Plasma spraying equipment and spraying process

Abstract

The invention discloses plasma spraying equipment and a spraying technology.The plasma spraying equipment comprises a supporting table, and a supporting top box is fixedly connected to the top of the supporting table. The plasma spraying equipment and the spraying technology.The plasma spraying equipment has the beneficial effects that by arranging a ventilation ring, an inner ventilation head and a ventilation net barrel, hydrogen in a hydrogen inlet pipe enters the ventilation ring through an outer thread mounting pipe and a first inlet pipe; according to the plasma spraying device, powder is sprayed out through the inner ventilation heads, is evenly mixed with argon in the spraying box, is evenly mixed through the ventilation net barrel and then is discharged through the spraying pipe, and plasma spraying treatment is conducted in combination with the powder of the feeding pipe; and by arranging a rack, a first gear and a rotating rod, when the output end of the air cylinder drives the rack to move, the powder is sprayed out through the spraying box. The rack drives the engaged first gear to rotate, the first gear drives the supporting disc to rotate and adjust through a rotating rod on the inner side, position exchange between the two four-jaw chucks is completed, and feeding and discharging position adjustment treatment is conducted on the metal base clamped by the four-jaw chucks.

Description

Technical Field

[0001] The present invention relates to the technical field of plasma spraying, and specifically provides a plasma spraying device and a spraying process. Background Art

[0002] A plasma spraying device is a device that uses plasma technology for surface treatment. Plasma spraying devices are mainly used for surface strengthening and modification of materials. By forming a firm surface layer, the substrate surface can have various properties such as wear resistance, corrosion resistance, high-temperature oxidation resistance, electrical insulation, heat insulation, and radiation protection. This technology has a wide range of applications in many fields such as aerospace, automotive, electronics, construction, metallurgy, and medical. The working principle of plasma spraying devices is mainly based on the generation and application of plasma. Specifically, it uses high-frequency electric field discharge to ionize gas molecules into plasma. These plasmas are accelerated under the action of the high-frequency electric field to form high-energy electron beams and ion beams. When these charged particles impact the surface of the object to be treated, chemical reactions and physical effects will occur, thereby forming a uniform, dense, and strongly adherent thin film or coating on the surface of the object. Plasma spraying devices mainly consist of three parts: a plasma generator, a gas delivery pipeline, and a plasma spray head. Among them, the plasma generator is the key component for generating high-voltage energy. It can activate and control gas molecules inside the steel pipe of the nozzle to ionize them into plasma. The gas delivery pipeline is responsible for delivering gas to the plasma spray head, and the plasma spray head is the component that sprays plasma onto the surface of the object to be treated; In traditional plasma spraying devices, there is a shortage of gas supply. Most of the gas flows in a beam shape, not in a divergent manner, and does not flow evenly from all directions. The gas mixing uniformity is not high enough, which affects the purity and quality of the coating. Summary of the Invention

[0003] The purpose of the present invention is to provide a plasma spraying device and a spraying process to solve the problems in the above-mentioned background art that in traditional plasma spraying devices, there is a shortage of gas supply, most of the gas flows in a beam shape, not in a divergent manner, and does not flow evenly from all directions, and the gas mixing uniformity is not high enough, which affects the purity and quality of the coating.

[0004] To achieve the above object, the present invention provides the following technical solution: A plasma spraying device, including a support table, a support top box is fixedly connected to the top of the support table, a support disk is rotatably provided on the top of the support top box, four-jaw chucks are symmetrically and rotatably connected to the top of the support disk, a support frame is slidably connected to the top of the support table, an adjusting screw rod is rotatably connected inside the support frame, a lifting inner support plate is threadedly connected to the outside of the adjusting screw rod, the lifting inner support plate is slidably connected to the support frame, a support top platform is fixedly connected to the top of the lifting inner support plate, a fixed bottom box is fixedly connected to the bottom of the support top platform, the fixed bottom box is slidably connected to the support frame, a second linear module is installed inside the fixed bottom box, a side moving frame is installed on the moving slide of the second linear module, the side moving frame is slidably connected to the support frame, a spraying box is rotatably connected to the inner side of the side moving frame, a second motor is installed on one side of the side moving frame, the output end of the second motor is fixedly connected to the spraying box, a second inlet pipe is fixedly connected to one side of the spraying box, a first inlet pipe is fixedly connected to the inside of the spraying box, a ventilation ring is fixedly connected to the inner side of the spraying box, one end of the first inlet pipe is fixedly connected to the ventilation ring, a plurality of inner ventilation nozzles are fixedly connected to the inner side of the ventilation ring at equal intervals, a spraying pipe is fixedly connected to the inside of the spraying box, a ventilation mesh barrel is fixedly connected to one side of the spraying pipe, a feeding pipe is fixedly connected to the inside of the spraying box, and the feeding pipe is fixedly connected to the spraying pipe.

[0005] Preferably, inner threaded sleeves are fixedly connected to one ends of the first inlet pipe and the second inlet pipe, an externally threaded installation pipe is threadedly installed inside the inner threaded sleeve, a filter mesh is fixedly connected to the inside of the externally threaded installation pipe, a hydrogen inlet pipe is fixedly connected to one end of one of the externally threaded installation pipes, and an argon inlet pipe is fixedly connected to one end of the other externally threaded installation pipe.

[0006] Preferably, an outer sealing cover matched with the inner threaded sleeve is fixedly connected to the outside of the externally threaded installation pipe, and a plurality of outer fixing blocks are fixedly connected to the outside of the externally threaded installation pipe at equal intervals.

[0007] Preferably, a rotating rod is rotatably connected inside the support top box, the top end of the rotating rod is fixedly connected to the support disk, a first gear is fixedly connected to the outside of the rotating rod, a rack is slidably connected inside the support top box, the rack is meshed with the first gear, a cylinder is installed inside the support top box, and the output end of the cylinder is fixedly connected to the rack.

[0008] Preferably, rotating columns are symmetrically and rotatably connected inside the support disk. A second gear is fixedly connected to the outer side of the rotating column. Third gears are symmetrically and rotatably connected inside the support disk. The third gears are meshed with the second gears. Third motors are symmetrically installed inside the support disk. The output ends of the third motors are fixedly connected to the third gears.

[0009] Preferably, a first linear module is installed inside the support platform. The moving slide of the first linear module is connected to the support frame.

[0010] Preferably, limiting blocks are symmetrically and fixedly connected to the bottom of the support frame. The limiting blocks are slidably connected to the support platform. A limiting rod is slidably connected inside the limiting block. The limiting rod is fixedly connected to the support platform.

[0011] Preferably, a first motor is arranged inside the support frame. The output end of the first motor is fixedly connected to the adjusting screw rod.

[0012] Preferably, limiting slide rods are symmetrically and fixedly connected to the bottom of the support top platform. The limiting slide rods are slidably connected to the support frame.

[0013] A plasma spraying process includes the following steps:

[0014] S1. Pretreat the surface of the metal substrate, perform sandblasting, rinsing and drying treatments on the surface of the metal substrate;

[0015] S2. Select ceramic powder and cermet powder according to the material, usage environment and performance requirements of the metal substrate;

[0016] S3. Check the state of the plasma spraying equipment, and adjust the spraying distance, spraying speed and plasma gas flow rate;

[0017] S4. Preheat the metal substrate before spraying;

[0018] S5. Start the plasma spraying equipment, feed the spraying powder into the plasma jet, and the powder melts at high temperature and is sprayed onto the surface of the metal substrate to form a uniform coating;

[0019] S6. According to the application requirements and performance requirements of the metal substrate, perform multi-layer spraying, and use spraying powders with different compositions and performances for each layer;

[0020] S7. Adopt a gradient coating design so that the coating gradually changes from the metal substrate to the surface to improve the overall performance and adaptability of the coating;

[0021] S8. Introduce a recovery system for the spraying powder to recycle the unused powder;

[0022] S9. After spraying is completed, the metal substrate and the coating are cooled by forced cooling;

[0023] S10. Conduct appearance inspection, thickness measurement, and hardness test on the coating;

[0024] S11. Conduct performance tests on the metal substrate treated by plasma spraying for corrosion resistance, wear resistance, and high-temperature resistance.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing an air vent ring, an inner air vent head, and an air vent mesh barrel, it is realized that the hydrogen in the hydrogen inlet pipe enters the air vent ring through the external thread mounting pipe and the first inlet pipe, is ejected through each inner air vent head, is uniformly mixed with the argon in the spraying box, is discharged after being mixed evenly through the air vent mesh barrel, and is discharged through the spraying pipe. Combined with the powder in the feeding pipe, plasma spraying treatment is carried out. By providing a rack, a first gear, and a rotating rod, it is realized that when the output end of the cylinder drives the rack to move, the rack drives the engaged first gear to rotate, and the first gear drives the support disk to rotate and adjust through the rotating rod inside, completing the position interchange between the two four-jaw chucks and adjusting the loading and unloading positions of the metal substrate clamped by the four-jaw chucks. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained by extending the provided drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a top view of the present invention;

[0030] Figure 3 It is a schematic diagram of the internal structure of the support frame of the present invention;

[0031] Figure 4 It is a bottom view of the internal structure of the support top box of the present invention;

[0032] Figure 5 It is a bottom view of the four-jaw chuck of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the side moving frame of the present invention;

[0034] Figure 7 Schematic diagram of the internal structure of the spraying box of the present invention;

[0035] Figure 8 Bottom-up view of the external thread installation pipe of the present invention.

[0036] In the figure: 1, support platform; 2, support top box; 3, support disc; 4, four-jaw chuck; 5, support frame; 6, adjusting screw rod; 7, lifting inner support plate; 8, support top platform; 9, limit slide bar; 10, first motor; 11, first linear module; 12, limit block; 13, limit rod; 14, fixed bottom box; 15, second linear module; 16, side moving frame; 17, spraying box; 18, second motor; 19, feeding pipe; 20, first inlet pipe; 21, internal thread sleeve; 22, hydrogen inlet pipe; 23, argon inlet pipe; 24, second inlet pipe; 25, external thread installation pipe; 26, external fixing block; 27, external seal cover; 28, ventilation ring; 29, internal ventilation head; 30, ventilation net barrel; 31, spraying pipe; 32, rotating rod; 33, first gear; 34, rack; 35, cylinder; 36, rotating column; 37, second gear; 38, third gear; 39, third motor; 40, impurity filtering net. Detailed implementation manners

[0037] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are only examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] See Figures 1 to 8As shown in the figure, a plasma spraying device according to an embodiment of the present invention includes a support table 1. A support top box 2 is fixedly connected to the top of the support table 1. A support disk 3 is rotatably provided on the top of the support top box 2. Four-jaw chucks 4 are symmetrically and rotatably connected to the top of the support disk 3. A support frame 5 is slidably connected to the top of the support table 1. An adjustment screw rod 6 is rotatably connected inside the support frame 5. A lifting inner support plate 7 is threadedly connected to the outside of the adjustment screw rod 6. The lifting inner support plate 7 is slidably connected to the support frame 5. A support top platform 8 is fixedly connected to the top of the lifting inner support plate 7. A fixed bottom box 14 is fixedly connected to the bottom of the support top platform 8. The fixed bottom box 14 is slidably connected to the support frame 5. A second linear module 15 is installed inside the fixed bottom box 14. A side moving frame 16 is installed on the moving slide of the second linear module 15. The side moving frame 16 is slidably connected to the support frame 5. A spraying box 17 is rotatably connected to the inner side of the side moving frame 16. A second motor 18 is installed on one side of the side moving frame 16. The output end of the second motor 18 is fixedly connected to the spraying box 17. A second inlet pipe 24 is fixedly connected to one side of the spraying box 17. A first inlet pipe 20 is fixedly connected inside the spraying box 17. An air vent ring 28 is fixedly connected to the inner side of the spraying box 17. One end of the first inlet pipe 20 is fixedly connected to the air vent ring 28. A plurality of inner air vent heads 29 are fixedly connected to the inner side of the air vent ring 28 at equal intervals. A spraying pipe 31 is fixedly connected inside the spraying box 17. An air vent net barrel 30 is fixedly connected to one side of the spraying pipe 31. A feeding pipe 19 is fixedly connected inside the spraying box 17. The feeding pipe 19 is fixedly connected to the spraying pipe 31;

[0040] The hydrogen in the hydrogen inlet pipe 22 enters the air vent ring 28 through the external thread installation pipe 25 and the first inlet pipe 20, is ejected through each inner air vent head 29, is uniformly mixed with the argon in the spraying box 17, is mixed evenly through the air vent net barrel 30 and then discharged, and is discharged through the spraying pipe 31.

[0041] Wherein, one end of each of the first inlet pipe 20 and the second inlet pipe 24 is fixedly connected with an inner thread sleeve 21. An external thread installation pipe 25 is threadedly installed inside the inner thread sleeve 21. A filter impurity net 40 is fixedly connected to the inside of the external thread installation pipe 25. One end of one of the external thread installation pipes 25 is fixedly connected with a hydrogen inlet pipe 22. One end of the other external thread installation pipe 25 is fixedly connected with an argon inlet pipe 23; the gas entering from the hydrogen inlet pipe 22 and the argon inlet pipe 23 is filtered through the filter impurity net 40.

[0042] Wherein, an external sealing cover 27 matched with the inner thread sleeve 21 is fixedly connected to the outside of the external thread installation pipe 25. A plurality of external fixing blocks 26 are fixedly connected to the outside of the external thread installation pipe 25 at equal intervals; the external sealing cover 27 seals the installation between the first inlet pipe 20 and the external sealing cover 27.

[0043] Among them, a rotating rod 32 is rotatably connected inside the supporting top box 2. The top end of the rotating rod 32 is fixedly connected to the supporting disk 3. A first gear 33 is fixedly connected to the outer side of the rotating rod 32. A rack 34 is slidably connected inside the supporting top box 2. The rack 34 is meshed with the first gear 33. A cylinder 35 is installed inside the supporting top box 2. The output end of the cylinder 35 is fixedly connected to the rack 34. The output end of the cylinder 35 drives the rack 34 to move. When the rack 34 moves, it drives the meshed first gear 33 to rotate. When the first gear 33 rotates, it drives the inner rotating rod 32 to rotate. When the rotating rod 32 rotates, it drives the supporting disk 3 and the four-jaw chuck 4 to rotate as a whole, adjusting the position of the four-jaw chuck 4 and completing the loading and unloading process.

[0044] Among them, rotating columns 36 are symmetrically and rotatably connected inside the supporting disk 3. A second gear 37 is fixedly connected to the outer side of the rotating column 36. Third gears 38 are symmetrically and rotatably connected inside the supporting disk 3. The third gears 38 are meshed with the second gears 37. Third motors 39 are symmetrically installed inside the supporting disk 3. The output ends of the third motors 39 are fixedly connected to the third gears 38. The output ends of the third motors 39 drive the third gears 38 to rotate. The third gears 38 drive the meshed second gears 37 to rotate. The second gears 37 drive the inner rotating columns 36 to rotate. The rotating columns 36 drive the four-jaw chuck 4 to perform rotation adjustment processing.

[0045] Among them, a first linear module 11 is installed inside the supporting table 1. The moving slide of the first linear module 11 is connected to the support frame 5. The moving slide of the first linear module 11 drives the support frame 5 to move.

[0046] Among them, limiting blocks 12 are symmetrically and fixedly connected to the bottom of the support frame 5. The limiting blocks 12 are slidably connected to the supporting table 1. A limiting rod 13 is slidably connected inside the limiting blocks 12. The limiting rod 13 is fixedly connected to the supporting table 1. The support frame 5 drives the limiting blocks 12 to slide in a limited manner on the outer side of the limiting rod 13, improving the adjustment stability of the support frame 5.

[0047] Among them, a first motor 10 is arranged inside the support frame 5. The output end of the first motor 10 is fixedly connected to the adjusting lead screw 6. The output end of the first motor 10 drives the adjusting lead screw 6 to rotate. The adjusting lead screw 6 drives the outer lifting inner support plate 7 to adjust the height position, completing the height position adjustment of the supporting top platform 8 and the fixed bottom box 14.

[0048] Among them, limiting slide rods 9 are symmetrically and fixedly connected to the bottom of the supporting top platform 8. The limiting slide rods 9 are slidably connected to the support frame 5. The limiting slide rods 9 are slidably connected to the support frame 5 in a limited manner, improving the adjustment stability of the lifting inner support plate 7 and the supporting top platform 8.

[0049] A plasma spraying process includes the following steps:

[0050] S1. Pretreat the surface of the metal substrate by sandblasting, rinsing and drying the surface of the metal substrate;

[0051] S2. Select ceramic powder and cermet powder according to the material, usage environment and performance requirements of the metal substrate;

[0052] S3. Check the status of the plasma spraying equipment and adjust the spraying distance, spraying speed and plasma gas flow rate;

[0053] S4. Preheat the metal substrate before spraying;

[0054] S5. Start the plasma spraying equipment, feed the spraying powder into the plasma jet, and the powder melts at high temperature and is sprayed onto the surface of the metal substrate to form a uniform coating;

[0055] S6. Implement multi-layer spraying according to the application requirements and performance requirements of the metal substrate, and use spraying powders with different compositions and performances for each layer;

[0056] S7. Adopt a gradient coating design so that the coating gradually changes from the metal substrate to the surface to improve the overall performance and adaptability of the coating;

[0057] S8. Introduce a recycling system for the spraying powder to recycle and reuse the unused powder;

[0058] S9. After spraying, let the metal substrate and the coating adopt a forced cooling method;

[0059] S10. Conduct appearance inspection, thickness measurement and hardness test on the coating;

[0060] S11. Conduct performance tests on the corrosion resistance, wear resistance and high temperature resistance of the metal substrate treated by plasma spraying.

[0061] Specifically, during use, the metal substrate is clamped by the four-jaw chuck 4. The support frame 5 is driven to move and adjust by the moving slide of the first linear module 11. The output end of the first motor 10 drives the adjusting screw rod 6 to rotate. When the adjusting screw rod 6 rotates, it drives the outer lifting inner support plate 7 to move and adjust. The lifting inner support plate 7 drives the support top platform 8 and the fixed bottom box 14 to move in height, and the spraying height position of the spraying box 17 is adjusted. The moving slide of the second linear module 15 can drive the side moving frame 16 to further adjust the height position, enabling flexible adjustment of the height position. The outer threaded mounting tube 25 is threadedly mounted on the inner side of the inner threaded sleeve 21. The connection between the inner threaded sleeve 21 and the outer threaded mounting tube 25 is sealed by the outer seal cover 27. Hydrogen is input into the ventilation ring 28 through the hydrogen inlet tube 22, and argon is input into the second inlet tube 24 and the spraying box 17 through the argon inlet tube 23. The hydrogen in the ventilation ring 28 enters the spraying box 17 through the inner ventilation head 29 and is evenly mixed with the argon in the spraying box 17. Then, it enters the spraying tube 31 through the various mesh holes of the ventilation mesh barrel 30 and is sprayed out together after being evenly mixed. The spraying powder is fed through the feeding tube 19. The output end of the third motor 39 drives the third gear 38 to rotate. When the third gear 38 rotates, it drives the engaged second gear 37 to rotate. The second gear 37 drives the four-jaw chuck 4 to rotate and adjust through the inner rotating column 36. The four-jaw chuck 4 drives the metal substrate for support treatment, and uniform plasma spraying is performed on the outside. After spraying, the output end of the cylinder 35 drives the rack 34 to move. When the rack 34 moves, it drives the engaged first gear 33 to rotate. When the first gear 33 rotates, it drives the inner rotating rod 32 to rotate. When the rotating rod 32 rotates, it drives the support disk 3 and the four-jaw chuck 4 to rotate as a whole, and the position of the four-jaw chuck 4 is switched to complete the loading and unloading process.

[0062] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0063] Those skilled in the art will readily conceive of other embodiments of the present disclosure upon considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only to be considered as exemplary, and the true scope of the present disclosure is pointed out by the following claims.

Claims

1. A plasma spraying device, characterized in that, It includes a support platform (1), a support top box (2) is fixedly connected to the top of the support platform (1), a support disk (3) is rotatably arranged on the top of the support top box (2), four-jaw chucks (4) are symmetrically and rotatably connected to the top of the support disk (3), a support frame (5) is slidably connected to the top of the support platform (1), an adjusting screw rod (6) is rotatably connected inside the support frame (5), a lifting inner support plate (7) is threadedly connected to the outside of the adjusting screw rod (6), the lifting inner support plate (7) is slidably connected to the support frame (5), a support top platform (8) is fixedly connected to the top of the lifting inner support plate (7), a fixed bottom box (14) is fixedly connected to the bottom of the support top platform (8), the fixed bottom box (14) is slidably connected to the support frame (5), a second linear module (15) is installed inside the fixed bottom box (14), a side moving frame (16) is installed on the moving slide of the second linear module (15), the side moving frame (16) is slidably connected to the support frame (5), a spraying box (17) is rotatably connected to the inner side of the side moving frame (16), a second motor (18) is installed on one side of the side moving frame (16), the output end of the second motor (18) is fixedly connected to the spraying box (17), a second inlet pipe (24) is fixedly connected to one side of the spraying box (17), a first inlet pipe (20) is fixedly connected to the inside of the spraying box (17), a ventilation ring (28) is fixedly connected to the inner side of the spraying box (17), one end of the first inlet pipe (20) is fixedly connected to the ventilation ring (28), a plurality of inner ventilation heads (29) are fixedly connected at equal intervals to the inner side of the ventilation ring (28), a spraying pipe (31) is fixedly connected to the inside of the spraying box (17), a ventilation net barrel (30) is fixedly connected to one side of the spraying pipe (31), a feeding pipe (19) is fixedly connected to the inside of the spraying box (17), and the feeding pipe (19) is fixedly connected to the spraying pipe (31).

2. The plasma spraying device according to claim 1, characterized in that, One end of each of the first inlet pipe (20) and the second inlet pipe (24) is fixedly connected with an internal thread sleeve (21), an external thread installation pipe (25) is threadedly installed inside the internal thread sleeve (21), a filter impurity net (40) is fixedly connected to the inside of the external thread installation pipe (25), one end of one of the external thread installation pipes (25) is fixedly connected with a hydrogen inlet pipe (22), and one end of the other external thread installation pipe (25) is fixedly connected with an argon inlet pipe (23).

3. A plasma spraying device according to claim 2, characterized in that, An external sealing cover (27) matched with the internal thread sleeve (21) is fixedly connected to the outside of the external thread installation pipe (25), and a plurality of external fixing blocks (26) are fixedly connected at equal intervals to the outside of the external thread installation pipe (25).

4. A plasma spraying device according to claim 3, characterized in that, A rotating rod (32) is rotatably connected inside the supporting top box (2). The top end of the rotating rod (32) is fixedly connected to a supporting disc (3). A first gear (33) is fixedly connected to the outer side of the rotating rod (32). A rack (34) is slidably connected inside the supporting top box (2). The rack (34) is meshed with the first gear (33). A cylinder (35) is installed inside the supporting top box (2). The output end of the cylinder (35) is fixedly connected to the rack (34).

5. A plasma spraying device according to claim 4, characterized in that, Rotating columns (36) are symmetrically and rotatably connected inside the supporting disc (3). A second gear (37) is fixedly connected to the outer side of the rotating column (36). Third gears (38) are symmetrically and rotatably connected inside the supporting disc (3). The third gears (38) are meshed with the second gears (37). Third motors (39) are symmetrically installed inside the supporting disc (3). The output ends of the third motors (39) are fixedly connected to the third gears (38).

6. The plasma spraying device according to claim 5, characterized in that, A first linear module (11) is installed inside the supporting table (1). The moving slide of the first linear module (11) is connected to the support frame (5).

7. The plasma spraying device according to claim 6, characterized in that, Limit blocks (12) are symmetrically and fixedly connected to the bottom of the support frame (5). The limit blocks (12) are slidably connected to the supporting table (1). A limit rod (13) is slidably connected inside the limit block (12). The limit rod (13) is fixedly connected to the supporting table (1).

8. A plasma spraying device according to claim 7, characterized in that, A first motor (10) is arranged inside the support frame (5). The output end of the first motor (10) is fixedly connected to an adjusting lead screw (6).

9. A plasma spraying device according to claim 8, wherein, Limit sliding rods (9) are symmetrically and fixedly connected to the bottom of the supporting top platform (8). The limit sliding rods (9) are slidably connected to the support frame (5).

10. A plasma spraying process, characterized in that, Including the following steps: S1. Pretreat the surface of the metal substrate, perform sandblasting, rinsing and drying treatments on the surface of the metal substrate; S2. Select ceramic powder and cermet powder according to the material, use environment and performance requirements of the metal substrate; S3. Check the state of the plasma spraying equipment, and adjust the spraying distance, spraying speed and plasma gas flow rate; S4. Preheat the metal substrate before spraying; S5. Start the plasma spraying equipment, feed the spraying powder into the plasma flame, and the powder melts at high temperature and is sprayed onto the surface of the metal substrate to form a uniform coating; S6. According to the application requirements and performance requirements of the metal substrate, perform multi-layer spraying, and use spraying powders with different compositions and performances for each layer; S7. Adopt a gradient coating design so that the coating gradually changes from the metal substrate to the surface to improve the overall performance and adaptability of the coating; S8. Introduce a recovery system for the spraying powder to recycle the unused powder; S9. After spraying, let the metal substrate and the coating adopt a forced cooling method; S10. Conduct appearance inspection, thickness measurement and hardness test on the coating; S11. Perform performance tests on the metal substrate treated by plasma spraying for corrosion resistance, wear resistance and high temperature resistance.

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