Circuit board automatic detection feeding mechanism of AOI visual inspection machine

Abstract

The utility model relates to the technical field of circuit board detection feeding, in particular to an automatic circuit board detection feeding mechanism of an AOI (automatic optical inspection) machine, which comprises a main support. The device further comprises a sliding plate and a material receiving head, the sliding plate is installed at the upper end of the main support, a camera is arranged at the upper end of the sliding plate, a sliding groove is formed in the sliding plate, and triangular side abutting strips are fixedly connected to the two sides of the inner side of the sliding groove. According to the utility model, through the arrangement of the sliding plate, the triangular side abutting strip and the material receiving head, the circuit board is subjected to angular deflection due to the fact that the side surface of the circuit board is in contact with the longer triangular side abutting strip on one side in the sliding process, then the circuit board slides in the sliding groove with the width gradually narrowed from high to low, and the angle is automatically corrected at the same time; if the front faces of the circuit boards face upwards, the circuit boards slide off from the straight discharging grooves in an accelerated mode, and if the back faces of the circuit boards face upwards, the circuit boards slide off from the arc-shaped overturning grooves and are overturned in the process of sliding off from the arc-shaped overturning grooves.

Description

Technical Field

[0001] This utility model relates to the field of circuit board inspection and feeding technology, and in particular to an automatic circuit board inspection and feeding mechanism for an AOI visual inspection machine. Background Technology

[0002] Automated Optical Inspection (AOI) is a high-speed, high-precision optical imaging inspection system that uses machine vision as the inspection standard technology. It can overcome the shortcomings of traditional manual inspection using optical instruments. Its applications range from R&D and manufacturing quality control in high-tech industries to defense, consumer goods, medical care, environmental protection, and power industries.

[0003] During the feeding process, circuit boards may be placed face up or face down on the belt conveyor. When flipping circuit boards with their backs facing up, mechanical grippers or other relatively complex flipping devices are required. However, such complex flipping devices often require high purchase and maintenance costs.

[0004] Therefore, to address the current situation where flipping circuit boards with the back facing up requires the use of mechanical grippers or other relatively complex flipping devices, thus increasing the purchase and maintenance costs of the equipment, an automatic circuit board detection and feeding mechanism for an AOI visual inspection machine can be designed. This mechanism automatically corrects the angle of the circuit board using triangular side abutments and a slide that gradually narrows from high to low. Subsequently, if the circuit board is facing up, it slides off the straight unloading chute; if the circuit board is facing down, it slides off the arc-shaped flipping chute, and is flipped during the sliding process in the arc-shaped flipping chute, thus solving the aforementioned problems. Utility Model Content

[0005] To overcome the need for mechanical grippers or other relatively complex flipping devices in the process of flipping circuit boards with the back side facing up, which often require high purchase and maintenance costs, thus increasing the purchase and maintenance costs of the device.

[0006] The technical solution of this utility model is as follows: an automatic circuit board detection and feeding mechanism for an AOI visual inspection machine, including a main support; it also includes a slide plate and a receiving head. A slide plate is installed on the upper end of the main support, a camera is set on the upper end of the slide plate, a groove is opened on the slide plate, and triangular side abutments are fixed to both sides of the inner side of the groove. A vibration motor is installed on the lower end of the slide plate, and a receiving head is set at the front end of the slide plate. An arc-shaped turning groove is opened inside the receiving head, a straight unloading groove is opened on one side of the arc-shaped turning groove, a limit groove is opened on one side of the receiving head, and a displacement electric push rod is set at the rear end of the limit groove. A limit rod is slidably connected in the limit groove.

[0007] Preferably, after the circuit board falls onto the chute, it slides down at a constant speed under the slight vibration of the vibrating motor on the slide plate. When the camera detects that the circuit board is facing upwards, the receiving head is retracted by the displacement electric push rod to align the straight discharge chute and the chute. When the camera detects that the circuit board is facing backwards, the receiving head is pushed out by the displacement electric push rod to align the arc-shaped flipping chute and the chute. During the slide, the side of the circuit board will first contact the longer triangular side abutment strip and deflect at the angle. Then, it slides in the chute, which is set to gradually narrow from high to low, while automatically correcting the angle. Subsequently, if the circuit board is facing upwards, it accelerates down from the straight discharge chute to the belt conveyor. If the circuit board is facing backwards, it slides down from the arc-shaped flipping chute to the belt conveyor and flips over during the slide.

[0008] Preferably, the camera is mounted on the main support, the width of the chute is set to gradually narrow from high to low, the lengths of the two triangular side abutments are set to be one long and one short, the displacement electric push rod is fixed to the receiving head, and the slope of the straight discharge chute is set to be greater than that of the chute.

[0009] Preferably, the lower end of the main support is provided with an overhead groove, and two lifting electric push rods are fixedly connected to the rear end of the upper surface of the main support. The upper ends of the two lifting electric push rods are jointly fixed with a gate plate, which is set in a sliding groove. A belt conveyor is provided at the lower end of the main support.

[0010] Preferably, the displacement electric push rod and the limit rod are both fixedly connected to a side fixing frame on one side, and two pads are provided at the front end of the side fixing frame. The side fixing frame and the two pads are all fixedly connected to the side of the belt conveyor.

[0011] Preferably, a calibration electric push rod is installed at the upper end of both pads, a hollow column is installed on one side of each calibration electric push rod, and a push plate is fixed to one side of each hollow column.

[0012] Preferably, each push plate has two guide rods slidably connected to it, and a soft clamp is fixed to one side of both guide rods. Springs are installed on the outside of each guide rod.

[0013] Preferably, a light-transmitting groove is provided in the middle of both the push plate and the soft clamping plate, and a laser displacement sensor is installed in the hollow column on one side.

[0014] The beneficial effects of this utility model are:

[0015] By setting up a sliding plate, triangular side abutments, and a receiving head, the circuit board deflects at an angle during its descent due to contact with the longer triangular side abutment on one side. Then, while sliding in a chute whose width gradually narrows from high to low, the angle is automatically corrected. Subsequently, if the circuit board is face up, it accelerates its descent from the straight unloading chute; if the circuit board is back face up, it slides from the arc-shaped flipping chute and flips over during its descent. This simple structure achieves angle correction and automatic flipping, thereby reducing the purchase and maintenance costs of the equipment. Attached Figure Description

[0016] Figure 1 The diagram shown is an overall structural schematic of the automatic circuit board inspection and feeding mechanism of the AOI visual inspection machine of this utility model.

[0017] Figure 2 The diagram shown is a schematic of the main support structure of the automatic circuit board inspection and feeding mechanism of the AOI visual inspection machine of this utility model.

[0018] Figure 3 The diagram shown is a schematic of the displacement electric push rod structure of the automatic circuit board detection and feeding mechanism of the AOI visual inspection machine of this utility model.

[0019] Figure 4 The diagram shown is a schematic of the slide plate structure of the automatic circuit board detection and feeding mechanism of the AOI visual inspection machine of this utility model.

[0020] Figure 5 The diagram shown is a schematic of the vibration motor structure of the automatic circuit board detection and feeding mechanism of the AOI visual inspection machine of this utility model.

[0021] Figure 6 The diagram shown is a schematic of the material receiving head structure of the automatic circuit board detection and feeding mechanism of the AOI visual inspection machine of this utility model.

[0022] Figure 7 The diagram shown is a schematic of the arc-shaped flipping groove structure of the automatic circuit board detection and feeding mechanism of the AOI visual inspection machine of this utility model.

[0023] Figure 8 The diagram shown is a schematic representation of the belt conveyor structure of the automatic circuit board detection and feeding mechanism of the AOI visual inspection machine of this utility model.

[0024] Figure 9 The diagram shown is a schematic of the soft clamp structure of the automatic circuit board detection and feeding mechanism of the AOI visual inspection machine of this utility model.

[0025] Figure 10 The diagram shown is a schematic of the laser displacement sensor structure of the automatic circuit board detection and feeding mechanism of the AOI visual inspection machine of this utility model.

[0026] Explanation of reference numerals in the attached drawings: 1. Main support; 2. Camera; 3. Slide plate; 4. Slide groove; 5. Triangular side abutment bar; 6. Vibration motor; 7. Material receiving head; 8. Arc-shaped tilting chute; 9. Straight discharge chute; 10. Limiting groove; 11. Displacement electric push rod; 12. Limiting rod; 13. Overhead chute; 14. Lifting electric push rod; 15. Gate plate; 16. Belt conveyor; 17. Side fixing frame; 18. Pad; 19. Correction electric push rod; 20. Hollow column; 21. Push plate; 22. Guide rod; 23. Soft clamp plate; 24. Spring; 25. Laser displacement sensor; 26. Light transmission groove. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Please see Figures 1-10 This utility model provides an embodiment of an automatic circuit board detection and feeding mechanism for an AOI visual inspection machine, including a main support 1; it also includes a slide plate 3 and a receiving head 7. The slide plate 3 is mounted on the upper end of the main support 1, and a camera 2 is installed on the upper end of the slide plate 3. A slide groove 4 is opened on the slide plate 3, and triangular side abutments 5 are fixed to both sides of the inner side of the slide groove 4. A vibration motor 6 is installed on the lower end of the slide plate 3, and a receiving head 7 is provided at the front end of the slide plate 3. An arc-shaped flip groove 8 is opened inside the receiving head 7, and a straight discharge groove 9 is opened on one side of the arc-shaped flip groove 8. A limit groove 10 is opened on one side of the receiving head 7, and a displacement electric push rod 11 is provided at the rear end of the limit groove 10. A limit rod 12 is slidably connected in the limit groove 10. After the circuit board falls onto the slide groove 4, the circuit board slides down at a uniform speed under the small vibration generated by the vibration motor 6 on the slide plate 3. When camera 2 detects that the circuit board is facing up, it retracts the receiving head 7 by using the displacement electric push rod 11 to align the straight discharge chute 9 and the slide chute 4. When camera 2 detects that the circuit board is facing down, it pushes out the receiving head 7 by using the displacement electric push rod 11 to align the arc-shaped flipping chute 8 and the slide chute 4. During the slide, the side of the circuit board will first contact the longer triangular side abutment 5 and deflect at the angle. Then, it slides in the slide chute 4, which is set to gradually narrow from high to low, while automatically correcting the angle. Subsequently, if the circuit board is facing up, it will accelerate down from the straight discharge chute 9 to the belt conveyor 16. If the circuit board is facing down, it will slide down from the arc-shaped flipping chute 8 to the belt conveyor 16 and flip over during the slide.

[0029] Please see Figures 1-8In this embodiment, the camera 2 is mounted on the main support 1, the width of the slide 4 is set to gradually narrow from high to low, the lengths of the two triangular side abutments 5 are set to be one long and one short, the displacement electric push rod 11 is fixed to the receiving head 7, and the slope of the straight unloading chute 9 is set to be greater than that of the slide 4. The camera 2 is used to collect image information of the circuit board and transmit the image information to the information processor of the AOI visual inspection machine. The lower end of the main support 1 is provided with an overhead groove 13, and the rear end of the upper surface of the main support 1 is fixed with two lifting electric push rods 14. A gate 15 is fixedly connected to the upper end, and the gate 15 is set in the slide groove 4. A belt conveyor 16 is set at the lower end of the main support 1. When the camera 2 detects the circuit board passing by, the gate 15 is lowered by the lifting electric push rod 14 to prevent other circuit boards from entering the slide groove 4. The belt conveyor 16 is used to transfer the circuit board. A side fixing frame 17 is fixedly connected to one side of the displacement electric push rod 11 and the limit rod 12. Two pads 18 are set at the front end of the side fixing frame 17. The side fixing frame 17 and the two pads 18 are fixedly connected to the side of the belt conveyor 16.

[0030] Please see Figure 1 and Figures 8-10 In this embodiment, a correction electric push rod 19 is installed on the upper end of each of the two pads 18. A hollow column 20 is installed on one side of each correction electric push rod 19. A push plate 21 is fixedly connected to one side of each hollow column 20. The correction electric push rod 19 is used to push the hollow column 20 and the push plate 21. Two guide rods 22 are slidably connected on each push plate 21. A soft clamping plate 23 is fixedly connected to one side of each of the two guide rods 22. A spring 24 is installed on the outside of each guide rod 22. The two soft clamping plates 23 clamp each other to the circuit board in the middle to perform secondary correction on the circuit board. A light-transmitting groove 26 is opened in the middle of the push plate 21 and the soft clamping plate 23. A laser displacement sensor 25 is installed in the hollow column 20 on one side. The laser displacement sensor 25 is used to detect the circuit board that passes by. The model of the laser displacement sensor 25 is set as ZLDS115.

[0031] During use, after the circuit board falls onto the slide 4, it slides down at a constant speed under the slight vibration of the vibrating motor 6 on the slide plate 3. When the camera 2 detects that the front of the circuit board is facing up, it retracts the receiving head 7 through the displacement electric push rod 11 so that the straight discharge chute 9 and the slide 4 are connected. When the camera 2 detects that the back of the circuit board is facing up, it pushes out the receiving head 7 through the displacement electric push rod 11 so that the arc-shaped flipping groove 8 and the slide 4 are connected. During the slide, the side of the circuit board will first contact the longer triangular side abutment 5 and deflect at the angle. Then, it slides in the slide 4, which is set to gradually narrow from high to low, while automatically correcting the angle. Subsequently, if the front of the circuit board is facing up, the circuit board will accelerate down from the straight discharge chute 9 to the belt conveyor 16. If the back of the circuit board is facing up, the circuit board will slide down from the arc-shaped flipping groove 8 to the belt conveyor 16 and flip over during the slide in the arc-shaped flipping groove 8.

[0032] When the camera 2 detects a circuit board passing by, it lowers the gate 15 via the lifting electric push rod 14 to prevent other circuit boards from entering the chute 4. The belt conveyor 16 is used to transfer circuit boards that have fallen onto the belt conveyor 16. When the laser displacement sensor 25 detects a circuit board passing by through the light-transmitting groove 26, it pushes the two soft clamps 23 to clamp the circuit board and then immediately retracts to correct the angle of the circuit board. At the same time, the two lifting electric push rods 14 raise the gate 15 to allow other circuit boards to enter the chute 4. In addition, when the two soft clamps 23 clamp the circuit board, the soft clamps 23 can retract due to the guide rod 22 and the spring 24 to avoid excessive clamping force.

[0033] Through the above steps, by setting up the slide plate 3, the triangular side abutment strip 5, and the receiving head 7, the circuit board will deflect at an angle during its slide due to contact with the longer triangular side abutment strip 5 on one side. Then, while sliding in the slide groove 4, whose width gradually narrows from high to low, the angle is automatically corrected. Subsequently, if the front of the circuit board is facing up, the circuit board will slide down from the straight unloading groove 9 at an accelerated speed. If the back of the circuit board is facing up, the circuit board will slide down from the arc-shaped flipping groove 8 and flip over during the slide in the arc-shaped flipping groove 8. Thus, the angle correction and automatic flipping are achieved through a simple structure, thereby reducing the purchase and maintenance costs of the equipment.

Claims

1. An automatic circuit board inspection and feeding mechanism for an AOI visual inspection machine, comprising a main support (1); characterized in that: It also includes a slide plate (3) and a receiving head (7). The upper end of the main support (1) is equipped with a slide plate (3). The upper end of the slide plate (3) is equipped with a camera (2). The slide plate (3) has a groove (4). Both sides of the inner side of the groove (4) are fixed with triangular side abutments (5). The lower end of the slide plate (3) is equipped with a vibration motor (6). The front end of the slide plate (3) is equipped with a receiving head (7). The inside of the receiving head (7) is equipped with an arc-shaped turning groove (8). One side of the arc-shaped turning groove (8) is equipped with a straight discharge groove (9). One side of the receiving head (7) is equipped with a limit groove (10). The rear end of the limit groove (10) is equipped with a displacement electric push rod (11). The limit groove (10) is slidably connected with a limit rod (12).

2. The automatic circuit board inspection and feeding mechanism of the AOI visual inspection machine according to claim 1, characterized in that: The camera (2) is mounted on the main bracket (1), the width of the chute (4) is set to gradually narrow from high to low, the lengths of the two triangular side abutments (5) are set to be one long and one short, the displacement electric push rod (11) is fixed on the receiving head (7), and the slope of the straight discharge chute (9) is set to be greater than that of the chute (4).

3. The automatic circuit board inspection and feeding mechanism of the AOI visual inspection machine according to claim 1, characterized in that: The lower end of the main support (1) is provided with an overhead groove (13). Two lifting electric push rods (14) are fixedly connected to the rear end of the upper surface of the main support (1). The upper ends of the two lifting electric push rods (14) are fixedly connected with a gate plate (15), and the gate plate (15) is set in the slide groove (4). A belt conveyor (16) is provided at the lower end of the main support (1).

4. The automatic circuit board inspection and feeding mechanism of the AOI visual inspection machine according to claim 3, characterized in that: The displacement electric push rod (11) and the limiting rod (12) are both fixedly connected to a side fixing frame (17). The front end of the side fixing frame (17) is provided with two pads (18). The side fixing frame (17) and the two pads (18) are all fixedly connected to the side of the belt conveyor (16).

5. The automatic circuit board inspection and feeding mechanism of the AOI visual inspection machine according to claim 4, characterized in that: The upper ends of the two pads (18) are equipped with correction electric push rods (19), and hollow columns (20) are installed on one side of each correction electric push rod (19). Push plates (21) are fixed to one side of each hollow column (20).

6. The automatic circuit board inspection and feeding mechanism of the AOI visual inspection machine according to claim 5, characterized in that: Two guide rods (22) are slidably connected to the push plate (21). A soft clamp plate (23) is fixed to one side of both guide rods (22). A spring (24) is installed on the outside of each guide rod (22).

7. The automatic circuit board inspection and feeding mechanism of the AOI visual inspection machine according to claim 6, characterized in that: A light-transmitting groove (26) is provided in the middle of both the push plate (21) and the soft clamp plate (23), and a laser displacement sensor (25) is installed in the hollow column (20) on one side.

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