PCB selective welding jig heat conduction structure

Abstract

The utility model discloses a heat conduction structure of a PCB selective welding jig, which comprises a heat conduction rod arranged at a notch of a jig substrate, the notch corresponding to a PCB; and the connecting block is integrally butted with the heat conducting rod and is positioned in the limiting groove in the side surface of the notch. The bottom of the jig is hollowed out, the notch corresponding to the PCB is formed, the PCB is placed in the notch, and positioning is achieved through the heat conduction rod and the rotary buckle, so that when the PCB is preheated in a selective welding preheating area, heat can be fully conducted to a product through the notch, after the PCB is moved out of the preheating area, the PCB can be continuously heated through the heat absorbed by the heat conduction rod, and the welding quality of the PCB is improved. Therefore, the heating and staying time in the preheating area is reduced, and the production efficiency is further improved. In addition, the heat conduction rod is detachably designed on the jig, so that the PCBs of different sizes are stably supported, heat is efficiently and fully conducted, and the heat conduction rod is convenient to replace and clean.

Description

Technical Field

[0001] This utility model relates to the field of welding fixture technology, specifically a heat-conducting structure for a PCB board selective welding fixture. Background Technology

[0002] Selective wave soldering, also known as selective wave soldering, is primarily used in the soldering of through-hole components in PCBs. Its applications extend beyond military electronics, aerospace and marine electronics, automotive electronics, digital cameras, printers, and other multi-layer PCBs with high soldering requirements and complex processes. Selective wave soldering is divided into offline and online types. Offline selective wave soldering refers to a system that operates independently of the production line. The flux application machine and the selective soldering machine are separate units, with the preheating module following the soldering unit. This type features human-machine interaction and a smaller equipment footprint. Online selective wave soldering, on the other hand, receives real-time data from the production line and completes fully automated integration. Its flux application module, preheating module, and soldering module are integrated into a single structure. It features fully automated chain transmission, occupies a larger equipment footprint, and is suitable for production modes with high automation requirements.

[0003] The positioning fixtures used for welding usually have notches set in the welding area of ​​the PCB board. This makes it difficult for heat to be quickly transferred to the PCB board when preheating the PCB board in the welding preheating zone, due to the small exposed area of ​​the PCB board surface. This results in a long preheating time and low production efficiency. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that when the positioning fixture for selective soldering preheats the PCB board in the selective soldering preheating zone, the small exposed area of ​​the PCB board surface makes it difficult to quickly transfer heat to it, resulting in a long preheating time and low production efficiency. Therefore, this utility model provides a heat-conducting structure for a PCB board selective soldering fixture.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a heat-conducting structure for a PCB board selective soldering fixture, comprising:

[0006] A heat-conducting rod is disposed at the notch of the fixture substrate, the notch corresponding to the PCB board;

[0007] A connecting block, which integrally connects to the heat-conducting rod, is positioned within a limiting groove on the side of the notch.

[0008] As a further description of the above technical solution:

[0009] The surface of the heat-conducting rod is flush with the top surface of the fixture substrate.

[0010] As a further description of the above technical solution:

[0011] The connecting block is provided with a first assembly hole, and the limiting groove is provided with a second assembly hole. The first assembly hole and the second assembly hole are fixed by fasteners.

[0012] As a further description of the above technical solution:

[0013] The fastener is a pin or a bolt.

[0014] As a further description of the above technical solution:

[0015] The limiting groove is a strip structure.

[0016] As a further description of the above technical solution:

[0017] The second assembly hole is arranged in several intervals along the length direction of the limiting groove.

[0018] As a further description of the above technical solution:

[0019] The fixture base plate is provided with a rotating buckle on the outside of the notch, and the rotating buckle is rotatably connected to the rotating shaft.

[0020] In summary, by adopting the above technical solution, this utility model has the following advantages over the prior art:

[0021] Beneficial effects:

[0022] The fixture of this invention has a hollowed-out bottom, forming a notch corresponding to the PCB board. The PCB board is placed within the notch and supported by a heat-conducting rod. A rotating latch secures the board for pressure attachment and positioning. This allows heat to be fully conducted to the product through the notch during preheating in the selective soldering preheating zone. The heat absorbed by the heat-conducting rod during the period between the PCB board being removed from the preheating zone and the selective soldering operation can be used for continued heating of the PCB board, reducing its heating and dwell time in the preheating zone and thus improving production efficiency. Furthermore, the heat-conducting rod is detachable from the fixture to ensure stable support for PCB boards of different sizes, efficient and sufficient heat conduction, and easy replacement and cleaning of the heat-conducting rod. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the thermally conductive structure of a PCB board soldering fixture. Figure 1.

[0025] Figure 2 A schematic diagram of the thermally conductive structure of a PCB board soldering fixture. Figure 2 .

[0026] Legend:

[0027] 1. Heat-conducting rod; 2. Connecting block; 3. First assembly hole; 10. Fixture base plate; 11. Limiting groove; 12. Notch; 13. Second assembly hole; 14. Rotary buckle; 15. Rotary shaft. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Please see Figure 1-2 This utility model provides a technical solution: a heat-conducting structure for a PCB board selective soldering fixture, comprising:

[0031] A heat-conducting rod 1 is disposed at a notch 12 on the fixture substrate 10, and the notch 12 corresponds to the PCB board;

[0032] The connecting block 2 is integrally connected to the heat-conducting rod 1 and is positioned in the limiting groove 11 on the side of the notch 12.

[0033] The surface of the heat-conducting rod 1 is flush with the top surface of the fixture substrate 10 to provide stable support for the PCB board and prevent it from deforming.

[0034] The connecting block 2 is provided with a first mounting hole 3, and the limiting groove 11 is provided with a second mounting hole 13. The first mounting hole 3 and the second mounting hole 13 are fixed by fasteners. The fasteners are pins or bolts. The limiting groove 11 is a strip structure. Several second mounting holes 13 are arranged at intervals along the length of the limiting groove 11. The heat-conducting rod 1 adopts a detachable design on the fixture to achieve stable support for different PCB boards, efficient and sufficient heat conduction, and facilitate the replacement and cleaning of the heat-conducting rod 1.

[0035] The fixture base plate 10 is provided with a rotating buckle 14 on the outside of the notch 12, and the rotating buckle 14 is rotatably connected to the rotating shaft 15.

[0036] The working principle of the heat-conducting structure of the PCB board selective soldering fixture in this embodiment includes: the bottom of the fixture is hollowed out to form a notch 12 corresponding to the PCB board. The PCB board is placed in the notch 12 and supported by the heat-conducting rod 1. The rotating buckle 14 achieves pressure attachment and positioning, so that when the PCB board is preheated in the selective soldering preheating zone, the heat can be fully conducted to the product through the notch 12. The heat absorbed by the heat-conducting rod 1 during the period from when the PCB board is removed from the preheating zone to when the selective soldering operation is performed can be used to continue heating the PCB board, thereby reducing its heating and dwell time in the preheating zone and thus improving production efficiency. In addition, the heat-conducting rod 1 adopts a detachable design on the fixture to achieve stable support for PCB boards of different sizes, efficient and sufficient heat conduction, and facilitate the replacement and cleaning of the heat-conducting rod 1.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heat-conducting structure for a PCB board selective soldering fixture, characterized in that, include: A heat-conducting rod is disposed at the notch of the fixture substrate, the notch corresponding to the PCB board; A connecting block, which integrally connects to the heat-conducting rod, is positioned within a limiting groove on the side of the notch.

2. The PCB board selective soldering fixture heat-conducting structure according to claim 1, characterized in that, The surface of the heat-conducting rod is flush with the top surface of the fixture substrate.

3. The PCB board selective soldering fixture heat-conducting structure according to claim 1, characterized in that, The connecting block is provided with a first assembly hole, and the limiting groove is provided with a second assembly hole. The first assembly hole and the second assembly hole are fixed by fasteners.

4. The PCB board selective soldering fixture heat-conducting structure according to claim 3, characterized in that, The fastener is a pin or a bolt.

5. The thermally conductive structure of a PCB board selective soldering fixture according to claim 3, characterized in that, The limiting groove is a strip structure.

6. The PCB board selective soldering fixture heat-conducting structure according to claim 5, characterized in that, The second assembly hole is arranged in several intervals along the length direction of the limiting groove.

7. The thermally conductive structure of a PCB board selective soldering fixture according to claim 1, characterized in that, The fixture base plate is provided with a rotating buckle on the outside of the notch, and the rotating buckle is rotatably connected to the rotating shaft.

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