experimental design. Drawn cups were sectioned at the middle and are shown in Fig.2. The punch stem diameter, the depth of drawing and the blank diameter were selected according to the benchmark specification given in Numisheet 2002[10].
experimental design. Drawn cups were sectioned at the middle and are shown in Fig.2. The punch stem diameter, the depth of drawing and the blank diameter were selected according to the benchmark specification given in Numisheet 2002[10].<br>