A method for manufacturing high-conductivity high-hardness flat enameled wire

Abstract

The application discloses a kind of flat enameled wire manufacturing method of high conductivity high hardness, it includes the following steps: S1: disc material pay-off;S2: blank is straightened;S3: blank is continuously extruded, until temperature reaches 500±100 DEG C, obtain flat wire;S4: flat wire is cooled using cooling medium;S5: blow dry cooling medium on flat wire;S6: flat wire is hydraulically drawn using multiple dies;S7: flat wire is tension straightening;S8: flat wire after tension straightening is coated with multiple passes using stepped die insulating paint layer;S9: flat wire is baked;S10: flat wire is cooled, obtain flat enameled wire.The application eliminates internal defects of material itself without annealing, heating and other steps, so that wire has high conductivity and high hardness, greatly reduces unit energy consumption, and has good economic benefits.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of enameled wire manufacturing, and particularly relates to a high-conductivity and high-hardness flat enameled wire manufacturing method. BACKGROUND

[0002] Enameled wire is a main variety of winding wire, which is composed of a conductor and an insulation layer. In order to avoid the conductor from being hardened due to the change of crystal lattice during the die stretching process, the semi-finished conductor needs to be annealed in an annealing furnace before being painted and baked, so that the molecular crystal lattice is rearranged to restore the required softness and eliminate some internal defects and internal stress of the conductor caused by the previous process, and then the conductor is painted and baked into a product in a varnishing machine. However, there are the following defects: (1) the annealing in the annealing furnace increases the unit energy consumption of the product; (2) it is difficult to control the tension in the annealing process, which easily leads to low hardness of the wire and affects the quality of the product. SUMMARY

[0003] The application aims to provide a high-conductivity and high-hardness flat enameled wire manufacturing method which can reduce unit energy consumption and has good economic benefits.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows:

[0005] A high-conductivity and high-hardness flat enameled wire manufacturing method, comprising the following steps:

[0006] S1: coil feeding;

[0007] S2: straightening the blank;

[0008] S3: continuously extruding the straightened blank by using a continuous extrusion die until the temperature reaches 500±100 DEG C, to obtain a flat wire;

[0009] S4: cooling the flat wire by using a cooling medium;

[0010] S5: blowing the cooling medium on the flat wire by using a compression fan or a vortex fan;

[0011] S6: hydraulically drawing the flat wire by using a multi-channel die, so that the flat wire meets the specification requirements;

[0012] S7: tension straightening the flat wire after the hydraulic drawing;

[0013] S8: coating the flat wire after the tension straightening with an insulation paint layer by using a stepped die;

[0014] S9: baking the flat wire after the insulation paint film coating by using an oven;

[0015] S10: cooling the flat enameled wire after the baking process by using the air blower through the air pipe and the cooler to obtain the flat enameled wire.

[0016] As a preferred scheme of the present application, it further comprises step S11: when the flat enameled wire needs to be coated with the self-adhesive paint layer, sequentially coating the flat enameled wire with the self-adhesive paint layer, baking, cooling, lubricating and winding treatment.

[0017] As a preferred scheme of the present application, it further comprises step S11: when the flat enameled wire does not need to be coated with the self-adhesive paint layer, sequentially lubricating and winding the flat enameled wire.

[0018] As a preferred scheme of the present application, the cross-sectional area of the flat enameled wire is 5mm 2 ~ 20mm 2 .

[0019] As a preferred scheme of the present application, in step S8, the insulating paint layer is PAI, PI, PU, PE or PEI.

[0020] As a preferred scheme of the present application, the self-adhesive paint layer is HB, SB or SV.

[0021] As a preferred scheme of the present application, in step S4, the cooling medium is a solution mixed by industrial pure water and industrial alcohol; wherein the concentration of the industrial alcohol is 1% to 5%.

[0022] As a preferred scheme of the present application, the blank in step S1 is a conductor metal material.

[0023] As a preferred scheme of the present application, the conductor metal material is copper or aluminum.

[0024] The present application provides a method for manufacturing flat enameled wire with high conductivity and high hardness, which has the following advantages compared with the prior art:

[0025] (1) The present application uses continuous extrusion die to continuously extrude the blank after straightening treatment until the temperature reaches 500±100℃ to obtain flat wire. The raw material blank can generate enough heat through the thermal deformation process of deformation and friction, so that the raw material blank can be plastic formed in a high temperature state in the thermal deformation process without additional annealing and heating steps, thereby completely eliminating the internal defects of the material itself, greatly reducing the unit energy consumption of the product, and having good economic benefits. In addition, since the continuous extrusion die is used in this step, the flat wire extruded at high temperature has better forming precision and good cross-sectional shape, so that the material density increases and the crystal grains are uniform and dense, thereby reducing the resistivity and more conducive to improving the quality and conductivity of the product.

[0026] (2), the flat wire after hydraulic drawing treatment is subjected to tension straightening treatment, which can improve the surface hardness and tensile strength of the wire rod, and can reduce the dimensional tolerance and geometric tolerance of the wire rod, thereby improving the precision and quality of the wire rod. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0028] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. It should be understood that the terms "first", "second" and the like are used to describe various information in the present application, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, the "first" information can also be referred to as "second" information, and similarly, the "second" information can also be referred to as "first" information without departing from the scope of the present application.

[0029] The preferred embodiment of the present application provides a method for manufacturing flat enameled wire with high conductivity and high hardness, which comprises the following steps:

[0030] S1: coil feeding; it should be noted that the blank used in this step is a conductor metal material, and the conductor metal material is preferably copper or aluminum.

[0031] S2: straightening treatment of the blank;

[0032] S3: continuous extrusion treatment of the straightened blank by using a continuous extrusion die until the temperature reaches 500±100℃, to obtain a flat wire; it should be noted that the continuous extrusion operation can generate sufficient heat through the deformation and friction of the raw material blank in the heat deformation process, so that the raw material blank can be plastic formed in a high temperature state in the heat deformation process without additional annealing, heating and other steps, thereby eliminating the internal defects of the material itself and greatly reducing the unit energy consumption, which has good economic benefits; in addition, since a continuous extrusion die is used in this step, the flat wire extruded at high temperature has better forming precision and good cross-sectional shape, thereby increasing the density of the material, making the crystal grains uniform and dense, and thereby reducing the resistivity and being more conducive to improving the quality and conductivity of the product.

[0033] S4: cooling the flat wire by using a cooling medium; the cooling medium is a solution mixed by industrial pure water and industrial alcohol; wherein, the concentration of the industrial alcohol is preferably 1% to 5%; it is to be noted that this step can avoid the oxidation of the flat wire;

[0034] S5: blowing the cooling medium on the flat wire by using a compression fan or a vortex fan;

[0035] S6: performing hydraulic drawing treatment on the flat wire by using a multi-pass die, so that the flat wire meets the specification requirements; it is to be noted that this step can make the wire surface smoother and the size more accurate;

[0036] S7: performing tension straightening treatment on the flat wire after the hydraulic drawing treatment; it is to be noted that this step can improve the surface hardness and tensile strength of the wire by tension straightening, and at the same time, can reduce the size tolerance and form tolerance of the wire, thereby improving the precision and quality of the wire;

[0037] S8: performing multi-pass coating of an insulating paint layer on the flat wire after the tension straightening treatment by using a stepped die; wherein, the insulating paint layer is preferably PAI, PI, PU, PE or PEI; it is to be noted that this step can precisely control the thickness of the insulating paint film on each side of the wire by the way of multi-pass coating of the insulating paint layer by the stepped die, thereby further improving the quality of the wire;

[0038] S9: performing baking treatment on the flat wire after the coating of the insulating paint film by using an oven;

[0039] S10: performing cooling treatment on the flat wire after the baking treatment by using a blower through a wind pipe and a cooler, to obtain a flat enameled wire.

[0040] It is to be noted that the embodiment further includes step S11: when the flat enameled wire needs to be coated with a self-adhesive paint layer, sequentially performing coating of a self-adhesive paint layer, baking, cooling, lubrication and take-up treatment on the flat enameled wire; wherein, the self-adhesive paint is preferably HB, SB or SV. When the flat enameled wire does not need to be coated with a self-adhesive paint layer, sequentially performing lubrication and take-up treatment on the flat enameled wire. Further, the cross-sectional area of the flat enameled wire is preferably 5mm 2 ~ 20mm 2 .

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connection" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The above is only the preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A method for manufacturing a flat enameled wire with high conductivity and high hardness, characterized in that, The method comprises the following steps: S1: coil unwinding; S2: straightening the blank, the blank being copper; S3: continuously extruding the straightened blank by using a continuous extrusion die, so that the blank generates heat through a thermal deformation process of deformation and friction until the temperature reaches 500±100 DEG C, realizing synchronous annealing treatment, eliminating internal defects of the material itself, and obtaining a flat wire; S4: cooling the flat wire by using a cooling medium, the cooling medium being a solution of industrial pure water mixed with industrial alcohol, wherein the concentration of the industrial alcohol is 1% to 5%; S5: blowing the cooling medium on the flat wire by using a compression fan or a vortex fan; S6: performing hydraulic drawing treatment on the flat wire by using a multi-pass die, so that the flat wire meets the specification requirements; S7: performing tension straightening treatment on the flat wire after the hydraulic drawing treatment; S8: performing multi-pass coating of an insulating paint layer on the flat wire after the tension straightening treatment by using a stepped die; S9: performing baking treatment on the flat wire after the coating of the insulating paint layer by using an oven; S10: performing cooling treatment on the flat wire after the baking treatment by using a blower through a wind pipe and a cooler, obtaining a flat enameled wire; S11: when the flat enameled wire needs to be coated with a self-adhesive paint layer, sequentially performing coating of the self-adhesive paint layer, baking, cooling, lubrication, and take-up treatment on the flat enameled wire; when the flat enameled wire does not need to be coated with the self-adhesive paint layer, sequentially performing lubrication and take-up treatment on the flat enameled wire.

2. The method of claim 1, wherein the flat enameled wire is made by the steps of: The cross-sectional area of the flat enameled wire is 5mm2 to 20mm2. ​ 3. The method for manufacturing a high-conductivity, high-hardness flat enameled wire according to claim 1, characterized in that, In the step S8, the insulating paint layer is PAI, PI, PU, PE, or PEI.

4. The method for manufacturing a high-conductivity, high-hardness flat enameled wire according to claim 1, characterized in that, The self-adhesive paint layer is HB, SB, or SV.