A non-slip powder coating spray process

Abstract

The present application relates to the technical field of anti-skid powder spraying, in particular to an anti-skid powder coating spraying process, comprising: S1: loading anti-skid metal powder into a spraying device; S2: starting the spraying device and igniting the spraying device; S3: spraying the metal powder, which is melted by flame heating, to the surface of a workpiece from the nozzle of the spraying device to form an anti-skid coating layer; compared with the existing anti-skid powder spraying process, the spraying device is portable, the spraying device fixes the shaft parts through the fixing part, drives the nozzle to rotate and spray the workpiece through the rotating part, and after each rotation of the rotating part, the nozzle is driven to move a set unit distance along the axis direction of the part through the limiting guide. Compared with the process of auxiliary spraying in the machine tool, it is more convenient, applicable to more use scenarios, easier to control, lower in cost of control equipment, the relationship between the rotation of the nozzle and the linear motion is not easily disturbed, and the coating is more uniform and stable.

Description

A process for applying anti-slip powder coating Technical Field

[0001] This invention relates to the field of anti-slip powder coating technology, specifically to an anti-slip powder coating process. Background Technology

[0002] Anti-slip powder coating is a process in which anti-slip powder is sprayed onto the surface of a workpiece to form an anti-slip coating. It is mainly used for anti-slip treatment of workpieces. Anti-slip powders are mainly divided into metallic powders and non-metallic powders. Metallic anti-slip powders are widely used because they do not use toxic solvents, the anti-slip coating formed has a long lifespan, and the coefficient of friction is stable.

[0003] The spraying of metal anti-slip powder mainly employs flame spraying and supersonic flame spraying. Both methods utilize a flame to heat the metal powder, melting it before it hits the workpiece surface. Upon impact, the molten metal powder forms a metal-based anti-slip coating. While flame spraying produces a metal-based anti-slip coating with lower performance than supersonic flame spraying, it offers advantages such as simpler equipment structure, lower manufacturing costs, lower consumption costs, less stringent process requirements, and lower safety requirements. It only requires a gas cylinder, powder feeding equipment, and a nozzle. Due to its lower equipment requirements, it is applicable to a wider range of environments and can be used for anti-slip coating repair in various conditions.

[0004] Existing flame spraying equipment utilizes a machine tool to rotate shaft-like parts, with a nozzle applying flame spray to the rotating parts to form an anti-slip coating. During the spraying process, the nozzle moves in conjunction with a guide rail to ensure a uniform anti-slip coating is formed on the outer surface of the shaft-like parts. However, the auxiliary equipment used in spraying is bulky and difficult to move. Furthermore, the machine tool and guide rail are controlled independently by separate electronic control systems, and their synchronization is prone to deviation due to changes in control parameters or system errors. This can lead to asynchrony between the rotation of the workpiece and the movement of the guide rail, resulting in uneven application of the anti-slip coating.

[0005] Meanwhile, in the process of repairing anti-slip coatings on workpieces outside of production areas, for example, if a customer purchases a shaft part that has been coated with anti-slip powder and needs to repair the coating after prolonged use, the customer often lacks machine tools or robotic arms to assist in controlling the spray head. This requires manual spraying of the workpiece with the spray head. During the process of spraying anti-slip powder onto the surface of the shaft part, the worker needs to rotate the shaft while spraying, and simultaneously control the speed at which the spray head moves along the axis of the part. This makes it difficult to control the thickness of the anti-slip coating, resulting in uneven coating on the workpiece surface and substandard repair quality. This necessitates further processing of the workpiece and also wastes energy and materials during the spraying process. Because some shaft parts that require anti-slip spraying repair are not easy to completely remove, for example, some shaft parts are fixed on the frame at one end or have too many things installed at one end, making it inconvenient to remove the entire shaft. They can only be fixed to the equipment like a cantilever beam. In this case, the part cannot be rotated, and the spray head needs to be manually driven to rotate along the outer ring of the part during spraying repair. This further leads to uneven anti-slip coating and low spraying efficiency.

[0006] To address this issue, a non-slip powder coating spraying process is proposed. This process solves the problems of low spraying efficiency, energy waste, and uneven coating caused by the difficulty in manually controlling the nozzle to uniformly coat the outer surface of shaft parts when flame spraying equipment is difficult to move to various environments and when applying a non-slip coating to shaft parts without the assistance of appropriate equipment. Simultaneously, the process ensures that the relative rotation between the shaft part and the nozzle remains synchronized with the movement of the nozzle along the part's axis during the spraying repair process, guaranteeing a uniform non-slip coating after repair. Summary of the Invention

[0007] The purpose of this invention is to provide an anti-slip powder coating spraying process. This process utilizes the principle that the rotation of the shaft's axis leads to more uniform spraying of the anti-slip powder coating, thereby ensuring process quality and achieving high-quality spraying. Simultaneously, a portable flame spraying auxiliary device is provided for this process. This allows the flame spraying nozzle to rotate around the shaft's axis during anti-slip coating repair, uniformly spraying the outer surface of the shaft. Furthermore, the nozzle can move synchronously along the axis of the part during rotation. This solves the problem of uneven spraying when using existing auxiliary equipment that is difficult to move, or when the shaft cannot be completely removed and cannot be rotated, resulting in a cantilever structure suspended on the equipment, requiring manual control of the nozzle for anti-slip powder spraying. This improves the applicability of flame spraying for anti-slip powder coating of shafts and ensures spraying quality in such situations.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A process for applying anti-slip powder coating includes:

[0010] S1: Load the anti-slip metal powder into the spraying equipment;

[0011] S2: Start the spraying equipment and ignite it;

[0012] S3: Metal powder is heated and melted by a flame from the nozzle of the spraying equipment and then sprayed onto the surface of the workpiece to form an anti-slip coating;

[0013] Spraying equipment is used during spraying, and this equipment includes:

[0014] The fixing part is used to fix the shaft part to the equipment. The fixing part can be a three-jaw chuck, or it can be a screw to lock the equipment and the part to each other, or it can be a clamping method to lock the part and the equipment to each other, or other fixing methods that can fix the equipment and the part to each other.

[0015] The rotating part is provided on the fixed part. The rotating part can rotate relative to the fixed part. The rotating part can be a cylinder concentric with the shaft part fixed on the fixed part, or a round rod parallel to the shaft part fixed on the fixed part but rotating along the axis of the shaft part, or a device or mechanism that can rotate around the fixed shaft part.

[0016] The driving unit is mounted on the fixed unit and drives the rotating unit to rotate in a set direction. The driving unit can be a servo motor, a stepper motor, or other device or mechanism that can drive the rotating unit to rotate.

[0017] The nozzle, used for flame spraying, is mounted on a rotating part and faces the axis of rotation of the rotating part, i.e., the axis of the shaft-like part to be sprayed, which is fixed on the fixed part. The nozzle rotates together with the rotating part and is connected to an external fuel source and an external powder source for providing metal powder. During the spraying process, the nozzle sprays the shaft-like part fixed on the fixed part while rotating around the shaft-like part with the rotating part, achieving uniform spraying of the shaft-like part. At the same time, in situations where it is inconvenient to remove the part and the part cannot be rotated, as long as the fixed part is fixed to the part, the part can still be uniformly sprayed without the need for manual rotation of the nozzle around the workpiece, thus improving the stability of the spraying process and spraying quality.

[0018] After each complete rotation, the rotating part guides the nozzle to move a predetermined unit distance along the workpiece's axis via a limiting mechanism. This limiting guide method controls the nozzle's movement along the workpiece's axis, ensuring a precise relationship between the nozzle's rotation around the workpiece and its translational motion along the axis. Compared to existing systems, this eliminates the need for complex control systems, reducing control complexity and improving ease of use, making the equipment suitable for a wider range of environments. Furthermore, the relationship between the nozzle's rotation and translation remains constant regardless of changes in the control system, resulting in higher synchronization and improved uniformity of the coating applied during the spraying process.

[0019] Preferably, the rotating part includes two annular end plates, and multiple fixing rods are fixedly installed between the two end plates. The fixing rods are evenly distributed circumferentially between the two end plates, with the axis of the end plates as a reference. One of the end plates is rotatably mounted on the fixed part, and a rotating ring is slidably installed among the multiple fixing rods. The nozzle is fixedly mounted on the rotating ring, and the nozzle faces the axial direction of the two end plates. A guide plate is fixedly installed on the fixed part. To minimize the weight of the equipment, the guide plate can be made of plastic. The length of the guide plate spans the distance between the two end plates. The guide plate is parallel to the fixing rods. Multiple guide plates are provided on the guide plate, and the guide plates are made of steel. To ensure the strength of the guide plates without excessively increasing the weight of the equipment, the thickness of the guide plates is selected between 2-4mm. The guide plates are arranged parallel to each other, and the projected length of each guide plate in the direction of the end plate axis is the unit distance the nozzle moves in the direction of the part axis. Users can select the required length and tilt angle of the guide plates according to the range of the nozzle's flame, and the guide plates are evenly distributed throughout the entire guide plate. Two sides of each guide plate are tilted towards the two end plates respectively. A guide block is provided on the outer side of the rotating ring to cooperate with the guide plates. Each time the rotating ring rotates, the guide block passes through the gap between the next guide plate. It should be noted that the tilt of the guide plates must at least ensure that the end of each guide plate overlaps with the projection of the starting segment of the next guide plate in the direction of the end plate axis. In this way, during the guiding process, it can be ensured that the guide block enters the gap between the next adjacent guide plate with the guidance of the guide plates with each rotation, achieving uniform displacement of the nozzle in the direction of the shaft-like part axis.

[0020] During use, the shaft-like parts to be sprayed are inserted into the two annular end plates and fixedly mounted on the fixed part. The drive unit drives the end plate at one end of the fixed part near the rotating part to rotate. The end plate drives the multiple fixed rods fixed on it and the end plate at the other end to rotate. The rotating ring and its nozzle also rotate with the end plate. During the spraying process, the nozzle can evenly spray around the surface of the shaft-like parts, which is more uniform than manual spraying. At the same time, because the outer wall of the rotating ring is equipped with a guide block, the initial position of the guide block is opposite to the center of the guide plate and located between two guide plates. Each time the guide block rotates with the rotating ring, it will enter the gap of the next guide plate and be guided in the inclined direction by the guide plate. While being guided by the guide plate, the guide block will drive the rotating ring to slide on the fixed rod along the direction guided by the guide plate. The nozzle will also move along the axis of the part with the rotating ring. Compared with manual control, the displacement distance is more stable, the spraying efficiency is higher, and the quality of the sprayed coating is better. It should be noted that the external gas source that provides fuel to the nozzle and the external powder source that provides anti-slip metal powder should be located on the side of the end plate away from the fixed part. The pipe connecting the nozzle should also pass through the round opening in the center of the annular end plate and connect to the nozzle to avoid the pipe getting tangled on the nozzle parts during the nozzle rotation process.

[0021] Preferably, the fixing part is provided with a sleeve that cooperates with the guide plate. The sleeve is made of metal or plastic. When it is made of metal, the thickness of the sleeve is selected to be 2-5mm. If it is made of plastic, 4-8mm can be considered. The sleeve is concentric with the end plate. The sleeve and the guide plate together form a complete cylinder. The sleeve is provided with a plurality of guide rings that cooperate with the guide plates. The guide rings are made of wear-resistant alloy and the surface roughness of the guide rings is lower than Ra12.5. The distance between every two guide rings is equal to the distance between two adjacent guide plates. The guide rings are fixedly connected to the sleeve by welding or gluing. Each guide plate has two adjacent guide rings connected to its two ends.

[0022] The sleeve and guide plate together form a complete cylinder, enclosing the rotating ring inside. During anti-slip spraying, this prevents molten metal powder from splashing onto the user after impacting the workpiece, ensuring user safety. Simultaneously, the guide ring inside the sleeve ensures the guide block is always held between the two guide rings as it moves with the rotating ring. This prevents the rotating ring from sliding under its own weight after the guide block has moved a set distance along the workpiece axis due to the tilt of the fixing rod, which would otherwise cause a mismatch between the nozzle's displacement along the workpiece axis and the nozzle's rotation around the workpiece.

[0023] With the addition of guide rings, after each guide plate guides the guide block towards the axis of the part, the guide block is restrained in the middle by the two guide rings after leaving the guide plate. Therefore, even if the equipment is not perfectly horizontal during installation, the spray head can maintain a constant relationship between rotation and linear motion, ensuring the stability of spraying. At the same time, with the addition of guide rings, the equipment can be installed vertically. With the cooperation of the guide plate, guide rings, and guide block, the vertically mounted rotating ring will not slip down due to its own weight during operation, improving the environmental adaptability of the equipment. When spraying certain shaft-like parts that cannot be removed, the equipment can be fitted onto the part, improving the convenience of the equipment.

[0024] Preferably, an annular air guide groove is provided on one end face of the rotating ring, and a sealing ring made of steel is provided above the air guide groove. The sealing ring and the air guide groove form a mechanical seal and a sealed space between them. While sealing the air guide groove, the sealing ring can also rotate along the air guide groove inside it. The external gas source and powder source are connected to the sealing ring via pipes and pass through the sealing ring into the sealed space. An air guide hole is provided inside the air guide groove. The air guide hole is opened along the side wall of the rotating ring and finally folds out from the inner wall of the rotating ring in the direction of the rotating ring's axis. The nozzle is connected to the port of the air guide hole located on the inner wall of the rotating ring. Although the external powder source and gas source are located on the side of the end plate away from the fixed part, and the pipe connected to the spraying is connected to the nozzle through the end plate, the pipe may still get tangled on the parts when rotating with the spraying, causing the equipment to jam. By incorporating a gas guide groove and a sealing ring, the gas and metal powder mix inside the sealed space of the sealing ring before entering the gas guide hole. Finally, the mixture is ejected from the nozzle connected to the gas guide hole. Ignition at the nozzle port ignites the gas, and the flame heats and melts the anti-slip metal powder ejected from inside the nozzle, which is then sprayed onto the part to form an anti-slip coating. The sealing ring and the gas guide groove can rotate relative to each other, ensuring that when the rotating ring drives the nozzle to rotate for spraying, the pipes connecting the nozzle to the external gas and powder sources do not rotate with the ring. This further prevents the pipes from becoming entangled between the workpiece during the spraying process, thus improving the stability of the equipment.

[0025] Preferably, there are one or more air guide holes and nozzles, which are evenly distributed circumferentially on the rotating ring. By setting air guide grooves and sealing rings, and forming a sealed space through their cooperation, the fuel gas and anti-slip metal powder are mixed within the sealed space. In this way, if it is necessary to improve work efficiency, multiple air guide holes can be set on the rotating ring, and a nozzle can be connected to each air guide hole. In this way, the number of layers of the nozzles can be sprayed on the surface of the part in one rotation of the rotating ring, which greatly improves work efficiency. At the same time, since the fuel and anti-slip metal powder enter the sealed space and are then distributed to each nozzle, it is not necessary to connect each nozzle to the fuel gas source and powder source with a pipe. This avoids the obstruction of the spraying process by the pipes of multiple nozzles and improves the structural simplicity of the equipment.

[0026] Preferably, there are one or more guide blocks. When there are multiple guide blocks, they are evenly arranged along the axis of the rotating ring, and the multiple rotating blocks are sequentially inserted into the gaps between the guide rings. The multiple guide blocks are arranged in parallel, and each guide block is engaged in the gap between different guide plates. Each guide block slides along the gap between its corresponding guide ring and guide plate as it rotates with the rotating ring. The more guide blocks there are, the more stable the rotation of the rotating ring and its movement along the axis of the part. However, the higher the precision requirements for the installation and fit between the guide blocks, guide plates, and guide rings, the more difficult the installation becomes. Conversely, when the equipment is set vertically, as the guide blocks move upwards while engaged between the guide rings and guide plates, the rotating ring tends to move downwards due to its own gravity. The guide blocks, engaged between the guide rings and guide plates, prevent the rotating ring from moving downwards. The more guide blocks there are, the smaller the force on each individual guide block, and the higher its strength.

[0027] Preferably, the guide blocks are all cylindrical, and the axis of the guide block is perpendicular to the axis of the rotating ring. The cylindrical guide blocks make line contact with the guide ring and guide plates, and can better overcome sharp edges or gaps between the guide plates and the guide ring without getting stuck. This reduces the precision requirements for the fit between the guide plates and the guide ring, and improves the operational stability of the equipment.

[0028] Optionally, all guide blocks are spherical. When the spherical guide block slides between the guide plate and the guide ring, the contact between them is point contact, allowing the rotating ring to rotate more smoothly. Simultaneously, even if anti-slip powder gets into the gaps between the guide plate and the guide ring, the spherical guide block is less likely to jam, further improving the stability of the equipment. However, the connection points between the spherical guide block and the rotating ring are limited during installation, resulting in lower connection strength compared to cylindrical guide blocks.

[0029] Furthermore, each of the guide blocks and the rotating ring are rotatably mounted. The rotatably mounted spherical or cylindrical guide blocks can further reduce the friction between the guide blocks and the surfaces of the guide ring and guide plates, making the rotating ring smoother during rotation and reducing the chance of jamming. At the same time, because the friction is reduced, the service life of the guide blocks, guide rings and guide plates is also improved.

[0030] Preferably, the rotating part and the driving part are connected by gear transmission, chain transmission, or worm gear transmission. Gear transmission, chain transmission, and worm gear transmission ensure that the rotating part is fully driven by the driving part during rotation, without slippage as seen in belt transmission. When the equipment is horizontally installed, if a belt transmission is used to connect the rotating part and the driving part, slippage between the rotating part and the belt will cause changes in the spraying rate, resulting in a difference in the anti-slip coating of the slipped section compared to the non-slipped section, leading to uneven spraying quality. Gear transmission, chain transmission, and worm gear transmission ensure stable control of the rotating part by the driving part, preventing slippage and guaranteeing the stability of the spraying quality.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. The anti-slip powder coating spraying process described in this invention utilizes a spray head that rotates and sprays around a shaft-like part while simultaneously moving towards the axis of the shaft-like part to achieve uniform spraying and ensure coating quality. Compared to existing powder coating processes, this invention provides process-assisted spraying with equipment that can rotate the spray head around the shaft-like part to be coated for uniform spraying. After clamping the shaft-like part onto the equipment or fixing the equipment onto the shaft-like part, the spray head rotates and sprays the shaft-like part while automatically moving towards the axis of the uncoated shaft-like part after completing one rotation, automatically changing the spraying position. Compared to existing process-assisted spraying equipment, this method is more convenient to move, easier to use, and applicable to a wider range of scenarios. Even shaft-like parts in a cantilever beam state that cannot be completely disassembled can be coated with anti-slip powder. Compared to manually controlling the spray head for anti-slip powder spraying, the spraying effect is more stable, and the resulting coating is more uniform.

[0033] 2. The anti-slip powder coating spraying process described in this invention utilizes the mechanical cooperation of guide plates and guide blocks when using spraying equipment to drive the spray head to spray around shaft-like parts. Each rotation of the rotating ring causes the spray head to pass through the guide plate after one revolution, and under the guidance of the guide plate, it rotates and sprays towards the next unsprayed section of the part. Compared to existing methods using machine tools with guide rails or robotic arms for spraying assistance, and compared to using electronic control systems to control the rotation and linear movement of the spray head, the equipment structure is simpler, the mechanical control is simpler, the control equipment cost is lower, and it is easier to move. Furthermore, the rotation and linear movement of the spray head are not affected by external factors such as current. No matter how fast the drive unit rotates the spray head, the distance the spray head moves along the axis of the part after each revolution remains constant, resulting in a more uniform and stable coating.

[0034] 3. The anti-slip powder coating spraying process of the present invention includes an air guide groove and a sealing ring on the spraying equipment used in conjunction with it to solve the interference problem between the gas supply pipe and the anti-slip powder supply pipe and parts during the spraying process. At the same time, a sleeve is also provided to cover the nozzle and parts to ensure that no molten metal powder splashes onto the human body and causes injury during the spraying process. Furthermore, a guide ring is set inside the sleeve to cooperate with the guide plate to stabilize the rotating ring and the nozzle, further improving the stability of the equipment and the uniformity and stability of the coating produced by the spraying process. Attached Figure Description

[0035] Figure 1 is a three-dimensional structural diagram of the present invention;

[0036] Figure 2 is a top view of the present invention;

[0037] Figure 3 is an exploded view of the present invention;

[0038] Figure 4 is a schematic diagram of the installation structure between the rotating part and the nozzle of the present invention;

[0039] Figure 5 is an enlarged view of A in Figure 4 of this invention;

[0040] Figure 6 is a schematic diagram of the movement of the guide block of the present invention between the guide ring and the guide plate;

[0041] Figure 7 is a schematic diagram of the guide block in Embodiment 2 of the present invention.

[0042] In the diagram: 1. Fixed part; 2. Rotating part; 3. Driving part; 4. Nozzle; 5. End plate; 6. Fixed rod; 7. Rotating ring; 8. Guide plate; 9. Guide piece; 10. Guide block; 11. Sleeve; 12. Guide ring; 13. Air guide groove; 14. Sealing ring; 15. Sealing space; 16. Air guide hole. Detailed Implementation

[0043] Example 1: Shaft-type parts are detachable.

[0044] Referring to Figures 1 to 6, 1. Fixed part; 2. Rotating part; 3. Driving part; 4. Nozzle; 5. End plate; 6. Fixed rod; 7. Rotating ring; 8. Guide plate; 9. Guide piece; 10. Guide block; 11. Sleeve; 12. Guide ring; 13. Air guide groove; 14. Sealing ring; 15. Sealing space; 16. Air guide hole.

[0045] The fixing part 1 is a ring with three screws evenly distributed around its circumference, facing towards the center. Rotating the screws controls the distance from the tip of the screw to the center of the fixing part 1. The rotating part 2 includes two annular steel end plates 5, two steel fixing rods 6, and an ABS plastic rotating ring 7. The two end plates 5 are parallel to the fixing part 1, and their axes coincide with the axis of the ring in the fixing part 1. The two end plates 5 are connected by the two fixing rods 6, which are parallel to each other about the axis of the end plates 5. One end plate 5 is rotatably mounted on the fixing part 1. The rotating ring 7 has two holes with the same diameter as the fixing rods 6, and it slides on the two fixing rods 6 through these holes. The fixing part 1 is also fixed with bolts. A guide plate 8 is parallel to two fixed rods 6. Multiple guide pieces 9 are evenly glued to the guide plate 8. Each guide piece 9 is 2mm thick, and the distance between any two adjacent guide pieces 9 is 10mm. Each guide piece 9 is made of steel and faces the axis of the end plate 5. Each guide piece 9 is parallel to each other, and the multiple guide pieces 9 fill the entire guide plate 8. Each guide piece 9 is inclined at 45° relative to the two end plates 5. The rear end of each guide piece 9 coincides with the front end of the next adjacent guide piece 9 in the projection direction of the axis of the end plate 5. A spherical guide block 10 is embedded in the outer wall of the rotating ring 7. The diameter of the guide block 10 is the same as the distance between two adjacent guide pieces 9. The spherical guide block 10 embedded in the outer wall of the rotating ring 7 can roll. The orientation of the guide pieces 9 is such that when the rotating ring 7 rotates clockwise, it guides the guide ring 12 towards the end plate 5 away from the fixed part 1. However, a sleeve 11 is also fixedly installed on the fixing part 1. The sleeve 11 is concentric with the ring of the fixing part 1. There is a notch on the sleeve 11. The notch and the fixing plate form a complete cylinder. The sleeve 11 is made of steel and has a thickness of 2mm. There are also multiple guide rings 12 inside the sleeve 11 that cooperate with the guide plate 9. The distance between any two adjacent guide rings 12 is the same as the distance between the guide plates 9, which is 10mm. The front end and the rear end of each guide plate 9 are respectively connected to two adjacent guide rings 12.

[0046] An annular air guide groove 13 is provided at the end of the rotating ring 7 away from the fixed part 1. An air guide hole 16 is provided inside the air guide groove 13. The air guide hole 16 is opened on the side wall of the rotating ring 7 and folds out from the inner side wall of the rotating ring 7. The nozzle 4 is fixedly connected to the folded position of the air guide hole 16 and the nozzle 4 faces the center position of the rotating ring 7. A sealing ring 14 is rotatably mounted on the air guide groove 13. The sealing ring 14 is made of steel and is sealed with rubber rings between the sealing ring 14 and the two sides of the air guide groove 13. The sealing ring 14 can rotate relative to the air guide groove 13 concentrically. A sealed space 15 is formed between the sealing ring 14 and the air guide groove 13. The supply pipes of the gas source and the powder source pass through the end plate 5 from the direction away from the fixed part 1 and pass through the sealing ring 14 to communicate with the sealed space 15.

[0047] The drive unit 3 is driven by a stepper motor. The drive unit 3 is fixedly installed on the fixed part 1. Gear teeth are opened on the outer ring of the end plate 5 near the fixed part 1. The motor controls the rotation of the end plate 5 by meshing with the gear teeth on the end plate 5.

[0048] The specific workflow is as follows:

[0049] Before starting work: Rotate the rotating ring 7 counterclockwise to the position closest to the fixed part 1 until it can no longer move. Place the entire equipment horizontally, remove the shaft parts that need to be sprayed, and then insert them horizontally into the rotating part 2 from the center of the ring of the fixed part 1. Then fix the parts to be sprayed with the three screws on the fixed part 1, and make the axis of the parts coincide with the axis of the rotating ring 7.

[0050] During operation: The external gas source and powder source are controlled to simultaneously deliver gas and metal powder into the sealed space 15. After the gas and metal powder enter the sealed space 15, they will enter the air guide hole 16 connected to the sealed space 15 and be sprayed out from the nozzle of the nozzle 4. Then the gas at the nozzle is ignited. When the metal powder is sprayed out from the nozzle of the nozzle 4, it will be heated to the point of melting by the flame and then impact the surface of the part. The molten metal powder will adhere to the surface of the part to form an anti-slip coating.

[0051] At the same time as ignition, the motor power of the drive unit 3 is turned on. The drive unit 3 drives the rotating ring 7 between the end plate 5 and the end plate 5 to rotate clockwise. While the rotating ring 7 is rotating, it also drives the nozzle 4 to rotate around the outer surface of the part. While rotating, the nozzle 4 will spray anti-slip coating on the outer surface of the part. At the beginning of the rotation, the guide block 10 slides between the two guide rings 12 closest to the fixed part 1 along the gap between the two guide rings 12. During the sliding process, the circular guide block 10 also rotates. After it completes one revolution, it passes through the gap between the inclined first and second guide plates 9. Under the action of the guide plates 9, the guide block 10 is guided in the direction away from the end plate 5 of the fixed part 1, and then enters the gap between the second and third guide rings 12 to continue sliding. After it completes another revolution, it enters the gap between the second and third guide plates 9 again and is guided in the direction away from the end plate 5 of the fixed part 1. Then it enters the gap between the third and fourth guide rings 12 to continue sliding, and so on. As the drive part 3 continuously drives the rotating ring 7 to rotate, the rotating ring 7 will continuously move in the direction away from the end plate 5 of the fixed part 1 during the rotation process. The nozzle 4 on the rotating ring 7 will also continuously and automatically adjust the spraying position in the axial direction of the part during the rotational spraying of the part to achieve uniform spraying. During the spraying process, the sleeve 11 will also block the metal powder that splashes out during the spraying process, so as to prevent the heated metal powder from causing harm to the human body.

[0052] During spraying, the rotation direction of the drive unit 3 motor can be controlled to reciprocate the spraying of the parts according to the usage requirements.

[0053] After the work is completed: After the parts are sprayed, the supply of gas and anti-slip powder is cut off. Then, the motor of the drive unit 3 is controlled to reset the rotating ring 7. Finally, the three screws on the fixing part 1 are rotated to remove the parts from the fixing part 1.

[0054] This completes the spraying process of anti-slip powder coating on shaft parts.

[0055] Example 2: The shaft-type parts are vertical and cannot be disassembled.

[0056] Referring to Figure 7, unlike Embodiment 1, the guide blocks 10 on the rotating ring 7 are cylindrical, and there are two of them. The two guide blocks 10 are arranged in the direction of the axis of the rotating ring 7, and the axes of the two cylindrical guide blocks 10 are perpendicular to the axis of the rotating ring 7. The two evenly arranged rotating blocks are inserted into the gaps between two adjacent guide rings 12 in sequence. The cylindrical guide blocks 10 can rotate on the rotating ring 7 along their own axes.

[0057] Insert the device onto the shaft-like part to be sprayed from top to bottom, and then adjust the three screws on the fixing part 1 to adjust the axis of the rotating ring 7 to be coaxial with the part to be sprayed.

[0058] The equipment is then started to spray the parts according to the method in Example 1. When the rotating ring 7 rotates, the two guide blocks 10 are respectively engaged in the gaps between two adjacent guide rings 12 and rotate synchronously. They also pass through the guide plate 9 synchronously. The two guide blocks 10 jointly support the guide ring 12, preventing the guide ring 12 from slipping due to its own weight when moving upward. Functions and implementation processes not described in this example are the same as in Example 1.

[0059] The above two embodiments are merely illustrative examples among the many embodiments of the present invention. Various variations can be made without departing from the principles of the present invention. Embodiments created by those skilled in the art through modifications to the present invention without creative effort are also within the scope of protection of the present invention.

Claims

1. A process for spraying anti-slip metallic powder coating, comprising: S1: Load the anti-slip metal powder into the spraying equipment; S2: Start the spraying equipment and ignite it; S3: Anti-slip metal powder is sprayed onto the surface of shaft parts after being heated and melted by the flame from the nozzle of the spraying equipment to form an anti-slip coating; characterized in that the spraying equipment includes: a fixing part (1) for fixing shaft parts to the equipment; a rotating part (2) provided on the fixing part (1), the rotating part (2) being coaxial with the fixing part (1) and capable of relative rotation with the fixing part (1); a driving part (3) mounted on the fixing part (1) for driving the rotating part (2) to rotate; and a nozzle (4) for flame spraying. The nozzle (4) is mounted on the rotating part (2). The nozzle (4) rotates together with the rotating part (2) and sprays the shaft parts. The nozzle (4) is connected to an external gas source that provides fuel and an external powder source that provides anti-slip metal powder. When the rotating part (2) drives the nozzle (4) to rotate and spray the shaft parts with anti-slip coating, the rotating part (2) will drive the nozzle (4) to move a set unit distance along the axis of the shaft parts by limiting and guiding it after each rotation. The rotating part (2) includes two annular end plates (5). Multiple fixing rods (6) are fixedly installed between the two end plates (5). One of the end plates (5) rotates. A rotating ring (7) is slidably mounted on a fixing part (1) and multiple fixing rods (6). The nozzle (4) is fixedly mounted on the rotating ring (7) and faces the axial direction of the two end plates (5). A guide plate (8) is fixedly mounted on the fixing part (1). The guide plate (8) is parallel to the fixing rods (6). Multiple guide pieces (9) for changing direction are provided on the guide plate (8). Two sides of each guide piece (9) are inclined towards the two end plates (5). The end of each guide plate (8) overlaps with the projection of the starting segment of the next guide plate (8) in the axial direction of the end plate (5). A guide block (10) is provided on the outer side of the rotating ring (7) to cooperate with the guide plate (9). The guide block (10) passes through the gap between the next guide plate (9) under the guidance of the inclined guide plate (9) every time it rotates with the rotating ring (7). A sleeve (11) is provided on the fixing part (1) to cooperate with the guide plate (8). The sleeve (11) is concentric with the end plate (5). The sleeve (11) and the guide plate (8) together form a complete cylinder. A plurality of guide rings (12) are provided inside the sleeve (11) to cooperate with the guide plate (9). Each guide plate (9) is connected to two adjacent guide rings (12) at both ends.

2. The anti-slip metal powder coating spraying process according to claim 1, characterized in that: An annular air guide groove (13) is provided on one end face of the rotating ring (7). A sealing ring (14) is provided above the air guide groove (13). The sealing ring (14) and the air guide groove (13) are mechanically sealed and a sealed space (15) is formed between the air guide groove (13) and the sealing ring (14). Both the external gas source and the powder source are connected to the sealed space (15) by pipes passing through the sealing ring (14). An air guide hole (16) is provided inside the air guide groove (13). The air guide hole (16) is opened along the side wall of the rotating ring (7) and finally folds out from the inner wall of the rotating ring (7) in the direction of the axis of the rotating ring (7). The nozzle (4) is connected to the port of the air guide hole (16) located on the inner wall of the rotating ring (7).

3. The anti-slip metal powder coating spraying process according to claim 2, characterized in that: The air guide hole (16) corresponds one-to-one with the nozzle (4). There are one or more air guide holes (16) and nozzles (4). The air guide holes (16) and nozzles (4) are multiple time-averaged circumferentially distributed on the rotating ring (7).

4. The anti-slip metal powder coating spraying process according to claim 3, characterized in that: There are one or more guide blocks (10). When there are multiple guide blocks (10), they are evenly arranged along the axis of the rotating ring (7). The distance between any two adjacent guide blocks (10) is equal to the distance between two adjacent guide rings (12).

5. The anti-slip metal powder coating spraying process according to claim 4, characterized in that: The guide blocks (10) are all cylindrical, and the axis of the guide block (10) is perpendicular to the axis of the rotating ring (7).

6. The anti-slip metal powder coating spraying process according to claim 4, characterized in that: All guide blocks (10) are spherical.

7. The anti-slip metal powder coating spraying process according to claim 5, characterized in that: Each of the guide blocks (10) can rotate along its own axis after being installed on the rotating ring (7).

8. The anti-slip metal powder coating spraying process according to claim 1, characterized in that: The rotating part (2) and the driving part (3) are connected by gear transmission, chain transmission or worm gear transmission.

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