사각 딥드로잉에서 플랜지 주름이 벽 파단에 미치는 영향

Effect of Flange wrinkling on wall break of rectangular cup drawing

In order to investigate the effect of flange wrinkling on the wall break of a deep drawn rectangular cup, experiments and simulation were done. The effect of the wrinkling height on drawing force and wall break for a moving blank holder system with spacer were studied by setting a fixed clearance between the drawing die and the blank holder. Simulation and experimental results showed that wall break could be provoked by the flange wrinkling. As the wrinkling height increased, the punch force grew. The maximum punch force was obtained at its final stage of stroke.