A comparative study of deep drawing with conventional, isostatic, and hydrostatic pressure

Deep drawing with radial fluid pressure - which also goes by the name "fluid pressure forming" - is a newly developing sheet metal forming process that has many advantages over the conventional deep drawing process: a significant application of the technique is its - indispensible - employment in the area of the forming of the so-called high strength difficult metals. A new tool set-up has been designed and developed so that it can be used on a double-action hydraulic press for investigating deep drawing process parameters in both hydrostatic and isostatic environments. In the present paper a comparative study has been made of the results of deep drawing with conventional, with isostatic and with hydrostatic pressure. Experiments which were performed on aluminium sheets provide better results and more efficient energy utilisation when using hydrostatic pressure than when using isostatic and conventional techniques. © 1982.