Die angle and friction coefficient influence on residual stresses generated in wire drawing in bars of AISI 1045 steel

Authors

  • Carla A.T. Soares Universidade Federal do Rio Grande do Sul
  • Juliana Zottis Universidade Federal do Rio Grande do Sul
  • Tomaz F. de Souza Universidade Federal do Rio Grande do Sul
  • Lorenzi M. de Freitas Universidade Federal do Rio Grande do Sul
  • Tiago Colombo Universidade Federal do Rio Grande do Sul
  • Alexandre da Silva Rocha Universidade Federal do Rio Grande do Sul

DOI:

https://doi.org/10.4013/ete.2013.92.01

Abstract

Wire Drawing is one of the most widely used metal forming processes in the manufacture of round steel bars and, of all, this process allows a high dimensional accuracy to the parts. To improve this process, it is necessary to know all the parameters and to identify their influence in the quality of the manufactured product. This study aims to evaluate the influence of friction and the die angle, by numerical simulation, in the residual stresses and distortions generated after heat treatment. Numerical simulations of the drawing process of round bars of AISI 1045 steel were carried out for a given diameter reduction aiming to evaluate the residual stresses in the center and on the surface of the bars. The simulations were performed considering an elastoplastic material from the Simufact.Forming- GP® database software, in which the die angle and the friction coefficient between the tool and the bars were varied. The validity of the simulations was evaluated by comparing the forces taken from simulation and the forces calculated by empirical equations found in the literature. The simulation results showed greater influence of friction and of the die angle in the residual stresses on the surface of the bar. In the center, the influence in the residual stresses is higher for small die angles. With the analysis of the comparison between the forces it may be assumed that the model has been reproduced correctly and that it can predict the force values of the process. Also, there was a greater influence of the die angle relative to the friction coefficient in the emergence of residual stresses.

Key words: wire drawing, friction, die angle.

Author Biographies

Carla A.T. Soares, Universidade Federal do Rio Grande do Sul

Processos de fabricação - área de conformação mecânica com concentração no processo de trefilação de barras

Juliana Zottis, Universidade Federal do Rio Grande do Sul

Processos de fabricação - área de conformação mecânica com concentração no processo de trefilação de barras

Downloads

Published

2013-10-25

Issue

Vol. 9 No. 2 (2013): jul-dec

Section

Article

License

I grant the journal Estudos Tecnológicos the first publication of my article, licensed under Creative Commons Attribution license (which allows sharing of work, recognition of authorship and initial publication in this journal).

I confirm that my article is not being submitted to another publication and has not been published in its entirely on another journal. I take full responsibility for its originality and I will also claim responsibility for charges from claims by third parties concerning the authorship of the article.

I also agree that the manuscript will be submitted according to the journal’s publication rules described above.