High speed room temperature seam bonding of metal sheets
AssigneeContinental Can Company, Inc.
InventorWalter Sawert
Life of this patent
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Abstract
An improved pressure welding technique permits high speed room temperature seam bonding of metal sheets. A metal interlay is placed between the faying surfaces to be bonded and the assembly is compressed until the interlay is properly spread over the faying surfaces. The interlay has a cross-section designed to produce a highly differential flow when subjected to external compressive loads. This differential flow causes shear movement between the interlay and the faying surfaces which effects the weld. Joining speeds in excess of 10 feet per second are possible, with a reduction in sheet thickness of about 5 percent.
Claims16
In a method of cold pressure welding a pair of cold pressure weldable metal members arranged with edges of superposed end portions of said members substantially in register with one another, comprising the steps of placing a metallic interlay between the faying surfaces to be bonded to form a weld assembly and compressing said weld assembly, thereby creating an intense interfacial flow conducive to bonding of said member in a solid phase welding bond, and wherein said interlay is of cross-section such as to deform at substantially different rates, as measured along mutually perpendicular axes, consequent to said compression of said assembly.
A method of cold pressure welding a cover member to the edge of a hollow tubular member, both said members consisting of cold pressure weldable metal, comprising outwardly bending the end portions of said members to provide frustoconical interfitting flanges, placing said cylindrical member in a die wherein said die supports said flange on said cylindrical member, mounting said cover member on a circular punch wherein said punch supports said flange on said cover member, said punch being concentric with said die, placing a metallic interlay between the faying surfaces of said members, said flanges and said interlay comprising a weld assembly, and axially displacing said punch relative to said die to compress said weld assembly thereby creating an intense interfacial flow conducive to bonding of said members in a solid phase welding bond.
A method of cold pressure welding a lapped side-seam to form a hollow tube from a preformed sheet of cold pressure weldable metal, comprising placing said preformed sheet between mating male and female dies such that the axial edges of said sheet overlap, said femele die having an opening exposing said overlap, placing a metal interlay between the faying surfaces of said edges, said edges and said interlay comprising a weld assembly, and compressing said weld assembly between said male die and a punch, said punch acting through said opening in said female die, said compression creating an intense interfacial flow conducive to bonding of said edges in a solid phase welding bond.
Dependencies are inferred from the claim text.