Block and finish

The forgingThe process of working metal to a desired shape by impact or pressure in hammers, forging machines (upsetters), presses, rolls, and related forming equipment. operation in which the part to be forged is blocked and finished in one heatAmount of forging stock placed in a batch-type furnace at one time. through the use of a dieThe machined recess in a die that gives the forging its shape. having both a blockThe forging operation in which metal is progressively formed to general desired shape and contour by means of an impression die (used when only one block operation is scheduled). impressionA cavity, or series of cavities (multiple), machined into a forging die to produce a desired configuration in the workpiece during forging. and a finish impressionThe die impression that imparts the final shape to a forged part. in the same dieThe machined recess in a die that gives the forging its shape.. This also covers the case where two tools mounted in the same machine are used, as in the case of aircraft pistons. Only one heatAmount of forging stock placed in a batch-type furnace at one time. is involved for both operations.