Method of attaching fastening element to a panel

Details Method of attaching fastening element to a panel Method of attaching fastening element to a panel

1986-04-16

1987-12-22

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

29523, 2924352, 411180, B21D 3900, B23P 1100

Patent

active

047138726

ABSTRACT:
A riveting or self-fastening element such as a stud for permanent attachment to a panel preferably having a preformed panel opening, including the method of attachment and the panel assembly. The self-attaching element includes an annular barrel portion having a conical external surface which is press fitted in the panel opening to deform the panel opening and form a mating conical internal surface preventing further penetration of the fastening element into the panel. The free end of the barrel portion, which is preferably cylindrical, is simultaneously deformed outwardly in a die member having an annular die cavity, forming an annular rim which is U or hook-shaped in cross section, wherein the free end is biased against the panel preventing pull-out of the fastening element. The fastening element, method of attachment and panel assembly is particularly adapted for relatively thick metal panels, including panels having a thickness greater than 0.1 inches.

REFERENCES:
patent: 2005087 (1935-06-01), Kamack
patent: 2026757 (1936-01-01), Swanstrom
patent: 2260149 (1941-10-01), Meek
patent: 3399705 (1968-09-01), Breed et al.
patent: 3432925 (1969-03-01), Woolley et al.
patent: 3754731 (1973-08-01), Mackal et al.
patent: 3938239 (1976-02-01), Lauth
patent: 4018257 (1977-04-01), Jack
patent: 4430034 (1984-02-01), Fujikawa
patent: 4490904 (1985-01-01), Moyher

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