Sintering equipment and method for processing sintered neodymium-iron-boron magnetic material

Abstract

The application discloses sintering equipment and a method for sintering neodymium-iron-boron magnetic material processing, and relates to the field of magnetic material sintering equipment, which comprises a sintering furnace body, a rotating clamping piece is arranged at the output end of the motor, a locking unit connected with the first connecting ring is arranged on the side of the supporting rod away from the placing plate, and an air filtering piece is arranged on the side of the supporting rod close to the placing plate. When the second connecting ring is not in contact with the rotating disc, the first clamping ring, the second clamping ring, the anti-skid disc and the anti-skid clamping ring are in a state of adhesion. The adhesion of the first clamping ring, the second clamping ring, the anti-skid disc and the anti-skid clamping ring increases the friction between the second connecting ring and the first connecting ring, thereby preventing the second connecting ring from rotating relative to the first connecting ring, preventing the raw material powder on the top of the placing plate from separating from the placing plate when the sliding block moves along the guide rail or the sliding block separates from the guide rail, and improving the stability of the placing plate.

Description

Technical Field

[0001] This invention relates to the field of magnetic material sintering equipment, specifically a sintering equipment and method for processing NdFeB magnetic materials. Background Technology

[0002] Neodymium iron boron (NdFeB) magnetic materials are tetragonal crystals formed by neodymium, iron, and boron. Sintering is a crucial step in the manufacturing process of magnetic materials. After the powder is pressed into shape in a mold, the metal powder still has a loose structure at the microscopic level. Therefore, sintering is required to crystallize and bond the particles. The powdered raw materials need to be heated to a sufficiently high temperature to allow the atoms to fuse, thereby forming a dense and hard block material.

[0003] During the sintering process, the mold containing the raw material powder needs to be placed in the sintering furnace. At this time, the powder accumulated below the mold is blocked by the mold, resulting in insufficient sintering. Meanwhile, the raw material powder accumulated above the mold is close to the furnace wall, resulting in over-sintering, thus affecting the uniformity of magnetic material sintering. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that uneven heating of magnetic materials affects the sintering effect, and to provide a sintering equipment and method for processing NdFeB magnetic materials.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sintering equipment for processing sintered NdFeB magnetic materials, comprising a sintering furnace body, a connector installed on the top of the sintering furnace body, a furnace cover provided at one end of the sintering furnace body, a motor installed at the end of the sintering furnace body away from the furnace cover, the output end of the motor extending to the inner side of the sintering furnace body, a guide rail installed inside the sintering furnace body, a slider slidably connected to the outer side of the guide rail, a first connecting ring provided at the bottom end of the slider, a second connecting ring rotatably connected to the inner side of the first connecting ring via a bearing, a rotating snap-fit ​​component provided at the output end of the motor, the output end of the motor being connected to the second connecting ring via the rotating snap-fit ​​component, a guide tube provided on the side of the second connecting ring away from the motor, a support rod installed on the outer wall of the guide tube, and the support rod... A rotating shaft is rotatably connected via a bearing. A placement plate is mounted on the end of the rotating shaft away from the first connecting ring. A locking unit connected to the first connecting ring is provided on the side of the support rod away from the placement plate. An air filter is provided on the side of the support rod near the placement plate. The locking unit includes a pressing pin inserted into the inside of a guide tube and extending to the side of the second connecting ring away from the guide tube. A guide groove located on one side of the support rod is opened on the outside of the guide tube. A first retaining ring connected to the pressing pin is slidably connected to the inside of the guide groove. A second retaining ring sleeved on the outside of the rotating shaft is provided on the outside of the first retaining ring. An anti-slip disc is provided on the end of the rotating shaft away from the placement plate. A second telescopic spring connected to the first retaining ring is provided on one side of the support rod. An anti-slip retaining ring is provided on the side of the first connecting ring near the first retaining ring.

[0006] As a further embodiment of the present invention: the horizontal height of the bottom of the placement plate is lower than the horizontal height of the rotating shaft, and the number of the support rods and guide tubes is four, and the four support rods and guide tubes are distributed at equal distances along the center of the second connecting ring.

[0007] As a further embodiment of the present invention: the rotating snap-fit ​​component includes a rotating disk connected to the output end of the motor, a third connecting ring is fixed to the inner side of the second connecting ring, a connecting pin hole penetrating the third connecting ring is opened on one side of the third connecting ring, a connecting pin extending to the other side of the rotating disk is provided on one side of the rotating disk, a limiting plate is installed on the end of the connecting pin away from the third connecting ring, and a first telescopic spring connected to the rotating disk is provided on the side of the limiting plate near the rotating disk.

[0008] As a further embodiment of the present invention: the diameter of the connecting pin is equal to the diameter of the connecting pin hole, and the distances from the center of the connecting pin and the center of the connecting pin hole to the center of the third connecting ring are equal.

[0009] As a further embodiment of the present invention: the center of the rotating disk is coaxial with the center of the second connecting ring, and the outer diameters of the rotating disk and the second connecting ring are equal.

[0010] As a further embodiment of the present invention: the end of the extrusion pin near the rotating disk and the end of the connecting pin near the second connecting ring are both rotatably connected to ball bearings.

[0011] As a further embodiment of the present invention: the filter element includes a side connecting block installed on the side of the support rod away from the second telescopic spring. Guide rods are provided on both sides of the side connecting block. A reciprocating screw is rotatably connected to the side connecting block via a bearing. A second transmission bevel gear is installed at the end of the reciprocating screw near the rotating shaft. A first transmission bevel gear meshing with the second transmission bevel gear is provided on the rotating shaft. A sleeve block located outside the guide rod is sleeved on the outer side of the reciprocating screw. A slanted connecting rod is rotatably connected to the side of the sleeve block away from the guide tube via a rotating shaft. A sleeve is installed on one side of the guide rod. A piston rod extending to the outer side of the sleeve is provided on the inner side of the sleeve. A movable disc is sleeved on the outer side of the sleeve. A connecting rod connected to the piston rod is installed on the side of the movable disc away from the guide rod. A second one-way valve is installed at the end of the sleeve away from the piston rod. A first one-way valve located on the side of the movable disc is installed on the outer wall of the sleeve. A small filter placed side by side with the sleeve is provided at one end of the first one-way valve.

[0012] As a further embodiment of the present invention: the exhaust port of the second one-way valve is connected to the sleeve, and the exhaust port of the first one-way valve is connected to the small filter.

[0013] This invention also discloses a sintering method for processing sintered NdFeB magnetic materials, using the aforementioned sintering equipment for processing sintered NdFeB magnetic materials, comprising the following steps:

[0014] S1: When processing neodymium iron boron magnetic materials, the neodymium iron boron magnetic raw material powder is first poured into the corresponding mold, then the powder in the mold is compacted, and then the mold with the compacted powder is placed on the placement plate.

[0015] S2: Push the slider on the outside of the guide rail to push the placement plate into the sintering furnace. During this process, the locking unit limits the placement plate and the second connecting ring. As the placement plate enters the sintering furnace, the motor and the second connecting ring are connected by rotating the snap-fit. When the motor contacts the second connecting ring, the locking unit loses its limit on the second connecting ring and the placement plate.

[0016] S3: Then close the furnace cover and heat the sintering furnace body. At the same time, start the motor. When the motor is running, it drives the second connecting ring to rotate through the rotating snap fastener, so that the second connecting ring rotates relative to the first connecting ring. At this time, the support rod rotates with the rotation of the first connecting ring, which drives the placement plate to rotate. The placement plate revolves around the center of the first connecting ring. When the placement plate revolves around the center of the first connecting ring, under the influence of the gravity of the placement plate itself and the gravity of the NdFeB magnetic raw material powder mold on the top of the placement plate, the placement plate always remains in a horizontal position. This allows the rotating coupling to rotate relative to the support rod.

[0017] S4: When the rotating coupling rotates relative to the support rod, the air filter operates. The operation of the air filter extracts and filters the odor generated during sintering, thereby improving the internal environment of the sintering furnace and preventing the odor inside the sintering furnace from spreading to the outside when the workers open the sintering furnace.

[0018] S5: After sintering is complete, open the furnace cover, then pull out the slider by pulling the placement plate, and then remove the sintered NdFeB magnetic material.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. By setting a rotating snap-fit ​​component, when the third connecting ring contacts the rotating disk, if the connecting pin hole and the connecting pin are aligned, the connecting pin is inserted into the connecting pin hole. If the connecting pin hole and the connecting pin are not aligned, the connecting pin will be squeezed by the third connecting ring when the slider contacts the rotating disk. The motor is started, and the rotating disk rotates to make the connecting pin rotate to the position aligned with the connecting pin hole. When the connecting pin is aligned with the connecting pin hole, the connecting pin will be inserted into the connecting pin hole under the elastic restoring force of the first telescopic spring. This causes the third connecting ring to drive the second connecting ring to rotate. At the same time, the placement plate is always in a horizontal position, so that the position of the raw material powder placed on the top of the placement plate relative to the sintering furnace body changes, so that the NdFeB magnetic raw material powder in the mold is heated evenly, thereby improving the uniformity of sintering.

[0021] 2. By setting a locking unit, when the second connecting ring is not in contact with the rotating disk, the first retaining ring, the second retaining ring, the anti-slip disk, and the anti-slip retaining ring are in a close fit. The close fit between the first retaining ring, the second retaining ring, the anti-slip disk, and the anti-slip retaining ring increases the friction between the second connecting ring and the first connecting ring, thereby preventing the second connecting ring from rotating relative to the first connecting ring. This also prevents the raw material powder on the top of the placement plate from separating from the placement plate when the slider moves along the guide rail or when the slider separates from the guide rail, thereby improving the stability of the placement plate.

[0022] 3. By setting up a filter element, when the rotating shaft rotates relative to the support rod, the first and second transmission bevel gears drive the reciprocating screw to rotate. At this time, the sleeve block, which is limited by the guide rod, will move along the reciprocating screw, thereby causing the sleeve block to push the movable disc through the inclined connecting rod, so that the piston rod moves relative to the sleeve. When the piston rod moves away from the sleeve, the second one-way valve extracts the odor inside the sintering furnace. When the piston rod moves closer to the sleeve, it injects the air inside the sleeve into the small filter through the first one-way valve and discharges it through the small filter. This allows the small filter to remove the odor that enters the sleeve, thereby improving the environment inside the sintering furnace and preventing the odor generated by the heating of raw materials from spreading everywhere when the sintering furnace is opened by the staff. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a side view of the present invention;

[0025] Figure 3 This is a schematic diagram showing the connection between the motor and the first connecting ring of the present invention;

[0026] Figure 4 This is a schematic diagram showing the connection between the first connecting ring and the support rod of the present invention;

[0027] Figure 5 This is a schematic diagram showing the connection between the second connecting ring and the placement plate of the present invention;

[0028] Figure 6 This is a schematic diagram of the air filter element of the present invention;

[0029] Figure 7 This is a schematic diagram showing the connection between the support rod and the reciprocating lead screw of the present invention;

[0030] Figure 8 This is a schematic diagram of the connection between the first connecting ring and the anti-slip retaining ring of the present invention.

[0031] In the diagram: 1. Sintering furnace body; 2. Furnace cover; 3. Connector; 401. Guide rail; 402. Placement plate; 403. Motor; 404. Rotating disk; 405. First telescopic spring; 406. Limiting plate; 407. Connecting pin; 408. Slider; 409. First connecting ring; 410. Support rod; 411. Rotating coupling; 412. Side connecting block; 413. Connecting pin hole; 414. Anti-slip retaining ring; 415. Second connecting ring; 416. Third connecting ring; 417. First one-way valve; 418. Sleeve; 419. Small filter; 420. Second telescopic spring; 421. Press pin; 422. Anti-slip disc; 423. First transmission bevel gear; 424. Guide tube; 425. First retaining ring; 426. Second retaining ring; 427. Piston rod; 428. Connecting rod; 429. Movable disc; 430. Diagonal connecting rod; 431. Second transmission bevel gear; 432. Guide rod; 433. Sleeve block; 434. Reciprocating screw; 435. Second one-way valve; 436. Guide groove. Detailed Implementation

[0032] 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.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0034] Please see Figures 1 to 8In this embodiment of the invention, a sintering device for processing sintered NdFeB magnetic materials includes a sintering furnace body 1. A connector 3 is installed on the top of the sintering furnace body 1. A furnace cover 2 is provided at one end of the sintering furnace body 1. A motor 403 is installed at the end of the sintering furnace body 1 away from the furnace cover 2. The output end of the motor 403 extends to the inner side of the sintering furnace body 1. A guide rail 401 is installed inside the sintering furnace body 1. A slider 408 is slidably connected to the outer side of the guide rail 401. A first connecting ring 409 is provided at the bottom end of the slider 408. A second connecting ring 415 is rotatably connected to the inner side of the first connecting ring 409 through a bearing. The motor 403... The output end of motor 403 is provided with a rotating snap-fit ​​connector. The output end of motor 403 is connected to the second connecting ring 415 through the rotating snap-fit ​​connector. A guide tube 424 is provided on the side of the second connecting ring 415 away from motor 403. A support rod 410 is installed on the outer wall of the guide tube 424. A rotating shaft 411 is rotatably connected to the support rod 410 through a bearing. A placement plate 402 is installed on the end of the rotating shaft 411 away from the first connecting ring 409. A locking unit connected to the first connecting ring 409 is provided on the side of the support rod 410 away from the placement plate 402. An air filter is provided on the side of the support rod 410 close to the placement plate 402.

[0035] In this embodiment: when processing neodymium iron boron magnetic materials, neodymium iron boron magnetic raw material powder is first poured into a corresponding mold, and then the powder in the mold is compacted. The mold with the compacted powder is then placed on the placement plate 402. Next, the slider 408 is placed on the outside of the guide rail 401 and pushed to push the placement plate 402 into the sintering furnace body 1. During this process, the locking unit limits the placement plate 402 and the second connecting ring 415 to prevent the placement plate 402 from rotating relative to the support rod 410 and the second connecting ring 415 from rotating relative to the first connecting ring 409. 2. Entering the sintering furnace body 1, the motor 403 is connected to the second connecting ring 415 via a rotating snap-fit ​​connector. Once the motor 403 contacts the second connecting ring 415, the locking unit loses its restraint on the second connecting ring 415 and the placement plate 402. Then, the furnace cover 2 is closed, and the sintering furnace body 1 is heated. Simultaneously, the motor 403 is started. When the motor 403 operates, it drives the second connecting ring 415 to rotate via the rotating snap-fit ​​connector, causing the second connecting ring 415 to rotate relative to the first connecting ring 409. At this time, the support rod 410 rotates along with the rotation of the first connecting ring 409, thus... The placement plate 402 is rotated, causing it to revolve around the center of the first connecting ring 409. During this revolving motion, the placement plate 402 remains horizontal due to its own weight and the weight of the NdFeB magnetic raw material powder mold on its top. This allows the rotating shaft 411 to rotate relative to the support rod 410, thereby changing the position of the raw material powder on top of the placement plate 402 relative to the sintering furnace body 1 and preventing the NdFeB magnetic raw material powder from accumulating on top of the mold. The end is always close to the inner wall of the sintering furnace body 1 to avoid over-sintering, and at the same time, it prevents the NdFeB magnetic raw material powder accumulated at the bottom of the mold from being under-sintered. When the rotating coupling 411 rotates relative to the support rod 410, the gas filter operates. The operation of the gas filter extracts and filters the odor generated during sintering, thereby improving the internal environment of the sintering furnace body 1 and preventing the odor inside the sintering furnace body 1 from drifting to the outside when the workers open the sintering furnace body 1. After sintering is completed, the furnace cover 2 is opened, and then the slider 408 is pulled out by pulling the placement plate 402, and then the sintered NdFeB magnetic material is removed.

[0036] Please refer to this carefully. Figure 1 , Figure 3 , Figure 4 , Figure 5 The bottom of the placement plate 402 is at a lower level than the rotating shaft 411. There are four support rods 410 and guide tubes 424, and the four support rods 410 and guide tubes 424 are distributed at equal distances along the center of the second connecting ring 415.

[0037] In this embodiment, by setting this structure, the placement plate 402 is misaligned with the rotating shaft 411, so that the placement plate 402 is always in a horizontal state when rotating along the center of the first connecting ring 409, thereby ensuring the stability of the placement plate 402 and also increasing the amount of NdFeB magnetic material sintered at one time.

[0038] Please refer to this carefully. Figure 1 , Figure 3 The rotating snap-fit ​​component includes a rotating disk 404 connected to the output end of the motor 403. A third connecting ring 416 is fixed to the inner side of the second connecting ring 415. A connecting pin hole 413 is provided on one side of the third connecting ring 416. A connecting pin 407 extending to the other side of the rotating disk 404 is provided on one side of the rotating disk 404. A limiting plate 406 is installed on the end of the connecting pin 407 away from the third connecting ring 416. A first telescopic spring 405 connected to the rotating disk 404 is provided on the side of the limiting plate 406 near the rotating disk 404.

[0039] In this embodiment: when the slider 408 enters the sintering furnace body 1, the movement of the slider 408 causes the third connecting ring 416 to contact the rotating disk 404. If the connecting pin hole 413 and the connecting pin 407 are aligned, the connecting pin 407 is inserted into the connecting pin hole 413 as the slider 408 moves. If the connecting pin hole 413 and the connecting pin 407 are not aligned, the connecting pin 407 will be squeezed by the third connecting ring 416 when the slider 408 contacts the rotating disk 404. At this time, the connecting pin 407 moves away from the rotating disk 404. At the same time, the limiting plate 406 drives the first telescopic spring 405 to extend. Then, the motor 403 is started, causing the motor 403 to drive the rotating disk 404 to rotate. At this time, the connecting pin 407 rotates with the rotation of the rotating disk 404. The rotating disk 404 rotates the connecting pin 407 to the position aligned with the connecting pin hole 413. When the connecting pin 407 is aligned with the connecting pin hole 413, it will be inserted into the connecting pin hole 413 under the elastic restoring force of the first telescopic spring 405. Then, when the motor 403 drives the rotating disk 404 to rotate, the connecting pin 407 will drive the third connecting ring 416 to rotate through the connecting pin hole 413. This will cause the third connecting ring 416 to drive the second connecting ring 415 to rotate, thereby changing the position of the NdFeB magnetic raw material powder placed on the top of the placement plate 402. There is no need to separately operate the rotating disk 404 to connect the slider 408, which reduces the labor intensity of the workers and improves the overall sintering efficiency of the equipment for NdFeB magnetic materials.

[0040] Please refer to this carefully. Figure 3The diameter of the connecting pin 407 is equal to the diameter of the connecting pin hole 413, and the distances from the center of the connecting pin 407, the center of the connecting pin hole 413, and the center of the third connecting ring 416 are equal.

[0041] In this embodiment, this structure is designed to improve the accuracy of the connection between the connecting pin 407 and the connecting pin hole 413. At the same time, after the connecting pin 407 is inserted into the connecting pin hole 413, the rotating disk 404 and the third connecting ring 416 rotate synchronously, thereby ensuring the synchronicity of the rotation of the rotating disk 404 and the second connecting ring 415.

[0042] Please refer to this carefully. Figure 1 , Figure 3 , Figure 4 , Figure 5 The locking unit includes a pressing pin 421 inserted into the inside of the guide tube 424 and extending to the side of the second connecting ring 415 away from the guide tube 424. The outer side of the guide tube 424 is provided with a guide groove 436 located on the side of the support rod 410. The inner side of the guide groove 436 is slidably connected to a first retaining ring 425 connected to the pressing pin 421. The outer side of the first retaining ring 425 is provided with a second retaining ring 426 sleeved on the outer side of the rotating shaft 411. The end of the rotating shaft 411 away from the placement plate 402 is provided with an anti-slip disc 422. The side of the support rod 410 is provided with a second telescopic spring 420 connected to the first retaining ring 425. The side of the first connecting ring 409 near the first retaining ring 425 is provided with an anti-slip retaining ring 414.

[0043] In this embodiment: when the second connecting ring 415 is not in contact with the rotating disk 404, the first retaining ring 425, the second retaining ring 426, the anti-slip disk 422, and the anti-slip retaining ring 414 are in a close-fitting state. The close-fitting of the first retaining ring 425, the second retaining ring 426, the anti-slip disk 422, and the anti-slip retaining ring 414 increases the friction between the second connecting ring 415 and the first connecting ring 409, thereby preventing the second connecting ring 415 from rotating relative to the first connecting ring 409. This prevents the raw material powder on the top of the placement plate 402 from separating from the placement plate 402 when the slider 408 moves along the guide rail 401 or when the slider 408 separates from the guide rail 401, thereby improving the stability of the placement plate 402. When the second connecting ring 415 contacts the rotating disk 404, the pressing pin 421 is limited by the rotating disk 404 and moves relative to the guide tube 424. At this time, the pressing pin 421 drives the first retaining ring 425 and the second retaining ring 426 to move away from the anti-slip retaining ring 414, causing the second telescopic spring 420 to contract, thereby separating the anti-slip retaining ring 414 from the first retaining ring 425 and the second retaining ring 426 from the anti-slip disk 422, thereby releasing the limitation on the second connecting ring 415. When the motor 403 is running, the second connecting ring 415 rotates relative to the first connecting ring 409 under the operation of the rotating retaining member, thereby changing the position of the placement plate 402.

[0044] Please refer to this carefully. Figure 3 , Figure 4 , Figure 5 The center of the rotating disk 404 is coaxial with the center of the second connecting ring 415, and the outer diameters of the rotating disk 404 and the second connecting ring 415 are equal.

[0045] In this embodiment: by setting this structure, when the second connecting ring 415 moves toward the rotating disk 404, the rotating disk 404 obstructs the pressing pin 421, thereby releasing the second connecting ring 415 from the limit.

[0046] Please refer to this carefully. Figure 3 , Figure 4 , Figure 5 , Figure 7 The end of the extrusion pin 421 near the rotating disk 404 and the end of the connecting pin 407 near the second connecting ring 415 are both rotatably connected to ball bearings.

[0047] In this embodiment, this structure is used to reduce the friction between the extrusion pin 421 and the rotating disk 404, and between the connecting pin 407 and the third connecting ring 416, thereby increasing the service life of the extrusion pin 421 and the connecting pin 407.

[0048] Please refer to this carefully. Figure 3 , Figure 4 , Figure 6 , Figure 7 The filter element includes a side connecting block 412 installed on the side of the support rod 410 away from the second telescopic spring 420. Guide rods 432 are provided on both sides of the side connecting block 412. A reciprocating screw 434 is rotatably connected to the side connecting block 412 via bearings. A second transmission bevel gear 431 is installed at the end of the reciprocating screw 434 near the rotating shaft 411. A first transmission bevel gear 423 meshing with the second transmission bevel gear 431 is provided on the rotating shaft 411. A sleeve block 433 located outside the guide rod 432 is sleeved on the outer side of the reciprocating screw 434. The side of the sleeve block 433 away from the guide tube 424 is rotatably connected to a rotating shaft. A sleeve 418 is installed on one side of the inclined connecting rod 430 and the guide rod 432. A piston rod 427 extending to the outside of the sleeve 418 is provided on the inner side of the sleeve 418. A movable disc 429 is sleeved on the outer side of the sleeve 418. A connecting rod 428 connected to the piston rod 427 is installed on the side of the movable disc 429 away from the guide rod 432. A second one-way valve 435 is installed at the end of the sleeve 418 away from the piston rod 427. A first one-way valve 417 located on one side of the movable disc 429 is installed on the outer wall of the sleeve 418. A small filter 419 placed side by side with the sleeve 418 is provided at one end of the first one-way valve 417.

[0049] In this embodiment: when the rotating shaft 411 rotates relative to the support rod 410, the first transmission bevel gear 423 and the second transmission bevel gear 431 drive the reciprocating screw 434 to rotate. At this time, the sleeve block 433, which is limited by the guide rod 432, will move along the reciprocating screw 434, thereby causing the sleeve block 433 to push the movable disk 429 through the inclined connecting rod 430, so that the piston rod 427 moves relative to the sleeve 418. When the piston rod 427 moves away from the sleeve 418, it is activated by the second one-way valve. 435 extracts odors from inside the sintering furnace body 1. When the piston rod 427 moves toward the sleeve 418, it injects air from inside the sleeve 418 into the small filter 419 through the first one-way valve 417 and discharges it through the small filter 419. This allows the small filter 419 to remove odors that have entered the sleeve 418, thereby improving the environment inside the sintering furnace body 1 and preventing odors generated by the heating of raw materials from spreading when the workers open the sintering furnace body 1.

[0050] Please refer to this carefully. Figure 4 , Figure 6 The exhaust port of the second check valve 435 is connected to the sleeve 418, and the exhaust port of the first check valve 417 is connected to the small filter 419.

[0051] In this embodiment: by setting this structure, the gas in the suction sleeve 418 can move in one direction, so that the small filter 419 can filter the gas discharged from the sleeve 418.

[0052] The following describes a sintering method for processing NdFeB magnetic materials, based on the aforementioned sintering equipment, specifically including the following steps:

[0053] S1: When processing neodymium iron boron magnetic materials, the neodymium iron boron magnetic raw material powder is first poured into the corresponding mold, then the powder in the mold is compacted, and then the mold with the compacted powder is placed on the placement plate 402.

[0054] S2: Push the slider 408 onto the outside of the guide rail 401 to push the placement plate 402 into the sintering furnace body 1. During this process, the locking unit limits the placement plate 402 and the second connecting ring 415.

[0055] S3: When the slider 408 enters the furnace body 1 of the sintering furnace, the third connecting ring 416 contacts the rotating disk 404 as the slider 408 moves. If the connecting pin hole 413 is aligned with the connecting pin 407, the connecting pin 407 is inserted into the connecting pin hole 413 as the slider 408 moves. If the connecting pin hole 413 is not aligned with the connecting pin 407, the connecting pin 407 will be squeezed by the third connecting ring 416 when the slider 408 contacts the rotating disk 404. At this time, the connecting pin 407 moves away from the rotating disk 404. At the same time, the limiting plate 406 drives the first telescopic spring 405 to extend. Then the motor 403 is started, so that the motor 403 drives the rotating disk 404 to rotate. At this time, the connecting pin 407 rotates with the rotation of the rotating disk 404.

[0056] S4: The rotating disk 404 rotates the connecting pin 407 to the position aligned with the connecting pin hole 413. When the connecting pin 407 is aligned with the connecting pin hole 413, the connecting pin 407 will be inserted into the connecting pin hole 413 under the elastic restoring force of the first telescopic spring 405. Then, when the motor 403 drives the rotating disk 404 to rotate, the connecting pin 407 will drive the third connecting ring 416 to rotate through the connecting pin hole 413. This will cause the third connecting ring 416 to drive the second connecting ring 415 to rotate, thereby changing the position of the NdFeB magnetic raw material powder placed on the top of the placement plate 402. There is no need to separately operate the rotating disk 404 to connect the slider 408, which reduces the labor intensity of the workers and also improves the overall sintering efficiency of the equipment for NdFeB magnetic materials.

[0057] S5: At this time, the support rod 410 rotates with the rotation of the first connecting ring 409, which drives the placement plate 402 to rotate, so that the placement plate 402 revolves around the center of the first connecting ring 409. When the placement plate 402 revolves around the center of the first connecting ring 409, under the influence of its own weight and the weight of the neodymium iron boron magnetic raw material powder mold on the top of the placement plate 402, the placement plate 402 is always in a horizontal position, so that the rotating shaft 411 rotates relative to the support rod 410.

[0058] S6: When the rotating coupling 411 rotates relative to the support rod 410, it drives the reciprocating screw 434 to rotate via the first transmission bevel gear 423 and the second transmission bevel gear 431. At this time, the sleeve block 433, which is limited by the guide rod 432, will move along the reciprocating screw 434, thereby causing the sleeve block 433 to push the movable disk 429 via the inclined connecting rod 430, so that the piston rod 427 moves relative to the sleeve 418. When the piston rod 427 moves away from the sleeve 418, it passes through the second one-way valve 43. 5. Odors inside the sintering furnace body 1 are extracted. When the piston rod 427 moves towards the sleeve 418, the air inside the sleeve 418 is injected into the small filter 419 through the first one-way valve 417 and discharged through the small filter 419. This allows the small filter 419 to remove odors that have entered the sleeve 418, thereby improving the environment inside the sintering furnace body 1 and preventing odors generated by the heating of raw materials from spreading everywhere when the workers open the sintering furnace body 1.

[0059] S7: After sintering is completed, open the furnace cover 2, then pull out the slider 408 by pulling the placement plate 402, and then remove the sintered NdFeB magnetic material.

[0060] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A sintering apparatus for processing sintered NdFeB magnetic materials, comprising a sintering furnace body (1), characterized in that, A connector (3) is installed on the top of the sintering furnace body (1). A furnace cover (2) is provided at one end of the sintering furnace body (1). A motor (403) is installed at the end of the sintering furnace body (1) away from the furnace cover (2). The output end of the motor (403) extends to the inside of the sintering furnace body (1). A guide rail (401) is installed inside the sintering furnace body (1). A slider (408) is slidably connected to the outside of the guide rail (401). A first connecting ring (409) is provided at the bottom end of the slider (408). The inner side of the first connecting ring (409) is... A second connecting ring (415) is rotatably connected to the first connecting ring (409) via a bearing. A rotating snap-fit ​​is provided at the output end of the motor (403), and the output end of the motor (403) is connected to the second connecting ring (415) via the rotating snap-fit. A guide tube (424) is provided on the side of the second connecting ring (415) away from the motor (403). A support rod (410) is installed on the outer wall of the guide tube (424), and a rotating shaft (411) is rotatably connected to the support rod (410) via a bearing. The rotating shaft (411) is located away from the first connecting ring (409). A placement plate (402) is installed at the end. A locking unit connected to the first connecting ring (409) is provided on the side of the support rod (410) away from the placement plate (402). An air filter is provided on the side of the support rod (410) near the placement plate (402). The locking unit includes a pressing pin (421) inserted into the inside of the guide tube (424) and extending to the side of the second connecting ring (415) away from the guide tube (424). A guide groove (436) located on the side of the support rod (410) is opened on the outside of the guide tube (424). The guide groove (436) is provided on the side of the support rod (410). The inner side of 36) is slidably connected to a first retaining ring (425) connected to a pressing pin (421). The outer side of the first retaining ring (425) is provided with a second retaining ring (426) sleeved on the outer side of the rotating shaft (411). The end of the rotating shaft (411) away from the placement plate (402) is provided with an anti-slip disc (422). The side of the support rod (410) is provided with a second telescopic spring (420) connected to the first retaining ring (425). The side of the first connecting ring (409) close to the first retaining ring (425) is provided with an anti-slip retaining ring (414).

2. The sintering equipment for processing sintered NdFeB magnetic materials according to claim 1, characterized in that, The bottom of the placement plate (402) is at a lower level than the rotating shaft (411). There are four support rods (410) and guide tubes (424), and the four support rods (410) and guide tubes (424) are distributed at equal distances along the center of the second connecting ring (415).

3. The sintering equipment for processing sintered NdFeB magnetic materials according to claim 1, characterized in that, The rotating snap-fit ​​component includes a rotating disk (404) connected to the output end of the motor (403). A third connecting ring (416) is fixed to the inner side of the second connecting ring (415). A connecting pin hole (413) penetrating the third connecting ring (416) is provided on one side of the third connecting ring (416). A connecting pin (407) extending to the other side of the rotating disk (404) is provided on one side of the rotating disk (404). A limiting plate (406) is installed at the end of the connecting pin (407) away from the third connecting ring (416). A first telescopic spring (405) connected to the rotating disk (404) is provided on the side of the limiting plate (406) close to the rotating disk (404).

4. The sintering equipment for processing sintered NdFeB magnetic materials according to claim 3, characterized in that, The diameter of the connecting pin (407) is equal to the diameter of the connecting pin hole (413), and the distances from the center of the connecting pin (407), the center of the connecting pin hole (413), and the center of the third connecting ring (416) are equal.

5. The sintering equipment for processing sintered NdFeB magnetic materials according to claim 3, characterized in that, The center of the rotating disk (404) is coaxial with the center of the second connecting ring (415), and the outer diameters of the rotating disk (404) and the second connecting ring (415) are equal.

6. The sintering equipment for processing sintered NdFeB magnetic materials according to claim 3, characterized in that, The end of the extrusion pin (421) near the rotating disk (404) and the end of the connecting pin (407) near the second connecting ring (415) are both rotatably connected to ball bearings.

7. The sintering equipment for processing sintered NdFeB magnetic materials according to claim 1, characterized in that, The filter element includes a side connecting block (412) mounted on the side of the support rod (410) away from the second telescopic spring (420). Guide rods (432) are provided on both sides of the side connecting block (412). A reciprocating screw (434) is rotatably connected to the side connecting block (412) via bearings. A second transmission bevel gear (431) is mounted on the end of the reciprocating screw (434) near the rotating shaft (411). A first transmission bevel gear (423) meshing with the second transmission bevel gear (431) is provided on the rotating shaft (411). A sleeve block (433) located outside the guide rod (432) is sleeved on the outside of the reciprocating screw (434). A diagonal connecting rod is rotatably connected to the side of the sleeve block (433) away from the guide tube (424) via a rotating shaft. (430) A sleeve (418) is installed on one side of the guide rod (432). A piston rod (427) extending to the outside of the sleeve (418) is provided on the inner side of the sleeve (418). A movable disc (429) is sleeved on the outer side of the sleeve (418). A connecting rod (428) connected to the piston rod (427) is installed on the side of the movable disc (429) away from the guide rod (432). A second one-way valve (435) is installed at the end of the sleeve (418) away from the piston rod (427). A first one-way valve (417) located on one side of the movable disc (429) is installed on the outer wall of the sleeve (418). A small filter (419) placed side by side with the sleeve (418) is provided at one end of the first one-way valve (417).

8. The sintering equipment for processing sintered NdFeB magnetic materials according to claim 7, characterized in that, The exhaust port of the second check valve (435) is connected to the sleeve (418), and the exhaust port of the first check valve (417) is connected to the small filter (419).

9. A sintering method for processing sintered NdFeB magnetic materials, characterized in that, The sintering equipment for processing sintered NdFeB magnetic materials according to any one of claims 1-8 includes the following steps: S1: When processing neodymium iron boron magnetic materials, the neodymium iron boron magnetic raw material powder is first poured into the corresponding mold, and then the powder in the mold is compacted. Then the mold with the compacted powder is placed on the placement plate (402). S2: Push the slider (408) on the outside of the guide rail (401) to push the placement plate (402) into the sintering furnace body (1). During this process, the locking unit limits the placement plate (402) and the second connecting ring (415). As the placement plate (402) enters the sintering furnace body (1), the motor (403) and the second connecting ring (415) are connected by rotating the snap-fit. When the motor (403) contacts the second connecting ring (415), the locking unit loses its limitation on the second connecting ring (415) and the placement plate (402). S3: Then close the furnace cover (2) and heat the furnace body (1) of the sintering furnace. At the same time, start the motor (403). When the motor (403) is running, it drives the second connecting ring (415) to rotate through the rotating snap fastener, so that the second connecting ring (415) rotates relative to the first connecting ring (409). At this time, the support rod (410) rotates with the rotation of the first connecting ring (409), so that the placement plate (402) can be rotated, so that the placement plate (402) revolves around the center of the first connecting ring (409). When the placement plate (402) revolves around the center of the first connecting ring (409), under the influence of the gravity of the placement plate (402) itself and the gravity of the NdFeB magnetic raw material powder mold on the top of the placement plate (402), the placement plate (402) is always in a horizontal position, so that the rotating shaft (411) can rotate relative to the support rod (410). S4: When the rotating coupling (411) rotates relative to the support rod (410), the air filter operates. The air filter extracts and filters the odor generated by sintering, thereby improving the internal environment of the sintering furnace body (1) and preventing the odor inside the sintering furnace body (1) from spreading to the outside when the staff opens the sintering furnace body (1). S5: After sintering is completed, open the furnace cover (2), then pull out the slider (408) by pulling the placement plate (402), and then remove the sintered NdFeB magnetic material.

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