A high-performance NdFeB-based permanent magnet material preparation device that prevents particle breakage

Abstract

The present invention discloses a high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage, belonging to the field of magnet processing technology, comprising a furnace, an inner surface of the furnace outlet is provided with an annular cavity, and a cavity one and a cavity two are respectively provided in the side walls of the furnace, an outer surface of the furnace is mounted with an electric motor, an output end of the electric motor is fixedly connected to a transmission shaft, and the other end of the transmission shaft extends into the cavity two. The present invention can automatically open and close the furnace, and at the same time, the crucible can enter and exit the furnace synchronously with the opening and closing of the furnace, shortening the opening and closing time of the furnace, minimizing the dissipation of the temperature inside the furnace, thereby reducing the cost of heating loss, and only a single electric motor is needed to meet the use requirements, further reducing the cost investment, and can fully seal the furnace, facilitating the subsequent vacuum operation of the furnace, and also ensuring the vacuum state inside the furnace, indirectly improving the performance of the NdFeB-based permanent magnet material.

Description

Technical Field

[0001] The present invention relates to the technical field of magnet processing, and in particular to a high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage. Background Art

[0002] NdFeB-based permanent magnet materials are currently the most powerful permanent magnets with high magnetic energy product and high cost-effectiveness. NdFeB has the characteristics of small size, light weight and strong magnetism. It is the magnet with the best performance-price ratio to date. Due to its energy-saving and environmentally friendly characteristics, NdFeB is widely used in information technology, automobiles, nuclear magnetic resonance, wind power generation and motor fields. Improving the performance of bonded NdFeB magnets and improving the performance of isotropic bonded NdFeB magnetic powder to achieve a high magnetic energy product of more than 15MGOe has become a technical research project in this field. The first step in preparing NdFeB-based permanent magnet materials is smelting and ingot making.

[0003] After searching, Chinese patent number CN103779027A discloses a bonded rare earth magnetic powder and its preparation equipment. Although it describes the process of preparing bonded NdFeB permanent magnet materials with high magnetic energy product and low intrinsic coercivity, it does not make corresponding innovations in the preparation equipment. Therefore, the raw materials are still smelted and ingotized in an ordinary vacuum melting furnace. Therefore, the vacuum melting furnace needs to be opened and closed manually and the crucible needs to be manually taken out, which cannot be done simultaneously. At the same time, the temperature in the vacuum melting furnace is easily dissipated, so repeated heating is required, which increases the cost investment and brings about equipment defects. Summary of the Invention

[0004] The purpose of the present invention is to solve the defects in the prior art and to propose a high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-performance NdFeB-based permanent magnet material preparation device that prevents particle breakage includes a furnace, an annular cavity is formed on the inner surface of the furnace outlet, and a cavity 1 and a cavity 2 are respectively formed in the side walls of the furnace, an electric motor is mounted on the outer surface of the furnace, a transmission shaft is fixedly connected to the output end of the electric motor, the other end of the transmission shaft extends into the cavity 2, and a helical gear 1 is fixedly connected to the protruding end of the transmission shaft, the outer surface of the helical gear 1 is meshedly connected to the helical gear 2, and the inner surface of the helical gear 2 is fixedly connected to the lead screw. The outer surface of the screw rod is engaged with a movable sleeve 1, the inner surface of the movable sleeve 1 is provided with an internal thread 1, the outer surface of the movable sleeve 1 is fixedly connected to a slide rod 1, the other end of the slide rod 1 is fixedly connected to a lifting platform, the outer surfaces of the lifting platform are respectively fixedly connected to slide rods 2 and 3, the other end of the slide rod 3 is fixedly connected to a movable sleeve 2, the inner surface of the movable sleeve 2 is provided with an internal thread 2, and the inner sleeve of the movable sleeve 2 is provided with a rotating shaft, the outer surface of the rotating shaft is provided with an external thread, and the outer surface of the top end of the rotating shaft is fixedly connected to a transmission gear.

[0007] Furthermore, the helical gear 1, the helical gear 2 and the screw are all slidably connected to the cavity 2, the movable sleeve 2 and the rotating shaft are all slidably connected to the cavity 1, and the screw is rotatably connected to both ends of the cavity 2, and the rotating shaft is rotatably connected to both ends of the cavity 1.

[0008] Furthermore, the sliding rod 2 is arranged in a T shape, and the sliding rod 1, the sliding rod 2 and the sliding rod 3 are all slidably connected to the inner surface of the furnace.

[0009] Furthermore, the upper and lower sides of the slide rods one and three are fixedly connected with fixed nestings, the other end of the fixed nestings is slidably sleeved with a primary nesting, the other end of the primary nestings is slidably sleeved with a secondary nesting, the fixed nestings and the primary nestings and the primary nestings and the secondary nestings are connected by sliders, and a crucible is embedded and placed on the top surface of the lifting platform.

[0010] Furthermore, there are multiple secondary nestings, and the multiple secondary nestings are slidably connected in sequence. The fixed nesting and the primary nesting cooperate with the secondary nesting to block the communication between the inner cavity of the melting furnace and the cavity one and cavity two.

[0011] Furthermore, the outer surface of the transmission gear is meshedly connected with a gear ring, the upper and lower sides of the gear ring are fixed with slip rings, and the inner surface of the gear ring is hinged with a pull rod, and the other end of the pull rod is rotatably connected to a stopper.

[0012] Furthermore, the stopper, pull rod and gear ring are all slidably connected to the ring cavity, the slip ring is slidably connected to the upper and lower ends of the ring cavity, and the slip ring blocks the gap between the gear ring and the ring cavity, one corner of the stopper is rotatably connected to the bottom surface of the ring cavity, and the stopper and pull rod are evenly distributed about the central axis of the furnace outlet.

[0013] Furthermore, a guide groove is provided in the stop block, one end of the guide groove is slidably sleeved with a push rod, the other end of the push rod is fixedly connected to a pressure block 1, the other end of the pressure block 1 is slidably connected to a pressure block 2, the bottom surface of the pressure block 2 is respectively fixedly connected to a spring 1 and a sealing ring, a cavity 3 is provided on the other side of the sealing ring, a clamping rod is slidably sleeved on the bottom wall of the cavity 3, and a spring 2 is installed between the clamping rod and the top surface of the cavity 3.

[0014] Furthermore, the cross-sections of the pressure block 1 and the pressure block 2 are both set in the shape of a right triangle, the guide groove limits the vertical movement of the pressure block 2, and the guide groove limits the horizontal movement of the pressure block 1. The bottom end of the spring 1 is fixed to the guide groove, and the sealing ring blocks the gap between the bottom surface of the block and the annular cavity. The bottom end of the clamping rod is set in a hemispherical shape, and the clamping rod is clamped to the bottom surface of the annular cavity.

[0015] Furthermore, the lead angle between the second internal thread and the external thread is greater than the friction angle, and the lead angle of the first internal thread is less than or equal to the friction angle.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention engages the internal thread 2 on the inner surface of the movable sleeve 2 with the external thread on the rotating shaft, so that the movable sleeve 2 drives the external thread to rotate through the internal thread 2, so that the rotating shaft on the external thread rotates, and then the transmission gear at the top of the rotating shaft drives the gear ring engaged with it to rotate, so that the gear ring pulls one end of the pull rod to move, so that the other end of the pull rod pulls the stopper to rotate, thereby achieving the purpose of automatically opening and closing the furnace. At the same time, the crucible can be put into and out of the furnace synchronously with the opening and closing of the furnace, shortening the opening and closing time of the furnace, minimizing the dissipation of the temperature inside the furnace, thereby reducing the cost of heating loss, and only a single motor is needed to meet the use requirements, further reducing the cost investment.

[0018] 2. The present invention uses the mutual contact of the blocks to compress the push rod on the block into the guide groove, so that the push rod pushes the pressure block 1 in the guide groove to move horizontally, so that the inclined surface of the pressure block 1 squeezes the inclined surface of the pressure block 2, and the pressure block 2 cannot move horizontally due to the restriction of the guide groove, so that the combined force of the pressure block 2 is vertically downward, so that the pressure block 2 pushes the sealing ring to squeeze the bottom surface of the ring cavity, so that the sealing ring can fully seal the gap between the block and the bottom surface of the ring cavity, thereby achieving the purpose of fully sealing the furnace, thereby facilitating the subsequent vacuum operation of the furnace, and also ensuring the vacuum state inside the furnace, indirectly improving the performance of the NdFeB-based permanent magnet material.

[0019] 3. The clamping rod of the present invention contracts into cavity three as the sealing ring squeezes the bottom surface of the ring cavity, and squeezes spring two. When the blocks contact each other, the clamping rod will move to a predetermined position. At this time, the bottom surface of the ring cavity will no longer restrict the movement of the clamping rod, so that the clamping rod and the bottom surface of the ring cavity are clamped, thereby achieving the purpose of fixing the sealing ring and the block, and avoiding the impact of the seal between the blocks due to the rebound of the top rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0021] Figure 1 This is a schematic diagram of the overall structure of a high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage proposed by the present invention;

[0022] Figure 2 A cross-sectional view of a furnace for preparing a high-performance NdFeB-based permanent magnet material that is resistant to particle breakage, as proposed by the present invention;

[0023] Figure 3 A schematic diagram of the crucible structure of a particle-breakage-resistant, high-performance NdFeB-based permanent magnet material preparation device proposed by the present invention;

[0024] Figure 4 This is a schematic diagram of the gear ring structure of a high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage proposed by the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the movable sleeve 2 of the high-performance NdFeB-based permanent magnet material preparation equipment that is resistant to particle breakage proposed by the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of a helical gear of a high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage proposed by the present invention;

[0027] Figure 7 This is a bottom-view cross-sectional view of a stopper structure of a high-performance NdFeB-based permanent magnet material preparation device that prevents particle breakage proposed by the present invention;

[0028] Figure 8 This is a front view of the second structure of a compact of a high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage proposed by the present invention;

[0029] Figure 9 This is a cross-sectional view of the fixed nested structure of a high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage proposed by the present invention.

[0030] In the figure: 1. furnace; 2. annular cavity; 3. cavity one; 4. cavity two; 5. motor; 6. bevel gear one; 7. bevel gear two; 8. screw; 9. movable sleeve one; 10. slide rod one; 11. lifting platform; 12. slide rod two; 13. slide rod three; 14. movable sleeve two; 15. internal thread two; 16. rotating shaft; 17. external thread; 18. transmission gear; 19. gear ring; 20. slip ring; 21. pull rod; 22. stop block; 23. ejector rod; 24. pressure block one; 25. pressure block two; 26. spring one; 27. sealing ring; 28. cavity three; 29. ​​clamping rod; 30. spring two; 31. fixed nesting; 32. primary nesting; 33. secondary nesting; 34. slider; 35. crucible. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0033] Example 1:

[0034] See also Figures 1-6 and Figure 9The present invention provides a technical solution: a high-performance NdFeB-based permanent magnet material preparation device that prevents particle breakage, comprising a furnace 1, an annular cavity 2 is provided on the inner surface of the outlet of the furnace 1, and a cavity 1 3 and a cavity 2 4 are respectively provided in the side walls of the furnace 1, an electric motor 5 is installed on the outer surface of the furnace 1, the output end of the electric motor 5 is fixedly connected to a transmission shaft, the other end of the transmission shaft extends into the cavity 2 4, and a helical gear 1 6 is fixedly connected to the protruding end of the transmission shaft, the outer surface of the helical gear 1 6 is meshedly connected to the helical gear 2 7, the inner surface of the helical gear 2 7 is fixedly connected to a screw rod 8, the outer surface of the screw rod 8 is meshedly sleeved with a movable sleeve 1 9, the inner surface of the movable sleeve 1 9 is provided with an internal thread 1, and the outer surface of the movable sleeve 1 9 is fixedly connected to the inner surface of the movable sleeve 1 There is a slide rod 10, the other end of the slide rod 10 is fixedly connected to a lifting platform 11, the outer surface of the lifting platform 11 is respectively fixedly connected to a slide rod 2 12 and a slide rod 3 13, the other end of the slide rod 3 13 is fixedly connected to a movable sleeve 2 14, the inner surface of the movable sleeve 2 14 is provided with an internal thread 2 15, and the movable sleeve 2 14 is provided with a rotating shaft 16, the outer surface of the rotating shaft 16 is provided with an external thread 17, and the top outer surface of the rotating shaft 16 is fixedly connected with a transmission gear 18, the bevel gear 1 6, the bevel gear 2 7 and the screw rod 8 are all slidably sleeved with the cavity 2 4, the movable sleeve 2 14 and the rotating shaft 16 are all slidably sleeved with the cavity 1 3, and the screw rod 8 is rotatably connected to the two ends of the cavity 2 4, and the rotating shaft 16 is rotatably connected to the two ends of the cavity 1 3, the slide rod The second slide 12 is set in a T shape, and the slide bar 10, the slide bar 2 12 and the slide bar 3 13 are all slidably sleeved with the inner surface of the furnace 1. The upper and lower sides of the slide bar 10 and the slide bar 3 13 are fixedly connected with a fixed nesting 31, and the other end of the fixed nesting 31 is slidably sleeved with a primary nesting 32, and the other end of the primary nesting 32 is slidably sleeved with a secondary nesting 33. The fixed nesting 31 and the primary nesting 32 and the primary nesting 32 and the secondary nesting 33 are connected by a slider 34. A crucible 35 is embedded in the top surface of the lifting platform 11. There are multiple secondary nestings 33, and the multiple secondary nestings 33 are slidably sleeved in sequence. The fixed nesting 31 and the primary nesting 32 cooperate with the secondary nesting 33 to block the inner cavity of the furnace 1 and the cavity 1 3 is connected with cavity 2 4, the rise angle of internal thread 2 15 and external thread 17 is greater than the friction angle, the rise angle of internal thread 1 is less than or equal to the friction angle, the outer surface of the transmission gear 18 is meshed with a gear ring 19, the upper and lower sides of the gear ring 19 are fixed with slip rings 20, and the inner surface of the gear ring 19 is hinged with a pull rod 21, the other end of the pull rod 21 is rotatably connected with a stopper 22, the stopper 22, the pull rod 21 and the gear ring 19 are all slidably connected with the annular cavity 2, the slip ring 20 is slidably connected with the upper and lower ends of the annular cavity 2, and the slip ring 20 blocks the gap between the gear ring 19 and the annular cavity 2, one corner of the stopper 22 is rotatably connected with the bottom surface of the annular cavity 2, and the stopper 22 and the pull rod 21 are evenly distributed about the central axis of the outlet of the furnace 1.

[0035] Specifically, during the process of smelting raw materials for making ingots of NdFeB-based permanent magnet materials, the raw materials with a good proportion are placed in the crucible 35. At this time, the motor 5 on the outer surface of the furnace 1 is started, so that the motor 5 drives the helical gear 2 7 to rotate through the helical gear 1 6 on the transmission shaft, thereby causing the screw rod 8 on the helical gear 2 7 to rotate, and the movable sleeve 1 9 engaged with the screw rod 8 is limited by the slide rod 10 and cannot rotate, so that the movable sleeve 1 9 can only move vertically, and then the movable sleeve 1 9 drives the lifting platform 11 to rise through the slide rod 10. In this process, As the lifting platform 11 rises, the lifting platform 11 will drive the movable sleeve 2 14 to rise through the slide rod 3 13, so that the internal thread 2 15 on the inner surface of the movable sleeve 2 14 is meshed with the external thread 17 on the rotating shaft 16, so that the movable sleeve 2 14 drives the external thread 17 to rotate through the internal thread 2 15, so that the rotating shaft 16 on the external thread 17 rotates, and then the transmission gear 18 at the top of the rotating shaft 16 drives the gear ring 19 meshed with it to rotate, so that the gear ring 19 pulls one end of the pull rod 21 to move, so that the other end of the pull rod 21 pulls the stopper 22 The stopper 22 is rotated so as to gradually shrink into the annular cavity 2, thereby gradually opening the outlet of the furnace 1. When the outlet of the furnace 1 is completely opened, the movable sleeve 2 14 is just separated from the external thread 17, and the lifting platform 11 continues to rise until the lifting platform 11 moves to the top of the screw rod 8. At this time, the crucible 35 is placed on the lifting platform 11, and the motor 5 is started in the reverse direction, so that the bevel gear 1 6, the bevel gear 2 7 and the screw rod 8 are reversed, so that the lifting platform 11 drives the crucible 35 to descend, and as the lifting platform 11 continues to descend, the bottom end of the movable sleeve 2 14 is again separated from the external thread 17. The external thread 17 is engaged, so that the external thread 17 drives the transmission gear 18 to reverse, so that the gear ring 19 and the stopper 22 repeat the above operation in reverse, and then the stopper 22 reseals the outlet of the furnace 1, thereby achieving the purpose of automatically opening and closing the furnace 1. At the same time, the crucible 35 can enter and exit the furnace 1 synchronously with the opening and closing of the furnace 1, shortening the opening and closing time of the furnace 1, minimizing the dissipation of the internal temperature of the furnace 1, thereby reducing the cost of heating loss, and only a single motor 5 is needed to meet the use requirements, further reducing the cost investment.

[0036] Example 2:

[0037] See also Figure 7-Figure 8The present invention provides a technical solution: a high-performance NdFeB-based permanent magnet material preparation device that prevents particle breakage, a guide groove is provided in the stopper 22, one end of the guide groove is slidably sleeved with a push rod 23, the other end of the push rod 23 is fixedly connected with a pressure block 1 24, the other end of the pressure block 1 24 is slidably connected with a pressure block 25, the bottom surface of the pressure block 25 is respectively fixed with a spring 1 26 and a sealing ring 27, the cross-sections of the pressure blocks 1 24 and 25 are both arranged in a right-angled triangle, the guide groove limits the vertical movement of the pressure block 25, and the guide groove limits the horizontal movement of the pressure block 1 24, the bottom end of the spring 1 26 is fixedly connected to the guide groove, and the sealing ring 27 blocks the gap between the bottom surface of the stopper 22 and the annular cavity 2.

[0038] Specifically, in the process of sealing the furnace 1, when the crucible 35 just completely enters the furnace 1, the stopper 22 begins to close the furnace 1 until the side walls of the stopper 22 contact each other, and as the stoppers 22 contact each other, the push rod 23 on the stopper 22 is compressed and retracted into the guide groove, so that the push rod 23 pushes the pressure block 1 24 in the guide groove to move horizontally, so that the inclined surface of the pressure block 1 24 squeezes the inclined surface of the pressure block 2 25, and the pressure block 25 cannot move horizontally under the restriction of the guide groove, so that the combined force of the pressure block 25 is vertically downward, so that the pressure block 25 pushes the sealing ring 27 to squeeze the bottom surface of the ring cavity 2, so that the sealing ring 27 can fully seal the gap between the stopper 22 and the bottom surface of the ring cavity 2, thereby achieving the purpose of fully sealing the furnace 1, thereby facilitating the subsequent vacuum operation of the furnace 1, and also ensuring the vacuum state inside the furnace 1, indirectly improving the performance of the NdFeB-based permanent magnet material.

[0039] Example 3:

[0040] Please refer to 8. The present invention provides a technical solution: a high-performance NdFeB-based permanent magnet material preparation device that prevents particle breakage. A cavity three 28 is opened on the other side of the sealing ring 27. A clamping rod 29 is slidably sleeved on the bottom wall of the cavity three 28. A spring two 30 is installed between the clamping rod 29 and the top surface of the cavity three 28. The bottom end of the clamping rod 29 is hemispherical, and the clamping rod 29 is clamped with the bottom surface of the ring cavity 2.

[0041] Specifically, in the process of fixing the stopper 22, as the sealing ring 27 squeezes the bottom surface of the ring cavity 2, the clamping rod 29 on the sealing ring 27 will shrink into the cavity three 28 and squeeze the spring two 30. When the stoppers 22 contact each other, the clamping rod 29 will move to the predetermined position. At this time, the bottom surface of the ring cavity 2 will no longer restrict the movement of the clamping rod 29, so that the clamping rod 29 is clamped with the bottom surface of the ring cavity 2, thereby achieving the purpose of fixing the sealing ring 27 and the stopper 22 and avoiding the rebound of the push rod 23 affecting the seal between the stoppers 22.

[0042] The working principle and use process of the present invention are as follows: when it is necessary to melt the raw materials of NdFeB-based permanent magnet material to make ingots, the raw materials with a good proportion are placed in the crucible 35, and then the motor 5 on the outer surface of the furnace 1 is started, so that the motor 5 drives the helical gear 2 7 to rotate through the helical gear 1 6 on the transmission shaft, thereby causing the screw rod 8 on the helical gear 2 7 to rotate, and the movable sleeve 1 9 engaged with the screw rod 8 is limited by the slide rod 10 and cannot rotate, so that the movable sleeve 1 9 can only move vertically, and then the movable sleeve 1 9 drives the lifting platform 11 to rise through the slide rod 10. During this process, as the lifting platform 11 rises, the lifting platform 11 will drive the movable sleeve 2 14 to rise through the slide bar 3 13, so that the internal thread 2 15 on the inner surface of the movable sleeve 2 14 is meshed with the external thread 17 on the rotating shaft 16, so that the movable sleeve 2 14 drives the external thread 17 to rotate through the internal thread 2 15, so that the rotating shaft 16 on the external thread 17 rotates, and then the transmission gear 18 at the top of the rotating shaft 16 drives the gear ring 19 meshed with it to rotate, so that the gear ring 19 pulls one end of the pull rod 21 to move, so that the other end of the pull rod 21 is pulled The movable stopper 22 rotates, causing the stopper 22 to gradually shrink into the annular cavity 2, thereby gradually opening the outlet of the furnace 1. When the outlet of the furnace 1 is completely opened, the movable sleeve 2 14 is just separated from the external thread 17, and the lifting platform 11 continues to rise until the lifting platform 11 moves to the top of the screw rod 8. At this time, the crucible 35 is placed on the lifting platform 11, and the motor 5 is started in the reverse direction, so that the bevel gear 1 6, the bevel gear 2 7 and the screw rod 8 are reversed, so that the lifting platform 11 drives the crucible 35 to descend, and as the lifting platform 11 continues to descend, the bottom end of the movable sleeve 2 14 is again The outer thread 17 is meshed with the outer thread 17 again, so that the outer thread 17 drives the transmission gear 18 to reverse, so that the gear ring 19 and the stopper 22 repeat the above operation in the reverse direction, and then the stopper 22 reseals the outlet of the furnace 1, thereby achieving the purpose of automatically opening and closing the furnace 1. At the same time, the crucible 35 can enter and exit the furnace 1 synchronously with the opening and closing of the furnace 1, shortening the opening and closing time of the furnace 1, minimizing the dissipation of the internal temperature of the furnace 1, thereby reducing the cost of heating loss, and only a single motor 5 is needed to meet the use requirements, further reducing the investment cost;

[0043] In the above process, when the crucible 35 just completely enters the furnace 1, the stopper 22 begins to close the furnace 1 until the side walls of the stopper 22 contact each other. As the stoppers 22 contact each other, the push rod 23 on the stopper 22 is compressed and retracted into the guide groove, so that the push rod 23 pushes the pressure block 1 24 in the guide groove to move horizontally, so that the inclined surface of the pressure block 1 24 squeezes the inclined surface of the pressure block 25, and the pressure block 25 cannot move horizontally under the restriction of the guide groove, so that the combined force of the pressure block 25 is vertically downward, so that the pressure block 25 pushes the sealing ring 27 to squeeze the bottom surface of the annular cavity 2, so that the sealing ring 27 can fully seal the gap between the stopper 22 and the bottom surface of the annular cavity 2, thereby achieving the purpose of fully sealing the furnace 1, thereby facilitating the subsequent vacuum operation of the furnace 1, and also ensuring the vacuum state inside the furnace 1, indirectly improving the performance of the NdFeB-based permanent magnet material;

[0044] During the above process, as the sealing ring 27 squeezes the bottom surface of the ring cavity 2, the clamping rod 29 on the sealing ring 27 will shrink into the cavity three 28 and squeeze the spring two 30. When the blocks 22 contact each other, the clamping rod 29 will move to the predetermined position. At this time, the bottom surface of the ring cavity 2 will no longer restrict the movement of the clamping rod 29, so that the clamping rod 29 is stuck with the bottom surface of the ring cavity 2, thereby achieving the purpose of fixing the sealing ring 27 and the block 22, avoiding the rebound of the push rod 23 and affecting the seal between the blocks 22, and completing the operation.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage, characterized in that: The invention comprises a furnace (1), wherein an annular cavity (2) is provided on the inner surface of the outlet of the furnace (1), and a cavity 1 (3) and a cavity 2 (4) are respectively provided in the side wall of the furnace (1), and an electric motor (5) is installed on the outer surface of the furnace (1), and an output end of the electric motor (5) is fixedly connected to a transmission shaft, and the other end of the transmission shaft extends into the cavity 2 (4), and a helical gear 1 (6) is fixedly connected to the protruding end of the transmission shaft, and the outer surface of the helical gear 1 (6) is meshedly connected to the helical gear 2 (7), and the inner surface of the helical gear 2 (7) is fixedly connected to a screw rod (8), and the outer surface of the screw rod (8) is meshedly sleeved with a movable sleeve 1 (9), and the movable sleeve The inner surface of the first (9) is provided with an internal thread, the outer surface of the movable sleeve (9) is fixedly connected with a slide rod (10), the other end of the slide rod (10) is fixedly connected with a lifting platform (11), the outer surface of the lifting platform (11) is respectively fixedly connected with a slide rod (12) and a slide rod (13), the other end of the slide rod (13) is fixedly connected with a movable sleeve (14), the inner surface of the movable sleeve (14) is provided with an internal thread (15), and the inner sleeve of the movable sleeve (14) is provided with a rotating shaft (16), the outer surface of the rotating shaft (16) is provided with an external thread (17), and the outer surface of the top end of the rotating shaft (16) is fixedly connected with a transmission gear (18); The outer surface of the transmission gear (18) is meshedly connected with a gear ring (19), the upper and lower sides of the gear ring (19) are fixed with slip rings (20), and the inner surface of the gear ring (19) is hinged with a pull rod (21), and the other end of the pull rod (21) is rotatably connected to a stopper (22); The stopper (22), the pull rod (21) and the gear ring (19) are all slidably connected to the annular cavity (2), the slip ring (20) is slidably connected to the upper and lower ends of the annular cavity (2), and the slip ring (20) blocks the gap between the gear ring (19) and the annular cavity (2), one corner of the stopper (22) is rotatably connected to the bottom surface of the annular cavity (2), and the stopper (22) and the pull rod (21) are evenly distributed about the central axis of the outlet of the furnace (1); A guide groove is provided in the stopper (22), one end of the guide groove is slidably sleeved with a push rod (23), the other end of the push rod (23) is fixedly connected with a pressure block 1 (24), the other end of the pressure block 1 (24) is slidably connected with a pressure block 2 (25), the bottom surface of the pressure block 2 (25) is respectively fixedly connected with a spring 1 (26) and a sealing ring (27), a cavity 3 (28) is provided on the other side of the sealing ring (27), a clamping rod (29) is slidably sleeved on the bottom wall of the cavity 3 (28), and a spring 2 (30) is installed between the clamping rod (29) and the top surface of the cavity 3 (28).

2. The high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage according to claim 1, characterized in that: The helical gear 1 (6), the helical gear 2 (7) and the screw rod (8) are all slidably connected to the cavity 2 (4), the movable sleeve 2 (14) and the rotating shaft (16) are all slidably connected to the cavity 1 (3), and the screw rod (8) is rotatably connected to both ends of the cavity 2 (4), and the rotating shaft (16) is rotatably connected to both ends of the cavity 1 (3).

3. The high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage according to claim 1, characterized in that: The second slide bar (12) is arranged in a T shape, and the first slide bar (10), the second slide bar (12) and the third slide bar (13) are all slidably connected to the inner surface of the furnace (1).

4. The high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage according to claim 1, characterized in that: The upper and lower sides of the slide bar 1 (10) and the slide bar 3 (13) are fixedly connected with a fixed nesting (31), the other end of the fixed nesting (31) is slidably connected with a primary nesting (32), and the other end of the primary nesting (32) is slidably connected with a secondary nesting (33), the fixed nesting (31) and the primary nesting (32) and the primary nesting (32) and the secondary nesting (33) are connected by a slider (34), and a crucible (35) is embedded in the top surface of the lifting platform (11).

5. The high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage according to claim 4, characterized in that: The secondary nesting (33) is provided in plurality, and the plurality of secondary nestings (33) are slidably connected in sequence, and the fixed nesting (31) and the primary nesting (32) cooperate with the secondary nesting (33) to block the communication between the inner cavity of the melting furnace (1) and the cavity one (3) and the cavity two (4).

6. The high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage according to claim 1, characterized in that: The cross sections of the pressure block 1 (24) and the pressure block 2 (25) are both in the shape of right triangles. The guide groove limits the vertical movement of the pressure block 2 (25), and the guide groove limits the horizontal movement of the pressure block 1 (24). The bottom end of the spring 1 (26) is fixed to the guide groove. The sealing ring (27) blocks the gap between the bottom surface of the stop block (22) and the annular cavity (2). The bottom end of the clamping rod (29) is in the shape of a hemisphere, and the clamping rod (29) is clamped to the bottom surface of the annular cavity (2).

7. The high-performance NdFeB-based permanent magnet material preparation device that is resistant to particle breakage according to claim 1, characterized in that: The lead angle between the second internal thread (15) and the external thread (17) is greater than the friction angle, and the lead angle of the first internal thread is less than or equal to the friction angle.

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