Wire tinning device and method

Abstract

The invention relates to the technical field of wire rod processing, in particular to a wire rod tin plating device and method.The wire rod tin plating device comprises a wire inlet assembly, an air inflation assembly, a wire guide pipeline, a tin plating assembly, a tin immersion assembly and a wire cooling assembly, the wire inlet assembly comprises a rack and an atmosphere protection box, the atmosphere protection box is obliquely arranged above the rack, and the air inflation assembly is arranged in the rack; the inflation valve is used for inflating the wire pipeline; the tin plating assembly is provided with a tin furnace, one end of the wire pipeline is connected with the atmosphere protection box, the other end of the wire pipeline extends into the tin furnace, the tin immersion assembly is provided with a tin immersion wire support, and one end of the tin immersion wire support is immersed into the tin furnace, is opposite to the outlet end of the wire pipeline and is used for guiding wires towards the cooling wire assembly. The cooling wire assembly is used for leading out the wire. The electrical performance of a finished product and the adaptability of a subsequent processing process are improved; tin consumption and pollution emission are reduced through overall sealing and gas control, the productivity and the product percent of pass are improved, and the device is suitable for high-speed continuous production.

Description

Technical Field

[0001] This invention relates to the field of wire processing technology, and in particular to a wire tin plating apparatus and method. Background Technology

[0002] Metal wires are widely used in electronics, cables, and precision devices. Their surface brazing, welding, and corrosion protection processes often rely on a uniform and dense tin plating layer. In wire tin plating, to avoid oxidation and surface contamination at high temperatures, the wire is typically protected with an inert or reducing gas before entering the tin bath to create an oxygen-free or low-oxygen local atmosphere, improving the wettability and adhesion of liquid tin. However, existing equipment is prone to leakage problems at the gas seal and wire transition points: aging of the wire inlet / outlet pipe seals, poor sealing at joints, assembly gaps, thermal expansion, or vibration-induced displacement can all cause protective gas escape or air backflow. Decreased airtightness leads to partial oxidation or contamination of the wire surface before tinning, resulting in defects such as poor wetting, uneven plating, pinholes, and peeling. This increases the rejection rate, wastes molten tin and protective gas, and increases subsequent cleaning and rework costs. Therefore, achieving reliable and adjustable sealing and stable mechanical positioning at the wire inlet / outlet interface to ensure the integrity of the atmosphere before tin plating is a key technical issue for improving plating quality and production efficiency. Summary of the Invention

[0003] To address the aforementioned issues, this invention improves the electrical properties of the finished product and its adaptability to subsequent processing steps; overall sealing and gas control reduce tin consumption and pollution emissions, increasing production capacity and product qualification rate, making it suitable for high-speed continuous production wire tin plating equipment and method.

[0004] The technical solution adopted in this invention is: a wire tinning device, comprising a wire inlet assembly, an air filling assembly, a wire conduit, a tinning assembly, a tin immersion assembly, and a cooling wire assembly. The wire inlet assembly includes a frame and an atmosphere protection box, the atmosphere protection box being inclinedly arranged above the frame. The air filling assembly is arranged inside the frame and is used to fill the wire conduit with air. The tinning assembly is provided with a tin furnace, one end of the wire conduit being connected to the atmosphere protection box and the other end extending into the tin furnace. The tin immersion assembly is provided with a tin-immersion wire support, one end of which is immersed in the tin furnace and opposite to the outlet end of the wire conduit, used to guide the wire toward the cooling wire assembly. The cooling wire assembly is used to guide the wire out.

[0005] A further improvement to the above scheme is that the inflation component is provided with an inflation pipe, the inflation pipe is connected to a flexible pipe, one end of the flexible pipe is connected to a wire pipe and used to supply air to the wire pipe; the flexible pipe is provided with a tee connector, the tee connector is located at the middle end of the wire pipe to fix the wire pipe.

[0006] A further improvement to the above solution is that a fixed bracket is provided on one side of the tin furnace, the fixed bracket being used to fix the wire conduit; the fixed bracket includes a fixed end plate, an adjusting connecting rod, and an adjusting fixed plate; two fixed end plates are provided, respectively located on both sides of the tin furnace, and an adjusting groove is provided on the fixed end plate, the adjusting connecting rod is located on the adjusting groove and connected to the adjusting fixed plate, the adjusting fixed plate is used to fix the wire conduit, and the adjusting connecting rod rotates to adjust the angle of the adjusting fixed plate.

[0007] A further improvement to the above solution is that the wire conduit includes an inlet conduit, a connecting conduit, and a sealing element; the sealing element is used to seal the inlet conduit and the connecting conduit, one end of the connecting conduit extends into the solder pot, a locking element is provided on the side of the connecting conduit near the sealing element, one end of the inlet conduit is inserted into the wire conduit, and the locking element is used to lock and fix the inlet conduit.

[0008] A further improvement to the above solution is that the sealing element includes a sealing sleeve and a sealing locking ring. The sealing sleeve covers the space between the connecting pipe and the inlet pipe. Two sealing locking rings are provided, which are respectively located on both sides of the sealing sleeve and fix the sealing sleeve to the wire pipe and the inlet pipe respectively.

[0009] A further improvement to the above solution is that the tin-immersion assembly includes a fixing element and a crossbeam, and multiple tin-immersion wire supports are arranged in a linear array on the crossbeam and located above the tin furnace; the fixing element includes a fixing base and a fixing rod, the fixing base is provided with a groove, the fixing rod is disposed on the groove, the groove extends along the length direction of the tin furnace, and the fixing rod adjusts the position of the crossbeam along the length direction of the groove.

[0010] A further improvement to the above solution is that the tin-immersed wire support includes a tin-immersed guide rod, a tin-immersed fixing block, and a tin-immersed guide wheel. The tin-immersed guide rod is movably mounted on a crossbeam, and screws are provided on the crossbeam to fix the tin-immersed guide rod. The tin-immersed fixing block is located at one end of the tin-immersed guide rod, and the tin-immersed guide wheel is located on the tin-immersed fixing block for guiding the wire toward the cooling wire assembly. A wire groove is provided on the tin-immersed fixing block, and the wire groove is opposite to the tin-immersed guide wheel.

[0011] A further improvement to the above solution is that the cooling wire assembly includes a transmission fixing frame, a transmission drive module, and an output wire module. The transmission drive module is mounted on the transmission fixing frame, and the cooling wire assembly is mounted on the transmission drive module. The transmission drive module is used to drive the output wire module to move relative to the tin furnace.

[0012] A further improvement to the above solution is that the transmission drive module includes a transmission frame, a drive motor, a transmission chain assembly, and a transmission guide rail. The transmission frame is mounted on a transmission fixing frame, and the drive motor is mounted on the transmission frame and drivenly connected to the transmission chain assembly. The drive motor is used to drive the transmission chain assembly to drive the output wire module to slide along the transmission guide rail. The output wire module includes a wire transmission seat and an output wire wheel mounted on the wire transmission seat. The wire transmission seat is mounted on the transmission guide rail and connected to the transmission chain assembly.

[0013] A tin plating method based on a wire tin plating apparatus includes the following steps: S1: Pretreatment and Atmosphere Setup The wire to be tinned is introduced through the atmosphere protection box of the wire inlet assembly; the gas filling assembly is activated to continuously introduce inert protective gas into the wire conduit while maintaining a positive pressure inside the atmosphere protection box to expel the air in the conduit and create an oxygen-free tinning environment for the wire. S2: Preheating and Guiding: The wire travels inside a conductor tube filled with protective gas, and is preheated by the radiant heat of the tin furnace, gradually bringing its temperature close to that of molten tin. S3: Tin dipping and plating: After the preheated wire is led out from the outlet end of the wire conduit, it is immediately guided by the immersion guide roller of the immersion assembly and immersed into the molten tin in the tin furnace at the set immersion angle and tension to complete the surface plating. S4: Cooling and Forming After tinning, the wire is drawn out of the molten tin and received by the cooling wire assembly. By controlling its traction speed and ambient temperature, the tin layer on the wire surface is cooled and solidified evenly, forming a smooth and continuous plating layer. S5: Post-processing and cable retraction: After being fully cooled, the tin-plated wire is guided by the output guide wheel and pulled to the take-up device for winding; the entire process is monitored and recorded by the control unit. The process of introducing inert protective gas into S1 includes: First, purge the pipeline: inject inert gas into the pipeline at a high flow rate to quickly remove air; Then, maintain the atmosphere: switch to low flow maintenance mode and make the air pressure inside the atmosphere protection box slightly higher than the outside atmospheric pressure to form a slightly positive pressure environment, effectively preventing air backflow; The tin-dipping process in S3 achieves fine control by adjusting the tin-dipping components: By adjusting the position of the fixing rod in the groove of the fixing base, the overall height of the crossbeam can be changed, thereby controlling the immersion depth of the wire in the molten solder. By individually adjusting the extension length of each tin-dipping guide rod on the crossbeam and the fixing screw, the lateral position of each guide wheel can be finely adjusted to ensure that the immersion paths of multiple wires are parallel and consistent. It also includes tension control throughout the entire process: At the wire inlet, the tensioner at the inlet of the atmosphere protection box provides the initial wire tension F1; In the tin plating section, the process tension F2 is formed by the guidance of the tin-immersion guide rollers and the viscosity of the molten tin itself; At the outgoing end, active traction tension F3 is provided by the transmission drive module of the cooling wire assembly; The control unit dynamically monitors and coordinates F1, F2, and F3 to ensure that the wire remains under constant optimal tension throughout the entire process.

[0014] The beneficial effects of this invention are: Compared to existing wire tinning methods, this invention utilizes an atmosphere protection chamber and positive pressure gas filling of the wire conduit to create a stable inert or protective atmosphere. This significantly suppresses wire oxidation before and after entering the tin bath, reducing oxide scale and splashing impurities, thereby improving coating density and appearance quality. The wire conduit extends into the tin bath and is positioned corresponding to the tinning support, ensuring consistent immersion depth and path of the wire in the tin bath, improving tin layer thickness uniformity, and reducing the risk of tin breakage and incomplete plating. The tilted atmosphere protection chamber facilitates wire entry, promoting production continuity and equipment maintenance. Cooling the wire assembly rapidly solidifies the coating, locking in surface morphology, reducing oxidation and reflow, and improving the finished product's electrical performance and adaptability to subsequent processing. Overall sealing and gas control reduce tin consumption and pollution emissions, increasing production capacity and product yield, making it suitable for high-speed continuous production. Overall, this solution improves tinning quality, stability, and economy.

[0015] The tin plating method achieves high-quality, stable, and high-capacity tin plating through a synergistic process of atmosphere control, preheating, precise immersion, tension closed-loop, and cooling forming. On one hand, the dual-mode atmosphere establishment and purging-maintenance effectively removes air from the pipeline and maintains a slight positive pressure, significantly suppressing oxidation and splashing of the wire before and after entering the furnace, reducing oxide scale and surface defects, and minimizing rework and scrap. Preheating the wire within the conduit gradually brings its temperature close to the molten tin temperature, improving wettability and molten tin flow, reducing thermal shock and poor molten tin adhesion, and facilitating the formation of a dense and uniform plating layer. Precise control of immersion depth and lateral position is achieved through fine-tuning of the beam height and guide rollers, enabling consistent wetting paths and tin layer thickness for multiple parallel wires, and allowing adjustment of plating thickness and uniformity as needed. Three-stage tension (… Dynamic monitoring and coordination of F1, F2, and F3 components create a constant tension field, preventing wire sagging, vibration, or breakage, ensuring tinning stability and plating continuity, and improving yield. Coordinated control of the cooling wire assembly and traction speed ensures rapid and uniform tin solidification, resulting in a smooth, drip-free plating with good adhesion, improving electrical performance and adaptability to subsequent processing. Switching gas flow from high to low quickly replaces air while conserving protective gas, reducing operating costs and environmental emissions. Monitoring and recording by the entire control unit enables process traceability, parameter optimization, and automated production, enhancing production stability and capacity. Overall, this method significantly improves tinning quality, stability, and economy, making it suitable for continuous and precision production needs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the wire tin plating apparatus of the present invention; Figure 2 for Figure 1 A three-dimensional schematic diagram of the wire tin plating device from another perspective; Figure 3 for Figure 2 Enlarged diagram of point A in the diagram; Figure 4 for Figure 1 A partial structural schematic diagram of the tin plating device for medium-sized wires; Figure 5 for Figure 1 A partial structural schematic diagram of the tin plating device for medium-sized wires; Figure 6 This is a schematic flowchart of the tin plating method based on the wire tin plating apparatus of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 1. Cable entry assembly; 11. Frame; 12. Atmosphere protection box; 2. Gas filling assembly; 21. Gas filling pipe; 22. Flexible pipe; 23. T-joint; 3. Wire conduit; 31. Cable entry pipe; 32. Connecting pipe; 32. Locking element; 321. Sealing element; 33. Sealing sleeve; 331. Sealing locking ring; 332. Tin plating assembly; 4. Tin furnace; 41. Tin immersion assembly; 5. Fixing element; 51. Fixing base; 511. Fixing connecting rod; 512. Pull groove; 513. Crossbeam; 52. Cooling wire assembly 6, transmission fixing frame 61, transmission drive module 62, transmission frame 621, drive motor 622, transmission chain assembly 623, transmission guide rail 624, output wire module 63, wire transmission seat 631, output wire wheel 632, tin-immersed wire bracket 7, tin-immersed guide rod 71, tin-immersed fixing block 72, wire groove 721, tin-immersed guide wheel 73, fixing bracket 8, fixing end plate 81, adjusting pull groove 811, adjusting connecting rod 82, adjusting fixing plate 83. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Figures 1-5As shown, in one embodiment of the present invention, a wire tinning apparatus is disclosed, comprising a wire inlet assembly 1, an air filling assembly 2, a wire conduit 3, a tinning assembly 4, a tin immersion assembly 5, and a cooling wire assembly 6. The wire inlet assembly 1 includes a frame 11 and an atmosphere protection box 12, the atmosphere protection box 12 being inclinedly disposed above the frame 11. The air filling assembly 2 is disposed within the frame 11 and is used to fill the wire conduit 3 with air. The tinning assembly 4 is provided with a tin furnace 41, one end of the wire conduit 3 being connected to the atmosphere protection box 12 and the other end extending into the tin furnace 41. The tin immersion assembly 5 is provided with a tin-immersion wire support 7, one end of which is immersed in the tin furnace 41 and opposite to the outlet end of the wire conduit 3, for guiding the wire toward the cooling wire assembly 6, the cooling wire assembly 6 being used to guide the wire out. This embodiment utilizes an atmosphere protection box and positive pressure gas filling of the wire conduit 3 to create a stable inert or protective atmosphere, significantly suppressing the oxidation of the wire before and after entering the tin bath 41, reducing oxide scale and splashing impurities, thereby improving the density and appearance quality of the plating layer. The wire conduit 3 extends into the tin bath 41 and corresponds to the positioning of the tin dipping bracket, ensuring a stable and consistent immersion depth and path for the wire in the tin bath, improving the uniformity of the tin layer thickness, and reducing the risk of tin breakage and incomplete plating. The inclined atmosphere protection box 12 facilitates wire entry, promotes production continuity, and enhances equipment maintenance. Cooling the wire assembly 6 rapidly solidifies the plating layer, locking in the surface morphology, reducing oxidation and reflow, and improving the electrical performance of the finished product and its adaptability to subsequent processing. Overall sealing and gas control reduce tin consumption and pollution emissions, increase production capacity and product qualification rate, and are suitable for high-speed continuous production. Overall, this solution improves the quality, stability, and economy of tin plating.

[0021] The inflation assembly 2 is equipped with an inflation pipe 21, which is connected to a flexible pipe 22. One end of the flexible pipe 22 is connected to the guide pipe 3 and is used to supply gas to the guide pipe 3. The flexible pipe 22 is equipped with a tee connector 23, which is located at the middle end of the guide pipe 3 to fix the guide pipe 3. In this embodiment, the flexible pipe 22 can absorb the thermal expansion of the equipment, mechanical vibration and assembly errors, reduce the stress transmission of the rigid connection to the guide pipe 3 and the inlet pipe, reduce pipeline fatigue and leakage risks, thereby improving airtightness and long-term reliability. The flexible connection facilitates rapid pipeline layout and maintenance disassembly and assembly, shortens maintenance time and improves production line availability. The tee connector 23 located at the middle end of the guide pipe 3 serves as both a gas distribution node and a fixation point for the inlet pipe, achieving more stable pipe position constraint, preventing the inlet pipe from sagging or shifting, ensuring a sealed fit between the atmosphere protection box 12 and the guide pipe 3, and maintaining a stable positive pressure protective atmosphere inside the pipe. A well-arranged three-way valve can optimize the injection point and flow field distribution of inert gas, improve purging efficiency and gas utilization, reduce dead zones and gas loss, thereby reducing operating costs and enhancing the uniformity of the oxygen-free environment.

[0022] A fixed bracket 8 is provided on one side of the solder pot 41 to fix the wire conduit 3. The fixed bracket 8 includes a fixed end plate 81, an adjusting rod 82, and an adjusting fixing plate 83. Two fixed end plates 81 are provided and are respectively provided on both sides of the solder pot 41. The fixed end plate 81 is provided with an adjusting groove 811. The adjusting rod 82 is provided on the adjusting groove 811 and connected to the adjusting fixing plate 83. The adjusting fixing plate 83 is used to fix the wire conduit 3. The adjusting rod 82 rotates to adjust the angle of the adjusting fixing plate 83. In this embodiment, the two fixed end plates 81 provided on both sides of the solder pot 41 provide bidirectional support for the wire conduit 3, making the fixing of the wire conduit 3 at the solder inlet more rigid and stable, reducing the deflection and sagging of the conduit, and reducing the displacement caused by wire traction or vibration. This ensures the long-term stability of the relative position between the wire conduit 3 and the opening of the solder pot 41, which is beneficial for sealing and reducing gas leakage. The adjusting groove 811, in conjunction with the rotatable adjusting rod 82, adjusts the angle of the fixing plate 83, allowing for precise adjustment of the installation position and furnace entry angle of the wire conduit 3. This enables rapid optimization of the furnace entry depth and induction angle during equipment debugging or switching between different wire diameters and plating processes, thereby controlling the immersion path, tin layer thickness distribution, and sagging, improving plating consistency and product yield. The adjusting structure compensates for deviations caused by thermal expansion or on-site installation tolerances, facilitating on-site fine-tuning and repeated positioning, reducing debugging cycles, and improving production stability.

[0023] The wire conduit 3 includes an inlet conduit 31, a connecting conduit 32, and a sealing element 33. The sealing element 33 is used to seal the inlet conduit 31 and the connecting conduit 32. One end of the connecting conduit 32 extends into the solder pot 41. A locking element 321 is provided on the side of the connecting conduit 32 near the sealing element 33. One end of the inlet conduit 31 is inserted into the wire conduit 3, and the locking element 321 is used to lock and fix the inlet conduit 31. Specifically, the sealing element 33 includes a sealing sleeve 331 and a sealing locking ring 332. The sealing sleeve 331 covers the space between the connecting conduit 32 and the inlet conduit 31. Two sealing locking rings 332 are provided, respectively located on both sides of the sealing sleeve 331, and respectively fix the sealing sleeve 331 to the wire conduit 3 and the inlet conduit 31. In this embodiment, the sealing sleeve 331 serves as an elastic sealing layer, forming a reliable airtight interface between the inlet pipe 31 and the connecting pipe 32. This effectively prevents air backflow and inert gas leakage, ensuring a long-term slightly positive pressure, oxygen-free tin-plating environment within the conductor pipe 3, reducing wire oxidation, and improving wettability and plating consistency. The sealing locking rings 332 on both sides clamp and fix the sealing sleeve 331, providing mechanical redundancy and enhancing vibration and tensile strength. This prevents loosening or displacement caused by wire traction or thermal expansion, thereby improving seal life and reliability. The locking element 321, located near the seal, axially fixes the insert-type inlet pipe 31, ensuring pipe stability, simplifying installation and commissioning, and reducing stress concentration at the seal. This compensates for manufacturing tolerances and on-site assembly deviations, facilitating quick disassembly, maintenance, and seal replacement, reducing maintenance downtime. Simultaneously, by reducing dead angles and gas backflow space at the joint, it improves purging efficiency and saves on protective gas consumption.

[0024] The tin-immersion assembly 5 includes a fixing element 51 and a crossbeam 52. Multiple tin-immersion wire supports 7 are arranged in a linear array on the crossbeam 52 and located above the tin furnace 41. The fixing element 51 includes a fixing base 511 and a fixing rod 512. The fixing base 511 is provided with a groove 513, and the fixing rod 512 is provided on the groove 513. The groove 513 extends along the length direction of the tin furnace 41, and the fixing rod 512 adjusts the position of the crossbeam 52 along the length direction of the groove 513. Specifically, the tin-immersed wire support 7 includes a tin-immersing guide rod 71, a tin-immersing fixing block 72, and a tin-immersing guide wheel 73. The tin-immersing guide rod 71 is movably mounted on a crossbeam 52, and screws are provided on the crossbeam 52 for fixing the tin-immersing guide rod 71. The tin-immersing fixing block 72 is located at one end of the tin-immersing guide rod 71, and the tin-immersing guide wheel 73 is located on the tin-immersing fixing block 72 for guiding the wire toward the cooling wire assembly 6. The tin-immersing fixing block 72 is provided with a wire groove 721, which is opposite to the tin-immersing guide wheel 73. In this embodiment, the multi-point linear array tin-immersed wire support 7 can achieve parallel, equally spaced support and independent positioning of multiple wires, thereby ensuring that the tinning depth, angle, and relative spacing of each wire are consistent when immersed in molten tin, improving the consistency of the plating thickness and product yield, while significantly increasing the processing throughput. The groove 513 on the fixed base 511 and the fixed connecting rod 512 that slides along the groove allow the position of the crossbeam 52 to be adjusted arbitrarily along the furnace body. This facilitates rapid adjustment of the immersion area and support layout according to changes in the tin furnace 41 liquid level, different wire diameters, or process requirements, enabling rapid switching of process parameters and on-site fine-tuning, thus enhancing the equipment's adaptability and flexibility. The tin-immersion guide rod 71 is designed to be movable and fixed with screws, making it easy to assemble, disassemble, and position the individual guide rod. The wire groove 721 on the tin-immersion fixing block 72 and the matching tin-immersion guide wheel 73 form a stable wire positioning and guiding mechanism, which can effectively suppress wire vibration, lateral displacement, and mutual interference, ensuring that the wire enters the cooling wire assembly 6 smoothly and reducing collisions, splashes, or plating defects caused by misalignment.

[0025] The cooling wire assembly 6 includes a transmission fixing frame 61, a transmission drive module 62, and an output wire module 63. The transmission drive module 62 is mounted on the transmission fixing frame 61, and the cooling wire assembly 6 is mounted on the transmission drive module 62. The transmission drive module 62 drives the output wire module 63 to move relative to the solder pot 41. Specifically, the transmission drive module 62 includes a transmission frame 621, a drive motor 622, a transmission chain assembly 623, and a transmission guide rail 624. The transmission frame 621 is mounted on the transmission fixing frame 61, and the drive motor 622 is mounted on the transmission frame 621 and drivenly connected to the transmission chain assembly 623. The drive motor 622 drives the transmission chain assembly 623 to drive the output wire module 63 to slide along the transmission guide rail 624. The output wire module 63 includes a wire transmission seat 631 and an output wire wheel 632 mounted on the wire transmission seat 631. The wire transmission seat 631 is mounted on the transmission guide rail 624 and connected to the transmission chain assembly 623. In this embodiment, the rigid transmission link of drive motor 622—transmission chain 623—transmission guide rail 624 enables the output wire module 63 to move smoothly and controllably along a predetermined trajectory, thereby precisely controlling the wire's forward and backward position and dwell time relative to the tin furnace 41. This is crucial for controlling the cooling start position, cooling length, and tension recovery of the wire after tinning, which helps improve plating uniformity and reduce surface defects. The adjustable speed and programmable transmission method facilitates linkage adjustment for different wire diameters, different stretching rates, or different process cycles, improving the equipment's process adaptability and production capacity flexibility. The linear sliding and chain-driven connection between the wire drive seat 631 and the output wire wheel 632 ensures smooth traction and constant tension of the wire during the cooling process, reducing slippage, vibration, and lateral wire offset, thus reducing wire wear and processing defect rate. The modular structure and fixed frame support facilitate precise positioning, repetitive installation, and maintenance. The sealing and vibration damping design of the transmission chain 623 and guide rail extends service life and reduces operating noise.

[0026] See Figures 1-6 As shown, a tin plating method based on a wire tin plating apparatus includes the following steps: S1: Pretreatment and atmosphere establishment: The wire to be tinned is introduced through the atmosphere protection box 12 of the wire inlet assembly 1; the gas filling assembly 2 is activated to continuously introduce inert protective gas into the wire conduit 3, while maintaining a positive pressure inside the atmosphere protection box 12 to expel the air in the conduit and establish an oxygen-free tinning environment for the wire. S2: Preheating and guiding: The wire travels in the conductor pipe 3 filled with protective gas, and the radiant heat of the tin furnace 41 is used to preheat the wire so that its temperature gradually approaches the temperature of the molten tin. S3: Tin immersion and plating: After the preheated wire is led out from the outlet end of the wire conduit 3, it is immediately guided by the tin immersion guide roller 73 of the tin immersion assembly 5 and immersed into the molten tin in the tin furnace 41 at the set immersion angle and tension to complete the surface plating. S4: Cooling and Forming: The tin-plated wire is drawn out of the molten tin and received by the cooling wire assembly 6. By controlling its traction speed and ambient temperature, the tin layer on the surface of the wire is cooled and solidified evenly to form a smooth and continuous plating layer. S5: Post-processing and take-up: After being fully cooled, the tin-plated wire is guided by the output guide wheel 632 and pulled to the take-up device for winding; the entire process is monitored and recorded by the control unit.

[0027] The process of introducing inert protective gas in step S1 includes: first, purging the pipeline: injecting inert gas into the conductor pipeline 3 at a high flow rate to quickly remove air; then, maintaining the atmosphere: switching to a low flow rate maintenance mode and making the gas pressure in the atmosphere protection box 12 slightly higher than the outside atmospheric pressure to form a slightly positive pressure environment, effectively preventing air backflow. The tinning process in step S3 is precisely controlled by adjusting the tinning assembly 5: by adjusting the position of the fixed connecting rod 512 in the groove 513 of the fixed base 511, the overall height of the crossbeam 52 is changed, thereby controlling the immersion depth of the wire in the molten solder; by individually adjusting the extension length of each tinning guide rod 71 on the crossbeam 52 and the fixing screw, the lateral position of each guide wheel is finely adjusted to ensure that the immersion paths of multiple wires are parallel and consistent. It also includes full-process tension control: at the wire inlet, the tensioner at the inlet of the atmosphere protection box 12 provides the initial wire release tension F1; in the tin plating section, the process tension F2 is formed by the guidance of the tin-immersion guide roller 73 and the viscosity of the molten tin itself; at the wire outlet, the active traction tension F3 is provided by the transmission drive module 62 of the cooling wire assembly 6; the control unit dynamically monitors and coordinates F1, F2, and F3 to ensure that the wire is always in a constant optimal tension state throughout the entire process.

[0028] The tin plating method achieves high-quality, stable, and high-capacity tin plating through a synergistic process of atmosphere control, preheating, precise immersion, tension closed-loop, and cooling forming. On one hand, the dual-mode atmosphere establishment and purging / maintenance effectively removes air from the pipeline and maintains a slight positive pressure, significantly suppressing oxidation and splashing of the wire before and after entering the furnace, reducing oxide scale and surface defects, and minimizing rework and scrap. Preheating the wire within the conduit gradually brings its temperature close to that of the molten tin, improving wettability and molten tin flow, reducing thermal shock and poor molten tin adhesion, and facilitating the formation of a dense and uniform plating layer. Precise control of immersion depth and lateral position is achieved through the height of the beam 52 and fine-tuning of the guide rollers, enabling consistent wetting paths and tin layer thickness for multiple parallel wires, and allowing adjustment of plating thickness and uniformity as needed. Three-stage tension... (F1, F2, F3) Dynamic monitoring and coordination create a constant tension field to prevent wire sagging, vibration, or breakage, ensuring tinning stability and plating continuity, and improving yield. Cooling wire assembly 6 and traction speed are controlled in tandem to ensure rapid and uniform tin solidification, resulting in a smooth, drip-free plating with good adhesion, improving electrical performance and adaptability to subsequent processing. Switching gas flow from high to low quickly replaces air while conserving protective gas, reducing operating costs and environmental emissions. Monitoring and recording by the entire control unit enables process traceability, parameter optimization, and automated production, improving production stability and capacity. Overall, this method significantly improves tinning quality, stability, and economy, making it suitable for continuous and precision production needs.

[0029] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A wire tinning apparatus characterized by: The utility model provides an air -filled component, a lead pipe, a tinning component, a tin -immersion component and a cooling lead component are arranged on the rack, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin -immersion component, and the lead pipe is connected with the cooling lead component, the lead pipe is connected with the tin - 2. The wire tinning apparatus according to claim 1, characterized in that: ​ 3. The wire tinning apparatus according to claim 1, wherein: ​ 4. The wire tinning apparatus of claim 1, wherein: ​ 5. The wire tinning apparatus according to claim 4, wherein: ​ 6. The wire tinning apparatus of claim 1, wherein: ​ 7. The wire tinning apparatus according to claim 6, wherein: ​ 8. The wire tinning apparatus of claim 1, wherein: The cooling wire assembly comprises a transmission fixed frame, a transmission drive module and an output wire module, the transmission drive module is arranged on the transmission fixed frame, and the cooling wire assembly is arranged on the transmission drive module, and the transmission drive module is used for driving the output wire module to relatively move towards the tin furnace.

9. The wire tinning apparatus according to claim 8, wherein: The transmission drive module comprises a transmission frame, a drive motor, a transmission chain set and a transmission guide rail, the transmission frame is arranged on the transmission fixed frame, the drive motor is arranged on the transmission frame and is in driving connection with the transmission chain set; the drive motor is used for driving the transmission chain set to drive the output wire module to slide along the transmission guide rail; the output wire module comprises a wire transmission seat and an output wire wheel arranged on the wire transmission seat, and the wire transmission seat is arranged on the transmission guide rail and is connected with the transmission chain set.

10. A tinning method based on the tinning apparatus according to any one of claims 1 to 9, characterized by: The method comprises the following steps: S1: pretreatment and atmosphere establishment: The wire to be plated with tin is introduced into the atmosphere protection box of the wire inlet assembly; the gas filling assembly is started, and inert protective gas is continuously introduced into the wire pipeline, so that the inside of the atmosphere protection box is kept in a positive pressure state, so that the air in the pipeline is discharged, and an oxygen-free tin plating environment is established for the wire; S2: preheating and guiding: The wire travels in the wire pipeline filled with protective gas, and the wire is preheated by the radiation heat of the tin furnace, so that the temperature gradually approaches the temperature of the tin liquid; S3: tin immersion and plating: After the preheated wire is introduced from the outlet end of the wire pipeline, it is immediately guided by the tin immersion guide wheel of the tin immersion assembly to be immersed in the molten tin liquid of the tin furnace at a set immersion angle and tension, so as to complete surface plating; S4: cooling and forming: The tin-plated wire is introduced out of the tin liquid surface and is received by the cooling wire assembly, and the tin layer on the surface of the wire is uniformly cooled and solidified by controlling the pulling speed and the environmental temperature, so as to form a smooth and continuous plating layer; S5: post-treatment and wire winding: The completely cooled tin-plated wire is guided by the output wire wheel and is pulled to the wire winding device for winding; the key process parameters are monitored and recorded by the control unit throughout the process; The process of introducing inert protective gas in S1 comprises: First, the pipeline is purged: inert gas is injected into the wire pipeline at a high flow rate to quickly remove air; Then, the atmosphere is maintained: switch to a low-flow maintenance mode, and make the gas pressure in the atmosphere protection box slightly higher than the atmospheric pressure outside, to form a micro-positive pressure environment, effectively preventing air from flowing back; The tin immersion process in S3 is precisely controlled by adjusting the tin immersion assembly: By adjusting the position of the fixed connecting rod in the pull slot of the fixed base, the overall height of the cross beam is changed, so as to control the immersion depth of the wire in the tin liquid; By separately adjusting the extension length of each tin immersion guide rod on the cross beam and the fixed screw, the transverse position of each guide wheel is finely adjusted to ensure that the immersion paths of the multiple wires are parallel and consistent; It also includes whole-process tension control: At the wire inlet end, the tensioner at the inlet of the atmosphere protection box provides the initial wire unwinding tension F1; In the tin plating section, the process tension F2 is formed by the guidance of the tin immersion guide wheel and the viscous force of the tin liquid itself; At the wire outlet end, the transmission drive module of the cooling wire assembly provides active pulling tension F3; The control unit dynamically monitors and coordinates F1, F2, F3, so that the wire is always in a constant optimal tension state throughout the process.

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