Parametric investigation of pulsating blank holder's effect in deep drawing process of rectangular Al 1050 Cup

The aim of this research is to investigate the effect of design parameters of pulsating blank holder force (PBHF) in deep drawing of an aluminum 1050 square cup in order to improve the drawing depth. Experimental tests and finite element simulations data are used to develop a second-order mathematical model to predict the drawing depth. Frequency and amplitude of the pulsating blank holder and velocity of the punch movement are considered as process variables. Individual and combined effects of these variables on the depth of drawing are investigated. The accuracy of the numerical model is verified by experimental work and statistical analysis. Optimum value of the process parameters is calculated with the aid of an empirical model. Results of this work show that frequency of the pulsation on PBHF is the most influential process parameter, and the interaction of the design variables is negligible.