Universal reflow welding tool for upper cavity and lower cavity of multi-channel TR assembly

Abstract

The utility model relates to the technical field of microelectronic assembly, and discloses a universal reflow welding tool for upper and lower cavities of a multi-channel TR assembly, the reflow welding tool is used for enabling two groups of PCBs to be attached to two opposite heat conduction surfaces of a heat storage box body, and the reflow welding tool comprises a reference frame, a limiting unit and an adjusting unit, wherein a space for accommodating the heat storage box body is formed in the reference frame; the multiple limiting units are arranged, the positions of the limiting units on the reference frame are adjusted through the adjusting unit, the ends of the limiting units are used for abutting against the PCB, and the heat storage box is clamped through the PCB. The PCB welding device has the effect of improving the welding efficiency and the welding quality of welding the PCB on the heat storage box body.

Description

Technical Field

[0001] This application relates to the field of microelectronic assembly technology, and in particular to a universal reflow welding fixture for the upper and lower cavities of a multi-channel TR assembly. Background Technology

[0002] The TR module is a core component of a wireless transceiver system, located between the radio frequency signal and the antenna, forming the basic architecture of the system. One end of this module connects to the antenna, and the other end connects to the intermediate frequency processing unit. In the design of the TR module, the thermal storage enclosure plays a crucial role in thermal management. Because the TR module releases a significant amount of heat during operation, effective thermal management design is necessary to dissipate this heat, ensuring normal operation and extending its lifespan.

[0003] To improve heat dissipation efficiency, the PCB board may be soldered to the heat storage box (i.e., the heat dissipation device). Currently, reflow soldering is a commonly used soldering method. In the process of soldering multiple PCB boards to the heat storage box, the usual practice is to first place one PCB board on one side of the heat storage box, and then place the entire assembly in a reflow oven for soldering. After soldering is complete, another PCB board is placed on the other side of the heat storage box and soldered again.

[0004] However, this method has relatively low soldering efficiency. Furthermore, due to the deformation of the PCB board at high temperatures during conventional reflow soldering, large-area PCB boards are prone to bending, which can lead to solder voids and affect soldering quality. Utility Model Content

[0005] To improve the welding efficiency and quality of PCB board soldering onto the heat storage box, this application provides a universal reflow soldering fixture for the upper and lower cavities of a multi-channel TR assembly.

[0006] This application provides a universal reflow welding fixture for the upper and lower cavities of a multi-channel TR assembly, which adopts the following technical solution:

[0007] A universal reflow soldering fixture for the upper and lower cavities of a multi-channel TR assembly is disclosed. The reflow soldering fixture is used to bond two sets of PCBs onto two opposing heat-conducting surfaces of a heat storage box. The reflow soldering fixture includes a reference frame, a limiting unit, and an adjustment unit, wherein:

[0008] The reference frame has an interior space for accommodating the heat storage box.

[0009] The limiting unit is provided in several parts, and its position on the reference frame is adjusted by the adjusting unit. The end of the limiting unit is used to abut against the PCB board and to clamp the heat storage box body through the PCB board.

[0010] Optionally, the reference frame includes a reference plate and an adjusting member, wherein:

[0011] The reference board consists of two pieces, each corresponding to a PCB board;

[0012] The adjusting member connects the two reference plates and adjusts the distance between the two reference plates.

[0013] Optionally, the adjusting component includes an adjusting tube and a connecting bolt, wherein:

[0014] The regulating tube is located between the two reference plates;

[0015] The connecting bolt corresponds to the reference plate, the connecting bolt is threadedly connected to the adjusting pipe, and the bolt head of the connecting bolt abuts against the reference plate.

[0016] Optionally, the adjusting unit includes a sliding column, a positioning block, and a positioning nut, wherein:

[0017] The reference plate is provided with several sliding grooves, the sliding column is placed inside the sliding groove and the sliding column slides in conjunction with the sliding groove, the sliding column is provided with a connecting hole, the limiting unit passes through the connecting hole and is threadedly connected to the connecting hole;

[0018] The positioning block is fixed to the end of the sliding column;

[0019] The positioning nut is threadedly connected to the sliding column, and the positioning nut and the positioning block clamp the reference plate.

[0020] Optionally, the positioning block is provided with a plane that abuts against the inner wall of the groove.

[0021] Optionally, the limiting unit includes a connecting cylinder and a ejector pin, wherein:

[0022] One end of the connecting cylinder is closed, and the other end is open, and the connecting cylinder is threadedly connected to the connecting hole;

[0023] The ejector pin is located inside the connecting cylinder and extends out of the opening. The ejector pin slides in conjunction with the connecting cylinder, and the end of the ejector pin is used to abut against the PCB board.

[0024] Optionally, the limiting unit further includes a retaining spring, which is located inside the connecting cylinder, with one end of the retaining spring abutting against the connecting cylinder and the other end of the retaining spring abutting against the ejector pin.

[0025] Optionally, the heat-conducting surface of the heat storage box is provided with a cavity, the PCB board is located in the cavity, and a reference block is provided on the reference frame. The reference block is used to abut against the inner wall of the cavity. A positioning groove is provided on the side wall of the heat storage box, and the adjusting tube is used to be placed in the positioning groove.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. Before soldering the heat storage box and PCB board, place the PCB board on the top or bottom heat-conducting surface of the heat storage box. Place the entire heat storage box and PCB board into the reference frame. Adjust the position of the limiting units on the reference frame using the adjustment unit. After the limiting units are in the set position, they contact the PCB board. Several limiting units cooperate to clamp the heat storage box by contacting the PCB board. This allows multiple PCB boards to be pressed against the heat storage box simultaneously, completing the soldering of the PCB board and the heat storage box, improving the soldering efficiency. Simultaneously, the multiple limiting units limit the PCB board, reducing the possibility of bending during soldering and further improving the soldering quality of the PCB board and the heat storage box. Attached Figure Description

[0028] Figure 1 This is a schematic diagram illustrating the clamping state of the heat storage box and the PCB board in the embodiments of this application.

[0029] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0030] Figure 3 This is a schematic diagram illustrating the positional relationship between the adjusting part and the connecting cylinder in an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Reference frame; 11. Reference plate; 111. Reference block; 112. Slide groove; 12. Adjusting component; 121. Adjusting tube; 122. Connecting bolt; 2. Limiting unit; 21. Connecting cylinder; 22. Ejector pin; 23. Clamping spring; 3. Adjusting unit; 31. Sliding column; 311. Connecting hole; 312. Plane; 32. Positioning block; 33. Positioning nut; 4. Heat storage box body; 41. Chamber; 42. Positioning groove; 5. PCB board. Detailed Implementation

[0033] The following is combined with Figure 1-Figure 3 This application is described in further detail.

[0034] This application discloses a universal reflow welding fixture for the upper and lower cavities of a multi-channel TR assembly.

[0035] A universal reflow welding fixture for the upper and lower cavities of a multi-channel TR assembly includes a reference frame 1, a limiting unit 2, and an adjustment unit 3. The reference frame 1 has a space inside for accommodating the heat storage box 4, and the limiting unit 2 is fixedly mounted on the reference frame 1 through the adjustment unit 3.

[0036] The heat storage box 4 has two heat-conducting surfaces, located at the top and bottom of the heat storage box 4 respectively. There are two sets of PCB boards 5, one set of PCB boards 5 contacting the heat-conducting surface at the top of the heat storage box 4, and the other set of PCB boards 5 contacting the heat-conducting surface at the bottom of the heat storage box 4.

[0037] Each group of PCB boards 5 includes several PCB boards 5. In the embodiments of this application, each group of PCB boards 5 includes a single PCB board 5.

[0038] Before welding the heat storage box 4 and the PCB board 5, the PCB board 5 is placed on the top or bottom heat-conducting surface of the heat storage box 4, and the heat storage box 4 and the PCB board 5 are placed inside the reference frame 1 as a whole. The position of the limiting unit 2 on the reference frame 1 is adjusted by the adjusting unit 3. After the limiting unit 2 is placed in the set position, it abuts against the PCB board 5. Several limiting units 2 cooperate with each other to clamp the heat storage box 4 by abutting against the PCB board 5. This allows multiple PCB boards 5 to be pressed against the heat storage box 4 at the same time, completing the welding of the PCB board 5 and the heat storage box 4, and improving the welding efficiency of the PCB board 5 and the heat storage box 4. At the same time, by limiting the PCB board 5 with multiple limiting units 2, the possibility of the PCB board 5 bending during the welding process is reduced, further improving the welding quality of the PCB board 5 and the heat storage box 4.

[0039] To improve the accuracy of the placement of the PCB board 5, the top and bottom heat-conducting surfaces of the heat storage box 4 are provided with chambers 41 for placing the PCB board 5. According to the position of the chambers 41, the chamber 41 located at the top of the heat storage box 4 is the upper chamber, and the chamber 41 located at the bottom of the heat storage box 4 is the lower chamber. The PCB board 5 is positioned by the inner wall of the chamber 41.

[0040] The reference frame 1 includes a reference plate 11 and an adjusting component 12.

[0041] Two reference plates 11 are provided. The heat-conducting surfaces of the reference plates 11 and the top and bottom of the heat storage box 4 correspond one-to-one. The two reference plates 11 are arranged in parallel, and there is space between the two reference plates 11 for placing the heat storage box 4.

[0042] The adjusting component 12 includes an adjusting tube 121 and a connecting bolt 122.

[0043] The adjusting tube 121 is located between two reference plates 11 and is perpendicular to the reference plates 11. Several connecting bolts 122 are provided, and the connecting bolts 122 correspond to the reference plates 11. The connecting bolts 122 pass through the corresponding reference plates 11 and are threadedly connected to the adjusting tube 121.

[0044] When adjusting the distance between the two reference plates 11, simply replace the adjusting tube 121 with one of different lengths according to the required distance between the two reference plates 11. When fixing the reference plate 11, connect it to the adjusting tube 121 with a connecting bolt 122, and press the reference plate 11 against the end of the adjusting tube 121 with the bolt head of the connecting bolt 122.

[0045] In order to improve the positional accuracy of the reference frame 1 and the heat storage box 4, a positioning groove 42 is provided on the end side wall of the heat storage box 4, the adjustment tube 121 is located at the positioning groove 42, and a reference block 111 is fixedly installed on the side of the reference plates 11 that are close to each other. The reference block 111 is placed inside the chamber 41 of the heat storage box 4 and abuts against the inner wall of the chamber 41.

[0046] The adjustment unit 3 includes a sliding column 31, a positioning block 32, and a positioning nut 33.

[0047] The positioning block 32 is located at one end of the slide column 31, and the slide column 31 and the positioning block 32 are integrally formed. The positioning nut 33 is threadedly connected to the other end of the slide column 31.

[0048] The reference plate 11 is provided with several sliding grooves 112. The adjustment unit 3 slides in cooperation with the corresponding sliding grooves 112, which facilitates the adjustment of the relative position of the adjustment unit 3 and the reference plate 11.

[0049] When the adjustment unit 3 is installed inside the slide groove 112, the slide column 31 is placed in the corresponding slide groove 112, and the positioning block 32 and the positioning nut 33 clamp the reference plate 11. After the slide column 31 slides to the corresponding position, the positioning nut 33 is tightened so that the positioning block 32 and the positioning nut 33 cooperate to clamp the reference plate 11.

[0050] To reduce the possibility of the slide column 31 rotating inside the slide groove 112, a plane 312 is provided on the side wall of the slide column 31 that abuts against the inner wall of the slide groove 112.

[0051] The limiting unit 2 includes a connecting cylinder 21, a ejector pin 22, and a clamping spring 23.

[0052] One end of the connecting cylinder 21 is closed, and the other end is open. The ejector pin 22 is placed inside the connecting cylinder 21 and extends out of the connecting cylinder 21 from the opening. The ejector pin 22 is in sliding engagement with the connecting cylinder 21. The retaining spring 23 is located inside the connecting cylinder 21. One end of the retaining spring 23 abuts against the end of the connecting cylinder 21, and the other end of the retaining spring abuts against the ejector pin 22.

[0053] When the ejector pin 22 contacts the PCB board 5, the retaining spring 23 absorbs part of the force on the ejector pin 22, reducing the possibility of the ejector pin 22 damaging the PCB board 5.

[0054] The sliding column 31 has a connecting hole 311. The connecting cylinder 21 passes through the connecting hole 311 and is threadedly connected to the connecting hole 311. The threaded connection gradually adjusts the force of the ejector pin 22 pressing the PCB board 5, further reducing the possibility of the ejector pin 22 damaging the PCB board 5.

[0055] The implementation principle of a universal reflow soldering fixture for the upper and lower cavities of a multi-channel TR assembly according to an embodiment of this application is as follows: Before soldering the PCB board 5 to the heat storage box 4, the PCB board 5 is placed in the cavity 41 of the heat-conducting surface, and two reference plates 11 are placed on both sides of the heat storage box 4. The adjusting tube 121 is positioned at the positioning groove 42, and the reference block 111 and the inner wall of the cavity 41 of the heat storage box 4 are in contact. The reference frame 1 is installed by connecting the adjusting tube 121 with the connecting bolt 122. The sliding column 31 is placed inside the sliding groove 112. According to the position required by the limiting unit 2, the sliding column 31 moves inside the sliding groove 112. After reaching the set position, the positioning nut 33 is tightened, so that the positioning nut 33 and the positioning block 32 cooperate to clamp the reference plate 11, reducing the possibility of the sliding column 31 moving again. Then, the connecting cylinder 21 is threaded into the connecting hole 311, and the PCB board 5 is pressed against the heat storage box 4 by the ejector pin 22. This makes it easier to weld multiple PCB boards 5 onto the heat storage box 4 at the same time and reduces the possibility of the PCB board 5 bending during the welding process.

[0056] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A universal reflow soldering fixture for the upper and lower cavities of a multi-channel TR assembly, wherein the reflow soldering fixture is used to bond two sets of PCB boards to two opposite thermally conductive surfaces of a heat storage box, characterized in that: The reflow welding fixture includes a reference frame, a limiting unit, and an adjustment unit, wherein: The reference frame has an interior space for accommodating the heat storage box. The limiting unit is provided in several parts, and its position on the reference frame is adjusted by the adjusting unit. The end of the limiting unit is used to abut against the PCB board and to clamp the heat storage box body through the PCB board.

2. The universal reflow welding fixture for the upper and lower cavities of a multi-channel TR assembly according to claim 1, characterized in that: The reference frame includes a reference plate and an adjusting component, wherein: The reference board consists of two pieces, each corresponding to a PCB board; The adjusting member connects the two reference plates and adjusts the distance between the two reference plates.

3. The universal reflow welding fixture for the upper and lower cavities of a multi-channel TR assembly according to claim 2, characterized in that: The adjusting component includes an adjusting tube and a connecting bolt, wherein: The regulating tube is located between the two reference plates; The connecting bolt corresponds to the reference plate, the connecting bolt is threadedly connected to the adjusting pipe, and the bolt head of the connecting bolt abuts against the reference plate.

4. The universal reflow welding fixture for the upper and lower cavities of a multi-channel TR assembly according to claim 2, characterized in that: The adjusting unit includes a sliding column, a positioning block, and a positioning nut, wherein: The reference plate is provided with several sliding grooves, the sliding column is placed inside the sliding groove and the sliding column slides in conjunction with the sliding groove, the sliding column is provided with a connecting hole, the limiting unit passes through the connecting hole and is threadedly connected to the connecting hole; The positioning block is fixed to the end of the sliding column; The positioning nut is threadedly connected to the sliding column, and the positioning nut and the positioning block clamp the reference plate.

5. The universal reflow welding fixture for the upper and lower cavities of a multi-channel TR assembly according to claim 4, characterized in that: The positioning block has a flat surface that abuts against the inner wall of the groove.

6. The universal reflow welding fixture for the upper and lower cavities of a multi-channel TR assembly according to claim 4, characterized in that: The limiting unit includes a connecting cylinder and a ejector pin, wherein: One end of the connecting cylinder is closed, and the other end is open, and the connecting cylinder is threadedly connected to the connecting hole; The ejector pin is located inside the connecting cylinder and extends out of the opening. The ejector pin slides in conjunction with the connecting cylinder, and the end of the ejector pin is used to abut against the PCB board.

7. The universal reflow welding fixture for the upper and lower cavities of a multi-channel TR assembly according to claim 6, characterized in that: The limiting unit also includes a retaining spring, which is located inside the connecting cylinder, with one end of the retaining spring abutting against the connecting cylinder and the other end of the retaining spring abutting against the ejector pin.

8. The universal reflow welding fixture for the upper and lower cavities of a multi-channel TR assembly according to claim 3, characterized in that: The heat-conducting surface of the heat storage box is provided with a cavity, the PCB board is located in the cavity, and a reference block is provided on the reference frame. The reference block is used to abut against the inner wall of the cavity. A positioning groove is provided on the side wall of the heat storage box, and the adjusting tube is used to be placed in the positioning groove.

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