1. What are the quality requirements of stranded conductive wire core?

Answer: The stranded wire core should be tight, round, straight, no serious bending, no jump, no abrasion, flattening, copper wire surface no oxidation, black, tin layer off or tin particles, the pitch is even, the joint is smooth and firm, the wire diameter meets the tolerance regulations, the length meets the requirements.

2. What kind of preparation should the strander do before driving?
A: (1) Check whether all parts of the stranding machine are normal and whether there are obstacles in the operating part;

(2) Check whether mechanical and electrical equipment, electrical switches, fence insurance is normal;

(3) Check whether the butt welding machine is normal;

(4) Check whether the tools and measuring tools are complete;

(5) According to the dispatch order and process card requirements, select the pressing die, replace the pitch and tooth wheel, and replace the warp measurement line diameter.

3. What are the main causes of scratches and jumpers in the stranded wire core?
A: (1) The main causes of scratches are: guide wheel damage or lead jumping out of the guide wheel, threading pipe damage, mold damage or too small, disc rolling damage to the wire or rolling scratches. Prevention method: Replace the guide wheel to prevent the lead from jumping out of the guide wheel, replace the threading tube, select the press die, and replace the wire reel.

(2) The main reasons for the jumper are: the press die is too far from the splitter board, the size of the pay-off tension is inconsistent, the press die is too large, etc. Prevention method: reasonably adjust the distance between the die and the distributor plate, adjust the base of pay-off tension, and rationally select the die.

4. What is untwisted and twisted? Under what circumstances is it effective?

A: Untwisting twisting is to make each wire reel equipped with a single wire, with a special device (untwisting mechanism) always maintain a horizontal position to ensure that each single wire in the twisting process does not produce self-twisting deformation of the twisting is untwisting twisting twisting. Only when the single wire diameter is large, the pitch is large, and the single wire is hard, it will have a good effect.



5. Which two requirements must the structure of the fan core meet?

A: (1) The single lines on the center of the center layer should also be arranged on the center line of the fan, if this requirement can not be guaranteed, when the online core is bent, these single lines will be stretched or compressed, resulting in a single line bulge, resulting in a change in the shape of the fan core.

(2) Slip requirements: that is, the single line around the sector should be able to slide on the center layer, which is because the insulated sector line is wrapped and twisted into the cable core without torsion, and the single lines around the periphery strive to slide around the center surface, if this requirement is not met, the same single line will jump and destroy the shape of the sector line.

6, concentric layer twisted wire, the direction of the adjacent layer is opposite, why?

A: (1) The twisted wire is round, such as when the adjacent layer is twisted in the same direction, it is easy to produce a single line of the outer layer to be embedded in the inner layer, thus destroying the complete circular structure.

(2) When the twisted wire is pulled, the rotating torque generated by each layer is opposite, which can cancel each other, prevent the single line of each layer from rotating in the same direction and cause loose strands, and also avoid the phenomenon of looping when the twisted wire is not tightened. (3) In the steel core aluminum strand, the AC impedance can be reduced to reduce the corona phenomenon and the loss of electrical energy.

7. What are the two ways of stranding insulated wire cores that are often used at present? Which kind of domestic communication cable is currently used?

Answer: Pairs and stars. Domestic local communication cables are currently twisted.

8. The entrance of the die hole of the mold used in the cabling is trumpet shaped. Why?

A: There are two advantages to the trumpet shape at the entrance of the die hole:

(1) In order to gradually compress the twisted cable core;

(2) Do not chafe the cable core.


Qingdao Tianxing Cable Co., Ltd. is a technical enterprise specializing in the production of wire and cable in Shandong Province. After years of unremitting efforts, the company has established a good brand image in the industry, and built a new modern production base, updated some modern intelligent production equipment, and established a new enterprise management system of institutionalization, process and standardization. Enterprises adhering to the cultural purpose of "Tianxing Jian terrain Kun", to do a good job of wire and cable concept, and strive to be perfect, "good products, good service customers".