Numerical and Experimental Investigation the Effect of Pulsating Blankholder on Formability of Aluminum Alloy in Deep Drawing Process

In this study, the effect of pulsating blankholder by using a new system for improving the formability of aluminum alloy has been investigated. By means of this system, in every pulsating cycle, at first the blankholder force has been removed, metal has been flowed into die and then to prevent excessive metal flow and wrinkles, the blankholder force by springs has been used.Deep drawing of cylindrical cup has been simulated by using ABAQUS6.7 software. Cup depth, tearing and thickness distribution of the experimental and numerical results have been compared. The results show that cup depth by using the pulsating blankholder system and select a proper frequence and gap, can be increased and thickness distribution can be improved. It has further been observed that simulation and experimental results are in good agreement together.