Device for detecting aluminum foil coating defect outside electric wire on braiding machine
By embedding multiple diffuse reflection photoelectric sensors inside the mold on the braiding machine, the problem of difficult detection of aluminum foil wrapping defects was solved, enabling real-time and accurate defect detection and improving product quality and production efficiency.
Patent Information
- Application Number
- CN202520296353.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing braiding machines have difficulty detecting defects in real time during the aluminum foil wrapping process, which may lead to the failure of the shielding layer of the produced data cable. The detection effect is poor and time-consuming, and it is impossible to accurately locate the defect.
Multiple diffuse reflection photoelectric sensors are embedded in the upper mold of the braiding machine and detected through guide holes. The sensors are distributed at different heights and angles to detect the aluminum foil covering condition, avoiding light interference and improving detection accuracy.
It enables real-time detection of aluminum foil coating, reducing defective products, improving product quality, shortening detection time, and increasing detection accuracy.
Smart Images
Figure CN223664495U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of braiding machine technology, and in particular to a detection device for defects in the outer aluminum foil wrapping of wires on a braiding machine. Background Technology
[0002] High-speed braiding machines are commonly used braiding equipment for electrical wires. They mainly wrap aluminum foil around the surface of the wire and then use braiding copper wire, aluminum wire, or other metal wires to weave fine metal filaments onto the surface of the wire to form a braided layer.
[0003] This type of braiding machine uses a mold to wrap aluminum foil and aluminum wire into a complete wire. It feeds from the bottom and then extends from the top to wind the wrapping layer, finally forming the wire.
[0004] The die at the bottom of the braiding machine that restricts the feed is called the lower eyelet die. Its function is to pre-form the aluminum foil, making it easier to wrap around the surface of the wire. Lower eyelet dies come in various sizes and need to be locked onto the mounting plate at the bottom of the braiding machine. Both the wire and the aluminum foil are fed in and guided through the lower eyelet die. Above the lower eyelet die is the upper eyelet die, which is the output end where the wire is partially wrapped, and it completely covers the wire with aluminum foil. Above the lower eyelet die is the braiding die, around which the aluminum wire needs to be rotated and wound to form both the wire and the aluminum foil.
[0005] The wires need to be covered with an aluminum foil shielding layer to increase their anti-interference ability. The wire covering process is relatively fast, and the wire travel speed also needs to be faster to improve production efficiency.
[0006] Currently, aluminum foil is wrapped around the wire using a braiding machine mold. The aluminum foil deforms as it passes through the mold, thus wrapping the wire. However, defects such as incomplete wrapping, wrinkles, or tears frequently occur during the wrapping process. The wrapping process only involves the aluminum foil passing through a closed lower and upper mold, with a travel distance as short as 5-10cm. This fully enclosed operation makes it difficult to observe the wrapping effect. Once the wrapped aluminum foil extends beyond the upper mold, it is obscured by the braided aluminum wire layer, making it difficult to inspect the foil layer. Currently, there is no equipment to inspect the aluminum foil wrapping effect of the wire; it can only be directly braided. After the product is completed, data is tested. If the aluminum foil wrapping is substandard, the test will cause the data cable shielding layer to fail, resulting in high-frequency defects in the produced data cable, producing high-frequency spikes. Furthermore, during data testing, it is impossible to determine which section or sections of the wire have abnormal aluminum foil wrapping, leading to difficult, time-consuming, and ineffective quality inspection, resulting in a large amount of scrap.
[0007] Based on this, this utility model designs a detection device for defects in the outer aluminum foil wrapping of wires on a braiding machine, in order to solve the above-mentioned problems. Utility Model Content
[0008] The purpose of this invention is to provide a detection device for defects in the outer aluminum foil wrapping of wires on a braiding machine. This device directly hides and installs sensors inside the upper mold, and multiple sensors directly monitor the inside of the guide holes of the mold, thereby enabling direct detection inside the upper mold. It can effectively detect the wrapping condition of the aluminum foil of the wire during movement. Furthermore, the addition of multiple sensors to detect from different angles and heights avoids light interference between sensors, resulting in excellent detection effect, small space occupation, and fast detection speed.
[0009] This utility model is implemented as follows: a detection device for defects in the outer aluminum foil wrapping of wires on a braiding machine, comprising:
[0010] Upper mold and sensor;
[0011] The upper mold is a mold covered with aluminum foil. The upper mold has a circular tube structure with guide holes inside, and the guide holes penetrate vertically through the upper and lower ends of the upper mold.
[0012] The sensor has a cylindrical structure, and multiple sensors are fitted and inserted into the inner wall of the guide hole; the data line of the sensor extends out of the upper mold.
[0013] The sensor's detection end faces the axis of the guide hole, and the sensor is embedded in the inner wall of the guide hole;
[0014] Multiple sensors are evenly spaced in a spiral pattern on the inner wall of the guide hole;
[0015] Each of the sensors is located at a different height.
[0016] Furthermore, the sensor is a diffuse reflection photoelectric sensor.
[0017] Furthermore, the spacing height d between each of the sensors is the same, and the height d is between 5 and 12 mm.
[0018] Furthermore, the number of sensors is four, and the lateral spacing angle α between each sensor is 90°.
[0019] The beneficial effects of this utility model are: 1. This device adds a sensor, and each sensor has a different height position, and the detection arc covered by each sensor in the horizontal direction is evenly distributed, so that it can surround the outside of the wire and detect the wrapping of the entire aluminum foil.
[0020] 2. This device designs multiple sensors at different heights, which can avoid mutual interference between sensors and effectively improve the detection accuracy of aluminum foil wrapping. This allows the device to effectively perform full inspection of the wire within a short travel distance. Attached Figure Description
[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0023] Figure 2 This is a schematic diagram of the guide hole in the upper mold of this utility model in its unfolded state.
[0024] Figure 3 This is a schematic diagram of the internal structure of the cross-section of the upper mold of this utility model.
[0025] The attached diagram lists the components represented by each number as follows:
[0026] 1-Upper mold, 11-Guide hole, 2-Sensor, 3-Mounting plate, 31-Lower mold. Detailed Implementation
[0027] Please see Figures 1 to 3 As shown, this utility model provides a detection device for defects in the outer aluminum foil wrapping of wires on a braiding machine. To better understand the above technical solution, the following will describe the above technical solution in detail with reference to the accompanying drawings and specific embodiments.
[0028] In a specific embodiment of the technical solution of this utility model:
[0029] Includes upper mold 1 and sensor 2;
[0030] The upper mold 1 is a mold covered with aluminum foil. The upper mold 1 has a cylindrical structure with a guide hole 11 inside. The guide hole 11 vertically penetrates the upper and lower ends of the upper mold 1. The sensor 2 is a cylindrical structure. Multiple sensors 2 are embedded and inserted into the inner wall of the guide hole 11. The data line of the sensor 2 extends out of the upper mold 1. The sensor 2 is a diffuse reflection photoelectric sensor.
[0031] When the diffuse reflection photoelectric sensor detects a wire, if the aluminum foil wrapping is poor or missing, the reflected light will be weakened. Sensor 2 will identify this and trigger an alarm to stop the machine. Personnel can then directly cut off the area with poor aluminum foil wrapping. If the abnormality is not serious, the aluminum foil wrapping can be manually smoothed out to ensure tight wrapping, thereby reducing the generation of defective products, reducing high-frequency spikes in data cables, and improving product quality.
[0032] The detection end of sensor 2 faces the axial direction of guide hole 11, and sensor 2 is embedded in the inner wall of guide hole 11; and sensor 2 does not protrude inward on the inner wall of guide hole 11, so as not to affect the wire travel and aluminum foil wrapping, and not to affect the wire wrapping operation.
[0033] There are four sensors 2, and the lateral spacing 'a' between each sensor 2 is 90°.
[0034] Sensor 2 is evenly distributed in a spiral pattern on the inner wall of guide hole 11;
[0035] Each sensor 2 is positioned at a different height; the spacing d between each sensor 2 is the same, and d is between 5-12mm. This staggered installation of the sensors at different heights prevents interference between the light sources of the four sensors 2, allowing them to cover different arc angles of the wire from four directions. This detects the complete coverage of the aluminum foil on the wire's exterior. Because the aluminum foil is smooth and reflects light strongly, while the cable surface is rough and reflects light weakly, if there is poor coverage or missing foil, the reflected light weakens, triggering an alarm and shutdown by the sensor.
[0036] The horizontal spacing angle α of each sensor 2 is the same, so that the horizontal detection range radian of each sensor 2 is the same;
[0037] Mounting plate 3 is the mounting plate of the equipment. Upper mold 1 is vertically locked to the top of mounting plate 3 by threads. The axis of guide hole 11 is perpendicular to the top plane of mounting plate 3. Lower mold 31 is installed at the bottom of mounting plate 3. Aluminum foil is restricted and constrained to cover the surface of the wire in lower mold 31. Upper mold 1 makes the wire and aluminum foil fit more tightly and guides them. Therefore, aluminum foil is completely covered on the surface of the wire in lower mold 31. Upper mold 1 mainly plays the role of pressing and bonding.
[0038] like Figure 1 As shown, the wire and aluminum foil pass through the lower mold and upper mold 1 from bottom to top. After passing through the upper mold 1, the wire covered with aluminum foil is then braided by aluminum wire. Therefore, it can only be detected immediately after the aluminum foil is wrapped. Otherwise, there is not enough space to detect the aluminum foil wrapping. Only the signal transmission of the wire can be detected in the end. This device improves this situation.
[0039] During testing, the wire enters through the lower mold 31 and passes through its interior. The aluminum foil and the wire are confined and wrapped together. The aluminum foil covers the surface of the wire. After wrapping, the wire passes through each sensor 2 in sequence. Each sensor 2 detects the aluminum foil outside the wire. This device detects the intensity of light, not the image. Therefore, this device can perform detection inside the upper mold 1 in low light conditions, and does not require a clear image. It only detects the intensity of diffuse reflected light from the aluminum foil. This device utilizes the characteristics of aluminum foil, making detection convenient and flexible in design. It can effectively detect aluminum foil in a very small space, and it can completely detect every part. The detection is comprehensive, and the detection effects of sensors 2 at different heights do not interfere with each other, resulting in high detection accuracy.
[0040] Furthermore, in the description of this utility model, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0041] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.
Claims
1. A device for detecting defects in the external aluminum foil wrapping of wires on a braiding machine, characterized in that, include: Upper mold (1) and sensor (2); The upper mold (1) is a mold covered with aluminum foil. The upper mold (1) has a circular tube structure with a guide hole (11) inside. The guide hole (11) vertically penetrates the upper and lower ends of the upper mold (1). The sensor (2) has a cylindrical structure, and multiple sensors (2) are fitted and inserted into the inner wall of the guide hole (11); the data line of the sensor (2) extends out of the upper mold (1); The detection end of the sensor (2) faces the axial direction of the guide hole (11), and the sensor (2) is embedded in the inner wall of the guide hole (11); Multiple sensors (2) are evenly spaced in a spiral pattern on the inner wall of the guide hole (11); Each of the sensors (2) is located at a different height.
2. The detection device for defects in the outer aluminum foil covering of wires on a braiding machine according to claim 1, characterized in that: The sensor (2) is a diffuse reflection photoelectric sensor.
3. The detection device for defects in the outer aluminum foil covering of wires on a braiding machine according to claim 1, characterized in that: The spacing height d of each of the sensors (2) is the same, and the height d is between 5 and 12 mm.
4. The detection device for defects in the outer aluminum foil covering of wires on a braiding machine according to claim 1, characterized in that: The number of sensors (2) is four, and the lateral spacing angle α of each sensor (2) is 90°.