US3557441A - Method of forming single operation rivet - Google Patents

Method of forming single operation rivet Download PDF

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Publication number
US3557441A
US3557441A US695915A US3557441DA US3557441A US 3557441 A US3557441 A US 3557441A US 695915 A US695915 A US 695915A US 3557441D A US3557441D A US 3557441DA US 3557441 A US3557441 A US 3557441A
Authority
US
United States
Prior art keywords
rivet
punch
punches
single operation
sheet
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.)
Expired - Lifetime
Application number
US695915A
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English (en)
Inventor
Arnold R Boik
Albert J Holk Jr
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.)
Continental Can Co Inc
Original Assignee
Continental Can Co 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 Continental Can Co Inc filed Critical Continental Can Co Inc
Application granted granted Critical
Publication of US3557441A publication Critical patent/US3557441A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body

Definitions

  • This invention relates in general to new and useful improvements in rivet construction and method of forming rivets, and more particularly to a rivet which is formed out of an integral width sheet material.
  • a primary feature of this invention is the ability to form a rivet from sheet material as an integral component of such sheet material with the rivet being formed in a single operation and wherein the single operation is also capable of heading the rivet.
  • Another feature of this invention is the provision of a simple tool set particularly adapted to form in a single operation a rivet from an integral width sheet material, the tool set including a pair of opposed punches of which one punch is of a smaller section than the other and the section of the smaller punch corresponding to the section of the desired rivet.
  • Another feature of this invention is the provision of a rivet which is integrally formed with and out of sheet material and wherein the material of the rivet is compressively stressed.
  • a further object of this invention is to provide a novel rivet which may be formed in a single operation and which rivet may be utilized to secure an apertured member to sheet material merely by placing the apertured member on the sheet material and positioning the apertured member and sheet material in alignment between a pair of opposed male punches, followed by the movement of the punches together so as to effect the extrusion of the sheet material in a manner to form a rivet passing through the aperture of the apertured member and headed over so as to secure the apertured member to the sheet material.
  • a specific feature of this invention is the adaptability of the rivet and the method of forming the same to the securement of pull tabs to easy opening container ends.
  • FIG. 1 is a schematic elevational view of a tool set showing the initial relationship of the tool set with respect to sheet material from which a rivet is to be formed.
  • FIG. 2 is an elevational view similar to FIG. 1 and shows the relationship of the punches after the desired ice rivet has been formed therewith, the sheet material being shown in cross section.
  • FIGS. 3 through 6, inclusive are views similar to FIG. 1 showing schematically the steps of forming in a single operation a rivet and the utilization of such a rivet to secure an apertured member to a sheet from which the rivet is formed.
  • FIG. 7 is an enlarged fragmentary sectional view taken through a portion of a rivet formed in accordance with this invention and shows schematically the compressive material flow therein.
  • FIG. 8 is a top perspective view of a can end having a pull tab secured thereto by means of an integral rivet formed in accordance with this invention.
  • FIGS. 1 and 2 there is illustrated in FIGS. 1 and 2 the manner in which a rivet is formed in a single operation in accordance with this invention.
  • a rivet is formed in and of sheet material in a single operation utilizing an extremely simple tool set which is generally referred to by the numeral 10.
  • the tool set 10 includes a pair of male punches which are disposed in opposed relation, the male punches including punches 11 and 12.
  • the punch 12 is of a smaller cross section than the punch 11.
  • the section of the punch 12 corresponds to the intended internal section of the rivet to be formed.
  • the punch 12 is illustrated as being stationary and the punch 11 as being movable towards the punch 12. It is to be understood, however, that all that is required is that there is relative movement of the punches 11 and 12 so that sheet material, such as the sheet 13 positioned between the punches 11 and 12 will be compressively stressed. It is also necessary that the section of the punch 11 at least be greater than the external section of the rivet to be formed.
  • the rivet which is generally referred to by the numeral 4, includes a tubular body 15 which snugly surround the punch 12 and thus has an internal section corresponding to that of the punch 12.
  • the rivet 14 includes a closed end 16 which is spaced from the sheet 13. The open end of the rivet 14 is, of course, integrally connected to the sheet 13.
  • FIG. 8 wherein there is illustrated a container end which is in the form of an easy opening can end generally referred to by the numeral 17.
  • the can end 17 includes an end panel 18, which is formed of sheet material. and to which there is secured a pull tab 20.
  • the pull tab 20 is permanently secured to the end panel 18 by means of an integrally formed rivet 21.
  • the tool set 22 includes a pair of opposed male punches which 3 includes a larger cross section punch 23, and a smaller cross section punch 24.
  • the punches 23 and 24 correspond to the punches 11 and 12, respectively.
  • the punch 24 is of a section corresponding to the internal section of the intended rivet. It is also to be noted that the punch 24 is a projecting portion of a larger punch member 25 and there is a shoulder 26 surrounding the punch 24. The axial extent of the punch 25 corresponds to the desired internal axial extent of the rivet 21.
  • the shoulder 26 is of a sufficient radial extent to provide for an adequate supporting of the end panel 18 during the formation of the rivet 21.
  • the cross section of the punch 23 is such as to extend radially beyond any portion of the formed rivet and at the same time small enough to be received within an associate portion of the pull tab 20.
  • the pull tab 20 has a pre-formed aperture 27 therein.
  • the end panel 18 is positioned on the punch 24 in the desired relation relative thereto.
  • the pull tab 20 is positioned on the end panel 18 in the desired relative position.
  • the pull tab 20 has the apertures 27 thereof in alignment with the punches 23 and 24.
  • the rivet 21 is formed in a single operation from the material of the end panel 18 and through the aperture 27 in the pull tab 20. Furthermore, that portion of the pull tab 20 defining the aperture 27 functions as a die for the extrusion of the rivet 21 therethrough so that there is a very tight fit between the rivet 21 and the pull tab 20.
  • the extrusion of the material of the end panel 18 continues until the end panel 18 comes to rest on the shoulder 26, as is illustrated in FIG. 5. At this time the rivet forming is complete.
  • the rivet 21 at this time includes a tubular body 28, which is integrally connected at its open end to the end panel 18, and a transverse closed end 29, which is disposed above the plane of the surrounding surface of the pull tab 20.
  • FIG. 7 in particular wherein there is illustrated an enlarged section through the rivet 14.
  • the entire rivet 14 is formed by the flowing of the material of the sheet 13 under compression, the entire rivet 14 is in compression.
  • the material of the closed end 16 of the rivet 14 has flowed radially and is compressed both radially and axially.
  • the material of the tubular body 15 of the rivet 14 has flowed axially only and is, of course, compressed axially due to the method of forming the rivet.
  • the rivet 14 differs from conventional rivets which are punched from sheet material in that where the material of such rivets is in tension, the material of the rivet 14 is in compression.
  • the materials of the sheets from which rivets may be formed in accordance with this invention are preferably readily flowable soft metals, such as aluminum.
  • the invention is not so restricted and it is feasible to form rivets in accordance with this invention from steel sheets and such harder metals, as well as plastic sheets.
  • the rivets formed in accordance with this invention be headed in the course of the single operation of forming, it is feasible to separately form the rivet in the manner illustrated in FIGS. 1 and 2, position the pull tab 20 over the rivet, and thereafter head the rivet.
  • the rivet may initially be of sufficient axial extent whereby the heading thereof may be in the form of a crimping or upsetting operation as opposed to the radial extrusion type flow illustrated in FIG. 6.
  • a single operation method of forming a rivet on a first sheet material member formed of a material that is flowable under pressure and passing the rivet through an aperture in a second sheet material member for securing the members together comprising the steps of providing a pair of male punches disposed in opposed aligned relation with one of the punches being of a smaller section than the other and of a section in accordance with the section of the intended rivet, placing the members between the punches with the second member aperture aligned with the punches and the second member being between the first member and the other punch, and moving the punches together to thereby clamp the first member therebetween under sufficient pressure to effect extrusion of the material of the first member with the extruded material flowing longitudinally around the smaller punch and through the apertured second member under the control of the apertured second member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US695915A 1968-01-05 1968-01-05 Method of forming single operation rivet Expired - Lifetime US3557441A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69591568A 1968-01-05 1968-01-05

Publications (1)

Publication Number Publication Date
US3557441A true US3557441A (en) 1971-01-26

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Application Number Title Priority Date Filing Date
US695915A Expired - Lifetime US3557441A (en) 1968-01-05 1968-01-05 Method of forming single operation rivet

Country Status (4)

Country Link
US (1) US3557441A (es)
DE (1) DE1807770A1 (es)
ES (1) ES362155A1 (es)
FR (1) FR1597329A (es)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781972A (en) * 1970-10-30 1974-01-01 Carnaud & Forges Method of securing a pull ring to an easy opening can end
US4174559A (en) * 1978-02-09 1979-11-20 J.J. & M. Fastening method
US4240360A (en) * 1977-07-08 1980-12-23 Horst Langmann Stackable flat pallet
US6539605B2 (en) * 1999-01-21 2003-04-01 Shop Vac Corporation Method of making a support structure
FR2899500A1 (fr) * 2006-04-10 2007-10-12 Seb Sa Procede de fixation d'un pied comportant un ergot a une cuve
US20090151146A1 (en) * 2007-12-18 2009-06-18 Kousuke Nagai Method, device and structure for joining two members together
US20100088881A1 (en) * 2008-10-15 2010-04-15 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Internally expanding blind, hollow rivet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10318131B3 (de) * 2003-04-22 2004-09-09 Edscha Ag Herstellung von Drei-Blech-Verbindungen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781972A (en) * 1970-10-30 1974-01-01 Carnaud & Forges Method of securing a pull ring to an easy opening can end
US4240360A (en) * 1977-07-08 1980-12-23 Horst Langmann Stackable flat pallet
US4174559A (en) * 1978-02-09 1979-11-20 J.J. & M. Fastening method
US6539605B2 (en) * 1999-01-21 2003-04-01 Shop Vac Corporation Method of making a support structure
FR2899500A1 (fr) * 2006-04-10 2007-10-12 Seb Sa Procede de fixation d'un pied comportant un ergot a une cuve
US20090151146A1 (en) * 2007-12-18 2009-06-18 Kousuke Nagai Method, device and structure for joining two members together
US20100088881A1 (en) * 2008-10-15 2010-04-15 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Internally expanding blind, hollow rivet
US8365387B2 (en) * 2008-10-15 2013-02-05 Schaeffler Technologies AG & Co. KG Method of forming a rivet and securing a piece of material

Also Published As

Publication number Publication date
FR1597329A (es) 1970-06-22
DE1807770A1 (de) 1969-08-14
ES362155A1 (es) 1970-11-01

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