An apparatus for ultrasonic testing of surface defects of a punched anode foil

Abstract

The utility model discloses an anode etching foil perforation surface defect ultrasonic detection device relates to anode etching foil quality detection technical field, including detection platform and transmission shaft, the bearing in -side wall of detection platform is connected with the conveying roller, and the top left side of detection platform is installed with the support, be provided with between two supports support no.

Description

Technical Field

[0001] This utility model relates to the field of quality inspection technology for anodic corrosion foil, specifically to an ultrasonic testing device for perforated surface defects in anodic corrosion foil. Background Technology

[0002] Anodized foil is a core raw material for aluminum electrolytic capacitors. Its surface undergoes electrochemical corrosion to form a porous structure, which increases the electrode's specific surface area and ensures the capacitor's energy storage and withstand voltage performance. Defects such as perforations and pinholes during the corrosion process directly lead to increased leakage current, decreased withstand voltage, and even product failure, affecting the stable operation of electronic equipment. To prevent substandard foil from entering production, it needs to be inspected using an ultrasonic testing device.

[0003] Existing ultrasonic testing equipment suffers from poor adaptability of the conveyor structure. When testing narrow foil, the width of the conveyor roller is too large to limit the movement, and the foil is prone to shift along the width direction, resulting in misalignment of the ultrasonic probe detection area and an increased false negative rate.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and proposed an ultrasonic detection device for perforated surface defects of anodic corrosion foil. Utility Model Content

[0005] The purpose of this invention is to provide an ultrasonic testing device for perforated surface defects in anodic corrosion foil, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an ultrasonic testing device for perforated surface defects of anodic corrosion foil, comprising a testing table and a drive shaft. A conveying roller is connected to the bearing inside the inner wall of the testing table, and a support is installed on the top left side of the testing table. A bracket is provided between the two supports, and a servo motor is installed above the front end of the bracket. The output end of the servo motor is connected to a bidirectional lead screw, and a lead screw nut is connected to the outside of the bidirectional lead screw. A connecting block is connected to the outside of the lead screw nut, and a bracket is fixed to the right end of the connecting block. A drive motor is installed on the top left side of the bracket, and a drive shaft is connected to the output end of the drive motor. A synchronous pulley is sleeved on the outside of the drive shaft, and a synchronous pulley is connected to the outside of the synchronous pulley via a synchronous belt. The drive shaft passes through the middle of the synchronous pulley, and a conveying wheel is connected to the bearing through the bottom through hole of the bracket. A distance measuring sensor is installed on the left side of the front end of the bracket at the rear.

[0007] Furthermore, the second bracket is symmetrically distributed about the transverse central axis of the first bracket, and the first bracket and the second bracket are perpendicular to each other.

[0008] Furthermore, the drive shafts are equidistantly distributed along the length of the second support, and the ratio of the number of drive shafts, transmission shafts and conveyor wheels is 1:6:7.

[0009] Furthermore, the conveying rollers are equidistantly distributed along the length of the testing table, and the conveying rollers and the conveying wheel are perpendicular to each other.

[0010] Furthermore, the ranging sensor is electrically connected to a PLC controller, and the PLC controller is electrically connected to the servo motor and the drive motor respectively.

[0011] Furthermore, a support bracket three is provided on the top right side of the testing platform, and a touch screen display is installed on the outside of the support bracket three. A cylinder is installed at the top inside the support bracket three, and a mounting plate is provided at the output end of the cylinder.

[0012] Furthermore, a high-frequency ultrasonic probe and a second ranging sensor are respectively installed at the bottom of the mounting plate, and a coupling agent tank is installed at the rear end of the bracket three. A water pump is installed at the output end of the coupling agent tank, and an atomizing nozzle is connected to the output end of the water pump through a pipeline.

[0013] Furthermore, the PLC controller is electrically connected to the touch screen, cylinder, high-frequency ultrasonic probe, distance sensor II, and water pump, and two high-frequency ultrasonic probes are provided.

[0014] This invention provides an ultrasonic testing device for surface defects of perforated anodic corrosion foil, which has the following advantages:

[0015] 1. This utility model uses a servo motor to drive a bidirectional lead screw, and the lead screw nut and connecting block drive the bracket two to achieve spacing adjustment, which can be adapted to foils of different widths. By using the conveying wheel to fit with the edge of the foil to form a limit, it can reduce the offset in the width direction of the foil and the misalignment rate of the ultrasonic probe detection area, and ensure accurate identification of perforation defects in narrow foils.

[0016] 2. This utility model uses a PLC controller to synchronously link a cylinder, a high-frequency ultrasonic probe, a distance sensor, and a water pump. After the foil enters the detection area, it can automatically complete the spacing detection, high-frequency ultrasonic probe lowering, coupling agent spraying, and ultrasonic detection process without manual intervention. Operators only need to monitor the touch screen, which reduces labor intensity and greatly shortens the time spent on the detection process. Attached Figure Description

[0017] Figure 1 This is a top view schematic diagram of the ultrasonic detection device for perforated surface defects of anodic corrosion foil according to the present invention;

[0018] Figure 2 This is a top view cross-sectional structural diagram of bracket one and bracket two of the ultrasonic testing device for perforated surface defects of anodic corrosion foil according to the present invention;

[0019] Figure 3 This is a schematic diagram of the three-sided structure of the testing table and support of the ultrasonic testing device for perforated surface defects of anodic corrosion foil according to the present invention;

[0020] Figure 4 This is a three-dimensional structural diagram of the testing table and support of an ultrasonic testing device for perforated surface defects of anodic corrosion foil according to the present invention.

[0021] In the diagram: 1. Testing platform; 2. Conveyor roller; 3. Support; 4. Bracket 1; 5. Servo motor; 6. Bidirectional lead screw; 7. Lead screw nut; 8. Connecting block; 9. Bracket 2; 10. Drive motor; 11. Drive shaft; 12. Synchronous pulley 1; 13. Synchronous belt; 14. Synchronous pulley 2; 15. Transmission shaft; 16. Conveyor wheel; 17. Distance sensor 1; 18. Bracket 3; 19. Touch screen; 20. Cylinder; 21. Mounting plate; 22. High-frequency ultrasonic probe; 23. Distance sensor 2; 24. Coupling agent storage tank; 25. Water pump; 26. Pipeline; 27. Atomizing nozzle. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] like Figure 1 , Figure 2 and Figure 4As shown, an ultrasonic testing device for perforated surface defects in anodic corrosion foil includes a testing platform 1 and a drive shaft 15. A conveying roller 2 is connected to a bearing on the inner wall of the testing platform 1. A support 3 is installed on the top left side of the testing platform 1. A bracket 4 is positioned between the two supports 3. A servo motor 5 is installed above the front end of the bracket 4. A bidirectional lead screw 6 is connected to the output end of the servo motor 5. A lead screw nut 7 is connected to the outside of the bidirectional lead screw 6. A connecting block 8 is connected to the outside of the lead screw nut 7. A bracket 9 is fixed to the right end of the connecting block 8. A drive motor 10 is installed on the top left side of the bracket 9. A drive shaft 11 is connected to the output end of the drive motor 10. A synchronous pulley 12 is sleeved on the outside of the drive shaft 11. The outside of the synchronous pulley 12 is connected to a synchronous belt 13. Synchronous pulley 2 14, drive shaft 15 passes through the middle of synchronous pulley 2 14, and the bottom end of drive shaft 15 passes through the bearing at the bottom through hole of bracket 2 9 and is connected to conveyor wheel 16. A distance sensor 17 is installed on the left side of the front end of bracket 2 9 at the rear. Bracket 2 9 is symmetrically distributed about the transverse central axis of bracket 1 4, and bracket 1 4 and bracket 2 9 are perpendicular to each other. Drive shaft 15 is equidistantly distributed along the length direction of bracket 2 9, and the ratio of the number of drive shaft 11, drive shaft 15 and conveyor wheel 16 is 1:6:7. Conveyor roller 2 is equidistantly distributed along the length direction of detection table 1, and conveyor roller 2 and conveyor wheel 16 are perpendicular to each other. Distance sensor 17 is electrically connected to PLC controller, and PLC controller is electrically connected to servo motor 5 and drive motor 10 respectively.

[0024] The specific operation is as follows: the servo motor 5 drives the bidirectional lead screw 6, the lead screw nut 7 and the connecting block 8 drive the bracket 9 to achieve spacing adjustment, which can adapt to foils of different widths. The conveying wheel 16 fits with the edge of the foil to form a limit, which can reduce the offset in the width direction of the foil and the misalignment rate of the ultrasonic probe detection area, and ensure accurate identification of narrow foil perforation defects.

[0025] like Figure 1 , Figure 3 and Figure 4 As shown, a bracket 18 is installed on the top right side of the testing platform 1, and a touch screen 19 is installed on the outside of the bracket 18. A cylinder 20 is installed at the top inside the bracket 18, and a mounting plate 21 is installed at the output end of the cylinder 20. A high-frequency ultrasonic probe 22 and a distance sensor 23 are installed at the bottom of the mounting plate 21. A coupling agent tank 24 is installed at the rear end of the bracket 18, and a water pump 25 is installed at the output end of the coupling agent tank 24. The output end of the water pump 25 is connected to an atomizing nozzle 27 through a pipe 26. The PLC controller is electrically connected to the touch screen 19, the cylinder 20, the high-frequency ultrasonic probe 22, the distance sensor 23, and the water pump 25. There are two high-frequency ultrasonic probes 22.

[0026] The specific operation is as follows: the PLC controller synchronously links the cylinder 20, the high-frequency ultrasonic probe 22, the distance sensor 23, and the water pump 25. After the foil enters the detection area, it can automatically complete the spacing detection, the downward movement of the high-frequency ultrasonic probe 22, the spraying of the coupling agent, and the ultrasonic detection process without manual intervention. The operator only needs to monitor the touch screen 19, which reduces labor intensity and greatly shortens the time spent on the detection process.

[0027] In summary, when using this ultrasonic testing device for perforated surface defects of anodized foil, the anodized foil is first placed on the conveyor roller 2. Then, the PLC controller starts the servo motor 5. The output of the servo motor 5 drives the bidirectional lead screw 6 to rotate, causing the two sets of lead screw nuts 7 to move towards each other along the bidirectional lead screw 6. Through the connecting block 8, the bracket 2 9 moves towards each other. During this process, the distance sensor 17 located at the front end of the rear bracket 2 9 measures the distance between itself and the other side bracket 2 9 in real time and continuously transmits the data to the PLC controller. When the measured distance matches the width parameter of the anodized foil, the controller issues a command to shut down the servo motor 5. At this time, the conveyor wheel 16 at the bottom of the bracket 2 9 is in close contact with the edge of the foil, completing the precise limit in the width direction of the narrow foil and preventing deviation in the width direction during conveying.

[0028] After the limit adjustment is completed, the PLC controller starts two sets of drive motors 10. The output of drive motor 10 drives drive shaft 11 to rotate, causing synchronous pulley 12 to rotate. Synchronous pulley 12 is linked to synchronous pulley 14 through synchronous belt 13, which in turn drives drive shaft 15 to rotate synchronously, and finally causes conveyor wheel 16 at the bottom of drive shaft 15 to rotate, driving foil material to be smoothly conveyed to the right.

[0029] When the foil is transported to the detection area on the top right side of the detection table 1, the PLC controller starts the water pump 25, which transports the water-soluble coupling agent in the coupling agent storage tank 24 to the atomizing nozzle 27 through the pipeline 26. The atomizing nozzle 27 sprays the coupling agent evenly onto the surface of the anodic corrosion foil to ensure effective transmission of the ultrasonic signal. Then, the PLC controller starts the cylinder 20. The output end of the cylinder 20 pushes the mounting plate 21 down. The distance sensor 23 detects the distance between itself and the foil surface in real time and feeds it back to the PLC controller. The two high-frequency ultrasonic probes 22 are adjusted to the optimal detection distance. Then, the high-frequency ultrasonic probes 22 emit high-frequency ultrasonic signals of 10-20MHz. The signal is transmitted to the surface of the anodic corrosion foil through the water-soluble coupling agent. If there is a perforation defect in the foil, the ultrasonic signal will be reflected and attenuated at the defect, resulting in a change in the signal amplitude. The changed signal is received by the probe and transmitted to the PLC controller. After being converted into a digital waveform, it is compared with the preset defect threshold. When the amplitude is lower than the threshold, it is determined to be a defect.

[0030] During the testing process, the detection data from the high-frequency ultrasonic probe 22 and the real-time parameters of each sensor are simultaneously displayed on the touch screen 19, facilitating monitoring by the operator. The PLC controller continuously receives feedback data from the first ranging sensor 17 and the second ranging sensor 23, and dynamically fine-tunes the limit distance of the servo motor 5 and the probe height of the cylinder 20 to ensure the accuracy of the entire testing process.

[0031] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An ultrasonic testing device for surface defects of perforated anodic corrosion foil, comprising a testing table (1) and a drive shaft (15), characterized in that, The inner wall of the testing platform (1) is connected to a bearing with a conveying roller (2), and a support (3) is installed on the top left side of the testing platform (1). A bracket (4) is provided between the two supports (3), and a servo motor (5) is installed above the front end of the bracket (4). The output end of the servo motor (5) is connected to a bidirectional lead screw (6), and a lead screw nut (7) is connected to the outside of the bidirectional lead screw (6). A connecting block (8) is connected to the outside of the lead screw nut (7), and a bracket (9) is fixed to the right end of the connecting block (8). The top left of the bracket (9) is... A drive motor (10) is installed on the side, and the output end of the drive motor (10) is connected to a drive shaft (11). A synchronous pulley (12) is sleeved on the outside of the drive shaft (11), and a synchronous pulley (14) is connected to the outside of the synchronous pulley (12) via a synchronous belt (13). The transmission shaft (15) passes through the middle of the synchronous pulley (14), and the bottom end of the transmission shaft (15) passes through the bearing at the bottom through hole of the bracket (9) and is connected to a conveyor wheel (16). A distance sensor (17) is installed on the left side of the front end of the bracket (9) at the rear.

2. The ultrasonic testing device for perforated surface defects of anodic corrosion foil according to claim 1, characterized in that, The second bracket (9) is symmetrically distributed about the transverse central axis of the first bracket (4), and the first bracket (4) and the second bracket (9) are perpendicular to each other.

3. The ultrasonic testing device for perforated surface defects of anodic corrosion foil according to claim 1, characterized in that, The drive shafts (15) are equidistantly distributed along the length of the second bracket (9), and the ratio of the number of drive shafts (11), drive shafts (15) and conveyor wheels (16) is 1:6:

7.

4. The ultrasonic testing device for perforated surface defects of anodic corrosion foil according to claim 1, characterized in that, The conveying rollers (2) are equidistantly distributed along the length of the detection table (1), and the conveying rollers (2) and the conveying wheel (16) are perpendicular to each other.

5. The ultrasonic testing device for perforated surface defects of anodic corrosion foil according to claim 1, characterized in that, The ranging sensor (17) is electrically connected to a PLC controller, and the PLC controller is electrically connected to the servo motor (5) and the drive motor (10) respectively.

6. The ultrasonic testing device for perforated surface defects of anodic corrosion foil according to claim 5, characterized in that, The top right side of the testing platform (1) is provided with a bracket three (18), and a touch screen display (19) is installed on the outside of the bracket three (18). A cylinder (20) is installed at the top inside the bracket three (18), and a mounting plate (21) is provided at the output end of the cylinder (20).

7. The ultrasonic testing device for perforated surface defects of anodic corrosion foil according to claim 6, characterized in that, The bottom of the mounting plate (21) is equipped with a high-frequency ultrasonic probe (22) and a second ranging sensor (23). The rear end of the bracket (18) is equipped with a coupling agent tank (24), and the output end of the coupling agent tank (24) is equipped with a water pump (25). The output end of the water pump (25) is connected to an atomizing nozzle (27) through a pipeline (26).

8. The ultrasonic testing device for perforated surface defects of anodic corrosion foil according to claim 7, characterized in that, The PLC controller is electrically connected to the touch screen (19), cylinder (20), high-frequency ultrasonic probe (22), distance sensor II (23) and water pump (25), and there are two high-frequency ultrasonic probes (22).

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