Method of making a mandrel for blind rivets

Details Method of making a mandrel for blind rivets Method of making a mandrel for blind rivets

1994-08-01

1996-07-09

Crane, Daniel C.

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

With cutting

72316, 470 28, 470 40, 470137, 470156, 470191, B21F 500, B21G 312

Patent

active

055333770

ABSTRACT:
A metal rod (20) having a conical or pyramidal cut extremity (20a) is used to make a mandrel for blind rivets. The rod is held in place between a pair of die segments (11) such that its end (26) of a preset length, including the tip protrudes from an upper surface (14) of the segments. Subsequently, a free intermediate portion of the swageable end (26) is axially compressed to form a mandrel head (27) by a punch (12) which has a lower face (17) parallel to the upper surface (14) of the segments with a conical or pyramidal recess (18) formed on the end. The free intermediate portion of the swageable end (26) swells radially outward to form the head (27) having a flat flange (31) from which the tip intrudes. The mandrel, which has the head formed uniformly without any eccentricity about the longitudinal axis of a mandrel body, can be produced inexpensively using a prior art nail manufacturing apparatus.

REFERENCES:
patent: 140981 (1873-07-01), Williams
patent: 1388566 (1921-08-01), Hinchcliff
patent: 1592495 (1926-07-01), Lorenz
patent: 3236580 (1966-11-01), Jeal

Affiliated with

Also associated with

Rating

Method of making a mandrel for blind rivets 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 making a mandrel for blind rivets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making a mandrel for blind rivets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1859802