The Study of Deep Drawing of Brass-steel Laminated Sheet Composite Using Taguchi Method

Deep drawing process is one of the most applicable methods in producing industrial parts. In this process, the initial blank deforms to final product using a rigid punch and die. In this investigation, the effect of deep drawing process parameters of brass/steel laminated sheet composites on required forming force has been investigated. The process simulated using finite element method (FEM) and then validated by using experimental results. Afterward, the effect of process parameters including friction coefficient between punch and sheet (punch friction), friction coefficient between die and sheet (die friction), blank holder force and the initial blank diameter all in three different levels investigated using design of experiments (DOE) by Taguchi method. Based on four selected parameters in three levels, experiments performed by Taguchi L9 orthogonal array and then the maximum punch force of each experiment was obtained using validated FE model. Signal to noise (S/N) analysis demonstrated that the die friction is the most important parameter in deep drawing of brass/steel laminated sheet that by its reduction, the maximum punch force decreases. Also analysis of variance (ANOVA) results illustrated that the die friction and initial blank diameter are involved 53.1% and 43.4% of contribution on maximum punch force, respectively.