Vacuum induction cooker smelting device for neodymium iron boron sintering

Abstract

The utility model relates to the technical field of magnet sintering, in particular to a vacuum induction cooker smelting device for neodymium iron boron sintering, which comprises a vacuum induction cooker body, the vacuum induction cooker body is a main body of the smelting device, and a plurality of supports are fixedly mounted at the bottom of the vacuum induction cooker body. The support is used for stably supporting the vacuum induction cooker body, a hinge seat is fixedly arranged on one side of a feeding port of the vacuum induction cooker body, and an oven door is rotatably installed on the hinge seat and can be in butt joint with the feeding port of the vacuum induction cooker body in a sealed and embedded mode. According to the utility model, the track is matched with the material rack moving wheel, so that the material rack can accurately slide into the furnace, the friction or collision with the inner wall of the hearth is avoided, the feeding stability is improved, and in the pushing process of the material rack, the moving wheel downwards presses the wedge-shaped block and the wedge-shaped block is reset, bounced and locked by the spring, the fixity of the material rack in the furnace is enhanced, and the deviation caused by vibration is prevented.

Description

Technical Field

[0001] This utility model relates to the field of magnet sintering technology, and in particular to a vacuum induction furnace smelting device for NdFeB sintering. Background Technology

[0002] Neodymium iron boron (NdFeB) permanent magnets are widely used in various high-tech fields, such as electronics, information technology, the automotive industry, and medical devices, due to their superior magnetic properties. In their production, sintering is a crucial step, determining the density, microstructure, and magnetic properties of the final product. The vacuum induction furnace smelting unit, as the core equipment for NdFeB sintering, completes the densification and grain boundary diffusion processes of the billet under high temperature and strictly controlled vacuum conditions.

[0003] However, traditional vacuum induction furnace smelting equipment for NdFeB sintering faces significant technical challenges in material loading and securing. First, the racks holding the billets are bulky and lack self-movement capabilities, requiring forklifts or hydraulic handling equipment for transport. This not only increases operational steps but also raises labor intensity and safety risks. Second, the alignment precision between the trolley and the furnace body during feeding is extremely high. Any slight deviation can cause material jamming or collision with the furnace wall, affecting the equipment's lifespan and maintenance costs. These issues limit production efficiency and challenge product quality consistency. Therefore, we propose a vacuum induction furnace smelting device for NdFeB sintering to improve existing vacuum induction furnace smelting equipment and achieve more efficient and safer material loading and unloading. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a vacuum induction furnace smelting device for NdFeB sintering.

[0005] The technical implementation scheme of this utility model is as follows: a vacuum induction furnace smelting device for NdFeB sintering, comprising a vacuum induction furnace body, a support frame, and a furnace door. The vacuum induction furnace body is the main body of this smelting device. Multiple supports are fixedly installed at the bottom of the vacuum induction furnace body for stable support. A hinge seat is fixedly provided on one side of the feed inlet of the vacuum induction furnace body, and a furnace door is rotatably installed on the hinge seat. The furnace door can be sealed and fitted to the feed inlet of the vacuum induction furnace body. It also includes a material rack, moving wheels, a track, a wedge block, and a guide rod. Two parallel tracks are symmetrically fixed at the bottom of the inner wall of the vacuum induction cooker body. A material rack is slidably mounted on the tracks. The side of the track facing the material inlet of the vacuum induction cooker body has an opening for the material rack. Two sets of moving wheels are rotatably mounted at the bottom of the material rack. Each set of moving wheels has no less than two wheels. The two sets of moving wheels are respectively slidably adapted to the two tracks. A wedge block is slidably installed on the track near the moving wheel on the material rack. A spring is set between the track and the wedge block. The number of wedge blocks is the same as the number of moving wheels on the material rack. The inclined surface of the wedge block faces the opening of the track.

[0006] Furthermore, a mounting plate is fixedly connected to the bottom outer wall of the vacuum induction cooker body, and a second guide rod is fixedly connected to the mounting plate. The second guide rod is sealed and fixedly inserted into the vacuum induction cooker body. A contact plate is slidably mounted on the second guide rod. The contact plates are located above the wedge block and are in contact with each other. A driving component for driving the contact plates is provided on the mounting plate.

[0007] Furthermore, the driving component includes a motor and a lead screw. The motor is fixedly mounted on the mounting plate, and the lead screw is fixedly connected to the output shaft of the motor. The lead screw rotates through the bottom of the outer shell of the vacuum induction cooker body, and the lead screw and the contact plate are threaded together.

[0008] Furthermore, the section of the lead screw that penetrates the outer shell of the vacuum induction cooker body is not threaded, and the unthreaded section of the lead screw is fitted with a sealing sleeve, which seals and covers the connection between the lead screw and the outer shell of the vacuum induction cooker body.

[0009] Furthermore, a fixed rod is fixedly connected to the side of the furnace door away from the hinge seat, a sliding rod is slidably sleeved on the fixed rod, a spring is provided between the fixed rod and the sliding rod, and a locking element for locking the sliding rod is provided on the outer shell of the vacuum induction cooker body.

[0010] Furthermore, the locking component includes a fixing plate and a wedge-shaped frame. The fixing plate is fixedly connected to the outer shell of the vacuum induction cooker body on the side away from the feed port of the receiving seat. The wedge-shaped frame is fixedly installed on the fixing plate. One side of the wedge-shaped frame is a bevel, and the other side of the wedge-shaped frame is perpendicular to the fixing plate. The sliding rod can stretch the spring on the fixing rod and lock it to the wedge-shaped frame on the fixing plate.

[0011] This utility model has the following advantages:

[0012] 1. This utility model ensures that the material rack slides accurately into the furnace by cooperating with the track and the moving wheels of the material rack, avoiding friction or collision with the inner wall of the furnace and improving the stability of feeding. During the process of pushing the material rack in, the moving wheels press down on the wedge block and are reset and locked by the spring, which enhances the fixation of the material rack in the furnace and prevents it from shifting due to vibration.

[0013] 2. This utility model can control the contact plate to press down on the wedge block through the cooperation of a motor and a lead screw, so as to quickly release the lock, facilitate the loading and unloading of the material rack, and make the operation efficient and convenient.

[0014] 3. This utility model also features a furnace door with a locking structure consisting of a fixed rod, a sliding rod, and a spring. The sliding rod and wedge-shaped frame are fastened together, making the operation simple and the locking secure. This makes the furnace door more stable when closed, improving the convenience and safety of the equipment. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the material rack pushed into the body of the vacuum induction cooker of this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the material rack and moving wheels of this utility model.

[0018] Figure 4 This is a cross-sectional view of the sliding track for the moving wheels on the material rack of this utility model.

[0019] Figure 5 This is a schematic diagram showing the relationship between the track, wedge block, motor, sealing sleeve and lead screw of this utility model.

[0020] Figure 6 This is an exploded view of the fixed rod, sliding rod, and spring of this utility model.

[0021] In the attached diagrams: 1: Vacuum induction cooker body, 101: Support, 102: Hinge seat, 2: Furnace door, 3: Material rack, 4: Moving wheel, 5: Track, 6: Wedge block, 61: Contact plate, 7: Guide rod one, 8: Spring one, 9: Guide rod two, 91: Mounting plate, 10: Motor, 11: Sealing sleeve, 12: Lead screw, 13: Fixing rod, 14: Sliding rod, 15: Spring three, 16: Fixing plate, 17: Wedge frame. Detailed Implementation

[0022] 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.

[0023] A vacuum induction furnace smelting apparatus for NdFeB sintering, such as Figures 1-6 As shown, the apparatus includes a vacuum induction cooker body 1, a support bracket 101, and a furnace door 2. The vacuum induction cooker body 1 is the main body of this smelting device. Multiple supports 101 are fixedly installed at the bottom of the vacuum induction cooker body 1 to stably support it. A hinge seat 102 is fixedly installed on one side of the feed inlet of the vacuum induction cooker body 1, and the furnace door 2 is rotatably mounted on the hinge seat 102. The furnace door 2 can seal and fit into the feed inlet of the vacuum induction cooker body 1. The apparatus also includes a material rack 3, moving wheels 4, tracks 5, wedge blocks 6, and guide rods 7. Two parallel tracks 5 are symmetrically fixedly installed on the bottom inner wall of the vacuum induction cooker body 1. The material rack 3 is slidably mounted on the tracks 5. The side of the tracks 5 facing the feed inlet of the vacuum induction cooker body 1 has an opening for the material rack 3. Two sets of moving wheels 4 are rotatably mounted on the bottom of the material rack 3. 4. There are at least two sets of moving wheels 4, each slidingly adapted to two tracks 5. A wedge block 6 is slidably installed on the track 5 near the moving wheel 4 on the material rack 3. A spring 8 is provided between the track 5 and the wedge block 6. The number of wedge blocks 6 is the same as the number of moving wheels 4 on the material rack 3. The inclined surface of the wedge block 6 faces the opening of the track 5. The moving wheel 4 of the material rack 3 aligns with and pushes it into the track 5 inside the vacuum induction cooker body 1, so that the material rack 3 can slide smoothly and accurately into the vacuum induction cooker body 1 along the track 5. This avoids the material rack 3 from deviating and rubbing against the inner wall of the furnace chamber of the vacuum induction cooker body 1. During the process of correctly pushing the material rack 3 into the vacuum induction cooker body 1, the moving wheel 4 of the material rack 3 will overcome the elastic force of the spring 8 and directly press down on the wedge block 6. After the moving wheel 4 of the material rack 3 passes, it will be locked by the bounced wedge block 6, which improves the stability of the material rack 3 inside the vacuum induction cooker body 1.

[0024] like Figure 2 and Figure 4 As shown, a mounting plate 91 is fixedly connected to the bottom outer wall of the vacuum induction cooker body 1. A guide rod 9 is fixedly connected to the mounting plate 91. The guide rod 9 is sealed and fixedly penetrates into the vacuum induction cooker body 1. A contact plate 61 is slidably installed on the guide rod 9. The contact plate 61 is located above the wedge block 6 and is in contact with each other. A driving component for driving the contact plate 61 is provided on the mounting plate 91.

[0025] like Figure 4 and Figure 5 As shown, the driving component includes a motor 10 and a lead screw 12. The motor 10 is fixedly mounted on the mounting plate 91, and the lead screw 12 is fixedly connected to the output shaft of the motor 10. The lead screw 12 rotates through the bottom of the outer shell of the vacuum induction cooker body 1. The lead screw 12 and the contact plate 61 are threaded together. The motor 10 drives the contact plate 61 to move up and down through the lead screw 12, so that the contact plate 61 can overcome the elastic force of the spring 8 and press down on the wedge block 6, so that the wedge block 6 can release the track 5 from locking the moving wheel 4 on the material rack 3.

[0026] like Figure 5 As shown, the section of the lead screw 12 that penetrates the outer shell of the vacuum induction cooker body 1 is not threaded. The section of the lead screw 12 without threads is provided with a sealing sleeve 11, which seals and covers the connection between the lead screw 12 and the outer shell of the vacuum induction cooker body 1.

[0027] like Figure 1 and Figure 2 As shown, a fixed rod 13 is fixedly connected to the side of the furnace door 2 away from the hinge seat 102. A sliding rod 14 is slidably sleeved on the fixed rod 13. A spring 15 is provided between the fixed rod 13 and the sliding rod 14. A locking element for locking the sliding rod 14 is provided on the outer shell of the vacuum induction cooker body 1. The locking element can lock the sliding rod 14, thereby improving the stability of the furnace door 2 on the vacuum induction cooker body 1 when closed.

[0028] like Figure 1 and Figure 6 As shown, the locking component includes a fixing plate 16 and a wedge-shaped bracket 17. The fixing plate 16 is fixedly connected to the outer shell of the vacuum induction cooker body 1 on the side away from the feed port of the receiving seat. The wedge-shaped bracket 17 is fixedly installed on the fixing plate 16. One side of the wedge-shaped bracket 17 is a bevel, and the other side of the wedge-shaped bracket 17 is perpendicular to the fixing plate 16. The sliding rod 14 can stretch the spring 15 on the fixing rod 13 and lock it to the wedge-shaped bracket 17 on the fixing plate 16.

[0029] When smelting is required, the operator first pushes the material rack 3, loaded with materials, into the vacuum induction furnace body 1 along the track 5 using the moving wheels 4. During the movement of the material rack 3, the moving wheels 4 at the bottom of the material rack 3 will contact the wedge block 6 on the track 5, compressing the spring 8 through the inclined plane, causing the wedge block 6 to temporarily move downwards. When the moving wheels 4 are fully pushed into the guide rail, the wedge block 6 bounces back under the action of the spring 8, locking the edge of the moving wheels 4 to form a mechanical lock, ensuring that the material rack 3 is accurately positioned in the furnace without the risk of displacement. Then, the furnace door 2 is closed, and the sliding rod 14 is pulled to slide past the inclined side of the wedge frame 17 on the fixed plate 16, finally engaging with the connecting slot between the fixed plate 16 and the wedge frame 17, utilizing the wedge structure to... The locking feature ensures the sealing of the furnace door 2, and in conjunction with the vacuum system, maintains a negative pressure environment inside the furnace. During the smelting process, the vacuum induction furnace body 1 performs high-temperature sintering of neodymium iron boron material through electromagnetic induction heating. When the material rack 3 needs to be removed after completion, the motor 10 on the mounting plate 91 is started to drive the lead screw 12 to rotate. The lead screw 12 drives the contact plate 61 to press down all the wedge blocks 6 along the guide rod 2 9, so that the wedge blocks 6 compress the spring 1 8 and then disengage from the lock on the moving wheel 4 on the material rack 3. At this time, the material rack 3 can be smoothly pulled out along the track 5. During the process, the sealing sleeve 11 without the threaded section of the lead screw 12 always maintains the sealing between the vacuum furnace body and the outside world. Thus, through the combination of mechanical locking and electronic unlocking, the stability during smelting is ensured, and efficient loading and unloading of materials can be achieved.

[0030] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A vacuum induction furnace smelting apparatus for NdFeB sintering, comprising a vacuum induction furnace body (1), a bracket (101) and a furnace door (2), wherein a plurality of brackets (101) are fixedly installed at the bottom of the vacuum induction furnace body (1), and a hinge seat (102) is fixedly provided on one side of the feed inlet of the vacuum induction furnace body (1), and the furnace door (2) is rotatably installed on the hinge seat (102); Its characteristics are, It also includes a material rack (3), moving wheels (4), rails (5), wedge blocks (6) and guide rod 1 (7). Two parallel rails (5) are symmetrically fixed at the bottom of the inner wall of the vacuum induction cooker body (1). The material rack (3) is slidably connected to the rails (5). The side of the rails (5) facing the feed port of the vacuum induction cooker body (1) is the opening for connecting the material rack (3). Two sets of moving wheels (4) are rotatably installed at the bottom of the material rack (3). Each set of moving wheels (4) has no less than two. The two sets of moving wheels (4) are slidably adapted to the two rails (5). A wedge block (6) is slidably installed at the position of the moving wheel (4) on the rail (5) near the material rack (3). A spring 1 (8) is provided between the rail (5) and the wedge block (6). The number of wedge blocks (6) is the same as the number of moving wheels (4) of the material rack (3). The inclined surface of the wedge block (6) faces the opening of the rail (5).

2. The vacuum induction furnace smelting apparatus for NdFeB sintering according to claim 1, characterized in that, A mounting plate (91) is fixedly connected to the bottom outer wall of the vacuum induction cooker body (1). A guide rod (9) is fixedly connected to the mounting plate (91). The guide rod (9) is sealed and fixedly penetrates into the vacuum induction cooker body (1). A contact plate (61) is slidably installed on the guide rod (9). The contact plate (61) is located above the wedge block (6) and is in contact with each other. A driving component for driving the contact plate (61) is provided on the mounting plate (91).

3. The vacuum induction furnace smelting apparatus for NdFeB sintering according to claim 2, characterized in that, The driving component includes a motor (10) and a lead screw (12). The motor (10) is fixedly mounted on the mounting plate (91). The lead screw (12) is fixedly connected to the output shaft of the motor (10). The lead screw (12) rotates through the bottom of the outer shell of the vacuum induction cooker body (1). The lead screw (12) and the contact plate (61) are threaded together.

4. A vacuum induction furnace smelting apparatus for NdFeB sintering according to claim 3, characterized in that, The lead screw (12) has no threads at the section that passes through the outer shell of the vacuum induction cooker body (1). The section of the lead screw (12) without threads is provided with a sealing sleeve (11). The sealing sleeve (11) seals and covers the connection between the lead screw (12) and the outer shell of the vacuum induction cooker body (1).

5. A vacuum induction furnace smelting apparatus for NdFeB sintering according to claim 4, characterized in that, A fixed rod (13) is fixedly connected to the side of the furnace door (2) away from the hinge seat (102). A sliding rod (14) is slidably sleeved on the fixed rod (13). A spring (15) is provided between the fixed rod (13) and the sliding rod (14). A locking element for locking the sliding rod (14) is provided on the outer shell of the vacuum induction cooker body (1).

6. A vacuum induction furnace smelting apparatus for NdFeB sintering according to claim 5, characterized in that, The locking component includes a fixing plate (16) and a wedge-shaped bracket (17). The fixing plate (16) is fixedly connected to the outer shell of the vacuum induction cooker body (1) on the side away from the feed port of the receiving seat. The wedge-shaped bracket (17) is fixedly installed on the fixing plate (16). One side of the wedge-shaped bracket (17) is a slanted side, and the other side of the wedge-shaped bracket (17) is perpendicular to the fixing plate (16).

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