EP1331293A1 - Method of fabricating a heddle frame slat for the heddle frame of a weaving machine and a heddle frame slat obtained by such method - Google Patents
Method of fabricating a heddle frame slat for the heddle frame of a weaving machine and a heddle frame slat obtained by such method Download PDFInfo
- Publication number
- EP1331293A1 EP1331293A1 EP03360003A EP03360003A EP1331293A1 EP 1331293 A1 EP1331293 A1 EP 1331293A1 EP 03360003 A EP03360003 A EP 03360003A EP 03360003 A EP03360003 A EP 03360003A EP 1331293 A1 EP1331293 A1 EP 1331293A1
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- EP
- European Patent Office
- Prior art keywords
- support profile
- heald
- template
- heald rod
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C9/00—Healds; Heald frames
- D03C9/06—Heald frames
- D03C9/0608—Construction of frame parts
- D03C9/0616—Horizontal upper or lower rods
- D03C9/0633—Heald bars or their connection to other frame parts
Definitions
- the present invention relates to a method of manufacturing a cross member for a frame of a weaving machine heald as well as a crosspiece obtained by said process, this cross member comprising at least one support profile and an integral heald rod said profile along a junction zone.
- the heald frames are well known in the textile industry and mainly used in weaving machines.
- Each heald frame constitutes a rectangular structure arranged to carry weaving healds.
- this rectangular structure conventionally comprises an upper cross member formed a support profile secured to an upper heald rod, a cross member lower formed of a support profile secured to a lower rod and two lateral uprights assembled at the ends of the crosspieces to form said frame.
- the main function of support profiles is to provide rigidity which is missing from the heald rods and in a known manner comprise a section higher than that of the rods.
- the heald rods must be linear and parallel between them with an accuracy of about + or - 0.3 mm.
- each stringer weaving consists of a metal strip provided at its ends with a loop for mounting on the heald rods with a set of operation, and in the center of an eyelet to carry and guide a chain wire.
- weaving heddles are distributed, for example one in two, on two heald frames.
- the heddle frames are set in alternating vertical movement by a adapted drive mechanism. For example for a speed of 1200 shots per minute, each heald frame is animated at a speed of 600 periods per minute.
- the constant increase in weaving speeds has revealed behaviors mechanical problems and new technical problems both in terms of smooth as smooth weaving.
- the support profiles are mainly made of alloy aluminum and heald rods are usually made of steel stainless steel and attached to the support profiles by means of rivets in order to obtain a rigid assembly.
- the use of aluminum alloy support profiles obtained by extrusion or spinning is an interesting solution because it allows produce at low cost support profiles of reduced weight having a very good straightness.
- any defect in straightness can be easily corrected by a mechanical dressing operation which is possible thanks to the characteristics specific mechanics of metal alloys.
- This straightness then allows use the aluminum support profile as a reference base for fixing by riveting the heald rod making it straight. Indeed, this rail rod is not necessarily linear in the free state due to its low rigidity.
- the present invention aims to overcome these drawbacks by proposing a method of manufacturing a cross member for a weaving machine heald frame as well as a cross member obtained by this process, making it possible to produce at low cost and without waste cross member combining characteristics of lightness and great rigidity, and whose boom rail is placed on the support profile in a precise position perfectly linear, this position being controlled and reproducible.
- the invention relates to a manufacturing process of the kind indicated in preamble, characterized in that a rigid template is used comprising at least a first rectilinear groove having a width substantially equal to that of the heald rod, place the heald rod in said groove to make it straight, we put a bead of glue in the junction area, we position predetermined and unconstrained manner said support profile on said template and on the heald rod by crushing said bead of glue and the assembly is maintained support profile and rod holder integral with said template at least during the setting time of said glue.
- a rigid template comprising at least a first rectilinear groove having a width substantially equal to that of the heald rod, place the heald rod in said groove to make it straight, we put a bead of glue in the junction area, we position predetermined and unconstrained manner said support profile on said template and on the heald rod by crushing said bead of glue and the assembly is maintained support profile and rod holder integral with said template at least during the setting time of said glue.
- the template and the support profile include complementary forms of fitting arranged to precisely position the support profile with respect to the heald rod.
- the template has a second groove, at least the ends of which are straight and parallel to the first groove, this second groove being arranged to receive said substantially rectangular section of the support profile.
- the support profile can be non-rectilinear and the second groove of the template can have a width greater than the total width of the rectangular section of the support profile.
- positioning members can be used arranged to be mounted at the ends of the support profile, these positioning having a width substantially equal to that of the ends of the second groove.
- a number n of templates each template being superimposed on the previous one after having set up the rail, the adhesive bead and the corresponding support profile, and maintains the set n support profiles and n rods integral with the n overlapping templates at least during the setting time of the glue.
- the invention also relates to a cross member of the kind indicated in preamble, characterized in that the support profile is rigid, in that the rod heald carrier is non-rigid and in that the heald rod is securely attached said support profile by gluing in a rectilinear position obtained by means a template arranged to hold said heald rod relative to said profile of support in this rectilinear position at least during the setting time of said glue.
- the support profile can be a non-straight profile, made of materials composites and obtained by a process chosen from the group comprising at least extrusion, pultrusion.
- This support profile may have a substantially rectangular section extended by a straight section intended to receive the heald rod. He can too have a substantially rectangular section in which is formed a longitudinal groove intended to receive the heald rod.
- This rail rod may be metallic and have a section chosen from the group comprising at minus a T shape, a J shape
- the invention relates to a method of manufacturing a cross member 2, 2 'for heald frame 1 of the weaving machine and a cross member 2, 2' obtained by this process.
- FIG. 1 An example of a traditional heald frame 1 for a weaving machine is shown in the Figure 1. It comprises, in known manner, two cross members 2 substantially parallel laterally assembled by two 2 "uprights. Each cross member 2 is formed of a support profile 3 and a heald rod 4.
- the heald rods 4 have for function of carrying and guiding a set of weaving heddles 5, only two of which are represented by their ends 50 in the form of a loop, respecting a set of operation J.
- each weaving smooth 5 carries an eyelet 51 for the passage of a warp thread 6.
- These weaving healds 5 are generally produced in a hardened metallic material, for example stainless steel, to resist mechanical stresses.
- the heald rods 4 In order to guarantee this operating clearance J on all the length of the heald frame 1, the heald rods 4 must be perfectly linear and parallel to each other, respecting an accuracy of approximately + or - 0.3 mm.
- the support profile 3 has a section substantially rectangular 30 extended by a cross section 31 adapted to receive on the heald rod 4 along a junction zone 40 formed by a flat surface.
- This rod holder 4 can have a section in coated T 4a or in J 4b according to the shape of the loops 50 of the weaving heddles 5.
- FIGS. 5A and 5B illustrate an alternative embodiment of a cross member 2 ′, in which the support profile 3 'has a substantially rectangular section 30 in which is formed a longitudinal groove 33 adapted to receive the rod heald carrier 4 'along a junction zone 40' formed by at least two surfaces parallel planes.
- the longitudinal groove 33 can be oriented parallel to the plane of the support profile 3 ', in accordance with the example illustrated, or perpendicularly according to the shape of the rod 4 '.
- This 4 'heald rod can have a coated T section extended by a junction leg 4'a, in J turned 4'b or in Inverted T 4'c according to the shape of the loops 50 of the weaving healds 5.
- the substantially rectangular section 30 of the support profile 3, 3 ' has a central recess 32 which has the advantage of reducing its mass and its cost material.
- the template 7 and the support profile 3, 3 ' have complementary shapes socket allowing precise positioning of the support profile 3, 3 'by compared to the pole rail 4, 4 '.
- the template 7 comprises a second groove 71 of which at least the ends are straight and parallel to the first groove 70.
- This second groove 71 has a width greater than the total width of the substantially rectangular section 30 of the profile support 3, 3 '.
- the shapes complementary nesting are formed by the positioning members 9 and the ends of the second groove 71. It is of course possible to provide other equivalent forms.
- These positioning members 9 are constituted with reference to FIG. 3C of a plate 90 in the shape of a T, the leg of the T forming a male part capable of fitting together in the central recess 32 of the support profile 3, 3 'and the T bar having a width equal to that of the ends of the groove 71 of the template 7.
- the method of manufacturing then includes a step in which the positioning 9 in the ends of the support profile 3, 3 '(see fig. 3C) before place said support section 3, 3 'in the template 7.
- the templates 7 have a rear part wider than their front part forming respectively a female interlocking zone 72 and a male interlocking zone 73.
- the rear part has two longitudinal edges 74 delimiting the zone female socket 72, the interval between these two longitudinal edges 74 corresponding to the width of the male nesting zone 73.
- This manufacturing process therefore makes it possible to produce a cross member 2, 2 ′ in which the heald rod 4, 4 'is fixedly attached to the support profile 3, 3' by gluing in a rectilinear position obtained by means of the template 7 arranged to maintain this rod holder 4, 4 'relative to the support profile 3.3' in this position at least during the setting time of the glue.
- This manufacturing process is particularly advantageous when using a profile support 3, 3 'which is made of a rigid material but which does not necessarily have a rectilinear geometry as well as a 4, 4 'heald rod which does not necessarily have a rectilinear geometry in the free state but which is made of a non-rigid material authorizing a straightening.
- This difference in rigidity is obtained by the choice of materials but also by the differences in section, the section of the rod 4, 4 'being significantly lower than that of the support profile 3, 3'.
- this rod heald holder 4, 4 ' which constitutes the functional part of the cross member 2, 2', is fixed in a rectilinear position imposed by the template 7.
- the support profile 3, 3 is then assembled to this heald rod 4, 4 'without undergoing any significant deformation in the plan of said profile.
- the heald rod 4, 4 ′ remains in its rectilinear position taking into account the large difference in rigidity between the support profile 3, 3 'and the heald rod 4, 4 '. In fact, if the heald rod 4, 4 'tends to return to its original shape, the profile support 3, 3 'being much more rigid, opposes any deformation and freezes the heald rod 4, 4 'in the position imposed by the template 7.
- This manufacturing process is therefore particularly suitable for support profiles 3, 3 'made of composite materials and obtained according to a continuous process such as extrusion or pultrusion.
- These composite materials are for example resins thermosets made from carbon, glass or other fibers. They have the advantage of giving the support profile 3, 3 'a very high rigidity increasing its mechanical resistance to fatigue while considerably reducing its weight.
- the lack of straightness linked to the use of these composite materials is no longer a disadvantage thanks to the combination of the template 7 and the positioning members 9 or any other equivalent means.
- this manufacturing process can also be advantageous for support profiles 3, 3 'made so traditional aluminum alloy to eliminate the prior stage of straightening. In this case, the bonding can be replaced by riveting or any equivalent means.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Moulding By Coating Moulds (AREA)
- Springs (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Golf Clubs (AREA)
Abstract
Description
La présente invention concerne un procédé de fabrication d'une traverse pour cadre de lisse de machine à tisser ainsi qu'une traverse obtenue par ledit procédé, cette traverse comportant au moins un profilé de support et une tringle porte-lisse solidaire dudit profilé le long d'une zone de jonction.The present invention relates to a method of manufacturing a cross member for a frame of a weaving machine heald as well as a crosspiece obtained by said process, this cross member comprising at least one support profile and an integral heald rod said profile along a junction zone.
Les cadres de lisse sont bien connus dans le domaine de l'industrie textile et principalement utilisés dans les machines à tisser. Chaque cadre de lisse constitue une structure rectangulaire agencée pour porter des lisses de tissage. A cet effet, cette structure rectangulaire comporte de manière classique une traverse supérieure formée d'un profilé de support solidaire d'une tringle porte-lisse supérieure, d'une traverse inférieure formée d'un profilé de support solidaire d'une tringle porte-lisse inférieure et de deux montants latéraux assemblés aux extrémités des traverses pour former ledit cadre. Les profilés de support ont pour principale fonction d'apporter la rigidité qui manque aux tringles porte-lisse et comportent de manière connue une section supérieure à celle des tringles porte-lisse. Par ailleurs, pour garantir le bon fonctionnement des lisses de tissage et leur coulissement sur toute la longueur du cadre, les tringles porte-lisse doivent impérativement être linéaires et parallèles entre elles avec une précision d'environ + ou - 0,3 mm. Rappelons que chaque lisse de tissage est constituée d'une lamelle métallique pourvue en ses extrémités d'une boucle pour se monter sur les tringles porte-lisse moyennant un jeu de fonctionnement, et en son centre d'un oeillet pour porter et guider un fil de chaíne. Il y a donc autant de lisses de tissage que de fils de chaíne, ces lisses de tissage étant réparties, par exemple une sur deux, sur deux cadres de lisse. Sur la machine de tissage, les cadres de lisse sont mis en mouvement vertical alternatif par un mécanisme d'entraínement adapté. Par exemple pour une vitesse de 1200 coups par minute, chaque cadre de lisse est animé à une vitesse de 600 périodes par minute. L'augmentation constante des vitesses de tissage a fait apparaítre des comportements mécaniques et des problèmes techniques nouveaux aussi bien au niveau des cadres de lisse que des lisses de tissage.The heald frames are well known in the textile industry and mainly used in weaving machines. Each heald frame constitutes a rectangular structure arranged to carry weaving healds. To this end, this rectangular structure conventionally comprises an upper cross member formed a support profile secured to an upper heald rod, a cross member lower formed of a support profile secured to a lower rod and two lateral uprights assembled at the ends of the crosspieces to form said frame. The main function of support profiles is to provide rigidity which is missing from the heald rods and in a known manner comprise a section higher than that of the rods. Besides, to guarantee the good operation of the weaving heddles and their sliding over the entire length of the frame, the heald rods must be linear and parallel between them with an accuracy of about + or - 0.3 mm. Remember that each stringer weaving consists of a metal strip provided at its ends with a loop for mounting on the heald rods with a set of operation, and in the center of an eyelet to carry and guide a chain wire. There is therefore has as many weaving heddles as there are warp threads, these weaving heddles being distributed, for example one in two, on two heald frames. On the machine weaving, the heddle frames are set in alternating vertical movement by a adapted drive mechanism. For example for a speed of 1200 shots per minute, each heald frame is animated at a speed of 600 periods per minute. The constant increase in weaving speeds has revealed behaviors mechanical problems and new technical problems both in terms of smooth as smooth weaving.
A ce jour, les profilés de support sont essentiellement fabriqués en alliage d'aluminium et les tringles porte-lisse sont habituellement fabriquées en acier inoxydable et rapportées sur les profilés de support au moyen de rivets afin d'obtenir un assemblage rigide. L'utilisation de profilés de support en alliage d'aluminium obtenus par extrusion ou filage est une solution intéressante car elle permet de réaliser à des coûts raisonnables des profilés de support d'un poids réduit ayant une très bonne rectitude. De plus, l'éventuel défaut de rectitude peut être aisément corrigé par une opération de dressage mécanique qui est possible grâce aux caractéristiques mécaniques spécifiques des alliages métalliques. Cette rectitude permet alors d'utiliser le profilé de support en aluminium comme base de référence pour y fixer par rivetage la tringle porte-lisse en la rendant rectiligne. En effet, cette tringle porte-lisse n'est pas forcément linéaire à l'état libre du fait de sa faible rigidité.To date, the support profiles are mainly made of alloy aluminum and heald rods are usually made of steel stainless steel and attached to the support profiles by means of rivets in order to obtain a rigid assembly. The use of aluminum alloy support profiles obtained by extrusion or spinning is an interesting solution because it allows produce at low cost support profiles of reduced weight having a very good straightness. In addition, any defect in straightness can be easily corrected by a mechanical dressing operation which is possible thanks to the characteristics specific mechanics of metal alloys. This straightness then allows use the aluminum support profile as a reference base for fixing by riveting the heald rod making it straight. Indeed, this rail rod is not necessarily linear in the free state due to its low rigidity.
Néanmoins, ce type de cadre de lisse largement répandu présente des performances modestes en terme de rigidité et une mauvaise tenue à la fatigue mécanique. Ces inconvénients se sont amplifiés avec l'augmentation des vitesses de tissage. De plus, l'assemblage par rivets des tringles porte-lisse sur les profilés de support génère des concentrations de contraintes néfastes pouvant occasionner des ruptures prématurées des cadres de lisse face aux fortes sollicitations dynamiques alternatives.However, this type of widely used heald frame has performance modest in terms of rigidity and poor resistance to mechanical fatigue. These disadvantages have increased with the increase in weaving speeds. Moreover, the assembly by rail of the heald rods on the support profiles generates concentrations of harmful stresses that can cause premature ruptures heddle frames in the face of strong alternative dynamic stresses.
On a cherché à résoudre ce problème en incorporant dans les profilés de support des raidisseurs en fibres de carbone et en assemblant la tringle porte-lisse par emboítement dans une rainure prévue sur chaque profilé de support, comme décrit dans la publication US-A-4,913,194. Néanmoins, ce type de réalisation est complexe et très coûteux compte tenu du nombre et de la diversité des pièces à assembler.We tried to solve this problem by incorporating into the support profiles carbon fiber stiffeners and by assembling the rail fitting into a groove provided on each support profile, as described in publication US-A-4,913,194. However, this type of achievement is complex and very expensive considering the number and diversity of the parts to be assembled.
Une autre solution consiste à réaliser les profilés de support entièrement en matériaux composites, par exemple par pultrusion de résines thermodures incorporant des fibres de carbone ou des fibres de verre, et à rapporter par collage les tringles porte-lisse. Les matériaux composites présentent de nombreux avantages :
- en terme de légèreté, réduisant considérablement la masse et l'inertie du cadre et améliorant ainsi son comportement dynamique, et
- en terme de rigidité en traction et en compression, augmentant sa tenue à la fatigue mécanique bien au-delà de celle des alliages d'aluminium.
- in terms of lightness, considerably reducing the mass and inertia of the frame and thus improving its dynamic behavior, and
- in terms of tensile and compressive stiffness, increasing its resistance to mechanical fatigue far beyond that of aluminum alloys.
La présente invention vise à pallier ces inconvénients en proposant un procédé de fabrication d'une traverse pour cadre de lisse de machine à tisser ainsi qu'une traverse obtenue par ce procédé, permettant de réaliser à moindre coût et sans rebus une traverse combinant des caractéristiques de légèreté et de grande rigidité, et dont la tringle porte-lisse est placée sur le profilé de support dans une position précise parfaitement linéaire, cette position étant contrôlée et reproductible. The present invention aims to overcome these drawbacks by proposing a method of manufacturing a cross member for a weaving machine heald frame as well as a cross member obtained by this process, making it possible to produce at low cost and without waste cross member combining characteristics of lightness and great rigidity, and whose boom rail is placed on the support profile in a precise position perfectly linear, this position being controlled and reproducible.
Dans ce but, l'invention concerne un procédé de fabrication du genre indiqué en préambule, caractérisé en ce que l'on utilise un gabarit rigide comportant au moins une première rainure rectiligne présentant une largeur sensiblement égale à celle de la tringle porte-lisse, on place la tringle porte-lisse dans ladite rainure pour la rendre rectiligne, on dépose un cordon de colle dans la zone de jonction, on positionne de manière prédéterminée et sans contrainte ledit profilé de support sur ledit gabarit et sur la tringle porte-lisse en écrasant ledit cordon de colle et on maintient l'ensemble profilé de support et tringle porte-lisse solidaire dudit gabarit au moins pendant le temps de prise de ladite colle.To this end, the invention relates to a manufacturing process of the kind indicated in preamble, characterized in that a rigid template is used comprising at least a first rectilinear groove having a width substantially equal to that of the heald rod, place the heald rod in said groove to make it straight, we put a bead of glue in the junction area, we position predetermined and unconstrained manner said support profile on said template and on the heald rod by crushing said bead of glue and the assembly is maintained support profile and rod holder integral with said template at least during the setting time of said glue.
D'une manière préférentielle, le gabarit et le profilé de support comportent des formes complémentaires d'emboítement agencées pour positionner avec précision le profilé de support par rapport à la tringle porte-lisse.Preferably, the template and the support profile include complementary forms of fitting arranged to precisely position the support profile with respect to the heald rod.
Dans le cas où le profilé de support présente une section sensiblement rectangulaire, le gabarit comporte une seconde rainure dont au moins les extrémités sont rectilignes et parallèles à la première rainure, cette seconde rainure étant agencée pour recevoir ladite section sensiblement rectangulaire du profilé de support.In the case where the support profile has a substantially rectangular section, the template has a second groove, at least the ends of which are straight and parallel to the first groove, this second groove being arranged to receive said substantially rectangular section of the support profile.
Le profilé de support peut être non rectiligne et la seconde rainure du gabarit peut présenter une largeur supérieure à la largeur totale de la section rectangulaire du profilé de support. Dans ce cas, on peut utiliser des organes de positionnement agencés pour être montés aux extrémités du profilé de support, ces organes de positionnement présentant une largeur sensiblement égale à celle des extrémités de la seconde rainure.The support profile can be non-rectilinear and the second groove of the template can have a width greater than the total width of the rectangular section of the support profile. In this case, positioning members can be used arranged to be mounted at the ends of the support profile, these positioning having a width substantially equal to that of the ends of the second groove.
Pour fabriquer un nombre n de traverses, on utilise avantageusement un nombre n de gabarits, chaque gabarit étant superposé sur le précédent après avoir mis en place la tringle porte-lisse, le cordon de colle et le profilé de support correspondants, et on maintient l'ensemble n profilés de support et n tringles porte-lisse solidaires des n gabarits superposés au moins pendant le temps de prise de la colle.To make a number n of sleepers, a number n of templates, each template being superimposed on the previous one after having set up the rail, the adhesive bead and the corresponding support profile, and maintains the set n support profiles and n rods integral with the n overlapping templates at least during the setting time of the glue.
Dans ce but, l'invention concerne également une traverse du genre indiqué en préambule, caractérisée en ce que le profilé de support est rigide, en ce que la tringle porte-lisse est non rigide et en ce que la tringle porte-lisse est fixée solidairement audit profilé de support par collage dans une position rectiligne obtenue au moyen d'un gabarit agencé pour maintenir ladite tringle porte-lisse par rapport audit profilé de support dans cette position rectiligne au moins pendant le temps de prise de ladite colle.For this purpose, the invention also relates to a cross member of the kind indicated in preamble, characterized in that the support profile is rigid, in that the rod heald carrier is non-rigid and in that the heald rod is securely attached said support profile by gluing in a rectilinear position obtained by means a template arranged to hold said heald rod relative to said profile of support in this rectilinear position at least during the setting time of said glue.
Le profilé de support peut être un profilé non rectiligne, réalisé en matériaux composites et obtenu par un procédé choisi dans le groupe comprenant au moins l'extrusion, la pultrusion.The support profile can be a non-straight profile, made of materials composites and obtained by a process chosen from the group comprising at least extrusion, pultrusion.
Ce profilé de support peut présenter une section sensiblement rectangulaire prolongée par une section droite destinée à recevoir la tringle porte-lisse. Il peut aussi présenter une section sensiblement rectangulaire dans laquelle est ménagée une rainure longitudinale destinée à recevoir la tringle porte-lisse. Cette tringle porte-lisse peut être métallique et présenter une section choisie dans le groupe comportant au moins une forme en T, une forme en J.This support profile may have a substantially rectangular section extended by a straight section intended to receive the heald rod. He can too have a substantially rectangular section in which is formed a longitudinal groove intended to receive the heald rod. This rail rod may be metallic and have a section chosen from the group comprising at minus a T shape, a J shape
La présente invention et ses avantages apparaítront mieux dans la description suivante d'un exemple de réalisation, en référence aux dessins annexés, dans lesquels:
- la figure 1 est une vue en perspective d'un cadre de lisse traditionnel pour machine à tisser,
- les figures 2A et 2B sont des vues de côté d'une traverse selon l'invention respectivement avant et après assemblage,
- les figures 3A à D sont des vues partielles en perspective de quatre étapes du procédé de fabrication selon l'invention pour réaliser une traverse,
- la figure 4 est une vue partielle en perspective d'une étape du procédé de fabrication selon l'invention pour réaliser un nombre n de traverses, et
- les figures 5A et 5B sont des vues de côté d'une variante de réalisation d'une traverse selon l'invention respectivement avant et après assemblage.
- FIG. 1 is a perspective view of a traditional heald frame for a weaving machine,
- FIGS. 2A and 2B are side views of a crosspiece according to the invention respectively before and after assembly,
- FIGS. 3A to D are partial perspective views of four stages of the manufacturing method according to the invention for producing a cross member,
- FIG. 4 is a partial perspective view of a step in the manufacturing method according to the invention for producing a number n of sleepers, and
- Figures 5A and 5B are side views of an alternative embodiment of a cross member according to the invention respectively before and after assembly.
En référence aux figures, l'invention concerne un procédé de fabrication d'une
traverse 2, 2' pour cadre de lisse 1 de machine à tisser et une traverse 2, 2' obtenue
par ce procédé.With reference to the figures, the invention relates to a method of manufacturing a
Un exemple de cadre de lisse 1 traditionnel pour machine à tisser est représenté à la
figure 1. Il comporte, de manière connue, deux traverses 2 sensiblement parallèles
assemblées latéralement par deux montants 2". Chaque traverse 2 est formée d'un
profilé de support 3 et d'une tringle porte-lisse 4. Les tringles porte-lisse 4 ont pour
fonction de porter et de guider un ensemble de lisses de tissage 5, dont deux seules
sont représentées, par leurs extrémités 50 en forme de boucle, en respectant un jeu de
fonctionnement J. Au centre, chaque lisse de tissage 5 porte un oeillet 51 pour le
passage d'un fil de chaíne 6. Ces lisses de tissage 5 sont généralement réalisées dans
une matière métallique trempée, par exemple en acier inoxydable, pour résister aux
contraintes mécaniques. Dans le but de garantir ce jeu de fonctionnement J sur toute
la longueur de cadre de lisse 1, les tringles porte-lisse 4 doivent être parfaitement
linéaires et parallèles entre-elles en respectant une précision d'environ + ou - 0,3 mm. An example of a
En référence aux figures 2A et 2B, le profilé de support 3 comporte une section
sensiblement rectangulaire 30 prolongée par une section droite 31 apte à recevoir sur
la tringle porte-lisse 4 le long d'une zone de jonction 40 formée d'une surface plane.
Cette tringle porte-lisse 4 peut présenter une section en T couché 4a ou en J 4b selon
la forme des boucles 50 des lisses de tissage 5.With reference to FIGS. 2A and 2B, the
Les figures 5A et 5B illustrent une variante de réalisation d'une traverse 2', dans
laquelle le profilé de support 3' comporte une section sensiblement rectangulaire 30
dans laquelle est ménagée une rainure longitudinale 33 apte à recevoir la tringle
porte-lisse 4' le long d'une zone de jonction 40' formée au moins de deux surfaces
planes parallèles. La rainure longitudinale 33 peut être orientée parallèlement au plan
du profilé de support 3', conformément à l'exemple illustré, ou perpendiculairement
selon la forme de la tringle porte-lisse 4'. Cette tringle porte-lisse 4' peut présenter
une section en T couché prolongé d'une patte de jonction 4'a, en J retourné 4'b ou en
T inversé 4'c selon la forme des boucles 50 des lisses de tissage 5.FIGS. 5A and 5B illustrate an alternative embodiment of a
Dans tous les cas, la section sensiblement rectangulaire 30 du profilé de support 3, 3'
comporte un évidement central 32 qui a l'avantage de réduire sa masse et son coût
matière. Ce profilé de support 3, 3' peut avoir d'autres sections par exemple en I.In all cases, the substantially
En référence aux figures 3A à D, le procédé de fabrication selon l'invention d'une
traverse 2, 2' comporte au moins les étapes suivantes :
Le gabarit 7 et le profilé de support 3, 3' comportent des formes complémentaires
d'emboítement permettant le positionnement précis du profilé de support 3, 3' par
rapport à la tringle porte-lisse 4, 4'. Dans les exemples représentés, le gabarit 7
comporte une seconde rainure 71 dont au moins les extrémités sont rectilignes et
parallèles à la première rainure 70. Cette seconde rainure 71 présente une largeur
supérieure à la largeur totale de la section sensiblement rectangulaire 30 du profilé de
support 3, 3'. On utilise, dans cet exemple de réalisation, des organes de
positionnement 9 agencés pour être montés aux extrémités du profilé de support 3, 3',
ces organes de positionnement 9 présentant une largeur sensiblement égale à celle
des extrémités de la seconde rainure 71. Dans cet exemple, les formes
complémentaires d'emboítement sont constituées par les organes de positionnement 9
et les extrémités de la seconde rainure 71. On peut bien entendu prévoir d'autres
formes équivalentes.The
Ces organes de positionnement 9 sont constitués en référence à la figure 3C d'une
plaque 90 en forme de T, la jambe du T formant une partie mâle apte à s'emboíter
dans l'évidement central 32 du profilé de support 3, 3' et la barre du T ayant une
largeur égale à celle des extrémités de la rainure 71 du gabarit 7. Le procédé de
fabrication comporte alors une étape dans laquelle on place des organes de
positionnement 9 dans les extrémités du profilé de support 3, 3' (cf. fig. 3C) avant de
placer ledit profilé de support 3, 3' dans le gabarit 7. These
L'utilisation de ces organes de positionnement 9, ou de tout autre moyen équivalent,
permet de garantir un positionnement précis des extrémités du profilé de support 3, 3'
par rapport à la tringle porte-lisse 4, 4' quelle que soit la rectitude du profilé de
support 3, 3'. Ainsi l'intervalle I entre l'axe A passant par le centre de l'évidement
central 32 aux extrémités du profilé de support 3, 3' et l'axe central B de la tringle
porte-lisse 4, 4' (cf. fig. 1) est précis et constant sur l'ensemble des traverses 2, 2'
fabriquées selon ce procédé, quelle que soit la rectitude du profilé de support 3, 3'.The use of these
Dans le but de fabriquer un nombre n de traverses 2, 2', on peut utiliser un nombre n
de gabarit 7 identiques que l'on superpose comme illustré à la figure 4. Dans ce cas,
les gabarits 7 ont une partie arrière plus large que leur partie avant formant
respectivement une zone d'emboítement femelle 72 et une zone d'emboítement mâle
73. La partie arrière comporte deux rebords longitudinaux 74 délimitant la zone
d'emboítement femelle 72, l'intervalle entre ces deux rebords longitudinaux 74
correspondant à la largeur de la zone d'emboítement mâle 73.In order to make a number n of
Ce procédé de fabrication permet donc de réaliser une traverse 2, 2' dans laquelle la
tringle porte-lisse 4, 4' est fixée solidairement au profilé de support 3, 3' par collage
dans une position rectiligne obtenue au moyen du gabarit 7 agencé pour maintenir
cette tringle porte-lisse 4, 4' par rapport au profilé de support 3,3' dans cette position
au moins pendant le temps de prise de la colle.This manufacturing process therefore makes it possible to produce a
Ce procédé de fabrication est particulièrement avantageux quand on utilise un profilé
de support 3, 3' qui est réalisé dans une matière rigide mais qui n'a pas forcément une
géométrie rectiligne ainsi qu'une tringle porte-lisse 4, 4' qui n'a pas forcément une
géométrie rectiligne à l'état libre mais qui est réalisée dans une matière non rigide
autorisant un redressage. Cette différence de rigidité est obtenue par le choix des
matières mais aussi par les différences de section, la section de la tringle porte-lisse
4, 4' étant nettement inférieure à celle du profilé de support 3, 3'. Avant d'assembler
solidairement le profilé de support 3, 3' à la tringle porte-lisse 4, 4', cette tringle
porte-lisse 4, 4', qui constitue la partie fonctionnelle de la traverse 2, 2', est figée dans
une position rectiligne imposée par le gabarit 7. Le profilé de support 3, 3'est ensuite
assemblé à cette tringle porte-lisse 4, 4' sans subir de déformation sensible dans le
plan dudit profilé. Après assemblage, lors du retrait de la traverse 2, 2' obtenue du
gabarit 7, la tringle porte-lisse 4, 4' reste dans sa position rectiligne compte tenu de la
grande différence de rigidité entre le profilé de support 3, 3' et la tringle porte-lisse 4,
4'. En effet, si la tringle porte-lisse 4, 4' tend à reprendre sa forme d'origine, le profilé
de support 3, 3' étant beaucoup plus rigide, s'oppose à toute déformation et fige la
tringle porte-lisse 4, 4' dans la position imposée par le gabarit 7.This manufacturing process is particularly advantageous when using a
Ce procédé de fabrication est donc particulièrement adapté aux profilés de support 3,
3' réalisés en matériaux composites et obtenus selon un procédé continu tel que
l'extrusion ou la pultrusion. Ces matériaux composites sont par exemple des résines
thermodures à base de fibres de carbone, de verre ou d'autres fibres. Ils ont
l'avantage de conférer au profilé de support 3, 3' une très grande rigidité augmentant
sa tenue mécanique à la fatigue tout en réduisant considérablement son poids. Le
défaut de rectitude lié à l'utilisation de ces matériaux composites n'est plus un
inconvénient grâce à la combinaison du gabarit 7 et des organes de positionnement 9
ou de tout autre moyen équivalent. Toutefois, ce procédé de fabrication peut
également être avantageux pour des profilés de support 3, 3' réalisés de manière
traditionnelle en alliage d'aluminium afin d'éliminer l'étape préalable de redressage.
Dans ce cas, le collage peut être remplacé par du rivetage ou tout moyen équivalent.This manufacturing process is therefore particularly suitable for
La présente invention n'est pas limitée à l'exemple de réalisation décrit mais s'étend à toute modification et variante évidentes pour un homme du métier tout en restant dans l'étendue de la protection définie dans les revendications annexées.The present invention is not limited to the embodiment described but extends to any modification and variant obvious to a person skilled in the art while remaining within the scope of protection defined in the appended claims.
Claims (13)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0200961A FR2835264B1 (en) | 2002-01-25 | 2002-01-25 | METHOD FOR MANUFACTURING A BUSHING FOR A WEAVING MACHINE SMOOTH FRAME AND A BUSHING OBTAINED BY SAID METHOD |
FR0200961 | 2002-01-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1331293A1 true EP1331293A1 (en) | 2003-07-30 |
EP1331293B1 EP1331293B1 (en) | 2006-03-22 |
Family
ID=8871411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03360003A Expired - Lifetime EP1331293B1 (en) | 2002-01-25 | 2003-01-10 | Method of fabricating a heddle frame slat for the heddle frame of a weaving machine and a heddle frame slat obtained by such method |
Country Status (6)
Country | Link |
---|---|
US (1) | US6926042B2 (en) |
EP (1) | EP1331293B1 (en) |
CN (1) | CN1324180C (en) |
AT (1) | ATE321160T1 (en) |
DE (2) | DE03360003T1 (en) |
FR (1) | FR2835264B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113737351A (en) * | 2021-10-14 | 2021-12-03 | 西安康本材料有限公司 | PAN fiber beating-up device |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10319959B4 (en) * | 2003-05-02 | 2007-02-01 | Groz-Beckert Kg | Weave for a loom |
DE102004059319A1 (en) * | 2004-12-02 | 2006-06-08 | Picanol N.V. | heald |
DE102005029699B3 (en) * | 2005-06-24 | 2007-02-08 | Groz-Beckert Kg | heald |
DE102005029700B3 (en) * | 2005-06-24 | 2006-10-12 | Groz-Beckert Kg | Side of heald frame for a loom has drive connection formed by a one-piece extension of the flat sides of a folded sheet metal part |
DE602005018660D1 (en) * | 2005-11-23 | 2010-02-11 | First Spa | Shaft rod for a heald frame of a weaving machine, with improved attachment of the heald support rail |
BE1017334A3 (en) * | 2006-10-05 | 2008-06-03 | Picanol Nv | WEAVING FRAME WITH REINFORCEMENT PROFILE FOR A WEAVING MACHINE. |
WO2016004610A1 (en) * | 2014-07-10 | 2016-01-14 | 姚红丽 | Improved textile loom |
CN112935845A (en) * | 2021-02-03 | 2021-06-11 | 上海拓璞数控科技股份有限公司 | Composite material frame structure of gantry type multi-axis machining center and machining center |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3754577A (en) * | 1968-09-13 | 1973-08-28 | Contraves Ag | Harness frame support rod possessing increased bending strength |
US4633916A (en) * | 1985-06-24 | 1987-01-06 | Rast John L | Roll-formed shear-resistant frame slat |
EP0302798A2 (en) * | 1987-08-06 | 1989-02-08 | Steel Heddle Mfg. Co. | Harness frame slat and heddle |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US463916A (en) * | 1891-11-24 | Shearing-roll for cutting blanks for fence-posts | ||
US4036263A (en) * | 1976-06-14 | 1977-07-19 | Steel Heddle Manufacturing Company | Heddle frame |
US4706717A (en) * | 1986-08-25 | 1987-11-17 | Steel Heddle Manufacturing Co., Inc. | Heddle frame for a high speed weaving machine |
US4913194A (en) * | 1988-11-18 | 1990-04-03 | Steel Heddle Mfg. Co. | Light weight heddle frame assembly slat |
JPH03124835A (en) * | 1989-10-04 | 1991-05-28 | Arisawa Mfg Co Ltd | Heald frame horizontal beam member for weaving machine and its production |
CN1024359C (en) * | 1991-06-29 | 1994-04-27 | 广野精机有限公司 | Harness mechanism of webbing loom |
JPH06128835A (en) * | 1992-10-16 | 1994-05-10 | Aamo:Kk | Cross beam for healed frame and its production |
DE4403923C1 (en) * | 1994-02-08 | 1995-07-27 | Grob & Co Ag | Side support for a heald frame |
JPH0841750A (en) * | 1994-07-29 | 1996-02-13 | Mic Kogyo Kk | Guide plate of heald frame |
JPH08325884A (en) * | 1995-05-29 | 1996-12-10 | Nitto Denko Corp | Beam material for heald frame |
-
2002
- 2002-01-25 FR FR0200961A patent/FR2835264B1/en not_active Expired - Fee Related
-
2003
- 2003-01-10 EP EP03360003A patent/EP1331293B1/en not_active Expired - Lifetime
- 2003-01-10 DE DE0001331293T patent/DE03360003T1/en active Pending
- 2003-01-10 AT AT03360003T patent/ATE321160T1/en not_active IP Right Cessation
- 2003-01-10 DE DE60304145T patent/DE60304145T2/en not_active Expired - Lifetime
- 2003-01-24 US US10/349,996 patent/US6926042B2/en not_active Expired - Lifetime
- 2003-01-24 CN CNB031054447A patent/CN1324180C/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3754577A (en) * | 1968-09-13 | 1973-08-28 | Contraves Ag | Harness frame support rod possessing increased bending strength |
US4633916A (en) * | 1985-06-24 | 1987-01-06 | Rast John L | Roll-formed shear-resistant frame slat |
EP0302798A2 (en) * | 1987-08-06 | 1989-02-08 | Steel Heddle Mfg. Co. | Harness frame slat and heddle |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113737351A (en) * | 2021-10-14 | 2021-12-03 | 西安康本材料有限公司 | PAN fiber beating-up device |
Also Published As
Publication number | Publication date |
---|---|
EP1331293B1 (en) | 2006-03-22 |
CN1324180C (en) | 2007-07-04 |
ATE321160T1 (en) | 2006-04-15 |
DE60304145T2 (en) | 2006-12-21 |
DE60304145D1 (en) | 2006-05-11 |
FR2835264A1 (en) | 2003-08-01 |
FR2835264B1 (en) | 2004-05-21 |
US6926042B2 (en) | 2005-08-09 |
CN1441101A (en) | 2003-09-10 |
US20030140981A1 (en) | 2003-07-31 |
DE03360003T1 (en) | 2004-04-15 |
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