PCB surface crack detection device

Abstract

The utility model discloses a PCB board surface crack detection device, relates to the PCB board crack detection field, and comprises a detection bench, the detection bench is provided with a clamping mechanism, two sides of the clamping mechanism are provided with fixing members, the fixing members are fixedly arranged on the top of the detection bench, the fixing members are internally provided with fixing blocks in a sliding manner, and the fixing blocks are fixedly arranged on the top of the detection bench. An air cylinder is further mounted at the top of the detection table and located on one side of the fixing piece; the air cylinder is started, the telescopic end of the air cylinder pushes the fixing block to slide in the sliding groove, then the gear is driven by the connecting piece to gradually get close to the incomplete rack, and when the gear and the incomplete rack are in complete tooth meshing, the clamping mechanism is driven to rotate by an angle; according to the invention, the detection accuracy is improved, the product quality is ensured, manual overturning is not needed in the whole process, the labor intensity of workers is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB board crack detection, in particular to a PCB board surface crack detection device. Background Art

[0002] PCBs, as key components of electronic devices, carry circuit connections and signal transmission functions. Their quality directly impacts the performance and reliability of the entire electronic product. Therefore, comprehensive PCB quality inspection, particularly surface crack detection, is crucial for ensuring product quality and production efficiency during the production process. Consequently, a PCB surface crack detection device has emerged. This device typically uses machine vision to determine PCB quality by comparing visual inspection with a standard template. During inspection, the PCB is secured with a fixture to prevent misalignment during testing.

[0003] For example, an existing patent (publication number: CN218885779U) discloses a device for detecting cracks on the surface of a PCB board. The device cleans the surface of the PCB board through a wiping mechanism, thereby exposing the cracks on the surface of the PCB board. This allows visual inspection to capture the surface cracks of the PCB board, thereby improving the detection effect.

[0004] However, the aforementioned PCB surface crack detection device still has some shortcomings in actual use. Typically, crack detection on both sides of a PCB is required, but this device can only perform single-sided detection. If only single-sided detection is performed, cracks or microcracks on the other side may be overlooked. These hidden cracks may have a serious impact on the performance of the PCB and affect the comprehensiveness and accuracy of the detection.

[0005] To this end, we designed a PCB surface crack detection device to solve the above problems. Utility Model Content

[0006] The purpose of the present invention is to provide a device for detecting cracks on the surface of a PCB board, so as to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the utility model provides a PCB board surface crack detection device, including a detection platform, a clamping mechanism is installed on the detection platform, and fixing parts are installed on both sides of the clamping mechanism. The fixing part is fixedly installed on the top of the detection platform, and a fixing block is slidably arranged in the fixing part. A cylinder is also installed on the top of the detection platform and is located on one side of the fixing part. The telescopic end of the cylinder is fixedly connected to one side of the fixing block. A connecting part is inserted in the fixing block, one end of the connecting part is fixedly sleeved with a gear, and the other end of the connecting part is fixedly connected to the clamping mechanism. A broken rack is also fixedly installed on one side of the fixing part, and the broken rack is engaged with the gear. A clamping assembly is also movably arranged on the detection platform.

[0008] Furthermore, a slide groove is provided on the top of the fixing member, and the lower end of the fixing block is slidably inserted into the slide groove. The setting of the slide groove prevents the fixing block from having motion interference during movement.

[0009] Furthermore, the clamping assembly includes two clamping parts that are slidably arranged on the front side of the clamping mechanism, the clamping parts are arranged above the detection table, a threaded rod is rotatably arranged in the clamping part, a nut is threadedly connected to the threaded rod, and a moving part is fixedly connected to one side of the clamping part, the moving part is slidably arranged on one side of the clamping part, a cavity is also opened in the clamping part, a motor is fixedly arranged in the cavity, the motor is rotatably connected to the threaded rod, and the setting of the threaded rod can be clamped according to the specific size of the PCB board, so that the clamping is more stable.

[0010] Furthermore, a sliding opening is provided on one side of the clamping member, and the movable member is slidably inserted into the sliding opening. The movable member is slidably arranged above the detection platform. The setting of the sliding opening prevents the movable member from being biased during movement.

[0011] Furthermore, a stopper is fixedly installed on one side away from one end of the motor, and the stopper cooperates with the moving part. The mutual cooperation between the stopper and the moving part can make the PCB board more stable when clamping, so as to maintain its stability during subsequent flipping.

[0012] Furthermore, a buffer pad is fixedly installed on the top of the testing table. The setting of the buffer pad can protect the PCB board after it is turned over and provide a buffer for it to a certain extent.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The detection device of the present application starts the cylinder, and the telescopic end of the cylinder pushes the fixed block to slide in the slide groove, and then drives the gear to gradually approach the incomplete rack through the connecting piece. When the gear and the incomplete rack are fully meshed, it will drive the clamping mechanism to rotate one degree, that is, the PCB board is flipped to the other side and then the machine vision inspection of the other side is carried out, which improves the accuracy of the inspection and ensures the quality of the product. There is no need for manual flipping by personnel throughout the process, which reduces the labor intensity of workers and improves work efficiency.

[0015] 2. By opening the clamping mechanism, the two clamping parts are brought close to each other and abut against the two sides of the PCB board for clamping. Turn on the motor, and the driving end of the motor drives the threaded rod to rotate so that the two ends of the PCB board are respectively abutted against the side opposite to the moving part and the sliding port, which can effectively clamp the PCB board and improve the clamping stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall external structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the clamping member of the utility model;

[0018] Figure 3 This is a top view of the overall external structure of the utility model.

[0019] In the figure: 1. Testing table; 2. Clamping mechanism; 3. Fixing part; 4. Fixing block; 5. Connecting part; 6. Gear; 7. Incomplete rack; 8. Slide; 9. Clamping part; 10. Threaded rod; 11. Cavity; 12. Motor; 13. Nut; 14. Moving part; 15. Slide; 16. Stop block; 17. Cylinder; 18. Buffer pad. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-3The utility model provides a technical solution: a PCB board surface crack detection device, including a detection platform 1, a clamping mechanism 2 is installed on the detection platform 1, and fixing parts 3 are installed on both sides of the clamping mechanism 2. The fixing part 3 is fixedly installed on the top of the detection platform 1, and a fixing block 4 is slidably provided in the fixing part 3. A cylinder 17 is also installed on the top of the detection platform 1 and is located on one side of the fixing part 3. The telescopic end of the cylinder 17 is fixedly connected to one side of the fixing block 4, and a connecting part 5 is inserted in the fixing block 4. One end of the connecting part 5 is fixedly sleeved with a gear 6, and the other end of the connecting part 5 is fixedly connected to the clamping mechanism 2. A broken rack 7 is also fixedly installed on one side of the fixing part 3, and the broken rack 7 is engaged with the gear 6. A clamping assembly is also movably provided on the detection platform 1.

[0022] A sliding groove 8 is provided on the top of the fixing member 3 , and the lower end of the fixing block 4 is slidably inserted into the sliding groove 8 .

[0023] The clamping assembly includes two clamping parts 9 that are slidably arranged on the front side of the clamping mechanism 2. The clamping part 9 is arranged above the detection platform 1. A threaded rod 10 is rotatably arranged in the clamping part 9. A nut 13 is threadedly connected to the threaded rod 10. A moving part 14 is also fixedly connected to one side of the clamping part 9. The moving part 14 is slidably arranged on one side of the clamping part 9. A cavity 11 is also provided in the clamping part 9. A motor 12 is fixedly arranged in the cavity 11. The motor 12 is rotatably connected to the threaded rod 10.

[0024] A stopper 16 is fixedly mounted on one side away from one end of the motor 12 , and the stopper 16 cooperates with the moving member 14 for operation.

[0025] When the PCB is turned on, the two ends of the PCB are respectively against the opposite sides of the moving part 14 and the sliding port 15, and the PCB is effectively clamped to avoid the problem of shaking and biasing during the subsequent flipping operation. Then, machine vision inspection can be carried out. When the first side inspection is completed, the cylinder 17 is started, and the driving end of the cylinder 17 pushes the fixed block 4 to slide in the slide groove 8, and then drives the gear 6 to gradually approach the incomplete rack 7 through the connecting member 5. Due to the intermittent meshing design of the gear 6 and the incomplete rack 7, when the gear 6 and the incomplete rack 7 perform a complete tooth meshing, it will drive the clamping mechanism 2 to rotate 180 degrees, that is, the PCB board is flipped to the other side and then the machine vision inspection of the other side is carried out.

[0026] See Figure 1-3As shown, a sliding opening 15 is provided on one side of the clamping member 9, and the moving member 14 is slidably inserted into the sliding opening 15. The moving member 14 is slidably arranged above the detection platform 1. The setting of the sliding opening 15 ensures that the moving member 14 will not be biased during the movement process.

[0027] See Figure 1-3 A buffer pad 18 is also fixedly installed on the top of the test table 1. The setting of the buffer pad 18 can protect the PCB board after the flipping and provide a buffer for it to a certain extent.

[0028] Furthermore, it should be noted that a high-resolution camera, laser scanner, or other optical inspection equipment is typically installed above or around the inspection platform 1 to meticulously scan and analyze the PCB surface. During the inspection process, any cracks or defects are captured and marked, subsequently recorded or an alarm is issued. The cushioning pad 18 is made of rubber, a material known for its excellent elasticity, effectively mitigating impact forces on objects and providing excellent cushioning. Rubber also exhibits excellent wear resistance, temperature resistance, corrosion resistance, and aging resistance.

[0029] Working principle: Before the equipment is started, the cylinder 17 is in a retracted state. At this time, the gear 6 and the incomplete rack 7 are not in a meshing state. Then the PCB board to be tested is placed on the test table 1 between the two clamping members 9. Then the clamping mechanism 2 is turned on so that the two clamping members 9 are close to each other and abut against the two sides of the PCB board for clamping. Then the motor 12 is turned on. The driving end of the motor 12 drives the threaded rod 10 to rotate. The moving member 14 moves to one side of the stopper 16 and makes the two ends of the PCB board respectively abut against the opposite side of the moving member 14 and the sliding port 15. At this time, the PCB board can be tested. An effective clamping is performed to avoid the problem of shaking and bias during the subsequent flipping operation. Then, machine vision inspection can be carried out. When the first side inspection is completed, the cylinder 17 is started, and the driving end of the cylinder 17 pushes the fixed block 4 to slide in the slide groove 8, and then drives the gear 6 to gradually approach the incomplete rack 7 through the connecting piece 5. Due to the intermittent meshing design of the gear 6 and the incomplete rack 7, when the gear 6 and the incomplete rack 7 perform a complete tooth meshing, it will drive the clamping mechanism 2 to rotate 180°, that is, flip the PCB board to the other side and then perform machine vision inspection on the other side.

[0030] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A PCB surface crack detection device, comprising a detection platform (1), wherein a clamping mechanism (2) is mounted on the detection platform (1), and characterized in that: Both sides of the clamping mechanism (2) are equipped with fixing members (3), the fixing members (3) are fixedly installed on the top of the test bench (1), a fixing block (4) is slidably provided in the fixing member (3), a cylinder (17) is also installed on the top of the test bench (1), and is located on one side of the fixing member (3), the telescopic end of the cylinder (17) is fixedly connected to one side of the fixing block (4), a connecting member (5) is inserted into the fixing block (4), one end of the connecting member (5) is fixedly sleeved with a gear (6), and the other end of the connecting member (5) is fixedly connected to the clamping mechanism (2), one side of the fixing member (3) is also fixedly equipped with a broken rack (7), the broken rack (7) is meshed with the gear (6), and a clamping assembly is also movably provided on the test bench (1).

2. A PCB surface crack detection device according to claim 1, characterized in that: A sliding groove (8) is provided on the top of the fixing member (3), and the lower end of the fixing block (4) is slidably inserted into the sliding groove (8).

3. The PCB surface crack detection device according to claim 1, wherein: The clamping assembly comprises two clamping members (9) slidably arranged on the front side of the clamping mechanism (2), the clamping member (9) being arranged above the detection table (1), a threaded rod (10) being rotatably arranged in the clamping member (9), a nut (13) being threadedly connected to the threaded rod (10), and a moving member (14) being fixedly connected to one side of the threaded rod (10), the moving member (14) being slidably arranged on one side of the clamping member (9), a cavity (11) being further provided in the clamping member (9), a motor (12) being fixedly arranged in the cavity (11), and the motor (12) being rotatably connected to the threaded rod (10).

4. A PCB surface crack detection device according to claim 3, characterized in that: A sliding opening (15) is provided on one side of the clamping member (9), and the moving member (14) is slidably inserted into the sliding opening (15). The moving member (14) is slidably arranged above the detection platform (1).

5. The PCB surface crack detection device according to claim 3, wherein: A stopper (16) is fixedly mounted on a side away from one end of the motor (12), and the stopper (16) cooperates with the moving part (14) to operate.

6. The PCB surface crack detection device according to claim 1, wherein: A buffer pad (18) is also fixedly mounted on the top of the testing platform (1).

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