A spraying device for electrode processing

Abstract

The present application relates to a spraying device for electrode processing, and relates to the technical field of spraying equipment, in order to solve the problem that the coating spraying on the surface of the workpiece in the prior art is not uniform enough and cannot provide good protection for the workpiece. It includes a spraying gun, an air inlet channel is arranged inside the spraying gun, a cathode guide column is arranged inside the air inlet channel, an anode plate is arranged on the inner wall of the muzzle of the spraying gun, an air outlet is provided on the anode plate, an anode guide cover is arranged on the surface of the air outlet, the cathode guide column is inserted into the anode guide cover, and the gap between the cathode guide column and the anode guide cover is for plasma gas to pass through, and a feeding pipe is arranged on the outer wall of the muzzle of the spraying gun, and a powder feeding nozzle is arranged on the inner wall of the feeding pipe. The present application makes rare earth into powder, and further atomizes the powder through a high-temperature plasma gas flow, so that the surface of the workpiece can be more comprehensively covered with a precision coating, so as to improve the protective effect of the precision coating.

Description

Technical Field

[0001] The present application relates to the technical field of spraying equipment, and in particular to a spraying equipment for electrode processing. Background Art

[0002] With the advancement and development of science and technology, the application of electrical appliances and electronic products is gradually increasing. In modern smart appliances, chips and liquid crystals are indispensable components.

[0003] In the related technology, a chip and liquid crystal manufacturing process is designed, including the production of components such as electrodes. The electrodes need to be placed in a reaction pot and processed by plasma gas. When the plasma energy reaches several hundred watts or even tens of thousands of watts, the impact of the plasma on the electrodes will intensify, causing damage to the electrode parts. When the electrodes are damaged, the corresponding chips or liquid crystals cannot be made. Therefore, a precision coating is often sprayed on the electrode surface before the electrodes are processed to protect the core parts of the chip or liquid crystal.

[0004] The main processes of precision coating are: warehouse inspection, chemical film removal, chemical cleaning, nitrogen baking, intermediate inspection, spraying, post-stage repair, intermediate inspection, ultrasonic vibration, pure water overflow, nitrogen baking, final inspection and packaging. Among them, spraying is to melt the raw materials of precision coating to a semi-molten state through a certain heat source, and atomize it through high-speed airflow, and spray and deposit it onto the surface of the workpiece. It is an important process flow for the production of precision coating.

[0005] With respect to the above-mentioned related technologies, the inventors found that the traditional spraying process will heat the spraying material to a semi-molten state. At this time, the fineness of the coating is poor, resulting in the coating deposited on the surface of the workpiece being mostly large particles of coating blocks, which are not fine enough and difficult to provide good protection for the workpiece. As the process continues to improve, special rare earth powder coatings have become good materials for precision coating spraying on workpieces, so the existing technology needs to be improved. Summary of the invention

[0006] In order to spray a more refined precision coating on the surface of a workpiece and provide better protection for the workpiece, the present application provides a spraying device for electrode processing.

[0007] The present application provides a spraying device for electrode processing using the following technical solution:

[0008] A spraying device for electrode processing comprises a spraying gun, wherein an air inlet passage for plasma gas is arranged inside the spraying gun, a cathode guide column is arranged inside the air inlet passage, an anode plate is arranged on the inner wall at the muzzle of the spraying gun, an air outlet for plasma gas to pass through is opened through the anode plate in the thickness direction, an anode guide cover is arranged on the surface of the air outlet close to the cathode guide column, the anode guide cover is arranged along the circumferential direction of the air outlet, the cathode guide column is inserted into the anode guide cover, and the gap between the cathode guide column and the anode guide cover is for plasma gas to pass through, and a feeding pipe is sleeved on the outer wall of the muzzle of the spraying gun, and a powder feeding nozzle for rare earth powder to pass through is opened on the inner wall of the feeding pipe.

[0009] By adopting the above technical scheme, plasma gas is introduced into the air inlet channel of the spray gun, and the plasma gas passes through the cathode guide column and the anode guide cover in sequence, so that the plasma gas can be ionized and carry high temperature. When the plasma gas passes through the gas outlet, the adsorbed powder entering the inside of the feeding tube from the powder feeding port will be atomized into a solution, and finally sprayed on the surface of the workpiece for manufacturing semiconductors and liquid crystal panels with the help of the circulation of plasma gas, so as to form a precision coating; the powder selected in this method is 30nm-60nm rare earth powder, which has small and fine particles and can form a larger coverage on the surface of the workpiece, thereby effectively improving the protection effect on the workpiece.

[0010] Preferably, a water-cooling pipe is provided in the air intake passage, the cathode guide column is inserted into the water-cooling pipe, the anode guide cover is inserted into the water-cooling pipe and abuts against the inner wall of the water-cooling pipe, and a gap between the outer wall of the water-cooling pipe and the inner wall of the air intake passage is used for cooling water to pass through, a first insulating ring is provided on the outer wall of the water-cooling pipe, and the first insulating ring is provided along the circumferential direction of the outer wall of the water-cooling pipe, and a second insulating ring is provided on the inner wall of the air intake passage corresponding to the first insulating ring.

[0011] By adopting the above-mentioned technical solution, a water-cooling pipe is provided to cool down the high-temperature plasma airflow circulating inside the spray gun to prevent the airflow temperature from being too high, which causes the internal parts of the spray gun to be damaged by high temperature and poses a safety hazard. At the same time, the first insulating ring and the second insulating ring are provided to effectively improve the damage caused by the electric current to the inside of the spray gun, thereby further improving the safety of the spray equipment of the present application.

[0012] Preferably, the end of the feeding pipe facing away from the spray gun is connected to a dustproof pipe, the inner wall of the dustproof pipe is provided with a flow guide cover, and the diameter of the flow guide cover gradually decreases from the end close to the feeding pipe toward the end facing away from the feeding pipe.

[0013] By adopting the above technical solution, setting up a dust-proof pipe can isolate the feeding pipe from the outside air to a certain extent, which can effectively reduce the probability of dust in the outside air mixing with rare earth powder, causing the quality of the precision coating to be affected, and can effectively improve the spraying quality of the precision coating, which has high practicality.

[0014] Preferably, the end of the air guide cover facing away from the feeding pipe is connected to a folding sleeve for increasing the spraying distance of the spray gun, and a driving component for driving the folding sleeve to fold and shrink is arranged in the dustproof tube.

[0015] By adopting the above technical solution, the provision of a folding sleeve can effectively increase the distance and range in which the spray gun can spray precision coatings, and can enable the precision coating to pass through the internal space of the folding sleeve when spraying it onto the workpiece surface, thereby reducing the time of contact with the outside air, thereby effectively ensuring the quality of the precision coating and having high practicality and convenience; at the same time, a driving component is provided to make the extension and retraction of the folding sleeve more convenient, thereby improving the automation capability.

[0016] Preferably, the driving assembly includes a slideway, a slider, a driving cylinder, a driven plate and a limit rod, the slideway is connected to the inner wall of the dustproof tube, the length direction of the slideway is consistent with the flow direction of the plasma gas, the slider is slidably connected in the slideway, the driving cylinder is connected to the inner wall of one end of the slideway close to the feeding tube, the piston rod of the driving cylinder is connected to the slider and pushes the slider to slide in the slideway, the driven plate is connected to the bottom wall of the slider, one end of the limit rod is connected to the outer wall of the folding sleeve, and the other end of the limit rod is connected to the side wall of the driven plate.

[0017] By adopting the above technical solution, the driving cylinder is started, driving the slider to slide along the length direction of the slide. During the sliding process, the driven plate follows the movement of the slider, thereby driving the limit rod to move along the length direction of the slide. During the movement, the other end of the limit rod is connected to the folding sleeve, thereby driving the folding sleeve to contract or expand along the length direction of the slide, thereby changing the unfolded length of the folding sleeve, and extending the spraying range of the precision coating. The system has a high degree of automation and is highly practical and convenient.

[0018] Preferably, the drive assembly is provided with two groups, and the two groups of drive assemblies are symmetrically arranged about the folding sleeve. The end of the driven plate facing away from the slider is hingedly connected to a guide plate, and the guide plate is used to expand the spraying range of the coating after rotation. The opening of the folding sleeve is located between the guide plates on both sides. Two groups of rotating assemblies for driving the guide plates to rotate are provided on the dustproof tube, and the guide plates and the rotating assemblies correspond one to one.

[0019] By adopting the above-mentioned technical solution, a rotating component is set up that can change the angle between the two guide plates, thereby being able to adjust the spraying angle of the precision coating. As a result, the spraying device of the present application can spray precision coatings on a larger range of workpieces, thereby improving the spraying range and work efficiency, and has high practicality and convenience.

[0020] Preferably, the rotating assembly includes a driving rack, a driven gear, a first connecting rod and a second connecting rod. A driving groove is provided through the outer wall of the dustproof tube in the thickness direction. The length direction of the driving groove is consistent with the length direction of the dustproof tube. The driving groove is connected to the slideway. The driving rack is connected to the top wall of the slider. The driven gear is rotatably connected to the inner wall of the driving groove. The driven gear is located on the side of the slideway away from the feeding tube. One end of the first connecting rod is hinged to the end of the guide plate away from the driven plate. The second connecting rod is hingedly connected to the end of the first connecting rod away from the guide plate. The end of the second connecting rod away from the first connecting rod is hingedly connected to the end wall of the driven gear.

[0021] By adopting the above technical solution, when the driving cylinder pushes the slider to slide in the slideway, the driving rack will slide along the length direction of the driving groove and mesh with the driven gear to drive the driven gear to rotate. During this process, the driven gear will drive the second connecting rod to rotate at a certain angle, so that the second connecting rod can then drive the first connecting rod and the guide plate to rotate. When the two guide plates rotate at a certain angle in directions away from each other, a guide surface can be formed for the plasma gas to flow, thereby expanding the spraying range of the plasma gas and rare earth powder, and having high practicality.

[0022] Preferably, a plurality of elastic members are arranged between the guide plates on both sides, and the elastic members are used to drive the guide plates on both sides to reset after the driven gear is reversed.

[0023] By adopting the above technical solution, when the slider moves in the reverse direction under the action of the driving cylinder, it will drive the driven gear to rotate in the reverse direction. However, due to the existence of the first connecting rod and the second connecting rod, the guide plates on both sides may not be able to reset to the initial state. By setting a reset member, mutual pulling force is provided between the guide plates on both sides to drive the guide plates to reset better, which has high practicality.

[0024] Preferably, the deflector cover and the inner wall of the folding sleeve are both provided with a heat insulation coating.

[0025] By adopting the above technical solution, the plasma gas will have high heat under the ionization heating of the cathode guide column and the anode guide cover. The provision of a thermal insulation coating can protect the guide cover and the folding sleeve to improve work safety.

[0026] Preferably, it also includes a robotic arm, a mounting platform and an electrode moving trolley, the spray gun is connected to the end of the robotic arm, the robotic arm is connected to the top wall of the mounting platform, the electrode moving trolley is provided with a mounting structure for hanging the workpiece, and the muzzle of the spray gun is set toward the direction of the electrode moving trolley.

[0027] By adopting the above-mentioned technical solution, setting up a robotic arm can enable the staff to flexibly adjust the position of the spray gun so that the spray gun can spray large workpieces in all directions, thereby improving the applicability of the spray equipment of the present application; setting up a mounting table can improve the connection stability and safety of the robotic arm; the electrode moving trolley can be used to hang products, and make the movement and operation of the products safer.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] After chemical and physical treatment, the rare earth is made into 30nm-60nm powder, making the rare earth finer, and by heating the plasma gas flow, the powder is turned into a solution through the plasma system, sprayed and deposited on the surface of the workpiece, thereby providing the workpiece with a more comprehensive and fine precision coating protection. Compared with the traditional spraying method of hot melting the material, this method can improve the fineness of the precision coating and provide better protection for the workpiece;

[0030] By arranging a dustproof tube outside the feeding tube, the rare earth powder can reduce the contact with the outside air, so as to ensure the purity of the rare earth powder, so that the purity of the precision coating is also guaranteed, which helps to improve the protection effect of the precision coating;

[0031] The provision of a folding sleeve and a driving assembly can extend the spraying range of the spraying device of the present application, thereby effectively improving the applicability and work efficiency of the spraying operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a spraying device for electrode processing according to an embodiment of the present application.

[0033] Figure 2 It is a schematic diagram of the structure of the spray gun according to an embodiment of the present application.

[0034] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0035] Explanation of the reference numerals in the accompanying drawings: 1. spray gun; 11. air inlet channel; 12. cathode guide column; 13. anode plate; 131. air outlet; 14. anode guide cover; 15. water cooling pipe; 16. first insulating ring; 17. second insulating ring; 2. feeding pipe; 21. powder feeding nozzle; 3. dustproof pipe; 31. air guide cover; 32. driving groove; 4. folding sleeve; 5. driving assembly; 51. slideway; 52. slider; 53. driving cylinder; 54. driven plate; 541. guide plate; 55. limiting rod; 6. rotating assembly; 61. driving rack; 62. driven gear; 63. first connecting rod; 64. second connecting rod; 65. elastic member; 7. mechanical arm; 71. mounting table; 8. electrode moving trolley; 81. mounting structure. Implementation

[0036] The following is combined with Figure 1-3 This application is described in further detail. Example

[0037] Embodiment 1 of the present application discloses a spraying device for electrode processing. Figure 1 , a spraying equipment for electrode processing, comprising a mounting platform 71, a mechanical arm 7, an electrode moving trolley 8 and a spray gun 1, the mounting platform 71 is connected to the ground by anchor bolts, the mechanical arm 7 is connected to the top wall of the mounting platform 71 by bolts, the electrode moving trolley 8 is arranged opposite to the mechanical arm 7, and the electrode moving trolley 8 is provided with a mounting structure 81 for fixing the workpiece to be sprayed. In this embodiment, the mounting structure 81 is a support frame, which can support the workpiece; the spray gun 1 is connected to the end of the mechanical arm 7 by bolts, and the muzzle of the spray gun 1 is arranged toward the direction of the workpiece. By setting the mounting platform 71, the stability of the spraying work can be effectively improved, and the mechanical arm 7 can effectively improve the spraying range of the spray gun 1 of this application for precision coating, so as to improve the spraying efficiency and work efficiency, and the electrode moving trolley 8 can drive the workpiece product to move and install, thereby improving the safety and convenience during the spraying operation.

[0038] Reference Figure 2An air inlet channel 11 is provided inside the spray gun 1 along the length direction, and the air inlet channel 11 is connected to an external plasma device for passing plasma gas. A cathode guide column 12 is provided inside the air inlet channel 11, and an anode plate 13 is provided on the inner wall of the muzzle of the spray gun 1. The anode plate 13 is penetrated and provided with an air outlet 131 along the thickness direction. An anode guide cover 14 is integrally formed on the side of the anode plate 13 facing the cathode guide column 12. The anode guide cover 14 is provided along the circumferential direction of the air outlet 131, and the cathode guide column 12 is inserted into the anode guide cover 14. The plasma gas will be able to pass through the gap between the cathode guide column 12 and the anode guide cover 14, and finally leave the spray gun 1 through the air outlet 131. In this embodiment, the anode and the cathode are energized by a power supply, so that the airflow passing through the cathode guide column 12 and the anode guide cover 14 is ionized to form a high-temperature and high-speed airflow. The diameter of the anode guide cover 14 gradually decreases from the end close to the cathode guide column 12 to the end away from the cathode guide column 12, so that the plasma gas can pass through the outlet 131 at a higher flow rate, forming a high-speed airflow, so as to better spray the workpiece.

[0039] Reference Figure 2 A water cooling pipe 15 is arranged inside the air inlet passage 11, and the water cooling pipe 15 is sleeved on the outside of the cathode guide column 12. The end of the anode guide cover 14 away from the air outlet 131 is inserted into the inner wall of the water cooling pipe 15 and abuts against the inner wall of the water cooling pipe 15. The cooling water flowing in the water cooling pipe 15 will cool down the high-temperature airflow inside the air inlet passage 11 to prevent the gas from overheating and causing damage to the spray gun 1, which can effectively improve the safety of the spray gun 1 when in use.

[0040] Reference Figure 2 A first insulating ring 16 is provided on the outer wall of one end of the water-cooling tube 15 close to the anode guide cover 14. Correspondingly, a second insulating ring 17 is provided on the inner wall of the air intake channel 11 at a position corresponding to the first insulating ring 16. Both the first insulating ring 16 and the second insulating ring 17 are made of rubber material, thereby being able to play an effective insulating role and improving the safety of the spraying equipment of the present application.

[0041] Reference Figure 2 The outer wall of the muzzle of the spray gun 1 is connected to a feeding pipe 2 by welding. A plurality of powder delivery nozzles 21 are provided on the inner wall of the feeding pipe 2 in a circumferential direction. The plurality of powder delivery nozzles 21 add 30nm-60nm rare earth powder into the feeding pipe 2 through pipelines. When the high-temperature plasma airflow contacts the powder, the powder is converted into a solution and sprayed onto the surface of the workpiece, thereby being deposited to form a precision coating.

[0042] The implementation principle of a spraying device for electrode processing in Example 1 of the present application is as follows: an external plasma system is started, and an airflow is injected into the spray gun 1. The airflow is ionized when passing through the cathode guide column 12 and the anode guide cover 14 to form a high-temperature and high-speed plasma airflow, and is pressurized by the gradually shrinking anode guide cover 14 and is quickly ejected from the air outlet 131; rare earth powder is added into the feeding tube 2 through the powder feeding nozzle 21, and is contacted with the plasma airflow to form a solution, and is sprayed on the surface of the workpiece at a high speed to be deposited to form a precision coating, thereby making the precision coating more refined and providing better protection for the workpiece. Example

[0043] Embodiment 2 of the present application discloses a spraying device for electrode processing. Figure 2 and Figure 3 The end of the feeding tube 2 facing away from the spray gun 1 is connected to the dustproof tube 3 through welding, and the inner wall of the dustproof tube 3 is integrally formed with a guide cover 31. The diameter of the guide cover 31 gradually decreases from the end close to the feeding tube 2 toward the end facing away from the feeding tube 2, thereby isolating the external air to a certain extent, reducing the dust in the external air from affecting the purity of the rare earth powder, and causing the problem of more impurities in the precision coating, thereby effectively improving the use effect of the spraying equipment of the present application.

[0044] Reference Figure 2 and Figure 3 The end of the air guide 31 facing away from the feeding tube 2 is connected to a metal folding sleeve 4, and the folding sleeve 4 and the air guide 31 are both provided with a heat insulation coating, which can effectively avoid the problem of the folding sleeve 4 and the air guide 31 being damaged by the high-temperature plasma gas, thereby improving safety; two groups of driving components 5 for driving the folding sleeve 4 to contract or expand are arranged in the dustproof tube 3, and the two groups of driving components 5 are symmetrically arranged about the folding sleeve 4, and the driving component 5 includes a slide 51, a slider 52, a driving cylinder 53, a driven plate 54 and a limit rod 55.

[0045] Reference Figure 2 and Figure 3 The slideway 51 is connected to the inner wall of the dustproof tube 3 by welding, and the length direction of the slideway 51 is consistent with the length direction of the dustproof tube 3. The base of the driving cylinder 53 is connected to the inner wall of one end of the slideway 51 close to the feeding tube 2 by welding. The slider 52 is slidably connected in the slideway 51. The slider 52 is connected to the end wall of the piston rod of the driving cylinder 53 by welding. Under the driving action of the driving cylinder 53, the slider 52 can slide along the length direction of the slideway 51;

[0046] Reference Figure 2 and Figure 3The driven plate 54 is connected to the bottom wall of the slider 52 by welding, one end of the limiting rod 55 is connected to the corresponding end of the driven plate 54 close to the folding sleeve 4 by welding, and the other end of the limiting rod 55 is connected to the outer wall of the folding sleeve 4 away from the feeding tube 2 by welding. When the driven plate 54 moves with the slider 52, it can drive the limiting rod 55 to move, thereby pulling the folding sleeve 4 to extend, so that the airflow can pass through the extension of the folding sleeve 4, so that the solution can further reduce the contact with the air during the spraying process, and maintain the purity of the precision coating.

[0047] Reference Figure 2 and Figure 3 Each driven plate 54 is hingedly connected to a guide plate 541 at one end away from the slider 52, and the two guide plates 541 are parallel to each other. Two groups of rotating components 6 are arranged in the dustproof tube 3 for driving the guide plates 541 to rotate during the movement of the slider 52 to expand the angle and range of precision coating spraying, and each rotating component 6 corresponds to a guide plate 541.

[0048] Reference Figure 2 and Figure 3 The rotating assembly 6 includes a driving rack 61, a driven gear 62, a first connecting rod 63 and a second connecting rod 64; a driving groove 32 is opened on the outer wall of the dustproof tube 3 along the length direction, and the driving groove 32 penetrates the side wall of the dustproof tube 3. The driving rack 61 is connected to the outer wall of the slider 52 facing the driving groove 32 by welding, and the driven gear 62 is rotatably connected to the inner wall of the driving groove 32. The driven gear 62 is located on the side of the slider 52 away from the feeding tube 2. When the slider 52 moves, the driving rack 61 is meshed with the driven gear 62, thereby driving the driven gear 62 to rotate;

[0049] Reference Figure 2 and Figure 3 One end of the first connecting rod 63 is connected to the end of the guide plate 541 away from the driven plate 54, the second connecting rod 64 is hingedly connected to the end of the first connecting rod 63 away from the guide plate 541, and the other end of the second connecting rod 64 is hingedly connected to the outer wall of one side of the driven gear 62 at a non-center position, so that when the driven gear 62 rotates, the guide plate 541 can be driven to rotate through the transmission between the first connecting rod 63 and the second connecting rod 64, so that the spraying angle of the precision coating can be expanded, thereby improving the spraying range and work efficiency.

[0050] Reference Figure 2 and Figure 3, a plurality of elastic members 65 for resetting the guide plates 541 after rotation are arranged between the guide plates 541 on both sides; in the present embodiment, the elastic member 65 is a plug rod, a plug tube and a spring, one end of the plug rod is rotatably connected to the bottom wall of the guide plate 541 on one side through a universal ball, and one end of the plug tube is hingedly connected to the top wall of the guide plate 541 on the other side through a universal ball, one end of the plug rod is inserted into the plug tube, the spring is sleeved on the peripheral wall of the plug rod inserted into the plug tube, and one end is connected to the bottom wall of the plug tube by gluing, so that when the guide plates 541 on both sides rotate in directions away from each other, the plug rod can be partially disengaged from the plug tube, the spring is stretched, and elastic potential energy is accumulated. When the driving assembly 5 works in the reverse direction, the elasticity will drive the elastic member 65 to drive the guide plate 541 to reset. The structure is simple and easy to implement.

[0051] The implementation principle of a spraying device for electrode processing in Example 2 of the present application is as follows: a dustproof tube 3 and a guide cover 31 are provided to isolate the feeding tube 2 from the outside, thereby improving the problem that dust in the external air affects the purity of rare earth powder and precision coating, and improving the protective effect of the precision coating on the workpiece surface; at the same time, a folding sleeve 4 is provided to effectively extend the protection length of the precision coating solution, so that the precision coating can further reduce the contact time with the external air, thereby achieving efficient spraying of the workpiece to improve the quality of the precision coating; when the precision coating solution passes through the folding sleeve 4, it will be divergently sprayed along the inclined direction of the guide plate 541 to improve the work efficiency of spraying the workpiece surface.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A spraying device for electrode processing, characterized in that: The invention comprises a spray gun (1), wherein an air inlet channel (11) is arranged inside the spray gun (1) for plasma gas to pass through, wherein a cathode guide column (12) is arranged inside the air inlet channel (11), wherein an anode plate (13) is arranged on the inner wall at the muzzle of the spray gun (1), wherein the anode plate (13) is provided with an air outlet (131) through-through in the thickness direction for plasma gas to pass through, wherein an anode guide cover (14) is arranged on the surface of the air outlet (131) close to the cathode guide column (12), wherein the anode guide cover (14) is arranged along the circumferential direction of the air outlet (131), wherein the cathode guide column (12) is inserted into the anode guide cover (14), and wherein the cathode guide column (12) and the anode guide cover are in contact with each other. The gap between the two ends of the spray gun (14) is used for plasma gas to pass through. The outer wall of the muzzle of the spray gun (1) is sleeved with a feeding pipe (2). The inner wall of the feeding pipe (2) is provided with a powder feeding nozzle (21) for rare earth powder to pass through. The end of the feeding pipe (2) away from the spray gun (1) is connected to a dustproof pipe (3). The inner wall of the dustproof pipe (3) is provided with a guide cover (31). The diameter of the guide cover (31) gradually decreases from the end close to the feeding pipe (2) toward the end away from the feeding pipe (2). The end of the guide cover (31) away from the feeding pipe (2) is connected to a folding sleeve (4) for increasing the spraying distance of the spray gun (1). The dustproof pipe (3) is provided with a device for driving the folding sleeve (4) to move forward. A driving assembly (5) for folding and contracting, the driving assembly (5) comprising a slideway (51), a slider (52), a driving cylinder (53), a driven plate (54) and a limiting rod (55); the slideway (51) is connected to the inner wall of the dustproof pipe (3); the length direction of the slideway (51) is consistent with the flow direction of the plasma gas; the slider (52) is slidably connected in the slideway (51); the driving cylinder (53) is connected to the inner wall of one end of the slideway (51) close to the feeding pipe (2); the piston rod of the driving cylinder (53) is connected to the slider (52) and pushes the slider (52) to slide in the slideway (51); the driven plate (54) is connected to the bottom wall of the slider (52); the limiting rod (55) is connected to the bottom wall of the slider (52); One end of the rod (55) is connected to the outer wall of the folding sleeve (4), and the other end of the limit rod (55) is connected to the side wall of the driven plate (54). The driving assembly (5) is provided with two groups, and the two groups of driving assemblies (5) are symmetrically arranged with respect to the folding sleeve (4). One end of the driven plate (54) away from the slider (52) is hingedly connected to a guide plate (541), and the guide plate (541) is used to expand the spray range of the coating after rotation. The opening of the folding sleeve (4) is located between the guide plates (541) on both sides. Two groups of rotating assemblies (6) for driving the guide plates (541) to rotate are provided on the dustproof tube (3), and the guide plates (541) and the rotating assemblies (6) correspond to each other one by one.

2. The electrode processing spraying equipment according to claim 1, characterized in that: A water cooling pipe (15) is arranged in the air intake passage (11), the cathode guide column (12) is inserted into the water cooling pipe (15), the anode guide cover (14) is inserted into the water cooling pipe (15) and abuts against the inner wall of the water cooling pipe (15), a gap between the outer wall of the water cooling pipe (15) and the inner wall of the air intake passage (11) is provided for cooling water to pass through, the outer wall of the water cooling pipe (15) is provided with a first insulating ring (16), the first insulating ring (16) is arranged along the circumferential direction of the outer wall of the water cooling pipe (15), and the inner wall of the air intake passage (11) is provided with a second insulating ring (17) corresponding to the first insulating ring (16).

3. The electrode processing spraying equipment according to claim 1, characterized in that: The rotating assembly (6) comprises a driving rack (61), a driven gear (62), a first connecting rod (63) and a second connecting rod (64); a driving groove (32) is formed through the outer wall of the dustproof tube (3) along the thickness direction; the length direction of the driving groove (32) is consistent with the length direction of the dustproof tube (3); the driving groove (32) is connected to the slideway (51); the driving rack (61) is connected to the top wall of the slider (52); the driven gear (62) is rotating The driven gear (62) is located on the side of the slideway (51) away from the feeding tube (2), one end of the first connecting rod (63) is hinged to the end of the guide plate (541) away from the driven plate (54), the second connecting rod (64) is hinged to the end of the first connecting rod (63) away from the guide plate (541), and the end of the second connecting rod (64) away from the first connecting rod (63) is hinged to the end wall of the driven gear (62).

4. The electrode processing spraying equipment according to claim 3, characterized in that: A plurality of elastic members (65) are arranged between the guide plates (541) on both sides, and the elastic members (65) are used to drive the guide plates (541) on both sides to reset after the driven gear (62) reverses.

5. The electrode processing spraying equipment according to claim 1, characterized in that: The inner walls of the air guide cover (31) and the folded sleeve (4) are both provided with a heat insulation coating.

6. The electrode processing spraying equipment according to claim 1, characterized in that: It also includes a mechanical arm (7), a mounting platform (71) and an electrode movable trolley (8), wherein the spray gun (1) is connected to the end of the mechanical arm (7), the mechanical arm (7) is connected to the top wall of the mounting platform (71), and the electrode movable trolley (8) is provided with a mounting structure (81) for hanging a workpiece, and the muzzle of the spray gun (1) is arranged toward the electrode movable trolley (8).

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