FR2871861A1 - Sealed rivet especially for fastening thin material has supple seal adhering to rivet and avoiding any need for previous or subsequent operation - Google Patents
Sealed rivet especially for fastening thin material has supple seal adhering to rivet and avoiding any need for previous or subsequent operation Download PDFInfo
- Publication number
- FR2871861A1 FR2871861A1 FR0406691A FR0406691A FR2871861A1 FR 2871861 A1 FR2871861 A1 FR 2871861A1 FR 0406691 A FR0406691 A FR 0406691A FR 0406691 A FR0406691 A FR 0406691A FR 2871861 A1 FR2871861 A1 FR 2871861A1
- Authority
- FR
- France
- Prior art keywords
- rivet
- seal
- head
- barrel
- rivet according
- 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- Withdrawn
Links
- 239000000463 material Substances 0.000 title description 3
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000002966 varnish Substances 0.000 claims abstract 2
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000000806 elastomer Substances 0.000 claims description 7
- 230000007547 defect Effects 0.000 claims description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 5
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 230000001788 irregular Effects 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 238000012800 visualization Methods 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 1
- 230000010339 dilation Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000002203 pretreatment Methods 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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
- F16B33/00—Features common to bolt and nut
- F16B33/004—Sealing; Insulation
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Material Composition (AREA)
Abstract
Description
2871861 -1-2871861 -1-
La présente invention se rapporte aux rivets étanches aux liquides ou aux gaz, notamment à ceux qui servent d'écrous noyés pouvant se poser quand on n'a accès qu'à un seul côté du support à riveter. The present invention relates to liquid or gastight rivets, particularly those which serve as drowned nuts that can be installed when only one side of the support to be riveted is accessible.
Elle concerne également un procédé d'étanchéification de rivet pouvant être exploité dans une large gamme de température ou sur un support présentant d'importants défauts géométriques. Le procédé est apte à mettre en oeuvre le rivet selon l'invention. It also relates to a rivet sealing process that can be operated in a wide temperature range or on a support having significant geometrical defects. The method is suitable for implementing the rivet according to the invention.
Dans ce domaine, on connaît déjà des rivets permettant une certaine étanchéité. Nous distinguons plusieurs procédés pour obtenir cette étanchéité : - utilisation de joint ou manchon rapportés au rivet, illustrée par le brevet n EP 0 589 144 Al; - utilisation d'un brasage, d'un adhésif, d'un mastic ou d'un silicone appliqués avant ou après l'opération de rivetage, la solidification ou polymérisation de l'additif s'achevant par la suite, illustrée par le brevet n EP 1 275 536 Al; utilisation d'un écrasement métal tendre sur un métal plus dur, illustrée par le brevet n WO9429602; - utilisation de rivet en matière plastique, illustrée par le brevet n 95 01669. In this field, we already know rivets for a certain tightness. We distinguish several methods to achieve this seal: - use of seal or sleeve reported to the rivet, illustrated by the patent EP 0 589 144 Al; use of a solder, an adhesive, a putty or a silicone applied before or after the riveting operation, the solidification or polymerization of the additive ending thereafter, illustrated by the patent No. 1,275,536 A1; use of a soft metal crush on a harder metal, illustrated by WO9429602; - Use of plastic rivet, illustrated by the patent No. 95 01669.
Ces diverses méthodes ne sont pas complètement satisfaisantes. These various methods are not completely satisfactory.
En effet, l'ajout d'un élément préformé et non solidaire du rivet rend l'opération de rivetage difficilement mécanisable. Elle nécessite par ailleurs des adaptations géométriques sur les rivets associés pour éviter le fluage du joint une fois comprimé, d'où un surcoût. Indeed, the addition of a preformed element and not secured to the rivet makes the riveting operation difficult to mechanize. It also requires geometric adaptations on the associated rivets to prevent creep of the seal once compressed, resulting in additional cost.
L'application d'un produit de colmatage nécessite une opération 25 supplémentaire plus ou moins importante, préalable à l'utilisation, d'où une productivité très médiocre. The application of a sealing product requires an additional operation more or less important, prior to use, resulting in very poor productivity.
Les étanchéités réalisées par compression d'un métal contre un autre ou l'écrasement de rivet en matière plastique sont rendues défectueuses par la répétition de variations de température même faibles et compensent difficilement les défauts de surface du support, d'où une restriction importante du domaine d'application. Seals made by compressing one metal against another or crushing a plastic rivet are rendered defective by the repetition of even small temperature variations and hardly compensate for surface defects of the support, resulting in a significant restriction of application domain.
La présente invention a pour objet de remédier aux inconvénients des dispositifs actuels et présents, grâce à une conception du rivet très avantageuse. The present invention aims to overcome the disadvantages of current and present devices, thanks to a very advantageous rivet design.
Tout d'abord, l'invention a vaincu le préjugé selon lequel l'étanchéité en 35 périphérie externe du fût (f) du rivet devrait être assurée par l'écrasement du 2871861 -2- matériau constitutif du fût (f) du rivet lui-même ou par celui d'un élément extérieur rapporté. En effet, les joints ou manchons sont éventuellement livrés montés sur le rivet mais ne font jamais partie de la structure même du rivet. Au contraire, l'invention se propose d'utiliser un matériau élastomère appliqué, mise en forme et polymérisé sur le rivet pour qu'il en devienne un élément structurel indissociable. Grâce à ce procédé, l'utilisateur de ces rivets est libéré de toute opération antérieure ou postérieure à celle de rivetage pour obtenir l'étanchéité recherchée sur la périphérie externe du fût (f) du rivet. First of all, the invention overcomes the prejudice that the outer periphery of the rivet shaft (f) should be ensured by the crushing of the material constituting the barrel (f) of the rivet. or by an outer element reported. Indeed, the joints or sleeves are eventually delivered mounted on the rivet but are never part of the actual structure of the rivet. On the contrary, the invention proposes to use an elastomeric material applied, shaped and polymerized on the rivet so that it becomes an inseparable structural element. With this method, the user of these rivets is released from any operation before or after riveting to achieve the desired seal on the outer periphery of the barrel (f) of the rivet.
Les avantages de l'invention sont nombreux, notamment en ce qui concerne la rapidité de mise en oeuvre, la mécanisation, la polyvalence d'utilisation et l'étanchéité réalisée sur la périphérie du rivet obtenue sur un large spectre de température. The advantages of the invention are numerous, particularly as regards the speed of implementation, the mechanization, the versatility of use and the sealing performed on the periphery of the rivet obtained over a wide temperature spectrum.
L'écrasement du rivet entraîne la mise en compression du joint (j) intégré qui vient combler les défauts géométriques du support (s) pour former un rivet étanche aux liquides ou aux gaz. Les jeux mécaniques éventuels sont rattrapés par le joint (j), notamment pour de faibles épaisseurs du support (s). Le support (s) peut être constitué d'une ou plusieurs épaisseurs de matériaux. The crushing of the rivet causes compression of the joint (j) integrated which fills the geometrical defects of the support (s) to form a rivet impervious to liquids or gases. The potential mechanical games are caught by the seal (j), especially for small thicknesses of the support (s). The support (s) may consist of one or more thicknesses of materials.
La présente invention concerne un rivet tubulaire taraudé ou lisse, borgne ou débouchant, comprenant un fût (f) cylindrique et prolongé par une tête (t) faisant saillie radialement à la paroi latérale extérieure du fût (f), et un joint (j) d'étanchéité souple fixé sous la tête (t), qui a le même axe que le fût (f). Ce joint (j) adhère exclusivement à la tête (t) ou au fût (f) du rivet. The present invention relates to a tapped or smooth tubular rivet, blind or opening, comprising a barrel (f) cylindrical and extended by a head (t) projecting radially from the outer side wall of the barrel (f), and a seal (j) flexible seal fixed under the head (t), which has the same axis as the barrel (f). This seal (j) adheres exclusively to the head (t) or the barrel (f) of the rivet.
Le joint (j) est formé d'un élastomère tel qu'un silicone, un polyuréthane ou un caoutchouc déposé à l'état non polymérisé sous la tête (t) du rivet. L'opération de polymérisation est achevée avant l'utilisation dudit rivet. The seal (j) is formed of an elastomer such as a silicone, a polyurethane or a rubber deposited in the uncured state under the head (t) of the rivet. The polymerization operation is completed before the use of said rivet.
La surface du rivet peut faire l'objet de traitements préalables pour accroître l'adhérence du joint (j). Ainsi des attaques chimiques ou mécaniques ou l'application d'un vernis d'accrochage ou tout autre procédé destiné à améliorer l'accrochage peuvent être utilisés. The surface of the rivet can be pretreated to increase the adhesion of the seal (j). Thus chemical or mechanical attacks or the application of a tack coat or any other method for improving the attachment can be used.
Le joint (j) couvre de façon circonférentielle les longueurs (dl) et (d2) ; (dl) couvrant totalement ou en partie le dessous de la tête (t), (d2) partant de la tête (t) vers l'extrémité du fût (f) sur une longueur de 0 à 5 fois la longueur (dl). The seal (j) circumferentially covers the lengths (d1) and (d2); (dl) totally or partially covering the underside of the head (t), (d2) from the head (t) towards the end of the barrel (f) over a length of 0 to 5 times the length (dl).
Le profil du joint (j) raccordant ses deux bordures opposées peut aller du convexe au concave. The profile of the joint (j) connecting its two opposite edges can go from convex to concave.
2871861 -3- Ainsi, le joint (j) vient combler l'espace entre la tête (t) et le support (s), et peut aller jusqu'à combler l'orifice pratiqué dans le support (s). Cette performance permet de combler des orifices irréguliers ou qui ne seraient pas ajustés au diamètre du fût (f) du rivet. 2871861 -3- Thus, the seal (j) fills the space between the head (t) and the support (s), and can go as close as the hole made in the support (s). This performance makes it possible to fill irregular holes or that would not be adjusted to the diameter of the barrel (f) of the rivet.
Le joint (j) est souple et élastique, permettant de combler les défauts géométriques du support (s), tels que rayures, voilage, perforation irrégulière, et de compenser les dilatations différentielles entre rivet et support (s). The seal (j) is flexible and elastic, to fill the geometric defects of the support (s), such as scratches, sheers, irregular perforation, and compensate for differential expansion between rivet and support (s).
La visualisation du fluage du joint (j) sous la tête est facilitée par la teinte contrastée du joint (j) par rapport à la tête (t) ; ceci permet de vérifier l'intégrité du 10 joint (j) : fluage homogène, absence de coupure, ... The visualization of the creep of the seal (j) under the head is facilitated by the contrasting hue of the seal (j) with respect to the head (t); this makes it possible to check the integrity of the joint (j): homogeneous creep, absence of cutoff, etc.
Ainsi, le fluage du joint (j) sert d'indicateur visuel lors de la dépose ou de témoin de contrôle à travers le temps. Thus, the creep of the seal (j) serves as a visual indicator during the removal or control witness over time.
La présente invention s'adresse aux rivets borgnes ou débouchants, présentant une paroi intérieure du fût (f) taraudée ou lisse. The present invention is directed to blind or through rivets, having an inner wall of the barrel (f) threaded or smooth.
La figure 1 représente le dispositif de l'invention. Figure 1 shows the device of the invention.
La figure 2 représente, en coupe, une variante de ce dispositif. Figure 2 shows, in section, a variant of this device.
L'invention pourra se présenter sous les différents modes de réalisation énoncés ci-après: - la substance d'étanchéité est du silicone; - la substance d'étanchéité présente une adhérence suffisante pour ne pas se décoller sous l'effort de compression; - la substance d'étanchéité couvrira préférentiellement la totalité de la surface inférieure de la tête (t) ainsi qu'une partie du fût (f) ; - la substance d'étanchéité conserve ses propriétés élastiques sur une large plage de température. The invention may be in the various embodiments set out below: the sealing substance is silicone; the sealing substance has a sufficient adhesion so as not to peel off under the compression force; - The sealing substance will preferably cover the entire lower surface of the head (t) and a portion of the barrel (f); the sealing substance retains its elastic properties over a wide temperature range.
L'invention concerne également un procédé de dépose d'un joint (j) sur un rivet tubulaire greffé caractérisé par le fait qu'il consiste: - à effectuer un éventuel prétraitement de surface au rivet pour améliorer les performances d'accrochage de l'élastomère; - à déposer par pistolage, tamponnage ou tout autre procédé adapté, l'élastomère non polymérisé dans les zones sélectionnées; - à activer la polymérisation de l'élastomère. The invention also relates to a method of depositing a seal (j) on a grafted tubular rivet characterized in that it consists in: - performing a possible pretreatment of the rivet surface to improve the gripping performance of the elastomer; - Spraying, buffering or any other suitable method, the uncured elastomer in the selected areas; to activate the polymerization of the elastomer.
2871861 -4-2871861 -4-
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0406691A FR2871861A1 (en) | 2004-06-21 | 2004-06-21 | Sealed rivet especially for fastening thin material has supple seal adhering to rivet and avoiding any need for previous or subsequent operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0406691A FR2871861A1 (en) | 2004-06-21 | 2004-06-21 | Sealed rivet especially for fastening thin material has supple seal adhering to rivet and avoiding any need for previous or subsequent operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2871861A1 true FR2871861A1 (en) | 2005-12-23 |
Family
ID=34946681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0406691A Withdrawn FR2871861A1 (en) | 2004-06-21 | 2004-06-21 | Sealed rivet especially for fastening thin material has supple seal adhering to rivet and avoiding any need for previous or subsequent operation |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2871861A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2995372A1 (en) * | 2012-09-13 | 2014-03-14 | Lisi Aerospace | FIXING DEVICE |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3639137A (en) * | 1969-10-09 | 1972-02-01 | Ncr Co | Metal fastening coated with pressure-activatable encapsulated sealant system |
| EP0589144A1 (en) * | 1992-09-23 | 1994-03-30 | GESELLSCHAFT FÜR BEFESTIGUNGSTECHNIK GEBR. TITGEMEYER GmbH & CO. KG. | Rivet connection |
| US5304023A (en) * | 1992-10-23 | 1994-04-19 | Metaltite Corporation | Metal panel fastener |
| WO1994029602A1 (en) * | 1993-06-16 | 1994-12-22 | Lindab Ab | Self-drilling blind rivet and method for making a pressure-tight riveted joint by means of same |
| EP1275536A1 (en) * | 2001-07-10 | 2003-01-15 | DENSO THERMAL SYSTEMS S.p.A. | Method for fixing components to a pipe for circulation of a fluid forming part of a heat exchanger, in particular a condenser of an air-conditioning system |
-
2004
- 2004-06-21 FR FR0406691A patent/FR2871861A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3639137A (en) * | 1969-10-09 | 1972-02-01 | Ncr Co | Metal fastening coated with pressure-activatable encapsulated sealant system |
| EP0589144A1 (en) * | 1992-09-23 | 1994-03-30 | GESELLSCHAFT FÜR BEFESTIGUNGSTECHNIK GEBR. TITGEMEYER GmbH & CO. KG. | Rivet connection |
| US5304023A (en) * | 1992-10-23 | 1994-04-19 | Metaltite Corporation | Metal panel fastener |
| WO1994029602A1 (en) * | 1993-06-16 | 1994-12-22 | Lindab Ab | Self-drilling blind rivet and method for making a pressure-tight riveted joint by means of same |
| EP1275536A1 (en) * | 2001-07-10 | 2003-01-15 | DENSO THERMAL SYSTEMS S.p.A. | Method for fixing components to a pipe for circulation of a fluid forming part of a heat exchanger, in particular a condenser of an air-conditioning system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2995372A1 (en) * | 2012-09-13 | 2014-03-14 | Lisi Aerospace | FIXING DEVICE |
| EP2708761A1 (en) * | 2012-09-13 | 2014-03-19 | LISI Aerospace | Attachment device |
| CN103671394A (en) * | 2012-09-13 | 2014-03-26 | Lisi航空 | Fastening device |
| US9644657B2 (en) | 2012-09-13 | 2017-05-09 | Lisi Aerospace | Fastening device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20150227 |