NdFeB magnetic material screening device

Abstract

The utility model relates to the technical field of screening devices, in particular to a neodymium iron boron magnetic material screening device which comprises a fixed base, a screening frame and a top cover, the surface of the fixed base is detachably connected with a bottom box, the screening frame is detachably connected to the top end of the bottom box, and the top cover is detachably connected to the top end of the screening frame. Rotating plate assemblies are installed in an inner cavity of the screening frame and an inner cavity of the bottom box correspondingly, the rotating plate assemblies are used for sweeping neodymium iron boron magnetic materials to be flat, a transmission assembly is installed on the surface of the fixed base and used for driving each rotating plate assembly to rotate, and each rotating plate assembly comprises a rotating shaft, a sweeping plate and a T-shaped ring; the sweeping plate is rotatably connected with the rotating shaft, the sweeping plate is fixedly connected to the inner ring of the T-shaped ring, and the purpose is to solve the problem that after neodymium iron boron magnetic materials enter the mesh screen, the materials are prone to local accumulation.

Description

Technical Field

[0001] This invention relates to the field of screening device technology, specifically to a screening device for neodymium iron boron magnetic materials. Background Technology

[0002] Neodymium iron boron (NdFeB) is a high-performance permanent magnet material. It is mainly composed of neodymium, iron, and boron. Neodymium, a rare earth element, plays a crucial role in the material's magnetism, significantly improving its remanence and coercivity. Iron is the main matrix element, providing the basic magnetic framework, while boron primarily improves the crystal structure and enhances magnetocrystalline anisotropy, thereby increasing the material's magnetism. The processing of NdFeB magnetic materials typically involves multiple steps, such as sintering and molding. Physical properties, such as particle size, significantly impact product performance. For example, excessively large particle size variations and inhomogeneous particles can make it difficult to control sintering temperature and time, as different particle sizes require different sintering conditions for complete densification. This can lead to problems during the sintering process. Therefore, a screening process is included in the production of NdFeB magnetic materials.

[0003] In existing screening devices, after neodymium iron boron magnetic materials enter the screen, local accumulation easily occurs due to gravity, leading to significant differences in screening efficiency in different areas. In some areas, excessive material accumulation may overload the screen, affecting screening accuracy and efficiency. For example, when material enters the screen, it naturally flows downwards under gravity. However, because the feed position is relatively fixed, the material first accumulates in the area directly below the feed inlet. Therefore, local accumulation easily occurs under gravity. When excessive material accumulation overloads the screen in some areas, the screen openings are covered by a large amount of material, reducing the effective screening area. At the same time, excessive material accumulation increases the residence time of the material on the screen, reducing screening efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a screening device for neodymium iron boron magnetic materials to solve the problem that the material tends to accumulate locally after entering the screen.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A sieving device for neodymium iron boron magnetic materials includes a fixed base, a sieving frame, and a top cover. A bottom box is detachably connected to the surface of the fixed base. The sieving frame is detachably connected to the top of the bottom box. The top cover is detachably connected to the top of the sieving frame. Rotating plate assemblies are installed in the inner cavities of both the sieving frame and the bottom box. The rotating plate assemblies are used to level the neodymium iron boron magnetic materials. A transmission assembly is installed on the surface of the fixed base. The transmission assembly is used to drive each rotating plate assembly to rotate.

[0007] Preferably, the rotating plate assembly includes a rotating shaft, a sweeping plate, and a T-shaped ring. The sweeping plate and the rotating shaft are rotatably connected. The sweeping plate is fixedly connected to the inner ring of the T-shaped ring. The inner walls of the bottom box and the screening frame are both provided with annular grooves for the T-shaped ring to rotate.

[0008] Preferably, the transmission assembly includes a motor and a cross shaft. The motor is mounted on the surface of the fixed base, and the output end of the motor is coaxially and fixedly connected to the cross shaft. The bottom box and the screening frame both have round holes for the cross shaft to pass through. The rotating shaft is fitted with a cross hole for the cross shaft to pass through.

[0009] Preferably, the top cover and the bottom of the screening frame are both fixedly connected with threaded rings, and the top of the screening frame and the bottom box are both provided with threaded grooves for threaded connection of the threaded rings.

[0010] Preferably, both sides of the base box are fixedly connected with mating blocks, and the inner surface of the fixed base is provided with mating slots for the mating blocks to be inserted.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The design of the rotating plate assembly effectively solves the problem of material accumulation on the screen. During the screening process, the sweeping plate can sweep away the accumulated neodymium iron boron magnetic material. In this way, the material can be spread out on the screen of the screening frame, which greatly improves the screening efficiency and reduces the situation where the screen holes are covered by a large amount of material due to accumulation, thus reducing the effective screening area. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the overall vertical section of the present invention;

[0015] Figure 3 This is a schematic diagram of the vertical section of the screening frame of the present invention;

[0016] Figure 4 This is a schematic diagram of the vertical section of the bottom box of the present invention;

[0017] Figure 5 This is a schematic diagram of the vertical section of the fixed base of the present invention.

[0018] In the diagram: 1. Fixed base; 2. Connecting slot; 3. Connecting block; 4. Base box; 5. Rotating shaft; 6. Sweeping plate; 7. T-ring; 8. Threaded groove; 9. Threaded ring; 10. Cross hole; 11. Cross shaft; 12. Motor; 13. Screening frame; 14. Top cover. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 5 The present invention provides a technical solution.

[0021] A sieving device for neodymium iron boron magnetic materials includes a fixed base 1, a sieving frame 13, and a top cover 14. A bottom box 4 is detachably connected to the surface of the fixed base 1. The sieving frame 13 is detachably connected to the top of the bottom box 4, and the top cover 14 is detachably connected to the top of the sieving frame 13. Rotating plate assemblies are installed in the inner cavities of both the sieving frame 13 and the bottom box 4. The rotating plate assemblies are used to level the neodymium iron boron magnetic materials and prevent accumulation. A transmission assembly is installed on the surface of the fixed base 1 to drive each rotating plate assembly to rotate.

[0022] The rotating plate assembly includes a rotating shaft 5, a sweeping plate 6, and a T-shaped ring 7. The sweeping plate 6 is rotatably connected to the rotating shaft 5. The sweeping plate 6 is fixedly connected to the inner ring of the T-shaped ring 7. The inner walls of the bottom box 4 and the screening frame 13 are both provided with annular grooves for the T-shaped ring 7 to rotate. The sweeping plate 6 is a certain distance from the bottom wall of the screening frame 13 and the bottom box 4. This distance is the maximum height at which the sweeping plate 6 can smooth out the NdFeB magnetic material accumulation. Those skilled in the art can conventionally select the distance according to actual needs and then carry out corresponding design. The top of the sweeping plate 6 is a pointed top to prevent the NdFeB magnetic material from falling onto the top of the sweeping plate 6 when it falls.

[0023] The transmission assembly includes a motor 12 and a cross shaft 11. The motor 12 is mounted on the surface of the fixed base 1. The output end of the motor 12 is coaxially and fixedly connected to the cross shaft 11. The base box 4 and the screening frame 13 both have round holes through which the cross shaft 11 can move. The rotating shaft 5 is provided with a cross hole 10 for the cross shaft 11 to pass through. The cross shaft 11 passes through the round hole and the cross hole 10 on each rotating shaft 5, so that the cross shaft 11 connects to each rotating shaft 5. By starting the motor 12 to drive the cross shaft 11 to rotate, each rotating shaft 5 can be driven to rotate.

[0024] The top cover 14 and the bottom of the screening frame 13 are both fixedly connected with threaded rings 9. The top of the screening frame 13 and the bottom box 4 are both provided with threaded grooves 8 for threaded connection of the threaded rings 9. Through the threaded connection between the threaded rings 9 and the threaded grooves 8, multiple screening frames 13 can be stacked on the bottom box 4 as needed, and then the top cover 14 is installed on the topmost screening frame 13 to cover it.

[0025] Both sides of the base box 4 are fixedly connected with mating blocks 3, and the inner surface of the fixed base 1 is provided with mating slots 2 for the mating blocks 3 to be inserted, so that the base box 4 and the fixed base 1 can be detached.

[0026] The specific steps of this solution are as follows: First, align the docking block 3 with the docking slot 2, install the base box 4 on the surface of the fixed base 1, determine the number of screening frames 13 to be installed according to the actual screening requirements, thread the threaded ring 9 with the threaded groove 8, and then stack the screening frames 13 on the base box 4 in sequence. During installation, ensure that the cross shaft 11 passes through the cross hole 10, and slowly feed the NdFeB magnetic material to be screened into the topmost screening frame 13. Then, install the top cover 14 on the top of the topmost screening frame 13, start the motor 12, and the motor 12 drives the cross shaft 11 to rotate. Since the cross shaft 11 passes through the cross hole 10 on each rotating shaft 5 during installation, the rotation of the cross shaft 11 will... The rotating shaft 5 rotates, which in turn drives the sweeping plate 6 to rotate. The sweeping plate 6 then drives the T-shaped ring 7 to rotate. As the material falls and falls on the screening frame 13 for screening, the sweeping plate 6 will sweep away the accumulated neodymium iron boron magnetic material during its rotation. According to actual needs, the rotation speed of the rotating plate assembly can be controlled by adjusting the speed of the motor 12, thereby affecting the movement state of the material on the screen and the screening effect. Conventionally, those skilled in the art can choose to place this device on a vibrating platform according to actual needs to increase the screening efficiency. After the screening work is completed, the operation of the motor 12 is stopped, and the top cover 14, screening frame 13 and bottom box 4 are disassembled in sequence. The material inside is then inverted to complete the screening.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sieving device for neodymium iron boron magnetic materials, comprising a fixed base (1), a sieving frame (13), and a top cover (14), characterized in that: The fixed base (1) is detachably connected to the bottom box (4), the screening frame (13) is detachably connected to the top of the bottom box (4), the top cover (14) is detachably connected to the top of the screening frame (13), the screening frame (13) and the bottom box (4) are both equipped with rotating plate assemblies, the rotating plate assemblies are used to smooth the neodymium iron boron magnetic material, and the fixed base (1) is equipped with a transmission assembly, the transmission assembly is used to drive each rotating plate assembly to rotate; The rotating plate assembly includes a rotating shaft (5), a sweeping plate (6) and a T-shaped ring (7). The sweeping plate (6) and the rotating shaft (5) are rotatably connected. The sweeping plate (6) is fixedly connected to the inner ring of the T-shaped ring (7). The inner walls of the bottom box (4) and the screening frame (13) are both provided with annular grooves for the T-shaped ring (7) to rotate. The transmission assembly includes a motor (12) and a cross shaft (11). The motor (12) is mounted on the surface of the fixed base (1). The output end of the motor (12) is coaxially and fixedly connected to the cross shaft (11). The bottom box (4) and the screening frame (13) both have round holes through which the cross shaft (11) can move. The rotating shaft (5) is provided with a cross hole (10) through which the cross shaft (11) can pass. The top cover (14) and the bottom of the screening frame (13) are both fixedly connected with threaded rings (9), and the top of the screening frame (13) and the bottom box (4) are both provided with threaded grooves (8) for threaded connection of the threaded rings (9). Both sides of the bottom box (4) are fixedly connected with docking blocks (3), and the inner surface of the fixed base (1) is provided with docking slots (2) for the docking blocks (3) to be inserted.

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