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

Martínez, Gustavo Aristides Santana; Santos, Eduardo Ferro dos; Kabayama, Leonardo Kyo; Guidi, Erick Siqueira; Silva, Fernando de Azevedo

doi:10.3390/met9101089

Cited by 18 publications

(13 citation statements)

References 18 publications

(25 reference statements)

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“…The change of bearing zone length in the region III leads to the variations of both surface and centre stresses, indicated by the nodes 580 and 40 respectively. Vega et al [34], Martínez et al [35], and other authors [2,22,24] have shown that the die angle, friction coefficient, and bearing zone length significantly affect the stress during the drawing process. We note that the above findings are consistent with previous studies.…”

Section: (A)mentioning

confidence: 99%

Effect of Process Parameters in Copper-Wire Drawing

Martínez

Qian

Kabayama

et al. 2020

Metals

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The efforts to increase the operating speed of the wire drawing process play a crucial role regarding the industrial productivity. The problem is closely related to various features such as heat generation, material plastic deformation, as well as the friction at the wire/die interface. For instance, the introduction of specific lubricants at the interface between the die and the wire may efficiently reduce the friction or in another context, induce a difference in friction among different regimes, as for the case of hydrodynamic lubrication. The present study systematically explores various aspects concerning the drawing process of an electrolytic tough pitch copper wire. To be specific, the drawing speed, drawing force, die temperature, lubricant temperature, and stress distributions are analysed by using experimental as well as numerical approaches. The obtained results demonstrate how the drawing stress and temperature are affected by the variation of the friction coefficient, die geometry, and drawing speed. It is argued that such a study might help in optimizing the operational parameters of the wire drawing process, which further leads to the improvement of the lubrication conditions and product quality while minimizing the energy consumption during the process.

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Section: (A)mentioning

confidence: 99%

Effect of Process Parameters in Copper-Wire Drawing

Martínez

Qian

Kabayama

et al. 2020

Metals

Self Cite

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“…In this regard, the wires must have sufficient mechanical strength and withstand the effects of atmospheric phenomena and chemical impurities along with possessing good electrical conductivity. Therefore, in recent years, during the construction of power lines, much focus has been directed toward bimetallic materials formed by a combination of metals dissimilar in their layered structure [ 12 , 13 , 14 ]. The main quality indicators of bimetallic wire and rods are the combination of their strength and plastic properties.…”

Section: Introductionmentioning

confidence: 99%

Hardening of Bimetallic Wires from Secondary Materials Used in the Construction of Power Lines

et al. 2022

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Copper-sheathed steel wires combine the conductivity of copper and the traction resistance of steel, which makes a bimetallic wire an ideal material for the construction of power lines. Currently, there is a small number of studies devoted to the change in the microstructure of steel-copper wire during its strain. Since steel and copper have different mechanical properties, these metals at the interface can be deformed in different ways. Therefore, the present research is devoted to the study of ECAP-drawing process impacts on the properties of bimetallic steel-copper wire. During the conducted studies, the possibility and efficiency of using the combined strain technology for the formation of ultrafine grained structure and increased strength properties of steel-copper wire have been proved.

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“…Such simplification does not fully take into account the phenomena occurring in the material before entering the elastic–plastic deformation region inside of the drawing die, and the assumption that the material before entering the die reduction angle is stress-free is not true, as it is obvious that elastic–plastic deformations must be preceded by elastic deformations [ 24 ]. Among research works taking that into account, Martinez et al [ 25 , 26 ] investigated the influence of the wire drawing parameters throughout the process, as well as die geometry on generated heat, friction, and plastic deformations. They confirmed that as a result of the material flowing in the direction of the die axis, the stresses changed from compressive to tensile.…”

Section: Introductionmentioning

confidence: 99%

“…Similar observations have been made when the drawing angle has been changed. The authors of these two works [ 25 , 26 ] did not notice any influence of the die geometry on the axial deformations. Skołyszewski et al [ 5 ], in their research work, investigated the influence of back tension throughout the wire drawing process of steel on recorded stress values and noted that despite the very short length of the region of elastic deformations, its values exceeded several times the value of the metal unit pressure on the wall of the drawing die, which is an extremely dangerous phenomenon during the wire drawing process.…”

Section: Introductionmentioning

confidence: 99%

Shape Analysis of the Elastic Deformation Region throughout the Axi-Symmetric Wire Drawing Process of ETP Grade Copper

et al. 2021

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The wire drawing process is commonly perceived as one of the best studied metal forming processes in almost every aspect; however, when considering elastic deformation, researchers usually focus on the uniaxial tensile forces after the material exits the drawing die and not the elastic deformation region before entering the drawing die, even though it may have a significant impact on the strength parameters and the nature of metal flow inside the drawing die. The aim of this research is to theoretically and experimentally identify the deformation in the elastic region and to further link the shape of this region and the values of stress occurring in it with the geometrical parameters of the drawing process and assess its impact on its strength parameters. In order to achieve the assumed goals, numerical analyses using the finite element method and experimental research on the drawing process in laboratory conditions were carried out using Vickers hardness tests and resistance strain gauges measuring deformation in stationary and non-stationary conditions. The obtained results indicate that the shape and the extent of the region of elastic deformations generated in the material before the plastic deformation region during the drawing process depends on the applied deformation coefficient and stationarity of the process.

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

Cited by 18 publications

References 18 publications

Effect of Process Parameters in Copper-Wire Drawing

Effect of Process Parameters in Copper-Wire Drawing

Hardening of Bimetallic Wires from Secondary Materials Used in the Construction of Power Lines

Shape Analysis of the Elastic Deformation Region throughout the Axi-Symmetric Wire Drawing Process of ETP Grade Copper

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