Double-track tin soldering lug appearance detection machine

Abstract

The utility model provides a double-track tin soldering lug appearance detector. The double-track tin soldering lug appearance detector comprises at least two groups of visual detection assemblies, the vibration charging tray is provided with a feeding rail, and the end part of the feeding rail is provided with at least two paths of conveying ends; the conveying end is positioned at the upper end of the transparent turntable; when the transparent turntable rotates, the material conveying end has at least two material tracks relative to the transparent turntable; wherein each visual detection assembly correspondingly passes through one of the material tracks; each visual detection assembly comprises a first detection station, a second detection station and a third detection station which are arranged in sequence; and the relative positions of the visual camera and the tin soldering lug to be detected at each detection station are different. The surface of the to-be-detected tin soldering lug can be detected from different angles, the problems of misjudgment or missing detection and the like possibly caused by a single-view-angle camera are avoided, and the detection precision and accuracy are ensured.

Description

Technical Field

[0001] This utility model relates to the field of visual inspection equipment technology, and in particular to a dual-track tin solder sheet appearance inspection machine. Background Technology

[0002] With the development of technology, visual cameras are increasingly used in industrial production, such as visual inspection. They are used to replace manual labor in inspecting the appearance of products, thereby improving work efficiency and preventing errors caused by human visual fatigue. They also have the advantage of being able to work continuously for a long time.

[0003] Solder pads are key materials in electronic packaging and precision soldering, primarily used in microelectronic devices, optoelectronic devices, and BGA packaging. Solder pads may have defects such as surface bumps, pits, deep scratches, missing material, and blackening due to dirt. These defects directly lead to poor electrical contact, reduced mechanical strength, and soldering failure. They also accelerate oxidation and corrosion, compromise packaging hermeticity, significantly shorten device lifespan, and pose safety hazards. Blackening due to dirt also reduces product appearance yield, impacting market competitiveness.

[0004] Currently, the inspection of solder pads relies on either manual visual inspection, which is inefficient and hinders efficiency improvement, or traditional visual inspection agencies using single cameras, which are prone to false positives and false negatives, potentially affecting overall product quality and yield. Furthermore, the efficiency of single-camera inspection still needs improvement. Therefore, this invention proposes a dual-track solder pad appearance inspection machine to at least partially address the problems inherent in the existing technology. Utility Model Content

[0005] In view of the above problems, this utility model is proposed to provide a dual-track tin solder sheet appearance inspection machine that overcomes or at least partially solves the above problems.

[0006] To address the aforementioned issues, this utility model discloses a dual-track solder sheet appearance inspection machine, comprising at least two sets of visual inspection components;

[0007] A vibrating feeder is provided with a feeding rail, the end of which has at least two feeding ends;

[0008] The feeding end is located at the upper end of the transparent turntable; when the transparent turntable rotates, the feeding end has at least two material trajectories relative to the transparent turntable;

[0009] Each group of visual detection components corresponds to passing through one of the material trajectories;

[0010] Each set of vision inspection components includes a first inspection station, a second inspection station, and a third inspection station arranged in sequence; and the relative positions of the vision camera and the solder sheet to be inspected are different at each inspection station.

[0011] Optionally, the visual camera and light source of the first detection station are opposite each other and are located at the upper and lower ends of the transparent turntable, respectively;

[0012] The visual camera and light source of the second detection station are located at the upper end of the transparent turntable, and the visual camera is located at the upper end of the light source;

[0013] The visual camera and light source of the third inspection station are located at the lower end of the transparent turntable, and the visual camera is located at the lower end of the light source.

[0014] Optionally, the visual camera is a 1.3-megapixel monochrome AS camera;

[0015] The distance between the lens of the vision camera at the first detection station and the transparent turntable is 110±30mm;

[0016] The visual cameras at the second and third inspection stations are 230±30mm away from the transparent turntable;

[0017] The light sources of the second and third detection stations are 100±30mm away from the transparent turntable.

[0018] Optionally, the light source is a parallel light source.

[0019] Optionally, at least the light source at the first detection station is a blue backlight.

[0020] Optionally, the vibrating feeder further includes a storage hopper;

[0021] The discharge port of the storage hopper is located at the upper end of the vibrating plate;

[0022] Both the vibrating plate and the storage hopper are mounted on the material rack.

[0023] Optionally, it may also include a cabinet;

[0024] The transparent turntable is located inside the cabinet.

[0025] The cabinet has a window on one side, and the feeding rail extends from the window to the transparent turntable.

[0026] Optionally, a lighthouse is provided at the top of the cabinet.

[0027] Optionally, the lower end of the cabinet is equipped with casters.

[0028] Optionally, the transparent turntable is further provided with a receiving mechanism at the end of each group of vision inspection components.

[0029] This utility model has the following advantages:

[0030] The system utilizes at least two sets of visual inspection components; a vibrating tray equipped with a feeding rail, the end of which has at least two feeding ends; these feeding ends are located on the upper end of a transparent turntable; as the transparent turntable rotates, the feeding ends travel along at least two material tracks relative to the turntable; each set of visual inspection components passes through one of these material tracks; each set of visual inspection components includes a first inspection station, a second inspection station, and a third inspection station arranged sequentially; and the relative positions of the visual camera and the solder sheet to be inspected are different at each inspection station. This allows for inspection of the surface of the solder sheet from different angles, avoiding potential misjudgments or missed detections that may occur with a single-view camera, thus ensuring the accuracy and precision of the inspection. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the basic structure of a dual-track solder sheet appearance inspection machine provided in one embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the first station visual inspection component structure of a dual-track solder sheet appearance inspection machine provided in one embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the second station visual inspection component of a dual-track solder sheet appearance inspection machine according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the third station visual inspection component of a dual-track solder sheet appearance inspection machine according to an embodiment of the present invention.

[0035] Figure 5 This is a schematic diagram of the overall structure of a dual-track tin solder sheet appearance inspection machine provided in one embodiment of this utility model.

[0036] In the diagram: 100, visual inspection component; 101, visual camera; 102, light source; 200, transparent turntable; 201, cabinet; 202, lighthouse; 203, caster wheel; 210, solder sheet; 301, feeding rail; 302, vibrating plate; 303, storage hopper; 400, receiving mechanism. Detailed Implementation

[0037] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figures 1 to 3 This diagram illustrates a structural schematic of an embodiment of a dual-track solder sheet appearance inspection machine of the present invention, comprising: at least two sets of vision inspection components 100; a vibrating material tray 300, which is provided with a feeding rail 301, the end of which has at least two feeding ends; the feeding ends are located on the upper end of a transparent turntable 200; when the transparent turntable 200 rotates, the feeding ends have at least two material tracks relative to the transparent turntable 200; wherein each set of vision inspection components 100 passes through one of the material tracks; each set of vision inspection components 100 includes a first inspection station, a second inspection station, and a third inspection station arranged sequentially; and the relative positions of the vision camera 101 and the solder sheet 210 to be inspected are different at each inspection station.

[0039] The aforementioned feeding rail 301 is a single feeding rail with two parallel feeding troughs, two parallel feeding rails, or a single feeding rail. It has two or more branches at the end so that it can output at least two paths. In this application, two output paths are preferred, so that two material tracks of the solder sheet 210 to be inspected can be formed on the transparent turntable 200. Each set of vision inspection components 100 inspects the material on one track. Each set of vision inspection components 100 has three vision cameras 101 at different positions, which can inspect the surface of the solder sheet 210 to be inspected from different angles, avoiding the problems of misjudgment or missed detection that may occur with a single-view camera, and ensuring the accuracy and precision of the inspection. For example, when the surface of the solder sheet 210 is touched by a foreign object and slightly rubbed, it may leave marks, but this does not affect the product quality. However, when inspected by a single vision camera, the product may be detected as a defective product. For another example, deep scratches or missing materials on the oblique side or back side are generally not detectable by existing single vision cameras, or multiple inspection processes are required to detect them, which is not conducive to improving production efficiency.

[0040] In this application, at least two sets of vision inspection components are used in conjunction with two material feeding ends to form a parallel inspection channel, improving inspection efficiency by more than 100%. Each set is equipped with three vision cameras at different workstations to achieve multi-angle three-dimensional inspection (top view, side view, and bottom view), reducing the missed detection rate to below 0.5%. The differentiated perspective design effectively distinguishes between functional defects (such as deep scratches) and non-functional marks (slight surface friction), reducing the false judgment rate by up to 60%. The design of the above-mentioned transparent turntable 200 and the material trajectory ensures the continuity of the inspection process, increasing production capacity by 300% compared with traditional manual inspection.

[0041] In one embodiment of this application, the visual camera 101 and the light source 102 of the first detection station are opposite to each other and are located at the upper and lower ends of the transparent turntable 200, respectively; the visual camera 101 and the light source 102 of the second detection station are located at the upper end of the transparent turntable 200, and the visual camera 101 is located at the upper end of the light source 102; the visual camera 101 and the light source 102 of the third detection station are located at the lower end of the transparent turntable 200, and the visual camera 101 is located at the lower end of the light source 102.

[0042] The first station's up-and-down through-beam lighting can clearly capture surface microcracks (detection accuracy up to 0.02mm), the second station's high-angle light source on the same side can effectively detect edge burrs (detection angle covers ±15°), and the third station's bottom backlight can identify thickness deviations (accuracy ±0.05mm). Through multi-station collaborative detection, the three-dimensional defect detection rate is increased to 99.7%.

[0043] Furthermore, the visual camera 101 is a 1.3-megapixel monochrome AS camera; the lens of the visual camera 101 at the first detection station is 110±30mm away from the transparent turntable 200; the visual cameras 101 at the second and third detection stations are 230±30mm away from the transparent turntable 200; the light source 102 at the second and third detection stations is 100±30mm away from the transparent turntable 200.

[0044] In the first workstation mentioned above, the visual camera 101 is an AS camera, preferably an AS-S013-G camera equipped with an AS-T08110 lens, mainly used for detecting the length and dimensions of products, with a resolution of 0.011mm. A working distance of 110mm ensures high-resolution imaging (single pixel accuracy 0.01mm) for the first workstation, with a viewing angle of up to 15*12mm. The preferred light source is AS-BL7070-B. In the second and third workstations mentioned above, an AS-5014H lens is used, with the preferred light source being AS-CO70-W, a resolution of 0.0128mm, and a viewing angle of up to 16.5*11mm. A 230mm mid-range detection distance meets the large depth-of-field requirements of the second and third workstations, and a 100mm light source distance optimizes the uniformity of the light field (illuminance difference <5%). A monochrome AS camera is used to balance the detection speed (0.1s / piece) and cost.

[0045] In one embodiment of this application, the light source 102 is a parallel light source. This parallel light source eliminates diffuse reflection interference, improves defect edge contrast, ensures consistency of the detection light field, and adapts to high-speed motion detection.

[0046] Furthermore, at least the light source 102 at the first detection station is a blue backlight. Because the blue light emitted by the blue light source has short wavelength characteristics, it can enhance the imaging of fine surface defects, significantly improve sensitivity, reduce interference from metal surface reflections, and extend the lifespan of the light source.

[0047] In one embodiment of this application, the vibrating feeder 300 further includes a storage hopper 303; the outlet of the storage hopper 303 is located at the upper end of the vibrating feeder 302; both the vibrating feeder 302 and the storage hopper 303 are mounted on a material rack. Stable material supply is achieved through the above-mentioned double-feeding trough design, and the storage hopper 303 can replenish the material in the vibrating feeder 302 in a timely manner.

[0048] Furthermore, it also includes a cabinet 201; the transparent turntable 200 is disposed inside the cabinet 201; a window is provided on one side of the cabinet 201, and the feeding rail 301 extends from the window to the transparent turntable 200. The cabinet 201 forms a closed detection environment, eliminating external light interference, optimizing the material flow path through the window structure design, and at the same time, the cabinet 201 can also prevent dust and extend the life of optical components.

[0049] The upper part of the cabinet 201 is equipped with a lighthouse 202. For example, the three-color lighthouse 202 can provide real-time status indication, thereby enabling rapid location of abnormal states and visual monitoring of production cycle. The lower part of the cabinet 201 is equipped with casters 203. The casters 203 enable rapid deployment of equipment and have a self-locking structure, which ensures detection stability and adapts to flexible production layouts.

[0050] The aforementioned transparent turntable 200 is located at the end of each group of vision inspection components 100 and is further equipped with a receiving mechanism 400. The receiving mechanism 400 realizes a fully automatic process of feeding, inspection, and receiving. The material is fed through the vibrating tray 100, the product is sensed by fiber optics, and then the electrical control triggers the camera to take a picture. The vision system processes the image and determines whether the solder sheet 210 is OK or NG based on the visual feedback signal. Based on the OK or NG signal, air blowing is triggered to blow away the NG products and keep the OK products. The receiving mechanism 400 then collects the materials, realizing the integration of feeding, inspection, rejection of defective products, and collection of good products into one.

[0051] It should be noted that the aforementioned transparent turntable 200 can be driven by a motor, and the motor's drive circuit is a conventional technical means, which will not be described in detail in this application.

[0052] By constructing a multi-dimensional detection system, the detection efficiency can be increased from 200 pcs / h to 2000 pcs / h using traditional manual methods, the defect detection rate can be increased from 85% to 99.5%, and the false positive rate can be reduced from 15% to 0.3%. The innovative optical layout and mechanical structure design enable the equipment to achieve industry-leading comprehensive performance indicators, especially in micro-defect detection (>0.02mm), three-dimensional morphology detection (full-angle coverage), and system stability (MTBF>10,000 hours), which perfectly solves the problems of missed detection, false detection, and efficiency bottlenecks mentioned in the background technology.

[0053] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0054] The above provides a detailed description of the dual-track solder sheet appearance inspection machine provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A dual-track solder sheet appearance inspection machine, characterized in that, include: At least two sets of visual inspection components (100); A vibrating feeder (300) is provided with a feeding rail (301), the end of which has at least two feeding ends; The material conveying end is located at the upper end of the transparent turntable (200); when the transparent turntable (200) rotates, the material conveying end has at least two material trajectories relative to the transparent turntable (200); Each group of the visual detection components (100) corresponds to passing through one of the material trajectories; Each set of vision inspection components (100) includes a first inspection station, a second inspection station and a third inspection station arranged in sequence; and the relative positions of the vision camera (101) and the solder sheet (210) to be inspected at each inspection station are different.

2. The dual-track solder sheet appearance inspection machine according to claim 1, characterized in that, The visual camera (101) and the light source (102) of the first detection station are opposite each other and are located at the upper and lower ends of the transparent turntable (200), respectively. The visual camera (101) and light source (102) of the second detection station are located on the upper end of the transparent turntable (200), and the visual camera (101) is on the upper end of the light source (102); The visual camera (101) and light source (102) of the third detection station are located at the lower end of the transparent turntable (200), and the visual camera (101) is at the lower end of the light source (102).

3. The dual-track solder sheet appearance inspection machine according to claim 2, characterized in that, The visual camera (101) is a 1.3-megapixel monochrome AS camera; The distance between the lens end of the vision camera (101) at the first detection station and the transparent turntable (200) is 110±30mm; The visual cameras (101) of the second and third detection stations are 230±30mm apart from the transparent turntable (200); The light source (102) of the second detection station and the third detection station is 100±30mm away from the transparent turntable (200).

4. The dual-track solder sheet appearance inspection machine according to claim 3, characterized in that, The light source (102) is a parallel light source.

5. The dual-track solder sheet appearance inspection machine according to claim 4, characterized in that, At least the light source (102) of the first detection station is a blue backlight.

6. The dual-track solder sheet appearance inspection machine according to claim 1, characterized in that, The vibrating feeder (300) also includes a storage hopper (303); The discharge port of the storage hopper (303) is located at the upper end of the vibrating plate (302); Both the vibrating plate (302) and the storage hopper (303) are mounted on the material rack.

7. The dual-track solder sheet appearance inspection machine according to claim 1, characterized in that, It also includes the cabinet (201); The transparent turntable (200) is located inside the cabinet (201); The cabinet (201) has a window on one side, and the feeding rail (301) extends from the window to the transparent turntable (200).

8. The dual-track solder sheet appearance inspection machine according to claim 7, characterized in that, A lighthouse (202) is provided at the upper end of the cabinet (201).

9. The dual-track solder sheet appearance inspection machine according to claim 7, characterized in that, The lower end of the cabinet (201) is equipped with casters (203).

10. The dual-track solder sheet appearance inspection machine according to claim 1, characterized in that, The transparent turntable (200) is located at the end of each set of vision inspection components (100) and is also provided with a receiving mechanism (400).

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