IP Library Granted Patent US 7,175,533
Granted Patent B2
US 7,175,533 · App. 11/306,008 · Granted Feb 13, 2007

Method of forming a cold-headed standoff

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Quick Facts
Patent No.
US 7,175,533
App. No.
11/306,008
Granted
Feb 13, 2007
Kind
B2
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.

Claims (13)

1. 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.

2. The method of claim 1 further including the added steps of:

retracting said die; and

removing a scrap ring from around the punch by moving a stripper sleeve slidably mounted to the outside surface of said punch until said scrap ring is pushed off the end face of the punch by said sleeve.

3. The method of claim 2 wherein said blank is ejected from said punch bore by reciprocating a knock-out pin within said punch bore.

4. The method of claim 3 wherein said die is movable in a substantially horizontal plane and said scrap ring falls away from the end face of said punch by the force of gravity upon retraction of said punch from said die.

5. The method of claim 4 wherein the die is moved toward said fastener blank coaxially relative to said punch from a retracted position toward a top side of the fastener blank to an extended trim position where said cutting edge lies beyond the punch end face.

Assignments (6)
RELEASE OF SECURITY INTEREST Recorded Jul 9, 2025
From: PNC BANK, NATIONAL ASSOCIATION
To: PENN ENGINEERING & MANUFACTURING CORP.; PEM INVESTMENTS INC.(F/K/A ACRONIX GROUP INC.); PENN ENGINEERING/SINGAPORE PTE LTD.; ACRONIX/USA INC.; ATLAS ENGINEERING, INC.; PEM INDUSTRIES, INC.; PEM INTERNATIONAL LTD.,; PEM INTERNATIONAL(SINGAPORE) PTE LTD.; PEM MANAGEMENT, INC.; PENNENGINEERING HOLDINGS, INC.; PEM UK, LTD.; 3-V FASTENER CO., INC.
Reel/Frame 071638/0849 →
PATENT SECURITY AGREEMENT Recorded Jul 10, 2017
From: PEM MANAGEMENT, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 043140/0440 →
RELEASE OF SECURITY INTEREST Recorded Jun 30, 2017
From: CREDIT SUISSE AG, AS AGENT
To: PEM MANAGEMENT, INC.
Reel/Frame 043070/0568 →
PATENT SECURITY AGREEMENT Recorded Aug 29, 2014
From: PEM MANAGEMENT, INC.
To: CREDIT SUISSE AG
Reel/Frame 033664/0460 →
RELEASE OF SECURITY INTEREST Recorded Jul 18, 2014
From: PNC BANK NATIONAL ASSOCIATION
To: PENN ENGINEERING & MANUFACTURING CORP.; PEM INVESTMENTS INC. (F/K/A ARCONIX GROUP INC.); PENNENGINEERING (SINGAPORE) PTE LTD.; ARCONIX/USA INC.; ATLAS ENGINEERING, INC.; PEM INDUSTRIES, INC.; PEM INTERNATIONAL LTD.; PEM INTERNATIONAL (SINGAPORE) PTE LTD.; PEM MANAGEMENT, INC.; PENNENGINEERING HOLDINGS, INC.; PEM UK, LTD.; 3-V FASTENER CO., INC.
Reel/Frame 033359/0323 →
SECURITY AGREEMENT Recorded Feb 6, 2009
From: PENN ENGINEERING & MANUFACTURING CORP.; PEM INVESTMENTS INC.; PENN ENGINEERING/SINGAPORE PTE LTD.; ARCONIX/USA INC.; ATLAS ENGINEERING, INC.; PEM INDUSTRIES, INC.; PEM INTERNATIONAL LTD.; PEM INTERNATIONAL (SINGAPORE) PTE LTD.; PEM MANAGEMENT, INC.; PENNENGINEERING HOLDINGS, INC.; PEM UK, LTD.; 3-V FASTENER CO., INC.
To: PNC BANK, NATIONAL ASSOCIATION
Reel/Frame 022214/0462 →