The so-called copper stranded wire refers to a new type of composite conductor made of high-quality low-carbon steel as the core, copper-plated, and several single wires twisted according to certain rules. Copper stranded wire is a soft connecting wire for power transmission and distribution, electrical devices (such as transformers, electric furnaces), electronic and electrical equipment, and thyristor components. In addition, copper stranded wire can also be used as grounding wire for electrical work. The copper stranded wire is realized by the stranded single wire rotating around the stranding axis at a constant angular speed and the stranded wire moving forward at a uniform speed. Copper stranded wire can be divided into two types: hard copper stranded wire and soft copper stranded wire. Each of them has its own characteristics and uses.

1. Copper plays a role in conducting weak electrical signals, while steel wire plays a supporting role. According to the different methods of wrapping copper to steel wire, it is mainly divided into electroplating, cladding, hot casting/immersion and electroforming. This product combines the strength and toughness of steel with the good electrical conductivity and corrosion resistance of copper. Compared with copper single wire, it has the advantages of low density, high strength and low cost. It is an updated product of traditional pure copper single wire.

2. The use of copper stranded wires can reduce the operating temperature. Compared with single stranded wires of the same cross-sectional area, stranded wires have higher mechanical flexibility. Widely used in lines with high "Q" value.

3. Copper stranded wire is made of high-quality copper wire or tinned soft copper wire. After toughening during the processing, the finished product is soft, neat and beautiful in appearance.

4. Advantages of hard copper stranded wire and soft copper stranded wire:

(1) Hard copper stranded wire: strong tensile strength, relatively strong, low resistance and good conductivity

(2) Soft copper stranded wire: Usually thinner than hard copper stranded wire, its conductivity is particularly high and it is tough.

5. Advantages of insulated copper stranded wire: high tensile strength.

1. Unique manufacturing process: using cold rolling and hot drawing production process to achieve a high degree of combination of copper and steel.

2. Excellent anti-corrosion performance: The surface copper layer is thick (average thickness is greater than 0.3mm), has strong corrosion resistance, and has a service life of more than 30 years.

3. Better electrical conductivity: Because the surface copper material has excellent electrical conductivity, its own resistance is much lower than that of conventional materials.

4. Wide range of use: This product is suitable for soil conditions with different humidity, temperature and PH value.

5. Safe and fast to use: complete accessories, using special connecting pipes or hot melt flux produced by our company for connection, the joints are firm and easy to install, which greatly improves construction efficiency.

6. Reduced construction costs: Compared with the traditional use of pure copper materials for grounding, the cost is greatly reduced.

1. Military covered wire conductors; power industry grounding rods; braided shielded wires for power cables; connectors for various electronic components; reinforced conductive cores for special cables; overhead lines for power transmission and telephone lines; parallel dual-core telephone users Conductors of communication lines; load-bearing cables and sliding contact lines of electrified railways and rail transit lines; inner conductor materials of coaxial cables for cable TV subscriber lines and household lines; inner conductors of computer LAN, access network cables, and outdoor cables.

2. Application fields of hard copper stranded wire and soft copper stranded wire:

(1) Hard copper stranded wire: Hard copper stranded wire is often used in places that need to conduct electricity and require relatively high tension, such as distribution lines and buildings due to its strong tensile strength, low resistance and good electrical conductivity. Conductors, as well as cables for power transmission.

(2) Soft copper stranded wire: The most common one we see is household electrical appliance wire. It is also suitable for electrical machinery as a conductor for power cables and communication equipment. Soft copper stranded wire specifications include 15-7Φ5, 12-7Φ5, 9-7Φ5, etc. Taking 15-7Φ5 as an example, 5 represents a steel wire with a nominal diameter of 5.0mm, 7Φ5 represents 7 such steel wires forming a steel strand, and 15 means that 15 such steel strands form a bundle of steel bars. The general meaning is "a bundle of steel bars composed of 15 7-wire (total diameter 5mm, each wire diameter is about 1.7mm) steel strands".

3. Application fields of insulated copper stranded wires: There is a ring of insulating glue or plastic outside the copper stranded wires. Making such copper stranded wire mainly takes advantage of the high tensile strength of copper stranded wire, which can be used for special locks, brake lines on bicycles, battery cars, and motorcycles. It can also be used as a rope for drying clothes, etc.

1. First: look at the appearance of the copper stranded wire. When purchasing copper stranded wires, you need to start by observing the appearance. Generally, the appearance of good copper stranded wires is relatively bright, with obvious damage and scratches, and no obvious discoloration caused by oxidation reaction. The color on the outside is relatively uniform, with black spots and cracks at even and regular intervals. Meeting the above standards is a good choice for copper stranded wire.

2. Secondly: Look at the specifications and models of copper stranded wires. The selection of copper stranded wire requires observing the size and specifications of the wire. Generally, the drawing of copper stranded wire must be within the specified range and cannot exceed the process standards, otherwise it will be regarded as invalid stranded wire. The single wires that make up the twisted wire must be uniform and neat and comply with process rules.

3. Again: look at the structure and composition of copper stranded wires. When purchasing copper stranded wires, you must also observe the distribution and composition of the stranded wires to see if there are short wires, missing wires, loose strands, or overlapped strands. Generally, these can be observed with the naked eye, and we need to carefully observe and inspect them. The quality of copper stranded wire cannot be selected to produce unqualified products for the production of wires and cables, which will cause serious safety accidents.

4. Finally: look at the copper stranded wire welding process. When purchasing copper stranded wires, you should also pay attention to whether the welding process is reliable, whether the welded interface parts are neat, and whether there are any uneven lines. The welding interface should be neatly maintained, smoothed and rounded, and should not be thorny. The diameter of the welding head should generally not exceed 0.2 mm; the welding of two adjacent copper strands should be kept at a certain distance and evenly spaced.