Axially-wound self-adhesive composite insulated enameled wire and manufacturing method thereof

Abstract

The invention relates to an axially-wound self-adhesive composite insulated enameled wire and a manufacturing method thereof. The method comprises the following steps: processing a rod material into a bare wire blank by adopting an extrusion process; processing and drawing the bare wire blank into a bare conductor with a required size by adopting an online bundling and drawing process; annealing, cleaning, straightening or polishing the bare conductor to enable the surface of the bare conductor to meet the requirements of smoothness and smoothness; respectively coating three different types of insulating paint on the surface of the bare conductor, synchronously feeding the bare conductor into an oven for baking, and performing intelligent sectional type hot air circulation temperature control on the oven to form a composite insulating enameled wire; the composite insulation enameled wire is fed into an enameling machine and coated with epoxy self-adhesive paint, then the composite insulation enameled wire enters a drying oven to be baked, sectional temperature control is adopted in the drying oven, and the self-adhesive composite insulation enameled wire is obtained. The prepared self-adhesive composite insulated enameled wire has the advantages of excellent high paint film strength, high flexibility, high wear resistance, low friction coefficient, reheat bonding and the like.

Description

Technical Field

[0001] The invention relates to the technical field of enameled wires, in particular to an axially wound self-adhesive composite insulating enameled wire and a manufacturing method thereof. Background Art

[0002] Enameled wire is an essential and essential base material for the winding manufacturing of new energy equipment. With the rapid advancement of new energy equipment technology, market demand for enameled wire has continued to grow, particularly for high-performance products such as axially wound enameled wire, which exhibits high self-adhesion, high strength, excellent flexibility, and excellent wear resistance. Axially wound coils offer numerous advantages over traditional coils, including high current density, high magnetic field utilization, excellent heat dissipation, low operating noise, and reduced wire consumption. Consequently, they are widely anticipated to find wider application in new energy sectors such as photovoltaic power generation, automotive energy storage, and wireless charging.

[0003] Axially wound enameled wire requires not only extremely high hardness of the paint film to ensure structural stability, but also excellent toughness to resist mechanical stress, and good high-temperature and wear resistance. Therefore, the axial winding process places more stringent requirements on the physical and chemical properties of the enameled wire, making its manufacturing difficulty much higher than that of conventional enameled wire. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the To solve the above technical problems, the present invention provides a method for manufacturing an axially wound self-adhesive composite insulating enameled wire, comprising the following steps: S1: The rod material is processed into a bare wire blank by an extrusion process; in the extrusion process, the extrusion speed of the extruder is controlled at 20-80 m / min, the resilience is less than 3.2, and the elongation is greater than 40%; S2: processing the bare wire blank by an online drawing process to draw a bare conductor of a desired size; the drawing speed of the wire drawing process is 0 to 50 m / min; the online drawing process includes one or more of rounding, flattening, first drawing, and second drawing; S3: The bare conductor is annealed, cleaned, straightened or polished to achieve a smooth and bright surface. Subsequently, three different types of insulating varnish are applied to the surface of the bare conductor, including an innermost layer, an intermediate layer and an outermost layer, wherein the innermost layer uses a high-adhesion insulating layer; the intermediate layer uses a high-flexibility insulating layer; and the outermost layer uses a high-wear-resistant insulating layer. The conductors are simultaneously fed into a drying furnace for baking. The drying furnace adopts intelligent segmented hot air circulation temperature control, and the segmented temperature control is as follows: inlet section 80°C~140°C, first-stage heating zone 260°C~290°C, second-stage heating zone 290°C~310°C, and curing section 360°C~450°C. After the above treatment, a composite insulating enameled wire is formed. S4: The composite insulating enameled wire is fed into an enameling machine and coated with a self-adhesive layer, and then placed into an oven for baking; the oven adopts segmented temperature control, and the temperature range is: inlet section 100℃~170℃, first-stage heating zone 230℃~290℃, second-stage heating zone 320℃~380℃, and curing section 350℃~450℃; after treatment, the self-adhesive composite insulating enameled wire is obtained.

[0005] In one embodiment of the present invention, in step S1, the rod material is a copper rod or an aluminum rod, and the diameter of the copper rod or the aluminum rod is 9.5 mm, 11.5 mm or 12.5 mm. After extrusion processing, a bare wire blank with a diameter ranging from 3.0 mm to 8.0 mm is obtained.

[0006] In one embodiment of the present invention, in step S2, the bare conductor has a specification range of: a thickness range of 0.5 mm to 3.0 mm, a width range of 2.0 mm to 15.0 mm, and a maximum cross-sectional area not exceeding 45 mm².

[0007] In one embodiment of the present invention, in step S3, the specifications of the composite insulating enameled wire are: a thickness ranging from 0.5 mm to 3.0 mm, and a width ranging from 2.0 mm to 15.0 mm.

[0008] In one embodiment of the present invention, in step S3, the innermost layer uses a modified polyamide-imide paint with high adhesion; the middle layer uses a polyamide-imide paint with high flexibility; the outermost layer uses a high-molecular-weight polyamide-imide paint with high wear resistance; the thickness of the innermost layer ranges from 0.01 mm to 0.02 mm, the thickness of the middle layer ranges from 0.04 mm to 0.06 mm, and the thickness of the outermost layer ranges from 0.02 mm to 0.03 mm.

[0009] In one embodiment of the present invention, in step S3, the innermost layer is made of 9127 modified polyamide-imide paint, the middle layer is made of 19902ME polyamide-imide paint, and the outermost layer is made of 595KPF polyamide-imide paint.

[0010] In one embodiment of the present invention, in step S4, the self-adhesive material uses epoxy self-adhesive paint with a thickness of 0.01 mm to 0.03 mm.

[0011] In one embodiment of the present invention, in step S4, the specifications of the self-adhesive composite insulating enameled wire are: a thickness ranging from 0.5 mm to 3.0 mm, and a width ranging from 2.0 mm to 15.0 mm.

[0012] The invention provides an axially wound self-adhesive composite insulating enameled wire, which is manufactured by adopting the manufacturing method.

[0013] The above technical solution of the present invention has the following advantages over the prior art: The present invention discloses an axially wound self-adhesive composite insulating enameled wire and a method for producing the same. The enameled wire uses a variety of insulating varnish coatings and has the advantages of excellent high paint film strength, high flexibility, high wear resistance, low friction coefficient, and re-thermal bonding. This ensures that electrical products made from this type of enameled wire can be used in harsh environments such as large temperature and humidity changes and high vibration.

[0014] The voltage resistance of the enameled wire reaches over 4000V, ensuring that the wound coil has good inter-turn insulation, reducing the probability of short circuit and improving the stability of electrical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0016] Figure 1 It is a structural schematic diagram of the round blank of the present invention.

[0017] Figure 2 It is a structural schematic diagram of the flat blank of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the bare conductor of the present invention.

[0019] Figure 4 It is a structural schematic diagram of the composite insulating enameled wire of the present invention.

[0020] Figure 5 It is a structural schematic diagram of the self-adhesive composite insulating enameled wire of the present invention.

[0021] Description of the accompanying drawings: 101, round billet; 102. Flat stock; 300, bare conductor; 400, high adhesion insulation layer; 500, high flexibility insulation layer; 600, high wear-resistant insulation layer; 700, self-adhesive layer; 800, composite insulated enameled wire; 900. Self-adhesive composite insulated enameled wire. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0023] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0024] In the present invention, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of the present invention, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0025] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] A method for producing an axially wound self-adhesive composite insulating enameled wire comprises the following steps: S1: The rod material is processed into a bare wire blank by an extrusion process; a round blank 101 or a flat blank 102 is formed; the extrusion process is to use an extruder to continuously extrude a metal blank such as a copper rod or an aluminum rod through a die at high temperature or room temperature to obtain a wire blank with a reduced diameter and a dense structure. Figure 1 、 Figure 2 As shown; in the extrusion process, the extrusion speed of the extruder is controlled at 20~80 meters / minute, the rebound elasticity is less than 3.2, and the elongation is greater than 40%.

[0027] During the extrusion process, properly controlling the extrusion speed (20-80 m / min) allows the metal to recrystallize and uniformly deform under stress, significantly improving the material's internal structure and mechanical properties. A rebound resilience of less than 3.2 ensures dimensional stability and resists rebound deformation; an elongation greater than 40% facilitates subsequent processing. Adjusting the die type allows for round or flat billets, paving the way for the production of various enameled wire products.

[0028] The rod material is a copper rod or an aluminum rod, and the diameter of the copper rod or the aluminum rod is 9.5 mm, 11.5 mm or 12.5 mm. After extrusion processing, a bare wire blank with a diameter ranging from 3.0 mm to 8.0 mm is obtained.

[0029] S2: The bare wire blank is processed using an online drawing process to draw the bare conductor 300 into a desired size. The online drawing process utilizes a set of drawing dies to further draw the initially formed bare wire blank, gradually reducing the cross-sectional dimensions and improving the dimensional accuracy and surface finish of the wire.

[0030] Reference Figure 3 As shown; the drawing speed of the wire drawing process is 0~50 meters / minute; the online drawing process includes one or more passes of rounding, flattening, first wire drawing and second wire drawing. For example, rounding, flattening and first wire drawing can be skipped as needed, and only the second wire drawing can be used to draw the required bare conductor 300.

[0031] It should be noted that the first drawing pass refers to the initial drawing of the bare copper (or aluminum) wire billet through the first drawing die, which initially reduces the wire diameter (or thickness, width). The second drawing pass refers to the subsequent drawing through the second drawing die after the first drawing pass, which further reduces the wire size to meet more refined specifications.

[0032] The bare conductor 300 has a specification range of: a thickness range of 0.5 mm to 3.0 mm, a width range of 2.0 mm to 15.0 mm, and a maximum cross-sectional area not exceeding 45 mm².

[0033] Using copper rods or aluminum rods as the base material, through high-precision extrusion and online pulling processes, bare conductors with precise dimensions and excellent surface quality can be produced efficiently and continuously, significantly improving the basic mechanical strength and conductive properties of the wire, laying a solid foundation for subsequent coating processes.

[0034] S3: Annealing, cleaning, straightening or polishing the bare conductor 300. Specifically, the annealing furnace provided with the enameling machine can be used, and the temperature of the lower layer is set to 560°C and the upper layer is set to 580°C, so that the surface meets the requirements of being flat and smooth. Subsequently, three different types of insulating varnish are coated on the surface of the bare conductor 300, including the innermost layer, the middle layer and the outermost layer, respectively. The innermost layer uses a high-adhesion insulating layer 400; the middle layer uses a high-flexibility insulating layer 500; the outermost layer uses a high-wear-resistant insulating layer 600; and are simultaneously sent to a drying furnace for baking. The drying furnace adopts intelligent segmented hot air circulation temperature control, and the segmented temperature control is as follows: inlet section 80°C~140°C, first-stage heating zone 260°C~290°C, second-stage heating zone 290°C~310°C, and curing section 360°C~450°C. After the above treatment, a high-strength, high-flexibility and high-wear-resistant enameled wire is formed. Reference Figure 4 shown.

[0035] The specifications of the composite insulating enameled wire 800 are: thickness ranging from 0.5 mm to 3.0 mm, and width ranging from 2.0 mm to 15.0 mm.

[0036] Through processes such as annealing, cleaning, straightening or polishing, the surface of the bare conductor is made highly flat and clean, ensuring a close bond between the insulating varnish and the conductor interface, thereby improving product consistency and reliability.

[0037] It should be noted that the innermost layer is coated with a highly adhesive modified polyamide-imide varnish, which is in direct contact with the bare conductor 300. Its primary function is to provide excellent adhesion, ensuring a strong bond between the insulation layer and the conductor, and preventing delamination or blistering during subsequent processing or use. The middle layer is coated with a highly flexible polyamide-imide varnish, which imparts excellent flexibility to the enameled wire, making it less susceptible to cracking or breakage during winding and bending processes, thereby improving its processing adaptability and mechanical durability. The outermost layer is coated with a highly wear-resistant high-molecular-weight polyamide-imide varnish, which provides excellent wear resistance, enhancing the enameled wire's resistance to friction during use and extending its service life. Through the synergistic effect of the three insulating varnish layers with different properties, the enameled wire is comprehensively improved in terms of adhesion, flexibility, and wear resistance.

[0038] Exemplarily, the innermost layer uses a modified polyamide-imide paint with high adhesion; the middle layer uses a polyamide-imide paint with high flexibility; the outermost layer uses a high-molecular-weight polyamide-imide paint with high wear resistance; the thickness of the innermost layer ranges from 0.01mm to 0.02mm, the thickness of the middle layer ranges from 0.04mm to 0.06mm, and the thickness of the outermost layer ranges from 0.02mm to 0.03mm.

[0039] Optionally, the innermost layer is made of 9127 modified polyamide-imide paint from AEST, the middle layer is made of 19902ME polyamide-imide paint from IVA Changzhou Co., Ltd., and the outermost layer is made of 595KPF polyamide-imide paint from ELANTAS Tongling Co., Ltd.

[0040] S4: The composite insulating enameled wire 800 is fed into an enameling machine and coated with a self-adhesive layer 700, specifically using an epoxy self-adhesive paint with a thickness of 0.01mm to 0.03mm, and then placed in an oven for baking; the oven adopts a segmented temperature control, with a temperature range of: inlet section 100℃~170℃, first stage heating zone 230℃~290℃, second stage heating zone 320℃~380℃, and curing section 350℃~450℃; after treatment, a self-adhesive composite insulating enameled wire 900 is obtained. Figure 5 shown.

[0041] The specifications of the self-adhesive composite insulated enameled wire 900 are: thickness ranging from 0.5 mm to 3.0 mm, and width ranging from 2.0 mm to 15.0 mm.

[0042] Self-adhesive epoxy paint is applied to the outside of the composite insulation layer and heat-treated in a segmented temperature-controlled oven, giving the finished wire excellent self-adhesion capabilities. This facilitates subsequent automated axial winding and coil forming without the need for additional adhesives, greatly improving production efficiency and product assembly consistency.

[0043] The axially wound self-adhesive composite insulating enameled wire 900 obtained by the above-mentioned manufacturing method includes, from the inside to the outside, a bare conductor 300, a high-adhesion insulating layer 400, a high-flexibility insulating layer 500, a high-wear-resistant insulating layer 600, and a self-adhesive layer 700.

[0044] Afterwards, the self-adhesive composite insulating enameled wire 900 is wound on a bobbin, and the bobbin is placed on an automatic winding production line. The self-adhesive composite insulating enameled wire 900 is bent using automatic winding equipment to form a coil; the coil end is laser de-painted using a laser de-painting machine, and the soldering operation is completed with a soldering temperature range of 420°C±5°C. The coil is then baked with a baking temperature range of 130°C±5°C and a baking time of 240min±5min to obtain a self-adhesive composite insulating coil.

[0045] Example 1 This embodiment provides an axially wound self-adhesive composite insulated enameled wire, which includes, from inside to outside, a flat copper bare conductor 300, a high-adhesion insulation layer 400, a high-flexibility insulation layer 500, a high-wear-resistant insulation layer 600, and a self-adhesive layer 700.

[0046] The preparation method thereof comprises the following steps: S1: An 11.5 mm diameter upper copper rod was selected and its diameter was reduced to 4.0 mm by extrusion to obtain a bare copper wire billet; the extrusion speed was 80 m / min.

[0047] S2: The bare copper wire billet is passed through an online drawing machine, sequentially undergoing rounding, flattening, first drawing, and second drawing steps, to produce a bare copper flat conductor. The bare copper flat conductor has a thickness of 0.60 mm and a width of 8.00 mm. The online drawing speed is 18 m / min. In this example, an online drawing machine from Nantong Jinlun is used.

[0048] S3: The obtained bare copper flat conductor is annealed, cleaned, straightened or polished. Specifically, the annealing furnace provided by the enameling machine can be used, and the temperature of the lower layer is set to 560°C and the upper layer is set to 580°C to make the surface smooth and bright. Subsequently, three different types of insulating varnish are coated on the surface of the bare conductor 300 at a coating speed of 18 m / min. In this embodiment, an intelligent high-speed enameling machine developed by Giant Technology is used. The innermost layer uses 9127 modified polyamide-imide varnish with high adhesion; the middle layer uses 19902ME polyamide-imide varnish with high flexibility; the outermost layer uses 595KPF high molecular weight polyamide-imide varnish with high wear resistance; the thickness of the innermost layer is 0.015 mm, the thickness of the middle layer is 0.05 mm, and the thickness of the outermost layer is 0.025 mm. The oven utilizes intelligent segmented hot air circulation temperature control, with segmented temperatures as follows: 120°C at the inlet, 260°C at the first heating zone, 310°C at the second heating zone, and 400°C at the curing zone. This embodiment utilizes a high-speed intelligent enameling machine developed by GYT. After the aforementioned process, the resulting composite insulating enameled wire 800 boasts high strength, flexibility, and wear resistance, with specifications of 0.60mm thickness and 8.00mm width.

[0049] S4: After laying out the composite insulating enameled wire 800, the self-adhesive layer 700 is re-coated with a 0.02mm thick epoxy self-adhesive paint to form a self-adhesive composite insulating enameled wire 900 with a specification of 0.60mm thick x 8.00mm wide.

[0050] Testing revealed that the self-adhesive composite insulating enameled wire 900 obtained in this embodiment has a breakdown voltage of 5800V, no cracking when bent on an 8mm small edge (meaning that when subjected to a bending test with a minimum bending radius of 8mm, the paint film on the surface of the enameled wire does not crack), a solvent resistance of 5H (referring to the paint film's resistance to organic solvents such as alcohol and acetone, assessed through friction, immersion, or scratching tests), and a paint film hardness of 100+ (measured using a dedicated hardness instrument). Therefore, the self-adhesive composite insulating enameled wire of this embodiment exhibits excellent performance in terms of insulation strength, flexibility, chemical corrosion resistance, and mechanical strength. The self-adhesive composite insulating enameled wire 900 has extremely high electrical insulation performance, making it suitable for high-voltage operating environments and significantly improving product safety and reliability.

[0051] Example 2 This embodiment provides an axially wound self-adhesive composite insulated enameled wire 900, which includes, from the inside to the outside, a copper flat bare conductor 300, a high-adhesion insulation layer 400, a high-flexibility insulation layer 500, a high-wear-resistant insulation layer 600, and a self-adhesive layer 700.

[0052] The specific production methods include: S1: An 11.5 mm diameter upper copper rod was selected and the diameter was reduced to 4.0 mm by extrusion to obtain a bare copper wire blank; the extrusion speed was 80 m / min.

[0053] S2: The bare copper billet is passed through an online drawing machine, sequentially undergoing rounding, flattening, first drawing, and second drawing steps, to produce a bare copper flat conductor. The bare copper flat conductor has a thickness of 0.80 mm and a width of 6.50 mm. The online drawing speed is 15 m / min. This example uses an online drawing machine from Nantong Jinlun.

[0054] S3: The obtained bare copper flat conductor is annealed, cleaned, straightened or polished. Specifically, the annealing furnace provided by the enameling machine can be used, and the temperature of the lower layer is set to 560°C and the upper layer is set to 580°C, so that the surface is flat and smooth. Subsequently, three different types of insulating varnish are coated on the surface of the bare conductor 300. In this embodiment, an intelligent high-speed enameling machine produced by Giant Technology is used, with a coating speed of 5 m / min. The innermost layer is made of 9127 modified polyamide-imide varnish with high adhesion; the middle layer is made of 19902ME polyamide-imide varnish with high flexibility; the outermost layer is made of 595KPF high molecular weight polyamide-imide varnish with high wear resistance; the thickness of the innermost layer is 0.015 mm, the thickness of the middle layer is 0.05 mm, and the thickness of the outermost layer is 0.025 mm. The oven utilizes intelligent, segmented hot air circulation temperature control, with the following segmented temperatures: 120°C at the inlet, 260°C in the first heating zone, 310°C in the second heating zone, and 400°C in the curing zone. This treatment results in the formation of high-strength, highly flexible, and highly wear-resistant composite insulated enameled wire 800, with specifications of 0.80mm thickness and 6.50mm width.

[0055] S4: After laying out the composite insulating enameled wire 800, the self-adhesive layer 700 is re-coated with a 0.02 mm thick epoxy self-adhesive paint to form a self-adhesive composite insulating enameled wire 900 with a specification of 0.80 mm thick and 6.50 mm wide.

[0056] After testing, the self-adhesive composite insulating enameled wire 900 obtained in this embodiment has a breakdown voltage of 8600V, excellent electrical and mechanical properties, and no cracking occurs when the small side is bent with an 8mm small edge (meaning that when the bending test is performed with a minimum bending radius of 8mm, the paint film on the surface of the enameled wire will not crack), the solvent resistance is 5H (referring to the resistance of the paint film to organic solvents such as alcohol and acetone, etc., evaluated through friction, immersion or scratching tests), and the hardness of the scraped paint film reaches 100+ (measured by a special hardness instrument).

[0057] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for producing an axially wound self-adhesive composite insulating enameled wire, characterized in that: The steps include: S1: The rod material is processed into a bare wire blank by an extrusion process; in the extrusion process, the extrusion speed of the extruder is controlled at 20-80 m / min, the resilience is less than 3.2, and the elongation is greater than 40%; S2: processing the bare wire blank by an online drawing process to draw a bare conductor of a desired size; the drawing speed of the wire drawing process is 0 to 50 m / min; the online drawing process includes one or more of rounding, flattening, first drawing, and second drawing; S3: The bare conductor is annealed, cleaned, straightened or polished to achieve a smooth and bright surface. Subsequently, three different types of insulating varnish are applied to the surface of the bare conductor, including an innermost layer, an intermediate layer and an outermost layer, wherein the innermost layer uses a high-adhesion insulating layer; the intermediate layer uses a high-flexibility insulating layer; and the outermost layer uses a high-wear-resistant insulating layer. The conductors are simultaneously fed into a drying furnace for baking. The drying furnace adopts intelligent segmented hot air circulation temperature control, and the segmented temperature control is as follows: inlet section 80°C~140°C, first-stage heating zone 260°C~290°C, second-stage heating zone 290°C~310°C, and curing section 360°C~450°C. After the above treatment, a composite insulating enameled wire is formed. S4: The composite insulating enameled wire is fed into an enameling machine and coated with a self-adhesive layer, and then placed into an oven for baking; the oven adopts segmented temperature control, and the temperature range is: inlet section 100℃~170℃, first-stage heating zone 230℃~290℃, second-stage heating zone 320℃~380℃, and curing section 350℃~450℃; after treatment, a self-adhesive composite insulating enameled wire is obtained.

2. The method for manufacturing an axially wound self-adhesive composite insulating enameled wire according to claim 1, characterized in that: In step S1, the rod material is a copper rod or an aluminum rod, and the diameter of the copper rod or the aluminum rod is 9.5 mm, 11.5 mm or 12.5 mm. After extrusion processing, a bare wire blank with a diameter ranging from 3.0 mm to 8.0 mm is obtained.

3. The method for manufacturing an axially wound self-adhesive composite insulating enameled wire according to claim 1, characterized in that: In step S2, the bare conductor has a specification range of: a thickness range of 0.5 mm to 3.0 mm, a width range of 2.0 mm to 15.0 mm, and a maximum cross-sectional area not exceeding 45 mm².

4. The method for manufacturing an axially wound self-adhesive composite insulating enameled wire according to claim 1, characterized in that: In step S3, the specifications of the composite insulating enameled wire are: thickness ranging from 0.5 mm to 3.0 mm, and width ranging from 2.0 mm to 15.0 mm.

5. The method for manufacturing an axially wound self-adhesive composite insulating enameled wire according to claim 1, characterized in that: In step S3, the innermost layer uses a modified polyamide-imide paint with high adhesion; the middle layer uses a polyamide-imide paint with high flexibility; the outermost layer uses a high-molecular-weight polyamide-imide paint with high wear resistance; the thickness of the innermost layer ranges from 0.01 mm to 0.02 mm, the thickness of the middle layer ranges from 0.04 mm to 0.06 mm, and the thickness of the outermost layer ranges from 0.02 mm to 0.03 mm.

6. The method for manufacturing an axially wound self-adhesive composite insulating enameled wire according to claim 1 or 5, characterized in that: In step S3, the innermost layer is made of 9127 modified polyamide-imide paint, the middle layer is made of 19902ME polyamide-imide paint, and the outermost layer is made of 595KPF polyamide-imide paint.

7. The method for manufacturing an axially wound self-adhesive composite insulating enameled wire according to claim 1, characterized in that: In step S4, the self-adhesive material uses epoxy self-adhesive paint with a thickness of 0.01 mm to 0.03 mm.

8. The method for manufacturing an axially wound self-adhesive composite insulating enameled wire according to claim 1, characterized in that: In step S4, the specifications of the self-adhesive composite insulating enameled wire are: a thickness range of 0.5 mm to 3.0 mm, and a width range of 2.0 to 15.0 mm.

9. An axially wound self-adhesive composite insulating enameled wire, characterized in that: The preparation method is described in any one of claims 1 to 8.

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