A kind of spot visual detection device and contain above-mentioned device's conductive cloth welding machine

Abstract

The utility model discloses a kind of welding spot visual inspection device and the conductive cloth welding machine containing the device. The welding spot visual inspection device includes cylindrical protective shell, protective shell backplate and built-in equipment;Built-in equipment contains camera fixed by connecting plate and annular light source coaxially arranged, annular light source middle part is left with through-hole for camera line of sight to pass through;The top of protective shell is provided with the opening for cable tube access, side surface is provided with spare auxiliary interface and signal line interface. The device realizes shadowless uniform illumination through coaxial light path design, effectively resists welding environmental interference in combination with fully-enclosed protective structure;Modular quick-release design is convenient for maintenance replacement. The conductive cloth welding machine integrated with the device realizes online accurate positioning of welding spot, high-quality image acquisition and automatic quality analysis through the collaborative work of visual inspection system and motion platform, significantly improves the detection efficiency, accuracy and automation level of conductive cloth welding quality.

Description

Technical Field

[0001] This utility model belongs to the field of machine vision and electronic component assembly technology, and specifically relates to a solder joint quality inspection device for automated welding equipment, specifically a solder joint visual inspection device integrated on a conductive cloth welding machine. Background Technology

[0002] In the field of precision electronic component assembly, especially in the automated welding process of flexible electromagnetic shielding components such as conductive cloth, online inspection of solder joint quality is a crucial step in ensuring product reliability. The welding process must meet multiple stringent requirements: the inspection system must possess micron-level positioning accuracy, stability against industrial environmental interference, millisecond-level image acquisition and processing capabilities, and ease of maintenance for long-term operation. Traditional manual visual inspection methods suffer from a core contradiction—to improve inspection accuracy, experienced operators are required to work continuously, which leads to low inspection efficiency and difficulty in standardizing evaluation criteria; while general-purpose industrial vision systems can achieve basic inspection functions, they generally lack protective designs against welding spatter and dust contamination, and fail to optimize high integration with welding equipment.

[0003] Current mainstream technologies have significant limitations: while separate installation of ordinary industrial cameras and light sources can achieve basic imaging, they suffer from large installation volume, susceptibility to optical path interference, and insufficient stability on high-speed moving platforms; some integrated vision systems encapsulate the camera and light source, but often use diffuse or side-mounted light sources, making it difficult to eliminate reflective interference from solder joint surfaces, affecting image quality consistency. Furthermore, existing vision inspection devices often lack modular design, leading to difficulties in maintenance and replacement, and chaotic cable management can easily cause signal transmission failures during high-speed equipment movement.

[0004] Therefore, there is an urgent need to develop a dedicated weld point visual inspection device that integrates a coaxial ring light source, a modular quick-release structure, and an all-around protective shell. By optimizing the optical path design and mechanical structure, it is possible to meet the needs of high-frequency and high-precision automated welding quality inspection. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a weld joint visual inspection device and a conductive cloth welding machine containing the above-mentioned device. This weld joint visual inspection device, through the integrated design of a coaxial ring light source and camera, combined with a modular quick-release structure and an all-around protective shell, achieves high uniformity and shadow-free image acquisition of weld joints. It also enhances the equipment's anti-interference capability and ease of maintenance in industrial environments, effectively solving the problem of insufficient detection accuracy caused by uneven lighting and external interference, and significantly improving the accuracy, stability, and overall efficiency of weld joint quality inspection.

[0006] This utility model includes the following technical solutions: A visual inspection device for solder joints includes a cable conduit, a spare auxiliary interface, a signal line interface, a protective housing, an opening, a light source protective cover, a protective housing back plate, a back plate through hole, built-in equipment, a connecting plate, a camera, and a light source. The protective shell is a cylindrical structure, with a rectangular protective shell back plate fixedly installed on one side. The built-in device is located inside the protective housing and includes a connecting plate, a camera, and a light source; The connecting plate is fixedly installed on the inner side of the back plate of the protective shell; The camera is fixedly mounted on the connecting plate; The light source is a ring light source, which is coaxially fixedly installed at the lower end of the camera lens. The ring light source has a through hole in the middle to allow the camera's line of sight to pass through. The top of the protective housing is provided with the opening, and the cable tube extends into the interior of the protective housing through the opening and connects to the built-in device; The spare auxiliary interface and signal line interface are both located on the side of the protective housing; The protective shell back plate is provided with the back plate through hole.

[0007] Furthermore, in the aforementioned weld point visual inspection device, the protective shell and the protective shell back plate are made of aluminum alloy or stainless steel.

[0008] Furthermore, in the aforementioned visual inspection device for solder joints, the material of the light source protective cover is transparent or semi-transparent high-temperature resistant glass or polycarbonate.

[0009] Furthermore, in the aforementioned weld point visual inspection device, the connecting plate is fixed to the protective shell back plate via a threaded connection or a quick-release structure.

[0010] Furthermore, in the aforementioned visual inspection device for solder joints, the camera is a CCD camera or a CMOS camera.

[0011] Furthermore, in the aforementioned weld joint visual inspection device, the light source is a white ring-shaped LED light source with a color temperature range of 5000K-6500K.

[0012] Furthermore, in the aforementioned weld joint visual inspection device, both the spare auxiliary interface and the signal line interface are waterproof, and the cable conduit is a flexible metal tube with a bend protection joint.

[0013] This utility model also discloses a conductive cloth welding machine, which includes the weld point visual inspection device described in any of the above-mentioned claims.

[0014] Furthermore, the aforementioned conductive cloth welding machine is characterized by comprising a base, an X-axis slide rail, a welding platform, a top cover, a Y-axis slide rail, a Y-axis moving device, a Y-axis mounting back plate, a heat insulation paper feeding tray, an operation screen, an information display screen, a solder paste extrusion device, a welding head, and a solder joint visual inspection device. The heat insulation paper feeding tray, solder paste extrusion device, soldering head and solder joint visual inspection device are mounted on the Y-axis mounting back plate. The Y-axis mounting backplate is mounted on the Y-axis moving device, and the Y-axis moving device is mounted on the Y-axis slide rail of the top cover; Side plates are provided on the left and right sides of the top cover, and are installed on both sides of the base through the side plates; The operation screen and the information display screen are mounted on one of the side panels; An X-axis slide rail is mounted on the base, and a rectangular welding platform is mounted on the X-axis slide rail. The welding platform is located below the Y-axis slide rail of the top cover.

[0015] This utility model also discloses the working method of the above-mentioned conductive cloth welding machine, including the following steps: S1 fixes the workpiece to be welded on the welding platform; S2 moves the solder paste extrusion device to a predetermined position via the Y-axis motion system, and extrudes solder paste quantitatively by air pressure or mechanical pushing. The S3 welding head moves to the welding position to complete the welding operation of the conductive cloth; The S4 solder joint visual inspection device acquires real-time images of solder joints, and performs quality analysis manually (remotely) or automatically. S5 can be manually or automatically adjusted based on the test results; After welding is completed, the welding platform automatically moves out and the finished product is removed.

[0016] Compared with the prior art, this utility model has the following outstanding advantages: This invention integrates a coaxial ring light source and camera into a protective housing, creating a precision vision unit specifically designed for weld joint quality inspection. Its advantages are as follows: First, the coaxial optical path design of the ring light source and camera lens achieves shadow-free, uniform illumination of the weld joint surface, effectively eliminating interference from metal surface reflections and ensuring high-quality and consistent image acquisition, laying a reliable foundation for accurate weld joint defect identification. Second, the fully enclosed protective structure formed by the protective housing and light source shield effectively isolates spatter and industrial dust from the welding area, ensuring the long-term stable operation of internal optical components in harsh environments; simultaneously, standardized cable management and waterproof interface design improve the reliability of signal transmission during high-speed movement. Third, the connecting plate is fixed through a quick-release structure, and the modular internal layout makes maintenance and replacement of the camera and light source more convenient, significantly reducing equipment downtime and enhancing the applicability and overall efficiency of the inspection system. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall weld joint visual inspection device described in this utility model; Figure 2 Front view of the weld joint visual inspection device described in this utility model; Figure 3 A schematic diagram of the built-in device described in this utility model; Figure 4 An overall schematic diagram of the conductive cloth welding machine described in this utility model; Figure 5 A front view of the conductive cloth welding machine described in this utility model.

[0018] In the diagram: Base 100, X-axis slide rail 110, welding platform 120, top cover 200, Y-axis slide rail 210, Y-axis moving device 220, Y-axis mounting back plate 230, heat insulation paper feeding tray 231, paper feeding tray guide wheel 232, heat insulation paper tightening device 233, paper receiving device 234, operation screen 240, information display screen 250, solder paste extrusion device 300, solder paste syringe 310, syringe back plate 320, through hole 321, U-shaped connecting plate 330, solder needle 340, syringe top interface 350. Syringe mounting plate 360, cable connector 361, welding head 400, welding head body 410, replaceable welding head 420, welding machine drive device 430, cable chain 440, cable box 450, weld point visual inspection device 500, cable conduit 501, spare auxiliary interface 502, signal line interface 503, protective shell 510, opening 520, light source protective cover 530, protective shell back plate 540, back plate through hole 541, built-in device 550, connecting plate 551, camera 552, light source 553. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Example 1 like Figure 1-3 As shown, a weld point visual inspection device 500 is characterized by comprising a cable conduit 501, a spare auxiliary interface 502, a signal line interface 503, a protective shell 510, an opening 520, a light source protective cover 530, a protective shell back plate 540, a back plate through hole 541, a built-in device 550, a connecting plate 551, a camera 552, and a light source 553. The protective shell 510 has a cylindrical structure, and a rectangular protective shell back plate 540 is fixedly installed on one side of it. The built-in device 550 is disposed inside the protective housing 510, and includes a connecting plate 551, a camera 552 and a light source 553; The connecting plate 551 is fixedly installed on the inner side of the protective shell back plate 540; The camera 552 is fixedly mounted on the connecting plate 551; The light source 553 is a ring light source, which is coaxially fixedly installed at the lower end of the lens of the camera 552. The ring light source has a through hole in the middle to allow the line of sight of the camera 552 to pass through. The top of the protective housing 510 is provided with the opening 520, and the cable tube 501 extends into the interior of the protective housing 510 through the opening 520 and is connected to the built-in device 550. The spare auxiliary interface 502 and the signal line interface 503 are both located on the side of the protective housing 510; The protective shell back plate 540 is provided with the back plate through hole 541.

[0021] Example 2 like Figure 1-3 As shown, a weld point visual inspection device 500 is characterized by comprising a cable conduit 501, a spare auxiliary interface 502, a signal line interface 503, a protective shell 510, an opening 520, a light source protective cover 530, a protective shell back plate 540, a back plate through hole 541, a built-in device 550, a connecting plate 551, a camera 552, and a light source 553. The protective shell 510 has a cylindrical structure, and a rectangular protective shell back plate 540 is fixedly installed on one side of it. The built-in device 550 is disposed inside the protective housing 510, and includes a connecting plate 551, a camera 552 and a light source 553; The connecting plate 551 is fixedly installed on the inner side of the protective shell back plate 540; The camera 552 is fixedly mounted on the connecting plate 551; The light source 553 is a ring light source, which is coaxially fixedly installed at the lower end of the lens of the camera 552. The ring light source has a through hole in the middle to allow the line of sight of the camera 552 to pass through. The top of the protective housing 510 is provided with the opening 520, and the cable tube 501 extends into the interior of the protective housing 510 through the opening 520 and is connected to the built-in device 550. The spare auxiliary interface 502 and the signal line interface 503 are both located on the side of the protective housing 510; The protective shell back plate 540 is provided with the back plate through hole 541. Preferably, the protective shell 510 and the protective shell back plate 540 are made of aluminum alloy or stainless steel; Preferably, the material of the light source protective cover 530 is transparent or translucent high-temperature resistant glass or polycarbonate; Preferably, the connecting plate 551 is fixed to the protective shell back plate 540 by a threaded connection or a quick-release structure; Preferably, the camera 552 is a CCD camera or a CMOS camera; Preferably, the light source 553 is a white ring-shaped LED light source with a color temperature range of 5000K-6500K; Preferably, both the backup auxiliary interface 502 and the signal line interface 503 are waterproof interfaces, and the cable conduit 501 is a flexible metal tube with a bend protection joint.

[0022] This embodiment also discloses the following workflow of the above-mentioned weld joint visual inspection device: 1. System initialization and self-test: After the device is powered on, the built-in device 550 starts up and performs a self-test, while the camera 552 and the light source 553 complete initialization. The signal is transmitted to the main control system through the signal line interface 503, and after confirming that the device is in normal condition, it enters the standby state.

[0023] 2. Solder joint positioning and image acquisition preparation: The conductive cloth welding machine controls the Y-axis movement device 220 to move the weld point visual inspection device 500, which is mounted on the Y-axis mounting back plate 230, to a predetermined inspection position above the welding platform 120. The cable conduit 501 flexibly bends as it moves, ensuring stable power and signal transmission.

[0024] 3. Coaxial illumination and image capture: Upon reaching the detection position, the ring light source 553 activates, emitting uniform light with a specific color temperature (e.g., 5000K-6500K). After reflection from the solder joint surface, the light enters the lens of the camera 552 through a through-hole in the center of the light source 553. Under optimized coaxial illumination conditions, the camera 552 acquires high-resolution images of the solder joint.

[0025] 4. Image data transmission and analysis: The acquired image data is transmitted in real time to the welding machine's processing system via signal line interface 503. The system runs image processing algorithms to automatically analyze the shape, size, position, and integrity of the weld joints and compare them with standard parameters.

[0026] 5. Results Feedback and Process Adjustment: The analysis results are fed back to the control system in real time. If defects are detected in the solder joints (such as cold solder joints, misalignment, insufficient solder, etc.), the system can immediately issue an alarm and can also link the soldering head 400 or the solder paste extrusion device 300 to automatically compensate and adjust the subsequent soldering process parameters.

[0027] 6. Cyclic testing and maintenance: After the inspection of one weld point is completed, the device moves to the next inspection point with the motion system, repeating steps 3 to 5 to achieve continuous automated inspection. When maintenance or replacement is required, the protective shell backplate 540 can be easily removed to quickly replace or clean the camera 552 or light source 553 on the connecting plate 551.

[0028] Example 3 like Figure 4 and 5 As shown, a conductive cloth welding machine includes a weld point visual inspection device 500 as described in Example 1 or 2. Includes a base 100, an X-axis slide rail 110, a welding platform 120, a top cover 200, a Y-axis slide rail 210, a Y-axis moving device 220, a Y-axis mounting back plate 230, a heat insulation paper feeding tray 231, an operation screen 240, an information display screen 250, a solder paste extrusion device 300, a welding head 400, and a solder joint visual inspection device 500; The heat insulation paper feeding tray 231, solder paste extrusion device 300, soldering head 400 and solder joint visual inspection device 500 are mounted on the Y-axis mounting back plate 230. The Y-axis mounting backplate 230 is mounted on the Y-axis moving device 220, and the Y-axis moving device 220 is mounted on the Y-axis slide rail 210 of the top cover 200; The top cover 200 is provided with side plates on the left and right sides, and is installed on both sides of the base 100 through the side plates; The operation screen 240 and the information display screen 250 are mounted on one of the side panels; An X-axis slide rail 110 is mounted on the base 100, and a rectangular welding platform 120 is mounted on the X-axis slide rail 110. The welding platform 120 is located below the Y-axis slide rail 210 of the top cover 200.

[0029] The working method of the above-mentioned conductive cloth welding machine includes the following steps: S1 fixes the workpiece to be welded on the welding platform; S2 moves the solder paste extrusion device to a predetermined position via the Y-axis motion system, and extrudes solder paste quantitatively by air pressure or mechanical pushing. The S3 welding head moves to the welding position to complete the welding operation of the conductive cloth; The S4 solder joint visual inspection device acquires real-time images of solder joints, and performs quality analysis manually (remotely) or automatically. S5 can be manually or automatically adjusted based on the test results; After welding is completed, the welding platform automatically moves out and the finished product is removed.

[0030] It is worth noting that the above description of the embodiments focuses on interpreting the technical solution of this utility model, rather than precisely defining its protection scope. Those skilled in the art should understand that appropriate adjustments and optimizations can be made based on the technical details disclosed in the embodiments of this utility model, or equivalent substitutions can be implemented for individual or even all technical elements. Such adjustments and substitutions will not deviate from the core essence of the technical solution of this utility model and should be included within the technical protection scope of the embodiments of this utility model. In short, the protection of this utility model should not be limited to the concrete presentation of the above embodiments, but broadly covers all equivalent changes and improvements that do not contradict its basic concept. In summary, the protection definition of this utility model should be based on the statement of the claims, and the above embodiments are only used as a reference guide for understanding this utility model.

Claims

1. A visual inspection device for solder joints (500), characterized in that, Includes cable conduit (501), spare auxiliary interface (502), signal line interface (503), protective housing (510), opening (520), light source protective cover (530), protective housing back plate (540), back plate through hole (541), built-in device (550), connecting plate (551), camera (552), and light source (553); The protective shell (510) is a cylindrical structure, and a rectangular protective shell back plate (540) is fixedly installed on one side of it. The built-in device (550) is disposed inside the protective housing (510) and includes a connecting plate (551), a camera (552) and a light source (553). The connecting plate (551) is fixedly installed on the inner side of the protective shell back plate (540); The camera (552) is fixedly mounted on the connecting plate (551); The light source (553) is a ring light source, which is coaxially fixedly installed at the lower end of the lens of the camera (552). The ring light source has a through hole in the middle so that the line of sight of the camera (552) can pass through. The top of the protective housing (510) is provided with the opening (520), and the cable conduit (501) extends into the interior of the protective housing (510) through the opening (520) and connects to the built-in device (550). The spare auxiliary interface (502) and the signal line interface (503) are both located on the side of the protective housing (510); The protective shell back plate (540) is provided with the back plate through hole (541).

2. The weld joint visual inspection device according to claim 1, characterized in that, The protective shell (510) and the protective shell back plate (540) are made of aluminum alloy or stainless steel.

3. The weld joint visual inspection device according to claim 1, characterized in that, The material of the light source protective cover (530) is transparent or semi-transparent high-temperature resistant glass or polycarbonate.

4. The weld joint visual inspection device according to claim 1, characterized in that, The connecting plate (551) is fixed to the back plate (540) of the protective shell by means of a threaded connection or a quick-release structure.

5. The weld joint visual inspection device according to claim 1, characterized in that, The camera (552) is a CCD camera or a CMOS camera.

6. The weld joint visual inspection device according to claim 1, characterized in that, The light source (553) is a white ring-shaped LED light source with a color temperature range of 5000K-6500K.

7. The weld joint visual inspection device according to claim 1, characterized in that, The backup auxiliary interface (502) and the signal line interface (503) are both waterproof interfaces, and the cable conduit (501) is a flexible metal tube with a bend protection joint.

8. A conductive cloth welding machine, characterized in that, It includes a weld joint visual inspection device (500) as described in any one of claims 1-7.

9. The conductive cloth welding machine according to claim 8, characterized in that, Includes a base (100), an X-axis slide rail (110), a welding platform (120), a top cover (200), a Y-axis slide rail (210), a Y-axis moving device (220), a Y-axis mounting back plate (230), a heat insulation paper feeding tray (231), an operation screen (240), an information display screen (250), a solder paste extrusion device (300), a welding head (400), and a solder joint visual inspection device (500); The heat insulation paper feeding tray (231), solder paste extrusion device (300), soldering head (400) and solder joint visual inspection device (500) are mounted on the Y-axis mounting back plate (230). The Y-axis mounting backplate (230) is mounted on the Y-axis moving device (220), and the Y-axis moving device (220) is mounted on the Y-axis slide rail (210) of the top cover (200); The top cover (200) is provided with side plates on the left and right sides, and is installed on both sides of the base (100) through the side plates; The operation screen (240) and the information display screen (250) are mounted on one of the side panels; An X-axis slide rail (110) is mounted on the base (100), and a rectangular welding platform (120) is mounted on the X-axis slide rail (110). The welding platform (120) is located below the Y-axis slide rail (210) of the top cover (200).

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