A soldering tip for soldering capacitors
By introducing flow channels and multi-sided contact structures into the soldering nozzle, the problem of uneven soldering was solved, achieving directional flow and uniform distribution of molten solder, thus improving soldering efficiency and material utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN SHUNDE CHUANGGE ELECTRONIC IND CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-06-30
AI Technical Summary
The solid structure of existing soldering nozzles makes it difficult to achieve uniform welding between capacitors and copper bars, resulting in uneven heat transfer and difficulty in controlling solder flow, which affects welding efficiency and material utilization.
The design incorporates flow channels and multi-sided contact welding cavities to guide the molten solder to flow evenly to the welding points, ensuring multi-sided contact and directional flow. Combined with inclined flow guide surfaces and arc guide surfaces, this improves welding efficiency and material utilization.
It achieves uniform distribution of molten solder during the soldering process, reduces the risk of cold solder joints, improves soldering strength and efficiency, and reduces solder waste.
Smart Images
Figure CN224424498U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of capacitor welding technology, and in particular to a welding nozzle for welding capacitors. Background Technology
[0002] Most soldering nozzles currently available on the market are solid, and this general-purpose design cannot meet the specific requirements of soldering capacitors to copper strips. In actual soldering operations, because the connection points between capacitor contacts and copper strips are mostly flat, solid soldering nozzles often only achieve single-sided or partial contact. This contact method leads to uneven heat transfer, resulting in some areas being too hot and others too cold, preventing the solder at the solder joint from melting evenly. Operators need to frequently adjust the angle and position of the soldering nozzle, which is time-consuming and affects production efficiency.
[0003] Meanwhile, during soldering, the solder melts only from one side, and its flow direction is difficult to control due to the lack of effective guidance as it flows towards the solder joint. This not only leads to irregular solder joint shapes and problems such as cold solder joints, but also prevents the full utilization of solder, resulting in solder waste. Utility Model Content
[0004] In order to overcome at least one of the defects of the prior art, the present invention provides a capacitor soldering tip for welding, which effectively guides the flow of molten solder to the welding point by setting a flow guide groove, thereby effectively improving welding efficiency and solder utilization.
[0005] The technical solution adopted by this utility model to solve its problem is:
[0006] A soldering tip for soldering capacitors, comprising:
[0007] The welding nozzle body has a welding part, the welding part is provided with a welding cavity and a guide groove, the welding cavity extends through the welding part in a first direction; the welding cavity has a first opening, the first opening communicates with the welding cavity in a second direction;
[0008] The guide channel is disposed on the side wall of the welding cavity and extends through the welding cavity along the first direction, and is used to guide the molten solder into the welding cavity.
[0009] Furthermore, the welding cavity has a second opening, which communicates with the welding cavity along the first direction; the first opening communicates with the welding cavity along the second direction.
[0010] The end wall of the second opening is provided with a first flow guiding surface, which extends along the first direction to the soldering cavity and is used to guide the molten solder into the soldering cavity.
[0011] Furthermore, there are two first guide surfaces, which are located on both sides of the second opening and extend to the welding cavity along the first direction respectively.
[0012] Furthermore, the first guiding surface includes a first guiding slope, which slopes from top to bottom along a first direction.
[0013] Furthermore, the inner wall of the guide channel has a second guide surface, which penetrates the guide channel along the first direction and is used to guide the molten solder into the guide channel.
[0014] Furthermore, the second guiding surface includes a second guiding slope, which slopes from top to bottom along the first direction.
[0015] Furthermore, the first opening is provided with arc-shaped guide surfaces on both sides, and the arc-shaped guide surfaces extend to the welding cavity along the second direction.
[0016] Furthermore, the welding part is provided with guide slopes on both sides, the guide slopes are inclined from top to bottom along the second direction and are set at an angle to the periphery of the welding nozzle body.
[0017] Furthermore, the end of the welding nozzle body away from the welding part is also provided with a connecting part, which is connected to the external structure.
[0018] Furthermore, the welding nozzle body is also provided with a protrusion that extends circumferentially along the welding nozzle body and is located between the welding part and the connecting part.
[0019] In summary, the soldering nozzle for welding capacitors provided by this utility model has the following technical effects: During welding, the capacitor insert is inserted into the welding cavity along the first opening. Because the inner wall of the welding cavity is provided with a flow guide groove, the molten solder can flow in a direction along a preset path to the welding area of the capacitor insert under the guidance of the flow guide groove, thereby reducing the risk of cold solder joints and improving the welding effect.
[0020] In addition, because the welding cavity and the insert plate cooperate, the insert plate completes the positioning in the cavity, which also fixes the relative position of the welding nozzle and the welding part. During the entire welding process, the operator does not need to repeatedly adjust the welding nozzle angle, which indirectly improves the welding efficiency. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of this utility model;
[0023] Figure 2 This is a schematic diagram from another perspective of the present invention;
[0024] Figure 3 This is a schematic diagram from another perspective of the present invention.
[0025] The meanings of the reference numerals in the attached figures are as follows:
[0026] 10. Welding nozzle body; 11. Welding part; 111. Welding cavity; 1111. First opening; 1112. Second opening; 1113. First guide surface; 1114. Arc guide surface; 1115. Guide slope; 112. Guide groove; 1121. Second guide surface; 12. Connecting part; 13. Protrusion. Detailed Implementation
[0027] 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 protection scope of the present utility model.
[0028] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0029] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.
[0030] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.
[0031] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.
[0032] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.
[0033] See Figures 1 to 3 This utility model discloses a soldering nozzle for welding capacitors, comprising: a soldering nozzle body 10, the soldering nozzle body 10 having a welding part 11, the welding part 11 having a welding cavity 111 and a guide groove 112, the welding cavity 111 penetrating the welding part 11 along a first direction, the welding cavity 111 having a first opening 1111, the first opening 1111 communicating with the welding cavity 111; the guide groove 112 is disposed on the side wall of the welding cavity 111 and penetrates the welding cavity 111 along the first direction, and guides molten solder into the welding cavity 111.
[0034] Based on the above structure, taking the radial direction (i.e., the vertical direction) of the welding nozzle body 10 as an example, during assembly, the welding cavity 111 can be set as a hollow shape. During use, the capacitor insert can be inserted into the welding cavity 111 through the first opening 1111 to the guide groove 112. At this time, the insert is completely surrounded by the inner wall of the welding cavity 111, realizing multi-sided contact between the welding nozzle and the insert. At the same time, the copper sheet to be welded is placed below or to the side of the capacitor insert, so that the areas to be welded are tightly attached to form a stable welding interface, and this interface is within the effective range of the welding cavity 111.
[0035] When the soldering nozzle body is energized and heated, the inner wall of the soldering cavity 111 heats up rapidly. Because the inner wall of the soldering cavity 111 makes multi-sided contact with the capacitor contacts, heat can be evenly transferred to multiple sides of the contacts through thermal conduction. Compared to the single-sided heat transfer of traditional soldering nozzles, this multi-sided contact method makes the contacts heat up more evenly, avoiding localized overheating or cold soldering. Uniform heat conduction allows the solder placed in the soldering area to melt synchronously, ensuring consistent temperature conditions during the soldering process.
[0036] More specifically, since the flow channel 112 is located on the side wall of the welding cavity 111 and extends vertically through the cavity, the inlet of the flow channel 112 is close to the outside of the welding cavity 111, and the outlet leads to the inner wall of the welding cavity 111. When the solder is heated and melted, due to the constraint of the flow channel 112 wall, the molten solder can only flow into the welding cavity 111 along the flow channel 112 wall under gravity. After the molten solder flows into the welding cavity 111 through the flow channel 112, since the capacitor contacts and copper plates are already tightly bonded and within the welding cavity 111, the molten solder quickly fills the gap between the capacitor contacts and copper plates, ensuring that each part of the capacitor contacts is fully covered by the molten solder and tightly connected to the copper plates. As the molten solder cools and solidifies, a strong solder joint is formed between the contacts and the copper plates. The presence of multiple solder surfaces significantly improves the welding strength and stability.
[0037] Throughout the welding process, the flow direction of the molten solder is constrained by the walls of the guide channel 112 and the welding cavity 111, effectively avoiding the problem of disordered flow of molten solder during traditional unilateral melting. This flow control results in regular and full solder joints, greatly reducing the risk of cold solder joints. Furthermore, because the guide channel 112 directs the molten solder directly to the welding area, it reduces solder splashing or accumulation, ensuring full utilization of the solder and effectively improving material utilization.
[0038] Furthermore, the welding cavity 111 has a second opening 1112, which communicates with the welding cavity 111 along a first direction; the first opening 1111 communicates with the welding cavity 111 along a second direction; the end wall of the second opening 1112 is provided with a first guide surface 1113, which extends to the welding cavity 111 along the first direction and guides the molten solder into the welding cavity 111.
[0039] Specifically, the second opening 1112 is connected to the welding cavity 111 along the first direction (vertical direction), while the first opening 1111 is connected to the welding cavity 111 along the second direction (horizontal direction), forming a cross-shaped three-dimensional structure. A first guide surface 1113 is provided on the end wall of the second opening 1112. This guide surface is specifically designed to be inclined or arc-shaped, extending from the end wall of the opening into the welding cavity 111 along the first direction, with its end smoothly connecting to the inner wall of the welding cavity 111, providing a directional channel for the molten solder to flow in.
[0040] Thus, during the soldering operation, in addition to adding solder through the guide channel 112, solder can also be placed at the second opening 1112. When the solder melts due to heat, the liquid solder will slide down along the first guide surface 1113 under the action of gravity. The inclined angle or arc design of the first guide surface 1113 allows the liquid solder to maintain a continuous flow state and be guided into the soldering cavity 111 during the flow process due to the combined action of surface tension and friction. At this time, part of the liquid solder flows into the side wall of the soldering cavity 111 through the guide channel 112, and the other part flows into the top of the soldering cavity 111 through the second opening 1112 and the first guide surface 1113. After the two merge in the soldering cavity 111, the distribution of the liquid solder in the soldering cavity 111 is more uniform, avoiding the problem of too much or too little solder in some areas, so as to make the solder joint more regular and full, and improve the soldering strength.
[0041] In addition, the guiding effect of the first guide surface 1113 can effectively reduce solder splashing and waste, and further improve material utilization.
[0042] More specifically, in this embodiment, there are two first guide surfaces 1113. These two first guide surfaces 1113 are located on both sides of the second opening 1112 and extend along the first direction to the welding cavity 111. During welding, solder can be placed on the first guide surfaces 1113 on both sides. After the solder melts upon heating, the molten solder flows into the welding cavity 111 under the guidance of the symmetrically distributed first guide surfaces 1113, creating a symmetrical flow pattern within the cavity. At this time, the first guide surfaces 1113 on both sides evenly distribute the molten solder to different areas of the welding cavity 111. Compared to a single guide surface, the dual guide surfaces effectively avoid localized accumulation or uneven distribution of molten solder caused by unilateral inflow. This avoids differences in welding strength caused by molten solder bias to one side, ensuring consistent solder volume across all parts of the solder joint and improving welding consistency and reliability.
[0043] Preferably, the first guide surface 1113 includes a first guide slope, which is inclined from top to bottom along a first direction (such as the vertical direction) to provide a clear and stable gravity-driven path for the molten solder. The molten solder is mainly affected by gravity on the slope, and its flow direction and speed can be controlled by the slope angle, so that it can flow into the soldering cavity 111 at a faster and more stable speed, effectively reducing the residence time of the molten solder on the guide surface, so that the molten solder can quickly reach the soldering area and meet the requirements of rapid soldering.
[0044] Furthermore, the inner wall of the flow channel 112 has a second flow guiding surface 1121, which extends through the flow channel 112 along the first direction and is used to guide the molten solder into the flow channel 112. The second flow guiding surface 1121 establishes a clear path for the flow of molten solder within the flow channel 112, utilizing surface constraints and gravity to prevent disordered diffusion or stagnation of the molten solder within the channel, thus ensuring a rapid and stable flow of the molten solder into the soldering cavity 111. This stable flow direction allows the molten solder to evenly cover the soldering area, reducing problems such as uneven solder joints and cold solder joints caused by turbulent solder flow, indirectly enhancing the soldering strength.
[0045] Preferably, the second guide surface 1121 in this embodiment includes a second guide slope. The second guide slope is inclined from top to bottom along the first direction (vertical direction), providing a clear and stable gravity-driven path for the molten solder. The molten solder is mainly subjected to gravity on the slope, and its flow direction and speed can be controlled by the slope angle, so that it can flow into the welding cavity 111 at a faster and more stable speed, so that the molten solder can quickly reach the welding area and meet the requirements of rapid welding.
[0046] Furthermore, the first opening 1111 is provided with arc-shaped guide surfaces 1114 on both sides, and the arc-shaped guide surfaces 1114 extend to the welding cavity 111 along the second direction.
[0047] Specifically, during the process of inserting the capacitor insert into the welding cavity 111 through the first opening 1111, the arc-shaped guide surfaces 1114 on both sides of the first opening 1111 act as guides and buffers. Compared to right angles or sharp edges, the arc structure reduces friction and collision between the capacitor insert and the first opening 1111. Operators can smoothly slide the insert along the arc-shaped guide surfaces 1114 into the welding cavity 111 until it reaches the predetermined position without having to manually adjust the insert angle, indirectly improving assembly efficiency and reducing the risk of damage to the insert edges.
[0048] More specifically, the welding section 11 is also provided with guide slopes 1115 on both sides. The guide slopes 1115 slope downwards along the second direction and are set at an angle to the periphery of the welding nozzle body 10. When the operator holds the welding nozzle, the presence of the guide slopes 1115 creates a certain angle between the welding nozzle body 10 and the welding worktable. This angle (which can be 80°) matches the range of motion of the arm and wrist when the operator holds the welding nozzle. For example, in normal manual operation, the wrist drives the welding nozzle to perform welding actions. The angle allows the relative position of the welding nozzle body 10 and the worktable to match the comfortable angle of hand force and movement, eliminating the need for excessive wrist bending. This maintains a natural and effortless operating posture, reducing fatigue and soreness caused by excessive wrist twisting during long welding sessions.
[0049] Furthermore, a connecting part 12 is provided at the end of the welding nozzle body 10 away from the welding part 11. The connecting part 12 is connected to an external structure so that the welding nozzle can be connected to an external structure such as a welding station, the handle of a welding equipment, or a bracket through the connecting part 12 as an "interface".
[0050] The specific connecting part 12 can be a connecting rod or a connecting block or other structure provided on the welding nozzle body 10.
[0051] In addition, a protrusion 13 is provided on the solder nozzle body 10. The protrusion 13 extends circumferentially along the solder nozzle body 10 and is located between the soldering part 11 and the connecting part 12. The protrusion 13 separates the soldering part 11 (the working area, involving high temperature and molten solder flow) and the connecting part 12 (which connects to external equipment and needs to be relatively stable and clean) through the protrusion 13. During soldering, the solder slag and splashed molten solder generated by the soldering part 11 will be blocked by the protrusion 13, making it less likely to spread to the connecting part 12, avoiding contamination and damage to the connection structure, thus ensuring the long-term stable connection of the connecting part 12 and reducing connection loosening and poor contact problems caused by solder slag accumulation.
[0052] It should be noted that the protrusion 13 can be an annular block structure that extends circumferentially along the welding nozzle body 10, such as a protrusion ring.
[0053] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.
Claims
1. A soldering tip for welding capacitors, characterized in that, include: The welding nozzle body has a welding part, the welding part is provided with a welding cavity and a flow guide groove, and the welding cavity extends through the welding part along a first direction; The welding cavity has a first opening, and the first opening communicates with the welding cavity; The guide channel is disposed on the side wall of the welding cavity and extends through the welding cavity along the first direction, and is used to guide the molten solder into the welding cavity.
2. The soldering tip for welding capacitors as described in claim 1, characterized in that, The welding cavity has a second opening, which communicates with the welding cavity along the first direction; the first opening communicates with the welding cavity along the second direction. The end wall of the second opening is provided with a first flow guiding surface, which extends along the first direction to the soldering cavity and is used to guide the molten solder into the soldering cavity.
3. The soldering tip for welding capacitors as described in claim 2, characterized in that, The first guide surface is provided in two parts, which are located on both sides of the second opening and extend to the welding cavity along the first direction respectively.
4. The soldering tip for welding capacitors as described in claim 3, characterized in that, The first guiding surface includes a first guiding slope, which slopes from top to bottom along a first direction.
5. The soldering tip for welding capacitors as described in claim 2, characterized in that, The inner wall of the guide channel has a second guide surface, which penetrates the guide channel along the first direction and is used to guide the molten solder into the guide channel.
6. The soldering tip for welding capacitors as described in claim 5, characterized in that, The second guiding surface includes a second guiding slope, which slopes from top to bottom along the first direction.
7. The soldering tip for welding capacitors as described in any one of claims 2-6, characterized in that, The first opening has arc-shaped guide surfaces on both sides, and the arc-shaped guide surfaces extend to the welding cavity along the second direction.
8. The soldering tip for welding capacitors as described in claim 7, characterized in that, The welding part is also provided with guide slopes on both sides. The guide slopes are inclined from top to bottom along the second direction and are set at an angle to the periphery of the welding nozzle body.
9. The soldering tip for welding capacitors as described in any one of claims 1-6, characterized in that, The welding nozzle body is also provided with a connecting part at one end away from the welding part, and the connecting part is connected to the external structure.
10. The soldering tip for welding capacitors as described in claim 9, characterized in that, The welding nozzle body is also provided with a protrusion that extends circumferentially along the welding nozzle body and is located between the welding part and the connecting part.