AA1100-O cylindrical cup-drawing using 3D servo-press

Abstract

Abstract In this paper, the flexibility of a 3D servo-press is used as the inspiration to numerically demonstrate the ability to improve the final product, in this case reduced equivalent plastic strain, increased forming depth, and reduced punch force, during cylindrical cup-drawing. The material investigated is AA1100-O which exhibits significant anisotropy, i.e., r-values of 0.45 to 1.2 in 45 degree and transverse direction to rolling, respectively. This leads to earing during cup-drawing, which is used to validate numerical simulation efforts. A unique 3D servo-press at the Institute for Production Engineering and Forming Machines at the Technische Universität Darmstadt allows for tilting and orbital motion of the blank holder and with this a variation of the blank-holding force during the punch progression. Numerical simulations are used to demonstrate improvements with respect to equivalent plastic strain and forming depth.