EP0512257B1 - Procédé et dispositif pour contrôler la vitesse de rotation des broches d'un métier à retordre - Google Patents

Procédé et dispositif pour contrôler la vitesse de rotation des broches d'un métier à retordre Download PDF

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Publication number
EP0512257B1
EP0512257B1 EP92105843A EP92105843A EP0512257B1 EP 0512257 B1 EP0512257 B1 EP 0512257B1 EP 92105843 A EP92105843 A EP 92105843A EP 92105843 A EP92105843 A EP 92105843A EP 0512257 B1 EP0512257 B1 EP 0512257B1
Authority
EP
European Patent Office
Prior art keywords
rotational speed
spindle
speed
ring
winding
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.)
Expired - Lifetime
Application number
EP92105843A
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German (de)
English (en)
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EP0512257A1 (fr
Inventor
Günter Ing. König
Andreas Dipl.-Ing. Buchholz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Zinser Textilmaschinen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zinser Textilmaschinen GmbH filed Critical Zinser Textilmaschinen GmbH
Publication of EP0512257A1 publication Critical patent/EP0512257A1/fr
Application granted granted Critical
Publication of EP0512257B1 publication Critical patent/EP0512257B1/fr
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Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/28—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association
    • D01H1/30—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association with two or more speeds; with variable-speed arrangements
    • D01H1/305—Speed control of the spindles in response to the displacements of the ring rail

Definitions

  • the invention relates to a method according to the preamble of claim 1
  • the invention has for its object to obtain the most correct, uniform bobbin construction by maintaining a thread tension as constant as possible.
  • This design takes into account the fact that thread balloons are present between the delivery device and the runners rotating on rings, the axial length of which varies depending on the position of the ring bench relative to the delivery device.
  • the axial length of these thread balloons has a considerable influence on the thread tension, which becomes smaller as the axial length of the thread balloons becomes smaller and larger as the axial length increases.
  • An advantageous application of the invention also results in methods and devices in which the endless filaments are "swirled" immediately before being wound up by means of a ring and a runner.
  • the filament threads are passed through nozzles in which they are exposed to the influence of compressed air jets in such a way that the individual capillaries are entwined with themselves and / or with other capillaries.
  • the intermingling the cohesion of the filaments and thus the coherence of the thread becomes increased, some achieved a different type of thread character.
  • the intermingling achieved depends essentially on the tension under which the filaments stand during the intermingling.
  • the thread tension in the interlacing zone should therefore be as uniform as possible.
  • This condition can be met to a large extent with the invention.
  • the aim is to dispense with such a further field and to carry out the intermingling in the twisting or winding zone. In this case, the invention can then be used with advantage.
  • the thread tension in the continuous filament yarn supplied to the bobbin is detected at at least one working position, and that a spindle speed control is carried out to keep the thread tension constant.
  • FIG. 1 shows part of a working position of a draw twisting machine which has a plurality of such working positions on at least one machine side.
  • An endless filament yarn (10) is fed to a spool (14) via a godet (11) provided with a laying roll and a stationary thread guide (12) via a rotor (13).
  • the rotor (13) runs on a ring (15) of a ring bench (16) which is driven in a manner not shown for lifting movements.
  • the lifting movements of the ring bench (16) determine the shape of the coil (14), which will be explained in more detail later with reference to FIGS. 3 to 6.
  • the coil (14) is attached to a spindle (17) which is driven to rotate.
  • each spindle (17) is assigned its own drive motor, the speed of which can be varied.
  • the spindles (17) are assigned a spindle drive system (18) which is only indicated schematically and which contains, for example, a frequency converter for changing the spindle speed.
  • a control and regulating system (19) is assigned to the spindle drive system (18) and specifies the speed to be observed in each case.
  • a spindle speed program is stored in the computer system (19), that is moved during a trigger, ie from the beginning of the winding to the end of the winding of the coil (14). According to this spindle speed program, the spindle speed is gradually reduced during the withdrawal, the course of the spindle speed being determined empirically or mathematically.
  • the spindle speed is corrected or varied in accordance with the measured thread tension.
  • the thread tension is measured while the machine is running according to the lowest godet (11) by means of a transducer (20) which supplies a signal proportional to the thread tension.
  • This signal is fed to a transducer (21) which delivers a signal which can be processed there to the computer system (19).
  • the thread tension is expediently measured by means of several sensors (20) at several working positions, e.g. in five to six working positions. An average value is formed from these measured values so that any short-term fluctuations that can occur as a result of external disturbances are eliminated.
  • the mean value from the thread tension measurements is compared in the computer system (19) with a predetermined target value and its entered tolerance window. If deviations are found, the setpoint of the spindle speed is readjusted and given to the spindle drive system (18).
  • the method used in the embodiment according to FIG. 1 can be implemented for all types of windings that are suitable for the construction of the coil (14). In the simplest form, a spindle speed program can also be dispensed with. In most cases, however, it will be expedient to superimpose the speed variations on a basic speed specified by a control program.
  • the sensor (s) (20) attack the continuous filament yarn (10) in the area between the godet (11) and the thread guide (12).
  • the transducers (20) aimed directly at the balloon between the thread guide (12) and the runner (13).
  • other arrangements of transducers can also be used.
  • the spindles (17) are controlled by a spindle drive system (18), to which a computer system (19) is assigned.
  • a spindle speed program is stored in the computer system (19) and is run during the build-up of the coil, the spindle speed being reduced as the winding diameter of the coils (14) increases.
  • the ring bank (16) is assigned an encoder (23) which is designed as an incremental encoder or absolute encoder and which measures the current ring bank position.
  • the spindle speed setpoint is changed in the computer system (19) in accordance with the measured position of the ring rail and specified for the spindle drive system (18).
  • the position of the ring bench (16) and the direction of movement of the ring bench (16) are determined incrementally, analogously or absolutely.
  • the determined value is evaluated in the digital computer system (19), which specifies a corresponding target value for a speed controller of the spindle drive system.
  • delivery devices in the form of a godet (11)
  • other delivery devices can of course also be provided, for example also delivery spools from which the continuous filament is unwound.
  • Fig. 4 the course of the lifting movement of the ring rail is shown schematically, with which a Kötzerwickel is generated.
  • the stroke of the ring bench (H) remains essentially the same throughout the coil build-up. It begins at the lower reversal point and is then steadily raised in level, so that an upper embankment area (B1) and a lower embankment area (B2) arise. With this type of winding, the ring rail moves into the upper embankment area (B 1), in which case the wind diameter is reduced due to the embankment. Deviations from this construction are possible, the lifting height being varied during the construction of the coil.
  • FIG. 5 shows the structure of a so-called combination winding.
  • the lower reversal point of the ring rail is moved upwards during the construction of the cop, so that a lower slope (B2) is generated.
  • the stroke (H) of the ring rail (16) is varied during the build-up of the coil, so that an upper embankment area (B 1) is also produced, which is operated by the ring rail (6).
  • Fig. 6 the principle of a composite winding is shown, in which the ring bank carries out a lifting movement of the same size during the entire coil build-up, but the upper and lower reversal point are periodically shifted up and down again, so that here too an upper slope (B1) and a lower slope (B2) with a central, substantially cylindrical section.
  • the ring bench (16) also moves in the area of the lower embankment (B2).
  • the spindle speed program specifies a basic speed (n g ) which is based on the wind-up diameter the coil (14) is dependent on the relevant time of the coil construction.
  • the influence of the thread balloons formed between the thread guide (12) and the rotor (13) on the thread tension has not yet been taken into account in this basic speed (n g ).
  • This influence is taken into account by means of the device shown in FIG. 1 or FIG. 2 by varying the basic speed (n g ) in order to keep the thread tension constant (taking into account an allowable tolerance). 7 is based on the fact that the device according to FIG. 2 is used.
  • a variation value in the form of a curve (25) is defined in the computer system (19), on the basis of which the basic speed (n g ) is varied in accordance with the height position of the spindle bank (16), so that the spindle speed (n s ) is controlled.
  • the curve (25) is defined so that with a reduction in the axial length of the thread balloon, ie the axial distance between the delivery device (godet 11) and rotor (13), the spindle speed (n) is increased and vice versa in order to keep the thread tension constant .
  • the curve (25) of the variation values need not have a linear course.
  • the variation curves (25) can form a parallel family of curves in the course of the coil build-up, ie with increasing wind diameter and thus reduced basic speed (n g ).
  • the spindle speed is increased compared to the basic speed (n g ) specified by the spindle speed program when winding in this area. It is necessary in the area of the upper embankment (B1) to increase the speed more than in the area of the lower embankment (B2), since here the influence of the correspondingly enlarged or reduced thread balloon is added.
  • correction programs also stored in the computer system then determine that when entering the embankment areas (B1, B2) a corresponding speed increase and a corresponding speed reduction take place after reaching the upper or lower reversal point, until again the basic speed (n g ) assigned to the winding diameter of the central region of the coil (14) has been reached.
  • the spindle speed control program for the winding diameter there is varied in accordance with the axial length of the thread balloon.
  • the spindle speed control program for the winding diameter there is varied in accordance with the axial length of the thread balloon.
  • the spindle speed control program for the winding diameter there is varied in accordance with the axial length of the thread balloon.
  • the course of the curve according to FIG. 11a can also be approximated by a curve composed of only two linear sections.
  • the specified tolerance fields are then not left.
  • it is also possible to store other curve shapes for the variation values in the computer system for example convex or concave curved shapes.
  • the curve shape depends on the material to be processed and in particular also on the type of drive of the ring bench (16), i.e. after the course of the ring bench speed, for example accelerations before the reversal points or acceleration over the entire stroke.
  • the diagram of FIG. 12 shows the course of the spindle speed (n) over the coil structure, ie over time (T).
  • the spindle speed control program defines basic speeds (n g1 , n g2 .... n gn ) with which the speed is gradually reduced over time, the steps being 50 min ⁇ 1, for example.
  • This basic speed (n g ) depends on the directly measured thread tension or the height position of the Ring bank (16) changed by the variation value ( ⁇ n) during each stroke of the ring bank (16). It should be mentioned once again that these variations are shown in a highly schematic manner and that in reality the stroke-dependent speed curve can deviate significantly from a linear straight line.
  • a non-constant ring bench speed for example with acceleration before the turning points and / or acceleration over the entire stroke, can already lead to deviations.
  • a spindle speed variation in the embankment areas (B1, B2) by a combination there in order to keep the thread tension as constant as possible both variation measures is carried out.
  • time (t 1) which represents the beginning of the upper slope area (B 1)
  • the spindle speed is increased more than in the cylindrical area.
  • time (t2) which represents the reversal point of the ring bank above
  • the spindle speed is reduced again until it reaches the end of the upper slope area (B1) at time (t3).
  • time (t4) i.e.
  • the spindle speed is not reduced further, but slightly increased. From time (t5), which represents the lower turning point of the ring bank, the speed is reduced again until time (t6) the end of the lower embankment area (B2) is reached and the spindle speed is increased again.
  • the variation to take account of the embankment areas (B1, B2) is thus superimposed on the variation to take account of the axial length of the thread balloon.

Claims (3)

  1. Procédé pour modifier la vitesse de rotation de broches (17) d'un métier à retordre ayant plusieurs postes de travail, qui présentent à chaque fois un dispositif délivreur tournant essentiellement à vitesse constante pour délivrer un filament sans fin (10) monofilaire ou multifilaire, un arrangement de curseur-anneau (13, 15) avec une plate-bande porte-anneaux (16) effectuant des mouvements de levage et avec une broche (17) ayant une commande (18) pouvant modifier la vitesse de rotation, renvidant le filament sans fin (10) sur une bobine (14), les mouvements de levage de la plate-bande porte-anneaux (16) étant contrôlés de telle sorte que le plan de renvidage au cours de la levée, soit conduit de manière répétée dans au moins l'une des zones de flancs existantes (B₁, B₂) d'enroulage de la bobine, la vitesse de rotation des broches étant diminuée progressivement avec l'augmentation moyenne du diamètre de renvidage de la bobine, caractérisé en ce que la vitesse de rotation des broches (17) est diminuée pendant chaque mouvement de levage de la plate-bande porte-anneaux quand l'intervalle entre le dispositif délivreur et l'arrangement de curseur-anneau (13, 15) augmente, et est augmentée quand l'intervalle devient plus petit et en ce que la vitesse de rotation des broches (17) est augmentée lors du décalage du plan de renvidage dans les zones de flancs (B₁, B₂) pour un diamètre de renvidage devenant plus petit, et est diminuée pour un diamètre de renvidage devenant plus grand.
  2. Procédé selon la revendication 1, caractérisé en ce que la tension du fil dans le filament sans fin (10) délivré aux bobines (14) est détectée à au moins un poste de travail, et en ce qu'un réglage de la vitesse de rotation des broches est effectué pour maintenir constante la tension du fil.
  3. Procédé selon la revendication 1, caractérisé en ce que l'on détecte le diamètre de renvidage croissant des bobines et la position en hauteur de la plate-bande porte-anneaux, et qu'en fonction de cela, une valeur prescrite prédéterminée de la vitesse de rotation des broches est sélectionnée.
EP92105843A 1991-05-09 1992-04-04 Procédé et dispositif pour contrôler la vitesse de rotation des broches d'un métier à retordre Expired - Lifetime EP0512257B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4115186 1991-05-09
DE4115186A DE4115186A1 (de) 1991-05-09 1991-05-09 Verfahren und vorrichtung zum veraendern der drehzahl der spindeln einer zwirnmaschine

Publications (2)

Publication Number Publication Date
EP0512257A1 EP0512257A1 (fr) 1992-11-11
EP0512257B1 true EP0512257B1 (fr) 1995-10-18

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EP92105843A Expired - Lifetime EP0512257B1 (fr) 1991-05-09 1992-04-04 Procédé et dispositif pour contrôler la vitesse de rotation des broches d'un métier à retordre

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EP (1) EP0512257B1 (fr)
JP (1) JPH05230723A (fr)
DE (2) DE4115186A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19713959C2 (de) * 1997-04-04 1999-05-12 Zinser Textilmaschinen Gmbh Verfahren zum Herstellen verschiedener Wicklungsarten, insbesondere einer Flyer- oder Verbundwicklung
JP3822112B2 (ja) * 2002-02-19 2006-09-13 三菱レイヨン株式会社 乾式紡糸繊維の巻き取り方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1160343B (de) * 1959-09-12 1963-12-27 Marelli & C Spa Ercole Vorrichtung zum Veraendern der Drehzahl des Antriebsmotors einer Ringspinnmaschine
DE1273389B (de) * 1963-01-30 1968-07-18 Zinser Textilmaschinen Gmbh Streckzwirnmaschine
US3377793A (en) * 1965-01-04 1968-04-16 Tmm Research Ltd Ring spinning and twisting machine and process
CH433929A (fr) * 1966-04-14 1967-04-15 Mefina Sa Machine à coudre
DD255174A1 (de) * 1986-12-19 1988-03-23 Textima Veb K Schaltungsanordnung zum steuern und/oder regeln der spindeldrehzahl an ringspinn- oder ringzwirnmaschinen
EP0368608A1 (fr) * 1988-11-08 1990-05-16 Hiroshi Yamaguchi Dispositif de filage à panneau équipé d'un moteur d'anneau et méthode pour contrôler l'opération de filage dudit dispositif

Also Published As

Publication number Publication date
DE4115186A1 (de) 1992-11-19
JPH05230723A (ja) 1993-09-07
DE59204030D1 (de) 1995-11-23
DE4115186C2 (fr) 1993-04-08
EP0512257A1 (fr) 1992-11-11

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