A device for improving the coercivity of sintered NdFeB permanent magnet materials

Abstract

This application relates to a device for improving the coercivity of sintered NdFeB permanent magnet materials, belonging to the technical field of magnetic functional materials. It includes a frame plate; a tank body disposed on the frame plate; a conveying pipe, one end of which passes through the frame plate and the other end of which is inserted into the top opening of the tank body; and a metering assembly, including: a sealed box fixed to the frame plate and connected to the tank body via a connecting pipe; a feeding section disposed within the sealed box for conveying copper chloride powder; a weighing section disposed below the feeding section for quantitatively weighing the required amount of copper chloride powder; an opening and closing section disposed on the feeding section for controlling its opening and closing state; and a discharging assembly disposed within the conveying pipe for quantitatively conveying magnetic powder into the tank body. This application has the effect of improving the coercivity of sintered NdFeB permanent magnet materials.

Description

Technical Field

[0001] This application relates to the technical field of magnetic functional materials, and in particular to a device for improving the coercivity of sintered NdFeB permanent magnet materials. Background Technology

[0002] Neodymium iron boron (Nd-Fe-B) is a representative of third-generation rare-earth permanent magnet materials, and its excellent physical properties have led to its widespread application in various fields such as medical devices, intelligent robots, electronic devices, and industrial motors. With technological advancements, the requirements for magnetic material performance are constantly increasing, especially the demand for its coercivity.

[0003] Currently, the main method to improve coercivity is to directly melt trace elements such as copper and aluminum, which can improve coercivity, together with the main materials (rare metals such as terbium, boron, and pure iron, ferroborone, etc.) in a vacuum rapid solidification furnace to form an alloy for lamination.

[0004] However, due to uneven mixing of materials, most of the trace elements such as copper and aluminum occupy the iron lattice during the chemical reaction, with only a small portion distributed in the boundary phase, which significantly reduces the effect of improving coercivity. Summary of the Invention

[0005] In order to improve the coercivity of sintered NdFeB permanent magnet materials, this application provides a device for improving the coercivity of sintered NdFeB permanent magnet materials.

[0006] This application provides a device for improving the coercivity of sintered NdFeB permanent magnet materials, which adopts the following technical solution:

[0007] A device for improving the coercivity of sintered NdFeB permanent magnet materials, comprising:

[0008] Shelf;

[0009] The tank body is mounted on the frame plate;

[0010] The conveying pipe has one end inserted through the frame plate and the other end inserted into the pipe opening at the top of the tank.

[0011] Quantitative components, including:

[0012] A sealed box is fixed to the frame plate and connected to the tank body via a connecting pipe;

[0013] The feeding section is located inside the enclosed box and is used to transport copper chloride powder;

[0014] A weighing section is located below the feeding section and is used to quantitatively weigh the copper chloride powder required once.

[0015] An opening and closing part is provided on the feeding part and is used to control the opening and closing state of the feeding part;

[0016] The feeding assembly is located inside the conveying pipe and is used to quantitatively convey magnetic powder into the tank.

[0017] By adopting the above technical solution, in the production process, the main alloy needs to be normally spun, hydrogenated, and powdered. Copper chloride powder is directly added to the powder and stirred evenly, and then pressed and sintered.

[0018] During the powder preparation process, the feeding section transports copper chloride powder, and the weighing section weighs the required amount of copper chloride powder in a quantitative manner. After weighing is completed, the opening and closing section closes the feeding section, and the feeding component quantitatively delivers magnetic powder into the tank. The weighed copper chloride powder and magnetic powder are mixed evenly to ensure the accuracy and consistency of each feeding, so that the subsequent sintering can be completed better, thereby making it easier to improve the coercivity of the sintered NdFeB permanent magnet material.

[0019] Optionally, the feeding unit includes:

[0020] The feed pipe has one end inserted into the enclosed box;

[0021] The sealing block has a tapered end that is adapted to the other end of the feed pipe, and the sealing block is slidably connected to the enclosed box.

[0022] The return spring has one end fixedly connected to the end of the sealing block away from the feed pipe, and the other end connected to the opening and closing part.

[0023] By adopting the above technical solution, when copper chloride powder is not fed into the feed pipe, the sealing block abuts against the feed pipe to form a seal under the elastic force of the return spring; when copper chloride powder is fed into the feed pipe, under the action of gravity, the copper chloride powder squeezes the sealing block to move, so that the copper chloride powder can flow out from the gap between the sealing block and the feed pipe.

[0024] After weighing is completed, the sealing block blocks the feed pipe again to prevent copper chloride powder from continuing to flow out, thus achieving quantitative addition of copper chloride powder and improving production efficiency.

[0025] Optionally, the weighing unit includes:

[0026] The weighing box has an open top and one side wall, and is located below the feed pipe;

[0027] A weight sensor is fixed to the bottom of the sealed box and abuts against the weighing box. The weight sensor is used to output the weight signal of the copper chloride powder in the weighing box.

[0028] By adopting the above technical solution, copper chloride powder flows out from the gap between the sealing block and the feed pipe, falls down the inclined surface of the sealing block into the weighing box, and the weight sensor can accurately measure the weight of the copper chloride powder in the weighing box. When the weight reaches the preset value, the system can automatically stop feeding, thereby improving production efficiency.

[0029] Optionally, the opening and closing part:

[0030] The limiting box is fixed to the inner wall of the enclosed box;

[0031] A connecting rod is inserted through the limiting box, and one end is fixedly connected to the end of the sealing block away from the feed pipe;

[0032] The sliding plate is slidably connected inside the limiting box and fixedly connected to the end of the connecting rod away from the sealing block;

[0033] A limiting plate is located below the sliding plate and is slidably connected to the limiting box. The return spring is located between the sliding plate and the limiting plate and is fixedly connected to the sliding plate and the limiting plate respectively. In the initial state, the return spring is in a stretched state.

[0034] An electric telescopic rod is fixed to the inner wall of the enclosed box. The movable end of the electric telescopic rod passes through the bottom end of the limiting box and is fixedly connected to the limiting plate.

[0035] The controller is fixed to the enclosed box, and the electric telescopic rod and the weight sensor are both electrically connected to the controller.

[0036] By adopting the above technical solution, the weight sensor can accurately measure the weight of copper chloride powder in the weighing box and output the weight signal of copper chloride powder in the weighing box to the controller. The controller responds to the weight signal output by the weight sensor and controls the movable end of the electric telescopic rod to move. The movable end of the electric telescopic rod pushes the limit plate to move. The limit plate pushes the slide plate to move through the return spring. The slide plate pushes the connecting rod to move. The connecting rod pushes the sealing block to move, thereby sealing the feed pipe and ensuring the accurate weighing of copper chloride powder.

[0037] Optionally, the feeding assembly includes:

[0038] The material unloading section includes:

[0039] An air pump is mounted on the connecting pipe and electrically connected to the controller;

[0040] An infrared sensor is fixed on the inner wall of the connecting pipe and is used to output the displacement signal of copper chloride powder in the connecting pipe. The infrared sensor is electrically connected to the controller.

[0041] The storage pipe is ring-shaped, fixed to the inner wall of the tank, and connected to the connecting pipe;

[0042] Multiple spray pipes are provided, and the multiple spray pipes are arranged around the axis of the tank. One end of each spray pipe is connected to the storage pipe, and the other end is inclined towards the conveying pipe.

[0043] The fixed plate has multiple feeding ports;

[0044] Multiple sealing plates are provided, each corresponding to a multiple discharge port, and one end of each sealing plate is fixedly connected to the other. The sealing plates are rotatably connected to the fixed plate via a rotating shaft.

[0045] Gear 1 is coaxially fixed on the rotating shaft;

[0046] A drive unit is disposed on the feed pipe and is used to drive the gear to rotate;

[0047] The shock-absorbing part is provided on the conveying pipe and is used to shake the magnetic powder into the tank.

[0048] By adopting the above technical solution, magnetic powder is fed into the pipe through the conveying pipe. When no magnetic powder is fed, the sealing plate blocks the feeding port on the fixed plate.

[0049] After weighing is completed, the controller starts the air pump. The air pump generates negative pressure in the connecting pipe, which draws all the copper chloride powder in the sealed box into the storage pipe and sprays it out through the spray pipe.

[0050] Meanwhile, the infrared sensor monitors in real time whether copper chloride powder is being fed into the connecting pipe. The infrared sensor outputs a displacement signal to the controller, which then controls the drive unit to start. The drive unit drives gear one to rotate, which in turn drives the sealing plate to rotate. The sealing plate opens the feed port, and the magnetic powder falls from the feed port into the tank. During the falling process, the shock unit strikes the wall of the conveying pipe, causing all the magnetic powder to fall off.

[0051] At this time, the copper chloride powder pumped by the air pump and the falling magnetic powder enter the tank at the same time. The copper chloride powder and the falling magnetic powder collide and are initially mixed evenly, so that the subsequent sintering can be completed better, thereby making it easier to improve the coercivity of the sintered NdFeB permanent magnet material.

[0052] Optionally, the drive unit includes:

[0053] The second electric telescopic rod is fixed to the conveying pipe and electrically connected to the controller;

[0054] The first spur rack is coaxially fixed to the movable end of the second electric telescopic rod and meshes with the first gear.

[0055] By adopting the above technical solution, the controller controls the movement of the movable end of the electric telescopic rod II, the movable end of the electric telescopic rod II drives the straight rack I to move, and the straight rack I drives the gear I to rotate, thereby helping to achieve precise feeding of magnetic powder.

[0056] Optionally, the shock-absorbing part includes:

[0057] The vibration box is fixed on the inner wall of the conveying pipe;

[0058] A rotating rod, one end of which passes through the shock box and is rotatably connected to the shock box;

[0059] Gear 2 is coaxially fixed to one end of the rotating rod and meshes with the spur rack 1;

[0060] An incomplete gear is coaxially fixed to the other end of the rotating rod and is located inside the shock box;

[0061] The second spur rack meshes with the incomplete gear and is slidably connected to the shock box via a limiting plate;

[0062] The compression spring is fixed at both ends to the inner wall of the shock chamber and the rack respectively. In the initial state, the compression spring is in a compressed state.

[0063] The shock hammer is fixed to the end of the rack and pinion away from the compression spring.

[0064] By adopting the above technical solution, when no magnetic powder is added, the sealing plate blocks the feeding port on the fixed plate. At this time, the incomplete gear and the spur rack mesh, and the compression spring is in a compressed state, accumulating elastic force.

[0065] The rack drives the gear to rotate, the gear drives the rotating rod to rotate, the rotating rod drives the incomplete gear to rotate, the toothed part of the incomplete gear rotates away from the rack, and under the elastic force of the compression spring, the rack drives the vibrating hammer to move. The vibrating hammer strikes the inner wall of the conveying pipe, thus making the magnetic powder fall more easily.

[0066] Optionally, a fixing assembly is provided between the tank and the conveying pipe, the fixing assembly including:

[0067] A retaining ring is fixedly sleeved on the conveying pipe;

[0068] A limiting ring is fixedly sleeved on the top opening of the tank body and has a retaining groove, which can be engaged in the retaining ring.

[0069] By adopting the above technical solution, a stable connection between the conveying pipe and the tank is achieved by using a retaining ring to engage with the groove of the limiting ring. This prevents the conveying pipe from shaking or falling off during use, thus ensuring the stable operation of the equipment.

[0070] Optionally, the drive unit is provided in two sets, with the two sets of drive units located on both sides of the gear one.

[0071] By adopting the above technical solution, the two sets of drive units work simultaneously, which can significantly enhance the driving force on gear one, thereby improving the torque output of the entire transmission system.

[0072] In summary, this application includes at least one of the following beneficial technical effects:

[0073] By setting up a closed box, feeding section, weighing section and opening and closing section, the weighed copper chloride powder and magnetic powder can be mixed evenly, ensuring the accuracy and consistency of each feeding, so that the subsequent sintering can be completed better, thereby making it easier to improve the coercivity of sintered NdFeB permanent magnet materials.

[0074] By setting up a feeding section, a driving section, and a vibration section, the magnetic powder can fall easily, thus making it easy to accurately control the amount of magnetic powder added.

[0075] By setting retaining rings and limiting rings, a stable connection between the conveying pipe and the tank is achieved, which can prevent the conveying pipe from shaking or falling off during use, thus easily ensuring the stable operation of the equipment. Attached Figure Description

[0076] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0077] Figure 2 This is a cross-sectional view of the quantitative component in an embodiment of this application;

[0078] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0079] Figure 4 yes Figure 2 A magnified view of point B in the middle.

[0080] Explanation of reference numerals in the attached figures:

[0081] 1. Frame plate; 11. Support leg; 2. Tank body; 21. Connecting pipe; 3. Conveying pipe; 4. Fixing component; 41. Snap ring; 42. Limiting ring; 421. Snap groove; 5. Quantitative component; 51. Sealing box; 52. Feeding section; 521. Feed pipe; 522. Sealing block; 523. Return spring; 53. Opening and closing section; 531. Limiting box; 532. Connecting rod; 533. Slide plate; 534. Limiting plate; 535. Electric telescopic rod one; 536. Controller; 54. Weighing section; 541. Weighing box; 542. Weight sensor; 6. Feeding assembly; 61. Feeding section; 611. Air pump; 612. Infrared sensor; 613. Storage pipe; 614. Spraying pipe; 615. Fixing plate; 616. Sealing plate; 617. Gear 1; 62. Drive unit; 621. Electric telescopic rod 2; 622. Spur rack 1; 63. Vibration unit; 631. Vibration box; 632. Rotating rod; 633. Gear 2; 634. Incomplete gear; 635. Spur rack 2; 636. Compression spring; 637. Vibration hammer. Detailed Implementation

[0082] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0083] This application discloses a device for improving the coercivity of sintered NdFeB permanent magnet materials. (Refer to...) Figure 1 and Figure 2 A device for improving the coercivity of sintered NdFeB permanent magnet materials includes a frame plate 1, a tank 2, a conveying pipe 3, a fixing component 4, a metering component 5, and a discharging component 6. The tank 2 is set on the ground. One end of the conveying pipe 3 passes through the frame plate 1, and the other end is inserted into the top opening of the tank 2. The two ends of the fixing component 4 are respectively connected to the conveying pipe 3 and the top opening of the tank 2. The fixing component 4 is used to increase the connection stability between the conveying pipe 3 and the tank 2. The metering component 5 is set on the tank 2 and is used to quantitatively weigh the copper chloride powder required once. The discharging component 6 is set inside the conveying pipe 3 and is used to quantitatively transport the magnetic powder into the tank 2.

[0084] In use, when sintering NdFeB permanent magnet materials, the main alloy is first subjected to normal spinning, hydrogen crushing, and powdering. The fixing component 4 increases the connection stability between the conveying pipe 3 and the tank 2. Copper chloride powder is directly added to the powder and stirred evenly, and then pressed and sintered. During the powdering process, the quantitative component 5 weighs the required amount of copper chloride powder once, and the feeding component 6 quantitatively conveys the magnetic powder into the tank 2. The weighed copper chloride powder and magnetic powder are mixed evenly to ensure the accuracy and consistency of each feeding, so that the subsequent sintering can be completed better, thereby making it easier to improve the coercivity of the sintered NdFeB permanent magnet material.

[0085] Reference Figure 1 and Figure 2The support plate 1 is rectangular and horizontally positioned, with support legs 11 fixed at the four vertices of its bottom. The tank body 2 is vertically positioned, with both its top and bottom narrowed. The conveying pipe 3 is vertically positioned and is divided into pipe A and pipe B along the vertically downward direction. Pipe A is rectangular, and pipe B is circular. Pipe A narrows towards pipe B.

[0086] Reference Figure 2 The fixing component 4 includes a retaining ring 41 and a limiting ring 42. The retaining ring 41 is circular and is fixedly sleeved on the B pipe of the conveying pipe 3. The limiting ring 42 is annular and is fixedly sleeved on the top opening of the tank body 2. The limiting ring 42 has a retaining groove 421, and the retaining ring 41 can be engaged in the retaining groove 421.

[0087] Reference Figure 2 The quantitative component 5 includes a closed box 51, a feeding section 52, an opening and closing section 53, and a weighing section 54. The closed box 51 is rectangular and vertically arranged. The closed box 51 is fixed on the bottom of the frame plate 1 and is connected to the tank 2 through a connecting pipe 21.

[0088] Reference Figure 1 The feeding section 52 includes a feeding pipe 521, a sealing block 522 and a reset spring 523. The feeding pipe 521 is rectangular and vertically arranged. The top end of the feeding pipe 521 is bent in the direction away from the vertical axis of the closed box 51 in the vertical upward direction and passes through the frame plate 1.

[0089] The sealing block 522 is rectangular and vertically positioned. The top of the sealing block 522 is conical and abuts against the bottom of the feed pipe 521. The top of the sealing block 522 is adapted to the bottom of the feed pipe 521. One end of the return spring 523 is fixedly connected to the end of the sealing block 522 away from the feed pipe 521, and the other end is connected to the opening and closing part 53.

[0090] Reference Figure 2 The opening and closing part 53 includes a limiting box 531, a connecting rod 532, a sliding plate 533, and a limiting plate 534. The limiting box 531 is rectangular and vertically arranged, and is fixed to the inner wall of the closed box 51. The connecting rod 532 passes through the top of the limiting box 531, and one end of the connecting rod 532 is fixedly connected to the end of the sealing block 522 away from the feed pipe 521.

[0091] Reference Figure 2The sliding plate 533 is rectangular and horizontally positioned. It is slidably connected to the limiting box 531 in a vertical direction. The sliding plate 533 is fixedly connected to the end of the connecting rod 532 away from the blocking block 522. The limiting plate 534 is rectangular and horizontally positioned. It is located below the sliding plate 533 and slidably connected to the limiting box 531 in a vertical direction. The return spring 523 is located between the sliding plate 533 and the limiting plate 534 and is fixedly connected to both. In the initial state, the return spring 523 is in a stretched state.

[0092] Reference Figure 2 The electric telescopic rod 535 is vertically installed and fixed to the inner wall of the enclosed box 51. The movable end of the electric telescopic rod 535 passes through the bottom end of the limiting box 531 and is fixedly connected to the limiting plate 534. The controller 536 is fixed to the enclosed box 51, and both the electric telescopic rod 535 and the weight sensor 542 are electrically connected to the controller 536.

[0093] Reference Figure 2 The weighing unit 54 includes a weighing box 541 and a weight sensor 542. The weighing box 541 is rectangular and horizontally positioned. The top of the weighing box 541 and the side wall near the tank 2 are open. The weighing box 541 is located below the feed pipe 521. The weight sensor 542 is fixed to the bottom of the enclosed box 51, located below and in contact with the weighing box 541. The weight sensor 542 is used to output the weight signal of the copper chloride powder inside the weighing box 541.

[0094] When in use, when no copper chloride powder is fed into the feed pipe 521, the sealing block 522 abuts against the feed pipe 521 to form a seal under the elastic force of the return spring 523; when copper chloride powder is fed into the feed pipe 521, the copper chloride powder gradually falls down along the inclined side, and under the action of gravity, the copper chloride powder squeezes the sealing block 522 to move downward, so that the copper chloride powder can flow out from the gap between the sealing block 522 and the feed pipe 521;

[0095] Copper chloride powder flows out from the gap between the sealing block 522 and the feed pipe 521, falls down the inclined surface of the sealing block 522 into the weighing box 541, and the weight sensor 542 measures the weight of the copper chloride powder in the weighing box 541 and outputs the weight signal to the controller 536.

[0096] When the weighing reaches the preset value, the controller 536 controls the movable end of the electric telescopic rod 535 to extend. The movable end of the electric telescopic rod 535 pushes the limit plate 534 to move upward. The limit plate 534 pushes the slide plate 533 to move through the reset spring 523. The slide plate 533 pushes the connecting rod 532 to move. The connecting rod 532 pushes the sealing block 522 to move, sealing the feed pipe 521 again to prevent the copper chloride powder from continuing to flow out, thereby ensuring the accurate weighing of the copper chloride powder.

[0097] Reference Figure 2 and Figure 3 The feeding assembly 6 includes a feeding section 61, a driving section 62, and a vibration section 63. The feeding section 61 includes an air pump 611, an infrared sensor 612, a storage pipe 613, a spray pipe 614, a fixing plate 615, a sealing plate 616, and a gear 617. The air pump 611 is mounted on the connecting pipe 21 and is electrically connected to the controller 536.

[0098] Reference Figure 2 Infrared sensor 612 is fixed on the inner wall of connecting pipe 21 and is used to output the displacement signal of copper chloride powder in connecting pipe 21. Infrared sensor 612 is electrically connected to controller 536. Storage pipe 613 is annular and fixed on the inner wall of tank 2. Storage pipe 613 is connected to connecting pipe 21.

[0099] Reference Figure 2 Multiple spray pipes 614 are provided, and the multiple spray pipes 614 are evenly arranged around the axis of the tank body 2. The spray pipes 614 are set vertically, the bottom end of the spray pipe 614 is connected to the storage pipe 613, and the top end is set inclined towards the conveying pipe 3.

[0100] Reference Figure 3 The fixing plate 615 is rectangular and horizontally positioned. Multiple discharge ports are evenly distributed around the vertical axis of the fixing plate 615. Multiple closing plates 616 are provided, each corresponding to one of the discharge ports. One end of each closing plate 616 is fixedly connected to the others, and the closing plates 616 are rotatably connected to the bottom end of the fixing plate 615 via a rotating shaft. A gear 617 is coaxially fixed to the rotating shaft.

[0101] Reference Figure 3 Two sets of drive units 62 are provided, located on either side of gear 617. Each drive unit 62 includes a second electric telescopic rod 621 and a rack 622. The second electric telescopic rod 621 is horizontally positioned and fixed to the inner wall of the conveying pipe 3, and is electrically connected to the controller 536. The rack 622 is coaxially fixed to the movable end of the second electric telescopic rod 621 and meshes with gear 617.

[0102] Reference Figure 3and Figure 4 Two sets of vibration units 63 are provided, each corresponding to one of the two sets of drive units 62. Each vibration unit 63 includes a vibration box 631, a rotating rod 632, a second gear 633, an incomplete gear 634, a second rack 635, and a compression spring 636. The vibration box 631 is fixed to the inner wall of pipe B of the conveying pipe 3. The rotating rod 632 is vertically arranged, and its top end passes through the vibration box 631 and is rotatably connected to it.

[0103] Gear 2 633 is coaxially fixed to the top end of rotating rod 632 and meshes with rack 1 622. Incomplete gear 634 is coaxially fixed to the other end of rotating rod 632 and is located inside shock box 631. Rack 2 635 meshes with incomplete gear 634 and is slidably connected to shock box 631 through limiting plate.

[0104] Reference Figure 4 The two ends of the compression spring 636 are fixedly connected to the inner wall of the shock box 631 and the rack 635, respectively. In the initial state, the compression spring 636 is in a compressed state. The shock hammer 637 is fixed on the end of the rack 635 away from the compression spring 636.

[0105] When in use, after weighing is completed, the controller 536 controls the air pump 611 to start. The air pump 611 draws all the copper chloride powder in the sealed box 51 into the storage pipe 613 and sprays it out through the spray pipe 614.

[0106] Meanwhile, the infrared sensor 612 monitors in real time whether copper chloride powder is being fed into the connecting pipe 21. The infrared sensor 612 outputs a displacement signal to the controller 536. The controller 536 controls the movable end of the electric telescopic rod 621 to move. The movable end of the electric telescopic rod 621 drives the rack 622 to move. The rack 622 drives the gear 617 to rotate. The gear 617 drives the closing plate 616 to rotate. The closing plate 616 opens the discharge port, and the magnetic powder falls from the discharge port into the tank 2.

[0107] During the descent, rack 622 drives gear 633 to rotate, gear 633 drives rotating rod 632 to rotate, rotating rod 632 drives incomplete gear 634 to rotate, the toothed part of incomplete gear 634 rotates away from rack 635, and under the elastic force of compression spring 636, rack 635 drives vibrating hammer 637 to move, vibrating hammer 637 strikes the inner wall of conveying pipe 3, thus making the magnetic powder fall more easily;

[0108] The copper chloride powder pumped by the air pump 611 enters the tank 2 simultaneously with the falling magnetic powder. The copper chloride powder and the falling magnetic powder collide and are initially mixed evenly, which makes the subsequent sintering better and thus makes it easier to improve the coercivity of the sintered NdFeB permanent magnet material.

[0109] The implementation principle of the device for improving the coercivity of sintered NdFeB permanent magnet materials in this application embodiment is as follows: During the powder preparation process, copper chloride powder gradually falls along the inclined side, and the copper chloride powder squeezes the sealing block 522 to move downward, so that the copper chloride powder can flow out from the gap between the sealing block 522 and the feed pipe 521.

[0110] Copper chloride powder flows out from the gap between the sealing block 522 and the feed pipe 521, falls down the inclined surface of the sealing block 522 into the weighing box 541, and the weight sensor 542 measures the weight of the copper chloride powder in the weighing box 541 and outputs the weight signal to the controller 536.

[0111] When the weighing reaches the preset value, the controller 536 controls the movable end of the electric telescopic rod 535 to extend, and the electric telescopic rod 535 pushes the sealing block 522 to move, sealing the feed pipe 521 again to prevent the copper chloride powder from continuing to flow out, thus ensuring the accurate weighing of the copper chloride powder.

[0112] After weighing is completed, the controller 536 controls the air pump 611 to start. The air pump 611 pumps all the copper chloride powder in the sealed box 51 into the storage pipe 613 and sprays it out through the spray pipe 614.

[0113] Meanwhile, the infrared sensor 612 monitors in real time whether copper chloride powder is being fed into the connecting pipe 21. The controller 536 controls the movable end of the electric telescopic rod 621 to move the rack 622. The rack 622 drives the gear 617 to rotate. The gear 617 drives the closing plate 616 to rotate. The closing plate 616 opens the discharge port, and the magnetic powder falls from the discharge port into the tank 2.

[0114] During the descent, rack 622 drives gear 633 to rotate, gear 633 drives rotating rod 632 to rotate, rotating rod 632 drives incomplete gear 634 to rotate, the toothed part of incomplete gear 634 rotates away from rack 635, and under the elastic force of compression spring 636, rack 635 drives vibrating hammer 637 to move, vibrating hammer 637 strikes the inner wall of conveying pipe 3, thus making the magnetic powder fall more easily;

[0115] The copper chloride powder pumped by the air pump 611 enters the tank 2 simultaneously with the falling magnetic powder. The copper chloride powder and the falling magnetic powder collide and are initially mixed evenly, which makes the subsequent sintering better and thus makes it easier to improve the coercivity of the sintered NdFeB permanent magnet material.

[0116] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for improving the coercivity of sintered NdFeB permanent magnet materials, characterized in that, include: Shelf (1); The tank body (2) is mounted on the frame plate (1); The material conveying pipe (3) has one end inserted through the frame plate (1) and the other end inserted into the top opening of the tank body (2); The quantitative component (5) includes: The enclosed box (51) is fixed on the frame plate (1) and is connected to the tank body (2) through the connecting pipe (21); The feeding section (52) is located inside the enclosed box (51) and is used to transport copper chloride powder; Weighing section (54) is located below feeding section (52) and is used to quantitatively weigh the copper chloride powder required once; An opening and closing part (53) is provided on the feeding part (52) and is used to control the opening and closing state of the feeding part (52); The feeding assembly (6) is installed inside the conveying pipe (3) and is used to quantitatively convey magnetic powder into the tank (2); The feeding section (52) includes: The feed pipe (521) has one end inserted into the closed box (51); The sealing block (522) has a tapered end that is adapted to the other end of the feed pipe (521), and the sealing block (522) is slidably connected to the closed box (51); The reset spring (523) is fixed at one end to the end of the sealing block (522) away from the feed pipe (521), and the other end is connected to the opening and closing part (53); The weighing unit (54) includes: The weighing box (541) has an open top and one side wall, and the weighing box (541) is located below the feed pipe (521); A weight sensor (542) is fixed on the bottom of the closed box (51) and abuts against the weighing box (541). The weight sensor (542) is used to output the weight signal of the copper chloride powder in the weighing box (541). The opening and closing part (53) includes: The limiting box (531) is fixed on the inner wall of the closed box (51); A connecting rod (532) is inserted through the limiting box (531), and one end is fixedly connected to the end of the sealing block (522) away from the feed pipe (521); The sliding plate (533) is slidably connected inside the limiting box (531) and fixedly connected to the end of the connecting rod (532) away from the sealing block (522); The limiting plate (534) is located below the sliding plate (533) and is slidably connected to the limiting box (531). The reset spring (523) is located between the sliding plate (533) and the limiting plate (534) and is fixedly connected to the sliding plate (533) and the limiting plate (534) respectively. In the initial state, the reset spring (523) is in a stretched state. An electric telescopic rod (535) is fixed on the inner wall of the enclosed box (51). The movable end of the electric telescopic rod (535) passes through the bottom end of the limiting box (531) and is fixedly connected to the limiting plate (534). The controller (536) is fixed on the enclosed box (51), and the electric telescopic rod (535) and the weight sensor (542) are both electrically connected to the controller (536).

2. The device for improving the coercivity of sintered NdFeB permanent magnet materials according to claim 1, characterized in that, The feeding assembly (6) includes: The unloading section (61) includes: An air pump (611) is mounted on a connecting pipe (21) and is electrically connected to the controller (536); An infrared sensor (612) is fixed on the inner wall of the connecting tube (21) and is used to output the displacement signal of the copper chloride powder in the connecting tube (21). The infrared sensor (612) is electrically connected to the controller (536). The storage pipe (613) is ring-shaped and fixed on the inner wall of the tank (2), and is connected to the connecting pipe (21); Multiple spray pipes (614) are provided, and the multiple spray pipes (614) are arranged around the axis of the tank (2). One end of the spray pipe (614) is connected to the storage pipe (613), and the other end is inclined towards the conveying pipe (3). The fixed plate (615) has multiple discharge ports; Multiple sealing plates (616) are provided, and each of the multiple sealing plates (616) corresponds to a multiple discharge port, and one end of each is fixedly connected to the other. The sealing plates (616) are rotatably connected to the fixed plate (615) through a rotating shaft. Gear 1 (617) is coaxially fixed on the rotating shaft; A drive unit (62) is disposed on the feed pipe (3) and is used to drive the gear (617) to rotate; The shocking part (63) is provided on the conveying pipe (3) and is used to shake the magnetic powder into the tank (2).

3. The device for improving the coercivity of sintered NdFeB permanent magnet materials according to claim 2, characterized in that, The drive unit (62) includes: The second electric telescopic rod (621) is fixed on the conveying pipe (3) and electrically connected to the controller (536); The first spur rack (622) is coaxially fixed to the movable end of the second electric telescopic rod (621) and meshes with the first gear (617).

4. The device for improving the coercivity of sintered NdFeB permanent magnet materials according to claim 3, characterized in that, The shock-absorbing part (63) includes: The shock box (631) is fixed on the inner wall of the conveying pipe (3); A rotating rod (632) has one end inserted through the shock box (631) and is rotatably connected to the shock box (631); Gear 2 (633) is coaxially fixed to one end of the rotating rod (632) and meshes with the spur rack 1 (622); An incomplete gear (634) is coaxially fixed to the other end of the rotating rod (632) and is located inside the shock box (631); The second spur rack (635) meshes with the incomplete gear (634) and is slidably connected to the shock box (631) via a limiting plate; The compression spring (636) is fixed at both ends to the inner wall of the shock box (631) and the straight rack (635) respectively. In the initial state, the compression spring (636) is in a compressed state. The shock hammer (637) is fixed on the end of the rack (635) away from the compression spring (636).

5. The device for improving the coercivity of sintered NdFeB permanent magnet materials according to claim 1, characterized in that, A fixing component (4) is provided between the tank body (2) and the conveying pipe (3), the fixing component (4) comprising: A retaining ring (41) is fixedly sleeved on the conveying pipe (3); The limiting ring (42) is fixedly sleeved on the top opening of the tank body (2) and has a slot (421) for engaging the retaining ring (41) in the slot (421).

6. The device for improving the coercivity of sintered NdFeB permanent magnet materials according to claim 3, characterized in that, The drive unit (62) is provided in two sets, and the two sets of drive units (62) are respectively located on both sides of the gear (617).

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