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AA1070 알루미늄 합금 사각 케이스의 충격압출 공정에서 마찰과 금형간 간격이 미치는 영향
조민기(M. K. Jo),안은솔(E. An),박인욱(I. W. Park),송익성(I. S. Song),김화영(H. Y. Kim),김대용(D. Kim),문영훈(Y. H. Moon),김지훈(J. H. Kim) 한국소성가공학회 2015 한국소성가공학회 학술대회 논문집 Vol.2015 No.5
Impact extrusion processes are economical and productive processes that can replace multistage deep drawing processes. It can be used to manufacture cups with a complex section as well as circular or rectangular cups. For impact extrusion processes, commercial purity aluminum(AA1070) is studied to anticipate flow stress at high temperature and strain rate by using Hansel-Spittel rheology. In this work, the impact extrusion process was analyzed numerically to study the effects of process parameters such as friction, clearance between punch and die, thickness of billet and curvature radius of die, etc. Three-dimensional finite element analysis was used to predict z-axis load & stress of die, and shapes of deformed rectangular aluminum alloys.