All purpose integral rivet and method of forming same

Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

723792, B21D 5138

Patent

active

051196646

ABSTRACT:
An improved integral rivet button and resulting rivet, and a process and tooling for forming such button, utilizes successive coining steps on material surrounding the base of an initial bubble formed on a can end, causing flow of material along the wall of the button toward its center. The successive coining at progressively lesser radii affords adequate metal in the bubble region to assure ultimate formation of an accurate button, assures a strong boundary region about the base of the button, and assures the rivet head is sufficiently large to prevent tear out of the tab at its juncture with the rivet. The initial coined boundary is located close to the juncture of the initial bubble wall with the remainder of the shell, where curvature of the initial bubble wall is concave in the direction of the bubble top and toward the ultimate public side of the end. Subsequent coining at one or more locations radially inward from the initial coined boundary causes material to flow into the region from which the button ultimately is formed, and such material is reshaped into a precise button form having improved overall thickness and strength. Tooling design is such that intermediate shapes formed at progressive tool stations are compatible with next tooling stations to promote smooth transition of metal.

REFERENCES:
patent: 3194047 (1965-07-01), Eggert, Jr. et al.
patent: 3361102 (1968-01-01), Rouse
patent: 3387481 (1968-06-01), Harvey et al.
patent: 3391819 (1968-07-01), Henchert
patent: 3457761 (1969-07-01), Brosseit
patent: 3583348 (1971-06-01), Brown
patent: 3638597 (1972-02-01), Brown
patent: 4568230 (1986-02-01), Brown
Alcoa Product Data Rigid Container Sheet Jan. 1, 1986.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

All purpose integral rivet and method of forming same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with All purpose integral rivet and method of forming same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and All purpose integral rivet and method of forming same will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1796492

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.