Patent ID: 9279167
Filing Date: 2016-03-08
CPC Classification: B21D,C21D

Claim Text:
1. A method of forming an article from a metal alloy sheet material, the method comprising: selectively hardening only a first localized area of the metal alloy sheet material without hardening a second localized area of the metal alloy sheet material, wherein the second localized area adjoins the first localized area, to thereby form a blank having; stamping the blank to thereby form a preform having a pre-protrusion, wherein the pre-protrusion is formed from both the hardened region and the non-hardened region and has: annealing the preform to thereby form a workpiece; and stamping the workpiece to elongate both the apex portion and the wall portion to increase the first height along the longitudinal axis, substantially equalize the first thickness and the second thickness, and thereby form the article.