Abstract
In the multi-pass wire drawing process, the diameter of a wire is decreased by continuously passing it through progressively smaller drawing dies. Although the deformation depends on the process variables, in most wire drawing processes, the wire deformation is concentrated on the surface by its direct contact with the drawing dies, causing a nonlinear distribution of radial direction effective strain from the center to the surface. In this study, a new model for predicting this effective strain in two-pass drawn wire was derived based on the upper bound method, and a finite element analysis and drawing experiment were conducted to validate its effectiveness. The proposed model offers a promising approach to determining and thus controlling the strain in multi-pass drawn wire.
Highlights
The wire drawing process is one of the most common metal forming processes [1]
During the wire drawing process, as the wire passes through the drawing die, its length increases and its diameter decreases
The specimen surface was finely polished with 1.0 μm Al2O3 powder [22]
Summary
The wire drawing process is one of the most common metal forming processes [1]. Drawn wires are widely used in many fields, including in the automotive, construction, chemistry, electric or electronic, and shipbuilding industries. During the wire drawing process, as the wire passes through the drawing die, its length increases and its diameter decreases. The non-uniform deformation from center to surface can adversely affect the mechanical properties and straightness of drawn wire and is an important cause of residual stress [2,3]. The presence of tensile residual stress in drawn wire reduces its yield strength [4] and has deleterious effect on its fatigue and corrosion properties [5]. It is important to evaluate the distribution of strain in drawn wire
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