Manufacturing process of a clinch nut and clinch nut...

Details Manufacturing process of a clinch nut and clinch nut... Manufacturing process of a clinch nut and clinch nut...

2006-02-28

2006-02-28

Tolan, Ed (Department: 3725)

Threaded, headed fastener, or washer making: process and apparat

Process

Making internally threaded fastener, e.g., nut

C470S020000, C470S021000

Reexamination Certificate

active

07004845

ABSTRACT:
A manufacturing process of a clinch nut consists in forming a recess zone in a rough casting by cold heading so as to obtain a rough part. The rough part then undergoes a thermal annealing treatment followed by a cold heading operation enabling a bore to be formed designed to contain an internal thread. The internal thread is preferably achieved by tapping by upsetting material from the bore of the nut.

REFERENCES:
patent: 2253765 (1941-08-01), Cox
patent: 3279304 (1966-10-01), Hopkins
patent: 5213460 (1993-05-01), Sadri et al.
patent: 5282698 (1994-02-01), Wright et al.
patent: 6702536 (2004-03-01), Nilsen
patent: 6761520 (2004-07-01), Dise
patent: WO 02/38329 (2002-05-01), None

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