Design and development of a novel load-control dieless rod drawing system

Tiernan, Peter; Carolan, Ronan; Twohig, E.; Tofail, Syed A. M.

doi:10.1016/j.cirpj.2011.03.001

Cited by 19 publications

(4 citation statements)

References 6 publications

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“…To the best of our knowledge, this process was proposed for the first time by Weiss and Kot for wire production [ 1 ]. Currently, this process is laboratory tested for the manufacture of pipes [ 2 ], bars [ 3 ], and wires [ 4 ]. The lack of dies and lubricants enables significant cost reduction [ 5 ] and eliminates the influence of friction on the deformation process [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Surface Roughness of Thin Brass Wire Processed by Different Dieless Drawing Processes

et al. 2021

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This paper examines the surface roughness of a thin brass wire (140–200 microns in diameter) after two dieless drawing (DD) processes, i.e., conventional dieless drawing (CDD) and incremental dieless drawing (IDD). In incremental dieless drawing, small increments in deformation were applied in several passes. It has been proven that the IDD process not only has a greater efficiency but also enables obtaining a wire with significantly lower surface roughness. The explanation for these effects is based on the results of the numerical modeling of both compared processes. The developed numerical model takes into consideration the initial roughness of the wire surface, shape and dimensions of grains, and their diversified mechanical properties. Nanoindentation measurements, microstructure, and plastometric studies allowed us to find the effective flow stress distribution in the grains. The IDD process was found to be much more stable and develop a much more uniform distribution of grain strain than the CDD process. More homogeneous deformation results in surface roughness reduction. Approximately 25–30% reduction in surface roughness of the wire produced by the IDD process was predicted by simulations and confirmed experimentally.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Surface Roughness of Thin Brass Wire Processed by Different Dieless Drawing Processes

et al. 2021

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“…Subsequently, the deformed workpiece is cooled to prevent further deformation to achieve products with constant or different cross-sections [7]. Tiernan et al [8] concluded that dieless drawing has many advantages such as large area reduction in a single pass, small drawing force, and no requirement of a lubricant and drawing die.…”

Section: Introductionmentioning

confidence: 99%

Study of Deformation Stability during Semi-Dieless Drawing of Ti-6Al-4V Alloy Wire

Wang

Liu

2019

Materials

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A semi-dieless drawing technology has the advantages of producing a large deformation in a single pass and achieving high-precision dimensions of the finished products. However, instabilities can easily occur in a technique with a large amount of deformation, resulting in its failure. Herein, the deformation behavior of a wire during semi-dieless drawing is studied by finite element simulations. The instability mechanism of the semi-dieless drawing is proposed and validated by experiments. The experiments are conducted under the following conditions: a heating temperature of 950 °C; a distance between the die and heating coil of 20 mm; a feeding speed of 0.25 mm/s; a drawing speed range of 0.38–0.53 mm/s, and a die diameter range of 1.8–2.4 mm. The results show that by increasing the drawing speed or decreasing die diameter, the diameter fluctuation of the dieless drawn wire increases, and the semi-dieless drawing process easily becomes unstable. The diameter of the entering wire shows a fluctuating increasing trend owing to the variation in the drawing speed, which results in the instability during the semi-dieless drawing. The validity of the finite element model is verified by comparing the numerically predicted value and experimentally measured value of the drawn wire diameter.

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“…A stability design for a continuous dieless drawing system has been proposed. Tiernan et al [15] carried out dieless drawing experiments on AISI O1 steel wires. The experimental results showed that when the speed ratio is greater than 0.5, a large reduction and uniform diameter could be obtained.…”

Section: Introductionmentioning

confidence: 99%

Formability Analysis and Oxidation Layer Effects in Dieless Drawing of Stainless Steel Wires

Hwang

Liu

2019

Metals

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In this study, dieless drawing experiments of stainless steel SUS304 wires of 1 mm in diameter were carried out using a self-developed dieless drawing machine. In order to prevent oxidation, argon gas was applied to a self-designed chamber during dieless drawing processes. The effects of the forming temperature and the oxide layer on the mechanical properties of the drawn SUS304 stainless wires obtained by tensile tests are discussed in this paper. A finite element model considering the high frequency induction heating mode in the finite element software DEFORM2D was developed to conduct the heat transfer analysis and the formability analysis of the drawn products in dieless drawing of stainless steel wires. The effects of the drawing speed and forming temperature on the maximal reachable area reductions are discussed. Through the comparisons of the maximal reachable area reduction between the finite element simulations and experiments, the finite element modelling for dieless drawing processes was validated.

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Design and development of a novel load-control dieless rod drawing system

Cited by 19 publications

References 6 publications

Experimental and Numerical Study of Surface Roughness of Thin Brass Wire Processed by Different Dieless Drawing Processes

Experimental and Numerical Study of Surface Roughness of Thin Brass Wire Processed by Different Dieless Drawing Processes

Study of Deformation Stability during Semi-Dieless Drawing of Ti-6Al-4V Alloy Wire

Formability Analysis and Oxidation Layer Effects in Dieless Drawing of Stainless Steel Wires

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