PCB board crest welding post-vision detection device

Abstract

The utility model discloses a kind of PCB board crest weld visual detection devices, comprising: shell, including frame, the frame is provided with middle support plate and bottom support plate, the bottom of shell is provided with vision processor;PCB board conveying line, the PCB conveying line is set on the middle support plate, including adjustable width conveying mechanism, clamping mechanism, the clamping mechanism is set on the conveying mechanism, for clamping PCB board;Visual detection device;The visual detection device is set on the bottom support plate, the visual detection device is used to photograph PCB board, and the vision processor is used to identify PCB board crest weld defect.The utility model improves the detection efficiency and precision of PCB board crest weld, and can be applicable to different sizes of PCB board.

Description

Technical Field

[0001] This utility model relates to the technical field of PCB board visual inspection devices, and in particular to a PCB board post-wave soldering visual inspection device. Background Technology

[0002] In modern electronics manufacturing, the quality of printed circuit board assembly (PCBA) directly affects product performance and reliability, making effective testing and inspection crucial. A PCBA is formed by soldering electronic components onto a PCB to create a complete circuit module. Wave soldering is a widely used soldering process in PCBA production, particularly suitable for soldering through-hole (DIP) components.

[0003] The soldering quality of PCBAs is crucial to product reliability and lifespan, thus requiring rigorous testing. Testing allows for the timely detection of potential problems during PCBA production, such as short circuits and poor soldering. Prompt detection and repair prevent defective products from entering the market, thereby reducing subsequent rework and after-sales costs.

[0004] Post-wave soldering visual inspection of PCBAs includes checking for solder joint defects such as cold solder joints, missing solder joints, insufficient solder, excessive solder, short circuits, and missing pins. High-quality solder joints should be smooth, conical in shape, with a bright surface and uniform color, avoiding problems such as cold solder joints and short circuits.

[0005] Currently, post-wave soldering inspection of PCBAs still largely relies on manual visual inspection. Manual inspection is inefficient, prone to fatigue and missed inspections, and cannot meet the efficiency requirements of large-scale production. Existing vision inspection equipment is not compatible with various types and sizes of PCBs, has low inspection accuracy, and is prone to missed and false inspections. Utility Model Content

[0006] The main purpose of this invention is to provide a visual inspection device for wave soldering of PCB boards, which aims to improve the inspection efficiency and accuracy of wave soldering of PCB boards.

[0007] To achieve the above objectives, this utility model provides a visual inspection device for PCB board wave soldering post-continuation inspection, comprising: The outer shell (1) includes a frame (101), in which a middle support plate (114) and a bottom support plate (115) are provided, and a vision processor (116) is provided at the bottom of the outer shell. PCB conveying line (2), the PCB conveying line (2) is disposed on the intermediate support plate (114), including a width adjustable conveying mechanism and a clamping mechanism (208), the clamping mechanism is disposed on the conveying mechanism and is used to clamp the PCB board (216). Visual inspection device (3); the visual inspection device (3) is set on the bottom support plate (115), the visual inspection device is used to take pictures of the PCB board (216), and the visual processor (116) is used to identify wave soldering defects of the PCB board (216).

[0008] A further technical solution of the present invention is that the conveying mechanism includes: a first fixed bracket (201), a second fixed bracket (212), a front plate of the conveying line (202), a rear plate of the conveying line (206), a first guide rail (207), a first guide rail slider (204), a support plate (210), a lead screw (211), a lead screw nut (217), and a motor (209). The first guide rail (207) is disposed on the intermediate support plate (114). The front plate of the conveyor line (202) is disposed on the intermediate support plate (114) through the first fixed bracket (201) and the second fixed bracket (212) and is perpendicular to the first guide rail (207). The rear plate of the conveyor line (206) is slidably disposed on the first guide rail (207) through the first guide rail slider (204). The clamping mechanism (208) is disposed on the rear plate of the conveyor line (206). The support plate (210) is fixed on the intermediate support plate (114). The motor (209) is fixed on the support plate (210). The lead screw nut (217) is fixed on the rear plate of the conveyor line (206). The lead screw (211) passes through the lead screw nut (217) and its two ends are respectively fixed on the bearings of the front plate of the conveyor line (202) and the rear plate of the conveyor line (206).

[0009] A further technical solution of the present invention is that the PCB conveying line (2) further includes a first sensor (203), a second sensor (213), a baffle (214), a blocking cylinder (215), and conveying rollers 205 disposed at the bottom of the front plate (202) and the rear plate (206) of the conveying line; The first sensor (203), the second sensor (213), and the blocking cylinder (215) are disposed on the front plate (202) of the conveyor line, and the (214) is disposed on the blocking cylinder (215).

[0010] A further technical solution of the present invention is that the visual inspection device (3) includes: a plurality of support members (301), a guide rail mounting plate (314), a second guide rail (312), a second guide rail slider (313), a module mounting plate (315), an X-axis module (307), a Y-axis module (302), a Y-axis module slider (303), a first camera support member (304), a second camera support member (305), a third camera support member (316), a camera fixing plate (310), a camera fixing guide rail (311), a multi-color light (306), a lens (308), and a camera (309); The guide rail mounting plate (314) and the module mounting plate (315) are arranged parallel to each other on the plurality of support members. The second guide rail (312) is arranged on the guide rail mounting plate (314). The X-axis module (307) is arranged on the module mounting plate (315). The second guide rail slider (313) is arranged on the second guide rail (312). The X-axis module (307) is provided with an X-axis module slider. The two ends of the Y-axis module (302) are respectively connected to the second guide rail slider (313) and the X-axis module slider. The Y-axis module slider (303) is arranged on the Y-axis module (302). The first camera support member (304) is fixed. The second camera support (305) is fixed on the Y-axis module slider (304), the multicolor light (306) is fixed on the second camera support (305), the third camera support (316) is fixed on the second camera support (305), the camera fixing guide rail (311) is fixed on the third camera support (316), a slider is fixed on the camera fixing guide rail (311), the camera fixing plate (310) is fixed on the slider, the camera (309) is fixed on the camera fixing plate (310), and the lens (308) is mounted on the camera (309).

[0011] A further technical solution of the present invention is that the front of the frame (101) is provided with a lower front door (102) and a upper front door (104), a semi-transparent observation window (103) is provided on the upper front door (104), a button indicator light (105) is provided near the upper front door (104), an alarm indicator light (106) is provided on the top of the frame (101), a display screen (107) and a mouse and keyboard (109) are provided on one side of the frame (101) through a display screen bracket (108), a cooling fan (110) is provided on the lower side of one side of the frame (101), a foot support (111) and a bottom caster (112) are provided at the bottom of the frame (101), and an electrical isolation chamber (113) is also provided inside the frame (101).

[0012] A further technical solution of the present invention is that the electrical isolation chamber (113) is equipped with a miniature circuit breaker, a relay, and terminals.

[0013] The beneficial effects of this PCB board wave soldering post-visual inspection device are: This utility model, through the above technical solution, includes: a shell, comprising a frame, with a middle support plate and a bottom support plate disposed within the frame, and a vision processor disposed at the bottom of the shell; a PCB conveyor line, the PCB conveyor line being disposed on the middle support plate, including a width-adjustable conveying mechanism and a clamping mechanism, the clamping mechanism being disposed on the conveying mechanism for clamping the PCB board; and a vision inspection device, the vision inspection device being disposed on the bottom support plate, the vision inspection device being used to photograph the PCB board, and the vision processor being used to identify wave soldering defects on the PCB board, thereby improving the inspection efficiency and accuracy of wave soldering on the PCB board, and being applicable to PCB boards of different sizes. Attached Figure Description

[0014] 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 the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the PCB board wave soldering post-visual inspection device of this utility model; Figure 2 This is a schematic diagram of the preferred embodiment of the PCB board wave soldering post-visual inspection device without the front upper door and front lower door; Figure 3 This is a structural diagram of a PCB conveyor line; Figure 4 This is a schematic diagram of the structure of a vision inspection device.

[0016] Explanation of icon numbers: Outer shell 1: Frame 101; Lower front door 102; Observation window 103; Upper front door 104; Button indicator light 105; Alarm indicator light 106; Display screen 107; Display screen bracket 108; Mouse and keyboard 109; Cooling fan 110; Foot support 111; Bottom casters 112; Electrical isolation chamber 113; Middle support plate 114; Bottom support plate 115; Vision processor 116; PCB conveyor line 2: First fixed bracket 201; conveyor line front plate 202; first sensor 203; first guide rail slider 204; conveyor roller 205; conveyor line rear plate 206; first guide rail 207; clamping mechanism 208; motor 209; support plate 210; lead screw 211; second fixed bracket 212; second sensor 213; stop bar 214; blocking cylinder 215; PCB board 216; lead screw nut 217; Visual inspection device 3: Support component 301; Y-axis module 302; Y-axis module slider 303; First camera support component 304; Second camera support component 305; Multicolor light 306; X-axis module 307; Lens 308; Camera 309; Camera mounting plate 310; Camera mounting rail 311; Second rail 312; Second rail slider 313; Rail mounting plate 314; Module mounting plate 315; Third camera support component 316.

[0017] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This utility model proposes a visual inspection device for PCB board wave soldering post-cone soldering, such as Figures 1 to 4 As shown, a preferred embodiment of the PCB board wave soldering post-visual inspection device of this utility model includes a housing 1, a PCB conveyor line 2, and a visual inspection device 3.

[0020] The outer shell 1 includes a frame 101, a middle support plate 114 and a bottom support plate 115 are disposed inside the frame 101, and a vision processor 116 is disposed at the bottom of the outer shell 1. The PCB conveyor line 2 is set on the intermediate support plate 114 and includes a conveyor mechanism with adjustable width and a clamping mechanism 208. The clamping mechanism 208 is set on the conveyor mechanism and is used to clamp the PCB board 216. The visual inspection device 3 is mounted on the bottom support plate 115. The visual inspection device is used to take pictures of the PCB board 216, and the visual processor 116 is used to identify wave soldering defects on the PCB board 216.

[0021] Specifically, in this embodiment, the conveying mechanism includes: a first fixed bracket 201, a second fixed bracket 212, a front plate of the conveying line 202, a rear plate of the conveying line 206, a first guide rail 207, a first guide rail slider 204, a support plate 210, a lead screw 211, a lead screw nut 217, and a motor 209.

[0022] The first guide rail 207 is mounted on the intermediate support plate 114. The front plate 202 of the conveyor line is mounted on the intermediate support plate 114 via the first fixed bracket 201 and the second fixed bracket 212, and is perpendicular to the first guide rail 207. The rear plate 206 of the conveyor line is slidably mounted on the first guide rail 207 via the first guide rail slider 204. The clamping mechanism 208 is mounted on the rear plate 206 of the conveyor line. The support plate 210 is fixed on the intermediate support plate 114. The motor 209 is fixed on the support plate 210. The lead screw nut 217 is fixed on the rear plate 206 of the conveyor line. The lead screw 211 passes through the lead screw nut 217, and its two ends are fixed on the bearings of the front plate 202 and the rear plate 206 of the conveyor line, respectively.

[0023] The PCB conveyor line 2 also includes a first sensor 203, a second sensor 213, a baffle 214, a blocking cylinder 215, and conveying rollers 205 and roller drive mechanisms disposed at the bottom of the front plate 202 and the rear plate 206 of the conveyor line.

[0024] The first sensor 203, the second sensor 213, and the blocking cylinder 215 are mounted on the front plate 202 of the conveyor line, and 214 is mounted on the blocking cylinder 215.

[0025] The visual inspection device 3 includes: several support members 301, a guide rail mounting plate 314, a second guide rail 312, a second guide rail slider 313, a module mounting plate 315, an X-axis module 307, a Y-axis module 302, a Y-axis module slider 303, a first camera support member 304, a second camera support member 305, a third camera support member 316, a camera fixing plate 310, a camera fixing guide rail 311, a multi-color light 306, a lens 308, and a camera 309.

[0026] Guide rail mounting plate 314 and module mounting plate 315 are arranged parallel to each other on several support members. Second guide rail 312 is mounted on guide rail mounting plate 314. X-axis module 307 is mounted on module mounting plate 315. Second guide rail slider 313 is mounted on second guide rail 312. X-axis module 307 has an X-axis module slider. Both ends of Y-axis module 302 are connected to the second guide rail slider 313 and the X-axis module slider, respectively. The Y-axis module slider 303 is mounted on the Y-axis module 302. The first camera support 304 is fixed on the Y-axis module slider 303. The second camera support 305 is fixed on the first camera support 304. The multi-color light 306 is fixed on the second camera support 305. The third camera support 316 is fixed on the second camera support 305. The camera fixing rail 311 is fixed on the third camera support 316. A slider is fixed on the camera fixing rail 311. A camera fixing plate 310 is fixed on the slider. A camera 309 is fixed on the camera fixing plate 310. A lens 308 is mounted on the camera 309.

[0027] The frame 101 has a lower front door 102 and an upper front door 104 on its front side. A semi-transparent observation window 103 is located on the upper front door 104, and a button indicator light 105 is located near the upper front door 104. An alarm indicator light 106 is located on the top of the frame 101. A display screen 107 and a mouse and keyboard 109 are mounted on one side of the frame 101 via a display screen bracket 108. A cooling fan 110 is located on the lower side of one side of the frame 101. The bottom of the frame 101 has foot supports 111 and bottom casters 112. An electrical isolation chamber 113 is also located inside the frame 101. The foot supports 111 are adjustable in height for easy docking with production lines of different heights. When the foot supports 111 are raised to a suitable height, the bottom casters 112 touch the ground, allowing the device to be pushed for easy transport.

[0028] The electrical isolation room 113 is equipped with miniature circuit breakers, relays, and terminals.

[0029] The working principle of the PCB board wave soldering post-visual inspection device of this utility model is introduced below.

[0030] This utility model PCB board wave soldering post-visual inspection device adopts a floor-mounted embedded production line installation. One end connects to the wave soldering post-line and the other end connects to the maintenance station. The wave soldered PCB board 216 is automatically fed into the production line for inspection, or it can be manually placed into the PCB board 216 for inspection. PCB board 216 enters the equipment from the left. When there is no PCB board 216, the conveyor roller 205 stops. When the first sensor 203 detects that a PCB board 216 is flowing in, the conveyor roller 205 starts to rotate. The blocking cylinder 215 drives the baffle 214 to move, and the PCB board 216 will be blocked when it moves to the imaging position. The second sensor 213 detects that the PCB board 216 is being conveyed, and the clamping mechanism 208 moves to fix the PCB board 216 at the imaging position. The X-axis module 307 and the Y-axis module 302 drive the camera 309 and the multi-color light 306 to move, triggering the camera to take pictures at multiple preset positions. The vision software processes the detection results, and the clamping mechanism 208 and the blocking mechanism are released. The PCB board 216 flows out to the inspection station. If a defect is detected, the display screen 107 displays the image and location of the defect point, and the maintenance station personnel can immediately perform inspection and repair, which is fast and convenient.

[0031] The X-axis module 307 and Y-axis module 302 are high-precision modules, and the camera 309 is a high-resolution color camera. During the inspection process, multiple photos are taken in a flying shooting mode, which is fast and has a short inspection time. The images taken from different areas of the PCB board 216 can be stitched together to form the entire PCB diagram after image processing, which can clearly capture welding defects and achieve high inspection accuracy.

[0032] The front plate 202 of the conveyor line is fixed, and the rear plate 206 of the conveyor line can change its front and rear positions as the lead screw 211 rotates. The width of the PCB board 216 can be input in the software and automatically adjusted to cope with the production of PCB boards 216 of different widths.

[0033] The first camera support 304, the second camera support 305, and the third camera support 316 have oval holes. The camera 309 and the light source 306 can move up and down as a whole to adjust the distance relative to the PCB board 216. The second guide rail slider can move up and down. The camera 309 is fixed on the second guide rail slider 313 and can be finely adjusted up and down.

[0034] Employing a multi-color light source 306, which typically uses an RGB three-color high-brightness LED array, combined with high-angle and low-angle light, allows the light source to illuminate objects from different angles, thus clearly presenting the details of objects at different levels and making the imaging more three-dimensional. In solder joint inspection, it can more accurately identify the fullness and defects of solder joints. By illuminating with three-color light at different angles, two-dimensional information can be presented in three dimensions, making the details of solder joints more clearly visible.

[0035] This device is equipped with a high-performance vision processor 116 and vision processing software. It uses AI deep learning algorithms to process images and adopts a leading deep learning defect detection model. By accurately locating defect positions and classifying defects, it can detect defects such as missing, extra, offset, reverse, wrong, and floating defects of plug-in components on electronic circuit boards. It can solve the problem of traditional algorithms only performing OK / NG coarse classification, achieving the effect of minimal manual review and helping factories save manpower.

[0036] The beneficial effects of this PCB board wave soldering post-visual inspection device are: This utility model, through the above technical solution, includes: a shell, comprising a frame, with a middle support plate and a bottom support plate disposed within the frame, and a vision processor disposed at the bottom of the shell; a PCB conveyor line, the PCB conveyor line being disposed on the middle support plate, including a width-adjustable conveying mechanism and a clamping mechanism, the clamping mechanism being disposed on the conveying mechanism for clamping the PCB board; and a vision inspection device, the vision inspection device being disposed on the bottom support plate, the vision inspection device being used to photograph the PCB board, and the vision processor being used to identify wave soldering defects on the PCB board, thereby improving the inspection efficiency and accuracy of wave soldering on the PCB board, and being applicable to PCB boards of different sizes.

[0037] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A visual inspection device for PCB board wave soldering post-continuation, characterized in that, include: The outer shell (1) includes a frame (101), in which a middle support plate (114) and a bottom support plate (115) are provided, and a vision processor (116) is provided at the bottom of the outer shell. PCB conveying line (2), the PCB conveying line (2) is disposed on the intermediate support plate (114), including a width adjustable conveying mechanism and a clamping mechanism (208), the clamping mechanism is disposed on the conveying mechanism and is used to clamp the PCB board (216). Visual inspection device (3); the visual inspection device (3) is set on the bottom support plate (115), the visual inspection device is used to take pictures of the PCB board (216), and the visual processor (116) is used to identify wave soldering defects of the PCB board (216).

2. The PCB board wave soldering post-visual inspection device according to claim 1, characterized in that, The conveying mechanism includes: a first fixed bracket (201), a second fixed bracket (212), a front plate of the conveying line (202), a rear plate of the conveying line (206), a first guide rail (207), a first guide rail slider (204), a support plate (210), a lead screw (211), a lead screw nut (217), and a motor (209). The first guide rail (207) is disposed on the intermediate support plate (114). The front plate of the conveyor line (202) is disposed on the intermediate support plate (114) through the first fixed bracket (201) and the second fixed bracket (212) and is perpendicular to the first guide rail (207). The rear plate of the conveyor line (206) is slidably disposed on the first guide rail (207) through the first guide rail slider (204). The clamping mechanism (208) is disposed on the rear plate of the conveyor line (206). The support plate (210) is fixed on the intermediate support plate (114). The motor (209) is fixed on the support plate (210). The lead screw nut (217) is fixed on the rear plate of the conveyor line (206). The lead screw (211) passes through the lead screw nut (217) and its two ends are respectively fixed on the bearings of the front plate of the conveyor line (202) and the rear plate of the conveyor line (206).

3. The PCB board wave soldering post-visual inspection device according to claim 2, characterized in that, The PCB conveyor line (2) also includes a first sensor (203), a second sensor (213), a baffle (214), a blocking cylinder (215), and conveyor rollers (205) disposed at the bottom of the front plate (202) and the rear plate (206) of the conveyor line. The first sensor (203), the second sensor (213), and the blocking cylinder (215) are disposed on the front plate (202) of the conveyor line, and the (214) is disposed on the blocking cylinder (215).

4. The PCB board wave soldering post-visual inspection device according to claim 3, characterized in that, The visual inspection device (3) includes: several support members (301), a guide rail mounting plate (314), a second guide rail (312), a second guide rail slider (313), a module mounting plate (315), an X-axis module (307), a Y-axis module (302), a Y-axis module slider (303), a first camera support member (304), a second camera support member (305), a third camera support member (316), a camera fixing plate (310), a camera fixing guide rail (311), a multi-color light (306), a lens (308), and a camera (309); The guide rail mounting plate (314) and the module mounting plate (315) are arranged parallel to each other on the plurality of support members. The second guide rail (312) is arranged on the guide rail mounting plate (314). The X-axis module (307) is arranged on the module mounting plate (315). The second guide rail slider (313) is arranged on the second guide rail (312). The X-axis module (307) is provided with an X-axis module slider. The two ends of the Y-axis module (302) are respectively connected to the second guide rail slider (313) and the X-axis module slider. The Y-axis module slider (303) is arranged on the Y-axis module (302). The first camera support member (304) is fixed. The second camera support (305) is fixed on the Y-axis module slider (304), the multicolor light (306) is fixed on the second camera support (305), the third camera support (316) is fixed on the second camera support (305), the camera fixing guide rail (311) is fixed on the third camera support (316), a slider is fixed on the camera fixing guide rail (311), the camera fixing plate (310) is fixed on the slider, the camera (309) is fixed on the camera fixing plate (310), and the lens (308) is mounted on the camera (309).

5. The PCB board wave soldering post-visual inspection device according to claim 4, characterized in that, The frame (101) has a front lower door (102) and a front upper door (104) on its front side. A semi-transparent observation window (103) is provided on the front upper door (104). A button indicator light (105) is provided near the front upper door (104). An alarm indicator light (106) is provided on the top of the frame (101). A display screen (107) and a mouse and keyboard (109) are provided on one side of the frame (101) via a display screen bracket (108). A cooling fan (110) is provided on the lower side of one side of the frame (101). A foot support (111) and bottom casters (112) are provided at the bottom of the frame (101). An electrical isolation chamber (113) is also provided inside the frame (101).

6. The PCB board wave soldering post-visual inspection device according to claim 5, characterized in that, The electrical isolation room (113) is equipped with miniature circuit breakers, relays, and terminals.

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