EP1013945B1 - Self-piercing rivet - Google Patents

Self-piercing rivet Download PDF

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Publication number
EP1013945B1
EP1013945B1 EP99120398A EP99120398A EP1013945B1 EP 1013945 B1 EP1013945 B1 EP 1013945B1 EP 99120398 A EP99120398 A EP 99120398A EP 99120398 A EP99120398 A EP 99120398A EP 1013945 B1 EP1013945 B1 EP 1013945B1
Authority
EP
European Patent Office
Prior art keywords
shank
groove
rivet
self
shaft
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
EP99120398A
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German (de)
French (fr)
Other versions
EP1013945A1 (en
Inventor
Georg Donhauser
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.)
Kerb Konus Vertriebs GmbH
Original Assignee
Kerb Konus Vertriebs GmbH
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 Kerb Konus Vertriebs GmbH filed Critical Kerb Konus Vertriebs GmbH
Publication of EP1013945A1 publication Critical patent/EP1013945A1/en
Application granted granted Critical
Publication of EP1013945B1 publication Critical patent/EP1013945B1/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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines

Definitions

  • the innovation relates to a punch-embossed rivet according to the preamble of claim 1.
  • Stamped-embossed rivets are used to connect two flat workpieces.
  • the punch rivet is here with the formation of two punch holes with its shaft through the workpieces pressed.
  • the lower workpiece seen in the punching direction consists of a plastic deformable material, usually a sheet. Near the end of the shaft the Shank a shaft groove. After the punching process, around the end of the shaft the lower workpiece is shaped by an annular groove tool, which makes the material of the lower workpiece is pressed into the shaft groove.
  • the shank groove has a trapezoidal shape in cross section.
  • the upper workpiece consists of one soft material, such as a soft sheet or plastic, then material is sheared from the upper workpiece by the upper edge of the shank groove and pressed into the shaft groove. As a result, the material intake volume for the Lower workpiece material reduced, creating a poor riveted joint is effected. If the upper workpiece is made of plastic, it can be used as a whole Filling the shaft groove with plastic come so that the rivet connection does not is useful.
  • the punch rivets are manufactured as turned parts.
  • a punch-emboss rivet according to the preamble of claim 1 is known from DE-U-297 07 669.
  • the first factor is that the shaft groove overall and should only be filled with material from the lower workpiece.
  • the second factor is the angle at which the section facing the shaft end of the Shaft groove runs. An ideal approach would be to approximate an angle of 90 ° however, the risk of breakage mentioned above is significantly increased.
  • the task is to design the rivet so that the strength of the rivet connection is increased without the disadvantages mentioned above occurring.
  • the stamped embossed rivet is designated 1 in its entirety.
  • the one made with it Rivet connection connects an upper sheet metal part 2 with a lower sheet metal part 3.
  • the rivet 1 has a truncated cone-shaped rivet head 4 and an adjoining one Shank 5 on
  • the shaft 5 is provided with a shaft groove 6, which is downward a cylindrical section 7 of the shaft 5 connects.
  • the rivet is passed through from top to bottom Sheet metal parts 2, 3 pressed, which in the sheet metal parts 2, 3 aligned with each other Punch holes are created.
  • a ring-shaped tool around the section 7 around a groove 8 whereby is caused that material of the lower plate 3 with plastic deformation in the Shaft groove 6 is pressed and fills it.
  • This shaft groove 6 is concave, but has a circular shape deviating shape, which approximately corresponds to a drop shape.
  • the section 10 of the annular groove 6 facing the rivet head 4 runs relatively below one flat angle ⁇ to the axis 11 of the rivet 1.
  • Section 12 of the annular groove 6 extends at an angle ⁇ to the axis 11, which is larger than 90 °.
  • the inclination of the section 10 thus corresponds to the angle ⁇ , while the Inclination of section 12 corresponds to the angle 180 ° - ⁇ .
  • This supplementary angle is in any case larger than the angle ⁇ .
  • the annular groove has a rounding 13 between the two sections 10, 12.
  • the Transition between section 10 and shaft 5 can also be rounded, during the transition from section 12 of annular groove 6 to section 7 of shaft 5 can be formed with sharp edges.
  • the relatively steep course of section 12 of the groove 6 is for the strength of the riveted joint is of decisive influence.
  • the angle ⁇ is larger than 90 ° and the more it approaches this value, the higher the resulting one Strength of the riveted joint.
  • the limit of the angle ⁇ is primarily determined by the hardness of the material of the sheet 3. It should be chosen so that no breakage of the rivet shaft occurs in the area of the groove 6.

Abstract

The rivet has a truncated, cone-shaped head (4) with a shaft (5) which has a concave groove (6). The section (10) of the shaft which faces the head runs at a flatter angle ( alpha ) to the shaft axis (11) than the section (12) that faces the end (9) of the shaft.

Description

Die Neuerung betrifft einen Stanz-Prägeniet nach dem Oberbegriff des Anspruches 1.The innovation relates to a punch-embossed rivet according to the preamble of claim 1.

Stanz-Prägeniete dienen der Verbindung zweier flacher Werkstücke. Der Stanzniet wird hierbei unter Bildung zweier Stanzlöcher mit seinem Schaft durch die Werkstücke gedrückt. Das in Stanzrichtung gesehen untere Werkstück besteht aus einem plastisch verformbaren Material, üblicherweise einem Blech. Nahe dem Schaftende weist der Schaft eine Schaftnut auf. Nach dem Stanzvorgang wird um das Schaftende herum in das untere Werkstück durch ein Werkzeug eine Ringnut geprägt, wodurch Material des unteren Werkstücks in die Schaftnut gedrückt wird.Stamped-embossed rivets are used to connect two flat workpieces. The punch rivet is here with the formation of two punch holes with its shaft through the workpieces pressed. The lower workpiece seen in the punching direction consists of a plastic deformable material, usually a sheet. Near the end of the shaft the Shank a shaft groove. After the punching process, around the end of the shaft the lower workpiece is shaped by an annular groove tool, which makes the material of the lower workpiece is pressed into the shaft groove.

Bei einem bekannten Niet (siehe z.B. US-A-3 909 913) weist die Schaftnut im Querschnitt eine Trapezform auf. Werden Werkstücke aus einem harten Werkstoff verarbeitet, dann besteht die Gefahr, daß der Schaft im Bereich der Schaftnut bricht. Besteht das obere Werkstück aus einem weichen Material, wie beispielsweise aus einem weichen Blech oder Kunststoff, dann wird von der oberen Kante der Schaftnut Material vom oberen Werkstück abgeschert und in die Schaftnut gedrückt. Hierdurch wird das Materialaufnahmevolumen für das Material des unteren Werkstücks reduziert, wodurch eine schlechte Nietverbindung bewirkt wird. Besteht das obere Werkstück aus Kunststoff, kann es zum gesamten Ausfüllen der Schaftnut mit Kunststoff kommen, so daß die Nietverbindung nicht brauchbar ist. Die Stanzniete werden als Drehteil hergestellt.In a known rivet (see e.g. US-A-3 909 913) the shank groove has a trapezoidal shape in cross section. If workpieces made of a hard material are processed, there is a risk of that the shaft breaks in the area of the shaft groove. The upper workpiece consists of one soft material, such as a soft sheet or plastic, then material is sheared from the upper workpiece by the upper edge of the shank groove and pressed into the shaft groove. As a result, the material intake volume for the Lower workpiece material reduced, creating a poor riveted joint is effected. If the upper workpiece is made of plastic, it can be used as a whole Filling the shaft groove with plastic come so that the rivet connection does not is useful. The punch rivets are manufactured as turned parts.

Ein Stanz-Prägeniet gemäß dem Oberbegriff von Anspruch 1 ist aus der DE-U-297 07 669 bekannt.A punch-emboss rivet according to the preamble of claim 1 is known from DE-U-297 07 669.

Für die Festigkeit der Nietverbindung sind unter anderem zwei Faktoren von Bedeutung. Der erste Faktor besteht darin, daß die Schaftnut insgesamt und ausschließlich mit Material des unteren Werkstücks ausgefüllt werden soll. Der zweite Faktor ist der Winkel, unter welchem der dem Schaftende zugewandte Abschnitt der Schaftnut verläuft. Ideal wäre hier eine Annäherung an einen Winkel von 90°, wodurch jedoch die oben erwähnte Bruchgefahr erheblich erhöht wird. Among other things, two factors are important for the strength of the riveted joint Importance. The first factor is that the shaft groove overall and should only be filled with material from the lower workpiece. The second The factor is the angle at which the section facing the shaft end of the Shaft groove runs. An ideal approach would be to approximate an angle of 90 ° however, the risk of breakage mentioned above is significantly increased.

Es besteht die Aufgabe, den Niet so auszubilden, daß die Festigkeit der Nietverbindung erhöht wird, ohne daß dabei die oben erwähnten Nachteile auftreten.The task is to design the rivet so that the strength of the rivet connection is increased without the disadvantages mentioned above occurring.

Gelöst wird diese Aufgabe mit den Merkmalen des Anspruches 1. Vorteilhafte Ausgestaltungen sind den Unteransprüchen entnehmbar.This problem is solved with the features of claim 1. Advantageous Refinements can be found in the subclaims.

Ein Ausführungsbeispiel wird nachfolgend anhand der Zeichnung näher erläutert, welche einen Schnitt durch die linke Hälfte einer Nietverbindung darstellt.An exemplary embodiment is explained in more detail below with reference to the drawing, which represents a section through the left half of a riveted joint.

Der Stanz-Prägeniet ist in seiner Gesamtheit mit 1 bezeichnet. Die mit ihm hergestellte Nietverbindung verbindet ein oberes Blechteil 2 mit einem unteren Blechteil 3. Der Niet 1 weist einen kegelstumpfförmigen Nietkopf 4 und einen sich daran anschließenden Schaft 5 auf Der Schaft 5 ist mit einer Schaftnut 6 versehen, an welche sich nach unten ein zylindrischer Abschnitt 7 des Schafts 5 anschließt.The stamped embossed rivet is designated 1 in its entirety. The one made with it Rivet connection connects an upper sheet metal part 2 with a lower sheet metal part 3. The rivet 1 has a truncated cone-shaped rivet head 4 and an adjoining one Shank 5 on The shaft 5 is provided with a shaft groove 6, which is downward a cylindrical section 7 of the shaft 5 connects.

Zum Herstellen der Nietverbindung wird der Niet von oben nach unten durch die Blechteile 2, 3 gedrückt, womit in den Blechteilen 2, 3 miteinander fluchtende Stanzlöcher entstehen. Nach Beendigung des Stanzvorgangs wird mittels eines ringförmigen Werkzeugs um den Abschnitt 7 herum eine Nut 8 geprägt, wodurch bewirkt wird, daß Material des unteren Blechs 3 unter plastischer Deformation in die Schaftnut 6 gedrückt wird und diese ausfüllt.To establish the rivet connection, the rivet is passed through from top to bottom Sheet metal parts 2, 3 pressed, which in the sheet metal parts 2, 3 aligned with each other Punch holes are created. After the punching process has been completed, a ring-shaped tool around the section 7 around a groove 8, whereby is caused that material of the lower plate 3 with plastic deformation in the Shaft groove 6 is pressed and fills it.

Diese Schaftnut 6 ist konkav ausgebildet, weist jedoch eine von der Kreisform abweichende Form auf, welche näherungsweise einer Tropfenform entspricht. Dabei verläuft der dem Nietkopf 4 zugewandte Abschnitt 10 der Ringnut 6 unter einem relativ flachen Winkel α zur Achse 11 des Niets 1. Der untere, dem Nietende 9 zugewandte Abschnitt 12 der Ringnut 6 verläuft unter einem Winkel β zur Achse 11, der größer ist als 90°. Die Neigung des Abschnitts 10 entspricht also dem Winkel α, während die Neigung des Abschnitts 12 dem Winkel 180° - β entspricht. Dieser Ergänzungswinkel ist in jedem Fall größer als der Winkel α. This shaft groove 6 is concave, but has a circular shape deviating shape, which approximately corresponds to a drop shape. there The section 10 of the annular groove 6 facing the rivet head 4 runs relatively below one flat angle α to the axis 11 of the rivet 1. The lower end facing the rivet 9 Section 12 of the annular groove 6 extends at an angle β to the axis 11, which is larger than 90 °. The inclination of the section 10 thus corresponds to the angle α, while the Inclination of section 12 corresponds to the angle 180 ° - β. This supplementary angle is in any case larger than the angle α.

Zwischen den beiden Abschnitten 10, 12 weist die Ringnut eine Verrundung 13 auf. Der Übergang zwischen dem Abschnitt 10 und dem Schaft 5 kann ebenfalls verrundet sein, während der Übergang des Abschnitts 12 der Ringnut 6 zum Abschnitt 7 des Schafts 5 scharfkantig ausgebildet sein kann.The annular groove has a rounding 13 between the two sections 10, 12. The Transition between section 10 and shaft 5 can also be rounded, during the transition from section 12 of annular groove 6 to section 7 of shaft 5 can be formed with sharp edges.

Durch den flachen Verlauf des Abschnitts 10 relativ zur Oberfläche des Schafts 5 wird gewährleistet, daß beim Stanzvorgang kein Material vom Blechteil 2 abgeschert wird und in die Nut 6 eindringt. Der relativ steile Verlauf des Abschnitts 12 der Nut 6 ist für die Festigkeit der Nietverbindung von maßgeblichem Einfluß. Der Winkel β ist größer als 90° und je mehr er sich diesem Wert annähert, umso höher ist die sich ergebende Festigkeit der Nietverbindung. Die Grenze des Winkels β wird in erster Linie bestimmt durch die Härte des Materials des Blechs 3. Er sollte so gewählt werden, daß kein Bruch des Nietschafts im Bereich der Nut 6 auftritt.Due to the flat course of the section 10 relative to the surface of the shaft 5 ensures that no material is sheared from the sheet metal part 2 during the punching process and penetrates into the groove 6. The relatively steep course of section 12 of the groove 6 is for the strength of the riveted joint is of decisive influence. The angle β is larger than 90 ° and the more it approaches this value, the higher the resulting one Strength of the riveted joint. The limit of the angle β is primarily determined by the hardness of the material of the sheet 3. It should be chosen so that no breakage of the rivet shaft occurs in the area of the groove 6.

Claims (7)

  1. Self-piercing rivet with a rivet head (4) with the shape of a truncated cone and an adjoining shank (5) which exhibits a groove (6) in the shank, whereby to produce a riveted joint between at least two contiguous components the shank (5) punches through the components forming a punched hole, and then a groove (8) is stamped in the component there around the shank end (9) remote from the rivet head, through which material of the component there penetrates into the groove (6) in the shank through plastic deformation, whereby the groove (6) in the shank is concave, characterised in that the portion (10) of the groove (6) in the shank nearer to the head (4) of the rivet runs at a shallower angle (α) to the axis (11) of the shank than the portion (12) of the groove (6) in the shank nearer to the end (9) of the shank.
  2. Self-piercing rivet according to claim 1, characterised in that the transition between the shank (5) and the portion (10) of the groove (6) in the shank nearer to the head (4) of the rivet is rounded.
  3. Self-piercing rivet according to claim 1 or 2, characterised in that the transition between the shank (5) and the portion (12) of the groove (6) in the shank nearer to the end (9) of the shank is sharp edged.
  4. Self-piercing rivet according to one of claims 1 to 3, characterised in that the transition between the two portions (10, 12) of the groove (6) in the shank is rounded (rounded portion 13).
  5. Self-piercing rivet according to one of claims 1 to 4, characterised in that the portion (10) of the groove (6) in the shank nearer to the head (4) of the rivet is inclined at an angle (α) of approximately 15° to the axis (11) of the shank.
  6. Self-piercing rivet according to one of claims 1 to 5, characterised in that the portion (12) of the groove (6) in the shank nearer to the end (9) of the shank is inclined at an angle (β) of more than 90°.
  7. Self-piercing rivet according to claim 6, characterised in that the angle (β) is approximately 120°.
EP99120398A 1998-12-21 1999-10-13 Self-piercing rivet Expired - Lifetime EP1013945B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29822745U 1998-12-21
DE29822745U DE29822745U1 (en) 1998-12-21 1998-12-21 Stamped embossed rivet

Publications (2)

Publication Number Publication Date
EP1013945A1 EP1013945A1 (en) 2000-06-28
EP1013945B1 true EP1013945B1 (en) 2002-01-16

Family

ID=8066953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99120398A Expired - Lifetime EP1013945B1 (en) 1998-12-21 1999-10-13 Self-piercing rivet

Country Status (8)

Country Link
US (1) US6244808B1 (en)
EP (1) EP1013945B1 (en)
AT (1) ATE212110T1 (en)
CA (1) CA2291948C (en)
DE (2) DE29822745U1 (en)
DK (1) DK1013945T3 (en)
ES (1) ES2170566T3 (en)
PT (1) PT1013945E (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259334C1 (en) * 2002-12-18 2003-12-24 Sfs Intec Holding Ag Heerbrugg Punch rivet for a connection to sheets and method for setting such a punch rivet
DE10259369B3 (en) * 2002-12-18 2004-05-06 Sfs Intec Holding Ag Device to set punch rivet in metal plates has upper sleeve with sliding die, lower stationary die to hold rivet shaft during setting, and enclosing tensioning sleeve to support metal plates
DE10323740B4 (en) * 2003-05-24 2007-05-03 Daimlerchrysler Ag Assembly, with a punch rivet and at least two components to be joined

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29908928U1 (en) * 1999-05-21 2000-10-05 Eibes Kerb Konus Gmbh Stamped embossed rivet
US20060251495A1 (en) * 2001-03-09 2006-11-09 Reinhold Opper Self-piercing rivet, process and device for setting a rivet element, and employment thereof
JP4071634B2 (en) * 2001-03-09 2008-04-02 ニューフレイ リミテッド ライアビリティ カンパニー Automatic drilling rivet, method and apparatus for attaching rivet elements, and use thereof
US20050229374A1 (en) * 2004-04-14 2005-10-20 Franz John P System and method for securing a captive rivet
DE102006013938A1 (en) * 2006-03-17 2007-09-20 Newfrey Llc, Newark Connecting method for two workpieces, involves assigning retaining units to hollow mold, which hold workpiece section inserted into hollow mold, and workpiece section remains in hollow mold
DE202009017864U1 (en) 2009-11-13 2010-08-12 Kerb-Konus-Vertriebs-Gmbh Punching rivet
DE102009044888B4 (en) * 2009-12-14 2013-03-14 Ortwin Hahn Method and tool for mechanically joining at least one lower and one upper mold part by means of a punch rivet
ES2536666T3 (en) * 2010-01-27 2015-05-27 Tox Pressotechnik Gmbh & Co. Kg Connecting element and method for manufacturing a connecting element
WO2012059244A1 (en) 2010-11-03 2012-05-10 Kerb-Konus-Vertriebs-Gmbh Self-piercing engraved rivet
WO2012113463A1 (en) 2011-02-22 2012-08-30 Kerb-Konus-Vertriebs-Gmbh Self-piercing clinch rivet
DE102012202242A1 (en) 2012-02-14 2013-08-14 Airbus Operations Gmbh Method for joining and punching rivet
JP5895648B2 (en) 2012-03-26 2016-03-30 三菱マテリアル株式会社 Replaceable head cutting tool
DE102012011020A1 (en) 2012-06-05 2013-12-05 Newfrey Llc Punch rivet, rivet connection and riveting method
CN203374581U (en) * 2013-06-17 2014-01-01 深圳富泰宏精密工业有限公司 Shell riveting structure
DE102015203608A1 (en) * 2015-02-27 2016-09-01 Ejot Gmbh & Co. Kg Punching connecting element
US10428847B2 (en) * 2015-07-28 2019-10-01 Pem Management, Inc. Tapered head clinch fastener
CN109175194A (en) * 2018-08-20 2019-01-11 广州亨龙智能装备股份有限公司 A kind of plane self-pierce riveting cold extrusion Joining Technology of material multi-layer heterogeneous or of the same race

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DE1252615B (en) 1960-08-04
GB1471666A (en) * 1973-07-19 1977-04-27 Ocean Investments Ltd Method and fastener for use in joining together an assembly of metal sheets
US4130922A (en) * 1977-11-07 1978-12-26 Akh Inc. Headless riveting system
DE3640484A1 (en) 1986-11-27 1988-06-09 Rheinmetall Gmbh Process for securing a shearing pin
US4978270A (en) * 1987-07-31 1990-12-18 Akh, Inc. Headless rivet
US5678970A (en) * 1996-05-02 1997-10-21 Hahn Systems Self-coining fastener
DE29707669U1 (en) * 1997-04-28 1997-07-03 Eibes Kerb Konus Gmbh Punch rivet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259334C1 (en) * 2002-12-18 2003-12-24 Sfs Intec Holding Ag Heerbrugg Punch rivet for a connection to sheets and method for setting such a punch rivet
DE10259369B3 (en) * 2002-12-18 2004-05-06 Sfs Intec Holding Ag Device to set punch rivet in metal plates has upper sleeve with sliding die, lower stationary die to hold rivet shaft during setting, and enclosing tensioning sleeve to support metal plates
DE10323740B4 (en) * 2003-05-24 2007-05-03 Daimlerchrysler Ag Assembly, with a punch rivet and at least two components to be joined

Also Published As

Publication number Publication date
EP1013945A1 (en) 2000-06-28
PT1013945E (en) 2002-05-31
DE29822745U1 (en) 1999-02-18
DE59900622D1 (en) 2002-02-21
ATE212110T1 (en) 2002-02-15
US6244808B1 (en) 2001-06-12
CA2291948A1 (en) 2000-06-21
ES2170566T3 (en) 2002-08-01
DK1013945T3 (en) 2002-03-25
CA2291948C (en) 2003-06-10

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