Vacuum sintering device for high-coercivity neodymium iron boron magnetic steel

Abstract

The utility model relates to a high-coercivity neodymium iron boron magnetic steel vacuum sintering device which comprises a sintering furnace body, three mounting frames are fixedly connected to the end of the sintering furnace body, two third rotating shafts are rotatably connected to the mounting frames, a rotating frame is rotatably connected between the two third rotating shafts, and a fixing frame is slidably connected to the rotating frame. A motor is fixedly connected to the end of the fixing frame, a lead screw is rotationally connected to the center of the fixing frame, the end of the lead screw is fixedly connected with an output shaft of the motor, the lead screw is in threaded connection with the rotating frame, the sealing door is rotated firstly, the sealing door is in sliding fit with the inclined face on the fixing frame, and then the fixing frame is driven to move outwards; when the sealing door is completely attached to the end of the sintering furnace body, the motor drives the lead screw to rotate in the center of the rotating frame, at the moment, the sealing door is firmly fixed to the sintering furnace body through the three fixing frames, firmness is high, repeated bolt rotating is avoided, and the installation efficiency is high.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of sintering devices, in particular to a high-coercivity neodymium-iron-boron magnetic steel vacuum sintering device. BACKGROUND

[0002] The neodymium-iron-boron magnetic steel is a high-performance permanent magnet material, and the high-coercivity neodymium-iron-boron magnetic steel refers to the neodymium-iron-boron magnetic steel with high coercivity value. The neodymium-iron-boron magnetic steel needs to go through the steps of smelting, powder making, forming and sintering in the production process. A sintering device is usually used in the sintering process of the neodymium-iron-boron magnetic steel to densify the material and improve the density and magnetic properties of the magnetic steel.

[0003] However, when the furnace door of the traditional sintering device is closed, the bolt is usually directly used for fixation, so that the bolt needs to be repeatedly rotated when the furnace door is closed and opened, thereby causing low operation efficiency and poor flexibility. CONTENT OF THE UTILITY MODEL

[0004] In order to quickly fix the sealing door, avoid repeatedly rotating the bolt and improve the operation efficiency, the application provides a high-coercivity neodymium-iron-boron magnetic steel vacuum sintering device.

[0005] The application provides a high-coercivity neodymium-iron-boron magnetic steel vacuum sintering device, which adopts the following technical scheme:

[0006] The high-coercivity neodymium-iron-boron magnetic steel vacuum sintering device comprises a sintering furnace body, a fixing structure is arranged on the sintering furnace body, the fixing structure comprises a mounting frame, three mounting frames are fixedly connected to the end portions of the sintering furnace body, two third rotating shafts are rotatably connected to the mounting frames, a rotating frame is rotatably connected between the two third rotating shafts, a fixing frame is slidably connected to the rotating frame, an electric motor is fixedly connected to the end portion of the fixing frame, a lead screw is rotatably connected to the center position of the fixing frame, the output shaft of the electric motor is fixedly connected to the end portion of the lead screw, the lead screw is in threaded connection with the rotating frame, and a sealing structure is matched with the sintering furnace body.

[0007] By adopting the technical scheme, when the neodymium iron boron magnetic steel material is added and the sealing door is closed, the sealing door is first rotated, and when the sealing door is about to be completely attached to the end of the sintering furnace body, the edge of the sealing door first collides with the fixed frame, at this time, the edge of the sealing door and the inclined surface on the fixed frame are in sliding fit, and then the fixed frame is driven to move outward, the fixed frame drives the rotating frame to rotate around the third rotating shaft on the mounting frame by a certain angle, until the fixed frame no longer blocks the movement of the sealing door, when the sealing door is completely attached to the end of the sintering furnace body, the rotating frame is rotated to the initial position, at this time, the motor drives the screw rod to rotate at the center position of the rotating frame, since the screw rod is in threaded connection with the rotating frame, the fixed frame is driven to move away from the sealing door, until the end of the fixed frame is tightly attached to the edge of the sealing door, and the other two fixed frames repeat the same operation, at this time, the three fixed frames firmly fix the sealing door on the sintering furnace body, the firmness is high, the repeated rotation of the bolt is avoided, and the installation efficiency is high.

[0008] Optionally, the two third rotating shafts are symmetrically arranged, and a torsional spring is fixedly connected between the end of one third rotating shaft and the rotating frame.

[0009] By adopting the technical scheme, a torsional spring is arranged between the end of the third rotating shaft and the rotating frame, so that the rotating frame drives the fixed frame to rotate to the initial position, the end of the fixed frame is located directly above the edge of the sealing door, the subsequent clamping and fixing of the sealing door are facilitated, and the flexibility is improved.

[0010] Optionally, the fixed frame is in an "L" shape structure, and the end of the fixed frame is provided with an inclined surface.

[0011] By adopting the technical scheme, the fixed frame is arranged in an "L" shape structure, so that the edge of the sealing door is clamped and fixed, one side of the fixed frame in contact with the sealing door is provided with an inclined surface, the "L" shaped fixed frame is driven to rotate outward during the closing of the sealing door, and the sealing door is not blocked, and the flexibility is high.

[0012] Optionally, the mounting frame is in an "L" shape structure, and the rotating frame is in a "U" shape structure.

[0013] By adopting the technical scheme, the rotating frame is arranged in a "U" shape structure, so that the motor is facilitated to be installed, and the operation is simple and convenient.

[0014] Optionally, a sealing ring is arranged between the sealing door and the sintering furnace body, and a handle is fixedly connected to the outer side of the sealing door.

[0015] By adopting the technical scheme, a sealing ring is arranged between the sealing door and the sintering furnace body, and the sealing property of the inside of the sintering furnace body is ensured.

[0016] Optionally, the handle is in a "U" shape structure, and a rotating structure is connected to the sealing door.

[0017] By adopting the above technical scheme, the handle is arranged in a "U" shape structure, which is convenient to grasp.

[0018] Optionally, a limiting groove is arranged on the sealing door near the fixed frame, and the fixed frame is clamped in the limiting groove.

[0019] By adopting the above technical scheme, the limiting groove is arranged on the edge of the sealing door, and the end of the fixed frame is clamped with the limiting groove, so that the firmness is improved.

[0020] Optionally, the rotating structure comprises a first rotating frame, two first rotating frames are fixedly connected to one end of the sintering furnace body near the sealing door, a first rotating shaft is fixedly connected to the first rotating frame, a second rotating frame is fixedly connected to the sealing door near the first rotating frame, a second rotating shaft is fixedly connected to the second rotating frame, and a connecting piece is rotatably connected between the first rotating shaft and the second rotating shaft.

[0021] By adopting the above technical scheme, in the process of opening the sealing door, the fixed frame is first rotated to the two sides of the sealing door, when the sealing door is opened, the second rotating frame on the sealing door is rotated through the second rotating shaft and the connecting piece by a certain angle, so that the sealing door can be smoothly opened, and the connecting piece is rotated through the first rotating shaft and the first rotating frame by a certain angle, so that the opening angle of the sealing door is increased, the sealing door is completely opened, the operation is simple, and the flexibility is high.

[0022] Optionally, the two first rotating frames are symmetrically arranged, and the connecting piece is in a "U" shape structure.

[0023] By adopting the above technical scheme, the connecting piece is arranged in a "U" shape structure, so that the strength of the connecting piece is improved, and the stability is ensured.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. When the sealing door is closed, the sealing door is tightly attached to the end of the sintering furnace body, the fixed frame is clamped at the edge of the sealing door by rotating the screw rod driven by the motor, so that the sealing door is quickly fixed, repeated disassembly of the bolt is avoided, and the installation efficiency is high.

[0026] 2. The connecting piece is connected between the first rotating shaft and the second rotating shaft, so that the sealing door is completely rotated to the side edge of the sintering furnace body after being opened, and the addition of materials is avoided, and the flexibility is high. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1The whole structure schematic view of the utility model is shown in the figure.

[0028] Figure 2 As Figure 1 The A part structure enlarged schematic view shown in the figure.

[0029] Figure 3 The connection structure schematic view of the sintering furnace body and the sealing door of the utility model is shown in the figure.

[0030] Figure 4 As Figure 3 The B part enlarged schematic view shown in the figure.

[0031] Figure 5 The connection structure schematic view of the first rotating frame and the second rotating frame of the utility model is shown in the figure.

[0032] Reference signs: 1, sintering furnace body;2, sealing structure;201, sealing door;202, sealing ring;203, handle;3, rotating structure;301, first rotating frame;302, first rotating shaft;303, second rotating frame;304, second rotating shaft;305, connecting piece;4, fixed structure;401, mounting bracket;402, third rotating shaft;403, rotating bracket;404, torsional spring;405, fixed bracket;406, limiting groove;407, motor;408, screw rod. Specific implementation

[0033] The following will be combined with the Figures 1-5 The application is further explained in detail.

[0034] The embodiment of the application discloses a high-coercivity neodymium-iron-boron magnetic steel vacuum sintering device. Figure 1 、 Figure 2 and Figure 3 A high-coercivity neodymium-iron-boron magnetic steel vacuum sintering device comprises a sintering furnace body 1, wherein the sintering furnace body 1 is provided with a fixed structure 4, and the sintering furnace body 1 is matched with a sealing structure 2.

[0035] When the sealing door 201 is about to be completely attached to the end of the sintering furnace body 1, the edge of the sealing door 201 first collides with the fixed frame 405, at this time, the sliding fit between the edge of the sealing door 201 and the inclined surface on the fixed frame 405 drives the fixed frame 405 to move outward, the fixed frame 405 drives the rotating frame 403 to rotate around the third rotating shaft 402 on the mounting frame 401 by a certain angle, until the fixed frame 405 no longer blocks the movement of the sealing door 201, when the sealing door 201 is completely attached to the end of the sintering furnace body 1, the rotating frame 403 is rotated to the initial position, the position of the sealing door 201 close to the fixed frame 405 is provided with a limiting groove 406, and the end of the fixed frame 405 is clamped in the limiting groove 406, which improves the firmness, at this time, the motor 407 drives the lead screw 408 to rotate at the center position of the rotating frame 403, since the lead screw 408 is threadedly connected with the rotating frame 403, the fixed frame 405 is driven to move away from the sealing door 201, until the end of the fixed frame 405 is tightly attached to the edge of the sealing door 201, and the other two fixed frames 405 repeat the same operation, at this time, the three fixed frames 405 firmly fix the sealing door 201 on the sintering furnace body 1, which is firm, avoids repeatedly rotating the bolt, and is high in installation efficiency.

[0036] The rotating frame 403 is fixedly connected with one of the third rotating shafts 402, and the two third rotating shafts 402 are symmetrically arranged.

[0037] The torsional spring 404 is arranged between the end of the third rotating shaft 402 and the rotating frame 403, which facilitates the rotating frame 403 to drive the fixed frame 405 to rotate to the initial position, so that the end of the fixed frame 405 is located directly above the edge of the sealing door 201, and facilitates the subsequent clamping and fixing of the sealing door 201, and improves the flexibility.

[0038] The end of the fixed frame 405 is provided with an inclined surface, and one side of the fixed frame 405 in contact with the sealing door 201 is also provided with an inclined surface, which drives the "L"-shaped fixed frame 405 to rotate outward during the closing of the sealing door 201, so as not to block the closing of the sealing door 201, and the flexibility is high, the fixed frame 405 is in the shape of "L", which facilitates the clamping and fixing of the edge of the sealing door 201, and the rotating frame 403 is in the shape of "U", which facilitates the installation of the motor 407, and the operation is simple.

[0039] Referring to Figures 1-5The sealing door 201 is in contact with the sealing ring 202 between the sintering furnace body 1, and the outer side of the sealing door 201 is fixedly connected with the handle 203;

[0040] By arranging the sealing ring 202 between the sealing door 201 and the sintering furnace body 1, the sealing property of the sintering furnace body 1 is ensured.

[0041] With reference to Figures 1-5 The handle 203 is in "U" shape structure, and the sealing door 201 is connected with the rotating structure 3;

[0042] By arranging the handle 203 in "U" shape structure, the handle 203 is convenient to grasp.

[0043] With reference to Figure 3 、 Figure 4 and Figure 5 The rotating structure 3 comprises the first rotating frame 301, two first rotating frames 301 are fixedly connected on one end of the sintering furnace body 1 close to the sealing door 201, the first rotating shaft 302 is fixedly connected on the first rotating frame 301, the second rotating frame 303 is fixedly connected on the sealing door 201 close to the first rotating frame 301, the second rotating shaft 304 is fixedly connected on the second rotating frame 303, and the connecting piece 305 is rotatably connected between the first rotating shaft 302 and the second rotating shaft 304;

[0044] In the process of opening the sealing door 201, the fixed frame 405 is rotated on both sides of the sealing door 201, and when the sealing door 201 is opened, the second rotating frame 303 on the sealing door 201 is rotated at a certain angle between the second rotating shaft 304 and the connecting piece 305, so that the sealing door 201 can be smoothly opened, and the connecting piece 305 is rotated at a certain angle between the first rotating shaft 302 and the first rotating frame 301, thereby increasing the opening angle of the sealing door 201, ensuring that the sealing door 201 is completely opened, and the operation is simple and flexible.

[0045] With reference to Figure 3 、 Figure 4 and Figure 5 The two first rotating frames 301 are symmetrically arranged, and the connecting piece 305 is in "U" shape structure;

[0046] By arranging the connecting piece 305 in "U" shape structure, the strength of the connecting piece 305 is improved, and the stability is ensured.

[0047] The embodiment of the application discloses an implementation principle of a high-coercivity neodymium-iron-boron magnetic steel vacuum sintering device. When the addition of the neodymium-iron-boron magnetic steel material is completed and the sealing door 201 is closed, the sealing door 201 is first rotated. In the process of opening the sealing door 201, the fixed frame 405 is first rotated on both sides of the sealing door 201. When the sealing door 201 is opened, the second rotating frame 303 on the sealing door 201 is rotated at a certain angle between the second rotating shaft 304 and the connecting piece 305, so that the sealing door 201 can be smoothly opened. At the same time, the connecting piece 305 is rotated at a certain angle between the first rotating shaft 302 and the first rotating frame 301, thereby increasing the angle of opening of the sealing door 201 and ensuring that the sealing door 201 is completely opened. The operation is simple and flexible. The connecting piece 305 is arranged in a "U" shape structure, thereby improving the strength of the connecting piece 305 and ensuring stability. When the sealing door 201 is about to completely match the end of the sintering furnace body 1, the edge of the sealing door 201 first collides with the fixed frame 405. At this time, the edge of the sealing door 201 is in sliding fit with the inclined surface on the fixed frame 405. The fixed frame 405 is arranged in an "L" shape structure, thereby facilitating clamping and fixing of the edge of the sealing door 201. At the same time, one side of the fixed frame 405 in contact with the sealing door 201 is provided with an inclined surface. In the process of closing the sealing door 201, the "L" shape fixed frame 405 is driven to rotate outward, thereby not blocking the closing of the sealing door 201. The flexibility is high. The fixed frame 405 is driven to move outward, and the rotating frame 403 is driven to rotate at a certain angle around the third rotating shaft 402 on the mounting frame 401. When the sealing door 201 completely matches the end of the sintering furnace body 1, a torsional spring 404 is arranged between the end of the third rotating shaft 402 and the rotating frame 403, thereby facilitating the rotating frame 403 to drive the fixed frame 405 to rotate to the initial position. The end of the fixed frame 405 is located directly above the edge of the sealing door 201, thereby facilitating subsequent clamping and fixing of the sealing door 201 and improving flexibility. The rotating frame 403 is rotated to the initial position. The rotating frame 403 is arranged in a "U" shape structure, thereby facilitating installation of a motor 407. The operation is simple. At this time, the motor 407 drives a lead screw 408 to rotate at the center of the rotating frame 403. Since the lead screw 408 is in threaded connection with the rotating frame 403, the fixed frame 405 is driven to move away from the sealing door 201. Until the end of the fixed frame 405 is tightly matched with the edge of the sealing door 201, a limiting groove 406 is arranged at the edge of the sealing door 201, and the end of the fixed frame 405 is clamped with the limiting groove 406, thereby improving firmness. At the same time, the other two fixed frames 405 repeat the same operation. The handle 203 is arranged in a "U" shape structure, thereby facilitating grabbing. At this time, the three fixed frames 405 firmly fix the sealing door 201 on the sintering furnace body 1. A sealing ring 202 is arranged between the sealing door 201 and the sintering furnace body 1.The sintering furnace body 1 is sealed, firm and high in installation efficiency.

[0048] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A vacuum sintering apparatus for high coercivity NdFeB magnets, comprising a sintering furnace body (1), characterized in that: The sintering furnace body (1) is provided with a fixing structure (4), the fixing structure (4) includes a mounting frame (401), the end of the sintering furnace body (1) is fixedly connected with three mounting frames (401), two third rotating shafts (402) are rotatably connected to the mounting frame (401), a rotating frame (403) is rotatably connected between the two third rotating shafts (402), a fixing frame (405) is slidably connected to the rotating frame (403), the end of the fixing frame (405) is fixedly connected with a motor (407), a screw rod (408) is rotatably connected to the center position of the fixing frame (405), the end of the screw rod (408) is fixedly connected with the output shaft of the motor (407), the screw rod (408) is threadedly connected with the rotating frame (403), the sintering furnace body (1) is matched with a sealing structure (2), the sealing structure (2) includes a sealing door (201), and the end of the sintering furnace body (1) close to the mounting frame (401) is abutted with the sealing door (201).

2. The high-coercivity NdFeB magnetic steel vacuum sintering device according to claim 1, characterized in that: The two third rotating shafts (402) are symmetrically arranged, and a torsional spring (404) is fixedly connected between the end of one of the third rotating shafts (402) and the rotating frame (403).

3. The high-coercivity NdFeB magnetic steel vacuum sintering device according to claim 1, characterized in that: The fixing frame (405) is in the shape of "L", and the end of the fixing frame (405) is provided with an inclined surface.

4. The high-coercivity NdFeB magnetic steel vacuum sintering device according to claim 1, characterized in that: The mounting frame (401) is in the shape of "L", and the rotating frame (403) is in the shape of "U".

5. The high-coercivity NdFeB magnetic steel vacuum sintering device according to claim 1, characterized in that: The sealing door (201) is abutbed with a sealing ring (202) between the sealing door (201) and the sintering furnace body (1), and a handle (203) is fixedly connected to the outer side of the sealing door (201).

6. The high-coercivity NdFeB magnetic steel vacuum sintering device according to claim 5, characterized in that: The handle (203) is in the shape of "U", and a rotating structure (3) is connected to the sealing door (201).

7. The high-coercivity NdFeB magnetic steel vacuum sintering device according to claim 6, characterized in that: A limiting groove (406) is formed in the position of the sealing door (201) close to the fixing frame (405), and the fixing frame (405) is clamped in the limiting groove (406).

8. The high-coercivity NdFeB magnetic steel vacuum sintering device according to claim 6, characterized in that: The rotating structure (3) includes a first rotating frame (301), two first rotating frames (301) are fixedly connected to the end of the sintering furnace body (1) close to the sealing door (201), a first rotating shaft (302) is fixedly connected to the first rotating frame (301), a second rotating frame (303) is fixedly connected to the position of the sealing door (201) close to the first rotating frame (301), a second rotating shaft (304) is fixedly connected to the second rotating frame (303), and a connecting piece (305) is rotatably connected between the first rotating shaft (302) and the second rotating shaft (304).

9. The high-coercivity NdFeB magnetic steel vacuum sintering device according to claim 8, characterized in that: The two first rotating frames (301) are symmetrically arranged, and the connecting piece (305) is in the shape of "U".

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