Analysis of residual stresses in wire drawing processes in monolithic dies

The article presents a model for simulating the wire drawing process, which allows calculating the stress-strain state of the wire during and after drawing using the finite element method. Verification of the developed simulation model showed high convergence of the obtained results with similar calculations performed by other researchers. During the analysis, the technological parameters of drawing were deter-mined, the influence of which on residual stresses in the wire is planned to be studied in subsequent works. In this paper, the influence of the working half-angle of the die on the axial, radial and tangential compo-nents of residual stresses is analyzed. The distribution of residual stresses over the wire cross-section is given. It was found that a decrease in the half-angle of the die from 8 to 4° leads to a decrease in axial stresses on the wire surface from 750 to 430 MPa, and tangential stresses from 400 to 320 MPa. Since the quality of the wire is mainly determined by the magnitude and sign of residual stresses on the surface of the wire, re-ducing the surface tensile stresses by reducing the half-angle of the die will have a positive effect on the op-erational properties of the wire. The ambiguity of the influence of technological parameters of drawing and especially their mutual effect on the sign and magnitude of residual stresses require a large number of nu-merical experiments. The availability of specialized programs for computer modeling and a high degree of reliability of the results obtained open up opportunities not only for calculating individual options of drawing modes, but also for conducting complex studies with the prospect of obtaining dependencies and models for predicting residual stresses after wire drawing.