A control board selection welding device

Abstract

The utility model discloses a control panel selects and welds welding device, include: air duct seat, be provided with detachable protective gas cover on it, and one end of gas supply pipe is connected nitrogen gas source, and the other end is communicated to air duct seat relevantly, tin spraying nozzle is set up in the protective gas cover, wherein, the bottom of protective gas cover is provided with connecting flange, and locking bolt is connected on the air duct seat after passing connecting flange, is provided with arc hole on connecting flange, and locking bolt is set up in arc hole, and one end of arc hole is provided with counterbore portion of shape matching locking bolt head portion. Compared with prior art, the utility model solves the inconvenient problem of dismounting and maintaining of tin spraying nozzle of control panel selects and welds welding device.

Description

Technical Field

[0001] This utility model relates to the field of PCB processing technology, and in particular to a selective soldering device for control boards. Background Technology

[0002] Wave soldering refers to the process of spraying molten solder into a designed wave shape using an electric or electromagnetic pump, allowing a printed circuit board (PCB) pre-loaded with components to pass through the solder wave, thus achieving mechanical and electrical connections between the component solder tips or leads and the PCB pads.

[0003] When components are currently soldered using wave soldering on control boards, the occurrence rate of foreign matter during soldering reaches 0.5%, affecting product manufacturing quality. Furthermore, poor solder quality can easily lead to a high incidence of short circuits, cold solder joints, and solder holes.

[0004] Therefore, to improve the soldering quality of the control board, selective soldering can be used. In existing selective soldering devices, a protective gas shield is installed outside the solder spray nozzle to blow protective gas into the surrounding space of the nozzle. Nitrogen gas is used to isolate air from contact with liquid solder, thereby improving soldering quality.

[0005] However, the protective gas shield makes it inconvenient to disassemble and assemble the solder spray nozzle, affecting the disassembly, assembly, and maintenance of the solder spray nozzle. Utility Model Content

[0006] The purpose of this utility model is to provide a selective soldering device for control boards, so as to solve the problem of inconvenient disassembly and maintenance of the solder spray nozzle of the selective soldering device for control boards.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a control board selective welding device, comprising:

[0008] The air duct base is equipped with a detachable protective gas cover. One end of the gas supply pipe is connected to a nitrogen gas source, and the other end is connected to the air duct base.

[0009] The solder nozzle is inserted into the protective gas shield;

[0010] The bottom of the protective air cover is provided with a connecting flange. The locking bolt passes through the connecting flange and is threaded onto the air duct seat. The connecting flange is provided with an arc-shaped hole. The locking bolt passes through the arc-shaped hole. One end of the arc-shaped hole is provided with an enlarged hole that matches the shape of the locking bolt head.

[0011] As a further description of the above technical solution:

[0012] The air duct base is equipped with three locking bolts arranged around the circumference of the solder nozzle.

[0013] As a further description of the above technical solution:

[0014] The surface of the air duct seat is provided with a boss, and the side of the connecting flange is provided with an annular retaining edge that matches the shape of the boss.

[0015] As a further description of the above technical solution:

[0016] At least one gasket is provided between the connecting flange and the air duct seat.

[0017] As a further description of the above technical solution:

[0018] The washer is a rubber ring.

[0019] As a further description of the above technical solution:

[0020] The lower surface of the washer ring is provided with a first annular groove that matches the shape of the boss, and the upper surface of the washer ring is provided with a second annular groove that matches the shape of the annular retaining edge.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0022] 1. In this utility model, the protective gas cover on the outside of the solder spray nozzle in the selective soldering device of the control board adopts a detachable design to facilitate the installation and removal of the solder spray nozzle. When removing the protective gas cover, simply rotate the protective gas cover horizontally so that the enlarged part of the arc-shaped hole on the connecting flange of the protective gas cover is aligned with the head of the locking bolt, and then lift the protective gas cover upward to remove it.

[0023] 2. In this utility model, at least one washer is provided between the connecting flange and the air duct seat. The rod of the locking bolt passes through the washer. The washer can adjust the distance between the top of the protective gas cover and the top of the solder spray nozzle, effectively controlling the protective effect of nitrogen on the solder spray. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of a selective welding device for a control board.

[0026] Figure 2 This is a schematic diagram of the rotation and disassembly of the protective gas cover in a selective welding device for a control board.

[0027] Figure 3 This is a structural breakdown diagram of a selective welding device for a control board.

[0028] Figure 4 This is a schematic diagram of the gasket ring in a selective welding device for a control board.

[0029] Legend:

[0030] 1. Air duct seat; 11. Protective gas cover; 111. Connecting flange; 112. Arc-shaped hole; 1121. Enlarged hole section; 12. Gas supply pipe; 13. Boss; 2. Solder nozzle; 3. Locking bolt; 4. Washer ring; 41. First annular groove; 42. Second annular groove. Detailed Implementation

[0031] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1

[0033] Please see Figure 1-4 This utility model provides a technical solution: a control board selective welding device, comprising:

[0034] The air duct seat 1 is equipped with a detachable protective gas cover 11. One end of the gas supply pipe 12 is connected to a nitrogen gas source, and the other end is connected to the air duct seat 1.

[0035] Solder nozzle 2, which is installed in protective gas cover 11;

[0036] The bottom of the protective air cover 11 is provided with a connecting flange 111. The locking bolt 3 passes through the connecting flange 111 and is threaded onto the air duct seat 1. The connecting flange 111 is provided with an arc-shaped hole 112. The locking bolt 3 passes through the arc-shaped hole 112. One end of the arc-shaped hole 112 is provided with an enlarged hole 1121 that matches the shape of the head of the locking bolt 3.

[0037] The air duct seat 1 is equipped with three locking bolts 3 arranged around the circumference of the solder nozzle 2, which effectively ensures the locking effect of the protective air cover 11.

[0038] Working Principle: In the selective soldering device of the control board, the protective gas cover 11 on the outside of the solder spray nozzle 2 is designed to be detachable, facilitating the installation and removal of the solder spray nozzle 2. To remove the protective gas cover 11, simply rotate it horizontally until the enlarged portion 1121 of the arc-shaped hole 112 on the connecting flange 111 of the protective gas cover 11 aligns with the head of the locking bolt 3, then lift the protective gas cover 11 upwards for removal. Conversely, to install the protective gas cover 11, the head of the locking bolt 3 presses against and positions the connecting flange 111.

[0039] Example 2

[0040] Based on the above embodiments, this embodiment further improves upon the following technical solutions: a boss 13 is provided on the surface of the air duct seat 1, and an annular retaining edge with a matching shape is provided on the side of the connecting flange 111, thereby improving the sealing performance of the protective air cover 11 during installation and preventing the protective air cover 11 from shifting position.

[0041] Example 3

[0042] This embodiment further improves upon the above embodiment by providing the following technical solution: at least one washer 4 is provided between the connecting flange 111 and the air duct seat 1. The rod of the locking bolt 3 passes through the washer 4, and the washer 4 can adjust the distance between the top of the protective gas cover 11 and the top of the solder spray nozzle 2, effectively controlling the protective effect of nitrogen on the solder spray.

[0043] In addition, the lower surface of the washer 4 is provided with a first annular groove 41 that matches the shape of the boss 13, and the upper surface of the washer 4 is provided with a second annular groove 42 that matches the shape of the annular retaining edge. This makes the washer 4 well positioned during installation, and the upper and lower washer 4 can also be joined together through the first annular groove 41 and the second annular groove 42.

[0044] Specifically, the gasket 4 can be a rubber ring to further improve the sealing performance of the protective gas cover 11 during installation.

[0045] 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 selective welding device for control boards, characterized in that, include: The air duct base is equipped with a detachable protective gas cover. One end of the gas supply pipe is connected to a nitrogen gas source, and the other end is connected to the air duct base. A solder nozzle, which is inserted into the protective gas shield; The bottom of the protective air cover is provided with a connecting flange. The locking bolt passes through the connecting flange and is threaded onto the air duct seat. The connecting flange is provided with an arc-shaped hole. The locking bolt passes through the arc-shaped hole. One end of the arc-shaped hole is provided with an enlarged hole portion that matches the shape of the locking bolt head.

2. The control board selective welding device according to claim 1, characterized in that, The air duct base is provided with three locking bolts arranged around the circumference of the solder nozzle.

3. The selective welding device for a control board according to claim 1, characterized in that, The surface of the air duct seat is provided with a boss, and the side of the connecting flange is provided with an annular retaining edge that matches the shape of the boss.

4. The control board selective welding device according to claim 3, characterized in that, At least one gasket is provided between the connecting flange and the air duct seat.

5. The selective welding device for a control board according to claim 4, characterized in that, The gasket is a rubber ring.

6. The selective welding device for a control board according to claim 4, characterized in that, The lower surface of the washer ring is provided with a first annular groove whose shape matches the boss, and the upper surface of the washer ring is provided with a second annular groove whose shape matches the annular retaining edge.

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