Preforming soldering lug

Abstract

The utility model relates to the technical field of preformed soldering lugs, and discloses a preformed soldering lug which comprises a polycarbonate alloy shell with a downward opening, heat conduction cones with downward tips are arranged in the polycarbonate alloy shell at intervals, and the heat conduction cones are made of titanium alloy materials. The upper end face of the heat conduction cone is exposed out of the upper end face of the polycarbonate alloy shell, and a preformed tin sheet is fixedly arranged on the heat conduction cone in a curing mode. According to the utility model, the welding sheet is convenient to position, the outside is separated during welding to prevent impurities from invading, and the tin sheet is convenient to melt quickly and is limited in the polycarbonate alloy shell until being cured and formed by the high-thermal-conductivity material.

Description

Technical Field

[0001] The utility model relates to the technical field of preformed solder pads, in particular to a preformed solder pad. Background Art

[0002] A preformed solder pad is a precision formed solder that can be made into different shapes, sizes and surface morphologies according to requirements, and is suitable for the manufacturing processes of various products with small tolerances. It is widely used in fields such as circuit board assembly, connectors and terminal devices, chip connection, power module substrate attachment, filter connectors and electronic component assembly, etc. Preformed solder pads are usually used in occasions where special requirements are placed on the shape and quality of the solder, and can be made into any size and shape according to customer needs. When welding electronic components on a circuit board, after the solder pad is heated and liquefied, the liquefied solder pad will spread around, which is likely to affect the cleanliness of the circuit board and also likely to affect other solder joints. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is: in order to overcome the problems existing above, a preformed solder pad is provided, which solves the above problems.

[0004] The utility model solves its technical problems by adopting the following technical solutions:

[0005] A preformed solder pad includes a polycarbonate alloy shell with a downward opening. Inside the polycarbonate alloy shell, heat conduction cones with downward tips are arranged at intervals. The heat conduction cones are made of titanium alloy material, and the upper end surfaces of the heat conduction cones are exposed from the upper end surface of the polycarbonate alloy shell. A preformed tin sheet is fixedly cured on the heat conduction cones. Since the heat conduction performance of the polycarbonate alloy shell is much lower than that of the heat conduction cones, during welding, the polycarbonate alloy shell is heated by laser heating or other heating sources, and under the heat conduction of the heat conduction cones, the preformed tin sheet is quickly melted and then drips to cover the surface to be welded and cured.

[0006] Preferably, a picking structure is further provided on the upper end surface of the polycarbonate alloy shell for the tweezers to clamp, which is convenient for the tweezers to clamp the polycarbonate alloy shell and position it for placement.

[0007] Preferably, a picking clamping plate protruding upward is fixedly provided on the upper end surface of the polycarbonate alloy shell. The material of the picking clamping plate is the same as that of the polycarbonate alloy shell. In this way, the picking clamping plate is convenient for the tweezers to clamp, and it is convenient to place and take the polycarbonate alloy shell.

[0008] Preferably, two picking holes are fixedly arranged on the upper end surface of the polycarbonate alloy shell, and the picking holes are blind holes, which facilitates clamping with tweezers and ensures the flatness of the front and back sides of the polycarbonate alloy shell, facilitating storage.

[0009] Preferably, the lower end surface of the preformed tin sheet does not extend beyond the lower end surface of the polycarbonate alloy shell, and there is a gap between the lower end surface of the preformed tin sheet and the surface of the component to be welded after the lower end surface of the polycarbonate alloy shell covers the electronic board.

[0010] Preferably, a hot-melt filling gap surrounding the preformed tin sheet is left between the inside of the polycarbonate alloy shell and the preformed tin sheet. When the preformed tin sheet melts and accumulates on the surface of the component to be welded, it will spread outwards. By means of the redundancy of the hot-melt filling gap, it is avoided that the preformed tin sheet contacts the polycarbonate alloy shell again after melting. In this way, after welding is completed, the preformed tin sheet is not connected to the polycarbonate alloy shell again after solidifying and forming, which facilitates taking the polycarbonate alloy shell and is convenient for recycling.

[0011] The advantages and positive effects of the present utility model are:

[0012] 1. Facilitate the positioning of the welding sheet.

[0013] 2. Separate the outside during welding to avoid the intrusion of impurities.

[0014] 3. The high thermal conductivity material facilitates the rapid melting of the tin sheet and confines it within the polycarbonate alloy shell until it solidifies and forms. Description of the Drawings

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0016] Figure 1 is a top perspective structural schematic diagram of the present utility model;

[0017] Figure 2 is a top perspective structural schematic diagram of the present utility model (another embodiment);

[0018] Figure 3 is a bottom perspective structural schematic diagram of the present utility model. Detailed Description of the Preferred Embodiment

[0019] The present utility model will now be further described in detail with reference to the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0020] The following will further describe the embodiments of the present utility model in detail with reference to the drawings:

[0021] AsFigures 1-3 As shown in the figure, a preformed solder sheet of the present utility model includes a polycarbonate alloy shell 10 with a downward opening. Inside the polycarbonate alloy shell 10, heat-conducting cones 14 with downward tips are arranged at intervals. The heat-conducting cones 14 are made of titanium alloy material, and the upper end surfaces of the heat-conducting cones 14 are exposed from the upper end surface of the polycarbonate alloy shell 10. A preformed tin sheet 13 is fixedly cured on the heat-conducting cones 14. Since the heat-conducting performance of the polycarbonate alloy shell 10 is much lower than that of the heat-conducting cones 14, during welding, the polycarbonate alloy shell 10 is heated by laser heating or other heating sources, and under the heat conduction of the heat-conducting cones 14, the preformed tin sheet 13 is quickly melted and then drips to cover the surface to be welded and cured.

[0022] Preferably, a picking structure is further provided on the upper end surface of the polycarbonate alloy shell 10 for the tweezers to clamp, which is convenient for the tweezers to clamp the polycarbonate alloy shell 10 and place it in position.

[0023] Preferably, a picking clamping plate 12 protruding upward is fixedly provided on the upper end surface of the polycarbonate alloy shell 10. The material of the picking clamping plate 12 is the same as that of the polycarbonate alloy shell 10. In this way, the picking clamping plate 12 is convenient for the tweezers to clamp, and it is convenient to place and pick up the polycarbonate alloy shell 10.

[0024] Preferably, two picking holes 11 are fixedly provided on the upper end surface of the polycarbonate alloy shell 10, and the picking holes 11 are blind holes. This is convenient for the tweezers to clamp, and it ensures the flatness of the front and back sides of the polycarbonate alloy shell 10, which is convenient for storage.

[0025] Preferably, the lower end surface of the preformed tin sheet 13 does not extend beyond the lower end surface of the polycarbonate alloy shell 10. When the lower end surface of the polycarbonate alloy shell 10 covers the electronic board, there is a gap between the lower end surface of the preformed tin sheet 13 and the surface of the component to be welded.

[0026] Preferably, a hot-melt filling gap 15 surrounding the preformed tin sheet 13 is left between the inside of the polycarbonate alloy shell 10 and the preformed tin sheet 13. When the preformed tin sheet 13 is melted and accumulated on the surface of the component to be welded, it will spread outward. The redundancy of the hot-melt filling gap 15 prevents the preformed tin sheet 13 from contacting the polycarbonate alloy shell 10 again after melting. In this way, after welding is completed, the preformed tin sheet 13 is not connected to the polycarbonate alloy shell 10 after solidifying again, which is convenient to pick up the polycarbonate alloy shell 10 and is convenient for recycling.

[0027] It should be emphasized that the embodiments described in the present utility model are illustrative rather than restrictive. Therefore, the present utility model is not limited to the embodiments described in the specific implementation manners. Any other implementation manners obtained by those skilled in the art based on the technical solutions of the present utility model also fall within the scope of protection of the present utility model.

Claims

1. A solder preform, characterized in that: The invention comprises a downwardly open polycarbonate alloy shell (10), wherein heat-conducting cones (14) with their tips pointed downward are arranged at intervals in the polycarbonate alloy shell (10), wherein the heat-conducting cones (14) are made of a titanium alloy material, and the upper end surface of the heat-conducting cones (14) is exposed from the upper end surface of the polycarbonate alloy shell (10), and a preformed tin sheet (13) is fixedly fixed on the heat-conducting cones (14).

2. A solder preform according to claim 1, characterized in that: A picking structure is also provided on the upper end surface of the polycarbonate alloy shell (10) for being picked up by tweezers.

3. The solder preform according to claim 2, characterized in that: A pick-up clamping plate (12) protruding upward is fixedly provided on the upper end surface of the polycarbonate alloy shell (10), and the material of the pick-up clamping plate (12) is consistent with that of the polycarbonate alloy shell (10).

4. The solder preform according to claim 3, characterized in that: Two pick-up holes (11) are fixedly provided on the upper end surface of the polycarbonate alloy shell (10), and the pick-up holes (11) are blind holes.

5. The solder preform according to claim 4, characterized in that: The lower end surface of the preformed tin sheet (13) does not extend beyond the lower end surface of the polycarbonate alloy shell (10); when the lower end surface of the polycarbonate alloy shell (10) is covered on the electronic board, a gap exists between the lower end surface of the preformed tin sheet (13) and the surface of the component to be welded.

6. The solder preform according to claim 5, characterized in that: A hot-melt filling gap (15) surrounding the preformed tin sheet (13) is left between the inside of the polycarbonate alloy shell (10) and the preformed tin sheet (13). When the preformed tin sheet (13) is hot-melted and deposited on the surface of the component to be welded, it will diffuse outward. The redundancy of the hot-melt filling gap (15) prevents the preformed tin sheet (13) from contacting the polycarbonate alloy shell (10) again after hot-melting.

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