EP0214284A1 - Tiges de rivets aveugles et leur procede de fabrication - Google Patents

Tiges de rivets aveugles et leur procede de fabrication

Info

Publication number
EP0214284A1
EP0214284A1 EP19860902140 EP86902140A EP0214284A1 EP 0214284 A1 EP0214284 A1 EP 0214284A1 EP 19860902140 EP19860902140 EP 19860902140 EP 86902140 A EP86902140 A EP 86902140A EP 0214284 A1 EP0214284 A1 EP 0214284A1
Authority
EP
European Patent Office
Prior art keywords
stem
tail
sleeve
former
rivet
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.)
Withdrawn
Application number
EP19860902140
Other languages
German (de)
English (en)
Inventor
John August Louw
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.)
Allfast Fastening Systems Inc
Original Assignee
Allfast Fastening Systems 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
Application filed by Allfast Fastening Systems Inc filed Critical Allfast Fastening Systems Inc
Publication of EP0214284A1 publication Critical patent/EP0214284A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/08—Hollow rivets; Multi-part rivets
    • F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
    • F16B19/1027—Multi-part rivets
    • F16B19/1036—Blind rivets
    • F16B19/1045—Blind rivets fastened by a pull - mandrel or the like
    • F16B19/1054—Blind rivets fastened by a pull - mandrel or the like the pull-mandrel or the like being frangible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/36—Rivet sets, i.e. tools for forming heads; Mandrels for expanding parts of hollow rivets
    • B21J15/365—Mandrels for expanding parts of hollow rivets

Definitions

  • Figure 3 is an illustration of the stem blank of Figure 2 after the roll forming of the knurled region 34 thereon.
  • the force versus time plot for the setting of a rivet in accordance with the present invention, but not having a locking collar thereon, may be seen in Figure 7.
  • the force increases in region 68, representing an increasing load exerted on the sleeve 56 (see Figure 5) by the shear ring 20.
  • region 70 the load or pulling force tends to level off or even decrease as yield in the sleeve forms the lower end thereof.
  • the pulling .force steadily increases in region 72, until at point 74 the shear ring shears from the rest of the ste , resulting in a substantial drop in the pulling force required as the shear ring slides up the tapered region 26 and along the knurled area 34 of the tail-former.
  • the force measured during this occurrence is represented by region 76, beginning in the area generally indicated by the numeral 78 and ending in the area generally indicated by the numeral 80 when the stem is stopped by the pulling tool, after which the pulling force steadily increases in region 82 until the stem breaks (point 84) at the breaking groove 86 (see Figure 5) .
  • this region is the force required for further pulling of the stem after the shear ring shears rom the rest of the ste at point 78 and prior to the engagement of the stem with the pressure washer and/or the anvil of the pulling tool at point 80.
  • the force at any point along regions 76 and 76a is at least somewhat indicative of the holding force of the formed inner end of the rivet, as failure of the inner end of the rivet by separation of the materials being joined will cause a stretching or deformation of the sleeve, and further motion of the shear ring along the tail-former in accordance with the force curves.
  • this force in general is higher and more uniform for rivets in accordance with the present invention than it is for prior art rivets, thereby indicating a stronger formed inner end of the rivet throughout the grip range for rivets in accordance with the present invention over those of the prior art.
  • a shoulder collar such as shoulder collar 88 ( Figure 4) may be formed in the end of the stem such as by upsetting the end of the stem preferably prior to roll forming the tapered region 26 and knurled region 34.
  • This shoulder collar normally would be a circular collar to ultimately retain a shear ring which otherwise came loose, though the knurling of the present invention provides sufficient shear ring retention so as to generally render a shoulder collar unnecessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Insertion Pins And Rivets (AREA)

Abstract

Les tiges et le procédé ci-décrits permettent de réduire le coût de fabrication du rivet et d'obtenir une résistance accrue du rivet installé. Après formage de l'anneau de cisaillement (20) sur la tige, la dépouille (26) adjacente à l'anneau de cisaillement sur l'extrémité gabarit de queue (22) de la tige est formée par laminage, la partie cylindrique de la queue (34) de la tige étant moletée au cours de la même opération de laminage ou lors d'une opération séparée de laminage. Si on le désire, un épaulement peut aussi être formé à l'extrémité de la queue de la tige avant ou après l'opération ou les opérations de laminage. La queue de tige moletée permet un meilleur serrage du rivet installé et augmente sa résistance en assurant une traction relativement élevée et constante relativement indépendante du serrage, et en tendant à empêcher l'extrusion de la douille tubulaire (56) en dehors du trou dans les parties en cours d'assemblage lors du passage de la queue de tige dans la partie de la douille tubulaire à l'intérieur du trou, les deux étant dus à la tendance de la région moletée à emporter la matière de la douille avec elle au cours de l'emboutissage du rivet, l'autre raison étant que le moletage permet un bon serrage sur l'anneau de cisaillement (20) et l'extrémité de la douille tout en présentant suffisamment d'espaces libres à l'intérieur desquels l'extrusion de la matière de la douille peut s'effectuer si nécessaire.
EP19860902140 1985-03-11 1986-03-10 Tiges de rivets aveugles et leur procede de fabrication Withdrawn EP0214284A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US71047785A 1985-03-11 1985-03-11
US710477 1985-03-11

Publications (1)

Publication Number Publication Date
EP0214284A1 true EP0214284A1 (fr) 1987-03-18

Family

ID=24854197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860902140 Withdrawn EP0214284A1 (fr) 1985-03-11 1986-03-10 Tiges de rivets aveugles et leur procede de fabrication

Country Status (2)

Country Link
EP (1) EP0214284A1 (fr)
WO (1) WO1986005560A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4919576A (en) * 1984-09-04 1990-04-24 Allfast Fastening Systems, Inc. Locking apparatus for blind fasteners
US6551040B1 (en) * 2001-12-27 2003-04-22 Huck International, Inc. Blind fastener with a blind side head having a clamp support and lock section
GB2446815C (en) 2006-12-20 2012-10-03 Avdel Gb Ltd Blind stud insert.

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US788516A (en) * 1904-07-16 1905-05-02 Trimont Mfg Company Nurling-machine.
US1798738A (en) * 1930-01-13 1931-03-31 Wilcox Rich Corp Ball and socket joint and method of making same
US1803803A (en) * 1930-02-03 1931-05-05 Kaufman Charles Process of making screws and bolts
US2283494A (en) * 1940-07-22 1942-05-19 Nat Screw & Mfg Company Method of making screw and washer assemblies
US2359997A (en) * 1941-02-27 1944-10-10 Bendix Aviat Corp Knurling tool
US2501567A (en) * 1944-05-19 1950-03-21 Huck Mfg Co Rivet
US2645953A (en) * 1948-06-02 1953-07-21 Michael J Schlitters Knurling and burnishing tool holder
US2579611A (en) * 1949-02-03 1951-12-25 John E Poorman Knurling tool
US2684604A (en) * 1950-09-21 1954-07-27 Jr Charles Henry Froberg Universal knurling tool
US3052278A (en) * 1959-02-25 1962-09-04 Western Electric Co Devices for forming grooves in articles
US3202036A (en) * 1961-05-09 1965-08-24 Nat Screw & Mfg Company Blind fastener
NL128418C (fr) * 1963-08-30
US3203303A (en) * 1964-08-10 1965-08-31 Nat Screw & Mfg Company Blind fastener
US3302510A (en) * 1964-11-27 1967-02-07 Textron Ind Inc Die-draw blind rivet with non-deforming die
US3405594A (en) * 1964-12-11 1968-10-15 Boeing Co Rivet joining method, pin therefor and pin manufacturing method
GB1145124A (en) * 1965-08-12 1969-03-12 Avdel Ltd Fastening devices
US3489056A (en) * 1967-10-02 1970-01-13 Vsi Corp Blind rivet
US3611769A (en) * 1969-05-06 1971-10-12 Vyzk Ustav Tvarecich Stroju Method and apparatus for shaping bar stock by rolling
US3657957A (en) * 1969-11-24 1972-04-25 Olympic Screw & Rivet Corp Rivet
US3869896A (en) * 1972-06-26 1975-03-11 Xerox Corp Rolling process
US3827269A (en) * 1972-11-06 1974-08-06 Gen Motors Corp Roll forming apparatus
US3866998A (en) * 1973-08-30 1975-02-18 Sealectro Corp Conductive terminal for flexible circuit boards
US3937123A (en) * 1974-04-08 1976-02-10 Textron Inc. Blind fastener with shear washer
US4012984A (en) * 1975-06-19 1977-03-22 Textron, Inc. Blind rivet assembly with locking collar on rivet stem
GB1594943A (en) * 1977-01-13 1981-08-05 Avdel Ltd Method of making a mandrel for a self-plugging blind rivet
US4230017A (en) * 1978-10-12 1980-10-28 Huck Manufacturing Company Pull-type blind fastener construction
US4312613A (en) * 1979-05-11 1982-01-26 Binns Lloyd Sylvester Blind rivet assembly
DE3111042A1 (de) * 1981-03-20 1982-09-30 Hilti AG, 9494 Schaan Befestigungsvorrichtung
EP0084641B1 (fr) * 1981-12-28 1986-11-05 SPS TECHNOLOGIES, Inc. Rivet aveugle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8605560A1 *

Also Published As

Publication number Publication date
WO1986005560A1 (fr) 1986-09-25

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19870318

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18W Application withdrawn

Withdrawal date: 19870922

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LOUW, JOHN, AUGUST