What are the standards for copper wire testing by wire harness processors?

Copper wire is a component of the wire harness, copper wire quality problems related to the quality of the wire harness, so the wire harness processing manufacturers need to have a test standard for copper wire, then what are such standards?

1, the appearance of the test to be filled with copper wire spool on top of the packaging table, a hand holding a white paper on the distance from the copper wire 1 to 2 centimeters on the position of the other hand to the copper wire spool rolling week, and then visually look at its appearance has not reached the following standards. (1), the surface should be smooth, no messy line, no oxidation, and can not be touched on the scratch and so on. (2), the line should be uniform, no pile of edges and lack of edges, and there can be no strands of the situation. (3), the tension should be moderate, not too loose and not too tight. (4), in the copper wire rolling after the surface can not have sticky gray situation. 2, the wire diameter of the test wire diameter should be based on national standards to produce, if the customer has special requirements, but also need to be strictly controlled according to its requirements, the specific steps are as follows: (1), first debugging the micrometer is not zeroed. (2), the need to test the copper wire on the micrometer outside the clamp line, appropriate force to twist the end of the micrometer. (3), if you hear the micrometer ring three times, to immediately observe its reading. (4), to repeat the test, until the reading is the same can, each time can not detect the same position, to section of the test. 3, the elongation test elongation should be based on the relevant national standards to test, if the customer has special requirements, but also according to the requirements of the strict control, the specific steps are as follows: (1), to the elongation tester switch open (2), to check the left side of the copper wire Induction clip is not in the original position, the instrument shows the readings above there is no zero, if the left clip is not in the original place, and the instrument shows the readings are not zero, then immediately press the zero key and restore the key.

-4, on the 3M electronic products network platform related to the introduction and sales of products brief: 3M electronic products network - a professional agent / production / sales of a variety of {connectors | wiring harness | wire and cable products }; if you have a related [connectors | wiring harness | wire and cable products] purchasing / sourcing needs or would like to buy / to understand which connectors | wiring harness | wire and cable products we can provide solutions, please contact the Division I business personnel below; If you have related [connector | wire harness | wire and cable production] sales / resources and promotion needs, please click on the ¡¡ Business Cooperation ← ¡" to discuss with a person!