Neodymium-iron-boron magnetic sintering furnace

Abstract

The utility model provides a kind of neodymium iron boron magnetic sintering furnace, comprising: workbench, workbench upper end is fixedly installed with box, box interior middle part is fixedly installed with baffle, and the bottom of box interior is rotatably connected with carousel.This kind of neodymium iron boron magnetic sintering furnace is provided with sintering cavity, cooling cavity, fixed slide rail, movable guide rail, clamping plate, clamping groove and carousel etc., sintering cavity and cooling cavity are separated design, material can be completed high-temperature sintering and rapid cooling without artificial transfer, avoid scalding risk, fixed slide rail and movable guide rail are accurately embedded by clamping plate, clamping groove, cooperate carousel rotation, flexibly switch material transmission path, ensure that track butt joint is stable, carousel drives movable guide rail to turn, and turning plate opens and closes passage automatically, further simplify process, not only improve production efficiency, reduce energy consumption, but also enhance equipment stability and reliability, provide powerful guarantee for high-quality production of neodymium iron boron magnet.

Description

Technical Field

[0001] This utility model relates to the field of neodymium iron boron strong magnet production technology, and more specifically, to a neodymium iron boron magnetic sintering furnace. Background Technology

[0002] Neodymium iron boron (NdFeB) magnets are permanent magnet materials, primarily composed of NdFeB. They are hard magnetic materials with advantages such as high energy product, high coercivity, and high permeability, and are widely used in motors, generators, maglev trains, wind power generation, audio equipment, and electronic devices. The production process of NdFeB magnets involves mixing NdFeB powder with a binder, then compressing it into a blank of the desired shape using a pressing process. This process requires specific temperature and pressure conditions to ensure effective bonding between the powder particles; therefore, a sintering furnace is necessary to complete these operations.

[0003] However, existing NdFeB magnetic sintering furnaces have the following problems in use:

[0004] In the sintering and cooling process, some equipment requires manual material transfer, which not only increases the risk of contamination, but also easily causes burns to operators due to the high temperature of the sintered blank. In addition, manual labor is inefficient and labor-intensive, and the sudden temperature change during manual material transfer can affect the magnetic properties of the product.

[0005] This invention achieves automated connection between NdFeB sintering and cooling through dual-cavity separation, rotating track, and automatic opening and closing structure, avoiding manual contact with high-temperature materials and reducing the risk of burns. Summary of the Invention

[0006] The present invention aims to solve the technical problems mentioned in the background art and provide a neodymium iron boron magnetic sintering furnace.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a neodymium iron boron magnetic sintering furnace, comprising: a workbench, a box fixedly installed at the upper end of the workbench, a partition fixedly installed in the middle of the box, a turntable rotatably connected to the bottom of the box, the partition dividing the box into two chambers, the left side of the partition being a sintering chamber and the right side being a cooling chamber, the turntable being located inside the sintering chamber, and fixed slide rails fixedly installed inside both the sintering chamber and the cooling chamber, the fixed slide rails in the sintering chamber being longitudinally arranged and segmented, and the fixed slide rails in the cooling chamber being transversely arranged.

[0008] A further preferred embodiment: a bracket is rotatably mounted on the upper end of the worktable, a controller is fixedly mounted on the upper end of the bracket, and a rotating rod is fixedly mounted on the bottom of the bracket, the rotating rod being rotatably connected to the worktable.

[0009] A further preferred embodiment: a fixed end is fixedly installed at both the top and bottom of one side of the front of the box, and a door is rotatably connected between the fixed ends; a fan is fixedly installed at the top of the box.

[0010] A further preferred embodiment: a rotating cavity is provided in the middle of the sintering cavity, and a turntable is rotatably connected inside the rotating cavity.

[0011] A further preferred embodiment: the fixed slide rails in the sintering chamber are located on the front and rear sides of the turntable, and the left end of the fixed slide rails near the turntable is provided with a slot, while the fixed slide rails in the cooling chamber are provided with a slot at the rear end near the turntable.

[0012] A further preferred embodiment: a rotating groove is provided at the bottom of the partition, a rotating plate is rotatably connected in the rotating groove, a rotating rod is fixedly installed on the upper part of the rotating plate, bearings are fixedly installed at both the front and rear ends of the inner wall of the rotating groove, and the rotating rod is rotatably connected to the bearings.

[0013] A further preferred embodiment: the bottom of the rotating plate is provided with a groove, and the groove is movably connected to the upper end of the fixed slide rail in the cooling cavity.

[0014] A further preferred embodiment: a motor is fixedly installed at the bottom of the turntable, the motor is fixedly connected to the inside of the worktable, and movable guide rails are fixedly installed on both the left and right sides of the upper end of the turntable.

[0015] A further preferred embodiment: both ends of the movable guide rail are fixedly equipped with clamping plates, with the front clamping plate located on the left side of the front and the rear clamping plate located on the right side.

[0016] A further preferred embodiment: the card plate is matched with the card slot, and the card plate is embedded inside the card slot. Beneficial effects

[0017] 1. By setting up a sintering chamber and a cooling chamber, the sintering and cooling processes are seamlessly connected through the dual-chamber separation. Materials can be directly transferred through the rotating track and the opening and closing of the partition, eliminating the need for manual handling, avoiding the risk of high-temperature burns, and ensuring the safety of operators. The sintering chamber is independently temperature-controlled to maintain the conditions required for high-temperature sintering and ensure that the NdFeB material is fully densified. The cooling chamber is cooled down quickly through an air-cooling system, shortening the production cycle. The integrated design reduces the equipment's footprint.

[0018] 2. By setting up fixed slide rails, movable guide rails, clamping plates, and clamping slots, the fixed slide rails provide a stable load-bearing foundation, the movable guide rails can change direction as the turntable rotates, and the two are quickly and firmly connected to form a continuous track through the engagement of the clamping plates and clamping slots. This design eliminates the need for complex robotic arms, simplifies the material handling process, and improves transmission efficiency. At the same time, the clamping slots limit the clamping plates, effectively preventing excessive rotation of the guide rails and ensuring the reliability and stability of the track connection.

[0019] 3. With the addition of a rotating plate, when the material moves to the partition with the pallet, the rotating plate automatically swings open the channel under the thrust, allowing the material to pass through smoothly without the need for an additional driving device. After the material has completely entered the cooling chamber, the rotating plate automatically resets itself by its own structure, resealing the gap between the two chambers, effectively preventing heat conduction and air circulation, and maintaining the independence of the high-temperature environment of the sintering chamber and the low-temperature environment of the cooling chamber.

[0020] 4. In summary, this type of NdFeB magnet sintering furnace, with its structure including a sintering chamber, cooling chamber, fixed slide rails, movable guide rails, clamping plates, clamping slots, and a turntable, and a separate design for the sintering and cooling chambers, allows materials to undergo high-temperature sintering and rapid cooling without manual handling, avoiding the risk of burns. The fixed slide rails and movable guide rails are precisely engaged through clamping plates and clamping slots, and in conjunction with the rotation of the turntable, the material transport path can be flexibly switched, ensuring stable track connection. The turntable drives the movable guide rails to rotate, and the turntable automatically opens and closes the channel, further simplifying the process. This not only improves production efficiency and reduces energy consumption but also enhances equipment stability and reliability, providing a strong guarantee for the high-quality production of NdFeB magnets. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the box structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the rotating plate structure of this utility model.

[0024] Figure 4 This is a schematic diagram of the turntable structure of this utility model.

[0025] Figure 5 This is a schematic diagram of the guide rail connection structure of this utility model.

[0026] Figure 1-5 In the middle: 1. Workbench; 101. Support; 102. Controller; 103. Rotating rod one; 2. Box body; 201. Fixed end; 202. Door; 203. Fan; 204. Sintering chamber; 205. Cooling chamber; 206. Rotating chamber; 207. Fixed slide rail; 208. Slot; 3. Partition; 301. Rotating groove; 302. Rotating plate; 303. Rotating rod two; 304. Bearing; 305. Groove; 4. Turntable; 401. Motor; 402. Movable guide rail; 403. Slot plate. Detailed Implementation

[0027] The following will refer to the appendix in the embodiments of this utility model. Figures 1-5 The technical solutions in the embodiments of this utility model will be clearly and completely described.

[0028] Please see Figure 1-5In this embodiment of the present invention, a neodymium iron boron magnetic sintering furnace includes: a workbench 1, a box 2 fixedly mounted on the upper end of the workbench 1, a partition 3 fixedly mounted in the middle of the box 2, a turntable 4 rotatably connected to the bottom of the box 2, the partition 3 dividing the box 2 into two chambers, the left side of the partition 3 being a sintering chamber 204 and the right side being a cooling chamber 205, the turntable 4 being located inside the sintering chamber 204, and fixed slide rails 207 fixedly mounted inside both the sintering chamber 204 and the cooling chamber 205. The fixed slide rails 207 in the sintering chamber 204 are arranged longitudinally and are segmented, while the fixed slide rails 207 in the cooling chamber 205 are arranged laterally. A bracket 101 is rotatably mounted on the upper end of the workbench 1, and a controller 102 is fixedly mounted on the upper end of the bracket 101. A rotating rod 103 is fixedly installed at the bottom of the 01 workbench 1. The rotating rod 103 is rotatably connected to the workbench 1. Fixed ends 201 are fixedly installed at the top and bottom of one side of the front of the housing 2. A door 202 is rotatably connected between the fixed ends 201. A fan 203 is fixedly installed at the top of the housing 2. Movable guide rails 402 are fixedly installed on both the left and right sides of the top of the turntable 4. The turntable 4 is located in the sintering chamber 204 and is used to place the NdFeB material to be sintered. The NdFeB material to be sintered is placed in a tray or trolley. The bottom of the tray or trolley is provided with a sliding groove that is adapted to the fixed slide rail 207 and the movable guide rail 402. First, it slides inward through the fixed slide rail 207 in the sintering chamber 204 to the turntable 4. At this time, the turntable 4 is in the initial position. The movable guide rail 402 is in contact with the fixed slide rail. Connected to 207, door 202 is closed to ensure sealing during sintering and prevent heat loss. Controller 102 activates the heating system, raising the sintering chamber 204 to the set temperature (typically 850℃-1100℃) and maintaining this high temperature for a period to fully densify the NdFeB material. After sintering, turntable 4 rotates clockwise, causing the movable guide rail 402 to slide off the fixed slide rail 207 on the sintering chamber 204. Then, it rotates 90 degrees, connecting the movable guide rail 402 to the fixed slide rail 207 on the cooling chamber 205, forming a continuous track. The material is then output through a cylinder on the left side of the housing 2, pushing a trolley or tray containing the material towards the cooling chamber 205. Once the tray is fully inside the cooling chamber 205... When the door 202 is opened, the fan 203 starts, accelerating the airflow in the cooling chamber 205 and drawing the hot air outward to achieve rapid cooling. After cooling is completed, the cylinder on the right side of the chamber 2 outputs, pushing the material back into the sintering chamber 204 along the transverse fixed slide rail 207. Then, the turntable 4 reverses and resets, re-forming the longitudinal fixed slide rail 207. The material is then pulled outward along the longitudinal fixed slide rail 207 to complete the unloading. In this process, the internal structure of the sintering chamber 204 is made of high-temperature resistant material, and its surface is coated with a high-temperature resistant ceramic coating that can withstand temperatures above 800°C. The cylinder is located inside the inner wall of the chamber 2, with only slots for the output end to be inserted and removed, used to push the trolley or pallet carrying the material to move left and right.

[0029] In this embodiment of the invention, a rotating cavity 206 is provided in the center of the sintering cavity 204. A turntable 4 is rotatably connected inside the rotating cavity 206. Fixed slide rails 207 inside the sintering cavity 204 are located on the front and rear sides of the turntable 4, and slots 208 are provided on the left side of the fixed slide rails 207 near the turntable 4. The fixed slide rails 207 inside the cooling cavity 205 have slots 208 at the rear end near the turntable. A motor 401 is fixedly installed at the bottom of the turntable 4 and is fixedly connected to the inside of the workbench 1. Card plates 403 are fixedly installed at both ends of the movable guide rail 402. The front card plate 403 is located on the left side of the front, and the rear card plate 403 is located on the right. The card plates 403 are matched with the slots 208 and are embedded in the slots 208. Internally, when the turntable 4 is in its initial position, the movable guide rail 402 is connected to the longitudinal fixed slide rail 207, and the clamping plate 403 is embedded in the clamping slot 208 to form a continuous track. After sintering, the motor 401 drives the turntable 4 to rotate, and the clamping plate 403 on the movable guide rail 402 disengages from the clamping slot 208 on the longitudinal fixed slide rail 207, thus separating the movable guide rail 402 from the longitudinal fixed slide rail 207. Then, it rotates 90 degrees clockwise, so that the clamping plate 403 is embedded in the clamping slot 208 on the transverse fixed slide rail 207 to form a transverse continuous track. Since the clamping slot 208 does not penetrate the entire fixed slide rail 207, once it is embedded in place, it will be restricted by the fixed slide rail 207 during rotation, preventing excessive rotation.

[0030] In this embodiment of the utility model, a rotating groove 301 is provided at the bottom of the partition 3, and a rotating plate 302 is rotatably connected inside the rotating groove 301. A rotating rod 303 is fixedly installed on the upper part of the rotating plate 302. Bearings 304 are fixedly installed at both the front and rear ends of the inner wall of the rotating groove 301. The rotating rod 303 is rotatably connected to the bearings 304. A groove 305 is provided at the bottom of the rotating plate 302, and the groove 305 is movably connected to the upper end of the fixed slide rail 207 in the cooling cavity 205. When the cylinder pushes the tray to move laterally along the fixed slide rail 207, it will pass through the rotating plate 302. The rotating plate 302 is affected by the pushing force of the tray moving to one side and swings left and right in the rotating groove 301. The swing direction is the same as the pushing direction. With the rotating plate 302 rotating within the bearing 304, and the width of the groove 305 being slightly larger than the width of the fixed slide rail 207, the rotating plate 302 can smoothly disengage from the fixed slide rail 207 when swinging. As the pallet moves further, the opening angle increases. When the rotating plate 302 gradually forms a 90-degree angle with the partition 3, the opening is at its maximum, and the pallet can smoothly pass through the partition 3 and enter the cooling chamber 205. When the pallet is fully inside the cooling chamber 205, the rotating plate 302 loses the support of the thrust, and the rotating rod 303 rotates downward within the bearing 304 to reset, re-sealing the rotating groove 301. After the material has cooled completely, it moves in the opposite direction along the same path to reset.

[0031] Working principle: When the door 202 is opened, the turntable 4 is in its initial position (longitudinal). The movable guide rail 402 and the longitudinal fixed slide rail 207 in the sintering chamber 204 are connected to the slot 208 via the clamping plate 403 to form a continuous track. The rotating plate 302 at the bottom of the partition 3 is in a closed state, sealing the channel between the sintering chamber 204 and the cooling chamber 205. The tray or trolley containing the NdFeB billet is slid into the sintering chamber 204 through the longitudinal fixed slide rail 207 until it reaches the movable guide rail 402 on the turntable 4. The door 202 is then closed to ensure the sintering chamber is sealed. The controller 102 starts the heating process. The heating system raises the temperature of the sintering chamber 204 to 850℃-1100℃ and maintains it for a set time to achieve densification sintering of the NdFeB material. After sintering, the heating system is turned off, the door 202 of the sintering chamber 204 is opened, and the motor 401 drives the turntable 4 to rotate 90° clockwise, causing the movable guide rail 402 to change from longitudinal to transverse and align with the transverse fixed slide rail 207 in the cooling chamber 205 (the retaining plate 403 is embedded in the retaining groove 208 of the transverse slide rail). At this time, the rotating plate 302 at the bottom of the partition 3 is still in the closed state, and the cylinder on the left side of the sintering chamber 204 (hidden in the inner wall of the chamber) remains closed. The tray is pushed along the movable guide rail 402 to move towards the cooling chamber 205 by the output end. When the tray passes the partition 3, its front end touches the rotating plate 302 and applies a pushing force, causing the rotating plate 302 to swing upwards (up to 90°) around the rotating rod 303 in the rotating groove 301, forming a channel. After the tray is completely in the cooling chamber 205, the rotating plate 302 automatically resets under the action of the bearing 304 due to the loss of pushing force, re-closing the channel, opening the door 202, and starting the fan 203 on the top of the box 2 to accelerate the discharge of hot air in the chamber, achieving rapid cooling. After cooling is completed, the cylinder on the right side of the cooling chamber 205... The pallet is pushed to move in the opposite direction along the transverse fixed slide rail 207, passes through the turntable 302 again, and returns to the movable guide rail 402 on the turntable 4. The motor 401 drives the turntable 4 to rotate 90° counterclockwise. The movable guide rail 402 reconnects with the longitudinal fixed slide rail 207, and the material is pulled out through the longitudinal fixed slide rail 207 to complete the unloading. The components in the sintering chamber 204 (including the turntable 4, movable guide rail 402, and fixed slide rail 207) are coated with a high-temperature resistant ceramic coating, which can withstand temperatures above 800°C. The cylinder adopts an embedded design (only the output end enters and exits through the slot) to avoid the influence of high temperature.

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