Filter PCBA (Printed Circuit Board Assembly) guide pin limiting, assembling and welding tool
By designing a columnar tooling body and a limiting assembly welding tooling with a specific aperture, the problem of difficult positioning of filter PCBA pins was solved, achieving an efficient and stable welding process and improving the production efficiency of filter PCBAs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI ZHONGKE TIANDI AVIATION MODULE
- Filing Date
- 2025-05-15
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional filter PCBA pin assembly and soldering is difficult to position, resulting in low first-pass yield, low efficiency, and the need for multiple reworks.
Design a limiting assembly welding fixture including a columnar fixture body. The fixture has specific holes and grooves for fixing the pins and PCBA boards, so that the pins are welded vertically and the PCBA is placed horizontally.
This technology enables vertical soldering of pins to PCBA boards, improving soldering consistency and efficiency, reducing operational errors, avoiding rework, and increasing production efficiency.
Smart Images
Figure CN224222913U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of filter assembly and welding technology, specifically relating to a filter PCBA pin limiting assembly and welding application. Background Technology
[0002] During the assembly and soldering process of the filter, a fixture is needed to limit and fix the pins before horizontally inserting the PCBA board onto the pin soldering end to ensure that the pins are perpendicular to the PCBA board after soldering. Process engineers use traditional bare PCB fabrication to create assembly and soldering fixtures, but due to errors in the pin mounting holes, the pins tend to tilt after soldering to the PCBA board. This requires rework of the tilted pins, resulting in a low first-pass yield and significant time consumption.
[0003] In summary, there is an urgent need to research an assembly welding fixture that is easy to position and highly efficient for welding. Utility Model Content
[0004] The purpose of this invention is to provide a filter PCBA pin limiting assembly welding fixture to solve the problems of difficult positioning and low efficiency in traditional filter PCBA pin assembly welding.
[0005] The technical solution of this utility model to solve the above-mentioned assembly and welding problems is as follows:
[0006] A filter PCBA pin limiting assembly welding fixture includes a columnar fixture body, the upper surface of which is the fixture welding surface;
[0007] The tooling welding surface is milled with a groove; on the tooling welding surface, two first pin insertion through holes are symmetrically opened at the left end of the groove along the length direction, and three second pin insertion through holes are evenly opened from top to bottom at the right end of the groove along the length direction. The first pin insertion through holes and the second pin insertion through holes are both circular through holes with the same size.
[0008] One end of the five pins to be assembled is provided with a limiting frustum to ensure that the five pins are respectively perpendicularly inserted into the first pin insertion through hole and the second pin insertion through hole and then limited to the upper surface of the first pin insertion through hole and the second pin insertion through hole, thereby ensuring that the end of the pin to be welded is placed vertically on the tooling welding surface.
[0009] The PCBA to be assembled is slightly smaller than the tooling soldering surface. There are four first solder joints on the top and bottom sides of the first component to be soldered on the PCBA, and two second components to be soldered on the right side of the first component, with four second solder joints at their ends. When the PCBA is assembled on the tooling soldering surface, the first and second components, as well as their first and second solder joints, are suspended in the groove to ensure that the PCBA can be placed horizontally and stably on the tooling soldering surface. The ends of the five pins to be soldered extend vertically from the five through holes to be soldered on the PCBA. The positions of the five through holes to be soldered correspond one-to-one with the two first pin through holes and the three second pin through holes.
[0010] This utility model also includes the following other technical solutions:
[0011] The main body of the tooling has external dimensions of 28×20×21mm; the welding surface of the tooling has dimensions of 28mm*20mm; and the tank has dimensions of 17.4mm*16.5mm*4mm.
[0012] The diameter of the cross-sectional circle of the first pin insertion through hole and the second pin insertion through hole is 1.1 mm, and the depth is 21 mm.
[0013] The guide pin has a diameter of 1 mm and a length of 23 mm. The limiting frustum is located 2.8 mm from one end of the guide pin, and the limiting frustum has a cross-sectional diameter of 1.8 mm and a height of 0.55 mm.
[0014] The PCBA has external dimensions of 26.7mm*18.05mm.
[0015] The first component is a common-mode inductor, and the second component is a capacitor.
[0016] Compared with existing PCB bare board tooling, the tooling of this utility model has the following advantages:
[0017] When using this fixture for welding, first insert the five pins to be welded through the five first and second pin insertion holes of the fixture. The end of the pin to be welded is limited on the welding surface of the fixture by a limiting frustum. The entire pin remains perpendicular to the welding surface of the fixture. Then, according to the positions of the five pin insertion holes on the PCBA, align the PCBA with the pin ends limited on the welding surface of the fixture and insert them flat. Finally, perform the welding operation between the pins and the PCBA. This filter PCBA pin assembly and welding fixture has the advantages of easy structure implementation, low cost, durability, and low wear. It realizes the design concept of simple placement and removal of the pins to be welded and the filter PCBA, simplifies the welding steps of the filter PCBA pins, improves the production efficiency of the filter PCBA, and at the same time reduces human operation errors and difficulty, avoiding multiple rework. Using this fixture improves the welding consistency of filter pins and ensures the welding quality of filter pins. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the filter PCBA pin limiting assembly welding fixture of this utility model.
[0019] Figure 2 This is a cross-sectional view of AA. Detailed Implementation
[0020] To facilitate understanding of this application, a more comprehensive description of this application will be provided below with reference to the accompanying drawings.
[0021] The filter PCBA pin limiting assembly and welding fixture of this utility model is a single fixture. Five first and second pin insertion through holes are milled on the periphery of the fixture according to the positions of the five pin insertion through holes to be welded on the PCBA. These holes are used to insert the pins and limit and fix the pin ends. Then, according to the position and height of the PCBA components, a groove is milled in the middle of the fixture cavity to ensure that the components assembled on the PCBA can be suspended in the air. This achieves the purpose of placing the PCBA horizontally on the welding surface of the fixture, so as to achieve a flat and close fit between the PCBA pin insertion through holes and the pin end welding parts, thus meeting the welding requirements.
[0022] Example
[0023] The filter PCBA pin limiting assembly welding fixture provided in this embodiment includes a columnar fixture body 1, which is made of FR-4 glass fiber and has an external dimension of 28×20×21mm; the upper surface of the fixture body 1 is the fixture welding surface 3, which has a size of 28mm*20mm.
[0024] The tooling welding surface 3 is milled with a groove 6, the size of which is 17.4mm*16.5mm*4mm; two first pin insertion through holes 4 are symmetrically opened at the left end of the groove 6 along the length direction on the tooling welding surface 3, and three second pin insertion through holes 9 are evenly opened from top to bottom at the right end of the groove 6 along the length direction. The first pin insertion through holes 4 and the second pin insertion through holes 9 are both circular through holes with the same size, the diameter of the cross-section circle is 1.1mm and the depth is 21mm.
[0025] The five pins 11 to be assembled are 1mm in diameter and 23mm in length. One end of each pin is designed with a limiting frustum with a cross-sectional diameter of 1.8mm and a height of 0.55mm at a distance of 2.8mm from the end of the pin. This ensures that the five pins 11 are perpendicularly inserted into the first pin insertion through hole 4 and the second pin insertion through hole 9, respectively, and are then limited to the upper surfaces of the first pin insertion through hole 4 and the second pin insertion through hole 9. This ensures that the end of the pin 11 to be welded is placed perpendicularly on the tooling welding surface 3.
[0026] The PCBA2 to be assembled has an external dimension of 26.7mm*18.05mm, which is slightly smaller than the tooling welding surface 3. The first component 5 soldered on the PCBA2 has a total of 4 first solder joints 7 on the upper and lower sides, and there are two second components 8 soldered on the upper and lower right sides of the first component 5, with a total of 4 second solder joints 10 at their ends. When the PCBA2 is assembled on the tooling welding surface 3, the first component 5 and the second component 8, as well as their first solder joints 7 and second solder joints 10, are suspended in the groove 6 to ensure that the PCBA2 can be placed horizontally and stably on the tooling welding surface 3. The ends of the 5 pins 11 to be soldered extend vertically from the 5 through holes 12 to be soldered on the PCBA2. The 5 through holes 12 to be soldered correspond one-to-one with the positions of the first pin through holes 4 and the second pin through holes 9.
[0027] Specifically, in this embodiment, the first component 5 is a common-mode inductor, and the second component 8 is a capacitor.
[0028] The operation procedure for soldering the PCBA using the filter PCBA assembly and soldering fixture of this utility model is as follows:
[0029] Step 1: Take five pins 11 to be assembled and welded, and insert them into the two first pin insertion through holes 4 and the three second pin insertion through holes 9 on the main body of the tooling. The end of the pin 11 to be welded is limited on the welding surface 3 of the tooling, and the pin 11 is perpendicular to the welding surface 3 of the tooling.
[0030] Step 2: Take the PCBA2 to be assembled and soldered, with the soldering surface facing upwards. Align the five pin insertion holes 12 of the PCBA2 with the ends of the pins 11 to be soldered on the upper limit of the soldering surface 3 of the fixture. After confirming that they are aligned, insert the PCBA2 onto the soldering surface 3 of the fixture. Visually inspect that the five pin insertion holes 12 on the PCBA2 board surface are flush with the ends of the pins 11 to be soldered. This completes the pre-soldering operation between the PCBA2 and the filter pins 11.
[0031] Step 3: Hold the soldering iron and solder the ends of the five pins 11 to be soldered to the five pin insertion holes 12 of the PCBA2 in sequence. After the soldering is completed and the soldering is checked to ensure that the requirements are met, remove the PCBA to complete the operation.
[0032] The structure of this utility model is easy to implement, and the use of tooling improves work efficiency and welding quality stability.
[0033] All techniques and terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this invention and in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.
[0034] While preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.
[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A filter PCBA pin limiting assembly welding fixture, comprising a columnar fixture body (1), characterized in that, The upper surface of the tooling body (1) is the tooling welding surface (3); The tooling welding surface (3) is milled with a groove (6); two first pin insertion through holes (4) are symmetrically opened at the left end of the groove (6) along the length direction of the tooling welding surface (3), and three second pin insertion through holes (9) are evenly opened from top to bottom at the right end of the groove (6) along the length direction of the tooling welding surface (3). The first pin insertion through holes (4) and the second pin insertion through holes (9) are both circular through holes and have the same size. One end of the five pins (11) to be assembled is provided with a limiting frustum to ensure that the five pins (11) are respectively perpendicularly inserted into the first pin insertion through hole (4) and the second pin insertion through hole (9) and then limited to the upper surface of the first pin insertion through hole (4) and the second pin insertion through hole (9), thereby ensuring that the end of the pin (11) to be welded is perpendicularly placed on the tooling welding surface (3); The PCBA (2) to be assembled is slightly smaller than the tooling welding surface (3); the first component (5) welded on the PCBA (2) has four first solder joints (7) on its upper and lower sides, and two second components (8) welded on the right side of the first component (5) have four second solder joints (10) at their ends; when the PCBA (2) is assembled on the tooling welding surface (3), the first component (5) and the second component (8) and their first solder joints (7) and second solder joints (10) are suspended in the groove (6) to ensure that the PCBA (2) can be placed horizontally and stably on the tooling welding surface (3), and the ends of the five pins (11) to be welded extend vertically from the five insertion through holes (12) to be welded on the PCBA (2), and the five insertion through holes (12) to be welded correspond one-to-one with the positions of the two first pin insertion through holes (4) and the three second pin insertion through holes (9).
2. The filter PCBA pin limiting assembly welding fixture as described in claim 1, characterized in that, The main body (1) of the tooling has an external dimension of 28×20×21mm; the welding surface (3) of the tooling has a dimension of 28mm*20mm; and the tank (6) has a dimension of 17.4mm*16.5mm*4mm.
3. The filter PCBA pin limiting assembly welding fixture as described in claim 1, characterized in that, The diameter of the cross-sectional circle of the first pin insertion through hole (4) and the second pin insertion through hole (9) is 1.1 mm, and the depth is 21 mm.
4. The filter PCBA pin limiting assembly welding fixture as described in claim 1, characterized in that, The guide pin (11) has a diameter of 1 mm and a length of 23 mm. The limiting frustum is located 2.8 mm from one end of the guide pin (11), and the cross-sectional diameter of the limiting frustum is 1.8 mm and the height is 0.55 mm.
5. The filter PCBA pin limiting assembly welding fixture as described in claim 1, characterized in that, The PCBA (2) has external dimensions of 26.7mm*18.05mm.
6. The filter PCBA pin limiting assembly welding fixture as described in claim 1, characterized in that, The first component (5) is a common-mode inductor, and the second component (8) is a capacitor.