Radio frequency load bonding fixture
Patent Information
- Application Number
- CN202522531773.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-11-28
AI Technical Summary
在现有技术中，可能缺乏专用的定位工装，或使用的工装结构简单、定位精度不足
[0006]通过采用上述技术方案，通过采用从上至下依次设置的压板、支撑板和底板的三层结构，并分别利用压板上的第一定位孔限制负载座的水平移动、底板上的第二定位孔限制负载帽的水平移动，同时利用设置在中间的支撑板来定位负载并关键性地精确限定负载帽与负载座之间的轴向装配距离，从而实现了对负载帽、负载及负载座三者相对位置与同轴度的协同控制；这一协同控制机制确保了焊接后的射频负载组件在关键装配尺寸上能够稳定地维持在精密的公差范围内，进而从物理结构上保障了射频信号传输的稳定性，最终直接表现为焊接成型的射频负载组件具有优良且一致的电压驻波比性能。
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Figure CN224896214U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of precision electronic component assembly technology, and in particular to a radio frequency load welding fixture. Background Technology
[0002] RF load assembly (consisting of three parts: load cap, load, and load holder, such as...) Figure 2 Assembly typically requires welding. Current technology may lack dedicated positioning fixtures, or the fixtures used may be simple in structure and lack sufficient positioning accuracy. During welding, it is difficult to simultaneously and accurately control the relative positions of the load cap, load, and load base. Specifically, the critical distance between the load cap and load base cannot be guaranteed, resulting in the welded component height or internal clearance exceeding tolerance limits.
[0003] Therefore, this application provides an RF load welding fixture to solve this technical problem. Utility Model Content
[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide an RF load welding fixture to solve the technical problems mentioned in the background art.
[0005] The above-mentioned objective of this application is achieved through the following technical solution: a radio frequency load welding fixture, comprising: a pressure plate, a support plate, a base plate, and a clamping assembly arranged sequentially from top to bottom; The pressure plate is provided with a first positioning hole for positioning the load seat; The base plate is provided with a second positioning hole for positioning the load cap; The support plate is disposed between the pressure plate and the base plate, and is used to position the load and limit the axial distance between the load cap and the load seat.
[0006] By adopting the above technical solution, a three-layer structure consisting of a pressure plate, a support plate, and a base plate arranged sequentially from top to bottom is used. The first positioning hole on the pressure plate restricts the horizontal movement of the load seat, and the second positioning hole on the base plate restricts the horizontal movement of the load cap. At the same time, the support plate in the middle is used to position the load and precisely limit the axial assembly distance between the load cap and the load seat. This achieves coordinated control of the relative position and coaxiality of the load cap, the load, and the load seat. This coordinated control mechanism ensures that the welded RF load assembly can be stably maintained within a precise tolerance range in key assembly dimensions. This, in turn, guarantees the stability of RF signal transmission from a physical structure perspective. Ultimately, this directly results in the welded RF load assembly having excellent and consistent voltage standing wave ratio (VSWR) performance.
[0007] Furthermore, the support plate has a detachable structure and can be separated laterally.
[0008] By adopting the above technical solution and designing the support plate as a laterally separable structure, after welding, the operator does not need to forcibly push or pull the entire load assembly out of the base plate or pressure plate. Instead, the support plate can be easily moved laterally, thereby directly and without damage releasing the radial constraint on the welded assembly, achieving convenient and efficient unloading of the welded product. This design completely avoids the risk of stress on precision welded parts caused by forced disassembly during the unloading process, leading to weld cracking or part displacement. While ensuring high-precision welding results, it greatly improves the ease of use of tooling and production speed.
[0009] Furthermore, the pressure plate, support plate, and base plate are aligned and fixed by means of positioning pins.
[0010] By adopting the above technical solution, the pressure plate, support plate and base plate are aligned and fixed by setting positioning pins, ensuring that all positioning holes on the three-layer structure can maintain a precise and unique relative positional relationship during each clamping and pressing process, thereby completely eliminating the risk of misalignment between the plates due to accumulated manufacturing errors or sliding displacement.
[0011] Furthermore, the clamping assembly includes a clamping screw and a spring sleeved on the outside of the clamping screw, for providing a downward clamping force to the pressure plate during the welding process.
[0012] By adopting the above technical solution, the clamping assembly uses clamping screws fitted with springs. During tightening, the springs are compressed, generating continuous and uniform elastic pressure. This design allows the clamping force to be flexibly transferred to the pressure plate and further evenly distributed to all load components to be welded through the support plate. This flexible clamping mechanism effectively absorbs minor dimensional deviations that may exist in the parts and tooling themselves, avoiding deformation caused by uneven force or excessive local stress on the parts due to rigid clamping. At the same time, this constant clamping force can reliably maintain close contact and stable positioning of all parts throughout the entire welding thermal cycle, effectively preventing minor displacements caused by thermal expansion and contraction or vibration, thereby ensuring the accuracy of the welding position and the uniformity of the weld quality.
[0013] Furthermore, the shape of the first positioning hole matches the contour of the load seat to restrict its horizontal movement.
[0014] By adopting the above technical solution, and by setting the shape of the first positioning hole on the pressure plate to precisely match the outer contour of the load holder, all radial movement in the circumferential direction or at a specific angle is effectively restricted when the load holder is embedded in the hole, thereby achieving a tight positioning with no or minimal gap. This contour-matching positioning method not only completely prevents the load holder from translating in any direction in the horizontal plane, but more importantly, it eliminates the possibility of it rotating slightly within the hole. This ensures extremely high angular orientation consistency and radial coaxiality between multiple load holders and between each load holder and the coaxial load cap and load. This precise positioning provides a crucial mechanical foundation for the RF load assembly to achieve stable and excellent axial symmetry electrical performance after welding.
[0015] Furthermore, the shape of the second positioning hole matches the contour of the load cap to restrict its horizontal movement.
[0016] By employing the above technical solution, and precisely matching the shape of the second positioning hole on the base plate with the contour of the load cap, when the load cap is placed inside the hole, its outer surface forms a surface contact constraint with the hole wall, thus completely limiting its position in all directions in the horizontal plane. This contour-matching positioning method not only eliminates the translational freedom of the load cap within the hole, but more importantly, ensures a strict coaxial relationship between the load cap, the load above, and the load seat. This precise radial constraint ensures that the electrical center axis of all load components remains consistent after welding, fundamentally avoiding the problem of discontinuity in RF signal transmission caused by load cap eccentricity or tilt, and providing a crucial structural guarantee for obtaining stable and excellent voltage standing wave ratio performance.
[0017] In summary, this application includes the following beneficial technical effects: The entire process, through the organic combination of three-layer plate collaborative positioning, contour matching hole positions, precise alignment of positioning pins, and flexible clamping, not only achieves rapid clamping and non-destructive demolding of batch components, but more importantly, it completely eliminates the cumulative errors of parts in the radial, axial, and angular directions from the mechanical structure, so that the key dimensions of the welded finished products are strictly controlled within the tolerance range. Ultimately, by ensuring the accuracy and consistency of the physical structure, it directly translates into stable and excellent voltage standing wave ratio parameters of the RF load components, while significantly improving production efficiency and product qualification rate. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure in the embodiment; Figure 2 This is a schematic diagram of the overall structure of the load component in the embodiment; Figure 3 This is a schematic diagram of the support plate structure in the embodiment.
[0019] Reference numerals in the attached diagram: 1. Pressure plate; 2. Base plate; 3. Support plate; 4. Locating pin; 5. Clamping screw; 6. Spring; 7. Load cap; 71. Load; 72. Load seat. Detailed Implementation
[0020] The present application will be further described in detail below with reference to the accompanying drawings.
[0021] Example, refer to Figures 1-3 A radio frequency load welding fixture includes a pressure plate 1, a support plate 3, a base plate 2 and a clamping assembly arranged sequentially from top to bottom; the pressure plate 1 is provided with a first positioning hole for positioning a load seat 72; the base plate 2 is provided with a second positioning hole for positioning a load cap 7; the support plate 3 is disposed between the pressure plate 1 and the base plate 2, and is used to position the load 71 and limit the axial distance between the load cap 7 and the load seat 72. By employing a three-layer structure consisting of a pressure plate 1, a support plate 3, and a base plate 2 arranged sequentially from top to bottom, and by using the first positioning hole on the pressure plate 1 to restrict the horizontal movement of the load seat 72 and the second positioning hole on the base plate 2 to restrict the horizontal movement of the load cap 7, while using the support plate 3 in the middle to position the load 71 and precisely limit the axial assembly distance between the load cap 7 and the load seat 72, the relative position and coaxiality of the load cap 7, the load 71, and the load seat 72 are coordinated and controlled. This coordinated control mechanism ensures that the welded RF load 71 assembly can be stably maintained within a precise tolerance range in key assembly dimensions, thereby guaranteeing the stability of RF signal transmission from a physical structure perspective. Ultimately, this directly results in the welded RF load 71 assembly having excellent and consistent voltage standing wave ratio performance.
[0022] In this embodiment, the support plate 3 is a separable structure that can be separated laterally. By designing the support plate 3 as a laterally separable structure, after welding, the operator does not need to forcibly push or pull the entire load 71 assembly out of the base plate 2 or pressure plate 1. Instead, the operator can simply move the support plate 3 laterally, thereby directly and without damage releasing the radial constraint on the welded assembly, achieving convenient and efficient unloading of the welded product. This design completely avoids the risk of stress on precision welded parts caused by forced disassembly during the unloading process, leading to weld cracking or part displacement. While ensuring high-precision welding results, it greatly improves the ease of use of the tooling and the production rhythm.
[0023] In this embodiment, the pressure plate 1, support plate 3, and base plate 2 are connected and fixed by positioning pins 4. By setting positioning pins 4 to align and fix the pressure plate 1, support plate 3, and base plate 2, it is ensured that all positioning holes on the three-layer structure can maintain a precise and unique relative positional relationship during each clamping and pressing process, thereby completely eliminating the risk of misalignment caused by accumulated manufacturing errors or sliding displacement between the plates.
[0024] In this embodiment, the clamping assembly includes a clamping screw 5 and a spring 6 sleeved on the outside of the clamping screw 5, used to provide downward clamping force to the pressure plate 1 during the welding process. By employing a clamping screw 5 with a spring 6 sleeved on it, the spring 6 is compressed during tightening, generating continuous and uniform elastic pressure. This design allows the clamping force to be flexibly transmitted to the pressure plate 1 and further evenly distributed to all the load 71 components to be welded via the support plate 3. This flexible clamping mechanism effectively absorbs minor dimensional deviations that may exist in the parts and tooling themselves, avoiding deformation caused by uneven force distribution or excessive local stress due to rigid clamping. Simultaneously, this constant clamping force reliably maintains close contact and stable positioning of all parts throughout the entire welding thermal cycle, effectively preventing minor displacements caused by thermal expansion and contraction or vibration, thereby ensuring the accuracy of the welding position and the uniformity of the weld quality.
[0025] The shape of the first positioning hole matches the contour of the load seat 72 to restrict its horizontal movement. By setting the shape of the first positioning hole on the pressure plate 1 to precisely match the outer contour of the load seat 72, all radial movement of the load seat 72 in the circumferential direction or at a specific angle is effectively restricted when it is embedded in the hole, thereby achieving a tight positioning with no or minimal gap. This contour-matching positioning method not only completely prevents the load seat 72 from translating in any direction in the horizontal plane, but more importantly, it eliminates the possibility of it rotating slightly within the hole, ensuring extremely high angular orientation consistency and radial coaxiality between multiple load seats 72 and between each load seat 72 and the coaxial load cap 7 and load 71. This precise positioning provides a crucial mechanical foundation for the stable and excellent axially symmetrical electrical performance of the RF load 71 assembly after welding.
[0026] The shape of the second positioning hole matches the contour of the load cap 7 to restrict its horizontal movement. By precisely matching the shape of the second positioning hole on the base plate 2 with the contour of the load cap 7, when the load cap 7 is placed in the hole, its outer surface forms a surface contact constraint with the hole wall, thus completely limiting its position in all directions in the horizontal plane. This contour-matching positioning method not only eliminates the translational freedom of the load cap 7 within the hole, but more importantly, ensures that the load cap 7 maintains a strict coaxial relationship with the upper load 71 and load seat 72. This precise radial constraint ensures that the electrical center axis of all load 71 components remains consistent after welding, fundamentally avoiding the problem of discontinuity in radio frequency signal transmission caused by the eccentricity or tilt of the load cap 7, and providing a key structural guarantee for obtaining stable and excellent voltage standing wave ratio performance.
[0027] Specific implementation process: In use, firstly, multiple load caps 7 are precisely embedded into the second positioning holes of the base plate 2 to achieve complete radial limiting. Then, the laterally separable support plate 3 is covered and precisely positioned with the base plate 2 by the positioning pin 4. At this time, the thickness of the support plate 3 has been preset to the axial assembly distance between the load caps 7 and the load seat 72. Next, the loads 71 are placed one by one in the corresponding positioning structure of the support plate 3. Then, the load seat 72 is pressed into the first positioning hole of the pressure plate 1 so that its outline fits tightly with the hole wall to eliminate horizontal movement and rotational freedom. After that, the pressure plate 1 is aligned with the lower structure by the positioning pin 4, and a flexible clamping force is applied by the clamping screw 5 with spring 6 so that the three-layer structure and all parts maintain constant pressure and precise position during the welding process. At this time, the load caps 7, loads 71 and load seats 72 have formed a strict coaxial constraint system in three-dimensional space. After welding is completed, the constraint on the forming component can be released without damage simply by moving the support plate 3 laterally, achieving efficient unloading.
[0028] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A radio frequency load welding fixture, characterized in that, include: The components arranged from top to bottom are: pressure plate (1), support plate (3), base plate (2), and clamping assembly; The pressure plate (1) is provided with a first positioning hole for positioning the load seat (72); The base plate (2) is provided with a second positioning hole for positioning the load cap (7); The support plate (3) is disposed between the pressure plate (1) and the base plate (2) to position the load (71) and limit the axial distance between the load cap (7) and the load seat (72).
2. The RF load welding fixture according to claim 1, characterized in that, The support plate (3) is a separable structure, and the support plate (3) can be separated laterally.
3. The RF load welding fixture according to claim 2, characterized in that, The pressure plate (1), support plate (3) and base plate (2) are aligned and fixed by positioning pins (4).
4. The RF load welding fixture according to claim 1, characterized in that, The clamping assembly includes a clamping screw (5) and a spring (6) sleeved on the outside of the clamping screw (5) for providing a downward clamping force to the pressure plate (1) during the welding process.
5. The RF load welding fixture according to claim 1, characterized in that, The shape of the first positioning hole matches the contour of the load seat (72) to limit its horizontal movement.
6. The RF load welding fixture according to claim 5, characterized in that, The shape of the second positioning hole matches the contour of the load cap (7) to restrict its horizontal movement.