Neodymium-iron-boron powder adding agent stirring device

Abstract

The utility model relates to the technical field of rare earth permanent magnet neodymium iron boron, in particular to a neodymium iron boron powder additive stirring device. The organic additive adding device comprises a supporting device, a stirring device connected to the supporting device and used for stirring powder, a transmission device used for driving the stirring device to rotate and an additive adding device used for adding organic additives into the stirring device. In the utility model, the organic additive is dispersed on the powder in the stirring barrel through the nozzle by virtue of the additive adding device, so that the surface of each particle is coated with a layer of additive film, when the powder is stirred in the stirring barrel, the powder is driven by the stirring barrel to rotate together, and the powder falls under the action of gravity when moving to the highest point; the effect of fully stirring is achieved.

Description

Technical Field

[0001] This utility model relates to the field of rare earth permanent magnet neodymium iron boron technology, and in particular to a neodymium iron boron powder additive stirring device. Background Technology

[0002] The addition of organic additives is crucial to the performance of sintered NdFeB permanent magnet materials. In general production, the powder and organic additives are repeatedly stirred and contacted in a closed container, so that each particle is coated with a thin film of additives. The effects are as follows:

[0003] (1) Improve powder flowability and reduce interparticle friction, thereby improving orientation degree;

[0004] (2) Prevents powder particles from contacting air, thus playing a role in preventing oxidation;

[0005] (3) Reduce the static magnetic effect between powder particles and prevent the agglomeration of powder particles to achieve high coercivity, high remanence and high energy product.

[0006] The existing NdFeB powder mixing process involves pouring pre-prepared organic additives into the NdFeB powder and using a fixed mixing container to achieve uniform mixing of the NdFeB powder and the organic additive solution. However, since the organic additive solution is poured into the powder all at once, there is localized powder agglomeration, resulting in uneven powder composition and differences in magnetic properties. Summary of the Invention

[0007] To overcome the above shortcomings, the purpose of this utility model is to provide a neodymium iron boron powder additive mixing device, which uses an additive device to disperse organic additives onto the powder in the mixing tank through a nozzle, so that each particle is coated with a thin film of additives. When the powder is mixed in the mixing tank, the mixing tank drives the powder to rotate together. When the powder moves to the highest point, it falls under the action of gravity, achieving the effect of thorough mixing.

[0008] The technical solution of this utility model to solve its technical problem is:

[0009] A neodymium iron boron powder additive mixing device includes a support device, a mixing device for mixing the powder connected to the support device, a transmission device for driving the mixing device to rotate, and an additive device for adding organic additives into the mixing device. The mixing device includes a mixing tank, and a threaded shaft ring is provided on the outer wall of the mixing tank. The transmission device includes a drive motor and a drive shaft, the drive motor being connected to the drive shaft, and a transmission gear being provided on the drive shaft for meshing with the threaded shaft ring. The additive device includes an additive tank, a hose, a control pump, and a nozzle. The control pump is connected to the additive tank, and both ends of the hose are respectively connected to the control pump and the nozzle. The nozzle extends into the feeding port of the mixing tank.

[0010] As an improvement of this utility model, the inner wall of the mixing tank is provided with rotating blades.

[0011] As a further improvement of this utility model, a number of grinding steel balls are placed inside the mixing tank.

[0012] As a further improvement of this utility model, the nozzle is provided with a convex smooth arc around its periphery, and the feeding port is provided with a groove for placing the convex smooth arc.

[0013] As a further improvement of this utility model, the support device includes a support base, a U-shaped groove plate and a triangular support platform. The support base is connected to a U-shaped groove plate on both sides, and the U-shaped groove plates on the left and right sides are respectively connected to a triangular support platform. The transmission device is fixedly connected to the right triangular support platform, and the additive device is fixedly connected to the left triangular support platform.

[0014] As a further improvement of this utility model, the bottom of the support base is provided with several pads.

[0015] As a further improvement of this utility model, two threaded shaft rings are provided on the outer wall of the mixing tank.

[0016] As a further improvement of this utility model, the drive motor is a servo motor.

[0017] In this invention, an additive device disperses organic additives through a nozzle onto the powder in a mixing tank, thereby coating each particle with a thin film of additives. When the powder is stirred in the mixing tank, the mixing tank drives the powder to rotate together. When the powder reaches its highest point, it falls under the action of gravity, achieving a thorough mixing effect. Attached Figure Description

[0018] For ease of explanation, the present invention will be described in detail below with reference to the preferred embodiments and accompanying drawings.

[0019] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0020] Fig. 2 This is a schematic diagram of the internal structure of the mixing tank of this utility model;

[0021] Fig. 3 This is a schematic diagram of the nozzle connection structure of this utility model;

[0022] Reference numerals: 1. Support device; 101. Support base; 102. Gasket; 103. U-shaped groove plate; 104. Triangular support platform; 2. Stirring device; 201. Stirring tank; 202. Threaded shaft ring; 203. Inlet / outlet; 204. Grinding steel ball; 205. Rotating blade; 206. Groove; 3. Additive dosing device; 301. Additive dosing box; 302. Hose; 303. Control pump; 304. Nozzle; 3041. Atomizing hole; 3042. Convex smooth arc; 4. Transmission device; 401. Servo motor; 402. Transmission rod; 403. Transmission gear. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] like Figs. 1 to 3 As shown, the present invention provides a neodymium iron boron powder additive mixing device, which includes a support device 1, a mixing device 2 for mixing powder connected to the support device 1, a transmission device 4 for driving the mixing device 2 to rotate, and an additive device 3 for adding organic additives into the mixing device 2.

[0025] In this utility model, the support mechanism (1) is provided with a support base 101, a U-shaped trough plate 103 and a triangular support platform 104. The stirring device 2 is rotatably connected to the two U-shaped trough plates 103. The triangular support platform 104 is provided on both sides of the U-shaped trough plate 103. The triangular support platform 104 is welded to the U-shaped trough plate 103. The triangular support platform 104 on the right side of the U-shaped trough plate 103 is fixedly connected to the transmission device 4, and the triangular support platform 104 on the left side of the U-shaped trough plate 103 is fixedly connected to the additive device 3.

[0026] In this invention, the lower surface of the support base 101 is provided with four pads 102 that are connected to the ground and are configured to adjust its horizontal height to ensure that this invention works on the same horizontal line.

[0027] In this utility model, the stirring device 2 includes a stirring tank 201. The outer wall of the stirring tank 201 is provided with two sets of symmetrical threaded shaft rings 202. The symmetrical threaded shaft rings 202 are meshed with a transmission gear 403. The transmission gear 403 is connected to the transmission shaft 402. The transmission shaft 402 is connected to the output end of the servo motor 401. The stirring tank 201 contains built-in grinding steel balls 204 and rotating blades 205. The stirring tank 201 is provided with an inlet and outlet port 203. The stirring tank 201 is airtight, and a sealing cover is provided at the inlet and outlet port 203.

[0028] In this utility model, the left end of the central rotating shaft of the mixing tank 201 is provided with a groove 206 for nozzle placement. The inner wall of the groove 206 is smooth and is configured to connect the nozzle 304. The nozzle 304 is provided with multiple sets of atomizing holes 3041. The outer periphery of the nozzle is provided with a convex smooth arc 3042. The convex smooth arc 3042 is placed in the groove 206 for sealing.

[0029] In this invention, the additive device 3 includes an additive box 301, which has a sealed inner cavity containing organic additives. One end of the sealed inner cavity is connected to a hose 302, and the other end of the hose 302 is connected to a control pump 303. The control pump 303 controls the flow rate of the additives. The output end of the control pump 303 is connected to a nozzle 304 through the hose 302. The hose 302 is corrosion resistant.

[0030] In this invention, when in use, neodymium iron boron powder is first loaded into the mixing tank 201, and then high-purity argon gas is introduced. Under the protection of argon gas, the additive is atomized and dispersed into the powder in the mixing tank 201 through the nozzle 304 along the central rotation axis of the mixing tank 201 by the additive device 3, so that each particle is coated with a thin film of additive.

[0031] In this invention, when the mixing tank 201 rotates along the central axis, it can be ensured that the nozzle 304 and the hose 302 connected to the nozzle 304 will not change position as the mixing tank 201 rotates.

[0032] In this invention, when the powder is stirred in the mixing tank 201, the rotating blade 205 inside the mixing tank 201 drives the powder to rotate together. When the powder moves to the highest point, it falls under the action of gravity, thus achieving the effect of thorough stirring.

[0033] In this invention, the built-in grinding steel balls 204 inside the mixing tank 201 grind and modify large particles, thereby improving the uniformity of powder particle size.

[0034] This invention allows for the addition of additives during powder mixing and reversal, enabling the organic additives and NdFeB powder to be mixed evenly. This improves powder flowability and reduces interparticle friction during mixing. Simultaneously, the built-in grinding steel balls in the mixing tank 201 grind and modify large particles, making the powder more uniform.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A neodymium iron boron powder additive mixing device, characterized in that, The device includes a support device and a stirring device connected to the support device for stirring powder, a transmission device for driving the stirring device to rotate, and an additive device for adding organic additives into the stirring device. The stirring device includes a stirring tank with a threaded shaft ring on its outer wall. The transmission device includes a drive motor and a drive shaft, the drive motor being connected to the drive shaft, and a transmission gear on the drive shaft for meshing with the threaded shaft ring. The additive device includes an additive tank, a hose, a control pump, and a nozzle. The control pump is connected to the additive tank, and both ends of the hose are connected to the control pump and the nozzle, respectively. The nozzle extends into the filling port of the stirring tank.

2. The neodymium iron boron powder additive mixing device according to claim 1, characterized in that, Rotating blades are provided on the inner wall of the mixing tank.

3. A neodymium iron boron powder additive mixing device according to claim 1 or 2, characterized in that, The mixing tank contains several grinding steel balls.

4. The neodymium iron boron powder additive mixing device according to claim 1, characterized in that, The nozzle has a convex smooth arc around its periphery, and the feeding port has a groove for placing the convex smooth arc.

5. The neodymium iron boron powder additive mixing device according to claim 1, characterized in that, The support device includes a support base, a U-shaped groove plate, and a triangular support platform. A U-shaped groove plate is connected to each side of the support base. The U-shaped groove plates on the left and right sides are respectively connected to a triangular support platform. The transmission device is fixedly connected to the right triangular support platform, and the additive device is fixedly connected to the left triangular support platform.

6. The neodymium iron boron powder additive mixing device according to claim 5, characterized in that, The bottom of the support base is provided with several pads.

7. The neodymium iron boron powder additive mixing device according to claim 1, characterized in that, Two threaded shafts are provided on the outer wall of the mixing tank.

8. The neodymium iron boron powder additive mixing device according to claim 1, characterized in that, The drive unit is a servo motor.

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