A neodymium iron boron cleaning, drying and blueing equipment

Abstract

The invention discloses a cleaning, drying and bluing equipment for NdFeB, comprising a frame, a mesh belt conveyor device is arranged on the frame, a feeding area is arranged on the mesh belt conveyor device in sequence along the conveying direction thereof, a bluing device for bluing heat treatment of NdFeB steel sheets, a first cooling device for cooling the NdFeB steel sheets after bluing heat treatment, a cleaning device for cleaning the NdFeB steel sheets after cooling treatment, a cold wind wind cutting device for scraping off the surface moisture of the NdFeB steel sheets after cleaning, a hot wind wind cutting device for scraping off the remaining moisture on the surface of the NdFeB steel sheets and preheating and drying the NdFeB steel sheets, a drying device for drying the NdFeB steel sheets and a discharging area. The invention integrates bluing heat treatment, cleaning, dehydration and drying, can quickly complete the surface oxidation and cleaning of NdFeB on the same production line, so that a uniform dark blue protective layer is formed on the surface of NdFeB, has high production efficiency and is suitable for mass production.

Description

Technical Field

[0001] The invention relates to the technical field of surface anticorrosion, in particular to a NdFeB cleaning, drying and bluing device. Background Art

[0002] In recent years, the application and development of NdFeB permanent magnet materials have been very rapid, and the success or failure of the protection of NdFeB permanent magnet materials is one of the key technologies related to whether the materials can be promoted and applied.

[0003] The premise of NdFeB permanent magnet material application is to solve the anti-corrosion problem of NdFeB permanent magnet material first; as a porous material prepared by powder metallurgy process, due to the neodymium-rich phase, NdFeB main phase and boundary phase are easy to form intergranular corrosion, and the rare earth element neodymium in NdFeB powder alloy is active, which makes the corrosion resistance of the whole NdFeB alloy very poor. It is very easy to rust and corrode in a hot and humid environment. The magnetic properties are reduced or damaged due to corrosion failure, which seriously affects the service life of NdFeB permanent magnet and reduces the stability and reliability of the product.

[0004] At present, common NdFeB permanent magnet material anticorrosion method includes: surface coating+heat treatment, electrophoretic deposition+heat treatment, evaporation+heat treatment, magnetron sputtering+heat treatment, etc. Wherein, heat treatment is an important process to form a layer of dark blue protective layer on the surface of NdFeB magnet. By adjusting the temperature and time of heat treatment, the heavy rare earth elements on the surface are diffused to the inside of the magnet along the grain boundary to form a core-shell structure. However, the speed at which the heavy rare earth elements diffuse into the inside of the magnet from the magnet surface along the magnet grain boundary is very slow, and the diffusion time is long, and a large amount of energy needs to be consumed. The NdFeB magnet after heat treatment also needs to be cleaned, dried and other processes, and the existing blueing heat treatment equipment and cleaning and drying equipment are mostly independently arranged, and the process needs to frequently transfer materials, which is poor in continuity and low in production efficiency, and increases equipment investment and labor costs, which is not suitable for mass production. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a NdFeB cleaning, drying and bluing equipment which integrates bluing heat treatment, cleaning, dehydration and drying, has a compact structure, high production efficiency and is suitable for mass production.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a NdFeB cleaning, drying and bluing equipment, which includes a frame, a mesh belt conveyor is arranged on the frame, a feeding area is arranged in sequence along the conveying direction of the mesh belt conveyor, a bluing device for performing bluing heat treatment on NdFeB steel sheets, a first cooling device for cooling the NdFeB steel sheets after the bluing heat treatment, a cleaning device for cleaning the NdFeB steel sheets after the cooling treatment, a cold wind cutting device for scraping off moisture on the surface of the cleaned NdFeB steel sheets, a hot wind cutting device for scraping off residual moisture on the surface of the NdFeB steel sheets and preheating and drying the NdFeB steel sheets, a drying device for drying the NdFeB steel sheets and a discharging area.

[0007] As a preferred embodiment of the present invention, the bluing device includes a furnace body, a first heating rod and a second heating rod. The furnace body is provided with a first conveying channel for the conveying mesh belt of the mesh belt conveyor device to pass through. A plurality of first heating rods are provided and are embedded in the upper side wall of the first conveying channel at equal intervals along the direction of the first conveying channel. A plurality of second heating rods are provided and are embedded in the lower side wall of the first conveying channel at equal intervals along the direction of the first conveying channel.

[0008] As a preferred embodiment of the present invention, the first cooling device includes a first cooling air box and multiple first cooling fans, the first cooling fans are installed on the top of the first cooling air box, and the first cooling air box is provided with a second conveying channel for the conveying mesh belt of the mesh belt conveyor device to pass through, and the wind generated by the first cooling fan blows toward one side of the conveying mesh belt.

[0009] As a preferred embodiment of the present invention, the cleaning device includes a water tank, a first ultrasonic transducer and a second ultrasonic transducer. The water tank is provided with a third conveying channel for the conveying mesh belt of the mesh belt conveyor device to pass through. The water level of the water tank is higher than the third conveying channel. A plurality of the first ultrasonic transducers are provided and arranged in an array on the upper side of the third conveying channel. A plurality of the second ultrasonic transducers are provided and arranged in an array on the lower side of the third conveying channel.

[0010] As a preferred embodiment of the present invention, the cold air cutting device includes a first air cutting bellows, a first air knife nozzle and a first high-pressure fan. The first high-pressure fan is installed on the first air cutting bellows or the frame. The first air cutting bellows is provided with a fourth conveying channel for the conveying mesh belt of the mesh belt conveyor device to pass through. The first air knife nozzle is provided with multiple ones and are respectively arranged on the upper and lower sides of the fourth conveying channel. The first air knife nozzle is connected to the first high-pressure fan and the air knife generated by the first air knife nozzle blows toward one side of the conveying mesh belt.

[0011] As a preferred embodiment of the present invention, the hot air cutting device includes a second air cutting bellows, a second air knife nozzle, a second high-pressure fan and a first heating tube. The second high-pressure fan is installed on the second air cutting bellows or the frame. The second air cutting bellows is provided with a fifth conveying channel for the conveying mesh belt of the mesh belt conveying device to pass through. The second air knife nozzle is provided with a plurality of nozzles and are respectively arranged on the upper and lower sides of the fifth conveying channel. The second air knife nozzle is connected to the second high-pressure fan and the air knife generated by the second air knife nozzle blows toward one side of the conveying mesh belt. The first heating tube is provided with a plurality of nozzles and is arranged in the fifth conveying channel at equal distances along the direction of the fifth conveying channel.

[0012] As a preferred embodiment of the present invention, the drying device includes a drying bellows, a circulating fan, a second heating tube and a third heating tube. The drying bellows is provided with a sixth conveying channel for the conveying mesh belt of the mesh belt conveyor device to pass through. The top of the drying bellows is provided with an air inlet and a moisture dehumidification port respectively connected to the sixth conveying channel. The bottom of the drying bellows is provided with a return air port connected to the sixth conveying channel. The circulating fan is installed on the top of the drying bellows, and the air suction port of the circulating fan is connected to the return air port, and the air blowing port of the circulating fan is connected to the air inlet. A plurality of second heating tubes are provided and are arranged at equal distances along the direction of the sixth conveying channel on the upper side of the interior of the sixth conveying channel. A plurality of third heating tubes are provided and are arranged at equal distances along the direction of the sixth conveying channel on the lower side of the interior of the sixth conveying channel.

[0013] As a preferred embodiment of the present invention, the discharging area is provided with a second cooling device, the second cooling device includes a second cooling wind box and a plurality of second cooling fans, the second cooling fans are installed on the top of the second cooling wind box, the second cooling wind box is provided with a seventh conveying channel for the conveying mesh belt of the mesh belt conveyor device to pass through, the wind generated by the second cooling fan blows toward one side of the conveying mesh belt; the discharging end of the seventh conveying channel is provided with a blanking plate.

[0014] Compared with the prior art, the NdFeB cleaning, drying and bluing equipment according to the embodiment of the present invention has the following beneficial effects:

[0015] The invention integrates bluing heat treatment, cleaning, dehydration and drying, and can quickly complete the surface oxidation and cleaning treatment of NdFeB on the same production line, so that a uniform dark blue protective layer is formed on the surface of NdFeB. The invention has a compact structure, high production efficiency and is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a NdFeB cleaning, drying and bluing device provided in an embodiment of the present invention;

[0017] Figure 2 is a schematic diagram of the structure of the bluing device and the first cooling device;

[0018] Figure 3 It is a schematic diagram of the structures of a cleaning device, a cold air cutting device, a hot air cutting device and a drying device.

[0019] Markings in the figure:

[0020] 1. Frame; 2. Mesh belt conveyor; 3. Feeding area; 4. Blueing device, 41. Furnace body, 42. First heating rod, 43. Second heating rod, 44. First conveying channel, 45. First thermal insulation layer; 5. First cooling device, 51. First cooling bellows, 52. First cooling fan, 53. Second conveying channel; 6. Cleaning device, 61. Water tank, 62. First ultrasonic transducer, 63. Second ultrasonic transducer, 64. Third conveying channel; 7. Cold wind shear device, 71. First wind shear bellows, 72. First wind knife nozzle, 73. First high-pressure fan, 74. Fourth conveying channel; 8. , hot air cutting device, 81, second air cutting bellows, 82, second air knife nozzle, 83, second high-pressure fan, 84, first heating pipe, 85, fifth conveying channel, 86, second thermal insulation layer; 9, drying device, 91, drying bellows, 92, circulating fan, 93, second heating pipe, 94, third heating pipe, 95, sixth conveying channel, 96, air inlet, 97, dehumidification port, 98, return air port, 99, third thermal insulation layer; 10, discharging area; 11, second cooling device, 111, second cooling bellows, 112, second cooling fan, 113, seventh conveying channel, 114, unloading plate. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of the present invention, it should be understood that the present invention adopts the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] like Figures 1 to 3As shown, the NdFeB cleaning, drying and bluing equipment provided by the preferred embodiment of the present invention includes a frame 1, on which a mesh belt conveyor 2 is arranged, a feeding area 3, a bluing device 4 for bluing NdFeB steel sheets, a first cooling device 5 for cooling the NdFeB steel sheets after the bluing heat treatment, a cleaning device 6 for cleaning the NdFeB steel sheets after the cooling treatment, a cold wind cutting device 7 for scraping off moisture on the surface of the cleaned NdFeB steel sheets, a hot wind cutting device 8 for scraping off residual moisture on the surface of the NdFeB steel sheets and preheating and drying the NdFeB steel sheets, a drying device 9 for drying the NdFeB steel sheets and a discharging area 10 are arranged in sequence on the mesh belt conveyor 2 along its conveying direction. It can be seen that the NdFeB cleaning, drying and bluing equipment in the embodiment of the present invention integrates bluing heat treatment, cleaning, dehydration and drying, and can quickly complete the surface oxidation and cleaning treatment of NdFeB on the same production line, so that a uniform dark blue protective layer is formed on the surface of NdFeB. It has a compact structure, high production efficiency, and is suitable for mass production.

[0024] Exemplarily, the bluing device 4 includes a furnace body 41, a first heating rod 42 and a second heating rod 43. The furnace body 41 is provided with a first conveying channel 44 (i.e., a channel formed by the furnace inner shell) through which the conveying mesh belt of the mesh belt conveying device 2 can pass. The first heating rod 42 is provided in plurality and is embedded in the upper side wall of the first conveying channel 44 at equal intervals along the direction of the first conveying channel 44. The second heating rod 43 is provided in plurality and is embedded in the lower side wall of the first conveying channel 44 at equal intervals along the direction of the first conveying channel 44. Thus, when the first heating rod 42 and the second heating rod 43 are powered on for heating, the heat of the heating rods can be quickly and evenly transferred to the entire first conveying channel 44 space by utilizing the large thermal conductivity and good thermal conductivity of the furnace inner shell, so that the upper and lower surfaces of the NdFeB steel sheet are evenly heated, shortening the heat treatment time, reducing energy consumption, and the protective layer formed on the surface has a good bluing effect and stable anti-corrosion performance. It should also be noted that, since the heating rod is embedded in the side wall of the first conveying channel 44 (ie, the side wall of the furnace inner tank), it will not come into contact with the corrosive air in the first conveying channel 44, thereby ensuring the service life of the heating rod.

[0025] Furthermore, in order to reduce the heat loss of the furnace body 41 , a first thermal insulation layer 45 covering the outer periphery of the first conveying channel 44 is provided in the furnace body 41 ; first thermal insulation curtains or thermal insulation movable doors are provided at both end ports of the first conveying channel 44 .

[0026] Furthermore, in order to make the heating temperature of the furnace body 41 meet different process requirements, the furnace body 41 is composed of multiple sections of furnace body 41 units spliced ​​in sequence, each section of the furnace body 41 unit is independently temperature controlled, and the temperature of each section of the furnace body 41 unit can be arbitrarily adjusted between room temperature and 500 degrees Celsius.

[0027] Exemplarily, the first cooling device 5 includes a first cooling air box 51 and a plurality of first cooling fans 52, wherein the first cooling fans 52 are installed on the top of the first cooling air box 51, and a second conveying channel 53 is provided in the first cooling air box 51 for the conveying mesh belt of the mesh belt conveyor device 2 to pass through, and the wind generated by the first cooling fan 52 blows toward one side of the conveying mesh belt, thereby cooling the NdFeB steel sheet after the bluing heat treatment.

[0028] Furthermore, the plurality of the first cooling fans 52 are arranged in an array according to the area of ​​the cooling region to ensure uniform cooling of the NdFeB steel sheet.

[0029] Exemplarily, the cleaning device 6 includes a water tank 61, a first ultrasonic transducer 62 and a second ultrasonic transducer 63. The water tank 61 is provided with a third conveying channel for the conveying mesh belt of the mesh belt conveying device 2 to pass through. The water level of the water tank 61 is higher than the third conveying channel 64. The first ultrasonic transducer 62 is provided in plurality and arranged in an array on the upper side of the third conveying channel 64. The second ultrasonic transducer 63 is provided in plurality and arranged in an array on the lower side of the third conveying channel 64. Thus, by providing the first ultrasonic transducer 62 and the second ultrasonic transducer 63, ultrasonic waves are used to disperse, emulsify and peel off the dirt on the upper and lower surfaces of the NdFeB steel sheet, thereby achieving the purpose of sufficient and thorough cleaning.

[0030] Furthermore, the water tank 61 is connected to a water inlet system, a water drainage system and a water circulation system. The water inlet system includes a water inlet valve, a water inlet pipe, a water level gauge and other components, which are used to replenish water into the water tank 61 in time to ensure the water level in the water tank 61; the drainage system includes a drainage valve, a drainage pipe, a timer and the like, which are used to discharge the dirt deposited at the bottom of the water tank 61 at a fixed time; the water circulation system includes a water pump, a circulation pipe, a filter, a heat exchanger and the like, which are used to filter and cool the water in the water tank 61 and reuse it in the water tank 61, so as to save water resources and achieve the purpose of emission reduction.

[0031] Exemplarily, the cold air shearing device 7 includes a first air shearing bellows 71, a first air knife nozzle 72 and a first high-pressure fan 73. The first high-pressure fan 73 is installed on the first air shearing bellows 71 or the frame 1. The first air shearing bellows 71 is provided with a fourth conveying channel 74 for the conveying mesh belt of the mesh belt conveyor device 2 to pass through. The first air knife nozzle 72 is provided with multiple ones and is respectively arranged on the upper and lower sides of the fourth conveying channel 74. The first air knife nozzle 72 is connected to the first high-pressure fan 73 and the air knife generated by the first air knife nozzle 72 blows toward one side of the conveying mesh belt, thereby using the air knife to scrape off the moisture on the upper and lower surfaces of the NdFeB steel sheet after cleaning, thereby achieving rapid dehydration.

[0032] Exemplarily, the hot air cutting device 8 includes a second air cutting bellows 81, a second air knife nozzle 82, a second high-pressure fan 83 and a first heating tube 84. The second high-pressure fan 83 is installed on the second air cutting bellows 81 or the frame 1. The second air cutting bellows 81 is provided with a fifth conveying channel 85 for the conveying mesh belt of the mesh belt conveyor device 2 to pass through. The second air knife nozzle 82 is provided with multiple ones and is respectively arranged on the upper and lower sides of the fifth conveying channel 85. The second air knife nozzle 82 is connected to the second high-pressure fan 83 and the air knife generated by the second air knife nozzle 82 blows toward one side of the conveying mesh belt, so that the wind knife is used to scrape off the remaining moisture on the upper and lower surfaces of the NdFeB steel sheet after cleaning, thereby achieving further dehydration. At the same time, the first heating tube 84 is provided in plurality and is arranged in the fifth conveying channel 85 at equal intervals along the direction of the fifth conveying channel 85, so that the inside of the fifth conveying channel 85 can be heated by the first heating tube 84, which is beneficial to evaporating the residual moisture on the upper and lower surfaces of the NdFeB steel sheet on the one hand, and can preheat the NdFeB steel sheet on the other hand, which is beneficial to the subsequent drying process.

[0033] Furthermore, in order to reduce the heat loss of the second wind shearing bellows 81 , a second thermal insulation layer 86 covering the outer periphery of the fifth conveying passage 85 is provided in the second wind shearing bellows 81 .

[0034] Exemplarily, the drying device 9 includes a drying bellows 91, a circulating fan 92, a second heating pipe 93 and a third heating pipe 94. The drying bellows 91 is provided with a sixth conveying channel 95 for the conveying mesh belt of the mesh belt conveyor device 2 to pass through. The top of the drying bellows 91 is provided with an air inlet 96 and a moisture removal port 97 respectively connected to the sixth conveying channel 95. The bottom of the drying bellows 91 is provided with a return air port 98 connected to the sixth conveying channel 95. The circulating fan 92 is installed on the top of the drying bellows 91, and the air suction port of the circulating fan 92 is connected to the return air port 98, and the air blowing port of the circulating fan 92 is connected to the air inlet 96. The second heating pipe 93 is provided in plurality and is arranged at equal distances along the direction of the sixth conveying channel 95 on the upper side of the inner part of the sixth conveying channel 95. The third heating pipe 94 is provided in plurality and is arranged at equal distances along the direction of the sixth conveying channel 95 on the lower side of the inner part of the sixth conveying channel 95. Therefore, when the second heating tube 93 and the third heating tube 94 are powered on for heating, the heat of the second heating tube 93 is transferred from top to bottom to the upper surface of the NdFeB steel sheet, and the heat of the third heating tube 94 is transferred from bottom to top to the lower surface of the NdFeB steel sheet, so that the upper and lower surfaces of the NdFeB steel sheet are heated evenly and the remaining moisture on the surface is evaporated quickly; at the same time, through the setting of the circulating fan 92, the air in the sixth conveying channel 95 can be circulated, moisture is quickly taken away, the drying time is shortened, and energy consumption is reduced.

[0035] Furthermore, the circulating fans 92 are provided in plurality and arranged in an array according to the area of ​​the drying region to ensure uniform drying of the NdFeB steel sheets.

[0036] Furthermore, in order to reduce the heat loss of the drying bellows 91 , a third thermal insulation layer 99 is provided inside the drying bellows 91 and wrapped around the outer periphery of the sixth conveying channel 95 ; a second thermal insulation curtain or a thermal insulation movable door is provided at the discharge port of the sixth conveying channel 95 .

[0037] Exemplarily, the discharging area 10 is provided with a second cooling device 11, and the second cooling device 11 includes a second cooling wind box 111 and a plurality of second cooling fans 112. The second cooling fans 112 are installed on the top of the second cooling wind box 111. The second cooling wind box 111 is provided with a seventh conveying channel 113 for the conveying mesh belt of the mesh belt conveyor device 2 to pass through. The wind generated by the second cooling fan 112 blows toward one side of the conveying mesh belt, thereby cooling the dried NdFeB steel sheet.

[0038] Furthermore, a plurality of the second cooling fans 112 are arranged in an array according to the area of ​​the cooling region to ensure uniform cooling of the NdFeB steel sheet.

[0039] Furthermore, a discharge plate 114 inclined downward is provided at the discharge end of the seventh conveying channel 113 to facilitate discharge of materials.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A neodymium iron boron cleaning, drying and bluing equipment, characterized in that: The invention comprises a frame, wherein a mesh belt conveyor is provided on the frame, a feeding area, a bluing device for bluing NdFeB steel sheets, a first cooling device for cooling the NdFeB steel sheets after bluing heat treatment, a cleaning device for cleaning the NdFeB steel sheets after cooling treatment, a cold wind shearing device for scraping off moisture on the surface of the cleaned NdFeB steel sheets, a hot wind shearing device for scraping off residual moisture on the surface of the NdFeB steel sheets and preheating and drying the NdFeB steel sheets, a drying device for drying the NdFeB steel sheets, and a discharging area; The blueing device comprises a furnace body, a first heating rod and a second heating rod. A first conveying channel for the conveying mesh belt of the mesh belt conveying device to pass through is provided in the furnace body. A plurality of first heating rods are provided and are embedded in the upper side wall of the first conveying channel at equal intervals along the direction of the first conveying channel. A plurality of second heating rods are provided and are embedded in the lower side wall of the first conveying channel at equal intervals along the direction of the first conveying channel. The furnace body is formed by sequentially splicing a plurality of furnace body units, each of which is independently temperature-controlled, and the temperature of each furnace body unit can be arbitrarily adjusted between room temperature and 500 degrees Celsius. The cold air shear device comprises a first wind shear bellows, a first wind knife nozzle and a first high-pressure blower, wherein the first high-pressure blower is mounted on the first wind shear bellows or the frame, a fourth conveying channel for the conveying mesh belt of the mesh belt conveying device to pass through is provided in the first wind shear bellows, a plurality of the first wind knife nozzles are provided and are respectively arranged on the upper and lower sides of the fourth conveying channel, the first wind knife nozzle is connected to the first high-pressure blower and the wind knife generated by the first wind knife nozzle blows toward one side of the conveying mesh belt; The hot air shear device comprises a second air shear wind box, a second air knife nozzle, a second high-pressure blower and a first heating pipe, wherein the second high-pressure blower is mounted on the second air shear wind box or the frame, a fifth conveying channel is provided in the second air shear wind box for the conveying mesh belt of the mesh belt conveying device to pass through, a plurality of second air knife nozzles are provided and are respectively arranged on the upper and lower sides of the fifth conveying channel, the second air knife nozzles are connected to the second high-pressure blower and the air knife generated by the second air knife nozzles blows toward one side of the conveying mesh belt; a plurality of first heating pipes are provided and are arranged in the fifth conveying channel at equal intervals along the direction of the fifth conveying channel; The drying device includes a drying bellows, a circulating fan, a second heating pipe and a third heating pipe. The drying bellows is provided with a sixth conveying channel for the conveying mesh belt of the mesh belt conveyor device to pass through. The top of the drying bellows is provided with an air inlet and a moisture dehumidification port respectively connected with the sixth conveying channel. The bottom of the drying bellows is provided with a return air port connected with the sixth conveying channel. The circulating fan is installed on the top of the drying bellows, and the air suction port of the circulating fan is connected with the return air port, and the air blowing port of the circulating fan is connected with the air inlet. A plurality of second heating pipes are provided and are arranged at equal distances along the direction of the sixth conveying channel on the upper side of the interior of the sixth conveying channel. A plurality of third heating pipes are provided and are arranged at equal distances along the direction of the sixth conveying channel on the lower side of the interior of the sixth conveying channel.

2. The NdFeB cleaning, drying and bluing equipment according to claim 1, characterized in that: The first cooling device includes a first cooling air box and multiple first cooling fans. The first cooling fan is installed on the top of the first cooling air box. A second conveying channel is provided in the first cooling air box for the conveying mesh belt of the mesh belt conveyor device to pass through. The wind generated by the first cooling fan blows toward one side of the conveying mesh belt.

3. The NdFeB cleaning, drying and bluing equipment according to claim 1, characterized in that: The cleaning device includes a water tank, a first ultrasonic transducer and a second ultrasonic transducer. The water tank is provided with a third conveying channel for the conveying mesh belt of the mesh belt conveying device to pass through. The water level of the water tank is higher than the third conveying channel. The first ultrasonic transducers are provided in plurality and arranged in an array on the upper side of the third conveying channel. The second ultrasonic transducers are provided in plurality and arranged in an array on the lower side of the third conveying channel.

4. The NdFeB cleaning, drying and bluing equipment according to claim 1, characterized in that: The discharging area is provided with a second cooling device, which includes a second cooling wind box and multiple second cooling fans. The second cooling fans are installed on the top of the second cooling wind box. The second cooling wind box is provided with a seventh conveying channel for the conveying mesh belt of the mesh belt conveyor device to pass through. The wind generated by the second cooling fan blows toward one side of the conveying mesh belt; the discharging end of the seventh conveying channel is provided with a blanking plate.

5. The NdFeB cleaning, drying and bluing equipment according to claim 3, characterized in that: The water tank is connected with a water inlet system for timely replenishing water into the water tank, a drainage system for regularly discharging dirt deposited at the bottom of the water tank, and a water circulation system for filtering and cooling the water in the water tank and repeatedly recycling it to the water tank.

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