A The process of working metal to a desired shape by impact or pressure in hammers, forging machines (upsetters), presses, rolls, and related forming equipment. made in closed or A cavity, or series of cavities (multiple), machined into a forging die to produce a desired configuration in the workpiece during forging. The metal blocks into which forging impressions are machined and from which forgings are produced. under a drop or A type of drop hammer where the ram is raised for each stroke by a double-action steam cylinder and the energy delivered to the workpiece is supplied by the velocity and weight of the ram and attached upper die driven downward by steam pressure. Energy delivered during each stroke may be varied.... More.