Passive swing arc electric arc double-wire additive manufacturing particle reinforced coating system

Abstract

The invention discloses a passive swing arc electric arc double-wire additive manufacturing particle reinforced coating system, which belongs to the technical field of surface modification equipment and comprises a workbench, a cladding coating welding gun, a side wire coaxial powder feeding particle reinforced system, a powder feeding mechanism, a wire feeding mechanism and a high-frequency reciprocating swing arc mechanism. The cladding coating welding gun is arranged on the vertical Z-axis platform; the side wire coaxial powder feeding particle reinforcing system comprises a coaxial powder feeding welding gun, and a powder feeding channel is formed in the coaxial powder feeding welding gun. The powder feeding mechanism is connected with the powder feeding channel; the wire feeding mechanism comprises a first wire feeding machine and a second wire feeding machine. Particle reinforcing materials carried by argon are accurately introduced into an electric arc molten pool through a side wire coaxial powder feeding particle reinforcing system, stable conveying and uniform distribution of particles are achieved under argon protection, a high-frequency reciprocating swing arc mechanism is adopted to drive a workpiece to rapidly swing in the width direction, and the uniformity and compactness of a formed coating are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of surface modification equipment technology, specifically relating to a passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system. Background Technology

[0002] With the continuous development of industrial technology, metal coating preparation technology has become increasingly mature. Among them, arc cladding technology is an important process widely used in coating production. Arc cladding coating is a surface modification technology that uses an electric arc as a heat source to melt welding wire to form a molten pool. Finally, multiple molten pools cool and overlap to form a surface coating. This cladding technology has advantages such as high deposition rate, high cladding quality, high efficiency, and low cost, making it a common modern surface modification technology.

[0003] Traditional arc cladding coating processes rely primarily on a single metal welding wire to form the cladding layer, lacking control over the reinforcing phase, resulting in coatings with low wear resistance and hardness. In recent years, researchers have introduced particle reinforcement mechanisms, using gas-carrying flow to deliver ceramic powder into the molten pool to form particle-reinforced composite coatings, thereby improving coating strength, heat resistance, and isotropy. Although coaxial powder feeding has achieved a certain degree of uniform particle injection, problems such as uneven uniformity and density in particle-reinforced aluminum composite coatings still exist.

[0004] To further improve the forming quality of particle-reinforced composite coatings, this application proposes a passive oscillating arc twin-wire additive manufacturing particle-reinforced coating system. Through a coaxial powder feeding system, argon-carried particle reinforcement material is precisely introduced into the arc molten pool. Under argon protection, stable particle delivery and uniform distribution are achieved, effectively improving the isotropy and comprehensive mechanical properties of the coating. Simultaneously, a high-frequency reciprocating oscillating arc mechanism drives the workpiece to achieve rapid oscillation in the width direction, enabling wide-width spreading of the molten pool even when the welding torch is stationary, significantly improving the uniformity and density of the formed coating. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A passive oscillating arc dual-wire additive manufacturing particle reinforcement coating system includes a worktable, a cladding coating welding torch, a side-wire coaxial powder feeding particle reinforcement system, a powder feeding mechanism, a wire feeding mechanism, and a high-frequency reciprocating oscillating arc mechanism set on the worktable to realize high-frequency reciprocating motion of the workpiece.

[0008] The worktable includes a two-axis moving platform and a vertical Z-axis platform, and the cladding coating welding torch is vertically and height-adjustable on the vertical Z-axis platform.

[0009] The coaxial powder feeding particle reinforcement system includes a coaxial powder feeding welding gun located on one side of the cladding coating welding gun and raised and lowered synchronously with the cladding coating welding gun. A powder feeding channel is provided around the welding wire conveying channel inside the coaxial powder feeding welding gun, and a powder feeding nozzle is provided at the end of the powder feeding channel.

[0010] The powder feeding mechanism is connected to the powder feeding channel;

[0011] The wire feeding mechanism includes a first wire feeder adapted to and connected to the cladding coating welding gun to feed wire, and a second wire feeder adapted to and connected to the coaxial powder feeding welding gun to feed wire.

[0012] Preferably, the high-frequency reciprocating pendulum mechanism is mounted on a two-axis moving platform, and the high-frequency reciprocating pendulum mechanism includes a workpiece mounting table and a reciprocating drive mechanism for driving the workpiece mounting table to perform linear reciprocating motion.

[0013] Preferably, the reciprocating drive mechanism includes a base, a reciprocating slide block that slides on the base along the width direction of the workpiece, and a reciprocating drive mechanism that drives the reciprocating slide block to perform reciprocating linear motion.

[0014] The workpiece mounting platform is fixedly mounted on the reciprocating slide.

[0015] Preferably, the two-axis moving platform includes a horizontal Y-axis platform, and a horizontal X-axis platform is provided on the upper part of the horizontal Y-axis platform;

[0016] A conveyor belt is provided on the horizontal X-axis platform to enable the workpiece to move along the length of the horizontal X-axis platform.

[0017] A conveyor belt is provided on the horizontal Y-axis platform to enable the horizontal X-axis platform to move along the length of the horizontal Y-axis platform;

[0018] The length direction of the horizontal X-axis platform is perpendicular to the length direction of the horizontal Y-axis platform.

[0019] Preferably, a conveyor belt is provided on the vertical Z-axis platform to enable the cladding coating welding torch to move in the vertical direction.

[0020] Preferably, the cladding coating welding torch is adapted to be connected to a clamping mechanism, the clamping mechanism including a clamping seat disposed on a vertical Z-axis platform and a double-jaw mechanism disposed at the bottom of the clamping seat;

[0021] The dual-jaw mechanism includes a jaw body, with two clamps at both ends of the jaw body. One clamp is fastened to the clamping spindle at the bottom of the clamping seat, and the other clamp is fastened to the cladding coating welding torch.

[0022] Preferably, the coaxial powder feeding welding gun is connected to the gripper body via a connecting bracket.

[0023] Preferably, the gripper body is provided with a bypass wire connection mechanism, the other end of which is connected to the wire guide tube of the coaxial powder feeding welding gun. The bypass wire connection mechanism is provided with a flow divider, the inlet of which is connected to the powder feeding mechanism, and each outlet of which is connected to the corresponding powder feeding channel via a pipeline.

[0024] Preferably, the bypass wire connection mechanism includes a bypass wire connector whose lower end is sleeved outside the guide wire tube, the upper end of the bypass wire connector is connected to one side plate of the L-shaped connecting plate, the other side plate of the L-shaped connecting plate is connected to one right-angle side plate of the right-angle connecting plate, and the other right-angle side plate of the right-angle connecting plate is connected to the gripper body.

[0025] Preferably, the powder feeding mechanism includes a powder barrel, the inlet of which is connected to an argon gas source via a pipeline, and the outlet of which is connected to the inlet of a distributor via a pipeline.

[0026] The beneficial effects of this invention are:

[0027] (1) The present invention uses a side wire coaxial powder feeding particle reinforcement system to accurately introduce argon-carried particle reinforcement material into the electric arc molten pool. Under the protection of argon, the particles are stably transported and uniformly distributed, effectively improving the isotropy and comprehensive mechanical properties of the coating. At the same time, a high-frequency reciprocating swing arc mechanism is used to drive the workpiece to achieve rapid swing in the width direction, so that the molten pool can achieve wide spreading under the condition that the welding gun is stationary, which significantly improves the uniformity and density of the formed coating.

[0028] (2) Compared with the traditional swing arc, the high-frequency reciprocating swing arc mechanism in this application drives the workpiece to swing rapidly in the width direction, which can not only uniformly input the arc heat, but also vibrate the molten pool during the swing, uniformize the particles, improve the forming quality and reduce splashing; the side wire coaxial powder feeding particle reinforcement system in this application can improve manufacturing efficiency, increase particle capture rate and reduce cost. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0030] Figure 1 This is a schematic three-dimensional view of the passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system of the present invention;

[0031] Figure 2 This is a schematic front view of the passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system of the present invention;

[0032] Figure 3This is a schematic diagram of the structure of the cladding coating welding torch, the side wire coaxial powder feeding particle reinforcement system, and the high-frequency reciprocating swing arc mechanism in this invention;

[0033] Figure 4 This is a schematic diagram of the structure of the cladding coating welding torch and the side wire coaxial powder feeding particle reinforcement system in this invention;

[0034] Figure 5 This is a schematic diagram of the double gripper mechanism in this invention;

[0035] Figure 6 This is a schematic diagram of the powder feeding channel in the coaxial powder feeding welding torch of the present invention. Figure 1 ;

[0036] Figure 7 This is a schematic diagram of the powder feeding channel in the coaxial powder feeding welding torch of the present invention. Figure 2 ;

[0037] in:

[0038] 1. Worktable; 11. Vertical Z-axis platform; 12. Horizontal Y-axis platform; 13. Horizontal X-axis platform; 2. Cladding coating welding torch; 3. Side wire coaxial powder feeding particle reinforcement system; 31. Coaxial powder feeding welding torch; 311. Powder feeding channel; 312. Powder feeding nozzle; 32. Connecting bracket; 33. Wire guide tube; 34. Diverter; 35. Side wire connector; 36. L-shaped connecting plate; 37. Right angle connecting plate; 4. Powder feeding mechanism; 41. Powder bucket; 5. Wire feeding mechanism; 6. High-frequency reciprocating arc mechanism; 61. Workpiece mounting table; 62. Base; 63. Reciprocating slide; 7. Workpiece; 8. Clamping mechanism; 81. Clamping seat; 82. Double jaw mechanism; 83. Clamp; 9. Arc cladding coating power supply; 10. Worktable control cabinet. Detailed Implementation

[0039] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] In this invention, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely relational terms determined for the convenience of describing the structural relationship of the various components or elements of this invention, and do not specifically refer to any component or element in this invention, and should not be construed as limiting this invention.

[0042] In this invention, terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0044] See Figures 1 to 7 As shown, a passive oscillating arc dual-wire additive manufacturing particle reinforcement coating system includes a worktable 1, a cladding coating welding torch 2, a side-wire coaxial powder feeding particle reinforcement system 3, a powder feeding mechanism 4, a wire feeding mechanism 5, and a high-frequency reciprocating oscillating arc mechanism 6 disposed on the worktable 1 to realize the high-frequency reciprocating motion of the workpiece 7; wherein the high-frequency reciprocating arc mechanism 6 enables the workpiece 7 to perform reciprocating linear motion with a frequency of 10 Hz and a stroke of 8 mm.

[0045] The workbench 1 includes a two-axis moving platform and a vertical Z-axis platform 11, and the cladding coating welding torch 2 is vertically and vertically mounted on the vertical Z-axis platform 11.

[0046] The coaxial powder feeding particle reinforcement system 3 includes a coaxial powder feeding welding gun 31 located on one side of the cladding coating welding gun 2 and raised and lowered synchronously with the cladding coating welding gun 2. A powder feeding channel 311 is provided around the welding wire feeding channel inside the coaxial powder feeding welding gun 31, and a powder feeding nozzle 312 is provided at the end of the powder feeding channel 311.

[0047] The powder feeding mechanism 4 is connected to the powder feeding channel 311;

[0048] The wire feeding mechanism 5 includes a first wire feeder adapted to and connected to the cladding coating welding torch 2 to feed wire, and a second wire feeder adapted to and connected to the coaxial powder feeding welding torch 31 to feed wire.

[0049] The device also includes an arc cladding coating power supply 9 and a worktable control cabinet 10. The wire feeding mechanism 5 is placed on the outer shell of the arc cladding coating power supply 9. The arc cladding coating power supply 9 supplies power to the electrical components in the entire device. The worktable control cabinet 10 controls the movement of the conveyor belts on the horizontal Y-axis platform 12 and the horizontal X-axis platform 13 to realize the movement of the workpiece 7, and controls the movement of the conveyor belt on the vertical Z-axis platform 11 to realize the synchronous lifting and lowering of the cladding coating welding torch 2 and the coaxial powder feeding welding torch 31.

[0050] Preferably, the high-frequency reciprocating pendulum mechanism 6 is mounted on a two-axis moving platform. The high-frequency reciprocating pendulum mechanism 6 includes a workpiece mounting table 61 and a reciprocating drive mechanism for driving the workpiece mounting table 61 to perform linear reciprocating motion.

[0051] Preferably, the reciprocating drive mechanism includes a base 62, a reciprocating slide 63 that slides on the base 62 along the width direction of the workpiece 7, and a reciprocating drive mechanism for driving the reciprocating slide 63 to perform reciprocating linear motion.

[0052] The workpiece mounting platform 61 is fixedly mounted on the reciprocating slide 63.

[0053] The reciprocating drive mechanism can be implemented using existing technology. For example, the reciprocating drive mechanism includes a motor mounted on the base 62, with the output end of the motor coaxially fixedly connected to the lead screw. The reciprocating slide 63 is provided with a nut that cooperates with the lead screw. Under the threaded engagement of the lead screw and the nut, and the sliding limit engagement of the reciprocating slide 63 and the base 62, when the motor alternates between forward and reverse rotation, the reciprocating slide 63 can achieve reciprocating linear motion along the base 62.

[0054] Preferably, the two-axis moving platform includes a horizontal Y-axis platform 12, and a horizontal X-axis platform 13 is provided on the upper part of the horizontal Y-axis platform 12, wherein the base 62 is located on the horizontal X-axis platform 13;

[0055] A conveyor belt is provided on the horizontal X-axis platform 13 to enable the workpiece 7 to move along the length direction of the horizontal X-axis platform 13; wherein the length direction of the workpiece 7 is consistent with the length direction of the horizontal X-axis platform 13.

[0056] A conveyor belt is provided on the horizontal Y-axis platform 12 to enable the horizontal X-axis platform 13 to move along the length direction of the horizontal Y-axis platform 12;

[0057] The length direction of the horizontal X-axis platform 13 is perpendicular to the length direction of the horizontal Y-axis platform 12.

[0058] Preferably, a conveyor belt is provided on the vertical Z-axis platform 11 to enable the cladding coating welding torch 2 to move in the vertical direction.

[0059] Preferably, the cladding coating welding torch 2 is adapted to be connected to a clamping mechanism 8. The clamping mechanism 8 includes a clamping seat 81 disposed on the vertical Z-axis platform 11 and a double-jaw mechanism 82 disposed at the bottom of the clamping seat 81. Specifically, the clamping seat 81 is disposed on the conveyor belt on the vertical Z-axis platform 11.

[0060] The dual-jaw mechanism 82 includes a jaw body, with two clamps 83 at both ends. One clamp 83 is fastened to the clamping spindle at the lower part of the clamping seat 81, and the other clamp 83 is fastened to the cladding coating welding torch 2. In this application, the clamping mechanism 8 is made of insulating material, thereby insulating the cladding coating welding torch 2 from the vertical Z-axis platform 11.

[0061] Preferably, the coaxial powder feeding welding gun 31 is connected to the gripper body via a connecting bracket 32.

[0062] Preferably, the gripper body is provided with a bypass wire connection mechanism, the other end of which is connected to the wire guide tube 33 of the coaxial powder feeding welding gun 31. A distributor 34 is provided on the bypass wire connection mechanism, the inlet of which is connected to the powder feeding mechanism 4, and each outlet of the distributor 34 is connected to a corresponding powder feeding channel 311 via a pipe connection. In this application, the distributor 34 has three outlets. Three powder feeding channels 311 are evenly arranged circumferentially around the outer periphery of the welding wire feeding channel inside the coaxial powder feeding welding gun 31, and the three outlets of the distributor 34 are connected to the corresponding powder feeding channels 311 via pipe connections.

[0063] Preferably, the bypass wire connection mechanism includes a bypass wire connector 35 whose lower end is sleeved outside the guide wire tube 33. The upper end of the bypass wire connector 35 is connected to one side plate of the L-shaped connecting plate 36. The other side plate of the L-shaped connecting plate 36 is connected to one right-angle side plate of the right-angle connecting plate 37. The other right-angle side plate of the right-angle connecting plate 37 is connected to the gripper body.

[0064] Specifically, the upper end of the side wire connector 35 is connected to one side plate of the L-shaped connecting plate 36 by a set of matching bolts and nuts, the other side plate of the L-shaped connecting plate 36 is connected to one right-angle side plate of the right-angle connecting plate 37 by a set of matching bolts and nuts, and the other right-angle side plate of the right-angle connecting plate 37 is connected to the gripper body by two sets of matching bolts and nuts.

[0065] Preferably, the powder feeding mechanism 4 includes a powder barrel 41 containing particulate reinforcing material, such as ceramic particles. The inlet of the powder barrel 41 is connected to an argon gas source via a pipeline, and the outlet of the powder barrel 41 is connected to the inlet of the distributor 34 via a pipeline.

[0066] When the passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system of the present invention is working, the arc between the welding wires of the cladding coating welding torch 2 and the coaxial powder feeding welding torch 31 and the workpiece 7 generates a high-temperature molten pool. The high-frequency reciprocating arc mechanism 6 controls the high-frequency reciprocating motion of the workpiece 7 to achieve a wider range of molten coverage, thereby improving the coating uniformity and fusion quality. With the side wire coaxial powder feeding particle reinforcement system 3, the particle reinforcement material is injected into the molten pool by the powder feeding mechanism 4 through the powder feeding nozzle 312 with the argon gas flow, and a dense particle-reinforced composite coating is formed under the action of the arc heat source.

[0067] This invention utilizes a coaxial powder feeding system 3 to precisely introduce argon-carried particle reinforcement material into the molten arc pool. Under argon protection, stable particle delivery and uniform distribution are achieved, effectively improving the isotropy and comprehensive mechanical properties of the coating. Simultaneously, a high-frequency reciprocating swing mechanism 6 drives the workpiece 7 to rapidly swing in the width direction, enabling wide-width spreading of the molten pool even when the welding torch is stationary, significantly improving the uniformity and density of the formed coating. Compared to traditional swing arc welding, the high-frequency reciprocating swing mechanism 6 in this application avoids heat source oscillation by driving the workpiece 7 to swing rapidly in the width direction. This not only ensures uniform arc heat input but also vibrates the molten pool during swinging, uniformizing particles, improving forming quality, and reducing spatter. The coaxial powder feeding system in this application improves manufacturing efficiency, increases particle capture rate, and reduces costs. The overall structure of this application is simple, enhances system stability and reliability, and is compact, making it suitable for deployment in small and medium-sized automated equipment, with promising application prospects.

[0068] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they are not intended to limit the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system, characterized in that, It includes a worktable, a cladding coating welding torch, a side wire coaxial powder feeding particle reinforcement system, a powder feeding mechanism, a wire feeding mechanism, and a high-frequency reciprocating swing arc mechanism set on the worktable to realize the high-frequency reciprocating motion of the workpiece. The worktable includes a two-axis moving platform and a vertical Z-axis platform, and the cladding coating welding torch is vertically and height-adjustable on the vertical Z-axis platform. The coaxial powder feeding particle reinforcement system includes a coaxial powder feeding welding gun located on one side of the cladding coating welding gun and raised and lowered synchronously with the cladding coating welding gun. A powder feeding channel is provided around the welding wire conveying channel inside the coaxial powder feeding welding gun, and a powder feeding nozzle is provided at the end of the powder feeding channel. The powder feeding mechanism is connected to the powder feeding channel; The wire feeding mechanism includes a first wire feeder adapted to and connected to the cladding coating welding gun to feed wire, and a second wire feeder adapted to and connected to the coaxial powder feeding welding gun to feed wire.

2. The passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system as described in claim 1, characterized in that, The high-frequency reciprocating pendulum mechanism is mounted on a two-axis moving platform. The high-frequency reciprocating pendulum mechanism includes a workpiece mounting table and a reciprocating drive mechanism for driving the workpiece mounting table to perform linear reciprocating motion.

3. The passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system as described in claim 2, characterized in that, The reciprocating drive mechanism includes a base, a reciprocating slide block that slides on the base along the width direction of the workpiece, and a reciprocating drive mechanism that drives the reciprocating slide block to perform reciprocating linear motion. The workpiece mounting platform is fixedly mounted on the reciprocating slide.

4. The passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system as described in claim 1, characterized in that, The two-axis moving platform includes a horizontal Y-axis platform, and a horizontal X-axis platform is provided on the upper part of the horizontal Y-axis platform; A conveyor belt is provided on the horizontal X-axis platform to enable the workpiece to move along the length of the horizontal X-axis platform. A conveyor belt is provided on the horizontal Y-axis platform to enable the horizontal X-axis platform to move along the length of the horizontal Y-axis platform; The length direction of the horizontal X-axis platform is perpendicular to the length direction of the horizontal Y-axis platform.

5. The passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system as described in claim 1, characterized in that, A conveyor belt is provided on the vertical Z-axis platform to enable the cladding coating welding torch to move vertically.

6. The passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system as described in claim 1, characterized in that, The cladding coating welding torch is adapted to be connected to a clamping mechanism, which includes a clamping seat set on a vertical Z-axis platform and a double-jaw mechanism set at the bottom of the clamping seat. The dual-jaw mechanism includes a jaw body, with two clamps at both ends of the jaw body. One clamp is fastened to the clamping spindle at the bottom of the clamping seat, and the other clamp is fastened to the cladding coating welding torch.

7. The passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system as described in claim 6, characterized in that, The coaxial powder feeding welding gun is connected to the gripper body via a connecting bracket.

8. The passive oscillating arc twin-wire additive manufacturing particle-reinforced coating system as described in claim 6, characterized in that, The gripper body is provided with a bypass wire connection mechanism. The other end of the bypass wire connection mechanism is connected to the wire guide tube of the coaxial powder feeding welding gun. The bypass wire connection mechanism is provided with a flow divider. The inlet of the flow divider is connected to the powder feeding mechanism. Each outlet of the flow divider is connected to the corresponding powder feeding channel via a pipeline.

9. The passive oscillating arc twin-wire additive manufacturing particle-reinforced coating system as described in claim 8, characterized in that, The bypass wire connection mechanism includes a bypass wire connector whose lower end is sleeved outside the guide wire tube. The upper end of the bypass wire connector is connected to one side plate of the L-shaped connecting plate. The other side plate of the L-shaped connecting plate is connected to one right-angle side plate of the right-angle connecting plate. The other right-angle side plate of the right-angle connecting plate is connected to the gripper body.

10. The passive oscillating arc twin-wire additive manufacturing particle-reinforced coating system as described in claim 8, characterized in that, The powder feeding mechanism includes a powder barrel, the inlet of which is connected to an argon gas source via a pipeline, and the outlet of which is connected to the inlet of a distributor via a pipeline.

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