A method for manufacturing a new 5G shielding cover with a stretching notch
By introducing a stretching process into the manufacturing method of the shield cover, the problem of unstable gaps in the traditional shield cover is solved, and higher dimensional accuracy and more stable shape are achieved, meeting the performance and accuracy requirements of 5G equipment for shield cover.
Patent Information
- Application Number
- CN202411858040.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-04-08
AI Technical Summary
The size and shape of the notch of the traditional shield cover is unstable, which leads to the easy damage of the copper cables on the PCB board, affecting the assembly quality and delivery quality. Especially in the 5G era, the requirements for the dimensional accuracy of the notch are higher.
The production method of a new 5G shield with tensile notches is adopted. By designing a tensile mold and performing multiple stretching processes, the depth and shape of the tensile notches meet the design requirements, reducing the friction between the material and the mold, and improving the tensile quality.
The stability of the size and shape of the shield cover notch is achieved, the demand for mold manufacturing costs is reduced, the production efficiency and product quality of PCB boards are improved, and the requirements of 5G equipment for shield cover performance and accuracy are ensured.
Smart Images
Figure CN119789398A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of shielding covers, and in particular to a method for manufacturing a new 5G shielding cover with a stretching notch. Background Art
[0002] Shielding devices are available on terminal products such as communications that require shielding functions. Shielding devices are installed on the PCB board of the electronic module to achieve a shielding effect. Scope of use of shielding covers: used in conjunction with PCB circuit boards, set-top boxes, mobile phones, telecommunications equipment, etc. Function of shielding covers: mainly block electromagnetic waves outside the cover to prevent harm from electromagnetic radiation. Shielding covers are tools used to shield electronic signals. Their function is to shield the influence of external electromagnetic waves on the internal circuit and the radiation of electromagnetic waves generated internally.
[0003] With the advent of 5G, more high-frequency data transmission is required, so a large number of notched shielding covers are used to facilitate PCB board data transmission. Traditionally, data transmission on PCB boards is done by opening notches in the shielding cover to allow the copper busbars on the PCB board to pass through. The shielding cover plays a shielding role, while the copper busbars on the PCB board play a role in data transmission.
[0004] The function of the traditional shielding cover gap is to allow the empty copper busbar to function, which is convenient for fast data transmission. However, due to the limitation of mold manufacturing process and cost, the shielding cover gap tolerance is generally around plus or minus 0.15 mm; if the gap height of 0.3 mm is unstable, or the gap shape is unstable, and the required data size and tolerance are not met, it is very easy to damage the data output copper busbar on the PCB board, and it is easy to produce defective or inferior products, waste, and seriously affect the quality and delivery quality of the assembled PCB board. Therefore, it is very important to stabilize and ensure the gap size.
[0005] Now, due to the rapid development of the 5G era, the higher the gap size accuracy is required, the better it can protect the copper busbar on the PCB board and transmit data faster and more stably. The higher the gap requirement is, the higher the manufacturing cost will be. The number of copper busbar output lines on the PCB board will also increase, which will also increase the accuracy of the shielding cover gap accordingly. The actual demand is that the shielding cover gap accuracy is more stable and the manufacturing cost should be reduced. Summary of the invention
[0006] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a method for manufacturing a new 5G shielding cover with a stretching notch, improve the production efficiency of the PCB board, and improve the stability and reliability of the PCB board. The stretching notch shielding cover completely solves the difficulty of the shielding cover part of the PCB board transmission copper bus being damaged by the notch, reduces the cost of manufacturing parts, improves the quality of parts, reduces risks, and reduces mold manufacturing costs.
[0007] Reduce manufacturing costs, reduce damage to PCB copper bus output lines, improve production technology, and better provide high-quality supporting components for 5G services.
[0008] The original shielding cover gap is obtained by punching and then stretching the shielding cover. The gap size and shape are unstable and the tolerance is large. When the gap height is too small, it becomes irregular due to the influence of stretching, which is easy to damage or destroy the transmission copper bus on the PCB board, causing the device to be unstable or damaged. The use of stretching the shielding cover overcomes the disadvantages of unstable gap size and unstable gap shape.
[0009] The present invention provides a method for manufacturing a new 5G shielding cover with a stretching notch, comprising the following steps:
[0010] S1: Design the drawing die, and design the drawing notch and the position of the transmission copper busbar;
[0011] S2: Perform a stretching process, including the first stretching, the second stretching or multiple stretching. Place the prepared metal sheet on the positioning device of the stretching die to ensure the accurate position of the sheet, then start the stretching equipment, slowly move the punch downward, and stretch the sheet for the first time. After the first stretching, a semi-finished product with a preliminary shielding cover shape and a partial stretching notch shape is obtained. At this time, the depth and shape of the stretching notch have not yet fully met the final design requirements, so it is stretched again. The semi-finished product after the first stretching is stretched again to further adjust the shape and depth of the stretching notch and the size of the transmission copper busbar. Before each stretching, the semi-finished product must be lubricated. Special metal stretching oil can be used to reduce the friction between the material and the die and improve the stretching quality.
[0012] The number of stretching is determined according to the complexity and depth of the shielding cover, usually 2-4 times. After each stretching, the stretched part must be inspected for size to ensure that the size of the stretching notch and the concession part gradually approaches the design requirements, and the size tolerance is controlled within ±0.05mm.
[0013] During the stretching process of the shielding cover, the metal material undergoes plastic deformation around the stretching notch to form a naturally transitional curved surface or inclined surface connecting the main body of the shielding cover and the stretching notch, making the entire structure more stable in terms of mechanical properties.
[0014] S3: Post-processing, deburring and cleaning, and surface treatment.
[0015] The above innovative stretching process is used to produce a shielding cover with a stretching notch, without the need for a punching process. This can effectively improve the production efficiency and product quality of the shielding cover, especially at the position where the transmission copper busbar makes way, to achieve more precise dimensional control and meet the requirements of 5G equipment for shielding cover performance and precision.
[0016] Furthermore, in S1, the cavity of the mold is designed according to the outer contour of the shielding cover and the shape and size of the stretching notch. Considering the flow law of the metal during the stretching process, a reasonable transition radius and demolding slope are designed at the stretching notch to prevent the material from breaking or being stretched during the stretching process.
[0017] Furthermore, in S1, the demoulding slope is between 1° and 3°.
[0018] Furthermore, in S1, for the stretching portion of the transmission copper busbar, the gap between the punch and the die of the die is controlled within an appropriate range, which is 5-10% of the thickness of the plate, to ensure that the stretched shape of the yield is accurate and has high dimensional accuracy.
[0019] Furthermore, in S2, the stretching speed is controlled at 5-20 mm / s and adjusted according to the material and thickness of the plate; during the stretching process, the change of the stretching force is monitored in real time to prevent the plate from breaking due to excessive stretching force.
[0020] Furthermore, in S2, after multiple stretching, the shield cover is reshaped to eliminate the rebound and deformation generated during the stretching process.
[0021] Furthermore, in S2, a special shaping die is used to press the shielding cover with a small pressure, so that the shape of the stretching notch and the concession part is more accurate, and the dimensional accuracy is further improved, and finally the dimensional accuracy of the stretching notch is within ±0.02mm, which meets the installation requirements of the transmission copper busbar.
[0022] Furthermore, in S3, grinding, polishing or chemical deburring is used to make the surface of the shielding cover smooth; then cleaning is performed to remove oil stains and metal debris on the surface, using an ultrasonic cleaning machine with a special cleaning agent to ensure the cleaning effect.
[0023] Furthermore, in S3, surface treatment is performed according to the use environment and performance requirements of the shielding cover; electroplating treatment is performed to improve the corrosion resistance and conductivity of the shielding cover, and the thickness of the electroplating layer is between 3-10μm; or passivation treatment is performed to form a passivation film on the surface of the shielding cover to enhance its antioxidant ability.
[0024] Furthermore, the stretching notch obtained by stretching is an isosceles trapezoid.
[0025] The innovative stretched notch shielding cover fundamentally solves the possibility of destroying or damaging the copper busbars on the PCB. It can fully ensure the stability of the components after assembly and welding, and will not damage the copper busbars on the PCB. It can ensure that data is stable through the copper busbars on the PCB to transmit data or signals. Correspondingly, the shielding cover with a stretched notch is more stable and more competitive than the shielding cover with a punched notch in PCB data transmission.
[0026] The 5G shielding cover with stretching notch must have two special functions. First, it is a shielding cover, which has all the functions and effects of the same shielding cover. Second, there must be one or more stretching notches on the shielding cover, and the corresponding position and stretching notch size on the shielding cover are selected according to the requirements and size of the data transmission of the PCB board. Third, the shielding cover with stretching notch will not damage the copper busbars that transmit data on the PCB board. Fourth, the transmission copper busbars give way to the stretching notch without punching process, and are manufactured by stretching process.
[0027] Compared with the prior art, the present invention has the following advantages:
[0028] Reduce manufacturing costs, reduce damage to PCB copper busbar output lines, improve production technology, and better provide high-quality supporting components for 5G services. Ensure the stability of 5G communication components from being damaged by gaps, greatly improve the quality of 5G communication components, improve production efficiency, and directly improve the quality and stability of the industry's manufacturing technology skills in 5G terminals. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 The structure of the new 5G shielding cover with a stretching notch obtained by the manufacturing method of Example 1 is shown in FIG. Figure 1 ;
[0030] Figure 2 The structure of the new 5G shielding cover with a stretching notch obtained by the manufacturing method of Example 1 is shown in FIG. Figure 2 .
[0031] Reference numerals: 1 - stretch notch. DETAILED DESCRIPTION
[0032] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms and other features not clearly described in this technical solution are all considered to be common technical features disclosed in the prior art.
[0033] Example 1
[0034] This embodiment provides a method for manufacturing a new 5G shielding cover with a stretching notch, comprising the following steps:
[0035] S1: Design the stretching die, and design the stretching notch 1 and the transmission copper busbar to make way for it;
[0036] S2: Perform a stretching process, including the first stretching, the second stretching or multiple stretching, place the prepared metal sheet on the positioning device of the stretching die to ensure the accurate position of the sheet, then start the stretching equipment, slowly move the punch downward, and stretch the sheet for the first time; after the first stretching, a semi-finished product having a preliminary shielding cover shape and a partial stretching notch 1 shape is obtained, at which point the depth and shape of the stretching notch 1 have not yet fully met the final design requirements, and is stretched again; the semi-finished product after the first stretching is stretched again to further adjust the shape and depth of the stretching notch 1 and the size of the transmission copper busbar; the semi-finished product must be lubricated before each stretching, and a special metal stretching oil can be used to reduce the friction between the material and the die and improve the stretching quality.
[0037] The number of stretching is determined according to the complexity and stretching depth of the shielding cover, generally 2-4 times. After each stretching, the stretched part must be inspected for size to ensure that the size of the stretching notch 1 and the concession part gradually approaches the design requirements, and the size tolerance is controlled within ±0.05mm.
[0038] During the stretching process of the shielding cover, the metal material undergoes plastic deformation around the stretching notch 1, forming a naturally transitional curved surface or inclined surface connecting the main body of the shielding cover and the stretching notch 1, making the entire structure more stable in terms of mechanical properties.
[0039] S3: Post-processing, deburring and cleaning, and surface treatment.
[0040] The above innovative stretching process is used to produce a shielding cover with a stretching notch 1, without the need for a punching process, which can effectively improve the production efficiency and product quality of the shielding cover, especially at the position where the transmission copper busbars give way, which can achieve more precise size control and meet the requirements of 5G equipment for shielding cover performance and accuracy. Figure 1 , 2 As shown,
[0041] In a specific implementation, in S1, the cavity of the mold is designed according to the outer contour of the shielding cover and the shape and size of the stretching notch 1. Considering the flow law of the metal during the stretching process, a reasonable transition radius and demolding slope are designed at the stretching notch 1 to prevent the material from breaking or being stretched during the stretching process.
[0042] In a specific embodiment, in S1, the demoulding slope is between 1-3°.
[0043] In a specific implementation, in S1, for the stretching portion of the copper busbar that is used to make way for the transmission copper busbar, the gap between the punch and the die of the die is controlled within a suitable range, which is 5-10% of the thickness of the sheet, to ensure that the stretched shape of the make-way is accurate and has high dimensional accuracy.
[0044] In a specific implementation, in S2, the stretching speed is controlled at 5-20 mm / s and adjusted according to the material and thickness of the plate; during the stretching process, the change of the stretching force is monitored in real time to prevent the plate from breaking due to excessive stretching force.
[0045] In a specific implementation, in S2, after multiple stretchings, the shielding cover is reshaped to eliminate the rebound and deformation generated during the stretching process.
[0046] In a specific implementation, in S2, a special shaping mold is used to press the shielding cover with a small pressure, so that the shapes of the stretching notch 1 and the yielding part are more accurate, and the dimensional accuracy is further improved, and finally the dimensional accuracy of the stretching notch 1 is within ±0.02mm, which meets the installation requirements of the transmission copper busbar.
[0047] In a specific implementation, in S3, grinding, polishing or chemical deburring is used to make the surface of the shielding cover smooth; then cleaning is performed to remove oil stains and metal debris on the surface, using an ultrasonic cleaning machine with a special cleaning agent to ensure the cleaning effect.
[0048] In a specific implementation, in S3, surface treatment is performed according to the use environment and performance requirements of the shielding cover; electroplating treatment is performed to improve the corrosion resistance and conductivity of the shielding cover, and the thickness of the electroplating layer is between 3-10μm; or passivation treatment is performed to form a passivation film on the surface of the shielding cover to enhance its antioxidant ability.
[0049] In a specific embodiment, the stretching notch 1 obtained by stretching is in the shape of an isosceles trapezoid.
[0050] The innovative stretched notch shielding cover fundamentally solves the possibility of destroying or damaging the copper busbars on the PCB. It can fully ensure the stability of the components after assembly and welding, and will not damage the copper busbars on the PCB. It can ensure that data is stable through the copper busbars on the PCB to transmit data or signals. Correspondingly, the shielding cover with a stretched notch is more stable and more competitive than the shielding cover with a punched notch in PCB data transmission.
[0051] The 5G shielding cover with stretching notch must have two special functions. First, it is a shielding cover, which has all the functions and features of the same shielding cover. Second, there must be one or more stretching notches on the shielding cover, and the corresponding position and size of the stretching notch 1 on the shielding cover should be selected according to the requirements and size of the data transmission on the PCB board. Third, the shielding cover with stretching notch will not damage the copper busbars that transmit data on the PCB board. Fourth, the transmission copper busbars give way to the stretching notch 1 without punching process, and are manufactured by stretching process.
[0052] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.
[0053] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.
Claims
1. A method for manufacturing a new 5G shielding cover with a stretching notch, characterized in that: The following steps are involved: S1: Design the drawing die, and design the drawing notch (1) and the position of the transmission copper busbar; S2: Performing a stretching process, including the first stretching, the second stretching or the multiple stretching, placing the prepared metal sheet on the positioning device of the stretching die to ensure the accurate position of the sheet, and then starting the stretching device to slowly move the punch downward to perform the first stretching on the sheet; performing a second stretching on the semi-finished product after the first stretching, and further adjusting the shape and depth of the stretching notch (1) and the size of the space for the transmission copper busbar; S3: Post-processing, deburring and cleaning, and surface treatment.
2. The method for manufacturing a new 5G shielding cover with a stretching notch according to claim 1, characterized in that: In S1, the mold cavity is designed according to the outer contour of the shielding cover and the shape and size of the stretching notch (1). Considering the flow law of the metal during the stretching process, a reasonable transition radius and demoulding slope are designed at the stretching notch (1) to prevent the material from being broken or stretched during the stretching process.
3. The method for manufacturing a new 5G shielding cover with a stretching notch according to claim 1, characterized in that: In S1, the draft angle is between 1-3°.
4. The method for manufacturing a new 5G shielding cover with a stretching notch according to claim 1, characterized in that: In S1, for the stretching part of the copper busbar, the gap between the punch and the die of the die is controlled within an appropriate range, which is 5-10% of the thickness of the sheet, to ensure that the stretched shape of the yield is accurate and has high dimensional accuracy.
5. The method for manufacturing a new 5G shielding cover with a stretching notch according to claim 1, characterized in that: In S2, the stretching speed is controlled at 5-20 mm / s and adjusted according to the material and thickness of the plate; during the stretching process, the changes in the stretching force are monitored in real time to prevent the plate from breaking due to excessive stretching force.
6. The method for manufacturing a new 5G shielding cover with a stretching notch according to claim 1, characterized in that: In S2, after multiple stretching, the shield cover is reshaped to eliminate the rebound and deformation generated during the stretching process.
7. The method for manufacturing a new 5G shielding cover with a stretching notch according to claim 1, characterized in that: In S2, a special shaping die is used to press the shielding cover with a small pressure, so that the shapes of the stretching notch (1) and the concession part are more accurate, and the dimensional accuracy is further improved. Finally, the dimensional accuracy of the stretching notch (1) is within ±0.02mm, meeting the installation requirements of the transmission copper busbar.
8. The method for manufacturing a new 5G shielding cover with a stretching notch according to claim 1, characterized in that: In S3, grinding, polishing or chemical deburring is used to make the surface of the shielding cover smooth; then cleaning is performed to remove oil stains and metal debris on the surface, using an ultrasonic cleaning machine with a special cleaning agent to ensure the cleaning effect.
9. The method for manufacturing a new 5G shielding cover with a stretching notch according to claim 1, characterized in that: In S3, surface treatment is performed according to the use environment and performance requirements of the shielding cover; Perform electroplating treatment to improve the corrosion resistance and conductivity of the shielding cover, with the thickness of the electroplating layer being between 3-10 μm; or perform passivation treatment to form a passivation film on the surface of the shielding cover to enhance its anti-oxidation ability.
10. The method for manufacturing a new 5G shielding cover with a stretching notch according to claim 1, characterized in that: The stretching notch (1) obtained by stretching is in the shape of an isosceles trapezoid.