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EP1373623A1 - Needle-punching machine equipped with a penetration measuring device - Google Patents

Needle-punching machine equipped with a penetration measuring device

Info

Publication number
EP1373623A1
EP1373623A1 EP02706913A EP02706913A EP1373623A1 EP 1373623 A1 EP1373623 A1 EP 1373623A1 EP 02706913 A EP02706913 A EP 02706913A EP 02706913 A EP02706913 A EP 02706913A EP 1373623 A1 EP1373623 A1 EP 1373623A1
Authority
EP
European Patent Office
Prior art keywords
textile structure
needling
needles
needle
low point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02706913A
Other languages
German (de)
French (fr)
Other versions
EP1373623B1 (en
Inventor
Yvan Baudry
Robert Jean
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Landing Systems SAS
Original Assignee
Messier Bugatti SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Messier Bugatti SA filed Critical Messier Bugatti SA
Publication of EP1373623A1 publication Critical patent/EP1373623A1/en
Application granted granted Critical
Publication of EP1373623B1 publication Critical patent/EP1373623B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/02—Needling machines with needles
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines

Definitions

  • the discs To resist these shear forces which generate a delamination effect, the discs must be manufactured so as to minimize structural heterogeneities. Indeed, a non-uniform disc has local stress zones with heterogeneous characteristics which considerably increase the risks of tearing.
  • the brake discs are made from a reinforcing textile structure, formed by a plurality of superimposed layers and needled by a set of barbed needles penetrating in the z direction, that is to say transversely to the layers.
  • the textile structure is carbonized, densified using a material forming a matrix and is then optionally subjected to a heat treatment.
  • the layers are superimposed on a support.
  • a step-down movement is generally imposed on the support as the different layers are superimposed and needled.
  • the mechanical characteristics of the final product thus obtained strongly depend on the actual needling density chosen for the reinforcing textile structure.
  • real needling density is meant a function of the number of needle barbs per cm 3 seen by an elementary volume of the textile structure, which therefore includes the density needling per unit area, the penetration rate in z, the step of downward movement and the functional characteristics of the needles.
  • Patent application EP 0 695 823 sought to improve knowledge of the penetration depth of the needles by means of feeler rollers measuring the position of the upper surface of the textile structure between the needling operations and arranged laterally relative to the needle working area.
  • the present invention therefore proposes a needling machine and its associated method which overcomes this drawback by allowing a measurement of the real penetration of the needles in the textile structure to be needled taking into account its deformation during the needling operations of the different layers which up.
  • these means for measuring the position of the upper surface of said textile structure comprise an optical assembly for contactless measurement.
  • it is a wide beam type laser transmitter / receiver.
  • these measurement means may include a mechanical contact measurement probe.
  • a sensor is provided, preferably of the inductive or optical type, for determining said low point of maximum penetration of the needles and processing means for controlling the vertical movement of said needling table as a function of the measurement of the position. of the upper surface of the textile structure performed at said low point of maximum needle penetration by said measuring means.
  • the invention also relates to the process implemented in the aforementioned machine as well as the textile structure obtained by this process.
  • the measurement of the position of the upper surface of the textile structure is carried out by means of instantaneous measurements taken in real time over the entire length of the textile structure.
  • FIG. 1 is a schematic view of a first embodiment of a machine for needling textile structures according to the invention
  • FIG. 2 is a schematic view of a second embodiment of a machine for needling textile structures according to the invention.
  • FIG. 3 is a side view of the machine of Figure 2, its right part being shown in a position of maximum insertion of the needles.
  • FIGS. 1 and 2 Two embodiments of a machine allowing the needling of a flat textile structure are shown in FIGS. 1 and 2.
  • the invention is not limited to the sole manufacture of flat structures and that that of forming a structure by winding a fibrous web also finds application with the present invention, whether it is an annular winding of a web or helical fabric in turns superimposed flat, or a winding of a sheet of turns superimposed on a mandrel.
  • the machine conventionally comprises a so-called needling table 10 intended to support layers 12 or plies of width and length determined according to the final structure to be produced, and which will be brought one after the other to be superimposed in successive layers .
  • the table is placed directly above a needling head 14 comprising, mounted on a needle board 16, a determined number of barbed needles 18 of known type, and which can be driven in a vertical reciprocating movement by one or more connecting rod-crank assemblies 20 motorized by a single motor or not .
  • a stripper 22 fixed to a frame 24 of the machine is mounted above the needling table to prevent the textile structure from being entrained when the needles are raised.
  • the table as the stripper are respectively drilled with holes 26, 28 for the passage of needles.
  • the table is movable vertically by means of a drive device 30 consisting for example of a motorized worm.
  • a drive device 30 consisting for example of a motorized worm.
  • Several series of drive rollers 32, 34 (also called input / output presses) arranged upstream and downstream of the machine provide horizontal transport of the textile structure towards the needling head.
  • means 36 for measuring the position of an upper surface of the textile structure are provided, disposed at the level of the needling head 14 and intended to determine the actual penetration of the needles into this textile structure, a low point of maximum needle penetration.
  • the stroke of the needles being constant relative to the frame to which they are connected and the needling table being positioned at a known distance from this frame, it is easy to show that the distance of penetration of the needles into the material textile directly depends on the thickness of material existing between the needling table and the upper surface measured.
  • the measuring means 36 are fixed on the frame 24 and it is provided that the needle board 16 (and the stripper 22) is pierced with an orifice 38 (respectively a passage orifice 40) to allow cooperation of these measuring means with the upper surface of the textile structure.
  • this cooperation can be carried out without contact (with a remote measurement of the position of the upper surface of the textile structure) or with contact (by the descent of a mechanical probe on the upper surface of the textile structure).
  • FIG. 1 illustrates a preferred embodiment of the invention in which these non-contact measurement means consist of an optical measurement assembly such as a laser transmitter / receiver 42.
  • the transmitter directs a laser beam, at through the needle board, towards the upper surface of the textile structure (after having crossed the stripper) which then reflects it towards the receiver. Since the distance from the transmitter to the needling table is assumed to be known by a prior measurement, the determination of the distance from the transmitter to the upper surface of the textile structure, by analyzing the return path of the laser beam, is then sufficient to accurately assess l thickness of the textile structure supported by the needling table.
  • this laser assembly is preferably of the wide beam type (because this laser model by allowing measurements over the entire length of the beam ensures an integration effect) .
  • this laser model by allowing measurements over the entire length of the beam ensures an integration effect.
  • the use of an infrared optical measurement assembly is entirely possible without however being preferred.
  • FIG. 2 illustrates an alternative embodiment in which the measuring means consist of a mechanical feeler formed by an internal piston 44 fixed to the frame 24 and on which an external sleeve 46 can slide, the slightly rounded end of which is intended to come into direct contact with the textile structure (after crossing the needle board and the stripper).
  • This sliding of the sleeve is ensured by the controlled injection of a fluid, preferably compressed air, into the piston from a control module 48 fixed on the frame 24.
  • the pressure of the fluid is adjusted according to the nature of the textile structure to be needled (hardness, rebound reaction) and adjusted so as to avoid any rebound of the sleeve on this textile structure.
  • the sleeve also comprises at its upper part a reflective collar 50 intended to cooperate with an optical measurement assembly such as a laser or infrared transmitter / receiver 52 also fixed on the frame.
  • the emitter directs its radiation towards the collar of the sleeve which then reflects it towards the receiver.
  • the transmitter / receiver distance when the end of the probe is in contact with the needling table, being assumed to be known by a prior measurement, the determination of the transmitter / receiver distance when this end is in contact with the upper surface of the textile structure (by analyzing the return path of the radiated beam) here again suffices to accurately assess the thickness of the textile structure supported by the needling table.
  • the measuring means 36 are preferably arranged in a median plane of the needling head 14 perpendicular to a direction of advance of the textile structure (it is of course not prohibited to s '' deviate significantly). They can be split, when this textile structure is in the form of two adjacent plates advancing parallel to one another under the needling head.
  • the needling head can comprise two boards with independent needles arranged side by side, the measurement means then being placed substantially in the center of each of these boards.
  • this figure 3 shows the machine, in the context of the previous alternative embodiment, in two distinct positions, one (left part of this figure 3) corresponding to a rest position, the head of needling being in the raised position, and the other (right part) corresponding to a position of this head at a low point of maximum needle penetration.
  • the determination of the low point of maximum penetration of the needles is carried out in real time by a sensor 54, for example of the inductive or optical type, integral with the frame and cooperating for example with a determined cam profile 56 of the rod-crank assembly 20 control of the vertical reciprocating movement of the needling head.
  • This cam profile makes it possible to define a period of time (and not just a single instantaneous measurement instant) during the descent of the needle board, preferably in the vicinity of the low point, during which the measurement means 36 will be active and will be able to acquire several measurements from which will be determined, at the level of a processing module 58 connected on the one hand to the sensor 54 and on the other hand to the measurement means 36, a first average value of the thickness needled layers.
  • the needling process implemented in the machine of the invention can be summarized as follows. First of all, superimpose a second layer thickness on a first layer thickness laid on the needling table and bind with barbed needles of a needling head, and according to predetermined conditions, the thicknesses of the two layers thus superimposed, then relatively move the needling table with respect to the needling head by a displacement pitch determined as a function of the position of an upper surface of the two superimposed layers measured at a low point of maximum penetration of the needles by appropriate measurement means, and finally superimpose a third layer thickness on the previous two and link this third layer thickness on the previous two according to the same predetermined conditions. These steps will then be repeated for the following layers until the desired thickness for the textile structure is obtained.
  • the method implemented in the machines described above consists in placing on the table 10 first of all one or even two superposed layers which are then linked by needling by means of the needle board 16 while being moved horizontally over the whole length of the textile structure by feed rollers 32, 34.
  • the table is then lowered by a determined displacement pitch in order to be able to superimpose a third layer which is in turn needled with the other two and so on until obtain the desired thickness.
  • this determined displacement step is not fixed or subject to a predefined law of descent, but it results from the actual penetration of the needles into the preceding layers of the textile structure measured at the low point of maximum penetration of the needles in order to obtain the actual needling density desired for this textile structure, constant or changing density in the thickness of the textile structure.
  • the position of the upper surface of this textile structure is measured at the center of the needles to manage the pitch of descent of the needling table, so that these needles penetrate the textile structure from a determined distance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Sewing Machines And Sewing (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The invention concerns a needle-punching machine for a textile structure consisting of a plurality of superposed layers (12) comprising a vertically mobile needle-punching table (10), a needle-punching head including s specific number of barbed needles (18) and arranged in line with said needle-punching table, and means for driving the needle-punching head to impart thereto a reciprocating vertical movement defining a maximum needle penetration low point, wherein are provided measuring means (36), arranged at said needle-punching head to measure the position of an upper surface of the textile structure at the maximum needle penetration low point. Said measuring means are preferably arranged in a median plane of the needle-punching head perpendicular to a forward moving direction of the textile structure.

Description

Titre de l'inventionTitle of invention
Machine d'aiguilletage munie d'un dispositif de mesure de pénétrationNeedling machine provided with a penetration measuring device
Domaine de l'inventionField of the invention
La présente invention concerne la réalisation de structures textiles aiguilletées destinées à être utilisées dans la fabrication de pièces de protection utilisées aux températures élevées, de parties structurelles de moteurs - fusées ou bien encore de disques de freins à très hautes performances pour l'aviation ou les véhicules terrestres.The present invention relates to the production of needled textile structures intended for use in the manufacture of protective parts used at high temperatures, structural parts of rocket engines or else very high performance brake discs for aviation or land vehicles.
Art antérieurPrior art
On sait que les disques de freins doivent supporter des efforts de freinage créateurs de forces de cisaillement particulièrement importantes. Ce phénomène est accentué dans les aéronefs du fait des contraintes importantes appliquées aux disques de freins.It is known that the brake discs must withstand braking forces which create particularly high shear forces. This phenomenon is accentuated in aircraft due to the significant constraints applied to the brake discs.
Pour résister à ces forces de cisaillement génératrices d'un effet de délamination, les disques doivent être fabriqués de façon à minimiser les hétérogénéités de structure. En effet, un disque non uniforme comporte des zones locales de contrainte aux caractéristiques hétérogènes qui augmentent de façon considérable les risques de déchirement.To resist these shear forces which generate a delamination effect, the discs must be manufactured so as to minimize structural heterogeneities. Indeed, a non-uniform disc has local stress zones with heterogeneous characteristics which considerably increase the risks of tearing.
Classiquement, les disques de freins sont élaborés à partir d'une structure textile de renfort, formée d'une pluralité de couches superposées et aiguilletées par un ensemble d'aiguilles à barbes pénétrant en direction z, c'est à dire transversalement par rapport aux couches. Après découpage, la structure textile est carbonisée, densifiée à l'aide d'un matériau formant une matrice puis est éventuellement soumise à un traitement thermique. Les couches sont superposées sur un support. Un mouvement de descente par pas est généralement imposé au support au fur et à mesure de la superposition et Paiguilletage des différentes couches. Les caractéristiques mécanique du produit final ainsi obtenu dépendent fortement de la densité réelle d'aiguilletage retenue pour la structure textile de renfort. Par densité réelle d'aiguilletage, on entend une fonction du nombre de barbes d'aiguilles par cm3 vu par un volume élémentaire de la structure textile, ce qui inclut donc la densité d'aiguilletage par unité de surface, le taux de pénétration en z, le pas de déplacement en descente et les caractéristiques fonctionnelles des aiguilles.Conventionally, the brake discs are made from a reinforcing textile structure, formed by a plurality of superimposed layers and needled by a set of barbed needles penetrating in the z direction, that is to say transversely to the layers. After cutting, the textile structure is carbonized, densified using a material forming a matrix and is then optionally subjected to a heat treatment. The layers are superimposed on a support. A step-down movement is generally imposed on the support as the different layers are superimposed and needled. The mechanical characteristics of the final product thus obtained strongly depend on the actual needling density chosen for the reinforcing textile structure. By real needling density is meant a function of the number of needle barbs per cm 3 seen by an elementary volume of the textile structure, which therefore includes the density needling per unit area, the penetration rate in z, the step of downward movement and the functional characteristics of the needles.
Or, les procédés d'aiguilletage actuels permettent difficilement d'obtenir cette parfaite uniformité recherchée bien que certains d'entre eux apportent des résultats intéressants, notamment en agissant sur le pas de descente. On peut citer le brevet US 4 790 052 qui propose d'accroître pour chaque couche superposée, la distance entre le support des couches et les aiguilles d'une distance égale à l'épaisseur d'une couche aiguilletée. On peut citer aussi le brevet EP 0 736 115 qui, pour assurer une épaisseur constante des différentes couches superposées, propose d'adopter un pas de déplacement du support de couches variable selon une loi de réduction prédéterminée.However, the current needling methods make it difficult to obtain this perfect uniformity sought although some of them bring interesting results, in particular by acting on the step of descent. Mention may be made of US Pat. No. 4,790,052 which proposes increasing for each superposed layer, the distance between the support of the layers and the needles by a distance equal to the thickness of a needled layer. Mention may also be made of patent EP 0 736 115 which, in order to ensure a constant thickness of the various superimposed layers, proposes to adopt a pitch of displacement of the support for layers variable according to a predetermined reduction law.
L'imperfection de ces procédés provient du fait que ce pas de déplacement en descente du support de couche est en général calculé préalablement de façon théorique, notamment en fonction du nombre de couches devant former la structure textile à obtenir, sans prendre en compte la profondeur de pénétration réelle des aiguilles. Or, la connaissance de ce paramètre est essentielle pour garantir une densité d'aiguilletage uniforme gage d'une parfaite uniformité de la structure textile finale. En outre, plus l'épaisseur de la structure textile est grande plus la connaissance de la profondeur de pénétration est imparfaite.The imperfection of these methods stems from the fact that this step of downward movement of the layer support is generally calculated beforehand theoretically, in particular as a function of the number of layers which must form the textile structure to be obtained, without taking into account the depth actual needle penetration. Now, knowledge of this parameter is essential to guarantee a uniform needling density, which guarantees perfect uniformity of the final textile structure. In addition, the greater the thickness of the textile structure, the more imperfect the knowledge of the penetration depth.
La demande de brevet EP 0 695 823 a cherché à améliorer la connaissance de la profondeur de pénétration des aiguilles au moyen de rouleaux palpeurs mesurant la position de la surface supérieure de la structure textile entre les opérations d'aiguilletage et disposés latéralement par rapport à la zone de travail des aiguilles.Patent application EP 0 695 823 sought to improve knowledge of the penetration depth of the needles by means of feeler rollers measuring the position of the upper surface of the textile structure between the needling operations and arranged laterally relative to the needle working area.
Toutefois, une telle solution n'apparaît pas satisfaisante car, sous l'action des forces d'aiguilletage, il se produit un écrasement de la structure textile que la mesure effectuée ne permet pas de mettre en évidence. Cette absence de prise en compte de la déformation de la structure textile interdit en fait une connaissance exacte de la pénétration réelle des aiguilles. Objet et définition de l'inventionHowever, such a solution does not appear satisfactory because, under the action of needling forces, there is a crushing of the textile structure which the measurement carried out does not make it possible to demonstrate. This failure to take into account the deformation of the textile structure prohibits in fact an exact knowledge of the real penetration of the needles. Object and definition of the invention
La présente invention propose donc une machine d'aiguilletage et son procédé associé qui pallie cet inconvénient en permettant une mesure de la pénétration réelle des aiguilles dans la structure textile à aiguilleter prenant en compte sa déformation lors des opérations d'aiguilletage des différentes couches qui la composent.The present invention therefore proposes a needling machine and its associated method which overcomes this drawback by allowing a measurement of the real penetration of the needles in the textile structure to be needled taking into account its deformation during the needling operations of the different layers which up.
Ce but est atteint par une machine d'aiguilletage d'une structure textile formée d'une pluralité de couches superposées comportant une table d'aiguilletage mobile verticalement, une tête d'aiguilletage comportant un nombre déterminé d'aiguilles à barbes et disposée à l'aplomb de ladite table d'aiguilletage, et des moyens d'entraînement de la tête d'aiguilletage pour lui conférer un mouvement alternatif vertical définissant un point bas de pénétration maximale des aiguilles dans ladite structure textile, caractérisée en ce qu'elle comporte en outre des moyens de mesure, disposés au niveau de ladite tête d'aiguilletage, pour mesurer la position d'une surface supérieure de ladite structure textile audit point bas de pénétration maximale des aiguilles.This object is achieved by a needling machine of a textile structure formed of a plurality of superposed layers comprising a needling table movable vertically, a needling head comprising a determined number of barbed needles and arranged at the plumb of said needling table, and means for driving the needling head to give it a vertical reciprocating movement defining a low point of maximum penetration of the needles in said textile structure, characterized in that it comprises in addition to measuring means, arranged at said needling head, for measuring the position of an upper surface of said textile structure at said low point of maximum needle penetration.
Ainsi, avec cette intégration des moyens de mesure dans la planche à aiguilles permettant une prise en compte de l'écrasement de la structure textile sous l'effet des forces d'aiguilletage, il est possible de déterminer avec précision la profondeur de pénétration réelle des aiguilles.Thus, with this integration of the measurement means in the needle board allowing the crushing of the textile structure to be taken into account under the effect of needling forces, it is possible to precisely determine the actual penetration depth of the needles.
De préférence, ces moyens de mesure sont disposés dans un plan médian de ladite tête d'aiguilletage perpendiculaire à une direction d'avance de ladite structure textile.Preferably, these measuring means are arranged in a median plane of said needling head perpendicular to a direction of advance of said textile structure.
Selon un mode de réalisation préférentiel, ces moyens de mesure de la position de la surface supérieure de ladite structure textile comportent un ensemble optique de mesure sans contact. De préférence, il s'agit d'un émetteur/récepteur laser du type à faisceau large. Selon un mode de réalisation alternatif, ces moyens de mesure peuvent comporter un palpeur mécanique de mesure par contact.According to a preferred embodiment, these means for measuring the position of the upper surface of said textile structure comprise an optical assembly for contactless measurement. Preferably, it is a wide beam type laser transmitter / receiver. According to an alternative embodiment, these measurement means may include a mechanical contact measurement probe.
Avantageusement, il est prévu un capteur, de préférence de type inductif ou optique, pour déterminer ledit point bas de pénétration maximale des aiguilles et des moyens de traitement pour commander le déplacement vertical de ladite table d'aiguilletage en fonction de la mesure de la position de la surface supérieure de la structure textile effectuée audit point bas de pénétration maximaie des aiguilles par lesdits moyens de mesure.Advantageously, a sensor is provided, preferably of the inductive or optical type, for determining said low point of maximum penetration of the needles and processing means for controlling the vertical movement of said needling table as a function of the measurement of the position. of the upper surface of the textile structure performed at said low point of maximum needle penetration by said measuring means.
L'invention concerne également le procédé mis en œuvre dans la machine précitée ainsi que la structure textile obtenue par ce procédé. De préférence, la mesure de la position de la surface supérieure de la structure textile est effectuée en moyennant des mesures instantanées relevées en temps réel sur toute la longueur de la structure textile.The invention also relates to the process implemented in the aforementioned machine as well as the textile structure obtained by this process. Preferably, the measurement of the position of the upper surface of the textile structure is carried out by means of instantaneous measurements taken in real time over the entire length of the textile structure.
Brève description des dessins Les caractéristiques et avantages de la présente invention ressortiront mieux de la description suivante, faite à titre indicatif et non limitatif, en regard des dessins annexés sur lesquels :BRIEF DESCRIPTION OF THE DRAWINGS The characteristics and advantages of the present invention will emerge more clearly from the following description, given by way of non-limiting illustration, with reference to the appended drawings in which:
- la figure 1 est une vue schématique d'un premier mode de réalisation d'une machine pour l'aiguilletage de structures textiles conforme à l'invention,FIG. 1 is a schematic view of a first embodiment of a machine for needling textile structures according to the invention,
- la figure 2 est une vue schématique d'un second mode de réalisation d'une machine pour l'aiguilletage de structures textiles conforme à l'invention, etFIG. 2 is a schematic view of a second embodiment of a machine for needling textile structures according to the invention, and
- la figure 3 est une vue de côté de la machine de la figure 2, sa partie droite étant représentée dans une position d'enfoncement maximal des aiguilles.- Figure 3 is a side view of the machine of Figure 2, its right part being shown in a position of maximum insertion of the needles.
Description détaillée de modes de réalisation préférentielsDetailed description of preferred embodiments
Deux exemples de réalisation d'une machine permettant l'aiguilletage d'une structure textile plane sont représentés aux figures 1 et 2. Bien entendu, il doit être considéré que l'invention ne se limite pas à la seule fabrication de structures planes et que celle consistant à former une structure par enroulement d'une nappe fibreuse trouve aussi application avec la présente invention, qu'il s'agisse d'un enroulement annulaire d'une nappe ou tissu hélicoïdal en spires superposées à plat, ou d'un enroulement d'une nappe en spires superposées sur un mandrin.Two embodiments of a machine allowing the needling of a flat textile structure are shown in FIGS. 1 and 2. Of course, it should be considered that the invention is not limited to the sole manufacture of flat structures and that that of forming a structure by winding a fibrous web also finds application with the present invention, whether it is an annular winding of a web or helical fabric in turns superimposed flat, or a winding of a sheet of turns superimposed on a mandrel.
La machine comporte classiquement une table 10 dite d'aiguilletage destinée à supporter des couches 12 ou nappes de largeur et longueur déterminées en fonction de la structure finale à réaliser, et qui seront amenées l'une après l'autre pour être superposées en couches successives. La table est placée à l'aplomb d'une tête d'aiguilletage 14 comportant, monté sur une planche à aiguilles 16, un nombre déterminé d'aiguilles à barbes 18 de type connu, et qui peut être animée d'un mouvement alternatif vertical par un ou plusieurs ensembles bielle- manivelle 20 motorisés par un moteur unique ou non. Un debourreur 22 fixé sur un bâti 24 de la machine est monté au dessus de la table d'aiguilletage pour empêcher que la structure textile ne soit entraînée lors de la remontée des aiguilles. Bien entendu, la table comme le debourreur sont percés respectivement de trous 26, 28 pour le passage des aiguilles. La table est mobile verticalement au moyen d'un dispositif d'entraînement 30 constitué par exemple d'une vis sans fin motorisée. Plusieurs séries de rouleaux d'entraînement 32, 34 (appelés aussi presses d'entrée/sortie) disposés en amont et en aval de la machine assurent un transport horizontal de la structure textile vers la tête d'aiguilletage.The machine conventionally comprises a so-called needling table 10 intended to support layers 12 or plies of width and length determined according to the final structure to be produced, and which will be brought one after the other to be superimposed in successive layers . The table is placed directly above a needling head 14 comprising, mounted on a needle board 16, a determined number of barbed needles 18 of known type, and which can be driven in a vertical reciprocating movement by one or more connecting rod-crank assemblies 20 motorized by a single motor or not . A stripper 22 fixed to a frame 24 of the machine is mounted above the needling table to prevent the textile structure from being entrained when the needles are raised. Of course, the table as the stripper are respectively drilled with holes 26, 28 for the passage of needles. The table is movable vertically by means of a drive device 30 consisting for example of a motorized worm. Several series of drive rollers 32, 34 (also called input / output presses) arranged upstream and downstream of the machine provide horizontal transport of the textile structure towards the needling head.
Selon l'invention, il est prévu des moyens 36 de mesure de la position d'une surface supérieure de la structure textile disposés au niveau de la tête d'aiguilletage 14 et destinés à déterminer la pénétration réelle des aiguilles dans cette structure textile, à un point bas de pénétration maximale des aiguilles. En effet, la course des aiguilles étant constante par rapport au bâti auquel elles sont reliées et la table d'aiguilletage étant positionnée à une distance connue par rapport à ce bâti, il est aisé de montrer que la distance de pénétration des aiguilles dans la matière textile dépend directement de l'épaisseur de matériau existant entre la table d'aiguilletage et la surface supérieure mesurée.According to the invention, means 36 for measuring the position of an upper surface of the textile structure are provided, disposed at the level of the needling head 14 and intended to determine the actual penetration of the needles into this textile structure, a low point of maximum needle penetration. Indeed, the stroke of the needles being constant relative to the frame to which they are connected and the needling table being positioned at a known distance from this frame, it is easy to show that the distance of penetration of the needles into the material textile directly depends on the thickness of material existing between the needling table and the upper surface measured.
A cet effet, les moyens de mesure 36 sont fixés sur le bâti 24 et il est prévu que la planche à aiguilles 16 (et le debourreur 22) soit percée d'un orifice 38 (respectivement un orifice de passage 40) pour permettre une coopération de ces moyens de mesure avec la surface supérieure de la structure textile.To this end, the measuring means 36 are fixed on the frame 24 and it is provided that the needle board 16 (and the stripper 22) is pierced with an orifice 38 (respectively a passage orifice 40) to allow cooperation of these measuring means with the upper surface of the textile structure.
Selon le mode de réalisation envisagé, cette coopération peut s'effectuer sans contact (avec une mesure à distance de la position de la surface supérieure de la structure textile) ou avec contact (par la descente d'un palpeur mécanique sur la surface supérieure de la structure textile).Depending on the embodiment envisaged, this cooperation can be carried out without contact (with a remote measurement of the position of the upper surface of the textile structure) or with contact (by the descent of a mechanical probe on the upper surface of the textile structure).
La figure 1 illustre un mode de réalisation préférentiel de l'invention dans lequel ces moyens de mesure sans contact sont constitués par un ensemble optique de mesure tel qu'un émetteur/récepteur laser 42. L'émetteur dirige un faisceau laser, au travers de la planche à aiguilles, vers la surface supérieure de la structure textile (après avoir traversé le debourreur) qui le réfléchit alors vers le récepteur. La distance émetteur/table d'aiguilletage étant supposée connue par une mesure préalable, la détermination de la distance émetteur/surface supérieure de la structure textile, par l'analyse du trajet aller/retour du faisceau laser, suffit alors pour évaluer avec précision l'épaisseur de la structure textile supportée par la table d'aiguilletage. En outre, pour s'affranchir des défauts de reliefs de la structure textile, cet ensemble laser est de préférence du type à faisceau large (car ce modèle de laser en permettant des mesures sur toute la longueur du faisceau assure un effet d'intégration). Bien entendu, le recours à un ensemble optique de mesure à infrarouges est tout à fait envisageable sans toutefois être privilégié.FIG. 1 illustrates a preferred embodiment of the invention in which these non-contact measurement means consist of an optical measurement assembly such as a laser transmitter / receiver 42. The transmitter directs a laser beam, at through the needle board, towards the upper surface of the textile structure (after having crossed the stripper) which then reflects it towards the receiver. Since the distance from the transmitter to the needling table is assumed to be known by a prior measurement, the determination of the distance from the transmitter to the upper surface of the textile structure, by analyzing the return path of the laser beam, is then sufficient to accurately assess l thickness of the textile structure supported by the needling table. In addition, to overcome the relief of the textile structure, this laser assembly is preferably of the wide beam type (because this laser model by allowing measurements over the entire length of the beam ensures an integration effect) . Of course, the use of an infrared optical measurement assembly is entirely possible without however being preferred.
La figure 2 illustre un mode de réalisation alternatif dans lequel les moyens de mesure sont constitués par un palpeur mécanique formé d'un piston interne 44 fixé au bâti 24 et sur lequel peut coulisser un manchon externe 46 dont l'extrémité légèrement arrondie est destinée à venir en contact directement avec la structure textile (après avoir traversée la planche à aiguilles et le debourreur). Ce coulissement du manchon est assuré par l'injection commandée d'un fluide, de préférence de l'air comprimé, dans le piston depuis un module de commande 48 fixé sur le bâti 24. La pression du fluide est ajustée en fonction de la nature de la structure textile à aiguilleter (dureté, réaction au rebond) et réglée de façon à éviter tout rebond du manchon sur cette structure textile. Le manchon comporte par ailleurs à sa partie supérieure une collerette réfléchissante 50 destinée à coopérer avec un ensemble optique de mesure comme un émetteur/récepteur laser ou à infrarouges 52 fixé aussi sur le bâti. L'émetteur dirige son rayonnement vers la collerette du manchon qui le réfléchit alors vers le récepteur. La distance émetteur/récepteur, lorsque l'extrémité du palpeur est en contact de la table d'aiguilletage, étant supposée connue par une mesure préalable, la détermination de la distance émetteur/récepteur lorsque cette extrémité est en contact de la surface supérieure de la structure textile (par l'analyse du trajet aller/retour du faisceau rayonné) suffit là encore pour évaluer avec précision l'épaisseur de la structure textile supportée par la table d'aiguilletage. Dans les deux modes de réalisation précités, les moyens de mesure 36 sont disposés de préférence dans un plan médian de la tête d'aiguilletage 14 perpendiculaire à une direction d'avancée de la structure textile (il n'est bien sûr pas interdit de s'en écarter sensiblement). Ils peuvent être dédoublés, lorsque cette structure textile se présente sous la forme de deux plaques adjacentes avançant parallèlement l'une à l'autre sous la tête d'aiguilletage. Dans cette configuration illustrée à la figure 3, la tête d'aiguilletage peut comporter deux planches à aiguilles indépendantes disposées côte à côte, les moyens de mesure étant alors placés sensiblement au centre de chacune de ces planches. Pour en faciliter la compréhension, cette figure 3 montre la machine, dans le cadre du mode de réalisation alternatif précédent, dans deux positions distinctes, l'une (partie gauche de cette figure 3) correspondant à une position de repos, la tête d'aiguilletage étant en position relevée, et l'autre (partie droite) correspondant à une position de cette tête à un point bas de pénétration maximale des aiguilles.FIG. 2 illustrates an alternative embodiment in which the measuring means consist of a mechanical feeler formed by an internal piston 44 fixed to the frame 24 and on which an external sleeve 46 can slide, the slightly rounded end of which is intended to come into direct contact with the textile structure (after crossing the needle board and the stripper). This sliding of the sleeve is ensured by the controlled injection of a fluid, preferably compressed air, into the piston from a control module 48 fixed on the frame 24. The pressure of the fluid is adjusted according to the nature of the textile structure to be needled (hardness, rebound reaction) and adjusted so as to avoid any rebound of the sleeve on this textile structure. The sleeve also comprises at its upper part a reflective collar 50 intended to cooperate with an optical measurement assembly such as a laser or infrared transmitter / receiver 52 also fixed on the frame. The emitter directs its radiation towards the collar of the sleeve which then reflects it towards the receiver. The transmitter / receiver distance, when the end of the probe is in contact with the needling table, being assumed to be known by a prior measurement, the determination of the transmitter / receiver distance when this end is in contact with the upper surface of the textile structure (by analyzing the return path of the radiated beam) here again suffices to accurately assess the thickness of the textile structure supported by the needling table. In the two aforementioned embodiments, the measuring means 36 are preferably arranged in a median plane of the needling head 14 perpendicular to a direction of advance of the textile structure (it is of course not prohibited to s '' deviate significantly). They can be split, when this textile structure is in the form of two adjacent plates advancing parallel to one another under the needling head. In this configuration illustrated in FIG. 3, the needling head can comprise two boards with independent needles arranged side by side, the measurement means then being placed substantially in the center of each of these boards. To make it easier to understand, this figure 3 shows the machine, in the context of the previous alternative embodiment, in two distinct positions, one (left part of this figure 3) corresponding to a rest position, the head of needling being in the raised position, and the other (right part) corresponding to a position of this head at a low point of maximum needle penetration.
La détermination du point bas de pénétration maximale des aiguilles est effectuée en temps réel par un capteur 54, par exemple de type inductif ou optique, solidaire du bâti et coopérant par exemple avec un profil de came déterminé 56 de l'ensemble bielle-manivelle 20 de commande du mouvement alternatif vertical de la tête d'aiguilletage. Ce profil de came permet de définir une période de temps (et non seulement un instant de mesure unique et instantané) pendant la descente de la planche à aiguilles, de préférence au voisinage du point bas, pendant laquelle les moyens de mesure 36 seront actifs et pourront faire l'acquisition de plusieurs mesures à partir desquelles sera déterminée, au niveau d'un module de traitement 58 relié d'une part au capteur 54 et d'autre part aux moyens de mesure 36, une première valeur moyenne de l'épaisseur des couches aiguilletées. Ces mesures seront ensuite réitérées pour chaque pas d'avance horizontal de la structure textile, l'ensemble des valeurs obtenues à l'issue d'un passage donné permettant une détermination de la pénétration réelle moyenne des aiguilles à partir de laquelle le dispositif d'entraînement de la table d'aiguilletage 30 relié aux moyens de traitement 58 pourra commander de façon automatique le déplacement vertical de la table d'aiguilletage en vue du passage suivant, le pas de descente de cette table étant géré de façon que les aiguilles pénètrent d'une distance déterminée dans la structure textile.The determination of the low point of maximum penetration of the needles is carried out in real time by a sensor 54, for example of the inductive or optical type, integral with the frame and cooperating for example with a determined cam profile 56 of the rod-crank assembly 20 control of the vertical reciprocating movement of the needling head. This cam profile makes it possible to define a period of time (and not just a single instantaneous measurement instant) during the descent of the needle board, preferably in the vicinity of the low point, during which the measurement means 36 will be active and will be able to acquire several measurements from which will be determined, at the level of a processing module 58 connected on the one hand to the sensor 54 and on the other hand to the measurement means 36, a first average value of the thickness needled layers. These measurements will then be reiterated for each horizontal advance step of the textile structure, the set of values obtained at the end of a given passage allowing a determination of the real average penetration of the needles from which the device drive of the needling table 30 connected to the processing means 58 can automatically control the vertical movement of the needling table for the next passage, the step of descent of this table being managed so that the needles penetrate a determined distance into the textile structure.
Ainsi, le procédé d'aiguilletage mis en œuvre dans la machine de l'invention peut se résumer comme suit. Tout d'abord, superposer une seconde épaisseur de couche sur une première épaisseur de couche posée sur la table d'aiguilletage et lier par des aiguilles à barbes d'une tête d'aiguilletage, et selon des conditions prédéterminées, les épaisseurs des deux couches ainsi superposées, puis déplacer relativement la table d'aiguilletage par rapport à la tête d'aiguilletage d'un pas de déplacement déterminé fonction de la position d'une surface supérieure des deux couches superposées mesurée à un point bas de pénétration maximale des aiguilles par des moyens de mesure appropriée, et enfin superposer une troisième épaisseur de couche sur les deux précédentes et lier cette troisième épaisseur de couche sur les deux précédentes selon les mêmes conditions prédéterminées. Ces étapes seront ensuite répétées pour les couches suivantes jusqu'à obtenir l'épaisseur désirée pour la structure textile.Thus, the needling process implemented in the machine of the invention can be summarized as follows. First of all, superimpose a second layer thickness on a first layer thickness laid on the needling table and bind with barbed needles of a needling head, and according to predetermined conditions, the thicknesses of the two layers thus superimposed, then relatively move the needling table with respect to the needling head by a displacement pitch determined as a function of the position of an upper surface of the two superimposed layers measured at a low point of maximum penetration of the needles by appropriate measurement means, and finally superimpose a third layer thickness on the previous two and link this third layer thickness on the previous two according to the same predetermined conditions. These steps will then be repeated for the following layers until the desired thickness for the textile structure is obtained.
Le procédé mis en œuvre dans les machines décrites ci-dessus consiste à poser sur la table 10 tout d'abord une voire deux couches superposées qui sont alors liées par aiguilletage au moyen de la planche à aiguilles 16 tout en étant déplacées horizontalement sur toute la longueur de la structure textile par des rouleaux d'avance 32, 34. La table est ensuite descendue d'un pas de déplacement déterminé pour pouvoir superposer une troisième couche qui est à son tour aiguilletée avec les deux autres et ainsi de suite jusqu'à obtenir l'épaisseur désirée.The method implemented in the machines described above consists in placing on the table 10 first of all one or even two superposed layers which are then linked by needling by means of the needle board 16 while being moved horizontally over the whole length of the textile structure by feed rollers 32, 34. The table is then lowered by a determined displacement pitch in order to be able to superimpose a third layer which is in turn needled with the other two and so on until obtain the desired thickness.
Conformément à l'invention, ce pas de déplacement déterminé est non pas fixe ou soumis à une loi de descente prédéfinie, mais il résulte de la pénétration réelle des aiguilles dans les couches précédentes de la structure textile mesurée au point bas de pénétration maximale des aiguilles afin d'obtenir la densité d'aiguilletage réelle souhaitée pour cette structure textile, densité constante ou évolutive dans l'épaisseur de la structure textile. Ainsi, on mesure au centre des aiguilles la position de la surface supérieure de cette structure textile pour gérer le pas de descente de la table d'aiguilletage, de façon que ces aiguilles pénètrent dans la structure textile d'une distance déterminée. According to the invention, this determined displacement step is not fixed or subject to a predefined law of descent, but it results from the actual penetration of the needles into the preceding layers of the textile structure measured at the low point of maximum penetration of the needles in order to obtain the actual needling density desired for this textile structure, constant or changing density in the thickness of the textile structure. Thus, the position of the upper surface of this textile structure is measured at the center of the needles to manage the pitch of descent of the needling table, so that these needles penetrate the textile structure from a determined distance.

Claims

REVENDICATIONS
1. Machine d'aiguilletage d'une structure textile formée d'une pluralité de couches superposées (12) comportant une table d'aiguilletage (10) mobile verticalement, une tête d'aiguilletage (14) comportant un nombre déterminé d'aiguilles à barbes (18) et disposée à l'aplomb de ladite table d'aiguilletage, et des moyens d'entraînement de ladite tête d'aiguilletage pour lui conférer un mouvement alternatif vertical définissant un point bas de pénétration maximale des aiguilles dans ladite structure textile, caractérisée en ce qu'elle comporte en outre des moyens de mesure (36), disposés au niveau de ladite tête d'aiguilletage, pour mesurer la position d'une surface supérieure de ladite structure textile audit point bas de pénétration maximale des aiguilles.1. A needling machine for a textile structure formed of a plurality of superimposed layers (12) comprising a needling table (10) movable vertically, a needling head (14) comprising a determined number of needles to barbs (18) and arranged directly above said needling table, and means for driving said needling head to give it a vertical reciprocating movement defining a low point of maximum penetration of the needles into said textile structure, characterized in that it further comprises measuring means (36), disposed at said needling head, for measuring the position of an upper surface of said textile structure at said low point of maximum penetration of the needles.
2. Machine selon la revendication 1 , caractérisée en ce que lesdits moyens de mesure sont disposés dans un plan médian de ladite tête d'aiguilletage perpendiculaire à une direction d'avance de ladite structure textile.2. Machine according to claim 1, characterized in that said measuring means are arranged in a median plane of said needling head perpendicular to a direction of advance of said textile structure.
3. Machine selon la revendication 1 ou la revendication 2, caractérisée en ce que lesdits moyens de mesure de la position de la surface supérieure de ladite structure textile comportent un ensemble optique (42) de mesure sans contact.3. Machine according to claim 1 or claim 2, characterized in that said means for measuring the position of the upper surface of said textile structure comprise an optical assembly (42) for non-contact measurement.
4. Machine selon la revendication 1 ou la revendication 2, caractérisée en ce que ledit ensemble optique comporte un émetteur/récepteur laser. 4. Machine according to claim 1 or claim 2, characterized in that said optical assembly comprises a laser transmitter / receiver.
5. Machine selon la revendication 4, caractérisée en ce que ledit émetteur/récepteur laser est du type à faisceau large.5. Machine according to claim 4, characterized in that said laser transmitter / receiver is of the wide beam type.
6. Machine selon la revendication 1 ou la revendication 2, caractérisée en ce que lesdits moyens de mesure de la position de la surface supérieure de ladite structure textile comportent un palpeur mécanique (44-52) de mesure par contact.6. Machine according to claim 1 or claim 2, characterized in that said means for measuring the position of the upper surface of said textile structure comprise a mechanical feeler (44-52) for contact measurement.
7. Machine selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'elle comporte en outre un capteur (54), de préférence de type inductif ou optique, pour déterminer ledit point bas de pénétration maximale des aiguilles. 7. Machine according to any one of claims 1 to 6, characterized in that it further comprises a sensor (54), preferably of the inductive or optical type, for determining said low point of maximum penetration of the needles.
8. Machine selon la revendication 7, caractérisée en ce qu'elle comporte en outre des moyens de traitement (58) pour commander le déplacement vertical de ladite table d'aiguilletage en fonction de la mesure de la position de la surface supérieure de la structure textile effectuée audit point bas de pénétration maximale des aiguilles par lesdits moyens de mesure. 8. Machine according to claim 7, characterized in that it further comprises processing means (58) for controlling the vertical displacement of said needling table as a function of the measurement of the position of the upper surface of the textile structure carried out at said low point of maximum penetration of the needles by said measuring means.
9. Procédé de réalisation d'une structure textile formée d'une pluralité de couches superposées (12), comportant les étapes suivantes : a) superposer une seconde épaisseur de couche sur une première épaisseur de couche posée sur une table d'aiguilletage (10), b) lier par des aiguilles à barbes (16) d'une tête d'aiguilletage9. Method for producing a textile structure formed from a plurality of superimposed layers (12), comprising the following steps: a) superimposing a second layer thickness on a first layer thickness placed on a needling table (10 ), b) bind by needles with barbs (16) of a needling head
(14), et selon des conditions prédéterminées, les épaisseurs des deux couches ainsi superposées, c) déplacer relativement ladite table d'aiguilletage par rapport à ladite tête d'aiguilletage d'un pas de déplacement déterminé fonction de la position d'une surface supérieure des deux couches superposées mesurée, au niveau de la tête d'aiguilletage, à un point bas de pénétration maximale des aiguilles, d) superposer une nouvelle épaisseur de couche sur les précédentes, e) lier ladite nouvelle épaisseur de couche sur les précédentes selon lesdites conditions prédéterminées, et f) réitérer les étapes c), d) et e) pour des épaisseurs de couche suivantes, le déplacement de l'étape c) étant déterminé en fonction de la position de la surface supérieure de la structure textile en cours de réalisation, mesurée au niveau de la tête d'aiguilletage, à un point bas de pénétration maximale des aiguilles.(14), and according to predetermined conditions, the thicknesses of the two layers thus superimposed, c) relatively moving said needling table with respect to said needling head by a displacement pitch determined as a function of the position of a surface upper of the two superimposed layers measured, at the level of the needling head, at a low point of maximum penetration of the needles, d) superimpose a new layer thickness on the previous ones, e) link said new layer thickness on the previous ones according to said predetermined conditions, and f) repeating steps c), d) and e) for subsequent layer thicknesses, the displacement of step c) being determined as a function of the position of the upper surface of the textile structure in progress embodiment, measured at the needling head, at a low point of maximum needle penetration.
10. Procédé selon la revendication 9, caractérisé en ce que ladite mesure de la position de la surface supérieure de la structure textile est effectuée en moyennant des mesures instantanées relevées en temps réel sur toute la longueur de la structure textile. 10. Method according to claim 9, characterized in that said measurement of the position of the upper surface of the textile structure is carried out by means of instantaneous measurements taken in real time over the entire length of the textile structure.
EP02706913A 2001-03-02 2002-03-01 Needle-punching machine equipped with a penetration measuring device Expired - Lifetime EP1373623B1 (en)

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FR0102869A FR2821632B1 (en) 2001-03-02 2001-03-02 NEEDLE MACHINE HAVING A PENETRATION MEASURING DEVICE
FR0102869 2001-03-02
PCT/FR2002/000745 WO2002070807A1 (en) 2001-03-02 2002-03-01 Needle-punching machine equipped with a penetration measuring device

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FR2821632A1 (en) 2002-09-06
FR2821632B1 (en) 2003-08-08
HUP0303368A3 (en) 2008-08-28
RU2279499C2 (en) 2006-07-10
CN1494617A (en) 2004-05-05
DE60204554T2 (en) 2006-03-16
WO2002070807A1 (en) 2002-09-12
CA2439701C (en) 2008-08-26
CN1320191C (en) 2007-06-06
ES2242846T3 (en) 2005-11-16
KR100835773B1 (en) 2008-06-09
KR20040025664A (en) 2004-03-24
IL157423A0 (en) 2004-03-28
WO2002070807A8 (en) 2004-05-06
MXPA03007824A (en) 2004-11-12
EP1373623B1 (en) 2005-06-08
CA2439701A1 (en) 2002-09-12
HUP0303368A2 (en) 2004-01-28
JP4290990B2 (en) 2009-07-08
RU2003127060A (en) 2005-02-27
DE60204554D1 (en) 2005-07-14
UA74423C2 (en) 2005-12-15
ATE297482T1 (en) 2005-06-15
JP2004526878A (en) 2004-09-02
BR0207550A (en) 2004-09-14

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