Annealed annealed copper wire processing technology

Abstract

The invention provides an annealed annealed copper wire processing technology, which is applied to the technical field of copper wire processing, and is characterized in that a hard copper bare wire is coated with an ultrathin paint film, pre-annealing treatment is carried out, and then multi-pass oven heating annealing treatment is carried out, so that uniform annealing of a copper wire is ensured, and the softness and the processing quality are improved. And finally, a rubber shaft of an enameling machine is used for rolling and coating lubricating oil, the surface quality of the copper wire can be improved, and subsequent processing and use are facilitated. Through the combination of the technical means, the process can produce the high-performance and high-quality annealed copper wire, meanwhile, the production efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of copper wire processing, and in particular to a process for processing annealed soft copper wire. Background Art

[0002] In the traditional production process of soft copper wire, a small wire drawing machine with an annealing device is usually used for production. This method has some significant problems and limitations. First, when the contact annealing device anneals the copper wire, due to the effect of low voltage and high current, the hard copper bare wire is in direct contact with the annealing short-circuit ring, which can easily lead to poor surface quality of the processed soft copper wire and affect its performance in subsequent applications. Secondly, for copper wires with specifications below 0.350mm, the annealing current is difficult to control accurately, which increases the risk of wire breakage during the production process. In addition, in traditional processes, the winding method of soft copper wire usually uses an iron disc. Due to the limitation of the wire release space at the stranded wire customer's place, it is often necessary to rewind the soft copper wire on the iron disc onto the rubber shaft, which increases production costs and time.

[0003] As electronic devices have higher requirements for electrical conductivity and softness, the market demand for high-performance soft copper wire is growing. However, the soft copper wire production process in the prior art cannot simultaneously meet the requirements of high electrical conductivity, good softness and excellent surface quality. In addition, copper wire is easily oxidized when in contact with air during production and storage, resulting in performance degradation and shortening the service life of the product. Therefore, the development of a new annealed soft copper wire processing technology that can not only ensure the high performance of copper wire, but also improve production efficiency and reduce costs has become an urgent need for the development of the industry. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present application provides an annealing soft copper wire processing process, which is applied to the field of copper wire processing technology. By coating an ultra-thin paint film on the hard copper bare wire and performing a pre-annealing treatment, and then undergoing multiple furnace heating annealing treatments, the copper wire can be ensured to be uniformly annealed, thereby improving softness and processing quality. Finally, the enameling machine rubber shaft is used to wind it up and apply lubricating oil, which can improve the surface quality of the copper wire, thereby achieving the beneficial effects of ensuring the high performance of the copper wire, improving production efficiency and reducing costs.

[0005] In a first aspect, a process for processing annealed soft copper wire comprises the following steps: S1: coating a paint film with a thickness of less than or equal to 0.0005 mm on the hard copper bare wire, and pre-annealing the hard copper bare wire after coating the paint film; S2: subjecting the pre-annealed hard copper bare wire to a multi-pass furnace heating annealing treatment; S3: The enameling machine rubber shaft is used to first reel the soft copper wire after heating and annealing, and lubricating oil is applied to the surface of the soft copper wire during the reeling process.

[0006] The present application provides a processing technology for annealing soft copper wire, which can prevent oxidation of the copper wire and improve the conductivity by coating an ultra-thin paint film on the hard copper bare wire and performing a pre-annealing treatment. Secondly, multi-pass oven heating annealing treatment can ensure uniform annealing of the copper wire, improve softness and processing quality. Finally, using the enameling machine rubber shaft to reel and apply lubricating oil can improve the surface quality of the copper wire and facilitate subsequent processing and use. This process effectively solves the problems existing in traditional processes by finely controlling each processing step. The coating of ultra-thin paint film avoids direct contact between air and hard copper bare wire, which causes oxidation or corrosion damage to the surface of hard copper bare wire. The coating of ultra-thin paint film requires less power from the exhaust fan. Even if the exhaust fan runs at a lower speed, the exhaust gas generated during the coating process can still be discharged, saving energy consumption costs. Pre-annealing and multi-pass oven heating annealing treatment improve the annealing uniformity and controllability, and ensure the softness of the produced soft copper wire. The use of the enameling machine rubber shaft for direct winding solves the unwinding problem of the client and reduces the need for additional rewinding steps after the client purchases the product. Through the combination of these technical means, the process can produce high-performance, high-quality soft copper wire, while improving production efficiency and reducing costs. Therefore, the present application has the advantages of improving the conductivity and softness of soft copper wire, improving surface quality, reducing oxidation, improving production efficiency and reducing costs.

[0007] Furthermore, in step S1, a paint film having a thickness of less than or equal to 0.0005 mm is coated on the bare copper wire using felt coating, and the hard copper bare wire coated with the paint film is pre-annealed.

[0008] The present application provides a processing technology for annealing soft copper wire, and the felt coating has good coating uniformity and controllability, and can form a uniform paint film with a thickness of less than or equal to 0.0005 mm on the surface of the bare copper wire, which can effectively protect the surface of the copper wire and prevent oxidation and corrosion without significantly affecting the conductive properties of the copper wire.

[0009] Furthermore, in step S1, a polyurethane coating with a low solid content is selected to coat a paint film with a thickness of less than or equal to 0.0005 mm on the bare copper wire, and the hard copper bare wire coated with the paint film is pre-annealed.

[0010] The present application provides a processing technology for annealing soft copper wire. By selecting a low-solid content polyurethane coating as a paint film material, a uniform and dense protective layer can be formed on the surface of the bare copper wire. This coating has good adhesion and heat resistance, and can remain stable during the subsequent annealing process. The coating thickness is controlled below 0.0005mm, which can provide sufficient protection without significantly affecting the conductive properties of the copper wire. The hardness of the hard copper bare wire can be reduced through pre-annealing treatment, so that the soft copper wire finally produced can meet customer needs.

[0011] Furthermore, the content of polyurethane in the low-solid content polyurethane coating is 28%.

[0012] The present application provides an annealed soft copper wire processing process, which can form a thin and uniform protective film on the surface of the hard copper bare wire by using a low-solid content polyurethane coating, in which the polyurethane content accounts for 28%.

[0013] Furthermore, in step S1, the hard copper bare wire is painted seven times, so that a paint film with a thickness of less than or equal to 0.0005 mm is coated on the hard copper bare wire, and the hard copper bare wire is pre-annealed after each coating of the paint film.

[0014] Furthermore, in step S2, the pre-annealed hard copper bare wire is subjected to a multi-pass furnace heating annealing treatment by means of external heating radiation and heat conduction heating.

[0015] Furthermore, in step S2, the pre-annealed hard copper bare wire is subjected to at least seven furnace heating annealing processes.

[0016] Furthermore, in step S3, the diameter of the enameling machine rubber shaft is PT15 or PT25.

[0017] Furthermore, in step S3, the lubricating oil is an inert solvent.

[0018] Furthermore, the wax content in the inert solvent is not higher than 0.3%.

[0019] Beneficial effects: The present application provides an annealed soft copper wire processing process, which can prevent the copper wire from oxidation and improve the conductivity by coating an ultra-thin paint film on the hard copper bare wire and performing a pre-annealing treatment. Secondly, multi-pass oven heating annealing treatment can ensure uniform annealing of the copper wire, improve softness and processing quality. Finally, using the enameling machine rubber shaft to wind and apply lubricating oil can improve the surface quality of the copper wire and facilitate subsequent processing and use. This process effectively solves the problems existing in traditional processes by finely controlling each processing step. The coating of ultra-thin paint film avoids direct contact between air and hard copper bare wire, which causes oxidation or damage to the surface of hard copper bare wire. The coating of ultra-thin paint film requires less power from the exhaust fan. Even if the exhaust fan runs at a lower speed, the exhaust gas generated during the coating process can still be discharged, saving energy consumption costs. Pre-annealing and multi-pass oven heating annealing treatment improve the annealing uniformity and controllability, and ensure the softness of the produced soft copper wire. The use of the enameling machine rubber shaft for direct winding solves the unwinding problem of the client and reduces the need for additional rewinding steps after the client purchases the product. Through the combination of these technical means, the process can produce high-performance, high-quality soft copper wire, while improving production efficiency and reducing costs. Therefore, the present application has the advantages of improving the conductivity and softness of soft copper wire, improving surface quality, reducing oxidation, improving production efficiency and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A flow chart of an annealing soft copper wire processing process provided in this application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application usually described and marked in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first, second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] The following disclosure provides many different implementations or examples for achieving the purpose of the present invention, which solves the problem that the prior art soft copper wire production process cannot simultaneously meet the requirements of high conductivity, good softness and excellent surface quality.

[0024] For details, please refer to Figure 1 , a annealing soft copper wire processing process, comprising the steps of: S1: coating a paint film with a thickness of less than or equal to 0.0005 mm on the hard copper bare wire, and pre-annealing the hard copper bare wire after coating the paint film; S2: subjecting the pre-annealed hard copper bare wire to a multi-pass furnace heating annealing treatment; S3: The enameling machine rubber shaft is used to first reel the soft copper wire after heating and annealing, and lubricating oil is applied to the surface of the soft copper wire during the reeling process.

[0025] The annealed soft copper wire processing technology utilizes various production processes of the enameling machine. Through the selection of coatings, adjustment of processes, control of product requirements, etc., it replaces the small wire drawing machine process with an annealing device and directly invests in conventional wire drawing hard copper bare wire to produce annealed soft copper wire with good softness, good surface quality, and long oxidation resistance. The performance effect is equal to or even better than that produced by a small wire drawing machine with an annealing device.

[0026] This application solves the problem of processing quality and performance of soft copper wire through multiple steps. First, an ultra-thin paint film is applied to the hard copper bare wire and pre-annealed, which can prevent the copper wire from oxidizing and improve the conductivity. Secondly, multi-pass oven heating annealing treatment can ensure uniform annealing of the copper wire, improve softness and processing quality. Finally, using the enameling machine rubber shaft to rewind and apply lubricating oil can improve the surface quality of the copper wire and facilitate subsequent processing and use. This process effectively solves the problems existing in traditional processes by finely controlling each processing step.

[0027] Wherein, in step S1, an ultra-thin paint film with a thickness of less than or equal to 0.0005 mm is coated on the hard copper bare wire. By using such a thin paint film, the copper wire can be effectively prevented from oxidation, and the conductive properties of the copper wire will not be significantly affected. Selecting a suitable coating and coating method is the key to achieving this step. For example, a polyurethane coating with a low solid content can be used to achieve a uniform ultra-thin coating through a precisely controlled coating process, such as a felt coating method. After the coating is completed, the hard copper bare wire coated with the paint film is immediately pre-annealed. The purpose of the pre-annealing is to preliminarily improve the internal structure of the copper wire and prepare for the subsequent deep annealing. During the pre-annealing process, the pre-annealing temperature and pre-annealing time need to be adjusted according to the actual situation to ensure that the thin paint film just applied is not damaged, while achieving the expected annealing effect and preliminarily softening the hard copper bare wire. Since the paint film is extremely thin, the coating passes are seven times, and the amount of paint applied in each pass is very small, the exhaust fan speed can be reduced to 300r / min to reduce heat loss, increase production speed, and achieve the best comprehensive ton energy consumption.

[0028] In addition, since the current flows on the surface of the conductor (more obvious at high frequencies), if the paint film is thick, it will easily affect the distribution of spatial current density after twisting, and the thick paint film will also affect the total twisted outer diameter after twisting. After analysis, it is appropriate to control the paint film within the range of ≤0.0005mm.

[0029] In step S2, the hard copper bare wire after pre-annealing is subjected to multiple passes of furnace heating annealing. Multiple furnace heating can ensure that the copper wire is uniformly and fully annealed, thereby greatly improving its softness and processing quality. The temperature and time of each pass need to be accurately controlled according to actual conditions to achieve the best annealing effect. For example, a combination of external heating radiation and heat conduction heating can be used to gradually improve the internal structure and performance of the copper wire through at least seven passes of furnace heating annealing.

[0030] In step S3, the enameling machine rubber shaft is used to roll up the soft copper wire after the heating and annealing treatment, and lubricating oil is applied to the surface of the soft copper wire during the rolling process. In this step, first, the enameling machine rubber shaft is directly used for rolling, which avoids the extra step of rewinding the soft copper wire on the iron plate onto the rubber shaft after the customer purchases the product in the traditional process, greatly improving the unwinding efficiency of the client and improving customer satisfaction. Secondly, applying lubricating oil during the winding process can not only improve the surface quality of the copper wire, but also provide convenience for subsequent processing and use. In the prior art, the surface of the soft copper bare wire cannot be coated with lubricating oil, because the lubricating oil is directly in contact with the soft copper bare wire, which easily causes the copper material on the surface of the soft copper bare wire to oxidize. However, if the wire is not coated with lubricating oil, the subsequent process of unwinding and winding will easily stick to the wire and knot. Therefore, this process can prevent the oxidation of the copper material and ensure the smoothness of the wire surface by applying an ultra-thin paint film.

[0031] Compared with the prior art, the process of this application effectively solves the problem of easy oxidation of pure bare wires and the problem of poor conductivity of traditional copper wires by coating ultra-thin paint films and pre-annealing treatment. Secondly, since the bare wires produced by conventional wire drawing are hard wires with an elongation of less than 1%, in order to achieve the customer's requirement of more than 25%, the hard copper bare wire needs to be pre-annealed in the annealing furnace of the enameling machine and then needs to be reheated and annealed in multiple passes of the baking furnace. The more passes, the better. After multiple passes of furnace heating, the coated paint film is controlled in the range of ≤0.0005mm. Especially for copper wires with specifications below 0.350mm, this method can effectively reduce the risk of wire breakage. Finally, in the case where the client is a multi-strand stranded wire, the space for the wire laying position is limited, and conventional annealing wire drawing machines can only use 300 iron discs, which cannot meet the customer's wire laying needs. This application uses the enameling machine PT15 or PT25 rubber shaft wire collection to solve the problem. At the same time, in order to ensure the client's wire-laying requirements, the surface of the soft copper wire needs to be coated with relevant lubricants, but conventional lubricants cannot be coated (because the paint film is ≤0.0005mm, conventional lubricants can easily penetrate and directly affect the surface of the copper wire). It needs to be coated with inert solvent lubricants with extremely low wax content. The method of using the enameling machine's rubber shaft to directly wind and apply lubricants not only improves the product's surface quality and subsequent processing performance, but also improves customer satisfaction.

[0032] Furthermore, in step S1, a paint film having a thickness of less than or equal to 0.0005 mm is coated on the bare copper wire using felt coating, and the hard copper bare wire coated with the paint film is pre-annealed.

[0033] Among them, in practical applications, felt painting technology is used to achieve uniform coating of ultra-thin paint films. Felt painting is a precise and controllable coating method, which is particularly suitable for applying a uniform ultra-thin paint layer on copper wires with fine diameters. The fiber structure of the felt can hold an appropriate amount of paint and release it evenly on the surface of the copper wire, thereby forming a paint film with uniform thickness and continuity. In the specific implementation process, a suitable felt material and structure can be selected to adapt to copper wires and paint types of different specifications. For example, for thinner copper wires, a finer felt structure can be used; for paints with higher viscosity, a felt material with stronger adsorption capacity can be selected. By adjusting the contact pressure between the felt and the copper wire, the paint supply rate, and the moving speed of the copper wire, the thickness of the paint film can be accurately controlled to ensure that it does not exceed 0.0005mm.

[0034] After coating, pre-annealing is carried out immediately. The main purpose of pre-annealing is to preliminarily improve the internal structure of the copper wire and promote the curing of the paint film. This step requires careful control of temperature and time. For example, the furnace baking temperature can be set to: 280℃±20℃ at the entrance, 370℃±20℃ at the center, and 380℃±20℃ at the exit. The pre-annealing time is measured by DV (D represents the specification of the copper wire, which refers to the diameter or cross-sectional area of ​​the copper wire. V represents the speed, which refers to the speed at which the copper wire moves in the furnace). The larger the DV of the copper wire of the same specification, the shorter the time it stays in the furnace. The value of DV can be 26.

[0035] To ensure that the ultra-thin paint film just applied will not be damaged, while achieving the expected annealing effect. The temperature of the pre-annealing treatment is usually lower than the temperature of the main annealing treatment, and the time is relatively short, so that some internal stress can be released without over-softening the copper wire. The temperature of a typical pre-annealing furnace may be in the range of 200-400℃, and the actual temperature transferred to the copper material is about 200-300℃. The duration may range from a few minutes to tens of minutes. The specific parameters need to be optimized according to the specifications of the hard copper bare wire and the performance required by the customer.

[0036] Furthermore, in step S1, a polyurethane coating with a low solid content is selected to coat a paint film with a thickness of less than or equal to 0.0005 mm on the bare copper wire, and the hard copper bare wire coated with the paint film is pre-annealed.

[0037] Among them, a polyurethane coating with a low solid content is used as a paint film material. The polyurethane coating has excellent adhesion, heat resistance and wear resistance, and can form a uniform and dense protective layer on the surface of the hard copper bare wire. The low solid content property makes the coating have a lower viscosity, which is conducive to the formation of an ultra-thin paint film on the surface of the hard copper bare wire, thereby providing sufficient protection for the hard copper bare wire while minimizing the impact on the conductive properties of the copper wire. The technical solution of the present application has significant advantages in solving the problem of improving the surface quality and performance of copper wire during the processing of annealed soft copper wire, while protecting the copper wire from oxidation. The ultra-thin paint film formed by the low-solid content polyurethane coating provides an effective protective barrier for the copper wire, preventing the copper wire from oxidizing when it comes into contact with air, water vapor, salt spray and other harmful impurities during subsequent processing and storage. This protective effect not only extends the service life of the product, but also maintains the conductive properties of the copper wire.

[0038] Furthermore, the content of polyurethane in the low solid polyurethane coating is 28%.

[0039] Among them, in the annealed soft copper wire processing technology of this application, the low-solid polyurethane coating selected has a specific ratio, in which the content of polyurethane accounts for 28%, and this ratio can form a thin and uniform protective film on the surface of the hard copper bare wire. Due to the low solid content, the proportion of solvent in the coating is relatively high, which is conducive to the rapid and uniform distribution of the coating on the surface of the copper wire and rapid drying. The fast drying feature not only improves production efficiency, but also ensures the uniformity and density of the coating.

[0040] Compared with traditional processes, the coating with 28% polyurethane content provides sufficient protection while maintaining the flexibility of the coating. This allows the protective film formed on the surface of the hard copper bare wire after coating to effectively block oxygen in the air and prevent oxidation of the copper wire surface. This greatly extends the service life of the product and maintains the long-term performance stability of the copper wire. The copper wire still maintains good bending performance and meets the softness requirements of various application scenarios.

[0041] Furthermore, in step S1, the hard copper bare wire is painted seven times, so that a paint film with a thickness of less than or equal to 0.0005 mm is coated on the hard copper bare wire, and the hard copper bare wire is pre-annealed after each coating of the paint film.

[0042] Among them, the method of multiple painting can ensure the uniformity and integrity of the paint film, while accurately controlling the thickness of the paint film to less than 0.0005mm. Through the seven-pass painting process, an ultra-thin and uniform paint film layer can be gradually established. Each painting will fill in the tiny defects or unevenness that may exist in the previous painting, and finally form a high-quality protective layer.

[0043] In a specific embodiment, a precise painting equipment, such as a high-precision felt paint coating machine or a micro-spraying system, can be used. The amount of paint applied in each painting is extremely small. After each painting is completed, the film thickness is tested by an online infrared caliper, and the amount of paint applied is continuously adjusted according to the film thickness to ensure that the final paint film thickness does not exceed 0.0005mm. Between each painting, a short drying or curing time can be set to ensure the stability of the paint film. In the process of multi-pass painting, since the amount of paint applied in each pass is very small, the exhaust fan speed can be reduced to reduce heat loss, increase production speed, and achieve the best comprehensive ton energy consumption. For example, after completing multi-pass painting and pre-annealing treatment, the internal structure of the copper wire is preliminarily improved, and the bonding force between the paint film and the surface of the copper wire is enhanced. Among them, in the coating and painting process, each coat enters a baking oven to dry the paint of the coat, and a total of seven complete painting-baking-cooling processes are completed, that is, the pre-annealing treatment after painting is completed. The temperature and time of the pre-annealing treatment need to be carefully controlled, and it can usually be carried out in the temperature range of 200-400°C for 1-3 minutes. This temperature range is sufficient to promote the bonding of the paint film to the copper wire surface without damaging the ultra-thin paint film.

[0044] Furthermore, in step S2, the pre-annealed hard copper bare wire is subjected to a multi-pass furnace heating annealing treatment by means of external heating radiation and heat conduction heating.

[0045] Among them, the production of traditional annealed soft wire uses a contact annealing device (low voltage and high current). The hard copper bare wire is in direct contact with the annealing short-circuit ring, which can easily lead to poor surface effect of the hard copper bare wire, especially for specifications below 0.350mm. The annealing current is difficult to control and the wire is particularly easy to burn out.

[0046] In the process proposed in the present application, external heating radiation and heat conduction heating are used to ensure the surface quality of the hard copper bare wire, and all specifications of soft copper wires can be stably produced, which can effectively solve the problem of small specifications and easy burnout of wires. The heating method of the present application combines the advantages of external heating radiation and heat conduction heating. External heating radiation can quickly increase the surface temperature of the copper wire, while heat conduction heating ensures that the heat can be evenly distributed inside the copper wire. Through multi-pass furnace heating, the crystal structure of the copper wire can be gradually improved, and the internal stress can be reduced, thereby improving the softness and conductivity of the copper wire.

[0047] In a specific embodiment, an infrared heater can be used as an external heating radiation source, in conjunction with a conventional resistance heating element to achieve heat conduction heating. Multiple heating zones can be set in the oven, and the temperature of each zone can be independently controlled to achieve a precise temperature gradient. This setting allows fine adjustment of the temperature during the annealing process, thereby better controlling the microstructural changes of the copper wire.

[0048] The specific parameters of the multi-pass furnace heating annealing treatment, such as temperature, time and number of passes, need to be optimized according to the specifications and target performance of the copper wire. For example, for fine-gauge copper wires below 0.350 mm, a lower starting temperature and more passes can be used to avoid deformation or surface defects caused by rapid temperature rise. As the annealing process proceeds, the temperature can be gradually increased to eventually reach a fully annealed state. This heating annealing method can not only improve the performance of soft copper wires, but also significantly improve production efficiency. By optimizing the annealing process, the processing time can be shortened while ensuring product quality.

[0049] Furthermore, in step S2, the pre-annealed hard copper bare wire is subjected to at least seven furnace heating annealing processes.

[0050] Among them, the present application adopts a multi-pass furnace heating annealing treatment, especially at least seven passes, which can better control the annealing process and ensure that the hard copper bare wire is fully and evenly heat treated. This multi-pass treatment method helps to gradually improve the crystal structure of the copper wire and improve its softness and conductivity.

[0051] In a specific embodiment, a multi-pass furnace heating annealing treatment can be performed by combining external heating radiation with heat conduction heating. The temperature, time and atmosphere in the furnace of each pass need to be precisely controlled to achieve the best annealing effect. For example, the temperature of the first pass can be set in a lower range, such as 300-350°C, and then the temperature can be gradually increased, and the last few passes can reach 450-500°C. The processing time of each pass can be adjusted according to the specifications and required performance of the copper wire, usually between 30 seconds and 2 minutes.

[0052] Compared with the traditional one-time annealing treatment, the multi-pass annealing treatment method of the present application has significant advantages. First, it provides more sophisticated annealing process control, and can optimize the annealing process according to different specifications of copper wires or different performance requirements, so that the copper wire is not easily burned during the annealing process. Secondly, multi-pass treatment can better ensure the consistency and stability of product quality, especially for copper wires with specifications below 0.350mm, this method can effectively reduce the risk of wire breakage. Finally, by adjusting the annealing parameters of each pass, the performance of the soft copper wire can be precisely controlled to meet the strict requirements of high-performance electronic devices for wires.

[0053] Further, in step S3, the diameter of the enameling machine rubber shaft is PT15 or PT25.

[0054] Among them, in the annealing soft copper wire processing technology of the present application, selecting the appropriate diameter of the enameling machine rubber shaft is crucial to achieve efficient winding and protect the surface quality of the soft copper wire. Among them, PT15 refers to a full shaft of copper wire with a weight of 15 kg, and PT25 refers to a full shaft of copper wire with a weight of 25 kg. In the case where the client is laying out multi-strand stranded wire, the laying space is limited. Conventional annealing wire drawing machines can only use 300 iron discs, which cannot meet the customer's laying needs. Therefore, this application uses the enameling machine PT15 or PT25 rubber shaft for winding to solve the problem of insufficient laying space for the client in this scenario.

[0055] Further, in step S3, the lubricating oil is an inert solvent.

[0056] In the annealing soft copper wire processing technology of the present application, the inert solvent is a liquid with stable chemical properties and is not easy to react with other substances. In the process of winding the soft copper wire, the inert solvent is used as a lubricant to effectively lubricate the surface of the soft copper wire and avoid unnecessary chemical reactions with the copper wire.

[0057] In practical applications, appropriate inert solvents can be selected according to specific needs. For example, certain silicon-based solvents or perfluorinated compounds can be used, which not only have excellent lubricating properties but also have good chemical stability and thermal stability. In order to further improve the lubrication effect, an appropriate amount of wax can be added to the inert solvent, usually controlling the wax content within the range of 0.1% to 1%, which can protect the surface of the copper wire without causing adverse effects on subsequent processing.

[0058] Furthermore, the wax content in the inert solvent is not higher than 0.3%.

[0059] Among them, in the annealing soft copper wire processing process of the present application, the selection and formulation of lubricating oil has an important influence on the processing quality and performance of the soft copper wire. By accurately controlling the wax content in the inert solvent, the surface quality and performance of the copper wire can be maintained while improving the lubrication effect.

[0060] As the basic component of lubricating oil, inert solvent has the characteristics of high chemical stability and is not easy to react with copper wire. Adding wax to inert solvent can form a composite lubricating oil, which not only maintains the stability of inert solvent but also increases the lubrication effect. The wax content is not higher than 0.3% which is the result of careful optimization. This range can provide appropriate lubrication effect without excessively affecting the surface quality and conductive properties of copper wire.

[0061] In practical applications, the wax content can be adjusted within a range of no more than 0.3% according to different specifications of soft copper wire and specific production requirements. For example, for finer soft copper wire, a lower wax content, such as 0.1% to 0.2%, can be selected to ensure that the fine structure of the copper wire is not affected. For thicker soft copper wire, a higher wax content, such as 0.2% to 0.3%, can be selected to provide better lubrication protection.

[0062] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0063] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A process for processing annealed soft copper wire, characterized in that: Includes steps: S1: coating a paint film with a thickness of less than or equal to 0.0005 mm on the hard copper bare wire, and pre-annealing the hard copper bare wire after coating the paint film; S2: subjecting the pre-annealed hard copper bare wire to a multi-pass furnace heating annealing treatment; S3: The enameling machine rubber shaft is used to first reel the soft copper wire after heating and annealing, and lubricating oil is applied to the surface of the soft copper wire during the reeling process.

2. The annealed soft copper wire processing process according to claim 1, characterized in that: In step S1, a paint film having a thickness of less than or equal to 0.0005 mm is coated on the bare copper wire by using felt coating, and the hard bare copper wire coated with the paint film is pre-annealed.

3. The annealed soft copper wire processing process according to claim 2, characterized in that: In step S1, a polyurethane coating with a low solid content is selected to coat a coating film with a thickness of less than or equal to 0.0005 mm on the bare copper wire, and the hard copper bare wire after each coating of the coating film is pre-annealed.

4. The annealed soft copper wire processing process according to claim 3, characterized in that: The content of polyurethane in the low-solid polyurethane coating is 28%.

5. The annealing soft copper wire processing process according to claim 4, characterized in that: In step S1, the hard copper bare wire is painted seven times to coat the hard copper bare wire with a paint film having a thickness less than or equal to 0.0005 mm, and the hard copper bare wire coated with the paint film is pre-annealed.

6. The annealing soft copper wire processing process according to claim 1, characterized in that: In step S2, the pre-annealed hard copper bare wire is subjected to a multi-pass furnace heating annealing treatment by means of external heating radiation and heat conduction heating.

7. The annealed soft copper wire processing process according to claim 6, characterized in that: In step S2, the pre-annealed hard copper bare wire is subjected to at least seven furnace heating annealing processes.

8. The annealed soft copper wire processing process according to claim 1, characterized in that: In step S3, the diameter of the enameling machine rubber shaft is PT15 or PT25.

9. The annealed soft copper wire processing process according to claim 8, characterized in that: In step S3, the lubricating oil is an inert solvent.

10. The annealed soft copper wire processing process according to claim 9, characterized in that: The wax content in the inert solvent is not higher than 0.3%.

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