Neodymium-iron-boron magnet intelligent drying machine and drying method

Abstract

The present application relates to neodymium iron boron magnet drying technical field, especially in kind of neodymium iron boron magnet intelligent drying machine and drying method, a kind of neodymium iron boron magnet intelligent drying machine, including chain conveyor and the drying machine being fixed in the middle part of chain conveyor;The rack left part of chain conveyor is fixed with two front and rear symmetrical installation plates;Two installation plates are respectively fixed with one straight spring;The lower end of two straight springs is commonly fixed with a conical hopper;Several through holes are equally provided on the conical hopper;The conical hopper is fixed with a vibration motor;Several connecting rods are fixed on the chain of chain conveyor one. The lower part of the through hole is set to allow only one neodymium iron boron magnet to pass through each time, and the spacing between adjacent through holes is increased, so that the magnets on the adjacent receiving plates of the chain conveyor are separated from each other and do not contact each other. When the neodymium iron boron magnet moves to the right with the conveyor and passes through the drying machine, each surface can be fully dried.

Description

Technical Field

[0001] This invention relates to the field of neodymium iron boron magnet drying technology, and particularly to an intelligent neodymium iron boron magnet dryer and drying method. Background Technology

[0002] Neodymium iron boron (NdFeB) magnets are widely used in high-tech fields such as wind power generation, new energy vehicles, and variable frequency home appliances due to their excellent magnetic properties. Cleaning is an essential post-processing step in the manufacturing of NdFeB magnets, designed to remove impurities and cutting fluid from their surface. However, the cleaned NdFeB magnets often retain a large amount of moisture. If this moisture is not dried promptly and thoroughly, oxidation and corrosion can easily occur during subsequent storage or use, leading to magnetic property degradation or even failure, severely impacting product reliability and lifespan.

[0003] Currently, common drying methods in industrial production include batch drying in ovens and hot air circulation drying. These traditional methods typically involve piling a large number of NdFeB magnets on a pallet or conveyor belt and then feeding them into the drying equipment. This method has obvious drawbacks: the piled NdFeB magnets are in close contact with each other, and the moisture at the contact points cannot evaporate, easily leaving water stains and causing some areas to be incompletely dried. Summary of the Invention

[0004] In order to overcome the shortcomings of traditional drying methods, such as the inability of moisture to evaporate at close contact points due to the accumulation of neodymium iron boron magnets, the easy leaving of water stains, and incomplete drying, this invention provides an intelligent neodymium iron boron magnet dryer and drying method.

[0005] Technical solution: A neodymium iron boron magnet intelligent dryer includes a chain conveyor and a dryer fixed in the middle of the chain conveyor; it also includes mounting plates; two mounting plates symmetrically arranged front and back are fixed to the left side of the chain conveyor frame; a straight spring is fixed to each of the two mounting plates; a conical bucket is fixed to the lower end of the two straight springs; a number of through holes are equidistantly arranged on the conical bucket; a vibrating motor is fixed to the conical bucket; a number of connecting rods are fixed to the chain of the chain conveyor; a receiving plate is connected to each connecting rod.

[0006] Optionally, the receiving plate has several grooves.

[0007] Optionally, it also includes air ducts; several air ducts run through the right side of the dryer, the air ducts are set at an angle, and the air ducts are used to blow hot air into the hollow part of the neodymium iron boron magnet; every two connecting rods form a group, and the two receiving plates on the two connecting rods in each group are set in a V shape.

[0008] Optionally, the through hole is configured as an inverted cone shape.

[0009] Optionally, it also includes an arc-shaped plate; an arc-shaped plate is fixedly connected between two adjacent sets of connecting rods, and the arc-shaped plate is used to prevent the cylindrical magnet from getting stuck between the two connecting rods.

[0010] Optionally, it also includes a connecting plate slidably connected within the receiving plate; each receiving plate is rotatably connected to a corresponding connecting rod one via a torsion spring; each connecting plate is rotatably connected to a connecting rod two; two connecting blocks arranged symmetrically front and back are rotatably connected between two adjacent connecting plates; and two wedge-shaped blocks arranged symmetrically front and back are fixedly connected to the frame of the chain conveyor.

[0011] Optionally, the lower part of the connecting block is set to be arc-shaped.

[0012] Optionally, it also includes two electric push rods fixed to the right side of the dryer and arranged symmetrically in front and behind; each of the two electric push rods has a push plate fixed to its telescopic end.

[0013] Optionally, a pressure sensor is provided between the telescopic end of each electric actuator and the corresponding push plate.

[0014] A method for drying neodymium iron boron magnets includes the following steps: Step 1: System startup and orderly feeding. Start the chain conveyor and dryer to send the cleaned cylindrical neodymium iron boron magnets into the conical hopper, and start the vibration motor. The equipment vibration causes the magnets to fall one by one and evenly through the through holes onto two adjacent receiving plates arranged in a V shape. Step 2: Automatic alignment and preliminary drying. The falling magnets automatically roll to the bottom on the V-shaped receiving plate, ensuring that their axes are aligned in a straight line and the hollow structures are aligned with each other. Then, the magnets are conveyed into the working area of ​​the dryer for preliminary drying of the outer surface of the magnets. Step 3: Dynamic adjustment and deep directional drying. When the receiving plate assembly carrying the magnet moves to the wedge block position, the connecting block is guided upward by the wedge surface. Then, through the connecting rod 2 and the connecting plate, the receiving plate is pushed to rotate around the axis. After completing a brief flipping action, it quickly resets under the action of the torsion spring. This action effectively corrects any possible skewing of the magnet and ensures that its hollow part always remains aligned. At the same time, the external air pump blows hot air precisely into the hollow part of the aligned magnet through the inclined air duct, achieving direct and efficient deep drying. Step 4: Drying and automatic discharge are completed. The neodymium iron boron magnets, after drying, continue to move to the right with the chain conveyor and eventually fall automatically into the collection box at the lower right, completing the entire drying process.

[0015] The beneficial effects of the present invention are: 1. By setting the lower opening of the through hole to allow only one neodymium iron boron magnet to pass through at a time and increasing the spacing between adjacent through holes, the magnets falling on the adjacent receiving plates on the chain conveyor are separated from each other and do not contact each other. When the neodymium iron boron magnet moves to the right with the conveyor and passes through the dryer, all its surfaces can be fully dried.

[0016] 2. In this invention, two adjacent receiving plates are arranged in a V-shape. All NdFeB magnets falling onto these plates will roll to the bottom, ensuring they are aligned in a straight line in the front-to-back direction. This guarantees the hollow parts of the NdFeB magnets are aligned. An external air pump blows hot air through ducts to the hollow parts of the NdFeB magnets, directly drying them and preventing incomplete drying. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the NdFeB magnet intelligent dryer of the present invention; Figure 2 This is a three-dimensional structural diagram of the mounting plate, straight spring, conical bucket, and vibration motor of the NdFeB magnet intelligent dryer of the present invention. Figure 3 This is a three-dimensional structural diagram of the connecting rod and the arc-shaped plate of the NdFeB magnet intelligent dryer of the present invention; Figure 4 This is a three-dimensional structural diagram of the connecting rod 1, receiving plate, connecting plate, connecting rod 2, connecting block and wedge block of the NdFeB magnet intelligent dryer of the present invention; Figure 5 This is a three-dimensional structural diagram of the electric push rod and push plate of the NdFeB magnet intelligent dryer of the present invention.

[0018] The markings in the attached diagram are: 1-Chain conveyor, 2-Dryer, 3-Mounting plate, 4-Straight spring, 5-Conical bucket, 501-Through hole, 6-Vibration motor, 7-Connecting rod one, 8-Supporting plate, 9-Arc plate, 21-Air duct, 22-Connecting plate, 23-Connecting rod two, 24-Connecting block, 25-Wedge block, 31-Electric push rod, 32-Push plate. Detailed Implementation

[0019] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0020] Example 1: A smart dryer for neodymium iron boron magnets, such as... Figures 1-5 As shown, it includes a chain conveyor 1 and a dryer 2; the dryer 2 is fixedly connected to the middle of the chain conveyor 1; It also includes mounting plate 3, straight spring 4, conical bucket 5, vibrating motor 6, connecting rod 7, and receiving plate 8; two mounting plates 3 are welded to the left side of the frame of the chain conveyor 1, which are arranged symmetrically front and back; a straight spring 4 is fixedly connected to each of the two mounting plates 3; a conical bucket 5 is fixedly connected to the lower end of the two straight springs 4; several through holes 501 are opened at equal intervals on the conical bucket 5; a vibrating motor 6 is fixedly connected to the conical bucket 5; several connecting rods 7 are fixedly connected to the chain of the chain conveyor 1; a receiving plate 8 is connected to each connecting rod 7.

[0021] To facilitate the flow of hot air and thus ensure the drying effect, the receiving plate 8 has several grooves.

[0022] It also includes air ducts 21; several air ducts 21 pass through the right side of the dryer 2, and the air ducts 21 are set at an angle; every two connecting rods 7 form a group, and the two receiving plates 8 on the two connecting rods 7 in each group are set in a V shape.

[0023] To facilitate magnet feeding, the through hole 501 is designed as an inverted cone shape.

[0024] It also includes an arc plate 9; an arc plate 9 is welded together between two adjacent sets of connecting rods 7.

[0025] It also includes a connecting plate 22, a second connecting rod 23, a connecting block 24, and a wedge block 25; each receiving plate 8 is rotatably connected to the corresponding connecting rod 7 via a torsion spring; each receiving plate 8 has a connecting plate 22 slidably connected inside it; each connecting plate 22 has a second connecting rod 23 rotatably connected to it; two adjacent connecting plates 22 are rotatably connected to each other with two connecting blocks 24 arranged symmetrically in front and behind; two wedge blocks 25 arranged symmetrically in front and behind are welded to the frame of the chain conveyor 1.

[0026] To facilitate the sliding of the connecting block 24 on the wedge block 25, the lower part of the connecting block 24 is set to be arc-shaped.

[0027] by Figure 1 Based on the viewing angle, the side where the chain conveyor is labeled 1 is the front side.

[0028] In operation, the chain conveyor 1 is started. Using a front-to-back view as a reference, the chain of the chain conveyor 1 drives the connecting rod 7 and the receiving plate 8 to move clockwise, and the dryer 2 is started. An external conveyor transports the cleaned NdFeB magnets into the conical hopper 5. The vibration motor 6 is started, causing the conical hopper 5 to vibrate. This causes the NdFeB magnets inside the conical hopper 5 to vibrate, allowing them to fall one by one from the through-hole 501 onto two adjacent receiving plates 8. The connecting rod 7 and the receiving plate 8 move clockwise, conveying the NdFeB magnets to the right through the dryer 2. The dryer 2 then processes the NdFeB magnets. The drying process involves several grooves on the receiving plate 8 to facilitate the flow of hot air through the NdFeB magnets, ensuring effective drying. Operators can pre-place a collection box on the lower right side of the chain conveyor 1 to receive the dried NdFeB magnets conveyed by the connecting rod 7 and the receiving plate 8. The lower opening of the through hole 501 is designed to allow only one NdFeB magnet to fall at a time, with sufficient spacing between adjacent through holes 501. This prevents magnets falling onto adjacent receiving plates 8 from contacting each other, ensuring thorough drying of all parts of the magnet as it is conveyed to the right through the dryer 2.

[0029] An arc-shaped plate 9 is welded between two adjacent connecting rods 7. The arc-shaped plate 9 is used to prevent the magnet from getting stuck between the two connecting rods 7, and to avoid the contact area between the cylindrical magnet and the connecting rod 7 being too large, which would affect the drying effect.

[0030] When drying cylindrical NdFeB magnets, the central part of the cylindrical NdFeB magnet has a hollow structure. The hot air from the dryer 2 cannot be directly blown onto the hollow structure of the NdFeB magnet, resulting in incomplete drying. Therefore, two adjacent receiving plates 8 are arranged in a V-shape. In this way, all NdFeB magnets falling onto the two adjacent receiving plates 8 will roll to the bottom, making all NdFeB magnets in a straight line in the front-to-back direction, that is, the hollow structures of the NdFeB magnets are aligned with each other. Several air ducts 21 are inserted through the right side of the dryer 2. The air ducts 21 are set at an angle and are connected to an external air pump. The external air pump blows hot air through the air ducts 21 onto the hollow parts of the NdFeB magnets. The hot air passes through each hollow part of the NdFeB magnet and directly dries the hollow parts of the NdFeB magnets, thereby avoiding the phenomenon of incomplete drying of the hollow parts of the NdFeB magnets.

[0031] Some of the NdFeB magnets that fall between two adjacent receiving plates 8 will exhibit an skewed posture (especially when there are grooves on the receiving plates 8 for hot air circulation, the grooves provide a support point for the magnets, preventing them from rolling to the bottom). This skew will cause the hollow parts of the NdFeB magnets to misalign, and the hot air blown out through the air duct 21 cannot directly blow onto the hollow parts of the NdFeB magnets, resulting in poor drying effect; therefore, a connecting plate 22, a connecting rod 23, a connecting block 24, and a wedge block 25 are provided. When connecting rod 7, receiving plate 8, connecting plate 22, connecting rod 23, and connecting block 24 move to the right, connecting block 24 will contact wedge block 25. Wedge block 25 forces connecting block 24 to move upward. Connecting block 24, through connecting rod 23, drives one end of connecting plate 22 to move upward, causing connecting plate 22 to retract into receiving plate 8. Receiving plate 8 then rotates around connecting rod 7. The torsion spring between connecting rod 7 and receiving plate 8 stores torque, ultimately causing receiving plate 8 and connecting plate 22 to be in a straight state. Figure 4 As shown, the connecting block 24 then moves to separate from the wedge block 25. Under the elastic force of the torsion spring between the connecting rod 1 7 and the receiving plate 8, the receiving plate 8 rotates and resets, thereby causing the connecting block 24 and the connecting rod 23 to drive one end of the connecting plate 22 to move down and reset, so that the two adjacent receiving plates 8 can re-form a V-shape. The above action realizes that the two receiving plates 8 flip upward and then return to their original position, so that the neodymium iron boron magnets are flipped. After the neodymium iron boron magnets are flipped, in the front-back direction, the originally skewed neodymium iron boron magnets will align with the other neodymium iron boron magnets, that is, the hollow parts of the neodymium iron boron magnets will align with each other, thereby ensuring the drying effect.

[0032] Example 2: Based on Example 1, such as Figures 1-5 As shown, it also includes an electric push rod 31 and a push plate 32; two electric push rods 31 are fixedly connected to the right side of the dryer 2 and are arranged symmetrically in front and behind; a push plate 32 is fixedly connected to the telescopic end of each of the two electric push rods 31.

[0033] To prevent the push plate 32 from excessively compressing the neodymium iron boron magnet, a pressure sensor is installed between the telescopic end of each electric push rod 31 and the corresponding push plate 32.

[0034] There is a gap between two adjacent NdFeB magnets. Hot air flowing through the hollow parts of the NdFeB magnets easily diffuses outwards through this gap, resulting in less hot air reaching the hollow parts of the NdFeB magnets farther from the air duct 21, leading to poor drying. Therefore, whenever a row of NdFeB magnets moves between the two push plates 32, the chain conveyor 1 is paused by a controller (e.g., PLC). Then, the two electric push rods 31 are controlled to move the corresponding push plates 32 towards each other. This movement causes the NdFeB magnets in the same row to move closer together, eliminating gaps between adjacent NdFeB magnets. Finally, the two electric push rods 31 are controlled to move the corresponding push plates 32 away from each other to reset. This prevents hot air flowing through the hollow parts of the NdFeB magnets from easily diffusing outwards. The drying process spreads outwards from the gaps to ensure the drying effect on the hollow areas. Then, the chain conveyor 1 continues to transport NdFeB magnets for processing the next row of NdFeB magnets. It should be noted that a pressure sensor is installed between the telescopic end of each electric push rod 31 and the corresponding push plate 32. When the pressure sensor senses an increase in pressure, it indicates that the NdFeB magnets have gathered together. Then, the two electric push rods 31 can be controlled to move the corresponding push plates 32 back to their original positions to avoid excessive compression of the NdFeB magnets by the push plates 32. In addition, before the NdFeB magnets move between the two push plates 32, the outer surface of the NdFeB magnets has been fully dried by the dryer 2. This allows the NdFeB magnets to gather together without affecting the drying of the outer surface of the NdFeB magnets.

[0035] A method for drying neodymium iron boron magnets includes the following steps: Step 1: System startup and orderly feeding. Start the chain conveyor 1 and dryer 2 to send the cleaned cylindrical neodymium iron boron magnets into the conical hopper 5, and start the vibration motor 6. The equipment vibration causes the magnets to fall one by one and evenly through the through hole 501 onto two adjacent receiving plates 8 arranged in a V shape. Step 2: Automatic alignment and preliminary drying. The falling magnets automatically roll to the bottom on the V-shaped receiving plate 8, ensuring that their axes are aligned in a straight line and the hollow structures are aligned with each other. Then, the magnets are conveyed into the working area of ​​the dryer 2 for preliminary drying of the outer surface of the magnets. Step 3: Dynamic adjustment and deep directional drying. When the receiving plate 8 assembly carrying the magnet moves to the position of the wedge block 25, the connecting block 24 is guided upward by the wedge surface, and then pushes the receiving plate 8 to rotate around the axis through the connecting rod 23 and the connecting plate 22. After completing a brief flipping action, it quickly resets under the action of the torsion spring. This action effectively corrects the possible skew of the magnet and ensures that its hollow part always remains aligned. At the same time, the external air pump blows hot air precisely into the hollow interior of the aligned magnet through the inclined air duct 21 to achieve direct and efficient deep drying. Step 4: Complete drying and automatic discharge. The neodymium iron boron magnets, after completing the drying process, continue to move to the right with the chain conveyor 1 and eventually fall automatically into the collection box at the lower right, completing the entire drying process.

[0036] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. A neodymium iron boron magnet intelligent dryer, comprising a chain conveyor (1) and a dryer (2) fixedly connected to the middle of the chain conveyor (1); characterized in that, It also includes mounting plates (3); two mounting plates (3) are fixedly attached to the left side of the frame of the chain conveyor (1) and are arranged symmetrically in front and behind; a straight spring (4) is fixedly attached to each of the two mounting plates (3); a conical bucket (5) is fixedly attached to the lower end of the two straight springs (4); several through holes (501) are provided at equal intervals on the conical bucket (5); a vibrating motor (6) is fixedly attached to the conical bucket (5); several connecting rods (7) are fixedly attached to the chain of the chain conveyor (1); a receiving plate (8) is connected to each connecting rod (7).

2. The NdFeB magnet intelligent dryer according to claim 1, characterized in that, The receiving plate (8) has several grooves.

3. The NdFeB magnet intelligent dryer according to claim 1, characterized in that, It also includes air ducts (21); several air ducts (21) run through the right side of the dryer (2), the air ducts (21) are set at an angle, and the air ducts (21) are used to blow hot air into the hollow part of the neodymium iron boron magnet; every two connecting rods (7) form a group, and the two receiving plates (8) in the same group are set in a V shape.

4. A neodymium iron boron magnet intelligent dryer according to claim 3, characterized in that, The through hole (501) is set to an inverted conical shape.

5. A neodymium iron boron magnet intelligent dryer according to claim 3, characterized in that, It also includes an arc plate (9); an arc plate (9) is fixed between two adjacent sets of connecting rods (7), and the arc plate (9) is used to prevent the cylindrical magnet from getting stuck between the two connecting rods (7).

6. A neodymium iron boron magnet intelligent dryer according to claim 5, characterized in that, It also includes a connecting plate (22) that is slidably connected in the receiving plate (8); each receiving plate (8) is rotatably connected to the corresponding connecting rod one (7) by a torsion spring; a connecting rod two (23) is rotatably connected to each connecting plate (22); two connecting blocks (24) arranged symmetrically in front and behind are rotatably connected between two adjacent connecting plates (22); two wedge blocks (25) arranged symmetrically in front and behind are fixed on the frame of the chain conveyor (1).

7. A neodymium iron boron magnet intelligent dryer according to claim 6, characterized in that, The lower part of the connecting block (24) is set to be arc-shaped.

8. A neodymium iron boron magnet intelligent dryer according to claim 6, characterized in that, It also includes two electric push rods (31) fixed to the right side of the dryer (2) and arranged symmetrically in front and behind; each of the two electric push rods (31) has a push plate (32) fixed to its telescopic end.

9. A neodymium iron boron magnet intelligent dryer according to claim 8, characterized in that, A pressure sensor is provided between the telescopic end of each electric push rod (31) and the corresponding push plate (32).

10. A method for drying neodymium iron boron magnets, characterized in that, This method uses a neodymium iron boron magnet intelligent dryer as described in claim 9, and includes the following steps: Step 1: System startup and orderly feeding. Start the chain conveyor (1) and dryer (2) to send the cleaned cylindrical neodymium iron boron magnets into the conical bucket (5) and start the vibration motor (6). The equipment vibration causes the magnets to fall one by one and evenly through the through hole (501) onto the two adjacent receiving plates (8) set in a V shape. Step 2: Automatic alignment and preliminary drying. The falling magnets automatically roll to the bottom on the V-shaped receiving plate (8), ensuring that their axes are aligned in a straight line and the hollow structures are aligned with each other. Then, the magnets are conveyed into the working area of ​​the dryer (2) for preliminary drying of the outer surface of the magnets. Step 3: Dynamic adjustment and deep directional drying. When the receiving plate (8) assembly carrying the magnet moves to the position of the wedge block (25), the connecting block (24) is guided upward by the wedge surface, and then the receiving plate (8) is pushed to rotate around the axis by the connecting rod (23) and the connecting plate (22). After completing a short flipping action, it quickly resets under the action of the torsion spring. This action effectively corrects the possible deviation of the magnet and ensures that its hollow part is always aligned. At the same time, the external air pump blows hot air through the inclined air duct (21) into the hollow part of the aligned magnet to achieve direct and efficient deep drying. Step 4: Complete drying and automatic discharge. The neodymium iron boron magnets that have completed the drying process continue to move to the right with the chain conveyor (1) and eventually fall into the collection box at the lower right, completing the entire drying process.

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