US20040202524A1 - Self-punching fastener for pressing into a metal sheet which achieves optimal safety against rotation and pressing out - Google Patents

Self-punching fastener for pressing into a metal sheet which achieves optimal safety against rotation and pressing out Download PDF

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Publication number
US20040202524A1
US20040202524A1 US10/836,044 US83604404A US2004202524A1 US 20040202524 A1 US20040202524 A1 US 20040202524A1 US 83604404 A US83604404 A US 83604404A US 2004202524 A1 US2004202524 A1 US 2004202524A1
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US
United States
Prior art keywords
metal sheet
self
fastener
punching
pressing
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.)
Abandoned
Application number
US10/836,044
Inventor
Gerold Ross
Detlef Ludwig
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.)
Textron Verbindungstechnik GmbH and Co OHG
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Textron Verbindungstechnik GmbH and Co OHG
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Application filed by Textron Verbindungstechnik GmbH and Co OHG filed Critical Textron Verbindungstechnik GmbH and Co OHG
Priority to US10/836,044 priority Critical patent/US20040202524A1/en
Publication of US20040202524A1 publication Critical patent/US20040202524A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • B23P19/06—Screw or nut setting or loosening machines
    • B23P19/062—Pierce nut setting machines
    • 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
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
    • F16B37/06—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting
    • F16B37/062—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting
    • F16B37/068—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting by deforming the material of the support, e.g. the sheet or plate
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/49—Member deformed in situ
    • Y10T403/4966—Deformation occurs simultaneously with assembly

Definitions

  • the present invention relates to a self-punching fastener, which in a way safe against rotation and pressing out can be pressed into a metal sheet having an annular body, the side of which facing the metal sheet is having radially positioned projections, which are pressed into the surface thereof during the setting in the centre of which an interior thread being provided and which on the side of the annular body facing the metal sheet in the set state is having a surrounding annular depression into which the metal sheet material displaced during the setting is pressed.
  • the present invention is based on the fact that for achieving an optimal safety against rotation burl-shaped locking elements are provided in a maximal distance to the central axis to make use of the most effective lever against the rotational momentum at the utmost supporting collar of the annular depression.
  • a further advantage of the solution according to the invention is consisting in the fact that by the above described displacing of the security against rotation and the inclined formation of the bottom of the annular depression at the innermost limit of the annular depression—the punching collar—there is more space for the penetration of the cutting ring of the punching die available, which means it is possible to work with larger thicknesses of the metal sheets or larger gauge ranges with the solution according to the invention.
  • the coordination between the punching die geometry and the shape of the annular depression and the kind of security against rotation according to the invention is ensuring that after the pressing-in of the metal sheet material a jamming on the punching die is prevented and therefore a high working safety is secured.
  • the shape of the projections or burls can be arched as well as with sharp edges (triangular).
  • FIG. 1 is showing a fastener according to the invention in the shape of a nut consisting of an annular basic body 10 .
  • a through-bore which at least over a part of the height of the fastener 10 is formed as a thread 11 .
  • the fastener 10 according to the invention is provided with an annular depression 12 , the bottom face of which starting from its inner limitation—the punching collar 13 —is inclined to its outer limitation, i.e. the supporting collar 14 .
  • annular depression 12 at the outer supporting collar 14 there are provided evenly distributed burl-shaped locking elements 15 in an annular array.
  • the punching collar 13 is having an undercut 16 towards the axis 20 of the fastener 10 according to the invention and the supporting collar 14 is having an undercut 17 in the direction of the exterior enveloping face 18 of the fastener 10 according to the invention.
  • the punching collar 13 is having a cutting edge 19 .
  • FIG. 2 shows the fastener 10 according to the invention of FIG. 1 in a bottom view.
  • the shape and the position of the burl-shaped locking elements 15 are clearly shown.
  • the burl-shaped locking elements 15 are positioned at the outer supporting collar 14 and are forming a free-space towards the punching collar 13 .
  • FIG. 2 the variant with annularly shaped burl-shaped locking elements 15 is shown.
  • FIG. 3 shows the fastener 10 according to the invention in an embodiment having sharp-edged (triangular) burl-shaped locking elements 25 .
  • FIG. 4 shows the fastener 10 according to the invention in accordance to FIGS. 1, 2 and 3 as well as the punching die 30 and the metal sheet member 40 . From this representation it can be learnt that the metal sheet member 40 does not have a prefabricated hole and does not need any further preparation.
  • the punching die 30 is having a cutting edge 31 and a swaging ring 32 having a special geometry 33 .
  • the exterior enveloping face 34 of the swaging ring 32 is running conically towards the central axis 20 of the punching die 30 . This is ensuring that after the punching and pressing-in of the metal sheet member 40 into the annular depression 12 a jamming of the swaging ring 32 in the metal sheet member 40 is avoided.
  • FIG. 5 shows the fastener 10 according to the invention of FIG. 1 to 3 shortly after the finalization of the setting procedure.
  • FIG. 6 is showing the fastener 10 according to the invention completely set in a metal sheet member 40 .
  • the action of the undercut 16 , 17 at the punching collar 13 and at the supporting collar 14 is clearly shown.
  • the annular depression 12 is filled with the material of the metal sheet member 40 .
  • the burl-shaped locking elements 14 , 25 are embadded in the metal sheet member 40 .
  • the positive action of the bottom face of the annular depression 12 inclined to the exterior for enlarging the active length of the punching collar 13 and therefore for increasing the range of useable gauge ranges of the metal sheets for the fastener 10 according to the invention can be clearly noticed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Insertion Pins And Rivets (AREA)
  • Connection Of Plates (AREA)
  • Soil Working Implements (AREA)
  • Clamps And Clips (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Adhesive Tapes (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

A self-punching fastener (10), which in a way is safe against rotation and pressing out and which can be pressed into a metal sheet member (40) having an annular body, the side of which facing the metal sheet has radially disposed projections (15, 25), which, during the pressing-in, are pressed into the metal sheet member (40) and thereby secure the fastener (10) against rotation, wherein in the center an interior thread (11) is positioned and, wherein on the side facing the metal sheet member (40) in the set state there is provided an annular depression (12) into which the material displaced during the setting is pressed.

Description

  • The present invention relates to a self-punching fastener, which in a way safe against rotation and pressing out can be pressed into a metal sheet having an annular body, the side of which facing the metal sheet is having radially positioned projections, which are pressed into the surface thereof during the setting in the centre of which an interior thread being provided and which on the side of the annular body facing the metal sheet in the set state is having a surrounding annular depression into which the metal sheet material displaced during the setting is pressed. [0001]
  • It is the task to be solved by the present invention to improve such a fastener in such a way that with the same geometry in a maximal range of gauges of the metal sheet can be used with a high safety against rotation and pressing out without a previous punching or a special preparation of the holes into which the fastener is to be set being necessary. [0002]
  • According to the prior art, the known solutions were based on the assumption that an optimal safety against rotation and pressing out and a broad range of use of the fastener is achieved if for the locking against rotation continuous ridges are provided within the annular depression and if the bottom of the annular depression is parallel to the surface of the metal sheets to be worked. [0003]
  • Contrary to this, the present invention is based on the fact that for achieving an optimal safety against rotation burl-shaped locking elements are provided in a maximal distance to the central axis to make use of the most effective lever against the rotational momentum at the utmost supporting collar of the annular depression. [0004]
  • A further advantage of the solution according to the invention is consisting in the fact that by the above described displacing of the security against rotation and the inclined formation of the bottom of the annular depression at the innermost limit of the annular depression—the punching collar—there is more space for the penetration of the cutting ring of the punching die available, which means it is possible to work with larger thicknesses of the metal sheets or larger gauge ranges with the solution according to the invention. [0005]
  • The coordination between the punching die geometry and the shape of the annular depression and the kind of security against rotation according to the invention is ensuring that after the pressing-in of the metal sheet material a jamming on the punching die is prevented and therefore a high working safety is secured. [0006]
  • Into the undercuts formed during the production of the parts as well at the inner punching collar as on the supporting collar of the annular depression during the pressing-in of the parts the material of the metal sheet is shaped into said undercuts ensuring that even with the working in thin metal sheets a high safety against rotation and pressing out of the fastener is achieved. [0007]
  • The shape of the projections or burls can be arched as well as with sharp edges (triangular).[0008]
  • In the following, the invention is more detailly described with reference to the attached drawings. [0009]
  • FIG. 1 is showing a fastener according to the invention in the shape of a nut consisting of an annular [0010] basic body 10. In the centre of the cylindrical fastener 10 there is a through-bore which at least over a part of the height of the fastener 10 is formed as a thread 11.
  • On the bottom side, the [0011] fastener 10 according to the invention is provided with an annular depression 12, the bottom face of which starting from its inner limitation—the punching collar 13—is inclined to its outer limitation, i.e. the supporting collar 14. Within this annular depression 12 at the outer supporting collar 14 there are provided evenly distributed burl-shaped locking elements 15 in an annular array. The punching collar 13 is having an undercut 16 towards the axis 20 of the fastener 10 according to the invention and the supporting collar 14 is having an undercut 17 in the direction of the exterior enveloping face 18 of the fastener 10 according to the invention. The punching collar 13 is having a cutting edge 19.
  • FIG. 2 shows the [0012] fastener 10 according to the invention of FIG. 1 in a bottom view. The shape and the position of the burl-shaped locking elements 15 are clearly shown. The burl-shaped locking elements 15 are positioned at the outer supporting collar 14 and are forming a free-space towards the punching collar 13. In this representation (FIG. 2) the variant with annularly shaped burl-shaped locking elements 15 is shown.
  • FIG. 3 shows the [0013] fastener 10 according to the invention in an embodiment having sharp-edged (triangular) burl-shaped locking elements 25.
  • FIG. 4 shows the [0014] fastener 10 according to the invention in accordance to FIGS. 1, 2 and 3 as well as the punching die 30 and the metal sheet member 40. From this representation it can be learnt that the metal sheet member 40 does not have a prefabricated hole and does not need any further preparation. The punching die 30 is having a cutting edge 31 and a swaging ring 32 having a special geometry 33. The exterior enveloping face 34 of the swaging ring 32 is running conically towards the central axis 20 of the punching die 30. This is ensuring that after the punching and pressing-in of the metal sheet member 40 into the annular depression 12 a jamming of the swaging ring 32 in the metal sheet member 40 is avoided.
  • FIG. 5 shows the [0015] fastener 10 according to the invention of FIG. 1 to 3 shortly after the finalization of the setting procedure. By the punching collar 13 in corporation with the cutting edge 31 of the punching die 30, a disk 41 has been punched out of the metal sheet member 40 and the material of the metal sheet member 40 has been swaged into the annular depression 12 by the swaging ring 32 enclosing the burl-shaped locking elements 15, 25. The stemmed out disk 41 is discarded downwardly from the punching die 30.
  • FIG. 6 is showing the [0016] fastener 10 according to the invention completely set in a metal sheet member 40. The action of the undercut 16, 17 at the punching collar 13 and at the supporting collar 14 is clearly shown. The annular depression 12 is filled with the material of the metal sheet member 40. The burl- shaped locking elements 14, 25 are embadded in the metal sheet member 40. The positive action of the bottom face of the annular depression 12 inclined to the exterior for enlarging the active length of the punching collar 13 and therefore for increasing the range of useable gauge ranges of the metal sheets for the fastener 10 according to the invention can be clearly noticed.

Claims (5)

1-6. (canceled).
7. A self-punching fastener (10) for pressing into a metal sheet (40) that achieves optimal safety against rotation and pressing out, said self-punching fastener comprising:
an annular body having a side that faces the metal sheet (40) when said self-punching fastener (10) is pressed into the metal sheet (40) and set;
projections (15, 25) radially positioned on said side of the annular body that faces said metal sheet (40), said projections (15, 25) being pressed into said metal sheet (40) during pressing in of said self-punching fastener (10) to secure said self-punching fastener (10) against rotation;
an interior thread (11) positioned in a center of said annular body;
an annular depression (12) on said side of the annular body that faces the metal sheet (40) into which a displaced material of said metal sheet (40) is pressed when said self-punching fastener is pressed into said metal sheet (40) and set, said annular depression (12) being limited by a collar (14) positioned on an outer rim of said annular depression (12) and by a collar-shaped projection (13) positioned about said annular depression (12) in a direction of said interior thread (11);
wherein said projections (15, 25) are evenly distributed and radially positioned in said annular depression (12) substantially on said outer rim of said annular depression (12) at said collar (14) and not positioned in said annular depression (12) at said collar-shaped projection (13);
wherein said collar-shaped projection (13) is shaped as to punch a hole into said metal sheet (40) during setting of said self-punching fastener (10), said hole having a diameter of said collar-shaped projection (13);
wherein said collar (14) has an undercut (17) with respect to annular depression (12) which receives said material of metal sheet (40) during the pressing in of said self-punching fastener (10) to lock said self-punching fastener (10) against axial pressing out.
8. The self-punching fastener (10) according to claim 7, wherein said collar-shaped projection (13) has a height that is adapted to a gauge of the metal sheet (40) to be punched.
9. The self-punching fastener (10) according to claim 7, wherein said collar-shaped projection (13) has an undercut (16) with respect to annular depression (12) which receives said material of the metal sheet (40) during the pressing in of said self-punching fastener (10) to achieve a locking of said self-punching fastener (10) against axial pressing out.
10. The self-punching fastener (10) according to claim 7, wherein annular depression (12) has a bottom face which is inclined from an interior to an exterior of said annular depression (12) in the direction of said metal sheet (40).
US10/836,044 2001-08-22 2004-04-29 Self-punching fastener for pressing into a metal sheet which achieves optimal safety against rotation and pressing out Abandoned US20040202524A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/836,044 US20040202524A1 (en) 2001-08-22 2004-04-29 Self-punching fastener for pressing into a metal sheet which achieves optimal safety against rotation and pressing out

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE20113853U DE20113853U1 (en) 2001-08-22 2001-08-22 Self-piercing, twist and squeeze-proof fastening element that can be pressed into a sheet
DE20113853.0 2001-08-22
US10/128,642 US20030039530A1 (en) 2001-08-22 2002-04-22 Self-punching fastener which in a way safe against rotation and pressing out can be pressed into a metal sheet
US10/836,044 US20040202524A1 (en) 2001-08-22 2004-04-29 Self-punching fastener for pressing into a metal sheet which achieves optimal safety against rotation and pressing out

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US10/128,642 Continuation US20030039530A1 (en) 2001-08-22 2002-04-22 Self-punching fastener which in a way safe against rotation and pressing out can be pressed into a metal sheet

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US10/128,642 Abandoned US20030039530A1 (en) 2001-08-22 2002-04-22 Self-punching fastener which in a way safe against rotation and pressing out can be pressed into a metal sheet
US10/487,495 Expired - Lifetime US7258517B2 (en) 2001-08-22 2002-08-22 Self-punching fastener with radially positioned projections and an annular depression
US10/836,044 Abandoned US20040202524A1 (en) 2001-08-22 2004-04-29 Self-punching fastener for pressing into a metal sheet which achieves optimal safety against rotation and pressing out

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US10/128,642 Abandoned US20030039530A1 (en) 2001-08-22 2002-04-22 Self-punching fastener which in a way safe against rotation and pressing out can be pressed into a metal sheet
US10/487,495 Expired - Lifetime US7258517B2 (en) 2001-08-22 2002-08-22 Self-punching fastener with radially positioned projections and an annular depression

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US (3) US20030039530A1 (en)
EP (2) EP1286063A1 (en)
AT (1) ATE284493T1 (en)
AU (1) AU2002331556B2 (en)
BR (1) BR0212146B1 (en)
CA (1) CA2374427C (en)
DE (3) DE20113853U1 (en)
ES (1) ES2237693T5 (en)
HU (1) HU230330B1 (en)
IL (1) IL160520A0 (en)
MX (1) MXPA04001711A (en)
NZ (1) NZ531842A (en)
PL (1) PL202510B1 (en)
PT (1) PT1419319E (en)
TW (1) TWI228572B (en)
WO (1) WO2003019019A1 (en)
ZA (1) ZA200402271B (en)

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WO2003019019A1 (en) 2003-03-06
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US20040247380A1 (en) 2004-12-09
ES2237693T3 (en) 2005-08-01
EP1419319A1 (en) 2004-05-19
ZA200402271B (en) 2005-05-25
ATE284493T1 (en) 2004-12-15
CA2374427C (en) 2010-11-30
AU2002331556B2 (en) 2006-11-16
DE10293809D2 (en) 2004-07-08
PT1419319E (en) 2005-04-29
HUP0401574A2 (en) 2004-11-29
EP1419319B1 (en) 2004-12-08
EP1419319B2 (en) 2009-04-01
NZ531842A (en) 2005-12-23
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HU230330B1 (en) 2016-02-29
TWI228572B (en) 2005-03-01
CA2374427A1 (en) 2003-02-22
US7258517B2 (en) 2007-08-21
IL160520A0 (en) 2004-07-25
EP1286063A1 (en) 2003-02-26
PL368071A1 (en) 2005-03-21
BR0212146B1 (en) 2010-12-14
PL202510B1 (en) 2009-06-30
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US20030039530A1 (en) 2003-02-27
MXPA04001711A (en) 2004-05-31

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