Visual scanning detection device for solder skips of solder joints of PCB (Printed Circuit Board)

Abstract

The utility model belongs to the technical field of PCB (printed circuit board) welding spot detection, and particularly relates to a PCB welding spot missing visual scanning detection device which comprises a base, a first conveying assembly and a second conveying assembly, the first conveying assembly comprises two first supporting plates, a first material guide plate is rotatably mounted on the first supporting plates, a hydraulic cylinder is rotatably connected onto a mounting plate through a hinge seat, and a second material guide plate is rotatably connected onto the hydraulic cylinder through a hinge seat. A hydraulic rod is rotationally connected with the bottom side of a first material guide plate through a hinge seat, a third guide plate is fixedly installed on a third supporting plate in a third conveying assembly, and when welding spots of a PCB are detected to be unqualified, the hydraulic rod can drive the first material guide plate to turn downwards till the first material guide plate makes contact with the third guide plate, so that the welding spots of the PCB are detected to be unqualified; according to the PCB sorting device, the first guide plate is arranged on the first conveying belt, then the PCBs slide to the third guide plate along the first guide plate, and then slide to the third conveying belt from the third guide plate, so that unqualified PCBs are conveyed, the PCBs are sorted, the PCBs can be quickly sorted according to detection results, and the PCB sorting convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of PCB board solder joint detection technology, specifically a visual scanning detection device for missing solder joints on PCB boards. Background Technology

[0002] PCB boards are important components in the electronics industry. Also known as printed circuit boards, they serve as the support for electronic components. Conductive copper foil is patterned and laid on the surface of insulating material to achieve electrical connections between electronic components. After the PCB board is manufactured, a solder joint leakage visual scanning inspection device is needed to detect whether there are any missing solder joints.

[0003] Chinese patent CN 218629573 U discloses a PCB board solder joint visual defect detection platform, comprising a platform body, an industrial camera, and a clamping mechanism. The platform body includes a base and a top platform, which are connected as a single unit. The industrial camera is mounted on the top platform facing the base. The clamping mechanism is mounted on the side wall of the base and includes a lifting screw, a rotating mechanism, a first gripper, and a second gripper. The lifting screw is vertically mounted on the side wall of the base, and the rotating mechanism is connected to the output end of the lifting screw. The first and second grippers are mirror-symmetrically mounted on both sides of the output end of the rotating mechanism. The lifting screw drives the rotating mechanism to synchronously raise and lower, adjusting the height of the PCB board to ensure the industrial camera can smoothly identify and inspect the PCB board, thus ensuring detection accuracy.

[0004] Existing visual scanning inspection devices for missing solder joints have difficulty quickly sorting out PCBs that fail the inspection during the scanning process, resulting in poor ease of PCB sorting. Therefore, a visual scanning inspection device for missing solder joints on PCBs is proposed to address the above problem. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve the problems existing in existing technologies, this utility model proposes a visual scanning detection device for solder joint leakage on PCB boards.

[0006] The technical solution adopted by this utility model to solve its technical problem is a visual scanning detection device for solder joint leakage on PCB boards, including a base, on which a first leg is mounted, and on which a first conveying assembly is mounted, the first conveying assembly including two first support plates. A second leg is mounted on the base, and on which a second conveying assembly and a third conveying assembly are mounted. The second and third conveying assemblies have the same structure as the first conveying assembly. A first guide plate is rotatably mounted on the first support plate, and an mounting plate is mounted on the first leg. A hydraulic cylinder is rotatably connected to the mounting plate via a hinge, and a hydraulic rod is mounted on the hydraulic cylinder. The hydraulic rod is rotatably connected to the bottom side of the first guide plate via a hinge. A second guide plate is fixedly mounted on the second support plate within the second conveying assembly, and a third guide plate is fixedly mounted on the third support plate within the third conveying assembly. The first support plate rotates... The system is equipped with a first rotating shaft and a second rotating shaft. A first drive motor is mounted on the side wall of the first support plate via a base. The output shaft of the first drive motor is fixedly connected to the first rotating shaft. Rollers are fixedly fitted on the first and second rotating shafts. A first conveyor belt is fitted around the two sets of rollers. A first sprocket and a second sprocket are fixedly fitted on the first and second rotating shafts, respectively. A chain is fitted on both the first and second sprockets. When the solder joints of the PCB board are found to be defective, a hydraulic rod will drive the first guide plate to flip downwards until the first guide plate contacts the third guide plate. Then, the PCB board slides along the first guide plate onto the third guide plate, and then slides from the third guide plate onto the third conveyor belt. This achieves the conveying of defective PCB boards and the sorting of PCB boards. This structure can quickly sort PCB boards according to the detection results, which is beneficial to improving the convenience of sorting PCB boards.

[0007] Preferably, a rod seat is mounted on the first support plate. The rod seat has a threaded hole and multiple guide holes. A lead screw is fitted into the threaded hole. A knob is mounted on one end of the lead screw, and a limit plate is rotatably mounted on the other end of the lead screw. Multiple guide rods are mounted on the limit plate, and the guide rods pass through the guide holes. The limit plate is located above the first conveyor belt. Multiple push plates are mounted on the first conveyor belt, and a PCB board is placed on the first conveyor belt. An industrial control computer is mounted on the base via a fixed platform, and an industrial camera is mounted on the base via a fixed bracket. By rotating the knob, the lead screw is driven to rotate. While rotating, the lead screw moves horizontally on the rod seat, driving the limit plate to move horizontally. The guide rods guide the limit plate horizontally, achieving stable movement of the limit plate. The distance between the two limit plates is adjusted according to the width of the PCB board, thereby adjusting the width of the feeding channel. This allows the PCB board to move accurately below the industrial camera. This structure can detect PCB boards of different specifications, which is beneficial to improving the adaptability of the device.

[0008] The advantages of this utility model are:

[0009] 1. This utility model achieves the conveying and sorting of defective PCB boards by using a hydraulic rod to drive the first guide plate downwards when the solder joints of the PCB board are found to be unqualified, until the first guide plate contacts the third guide plate. Then the PCB board slides along the first guide plate onto the third guide plate, and then slides from the third guide plate onto the third conveyor belt. This structure can quickly sort PCB boards according to the detection results, which is beneficial to improving the convenience of sorting PCB boards.

[0010] This invention uses a knob to rotate a lead screw, which moves horizontally on a support while rotating. The lead screw drives a limiting plate to move horizontally, and a guide rod guides the limiting plate horizontally, achieving stable movement of the limiting plate. The distance between the two limiting plates can be adjusted according to the width of the PCB board, thus adjusting the width of the feeding channel. This allows the PCB board to be accurately moved under the industrial camera. This structure can detect PCB boards of different specifications, which helps improve the adaptability of the device. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a first-person perspective 3D structural diagram;

[0013] Figure 2 This is a schematic diagram of the three-dimensional structure at the first conveyor belt.

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure at the first guide plate.

[0015] Figure 4 This is a schematic diagram of the three-dimensional structure at the third guide plate.

[0016] Figure 5 This is a schematic diagram of the three-dimensional structure at the limiting plate.

[0017] In the diagram: 1. Base; 2. First leg; 3. First support plate; 4. First rotating shaft; 5. Second rotating shaft; 6. First drive motor; 7. Roller; 8. First conveyor belt; 9. Second leg; 10. Second conveyor assembly; 11. Third conveyor assembly; 12. First guide plate; 13. Hydraulic cylinder; 14. Hydraulic rod; 15. Second guide plate; 16. Third guide plate; 17. Rod seat; 18. Lead screw; 19. Knob; 20. Limit plate; 21. Guide rod; 22. Push plate; 23. PCB board; 24. Industrial computer; 25. Industrial camera; 26. First sprocket; 27. Second sprocket; 28. Chain. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] Please see Figure 1-4As shown, a visual scanning detection device for solder joint defects on a PCB board includes a base 1, a first leg 2 mounted on the base 1, a first conveying assembly mounted on the first leg 2, the first conveying assembly including two first support plates 3, a second leg 9 mounted on the base 1, a second conveying assembly 10 and a third conveying assembly 11 mounted on the second leg 9, the second conveying assembly 10 and the third conveying assembly 11 having the same structure as the first conveying assembly, a first guide plate 12 rotatably mounted on the first support plate 3, and a mounting plate mounted on the first leg 2, with a hydraulic cylinder 1 rotatably connected to the mounting plate via a hinge. 3. A hydraulic rod 14 is mounted on the hydraulic cylinder 13. The hydraulic rod 14 is rotatably connected to the bottom side of the first guide plate 12 via a winch. A second guide plate 15 is fixedly mounted on the second support plate inside the second conveying assembly 10. A third guide plate 16 is fixedly mounted on the third support plate inside the third conveying assembly 11. A first rotating shaft 4 and a second rotating shaft 5 are rotatably mounted on the first support plate 3. A first drive motor 6 is mounted on the side wall of the first support plate 3 via a machine base. The output shaft of the first drive motor 6 is fixedly connected to the first rotating shaft 4. Rollers are fixedly sleeved on the first rotating shaft 4 and the second rotating shaft 5. 7. A first conveyor belt 8 is sleeved around the two sets of rollers 7. A first sprocket 26 and a second sprocket 27 are respectively fixedly sleeved on the first rotating shaft 4 and the second rotating shaft 5. A chain 28 is sleeved on both the first sprocket 26 and the second sprocket 27. During operation, the existing visual scanning detection device for missing solder joints has difficulty quickly sorting out the PCB boards 23 that fail the inspection during the scanning and detection process of the PCB board 23, resulting in poor convenience for the device to sort the PCB boards 23. By placing the PCB board 23 on the first conveyor belt 8, the first conveying component operates, that is, through the first drive electric... When machine 6 operates, it drives the first rotating shaft 4 to rotate, which in turn drives the first sprocket 26 to rotate. The first sprocket 26 then drives the chain 28 to rotate, which in turn drives the second sprocket 27 to rotate. The second sprocket 27 then drives the second rotating shaft 5 to rotate. In other words, the first rotating shaft 4 and the second rotating shaft 5 rotate synchronously. The first rotating shaft 4 and the second rotating shaft 5 drive the two sets of rollers 7 to rotate synchronously, which in turn drive the first conveyor belt 8 to rotate, thus realizing the rotation of the first conveyor belt 8. Similarly, the second conveyor assembly 10 and the third conveyor assembly 11 operate, thus realizing the rotation of the second and third conveyor belts.

[0020] The first conveyor belt 8 rotates, transporting the PCB board 23 to below the industrial camera 25. The industrial camera 25 captures images of the solder joints on the PCB board 23 and sends electrical signals to the industrial computer 24. The industrial computer 24 uses image processing algorithms to analyze the solder joint quality, realizing fast and accurate detection of missing solder joint defects on the PCB board 23. The detection results can be displayed on the screen of the industrial computer 24.

[0021] When the solder joints of PCB board 23 are found to be qualified, the first conveyor belt 8 transports PCB board 23 onto the first guide plate 12. Then, PCB board 23 slides along the first guide plate 12 onto the second guide plate 15, and then slides from the second guide plate 15 onto the second conveyor belt, thus realizing the transport of qualified PCB board 23.

[0022] When the solder joints of PCB board 23 fail the inspection, the control system inside the industrial computer 24 will control the hydraulic cylinder 13 to operate. The hydraulic rod 14 will drive the first guide plate 12 to flip downwards until the first guide plate 12 contacts the third guide plate 16. Then, the PCB board 23 slides along the first guide plate 12 onto the third guide plate 16, and then slides from the third guide plate 16 onto the third conveyor belt, realizing the conveying of the unqualified PCB board 23 and the sorting of the PCB board 23. This structure can quickly sort the PCB board 23 according to the inspection results, which is beneficial to improving the convenience of sorting the PCB board 23.

[0023] Please see Figure 5 As shown, a rod seat 17 is installed on the first support plate 3. The rod seat 17 has a threaded hole and multiple guide holes. A lead screw 18 is installed in the threaded hole. A knob 19 is installed at one end of the lead screw 18, and a limit plate 20 is rotatably installed at the other end of the lead screw 18. Multiple guide rods 21 are installed on the limit plate 20, and the guide rods 21 pass through the guide holes. The limit plate 20 is located above the first conveyor belt 8. Multiple push plates 22 are installed on the first conveyor belt 8. A PCB board 23 is placed on the first conveyor belt 8. An industrial control computer 24 is installed on the base 1 via a fixed platform, and an industrial camera 25 is installed on the base 1 via a fixed bracket. During operation, the feeding structure in the existing solder joint leakage visual scanning detection device is usually a fixed structure. The original structure made it difficult to adjust the width of the loading channel of PCB board 23 according to its specifications, resulting in poor adaptability of the device. By rotating the knob 19, the lead screw 18 is driven to rotate. While rotating, the lead screw 18 moves horizontally on the rod seat 17. The lead screw 18 drives the limiting plate 20 to move horizontally. The guide rod 21 guides the limiting plate 20 horizontally, realizing the stable movement of the limiting plate 20. The distance between the two limiting plates 20 can be adjusted according to the width of PCB board 23, thereby adjusting the width of the loading channel. This allows PCB board 23 to move accurately under the industrial camera 25. This structure can detect PCB boards 23 of different specifications, which helps to improve the adaptability of the device.

[0024] Working principle: Existing visual scanning detection devices for solder joint defects have difficulty quickly sorting out defective PCBs 23 during the scanning and inspection process, resulting in poor ease of sorting. By placing the PCB 23 on the first conveyor belt 8, the first conveying component operates, i.e., the first drive motor 6 operates, driving the first rotating shaft 4 to rotate. The first rotating shaft 4 drives the first sprocket 26 to rotate, the first sprocket 26 drives the chain 28 to rotate, the chain 28 drives the second sprocket 27 to rotate, and the second sprocket 27 drives the second rotating shaft 5 to rotate. That is, the first rotating shaft 4 and the second rotating shaft 5 rotate synchronously. The first rotating shaft 4 and the second rotating shaft 5 drive two sets of rollers 7 to rotate synchronously. The two sets of rollers 7 drive the first... The rotation of conveyor belt 8 enables the rotation of the first conveyor belt 8; similarly, the operation of the second conveyor assembly 10 and the third conveyor assembly 11 enables the rotation of the second and third conveyor belts; the rotation of the first conveyor belt 8 transports the PCB board 23 to below the industrial camera 25, the industrial camera 25 captures images of the solder joints on the PCB board 23 and sends electrical signals to the industrial control computer 24, the industrial control computer 24 uses image processing algorithms to analyze the solder joint quality, realizing fast and accurate detection of missing solder joint defects on the PCB board 23, and the detection results can be displayed on the screen of the industrial control computer 24; when the solder joint detection of the PCB board 23 is qualified, the first conveyor belt 8 transports the PCB board 23 to the first guide plate 12, and then the PCB board 23 slides along the first guide plate 12 to the second guide plate. The PCB board 23 is transported from the second guide plate 15 to the second conveyor belt, thus conveying the qualified PCB board 23. When the solder joint of the PCB board 23 is found to be unqualified, the control system inside the industrial computer 24 controls the hydraulic cylinder 13 to operate. The hydraulic rod 14 drives the first guide plate 12 to flip downwards until the first guide plate 12 contacts the third guide plate 16. Then, the PCB board 23 slides along the first guide plate 12 to the third guide plate 16, and then slides from the third guide plate 16 to the third conveyor belt, thus conveying the unqualified PCB board 23 and realizing the sorting of the PCB board 23. This structure can quickly sort the PCB board 23 according to the detection results, which is beneficial to improving the convenience of sorting the PCB board 23. Existing solder joint defects The feeding structure in a visual scanning inspection device is usually a fixed structure, making it difficult to adjust the width of the feeding channel of the PCB board 23 according to its specifications, resulting in poor device adaptability. By rotating the knob 19, the lead screw 18 is driven to rotate. While rotating, the lead screw 18 moves horizontally on the rod seat 17, which in turn drives the limiting plate 20 to move horizontally. The guide rod 21 guides the limiting plate 20 horizontally, achieving stable movement of the limiting plate 20. The distance between the two limiting plates 20 is adjusted according to the width of the PCB board 23, thereby adjusting the width of the feeding channel. This allows the PCB board 23 to move accurately under the industrial camera 25. This structure can inspect PCB boards 23 of different specifications, which helps improve the adaptability of the device.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A visual scanning detection device for solder joint defects on PCB boards, characterized in that: The system includes a base (1), on which a first leg (2) is mounted, and on which a first conveying assembly is mounted, the first conveying assembly including two first support plates (3). A second leg (9) is mounted on the base (1), and on which a second conveying assembly (10) and a third conveying assembly (11) are mounted. The second conveying assembly (10) and the third conveying assembly (11) have the same structure as the first conveying assembly. A first guide plate (12) is rotatably mounted on the first support plate (3). An mounting plate is mounted on the first leg (2), and a hydraulic cylinder (13) is rotatably connected to the mounting plate via a winch. A hydraulic rod (14) is mounted on the hydraulic cylinder (13), and the hydraulic rod (14) is rotatably connected to the bottom side of the first guide plate (12) via a winch. A second guide plate (15) is fixedly mounted on the second support plate inside the second conveying assembly (10), and a third guide plate (16) is fixedly mounted on the third support plate inside the third conveying assembly (11).

2. The visual scanning inspection apparatus for detecting a missed soldering of a PCB according to claim 1, wherein: A first rotating shaft (4) and a second rotating shaft (5) are rotatably mounted on the first support plate (3). A first drive motor (6) is mounted on the side wall of the first support plate (3) via a base. The output shaft of the first drive motor (6) is fixedly connected to the first rotating shaft (4). Rollers (7) are fixedly sleeved on the first rotating shaft (4) and the second rotating shaft (5). A first conveyor belt (8) is sleeved around the two sets of rollers (7). A first sprocket (26) and a second sprocket (27) are fixedly sleeved on the first rotating shaft (4) and the second rotating shaft (5), respectively. A chain (28) is sleeved on the first sprocket (26) and the second sprocket (27).

3. The visual scanning inspection apparatus for detecting a missed soldering of a PCB according to claim 1, wherein: A rod seat (17) is installed on the first support plate (3). A threaded hole and multiple guide holes are opened on the rod seat (17). A lead screw (18) is installed in the threaded hole. A knob (19) is installed at one end of the lead screw (18). A limit plate (20) is rotatably installed at the other end of the lead screw (18).

4. The visual scanning inspection apparatus for detecting a missed soldering of a PCB according to claim 3, wherein: The limiting plate (20) is equipped with multiple guide rods (21), which pass through guide holes.

5. The visual scanning inspection apparatus for detecting a missed soldering of a PCB board according to claim 3, wherein: The limiting plate (20) is located above the first conveyor belt (8), on which a plurality of push plates (22) are installed, and a PCB board (23) is placed.

6. The apparatus for visual scanning and detecting of a missed solder joint of a PCB board according to claim 1, wherein: An industrial computer (24) is mounted on the base (1) via a fixed platform, and an industrial camera (25) is mounted on the base (1) via a fixed bracket.

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