Method Of Cold Forming Sheets

Author:  Borger, James C.
Source:  US Patent 2,701,408
Doc ID:  1955005
Year of Publication:  1955
Abstract:  
This invention relates to the art of metal forming and relates more particularly to methods and apparatus for shaping or forming metal sheets and plates. While the invention has a wide range of application, it is especially useful in the forming of aluminium alloy sheets or plates where compressive stresses are desirable or required in the surface fibers to avoid what is termed "stress corrosion."