Dies for making thread-forming fasteners

Details Dies for making thread-forming fasteners Dies for making thread-forming fasteners

1981-01-29

1982-10-12

Combs, Ervin M.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72469, B21H 306

Patent

active

043532330

ABSTRACT:
A self-threading fastener has circumferentially spaced thread-forming lobes on its thread, and with a thread depth at a maximum at the lobes and a minimum circumferentially between the lobes. A lobe in one turn is circumferentially offset from a lobe in an adjacent turn. The fastener is made on roll-threading dies each having grooves sinulsoidally varying in depth from a maximum at one region to a minimum at a second region. The spacing of the regions is equal to a fraction of the thread pitch multiplied by the cosecant of the thread helix angle.

REFERENCES:
patent: 2352982 (1964-07-01), Tomalis
patent: 3163196 (1964-12-01), Hanneman
patent: 3180202 (1965-04-01), Kahn
patent: 3195156 (1965-07-01), Phipard
patent: 3263473 (1966-08-01), Phipard
patent: 3685328 (1972-08-01), Carpenter et al.
patent: 3772720 (1973-11-01), Yamamoto
patent: 3800585 (1974-04-01), Simons et al.
patent: 3818749 (1974-06-01), Yankee et al.
patent: 3934444 (1976-01-01), Simons

Affiliated with

Also associated with

Rating

Dies for making thread-forming fasteners does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dies for making thread-forming fasteners, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dies for making thread-forming fasteners will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-218286