Mining cable quality inspection - Huaqiang Electronic Network

Check the appearance of the quality of the mining cable from the appearance of the mining cable. For the inspector, it is not an easy task. The scale of the main visual inspection is not well mastered. If the same product is inspected by different inspectors, different conclusions may be obtained. The appearance quality of mining cable products is very important. The first impression of quality is the appearance quality of the products. Therefore, all good products are very good.

Visual inspection of mining cables . For the inspector, it is not an easy task. The scale of the main visual inspection is not well mastered. If the same product is inspected by different inspectors, different conclusions may be obtained. The appearance quality of mining cable products is very important. The first impression of quality is the appearance quality of the products. Therefore, all good products pay attention to the appearance quality. For the appearance quality, production workers and inspection personnel cannot be ignored. Strict control is required to ensure the appearance quality. In spite of this, as long as we carefully study and master the standards and accumulate experience, we can use the standard samples to check if necessary, and we can do a good job of visual inspection of the products.
1 Round copper wire: Check whether the surface is smooth, with or without triangular mouth, burrs, cracks, folding and inclusions, and severe spots, pits, and corrosion spots of mechanical damage. It is worth mentioning that there is also the degree of oxidation of copper wire. Generally, golden yellow is normal, light red is slightly oxidized, and the surface is dark red and blue is severely oxidized. Any serious oxidation should be judged as waste disposal. There are many roads in the manufacturing process of aluminum wire, and should be strictly controlled when making overhead transmission lines.
2 Round aluminum rod: It is required to check the roundness, whether there are defects such as hemming, roundness, crack, inclusions, kinks and serious mechanical damage, pits, skins, flashing, corrosion spots and so on.
3 Aluminum is more than the surface of the wire, the wire should be twisted tightly and tightly, and there should be no looseness, single-wire kink, single-line jump or bump and single wire breakage. In addition, the joint welding of the single wire should be rounded and the welding is required to be treated with anti-corrosion treatment. The enlarged part of the joint is generally not allowed to exceed twice the diameter tolerance. The length of the two welded joints of the single-wire joint is also in accordance with the standard. The welding place shall be not less than 15 meters. The inner layer of the same layer shall be not less than 5 meters, and the outer layer shall be not less than 5 meters. The outer layer shall not be less than 15 meters. When the copper core is a single copper wire, welding shall not be allowed.
4. Appearance and structural dimensions of mining cables: The appearance and structural dimensions of mining cables are generally interspersed or carried out at the same time. The quality of the products is good or bad. On the one hand, the performance is excellent, but its appearance and structural size are The quality also accounts for a certain proportion. The appearance and structural size of the product have an impact on the performance of the mining cable.
a, local thinning, causing local heating, increased resistance, accelerated insulation aging.
b, rust spots, affecting the conductor joints, increased resistance, insulation is easy to age.
c. A bruise or scratch affects the mechanical strength of the conductor.

The visual inspection of the mining cable is to check the surface condition of the finished product, semi-finished product or material. The dimensional inspection is to evaluate each product according to the size of each part specified in the product standard. The structural inspection of the mining cable refers to the inspection of the structure of the various components of the mining cable. The appearance inspection, such as the oxidation of the copper wire, has an impact on the quality of the mining cable. The size can directly affect the performance of the product, such as the conductor. The outer diameter is related to its electrical resistance; the thickness and resistance of the insulation are related to the degree of withstand voltage; the pitch of the strand is related to the softness and firmness of the product. Structural inspection can expose the manufacturing quality of mining cables and find problems in the production process. Therefore, controlling the appearance and structural dimensions is the guarantee of product performance.