The research of the main factors, which occur in the deep-drawing process, on the size accuracy of pieces

Abstract

This papers presents the extent to which different parameters of the drawing process influences (the friction coefficient μ, the radius of punch rp, the drawing ratio m, the thin ratio my, the piece' s height h, the tensile strength Rm) both the thickness of a little cylindrical drawing piece and the optimizing ratio. The interest is turned to the variation thickness in the radius region wall-base, because here exists the danger of appearance of breaks. This study is made with the aid of Taguchi method using the quality of loss function, which supposes the establishing of a minimal level and a maximum level for the factors previously mentioned, the determination of experimentation matrix and the attainment of the degree of influence of each factor on the output values. Consequently, a little variation of the thickness of the piece in the longitudinal section, respectively a high optimizing ratio is checked for the maximum value of drawing ratio, the minimum value of the depth of the piece and the low value of the radius of the punch.