Analytical expressions are derived for the required front pull for wire drawing, as well as the back push for extrusion. The effect of each of the process variables on these forces is presented graphically. The process variables are: the cone’s semiangle (α) initial (Ri) and final (Rf) wire radius, material yield limit (σ0) at uniaxial load, back pull (σxb) and front pull (σxf), coefficient of friction (μ) or shear factor (m), die land (L), exit velocity (vf), and entrance velocity (vi). The power balance is set for these powers: (1) Internal power of deformation of the wire, (2) power involved with the back force on the wire, (3) power involved with the front force on the wire, (4) power losses due to friction between the wire and the die.
Analysis of Wire Drawing and Extrusion Through Conical Dies of Small Cone Angle
Systems & Devices Section, Applied Science Department, Ford Motor Company, Dearborn, Mich.
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Avitzur, B. (February 1, 1963). "Analysis of Wire Drawing and Extrusion Through Conical Dies of Small Cone Angle." ASME. J. Eng. Ind. February 1963; 85(1): 89–95. https://doi.org/10.1115/1.3667601
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