Flow behavior dependence of rod shearing phenomena of various materials in automatic multi-stage cold forging

Abstract

Strain hardening, elongation, and shearing speed effects of flow behaviors on coil-rod shearing during automatic multi-stage cold forging (AMSCF) are experimentally investigated. AMSCF machines and an experimental apparatus with a universal testing machine are utilized. Various coil materials are tested, including A6061-T6, SWCH10A, SCM435, and SCM415. The former is used to investigate the elongation and shearing speed effects on the sheared surface features. The latter is used to reveal the dependence of shearing phenomena on strain hardening and elongation. The new findings show the strong dependence of coil-rod shearing phenomena and surface features on flow behaviors and shearing speed. They will lead the engineers to the optimized shearing process design. © 2023, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature.