Special positioning clamp for browning of PCB embedded copper block

Abstract

The utility model relates to the technical field of positioning clamps, and discloses a special positioning clamp for browning of a PCB embedded copper block, which comprises a substrate, a clamping plate is attached to the top of the substrate, deep control grooves with different sizes are preset on an assembly plate, and an assembly block slides on a second positioning column, so that the assembly block drives the assembly plate to slide into an assembly groove, and the clamping plate is clamped in the assembly groove. The positioning clamp is arranged on the base plate, the positioning block is made to be aligned with the limiting groove, then the positioning block is pushed to slide in the spring groove in a reset mode through the restoring force of the spring, the positioning block penetrates through the limiting groove, the assembling plate is fixed to the base plate, the assembling plate with the deep control grooves of different sizes is replaced, and the positioning clamp can conduct browning treatment on copper blocks of different sizes. Therefore, the universality and the flexibility of the positioning clamp are improved.

Description

Technical Field

[0001] This utility model relates to the field of positioning fixture technology, specifically to a special positioning fixture for browning copper blocks in PCBs. Background Technology

[0002] In today's rapidly developing electronic information technology landscape, PCBs, as key components of electronic devices, are evolving rapidly towards higher density, higher precision, and greater multifunctionality. Embedded copper technology is increasingly widely used in high-end PCB manufacturing due to its ability to effectively improve PCB heat dissipation, conductivity, and mechanical strength. Meanwhile, the browning process, a crucial step in PCB production, forms a uniform oxide layer on the copper surface to enhance the adhesion between the copper layer and materials such as resin.

[0003] In the PCB embedded copper block browning process, traditional positioning fixtures lack modular disassembly design. Their fixed clamping structure cannot be flexibly disassembled and reassembled according to the differences in the length, width and height of the copper block. Therefore, the positioning fixtures have poor versatility and flexibility. Therefore, those skilled in the art provide a special positioning fixture for PCB embedded copper block browning to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to provide a special positioning fixture for the browning of copper blocks in PCBs, which solves the problem that the positioning fixtures in the prior art cannot be flexibly disassembled and reassembled according to the differences in the length, width and height of the copper blocks due to the lack of modular disassembly design.

[0005] This utility model provides the following technical solution: a special positioning fixture for PCB embedded copper block browning, including a substrate, a clamping plate attached to the top of the substrate, four sets of first positioning posts symmetrically arranged at equal intervals on the side surface of the substrate facing the clamping plate, four sets of positioning grooves opened on the side surface of the clamping plate facing the first positioning posts, the four sets of first positioning posts being slidably connected in the four sets of positioning grooves respectively, two sets of assembly plates attached to the substrate, and a connecting component for mutual connection between the substrate and the assembly plates.

[0006] As a preferred embodiment of the above technical solution, the connecting assembly includes two sets of assembly grooves respectively formed on the front and rear end substrate surfaces of the two sets of assembly plates. Two sets of second positioning posts are symmetrically arranged on the side surface of the two sets of assembly grooves facing the clamping plate. Assembly blocks are slidably connected to the two sets of second positioning posts. The side surface of the two sets of assembly blocks facing the assembly plate is fixedly connected to the outer wall of the assembly plate. Spring grooves are formed on the side surface of the two sets of assembly blocks facing away from the assembly plate. Springs are fixedly connected to the inner walls of the two sets of spring grooves. Positioning blocks are fixedly connected to the other ends of the two sets of springs, and the positioning blocks are slidably connected to the spring grooves. Limiting grooves are formed on the inner walls of the assembly grooves corresponding to the outer end surfaces of the two sets of positioning blocks.

[0007] As a preferred embodiment of the above technical solution, the positioning block is rectangular in shape, and both the limiting groove and the spring groove are provided with through holes that are compatible with the positioning block.

[0008] As a preferred embodiment of the above technical solution, one end of the spring is welded to the inner wall of the spring groove, and the other end of the spring is welded to the inner end surface of the positioning block.

[0009] As a preferred embodiment of the above technical solution, multiple sets of depth control grooves are equally spaced on the side surface of the two sets of assembly plates facing the clamping plate. Copper blocks are placed in each set of depth control grooves, and drainage holes are opened on the inner wall of the depth control groove corresponding to the bottom surface of each set of copper blocks.

[0010] As a preferred embodiment of the above technical solution, the groove spacing of the depth control groove is 28mm, and the groove edge distance of the depth control groove is 50mm.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model uses pre-set depth control grooves of different sizes on the assembly plate, and then slides the assembly block on the second positioning post to make the assembly block drive the assembly plate into the assembly groove, and align the positioning block with the limiting groove. Then, the spring's restoring force pushes the positioning block to return to its original position in the spring groove and slides through the limiting groove, so that the positioning block is fixed on the base plate. By replacing the assembly plate with different sized depth control grooves, the positioning fixture can perform browning treatment on copper blocks of different sizes, thereby improving the versatility and flexibility of the positioning fixture.

[0013] 2. This utility model achieves precise positioning by matching the thickness of the copper block with that of the depth control tank, and further optimizes the flow of chemical solution in the depth control tank by opening an array of drainage holes on the inner wall of the depth control tank, thereby avoiding the occurrence of residual air bubbles in the depth control tank. Attached Figure Description

[0014] Figure 1 A three-dimensional structural schematic diagram of a special positioning fixture for browning copper blocks in PCBs;

[0015] Figure 2 A partial cross-sectional schematic diagram of the connecting components of a special positioning fixture for browning copper blocks in PCBs;

[0016] Figure 3 A schematic diagram of the disassembled structure of a substrate component for a special positioning fixture for browning copper blocks in PCBs;

[0017] Figure 4 A special positioning fixture for browning copper blocks in PCBs Figure 2 A magnified structural diagram of point A in the middle.

[0018] Legend:

[0019] 1. Substrate; 2. Clamping plate; 3. Positioning groove; 4. First positioning post; 5. Connecting assembly; 51. Assembly groove; 52. Second positioning post; 53. Assembly block; 54. Spring groove; 55. Spring; 56. Positioning block; 57. Limiting groove; 6. Depth control groove; 7. Copper block; 8. Drain hole; 9. Assembly plate. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Please see Figures 1-4 As shown, this utility model provides a technical solution: a special positioning fixture for PCB embedded copper block browning, including a base plate 1, a clamping plate 2 attached to the top of the base plate 1, four sets of first positioning posts 4 symmetrically arranged at equal intervals on the side surface of the base plate 1 facing the clamping plate 2, four sets of positioning grooves 3 opened on the side surface of the clamping plate 2 facing the first positioning posts 4, the four sets of first positioning posts 4 are slidably connected in the four sets of positioning grooves 3 respectively, two sets of assembly plates 9 are attached to the base plate 1, and a connecting component 5 for mutual connection is provided between the base plate 1 and the assembly plate 9.

[0022] As one implementation method in this embodiment, please refer to Figures 1-4 As shown, the connecting component 5 includes two sets of assembly grooves 51 respectively opened on the front and rear end substrates 1 of the two sets of assembly plates 9. Two sets of second positioning posts 52 are symmetrically arranged on the side surface of the two sets of assembly grooves 51 facing the clamping plate 2. Assembly blocks 53 are slidably connected to the two sets of second positioning posts 52. The side surface of the two sets of assembly blocks 53 facing the assembly plate 9 is fixedly connected to the outer wall of the assembly plate 9. Spring grooves 54 are opened on the side surface of the two sets of assembly blocks 53 away from the assembly plate 9. Springs 55 are fixedly connected to the inner wall of the two sets of spring grooves 54. Positioning blocks 56 are fixedly connected to the other end of the two sets of springs 55, and the positioning blocks 56 are slidably connected to the spring grooves 54. Limiting grooves 57 are opened on the inner wall of the assembly grooves 51 corresponding to the outer end surface of the two sets of positioning blocks 56.

[0023] Specifically, by pre-setting depth control grooves 6 of different sizes on the assembly plate 9, and then sliding the assembly block 53 on the second positioning post 52, the assembly block 53 drives the assembly plate 9 into the assembly groove 51, and aligns the positioning block 56 with the limiting groove 57. Then, by using the restoring force of the spring 55, the positioning block 56 is pushed to reset and slide in the spring groove 54, and the positioning block 56 passes through the limiting groove 57, so that the assembly plate 9 is fixed on the base plate 1. By replacing the assembly plate 9 with different sizes of depth control grooves 6, the positioning fixture can perform browning treatment on copper blocks 7 of different sizes, thereby improving the versatility and flexibility of the positioning fixture.

[0024] As one implementation method in this embodiment, please refer to Figures 1-4 As shown, the positioning block 56 is rectangular in shape, and both the limiting groove 57 and the spring groove 54 have through holes that are adapted to the positioning block 56.

[0025] Specifically, this implementation allows the positioning block 56 to fully fit against the inner wall of the spring groove 54, thereby making the sliding of the positioning block 56 by the spring 55 in the spring groove 54 more stable and preventing the positioning block 56 from getting stuck in the spring groove 54 due to excessive force output by the spring 55 to one side.

[0026] As one implementation method in this embodiment, please refer to Figures 1-4 As shown, one end of the spring 55 is welded to the inner wall of the spring groove 54, and the other end of the spring 55 is welded to the inner end surface of the positioning block 56.

[0027] Specifically, this increases the connection strength between the spring 55, the spring groove 54, and the positioning block 56, while ensuring that the elastic force output by the spring 55 is evenly distributed to the positioning block 56, thus guaranteeing the stability of the positioning block 56 sliding back and forth within the spring groove 54.

[0028] As one implementation method in this embodiment, please refer to Figures 1-3 As shown, multiple sets of depth control grooves 6 are equally spaced on the surface of the two sets of assembly plates 9 facing the clamping plate 2. Copper blocks 7 are placed in each set of depth control grooves 6, and drain holes 8 are opened on the inner wall of the depth control grooves 6 corresponding to the bottom surface of each set of copper blocks 7.

[0029] Specifically, precise positioning is achieved by matching the thickness of the copper block 7 with that of the depth control tank 6. Furthermore, an array of drainage holes 8 are provided on the inner wall of the depth control tank 6 to optimize the flow of chemical solution within the tank and prevent the presence of residual air bubbles.

[0030] As one implementation method in this embodiment, please refer to Figures 1-3 As shown, the groove spacing of the depth control groove 6 is 28mm, and the groove edge distance of the depth control groove 6 is 50mm.

[0031] In practice, precise positioning is achieved by matching the thickness of the depth control groove 6 with that of the copper block 7.

[0032] Working principle: First, the substrate 1 is set to a thickness of 2.0mm double-sided copper-clad laminate, and its dimensions are set to 458mm × 544mm spring groove. There are 8 depth control grooves 6, each with a length of 444mm, a width of d-5mm, and a depth of 1.5mm; groove spacing is 28mm, and groove edge distance is 50mm; drainage holes 8, with a diameter of 1.0mm and a spacing of 1.0mm, are evenly distributed along the longitudinal direction of the grooves, thus matching the thickness of the copper block 7 with the depth control groove 6 for precise positioning. Then, an array of drainage holes 8 is formed on the inner wall of the depth control groove 6 to optimize the flow of the chemical solution within the groove, preventing air bubbles from remaining in the groove. Next, the positioning block 56 is pressed into the spring groove 54, so that the positioning block 56 aligns with the spring 55. The assembly block 53 is then pressed and slid into the spring groove 54. Next, the assembly block 53 is placed on the second positioning post 52, and the assembly block 53 drives the assembly plate 9 to slide into the assembly groove 51. At this time, the positioning block 56 is aligned with the limiting groove 57. Then, the restoring force of the spring 55 pushes the positioning block 56 to reset and slide in the spring groove 54, and the positioning block 56 passes through the limiting groove 57. Then, it slides on the first positioning post 4 through the positioning groove 3 on the clamping plate 2. Then, the liquid is introduced into the depth control groove 6, so that the clamping plate 2 and the substrate 1 are attached, thereby achieving the browning treatment of the copper block 7 in the depth control groove 6. When it is necessary to remove the assembly plate 9, the positioning block 56 is pressed into the spring groove 54, and the assembly block 53 is slid out from the second positioning post 52.

[0033] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A positioning fixture special for PCB brown oxidation of copper-embedded block, comprising a base plate (1), characterized in that: The substrate (1) top is attached with a clamping plate (2), four groups of first positioning columns (4) are symmetrically arranged on the side surface of the substrate (1) facing the clamping plate (2), four groups of positioning grooves (3) are formed on the side surface of the clamping plate (2) facing the first positioning columns (4), and the four groups of first positioning columns (4) are respectively connected in the four groups of positioning grooves (3) in a sliding mode, two groups of assembly plates (9) are attached on the substrate (1), and a connecting assembly (5) for mutual connection is arranged between the substrate (1) and the assembly plate (9).

2. The positioning fixture for PCB brown oxidation of embedded copper block according to claim 1, characterized in that: The connecting assembly (5) comprises two groups of assembly grooves (51) formed on the front and rear end substrate (1) surfaces of the two groups of assembly plates (9), two groups of second positioning columns (52) are symmetrically arranged on the side surface of the two groups of assembly grooves (51) facing the clamping plate (2), assembly blocks (53) are connected on the two groups of second positioning columns (52) in a sliding mode, the two groups of assembly blocks (53) are fixedly connected with the assembly plate (9) outer wall on the side surface facing the assembly plate (9), spring grooves (54) are formed on the end surface of the two groups of assembly blocks (53) away from the assembly plate (9), springs (55) are fixedly connected on the inner walls of the two groups of spring grooves (54), positioning blocks (56) are fixedly connected on the other ends of the two groups of springs (55), the positioning blocks (56) are connected with the spring grooves (54) in a sliding mode, and limiting grooves (57) are formed on the inner walls of the corresponding assembly grooves (51) of the outer end surfaces of the two groups of positioning blocks (56).

3. The positioning fixture for PCB brown oxidation of embedded copper block according to claim 2, characterized in that: The positioning block (56) is designed in a rectangular shape, and the limiting grooves (57) and the spring grooves (54) are provided with through holes matched with the positioning block (56) in the inner walls.

4. The positioning fixture for PCB brown oxidation of embedded copper block according to claim 2, characterized in that: One end of the spring (55) is welded on the inner wall of the spring groove (54), and the other end of the spring (55) is welded on the inner end surface of the positioning block (56).

5. The positioning fixture for PCB brown oxidation of embedded copper block according to claim 1, characterized in that: The two groups of assembly plates (9) are provided with a plurality of depth control grooves (6) on the side surface facing the clamping plate (2) at equal intervals, and copper blocks (7) are placed in the plurality of depth control grooves (6), and drainage holes (8) are formed on the inner walls of the corresponding depth control grooves (6) of the bottom end surfaces of the plurality of copper blocks (7).

6. The positioning fixture for PCB brown oxidation of embedded copper block according to claim 5, characterized in that: The groove spacing of the depth control groove (6) is 28mm, and the groove edge distance of the depth control groove (6) is 50mm.

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