WO2004028944A2 - Method for setting a yarn on a holder - Google Patents

Method for setting a yarn on a holder Download PDF

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Publication number
WO2004028944A2
WO2004028944A2 PCT/FR2003/002821 FR0302821W WO2004028944A2 WO 2004028944 A2 WO2004028944 A2 WO 2004028944A2 FR 0302821 W FR0302821 W FR 0302821W WO 2004028944 A2 WO2004028944 A2 WO 2004028944A2
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WO
WIPO (PCT)
Prior art keywords
crossing
speed
constant
wire
support
Prior art date
Application number
PCT/FR2003/002821
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French (fr)
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WO2004028944A3 (en
Inventor
Philippe Flechon
Florent Beauducel
Jean-Baptiste Droc
Original Assignee
Rieter Textile Machinery France
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
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Application filed by Rieter Textile Machinery France filed Critical Rieter Textile Machinery France
Priority to AU2003279435A priority Critical patent/AU2003279435A1/en
Publication of WO2004028944A2 publication Critical patent/WO2004028944A2/en
Publication of WO2004028944A3 publication Critical patent/WO2004028944A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/38—Arrangements for preventing ribbon winding ; Arrangements for preventing irregular edge forming, e.g. edge raising or yarn falling from the edge
    • B65H54/385—Preventing edge raising, e.g. creeping arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to the technical sector of winding a textile thread on a support, generally in the form of a cylindrical mandrel capable of being driven in rotation.
  • the cylindrical mandrel, or support can be rotated either by its axis, or by one of its generatrices.
  • This winding can be used for spinning operations, drawing, texturing, twisting, assembly, winding, ...
  • the wire is distributed according to a generator along the coil, in the form of inclined and parallel turns.
  • the speed of movement of the thread guide, between the two ends of the spool is constant and determines, in combination with the winding speed, the average crossing angle. This speed will be called, thereafter, constant crossing speed.
  • the deposition of the wire on the support is generally characterized by a series of straight segments of alternating inclinations.
  • the connections of these segments, at the end of the coil or other support, are constituted by pseudo-rays.
  • pseudo-rays act directly on the quality of the winding.
  • the more these pseudo-radii have a small radius of curvature the more the quantity of wire deposited at the ends of the coil is reduced, thereby significantly improving the quality of the winding.
  • numerous technical solutions have been proposed, generally in the form of reciprocating devices, the reversal times of which are minimized. These back and forth movements are obtained by mechanical and / or electronic means.
  • the means are shaped to obtain the fastest possible reversal time, by subjecting said thread guide to a constant crossing speed, to deceleration and to re-acceleration in the opposite direction, such a cycle being repetitive.
  • this operating cycle in order to improve the quality of the inversion, it is necessary to act on the value of the deceleration and / or of the acceleration with, for limits, those imposed by the technique.
  • the problem which the invention proposes to solve is to push the limits of the quality of depositing the wire on inversion or to reduce the mechanical stresses while maintaining an identical quality of deposit whatever the technique used, in particular for the realization of the back and forth system.
  • the previous cycle namely: constant speed of crossing, deceleration, re-acceleration in opposite direction, constant speed of crossing
  • the previous cycle namely: constant speed of crossing, deceleration, re-acceleration in opposite direction, constant speed of crossing
  • the originality of the invention lies in exceeding this constant crossing speed, in order to improve the quality depositing the wire on its support.
  • the introduction of an overshoot of the constant crossing speed, after the effective reversal of the thread guide, makes it possible to accelerate the return of the train, at the angle of average crossover and therefore significantly reduce the effective changeover angle change time on the reel.
  • a reduction in the mean radius of curvature is obtained when the wire is deposited at the ends of the coil.
  • the principle underlying the invention makes it possible either to improve the quality of depositing the wire at the ends of the coil, with similar mechanical constraints in terms of acceleration, or reduce the mechanical stresses due to accelerations, while maintaining a similar winding quality.
  • the value and the duration of the overspeed are the result of the kinematics and can be chosen so that on average, over the range of the winding speeds and crossing, the amount of wire deposited during the inversion cycle is substantially equivalent to what would be obtained, for example, with a conventional cam which would have a symmetrical inversion profile and greater levels of acceleration.
  • the overshoot time and the overshoot value of the constant crossing speed can be optimized as a function of the winding parameters (speed, mean crossing angle, accelerations), so that the quantity of wire deposited during the reverse direction cycle is the same as that of the we would have obtained with a conventional cam having a symmetrical profile without it being necessary to impose on the engine acceleration levels as high as those obtained with such a cam.
  • FIG. 1 shows the diagram of the speed profile of the wire guide, the dashed line corresponding to the solutions of the prior art, that is to say without exceeding the constant speed of crossing, while the solid line plot corresponds to the speed profile with exceeding the constant crossing speed;
  • FIG. 1 shows the diagram of the crossing angle, the line drawn in dashed lines corresponding to the wire guide obtained without exceeding the constant speed of crossing, while the line drawn in solid lines corresponds to the profile obtained with speed exceeded crossing constant;
  • FIG 3 is a schematic plan view of an example of a mechanical technical solution for the implementation of the method according to the invention.
  • the dotted lines show the result obtained with a conventional speed profile, generally symmetrical, for a given and constant level of acceleration during the reversal phase.
  • the acceleration imposed during the inversion phase is reduced, as can be seen on the curve in FIG. 1.
  • the speed variation is therefore slower but is extended beyond the constant speed of intended crossing.
  • the acceleration is then reversed so that the speed returns to said constant crossing speed.
  • the quantity of wire deposited during the inversion process is lower than that deposited in the overspeed phase. It is therefore possible, by modulating the amplitude and the duration of this overspeed, to ensure that in total, the two effects cancel each other out and that the total quantity of thread deposited during the cycle is equivalent to that of a symmetrical conventional cam, without, however, involving such high acceleration levels.
  • Illustrated in Figure 3 of the drawings is an embodiment of a winding system implementing the method according to the invention.
  • the wire is wound up on a spool (1) driven in rotation by a call cylinder (R) for example.
  • R call cylinder
  • the wire is distributed by means of a wire guide (2) displaceable in translation, parallel to the generators of the support coil (1).
  • the winding device comprises a carriage (3) receiving the thread guide (2).
  • This carriage (3) has coupling arrangements with a flexible transmission and drive member (4), capable of giving the wire guide (2) a back and forth movement in combination with guiding means in translation. , parallel to the generators of the coil (1).
  • the flexible transmission and drive member is advantageously constituted by a toothed belt (4) mounted between two toothed wheels (5) and (6), at least one of which is driven in rotation.
  • the toothed wheel (6) is rotated by a motor (7), while the toothed wheel (5) acts as a gear.
  • the belt (4) is tensioned between the two pulleys (5) and (6).
  • the carriage coupling arrangements (3) are made integral with a portion of the belt (4), so as to subject the movement back and forth following the contour of the belt.
  • the coupling arrangements of the carriage (3) with the part of the belt (4) consist of a pivot type connection (10).
  • the linear guidance of the carriage (3) is effected by means of a pin (11) engaged in a rectilinear groove (12a) formed in the thickness of a support plate (12), parallel to the generators of the coil (1).
  • the plate (12) can be in two parts delimiting a free space inside which the carriage (3) is moved.
  • One of the plates has a central lumen (12e), of generally oblong shape, for mounting and engaging the set of wheels (5) and (6) and the drive belt (4).
  • the wire guide (2), the guide pin (11) and the coupling pivot (10) are angularly offset on the carriage (3), to create an additional speed component in the vicinity of the points inversion.
  • the wire guide (2), the guide pin (11), the coupling pivot (10), are arranged according to the three vertices of a triangle, advantageously but not limited to, in the form of a right triangle .
  • the carriage (3) is L-shaped profile constituting two arms (3a) and (3b) offset angularly, by substantially 90 °.
  • the thread guide is arranged at the free end of the arm (3a), while the coupling pivot (10) with the belt (4), are arranged at the free end of the arm (3b).
  • the guide pin (11) is disposed between the wire guide (2) and the coupling pivot (10), at the connection of the two arms (3 a) and (3b).
  • point (C) describes a path which follows the oblong outline of the drive belt (4) driven by the wheels (5) and (6).
  • the point (B) is therefore subjected to a translational movement along the groove (12a).
  • the point (A) has a linear trajectory when the point (C) is located between the pulleys (dashed lines, Figure 1), while a speed component is added when the point (C) passes from one side to the other of one of the wheels (5) or (6), at each of the ends.
  • the two toothed wheels (5) and (6) are arranged along an axis forming an angle ( ⁇ ) with the groove (12a) in which the pin (11) moves.
  • This angle ( ⁇ ) makes it possible to vary the stroke of the thread guide (2) and, consequently, the thread removal stroke. Under these conditions, to proceed to stroke variations, it suffices to adjust the angle ( ⁇ ) by any known and appropriate means.

Abstract

The invention concerns a method for setting a yarn on a holder during a winding process using a yarn guide mobile along the generators of the holder at a constant traverse speed with displacement direction changeover at the ends of said holder forming a traverse angle. The invention is characterized in that after the displacement direction reversal resulting from deceleration followed by acceleration, the constant traverse speed is exceeded thereby providing the desired traverse angle, the amplitude and duration of the excess speed(s) being determined to adjust the mean radius of curvature of the yarn setting at the ends of the holder.

Description

PROCEDE POUR LA DEPOSE D'UN FIL SUR UN SUPPORT PROCESS FOR THE DEPOSITION OF A WIRE ON A SUPPORT
L'invention se rattache au secteur technique du renvidage d'un fil textile sur un support, généralement sous forme d'un mandrin cylindrique apte à être entraîné en rotation. Le mandrin cylindrique, ou support, peut être entraîné en rotation soit par son axe, soit par une de ses génératrices. Ce renvidage peut être utilisé pour des opérations de filature, d'étirage, de texturation, de torsion, d'assemblage, de bobinage, ...The invention relates to the technical sector of winding a textile thread on a support, generally in the form of a cylindrical mandrel capable of being driven in rotation. The cylindrical mandrel, or support, can be rotated either by its axis, or by one of its generatrices. This winding can be used for spinning operations, drawing, texturing, twisting, assembly, winding, ...
On rappelle, d'une manière parfaitement connue pour un homme du métier, que le fil est distribué selon une génératrice le long de la bobine, sous forme de spires inclinées et parallèles. Généralement, la vitesse de déplacement du guide-fil, entre les deux extrémités de la bobine, est constante et détermine, en combinaison avec la vitesse de bobinage, l'angle de croisure moyen. Cette vitesse sera appelée, par la suite, vitesse constante de traversée. Par contre, il est nécessaire d'effectuer l'inversion du mouvement aux extrémités de la bobine, le plus rapidement possible, afin d'éviter que les bords de celle-ci ne soient pas plus épais que son centre.It will be recalled, in a manner perfectly known to a person skilled in the art, that the wire is distributed according to a generator along the coil, in the form of inclined and parallel turns. Generally, the speed of movement of the thread guide, between the two ends of the spool, is constant and determines, in combination with the winding speed, the average crossing angle. This speed will be called, thereafter, constant crossing speed. On the other hand, it is necessary to invert the movement at the ends of the coil, as quickly as possible, in order to avoid that the edges of the latter are not thicker than its center.
En effet, la dépose du fil sur le support est généralement caractérisée par une suite de segments droits d'inclinaisons alternées. Les raccordements de ces segments, à l'extrémité de la bobine ou autre support, sont constitués par des pseudo-rayons. Or, il est apparu que ces pseudo-rayons de raccordement agissent directement sur la qualité du bobinage. Notamment, il s'est avéré que plus ces pseudo-rayons ont un rayon de courbure faible, plus la quantité de fil déposée aux extrémités de la bobine est réduite, améliorant ainsi, d'une manière importante la qualité du bobinage. Pour réduire ce rayon de courbure, de nombreuses solutions techniques ont été proposées, sous forme généralement de dispositifs de va et vient, dont les temps d'inversion sont minimisés. Ces mouvements de va et vient sont obtenus par des moyens mécaniques et/ou électroniques.Indeed, the deposition of the wire on the support is generally characterized by a series of straight segments of alternating inclinations. The connections of these segments, at the end of the coil or other support, are constituted by pseudo-rays. However, it appeared that these pseudo-connecting radii act directly on the quality of the winding. In particular, it has been found that the more these pseudo-radii have a small radius of curvature, the more the quantity of wire deposited at the ends of the coil is reduced, thereby significantly improving the quality of the winding. To reduce this radius of curvature, numerous technical solutions have been proposed, generally in the form of reciprocating devices, the reversal times of which are minimized. These back and forth movements are obtained by mechanical and / or electronic means.
Selon un exemple de mise en œuvre, les moyens sont conformés pour obtenir un temps d'inversion le plus rapide possible, en soumettant ledit guide-fil à une vitesse constante de traversée, à une décélération et à une re-accélération en sens inverse, un tel cycle étant répétitif. Compte tenu de ce cycle de fonctionnement, pour améliorer la qualité de l'inversion, il est nécessaire d'agir sur la valeur de la décélération et/ou de l'accélération avec, pour limites , celles imposées par la technique.According to an exemplary implementation, the means are shaped to obtain the fastest possible reversal time, by subjecting said thread guide to a constant crossing speed, to deceleration and to re-acceleration in the opposite direction, such a cycle being repetitive. In view of this operating cycle, in order to improve the quality of the inversion, it is necessary to act on the value of the deceleration and / or of the acceleration with, for limits, those imposed by the technique.
Le problème que se propose de résoudre l'invention est de repousser les limites de la qualité de dépose du fil à l'inversion ou de réduire les contraintes mécaniques en conservant une qualité de dépose identique quelle que soit la technique utilisée, notamment pour la réalisation du système de va et vient.The problem which the invention proposes to solve is to push the limits of the quality of depositing the wire on inversion or to reduce the mechanical stresses while maintaining an identical quality of deposit whatever the technique used, in particular for the realization of the back and forth system.
Pour résoudre un tel problème, le cycle précédent, à savoir : vitesse constante de traversée, décélération, re-accélération en sens inverse, vitesse constante de traversée, est remplacé par le cycle suivant : vitesse constante de traversée, décélération, re-accélération en sens inverse, dépassement de la vitesse constante de traversée, décélération, vitesse constante de traversée. En opposition aux techniques actuellement utilisées, qui sont basées sur le fait de respecter la vitesse constante de traversée qui donne la croisure, l'originalité de l'invention se trouve dans le dépassement de cette vitesse constante de traversée, afin d'améliorer la qualité de dépose du fil sur son support.To solve such a problem, the previous cycle, namely: constant speed of crossing, deceleration, re-acceleration in opposite direction, constant speed of crossing, is replaced by the following cycle: constant speed of crossing, deceleration, re-acceleration in opposite direction, exceeding the constant crossing speed, deceleration, constant crossing speed. In contrast to the techniques currently used, which are based on respecting the constant crossing speed which gives the crossing, the originality of the invention lies in exceeding this constant crossing speed, in order to improve the quality depositing the wire on its support.
On a constaté que le guide-fil est toujours éloigné de la génératrice d'appel sur la bobine compte tenu de son encombrement. Cette distance, qui est constante lorsque le déplacement du guide-fil est parallèle à la génératrice, induit une traîne dont l'importance est liée à l'angle de croisure. Lors de l'inversion de sens, aux extrémités de la bobine, cette traîne induit un retard entre le moment où le guide-fil est reparti en sens inverse, à la vitesse constante de traversée, et celui où l'angle de la traîne formant l'angle de croisure sur la bobine, a retrouvé sa vitesse constante de traversée. Or, on a pu déterminer, par calcul, que l'angle de croisure après l'inversion effective du guide-fil, rejoint d'une manière asymptotique sa vitesse constante de traversée. Il en résulte, sur la bobine, une dépose de fil avec un important rayon de courbure après l'inversion.It has been found that the wire guide is always far from the call generator on the spool given its size. This distance, which is constant when the movement of the wire guide is parallel to the generator, induces a train, the importance of which is linked to the crossing angle. During the reversal of direction, at the ends of the spool, this train induces a delay between the moment when the thread guide left in the opposite direction, at the constant speed of crossing, and that when the angle of the train forming the crossing angle on the reel has regained its constant crossing speed. However, it has been possible to determine, by calculation, that the crossing angle after the effective inversion of the thread guide, asymptotically reaches its constant crossing speed. This results, on the reel, depositing a wire with a large radius of curvature after the inversion.
Pour tenter de réduire ce rayon de courbure, selon l'état de la technique, la distance entre le guide-fil et la génératrice de rappel sur la bobine, est toujours minimisée.In an attempt to reduce this radius of curvature, according to the state of the art, the distance between the wire guide and the return generator on the spool is always minimized.
Selon les caractéristiques à la base de l'invention, l'introduction d'un dépassement de la vitesse constante de traversée, après l'inversion effective du guide-fil, permet d'accélérer le retour de la traîne, à l'angle de croisure moyen et, par conséquent, de réduire de manière significative, le temps de changement d'angle de croisure effectif sur la bobine. D'une manière concomitante, on obtient une réduction du rayon moyen de courbure de la dépose du fil aux extrémités de la bobine.According to the basic characteristics of the invention, the introduction of an overshoot of the constant crossing speed, after the effective reversal of the thread guide, makes it possible to accelerate the return of the train, at the angle of average crossover and therefore significantly reduce the effective changeover angle change time on the reel. In a way concomitant, a reduction in the mean radius of curvature is obtained when the wire is deposited at the ends of the coil.
Dans ces conditions, étant donné que la distance entre la génératrice d'appel et le guide de fil, est connue, il est possible de déterminer et d'optimiser les valeurs de décélération, d'accélération, de dépassement de la vitesse constante de traversée et de seconde décélération, afin d'obtenir un rayon de courbure moyen de dépose réduit au minimum pour un angle de croisure moyen donné.In these conditions, since the distance between the call generator and the wire guide is known, it is possible to determine and optimize the values of deceleration, acceleration, exceeding the constant crossing speed and a second deceleration, in order to obtain an average radius of curvature of deposit reduced to the minimum for a given average crossing angle.
Si le profil de vitesse du guide-fil est modifiable, le principe à la base de l'invention permet, soit d'améliorer la qualité de dépose du fil aux extrémités de la bobine, avec des contraintes mécaniques similaires en terme d'accélération, soit de réduire les contraintes mécaniques dues aux accélérations, tout en conservant une qualité de bobinage similaire.If the speed profile of the wire guide is modifiable, the principle underlying the invention makes it possible either to improve the quality of depositing the wire at the ends of the coil, with similar mechanical constraints in terms of acceleration, or reduce the mechanical stresses due to accelerations, while maintaining a similar winding quality.
Dans le cas où le déplacement du guide-fil est contrôlé par des moyens mécaniques, la valeur et la durée de la survitesse, sont le résultat de la cinématique et peuvent être choisis pour qu'en moyenne, sur la plage des vitesses de bobinage et de traversée, la quantité de fil déposée pendant le cycle de renversement soit sensiblement équivalente à ce que l'on obtiendrait, par exemple, avec une came conventionnelle qui présenterait un profil de renversement symétrique et des niveaux d'accélération plus importants.In the case where the displacement of the thread guide is controlled by mechanical means, the value and the duration of the overspeed, are the result of the kinematics and can be chosen so that on average, over the range of the winding speeds and crossing, the amount of wire deposited during the inversion cycle is substantially equivalent to what would be obtained, for example, with a conventional cam which would have a symmetrical inversion profile and greater levels of acceleration.
Dans le cas où le déplacement du guide-fil est contrôlé par des moyens électroniques, le temps de dépassement et la valeur du dépassement de la vitesse constante de traversée peuvent être optimisés en fonction des paramètres de bobinage (vitesse, angle moyen de croisure, accélérations), de sorte que la quantité de fil déposée pendant le cycle d'inversion de sens soit la même que celle que l'on aurait obtenue avec une came conventionnelle ayant un profil symétrique sans qu'il soit nécessaire d'imposer au moteur des niveaux d'accélération aussi élevés que ceux obtenus avec une telle came.In the case where the movement of the thread guide is controlled by electronic means, the overshoot time and the overshoot value of the constant crossing speed can be optimized as a function of the winding parameters (speed, mean crossing angle, accelerations), so that the quantity of wire deposited during the reverse direction cycle is the same as that of the we would have obtained with a conventional cam having a symmetrical profile without it being necessary to impose on the engine acceleration levels as high as those obtained with such a cam.
Dans le cas d'un pilotage électronique, il est possible de moduler le dépassement de vitesse en valeur et en durée, en combinaison avec les réductions de courses réalisées pour réduire l'accumulation de fil aux extrémités du bobinage.In the case of electronic control, it is possible to modulate the speeding in value and in duration, in combination with the stroke reductions carried out to reduce the accumulation of wire at the ends of the winding.
L'invention est exposée ci-après plus en détail à l'aide des figures des dessins annexés dans lesquels :The invention is set out below in more detail with the aid of the figures of the appended drawings in which:
- la figure 1 montre le diagramme du profil de vitesse du guide-fil, le tracé en traits interrompus correspondant aux solutions de l'état de la technique, c'est-à-dire sans dépassement de la vitesse constante de traversée, tandis que le tracé en traits pleins correspond au profil de vitesse avec dépassement de la vitesse constante de traversée ;- Figure 1 shows the diagram of the speed profile of the wire guide, the dashed line corresponding to the solutions of the prior art, that is to say without exceeding the constant speed of crossing, while the solid line plot corresponds to the speed profile with exceeding the constant crossing speed;
- la figure 2 montre le diagramme de l'angle de croisure, le tracé en traits interrompus correspondant au guide-fil obtenu sans dépassement de la vitesse constante de traversée, tandis que le tracé en traits pleins correspond au profil obtenu avec dépassement de la vitesse constante de traversée ; - la figure 3 est une vue en plan à caractère schématique d'un exemple d'une solution technique mécanique pour la mise en œuvre du procédé selon l'invention. Dans les figures 1 et 2, les tracés en pointillés montrent le résultat obtenu avec un profil conventionnel de vitesse, en général symétrique, pour un niveau d'accélération donné et constant pendant la phase de renversement.- Figure 2 shows the diagram of the crossing angle, the line drawn in dashed lines corresponding to the wire guide obtained without exceeding the constant speed of crossing, while the line drawn in solid lines corresponds to the profile obtained with speed exceeded crossing constant; - Figure 3 is a schematic plan view of an example of a mechanical technical solution for the implementation of the method according to the invention. In Figures 1 and 2, the dotted lines show the result obtained with a conventional speed profile, generally symmetrical, for a given and constant level of acceleration during the reversal phase.
Selon le procédé de l'invention, l'accélération imposée pendant la phase de renversement est réduite, comme cela se voit sur la courbe de la figure 1. La variation de vitesse est donc plus lente mais est prolongée au- delà de la vitesse constante de traversée visée. L'accélération est ensuite inversée pour que la vitesse revienne à ladite vitesse constante de traversée.According to the method of the invention, the acceleration imposed during the inversion phase is reduced, as can be seen on the curve in FIG. 1. The speed variation is therefore slower but is extended beyond the constant speed of intended crossing. The acceleration is then reversed so that the speed returns to said constant crossing speed.
Comme on le voit sur la figure 2, la dépose de fil, représentée ici par son angle de croisure local résultant de la traînée, tend asymptotiquement vers sa valeur constante avec un système conventionnel (courbe pointillée), alors qu'il l'atteint rapidement avec le procédé selon l'invention (courbe continue).As seen in Figure 2, the wire deposition, represented here by its local crossing angle resulting from the drag, tends asymptotically towards its constant value with a conventional system (dotted curve), while it reaches it quickly with the process according to the invention (continuous curve).
Ainsi, avec le procédé conforme à l'invention, la quantité de fil déposée pendant le processus de renversement est plus faible que celle déposée dans la phase de survitesse. Il est possible, par conséquent, en modulant l'amplitude et la durée de cette survitesse, de faire en sorte qu'au total, les deux effets s'annulent et que la quantité totale de fil déposée au cours du cycle soit équivalente à celle d'une came conventionnelle symétrique, sans, pour autant, mettre enjeu des niveaux d'accélération aussi élevés. On a illustré à la figure 3 des dessins un exemple de réalisation d'un système de renvidage mettant en œuvre le procédé conforme à l'invention. Le renvidage du fil s'effectue sur une bobine (1) entraînée en rotation par un cylindre d'appel (R) par exemple. D'une manière connue, le fil est distribué au moyen d'un guide-fil (2) déplaçable en translation, de façon parallèle aux génératrices de la bobine support (1).Thus, with the method according to the invention, the quantity of wire deposited during the inversion process is lower than that deposited in the overspeed phase. It is therefore possible, by modulating the amplitude and the duration of this overspeed, to ensure that in total, the two effects cancel each other out and that the total quantity of thread deposited during the cycle is equivalent to that of a symmetrical conventional cam, without, however, involving such high acceleration levels. Illustrated in Figure 3 of the drawings is an embodiment of a winding system implementing the method according to the invention. The wire is wound up on a spool (1) driven in rotation by a call cylinder (R) for example. In a known manner, the wire is distributed by means of a wire guide (2) displaceable in translation, parallel to the generators of the support coil (1).
Le dispositif de renvidage comprend un chariot (3) recevant le guide- fil (2). Ce chariot (3) présente des agencements d'accouplement avec un organe de transmission et d'entraînement souple (4), apte à conférer au guide- fil (2) un mouvement de va et vient en combinaison avec des moyens de guidage en translation, d'une manière parallèle aux génératrices de la bobine (1). L'organe de transmission et d'entraînement souple, est avantageusement constitué par une courroie crantée (4) montée entre deux roues dentées (5) et (6) dont l'une au moins est entraînée en rotation.The winding device comprises a carriage (3) receiving the thread guide (2). This carriage (3) has coupling arrangements with a flexible transmission and drive member (4), capable of giving the wire guide (2) a back and forth movement in combination with guiding means in translation. , parallel to the generators of the coil (1). The flexible transmission and drive member is advantageously constituted by a toothed belt (4) mounted between two toothed wheels (5) and (6), at least one of which is driven in rotation.
Par exemple, la roue dentée (6) est entraînée en rotation par un moteur (7), tandis que la roue dentée (5) fait office de renvoi. La courroie (4) est mise en tension entre les deux poulies (5) et (6).For example, the toothed wheel (6) is rotated by a motor (7), while the toothed wheel (5) acts as a gear. The belt (4) is tensioned between the two pulleys (5) and (6).
Les agencements d'accouplement du chariot (3) sont rendus solidaires d'une partie de la courroie (4), de manière à assujettir le mouvement de va et vient au suivi du contour de la courroie. Par exemple, les agencements d'accouplement du chariot (3) avec la partie de la courroie (4) sont constitués par une liaison du type pivot (10).The carriage coupling arrangements (3) are made integral with a portion of the belt (4), so as to subject the movement back and forth following the contour of the belt. For example, the coupling arrangements of the carriage (3) with the part of the belt (4) consist of a pivot type connection (10).
Le guidage linéaire du chariot (3) s'effectue au moyen d'un pion (11) engagé dans une ramure rectiligne (12a) formée dans l'épaisseur d'une plaque-support (12), d'une manière parallèle aux génératrices de la bobine (1). La plaque (12) peut être en deux parties délimitant un espace libre à l'intérieur duquel est déplacé le chariot (3). L'une des plaques présente une lumière centrale (12e), de forme générale oblongue, pour le montage et l'engagement de l'ensemble des roues (5) et (6) et de la courroie d'entraînement (4).The linear guidance of the carriage (3) is effected by means of a pin (11) engaged in a rectilinear groove (12a) formed in the thickness of a support plate (12), parallel to the generators of the coil (1). The plate (12) can be in two parts delimiting a free space inside which the carriage (3) is moved. One of the plates has a central lumen (12e), of generally oblong shape, for mounting and engaging the set of wheels (5) and (6) and the drive belt (4).
Selon l'invention, le guide-fil (2), le pion de guidage (11) et le pivot d'accouplement (10) sont décalés angulairement sur le chariot (3), pour créer une composante de vitesse supplémentaire au voisinage des points d'inversion. Notamment, le guide-fil (2), le pion de guidage (11), le pivot d'accouplement (10), sont disposés selon les trois sommets d'un triangle, avantageusement mais non limitativement, sous forme d'un triangle rectangle.According to the invention, the wire guide (2), the guide pin (11) and the coupling pivot (10) are angularly offset on the carriage (3), to create an additional speed component in the vicinity of the points inversion. In particular, the wire guide (2), the guide pin (11), the coupling pivot (10), are arranged according to the three vertices of a triangle, advantageously but not limited to, in the form of a right triangle .
Compte tenu de ces dispositions, le chariot (3) est profilé en forme de L constituant deux bras (3 a) et (3b) décalés angulairement, de sensiblement 90°. Le guide-fil est disposé à l'extrémité libre du bras (3a), tandis que le pivot d'accouplement (10) avec la courroie (4), sont disposés au niveau de l'extrémité libre du bras (3b). Le pion de guidage (11) est disposé entre le guide-fil (2) et le pivot d'accouplement (10), au niveau du raccordement des deux bras (3 a) et (3b).In view of these provisions, the carriage (3) is L-shaped profile constituting two arms (3a) and (3b) offset angularly, by substantially 90 °. The thread guide is arranged at the free end of the arm (3a), while the coupling pivot (10) with the belt (4), are arranged at the free end of the arm (3b). The guide pin (11) is disposed between the wire guide (2) and the coupling pivot (10), at the connection of the two arms (3 a) and (3b).
On désigne par (A) le point de fixation du guide-fil (2) sur le bras (3 a), par (B) le point de fixation du pion de guidage (11), et par (C) le point de fixation du pivot d'accouplement (10). Si l'on considère l'exemple illustré, on forme un triangle rectangle en (B). Les distances (AB) et (BC) sont déterminées pour optimiser les temps d'inversion de l'extrémité (A). La distance entre les points (B) et (C) est supérieure au rayon des roues dentées (5) et (6).We designate by (A) the fixing point of the wire guide (2) on the arm (3 a), by (B) the fixing point of the guide pin (11), and by (C) the fixing point of the coupling pin (10). If we consider the example illustrated, we form a right triangle at (B). The distances (AB) and (BC) are determined to optimize the inversion times of the end (A). The distance between points (B) and (C) is greater than the radius of the gear wheels (5) and (6).
Compte tenu de ces dispositions, il en résulte que le point (C) décrit une trajectoire qui suit le contour oblong de la courroie d'entraînement (4) entraînée par les roues (5) et (6). Le point (B) est par conséquent soumis à un mouvement de translation le long de la rainure (12a). Le point (A) a une trajectoire linéaire lorsque le point (C) est situé entre les poulies (tracé traits interrompus, figure 1), tandis qu'une composante de vitesse est ajoutée lorsque le point (C) passe d'un côté à l'autre de l'une des roues (5) ou (6), à chacune des extrémités.In view of these provisions, it follows that point (C) describes a path which follows the oblong outline of the drive belt (4) driven by the wheels (5) and (6). The point (B) is therefore subjected to a translational movement along the groove (12a). The point (A) has a linear trajectory when the point (C) is located between the pulleys (dashed lines, Figure 1), while a speed component is added when the point (C) passes from one side to the other of one of the wheels (5) or (6), at each of the ends.
Les deux roues dentées (5) et (6) sont disposées selon un axe formant un angle (α) avec la rainure (12a) dans laquelle se déplace le pion (11). Cet angle (α) permet de faire varier la course du guide-fil (2) et, par conséquent, la course de dépose du fil. Dans ces conditions, pour procéder à des variations de course, il suffit de régler l'angle (α) par tout moyen connu et approprié.The two toothed wheels (5) and (6) are arranged along an axis forming an angle (α) with the groove (12a) in which the pin (11) moves. This angle (α) makes it possible to vary the stroke of the thread guide (2) and, consequently, the thread removal stroke. Under these conditions, to proceed to stroke variations, it suffices to adjust the angle (α) by any known and appropriate means.
Les avantages ressortent bien de la description. The advantages are apparent from the description.

Claims

R E V E N D I C A T I O N SR E V E N D I C A T I O N S
-1- Procédé pour la dépose d'un fil sur un support lors d'une opération de bobinage au moyen d'un guide-fil déplaçable le long des génératrices du support à une vitesse constante de traversée avec inversion du sens de mouvement aux extrémités dudit support créant un angle de croisure, caractérisé en ce q " après l'inversion du sens de mouvement résultant d'une décélération suivie d'une accélération, on réalise au moins un dépassement de la vitesse constante de traversée qui permet d'obtenir l'angle de croisure souhaité, l'amplitude et la durée du ou des dépassements étant déterminées pour ajuster le rayon moyen de courbure de dépose du fil aux extrémités du support, de sorte que le guide fil est soumis au cycle suivant : vitesse constante de traversée, décélération, ré-accélération en sens inverse, au moins un dépassement de la vitesse constante de traversée, décélération, vitesse de la traversée.-1- Method for depositing a wire on a support during a winding operation by means of a wire guide movable along the generatrices of the support at a constant crossing speed with inversion of the direction of movement at the ends of said support creating a crossing angle, characterized in that q "after reversing the direction of movement resulting from a deceleration followed by an acceleration, at least one exceeds the constant crossing speed which makes it possible to obtain l '' desired crossing angle, the amplitude and duration of the excess (s) being determined to adjust the average radius of curvature for depositing the wire at the ends of the support, so that the wire guide is subjected to the following cycle: constant speed of crossing , deceleration, re-acceleration in opposite direction, at least one crossing of the constant crossing speed, deceleration, crossing speed.
-2- Procédé selon la revendication 1, caractérisé en ce que l'on réalise le ou les dépassements de la vitesse constante de traversée par des moyens mécaniques.-2- Method according to claim 1, characterized in that one or more exceedances of the constant speed of crossing by mechanical means.
-3- Procédé selon la revendication 1, caractérisé en ce que l'on réalise le ou les dépassements de la vitesse constante de traversée par des moyens électroniques.-3- The method of claim 1, characterized in that one carries out or exceeding the constant speed of crossing by electronic means.
-4- Procédé selon la revendication 2 ou 3, caractérisé en ce que l'on module l'amplitude et la durée du ou des dépassements de la vitesse constante de traversée pour ajuster la quantité de fil déposée dans la zone d'inversion, proche de ce que l'on obtiendrait avec un procédé conventionnel.-4- The method of claim 2 or 3, characterized in that one modulates the amplitude and duration of or exceeding the constant speed of crossing to adjust the amount of wire deposited in the inversion zone, close to what would be obtained with a conventional process.
-5- Procédé selon la revendication 3, caractérisé en ce que l'on module l'amplitude et la durée du ou des dépassements de la vitesse constante de traversée en combinaison avec des moyens de réduction de la course du guide-fil, afin d'éviter l'accumulation de fil aux extrémités du support.-5- The method of claim 3, characterized in that one modulates the amplitude and duration of or exceeding the constant speed of crossing in combination with means for reducing the travel of the wire guide, in order to '' avoid the accumulation of wire at the ends of the support.
-6- Procédé selon la revendication 2, caractérisé en ce que l'on utilise des moyens mécaniques du type va et vient déterminés pour induire, à l'inversion, un ou plusieurs dépassements de la vitesse constante de traversée. -6- The method of claim 2, characterized in that one uses mechanical means of the type back and forth determined to induce, upon inversion, one or more exceedances of the constant speed of crossing.
PCT/FR2003/002821 2002-09-26 2003-09-25 Method for setting a yarn on a holder WO2004028944A2 (en)

Priority Applications (1)

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AU2003279435A AU2003279435A1 (en) 2002-09-26 2003-09-25 Method for setting a yarn on a holder

Applications Claiming Priority (2)

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FR02/12099 2002-09-26
FR0212099A FR2845072B1 (en) 2002-09-26 2002-09-26 METHOD FOR REMOVING A WIRE ON A SUPPORT

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WO2004028944A2 true WO2004028944A2 (en) 2004-04-08
WO2004028944A3 WO2004028944A3 (en) 2004-05-06

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2072424A5 (en) * 1969-11-26 1971-09-24 Barmag Barmer Maschf Winder traverse motion curved slot guide
DE3825413A1 (en) * 1988-07-27 1990-02-01 Schlafhorst & Co W Method for laying a thread on a cross-wound bobbin
EP0453622A1 (en) * 1990-04-23 1991-10-30 Ssm Schärer Schweiter Mettler Ag Method and apparatus for winding yarn on a bobbin
EP1070676A1 (en) * 1999-07-17 2001-01-24 Schärer Schweiter Mettler AG Method and apparatus for winding a yarn on a bobbin
US20020033428A1 (en) * 2000-01-13 2002-03-21 Reinhard Lieber Method and apparatus for winding a yarn package

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143094B2 (en) * 1972-09-19 1976-11-19
JPS5143095B2 (en) * 1972-10-14 1976-11-19
JPH03243568A (en) * 1990-02-22 1991-10-30 Murata Mach Ltd Traverse device
JPH08217332A (en) * 1995-02-16 1996-08-27 Murata Mach Ltd Yarn traverse device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2072424A5 (en) * 1969-11-26 1971-09-24 Barmag Barmer Maschf Winder traverse motion curved slot guide
DE3825413A1 (en) * 1988-07-27 1990-02-01 Schlafhorst & Co W Method for laying a thread on a cross-wound bobbin
EP0453622A1 (en) * 1990-04-23 1991-10-30 Ssm Schärer Schweiter Mettler Ag Method and apparatus for winding yarn on a bobbin
EP1070676A1 (en) * 1999-07-17 2001-01-24 Schärer Schweiter Mettler AG Method and apparatus for winding a yarn on a bobbin
US20020033428A1 (en) * 2000-01-13 2002-03-21 Reinhard Lieber Method and apparatus for winding a yarn package

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 034 (M-1204), 28 janvier 1992 (1992-01-28) -& JP 03 243568 A (MURATA MACH LTD), 30 octobre 1991 (1991-10-30) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 12, 26 décembre 1996 (1996-12-26) -& JP 08 217332 A (MURATA MACH LTD), 27 août 1996 (1996-08-27) *

Also Published As

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FR2845072A1 (en) 2004-04-02
FR2845072B1 (en) 2005-05-20
AU2003279435A1 (en) 2004-04-19
WO2004028944A3 (en) 2004-05-06

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