An appearance inspection machine

Abstract

The utility model relates to appearance inspection technical field discloses a kind of appearance inspection machines, including rack and be located on the rack feeding device, detection conveying line, pin detection device, bottom surface detection device, first side detection device, second side detection device and four inferior product unloading device;Detection conveying line is equipped with linear conveying passage, and the bottom end of the conveying passage is used to load and limit capacitor;Pin detection device, bottom surface detection device, first side detection device and second side detection device are sequentially arranged along the conveying direction of detection conveying line, and the inner wall of conveying passage is equipped with the position of first side detection device relative to the accommodation opening, and the front and rear side of capacitor on detection conveying line is exposed;Four inferior product unloading devices are located downstream of pin detection device, bottom surface detection device, first side detection device and second side detection device respectively.The utility model can solve how to improve the reliability and accuracy of capacitor appearance detection problem.

Description

Technical Field

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

[0002] In the field of electronic component manufacturing, capacitors are fundamental and critical electronic components, and their quality control is of paramount importance. Visual inspection is one of the key steps to ensure that capacitor quality meets standards. Currently, for cuboid two-lead capacitors, the common visual inspection methods are manual inspection and rotary visual inspection machines. Manual inspection is a more traditional method, where inspectors use their naked eyes or simple magnifying glasses to conduct a comprehensive and detailed inspection of the top and bottom surfaces, four sides, and the two leads of the capacitor. However, manual inspection is inefficient, labor-intensive, and difficult to meet the needs of large-scale production, and it can easily affect the accuracy of the inspection. To overcome the shortcomings of manual inspection, rotary visual inspection machines have emerged. The design principle of a rotary visual inspection machine is to use the rotation of a turntable to sequentially transport the capacitors to be tested to different inspection stations. Each inspection station is equipped with a dedicated inspection device that faces the corresponding surface of the capacitor to be tested, performing automated visual inspection of that surface. This inspection method improves inspection efficiency to a certain extent, reduces manual intervention, and lowers labor intensity.

[0003] However, rotary visual inspection machines have also revealed some problems in practical applications. To avoid the fixtures obstructing the capacitors and affecting the inspection device's comprehensive observation of their appearance, the capacitors are mostly placed directly on the turntable without additional limiting structures to constrain their position. This results in slight movements, such as deflection, of the capacitors during the turntable's rotation. While these minor positional changes may seem insignificant, they can prevent subsequent inspection devices from fully detecting the entire surface under test, leading to the omission of certain areas and affecting the subsequent inspection results, thus reducing the reliability and accuracy of the inspection.

[0004] In view of the above-mentioned problems of rotary visual inspection machines, it is necessary to develop a visual inspection machine to improve the reliability and accuracy of capacitor visual inspection. Utility Model Content

[0005] (a) Technical problems to be solved This invention provides an appearance inspection machine, which can at least solve the technical problem of how to improve the reliability and accuracy of capacitor appearance inspection.

[0006] (II) Technical Solution To solve the above-mentioned technical problems, this utility model provides the following technical solution: a visual inspection machine, comprising: frame; The feeding device and the testing conveyor line are both located on the frame. The testing conveyor line has a straight conveying channel, which is used to load and limit the bottom of the capacitors. The feeding device is used to feed the capacitors to be tested one by one into the conveying channel, and the testing conveyor line is used to transport the capacitors. The pin detection device, bottom surface detection device, first side surface detection device, and second side surface detection device are all mounted on the frame and arranged sequentially along the conveying direction of the detection conveyor line. The pin detection device is used to detect whether there are defects in the appearance of the pins and top surface of the capacitor. The bottom surface detection device is used to detect whether there are defects in the appearance of the bottom surface of the capacitor. The first side surface detection device is used to detect whether there are defects in the appearance of the front and rear sides of the capacitor. The second side surface detection device is used to detect whether there are defects in the appearance of the left and right sides of the capacitor. The inner wall of the conveying channel is provided with a clearance opening opposite to the position of the first side surface detection device. The clearance opening is used to expose the front and rear sides of the capacitor on the detection conveyor line. Four defective product unloading devices are all located on the frame. The four defective product unloading devices are located downstream of the pin detection device, bottom surface detection device, first side detection device and second side detection device, respectively. The four defective product unloading devices are used to transfer the unqualified capacitors out of the detection conveyor line according to the detection results of the pin detection device, bottom surface detection device, first side detection device and second side detection device.

[0007] Further configuration: The aforementioned testing conveyor line includes a first conveyor belt, a second conveyor belt, and a third conveyor belt connected in sequence. The first and third conveyor belts are both mounted on a frame. The conveying surfaces of the first and third conveyor belts are both horizontally positioned and perpendicular to the conveying surface of the second conveyor belt. The first and third conveyor belts are both used to carry and convey capacitors. The conveying surface of the second conveyor belt is used to contact the side of the capacitor. The second conveyor belt is used to convey the capacitor. The bottom surface inspection device includes a bottom surface inspection camera, a transparent plate, and a prism mounted on a frame. The transparent plate is located below the second conveyor belt, and its top surface is flush with the conveying surfaces of the first and third conveyor belts. The transparent plate is used to support the capacitor. The bottom surface inspection camera is located on one side of the inspection conveyor line, and the prism is located below the transparent plate. The two vertical surfaces of the prism are respectively set towards the transparent plate and the bottom surface inspection camera. The prism is used to reflect the bottom surface image of the capacitor to the bottom surface inspection camera, which is used to detect whether there are defects in the appearance of the bottom surface of the capacitor.

[0008] Further, the aforementioned second conveyor belt is provided in two parts. The conveying surfaces of the two second conveyor belts are respectively used to fit the front and rear sides of the capacitor on the transparent plate. A second limiting channel is formed between the two second conveyor belts. The second limiting channel is used to load and limit the bottom end of the capacitor.

[0009] Furthermore, the aforementioned detection conveyor line also includes an adjustment mechanism. The adjustment mechanism and one of the second conveyor belts are fixed on the frame, while the other second conveyor belt is slidably mounted on the frame and connected to the output end of the adjustment mechanism. The adjustment mechanism is used to drive the second conveyor belt to move toward or away from the other second conveyor belt in order to adjust the width of the second limiting channel.

[0010] Further, the aforementioned pin detection device includes two pin detection cameras, which are respectively located on both sides of the first conveyor belt. The positions of the two pin detection cameras are staggered. The lenses of the pin detection cameras are tilted along the first direction toward the pins and top surface of the capacitor on the first conveyor belt. The two pin detection cameras are used to detect whether there are defects in the appearance of the pins and top surface of the capacitor. The first direction is a horizontal direction and is perpendicular to the conveying direction of the detection conveyor line. The frame includes two first limiting plates, which are respectively located on both sides of the first conveyor belt. The two first limiting plates form a first limiting channel that connects with and is connected to the second limiting channel. The first limiting channel is used to load and limit the bottom end of the capacitor. The width of the first limiting channel is the same as the width of the capacitor.

[0011] Further, the aforementioned first side detection device includes a front side detection camera and a rear side detection camera, which are respectively located on both sides of the third conveyor belt. The positions of the front side detection camera and the rear side detection camera are staggered. The lens of the front side detection camera is set along the first direction toward the front side of the capacitor on the third conveyor belt. The front side detection camera is used to detect whether there are defects in the appearance of the front side of the capacitor. The lens of the rear side detection camera is set along the first direction toward the rear side of the capacitor on the third conveyor belt. The rear side detection camera is used to detect whether there are defects in the appearance of the rear side of the capacitor. The frame also includes two second limiting plates, which are located on both sides of the third conveyor belt. A third limiting channel is formed between the two second limiting plates. The width of the third limiting channel is the same as the width of the capacitor. The first limiting channel, the second limiting channel and the third limiting channel are connected in sequence to form a conveying channel. Both second limiting plates are provided with clearance openings, which are respectively set relative to the positions of the front side detection camera and the rear side detection camera.

[0012] In a further configuration, a first guide plate is provided on the inner wall of the aforementioned clearance opening away from the second conveyor belt. The first guide plate is inclined outward from the third conveyor belt and is used to guide the capacitor at the clearance opening toward the third limiting channel.

[0013] In a further configuration, the aforementioned second side inspection device includes a left side inspection camera and a right side inspection camera. An inspection station is provided on the third conveyor belt. Both the left side inspection camera and the right side inspection camera are located above the third conveyor belt and on opposite sides of the inspection station. The lens of the left side inspection camera is tilted along the conveying direction of the third conveyor belt and faces the left side of the capacitor at the inspection station. The left side inspection camera is used to inspect whether there are any defects on the left side of the capacitor at the inspection station. The lens of the right side inspection camera is tilted along the conveying direction of the third conveyor belt and faces the right side of the capacitor at the inspection station. The right side inspection camera is used to inspect whether there are any defects on the right side of the capacitor at the inspection station.

[0014] Further, the aforementioned feeding device includes: A feeding conveyor belt is mounted on the frame and its conveying direction is perpendicular to that of the testing conveyor line. The frame includes a first baffle and two second baffles. The first baffle is located at the discharge end of the feeding conveyor belt and extends along the conveying direction of the testing conveyor line. The second baffles are located on both sides of the feeding conveyor belt. The first baffle and the two second baffles are used to prevent capacitors from moving out of the feeding conveyor belt. The feeding conveyor belt carries and transports multiple capacitors to be tested toward the first baffle. A first opening and a second opening are formed between the first baffle and the two second baffles, respectively. The second opening is connected to the conveying channel. The push block and the push block driving mechanism are provided. The push block is located on the side of the first baffle facing the feeding conveyor belt. The push block driving mechanism is located on the frame and is connected to the push block for transmission. The push block driving mechanism is used to drive the push block to reciprocate between the first opening and the second opening so as to push the capacitors that abut against the first baffle into the conveying channel one by one.

[0015] Further, the aforementioned push block drive mechanism includes a translation drive assembly and a lifting drive assembly connected to each other. One of the lifting drive assembly and the translation drive assembly is mounted on the frame, and the output end of the other is connected to the push block. The lifting drive assembly is used to drive the push block to move up and down toward the feeding conveyor belt, and the translation drive assembly is used to drive the push block to move along the extension direction of the first baffle.

[0016] (III) Beneficial Effects Compared with the prior art, the appearance inspection machine provided by this utility model has the following beneficial effects: When using the appearance inspection machine provided by this utility model, firstly, the feeding device feeds the capacitors to be tested one by one into the conveying channel; then, the inspection conveyor line sequentially conveys the capacitors to the pin inspection device, bottom surface inspection device, first side inspection device, and second side inspection device for appearance inspection; if the inspection fails, the inspection conveyor line conveys the capacitors to the defective product unloading device of the corresponding inspection device, which transfers the unqualified capacitors out of the inspection conveyor line, ensuring that defective products are not mixed with qualified products, effectively guaranteeing product quality; if the inspection passes, the inspection conveyor line conveys the capacitors to the next inspection device for the next round of appearance inspection, until all inspection items are completed, and then the inspection conveyor line sends the capacitors to the next process. As can be seen, this utility model achieves automated and comprehensive inspection of capacitor appearance by integrating a feeding device, an inspection conveyor line, multiple inspection devices, and a defective product unloading device on the frame. Furthermore, during the inspection process, the inspection conveyor line precisely constrains the position of the capacitor through the conveying channel, effectively preventing adverse effects on subsequent inspection results due to positional movement of the capacitor during transport, thus significantly improving the reliability and accuracy of capacitor appearance inspection. In addition, the design of the clearance opening ensures that the first side inspection device can detect the entire front and rear sides of the capacitor, preventing the inner wall of the conveying channel from obstructing the front and rear sides of the capacitor. Attached Figure Description

[0017] Figure 1 This is a perspective view of the appearance inspection machine in the embodiment; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view of point B in the middle; Figure 4 for Figure 1 Enlarged view of point C in the middle; Figure 5 This is a schematic diagram of the structure of the second conveyor belt and the bottom surface detection device after being cut apart in the embodiment.

[0018] Icon labels: 1. Frame; 11. First limiting plate; 12. Second limiting plate; 121. Clearance opening; 13. First guide plate; 14. First baffle; 15. Second baffle; 16. First opening; 17. Second opening; 18. Discharge port; 181. Second guide plate; 19. Air outlet; 2. Feeding device; 21. Feeding conveyor belt; 22. Push block; 23. Push block drive mechanism; 231. Translation drive assembly; 232. Lifting drive assembly; 3. Inspection conveyor line; 31. Conveying channel; 311. Second limit channel; 312. First limit channel; 313. Third limit channel; 32. First conveyor belt; 33. Second conveyor belt; 34. Third conveyor belt; 341. Inspection station; 35. Adjustment mechanism; 4. Pin detection device; 41. Pin detection camera; 5. Bottom surface inspection device; 51. Bottom surface inspection camera; 52. Transparent plate; 53. Prism; 6. First side detection device; 61. Front side detection camera; 62. Rear side detection camera; 7. Second side detection device; 71. Left side detection camera; 72. Right side detection camera; 8. Defective product unloading device; 81. Air nozzle; 82. Defective product material box; 9. Capacitor; 91. Lead; 92. Top surface; 93. Bottom surface; 94. Front side; 95. Rear side; 96. Left side; 97. Right side; 10. Light source. Detailed Implementation

[0019] 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.

[0020] This invention provides an appearance inspection machine to solve the problem of how to improve the reliability and accuracy of appearance inspection of capacitor 9.

[0021] See Figure 1 and Figure 2 As shown, Figure 1 This is a perspective view of the appearance inspection machine in the embodiment. Figure 2 for Figure 1 The enlarged schematic diagram at point A shows that the appearance inspection machine includes a frame 1, a feeding device 2, an inspection conveyor line 3, a pin inspection device 4, a bottom surface inspection device 5, a first side inspection device 6, a second side inspection device 7, and four defective product unloading devices 8.

[0022] Both the feeding device 2 and the testing conveyor line 3 are mounted on the frame 1. The testing conveyor line 3 has a straight conveying channel 31, which is used to load and limit the bottom end of the capacitors 9. The feeding device 2 is used to feed the capacitors 9 to be tested one by one into the conveying channel 31. The testing conveyor line 3 is used to transport the capacitors 9.

[0023] The pin inspection device 4, bottom surface inspection device 5, first side surface inspection device 6, and second side surface inspection device 7 are all mounted on the frame 1 by screwing or welding, and are arranged sequentially along the conveying direction of the inspection conveyor line 3. The pin inspection device 4 is used to inspect the appearance of the pins 91 and top surface 92 of the capacitor 9 for defects. The bottom surface inspection device 5 is used to inspect the appearance of the bottom surface 93 of the capacitor 9 for defects. The first side surface inspection device 6 is used to inspect the appearance of the front side 94 and rear side 95 of the capacitor 9 for defects. The second side surface inspection device 7 is used to inspect the appearance of the left side 96 and right side 97 of the capacitor 9 for defects.

[0024] The inner wall of the conveying channel 31 has a clearance opening 121 that is opposite to the position of the first side detection device 6. The clearance opening 121 is used to expose the front side 94 and the rear side 95 of the capacitor 9 on the detection conveying line 3.

[0025] Four defective product unloading devices 8 are all installed on the frame 1, and are located downstream of the pin detection device 4, bottom surface detection device 5, first side surface detection device 6, and second side surface detection device 7, respectively. The four defective product unloading devices 8 are used to transfer the capacitors 9 that fail the inspection from the inspection conveyor line 3 according to the inspection results of the pin detection device 4, bottom surface detection device 5, first side surface detection device 6, and second side surface detection device 7.

[0026] When using the above-described appearance inspection machine, firstly, the feeding device 2 feeds the capacitors 9 to be tested one by one into the conveying channel 31. Then, the inspection conveyor line 3 sequentially conveys the capacitors 9 to the pin inspection device 4, bottom surface inspection device 5, first side inspection device 6, and second side inspection device 7 for appearance inspection (e.g., checking whether there are stains or defects such as dents on the surface of the capacitors 9). If the inspection fails, the inspection conveyor line 3 conveys the capacitors 9 to the defective product unloading device 8 of the corresponding inspection device. The defective product unloading device 8 removes the unqualified capacitors 9 from the inspection conveyor line 3, ensuring that defective products are not mixed with qualified products, effectively guaranteeing product quality. If the inspection passes, the inspection conveyor line 3 conveys the capacitors 9 to the next inspection device for the next round of appearance inspection, until all inspection items are completed. Finally, the inspection conveyor line 3 sends the capacitors 9 to the next process. As can be seen, this utility model achieves automated and comprehensive inspection of the appearance of capacitor 9 by integrating a feeding device 2, an inspection conveyor line 3, multiple sets of inspection devices, and a defective product unloading device 8 on the frame 1. Furthermore, during the inspection process, the inspection conveyor line 3 precisely constrains the position of capacitor 9 through the conveying channel 31, effectively preventing adverse effects on subsequent inspection results due to positional movement of capacitor 9 during transport, thereby significantly improving the reliability and accuracy of the appearance inspection of capacitor 9. In addition, the design of the clearance opening 121 ensures that the first side inspection device 6 can detect the entire front side 94 and the entire rear side 95 of capacitor 9, preventing the inner wall of the conveying channel 31 from obstructing the front side 94 and rear side 95 of capacitor 9.

[0027] See Figure 1 and Figure 5 As shown, Figure 5This is a schematic diagram of the cross-section of the second conveyor belt and the bottom surface detection device in one embodiment. In one implementation of the detection conveyor line 3 and the bottom surface detection device 5, the detection conveyor line 3 includes a first conveyor belt 32, a second conveyor belt 33, and a third conveyor belt 34 connected sequentially. The first conveyor belt 32 and the third conveyor belt 34 are both mounted on the frame 1 by screwing or welding. The conveying surfaces of the first conveyor belt 32 and the third conveyor belt 34 are both horizontally arranged and perpendicular to the conveying surface of the second conveyor belt 33. Both the first conveyor belt 32 and the third conveyor belt 34 are used to carry and convey the capacitor 9. The conveying surface of the second conveyor belt 33 is used to contact the side of the capacitor 9, and the second conveyor belt 33 is used to convey the capacitor 9. The bottom surface detection device 5 includes a bottom surface detection camera 51, a transparent plate 52, and a prism 53, all of which are mounted on the frame 1 by screwing or welding. A transparent plate 52 is located below the second conveyor belt 33, and its top surface 92 is flush with the conveying surfaces of the first and third conveyor belts 32 and 34. The transparent plate 52 is used to support the capacitor 9. A bottom surface inspection camera 51 is located on one side of the inspection conveyor line 3. A prism 53 is located below the transparent plate 52, with its two vertical surfaces facing the transparent plate 52 and the bottom surface inspection camera 51, respectively. The prism 53 is used to reflect the image of the bottom surface 93 of the capacitor 9 to the bottom surface inspection camera 51. The bottom surface inspection camera 51 is used to detect whether there are defects in the appearance of the bottom surface 93 of the capacitor 9. Thus, the inspection conveyor line 3, via the second conveyor belt 33, can automatically transport the capacitor 9 on the transparent plate 52 to the top of the prism 53 for bottom surface appearance inspection. After inspection, the second conveyor belt 33 can automatically transport the capacitor 9 on the transparent plate 52 to the third conveyor belt 34 for subsequent side appearance inspection. During bottom surface inspection, the bottom surface inspection device 5, through the cooperation of the bottom surface inspection camera 51, the transparent plate 52, and the prism 53, can clearly and accurately acquire image information of the bottom surface 93 of the capacitor 9, achieving effective detection of appearance defects on the bottom surface 93 of the capacitor 9. In addition, the bottom surface inspection camera 51 is installed on the side of the inspection conveyor line 3, making it very convenient to disassemble and replace, effectively reducing the maintenance cost and time of the bottom surface inspection camera 51.

[0028] The first conveyor belt 32, the second conveyor belt 33, and the third conveyor belt 34 can all use existing servo motor-belt conveyor mechanisms. The bottom surface inspection camera 51 can use existing visual inspection mechanisms such as CCD cameras, which can quickly and accurately collect appearance defects of capacitor 9. The transparent plate 52 can use existing high-transparency glass plates. The prism 53 can use existing prisms. In this embodiment, the cross-section of the prism 53 is a right-angled isosceles triangle, and its inclined surface can reflect the image of the bottom surface 93 of capacitor 9 to the bottom surface inspection camera 51 on one side.

[0029] See Figure 1 and Figure 5 As shown, based on the above embodiment, there are two second conveyor belts 33. The conveying surfaces of the two second conveyor belts 33 are respectively used to contact the front side 94 and the rear side 95 of the capacitor 9 on the transparent plate 52. A second limiting channel 311 is formed between the two second conveyor belts 33. The second limiting channel 311 is used to load and limit the bottom end of the capacitor 9. In this way, by setting two second conveyor belts 33 to transport the capacitor 9 synchronously, the stability of the capacitor 9 during the transport process can be improved. In addition, the second limiting channel 311 formed between the two second conveyor belts 33 can limit the position of the capacitor 9, which is beneficial for the accurate detection of each side of the capacitor 9 in the future.

[0030] See Figure 1 and Figure 5 As shown, based on the above embodiment, the detection conveyor line 3 further includes an adjustment mechanism 35. The adjustment mechanism 35 and one of the second conveyor belts 33 are fixed to the frame 1 by screwing or welding, etc. The other second conveyor belt 33 is slidably connected to the frame 1 and connected to the output end of the adjustment mechanism 35 by screwing or welding, etc. The adjustment mechanism 35 is used to drive the second conveyor belt 33 to move towards or away from the other second conveyor belt 33 to adjust the width of the second limiting channel 311. Thus, the adjustment mechanism 35 makes the width of the second limiting channel 311 adjustable, adapting to the detection requirements of capacitors 9 of different sizes and specifications, improving the versatility and flexibility of the equipment.

[0031] The aforementioned adjustment mechanism 35 can use an existing screw-nut mechanism or gear-rack mechanism to flexibly adjust the width of the second limiting channel 311. To facilitate fixing the adjusted width of the second limiting channel 311, fasteners such as screws can also be installed on the sliding second conveyor belt 33 to fix its position.

[0032] See Figure 1 and Figure 3 As shown, Figure 3 for Figure 1The enlarged schematic diagram at point B shows that, in one embodiment of the pin detection device 4, the pin detection device 4 includes two pin detection cameras 41. The two pin detection cameras 41 are located on opposite sides of the first conveyor belt 32. The positions of the two pin detection cameras 41 are staggered. The lenses of the pin detection cameras 41 are tilted along a first direction towards the pins 91 and top surface 92 of the capacitor 9 on the first conveyor belt 32. The two pin detection cameras 41 are used to detect whether there are defects in the appearance of the pins 91 and top surface 92 of the capacitor 9. The first direction is a horizontal direction and is perpendicular to the conveying direction of the detection conveyor line 3. The frame 1 includes two first limiting plates 11. The two first limiting plates 11 are located on opposite sides of the first conveyor belt 32. A first limiting channel 312 is formed between the two first limiting plates 11 and connects with the second limiting channel 311. The first limiting channel 312 is used to load and limit the bottom end of the capacitor 9, and the width of the first limiting channel 312 is the same as the width of the capacitor 9. Thus, the two staggered, downward-tilted pin detection cameras 41 can comprehensively detect appearance defects of the pins 91 and top surface 92 of the capacitor 9, improving the accuracy of the detection; while the two first limiting plates 11 can limit the left and right positions of the capacitor 9, further ensuring the positional accuracy of the capacitor 9 on the first conveyor belt 32, which is beneficial to the accurate detection of the pin detection device 4.

[0033] The aforementioned pin inspection camera 41 can use existing visual inspection mechanisms such as CCD cameras to quickly and accurately collect appearance defects of capacitor 9.

[0034] See Figure 1 and Figure 2As shown, in one embodiment of the first side detection device 6, the first side detection device 6 includes a front side detection camera 61 and a rear side detection camera 62. The front side detection camera 61 and the rear side detection camera 62 are respectively located on both sides of the third conveyor belt 34, and their positions are staggered. The lens of the front side detection camera 61 is positioned along a first direction towards the front side 94 of the capacitor 9 on the third conveyor belt 34. The front side detection camera 61 is used to detect whether there are defects in the appearance of the front side 94 of the capacitor 9. The lens of the rear side detection camera 62 is positioned along the first direction towards the rear side 95 of the capacitor 9 on the third conveyor belt 34. The rear side detection camera 62 is used to detect whether there are defects in the appearance of the rear side 95 of the capacitor 9. The frame 1 also includes two second limiting plates 12. The two second limiting plates 12 are respectively located on both sides of the third conveyor belt 34. A third limiting channel 313 is formed between the two second limiting plates 12, and the width of the third limiting channel 313 is the same as the width of the capacitor 9. The first limiting channel 312, the second limiting channel 311, and the third limiting channel 313 are sequentially connected to form a conveying channel 31. Each of the two second limiting plates 12 has a clearance opening 121, which is positioned opposite to the front side detection camera 61 and the rear side detection camera 62, respectively. Thus, the two staggered front side detection cameras 61 and 62 can comprehensively detect appearance defects on the front side 94 and rear side 95 of the capacitor 9. The design of the third limiting channel 313 formed by the two second limiting plates 12 and the clearance opening 121 ensures the stability of the capacitor 9 during transport and provides a clear field of view for the detection cameras, allowing the front side detection camera 61 and the rear side detection camera 62 to detect the entire front side 94 and the entire rear side 95 of the capacitor 9, respectively, thus improving detection accuracy.

[0035] The width of the aforementioned clearance opening 121 is greater than the length of the capacitor 9, so that the entire front side 94 or rear side 95 of the capacitor 9 can be fully exposed. Both the aforementioned front side inspection camera 61 and rear side inspection camera 62 can use existing visual inspection mechanisms such as CCD cameras, which can quickly and accurately collect appearance defects of the capacitor 9.

[0036] See Figure 2As shown, based on the above embodiment, a first guide plate 13 is provided on the inner wall of the clearance opening 121 away from the second conveyor belt 33 by welding or integral connection. The first guide plate 13 is inclined outward from the third conveyor belt 34 and is used to guide the capacitor 9 at the clearance opening 121 toward the third limiting channel 313. In this way, since the capacitor 9 may move toward the clearance opening 121 with the conveying of the third conveyor belt 34 when the limiting effect of the second limiting plate 12 is absent, the setting of the first guide plate 13 can guide the capacitor 9 to move toward the third limiting channel 313 with the conveying of the third conveyor belt 34, effectively avoiding the capacitor 9 from getting stuck or deviating at the clearance opening 121, or even falling out of the third conveyor belt 34, ensuring the smooth conveying and positional accuracy of the capacitor 9, which is beneficial to subsequent testing work.

[0037] See Figure 1 As shown, in one embodiment of the second side inspection device 7, the second side inspection device 7 includes a left side inspection camera 71 and a right side inspection camera 72. An inspection station 341 is provided on the third conveyor belt 34. Both the left side inspection camera 71 and the right side inspection camera 72 are located above the third conveyor belt 34 and are respectively located on both sides of the inspection station 341. The lens of the left side inspection camera 71 is tilted along the conveying direction of the third conveyor belt 34 and positioned towards the left side 96 of the capacitor 9 on the inspection station 341. The left side inspection camera 71 is used to inspect whether there are defects in the appearance of the left side 96 of the capacitor 9 on the inspection station 341. The lens of the right side inspection camera 72 is tilted along the conveying direction of the third conveyor belt 34 and positioned towards the right side 97 of the capacitor 9 on the inspection station 341. The right side inspection camera 72 is used to inspect whether there are defects in the appearance of the right side 97 of the capacitor 9 on the inspection station 341. In this way, the left side inspection camera 71 and the right side inspection camera 72 can simultaneously perform appearance inspection on the left side 96 and right side 97 of the capacitor 9 on the inspection station 341, effectively improving the inspection efficiency.

[0038] Both the left-side inspection camera 71 and the right-side inspection camera 72 mentioned above can use existing visual inspection mechanisms such as CCD cameras, which can quickly and accurately collect appearance defects of capacitor 9. In addition, light sources 10 can be set between the transparent plate 52 and the prism 53, between the pin inspection camera 41 and the first conveyor belt 32, between the front side inspection camera 61 and the third conveyor belt 34, between the rear side inspection camera 62 and the third conveyor belt 34, and above the inspection station 341, which can illuminate the corresponding areas of capacitor 9 to be inspected, further improving the inspection accuracy.

[0039] See Figure 1 and Figure 3As shown, in one embodiment of the feeding device 2, the feeding device 2 includes a feeding conveyor belt 21, a pusher block 22, and a pusher block drive mechanism 23. The feeding conveyor belt 21 is mounted on the frame 1 by means of screwing or welding. The conveying direction of the feeding conveyor belt 21 is perpendicular to the conveying direction of the detection conveyor line 3. The frame 1 includes a first baffle 14 and two second baffles 15. The first baffle 14 is located at the discharge end of the feeding conveyor belt 21 and extends along the conveying direction of the detection conveyor line 3. The second baffles 15 are located on both sides of the feeding conveyor belt 21. The first baffle 14 and the two second baffles 15 are used to prevent the capacitors 9 from moving out of the feeding conveyor belt 21. The feeding conveyor belt 21 is used to carry and transport multiple capacitors 9 to be tested toward the first baffle 14. A first opening 16 and a second opening 17 are formed between the first baffle 14 and the two second baffles 15, respectively. The second opening 17 communicates with the conveying channel 31. The pusher block 22 is located on the side of the first baffle 14 facing the feeding conveyor belt 21. The pusher block drive mechanism 23 is mounted on the frame 1 by means of screwing or welding, and its output end is connected to the pusher block 22 by means of screwing or welding. The pusher block drive mechanism 23 is used to drive the pusher block 22 to reciprocate between the first opening 16 and the second opening 17, so as to push the capacitors 9 that abut against the first baffle 14 one by one into the conveying channel 31. In this way, the feeding conveyor belt 21, together with the first baffle 14 and the second baffle 15, can automatically and orderly arrange and transport multiple capacitors 9 to be tested. The arrangement of the pusher block 22 and the pusher block drive mechanism 23 realizes the feeding of capacitors 9 one by one, ensuring the accuracy and stability of feeding, and providing a good foundation for subsequent testing work.

[0040] The aforementioned feeding conveyor belt 21 can use an existing servo motor-belt conveyor mechanism.

[0041] See Figure 1 and Figure 3As shown, in one embodiment of the pusher drive mechanism 23, the pusher drive mechanism 23 includes a translation drive assembly 231 and a lifting drive assembly 232 connected to each other. One of the translation drive assembly 231 and the lifting drive assembly 232 is mounted on the frame 1 by means of screwing or welding, and the output end of the other is connected to the pusher block 22 by means of screwing or welding. The lifting drive assembly 232 is used to drive the pusher block 22 to move up and down toward the feeding conveyor belt 21. The translation drive assembly 231 is used to drive the pusher block 22 to move along the extension direction of the first baffle 14. Thus, when the feeding device 2 is in use, the pusher block 22 starts within the first opening 16. First, the translation drive assembly 231 drives the pusher block 22 to move towards the second opening 17 along the extension direction of the first baffle 14. During the movement of the pusher block 22, it pushes the capacitor 9, which is in contact with the first baffle 14, towards the second opening 17. After pushing the capacitor 9 closest to the second opening 17 into the conveying channel 31, the translation drive assembly 231 stops driving the pusher block 22. At the same time, the detection conveyor line 3 moves the capacitor 9 to the first pin detection camera 41 for visual inspection. Then, the translation drive assembly 231 continues to drive the pusher block 22. The pusher block 22 pushes the capacitor 9 closest to the second opening 17 into the conveyor channel 31. Then, the translation drive component 231 stops driving the pusher block 22. This process is repeated to feed the capacitors 9 to be tested one by one onto the testing conveyor line 3. When the translation drive component 231 drives the pusher block 22 to the second opening 17, the lifting drive component 232 drives the pusher block 22 to rise away from the second opening 17. Then, the translation drive component 231 drives the pusher block 22 to move away from the second opening 17 and above the first opening 16. The lifting drive component 232 then drives the pusher block 22 to descend into the first opening 16 and return to its original position. It can be seen that the pusher drive mechanism 23, through the translation drive component 231, can drive the pusher block 22 to push the capacitors. After each row of capacitors 9 to be tested is fed, the lifting drive component 232 can drive the pusher block 22 back to its original position, effectively preventing the capacitors 9 from being pushed out of the feeding conveyor belt 21 from the first opening 16 during the return process.

[0042] The aforementioned lifting drive assembly 232 can use existing linear displacement drive mechanisms such as telescopic cylinders or telescopic poles. The aforementioned translation drive assembly 231 can use existing linear displacement drive mechanisms such as servo motor-screw-nut linear modules or servo motor-rack and pinion linear modules. In this embodiment, the translation drive assembly 231 is mounted on the frame 1, and the lifting drive assembly 232 is mounted on the output end of the translation drive assembly 231. The output end of the lifting drive assembly 232 is screwed to the push block 22.

[0043] See Figure 1 and Figure 4 As shown, Figure 4 for Figure 1The enlarged schematic diagram at point C shows that in one embodiment of the defective product unloading device 8, the defective product unloading device 8 includes an air nozzle 81 and a defective product box 82. The air nozzle 81 is fixed to the frame 1. The defective product box 82 is disposed on the frame 1 by means of placement or screw connection, and is used to hold capacitors 9 that fail the inspection. The defective product boxes 82 of the four defective product unloading devices 8 are respectively located downstream of the pin detection device 4, the bottom surface detection device 5, the first side detection device 6, and the second side detection device 7. The first limiting plate 11 and the second limiting plate 12 each have a discharge port 18 and an air outlet 19. The number of discharge ports 18 and air outlets 19 is the same as the number of defective product boxes 82, and they are positioned opposite each other. The air outlet 19 of the air nozzle 81 is positioned opposite to the air outlet 19. The air nozzle 81 is used to blow the capacitors 9 that fail the inspection on the inspection conveyor line 3 through the air outlet 19 to move them from the discharge port 18 to the corresponding defective product box 82. A second guide plate 181 is integrally connected or welded to the inner wall of the discharge port 18 on the side away from the feeding device 2. The second guide plate 181 is inclined outward from the detection conveyor line 3 and is used to guide the capacitor 9 at the discharge port 18 toward the conveying channel 31. In this way, when the detection result of the detection device upstream of the defective product unloading device 8 shows that it is unqualified, the defective product unloading device 8 can blow the unqualified capacitor 9 into the defective product box 82 through the air nozzle 81, so as to promptly remove the defective capacitor 9 and facilitate centralized processing of the defective capacitor 9.

[0044] The aforementioned air nozzle 81 can be connected to existing air blowing equipment to provide an air source for the air nozzle 81.

[0045] This utility model may also include a control system, which is electrically connected to each device and can control the devices to work together. When any one of the pin detection device 4, bottom surface detection device 5, first side surface detection device 6 and second side surface detection device 7 shows a non-compliance, the control system controls the corresponding air nozzle 81 to blow it into the corresponding defective product box 82.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A visual inspection machine, characterized in that, include: frame; The feeding device and the testing conveyor line are both located on the frame. The testing conveyor line has a straight conveying channel. The conveying channel is used to load and limit the bottom end of the capacitor. The feeding device is used to feed the capacitors to be tested one by one into the conveying channel. The testing conveyor line is used to transport the capacitors. Pin detection device, bottom surface detection device, first side surface detection device and second side surface detection device are all mounted on the frame and arranged sequentially along the conveying direction of the detection conveyor line. The pin detection device is used to detect whether there are defects in the appearance of the pins and top surface of the capacitor. The bottom surface detection device is used to detect whether there are defects in the appearance of the bottom surface of the capacitor. The first side surface detection device is used to detect whether there are defects in the appearance of the front and rear sides of the capacitor. The second side surface detection device is used to detect whether there are defects in the appearance of the left and right sides of the capacitor. The inner wall of the conveying channel is provided with a clearance opening opposite to the position of the first side surface detection device. The clearance opening is used to expose the front and rear sides of the capacitor on the detection conveyor line. Four defective product unloading devices are all installed on the frame. The four defective product unloading devices are located downstream of the pin detection device, bottom surface detection device, first side surface detection device and second side surface detection device, respectively. The four defective product unloading devices are used to transfer the unqualified capacitors out of the detection conveyor line according to the detection results of the pin detection device, bottom surface detection device, first side surface detection device and second side surface detection device.

2. The appearance inspection machine according to claim 1, characterized in that, The testing conveyor line includes a first conveyor belt, a second conveyor belt, and a third conveyor belt connected in sequence. The first conveyor belt and the third conveyor belt are both mounted on the frame. The conveying surfaces of the first conveyor belt and the third conveyor belt are both horizontally arranged and perpendicular to the conveying surface of the second conveyor belt. The first conveyor belt and the third conveyor belt are both used to carry and convey the capacitor. The conveying surface of the second conveyor belt is used to fit against the side of the capacitor. The second conveyor belt is used to convey the capacitor. The bottom surface inspection device includes a bottom surface inspection camera, a transparent plate, and a prism mounted on the frame. The transparent plate is located below the second conveyor belt, and its top surface is flush with the conveying surfaces of the first and third conveyor belts. The transparent plate is used to support the capacitor. The bottom surface inspection camera is located on one side of the inspection conveyor line. The prism is located below the transparent plate, and its two vertical surfaces face the transparent plate and the bottom surface inspection camera, respectively. The prism is used to reflect the bottom surface image of the capacitor to the bottom surface inspection camera, which is used to detect whether there are defects in the bottom surface appearance of the capacitor.

3. The appearance inspection machine according to claim 2, characterized in that, The second conveyor belt is provided in two parts. The conveying surfaces of the two second conveyor belts are respectively used to fit the front and rear sides of the capacitor on the transparent plate. A second limiting channel is formed between the two second conveyor belts. The second limiting channel is used to load and limit the bottom end of the capacitor.

4. The appearance inspection machine according to claim 3, characterized in that, The detection conveyor line also includes an adjustment mechanism. The adjustment mechanism and one of the second conveyor belts are fixed on the frame. The other second conveyor belt is slidably disposed on the frame and connected to the output end of the adjustment mechanism. The adjustment mechanism is used to drive the second conveyor belt to move toward or away from the other second conveyor belt in order to adjust the width of the second limiting channel.

5. The visual inspection machine according to claim 3 or 4, characterized in that, The pin detection device includes two pin detection cameras, which are respectively located on both sides of the first conveyor belt. The positions of the two pin detection cameras are staggered. The lens of the pin detection camera is tilted along a first direction toward the pins and top surface of the capacitor on the first conveyor belt. The two pin detection cameras are used to detect whether there are defects in the appearance of the pins and top surface of the capacitor. The first direction is a horizontal direction and is perpendicular to the conveying direction of the detection conveyor line. The frame includes two first limiting plates, which are respectively disposed on both sides of the first conveyor belt. A first limiting channel is formed between the two first limiting plates and is connected to the second limiting channel. The first limiting channel is used to load and limit the bottom end of the capacitor. The width of the first limiting channel is the same as the width of the capacitor.

6. The visual inspection machine according to claim 5, characterized in that, The first side inspection device includes a front side inspection camera and a rear side inspection camera, which are respectively located on both sides of the third conveyor belt. The positions of the front side inspection camera and the rear side inspection camera are staggered. The lens of the front side inspection camera is set along the first direction toward the front side of the capacitor on the third conveyor belt. The front side inspection camera is used to detect whether there are defects in the appearance of the front side of the capacitor. The lens of the rear side inspection camera is set along the first direction toward the rear side of the capacitor on the third conveyor belt. The rear side inspection camera is used to detect whether there are defects in the appearance of the rear side of the capacitor. The frame also includes two second limiting plates, which are respectively located on both sides of the third conveyor belt. A third limiting channel is formed between the two second limiting plates. The width of the third limiting channel is the same as the width of the capacitor. The first limiting channel, the second limiting channel, and the third limiting channel are sequentially connected to form the conveying channel. Each of the two second limiting plates is provided with a clearance opening, which is respectively positioned opposite to the front side detection camera and the rear side detection camera.

7. The appearance inspection machine according to claim 6, characterized in that, A first guide plate is provided on the inner wall of the side of the clearance opening away from the second conveyor belt. The first guide plate is inclined outward from the third conveyor belt and is used to guide the capacitor at the clearance opening toward the third limiting channel.

8. The visual inspection machine according to any one of claims 2, 3, 4, 6 and 7, characterized in that, The second side inspection device includes a left side inspection camera and a right side inspection camera. An inspection station is provided on the third conveyor belt. Both the left side inspection camera and the right side inspection camera are located above the third conveyor belt and on opposite sides of the inspection station. The lens of the left side inspection camera is tilted along the conveying direction of the third conveyor belt towards the left side of the capacitor at the inspection station. The left side inspection camera is used to inspect whether there are defects on the left side of the capacitor at the inspection station. The lens of the right side inspection camera is tilted along the conveying direction of the third conveyor belt towards the right side of the capacitor at the inspection station. The right side inspection camera is used to inspect whether there are defects on the right side of the capacitor at the inspection station.

9. The appearance inspection machine according to any one of claims 1, 2, 3, 4, 6 and 7, characterized in that, The feeding device includes: A feeding conveyor belt is mounted on the frame, and its conveying direction is perpendicular to the conveying direction of the testing conveyor line. The frame includes a first baffle and two second baffles. The first baffle is located at the discharge end of the feeding conveyor belt and extends along the conveying direction of the testing conveyor line. The second baffles are located on both sides of the feeding conveyor belt. The first baffle and the two second baffles are used to prevent capacitors from moving out of the feeding conveyor belt. The feeding conveyor belt carries and conveys multiple capacitors to be tested toward the first baffle. A first opening and a second opening are formed between the first baffle and the two second baffles, respectively. The second opening communicates with the conveying channel. The push block and the push block driving mechanism are provided. The push block is located on the side of the first baffle facing the feeding conveyor belt. The push block driving mechanism is located on the frame and is connected to the push block in a transmission manner. The push block driving mechanism is used to drive the push block to reciprocate between the first opening and the second opening, so as to push the capacitors that abut against the first baffle into the conveying channel one by one.

10. The appearance inspection machine according to claim 9, characterized in that, The push block drive mechanism includes a translation drive component and a lifting drive component connected to each other. One of the lifting drive component and the translation drive component is mounted on the frame, and the output end of the other is connected to the push block. The lifting drive component is used to drive the push block to move up and down toward the feeding conveyor belt, and the translation drive component is used to drive the push block to move along the extension direction of the first baffle.

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