A visual inspection device for a wire mesh

Abstract

The present invention relates to the technical field of detection equipment, specifically a visual detection equipment for silk screens, which includes a frame assembly. The frame assembly includes a bottom plate and a cover plate. A rotating assembly is installed at the bottom of the cover plate. The rotating assembly includes three rotating plates, and clamps are respectively installed on the inner sides of each rotating plate. The clamp includes a bracket, and a rotating assembly is installed at the top of each bracket. The rotating assembly is assembled to be clamped in the groove at the bottom of the telescopic rod through two hemispheres on the outside of the telescopic rod, and the power of the telescopic movement of the telescopic rod is converted into the power for the rotating assembly to drive the clamp to rotate by slidingly connecting the two hemispheres to two threaded grooves. The clamp is assembled to clamp the silk screen plate, and cooperate with the rotating assembly to drive the silk screen plate to rotate reciprocally by 180°. The limiting assembly limits the rotation of the clamp during the movement. Four air nozzles and a blower extract the etched broken wire filaments from the inside of the side plate, thereby avoiding misjudgment by the processor.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and specifically relates to a visual detection equipment for silk screens. Background Art

[0002] A visual detection equipment is capable of quickly and accurately detecting various defects (holes, defects, stains, etc.) of a silk screen, ensuring that the quality of the silk screen meets the requirements, enabling automated detection, greatly reducing the time and workload of manual detection. By promptly detecting unqualified silk screens, it avoids waste and losses caused by using defective products in subsequent production processes, reduces production costs, can provide objective and consistent detection results, avoids subjective errors that may occur in manual detection, collects and analyzes detection data, helps to understand problems and trends in the silk screen production process, provides a basis for improving production processes, ensures the quality of silk screens, helps to produce higher-quality products, and enhances the competitiveness of enterprises in the market.

[0003] Most of the existing technologies perform single-sided multi-angle detection on the silk screen stencil. The first industrial camera and the second industrial camera are fixed on the support block, and the support block makes a reciprocating swing of 60 degrees with the intermittent rotation of the rotating frame, so that the shooting directions of the first industrial camera and the second industrial camera are alternately perpendicular to the surface of the second lamp board.

[0004] The Chinese patent application with the publication number CN117347376A discloses a silk screen cleanliness detection equipment for a silk printing machine. This invention mainly solves the problem that the existing device can only detect one angle of the silk screen stencil, resulting in inaccurate detection results.

[0005] Therefore, there is a need for a visual detection equipment for silk screens to solve the problems in the existing technologies, such as only being able to detect one side of the silk screen stencil, not considering how to detect defects on the other side of the silk screen stencil. Even if it is necessary to detect defects on the other side of the silk screen stencil, manual or mechanical equipment is required to cooperate for turning over and feeding for detection again, which is not conducive to improving the detection efficiency and increases the detection cost. The existing detection equipment does not consider cleaning the silk screen stencil before detection, which easily causes the broken etched wire on the silk screen surface to be adsorbed on the silk screen stencil, resulting in misjudgment by the processor and affecting the detection results. Summary of the Invention

[0006] Aiming at the problems in the above-mentioned existing technologies, such as most detection equipment can only detect defects on one side of the silk screen stencil, and the broken etched wire is adsorbed on the silk screen stencil, resulting in misjudgment by the processor, etc., this application provides a visual detection equipment for silk screens.

[0007] The technical solution of the present invention is as follows:

[0008] A visual inspection device for a wire mesh, comprising a frame assembly. The frame assembly includes a bottom plate and a cover plate. A rotating assembly is installed at the bottom of the cover plate. The rotating assembly includes three rotating plates. A detection assembly is installed at the top of the bottom plate. The detection assembly includes a camera. A purging assembly is installed at the top of the bottom plate. A blanking assembly is installed at the bottom of the bottom plate. Clamps are respectively installed inside each rotating plate. The clamp includes a bracket. A rotating assembly is installed at the top of each bracket. The rotating assembly includes a groove. Limiting assemblies are respectively installed on the outer sides of the rotating assemblies. A boosting assembly is installed at the bottom of the cover plate. The boosting assembly includes a telescopic rod and a hemisphere;

[0009] The rotating assembly is assembled to be clamped inside the groove at the bottom of the telescopic rod by fitting two hemispheres on the outer side of the telescopic rod, and the power of the telescopic movement of the telescopic rod is converted into the power for the rotating assembly to drive the clamp to rotate by slidingly connecting the two hemispheres to two threaded grooves;

[0010] The clamp is assembled to clamp the wire mesh plate and cooperate with the rotating assembly to drive the wire mesh plate to rotate reciprocally by 180°.

[0011] Specifically, a base is installed at the bottom of the bottom plate. Side plates are installed on the outer sides of the bottom plate. A feeding port is penetrated and opened on the outer side of the side plates. A lamp barrel is installed on the outer side of the side plates, and the lamp barrel is communicated with the side plates. A cover plate is installed at the top of the side plates.

[0012] Specifically, a stepping motor is installed at the bottom of the cover plate. Three rotating plates are installed on the outer side of the output end of the stepping motor. Two circular grooves are respectively opened at the tops of the three rotating plates.

[0013] Specifically, a cylinder is fixed inside the bracket. A double-headed column is installed at the bottom of the telescopic end of the cylinder. Two guide plates are rotatably connected to the outer side of the double-headed column. Two positive columns are rotatably installed inside the two guide plates. Clamping plates are installed at the opposite ends of the two positive columns. Side rods are respectively rotatably sleeved on the outer sides of the two clamping plates, and the other ends of the two side rods are respectively welded to the outer sides of the brackets. Molds are respectively detachably installed on the outer sides of the two clamping plates.

[0014] Specifically, the telescopic rod is installed at the bottom of the cover plate, and the telescopic rod is located on the left side of the stepping motor. Two hemispheres are installed on the outer side of the telescopic end of the telescopic rod. A guide post is installed at the top of each bracket. Two threaded grooves are opened inside each guide post. A groove is penetrated and opened on the outer side of each guide post, and the two hemispheres are located inside the groove close to the lamp barrel.

[0015] Specifically, the limiting assembly is assembled to squeeze the block inside the circular groove through the spring inside the side column. The bottom of the block 52 is hemispherical, thereby restricting the rotation of the clamp during movement;

[0016] Before the rotating assembly flips the fixture, a clamping block is installed at the top of the bottom wall of the side column through a spring, and the clamping block is located inside the circular groove away from the stepping motor;

[0017] When the rotating assembly flips the fixture, the clamping block squeezes the spring and moves into the inside of the side column. At this time, the clamping block is disengaged from the circular groove, so the side column can drive the clamping block to move on the top of the rotating plate;

[0018] After the rotating assembly flips the fixture by 180 degrees, the clamping block is located inside the circular groove close to the stepping motor.

[0019] Specifically, a support rod is installed on the side of the camera away from the lamp barrel, and the bottom of the support rod is welded to the top of the bottom plate. A lamp box is installed inside the lamp barrel, and two supplementary light lamps are installed inside the lamp box.

[0020] Specifically, the purging assembly includes a column plate and a blower. Four air nozzles are installed on the side of the column plate close to the lamp box. The blower is installed outside the side plate and is located in front of the lamp barrel.

[0021] Specifically, the blanking assembly includes a first blanking plate and a second blanking plate. The first blanking plate is located on the left side of the base, and the second blanking plate is located on the back of the base. A qualified hole is penetrated through the bottom of the bottom plate, and the inside of the qualified hole is communicated with the inside of the second blanking plate. A defective hole is penetrated through the bottom of the bottom plate, and the inside of the defective hole is communicated with the inside of the first blanking plate.

[0022] Specifically, the stepping motor, the air nozzle, the camera, the telescopic rod, and the cylinder are all electrically connected to the processor.

[0023] The beneficial effects of the present invention are as follows:

[0024] (1) For the visual inspection device for wire mesh of the present invention, the processor controls the telescopic rod to extend. The telescopic end of the telescopic rod drives the two hemispheres to move towards the side close to the wire mesh plate. The two hemispheres drive the guide column to rotate clockwise by 180° through the thread groove. The guide column drives the side column to rotate clockwise. The side column drives the clamping block to move through the spring. The clamping block squeezes the spring under the reaction force of the bracket and moves out from the inside of the circular groove away from the stepping motor and then moves into the inside of the side column, releasing the restriction on the fixture. The guide column drives the fixture to rotate clockwise by 180°. The fixture drives the wire mesh plate to rotate clockwise by 180°. The clamping block moves out from the inside of the side column under the elastic force of the spring and then moves into the inside of the circular groove close to the stepping motor, thereby restricting the rotation of the fixture during movement, avoiding the hemispheres being unable to enter the grooves, and further turning over the wire mesh plate to achieve the purpose of double-sided inspection of the wire mesh plate.

[0025] (2) The visual inspection device for a wire mesh described in the present invention adopts a purging component. The processor activates four jet nozzles, and the four jet nozzles blow and clean the side of the wire mesh stencil close to the camera. During the process of flipping the wire mesh stencil, the four jet nozzles purge the wire mesh stencil at various angles to remove the etched and broken wire filaments. The blower continuously sucks the etched and broken wire filaments out of the inner side, thereby avoiding misjudgment by the processor caused by the etched and broken wire filaments and improving the detection efficiency.

[0026] (3) The visual inspection device for a wire mesh described in the present invention adopts a fixture, and the mold is moved through the expansion and contraction of the cylinder, which facilitates the tightening and releasing of the wire mesh stencil and provides convenience for loading and unloading.

[0027] (4) The visual inspection device for a wire mesh described in the present invention adopts a detachable mold. The staff can disassemble the mold for replacement by using a wrench, which facilitates the inspection of wire mesh stencils with different thicknesses and improves the practicability of this inspection device. Brief Description of the Drawings

[0028] The present invention will be further described below in conjunction with the drawings and embodiments.

[0029] Figure 1 It is a schematic diagram of the overall structure of a visual inspection device for a wire mesh provided by the present invention;

[0030] Figure 2 It is a schematic diagram of the back structure of a visual inspection device for a wire mesh provided by the present invention;

[0031] Figure 3 It is a schematic diagram of the internal structure of a visual inspection device for a wire mesh provided by the present invention;

[0032] Figure 4 It is a schematic sectional view of a visual inspection device for a wire mesh provided by the present invention;

[0033] Figure 5 It is a schematic diagram of the rotating plate structure of a visual inspection device for a wire mesh provided by the present invention;

[0034] Figure 6 It is a schematic diagram of the fixture structure of a visual inspection device for a wire mesh provided by the present invention;

[0035] Figure 7 It is a schematic top view of the bracket of a visual inspection device for a wire mesh provided by the present invention;

[0036] Figure 8 It is a schematic sectional view of the frame assembly of a visual inspection device for a wire mesh provided by the present invention;

[0037] Figure 9 For Figure 6Enlarged view of location A;

[0038] Figure 10 is Figure 7 Enlarged view of location B;

[0039] Figure 11 is Figure 8 Enlarged view of location C.

[0040] In the figure: 1, frame assembly; 11, base; 12, bottom plate; 13, side plate; 14, lamp barrel; 15, cover plate; 2, rotating assembly; 21, stepper motor; 22, rotating plate; 23, circular groove; 3, fixture; 31, bracket; 32, cylinder; 33, side rod; 34, clamping plate; 35, guide plate; 36, positive column; 37, back column; 38, mold; 4, rotating assembly; 41, guide post; 42, threaded groove; 43, groove; 5, limiting assembly; 51, side post; 52, block; 6, detection assembly; 61, support rod; 62, camera; 63, light box; 64, supplementary light; 7, purging assembly; 71, column plate; 72, air nozzle; 73, fan; 8, blanking assembly; 81, defective hole; 82, qualified hole; 83, first blanking plate; 84, second blanking plate; 9, assisting assembly; 91, telescopic rod; 92, hemisphere. Detailed implementation mode

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the present invention in combination with the drawings and the descriptions of the embodiments or the prior art. Obviously, the following descriptions of the structures of the drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. It should be noted here that the descriptions of these embodiment modes are used to help understand the present invention, but do not constitute a limitation to the present invention.

[0042] Embodiment 1:

[0043] As Figure 1-11As shown in the figure, an embodiment of the present invention provides a visual inspection device for a wire mesh, including a frame assembly 1. The frame assembly 1 includes a bottom plate 12 and a cover plate 15. A rotating assembly 2 is installed at the bottom of the cover plate 15. The rotating assembly 2 includes three rotating plates 22. A detection assembly 6 is installed at the top of the bottom plate 12. The detection assembly 6 includes a camera 62. A purging assembly 7 is installed at the top of the bottom plate 12. A blanking assembly 8 is installed at the bottom of the bottom plate 12. A fixture 3 is installed inside each rotating plate 22. The fixture 3 includes a bracket 31. A rotating assembly 4 is installed at the top of each bracket 31. The rotating assembly 4 includes a groove 43. A limiting assembly 5 is installed on the outside of the rotating assembly 4. An assisting assembly 9 is installed at the bottom of the cover plate 15. The assisting assembly 9 includes a telescopic rod 91 and a hemisphere 92. The rotating assembly 4 is assembled to be clamped inside the groove 43 at the bottom of the telescopic rod 91 by cooperating with two hemispheres 92 outside the telescopic rod 91. The power of the telescopic movement of the telescopic rod 91 is converted into the power for the rotating assembly 4 to drive the fixture 3 to rotate by sliding the two hemispheres 92 in two threaded grooves 42. The fixture 3 is assembled to clamp the wire mesh plate, and cooperates with the rotating assembly 4 to drive the wire mesh plate to rotate reciprocally by 180°.

[0044] Specifically, a base 11 is installed at the bottom of the bottom plate 12. Side plates 13 are installed on the outside of the bottom plate 12. A feeding port is formed through the outside of the side plates 13. A lamp barrel 14 is installed on the outside of the side plates 13, and the lamp barrel 14 communicates with the side plates 13. A cover plate 15 is installed at the top of the side plates 13.

[0045] In this embodiment, the base 11 can provide stable support for the bottom plate 12 under the support of the ground, and further provide support for the entire frame assembly 1, so that the entire detection device is stably supported, preparing for subsequent detection.

[0046] Specifically, a stepping motor 21 is installed at the bottom of the cover plate 15. Three rotating plates 22 are installed on the outside of the output end of the stepping motor 21. Two circular grooves 23 are respectively formed at the tops of the three rotating plates 22.

[0047] In this embodiment, the processor controls the stepping motor 21 to rotate 120° each time. The output end of the stepping motor 21 drives the three fixtures 3 to rotate clockwise by 120° with the stepping motor 21 as the center through the rotating plates 22. The fixture 3 equipped with the wire mesh plate drives the wire mesh plate to move to the side opposite to the supplementary light 64 and the camera 62 for detection or to the top of the qualified port, achieving the purpose of driving the wire mesh plate for detection.

[0048] Specifically, a cylinder 32 is fixed inside the bracket 31. A double-headed column is installed at the bottom of the telescopic end of the cylinder 32. Two guide plates 35 are rotatably connected to the outside of the double-headed column. Two positive columns 36 are rotatably installed on the inner sides of the two guide plates 35. Clamping plates 34 are installed at the opposite ends of the two positive columns 36. Side rods 33 are respectively sleeved on the outer sides of the two clamping plates 34, and the other ends of the two side rods 33 are respectively welded to the outside of the bracket 31. Molds 38 are respectively detachably installed on the outer sides of the two clamping plates 34.

[0049] In this embodiment, when the processor controls the cylinder 32 near the feeding port to contract, the telescopic end of the cylinder 32 retracts upward, driving the double-headed column upward. The double-headed column synchronously drives the rotatably connected guide plates 35 to move upward. Since the other end of the guide plate 35 is rotatably connected to the clamping plate 34 through the positive column 36, and the inclined end of the clamping plate 34 penetrates through the side rod 33, when the guide plate 35 moves upward at this time, it pushes the inclined end of the clamping plate 34 to continue to penetrate through the side rod 33 upward. At the same time, the vertical ends of the clamping plates 34 move away from each other. At the same time, the two clamping plates 34 drive the two molds 38 to separate. The staff places the silk screen plate on the opposite side of the two molds 38 by hand. Then the processor controls the cylinder 32 near the feeding port to extend, driving the double-headed column downward. The double-headed column synchronously drives the rotatably connected guide plates 35 to move downward. Since the other end of the guide plate 35 is rotatably connected to the clamping plate 34 through the positive column 36, and the inclined end of the clamping plate 34 penetrates through the side rod 33, when the guide plate 35 moves downward at this time, it pulls the inclined end of the clamping plate 34 to continue to penetrate through the side rod 33 downward. At the same time, the vertical ends of the clamping plates 34 approach each other. The two clamping plates 34 drive the two molds 38 to approach each other. The two molds 38 fix the silk screen plate inside the two molds 38, completing the feeding.

[0050] The processor controls the cylinder 32 of the fixture 3 equipped with the silk screen plate to contract. The telescopic end of the cylinder 32 retracts upward, driving the double-headed column upward. The double-headed column synchronously drives the rotatably connected guide plates 35 to move upward. Since the other end of the guide plate 35 is rotatably connected to the clamping plate 34 through the positive column 36, and the inclined end of the clamping plate 34 penetrates through the side rod 33, when the guide plate 35 moves upward at this time, it pushes the inclined end of the clamping plate 34 to continue to penetrate through the side rod 33 upward. At the same time, the vertical ends of the clamping plates 34 move away from each other. The two clamping plates 34 drive the two molds 38 to move away from each other, releasing the restriction on the silk screen plate. The unqualified silk screen plate under the action of gravity penetrates through the inside of the defective hole 81 or the qualified hole 82 and moves to the inside of the first blanking plate 83 or the second blanking plate 84, completing the blanking.

[0051] The staff replaces the mold 38 by using a wrench, which is convenient for detecting silk screen plates of different thicknesses and improves the practicability of this detection device.

[0052] Specifically, the telescopic rod 91 is installed at the bottom of the cover plate 15, and the telescopic rod 91 is located on the left side of the stepping motor 21. Two hemispheres 92 are installed on the outer side of the telescopic end of the telescopic rod 91. A guide post 41 is installed at the top of each bracket 31. Two threaded grooves 42 are provided inside each guide post 41. A groove 43 is provided through the outer side of each guide post 41, and the two hemispheres 92 are located inside the groove 43 close to the lamp barrel 14.

[0053] Specifically, the limiting component 5 is assembled to squeeze the clamping block 52 inside the circular groove 23 through the spring inside the side post 51. The bottom of the clamping block 52 is hemispherical, thereby restricting the rotation of the fixture 3 during movement.

[0054] Before the rotating component 4 flips the fixture 3, the clamping block 52 is installed on the top of the bottom wall of the side post 51 through a spring, and the clamping block 52 is located inside the circular groove 23 far from the stepping motor 21.

[0055] When the rotating component 4 flips the fixture 3, the clamping block 52 squeezes the spring and moves into the side post 51. At this time, the clamping block 52 is separated from the circular groove 23, so the side post 51 can drive the clamping block 52 to move on the top of the rotating plate 22.

[0056] After the rotating component 4 flips the fixture 3 by 180 degrees, the clamping block 52 is located inside the circular groove 23 close to the stepping motor 21.

[0057] In this embodiment, the processor controls the telescopic rod 91 to extend. The telescopic end of the telescopic rod 91 drives the two hemispheres 92 to move toward the side close to the screen printing plate. The two hemispheres 92 drive the guide post 41 to rotate clockwise by 180° through the threaded groove 42. The guide post 41 drives the side post 51 to rotate clockwise. The side post 51 drives the clamping block 52 to move through the spring. The clamping block 52 squeezes the spring under the reaction force of the bracket 31 and moves out of the circular groove 23 far from the stepping motor 21 and then into the side post 51. At this time, the clamping block 52 is separated from the circular groove 23, releasing the restriction on the fixture 3. At this time, the guide post 41 can drive the fixture 3 to rotate. When the guide post 41 drives the fixture 3 to rotate clockwise by 180°, at this time, the fixture 3 drives the screen printing plate to rotate clockwise by 180° synchronously. At this time, the clamping block 52 corresponds to the position of the circular groove 23 on the other side. The clamping block 52 moves into the circular groove 23 under the elastic force of the spring, thereby restricting the rotation of the fixture 3 during movement, and then turning over the screen printing plate to achieve the purpose of double-sided inspection of the screen printing plate.

[0058] Specifically, a support rod 61 is installed on the side of the camera 62 far from the lamp barrel 14, and the bottom of the support rod 61 is welded to the top of the bottom plate 12. A lamp box 63 is installed inside the lamp barrel 14, and two supplementary light lamps 64 are installed inside the lamp box 63.

[0059] In this embodiment, two fill light lamps 64 are turned on, the camera 62 takes pictures of both sides of the screen and transmits the captured data to the processor, and the processor detects and determines the screen.

[0060] Specifically, the purging assembly 7 includes a column plate 71 and a blower 73. Four air nozzles 72 are installed on one side of the column plate 71 close to the light box 63. The blower 73 is installed outside the side plate 13, and the blower 73 is located in front of the lamp barrel 14.

[0061] In this embodiment, before use, the air nozzles 72 are connected to an external air pump through pipes. The processor controls the four air nozzles 72 to open, and the four air nozzles 72 start to blow and clean the side of the screen printing plate close to the camera 62. Then, while turning over the screen printing plate, purging is performed at different angles. After turning over is completed, the four air nozzles 72 blow and clean the other side of the screen printing plate, thereby preventing the broken wire filaments from being adsorbed on the surface of the screen printing plate, causing misjudgment by the processor and affecting the detection.

[0062] Specifically, the blanking assembly 8 includes a first blanking plate 83 and a second blanking plate 84. The first blanking plate 83 is located on the left side of the base 11, and the second blanking plate 84 is located on the back of the base 11. A qualified hole 82 is opened through the bottom of the bottom plate 12, and the inside of the qualified hole 82 is communicated with the inside of the second blanking plate 84. A defective hole 81 is opened through the bottom of the bottom plate 12, and the inside of the defective hole 81 is communicated with the inside of the first blanking plate 83.

[0063] In this embodiment, after purging is completed, when the processor detects and determines that one side of the screen printing plate is qualified, the processor controls the rotating assembly 4 to turn over the screen printing plate for detection. When the processor detects and determines that the other side of the screen printing plate is qualified, the processor controls the stepping motor 21, and the clamp 3 with the screen printing plate drives the screen printing plate to move to the top of the qualified hole 82, and then blanking is performed. The qualified screen printing plate penetrates through the inside of the qualified hole 82 under the action of gravity and moves to the second blanking plate 84. The qualified screen printing plate is guided by the second blanking plate 84 and moves to the ground for collection and packing by the staff.

[0064] When the processor detects and determines that one side or both sides of the screen printing plate are unqualified, the processor controls the clamp 3 to perform blanking. The unqualified screen printing plate penetrates through the inside of the defective hole 81 under the action of gravity and moves to the first blanking plate 83. The unqualified screen printing plate is guided by the first blanking plate 83 and moves to the ground for collection and packing by the staff.

[0065] Specifically, the stepping motor 21, the air nozzles 72, the camera 62, the telescopic rod 91, and the air cylinder 32 are all electrically connected to the processor.

[0066] The processor can control the rotation of the stepper motor 21, can open and close the air jet nozzle 72, can analyze the images transmitted back by the camera 62, and can control the telescopic movement of the telescopic rod 91 and the cylinder 32.

[0067] Working principle: Refer to the initial state Figure 3 , Figure 4 and Figure 7 , before use, connect the air jet nozzle 72 to an external air source through a pipeline and turn on the two fill lights 64. When in use, when the processor controls the cylinder 32 near the feeding port to contract, the telescopic end of the cylinder 32 retracts upward, driving the double-headed column upward. The double-headed column synchronously drives the connected guide plate 35 to move upward. Since the other end of the guide plate 35 is rotationally connected to the clamping plate 34 through the positive column 36, and the inclined end of the clamping plate 34 penetrates the side rod 33, when the guide plate 35 moves upward at this time, it pushes the inclined end of the clamping plate 34 to continue to penetrate the side rod 33 upward. At the same time, the vertical ends of the clamping plate 34 move away from each other. The operator places the screen printing plate on one side opposite to the two molds 38 by hand. Then the processor controls the cylinder 32 near the feeding port to extend, driving the double-headed column downward. The double-headed column synchronously drives the connected guide plate 35 to move downward. Since the other end of the guide plate 35 is rotationally connected to the clamping plate 34 through the positive column 36, and the inclined end of the clamping plate 34 penetrates the side rod 33, when the guide plate 35 moves downward at this time, it pulls the inclined end of the clamping plate 34 to continue to penetrate the side rod 33 downward. At the same time, the vertical ends of the clamping plate 34 move closer to each other. The two clamping plates 34 drive the two molds 38 to move closer to each other, and the two molds 38 fix the screen printing plate inside the two molds 38;

[0068] Then the processor controls the stepper motor 21 to rotate clockwise by 120°. The output end of the stepper motor 21 drives the three jigs 3 to rotate clockwise by 120° with the stepper motor 21 as the center. The jig 3 with the screen printing plate drives the screen printing plate to move to the side opposite to the fill light 64 and the camera 62.

[0069] The processor activates four jet nozzles 72, and the four jet nozzles 72 blow air to clean the side of the screen printing stencil near the camera 62. The processor controls the telescopic rod 91 to extend. The telescopic end of the telescopic rod 91 drives the two hemispheres 92 to move towards the side close to the screen printing stencil. The two hemispheres 92 drive the guide post 41 to rotate clockwise by 180° through the threaded groove 42. The guide post 41 drives the side post 51 to rotate clockwise. The side post 51 drives the clamping block 52 to move through the spring. The clamping block 52 is extruded by the reaction force of the bracket 31 to move out of the inner side of the circular groove 23 away from the stepping motor 21 and then move into the inner side of the side post 51. At this time, the clamping block 52 is disengaged from the contact with the circular groove 23, releasing the restriction on the fixture 3. At this time, the guide post 41 can drive the fixture 3 to rotate. When the guide post 41 drives the fixture 3 to rotate clockwise by 180°, at this time, the fixture 3 drives the screen printing stencil to rotate clockwise by 180° synchronously. At this time, the clamping block 52 corresponds to the position of the circular groove 23 on the other side. The clamping block 52 moves into the inner side of the circular groove 23 under the action of the elastic force of the spring, thus restricting the rotation of the fixture 3 during the movement, and then turning over the screen printing stencil. The four jet nozzles 72 blow air to clean the other side of the screen printing stencil, thus avoiding detection errors caused by the shielding of the etched broken wire mesh;

[0070] After purging, the camera 62 takes a picture of the wire mesh and transmits the captured data to the processor. The processor detects and determines that one side of the wire mesh screen is qualified. The processor controls the telescopic rod 91 to contract. The telescopic end of the telescopic rod 91 drives the two hemispheres 92 to move away from the wire mesh screen. The two hemispheres 92 drive the guide post 41 to rotate counterclockwise by 180° through the threaded groove 42. The guide post 41 drives the side post 51 to rotate counterclockwise. The side post 51 drives the block 52 to move through the spring. Under the reaction force of the bracket 31, the block 52 squeezes the spring and moves out of the inner side of the circular groove 23 near the stepping motor 21 and then moves into the inner side of the side post 51. At this time, the block 52 is disengaged from the circular groove 23, releasing the restriction on the fixture 3. At this time, the guide post 41 can drive the fixture 3 to rotate. The guide post 41 drives the fixture 3 to rotate counterclockwise by 180°. The fixture 3 drives the wire mesh screen to rotate counterclockwise by 180°. At this time, the fixture 3 drives the wire mesh screen to rotate counterclockwise by 180° synchronously. At this time, the block 52 corresponds to the position of the circular groove 23 away from the stepping motor 21. The block 52 moves out of the inner side of the side post 51 under the elastic force of the spring and then moves into the inner side of the circular groove 23 away from the stepping motor 21, thereby restricting the rotation of the fixture 3. The camera 62 takes a picture of the wire mesh and transmits the captured data to the processor. The processor detects and determines that the other side of the wire mesh screen is qualified. The processor controls the stepping motor 21 to rotate clockwise by 120°. The output end of the stepping motor 21 drives the three fixtures 3 to rotate clockwise by 120° with the stepping motor 21 as the center through the rotating plate 22. The fixture 3 with the wire mesh screen drives the wire mesh screen to move to the top of the qualified hole 82. Then the cylinder 32 of the processor that holds the fixture 3 with the qualified wire mesh screen contracts. The telescopic end of the cylinder 32 retracts upward, driving the double-headed column upward. The double-headed column synchronously drives the rotatably connected guide plate 35 to move upward. Since the other end of the guide plate 35 is rotatably connected to the clamping plate 34 through the positive column 36, and the inclined end of the clamping plate 34 penetrates through the side rod 33. At this time, when the guide plate 35 moves upward, it pushes the inclined end of the clamping plate 34 to continue to penetrate through the side rod 33 upward. At the same time, the vertical ends of the clamping plates 34 move away from each other. The two clamping plates 34 drive the two molds 38 to move away from each other, releasing the restriction on the wire mesh screen. The qualified wire mesh screen penetrates through the inner side of the qualified hole 82 under the action of gravity and moves to the second blanking plate 84. The qualified wire mesh screen is guided by the second blanking plate 84 to move to the ground for collection and packing by the staff;

[0071] The processor detects that one side of the wire mesh stencil is unqualified. The processor controls the cylinder 32 to contract. The telescopic end of the cylinder 32 retracts upward, driving the double-headed column upward. The double-headed column synchronously drives the guide plate 35 that is rotationally connected upward. Since the other end of the guide plate 35 is rotationally connected to the clamping plate 34 through the positive column 36, and the inclined end of the clamping plate 34 penetrates through the side rod 33, when the guide plate 35 moves upward at this time, it pushes the inclined end of the clamping plate 34 to continue to penetrate through the side rod 33 upward. At the same time, the vertical ends of the clamping plates 34 move away from each other. The two clamping plates 34 drive the two molds 38 to move away from each other, releasing the restriction on the wire mesh stencil. The unqualified wire mesh stencil to be detected penetrates through the inside of the defective hole 81 under the action of gravity and moves to the first blanking plate 83. The unqualified wire mesh stencil to be detected moves to the ground under the guidance of the first blanking plate 83 and is collected and packed by the staff;

[0072] During the detection and blanking process, the fixture 3 near the loading port can be loaded.

[0073] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A visual inspection device for a wire mesh, comprising a frame assembly (1), the frame assembly (1) includes a bottom plate (12) and a cover plate (15), a rotating assembly (2) is installed at the bottom of the cover plate (15), the rotating assembly (2) includes three rotating plates (22), a detection assembly (6) is installed at the top of the bottom plate (12), the detection assembly (6) includes a camera (62), a purging assembly (7) is installed at the top of the bottom plate (12), and a blanking assembly (8) is installed at the bottom of the bottom plate (12), characterized in that: A fixture (3) is respectively installed on the inner side of each rotating plate (22). The fixture (3) includes a bracket (31). A rotating assembly (4) is installed on the top of each bracket (31). The rotating assembly (4) includes a groove (43). A limiting assembly (5) is respectively installed on the outer side of the rotating assembly (4). A boosting assembly (9) is installed on the bottom of the cover plate (15). The boosting assembly (9) includes a telescopic rod (91) and a hemisphere (92). The rotating assembly (4) is assembled to be clamped inside the groove (43) at the bottom of the telescopic rod (91) by fitting two hemispheres (92) outside the telescopic rod (91), and converts the power of the telescopic movement of the telescopic rod (91) into the power for the rotating assembly (4) to drive the fixture (3) to rotate by slidingly connecting the two hemispheres (92) to two threaded grooves (42). The fixture (3) is assembled to clamp the screen printing plate and cooperate with the rotating assembly (4) to drive the screen printing plate to rotate reciprocally by 180°. A base (11) is installed at the bottom of the bottom plate (12). A side plate (13) is installed on the outer side of the bottom plate (12). A feeding port is penetrated and opened on the outer side of the side plate (13). A lamp barrel (14) is installed on the outer side of the side plate (13), and the lamp barrel (14) communicates with the side plate (13). A cover plate (15) is installed on the top of the side plate (13). A stepping motor (21) is installed on the bottom of the cover plate (15). Three rotating plates (22) are installed on the outer side of the output end of the stepping motor (21). Two circular grooves (23) are respectively opened on the tops of the three rotating plates (22). The limiting assembly (5) is assembled to squeeze the clamping block (52) inside the circular groove (23) by the spring inside the side column (51). The bottom of the clamping block (52) is hemispherical, thereby restricting the rotation of the fixture (3) during the movement process. Before the rotating assembly (4) flips the fixture (3), the clamping block (52) is installed on the top of the bottom wall of the side column (51) through a spring, and the clamping block (52) is located inside the circular groove (23) far from the stepping motor (21). When the rotating assembly (4) flips the fixture (3), the clamping block (52) squeezes the spring and moves into the inside of the side column (51). At this time, the clamping block (52) is separated from the circular groove (23), so that the side column (51) can drive the clamping block (52) to move on the top of the rotating plate (22). After the rotating assembly (4) flips the fixture (3) by 180 degrees, the clamping block (52) is located inside the circular groove (23) close to the stepping motor (21). The purging assembly (7) includes a column plate (71) and a blower (73). Four air nozzles (72) are installed on one side of the column plate (71) close to the lamp box (63). The blower (73) is installed on the outer side of the side plate (13), and the blower (73) is located in front of the lamp barrel (14).

2. The visual inspection device for a wire mesh according to claim 1, wherein: A cylinder (32) is fixed inside the bracket (31). A double-headed column is installed at the bottom of the telescopic end of the cylinder (32). Two guide plates (35) are rotatably connected to the outside of the double-headed column. Positive columns (36) are rotatably installed on the inner sides of the two guide plates (35). Clamping plates (34) are installed at the opposite ends of the two positive columns (36). Side rods (33) are respectively sleeved on the outer sides of the two clamping plates (34), and the other ends of the two side rods (33) are respectively welded to the outside of the bracket (31). Molds (38) are respectively detachably installed on the outer sides of the two clamping plates (34).

3. The visual inspection device for a wire mesh according to claim 1, characterized in that: The telescopic rod (91) is installed at the bottom of the cover plate (15), and the telescopic rod (91) is located on the left side of the stepping motor (21). Two hemispheres (92) are installed on the outside of the telescopic end of the telescopic rod (91). A guide post (41) is installed at the top of each bracket (31). Two threaded grooves (42) are formed inside each guide post (41). A groove (43) is formed through the outside of each guide post (41), and the two hemispheres (92) are located inside the groove (43) close to the lamp barrel (14).

4. A visual inspection device for a wire mesh as described in claim 1, characterized in that: A support rod (61) is installed on the side of the camera (62) away from the lamp barrel (14), and the bottom of the support rod (61) is welded to the top of the bottom plate (12). A lamp box (63) is installed inside the lamp barrel (14), and two supplementary light lamps (64) are installed inside the lamp box (63).

5. The visual inspection device for a wire mesh according to claim 1, wherein: The blanking assembly (8) includes a first blanking plate (83) and a second blanking plate (84). The first blanking plate (83) is located on the left side of the base (11), and the second blanking plate (84) is located on the back of the base (11). A qualified hole (82) is formed through the bottom of the bottom plate (12), and the inside of the qualified hole (82) is communicated with the inside of the second blanking plate (84). A defective hole (81) is formed through the bottom of the bottom plate (12), and the inside of the defective hole (81) is communicated with the inside of the first blanking plate (83).

6. The vision inspection device for a wire mesh according to claim 1, characterized in that: The stepping motor (21), the air nozzle (72), the camera (62), the telescopic rod (91), and the cylinder (32) are all electrically connected to the processor.

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