Patent ID: 9375775
Filing Date: 2016-06-28
CPC Classification: B21D,Y10T

Claim Text:
1. A hydro-mechanical forming machine comprising: an upper tool including a punch that has a die surface, and a blank holder receiving the punch with the punch being moved reciprocally relative to the blank holder; a lower tool including a lower ring that has a blank receiving surface and that defines a first cavity into which a first volume of liquid is supplied, and a second cavity that may be separated from the first cavity defined by the lower ring inboard of the blank receiving surface and by the blank, as the blank is formed by the punch into the open die, wherein a second volume of fluid is supplied to the second cavity under pressure that supports the blank as the blank is formed into the open die; a bottom wall that is movable within the lower ring, wherein the first volume of liquid is contained within the lower ring and on the bottom wall, wherein a blank is formed against the liquid by the punch, and wherein the bottom wall is lowered within the lower ring as the punch forms the blank; and an electro-hydraulic discharge system disposed in the liquid contained in an electro-hydraulic forming chamber that is discharged after the punch draws the blank into the lower ring, wherein actuation of the electro-hydraulic discharge system forms the blank against the punch.