Nitrogen cover and tin soldering device

Abstract

The utility model relates to a nitrogen cover and a tin soldering device, and relates to the technical field of electronic component production, the nitrogen cover comprises a guide part and a straight barrel part, and the guide part is provided with a large-diameter end and a small-diameter end; the straight cylinder part is connected to the small-diameter end of the guide part and can be coaxially arranged with the nozzle; nitrogen sequentially passes through the guide part and the straight barrel part and then flows out of the nitrogen cover in the axis direction of the straight barrel part. According to the nitrogen cover, it can be guaranteed that nitrogen can be sprayed out of the nitrogen cover in the axis direction of the nozzle, a stable inert gas environment is provided for the welding process, and the welding quality is guaranteed.

Description

Technical Field

[0001] This application relates to the field of electronic component manufacturing technology, and in particular to a nitrogen hood and soldering apparatus. Background Technology

[0002] Soldering equipment is a welding device used in the production of electronic components. It melts solder through heating and, without melting the workpiece, forms an alloy layer on the workpiece surface using the wetting effect of the solder, thus achieving a mechanical and electrical connection. In the field of electronic component manufacturing technology, soldering equipment is widely used to ensure current conduction between electronic components and circuit boards.

[0003] The soldering equipment mainly includes a heating platform for heating the solder, a nozzle, and a nitrogen hood. Liquid metal is sprayed onto the workpiece through the nozzle. During the soldering process, nitrogen gas is output from the nitrogen hood toward the workpiece to provide an inert gas environment and ensure the soldering quality.

[0004] In related technologies, the nitrogen hood is set in a cone shape, which causes some nitrogen gas to flow out at an angle to the outside of the nitrogen hood. As a result, some nitrogen is not actually output to the area to be welded, and a sufficient inert gas environment is not provided, resulting in poor welding effect and low welding qualification rate of products.

[0005] In view of this, there is an urgent need to provide a nitrogen hood that can provide a stable and sufficient inert gas environment for the welding process and ensure welding quality. Utility Model Content

[0006] The purpose of this application is to provide a nitrogen hood and soldering device that can ensure that nitrogen gas can be ejected from the nitrogen hood along the axial direction of the nozzle, providing a stable inert gas environment for the soldering process and ensuring soldering quality.

[0007] Firstly, the nitrogen hood provided in this application adopts the following technical solution:

[0008] A nitrogen shield, comprising:

[0009] The guide section has a large-diameter end and a small-diameter end;

[0010] The straight cylindrical section is connected to the small-diameter end of the guide section and can be coaxially arranged with the nozzle;

[0011] Nitrogen gas flows through the guide section and the straight cylinder section in sequence, and then flows out of the nitrogen hood along the axial direction of the straight cylinder section.

[0012] Furthermore, the inner diameter of the straight section is 1.4-1.6 times the outer diameter of the nozzle.

[0013] Furthermore, the length of the straight cylindrical portion is at least 1 / 2 of the length of the guide portion.

[0014] Furthermore, the guide portion includes a first connecting segment and a second connecting segment connected in sequence;

[0015] At least one of the first connecting section and the second connecting section is configured as a cone shape to gather nitrogen gas and accelerate the nitrogen gas flow rate.

[0016] Furthermore, the guide portion and the straight cylindrical portion are integrally formed.

[0017] Furthermore, both the guide portion and the outer surface of the straight cylindrical portion are provided with an anti-adhesion coating.

[0018] Furthermore, the large-diameter end of the guide portion is connected to a limiting portion, which is used to engage with the heating platform.

[0019] Furthermore, the limiting part includes:

[0020] Plug-in socket;

[0021] A ring plate is fixed to one end of the plug sleeve near the guide portion, and is used to abut against the upper surface of the heating platform.

[0022] Secondly, this application provides a soldering apparatus, including a heating platform, a nozzle, and the aforementioned nitrogen hood.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The nitrogen hood in this application includes a guide section and a straight section. Nitrogen gas is gathered in the guide section and enters the straight section at a higher flow rate. Then, the nitrogen gas flows out of the nitrogen hood along the length of the straight section. By passing through the guide section and the straight section, the flow direction of the nitrogen gas is kept consistent with the length direction of the nozzle, thereby ensuring that the nitrogen gas can fill the welding position and provide a stable inert gas environment for the welding process.

[0025] 2. The outer surface of the nitrogen hood in this application is provided with an anti-adhesion coating. When some of the hot molten solder drips onto the nitrogen hood, the anti-adhesion coating can cause the molten solder to flow down along the outer wall of the nitrogen hood, reducing the impact of the molten solder adhering to the outer surface of the nitrogen hood on the soldering operation. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the soldering device in this application.

[0027] Figure 2 This is a cross-sectional structural diagram of the nitrogen hood in this application.

[0028] Figure 3 This is a three-dimensional structural diagram of another form of the nitrogen hood in this application.

[0029] Figure 4 This is a three-dimensional structural diagram of other forms of nitrogen hoods in this application.

[0030] In the figure, 1 is the guide section; 11 is the large diameter end; 12 is the small diameter end; 13 is the first connecting section; 14 is the second connecting section; 2 is the straight section; 3 is the limiting section; 31 is the insertion sleeve; 32 is the ring plate; 4 is the heating platform; 5 is the nozzle; and 6 is the vent. Detailed Implementation

[0031] The following will be combined with the appendix Figure 1-4 The technical solution of this application is clearly and completely described. The following embodiments are exemplary and are only used to explain this application, and should not be construed as limiting this application. In the following description, the same reference numerals are used to denote the same or equivalent elements, and repeated descriptions are omitted.

[0032] In the description of this application, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this application and to simplify the description, and are not intended to indicate or imply that the equipment or component 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 application.

[0033] Furthermore, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] It should also be further understood that the term "and / or" as used in this application specification and the corresponding claims refers to any combination of one or more of the listed items and all possible combinations.

[0035] A soldering apparatus, as described above Figure 1 It includes a heating platform 4, a nozzle 5, and a nitrogen hood. The nitrogen hood is inserted into the heating platform 4, and the nozzle 5 extends out of the nitrogen hood and is retractably mounted on the heating platform 4.

[0036] During the soldering process, the heating platform 4 maintains a high temperature of 310±10° to heat the tin material and form liquid tin. The liquid tin is sprayed out through the nozzle 5 in a vertically upward direction, so that a solder layer is formed on the PCB (i.e., the soldering component), providing solder joints that can be electrically connected to the PCB.

[0037] Furthermore, the inner diameter of the nitrogen hood is larger than the outer diameter of the nozzle 5. When the nitrogen hood and the nozzle 5 are matched, an annular vent hole 6 is formed. Nitrogen gas is ejected from the vent hole 6 to provide an inert gas environment during the soldering process and ensure the quality of the soldering.

[0038] Reference Figure 1 and Figure 2 The outer surface of the nitrogen hood is provided with an anti-adhesion coating. In one specific embodiment, the anti-adhesion coating is a metal material coating, such as nickel, titanium, or nickel-titanium alloy. In another specific embodiment, the anti-adhesion coating can also be a composite coating, such as a TiN (titanium nitride) coating.

[0039] When some of the hot molten solder drips onto the outer surface of the nitrogen hood, the anti-adhesion coating allows the molten solder to flow down the outer wall of the nitrogen hood, reducing the impact of the molten solder adhering to the surface of the nitrogen hood on the soldering operation.

[0040] Furthermore, the nitrogen hood includes a guide section 1, a straight cylinder section 2, and a limiting section 3, which are integrally formed to improve the overall strength of the nitrogen hood. The guide section 1 includes a large-diameter end 11 and a small-diameter end 12. The straight cylinder section 2 is connected to the large-diameter end 11 of the guide section 1, and the limiting section 3 is connected to the small-diameter end 12 of the guide section 1.

[0041] The limiting part 3 is used for insertion and engagement with the heating platform 4. Specifically, refer to... Figure 1 In one specific embodiment, the heating platform 4 is provided with a plug hole, and the limiting part 3 includes a plug sleeve 31 and an annular plate 32. The outer diameter of the plug sleeve 31 is equal to the diameter of the plug hole, and the annular plate 32 is fixedly connected to one end of the plug sleeve 31 near the guide part 1.

[0042] When the nitrogen hood is inserted into the heating platform 4 via the limiting part 3, the insertion sleeve 31 is inserted into the insertion hole, and the ring plate 32 abuts against the upper surface of the heating platform 4. By setting the limiting part 3, the nitrogen hood can be positioned well.

[0043] It should be noted that the gas pressure formed by the flow of nitrogen inside the nitrogen hood is less than the weight of the nitrogen hood itself. When the nitrogen is ejected from the nitrogen hood, the nitrogen hood can still be stably set on the heating platform 4.

[0044] If it is necessary to further improve the ability of the nitrogen hood to be stably installed on the heating platform 4, in another specific embodiment, the outer diameter of the plug sleeve 31 can also be larger than the diameter of the plug hole, so that the plug hole and the heating platform 4 are interference fit.

[0045] Furthermore, referring to Figure 2 The guide section 1 includes a first connecting section 13 and a second connecting section 14 connected in sequence.

[0046] The first connecting section 13 is closer to the straight section 2 than the second connecting section 14. At least one of the first connecting section 13 and the second connecting section 14 is set in a conical shape. By setting the guide section 1 in a conical shape, the guide section 1 can be gathered before entering the straight section 2 to accelerate the nitrogen flow rate.

[0047] In one specific embodiment, the first connecting segment 13 or the second connecting segment 14 is configured as a cone shape.

[0048] When the second connecting segment 14 is set to a cone shape, refer to Figure 2 The first connecting section 13 is in the shape of a ring plate 32 and is parallel to the upper surface of the heating platform 4. When the first connecting section 13 is set in a conical shape, refer to... Figure 3 The second connecting section 14 is in the shape of a sleeve. At this time, the size of the second connecting section 14 can be the same as that of the plug sleeve 31 to facilitate processing.

[0049] The nitrogen gas is guided by the conical surface of the first connecting section 13 or the second connecting section 14, so that the nitrogen gas is gathered before entering the straight cylinder 2.

[0050] Reference Figure 4 In another specific embodiment, both the first connecting section 13 and the second connecting section 14 are cone-shaped. The cone angle of the first connecting section 13 is larger than that of the second connecting section 14. As the nitrogen flows from the guide section 1 to the straight cylinder section 2, it passes through the guide sections 13 and 14 in sequence. Through these two guidances, the nitrogen is better concentrated by the guide section 1.

[0051] Reference Figure 1 and Figure 2 The straight section 2 is coaxially arranged with the nozzle 5, and the length of the straight section 2 is at least 1 / 2 of the guide section 1. In a specific embodiment, the length of the straight section 2 is 0.6 times that of the guide section 1.

[0052] The longer straight section 2 can guide the flow of nitrogen gas, allowing the nitrogen gas to pass through the guide section 1 and the straight section 2 in sequence, and then flow out of the nitrogen hood in the axial direction of the straight section 2. Compared with the flow mode of nitrogen gas flowing out of the nitrogen hood at an inclined angle, the nitrogen gas can more fully fill the position to be welded, thus reducing the ineffective output of nitrogen gas.

[0053] Furthermore, the inner diameter of the straight cylinder 2 is 1.4-1.6 times the outer diameter of the nozzle 5. In a specific embodiment, the inner diameter of the straight cylinder 2 is 1.5 times the outer diameter of the nozzle 5. Specifically, the inner diameter of the straight cylinder 2 is set to 12 mm, and the outer diameter of the nozzle 5 is set to 8 mm, thereby forming a 2 mm annular vent 6.

[0054] The smaller vent 6 can increase the flow rate of nitrogen while ensuring that the nitrogen output remains constant, thereby further increasing the effective output of nitrogen.

[0055] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A nitrogen hood, characterized in that, include: The guide section (1) has a large-diameter end (11) and a small-diameter end (12). The straight section (2) is connected to the small-diameter end (12) of the guide section (1) and can be coaxially arranged with the nozzle (5); Nitrogen gas passes through the guide section (1) and the straight cylinder section (2) in sequence, and then flows out of the nitrogen hood along the axial direction of the straight cylinder section (2). The guide section (1) includes a first connecting section (13) and a second connecting section (14) connected in sequence. At least one of the first connecting section (13) and the second connecting section (14) is set in a cone shape to gather nitrogen gas and accelerate the flow rate of nitrogen gas. The large-diameter end (11) of the guide part (1) is connected to a cylindrical limiting part (3), which is used to be inserted into the heating platform (4).

2. A nitrogen hood according to claim 1, characterized in that, The inner diameter of the straight section (2) is 1.4-1.6 times the outer diameter of the nozzle (5).

3. A nitrogen hood according to claim 1 or 2, characterized in that, The length of the straight section (2) is at least 1 / 2 of the length of the guide section (1).

4. A nitrogen hood according to claim 1, characterized in that, The outer surfaces of both the guide portion (1) and the straight cylindrical portion (2) are provided with an anti-adhesion coating.

5. A nitrogen hood according to claim 1, characterized in that, The limiting part (3) includes: Plug-in sleeve (31); The ring plate (32) is fixed to one end of the plug sleeve (31) near the guide portion (1) and is used to abut against the upper surface of the heating platform (4).

6. A nitrogen hood according to claim 1, characterized in that, The limiting part (3), the guiding part (1) and the straight cylindrical part (2) are integrally formed.

7. A soldering apparatus, characterized in that, It includes a heating platform (4), a nozzle (5), and a nitrogen hood as described in any one of claims 1-6.

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