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Pressing and stranding method for wire core of aluminum alloy conductor

A technology of aluminum alloy conductors and conductor cores, applied in cable/conductor manufacturing, electrical components, circuits, etc., can solve the problems of difficult compression, easy wire breakage, poor toughness, etc. Compression coefficient, the effect of improving the compression coefficient

Inactive Publication Date: 2011-08-24
ANHUI JOY SENSE CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Domestic cable conductor cores are usually copper cores. Due to the high resilience of copper wires, it is not easy to be compacted. Round regular stranding or compression stranding is used. The conductor outer diameter of this type of stranding method is large, which will not only affect the conductor's Electrical performance, and will cause waste of materials, high production costs
Compression stranding can overcome these disadvantages, but the conductor structure design of compression stranding is complex, the tooling mold design is complicated, the process is many, and the production cost is high, and the compression effect of ordinary aluminum or aluminum alloy cores is not very good. Poor toughness, easy to break wires when pressed tightly
[0004] Therefore, it is necessary to design a new process. This process can not only solve the problem of small compaction without increasing the processing cost, but also need to solve the problem that the wire is easy to break during the twisting process.
[0005] Although the pre-formed wire is used for secondary compression stranding, which can achieve a high compression coefficient, but first, the requirements for equipment are high and the process is more complicated; second, the compressed core wire is connected to the terminal It is easy to cause unstable connection, and the frequency of accidents is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for tightly compressing and twisting aluminum alloy conductor cores, comprising the following steps:

[0031] The first step is to design the diameter of the single wire, the number of single wires in each layer of the conductor core, and the Stranding diameter, pitch of each layer, stranding direction of conductor cores; stranding direction of conductor cores is left or right in the same direction;

[0032] In the second step, according to the designed diameter of the stranded wire core of each layer, select a compression mold of the corresponding size. When the number of single wires of the conductor core is ≤ 7, a circular closed mold is used. When the conductor core is single When the number of threads is ≥7, a circular open-close mold is used;

[0033] In the third step, according to the structure of the conductor, the rotation speed of the twisting cage and the speed of the tractor of the wire stranding machine are determined according to the conventiona...

Embodiment 2

[0040] Take the cable conductor specification 1AWG as an example.

[0041] According to the requirements of product standards, the conductor diameter of this specification is 7.67mm, and the minimum nominal cross-sectional area is 41.56mm 2 , The number of monofilaments is 19, and the minimum number is allowed to be 18. The pitch of the outermost layer is 8 to 16 times the outer diameter of the layer.

[0042] According to the requirements of the above standards, the following structure is designed, the number of single wires is 18, the diameter of single wire is 1.82mm, the diameter of the first layer conductor is controlled to be 4.90mm, and the diameter of the second layer conductor is controlled to be 7.55mm. The corresponding mold sizes are 4.90mm and 7.55mm, of which the 7.55mm mold is an open-close mold, and the 4.90mm mold is a closed mold.

[0043] The stranding equipment used is a 630 frame stranding machine, and the twisting direction of each layer is the same, and...

Embodiment 3

[0046] Take the cable conductor specification 500MCM as an example

[0047] According to the product standard requirements, the conductor diameter of this specification is 18.87mm, and the cross-sectional area is the minimum nominal value of 248.3mm 2 , The number of monofilaments is 37, the minimum number allowed is 35, and the pitch of the outermost layer is 8 to 16 times the outer diameter of the layer.

[0048]According to the above standard requirements, the following structure is designed, the number of single filaments is 36, the diameter of single filament is 3.10mm, the diameter of the first layer is controlled to be 8.40mm, the diameter of the second layer is controlled to be 13.60mm, and the diameter of the third layer is controlled to be 18.65mm. The corresponding mold sizes are 8.40mm, 13.60mm and 18.65mm respectively, among which the 13.60mm and 18.65mm molds are designed as split molds.

[0049] The stranding equipment adopted is a 500-frame stranding machine, ...

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Abstract

The invention relates to a pressing and stranding method for a wire core of an aluminum alloy conductor, which is realized through the following steps: determining the conductor diameter, the conductor cross section and the number of monofilaments of different types and specifications of cables according to requirements of product standard; designing the conductor structure and determining the number of the monofilaments and the diameter of the monofilaments according to the requirements of the standard on the conductor diameter, the section and the number of the monofilaments; designing a mold for stranding each layer of the wire core of the conductor according to the structural requirement of the conductor; and designing the pressing and stranding process for the conductor according to the requirement of the standard on pitch. The pressed and stranded wire core of the aluminum alloy conductor, which is processed by the method, is high in pressing degree and small in conductor diameter, and can reduce the material consumption, reduce the production cost, improve the electrical performances of the conductor and realize energy conservation and high efficiency in transmission.

Description

[0001] technical field [0002] The invention relates to a method for tightly compressing and twisting conductor wire cores, in particular to a method for tightly compressing and twisting conductor wire cores of power cables with aluminum alloy as material. Background technique [0003] Domestic cable conductor cores are usually copper cores. Due to the high resilience of copper wires, it is not easy to be compacted. Round regular stranding or compression stranding is used. The conductor outer diameter of this type of stranding method is large, which will not only affect the conductor's Electrical performance, and will cause material waste, high production costs. Compression stranding can overcome these disadvantages, but the conductor structure design of compression stranding is complex, the tooling mold design is complicated, the process is many, and the production cost is high, and the compression effect of ordinary aluminum or aluminum alloy cores is not very good. The ...

Claims

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Application Information

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IPC IPC(8): H01B13/02
Inventor 林泽民
Owner ANHUI JOY SENSE CABLE
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