An AOI-based integrated circuit board detection device

Abstract

The utility model discloses a kind of integrated circuit board detection devices based on AOI, belong to circuit board detection technical field, solve the problem of high cost of current circuit board double-sided detection mode detection;Specifically including mounting bracket, the middle of mounting bracket is equipped with conveying assembly, AOI front detection system and AOI back detection system are arranged in the both ends of conveying assembly, the middle of front detection system and back detection system is equipped with turnover assembly;Turnover assembly is equipped with circuit board clamp.The utility model in the middle, when circuit board is conveyed to AOI front detection system below, AOI front detection system detects the front of circuit board;After detection, circuit board is turned over by turnover assembly;After turning over, AOI back detection system detects the back of circuit board;The design entire detection process has realized assembly line operation, and detection efficiency is high;Meanwhile, using the way of front and back detection in proper order to detect circuit board, reduce detection cost.

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing technology, and in particular to an integrated circuit board testing device based on AOI. Background Technology

[0002] Automated Optical Inspection (AOI) is a technology based on optical principles used to detect defects such as bridging, misalignment, and abnormal solder content in the soldering process of integrated circuit (IC) packaging circuit boards. It is widely used in PCB, FPD, and semiconductor manufacturing. AOI uses a high-speed vision system to scan the circuit board, acquire images, compare them with a standard parameter database, and then process the images to identify and mark the defect locations.

[0003] Automated optical inspection (AOI) technology is relatively mature in the current field. However, ordinary AOI equipment is only used for single-sided inspection of circuit boards, limiting its functionality. As circuit board structures become increasingly complex, double-sided AOI inspection machines have been adopted. AOI double-sided inspection machines use two imaging systems for image inspection: the upper system detects component errors, omissions, and reversals, as well as measuring the height of critical areas; the lower system inspects solder joints. Simultaneous dual-image inspection allows for more complete acquisition of solder joint information on the tested substrate, leading to the widespread application of double-sided inspection machines. However, AOI double-sided inspection machines are expensive and have extremely high costs. Furthermore, double-sided inspection requires placing the integrated circuit board on the inspection station for individual inspection. While simultaneous double-sided inspection is efficient, the unique structural design prevents streamlined operation. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an AOI-based integrated circuit board inspection device, which solves the problem of high inspection costs associated with existing double-sided circuit board inspection methods.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An AOI-based integrated circuit board inspection device includes a mounting frame, a conveying component mounted in the middle of the mounting frame, an AOI front inspection system and an AOI back inspection system at both ends of the conveying component, and a flipping component in the middle of the AOI front inspection system and the AOI back inspection system; a circuit board clamp is mounted on the flipping component.

[0006] In this solution, the circuit board is conveyed on a conveyor assembly. When the circuit board is conveyed to the front inspection system, the front inspection system inspects the front side of the circuit board. After the circuit board is conveyed to the flipping assembly, it is flipped. After flipping, the circuit board is then conveyed to the back inspection system, which inspects the back side of the circuit board. This design realizes a streamlined operation for the entire inspection process, resulting in high inspection efficiency. At the same time, by using the front and back sides to inspect the circuit board sequentially, the inspection cost is greatly reduced.

[0007] Furthermore, the conveying assembly includes a driving roller and a driven roller, with a conveyor belt wound around the driving roller and the driven roller; the two ends of the driving roller and the driven roller are movably connected to the mounting frame; the central shaft of the driving roller is drively connected to the drive assembly on the mounting frame. A first roller and a second roller are disposed between the driving roller and the driven roller. The upper surfaces of the first roller and the second roller are at the same horizontal line as the upper surfaces of the driving roller and the driven roller. The conveyor belt passes over the upper surfaces of the first roller and the second roller. A third roller is disposed between the first roller and the second roller. The lower surface of the third roller is lower than the upper surfaces of the first roller and the second roller. The conveyor belt passes over the bottom of the third roller.

[0008] In this solution, the drive component drives the active roller to rotate, which in turn drives the conveyor belt and the driven roller to rotate, thereby moving the circuit board being inspected. The design of the third roller reserves a position in the middle of the conveyor belt for installing the flipping component, so that the flipping component can remain flush with the surface of the conveyor belt after installation. This ensures that the circuit board can be smoothly transported from the conveyor belt to the flipping component.

[0009] Furthermore, the flipping assembly includes a flipping shaft, one end of which is mounted on one side of the mounting bracket, and the other end of which is connected to a servo motor on the mounting bracket via a coupling; a flipping plate is connected to the side of the flipping shaft closest to the AOI front detection system.

[0010] In this solution, a conveyor belt transports the circuit board to a flipping plate; a servo motor drives a flipping shaft to flip, which in turn drives the flipping plate to flip, thereby flipping the circuit board.

[0011] Furthermore, the circuit board fixture includes a fixture housing, with a mounting plate connected to one side of the fixture housing. The bottom of the mounting plate is fixed to the top of the flipping shaft. An electric cylinder is installed inside the fixture housing, with its tail end extending out of the fixture housing and mounted on the mounting plate by bolts. A trapezoidal block is connected to the telescopic end of the electric cylinder, and two first sliders are respectively connected to the waists on both sides of the trapezoidal block. The two first sliders are slidably connected in the grooves inside the two moving blocks. Two clamping plates are respectively connected to the ends of the two moving blocks, and a second slider is provided at the root of each clamping plate. The two clamping plates extend from the front end of the fixture housing, and the second sliders on the clamping plates are slidably positioned in the grooves at the front end of the fixture housing.

[0012] In this scheme, the electric cylinder drives the trapezoidal block to move, the trapezoidal block drives the two first sliders to move, and the two first sliders drive the two moving blocks to move in opposite directions or towards each other by using the inclined plane, thereby driving the clamping plate to clamp the circuit board.

[0013] Furthermore, the circuit board to be tested is placed on the conveyor belt, and two fixing strips are fixed to both sides of the circuit board by screws; two clamps clamp the circuit board from the fixing strips.

[0014] In this solution, the side of the circuit board is relatively narrow, making it difficult to directly clamp with a clamp. A fixing strip is designed to facilitate clamping and fixing with a clamp. The circuit board has a built-in through hole, eliminating the need for additional holes and preventing any impact on the circuit board.

[0015] Furthermore, a photoelectric sensor is installed on the mounting bracket, and the photoelectric sensor is located on the side of the flip plate.

[0016] In this solution, a photoelectric sensor is used to detect whether the circuit board is being transported to the flipping plate; once the circuit board reaches the flipping plate, the clamping plate is controlled by an electric cylinder to hold the circuit board.

[0017] Furthermore, the drive assembly includes a drive motor, which is mounted on the side of the mounting bracket; the output shaft of the drive motor is connected to the central shaft of the drive roller via a reduction gear set.

[0018] The beneficial effects of this utility model are: The AOI-based integrated circuit board inspection device provided by this utility model includes an AOI front-side inspection system and an AOI back-side inspection system positioned above a conveyor belt. During inspection, the circuit board is conveyed on the conveyor belt. When the circuit board reaches the area below the AOI front-side inspection system, the AOI front-side inspection system inspects the front side of the circuit board. After inspection, the circuit board is flipped over and then conveyed to the area below the AOI back-side inspection system, where the AOI back-side inspection system inspects the back side of the circuit board. The entire inspection process achieves streamlined operation and high inspection efficiency. Furthermore, by employing a sequential inspection method for both the front and back sides of the circuit board, the inspection cost is significantly reduced compared to existing AOI double-sided inspection machines. Attached Figure Description

[0019] Figure 1 This is a top view schematic diagram of an AOI-based integrated circuit board inspection device according to this utility model; Figure 2 This is a schematic diagram of the main structure of an AOI-based integrated circuit board inspection device according to this utility model; Figure 3 This is a schematic diagram of the structure of the flipping component and the circuit board clamp in this utility model.

[0020] Figure label: 1. Conveying assembly; 11. Driving roller; 12. Driven roller; 13. Conveyor belt; 14. Drive assembly; 15. First roller; 16. Second roller; 17. Third roller; 18. Drive motor; 19. Reduction gear set; 2. AOI front detection system; 3. AOI back detection system; 4. Tilting assembly; 41. Tilting shaft; 42. Servo motor; 43. Tilting plate; 5. Circuit board fixture; 51. Mounting plate; 52. Electric cylinder; 53. Fixture housing; 54. Trapezoidal block; 55. First slider; 56. Moving block; 57. Clamping plate; 58. Second slider; 6. Circuit board; 61. Fixing strip; 7. Photoelectric sensor; 8. Mounting bracket; Detailed Implementation The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The specific embodiments of the present invention are described below to facilitate understanding by those skilled in the art. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they fall within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0021] like Figure 1 and Figure 2As shown, this embodiment provides an AOI-based integrated circuit board inspection device, which solves the problem of high inspection cost of existing double-sided circuit board inspection methods; specifically, it includes: 2. AOI front inspection system; 3. AOI back inspection system; 4. Flip assembly; 5. Circuit board fixture; and 8. Mounting bracket. The mounting frame 8 has a conveying component 1 installed in the middle, and AOI front detection system 2 and AOI back detection system 3 are set at both ends of the conveying component 1. A flipping component 4 is set in the middle of the AOI front detection system 2 and AOI back detection system 3. A circuit board clamp 5 is installed on the flipping component 4.

[0022] The conveying assembly 1 includes a driving roller 11 and a driven roller 12, with a conveyor belt 13 wound around them. The two ends of the driving roller 11 and the driven roller 12 are movably connected to the mounting frame 8. The central axis of the driving roller 11 is connected to a drive assembly 14 on the mounting frame 8. The drive assembly 14 drives the driving roller 11 to rotate, which in turn drives the conveyor belt 13 and the driven roller 12 to rotate, thereby moving the circuit board 6 being inspected.

[0023] A first roller 15 and a second roller 16 are disposed between the driving roller 11 and the driven roller 12. The upper surfaces of the first roller 15 and the second roller 16 are at the same horizontal line as the upper surfaces of the driving roller 11 and the driven roller 12. The conveyor belt 13 passes over the upper surfaces of the first roller 15 and the second roller 16. A third roller 17 is disposed between the first roller 15 and the second roller 16, and the lower surface of the third roller 17 is lower than the upper surfaces of the first roller 15 and the second roller 16. The conveyor belt 13 passes over the bottom of the third roller 17. The design of the third roller 17 reserves a position for installing the flipping assembly 4 in the middle of the conveyor belt 13, so that the flipping assembly 4 can remain flush with the surface of the conveyor belt 13 after installation; ensuring that the circuit board 6 can be smoothly transported from the conveyor belt 13 to the flipping assembly 4. The two ends of the first roller 15, the second roller 16, and the third roller 17 are movably connected to both sides of the mounting frame.

[0024] The flipping assembly 4 includes a flipping shaft 41 and a flipping plate 43. One end of the flipping shaft 41 is mounted on one side of the mounting frame 8, and the other end of the flipping shaft 41 is connected to the servo motor 42 on the mounting frame 8 via a coupling. The flipping plate 43 is connected to the side of the flipping shaft 41 closest to the AOI front detection system 2. The conveyor belt 13 transports the circuit board 6 onto the flipping plate 43; the servo motor 42 drives the flipping shaft 41 to flip, and the flipping shaft 41 drives the flipping plate 43 to flip, thereby flipping the circuit board 6.

[0025] like Figure 3As shown, the circuit board fixture 5 includes a fixture housing 53, with a mounting plate 51 connected to one side of the fixture housing 53. The bottom of the mounting plate 51 is fixed to the top of the flipping shaft 41. An electric cylinder 52 is installed inside the fixture housing 53. The tail end of the electric cylinder 52 extends out of the fixture housing 53 and is mounted on the mounting plate 51 by bolts. A trapezoidal block 54 is connected to the telescopic end of the electric cylinder 52. Two first sliders 55 are connected to the waists on both sides of the trapezoidal block 54. The two first sliders 55 are slidably connected to the grooves inside the two moving blocks 56. Two clamping plates 57 are connected to the ends of the two moving blocks 56. A second slider 58 is provided at the root of each clamping plate 57. The two clamping plates 57 extend from the front end of the fixture housing 53, and the second sliders 58 on the clamping plates 57 are slidably disposed in the grooves at the front end of the fixture housing 53. The electric cylinder 52 drives the trapezoidal block 54 to move, and the trapezoidal block 54 drives the two first sliders 55 to move. The two first sliders 55 use the inclined plane to drive the two moving blocks 56 to move in opposite directions, thereby driving the clamping plate 57 to clamp the circuit board 6.

[0026] The circuit board 6 to be tested is placed on the conveyor belt 13. Two fixing strips 61 are fixed to both sides of the circuit board 6 by screws. Two clamping plates 57 clamp the circuit board 6 from the fixing strips 61. Since the sides of the circuit board 6 are narrow, it is not easy to clamp it directly with the clamping plates 57. The fixing strips 61 are designed to facilitate the clamping and fixing by the clamping plates 57. The circuit board 6 has a built-in through hole, so no additional hole is needed and it will not affect the circuit board 6.

[0027] A photoelectric sensor 7 is installed on the mounting bracket 8, and the photoelectric sensor 7 is located on the side of the flip plate 43. The photoelectric sensor 7 is used to detect whether the circuit board 6 has been transported to the flip plate 43; when the circuit board 6 reaches the flip plate 43, the clamping plate 57 is controlled by the electric cylinder 52 to clamp the circuit board 6.

[0028] The drive assembly 14 includes a drive motor 18, which is mounted on the side of the mounting bracket 8; the output shaft of the drive motor 18 is connected to the central shaft of the drive roller 11 via a reduction gear set 19.

[0029] The working principle of this embodiment is as follows: During inspection, fixing strips 61 are first installed on both sides of the circuit board 6, and then the circuit board 6 is placed on the conveyor belt 13 for conveying. When the circuit board 6 is conveyed to the front inspection system 2, the front inspection system 2 inspects the front of the circuit board 6; the circuit board 6 continues to be conveyed, and after the photoelectric sensor 7 detects that the circuit board 6 has been conveyed to the flipping plate 43, the electric cylinder 52 drives the clamping plate 57 to clamp the fixing strips 61 on both sides of the circuit board 6; after clamping, the servo motor 42 drives the flipping plate 43 and the circuit board 6 to flip; after flipping, the circuit board 6 is then conveyed by the conveyor belt 13 to the back inspection system 3, and the back inspection system 3 inspects the back of the circuit board 6.

[0030] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of this invention, and should be understood that the scope of protection of this invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on these technical teachings disclosed in this invention without departing from the essence of this invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. An AOI-based integrated circuit board inspection device, characterized in that: The system includes a mounting frame (8), a conveying assembly (1) is mounted in the middle of the mounting frame (8), an AOI front detection system (2) and an AOI back detection system (3) are provided at both ends of the conveying assembly (1), and a flipping assembly (4) is provided in the middle between the AOI front detection system (2) and the AOI back detection system (3); a circuit board clamp (5) is mounted on the flipping assembly (4).

2. The AOI-based integrated circuit board inspection device according to claim 1, characterized in that: The conveying assembly (1) includes a drive roller (11) and a driven roller (12), with a conveyor belt (13) wound around the drive roller (11) and the driven roller (12); the two ends of the drive roller (11) and the driven roller (12) are movably connected to the mounting frame (8); the central axis of the drive roller (11) is connected to the drive assembly (14) on the mounting frame (8). A first roller (15) and a second roller (16) are disposed between the driving roller (11) and the driven roller (12). The upper surfaces of the first roller (15) and the second roller (16) are on the same horizontal line as the upper surfaces of the driving roller (11) and the driven roller (12). The conveyor belt (13) passes over the upper surfaces of the first roller (15) and the second roller (16). A third roller (17) is disposed between the first roller (15) and the second roller (16). The lower surface of the third roller (17) is lower than the upper surfaces of the first roller (15) and the second roller (16). The conveyor belt (13) passes over the bottom of the third roller (17).

3. The AOI-based integrated circuit board inspection device according to claim 2, characterized in that: The flipping assembly (4) includes a flipping shaft (41), one end of which is mounted on one side of the mounting frame (8), and the other end of which is connected to a servo motor (42) on the mounting frame (8) via a coupling; a flipping plate (43) is connected to the side of the flipping shaft (41) near the AOI front detection system (2).

4. The AOI-based integrated circuit board inspection device according to claim 3, characterized in that: The circuit board clamp (5) includes a clamp housing (53), one side of which is connected to a mounting plate (51), the bottom of which is fixed to the top of the flip shaft (41); an electric cylinder (52) is provided inside the clamp housing (53), the tail end of which extends out of the clamp housing (53) and is mounted on the mounting plate (51) by bolts; a trapezoidal block (54) is connected to the telescopic end of the electric cylinder (52), and the trapezoidal block (54) has two sides Two first sliders (55) are connected to the waist of the fixture respectively; the two first sliders (55) are slidably connected in the grooves inside the two moving blocks (56); the ends of the two moving blocks (56) are respectively connected to two clamps (57), and a second slider (58) is provided at the root of each clamp (57); the two clamps (57) extend from the front end of the fixture housing (53), and the second sliders (58) on the clamps (57) are slidably arranged in the grooves at the front end of the fixture housing (53).

5. The AOI-based integrated circuit board inspection device according to claim 4, characterized in that: The circuit board (6) to be tested is placed on the conveyor belt (13). Two fixing strips (61) are fixed to both sides of the circuit board (6) by screws. The two clamping plates (57) clamp the circuit board (6) from the fixing strips (61).

6. The AOI-based integrated circuit board inspection device according to claim 3, characterized in that: A photoelectric sensor (7) is provided on the mounting bracket (8), and the photoelectric sensor (7) is located on the side of the flip plate (43).

7. The AOI-based integrated circuit board inspection device according to claim 2, characterized in that: The drive assembly (14) includes a drive motor (18), which is mounted on the side of the mounting bracket (8); the output shaft of the drive motor (18) is connected to the central shaft of the drive roller (11) via a reduction gear set (19).

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