Determination of Optimal Conditions for Gas Forming of Aluminum Sheets

• DOI: 10.1016/j.proeng.2014.10.134
• Publication Date: 2014-10-15T13:52:30Z
• Authors: Sergey A. Aksenov; Eugene N. Chumach...; Aleksey V. Kolesn...; Sergey A. Osipov
• Keywords: Flow stress; Least-squares function approximation; Basis (linear algebra)

This study proposes a method for determining the material constitutive equations and optimal forming conditions on basis of free bulging tests. The blow-forming tests were carried out at temperature 420 °C using aluminum alloy (AMg-6) sheets 1 mm thickness. Each test was performed constant pressure. For each fixed value pressure, series experiments with different times to obtain evolutions dome height H thickness s. These data processed by proposed flow stress dependence effective strain rate. obtained least squares minimization deviations between experimental variations s ones predicted simplified engineering model. On data, optimum rate AMg-6 processing determined as one corresponding maximum sensitivity.