Optical inspection machine

Abstract

The utility model discloses an optical inspection machine, which belongs to the technical field of optical inspection and comprises a base and a light shield fixedly mounted at the top of the base. A servo linear sliding table is mounted on the inner bottom wall of the base, a lifting device is mounted at the moving end of the servo linear sliding table, and a supporting plate is fixedly mounted at the top of the lifting device; an in-situ turn-over assembly is installed on the supporting plate. The in-situ turn-over assembly comprises a material receiving turn-over assembly and an alternate limiting assembly. Through the mode, when the inspection machine is used, the PCB is positioned by the material receiving and turning-over assembly and supported by the alternate limiting assembly, after one side of the PCB is subjected to optical inspection, the material receiving and turning-over assembly 71 controls the PCB to be turned over by 180 degrees in situ to achieve the turning-over effect on the PCB, and in the turning-over process of the PCB, the PCB can be turned over by 180 degrees, so that the PCB is not prone to falling off. The alternating limiting assembly 72 only supports the bottom of the PCB all the time and avoids the top of the PCB, so that the PCB is stably limited for optical inspection, and taking and placing operation of the material moving device is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of optical inspection technology, and specifically to an optical inspection machine. Background Technology

[0002] Automated Optical Inspection (AOI) is an advanced method for automatically detecting defects during the PCB manufacturing process using optical imaging and image processing technologies. It is widely used in modern electronics manufacturing to ensure PCB quality and reliability.

[0003] AOI (Automated Optical Inspection) machines are the most commonly used optical inspection machines. They use high-precision optical scanning to compare with the physical PCB board to identify defects. However, PCB boards usually require double-sided inspection. After the operator completes the optical inspection of one side of the PCB board using the AOI machine, the AOI machine will reset the PCB board, and the operator will flip the PCB board over. Then, the AOI machine will be used to perform optical inspection on the other side of the PCB board. The optical inspection efficiency is low and cannot meet the needs of continuous optical inspection of large batches of PCB boards.

[0004] Based on this, the present invention designs an optical inspection machine to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an optical inspection machine.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An optical inspection machine includes a base and a light shield fixedly mounted on top of the base;

[0008] A servo linear slide is installed on the inner bottom wall of the base. A lifting device is installed on the moving end of the servo linear slide. A support plate is fixedly installed on the top of the lifting device. An in-situ flipping component is installed on the support plate.

[0009] The in-situ flipping assembly includes a receiving flipping assembly and an alternating limiting assembly. The receiving flipping assembly is installed on the top surface of the support plate and is used to position the PCB board and control its in-situ flipping by 180 degrees. The alternating limiting assembly is installed on the receiving flipping assembly and is used to support the bottom of the PCB board and avoid the top of the PCB board.

[0010] Furthermore, the receiving and flipping assembly includes a first bracket, a second bracket, a rotating block, a positioning frame, a rotary motor, and a connecting rod. The bottom of the first bracket and the bottom of the second bracket are respectively fixedly installed on the front and rear sides of the top surface of the support plate. The rotating block is rotatably connected to the first bracket through a bearing. The rotary motor is fixedly connected to the rear side of the second bracket. The output end of the rotary motor rotates through the second bracket and is fixedly connected to the rear end of the rotating block through the connecting rod. The front end of the rotating block rotates through the first bracket and is fixedly installed with a positioning frame adapted to the PCB board.

[0011] Furthermore, the front end of the positioning frame is provided with an opening to facilitate gripping the PCB board.

[0012] Furthermore, the alternating limiting component includes a material support component and a cylindrical tube. The rear end of the cylindrical tube is fixedly connected to the front side of the second bracket, and the connecting rod passes through the inside of the cylindrical tube without contacting the cylindrical tube. A set of material support components is provided on each side of the positioning frame.

[0013] Furthermore, the material support assembly includes a limiting plate, a limiting component, a linkage rod, and a roller. The limiting plate is slidably connected to the positioning frame via the limiting component. The front end of the linkage rod is fixedly connected to the rear end face of the limiting plate. The rear end of the linkage rod passes through the rotating block and is slidably connected. The rear end of the linkage rod passes through the rotating block and is rotatably connected to the roller.

[0014] The outer wall of the cylindrical tube is provided with a cam groove that is rolled and connected to two rollers.

[0015] Furthermore, the optical inspection assembly includes a linear module, a mounting plate, and a CCD module. The linear module is fixedly mounted on the inner top wall of the light shield, the movable end of the linear module is fixedly mounted on the mounting plate, and the CCD module is fixedly mounted on the bottom of the mounting plate.

[0016] Furthermore, the lifting device adopts a scissor lift structure.

[0017] Furthermore, the limiting plate is designed to be U-shaped.

[0018] Compared with the prior art, the advantages of this utility model are as follows:

[0019] 1. When using this inspection machine, the positioning frame positions the PCB board, and the lower limiting plate supports the bottom of the PCB board. After one side of the PCB board has completed optical inspection, the rotary motor drives the positioning frame to flip the PCB board. During the rotation of the positioning frame, the two limiting plates move synchronously in opposite directions to create an alternating lifting effect on the PCB board. This ensures that after the PCB board is flipped, it maintains the posture of the lower side being supported by the limiting plate and the upper side being avoided by the limiting plate, which facilitates the handling of the PCB board. The optical inspection component and the servo linear slide work together to perform optical inspection on the entire side of the PCB board, realizing automated double-sided optical inspection of the PCB board. It is easy to operate, highly efficient in inspection, and easy to connect directly to the PCB board production line for optical inspection.

[0020] 2. The PCB board can be controlled to move in the forward and backward directions by a servo linear slide, while the lifting device can make the PCB board move down before flipping to avoid the optical inspection components, thus achieving the effect of flipping the PCB board. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This utility model provides a three-dimensional optical inspection machine. Figure 1 ;

[0023] Figure 2 This is a side sectional view of an optical inspection machine according to the present invention;

[0024] Figure 3 This utility model provides a three-dimensional optical inspection machine. Figure 2 ;

[0025] Figure 4 This utility model provides a three-dimensional optical inspection machine. Figure 3 ;

[0026] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0027] The labels in the diagram represent:

[0028] 1. Base; 2. Light shield; 3. Optical inspection assembly; 31. Linear module; 32. Mounting plate; 33. CCD module; 4. Servo linear slide; 5. Lifting device; 6. Support plate; 7. In-situ flipping assembly; 71. Material receiving and flipping assembly; 711. First bracket; 712. Second bracket; 713. Rotating block; 714. Positioning frame; 715. Rotary motor; 716. Connecting rod; 72. Alternating limit assembly; 721. Limiting plate; 722. Limiting assembly; 723. Linkage rod; 724. Roller; 725. Cam groove; 726. Cylindrical tube. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-5 An optical inspection machine includes a base 1 and a light shield 2 fixedly installed on the top of the base 1. A servo linear slide 4 is installed on the inner bottom wall of the base 1. A lifting device 5 is installed on the moving end of the servo linear slide 4. A support plate 6 is fixedly installed on the top of the lifting device 5. An in-situ flipping component 7 is installed on the support plate 6.

[0031] The in-situ flipping component 7 includes a receiving flipping component 71 and an alternating limiting component 72. The receiving flipping component 71 is installed on the top surface of the support plate 6 and is used to position the PCB board and control its in-situ flipping by 180 degrees. The alternating limiting component 72 is installed on the receiving flipping component 71 and is used to support the bottom of the PCB board and avoid the top of the PCB board.

[0032] It is worth noting that both the servo linear slide 4 and the lifting device 5 employ mature technologies in this field. For example, the lifting device 5 can adopt a scissor-type lifting structure, driven by a cylinder for height adjustment, reducing the space occupied by the lifting device 5 after the support plate 6 is lowered, thus increasing space utilization. The servo linear slide 4 uses a cylinder to drive the slider to move on the slide rail, thereby driving the lifting device 5 to move back and forth.

[0033] When optical inspection of the PCB board is required, the PCB board is placed on the receiving and flipping assembly 71. The servo linear slide 4 moves the PCB board into the light shield 2. The optical inspection assembly 3 performs optical inspection on one horizontal row of the PCB board. The servo linear slide 4 controls the PCB board to move back and forth. With the cooperation of the optical inspection assembly 3 and the servo linear slide 4, the entire side of the PCB board can be optically inspected. Then, the lifting device 5 controls the PCB board to move down to avoid the optical inspection assembly 3. Then, the receiving and flipping assembly 71 controls the PCB board to flip 180 degrees in place to achieve the flipping effect of the PCB board. During the flipping process, the alternating limiting assembly 72 always only supports the bottom of the PCB board and avoids the top of the PCB board, so that the PCB board is stably limited for optical inspection and facilitates the picking and placing operations of the transfer device.

[0034] After the PCB board is flipped, the lifting device 5 controls the optical inspection component 3 to move upward and reset. The optical inspection component 3 and the servo linear slide 4 work together to perform optical inspection on the other side of the PCB board. The PCB board after completing the optical inspection is controlled by the servo linear slide 4 to move forward to the outside of the light shield 2, so that the feeding and discharging positions of the PCB board are the same, thereby realizing automated double-sided optical inspection of the PCB board. It is easy to operate, efficient in inspection, and easy to be directly connected to the PCB board production line.

[0035] In some embodiments, the receiving and flipping assembly 71 includes a first bracket 711, a second bracket 712, a rotating block 713, a positioning frame 714, a rotary motor 715, and a connecting rod 716. The bottom of the first bracket 711 and the bottom of the second bracket 712 are respectively fixedly installed on the front and rear sides of the top surface of the support plate 6. The rotating block 713 is rotatably connected to the first bracket 711 through a bearing. The rotary motor 715 is fixedly connected to the second bracket 712. The output end of the rotary motor 715 rotates through the second bracket 712 and is fixedly connected to the rear end of the rotating block 713 through the connecting rod 716. The front end of the rotating block 713 rotates through the first bracket 711 and is fixedly installed with a positioning frame 714 adapted to the PCB board.

[0036] The positioning frame 714 has an opening at its front end, which facilitates the grabbing of PCB boards by operators or material handling devices such as robotic arms.

[0037] In some embodiments, the alternating limiting component 72 includes a material support component and a cylindrical tube 726. The rear end of the cylindrical tube 726 is fixedly connected to the front side of the second bracket 712. The connecting rod 716 passes through the inside of the cylindrical tube 726 without contacting the cylindrical tube 726. A set of material support components is provided on each of the upper and lower sides of the positioning frame 714.

[0038] Specifically, the material support assembly includes a limiting plate 721, a limiting component 722, a linkage rod 723, and a roller 724. The limiting plate 721 is slidably connected to the positioning frame 714 via the limiting component 722. The front end of the linkage rod 723 is fixedly connected to the rear end face of the limiting plate 721, and the rear end of the linkage rod 723 passes through the rotating block 713 and is slidably connected. Furthermore, the rear end of the linkage rod 723 passes through the rotating block 713 and is rotatably connected to the roller 724. The limiting component 722 can adopt a dovetail groove limiting structure. A dovetail groove is formed on the limiting plate 721, and a dovetail block is fixed on the positioning frame 714. The dovetail block is inserted into the dovetail groove and slidably connected.

[0039] Preferably, the outer wall of the cylindrical tube 726 is provided with a cam groove 725 that is tactilely connected to two rollers 724; the rollers 724 of the two sets of material support assemblies are both arranged to slide in the cam groove 725, so that the linkage rods 723 of the two sets of material support assemblies move synchronously in opposite directions.

[0040] Preferably, the limiting plate 721 is U-shaped to reduce its own weight.

[0041] In use, when the positioning frame 714 is horizontal, one limiting plate 721 is located directly below the positioning frame 714, and the other limiting plate 721 is located above and behind the positioning frame 714, completely offset vertically from the positioning frame 714. At this time, the PCB board can be placed inside the positioning frame 714, which positions the PCB board. The lower limiting plate 721 supports the bottom of the PCB board. After one side of the PCB board has undergone optical inspection, the rotary motor 715 is started, which drives the rotating block 713 to rotate 180 degrees via the connecting rod 716, causing the positioning frame 714 to... When the PCB board is flipped over, during the rotation of the positioning frame 714, the two rollers 724 roll in the cam groove 725 and drive the two linkage rods 723 to slide respectively. This causes the limiting plate 721, which was originally located on the lower side of the positioning frame 714, to gradually move backward as it flips to the upper side of the positioning frame 714, while the limiting plate 721, which was originally located on the upper side of the positioning frame 714, gradually moves forward as it flips to the lower side of the positioning frame 714. This creates an effect of alternately supporting the PCB board, so that after the PCB board is flipped over, it still maintains the posture of being supported by the limiting plate 721 on the lower side and avoided by the limiting plate 721 on the upper side.

[0042] In some embodiments, the optical inspection assembly 3 includes a linear module 31, a mounting plate 32, and a CCD module 33. The linear module 31 is fixedly installed on the inner top wall of the light shield 2. The moving end of the linear module 31 is fixedly installed with the mounting plate 32, and the bottom of the mounting plate 32 is fixedly installed with the CCD module 33. The linear module 31 can control the CCD module 33 to move left and right to perform optical inspection on a horizontal row of the PCB board.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An optical inspection machine, comprising a base (1), a light shield (2) fixedly mounted on the top of the base (1), and an optical inspection assembly (3), characterized in that: A servo linear slide (4) is installed on the inner bottom wall of the base (1). A lifting device (5) is installed on the moving end of the servo linear slide (4). A support plate (6) is fixedly installed on the top of the lifting device (5). An in-situ flipping component (7) is installed on the support plate (6). The in-situ flipping component (7) includes a receiving flipping component (71) and an alternating limiting component (72). The receiving flipping component (71) is installed on the top surface of the support plate (6). The receiving flipping component (71) is used to position the PCB board and control its in-situ flipping by 180 degrees. The alternating limiting component (72) is installed on the receiving flipping component (71). The alternating limiting component (72) is used to support the bottom of the PCB board and avoid the top of the PCB board. The optical inspection assembly (3) includes a linear module (31), a mounting plate (32) and a CCD module (33). The linear module (31) is fixedly installed on the inner top wall of the light shield (2). The moving end of the linear module (31) is fixedly installed with the mounting plate (32), and the bottom of the mounting plate (32) is fixedly installed with the CCD module (33).

2. The optical inspection machine according to claim 1, characterized in that, The receiving and flipping assembly (71) includes a first bracket (711), a second bracket (712), a rotating block (713), a positioning frame (714), a rotary motor (715), and a connecting rod (716). The bottom of the first bracket (711) and the bottom of the second bracket (712) are respectively fixedly installed on the front and rear sides of the top surface of the support plate (6). The rotating block (713) is rotatably connected to the first bracket (711) through a bearing. The rotary motor (715) is fixedly connected to the rear side of the second bracket (712). The output end of the rotary motor (715) rotates through the second bracket (712) and is fixedly connected to the rear end of the rotating block (713) through the connecting rod (716). The front end of the rotating block (713) rotates through the first bracket (711) and is fixedly installed with a positioning frame (714) that is compatible with the PCB board.

3. The optical inspection machine according to claim 2, characterized in that, The front end of the positioning frame (714) is provided with an opening to facilitate gripping the PCB board.

4. The optical inspection machine according to claim 3, characterized in that, The alternating limiting component (72) includes a material support component and a cylindrical tube (726). The rear end of the cylindrical tube (726) is fixedly connected to the front side of the second bracket (712). The connecting rod (716) passes through the inside of the cylindrical tube (726) without contacting the cylindrical tube (726). A set of material support components is provided on the upper and lower sides of the positioning frame (714).

5. The optical inspection machine according to claim 4, characterized in that, The material support assembly includes a limiting plate (721), a limiting component (722), a linkage rod (723), and a roller (724). The limiting plate (721) is slidably connected to the positioning frame (714) through the limiting component (722). The front end of the linkage rod (723) is fixedly connected to the rear end face of the limiting plate (721). The rear end of the linkage rod (723) passes through the rotating block (713) and is slidably connected. The rear end of the linkage rod (723) passes through the rotating block (713) and is rotatably connected to the roller (724). The outer wall of the cylindrical tube (726) is provided with a cam groove (725) that is rotatably connected to two rollers (724).

6. The optical inspection machine according to claim 5, characterized in that, The lifting device (5) adopts a scissor-type lifting structure.

7. The optical inspection machine according to claim 6, characterized in that, The limiting plate (721) is U-shaped.

Images