe 28. The air cooler 24 is installed on the left side of the support frame 1, and a connecting pipe 25 is connected between the air outlet of the air cooler 24 and the air inlet 202 of the blower 15. An air pump 26 is installed on the right side of the top of the fixed cylinder 2, and an air pipe 27 is connected to the air outlet of the air pump 26. Five shunt pipes 28 are evenly spaced and connected to the top of the fixed cylinder 2. The upper ends of the five shunt pipes 28 are connected to the air pipe 27 and remain connected. The five shunt pipes 28 correspond to the five filter plates 5 one by one, and the lower ends of the shunt pipes 28 are located on the right side of the corresponding filter plate 5. The left sides of the five shunt pipes 28 are spaced apart from top to bottom by a plurality of square holes 2801.

[0033] The present invention also provides an operating method of a NdFeB permanent magnet raw material powder making machine, comprising the following steps: before the equipment is started, the notch 1801 on the rotating tube 18 faces forward, the grinding media are pre-installed in the five rotating cylinders 4, and the size of the grinding media gradually decreases from left to right; first, the controller 3 controls the second drive motor 20 to drive the first clamping plate 21 to rotate upward and open, and at the same time, through the meshing action of the connecting gear 23, the first clamping plate 21 can drive the second clamping plate 22 to rotate downward and open, and then the two cloth bags can be manually put on the right ends of the three-way pipe 16 respectively, and then the controller 3 controls the second drive motor 20 to drive the first clamping plate 21 to rotate downward and reset, and at the same time drive the second clamping plate 22 to rotate upward and reset, to ensure that the first clamping plate 21 and the second clamping plate 22 are rotated and reset. The cloth bag is tightly contacted and clamped so that the cloth bag is firmly fixed on the end of the three-way pipe 16. The inner wall of the cloth bag is in contact with the rubber ring 19, which can ensure the seal between the cloth bag and the end of the three-way pipe 16; then the controller 3 controls the first drive motor 7 to drive the rotating rod 8 to rotate, and the rotating rod 8 drives the second gear 11 to rotate through the pulley assembly 12, and the second gear 11 then drives the first gear 10 to rotate through the third gear 13, and finally the first gear 10 drives the rotating cylinder 4 to rotate; then the NdFeB raw material can be put into the fixed cylinder 2 from the feed port 201. Since the fixed cylinder 2 is tilted, the NdFeB raw material in the fixed cylinder 2 will slide to the lower right. At this time, the NdFeB raw material will first fall into the rotating cylinder 4 on the far left, so that the grinding medium of the rotating cylinder 4 on the far left can The NdFeB raw material is ground for the first time, and then the NdFeB raw material will fall into the second rotating cylinder 4 from the left to the right through the leftmost filter plate 5, so as to be ground for the second time. The sealing ring 6 plays a sealing role, which can prevent the NdFeB raw material from being stuck in the gap between the rotating cylinder 4 and the fixed cylinder 2. In this way, the NdFeB raw material can be ground five times step by step to ensure that the NdFeB raw material can be ground to a suitable fineness. During the grinding process of the NdFeB raw material, the blower 15 and the cooler 24 can be controlled by the controller 3 to start working, and the cooler 24 can deliver cold air to the blower 15, and the blower 15 can quickly inject cold air into the fixed cylinder 2 from the air inlet 202, so that the grinding media and the NdFeB raw material inside the five rotating cylinders 4 can be ground in turn. The temperature is lowered, which can not only extend the service life of the entire equipment, but also ensure the purity and performance of the NdFeB raw material. At the same time, there can always be an airflow from left to right inside the fixed cylinder 2, so as to assist the NdFeB raw material inside the fixed cylinder 2 to move from left to right; after the NdFeB raw material has been ground five times, the NdFeB raw material will be blown into the rotating tube 18 by the airflow, and enter the three-way pipe 16 through the notch 1801 of the rotating tube 18, and finally fall into the cloth bag on the front side. When the cloth bag on the front side is full of materials, the servo motor 17 can be controlled by the controller 3 to drive the rotating tube 18 to rotate 180 degrees, so that the notch 1801 faces the rear, and the material then enters the cloth bag on the rear side. In this way, the cloth bag on the front side can be replaced manually without stopping the machine, so as to realize continuous collection of the ground material;During the grinding process, the air pump 26 can be started by the controller 3, and the air pump 26 generates an airflow from right to left at the square hole 2801 through the air pipe 27 and the diverter pipe 28. The airflow can be blown to the filter plate 5, and the materials stuck in the filter holes of the filter plate 5 are blown back to the rotating cylinder 4 for re-grinding. Since the width of the square hole 2801 is small, the airflow is concentrated around the square hole, and the intensity is large, which can effectively remove the blockage on the filter plate 5 without significantly affecting the overall airflow inside the fixed cylinder 2, ensuring that the materials in the fixed cylinder 2 can move to the right normally; since the right side The grinding media in the rotating drum 4 is smaller than that in the left rotating drum 4. If the rotation speeds of the five rotating drums 4 are the same, the grinding efficiency in the right rotating drum 4 will be lower than that in the left rotating drum 4. This will cause the material to accumulate inside the right rotating drum 4 and be difficult to handle in time. Therefore, the diameters of the five third gears 13 of the device decrease from left to right, which can increase the rotation speeds of the five rotating drums 4 from left to right, so that the grinding efficiency of the right rotating drum 4 can be higher than that of the left rotating drum 4, preventing the accumulation of materials. ;

[0034] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A NdFeB permanent magnet raw material powder making machine, comprising a support frame (1) and a fixed cylinder (2), wherein the fixed cylinder (2) is connected to the support frame (1) and is arranged in an inclined manner, a feed inlet (201) and an air inlet (202) are provided on one side of the fixed cylinder (2), and a discharge port (203) is provided on the other side of the fixed cylinder (2), characterized in that: The invention also comprises a controller (3), a rotating cylinder (4), a filter plate (5), a sealing ring (6), a driving mechanism and a discharging mechanism. The controller (3) is mounted on the side of the support frame (1). The rotating cylinder (4) is connected to the interior of the fixed cylinder (2) by being rotatably connected at intervals. The outer wall of the rotating cylinder (4) is provided with tooth holes (401) at intervals in the circumferential direction. Both sides of the rotating cylinder (4) are open-type designs. The filter plate (5) is connected to the opening of the rotating cylinder (4) on one side close to the discharging port (203). The filter hole diameter of the filter plate (5) decreases from left to right. The sealing ring (6) is connected to the outer wall of the rotating cylinder (4). The driving mechanism is used to drive the rotating cylinder (4) to rotate. The discharging mechanism is used to discharge the ground material in the rotating cylinder (4).

2. A NdFeB permanent magnet raw material powder making machine as claimed in claim 1, characterized in that: The driving mechanism comprises a first driving motor (7), a rotating rod (8), a supporting seat (9), a first gear (10), a second gear (11), a pulley assembly (12) and a third gear (13), wherein the first driving motor (7) is mounted on the outer wall of the fixed cylinder (2), the rotating rod (8) is connected to the output shaft of the first driving motor (7), the supporting seat (9) is connected to the outer wall of the fixed cylinder (2) at intervals, and the rotating rod (8) rotates through the supporting seat (9), and the first gear (10) is rotatably connected to the supporting seat (9). The first gear (10) is meshed with the tooth hole (401), the second gear (11) is rotatably connected to the support base (9), and the second gear (11) is located on the side of the first gear (10), the second gear (11) and the rotating rod (8) are transmitted through a pulley assembly (12), the third gear (13) is connected to the side of the first gear (10), and the third gear (13) is meshed with the second gear (11), and the diameter of the third gear (13) decreases from left to right.

3. A NdFeB permanent magnet raw material pulverizing machine as claimed in claim 2, characterized in that: The discharge mechanism comprises a fixed plate (14), a blower (15) and a guide assembly, wherein the fixed plate (14) is connected to the outer wall of the fixed cylinder (2), the blower (15) is mounted on the fixed plate (14), and the air outlet of the blower (15) is connected to and maintained in communication with the air inlet (202), and the guide assembly is used to guide and collect the material blown out from the discharge port (203).

4. A NdFeB permanent magnet raw material pulverizing machine as claimed in claim 3, characterized in that: The guide assembly comprises a three-way pipe (16), a servo motor (17) and a rotating pipe (18); the three-way pipe (16) is connected to the discharge port (203); the servo motor (17) is mounted on the outer wall of the three-way pipe (16); the rotating pipe (18) is rotatably connected to the inside of the three-way pipe (16); a notch (1801) is formed on the side of the rotating pipe (18); one end of the rotating pipe (18) is aligned with the discharge port (203); and the rotating pipe (18) is connected to the output shaft of the servo motor (17).

5. A NdFeB permanent magnet raw material pulverizing machine as claimed in claim 4, characterized in that: The invention also comprises a rubber ring (19), a second drive motor (20), a first clamping plate (21), a second clamping plate (22) and a connecting gear (23), wherein the rubber ring (19) is connected to the other two ends of the three-way pipe (16), the second drive motor (20) is symmetrically mounted on the other two ends of the three-way pipe (16), the first clamping plate (21) is connected to the output shaft of the second drive motor (20), the second clamping plate (22) is rotatably connected to the other two ends of the three-way pipe (16), and the connecting gear (23) is respectively connected to the ends of the first clamping plate (21) and the second clamping plate (22), and the connecting gears (23) on the first clamping plate (21) and the second clamping plate (22) are meshed with each other.

6. A NdFeB permanent magnet raw material pulverizing machine as claimed in claim 5, characterized in that: It also includes a cooling fan (24) and a connecting pipe (25), wherein the cooling fan (24) is installed on the side of the support frame (1), and the connecting pipe (25) connects the air outlet of the cooling fan (24) and the air inlet (202) of the blower (15).

7. A NdFeB permanent magnet raw material pulverizing machine as claimed in claim 6, characterized in that: It also includes an air pump (26), an air delivery pipe (27) and a diverter pipe (28), wherein the air pump (26) is mounted on the outer wall of the fixed cylinder (2), the air delivery pipe (27) is connected to the air outlet of the air pump (26), the diverter pipe (28) is connected to the outer wall of the fixed cylinder (2) at intervals, and one end of the diverter pipe (28) is connected to the air delivery pipe (27) and maintained in communication, and the other end of the diverter pipe (28) is spaced apart with a square hole (2801).

8. The method for operating a NdFeB permanent magnet raw material pulverizing machine according to claim 7, characterized in that: The method comprises the following steps: firstly, the controller (3) controls the second drive motor (20) to drive the first clamping plate (21) to rotate upward and open, and at the same time, through the meshing action of the connecting gear (23), the first clamping plate (21) can drive the second clamping plate (22) to rotate downward and open, and then the two cloth bags are respectively sleeved on the right ends of the three-way pipe (16), and then the controller (3) controls the second drive motor (20) to drive the first clamping plate (21) to rotate downward and reset, and at the same time, drives the second clamping plate (22) to rotate upward and reset, ensuring that the first clamping plate (21) and the second clamping plate (22) are in close contact and clamp the cloth bag, so that the cloth bag is firmly fixed to the end of the three-way pipe (16), and then the controller (3) controls the first drive motor (7) to drive the rotating rod (8) to rotate, and the rotating rod (8) drives the second gear (12) to rotate through the pulley assembly (12). (11) rotates, the second gear (11) then drives the first gear (10) to rotate through the third gear (13), and finally the first gear (10) drives the rotating cylinder (4) to rotate, and then the NdFeB raw material is put into the fixed cylinder (2) from the feed port (201). Since the fixed cylinder (2) is inclined, the NdFeB raw material in the fixed cylinder (2) will slide to the lower right, and at this time, the NdFeB raw material will first fall into the leftmost rotating cylinder (4), so that the grinding medium of the leftmost rotating cylinder (4) can grind the NdFeB raw material for the first time, and then the NdFeB raw material will pass through the leftmost filter plate (5) and fall into the second rotating cylinder (4) from the left to the right, so as to grind the NdFeB raw material for the second time. In this way, the NdFeB raw material can be ground five times step by step to ensure that the NdFeB raw material can be ground to a suitable fineness.

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