A high-precision stud welding limiting carrier

Abstract

This utility model discloses a high-precision stud welding limiting carrier, including a placement frame. The top inner side of the placement frame is recessed to form a placement groove for placing a PCB board. A positioning component is installed in the placement groove. The top of the positioning component is provided with a first positioning post that mates with a mechanical hole on the PCB board and a second positioning post that mates with a stud insertion hole on the PCB board. This utility model effectively solves the problem of studs easily shifting after reflow soldering through a precisely designed positioning structure, significantly improving welding accuracy and assembly reliability.

Description

Technical Field

[0001] This utility model relates to the field of SMT reflow soldering technology, specifically to a high-precision stud welding limiting carrier. Background Technology

[0002] With the continued booming development of the semiconductor application industry, especially the rapid iteration of 5G communication technology and the increasing complexity of large server electronic motherboard product design, PCB (printed circuit board) layout design is facing unprecedented challenges. Specifically, due to the demand for product miniaturization and increased integration, the component layout space on the PCB motherboard has become extremely limited, often making it difficult to directly meet the layout requirements of various external combination boards (such as functional expansion boards, special interface boards, etc.).

[0003] To resolve the aforementioned layout conflicts and achieve effective connection and adaptation between different functional modules, the design often requires the introduction of interface components, such as adapter boards, SSD (solid-state drive) card slots, SIM communication card slots, and antenna mounts, which are then mechanically positioned and secured using studs. These components are fixed to the PCB using a stud through-hole reflow soldering process to ensure their stability and accuracy during subsequent assembly.

[0004] However, in practical applications, due to considerations such as ease of assembly and prevention of PCB deformation caused by thermal stress during soldering, the diameter of the insertion hole (e.g., 3.3mm) reserved for the stud in the PCB design is often larger than the diameter of the surface of the stud to be soldered (e.g., 3mm). Since the stud is a hand-positioned part and the incoming material is loose, it is impossible to place it completely in the center position by hand. This makes it easy for the stud to shift off-site after reflow soldering, affecting the assembly accuracy and requiring a lot of time for rework and repair. Utility Model Content

[0005] The purpose of this invention is to provide a high-precision stud welding limiting carrier to solve the problem in the prior art that studs are prone to displacement after reflow welding, resulting in decreased assembly accuracy and increased rework and repair costs.

[0006] The technical solution of this utility model is as follows: A high-precision stud welding limiting carrier includes a placement frame, the top inner side of which is recessed to form a placement groove for placing a PCB board. A positioning component is installed in the placement groove. The top of the positioning component is provided with a first positioning post that mates with a mechanical hole on the PCB board and a second positioning post that mates with a stud insertion hole on the PCB board.

[0007] As a preferred embodiment of this utility model, the diameter of the first positioning post is 0.1 mm smaller than the diameter of the mechanical hole, and the diameter of the second positioning post is 0.1 mm smaller than the diameter of the threaded hole at the bottom of the stud.

[0008] In a preferred embodiment of this utility model, the top surface of the positioning carrier is flush with the bottom of the placement groove, and the bottom surface of the positioning carrier is flush with the bottom surface of the placement frame.

[0009] As a preferred embodiment of this utility model, the bottom inner side of the placement frame is provided with an installation limiting groove that cooperates with the positioning component.

[0010] As a preferred embodiment of this utility model, the positioning carrier is fixed in the mounting limiting groove by screws.

[0011] As a preferred embodiment of this utility model, a first screw hole is provided on the top surface of the placement frame, which is directly opposite the mounting limiting groove, and a second screw hole is provided on the positioning component, which matches the first screw hole.

[0012] As a preferred embodiment of this utility model, the top of the positioning carrier is provided with a clearance groove to avoid the components on the back of the PCB board.

[0013] As a preferred embodiment of this utility model, the placement slot is provided with pick-up and put-down slots on both sides opposite to the placement slot.

[0014] As a preferred embodiment of this utility model, the four corners of the placement groove are provided with inner R angles.

[0015] In a preferred embodiment of this utility model, both the placement frame and the positioning carrier are made of synthetic stone.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: The high-precision stud welding limiting carrier provided by this utility model effectively solves the problem of studs easily shifting after reflow welding through a precisely designed positioning structure, significantly improving welding accuracy and assembly reliability. At the same time, the carrier is lightweight and flexible, easy to operate, and can meet the positioning requirements of PCB boards and studs of different sizes, thereby ensuring the accurate assembly of the outer plate, greatly reducing manual maintenance and rework costs, and improving production efficiency and product quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a top view of a high-precision stud welding limiting carrier in one embodiment of the present invention; Figure 2 This is a bottom view of a high-precision stud welding limiting carrier in one embodiment of the present invention; Figure 3 This is a top view of the frame placement in one embodiment of the present invention; Figure 4 This is a bottom view of the frame placement in one embodiment of the present invention; Figure 5 This is a top view of the positioning carrier in one embodiment of the present invention; Figure 6 This is a bottom view of the positioning carrier in one embodiment of the present invention.

[0019] In the diagram, 1. Placement frame; 11. Placement slot; 111. Pick-up and drop slot; 112. Inner radius; 12. Installation limit slot; 13. First screw hole; 2. Positioning component; 21. First positioning post; 22. Second positioning post; 23. Second screw hole; 24. Clearance slot; 3. Screw. Detailed Implementation

[0020] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. It is also declared that the embodiments described below are only for explaining this utility model and are not intended to limit this utility model.

[0021] It should be noted that the terms "installation," "setting," "connection," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Indications of orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used in the application's product, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component 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 application. The terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features.

[0022] Please see Figures 1 to 6 This utility model provides a high-precision stud welding limiting carrier, including a placement frame 1. The top inner side of the placement frame 1 is recessed to form a placement groove 11 for placing a PCB board, providing a stable placement space for the PCB board. A positioning carrier 2 is installed in the placement groove 11. The top surface of the positioning carrier 2 is flush with the bottom of the placement groove 11, and the bottom surface of the positioning carrier 2 is flush with the bottom surface of the placement frame 1, ensuring a tight fit between the positioning carrier 2 and the placement frame 1 and improving the overall structural stability. Simultaneously, the top of the positioning carrier 2 is provided with a first positioning post 21 that mates with a mechanical hole on the PCB board and a second positioning post 22 that mates with a stud insertion hole on the PCB board, providing reliable support for the precise positioning of the stud and the PCB board. The number and specific positions of the first positioning post 21 and the second positioning post 22 are determined according to the number and specific positions of the mechanical holes and stud insertion holes on the PCB board. The diameter of the first positioning post 21 is 0.1 mm smaller than the diameter of the mechanical hole, and the diameter of the second positioning post 22 is 0.1 mm smaller than the diameter of the threaded hole at the bottom of the stud. This ensures that the first positioning post 21 can be smoothly inserted into the mechanical hole, and also achieves precise positioning of the PCB board through the tiny gap, preventing horizontal movement of the PCB board during the soldering process, thereby improving the soldering accuracy.

[0023] Instructions for use: Place the PCB board into the placement slot 11 of the placement frame 1, and accurately position the PCB board by the first positioning post 21 of the positioning carrier 2. Then, place the studs onto the second positioning post 22 of the positioning carrier 2 by hand or by picking them up from the pick-and-place machine. Finally, place the carrier and the PCB board with the studs assembled together into the reflow oven for soldering.

[0024] Please see Figure 4 In one embodiment, the bottom inner side of the placement frame 1 is provided with an installation limiting groove 12 that mates with the positioning carrier 2. The installation limiting groove 12 significantly improves the installation accuracy and stability of the positioning carrier 2. This structure ensures that the positioning carrier 2 will not shift or loosen during the welding process through physical limiting, thereby providing continuous and precise positioning support for the PCB board and studs.

[0025] Please see Figures 1 to 6In one embodiment, the positioning carrier 2 is fixed in the mounting limiting groove 12 by screws 3. Specifically, a first screw hole 13 is provided on the top surface of the placement frame 1, directly opposite the mounting limiting groove 12, and a second screw hole 23 is provided on the positioning carrier 2 to match the first screw hole 13. By using the screws 3 for fixing, the positioning carrier 2 can be quickly replaced for different PCB board sizes, mechanical holes, and stud insertion hole positions, enabling a single carrier to adapt to the production of multiple types of products, significantly enhancing its versatility. At the same time, the screw 3 fixing structure facilitates disassembly and replacement. When the positioning carrier 2 wears out due to long-term use or needs to be adapted to new PCB specifications, operators can quickly complete the component replacement, reducing downtime and improving overall production efficiency.

[0026] Please see Figure 1 , Figure 5 In one embodiment, the top of the positioning carrier 2 is provided with a clearance groove 24 to avoid components on the back of the PCB board. The clearance groove 24 effectively solves the interference problem between protruding components (such as capacitors, chips, etc.) on the back of the PCB board and the positioning carrier 2, enabling the carrier to adapt to more complex PCB board layouts and expanding the application range of the equipment. At the same time, by reserving space for the back components, the clearance groove 24 ensures that the PCB board can be smoothly placed into the placement slot 11, avoiding board deformation or component damage caused by physical collisions, while ensuring the flatness of the front soldering area, providing a basic condition for high-precision soldering.

[0027] Please see Figure 1 , Figure 3 In one embodiment, pick-and-place slots 111 are provided on opposite sides of the placement slot 11. The pick-and-place slots 111 facilitate workers in removing PCB boards from the placement slots 11 of the carrier, simplifying the PCB board removal process. This is especially suitable for high-frequency, batch production scenarios and significantly shortens the single-piece operation time.

[0028] Please see Figure 1 , Figure 3 In one embodiment, the four corners of the placement slot 11 are provided with inner R-angles 112. The inner R-angles 112 make it easier for the PCB board to be placed into the PCB board placement slot 11, reduce the hard contact between the edges of the PCB board and the placement slot 11, reduce the risk of scratches and chipping of the board edges caused by friction or collision, thereby improving product yield and appearance quality.

[0029] In one embodiment, both the frame 1 and the positioning carrier 2 are made of synthetic stone. Synthetic stone has a low coefficient of thermal expansion and high temperature resistance, maintaining dimensional stability under the high temperatures of reflow soldering (typically 240-260°C), preventing positioning post misalignment due to thermal deformation, thus ensuring stud welding accuracy. Simultaneously, synthetic stone is an electrically insulating material, effectively avoiding the risk of static electricity or short circuits during welding, making it particularly suitable for precision welding of high-density electronic components. Furthermore, synthetic stone has a lower density than metals, reducing the weight of the carrier while maintaining structural strength, facilitating worker operation and automated equipment handling, further improving production efficiency.

[0030] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

[0031] The present utility model patent has been described above with reference to the accompanying drawings. Obviously, the implementation of the present utility model patent is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present utility model patent, or the direct application of the inventive concept and technical solution of the present utility model patent to other occasions without modification, are all within the protection scope of the present utility model.

Claims

1. A high-precision stud welding limiting carrier, characterized in that, The device includes a placement frame, the top inner side of which is recessed to form a placement groove for placing a PCB board. A positioning component is installed in the placement groove. The top of the positioning component is provided with a first positioning post that mates with a mechanical hole on the PCB board and a second positioning post that mates with a stud insertion hole on the PCB board.

2. The high-precision stud welding limiting carrier according to claim 1, characterized in that, The diameter of the first positioning post is 0.1 mm smaller than the diameter of the mechanical hole, and the diameter of the second positioning post is 0.1 mm smaller than the diameter of the threaded hole at the bottom of the stud.

3. The high-precision stud welding limiting carrier according to claim 1, characterized in that, The top surface of the positioning carrier is flush with the bottom of the placement groove, and the bottom surface of the positioning carrier is flush with the bottom surface of the placement frame.

4. The high-precision stud welding limiting carrier according to claim 1, characterized in that, The bottom inner side of the placement frame is provided with an installation limiting groove that cooperates with the positioning component.

5. The high-precision stud welding limiting carrier according to claim 4, characterized in that, The positioning carrier is fixed in the mounting limiting groove by screws.

6. The high-precision stud welding limiting carrier according to claim 5, characterized in that, The top surface of the placement frame is provided with a first screw hole at the position opposite the installation limiting groove, and the positioning component is provided with a second screw hole that matches the first screw hole.

7. The high-precision stud welding limiting carrier according to claim 1, characterized in that, The top of the positioning carrier is provided with a clearance groove to avoid the components on the back of the PCB board.

8. The high-precision stud welding limiting carrier according to claim 1, characterized in that, The placement slot is provided with pick-up and drop slots on both sides opposite to the placement slot.

9. The high-precision stud welding limiting carrier according to claim 1, characterized in that, The four corners of the placement slot are all provided with inner radius (R-angle).

10. The high-precision stud welding limiting carrier according to claim 1, characterized in that, Both the placement frame and the positioning carrier are made of synthetic stone.

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