The Influence of Punch Motion on the Equal-Cross-Section Lateral Extrusion

摘要

Equal-cross-section lateral extrusion is a relatively novel method for producing ultrafine-grained materials, with no net change in the billet's shape. In this study, the rigid-plastic three-dimensional finite element simulation technique was utilized to investigate the processes, which punches varied with motion types. Namely, the influence of different punch motions, such as axial pressing, torsion pressing and orbital pressing, on the extruded load, the effective strain of formed billet and the stress distributed at dies in this process were examined accordingly. Result indicated that the extruded loads, the effective strain in deformed billets and the effective stress in punches were the highest in the ECSLA which punch subjected axial pressing, while the torsion pressing was the lowest.