The The process of working metal to a desired shape by impact or pressure in hammers, forging machines (upsetters), presses, rolls, and related forming equipment. The portion of the die surface that shapes the forging. which gives the forging its general shape, but omits any details that might restrict the metal flow; corners are well rounded. The primary purpose of the blocker is to enable the forming of shapes too complex to be finished after the preliminary operations; it also reduces The machined recess in a die that gives the forging its shape. wear in the finishing A cavity, or series of cavities (multiple), machined into a forging die to produce a desired configuration in the workpiece during forging..