An intelligent control system and method for screen printing of a glass product surface

Abstract

This invention relates to an intelligent control system for screen printing on glass surfaces, comprising a data communication bus, a main control mechanism, a moving platform, and a squeegee monitoring mechanism. The main control mechanism is located within the main control box of the screen printing machine and establishes data connections with the moving platform, the squeegee monitoring mechanism, and the main control circuit of the screen printing machine via the data communication bus. The moving platform is connected to the conveyor of the screen printing machine. Its operation includes three steps: system assembly, printing control, and printing operation. This invention features a high degree of system integration and modularity, effectively meeting the needs of various screen printing machines. Assembly, operation, and maintenance are convenient and cost-effective. On the one hand, it effectively meets the requirements for surface quality inspection of the glass substrate during printing; on the other hand, it allows for full monitoring and data feedback of the glass printing operation status, thereby improving the quality of screen printing operations.

Description

Technical Field

[0001] This invention relates to an intelligent control system and method for screen printing coating on the surface of glass products, belonging to the field of screen printing technology. Background Technology

[0002] Currently, in screen printing on glass products, the high light transmittance of glass, the demanding surface quality, and the often curved or textured surfaces significantly increase the difficulty of the printing process. While current screen printing machines primarily rely on built-in sensors to detect, identify, and position the glass substrate, this method, while meeting some requirements, lacks effective methods for precise detection and feedback regarding substrate positioning, printing position, squeegee operation, and surface quality. Consequently, screen printing on glass often requires manual assistance or external third-party equipment for positioning and detection, severely impacting the accuracy and efficiency of the process.

[0003] To address this issue, there is an urgent need to develop an intelligent control system and method for screen printing coating on glass surfaces to meet the needs of practical work. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention features a high degree of system integration and modularity, effectively meeting the needs of various screen printing machines. Assembly, operation, and maintenance are convenient and cost-effective. On one hand, it effectively meets the requirements for surface quality inspection of the glass substrate during printing; on the other hand, it enables full monitoring and data feedback of the glass printing process, thereby improving the overall quality of screen printing operations.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A smart control system for screen printing on glass surfaces includes a data communication bus, a main control mechanism, a moving platform, and a squeegee monitoring mechanism. The main control mechanism is located within the main control box of the screen printing machine and establishes data connections with the moving platform, the squeegee monitoring mechanism, and the main control circuit of the screen printing machine via the data communication bus. The moving platform is connected to the conveyor of the screen printing machine and is slidably connected to the screen printing machine via the conveyor. The squeegee monitoring mechanism includes an angle sensor, a pressure sensor, a temperature sensor, a CCD camera, a supplementary light, and a control terminal. The angle sensor is connected to the outer surface of the squeegee of the screen printing machine. Several pressure sensors are included, with at least two pressure sensors evenly distributed along the squeegee axis connecting the squeegee to the squeegee drive mechanism. Additionally, several other pressure sensors connect the screen to the screen printing frame. The screen printing machine is equipped with pressure sensors evenly distributed around the screen printing frame axis, at least two CCD cameras connected to the side of the screen printing frame corresponding to one end of the squeegee, with the optical axis of the CCD camera intersecting the screen surface at an angle of 3°–15°, several supplementary lights connected to the side of the screen printing frame corresponding to the other end of the squeegee and evenly distributed along the screen printing frame axis, with the optical axes of each supplementary light intersecting the screen surface at an angle of 3°–15°, and at least four temperature sensors evenly distributed around the screen printing frame axis, connected to the inner side of the screen printing frame and located above the screen. The tilt sensor, pressure sensor, temperature sensor, CCD camera, and supplementary lights are all electrically connected to the control terminal. The control terminal is connected to the outer side of the screen printing frame and establishes a data connection with the main control mechanism through a data communication bus, and is also electrically connected to the main control circuit of the screen printing machine.

[0007] Furthermore, the mobile stage includes a support base, a horizontal drive rail, a vertical drive rail, sliders, a positioning fixture, a pressure sensor, a stroke sensor, a lifting drive mechanism, a non-contact thickness gauge, a CCD camera, a supplementary light, a bracket, a connecting arm, a flipping mechanism, a detection table, and a control terminal. The support base is a rectangular frame structure and is connected to the conveyor table of the screen printing machine. At least two horizontal drive rails are symmetrically distributed on both sides of the conveyor table axis of the screen printing machine and are parallel to the conveyor table axis. The rear ends of both ends of the horizontal drive rails are slidably connected to a vertical drive rail via sliders, and the axis of the vertical drive rail is perpendicular to the surface of the conveyor table of the screen printing machine. The horizontal drive rails are slidably connected to at least two sliders, each slider being equipped with a stroke sensor. Simultaneously, each slider connected to the front end of the horizontal drive rail is equipped with a lifting drive mechanism coaxially distributed with it. The upper end face of the drive mechanism is connected to the positioning fixture via a pressure sensor. The detection platform is coaxially distributed with the support base and located below the upper end face of the positioning fixture. The detection platform is hinged to the bracket via a flipping mechanism and can rotate within a range of 0°–360° via the flipping mechanism. At the same time, the outer side of the bracket is connected to the lower end face of the slider that is slidably connected to the horizontal drive rail via a connecting arm. The upper end face of the detection platform is equipped with a non-contact thickness gauge coaxially distributed therewith, and the lower end face is equipped with a CCD camera coaxially distributed therewith, as well as several fill lights evenly distributed around the CCD camera. The horizontal drive rail, vertical drive rail, pressure sensor, stroke sensor, lifting drive mechanism, non-contact thickness gauge, CCD camera, fill lights, and flipping mechanism are all connected to the control terminal via a data communication bus. The control terminal is connected to the main control mechanism via a data communication bus and is also electrically connected to the main control circuit of the screen printing machine. The control terminal is connected to the outer side of the support base.

[0008] Furthermore, the lifting drive mechanism is either a lead screw mechanism or a gear and rack structure; the connecting arm is at least a two-stage elastic telescopic rod, and both ends of the connecting arm are respectively hinged to the slider and the outer side of the bracket via elastic hinges; the positioning clamp is an electric suction cup.

[0009] Furthermore, the detection platform is a columnar structure with a rectangular axial cross-section. A reticle marking mechanism is provided on the lower end face of the detection platform, which is coaxially distributed with it. The reticle marking mechanism covers the CCD camera and the fill light, and is slidably connected to the outer side of the detection platform through at least two lifting drive mechanisms.

[0010] Furthermore, the reticle marking mechanism includes a protective sleeve, a reticle plate, and a supplementary light strip. The protective sleeve is a hollow tubular structure coaxially distributed with the detection platform. The lower half of the protective sleeve covers the outside of the detection platform and is slidably connected to the detection platform through a lifting drive mechanism. The reticle plate is embedded in the upper end face of the protective sleeve and is coaxially distributed with the protective sleeve. The supplementary light strip is a closed loop structure coaxially distributed with the reticle plate, covering the outside of the reticle plate and embedded in the inner side of the protective sleeve. The optical axes of each light emitter in the supplementary light strip intersect, and the intersection point is located at the center of the reticle plate. The supplementary light strip and the lifting drive mechanism are electrically connected to the control terminal.

[0011] Furthermore, the control terminal includes an insulated electrical control box, a programmable controller-based control circuit, a communication circuit, a multi-channel regulated power supply, and terminal blocks. The programmable controller-based control circuit, the communication circuit, and the multi-channel regulated power supply are all located inside the electrical control box. The programmable controller-based control circuit is electrically connected to the communication circuit and the multi-channel regulated power supply, respectively. At the same time, the communication circuit and the multi-channel regulated power supply are also electrically connected to the terminal blocks. At least one terminal block is embedded on the outer side of the insulated electrical control box.

[0012] Furthermore, the main control mechanism includes a slide bar, an insulating backplate, connecting columns, a PID controller, a programmable controller-based control circuit, a multi-channel regulated power supply, a drive circuit, and an I / O communication port circuit. The insulating backplate has an H-shaped groove structure in cross-section. The programmable controller-based control circuit, the PID controller, and the multi-channel regulated power supply are each connected to an insulating backplate. The drive circuit and the I / O communication port circuit are distributed on the same insulating backplate, and the insulating backplates are parallel to each other and connected to each other through several connecting columns. The PID controller and the programmable controller-based control circuit are electrically connected to the drive circuit and the multi-channel regulated power supply. At the same time, the drive circuit is also electrically connected to the I / O communication port circuit, which is also connected to the data communication bus and the main control circuit of the screen printing machine.

[0013] A smart control system for screen printing coating on the surface of glass products includes the following steps:

[0014] S1, System Assembly: First, the data communication bus, main control mechanism, moving platform, and squeegee monitoring mechanism are assembled at their designated positions on the screen printing machine and electrically connected to the main control circuit system of the screen printing machine. Data connection is also established to enable the data communication bus, main control mechanism, moving platform, squeegee monitoring mechanism, and screen printing machine to operate synchronously.

[0015] S2, Printing Control: The processed glass substrate to be printed is mounted on the moving stage for positioning. First, the moving stage uses pressure sensors to detect the positioning status of the glass substrate and adjusts the positioning position of the glass substrate to ensure that the detection values ​​of each pressure sensor are consistent. Then, a non-contact thickness gauge is driven to detect the thickness of the glass substrate and store the data. Finally, the printing area of ​​the glass substrate is identified and confirmed by a CCD camera, supplementary light, and a reticle marking mechanism on the detection stage. The position of the glass substrate is adjusted by the coordinated operation of the horizontal and vertical drive rails so that the area of ​​the glass substrate to be printed is located within the set printing operation area.

[0016] S3, Printing Operation: After completing step S2, the adjusted glass substrate is transferred to the printing table of the screen printing machine by the moving stage, where the printing table performs the printing operation. During the printing operation, the squeegee monitoring mechanism first uses a temperature sensor to detect the working temperature of the glass substrate to be printed. Then, the CCD camera and supplementary light are driven to perform a quality inspection on the unprinted surface of the glass substrate. After the quality inspection is completed and the quality is qualified, the screen printing machine is driven to start the printing operation. During the printing operation, the tilt angle of the squeegee is detected by an angle sensor, and the working pressure of the squeegee during the printing operation is detected by a pressure sensor. Finally, after the printing operation is completed, the CCD camera and supplementary light work together to inspect the quality of the printed pattern and the surface quality of the glass substrate. At the same time, the thickness of the printed glass substrate is detected by a non-contact thickness gauge of the moving stage, thereby obtaining the accurate thickness of the coating layer in the printed pattern area. After the inspection is completed, the moving stage transfers the printed glass substrate to the subsequent processing steps.

[0017] The beneficial effects of this invention are as follows:

[0018] This invention features a high degree of system integration and modularity, effectively meeting the needs of various screen printing machines. Assembly, operation, and maintenance are convenient and cost-effective. On one hand, it effectively meets the requirements for surface quality inspection of the glass substrate during printing; on the other hand, it enables full monitoring and data feedback of the glass printing process, thereby improving the overall quality of screen printing operations. Attached Figure Description

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments;

[0020] Figure 1 This is a schematic diagram of the system structure of the present invention;

[0021] Figure 2 A top-view schematic diagram of a partial structure of the scraper monitoring mechanism;

[0022] Figure 3A partial structural schematic diagram of the cross-sectional view of the scraper monitoring mechanism;

[0023] Figure 4 A partial cross-sectional structural diagram of the movable platform;

[0024] Figure 5 A top view of the movable platform structure;

[0025] Figure 6 This is a schematic diagram of a partial structure of the marking mechanism;

[0026] Figure 7 This is a schematic diagram of the control terminal structure;

[0027] Figure 8 This is a schematic diagram of the main control mechanism. Detailed Implementation

[0028] To facilitate the implementation of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific embodiments.

[0029] like Figures 1-8 As shown, an intelligent control system for screen printing on the surface of glass products includes a data communication bus 1, a main control mechanism 2, a moving platform 3, and a squeegee monitoring mechanism 4. The main control mechanism 2 is located in the main control box of the screen printing machine and establishes data connections with the moving platform 3, the squeegee monitoring mechanism 4, and the main control circuit of the screen printing machine through the data communication bus 2. The moving platform 3 is connected to the conveyor of the screen printing machine and is slidably connected to the screen printing machine through the conveyor.

[0030] In this embodiment, the squeegee monitoring mechanism 4 includes an angle sensor 41, a pressure sensor 42, a temperature sensor 43, a CCD camera 44, a supplementary light 45, and a control terminal 46. The angle sensor 41 is connected to the outer side of the squeegee 101 of the screen printing machine. Several pressure sensors 42 are included, with at least two pressure sensors 42 evenly distributed along the squeegee axis connecting the squeegee 101 and the squeegee drive mechanism 102. Simultaneously, several pressure sensors 42 evenly distributed around the screen axis connect the screen 104 and the screen printing frame 103. At least two CCD cameras 44 are connected to the side of the screen printing frame 103 corresponding to one end of the squeegee 101, and the optical axis of the CCD camera 44 intersects the surface of the screen 104 at an angle of 3°. A number of supplementary lights 45 are connected to the side of the screen printing frame 103 corresponding to the other end of the squeegee 101, and are evenly distributed along the axial direction of the screen printing frame 103. The optical axes of each supplementary light 45 intersect the surface of the screen 104 at an angle of 3° to 15°. At least four temperature sensors 43 are evenly distributed around the axis of the screen printing frame 103, connected to the inner side of the screen printing frame 103 and located above the screen 104. The tilt sensor 41, pressure sensor 42, temperature sensor 43, CCD camera 44 and supplementary lights 45 are all electrically connected to the control terminal 46. The control terminal 46 is connected to the outer side of the screen printing frame 103 and establishes a data connection with the main control mechanism 2 through the data communication bus 1. It is also electrically connected to the main control circuit of the screen printing machine.

[0031] It should be noted that the movable platform 3 includes a support base 31, a horizontal drive rail 32, a vertical drive rail 33, a slider 34, a positioning fixture 35, a pressure sensor 42, a stroke sensor 36, a lifting drive mechanism 37, a non-contact thickness gauge 38, a CCD camera 44, a supplementary light 45, a bracket 39, a connecting arm 30, a flipping mechanism 301, a detection table 302, and a control terminal 46. The support base 31 is a rectangular frame structure and is connected to the conveyor table of the screen printing machine. There are at least two horizontal drive rails 32, symmetrically distributed on the screen printing machine. The horizontal drive rail 32 is distributed on both sides of the conveyor table axis and parallel to the conveyor table axis of the screen printing machine. The rear ends of both ends of the horizontal drive rail 32 are slidably connected to a vertical drive rail 33 via sliders 34. The axis of the vertical drive rail 33 is perpendicular to the surface of the conveyor table of the screen printing machine. The horizontal drive rail is slidably connected to at least two sliders 34. Each slider 34 is equipped with a stroke sensor 36. Simultaneously, each slider 34 connected to the front end of the horizontal drive rail 32 is equipped with a lifting drive mechanism 37 coaxially distributed with it. The upper end face is connected to the positioning fixture 35 via a pressure sensor 42. The detection platform 302 is coaxially distributed with the bearing base 31 and located below the upper end face of the positioning fixture 35. The detection platform 302 is hinged to the bracket 39 via a flipping mechanism 301 and can rotate within a range of 0° to 360° via the flipping mechanism 301. At the same time, the outer side of the bracket 39 is connected to the lower end face of the slider 34, which is slidably connected to the horizontal drive guide rail 32 via a connecting arm 30. A non-contact thickness gauge 38 is provided on the upper end face of the detection platform 302 and is coaxially distributed with it, and a CC gauge is provided on the lower end face of the detection platform 302 and is coaxially distributed with it. The system includes a CCD camera 44 and several fill lights 45 evenly distributed around it. The horizontal drive rail 32, vertical drive rail 33, pressure sensor 42, stroke sensor 36, lifting drive mechanism 37, non-contact thickness gauge 38, CCD camera 44, fill lights 45, and flipping mechanism 301 are all connected to the control terminal 46. The control terminal 46 is connected to the main control mechanism 2 via the data communication bus 1 and is also electrically connected to the main control circuit of the screen printing machine. The control terminal 46 is connected to the outer side of the support base 31.

[0032] The flipping mechanism allows for flexible flipping and adjustment of the inspection platform, enabling the switching and adjustment of the non-contact thickness gauge and CCD camera operation.

[0033] In this embodiment, the lifting drive mechanism 37 is either a lead screw mechanism or a gear rack structure; the connecting arm 30 is at least a two-stage elastic telescopic rod, and both ends of the connecting arm 30 are respectively hinged to the outer side of the slider 34 and the bracket 39 via elastic hinges; the positioning clamp 35 is an electric suction cup.

[0034] Meanwhile, the detection platform 302 is a columnar structure with a rectangular axial cross section. A reticle marking mechanism 303 is provided on the lower end face of the detection platform 302 and is coaxially distributed therewith. The reticle marking mechanism 303 covers the CCD camera 44 and the fill light 45 and is slidably connected to the outer side of the detection platform 302 through at least two lifting drive mechanisms 37.

[0035] Specifically, the reticle marking mechanism 303 includes a protective sleeve 3031, a reticle 3032, and a supplementary light strip 3033. The protective sleeve 3031 is a hollow tubular structure coaxially distributed with the detection platform 302. The lower half of the protective sleeve 3031 covers the outside of the detection platform 302 and is slidably connected to the detection platform 302 through a lifting drive mechanism 37. The reticle 3032 is embedded in the upper surface of the protective sleeve 3031 and is coaxially distributed with the protective sleeve 3031. The supplementary light strip 3032 is a closed loop structure coaxially distributed with the reticle 3032, covering the outside of the reticle 3032 and embedded in the inner surface of the protective sleeve 3031. The optical axes of each light emitter in the supplementary light strip 3033 intersect, and the intersection point is located at the center of the reticle 3032. The supplementary light strip 3033 and the lifting drive mechanism 37 are electrically connected to the control terminal 46.

[0036] By using a reticle, the CCD camera can directly obtain the area of ​​the printed region on the glass surface by dividing and measuring the image signal according to a specific array arrangement. This improves the accuracy of the glass substrate positioning for the printing operation and allows for precise measurement of the printing area after the printing operation is completed, thereby improving the accuracy of the printing operation.

[0037] In this embodiment, the control terminal 46 includes an insulated electrical control box 461, a programmable controller-based control circuit 462, a communication circuit 463, a multi-channel regulated power supply 464, and a terminal block 465. The programmable controller-based control circuit 462, the communication circuit 463, and the multi-channel regulated power supply 464 are all located inside the electrical control box 461. The programmable controller-based control circuit 462 is electrically connected to the communication circuit 463 and the multi-channel regulated power supply 464, respectively. At the same time, the communication circuit 463 and the multi-channel regulated power supply 464 are also electrically connected to the terminal block 465. At least one terminal block 465 is embedded on the outer side of the insulated electrical control box 461.

[0038] In this embodiment, the main control mechanism 2 includes a slide bar 21, an insulating back plate 22, connecting columns 23, a PID controller 24, a programmable controller-based control circuit 462, a multi-channel regulated power supply 464, a drive circuit 465, and an I / O communication port circuit 466. The insulating back plate 22 has an H-shaped groove structure in cross-section. The programmable controller-based control circuit 462, the PID controller 24, and the multi-channel regulated power supply 464 are each connected to an insulating back plate 22. The drive circuit 465 and the I / O communication port circuit 466 are distributed on the same insulating back plate 22, and the insulating back plates 22 are distributed in parallel to each other and connected to each other through several connecting columns 23. The PID controller 24 and the programmable controller-based control circuit 462 are both electrically connected to the drive circuit 465 and the multi-channel regulated power supply 464. At the same time, the drive circuit 465 is also electrically connected to the I / O communication port circuit 466. The I / O communication port circuit 466 is also connected to the data communication bus 1 and the main control circuit of the screen printing machine.

[0039] By employing a structure that connects multiple insulating backplates with connecting columns, the integration and modularity of the equipment can be effectively improved, enhancing the convenience and flexibility of circuit system adjustments and component replacement. Simultaneously, the included sliding bars facilitate rapid assembly and positioning of the main control mechanism.

[0040] A smart control system for screen printing coating on the surface of glass products includes the following steps:

[0041] S1, System Assembly: First, the data communication bus, main control mechanism, moving platform, and squeegee monitoring mechanism are assembled at their designated positions on the screen printing machine and electrically connected to the main control circuit system of the screen printing machine. Data connection is also established to enable the data communication bus, main control mechanism, moving platform, squeegee monitoring mechanism, and screen printing machine to operate synchronously.

[0042] S2, Printing Control: The processed glass substrate to be printed is mounted on the moving stage for positioning. First, the moving stage uses pressure sensors to detect the positioning status of the glass substrate and adjusts the positioning position of the glass substrate to ensure that the detection values ​​of each pressure sensor are consistent. Then, a non-contact thickness gauge is driven to detect the thickness of the glass substrate and store the data. Finally, the printing area of ​​the glass substrate is identified and confirmed by a CCD camera, supplementary light, and a reticle marking mechanism on the detection stage. The position of the glass substrate is adjusted by the coordinated operation of the horizontal and vertical drive rails so that the area of ​​the glass substrate to be printed is located within the set printing operation area.

[0043] S3, Printing Operation: After completing step S2, the adjusted glass substrate is transferred to the printing table of the screen printing machine by the moving stage, where the printing table performs the printing operation. During the printing operation, the squeegee monitoring mechanism first uses a temperature sensor to detect the working temperature of the glass substrate to be printed. Then, the CCD camera and supplementary light are driven to perform a quality inspection on the unprinted surface of the glass substrate. After the quality inspection is completed and the quality is qualified, the screen printing machine is driven to start the printing operation. During the printing operation, the tilt angle of the squeegee is detected by an angle sensor, and the working pressure of the squeegee during the printing operation is detected by a pressure sensor. Finally, after the printing operation is completed, the CCD camera and supplementary light work together to inspect the quality of the printed pattern and the surface quality of the glass substrate. At the same time, the thickness of the printed glass substrate is detected by a non-contact thickness gauge of the moving stage, thereby obtaining the accurate thickness of the coating layer in the printed pattern area. After the inspection is completed, the moving stage transfers the printed glass substrate to the subsequent processing steps.

[0044] This invention features a high degree of system integration and modularity, effectively meeting the needs of various screen printing machines. Assembly, operation, and maintenance are convenient and cost-effective. On one hand, it effectively meets the requirements for surface quality inspection of the glass substrate during printing; on the other hand, it allows for full monitoring of the glass printing process, thereby improving the overall quality of screen printing operations.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent control system for screen printing and spraying on the surface of glass products, characterized in that, The intelligent control system for screen printing and spraying on the surface of the glass product includes a data communication bus, a main control mechanism, a moving platform, and a squeegee monitoring mechanism. The main control mechanism is located in the main control box of the screen printing machine and establishes data connections with the moving platform, the squeegee monitoring mechanism, and the main control circuit of the screen printing machine through the data communication bus. The moving platform is connected to the conveyor table of the screen printing machine. The squeegee monitoring mechanism includes a first tilt sensor, a first pressure sensor, a first temperature sensor, a first CCD camera, a first supplementary light, and a first control terminal. The first tilt sensor is connected to the outer side of the squeegee of the screen printing machine. Several first pressure sensors are included, wherein the squeegee and the squeegee driving mechanism are connected by at least two first pressure sensors evenly distributed along the squeegee axis. The screen is connected to the screen printing frame via several first pressure sensors evenly distributed around the screen axis. There are at least two first CCD cameras connected to the side of the screen printing frame corresponding to one end of the squeegee. Several first supplementary lights are connected to the side of the screen printing frame corresponding to the other end of the squeegee. There are at least four first temperature sensors evenly distributed around the screen printing frame axis and connected to the inner side of the screen printing frame. The first tilt sensor, first pressure sensor, first temperature sensor, first CCD camera, and first supplementary light are all electrically connected to the first control terminal. The first control terminal is connected to the outer side of the screen printing frame and establishes a data connection with the main control mechanism through a data communication bus. It is also electrically connected to the main control circuit of the screen printing machine. The mobile platform includes a support base, horizontal drive rails, vertical drive rails, sliders, positioning fixtures, a second pressure sensor, a stroke sensor, a lifting drive mechanism, a non-contact thickness gauge, a second CCD camera, a second supplementary light, a bracket, a connecting arm, a flipping mechanism, a detection table, and a second control terminal. The support base is a rectangular frame structure and is connected to the conveyor table of the screen printing machine. At least two horizontal drive rails are symmetrically distributed on both sides of the conveyor table axis and parallel to it. The rear ends of both ends of the horizontal drive rails are slidably connected to a vertical drive rail via sliders, and the axis of the vertical drive rail is perpendicular to the surface of the conveyor table. The horizontal drive rails are slidably connected to at least two sliders, each slider having a stroke sensor. A lifting drive mechanism coaxially distributed within each slider connected to the front end of the horizontal drive rail is also present. The upper end of the lifting drive mechanism is connected to... The second pressure sensor is connected to the positioning fixture. The detection platform is coaxially distributed with the support base and located below the upper surface of the positioning fixture. The detection platform is hinged to the bracket through a flipping mechanism and can rotate within a range of 0° to 360° through the flipping mechanism. At the same time, the outer side of the bracket is connected to the lower end of the slider that is slidably connected to the horizontal drive rail through a connecting arm. The upper surface of the detection platform is provided with a non-contact thickness gauge coaxially distributed therewith, and the lower end of the detection platform is provided with a second CCD camera coaxially distributed therewith, as well as several second supplementary lights evenly distributed around the second CCD camera. The horizontal drive rail, vertical drive rail, second pressure sensor, stroke sensor, lifting drive mechanism, non-contact thickness gauge, second CCD camera, second supplementary lights, and flipping mechanism are all connected to the second control terminal. The second control terminal is connected to the main control mechanism through a data communication bus and is also electrically connected to the main control circuit of the screen printing machine. The second control terminal is connected to the outer side of the support base.

2. The intelligent control system for screen printing and spraying on the surface of glass products according to claim 1, characterized in that, The lifting drive mechanism is either a lead screw mechanism or a gear and rack structure; the connecting arm is a two-stage elastic telescopic rod, and both ends of the connecting arm are respectively hinged to the slider and the outer side of the bracket through elastic hinges; the positioning clamp is an electric suction cup.

3. The intelligent control system for screen printing and spraying on the surface of glass products according to claim 2, characterized in that, The detection platform is a columnar structure with a rectangular axial cross-section. A reticle marking mechanism is provided on the lower end face of the detection platform, which is coaxially distributed with it. The reticle marking mechanism covers the second CCD camera and the second fill light, and is slidably connected to the outer side of the detection platform through at least two lifting drive mechanisms.

4. The intelligent control system for screen printing and spraying on the surface of glass products according to claim 3, characterized in that, The reticle marking mechanism includes a protective sleeve, a reticle plate, and a supplementary light strip. The protective sleeve is a hollow tubular structure coaxially distributed with the testing platform. The lower half of the protective sleeve covers the outside of the testing platform and is slidably connected to the testing platform through a lifting drive mechanism. The reticle plate is embedded in the upper end face of the protective sleeve and is coaxially distributed with the protective sleeve. The supplementary light strip is a closed loop structure coaxially distributed with the reticle plate, covering the outside of the reticle plate and embedded in the inner side of the protective sleeve. The optical axes of each light emitter in the supplementary light strip intersect, and the intersection point is located at the center of the reticle plate. The supplementary light strip and the lifting drive mechanism are electrically connected to the control terminal.

5. The intelligent control system for screen printing and spraying on the surface of glass products according to claim 4, characterized in that, The first control terminal and the second control terminal include an insulated electrical control box, a programmable logic controller (PLC)-based control circuit, a communication circuit, a multi-channel regulated power supply, and terminal blocks. The PLC-based control circuit, the communication circuit, and the multi-channel regulated power supply are all located inside the electrical control box. The PLC-based control circuit is electrically connected to the communication circuit and the multi-channel regulated power supply, respectively. At the same time, the communication circuit and the multi-channel regulated power supply are also electrically connected to the terminal blocks. At least one terminal block is embedded on the outer side of the insulated electrical control box.

6. The intelligent control system for screen printing and spraying on the surface of glass products according to claim 5, characterized in that, The main control mechanism includes a slider, an insulating backplate, connecting columns, a PID controller, a programmable logic controller (PLC)-based control circuit, a multi-channel regulated power supply, a drive circuit, and an I / O communication port circuit. The insulating backplate has an H-shaped groove structure in cross-section. The PLC-based control circuit, the PID controller, and the multi-channel regulated power supply are each connected to an insulating backplate. The drive circuit and the I / O communication port circuit are distributed on the same insulating backplate, and the insulating backplates are parallel to each other and connected to each other through several connecting columns. The PID controller and the PLC-based control circuit are electrically connected to the drive circuit and the multi-channel regulated power supply. The drive circuit is also electrically connected to the I / O communication port circuit, which is also connected to the data communication bus and the main control circuit of the screen printing machine.

7. The intelligent control system for screen printing and spraying on the surface of glass products according to claim 6, characterized in that, The method of using the intelligent control system for screen printing and spraying on the surface of the glass product includes the following steps: S1, System Assembly: First, the data communication bus, main control mechanism, moving platform, and squeegee monitoring mechanism are assembled at their designated positions on the screen printing machine and electrically connected to the main control circuit system of the screen printing machine. Data connection is also established to enable the data communication bus, main control mechanism, moving platform, squeegee monitoring mechanism, and screen printing machine to operate synchronously. S2, Printing Control: First, the processed glass substrate to be printed is installed on the moving stage for positioning. The moving stage first detects the positioning status of the glass substrate carried by the second pressure sensor and adjusts the positioning position of the glass substrate to make the detection values ​​of the second pressure sensors consistent. Then, a non-contact thickness gauge is driven to detect the thickness of the glass substrate and store the data. Finally, the printing area of ​​the glass substrate is identified and confirmed by the second CCD camera, the second supplementary light and the reticle marking mechanism on the detection stage. The position of the glass substrate is adjusted by the coordinated operation of the horizontal drive rail and the vertical drive rail so that the printing area of ​​the glass substrate is located within the set printing operation area. S3, Printing Operation: After completing step S2, the adjusted glass substrate is transferred to the printing table of the screen printing machine by the moving stage, where the printing table performs the printing operation. During the printing operation, the squeegee monitoring mechanism first detects the working temperature of the glass substrate to be printed using the first temperature sensor. Then, the first CCD camera and the first supplementary light are driven to perform a quality inspection on the unprinted surface of the glass substrate. After the quality inspection is completed and the quality is qualified, the screen printing machine is driven to start the printing operation. During the printing operation, the tilt angle of the squeegee is detected by the first tilt sensor, and the working pressure of the squeegee during the printing operation is detected by the first pressure sensor. Finally, after the printing operation is completed, the first CCD camera and the first supplementary light work together to inspect the quality of the printed pattern and the surface quality of the glass substrate. At the same time, the thickness of the printed glass substrate is detected by the non-contact thickness gauge of the moving stage, thereby obtaining the accurate thickness of the coating layer in the printed pattern area. After the inspection is completed, the moving stage transfers the printed glass substrate to the subsequent processing steps.

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