Introduction of wire and cable technology
Time of issue:
2020-01-05
In order to reduce the occupied area of wire and cable and reduce the geometric size of cable, the tight pressing form is adopted while stranding conductor, so that the ordinary circle can be changed into semicircle
In order to reduce the occupied area of wire and cable and reduce the geometric size of cable, the tight pressing form is adopted while stranding conductor, so that the ordinary circle can be changed into semicircle, fan-shaped, tile shaped and tight pressing circle. This kind of conductor is mainly used in power cables.
1. Single wire drawing of copper and aluminum
Copper and aluminum rods commonly used for wire and cable are used to pass through one or several die holes of drawing die by wire drawing machine under normal temperature, so as to reduce the cross section, increase the length and improve the strength. Wire drawing is the first process of wire and cable equipment in the company, and the main process parameter of wire drawing is die matching technology.
2. Single wire annealing
When the copper and aluminum monofilaments are heated to a certain temperature, recrystallization is used to improve the toughness and reduce the strength of monofilaments, so as to meet the requirements of wires and cables for conductor cores. The key of annealing process is to stop the oxidation of copper wire
3. Stranding of conductors
In order to improve the softness of wires and cables and facilitate the laying and installation, the conductive core is made of multiple single wires. From the stranding form of conductor core, it can be divided into regular stranding and irregular stranding. Irregular stranding can be divided into bundle stranding, concentric multiple stranding and special stranding.
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