PCB (Printed Circuit Board) defect visual inspection equipment

Abstract

The utility model provides PCB (Printed Circuit Board) defect visual inspection equipment, which relates to the technical field of PCB detection and comprises a support frame, and a mechanical arm is arranged at the top of the support frame. During use, the conveying belt moves the placing blocks sequentially arranged at the top of the conveying belt towards the lower portion of the mechanical arm, after the placing block located at the forefront portion touches a shifting rod of the travel switch, the conveying belt stops driving, the motor drives the two-way threaded rod to rotate in the forward direction, and the two clamping plates can clamp the current placing block; therefore, the position is centered and fixed, the mechanical arm can conveniently drive the industrial vision camera to carry out defect detection on the centered PCB body, after detection is completed, driving of the conveying belt is recovered, meanwhile, the shifting rod of the travel switch is reset, and the steps are repeated, so that the placement blocks provided with the PCBs can sequentially stay below the mechanical arm. And detection is carried out after the two clamping plates are clamped, centered and positioned, so that the automation degree is high, and the detection efficiency of the PCB defect visual detection equipment is improved.

Description

Technical Field

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

[0002] A PCB (printed circuit board), also known as a printed wiring board, is one of the important components of the electronics industry. Almost every electronic device, from small electronic watches and calculators to computers, communication electronic devices, and military weapon systems, as long as there are electronic components such as integrated circuits, in order to achieve electrical interconnection between each component, a printed circuit board is used. The printed wiring board is composed of an insulating base plate, connecting wires, and pads for assembling and soldering electronic components. It has the dual functions of a conductive circuit and an insulating base plate. It can replace complex wiring to achieve electrical connection between components in the circuit, not only simplifying the assembly and soldering work of electronic products, reducing the wiring workload in the traditional method, greatly reducing the labor intensity of workers, but also reducing the overall volume of the machine, lowering the product cost, and improving the quality and reliability of electronic devices.

[0003] In the prior art, when the PCB circuit connection board is placed below the visual detection device, it requires manual operation by the operator to adjust the placed PCB circuit connection board to be centered. During the detection of a large number of PCB boards, this manual-assisted alignment operation method will greatly reduce the visual detection efficiency of PCB board defects before leaving the factory. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that in the prior art, during the detection of a large number of PCB boards, the manual-assisted alignment operation method will greatly reduce the visual detection efficiency of PCB board defects before leaving the factory, and to propose a visual detection device for PCB board defects.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A visual detection device for PCB board defects, comprising: a support frame, a robotic arm is arranged on the top of the support frame, and a conveyor belt is arranged inside the support frame; a positioning component, the positioning component is arranged on the top of the support frame, the positioning component includes a motor, the motor is fixedly connected to the front surface of the support frame, the output end of the motor rotates through the outer surface of the support frame, the output end of the motor is fixedly connected with a bidirectional threaded rod, moving blocks are symmetrically arranged on the outer surface of the bidirectional threaded rod, the moving blocks are in threaded rotation connection with the bidirectional threaded rod, and clamping plates are fixedly connected to the opposite surfaces of the two moving blocks.

[0006] Preferably, the bidirectional threaded rod is located inside the support frame, and the bidirectional threaded rod is rotationally connected to the support frame.

[0007] Preferably, fixing blocks are fixedly connected to the top of the support frame respectively, and hollow tubes are symmetrically and fixedly connected to the inner surfaces of the two fixing blocks respectively.

[0008] Preferably, sliding rods are symmetrically and fixedly connected to the outer surface of the clamping plate, and the outer surface of the sliding rod is slidably connected to the inner surface of the hollow tube.

[0009] Preferably, protective pads are arranged on the opposite surfaces of the two clamping plates, and the protective pads are rectangular.

[0010] Preferably, placing blocks are arranged on the top of the conveyor belt, rectangular grooves are formed in the top of the placing blocks, and a PCB board body is arranged on the inner surface of the rectangular grooves.

[0011] Preferably, a travel switch is fixedly connected to the top of the support frame, and the travel switch is arranged in a matching manner with the placing block.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0013] 1. In the present utility model, during use, the conveyor belt moves the multiple placing blocks arranged in sequence on its top below the robotic arm. After the placing block at the forefront touches the lever of the travel switch, the conveyor belt stops driving, and the bidirectional threaded rod is driven by the motor to rotate forward, so that the two clamping plates will clamp the current placing block, thereby fixing its position in the middle, which is convenient for the robotic arm to drive the industrial vision camera to detect the defects of the PCB board body in the middle position. After the detection is completed, the conveyor belt resumes driving, and at the same time, the lever of the travel switch resets. In this way, the placing blocks equipped with PCB boards will stop below the robotic arm in sequence, and after being clamped and centered by the two clamping plates, they will be detected. The degree of automation is high, and the detection efficiency of the PCB board defect vision detection device is improved.

[0014] 2. In the present utility model, during use, when the two clamping plates move towards or away from each other, the sliding rods symmetrically and fixedly connected to the outer surface of the clamping plate slide synchronously in the corresponding hollow tubes, playing a role in limiting the position, avoiding the clamping plates from shifting during movement and colliding with the edge of the conveyor belt, which affects the centering and fixing of the PCB board, and improving the stability of the PCB board defect vision detection device. Description of the Drawings

[0015] Figure 1 is a perspective view of a PCB board defect vision detection device proposed by the present utility model;

[0016] Figure 2 is a schematic structural diagram of the positioning component of a PCB board defect vision detection device proposed by the present utility model;

[0017] Figure 3This is a partial structural schematic diagram of a visual inspection device for PCB board defects proposed by the present utility model;

[0018] Figure 4 This is a structural schematic diagram of a placement block of a visual inspection device for PCB board defects proposed by the present utility model.

[0019] Legend: 1, support frame; 2, robotic arm; 3, conveyor belt; 4, travel switch; 5, positioning component; 501, bidirectional threaded rod; 502, motor; 503, moving block; 504, connecting rod; 505, clamping plate; 506, protective pad; 507, fixed block; 508, hollow tube; 509, sliding rod; 6, placement block; 7, rectangular groove; 8, PCB board body. Specific embodiments

[0020] In order to more clearly understand the above objects, features, and advantages of the present utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0021] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0022] Embodiment 1: As Figures 1 - 4 shown, the present utility model provides a visual inspection device for PCB board defects, including: a support frame 1, a robotic arm 2 is arranged on the top of the support frame 1, and a conveyor belt 3 is arranged inside the support frame 1; a positioning component 5, the positioning component 5 is arranged on the top of the support frame 1, the positioning component 5 includes a motor 502, the motor 502 is fixedly connected to the front surface of the support frame 1, the output end of the motor 502 rotates through the outer surface of the support frame 1, the output end of the motor 502 is fixedly connected to a bidirectional threaded rod 501, moving blocks 503 are symmetrically arranged on the outer surface of the bidirectional threaded rod 501, the moving blocks 503 are in threaded rotation connection with the bidirectional threaded rod 501, clamping plates 505 are fixedly connected to the opposite surfaces of the two moving blocks 503, the bidirectional threaded rod 501 is located inside the support frame 1, the bidirectional threaded rod 501 is rotationally connected to the support frame 1, a placement block 6 is arranged on the top of the conveyor belt 3, a rectangular groove 7 is opened on the top of the placement block 6, a PCB board body 8 is arranged on the inner surface of the rectangular groove 7, a travel switch 4 is fixedly connected to the top of the support frame 1, and the travel switch 4 is provided in a matching manner with the placement block 6.

[0023] The effect achieved by the entire Embodiment 1 is that when performing defect visual inspection on a PCB board, first, a batch of PCB board bodies 8 are sequentially placed into the rectangular grooves 7 of multiple placement blocks 6 for preliminary positioning. Then, the placement blocks 6 are sequentially placed above the conveyor belt 3. When the conveyor belt 3 is driven, it will drive multiple placement blocks 6 arranged in sequence on its top to move downward under the robotic arm 2. When the placement block 6 at the forefront touches the lever of the travel switch 4, the travel switch 4 simultaneously sends instructions to the conveyor belt 3 and the motor 502. The conveyor belt 3 stops driving, and the motor 502 starts. Its output end drives the bidirectional threaded rod 501 to rotate clockwise inside the support frame 1. Two moving blocks 503 respectively drive two clamping plates 505 to move towards each other through two connecting rods 504, clamping the placement block 6, thereby fixing its position in the center and preventing excessive position deviation beyond the effective extension range of the robotic arm 2. The robotic arm 2 is started. An industrial vision camera is provided at the installation end of the robotic arm 2. The robotic arm 2 drives the industrial vision camera to perform defect detection on the surface of the PCB board body 8. After the detection is completed, the conveyor belt 3 starts, enabling the current placement block 6 to continue moving, and at the same time, the lever of the travel switch 4 resets. This cycle repeats, causing the placement blocks 6 containing PCB boards to stop sequentially under the robotic arm 2 and be detected after being clamped and centered by the two clamping plates 505. The degree of automation is high, avoiding the need for manual centering and straightening by humans, and improving the detection efficiency of the PCB board defect visual inspection equipment.

[0024] Embodiment 2: As Figures 1 - 4 shown, fixing blocks 507 are respectively fixedly connected to the top of the support frame 1. Hollow tubes 508 are symmetrically and fixedly connected to the inner surfaces of the two fixing blocks 507. Slide rods 509 are symmetrically fixedly connected to the outer surface of the clamping plate 505. The outer surface of the slide rod 509 is slidably connected to the inner surface of the hollow tube 508. Protective pads 506 are provided on the opposite surfaces of the two clamping plates 505, and the protective pads 506 are rectangular in shape.

[0025] The effect achieved by the entire Embodiment 2 is that during use, by respectively providing protective pads 506 on the opposite surfaces of the two clamping plates 505, it plays a role of buffering and protection when clamping the placement block 6 and the PCB board body 8, avoiding hard collision damage between the clamping plate 505 and the PCB board. The two fixing blocks 507 fix the two sides of the support frame 1 close to the conveyor belt 3. When the two clamping plates 505 move towards each other or in the opposite direction, the slide rods 509 symmetrically fixedly connected to the outer surface of the clamping plate 505 slide synchronously in the corresponding hollow tubes 508, playing a role of limiting, avoiding the position of the clamping plate 505 from shifting during movement and colliding with the edge of the conveyor belt 3, affecting the centering and fixing of the PCB board, and improving the stability of the PCB board defect visual inspection equipment.

[0026] Working principle: When performing visual defect detection on a PCB board, first, a batch of PCB board bodies 8 are sequentially placed into the rectangular grooves 7 of multiple placement blocks 6 for preliminary positioning. Then, the placement blocks 6 are sequentially placed above the conveyor belt 3. When the conveyor belt 3 is driven, it will drive multiple placement blocks 6 arranged in sequence on its top to move under the robotic arm 2. When the placement block 6 at the forefront touches the lever of the travel switch 4, the travel switch 4 simultaneously sends instructions to the conveyor belt 3 and the motor 502. The conveyor belt 3 stops driving, and the motor 502 starts. The output end of the motor drives the bidirectional threaded rod 501 to rotate clockwise inside the support frame 1. Two moving blocks 503 respectively drive two clamping plates 505 to move towards each other through two connecting rods 504, clamping the placement block 6, thereby fixing its position in the center and preventing excessive position deviation beyond the effective extension range of the robotic arm 2. The robotic arm 2 is started. An industrial vision camera is provided at the installation end of the robotic arm 2. The robotic arm 2 drives the industrial vision camera to detect the surface of the PCB board body 8 for defects. After the detection is completed, the conveyor belt 3 starts, enabling the current placement block 6 to continue moving, and at the same time, the lever of the travel switch 4 resets. In this way, the placement blocks 6 equipped with PCB boards will sequentially stop under the robotic arm 2 and be detected after being clamped and centered by the two clamping plates 505. By respectively providing protective pads 506 on the opposite surfaces of the two clamping plates 505, when clamping the placement block 6 and the PCB board body 8, it plays a role of buffering and protection, avoiding hard collision damage between the clamping plates 505 and the PCB board. Two fixing blocks 507 fix the two sides of the support frame 1 close to the conveyor belt 3. When the two clamping plates 505 move towards each other or in the opposite direction, the sliding rods 509 symmetrically and fixedly connected to the outer surfaces of the clamping plates 505 slide synchronously in the corresponding hollow tubes 508, playing a role of limiting, preventing the clamping plates 505 from shifting in position when moving and colliding with the edge of the conveyor belt 3, affecting the centering and fixing of the PCB board, and improving the stability of the PCB board defect visual detection device.

[0027] The above is only a preferred embodiment of the present invention, and it does not limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A PCB board defect visual inspection device, characterized in that: include: A support frame (1), a mechanical arm (2) is arranged on the top of the support frame (1), and a conveyor belt (3) is arranged inside the support frame (1); A positioning assembly (5), wherein the positioning assembly (5) is arranged at the top of the support frame (1), and the positioning assembly (5) comprises a motor (502), wherein the motor (502) is fixedly connected to the front surface of the support frame (1), and the output end of the motor (502) rotates and penetrates the outer surface of the support frame (1), and the output end of the motor (502) is fixedly connected to a bidirectional threaded rod (501), and a moving block (503) is symmetrically arranged on the outer surface of the bidirectional threaded rod (501), and the moving block (503) is threadedly connected to the bidirectional threaded rod (501), and the opposite surfaces of the two moving blocks (503) are fixedly connected to a connecting rod (504), and the end surfaces of the two connecting rods (504) are fixedly connected to a clamping plate (505).

2. The PCB board defect visual inspection device according to claim 1, characterized in that: The bidirectional threaded rod (501) is located inside the support frame (1), and the bidirectional threaded rod (501) is rotatably connected to the support frame (1).

3. The PCB board defect visual inspection device according to claim 1, characterized in that: The top of the support frame (1) is fixedly connected with a fixing block (507), and the inner surfaces of the two fixing blocks (507) are symmetrically fixedly connected with a hollow tube (508).

4. The PCB board defect visual inspection device according to claim 1, characterized in that: The outer surface of the clamping plate (505) is symmetrically fixedly connected with a sliding rod (509), and the outer surface of the sliding rod (509) is slidably connected to the inner surface of the hollow tube (508).

5. The PCB board defect visual inspection device according to claim 4, characterized in that: The opposing surfaces of the two clamping plates (505) are both provided with protection pads (506), and the protection pads (506) are rectangular in shape.

6. The PCB board defect visual inspection device according to claim 1, characterized in that: A placement block (6) is arranged on the top of the conveyor belt (3), a rectangular groove (7) is opened on the top of the placement block (6), and a PCB board body (8) is arranged on the inner surface of the rectangular groove (7).

7. The PCB board defect visual inspection device according to claim 1, characterized in that: A travel switch (4) is fixedly connected to the top of the support frame (1), and the travel switch (4) is matched with the placement block (6).

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