Method of joining two or more pieces of malleable material

Details Method of joining two or more pieces of malleable material Method of joining two or more pieces of malleable material

1984-12-21

1986-09-16

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

29459, 29509, 29 211, 292435, 292835, 2924354, B23P 1100

Patent

active

046113819

ABSTRACT:
A method of joining together two or more pieces of malleable material. The method includes the steps of placing thoroughly cleaned surfaces of the pieces in intimate contact with each other and forming a flanged hole through all of them at the same time. This is accomplished by directing a draw punch against the pieces and directing the same into the opening of a die while the material is compressively stressed to a value substantially equal to the yield strength of the material. The punch provides the completed flanges with an hourglass shape, such shape locking the inner and outer flanges together against axial displacement.

REFERENCES:
patent: 2186381 (1940-01-01), Howe
patent: 2215918 (1940-09-01), Fay
patent: 3082850 (1963-03-01), Weening
patent: 3093885 (1963-06-01), Morrison et al.
patent: 3824675 (1974-07-01), Ballantyne
patent: 4306511 (1981-12-01), Ashby et al.

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