EP3368777A1 - Self-piercing rivet with high mechanical strength against tearing out and shearing - Google Patents

Self-piercing rivet with high mechanical strength against tearing out and shearing

Info

Publication number
EP3368777A1
EP3368777A1 EP16809900.0A EP16809900A EP3368777A1 EP 3368777 A1 EP3368777 A1 EP 3368777A1 EP 16809900 A EP16809900 A EP 16809900A EP 3368777 A1 EP3368777 A1 EP 3368777A1
Authority
EP
European Patent Office
Prior art keywords
rivet
piercing
rod
self
flange
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Withdrawn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
EP16809900.0A
Other languages
German (de)
French (fr)
Inventor
Mathieu Cochard
Jonathan FENOLL
Yves-Marie DEPAIL
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.)
A Raymond SARL
Original Assignee
A Raymond SARL
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 A Raymond SARL filed Critical A Raymond SARL
Publication of EP3368777A1 publication Critical patent/EP3368777A1/en
Withdrawn legal-status Critical Current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
    • F16B19/083—Self-drilling 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
    • 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
    • F16B19/086—Self-piercing 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
    • 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
    • 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

Definitions

  • the invention relates to a self-piercing rivet comprising a support flange and a piercing end, with between the flange and the piercing end a radially expandable hollow tubular hollow body extending axially, the tubular body comprising a first cylindrical part. adjacent to the flange and a second cylindrical portion adjacent to the piercing end, and a third barrel-shaped expandable portion between the first and second cylindrical portions, the rivet further comprises a shaft axially extending into the hollow body .
  • the ankle body comprises a threaded portion adapted to cooperate with the thread of a screw.
  • these types of self-drilling anchors do not satisfy the manufacturers because they have low shear strengths and tearing, especially in case of shock.
  • Patent document FR2868818 discloses a self-drilling ankle with an ankle body which comprises a inner sleeve receiving a tool for rotating the ankle body and then in traction by axial translation of the pin body to radially deform the ankle body. Nevertheless, after removal of the tool, a passage hole of the tool is left vacant, not allowing to strengthen the structure of the self-drilling dowel optimally to improve the mechanical strength.
  • the manufacturers seek to accelerate the rate for the assembly of two plates, and more particularly when the fixing is made with access to only one side of the plates to be assembled.
  • the object of the invention is to propose another type of rivet having a better resistance to tearing and shearing while being compatible to the constraints of the automotive industry.
  • the subject of the invention is a self-piercing rivet comprising a support flange and a piercing end, with between the flange and the piercing end a radially expansible hollow tubular body which extends axially, the body tubular comprising a first cylindrical portion adjacent to the flange and a second cylindrical portion adjacent to the piercing end, and a third expandable barrel-shaped portion between the first and second cylindrical portions, the rivet further comprises a stem which extends axially in the hollow body, the rod cooperating with the hollow body to drive it in axial rotation and to deform it radially at the level of the third expandable part under the effect of axial traction, the rod comprising a breakable zone arranged flush with the flange when the third part of the body is completely expanded radially, characterized in that the third part the expandable portion of the tubular body comprises slots and strips interposed between the slots, an annular weakening zone in a median transverse plane, and that the third portion is adapted to
  • the self-piercing rivet according to the invention can still have the following particularities:
  • the strips may have an abrasive outer surface to produce the effect of abrasion or deburring; the strips may have a sharp beveled side edge to produce the abrasion or deburring effect;
  • the rod may comprise at one end a first portion which extends into the first portion of the hollow body and which projects beyond the collar to the outside of the body;
  • the rod may comprise at the other end a second portion arranged to be housed partly in the second part of the body so as to be locked axially in the body;
  • the rod may comprise a third rod portion between the first and second rod portions with the breakable zone, the third rod portion is arranged such that a portion of the third rod portion is inserted into the first portion of the rod; body when the third part of the body is completely expanded radially;
  • the first part of the tubular body may have an inner surface provided with claws for locking in axial translation the rod;
  • the rod can be fixed to the second part of the tubular body by a tongue / notch system
  • the rod can be fixed to the second part of the tubular body by welding
  • the piercing end can be in the form of a hole saw
  • the rivet may be of rolled and welded sheet
  • the rivet can be stamped sheet.
  • the self-piercing rivet With the self-piercing rivet according to the invention, it is possible to assemble quickly and easily two plates between them, or a piece to a support.
  • the plates can also be automotive floor mats.
  • the collar bears against the element superior to assemble.
  • Axial traction on the tool then causes the radial expansion of the rivet body to anchor the rivet to the plates.
  • the third stem portion is partially blocked in the first portion of the body adjacent to the collar, thereby providing a reinforcement completely filling the rivet body at the first portion of the body for solidify the structure of the expanded rivet.
  • the axial traction exerted on the rod causes the breaking of the rod for a suitable traction value at the breakable zone so that the broken rod does not exceed the flange.
  • the assembly of two plates comprising the steps of drilling and anchoring the rivet on both sides of the two plates, can be fast and simplified because it can be achieved in a single operation with a suitable screwing / pulling tool .
  • the expanded rivet body with a remaining rod portion in the body provides sealing from one side to the other of the assembled plates.
  • the arrangement of the piercing end and the hollow tubular body with its third part designed to produce an abrasion or deburring effect of the peripheral edge of the drilled hole allows for "clean" holes, but also to contain the release of dust and the drilling debris in the piercing end.
  • Figure 1 is a perspective view of the self- piercing rivet according to the invention.
  • FIG. 2 is a plan view of the self- piercing rivet according to the invention.
  • Figure 3 is a side view of the self- piercing rivet according to the invention.
  • Figure 4 is an axial sectional view of the self-piercing rivet of Figure 3 according to the invention.
  • Figure 5 is an axial sectional view of the radially expanded self-piercing rivet according to the invention.
  • Figures 1 to 5 illustrate a rivet 1 according to the invention for assembling two plates (P and P 'shown in Figure 5).
  • the plates may be fiberglass.
  • the rivet 1 comprises a flange 2 bearing, for example, on one of the plates to be assembled, and a piercing end 3.
  • the flange 2 extends in a plane perpendicular to an axis AA of the rivet 1.
  • the collar 2 may have notches (not shown) coming to bite the bearing surface to block its axial rotation.
  • the piercing end 3 is here circular bell saw type with a two-stage toothing.
  • the hole saw has an internal bore with the teeth circumferentially distributed around the bore to reduce dust and tearing of the fiber during drilling.
  • the drilling end could be drill bit type with a diamond coating (not shown).
  • the rivet 1 has a tubular body 4 in the shape of a barrel or barrel.
  • the body 4 comprises a divisible bore in three parts extending along the axis AA: a first cylindrical portion adjacent to the flange 2, a second cylindrical portion 6 adjacent to the piercing end 3, and a third intermediate portion 7 between the two parts 5, 6 cylindrical, which is here in the form of radially expandable shaft.
  • the third intermediate portion 7 comprises longitudinal anchoring slots 8 extending parallel to the axis AA between two eyelets 9, 10 pierced at the two ends of the third expansible intermediate portion.
  • the lower strips 11 here have an abrasive outer surface.
  • the upper strips 12 may also have an abrasive outer surface.
  • the inner surface of the first portion 5 of the body 4 adjacent to the flange 2 here has claws 17 inclined towards the inside of the bore of the body 4.
  • FIG. 2 shows a view from above of the rivet 1.
  • the collar 2 has cutouts around an inlet orifice of the bore of the body 4.
  • a rod 14, here globally cylindrical, whose structure is visible in Figure 4, is inserted into the bore of the body 4 rivet. It comprises three parts extending along the axis AA: a first part 18 at one end of the rod 14 intended to be inserted in the first part 5 of the body 4 and whose length is adapted so that it projects also beyond the flange 2 on the outside of the rivet body 4; a second portion 19 at the other end of the rod 14 intended to be partially housed in the second portion 6 of the rivet body 2; and a third portion 20, between the first and second parts 18, 19 of rod 14 which is housed in the third portion 7 of the rivet body 4.
  • the protruding portion of the first portion 18 of the rod 14 relative to the rivet body 4 will be used to driving the rivet 1 in rotation in the conventional direction of screwing, by action of a tool with this part extending outside the body 4, but also in axial tension.
  • the second part 19 of the rod 14 serves to join in axial rotation the rod 14 to the second portion 6 of the rivet body 4, here illustrated by a fastening system of the tongue / notch type 16.
  • the solidarity could also be done by welding or crimping the rod 14 to the body 4.
  • the third rod portion 14 here has a radial narrowing zone corresponding to a breakable zone 21.
  • the rod 14 completely fills the bore of the rivet body 4 from the second portion 6 of the body 4 in the direction of the flange 2.
  • the rod 14 thus makes it possible to ensure a tightness of a next to the other elements to assemble.
  • the establishment of the rivet 1, here in the two plates P, P 'to assemble them, is effected by driving the rivet 1 in rotation in the conventional direction of screwing, by action of the screwing tool / traction on the first portion 18 of the rod 14 projecting from the body 4, to make a hole in the two plates P and P 'of Figure 5.
  • the tool When the flange 2 abuts against the upper plate P to be assembled, the tool is operated with traction in axial translation on the rod 14 so that the second portion 6 of the body 4 approaches the collar 2 which causes the radial deformation of the third expansible part 7 of the rivet body 4, the lower strips 11 and 12 being wider apart obliquely of the axis AA of the rivet 1 by opening the anchoring slots 8, until the strips 11 and 12 form a bead under the plates P, P 'assembled.
  • the third part 7 being completely expanded, as illustrated in FIG. 5, a portion of the third part 20 of rod 14 is then inserted in the first part 5 of the body 4 where it is locked axially by the claws 17 arranged on the internal face of the first portion 5 of the body 4.
  • the inclined claws 17 dig into the material of the stem 14 by withdrawal in the case of removal of the rod 14 of the first portion 5 of the body 4.
  • the breakable zone 21 on the third rod portion 14 is arranged so that after assembly of the elements, the breaking of the rod 14 by traction exerted on the rod 14 does not leave the portion of the third rod portion 14 remaining. in the rivet body 4 extend beyond the rivet body 4, and that the broken rod 14 comes flush with the flange 2.
  • the third intermediate part 7 formed by the slots 8 and the strips 11, 12 is designed, before its radial deformation, to produce an abrasion or deburring effect on the peripheral edge of the hole, when this third part 7 passes through this hole after passing through the hole by the piercing end 3 of the rivet 1 according to the invention.
  • This abrasion or deburring function can be filled by the outer surface of the strips 11, 12 which can be roughened. It can still be filled by the side edge or edges of the strips 11, 12 which are bevelled to be sharp.
  • the strips 11, 12 allow sanding the inside of the hole to remove protruding fibers and / or locally delaminated areas, so as to obtain a clean and clean surface all around the hole.
  • the rivet 1 with the rod 14 may be rolled sheet and welded, or stamped sheet.
  • the rivet 1 can also be made completely by plastic molding or injection of plastic material to be manufactured at low cost and used to assemble two automotive floor mats, or a floor mat to a plate for example.
  • the rivet 1 could also be used for fixing cable passages, used to position heavy or light fastening systems, or for the internal fixation for cars with metal or composite box.

Landscapes

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

Abstract

A self-piercing rivet (1) comprising a support flange (2) and a piercing end (3), and having, between the flange (2) and the piercing end (3), an expandable hollow tubular body (4) that extends axially, the body comprising a first cylindrical part (5) adjacent to the flange (2) and a second cylindrical part (6) adjacent to the piercing end (3), and a third radially expandable part (7) between the first and second cylindrical parts (5, 6), the rivet (1) further comprising a breakable rod (14) that extends axially into the hollow body (4) for rotating the body axially and for deforming same radially at the third expandable part (7) under the effect of axial traction. The third part (7) of the body (4) is designed to produce an abrasive or deburring effect, prior to the radial deformation of same, on the peripheral edge of a hole pierced by the piercing end (3).

Description

RIVET AUTO-PERCEUR A HAUTE RESISTANCE MECANIQUE A L' ARRACHEMENT ET AU CISAILLEMENT  SELF-DRILLING RIVET WITH HIGH MECHANICAL RESISTANCE TO ARRACTION AND SHEAR
Domaine technique Technical area
L'invention concerne un rivet auto-perceur comprenant une collerette d'appui et une extrémité de perçage, avec entre la collerette et l'extrémité de perçage un corps tubulaire creux expansible radialement s 'étendant axialement, le corps tubulaire comprenant une première partie cylindrique adjacente à la collerette et une seconde partie cylindrique adjacente à l'extrémité de perçage, et une troisième partie expansible en forme de fût entre les première et seconde parties cylindriques, le rivet comprend en outre une tige qui s'étend axialement dans le corps creux.  The invention relates to a self-piercing rivet comprising a support flange and a piercing end, with between the flange and the piercing end a radially expandable hollow tubular hollow body extending axially, the tubular body comprising a first cylindrical part. adjacent to the flange and a second cylindrical portion adjacent to the piercing end, and a third barrel-shaped expandable portion between the first and second cylindrical portions, the rivet further comprises a shaft axially extending into the hollow body .
Technique antérieure Prior art
II est connu d'utiliser une cheville auto-foreuse à expansion pour assembler de manière simple deux éléments comme une pièce à un support .  It is known to use an expansion self-drilling dowel to simply assemble two elements such as a part to a support.
Les documents FR2927382 et FR2992698 décrivent des chevilles auto-foreuses avec une tête sous forme de collerette, une extrémité de perçage et un corps de cheville entre la collerette et l'extrémité de perçage. Documents FR2927382 and FR2992698 disclose self-drilling dowels with a flanged head, a piercing end and a dowel body between the flange and the piercing end.
Le corps de cheville comprend une partie taraudée apte à coopérer avec le filet d'une vis. Néanmoins, dans l'industrie automobile ces types de chevilles auto- foreuses ne satisfont pas les constructeurs car elles présentent des résistances faibles au cisaillement et à l'arrachement, surtout en cas de choc. The ankle body comprises a threaded portion adapted to cooperate with the thread of a screw. However, in the automotive industry these types of self-drilling anchors do not satisfy the manufacturers because they have low shear strengths and tearing, especially in case of shock.
Le document de brevet FR2868818 décrit une cheville auto-foreuse avec un corps de cheville qui comporte un fourreau interne de réception d'un outil d'entraînement en rotation du corps de cheville puis en traction par translation axiale du corps de cheville pour déformer radialement le corps de cheville. Néanmoins, après retrait de l'outil, un orifice de passage de l'outil est laissé vacant, ne permettant pas de renforcer de façon optimum la structure de la cheville auto-foreuse pour améliorer la résistance mécanique. Patent document FR2868818 discloses a self-drilling ankle with an ankle body which comprises a inner sleeve receiving a tool for rotating the ankle body and then in traction by axial translation of the pin body to radially deform the ankle body. Nevertheless, after removal of the tool, a passage hole of the tool is left vacant, not allowing to strengthen the structure of the self-drilling dowel optimally to improve the mechanical strength.
Le document US4293258 et US3935786 décrivent des rivets auto-perceurs avec un corps creux dans lequel s'étend axialement une tige d'entraînement du rivet en rotation. Néanmoins, après perçage, ces rivets présentent encore des faiblesses au niveau de leur résistance mécanique .  US4293258 and US3935786 disclose self-piercing rivets with a hollow body in which axially extends a drive shaft of the rotating rivet. Nevertheless, after drilling, these rivets still have weaknesses in their mechanical strength.
Les documents WO8805991, US 3403593 et KR 20150065099 décrivent des rivets auto-perceurs à tige sécable agencée dans le corps de rivet.  The documents WO8805991, US 3403593 and KR 20150065099 disclose self-piercing rivets with breakable rods arranged in the rivet body.
Néanmoins, lorsque ces rivets sont utilisés pour percer des éléments composites, ces chevilles ou rivets ne permettent pas de faire des trous « propres » car ils induisent souvent un arrachement de fibres et du délaminage lors du perçage, en plus d'un dégagement de poussière non maîtrisé.  Nevertheless, when these rivets are used to pierce composite elements, these dowels or rivets do not allow to make "clean" holes because they often induce a tearing of fibers and delamination during drilling, in addition to a release of dust not mastered.
Enfin, les constructeurs cherchent à accélérer la cadence pour l'assemblage de deux plaques, et plus particulièrement lorsque la fixation est faite avec un accès à un seul coté des plaques à assembler.  Finally, the manufacturers seek to accelerate the rate for the assembly of two plates, and more particularly when the fixing is made with access to only one side of the plates to be assembled.
Exposé de l'invention Presentation of the invention
Le but de l'invention est de proposer un autre type de rivet présentant une meilleure résistance à l'arrachement et au cisaillement tout en étant compatible aux contraintes de l'industrie automobile. The object of the invention is to propose another type of rivet having a better resistance to tearing and shearing while being compatible to the constraints of the automotive industry.
Plus particulièrement, l'invention a pour objet un rivet auto-perceur comprenant une collerette d'appui et une extrémité de perçage, avec entre la collerette et l'extrémité de perçage un corps tubulaire creux expansible radialement qui s'étend axialement, le corps tubulaire comprenant une première partie cylindrique adjacente à la collerette et une seconde partie cylindrique adjacente à l'extrémité de perçage, et une troisième partie expansible en forme de fût entre les première et seconde parties cylindriques, le rivet comprend en outre une tige qui s'étend axialement dans le corps creux, la tige coopérant avec le corps creux pour l'entraîner en rotation axiale et pour le déformer radialement au niveau de la troisième partie expansible sous l'effet d'une traction axiale, la tige comportant une zone sécable disposée en affleurement avec la collerette lorsque la troisième partie du corps est complètement expansée radialement, caractérisé en ce que la troisième partie expansible du corps tubulaire comprend des fentes et des bandelettes intercalées entre les fentes, une zone annulaire d'affaiblissement dans un plan transversal médian, et en ce que la troisième partie est conçue pour produire un effet d'abrasion ou d'ébavurage, avant sa déformation radiale, sur le bord périphérique d'un trou percé par l'extrémité de perçage.  More particularly, the subject of the invention is a self-piercing rivet comprising a support flange and a piercing end, with between the flange and the piercing end a radially expansible hollow tubular body which extends axially, the body tubular comprising a first cylindrical portion adjacent to the flange and a second cylindrical portion adjacent to the piercing end, and a third expandable barrel-shaped portion between the first and second cylindrical portions, the rivet further comprises a stem which extends axially in the hollow body, the rod cooperating with the hollow body to drive it in axial rotation and to deform it radially at the level of the third expandable part under the effect of axial traction, the rod comprising a breakable zone arranged flush with the flange when the third part of the body is completely expanded radially, characterized in that the third part the expandable portion of the tubular body comprises slots and strips interposed between the slots, an annular weakening zone in a median transverse plane, and that the third portion is adapted to produce an abrasion or deburring effect, before its radial deformation, on the peripheral edge of a hole drilled by the piercing end.
Le rivet auto-perceur selon l'invention peut encore présenter les particularités suivantes :  The self-piercing rivet according to the invention can still have the following particularities:
les bandelettes peuvent avoir une surface extérieure abrasive pour produire l'effet d'abrasion ou d'ébavurage ; les bandelettes peuvent avoir un bord latéral biseauté tranchant pour produire l'effet d'abrasion ou d'ébavurage ; the strips may have an abrasive outer surface to produce the effect of abrasion or deburring; the strips may have a sharp beveled side edge to produce the abrasion or deburring effect;
- la tige peut comprendre à une extrémité une première partie qui s'étend dans la première partie du corps creux et qui se projette au-delà de la collerette à l'extérieur du corps ;  - The rod may comprise at one end a first portion which extends into the first portion of the hollow body and which projects beyond the collar to the outside of the body;
- la tige peut comprendre à l'autre extrémité une seconde partie agencée pour se loger en partie dans la seconde partie du corps de sorte à être bloquée axialement dans le corps ;  - The rod may comprise at the other end a second portion arranged to be housed partly in the second part of the body so as to be locked axially in the body;
- la tige peut comprendre une troisième partie de tige entre les première et seconde parties de tige avec la zone sécable, la troisième partie de tige est agencée de sorte qu'une portion de la troisième partie de tige s'insère dans la première partie du corps quand la troisième partie du corps est complètement expansée radialement ;  the rod may comprise a third rod portion between the first and second rod portions with the breakable zone, the third rod portion is arranged such that a portion of the third rod portion is inserted into the first portion of the rod; body when the third part of the body is completely expanded radially;
- la première partie du corps tubulaire peut avoir une surface intérieure pourvue de griffes pour bloquer en translation axiale la tige ;  - The first part of the tubular body may have an inner surface provided with claws for locking in axial translation the rod;
- la tige peut être fixée à la seconde partie du corps tubulaire par un système languette / encoche ;  the rod can be fixed to the second part of the tubular body by a tongue / notch system;
- la tige peut être fixée à la seconde partie du corps tubulaire par soudage ;  the rod can be fixed to the second part of the tubular body by welding;
- l'extrémité de perçage peut se présenter sous la forme d'une scie cloche ;  the piercing end can be in the form of a hole saw;
-le rivet peut être en tôle roulée et soudée ;  the rivet may be of rolled and welded sheet;
- le rivet peut être en tôle emboutie.  - The rivet can be stamped sheet.
Avec le rivet auto-perceur selon l'invention, il est possible d'assembler rapidement et facilement deux plaques entre elles, ou une pièce à un support. Les plaques peuvent être aussi des tapis de sol automobile. With the self-piercing rivet according to the invention, it is possible to assemble quickly and easily two plates between them, or a piece to a support. The plates can also be automotive floor mats.
Avec cet agencement selon l'invention, on peut obtenir une fixation présentant une haute résistance à l'arrachement et au cisaillement supérieure à 750daN.  With this arrangement according to the invention, it is possible to obtain a fastening having a high resistance to tearing and shearing greater than 750daN.
En effet, après perçage des éléments à assembler par la mise en rotation du rivet à travers un outil de vissage coopérant avec la tige insérée dans le corps creux et en saillie par rapport au corps de rivet, la collerette vient en appui contre l'élément supérieur à assembler. Une traction axiale sur l'outil entraine alors l'expansion radiale du corps de rivet pour ancrer le rivet aux plaques. Quand le corps de rivet est complètement expansé radialement, la troisième partie de tige se retrouve bloquée en partie dans la première partie du corps adjacente à la collerette, réalisant alors un renfort remplissant entièrement le corps de rivet au niveau de la première partie du corps pour solidifier la structure du rivet expansé. De plus, après assemblage des plaques, la traction axiale exercée sur la tige entraîne la rupture de la tige pour une valeur de traction appropriée au niveau de la zone sécable de sorte que la tige cassée ne dépasse pas la collerette.  Indeed, after drilling the elements to be assembled by rotating the rivet through a screwing tool cooperating with the rod inserted into the hollow body and projecting from the rivet body, the collar bears against the element superior to assemble. Axial traction on the tool then causes the radial expansion of the rivet body to anchor the rivet to the plates. When the rivet body is completely expanded radially, the third stem portion is partially blocked in the first portion of the body adjacent to the collar, thereby providing a reinforcement completely filling the rivet body at the first portion of the body for solidify the structure of the expanded rivet. In addition, after assembly of the plates, the axial traction exerted on the rod causes the breaking of the rod for a suitable traction value at the breakable zone so that the broken rod does not exceed the flange.
L'assemblage de deux plaques, comprenant les étapes de perçage et d'ancrage du rivet de part et d'autre des deux plaques, peut être rapide et simplifié car il peut être réalisé en une seule opération avec un outil de vissage/traction adapté.  The assembly of two plates, comprising the steps of drilling and anchoring the rivet on both sides of the two plates, can be fast and simplified because it can be achieved in a single operation with a suitable screwing / pulling tool .
Le corps de rivet expansé avec une portion de tige restante dans le corps permet d'assurer l'étanchéité d'un coté à l'autre des plaques assemblées. De plus, l'agencement de l'extrémité de perçage et du corps tubulaire creux avec sa troisième partie conçue pour produire un effet d'abrasion ou d'ébavurage du bord périphérique du trou percé, permet de réaliser des trous « propres », mais aussi de contenir le dégagement de poussière et les débris de perçage dans l'extrémité de perçage . The expanded rivet body with a remaining rod portion in the body provides sealing from one side to the other of the assembled plates. In addition, the arrangement of the piercing end and the hollow tubular body with its third part designed to produce an abrasion or deburring effect of the peripheral edge of the drilled hole, allows for "clean" holes, but also to contain the release of dust and the drilling debris in the piercing end.
Présentation sommaire des dessins Brief presentation of the drawings
La présente invention sera mieux comprise et d'autres avantages apparaîtront à la lecture de la description qui suit et des dessins annexés dans lesquels :  The present invention will be better understood and other advantages will appear on reading the description which follows and the appended drawings in which:
la figure 1 est une vue en perspective du rivet auto¬ perceur selon l'invention ; Figure 1 is a perspective view of the self- piercing rivet according to the invention;
- la figure 2 est une vue de dessus du rivet auto¬ perceur selon l'invention ; FIG. 2 is a plan view of the self- piercing rivet according to the invention;
la figure 3 est une vue de profil du rivet auto¬ perceur selon l'invention ; Figure 3 is a side view of the self- piercing rivet according to the invention;
la figure 4 est une vue en coupe axiale du rivet auto-perceur de la figure 3 selon l'invention ;  Figure 4 is an axial sectional view of the self-piercing rivet of Figure 3 according to the invention;
la figure 5 est une vue en coupe axiale du rivet auto-perceur expansé radialement selon l'invention.  Figure 5 is an axial sectional view of the radially expanded self-piercing rivet according to the invention.
Description d'un mode de réalisation Description of an embodiment
Les figures 1 à 5 illustrent un rivet 1 selon l'invention, pour assembler deux plaques (P et P' représentées sur la figure 5) . A titre d'exemple non limitatif, les plaques peuvent être en fibre de verre.  Figures 1 to 5 illustrate a rivet 1 according to the invention for assembling two plates (P and P 'shown in Figure 5). By way of non-limiting example, the plates may be fiberglass.
Le rivet 1 comprend une collerette 2, venant en appui par exemple sur l'une des plaques à assembler, et une extrémité de perçage 3. La collerette 2 s'étend dans un plan perpendiculaire à un axe AA du rivet 1. La collerette 2 peut présenter des crans (non représentés) venant mordre la surface d'appui pour bloquer sa rotation axiale. The rivet 1 comprises a flange 2 bearing, for example, on one of the plates to be assembled, and a piercing end 3. The flange 2 extends in a plane perpendicular to an axis AA of the rivet 1. The collar 2 may have notches (not shown) coming to bite the bearing surface to block its axial rotation.
L'extrémité de perçage 3 est ici de type scie cloche circulaire avec une denture à deux étages. La scie cloche comporte un alésage interne avec les dents réparties circonférentiellement autour de l'alésage pour diminuer la poussière et l'arrachement de fibre lors du perçage.  The piercing end 3 is here circular bell saw type with a two-stage toothing. The hole saw has an internal bore with the teeth circumferentially distributed around the bore to reduce dust and tearing of the fiber during drilling.
Sans sortir du cadre de l'invention, l'extrémité de perçage pourrait être du type mèche de perceuse avec un revêtement diamanté (non représenté) .  Without departing from the scope of the invention, the drilling end could be drill bit type with a diamond coating (not shown).
Entre la collerette 2 et l'extrémité de perçage 3, le rivet 1 présente un corps 4 tubulaire en forme de fût ou tonneau.  Between the flange 2 and the piercing end 3, the rivet 1 has a tubular body 4 in the shape of a barrel or barrel.
Le corps 4 comprend un alésage divisible en trois parties s 'étendant selon l'axe AA : une première partie 5 cylindrique adjacente à la collerette 2, une seconde partie 6 cylindrique adjacente à l'extrémité de perçage 3, et une troisième partie 7 intermédiaire entre les deux parties 5, 6 cylindriques, qui est ici en forme de fût expansible radialement.  The body 4 comprises a divisible bore in three parts extending along the axis AA: a first cylindrical portion adjacent to the flange 2, a second cylindrical portion 6 adjacent to the piercing end 3, and a third intermediate portion 7 between the two parts 5, 6 cylindrical, which is here in the form of radially expandable shaft.
La troisième partie 7 intermédiaire comporte des fentes 8 d'ancrage longitudinal s 'étendant parallèlement à l'axe AA entre deux œillets 9, 10 percés aux deux extrémités de la troisième partie 7 intermédiaire expansible .  The third intermediate portion 7 comprises longitudinal anchoring slots 8 extending parallel to the axis AA between two eyelets 9, 10 pierced at the two ends of the third expansible intermediate portion.
Les fentes 8 dégagent entre elles des bandelettes inférieures 11 et supérieures 12 qui lors de l'expansion radiale du corps 4, vont se replier sur les unes sur les autres, extérieurement au corps 4 pour assurer l'expansion de la troisième partie 7 intermédiaire. Pour encore faciliter cette expansion radiale, d'autres œillets intermédiaires 13 sont percés sur la zone médiane de la troisième partie 7 intermédiaire expansible, formant une zone annulaire d'affaiblissement dans un plan transversal médian. Slots 8 release between them lower strips 11 and upper 12 which during the radial expansion of the body 4, will fold over each other externally to the body 4 to ensure the expansion of the third part 7 intermediate. To further facilitate this radial expansion, other intermediate eyelets 13 are drilled on the median zone of the third expansive intermediate portion 7, forming an annular zone of weakness in a median transverse plane.
Les bandelettes inférieures 11 présentent ici une surface extérieure abrasive. Les bandelettes supérieures 12 peuvent aussi présenter une surface extérieure abrasive .  The lower strips 11 here have an abrasive outer surface. The upper strips 12 may also have an abrasive outer surface.
La surface intérieure de la première partie 5 du corps 4 adjacente à la collerette 2 présente ici des griffes 17 inclinées vers l'intérieur de l'alésage du corps 4.  The inner surface of the first portion 5 of the body 4 adjacent to the flange 2 here has claws 17 inclined towards the inside of the bore of the body 4.
La figure 2 montre une vue de dessus du rivet 1. La collerette 2 présente des découpes autour d'un orifice d'entrée de l'alésage du corps 4.  FIG. 2 shows a view from above of the rivet 1. The collar 2 has cutouts around an inlet orifice of the bore of the body 4.
Selon l'invention, une tige 14, ici globalement cylindrique, dont la structure est visible sur la figure 4, s'insère dans l'alésage du corps 4 de rivet. Elle comprend trois parties s 'étendant selon l'axe AA : une première partie 18 à une extrémité de la tige 14 destinée à s'insérer dans la première partie 5 du corps 4 et dont la longueur est adaptée de sorte qu'elle se projette aussi au-delà de la collerette 2 à l'extérieur du corps 4 de rivet ; une seconde partie 19 à l'autre extrémité de la tige 14 destinée à se loger en partie dans la seconde partie 6 du corps 2 de rivet ; et une troisième partie 20, entre les première et seconde parties 18, 19 de tige 14 qui vient se loger dans la troisième partie 7 du corps 4 de rivet.  According to the invention, a rod 14, here globally cylindrical, whose structure is visible in Figure 4, is inserted into the bore of the body 4 rivet. It comprises three parts extending along the axis AA: a first part 18 at one end of the rod 14 intended to be inserted in the first part 5 of the body 4 and whose length is adapted so that it projects also beyond the flange 2 on the outside of the rivet body 4; a second portion 19 at the other end of the rod 14 intended to be partially housed in the second portion 6 of the rivet body 2; and a third portion 20, between the first and second parts 18, 19 of rod 14 which is housed in the third portion 7 of the rivet body 4.
La partie en saillie de la première partie 18 de la tige 14 par rapport au corps 4 de rivet va servir à entraîner le rivet 1 en rotation dans le sens classique de vissage, par action d'un outil avec cette partie s 'étendant à l'extérieur du corps 4, mais aussi en traction axiale. The protruding portion of the first portion 18 of the rod 14 relative to the rivet body 4 will be used to driving the rivet 1 in rotation in the conventional direction of screwing, by action of a tool with this part extending outside the body 4, but also in axial tension.
La seconde partie 19 de la tige 14 sert à solidariser en rotation axiale la tige 14 à la seconde partie 6 du corps 4 de rivet, ici illustré par un système de fixation du type languette 15/encoche 16. La solidarisâtion pourrait aussi se faire par soudure ou sertissage de la tige 14 au corps 4.  The second part 19 of the rod 14 serves to join in axial rotation the rod 14 to the second portion 6 of the rivet body 4, here illustrated by a fastening system of the tongue / notch type 16. The solidarity could also be done by welding or crimping the rod 14 to the body 4.
La troisième partie 20 de tige 14 présente ici une zone de rétrécissement radial correspondant à une zone sécable 21.  The third rod portion 14 here has a radial narrowing zone corresponding to a breakable zone 21.
Ainsi, selon l'invention, la tige 14 comble entièrement l'alésage du corps 4 de rivet à partir de la seconde partie 6 du corps 4 en direction de la collerette 2. La tige 14 permet ainsi d'assurer une étanchéité d'un coté à l'autre des éléments à assembler.  Thus, according to the invention, the rod 14 completely fills the bore of the rivet body 4 from the second portion 6 of the body 4 in the direction of the flange 2. The rod 14 thus makes it possible to ensure a tightness of a next to the other elements to assemble.
La mise en place du rivet 1, ici dans les deux plaques P, P' pour les assembler entre elles, s'opère en entraînant le rivet 1 en rotation dans le sens classique de vissage, par action de l'outil de vissage/traction sur la première partie 18 de la tige 14 en saillie du corps 4, pour réaliser un trou dans les deux plaques P et P' de la figure 5.  The establishment of the rivet 1, here in the two plates P, P 'to assemble them, is effected by driving the rivet 1 in rotation in the conventional direction of screwing, by action of the screwing tool / traction on the first portion 18 of the rod 14 projecting from the body 4, to make a hole in the two plates P and P 'of Figure 5.
Quand la collerette 2 vient en appui contre la plaque P supérieure à assembler, on opère avec l'outil une traction en translation axiale sur la tige 14 de sorte que la seconde partie 6 du corps 4 se rapproche de la collerette 2 ce qui provoque la déformation radiale de la troisième partie 7 expansible du corps 4 de rivet, les bandelettes inférieures 11 et supérieures 12 s 'écartant obliquement de l'axe AA du rivet 1 en ouvrant les fentes d'ancrages 8, jusqu'à ce que les bandelettes 11 et 12 forment un bourrelet sous les plaques P, P' assemblées. When the flange 2 abuts against the upper plate P to be assembled, the tool is operated with traction in axial translation on the rod 14 so that the second portion 6 of the body 4 approaches the collar 2 which causes the radial deformation of the third expansible part 7 of the rivet body 4, the lower strips 11 and 12 being wider apart obliquely of the axis AA of the rivet 1 by opening the anchoring slots 8, until the strips 11 and 12 form a bead under the plates P, P 'assembled.
La troisième partie 7 étant complètement expansée, comme illustré sur la figure 5, une portion de la troisième partie 20 de tige 14 se trouve alors insérée dans la première partie 5 du corps 4 où elle se trouve bloquée axialement par les griffes 17 agencées sur la face interne de la première partie 5 du corps 4. Les griffes 17 inclinées s'enfoncent par arc-boutement dans la matière de la tige 14 en cas de retrait de la tige 14 de la première partie 5 du corps 4.  The third part 7 being completely expanded, as illustrated in FIG. 5, a portion of the third part 20 of rod 14 is then inserted in the first part 5 of the body 4 where it is locked axially by the claws 17 arranged on the internal face of the first portion 5 of the body 4. The inclined claws 17 dig into the material of the stem 14 by withdrawal in the case of removal of the rod 14 of the first portion 5 of the body 4.
La zone sécable 21 sur la troisième partie 20 de tige 14 est agencée de sorte qu'après assemblage des éléments, la rupture de la tige 14 par traction exercée sur la tige 14 ne laisse pas la portion de la troisième partie 20 de tige 14 restante dans le corps 4 de rivet s'étendre au delà du corps 4 de rivet, et que la tige 14 cassée vienne en affleurement avec la collerette 2.  The breakable zone 21 on the third rod portion 14 is arranged so that after assembly of the elements, the breaking of the rod 14 by traction exerted on the rod 14 does not leave the portion of the third rod portion 14 remaining. in the rivet body 4 extend beyond the rivet body 4, and that the broken rod 14 comes flush with the flange 2.
Selon l'invention, la troisième partie 7 intermédiaire formée par les fentes 8 et les bandelettes 11, 12est conçue, avant sa déformation radiale, pour produire un effet d'abrasion ou d'ébavurage sur le bord périphérique du trou, lorsque cette troisième partie 7 traverse ce trou après la traversée du trou par l'extrémité de perçage 3 du rivet 1 selon l'invention.  According to the invention, the third intermediate part 7 formed by the slots 8 and the strips 11, 12 is designed, before its radial deformation, to produce an abrasion or deburring effect on the peripheral edge of the hole, when this third part 7 passes through this hole after passing through the hole by the piercing end 3 of the rivet 1 according to the invention.
Cette fonction d'abrasion ou d'ébavurage peut être remplie par la surface extérieure des bandelettes 11, 12 qui peut être prévue rugueuse. Elle peut encore être remplie par le ou les bords latéraux des bandelettes 11, 12 qui sont biseautés pour être tranchants. Ainsi, les bandelettes 11, 12 permettent un ponçage de l'intérieur du trou pour éliminer des fibres dépassantes et/ou des zones localement délaminées, de sorte à obtenir une surface propre et nette tout autour du trou. This abrasion or deburring function can be filled by the outer surface of the strips 11, 12 which can be roughened. It can still be filled by the side edge or edges of the strips 11, 12 which are bevelled to be sharp. Thus, the strips 11, 12 allow sanding the inside of the hole to remove protruding fibers and / or locally delaminated areas, so as to obtain a clean and clean surface all around the hole.
Selon l'invention, le rivet 1 avec la tige 14 peuvent être en tôle roulée et soudée, ou en tôle emboutie.  According to the invention, the rivet 1 with the rod 14 may be rolled sheet and welded, or stamped sheet.
Le rivet 1 peut aussi être réalisé complètement par moulage de matière plastique ou par injection de matière plastique pour être fabriqué à faible coût et servir à assembler deux tapis de sol automobile, ou un tapis de sol à une plaque par exemple.  The rivet 1 can also be made completely by plastic molding or injection of plastic material to be manufactured at low cost and used to assemble two automotive floor mats, or a floor mat to a plate for example.
Sans être limitatif, le rivet 1 pourrait aussi servir à fixer des passages de câbles, servir à positionner des systèmes de fixation lourde ou légère, ou encore pour la fixation interne pour les voitures avec caisse métallique ou composite.  Without being limiting, the rivet 1 could also be used for fixing cable passages, used to position heavy or light fastening systems, or for the internal fixation for cars with metal or composite box.
Il pourrait aussi être fabriqué par addition de matière dans une imprimante 3D si par exemple il s'agissait d'une fabrication en petites séries.  It could also be manufactured by adding material in a 3D printer if for example it was a small series production.

Claims

REVENDICATIONS
1. Rivet (1) auto-perceur comprenant une collerette (2) d'appui et une extrémité de perçage (3), avec entre ladite collerette (2) et ladite extrémité de perçage (3) un corps (4) tubulaire creux expansible radialement s 'étendant axialement, ledit corps (4) tubulaire comprenant une première partie (5) cylindrique adjacente à ladite collerette (2) et une seconde partie (6) cylindrique adjacente à ladite extrémité de perçage (3), et une troisième partie (7) expansible en forme de fût entre lesdites première et seconde parties (5, 6) cylindriques, ledit rivet (1) comprend en outre une tige (14) qui s'étend axialement dans ledit corps (4) creux, ladite tige (14) coopérant avec ledit corps creux pour l'entraîner en rotation axiale et pour le déformer radialement au niveau de ladite troisième partie (7) expansible sous l'effet d'une traction axiale, ladite tige (14) comportant une zone sécable (21) disposée en affleurement avec ladite collerette (2) lorsque ladite troisième partie (7) dudit corps (4) est complètement expansée radialement, caractérisé en ce que ladite troisième partie (7) expansible dudit corps (4) tubulaire comprend des fentes (8) et des bandelettes (11, 12) intercalées entre lesdites fentes (8), une zone annulaire d'affaiblissement dans un plan transversal médian, et en ce que ladite troisième partie (7) est conçue pour produire un effet d'abrasion ou d'ébavurage, avant sa déformation radiale, sur le bord périphérique d'un trou percé par ladite extrémité de perçage (3) . 1. Self-piercing rivet (1) comprising a support flange (2) and a piercing end (3), with between said flange (2) and said piercing end (3) an expandable hollow tubular body (4) radially extending axially, said tubular body (4) including a first cylindrical portion (5) adjacent said collar (2) and a second cylindrical portion (6) adjacent said piercing end (3), and a third portion ( 7) expandable in the form of a shaft between said first and second cylindrical portions (5, 6), said rivet (1) further comprises a rod (14) which extends axially in said hollow body (4), said rod (14) ) cooperating with said hollow body to drive it in axial rotation and to deform it radially at said third portion (7) expandable under the effect of axial traction, said rod (14) having a breakable zone (21) disposed flush with said flange (2) when said three part (7) of said body (4) is completely expanded radially, characterized in that said third expandable portion (7) of said tubular body (4) comprises slots (8) and strips (11, 12) interposed between said slots (8), an annular zone of weakening in a median transverse plane, and in that said third portion (7) is designed to produce an abrasion or deburring effect, before its radial deformation, on the peripheral edge of a hole pierced by said piercing end (3).
2. Rivet (1) auto-perceur selon la revendication 1, caractérisé en ce lesdites bandelettes (11, 12) ont une surface extérieure abrasive pour produire l'effet d'abrasion ou d'ébavurage. 2. Self-piercing rivet (1) according to claim 1, characterized in that said strips (11, 12) have an abrasive outer surface to produce the effect of abrasion or deburring.
3. Rivet (1) auto-perceur selon l'une des revendications précédentes, caractérisé en ce lesdites bandelettes (11, 12) ont un bord latéral biseauté tranchant pour produire l'effet d'abrasion ou d'ébavurage. 3. Self-piercing rivet (1) according to one of the preceding claims, characterized in that said strips (11, 12) have a bevel edge edge edged to produce the effect of abrasion or deburring.
4. Rivet (1) auto-perceur selon l'une des revendications précédentes, caractérisé en ce que ladite tige (14) comprend à une extrémité une première partie (18) qui s'étend dans ladite première partie (5) du corps (4) creux et qui se projette au-delà de ladite collerette (2) à l'extérieur dudit corps (4) . 4. Self-piercing rivet (1) according to one of the preceding claims, characterized in that said rod (14) comprises at one end a first portion (18) which extends in said first portion (5) of the body ( 4) and which projects beyond said flange (2) outside said body (4).
5. Rivet (1) auto-perceur selon la revendication 4, caractérisé en ce que ladite tige (14) comprend à l'autre extrémité une seconde partie (19) agencée pour se loger en partie dans ladite seconde partie (6) dudit corps (4) de sorte à être bloquée axialement dans ledit corps (4) . 5. rivet (1) self-piercing according to claim 4, characterized in that said rod (14) comprises at the other end a second portion (19) arranged to be housed in part in said second portion (6) of said body (4) so as to be locked axially in said body (4).
6. Rivet (1) auto-perceur selon la revendication 5, caractérisé en ce que ladite tige (14) comprend une troisième partie (20) de tige (14) entre lesdites première et seconde parties (18, 19) de tige avec ladite zone sécable (21) et ladite troisième partie (20) de tige (14) est agencée de sorte qu'une portion de ladite troisième partie (20) de tige (14) s'insère dans ladite première partie (5) dudit corps (4) quand ladite troisième partie (7) dudit corps (4) est complètement expansée radialement. A self-piercing rivet (1) according to claim 5, characterized in that said rod (14) comprises a third rod portion (20) between said first and second stem portions (18, 19) with said breakable zone (21) and said third rod portion (20) is arranged such that a portion of said third rod portion (14) is inserted into said first portion (5) of said body (14); 4) when said third part (7) of said body (4) is completely expanded radially.
7. Rivet (1) auto-perceur selon la revendication précédente, caractérisé en ce que ladite première partie (5) dudit corps (4) tubulaire a une surface intérieure pourvue de griffes (17) pour bloquer en translation axiale ladite tige (14) . 7. rivet (1) auto-piercer according to the preceding claim, characterized in that said first portion (5) of said tubular body (4) has an inner surface provided with claws (17) for locking in axial translation said rod (14). .
8. Rivet (1) auto-perceur selon l'une des revendications précédentes, caractérisé en ce que ladite tige (14) est fixée à ladite seconde partie (6) dudit corps (4) tubulaire par un système languette (15) / encoche ( 16 ) . 8. rivet (1) self-piercing according to one of the preceding claims, characterized in that said rod (14) is fixed to said second portion (6) of said body (4) tubular by a tongue system (15) / notch (16).
9. Rivet (1) auto-perceur selon l'une des revendications 1 à 7, caractérisé en ce que ladite tige (14) est fixée à ladite seconde partie (6) dudit corps (4) tubulaire par soudage. 9. rivet (1) self-piercing according to one of claims 1 to 7, characterized in that said rod (14) is fixed to said second portion (6) of said body (4) by tubular welding.
10. Rivet (1) auto-perceur selon l'une des revendications précédentes, caractérisé en ce que ladite extrémité de perçage (3) dudit corps (4) se présente sous la forme d'une scie cloche. 10. Self-piercing rivet (1) according to one of the preceding claims, characterized in that said piercing end (3) of said body (4) is in the form of a hole saw.
11. Rivet (1) auto-perceur selon l'une des revendications précédentes, caractérisé en ce qu'il est en tôle roulée et soudée. 11. rivet (1) self-piercing according to one of the preceding claims, characterized in that it is rolled sheet and welded.
12. Rivet (1) auto-perceur selon l'une des revendications 1 à 10, caractérisé en ce qu'il est en tôle emboutie. 12. rivet (1) self-piercing according to one of claims 1 to 10, characterized in that it is pressed sheet metal.
EP16809900.0A 2015-10-27 2016-10-18 Self-piercing rivet with high mechanical strength against tearing out and shearing Withdrawn EP3368777A1 (en)

Applications Claiming Priority (2)

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FR1560262A FR3042831B1 (en) 2015-10-27 2015-10-27 SELF-DRILLING RIVET WITH HIGH MECHANICAL RESISTANCE TO ARRACHEMENT AND SHEAR
PCT/FR2016/052692 WO2017072430A1 (en) 2015-10-27 2016-10-18 Self-piercing rivet with high mechanical strength against tearing out and shearing

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FR3042831A1 (en) 2017-04-28
US20180238371A1 (en) 2018-08-23
WO2017072430A1 (en) 2017-05-04
FR3042831B1 (en) 2018-03-09

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