An air flow grinding device for sintered NdFeB permanent magnet material

Abstract

The present invention discloses an airflow grinding and pulverizing device for sintered NdFeB permanent magnet material, which relates to the technical field of airflow pulverizing technology, and comprises a rotating box, a circular frame rotatably sleeved on the rotating box, a plurality of support legs fixedly connected to the circular frame, and two fixed frames fixedly connected to the circular frame. The present invention sets a grinding unit, wherein a compressor introduces gas into the circular frame through a Y-shaped air inlet pipe, then enters a fixed shell through an air vent and is ejected from an air outlet. Under the action of high-pressure airflow, the materials in the rotating box collide with each other to be crushed. A first motor is started to drive the drive shaft and the rotating gear to rotate, and the rotating gear drives the circular rack, the rotating box and the fixed shell to rotate, so that the material can collide with the fixed shell, thereby improving the pulverizing effect of the material. The airflow ejected from the air outlet drives the material through the Y-shaped groove, thereby forming a narrow tube effect, so that the material can fully collide, thereby improving the crushing effect of the material.

Description

Technical Field

[0001] The invention relates to the technical field of airflow pulverizing technology, in particular to an airflow grinding pulverizing device for sintered NdFeB permanent magnet material. Background Art

[0002] Sintered NdFeB permanent magnets are widely used in motors, electronic equipment, and other fields due to their excellent magnetic properties. Powdering is a key step in the preparation process, and its quality directly affects the performance of the final product.

[0003] Chinese patent publication number CN116273379A discloses an airflow grinding device for sintered NdFeB permanent magnet material, including a fuselage, a compressor fixedly mounted on the fuselage, a motor base fixedly mounted on the right side of the fuselage, a box door hinged to the front of the fuselage, a handle fixedly mounted on the front of the box door, a collection box arranged on the left side of the fuselage, and a processing assembly arranged inside the fuselage, the processing assembly including a separation mechanism fixedly mounted inside the fuselage, a feeding mechanism arranged above the separation mechanism, a screening mechanism connected below the separation mechanism, the bottom of the connecting column fixedly mounted to the screening plate, the material of the connecting column is made of a material that repels magnets, the bottom of the second solid column fixedly mounted to the connecting block, and the connecting block fixedly mounted to the screening plate.

[0004] Based on the above search and the existing technology, it was found that during the crushing process of existing sintered NdFeB permanent magnets, the material collision is not sufficient and the material has different shapes and sizes, resulting in poor crushing effect and uneven particle size distribution. The collision between high-speed airflow and material will generate a lot of heat. If it cannot be cooled in time, it may cause material oxidation or equipment damage. Summary of the Invention

[0005] The object of the present invention is to provide a device for airflow grinding and pulverizing sintered NdFeB permanent magnet materials to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: an airflow grinding device for sintering NdFeB permanent magnet material, comprising a rotating box, a circular frame rotatably sleeved on the rotating box, a plurality of support legs fixedly connected to the circular frame, two fixed frames fixedly connected to the circular frame, and further comprising:

[0007] A fixed cover, the fixed cover being rotatably connected to the top of the rotating box, and the top ends of the two fixing frames being fixedly connected to the fixed cover;

[0008] A powder making mechanism, the powder making mechanism being located on the rotating box;

[0009] The powder making mechanism includes a grinding unit, a pre-crushing unit and a cooling unit, and the grinding unit includes a plurality of fixed shells fixedly connected to the inner wall of the rotating box, and a group of air outlet holes are provided on each of the plurality of fixed shells, and a plurality of Y-shaped grooves are provided on the rotating box, and one end of the Y-shaped groove is facing the blowing direction of the air outlet holes, and a Y-shaped air inlet pipe is provided on one side of the circular ring frame, and one end of the Y-shaped air inlet pipe is fixedly connected to the circular ring frame, and four air vents are provided on the rotating box, and the four air vents are respectively connected to the four fixed shells, and a first motor is fixedly connected to one of the support legs, and the output end of the first motor is connected to a drive shaft through a coupling, a rotating gear is fixedly sleeved on the drive shaft, and a circular rack is fixedly sleeved on the rotating box, and the rotating gear is meshed with the circular rack.

[0010] Preferably, the pre-crushing unit includes a feed pipe fixedly connected to the top of the fixed cover, the top of the feed pipe is fixedly connected to a crushing box, two rotating tubes are rotatably connected to the crushing box, both rotating tubes are fixedly sleeved with crushing rollers, both rotating tubes are fixedly sleeved with transmission gears, the two transmission gears are meshed with each other, a second motor is fixedly connected to the crushing box, the output end of the second motor is fixedly connected to a drive gear, and the drive gear is meshed with one of the transmission gears.

[0011] Preferably, the inner wall of the crushing box is slidably connected to a filter screen, the inner wall of the feed pipe is fixedly connected to a bracket, the bracket is rotatably connected to a rotating shaft, the rotating shaft is fixedly sleeved with a first auger blade, the bottom end of the rotating shaft is fixedly connected to a fixing rod, and one end of the fixing rod is fixedly connected to the inner wall of the rotating box.

[0012] Preferably, two telescopic rods are fixedly connected to the inner wall of the crushing box, the top ends of the two telescopic rods are fixedly connected to the bottom of the filter screen, the top end of the rotating shaft is fixedly connected to a bevel block, the bottom of the filter screen is fixedly connected to an L-shaped rod, and the bevel block contacts the L-shaped rod when it rotates in a circle.

[0013] Preferably, a telescopic spring is sleeved on each of the two telescopic rods, and two ends of the telescopic spring are fixedly connected to the telescopic rod and the filter screen respectively.

[0014] Preferably, the crushing box is fixedly connected to a fixed cylinder, the second auger blade is rotatably connected to the fixed cylinder, the top end of the drive shaft is fixedly connected to the bottom end of the second auger blade, the fixed cylinder and the crushing box are commonly fixedly connected to a feed channel, the top end of the fixed cylinder is fixedly connected to a discharge channel, and the discharge channel is located directly above the crushing box.

[0015] Preferably, the cooling unit includes an air outlet pipe fixedly connected to the fixed cover, one end of the air outlet pipe is fixedly connected to a bag dust collector, the bag dust collector is fixedly connected to an L-shaped pipe on a side away from the air outlet pipe, the bottom end of the L-shaped pipe is fixedly connected to a cooling box, the cooling box is fixedly connected to a pressure pump, the pressure pump and the Y-shaped air inlet pipe are commonly connected to a connecting pipe, the other end of the Y-shaped air inlet pipe is fixedly connected to a fixed pipe, the top end of the fixed pipe is rotatably connected to one end of one of the rotating tubes, one end of the other rotating tube is rotatably connected to a bending tube, the other ends of the two rotating tubes are commonly rotatably connected to a U-shaped pipe, and the U-shaped pipe is fixedly connected to the crushing box.

[0016] Preferably, a plurality of dust cloths are fixedly connected to the inner wall of the bag dust collector, a plurality of jet pipes are fixedly connected to the bag dust collector, one end of the plurality of jet pipes is commonly connected to a mounting pipe, the bottom end of the bent pipe is fixedly connected to the mounting pipe, a valve is installed on the mounting pipe, a branch pipe is fixedly connected to the mounting pipe, and a pressure valve is installed on the branch pipe.

[0017] Preferably, a discharge pipe is fixedly connected to the top of the fixed cover.

[0018] The present invention provides an improved airflow grinding device for sintered NdFeB permanent magnet material, which has the following improvements and advantages compared with the prior art:

[0019] First, the present invention sets a grinding unit, and the compressor introduces gas into the annular frame through the Y-shaped air inlet pipe, and then enters the fixed shell through the air vent and is ejected from the air outlet. Under the action of the high-pressure airflow, the materials in the rotating box collide with each other to be crushed, and the first motor is started to drive the drive shaft and the rotating gear to rotate. The rotation of the rotating gear drives the annular rack, the rotating box and the fixed shell to rotate, so that the material can collide with the fixed shell, thereby improving the powder making effect of the material. Through the setting of the Y-shaped groove, the airflow ejected from the air outlet drives the material to pass through the Y-shaped groove, thereby forming a narrow tube effect, so that the material can fully collide, thereby improving the crushing effect of the material.

[0020] Second: The setting of the pre-crushing unit of the present invention, through the setting of the pre-crushing unit, the material is placed in the crushing box, the second motor is started to drive the driving gear to rotate, the driving gear rotation drives the two transmission gears to rotate, the two transmission gears rotation drive the rotating tube and the crushing roller to rotate, so that the crushing roller can pre-crush the material; at the same time, the rotating box drives the fixed rod to rotate, the fixed rod rotation drives the rotating shaft and the first auger blade to rotate, the rotation of the first auger blade can transport the crushed material into the rotating box, so that the material can be transported.

[0021] Third: The rotating shaft of the present invention drives the bevel block to rotate. Each time the bevel block rotates one circle, it drives the L-shaped rod and the filter screen to move upward once. When the bevel block is away from the L-shaped rod, the telescopic spring drives the filter screen to reset, and then drives the filter screen to vibrate, thereby improving the filtering effect of the filter screen; the rotation of the drive shaft drives the second auger blade to rotate, so that the larger material on the filter screen enters the fixed cylinder through the discharge channel. The rotation of the second auger blade drives the material to move upward, so that the material falls onto the crushing roller through the discharge channel, thereby realizing secondary crushing of unqualified materials.

[0022] Fourthly, the present invention sets a cooling unit, and the air flow entering the rotating box enters the bag dust collector through the air outlet pipe for dust removal, and then enters the cooling box through the L-shaped pipe for cooling, and finally the cooled air flow enters the Y-shaped air inlet pipe through the connecting rod, and is divided by the Y-shaped air inlet pipe, one way enters the rotating box to cool the fixed shell, and the other way enters the U-shaped pipe and the two rotating pipes through the fixed pipe, thereby cooling the crushing roller, closing the valve of the bending pipe, allowing the air flow to pass through the branch pipe and be sprayed into the bag dust collector by the jet pipe, and then the jet pipe performs pulse jet spray on the dust cloth, thereby cleaning the dust cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 Schematic diagram of the internal cross-section of the rotating box of the present invention;

[0026] Figure 3 Schematic diagram of the internal cross-section of the crushing box of the present invention;

[0027] Figure 4 Schematic diagram of the three-dimensional structure of the bevel block and the L-shaped rod in the present invention;

[0028] Figure 5 It is a schematic diagram of the cross-sectional plan structure of the rotating box and the circular ring frame in the present invention;

[0029] Figure 6 For the present invention Figure 2 A in the middle is an enlarged structural diagram;

[0030] Figure 7Schematic diagram of the three-dimensional structure of the cooling unit in the present invention;

[0031] Figure 8 It is a schematic diagram of the internal cross-sectional plan structure of the bag dust collector in the present invention.

[0032] Reference numerals:

[0033] 1. Rotating box; 11. Circular frame; 12. Fixed cover; 13. First motor; 14. Drive shaft; 15. Rotating gear; 16. Circular rack; 17. Fixed frame; 18. Discharge pipe; 19. Y-shaped air inlet pipe; 110. Fixed shell; 111. Air outlet; 112. Y-shaped groove; 113. Air vent; 2. Feed pipe; 21. Crushing box; 22. Rotating pipe; 23. Crushing roller; 24. Second motor; 25. Drive gear; 26. Transmission gear; 27. U-shaped pipe; 28. Telescopic rod; 29 , filter; 210, telescopic spring; 3, bracket; 31, rotating shaft; 32, first auger blade; 33, fixing rod; 34, bevel block; 35, L-shaped rod; 4, fixing cylinder; 41, second auger blade; 42, feed channel; 43, discharge channel; 5, bag filter; 51, air outlet pipe; 52, L-shaped pipe; 53, cooling box; 54, pressure pump; 55, connecting pipe; 56, fixing pipe; 57, bending pipe; 58, mounting pipe; 59, jet pipe; 510, dust cloth; 511, branch pipe. DETAILED DESCRIPTION

[0034] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] The present invention provides an improved airflow grinding device for sintered NdFeB permanent magnet material. The technical solution of the present invention is:

[0036] like Figures 1 to 8 As shown, an embodiment of the present invention provides an airflow grinding device for sintering NdFeB permanent magnet material, comprising a rotating box 1, a circular frame 11 rotatably sleeved on the rotating box 1, a plurality of support legs fixedly connected to the circular frame 11, two fixed frames 17 fixedly connected to the circular frame 11, and further comprising:

[0037] The fixed cover 12 is rotatably connected to the top of the rotating box 1, and the top ends of the two fixing brackets 17 are fixedly connected to the fixed cover 12;

[0038] The powder making mechanism is located on the rotating box 1;

[0039] The powder making mechanism includes a grinding unit, a pre-crushing unit and a cooling unit. The grinding unit includes a plurality of fixed shells 110 fixedly connected to the inner wall of the rotating box 1. A group of air outlet holes 111 are provided on the plurality of fixed shells 110. The rotating box 1 is provided with a plurality of Y-shaped grooves 112. One end of the Y-shaped groove 112 is facing the blowing direction of the air outlet holes 111. A Y-shaped air inlet pipe 19 is provided on one side of the circular frame 11. One end of the Y-shaped air inlet pipe 19 is fixedly connected to the circular frame 11. Four air vents 113 are provided on the rotating box 1. The four air vents 113 are respectively connected to the four fixed shells 110. A first motor 13 is fixedly connected to one of the supporting legs. The output end of the first motor 13 is connected to the driving shaft 14 through a coupling. A rotating gear 15 is fixedly sleeved on the driving shaft 14. A circular rack 16 is fixedly sleeved on the rotating box 1. The rotating gear 15 is connected to the The annular rack 16 is meshed with each other; through the setting of the grinding unit, the compressor introduces the gas into the annular frame 11 through the Y-shaped air inlet pipe 19, and then enters the fixed shell 110 through the air vent 113 and is ejected from the air outlet 111. Under the action of the high-pressure airflow, the materials in the rotating box 1 collide with each other and are crushed. The first motor 13 is started to drive the drive shaft 14 to rotate, and the drive shaft 14 drives the rotating gear 15 to rotate. The rotation of the rotating gear 15 drives the annular rack 16 and the rotating box 1 to rotate. The rotation of the rotating box 1 drives the fixed shell 110 to rotate, so that the material can collide with the fixed shell 110, thereby improving the powder making effect of the material. Through the setting of the Y-shaped groove 112, the airflow ejected from the air outlet 111 drives the material to pass through the Y-shaped groove 112, thereby forming a narrow tube effect, so that the material can fully collide, thereby improving the crushing effect of the material.

[0040] Furthermore, the pre-crushing unit includes a feed pipe 2 fixedly connected to the top of the fixed cover 12, and the top of the feed pipe 2 is fixedly connected to a crushing box 21, and two rotating tubes 22 are rotatably connected to the crushing box 21, and crushing rollers 23 are fixedly sleeved on the two rotating tubes 22, and transmission gears 26 are fixedly sleeved on the two rotating tubes 22, and the two transmission gears 26 are meshed with each other. A second motor 24 is fixedly connected to the crushing box 21, and a driving gear 25 is fixedly connected to the output end of the second motor 24, and the driving gear 25 is meshed with one of the transmission gears 26; through the setting of the pre-crushing unit, the material is placed in the crushing box 21, and the second motor 24 is started to drive the driving gear 25 to rotate, and the rotation of the driving gear 25 drives the two transmission gears 26 to rotate, and the rotation of the two transmission gears 26 drives the rotating tubes 22 and the crushing rollers 23 to rotate, so that the crushing rollers 23 pre-crush the material.

[0041] Furthermore, the inner wall of the crushing box 21 is slidingly connected to the filter screen 29, the inner wall of the feed pipe 2 is fixedly connected to the bracket 3, the bracket 3 is rotatably connected to the rotating shaft 31, the rotating shaft 31 is fixedly sleeved with the first auger blade 32, the bottom end of the rotating shaft 31 is fixedly connected to the fixing rod 33, one end of the fixing rod 33 is fixedly connected to the inner wall of the rotating box 1; through the setting of the first auger blade 32, the crushed material is screened through the filter screen 29 and falls into the bottom of the crushing box 21, the rotating box 1 drives the fixing rod 33 to rotate, and the rotation of the fixing rod 33 drives the rotating shaft 31 and the first auger blade 32 to rotate. The rotation of the first auger blade 32 can transport the crushed material into the rotating box 1, thereby realizing the transportation of the material.

[0042] Furthermore, two telescopic rods 28 are fixedly connected to the inner wall of the crushing box 21, and the top ends of the two telescopic rods 28 are fixedly connected to the bottom of the filter screen 29. The top end of the rotating shaft 31 is fixedly connected to a beveled block 34, and the bottom of the filter screen 29 is fixedly connected to an L-shaped rod 35. When the beveled block 34 rotates in a circle, it contacts the L-shaped rod 35. A telescopic spring 210 is sleeved on the two telescopic rods 28, and the two ends of the telescopic spring 210 are fixedly connected to the telescopic rod 28 and the filter screen 29 respectively; through the setting of the beveled block 34, the rotating shaft 31 drives the beveled block 34 to rotate, and each rotation of the beveled block 34 drives the L-shaped rod 35 and the filter screen 29 to move upward once. When the beveled block 34 is away from the L-shaped rod 35, the telescopic spring 210 drives the filter screen 29 to reset, and then can drive the filter screen 29 to vibrate, thereby improving the filtering effect of the filter screen 29.

[0043] Furthermore, the crushing box 21 is fixedly connected to a fixed cylinder 4, and a second auger blade 41 is rotatably connected to the fixed cylinder 4. The top of the drive shaft 14 is fixedly connected to the bottom end of the second auger blade 41. The fixed cylinder 4 and the crushing box 21 are fixedly connected to a feed channel 42. The top of the fixed cylinder 4 is fixedly connected to a discharge channel 43, and the discharge channel 43 is located directly above the crushing box 21. Through the setting of the second auger blade 41, the rotation of the drive shaft 14 drives the second auger blade 41 to rotate, so that the larger material on the filter screen 29 enters the fixed cylinder 4 through the discharge channel 43. The rotation of the second auger blade 41 drives the material to move upward, so that the material falls on the crushing roller 23 through the discharge channel 43, thereby realizing secondary crushing of the unqualified material.

[0044] Furthermore, the cooling unit includes an outlet pipe 51 fixedly connected to the fixed cover 12, one end of the outlet pipe 51 is fixedly connected to the bag dust collector 5, the side of the bag dust collector 5 away from the outlet pipe 51 is fixedly connected to an L-shaped pipe 52, the bottom end of the L-shaped pipe 52 is fixedly connected to a cooling box 53, the cooling box 53 is fixedly connected to a pressure pump 54, the pressure pump 54 and the Y-shaped air inlet pipe 19 are commonly connected to a connecting pipe 55, the other end of the Y-shaped air inlet pipe 19 is fixedly connected to a fixed pipe 56, the top end of the fixed pipe 56 is rotatably connected to one end of one of the rotating pipes 22, and one end of the other rotating pipe 22 is rotatably connected to the bending pipe 5 7. The other ends of the two rotating tubes 22 rotate together and are connected to a U-shaped tube 27, which is fixedly connected to the crushing box 21. Through the setting of the cooling unit, the airflow entering the rotating box 1 enters the bag dust collector 5 through the outlet pipe 51 for dust removal, and then enters the cooling box 53 through the L-shaped tube 52 for cooling. Finally, the cooled airflow enters the Y-shaped air inlet pipe 19 through the connecting rod, and is divided by the Y-shaped air inlet pipe 19. One path enters the rotating box 1 to cool the fixed shell 110, and the other path enters the U-shaped tube 27 and the two rotating tubes 22 through the fixed pipe 56, thereby cooling the crushing roller 23.

[0045] Furthermore, a plurality of dust cloths 510 are fixedly connected to the inner wall of the bag dust collector 5, and a plurality of jet pipes 59 are fixedly connected to the bag dust collector 5. One end of the plurality of jet pipes 59 is commonly connected to the mounting pipe 58. The bottom end of the bent pipe 57 is fixedly connected to the mounting pipe 58, and a valve is installed on the mounting pipe 58. The mounting pipe 58 is fixedly connected to a branch pipe 511, and a pressure valve is installed on the branch pipe 511. By setting the branch pipe 511, the valve of the bent pipe 57 is closed, so that the air flow passes through the branch pipe 511 and is sprayed into the bag dust collector 5 by the jet pipe 59, and then the jet pipe 59 performs pulse jetting on the dust cloth 510, thereby cleaning the dust cloth 510.

[0046] Furthermore, a discharge pipe 18 is fixedly connected to the top of the fixed cover 12; through the provision of the discharge pipe 18, the crushed material can be discharged.

[0047] Specific implementation steps: The Y-shaped air inlet pipe 19 is connected to the compressor, and the compressor introduces the gas into the annular frame 11 through the Y-shaped air inlet pipe 19, and then enters the fixed shell 110 through the air vent 113 and is ejected from the air outlet 111. Under the action of the high-pressure airflow, the materials in the rotating box 1 collide with each other to be crushed, and the first motor 13 is started to drive the driving shaft 14 to rotate, and the driving shaft 14 drives the rotating gear 15 to rotate, and the rotating gear 15 rotates to drive the annular rack 16 and the rotating box 1 to rotate, and the rotating box 1 rotates to drive the fixed shell 110 to rotate, so that the material can collide with the fixed shell 110, thereby improving the powdering effect of the material. By setting the Y-shaped groove 112, the airflow ejected from the air outlet 111 drives the material to pass through the Y-shaped groove 112, and then It can form a narrow tube effect, so that the materials can fully collide, thereby improving the crushing effect of the materials. The materials are placed in the crushing box 21, and the second motor 24 is started to drive the driving gear 25 to rotate. The driving gear 25 rotates to drive the two transmission gears 26 to rotate. The two transmission gears 26 rotate to drive the rotating tube 22 and the crushing roller 23 to rotate, so that the crushing roller 23 pre-crushes the materials. The crushed materials are screened by the filter 29 and fall into the bottom of the crushing box 21. The rotating box 1 drives the fixed rod 33 to rotate. The rotation of the fixed rod 33 drives the rotating shaft 31 and the first auger blade 32 to rotate. The rotation of the first auger blade 32 can transport the crushed materials into the rotating box 1. The rotating shaft 31 drives the bevel block 34 to rotate. The bevel block 34 is rotated. The rotation of one circle drives the L-shaped rod 35 and the filter screen 29 to move upward once. The movement of the filter screen 29 drives the telescopic rod 28 to extend and retract, and at the same time drives the telescopic spring 210 to stretch and elastically deform. When the bevel block 34 is away from the L-shaped rod 35, the telescopic spring 210 drives the filter screen 29 to reset, thereby driving the filter screen 29 to vibrate, thereby improving the filtering effect of the filter screen 29. The rotation of the drive shaft 14 drives the second auger blade 41 to rotate, so that the larger material on the filter screen 29 enters the fixed cylinder 4 through the discharge channel 43. The rotation of the second auger blade 41 drives the material to move upward, so that the material falls on the crushing roller 23 through the discharge channel 43, thereby being able to perform secondary crushing on the unqualified material. The airflow entering the rotating box 1 passes through the outlet The tube 51 enters the bag dust collector 5 for dust removal, and then enters the cooling box 53 through the L-shaped tube 52 for cooling. Finally, the cooled airflow enters the Y-shaped air inlet pipe 19 through the connecting rod, and is divided by the Y-shaped air inlet pipe 19. One path enters the rotating box 1 to cool the fixed shell 110, and the other path enters the U-shaped tube 27 and the two rotating tubes 22 through the fixed tube 56, so as to cool the crushing roller 23. Then, it is sprayed into the bag dust collector 5 by the jet pipe 59 through the bent tube 57 and the mounting tube 58. The valve of the bent tube 57 is closed, so that the airflow is sprayed into the bag dust collector 5 by the jet pipe 59 through the branch pipe 511, and then the jet pipe 59 performs pulse jet on the dust cloth 510, so that the dust cloth 510 can be cleaned.

[0048] The above description is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An airflow grinding device for sintering NdFeB permanent magnet material, comprising a rotating box (1), characterized in that: The rotating box (1) is rotatably sleeved with a circular frame (11), the circular frame (11) is fixedly connected to a plurality of support legs, the circular frame (11) is fixedly connected to two fixed frames (17), and further comprises: A fixed cover (12), the fixed cover (12) is rotatably connected to the top of the rotating box (1), and the top ends of the two fixing frames (17) are fixedly connected to the fixed cover (12); A powder making mechanism, the powder making mechanism being located on the rotating box (1); The powder making mechanism comprises a powder grinding unit, a pre-crushing unit and a cooling unit. The powder grinding unit comprises a plurality of fixed shells (110) fixedly connected to the inner wall of the rotating box (1). A group of air outlet holes (111) are provided on each of the plurality of fixed shells (110). The rotating box (1) is provided with a plurality of groups of Y-shaped grooves (112). One end of the Y-shaped groove (112) faces the blowing direction of the air outlet holes (111). A Y-shaped air inlet pipe (19) is provided on one side of the circular frame (11). One end of the Y-shaped air inlet pipe (19) is fixedly connected to the circular frame (11). The rotating box (1) is provided with a plurality of fixed shells (110) fixedly connected to the inner wall of the rotating box (1). Four vent holes (113) are provided on the box (1), and the four vent holes (113) are respectively connected to the four fixed shells (110). A first motor (13) is fixedly connected to one of the support legs, and the output end of the first motor (13) is connected to a drive shaft (14) through a coupling. A rotating gear (15) is fixedly sleeved on the drive shaft (14), and a circular rack (16) is fixedly sleeved on the rotating box (1). The rotating gear (15) is meshed with the circular rack (16), and the fixed shell (110) can collide with the material during the rotation process.

2. The airflow grinding device for sintered NdFeB permanent magnet material according to claim 1, characterized in that: The pre-crushing unit comprises a feed pipe (2) fixedly connected to the top of the fixed cover (12), the top of the feed pipe (2) is fixedly connected to a crushing box (21), two rotating pipes (22) are rotatably connected to the crushing box (21), a crushing roller (23) is fixedly sleeved on the two rotating pipes (22), a transmission gear (26) is fixedly sleeved on the two rotating pipes (22), and the two transmission gears (26) are meshed with each other, a second motor (24) is fixedly connected to the crushing box (21), and an output end of the second motor (24) is fixedly connected to a drive gear (25), and the drive gear (25) is meshed with one of the transmission gears (26).

3. The airflow grinding device for sintered NdFeB permanent magnet material according to claim 2, characterized in that: The inner wall of the crushing box (21) is slidably connected to a filter screen (29), the inner wall of the feed pipe (2) is fixedly connected to a bracket (3), the bracket (3) is rotatably connected to a rotating shaft (31), the rotating shaft (31) is fixedly sleeved with a first auger blade (32), the bottom end of the rotating shaft (31) is fixedly connected to a fixing rod (33), and one end of the fixing rod (33) is fixedly connected to the inner wall of the rotating box (1).

4. The airflow grinding device for sintered NdFeB permanent magnet material according to claim 3, characterized in that: Two telescopic rods (28) are fixedly connected to the inner wall of the crushing box (21), and the top ends of the two telescopic rods (28) are fixedly connected to the bottom of the filter screen (29). The top end of the rotating shaft (31) is fixedly connected to a bevel block (34), and the bottom of the filter screen (29) is fixedly connected to an L-shaped rod (35). The bevel block (34) contacts the L-shaped rod (35) when it rotates in a circle.

5. The airflow grinding device for sintered NdFeB permanent magnet material according to claim 4, characterized in that: A telescopic spring (210) is sleeved on each of the two telescopic rods (28), and two ends of the telescopic spring (210) are fixedly connected to the telescopic rod (28) and the filter screen (29), respectively.

6. The airflow grinding device for sintered NdFeB permanent magnet material according to claim 4, characterized in that: The crushing box (21) is fixedly connected to a fixed cylinder (4), and a second auger blade (41) is rotatably connected to the fixed cylinder (4). The top end of the drive shaft (14) is fixedly connected to the bottom end of the second auger blade (41). A feed channel (42) is fixedly connected to the fixed cylinder (4) and the crushing box (21). A discharge channel (43) is fixedly connected to the top end of the fixed cylinder (4), and the discharge channel (43) is located directly above the crushing box (21).

7. The airflow grinding device for sintered NdFeB permanent magnet material according to claim 2, characterized in that: The cooling unit comprises an air outlet pipe (51) fixedly connected to the fixed cover (12), one end of the air outlet pipe (51) is fixedly connected to a bag dust collector (5), a side of the bag dust collector (5) away from the air outlet pipe (51) is fixedly connected to an L-shaped pipe (52), the bottom end of the L-shaped pipe (52) is fixedly connected to a cooling box (53), a pressure pump (54) is fixedly connected to the cooling box (53), the pressure pump (54) and the Y-shaped air inlet pipe (19) are commonly connected to a connecting pipe (55), the other end of the Y-shaped air inlet pipe (19) is fixedly connected to a fixed pipe (56), the top end of the fixed pipe (56) is rotatably connected to one end of one of the rotating pipes (22), one end of the other rotating pipe (22) is rotatably connected to a bending pipe (57), the other ends of the two rotating pipes (22) are commonly rotatably connected to a U-shaped pipe (27), and the U-shaped pipe (27) is fixedly connected to the crushing box (21).

8. The airflow grinding device for sintered NdFeB permanent magnet material according to claim 7, characterized in that: The inner wall of the bag dust collector (5) is fixedly connected with a plurality of dust removal cloths (510), the bag dust collector (5) is fixedly connected with a plurality of jet pipes (59), one end of the plurality of jet pipes (59) is commonly connected with a mounting pipe (58), the bottom end of the bending pipe (57) is fixedly connected with the mounting pipe (58), a valve is installed on the mounting pipe (58), a branch pipe (511) is fixedly connected with the mounting pipe (58), and a pressure valve is installed on the branch pipe (511).

9. The airflow grinding device for sintered NdFeB permanent magnet material according to any one of claims 1 to 8, characterized in that: A discharge pipe (18) is fixedly connected to the top of the fixed cover (12).

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