Method for manufacturing an aluminum wire for enameled wire

Abstract

The present application belongs to the field of aluminum alloy wire manufacturing, and particularly relates to a preparation method of aluminum wire for enameled wire, which uses 1070 type aluminum wire as raw material, and the composition and mass percentage of the aluminum wire are as follows: Si≤0.10%, Fe≤0.17%, Cu≤0.04%, Mn≤0.03%, Mg≤0.03%, Zn≤0.04%, V≤0.05%, and Ti≤0.03%. The mold is installed on the machine, and the aluminum wire is continuously extruded in the direction of the mold discharge port. The extruded aluminum wire is pulled into a cooling bed, cooled to room temperature, and bare wire is obtained. The bare wire is wound to form a coil shape. The fan and the multi-diameter air box quenching equipment through which the wire is extruded are closed before discharging. The coil-shaped bare wire is annealed to obtain O-state bare wire. Air cooling or fan internal circulation cooling is adopted. The present application adopts an aluminum extrusion process preparation method, which can complete the processing at one time, better solves the cost problem, and obtains a higher yield.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of aluminum alloy wire manufacturing, and particularly relates to a preparation method of aluminum wire for enameled wire. BACKGROUND

[0002] The enameled wire, as an important conductive component for covering the core of a motor, is composed of a conductor and an insulating layer, and the wire material is divided into copper material, copper-aluminum material and aluminum material. The bare wire is softened after annealing and then formed through multiple wire drawing. The aluminum wire core of the enameled wire is prepared by using an aluminum extrusion method, instead of a previous production process of multiple stretching, so as to reduce the production cost and the manual processing process.

[0003] At present, the aluminum wire is gradually processed to the required diameter by using a multiple-step wire drawing method, which is time-consuming and labor-intensive and increases the production cost. The aluminum wire is prepared by using an aluminum extrusion process in the application, the aluminum extrusion process is used to prepare the aluminum wire, and the previous product produced by using the multiple stretching process is removed. Meanwhile, the production cost is reduced, the manual processing process is reduced, the cost problem is better solved, the yield is completed at one time, and economic value is better generated. SUMMARY

[0004] In view of the problems in the prior art, the application provides a preparation method of aluminum wire for enameled wire.

[0005] (1) 1070 type aluminum wire is used as raw material; the composition and mass percentage of the 1070 type aluminum wire are as follows: Si≤0.10%, Fe≤0.17%, Cu≤0.04%, Mn≤0.03%, Mg≤0.03%, Zn≤0.04%, V≤0.05%, and Ti≤0.03%;

[0006] (2) The mold is hung out and installed on the machine, and the aluminum wire is continuously extruded in the direction of the mold discharge port; the extruded aluminum wire is pulled into a cooling bed and cooled to room temperature to obtain a bare wire; and the bare wire is wound to form a coiled shape;

[0007] (3) The fan through which the extruded aluminum wire passes and the multi-orifice air tank quenching equipment are closed before discharging;

[0008] (4) The coiled bare wire is annealed to obtain an O-state bare wire;

[0009] (5) The temperature of the bare wire obtained in the step (3) is reduced to not higher than 30 DEG C by using air cooling or fan internal circulation cooling;

[0010] The diameter of the 1070 type aluminum wire in the step (1) is 1.0-2.5 mm;

[0011] The extrusion in the step (2) is carried out by using a 5MN horizontal hydraulic machine, the extrusion temperature is 400-440 DEG C, and the extrusion speed is 6-8 m / min; the temperature of the die before being installed on the machine is 420-450 DEG C;

[0012] In the step (2), the pulling into the cooling bed is carried out at a uniform speed in the extrusion direction by using a pulling device; and the winding is carried out by using a self-made reel.

[0013] In the step (2), the cooling is natural cooling or cooling to room temperature by using an industrial axial flow fan.

[0014] In the step (4), the annealing treatment is carried out by loading into a floor type aging annealing furnace, the annealing temperature is 420-450 DEG C, and after reaching the annealing temperature, the furnace is kept for 2-4 hours and then discharged.

[0015] Because the raw material aluminum wire has a small diameter and a plurality of aluminum wires are extruded at the same time, the pulling device is used to pull at a uniform speed in the extrusion direction to prevent the mixing and disorder in the next process when the semi-finished product is loaded; in order to ensure the toughness of the aluminum wire, the self-made reel is used to manually correct and wind the aluminum wire on the cooling bed to form a roll, so that the aluminum wire is prevented from being disorderly stacked on the cooling bed; before discharging, the fan through which the on-line extrusion passes and the multi-diameter air tank quenching equipment are closed, so that the generation of lattice distortion internal stress is reduced, and the difficulty of subsequent annealing process adjustment of the product is reduced; the annealing and heat preservation process is used to reduce the size of the bare wire hardness , improve processability , eliminate residual internal stress, stabilize the size of the bare wire, reduce the tendency of internal deformation and crack of the structure, and adjust the structure refinement grains, easy to process tensile deformation ;

[0016] In view of the deficiencies in the prior art, the beneficial effects of the present application are:

[0017] At present, the aluminum wire is gradually processed to the required diameter by using a multi-process wire drawing method. As a kind of metal processing technology, the wire drawing process is time-consuming and laborious in metal pressure processing, and increases the production cost. The present application adopts an aluminum extrusion process preparation method, which can be processed at one time, better solves the cost problem, and obtains a high yield. BRIEF DESCRIPTION OF DRAWINGS

[0018] fig. 1 The present application is a process flow chart. DETAILED DESCRIPTION

[0019] In order to better illustrate the purposes, technical solutions and advantages of the present application, the present application will be further described in detail below in conjunction with specific embodiments. For those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

[0020] Example 1

[0021] A preparation method of an aluminum wire for enameled wire, the flow is shown as fig. 1 The specific implementation is as follows:

[0022] 1. 1070 type aluminum wire is used as raw material, the composition and mass percentage of the 1070 type aluminum wire are as follows: Si≤0.10%, Fe≤0.17%, Cu≤0.04%, Mn≤0.03%, Mg≤0.03%, Zn≤0.04%, V≤0.05%, Ti≤0.03%.

[0023] 2. Material extrusion: a 5MN horizontal hydraulic machine is used to extrude the raw aluminum rod, the extrusion temperature is 425℃, and the extrusion speed is controlled at 6m / min, then the mold is lifted out and installed on the machine, the mold temperature before the machine is 425℃, after adjusting the mold direction, the raw aluminum rod heated on the machine is continuously extruded in the direction of the mold discharge port; the extruded aluminum wire is smoothly pulled into the cooling bed by the traction clamping device, and naturally cooled to room temperature or cooled to room temperature by using an industrial axial flow fan.

[0024] 3. Turn off the fan and multi-caliber air box quenching equipment through which the material is extruded before discharging.

[0025] 4. Annealing: in order to obtain O state, the coiled bare wire is loaded into a floor type aging annealing furnace for annealing, the annealing temperature is 440℃, and after reaching the annealing temperature, the furnace is kept for 3.5h and discharged;

[0026] 5. After the end of the heat preservation process, air cooling or fan internal circulation cooling is adopted until the temperature of the bare wire is reduced to not higher than 30℃, and the aluminum wire numbered as 1# is obtained.

[0027] Example 2

[0028] A preparation method of an aluminum wire for enameled wire, the specific implementation is as follows:

[0029] 1. The same as step 1 of example 1.

[0030] 2. Material extrusion: the raw material aluminum bar is extruded by a 5MN horizontal hydraulic press, the extrusion temperature is 432℃, the extrusion speed is controlled at 7m / min, then the die is lifted out and installed on the machine, the die temperature before the machine is 441℃, after adjusting the die direction, the raw material aluminum bar heated on the machine is continuously extruded in the direction of the die discharge port; the extruded aluminum wire is smoothly pulled into the cooling bed by the traction clamping device, and naturally cooled to room temperature or cooled to room temperature by using an industrial axial flow fan.

[0031] 3. Before discharging, the fan and the multi-strand caliber air box quenching equipment through which the wire is extruded are closed.

[0032] 4. Annealing: to obtain O state, the coiled bare wire is loaded into a floor type aging annealing furnace for annealing, the annealing temperature is 440℃, after reaching the annealing temperature, the temperature is kept for 3.5h and then the furnace is discharged;

[0033] 5. After the end of the heat preservation process, air cooling or fan internal circulation cooling is adopted until the temperature of the bare wire is reduced to not higher than 30℃, and the aluminum wire numbered as 2# is obtained.

[0034] Example 3

[0035] 1. The same as step 1 of example 1.

[0036] 2. Material extrusion: the raw material aluminum bar is extruded by a 5MN horizontal hydraulic press, the extrusion temperature is 425℃, the extrusion speed is controlled at 7m / min, then the die is lifted out and installed on the machine, the die temperature before the machine is 445℃, after adjusting the die direction, the raw material aluminum bar heated on the machine is continuously extruded in the direction of the die discharge port; the extruded aluminum wire is smoothly pulled into the cooling bed by the traction clamping device, and naturally cooled to room temperature or cooled to room temperature by using an industrial axial flow fan.

[0037] 3. Before discharging, the fan and the multi-strand caliber air box quenching equipment through which the wire is extruded are closed.

[0038] 4. Annealing: to obtain O state, the coiled bare wire is loaded into a floor type aging annealing furnace for annealing, the annealing temperature is 450℃, after reaching the annealing temperature, the temperature is kept for 4h and then the furnace is discharged;

[0039] 5. After the end of the heat preservation process, air cooling or fan internal circulation cooling is adopted until the temperature of the bare wire is reduced to 30℃, and the aluminum wire numbered as 3# is obtained.

[0040] Example 4

[0041] 1. The same as step 1 of example 1.

[0042] 2. Material extrusion: using 5MN horizontal hydraulic press to extrude the raw material aluminum bar, the extrusion temperature is 436℃, the extrusion speed is controlled at 8m / min, then the mold is lifted out and installed on the machine, the mold temperature before the machine is 443℃, after adjusting the mold direction, the raw material aluminum bar heated on the machine is continuously extruded in the direction of the mold discharge port; the extruded aluminum wire is smoothly pulled into the cooling bed by the traction clamping device, and naturally cooled to room temperature or cooled to room temperature by industrial axial flow fan.

[0043] 3. Turn off the fan on line before discharging, multi-strand diameter air box quenching equipment.

[0044] 4. Annealing: in order to obtain O state, the coiled bare wire is loaded into the floor type aging annealing furnace for annealing, the annealing temperature is 450℃, after reaching the annealing temperature, it is kept for 3h and discharged;

[0045] 5. After the end of the heat preservation process, air cooling or fan internal circulation cooling is adopted until the temperature of the bare wire is reduced to 30℃, and the aluminum wire numbered 4# is obtained.

[0046] The resistivity of the aluminum wire in the above examples is tested, the equipment used is SMP-10 eddy current conductometer, and the test results are shown in Table 2:

[0047] Table 2

[0048]

[0049] The tensile test of the aluminum wire in the above examples is carried out, the equipment used is universal test tensile machine, and the test results are shown in Table 3:

[0050] Table 3

[0051]

Claims

1. A method for producing an aluminum wire for enameled wire, characterized by, It comprises the following steps: (1) using 1070 type aluminum wire as raw material; the component and mass percentage of the 1070 type aluminum wire are Si≤0.10%, Fe≤0.17%, Cu≤0.04%, Mn≤0.03%, Mg≤0.03%, Zn≤0.04%, V≤0.05%, Ti≤0.03%; (2) material extrusion: using 5MN horizontal hydraulic press to extrude raw material aluminum bar, the extrusion temperature is 400-440℃, the extrusion speed is controlled at 6-8m / min, then hoisting out the die to install on the machine, the die temperature before the machine is 420-450℃, after adjusting the die direction, the raw material aluminum bar heated on the machine is continuously extruded in the direction of the die discharge port; the extruded aluminum wire is smoothly pulled into the cooling bed by the traction clamping device, and is naturally cooled to room temperature or cooled to room temperature by using industrial axial flow fan, to obtain bare wire; the bare wire is wound to form a coil, and the winding is specifically performed by using self-made reel; (3) closing the fan passed by the on-line extrusion and the multi-diameter air box quenching equipment before discharging; (4) annealing: to obtain O state, the bare wire in coil shape is loaded into floor type aging annealing furnace for annealing, the annealing temperature is 420-450℃, after reaching the annealing temperature, the furnace is kept for 2-4h and discharged; (5) after the end of the heat preservation process, air cooling is adopted until the temperature of the bare wire is reduced to 30℃.

2. The method of producing an aluminum wire for an enameled wire according to claim 1, characterized by, The diameter of the 1070 type aluminum wire in the step (1) is 1.0-2.5mm.

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