Device for assisting copper foil in online verification of CCD (Charge Coupled Device) detection precision

Abstract

The utility model belongs to the technical field of copper foil detection, and discloses a device for assisting online verification of CCD detection precision of copper foil, which is arranged at a copper foil rewinding device and comprises a mounting bracket, and a first guide roller, a second guide roller, a third guide roller, a fourth guide roller and a fifth guide roller are sequentially arranged on the mounting bracket in a descending manner. The first guide roller is driven by a magnetic powder brake, CCD cameras are further arranged on the upper side and the lower side of the installation support respectively, the CCD camera located on the upper side shoots the upper surface of the copper foil conveyed through the second guide roller, the third guide roller and the fourth guide roller, and the CCD camera located on the lower side aligns to the lower surface of the copper foil conveyed through the third guide roller, the fourth guide roller and the fifth guide roller. And identifying copper foil surface defects. The device can regularly carry out online CCD detection precision verification under the condition that the angle and the position of the copper foil are not changed.

Description

Technical Field

[0001] This utility model belongs to the field of copper foil testing technology, specifically relating to a device for assisting in online verification of CCD testing accuracy of copper foil. Background Technology

[0002] Copper foil is an extremely thin (5μm~100μm) high-end conductive material, mainly used in copper-clad laminates (CCL) and printed circuit boards (PCBs). It is also an important material for lithium-ion battery anode material carriers and current collectors. Its unique physical and chemical properties make it an indispensable material in modern industry, especially the electronics industry. When defects such as residual copper and pinholes appear on the surface of copper foil, they will have a significant impact on conductivity, and may even lead to short circuits or open circuits. Therefore, the industry has very high requirements for the accuracy of copper foil surface defect detection, and online CCD inspection is commonly used for copper foil inspection.

[0003] Online CCD inspection of copper foil is an AI-powered visual inspection machine that uses database modeling to analyze and classify defects. However, in existing technologies, the accuracy of inspection may vary between different CCD machines or even within a single CCD machine due to time differences. Furthermore, CCD camera inspection has extremely strict requirements for inspection angle and focal length; even slight deviations can lead to changes in inspection accuracy.

[0004] Therefore, there is an urgent need for a device to assist in the online verification of CCD detection accuracy on copper foil, and to periodically perform online CCD detection accuracy calibration. Utility Model Content

[0005] To address the issue of periodic calibration and capability verification of online CCD cameras, this invention provides a device for assisting in online verification of CCD detection accuracy using copper foil. This device allows for the selection of any copper foil standard sample, enabling periodic online CCD detection accuracy verification without altering the angle and position of the copper foil.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A device for assisting in online verification of CCD detection accuracy of copper foil is installed at a copper foil rewinding device. It includes a mounting bracket on which a first guide roller, a second guide roller, a third guide roller, a fourth guide roller, and a fifth guide roller are sequentially arranged in descending order. The first guide roller is driven by a magnetic powder brake. CCD cameras are also installed on the upper and lower sides of the mounting bracket. The upper CCD camera captures the upper surface of the copper foil transported by the second, third, and fourth guide rollers, while the lower CCD camera is aligned with the lower surface of the copper foil transported by the third, fourth, and fifth guide rollers to identify surface defects on the copper foil.

[0008] Furthermore, the mounting bracket is provided with a master roll mounting seat, the first guide roller is mounted on the master roll mounting seat, and a pair of support lug bases for placing copper foil master rolls are provided at both ends of the master roll mounting seat above the position of the first guide roller.

[0009] Furthermore, the first guide roller is an air-expanded shaft, and a pressure regulating valve is installed on the air-expanded shaft to adjust the adsorption force on the air-expanded shaft.

[0010] Furthermore, the CCD camera is mounted on a mounting bracket via a lens mount.

[0011] Furthermore, the lens mount is provided with an adjustment hole for adjusting the angle of the CCD camera.

[0012] Furthermore, the mounting bracket is also equipped with a tension control cabinet, which is connected to the first guide roller via a pneumatic valve. The pressure is displayed on an electronic screen in real time, and the pressure can be adjusted via buttons.

[0013] Furthermore, a motor bracket is provided on one side of the master roll mounting base for mounting a magnetic powder brake.

[0014] Furthermore, a light source is provided above the third guide roller, and light sources are provided below the third and fourth guide rollers, respectively, to illuminate the upper and lower surfaces of the copper foil.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention provides a device for assisting in online verification of CCD detection accuracy of copper foil. It allows for the selection of any copper foil standard sample and enables periodic online CCD detection accuracy calibration without changing the angle and position of the copper foil, ensuring that the CCD detection accuracy meets the requirements and that product quality meets standards and customer requirements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a partial detail drawing of the present invention.

[0019] Figure 3 This is a detailed installation diagram of the upper CCD camera of this utility model.

[0020] Figure 4 This is a detailed installation diagram of the lower CCD camera of this utility model.

[0021] in:

[0022] 1. First bracket; 1-1. Mother roll mounting base; 1-1-1. Support lug base; 1-1-2. Motor bracket;

[0023] 2. Second support;

[0024] 3. Copper foil master roll;

[0025] 4. First guide roller;

[0026] 5. Second guide roller;

[0027] 6. Third guide roller;

[0028] 7. Fourth guide roller;

[0029] 8. Fifth guide roller;

[0030] 9. Magnetic powder brake;

[0031] 10. Pressure regulating valve;

[0032] 11. CCD camera;

[0033] 12. Lens mount; 12-1. Adjustment hole;

[0034] 13. Tension control cabinet. Detailed Implementation

[0035] The specific embodiments of this utility model will be further explained below with reference to the accompanying drawings.

[0036] like Figures 1-4 As shown, this is a device for assisting in online verification of CCD detection accuracy of copper foil. It is installed on a copper foil rewinding device. The preceding process is the raw foil process, which produces semi-finished copper foil. This process is the copper foil processing process, which processes and manufactures the semi-finished copper foil to form finished copper foil. In this process, defect detection of the copper foil is required. The finished copper foil that passes the inspection is sent to the slitting and packaging process of the slitting and packaging machine to slit and package the finished copper foil.

[0037] A copper foil online verification CCD accuracy testing device includes a mounting bracket, a magnetic powder brake 9, a CCD camera 11, a first guide roller 4, a second guide roller 5, a third guide roller 6, a fourth guide roller 7, a fifth guide roller 8, a pressure regulating valve 10, and a tension control cabinet 13.

[0038] The base support, which serves as the support for the entire device, includes a first base support 1 and a second base support 2 arranged adjacent to each other.

[0039] The top of the first base bracket 1 is provided with a master roll mounting seat 1-1 for mounting copper foil master rolls. The master roll mounting seat 1-1 is provided with a first guide roller 4. A pair of openable support lugs 1-1-1 are provided at both ends above the first guide roller 4 to facilitate support and replacement of copper foil master rolls 3. A motor bracket 1-1-2 is provided on one side of the master roll mounting seat 1-1 for mounting magnetic powder brake 9.

[0040] The magnetic powder brake 9 is connected to the first guide roller 4 and acts as the active roller, driving the first guide roller 4 to rotate. The first guide roller 4, as the active roller, adopts an air expansion shaft. A pressure regulating valve 10 is installed on the air expansion shaft to adjust the adsorption force on the air expansion shaft. Before the pressure is adjusted, the copper foil cannot be adsorbed on the air expansion shaft and is in a loose state. After the adsorption pressure is increased, the copper foil is firmly adsorbed on the air expansion shaft. The copper foil has tension, which can realize the transmission operation.

[0041] The advantage of using an air shaft instead of other adsorption systems here is that, since the overhead crane in the workshop is limited at the rewinding device in the previous process and cannot lift the roller, the copper foil can only be moved and rewound manually. Due to weight limitations, only 200m to 300m of copper foil can be rewound. The subsequent slitting process needs to be carried out on the slitting machine. Since only air shafts can be used to wind the foil on the slitting machine, it is the most convenient to use an air shaft here.

[0042] The second base support 2 is provided with a second guide roller 5, a third guide roller 6, a fourth guide roller 7, and a fifth guide roller 8 that descend sequentially, all of which serve as driven rollers. The copper foil on the copper foil master roll 3 is sequentially transported to the winding end via the second guide roller 5, the third guide roller 6, the fourth guide roller 7, and the fifth guide roller 8.

[0043] Two sets of CCD cameras 11 are mounted on the second base bracket 2, respectively positioned on the upper and lower sides of the second base bracket 2 via lens mounting seats 12. The CCD camera on the upper side is aimed at the upper surface of the copper foil being transported on the second guide roller 5, the third guide roller 6, and the fourth guide roller 7, while the CCD camera on the lower side is aimed at the lower surface of the copper foil being transported on the third guide roller 6, the fourth guide roller 7, and the fifth guide roller 8, to identify surface defects of the copper foil. Each set includes multiple CCD cameras, which are powered by a 24V power supply and connected to an image acquisition card via a network cable. They are controlled by a CCD industrial control computer, and their number can be set according to actual needs. The lens mounting seat 12 is provided with an adjustment hole 12-1 for adjusting the angle of the CCD camera 11. Once the installation and debugging are completed, no further adjustment is needed. If the CCD detection accuracy decreases, the camera angle can be fine-tuned again to improve the detection accuracy.

[0044] To improve the clarity of the image, a light source 14, such as a lamp, is installed above the third guide roller 6 at the front and rear positions to illuminate the upper surface of the copper foil. At the same time, a light source 14, such as a lamp, is installed below the third guide roller 6 and the fourth guide roller 7 to illuminate the lower surface of the copper foil.

[0045] In addition, it is equipped with a computer to view the defects detected by the camera in real time and mark and record them for easy review in subsequent processes.

[0046] The advantage of this setup is that, since CCD camera detection has extremely strict requirements on the detection angle and focal length, even a slight deviation can lead to changes in detection accuracy. Therefore, by setting up an angle-adjustable CCD camera, online CCD detection accuracy can be checked periodically without changing the angle and position of the copper foil. At the same time, it reduces or minimizes the detection accuracy deviation that may occur between different CCD machines or between individual CCD machines due to time differences.

[0047] In addition, a tension control cabinet 13 is also provided on the first base bracket 1, which is connected to the first guide roller through a pneumatic valve. The electronic screen displays the pressure in real time, and the pressure can be adjusted by buttons.

[0048] The working process of the above-mentioned device is as follows: This invention utilizes an added verification device to realize the transmission of copper foil standard samples and verify the effectiveness of CCD calibration accuracy. Its working process is as follows:

[0049] 1. Place a standard copper foil sample on the master roll mounting base 1-1;

[0050] 2. By adjusting the pressure valve, the adsorption pressure of the first guide roller is increased, so that the copper foil standard sample changes from a loose state to a state of being firmly adsorbed on the first guide roller;

[0051] 3. The copper foil standard sample is manually pulled and passed through the second guide roller 5, the third guide roller 6, the fourth guide roller 7, and the fifth guide roller 8 in sequence, and then pasted onto the take-up shaft of the next process (not shown in the figure), forming a copper foil standard sample transfer structure from guide roller → CCD camera → take-up shaft.

[0052] 4. Turn on the power to the tension control cabinet, adjust the pressure, and drive the guide roller to rotate through the motor so that the copper sample passes through the upper and lower surface lenses of the CCD in sequence, simulating the CCD detection state during normal production, ensuring the speed during normal production, and ensuring that the CCD camera reads the copper foil surface defects at a normal frequency.

[0053] 5. The copper foil standard sample is initially transported by guide rollers, first passing through the upper CCD camera for inspection, then through the lower CCD camera for inspection, and finally wound onto the take-up shaft. Simultaneously, the CCD camera detects defects on the upper and lower surfaces of the copper foil standard sample and transmits the data to the image acquisition card via a network cable. The acquisition card inputs the data into the computer host, and the computer host's detection software outputs the detected defects. The CCD defect detection data of the copper foil standard sample detected at different times and on different machines are compared. If the detected defect location, size, and type are completely consistent, it is determined that the CCD detection accuracy of that machine remains unchanged. If they are inconsistent, it is determined that the accuracy is abnormal and adjustments are made to ultimately complete the rewinding verification process.

[0054] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the 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. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for assisting in online verification of CCD detection accuracy of copper foil, installed at the copper foil rewinding device, characterized in that, The system includes a mounting bracket on which a first guide roller (4), a second guide roller (5), a third guide roller (6), a fourth guide roller (7), and a fifth guide roller (8) are arranged sequentially at a decreasing height. The first guide roller (4) is driven by a magnetic powder brake. CCD cameras (11) are also provided on the upper and lower sides of the mounting bracket. The CCD camera (11) on the upper side takes pictures of the upper surface of the copper foil that is transported by the second guide roller (5), the third guide roller (6), and the fourth guide roller (7), while the CCD camera on the lower side is aligned with the lower surface of the copper foil that is transported by the third guide roller (6), the fourth guide roller (7), and the fifth guide roller (8) to identify defects on the surface of the copper foil.

2. The device for assisting in online verification of CCD detection accuracy of copper foil according to claim 1, characterized in that, The mounting bracket is provided with a master roll mounting seat (1-1), and the first guide roller (4) is mounted on the master roll mounting seat (1-1). At both ends of the master roll mounting seat (1-1) above the first guide roller (4), a pair of support lug bases (1-1-1) for placing copper foil master rolls are provided.

3. The device for assisting in online verification of CCD detection accuracy of copper foil according to claim 1, characterized in that, The first guide roller (4) adopts an air shaft, and a pressure regulating valve (10) is installed on the air shaft to adjust the adsorption force on the air shaft.

4. The device for assisting in online verification of CCD detection accuracy using copper foil according to claim 1, characterized in that, The CCD camera (11) is mounted on a mounting bracket via a lens mount (12).

5. The device for assisting in online verification of CCD detection accuracy of copper foil according to claim 4, characterized in that, The lens mount (12) is provided with an adjustment hole (12-1) for adjusting the angle of the CCD camera (11).

6. The device for assisting in online verification of CCD detection accuracy using copper foil according to claim 1, characterized in that, The mounting bracket is also equipped with a tension control cabinet (13), which is connected to the first guide roller through a pneumatic valve. The electronic screen displays the pressure in real time, and the pressure can be adjusted by pressing a button.

7. The device for assisting in online verification of CCD detection accuracy of copper foil according to claim 2, characterized in that, A motor bracket (1-1-2) is provided on one side of the master roll mounting base (1-1) for mounting the magnetic powder brake (9).

8. The device for assisting in online verification of CCD detection accuracy of copper foil according to claim 1, characterized in that, A light source (14) is provided above the third guide roller (6), and a light source (14) is provided below the third guide roller (6) and the fourth guide roller (7), respectively, to illuminate the upper and lower surfaces of the copper foil.

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