Method and apparatus for making a forming pin

Details Method and apparatus for making a forming pin Method and apparatus for making a forming pin

1992-03-13

1993-01-26

Spruill, Robert L.

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

Process

Making headed fastener, e.g., rivet or nail, etc.

470125, 470146, 470160, B21G 300

Patent

active

051818868

ABSTRACT:
A forming pin having a shank, a head, a point, and a pair of like grooves on opposite sides of the shank is made by gripping an elongate wire in a position wherein an end of the wire is exposed, forming a head at the exposed end of the wire while gripped, advancing the wire by a predetermined distance, and simultaneously forming the point and forming the grooves. The forming pin thus formed is severed from the remaining wire as the point and the grooves are formed. A pair of dies are used, which are movable so as to pinch the wire therebetween, along with mechanisms for closing the dies. The dies are configured similarly to define suitable forming edges.

REFERENCES:
patent: 1933317 (1933-10-01), Curtis
patent: 2761157 (1956-09-01), Chism
patent: 3234572 (1966-02-01), Ruser
patent: 3604034 (1971-09-01), Leistner
patent: 3828604 (1974-08-01), Shelton
patent: 4279190 (1981-07-01), Hummel
patent: 4563890 (1986-01-01), Dickson
patent: 4576033 (1986-03-01), Corrette
patent: 4881395 (1989-11-01), Shinjo

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