Coil tin soldering processing method

Abstract

The invention provides a coil tin soldering processing method, and relates to the field of coil manufacturing. The method comprises the following steps of feeding, terminal stamping, tin dispensing, tin soldering, cooling and detecting. After the coil is accurately positioned through the clamp seat, the terminal is tightly combined with the coil wire through the stamping mechanism; in the tin dispensing process, soldering tin liquid containing magnetic particles is dripped at the joint of the wire and the terminal; and in the soldering stage, an electromagnet embedded in the electric soldering iron acts on magnetic particles in soldering tin liquid, it is ensured that soldering tin evenly covers the connecting position, and firm welding spots are formed. And finally, through air cooling and visual inspection, the welding quality is ensured. According to the method, the welding precision and consistency are improved, and the method is suitable for coil welding application with high requirements.

Description

Technical Field

[0001] The invention relates to the technical field of soldering, and in particular to a coil soldering processing method. Background Art

[0002] In the manufacturing process of electronic components, the welding quality of the coil is crucial to the performance and stability of the final product. Especially in the connection between the coil and the terminal, the firmness, conductivity and durability of the welding are all important factors affecting the product quality. At present, the traditional coil welding method is mostly completed by manual operation or semi-automatic equipment, which has problems such as unstable welding quality, low efficiency and complex operation. In addition, the uniform distribution of solder liquid and the integrity of the welding point are also difficult to guarantee, which leads to problems such as poor contact and cracked solder joints during the use of the product.

[0003] In response to these problems, the prior art has proposed some solutions, but there are still certain limitations. For example, the patent with publication number CN111266690A discloses a tinning soldering method for junction boxes, which still has the following problems: 1. Difficulty in uniformity control: When welding a circular cross-section wire and a terminal, due to the influence of surface tension and the shape of the wire, it is difficult for the solder liquid to evenly cover the entire welding area, especially on the sides and bottom. In addition, when using an electric soldering iron to solidify the solder, the structure of the electric soldering iron is simple, and it is difficult to ensure that the solder liquid evenly covers the entire connection area and fills the tiny contact gap. 2. When the existing equipment is processing the welding of the coil and the terminal, it is difficult to ensure that the solder liquid can completely fill the tiny gap between the wire and the terminal, resulting in low welding quality. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the present invention aims to provide a coil soldering processing method, which solves the problems existing in the prior art. The method can significantly improve the welding quality, increase the production efficiency and simplify the operation process by integrating terminal stamping, solder dripping, precision welding, magnetic particle auxiliary distribution, rapid cooling and visual inspection functions into an automated soldering device. At the same time, by introducing magnetic particles into the solder liquid and combining the electromagnet design embedded in the electric soldering iron, it is ensured that the solder liquid can be evenly distributed during the welding process, solving many problems in the prior art and providing a strong guarantee for the high-quality production of electronic components.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solution: a coil soldering method, comprising the following steps:

[0008] S1 Loading: Clamp the coil to be welded on the fixture seat of the soldering device to ensure that the two wires of the coil are accurately positioned;

[0009] S2 stamping: The stamping mechanism on the soldering device accurately stamps the terminal onto the two copper wires leading out of the coil to ensure that the terminal and the wire are tightly combined, laying the foundation for subsequent welding operations;

[0010] S3 Tinning: Start the tinning mechanism on the soldering device to drip the solder liquid containing magnetic particles to the connection between the wire and the terminal;

[0011] S4 soldering: The coil is transported to the lower end of the electric soldering iron mechanism in the soldering device, gradually melting the solder liquid, and the magnetic field generated by the electromagnet embedded in the electric soldering iron acts on the magnetic particles in the solder liquid, enhancing the uniform distribution of the solder liquid at the connection and making it evenly cover the connection between the wire and the terminal;

[0012] S5 Cooling: After welding, the coil is air-cooled and the solder joints are quickly cooled;

[0013] S6 detection: The coil is transported to the visual inspection mechanism in the soldering device, which performs real-time inspection of the welding quality.

[0014] Preferably, the soldering device comprises a frame, a conveying mechanism is fixed on the upper end of the frame, and a terminal stamping mechanism, a first tinning mechanism, a second tinning mechanism, a soldering mechanism and an air outlet are arranged on the upper end of the conveying mechanism from left to right; wherein the frame is used to support and fix all parts. The conveying mechanism is used to move the coil and terminal to be welded during the welding process. The terminal stamping mechanism is responsible for stamping the terminal on the lead-out copper wire. The first tinning mechanism and the second tinning mechanism are responsible for accurately dripping an appropriate amount of solder liquid to the connection between the left and right copper wires and the terminals. The soldering mechanism is used to heat and solidify the solder liquid to complete the final welding of the copper wire and the terminal. The air outlet is used for cooling and purging after welding, helping the solder joint to cool quickly, and at the same time removing the smoke or excess flux residue generated during the welding process.

[0015] Preferably, the soldering mechanism includes a mounting frame, a slide table is slidably connected to the front of the mounting frame, an electric soldering iron is fixed to the upper end of the slide table, and a solder paste feeding assembly is movably connected to the right side of the mounting frame, wherein the mounting frame provides stable support and guidance for the slide table and the electric soldering iron. The slide table is responsible for the up and down movement of the electric soldering iron. The electric soldering iron is used to heat and solidify the solder liquid between the copper wire and the terminal. The solder paste feeding assembly is used to automatically supply solder paste during the soldering process.

[0016] Preferably, the end of the electric soldering iron is conical, and a solder groove is provided at the lower end of the electric soldering iron. The solder groove is semicircular, and a plurality of guide grooves are provided at the outer edge of the solder groove, and an electromagnet is embedded at the lower end of the electric soldering iron. The conical design is used to reduce the diffusion of heat to unnecessary surrounding areas during the heating process, reduce energy consumption, and also reduce the thermal impact on surrounding electronic components, and reduce the risk of damaging other components due to overheating. The semicircular design of the solder groove enables the solder liquid to be evenly distributed around the wire to ensure the uniformity of the solder. The plurality of guide grooves at the outer edge of the solder groove play a key role in guiding the flow of the solder liquid. During the welding process, the solder liquid will flow along the direction of the guide groove under the influence of surface tension and capillary action. For round wires, the guide groove can ensure that the solder liquid evenly covers the entire circumference of the wire, and the design of the guide groove can make the solder liquid more closely fit the surface of the wire and the terminal, fill the tiny contact gap, and improve the coverage effect of the solder and the tightness of the connection.

[0017] Preferably, the conveying mechanism includes a conveyor belt, the upper end of the conveyor belt is movably connected to a base, the upper end of the base is fixed with an adjustment table, and the upper end of the adjustment table is fixed with a fixture seat. The conveyor belt is responsible for conveying the coil assembly from the terminal stamping station to the solder dripping, welding and quality inspection stations in sequence. The base connects the conveyor belt and the adjustment table to provide stable structural support. The adjustment table is used to fine-tune the height and angle during the conveying process. The fixture seat is used to firmly clamp the coil assembly to ensure that the position does not shift during the terminal stamping and welding process of the coil.

[0018] Preferably, the upper end of the fixture seat is symmetrically provided with positioning pins, and the middle part of the positioning pins is provided with a limiting platform. The positioning pins are used to accurately locate the specific position of the copper wires led out of the coil to ensure that they are aligned with the processing equipment. The limiting platform is used to limit the movement range of the copper wires to prevent excessive displacement or shaking of the components during processing.

[0019] Preferably, the terminal stamping mechanism includes a fixed frame, a stamping cylinder is arranged at the lower end of the fixed frame, an upper punch is fixed at the lower end of the stamping cylinder, and a lower punch is fixed at the upper end of the fixed frame. The fixed frame is used to provide stable installation and positioning. The stamping cylinder drives the upper punch to move vertically by controlling the air pressure, thereby completing the terminal stamping operation. The lower punch is fixed at the upper end of the fixed frame to support and resist the stamping force of the upper punch.

[0020] Preferably, the solder paste feeding assembly comprises a slide rail, a rotating table is fixed to the upper end of the slide rail, and a solder paste fixing frame is fixed to the upper end of the rotating table.

[0021] Preferably, the first tinning mechanism comprises a fixed platform, a barrel fixing seat is arranged on the front of the fixed platform, and a feeding barrel is fixed at the front end of the barrel fixing seat. The barrel fixing seat is used to fix the barrel of the solder liquid, and the feeding barrel is used to accurately deliver the solder liquid from the syringe to the connection between the copper wire and the terminal.

[0022] Preferably, the bottom of the feeding cylinder is in a hollow cone shape, and the bottom opening diameter is 1 mm, so as to ensure that the solder liquid can drip to the designated position in an appropriate amount.

[0023] Preferably, the electromagnets are symmetrically arranged on both sides of the solder groove, and the electromagnets are used to generate magnetic field force to guide the solder liquid to flow in a specific direction.

[0024] Preferably, a visual inspection mechanism is provided at the upper right end of the frame for inspecting and evaluating the quality of the welding points after the welding process is completed.

[0025] Preferably, the solder liquid in the first tinning mechanism and the second tinning mechanism is evenly distributed with magnetic particles. The magnetic particles are used to interact with the electromagnet to guide the solder liquid to flow in a specific direction. This magnetic field-assisted solder flow method can further improve the uniformity and coverage effect of the solder, especially in a complex welding environment, and can overcome the influence of gravity and surface tension to ensure that the solder liquid accurately reaches the part that needs to be welded.

[0026] Furthermore, the lower ends of the tinning mechanism and the soldering mechanism may be provided with positioning terminal assemblies for clamping the terminals. The positioning terminal assemblies can firmly clamp the terminals, ensuring that the terminals maintain a stable position during the tinning and welding processes. This prevents the terminals from being displaced due to external interference or their own looseness, thereby ensuring that the solder liquid can accurately cover the connection area between the terminals and the wires, thereby improving the welding accuracy.

[0027] Furthermore, the core of the electromagnet is arc-shaped, and the arc shape matches the shape of the welding area, so that the magnetic field is more concentrated in a specific area, thereby improving the effect on the solder liquid.

[0028] (III) Beneficial effects

[0029] This patent provides an efficient and accurate coil soldering processing method. By combining multi-stage heating, electromagnetic guidance and visual inspection, it not only effectively improves the stability and reliability of welding, but also ensures the uniformity and strength of the solder joints. In particular, the electromagnet in the electric soldering iron mechanism interacts with the magnetic particles in the solder liquid, making the distribution of solder more even at the connection between the wire and the terminal, reducing the problem of insufficient or excessive solder. The method also combines the cooling step with real-time detection technology to further improve the controllability and consistency of welding quality. Overall, the present invention greatly improves the production efficiency and quality control level of coil welding, and is suitable for industrial applications that require high-precision welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the whole of the present invention;

[0031] Figure 2 is a schematic diagram of the conveying mechanism in the present invention;

[0032] Figure 3 It is an enlarged view of point A in the present invention;

[0033] Figure 4 is a schematic diagram of a terminal stamping mechanism in the present invention;

[0034] Figure 5 It is a schematic diagram of the first tin mechanism in the present invention;

[0035] Figure 6 is a schematic diagram of the soldering mechanism in the present invention;

[0036] Figure 7 is a schematic diagram of an electric soldering iron in the present invention;

[0037] Figure 8 It is an enlarged view of B in the present invention;

[0038] Fig. 9 It is a cross-sectional view at point B in the present invention.

[0039] In the figure: 1-frame, 2-conveyor mechanism, 3-terminal stamping mechanism, 4-first point tinning mechanism, 5-second point tinning mechanism, 6-soldering mechanism, 7-air outlet, 8-visual inspection mechanism, 21-conveyor belt, 22-base, 23-adjustment table, 24-clamp seat, 31-fixed frame, 32-stamping cylinder, 33-upper punch, 34-lower punch, 41-fixed platform, 42-barrel fixing seat, 43-feeding barrel, 61-mounting frame, 62-slide, 63-soldering iron, 64-flux paste feeding assembly, 241-positioning pin, 242-limiting table, 631-solder trough, 632-guide trough, 633-electromagnet, 641-slide rail, 642-rotating table, 643-flux paste fixing frame. DETAILED DESCRIPTION

[0040] In this application, unless otherwise clearly specified and limited, the technical terms used in this application shall be the common meanings understood by the technical personnel. The terms "connected", "connected", "fixed", "set", etc. should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be directly connected, or indirectly connected through an intermediate medium; may be mechanically connected or electrically connected. Unless otherwise clearly specified and limited, the first feature "on" or "below" the second feature may be that the first and second features are in direct contact, or indirectly contacted through an intermediate medium. Moreover, the first feature "above" or "above" or "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below" or "below" or "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Relational terms such as first, second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms used in the description, such as "center", "lateral", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "clockwise", "counterclockwise", etc., to indicate orientations or positional relationships are based on the orientations or positional relationships described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation.

[0041] The following will be combined with the attached embodiment of the present invention Figure 1 -Attached Fig. 9 The technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The present invention provides a technical solution: a coil soldering method, a coil soldering method comprising the following steps:

[0043] S1 Loading: Clamp the coil to be welded on the fixture seat of the soldering device to ensure that the two wires of the coil are accurately positioned;

[0044] S2 stamping: The stamping mechanism on the soldering device accurately stamps the terminal onto the two copper wires leading out of the coil to ensure that the terminal and the wire are tightly combined, laying the foundation for subsequent welding operations;

[0045] S3 Tinning: Start the tinning mechanism on the soldering device to drip the solder liquid containing magnetic particles to the connection between the wire and the terminal;

[0046] S4 soldering: The coil is transported to the lower end of the electric soldering iron mechanism in the soldering device, gradually melting the solder liquid, and the magnetic field generated by the electromagnet embedded in the electric soldering iron acts on the magnetic particles in the solder liquid, enhancing the uniform distribution of the solder liquid at the connection and making it evenly cover the connection between the wire and the terminal;

[0047] S5 Cooling: After welding, the coil is air-cooled and the solder joints are quickly cooled;

[0048] S6 detection: The coil is transported to the visual inspection mechanism in the soldering device, which performs real-time inspection of the welding quality.

[0049] The soldering device comprises a frame 1, a conveying mechanism 2 is fixed on the upper end of the frame 1, and a terminal stamping mechanism 3, a first tinning mechanism 4, a second tinning mechanism 5, a soldering mechanism 6 and an air outlet 7 are arranged on the upper end of the conveying mechanism 2 from left to right; wherein the frame 1 is the basic structure of the entire module soldering machine, which is used to support and fix all parts. It provides a stable working platform for the equipment to ensure that each mechanism can operate accurately and stably. The conveying mechanism 2 is used to move the coil and terminal to be welded during the welding process. It accurately transfers the coil from one station to the next station to ensure the continuity and efficiency of the entire welding process. The terminal stamping mechanism 3 is responsible for stamping the terminal on the lead-out copper wire to achieve the preliminary connection between the copper wire and the terminal. This is the first step of the entire welding process to ensure that the subsequent welding process can proceed smoothly. The first tinning mechanism 4 is responsible for accurately dripping an appropriate amount of solder liquid to the connection between the left copper wire and the terminal. The second tinning mechanism 5 is responsible for accurately dripping an appropriate amount of solder liquid to the connection between the right copper wire and the terminal. The tinning mechanism is located above the conveying mechanism, which can ensure that the solder liquid evenly covers the upper and side parts of the connection area. The soldering mechanism 6 is used to heat and solidify the solder liquid to complete the final welding of the copper wire and the terminal. The mechanism can melt the solder liquid by heating the electric soldering iron, and make it flow and solidify evenly at the connection point to ensure a firm solder joint. The air outlet 7 is used for cooling and purging after welding, helping the solder joint to cool quickly, while removing the smoke or excess solder paste residue generated during the welding process. It ensures that the solder joint maintains its shape and quality during the curing process. Proper cooling can prevent the solder liquid from shrinking or cracking during the curing process, ensuring the mechanical strength and conductive properties of the solder joint. At the same time, the cleaning station helps to keep the working environment clean and tidy and extend the service life of the equipment. The visual inspection mechanism 8 is used to inspect and evaluate the quality of the solder joint after the welding process is completed. The welding area is scanned and analyzed by a high-definition camera to identify the uniformity, integrity and quality problems of the solder joint, such as defects such as cold soldering, cold soldering, insufficient or excessive solder. The introduction of the visual inspection mechanism can realize automated quality control, reduce errors in manual inspection, and improve production efficiency. At the same time, through timely detection and feedback, problems in the process can be identified and corrected at an early stage, ensuring that each solder joint meets quality standards and improving the overall reliability of the product.

[0050] The conveying mechanism 2 includes a conveyor belt 21, the upper end of which is movably connected to a base 22, the upper end of which is fixed with an adjustment platform 23, and the upper end of which is fixed with a fixture seat 24. A positioning pin 241 is symmetrically arranged at the upper end of the fixture seat 24, and a limiting platform 242 is arranged in the middle of the positioning pin 241. The conveyor belt 21 is responsible for conveying the coil assembly from the terminal stamping station to the solder dripping, welding and quality inspection stations in sequence. Through continuous conveying action, the automation of the production process is realized. The base 22 serves as a bearing platform, connecting the conveyor belt and the adjustment platform, providing stable structural support, and ensuring stability during the conveying process. The adjustment platform 23 is used to fine-tune the height and angle during the conveying process to ensure that the coil assembly maintains the best docking state with the working surface of each station. The fixture seat 24 is fixed on the adjustment platform to firmly clamp the coil assembly to ensure that the position does not shift during the terminal stamping and welding process of the coil. The positioning pins 241 are installed on both sides of the fixture seat to accurately locate the specific position of the copper wire led out of the coil to ensure its alignment with the processing equipment. The limit table 242 is set in the middle of the positioning pin to limit the movement range of the copper wire to prevent excessive displacement or shaking of the component during processing.

[0051] The terminal stamping mechanism 3 includes a fixed frame 31, a stamping cylinder 32 is provided at the lower end of the fixed frame 31, an upper punch 33 is fixed at the lower end of the stamping cylinder 32, and a lower punch 34 is fixed at the upper end of the fixed frame 31. The fixed frame 31 serves as the main supporting structure of the terminal stamping mechanism, providing stable installation and positioning to ensure accuracy during the stamping process. The stamping cylinder 32 drives the upper punch to move vertically by controlling the air pressure, thereby completing the terminal stamping operation. The upper punch 33 is connected to the stamping cylinder and is the tool that actually completes the terminal crimping operation. The upper punch is driven by the cylinder to press the terminal into the copper wire. The lower punch 34 is fixed at the upper end of the fixed frame to support and resist the punching force of the upper punch. It ensures that the wire remains in a stable position during the stamping process and will not be deformed or displaced due to the punching force.

[0052] The first tinning mechanism 4 includes a fixed platform 41, a barrel fixing seat 42 is provided on the front of the fixed platform 41, and a feed barrel 43 is fixed at the front end of the barrel fixing seat 42. The bottom of the feed barrel 43 is a hollow cone, and the bottom opening diameter is 1mm. The fixed platform 41 is the main supporting structure of the first tinning mechanism, ensuring that the syringe fixing seat and the feed barrel remain stable during operation. The barrel fixing seat 42 is used to fix the barrel of the solder liquid to ensure that the barrel maintains the correct angle and position during the tinning process. The feed barrel 43 is used to accurately transport the solder liquid from the syringe to the connection between the copper wire and the terminal. The bottom of the feed barrel is a hollow conical design, and the bottom opening diameter is 1mm, ensuring that the solder liquid can drip to the specified position in an appropriate amount. The conical design and the opening diameter of 1mm enable the solder liquid to drip in a concentrated and accurate manner to cover the connection area. This design helps to control the amount of solder and avoid the risk of short circuit caused by excessive solder and the problem of loose connection caused by too little solder.

[0053] The soldering mechanism 6 includes a mounting frame 61, a slide 62 is slidably connected to the front of the mounting frame 61, an electric soldering iron 63 is fixed to the upper end of the slide 62, and a solder paste feeding assembly 64 is movably connected to the right side of the mounting frame 61; the mounting frame 61 is the main supporting structure of the soldering mechanism 6, providing stable support and guidance for the slide and the electric soldering iron. The slide 62 is slidably connected to the mounting frame and bears the up and down movement of the electric soldering iron. Through precise sliding guidance, the slide ensures that the electric soldering iron can stably contact the welding area. The electric soldering iron 63 is the core component of the soldering mechanism, which is used to heat and solidify the solder liquid between the copper wire and the terminal. The design of the electric soldering iron can include multiple heating sections and guide grooves to ensure that the solder liquid can evenly cover the connection area. The solder paste feeding assembly 64 is used to automatically supply solder paste during the welding process. The solder paste helps to remove oxides and improve the wettability and welding quality of the solder.

[0054] The solder paste feeding assembly 64 includes a slide rail 641, a rotating table 642 is fixed to the upper end of the slide rail 641, and a solder paste fixing frame 643 is fixed to the upper end of the rotating table 642. The slide rail 641 serves as a guide structure of the solder paste feeding assembly to ensure that the supply path of the solder paste is stable and controllable. The slide rail can guide the rotating table to move accurately on the welding area and accurately deliver the solder paste to the welding point position. The rotating table 642 is connected to the slide rail and can move under the guidance of the slide rail. At the same time, the rotating table can be rotated and adjusted according to the welding requirements to ensure the quantitative and fixed-point supply of the solder paste. The solder paste fixing frame 643 is a supporting structure of the solder paste container, which fixes the solder paste and keeps it in a stable state to ensure that the solder paste can flow smoothly from the feeding assembly.

[0055] The end of the electric soldering iron 63 is conical, and a soldering tin groove 631 is arranged at the lower end of the electric soldering iron 63. The soldering tin groove 631 is semicircular, and a plurality of guide grooves 632 are arranged at the outer edge of the soldering tin groove 631. The end of the electric soldering iron 63 is designed to be conical. Since the surface area of ​​the conical end is relatively small, the diffusion of heat to the surrounding unnecessary areas can be reduced during the heating process, thereby reducing energy consumption, and also reducing the thermal impact on the surrounding electronic components, and reducing the risk of damaging other components due to overheating. The semicircular design of the soldering tin groove 631 enables the solder liquid to be evenly distributed around the wire, especially for round wires, the connection can be covered from all directions at the same time to ensure the uniformity of the solder. Regardless of how the angle of the wire changes, the soldering tin groove 631 can ensure that the soldering tin liquid is evenly filled into the connection area under the action of gravity and surface tension, thereby improving the reliability of welding. The plurality of guide grooves 632 at the outer edge of the soldering tin groove 631 play a key role in guiding the flow of the soldering tin liquid. During the soldering process, the solder liquid will flow along the direction of the guide groove under the influence of surface tension and capillary action. For round wires, the guide groove can ensure that the solder liquid evenly covers the entire circumference of the wire, especially the hard-to-reach areas such as the bottom and sides, to avoid uneven soldering. The design of the guide groove 632 can make the solder liquid fit the surface of the wire and the terminal more closely, fill the tiny contact gap, and improve the coverage effect of the solder and the tightness of the connection. By precisely controlling the angle and depth of the guide groove 632, the flow speed and direction of the solder liquid can be adjusted to ensure that the solder liquid is covered in the best state, thereby improving the welding quality.

[0056] The lower end of the electric soldering iron 63 is embedded with an electromagnet 633. The electromagnets 633 are symmetrically arranged on both sides of the soldering groove 631. The solder liquid in the first tinning mechanism 2 and the second tinning mechanism 3 is evenly distributed with magnetic particles. Functions of the embedded electromagnet:

[0057] Magnetic field assisted solder flow: The electromagnet 633 embedded in the lower end of the electric soldering iron 63 interacts with the magnetic particles in the solder liquid to generate a magnetic field force, which guides the solder liquid to flow in a specific direction. This magnetic field assisted solder flow method can further improve the uniformity and coverage effect of the solder, especially in a complex welding environment, and can overcome the influence of gravity and surface tension to ensure that the solder liquid accurately reaches the part that needs to be welded. The magnetic field generated by the electromagnet can constrain and control the magnetic particles in the solder liquid, reduce the splashing and fluctuation of the solder liquid during the welding process, and improve the stability of welding. At the same time, the magnetic field force can also make the solder liquid fit the surface of the wire and the terminal more closely, and enhance the firmness of the connection. By adjusting the current size and direction of the electromagnet, the strength and direction of the magnetic field can be changed to adapt to different welding tasks and material requirements. For example, for wires of different diameters and different types of terminals, the magnetic field parameters can be adjusted to achieve the best solder flow effect and welding quality.

[0058] Placing the electromagnets symmetrically on both sides of the solder tank ensures that the magnetic field is evenly distributed around the solder tank. This allows the solder liquid to be subjected to the same magnetic field force in all directions, so that it flows and covers the connection between the wire and the terminal more evenly. This avoids the problem of uneven distribution of solder liquid due to uneven magnetic field, and improves the consistency and reliability of welding.

[0059] Working principle:

[0060] Coil loading: The coil enters the module soldering machine system through the automatic conveying mechanism 2. The base 22 and the adjustment table 23 on the conveyor belt 21 ensure the stable movement and positioning of the coil in the system. The loading of the coil is the starting point of the entire welding process, ensuring that the coil can accurately reach each processing position in the subsequent processing steps.

[0061] Terminal stamping: The coil is conveyed to the terminal stamping mechanism 3, where the stamping cylinder 32 stamps the end of the copper wire leading out of the coil through the upper punch 33 to fix the terminal on the copper wire. The lower punch 34 fixes the copper wire to ensure the accuracy of the stamping. The stamping process accurately hits the terminal to the end of the copper wire, preparing for the subsequent welding step.

[0062] Tinning: After stamping, the coil is transported to the first tinning mechanism 4 and the second tinning mechanism 5. In these two tinning mechanisms, the solder liquid drips from the conical nozzle with a bottom opening diameter of 1mm through the feeding cylinder 43 to the connection between the copper wire and the terminal on the left and right sides. The solder liquid contains magnetic particles to ensure uniform distribution of the solder. The step of pre-coating the solder liquid provides preliminary solder coverage for the welding point, helps fill the tiny gap and improves the welding quality.

[0063] Soldering with soldering iron: The coil that has been tinned is further transported to the soldering mechanism 6. The electric soldering iron 63 is equipped with a tapered end and a semicircular solder groove 631. A plurality of guide grooves 632 arranged at the lower end guide the solder liquid to evenly cover the connection between the copper wire and the terminal. The electromagnets 633 embedded in the electric soldering iron 63 are symmetrically arranged on both sides of the solder groove, which can attract magnetic particles in the solder liquid to accurately control the flow of solder. The soldering iron heats and solidifies the solder liquid, ensuring that the solder evenly fills the connection and forms a stable solder joint.

[0064] Blowing cooling: The soldered coil is transported to the blowing port 7 for cooling and solidifying the solder joint. The blowing port quickly cools the solder joint through strong air, ensuring that the solder maintains good structure and performance during the cooling process. The cooling process ensures the strength and stability of the solder joint and prevents unevenness or defects in the solder during the solidification process.

[0065] Visual inspection: Finally, the coil is transported to the visual inspection mechanism 8, which detects the quality of the welds through a high-resolution camera and image processing system. Visual inspection is used to confirm the accuracy of the welding process and the quality of the welds, ensuring that each weld meets the specified standards and requirements.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coil soldering method, characterized in that: The following steps are involved: S1 Loading: Clamp the coil to be welded on the fixture seat of the soldering device to ensure that the two wires of the coil are accurately positioned; S2 stamping: The stamping mechanism on the soldering device accurately stamps the terminal onto the two copper wires leading out of the coil to ensure that the terminal and the wire are tightly combined, laying the foundation for subsequent welding operations; S3 Tinning: Start the tinning mechanism on the soldering device to drip the solder liquid containing magnetic particles to the connection between the wire and the terminal; S4 soldering: The coil is transported to the lower end of the electric soldering iron mechanism in the soldering device, gradually melting the solder liquid, and the magnetic field generated by the electromagnet embedded in the electric soldering iron acts on the magnetic particles in the solder liquid, enhancing the uniform distribution of the solder liquid at the connection and making it evenly cover the connection between the wire and the terminal; S5 Cooling: After welding, the coil is air-cooled and the solder joints are quickly cooled; S6 detection: The coil is transported to the visual inspection mechanism in the soldering device, which performs real-time inspection of the welding quality.

2. A coil soldering method according to claim 1, characterized in that: The soldering device comprises a frame (1), a conveying mechanism (2) is fixed at the upper end of the frame (1), and a terminal stamping mechanism (3), a first tinning mechanism (4), a second tinning mechanism (5), a soldering mechanism (6) and an air outlet (7) are arranged at the upper end of the conveying mechanism (2) from left to right; The soldering mechanism (6) comprises a mounting frame (61), the front side of the mounting frame (61) is slidably connected to a slide table (62), the upper end of the slide table (62) is fixed with an electric soldering iron (63), and the right side of the mounting frame (61) is movably connected to a solder paste feeding assembly (64); The end of the electric soldering iron (63) is conical, the lower end of the electric soldering iron (63) is provided with a solder groove (631), the solder groove (631) is semicircular, the outer edge of the solder groove (631) is provided with a plurality of guide grooves (632), and the lower end of the electric soldering iron (63) is embedded with an electromagnet (633).

3. A coil soldering method according to claim 1, characterized in that: The conveying mechanism (2) comprises a conveying belt (21), the upper end of the conveying belt (21) is movably connected to a base (22), the upper end of the base (22) is fixed with an adjustment platform (23), and the upper end of the adjustment platform (23) is fixed with a fixture seat (24).

4. A coil soldering method according to claim 1, characterized in that: The upper end of the clamp seat (24) is symmetrically provided with positioning pins (241), and the middle part of the positioning pins (241) is provided with a limiting platform (242).

5. A coil soldering method according to claim 1, characterized in that: The terminal stamping mechanism (3) comprises a fixed frame (31), a stamping cylinder (32) is arranged at the lower end of the fixed frame (31), an upper punch (33) is fixed at the lower end of the stamping cylinder (32), and a lower punch (34) is fixed at the upper end of the fixed frame (31).

6. A coil soldering method according to claim 1, characterized in that: The solder paste feeding assembly (64) comprises a slide rail (641), a rotating platform (642) is fixed to the upper end of the slide rail (641), and a solder paste fixing frame (643) is fixed to the upper end of the rotating platform (642).

7. A coil soldering method according to claim 1, characterized in that: The first tinning mechanism (4) comprises a fixed platform (41), a barrel fixing seat (42) is arranged on the front of the fixed platform (41), and a feeding barrel (43) is fixed on the front end of the barrel fixing seat (42).

8. A coil soldering method according to claim 1, characterized in that: The bottom of the feeding cylinder (43) is in a hollow conical shape, and the diameter of the bottom opening is 1 mm.

9. A coil soldering method according to claim 1, characterized in that: The electromagnets (633) are symmetrically arranged on both sides of the solder groove (631).

10. A coil soldering method according to claim 1, characterized in that: A visual detection mechanism (8) is provided at the upper right end of the frame (1).

Images