Visual detection device for surface treatment of metal sheet

Abstract

The present application relates to a kind of visual inspection device for metal plate surface treatment, belong to visual inspection technical field.It includes detection equipment, the detection equipment left and right sides are provided with conveying device, the conveying device is conveyed with metal plate body, the detection equipment one end is provided with warping detection component, the detection equipment front and rear two inner walls are provided with synchronous handling structure, the detection equipment inside is provided with turnover component, the inner wall top of the detection equipment is provided with driving component, the driving component is provided with self-adapting shooting component;The warping detection component is used to collect the surface deformation signal of metal plate body, and the position of warping point is marked in conjunction with displacement information and uploaded.The present application can realize the automatic positioning of metal plate warping defect, double-side full visual detection and self-adapting high-definition shooting, detection precision is high, and it is suitable for quality detection after the surface treatment of various metal plates.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology, and in particular to a visual inspection device for surface treatment of metal sheets. Background Technology

[0002] Visual inspection refers to the process of converting the captured target into an image signal using machine vision products, transmitting it to a dedicated image processing system, and then converting it into a digital signal based on pixel distribution, brightness, color, and other information. The image system performs various calculations on these signals to extract the target's features, and then controls the on-site equipment based on the judgment results.

[0003] In metal sheet surface treatment production lines, visual inspection is a key link in ensuring product quality. Most existing equipment can only take conventional pictures of the sheet surface, making it difficult to accurately locate and quantify warping-type deformation defects. This can easily lead to problems such as missed detection of slight warping and inaccurate warping point location. At the same time, sheet warping can cause changes in the shooting distance, and conventional cameras cannot adaptively adjust focus, which can easily result in blurry images, ghosting, and out-of-focus images, seriously affecting the accuracy of the inspection results.

[0004] Therefore, this application provides a visual inspection device for surface treatment of metal sheets to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a visual inspection device for surface treatment of metal sheets, so as to solve the problems of inaccurate positioning and quantitative detection of warping defects and the blurry imaging caused by the difficulty of adaptive focusing of conventional cameras.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A visual inspection device for surface treatment of metal sheets includes an inspection unit, conveying devices on its left and right sides for conveying metal sheet bodies, a warpage detection component at one end of the inspection unit, synchronous transport structures on its front and rear inner walls, a flipping component inside the inspection unit, a driving component on the top of its inner wall, and an adaptive imaging component on the driving component. The warpage detection component collects surface deformation signals of the metal sheet body, marks warpage points based on displacement information, and uploads the data. The flipping component clamps and flips the metal sheet body, facilitating visual inspection of both the top and bottom surfaces of the metal sheet body by the adaptive imaging component. The driving component moves the adaptive imaging component along the X and Y axes for comprehensive visual inspection of metal sheet bodies of different sizes. The adaptive imaging component receives warpage point position signals, automatically adjusts its focus based on the amount of warpage, and achieves clear imaging and visual inspection, improving inspection accuracy.

[0008] Optionally, the warpage detection component includes two symmetrically arranged mounting brackets, with two vertically symmetrical mounting plates fixedly connected between the mounting brackets. Several linearly variable differential transformers are mounted on the inner side of the mounting plates, and springs are mounted on the linearly variable differential transformers. The linearly variable differential transformers are used to collect spring deformation.

[0009] Optionally, the other end of the spring is mounted on a fixed shaft, and a roller is rotatably connected to both ends of the fixed shaft. The roller makes rolling contact with the upper and lower surfaces of the metal sheet body.

[0010] Optionally, each of the two mounting brackets has a connecting body inside, and each connecting body has a roller rotatably connected inside. The roller makes rolling contact with the side of the metal plate body. An infrared transmitter is installed on one of the connecting bodies, and an infrared receiver is installed on the other connecting body. The infrared transmitter and infrared receiver work together to record the moment of signal interruption. Combined with the speed of the transmission device, the coordinates of the warping point are calculated and marked.

[0011] Optionally, the synchronous transport structure includes two electromagnetic slide rails installed on the front and rear inner walls of the testing equipment. A robotic arm is mounted on the slider of the electromagnetic slide rail, and the robotic arm is used to transport the metal sheet body that has passed through the warping testing component.

[0012] Optionally, the flipping assembly includes a flipping motor mounted on a movable plate. An electric telescopic rod is mounted on the side of the movable plate. The drive end of the flipping motor is connected to an abutment plate. Two transparent clamps are fixedly connected to the abutment plate, and elastic rubber is provided on the inner side of the abutment plate.

[0013] Optionally, the drive assembly includes two Y-axis drive motors, the drive ends of the Y-axis drive motors are driven by a threaded rod, the threaded rod is threadedly connected to a movable slider, the top of the movable slider is fixedly connected to a T-shaped connecting block, and the two ends of the T-shaped connecting block are rotatably connected to rollers.

[0014] Optionally, a slide rail is fixedly connected to the top of the inner wall of the testing device, and the roller three rolls in cooperation with the slide rail.

[0015] Optionally, the drive assembly further includes an X-axis drive motor, the drive end of which is driven and connected to a threaded rod II, the threaded rod II being threadedly connected to a movable slider II, and both ends of the threaded rod II being rotatable within the movable slider I.

[0016] Optionally, the adaptive shooting component includes a protective case, which is fixedly connected to the bottom of the movable slider two. An electric telescopic rod two is provided inside the protective case. A damping block is installed at the movable end of the electric telescopic rod two. The damping block slides inside the protective case. An industrial camera is detachably installed at the bottom of the damping block.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above scheme, by setting up a warp detection component, a structure consisting of a linear variable differential transformer, springs, and rollers arranged symmetrically, it can highly sensitively collect minute deformations on the upper and lower surfaces of the metal sheet, accurately identify slight warp defects, and has a fast detection response and high accuracy. Roller 1 rolls in contact with the sheet to reduce surface scratches, while rollers 2 on both sides provide lateral guidance and limit to prevent transport deviation. The infrared transmitter and infrared receiver form a beam path to accurately record the moment of signal interruption. Combined with the transmission speed, the coordinates of the warp point can be accurately calculated to complete automatic positioning, marking, and data uploading, providing accurate target points and focusing basis for subsequent shooting, thus improving detection accuracy and efficiency.

[0019] By incorporating a flipping component, the electric telescopic rod flexibly adjusts the clamping distance to accommodate metal sheets of varying widths. The flipping motor drives the sheet to rotate 180 degrees stably, enabling automatic reversal of the upper and lower surfaces and improving double-sided inspection efficiency. The transparent clamping plate does not obstruct the inspection area, ensuring no blind spots in the imaging. The elastic rubber on the inner side of the contact plate increases friction and provides cushioning protection, preventing sheet deformation or indentation. The overall structure operates stably and is accurately positioned, providing a stable inspection posture for imaging. This solves the problems of traditional devices being unable to automatically flip and incomplete inspection, thus improving the completeness of the inspection.

[0020] By setting up a drive component with bidirectional X-axis and Y-axis drive, combined with threaded rod transmission and roller slide guide, the movement is smooth and the positioning is accurate. It can drive the adaptive shooting component to achieve full-area coverage movement and adapt to the inspection of different sized plates. The Y-axis moving slider one is connected to the roller three through a T-shaped connecting block and slide, which reduces resistance and wear. The X-axis threaded rod two moves synchronously with the Y-axis, with strong structural rigidity. This component has small positioning error and smooth movement, and can quickly reach the detection point, providing reliable motion support for accurate shooting and improving the accuracy and efficiency of defect detection.

[0021] By setting up an adaptive shooting component, an electric telescopic rod, and a damping block, the focal length of the industrial camera is automatically adjusted according to the amount of warpage, compensating for changes in object distance, avoiding image blur, and improving image clarity and defect recognition rate. The damping block slides smoothly, ensuring stable shooting. The protective box is dustproof and collision-proof, extending the camera's service life. The industrial camera is detachable for easy maintenance and calibration. The component is linked with the warpage detection data to achieve integrated automatic execution of positioning, focusing, shooting, and detection, improving detection accuracy, stability, and intelligence. Attached Figure Description

[0022] Figure 1 A three-dimensional structural diagram of a vision inspection device for surface treatment of metal sheets;

[0023] Figure 2 A cross-sectional view of a vision inspection device for surface treatment of metal sheets;

[0024] Figure 3 A cross-sectional view from another perspective of a vision inspection device for surface treatment of metal sheets;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the warp detection component;

[0026] Figure 5 A schematic diagram of the three-dimensional structure of the warp detection component and the metal sheet body;

[0027] Figure 6 This is a schematic diagram of the 3D structure of the flip component;

[0028] Figure 7 A schematic diagram of the three-dimensional structure of the flip component from another perspective;

[0029] Figure 8 This is a schematic diagram of the three-dimensional structure of the drive component;

[0030] Figure 9 A three-dimensional structural diagram of the driving component along the Y-axis;

[0031] Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point A in the diagram;

[0032] Figure 11 A three-dimensional structural diagram of the drive component's X-axis;

[0033] Figure 12 This is a cross-sectional view of the adaptive shooting component.

[0034] Figure label:

[0035] 1. Testing equipment; 2. Conveying device; 201. Metal sheet body; 3. Warpage detection assembly; 301. Mounting bracket; 302. Mounting plate; 303. Linear variable differential transformer; 304. Spring; 305. Fixed shaft; 306. Roller one; 307. Connector; 308. Roller two; 309. Infrared transmitter; 310. Infrared receiver; 4. Synchronous handling structure; 401. Electromagnetic slide rail; 402. Robotic arm; 5. Tilting assembly; 501. Tilting motor; 502. Moving plate; 5 03. Electric telescopic pole one; 504. Contact plate; 505. Transparent clamp; 506. Elastic rubber; 6. Drive assembly; 601. Y-axis drive motor; 602. Moving slider one; 603. T-shaped connecting block; 604. Roller three; 605. Slide rail; 606. X-axis drive motor; 607. Moving slider two; 608. Threaded rod one; 609. Threaded rod two; 7. Adaptive shooting assembly; 701. Protective box; 702. Electric telescopic pole two; 703. Damping block; 704. Industrial camera. Detailed Implementation

[0036] To further illustrate the technical means and effects adopted by the present invention in order to achieve the intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structures, features and effects of the present invention.

[0037] like Figures 1 to 12As shown, an embodiment of the present invention provides a visual inspection device for surface treatment of metal sheets, including an inspection device 1, conveying devices 2 arranged on the left and right sides of the inspection device 1, conveying a metal sheet body 201 on the conveying devices 2, a warpage detection component 3 arranged at one end of the inspection device 1, synchronous transport structures 4 arranged on the front and rear inner walls of the inspection device 1, a flipping component 5 arranged inside the inspection device 1, a driving component 6 arranged at the top of the inner wall of the inspection device 1, and an adaptive shooting component 7 arranged on the driving component 6. The warpage detection component 3 is used to collect surface deformation signals of the metal sheet body 201, mark the warpage point position by combining it with displacement information, and upload it. The flipping component 5 is used to clamp and flip the metal sheet body 201, so that the adaptive shooting component 7 can perform visual inspection on both the top and bottom surfaces of the metal sheet body 201. The driving component 6 is used to drive the adaptive shooting component 7 to move along the X-axis and Y-axis throughout the entire range, so as to perform comprehensive visual inspection on metal sheet bodies 201 of different sizes. Component 7 is used to receive the warp point position signal and automatically adjust the focus according to the warp amount to complete clear imaging and visual inspection, thereby improving the inspection accuracy. This invention integrates the conveying device 2, warp detection component 3, synchronous handling structure 4, flipping component 5, driving component 6, and adaptive shooting component 7 into the same inspection device 1, forming an integrated, fully automatic, closed-loop visual inspection system for metal sheet surfaces. The entire device can continuously complete sheet material conveying, warp point detection and positioning, station transfer, double-sided flipping of the sheet material, full-area scanning and shooting, and adaptive focusing detection without manual intervention, greatly improving the inspection efficiency and automation level of metal sheet surface treatment. It can simultaneously achieve high-precision visual inspection of the upper and lower surfaces of the metal sheet, effectively solving the problems of incomplete detection, inaccurate positioning, and blurred imaging of traditional inspection devices. It can be adapted to metal sheet bodies 201 of different lengths and widths, with strong versatility and high inspection stability, significantly improving the inspection accuracy of metal sheet surface quality and the product qualification rate.

[0038] like Figures 4 to 5As shown, the warpage detection component 3 includes two symmetrically arranged mounting brackets 301. Two vertically symmetrical mounting plates 302 are fixedly connected between the mounting brackets 301. Several linearly variable differential transformers 303 are mounted on the inner side of each mounting plate 302. Springs 304 are mounted on the linearly variable differential transformers 303, which are used to collect the deformation of the springs 304. The other end of each spring 304 is mounted on a fixed shaft 305. Rollers 306 are rotatably connected to both ends of the fixed shaft 305. Rollers 306 roll in contact with the upper and lower surfaces of the metal plate body 201. Connectors 307 are provided inside each of the two mounting brackets 301. Rollers 308 are rotatably connected to the inner side of each connector 307, and roll in contact with the side of the metal plate body 201. An infrared transmitter 309 is mounted on one connector 307, and an infrared receiver 310 is mounted on the other connector 307. The infrared transmitter 309 and infrared receiver 310 work together to record the moment of signal interruption, in conjunction with the transmission device 2. The speed is calculated and the coordinates of the warp point are marked. Through the warp detection component 3, a linear variable differential transformer 303 with symmetrical upper and lower arrangement, combined with spring 304 and roller 306 structure, is used to collect the small deformation of the upper and lower surfaces of the metal sheet body 201 in real time. The detection response is fast and the measurement accuracy is high. It can capture slight warp defects that are difficult to identify by conventional detection devices. The roller 306 rolls in contact with the sheet surface, which can reduce scratches on the sheet surface and ensure the appearance quality of the sheet. With the help of the two rollers 308 on both sides, the sheet is guided and positioned to avoid the sheet from shifting left and right during the transport process and ensure the uniformity of the detection benchmark. The signal switching of infrared transmitter 309 and infrared receiver 310 is used to accurately record the moment when the sheet enters and leaves the detection position. Combined with the transport speed of the conveyor 2, the specific coordinate position of the warp point in the length direction of the sheet can be accurately calculated, realizing the automatic positioning, marking and data uploading of warp defects. This provides accurate detection target points for the subsequent adaptive shooting component 7, which greatly improves the accuracy and efficiency of defect identification.

[0039] like Figure 2As shown, the synchronous transport structure 4 includes two electromagnetic slide rails 401 installed on the front and rear inner walls of the testing equipment 1. A robotic arm 402 is mounted on the slider of the electromagnetic slide rails 401. The robotic arm 402 is used to transport the metal sheet body 201 that has passed through the warping detection component 3. The electromagnetic slide rails 401 and robotic arms 402, installed on the front and rear inner walls of the testing equipment 1, form the synchronous transport structure 4. The two sets of robotic arms 402 can move synchronously and clamp together, ensuring that the metal sheet body 201 is subjected to uniform force and maintains a stable posture during transport, preventing the sheet from tilting, shaking, or falling, effectively reducing the risk of damage. The electromagnetic slide rails 401 have high positioning accuracy and stable movement speed, accurately transporting the metal sheet that has completed warping detection to the flipping and shooting station, ensuring smooth connection between processes and small displacement errors, improving the continuity and reliability of the overall testing process. The robotic arm 402 has fast action response and high control accuracy, adaptable to metal sheets of different thicknesses and specifications, and the transport process is stable and reliable, without interfering with subsequent testing processes, improving the overall operating efficiency of the device.

[0040] like Figures 6 to 7 As shown, the flipping assembly 5 includes a flipping motor 501, which is mounted on a movable plate 502. An electric telescopic rod 503 is mounted on the side of the movable plate 502. The drive end of the flipping motor 501 is connected to a contact plate 504. Two transparent clamping plates 505 are fixedly connected to the contact plate 504. Elastic rubber 506 is provided on the inner side of the contact plate 504. The clamping distance can be flexibly adjusted via the electric telescopic rod 503, adapting to metal sheet bodies 201 of different widths, thus broadening its applicability. The flipping motor 501 drives the contact plate 504 and the transparent clamping plates 505 to achieve a stable 180-degree flip. The rotation completes the reversal of the upper and lower surfaces of the board in one go, eliminating the need for manual flipping and significantly improving the efficiency of double-sided inspection. The transparent clamping plate 505 is made of light-transmitting material, which does not obstruct the surface of the clamped area of ​​the board during clamping, ensuring no blind spots in the inspection and complete image capture, and avoiding missed inspections due to clamping obstruction. The inner side of the contact plate 504 is equipped with elastic rubber 506, which can increase the clamping friction and also play a buffering and protective role, preventing excessive clamping force from causing deformation of the metal plate or surface indentation, thus protecting the appearance quality of the product. The overall structure operates stably and reliably, with accurate flipping and positioning, providing a good inspection posture for the adaptive shooting component 7.

[0041] like Figures 8 to 11As shown, the drive assembly 6 includes two Y-axis drive motors 601. The drive ends of the Y-axis drive motors 601 are driven by threaded rods 608. Threaded rods 608 are threadedly connected to movable sliders 602. A T-shaped connecting block 603 is fixedly connected to the top of the movable slider. Rollers 604 are rotatably connected to both ends of the T-shaped connecting block 603. A slide rail 605 is fixedly connected to the top of the inner wall of the detection device 1. Rollers 604 and slide rail 605 roll in cooperation. The drive assembly 6 also includes an X-axis drive motor 606. The drive end of the X-axis drive motor 606 is driven by a threaded rod 609. Threaded rod 609 is threadedly connected to movable sliders 607. Both ends of the threaded rod 609 can rotate within the movable slider 602. The drive assembly utilizes the Y-axis and X-axis... The bidirectional drive structure, combined with threaded rod transmission and roller slide 605 guidance, ensures high transmission accuracy, smooth movement, and no jamming or shaking. It can drive the adaptive imaging component 7 to achieve full-area coverage movement within the detection area, meeting the comprehensive scanning and detection needs of metal plates of different sizes. The T-shaped connecting block 603 on the top of the moving slider 1 602, together with the roller 3 604 and the slide 605, effectively reduces movement resistance, reduces transmission wear, and improves the service life and operational stability of the component. The threaded rod 2 609 is supported at both ends within the moving slider 1 602 and moves synchronously with the Y-axis. The structure is rigid and the positioning is accurate, ensuring that the adaptive imaging component 7 can achieve high-precision displacement control in both the X and Y directions, providing reliable motion support for accurate defect imaging and detection.

[0042] like Figure 12 As shown, the adaptive shooting component 7 includes a protective box 701, which is fixedly connected to the bottom of the movable slider 607. An electric telescopic rod 702 is installed inside the protective box 701. A damping block 703 is installed at the movable end of the electric telescopic rod 702, and slides inside the protective box 701. An industrial camera 704 is detachably installed at the bottom of the damping block 703. Through the cooperation of the electric telescopic rod 702 and the damping block 703, the height of the industrial camera 704 can be automatically adjusted in real time according to the warp amount at the warp point, achieving adaptive and precise focusing. This effectively compensates for changes in object distance caused by the warping of the sheet metal, avoiding image blur, ghosting, or out-of-focus images. The system significantly improves the clarity of captured images and the accuracy of defect recognition. The damping block 703 slides smoothly and without vibration, ensuring the stability of the images captured by the industrial camera 704 and improving the reliability of the inspection results. The protective box 701 effectively prevents dust and collisions, protecting the industrial camera 704 to work normally under complex conditions and extending its service life. The industrial camera 704 adopts a detachable installation method, which facilitates later maintenance, replacement and calibration, reducing equipment operating costs. The overall components have a fast response speed and high adjustment accuracy. It is linked with the warp detection component 3 to realize the integration of positioning, focusing and detection, significantly improving the overall accuracy and reliability of visual inspection of metal sheet surfaces.

[0043] The working principle of the technical solution provided by this invention is as follows:

[0044] After the work begins, the metal sheet body 201 is driven by the conveying device 2 on the left side of the detection equipment 1 and is smoothly conveyed forward along the set path, entering the detection area where the warp detection component 3 is located in sequence. The conveying device 2 runs at a constant speed to provide a reference speed parameter for the subsequent calculation of the warp point position.

[0045] When the metal sheet body 201 enters the warpage detection component 3, the symmetrically arranged rollers 306 maintain rolling contact with the upper and lower surfaces of the sheet, while the two rollers 308 on both sides maintain rolling contact with the sides of the sheet. This achieves sheet conveying guidance and position limiting, preventing sheet offset and wobbling. When a warpage defect exists on the sheet surface, the surface height changes, causing the rollers 306 and the fixed shaft 305 to shift, resulting in elastic deformation of the spring 304. The linear variable differential transformer 303 collects the deformation of the spring 304 in real time and uploads the deformation signal to the control system in real time. Simultaneously, the connecting bodies 307 on both sides... The infrared transmitter 309 and the infrared receiver 310 form a beam detection optical path. When the warped part of the board passes through the detection area, the infrared optical path is briefly blocked. The infrared receiver 310 records the start and end times of the signal interruption. The control system combines the duration of the infrared signal interruption and the conveying speed of the transmission device 2 to accurately calculate the coordinate position of the warped defect in the length direction of the board. Combined with the deformation data collected by the linear variable differential transformer 303, the specific location and magnitude of the warped point are determined, and the automatic marking and data storage of the warped point are completed, providing accurate target points and focusing parameters for subsequent adaptive shooting detection.

[0046] After the warpage detection is completed, the synchronous transport structure 4 is activated, and the robotic arm 402, which is installed on the electromagnetic slide rail 401 on the front and rear inner walls of the detection equipment 1, moves synchronously to smoothly clamp the metal plate body 201 and accurately move under the drive of the electromagnetic slide rail 401, transporting the plate to the detection station corresponding to the flipping component 5 and the adaptive shooting component 7, ensuring the plate's posture is stable and its positioning is accurate, providing a reliable foundation for the subsequent flipping and shooting processes.

[0047] After the metal sheet body 201 arrives at the designated workstation, the electric telescopic rod 503 of the flipping component 5 is activated, pushing the moving plate 502 and the contact plate 504 closer to both sides of the sheet, so that the transparent clamping plate 505 and the elastic rubber 506 clamp the two ends of the metal sheet body 201. The elastic rubber 506 provides cushioning and anti-slip function to avoid damage to the surface of the sheet. The transparent clamping plate 505 adopts a light-transmitting structure, which does not block the clamped area and ensures that there are no blind spots in the inspection. Then the robotic arm 402 releases the metal sheet body 201 and folds it to avoid affecting subsequent shooting and inspection. When it is necessary to inspect the other side of the sheet, the flipping motor 501 is activated, driving the contact plate 504, the transparent clamping plate 505 and the metal sheet body 201 to rotate 180 degrees synchronously and stably, so that the bottom surface of the metal sheet body 201 faces the adaptive shooting component 7, realizing the fully automatic reversal of the upper and lower surfaces and meeting the requirements of double-sided full visual inspection.

[0048] The drive component 6 receives instructions from the control system and drives the adaptive imaging component 7 to complete two-dimensional full-area movement along the X and Y axes. The Y-axis drive motor 601 starts, driving the threaded rod 608 to rotate, which in turn drives the movable slider 602 to move along the Y-axis. The T-shaped connecting block 603 at the top of the movable slider 602 and the roller 604 roll along the slide rail 605 at the top of the inner wall of the detection device 1, reducing motion resistance and improving running stability and positioning accuracy. The X-axis drive motor 606 starts simultaneously, driving the threaded rod 609 to rotate, which in turn drives the movable slider 607 to move along the X-axis. The two ends of the threaded rod 609 are supported inside the movable slider 602 and move synchronously with the Y-axis drive unit, realizing the adaptive imaging component 7 to move without dead angles and with full coverage in the detection plane. It can adapt to metal plate bodies 201 of different lengths and widths, ensuring full coverage of the area to be detected.

[0049] When the adaptive shooting component 7 moves to the position corresponding to the warp point along with the drive component 6, the industrial camera 704 receives the warp point position and warp amount data sent by the control system. The electric telescopic rod 702 inside the protective box 701 automatically extends and retracts according to the amount of warp. The drive damping block 703 slides smoothly along the inner wall of the protective box 701, driving the industrial camera 704 to rise and fall to adjust the shooting height, realizing adaptive and precise focusing, compensating for the change in object distance caused by the warping of the sheet metal, avoiding image blur, ghosting or out of focus, and ensuring clear and stable shooting images. After the industrial camera 704 completes the high-definition image acquisition, it uploads the image data to the vision inspection system for surface defect identification, analysis and judgment, and finally completes the fully automatic high-precision vision inspection of the upper and lower surfaces of the metal sheet body 201.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A visual inspection device for surface treatment of metal sheets, characterized in that, The device includes a testing device (1), which is equipped with a conveying device (2) on its left and right sides. The conveying device (2) carries a metal plate body (201). A warping detection component (3) is provided at one end of the testing device (1). A synchronous transport structure (4) is provided on the front and rear inner walls of the testing device (1). A flipping component (5) is provided inside the testing device (1). A driving component (6) is provided on the top of the inner wall of the testing device (1). An adaptive shooting component (7) is provided on the driving component (6). The warpage detection component (3) is used to collect surface deformation signals of the metal sheet body (201), mark the warpage point position in combination with displacement information and upload it; The flipping component (5) is used to clamp and flip the metal plate body (201) so that the adaptive shooting component (7) can perform visual inspection on both the upper and lower surfaces of the metal plate body (201). The driving component (6) is used to drive the adaptive shooting component (7) to move along the X-axis and Y-axis in the whole domain to perform comprehensive visual inspection of metal sheet bodies (201) of different sizes; The adaptive imaging component (7) is used to receive the warp point position signal, automatically adjust the focal length according to the amount of warp, complete clear imaging and visual detection, and improve detection accuracy.

2. The visual inspection device for surface treatment of metal sheets according to claim 1, characterized in that, The warpage detection component (3) includes two symmetrically arranged mounting brackets (301), and two vertically symmetrical mounting plates (302) are fixedly connected between the mounting brackets (301). Several linear variable differential transformers (303) are installed on the inner side of the mounting plates (302), and springs (304) are installed on the linear variable differential transformers (303). The linear variable differential transformers (303) are used to collect the deformation of the springs (304).

3. The visual inspection device for surface treatment of metal sheets according to claim 2, characterized in that, The other end of the spring (304) is mounted on the fixed shaft (305), and the two ends of the fixed shaft (305) are rotatably connected to rollers (306), which are in rolling contact with the upper and lower surfaces of the metal plate body (201).

4. The visual inspection device for surface treatment of metal sheets according to claim 3, characterized in that, Both mounting brackets (301) are provided with connecting bodies (307) on their inner sides. Rollers (308) are rotatably connected to the inner sides of the connecting bodies (307). The rollers (308) roll in contact with the side of the metal plate body (201). An infrared transmitter (309) is installed on one of the connecting bodies (307), and an infrared receiver (310) is installed on the other connecting body (307). The infrared transmitter (309) and the infrared receiver (310) work together to record the moment of signal interruption. Combined with the speed of the transmission device (2), the coordinates of the warping point are calculated and marked.

5. The visual inspection device for surface treatment of metal sheets according to claim 4, characterized in that, The synchronous transport structure (4) includes two electromagnetic slide rails (401) installed on the inner walls of the front and rear of the testing device (1). A robotic arm (402) is installed on the slider of the electromagnetic slide rail (401). The robotic arm (402) is used to transport the metal plate body (201) after passing through the warping detection component (3).

6. The visual inspection device for surface treatment of metal sheets according to claim 5, characterized in that, The flipping assembly (5) includes a flipping motor (501), which is mounted on a moving plate (502). An electric telescopic rod (503) is mounted on the side of the moving plate (502). The driving end of the flipping motor (501) is connected to a contact plate (504). Two transparent clamps (505) are fixedly connected to the contact plate (504). An elastic rubber (506) is provided on the inner side of the contact plate (504).

7. The visual inspection device for surface treatment of metal sheets according to claim 6, characterized in that, The drive assembly (6) includes two Y-axis drive motors (601). The drive end of the Y-axis drive motor (601) is connected to a threaded rod (608). The threaded rod (608) is threaded to a movable slider (602). A T-shaped connecting block (603) is fixedly connected to the top of the movable slider. Rollers (604) are rotatably connected to both ends of the T-shaped connecting block (603).

8. The visual inspection device for surface treatment of metal sheets according to claim 7, characterized in that, The top of the inner wall of the testing device (1) is fixedly connected to a slide rail (605), and the roller three (604) rolls in cooperation with the slide rail (605).

9. The visual inspection device for surface treatment of metal sheets according to claim 8, characterized in that, The drive assembly (6) also includes an X-axis drive motor (606), the drive end of which is driven by a threaded rod (609), the threaded rod (609) is threadedly connected to a movable slider (607), and both ends of the threaded rod (609) can rotate within the movable slider (602).

10. The visual inspection device for surface treatment of metal sheets according to claim 9, characterized in that, The adaptive shooting component (7) includes a protective box (701), which is fixedly connected to the bottom of the movable slider (607). An electric telescopic rod (702) is provided inside the protective box (701). A damping block (703) is installed at the movable end of the electric telescopic rod (702). The damping block (703) slides inside the protective box (701). An industrial camera (704) is detachably installed at the bottom of the damping block (703).

Images