A spraying device and method for grain boundary diffusion of NdFeB magnets

Abstract

The present invention belongs to the technical field of magnet production, and relates to a spraying device and method for grain boundary diffusion of NdFeB magnets, including a frame and a grabbing and rotating unit, the frame is provided with a grabbing and lifting unit, the grabbing and lifting unit is provided with a support disk, and one of the two grabbing and rotating units is also provided with a support disk; the grabbing and rotating unit includes a mounting plate 1 connected to the slide table and an electric slide rail 2 installed on the mounting plate 1, the sliding part of the electric slide rail 2 is connected to the support plate, a servo motor is installed on one side of the support plate, an insertion frame is connected to the output shaft of the servo motor, and both sides of the support disk have jacks. After the first side of the magnet is sprayed, the spraying and turning over of the magnet are automatically performed at the same position, and the magnet is sprayed again after turning over. The layout is compact and reasonable, and multiple assembly line-type conveying is not required, which saves unnecessary conveying steps, greatly improves the working efficiency of the spraying, and the device occupies a small area.

Description

Technical Field

[0001] The invention belongs to the technical field of magnet production, and in particular relates to a spraying device and method for grain boundary diffusion of a neodymium iron boron magnet. Background Art

[0002] With the continuous expansion of sintered NdFeB magnets in the field of application, the products are developing towards lightness, thinness, miniaturization and high performance, and the requirements for the magnetic energy product, coercive force and performance consistency of magnets are getting higher and higher. The performance of magnets can be improved by spraying materials on the surface.

[0003] The mainstream automated diffusion coating methods in the industry are: magnetron sputtering, screen printing, and surface spraying. Among them, magnetron sputtering has the advantages of good coating uniformity, dense film layer, and stable coercivity enhancement effect, but the equipment is expensive and the target material utilization rate is low, so the cost is high;

[0004] Screen printing has the characteristics of high production efficiency, high utilization rate of heavy rare earth, good consistency of weight gain, etc. It is suitable for grain boundary diffusion of square magnetic steel. The disadvantage is that this method usually requires corresponding slurry, screen printing plate and fixture for products of different sizes and weight gain ratios, and the cost of the matching fixture is high;

[0005] Automatic spraying production is highly flexible and can produce products of various shapes and sizes. It has high production efficiency, the weight gain ratio of heavy rare earths can be precisely controlled, and the equipment cost is low, so it has a wide range of applications.

[0006] For example, the patent with patent announcement number CN114733691B discloses a spraying device and a double-sided spraying production line for magnetic cores. When in use, the spraying device and the double-sided spraying production line for magnetic cores first transport the magnet to the front spraying platform for spraying through the front conveyor belt, and then transport the magnet to the left flipping device for flipping and transporting it to the rear conveyor belt. After flipping, the magnet is transported to the rear spraying platform for spraying through the rear conveyor belt. Three main conveying lines are required to complete the conveying process. The conveying process greatly reduces the work efficiency, and efficient double-sided spraying cannot be achieved. In addition, the equipment occupies a large area.

[0007] In view of the shortcomings of the above-mentioned prior art, a spraying device and method for grain boundary diffusion of NdFeB magnets with high working efficiency is designed to overcome the shortcomings of the prior art, which can realize efficient double-sided spraying and eliminate unnecessary conveying process by immediately turning the magnet over after spraying one side of the magnet. Summary of the invention

[0008] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide a high-efficiency NdFeB magnet grain boundary diffusion spraying device and method, which can turn the magnet over immediately after spraying one side of the magnet, thereby achieving efficient double-sided spraying and eliminating unnecessary conveying processes.

[0009] In order to solve the above technical problems, the present invention provides a spraying device for grain boundary diffusion of NdFeB magnets, comprising a base, a frame connected to the upper side of the base, a spraying unit arranged on the frame and two front and rear opposite electric guide rails installed on the upper side of the base, the electric guide rails are located below the spraying unit, the slides of the two electric guide rails are provided with grabbing and rotating units, the frame is provided with a grabbing and lifting unit located above the spraying unit, the grabbing and lifting unit is provided with a support plate, the grabbing and lifting unit is used to grab the support plate and drive the support plate to rise and fall, one of the two grabbing and rotating units is also provided with a support plate, the grabbing and rotating unit is used to grab the support plate and drive the support plate to rise and fall Rotate, one side of the support disk has a raised soft enclosure portion, the enclosure portion surrounds the support disk to form a receiving groove for placing the magnet to be sprayed, the enclosure portion of the support disk on the grabbing and rotating unit is located on the upper side of the support disk, and the enclosure portion of the support disk on the grabbing and lifting unit is located on the lower side of the support disk; the grabbing and rotating unit includes a mounting plate 1 connected to the upper side of the slide and two left and right opposite electric slide rails 2 installed on the upper side of the mounting plate 1, a support plate is connected between the sliding parts of the two electric slide rails 2, a servo motor is installed on the side of the support plate away from the spraying unit, and an insertion rack close to the spraying unit is connected to the output shaft of the servo motor, and the front and rear sides of the support disk are provided with sockets for inserting the insertion rack.

[0010] Preferably, the grabbing and rotating unit further comprises: an insertion rack having an insertion rod suitable for inserting into the socket of the support plate, the front insertion rack being suitable for driving the insertion rod to move backward and insert into the socket of the support plate, and the insertion rods on the front and rear insertion racks are opposite to each other up and down.

[0011] Preferably, the grabbing and rotating unit also includes a clamping rod sliding on the insertion frame, and two front and rear opposite springs are connected between the clamping rod and the insertion frame, and the springs are used to reset the movable clamping rod, and the clamping rod is close to the insertion rod so as to cooperate in clamping the support plate under the action of the spring. The end of the clamping rod close to the grabbing and lifting unit is bent at a predetermined angle, the rear end of the front clamping rod is bent downward, and the front end of the rear clamping rod is bent upward.

[0012] Preferably, the spraying unit includes two front and rear opposite guide rails connected to the frame, the grabbing and lifting unit is located above the two guide rails, a slider slides on the left end of the guide rail, an electric slide is installed between the two slides, and a spray gun for an external hose to transport the spray material is installed on the sliding part of the electric slide; the slider is driven by a driving assembly to slide along the guide rail, and the driving assembly is arranged on the frame.

[0013] Preferably, the driving assembly includes an electric screw installed on the front part of the frame, the front side of the front slider is connected to a transmission plate, and the electric screw is threadedly connected to the transmission plate.

[0014] Preferably, the grabbing and lifting unit includes a mounting plate 2 connected to the frame, an electric push rod is installed on the mounting plate 2, the telescopic rod of the electric push rod is connected to a lifting frame that slides on the mounting plate 2, the lifting frame is located above between the two guide rails 1, and four electric suction cups are installed at the bottom of the lifting frame, which are used to adsorb the support plate.

[0015] Preferably, it also includes two front and rear connecting plates connected to one side of the frame, a support rail suitable for supporting the support plate is connected to the connecting plate, and lifting parts are protruding on the front and rear sides of the support plate, and the lifting parts are used to be placed on the support rail, and a limiting rod located on one side of the support rail is connected to the connecting plate, and the limiting rod is located at a position of the support rail away from the base.

[0016] Preferably, it also includes two front and rear opposite connecting plates 2 connected to the frame, the connecting plate 2 is located on the side of the frame away from the connecting plate 1, the connecting plate 2 is connected to a support rail 2 suitable for supporting the support plate, the structure of the support rail 2 is the same as that of the support rail 1, after the magnet spraying is completed, the connecting plate 2 is connected to a limit rod 2 located on one side of the support rail 2, the structure of the limit rod 2 is the same as that of the limit rod 1, and the limit rod 2 is located at a position of the support rail 2 away from the base.

[0017] The present invention provides a spraying method applied to the above-mentioned spraying equipment, comprising: S1) one of the two grabbing and rotating units grabs a support plate on which a magnet to be sprayed is placed on the upper side; S2) the grabbing and rotating unit drives the support plate to move below the spraying unit so that the spraying unit sprays the magnet on the support plate; S3) the grabbing and lifting unit drives the other support plate to move downward to clamp the magnet in the support plate on the grabbing and rotating unit; S4) the two grabbing and rotating units synchronously drive the magnets in the two support plates to turn over; S5) the spraying unit sprays the turned magnets again.

[0018] The present invention overcomes the shortcomings of the prior art and can achieve the following beneficial effects:

[0019] 1. After the first side of the magnet is sprayed, the spraying and turning over of the magnet are automatically carried out at the same position, and then spraying is carried out again after turning over. The layout is compact and reasonable, and multiple assembly line conveying is not required, which saves unnecessary conveying steps, greatly improves the work efficiency of spraying, and the device occupies a small area.

[0020] 2. When the insertion frame drives the insertion rod to be inserted into the socket of the support plate, the bent end of the clamping rod will be squeezed by the support plate, and then the clamping rod will cooperate with the insertion rod to clamp the support plate under the action of the spring, so as to improve stability and prevent the support plate from being accidentally offset by external force.

[0021] 3. The second support rail supports the support plate and the magnet to be sprayed on the support plate; the blocking of the rear support rail 1 allows the clamping rod to be smoothly squeezed and clamp the support plate under the action of the spring; the blocking of the rear support rail 2 allows the clamping rod to smoothly release the support plate, and the support function is cleverly used to assist the automatic clamping operation of the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an assembly schematic diagram of the present invention.

[0023] Figure 2 This is the front view of the present invention, wherein the frame is fully cut away.

[0024] Figure 3 Schematic diagram of the support plate of the present invention.

[0025] Figure 4 It is a schematic diagram of the slide and the grabbing and rotating unit of the present invention.

[0026] Figure 5 It is a schematic diagram of the insertion frame, the insertion rod and the clamping rod of the present invention.

[0027] Figure 6 This is a full cross-sectional view of the support plate of the present invention as viewed from the right, wherein the two support plates are in a merged state.

[0028] Figure 7 It is a schematic diagram of the grabbing and lifting unit of the present invention.

[0029] Figure 8 It is a schematic diagram of the positional relationship between the grabbing lifting unit and the grabbing rotating unit of the present invention.

[0030] Fig. 9 It is a schematic diagram of a connecting plate 1, a supporting rail 1 and a limiting rod 1 of the present invention.

[0031] The marks in the accompanying drawings provided by the present invention are: 1-base, 11-frame, 12-support plate, 120-jack, 121-enclosure, 2-spraying unit, 21-guide rail one, 211-slider one, 22-electric slide rail one, 23-spray gun, 24-transmission plate, 25-electric screw, 31-electric guide rail, 32-slide, 4-grabbing rotation unit, 41-mounting plate one, 42-electric slide rail two, 43-support plate, 44-servo motor, 45-insertion frame, 46-insertion rod, 461-clamping rod, 462-spring, 5-grabbing lifting unit, 51-mounting plate two, 52-electric push rod, 53-lifting frame, 54-electric suction cup, 61-connecting plate one, 62-support rail one, 63-limiting rod one, 64-connecting plate two, 65-support rail two. DETAILED DESCRIPTION

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0033] In addition, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. It should be noted that the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] A spraying device for grain boundary diffusion of NdFeB magnets, such as Figure 1-Figure 4As shown, it includes a base 1, a frame 11 connected to the upper side of the base 1, a spraying unit 2 arranged on the frame 11, and two front-to-rear opposite electric guide rails 31 installed on the upper side of the base 1, the electric guide rail 31 is located below the spraying unit 2, and the slides 32 of the two electric guide rails 31 are each provided with a grabbing and rotating unit 4, the frame 11 is provided with a grabbing and lifting unit 5 located above the spraying unit 2, the grabbing and lifting unit 5 is provided with a support plate 12, the grabbing and lifting unit 5 is used to grab the support plate 12 and drive the support plate 12 to rise and fall, one of the two grabbing and rotating units 4 is also provided with a support plate 12, the grabbing and rotating unit 4 is used to grab the support plate 12 and drive the support plate 12 to rotate, and one side of the support plate 12 has a raised soft The enclosure 121 surrounds the support disk 12 to form a receiving groove for placing the magnet to be sprayed. The enclosure 121 of the support disk 12 on the grabbing and rotating unit 4 is located on the upper side of the support disk 12, and the enclosure 121 of the support disk 12 on the grabbing and lifting unit 5 is located on the lower side of the support disk 12. Initially, under the drive of the electric guide rail 31, the front grabbing and rotating unit 4 grabs the support disk 12 with the magnet placed on the upper side and moves it to the bottom of the spraying unit 2, and the support disk 12 on the front grabbing and rotating unit 4 corresponds to the support disk 12 on the grabbing and lifting unit 5. The spraying unit 2 is controlled to spray the magnet on the support disk 12 with material (such as an organic coating, an inorganic coating, and a composite coating). After the spraying is completed, the spraying unit 2 is controlled to spray the magnet on the support disk 12. 2 reset, then control the grabbing and lifting unit 5 to drive the support plate 12 thereon to move down to the upper side of the support plate 12 on the grabbing and rotating unit 4, at this time, the enclosure parts 121 of the two support plates 12 fit each other, so as to cooperate to clamp the magnet on one side that has been sprayed, and then control the rear grabbing and rotating unit 4 to grab the support plate 12 on the grabbing and lifting unit 5, and control the grabbing and lifting unit 5 to move up and reset to the avoidance position for the subsequent magnet flipping step. When flipping, control the two grabbing and rotating units 4 to synchronously drive the two support plates 12 to rotate 180 degrees, so as to flip the magnet on one side that has been sprayed, and the support plate 12 originally grabbed by the front grabbing and rotating unit 4 will be replaced to the upper side of the support plate 12 grabbed by the rear grabbing and rotating unit 4, and the magnet on which one side has been sprayed will also be removed from The support disk 12 on the front grabbing rotating unit 4 is replaced with the support disk 12 on the rear grabbing rotating unit 4. At this time, the grabbing lifting unit 5 is controlled to move down to grab the upper support disk 12, and the front grabbing rotating unit 4 is controlled to release the upper support disk 12 so that the grabbing lifting unit 5 can drive the support disk 12 to move up and retract to the spraying operation avoidance position of the spraying unit 2, and then the spraying unit 2 is controlled to spray the magnet in the support disk 12 on the rear grabbing rotating unit 4 to complete the double-sided spraying operation, and the spraying and turning of the magnet are automatically performed at the same position, the layout is compact and reasonable, and there is no need for multiple assembly line-type conveying, which eliminates unnecessary conveying steps, greatly improves the working efficiency of spraying, and the device occupies a small area;

[0035] After the magnet is sprayed on both sides, the rear grabbing and rotating unit 4 grabs the support plate 12 with the magnet placed on the upper side and moves it away from the left below the spraying unit 2. At the same time, the front grabbing and rotating unit 4 grabs the next support plate 12 again to drive the new magnet to work. In this way, the two grabbing and rotating units 4 are used alternately to further improve the work efficiency. The grabbing and rotating unit 4 includes a mounting plate 41 connected to the upper side of the slide 32 and two left and right opposite electric slide rails 42 installed on the upper side of the mounting plate 41. A support plate 43 is connected between the sliding parts of the two electric slide rails 42. A servo motor 44 is installed on the side of the support plate 43 away from the spraying unit 2. The output shaft of the servo motor 44 is connected to an insertion frame 45 close to the spraying unit 2. The front and rear sides of the support plate 12 have insertion racks for insertion. Insert the socket 120 of the rack 45. Initially, if the front grabbing and rotating unit 4 needs to grab the support disk 12 with a magnet placed on the upper side, the socket 120 on the support disk 12 is inserted into the front insertion rack 45, and the front electric slide rail 2 42 is controlled to drive the support plate 43 to drive the servo motor 44 to move backward. The servo motor 44 will drive the insertion rack 45 to move backward and insert it into the socket 120 on the support disk 12, so as to realize the grabbing and rotating unit 4 to grab the support disk 12; the grabbing and rotating unit 4 of the rear grabbing and lifting unit 5 The grabbing operation of the support disk 12 on the grabbing and lifting unit 5 is similar, and the rear electric slide rail 2 42 is controlled to drive the support plate 43 to drive the servo motor 44 to move forward, so that the servo motor 44 drives the insertion rack 45 to move forward and insert it into the socket 120 of the support disk 12 on the grabbing and lifting unit 5.

[0036] When it is necessary to flip the magnet, the two servo motors 44 are controlled to synchronously drive the two insertion racks 45 to drive the two support disks 12 to rotate 180 degrees; then when the grabbing and lifting unit 5 grabs the upper support disk 12 after flipping, the front electric slide rail 42 is controlled to drive the support plate 43 to drive the servo motor 44 to move forward, so that the front insertion rack 45 releases the upper support disk 12 so that the grabbing and lifting unit 5 can drive the support disk 12 to move up and retract; it should be explained that in this spraying equipment, the grabbing and rotating unit 4 can receive the support disk 12 and the magnet from the upper right of the base 1, and then transport them to the left for spraying and remove the support disk 12 and the magnet after spraying is completed, and the grabbing and rotating unit 4 can receive the support disk 12 magnet from the upper left of the base 1, and then transport them to the right for spraying and remove the support disk 12 and the magnet after spraying is completed.

[0037] like Figure 4-Figure 6As shown, the grabbing and rotating unit 4 also includes: an insertion frame 45 having an insertion rod 46 suitable for inserting into the insertion hole 120 of the support plate 12, the front insertion frame 45 is suitable for driving the insertion rod 46 to move backward and insert into the insertion hole 120 of the support plate 12, and the insertion rods 46 on the front and rear insertion frames 45 are opposite to each other up and down; specifically, under the control of the servo motor 44, the insertion rod 46 on the front insertion frame 45 is located at the lower part of the insertion frame 45 (such as Figure 6 ), so initially the support plate 12 with the magnet placed on the upper side is supported by the insertion rod 46 on the front insertion frame 45. At this time, the front insertion frame 45 does not affect the spraying operation of the magnet and the operation of the grabbing and lifting unit 5 to drive the upper support plate 12 to move downward; and the insertion rod 46 on the rear insertion frame 45 is located at the upper part of the insertion frame 45. When the grabbing and lifting unit 5 drives the upper support plate 12 to move down to the upper side of the support plate 12 on the front grabbing and rotating unit 4, the rear electric slide rail 42 can be controlled to drive the insertion rod 46 on the rear insertion frame 45 to move forward and insert into the socket 120 of the support plate 12 on the grabbing and lifting unit 5, and then the two servo motors 44 are controlled to perform the flipping operation of the two support plates 12.

[0038] like Figure 5 and Figure 6 As shown, the grabbing and rotating unit 4 also includes a clamping rod 461 that slides on the insertion frame 45, and two front and rear opposite springs 462 are connected between the clamping rod 461 and the insertion frame 45. The spring 462 is used to reset the movable clamping rod 461, and the clamping rod 461 is close to the insertion rod 46 so as to be suitable for clamping the support plate 12 under the action of the spring 462. The clamping rod 461 is bent at a predetermined angle at one end close to the grabbing and lifting unit 5. Specifically, the rear end of the front clamping rod 461 is bent downward, and the front end of the rear clamping rod 461 is bent upward. In the process that the front insertion frame 45 drives the insertion rod 46 to move backward and insert it into the socket 120 of the support plate 12, the front The bent end of the square clamp rod 461 will be squeezed by the support plate 12, and then the clamp rod 461 will cooperate with the insertion rod 46 to clamp the support plate 12 under the action of the spring 462, so as to improve the stability and prevent the support plate 12 from being accidentally displaced by external force; when the rear insertion frame 45 drives the insertion rod 46 to insert into the socket 120 of the support plate 12 on the grabbing and lifting unit 5, the rear clamp rod 461 will cooperate with the insertion rod 46 to clamp the support plate 12 under the action of the spring 462; and because the clamp rod 461 is not rigidly fixed, the support plate 12 can be removed from the insertion rod 46 by directly applying a pulling force, and the clamp rod 461 will be reset under the action of the spring 462.

[0039] like Figure 2 and Figure 7As shown, the spraying unit 2 includes two front-to-back opposite guide rails 21 connected to the frame 11, the grabbing and lifting unit 5 is located above the two guide rails 21, a slider 211 slides on the left end of the guide rail 21, an electric slide rail 22 is installed between the two slide rails 211, and a spray gun 23 for an external hose to transport the spray material is installed on the sliding part of the electric slide rail 22. When the grabbing and rotating unit 4 drives the support plate 12 magnet to move to the bottom of the guide rail 21, the slider 211 drives the electric slide rail 22 to move right along the guide rail 21, so as to adjust the spraying position of the spray gun 23 in the left and right directions, and the electric slide rail 22 is controlled to drive the spray gun 23 to move forward and backward to adjust the spraying position of the spray gun 23 in the front and rear directions; the slider 211 is driven by the driving component to slide along the guide rail 21, and the driving component is arranged on the frame 11.

[0040] like Figure 2 and Figure 7 As shown, the driving assembly includes an electric lead screw 25 installed on the front part of the frame 11, and the front side of the front slider 211 is connected to the transmission plate 24. The electric lead screw 25 is threadedly connected to the transmission plate 24. Controlling the electric lead screw 25 can drive the transmission plate 24 to drive the slider 211 to move right, thereby driving the slider 211 to move the spray gun 23 to move right through the electric slide rail 22 for spraying.

[0041] like Figure 2 and Figure 8 As shown, the grabbing and lifting unit 5 includes a mounting plate 51 connected to the frame 11, an electric push rod 52 is installed on the mounting plate 51, and a lifting frame 53 sliding on the mounting plate 51 is connected to the telescopic rod of the electric push rod 52. The lifting frame 53 is located above between the two guide rails 21, and four electric suction cups 54 are installed at the lower part of the lifting frame 53. The electric suction cups 54 are used to adsorb the support plate 12. The electric push rod 52 is controlled to drive the lifting frame 53 to drive the electric suction cups 54 to move downward, so that the adsorbed support plate 12 can be driven to the upper side of the support plate 12 on the grabbing and rotating unit 4, so that the enclosures 121 on the two support plates 12 are fitted with each other. Similarly, the electric push rod 52 is controlled to drive the lifting frame 53 to drive the electric suction cups 54 to move upward, so that the adsorbed support plate 12 can be driven to move upward and retracted.

[0042] like Figure 1 and Fig. 9As shown, it also includes two front-to-back connecting plates 61 connected to one side (right side) of the frame 11, and a supporting rail 62 suitable for supporting the supporting plate 12 is connected to the connecting plate 61. The supporting plate 12 with the magnet to be sprayed on the upper side is placed between the two supporting rails 62, so that there is no need for manual continuous picking up of the supporting plate 12, and it is automatically centered in the front and rear directions, and then the electric guide rail 31 is controlled to drive the front grabbing and rotating unit 4 to move right to the front of the supporting rail 62, and then the front electric slide rail 42 is controlled to drive the front insertion rod 46 to move backward and insert into the supporting rail In the insertion hole 120 of the support plate 12 on the support rail 62, due to the obstruction of the rear support rail 62, the clamping rod 461 can be smoothly squeezed and clamp the support plate 12 under the action of the spring 462, and the front and rear sides of the support plate 12 are protruding with lifting parts, which are used to be placed on the support rail 62. The connecting plate 61 is connected to a limiting rod 63 located on one side of the support rail 62, and the limiting rod 63 is located at a position where the support rail 62 is away from the base 1, and the limiting rod 63 is used to limit and position the rightmost position of the support plate 12 on the support rail 62.

[0043] like Figure 1 and Fig. 9 As shown, it also includes two front and rear opposite connecting plates 64 connected to the frame 11, the connecting plate 64 is located on the side (left side) of the frame 11 away from the connecting plate 1 61, and the connecting plate 64 is connected to a supporting rail 65 suitable for supporting the support plate 12. The structure of the supporting rail 65 is the same as that of the supporting rail 1 62. After the magnet spraying is completed, the electric guide rail 31 is controlled to drive the rear grabbing and rotating unit 4 to drive the support plate 12 to move left to the supporting rail 65. The supporting rail 65 will support the support plate 12 and the magnet on the support plate 12, and then the rear electric slide rail 42 is controlled to drive the rear plug rod 46 and the rear clamp rod 4 61 moves backward, due to the obstruction of the rear support rail 65, the insertion rod 46 and the clamping rod 461 can be directly pulled out and loosened from the support plate 12, so that the support plate 12 can be automatically removed without manual pulling. The connecting plate 64 is connected to a limit rod 2 located on one side of the support rail 65 (not marked in the figure, but technical personnel in this field can easily understand and implement this technical solution according to the context). The structure of the limit rod 2 is the same as that of the limit rod 1 63. The limit rod 2 is located at a position where the support rail 65 is away from the base 1, and the limit rod 2 is used to limit and position the leftmost position of the support plate 12 on the support rail 65.

[0044] A spraying method applied to the above-mentioned spraying equipment includes: S1) one of the two grabbing and rotating units 4 grabs a support plate 12 on which a magnet to be sprayed is placed on the upper side; S2) the grabbing and rotating unit 4 drives the support plate 12 to move below the spraying unit 2, so that the spraying unit 2 sprays the magnet on the support plate 12; S3) the grabbing and lifting unit 5 drives the other support plate 12 to move downward to clamp the magnet in the support plate 12 on the grabbing and rotating unit 4; S4) the two grabbing and rotating units 4 synchronously drive the magnets in the two support plates 12 to turn over; S5) the spraying unit 2 sprays the turned magnets again.

[0045] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. They only express the preferred implementation modes of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention.

[0046] It should be pointed out that, for ordinary technicians in this field, several modifications, increases and decreases in quantity, improvements and substitutions can be made without departing from the concept of the present invention. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

Claims

1. A spraying device for grain boundary diffusion of NdFeB magnets, comprising a base (1), a frame (11) connected to the base (1), a spraying unit (2) arranged on the frame (11), and two electric guide rails (31) installed on the base (1), wherein the slides (32) of the two electric guide rails (31) are each provided with a grabbing and rotating unit (4), characterized in that: It also includes: a grabbing and lifting unit (5) is provided on the frame (11), a support plate (12) is provided on the grabbing and lifting unit (5), one of the two grabbing and rotating units (4) is also provided with a support plate (12), one side of the support plate (12) has a raised soft enclosure (121), the enclosure (121) surrounds the support plate (12) to form a receiving groove for placing a magnet; the grabbing and rotating unit (4) includes a mounting plate (41) connected to the slide table (32) and an electric slide rail (42) mounted on the mounting plate (41), the sliding member of the electric slide rail (42) is connected to a support plate (43), a servo motor (44) is installed on one side of the support plate (43), an insertion frame (45) is connected to the output shaft of the servo motor (44), and both sides of the support plate (12) have a socket (120) for inserting the insertion frame (45); The grabbing and rotating unit (4) further comprises: the insertion rack (45) having an insertion rod (46) suitable for being inserted into the insertion hole (120) of the support plate (12), the insertion rods (46) on the two insertion racks (45) being opposite to each other; The grabbing and rotating unit (4) further comprises a clamping rod (461) sliding on the insertion frame (45), a spring (462) being connected between the clamping rod (461) and the insertion frame (45), the clamping rod (461) being close to the insertion rod (46), and one end of the clamping rod (461) close to the grabbing and lifting unit (5) being bent at a predetermined angle.

2. A spraying device for grain boundary diffusion of NdFeB magnets according to claim 1, characterized in that: The spraying unit (2) comprises two guide rails (21) connected to the frame (11), a slider (211) sliding on the guide rail (21), an electric slide rail (22) installed between the two sliders (211), and a spray gun (23) for connecting an external hose to transport spraying material installed on the sliding part of the electric slide rail (22); the slider (211) is driven by a driving component to slide along the guide rail (21), and the driving component is arranged on the frame (11).

3. A spraying device for grain boundary diffusion of NdFeB magnets according to claim 2, characterized in that: The driving assembly comprises an electric screw (25) mounted on the frame (11); one side of the slider (211) is connected to a transmission plate (24); and the electric screw (25) is threadedly connected to the transmission plate (24).

4. The spraying equipment for grain boundary diffusion of NdFeB magnets according to claim 1, characterized in that: The grabbing and lifting unit (5) comprises a second mounting plate (51) connected to the frame (11), an electric push rod (52) being mounted on the second mounting plate (51), a telescopic rod of the electric push rod (52) being connected to a lifting frame (53) sliding on the second mounting plate (51), and four electric suction cups (54) being mounted on the lower part of the lifting frame (53).

5. The spraying equipment for grain boundary diffusion of NdFeB magnets according to claim 1, characterized in that: It also includes two connecting plates (61) connected to one side of the frame (11), the connecting plate (61) being connected to a support rail (62) suitable for supporting the support plate (12), both sides of the support plate (12) protruding with a lifting portion, the lifting portion being used to be placed on the support rail (62), the connecting plate (61) being connected to a limiting rod (63) located on one side of the support rail (62), the limiting rod (63) being located at a position of the support rail (62) away from the base (1).

6. A spraying device for grain boundary diffusion of NdFeB magnets according to claim 5, characterized in that: The invention also comprises two second connecting plates (64) connected to the frame (11), the second connecting plate (64) being located on a side of the frame (11) away from the first connecting plate (61), the second connecting plate (64) being connected to a second support rail (65) suitable for supporting the support plate (12), and after the magnet spraying is completed, the second connecting plate (64) is connected to a second limiting rod located on one side of the second support rail (65), the second limiting rod being located at a position of the second support rail (65) away from the base (1).

7. A spraying method applied to the spraying equipment according to any one of claims 1 to 6, characterized in that: Included are: S1) one of the two grabbing and rotating units (4) grabs the support plate (12) on which the magnet to be sprayed is placed; S2) the grabbing and rotating unit (4) drives the supporting disk (12) to move below the spraying unit (2), so that the spraying unit (2) sprays the magnet on the supporting disk (12); S3) the grabbing and lifting unit (5) drives another supporting plate (12) to move downward to clamp the magnet in the supporting plate (12) on the grabbing and rotating unit (4); S4) the two grabbing and rotating units (4) synchronously drive the magnets in the two supporting plates (12) to turn over; S5) The spraying unit (2) sprays the turned magnet again.

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