Straighten, coin

A combination coining(1) A post-forging process—on hot or cold parts—used to attain closer tolerances or improved surfaces. (2) A closed-die squeezing operation in which all surfaces of a workpiece are confined or restrained, resulting in a well-defined imprint of the die on the work.... More and straightening operation performed in special cavityThe machined recess in a die that gives the forging its shape. diesThe metal blocks into which forging impressions are machined and from which forgings are produced. designed to impart a specific amount of working in specified areas of 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. to relieve stresses set up during heat treatmentA sequence of controlled heating and cooling operations applied to a solid metal to impart desired properties..