Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1975-06-30
1976-06-08
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
29509, 29521, 29522, B23P 900, B21D 3900, B23P 1100
Patent
active
039614123
ABSTRACT:
A nut for installation on a metal panel includes an end mounting face and a centrally located circular bore through said face for threadedly receiving a bolt. The nut further includes a counterbore concentric with the circular bore and axially terminating in an annular surface having a plurality of equally spaced points projecting toward the mounting face. The points define a crown-shaped indent having a valley between each pair of adjacent points for receiving panel material to stabilize the nut during a threading operation against rotational and axial displacement.
The method for installing the nut on the panel includes positioning the nut mounting face against a metal panel and piercing the panel in alignment with the nut bore axis to deflect the panel material circumscribed by the counterbore into said counterbore indent. The deflected material assumes an annular configuration projecting from the panel and terminating in a crown-shaped end portion adjacent and conjugate to the terminal end of the nut counterbore. The interlocking counterbore and panel projection configurations stabilize the nut on the panel and may be utilized in combination with a self-tapping bolt which is threaded into the counterbore to simultaneously thread the inner surface of the nut points and the terminal portion of the projection, before threading into the circular nut bore.
The piercing die for forming the panel projection and installing the nut on the panel includes an elongated piercing tool and a support structure for receiving and orienting the nut. The piercing tool includes a rounded tip having a plurality of flat surfaces or grooves inclined relative to the tool axis. The tip surfaces intersect to form a piercing point and tearing edges, which form the crown-shaped terminal portion of the panel projection.
REFERENCES:
patent: 1600665 (1926-09-01), Cocks
patent: 2004182 (1935-06-01), Arey
patent: 2379804 (1945-07-01), Johnson
patent: 3234987 (1966-02-01), Hentzi
patent: 3282315 (1966-11-01), Zahodiakin
patent: 3282317 (1966-11-01), Zahodiakin
patent: 3510929 (1970-05-01), Kilmarx
Moon Charlie T.
Multifastener Corporation
LandOfFree
Method of installing a fastener does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of installing a fastener, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of installing a fastener will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1091574