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A kind of hollow copper flat wire and preparation method thereof

A copper flat wire and hollow technology, which is applied in the direction of cable/conductor manufacturing, conductor/cable insulation, cable, etc., can solve the problems that the hollow copper flat wire cannot achieve electrical insulation strength, length is limited, and material loss is large, etc., to achieve Good electrical insulation strength, unlimited length and low manufacturing cost

Active Publication Date: 2021-07-09
WUXI TOLY ELECTRIC WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing hollow copper flat wire is prepared by hot-rolling copper ingots to make a hollow blank, and then forming a hollow copper flat wire through multiple hot rolling or cold rolling. This method has long processing cycle, large material loss, and length Restricted, poor dimensional accuracy, high manufacturing cost
At the same time, the hollow copper flat wire alone cannot achieve the required electrical insulation strength

Method used

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  • A kind of hollow copper flat wire and preparation method thereof
  • A kind of hollow copper flat wire and preparation method thereof
  • A kind of hollow copper flat wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 Shown: a hollow copper flat wire, comprising a hollow copper flat wire core 1, the hollow copper flat wire core 1 is provided with an insulating paint film 2, and its preparation method includes the following steps,

[0025] (1) Processing of hollow copper flat wire core 1: such as Figure 4 , 5 As shown, two pure copper rods 4 with a diameter of 9.5 mm are respectively passed through the extrusion wheel 5 and enter the material storage chamber 6 through the material guide plate. The temperature of the copper rod 4 is 550°C and the pressure is 1000MPa. The pure copper rod 4 is heated by the frictional force of continuous extrusion to form constrained pure copper. The constrained pure copper is combined in the storage cavity 6 through the mold 7 from the upper and lower directions. Get up and extrude into a hollow copper flat wire core 1;

[0026] (2) Cooling and drying: pass the extruded hollow copper flat wire core through the anti-oxidation protect...

Embodiment 2

[0030] Such as figure 2 Shown: a hollow copper flat wire, comprising a hollow copper flat wire core 1, the hollow copper flat wire core 1 is provided with a thin film 3, and its preparation method includes the following steps,

[0031] (1) Processing of hollow copper flat wire core: such as Figure 4 , 5 As shown, two pure copper rods 4 with a diameter of 9.3 mm are respectively passed through the extrusion wheel 5 and enter the material storage chamber 6 through the material guide plate, and the rotating speed of the extrusion wheel 5 is set at 10 rpm. The temperature of the copper rod is 530°C and the pressure is 950MPa. The pure copper rod 4 is heated by continuous extrusion friction to form constrained pure copper. The constrained pure copper is combined in the storage chamber 6 through the mold 7 from the upper and lower directions. And extruded into a hollow copper flat core;

[0032] (2) Cooling and drying: Pass the extruded hollow copper flat wire core through the ...

Embodiment 3

[0035] Such as image 3 Shown: a hollow copper flat wire, comprising a hollow copper flat wire core 1, an insulating paint film 2 is arranged outside the hollow copper flat wire core 1, and a film 3 is arranged outside the insulating paint film 2, and the preparation method thereof comprises the following steps,

[0036] (1) Processing of hollow copper flat wire core: such as Figure 4 , 5 As shown, two pure copper rods 4 with a diameter of 9.7 mm are respectively passed through the extrusion wheel 5 and enter the material storage chamber 6 through the material guide plate, and the rotational speed of the extrusion wheel is set at 15 revolutions per minute, and the pure copper in the material storage chamber The temperature of the rod is 570°C and the pressure is 1050MPa. The pure copper rod 4 is heated by the friction force of continuous extrusion to form a restrained pure copper. The restrained pure copper is combined in the storage chamber 6 through the mold 7 from the upp...

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Abstract

The invention belongs to the technical field of cables and wires, and specifically relates to a flat copper hollow wire and a preparation method thereof. The flat copper flat wire includes a flat copper hollow core, and an insulating paint film (2 ) or film; the preparation method includes the following steps: (1) processing hollow copper flat wire core; (2) cooling and drying; (3) processing insulating paint film; (4) processing film wrapping. The invention has high machining dimensional accuracy (tolerance ±0.03mm), low manufacturing cost, unlimited length, high surface current density, good electrical insulation strength, and can withstand the test of various environmental factors. The outsourcing insulating varnish and The film has stable performance, strong adhesion, can withstand various subsequent processing, and has good processing performance; the structure is simple and compact, which is conducive to reducing the volume of the coil, reducing the amount of copper used, and can effectively reduce costs.

Description

technical field [0001] The invention belongs to the technical field of cables and wires, and in particular relates to a hollow copper flat wire and a preparation method thereof. Background technique [0002] Hollow copper flat wire is widely used in the manufacture of various high-power motor electrical windings, various magnet (such as accelerator magnets, etc.) coils, MRI gradient coils, etc. [0003] The existing hollow copper flat wire is prepared by hot-rolling copper ingots to make a hollow blank, and then forming a hollow copper flat wire through multiple hot rolling or cold rolling. This method has long processing cycle, large material loss, and length Restricted, poor dimensional accuracy, high manufacturing cost. At the same time, the hollow copper flat wire alone cannot achieve the required electrical insulation strength. Contents of the invention [0004] The present invention aims to solve the above problems, and provides a hollow copper flat wire and its pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/00H01B7/02H01B7/04H01B7/17H01B13/00H01B13/06H01B13/16H01B13/30H01B13/26
CPCH01B7/0009H01B7/02H01B7/04H01B7/17H01B13/00H01B13/065H01B13/16H01B13/2613H01B13/30
Inventor 张小波马栋梁吕东周俊杰王倩
Owner WUXI TOLY ELECTRIC WORKS
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