Research on amplitude variation during sheet blanking based on servo press

Three degrees of freedom (TDOF) vibration system during sheet blanking based on servo press is established, and the amplitude vibration of the body, slider and base of the servo press is simulated by the software Matlab/Simulink. The influence of the blanking speed and the initiation fracture position of blank on the maximum amplitude of slider are analyzed in detail. The results show that with the decreasing of the blanking speed, the trend of the maximum amplitude of slider decreases. The amplitude of slider decreases effectively if the position of the initiation fracture of blank is at the wave crest of the free vibration. To reduce the vibration and improve the productivity, a high speed adopts when the slider moves downward, and a slow speed adopts during stamping by utilizing the controllability of the slider stroke of servo press.