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laurel cable: basic requirements for the appearance of wire and cable products
from：guichao author：admin click： 460 addtime：2017-06-04 17:30:54
(1) the round aluminum rod needs to check the roundness,
are there hem, wrong circle, crack, inclusion?,
defects such as kinks and severe mechanical damages,
pits, peeling, edges, corrosion stains, etc.
(2) round copper wire
check whether the surface is bright and clean and whether or not there is a triangle,
burrs, cracks, folds and inclusions and severe spots,
pitting, mechanical damage, pitting, etc..
it is worth mentioning that there is also the degree of oxidation of copper wire,
general golden yellow for normal, pale red for slight oxidation,
the surface is dark red and blue when it is seriously oxidized,
in case of severe oxidation, waste treatment shall be considered.
aluminum appear more in the manufacturing process line,
overhead transmission lines should be kept under strict control.
(3) aluminum on the line surface
wire and cable products should be twisted, tight, neat, not loose,
the kink of a single line, the jumping out or protrusion of a single line, and the fracture of a single line.
in addition, welds should be rounded and welded in single line joints where corrosion protection has been required,
most of the joints are not allowed to exceed two times the diameter tolerance,
single line joint two, welding space length should also meet the standard,
the same single line two welds shall be no less than 15 meters,
the same layer, not the same single line, two welding spacing, the inner layer is not less than 5 meters,
the outer layer is not less than 15 meters, and the copper core is a single copper wire. welding is not allowed.