Antistatic layer multi-point spraying device based on steel plate and control method of antistatic layer multi-point spraying device
Through the combination of the control unit and the multi-stage hydraulic rod system, the displacement and vibration problems of the steel plate during the spraying process are solved, the spraying quality and integrity are ensured, and a stable and efficient steel plate spraying process is achieved.
Patent Information
- Application Number
- CN202510952236.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2025-10-10
AI Technical Summary
During the process of conveying steel plates through the hoisting assembly line for spraying, slight displacement and vibration of the steel plates affect the spraying quality, and the obstruction of the clamping position affects the spraying integrity.
It adopts a control unit and a multi-stage hydraulic rod system, uses electromagnets to adsorb and position the steel plates, combines a buffer mechanism and positioning grippers to ensure the stability of the steel plates, and realizes stable transportation and spraying of the steel plates through a conveyor belt.
It improves the quality and integrity of steel plate spraying, prevents the spraying surface from being scratched, and enhances the stability and efficiency of the spraying process.
Smart Images
Figure CN120755010A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of antistatic layer spraying of steel plates, in particular to a multi-point antistatic layer spraying device based on steel plates and a control method thereof. Background Art
[0002] The multi-point spraying device for antistatic coating of steel plates is a device specially used for uniformly spraying antistatic coating on the surface of steel plates. It uses multiple nozzles to work simultaneously to ensure the uniformity of the coating. Each nozzle can be precisely controlled according to the shape and size of the steel plate, thereby achieving efficient and uniform coating coverage. This device is usually equipped with an automated control system that can automatically adjust the spraying amount and spraying path according to preset parameters to ensure the uniformity and quality stability of the coating. In addition, it also has a real-time monitoring function, which can promptly detect and adjust abnormal conditions in the spraying process, thereby improving production efficiency and coating quality; The existing arrangement is to transport steel plates through a hoisting assembly line and to spray them during the transport process. During the process of spraying the steel plates through the multi-point spraying device, the steel plates undergo slight displacement and vibration, which will affect the quality of the spraying. In addition, during the process of clamping the steel plates to be sprayed, if the clamping grip blocks the spraying position, the integrity of the steel plate spraying will be affected. Therefore, in response to the above problems, an anti-static layer multi-point spraying device based on steel plates and a control method thereof are proposed. Summary of the Invention
[0003] The purpose of the present invention is to provide a multi-point spraying device for an anti-static layer based on a steel plate and a control method thereof, so as to solve the existing setting of transporting the steel plate through a hoisting assembly line and spraying during the transport process. In the process of spraying the steel plate through the multi-point spraying device, the steel plate undergoes slight displacement and vibration, which will affect the quality of the spraying. In the process of clamping the steel plate to be sprayed, if the clamping grip blocks the spraying position, the integrity of the steel plate spraying will be affected.
[0004] To achieve the above object, the present invention provides the following technical solutions: The multi-point spraying device of antistatic layer based on steel plate and its control method include a workbench, wherein both sides of the upper end of the workbench are provided with slide grooves, and a slider is slidably connected inside the slide groove, and a spray shell is welded and fixed on the upper end of the slider, and the spray plate is connected to the spray shell through a linear motor. A stepper motor is installed on the middle side of the workbench, and the top of the stepper motor main shaft is fixedly connected to the rotating shaft, and the outer sides of both ends of the rotating shaft are fixedly connected to elliptical wheels, and a multi-stage hydraulic rod is provided on one side of the elliptical wheel, and a control unit is installed in the middle of the rotating shaft; the control unit includes an electromagnet, and the electromagnet is fixedly connected with a positioning grip around the electromagnet, and the positioning grip on the smallest end is fixedly connected to a vertical rod, and a circular hole is provided on the inner side of the lower end of the vertical rod, and one end of the electromagnet is connected to a vibration damping ring through a buffer mechanism; the multi-stage hydraulic rod includes a main shell, one end of the main shell is fixedly connected to a fixed shell, and a plunger is slidably connected to the inside of the main shell through a second spring, and the other end of the fixed shell is slidably connected to a moving rod through a piston.
[0005] As a further optimization of the present invention, the buffer mechanism includes a guide rod, a first spring is installed on the outside of the guide rod, the guide rod and the first spring correspond one to one, one end of the guide rod is slidably connected to the electromagnet, and the other end of the guide rod is fixedly connected to the vibration damping ring.
[0006] As a further optimization of the present invention, two fixing frames are fixedly connected to the middle upper end of the workbench, and the fixing frames are rotatably connected to the rotating shaft through bearings, and the elliptical wheel is arranged on the side of the fixing frame away from the center point of the workbench.
[0007] As a further optimization of the present invention, there are two elliptical wheels, the elliptical wheels correspond to the multi-stage hydraulic rods one to one, the elliptical wheels are in close contact with the plunger, and the edges of the plunger and the elliptical wheels in close contact are arc-shaped.
[0008] As a further optimization of the present invention, the angle formed between the vertical rod and the rotating shaft is 90°, and the vertical rod is fixed to the rotating shaft through the circular hole by welding.
[0009] As a further optimization of the present invention, two mounting seats are installed on the outside of any multi-stage hydraulic rod, the bottom end of the mounting seat is fixedly connected to the workbench, and the middle end of the mounting seat is fixedly connected to the fixed shell.
[0010] As a further optimization of the present invention, the main shell, fixed shell, movable rod, piston and plunger are on the same axis, the end of the movable rod away from the piston is fixedly connected to the spray shell, and the angle between the movable rod and the spray shell is 90°.
[0011] As a further optimization of the present invention, a feeding hose for feeding the spray plate is fixedly connected in the middle of the spray shell, one end of the feeding hose is connected to the feed port of the spray plate, a plurality of spray heads are provided on the spray plate, and the other end of the feeding hose is connected to the feeding machine.
[0012] As a further optimization of the present invention, a steel plate to be sprayed is placed at the lower end between the control unit and the spray shell, a loading hole for loading the steel plate is opened on the inner side of the workbench, and the loading hole is arranged at the lower end of the steel plate. Two conveyor belts are installed at the upper end of the other side of the workbench, and the surfaces of the two conveyor belts are rough, and the two conveyor belts are parallel to each other.
[0013] As a further optimized content of the present invention, the following steps are included: Step 1: Steel plate loading: The entire equipment is controlled by a controller and powered by an external industrial power supply. After power is turned on, the steel plate is loaded from the lower end of the workbench. When the bottom end of the steel plate placed on the top is flush with the upper end of the workbench, the steel plate loading is completed; Step 2: Control unit picks up the material: A stepper motor with a locking mechanism drives the shaft to rotate, causing the control unit to rotate 90 degrees in the direction of the steel plate. When the control unit rotates to 90 degrees, the electromagnet is energized to work and adsorb the steel plate; During the adsorption process, the inclined slot set at the top of the positioning gripper positions the steel plate, and the buffer mechanism buffers the steel plate during adsorption to avoid instantaneous contact between the steel plate and the electromagnet, which may cause damage. Then the stepper motor drives the control unit and the steel plate to reset; During this process, the rotating shaft drives the elliptical wheel to rotate during its movement. When the elliptical wheel rotates for the first time, it squeezes the plunger. After being squeezed, the plunger squeezes more hydraulic pressure inside the main shell into the fixed shell with a smaller inner diameter, thereby pushing the moving rod to move. During the movement of the moving rod, the moving rod pushes the spray shell to move as a whole to prevent the spray shell from blocking the rotation of the control unit. When the elliptical wheel is reset along with the rotating shaft, the moving rod is reset synchronously to ensure the distance between the steel plate and the spray plate during the spraying process. Step 3: Steel plate spraying: After the control unit is reset, the spray plate is driven by the linear motor to move from one side to the other side inside the spray shell at a constant speed to complete the single-sided spraying of the steel plate. During this process, the dust removal pipeline is connected to the dust removal equipment to process the dust generated during the spraying process; Step 4: Unloading of the steel plate after spraying: After the steel plate is sprayed, the stepper motor drives the control unit to rotate 90 degrees toward the conveyor belt. After the control unit rotates 90 degrees, the electromagnet is powered off and the steel plate flips to the upper end of the conveyor belt. At this time, the conveyor belt drives the steel plate to move and unloading is completed.
[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, a control unit is provided to position the steel plate by electromagnet adsorption during the spraying process, which can prevent the steel plate from slight displacement and vibration during the spraying process, thereby improving the quality of the steel plate after spraying. At the same time, in the process of positioning the steel plate, four positioning grips are used to position the four sides of the steel plate, so that the steel plate and the spraying plate can be aligned. At the same time, in the process of spraying, the steel plate is clamped by magnetic attraction, which can avoid the problem of obstruction of the spraying surface. 2. In the present invention, the multi-stage hydraulic rod can ensure the stability of the steel plate during the clamping process, and at the same time, the steel plate can be loaded from the lower end between the control unit and the spray shell, which can improve the convenience of loading; 3. In the present invention, by setting up two conveyor belts, the other side of the steel plate can be used to unload and transport the steel plate after the steel plate is sprayed, which effectively avoids the problem of the sprayed surface of the steel plate being scratched in the early stage of spraying, affecting the quality of later use. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A in the middle is an enlarged structural diagram; Figure 3 For the present invention Figure 1 The enlarged structural diagram at B in the middle; Figure 4 This is a schematic diagram of the structure of the control unit of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at C in the middle; Figure 6 This is a schematic diagram of the multi-stage hydraulic rod structure of the present invention.
[0016] In the figure: 1. Workbench; 2. Slide; 3. Stepper motor; 4. Control unit; 41. Electromagnet; 42. Positioning gripper; 43. Circular hole; 44. Vibration damping ring; 45. Vertical rod; 46. Buffer mechanism; 461. Guide rod; 462. First spring; 5. Fixed frame; 6. Rotating shaft; 7. Conveyor belt; 8. Mounting base; 9. Multi-stage hydraulic rod; 91. Main housing; 92. Fixed housing; 93. Moving rod; 94. Piston; 95. Second spring; 96. Plunger; 10. Spray shell; 11. Linear motor; 12. Spray plate; 13. Feeding hose; 14. Dust removal duct; 15. Steel plate; 16. Elliptical wheel; 17. Slider. DETAILED DESCRIPTION
[0017] See also Figures 1-6 , the present invention provides a technical solution: The multi-point spraying device of the antistatic layer based on the steel plate and its control method include a workbench 1, a slide groove 2 is opened on both sides of the upper end of the workbench 1, a slider 17 is slidably connected inside the slide groove 2, a spray shell 10 is welded and fixed on the upper end of the slider 17, and a spray plate 12 is connected to the spray shell 10 through a linear motor 11. A stepper motor 3 is installed on one side in the middle of the workbench 1, and the top of the main shaft of the stepper motor 3 is fixedly connected to the rotating shaft 6. The outer sides of the two ends of the rotating shaft 6 are fixedly connected to the elliptical wheel 16. A multi-stage hydraulic rod 9 is provided on one side of the elliptical wheel 16. A control Control unit 4; the control unit 4 includes an electromagnet 41, which is fixedly connected with positioning grabs 42 on all sides, and a vertical rod 45 is fixedly connected to one side of the smallest end positioning grab 42. A circular hole 43 is provided on the inner side of the lower end of the vertical rod 45, and one end of the electromagnet 41 is connected to a vibration damping ring 44 through a buffer mechanism 46; the multi-stage hydraulic rod 9 includes a main shell 91, one end of the main shell 91 is fixedly connected to a fixed shell 92, and a plunger 96 is slidably connected to the inside of the main shell 91 through a second spring 95, and a moving rod 93 is slidably connected to the inner side of the other end of the fixed shell 92 through a piston 94.
[0018] As a further technical solution for implementing this solution, the buffer mechanism 46 includes a guide rod 461, and a first spring 462 is installed on the outer side of the guide rod 461. The guide rod 461 and the first spring 462 correspond to each other one by one. One end of the guide rod 461 is slidably connected to the electromagnet 41, and the other end of the guide rod 461 is fixedly connected to the vibration damping ring 44. Through the above arrangement, the electromagnet 41 can stably buffer the steel plate 15 during its adsorption, and the vibration damping ring 44 can be stably limited. As a further technical solution for implementing this scheme, two fixing brackets 5 are fixedly connected to the middle upper end of the workbench 1. The fixing brackets 5 are rotatably connected to the rotating shaft 6 through bearings, and the elliptical wheel 16 is arranged on the side of the fixing bracket 5 away from the center point of the workbench 1. Through the above arrangement, the stability of the rotating shaft 6 during rotation can be further improved; As a further technical solution for implementing this scheme, two elliptical wheels 16 are provided, and there is a one-to-one correspondence between the elliptical wheels 16 and the multi-stage hydraulic rods 9. The elliptical wheels 16 and the plunger 96 are in close contact with each other, and the edges of the plunger 96 and the elliptical wheel 16 in close contact are arc-shaped. Through the above arrangement, the plunger 96 can be controlled to move stably during the rotation of the elliptical wheel 16. As a further technical solution implemented in this solution, the included angle between the vertical rod 45 and the rotating shaft 6 is 90°, and the vertical rod 45 is welded and fixed to the rotating shaft 6 through the circular hole 43. Through the above arrangement, the stability of the connection between the control unit 4 and the rotating shaft 6 can be further improved; As a further technical solution of this solution, two mounting seats 8 are installed on the outside of any multi-stage hydraulic rod 9, the bottom end of the mounting seat 8 is fixedly connected to the workbench 1, and the middle of the mounting seat 8 is fixedly connected to the fixed shell 92. Through the above arrangement, the multi-stage hydraulic rod 9 arranged on both sides of the upper end of the workbench 1 can be positioned; As a further technical solution of this solution, the main housing 91, the fixed housing 92, the movable rod 93, the piston 94 and the plunger 96 are coaxial, the end of the movable rod 93 away from the piston 94 is fixedly connected to the spray housing 10, and the angle between the movable rod 93 and the spray housing 10 is 90°. Through the above arrangement, the stability and smoothness of the entire equipment during operation are further improved; As a further technical solution of this solution, a feeding hose 13 for feeding the spraying plate 12 is fixedly connected in the middle of the spray shell 10. One end of the feeding hose 13 is connected to the feed port of the spraying plate 12. The spraying plate 12 is provided with multiple spray heads. The other end of the feeding hose 13 is connected to the feeding machine. Through the above arrangement, the steel plate 15 can be sprayed at multiple points to improve the efficiency of the spraying. As a technical solution for further implementation of this solution, a steel plate 15 to be sprayed is placed at the lower end between the control unit 4 and the spray shell 10, and a loading hole for loading the steel plate 15 is opened on the inner side of the workbench 1. The loading hole is set at the lower end of the steel plate 15, and two conveyor belts 7 are installed at the upper end of the other side of the workbench 1. The surface of the two conveyor belts 7 is a rough surface, and the two conveyor belts 7 are parallel to each other. Through the above arrangement, the surface of the steel plate 15 that has not been sprayed can be used to unload the steel plate 15; As a technical solution for further implementation of this plan, the following steps are included: Step 1: Loading the steel plate 15: The entire device is controlled by a controller and powered on by an external industrial power supply. After power is turned on, the steel plate 15 is loaded from the lower end of the workbench 1. When the bottom end of the steel plate 15 placed at the top is flush with the upper end surface of the workbench 1, the loading of the steel plate 15 is completed. Step 2: Control unit 4 picks up the material: the stepper motor 3 with a locking mechanism drives the rotating shaft 6 to rotate, thereby causing the control unit 4 to rotate 90 degrees in the direction of placement of the steel plate 15. When the control unit 4 rotates to 90 degrees, the electromagnet 41 is energized to work and adsorb the steel plate 15; During the adsorption process, the inclined groove provided at the top of the positioning grip 42 positions the steel plate 15, and the buffer mechanism 46 buffers the steel plate 15 during adsorption to prevent the steel plate 15 from instantaneously contacting the electromagnet 41 and causing damage. Then, the stepper motor 3 drives the control unit 4 and the steel plate 15 to reset. During this process, the rotating shaft 6 drives the elliptical wheel 16 to rotate during its movement. When the elliptical wheel 16 rotates for the first time, it squeezes the plunger 96. After being squeezed, the plunger 96 squeezes more hydraulic pressure inside the main shell 91 into the fixed shell 92 with a smaller inner diameter, thereby pushing the moving rod 93 to move. During the movement, the moving rod 93 pushes the spray shell 10 to move as a whole, so as to prevent the spray shell 10 from obstructing the rotation of the control unit 4. When the elliptical wheel 16 is reset along with the rotating shaft 6, the moving rod 93 is reset synchronously to ensure the spacing between the steel plate 15 and the spray plate 12 during the spraying process. Step 3: Spraying the steel plate 15: After the control unit 4 is reset, the spraying plate 12 is driven by the linear motor 11 to move from one side to the other side inside the spraying shell 10 at a constant speed to complete the single-side spraying of the steel plate 15. During this process, the dust removal pipe 14 is connected to the dust removal equipment to process the dust generated during the spraying process. Step 4: Unloading of the sprayed steel plate 15: After the steel plate 15 is sprayed, the stepper motor 3 drives the control unit 4 to rotate 90° toward the conveyor belt 7. After the control unit 4 rotates 90°, the electromagnet 41 is powered off, and the steel plate 15 flips to the upper end of the conveyor belt 7. At this time, the conveyor belt 7 drives the steel plate 15 to move and unloading is completed.
[0019] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method of the present invention and its core ideas. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.
Claims
1. A multi-point spraying device for an antistatic layer on a steel plate, comprising a workbench (1), characterized in that: Both sides of the upper end of the workbench (1) are provided with a slide groove (2), a slider (17) is slidably connected inside the slide groove (2), a spray shell (10) is welded and fixed to the upper end of the slider (17), and a spray plate (12) is connected to the inside of the spray shell (10) via a linear motor (11), a stepper motor (3) is installed on one side in the middle of the workbench (1), the top end of the main shaft of the stepper motor (3) is fixedly connected to a rotating shaft (6), and the outer sides of both ends of the rotating shaft (6) are fixedly connected to an elliptical wheel (16), a multi-stage hydraulic rod (9) is provided on one side of the elliptical wheel (16), and a control unit (4) is installed in the middle of the rotating shaft (6); The control unit (4) includes an electromagnet (41), and the electromagnet (41) is fixedly connected to positioning grips (42) on all sides. A vertical rod (45) is fixedly connected to one side of the positioning grip (42) at the smallest end. A circular hole (43) is provided on the inner side of the lower end of the vertical rod (45). One end of the electromagnet (41) is connected to a vibration damping ring (44) via a buffer mechanism (46). The multi-stage hydraulic rod (9) comprises a main housing (91), one end of the main housing (91) is fixedly connected to a fixed housing (92), a plunger (96) is slidably connected inside the main housing (91) via a second spring (95), and the other end of the fixed housing (92) is slidably connected to a moving rod (93) inside the fixed housing (92) via a piston (94).
2. The multi-point spraying device for antistatic layer based on steel plate according to claim 1 is characterized in that: The buffer mechanism (46) includes a guide rod (461), a first spring (462) is installed on the outside of the guide rod (461), the guide rod (461) and the first spring (462) are in one-to-one correspondence, one end of the guide rod (461) is slidably connected to the electromagnet (41), and the other end of the guide rod (461) is fixedly connected to the vibration damping ring (44).
3. The multi-point spraying device for antistatic layer based on steel plate according to claim 1, characterized in that: Two fixing frames (5) are fixedly connected to the middle upper end of the workbench (1), and the fixing frames (5) are rotatably connected to the rotating shaft (6) through bearings, and the elliptical wheel (16) is arranged on a side of the fixing frame (5) away from the center point of the workbench (1).
4. The multi-point spraying device for antistatic layer based on steel plate according to claim 1, characterized in that: Two elliptical wheels (16) are provided, and the elliptical wheels (16) and the multi-stage hydraulic rods (9) correspond one to one. The elliptical wheels (16) and the plunger (96) are in close contact with each other, and the edges of the plunger (96) and the elliptical wheels (16) in close contact are arc-shaped.
5. The multi-point spraying device for antistatic layer based on steel plate according to claim 1, characterized in that: The included angle between the vertical rod (45) and the rotating shaft (6) is 90°, and the vertical rod (45) is fixed to the rotating shaft (6) by welding through the circular hole (43).
6. The multi-point spraying device for antistatic layer based on steel plate according to claim 1, characterized in that: Two mounting seats (8) are installed on the outside of any multi-stage hydraulic rod (9), the bottom end of the mounting seat (8) is fixedly connected to the workbench (1), and the middle end of the mounting seat (8) is fixedly connected to the fixed shell (92).
7. The multi-point spraying device for antistatic layer based on steel plate according to claim 1, characterized in that: The main housing (91), the fixed housing (92), the movable rod (93), the piston (94) and the plunger (96) are coaxial, and the end of the movable rod (93) away from the piston (94) is fixedly connected to the spray housing (10), and the angle formed between the movable rod (93) and the spray housing (10) is 90°.
8. The multi-point spraying device for antistatic layer based on steel plate according to claim 1, characterized in that: A feeding hose (13) for feeding the spray plate (12) is fixedly connected in the middle of the spray shell (10), one end of the feeding hose (13) is connected to the feed port of the spray plate (12), a plurality of spray heads are provided on the spray plate (12), and the other end of the feeding hose (13) is connected to a feeding machine.
9. The multi-point spraying device for antistatic layer based on steel plate according to claim 1, characterized in that: A steel plate (15) to be sprayed is placed at the lower end between the control unit (4) and the spray shell (10), and a loading hole for loading the steel plate (15) is opened on the inner side of the workbench (1), and the loading hole is set at the lower end of the steel plate (15). Two conveyor belts (7) are installed at the upper end of the other side of the workbench (1), and the surfaces of the two conveyor belts (7) are rough. The two conveyor belts (7) are parallel to each other.
10. The control method of the multi-point spraying device for antistatic layer based on steel plate according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Loading the steel plate (15): The entire device is controlled by a controller and powered on by an external industrial power supply. After power is turned on, the steel plate (15) is loaded from the lower end of the workbench (1). When the bottom end of the steel plate (15) placed at the uppermost end is flush with the upper end surface of the workbench (1), the loading of the steel plate (15) is completed. Step 2: The control unit (4) takes the material: the stepper motor (3) with a locking mechanism drives the rotating shaft (6) to rotate, thereby causing the control unit (4) to rotate 90 degrees in the direction of placement of the steel plate (15). When the control unit (4) rotates to 90 degrees, the electromagnet (41) is energized to work and adsorb the steel plate (15); During the adsorption process, the inclined groove provided at the top of the positioning grip (42) positions the steel plate (15), and the buffer mechanism (46) buffers the steel plate (15) during adsorption to prevent the steel plate (15) from instantaneously contacting the electromagnet (41) and causing damage. Then, the stepper motor (3) drives the control unit (4) and the steel plate (15) to reset. During this process, the rotating shaft (6) drives the elliptical wheel (16) to rotate during the movement. When the elliptical wheel (16) rotates for the first time, it squeezes the plunger (96). After being squeezed, the plunger (96) squeezes more hydraulic pressure inside the main shell (91) into the fixed shell (92) with a smaller inner diameter, thereby pushing the moving rod (93) to move. During the movement, the moving rod (93) pushes the spray shell (10) to move as a whole, so as to prevent the spray shell (10) from blocking the rotation of the control unit (4). During the process of the elliptical wheel (16) resetting with the rotating shaft (6), the moving rod (93) is reset synchronously, so as to ensure the spacing between the steel plate (15) and the spray plate (12) during the spraying process. Step 3: spraying the steel plate (15): after the control unit (4) is reset, the spraying plate (12) is driven by the linear motor (11) to move from one side to the other side at a constant speed inside the spraying shell (10) to complete the single-side spraying of the steel plate (15). During this process, the dust removal pipe (14) is connected to the dust removal equipment to process the dust generated during the spraying process; Step 4: Unloading the sprayed steel plate (15): After the steel plate (15) is sprayed, the stepper motor (3) drives the control unit (4) to rotate 90 degrees in the direction of the conveyor belt (7). After the control unit (4) rotates 90 degrees, the electromagnet (41) is powered off, and the steel plate (15) is turned over to the upper end of the conveyor belt (7). At this time, the conveyor belt (7) drives the steel plate (15) to move, and unloading is completed.