ZZC
The application of wire drawing mold is becoming more and more common.During the operation process, the appropriate operation method is selected.There are more and more advantages in the use process.For better application, we need to understand the stretching principle of the following drawing mold.
Drawing mold refers to a pressure treatment method where the wire billet is plastic deformed through the mold hole, thus reducing the section and increasing the length.The stretched wire has better sizes, smooth surfaces, and various cross-sectional shapes.It can stretch wires of large lengths and various diameters.Mainly cold processing, simple pulling process, complete mold equipment, high production efficiency.The tensile energy consumption is relatively large and the deformation is limited by some ways.The stretch is due to the scale of the pressure treatment.Except for a small amount of dust produced during stretching, its volume does not change much, so the metal volume before and after stretching is basically the same.
The reason that affects the drawing mold is that the tension of copper wire is greater than that of aluminum wire, and the aluminum wire is easy to break. Therefore, a large safety factor should be used when pulling the aluminum wire.The tensile strength of raw materials has many factors, such as the chemical composition of raw materials, pressure rolling process, etc.The higher the tensile strength, the greater the tensile force.The greater the deformation degree, the longer the length of the deformation part of the drawing mold hole, thus increasing the positive pressure, friction force and pulling force of the mold hole on the line.
The greater the friction coefficient, the greater the tension.The friction coefficient is determined by the material smoothness of the drawing mold and the composition and quantity of the lubricating fluid.Dimension and shape of the work area and the die hole size area.The larger the upper slurry area, the greater the tension.Improper placement of drawing molds or tilt tilt will also increase tension.This also makes the line diameter and surface quality substandard.The wire is not straight, and the wire will shake during the stretching process of the drawing mold, so the resistance of the wire will increase the tension.
Methods to improve the quality of drawing mold.
