EP1958715B1 - Method for assembling at least two elements by means of a blind rivet - Google Patents
Method for assembling at least two elements by means of a blind rivet Download PDFInfo
- Publication number
- EP1958715B1 EP1958715B1 EP08354008A EP08354008A EP1958715B1 EP 1958715 B1 EP1958715 B1 EP 1958715B1 EP 08354008 A EP08354008 A EP 08354008A EP 08354008 A EP08354008 A EP 08354008A EP 1958715 B1 EP1958715 B1 EP 1958715B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rivet
- stamping
- shank
- crimping
- elements
- 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.)
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000002788 crimping Methods 0.000 claims description 44
- 238000000926 separation method Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000010951 brass Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 5
- 239000011324 bead Substances 0.000 description 17
- 238000000605 extraction Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000007425 progressive decline Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/02—Riveting procedures
- B21J15/04—Riveting hollow rivets mechanically
- B21J15/043—Riveting hollow rivets mechanically by pulling a mandrel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/0007—Tools for fixing internally screw-threaded tubular fasteners
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
- Y10T29/49915—Overedge assembling of seated part
- Y10T29/49917—Overedge assembling of seated part by necking in cup or tube wall
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
- Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
- Y10T29/49943—Riveting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49947—Assembling or joining by applying separate fastener
- Y10T29/49954—Fastener deformed after application
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49947—Assembling or joining by applying separate fastener
- Y10T29/49954—Fastener deformed after application
- Y10T29/49956—Riveting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53709—Overedge assembling means
- Y10T29/53717—Annular work
- Y10T29/53726—Annular work with second workpiece inside annular work one workpiece moved to shape the other
- Y10T29/5373—Annular work with second workpiece inside annular work one workpiece moved to shape the other comprising driver for snap-off-mandrel fastener; e.g., Pop [TM] riveter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53709—Overedge assembling means
- Y10T29/5377—Riveter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/49—Member deformed in situ
- Y10T403/4966—Deformation occurs simultaneously with assembly
Definitions
- the invention relates to a method of assembling at least two elements by means of a crimp rivet, comprising a head and a barrel, according to the preamble of claim 1.
- a known assembly method conventionally uses a rivet, type blind rivet crimp with incorporated rod.
- a rivet 10 conventionally comprises a head 11 and a body 12 intended to be deformed to produce a crimping bead for blocking the panels assembled between said bead and the head 11.
- the rivet 10 also comprises a rod 13 incorporated, intended for to be introduced into an associated laying tool (not shown on the figure 1 ), intended to perform the crimping operation.
- the assembly method of the two elements then comprises the insertion of the rivet 10 in corresponding orifices of the elements to be assembled. Then, the rod 13 is inserted into one end of the laying tool, in order to perform the crimping step of the rivet. After crimping, the rod 13 is eliminated by rupture substantially at the head 11 of the rivet 10.
- the document US3838499 on which is based the preamble of claim 1 describes a method of assembling two elements by means of a rivet, wherein a pulling rod of a setting tool is hooked by punching to a portion of the barrel of rivet, then the rivet is inserted into the corresponding orifices of the elements to be assembled.
- the process ends with a crimping step of the rivet and a step of separating the rivet setting tool.
- the crimping step is performed by radial deformation of the part of the barrel on which the stamping has been applied.
- the step of separating the tool is practiced at the same time as the crimping step because the radial deformation creating the crimping bead is accompanied simultaneously by a progressive decrease in the tensile strength.
- the separation step is prolonged after the end of the crimping step by a axial tearing of the inner face of the stamped portion of the barrel.
- the separation step comprises firstly a first simultaneous sub-step at the crimping step and performed by radial deformation of the portion of the barrel on which the stamping has been applied, and secondly a second sub-step performed after the step of crimping by axial tearing of the inner face of the stamped portion of the barrel.
- This assembly method is not completely satisfactory because the second substep of the separation step may cause deterioration of the assembly carried out beforehand during the crimping step, in particular deterioration of the quality of the bead. crimping since it is made by deformation of the stamped part of the rivet shaft, where the axial tearing occurs.
- the object of the invention is to improve the existing assembly processes.
- the method of the invention is remarkable in that the step of separating the rivet setting tool is performed after the crimping step of the rivet, by radial deformation of the portion of the rivet shaft, on which was applied matrixing.
- the assembly method of the invention allows a sequential installation of the rivet by successively producing a first radial deformation for the crimping step and a second radial deformation, different from the first, for the separation step.
- a crimping bead is produced by radial deformation of a portion of the barrel interposed between the head and the part of the barrel on which the crimp has been applied. stamping.
- the subsequent separation step by deformation of the stamped part does not cause any deterioration of the crimping bead because it is axially distant from the stamped part.
- the stamping step is performed at the free end of the rivet shaft to a predetermined height.
- the assembly method according to the invention is in particular intended to assemble at least two elements 14, 15, for example panels, plates or the like, by means of a crimp rivet 16 and a setting tool 17 ( figures 2 and 4 ).
- the principle of the assembly method according to the invention consists in particular in hanging by stamping part of the rivet 16 on a pull rod 18 of the laying tool 17, before insertion of the rivet 16 into orifices 19, 20, respectively, elements 14, 15 to be assembled and crimped of the rivet 16, in order to guarantee the assembly of the two elements 14, 15.
- the rivet 16 used for the assembly process is a conventional rivet comprising a flat head 21 and a barrel 22, preferably cylindrical, pierced and open ( figure 2 ) and preferably comprising a stamping zone 23 inside the barrel 22.
- the rivet 16 is made of a material capable of deforming for the stamping operation, for example steel, stainless steel, brass or aluminum.
- the laying tool 17 comprises an anvil 24, placed on either side of the pull rod 18 and intended to bear on the head 21 of the rivet 16 during the assembly of the two elements 14 and 15.
- the pull rod 18 is intended to be inserted inside the rivet 16 and has an end 25, for example, grooved.
- the stamping operation for fastening the rivet 16 on the pull rod 18 is performed at the free end of the barrel 22 of the rivet 16, opposite the head 21, so as to cooperate in particular with the end 25. grooved of the pull rod 18 ( figure 3 ).
- the shaft 22 of the rivet 16 may be blind and / or may comprise an outer shoulder, located under the head 21 of the rivet 16.
- the head 21 of the rivet 16 may be thin or milled and the rod Traction 18 may have a threaded or conical end.
- the first step of the process consists in positioning the head 21 of the rivet 16 against the anvil 24, for example steel, of the laying tool 17 and to position the rivet 16 in a stamping tool 26, formed, for example, of two or more steel sectors, shaped according to the desired shape of the stamping on the rivet 16.
- the following step consists in performing the stamping operation, that is to say applying a radial force according to the arrows F1, on the outer surface of the shaft 22 of the rivet 16 and on a predefined height, corresponding in particular to the height of the sectors of the stamping tooling 26.
- the stamping step makes it possible to hang the rivet 16 on the pull rod 18 of the setting tool 17, the material inside the rivet 16 being placed in the grooves of the end 25 of the traction rod 18 of the laying tool 17.
- the stamping height corresponds substantially to the height of the end 25 of the pull rod 18 of the laying tool 17 and the stamping zone 23 inside the barrel 22 of the rivet 16.
- the end of the stamping step is in particular determined by the contacting of the sectors of the stamping tool 26.
- the rivet 16 thus hooked on the pull rod 18 is then removed from the stamping tool 26 and placed in the corresponding orifices 19, 20 of the elements 14 and 15 to be assembled.
- the diameter of the orifices 19, 20 of the elements 14, 15 is chosen to be slightly greater than the diameter of the shaft 22 of the rivet 16.
- the height of the rivet 16 is also calculated, so that the sum of the thicknesses of the elements 14 and 15 to be assembled is compatible with the crimping operation of the rivet 16, namely with the creation of a crimping bead as described below.
- the height of the shank 22 is such that after the stamping operation, there remains an undeformed part of the shank 22 interposed between the head 21 and the shank portion 22 on which the stamping has been applied, the non-deformed part whose height is greater than the sum of the thicknesses of the elements 14 and 15.
- the difference between the height of the undeformed portion and the sum of the thicknesses of the elements 14 and 15 is chosen to allow the subsequent creation of a crimping bead.
- the next step of the method is the crimping step of the rivet 16 in the elements 14, 15 to be assembled.
- the crimping step consists in applying a traction force, according to the arrow T1, on the traction rod 18 in opposition to the application of a compressive force, according to the arrows C1, of the anvil 24 on the head 21 of the rivet 16, so as to obtain a crimping bead 27, characteristic of the crimping operation.
- the bead 27, formed under the element 15, is then intended to block the two elements 15, 16 against each other and between itself and the head 21 of the rivet 16.
- the height of the barrel 22 of the rivet 16 and the stamped area of the rivet 16 on the pull rod 18 are in particular calculated, so that the shaft 22 retains a height sufficient to be deformed to obtain the crimping bead 27, as shown in FIG. figure 5 : in the crimping step, the crimping bead 27 is formed by a radial deformation of a portion of the barrel 22 interposed between the head 21 and the portion of the barrel 22 on which the stamping has been applied. More specifically, the crimping bead 27 is generated by radial deformation of a segment of the undeformed barrel portion 22 during the stamping step, namely the segment directly adjacent to the barrel portion 22 on which has been applied. matrixing.
- the remaining segment of the barrel portion 22 undeformed during the stamping step namely the segment interposed between the head 21 and the crimping bead 27, has a height substantially equal to the sum of the thicknesses of the elements 14, 15 and remains intact in the crimping step.
- the assembly method then comprises a step of separating the setting tool 17 from the rivet 16.
- the separation step consists of applying a pulling force, according to the arrow T2, on the traction rod 18 of the setting tool 17 and a compressive force, according to the arrows C2, on the anvil 24, different from the traction forces (arrow T1) and compression (arrows C1) of the crimping step shown on the figure 5 .
- the separation step occurs in particular from a calibrated force of the laying tool 17.
- the traction force according to the arrow T2 ( figure 6 ) is greater than the tractive force according to arrow T1 ( figure 5 ) and the compression force according to arrows C2 ( figure 6 ) is preferably greater than the compression force according to the arrows C1 ( figure 5 ).
- Such a calibration with different tensile and compressive forces according to the steps of the method make it possible in particular to guarantee optimal crimping of the rivet 16 in the two elements 14 and 15.
- the step of separating the setting tool 17 and the rivet 16 may comprise an additional step of unscrewing the pull rod 18. , in order to carry out the complete extraction of the pull rod 18 of the rivet 16 after the radial deformation of the part barrel 22 on which the stamping was applied. It is thus possible to use the rivet 16 with an additional nut function.
- the laying tool 17 is completely removed from the rivet 16.
- the two elements 14, 15 are then firmly assembled, the rivet 16 being optimally held in position in the corresponding orifices 19, 20 of the elements 14, 15 now assembled.
- Such an assembly method according to the invention therefore uses a stamping principle allowing, on the one hand, to hang the rivet 16 effectively and quickly on the pull rod 18 and, on the other hand, to fix firmly the rivet 16 in the elements to be assembled, to ensure optimal assembly.
- the assembly method according to the invention also uses a principle of extraction of the rivet 16 of the setting tool 17 after crimping, simple, fast and without damage to the assembly carried out beforehand.
- the laying tool 17 used for such an assembly method is easy to use regardless of the shape of the end 25 of the pull rod 18.
- the rivet 16 used for the assembly method according to the invention is a simple rivet, consisting of a simple hollow metal part comprising a head and a hollow tubular shaft, without an incorporated traction system, namely an internal thread. or a rod.
- the dimensions and material of the rivet 16 are able to withstand and adapt to the stamping treatment, that is to say that they are adapted so that the rivet can be installed in any type of applications requiring the Rivet blind rivet type rivet.
- the height and the depth of the stamping performed on the shaft 22 of the rivet 16 are such as to guarantee a sequential laying of the rivet 16, first of all by crimping the rivet 16 in the elements 14 and 15, then the extraction of the pull rod 18, without breaking the rivet 16 or the pull rod 18 of the laying tool 17.
- the sequential laying of the rivet 16 is practiced by successively producing a first radial deformation (bead crimping device 27) for the crimping step, then a second radial deformation, axially offset from the first deformation, for the separation step.
- the separation step performed by deformation of the part on which the stamping has been applied causes no damage to the crimping bead 27 because it is axially distant from the part on which the stamping has been applied.
- the invention is not limited to the embodiment described above.
- the rivet 16 may be made of any material capable of deforming by stamping.
- the dimensions and shapes of the rivet 16 (head 21 and shaft 22) and of the laying tool 17 are nonlimiting and depend in particular on the dimensions of the elements 14, 15 to be assembled and the intended applications.
- the use of a blind rivet 16 allows in particular to ensure a total sealing function between the two elements 14 and 15 to be assembled, possibly with the addition of an attached or overmolded seal or a plastic washer under the head 21 of rivet 16 one-eyed.
- the length of the rivet 16 and the height of the die formed on its shaft 22 depend in particular on the diameter of the rivet 16 and the thickness of the elements 14, 15 to be crimped.
- the rivet 16 can be hooked on the pull rod 18 of the setting tool 17 by any type of stamping process, namely any type of cold deformation of the material of the rivet 16.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
- Connection Of Plates (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
L'invention concerne un procédé d'assemblage d'au moins deux éléments par l'intermédiaire d'un rivet à sertir, comportant une tête et un fût, selon le préambule de la revendication 1.The invention relates to a method of assembling at least two elements by means of a crimp rivet, comprising a head and a barrel, according to the preamble of claim 1.
Pour la fixation d'au moins deux éléments du type panneaux, plaques ou analogue, un procédé d'assemblage connu utilise classiquement un rivet, du type rivet aveugle à sertir avec tige incorporée. Comme représenté sur la
Le procédé d'assemblage des deux éléments comporte alors l'insertion du rivet 10 dans des orifices correspondants des éléments à assembler. Puis, la tige 13 est insérée dans une extrémité de l'outil de pose, afin d'effectuer l'étape de sertissage du rivet. Après sertissage, la tige 13 est éliminée par rupture sensiblement au niveau de la tête 11 du rivet 10.The assembly method of the two elements then comprises the insertion of the
Cependant, un tel procédé d'assemblage, même s'il est relativement simple et rapide, n'offre pas toutes les garanties notamment d'un point de vue optimisation de l'assemblage et positionnement du rivet dans les éléments assemblés. Plus particulièrement, il est nécessaire d'éliminer la tige 13 restante après rupture et le rivet 10 installé après sertissage présente une retenue très aléatoire, le corps 12 pouvant notamment vibrer en utilisation dans les éléments assemblés. Par ailleurs, la déformation du rivet 10 ne garantit pas le plaquage des éléments assemblés et l'étanchéité entre la tige 13 et le rivet 10 est difficile à obtenir. La distribution et la pose automatique d'un tel rivet 10 sont également difficiles à réaliser.However, such an assembly method, even if it is relatively simple and fast, does not offer all the guarantees including an optimization point of view of the assembly and positioning of the rivet in the assembled elements. More particularly, it is necessary to eliminate the
Le document
Ce procédé d'assemblage n'est pas complètement satisfaisant car la deuxième sous-étape de l'étape de séparation risque de provoquer une détérioration de l'assemblage effectué au préalable pendant l'étape de sertissage, notamment une détérioration de la qualité du bourrelet de sertissage étant donné qu'il est réalisé par déformation de la partie matricée du fût du rivet, là où se produit l'arrachement axial.This assembly method is not completely satisfactory because the second substep of the separation step may cause deterioration of the assembly carried out beforehand during the crimping step, in particular deterioration of the quality of the bead. crimping since it is made by deformation of the stamped part of the rivet shaft, where the axial tearing occurs.
L'invention a pour but d'améliorer les procédés d'assemblage existants.The object of the invention is to improve the existing assembly processes.
Le procédé de l'invention est remarquable en ce que l'étape de séparation de l'outil de pose du rivet est effectuée après l'étape de sertissage du rivet, par déformation radiale de la partie du fût du rivet, sur laquelle a été appliqué le matriçage.The method of the invention is remarkable in that the step of separating the rivet setting tool is performed after the crimping step of the rivet, by radial deformation of the portion of the rivet shaft, on which was applied matrixing.
Le procédé d'assemblage de l'invention permet une pose séquentielle du rivet en réalisant successivement une première déformation radiale pour l'étape de sertissage puis une deuxième déformation radiale, différente de la première, pour l'étape de séparation.The assembly method of the invention allows a sequential installation of the rivet by successively producing a first radial deformation for the crimping step and a second radial deformation, different from the first, for the separation step.
Durant l'étape de sertissage, un bourrelet de sertissage est réalisé par une déformation radiale d'une partie du fût intercalée entre la tête et la partie du fût sur laquelle a été appliqué le matriçage. Il en résulte que l'étape de séparation effectuée ultérieurement par déformation de la partie matricée ne provoque aucune détérioration du bourrelet de sertissage car celui-ci est axialement distant de la partie matricée.During the crimping step, a crimping bead is produced by radial deformation of a portion of the barrel interposed between the head and the part of the barrel on which the crimp has been applied. stamping. As a result, the subsequent separation step by deformation of the stamped part does not cause any deterioration of the crimping bead because it is axially distant from the stamped part.
Selon une caractéristique de l'invention, l'étape de matriçage est réalisée au niveau de l'extrémité libre du fût du rivet sur une hauteur prédéterminée.According to a feature of the invention, the stamping step is performed at the free end of the rivet shaft to a predetermined height.
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode particulier de réalisation de l'invention donné à titre d'exemple non limitatif et représenté aux dessins annexés, dans lesquels :
- La
figure 1 représente un rivet aveugle à tige incorporée, utilisé pour la réalisation d'un procédé d'assemblage d'au moins deux éléments selon l'art antérieur. - Les
figures 2 à 7 représentent schématiquement des vues de face en coupe partielle de différentes étapes successives d'un mode particulier de réalisation d'un procédé d'assemblage selon l'invention.
- The
figure 1 represents a blind rivet with incorporated rod, used for the realization of a method of assembling at least two elements according to the prior art. - The
Figures 2 to 7 schematically represent front views in partial section of different successive steps of a particular embodiment of an assembly method according to the invention.
En référence aux
Dans le mode particulier de réalisation représenté sur les
L'outil de pose 17 comporte une enclume 24, placée de part et d'autre de la tige de traction18 et destinée à venir en appui sur la tête 21 du rivet 16 lors de l'assemblage des deux éléments 14 et 15. Dans le mode particulier de réalisation des
Dans des variantes de réalisation non représentées, le fût 22 du rivet 16 peut être borgne et/ou peut comporter un épaulement externe, situé sous la tête 21 du rivet 16. La tête 21 du rivet 16 peut être fine ou fraisée et la tige de traction 18 peut comporter une extrémité 25 filetée ou conique.In embodiments not shown, the
Le procédé d'assemblage des deux éléments 14 et 15 au moyen du rivet 16 et de l'outil de pose 17 va être décrit plus en détail au regard des
Sur la
Sur la
Sur la
Sur la
L'étape de séparation intervient notamment à partir d'un effort calibré de l'outil de pose 17. Ainsi, pour l'étape de séparation de l'outil de pose 17, la force de traction selon la flèche T2 (
De telles forces appliquées par l'outil de pose 17 entraînent alors, selon les flèches F2, la déformation radiale du fût 22 du rivet 16 et le retrait de la matière du fût 22 insérée initialement par matriçage sur l'extrémité 25 de la tige de traction 18. Il en résulte une diminution progressive de la résistance à la traction du rivet 16, qui devient presque nulle, voire nulle suivant les applications, et l'extraction de la tige de traction 18 est alors facilitée par une simple translation de l'outil de pose 17 hors du rivet 16. La déformation radiale de la partie de fût 22 sur laquelle a été appliqué le matriçage intervient entre l'extrémité du fût 22 opposée à la tête 21, et le bourrelet de sertissage 27.Such forces applied by the
Dans une variante de réalisation non représentée, dans laquelle la tige de traction 18 comporte une extrémité 25 filetée, l'étape de séparation de l'outil de pose 17 et du rivet 16 peut comporter une étape additionnelle de dévissage de la tige de traction 18, en vue d'effectuer l'extraction complète de la tige de traction 18 du rivet 16 après la déformation radiale de la partie de fût 22 sur laquelle a été appliqué le matriçage. Il est ainsi possible d'utiliser le rivet 16 avec une fonction supplémentaire d'écrou.In an alternative embodiment, not shown, in which the
Sur la
Un tel procédé d'assemblage selon l'invention utilise donc un principe de matriçage permettant, d'une part, d'accrocher de façon efficace et rapide le rivet 16 sur la tige de traction 18 et, d'autre part, de fixer solidement le rivet 16 dans les éléments à assembler, afin d'assurer un assemblage optimal. Le procédé d'assemblage selon l'invention utilise également un principe d'extraction du rivet 16 de l'outil de pose 17 après sertissage, simple, rapide et sans détérioration de l'assemblage effectué au préalable.Such an assembly method according to the invention therefore uses a stamping principle allowing, on the one hand, to hang the
Par ailleurs, l'outil de pose 17 utilisé pour un tel procédé d'assemblage est simple d'utilisation quelle que soit la forme de l'extrémité 25 de la tige de traction 18.Moreover, the laying
De plus, le rivet 16 utilisé pour le procédé d'assemblage selon l'invention est un rivet simple, constitué d'une simple pièce métallique creuse comportant une tête et un fût tubulaire creux, sans système de traction incorporé, à savoir un filetage interne ou une tige. Les dimensions et la matière du rivet 16 sont aptes à résister et à s'adapter au traitement de matriçage, c'est-à-dire qu'elles sont adaptées pour que le rivet puisse s'installer dans tout type d'applications nécessitant la pose d'un rivet du type rivet aveugle à sertir.In addition, the
Par ailleurs, la hauteur et la profondeur du matriçage effectué sur le fût 22 du rivet 16 sont telles qu'elles permettent de garantir une pose séquentielle du rivet 16, assurant d'abord le sertissage du rivet 16 dans les éléments 14 et 15, puis l'extraction de la tige de traction 18, sans rupture du rivet 16 ou de la tige de traction 18 de l'outil de pose 17. La pose séquentielle du rivet 16 se pratique en réalisant successivement une première déformation radiale (bourrelet de sertissage 27) pour l'étape de sertissage, puis une deuxième déformation radiale, axialement décalée de la première déformation, pour l'étape de séparation. Il en résulte que l'étape de séparation effectuée par déformation de la partie sur laquelle a été appliqué le matriçage ne provoque aucune détérioration du bourrelet de sertissage 27 car celui-ci est axialement distant de la partie sur laquelle a été appliqué le matriçage.Moreover, the height and the depth of the stamping performed on the
L'invention n'est pas limitée au mode de réalisation décrit ci-dessus. Le rivet 16 peut être réalisé en toute matière apte à se déformer par matriçage. Les dimensions et les formes du rivet 16 (tête 21 et fût 22) et de l'outil de pose 17 sont non limitatives et dépendent notamment des dimensions des éléments 14, 15 à assembler et des applications visées. L'utilisation d'un rivet 16 borgne permet notamment d'assurer une fonction d'étanchéité totale entre les deux éléments 14 et 15 à assembler, éventuellement avec l'ajout d'un joint rapporté ou surmoulé ou d'une rondelle plastique sous la tête 21 du rivet 16 borgne.The invention is not limited to the embodiment described above. The
De plus, la longueur du rivet 16 et la hauteur du matriçage réalisé sur son fût 22 dépendent notamment du diamètre du rivet 16 et de l'épaisseur des éléments 14, 15 à sertir. Le rivet 16 peut être accroché sur la tige de traction 18 de l'outil de pose 17 par tout type de procédé de matriçage, à savoir tout type de déformation à froid de la matière du rivet 16.In addition, the length of the
Claims (6)
- A method for assembling at least two elements (14, 15) by means of a crimping rivet (16) comprising a head (21) and a shank (22) and an associated fitting tool (17), the method consisting in successively:- securing a part of the shank (22) of the rivet (16) by stamping (F1) to a corresponding part of a traction rod (18) of the fitting tool (17) inserted inside the shank (22) of the rivet (16),- inserting the rivet (16) in corresponding holes (19, 20) of the elements (14, 15) to be assembled,- crimping the rivet (16) with the fitting tool (17), consisting in applying a first tractive force (T1) to the rod (18) in opposition to a compressive force (C1) on the head (21) of the rivet (16) to produce a crimping rim (27) by a radial deformation of a part of the shank (22) intercalated between the head (21) and the part of the shank (22) on which stamping (F1) was applied,- and then separating the fitting tool (17) with respect to the rivet (16),characterized in that the thickness of the part of the shank (22) on which stamping (F1) was applied is greater than the thickness of part of the shank (22) located between the latter and the head (21) of the rivet (16), which part is arranged such as to receive said radial deformation and to produce said crimping rim (27); separation of the fitting tool (27) with respect to the rivet (16) consisting in achieving a radial deformation (F2) of the part of the shank (22) on which stamping (F1) was applied, by applying to the rod (18) a second tractive force (T2) that is greater than the first tractive force (T1) and a second compressive force (C2) that is preferably greater than the first compressive force (C1).
- The method according to claim 1, characterized in that stamping (F1) is performed at the free end of the shank (22) of the rivet (16) over a preset height.
- The method according to one of claims 1 and 2, characterized in that separation of the fitting tool (17) with respect to the rivet (16) comprises a step of unscrewing a threaded end (25) of the traction rod (18).
- The method according to any one of claims 1 to 3, characterized in that the rivet (16) comprises a stamping area (23) inside the shank (22) corresponding to the height of the part of the shank (22) designed to receive the stamping.
- The method according to any one of claims 1 to 4, characterized in that the traction rod (18) of the fitting tool (17) comprises a grooved, threaded or conical end (25).
- The method according to any one of claims 1 to 5, characterized in that the rivet (16) is made from a material chosen from steel, stainless steel, brass or aluminium.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0701015A FR2912333B1 (en) | 2007-02-13 | 2007-02-13 | METHOD FOR ASSEMBLING AT LEAST TWO ELEMENTS THROUGH A CRIMPING RIVET |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1958715A1 EP1958715A1 (en) | 2008-08-20 |
EP1958715B1 true EP1958715B1 (en) | 2009-10-07 |
Family
ID=38432828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08354008A Active EP1958715B1 (en) | 2007-02-13 | 2008-01-25 | Method for assembling at least two elements by means of a blind rivet |
Country Status (8)
Country | Link |
---|---|
US (1) | US8001670B2 (en) |
EP (1) | EP1958715B1 (en) |
CN (1) | CN101244447B (en) |
AT (1) | ATE444820T1 (en) |
BR (1) | BRPI0800096A (en) |
DE (1) | DE602008000184D1 (en) |
ES (1) | ES2332837T3 (en) |
FR (1) | FR2912333B1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080302425A1 (en) * | 2007-06-05 | 2008-12-11 | Continental Automotive Systems Us, Inc. | Formed Flange For Pressure Monitoring Valve Stem Mount |
FR2927675B1 (en) * | 2008-02-19 | 2013-02-08 | Lisi Aerospace | PROVISIONAL AND REUSABLE FIXING DEVICE FOR THE PRE-ASSEMBLY OF AT LEAST TWO STRUCTURAL ELEMENTS PRE-PRINTED. |
CN102606598B (en) * | 2011-01-25 | 2016-12-21 | 博尔霍夫.奥塔陆股份有限公司 | The threaded insert of molding to be embedded and insert molding method |
FR3063027B1 (en) * | 2017-02-17 | 2021-05-21 | Bollhoff Otalu Sa | NUT TO CRIMP AND METHOD FOR MANUFACTURING SUCH A NUT. |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1102937A (en) * | 1913-07-09 | 1914-07-07 | Norman Mellor | Collapsing tool. |
US2205772A (en) * | 1937-01-22 | 1940-06-25 | Joseph W Bowersox | Rivet setting device |
US2188422A (en) * | 1937-06-09 | 1940-01-30 | Goodrich Co B F | Fluid-tight attachment and tubular rivet therefor |
CS162125B1 (en) * | 1972-03-07 | 1975-07-15 | ||
US6487767B1 (en) * | 2000-04-10 | 2002-12-03 | Fatigue Technology, Inc. | Method and apparatus for connecting a fastener element to a wall |
US6665922B2 (en) * | 2002-05-13 | 2003-12-23 | Hi-Shear Corporation | Pull stem hi-lite pin with pull groove for swaging collars |
-
2007
- 2007-02-13 FR FR0701015A patent/FR2912333B1/en not_active Expired - Fee Related
-
2008
- 2008-01-23 US US12/010,276 patent/US8001670B2/en not_active Expired - Fee Related
- 2008-01-25 EP EP08354008A patent/EP1958715B1/en active Active
- 2008-01-25 AT AT08354008T patent/ATE444820T1/en not_active IP Right Cessation
- 2008-01-25 CN CN200810004577.4A patent/CN101244447B/en not_active Expired - Fee Related
- 2008-01-25 DE DE602008000184T patent/DE602008000184D1/en active Active
- 2008-01-25 ES ES08354008T patent/ES2332837T3/en active Active
- 2008-02-13 BR BRPI0800096-4A patent/BRPI0800096A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CN101244447A (en) | 2008-08-20 |
BRPI0800096A (en) | 2008-10-07 |
DE602008000184D1 (en) | 2009-11-19 |
US20080209711A1 (en) | 2008-09-04 |
EP1958715A1 (en) | 2008-08-20 |
FR2912333B1 (en) | 2009-07-31 |
US8001670B2 (en) | 2011-08-23 |
ES2332837T3 (en) | 2010-02-12 |
FR2912333A1 (en) | 2008-08-15 |
CN101244447B (en) | 2011-09-21 |
ATE444820T1 (en) | 2009-10-15 |
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