“…The pressure on the flange is more uniform which makes it easiest to c hoose the parameters in simulat ion. The pressure in the die cavity can be controlled very freely and accurately, with the approximate liquid pressure as a function o f punch position, the parts can drawn without any scratches on the outside of the part and also obtained in good surface finish, surface quality, high dimensional accuracy and comp licated parts [12][13][14][15][16][17].In the hydro forming deep drawing process the pressurized flu id serves several purposes are supports the sheet metal fro m the start to the end of the forming process, thus yielding a better formed part, delays the onset of material failure and reduces the wrinkles formation. The advantages of hydraulic pressure forming deep drawing techniques, increased depth to diameter ratio 's and reduces thicknes s variations of the cups formed are notable.…”