Modularized extensible circuit board AOI detection system

Abstract

A modularized extensible circuit board AOI detection system comprises a machine body, and a conveying device, a detection device, a manipulator, a main control device, a temporary storage device and a marking device which are arranged in the machine body, the conveying device comprises a feeding conveying device and a discharging conveying device; a detection position is arranged in the machine body, and the temporary storage device is arranged on the front side of the lower portion of the detection position. The feeding conveying device is used for transferring a circuit board to a detection position in the machine body, and the detection device is used for carrying out defect identification detection on the circuit board; a marking position is arranged on the outer side of the detection position, and the marking device is arranged above the marking position; the mechanical arm sorts the circuit boards according to the detected result so as to transfer the circuit boards to the discharging conveying device or the temporary storage device or the marking position. The master control device adopts a modularized temporary storage device and a marking device, so that the functions of the detection system are expanded, and the intelligent degree is improved; the device is high in practicability and has high popularization significance.

Description

Technical Field

[0001] This utility model relates to a circuit board inspection system; more particularly to a modular and scalable circuit board AOI inspection system. Background Technology

[0002] As electronic products move towards higher density and miniaturization, the manufacturing process of printed circuit boards (PCBs) has become significantly more complex. The accuracy and efficiency of detecting surface defects (such as short circuits, open circuits, poor solder joints, foreign matter residue, and copper foil scratches) directly affect product yield and reliability. Traditional manual visual inspection is limited by high subjectivity, low efficiency, and fatigue, and can no longer meet the demands of modern electronics manufacturing for high-speed, high-precision inspection. Currently, mainstream automated optical inspection equipment initially automates inspection, which greatly improves work efficiency. However, current automated inspection still has a certain possibility of false detection, and manual re-inspection is still necessary to ensure accuracy. When an anomaly is detected, staff re-inspect the defective area online according to the indicated defective area. However, when the inspection speed is high and the defect rate is high, it is necessary to pause or slow down to provide sufficient re-inspection time, thus affecting inspection efficiency. In addition, to improve efficiency, some equipment uses automation to sort defective products to a defective product area, from which staff then transfer them to a defective product processing area for unified processing. However, this method cannot promptly re-inspect anomalies detected on the equipment, increasing the difficulty of re-inspection and reducing the timeliness of re-inspection processing. If a misjudgment is not detected in time, multiple misjudgments of the same type may occur subsequently. Utility Model Content

[0003] Therefore, it is necessary to provide a modular and scalable AOI inspection system for circuit boards to address the shortcomings of existing technologies.

[0004] A modular and scalable AOI inspection system for circuit boards includes a main body and a conveying device, an inspection device, a robotic arm, a main control device, a temporary storage device, and a marking device disposed within the main body. The conveying device includes an infeed conveying device and an outfeed conveying device. An inspection position is provided within the main body, and the temporary storage device is located below and in front of the inspection position, comprising multiple layers of upper and lower temporary storage layers. The infeed conveying device transfers the circuit boards to the inspection position within the main body, and the inspection device performs defect identification and inspection on the circuit boards. A marking position is located outside the inspection position, and the marking device is located above the marking position. The robotic arm sorts the circuit boards according to the inspection results, transferring them to the outfeed conveying device, the temporary storage device, or the marking position. The main control device has a control panel, which includes an inspection display screen and a re-inspection display screen.

[0005] Furthermore, the marking device includes a robotic arm, a rotary drive, and a dotting device. The robotic arm is located outside the marking position, the rotary drive is mounted on the robotic arm, and the dotting device is mounted on the rotary drive. The robotic arm drives the dotting device to move.

[0006] Furthermore, the dotting device includes a cylinder, a bottom cover, a top cover, and a dotting head. The top cover and the bottom cover are respectively disposed at the upper and lower ends of the cylinder. The dotting head is installed inside the bottom cover. The bottom cover has a through hole in the middle, and the dotting head extends into the through hole.

[0007] Furthermore, the cylinder body is provided with a storage cavity, the top cover extends downward with a limiting post, the limiting post extends into the storage cavity, the bottom end of the limiting post is provided with a mounting hole, and the top end of the printing head extends into the mounting hole.

[0008] Furthermore, the printing head has a flange at its upper center, a feed hole at the outer side below the flange, and a discharge port at the bottom end of the printing head that extends upward and communicates with the feed hole.

[0009] Furthermore, the detection device includes a camera module, an image processing module, an analysis and comparison module, and an alarm device; the camera module is located directly above the detection position, the image processing module and the analysis and comparison module are both located inside the main control device, and the alarm device is located on the top of the machine body.

[0010] Furthermore, the temporary storage device includes temporary storage racks arranged side by side at intervals, and the temporary storage racks are provided with support plates arranged side by side vertically, with the support plates at corresponding positions of the two temporary storage racks being arranged horizontally.

[0011] Furthermore, the temporary storage rack includes two side plates, two rotating chains, two rotating shafts, and a support plate. The two side plates are arranged in a front-to-back orientation, and the two rotating shafts are arranged vertically on the inner sides of the two side plates. The two rotating chains are respectively vertically installed at the corresponding side ends of the two rotating shafts, and the two ends of the support plate are installed at the corresponding positions of the two chains.

[0012] Furthermore, the bottom of the temporary storage device is provided with two guide rails, and the two temporary storage racks are mounted on the guide rails and move along the guide rails to move away from or towards each other.

[0013] Furthermore, it also includes a sensor, which is mounted on a support plate and whose information is connected to the main control device.

[0014] In summary, this modular and expandable AOI inspection system for circuit boards integrates a modular temporary storage device and a marking device into a single system, allowing operators to select appropriate anomaly handling methods according to their needs. When operators can perform online re-inspection, they can choose to use the temporary storage device 50 for online processing. If operators are unable to perform online re-inspection in a timely manner, they can choose to use the marking device 60 for marking before re-inspection, facilitating more targeted identification of anomalies during subsequent re-inspections. This utility model adopts a modular design, which expands the functionality of the inspection system and improves its level of intelligence; this utility model is highly practical and has significant potential for widespread application. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the modular and expandable AOI inspection system for circuit boards according to this utility model;

[0016] Figure 2 for Figure 1 Internal structure diagram;

[0017] Figure 3 for Figure 2 A schematic diagram of the temporary storage device;

[0018] Figure 4 This is a schematic diagram of the marking device.

[0019] Figure 5 for Figure 4 A partial cross-sectional structural diagram. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0021] like Figures 1 to 5As shown, this utility model provides a modular and expandable AOI inspection system for circuit boards. The system includes a main body 10 and a conveying device 20, an inspection device (not shown), a robotic arm (not shown), a main control device (not shown), a temporary storage device 50, and a marking device 60, all housed within the main body 10. The conveying device 20 includes an infeed conveying device 21 and an outfeed conveying device 22. An inspection position 23 is provided within the main body 10. The infeed conveying device 21 transfers the circuit boards to the inspection position 23 within the main body 10, and the inspection device performs defect identification and inspection on the circuit boards. A marking position 24 is provided on the outer side of the inspection position 23, and the marking device 60 is positioned above the marking position 24. The robotic arm sorts the circuit boards according to the inspection results. If the boards are good, the robotic arm transfers them to the outfeed conveying device 22 for transport to the next process; if they are defective, they are transferred to the temporary storage device 50 for temporary storage and re-inspection. When staff are unable to re-inspect online, the robotic arm transfers the defective product to marking position 24 to mark the abnormal points for subsequent re-inspection.

[0022] The detection device includes a camera module, an image processing module, an analysis and comparison module, and an alarm device 32. The camera module is positioned directly above the detection position 23. The image processing module and the analysis and comparison module are both located within the main control device. The alarm device 32 is located on the top of the main body 10. The main control device has a control panel 41, through which the image information and analysis and comparison information detected by the detection device are displayed and stored. When an anomaly is detected, the main control device transmits a signal to the alarm device 32 to issue an alarm. The camera module includes a camera and supplementary lights. In this embodiment, four supplementary lights are provided around the camera to illuminate the circuit board 100 from all angles, thereby improving the clarity of the image. The image processing module processes the image to make it clearer and easier to compare. The analysis and comparison module compares and analyzes the processed image with a standard image. The alarm device 32 issues an alarm when an anomaly is detected.

[0023] The temporary storage device 50 is located below and in front of the detection position 23. The temporary storage device 50 includes temporary storage racks 51 arranged side-by-side at intervals. Two guide rails 70 are provided at the bottom of the temporary storage device 50, and the two temporary storage racks 51 are mounted on the guide rails 70 and can move along the guide rails 70 to move away from or towards each other; thus, it can be used to support and limit the movement of plates of various sizes. Each temporary storage rack 51 includes two side plates 511, two rotating chains 512, two rotating shafts 513, a support plate 514, and a sensor. The two side plates 511 are arranged front-to-back facing each other. The two rotating shafts 513 are arranged vertically on the inner sides of the side plates 511. The two rotating chains 512 are vertically mounted on the corresponding ends of the two rotating shafts 513, and the rotating chains 512 rotate around the two rotating shafts 513. The two ends of the support plate 514 are mounted on the corresponding positions of the two chains, and the synchronous rotation of the two chains drives the support plate 514 to move up and down. The sensor is mounted on the support plate 514. When a circuit board falls onto the support plate 514, the sensor detects the information of the board and the rotating chain 512 rotates downwards by one step to facilitate the reception of the next circuit board. Conversely, when both the upper and lower support plates 514 are occupied by circuit boards, and the topmost circuit board is removed, the support plate 514 will rise.

[0024] The marking device 60 includes a robotic arm (not shown), a rotary drive 61, and a dot printing device 62. The robotic arm 61 is located outside the marking position 24, the rotary drive 61 is mounted on the robotic arm, and the dot printing device 62 is mounted on the rotary drive 61. The robotic arm drives the dot printing device 62 to move, so as to print arrows at abnormal locations on the circuit board. The rotary drive 61 drives the dot printing device 62 to rotate, so that the arrows correspond to the abnormal location points. The dot printing device 62 includes a cylinder 621, a bottom cover 622, a top cover 623, and a dot printing head 624. The top cover 623 and the bottom cover 622 are respectively located at the upper and lower ends of the cylinder 621, and the dot printing head 624 is installed inside the bottom cover 622. The cylinder has a storage chamber, and the top cover 623 extends downward with a limiting post 625, which extends into the storage chamber. The bottom end of the limiting post 625 has a mounting hole 626. The bottom cover 622 has a through hole in the middle, and the printing head 624 has a flange 627 on the upper middle part. A feed hole 628 is located on the outer side below the flange 627. The bottom end of the printing head 624 has an outlet 629 that extends upward and communicates with the feed hole 628. A silicone head 630 is provided at the bottom end of the printing head 624. Furthermore, in this embodiment, the storage chamber stores pigment, which is an erasable material that can be wiped off during subsequent repairs.

[0025] The robotic arm moves the dot-printing device 62 to the required position, and the rotary drive 61 rotates the dot-printing device 62 to the required angle, aligning the arrow position with the abnormal point. The dot-printing device 62 is also equipped with a drive device, which can be a motor, cylinder, or other conventional equipment. The drive device moves the dot-printing device 62 downwards to press it onto the circuit board. The dot-printing head 624 is pressed upwards by the circuit board, and the feed hole 628 is exposed in the storage chamber. The pigment in the storage chamber is printed downwards onto the circuit board from the feed hole 628 through the discharge port 629. In this embodiment, the dot-printing head 624 is made of a relatively heavy metal material. After printing, the dot-printing device 62 moves upwards again, and the dot-printing head 624 moves downwards under gravity until the feed hole 628 is blocked in the discharge port 629, at which point the discharge stops.

[0026] During operation, the circuit board enters the machine body 10 through the feeding conveyor 21. The robotic arm transfers the circuit board to the detection position 23, where the detection device performs the inspection. If the product is good, the robotic arm transfers it to the discharge conveyor 22 for the next process. If the detected product is defective, the robotic arm transfers it to the two uppermost support plates 514 of the temporary storage device 50. Sensors on the support plates 514 detect the board information and associate it with the board's abnormal information. Then, the robotic arm continues to move new circuit boards to the detection position 23 for inspection. The control panel 41 includes a detection display screen and a re-inspection display screen. The detection display screen displays the inspected product information, while the re-inspection display screen displays the re-inspected product information. When the operator removes the circuit board, the re-inspection display screen displays the abnormal information detected on that layer of the circuit board, and the operator performs a re-inspection based on the abnormal information point; this is clearer and eliminates the need to pause or slow down the equipment. In this embodiment, the re-inspection display screen is an independent computer display screen 42.

[0027] When staff fail to conduct online re-inspection, the image processing module generates marking points on the corresponding areas of the detected abnormality on the circuit board. In this embodiment, the marking points are arrow-shaped. If the solder joint or component is abnormal, the marking point is located on the circuit board plane outside the solder joint or component, with the arrow pointing towards the abnormal location. The robotic arm transfers the abnormal product to the marking position 24, and the control device drives the marking device 60 to imprint the arrow on the marking point on the circuit board according to the received marking point location information. After marking, the product is transferred to the receiving trough outside the machine body.

[0028] In summary, this modular and expandable AOI inspection system for circuit boards integrates the modular temporary storage device 50 and the marking device 60 into a single system, allowing operators to select appropriate anomaly handling methods according to their needs. When operators can perform online re-inspection, they can choose to use the temporary storage device 50 for online processing. If operators are unable to perform online re-inspection in a timely manner, they can choose to use the marking device 60 for marking before re-inspection, facilitating more targeted identification of anomalies during subsequent re-inspections. This utility model adopts a modular design, which expands the functionality of the inspection system and improves its level of intelligence; this utility model is highly practical and has significant potential for widespread application.

[0029] The above-described embodiments are merely one implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A modular and scalable AOI inspection system for circuit boards, characterized in that: The system includes a main body and a conveying device, a detection device, a robotic arm, a main control device, a temporary storage device, and a marking device disposed within the main body. The conveying device includes an infeed conveying device and an outfeed conveying device. A detection position is provided within the main body, and the temporary storage device is located below and in front of the detection position, comprising multiple layers of upper and lower temporary storage layers. The infeed conveying device transfers circuit boards to the detection position within the main body, and the detection device performs defect identification and detection on the circuit boards. A marking position is located outside the detection position, and the marking device is located above the marking position. The robotic arm sorts the circuit boards according to the detection results, transferring them to the outfeed conveying device, the temporary storage device, or the marking position. The main control device has a control panel, which includes an inspection display screen and a re-inspection display screen.

2. The modular and scalable AOI inspection system for circuit boards as described in claim 1, characterized in that: The marking device includes a robotic arm, a rotary drive, and a dotting device. The robotic arm is located outside the marking position, the rotary drive is mounted on the robotic arm, and the dotting device is mounted on the rotary drive. The robotic arm drives the dotting device to move.

3. The modular and scalable circuit board AOI inspection system as described in claim 2, characterized in that: The dotting device includes a cylinder, a bottom cover, a top cover, and a dotting head. The top cover and the bottom cover are respectively disposed at the upper and lower ends of the cylinder. The dotting head is installed inside the bottom cover. A through hole is provided in the middle of the bottom cover, and the dotting head extends into the through hole.

4. The modular and scalable circuit board AOI inspection system as described in claim 3, characterized in that: The cylinder is provided with a storage chamber, and the top cover extends downward to form a limiting post that extends into the storage chamber. The bottom end of the limiting post is provided with a mounting hole, and the top end of the printing head extends into the mounting hole.

5. The modular and scalable AOI inspection system for circuit boards as described in claim 4, characterized in that: The printing head has a flange at its upper center, a feed hole at the outer side below the flange, and a discharge port at the bottom end of the printing head that extends upward and communicates with the feed hole.

6. The modular and scalable AOI inspection system for circuit boards as described in claim 1, characterized in that: The detection device includes a camera module, an image processing module, an analysis and comparison module, and an alarm device; the camera module is located directly above the detection position, the image processing module and the analysis and comparison module are both located inside the main control device, and the alarm device is located on the top of the machine body.

7. The modular and scalable AOI inspection system for circuit boards as described in claim 1, characterized in that: The temporary storage device includes temporary storage racks arranged side by side at intervals, and the temporary storage racks are provided with support plates arranged side by side vertically, with the support plates at corresponding positions of the two temporary storage racks being arranged horizontally.

8. The modular and scalable circuit board AOI inspection system as described in claim 7, characterized in that: The temporary storage rack includes two side plates, two rotating chains, two rotating shafts, and a support plate. The two side plates are arranged in a front-to-back orientation, and the two rotating shafts are arranged vertically on the inner sides of the two side plates. The two rotating chains are respectively vertically installed on the corresponding side ends of the two rotating shafts, and the two ends of the support plate are installed on the corresponding positions of the two chains.

9. The modular and scalable circuit board AOI inspection system as described in claim 7, characterized in that: The bottom of the temporary storage device is provided with two guide rails, and the two temporary storage racks are mounted on the guide rails and move along the guide rails to move away from or towards each other.

10. The modular and scalable AOI inspection system for circuit boards as described in claim 1, characterized in that: It also includes a sensor, which is mounted on a support plate and whose information is connected to the main control device.

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