Pin welding head and welding equipment
By designing a pin welding head with welding avoidance groove and arc groove, the problem of difficult to control via hole offset and solder diffusion in traditional welding is solved, and the welding effect with high precision and effective control is achieved.
Patent Information
- Application Number
- CN202422158502.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-03
AI Technical Summary
During the welding process of traditional pin-type devices, due to the lack of limiting pins, the via welding is offset, which affects the welding accuracy and is difficult to control the solder diffusion range.
A pin welding head is designed, including a welding seat and a heating block. The bottom side of the welding seat is equipped with a welding avoidance groove and a welding arc groove. The arc welding surface of the welding arc groove is used to join the solder, and the welding arc groove is heated by the heating block to achieve efficient welding of the plug-in pins.
The displacement of the plug-in pins is avoided through the limit structure, the soldering accuracy is improved, and the diffusion range of the solder is controlled through the arc-shaped welding surface, avoiding the problem of excessive solder diffusion.
Smart Images
Figure CN222999818U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of encapsulation welding, and particularly to a pin soldering head and a soldering device. Background Art
[0002] After research by the inventor, it is found that with the rapid development of the semiconductor industry, components usually need to be integrated on a PCB circuit board, and some use pin-type devices (such as TSOT / SOT devices). The pins of the components and the vias of the PCB circuit board need to be soldered. The traditional method is to apply solder paste on the pin devices for via soldering. However, during the soldering process, since the pins are not limited, there is a problem of via soldering deviation, which affects the soldering accuracy, and it is difficult to control the diffusion range of the solder after it is formed. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a pin soldering head and a soldering device, which can avoid the problem of via soldering deviation, improve the soldering accuracy, and effectively control the diffusion range of the solder to prevent the solder from spreading too far.
[0004] The embodiments of the utility model are implemented as follows:
[0005] In a first aspect, the utility model provides a pin soldering head, which includes a soldering seat and a heating block. A soldering avoidance groove is arranged on the bottom side of the soldering seat. The soldering avoidance groove is used to avoid the plug pins on the circuit board. And a soldering arc groove is arranged in the middle of the bottom side of the soldering seat. The soldering arc groove communicates with the soldering avoidance groove. The heating block is arranged on the soldering seat and is used to heat the soldering arc groove. The soldering arc groove has an arc-shaped soldering surface, and the arc-shaped soldering surface is used to engage the solder at the plug pin and solder the plug pin on the circuit board.
[0006] In an optional embodiment, the width of the soldering avoidance groove is greater than or equal to the width of the soldering arc groove.
[0007] In an optional embodiment, both ends of the soldering avoidance groove penetrate through the opposite two side walls of the soldering seat respectively, and the soldering arc groove is arranged in the middle of the soldering avoidance groove.
[0008] In an optional embodiment, a heating column is also embedded in the soldering seat. One end of the heating column engages with the arc-shaped soldering surface, and the other end is connected to the heating block, which is used to transfer the heat in the heating block to the arc-shaped soldering surface.
[0009] In an optional embodiment, an arc-shaped heat conduction plate is arranged on the inner wall of the soldering arc groove. The arc-shaped heat conduction plate is connected to the heating column, and the arc-shaped heat conduction plate is used to form the arc-shaped soldering surface.
[0010] In an alternative embodiment, there are a plurality of the welding avoidance grooves, and the plurality of the welding avoidance grooves are arranged in parallel on the bottom side of the welding seat, and the welding arc grooves are arranged in the middle of each of the welding avoidance grooves.
[0011] In an alternative embodiment, heat dissipation grooves are further arranged between two adjacent welding avoidance grooves, and the heat dissipation grooves are parallel and spaced apart from the welding avoidance grooves.
[0012] In an alternative embodiment, the depth of the heat dissipation groove is greater than the depth of the welding avoidance groove.
[0013] In an alternative embodiment, the pin soldering head further includes a mounting post, and the mounting post is arranged at the top end of the welding seat and is used for connecting the soldering head on the soldering machine table.
[0014] In a second aspect, the present utility model provides a soldering device, including a soldering machine table and the pin soldering head according to any one of the foregoing embodiments. A soldering head is arranged on the soldering machine table, and the soldering head...
[0015] The beneficial effects of the embodiments of the present utility model include:
[0016] The present utility model provides a pin soldering head and a soldering device. A welding avoidance groove is arranged at the base of the welding seat, and the welding avoidance groove can avoid the plug-in pins on the circuit. At the same time, a welding arc groove communicated with the welding avoidance groove is arranged on the bottom side of the welding seat. The arc-shaped welding surface of the welding arc groove is joined to the solder at the plug-in pin, and a heating block is arranged on the welding seat to heat the welding arc groove. At the same time, the welding arc groove has an arc-shaped welding surface, and the arc-shaped welding surface can be used to solder the plug-in pin on the circuit board. During actual use, first, solder is added at the plug-in pin, and then the welding avoidance groove is aligned with the plug-in pin, so that the plug-in pin can pass through the welding avoidance groove to reach the welding arc groove. Under the high-temperature contact of the arc-shaped welding surface, the solder is welded to form an arc-shaped welding part. Compared with the prior art, for the pin soldering head provided by the present utility model, since the welding avoidance groove and the welding arc groove are used for limiting, the problem that the plug-in pin has a large displacement during the welding process is avoided, the problem of via welding deviation is avoided, the welding precision is improved, and a preset arc-shaped welding part is formed by using the welding arc groove, effectively controlling the diffusion range of the solder and avoiding the problem that the diffusion range of the solder is too large. Description of the Drawings
[0017] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a schematic structural diagram of the pin soldering head provided by the embodiment of the present utility model from the first perspective;
[0019] Figure 2 It is a schematic structural diagram of the pin soldering head provided by the embodiment of the present utility model from the second perspective;
[0020] Figure 3 It is a soldering schematic diagram of the pin soldering head provided by the embodiment of the present utility model;
[0021] Figure 4 It is a schematic structural diagram of the pin soldering head provided by the embodiment of the present utility model from the third perspective.
[0022] Icon:
[0023] 100 - Pin soldering head; 110 - Soldering base; 111 - Heating column; 130 - Heating block; 150 - Soldering avoidance groove; 170 - Soldering arc groove; 171 - Arc soldering surface; 173 - Arc heat conducting plate; 175 - Heat dissipation groove; 190 - Mounting post; 200 - Circuit board; 210 - Plug-in pin. Detailed implementation manners
[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.
[0026] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0028] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0029] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] As disclosed in the background art, in the existing TSOT / SOT packaging technology, it usually needs to weld the pins of the components and the vias on the PCB board. The traditional method is dot needle welding. During the welding process, due to the melting of the solder, the problem of via welding offset will occur, which will affect the welding accuracy. At the same time, the diffusion range of the solder is difficult to control.
[0031] Moreover, in the conventional technology, only single-point welding can be performed, the welding efficiency is low, and the cooling time after welding is long, and the cooling efficiency is low.
[0032] In order to solve the above problems, the embodiments of the present utility model provide a pin soldering head and a welding device. The specific structure and welding principle of the pin soldering head will be introduced in detail below.
[0033] First Embodiment
[0034] Please refer to Figures 1 to 4, this embodiment provides a pin soldering head 100, which can avoid the problem of via soldering offset, improve soldering accuracy, effectively control the solder diffusion range, and prevent the solder diffusion range from being too large. At the same time, it can improve the soldering efficiency and heat dissipation efficiency.
[0035] The pin soldering head 100 provided in this embodiment includes a soldering base 110 and a heating block 130. A soldering avoidance groove 150 is provided on the bottom side of the soldering base 110. The soldering avoidance groove 150 is used to avoid the plug-in pins 210 on the circuit board 200. And a soldering arc groove 170 is provided in the middle of the bottom side of the soldering base 110. The soldering arc groove 170 is communicated with the soldering avoidance groove 150. The heating block 130 is arranged on the soldering base 110 and is used to heat the soldering arc groove 170. The soldering arc groove 170 has an arc-shaped soldering surface 171. The arc-shaped soldering surface 171 is used to join the solder at the plug-in pins 210 and solder the plug-in pins 210 on the circuit board 200.
[0036] In this embodiment, a soldering avoidance groove 150 is provided on the base of the soldering base 110. The soldering avoidance groove 150 can avoid the plug-in pins 210 on the circuit. At the same time, a soldering arc groove 170 communicated with the soldering avoidance groove 150 is provided on the bottom side of the soldering base 110. The arc-shaped soldering surface 171 of the soldering arc groove 170 joins the solder at the plug-in pins 210, and the heating block 130 is arranged on the soldering base 110 to heat the soldering arc groove 170. At the same time, the soldering arc groove 170 has an arc-shaped soldering surface 171, which can use the arc-shaped soldering surface 171 to solder the plug-in pins 210 on the circuit board 200. In actual use, first add solder at the plug-in pins 210, then align the soldering avoidance groove 150 with the plug-in pins 210, so that the plug-in pins 210 can pass through the soldering avoidance groove 150 to reach the soldering arc groove 170. Under the high-temperature contact of the arc-shaped soldering surface 171, the solder is completed and soldered to form an arc-shaped soldering part. Due to the use of the soldering avoidance groove 150 and the soldering arc groove 170 for positioning, the problem of large displacement of the plug-in pins 210 during the soldering process is avoided, and the problem of via soldering offset is avoided, improving the soldering accuracy. Tonghua City uses the soldering arc groove 170 to form a preset arc-shaped soldering part, effectively controlling the solder diffusion range and preventing the solder diffusion range from being too large.
[0037] In this embodiment, the width of the soldering avoidance groove 150 is greater than or equal to the width of the soldering arc groove 170. Preferably, the width of the soldering avoidance groove 150 is slightly greater than the width of the soldering arc groove 170, so that the plug-in pins 210 and the solder can smoothly pass through the soldering avoidance groove 150 to reach the soldering arc groove 170, avoiding interference of the soldering avoidance groove 150 with the position of the plug-in pins 210. In addition, the widths involved in this embodiment all refer to the widths in the direction parallel to the PCB board.
[0038] Further, both ends of the welding avoidance groove 150 penetrate through two opposite side walls of the welding base 110 respectively, and the welding arc groove 170 is arranged in the middle of the welding avoidance groove 150. Specifically, both ends of the welding avoidance groove 150 penetrate through two side surfaces of the welding base 110 respectively, so as to form a through groove, and the welding arc groove 170 is arranged at the middle position of the welding avoidance groove 150, so that the function of avoiding the plug-in pin 210 can be realized from both ends.
[0039] In this embodiment, a heating column 111 is further embedded in the welding base 110. One end of the heating column 111 is joined to the arc-shaped welding surface 171, and the other end is connected to the heating block 130, and is used for transferring the heat in the heating block 130 to the arc-shaped welding surface 171. Specifically, the heating block 130 can be a resistive heating element, which is internally provided with a resistance wire and generates heat through external power supply. At the same time, the heating column 111 can be made of a material with good thermal conductivity, such as a copper column. The heating column 111 can quickly transfer the heat at the heating block 130 to the arc-shaped welding surface 171, so as to realize the welding heating of the solder therein. In other preferred embodiments of the present utility model, a plurality of heating columns 111 can be embedded in the welding base 110, and the plurality of heating columns 111 are arranged in parallel, so as to realize multi-point uniform heating.
[0040] It should be noted that here it is also possible not to use the heating column 111. Instead, the entire welding base 110 is made of a material with good thermal conductivity, such as a copper base, which can also realize welding heating.
[0041] In this embodiment, an arc-shaped heat conducting plate 173 is arranged on the inner wall of the welding arc groove 170. The arc-shaped heat conducting plate 173 is connected to the heating column 111, and the arc-shaped heat conducting plate 173 is used to form the arc-shaped welding surface 171. Specifically, the arc-shaped heat conducting plate 173 can be a copper plate, which is attached to the arc-shaped inner wall of the welding arc groove 170, and the outer surface of the arc-shaped heat conducting plate 173 constitutes the aforementioned arc-shaped welding surface 171. By adopting the arc-shaped heat conducting plate 173, uniform distribution of heat can be realized, and thus uniform heating can be realized.
[0042] In this embodiment, there are a plurality of welding avoidance grooves 150, and the plurality of welding avoidance grooves 150 are arranged in parallel on the bottom side of the welding base 110, and a welding arc groove 170 is arranged in the middle of each welding avoidance groove 150. Specifically, there can be two arc-shaped avoidance grooves, and the two welding avoidance grooves 150 are arranged at intervals and in parallel, and a welding arc groove 170 is arranged at the central position of each welding avoidance groove 150. By setting the double-arc design, two plug-in pins 210 can be welded simultaneously, greatly improving the welding efficiency.
[0043] In this embodiment, a heat dissipation groove 175 is further provided between two adjacent welding avoidance grooves 150. The heat dissipation groove 175 is parallel to and spaced from the welding avoidance groove 150. Specifically, the heat dissipation groove 175 can be a rectangular groove, and the distances between the heat dissipation groove 175 and the two welding avoidance grooves 150 are the same. By providing the heat dissipation groove 175 for heat dissipation, the heat dissipation efficiency can be greatly improved after welding, so as to achieve rapid cooling and facilitate detachment from the welding base 110.
[0044] In this embodiment, the depth of the heat dissipation groove 175 is greater than the depth of the welding avoidance groove 150. Specifically, the greater depth of the heat dissipation groove 175 results in a larger heat dissipation area, and thus a better heat dissipation effect.
[0045] Furthermore, the pin soldering head 100 further includes a mounting post 190. The mounting post 190 is provided at the top end of the welding base 110 and is used to connect the soldering head on the soldering machine table. Specifically, the mounting post 190 is integrally provided at the top end of the welding base 110, and the heating block 130 can be disposed around the mounting post 190. By providing the mounting post 190, the installation and disassembly of the pin soldering head 100 can be facilitated.
[0046] In summary, this embodiment provides a pin soldering head 100. A welding avoidance groove 150 is provided at the base of the welding base 110. The welding avoidance groove 150 can avoid the plug-in pins 210 on the circuit. At the same time, a welding arc groove 170 communicated with the welding avoidance groove 150 is provided at the bottom side of the welding base 110. The arc-shaped welding surface 171 of the welding arc groove 170 engages the solder at the plug-in pins 210, and the heating block 130 is provided on the welding base 110 to heat the welding arc groove 170. At the same time, the welding arc groove 170 has an arc-shaped welding surface 171, which can be used to weld the plug-in pins 210 on the circuit board 200. During actual use, first, solder is added at the plug-in pins 210, and then the welding avoidance groove 150 is aligned with the plug-in pins 210, so that the plug-in pins 210 can pass through the welding avoidance groove 150 to reach the welding arc groove 170. Under the high-temperature contact of the arc-shaped welding surface 171, the solder is welded to form an arc-shaped welding part. Compared with the prior art, the pin soldering head 100 provided by the present utility model uses the welding avoidance groove 150 and the welding arc groove 170 to achieve limiting, avoiding large displacement of the plug-in pins 210 during the welding process, avoiding the problem of via welding offset, improving the welding precision, and effectively controlling the diffusion range of the solder by using the welding arc groove 170 to form a preset arc-shaped welding part, and avoiding excessive solder diffusion range.
[0047] Second Embodiment
[0048] This embodiment provides a welding device, including a welding machine platform and a pin soldering head 100. The basic structure, principle, technical effects of the pin soldering head 100 are the same as those of the first embodiment. For a brief description, for the parts not mentioned in this embodiment, reference can be made to the corresponding content in the first embodiment.
[0049] In this embodiment, the welding device includes a welding machine platform and a pin soldering head 100. The pin soldering head 100 includes a welding base 110 and a heating block 130. A welding avoidance groove 150 is provided on the bottom side of the welding base 110. The welding avoidance groove 150 is used to avoid the plug-in pins 210 on the circuit board 200. And a welding arc groove 170 is provided in the middle of the bottom side of the welding base 110. The welding arc groove 170 communicates with the welding avoidance groove 150. The heating block 130 is arranged on the welding base 110 and is used to heat the welding arc groove 170. The welding arc groove 170 has an arc-shaped welding surface 171. The arc-shaped welding surface 171 is used to engage the solder at the plug-in pins 210 and weld the plug-in pins 210 on the circuit board 200. A welding head is provided on the welding machine platform, and the welding head is used to fix the welding base 110.
[0050] In this embodiment, a mounting post 190 is provided at the top of the welding base 110. The mounting post 190 is fixed on the welding head, thus realizing the fixation of the welding base 110.
[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A pin welding head, characterized in that: It comprises a welding seat and a heating block, wherein a welding avoidance groove is arranged on the bottom side of the welding seat, and the welding avoidance groove is used to avoid the plug-in pins on the circuit board, and a welding arc groove is arranged in the middle of the bottom side of the welding seat, and the welding arc groove is connected with the welding avoidance groove, the heating block is arranged on the welding seat, and is used to heat the welding arc groove, and the welding arc groove has an arc-shaped welding surface, and the arc-shaped welding surface is used to join to the solder at the plug-in pin, and weld the plug-in pin to the circuit board.
2. The pin welding head according to claim 1, characterized in that: The width of the welding avoidance groove is greater than or equal to the width of the welding arc groove.
3. The pin welding head according to claim 2, characterized in that: The two ends of the welding avoidance groove respectively penetrate to two opposite side walls of the welding seat, and the welding arc groove is arranged in the middle of the welding avoidance groove.
4. The pin welding head according to claim 3, characterized in that: A heating column is also embedded in the welding seat, one end of the heating column is connected to the arc-shaped welding surface, and the other end is connected to the heating block for transferring heat in the heating block to the arc-shaped welding surface.
5. The pin welding head according to claim 4, characterized in that: The inner wall of the welding arc groove is provided with an arc-shaped heat-conducting plate, the arc-shaped heat-conducting plate is connected to the heating column, and the arc-shaped heat-conducting plate is used to form the arc-shaped welding surface.
6. The pin welding head according to claim 3, characterized in that: There are a plurality of welding avoidance grooves, and the plurality of welding avoidance grooves are arranged in parallel on the bottom side of the welding seat, and the welding arc groove is arranged in the middle of each welding avoidance groove.
7. The pin welding head according to claim 6, characterized in that: A heat dissipation groove is also arranged between two adjacent welding avoidance grooves, and the heat dissipation groove is parallel to the welding avoidance groove and is arranged at intervals.
8. The pin welding head according to claim 7, characterized in that: The depth of the heat dissipation groove is greater than the depth of the welding avoidance groove.
9. The pin welding head according to claim 1, characterized in that: The pin welding head also includes a mounting column, which is arranged on the top of the welding seat and is used to connect the welding head on the welding machine.
10. A welding device, characterized in that: It comprises a welding machine and a pin welding head as described in any one of claims 1 to 9, wherein the welding machine is provided with a welding head, and the welding head is used to fix the welding seat.