A General Consideration of Blank Holding in Deep Drawing of Sheet Metals

Abstract

From the theory on wrinkling of deep drawing using flat die already stated, the author found it possible to describe a general consideration on blank holding by the use of a rigid pressure plate. And the mechanism of formation of wrinkles was considered as following three cases ; i) The special proposed can of blank holding by the use of spring, ii) The blank holding fixed with a clearance larger than the thickness of blank between die and pressure plate, iii) The case of blank holding by the variable pressure during deep drawing process.