Vacuum sintering furnace structure for samarium-cobalt permanent magnet

Abstract

The utility model discloses a kind of vacuum sintering furnace structures of samarium-cobalt permanent magnet, it is related to vacuum sintering technical field, and the utility model includes furnace body, the middle part of furnace body is provided with limiting mechanism, for speeding up the processing of samarium-cobalt permanent magnet, limiting mechanism includes: installation component includes the furnace door of rotation installation in one side of furnace body, one end of furnace body is rotationally installed with driven gear, after the furnace door is closed, driving motor starts, drive driving gear and driven gear meshing transmission, and then drive the synchronous rotation of the L-shaped limiting clamping block of annular array distribution, the L-shaped long side of limiting clamping block is immediately rotated into the locking side of corresponding clamping groove on furnace door, this process converts rotary motion into straight line compression force, to evenly compress furnace door on the sealing surface of furnace body, while ensuring that sealing pressure distribution is uniform, sealing reliability, replace traditional cumbersome manual locking rotation multiple locking bolts, greatly improve work efficiency and equipment automation degree.

Description

Technical Field

[0001] This utility model relates to the field of vacuum sintering technology, specifically to a vacuum sintering furnace structure for samarium cobalt permanent magnets. Background Technology

[0002] Samarium cobalt permanent magnets are widely used in aerospace, defense, and high-end medical devices due to their advantages such as high energy product, high coercivity and excellent high-temperature stability. Vacuum sintering furnaces are usually used for their production.

[0003] Reference patent document: Patent Publication No. CN221223327U, Patent Publication Date 2024-06-25, discloses an auxiliary support structure for a vacuum sintering furnace. The furnace body is a cylindrical structure with a horizontal axis and an open side with a door. It includes a vacuum system and a cooling fan. The cooling fan is connected to the furnace body through a cooling pipe, and the cooling pipe is connected in series with a radiator. It also includes a tray for holding the metal to be sintered. The tray has a support device between it and the inner wall of the furnace body for pulling out or inserting a heater on the open side of the furnace body. The heater corresponds to the open side of the furnace body. The tray is horizontally fitted onto the heater and is suspended in the air. It is supported by the support device. The support device not only provides stable support but also allows the tray to move in or out of the heating zone, facilitating loading and unloading.

[0004] Based on the search of patent numbers and the shortcomings of existing technologies, the following was found:

[0005] In existing vacuum sintering furnaces, the furnace door is usually sealed manually using multiple circumferentially distributed bolts. This locking method requires operators to tighten multiple bolts one by one to achieve a seal, making the manual operation process cumbersome. Each opening and closing of the furnace door takes a long time, which can easily affect the production rhythm and is difficult to adapt to the needs of automated production lines. Furthermore, uneven distribution of locking force can easily lead to excessive local stress on the furnace door, causing deformation, sealing failure, and insufficient vacuum. In addition, when feeding samarium cobalt permanent magnet materials, the carrier platform and the track mostly have sliding friction, resulting in high conveying resistance and easy jamming. During the sintering process, the thermal stress generated by the drastic temperature changes inside the furnace and the vibration of the equipment can easily cause the carrier platform to shift, causing the samarium cobalt permanent magnet to deviate from the preset heating area, which can easily lead to uneven heating.

[0006] Therefore, this utility model provides a vacuum sintering furnace structure for samarium cobalt permanent magnets. Utility Model Content

[0007] To address the problems of cumbersome and inefficient manual bolt locking of existing vacuum sintering furnace doors, as well as inaccurate positioning and easy deviation of the conveyor platform, the purpose of this utility model is to provide a vacuum sintering furnace structure for samarium cobalt permanent magnets.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a vacuum sintering furnace structure for samarium cobalt permanent magnets, comprising a furnace body, wherein a limiting mechanism is provided in the middle of the furnace body to accelerate the processing of samarium cobalt permanent magnets, the limiting mechanism comprising:

[0009] The mounting components include a furnace door that is rotatably mounted on one side of the furnace body, a driven gear that is rotatably mounted on one end of the furnace body, a number of limit blocks arranged in a ring array that are fixedly mounted on the middle of one side of the driven gear, a driving gear that is provided on one side of the driven gear, the driving gear and the driven gear meshing with each other, and a drive component that is provided on one side of the driving gear.

[0010] A fixing component, located inside the furnace body, is used to limit the position of the support device that holds the samarium cobalt permanent magnet material.

[0011] Preferably, the fixing assembly includes two fixed rails fixedly installed in the middle of the furnace body. Multiple equally spaced mounting brackets are provided on the upper part of the fixed rails. A rotating roller is rotatably installed in the middle of the middle of each of the multiple mounting brackets. Two symmetrically distributed limiting springs are fixedly installed at the bottom center of each of the two sets of mounting brackets. The bottom ends of the multiple limiting springs are fixedly installed at the lower ends of both ends of the fixed rails. A support platform is provided in the middle of the furnace body. Two symmetrically distributed guide rails are fixedly installed at the bottom of the support platform. The bottom ends of the two guide rails are in contact with the upper surface of the rotating roller.

[0012] Preferably, the drive assembly includes a drive motor fixedly mounted on one side of the furnace body, and a drive gear fixedly mounted on the drive end of the drive motor.

[0013] Preferably, one side of the furnace door has multiple slots arranged in a circular array, and multiple limiting blocks are slidably engaged inside the slots.

[0014] Preferably, two symmetrically distributed telescopic rods are fixedly installed at the lower ends of both ends of the two fixed tracks, and the top ends of the multiple telescopic rods are fixedly installed at the bottom of the mounting frame.

[0015] Preferably, both ends of the two guide rails are provided with fixing grooves, and the rotating roller is slidably locked inside the fixing grooves.

[0016] Beneficial effects

[0017] This invention provides a vacuum sintering furnace structure for samarium cobalt permanent magnets. Compared with the prior art, it has the following advantages:

[0018] 1. When the furnace door is closed, the drive motor starts, which drives the active gear and the driven gear to mesh and transmit power. This drives the L-shaped limit blocks arranged in a ring array to rotate synchronously. The long side of the L-shape of the limit block is then screwed into the locking side of the corresponding slot on the furnace door. This process converts the rotational motion into linear pressing force, thereby pressing the furnace door evenly against the sealing surface of the furnace body. While ensuring uniform sealing pressure distribution and sealing reliability, it replaces the traditional cumbersome manual locking and turning of multiple locking bolts, greatly improving work efficiency and equipment automation.

[0019] 2. In this application, the support platform slides smoothly into the furnace body on the rotating roller via the bottom guide rail. When it moves to the working position, the limiting springs at the bottom of the sliding mounting brackets at both ends push the rotating roller upward under the action of the restoring force, which just fits into the fixed groove at the bottom of the guide rail. This allows the support platform to complete the constraint of all its horizontal degrees of freedom at the moment it is in place, forming a stable and reliable mechanical interlock. This effectively prevents the support platform from shifting due to thermal stress or vibration during the sintering process, and ensures the uniformity of the heating environment of the samarium cobalt permanent magnet material. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is another structural schematic diagram of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure after the installation components are disassembled in this utility model.

[0023] Figure 4 This is a cross-sectional structural diagram of the fixing component of this utility model.

[0024] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle.

[0025] In the diagram: 1. Furnace body; 2. Limiting mechanism; 21. Mounting assembly; 211. Furnace door; 212. Drive motor; 213. Drive gear; 214. Driven gear; 215. Limiting block; 216. Slot; 22. Fixing assembly; 221. Support platform; 222. Fixing rail; 223. Limiting spring; 224. Telescopic rod; 225. Mounting bracket; 226. Rotating roller; 227. Guide rail; 228. Fixing groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 This utility model provides a technical solution: a vacuum sintering furnace structure for samarium cobalt permanent magnets, including a furnace body 1, with a limiting mechanism 2 provided in the middle of the furnace body 1 to accelerate the processing of samarium cobalt permanent magnets. The limiting mechanism 2 includes:

[0028] Mounting assembly 21 includes a furnace door 211 rotatably mounted on one side of the furnace body 1. A driven gear 214 is rotatably mounted on one end of the furnace body 1. Multiple limit blocks 215 arranged in a circular array are fixedly mounted on the middle of one side of the driven gear 214. The number of limit blocks 215 is set to 6 to 8 to ensure uniform and stable limiting of the furnace door 211 and avoid excessive local force that could cause deformation of the furnace door 211. The limit blocks 215 have an L-shaped structure, and a drive tooth is provided on one side of the driven gear 214. Wheel 213, drive gear 213 and driven gear 214 mesh with each other. A drive assembly is provided on one side of drive gear 213. When the furnace door 211 and furnace body 1 are closed, the limiting block 215 enters the slot 216. By rotating driven gear 214, the limiting block 215 can be driven to rotate, which in turn drives the limiting block 215 installed on one side to rotate, so that the long side of the L-shaped limiting block 215 is inserted into one end of slot 216, thereby completing the fixation.

[0029] The fixing component 22 is located inside the furnace body 1 and is used to limit the support device for placing the samarium cobalt permanent magnet material.

[0030] The fixing assembly 22 includes two fixed rails 222 fixedly installed in the middle of the furnace body 1. Multiple equally spaced mounting brackets 225 are provided on the upper part of the fixed rails 222. The mounting brackets 225 located in the middle of the two fixed rails 222 are fixedly installed, while one mounting bracket 225 located at each end of the two fixed rails 222 is slidably engaged with the fixed rail 222. Rotating rollers 226 are rotatably installed in the middle of the multiple mounting brackets 225. Two symmetrically distributed limiting springs 223 are fixedly installed at the bottom center of each set of mounting brackets 225. The mounting bracket 225 is slidably mounted on the fixed track 222. The bottom ends of multiple limit springs 223 are fixedly mounted on the lower ends of the fixed track 222. A support platform 221 is provided in the middle of the furnace body 1. Two symmetrically distributed guide rails 227 are fixedly mounted on the bottom end of the support platform 221. The bottom ends of the two guide rails 227 are in contact with the upper surface of the rotating roller 226. When feeding, the support platform 221 loaded with material is pushed by the feeding car, so that when it is conveyed inward, it can stably slide into the furnace body 1 by contacting the upper surface of the rotating roller 226.

[0031] The drive assembly includes a drive motor 212 fixedly installed on one side of the furnace body 1, and a drive gear 213 fixedly installed on the drive end of the drive motor 212. Under the drive of the drive motor 212, the drive gear 213 can be driven to rotate, thereby enabling the meshed driven gear 214 to rotate.

[0032] The furnace door 211 has multiple slots 216 arranged in a ring array on one side. Multiple limiting blocks 215 are slidably locked inside the slots 216. One side of the slot 216 is the same size as the limiting block 215, while the other side can only allow the long L-shaped side of the limiting block 215 to enter and lock into its interior.

[0033] Two symmetrically distributed telescopic rods 224 are fixedly installed at the lower ends of both ends of the two fixed rails 222. The top ends of the multiple telescopic rods 224 are fixedly installed at the bottom of the mounting frame 225. The limiting springs 223 are sleeved on the outside of the telescopic rods 224. The installation of the telescopic rods 224 can limit and support the mounting frame 225, making it more stable when it moves.

[0034] Both ends of the two guide rails 227 are provided with fixing grooves 228. The rotating roller 226 is slidably locked inside the fixing groove 228. When the support platform 221 is fully inserted into the furnace body 1, the rotating roller 226, which is telescopic at both ends, is located just below the fixing groove 228. At this time, the force of the limiting spring 223 can make the rotating roller 226 move upward and lock into the fixing groove 228, thereby limiting and fixing the support platform 221.

[0035] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0036] During operation, the support platform 221 loaded with samarium cobalt permanent magnet blanks is first pushed into the furnace body 1 by an external loading trolley. The guide rail 227 at the bottom of the support platform 221 contacts the rotating roller 226 on the upper part of the fixed rail 222. By using the rolling of the rotating roller 226, the support platform 221 can be easily and smoothly transported to the designated position inside the furnace body 1. When the support platform 221 is fully pushed into the working position inside the furnace body 1, the fixing grooves 228 at both ends of the two guide rails 227 at the bottom move exactly above the movable rotating roller 226. At this time, under the restoring force of the limit spring 223 which is always in a compressed state, the mounting bracket 225 at the top moves upward, and the rotating roller 226 on the mounting bracket 225 rises accordingly, accurately locking into the fixing groove 228 at the bottom of the guide rail 227, thereby effectively restricting the degree of freedom of movement of the support platform 221 in any horizontal direction and firmly locking it in the predetermined position.

[0037] Push the furnace door 211 to close it with the opening of the furnace body 1. At this time, the ends of multiple L-shaped limiting blocks 215 installed on the driven gear 214 are inserted into the corresponding slots 216 on the furnace door 211. Start the drive motor 212 to drive the drive gear 213 to rotate, which in turn drives the driven gear 214 to rotate. The rotation of the driven gear 214 drives all the L-shaped limiting blocks 215 to rotate synchronously, so that the long side of the L-shape of each limiting block 215 is screwed into the locking side of the slot 216. Through this rotation action, the furnace door 211 is pressed tightly against the sealing surface of the furnace body 1. The locking force is applied evenly by multiple limiting blocks 215, ensuring the reliability and stability of the sealing of the furnace door 211 in the high temperature and high vacuum environment, and effectively preventing deformation caused by excessive local stress.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum sintering furnace structure for samarium cobalt permanent magnets, comprising a furnace body (1), characterized in that: A limiting mechanism (2) is provided in the middle of the furnace body (1) to accelerate the processing of samarium cobalt permanent magnets. The limiting mechanism (2) includes: The mounting assembly (21) includes a furnace door (211) rotatably mounted on one side of the furnace body (1), a driven gear (214) rotatably mounted on one end of the furnace body (1), a plurality of limit blocks (215) arranged in a ring array fixedly mounted on the middle of one side of the driven gear (214), a drive gear (213) is provided on one side of the driven gear (214), the drive gear (213) and the driven gear (214) mesh with each other, and a drive assembly is provided on one side of the drive gear (213). A fixing component (22) is installed inside the furnace body (1) to limit the position of the support device for placing the samarium cobalt permanent magnet material.

2. The vacuum sintering furnace structure for samarium cobalt permanent magnets according to claim 1, characterized in that: The fixing component (22) includes two fixed rails (222) fixedly installed in the middle of the furnace body (1). Multiple equally spaced mounting brackets (225) are provided on the upper part of the fixed rails (222). Rotating rollers (226) are rotatably installed in the middle of the multiple mounting brackets (225). Two symmetrically distributed limiting springs (223) are fixedly installed in the middle of the bottom end of each of the two sets of mounting brackets (225). The bottom ends of the multiple limiting springs (223) are fixedly installed in the lower part of both ends of the fixed rails (222). A support platform (221) is provided in the middle of the furnace body (1). Two symmetrically distributed guide rails (227) are fixedly installed in the bottom end of the support platform (221). The bottom ends of the two guide rails (227) are in contact with the upper surface of the rotating rollers (226).

3. The vacuum sintering furnace structure for samarium cobalt permanent magnets according to claim 1, characterized in that: The drive assembly includes a drive motor (212) fixedly installed on one side of the furnace body (1), and a drive gear (213) fixedly installed on the drive end of the drive motor (212).

4. The vacuum sintering furnace structure for samarium cobalt permanent magnets according to claim 1, characterized in that: The furnace door (211) has multiple ring-shaped slots (216) on one side, and multiple limiting blocks (215) are slidably locked inside the slots (216).

5. The vacuum sintering furnace structure for samarium-cobalt permanent magnets according to claim 2, characterized in that: Two symmetrically distributed telescopic rods (224) are fixedly installed at the lower ends of both ends of the two fixed tracks (222), and the top ends of the multiple telescopic rods (224) are fixedly installed at the bottom of the mounting frame (225).

6. The vacuum sintering furnace structure for samarium cobalt permanent magnets according to claim 2, characterized in that: The two guide rails (227) are provided with fixed grooves (228) at the lower ends, and the rotating roller (226) is slidably locked inside the fixed grooves (228).

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