Some common sense of wire and cable, wire and cable professional manufacturers for you
Release time： 2022-07-26 17:22
Wire and cable manufacturers consider that the wire products used for conveying power, transmitting information and realizing electromagnetic energy conversion are called wire and cable. Usually only metal conductor and insulating layer, light protective layer of insulating wire (such as cotton yarn braided layer, glass yarn braided layer, plastic, rubber, etc.) products), simple structure, small outside diameter, voltage and current is called wire. Products with complex structure and large cross-section, both conductors and insulation, sometimes have a tight inner protective layer to prevent water intrusion, or have a greater mechanical strength of the outer protective layer, known as cable.
Wire and cable manufacturers consider wire drawing process as a metal processing process. In metal pressure working. Under the action of external force, the metal is stressed through the mold, the cross-sectional area of the metal is compressed, and the shape and size of the required cross-sectional area are obtained, which is called the metal wire drawing process. The tool to change its shape and size is called a drawing die.
Wire and cable professional manufacturers believe that the characteristics of wire and cable:
1) The drawn wire has accurate size, smooth surface and diverse section shapes;
2) Large length and various diameters of wire can be drawn, with the same section shape throughout the length;
3) Mainly cold processing can improve the mechanical properties of products;
4) Drawing equipment and workpiece are relatively simple, high yield;
5) Disadvantages: single processing rate is low, tensile pass many, high energy consumption. Work hardening occurs, which reduces the plasticity and conductivity of the wire.
Wire and cable professional manufacturers believe that the conductivity of copper is second only to silver, the price is lower than silver, and has the advantages of good plasticity, easy hot and cold pressing processing, easy welding, moderate tensile strength, good corrosion resistance, not easy to melt. Aluminum has the advantages of low density (about 1/3.3 of copper), good electrical and thermal conductivity (ranked in the fourth place after silver, copper, gold), good corrosion resistance in the air, good plasticity, various forms of pressure processing.
Wire and cable professional manufacturers believe that stretching is the process of changing the cross-sectional area of the metal workpiece through the circular or special-shaped tensile die hole with a certain tension. When the workpiece is stretched through the die hole, its cross section is equivalent to the shape and size of the smallest cross section of the die hole, and its length increases proportionally with the decrease of the cross section area. The plastic deformation of wire through a certain die under a certain tension is a cold working deformation of decreasing cross section and increasing length, which is mainly achieved by gradually decreasing the diameter of several dies.
Wire and cable professional manufacturers believe that after cold working and plastic deformation, the metal is unstable due to internal grain breakage, lattice distortion and residual internal stress, and it has a tendency to spontaneously change to a stable state. But at room temperature, atoms are less diffusible and difficult to change. Thus, by heating the deformed metal, the kinetic energy of the atoms can be increased, causing it to change and return the metal to its pre-cold working level in the shortest possible time.