Abstract
The study of die geometry is vital in determining the surface and mechanical properties of drawn wires, and consequently, their application. In this work, annealed electrolytic copper wire (ETP), with 0.5 mm original diameter was reduced by 19% in dies with 2β = 10º and 18º and Hc = 35 and 50%. The best experimental results were then studied by the Finite Element Method to simulate residual stress distribution. The experimental results show that the friction coefficient decreases as the wire drawing speed increases, and that low 2β and Hc values bring about the most favorable wiredrawing conditions. The simulation shows a variation in the axial and radial tensions, both for the compression and traction stresses on all regions during the wire drawing process. In conclusion, the influence of the internal die geometry on the drawn wire is clarified.
Highlights
The drawing process is used for the production of bars, wires and tubes, in which good quality surface and mechanical properties of the final products comply with specifications
It is necessary to understand the behavior of the material during the process, which depends on several factors, such as die geometry, initial material properties, lubricant, drawing speed and the interaction of all these factors to reach the ideal process condition
A forecast of the wire mechanical properties is obtained through the Finite Element Method (FEM) numerical analysis of the variation of wire stress curves during the wiredrawing process
Summary
The drawing process is used for the production of bars, wires and tubes, in which good quality surface and mechanical properties of the final products comply with specifications. It is necessary to understand the behavior of the material during the process, which depends on several factors, such as die geometry, initial material properties, lubricant, drawing speed and the interaction of all these factors to reach the ideal process condition. A forecast of the wire mechanical properties is obtained through the Finite Element Method (FEM) numerical analysis of the variation of wire stress curves during the wiredrawing process. The main advantage of the FEM is the capability of obtaining detailed information about the deformation mechanisms such as velocity, shapes, strains, stress curves, temperatures, or distribution of contact pressure. Some disadvantages are the necessity of intense familiarity with the software program used and the investment in both: hardware and software[1]
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