Characterization of wire rolling and wire roll drawing using 2-roll, 3-roll and 4-roll mills

摘要

Three-dimensional deformation features of workpieces in wire rolling and wire roll drawing using 2-, 3- and 4-roll mills have been clarified using a general purpose FEM simulator for rolling processes named "CORMILL System". Various deformationcharacteristics of wires such as true reduction in area, elongation, width spread, average equivalent strain, roll separating force, drawing stress and rolling torque have been successfully simulated. These characteristics are formulated by means ofconsistent numerical case studies. Rolling using a 3-roll mill or 4-roll mill results in better elongation, width spread and ovality with a relatively smaller roll separating force than that obtained using a 2-roll mill. The maximum reduction in area in3-roll rolling/roll drawing is much more than that obtained using a 2-roll mill or a 4-roll mill. The general deformation characteristics resulting from roll drawing are quite similar to those resulting from rolling, but those resulting from roll drawinghave smaller width spread and ovality than those resulting from rolling.