FR2700817A1 - Rivet with clamping initiator - Google Patents

Rivet with clamping initiator Download PDF

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Publication number
FR2700817A1
FR2700817A1 FR9300872A FR9300872A FR2700817A1 FR 2700817 A1 FR2700817 A1 FR 2700817A1 FR 9300872 A FR9300872 A FR 9300872A FR 9300872 A FR9300872 A FR 9300872A FR 2700817 A1 FR2700817 A1 FR 2700817A1
Authority
FR
France
Prior art keywords
section
rivet
barrel
axis
deformation zone
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.)
Granted
Application number
FR9300872A
Other languages
French (fr)
Other versions
FR2700817B1 (en
Inventor
Filiot Gerard
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.)
Bollhoff Otalu SA
Original Assignee
Otalu SA
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 Otalu SA filed Critical Otalu SA
Priority to FR9300872A priority Critical patent/FR2700817B1/en
Priority to EP19930115602 priority patent/EP0595041A3/en
Publication of FR2700817A1 publication Critical patent/FR2700817A1/en
Application granted granted Critical
Publication of FR2700817B1 publication Critical patent/FR2700817B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • F16B19/10—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
    • F16B19/1072—Blind rivets fastened by a pull - mandrel or the like the pull-mandrel or the like comprising a thread and being rotated with respect to the rivet, thereby mechanically expanding and fastening the rivet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/08—Seam welding not restricted to one of the preceding subgroups
    • B23K11/093—Seam welding not restricted to one of the preceding subgroups for curved planar seams
    • B23K11/0935—Seam welding not restricted to one of the preceding subgroups for curved planar seams of tube sections
    • 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
    • F16B19/008—Bolts without screw-thread; Pins, including deformable elements; Rivets with sealing means

Abstract

The zone of deformation of the rivet includes a discontinuity of shape (2) subdividing it into a first frustoconical length (3) and a second length (4). Sheet-metal working industry.

Description

La présente invention se rapporte aux rivets comportant un fût prolongé à une extrémité par une zone de déformation tubulaire. Cette zone de déformation a une paroi moins épaisse que celle du fût et au moins une partie de sa face latérale extérieure est sensiblement cylindrique. La zone de déformation est destinée à se déformer en un bourrelet, sous l'action d'une force de compression axiale, lors du sértissage du rivet. La zone de déformation est suivie d'une tête destinée à venir sous une paroi à sertir. The present invention relates to rivets comprising a barrel extended at one end by a tubular deformation zone. This deformation zone has a wall thinner than that of the barrel and at least part of its outer lateral face is substantially cylindrical. The deformation zone is intended to deform into a bead, under the action of an axial compression force, during the setting of the rivet. The deformation zone is followed by a head intended to come under a wall to be crimped.

La zone de déformation se déforme en un bourrelet d'une manière qui n'est pas maîtrisée. Il s'ensuit souvent un désaxage du rivet. D'autre part, les contraintes dans la zone du sertissage dues au pliage, lors de la déformation en un bourrelet, provoquent souvent des fissurations, en particulier pour certains rivets en acier inoxydable, rédhibitoires notamment dans le cas d'un rivet étanche. The deformation zone deforms into a bead in a way that is not controlled. It often follows a misalignment of the rivet. On the other hand, the stresses in the crimping area due to bending, during deformation into a bead, often cause cracking, in particular for certain stainless steel rivets, which are particularly unacceptable in the case of a tight rivet.

Enfin, l'effort de pose est souvent important, ce qui restreint l'aptitude d'un appareillage de pose donné à poser une gamme étendue de rivets.Finally, the laying effort is often significant, which restricts the ability of a given fitting device to lay a wide range of rivets.

L'invention pallie ces inconvénients par un rivet qui comprend une discontinuité de forme, notamment un coude qui peut être arrondi, subdivisant la zone de déformation en un premier tronçon tronconique adjacent au fût et s'évasant dans la direction opposée au fût, et en un second tronçon de face latérale extérieure sensiblement cylindrique. The invention overcomes these drawbacks by a rivet which includes a discontinuity in shape, in particular a bend which can be rounded, subdividing the deformation zone into a first frustoconical section adjacent to the barrel and flaring in the direction opposite to the barrel, and a second section of substantially cylindrical outer lateral face.

Grâce à ce coude de fabrication, la déformation de la zone est mieux maîtrisée. La déformation est dirigée, d'autant que l'angle de pliage est réduit, ce qui diminue les contraintes et supprime ainsi sensiblement les fissurations que l'on observait jusqu'ici. L'effort de pose est moindre. Thanks to this manufacturing elbow, the deformation of the area is better controlled. The deformation is directed, all the more that the folding angle is reduced, which reduces the stresses and thus substantially eliminates the cracks that have been observed so far. The installation effort is less.

Il s'ensuit que la plage de sertissage, c'est-à-dire l'intervalle d'épaisseur des tôles que l'on peut sertir avec un rivet donné, est plus grande. Cette diminution de l'effort de pose se traduit également par la possibilité de sertir un rivet à l'aide d'un goujon fileté dont l'âme est petite ou en un matériau tendre. Comme l'effort de pose est moindre, on peut donner au rivet une épaisseur de paroi plus épaisse, ce qui le rend plus facile à fabriquer.It follows that the crimping range, that is to say the thickness interval of the sheets which can be crimped with a given rivet, is greater. This reduction in the laying effort also results in the possibility of crimping a rivet using a threaded stud whose core is small or made of a soft material. As the installation effort is less, the rivet can be given a thicker wall thickness, which makes it easier to manufacture.

Lorsque le rivet est destiné à riveter une ou plusieurs tôles d'épaisseur totale E, il est très souhaitable que la longueur de la génératrice extérieure du premier tronçon soit supérieure à la différence entre la longueur de la génératrice extérieure du second tronçon et l'épaisseur E de la tôle. On obtient ainsi un effet de genouillère particulièrement marqué qui assure un bon serrage des tôles. When the rivet is intended to rivet one or more sheets of total thickness E, it is very desirable that the length of the outside generator of the first section is greater than the difference between the length of the outside generator of the second section and the thickness E of sheet metal. This gives a particularly marked toggle effect which ensures good tightening of the sheets.

Pour prévenir tout effet de poinçonnage du fût dans le bourrelet, lors du sertissage, on préfère que la distance radiale la plus petite entre l'axe et la discontinuité soit inférieure ou égale à celle entre l'axe et la partie de la face extérieure du premier tronçon la plus proche de l'axe. To prevent any effect of punching the barrel in the bead, during crimping, it is preferred that the smallest radial distance between the axis and the discontinuity is less than or equal to that between the axis and the part of the outer face of the first section closest to the axis.

Si ce n'est pas le cas, il convient, de préférence, que le fût comporte à l'extrémité de raccordement du premier tronçon un épaulement vers l'extérieur, la distance radiale entre l'axe du rivet et la partie de l'épaulement qui en est la plus éloignée étant sensiblement égale à la distance entre l'axe du rivet et la face latérale extérieure du second tronçon. La partie en saillie du corps vient ainsi s'appuyer sur le bourrelet, lors du sertissage et sa course est limitée. If this is not the case, it is preferable that the barrel has a shoulder towards the outside at the connection end of the first section, the radial distance between the axis of the rivet and the part of the shoulder which is furthest from it being substantially equal to the distance between the axis of the rivet and the outer lateral face of the second section. The projecting part of the body thus comes to bear on the bead, during crimping and its stroke is limited.

Suivant un mode de réalisation, l'épaisseur de la paroi du fût adjacent au premier tronçon diminue progressivement vers le premier tronçon. Elle autorise une pliure vers l'intérieur qui permet de bloquer une pièce intérieure lors du sertissage. According to one embodiment, the thickness of the wall of the barrel adjacent to the first section gradually decreases towards the first section. It allows inward bending which allows an inner part to be blocked during crimping.

Le fût du rivet, suivant l'invention, peut être plein ou tubulaire éventuellement taraudé et son extrémité peut être ouverte ou fermée. The barrel of the rivet, according to the invention, can be full or tubular possibly tapped and its end can be open or closed.

Au dessin annexé, donné uniquement à titre d'exemple
la figure 1 est une vue partiellement en coupe d'un rivet suivant l'invention, avant sertissage,
la figure 2 est une vue en coupe du rivet de la figure 1, après sertissage,
les figures 3 et 4 sont des vues en coupe correspondant aux figures l et 2, d'une variante, et
les figures 5 et 6 sont des vues analogues d'une variante pour tige intérieure.In the accompanying drawing, given only by way of example
FIG. 1 is a partially sectioned view of a rivet according to the invention, before crimping,
FIG. 2 is a sectional view of the rivet of FIG. 1, after crimping,
FIGS. 3 and 4 are sectional views corresponding to FIGS. 1 and 2, of a variant, and
Figures 5 and 6 are similar views of a variant for an inner rod.

Le rivet représenté à la figure 1 comporte un fût 1 prolongé à une extrémité par une zone de déformation tubulaire de paroi moins épaisse que celle du fût 1. Cette zone comprend un coude 2 la subdivisant en un premier tronçon 3 tronconique adjacent au fût 1 et s'évasant dans la direction opposée à celui-ci et en un second tronçon 4 de face latérale extérieure sensiblement cylindrique. Une tête 6 en saillie vers l'extérieur fait suite au second tronçon 4. The rivet shown in FIG. 1 comprises a barrel 1 extended at one end by a tubular deformation zone with a wall thinner than that of the barrel 1. This zone comprises an elbow 2 dividing it into a first frustoconical section 3 adjacent to the barrel 1 and flaring in the opposite direction to it and in a second section 4 of substantially cylindrical outer lateral face. A head 6 projecting outwards follows the second section 4.

La distance radiale la plus petite entre l'axe XX' et le coude 2 est égale à celle entre l'axe XX' et la partie 5 de la face extérieure du premier tronçon 3 la plus proche de 1' axe XX'. The smallest radial distance between the axis XX 'and the elbow 2 is equal to that between the axis XX' and the part 5 of the outer face of the first section 3 closest to the axis XX '.

La longueur de la génératrice extérieure du premier tronçon 3 est supérieure à la différence entre la longueur de la génératrice extérieure du second tronçon 4 et l'épaisseur
E de la tôle à fixer, laquelle est supportée par la tête 6 du rivet. The length of the outside generator of the first section 3 is greater than the difference between the length of the outside generator of the second section 4 and the thickness
E of the sheet to be fixed, which is supported by the head 6 of the rivet.

A la figure 3, le fût l comporte, à l'extrémité de raccordement du premier tronçon 3, un épaulement 7 vers l'extérieur, la distance radiale entre l'axe XX' du rivet et la partie de l'épaulement 7 qui en est le plus éloigné étant sensiblement égale à la distance entre l'axe du rivet et la face latérale extérieure du second tronçon 4. In FIG. 3, the barrel l comprises, at the connection end of the first section 3, a shoulder 7 towards the outside, the radial distance between the axis XX 'of the rivet and the part of the shoulder 7 which is the most distant being substantially equal to the distance between the axis of the rivet and the external lateral face of the second section 4.

A la figure 5, l'épaisseur de la paroi 8 du fût l adjacente au premier tronçon 3 diminue progressivement vers ce premier tronçon 3. On crée ainsi -un coude 9 tourné vers l'intérieur qui fait que, lors du sertissage, le fut 1 vient bloquer une tige 10 enfilée dans le fût l et servant entre autres à obtenir la traction nécessaire au sertissage.  In FIG. 5, the thickness of the wall 8 of the barrel l adjacent to the first section 3 decreases progressively towards this first section 3. This creates an elbow 9 turned inwards which means that, during crimping, the barrel 1 blocks a rod 10 threaded into the barrel l and used inter alia to obtain the traction necessary for crimping.

Claims (7)

REVENDICATIONS 1. Rivet comportant un fût (1) prolongé à un extrémité par une zone de déformation tubulaire de paroi moins épaisse que celle du fût (1), et dont au moins une partie de la face latérale extérieure est sensiblement cylindrique, la zone de déformation étant suivie d'une tête (6), caractérisé en ce que la zone de déformation comprend une discontinuité de forme (2) subdivisant la zone de déformation en un premier tronçon (3) tronconique adjacent au fût (1) et s'évasant dans la direction opposée au fût (1) et en un second tronçon (4) de face latérale extérieure sensiblement cylindrique. 1. Rivet comprising a barrel (1) extended at one end by a tubular deformation zone with a wall thinner than that of the barrel (1), and of which at least part of the external lateral face is substantially cylindrical, the deformation zone being followed by a head (6), characterized in that the deformation zone comprises a form discontinuity (2) subdividing the deformation zone into a first frustoconical section (3) adjacent to the barrel (1) and widening in the direction opposite to the barrel (1) and in a second section (4) of substantially cylindrical outer lateral face. 2. Rivet suivant la revendication 1, caractérisé en ce que la discontinuité de forme est un coude. 2. Rivet according to claim 1, characterized in that the discontinuity of shape is an elbow. 3. Rivet suivant la revendication 2, caractérisé en ce que la discontinuité de forme est un coude arrondi. 3. Rivet according to claim 2, characterized in that the discontinuity of shape is a rounded elbow. 4. Rivet suivant l'une des revendications précédentes, destiné à riveter une tôle d'épaisseur (E), caractérisé en ce que la longueur de la génératrice extérieure du premier tronçon (3) est supérieure à la différence entre la longueur de la génératrice extérieure du second tronçon (4) et l'épaisseur (E) de la tôle. 4. Rivet according to one of the preceding claims, intended to rivet a thick sheet (E), characterized in that the length of the external generator of the first section (3) is greater than the difference between the length of the generator outside of the second section (4) and the thickness (E) of the sheet. 5. Rivet suivant l'une des revendications précédentes, caractérisé en ce que la distance radiale la plus petite entre l'axe (XX') et la discontinuité de forme (2) est inférieure ou égale à celle entre l'axe (XX') et la partie (5) de la face extérieure du premier tronçon (3) la plus proche de l'axe (XX'). 5. Rivet according to one of the preceding claims, characterized in that the smallest radial distance between the axis (XX ') and the form discontinuity (2) is less than or equal to that between the axis (XX' ) and the part (5) of the outer face of the first section (3) closest to the axis (XX '). 6. Rivet suivant l'une des revendications 1 à 4, caractérisé en ce que le fût (1) comporte, à l'extrémité de raccordement du premier tronçon (3), un épaulement (7) vers l'extérieur, la distance radiale entre l'axe (XX') du rivet et la partie de l'épaulement (7) qui en est le plus éloignée étant sensiblement égale à la distance entre l'axe (XX') du rivet et la face latérale extérieure du second tronçon (4). 6. Rivet according to one of claims 1 to 4, characterized in that the barrel (1) comprises, at the connection end of the first section (3), a shoulder (7) outwards, the radial distance between the axis (XX ') of the rivet and the part of the shoulder (7) which is furthest from it being substantially equal to the distance between the axis (XX') of the rivet and the external lateral face of the second section (4). 7. Rivet suivant l'une des revendications 1 à 5, caractérisé en ce que l'épaisseur de la paroi (8) du fût (l)- adjacente au premier tronçon (3) diminue progressivement vers le premier tronçon (3).  7. Rivet according to one of claims 1 to 5, characterized in that the thickness of the wall (8) of the barrel (l) - adjacent to the first section (3) gradually decreases towards the first section (3).
FR9300872A 1992-09-29 1993-01-28 Rivet at the start of crimping. Expired - Fee Related FR2700817B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9300872A FR2700817B1 (en) 1993-01-28 1993-01-28 Rivet at the start of crimping.
EP19930115602 EP0595041A3 (en) 1992-09-29 1993-09-28 Connection, in particular to a hole accessible only from one side

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9300872A FR2700817B1 (en) 1993-01-28 1993-01-28 Rivet at the start of crimping.

Publications (2)

Publication Number Publication Date
FR2700817A1 true FR2700817A1 (en) 1994-07-29
FR2700817B1 FR2700817B1 (en) 1995-03-24

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Family Applications (1)

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FR9300872A Expired - Fee Related FR2700817B1 (en) 1992-09-29 1993-01-28 Rivet at the start of crimping.

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FR (1) FR2700817B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0945631A3 (en) * 1998-03-23 2000-07-19 Emhart Inc. Securing element
DE102005031916A1 (en) * 2005-07-07 2007-03-15 Böllhoff Verbindungstechnik GmbH Joining element for mechanical joining
EP2960531A1 (en) 2014-06-27 2015-12-30 Bollhoff Otalu S.A. Crimping piece on a support, device comprising such a piece and methods of manufacturing such a part and such a device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR737284A (en) * 1932-05-19 1932-12-09 Combined pull-crimp rivet
US3055255A (en) * 1957-03-25 1962-09-25 Avdel Ltd Blind rivet with internal mandrel supporting element
US3698278A (en) * 1971-03-15 1972-10-17 Vsi Corp Nut member
EP0398403A1 (en) * 1989-05-19 1990-11-22 ATELIERS DE LA HAUTE-GARONNE - ETABLISSEMENTS AURIOL & Cie S.a.R.L. Blind riveting element, assembling process and components thus obtained

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR737284A (en) * 1932-05-19 1932-12-09 Combined pull-crimp rivet
US3055255A (en) * 1957-03-25 1962-09-25 Avdel Ltd Blind rivet with internal mandrel supporting element
US3698278A (en) * 1971-03-15 1972-10-17 Vsi Corp Nut member
EP0398403A1 (en) * 1989-05-19 1990-11-22 ATELIERS DE LA HAUTE-GARONNE - ETABLISSEMENTS AURIOL & Cie S.a.R.L. Blind riveting element, assembling process and components thus obtained

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0945631A3 (en) * 1998-03-23 2000-07-19 Emhart Inc. Securing element
DE102005031916A1 (en) * 2005-07-07 2007-03-15 Böllhoff Verbindungstechnik GmbH Joining element for mechanical joining
GB2428077B (en) * 2005-07-07 2008-08-27 Boellhoff Berbindungstechnik G Joining member for mechanical jointing
DE102005031916B4 (en) * 2005-07-07 2008-09-11 Böllhoff Verbindungstechnik GmbH Semi-holed punch rivet for mechanical joining and method for producing a joint connection
EP2960531A1 (en) 2014-06-27 2015-12-30 Bollhoff Otalu S.A. Crimping piece on a support, device comprising such a piece and methods of manufacturing such a part and such a device
US9903402B2 (en) 2014-06-27 2018-02-27 Bollhoff Otalu S.A. Piece to be crimped on a support, device comprising such a piece and methods for manufacturing such a piece and such a device

Also Published As

Publication number Publication date
FR2700817B1 (en) 1995-03-24

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