Infulence of Process Parameters on Deep Drawing Process

Deep drawing is a most important technique for forming sheet metal parts. It is widely used for mass production of cup shapes in automobile, aerospace and packaging industries. Defectives due to wrinkles and excessive roughness alter the product geometry from the designed one, causing difficulties in finishing of sheet products. These defects directly lead to increase of the manufacturing cost. Surface roughness and uniform Wall thickness is the major challenge in the deep drawing process. To avoid the expensive and difficult experiments modern manufacturing is based on the analysis of forming processing numeral atmosphere before the actual production set-up. Wrinkling is an undesirable phenomenon in deep drawing. It occurs at flange as well as the sidewalls of a deep drawn cup. The main reason for wrinkles is inadequate blank holding force. However excessive blank holding force results in fracture. The aim of this work is to arrive at optimum Blank holding force in order to produce wrinkle free products.