EP2626324A2 - Method and device for determining the necessary speed of rotation of a coil drive roller - Google Patents

Method and device for determining the necessary speed of rotation of a coil drive roller Download PDF

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Publication number
EP2626324A2
EP2626324A2 EP13000107.6A EP13000107A EP2626324A2 EP 2626324 A2 EP2626324 A2 EP 2626324A2 EP 13000107 A EP13000107 A EP 13000107A EP 2626324 A2 EP2626324 A2 EP 2626324A2
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EP
European Patent Office
Prior art keywords
bobbin
cross
wound
drive roller
speed
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
EP13000107.6A
Other languages
German (de)
French (fr)
Other versions
EP2626324B1 (en
EP2626324A3 (en
Inventor
Heinz-Dieter Göbbels
Heinz-Josef Peuker
Günter Scheer
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.)
Saurer Spinning Solutions GmbH and Co KG
Original Assignee
Oerlikon Textile GmbH and Co KG
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Publication of EP2626324A2 publication Critical patent/EP2626324A2/en
Publication of EP2626324A3 publication Critical patent/EP2626324A3/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
    • B65H54/10—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers for making packages of specified shapes or on specified types of bobbins, tubes, cores, or formers
    • B65H54/103—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers for making packages of specified shapes or on specified types of bobbins, tubes, cores, or formers forming frusto-conical packages or forming packages on frusto-conical bobbins, tubes, cores or formers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B65H51/205—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage by means of a fluid
    • 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
    • B65H54/40—Arrangements for rotating packages
    • B65H54/42—Arrangements for rotating packages in which the package, core, or former is rotated by frictional contact of its periphery with a driving surface
    • 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 determining the required speed of a bobbin drive roller when driving a conical sleeve or cross-wound bobbin, which is held in the bobbin frame a job of a cheese-producing textile machine, the single-motor controlled bobbin drive roller of the job frictionally drives the conical sleeve and later cheese, and a Cheese-making textile machine for carrying out the method.
  • a method for controlling a traversing device driven by a single motor drive on a device for winding conical cheeses and a textile machine producing cross-cheeses are known, for example, from US Pat CH 698 687 A2 known.
  • a so-called conicity factor is determined in advance.
  • This Konizticians tone describes the ratio of the thread laying speeds at the end faces of the cheese and is specified to the winding station computer.
  • a modified Konizticianstex is fixed at the beginning of the coil travel, which approaches in the course of the coil travel to the beginning of the coil assembly set value.
  • the DE 29 11 340 A1 describes a method for cross-winding a thread and a device for driving a bobbin on which the thread is wound.
  • a drive shaft with a concentrically arranged drive bale whose diameter is dimensioned slightly larger is used as the actual diameter of the roller, so that it comes in the contact area, which is located in the middle coil area, to a reliable frictional engagement between the drive shaft and cross-wound bobbin.
  • a disadvantage of the method according to the prior art proves that the manufactured conical cheeses do not always meet the required high quality standard.
  • the Konizticians tone is based on a theoretical value and can only approximate the actual tube or bobbin diameter, while the bobbin drive roller with special roller surface for conical sleeves / coils not only requires a second bobbin drive roller for the production of cylindrical coils, but also a conversion of the machine Change the format of the coils to be produced.
  • the bobbin frame must be aligned very accurately to the bobbin drive roller, since even bobbin drive rollers with a special roller surface prevent limited entrainment on the sleeve or coil edge. Often an adjustment of the creel is necessary. Although due to the elasticity of the winding body, the behavior is equalized from a certain thickness of lining, and cheeses not running parallel to the bobbin drive roller are less detrimental. Nevertheless, this remains a quality problem and can negatively affect subsequent processes.
  • the driven diameter is the diameter at which the peripheral speed of the cheese coincides with the peripheral speed of the drive roller; he is subject, especially at the beginning of the cross-wound coil construction slip-related fluctuations.
  • a strong fluctuation in the position of the driven diameter in turn causes a change in the yarn speed or the yarn tension.
  • the actual drive point on the conical sleeve and later on the conical cheese may deviate from the geometric centerline. Is the contact area of the conical sleeve with the coil drive roller, with respect to the geometric center line, on the narrower side of the bobbin, so the winding tension increases; However, if this contact area lies on the wider side, the sleeve or cross-wound bobbin has a lower winding speed.
  • the object of the present invention is to propose a method or a device which reduces the fluctuations of the speed of cheeses, in particular at the beginning of the coil travel.
  • the detection of the speed pulses already takes place before an application process, so that the respective drive diameter of the sleeve or cross-wound bobbin takes place during the application process when selecting the adapted speed range of the bobbin drive roller.
  • this rotational speed can be controlled during the piecing process so that a pneumatic yarn store of the work station is emptied in the predetermined time. Due to the precise control of the pneumatic thread store, thread breaks due to excessive winding tension and loose thread layers due to insufficient winding tension can be avoided.
  • each job has a device that senses the pulses of rotating on the bobbin drive roller sleeve or cross-wound bobbin and forwards to a control device, from the timing of the pulses the drive diameter of the sleeve or cross-wound bobbin and from it as a result, the speed of the bobbin drive roller adapted to the drive diameter is calculated.
  • FIG. 1 shows a side view of a job 2 an open-end rotor spinning machine 1.
  • Such an open-end rotor spinning machine 1 has on its two longitudinal sides of each machine a plurality 2. Construction and mode of action of the workstations 2 are in each case identical, so that the explanation is made only on the basis of a workstation 2.
  • FIG. 1 and FIG. 2 show a job 2, which has an open-end spinning device 3 and a winding device 4 including a suction nozzle 25.
  • a sliver 6 presented in sliver cans 5 is spun into a yarn 7.
  • the thread 7 is then wound in the winding device 4 to a cross-wound bobbin 8.
  • the cross-wound bobbin 8 is held in a winding frame 9 during the spinning / winding process in the winding device 4 and is thereby driven via a bobbin drive roller 10 by means of frictional engagement.
  • the coil frame 9 is mounted pivotably about a pivot axis 11.
  • the thread 7 is withdrawn from the open-end spinning device 3 by a thread withdrawal device 12, which consists of a driven roller and a pressure roller resting on the roller, with a defined, uniform yarn delivery speed.
  • the withdrawal speed of the stripping device 12 thus determines the delivery speed of the thread 7 and thus the winding speed with which the thread 7 has to be wound onto the cross-wound bobbin 8.
  • a thread store 13 In the thread running direction of the thread withdrawal 12 a thread store 13, a waxing device 14 and a thread guide 15 are arranged downstream.
  • the yarn guide 15 alternates in a straight line in front of the outer circumference of the cheeses 8 and thus ensures, with simultaneous drive of the cheese 8 on the bobbin drive roller 10 that the yarn 7 is wound in intersecting layers on the cheese 8.
  • the open-end rotor spinning machine 1 is associated with an only indicated here, automatically operating control unit 22, which is guided with its chassis 23 on rails 24.
  • the rails 24 extend in the superstructure of the open-end rotor spinning machine 1, on which the operating unit 22 along the open-end rotor spinning machine 1 is movable.
  • the operating unit 22 comprises a plurality of handling devices, not shown in detail, for cleaning the spinning rotors or for changing the cheeses 8.
  • the operation of the jobs 2 is, for example by the DE 10 2005 036 485 A1 or the DE 101 39 075 A1 so that it need not be discussed further in the context of the present description.
  • FIG. 2 illustrates in perspective view a job 2 an open-end rotor spinning machine; the thread 7 leaves the open-end spinning device 3 by a so-called thread withdrawal tube 29, in the area also a pivotally mounted Anspinncousorgan 27 is arranged, which takes after a thread interruption by a suction nozzle 25 from the cheese 8 back retrieved thread 7 and the thread end to the thread connection prepared.
  • a thread monitor 30, a pneumatic thread storage device 13 and a waxing device 14 are arranged in the area of the thread running path.
  • the pneumatic thread storage device 13 is designed as a discontinuous working memory, that is, the thread storage device 13 is completely emptied after each thread connecting operation. During operation of the open-end spinning device 3, the thread storage device 13 is acted upon if necessary via a vacuum source, not shown, with suction air.
  • Such work stations 2 have a suction nozzle 25, which is adjustable by means of a stepping motor 17 between a thread receiving position lying in the region of the winding device 4 and a yarn transfer position lying in the region of the spinning device 3.
  • the individual stepper motors of the components of the workstation 2 are connected via various control lines to a control device, in the present exemplary embodiment to a workstation computer 19.
  • the individual motor drives of the components of the workstations 2 can be controlled independently of each other.
  • the inventive method will be described below with reference to the illustrated embodiments of the open-end rotor spinning machine.
  • the yarn winding speed of a cross-wound bobbin 8 results from the rotational speed and the diameter of the bobbin drive roller 10 and the driven diameter of the cheese 8.
  • the yarn winding speed of the winding device 4 must be matched with the yarn guide speed of the thread traversing device 15 to the yarn delivery speed of the spinning device 3 be.
  • the speed is by the inventive measures the bobbin drive roller 10 individual motor 28 adapted to the respective drive diameter, so that the supply of the yarn 7 takes place at a constant winding tension.
  • the thread store 13 is emptied in the predetermined time.
  • a piecing process In a piecing process, first the sliver feed, the drives of the thread take-off roll 12, the Fadenchangier immunity 15 and the bobbin drive roller 10 are stopped and the cheese to be produced 8 is lifted by means of the coil frame 9 of the bobbin drive roller 10. Subsequently, a piecing process is initiated, wherein the sliver feed, the drives of the thread take-off roll 12, the Fadenchangier immunity 15 and the bobbin drive roller 10 are put into operation synchronously to initiate the piecing process again.
  • the commissioning of the thread take-off roller 12, the Fadenchangier noisy 15 and the bobbin drive roller 10 is carried out taking into account temporally coordinated acceleration processes of the individual drives, which should take into account in particular the different moments of inertia and the traction of the operating components to be taken into account.
  • the invention provides that the angular momenta of the cheese 8 are sensed before a piecing or piecing process, as well as from the time sequence of the respective drive diameter is calculated to based on it already at the beginning of the bobbin travel, the speed of the bobbin drive roller 10 choose.

Abstract

The method involves supplying the thread by a yarn outlet unit in a continuous manner, where the sensory rotation pulses of a cross-wound bobbin (8) are detected. The timing of the rotation pulses is measured such that the respective driving diameter of the conical cross-wound bobbin is calculated. The speed of the bobbin drive roller (10) is balanced on the driving diameter. The detection of the speed pulses takes place before an application process at a non-wound cross-wound bobbin. An independent claim is included for a working station with a control unit.

Description

Die Erfindung betrifft ein Verfahren zur Ermittlung der erforderlichen Drehzahl einer Spulenantriebswalze beim Antreiben einer konischen Hülse respektive Kreuzspule, die im Spulenrahmen einer Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine gehaltert ist, wobei die einzelmotorisch gesteuerte Spulenantriebswalze der Arbeitsstelle reibschlüssig die konische Hülse und spätere Kreuzspule antreibt, sowie eine Kreuzspulen herstellende Textilmaschine zur Durchführung des Verfahrens.The invention relates to a method for determining the required speed of a bobbin drive roller when driving a conical sleeve or cross-wound bobbin, which is held in the bobbin frame a job of a cheese-producing textile machine, the single-motor controlled bobbin drive roller of the job frictionally drives the conical sleeve and later cheese, and a Cheese-making textile machine for carrying out the method.

In den Arbeitsstellen einer Spinnmaschine werden im so genannten Spulapparat neben zylindrischen auch konische Spulen hergestellt, für deren gleichmäßigen Spulenaufbau die Zuführung des Fadens mit einer konstanten Wickelspannung außerordentlich entscheidend ist. Diese Spannung, mit der der Faden aufgewickelt wird, wirkt sich nicht nur maßgeblich auf die Qualität des Spulenaufbaus aus, sondern beeinflusst ebenfalls den kontinuierlichen Ablauf des Spinn- bzw. Wickelprozesses.In the workstations of a spinning machine in addition to cylindrical conical coils are produced in the so-called winding apparatus, for the uniform coil structure, the supply of the yarn with a constant winding tension is extremely crucial. This tension, with which the thread is wound up, not only has a decisive effect on the quality of the coil structure, but also influences the continuous course of the spinning or winding process.

Ein Verfahren zur Steuerung einer von einem einzelmotorischen Antrieb angetriebenen Changiereinrichtung an einer Vorrichtung zum Wickeln konischer Kreuzspulen sowie eine Kreuzspulen herstellende Textilmaschine sind zum Beispiel aus der CH 698 687 A2 bekannt. Um den Spulenaufbau möglichst exakt an die Hülsengeometrie anzugleichen, beschreibt die schweizerische Offenlegungsschrift CH 698 687 A2 , dass vorab ein so genannter Konizitätsfaktor bestimmt wird. Dieser Konizitätsfaktor beschreibt das Verhältnis der Fadenverlegegeschwindigkeiten an den Stirnseiten der Kreuzspule und wird dem Spulstellenrechner vorgegeben. Zur Ansteuerung des Antriebes wird zu Beginn der Spulenreise ein modifizierter Konizitätsfaktor festgesetzt, der sich im Verlauf der Spulenreise dem zu Beginn des Spulenaufbaus festgesetzten Wert annähert.A method for controlling a traversing device driven by a single motor drive on a device for winding conical cheeses and a textile machine producing cross-cheeses are known, for example, from US Pat CH 698 687 A2 known. In order to match the coil structure as exactly as possible to the sleeve geometry, describes the Swiss patent application CH 698 687 A2 in that a so-called conicity factor is determined in advance. This Konizitätsfaktor describes the ratio of the thread laying speeds at the end faces of the cheese and is specified to the winding station computer. To control the drive, a modified Konizitätsfaktor is fixed at the beginning of the coil travel, which approaches in the course of the coil travel to the beginning of the coil assembly set value.

Die DE 29 11 340 A1 beschreibt ein Verfahren zur Kreuzwicklung eines Fadens sowie eine Vorrichtung zum Antrieb eines Spulenkörpers, auf den der Faden aufgewickelt wird. Zum Aufwickeln eines Fadens auf einen konischen Spulenkörper wird eine Antriebswelle mit einem konzentrisch angeordneten Antriebsballen, dessen Durchmesser etwas größer dimensioniert ist als der eigentliche Durchmesser der Walze, eingesetzt, so dass es im Kontaktbereich, der im mittleren Spulenbereich liegt, zu einem zuverlässigen Reibschluss zwischen Antriebswelle und Kreuzspule kommt.The DE 29 11 340 A1 describes a method for cross-winding a thread and a device for driving a bobbin on which the thread is wound. To wind a thread on a conical bobbin, a drive shaft with a concentrically arranged drive bale whose diameter is dimensioned slightly larger is used as the actual diameter of the roller, so that it comes in the contact area, which is located in the middle coil area, to a reliable frictional engagement between the drive shaft and cross-wound bobbin.

Als nachteilig an den Verfahren gemäß dem Stand der Technik erweist sich, dass die gefertigten konischen Kreuzspulen nicht in jedem Fall dem geforderten hohen Qualitätsstandard entsprechen. Der Konizitätsfaktor beruht auf einem theoretischen Wert und kann sich dem tatsächlichen Hülsen- bzw. Spulendurchmesser nur annähern, während die Spulenantriebswalze mit spezieller Walzenoberfläche für konische Hülsen /Spulen nicht nur eine zweite Spulenantriebswalze für die Herstellung zylindrischer Spulen erfordert, sondern ebenso ein Umrüsten der Maschine beim Wechsel des Formats der herzustellenden Spulen.A disadvantage of the method according to the prior art proves that the manufactured conical cheeses do not always meet the required high quality standard. The Konizitätsfaktor is based on a theoretical value and can only approximate the actual tube or bobbin diameter, while the bobbin drive roller with special roller surface for conical sleeves / coils not only requires a second bobbin drive roller for the production of cylindrical coils, but also a conversion of the machine Change the format of the coils to be produced.

Außerdem muss der Spulenrahmen sehr genau zur Spulenantriebswalze ausgerichtet werden, da auch Spulenantriebswalzen mit spezieller Walzenoberfläche nur begrenzt eine Mitnahme auf der Hülsen- bzw. Spulenkante verhindern. Oftmals ist ein Nachstellen der Spulenrahmen nötig. Zwar egalisiert sich durch die Elastizität des Wickelkörpers das Verhalten ab einer gewissen Belagstärke, und nicht genau parallel zur Spulenantriebswalze laufende Kreuzspulen wirken sich weniger nachteilig aus. Dennoch bleibt dies ein Qualitätsproblem und kann die nachfolgenden Prozesse negativ beeinflussen.In addition, the bobbin frame must be aligned very accurately to the bobbin drive roller, since even bobbin drive rollers with a special roller surface prevent limited entrainment on the sleeve or coil edge. Often an adjustment of the creel is necessary. Although due to the elasticity of the winding body, the behavior is equalized from a certain thickness of lining, and cheeses not running parallel to the bobbin drive roller are less detrimental. Nevertheless, this remains a quality problem and can negatively affect subsequent processes.

Maßgeblich für eine konstante Wickelgeschwindigkeit der konischen Hülse bzw. Kreuzspule ist bei einem reibschlüssigen Antrieb der so genannte angetriebene Durchmesser. Der angetriebene Durchmesser ist jeweils der Durchmesser, bei dem die Umfangsgeschwindigkeit der Kreuzspule mit der Umfangsgeschwindigkeit der Antriebswalze übereinstimmt; er unterliegt dabei besonders zu Beginn des Kreuzspulenaufbaus schlupfbedingten Schwankungen. Eine starke Schwankung der Lage des angetriebenen Durchmessers bewirkt wiederum eine Änderung der Fadengeschwindigkeit respektive der Fadenzugkraft.Decisive for a constant winding speed of the conical sleeve or cheese is in a frictional drive the so-called driven diameter. The driven diameter is the diameter at which the peripheral speed of the cheese coincides with the peripheral speed of the drive roller; he is subject, especially at the beginning of the cross-wound coil construction slip-related fluctuations. A strong fluctuation in the position of the driven diameter in turn causes a change in the yarn speed or the yarn tension.

Der tatsächliche Antriebspunkt auf der konischen Hülse und später auf der konischen Kreuzspule kann von der geometrischen Mittellinie abweichen. Liegt der Kontaktbereich der konischen Hülse bzw. Kreuzspule mit dem der Spulenantriebswalze, in Bezug zur geometrischen Mittellinie, auf der schmaleren Seite des Spulenkörpers, so nimmt die Wickelspannung zu; liegt aber dieser Kontaktbereich auf der breiteren Seite, weist die Hülse bzw. Kreuzspule eine niedrigere Wickelgeschwindigkeit auf.The actual drive point on the conical sleeve and later on the conical cheese may deviate from the geometric centerline. Is the contact area of the conical sleeve with the coil drive roller, with respect to the geometric center line, on the narrower side of the bobbin, so the winding tension increases; However, if this contact area lies on the wider side, the sleeve or cross-wound bobbin has a lower winding speed.

Diese Faktoren sind Gründe für Unterschiede in der Wickelspannung bis hin zu Fadenbrüchen in den einzelnen Arbeitsstellen einer Kreuzspulen herstellenden Textilmaschine und wirken sich zusätzlich negativ auf das Leeren des Fadenspeichers beim Fadenanlegen bzw. Anspinnen aus. Insbesondere beim Anlegevorgang auf eine leere konische Hülse kann der pneumatische Fadenspeicher nicht präzise angesteuert werden und es können hier infolge zu hoher Wickelspannung vermehrt Fadenbrüche auftreten, sofern die Hülse auf der schmaleren Seite, in Bezug zur geometrischen Mittellinie, angetrieben wird; respektive zu lockeren Fadenlagen aufgrund geringerer Wickelspannung, wenn die Hülse auf ihrer breiteren Seite angetrieben wird.These factors are reasons for differences in the winding tension to thread breaks in the individual jobs of a cheese-producing textile machine and also have a negative effect on the emptying of the thread storage when threading or piecing. In particular, when applying to an empty conical sleeve, the pneumatic yarn storage can not be precisely controlled and it can here due to high winding tension increased yarn breaks occur, provided that the sleeve is driven on the narrower side, with respect to the geometric center line; Too loose thread layers due to lower winding tension when the sleeve is driven on its wider side.

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren bzw. eine Vorrichtung vorzuschlagen, das/die Schwankungen der Drehzahl von Kreuzspulen, insbesondere zu Beginn der Spulenreise, reduziert.The object of the present invention is to propose a method or a device which reduces the fluctuations of the speed of cheeses, in particular at the beginning of the coil travel.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 für ein Verfahren sowie durch die Merkmale des Anspruches 4 für eine Kreuzspulen herstellende Textilmaschine gelöst.This object is achieved by the features of claim 1 for a method and by the features of claim 4 for a cheese-producing textile machine.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Gemäß Anspruch 1 ist vorgesehen, dass sensorisch Drehimpulse der konischen Kreuzspule erfasst werden, dass die zeitliche Abfolge der Drehimpulse gemessen wird, dass daraus der jeweilige Antriebsdurchmesser der konischen Kreuzspule berechnet wird und dass die Drehzahl der Spulenantriebswalze auf diesen Antriebsdurchmesser abgestimmt wird. Aufgrund der Erfassung der einzelnen Drehimpulse in Abhängigkeit von der Zeit kann der jeweilige Kreuzspulendurchmesser exakt berechnet und die erforderliche Drehzahl der Spulenantriebswalze angesteuert werden. Dieses Verfahren wird vom Startpunkt der Spulenreise an realisiert und in der Startphase oder auch während der gesamten Spulenreise durchgeführt.According to claim 1 it is provided that sensory angular momenta of the conical cheese are detected, that the time sequence of the angular momenta is measured, that from the respective drive diameter of the conical cheese is calculated and that the speed of the bobbin drive roller is tuned to this drive diameter. Due to the detection of the individual angular momenta as a function of time, the respective cheese diameter can be calculated exactly and the required speed of the bobbin drive roller can be controlled. This method is realized from the starting point of the coil travel and carried out in the starting phase or during the entire coil travel.

Vorzugsweise findet die Erfassung der Drehzahlimpulse bereits vor einem Anlegevorgang statt, so dass bereits beim Anlegevorgang der jeweilige Antriebsdurchmesser der Hülse bzw. der Kreuzspule bei der Wahl des angepassten Drehzahlbereichs der Spulenantriebswalze erfolgt. Dadurch wird das Erreichen einer konstanten Wickelspannung nicht nur während sondern auch zu Beginn des Spulprozesses ermöglicht (Anspruch 2).Preferably, the detection of the speed pulses already takes place before an application process, so that the respective drive diameter of the sleeve or cross-wound bobbin takes place during the application process when selecting the adapted speed range of the bobbin drive roller. This makes it possible to achieve a constant winding tension not only during but also at the beginning of the winding process (claim 2).

Des Weiteren kann gemäß Anspruch 3 durch die Anpassung der Drehzahl der Spulenantriebswalze an den Antriebsdurchmesser der Kreuzspule diese Drehzahl während des Anspinnvorgangs so gesteuert werden, dass ein pneumatischer Fadenspeicher der Arbeitsstelle in der vorgegebenen Zeit entleert wird. Durch die präzise Ansteuerung des pneumatischen Fadenspeichers können Fadenbrüche aufgrund zu hoher Wickelspannung und lockere Fadenlagen durch zu geringe Wickelspannung vermieden werden.Furthermore, according to claim 3, by adjusting the rotational speed of the bobbin drive roller to the drive diameter of the cross-wound bobbin, this rotational speed can be controlled during the piecing process so that a pneumatic yarn store of the work station is emptied in the predetermined time. Due to the precise control of the pneumatic thread store, thread breaks due to excessive winding tension and loose thread layers due to insufficient winding tension can be avoided.

Gemäß dem Verfahrensanspruch 4 wird vorgeschlagen, dass jede Arbeitsstelle eine Einrichtung aufweist, die sensorisch die Impulse der auf der Spulenantriebswalze rotierenden Hülse bzw. Kreuzspule erfasst und an eine Steuereinrichtung weiterleitet, die aus der zeitlichen Abfolge der Impulse den Antriebsdurchmesser der Hülse bzw. Kreuzspule sowie daraus resultierend die auf den Antriebsdurchmesser angepasste Drehzahl der Spulenantriebswalze berechnet.According to the method claim 4 is proposed that each job has a device that senses the pulses of rotating on the bobbin drive roller sleeve or cross-wound bobbin and forwards to a control device, from the timing of the pulses the drive diameter of the sleeve or cross-wound bobbin and from it as a result, the speed of the bobbin drive roller adapted to the drive diameter is calculated.

Die vorliegende Erfindung wird nachfolgend anhand einer schematisiert dargestellten Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine erläutert.The present invention will be explained below with reference to a schematically illustrated workstation of a textile machine producing cross-wound bobbins.

Es zeigen

Fig. 1
eine schematische Seitenansicht einer Arbeitsstelle einer Offenend-Rotorspinnmaschine;
Fig. 2
eine perspektivische Darstellung der Spulvorrichtung gemäß Fig. 1.
Show it
Fig. 1
a schematic side view of a workstation of an open-end rotor spinning machine;
Fig. 2
a perspective view of the winding device according to Fig. 1 ,

Figur 1 zeigt eine Seitenansicht einer Arbeitsstelle 2 einer Offenend-Rotorspinnmaschine 1. Eine derartige Offenend-Rotorspinnmaschine 1 besitzt auf ihren beiden Maschinenlängsseiten jeweils eine Vielzahl solcher nebeneinander angeordneter Arbeitsstellen 2. Aufbau und Wirkungsweise der Arbeitsstellen 2 sind dabei jeweils identisch, so dass die Erläuterung lediglich anhand einer Arbeitsstelle 2 erfolgt. FIG. 1 shows a side view of a job 2 an open-end rotor spinning machine 1. Such an open-end rotor spinning machine 1 has on its two longitudinal sides of each machine a plurality 2. Construction and mode of action of the workstations 2 are in each case identical, so that the explanation is made only on the basis of a workstation 2.

Figur 1 und Figur 2 zeigen eine Arbeitsstelle 2, die eine Offenend-Spinnvorrichtung 3 sowie eine Spulvorrichtung 4 inklusive einer Saugdüse 25 aufweist. In der Offenend-Spinnvorrichtung 3 wird, wie bekannt, ein in Spinnkannen 5 vorgelegtes Faserband 6 zu einem Faden 7 versponnen. Der Faden 7 wird anschließend in der Spuleinrichtung 4 zu einer Kreuzspule 8 aufgewickelt. Die Kreuzspule 8 ist während des Spinn-/Spulprozesses in der Spuleinrichtung 4 in einem Spulenrahmen 9 gehalten und wird dabei über eine Spulenantriebswalze 10 mittels Reibschluss angetrieben. Der Spulenrahmen 9 ist um eine Schwenkachse 11 verschwenkbar gelagert. FIG. 1 and FIG. 2 show a job 2, which has an open-end spinning device 3 and a winding device 4 including a suction nozzle 25. In the open-end spinning apparatus 3, as is known, a sliver 6 presented in sliver cans 5 is spun into a yarn 7. The thread 7 is then wound in the winding device 4 to a cross-wound bobbin 8. The cross-wound bobbin 8 is held in a winding frame 9 during the spinning / winding process in the winding device 4 and is thereby driven via a bobbin drive roller 10 by means of frictional engagement. The coil frame 9 is mounted pivotably about a pivot axis 11.

Der Faden 7 wird durch eine Fadenabzieheinrichtung 12, die aus einer angetriebenen Walze und einer auf der Walze aufliegenden Druckrolle besteht, mit definierter, gleichbleibender Fadenliefergeschwindigkeit aus der Offenend-Spinnvorrichtung 3 abgezogen. Die Abzugsgeschwindigkeit der Abzieheinrichtung 12 bestimmt somit die Liefergeschwindigkeit des Fadens 7 und damit die Wickelgeschwindigkeit, mit der der Faden 7 auf die Kreuzspule 8 aufgewickelt werden muss.The thread 7 is withdrawn from the open-end spinning device 3 by a thread withdrawal device 12, which consists of a driven roller and a pressure roller resting on the roller, with a defined, uniform yarn delivery speed. The withdrawal speed of the stripping device 12 thus determines the delivery speed of the thread 7 and thus the winding speed with which the thread 7 has to be wound onto the cross-wound bobbin 8.

In Fadenlaufrichtung sind der Fadenabzieheinrichtung 12 ein Fadenspeicher 13, eine Paraffiniereinrichtung 14 sowie ein Fadenführer 15 nachgeordnet. Der Fadenführer 15 changiert geradlinig vor dem Außenumfang der Kreuzspule 8 und sorgt somit bei gleichzeitigem Antrieb der Kreuzspule 8 über die Spulenantriebswalze 10 dafür, dass der Faden 7 in sich kreuzenden Lagen auf die Kreuzspule 8 aufgespult wird.In the thread running direction of the thread withdrawal 12 a thread store 13, a waxing device 14 and a thread guide 15 are arranged downstream. The yarn guide 15 alternates in a straight line in front of the outer circumference of the cheeses 8 and thus ensures, with simultaneous drive of the cheese 8 on the bobbin drive roller 10 that the yarn 7 is wound in intersecting layers on the cheese 8.

Der Offenend-Rotorspinnmaschine 1 ist ein hier nur angedeutetes, selbsttätig arbeitendes Bedienaggregat 22 zugeordnet, das mit seinem Fahrwerk 23 auf Schienen 24 geführt ist. Die Schienen 24 verlaufen im Oberbau der Offenend-Rotorspinnmaschine 1, auf denen das Bedienaggregat 22 längs der Offenend-Rotorspinnmaschine 1 verfahrbar ist. Das Bedienaggregat 22 umfasst eine Vielzahl im Einzelnen nicht dargestellte Handhabungseinrichtungen zum Reinigen der Spinnrotoren oder zum Wechseln der Kreuzspulen 8.The open-end rotor spinning machine 1 is associated with an only indicated here, automatically operating control unit 22, which is guided with its chassis 23 on rails 24. The rails 24 extend in the superstructure of the open-end rotor spinning machine 1, on which the operating unit 22 along the open-end rotor spinning machine 1 is movable. The operating unit 22 comprises a plurality of handling devices, not shown in detail, for cleaning the spinning rotors or for changing the cheeses 8.

Die Funktionsweise der Arbeitsstellen 2 ist zum Beispiel durch die DE 10 2005 036 485 A1 oder der DE 101 39 075 A1 bekannt, so dass im Rahmen der vorliegenden Beschreibung nicht näher darauf eingegangen werden muss.The operation of the jobs 2 is, for example by the DE 10 2005 036 485 A1 or the DE 101 39 075 A1 so that it need not be discussed further in the context of the present description.

Figur 2 verdeutlicht in perspektivischer Darstellung eine Arbeitsstelle 2 einer Offenend-Rotorspinnmaschine; der Faden 7 verlässt die Offenend-Spinnvorrichtung 3 durch ein so genanntes Fadenabzugsröhrchen 29, in dessen Bereich außerdem ein schwenkbar gelagertes Anspinnhilfsorgan 27 angeordnet ist, das nach einer Fadenunterbrechung den durch eine Saugdüse 25 von der Kreuzspule 8 zurückgeholten Faden 7 übernimmt und das Fadenende zur Fadenverbindung vorbereitet. FIG. 2 illustrates in perspective view a job 2 an open-end rotor spinning machine; the thread 7 leaves the open-end spinning device 3 by a so-called thread withdrawal tube 29, in the area also a pivotally mounted Anspinnhilfsorgan 27 is arranged, which takes after a thread interruption by a suction nozzle 25 from the cheese 8 back retrieved thread 7 and the thread end to the thread connection prepared.

Im Bereich des Fadenlaufweges sind des Weiteren ein Fadenwächter 30, eine pneumatische Fadenspeichereinrichtung 13 sowie eine Paraffiniereinrichtung 14 angeordnet. Die pneumatische Fadenspeichereinrichtung 13 ist als diskontinuierlich arbeitender Speicher ausgebildet, das heißt, die Fadenspeichereinrichtung 13 wird nach jedem erfolgten Fadenverbindungsvorgang vollständig entleert. Während des Betriebes der Offenend-Spinnvorrichtung 3 wird die Fadenspeichereinrichtung 13 bei Bedarf über eine nicht dargestellte Unterdruckquelle mit Saugluft beaufschlagt.Furthermore, a thread monitor 30, a pneumatic thread storage device 13 and a waxing device 14 are arranged in the area of the thread running path. The pneumatic thread storage device 13 is designed as a discontinuous working memory, that is, the thread storage device 13 is completely emptied after each thread connecting operation. During operation of the open-end spinning device 3, the thread storage device 13 is acted upon if necessary via a vacuum source, not shown, with suction air.

Des Weiteren verfügen derartige Arbeitsstellen 2, wie bereits erwähnt, über eine Saugdüse 25, die mittels eines Schrittmotors 17 definiert zwischen einer im Bereich der Spulvorrichtung 4 liegenden Fadenaufnahmestellung und einer im Bereich der Spinnvorrichtung 3 liegenden Fadenübergabestellung verstellbar ist.Furthermore, such work stations 2, as already mentioned, have a suction nozzle 25, which is adjustable by means of a stepping motor 17 between a thread receiving position lying in the region of the winding device 4 and a yarn transfer position lying in the region of the spinning device 3.

Wie üblich, sind die einzelnen Schrittmotoren der Komponenten der Arbeitsstelle 2 über diverse Steuerleitungen an eine Steuerungsvorrichtung, im vorliegenden Ausführungsbeispiel an einen Arbeitsstellenrechner 19, angeschlossen. Dadurch sind die einzelmotorischen Antriebe der Komponenten der Arbeitsstellen 2 unabhängig voneinander ansteuerbar.
Das erfindungsgemäße Verfahren wird nachfolgend anhand der dargestellten Ausführungsbeispiele der Offenend-Rotorspinnmaschine beschrieben.As usual, the individual stepper motors of the components of the workstation 2 are connected via various control lines to a control device, in the present exemplary embodiment to a workstation computer 19. As a result, the individual motor drives of the components of the workstations 2 can be controlled independently of each other.
The inventive method will be described below with reference to the illustrated embodiments of the open-end rotor spinning machine.

Die Fadenwickelgeschwindigkeit einer Kreuzspule 8 ergibt sich aus der Drehzahl und dem Durchmesser der Spulenantriebswalze 10 sowie dem angetriebenen Durchmesser der Kreuzspule 8. Um einen gleichmäßigen Spulenaufbau zu gewährleisten, muss die Fadenwickelgeschwindigkeit der Spulvorrichtung 4 mit der Fadenführergeschwindigkeit der Fadenchangiereinrichtung 15 auf die Fadenliefergeschwindigkeit der Spinnvorrichtung 3 abgestimmt sein.The yarn winding speed of a cross-wound bobbin 8 results from the rotational speed and the diameter of the bobbin drive roller 10 and the driven diameter of the cheese 8. To ensure a uniform bobbin structure, the yarn winding speed of the winding device 4 must be matched with the yarn guide speed of the thread traversing device 15 to the yarn delivery speed of the spinning device 3 be.

Da bei konischen Kreuzspulen 8 der angetriebene Durchmesser der Kreuzspule 8 und der Durchmesser der Kreuzspule 8 im Fadenauflaufpunkt meistens nicht übereinstimmen und die Fadenwickelgeschwindigkeit der Spuleinrichtung 4 am kleinen Kreuzspulendurchmesser unter der Fadenliefergeschwindigkeit und am großen Kreuzspulendurchmesser über der Fadenliefergeschwindigkeit liegt, wird durch die erfindungsgemäßen Maßnahmen die Drehzahl der Spulenantriebswalze 10 einzelmotorisch 28 an den jeweiligen Antriebsdurchmesser angepasst, so dass die Zuführung des Fadens 7 bei konstanter Wickelspannung erfolgt. Somit kann sichergestellt werden, dass der Fadenspeicher 13 in der vorgegebenen Zeit geleert wird.
Bei einem Anspinnvorgang werden zunächst die Faserbandzufuhr, die Antriebe der Fadenabzugswalze 12, der Fadenchangiereinrichtung 15 sowie der Spulenantriebswalze 10 stillgesetzt und die herzustellende Kreuzspule 8 wird mittels des Spulenrahmens 9 von der Spulenantriebswalze 10 abgehoben. Anschließend wird ein Anspinnvorgang eingeleitet, wobei die Faserbandzufuhr, die Antriebe der Fadenabzugswalze 12, der Fadenchangiereinrichtung 15 sowie der Spulenantriebswalze 10 synchron zur Einleitung des Anspinnvorganges wieder in Betrieb genommen werden. Die Inbetriebnahme der Fadenabzugswalze 12, der Fadenchangiereinrichtung 15 sowie der Spulenantriebswalze 10 erfolgt dabei unter Berücksichtigung von zeitlich aufeinander abgestimmten Beschleunigungsvorgängen der einzelnen Antriebe, die vor allem den unterschiedlichen Massenträgheitsmomenten und dem Antriebsschlupf der in Betrieb zu nehmenden Komponenten Rechnung tragen sollen.Since with conical cheeses 8, the driven diameter of the cheese 8 and the diameter of the cheese 8 in the yarn feed point mostly do not match and the yarn winding speed of the winding device 4 is at the small cheese diameter at the yarn delivery speed and the large cheese diameter above the yarn delivery speed, the speed is by the inventive measures the bobbin drive roller 10 individual motor 28 adapted to the respective drive diameter, so that the supply of the yarn 7 takes place at a constant winding tension. Thus, it can be ensured that the thread store 13 is emptied in the predetermined time.
In a piecing process, first the sliver feed, the drives of the thread take-off roll 12, the Fadenchangiereinrichtung 15 and the bobbin drive roller 10 are stopped and the cheese to be produced 8 is lifted by means of the coil frame 9 of the bobbin drive roller 10. Subsequently, a piecing process is initiated, wherein the sliver feed, the drives of the thread take-off roll 12, the Fadenchangiereinrichtung 15 and the bobbin drive roller 10 are put into operation synchronously to initiate the piecing process again. The commissioning of the thread take-off roller 12, the Fadenchangiereinrichtung 15 and the bobbin drive roller 10 is carried out taking into account temporally coordinated acceleration processes of the individual drives, which should take into account in particular the different moments of inertia and the traction of the operating components to be taken into account.

Insbesondere nach einem Spulenwechsel und dem folgenden Anlegevorgang auf eine konische Leerhülse treten Schwankungen der axialen Lage des angetriebenen Durchmessers auf. Der Faden 7 wird besonders beim Spulen einer konischen Leerhülse durch den Fadenführer 15 ständig zwischen dem großen und kleinen Durchmesser der Kreuzspule 8 changiert. Diese Schwankung der Lage des angetriebenen Durchmessers hat zur Folge, dass die Wickelspannung des Fadens 7 ebenfalls schwankt und somit treten mögliche Fadenbrüche oder lockere Fadenlagen fast zwangsläufig auf.In particular, after a bobbin change and the subsequent application process to a conical empty tube, fluctuations of the axial position of the driven diameter occur. The thread 7 is particularly when rewinding a conical empty tube through the thread guide 15 constantly between the big and small diameter of the cheese 8 changes. This fluctuation of the position of the driven diameter has the consequence that the winding tension of the thread 7 also fluctuates and thus occur possible thread breaks or loose thread layers almost inevitably.

Zur Vermeidung dieser Effekte ist erfindungsgemäß vorgesehen, dass bereits vor einem Anlege- oder Anspinnvorgang die Drehimpulse der Kreuzspule 8 sensorisch erfasst werden, sowie aus der zeitlichen Abfolge der jeweilige Antriebsdurchmesser berechnet wird, um darauf basierend bereits zu Beginn der Spulenreise die Drehzahl der Spulenantriebswalze 10 zu wählen.To avoid these effects, the invention provides that the angular momenta of the cheese 8 are sensed before a piecing or piecing process, as well as from the time sequence of the respective drive diameter is calculated to based on it already at the beginning of the bobbin travel, the speed of the bobbin drive roller 10 choose.

Claims (4)

Verfahren zur Ermittlung der erforderlichen Drehzahl einer Spulenantriebswalze (10) beim Antreiben einer konischen Kreuzspule (8), die im Spulenrahmen (9) einer Arbeitsstelle (2) einer Kreuzspulen herstellenden Textilmaschine gehaltert ist, wobei der aufzuwindende Faden mittels einer Fadenabzugseinrichtung kontinuierlich zugeführt wird, und wobei die einzelmotorisch gesteuerte Spulenantriebswalze (10) der Arbeitsstelle (2) reibschlüssig die konische Kreuzspule (8) antreibt,
dadurch gekennzeichnet,
dass sensorisch Drehimpulse der Kreuzspule (8) erfasst werden, dass die zeitliche Abfolge der Drehimpulse gemessen wird, dass daraus der jeweilige Antriebsdurchmesser der konischen Kreuzspule (8) berechnet wird und dass die Drehzahl der Spulenantriebswalze (10) auf diesen Antriebsdurchmesser abgestimmt wird.A method for determining the required speed of a bobbin drive roller (10) when driving a conical cross-wound bobbin (8) which is held in the bobbin frame (9) of a workstation (2) of a cross-wound textile machine, wherein the thread to be wound is fed continuously by means of a thread take-off device, and wherein the single-motor-controlled bobbin drive roller (10) of the workstation (2) frictionally drives the conical cheese (8),
characterized,
in that sensory angular pulses of the cross-wound bobbin (8) are detected, that the time sequence of the rotational pulses is measured, that the respective drive diameter of the conical cross-wound bobbin (8) is calculated therefrom, and that the rotational speed of the bobbin drive roller (10) is tuned to this drive diameter. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Erfassung der Drehzahlimpulse vor einem Anlegevorgang an einer noch unbespulten Kreuzspule (8) erfolgt und dass der auf Basis der Abfolge der Drehimpulse errechnete Antriebsdurchmesser bereits beim Anlegevorgang der noch unbespulten Kreuzspule (8) der Wahl der angepassten Drehzahl der Spulenantriebswalze (10) zugrunde gelegt wird.A method according to claim 1, characterized in that the detection of the speed pulses takes place before an application process on a still unreeled cross-wound bobbin (8) and that the calculated on the basis of the sequence of angular momentes drive diameter already during the application process of the still unstrung cheese (8) the choice of adapted Speed of the coil drive roller (10) is used. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass mittels der Anpassung der Drehzahl der Spulenantriebswalze (10) an den Antriebsdurchmesser der Kreuzspule (8) diese Drehzahl während des Anspinnvorgangs so gesteuert wird, dass ein pneumatischer Fadenspeicher (13) der Arbeitsstelle (2) in der vorgegebenen Zeit entleert wird.A method according to claim 2, characterized in that by means of the adaptation of the rotational speed of the bobbin drive roller (10) to the drive diameter of the cross-wound bobbin (8), this speed is controlled during the piecing process so that a pneumatic yarn store (13) of the workstation (2) in the is emptied predetermined time. Arbeitsstelle (2) einer Kreuzspulen herstellenden Textilmaschine zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass jede Arbeitsstelle (2) eine Einrichtung (31) aufweist, die sensorisch die Impulse der auf der Spulenantriebswalze (10) rotierenden Hülse bzw. Kreuzspule (8) erfasst und an eine Steuereinrichtung (32) weiterleitet, die aus der zeitlichen Abfolge der Impulse den daraus resultierenden Antriebsdurchmesser der Hülse bzw. Kreuzspule (8) sowie daraus resultierend die auf den Antriebsdurchmesser angepasste Drehzahl der Spulenantriebswalze (10) berechnet.Workstation (2) of a textile machine producing cross-wound bobbins for carrying out the method according to claim 1, characterized in that each workstation (2) has a device (31) which sensorially senses the pulses of the sleeve or cross-wound bobbin (8) rotating on the bobbin drive roller (10) ) and forwarded to a control device (32) which calculates from the time sequence of the pulses the resulting drive diameter of the sleeve or cross-wound bobbin (8) and, as a result, the rotational speed of the bobbin drive roller (10) adapted to the drive diameter.
EP13000107.6A 2012-02-09 2013-01-10 Method and device for determining the necessary speed of rotation of a coil drive roller Active EP2626324B1 (en)

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TR201819297T4 (en) 2019-01-21
DE102012002579A1 (en) 2013-08-14
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CN103241588A (en) 2013-08-14
EP2626324A3 (en) 2014-09-03

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