Nonfill (underfill)

ForgingThe process of working metal to a desired shape by impact or pressure in hammers, forging machines (upsetters), presses, rolls, and related forming equipment. condition that occurs when the finish(1) The forging operation in which the part is forged into its final shape in the finish die. If only one finish operation is scheduled to be performed in the finish die, this operation will be identified simply as finish; first, second, or third finish designations are so termed when one or more finish operations are to be performed in the same finish die. (2) The surface condition of a forging after machining. (3) The material machined off the surface of a forging to produce the finish machine component.... More die impressionThe portion of the die surface that shapes the forging. is not completely filled with metal. Some causes are: improper distribution of metal in preforming operations such as fulleringReducing the cross section of a forging between ends of stock., edgingThe forging operation of working a bar between contoured dies while turning it 90° between blows to produce a varying rectangular cross section., and blocking; excessive removal of material by chipping defects prior to finish forgingSee Conventional Forging.; improper lubrication of dieThe machined recess in a die that gives the forging its shape. impressionA cavity, or series of cavities (multiple), machined into a forging die to produce a desired configuration in the workpiece during forging.; low forging pressure; rough or uneven dieThe machined recess in a die that gives the forging its shape. finish; inadequate hammerA machine that applies a sharp blow to the work area through the fall of a ram onto an anvil. The ram can be driven by gravity or power. See also Gravity Hammer and Power-Driven Hammer. or press capacityThe rated force a press is designed to exert at a predetermined distance above the bottom of the stroke of the ram..