Vacuum sintering furnace based on sintered neodymium iron boron

Abstract

The utility model relates to the field of neodymium iron boron production, and discloses a vacuum sintering furnace based on sintered neodymium iron boron, which comprises a vacuum sintering furnace main body and a PLC (programmable logic controller), a sintering chamber is arranged in the vacuum sintering furnace main body, six groups of heating plates are fixedly mounted in the sintering chamber, temperature sensors are fixedly mounted on the heating plates, and the temperature sensors are connected with the PLC. A cooling chamber is arranged between the sintering chamber and the vacuum sintering furnace body, a cooling water pipe is fixedly installed in the cooling chamber, and a heat insulation layer is fixedly connected to the outer portion of the cooling chamber. According to the vacuum sintering furnace based on sintered neodymium iron boron, the hydraulic cylinder drives the discharging frame to go deep into the vacuum sintering furnace body to start vacuum sintering, the furnace cover is opened after sintering and cooling are completed, the hydraulic cylinder can push the sliding block forwards, and the sliding block drives the discharging frame to move towards the outlet till a forklift conveniently forks the discharging frame. The problem that discharging is inconvenient is solved.

Description

Technical Field

[0001] This utility model relates to the field of neodymium iron boron production technology, specifically to a vacuum sintering furnace based on sintered neodymium iron boron. Background Technology

[0002] Neodymium iron boron (NdFeB) magnets, also known as neodymium iron boron magnets, are tetragonal crystals formed by neodymium, iron, and boron. These magnets are the second strongest permanent magnets in terms of magnetic properties after holmium magnets at absolute zero, and are also the most commonly used rare-earth magnets. NdFeB magnets are widely used in electronic products.

[0003] Neodymium iron boron (NdFeB) requires sintering in a sintering furnace during production. A vacuum sintering furnace is a furnace that performs protective sintering of heated items in a vacuum environment. Currently, common vacuum sintering furnaces have relatively simple heating methods, and the heating plates inside the furnace cannot be heated in sections. This makes it inconvenient to flexibly adjust the sintering temperature of each area according to the sintering requirements, which can easily lead to uneven temperature and under-sintering.

[0004] There is an urgent need for a vacuum sintering furnace based on sintered NdFeB to address the technical deficiencies mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum sintering furnace based on sintered NdFeB to solve the problem of inconvenient material unloading mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vacuum sintering furnace based on sintered NdFeB magnets, comprising a vacuum sintering furnace body and a PLC controller. The vacuum sintering furnace body has a sintering chamber inside, and six sets of heating plates are fixedly installed inside the sintering chamber. Temperature sensors are fixedly installed on the heating plates. A cooling chamber is provided between the sintering chamber and the vacuum sintering furnace body. Cooling water pipes are fixedly installed inside the cooling chamber. A heat insulation layer is fixedly connected to the outside of the cooling chamber. Protective plates are detachably installed on both sides of the vacuum sintering furnace body. A vacuum pump is installed on the right side of the main body. The vacuum sintering furnace body is fixedly connected to the outside via a connecting pipe. The vacuum pump is fixedly connected to the connecting pipe through a pipeline. A feeding rack is placed inside the vacuum sintering furnace body. Three sets of feeding slides are fixedly connected inside the vacuum sintering furnace body. A hydraulic cylinder is fixedly installed at the rear end of the feeding slide. A slider is fixedly connected to the output end of the hydraulic cylinder. A mounting base is fixedly connected to the top of the slider. Mounting rods are fixedly connected to both sides and the bottom of the feeding rack. Mounting plates are fixedly connected to the top and bottom of the protective plate. Mounting bolts are provided on the mounting plates.

[0007] As a further technical solution of this utility model, the hydraulic cylinder is provided in three sets, the hydraulic cylinder is electrically connected to the synchronous drive module inside the PLC controller, and the hydraulic cylinder is provided with a high temperature resistant protective structure.

[0008] As a further technical solution of this utility model, the slider is slidably connected inside the feeding slide, and the mounting rod is inserted inside the mounting base.

[0009] As a further technical solution of this utility model, the heating plate adopts an electric heating structure, and the temperature sensor is electrically connected to the PLC controller.

[0010] As a further technical solution of this utility model, the cooling water pipe is connected to an external pump body, and the mounting bolts are installed on the outside of the vacuum sintering furnace body.

[0011] As a further technical solution of this utility model, a heat insulation pad is fixedly connected to the outside of the protective plate, and the protective plate is arc-shaped and attached to the outside of the vacuum sintering furnace body.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the vacuum sintering furnace based on sintered NdFeB not only realizes the function of easy unloading and enhanced protection, but also realizes the function of zoned temperature control;

[0013] (1) By setting up a feeding rack, mounting base, feeding slide, hydraulic cylinder, slider and mounting rod, neodymium iron boron can be placed on the feeding rack. The hydraulic cylinder drives the feeding rack to go deep into the interior of the vacuum sintering furnace body to start vacuum sintering. After sintering and cooling, the furnace cover is opened and the hydraulic cylinder can push the slider forward. The slider drives the feeding rack to move towards the outlet until it is easy for a forklift to lift the feeding rack. After the feeding rack rises, the mounting rod at the bottom is disengaged from the mounting base to realize unloading. This structure realizes the function of easy unloading.

[0014] (2) By setting up a heat insulation layer, a protective plate, a heat insulation pad, a mounting plate and mounting bolts, the heat insulation layer inside the vacuum sintering furnace body can reduce heat loss and prevent a large amount of heat from being conducted to the outer wall of the vacuum sintering furnace body during the sintering heating process. When in use, the protective plate can protect the easily accessible areas on both sides of the vacuum sintering furnace body. The protective cover composed of the protective plate and the heat insulation pad can prevent workers from being burned when touching the outer wall of the vacuum sintering furnace body. The protective plate can be disassembled and removed by unscrewing the mounting bolts. This structure realizes the function of easy enhancement of protection.

[0015] (3) By setting up a sintering chamber, heating plates, temperature sensors and PLC controller, six sets of heating plates are distributed in a ring inside the sintering chamber. Each set of heating plates can be heated independently. The PLC controller and temperature sensors can independently control the temperature of each set of heating plates. By zoning heating, the uniformity of sintering temperature can be improved, and local overheating or under-sintering can be avoided. This structure realizes the function of easy zoning temperature control, and enhances the uniformity and safety of NdFeB sintering. Attached Figure Description

[0016] Figure 1 This is a frontal cross-sectional view of the present invention.

[0017] Figure 2 This is a partial cross-sectional view of the cooling chamber structure of this utility model from the front view;

[0018] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 This is a front view cross-sectional structural diagram of the feeding chute of this utility model.

[0020] In the diagram: 1. Vacuum sintering furnace body; 2. Insulation layer; 3. Sintering chamber; 4. Vacuum pump; 5. Connecting pipe; 6. Heating plate; 7. Protective plate; 8. Cooling chamber; 9. Cooling water pipe; 10. Insulation pad; 11. Temperature sensor; 12. Feeding rack; 13. Mounting base; 14. Feeding slide; 15. PLC controller; 16. Mounting plate; 17. Mounting bolt; 18. Hydraulic cylinder; 19. Slider; 20. Mounting rod. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-4This utility model provides an embodiment of a vacuum sintering furnace based on sintered NdFeB magnets, comprising a vacuum sintering furnace body 1 and a PLC controller 15. The vacuum sintering furnace body 1 has a sintering chamber 3 inside, and six sets of heating plates 6 are fixedly installed inside the sintering chamber 3. Temperature sensors 11 are fixedly installed on the heating plates 6. A cooling chamber 8 is provided between the sintering chamber 3 and the vacuum sintering furnace body 1, and cooling water pipes 9 are fixedly installed inside the cooling chamber 8. Protective plates 7 are detachably installed on both sides of the vacuum sintering furnace body 1. A vacuum pump 4 is located on the right side of the vacuum sintering furnace body 1. The external fixation of the main body 1 is achieved by connecting pipe 5. Vacuum pump 4 is fixedly connected to connecting pipe 5 through pipe. Inside the vacuum sintering furnace main body 1, there is a feeding rack 12. Inside the vacuum sintering furnace main body 1, there are three sets of feeding slides 14. Hydraulic cylinder 18 is fixedly installed at the rear end of the feeding slide 14. A slider 19 is fixedly connected to the output end of the hydraulic cylinder 18. A mounting base 13 is fixedly connected to the top of the slider 19. Mounting rods 20 are fixedly connected to both sides and the bottom of the feeding rack 12. Mounting plates 16 are fixedly connected to the top and bottom of the protective plate 7. Mounting bolts 17 are provided on the mounting plates 16.

[0023] The hydraulic cylinder 18 is provided in three sets. The hydraulic cylinder 18 is electrically connected to the synchronous drive module inside the PLC controller 15. The hydraulic cylinder 18 is provided with a high temperature resistant protective structure. The slider 19 is embedded in the inside of the feeding slide 14 and is slidably connected. The mounting rod 20 is inserted into the inside of the mounting base 13.

[0024] Specifically, such as Figure 1 and Figure 4 As shown, the hydraulic cylinder 18 drives the feeding rack 12 to penetrate into the vacuum sintering furnace body 1 to begin vacuum sintering. After sintering and cooling, the furnace cover is opened, and the hydraulic cylinder 18 can push the slider 19 forward. The slider 19 drives the feeding rack 12 to move towards the outlet until it is convenient for a forklift to lift the feeding rack 12. After the feeding rack 12 rises, the mounting rod 20 at the bottom disengages from the mounting base 13 to achieve unloading.

[0025] The cooling chamber 8 is externally fixedly connected to a heat insulation layer 2, the heating plate 6 adopts an electric heating structure, and the temperature sensor 11 is electrically connected to the PLC controller 15.

[0026] Specifically, such as Figure 1 and Figure 2 As shown, six sets of heating plates 6 are arranged in a ring inside the sintering chamber 3. Each set of heating plates 6 can be heated independently. The temperature of each set of heating plates 6 can be independently controlled by the PLC controller 15 and the temperature sensor 11. By heating in zones, the uniformity of sintering temperature can be improved, and local overheating or under-sintering can be avoided. Zoned temperature control enhances the uniformity and safety of NdFeB sintering.

[0027] The cooling water pipe 9 is connected to the external pump body, and the mounting bolt 17 is installed on the outside of the vacuum sintering furnace body 1. The protective plate 7 is fixedly connected to the outside of the heat insulation pad 10, and the protective plate 7 is arc-shaped and attached to the outside of the vacuum sintering furnace body 1.

[0028] Specifically, such as Figure 1 and Figure 3 As shown, during the sintering heating process, the heat insulation layer 2 inside the vacuum sintering furnace body 1 can reduce heat loss and prevent a large amount of heat from being conducted to the outer wall of the vacuum sintering furnace body 1. When in use, the protective plate 7 can protect the easily accessible areas on both sides of the vacuum sintering furnace body 1. The protective cover composed of the protective plate 7 and the heat insulation pad 10 can prevent workers from being burned by touching the outer wall of the vacuum sintering furnace body 1. The protective plate 7 can be removed by unscrewing the mounting bolt 17.

[0029] Working principle: First, the NdFeB metal to be sintered is placed on the feeding rack 12 inside the sintering chamber 3. The hydraulic cylinder 18 drives the feeding rack 12 deeper into the vacuum sintering furnace body 1 and closes the furnace lid to begin vacuum sintering. The vacuum pump 4 can evacuate the inside of the sintering chamber 3. Then, the PLC controller 15 controls the heating plates 6 to heat up for sintering. There are six sets of heating plates 6 arranged in a ring inside the sintering chamber 3. Each set of heating plates 6 can be heated independently. The PLC controller 15 and the temperature sensor 11 can independently control the temperature of each set of heating plates 6. By heating in zones, the uniformity of the sintering temperature can be improved, avoiding local overheating or under-sintering. After sintering and cooling, the furnace lid is opened, and the hydraulic cylinder 18... 8 can push the slider 19 forward, which drives the unloading rack 12 to move towards the outlet until it is easy for a forklift to lift the unloading rack 12. After the unloading rack 12 rises, the bottom mounting rod 20 can be disengaged from the mounting base 13 to achieve unloading. During the sintering heating process, the heat insulation layer 2 inside the vacuum sintering furnace body 1 can reduce heat loss and prevent a large amount of heat from being conducted to the outer wall of the vacuum sintering furnace body 1. When in use, the protective plate 7 can protect the easily accessible areas on both sides of the vacuum sintering furnace body 1. The protective cover composed of the protective plate 7 and the heat insulation pad 10 can prevent workers from being burned by touching the outer wall of the vacuum sintering furnace body 1. The sintering furnace has the functions of easy unloading and zoned temperature control.

[0030] The computer software involved in the hardware carriers such as the PLC controller 15 in the technical solution is software technology known to those skilled in the art. It is merely applied to the aforementioned hardware carriers. The computer software portion of the technical solution is an essential technical feature for solving the aforementioned technical problem; that is, it constitutes a necessary technical feature for solving the technical problem in this application. However, it is not a differentiating technical feature for solving the technical problem, nor is it a point of technical improvement. The applicant has not made any technical improvements to the computer software portion involved in the aforementioned related hardware carriers, nor is it a key technical point of the invention.

[0031] Therefore, the "PLC controller 15" and other components involved in this application are all physical functional modules that combine existing computer software programs or protocols with the hardware carrier of this application. The computer software programs involved in these physical functional modules are technologies known to those skilled in the art and are not improvements of this application. The improvements of this application should be the interaction relationships between the various physical functional modules, that is, improvements to the overall structure of this application, in order to solve the corresponding technical problems to be solved by this application.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vacuum sintering furnace based on sintered neodymium-iron-boron, comprising a vacuum sintering furnace body (1) and a PLC controller (15), characterized in that: The vacuum sintering furnace body (1) has a sintering chamber (3) inside. Six sets of heating plates (6) are fixedly installed inside the sintering chamber (3). Temperature sensors (11) are fixedly installed on the heating plates (6). A cooling chamber (8) is provided between the sintering chamber (3) and the vacuum sintering furnace body (1). Cooling water pipes (9) are fixedly installed inside the cooling chamber (8). A heat insulation layer (2) is fixedly connected to the outside of the cooling chamber (8). Protective plates (7) are detachably installed on both sides of the vacuum sintering furnace body (1). A vacuum pump (4) is provided on the right side of the vacuum sintering furnace body (1). The outside of the vacuum sintering furnace body (1) is fixedly connected by a connecting pipe (5). The vacuum pump (4) is fixedly connected to the connecting pipe (5) through a pipe. The vacuum sintering furnace body (1) has a feeding rack (12) inside. The vacuum sintering furnace body (1) has three sets of feeding slides (14) fixedly connected inside. The rear end of the feeding slide (14) is fixedly installed with a hydraulic cylinder (18). The output end of the hydraulic cylinder (18) is fixedly connected with a slider (19). The top of the slider (19) is fixedly connected with a mounting base (13). The sides and bottom of the feeding rack (12) are fixedly connected with mounting rods (20). The top and bottom of the protective plate (7) are fixedly connected with mounting plates (16). The mounting plates (16) are provided with mounting bolts (17).

2. The vacuum sintering furnace based on sintered neodymium-iron-boron according to claim 1, characterized in that The hydraulic cylinder (18) is provided in three sets. The hydraulic cylinder (18) is electrically connected to the synchronous drive module inside the PLC controller (15). The hydraulic cylinder (18) is provided with a high temperature resistant protective structure.

3. The vacuum sintering furnace based on sintered neodymium-iron-boron according to claim 1, characterized in that The slider (19) is slidably connected inside the feeding slide (14), and the mounting rod (20) is inserted inside the mounting base (13).

4. A vacuum sintering furnace based on sintered NdFeB as described in claim 1, characterized in that: The heating plate (6) adopts an electric heating structure, and the temperature sensor (11) is electrically connected to the PLC controller (15).

5. The vacuum sintering furnace based on sintered neodymium-iron-boron according to claim 1, characterized in that The cooling water pipe (9) is connected to the external pump body, and the mounting bolt (17) is installed on the outside of the vacuum sintering furnace body (1).

6. The vacuum sintering furnace based on sintered neodymium-iron-boron according to claim 1, characterized in that The protective plate (7) is fixedly connected to the outside of the heat insulation pad (10), and the protective plate (7) is arc-shaped and attached to the outside of the vacuum sintering furnace body (1).

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