A shielding jig for metal wire belt local metallization processing

Abstract

The utility model relates to a kind of shielding jigs for metal wire belt local metallization processing, the shielding jig for metal wire belt local metallization processing includes upper cover plate, lower tray and positioning member;Spraying opening and first positioning hole that pass through the upper cover plate are opened on the upper cover plate;Second positioning hole that pass through the lower tray is opened on the lower tray;Wherein, the metal wire belt is located between the upper cover plate and the lower tray, the first positioning hole is concentric with the second positioning hole, the positioning member is inserted with the first positioning hole and the second positioning hole, for fixing the position between the upper cover plate and the lower tray, and make the upper cover plate and the lower tray clamping fixed metal wire belt.The shielding jig for metal wire belt local metallization processing can effectively resist the impact of high-speed powder jet in cold spraying processing.

Description

Technical Field

[0001] This utility model belongs to the field of metal surface coating processing technology, and in particular relates to a masking fixture for local metallization processing of metal wire strips. Background Technology

[0002] In the field of wireless communication equipment, antennas typically use metal strips as their radiators or coupling elements. Traditionally, the local metallization of these metal strips mainly relies on suspension electroplating processes, such as electroplating with nickel, copper, or tin. In this process, non-plated areas need to be shielded for protection, and the conventional method is to use adhesive tape or spot-apply anti-plating adhesive. However, this shielding method has many drawbacks: First, the application and removal of adhesive shielding materials rely on manual operation, resulting in low production efficiency and a high risk of plating solution leakage due to poor adhesion, causing product corrosion or short circuits, making it difficult to guarantee yield; second, adhesive materials are disposable consumables, which not only increases production costs but also brings environmental pressure.

[0003] With the development of additive manufacturing and green manufacturing technologies, cold spraying technology, as an emerging solid particle deposition process, is considered a potential alternative to traditional electroplating due to its advantages such as low-temperature processing, dense coating, and minimal impact on the substrate. The cold spraying process involves spraying metal powder particles accelerated to supersonic speeds onto the substrate surface, achieving coating deposition through plastic deformation.

[0004] However, when applying cold spray technology to the localized metallization of antenna metal strips, traditional electroplating masking solutions are completely unsuitable. The continuous mechanical impact force generated by the high-speed particle stream of cold spray is far beyond the capacity of tapes or resist adhesives, causing instantaneous damage to the masking material or workpiece displacement, leading to processing failure. For example, the high momentum of the high-speed powder jet means that if the fixture cannot provide sufficiently strong and uniform clamping force, the metal strip will shift or vibrate during processing, resulting in inaccurate coating positioning and product scrap. Furthermore, the small size and high kinetic energy of cold spray powder particles make them highly susceptible to penetrating through the microscopic gaps between the fixture and the workpiece, contaminating non-target areas. Traditional intermittent masking cannot meet the near-absolute sealing requirements. Simultaneously, the masking boundary (i.e., the opening edge) of the fixture needs to withstand continuous erosion by the metal powder; if the fixture material is not wear-resistant, it will quickly deteriorate, lose precision, and prevent stable mass production. Utility Model Content

[0005] In view of this, the present invention provides a shielding fixture for partial metallization of metal wire strips, which solves the problems in the partial metallization process of metal wire strips in antennas.

[0006] To achieve the above objectives, the technical solution of this utility model is to provide a shielding fixture for partial metallization of metal wire strips. During cold spraying of the metal wire strip in an antenna, the fixture fixes the metal wire strip. It includes an upper cover plate, a lower tray, and a positioning component. The upper cover plate has a spraying opening penetrating the upper cover plate and a first positioning hole. The lower tray has a second positioning hole penetrating the lower tray. The metal wire strip is located between the upper cover plate and the lower tray. The first positioning hole and the second positioning hole are concentric. The positioning component is inserted into the first positioning hole and the second positioning hole to fix the position between the upper cover plate and the lower tray, and to clamp and fix the metal wire strip between the upper cover plate and the lower tray.

[0007] In one specific embodiment, a positioning groove is provided on the lower tray, and the metal wire strip is placed in the positioning groove to limit the circumferential movement of the metal wire strip toward the lower tray.

[0008] In one specific embodiment, there are multiple metal wire strips, which are arranged sequentially in the positioning groove.

[0009] In one specific embodiment, the number of spray openings is multiple sets, and the multiple sets of spray openings are arranged sequentially along the arrangement direction of the multiple metal wire strips. Each set of spray openings contains multiple spray openings, and the multiple spray openings are arranged sequentially along the length direction of the metal wire strips.

[0010] In one specific embodiment, the metal wire strip has limiting holes on opposite sides, the limiting holes are concentric with the first positioning hole and the second positioning hole, and the positioning member is sequentially inserted into the first positioning hole, the limiting hole and the second positioning hole.

[0011] In one specific embodiment, the number of the first positioning hole and the second positioning hole is at least two sets, and the two sets of the first positioning hole and the two sets of the second positioning hole are symmetrically arranged on opposite sides of the length direction of the metal wire strip.

[0012] In one specific embodiment, the lower tray has multiple notches on opposite sides along the length of the metal strip.

[0013] In one specific embodiment, the upper cover is made of metal or ceramic, and the lower tray is made of metal plate or non-metal plate.

[0014] In one specific embodiment, the positioning element is a positioning pin, which is inserted into the first positioning hole and the second positioning hole in an interference fit, and the number of positioning elements is the same as the number of the first positioning hole and the second positioning hole.

[0015] In a specific embodiment, the spraying opening is a square hole.

[0016] Compared with the prior art, the shielding fixture for partial metallization of metal wire strips provided by this utility model has the following beneficial effects: By clamping and fixing the metal wire strip with the upper cover plate and the lower tray, it can effectively resist the impact of high-speed powder jets in cold spraying, completely eliminate the micro-movement gaps and workpiece displacement between fixtures, ensure clear outline and precise position of local metallized coating, and at the same time, the fixture structure is stable and reliable, suitable for continuous batch production, and significantly improves processing yield and production efficiency. Attached Figure Description

[0017] Figure 1 This is an exploded structural diagram of a shielding fixture for partial metallization processing of metal wire strips according to the present invention. Figure 2 for Figure 1 Schematic diagram of the upper and middle cover plates; Explanation of reference numerals in the attached figures: 1. Top cover plate; 11. Spraying opening; 12. First positioning hole; 2. Lower tray; 21. Second positioning hole; 22. Positioning groove; 23. Notch. Detailed Implementation

[0018] 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 only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0020] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0021] like Figures 1 to 2As shown, the first embodiment of this utility model provides a shielding fixture for partial metallization of metal wire strips. When performing cold spraying on the metal wire strip N in the antenna, the metal wire strip N is fixed. The fixture includes: an upper cover plate 1, a lower tray 2, and a positioning component (not shown in the figure). The upper cover plate 1 has a spraying opening 11 that penetrates the upper cover plate 1 and a first positioning hole 12; A second positioning hole 21 is provided on the lower tray 2, penetrating the lower tray 2; The metal wire strip N is located between the upper cover plate 1 and the lower tray 2. The first positioning hole 12 and the second positioning hole 21 are concentric. The positioning member is inserted into the first positioning hole 12 and the second positioning hole 21 to fix the position between the upper cover plate 1 and the lower tray 2, and to clamp and fix the metal wire strip N between the upper cover plate 1 and the lower tray 2.

[0022] Understandably, when it is necessary to perform local metallization of the metal wire strip N through cold spraying, the metal wire strip N can be placed on the lower tray 2, and the upper cover plate 1 can be fastened to the lower tray 2 to form a shield for the metal wire strip. Then, the positioning member is simultaneously inserted into the first positioning hole 11 and the second positioning hole 21 to fix the relative position between the upper cover plate 1 and the lower tray 2, and to clamp the upper cover plate 1 and the lower tray 2 together to hold and fix the metal wire strip N, thereby fixing the relative position of the upper cover plate 1, the lower tray 2 and the metal wire strip N. Finally, by performing cold spraying on the fixture from the direction towards the upper cover plate 1, the local metallization of the metal wire strip N can be achieved by using the spraying opening 11.

[0023] It should be noted that the positioning component can be a positioning pin, bolt / nut, etc., as long as it can be inserted into both the first positioning hole 12 and the second positioning hole 21 to position the upper cover plate 1 and the lower tray 2, and to clamp the upper cover plate 1 and the lower tray 2 together with the metal wire N. Preferably, the positioning component is a positioning pin.

[0024] The shape and position of the spray opening 11 can be customized according to the processing requirements of local metallization, as long as the local metallization of the metal wire N can be achieved through the spray opening 11 during spraying.

[0025] When the positioning component is inserted into the first positioning hole 12 and the second positioning hole 21, it shall not interfere with the metal wire strip N located between the upper cover plate 1 and the lower tray 2. That is, the size and / or shape of the metal wire strip N shall ensure that the positioning component is not inserted into the first positioning hole 12 and the second positioning hole 21.

[0026] Furthermore, a positioning groove 22 is provided on the lower tray 2, and the metal wire strip N is placed in the positioning groove 22 to limit the metal wire strip N to move circumferentially towards the lower tray 2.

[0027] It is understandable that by setting the positioning groove 22, the metal strip N can be limited along the circumferential direction of the lower tray 2. Based on the upper cover plate 1 and the lower tray 2 clamping the metal strip N, the movement of the metal strip N is further restricted to improve the accuracy of the spraying process.

[0028] Furthermore, there are multiple metal wire strips N, which are arranged sequentially in the positioning groove 22.

[0029] Understandably, the size of the positioning groove 22 is adapted to the number of metal strips N. When there is only one metal strip N, the size of the positioning groove 22 is just right to fit one metal strip N, thus limiting the movement of that metal strip N. When there are multiple metal strips N, the size of the positioning groove 22 is adapted to multiple metal strips N, as long as it can limit the displacement of the metal strips N in the direction of the lower tray 2 periphery.

[0030] Furthermore, the number of spray openings 11 is multiple sets, and the multiple sets of spray openings 11 are arranged sequentially along the arrangement direction of multiple metal wire strips N. Each set of spray openings 11 has multiple openings, and the multiple spray openings 11 are arranged sequentially along the length direction of the metal wire strip N.

[0031] It is understandable that by setting multiple sets / multiple spray openings 11, multiple parts on multiple metal wire strips N can be sprayed simultaneously.

[0032] Furthermore, the spraying opening 11 is a square hole.

[0033] Furthermore, the metal wire strip N has limiting holes on its opposite sides. The limiting holes are concentric with the first positioning hole 12 and the second positioning hole 21. The positioning member is inserted into the first positioning hole 12, the limiting hole and the second positioning hole 21 in sequence.

[0034] It is understandable that by sequentially inserting the positioning component into the first positioning hole 12, the limiting hole and the second positioning hole 21, the displacement of the metal wire strip N in the circumferential direction of the lower tray 2 can be restricted by the limiting hole.

[0035] It should be noted that in this embodiment, the metal wire strip N has a limiting hole, and the upper cover plate 1 and lower tray 2 of the fixture are designed and formed according to the shape of the metal wire strip N, so that the positioning member can be inserted into the first positioning hole 12, the limiting hole and the second positioning hole 21 simultaneously. In other embodiments, the metal wire strip N may not have a limiting hole, and can be inserted into the positioning hole 12 and the second positioning hole 21 by the positioning member, so that the metal wire strip N can be fixed by the clamping of the upper cover plate 1 and the lower tray 2, and the metal wire strip N can also be partially metallized by spraying.

[0036] Furthermore, the number of the first positioning hole 12 and the second positioning hole 21 is at least two sets, and the two sets of the first positioning hole 12 and the second positioning hole are symmetrically arranged on opposite sides of the length direction of the metal wire strip N.

[0037] It is understandable that the number of first positioning holes 12 and second positioning holes 21 in each group can be arbitrary, as long as they can be simultaneously inserted into the first positioning holes 12 and second positioning holes 21 in each group through positioning components. For example, when there is only one first positioning hole 12 and one second positioning hole in each group, two positioning components are inserted into the two groups of first positioning holes 12 and second positioning holes 21 respectively. When there are two first positioning holes 12 and two positioning holes 21 in each group, four positioning components are inserted into the two groups of first positioning holes 12 and second positioning holes 21 respectively.

[0038] Preferably, there are eight sets of first positioning holes 12 and two positioning holes 21. The eight sets of first positioning holes 12 and two positioning holes 21 are symmetrically arranged on opposite sides of the length direction of the metal wire strip N. That is, there are four sets of first positioning holes 12 and two positioning holes 21 on each side. In this case, there are two positioning holes 12 and two positioning holes 21 in each set.

[0039] Furthermore, the lower tray 2 has multiple notches 23 on opposite sides along the length of the metal strip N.

[0040] Understandably, by setting multiple notches 23, operators or robotic arms can more easily and smoothly pick up or put down the lower pallet 2 through the notches 23 during production and loading / unloading processes. Furthermore, when the upper cover 1 and the lower pallet 2 are pressed very tightly together by the positioning components, the notches 23 can serve as a point of force application for inserting pry bars or special tools, facilitating the separation of the upper cover 1 from the lower pallet 2 and preventing damage to the fixture or product.

[0041] Furthermore, the upper cover plate 1 is made of metal or ceramic, and the lower tray 2 is made of metal plate or non-metal plate.

[0042] Understandably, the top cover 1 is made of materials such as metal or ceramic, which can withstand the impact of the high-speed powder jet formed by cold spraying, thus increasing its service life.

[0043] Furthermore, the positioning element is a positioning pin, which is inserted into the first positioning hole 12 and the second positioning hole 21 by an interference fit, and the number of positioning elements is the same as the number of the first positioning hole 12 and the second positioning hole 21.

[0044] Understandably, the positioning component uses an interference fit with the first positioning hole 12 and the second positioning hole 21, which completely eliminates the fit clearance between the positioning component and the first positioning hole 12 and the second positioning hole 21, forming a rigid connection. This not only effectively prevents micro-movement misalignment that may occur under the impact of high-speed powder jets in cold spraying, ensuring the accuracy and consistency of the coating boundary, but also significantly improves the overall rigidity and vibration resistance of the fixture. At the same time, it avoids loosening and wear of pins due to frequent use, thereby extending the service life of the fixture and ensuring the processing accuracy and product yield of mass production.

[0045] The working principle of this invention is as follows: First, according to the shape and size of the metal wire strip N, a corresponding upper cover plate 1 and lower tray 2 are formed. When it is necessary to perform cold spraying on the metal wire strip N to achieve local metallization, the metal wire strip N is first placed on the lower tray 2. Then, the upper cover plate 1 and the lower tray 2 are fastened together, and the positioning element is inserted into the first positioning hole 12 and the second positioning hole 21 to press the upper cover plate 1 and the lower tray 2 tightly, so that the upper cover plate 1 and the lower tray 2 clamp the metal wire strip N. After clamping the metal wire strip N, the part of the metal wire strip N to be sprayed is exactly located at the spraying opening 11. Finally, cold spraying is performed from the direction of the upper cover plate 1 to achieve local metallization of the metal wire strip N by utilizing the spraying opening 11.

[0046] Compared with the prior art, the shielding fixture for local metallization of metal wire strips provided by this utility model clamps and fixes the metal wire strip with the upper cover plate and the lower tray, which can effectively resist the impact of high-speed powder jet in cold spraying, completely eliminate the micro-movement gap between fixtures and workpiece displacement, ensure clear outline and accurate position of local metallization coating, and at the same time, the fixture structure is stable and reliable, suitable for continuous batch production, and significantly improves processing yield and production efficiency.

[0047] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A shielding fixture for partial metallization of metal wire strips, used to fix the metal wire strips during cold spraying of an antenna, characterized in that, include: Top cover, bottom tray and positioning components; The upper cover plate is provided with a spraying opening and a first positioning hole that penetrate the upper cover plate; The lower tray is provided with a second positioning hole that penetrates the lower tray; The metal strip is located between the upper cover and the lower tray. The first positioning hole and the second positioning hole are concentric. The positioning member is inserted into the first positioning hole and the second positioning hole to fix the position between the upper cover and the lower tray, and to clamp and fix the metal strip between the upper cover and the lower tray.

2. The shielding fixture for partial metallization of metal wire strips as described in claim 1, characterized in that: The lower tray has a positioning groove, and the metal wire strip is placed in the positioning groove to limit the movement of the metal wire strip in the circumferential direction of the lower tray.

3. A shielding fixture for partial metallization of metal wire strips as described in claim 2, characterized in that: The number of metal wire strips is multiple, and the multiple metal wire strips are arranged sequentially in the positioning groove.

4. A shielding fixture for partial metallization of metal wire strips as described in claim 3, characterized in that: The number of spray openings is multiple sets, and the multiple sets of spray openings are arranged sequentially along the arrangement direction of the multiple metal wire strips. Each set of spray openings contains multiple spray openings, and the multiple spray openings are arranged sequentially along the length direction of the metal wire strips.

5. A shielding fixture for partial metallization of metal wire strips as described in claim 1, characterized in that: The metal wire strip has limiting holes on its opposite sides. The limiting holes are concentric with the first positioning hole and the second positioning hole. The positioning member is inserted into the first positioning hole, the limiting hole and the second positioning hole in sequence.

6. A shielding fixture for partial metallization of metal wire strips as described in claim 1, characterized in that: The number of the first positioning hole and the second positioning hole is at least two sets, and the two sets of the first positioning hole and the two sets of the second positioning hole are symmetrically arranged on opposite sides of the length direction of the metal wire strip.

7. A shielding fixture for partial metallization of metal wire strips as described in claim 1, characterized in that: The lower tray has multiple notches on opposite sides along the length of the metal strip.

8. A shielding fixture for partial metallization of metal wire strips as described in claim 1, characterized in that: The upper cover is made of metal or ceramic, and the lower tray is made of metal plate or non-metal plate.

9. A shielding fixture for partial metallization of metal wire strips as described in claim 1, characterized in that: The positioning element is a positioning pin, which is inserted into the first positioning hole and the second positioning hole by an interference fit, and the number of the positioning elements is the same as the number of the first positioning hole and the second positioning hole.

10. A shielding fixture for partial metallization of metal wire strips as described in claim 1, characterized in that: The spraying opening is a square hole.

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