A PCB hole burr repairing jig

Abstract

A kind of PCB hole burr repair tool, including support plate, first fixed plate, multiple connecting columns, second fixed plate, multiple repair needles and multiple spring columns;First fixed plate is installed on the top of support plate and is equipped with multiple connecting holes;Two ends of each connecting column are connected with first fixed plate and second fixed plate respectively;Second fixed plate is equipped with multiple avoiding holes and multiple limit holes corresponding with connecting hole;The bottom end of repair needle is installed in connecting hole, and the top end extends out of second fixed plate through limit hole, the cross-sectional dimension of repair needle is not greater than the burr hole to be repaired, and its outer side wall is limited with the inner side wall of limit hole;The bottom end of each spring column is installed in support plate or first fixed plate, and the top end of spring column is equipped with the positioning part matched with PCB, and the distance between the connecting position of positioning part and PCB and second fixed plate is greater than the compression distance of positioning part in repair process.Compared with prior art, the repair tool is simple in structure, and burr debris pollution of PCB can be avoided simultaneously.

Description

Technical Field

[0001] This utility model belongs to the technical field of burr repair fixtures, specifically relating to a burr repair fixture for holes in PCB boards. Background Technology

[0002] During the drilling process of multilayer thick copper PCBs, the problem of burrs and flash around the holes is difficult to eliminate due to factors such as the total copper thickness, the number of stacked boards, the quality of the drill bit, the spindle speed of the drill, and the effect of post-drilling burr grinding. If small burrs appear around the holes, they will increase in size during subsequent processes such as copper plating, electroplating, and tin plating, leading to problems with hole diameter detection during finished product inspection.

[0003] Currently, when removing burrs, each hole needs to be checked one by one using a hole inspection device before repair, resulting in low repair efficiency. To improve repair efficiency, PCB board hole burr repair fixtures have emerged, such as the hole burr removal fixture based on a PCB test fixture provided in application number 201811192534.3. This fixture uses corresponding fixtures for different PCB board models, and repairs burrs inside PCB board holes in one go using the grinding rod on the fixture. However, during the burr repair process, burrs fall onto the lower plate of the fixture, and the PCB board is pressed down to contact the lower plate of the fixture. Burr debris on the lower plate of the fixture easily sticks to the bottom surface of the PCB board, affecting the quality of the PCB board. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a PCB board hole burr repair fixture.

[0005] To achieve the above objectives, this utility model discloses a PCB board hole burr repair fixture, including a support plate, a first fixing plate, a connecting post, a second fixing plate, a repair pin, and a spring post;

[0006] The first fixing plate is installed on the top of the support plate, and the first fixing plate is provided with multiple connection holes;

[0007] There are multiple connecting columns, each of which is arranged longitudinally and its two ends are respectively connected to the first fixing plate and the second fixing plate;

[0008] The second fixing plate is provided with multiple limiting holes and multiple clearance holes, and the multiple limiting holes are provided in a one-to-one correspondence with the multiple connecting holes;

[0009] There are multiple repair needles. The bottom end of each repair needle is installed in the connecting hole, and the top end of each repair needle extends out of the second fixing plate through the limiting hole. Its cross-sectional dimension is not greater than the cross-sectional dimension of the burr hole to be repaired. The outer side wall of the repair needle is limited and matched with the inner side wall of the limiting hole.

[0010] There are multiple spring pillars, and the bottom end of each spring pillar is installed on the support plate or the first fixing plate. The top end of the spring pillar is provided with a positioning part. The positioning part extends out of the second fixing plate through a corresponding clearance hole and is used to position and cooperate with the copper-free hole at the edge of the PCB board. The distance between the connection position of the positioning part and the PCB board and the second fixing plate is greater than the compression distance of the positioning part during the repair process.

[0011] In one embodiment, the tip cross-sectional dimension of the repair needle is smaller than the cross-sectional dimension of the burr hole to be repaired.

[0012] In another embodiment, the tip diameter of the repair needle is 0.05 mm to 0.1 mm smaller than the diameter of the burr hole to be repaired.

[0013] In another embodiment, each of the repair pins is clearance-fitted with a corresponding connecting hole and a limiting hole.

[0014] In another embodiment, the size of the limiting hole is equal to the size of the corresponding connecting hole, and the repair pin is cylindrical.

[0015] In another embodiment, each of the connecting holes extends through to the bottom surface of the first fixing plate to form a limiting groove, and the bottom of each repair pin is provided with a limiting part that cooperates with the corresponding limiting groove.

[0016] In another embodiment, the outer wall of the spring post is limited to the inner wall of the corresponding clearance hole.

[0017] In another embodiment, the connecting post is a screw post, and both the first fixing plate and the second fixing plate are connected to the connecting post by screws.

[0018] In another embodiment, the system also includes multiple columns, which are installed at the bottom of the support plate.

[0019] In another embodiment, the column is a screw column, with screws threaded through the first fixing plate and the support plate to the corresponding column.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] When repairing burrs, place the PCB board on the repair fixture, ensuring the copper-free holes at the edge of the PCB board align with the positioning pins. Simultaneously, insert each repair pin into its corresponding hole in the PCB board. Then, manually press down on the PCB board to force the repair pins through, thus removing the burrs from the holes and achieving the repair effect. After repair, release the PCB board, allowing it to return to its original position, and the worker can directly remove the repaired PCB board.

[0022] Because the distance between the connection point of the positioning part and the PCB board and the second fixing plate is greater than the compression distance of the positioning part during the repair process, burrs and debris falling onto the second fixing plate will basically not stick to the bottom surface of the PCB board, significantly alleviating the problem of PCB board contamination and improving the quality of the PCB board. The PCB board is directly positioned on multiple spring pillars, which reduces the structure supporting the PCB board compared to existing technologies, making the structure simpler. Attached Figure Description

[0023] Figure 1 A cross-sectional view of the PCB board hole burr repair fixture as an example;

[0024] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0025] Figure 3 for Figure 1 A magnified view of a portion of point B in the middle;

[0026] Figure 4 This is a schematic diagram of another connection structure between the repair pin and the second fixing plate;

[0027] Support plate 10;

[0028] First fixing plate 20; connecting hole 21; limiting groove 22;

[0029] Connecting post 30;

[0030] Second fixing plate 40; limiting hole 41; clearance hole 42;

[0031] Repair needle 50; limiting part 51;

[0032] Spring post 60; Positioning part 61;

[0033] Column 70. Detailed Implementation

[0034] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] A PCB board hole burr repair fixture, see [link / reference] Figures 1-4 It includes a support plate 10, a first fixing plate 20, a connecting column 30, a second fixing plate 40, a repair pin 50, and a spring column 60.

[0036] The support plate 10, the first fixing plate 20, and the second fixing plate 40 are rectangular plates with the same shape and dimensions. The first fixing plate 20 is fixed to the top of the support plate 10 with screws, and the first fixing plate 20 has multiple connecting holes 21. There are multiple connecting posts 30, each of which is arranged longitudinally and its two ends are respectively connected to the first fixing plate 20 and the second fixing plate 40. Specifically, the connecting posts 30 are screw posts, and there are four of them, which are located at the four corners of the first and second fixing plates 40, and are fixed by screws. The connecting posts 30 are respectively located at the corners of the fixing plates, and the overall structure is stable and reliable. The connecting posts 30 are preferably screw posts that are connected to the two fixing plates with screws, which is simple in structure and easy to assemble.

[0037] The second fixing plate 40 is provided with multiple limiting holes 41 and multiple clearance holes 42, with each limiting hole 41 corresponding to a different connecting hole 21. Multiple repair pins 50 are provided, with the bottom end of each pin 50 mounted in a connecting hole 21 and the top end of each pin 50 extending out of the second fixing plate 40 through a limiting hole 41. The cross-sectional dimension of each pin 50 is no larger than the cross-sectional dimension of the burr hole to be repaired, and it is used for burr repair. The outer wall of the repair pin 50 is fitted with the inner wall of the limiting hole 41, ensuring the rigidity of the pin 50. Multiple spring posts 60 are provided, the specific number of which can be configured according to the number of copper-free holes at the edge of the PCB board. The bottom end of each spring post 60 is fixed to the support plate 10 or the first fixing plate 20 by screws. The top end of each spring post 60 is provided with a positioning part 61. The positioning part 61 extends out of the second fixing plate 40 through a corresponding clearance hole 42 and is used to insert into the copper-free hole at the edge of the PCB board for positioning and engagement. The distance between the connection point of the positioning part 61 and the PCB board and the second fixing plate 40 is greater than the compression distance of the positioning part 61 during the repair process. As a result, burrs and debris falling on the second fixing plate 40 will not stick to the bottom surface of the PCB board, significantly alleviating the problem of PCB board contamination and improving the quality of the PCB board. The PCB board is directly positioned on multiple spring posts 60, which reduces the structure supporting the PCB board compared to existing technologies, making the structure simpler.

[0038] When repairing burrs, place the PCB board on the repair fixture, ensuring the copper-free holes at the edge of the PCB board align with the positioning pins. Simultaneously, insert each repair pin 50 into its corresponding hole on the PCB board. Then, manually press down on the PCB board to allow the repair pins 50 to penetrate through it, thereby removing the burrs from the holes and achieving the repair effect. After repair, release the PCB board, reposition it, and the worker can directly walk away from the repaired PCB board.

[0039] In this embodiment, the cross-sectional dimension of the tip of the repair needle 50 is smaller than the cross-sectional dimension of the burr hole to be repaired. In this way, when the PCB board is removed, the repair needle 50 will not obstruct the PCB board, and the PCB board can be removed smoothly.

[0040] Preferably, the tip diameter of the repair needle 50 is 0.05mm to 0.1mm smaller than the diameter of the burr hole to be repaired. This makes it easier to remove the PCB board and also ensures that the repair needle 50 can break the burr inside the hole, thus ensuring the repair effect.

[0041] In this embodiment, the number of connecting holes 21 in the first fixing plate 20 and the limiting holes 41 in the second fixing plate 40 is configured to process various types of PCB boards, which improves the versatility of the fixture. When other types of PCB boards need to be repaired, each repair pin 50 is clearance-fitted with the corresponding connecting hole 21 and limiting hole 41 for easy replacement. Thus, when it is necessary to remove or insert the repair pin 50, it can be directly pulled out or inserted, which is convenient and improves efficiency. Since the diameter of the repair pin 50 is smaller than the burr hole to be repaired, the PCB board will not pull out the repair pin 50 when it is removed, ensuring structural reliability.

[0042] The size of the limiting hole 41 is equal to the size of the corresponding connecting hole 21, and the repair pin 50 is cylindrical.

[0043] In other embodiments, each connecting hole 21 extends through to the bottom surface of the first fixing plate 20 to form a limiting groove 22, and the bottom of each repair pin 50 is provided with a limiting part 51 that is limited and engaged with the corresponding limiting groove 22. Through the limiting engagement of the limiting part 51 and the limiting groove 22, this structure has the advantage of high assembly reliability of the repair pin 50, but has the disadvantage of cumbersome steps in replacing the repair pin 50.

[0044] In this embodiment, the outer side wall of the spring post 60 is matched with the inner side wall of the corresponding clearance hole 42, which can improve the overall stability of the second fixing plate 40 and the spring post 60.

[0045] In this embodiment, the fixture also includes columns 70. There are multiple columns 70, which are installed at the bottom of the support plate 10. Specifically, there are four columns 70, which are installed at the four corners of the bottom of the support plate 10.

[0046] Among them, the column 70 is a screw column, and the screw passes through the first fixing plate 20 and the support plate 10 and is threaded to the corresponding column 70.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A PCB board hole burr repair fixture, characterized in that: Includes a support plate, a first fixing plate, a connecting column, a second fixing plate, a repair pin, and a spring column; The first fixing plate is installed on the top of the support plate, and the first fixing plate is provided with multiple connection holes; There are multiple connecting columns, each of which is arranged longitudinally and its two ends are respectively connected to the first fixing plate and the second fixing plate; The second fixing plate is provided with multiple limiting holes and multiple clearance holes, and the multiple limiting holes are provided in a one-to-one correspondence with the multiple connecting holes; There are multiple repair needles. The bottom end of each repair needle is installed in the connecting hole, and the top end of each repair needle extends out of the second fixing plate through the limiting hole. Its cross-sectional dimension is not greater than the cross-sectional dimension of the burr hole to be repaired. The outer side wall of the repair needle is limited and matched with the inner side wall of the limiting hole. There are multiple spring pillars, and the bottom end of each spring pillar is installed on the support plate or the first fixing plate. The top end of the spring pillar is provided with a positioning part. The positioning part extends out of the second fixing plate through a corresponding clearance hole and is used to position and cooperate with the copper-free hole at the edge of the PCB board. The distance between the connection position of the positioning part and the PCB board and the second fixing plate is greater than the compression distance of the positioning part during the repair process.

2. The PCB board hole burr repair fixture according to claim 1, characterized in that: The tip cross-sectional dimension of the repair needle is smaller than the cross-sectional dimension of the burr hole to be repaired.

3. The PCB board hole burr repair fixture according to claim 2, characterized in that: The tip diameter of the repair needle is 0.05 mm to 0.1 mm smaller than the diameter of the burr hole to be repaired.

4. The PCB board hole burr repair fixture according to claim 2, characterized in that: Each of the repair pins is clearance-fitted with the corresponding connecting hole and limiting hole.

5. The PCB board hole burr repair fixture according to claim 4, characterized in that: The size of the limiting hole is equal to the size of the corresponding connecting hole, and the repair needle is cylindrical.

6. The PCB board hole burr repair fixture according to claim 1, characterized in that: Each of the connecting holes extends through to the bottom surface of the first fixing plate to form a limiting groove, and the bottom of each repair pin is provided with a limiting part that cooperates with the corresponding limiting groove.

7. The PCB board hole burr repair fixture according to claim 1, characterized in that: The outer wall of the spring post is matched with the inner wall of the corresponding clearance hole for limiting movement.

8. The PCB board hole burr repair fixture according to claim 1, characterized in that: The connecting post is a screw post, and both the first fixing plate and the second fixing plate are connected to the connecting post by screws.

9. The PCB board hole burr repair fixture according to claim 1, characterized in that: It also includes columns, of which there are multiple columns, which are installed at the bottom of the support plate.

10. The PCB board hole burr repair fixture according to claim 9, characterized in that: The column is a screw column, with screws threaded through the first fixing plate and the support plate to the corresponding column.

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