Next Article in Journal
A Novel Cyclic-Quenching-ART for Stabilizing Austenite in Nb–Mo Micro-Alloyed Medium-Mn Steel
Previous Article in Journal
Electrochemical Impedance Analysis on Cryogenically Treated Dissimilar Metal Welding of 316L Stainless Steel and Monel 400 Alloy Using GTAW
Open AccessArticle

Influences of Different Die Bearing Geometries on the Wire-Drawing Process

1
Engineering School of Lorena, University of São Paulo-USP, 12602-810 Lorena, Brazil
2
Institute of Mechanical Engineering, Federal University of Itajubá-UNIFEI, 37500-903 Itajubá, Brazil
3
Guaratinguetá School of Engineering, Campus de Guaratinguetá, São Paulo State University-UNESP, 12516-410 Guaratinguetá, Brazil
*
Author to whom correspondence should be addressed.
Metals 2019, 9(10), 1089; https://doi.org/10.3390/met9101089
Received: 2 September 2019 / Revised: 2 October 2019 / Accepted: 8 October 2019 / Published: 10 October 2019
Metalworking is an essential process for the manufacture of machinery and equipment components. The design of the die geometry is an essential aspect of metalworking, and directly affects the resultant product’s quality and cost. As a matter of fact, a comprehensive understanding of the die bearing geometry plays a vital role in the die design process. For the specific case of wire drawing, however, few efforts have been dedicated to the study of the geometry of the bearing zone. In this regard, the present paper involves an attempt to investigate the effects of different geometries of the die bearing. For different forms of reduction as well as bearing zones, measurements are carried out for the wire-drawing process. Subsequently, by extracting the friction coefficients from the electrolytic tough pitch copper wire in cold-drawn essays, the numerical simulations are also implemented. We present the results on both the superficial and center radial tensions obtained by finite element methods. It is observed that the reduction of the friction coefficient leads to an increase in radial stress, while for a given friction coefficient, the substitution of the C-type die by the R-type one results in a decrease in the superficial radial stress of up to 93.27%, but an increase at the center of the material. Moreover, the die angle is found to play a less significant role in the resultant center radial stress, but it significantly affects the superficial radial stress. Lastly, R-type dies result in smaller superficial radial stress, with a change of up to 34.48%, but a slightly larger center radial stress up to 6.55% for different die angles. The implications of the present findings are discussed. View Full-Text
Keywords: wire drawing; finite element method; drawing die; die geometry; radial stress; friction wire drawing; finite element method; drawing die; die geometry; radial stress; friction
Show Figures

Figure 1

MDPI and ACS Style

Martinez, G.A.S.; Santos, E.F.; Kabayama, L.K.; Guidi, E.S.; Silva, F.A. Influences of Different Die Bearing Geometries on the Wire-Drawing Process. Metals 2019, 9, 1089.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop