Patent ID: 9689420
Date: 2017-06-27
CPC Classifications: B21D,B21K,F16B

Claim:
1. A METHOD FOR MANUFACTURING A NUT BY THE PROGRESSIVE PRESS FORGING OF A LAMINAR METAL SHEET AND RESULTING NUT, of the type of nut incorporating a supporting base and an external hexagonal profile for the application of a tightening tool, wherein said method comprises the steps of: starting from a laminar metal sheet of suitable material and thickness, producing a piece with a supporting washer and an emergent hexagonal part by press forging, said part being of uniform thickness; and creating a threaded interior through progressive press forging in the interior of said hexagonal emergent part, displacing material laterally from the central zones of said faces into the zones of the edges; applying heat treatment to the piece obtained, treatment intended to provide the piece with greater strength.