A PCBA crack intelligent identification device based on front and back value comparison

Abstract

The utility model discloses a kind of PCBA crack intelligent identification device based on front-back value comparison, belong to crack identification device technical field, including workbench, its front and rear side is respectively loading and unloading station, detection station, it is installed with rotary table on it, it is installed with board positioning device on it, hydraulic lifting mechanism, isolation identification cover, it is installed in the bottom of hydraulic lifting mechanism, it includes cover shell, AOI optical equipment and fill light are installed in its inside.The technical points are: cover shell can isolate AOI optical equipment in inside with outside, avoid environmental light change influence its image acquisition accuracy, and fill light can ensure that cover shell has good illumination condition, facilitate AOI optical equipment accurate image information acquisition, rotary table can install two groups of board positioning device on it in two stations cyclically alternate, i.

Description

Technical Field

[0001] This utility model relates to the technical field of crack identification devices, specifically a PCBA crack intelligent identification device based on comparison of before and after values. Background Technology

[0002] This PCBA crack identification device, which compares pre- and post-test values, uses high-precision imaging technology to capture key features of the PCBA board under test and a standard board. It establishes a digital model and sets positioning anchor points, comparing the geometric parameter differences between the two boards in areas such as component positioning anchor points and pin connection positions. Combined with preset thresholds, it determines crack defects. The device employs automated algorithms to analyze the detected images in real time, quickly identifying minute cracks caused by welding stress, mechanical impact, or thermal expansion. It is particularly suitable for online quality inspection of high-density interconnect boards and irregularly shaped circuit boards. Its core advantage lies in achieving precise defect location and traceability analysis through quantitative comparison of standard and measured values, effectively reducing human visual inspection errors and improving electronic manufacturing yield and process optimization efficiency.

[0003] In existing technologies, high-resolution industrial cameras (e.g., 5 megapixels or higher) are often used to capture key features of PCBA surfaces through imaging. During the sampling process, the images captured by the industrial cameras are easily affected by the external lighting environment. Changes in the ambient light in the device's working environment can easily lead to deviations in the images captured by the industrial cameras. Consequently, during the comparison process, the deviations in the captured image information lead to deviations in the comparison results, affecting the efficiency and accuracy of crack identification. In addition, during the inspection process, workers usually install the board to be inspected on a carrier, and then collect and compare the data using an industrial camera. After the inspection is completed, workers remove the board and install a new board to be inspected. The above workflow has a long working cycle, which is not conducive to the efficient implementation of board inspection work. Therefore, to address the above problems, a PCBA crack intelligent identification device based on before-and-after value comparison is proposed. Utility Model Content

[0004] The technical problem this invention aims to solve is to provide a PCBA crack intelligent identification device based on before-and-after value comparison. This crack identification device collects and compares image information through an isolation identification cover. The cover includes an AOI optical device and a supplementary light. The cover isolates the internal AOI optical device from the outside environment, preventing changes in ambient light from affecting the accuracy of image acquisition. The supplementary light ensures good lighting conditions inside the cover, facilitating accurate image information acquisition by the AOI optical device. Simultaneously, the bottom of the isolation identification cover has a retractable sealing mechanism. When the isolation identification cover is lowered, the retractable sealing mechanism contacts the surface of the rotating platform to seal the gap between the isolation identification cover and the rotating platform, achieving better isolation. The retractable sealing mechanism consists of several sliding plates that can slide up and down. After contacting the rotating platform, the device slides upwards, ensuring a sealing effect without applying excessive downward pressure to the platform, thus extending its lifespan. Furthermore, the device features loading / unloading and inspection stations on the worktable. The rotating platform allows the two sets of board positioning devices mounted on it to alternate between these two stations. This means that while the isolation identification cover is collecting and identifying data, workers can simultaneously disassemble and install PCBA boards at the loading / unloading station, enabling simultaneous inspection and disassembly / assembly processes. This keeps the isolation identification cover constantly operational, significantly shortening the overall inspection cycle and greatly improving inspection efficiency. It solves the technical problems of existing technologies where image acquisition devices are easily affected by external lighting, leading to information deviations, and the long inspection cycle hinders efficient board inspection.

[0005] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0006] A PCBA crack intelligent identification device based on before-and-after value comparison includes a workbench with a loading / unloading station at the front and an inspection station at the rear. A rotatable turntable is mounted on the workbench, and two sets of board positioning devices corresponding to the loading / unloading and inspection stations are installed on the turntable for mounting PCBA boards and support plates. Support plates are positioned at the inspection station on the workbench and are equipped with a hydraulic lifting mechanism. An isolation identification cover is mounted at the bottom of the hydraulic lifting mechanism and can move up and down under its drive. A retractable bottom sealing mechanism is mounted at the bottom of the isolation identification cover and fits against the surface of the turntable when the cover is lowered. The isolation identification cover includes a housing. It houses a centrally located AOI optical device, with symmetrically arranged supplementary lights on both sides. The enclosure isolates the internal AOI optical device from the outside environment, preventing changes in ambient light from affecting the accuracy of image acquisition. The supplementary lights ensure good lighting conditions inside the enclosure, facilitating accurate image acquisition by the AOI optical device. Furthermore, the rotating platform allows the two sets of board positioning devices mounted on it to alternate between two workstations. This means that while the isolation identification cover is performing acquisition and identification, workers can disassemble and install PCBA boards at the loading and unloading station, significantly shortening the entire inspection process cycle and greatly improving inspection efficiency.

[0007] In one possible implementation, the retractable sealing mechanism includes a positioning guide cylinder and a sliding plate. The sliding plate has a telescopic groove for sliding connection with the positioning guide cylinder. In addition, the positioning guide cylinder is equipped with an anti-detachment cover plate that fits against the surface of the sliding plate. The sliding plate has an inverted L-shaped cross-section. The above solution enables the sliding installation of the sliding plate. When its bottom end fits against the surface of the rotating platform, it will slide upward under the reaction force. While ensuring the sealing effect, it will not apply a large downward pressure to the rotating platform, thus extending the life of the rotating platform.

[0008] In one possible implementation, a reset spring sheet is fixedly installed inside the telescopic groove, which contacts the bottom end of the positioning guide cylinder. The spring sheet is made of elastic material and its two ends are bonded to the groove wall. When the sliding plate slides upward, it stretches the reset spring sheet to deform and accumulate elastic potential energy. Then, the reset spring sheet applies downward pressure to the sliding plate to make it fit tightly against the surface of the rotating platform.

[0009] In one possible implementation, the AOI optical device and the supplementary light are equipped with a light shield, which consists of a curved panel with the supplementary light as the central axis and a connecting plate. The above structure can prevent the light emitted by the supplementary light from directly irradiating the AOI optical device and affecting its acquisition effect.

[0010] In one possible implementation, the front and rear ends of the housing are equipped with bolted, detachable baffles with their edges fitting against the inner wall of the housing. This structure can seal the housing and block external light. At the same time, its easy disassembly allows it to be quickly removed during maintenance, facilitating the maintenance and replacement of AOI optical equipment and supplementary lighting inside the housing.

[0011] In one possible implementation, the hydraulic lifting mechanism includes a cantilever plate mounted on a support plate, on which a hydraulic cylinder is installed. The output shaft of the hydraulic cylinder is bolted to the cover. Two symmetrically arranged guide rods are slidably arranged on the cantilever plate, and their bottom ends are fixedly connected to the cover. The above structure can drive the cover to move up and down through the hydraulic cylinder. When the cover is raised, the plate positioning device can smoothly enter directly below it. During testing, the cover moves down to cover the corresponding plate positioning device, isolating and sealing the sampling environment.

[0012] In one possible implementation, storage boxes are provided on both sides of the workbench, one storage box is used to store qualified PCBA boards and the other storage box is used to store unqualified PCBA boards. The above structure can classify and store qualified and unqualified PCBA boards respectively.

[0013] In one possible implementation, the storage box includes a main body with several storage slots formed inside by partitions. A mounting plate is fixedly provided on the back of the main body, and several magnetic adsorption sheets are embedded thereon. The above structure can neatly store multiple PCBA boards. At the same time, the magnetic adsorption sheets can adsorb and install the storage box on the workbench, making it easy to remove the entire storage box and transfer the PCBA boards stored inside to a designated location.

[0014] In summary, this utility model has the following beneficial technical effects:

[0015] The crack recognition device collects and compares image information through an isolation recognition cover. It includes a cover, in which AOI optical equipment and a supplementary light are installed. The cover can isolate the internal AOI optical equipment from the outside world, avoiding the impact of changes in ambient light on the accuracy of image acquisition. The supplementary light can ensure good lighting conditions inside the cover, which facilitates the accurate acquisition of image information by the AOI optical equipment.

[0016] Meanwhile, when the isolation identification cover is lowered, the retractable bottom sealing mechanism contacts the surface of the rotating platform to seal the gap between the isolation identification cover and the rotating platform, thus achieving a better isolation effect. The retractable bottom sealing mechanism consists of several sliding plates that can slide up and down. It can slide up after contacting the rotating platform, ensuring the sealing effect without applying too much downward pressure to the rotating platform, which can extend the life of the rotating platform.

[0017] In addition, the device has loading and unloading stations and inspection stations on the workbench. The rotating table can rotate the two sets of board positioning devices installed on it between the two stations. That is, while the isolation identification cover is collecting and identifying data, the staff can disassemble and install the PCBA board at the loading and unloading station, so that the inspection and disassembly and assembly processes can be carried out simultaneously, keeping the isolation identification cover in working condition at all times, greatly shortening the cycle of the entire inspection process and significantly improving inspection efficiency. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the isolation identification cover of this utility model in the raised state;

[0021] Figure 3 This is a schematic diagram of the isolation identification cover structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the retractable bottom sealing mechanism of this utility model;

[0023] Figure 5 This is a schematic diagram of the storage box structure of this utility model.

[0024] In the diagram: 1. Workbench; 2. Rotating platform; 3. Plate positioning device; 4. Support plate; 5. Hydraulic lifting mechanism; 51. Cantilever plate; 52. Hydraulic cylinder; 53. Guide rod; 6. Isolation identification cover; 61. Cover; 62. AOI optical equipment; 63. Fill light; 64. Light shield; 65. Removable baffle; 7. Storage box; 71. Box body; 72. Partition; 73. Mounting plate; 74. Adsorption magnetic sheet; 8. PCBA board; 9. Telescopic bottom sealing mechanism; 91. Positioning guide cylinder; 92. Sliding plate; 93. Telescopic groove; 94. Reset spring; 95. Anti-detachment cover plate. Detailed Implementation

[0025] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0026] like Figure 1 - Figure 3As shown, this embodiment provides a PCBA crack intelligent identification device based on before-and-after value comparison, including a workbench 1, with a loading and unloading station at the front and an inspection station at the rear, and a rotatable rotating platform 2 installed on it. Two sets of board positioning devices 3, corresponding to the loading and unloading station and the inspection station respectively, are installed on the rotating platform 2 for mounting PCBA boards 8. A support plate 4 is located at the inspection station of the workbench 1 and is equipped with a hydraulic lifting mechanism 5. An isolation identification cover 6 is installed at the bottom of the hydraulic lifting mechanism 5 and can move up and down under the drive of the hydraulic lifting mechanism 5. The isolation identification cover 6 includes a housing 61, inside which a centrally located AOI optical device is installed. 62, and symmetrically arranged supplementary lights 63 are installed on both sides of the AOI optical equipment 62. The housing 61 can isolate the internal AOI optical equipment 62 from the outside world, avoiding the impact of changes in ambient light on the accuracy of its image acquisition. The supplementary lights 63 can ensure good lighting conditions inside the housing 61, which is conducive to the accurate acquisition of image information by the AOI optical equipment 62. In addition, the rotating table 2 can cyclically alternate between the two sets of board positioning devices 3 installed on it between the two workstations. That is, while the isolation identification cover 6 is performing acquisition and identification, the staff can complete the disassembly and installation of PCBA board 8 at the loading and unloading workstation, thereby greatly shortening the cycle of the entire inspection process and significantly improving the inspection efficiency.

[0027] The AOI optical device 62 and the supplementary light 63 are equipped with a light-shielding plate 64, which consists of a curved panel with the supplementary light 63 as its central axis and a connecting plate. This structure can prevent the light emitted from the supplementary light 63 from directly illuminating the AOI optical device 62 and affecting its acquisition effect. Figure 3 As shown; in addition, detachable baffles 65 connected by bolts are installed at both the front and rear ends of the housing 61, and their edges fit against the inner wall of the housing 61. The above structure can seal the housing 61 and block external light. At the same time, its easy disassembly feature allows it to be quickly removed during maintenance, facilitating the maintenance and replacement of the AOI optical equipment 62 and the supplementary light 63 inside the housing 61. Figure 3 As shown.

[0028] The retractable bottom sealing mechanism 9 is installed at the bottom of the isolation identification cover 6 and fits against the surface of the rotating platform 2 when the isolation identification cover 6 is lowered. The retractable sealing mechanism 9 includes a positioning guide cylinder 91 and a sliding plate 92. The sliding plate 92 has a telescopic groove 93 for sliding connection with the positioning guide cylinder 91. Furthermore, an anti-detachment cover plate 95 is installed on the positioning guide cylinder 91, which adheres to the surface of the sliding plate 92. The sliding plate 92 has an inverted L-shaped cross-section. This design allows for the sliding installation of the sliding plate 92. When its bottom end is in contact with the surface of the rotating platform 2, it slides upwards under the reaction force, ensuring a sealing effect without applying excessive downward pressure to the rotating platform 2, thus extending the lifespan of the rotating platform 2. Additionally, a reset spring 94, made of elastic material and bonded to the groove wall of the telescopic groove 93, is fixedly installed inside the telescopic groove 93, contacting the bottom end of the positioning guide cylinder 91. When the sliding plate 92 slides upwards, it stretches the reset spring 94, deforming and accumulating elastic potential energy. This reset spring 94 then applies downward pressure to the sliding plate 92, ensuring a tight fit with the surface of the rotating platform 2. Figure 4 As shown.

[0029] The hydraulic lifting mechanism 5 includes a cantilever plate 51 mounted on a support plate 4, on which a hydraulic cylinder 52 is installed. The output shaft of the hydraulic cylinder 52 is bolted to a cover 61. Two symmetrically arranged guide rods 53 are slidably mounted on the cantilever plate 51, and their bottom ends are fixedly connected to the cover 61. This structure allows the cover 61 to move up and down via the hydraulic cylinder 52. When the cover 61 is raised, the plate positioning device 3 can smoothly enter directly below it. During testing, the cover 61 moves down to cover the corresponding plate positioning device 3, isolating and sealing the sampling environment. Figure 2 As shown.

[0030] like Figure 1 As shown, storage boxes 7 are provided on both sides of the workbench 1. One storage box 7 is used to store qualified PCBA boards 8, and the other storage box 7 is used to store unqualified PCBA boards 8. The above structure can classify and store qualified and unqualified PCBA boards 8 respectively.

[0031] The storage box 7 includes a main body 71, the interior of which is divided by partitions 72 to form several storage slots. A mounting plate 73 is fixedly mounted on the back of the main body 71, on which several magnetic adsorption sheets 74 are embedded. This structure allows for the neat storage of multiple PCBA boards 8. Simultaneously, the magnetic adsorption sheets 74 can adsorb and mount the storage box 7 onto the workbench 1, facilitating the removal of the entire storage box 7 and the transfer of the stored PCBA boards 8 to a designated location, such as... Figure 5 As shown.

[0032] The working principle and usage process of this utility model:

[0033] The crack recognition device collects and compares image information through an isolation recognition cover 6, which includes a cover 61. An AOI optical device 62 and a supplementary light 63 are installed in the cover 61. The cover 61 can isolate the internal AOI optical device 62 from the outside world, avoiding the impact of changes in ambient light on the accuracy of its image acquisition. The supplementary light 63 can ensure good lighting conditions inside the cover 61, which facilitates the accurate acquisition of image information by the AOI optical device 62.

[0034] When the isolation identification cover 6 is lowered, the retractable bottom sealing mechanism 9 contacts the surface of the rotating platform 2 to seal the gap between the isolation identification cover 6 and the rotating platform 2, thereby achieving a better isolation effect. The retractable bottom sealing mechanism 9 is composed of several sliding plates 92 that can slide up and down. It can slide up after contacting the rotating platform 2, ensuring the sealing effect without applying too much downward pressure to the rotating platform 2, thus extending the life of the rotating platform 2.

[0035] Meanwhile, the device has a loading / unloading station and a testing station on the workbench 1. The rotating table 2 can rotate the two sets of board positioning devices 3 installed on it between the two stations. That is, while the isolation identification cover 6 is collecting and identifying data, the staff can disassemble and install the PCBA board 8 at the loading / unloading station, so that the testing and disassembly / assembly processes can be carried out simultaneously, keeping the isolation identification cover 6 in working condition at all times, greatly shortening the cycle of the entire testing process and significantly improving testing efficiency.

[0036] To ensure that the plate positioning device 3 does not collide with the cover 61 when the rotating platform 2 drives the plate positioning device 3 to rotate, the cover 61 is driven up and down by the hydraulic cylinder 52. When the cover 61 is lifted up, the plate positioning device 3 can smoothly enter directly below it. During the test, the cover 61 moves down to cover the corresponding plate positioning device 3, thus isolating and sealing the sampling environment.

[0037] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A PCBA crack intelligent identification device based on before-and-after value comparison, characterized in that, include: The workbench (1) has a loading and unloading station on the front and an inspection station on the rear. It is equipped with a rotatable turntable (2). The turntable (2) is equipped with two sets of board positioning devices (3) corresponding to the loading and unloading station and the inspection station, respectively, which are used to install PCBA boards (8). Support plate (4) is set at the inspection station and a hydraulic lifting mechanism (5) is installed on it. An isolation identification cover (6) is installed at the bottom of the hydraulic lifting mechanism (5) and can move up and down under the drive of the hydraulic lifting mechanism (5); The retractable bottom sealing mechanism (9) is installed at the bottom of the isolation identification cover (6) and fits against the surface of the rotating platform (2) when the isolation identification cover (6) is lowered; The isolation identification cover (6) includes a cover (61), inside which an AOI optical device (62) is installed in the center, and supplementary lights (63) are installed on both sides of the AOI optical device (62).

2. The PCBA crack intelligent identification device based on before-and-after value comparison according to claim 1, characterized in that: The retractable bottom sealing mechanism (9) includes a positioning guide tube (91) and a sliding plate (92). The sliding plate (92) has a telescopic groove (93) for sliding connection with the positioning guide tube (91). In addition, the positioning guide tube (91) is equipped with an anti-detachment cover plate (95) that fits against the surface of the sliding plate (92). The sliding plate (92) has an inverted L-shaped cross section.

3. The PCBA crack intelligent identification device based on before-and-after value comparison according to claim 2, characterized in that: The telescopic groove (93) is fixedly provided with a reset spring (94) that contacts the bottom end of the positioning guide cylinder (91). The spring (94) is made of elastic material and its two ends are bonded to the groove wall of the telescopic groove (93).

4. The PCBA crack intelligent identification device based on before-and-after value comparison according to claim 1, characterized in that: The AOI optical device (62) and the fill light (63) are provided with a light shield (64), which consists of a curved panel with the fill light (63) as the central axis and a connecting plate.

5. The PCBA crack intelligent identification device based on before-and-after value comparison according to claim 1, characterized in that: The cover (61) is equipped with bolted detachable baffles (65) at both the front and rear ends, and their edges are fitted to the inner wall of the cover (61).

6. The PCBA crack intelligent identification device based on before-and-after value comparison according to claim 1, characterized in that: The hydraulic lifting mechanism (5) includes a cantilever plate (51) mounted on a support plate (4), on which a hydraulic cylinder (52) is mounted, and the output shaft end of the hydraulic cylinder (52) is bolted to the cover (61). Two symmetrically arranged guide rods (53) are slidably mounted on the cantilever plate (51), and their bottom ends are fixedly connected to the cover (61).

7. The PCBA crack intelligent identification device based on before-and-after value comparison according to claim 1, characterized in that: The workbench (1) is provided with storage boxes (7) on both sides. One storage box (7) is used to store qualified PCBA boards (8) and the other storage box (7) is used to store unqualified PCBA boards (8).

8. The PCBA crack intelligent identification device based on before-and-after value comparison according to claim 7, characterized in that: The storage box (7) includes a box body (71), which is divided into several storage slots by partitions (72). An installation plate (73) is fixedly installed on the back of the box body (71), and several magnetic adsorption sheets (74) are embedded thereon.

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