Visual inspection equipment for substrate

Abstract

The invention provides substrate visual inspection equipment, which comprises a horizontal conveying mechanism, a positioning carrying table mechanism, a visual inspection mechanism and an NG marking mechanism, and is characterized in that the horizontal conveying mechanism is used for conveying a substrate to the positioning carrying table mechanism for positioning; the positioning platform deck mechanism forms a detection platform for substrate detection above the horizontal conveying mechanism; the visual detection mechanism is used for carrying out visual detection on the substrate on the positioning carrying table mechanism and comprises at least two cameras which are arranged left and right, a light source, a first moving assembly for respectively driving the two cameras to move left and right and a second moving assembly for respectively driving the two cameras to move up and down; the NG marking mechanism is used for marking the substrate with the detection result being NG, and the NG marking mechanism is located between the two cameras in the horizontal direction and located above the positioning carrying table mechanism in the vertical direction.

Description

Technical Field

[0001] This invention relates to the field of substrate inspection, and more particularly to a substrate visual inspection device. Background Technology

[0002] In traditional measurement fields, the detection of printing errors caused by misplacement of enamel-coated substrates typically relies on manual operation. The specific process involves an operator measuring the edges and corners of a substrate, obtaining data, and then comparing it with standard data to determine product quality. This traditional manual inspection method has several drawbacks: First, the manual measurement and comparison process is cumbersome and time-consuming, resulting in extremely low inspection efficiency and severely restricting production speed. Second, human judgment is prone to fatigue and subjective errors, leading to low inspection accuracy and unreliable results. Furthermore, it can only employ sampling inspection, failing to achieve 100% coverage of all products and posing a risk of missed quality checks.

[0003] Therefore, it is necessary to design a substrate visual inspection device to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a visual inspection device for detecting printing errors on enamel-coated substrates, so as to improve inspection efficiency and accuracy and achieve comprehensive product inspection.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a substrate visual inspection device, comprising a horizontal conveying mechanism, a positioning stage mechanism, a visual inspection mechanism, and an NG marking mechanism. The horizontal conveying mechanism is used to convey the substrate to the positioning platform mechanism for positioning. The positioning stage mechanism forms a detection platform for substrate detection above the horizontal conveying mechanism; The visual inspection mechanism is used to perform visual inspection on the substrate on the positioning stage mechanism. The visual inspection mechanism includes at least two cameras arranged left and right, a light source, a first moving component that drives the two cameras to move left and right respectively, and a second moving component that drives the two cameras to move up and down respectively. The NG marking mechanism is used to mark substrates with an NG detection result. The NG marking mechanism is located between the two cameras in the horizontal direction and above the positioning stage mechanism in the vertical direction.

[0006] As a further improvement of the present invention, the horizontal conveying mechanism includes a drive assembly and a belt; the drive assembly includes a drive motor, a drive wheel, a driven wheel, a transmission belt connecting the drive wheel and the driven wheel, and a plurality of pulleys that are poweredly connected to the driven wheel, the belt being disposed on the pulleys, and the belt forming the conveying plane of the conveying substrate.

[0007] As a further improvement of the present invention, four belts are arranged side by side, and the four belts are divided into two groups, with the two belts in each group arranged close to each other.

[0008] As a further improvement of the present invention, the horizontal conveying mechanism further includes a limiting component, which includes a lifting drive and a baffle disposed on the lifting drive. When the baffle is raised, it can stop the substrate being conveyed to a preset position.

[0009] As a further improved technical solution of the present invention, the positioning platform mechanism includes a lifting assembly and a clamping assembly. The lifting assembly includes a lifting drive located below the horizontal conveying mechanism and a lifting platform disposed on the lifting drive. The lifting platform moves up and down between two sets of belts under the drive of the lifting drive. The clamping assembly includes two horizontal drives respectively disposed on the left and right sides and their respective driven clamping plates. The two clamping plates are located on the left and right sides of the lifting assembly to clamp and position the substrate on the lifting platform.

[0010] As a further improvement of the present invention, the upper surface of the lifting platform is provided with two clearance grooves. When the lifting platform is raised to the point where its upper surface is higher than the upper surface of the belt, the inner belt of the two sets of belts is located in the clearance groove.

[0011] As a further improved technical solution of the present invention, the visual inspection mechanism further includes a first support and two second supports. The two first moving components are horizontally arranged on the first support. Each second support includes a vertical plate and a first horizontal plate arranged on the vertical plate. The vertical plate is connected to the first moving component. The camera is arranged on the first horizontal plate through the second moving component. The first support has a clearance opening to make way for the camera.

[0012] As a further improved technical solution of the present invention, the first moving component is a linear module, the second moving component is an adjusting screw, and a second horizontal plate is also fixed on the camera. The second horizontal plate is located below the first horizontal plate. The first horizontal plate and the second horizontal plate are connected by the adjusting screw. A guide rod is also provided on the side of the first horizontal plate facing the second horizontal plate, and a guide rod sleeve is provided on the second horizontal plate. When the camera height is adjusted by the adjusting screw, the guide rod slides along the guide rod sleeve.

[0013] As a further improvement of the present invention, the first horizontal plate is provided with a slider on the side facing the first bracket, and the first bracket is provided with a guide rail that cooperates with the slider. When the first moving component drives the second bracket to move, the slider slides along the guide rail.

[0014] As a further improved technical solution of the present invention, the NG marking mechanism includes a horizontal drive, a vertical drive and a scraper connected in sequence. The vertical drive drives the scraper to move up and down, and the horizontal drive drives the scraper to move back and forth. The width direction of the scraper forms an acute angle with its back and forth movement direction.

[0015] As can be seen from the above technical solutions, the substrate visual inspection device of the present invention has at least the following effects: 1. Through the coordinated operation of the horizontal conveying mechanism, the positioning stage, and the vision inspection mechanism, the automatic "conveyance-positioning-inspection" of the substrate is realized: The horizontal conveying mechanism can continuously transport the substrate to the lifting assembly, and the lifting assembly and the clamping assembly work together to ensure the stability of the substrate position; The two left and right arranged cameras of the vision inspection mechanism, together with the first moving assembly and the second moving assembly, can quickly position the cameras, and the dual-camera collaborative shooting can simultaneously complete the acquisition of images of both sides and corners, greatly reducing the inspection time of a single substrate; At the same time, the cameras improve the detection accuracy through optical imaging and image algorithm analysis, solving the problems of insufficient accuracy and subjective error of manual inspection, and significantly improving the stability and reliability of inspection.

[0016] 2. The NG marking mechanism adopts an optimized layout of "horizontally located between the two cameras and vertically located above the positioning stage mechanism", forming a smooth "inspection-marking" connection with the vision inspection mechanism: when the vision inspection mechanism determines that it is NG, the marking mechanism directly and quickly marks the defect location while the substrate is still in a stable state on the positioning stage, avoiding the delay and error of manual marking. At the same time, there is no need to transfer the NG substrate to a separate marking area, which greatly shortens the process time. In addition, the layout between the mechanisms is compact, reducing the equipment footprint.

[0017] 3. The dual-camera setup with adjustable spacing and height, working in conjunction with the adjustable-width clamping assembly, is compatible with the detection of various substrate types: The dual cameras adjust the left and right spacing via the first moving component (to adapt to enamel-coated substrates of different widths), and adjust the up and down height via the second moving component (to adapt to enamel-coated substrates of different thicknesses). Without changing the cameras, it can adapt to enamel-coated substrates of various sizes and thicknesses, eliminating the need for frequent replacements or modifications due to changes in product specifications, and significantly reducing equipment investment and maintenance costs. Attached Figure Description

[0018] Figure 1 This is a perspective view of a substrate visual inspection device according to an embodiment of the present invention.

[0019] Figure 2 This is a three-dimensional view of the horizontal conveying mechanism and the positioning platform mechanism.

[0020] Figure 3 This is a three-dimensional view of the horizontal conveying mechanism and the positioning platform mechanism from another angle.

[0021] Figure 4 This is a 3D view of the clamping component.

[0022] Figure 5 This is a partial 3D view of the lifting assembly.

[0023] Figure 6 This is a 3D view of a visual inspection agency.

[0024] Figure 7 This is a partial side view of the visual inspection facility.

[0025] Figure 8 A three-dimensional view of the NG marking mechanism.

[0026] Figure 9 This diagram shows the positional relationship between the positioning platform mechanism, the visual inspection mechanism, and the NG marking mechanism. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Please refer to Figure 1 As shown, the present invention provides a substrate visual inspection device, which includes a machine base 10, a horizontal conveying mechanism 20, a positioning stage mechanism 30, a visual inspection mechanism 40, and an NG marking mechanism 50 disposed on the machine base 10. The machine base 10 specifically includes a base 11 and a frame 12 disposed on the base 11. The horizontal conveying mechanism 20 and the positioning stage mechanism 30 are disposed on the base 11, and the visual inspection mechanism 40 and the NG marking mechanism 50 are mounted on the frame 12.

[0029] The horizontal conveyor mechanism 20 is used to convey the substrate to the positioning stage mechanism 30 for positioning. Please refer to... Figure 2 and Figure 3 As shown, the horizontal conveying mechanism 20 includes a bracket 21, a drive assembly 22, a belt 23, a loading limit plate 24 and a limit assembly 25 located on one side of the belt 23.

[0030] The drive assembly 22 includes a drive motor 221, a drive pulley 222, a driven pulley 223, a transmission belt 224 connecting the drive pulley 222 and the driven pulley 223, and several pulleys 225 poweredly connected to the driven pulley 223. The belt 23 is mounted on the pulleys 225, forming the conveying plane of the conveying substrate. The driven pulley 223 and pulleys 225 are rotatably mounted on the bracket 21. Four belts 23 are arranged side by side, divided into two groups, with the two belts in each group positioned close to each other. Preferably, there are four pulleys 225, located on the left and right sides of the bracket 21, with the driven pulley 223 located at the front, each end of which is poweredly connected to two pulleys 225. With this arrangement, two pulleys 225 on the same side drive one set of belts 23 for conveying.

[0031] The limiting component 25 includes a lifting drive and a baffle on the lifting drive. When the baffle is raised, it can stop the substrate being transported to the preset position.

[0032] The positioning stage mechanism 30 forms a testing platform for substrate testing above the horizontal conveying mechanism 20. Please refer to... Figure 2 and Figure 3 As shown, the positioning platform mechanism 30 includes a lifting assembly 31 and a clamping assembly 32. Please refer to the diagram. Figure 4 As shown, the lifting assembly 31 includes a lifting drive 311 located below the horizontal conveying mechanism 20 and a lifting platform 312 mounted on the lifting drive 311. The lifting platform 312 moves up and down between two sets of belts 23 under the drive of the lifting drive 311. Two clearance grooves 3121 are formed on the upper surface of the lifting platform 312. When the lifting platform 312 rises until its upper surface is higher than the upper surface of the belts 23, the inner belt of the two sets of belts is positioned in the clearance groove 3121. Additionally, a longitudinal clearance groove 3122 is formed on the front side of the lifting platform 312 to partially accommodate the limiting assembly 25, resulting in a reasonable and compact layout between the lifting assembly 31 and the limiting assembly 25, with high space utilization.

[0033] Please participate together Figure 5 As shown, the bracket 21 includes two vertical plates 211 arranged side by side, and a horizontal mounting plate 212 is provided on the outer side of each vertical plate 211. The clamping assembly 32 includes two horizontal drives 321 arranged on the left and right sides respectively, and their respective driven clamping plates 322. The two horizontal drives 321 are respectively disposed opposite to the two horizontal mounting plates 212. The two clamping plates 322 are located on the left and right sides of the lifting assembly 31 to clamp and position the base plate on the lifting platform 312.

[0034] The visual inspection mechanism 40 is used to perform visual inspection on the substrate on the positioning stage mechanism 30. Please refer to... Figure 6 and Figure 7 As shown, the visual inspection mechanism 30 includes two cameras 41 arranged side to side, a light source 46, a first support 44, two first supports 45, a first moving component 42 that moves the two cameras 41 left and right respectively, and a second moving component 43 that moves the two cameras 41 up and down respectively. The light source 46 includes two light sources that cooperate with the left camera and two light sources that cooperate with the right camera. The light source corresponding to each camera includes a side light source and a back light source to avoid the detection blind spot of a single light source.

[0035] The first bracket 44 is fixed to the frame 12, and two first moving components 42 are horizontally mounted on the first bracket 44. Each second bracket 45 includes a vertical plate 451 and a first horizontal plate 452. The vertical plate 451 is connected to the first moving component 42 in a one-to-one correspondence. The first horizontal plate 452 is mounted on the vertical plate 451. The camera 41 is mounted on the first horizontal plate 452 via the second moving component 43. The first bracket 44 has a clearance opening 441 to allow the camera 41 to move.

[0036] The second moving component 43 includes an adjusting screw 431. A second horizontal plate 453 is also fixed to the camera 41. The second horizontal plate 453 is located below the first horizontal plate 452, and the first horizontal plate 452 and the second horizontal plate 453 are connected by the adjusting screw 431. A guide rod 433 is also provided on the side of the first horizontal plate 452 facing the second horizontal plate 453, and a guide rod sleeve 432 is provided on the second horizontal plate 453. When the height of the camera 41 is adjusted by adjusting the adjusting screw 431, the guide rod 433 slides along the guide rod sleeve 432.

[0037] The first moving component 42 is preferably a linear module. A slider 423 is provided on the side of the first horizontal plate 452 facing the first support 44. A guide rail 422 that cooperates with the slider 423 is provided on the first support 44. When the first moving component 42 drives the second support 45 to move, the slider 423 slides left and right along the guide rail 422.

[0038] The NG marking mechanism 50 is used to mark substrates with an NG test result. Please refer to... Figure 8 and Figure 9As shown, the NG marking mechanism 50 is located horizontally between the two cameras 41 and vertically above the positioning platform mechanism 30. The NG marking mechanism 50 includes an inverted U-shaped bracket 51, a horizontal drive 52, a transition block 53, a vertical drive 54, an elastic seat 55, and a scraper 56 connected in sequence. The horizontal drive 52 is fixed below the bracket 51 and is used to drive the scraper 56 to move back and forth. The vertical drive 54 is used to drive the scraper 56 to move up and down. In this embodiment, the horizontal drive 52 and the vertical drive 54 are cylinders with their output shafts positioned front and rear. One vertical side a of the transition block 53 is perpendicularly connected to the output shaft of the horizontal drive 52, and the other vertical side b is fixed to the cylinder body of the vertical drive 54. The two vertical sides a and b of the transition block 53 form an acute angle. The scraper 56 is elastically connected to the output shaft of the vertical drive 54 through the elastic seat 55, and the width direction of the scraper 56 is parallel to the vertical side b. Therefore, the width direction of the scraper 56 forms an acute angle with its back-and-forth movement direction. With this configuration, the scraper 56 can smoothly scrape a scratch of a certain width on the substrate, rather than a thin line. The marking is clear and easy to observe in subsequent processes, preventing misplacement. In addition, since the width direction of the scraper 56 is at an acute angle to its forward and backward movement direction, it avoids excessive friction between the scraper and the substrate when it is completely perpendicular, which would affect the service life of the scraper and other components of the NG marking mechanism 50.

[0039] The inspection process of the substrate visual inspection equipment in this embodiment is as follows: 1. First, adjust the position of the loading limit plate and the position of the clamping assembly according to the size of the substrate; 2. Manually load the substrate onto the conveyor belt, ensuring one side of the substrate is against the loading limit plate to complete the left and right positioning during unloading; 3. The conveyor belt feeds the substrate into the detection position (i.e., above the lifting assembly), and the lifting platform lifts the substrate, separating it from the conveyor belt and raising it to the detection height; 4. The clamping assembly opens, and the base plate is positioned centered on the left and right sides; 5. The visual inspection mechanism automatically adjusts the horizontal position of the two cameras according to the length of the substrate, using the first moving component, to photograph the two side corner areas of the product; 6. The visual inspection agency determines whether the substrate is OK or NG based on the image. If the result is NG, the NG marking agency extends its scraper and scratches a mark on the surface of the substrate. If the result is OK, no marking is performed. 7. The clamping assembly is reset, the lifting platform descends, and the substrate falls back onto the conveyor belt. NG products are either manually removed or flow to the machine docked with the rear end of the horizontal conveyor mechanism for rejection. OK products are conveyed by the belt in reverse to other docking machines.

[0040] The terms used herein, such as “up,” “down,” “front,” “back,” “left,” and “right,” indicating relative spatial positions, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims.

[0041] Furthermore, the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of this specification should be based on those skilled in the art. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A substrate visual inspection apparatus, comprising a horizontal conveying mechanism, a positioning stage mechanism, a visual inspection mechanism and an NG marking mechanism, characterized in that: the horizontal conveying mechanism is used to convey a substrate to the positioning stage mechanism for positioning; the positioning stage mechanism forms a detection platform above the horizontal conveying mechanism for substrate detection; the visual inspection mechanism is used to visually inspect the substrate on the positioning stage mechanism, and comprises a light source, at least two cameras arranged side by side, a first moving assembly for moving the cameras left and right, and a second moving assembly for moving the cameras up and down; and the NG marking mechanism is used to mark the substrate with an NG detection result, and is located between the two cameras in the horizontal direction and above the positioning stage mechanism in the vertical direction. The horizontal conveying mechanism comprises a driving assembly and a belt; the driving assembly comprises a driving motor, a driving wheel, a driven wheel, a transmission belt connecting the driving wheel and the driven wheel, and a plurality of pulleys in power connection with the driven wheel; the belt is arranged on the pulleys, and forms a conveying plane for conveying the substrate. The belt is arranged in parallel with four belts, and the four belts are divided into two groups, and the two belts in each group are arranged close to each other. The horizontal conveying mechanism further comprises a limiting assembly, which comprises a lifting drive and a baffle arranged on the lifting drive; when the baffle is raised, the substrate conveyed to a preset position can be stopped. The positioning stage mechanism comprises a jacking assembly and a clamping assembly; the jacking assembly comprises a lifting drive arranged below the horizontal conveying mechanism and a jacking table arranged on the lifting drive; the jacking table is lifted between the two groups of belts under the driving of the lifting drive; the clamping assembly comprises two horizontal drives arranged on the left and right sides respectively and clamping plates driven by the horizontal drives respectively; the two clamping plates are arranged on the left and right sides of the jacking assembly to clamp and position the substrate on the jacking table left and right.

2. The substrate vision inspection apparatus of claim 1, wherein: The upper surface of the jacking table is provided with two accommodation grooves; when the jacking table is raised to a height higher than the upper surface of the belt, the inner belt in the two groups of belts is located in the accommodation groove.

3. The substrate vision inspection apparatus of claim 2, wherein: The visual inspection mechanism further comprises a first support and two second supports; the first moving assemblies are horizontally arranged on the first support; each second support comprises a vertical plate and a first horizontal plate arranged on the vertical plate; the vertical plate is connected with the first moving assembly; the cameras are arranged on the first horizontal plates through the second moving assemblies; and the first support is provided with an accommodation opening for the cameras.

4. The substrate vision inspection apparatus of claim 1, wherein: The first moving assembly is a linear module, the second moving assembly is an adjusting screw, the camera is further fixed with a second horizontal plate, the second horizontal plate is located below the first horizontal plate, the first horizontal plate and the second horizontal plate are connected through the adjusting screw, one side of the first horizontal plate towards the second horizontal plate is further provided with a guide rod, and the second horizontal plate is provided with a guide rod sleeve; when the height of the camera is adjusted through the adjusting screw, the guide rod slides along the guide rod sleeve.

5. The substrate vision inspection apparatus of claim 3, wherein: ​ 6. The substrate vision inspection apparatus of claim 5, wherein: ​ 7. The substrate vision inspection apparatus of claim 1, wherein: ​ 8. The substrate vision inspection apparatus of claim 7, wherein: ​ 9. The substrate vision inspection apparatus of claim 8, wherein: The first horizontal plate is provided with a sliding block on one side of the first support, and the first support is provided with a guide rail matched with the sliding block, and when the first moving assembly drives the second support to move, the sliding block slides along the guide rail.

10. The substrate vision inspection apparatus of claim 1, wherein: The NG marking mechanism comprises horizontal driving, vertical driving and a scraper connected in sequence, the vertical driving drives the scraper to move up and down, the horizontal driving drives the scraper to move forward and backward, and the width direction of the scraper is at an acute angle with the forward and backward moving direction of the scraper.

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