CN114283970A - Ultra-fine precision flat wire and production process thereof - Google Patents
Ultra-fine precision flat wire and production process thereof Download PDFInfo
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- CN114283970A CN114283970A CN202111612410.8A CN202111612410A CN114283970A CN 114283970 A CN114283970 A CN 114283970A CN 202111612410 A CN202111612410 A CN 202111612410A CN 114283970 A CN114283970 A CN 114283970A
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Abstract
The invention relates to a superfine precise flat wire and a production process thereof, comprising a metal flat conductor and an insulating layer which are annealed and rolled for two times or more; the thickness of the flat metal conductor is less than or equal to 0.08 mm; the edge angle of the flat metal conductor is an arc angle, and the angle of the edge angle is 157 +/-5 degrees; the insulating layer is coated and arranged outside the metal flat conductor. According to the ultra-fine precision flat wire, the wire is subjected to secondary annealing and rolling, so that the tissue defects, internal stress and surface stress caused by the former process are eliminated; the four corners of the wire are smoothly transited, the surface tension of the coated insulating layer at the four corners is reduced, the uniformity of a paint film is improved, the overall performance of the flat wire is greatly improved, the DCR of a product is greatly reduced, the section rate of a conductor is improved, and the problem of high impedance is solved; the ultra-fine precision flat wire is mainly suitable for the fields of various inductors, electric appliances, motors, voice coils, vehicle-mounted multimedia and the like, has obvious product advantages, and meets the requirements and applications in different fields.
Description
Technical Field
The invention relates to the technical field of enameled wires, in particular to an ultra-fine precision flat wire and a production process thereof.
Background
The enameled wire is a main variety of winding wire and mainly comprises a flat metal conductor and an insulating layer, and a bare wire is annealed and softened, then coated with paint for multiple times and baked. However, the production of modern high-end products is not easy to apply, and is influenced by the factors such as raw material quality, process parameters, production equipment, tool precision, actual environment and the like. Therefore, the quality characteristics of various enameled wires are different, but the enameled wires have four properties of mechanical property, chemical property, electrical property and thermal property; the enameled wire is a main raw material of various products such as inductors, electric appliances, motors, voice coils, vehicle-mounted multimedia and the like, particularly 5G mobile phones, 5G equipment, artificial intelligent machines, new energy sources and intelligent electric appliances and automobiles and the like are rapidly increased and demanded in recent years, and the high-end products have extremely high added values, so that the enameled wire brings wide fields and good prospects for the application of the enameled wire. With the consequent higher and more stringent requirements placed on the properties of the enamelled wire.
The product application always puts new demands on the enameled wire, so that the product structure adjustment of the enameled wire is inevitable, and the raw materials (metal and paint), the enameled process, the process equipment, the detection means and the like matched with the enameled wire are also urgently researched and developed. However, in the prior art, the problem of the flat enameled wire is more, and the requirements of customers cannot be met, referring to fig. 1, which is a schematic cross-sectional view of the flat enameled wire in the prior art, the flat enameled wire in the prior art is unevenly painted integrally, the angle a of the rectangular conductor is 118 ° ± 5 degrees, the surface stress is larger, after four corners are painted, a bone shape is easy to appear, and the paint film at the four corners is weaker than that at other positions, so that the overall performance of the flat enameled wire is poorer; in order to greatly reduce the DCR of the product and improve the section rate of the conductor so as to solve the problem of higher impedance, an innovative solution to the problem of sharp corner angle of the rectangular conductor of the ultra-fine precise flat wire is urgently needed.
Disclosure of Invention
Based on the above, the invention aims to overcome the defects in the prior art and provide an ultra-fine precision flat wire and a production process thereof.
An ultra-fine precision flat wire comprises a metal flat conductor and an insulating layer which are annealed and rolled twice or more; the thickness of the flat metal conductor is less than or equal to 0.08 mm; the edge angle of the flat metal conductor is an arc angle, and the angle of the edge angle is 157 +/-5 degrees; the insulating layer is coated on the surface of the metal flat conductor.
According to the ultra-fine precision flat wire, the wire is subjected to secondary annealing and rolling, so that the tissue defects, the internal stress and the surface stress caused by the front-stage process are eliminated; the four corners of the wire are smoothly transited, so that the surface tension of the coated insulating layer at the four corners is reduced, the uniformity of a paint film is improved, the overall performance of the flat wire is greatly improved, the DCR of a product is greatly reduced, the section ratio of a conductor is improved, the problem of high impedance is solved, and the insulation loss of the wire is reduced; the ultra-fine precision flat wire is mainly suitable for the fields of various inductors, electric appliances, motors, voice coils, vehicle-mounted multimedia and the like, has obvious product advantages, and meets the requirements and applications in different fields; by the novel manufacturing and production process, the edges and corners are shaped to be 157 +/-5 degrees, and then insulating paint is prepared through research and development of my department, so that the paint film on the surface of the whole conductor is uniformly coated, and the high-performance ultra-fine precise flat wire is manufactured.
Further, the insulating layer is a diluted AI, PI layer or AI + PI composite coating.
Further, the diluted AI, PI layer or AI + PI composite coating is formed by mixing a solvent and a diluent.
Further, the solvent includes NMP, DMF, DMSO, DMAC, and the like; the diluent is acetone and the like.
Furthermore, in the paint liquid of the insulating layer, the proportion of acetone is 1-15%.
The beneficial effects of adopting the above further scheme are that the main components of the insulating paint liquid solvents of AI and PI are NMP, DMF, DMSO and DMAC, the surface tension is within the range of 32.4 mN-41.0 mN, the surface tension is large, the paint film uniformity is not facilitated, especially the edge positions are diluted by adding 1% -15% of acetone, the insulating surface tension is less than or equal to 25mN, the surface tension of the coated insulating layer at four edge positions is further reduced, the uniformity of the paint film is improved, and especially the painting at four edge positions of the flat line is uniform.
Further, still include the self-adhesive layer: the self-adhesive layer is an HB layer or an SB layer or an SV layer.
The further scheme has the advantages that the self-adhesive layer is coated on the surface of the insulating layer, the next process of the product is adapted, the formation of the terminal product is facilitated, the performance and the quality of the finished product are improved, and the wire rod is solidified into a whole.
Furthermore, the thickness of the single side of the insulating layer is 0.5-15 μm, and the thickness of the single side of the self-adhesive layer is 0.5-7 μm.
Furthermore, the flat metal conductor is made of copper, silver, aluminum, alloy, copper-clad aluminum and tin-plated copper;
the nominal specification thickness T of the ultra-fine precise flat wire is less than or equal to 0.08mm, and the width W of the ultra-fine precise flat wire is less than or equal to 1.0mm
A production process of an ultra-fine precision flat wire comprises the following steps:
the method comprises the following steps: drawing a metal material semi-finished product into a specific round wire size according to the requirement of product specification through drawing;
step two; sequentially carrying out first high-temperature annealing and first rolling on the wire rod to enable the angle of the edge of the wire rod to be 118 +/-5 degrees; the purpose of the first high-temperature annealing is to eliminate certain structural defects and internal stress caused by the previous process; wire rods with the nominal specification of 10-80% can be obtained through first rolling, the R angle of a wire rod conductor is shaped into a half rectangular conductor, the width of the conductor is controlled to be 10% -90% of the nominal specification, and the angle of the edge angle of the rectangular conductor is 118 +/-5 degrees;
step three: sequentially carrying out second high-temperature annealing and second rolling on the wire rod to enable the angle of the edge of the wire rod to be 157 +/-5 degrees; the second high-temperature annealing aims to enable the surface of the conductor to reach a critical point of excessive softening, the surface stress of the metal material is smaller, the edge angle is reduced, and an arc angle is formed; rolling the wire rod to a nominal specification by the second rolling, shaping the wire rod conductor into a one-sixth rectangular conductor, wherein the conductor is high in flatness of a wide-side conductor, and the edges and corners of the rectangular conductor form arc angles after the second rolling, wherein the angles and corners of the rectangular conductor are 157 +/-5 degrees;
step four: coating insulating paint on the wire by adopting a high-voltage pulse numerical control closed spraying mode to enable the thickness of a single-side paint film to be 0.5-15 mu m; the wire can be coated once or for many times by high-pressure closed spraying, and the thickness of each side of the paint film can be accurately controlled;
step five: baking;
step six: cooling;
and 7: and (4) taking up and forming a finished wire rod in a lubricating or non-coating surface lubricating mode.
Further, in the sixth step, after cooling, the wire can be coated with self-adhesive paint, the thickness of a single-side paint film is 0.5-7 μm, and the wire is baked and cooled again, and then the seventh step is carried out.
Furthermore, the flat metal conductor is made of metal materials such as copper, silver, aluminum, alloy, copper-clad aluminum or tin-plated copper;
the first annealing temperature of the metal round conductor is as follows: copper: 300-350 ℃; silver: 350-400 ℃; aluminum: 200-300 ℃; alloy: 400-500 ℃; copper-clad aluminum: 200-300 ℃; tin plating and copper plating: 250 to 350 ℃;
the second annealing temperature of the flat metal conductor is as follows: copper: 400-600 ℃; silver: 500-750 ℃; aluminum: 350-450 ℃; alloy: 500-750 ℃; copper-clad aluminum: 300-400 ℃; tin plating and copper plating: 600-700 ℃;
the nominal specification thickness T of the finished wire is less than or equal to 0.08mm, and the width W of the finished wire is less than or equal to 1.0 mm.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic cross-sectional view of a prior art flat enameled wire according to the present invention;
FIG. 2 is a schematic cross-sectional view of an ultra-fine precision flat wire according to the present invention;
FIG. 3 is a schematic flow chart of the process for producing the ultra-fine precision flat wire of the present invention.
In the figure: 10. a flat metal conductor; 20. an insulating layer; 30. a self-adhesive layer; a. angle of edge.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that in the description of the present application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application. The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, i.e. a feature defined as "first", "second" may explicitly or implicitly include one or more of such features. Further, unless otherwise specified, "a plurality" means two or more.
It should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "hollow" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1 to 3, the present embodiment provides a super-fine precision flat wire and a manufacturing process thereof.
An ultra-fine precision flat wire comprises a flat metal conductor 10 and an insulating layer 20, which are annealed and rolled twice or more; the thickness of the flat metal conductor 10 is less than or equal to 0.08 mm; the edge angle of the flat metal conductor 10 is an arc angle, and the angle a is 157 +/-5 degrees; the insulating layer 20 is coated and arranged outside the flat metal conductor 10.
Specifically, the insulating layer 20 is a diluted AI layer or a diluted PI layer or an AI + PI composite coating.
Specifically, the diluted AI layer or the diluted PI layer is formed by mixing a solvent and a diluent;
specifically, the solvent comprises NMP, DMF, DMSO and DMAC; the diluent is acetone and the like;
specifically, the insulating paint liquid of the insulating layer 20 contains 1-15% of acetone;
AI. The main components of the insulating paint liquid solvent of the PI are NMP, DMSO, DMAC and DMF, the surface tension is within the range of 32.4 mN-41.0 mN, the surface tension is large, the paint film uniformity is not facilitated, particularly, the edge positions are diluted by adding 1% -15% of acetone, the insulating surface tension is less than or equal to 25mN, the surface tension of the coated insulating layer 20 at the four edge positions is further reduced, the uniformity of the paint film is improved, particularly, the painting at the four edge positions of a flat line is uniform, and therefore the performance of the product is ensured to be higher and more stable.
In the preferred embodiment, a self-adhesive layer 30 is also included: the self-adhesive layer 30 is an HB layer or an SB layer or an SV layer; by coating the self-adhesive layer 30 on the surface of the insulating layer, the wire forming performance is improved, the quality of a finished product is improved, and the wire is solidified into a whole.
In the preferred embodiment, the thickness of the single-sided paint film of the insulating layer 20 is 0.5-15 μm, and the thickness of the single-sided self-adhesive layer 30 is 0.5-7 μm.
According to the ultra-fine precision flat wire, the wire is annealed and rolled for two or more times, so that the tissue defects, internal stress and surface stress caused by the front-stage process are eliminated; the four corners of the wire are smoothly transited, so that the surface tension of the coated insulating layer 20 at the four corners is reduced, the uniformity of a paint film is improved, the overall performance of the flat wire is greatly improved, the DCR of a product is greatly reduced, the section ratio of a conductor is improved, the problem of high impedance is solved, and the insulation loss of the wire is reduced; the ultra-fine precision flat wire is mainly suitable for the fields of various inductors, electric appliances, motors, voice coils, vehicle-mounted multimedia and the like, has obvious product advantages, and meets the requirements and applications in different fields.
A production process of an ultra-fine precision flat wire comprises the following steps:
the method comprises the following steps: performing round wire drawing on the metal flat conductor 10 wire rod, and obtaining a rectangular conductor through rolling;
step two; sequentially carrying out first high-temperature annealing and first rolling on the wire rod to enable the angle a of the edge of the wire rod to be 118 +/-5 degrees; the purpose of the first high-temperature annealing is to eliminate certain structural defects and internal stress caused by the previous process; wire rods with the nominal specification of 10-80% can be obtained through first rolling, the wire rod conductor is shaped into a half rectangular conductor, the width of the conductor is controlled to be 10% -90% of the nominal specification, and the corner angle a of the rectangular conductor is 118 +/-5 degrees;
step three: sequentially carrying out second high-temperature annealing and second rolling on the wire rod to enable the angle a of the edge of the wire rod to be 157 +/-5 degrees; the purpose of the second high-temperature annealing is to enable the surface of the conductor to reach a critical point of excessive softening, the surface stress of the metal material is smaller, the edge angle is reduced, and an arc angle is formed; rolling the wire rod to a nominal specification by the second rolling, shaping the wire rod conductor into a one-sixth rectangular conductor, wherein the conductor is high in flatness of a wide-side conductor, and the edge angle a of the rectangular conductor is 157 +/-5 degrees after the second rolling;
step four: coating insulating paint on the wire by adopting a high-voltage pulse numerical control closed spraying mode to enable a single-side paint film to be 0.5-15 mu m; the wire can be coated once or for many times by high-pressure closed spraying, and the thickness of each side of the paint film can be accurately controlled;
step five: baking;
step six: cooling;
and 7: and (3) taking up and forming a finished wire rod in a lubrication or non-coating surface lubrication mode, wherein the nominal specification thickness T of the finished wire rod is less than or equal to 0.08mm, and the width W of the finished wire rod is less than or equal to 1.0 mm.
Specifically, in the sixth step, after cooling, according to the actual needs of the customers, the wire can be coated with the self-adhesive paint, and then the wire is baked and cooled, and then the seventh step is performed.
Specifically, the material of the flat metal conductor 10 is copper, silver, aluminum, alloy, copper-clad aluminum or tin-plated copper;
the first annealing temperature of the flat metal conductor is as follows: copper: 300-350 ℃; silver: 350-400 ℃; aluminum: 200-300 ℃; alloy: 400-500 ℃; copper-clad aluminum: 200-300 ℃; tin plating and copper plating: 250 to 350 ℃;
the second annealing temperature of the flat metal conductor is as follows: copper: 400-600 ℃; silver: 500-750 ℃; aluminum: 350-450 ℃; alloy: 500-750 ℃; copper-clad aluminum: 300-400 ℃; tin plating and copper plating: 600-700 ℃.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. An ultra-fine precision flat wire, comprising:
the metal flat conductor is annealed and rolled for the second time or more, and the thickness of the metal flat conductor is less than or equal to 0.08 mm; the edge angle of the flat metal conductor is an arc angle, and the angle of the edge angle is 157 +/-5 degrees;
and the insulating layer is coated and arranged outside the metal flat conductor.
2. The ultra-fine precision flat wire according to claim 1, wherein the insulating layer is a diluted AI, PI layer or AI + PI composite coating.
3. The ultra-fine precision flat wire according to claim, wherein said diluted AI, PI layer or AI + PI composite coating layer is formed by mixing a solvent and a diluent.
4. The ultra-fine precision flat wire according to claim 3, wherein said solvent comprises NMP, DMF, DMSO, DMAC; the diluent is acetone.
5. The ultra-fine precision flat wire according to claim 4, wherein the insulating layer is diluted with acetone in a proportion of 1% to 15% in the insulating varnish liquid.
6. The ultra-fine precision flat wire according to claim 5, further comprising a self-adhesive layer: the self-adhesive layer is an HB layer or an SB layer or an SV layer.
7. The ultra-fine precision flat wire according to claim 6, wherein the insulation layer has a single-sided thickness of 0.5 to 15 μm and the self-adhesive layer has a single-sided thickness of 0.5 to 7 μm.
8. The ultra-fine precision flat wire according to claim 7, wherein the material of the metal flat conductor is copper, silver, aluminum, an alloy, copper-clad aluminum, tin-plated copper;
the nominal specification thickness T of the ultra-fine precision flat wire is less than or equal to 0.08mm, and the width W of the ultra-fine precision flat wire is less than or equal to 1.0 mm.
9. A production process of an ultra-fine precision flat wire is characterized by comprising the following steps:
the method comprises the following steps: drawing a metal material semi-finished product into a specific round wire size according to the requirement of product specification through drawing;
step two; sequentially carrying out first high-temperature annealing and first rolling on the wire rod to enable the angle of the edge of the wire rod to be 118 +/-5 degrees;
step three: sequentially carrying out second high-temperature annealing and second rolling on the wire rod to enable the angle of the edge of the wire rod to be 157 +/-5 degrees;
step four: coating insulating paint on the wire by adopting a high-pressure closed pulse numerical control spraying mode to enable the thickness of a single-side paint film to be 0.5-15 mu m;
step five: baking;
step six: cooling;
and 7: and (4) taking up and forming a finished wire rod in a lubricating or non-surface-lubricating mode.
10. The process for producing ultra-fine precision flat wire according to claim 9, wherein in the sixth step, after cooling, the wire is coated with a self-adhesive paint having a thickness of 0.5 to 7 μm on one side, and then baked and cooled, and then the process proceeds to the seventh step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111612410.8A CN114283970A (en) | 2021-12-27 | 2021-12-27 | Ultra-fine precision flat wire and production process thereof |
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| CN202111612410.8A CN114283970A (en) | 2021-12-27 | 2021-12-27 | Ultra-fine precision flat wire and production process thereof |
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