Buster (preblocking impression)
A type of The portion of the die surface that shapes the forging. sometimes used to combine preliminary The process of working metal to a desired shape by impact or pressure in hammers, forging machines (upsetters), presses, rolls, and related forming equipment. operations such as The forging operation of working a bar between contoured dies while turning it 90° between blows to produce a varying rectangular cross section. and Reducing the cross section of a forging between ends of stock. with the blocking operation to eliminate blows.