Sintered neodymium iron boron grain boundary permeation equipment

Abstract

The invention relates to the technical field of magnetic materials, in particular to sintered neodymium iron boron grain boundary permeation equipment which comprises a magnetic stirrer and a container mounted on the magnetic stirrer, alloy slurry is placed in the container, and a mounting plate is arranged on one side of the magnetic stirrer; a first coating wheel, a stirring wheel and a second coating wheel are arranged in the container, a pressing wheel capable of ascending and descending is arranged above the second coating wheel, the first coating wheel and the stirring wheel are located on the left side and the right side of the second coating wheel respectively, the pressing wheel is located above the second coating wheel, and a gap is formed between the pressing wheel and the second coating wheel so that materials can pass through the pressing wheel conveniently. Compared with a traditional mode, the equipment developed by the invention has the advantages that the coating position and the coating amount of the alloy slurry on the magnetic steel can be accurately controlled according to requirements, the product switching speed is higher (a large number of tools are not needed), the input cost is lower, the coating amount of a diffusion source is smaller, consumed heavy rare earth is less, and the equipment has better economic benefits and is suitable for industrialization.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic materials, and more specifically to a sintered NdFeB grain boundary penetration device. Background Art

[0002] Sintered NdFeB magnets are the third generation of rare earth permanent magnets. The main grades used in the automotive field are 38SH-45EH. In order to obtain magnets with high intrinsic coercivity, it is necessary to add different amounts of medium rare earths (Dy and Tb) in the distribution system. Although the intrinsic coercivity meets the market requirements, it is necessary to add enough rare earths. As a result, the maximum magnetic energy product is significantly reduced. Although the grade of magnets required by customers can be obtained, the cost has remained high. In order to meet market demand, in recent years, some rare earth permanent magnet experts and enterprise technical R&D personnel have been committed to studying how to improve the coercivity, adjusting the grain boundary equalization process by refining the grains and optimizing the process. However, the above The performance improvement of the process is limited, and the process of refining grains is extremely demanding for the control of the production process. After the unremitting efforts of scientific researchers and enterprise technical R&D personnel, in recent years, grain boundary penetration has been achieved: heavy rare earth (Dy and Tb hydride or fluoride) is coated on the surface of magnetic steel close to the finished size, and then a penetration layer is formed on the surface of the magnetic steel through a suitable heat treatment process, thereby greatly improving the coercive force of the magnet, and under the premise that the remanence remains almost unchanged, the performance of the magnetic steel is improved (from H to SH, UH and EH grades). Its products are mainly used in the automotive industry and industrial motor industry, and these two industries occupy more than 50% of the rare earth permanent magnet NdFeB material market.

[0003] Regarding the equipment for grain boundary penetration coating, the more mature methods currently include: screen printing, PVD, spraying, dipping and other production methods. The advantages of screen printing are that it is very suitable for the production of large quantities of products, with high production efficiency, high degree of production line automation, and good consistency of the products produced. Its disadvantages are high equipment investment, high mold investment cost in the production process, and slow product switching efficiency. Advantages and disadvantages of PVD production: It is suitable for the production of products of various shapes and sizes, and the consistency of the products produced is good, but the low utilization rate of target materials is the main reason why it cannot be widely promoted in the industry. Advantages of spraying and dipping production: Similar to the PVD production process, it can produce products of various shapes and sizes. The disadvantage is that the utilization rate of heavy rare earth metals is not high.

[0004] Therefore, we proposed a sintered NdFeB grain boundary penetration device to solve the above problems. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a sintered NdFeB grain boundary infiltration device to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a sintered NdFeB grain boundary penetration device, comprising a magnetic stirrer and a container mounted on the magnetic stirrer, wherein alloy slurry is placed in the container, and a mounting plate is provided on one side of the magnetic stirrer; The container is provided with a first coating wheel, a stirring wheel and a second coating wheel, a lifting and lowering pressing wheel is provided above the second coating wheel, the first coating wheel and the stirring wheel are respectively located on the left and right sides of the second coating wheel, the pressing wheel is located above the second coating wheel, and there is a gap between the two to facilitate the passage of materials; The stirring wheel rotates clockwise to prevent the alloy slurry in the container from settling; The first coating wheel rotates counterclockwise, and the first coating wheel and the second coating wheel cooperate with each other to control the coating speed and coating amount of the alloy slurry; The second coating wheel rotates counterclockwise, and the second coating wheel brings up the alloy slurry from the container by rotating. By controlling the rotation speed of the second coating wheel, the coating amount of the target slurry can be controlled; The second coating wheel is provided with raised particles, and the shapes of the raised particles are preferably round, square and triangular, and the size of the raised particles is 0.1mm² -10cm²; The material passes between the pressing wheel and the second coating wheel, and the material is transmitted by a conveyor belt.

[0007] In a preferred embodiment, the first coating wheel includes a No. 1 wheel, which is in a container, and a No. 1 rod is penetrated through the side wall of the No. 1 wheel, and a ring connected to the No. 1 rod is sleeved on the No. 1 rod, and a sealed bearing is provided at the connection between the ring and the No. 1 rod, and a pipe connected to an external pump body is installed on the ring, and the input end of the pump body is connected to the alloy slurry source, and a No. 1 motor matching it is installed at one end of the No. 1 rod, and a No. 1 mounting seat for fixing the No. 1 motor is installed on the mounting plate.

[0008] In a preferred embodiment, the number one wheel includes a rolling wheel, the rolling wheel is provided with an opening connected to the number one rod, a plurality of liquid spraying outlets are penetrated through the side wall of the rolling wheel, and a blocking piece is provided in each of the plurality of liquid spraying outlets, and a power piece capable of moving the blocking piece is provided on one side of each of the plurality of blocking pieces.

[0009] In a preferred embodiment, the blocking member includes a limit rod arranged in the rolling wheel, the limit rod is sleeved with a spring, and the limit rod is sleeved with a blocking block matching the liquid spray port, the side wall of the blocking block is sleeved with a sealing block, the side wall of the sealing block is sleeved with a sealing ring, the side wall of the sealing block is fixedly connected with a protrusion, the protrusion is provided with a check groove, the side wall of the rolling wheel is fixedly connected with a sealing block matching the sealing ring and the protrusion, the side wall of the sealing block is provided with a notch matching the protrusion, and the side wall of the notch is fixedly connected with a check ring matching the check groove.

[0010] In a preferred embodiment, the power part includes a mounting block fixedly connected to the side wall of the rolling wheel, and one end of the limit rod and the spring are fixed on the mounting block, and an electromagnetic block magnetically connected to the sealing block is provided in the mounting block, and a guide rod connected to the electromagnetic block is fixedly connected to the side wall of the mounting block, one end of the two guide rods are inlaid with a first contact ball matching therewith, one side of the two guide rods are provided with a power box, and the side walls of the two power boxes are fixedly connected with wires, a movable contact plate is provided in the power box, the contact plate is connected to the wire through a storage tube, a second contact ball matching the first contact ball is inlaid on the side wall of the contact plate, and a spring connected to the power box is fixedly connected to the side wall of the contact plate.

[0011] In a preferred embodiment, the stirring wheel includes a stirring rolling wheel, a No. 2 rod is provided through the side wall of the stirring rolling wheel, the No. 2 rod is connected to the No. 1 rod through a transmission member, a plurality of stirring members are provided in the stirring rolling wheel, and a magnetic ring matching the plurality of stirring members is fixedly connected to the side wall of the container, and the magnetic ring is arc-shaped.

[0012] In a preferred embodiment, the stirring element includes an extension seat fixedly connected to the inner side wall of the stirring rolling wheel, a movable spring seat is fixedly connected to the inner side wall of the extension seat, an extension plate extending to the outside of the side wall of the stirring rolling wheel is fixedly connected to the end face of the spring seat, a magnetic plate is fixedly connected to one end of the extension plate, a sealing rubber gasket is fixedly connected to the side wall of the magnetic plate, a sealing covering gasket is fixedly connected to the side wall of the sealing rubber gasket, and the sealing covering gasket can cover the connection between the sealing rubber gasket and the stirring rolling wheel.

[0013] In a preferred embodiment, a No. 2 mounting seat fixedly mounted on a mounting plate is provided on one side of the second coating wheel, a No. 2 motor is mounted on the side wall of the No. 2 mounting seat, a No. 3 rod is fixedly connected to the driving shaft of the No. 2 motor, a bearing seat matching the No. 3 rod is mounted on the mounting plate, one end of the No. 3 rod is connected to the second coating wheel, and raised particles are arranged on the second coating wheel.

[0014] In a preferred embodiment, a telescopic column fixedly mounted on a mounting plate is provided on one side of the pressing wheel, a telescopic bending rod is passed through the telescopic column, a fixing screw in contact with the telescopic bending rod is threadedly connected to the side wall of the telescopic column, one end of the telescopic bending rod is fixedly connected to a connecting seat, the pressing wheel is arranged in the connecting seat, and the pressing wheel is located above the second coating wheel.

[0015] Technical effects and advantages of the present invention: Compared with the traditional method, the equipment developed by the present invention can accurately control the coating position and coating amount of the alloy slurry on the magnetic steel as needed, the product switching speed is faster (no need for a large amount of tooling), the investment cost is lower, the diffusion source coating amount is less, and the heavy rare earth consumption is less. It has better economic benefits and is suitable for industrialization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the first viewing angle connection structure of the present invention; Figure 3 It is a schematic diagram of the second viewing angle connection structure of the present invention; Figure 4 It is a schematic diagram of the external connection structure of the first coating wheel in the present invention; Figure 5 It is a schematic diagram of the internal cross-sectional connection structure of the first coating wheel in the present invention; Figure 6 It is a schematic diagram of the local connection structure of the blocking member in the present invention; Figure 7 It is a schematic diagram of a partial cross-sectional connection structure of a power member in the present invention; Figure 8 It is a schematic diagram of the connection structure of the stirring wheel in the present invention; Fig. 9 It is a schematic diagram of the partial cross-sectional connection structure of the stirring wheel in the present invention; Fig.10 It is a schematic diagram of the partial connection structure of the stirring member in the present invention; Fig.11 It is a schematic diagram of the third viewing angle connection structure of the present invention; Fig.12 It is a schematic diagram of coating the alloy slurry on the surface of the NdFeB magnet in the present invention.

[0017] The accompanying drawings are denoted by: 1 magnetic stirrer, 2 container; 3 a first coating wheel, 31 a first wheel, 32 a first rod, 33 a first motor, 34 a first mounting seat; 311 rolling wheel, 312 opening, 313 liquid spraying port, 314 blocking member, 315 power member; 3141 limiting rod, 3142 spring, 3143 blocking block, 3144 sealing block, 3145 sealing ring, 3146 protrusion, 3147 check groove, 3148 sealing block; 3151 mounting block, 3152 guide rod, 3153 first contact ball, 3154 power box, 3155 wire, 3156 storage tube, 3157 contact plate, 3158 second contact ball, 3159 spring; 4 a stirring wheel, 41 a stirring rolling wheel, 42 a second rod, 43 a stirring member, 44 a magnetic ring; 431 extension seat, 432 spring seat, 433 extension plate, 434 magnetic plate, 435 sealing rubber pad, 436 sealing covering pad; 5 second coating wheel, 51 second mounting seat, 52 second motor, 53 third rod, 54 bearing seat; 6 pressure wheel, 61 telescopic column, 62 telescopic bending rod, 63 fixing screw, 64 connecting seat; 7 Mounting plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Reference Figure 1 and Figure 2, a sintered NdFeB grain boundary penetration device, including a magnetic stirrer 1. It is particularly noteworthy that the magnetic stirrer 1 is mainly used for stirring or simultaneously heating and stirring low-viscosity liquids or solid-liquid mixtures. Its basic principle is to use the principle of like charges repelling each other and opposite charges attracting each other in the magnetic field, and use the magnetic field to drive a magnetic stirrer placed in a container to perform a circular motion, thereby achieving the purpose of stirring the liquid. The magnetic stirrer 1 is equipped with a plurality of bent limit strips, and an inclined support plate is also installed on the side wall of the magnetic stirrer 1, so that the container 2 can be effectively supported, further ensuring the stability of the container 2. At the same time, a container 2 is placed on the magnetic stirrer 1. It is particularly noteworthy that the container 2 is filled with alloy slurry. A mounting plate 7 is installed on one side of the magnetic stirrer 1. It is particularly noteworthy that the mounting plate 7 is used to install and fix a first coating wheel 3, a stirring wheel 4, a second coating wheel 5 and a pressing wheel 6. The container 2 is provided with a first coating wheel 3. A stirring wheel 4 and a second coating wheel 5. The first coating wheel 3 and the stirring wheel 4 are respectively located on the left and right sides of the second coating wheel 5. A pressure wheel 6 is provided above the second coating wheel 5. The pressure wheel 6 is above the second coating wheel 5. The first coating wheel 3, the stirring wheel 4 and the second coating wheel 5 are provided in the container 2. A lifting and lowering pressure wheel 6 is provided above the second coating wheel 5. The first coating wheel 3 and the stirring wheel 4 are respectively located on the left and right sides of the second coating wheel 5. The pressure wheel 6 is above the second coating wheel 6, and there is a distance between the two to facilitate the passage of materials. An electromagnetic stirrer 1 is added directly below the container 2 where the slurry is placed. Compared with traditional mechanical stirring, it can effectively solve the risk of slurry spilling due to opening holes. The container 2 for alloy slurry is preferably made of 304 stainless steel, not limited to stainless steel, but can also be glass, polymer materials and other metal materials. The size can be adjusted as needed, not limited to rectangle, but can also be round or irregular.

[0020] The stirring wheel 4 rotates clockwise to prevent the alloy slurry in the container 2 from settling; the magnetic stirrer 6 and the stirring wheel 4 are both controlled by a variable frequency motor, and the linear speed is adjustable in the range of 0.1 cm-1 m / s. The material of the stirring wheel 4 is preferably high manganese steel or 304 stainless steel, and the diameter can be adjusted according to actual needs; The first coating wheel 3 rotates counterclockwise, and the first coating wheel 3 and the second coating wheel 5 cooperate with each other to control the coating speed and coating amount of the alloy slurry; The materials of the first coating wheel 3 and the second coating wheel 5 are preferably high manganese steel or 304 stainless steel, and the speed can be adjusted according to the coating weight, and the diameter can be adjusted according to actual needs; The second coating wheel 5 rotates counterclockwise, and the first coating wheel 3 rotates clockwise, and their speeds are precisely controlled by the variable frequency motor. In addition, the size and position of the protruding particles on the second coating wheel 5 can be controlled according to the coating amount requirements.

[0021] The second coating wheel 5 rotates counterclockwise, and the second coating wheel 5 brings up the alloy slurry from the container 2 by rotating. By controlling the rotation speed of the second coating wheel 5, the coating amount of the target slurry can be controlled; The second coating wheel 5 is provided with raised particles, and the shapes of the raised particles are preferably round, square and triangular, and the size of the raised particles is 0.1mm²-10cm². The density or position of the raised particles on the second coating wheel 5 can be at the center of the arc surface of the second coating wheel 5, at the edge of the arc surface of the second coating wheel 5, or at any position on the arc surface of the second coating wheel 5.

[0022] The material passes between the pressing wheel 6 and the second coating wheel 5, and the material is transmitted by a conveyor belt. The material of the pressing wheel 6 is preferably rubber resin material. The neodymium iron boron magnet passes between the pressing wheel 6 and the second coating wheel 5 along the direction of the arrow. The transmission method is preferably conveyor belt transmission, and continuity is maintained as much as possible.

[0023] A sintered NdFeB grain boundary infiltration device, the method shown is as follows: Step S1: introducing the prepared alloy slurry into the alloy slurry container 2; Step S2: Then, the magnetic stirrer 1 is turned on, and the stirring wheel 4 is turned on. The stirring wheel 4 rotates clockwise to start stirring the alloy slurry to prevent the alloy slurry from settling; Step S3: Turn on the second coating wheel 5 and the first coating wheel 3, wherein the second coating wheel 5 rotates counterclockwise and the first coating wheel 3 rotates clockwise, and the rotation speed of the wheels is adjusted as needed; Step S4: The position of the pressure wheel 6 rotates counterclockwise as the NdFeB magnet is transmitted in the direction of the arrow; Step S5: The NdFeB magnet passes between the second coating wheel 5 and the pressing wheel 6 along the direction of the arrow, so that the alloy slurry can be evenly coated on the lower surface of the NdFeB magnet.

[0024] Implementation method: Substrate preparation Prepare the NdFeB magnets to be coated and clean the surface. The size of NdFeB is generally rectangular and can be (10-50) mm*(10-50) mm*(0.5-10) mm. The coating surface is 40*10 (mm); Equipment debugging The alloy slurry is introduced into the slurry container, the stirring wheel 4 and the magnetic stirrer 1 are turned on, the second coating wheel 5 and the first coating wheel 3 are turned on at the same time, and the position of the pressing wheel 6 is adjusted. In addition, the second coating wheel 5 can be selected from four types: a flat wheel, a wheel with circular convex spots, a wheel with square convex spots, and a concave-convex wheel.

[0025] Equipment operation The NdFeB magnet is conveyed to the front end of the equipment by a conveyor belt, and then the NdFeB magnet passes between the second coating wheel 5 and the pressing wheel 6 at a uniform speed, and the slurry is coated on the lower surface of the NdFeB magnet; Drying and testing The NdFeB magnets after step 3 are dried in a tunnel furnace at 70-100°C for 3-5 minutes, and then the coating weight gain ratio and slurry coating position are tested.

[0026] The results of coating are as follows Fig.12 As shown, the gray area is the slurry coating area, and the white area is the uncoated area of ​​the NdFeB substrate. Fig.12 (a) is the whole coating diagram, Fig.12 (b) is a diagram showing a partially coated magnet surface with circular convex spots. Fig.12 (c) is a partial coating image of the surface of the NdFeB substrate with quadrilateral convex points. Fig.12 (d) shows that wheel 1 has an undulating structure and a long strip coating on the surface of the NdFeB substrate. In short, the coating position of the alloy slurry on the magnetic steel can be accurately controlled according to requirements. It should be noted that when the equipment is running, the loading can be manual or vibration plate loading, and the drying can be tunnel furnace drying or oven drying.

[0027] The uniformity of the final coating is mainly controlled by the speed of the first coating wheel 3, the second coating wheel 5 and the pressing wheel 6. The weight of the alloy slurry coating on the surface of the magnet, the area of ​​the alloy slurry coating, and the position of the alloy slurry coating on the magnet are controlled by the time the NdFeB magnet passes through the second coating wheel 5 and the pressing wheel 6, and the size of the protruding particles on the second coating wheel 5.

[0028] Reference Figure 3 and Figure 4 The first coating wheel 3 includes a No. 1 wheel 31, which is in the container 2. A No. 1 rod 32 is penetrated through the side wall of the No. 1 wheel 31. It is particularly noteworthy that a sleeve ring is sleeved on the No. 1 rod 32 and is connected to the No. 1 rod 32. A sealing bearing is provided at the connection between the sleeve ring and the No. 1 rod 32. A pipe connected to an external pump body is installed on the sleeve ring, and the input end of the pump body is connected to the alloy slurry source. A No. 1 motor 33 matching with the No. 1 rod 32 is installed at one end, and a No. 1 mounting seat 34 for fixing the No. 1 motor 33 is installed on the mounting plate 7.

[0029] Refer to 4 and Figure 5 The number one wheel 31 includes a rolling wheel 311, and an opening 312 is provided on the rolling wheel 311 and communicated with the number one rod 32. A plurality of liquid spraying ports 313 are penetrated through the side wall of the rolling wheel 311, and a blocking member 314 is provided in each of the plurality of liquid spraying ports 313. A power member 315 capable of moving the blocking member 314 is provided on one side of each of the plurality of blocking members 314.

[0030] Reference Figure 5 and Figure 6 The blocking member 314 includes a limiting rod 3141 arranged in the rolling wheel 311, the limiting rod 3141 is sleeved with a spring 3142, and the limiting rod 3141 is sleeved with a blocking block 3143 matching the liquid injection port 313, the side wall of the blocking block 3143 is sleeved with a sealing block 3144, the side wall of the sealing block 3144 is sleeved with a sealing ring 3145, the side wall of the sealing block 3144 is fixedly connected with a protrusion 3146, and the protrusion 3146 is provided with a check groove 3147, and the rolling wheel 311 is provided with a stopper 3147. A sealing block 3148 matching the sealing ring 3145 and the protrusion 3146 is fixedly connected to the side wall of the wheel 311. It is more important to note that a groove matching the protrusion 3146 is provided on the side wall of the sealing block 3148, and a check ring matching the check groove 3147 is fixedly connected to the side wall of the groove. It is particularly noteworthy that the structure here is not drawn in the text. This is the prior art and will not be elaborated here. The check ring and the groove can effectively prevent the leakage of the alloy solution.

[0031] Reference Figure 5 , Figure 6 and Figure 7 The power member 315 includes a mounting block 3151 fixedly connected to the side wall of the rolling wheel 311, and one end of the limit rod 3141 and the spring 3142 are fixed on the mounting block 3151, and an electromagnetic block magnetically connected to the sealing block 3144 is provided in the mounting block 3151, and a guide rod 3152 connected to the electromagnetic block is fixedly connected to the side wall of the mounting block 3151, and one end of the two guide rods 3152 is inlaid with a first contact ball 3153 matching therewith, and one side of the two guide rods 3152 is provided with a power box 3154, and the side walls of the two power boxes 3154 are fixedly connected with a wire 3155, and the power box 3154 is provided with a movable contact plate 31 57. The contact plate 3157 is connected to the wire 3155 through the storage tube 3156. It is worth noting that the storage tube 3156 is a corrugated tube, which can store a certain amount of wire 3155, so as to avoid the wire 3155 being unable to move the contact plate 3157 due to insufficient length. A part of the wire 3155 is fixedly connected to the side wall of the power box 3154, so that a part of the wire 3155 can be placed in the storage tube 3156, further ensuring the normal use of the device. A second contact ball 3158 is embedded on the side wall of the contact plate 3157, and a spring 3159 connected to the power box 3154 is fixedly connected to the side wall of the contact plate 3157.

[0032] Reference Figure 8 and Fig. 9The stirring wheel 4 includes a stirring rolling wheel 41, and a second rod 42 is penetrated on the side wall of the stirring rolling wheel 41. The second rod 42 is connected to the first rod 32 through a transmission member. It is particularly noteworthy that the transmission member can be a transmission member composed of a pulley group, or a transmission member composed of a multi-stage transmission gear. A plurality of stirring members 43 are provided in the stirring rolling wheel 41, and a magnetic ring 44 matching the plurality of stirring members 43 is fixedly connected to the side wall of the container 2. It is particularly noteworthy that the magnetic ring 44 is arc-shaped, and a nano-coating is sprayed on the magnetic ring 44, which can prevent the alloy slurry from adhering to the magnetic ring 44. It is particularly noteworthy that the alloy will not affect the normal use of the magnetic ring.

[0033] Reference Fig. 9 and Fig.10 The stirring member 43 includes an extension seat 431 fixedly connected to the inner side wall of the stirring rolling wheel 41, a movable spring seat 432 fixedly connected to the inner side wall of the extension seat 431, an extension plate 433 extending to the outside of the side wall of the stirring rolling wheel 41 fixedly connected to the end face of the spring seat 432, a magnetic plate 434 fixedly connected to one end of the extension plate 433, a sealing gasket 435 fixedly connected to the side wall of the magnetic plate 434, a sealing covering gasket 436 fixedly connected to the side wall of the sealing gasket 435, and the sealing covering gasket 436 can cover the connection between the sealing gasket 435 and the stirring rolling wheel 41.

[0034] Reference Fig.11 A No. 2 mounting seat 51 fixedly mounted on the mounting plate 7 is provided on one side of the second coating wheel 5, a No. 2 motor 52 is mounted on the side wall of the No. 2 mounting seat 51, a No. 3 rod 53 is fixedly connected to the driving shaft of the No. 2 motor 52, a bearing seat 54 matching the No. 3 rod 53 is mounted on the mounting plate 7, one end of the No. 3 rod 53 is connected to the second coating wheel 5, and raised particles are arranged on the second coating wheel 5.

[0035] Reference Fig.11 A telescopic column 61 fixedly mounted on the mounting plate 7 is provided on one side of the pressing wheel 6, a telescopic bending rod 62 passes through the telescopic column 61, a fixing screw 63 in contact with the telescopic bending rod 62 is threadedly connected to the side wall of the telescopic column 61, one end of the telescopic bending rod 62 is fixedly connected to a connecting seat 64, the pressing wheel 6 is arranged in the connecting seat 64, and the pressing wheel 6 is above the second coating wheel 5.

[0036] First, the staff can start the magnetic stirrer 1 and the stirring wheel 4, so that the magnetic stirrer 1 can work. At the same time, it is particularly noted that a transmission member is provided on one side of the stirring wheel 4, and the first motor 33 can rotate the stirring wheel 4 through the transmission member, or a motor is installed on one side of the stirring wheel 4, which can further rotate the stirring wheel 4. Both methods are acceptable. The user can choose different driving methods according to actual conditions. When the stirring wheel 4 rotates, the extension plate 433 can be placed on one side of the magnetic ring 44, and because the magnetic ring 44 and the magnetic plate 43 4 is magnetically connected, so the magnetic plate 434 can be extended under the magnetic force of the magnetic ring 44, and the stirring wheel 4 also rotates accordingly, which can further stir the alloy solution in the container 2, further improving the stirring effect of the device, and when the extension plate 433 is away from the magnetic ring 44, the extension plate 433 can be reset autonomously with the assistance of the spring seat 432, so that the sealing cover pad 436 can cover the connection between the stirring rolling wheel 41 and the extension plate 433 again, further ensuring the normal use of the device.

[0037] Secondly, during this process, the scroll wheel 311 can rotate with the assistance of the No. 1 motor 33. When the scroll wheel 311 rotates, the guide rod 3152 can be rotated. It is particularly noteworthy that the power box 3154 is located above the container 2, which can further ensure the normal use of the power box 3154. When the guide rod 3152 rotates, the first contact ball 3153 and the second contact ball 3158 can be brought into contact. At this time, the contact plate 3157, with the assistance of the spring 3159, can make the second contact ball 3158 fit tightly against the first contact ball 3153, so that the electromagnet in the mounting block 3151 can be energized. It is particularly noteworthy that an electromagnet is provided in the mounting block 3151, and the electromagnet is not in contact with the alloy solution. When the electromagnet is working, the sealing block 3144 can be moved. It is particularly noteworthy that the sealing block 3144 contains an iron block , thereby ensuring the normal use of the device, and further enabling the blocking block 3143 to move, so that the liquid spraying port 313 can be exposed, and it is particularly noteworthy that the external pump body can always work, so that the alloy solution can be exposed from the liquid spraying port 313 located above the container and in an inclined position, and further enabling the alloy solution to be sprayed on the second coating wheel 5, so that a more uniform alloy solution can adhere to the second coating wheel 5, and secondly, it is particularly noteworthy that when the guide rod 3152 is away from the contact plate 3157, the first contact ball 3153 and the second contact ball 3158 can be separated, so that the electromagnet in the mounting block 3151 can be powered off, and with the assistance of the spring 3142, the blocking block 3143 can be reinserted into the liquid spraying port 313, thereby avoiding the alloy solution from being sprayed at other positions of the first coating wheel 3, further ensuring the coating quality.

[0038] At this time, the material will be transported through the conveyor belt, and the material passes between the second coating wheel 5 and the pressure wheel 6, so that the material can be fully coated, further ensuring the quality of the coating. The staff can adjust the speed of the second motor 52 according to the actual situation to further adjust the coating effect. At the same time, the staff can change the position of the pressure wheel 6 according to the actual situation, so that the telescopic rod 62 can move in the telescopic column 61, and then rotate the fixing screw 63, so that the telescopic bending rod 62 can be fixed, so that the pressure wheel 6 can be in a suitable position, further ensuring the normal use of the device.

[0039] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change; Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sintered NdFeB grain boundary infiltration device, characterized in that; It comprises a magnetic stirrer (1) and a container (2) mounted on the magnetic stirrer (1), wherein alloy slurry is placed in the container (2), and a mounting plate (7) is provided on one side of the magnetic stirrer (1); A first coating wheel (3), a stirring wheel (4) and a second coating wheel (5) are provided in the container (2); a lifting and lowering pressing wheel (6) is provided above the second coating wheel (5); the first coating wheel (3) and the stirring wheel (4) are respectively located on the left and right sides of the second coating wheel (5); the pressing wheel (6) is located above the second coating wheel (6), and a gap is provided between the two to facilitate the passage of materials; The stirring wheel (4) rotates clockwise to prevent the alloy slurry in the container (2) from settling; The first coating wheel (3) rotates counterclockwise, and the first coating wheel (3) and the second coating wheel (5) cooperate with each other to control the coating speed and coating amount of the alloy slurry; The second coating wheel (5) rotates counterclockwise, and the second coating wheel (5) brings up the alloy slurry from the container (2) by rotating. By controlling the rotation speed of the second coating wheel (5), the amount of target slurry coated is controlled; The second coating wheel (5) is provided with raised particles, and the shapes of the raised particles are preferably circular, square and triangular, and the size of the raised particles is 0.1 mm² -10 cm²; Materials pass between the pressing wheel (6) and the second coating wheel (5), and the materials are transported by a conveyor belt.

2. A sintered NdFeB grain boundary infiltration device according to claim 1, characterized in that: The first coating wheel (3) comprises a number one wheel (31), the number one wheel (31) is in the container (2), a number one rod (32) is provided through the side wall of the number one wheel (31), a sleeve is sleeved on the number one rod (32) and is connected to the number one rod (32), a sealing bearing is provided at the connection between the sleeve and the number one rod (32), a pipe connected to an external pump body is installed on the sleeve, and the input end of the pump body is connected to an alloy slurry source, a number one motor (33) matching the number one rod (32) is installed at one end, and a number one mounting seat (34) for fixing the number one motor (33) is installed on the mounting plate (7).

3. A sintered NdFeB grain boundary infiltration device according to claim 2, characterized in that: The number one wheel (31) comprises a rolling wheel (311), the rolling wheel (311) is provided with an opening (312) connected to the number one rod (32), a plurality of liquid spraying ports (313) are provided through the side wall of the rolling wheel (311), a blocking member (314) is provided in each of the plurality of liquid spraying ports (313), and a power member (315) capable of moving the blocking member (314) is provided on one side of each of the plurality of blocking members (314).

4. A sintered NdFeB grain boundary infiltration device according to claim 3, characterized in that: The blocking member (314) comprises a limiting rod (3141) disposed in the rolling wheel (311), the limiting rod (3141) being sleeved with a spring (3142), and the limiting rod (3141) being sleeved with a blocking block (3143) matching the liquid spraying port (313), the side wall of the blocking block (3143) being sleeved with a sealing block (3144), and the side wall of the sealing block (3144) being sleeved with a sealing ring (3145), and the sealing block (31 A protrusion (3146) is fixedly connected to the side wall of the roller (311), and a non-return groove (3147) is provided on the protrusion (3146); a sealing block (3148) matching the sealing ring (3145) and the protrusion (3146) is fixedly connected to the side wall of the roller (311); a notch matching the protrusion (3146) is provided on the side wall of the sealing block (3148), and a non-return ring matching the non-return groove (3147) is fixedly connected to the side wall of the notch.

5. A sintered NdFeB grain boundary infiltration device according to claim 4, characterized in that: The power member (315) comprises a mounting block (3151) fixedly connected to the side wall of the rolling wheel (311), one end of the limit rod (3141) and the spring (3142) are both fixed to the mounting block (3151), an electromagnetic block magnetically connected to the sealing block (3144) is provided in the mounting block (3151), and a guide rod (3152) connected to the electromagnetic block is fixedly connected to the side wall of the mounting block (3151), one end of the two guide rods (3152) are both inlaid with a first contact ball (3153) matching therewith, and the two guide rods (3152) are A power box (3154) is provided on each side, and a wire (3155) is fixedly connected to the side walls of the two power boxes (3154). A movable contact plate (3157) is provided in the power box (3154), and the contact plate (3157) is connected to the wire (3155) via a storage tube (3156). A second contact ball (3158) matching the first contact ball (3153) is inlaid on the side wall of the contact plate (3157), and a spring (3159) connected to the power box (3154) is fixedly connected to the side wall of the contact plate (3157).

6. A sintered NdFeB grain boundary infiltration device according to claim 2, characterized in that: The stirring wheel (4) comprises a stirring rolling wheel (41), a second rod (42) is provided through the side wall of the stirring rolling wheel (41), the second rod (42) is connected to the first rod (32) via a transmission member, a plurality of stirring members (43) are provided in the stirring rolling wheel (41), and a magnetic ring (44) matching the plurality of stirring members (43) is fixedly connected to the side wall of the container (2), and the magnetic ring (44) is arc-shaped.

7. A sintered NdFeB grain boundary infiltration device according to claim 6, characterized in that: The stirring member (43) comprises an extension seat (431) fixedly connected to the inner side wall of the stirring rolling wheel (41); a movable spring seat (432) is fixedly connected to the inner side wall of the extension seat (431); an extension plate (433) extending to the outside of the side wall of the stirring rolling wheel (41) is fixedly connected to the end surface of the spring seat (432); a magnetic plate (434) is fixedly connected to one end of the extension plate (433); a sealing rubber pad (435) is fixedly connected to the side wall of the magnetic plate (434); a sealing covering pad (436) is fixedly connected to the side wall of the sealing rubber pad (435); and the sealing covering pad (436) can cover the connection between the sealing rubber pad (435) and the stirring rolling wheel (41).

8. The sintered NdFeB grain boundary infiltration equipment according to claim 1, characterized in that: A No. 2 mounting seat (51) fixedly mounted on the mounting plate (7) is provided on one side of the second coating wheel (5); a No. 2 motor (52) is mounted on the side wall of the No. 2 mounting seat (51); a No. 3 rod (53) is fixedly connected to the driving shaft of the No. 2 motor (52); a bearing seat (54) matching the No. 3 rod (53) is mounted on the mounting plate (7); one end of the No. 3 rod (53) is connected to the second coating wheel (5); and the protruding particles are arranged on the second coating wheel (5).

9. A sintered NdFeB grain boundary infiltration device according to claim 8, characterized in that: A telescopic column (61) fixedly mounted on the mounting plate (7) is provided on one side of the pressing wheel (6); a telescopic bending rod (62) passes through the telescopic column (61); a fixing screw (63) in contact with the telescopic bending rod (62) is threadedly connected to the side wall of the telescopic column (61); one end of the telescopic bending rod (62) is fixedly connected to a connecting seat (64); the pressing wheel (6) is arranged in the connecting seat (64), and the pressing wheel (6) is located above the second coating wheel (5).

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