Long cartridge case

Abstract

A method of forming a closed end metal tube comprising cutting a blank from a solid round metal wire, backward extruding an axial hole in the blank to produce a hollow sidewall with a thickness, and reducing the sidewall thickness by using one or more Modified Hooker extrusions.

What is claimed is: 
     
         1 . A method of forming a closed end metal tube comprising cutting a blank from a solid round metal wire, backward extruding an axial hole in the blank to produce a hollow sidewall with a thickness, and reducing the sidewall thickness by using a Modified Hooker extrusion. 
     
     
         2 . A method as set forth in  claim 1 , wherein during the Modified Hooker extrusion, the outer diameter of the sidewall is confined. 
     
     
         3 . A method as set forth in  claim 1 , wherein a succession of Modified Hooker extrusions are performed on the sidewall. 
     
     
         4 . A method as set forth in  claim 1 , wherein the forming part is finish drawn to the final sidewall thickness of the desired part. 
     
     
         5 . A method as set forth in  claim 4 , wherein the method is performed on a single forming machine.