Forming tool for hydromechanically deep-drawing workpieces from sheet metal blanks

A forming tool ( 1 ) for hydromechanically deep-drawing workpieces from sheet metal blanks ( 2 ), the tool comprising a water tank ( 3 ), which acts as a lower tool and can be filled with a liquid active medium ( 8 ), thus forming the drawing die. The tool is also provided with a drawing ring ( 10 ), which is located in the upper section of the water tank ( 3 ) and is sealed against a volume of the active medium lying below. The boundary of the ring aperture ( 11 ) of the drawing ring ( 10 ) forms a drawing edge for the workpiece ( 2 ). The forming tool also comprises a drawing punch ( 9 ), which can be displaced with the sheet metal blank ( 2 ) interposed, through the ring aperture ( 11 ) of the drawing ring ( 10 ) into the section containing the active medium ( 8 ), whereby the sheet metal blank is pressed onto the drawing punch ( 9 ) using a reaction pressure as the application pressure, by means of a targeted displacement of the active medium ( 8 ). According to the invention, a water tank insert ( 14 ), which can be filled with active medium ( 8 ) to leave free the remaining water tank volume, can be positioned in the water tank ( 3 ), whereby the ring section of the drawing ring ( 10 ) lies tightly on the upper edge of the lateral walls ( 15, 16, 19, 20 ) of the insert.     «

A forming tool ( 1 ) for hydromechanically deep-drawing workpieces from sheet metal blanks ( 2 ), the tool comprising a water tank ( 3 ), which acts as a lower tool and can be filled with a liquid active medium ( 8 ), thus forming the drawing die. The tool is also provided with a drawing ring ( 10 ), which is located in the upper section of the water tank ( 3 ) and is sealed against a volume of the active medium lying below. The boundary of the ring aperture ( 11 ) of the drawing ring ( 10 ) for...     »