Accession Number : ADD006028

Title :   Method for Connecting Bimetallic Members by Explosive Bonding,

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Dick,Charles B ; Knutson,Curtis L ; Jones,Frederick W ; Ireland,Richard D

Report Date : 11 Jul 1978

Pagination or Media Count : 7

Abstract : This patent relates to a method for connecting bimetallic members by explosive to form a bimetallic collar having an outer aluminum ring and an inner steel ring that are connected by explosive bonding. The steel fitting is welded to the steel ring and the aluminum ring is welded to the aluminum deck. The method of making the bimetallic collar is by vertically and concentrically mounting an inner solid steel cylinder, an intermediate hollow aluminum cylinder, and an outer cardboard and thereby forming an annular acceleration cavity between the steel and aluminum cylinders and an annular powder cavity between the aluminum and cardboard cylinders. The annular powder cavity is filled with powder and ignited. The explosion causes the aluminum of the aluminum cylinder to accelerate across the acceleration cavity and become bonded to the outer surface of the solid steel cylinder. The solid steel cylinder is then bored out leaving an aluminum cylinder explosively bonded to a hollow steel cylinder. The bonded cylinders are then sliced leaving a plurality of explosively bonded concentric aluminum and steel rings. This technique has been particularly useful for connecting steel fittings to the aluminum decks of ships.

Descriptors :   *Patents, *Explosive welding, *Bonding, *Shipbuilding, Ship structural components, Steel, Aluminum alloys, Collars, Fittings, Rings, Ship decks

Subject Categories : Fabrication Metallurgy
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE