An elastic probe test rack for SMD aluminum electrolytic capacitor aging test

Abstract

The application relates to the technical field of capacitor aging test, and proposes an elastic probe test frame for SMD aluminum electrolytic capacitor aging test, which comprises a bottom fixing mechanism serving as a device support main body; a circular test frame arranged at the top of the bottom fixing mechanism and composed of a rotating frame, a first connecting frame, a second connecting frame, a test adapter frame and a fixed joint; through the arrangement of the circular test frame and the test adapter frame and the like, aging stations and multi-parameter test stations are uniformly distributed on the same turntable, capacitors rotate in turn through the stations in a rotating circle frame indexing mode, and a contact type conductive slip ring continuously transmits electrical signals in a rotating state, so that aging power supply and parameter measurement can be continuously completed in one device without interruption, the process connection is continuous, and the problems of insufficient continuity, poor maintainability and low automation degree in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of capacitor aging testing technology, specifically to an elastic probe test fixture for aging testing of SMD aluminum electrolytic capacitors. Background Technology

[0002] In the production process of SMD aluminum electrolytic capacitors, aging tests and electrical performance tests are indispensable steps to ensure product reliability. Aging tests apply rated voltage and ripple current to the capacitor at high temperatures to accelerate the exposure of potential internal defects; electrical performance tests measure key parameters such as capacitance, equivalent series resistance, and leakage current to determine whether the product meets the standards.

[0003] Existing patent CN221860507U represents a surface-mount SMD aluminum electrolytic capacitor aging fixture. This fixture uses negative and positive charging plates to replace wires for contact with the capacitor leads, solving the wiring difficulties caused by shortening and flattening the leads during SMD capacitor installation. However, this type of fixture still requires manual placement of each capacitor into the mounting groove on the substrate, making it unsuitable for automated production lines. Furthermore, after aging, the capacitors must be removed and transferred to testing and sorting equipment for electrical performance testing, requiring manual handling between processes. Equipment such as a rotary testing and sorting device for loose capacitors uses a rotary conveyor structure. Test probes are located below the rotary table and contact the capacitor electrodes through a connection structure at the bottom of the placement slot. This allows for testing and sorting of parameters such as capacitance, loss, ESR, and leakage current. However, this type of equipment lacks an aging stage and cannot apply rated voltage and ripple current to the capacitors during the testing process, requiring a separate offline aging device.

[0004] The capacitor aging device disclosed in existing patent CN222288526U can perform static and dynamic aging on a single capacitor. However, this device is an independent aging unit and lacks automatic feeding, multi-parameter electrical testing, and appearance sorting functions. Testing before and after aging still relies on other equipment. Regarding probe maintenance, existing probe self-cleaning systems energize the probes through a cleaning signal generation circuit, using sparks and high temperatures to clean the probe surface. However, switching between the cleaning and measurement circuits is required, making simultaneous testing impossible. Another positioning cleaning device for semiconductor testing uses an air blowing channel to clean the probes, but the air blowing position is separate from the testing position, requiring the probe to be moved between the testing and cleaning positions or the machine to be stopped for cleaning. When changing test specifications, existing equipment requires shutdown and manual disassembly and assembly of the test terminals by operators, which is time-consuming and prone to installation errors due to mixing different terminal models. Summary of the Invention

[0005] This invention proposes an elastic probe test fixture for aging tests of SMD aluminum electrolytic capacitors, which solves the problems of insufficient continuity, poor maintainability, and low degree of automation in related technologies.

[0006] The technical solution of the present invention is as follows: an elastic probe test frame for aging test of SMD aluminum electrolytic capacitors, including a bottom fixing mechanism, which serves as the main support body of the equipment;

[0007] A circular test frame, positioned atop the bottom fixing mechanism, comprises a rotating frame, a first connecting frame, a second connecting frame, a test adapter frame, and a fixing joint.

[0008] The rotating frame is rotatably mounted inside the bottom fixing mechanism for rotating the test end. The first connecting frame, the test adapter frame, and the second connecting frame are sequentially fixedly connected to the outer circumference of the circular test frame. Several circumferentially distributed fixing joints are fixedly connected to both the first and second connecting frames. Each fixing joint is provided with a test mounting handle. The test mounting handles on the first and second connecting frames are respectively connected to the test end and the top connector. The top connector presses the test end to test the capacitance.

[0009] The test power mechanism is fixedly connected to the bottom fixing mechanism. Several telescopic cylinders are installed at intervals on the top of the test power mechanism. Pressing heads are installed at the output end of the telescopic cylinders and are used to press the top connector.

[0010] The input / output mechanism is located on the side of the bottom fixing mechanism. The input / output mechanism consists of an input component, a delivery robot, and an output component. The input component and the output component are respectively located on both sides of the delivery robot. The input / output mechanism is used for the extraction and placement of capacitors.

[0011] The replacement adapter mechanism consists of a rotating placement frame and a replacement component. Both the rotating placement frame and the replacement component are located inside the bottom fixing mechanism. The replacement component is installed on one side of the rotating placement frame. The replacement adapter mechanism is used to replace the test mounting handle inside the circular test fixture.

[0012] As a preferred embodiment of the present invention, the bottom fixing mechanism consists of a fixed base, a negative pressure fixing device, and several third-vision recognition devices;

[0013] The fixed base is connected to the external control box. The fixed base is provided with several circumferentially distributed placement grooves. The inner wall of the placement groove is provided with side adsorption holes, and the bottom of the placement groove is provided with bottom negative pressure holes.

[0014] Several third-vision recognition devices are evenly distributed in a circle on the top of the fixed base, and the third-vision recognition devices are arranged coaxially with the placement groove;

[0015] The negative pressure fixing device is set on the outer circumferential surface of the fixed base. The negative pressure fixing device consists of a circular pneumatic connector and several sleeve blocks. The circular pneumatic connector is fixedly connected to the outer circumferential surface of the fixed base. Several pneumatic valves are connected to the outer circumferential surface of the circular pneumatic connector. The sleeve blocks are set at the bottom of the placement groove and cover the bottom negative pressure hole. A sealing gasket is also set at the connection between the sleeve block and the fixed base. A negative pressure connecting pipe is set between the sleeve block and the pneumatic valve.

[0016] As a preferred embodiment of the present invention, the rotating frame is composed of a rotating circular frame and a stepper motor. The rotating circular frame is rotatably installed inside the fixed base. An external gear ring is fixedly connected to the bottom of the rotating circular frame. The stepper motor is installed inside the fixed base and is located on one side of the rotating circular frame. A transmission gear is installed at the output end of the stepper motor. The transmission gear meshes with the external gear ring. A rotating bearing seat is provided on the outer circumferential surface of the rotating circular frame.

[0017] The first connecting frame consists of a first fixed frame and a first pneumatic rotary joint. The first fixed frame is fixedly connected to the outer circumferential surface of the rotating circular frame, the first pneumatic rotary joint is installed on the first fixed frame, and a pressing connecting frame is fixedly connected to the outer circumferential surface of the first fixed frame.

[0018] The second connecting frame consists of a second fixed frame and a second pneumatic rotary joint. The second fixed frame is fixedly connected to the outer circumferential surface of the rotating circular frame, and the second pneumatic rotary joint is installed on the second fixed frame. The test connecting frame is fixedly connected to the outer circumferential surface of the second fixed frame.

[0019] The test adapter is composed of contact conductive slip rings, which are fixedly connected inside the rotating circular frame. Several circumferentially distributed electrical connectors are provided on the outer circumferential surface of the contact conductive slip rings.

[0020] The fixed joints are evenly distributed in a circle and are fixedly connected to the pressing connection frame and the test connection frame.

[0021] As a preferred embodiment of the present invention, the fixed joint is composed of a pneumatic clamping assembly;

[0022] The pneumatic clamping assembly consists of a pneumatic clamping frame, which is circumferentially distributed and installed on the pressing connecting frame and the testing connecting frame. At least three circumferentially distributed pneumatic clamps are slidably assembled inside the pneumatic clamping frame. A pneumatic connector is installed on the top of the pneumatic clamping frame. The pneumatic connector is connected to the first pneumatic rotary joint and the second pneumatic rotary joint through pipes. A corresponding pneumatic valve is provided at the connection point.

[0023] The test installation handle consists of a fixed sleeve and an internal sliding cylinder. The internal sliding cylinder is slidably assembled inside the fixed sleeve. The internal sliding cylinder and the fixed sleeve are connected by two symmetrically arranged elastic components. Two symmetrically arranged snap-fit ​​collars are fixedly connected to the outer circumference of the fixed sleeve. The snap-fit ​​collars are snapped into the pneumatic chuck. Both ends of the internal sliding cylinder are connected to the installation locking head by threads.

[0024] A top connector is fixedly connected to the top of the test mounting handle located on the second connecting frame. The test end is fixed inside the test mounting handle by a mounting locking head and connected to the electrical connector via a cable.

[0025] The test mounting handle located on the first connecting frame is equipped with a presser. The presser consists of a mounting shaft and two pressing heads. The mounting shaft is fixed inside the test mounting handle by a locking mounting head, and the two pressing heads are fixedly connected to both ends of the mounting shaft.

[0026] As a preferred embodiment of the present invention, the circular test frame further includes an air blowing assembly, which is installed at the bottom of the second connecting frame;

[0027] The air blowing assembly consists of an air blowing connecting frame and air blowing ends. The air blowing connecting frame is fixedly connected to the outer circumferential surface of the rotating frame. A third pneumatic rotary joint is installed on the air blowing connecting frame. Several circumferentially distributed air blowing ends are installed on the second connecting frame. The air blowing ends are connected to the third pneumatic rotary joint through pipes, and corresponding pneumatic valves are provided at the connection points.

[0028] As a preferred embodiment of the present invention, the test power mechanism consists of a top guide mounting frame and several telescopic cylinders;

[0029] The top guide mounting frame is connected to the fixed base. Several telescopic cylinders are arranged at circumferential intervals on the top of the top guide mounting frame. Several circumferentially distributed telescopic shafts are slidably assembled inside the top guide mounting frame. Some of the telescopic shafts are installed at the output end of the telescopic cylinders. A pressing head is fixedly connected to the bottom of the telescopic shaft.

[0030] As a preferred embodiment of the present invention, multiple replacement adapters are arranged evenly around the circumference inside the circular test frame. The rotating placement frame consists of a rotating seat and a circular tool holder body. The rotating seat is fixedly connected to the inside of the fixed base. A rotation power source is installed on one side of the rotating seat, and a circular tool holder body is provided at the output end of the rotating seat.

[0031] The replacement assembly consists of a lifter, a telescopic device, and a switching body. The lifter is installed inside the fixed base and on one side of the rotating placement frame. The telescopic device is installed on the lifter, and the switching body is installed on the telescopic device. A switching power source is provided at the bottom of the switching body, and a double-headed conversion handle is installed at the output end of the switching body.

[0032] As a preferred embodiment of the present invention, there are multiple input / output mechanisms, which are evenly distributed around the circumference inside the circular test frame.

[0033] The input component consists of an input vibrating screen tray, which is located on one side of the circular test frame. An input conveying plate is located on one side of the input vibrating screen tray, and a push rod is installed on one side of the input conveying plate. A partition plate is installed at the output end of the push rod.

[0034] As a preferred embodiment of the present invention, the delivery robot is composed of a universal robot, which is set on one side of the circular test frame. The output end of the universal robot is provided with an extraction end, and an identification end is provided on one side of the extraction end.

[0035] The recognition end consists of a first vision recognition device and a lighting lamp. The first vision recognition device is connected to the output end of the omnidirectional robotic arm, and the lighting lamp is set on the first vision recognition device.

[0036] The extraction end consists of a negative pressure pipeline connected to the output end of the universal manipulator. One end of the negative pressure pipeline is equipped with a displacement measuring end, and the other end of the displacement measuring end is equipped with a negative pressure adsorption end.

[0037] As a preferred embodiment of the present invention, the output component consists of an output vibrating screen tray, an output conveying plate is provided on one side of the output vibrating screen tray, and a number of equally spaced second vision recognition devices are provided on the top of the output conveying plate.

[0038] The working principle and beneficial effects of this invention are as follows:

[0039] 1. This invention uses a circular test frame and a test adapter frame to evenly distribute the aging station and multi-parameter test station on the same turntable. The capacitors rotate sequentially through each station as the circular frame rotates. At the same time, the contact conductive slip ring continuously transmits electrical signals while rotating, so that the aging power supply and parameter measurement can be completed in one device without interruption, and the process is seamless.

[0040] 2. This invention, through the design of air blowing components and replacement adapters, allows for online air blowing of the probe tip via a pneumatic rotary joint during test intervals, removing adhering substances without interrupting the test cycle. When changing capacitor specifications, the replacement component automatically picks up the spare test mounting handle from the rotating placement frame, completing disassembly and installation automatically without requiring machine shutdown or manual operation, making equipment maintenance convenient.

[0041] 3. Through the setting of delivery robot and negative pressure fixer, the capacitor is separated from the vibratory plate by the push rod and then vacuum-adsorbed and transferred by the universal robot to the placement groove. After the third vision recognition device confirms that it is in place, the negative pressure fixer adsorbs and locks the capacitor. The entire feeding process does not require manual intervention. The unloading end is automatically detected by the second vision recognition device and output in different channels, which improves the degree of automation. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure and installation of the present invention;

[0043] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0044] Figure 3 This is a schematic diagram of the overall structure of the input component of the present invention;

[0045] Figure 4 This is a schematic diagram of the overall structure of the delivery robot of the present invention;

[0046] Figure 5 This is a schematic diagram of the overall structure of the output component of the present invention;

[0047] Figure 6 This is a schematic diagram of the overall structure of the circular test fixture of the present invention;

[0048] Figure 7 This is a schematic diagram of the internal structure of the circular test fixture of the present invention;

[0049] Figure 8 This is a bottom view of the internal structure of the circular test fixture of the present invention;

[0050] Figure 9 This is a schematic diagram of the overall structure of the negative pressure fixation device of the present invention;

[0051] Figure 10 This is a schematic diagram of the installation structure of the first connecting frame and the second connecting frame of the present invention;

[0052] Figure 11 This is a schematic diagram of the overall structure of the first connecting frame and the second connecting frame of the present invention;

[0053] Figure 12 This is a schematic diagram of the overall structure of the air blowing assembly of the present invention;

[0054] Figure 13 This is a schematic diagram of the overall structure of the fixed connector of the present invention;

[0055] Figure 14 A cross-sectional view of the test mounting handle for this invention;

[0056] Figure 15 This is a schematic diagram of the overall structure of the test power mechanism of the present invention;

[0057] Figure 16 This is a schematic diagram of the overall structure of the replacement adapter mechanism of the present invention.

[0058] In the diagram: 1. Input / output mechanism; 11. Input component; 111. Input vibrating screen tray; 112. Input conveyor plate; 113. Push rod; 114. Divider plate;

[0059] 12. Delivery robot; 121. Omnidirectional robot; 122. Extraction end; 1211. Negative pressure pipeline; 1222. Negative pressure adsorption end; 1223. Displacement measurement end; 123. Identification end; 1231. First vision recognition device; 1232. Illumination lamp;

[0060] 13. Output components; 131. Output vibrating screen tray; 132. Output conveyor plate; 133. Second vision recognition device;

[0061] 2. Bottom fixing mechanism; 21. Fixing base; 211. Placement groove; 212. Side suction hole; 213. Bottom negative pressure hole; 22. Third vision recognition device;

[0062] 23. Negative pressure retainer; 231. Circular pneumatic connector; 232. Sleeve block; 233. Sealing gasket; 234. Negative pressure connecting pipe; 235. Pneumatic valve;

[0063] 3. Circular test fixture; 31. Rotating frame; 311. Rotating circular frame; 312. Rotating bearing housing; 313. External gear ring; 314. Stepper motor; 315. Transmission gear;

[0064] 32. First connecting frame; 321. First fixing frame; 322. Pressing connecting frame; 323. First pneumatic rotary joint;

[0065] 33. Second connecting frame; 331. Second fixing frame; 332. Test connecting frame; 333. Second pneumatic rotary joint;

[0066] 34. Test adapter frame; 341. Contact type conductive slip ring; 342. Electrical connector;

[0067] 35. Fixed connector; 351. Pneumatic clamping assembly; 3511. Pneumatic clamping frame; 3512. Pneumatic chuck; 3513. Pneumatic connector;

[0068] 352. Test mounting handle; 3521. Fixing sleeve; 3522. Snap-fit ​​collar; 3523. Internal sliding cylinder; 3524. Elastic component; 3525. Install locking head;

[0069] 353. Top connector; 354. Presser; 3541. Mounting shaft; 3542. Top press head;

[0070] 36. Air blowing assembly; 361. Air blowing connection frame; 362. Third pneumatic rotary joint; 363. Air blowing end;

[0071] 4. Test power mechanism; 41. Top guide mounting frame; 42. Telescopic cylinder; 43. Telescopic shaft; 44. Pressing head;

[0072] 5. Replacement adapter mechanism; 51. Rotating placement frame; 511. Rotating seat; 512. Rotating power source; 513. Circular tool holder body;

[0073] 52. Replacement components; 521. Lifting device; 522. Telescopic device; 523. Switching the main body; 524. Switching the power source; 525. Dual-head conversion handle Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0075] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0076] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0077] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0078] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0079] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0080] Example:

[0081] like Figures 1-16 As shown, an elastic probe test frame for aging tests of SMD aluminum electrolytic capacitors includes a bottom fixing mechanism 2, which serves as the main support for the equipment.

[0082] A circular test frame 3 is mounted on top of the bottom fixing mechanism 2. The circular test frame 3 consists of a rotating frame 31, a first connecting frame 32, a second connecting frame 33, a test adapter frame 34, and a fixing joint 35.

[0083] The rotating frame 31 is rotatably mounted inside the bottom fixing mechanism 2 for rotating the test end. The first connecting frame 32, the test adapter frame 34, and the second connecting frame 33 are sequentially fixedly connected to the outer circumferential surface of the circular test frame 3. Several circumferentially distributed fixing joints 35 are fixedly connected to the first connecting frame 32 and the second connecting frame 33. Each fixing joint 35 is provided with a test mounting handle 352. The test mounting handles 352 located on the first connecting frame 32 and the second connecting frame 33 are respectively connected to the test end and the top connector 353. The top connector 353 presses the test end to test the capacitor.

[0084] Test power mechanism 4 is fixedly connected to bottom fixing mechanism 2. Several telescopic cylinders 42 are installed at intervals on the top of test power mechanism 4. Pressing head 44 is installed at the output end of telescopic cylinder 42. Pressing head 44 is used to press the top connector 353.

[0085] Input / output mechanism 1 is located on the side of bottom fixing mechanism 2. Input / output mechanism 1 consists of input component 11, delivery robot 12 and output component 13. Input component 11 and output component 13 are respectively located on both sides of delivery robot 12. Input / output mechanism 1 is used for extracting and placing capacitors.

[0086] Replacement adapter 5 consists of a rotating placement frame 51 and a replacement component 52. Both the rotating placement frame 51 and the replacement component 52 are located inside the bottom fixing mechanism 2. The replacement component 52 is installed on one side of the rotating placement frame 51. Replacement adapter 5 is used to replace the test mounting handle 352 inside the circular test frame 3.

[0087] An elastic probe test frame for aging testing of SMD aluminum electrolytic capacitors comprises a bottom fixing mechanism 2, a circular test frame 3, a test power mechanism 4, an input / output mechanism 1, and a replacement adapter 5. The bottom fixing mechanism 2 is bolted to the workbench. The workbench contains an electrical control cabinet and an air source treatment unit to provide power and pneumatic control for the equipment. The circular test frame 3 is mounted on top of the bottom fixing mechanism 2 and is a rotating frame 31 driven by a stepper motor 314 via a gear pair. The rotating frame 31 is connected to the bottom fixing mechanism 2 via crossed roller bearings. To achieve circumferential indexing rotation, a first connecting frame 32 and a second connecting frame 33 are fixed on the outer circumferential surface of the rotating frame 31. A test adapter frame 34 is provided between the first connecting frame 32 and the second connecting frame 33. Several fixed joints 35 are evenly distributed on the first connecting frame 32 and the second connecting frame 33. The fixed joints 35 are arranged at equal angles along the circumferential direction. Each fixed joint 35 contains a test mounting handle 352. The test mounting handle 352 on the first connecting frame 32 is used to clamp the test end, and the test mounting handle 352 on the second connecting frame 33 is used to install the top connector 353. The end of the top connector 353... Spatially opposite the tail of the test end, the test power mechanism 4 is fixed above the bottom fixing mechanism 2. The output end of its telescopic cylinder 42 is connected to the pressing head 44. When the cylinder extends, the pressing head 44 contacts the top connector 353 and transmits force to the test end, causing the tip of the elastic probe to press against the electrode of the capacitor under test. The input / output mechanism 1 is located on the side of the circular test frame 3. Its delivery robot 12 adopts a four-axis rectangular coordinate structure and is equipped with a vacuum suction cup at the end for transferring the capacitor between the input component 11, the circular test frame 3, and the output component 13. The replacement adapter 5 is located inside the bottom fixing mechanism 2. In the internal space, the rotating placement rack 51 is a rotatable circular tool holder, which stores spare test mounting handles 352 of different specifications. The replacement component 52, through the cooperation of the lifting device 521 and the telescopic device 522, picks up the spares and replaces the test mounting handles 352 on the circular test rack 3. During operation, the capacitor is fed in by the input component 11, and the delivery robot 12 puts it into the carrier of the circular test rack 3. The rotating frame 31 rotates to transport the capacitor to each test station in sequence. The test power mechanism 4 drives the pressing head 44 to complete the test. Finally, the delivery robot 12 takes out the capacitor and sends it to the output component 13.

[0088] The bottom fixing mechanism 2 consists of a fixed base 21, a negative pressure fixing device 23, and several third vision recognition devices 22;

[0089] The fixed base 21 is connected to the external control box. The fixed base 21 is provided with several circumferentially distributed placement grooves 211. The inner wall of the placement grooves 211 is provided with side adsorption holes 212. The bottom of the placement grooves 211 is provided with bottom negative pressure holes 213.

[0090] Several third-vision recognizers 22 are evenly distributed in a circle on the top of the fixed base 21, and the third-vision recognizers 22 are arranged coaxially with the placement groove 211.

[0091] The negative pressure fixing device 23 is set on the outer peripheral surface of the fixed base 21. The negative pressure fixing device 23 consists of a circular pneumatic connector 231 and several sleeves 232. The circular pneumatic connector 231 is fixedly connected to the outer peripheral surface of the fixed base 21. Several pneumatic valves 235 are connected to the outer peripheral surface of the circular pneumatic connector 231. The sleeves 232 are set at the bottom of the placement groove 211 and cover the bottom negative pressure hole 213. A sealing gasket 233 is also provided at the connection between the sleeve 232 and the fixed base 21. A negative pressure connecting pipe 234 is provided between the sleeve 232 and the pneumatic valves 235.

[0092] The bottom fixing mechanism 2 consists of a fixed base 21, a negative pressure fixing device 23, and several third-vision recognition devices 22. The fixed base 21 is hollow inside to accommodate electrical components and air pipes. Several circumferentially distributed placement grooves 211 are machined on the top surface of the base. The diameter of the distribution circle of the placement grooves 211 is the same as the diameter of the distribution circle of the fixing connector 35 on the circular test frame 3. A side adsorption hole 212 is opened on the inner side wall of each placement groove 211. The side adsorption hole 212 is connected through the transverse air passage inside the base. A bottom negative pressure hole 213 is opened at the center of the bottom surface of the placement groove 211. The bottom negative pressure hole 213 is connected through the longitudinal air passage inside the base. The negative pressure fixing device 23 is used to generate and control the adsorption force. The circular pneumatic connector 231 of the negative pressure fixing device 23 is an annular hollow tube fitting, which is sleeved on the outer circumferential surface of the fixed base 21 and secured by a clamp. The circular pneumatic connector 231 is fixed with a hoop. The air chamber inside the circular pneumatic connector 231 is connected to an external vacuum generator through a pipeline. The vacuum generator uses compressed air to generate negative pressure through a Laval nozzle. Several pneumatic valves 235 are installed on the outer circumference of the circular pneumatic connector 231. Each pneumatic valve 235 corresponds to a placement groove 211. The pneumatic valve 235 is a two-position two-normally closed solenoid valve. When the coil is energized, the valve core moves to open the air passage. When the power is off, the spring resets and closes the air passage. The sleeve block 232 is set at the bottom of the placement groove 211. The sleeve block 232 is a metal block with an air passage inside. One end is connected to the bottom negative pressure hole 213, and the other end is connected to the air outlet of the pneumatic valve 235 through the negative pressure connecting pipe 234. A sealing gasket 233 is placed between the contact surface of the sleeve block 232 and the fixed base 21. The sealing gasket 233 is made of fluororubber material. After being compressed, it fills the gap between the mating surfaces to ensure airtightness.

[0093] The third vision recognition device 22 uses a CMOS industrial camera with the lens facing down and mounted on the top of the fixed base 21. Each camera is aligned with a placement groove 211. The camera has a built-in image processing chip and determines the presence and orientation of an object in the placement groove 211 by comparing it with a template image. When the test mounting handle 352 or the capacitor carrier is placed in the placement groove 211, the corresponding pneumatic valve 235 is energized and opened. The negative pressure generated by the vacuum generator is transmitted through the circular pneumatic connector 231, the pneumatic valve 235, and the negative pressure connecting pipe 234 to the bottom negative pressure hole 213 and the side adsorption hole 212, adsorbing and fixing the object in the placement groove 211. The third vision recognition device 22 simultaneously takes pictures to confirm the fixed state.

[0094] The rotating frame 31 consists of a rotating circular frame 311 and a stepper motor 314. The rotating circular frame 311 is rotatably mounted inside the fixed base 21. An external gear ring 313 is fixedly connected to the bottom of the rotating circular frame 311. The stepper motor 314 is mounted inside the fixed base 21 and is located on one side of the rotating circular frame 311. A transmission gear 315 is mounted on the output end of the stepper motor 314. The transmission gear 315 meshes with the external gear ring 313. A rotating bearing seat 312 is provided on the outer circumferential surface of the rotating circular frame 311.

[0095] The first connecting frame 32 is composed of a first fixed frame 321 and a first pneumatic rotary joint 323. The first fixed frame 321 is fixedly connected to the outer peripheral surface of the rotating circular frame 311. The first pneumatic rotary joint 323 is installed on the first fixed frame 321. A pressing connecting frame 322 is fixedly connected to the outer peripheral surface of the first fixed frame 321.

[0096] The second connecting frame 33 consists of a second fixed frame 331 and a second pneumatic rotary joint 333. The second fixed frame 331 is fixedly connected to the outer circumferential surface of the rotating circular frame 311. The second pneumatic rotary joint 333 is installed on the second fixed frame 331. A test connecting frame 332 is fixedly connected to the outer circumferential surface of the second fixed frame 331.

[0097] The test adapter frame 34 is composed of a contact conductive slip ring 341, which is fixedly connected to the inside of the rotating circular frame 311. Several circumferentially distributed electrical connectors 342 are provided on the outer circumferential surface of the contact conductive slip ring 341.

[0098] The fixed connectors 35 are evenly distributed around the circumference and are fixedly connected to the pressing connector 322 and the test connector 332.

[0099] The rotating frame 31 consists of a rotating circular frame 311 and a stepper motor 314. The rotating circular frame 311 is a ring-shaped welded part, and its bottom is mounted inside the fixed base 21 via a crossed roller bearing, allowing it to rotate freely around a vertical axis. A rotating bearing seat 312 is fixedly connected to the outer circumference of the rotating circular frame 311. The rotating bearing seat 312 is used as a support bearing for mounting other auxiliary components. An external gear ring 313, which is an involute spur gear, is fixed to the bottom surface of the rotating circular frame 311 via bolts. The stepper motor 314 is mounted inside the fixed base 21, and a transmission gear 315 is mounted on its output shaft via a key connection. The transmission gear 315 meshes with the external gear ring 313. The stepper motor 314 receives pulse signals from the controller, rotating by one step angle for each pulse received. After reduction by a gear pair, it drives the rotating frame 311 to rotate in increments. The first connecting frame 32 consists of a first fixed frame 321 and a first pneumatic rotary joint 323. The first fixed frame 321 is fixedly connected to the outer circumferential surface of the rotating frame 311 by bolts. The first pneumatic rotary joint 323 is installed on the outer circumferential surface of the first fixed frame 321. The rotor end of the first pneumatic rotary joint 323 rotates with the first fixed frame 321, and the stator end is fixed to the fixed base 21. It is used to deliver compressed air from the fixed end to the rotating end. The outer circumferential surface of the first fixed frame 321 is provided with... The first connecting frame 322 has several evenly distributed mounting holes for mounting the fixed connectors 35. The second connecting frame 33 consists of a second fixed frame 331 and a second pneumatic rotary connector 333, with the same structure as the first connecting frame 32. The test connecting frame 332 is welded to the outer circumference of the second fixed frame 331. The test adapter 34 is composed of a contact conductive slip ring 341, which is fixedly installed at the center of the rotating circular frame 311. The stator terminal is connected to an external testing instrument via a cable, and the rotor terminal electrical connector 342 is connected to the test terminals in each fixed connector 35 via cables, thus realizing... In the rotational state, the conductive slip ring uses a precious metal alloy ring channel inside to conduct electricity in contact with the alloy brush bristles. A constant contact pressure is maintained between the ring channel and the brush bristles. The fixed connector 35 is installed with the test mounting handle 352 through the pneumatic clamping assembly 351. The handles are evenly distributed on the pressing connecting frame 322 and the test connecting frame 332. When rotating, the stepper motor 314 drives the external gear ring 313 to drive the rotating circular frame 311 to rotate. The first connecting frame 32 and the second connecting frame 33 rotate accordingly. The first pneumatic rotary connector 323 and the second pneumatic rotary connector 333 ensure that the air circuit is continuously supplied with air during rotation. The contact conductive slip ring 341 ensures stable transmission of electrical signals during rotation.

[0100] The fixed connector 35 is composed of a pneumatic clamping assembly 351;

[0101] The pneumatic clamping assembly 351 is composed of a pneumatic clamping frame 3511, which is circumferentially evenly mounted on the pressing connecting frame 322 and the test connecting frame 332. At least three circumferentially evenly distributed pneumatic clamps 3512 are slidably assembled inside the pneumatic clamping frame 3511. A pneumatic connector 3513 is installed on the top of the pneumatic clamping frame 3511. The pneumatic connector 3513 is connected to the first pneumatic rotary joint 323 and the second pneumatic rotary joint 333 through pipes. A corresponding pneumatic valve 235 is provided at the connection point.

[0102] The test mounting handle 352 consists of a fixed sleeve 3521 and an inner sliding cylinder 3523. The inner sliding cylinder 3523 is slidably assembled inside the fixed sleeve 3521. The inner sliding cylinder 3523 and the fixed sleeve 3521 are connected by two symmetrically arranged elastic components 3524. Two symmetrically arranged snap-fit ​​collars 3522 are fixedly connected to the outer circumference of the fixed sleeve 3521. The snap-fit ​​collars 3522 are snapped into each other with the pneumatic chuck 3512. Both ends of the inner sliding cylinder 3523 are connected to the mounting locking head 3525 by threads.

[0103] A top connector 353 is fixedly connected to the top of the test mounting handle 352 located on the second connecting frame 33. The test end is fixed in the test mounting handle 352 by the mounting locking head 3525 and connected to the electrical connector 342 by a cable.

[0104] The test mounting handle 352 located on the first connecting frame 32 is equipped with a presser 354. The presser 354 consists of a mounting shaft 3541 and two pressing heads 3542. The mounting shaft 3541 is fixed inside the test mounting handle 352 by a locking mounting head 3525, and the two pressing heads 3542 are respectively fixedly connected to both ends of the mounting shaft 3541.

[0105] The circular test frame 3 also includes an air blowing assembly 36, which is installed at the bottom of the second connecting frame 33;

[0106] The air blowing assembly 36 consists of an air blowing connecting frame 361 and an air blowing end 363. The air blowing connecting frame 361 is fixedly connected to the outer circumferential surface of the rotating frame 31. A third pneumatic rotary joint 362 is installed on the air blowing connecting frame 361. Several circumferentially distributed air blowing ends 363 are installed on the second connecting frame 33. The air blowing ends 363 are connected to the third pneumatic rotary joint 362 through pipes. A corresponding pneumatic valve 235 is provided at the connection point.

[0107] The pneumatic clamping assembly 351 consists of a pneumatic clamping frame 3511, a pneumatic chuck 3512, and a pneumatic connector 3513. The pneumatic clamping frame 3511 is a cylindrical shell, which is circumferentially mounted on the pressing connector 322 and the testing connector 332 by bolts. Three evenly distributed radial grooves are machined on the inner wall of the pneumatic clamping frame 3511, and a pneumatic chuck 3512 is slidably fitted in each groove. The pneumatic chuck 3512 is a piston block with a wedge-shaped surface and a return spring at its tail. A [missing information - likely a device or component] is mounted on the top of the pneumatic clamping frame 3511. Pneumatic connector 3513 is connected to either the first pneumatic rotary joint 323 or the second pneumatic rotary joint 333 via an air pipe. A corresponding pneumatic valve 235 is connected in series in the connecting pipe. When the pneumatic valve 235 is energized and opened, compressed air enters the inner cavity of the pneumatic clamping frame 3511 through the pneumatic rotary joint, pushing the pneumatic clamp 3512 to extend radially inward and clamp the test mounting handle 352. When the pneumatic valve 235 is de-energized and closed and exhausts air, the return spring pushes the pneumatic clamp 3512 to retract outward and release the test mounting handle 352.

[0108] The test mounting handle 352 consists of a fixed sleeve 3521 and an internal sliding cylinder 3523. The fixed sleeve 3521 is a hollow circular tube with two symmetrically arranged snap-fit ​​rings 3522 fixedly connected to its outer circumference. The outer circular surface of the snap-fit ​​rings 3522 is machined with a conical groove that matches the wedge-shaped surface of the pneumatic chuck 3512. When the pneumatic chuck 3512 extends, the wedge-shaped surface engages with the conical groove to achieve snap-fit ​​locking. The internal sliding cylinder 3523 is slidably assembled inside the fixed sleeve 3521, and the two are connected by two symmetrically arranged elastic components 3524. The elastic components 3524 consist of a compression spring and a guide rod, allowing the internal sliding cylinder 3523 to elastically extend and retract in the axial direction. Both ends of the internal sliding cylinder 3523 are threadedly connected to mounting locking heads 3525, which are used to fix the test end or top connector 353. The top connector 353 is fixedly connected to the top of the test mounting handle 352 on the second connecting frame 33. The top connector 353 is a metal cylinder, and its top end is used to withstand the downward pressure of the pressing head 44. The inside of the test mounting handle 352 on the first connecting frame 32 is provided with a presser 354. The presser 354 is composed of... The device consists of a mounting shaft 3541 and two pressure heads 3542. The mounting shaft 3541 is a metal shaft that is clamped and fixed by a mounting locking head 3525. The two pressure heads 3542 are fixedly connected to the two ends of the mounting shaft 3541 respectively. The upper pressure head 3542 contacts the pressing head 44 to bear the downward pressure, and the lower pressure head 3542 contacts the tail of the test end to transmit pressure. During the test, the pressing head 44 presses down to push the pressure head 3542, and the pressure head 3542 transmits the force to the lower pressure head 3542 through the mounting shaft 3541. The lower pressure head 3542 then presses the test end. At the same time, the internal sliding cylinder 3523 provides elastic buffer under the action of the elastic component 3524, so that the elastic probe of the test end presses against the capacitor electrode with a constant contact pressure.

[0109] The test power mechanism 4 consists of a top guide mounting frame 41 and several telescopic cylinders 42;

[0110] The top guide mounting frame 41 is connected to the fixed base 21. Several telescopic cylinders 42 are arranged at circumferential intervals on the top of the top guide mounting frame 41. Several circumferentially distributed telescopic shafts 43 are slidably assembled inside the top guide mounting frame 41. Some of the telescopic shafts 43 are installed at the output end of the telescopic cylinders 42. A pressing head 44 is fixedly connected to the bottom of the telescopic shaft 43.

[0111] The air blowing assembly 36 is installed at the bottom of the second connecting frame 33 and is used to clean the contact area between the capacitor and the probe by blowing air to remove micro-dust particles that may be attached to the electrode surface or the tip of the probe. The air blowing assembly 36 consists of an air blowing connecting frame 361 and air blowing ends 363. The air blowing connecting frame 361 rotates synchronously with the rotating frame 31. A third pneumatic rotary joint 362 is installed on the air blowing connecting frame 361. The structure of the third pneumatic rotary joint 362 is the same as that of the aforementioned pneumatic rotary joint. The rotor end rotates with the air blowing connecting frame 361, and the stator end is fixed on the bottom fixing mechanism 2. The stator end is connected to an external compressed air source through a pipeline. Several circumferentially distributed air blowing ends 363 are installed on the second connecting frame 33. The number of air blowing ends 363 is the same as the number of fixed joints 35. Each air blowing end 363 corresponds to a fixed joint 35 position. The air blowing end 363 consists of an air nozzle. The air outlet direction of the air nozzle can be manually adjusted to align with the contact area between the probe and the capacitor. Each air-blowing end 363 is connected to the third pneumatic rotary joint 362 via an independent pipeline, and a corresponding pneumatic valve 235 is connected in series on the connecting pipeline. The pneumatic valve 235 is a two-position, normally closed solenoid valve. Its control logic is driven by a PLC output module. When the PLC output signal energizes the coil of the pneumatic valve 235, compressed air flows from the third pneumatic rotary joint 362 through the pneumatic valve 235 and pipeline to the blowing end 363, where a high-speed airflow is ejected from the nozzle for cleaning. When the pneumatic valve 235 is de-energized, the air path closes and blowing stops. The blowing sequence is coordinated with the rotational indexing of the circular test frame 3: during the rotation of the rotating frame 31 to the next station, the pneumatic valve 235 corresponding to the previous station can be programmed to open briefly, using the gap in the turntable movement to clean the probe tip that has just completed the test. Blowing can also be initiated after the capacitor is placed in the carrier and before the probe is pressed down for testing, to pre-remove foreign objects from the capacitor electrode surface. The third pneumatic rotary joint 362 ensures that the air supply is not interrupted due to pipeline entanglement during continuous rotation or intermittent indexing of the rotating frame 31. The blowing assembly 36 improves the reliability of test contact and reduces test data deviation caused by poor contact.

[0112] Multiple replacement adapters 5 are evenly distributed around the inside of the circular test frame 3. The rotating placement frame 51 consists of a rotating seat 511 and a circular tool holder body 513. The rotating seat 511 is fixedly connected to the inside of the fixed base 21. A rotating power source 512 is installed on one side of the rotating seat 511. The circular tool holder body 513 is provided at the output end of the rotating seat 511.

[0113] The replacement component 52 consists of a lifter 521, a telescopic device 522, and a switching body 523. The lifter 521 is installed inside the fixed base 21 and on one side of the rotating placement frame 51. The telescopic device 522 is installed on the lifter 521, and the switching body 523 is installed on the telescopic device 522. A switching power source 524 is provided at the bottom of the switching body 523, and a double-headed conversion handle 525 is installed at the output end of the switching body 523.

[0114] Multiple replacement adapter mechanisms 5 are evenly distributed circumferentially within the internal space of the circular test frame 3. Each replacement adapter mechanism 5 consists of a rotating placement frame 51 and a replacement assembly 52. ​​The rotating placement frame 51 consists of a rotating base 511 and a circular tool holder body 513. The rotating base 511 is fixedly mounted on the internal base plate of the fixed base 21, and contains a worm gear reducer. The input shaft of the reducer is connected to a rotational power source 512, which is a stepper motor 314. The circular tool holder body 513 is mounted on the output end of the rotating base 511, i.e., the worm gear shaft. The tool holder body has a disc-shaped structure, and its outer edge is machined with several evenly distributed... Each tool slot is used to store a spare test mounting handle 352. The shape of the tool slot matches the outer contour of the snap-fit ​​collar 3522 of the test mounting handle 352 to achieve positioning. The replacement component 52 is set on one side of the rotating placement frame 51 and consists of a lifter 521, a telescopic device 522 and a switching body 523. The lifter 521 adopts a lead screw linear module, which is driven by a stepper motor 314 to rotate the lead screw and drive the nut seat to rise and fall. The lifter 521 is installed on the inner base plate of the fixed base 21. The telescopic device 522 is installed on the nut seat of the lifter 521 and adopts a cylinder or electric push rod 113. The output end extends and retracts in the horizontal direction. The switching body 523 is installed at the output end of the telescopic device 522, and a switching power source 524 is set at its bottom. The switching power source 524 is a small stepper motor 314, and its output shaft is connected to the double-headed conversion handle 525. The double-headed conversion handle 525 is a rotating arm with a gripper at each end. One gripper is used to grab the spare test mounting handle 352 from the circular tool holder body 513, and the other gripper is used to remove the currently used test mounting handle 352 from the fixed joint 35 of the circular test frame 3. The gripper adopts a pneumatic gripping finger structure, and its opening and closing are controlled by a pneumatic valve 235. The replacement process is as follows: circular test frame 3. Rotate to align the fixed connector 35 to be replaced with the replacement component 52, and raise the lifter 521 to the operating height; extend the telescopic device 522 to bring the double-headed conversion handle 525 close to the target, and the empty gripper first grabs the old test mounting handle 352 on the fixed connector 35. After the pneumatic chuck 3512 is released, the telescopic device 522 retracts and pulls it out; switch the power source 524 to drive the double-headed conversion handle 525 to rotate and align the other end of the spare part with the fixed connector 35, extend the telescopic device 522 to insert the spare test mounting handle 352 into the fixed connector 35, and the pneumatic chuck 3512 clamps it; release the gripper, retract the telescopic device 522, and the replacement is complete.

[0115] There are multiple input / output mechanisms 1, which are evenly distributed around the circumference inside the circular test frame 3;

[0116] The input component 11 consists of an input vibrating screen tray 111, which is located on one side of the circular test frame 3. An input conveying plate 112 is provided on one side of the input vibrating screen tray 111, and a push rod 113 is installed on one side of the input conveying plate 112. A partition plate 114 is installed at the output end of the push rod 113.

[0117] The input component 11 consists of an input vibrating screen tray 111, an input conveyor plate 112, a push rod 113, and a partition plate 114. The input vibrating screen tray 111 is an electromagnetic vibrating tray with a spiral upward track on its inner wall. A directional screening structure is located at the end of the track. This structure utilizes the differences in the capacitor's center of gravity and shape to automatically adjust the capacitors to a uniform posture and arrange them for output during vibration. The input conveyor plate 112 is positioned between the outlet of the input vibrating screen tray 111 and the circular test frame 3. The top surface of the conveyor plate is a flat slide, the width of which is adapted to the capacitor's dimensions. A stop block is located at the end of the slide to limit the capacitor's stopping position. The push rod 113 is a miniature cylinder, mounted on the side of the input conveyor plate 112 via a bracket. A partition plate 114 is installed at its output end. The partition 114 is an L-shaped thin plate with a notch at the front end that can accommodate a single capacitor. The movement of the push rod 113 is controlled by a PLC-controlled solenoid valve. When the push rod 113 retracts, the notch of the partition 114 aligns with the conveyor slide, and a capacitor enters the notch. When the push rod 113 extends, the partition 114 moves forward, pushing the single capacitor in the notch to the loading and picking position. At the same time, the side wall of the partition 114 blocks the subsequent capacitors on the conveyor slide, realizing single-capacitor separation and feeding. After the delivery robot 12 moves to the loading and picking position, its extraction end 122 descends to absorb the capacitor and transfer it to the carrier of the circular test frame 3. The reciprocating motion of the push rod 113 is synchronized with the picking action of the delivery robot 12 and the indexing rotation of the circular test frame 3.

[0118] The delivery robot 12 is composed of a universal robot 121, which is set on one side of the circular test frame 3. The output end of the universal robot 121 is provided with an extraction end 122, and an identification end 123 is provided on one side of the extraction end 122.

[0119] The recognition end 123 consists of a first visual recognizer 1231 and an illumination lamp 1232. The first visual recognizer 1231 is connected to the output end of the universal robot 121, and the illumination lamp 1232 is set on the first visual recognizer 1231.

[0120] The extraction end 122 is composed of a negative pressure pipeline 1211, which is connected to the output end of the universal manipulator 121. A displacement measuring end 1223 is installed at one end of the negative pressure pipeline 1211, and a negative pressure adsorption end 1222 is installed at the other end of the displacement measuring end 1223.

[0121] The delivery robot 12 consists of a universal robot 121, an extraction end 122, and an identification end 123. The universal robot 121 adopts a four-axis articulated structure, with its base fixed to the side platform of the bottom fixing mechanism 2. Each joint of the universal robot 121 is driven by a servo motor via a harmonic reducer, enabling translational and lifting movements within a spatial range. Its end effector moves along a preset trajectory under the programming of the controller. The extraction end 122 is mounted on the end flange of the universal robot 121 and mainly performs the picking and placing of capacitors. The extraction end 122 consists of a negative pressure pipeline 1211, a displacement measuring end 1223, and a negative pressure adsorption end 1222. The negative pressure pipeline 1211 is a metal tube, one end of which is connected to the vacuum interface at the end of the universal manipulator 121 via a connector. The vacuum interface is connected to the vacuum generator via a solenoid valve. When the solenoid valve is energized, the vacuum generator generates negative pressure, which is transmitted through the negative pressure pipeline 1211 to the negative pressure adsorption end 1222. When the power is off, the negative pressure is cut off and the atmosphere is connected to release the pressure. The displacement measuring end 1223 is installed at one end of the negative pressure pipeline 1211 and uses a laser displacement sensor. The sensor emits a laser beam to irradiate the target surface and calculates the distance value by receiving the reflected light. This is used to detect the distance between the negative pressure adsorption end 1222 and the top surface of the capacitor to prevent excessive impact on the capacitor during descent. The negative pressure adsorption end 1222 is installed at one end of the displacement measuring end 1223 and uses a rubber suction nozzle. When the end face of the suction nozzle is in contact with the top surface of the capacitor, a sealed cavity is formed. The negative pressure is transmitted to the sealed cavity through the pipeline to generate an adsorption force to grab the capacitor. The identification end 123 is set in a position parallel to the extraction end 122 and consists of a first vision recognition device 1231 and an illumination lamp 1232. The first vision recognition device 1231 uses an industrial camera with a built-in image processor to photograph the appearance of the capacitor and determine its polarity and appearance defects. The illumination lamp 1232 uses a ring LED light source and is installed around the lens of the first vision recognition device 1231 to provide uniform illumination and eliminate shadows. After the extraction end 122 picks up the capacitor, the identification end 123 takes a picture. If reverse polarity or abnormal appearance of the capacitor is detected, a signal is sent to the control system, and the capacitor will be placed separately in the defective product area.

[0122] The output component 13 consists of an output vibrating screen tray 131. An output conveying plate 132 is provided on one side of the output vibrating screen tray 131, and several equally spaced second vision recognition devices 133 are provided on the top of the output conveying plate 132.

[0123] The output component 13 consists of an output vibrating screen tray 131, an output conveyor plate 132, and a second vision recognition device 133. The structure of the output vibrating screen tray 131 is similar to that of the input vibrating screen tray 111. It adopts the principle of electromagnetic vibration and is used to receive the capacitors that have completed testing and are removed from the circular test frame 3 by the delivery robot 12. The output conveyor plate 132 is located between the entrance of the output vibrating screen tray 131 and the unloading position of the circular test frame 3. The top surface of the conveyor plate has a parallel slide along its length, and the end of the slide extends into the tray cavity of the output vibrating screen tray 131. Several equidistantly distributed second vision recognition devices 133 are arranged on the top of the output conveyor plate 132. The second vision recognition devices 133 are arranged along the length of the slide of the conveyor plate, and each recognition device corresponds to a detection area. The second vision recognition device 133 adopts a CMOS industrial camera with the lens facing downward and has a built-in image processing algorithm. Used to identify visible defects in capacitor appearance such as bulging, leakage, and shell cracking, and to check whether the markings on the capacitor surface are clear and legible. The fields of view edges of adjacent identifiers overlap to ensure no blind spots. During operation, the delivery robot 12 places the tested capacitors onto the feed end of the output conveyor plate 132. The capacitors slide along the slide and pass through the detection areas of each second vision identifier 133 in sequence. Each identifier takes an image and analyzes it. If any identifier determines that the capacitor appearance is unqualified, it outputs a signal to the control system. The control system records the capacitor as a defective product. After the capacitor slides into the output vibrating screen tray 131, the tray is divided into zones for collection according to the qualified and unqualified signals given by the control system. The tray is equipped with a channel baffle, and the baffle is controlled by an electromagnetic driver to swing in the direction of swing. Qualified products are guided into the qualified product collection channel, and unqualified products are guided into the waste product collection channel, thus completing the sorting and output of the capacitors.

[0124] Working principle: The SMD aluminum electrolytic capacitor to be tested is fed into the input vibrating screen tray 111. The input vibrating screen tray 111 drives the capacitor to move upward along the spiral track through electromagnetic vibration. The directional screening structure at the end of the track uses the differences in the center of gravity and shape characteristics of the capacitors to automatically adjust the capacitors to a uniform posture and arrange them for output to the input conveyor plate 112. The capacitor slides along the slide rail on the top surface of the input conveyor plate 112 to the end stop block. The PLC controls the solenoid valve to retract the push rod 113, and the notch of the separator plate 114 aligns with the slide rail, allowing one capacitor to enter the notch. The push rod 113 then extends, and the separator plate 114 pushes the single capacitor in the notch to the loading and picking position. At the same time, the side wall of the separator plate 114 blocks subsequent capacitors behind, achieving single-capacity separation. The delivery robot 1... The omnidirectional robotic arm 121 of 2 is driven by servo motors through harmonic reducers. The end effector moves to the loading and picking position according to the preset trajectory. The negative pressure adsorption end 1222 of the extraction end 122 descends and approaches the top surface of the capacitor. The laser displacement sensor of the displacement measuring end 1223 detects the distance value in real time to prevent collision. After the negative pressure adsorption end 1222 is in contact with the top surface of the capacitor, the solenoid valve is energized. The negative pressure generated by the vacuum generator is transmitted to the suction nozzle through the negative pressure pipeline 1211 to form a sealed cavity to adsorb and grab the capacitor. The first vision recognizer 1231 of the recognition end 123 takes a picture of the appearance of the capacitor under the illumination of the ring LED light source. The image processor judges whether the polarity is correct and whether there are appearance defects. If an abnormality is detected, the control system marks the capacitor as a defective product and places it separately.

[0125] The delivery robot 12 transfers the capacitor to the circular test frame 3. The end of the omnidirectional robot 121 moves to directly above the placement groove 211 on the fixed base 21. The negative pressure adsorption end 1222 releases the capacitor, causing it to fall into the placement groove 211. The third vision recognition device 22 captures an image inside the placement groove 211 and determines whether the capacitor is placed and whether its posture is correct by comparing it with the template. After confirming that the capacitor is in place, the pneumatic valve 235 corresponding to the negative pressure fixer 23 is energized and opened. The negative pressure generated by the external vacuum generator is transmitted to the sleeve block 232 through the internal air chamber of the circular pneumatic connector 231, the pneumatic valve 235, and the negative pressure connecting pipe 234. Then, the capacitor is adsorbed and fixed in the placement groove 211 through the bottom negative pressure hole 213 and the side adsorption hole 212. The stepper motor 314 of the circular test frame 3 connects to... The controller pulse signal drives the transmission gear 315 to rotate. The transmission gear 315 meshes with the external gear ring 313, causing the rotating frame 311 to rotate around the vertical axis through the cross roller bearing. When the rotating frame 311 rotates, the first connecting frame 32 and the second connecting frame 33 rotate accordingly. The rotor ends of the first pneumatic rotary joint 323 and the second pneumatic rotary joint 333 rotate with the connecting frame, while the stator end is fixed on the fixed base 21 and remains stationary. Compressed air is delivered from the fixed end to the rotating end through the rotary joint. The stator end of the contact conductive slip ring 341 is connected to the external testing instrument through a cable, and the electrical connector 342 at the rotor end is connected to each testing end through a cable. The metal alloy ring track and the alloy brush filament maintain a constant contact pressure during rotation to achieve continuous transmission of electrical signals.

[0126] The capacitor rotates to the test position with the rotating frame 311. After receiving the PLC command, the solenoid valve of the telescopic cylinder 42 of the test power mechanism 4 switches the air path, and compressed air enters the upper chamber of the cylinder to push the piston rod downward. The directly connected telescopic shaft 43 slides down along the guide hole of the top guide mounting frame 41. The adjacent telescopic shaft 43, which is linked by the connecting piece 45, moves down synchronously. The pressing head 44 contacts the top connector 353 located on the second connecting frame 33. After the top connector 353 is subjected to force, it transmits the pressure to the pressing head 3542 in the test mounting handle 352. The pressing head 3542 transmits the force to the lower pressing head 3542 through the mounting shaft 3541. The lower pressing head 3542 presses the test end located on the first connecting frame 32. The internal sliding cylinder 3523 provides buffering by elastically extending and retracting along the axial direction of the fixed sleeve 3521 under the action of the compression spring of the elastic component 3524 and the guide rod. The elastic probe at the test end is pressed against the capacitor electrode with constant contact pressure to complete the electrical connection. External testing instruments test the capacitor for parameters such as capacitance, equivalent series resistance, and leakage current through the contact conductive slip ring 341 and cable, or apply rated voltage and ripple current for aging. During the test, the rotor end of the third pneumatic rotary joint 362 of the air blowing assembly 36 rotates with the air blowing connection frame 361, while the stator end remains stationary and connected to the external compressed air source. When the rotating frame 31 rotates to the gap of the next station or before the probe is pressed down after the capacitor is placed in the carrier, the PLC controls the corresponding pneumatic valve 235 to be energized and opened. Compressed air reaches the air blowing end 363 through the third pneumatic rotary joint 362, the pneumatic valve 235 and the pipeline. High-speed airflow is sprayed from the nozzle to blow clean the probe tip and the contact area of ​​the capacitor electrode to remove dust particles. When the pneumatic valve 235 is de-energized, the air circuit is closed and the air blowing stops.

[0127] When a test specification needs to be changed, the replacement adapter 5 is activated, the circular test frame 3 rotates to align the fixed connector 35 to be replaced with the replacement component 52, the linear module of the lifting device 521 is driven by the stepper motor 314 to rotate the screw and raise the nut seat to the operating height, the telescopic device 522 extends to bring the double-headed conversion handle 525 close to the target, the empty gripper at one end of the double-headed conversion handle 525, under the control of the pneumatic valve 235, clamps the currently used test mounting handle 352 on the fixed connector 35, the pneumatic valve 235 of the pneumatic clamping frame 3511 is de-energized and exhausts air, the return spring pushes the pneumatic chuck 3512 to retract radially outward to release the snap ring 3522, the telescopic device 522 retracts to pull out the old test mounting handle 352, and the power source 524 is switched to drive... The rotating double-head conversion handle 525 aligns the spare test mounting handle 352, which is gripped from the tool slot of the circular tool holder body 513, with the fixed connector 35. The telescopic device 522 extends and inserts the spare test mounting handle 352 into the pneumatic clamping frame 3511. The pneumatic valve 235 is energized and opens, allowing compressed air to enter the inner cavity of the pneumatic clamping frame 3511 and push the pneumatic chuck 3512 to extend radially inward. The wedge-shaped surface is embedded in the conical groove of the snap-fit ​​collar 3522 to achieve snap-fit ​​locking. The gripper is released, the telescopic device 522 retracts, and the lifter 521 descends and resets. The replacement is completed. The rotation power source 512 of the rotating placement frame 51 drives the worm gear reducer to rotate the circular tool holder body 513 to rotate the next spare test mounting handle 352 to the ready position.

[0128] After all testing and aging processes are completed, the capacitor rotates with the rotating frame 311 to the unloading station. The pneumatic valve 235 of the negative pressure fixer 23 is de-energized and shuts off the negative pressure, the adsorption force disappears, and the delivery robot 12 moves to the station, extracts the end 122 to adsorb the capacitor and removes it from the placement groove 211, transferring it to the output component 13. The universal robot 121 places the capacitor on the inlet end of the output conveyor plate 132. The capacitor slides along the slide and passes through the detection areas of each second vision recognizer 133 in sequence. Each CMOS industrial camera captures an image and uses a built-in algorithm to identify whether there are defects such as bulging, leakage, and shell cracks in the capacitor's appearance, as well as whether the surface markings are clear. If any recognizer determines that the capacitor's appearance is unqualified, it outputs a signal to the control system to record that the capacitor is a defective product. After the capacitor slides into the output vibrating screen tray 131, the channel baffle in the tray is controlled by the electromagnetic driver according to the control system signal to swing in the direction of swing, guiding qualified products into the qualified product collection channel and unqualified products into the waste product collection channel, completing the sorting and output of the capacitor.

[0129] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flexible probe test fixture for aging tests of SMD aluminum electrolytic capacitors, characterized in that, include: Bottom fixing mechanism (2), the bottom fixing mechanism (2) serves as the main support body for the equipment; A circular test frame (3) is set on top of the bottom fixing mechanism (2). The circular test frame (3) consists of a rotating frame (31), a first connecting frame (32), a second connecting frame (33), a test adapter frame (34), and a fixed connector (35). The rotating frame (31) is rotatably set inside the bottom fixing mechanism (2) for rotating the test end. The first connecting frame (32), the test adapter frame (34) and the second connecting frame (33) are fixedly connected to the outer circumference of the circular test frame (3) in sequence. Several circumferentially distributed fixed joints (35) are fixedly connected to the first connecting frame (32) and the second connecting frame (33). Each fixed joint (35) is provided with a test mounting handle (352). The test mounting handle (352) located on the first connecting frame (32) and the second connecting frame (33) are respectively connected to the test end and the top joint (353). The top joint (353) presses the test end to test the capacitor. Test power mechanism (4), test power mechanism (4) is fixedly connected to bottom fixing mechanism (2), and a number of spaced telescopic cylinders (42) are installed on the top of test power mechanism (4). A pressing head (44) is installed on the output end of telescopic cylinder (42). The pressing head (44) is used to press the top connector (353). Input / output mechanism (1) is located on the side of bottom fixing mechanism (2). The input / output mechanism (1) consists of input component (11), delivery robot (12) and output component (13). Input component (11) and output component (13) are respectively located on both sides of delivery robot (12). Input / output mechanism (1) is used for extracting and placing capacitors. Replacement adapter (5) consists of a rotating placement frame (51) and a replacement component (52). Both the rotating placement frame (51) and the replacement component (52) are located inside the bottom fixing mechanism (2). The replacement component (52) is installed on one side of the rotating placement frame (51). Replacement adapter (5) is used to replace the test mounting handle (352) inside the circular test frame (3).

2. A flexible probe test fixture for aging testing of SMD aluminum electrolytic capacitors according to claim 1, characterized in that, The bottom fixing mechanism (2) consists of a fixed base (21), a negative pressure fixing device (23), and several third vision recognition devices (22); The fixed base (21) is connected to the external control box. The fixed base (21) is provided with several circumferentially distributed placement grooves (211). The inner wall of the placement groove (211) is provided with side adsorption holes (212). The bottom of the placement groove (211) is provided with bottom negative pressure holes (213). Several third vision recognition devices (22) are evenly distributed in a circle on the top of the fixed base (21), and the third vision recognition devices (22) are arranged coaxially with the placement groove (211). The negative pressure fixing device (23) is set on the outer circumferential surface of the fixed base (21). The negative pressure fixing device (23) consists of a circular pneumatic connector (231) and several sleeves (232). The circular pneumatic connector (231) is fixedly connected to the outer circumferential surface of the fixed base (21). Several pneumatic valves (235) are connected to the outer circumferential surface of the circular pneumatic connector (231). The sleeves (232) are set at the bottom of the placement groove (211) and cover the bottom negative pressure hole (213). A sealing gasket (233) is also provided at the connection between the sleeve (232) and the fixed base (21). A negative pressure connecting pipe (234) is provided between the sleeve (232) and the pneumatic valve (235).

3. A flexible probe test fixture for aging testing of SMD aluminum electrolytic capacitors according to claim 2, characterized in that, The rotating frame (31) consists of a rotating circular frame (311) and a stepper motor (314). The rotating circular frame (311) is rotatably mounted inside the fixed base (21). An external gear ring (313) is fixedly connected to the bottom of the rotating circular frame (311). The stepper motor (314) is mounted inside the fixed base (21) and is located on one side of the rotating circular frame (311). A transmission gear (315) is installed at the output end of the stepper motor (314). The transmission gear (315) meshes with the external gear ring (313). A rotating bearing seat (312) is provided on the outer circumferential surface of the rotating circular frame (311). The first connecting frame (32) consists of a first fixed frame (321) and a first pneumatic rotary joint (323). The first fixed frame (321) is fixedly connected to the outer circumferential surface of the rotating circular frame (311). The first pneumatic rotary joint (323) is installed on the first fixed frame (321). A pressing connecting frame (322) is fixedly connected to the outer circumferential surface of the first fixed frame (321). The second connecting frame (33) consists of a second fixed frame (331) and a second pneumatic rotary joint (333). The second fixed frame (331) is fixedly connected to the outer circumferential surface of the rotating circular frame (311). The second pneumatic rotary joint (333) is installed on the second fixed frame (331). A test connecting frame (332) is fixedly connected to the outer circumferential surface of the second fixed frame (331). The test adapter (34) is composed of a contact conductive slip ring (341), which is fixedly connected inside the rotating circular frame (311). Several circumferentially distributed electrical connectors (342) are provided on the outer circumferential surface of the contact conductive slip ring (341). The fixed joints (35) are circumferentially distributed and fixedly connected to the pressing connection frame (322) and the test connection frame (332).

4. A flexible probe test fixture for aging testing of SMD aluminum electrolytic capacitors according to claim 3, characterized in that, The fixed connector (35) is composed of a pneumatic clamping assembly (351); The pneumatic clamping assembly (351) consists of a pneumatic clamping frame (3511). The pneumatic clamping frame (3511) is installed on the pressing connecting frame (322) and the test connecting frame (332) in a circumferentially evenly distributed manner. At least three pneumatic clamps (3512) are slidably assembled inside the pneumatic clamping frame (3511). A pneumatic connector (3513) is installed on the top of the pneumatic clamping frame (3511). The pneumatic connector (3513) is connected to the first pneumatic rotary joint (323) and the second pneumatic rotary joint (333) through pipes. A corresponding pneumatic valve (235) is provided at the connection point. The test mounting handle (352) consists of a fixed sleeve (3521) and an inner sliding cylinder (3523). The inner sliding cylinder (3523) is slidably assembled inside the fixed sleeve (3521). Two symmetrically arranged elastic components (3524) are connected between the inner sliding cylinder (3523) and the fixed sleeve (3521). Two symmetrically arranged snap-fit ​​collars (3522) are fixedly connected to the outer circumference of the fixed sleeve (3521). The snap-fit ​​collars (3522) are snapped together with the pneumatic chuck (3512). Both ends of the inner sliding cylinder (3523) are connected to the mounting locking head (3525) by threads. A top connector (353) is fixedly connected to the top of the test mounting handle (352) located on the second connecting frame (33). The test end is fixed in the test mounting handle (352) by the mounting locking head (3525) and connected to the electrical connector (342) by a cable. The test mounting handle (352) located on the first connecting frame (32) is equipped with a presser (354). The presser (354) consists of a mounting shaft (3541) and two top pressing heads (3542). The mounting shaft (3541) is fixed inside the test mounting handle (352) by a locking mounting head (3525). The two top pressing heads (3542) are respectively fixedly connected to both ends of the mounting shaft (3541).

5. A flexible probe test fixture for aging testing of SMD aluminum electrolytic capacitors according to claim 3, characterized in that, The circular test frame (3) also includes an air blowing assembly (36), which is mounted on the bottom of the second connecting frame (33); The air blowing assembly (36) consists of an air blowing connecting frame (361) and an air blowing end (363). The air blowing connecting frame (361) is fixedly connected to the outer circumferential surface of the rotating frame (31). A third pneumatic rotary joint (362) is installed on the air blowing connecting frame (361). Several circumferentially distributed air blowing ends (363) are installed on the second connecting frame (33). The air blowing ends (363) and the third pneumatic rotary joint (362) are connected through pipes. A corresponding pneumatic valve (235) is provided at the connection.

6. A flexible probe test fixture for aging testing of SMD aluminum electrolytic capacitors according to claim 4, characterized in that, The test power mechanism (4) consists of a top guide mounting frame (41) and several telescopic cylinders (42); The top guide mounting frame (41) is connected to the fixed base (21). Several telescopic cylinders (42) are arranged at circumferential intervals on the top of the top guide mounting frame (41). Several circumferentially distributed telescopic shafts (43) are slidably assembled inside the top guide mounting frame (41). Some of the telescopic shafts (43) are installed at the output end of the telescopic cylinders (42). A pressing head (44) is fixedly connected to the bottom of the telescopic shaft (43).

7. A flexible probe test fixture for aging testing of SMD aluminum electrolytic capacitors according to claim 2, characterized in that, Multiple replacement adapters (5) are arranged evenly around the circumference inside the circular test frame (3). The rotating placement frame (51) consists of a rotating seat (511) and a circular tool holder body (513). The rotating seat (511) is fixedly connected inside the fixed base (21). A rotation power source (512) is installed on one side of the rotating seat (511). The output end of the rotating seat (511) is provided with a circular tool holder body (513). The replacement component (52) consists of a lifter (521), a telescopic device (522), and a switching body (523). The lifter (521) is installed inside the fixed base (21) and on one side of the rotating placement frame (51). The telescopic device (522) is installed on the lifter (521), and the switching body (523) is installed on the telescopic device (522). A switching power source (524) is provided at the bottom of the switching body (523), and a double-headed conversion handle (525) is installed at the output end of the switching body (523).

8. A flexible probe test fixture for aging testing of SMD aluminum electrolytic capacitors according to claim 2, characterized in that, There are multiple input / output mechanisms (1), which are evenly distributed around the circumference inside the circular test frame (3); The input component (11) consists of an input vibrating screen tray (111), which is set on one side of the circular test frame (3). An input conveying plate (112) is set on one side of the input vibrating screen tray (111), and a push rod (113) is installed on one side of the input conveying plate (112). A partition plate (114) is installed at the output end of the push rod (113).

9. A flexible probe test fixture for aging testing of SMD aluminum electrolytic capacitors according to claim 2, characterized in that, The delivery robot (12) is composed of a universal robot (121). The universal robot (121) is set on one side of the circular test frame (3). The output end of the universal robot (121) is provided with an extraction end (122), and an identification end (123) is set on one side of the extraction end (122). The recognition end (123) consists of a first visual recognizer (1231) and a lighting lamp (1232). The first visual recognizer (1231) is connected to the output end of the universal robot (121), and the lighting lamp (1232) is set on the first visual recognizer (1231). The extraction end (122) is composed of a negative pressure pipeline (1211), which is connected to the output end of the universal manipulator (121). A displacement measuring end (1223) is installed at one end of the negative pressure pipeline (1211), and a negative pressure adsorption end (1222) is installed at the other end of the displacement measuring end (1223).

10. A flexible probe test fixture for aging testing of SMD aluminum electrolytic capacitors according to claim 2, characterized in that, The output component (13) consists of an output vibrating screen tray (131), an output conveying plate (132) is provided on one side of the output vibrating screen tray (131), and several equally spaced second vision recognition devices (133) are provided on the top of the output conveying plate (132).

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