WO2004014620A1 - Douille-entretoise a tete forgee a froid - Google Patents

Douille-entretoise a tete forgee a froid Download PDF

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Publication number
WO2004014620A1
WO2004014620A1 PCT/US2003/007832 US0307832W WO2004014620A1 WO 2004014620 A1 WO2004014620 A1 WO 2004014620A1 US 0307832 W US0307832 W US 0307832W WO 2004014620 A1 WO2004014620 A1 WO 2004014620A1
Authority
WO
WIPO (PCT)
Prior art keywords
punch
die
fastener
head
bore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2003/007832
Other languages
English (en)
Inventor
James S. Franco
Thomas K. Litzenberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PEM Management Inc
Original Assignee
PEM Management Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE60305130T priority Critical patent/DE60305130T2/de
Priority to PCT/US2003/007832 priority patent/WO2004014620A1/fr
Priority to US10/479,048 priority patent/US20040182209A1/en
Priority to CA002454527A priority patent/CA2454527A1/fr
Priority to CN03801228.6A priority patent/CN1282510C/zh
Priority to JP2004527534A priority patent/JP3919119B2/ja
Application filed by PEM Management Inc filed Critical PEM Management Inc
Priority to AU2003225790A priority patent/AU2003225790A1/en
Priority to EP03784731A priority patent/EP1425141B1/fr
Publication of WO2004014620A1 publication Critical patent/WO2004014620A1/fr
Anticipated expiration legal-status Critical
Priority to US11/464,549 priority patent/US7421875B2/en
Priority to US12/146,859 priority patent/US7631532B2/en
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • B21J5/027—Trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/14—Ejecting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/022—Special design or construction multi-stage forging presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/44—Making machine elements bolts, studs, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/44—Making machine elements bolts, studs, or the like
    • B21K1/46—Making machine elements bolts, studs, or the like with heads
    • B21K1/50—Trimming or shearing formed heads, e.g. working with dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/56—Making machine elements screw-threaded elements

Definitions

  • the present invention relates to the formation of a self-clinching type metal fastener by a progressive forging process.
  • BACKGROUND AND DESCRIPTION OF THE PRIOR ART Internally-threaded, self-clinching type fasteners are well-known in the art. When installed, they provide materials such as sheet metal panels with a threaded structure to receive a screw so that elements can be secured to the panel.
  • a typical self-clinching fastener of the standoff type which includes an elongate barrel is shown in Figures 3 and 4.
  • the basic structures of this type of fasteners include a head, a self- clinch groove, a barrel, and an internal bore with threads.
  • the fastener is installed by a press and anvil so that the groove receives the cold flow of metal from the sheet while the polygonal head is embedded into the sheet.
  • These structures secure the fastener to the sheet rigidly, both axially and rotationally.
  • One effective means for producing a self-clinching fastener of the above- described type is by a progressive die forging process. This process utilizes sequential punch and die forging to create the head, the clinch groove, the barrel, and the internal bore of the fastener from a metal blank or slug.
  • Such a formation process is described for example in U. S. Patent Application Serial No. 2002/0054806 entitled "Grooved Nut and Manufacturing Method Thereof filed on January 3, 2001 by Sakamura et al. and published on May 9, 2002.
  • This document discloses the progressive punch and die tooling used in this process as exemplified by Figure 3. As shown in this figure, a
  • horizontally reciprocating ram holds a series of punches, each opposite a respective die providing a series of forging stations.
  • the punches and dies progressively form the basic shape of the fastener from a blank of metal which is moved between stations
  • the present invention has been devised to cure the above-described problems
  • the forging apparatus of the prior art is modified in that the punch and die tooling in the head trimming station are reversed in position. That is, the punch is positioned on the die block while the die is located on the reciprocating punch block. This reverses the
  • the fastener blank having a tubular barrel and a temporarily formed circular head is placed into a bore of a punch with the barrel of the fastener residing in the bore and an underside of the circular head abutting an end face of the punch.
  • the forging apparatus then moves the die toward the top side of the fastener until a polygonal cutting edge of the die shears metal from around the edges of the circular head of the fastener blank. Movement of the die stops when the cutting edge lies beyond the punch end face and the underside of the head of the fastener.
  • a knock-out pin which is reciprocal within the bore of the punch forceably ejects the fastener through a passage in the die and beyond an opposite side of the die into a container for completed parts.
  • the forging apparatus then moves the die away from the punch.
  • a stripper sleeve which is reciprocal about the outside surface of the punch moves from a retracted position over the end of the punch and in doing so removes a scrap ring left around the outside of the punch. Since the orientation of the tooling is horizontal, the scrap ring then falls away from the punch by gravity, and may also be assisted by pressurized oil or air to ensure the downward motion of the scrap ring is achieved.
  • the apparatus for performing the inventive head-trimming process comprises a stationary punch having a bore for holding a barrel portion of a fastener blank, an end face for supporting an underside of a head portion of the fastener blank when held in the bore, and a polygonal shank.
  • the invention further includes a reciprocal die having an internal passage and a trim plate including an aperture, the trim plate aperture having a circumferential polygonal edge closely corresponding to dimensions of the
  • the die is movable from a retracted position toward a top side of the fastener blank to an extended trim position where the
  • a stripper sleeve slidably mounted to the outside surface of the punch is reciprocal between retracted and extended positions by a spring-activated mechanism, the extended position placing a distal end of the sleeve even with the punch end face for removing a scrap ring from the punch. Since the die
  • FIG. 1 is a top diagrammatic view of a prior art multi-station cold forging
  • Figure 2 is a top plan view diagrammatically showing the cold forging
  • Figure 3 is a side partial cross section view of a fastener formed by the prior art
  • Figure 4 is a partial cross section view with an enlarged area of a fastener produced by the present invention.
  • Figure 5 is an exploded isometric assembly view of the various elements of the present invention corresponding to forging station number six shown in Figure 2.
  • Figures 6 A through 6D are side elevation partial cut-away views of the cold forging apparatus of the present invention showing its sequential operation.
  • DESCRIPTION OF THE PREFERRED E1MBODIMENT Figure 1 diagrammatically depicts the cold forging apparatus of the prior art which includes reciprocating punch block 11 that holds a series of punches 8 that
  • Figure 1 One of the aspects of the invention is the reversal of punch 8 and die 9 elements of the previous stations so that the die assembly 12 of the invention at the sixth station is held by the reciprocating punch block 11 while the punch assembly 14
  • Trim die 12 includes trim plate 27 that has a hexagonal
  • Punch assembly 14 includes a
  • the punch assembly further includes a stripper sleeve 25 and a knock-out pin 21 that are slidable within the
  • stripper sleeve and the knock-out pin are not shown and are well within the
  • the fastener blank 16 is delivered by a transfer mechanism (not shown) so
  • the first step in the trim process begins with
  • hexagonal head now resides within a passage of the die beyond a backside of the trim
  • knock-out pin 21 which is preferably spring-loaded (spring mechanism not shown) is

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Slide Fasteners (AREA)

Abstract

L'invention concerne un procédé permettant de forger une fixation métallique à froid, telle qu'une douille-entretoise autosertissable, à l'aide d'un poinçon et d'une matrice placés au niveau d'une station de rognage final de tête, des bavures de cisaillage étant produites uniquement en-dessous de la tête de fixation, là où elles ne sont pas visibles après installation. Au niveau de cette station, une ébauche de fixation (16) comprenant un corps tubulaire et une tête circulaire temporaire est placée dans un alésage du poinçon (23), le corps de la fixation étant logé dans l'alésage et le dessous de la tête circulaire venant en about avec une face d'extrémité dudit poinçon. L'appareil à forger déplace ensuite la matrice vers le côté supérieur de la fixation jusqu'à ce qu'un bord de coupe polygonal de ladite matrice (12) cisaille le métal autour des bords de la tête circulaire de l'ébauche de fixation. Le déplacement de la matrice s'arrête lorsque le bord de coupe s'étend au-delà du dessous de la tête de la fixation. Au niveau de ce point, une tige d'éjection (21) à déplacement alternatif située dans l'alésage du poinçon éjecte la fixation de force par l'intermédiaire d'un passage ménagé dans la matrice vers un point situé au-delà du côté opposé de la matrice. L'appareil à forger écarte ensuite la matrice du poinçon et, une fois que ladite matrice est dégagée du poinçon, un manchon arracheur (25) à déplacement alternatif autour de la surface extérieure dudit manchon se déplace à partir d'une position rétractée sur l'extrémité du poinçon retirant ainsi une bague de chutes résiduelles (18) située autour de l'extérieur de ce poinçon.
PCT/US2003/007832 2003-03-18 2003-03-18 Douille-entretoise a tete forgee a froid Ceased WO2004014620A1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
AU2003225790A AU2003225790A1 (en) 2003-03-18 2003-03-18 Cold-headed standoff
PCT/US2003/007832 WO2004014620A1 (fr) 2003-03-18 2003-03-18 Douille-entretoise a tete forgee a froid
US10/479,048 US20040182209A1 (en) 2003-03-18 2003-03-18 Cold-headed standoff
CA002454527A CA2454527A1 (fr) 2003-03-18 2003-03-18 Forgeage de tete a froid
CN03801228.6A CN1282510C (zh) 2003-03-18 2003-03-18 冷镦固定钉的装置和方法
DE60305130T DE60305130T2 (de) 2003-03-18 2003-03-18 Kaltgestauchter abstandshalter
EP03784731A EP1425141B1 (fr) 2003-03-18 2003-03-18 Douille-entretoise a tete forgee a froid
JP2004527534A JP3919119B2 (ja) 2003-03-18 2003-03-18 ファスナー素材縁取り加工装置及びファスナー素材から頭部を縁取りする方法
US11/464,549 US7421875B2 (en) 2003-03-18 2006-08-15 Cold-headed standoff
US12/146,859 US7631532B2 (en) 2003-03-18 2008-06-26 Cold-headed standoff

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2003/007832 WO2004014620A1 (fr) 2003-03-18 2003-03-18 Douille-entretoise a tete forgee a froid

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US10/479,048 A-371-Of-International US20040182209A1 (en) 2003-03-18 2003-03-18 Cold-headed standoff
US11/464,549 Continuation US7421875B2 (en) 2003-03-18 2006-08-15 Cold-headed standoff

Publications (1)

Publication Number Publication Date
WO2004014620A1 true WO2004014620A1 (fr) 2004-02-19

Family

ID=31713805

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/007832 Ceased WO2004014620A1 (fr) 2003-03-18 2003-03-18 Douille-entretoise a tete forgee a froid

Country Status (7)

Country Link
EP (1) EP1425141B1 (fr)
JP (1) JP3919119B2 (fr)
CN (1) CN1282510C (fr)
AU (1) AU2003225790A1 (fr)
CA (1) CA2454527A1 (fr)
DE (1) DE60305130T2 (fr)
WO (1) WO2004014620A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3322050A1 (fr) * 2016-11-11 2018-05-16 NGK Spark Plug Co., Ltd. Appareil de traitement, procédé de fabrication de produit moulé et procédé de fabrication d'électrode de bougie d'allumage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4031767B2 (ja) * 2004-03-26 2008-01-09 日東精工株式会社 ボス部材の製造方法
US7594788B2 (en) * 2005-02-08 2009-09-29 Pem Management, Inc. Clinch/broach connector
CN112808925B (zh) * 2021-02-02 2024-07-19 鹏驰五金制品（昆山）有限公司 一种半圆螺栓成型设备

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1428174A (en) * 1920-04-22 1922-09-05 John A Luther Die structure
US3296905A (en) * 1965-01-08 1967-01-10 John S Killaly Compressive stripping unit and indexing type nibbling punch for turret punch presses and the like
US3611850A (en) * 1968-07-26 1971-10-12 Dale Foundries Ltd John Manufacture of hexagonal slugs
US3968674A (en) * 1974-08-06 1976-07-13 Sakamura Machine Co., Ltd. Apparatus for simultaneously producing inner and outer rings in hot former
US4391118A (en) * 1979-06-04 1983-07-05 United States Steel Corporation Mechanism for forming a hole through a forged workpiece
US4463637A (en) * 1979-01-12 1984-08-07 Delio Ralph D Method and apparatus for trimming forgings
US4590780A (en) * 1982-10-06 1986-05-27 Hatebur Umformmaschinen Ag Process and apparatus for producing at least two forgings on a hot-forming press
US5373720A (en) * 1992-09-03 1994-12-20 Water Gremlin Company Method of making battery terminal with necked flange
US6485371B2 (en) * 2000-11-06 2002-11-26 Kabushiki Kaisha Sakamura Kikai Seisakusho Grooved nut and manufacturing method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1636691A (en) * 1923-09-20 1927-07-26 Richard M Heames Apparatus for trimming blanks

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1428174A (en) * 1920-04-22 1922-09-05 John A Luther Die structure
US3296905A (en) * 1965-01-08 1967-01-10 John S Killaly Compressive stripping unit and indexing type nibbling punch for turret punch presses and the like
US3611850A (en) * 1968-07-26 1971-10-12 Dale Foundries Ltd John Manufacture of hexagonal slugs
US3968674A (en) * 1974-08-06 1976-07-13 Sakamura Machine Co., Ltd. Apparatus for simultaneously producing inner and outer rings in hot former
US4463637A (en) * 1979-01-12 1984-08-07 Delio Ralph D Method and apparatus for trimming forgings
US4391118A (en) * 1979-06-04 1983-07-05 United States Steel Corporation Mechanism for forming a hole through a forged workpiece
US4590780A (en) * 1982-10-06 1986-05-27 Hatebur Umformmaschinen Ag Process and apparatus for producing at least two forgings on a hot-forming press
US5373720A (en) * 1992-09-03 1994-12-20 Water Gremlin Company Method of making battery terminal with necked flange
US6485371B2 (en) * 2000-11-06 2002-11-26 Kabushiki Kaisha Sakamura Kikai Seisakusho Grooved nut and manufacturing method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1425141A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3322050A1 (fr) * 2016-11-11 2018-05-16 NGK Spark Plug Co., Ltd. Appareil de traitement, procédé de fabrication de produit moulé et procédé de fabrication d'électrode de bougie d'allumage
US10847952B2 (en) 2016-11-11 2020-11-24 Ngk Spark Plug Co., Ltd. Processing apparatus, method for manufacturing molded product, and method for manufacturing spark plug electrode

Also Published As

Publication number Publication date
CN1564727A (zh) 2005-01-12
DE60305130D1 (de) 2006-06-14
EP1425141A1 (fr) 2004-06-09
EP1425141B1 (fr) 2006-05-10
CN1282510C (zh) 2006-11-01
CA2454527A1 (fr) 2004-02-19
JP3919119B2 (ja) 2007-05-23
EP1425141A4 (fr) 2004-06-30
JP2005519772A (ja) 2005-07-07
AU2003225790A1 (en) 2004-02-25
DE60305130T2 (de) 2006-12-21

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