Method of forming a cold-headed standoff
AssigneePEM Management, Inc.
InventorsJames S Franco, Thomas K Litzenberger
Life of this patent
Estimating the term…
Abstract
A method of head trimming a fastener blank in a cold-forging process comprises placing a fastener blank into a bore of a punch having an end face; supporting an underside of a head portion of the fastener blank with the punch end face; moving a die having an internal passage and a trim plate with a cutting edge toward the fastener blank; shearing the head of the fastener blank with the cutting edge of the trim plate; stopping movement of the die at an extended trim position where the cutting edge lies beyond an underside of the head portion of the fastener blank; ejecting the fastener blank from the punch bore and through the die passage to an opposite side of the die; retracting the die; and removing a scrap ring from around the punch by a stripper sleeve.
Claims5
The method of head trimming a fastener blank in a cold-forging process, comprising:
- placing a fastener blank into a bore of a punch having an end face;
- supporting an underside of a head portion of said fastener blank with said punch end face;
- moving a die having an internal passage and a trim plate with a cutting edge toward said fastener blank;
- shearing the head of said fastener blank with the cutting edge of the trim plate;
- stopping movement of said die at an extended trim position where said cutting edge lies beyond an underside of the head portion of said fastener blank;
- and
- ejecting said fastener blank from said punch bore and through said die passage to an opposite side of the die.
Dependencies are inferred from the claim text.