Visual detection device for aluminum electrolytic capacitor and detection method thereof

Abstract

The application relates to the technical field of capacitor production equipment, and provides an aluminum electrolytic capacitor visual detection device and a detection method thereof, which comprises a workbench, a feeding mechanism, a visual detection mechanism and a driving mechanism, the surface of the workbench is provided with a qualified product discharging channel and an unqualified product discharging channel, the visual detection mechanism comprises a visual detection assembly and a rotating assembly, the visual detection assembly comprises a translation plate, a rack, a containing frame and a CCD camera module, the driving mechanism is used for controlling the reciprocating movement of the translation plate and the containing frame, the aluminum electrolytic capacitor can be automatically fed, the capacitor can be automatically driven to roll by 360 degrees or 720 degrees, the CCD camera module can acquire complete image data of the surface of the capacitor, the driving mechanism is used for controlling the visual detection mechanism to rotate by 90 degrees around the center axis of the material guide channel, the position of the unqualified capacitor is adjusted, the device has the characteristics of ingenious structure cooperation, complete and integrated appearance detection data and automatic feeding and discharging.

Description

Technical Field

[0001] This invention relates to the field of capacitor production equipment technology, specifically to a visual inspection device and method for aluminum electrolytic capacitors. Background Technology

[0002] There is a great demand for aluminum electrolytic capacitors in terms of large capacitance. Currently, they are generally expanded by stacking multiple capacitor units to form high-capacitance solid electrolytic capacitors. Known stacked solid electrolytic capacitors include multiple capacitor units and lead frames. Each capacitor unit includes an anode part, a cathode part and an insulating part. The insulating part makes the anode part and the cathode part electrically insulated from each other, thereby forming a high-capacitance electrolytic capacitor.

[0003] Strict quality control is crucial during capacitor manufacturing. The appearance of a finished capacitor often directly reflects its quality; therefore, current technology typically requires visual inspection to determine its quality. This includes checking for defects such as exposed solder joints or bulging bottoms.

[0004] Patent CN220635387U discloses a visual inspection device for capacitor appearance, including an inspection workbench, a sorting workbench, and a conveying device. The inspection workbench includes a feeding and conveying station, a visual inspection station, a first transfer mechanism, and a second transfer mechanism; the conveying device includes a good product conveying mechanism and a defective product conveying mechanism; the sorting workbench includes a good product receiving tray, a defective product receiving tray, a first pushing mechanism, and a second pushing mechanism. It has the advantages of precise workpiece positioning and high inspection accuracy, while effectively reducing the risk of workpiece deformation and lowering production costs.

[0005] The capacitor appearance visual inspection equipment described above also has the following technical defects: it requires the cooperation of multiple inspection cameras, transfer mechanisms and pushing mechanisms to complete the complete appearance defect inspection of capacitors; it cannot automatically feed materials; it cannot complete the complete appearance defect inspection of capacitors using a single set of cameras; and it has the characteristics of complex structure, high inspection cost and large footprint. Summary of the Invention

[0006] The purpose of this invention is to provide a visual inspection device and method for aluminum electrolytic capacitors, aiming to solve the problems existing when using existing visual inspection devices for aluminum electrolytic capacitors.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a visual inspection device for aluminum electrolytic capacitors, comprising:

[0008] A workbench, the surface of which is provided with a qualified product unloading channel and a non-qualified product unloading channel;

[0009] The feeding mechanism includes a guide channel and a toothed ring. The guide channel is disposed on the surface of the worktable, and the toothed ring is fixedly connected to the guide channel. A capacitor is placed inside the guide channel.

[0010] A visual inspection mechanism includes a visual inspection component and a rotating component. The visual inspection component includes a translation plate, a rack, a receiving frame, and a CCD camera module. The rack is fixedly connected to one side of the translation plate, the receiving frame is fixedly connected to one end of the translation plate, and the CCD camera module is disposed on one side of the receiving frame. The translation plate is in sliding contact with the bottom of the material guide channel. The translation plate is slidably connected to the rotating component, and the rotating component is movably connected to the gear ring. The distance between the receiving frame and the surface of the worktable is greater than the distance between the center of the capacitor and the surface of the worktable.

[0011] A drive mechanism fixedly connected to the rotating assembly, wherein the gear ring and the rack are both connected to the drive mechanism for transmission.

[0012] As a further embodiment of the present invention, the rotating assembly includes a rotating housing, a second support and a limiting frame, the second support and the limiting frame are both fixedly connected to the rotating housing, the translation plate is slidably connected to the rotating housing, and the limiting frame is movably sleeved on the surface of the toothed ring.

[0013] As a further embodiment of the present invention, the driving mechanism includes a driving module, which includes a driving motor, a driving shaft, a limiting rib, an end cover, a driving gear, and a magnetic ring. The driving motor is fixedly connected to the second bracket, the driving shaft is fixedly connected to the driving motor, the driving gear is movably sleeved on the surface of the driving shaft, the driving shaft and the driving gear are respectively provided with a limiting rib and a limiting groove, the limiting rib and the limiting groove are slidably connected, the surface of the driving gear is inlaid with a magnetic ring, the gear ring and the rack are both connected to the driving gear for transmission, and an end cover is fixedly connected to the end of the driving shaft.

[0014] As a further embodiment of the present invention, the driving mechanism further includes an adjustment module, which includes an electromagnet and a return spring. The electromagnet is fixedly connected to the second bracket, and the return spring is connected between the second bracket and the driving gear. When the electromagnet and the magnetic ring are magnetically engaged, the gear ring is driven by the driving gear. When the spring force of the return spring drives the driving gear to engage with the end cover, the rack is driven by the driving gear.

[0015] As a further embodiment of the present invention, the feeding mechanism further includes an opening, a base, and a control panel. An opening is provided on one side of the material guide channel, the base is fixedly connected between the material guide channel and the worktable, and the control panel is fixedly connected to the base.

[0016] As a further embodiment of the present invention, the visual inspection component further includes a viewing port and a first bracket, the viewing port is provided on the surface of the receiving frame, the first bracket is fixedly connected to the receiving frame, and the CCD camera module is fixedly connected to the surface of the first bracket.

[0017] As a further embodiment of the present invention, the rotating assembly further includes a support leg, one end of which is fixedly connected to the rotating housing, and the other end of which is in sliding contact with the surface of the worktable.

[0018] As a further embodiment of the present invention, the surface of the workbench is provided with a rough fabric, which is distributed between the guide channel and the qualified product unloading channel.

[0019] A method for operating a visual inspection device for aluminum electrolytic capacitors includes:

[0020] S100. Under the premise that the capacitor has entered the receiving frame, the translation plate and the receiving frame are controlled to move in the direction of the qualified product unloading channel by means of the drive mechanism and the rack and pinion transmission. The translation plate is used to block the guide channel. Since the distance between the receiving frame and the worktable surface is greater than the distance between the center of the capacitor and the worktable surface, the moving receiving frame achieves the purpose of driving the capacitor to roll by applying a pushing force to the upper part of the capacitor. The CCD camera module collects image data when the capacitor rolls 360 degrees or 720 degrees to improve the completeness of the appearance image data.

[0021] S200: Analyze the image of the capacitor rolling process and output the analysis result information. When the analysis result information is qualified, the drive mechanism continues to control the receiving frame to move to the top of the qualified product unloading channel for automatic unloading.

[0022] S300. When the analysis result is unqualified, the vision inspection mechanism and capacitor are rotated 90 degrees by using a drive mechanism connected to a gear ring transmission. The drive mechanism is then used to control the receiving frame to move above the unqualified product unloading channel for automatic unloading.

[0023] The beneficial effects of this invention are as follows: This application utilizes a structural design in which the workbench, feeding mechanism, vision inspection mechanism, and drive mechanism cooperate with each other. By controlling the reciprocating movement of the translation plate and the receiving frame through the drive mechanism, it can not only automatically feed materials, but also automatically drive the capacitor to roll 360 degrees or 720 degrees to obtain complete image data of its surface through the CCD camera module. By controlling the vision inspection mechanism to rotate 90 degrees around the central axis of the material guide channel through the drive mechanism, the position of the defective capacitor is adjusted. It has the characteristics of ingenious structural cooperation, comprehensive and complete appearance inspection data, and automatic loading and unloading. Attached Figure Description

[0024] Figure 1This is a perspective view of a visual inspection device for aluminum electrolytic capacitors according to the present invention.

[0025] Figure 2 This is an exploded view of a visual inspection device for aluminum electrolytic capacitors according to the present invention.

[0026] Figure 3 This is a perspective view of the feeding mechanism according to an embodiment of the present invention.

[0027] Figure 4 This is an exploded view of the visual inspection mechanism according to an embodiment of the present invention.

[0028] Figure 5 This is an exploded view of the drive mechanism according to an embodiment of the present invention.

[0029] Figure 6 This is a perspective view of the workbench according to an embodiment of the present invention.

[0030] Figure 7 For the present invention Figure 1 A magnified view of a portion of point a.

[0031] Figure 8 This is a perspective view of the capacitor entering the receiving frame in an embodiment of the present invention.

[0032] Figure 9 This is a perspective view of a capacitor rolling on a rough fabric surface in an embodiment of the present invention.

[0033] Figure 10 This is a perspective view of the vision inspection mechanism after it has been rotated 90 degrees around the axis of the material guide channel in an embodiment of the present invention.

[0034] Reference numerals: 1-Feeding mechanism, 11-Guide channel, 12-Opening, 13-Gear ring, 14-Base, 15-Control panel, 2-Vision inspection mechanism, 21-Vision inspection component, 211-Transfer plate, 212-Rack, 213-Receiving frame, 214-Through-viewing port, 215-CCD camera module, 216-First bracket, 22-Rotating component, 221-Rotating housing, 222-Second bracket, 223-Limiting frame, 224-Feet, 3-Drive mechanism, 31-Drive module, 311-Drive motor, 312-Drive shaft, 313-Limiting rib, 314-End cover, 315-Drive gear, 316-Magnetic ring, 32-Adjustment module, 321-Electromagnet, 322-Reset spring, 4-Worktable, 41-Rough fabric, 42-Qualified product unloading channel, 43-Unqualified product unloading channel, 5-Capacitor, 51-Pin. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0037] Please see Figures 1 to 10 According to one embodiment of the present invention, a visual inspection device for aluminum electrolytic capacitors includes:

[0038] Workbench 4, the surface of which is provided with a qualified product unloading channel 42 and a non-qualified product unloading channel 43;

[0039] The feeding mechanism 1 includes a material guide channel 11 and a toothed ring 13. The material guide channel 11 is disposed on the surface of the workbench 4, and the toothed ring 13 is fixedly connected to the material guide channel 11. A capacitor 5 is placed inside the material guide channel 11.

[0040] The visual inspection mechanism 2 includes a visual inspection component 21 and a rotating component 22. The visual inspection component 21 includes a translation plate 211, a rack 212, a receiving frame 213, and a CCD camera module 215. The rack 212 is fixedly connected to one side of the translation plate 211, the receiving frame 213 is fixedly connected to one end of the translation plate 211, and the CCD camera module 215 is disposed on one side of the receiving frame 213. The translation plate 211 is in sliding contact with the bottom of the guide channel 11, the translation plate 211 is slidably connected to the rotating component 22, and the rotating component 22 is movably connected to the gear ring 13. The distance between the receiving frame 213 and the surface of the worktable 4 is greater than the distance between the center of the capacitor 5 and the surface of the worktable 4.

[0041] The drive mechanism 3 is fixedly connected to the rotating assembly 22, and the gear ring 13 and the rack 212 are both connected to the drive mechanism 3 for transmission.

[0042] Please refer to the figure. Figure 4 and Figure 7 Furthermore, the rotating assembly 22 includes a rotating housing 221, a second support 222, and a limiting frame 223. The second support 222 and the limiting frame 223 are both fixedly connected to the rotating housing 221. The translation plate 211 is slidably connected to the rotating housing 221. The limiting frame 223 is movably sleeved on the surface of the toothed ring 13.

[0043] Please see Figure 3Furthermore, the feeding mechanism 1 also includes an opening 12, a base 14, and a control panel 15. An opening 12 is provided on one side of the material guide channel 11. The base 14 is fixedly connected between the material guide channel 11 and the workbench 4. The control panel 15 is fixedly connected to the base 14.

[0044] Please see Figure 4 Furthermore, the visual inspection component 21 also includes a viewing port 214 and a first bracket 216. The viewing port 214 is provided on the surface of the receiving frame 213. The first bracket 216 is fixedly connected to the receiving frame 213. The CCD camera module 215 is fixedly connected to the surface of the first bracket 216.

[0045] Please see Figure 1 and Figure 4 Furthermore, the rotating assembly 22 also includes a support leg 224, one end of which is fixedly connected to the rotating housing 221, and the other end of which is in sliding contact with the surface of the worktable 4.

[0046] Please see Figure 1 and Figure 6 Furthermore, the surface of the workbench 4 is provided with a rough fabric 41, which is distributed between the material guide channel 11 and the qualified product unloading channel 42.

[0047] In this embodiment of the invention, since the pins 51 of the capacitor 5 are exposed outside the opening 12 and the receiving frame 213, the capacitor 5 can rotate within the guide channel 1 and the receiving frame. The axis of the toothed ring 13 is aligned with the axis of the guide channel 11. The CCD camera module 215 can acquire image data of the capacitor 5 and the pins 51. The rough fabric 41 is used to increase the friction between the capacitor 5 and the worktable 4. When the moving receiving frame 213 applies a pushing force to the upper part of the capacitor 5, it can control the rolling of the capacitor 5. The guide channel 11 and the receiving frame 213 are limited only from the axial direction of the capacitor 5 to prevent it from shaking.

[0048] Please see Figure 5 and Figure 7In one embodiment of the present invention, the driving mechanism 3 includes a driving module 31, which includes a driving motor 311, a driving shaft 312, a limiting rib 313, an end cover 314, a driving gear 315, and a magnetic ring 316. The driving motor 311 is fixedly connected to the second bracket 222, and the driving shaft 312 is fixedly connected to the driving motor 311. The driving gear 315 is movably sleeved on the surface of the driving shaft 312. The surfaces of the driving shaft 312 and the driving gear 315 are respectively provided with a limiting rib 313 and a limiting groove. The limiting rib 313 and the limiting groove are slidably connected. A magnetic ring 316 is embedded on the surface of the driving gear 315. The gear ring 13 and the rack 212 are both connected to the driving gear 315 in a transmission manner. An end cover 314 is fixedly connected to the end of the driving shaft 312.

[0049] Furthermore, the drive mechanism 3 also includes an adjustment module 32, which includes an electromagnet 321 and a return spring 322. The electromagnet 321 is fixedly connected to the second bracket 222, and the return spring 322 is connected between the second bracket 222 and the drive gear 315.

[0050] In this embodiment of the invention, when the electromagnet 321 and the magnetic ring 316 are magnetically attached, the gear ring 13 is connected to the drive gear 315 in a transmission connection. When the elastic force of the return spring 322 drives the drive gear 315 to be attached to the end cover 314, the rack 212 is connected to the drive gear 315 in a transmission connection.

[0051] A method for operating a visual inspection device for aluminum electrolytic capacitors includes:

[0052] S100. When the receiving frame 213 is located directly below the guide channel 11, the capacitor 5 inside the guide channel 11 automatically rolls into the receiving frame 213. Since the distance between the bottom of the guide channel 1 and the surface of the worktable 4 is the same as the diameter of the capacitor 5, the receiving frame 213 only allows a single capacitor 5 to enter. Once it is confirmed that the capacitor 5 has entered the receiving frame 213, the electromagnet 321 is de-energized. Due to the elastic force of the return spring 322 driving the drive gear 315 to engage with the end cover 314, the rack 212 is connected to the drive gear 315. Therefore, when the drive motor 311 controls the drive gear 315 through the drive shaft 312 and the limiting rib 313... 5. When rotating, the rotating drive gear 315 controls the translation plate 211 and the receiving frame 213 to move towards the qualified product unloading channel 42 through the transmission connection with the rack 212. The translation plate 211 is used to block the guide channel 11. Since the distance between the receiving frame 213 and the surface of the worktable 4 is greater than the distance between the center of the capacitor 5 and the surface of the worktable 4, the moving receiving frame 213 applies a pushing force to the upper part of the capacitor 5 to drive the capacitor 5 to roll on the surface of the rough fabric 41. The CCD camera module 215 collects image data when the capacitor 5 rolls 360 degrees or 720 degrees to improve the integrity of the appearance image data.

[0053] S200. Upload the image of the rolling process of capacitor 5 to control panel 5, analyze the image of the rolling process of capacitor 5, and output the analysis result information. When the analysis result information is qualified, drive mechanism 3 continues to control the receiving frame 21 to move above the qualified product unloading channel 4 for automatic unloading. Capacitor 5 enters the surface of qualified product conveyor belt through qualified product unloading channel 4.

[0054] S300. When the analysis result is unqualified, the electromagnet 321 is energized. Since the electromagnet 321 and the magnetic ring 316 are magnetically attached after being energized, the gear ring 13 is connected to the drive gear 315. Therefore, the rotating drive gear 315 controls the visual inspection mechanism 2 and the capacitor to rotate 90 degrees through the transmission connection with the gear ring 13. The drive mechanism 3 is used again to control the receiving frame 21 to move above the unqualified product unloading channel 43 for automatic unloading. The capacitor 5 enters the surface of the qualified product conveyor belt through the unqualified product unloading channel 43.

[0055] Repeat the above steps until the appearance quality inspection of all capacitors 5 is completed.

[0056] In summary, this application utilizes a structural design in which the workbench 4, the feeding mechanism 1, the vision inspection mechanism 2, and the drive mechanism 3 work together. By controlling the reciprocating movement of the translation plate 2 and the receiving frame 2 through the drive mechanism 3, it can not only automatically feed materials, but also automatically drive the capacitor 5 to rotate 360 ​​degrees or 720 degrees to obtain complete image data of its surface through the CCD camera module 21. By controlling the vision inspection mechanism 2 to rotate 90 degrees around the central axis of the material guide channel 11 through the drive mechanism 3, the position of the unqualified capacitor 5 can be adjusted. It has the characteristics of ingenious structural coordination, comprehensive and complete appearance inspection data, and automatic loading and unloading.

[0057] While several embodiments and examples of the present invention have been described for those skilled in the art, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A visual inspection device for aluminum electrolytic capacitors, characterized in that, include: The workbench (4) has a qualified product unloading channel (42) and an unqualified product unloading channel (43) on its surface; The feeding mechanism (1) includes a feeding channel (11) and a toothed ring (13). The feeding channel (11) is set on the surface of the workbench (4). The toothed ring (13) is fixedly connected to the feeding channel (11). A capacitor (5) is placed inside the feeding channel (11). A visual inspection mechanism (2) is provided, comprising a visual inspection component (21) and a rotating component (22). The visual inspection component (21) comprises a translation plate (211), a rack (212), a receiving frame (213), and a CCD camera module (215). The rack (212) is fixedly connected to one side of the translation plate (211), and the receiving frame (213) is fixedly connected to one end of the translation plate (211). The CCD camera module (215) is located on one side of the receiving frame (213). The translation plate (211) is in sliding contact with the bottom of the guide channel (11). The translation plate (211) is slidably connected to the rotating component (22). The rotating component (22) is movably connected to the toothed ring (13). The distance between the receiving frame (213) and the surface of the worktable (4) is greater than the distance between the center of the capacitor (5) and the surface of the worktable (4). The drive mechanism (3) is fixedly connected to the rotating assembly (22), and the gear ring (13) and rack (212) are both connected to the drive mechanism (3) for transmission.

2. The visual inspection device for aluminum electrolytic capacitors according to claim 1, characterized in that, The rotating assembly (22) includes a rotating housing (221), a second bracket (222), and a limiting frame (223). The second bracket (222) and the limiting frame (223) are both fixedly connected to the rotating housing (221). The translation plate (211) is slidably connected to the rotating housing (221). The limiting frame (223) is movably sleeved on the surface of the toothed ring (13).

3. The visual inspection device for aluminum electrolytic capacitors according to claim 2, characterized in that, The driving mechanism (3) includes a driving module (31), which includes a driving motor (311), a driving shaft (312), a limiting rib (313), an end cap (314), a driving gear (315), and a magnetic ring (316). The driving motor (311) is fixedly connected to the second bracket (222), and the driving shaft (312) is fixedly connected to the driving motor (311). The driving gear (315) is movably sleeved on the surface of the driving shaft (312). The surfaces of the driving shaft (312) and the driving gear (315) are respectively provided with a limiting rib (313) and a limiting groove. The limiting rib (313) and the limiting groove are slidably connected. The surface of the driving gear (315) is inlaid with a magnetic ring (316). The gear ring (13) and the rack (212) are both connected to the driving gear (315) in a transmission manner. The end cap (314) is fixedly connected to the end of the driving shaft (312).

4. The visual inspection device for aluminum electrolytic capacitors according to claim 3, characterized in that, The drive mechanism (3) further includes an adjustment module (32), which includes an electromagnet (321) and a return spring (322). The electromagnet (321) is fixedly connected to the second bracket (222), and the return spring (322) is connected between the second bracket (222) and the drive gear (315). When the electromagnet (321) and the magnetic ring (316) are magnetically attached, the gear ring (13) is connected to the drive gear (315) in a transmission connection. When the elastic force of the return spring (322) drives the drive gear (315) to fit against the end cover (314), the rack (212) is connected to the drive gear (315) in a transmission connection.

5. The visual inspection device for aluminum electrolytic capacitors according to claim 4, characterized in that, The feeding mechanism (1) also includes an opening (12), a base (14) and a control panel (15). The material guide channel (11) has an opening (12) on one side. The base (14) is fixedly connected between the material guide channel (11) and the workbench (4). The control panel (15) is fixedly connected to the base (14).

6. The visual inspection device for aluminum electrolytic capacitors according to claim 5, characterized in that, The visual inspection component (21) further includes a viewing port (214) and a first bracket (216). The viewing port (214) is provided on the surface of the receiving frame (213). The first bracket (216) is fixedly connected to the receiving frame (213). The CCD camera module (215) is fixedly connected to the surface of the first bracket (216).

7. The visual inspection device for aluminum electrolytic capacitors according to claim 6, characterized in that, The rotating assembly (22) also includes a support leg (224), one end of which is fixedly connected to the rotating housing (221), and the other end of which is in sliding contact with the surface of the worktable (4).

8. The visual inspection device for aluminum electrolytic capacitors according to claim 1, characterized in that, The workbench (4) is provided with a rough fabric (41) on its surface, and the rough fabric (41) is distributed between the material guide channel (11) and the qualified product unloading channel (42).

9. An operating method for a visual inspection device for aluminum electrolytic capacitors, applied to the visual inspection device for aluminum electrolytic capacitors as described in any one of claims 1-8, characterized in that, include: S100. Under the premise that the capacitor (5) has entered the receiving frame (213), the translation plate (211) and the receiving frame (213) are controlled to move towards the qualified product unloading channel (42) by means of the transmission connection between the drive mechanism (3) and the rack (212). The translation plate (211) is used to block the guide channel (11). Since the distance between the receiving frame (213) and the surface of the worktable (4) is greater than the distance between the center of the capacitor (5) and the surface of the worktable (4), the moving receiving frame (213) achieves the purpose of driving the capacitor (5) to roll by applying a pushing force to the upper part of the capacitor (5). The CCD camera module (215) collects the image data when the capacitor (5) rolls 360 degrees or 720 degrees to improve the integrity of the appearance image data. S200. Analyze the image of the rolling process of the capacitor (5) and output the analysis result information. When the analysis result information is qualified, the drive mechanism (3) continues to control the receiving frame (21) to move above the qualified product unloading channel (4) for automatic unloading. S300. When the analysis result is unqualified, the visual inspection mechanism (2) and the capacitor are rotated 90 degrees by means of transmission connection between the drive mechanism (3) and the gear ring (13). The drive mechanism (3) is used again to control the receiving frame (21) to move above the unqualified product unloading channel (43) for automatic unloading.

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