WO2013140084A1 - Instrumented cam crimping device - Google Patents

Instrumented cam crimping device Download PDF

Info

Publication number
WO2013140084A1
WO2013140084A1 PCT/FR2013/050580 FR2013050580W WO2013140084A1 WO 2013140084 A1 WO2013140084 A1 WO 2013140084A1 FR 2013050580 W FR2013050580 W FR 2013050580W WO 2013140084 A1 WO2013140084 A1 WO 2013140084A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensitive
crimping
punch
sensitive portion
strain gauges
Prior art date
Application number
PCT/FR2013/050580
Other languages
French (fr)
Inventor
Jean-Louis Charron
Didier Anthoine-Milhomme
Original Assignee
Centre Technique Des Industries Mecaniques
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 Centre Technique Des Industries Mecaniques filed Critical Centre Technique Des Industries Mecaniques
Publication of WO2013140084A1 publication Critical patent/WO2013140084A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • H01R43/0486—Crimping apparatus or processes with force measuring means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/058—Crimping mandrels
    • H01R43/0585—Crimping mandrels for crimping apparatus with more than two radially actuated mandrels

Definitions

  • the present invention relates generally to the field of crimping systems, in particular for crimping connection elements on electrical conductors.
  • a crimping device comprising a punch holder member surrounded by a ring gear, rotatably mounted relative to one another about a crimping axis, the ring having two opposite flat annular faces and a surface internal cylindrical formed of at least four identical active portions each extending over 90 ° and each having a profile delimiting a bearing zone against which is intended to slide the end of a crimping punch mounted movably in a housing of the punch holder member extending radially with respect to the crimping axis, so that a relative rotational movement of the punch holder member and the ring gear causes centripetal movement of the crimping punches.
  • a crimping tool which applies in particular to a clamp crimping machine having a plurality of crimping punches which are translatable in a housing of a punch holder which extends radially with respect to an axis along which the conductor and the crimp connection member extend.
  • a support member comprising a ring whose profiled inner surface - acting as a cam - cooperates with the outer ends of the punches, is rotatably mounted relative to the punch holder according to said crimping axis. Rotation of the ring relative to the punch holder causes a centripetal movement of the punches and the crimping of a connection element thus "pinched" between several pairs of punches.
  • the device described in this document also discloses the presence of means for facilitating the control of the quality of crimping.
  • these means implement sensors integrated into the tool, including in particular a position / displacement sensor sensitive to the position of at least one of the punches in its housing, as well as a sensor sensitive to the crimping force, these sensors being connected to a suitable signal processing circuit itself integrated into the tool.
  • sensors integrated into the tool including in particular a position / displacement sensor sensitive to the position of at least one of the punches in its housing, as well as a sensor sensitive to the crimping force, these sensors being connected to a suitable signal processing circuit itself integrated into the tool.
  • the way to integrate these sensors into the tool is not described, but there is reason to believe that the way to instrument the tool with the sensors greatly influences the measurement results and their reliability.
  • these crimp quality control means require the implementation of several different sensors at the tool to acquire the information useful for checking the quality of crimping, making the integration complex.
  • an object of the invention is to provide a crimping device free from at least one of the limitations mentioned above.
  • the crimping device of the invention is essentially characterized in that the crown is provided with at least one light extending in the plane of the opposite planar annular faces along a curved path substantially parallel to the inner cylindrical surface, opposite the bearing zone of at least one active portion of the inner cylindrical surface, so as to provide a part of sensitive between said at least one lumen and the bearing zone, which extends on either side of a fulcrum of the crimping punch on the bearing zone, the sensitive part being able to deform under the action of a force applied by the crimping punch and having two opposite flat faces, at least one of which is equipped with a measuring member comprising at least one strain gauge disposed at the respective ends of said flat face in one po Wheatstone-sensitive element, mainly sensitive to the shearing of a section of the sensitive part near said respective ends resulting from the deformation caused by the force exerted by the crimping punch on the bearing zone, said measuring member being connected
  • each sensitive part of the crown forms a test body supporting a bearing zone of the internal cylindrical surface on which the punch comes to slide during a crimping operation, which test body supports a measuring member provided for transmitting information on the deformation generated by the crimping operation, from which it is possible to determine both the intensity of the force applied by the crimping punch along the zone crown support and the position of its point of application at this support zone.
  • the invention also has one or more of the following advantageous features, singly or in combination:
  • the measuring member may be implanted either on a single planar face of the sensitive part or on both sides of the sensitive part on each of the two opposite planar faces of the sensitive part.
  • the measuring member comprises, at each respective end of the planar face of the sensitive part, a single strain gauge arranged in a quarter bridge assembly, each gauge being disposed substantially at 45 ° of a longitudinal median axis of the sensitive portion symmetrically with respect to a radial central axis of the sensitive portion.
  • the measuring member comprises, at each respective end of the planar face of the sensitive portion, two strain gauges arranged in a half-bridge arrangement and arranged substantially at 45.degree. ° a longitudinal median axis of the sensitive part.
  • the ring comprises two lumens distributed circumferentially in the plane of the opposite planar annular faces, so that each of the two lumens extends respectively opposite two orthogonal support zones.
  • the inner cylindrical surface so as to provide first and second sensitive portions each extending on either side of the fulcrum of the crimping punch respectively on the two orthogonal support zones.
  • the measuring member can comprise at each respective end of the flat face of first and second sensitive parts, a single strain gauge disposed substantially at 45 ° to a longitudinal central axis of the sensitive portion symmetrically with respect to a radial central axis of the sensitive portion, the deformation gauges of a respective first end of the planar face of the first and second sensitive portions being arranged in a half-bridge arrangement, and the strain gauges of a respective second end of the planar face of the first and second sensitive portions are arranged in a half-bridge arrangement.
  • the measuring member comprises, at each respective end of the plane face of the first and second sensitive parts, two strain gauges disposed substantially at 45 ° to a longitudinal central axis of the part. sensitively, the strain gauges of a respective first end of the planar face of the first and second sensing portions being arranged in a full bridge arrangement, and the strain gauges of a respective second end of the planar face of the first and second sensitive parts are arranged in a full bridge arrangement.
  • each sensitive portion has a thickness of material in its median portion substantially greater than at its ends, so as to minimize the level of mechanical deformation in the middle zone of the sensitive portion.
  • FIG. 1 schematically illustrates a crimping device according to the invention.
  • the crimping device 1 consists of a ring 2 with an axis 21, in the form of a thick ring with two opposite planar annular faces 20 (only one being visible in FIG. 1
  • the ring also comprises an inner surface 22 of cylindrical shape, which has a periodic profile, according to the example of FIG. 1, this cylindrical inner surface 22 comprises four identical active portions each extending over 90 ° about the axis. 21 and each having a profile defining a bearing zone, respectively 220 to 223.
  • a punch holder member 3 is rotatably mounted within the ring gear and supports four identical crimping punches 31 respectively received in four housings 32 formed in the punch holder member 3 and extending radially with respect to the axis 21 along four axes coplanar and angularly spaced 90 °.
  • Each punch 31 is movably mounted in its respective housing and has an end portion 310, which is provided to slide on a respective bearing area 220 to 223 of the cylindrical inner surface 22 of the ring 2 against which it relies .
  • the crimping device may comprise two arms not shown in Figure 1, pivotally mounted relative to each other along the axis 21, one being secured to the ring 2 and the other being secured to the punch holder member 3.
  • the ring 2 it is proposed to configure the ring 2 to allow its instrumentation with strain gauges so that it is possible to measure both the intensity of the forces exerted by the punches on the ring during an operation. crimping and the position of their application at the cylindrical inner surface of the crown.
  • the measurement principle on which the invention is based is to measure the deformation caused by the shearing of two sections placed on either side of the fulcrum of a punch on the inner cylindrical surface of the crown.
  • a first lumen 23 extending in the plane of the opposite planar annular faces 20 along a curved path substantially parallel to the internal cylindrical surface 22, at a distance from the latter and facing the bearing zone corresponding 220 of the first active portion over the entire length thereof.
  • This machining operation thus makes it possible to define, between the inner cylindrical surface 22 of the ring 2 and the slot 23, formed right through the axial thickness of the ring 2 between its two opposite flat annular faces 20, a first sensitive portion 230, which extends on either side of a fulcrum of the crimping punch 31 on the corresponding bearing zone 220, and on which are intended to be carried out the measurements of the effort exerted by the punch 31 on the bearing zone 220 of the inner cylindrical surface 22 of the crown 2 and the position of the point of application of this force at the bearing zone, as will be seen in more detail thereafter.
  • the lumen 23 extends at a distance from the inner cylindrical surface 22, so that the sensitive portion 230 thus created has a thickness of material h such that it is capable of undergoing measurable deformation with inexpensive means and leading to stress levels that do not result in permanent deformations in adjacent stress zones.
  • a second lumen 24 is machined, which extends in the plane of the opposite planar annular faces 20 along a curved path substantially parallel to the internal cylindrical surface 22, at a distance from the latter, opposite the the corresponding bearing zone 221 disposed orthogonally to the bearing zone 220 in front of which the first lumen 23 is formed, so as to delimit at the level of the crown 2, between the internal cylindrical surface 22 and the second lumen 24, a second part 240, which extends on either side of a fulcrum of the crimping punch 31 on the bearing zone 221, over the entire length thereof.
  • first and second sensitive portions 230 and 240 thus created by respectively the first and second slots 23 and 24 distributed circumferentially on the ring in a 90 ° distribution, each comprise two opposite planar faces 231 and 241 respectively extending in the plane two opposite planar annular faces 20 of the ring gear 2 and a curved portion formed by the corresponding bearing area 220 and 221 of the inner cylindrical surface 22 of the ring gear 2 on which the crimping punch 31 slides.
  • Each sensitive portion 230 and 240 of the ring 2 thus has a particularly advantageous shape, in that it can be likened to a bending beam recessed at each of its ends, respectively A and B and A 'and B' as illustrated in FIG. Figure 1, which supports the load applied by the crimping punch at the corresponding bearing area.
  • each sensitive portion 230 and 240 formed at the ring 2 can be used as test body supporting strain gauges, which emit deformation signals when the test body is deformed under the effect of the application of the load by the crimping punch on the corresponding support zone.
  • each sensitive portion 230 and 240 is instrumented on at least one of its two opposite planar faces 231 and 241 according to the desired accuracy, with strain gauges arranged to measure the shear of the section. of the test body at the two ends of the beam, respectively at A and B and at A 'and B'.
  • This arrangement of strain gauges installed so as to be sensitive to shear at both ends of the beam supporting the load applied by the punch to the corresponding bearing area advantageously makes it possible simultaneously to measure the position of the punch at the level of the zone support and the efforts it exerts, using the measurement of the forces transmitted by the ends of the beam.
  • this type of gauge positioning and the associated wiring results in an independence of the signal delivered with respect to the position of the force along the free length of the beam constituted by the bearing zone of the crimping punch.
  • the sum of the two The forces measured at each end then represent the crimping force and the ratio or the difference between these two forces is used to determine the position of the punch at the level of the bearing zone, without it being necessary to implant a displacement sensor.
  • This arrangement therefore contributes to considerably reducing the complexity of the embodiment while improving reliability, accuracy and reducing the costs of production.
  • strain gauges are glued to the respective ends of at least one of its opposite planar faces, near the zones of embedding of the beam formed by the sensitive part, and are connected to a data processing unit capable of transforming an electrical output signal supplied by the strain gauges into signals representative of the intensity of the force applied by the punch of crimping on the corresponding support zone and the position of the point of application of this force on this support zone.
  • strain gauges and their associated wiring can be envisaged for the positioning of the strain gauges and their associated wiring, according to whether a sensor formed of a single instrumented sensitive part or of two orthogonally distributed instrumented sensitive parts and according to which the instrument is being instrumented is implemented. or the sensitive parts on one side or on the two opposite flat faces, depending on the degree of precision desired, but also the space available to position the gauges.
  • the minimum instrumentation of the sensitive part forming the test body comprises a strain gauge mounted at each respective end of a planar face of the sensitive part, where each strain gauge is arranged in a quarter-bridge assembly and is preferably disposed substantially at 45 ° to a longitudinal median axis of the sensitive portion symmetrically with respect to a radial central axis of the sensitive portion.
  • each strain gauge is arranged in a quarter-bridge assembly and is preferably disposed substantially at 45 ° to a longitudinal median axis of the sensitive portion symmetrically with respect to a radial central axis of the sensitive portion.
  • it is also possible to position at each respective end of the flat face of the sensitive part two strain gauges arranged in a half-bridge arrangement and preferably disposed substantially at 45 ° to the longitudinal central axis of the sensitive part. .
  • FIG. 2 shows a detailed view of the two sensitive parts 230, 240 machined in the ring 2, as described in FIG. 1 and illustrates an embodiment of the positioning of the strain gauges for the instrumentation of these two sensitive parts 230 , 240 each forming a test body.
  • a strain gauge respectively R1, R2 is positioned, these gauges R1, R2 being arranged preferably substantially at 45 ° to the longitudinal median axis XX of the first sensitive portion 230 symmetrically with respect to its radial median axis YY.
  • a strain gauge respectively R3, R4 is positioned, these gauges R3, R4 preferably being arranged substantially at 45 ° of the longitudinal median axis XX of the second sensitive portion 240 symmetrically with respect to its radial median axis YY.
  • strain gauges R1 and R3 respectively positioned at the ends A and A 'of the planar face 231, 241 of the first and second sensitive portions 230, 240 are arranged in a half-bridge arrangement, and the strain gauges R2 and R4 positioned. respectively at the ends B and B 'of the planar face 231, 241 of the first and second sensitive portions 230, 240 are arranged in a half-bridge arrangement.
  • the available space is sufficient, it is used two strain gauges preferably disposed substantially at 45 ° by end, on a flat face of each test body.
  • the strain gauges of the respective ends A and A 'of the plane face 231, 241 of the first and second sensitive parts 230, 240 are arranged in a complete bridge assembly and the strain gauges of the respective ends B and B of the planar face 231, 241 of the first and second sensitive portions 230, 240 are arranged in a full bridge arrangement.
  • the instrumentation with strain gauges of the sensitive part or parts can also be doubled on either side of each sensitive part, by positioning the gauges in the manner just described according to the various embodiments on each of the two opposite planar faces of the at least one sensitive portion.
  • the set of strain gauges to be used can be made in one piece that integrates all the gauges, the bridge wiring and the solder pads for the connection with the electronics. This assembly is then positioned and glued on a single flat annular face of the ring or on the two opposite planar annular faces, so as to instrument the sensing part or parts forming test body according to the embodiments described above.
  • this assembly including the strain gauges, the bridge wiring and the solder pads can also receive the digitizing electronics of the signal (s) delivered by the strain gauges. which makes it possible to simplify the wired link (3 wires) with the data processing electronics.
  • each lumen 23, 24 is machined at the level of the crown 2 at a certain distance from the corresponding bearing zone 220, 221 of the internal cylindrical surface 22, so as to leave a thickness of material h in the profile. of the corresponding support zone.
  • This thickness of material corresponds to the thickness of the beam thus formed, which supports the load applied by the crimping punch 31 during its sliding at the corresponding bearing zone 220, 221 during the crimping operation and the value of this thickness of material h can be determined with respect to the height of material constituting the crown profile at the corresponding bearing area, so as to have a level of mechanical deformation of the sensitive part allowing operation optimal deformation gauges glued at the ends of the or opposite planar faces of the sensitive portion.
  • this value can be determined by making a calculation of the mechanical behavior of the sensitive part so that the maximum stresses and mechanical strains are acceptable and do not risk leading to fatigue damage but on the other hand are sufficiently high to obtain an electrical measurement signal usable by the processing unit.
  • the geometry of the beam formed by each test body sensitive portion can be optimized to improve the result of the measurements.
  • the material thickness constituting the sensitive portion can vary along the profile of the corresponding support zone, so as to minimize the deformations in its median part (ie in a zone substantially around the radial median axis) .
  • the corresponding light is machined so that the sensitive area has a material thickness in its median portion substantially greater than at its ends.

Abstract

The invention concerns a crimping device comprising a punch plate (3) and a ring (2) rotationally mounted around a crimping axis (21), the ring have two opposing annular faces (20) and a profiled internal cylindrical surface (22) delimiting respective support areas (220-223) engaging with crimping punches (31) mounted radially mobile relative to the crimping axis. According to the invention, a hole (23) is built into the plane of the opposing annular faces, facing at least one support area, so as to construct a sensitive part (230) between the hole and the support area, extending on either side of a support point of the crimping punch and able to deform when a force is applied by the crimping punch, while an instrumentation of the sensitive part is capable of providing the intensity of the force and the position of the point where said force is applied on the support area.

Description

Dispositif de sertissage à came instrumentée  Instrumented cam crimping device
La présente invention concerne de façon générale le domaine des systèmes de sertissage, notamment pour le sertissage d'éléments de connexion sur des conducteurs électriques. The present invention relates generally to the field of crimping systems, in particular for crimping connection elements on electrical conductors.
Elle concerne plus particulièrement un dispositif de sertissage comprenant un organe porte-poinçons entouré par une couronne, montés en rotation l'un par rapport à l'autre autour d'un axe de sertissage, la couronne présentant deux faces annulaires planes opposées et une surface cylindrique interne formée d'au moins quatre portions actives identiques s'étendant chacune sur 90° et présentant chacune un profil délimitant une zone d'appui contre laquelle est destinée à glisser l'extrémité d'un poinçon de sertissage monté mobile dans un logement de l'organe porte-poinçons s'étendant radialement par rapport à l'axe de sertissage, de sorte qu'un mouvement en rotation relatif de l'organe porte-poinçons et de la couronne entraîne un déplacement centripète des poinçons de sertissage.  It relates more particularly to a crimping device comprising a punch holder member surrounded by a ring gear, rotatably mounted relative to one another about a crimping axis, the ring having two opposite flat annular faces and a surface internal cylindrical formed of at least four identical active portions each extending over 90 ° and each having a profile delimiting a bearing zone against which is intended to slide the end of a crimping punch mounted movably in a housing of the punch holder member extending radially with respect to the crimping axis, so that a relative rotational movement of the punch holder member and the ring gear causes centripetal movement of the crimping punches.
Un tel dispositif est bien connu de l'homme du métier, notamment par l'exemple qu'en donne le document de brevet EP 0 415 831. Ce document décrit en effet un outil de sertissage, qui s'applique en particulier à une pince à sertir, comportant plusieurs poinçons de sertissage qui sont mobiles en translation dans des logements d'un porte-poinçon qui s'étendent radialement par rapport à un axe le long duquel doivent s'étendre le conducteur et l'élément de connexion à sertir. Dans cet outil, un organe d'appui comportant une couronne dont une surface interne profilée - servant de came - coopère avec les extrémités externes des poinçons, est monté rotatif par rapport au porte- poinçons selon ledit axe de sertissage. Une rotation de la couronne par rapport au porte-poinçon provoque un déplacement centripète des poinçons et le sertissage d'un élément de connexion ainsi « pincé » entre plusieurs paires de poinçons.  Such a device is well known to those skilled in the art, in particular by the example given in the patent document EP 0 415 831. This document indeed describes a crimping tool, which applies in particular to a clamp crimping machine having a plurality of crimping punches which are translatable in a housing of a punch holder which extends radially with respect to an axis along which the conductor and the crimp connection member extend. In this tool, a support member comprising a ring whose profiled inner surface - acting as a cam - cooperates with the outer ends of the punches, is rotatably mounted relative to the punch holder according to said crimping axis. Rotation of the ring relative to the punch holder causes a centripetal movement of the punches and the crimping of a connection element thus "pinched" between several pairs of punches.
Le dispositif décrit dans ce document divulgue également la présence de moyens permettant de faciliter le contrôle de la qualité du sertissage. En particulier, ces moyens mettent en œuvre des capteurs intégrés à l'outil, comportant notamment un capteur de position/déplacement sensible à la position d'au moins un des poinçons dans son logement, ainsi qu'un capteur sensible à l'effort de sertissage, ces capteurs étant reliés à un circuit de traitement du signal approprié lui-même intégré à l'outil. Cependant, la façon d'intégrer ces capteurs à l'outil n'est pas décrite, or il y a lieu de penser que la façon d'instrumenter l'outil avec les capteurs influence grandement les résultats des mesures et leur fiabilité. En outre, ces moyens de contrôle de la qualité du sertissage nécessitent d'implanter plusieurs capteurs distincts au niveau de l'outil pour acquérir les informations utiles au contrôle de la qualité de sertissage, rendant l'intégration complexe. Egalement, il peut être parfois souhaitable d'acquérir en tant qu'information utile pour le sertissage, outre une mesure de l'effort de sertissage et/ou de l'effort exercé par la couronne sur les poinçons, une mesure de la position d'application de cet effort aux poinçons, notamment pour éviter l'emploi de système de mesure de déplacement auxiliaire pour des applications où la connaissance de cette information est nécessaire. The device described in this document also discloses the presence of means for facilitating the control of the quality of crimping. In particular, these means implement sensors integrated into the tool, including in particular a position / displacement sensor sensitive to the position of at least one of the punches in its housing, as well as a sensor sensitive to the crimping force, these sensors being connected to a suitable signal processing circuit itself integrated into the tool. However, the way to integrate these sensors into the tool is not described, but there is reason to believe that the way to instrument the tool with the sensors greatly influences the measurement results and their reliability. In addition, these crimp quality control means require the implementation of several different sensors at the tool to acquire the information useful for checking the quality of crimping, making the integration complex. Also, it may sometimes be desirable to acquire as useful information for crimping, in addition to measuring the crimping force and / or the force exerted by the crown on the punches, a measurement of the position of the crimping tool. application of this effort to the punches, in particular to avoid the use of auxiliary displacement measuring system for applications where the knowledge of this information is necessary.
Aussi, un but de l'invention est de proposer un dispositif de sertissage exempt de l'une au moins des limitations précédemment évoquées.  Also, an object of the invention is to provide a crimping device free from at least one of the limitations mentioned above.
A cette fin, le dispositif de sertissage de l'invention, par ailleurs conforme à la définition générique qu'en donne le préambule ci-dessus, est essentiellement caractérisé en ce que la couronne est pourvue d'au moins une lumière s'étendant dans le plan des faces annulaires planes opposées suivant un trajet courbe sensiblement parallèle à la surface cylindrique interne, en vis- à-vis de la zone d'appui d'au moins une portion active de la surface cylindrique interne, de sorte à ménager une partie sensible entre ladite au moins une lumière et la zone d'appui, qui s'étend de part et d'autre d'un point d'appui du poinçon de sertissage sur la zone d'appui, la partie sensible étant apte à se déformer sous l'action d'un effort appliqué par le poinçon de sertissage et ayant deux faces planes opposées dont l'une au moins est équipée d'un organe de mesure comprenant au moins une jauge de déformation disposée aux extrémités respectives de ladite face plane dans un pont de Wheatstone sensible principalement au cisaillement d'une section de la partie sensible à proximité desdites extrémités respectives résultant de la déformation engendrée par l'effort exercé par le poinçon de sertissage sur la zone d'appui, ledit organe de mesure étant relié à une unité de traitement de données apte à transformer des signaux de déformation émis par les jauges de déformation en signaux représentatifs de l'intensité de l'effort et de la position du point d'application de cet effort sur la zone d'appui. To this end, the crimping device of the invention, moreover in accordance with the generic definition given in the preamble above, is essentially characterized in that the crown is provided with at least one light extending in the plane of the opposite planar annular faces along a curved path substantially parallel to the inner cylindrical surface, opposite the bearing zone of at least one active portion of the inner cylindrical surface, so as to provide a part of sensitive between said at least one lumen and the bearing zone, which extends on either side of a fulcrum of the crimping punch on the bearing zone, the sensitive part being able to deform under the action of a force applied by the crimping punch and having two opposite flat faces, at least one of which is equipped with a measuring member comprising at least one strain gauge disposed at the respective ends of said flat face in one po Wheatstone-sensitive element, mainly sensitive to the shearing of a section of the sensitive part near said respective ends resulting from the deformation caused by the force exerted by the crimping punch on the bearing zone, said measuring member being connected to a data processing unit adapted to transform deformation signals transmitted by the strain gauges into signals representative of the intensity of the force and the position of the point of application of this force on the support zone.
Ainsi, grâce à cet agencement, chaque partie sensible de la couronne forme un corps d'épreuve soutenant une zone d'appui de la surface cylindrique 5 interne sur laquelle vient glisser le poinçon lors d'une opération de sertissage, lequel corps d'épreuve supporte un organe de mesure prévu pour transmettre des informations sur la déformation engendrée par l'opération de sertissage, à partir desquelles il est possible de déterminer à la fois l'intensité de l'effort appliqué par le poinçon de sertissage le long de la zone d'appui de la couronne î o et la position de son point d'application au niveau de cette zone d'appui.  Thus, thanks to this arrangement, each sensitive part of the crown forms a test body supporting a bearing zone of the internal cylindrical surface on which the punch comes to slide during a crimping operation, which test body supports a measuring member provided for transmitting information on the deformation generated by the crimping operation, from which it is possible to determine both the intensity of the force applied by the crimping punch along the zone crown support and the position of its point of application at this support zone.
L'invention présente aussi l'une ou plusieurs des caractéristiques avantageuse suivantes, isolément ou en combinaison :  The invention also has one or more of the following advantageous features, singly or in combination:
L'organe de mesure peut être est implanté soit sur une seule face plane de la partie sensible, soit de part et d'autre de la partie sensible sur chacune 15 des deux faces planes opposées de la partie sensible.  The measuring member may be implanted either on a single planar face of the sensitive part or on both sides of the sensitive part on each of the two opposite planar faces of the sensitive part.
Selon un mode de réalisation de l'invention où la couronne du dispositif de sertissage comprend une seule partie sensible instrumentée, l'organe de mesure comprend, à chaque extrémité respective de la face plane de la partie sensible, une seule jauge de déformation agencée dans un montage en quart 0 de pont, chaque jauge étant disposée sensiblement à 45° d'un axe médian longitudinal de la partie sensible symétriquement par rapport à un axe médian radial de la partie sensible.  According to one embodiment of the invention wherein the ring of the crimping device comprises a single instrumented sensitive portion, the measuring member comprises, at each respective end of the planar face of the sensitive part, a single strain gauge arranged in a quarter bridge assembly, each gauge being disposed substantially at 45 ° of a longitudinal median axis of the sensitive portion symmetrically with respect to a radial central axis of the sensitive portion.
Dans une variante de ce mode de réalisation de l'invention, l'organe de mesure comprend, à chaque extrémité respective de la face plane de la partie5 sensible, deux jauges de déformation agencées dans un montage en demi- pont et disposées sensiblement à 45° d'un axe médian longitudinal de la partie sensible.  In a variant of this embodiment of the invention, the measuring member comprises, at each respective end of the planar face of the sensitive portion, two strain gauges arranged in a half-bridge arrangement and arranged substantially at 45.degree. ° a longitudinal median axis of the sensitive part.
Avantageusement, selon un autre mode de réalisation, la couronne comprend deux lumières, réparties circonférentiellement dans le plan des faces0 annulaires planes opposées, de sorte que chacune des deux lumières s'étende respectivement en vis-à-vis de deux zones d'appui orthogonales de la surface cylindrique interne, de sorte à ménager des première et deuxième parties sensibles s'étendant chacune de part et d'autre du point d'appui du poinçon de sertissage respectivement sur les deux zones d'appui orthogonales. Selon cet autre mode de réalisation où deux parties sensibles de la couronne agencées en face de deux poinçons situés à 90° l'un de l'autre peuvent être instrumentées, l'organe de mesure peut comprendre à chaque extrémité respective de la face plane des première et deuxième parties sensibles, une seule jauge de déformation disposée sensiblement à 45° d'un axe médian longitudinal de la partie sensible symétriquement par rapport à un axe médian radial de la partie sensible, les jauges de déformation d'une première extrémité respective de la face plane des première et deuxième parties sensibles étant agencées dans un montage en demi-pont, et les jauges de déformation d'une seconde extrémité respective de la face plane des première et deuxième parties sensibles sont agencées dans un montage en demi-pont. Advantageously, according to another embodiment, the ring comprises two lumens distributed circumferentially in the plane of the opposite planar annular faces, so that each of the two lumens extends respectively opposite two orthogonal support zones. the inner cylindrical surface, so as to provide first and second sensitive portions each extending on either side of the fulcrum of the crimping punch respectively on the two orthogonal support zones. According to this other embodiment where two sensitive portions of the ring arranged opposite two punches located at 90 ° to each other can be instrumented, the measuring member can comprise at each respective end of the flat face of first and second sensitive parts, a single strain gauge disposed substantially at 45 ° to a longitudinal central axis of the sensitive portion symmetrically with respect to a radial central axis of the sensitive portion, the deformation gauges of a respective first end of the planar face of the first and second sensitive portions being arranged in a half-bridge arrangement, and the strain gauges of a respective second end of the planar face of the first and second sensitive portions are arranged in a half-bridge arrangement.
Selon une variante de cet autre mode de réalisation, l'organe de mesure comprend, à chaque extrémité respective de la face plane des première et deuxième parties sensibles, deux jauges de déformation disposées sensiblement à 45° d'un axe médian longitudinal de la partie sensible, les jauges de déformation d'une première extrémité respective de la face plane des première et deuxième parties sensibles étant agencées dans un montage en pont complet, et les jauges de déformation d'une seconde extrémité respective de la face plane des première et deuxième parties sensibles sont agencées dans un montage en pont complet.  According to a variant of this other embodiment, the measuring member comprises, at each respective end of the plane face of the first and second sensitive parts, two strain gauges disposed substantially at 45 ° to a longitudinal central axis of the part. sensitively, the strain gauges of a respective first end of the planar face of the first and second sensing portions being arranged in a full bridge arrangement, and the strain gauges of a respective second end of the planar face of the first and second sensitive parts are arranged in a full bridge arrangement.
Avantageusement, chaque partie sensible présente une épaisseur de matière dans sa partie médiane sensiblement plus grande qu'à ses extrémités, de manière à minimiser le niveau de déformation mécanique dans la zone médiane de la partie sensible.  Advantageously, each sensitive portion has a thickness of material in its median portion substantially greater than at its ends, so as to minimize the level of mechanical deformation in the middle zone of the sensitive portion.
D'autres caractéristiques et avantages de l'invention ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels:  Other characteristics and advantages of the invention will emerge clearly from the description which is given hereinafter, by way of indication and in no way limitative, with reference to the appended drawings, in which:
- la Figure 1 illustre schématiquement un dispositif de sertissage selon l'invention ; et  - Figure 1 schematically illustrates a crimping device according to the invention; and
- la Figure 2 illustre schématiquement un mode de réalisation pour l'instrumentation de la couronne du dispositif de sertissage modifiée conformément à l'invention. Comme représenté à la figure 1 , le dispositif de sertissage 1 est constitué d'une couronne 2 d'axe 21 , se présentant sous la forme d'un anneau épais à deux faces annulaires planes opposées 20 (une seule étant visible sur la figure 1. La couronne comprend également une surface interne 22 de forme cylindrique, qui présente un profil périodique. Selon l'exemple de la figure 1 , cette surface interne cylindrique 22 comprend quatre portions actives identiques s'étendant chacune sur 90° autour de l'axe 21 et présentant chacune un profil délimitant une zone d'appui, respectivement 220 à 223. - Figure 2 schematically illustrates an embodiment for the instrumentation of the crown of the crimping device modified according to the invention. As shown in FIG. 1, the crimping device 1 consists of a ring 2 with an axis 21, in the form of a thick ring with two opposite planar annular faces 20 (only one being visible in FIG. 1 The ring also comprises an inner surface 22 of cylindrical shape, which has a periodic profile, according to the example of FIG. 1, this cylindrical inner surface 22 comprises four identical active portions each extending over 90 ° about the axis. 21 and each having a profile defining a bearing zone, respectively 220 to 223.
Un organe porte-poinçons 3 est monté à rotation à l'intérieur de la couronne et supporte quatre poinçons de sertissage identiques 31 respectivement reçus dans quatre logements 32 formés dans l'organe porte- poinçons 3 et s'étendant radialement par rapport à l'axe 21 selon quatre axes coplanaires et angulairement espacés de 90°. Chaque poinçon 31 est monté mobile dans son logement respectif et comporte une partie d'extrémité 310, qui est prévue pour glisser sur une zone d'appui respective 220 à 223 de la surface interne cylindrique 22 de la couronne 2 contre laquelle elle s'appuie. Ainsi, au cours d'une opération de sertissage, un mouvement en rotation relatif de l'organe porte-poinçons 3 et de la couronne 2 génère des efforts exercés par la couronne 2 sur les poinçons 31 et entraîne un déplacement centripète des poinçons. Pour ce faire, le dispositif de sertissage peut comporter deux bras non représentés sur la figure 1 , montés pivotant l'un par rapport à l'autre selon l'axe 21 , l'un étant solidaire de la couronne 2 et l'autre étant solidaire de l'organe porte-poinçons 3.  A punch holder member 3 is rotatably mounted within the ring gear and supports four identical crimping punches 31 respectively received in four housings 32 formed in the punch holder member 3 and extending radially with respect to the axis 21 along four axes coplanar and angularly spaced 90 °. Each punch 31 is movably mounted in its respective housing and has an end portion 310, which is provided to slide on a respective bearing area 220 to 223 of the cylindrical inner surface 22 of the ring 2 against which it relies . Thus, during a crimping operation, a relative rotational movement of the punch holder member 3 and the ring gear 2 generates forces exerted by the ring gear 2 on the punches 31 and causes a centripetal movement of the punches. To do this, the crimping device may comprise two arms not shown in Figure 1, pivotally mounted relative to each other along the axis 21, one being secured to the ring 2 and the other being secured to the punch holder member 3.
Selon l'invention, on propose de configurer la couronne 2 pour permettre son instrumentation avec des jauges de déformation de telle manière qu'on puisse mesurer à la fois l'intensité des efforts exercés par les poinçons sur la couronne au cours d'une opération de sertissage et la position de leur application au niveau de la surface interne cylindrique de la couronne. Le principe de mesure sur lequel repose l'invention consiste à mesurer la déformation provoquée par le cisaillement de deux sections placées de part et d'autre du point d'appui d'un poinçon sur la surface cylindrique interne de la couronne.  According to the invention, it is proposed to configure the ring 2 to allow its instrumentation with strain gauges so that it is possible to measure both the intensity of the forces exerted by the punches on the ring during an operation. crimping and the position of their application at the cylindrical inner surface of the crown. The measurement principle on which the invention is based is to measure the deformation caused by the shearing of two sections placed on either side of the fulcrum of a punch on the inner cylindrical surface of the crown.
Pour ce faire, on usine, par exemple par électro-érosion, au niveau d'au moins une première portion active de la couronne 2 en face d'un poinçon de sertissage 31 , une première lumière 23 s'étendant dans le plan des faces annulaires planes opposées 20 suivant un trajet courbe sensiblement parallèle à la surface cylindrique interne 22, à distance de cette dernière et en vis-à-vis de la zone d'appui correspondante 220 de la première portion active sur toute la longueur de celle-ci. Cette opération d'usinage permet ainsi de délimiter, entre la surface cylindrique interne 22 de la couronne 2 et la lumière 23, pratiquée de part en part dans l'épaisseur axiale de la couronne 2 entre ses deux faces annulaires planes opposées 20, une première partie sensible 230, qui s'étend de part et d'autre d'un point d'appui du poinçon de sertissage 31 sur la zone d'appui 220 correspondante, et sur laquelle sont destinées à s'effectuer les mesures de l'effort exercé par le poinçon 31 sur la zone d'appui 220 de la surface cylindrique interne 22 de la couronne 2 et de la position du point d'application de cet effort au niveau de la zone d'appui, comme il sera vu plus en détail par la suite. To do this, it is machined, for example by electro-erosion, at at least a first active portion of the ring 2 in front of a punch of crimping 31, a first lumen 23 extending in the plane of the opposite planar annular faces 20 along a curved path substantially parallel to the internal cylindrical surface 22, at a distance from the latter and facing the bearing zone corresponding 220 of the first active portion over the entire length thereof. This machining operation thus makes it possible to define, between the inner cylindrical surface 22 of the ring 2 and the slot 23, formed right through the axial thickness of the ring 2 between its two opposite flat annular faces 20, a first sensitive portion 230, which extends on either side of a fulcrum of the crimping punch 31 on the corresponding bearing zone 220, and on which are intended to be carried out the measurements of the effort exerted by the punch 31 on the bearing zone 220 of the inner cylindrical surface 22 of the crown 2 and the position of the point of application of this force at the bearing zone, as will be seen in more detail thereafter.
De préférence, la lumière 23 s'étend à distance de la surface cylindrique interne 22, de sorte que la partie sensible 230 ainsi créée présente une épaisseur de matière h telle qu'elle est apte à subir une déformation mesurable avec des moyens peu coûteux et conduisant à des niveaux de contrainte n'entraînant pas de déformations permanentes dans les zones de concentration de contrainte voisines.  Preferably, the lumen 23 extends at a distance from the inner cylindrical surface 22, so that the sensitive portion 230 thus created has a thickness of material h such that it is capable of undergoing measurable deformation with inexpensive means and leading to stress levels that do not result in permanent deformations in adjacent stress zones.
Pour pouvoir connaître précisément les efforts sur les quatre poinçons de sertissage, il est souhaitable d'instrumenter la couronne 2 au niveau de deux poinçons 31 situés à 90° l'un de l'autre. En effet, deux poinçons de sertissage opposés exercent des efforts voisins, de sorte qu'en instrumentant la couronne 2 au niveau de deux zones d'appui orthogonales de la surface cylindrique interne 22 de la couronne 2, par exemple les zones d'appui 220 et 221 , il est possible d'obtenir une information valable de l'effort de sertissage moyen sur tous les poinçons. Pour ce faire, on usine une deuxième lumière 24, qui s'étend dans le plan des faces annulaires planes opposées 20 suivant un trajet courbe sensiblement parallèle à la surface cylindrique interne 22, à distance de cette dernière, en vis-à-vis de la zone d'appui correspondante 221 disposée orthogonalement à la zone d'appui 220 en face de laquelle est ménagée la première lumière 23, de sorte à délimiter au niveau de la couronne 2, entre la surface cylindrique interne 22 et la deuxième lumière 24, une deuxième partie sensible 240, qui s'étend de part et d'autre d'un point d'appui du poinçon de sertissage 31 sur la zone d'appui 221 , sur toute la longueur de celle-ci. In order to know precisely the forces on the four crimping punches, it is desirable to instrument the crown 2 at two punches 31 located at 90 ° to one another. Indeed, two opposite crimping punches exert similar forces, so that by instrumenting the ring 2 at two orthogonal support zones of the inner cylindrical surface 22 of the ring 2, for example the bearing zones 220 and 221, it is possible to obtain valid information of the average crimping force on all the punches. To do this, a second lumen 24 is machined, which extends in the plane of the opposite planar annular faces 20 along a curved path substantially parallel to the internal cylindrical surface 22, at a distance from the latter, opposite the the corresponding bearing zone 221 disposed orthogonally to the bearing zone 220 in front of which the first lumen 23 is formed, so as to delimit at the level of the crown 2, between the internal cylindrical surface 22 and the second lumen 24, a second part 240, which extends on either side of a fulcrum of the crimping punch 31 on the bearing zone 221, over the entire length thereof.
Ces première et deuxième parties sensibles 230 et 240 ainsi créées au moyen respectivement des première et deuxième lumières 23 et 24 réparties circonférentiellement sur la couronne selon une distribution à 90°, comportent chacune deux faces planes opposées 231 et 241 s'étendant respectivement dans le plan des deux faces annulaires planes opposées 20 de la couronne 2 et une portion courbe formée par la zone d'appui correspondante 220 et 221 de la surface cylindrique interne 22 de la couronne 2 sur laquelle vient glisser le poinçon de sertissage 31.  These first and second sensitive portions 230 and 240 thus created by respectively the first and second slots 23 and 24 distributed circumferentially on the ring in a 90 ° distribution, each comprise two opposite planar faces 231 and 241 respectively extending in the plane two opposite planar annular faces 20 of the ring gear 2 and a curved portion formed by the corresponding bearing area 220 and 221 of the inner cylindrical surface 22 of the ring gear 2 on which the crimping punch 31 slides.
Chaque partie sensible 230 et 240 de la couronne 2 présente ainsi une forme particulièrement avantageuse, en ce qu'elle peut être assimilée à une poutre en flexion encastrée à chacune de ses extrémités, respectivement A et B et A' et B' comme illustré à la figure 1 , qui supporte la charge appliquée par le poinçon de sertissage au niveau de la zone d'appui correspondante. Aussi, chaque partie sensible 230 et 240 ménagée au niveau de la couronne 2 peut être utilisée comme corps d'épreuve supportant des jauges de déformation, qui émettent des signaux de déformation lorsque le corps d'épreuve est déformé sous l'effet de l'application de la charge par le poinçon de sertissage sur la zone d'appui correspondante. Plus précisément, selon l'invention, chaque partie sensible 230 et 240 est instrumentée, sur au moins une de ses deux faces planes opposées 231 et 241 selon la précision désirée, avec des jauges de déformation disposées de façon à mesurer le cisaillement de la section du corps d'épreuve aux deux extrémités de la poutre, respectivement en A et B et en A' et B'.  Each sensitive portion 230 and 240 of the ring 2 thus has a particularly advantageous shape, in that it can be likened to a bending beam recessed at each of its ends, respectively A and B and A 'and B' as illustrated in FIG. Figure 1, which supports the load applied by the crimping punch at the corresponding bearing area. Also, each sensitive portion 230 and 240 formed at the ring 2 can be used as test body supporting strain gauges, which emit deformation signals when the test body is deformed under the effect of the application of the load by the crimping punch on the corresponding support zone. More specifically, according to the invention, each sensitive portion 230 and 240 is instrumented on at least one of its two opposite planar faces 231 and 241 according to the desired accuracy, with strain gauges arranged to measure the shear of the section. of the test body at the two ends of the beam, respectively at A and B and at A 'and B'.
Cette disposition des jauges de déformations installées de façon à être sensible au cisaillement aux deux extrémités de la poutre supportant la charge appliquée par le poinçon sur la zone d'appui correspondante, permet avantageusement de mesurer simultanément la position du poinçon au niveau de la zone d'appui et les efforts qu'il exerce, à l'aide de la mesure des efforts transmis par les extrémités de la poutre. En effet, ce type de positionnement de jauge et le câblage associé entraîne une indépendance du signal délivré par rapport à la position de l'effort le long de la longueur libre de la poutre constituée par la zone d'appui du poinçon de sertissage. La somme des deux efforts mesurés à chaque extrémité représente alors l'effort de sertissage et le rapport ou la différence entre ces deux efforts est utilisé pour déterminer la position du poinçon au niveau de la zone d'appui, sans qu'il soit alors nécessaire d'implanter un capteur de déplacement. Cet agencement contribue donc à diminuer considérablement, la complexité de la réalisation tout en améliorant la fiabilité, la justesse et en diminuant les coûts de réalisation. This arrangement of strain gauges installed so as to be sensitive to shear at both ends of the beam supporting the load applied by the punch to the corresponding bearing area, advantageously makes it possible simultaneously to measure the position of the punch at the level of the zone support and the efforts it exerts, using the measurement of the forces transmitted by the ends of the beam. Indeed, this type of gauge positioning and the associated wiring results in an independence of the signal delivered with respect to the position of the force along the free length of the beam constituted by the bearing zone of the crimping punch. The sum of the two The forces measured at each end then represent the crimping force and the ratio or the difference between these two forces is used to determine the position of the punch at the level of the bearing zone, without it being necessary to implant a displacement sensor. This arrangement therefore contributes to considerably reducing the complexity of the embodiment while improving reliability, accuracy and reducing the costs of production.
Ainsi, soit une partie sensible ménagée dans la couronne comme expliqué ci-dessus, des jauges de déformation, non représentées sur la figure 1 , sont collées aux extrémités respectives d'au moins une de ses faces planes opposées, à proximité des zones d'encastrement de la poutre formée par la partie sensible, et sont reliées à une unité de traitement de données apte à transformer un signal électrique de sortie fourni par les jauges de déformation en signaux représentatifs de l'intensité de l'effort appliqué par le poinçon de sertissage sur la zone d'appui correspondante et de la position du point d'application de cet effort sur cette zone d'appui.  Thus, or a sensitive portion formed in the ring as explained above, strain gauges, not shown in Figure 1, are glued to the respective ends of at least one of its opposite planar faces, near the zones of embedding of the beam formed by the sensitive part, and are connected to a data processing unit capable of transforming an electrical output signal supplied by the strain gauges into signals representative of the intensity of the force applied by the punch of crimping on the corresponding support zone and the position of the point of application of this force on this support zone.
Plusieurs modes de réalisation sont envisageables pour le positionnement des jauges de déformation et leur câblage associé, selon qu'on met en œuvre un capteur formé d'une seule partie sensible instrumentée ou de deux parties sensibles instrumentées réparties orthogonalement et selon qu'on instrumente la ou les parties sensibles sur une seule face ou sur les deux faces planes opposées, en fonction du degré de précision souhaité, mais également de la place disponible pour positionner les jauges.  Several embodiments can be envisaged for the positioning of the strain gauges and their associated wiring, according to whether a sensor formed of a single instrumented sensitive part or of two orthogonally distributed instrumented sensitive parts and according to which the instrument is being instrumented is implemented. or the sensitive parts on one side or on the two opposite flat faces, depending on the degree of precision desired, but also the space available to position the gauges.
Dans le cas où une seule partie sensible est usinée au niveau de la couronne, l'instrumentation minimale de la partie sensible formant corps d'épreuve comporte une jauge de déformation montée à chaque extrémité respective d'une face plane de la partie sensible, où chaque jauge de déformation est agencée dans un montage en quart de pont et est disposée préférentiellement sensiblement à 45° d'un axe médian longitudinal de la partie sensible symétriquement par rapport à un axe médian radial de la partie sensible. Selon une variante, on pourra aussi positionner à chaque extrémité respective de la face plane de la partie sensible, deux jauges de déformation agencées dans un montage en demi-pont et disposées préférentiellement sensiblement à 45° de l'axe médian longitudinal de la partie sensible. La figure 2 montre une vue de détail des deux parties sensibles 230, 240 usinées dans la couronne 2, telles que décrites à la figure 1 et illustre un mode de réalisation du positionnement des jauges de déformation pour l'instrumentation de ces deux parties sensibles 230, 240 formant chacune un corps d'épreuve. In the case where only one sensitive part is machined at the crown, the minimum instrumentation of the sensitive part forming the test body comprises a strain gauge mounted at each respective end of a planar face of the sensitive part, where each strain gauge is arranged in a quarter-bridge assembly and is preferably disposed substantially at 45 ° to a longitudinal median axis of the sensitive portion symmetrically with respect to a radial central axis of the sensitive portion. According to a variant, it is also possible to position at each respective end of the flat face of the sensitive part, two strain gauges arranged in a half-bridge arrangement and preferably disposed substantially at 45 ° to the longitudinal central axis of the sensitive part. . FIG. 2 shows a detailed view of the two sensitive parts 230, 240 machined in the ring 2, as described in FIG. 1 and illustrates an embodiment of the positioning of the strain gauges for the instrumentation of these two sensitive parts 230 , 240 each forming a test body.
Selon le mode de réalisation de ta figure 2, on positionne, à chacune des deux extrémités A, B de la face plane 231 de la première partie sensible 230, une jauge de déformation, respectivement R1 , R2, ces jauges R1 , R2 étant disposées préférentiellement sensiblement à 45° de l'axe médian longitudinal X-X de la première partie sensible 230 symétriquement par rapport à son axe médian radial Y-Y. De la même façon, on positionne, à chacune des deux extrémités A', B' de la face plane 241 de la deuxième partie sensible 240, une jauge de déformation, respectivement R3, R4, ces jauges R3, R4 étant disposées préférentiellement sensiblement à 45° de l'axe médian longitudinal X-X de la deuxième partie sensible 240 symétriquement par rapport à son axe médian radial Y-Y.  According to the embodiment of FIG. 2, at each of the two ends A, B of the plane face 231 of the first sensitive part 230, a strain gauge, respectively R1, R2, is positioned, these gauges R1, R2 being arranged preferably substantially at 45 ° to the longitudinal median axis XX of the first sensitive portion 230 symmetrically with respect to its radial median axis YY. In the same way, at each of the two ends A ', B' of the flat face 241 of the second sensitive portion 240, a strain gauge, respectively R3, R4 is positioned, these gauges R3, R4 preferably being arranged substantially at 45 ° of the longitudinal median axis XX of the second sensitive portion 240 symmetrically with respect to its radial median axis YY.
Les jauges de déformation R1 et R3 positionnées respectivement aux extrémités A et A' de la face plane 231 , 241 des première et deuxième parties sensibles 230, 240 sont agencées dans un montage en demi-pont, et les jauges de déformation R2 et R4 positionnés respectivement aux extrémités B et B' de la face plane 231 , 241 des première et deuxième parties sensibles230, 240 sont agencées dans un montage en demi-pont.  The strain gauges R1 and R3 respectively positioned at the ends A and A 'of the planar face 231, 241 of the first and second sensitive portions 230, 240 are arranged in a half-bridge arrangement, and the strain gauges R2 and R4 positioned. respectively at the ends B and B 'of the planar face 231, 241 of the first and second sensitive portions 230, 240 are arranged in a half-bridge arrangement.
Idéalement, selon une variante non représentée, si la place disponible est suffisante, il est utilisé deux jauges de déformation disposées préférentiellement sensiblement à 45° par extrémité, sur une face plane de chaque corps d'épreuve. Selon cette variante, les jauges de déformation des extrémités respectives A et A' de la face plane 231 , 241 des première et deuxième parties sensibles 230, 240 sont agencées dans un montage en pont complet et les jauges de déformation des extrémités respectives B et B' de la face plane 231 , 241 des première et deuxième parties sensibles 230, 240 sont agencées dans un montage en pont complet.  Ideally, according to a variant not shown, if the available space is sufficient, it is used two strain gauges preferably disposed substantially at 45 ° by end, on a flat face of each test body. According to this variant, the strain gauges of the respective ends A and A 'of the plane face 231, 241 of the first and second sensitive parts 230, 240 are arranged in a complete bridge assembly and the strain gauges of the respective ends B and B of the planar face 231, 241 of the first and second sensitive portions 230, 240 are arranged in a full bridge arrangement.
L'instrumentation avec des jauges de déformation de la ou des parties sensibles peut également être doublée de part et d'autre de chaque partie sensible, en positionnant les jauges de la manière qui vient d'être décrite selon les différents exemples de réalisation sur chacune des deux faces planes opposées de la ou des parties sensibles. The instrumentation with strain gauges of the sensitive part or parts can also be doubled on either side of each sensitive part, by positioning the gauges in the manner just described according to the various embodiments on each of the two opposite planar faces of the at least one sensitive portion.
Quel que soit le choix d'instrumentation, l'ensemble de jauges de déformation à utiliser peut être réalisé en une seule pièce qui intègre toutes les jauges, le câblage en pont et les plots de soudure pour la liaison avec l'électronique. Cet ensemble est ensuite positionné et collé sur une seule face annulaire plane de la couronne ou sur les deux faces annulaires planes opposées, de manière à instrumenter la ou les parties sensibles formant corps d'épreuve conformément aux exemples de réalisation décrits plus haut. Dans un souci d'optimisation cet ensemble comportant les jauges de déformation, le câblage en pont et les plots de soudures peut également recevoir l'électronique de numérisation du (ou des) signal(aux) délivré(s) par les jauges de déformation ce qui permet de simplifier la liaison filaire (3 fils) avec l'électronique de traitement des données.  Regardless of the choice of instrumentation, the set of strain gauges to be used can be made in one piece that integrates all the gauges, the bridge wiring and the solder pads for the connection with the electronics. This assembly is then positioned and glued on a single flat annular face of the ring or on the two opposite planar annular faces, so as to instrument the sensing part or parts forming test body according to the embodiments described above. For the sake of optimization, this assembly including the strain gauges, the bridge wiring and the solder pads can also receive the digitizing electronics of the signal (s) delivered by the strain gauges. which makes it possible to simplify the wired link (3 wires) with the data processing electronics.
Comme indiqué précédemment, chaque lumière 23, 24 est usinée au niveau de la couronne 2 à une certaine distance de la zone d'appui correspondante 220, 221 de la surface cylindrique interne 22, de sorte à laisser une épaisseur de matière h dans le profil de la zone d'appui correspondante. Cette épaisseur de matière correspond à l'épaisseur de la poutre ainsi formée, qui supporte la charge appliquée par le poinçon de sertissage 31 lors de son glissement au niveau de la zone d'appui correspondante 220, 221 lors de l'opération de sertissage et la valeur de de cette épaisseur de matière h peut être déterminée par rapport à la hauteur de matière constituant le profil de couronne au niveau de la zone d'appui correspondante, de manière à avoir un niveau de déformation mécanique de la partie sensible permettant un fonctionnement optimal des jauges de déformation collées au niveau des extrémités de la ou des faces planes opposées de la partie sensible. En pratique, cette valeur peut être déterminée en faisant un calcul du comportement mécanique de la partie sensible de manière que les contraintes et les déformations mécaniques maximales soient acceptables et ne risquent pas de conduire à des endommagements par fatigue mais d'un autre côté soient suffisamment élevées pour obtenir un signal électrique de mesure exploitable par l'unité de traitement. Comme représenté plus particulièrement à la figure 2, la géométrie de la poutre formée par chaque partie sensible formant corps d'épreuve peut être optimisée pour améliorer le résultat des mesures. En particulier, l'épaisseur de matière constituant la partie sensible peut varier le long du profil de la zone d'appui correspondante, de manière à minimiser les déformations dans sa partie médiane (i.e. dans une zone sensiblement autour de l'axe médian radial). Pour ce faire, la lumière correspondante est usinée de sorte que la zone sensible présente une épaisseur de matière dans sa partie médiane sensiblement plus grande qu'à ses extrémités. As indicated above, each lumen 23, 24 is machined at the level of the crown 2 at a certain distance from the corresponding bearing zone 220, 221 of the internal cylindrical surface 22, so as to leave a thickness of material h in the profile. of the corresponding support zone. This thickness of material corresponds to the thickness of the beam thus formed, which supports the load applied by the crimping punch 31 during its sliding at the corresponding bearing zone 220, 221 during the crimping operation and the value of this thickness of material h can be determined with respect to the height of material constituting the crown profile at the corresponding bearing area, so as to have a level of mechanical deformation of the sensitive part allowing operation optimal deformation gauges glued at the ends of the or opposite planar faces of the sensitive portion. In practice, this value can be determined by making a calculation of the mechanical behavior of the sensitive part so that the maximum stresses and mechanical strains are acceptable and do not risk leading to fatigue damage but on the other hand are sufficiently high to obtain an electrical measurement signal usable by the processing unit. As shown more particularly in FIG. 2, the geometry of the beam formed by each test body sensitive portion can be optimized to improve the result of the measurements. In particular, the material thickness constituting the sensitive portion can vary along the profile of the corresponding support zone, so as to minimize the deformations in its median part (ie in a zone substantially around the radial median axis) . To do this, the corresponding light is machined so that the sensitive area has a material thickness in its median portion substantially greater than at its ends.

Claims

REVENDICATIONS
1. Dispositif (1) de sertissage comprenant un organe porte-poinçons (3) entouré par une couronne (2), montés à rotation l'un par rapport à l'autre autour d'un axe de sertissage (21), la couronne (2) présentant deux faces annulaires planes opposées (20) et une surface cylindrique interne (22) formée d'au moins quatre portions actives identiques s'étendant chacune sur 90° et présentant chacune un profil délimitant une zone d'appui (220-223) contre laquelle est destinée à glisser l'extrémité (310) d'un poinçon de sertissage (31) monté mobile dans un logement (32) de l'organe porte-poinçons (3) s'étendant radialement par rapport à l'axe de sertissage (21), de sorte qu'un mouvement en rotation relatif de l'organe porte-poinçons (3) et de la couronne (2) entraîne un déplacement centripète des poinçons de sertissage (31), le dispositif étant caractérisé en ce que la couronne (2) est pourvue d'au moins une lumière (23) s'étendant dans le plan des faces annulaires planes opposées (20) suivant un trajet courbe sensiblement parallèle à la surface cylindrique interne (22), en vis- à-vis de la zone d'appui (220) d'une portion active de la surface cylindrique interne(22), de sorte à ménager au moins une partie sensible (230) entre ladite au moins une lumière (23) et la zone d'appui (220), qui s'étend de part et d'autre d'un point d'appui du poinçon de sertissage sur la zone d'appui (220), la partie sensible (230) étant apte à se déformer sous l'action d'un effort appliqué par le poinçon de sertissage (31) sur la zone d'appui (220) et ayant deux faces planes opposées (231) dont l'une au moins est équipée d'un organe de mesure comprenant au moins une jauge de déformation disposée aux extrémités respectives de ladite face plane (231) dans un pont de Wheatstone sensible principalement au cisaillement d'une section de la partie sensible (230) à proximité desdites extrémités respectives résultant de la déformation engendrée par l'effort exercé par le poinçon de sertissage (31) sur la zone d'appui (220), ledit organe de mesure étant relié à une unité de traitement de données apte à transformer des signaux de déformation émis par les jauges de déformation en signaux représentatifs de l'intensité de l'effort et de la position du point d'application de cet effort sur la zone d'appui. 1. Device (1) crimping comprising a punch holder member (3) surrounded by a ring (2), rotatably mounted relative to each other about a crimping axis (21), the crown (2) having two opposite planar annular faces (20) and an inner cylindrical surface (22) formed of at least four identical active portions each extending over 90 ° and each having a profile delimiting a bearing zone (220- 223) against which is intended to slide the end (310) of a crimping punch (31) movably mounted in a housing (32) of the punch holder member (3) extending radially relative to the crimping axis (21), so that a relative rotational movement of the punch holder member (3) and the ring gear (2) causes a centripetal movement of the crimping punches (31), the device being characterized in that the crown (2) is provided with at least one lumen (23) extending in the plane of the annular faces opposed planes (20) along a curved path substantially parallel to the inner cylindrical surface (22), opposite the bearing zone (220) of an active portion of the inner cylindrical surface (22), so as to arrange at least one sensitive portion (230) between said at least one lumen (23) and the bearing zone (220), which extends on either side of a bearing point of the punch of crimping on the support zone (220), the sensitive part (230) being able to deform under the action of a force applied by the crimping punch (31) on the bearing zone (220) and having two opposite planar faces (231), at least one of which is equipped with a measuring member comprising at least one strain gauge disposed at the respective ends of said planar face (231) in a Wheatstone bridge which is sensitive mainly to shearing. a section of the sensitive portion (230) near said respective ends resulting from the deformation generated by the force exerted by the crimping punch (31) on the bearing zone (220), said measuring member being connected to a data processing unit capable of transforming deformation signals transmitted by the strain gauges into signals representative of the intensity of the effort and the position of the point of application of this effort on the support zone.
2. Dispositif selon la revendication 1 , caractérisé en ce que l'organe de mesure est implanté de part et d'autre de la partie sensible (230) sur chacune des deux faces planes opposées (231) de la partie sensible (230). 2. Device according to claim 1, characterized in that the measuring member is located on either side of the sensitive portion (230) on each of the two opposite planar faces (231) of the sensitive portion (230).
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'organe de mesure comprend, à chaque extrémité respective (A, B) de la face plane (231) de la partie sensible (230), une seule jauge de déformation agencée dans un montage en quart de pont, chaque jauge étant disposée sensiblement à 45° d'un axe médian longitudinal (X-X) de la partie sensible (230) symétriquement par rapport à un axe médian radial (Y-Y) de la partie sensible (230).  3. Device according to claim 1 or 2, characterized in that the measuring member comprises, at each respective end (A, B) of the flat face (231) of the sensitive portion (230), a single strain gauge. arranged in a quarter-bridge arrangement, each gauge being disposed substantially at 45 ° to a longitudinal median axis (XX) of the sensitive portion (230) symmetrically with respect to a radial center axis (YY) of the sensitive portion (230) ).
4. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'organe de mesure comprend, à chaque extrémité respective (A, B) de la face plane (231) de la partie sensible (230), deux jauges de déformation agencées dans un montage en demi-pont et disposées sensiblement à 45° d'un axe médian longitudinal (X-X) de la partie sensible.  4. Device according to claim 1 or 2, characterized in that the measuring member comprises, at each respective end (A, B) of the planar face (231) of the sensitive portion (230), two strain gauges arranged in a half-bridge arrangement and disposed substantially at 45 ° of a longitudinal median axis (XX) of the sensitive portion.
5. Dispositif selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que la couronne comprend deux lumières (23, 24), réparties circonférentiellement dans le plan des faces annulaires planes opposées (20), de sorte que chacune des deux lumières (23, 24) s'étende respectivement en vis-à-vis de deux zones d'appui (220, 221) orthogonales de la surface cylindrique interne (22), de sorte à ménager des première et deuxième parties sensibles (230, 240) s'étendant chacune de part et d'autre du point d'appui du poinçon de sertissage (31) respectivement sur les deux zones d'appui (220, 221) orthogonales.  5. Device according to any one of claims 1 or 2, characterized in that the ring comprises two slots (23, 24), distributed circumferentially in the plane of the opposite planar annular faces (20), so that each of the two lights (23, 24) extends respectively opposite two orthogonal bearing areas (220, 221) of the inner cylindrical surface (22), so as to provide first and second sensitive portions (230, 240 ) each extending on either side of the fulcrum of the crimping punch (31) respectively on the two orthogonal support zones (220, 221).
6. Dispositif selon la revendication 5, caractérisé en ce que l'organe de mesure comprend, à chaque extrémité respective (A, B ; A', B') de la face plane (231 , 241) des première et deuxième parties sensibles (230, 240), une seule jauge de déformation (R1-R4) disposée sensiblement à 45° d'un axe médian longitudinal (X-X) de la partie sensible symétriquement par rapport à un axe médian radial (Y- Y) de la partie sensible, les jauges de déformation (R1 , R3) d'une première extrémité respective (A, A') de la face plane (231 , 241) des première et deuxième parties sensibles (230, 240) étant agencées dans un montage en demi-pont, et les jauges de déformation (R2, R4) d'une seconde extrémité respective (B, B') de la face plane (231 , 241) des première et deuxième parties sensibles (230, 240) sont agencées dans un montage en demi-pont. 6. Device according to claim 5, characterized in that the measuring member comprises, at each respective end (A, B; A ', B') of the plane face (231, 241) of the first and second sensitive parts ( 230, 240), a single strain gauge (R1-R4) disposed substantially at 45 ° to a longitudinal central axis (XX) of the sensitive portion symmetrically with respect to a radial median axis (Y-Y) of the sensitive portion , the strain gauges (R1, R3) of a respective first end (A, A ') of the planar face (231, 241) of the first and second sensitive portions (230, 240) being arranged in a half-turn arrangement. bridge, and the strain gauges (R2, R4) of a respective second end (B, B ') of the planar face (231, 241) of the first and second second sensitive portions (230, 240) are arranged in a half-bridge arrangement.
7. Dispositif selon la revendication 5, caractérisé en ce que l'organe de mesure comprend, à chaque extrémité respective (A, B ; A', B') de la face plane (231 , 241) des première et deuxième parties sensibles (230, 240), deux jauges de déformation disposées sensiblement à 45° d'un axe médian longitudinal (X-X) de la partie sensible, les jauges de déformation d'une première extrémité respective (A, A') de ia face plane (231 , 241) des première et deuxième parties sensibles (230, 240) étant agencées dans un montage en pont complet, et les jauges de déformation d'une seconde extrémité respective (B, B') de la face plane (231 , 241) des première et deuxième parties sensibles (230, 240) sont agencées dans un montage en pont complet.  7. Device according to claim 5, characterized in that the measuring member comprises, at each respective end (A, B; A ', B') of the plane face (231, 241) of the first and second sensitive parts ( 230, 240), two strain gauges disposed substantially at 45 ° to a longitudinal central axis (XX) of the sensitive part, the strain gauges of a respective first end (A, A ') of the plane face (231 241) of the first and second sensitive portions (230, 240) being arranged in a full bridge arrangement, and the strain gauges of a respective second end (B, B ') of the planar face (231, 241) of first and second responsive portions (230, 240) are arranged in a full bridge arrangement.
8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque partie sensible (230, 240) présente une épaisseur de matière dans sa partie médiane sensiblement plus grande qu'à ses extrémités, de manière à minimiser ie niveau de déformation mécanique dans la zone médiane de la partie sensible.  8. Device according to any one of the preceding claims, characterized in that each sensitive portion (230, 240) has a material thickness in its middle portion substantially greater than at its ends, so as to minimize the level of deformation mechanical in the middle zone of the sensitive part.
PCT/FR2013/050580 2012-03-21 2013-03-19 Instrumented cam crimping device WO2013140084A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1252526 2012-03-21
FR1252526A FR2988531B1 (en) 2012-03-21 2012-03-21 INSTRUMENTED CAM CRIMPING DEVICE

Publications (1)

Publication Number Publication Date
WO2013140084A1 true WO2013140084A1 (en) 2013-09-26

Family

ID=48237060

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2013/050580 WO2013140084A1 (en) 2012-03-21 2013-03-19 Instrumented cam crimping device

Country Status (2)

Country Link
FR (1) FR2988531B1 (en)
WO (1) WO2013140084A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015185174A1 (en) * 2014-06-06 2015-12-10 Uniflex-Hydraulik Gmbh Radial press

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415831A1 (en) 1989-08-31 1991-03-06 AEROSPATIALE Société Nationale Industrielle Device for crimping connecting elements on electrical conductors and automatic crimping assembly comprising such a device
FR2743449A1 (en) * 1996-01-10 1997-07-11 Euritech Sarl PORTABLE TOOL FOR CRIMPING CONNECTION PIN ON ELECTRICAL CONDUCTORS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415831A1 (en) 1989-08-31 1991-03-06 AEROSPATIALE Société Nationale Industrielle Device for crimping connecting elements on electrical conductors and automatic crimping assembly comprising such a device
FR2743449A1 (en) * 1996-01-10 1997-07-11 Euritech Sarl PORTABLE TOOL FOR CRIMPING CONNECTION PIN ON ELECTRICAL CONDUCTORS

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015185174A1 (en) * 2014-06-06 2015-12-10 Uniflex-Hydraulik Gmbh Radial press
CN106573288A (en) * 2014-06-06 2017-04-19 尤尼弗莱克斯-液压有限责任公司 Radial press
US10286620B2 (en) 2014-06-06 2019-05-14 Uniflex Hydraulik Gmbh Radial press
RU2696116C2 (en) * 2014-06-06 2019-07-31 Юнифлекс-Хидраулик Гмбх Radial press
CN106573288B (en) * 2014-06-06 2019-12-17 尤尼弗莱克斯-液压有限责任公司 Radial press

Also Published As

Publication number Publication date
FR2988531A1 (en) 2013-09-27
FR2988531B1 (en) 2015-03-20

Similar Documents

Publication Publication Date Title
EP0918213B1 (en) Device for measuring the axial load on a turning shaft
FR2956738A1 (en) DEVICE FOR MEASURING TORSIONS, FLEXIONS OR OTHER DEFORMATIONS AND METHOD FOR MANUFACTURING SUCH A DEVICE
EP1053456B1 (en) Torque sensor and steering column equipped with same
FR2845469A1 (en) ANALOGUE POSITION SENSOR WITH VARIABLE RELUCTANCE
WO2019081834A1 (en) Torque sensor for a rotating element using a mechanical friction coupling
FR2834063A1 (en) WEIGHT MEASURING DEVICE ACTING ON A VEHICLE SEAT AND FITTING THE SEAT THEREFOR
FR2816047A1 (en) BEARING DEVICE WITH INSTRUMENT BEARING, IN PARTICULAR FOR CONTROL WHEEL
FR2888339A1 (en) OPTICAL FIBER SEISMIC SENSOR
FR3084124A1 (en) ROLLER SCREW MECHANISM WITH SURFACE SOUND WAVE TYPE SENSOR
WO2013140084A1 (en) Instrumented cam crimping device
FR2837920A1 (en) EXTENSOMETRIC MEASURING DEVICE
EP2114624B1 (en) Screwing device including one or more torque sensors for measuring deformations in a plane perpendicular to the revolution axis, and corresponding sensor holder
FR3051905A1 (en) SENSOR FOR MEASURING A TIGHTENING STRENGTH APPLIED TO A SCREW ASSEMBLY
FR3031722A1 (en) DEVICE FOR DETERMINING THE TORQUE APPLIED TO A PEDAL AXIS
EP2996930B1 (en) Bicycle pedal provided with at least one sensor
WO2016169645A1 (en) Sensor for measuring the torque of a drive shaft
EP3428055B1 (en) Method and device for determining the direction and the amplitude of a force applied to a propulsion pod of a boat
FR3123434A1 (en) Motor vehicle torque sensor
FR2948758A1 (en) Surface roughness controlling device for bearing of e.g. spindle of crankshaft, has sensors angularly distributed in determined angular sector in regular and symmetric manner with respect to bisecting line of sector
EP3388808B1 (en) Device for detecting pressure with mechanical uncoupling
FR2708101A1 (en) Two-way force sensor and application especially to the measurement of a force torsor.
FR3053115B1 (en) TOUCH SENSOR CAPABLE OF RETRANNING THE TOUCH
WO2023217918A1 (en) Tachometer for an aircraft wheel
FR3114647A1 (en) Motor vehicle torque sensor
WO2021122872A1 (en) Automated screwing or crimping method and device for implementing said method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13719898

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13719898

Country of ref document: EP

Kind code of ref document: A1