EP0664765A1 - Method of winding a yarn on to a cross-wound bobbin - Google Patents

Method of winding a yarn on to a cross-wound bobbin

Info

Publication number
EP0664765A1
EP0664765A1 EP94922224A EP94922224A EP0664765A1 EP 0664765 A1 EP0664765 A1 EP 0664765A1 EP 94922224 A EP94922224 A EP 94922224A EP 94922224 A EP94922224 A EP 94922224A EP 0664765 A1 EP0664765 A1 EP 0664765A1
Authority
EP
European Patent Office
Prior art keywords
winding
thread
traversing
speed
bobbin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94922224A
Other languages
German (de)
French (fr)
Other versions
EP0664765B1 (en
Inventor
Dieter Haak
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 Barmag AG
Original Assignee
Barmag AG
Barmag Barmer Maschinenfabrik AG
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
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Application filed by Barmag AG, Barmag Barmer Maschinenfabrik AG filed Critical Barmag AG
Publication of EP0664765A1 publication Critical patent/EP0664765A1/en
Application granted granted Critical
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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
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B65H59/385—Regulating winding speed
    • 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 a method for winding a thread into a cheese in a wild winding.
  • the lay-off angle and the cross-over ratio, as well as the course of the thread tension during the winding process are essential factors for the stability of the winding, the avoidance of mirror formation and the good workability of the winding during further processing and transport .
  • the general aim is to avoid deviations from settings which are favorable according to experience, in particular also when suppressing mirror formation.
  • the thread pulling force prevailing in the thread during the winding process generally also increases in an undesirable manner as the winding diameter increases, unless measures are taken to counteract an increase in the thread tension.
  • the back and forth movement of the thread on the bobbin surface takes place at a constant traversing frequency during the bobbin travel, which leads to constant bobbin winding on the bobbin surface with essentially constant thread delivery.
  • the wild winding is differentiated in particular from the precision winding, in which the winding spindle drive and the traversing drive mechanically or
  • REPLACEMENT LEAF is electronically in a fixed, non-integer ratio and the deposit angle decreases continuously with increasing coil diameter.
  • a thread tension transducer and a rotating pulsation device controlled as a function of the traversing speed are provided between the thread delivery godet and the input of the traversing.
  • the pulsation device should essentially compensate for the thread tension fluctuations caused by the chanting by deflecting the thread out of its straight run in both directions synchronously with the traversing.
  • the thread tension transducer provided in the thread run in front of the pulsation device is intended, in particular, to convert thread tension force changes caused by the increase in the bobbin diameter into control pulses for influencing the spindle speed in such a way that an increasing thread tension force is counteracted by lowering the spindle speed and vice versa.
  • the invention is based on the task of guiding the thread tensile force without influencing the crossing ratio and the laying angle. This object is solved by claim 1.
  • the winding ratio or the K value which are defined by the ratio of winding spindle speed and traversing frequency - as the number of double strokes - remains unchanged when the thread tension and thus the winding spindle speed change.
  • such a traversing program contains a constantly predetermined traversing speed.
  • a constantly predetermined traversing speed can also be used as a constantly predetermined traversing speed.
  • the traversing speed does not remain constant, but is changed between an upper limit and a lower limit according to a predetermined law, the upper limit and the lower limit also changing during the winding of a package (winding travel).
  • Critical winding-up situations are basically those in which the traversing frequency and the spindle speed form an integer or an integer fractional ratio. These events are called “mirror formation”.
  • the so-called “mirror” not only represents a considerable disturbance of the bobbin structure, but can also lead to the interruption of the winding process and to the destruction of the dishwasher due to out-of-roundness.
  • the invention avoids such unpredictable winding conditions.
  • a tolerance range is advantageously specified for the course of the thread tensile force, which can be determined, for example, by targeted tests or by empirical values from production. In particular, it should cover the inevitable short-term fluctuations resulting from the traversing.
  • the nominal value of the thread tension can also be determined and specified as a long-term value by averaging in experiments.
  • the winding-up method according to the invention can be used with advantage both in a winding-up machine in which the bobbin is driven by a drive roller on the circumference of the bobbin driven at a constant speed, and in a bobbin-winding machine which has an axle drive motor for the winding spindle which is controlled by a sensing roller.
  • FIG. 1 shows a diagram of a winding unit equipped according to the invention with a directly driven winding spindle;
  • Fig. 2 functional diagram of a winding unit with the drive
  • FIG. 3 functional diagram of a winding unit with direct drive of the winding spindle.
  • Fig. 1 shows the construction diagram of a winding unit equipped for carrying out the winding method according to the invention, in which the thread 1 is wound up to a cross-wound bobbin 4 by a winding spindle 5 with sensing roller 24 and direct drive 6.
  • the drive shaft 7 of the oscillation 3 also has its own drive 8. Both drives 6, 8 are guided by a control unit 9 via converters 30 and supply lines 28, 29. Instead of being driven directly by the motor 6, it is alternatively also known and customary to drive the cross-wound bobbin 4 on its periphery by a drive roller driven at a constant peripheral speed.
  • the control unit 9 has the task of coordinating the drives 6, 8 with one another in a mutual dependency such that the crossing ratio and the laying angle correspond to those for the entire
  • REPLACEMENT LEAF predetermined winding of the setpoint values can be kept in agreement.
  • a thread tension force transducer 2 is provided, which is connected via a signal line and a D / A converter (digital-analog / converter), not shown for better clarity, transmits the course of the measured thread tension (signal 23) to the control unit 9.
  • the signals coming from the thread tension sensor 2 in the control unit 9 modify the predetermined setpoints for guiding the drives 6, 8 in such a way that the change in the spindle speed required to compensate for thread tension deviations is accompanied by a change in the traversing speed in such a way that that the predetermined course of the crossing ratio and the laying angle remains unchanged.
  • FIGS. 2 and 3 correspond in substantial parts and are therefore provided with the same reference numerals for the comparable units.
  • the generators 11, 12 generate the respective basic frequencies for the bobbin drive and the chaning drive, which are supplied to the bobbin head control 14 belonging to the control unit 9, in accordance with the desired values 18, 19 specified by the winding program.
  • a disturbance generator 13 is provided, which is used to generate the signals to be given to the setpoint 18 of the oscillation for the intended disturbance method (e.g. wobble) serves to suppress the mirror image.
  • a spindle drive control 17 is also provided in the line leading from the fundamental frequency generator 12 to the connection S of the winding head control 14.
  • the winding head control 14 receives the continuously determined actual values, namely 21 the traverse 3 (double stroke rate, traversing frequency), 22 the winding spindle speed and 23 the thread tension, and in the embodiment according to FIG. 3 also the bobbin circumferential speed determined by the feeler roller 24 (signal 25 ).
  • the actual values arrive in a unit 16 belonging to the control unit 9 for actual value detection, the actual value signal 23 of the thread tension being passed on to a control unit 15 for the thread tension.
  • the correction signals generated in the control unit 15 pass via the line 26 to the connection S (winding spindle) of the control 14 and via the line 27 to the interference generator 13 and from there together with the interference signals to the connection CH of the winding head control 14 the controller 14 modifies the signals generated by the fundamental frequency generators 11, 12 by multiplicative evaluation with the same evaluation factor as a function of the thread tension.
  • a regulation 17 for the winding spindle drive is provided.
  • the signals coming from the actual value detection 16 and belonging to the actual values 22 (winding spindle speed) and 25 (sensing roller) are fed into the control 17, the actual value signal 22 of the winding spindle speed also arrives just like the actual value Signal 21 of the traversal to the interference generator 13.
  • the power supplied to the drives 6, 8 via the converter 30 is modified in the winding head control 14 in such a way that the actual value profile of the thread tension is adapted to the target value profile without disturbing the predetermined crossing ratio and the laying angle.
  • the method for controlling the drives 6, 8 of a winding spindle 5 and the traversing mechanism 3 assigned to them can also be applied to a winding device with a plurality of winding spindles arranged on a spindle turret, wherein the winding spindles can also be driven either by a direct drive 5 according to FIG. 3 or a friction roller drive according to FIG. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

Described is a method of winding a yarn (1), fed at constant speed by a feed mechanism, on to a cross-wound bobbin (4). The method calls for the drives (6, 8) for the bobbin spindle (5) and for the cross-winding device (3) to be controlled by frequency converters (30) controlled in turn by a bobbin control unit (14). In addition, the change in rpm as the bobbin diameter increases is controlled by a yarn-tension sensor (2). The correction of the frequencies of the power supply to the drives (6, 8) is carried out in such a way that a prescribed angle is maintained for the yarn being wound on to the bobbin (4) and the variation in yarn tension follows a prescribed pattern.

Description

Verfahren zum Aufwickeln eines Fadens zu einer Kreuzspule Method of winding a thread into a package
Die Erfindung betrifft ein Verfahren zum Aufwickeln eines Fadens zu einer Kreuzspule in wilder Wicklung.The invention relates to a method for winding a thread into a cheese in a wild winding.
Ein derartiges Aufwickelverfahren ist beispielsweise durch die US-PS 4,245,794 bekannt.Such a winding process is known, for example, from US Pat. No. 4,245,794.
Bei der Fadenaufwicklung zu Kreuzspulen sind insbesondere bei hohen AufWickelgeschwindigkeiten der Ablegewinkel und das Kreu¬ zungsverhältnis ebenso wie der Fadenzugkraftverlauf während des AufWickelvorgangs für die Stabilität des Wickels, die Vermeidung von Spiegelbildung sowie die gute Abarbeitbarkeit des Wickels bei der Weiterverarbeitung und den Transport wesentliche Fak¬ toren. Daher wird allgemein angestrebt, Abweichungen von erfah¬ rungsgemäß günstigen Einstellungen, insbesondere auch bei der Unterdrückung einer Spiegelbildung, nach Möglichkeit zu ver¬ meiden. Andererseits ist bekannt, daß die während des Aufwickel¬ vorgangs im Faden herrschende Fadenzugkraft mit steigendem Wick¬ eldurchmesser in der Regel in meist unerwünschter Weise eben¬ falls ansteigt, sofern nicht Maßnahmen getroffen werden, die einem Anstieg der Fadenspannung entgegenwirken.When winding the thread into packages, in particular at high winding speeds, the lay-off angle and the cross-over ratio, as well as the course of the thread tension during the winding process, are essential factors for the stability of the winding, the avoidance of mirror formation and the good workability of the winding during further processing and transport . For this reason, the general aim is to avoid deviations from settings which are favorable according to experience, in particular also when suppressing mirror formation. On the other hand, it is known that the thread pulling force prevailing in the thread during the winding process generally also increases in an undesirable manner as the winding diameter increases, unless measures are taken to counteract an increase in the thread tension.
Bei einer wilden Wicklung läuft die Hin-und Herverlegung des Fadens auf der Spulenoberfläche während der Spulreise im wesent¬ lichen mit konstanter Changierfrequenz ab, was bei im wesentli¬ chen konstanter Fadenlieferung zu konstanten Fadeenablegewickeln auf der Spulenoberfläche führt. Die wilde Wicklung wird dabei insbesondere von der Präzisionswicklung unterschieden, bei der der Spulspindelantrieb und der Changierantrieb mechanisch oderIn the case of a wild winding, the back and forth movement of the thread on the bobbin surface takes place at a constant traversing frequency during the bobbin travel, which leads to constant bobbin winding on the bobbin surface with essentially constant thread delivery. The wild winding is differentiated in particular from the precision winding, in which the winding spindle drive and the traversing drive mechanically or
ERSATZBLATT elektronisch in einem fest vorgegebenem, nicht ganzzahligen Verhältnis steht und der Ablegewinkel mit steigendem Spulen¬ durchmesser stetig abnimmt.REPLACEMENT LEAF is electronically in a fixed, non-integer ratio and the deposit angle decreases continuously with increasing coil diameter.
Maßnahmen zur Beeinflussung des Fadenzugkraftverlaufs während des AufwickelVorgangs sind im Stand der Technik, beispielsweise durch die eingangs genannte US-PS 4,245,794, bekannt.Measures to influence the course of the thread tension during the winding-up process are known in the prior art, for example by the aforementioned US Pat. No. 4,245,794.
Bei dem in dieser Patentschrift beschriebenen Verfahren ist zwischen Fadenliefergalette und Eingang der Changierung ein Fadenzugkraft-Wandler und eine umlaufende, in Abhängigkeit von der Changiergeschwindigkeit gesteuerte Pulsationsvorrichtung vorgesehen. Nach dem auf der Vorrichtung auszuführenden Aufwik- kelverfahren soll die Pulsationsvorrichtung die durch die Chan¬ gierung verursachten Fadenzugkraftschwankungen im wesentlichen dadurch ausgleichen, daß durch sie der Faden synchron mit der Changierung aus seinem geraden Lauf nach beiden Seiten aus- gelenkt wird. Durch den im Fadenlauf vor der Pulsationsvorrich¬ tung vorgesehenen Fadenzugkraft-Wandler sollen insbesondere durch das Anwachsen des Spulendurchmessers verursachte Faden¬ zugkraftänderungen in Steuerimpulse zur Beeinflussung der Spin¬ deldrehzahl derart umgewandelt werden, daß einer ansteigenden Fadenzugkraft durch das Absenken der Spindeldrehzahl entgegen¬ gewirkt wird und umgekehrt.In the method described in this patent, a thread tension transducer and a rotating pulsation device controlled as a function of the traversing speed are provided between the thread delivery godet and the input of the traversing. After the winding-up process to be carried out on the device, the pulsation device should essentially compensate for the thread tension fluctuations caused by the chanting by deflecting the thread out of its straight run in both directions synchronously with the traversing. The thread tension transducer provided in the thread run in front of the pulsation device is intended, in particular, to convert thread tension force changes caused by the increase in the bobbin diameter into control pulses for influencing the spindle speed in such a way that an increasing thread tension force is counteracted by lowering the spindle speed and vice versa.
Dies führt jedoch dazu, daß in Abhängigkeit von dem Fadenzug¬ kraftverlauf auch der Ablegewinkel und das Kreuzungsverhältnis in nicht vorhersehbarer, unerwünschter Weise verändert werden.However, this leads to the fact that, depending on the course of the thread tension, the laying angle and the crossing ratio are changed in an unforeseeable, undesirable manner.
Der Erfindung liegt die Aufgabe zugrunde, die Führung der Fa¬ denzugkraft ohne Beeinflussung von Kreuzungsverhältnis und Ab¬ legewinkel vorzunehmen. Diese Aufgabe wird durch den Anspruch 1 gelöst.The invention is based on the task of guiding the thread tensile force without influencing the crossing ratio and the laying angle. This object is solved by claim 1.
Aus der US-PS 4,394,986 ist es zwar bekannt, bei einem kontinu-From US Pat. No. 4,394,986 it is known to use a continuous
ERSATZBLATT ierlichen Aufwickelverfahren mit mehreren Spulspindeln die im Wechsel nacheinander in Betrieb genommen werden, sowohl den Antriebsmotor für die Spulspindel als auch den Antriebsmotor für die Changiereinrichtung mit einem aus der Fadenzugkraftmessung gewonnenen, elektrischen Korrektursignal zu beaufschlagen. Hierzu sei jedoch bemerkt, daß dies nur in der Wechselphase der Spannfutter und zum Beschleunigen der Leerhülse erfolgt. Während der gesamten Spulreise wäre es nachteilig, weil bei gleichzeiti¬ ger Herabsetzung der Drehzahl von Spulspindel und Changierfre¬ quenz in demselben Verhältnis beim Anwachsen des Spulendurchmes¬ sers der Ablegewinkel stetig verändert wird, was Nachteile für den Spulenaufbau hat.REPLACEMENT LEAF The winding process with several winding spindles, which are put into operation one after the other, to apply an electrical correction signal obtained from the thread tension measurement to both the drive motor for the winding spindle and the drive motor for the traversing device. However, it should be noted that this only takes place in the change phase of the chuck and to accelerate the empty sleeve. During the entire winding cycle it would be disadvantageous because, with simultaneous reduction in the rotational speed of the winding spindle and traversing frequency in the same ratio as the diameter of the winding increases, the lay-off angle is continuously changed, which has disadvantages for the winding structure.
Demgegenüber bleibt bei dem Verfahren gemäß der Erfindung das Spulverhältnis oder der K-Wert, die durch das Verhältnis aus Spulspindeldrehzahl und Changierfrequenz - als Anzahl von Dop¬ pelhüben - definiert sind, unverändert, wenn die Fadenspannung und damit die Spulspindeldrehzahl sich ändern.In contrast, in the method according to the invention, the winding ratio or the K value, which are defined by the ratio of winding spindle speed and traversing frequency - as the number of double strokes - remains unchanged when the thread tension and thus the winding spindle speed change.
Damit wird verhindert, daß die Fadenspannung und die Steuerung der Spulspindeldrehzahl in die Steuerung des Changierprogramms eingreift. Das ist insbesondere von Vorteil bei Changierprogram¬ men, welche durch den Verlauf des Spulverhältnisses vorgegeben sind, z.B. nach EP-0093258 B bzw. UΞ-4,504,024 A oder EP-0195325 B bzw. US-4,697,753 A. Bei dem ersteren (EP-0093258 B) wird das Changiergesetz in Abhängigkeit von dem Auftreten bestimmter, kritischer Spulverhältnisse derart gesteuert, daß die Changier¬ geschwindigkeit bzw. Changierfrequenz bei Annäherung an eines dieser Verhältnisse auf den jeweils anderen von zwei Werten umgeschaltet wird. Bei dem zweiten Changierprogramm (EP 0195325 B) folgt die Changiergeschwindigkeit einem fest vorgegebenen Programm.This prevents the thread tension and the control of the winding spindle speed from interfering with the control of the traversing program. This is particularly advantageous in the case of traversing programs which are predetermined by the course of the winding ratio, e.g. according to EP-0093258 B or UΞ-4,504,024 A or EP-0195325 B or US-4,697,753 A. In the former (EP-0093258 B) the traversing law is controlled in dependence on the occurrence of certain critical winding conditions such that the traversing ¬ speed or traversing frequency when approaching one of these ratios to the other of two values is switched. In the second traversing program (EP 0195325 B), the traversing speed follows a predefined program.
Im einfachsten Fall beinhaltet ein solches Changierprogramm eine konstant vorgegebene Changiergeschwindigkeit. Einer solchen konstant vorgegebenen Changiergeschwindigkeit können auchIn the simplest case, such a traversing program contains a constantly predetermined traversing speed. Such a constantly predetermined traversing speed can also
ERSATZBLATT Schwankungen überlagert werden (Wobbelung). Bei dem bekannten Verfahren bleibt die Changiergeschwindigkeit nicht konstant, sondern wird zwischen einer Obergrenze und einer Untergrenze nach einer vorgegebenen Gesetzmäßigkeit verändert, wobei auch die Obergrenze und die Untergrenze sich während des Aufwickeins einer Kreuzspule (Spulreise) ändern.REPLACEMENT LEAF Fluctuations are superimposed (wobble). In the known method, the traversing speed does not remain constant, but is changed between an upper limit and a lower limit according to a predetermined law, the upper limit and the lower limit also changing during the winding of a package (winding travel).
Die Erfahrung zeigt bei beiden Verfahrensvarianten, daß es nicht möglich ist, jede kritische Aufspulsituation zu vermeiden. Grundsätzlich sind kritische Aufspulsituationen solche, bei denen die Changierfrequenz und die Spindeldrehzahl ein ganzzah¬ liges oder ein ganzzahliges gebrochenes Verhältnis bilden. Man bezeichnet diese Ereignisse als "Spiegelbildung". Der sog. "Spiegel" stellt nicht nur eine erhebliche Störung des Spulen¬ aufbaues dar, sondern kann auch zur Unterbrechung des Spulpro¬ zesses und zur Zerstörung der AufSpülmaschine durch auftretende Unrundheiten führen.Experience shows with both process variants that it is not possible to avoid every critical winding situation. Critical winding-up situations are basically those in which the traversing frequency and the spindle speed form an integer or an integer fractional ratio. These events are called "mirror formation". The so-called "mirror" not only represents a considerable disturbance of the bobbin structure, but can also lead to the interruption of the winding process and to the destruction of the dishwasher due to out-of-roundness.
Es zeigt sich jedoch, daß auch bei nicht ganzzahligem Spulver¬ hältnis oder bei Spulverhältnissen, die nicht durch eine kleine ganze Zahl (2, 3, 4 ...) gebrochen sind, noch Spiegelsituationen oder spiegelähnliche Situationen auftreten können. Diese Situa¬ tionen sind z. T. prozeßabhängig und nicht vorhersehbar.It turns out, however, that mirror situations or mirror-like situations can still occur even if the winding ratio is not an integer or if the winding ratios are not broken by a small whole number (2, 3, 4 ...). These situations are e.g. T. process-dependent and unpredictable.
Durch die Erfindung werden derartige, nicht vorhersehbare Auf- spulverhältnisse vermieden.The invention avoids such unpredictable winding conditions.
Vorteilhaft wird für den Verlauf der Fadenzugkraft eine Tole¬ ranzbreite vorgegeben, die beispielsweise durch gezielte Ver¬ suche oder durch Erfahrungswerte aus der Produktion festgelegt werden kann. Insbesondere soll sie die aus der Changierung stam¬ menden, unvermeidlichen kurzzeitigen Schwankungen abdecken.A tolerance range is advantageously specified for the course of the thread tensile force, which can be determined, for example, by targeted tests or by empirical values from production. In particular, it should cover the inevitable short-term fluctuations resulting from the traversing.
Der Sollwert der Fadenzugkraft kann auch als Langzeitwert durch Mittelwertbildung in Versuchen ermittelt und vorgegeben werden.The nominal value of the thread tension can also be determined and specified as a long-term value by averaging in experiments.
ERSATZBLATT Das Aufspulverfahren gemäß der Erfindung ist sowohl bei einer AufSpülmaschine mit Vorteil anwendbar, bei der der Spulenantrieb durch eine mit konstanter Drehzahl angetriebene Treibwalze am Spulenumfang erfolgt als auch bei einer AufSpülmaschine, die einen durch eine Tastwalze gesteuerten Achsantriebsmotor für die Spulspindel aufweist.REPLACEMENT LEAF The winding-up method according to the invention can be used with advantage both in a winding-up machine in which the bobbin is driven by a drive roller on the circumference of the bobbin driven at a constant speed, and in a bobbin-winding machine which has an axle drive motor for the winding spindle which is controlled by a sensing roller.
Anhand der in der beigegebenen Zeichnung dargestellten Beispiele einer Vorrichtung zur Durchführung des erfindungsgemäßen Verfah¬ rens wird die Erfindung erläutert.The invention is explained on the basis of the examples of a device for carrying out the method according to the invention, which are shown in the attached drawing.
Es zeigen:Show it:
Fig. 1 Schema einer erfindungsgemäß ausgestatteten Spulstelle mit direkt angetriebener Spulspindel; Fig. 2 Funktionsschaubild einer Spulstelle mit Antrieb der1 shows a diagram of a winding unit equipped according to the invention with a directly driven winding spindle; Fig. 2 functional diagram of a winding unit with the drive
Spulspindel durch eine Treibwalze; Fig. 3 Funktionsschaubild einer Spulstelle mit Direktantrieb der Spulspindel.Winding spindle through a drive roller; Fig. 3 functional diagram of a winding unit with direct drive of the winding spindle.
Die Fig. 1 zeigt das Aufbauschema einer zur Durchführung des erfindungsgemäßenAufWickelverfahrens ausgestatteten Spulstelle, bei der der Faden 1 durch eine Spulspindel 5 mit Tastwalze 24 und Direktantrieb 6 zu einer Kreuzspule 4 aufgewickelt wird. Auch die Antriebswelle 7 der Changierung 3 hat einen eigenen Antrieb 8. Beide Antriebe 6, 8 werden über Umrichter 30 und Versorgungsleitungen 28, 29 durch eine Regeleinheit 9 geführt. Anstatt durch den Motor 6 direkt angetrieben zu werden, ist es alternativ auch bekannt und üblich, die Kreuzspule 4 an ihrem Umfang durch eine mit konstanter Umfangsgeschwindigkeit ange¬ triebene Treibwalze anzutreiben.Fig. 1 shows the construction diagram of a winding unit equipped for carrying out the winding method according to the invention, in which the thread 1 is wound up to a cross-wound bobbin 4 by a winding spindle 5 with sensing roller 24 and direct drive 6. The drive shaft 7 of the oscillation 3 also has its own drive 8. Both drives 6, 8 are guided by a control unit 9 via converters 30 and supply lines 28, 29. Instead of being driven directly by the motor 6, it is alternatively also known and customary to drive the cross-wound bobbin 4 on its periphery by a drive roller driven at a constant peripheral speed.
Die Regeleinheit 9 hat die Aufgabe, die Antriebe 6, 8 in gegen¬ seitiger Abhängigkeit derart aufeinander abzustimmen, daß das Kreuzungsverhältnis und der Ablegewinkel mit den für den gesa -The control unit 9 has the task of coordinating the drives 6, 8 with one another in a mutual dependency such that the crossing ratio and the laying angle correspond to those for the entire
ERSATZBLATT ten Aufwickelvorgang vorgegebenen Sollwerteverläufen in Überein¬ stimmung gehalten werden. Hierzu werden die Soll- und Istwerte sowie die Frequenzen für den Spindelantrieb 6 (Frequenzgenerator 19) und den Antrieb 8 der Changierung 3 (Frequenzgenerator 18), die Ist-Drehzahl 22 der Spulspindel 5 bzw. die Doppelhubzahl der Changierung 3 (Drehzahl 21 der Antriebswelle 7), der Verlauf der Fadenzugkraft (Sollwert 20, Istwert 23) und - bei Direktantrieb der Spulspindel 5 - die durch Tastwalze 24 ermittelte Umfangs¬ geschwindigkeit 25 der Spule 4 in die Regeleinheit 9 eingegeben.REPLACEMENT LEAF predetermined winding of the setpoint values can be kept in agreement. For this purpose, the setpoints and actual values as well as the frequencies for the spindle drive 6 (frequency generator 19) and the drive 8 of the oscillation 3 (frequency generator 18), the actual rotational speed 22 of the winding spindle 5 and the double stroke number of the oscillation 3 (rotational speed 21 of the drive shaft) 7), the course of the thread tension (setpoint 20, actual value 23) and - in the case of direct drive of the winding spindle 5 - the peripheral speed 25 of the bobbin 4 determined by the feeler roller 24 is input into the control unit 9.
Zwischen einem nicht näher dargestellten, mit konstanter Ge¬ schwindigkeit angetriebenen Lieferwerk, beispielsweise einer vom Faden umschlungenen Galette und dem den Eingang des Changier¬ dreiecks bildenden Kopffadenführer 10 ist ein am Faden 1 anlie¬ gender Fadenzugkraftaufnehmer 2 vorgesehen, der über eine Sig¬ nalleitung und einen wegen der besseren Übersichtlichkeit nicht dargestellten D/A-Wandler (Digital-Analog/Wandler) den Verlauf der gemessenen Fadenzugkraft (Signal 23) an die Regeleinheit 9 übermittelt. Durch die von dem Fadenspannungsaufnehmer 2 kom¬ menden Signale werden in der Regeleinheit 9 die vorgegebenen Sollwerte für die Führung der Antriebe 6, 8 derart modifiziert, daß mit der zur Kompensation von Fadenspannungsabweichungen erforderlichen Veränderung der Spindeldrehzahl auch eine Ände¬ rung der Changiergeschwindigkeit einhergeht derart, daß der vorgegebene Verlauf von Kreuzungsverhältnis und Ablegewinkel unverändert erhalten bleibt.Between a feed mechanism (not shown in detail, driven at constant speed), for example a godet wrapped in the thread, and the head thread guide 10 forming the entrance of the traversing triangle, a thread tension force transducer 2 is provided, which is connected via a signal line and a D / A converter (digital-analog / converter), not shown for better clarity, transmits the course of the measured thread tension (signal 23) to the control unit 9. The signals coming from the thread tension sensor 2 in the control unit 9 modify the predetermined setpoints for guiding the drives 6, 8 in such a way that the change in the spindle speed required to compensate for thread tension deviations is accompanied by a change in the traversing speed in such a way that that the predetermined course of the crossing ratio and the laying angle remains unchanged.
Die in den Figuren 2 und 3 dargestellten Funktionsschaubilder stimmen in wesentlichen Teilen überein und sind daher mit den gleichen Bezugszeichen für die vergleichbaren Einheiten verse¬ hen.The functional diagrams shown in FIGS. 2 and 3 correspond in substantial parts and are therefore provided with the same reference numerals for the comparable units.
Vorgegeben sind bei beiden die durch die Grundfrequenzgenerato¬ ren 11 (für die Changierung) und 12 (für den Spulenantrieb) erzeugten Grundfrequenzen sowie der Sollwertverlauf 20 derFor both, the basic frequencies generated by the fundamental frequency generators 11 (for the traversing) and 12 (for the coil drive) as well as the setpoint curve 20 of the
ERSATZBLATT Fadenzugkraft. Die Generatoren 11, 12 erzeugen entsprechend den durch das Aufspulprogramm vorgegebenen Sollwerten 18, 19 die jeweiligen Grundfrequenzen für den Spulenantrieb und den Chan¬ gierantrieb, welche der zur Regeleinheit 9 gehörigen Spulkopf- Steuerung 14 zugeführt werden. In der Zuleitung von dem die Grundfrequenz 18 der Changierung erzeugenden Generator 11 zur Spulkopfsteuerung 14 (Anschluß CH) ist ein Störgenerator 13 vorgesehen, der der Erzeugung der dem Sollwert 18 der Changie¬ rung aufzugebenden Signale für das vorgesehene Störverfahren (z. B. Wobbelung)zur Unterdrückung der Spiegelbidung dient. Bei der zu einer Spulvorrichtung mit direkt angetriebener Spulspindel (Fig. 1) gehörenden Fig. 3 ist außerdem in der vom Grundfre¬ quenzgenerator 12 zum Anschluß S der SpulkopfSteuerung 14 füh¬ renden Leitung eine Spindelantriebsregelung 17 vorgesehen.REPLACEMENT LEAF Thread tension. The generators 11, 12 generate the respective basic frequencies for the bobbin drive and the chaning drive, which are supplied to the bobbin head control 14 belonging to the control unit 9, in accordance with the desired values 18, 19 specified by the winding program. In the feed line from the generator 11 generating the fundamental frequency 18 of the oscillation to the spool head control 14 (connection CH), a disturbance generator 13 is provided, which is used to generate the signals to be given to the setpoint 18 of the oscillation for the intended disturbance method (e.g. wobble) serves to suppress the mirror image. In the case of FIG. 3, which belongs to a winding device with a directly driven winding spindle (FIG. 1), a spindle drive control 17 is also provided in the line leading from the fundamental frequency generator 12 to the connection S of the winding head control 14.
Der SpulkopfSteuerung 14 werden die fortlaufend ermittelten Istwerte, nämlich 21 der Changierung 3 (Doppelhubzahl, Changier¬ frequenz), 22 der Spulspindeldrehzahl und 23 der Fadenspannung sowie bei der Ausführung nach Fig. 3 auch der durch die Tastwal¬ ze 24 ermittelten Spulenumfangsgeschwindigkeit (Signal 25), zugeführt. Daneben gelangen die Istwerte in eine zur Regelein¬ heit 9 gehörenden Einheit 16 zur Istwerteerfassung, wobei das Istwertsignal 23 der Fadenspannung zu einer Regeleinheit 15 für die Fadenspannung weitergegeben wird. Die in der Regeleinheit 15 erzeugten Korrektursignale gelangen über die Leitung 26 zum Anschluß S (Spulspindel) der Steuerung 14 und über die Leitung 27 zum Störgenerator 13 und von dort zusammen mit den Störsigna¬ len zum Anschluß CH der SpulkopfSteuerung 14. Dabei werden in beiden Eingängen der Steuerung 14 die von den Grundfrequenzgene¬ ratoren 11, 12 erzeugten Signale durch multiplikative Bewertung mit demselben Bewertungsfaktor in Abhängigkeit von der Fadenzug¬ kraft modifiziert.The winding head control 14 receives the continuously determined actual values, namely 21 the traverse 3 (double stroke rate, traversing frequency), 22 the winding spindle speed and 23 the thread tension, and in the embodiment according to FIG. 3 also the bobbin circumferential speed determined by the feeler roller 24 (signal 25 ). In addition, the actual values arrive in a unit 16 belonging to the control unit 9 for actual value detection, the actual value signal 23 of the thread tension being passed on to a control unit 15 for the thread tension. The correction signals generated in the control unit 15 pass via the line 26 to the connection S (winding spindle) of the control 14 and via the line 27 to the interference generator 13 and from there together with the interference signals to the connection CH of the winding head control 14 the controller 14 modifies the signals generated by the fundamental frequency generators 11, 12 by multiplicative evaluation with the same evaluation factor as a function of the thread tension.
Bei der Ausführung nach Fig. 3 ist darüber hinaus in der zum Spulspindelantrieb gehörenden Leitung vom Grundfrequenzgenerator3 is also in the line belonging to the winding spindle drive from the fundamental frequency generator
ERSATZBLATT 12 zur SpulkopfSteuerung 14 eine Regelung 17 für den Spulspin¬ delantrieb vorgesehen. Die von der Istwerte-Erfassung 16 kom¬ menden, zu den Istwerten 22 (Spulspindeldrehzahl) und 25 (Tast¬ walze) gehörenden Signale gelangen hier in die Regelung 17, das Istwert-Signal 22 der Spulspindeldrehzahl gelangt außerdem eben¬ so wie das Istwert-Signal 21 der Changierung zu dem Störgenera¬ tor 13.REPLACEMENT LEAF 12 for the winding head control 14, a regulation 17 for the winding spindle drive is provided. The signals coming from the actual value detection 16 and belonging to the actual values 22 (winding spindle speed) and 25 (sensing roller) are fed into the control 17, the actual value signal 22 of the winding spindle speed also arrives just like the actual value Signal 21 of the traversal to the interference generator 13.
In der SpulkopfSteuerung 14 werden in beiden Fällen die über Umrichter 30 den Antrieben 6, 8 zugeführten Leistungen derart modifiziert, daß ohne Störung des vorgegebenen Kreuzungsverhält¬ nisses und des Ablegewinkels der Istwert-Verlauf der Fadenzug¬ kraft dem Sollwert-Verlauf angepaßt wird.In both cases, the power supplied to the drives 6, 8 via the converter 30 is modified in the winding head control 14 in such a way that the actual value profile of the thread tension is adapted to the target value profile without disturbing the predetermined crossing ratio and the laying angle.
Es sei hier noch darauf hingewiesen, daß das an Hand der Fig. 1 bis 3 beschriebene Verfahren zur Steuerung der Antriebe 6,8 einer Spulspindel 5 und der ihr zugeordneten Changierung 3 auch auf eine Spulvorrichtung mit mehreren, auf einem Spulenrevolver angeordneten Spulspindeln anwendbar ist, wobei die Spulspindeln ebenfalls entweder durch einen Direktantrieb 5 nach Fig. 3 oder einen Friktionswalzenantrieb nach Fig. 2 angetrieben sein kön¬ nen.It should also be pointed out here that the method for controlling the drives 6, 8 of a winding spindle 5 and the traversing mechanism 3 assigned to them, which is described with reference to FIGS. 1 to 3, can also be applied to a winding device with a plurality of winding spindles arranged on a spindle turret, wherein the winding spindles can also be driven either by a direct drive 5 according to FIG. 3 or a friction roller drive according to FIG. 2.
ERSATZBLATT BEZUGSZEICHENAUFSTELLUNGREPLACEMENT LEAF REFERENCE SIGN LISTING
Faden Fadenzugkraftaufnehmer Changierung AufWicklung, Spule Spulspindel, Direktantrieb Wickelantrieb Antriebswelle Changierantrieb Regeleinheit Kopffadenführer Grundfrequenzgenerator Changierung Grundfrequenzgenerator Spulenantrieb Changierstör-Generator Spulkopf-Steuerung Fadenzugkraftregelung Istwerteerfassung Spindelantriebsregelung Sollfrequenz Changierung Sollfrequenz Spulspindelantrieb Sollwert Fadenzugkraft Istwert Changierung Istwert Spindeldrehzahl Istwert Fadenzugkraft Tastwalze Istwert Spulenumfangsgeschwindigkeit Signalleitung Signalleitung Energieversorgung Energieversorgung UmrichterThread Fadenzugkraftaufnehmer traversing winding, coil winding spindle, direct drive winding drive shaft traversing the drive control unit yarn guide fundamental frequency generator traversing fundamental frequency generator coil drive Changierstör generator winding head control yarn tension control Istwerteerfassung spindle drive control target frequency traversing setpoint frequency winding spindle drive setpoint yarn tension value traversing actual spindle speed actual yarn tension sensing roller actual bobbin peripheral speed signal line signal line power supply power supply converter
ERSATZBLATT REPLACEMENT LEAF

Claims

PATENTANSPRÜCHE PATENT CLAIMS
1. Verfahren zum Aufwickeln eines Fadens (1) zu einer Kreuzspule (4) in wilder Wicklung mit den Merkmalen: a) der Faden (1) wird durch ein Lieferwerk, welches mit konstanter Drehzahl angetrieben wird, einem ortsfesten Fadenführer (10) zugeführt; b) der Faden (1) wird durch eine Changiereinrichtung (3, 7, 8) unter Bildung eines Changierdreiecks zwischen dem Fadenführer (10) und der Spulenoberfläche hin- und herverlegt; c) es wird ein Changierprogramm vorgegeben, durch welches Changiersoliwerte (18) zur Steuerung des Changieran¬ triebs (8) derart erzeugt werden, daß der Faden (1) mit vom Spulendurchmesser unabhängigen Ablegewinkeln auf der Kreuzspule (4) abgelegt wird; d) die Kreuzspule (4) ist auf einer Spulspindel (5) auf¬ gespannt; e) zwischen dem Lieferwerk und dem ortsfesten Fadenführer (10) wird die Fadenzugkraft (Fadenzugkraftaufnehmer 2) gemessen; f) die Spulspindel (5) wird durch den Spulspindelantrieb in Abhängigkeit von der gemessenen Fadenzugkraft (23) mit einer Spulspindeldrehzahl derart drehend angetrie¬ ben, daß die Fadenzugkraft einem vorgegebenen Verlauf folgt; g) neben der Spulspindel (5) wird auch die Changierein¬ richtung (3, 7, 8) in Abhängigkeit von der gemessenen Fadenzugkraft (23) drehend angetrieben, indem der Changiersollwert (18) in demselben, von der Fadenzug¬ kraft (23) abhängigen Verhältnis wie die Spulspindel¬ drehzahl (19) verändert wird.1. A method for winding a thread (1) into a cross-wound bobbin (4) in the wild winding with the features: a) the thread (1) is fed to a fixed thread guide (10) by a delivery mechanism which is driven at constant speed; b) the thread (1) is moved back and forth between the thread guide (10) and the bobbin surface by a traversing device (3, 7, 8) to form a traversing triangle; c) a traversing program is specified, by means of which traversing sol values (18) for controlling the traversing drive (8) are generated in such a way that the thread (1) is deposited on the cross-wound bobbin (4) with laying angles independent of the bobbin diameter; d) the cheese (4) is stretched on a winding spindle (5); e) the thread tension force (thread tension force transducer 2) is measured between the delivery mechanism and the stationary thread guide (10); f) the winding spindle (5) is driven by the winding spindle drive in dependence on the measured thread tension (23) with a winding spindle speed such that the thread tension follows a predetermined course; g) in addition to the winding spindle (5), the traversing device (3, 7, 8) is driven in rotation depending on the measured thread tension (23) by the traversing setpoint (18) in the same, by the thread tension (23) dependent ratio of how the spindle speed (19) is changed.
ERSATZBLATT REPLACEMENT LEAF
2. Verfahren nach Anspruch 1 mit den weiteren Merkmalen: a) es wird ein Aufspulprogramm mit Geschwindigkeits- Sollwerten (19) zur Steuerung des Spulspindelantriebs (6) derart vorgegeben, daß die Kreuzspule (4) mit vor¬ gegebenem Verlauf der Umfangsgeschwindigkeit angetrie¬ ben wird;2. The method according to claim 1 with the further features: a) a winding program with speed setpoints (19) for controlling the winding spindle drive (6) is specified such that the package (4) is driven with a predetermined course of the peripheral speed becomes;
b) die Geschwindigkeits- Sollwerte (19) werden in demsel¬ ben, von der Fadenzugkraft (23), abhängigen Verhältnis verändert wie die Changier-Sollwerte (18).b) the speed setpoints (19) are changed in the same, depending on the thread tension (23), dependent ratio as the traversing setpoints (18).
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Spulspindelantrieb eine am Umfang der Kreuzspule (4) anliegende Treibwalze mit Treibwalzenmotor ist, welchem die Geschwindigkeits- Sollwerte (19)vorgegeben werden;3. The method according to claim 1 or 2, characterized in that the winding spindle drive is a drive roller on the circumference of the cross-wound bobbin (4) with a drive roller motor, which the speed setpoints (19) are predetermined;
4. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß a) der Spulspindelantrieb ein Spindelmotor (6) ist; b) daß am Umfang der Kreuzspule (4) eine Tastwalze (24) anliegt, deren Drehzahl (25) laufend gemessen wird und daß c) der Spindelmotor (6) in Abhängigkeit von der gemes¬ senen Drehzahl (25) sowie in Abhängigkeit von den vorgegebenen Geschwindigkeits- Sollwerten (19) ges¬ teuert wird.4. The method according to claim 1 or 2, characterized in that a) the winding spindle drive is a spindle motor (6); b) that on the circumference of the package (4) there is a sensing roller (24), the speed (25) of which is continuously measured and that c) the spindle motor (6) as a function of the measured speed (25) and as a function of the predetermined speed setpoints (19) is controlled.
ERSATZBLATT REPLACEMENT LEAF
EP94922224A 1993-08-14 1994-08-04 Method of winding a yarn on to a cross-wound bobbin Expired - Lifetime EP0664765B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4327394 1993-08-14
DE4327394 1993-08-14
PCT/DE1994/000906 WO1995005333A1 (en) 1993-08-14 1994-08-04 Method of winding a yarn on to a cross-wound bobbin

Publications (2)

Publication Number Publication Date
EP0664765A1 true EP0664765A1 (en) 1995-08-02
EP0664765B1 EP0664765B1 (en) 1998-07-15

Family

ID=6495233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94922224A Expired - Lifetime EP0664765B1 (en) 1993-08-14 1994-08-04 Method of winding a yarn on to a cross-wound bobbin

Country Status (7)

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EP (1) EP0664765B1 (en)
KR (1) KR100310963B1 (en)
CN (1) CN1113654A (en)
DE (1) DE59406453D1 (en)
TW (1) TW300258B (en)
WO (1) WO1995005333A1 (en)

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Also Published As

Publication number Publication date
US5740981A (en) 1998-04-21
EP0664765B1 (en) 1998-07-15
DE59406453D1 (en) 1998-08-20
KR100310963B1 (en) 2001-12-28
TW300258B (en) 1997-03-11
WO1995005333A1 (en) 1995-02-23
KR950703481A (en) 1995-09-20
CN1113654A (en) 1995-12-20

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