Way of joining a hard and a soft sheet

Details Way of joining a hard and a soft sheet Way of joining a hard and a soft sheet

1979-08-16

1981-08-04

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

29512, 29513, 29522R, 29526R, 113116FF, 403283, B23P 1100

Patent

active

042814464

ABSTRACT:
A method and structure for joining a harder to a softer sheet are disclosed. Sharp projections are formed surrounding a hole on the harder sheet, and these projections are penetrated through the softer sheet and then bent back and around so as to engage with the softer sheet. In a preferred embodiment, the projections are formed by boring a conical hole in the harder sheet, cutting radial slots which lead outwards from the hole, and bending the periphery of the hole perpendicular to the sheet. The acute angle formed by the conical surface of the hole and one face of the sheet ensures that the projections are sharp.

REFERENCES:
patent: 1831556 (1931-11-01), Figge
patent: 2515105 (1950-07-01), Weisberg
patent: 3197729 (1965-07-01), Sarazen
patent: 3283061 (1966-11-01), Balling
patent: 3364560 (1968-01-01), Roy

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