EP1067224B1 - Method and device for monitoring the quality of yarns - Google Patents

Method and device for monitoring the quality of yarns Download PDF

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Publication number
EP1067224B1
EP1067224B1 EP99113196A EP99113196A EP1067224B1 EP 1067224 B1 EP1067224 B1 EP 1067224B1 EP 99113196 A EP99113196 A EP 99113196A EP 99113196 A EP99113196 A EP 99113196A EP 1067224 B1 EP1067224 B1 EP 1067224B1
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EP
European Patent Office
Prior art keywords
speed
monitoring
local
computer
sensors
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EP99113196A
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German (de)
French (fr)
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EP1067224A1 (en
Inventor
Michael Paul Dr. Witzak
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SSM Schaerer Schweiter Mettler AG
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SSM Schaerer Schweiter Mettler AG
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Priority to EP99113196A priority Critical patent/EP1067224B1/en
Priority to AT99113196T priority patent/ATE258241T1/en
Priority to DE59908371T priority patent/DE59908371D1/en
Publication of EP1067224A1 publication Critical patent/EP1067224A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/10—Tension devices
    • D01H13/108—Regulating tension by regulating speed of driving mechanisms of unwinding, paying-out, forwarding, winding or depositing devices, e.g. automatically in response to variations in tension
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams

Definitions

  • the invention is in the field of quality monitoring of yarns, which are so-called Suppliers are led, such as those in rewinding machines, Umwirbetungsmaschinen, Texturing machines and stretching machines are used.
  • the individual axes are heated and are referred to as godets.
  • One of the tasks of the single axes is, for example, the decoupling of pull-off voltages of winding units from the actual winding tension, the individual axes have several, preferably two to ten yarn loops, depending on the type of yarn and the number of wraps the slip between the yarn and the surface of the single axis certainly.
  • the invention relates to a device for quality monitoring of yarns on textile machines, which has several motor-driven single axes, a central spindle computer, one take-up unit and one drive motor each controlled by the central spindle computer for each individual axis.
  • each individual axis is at least a sensor for the speed of the drive motor and a local computer are assigned is to which the signals of the at least one sensor are fed for processing that a motor-internal sensor is provided for monitoring the current drawn, and that the signals from the two sensors are compared in the local computers.
  • a first preferred embodiment of the device according to the invention is characterized in that that a constant on-line regulation of the delay and delivery of the individual individual axes certain thread tension ratios.
  • a second preferred embodiment is characterized in that a separate detection the speed and the momentary load of each individual axis.
  • the acquisition is carried out redundantly and is carried out by two mutually controlling Sensors.
  • a third preferred embodiment of the device according to the invention is characterized in that that the local computers are connected to the central spindle computer, and that based on the monitoring of the speeds and that recorded by the drive motors Electricity monitoring of sensors, electrical connections, computers and drive motors existing signal chain, with each error on any Make a detectable fluctuation in the running speed and / or fluctuation in the system effected by a drive motor current.
  • Another preferred embodiment is characterized in that the connection between the local computers and the central spindle computer via a bus system, and that the local computers are monitored by the spindle computer.
  • the individual axes are preferably controlled synchronously with the speed of the winding unit.
  • decentralized or local regulation and Monitoring of the individual supply plants whereby supply plant controls are provided are, in addition to the actual engine control, the function of monitoring the Take over the running behavior of the supplying plants.
  • the latter guarantees that every meter of yarn is included monitored voltage relationships is processed. Because the game tension to the most important Belongs to process parameters, this guarantees perfect yarn quality.
  • the invention further relates to a use of the device mentioned for air swirling and / or Texturing machines.
  • the inventive use of the device is thereby characterized that the individual axes form supplying plants of the machines mentioned, which are controlled based on the local monitoring by the sensors mentioned.
  • a first preferred embodiment of the use according to the invention is characterized in that that the yarn tension is checked during local monitoring.
  • a second preferred embodiment of the use according to the invention is characterized in that that the speed of each individual axis is measured to monitor the game voltage and compared with a target value and that of each drive motor of the drive rollers supplied current is monitored.
  • a third preferred embodiment of the use according to the invention is characterized in that that the momentary load of each individual axis is recorded separately, whereby via the current flowing current for regulating a control error to the current load torque is calculated back.
  • a fourth preferred embodiment of the use according to the invention is characterized in that that the entire chain of signal acquisition and signal transmission from the sensor up to which the computer evaluating the sensor signals is monitored.
  • Fig. 1 is an example to explain the function of delivery plants or individual axes Thread run in an air swirling machine for high and highest production speeds shown.
  • air swirling machines are about an endless elastane thread with one or more filament or staple fiber or customer specific To combine mixed forms of such yarns.
  • a yarn A drawn off from a template runs over a deflection roller 1 to a first delivery plant L 1 and, depending on the respective process, loops around it with a specific number of loops.
  • the yarn A can be a single filament or staple thread, but several threads can also be put together.
  • the yarn A is led from the first supply plant L 1 to a second supply plant L 2 .
  • a thread B which is usually a special thread, for example an elastane thread, is drawn off from a template (not shown) by a third delivery unit L 3 and fed to the second delivery unit L 2 and picked up there with a number of wraps.
  • the two yarns A and B arrive in a process section 2, in which the air swirl takes place.
  • the yarn created by the air swirling is led via a fourth delivery unit L 4 to a winding unit 3.
  • the number of wraps depends on the process, ie on the yarn, on the intermingling quality to be achieved and on the process speed.
  • the function of the supplying plants is defined by their position in the thread run.
  • the first delivery unit L 1 together with the deflection roller 1, has the task of eliminating those thread tension fluctuations in the yarn A which arise due to the balloon tension of the template. In addition to these noticeably periodic fluctuations, there is a steady increase in voltage due to the decreasing diameter of the template. Both effects are eliminated by the delivery unit L 1 in connection with the deflection roller 1, so that the yarn A supplied to the delivery unit L 2 is calmed.
  • the yarn can be "drawn". This means that you deliver with the delivery plant L 1 and deliver with the delivery plant L 2 . In relation to the speed of the delivery plant L 4, this means that L 1 is driven somewhat slower and L 2 somewhat faster than L 4 . Thus the yarn A is stretched between L 1 and L 2 and stretched between L 2 and L 4 .
  • the delivery plant L 4 determines the overall elastane warping, the size of which depends on the desired final quality of the yarn; Common elastane distortions are in the range from 1: 1.3 to 1: 4.
  • the delivery mechanisms L 1 to L 4 are controlled electronically in synchronism with the speed of the winding unit 3, the regulation being programmed on decentralized control computers (FIG. 2).
  • Fig. 2 shows a schematic representation of the structure of the control and monitoring of the delivery systems of an air swirling machine.
  • four delivery systems L 1 to L 4 are shown, each having a drive motor M 1 to M 4 and a spindle S 1 to S 4 driven by the latter.
  • Each of the delivery plants L 1 to L 4 is assigned a local control computer or processor P 1 to P 4 , to which sensor signals are supplied on the one hand via lines 4 and 5 and which on the other hand outputs a control signal to the motor M 1 to M 4 via a line 6.
  • the processors are connected to a central spindle computer 8 via a bus 7.
  • the elastane warpage is of considerable influence for the quality of the end product produced by process 2. Since the elastane warpage is determined by the speed and speed ratio of the supplying plants L 1 to L 4 , the quality of the elastane gas depends primarily on the speed of the supplying plants L 1 to L 4 . These speeds are measured on the one hand via encoders in the motors M 1 to M 4 and fed to the processors P 1 to P 4 via the lines 4. On the other hand, an external speed detection is additionally provided, which is used to monitor the angular accuracy and is fed to the processors P 1 to P 4 via the lines 5.
  • the internal encoders measure the current supplied to the motors and the actual speed is compared with the target speed in the processors and the flowing current is monitored. In the event of speed deviations, the current is increased accordingly or the braking effect is increased. If the current or the power consumed becomes too high, the motor in question is switched off.
  • the processors continuously evaluate this speed information on-line and thereby monitor the runtime behavior of the supplying plants L 1 to L 4 .
  • the spindle computer 8 delivers the warping and the corresponding target speeds to the individual delivery plants L 1 to L 4 , warping always meaning speed differences of the delivery plants with respect to one another and relative to the winding unit 3.
  • the spindle computer 8 defines the deviation of the speed of each delivery mechanism from the spindle speed, the thread tension decreasing at a higher speed of a delivery mechanism and increasing at a lower speed.
  • the delivery units L 1 to L 4 are continuously electronically controlled synchronously with the speed of the winding unit 3, the regulation being programmed on the local control computers P 1 to P 4 . Since each supplier has its own computer and sensors, each supplier can be monitored separately. In addition, the control computers work with redundant information by measuring the number of revolutions on the one hand in the motors M 1 to M 4 and on the other hand externally. Both speed information are continuously evaluated online so that the runtime behavior of the drives is monitored online. All control and monitoring is done digitally.
  • the individual components of the entire device act in this on-line control of Thread tension or the tension of the thread mixture in the process (air turbulence, texturing or stretching the yarn) together to guarantee perfect yarn quality. It is important that the signal chain (Fig. 2) is completely monitored and that every meter Yarn is processed under monitored tension. Because the game tension is one of the most important in these processes, along with yarn speed and air pressure Process parameters.
  • the signal chain consists of sensors, electrical connections (cables with contacts), computers and motors. If an error occurs at any point in the signal chain, this is expressed as a system error which causes a fluctuation in the speed of the supplying plant in question, which is recorded in the associated control computer. Such a system error would be, for example, a permanent, non-controllable control deviation due to contact problems (leakage currents) or a sensor malfunction. In this way, the entire chain of signal acquisition and transmission from the individual sensor to the spindle computer is monitored.
  • the main property of the described device for quality monitoring is that the delivery control systems take on the function of monitoring the running behavior of the delivery plants L 1 to L 4 in addition to the function of the actual engine control, and that this running behavior enables clear conclusions to be drawn about a whole number of potential sources of error .
  • Monitoring of the running behavior of the supplying plants is made possible by the sensors and the decentralized computers. In the event of a malfunction or overload due to incorrect settings, the process is immediately intervened and the workstation in question is shut down.
  • the device described in addition to the regulation and monitoring of the supplying plants also statistical evaluations to determine the frequency of failure and to monitor service life be made.
  • the digital and decentralized control and monitoring enables the parameterization of the individual delivery plants with a central operating computer.
  • the use of the device in air swirling processes leads to high quality and reproducibility, the application in stretching processes leads to a very uniform Guaranteed quality yarn.
  • Effect games are produced,

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

A yarn processing machine has a number of rolls (L1 to L4), each driven by its own motor (M1 to M4). The performance of each motor is measured (4,5) and controlled (6) by sensors through a local computer (P1 to P4) to monitor yarn quality. The computers (P1 to P4) are linked with a bus (7) to a central unit (8).

Description

Die Erfindung liegt auf dem Gebiet der Qualitätsüberwachung von Garnen, welche über sogenannte Lieferwerke geführt sind, wie sie beispielsweise in Umspulmaschinen, Umwirbetungsmaschinen, Texturiermaschinen und Streckmaschinen verwendet werden.The invention is in the field of quality monitoring of yarns, which are so-called Suppliers are led, such as those in rewinding machines, Umwirbetungsmaschinen, Texturing machines and stretching machines are used.

In diesen Maschinen wird eine unterschiedliche Anzahl von Lieferwerken oder allgemein Einzelachsen eingesetzt, die verschiedene Aufgaben im Fadenlauf erfüllen. Im Fall von Texturiermaschinen oder Streckmaschinen sind die Einzelachsen beheizt und werden als Galetten bezeichnet. Eine der Aufgaben der Einzelachsen besteht beispielsweise in der Entkopplung von Abzugsspannungen von Spulvorlagen von der eigentlichen Aufwickelspannung, wobei die Einzelachsen je nach Garnart mehrere, vorzugsweise zwei bis zehn Garnumschlingungen aufweisen und die Anzahl der Umschlingungen den Schlupf zwischen Garn und Oberfläche der Einzelachse bestimmt.In these machines there is a different number of delivery plants or generally single axes used that perform various tasks in the thread course. In the case of texturing machines or stretching machines, the individual axes are heated and are referred to as godets. One of the tasks of the single axes is, for example, the decoupling of pull-off voltages of winding units from the actual winding tension, the individual axes have several, preferably two to ten yarn loops, depending on the type of yarn and the number of wraps the slip between the yarn and the surface of the single axis certainly.

Bis in die jüngste Vergangenheit wurden von einem zentralen Motor über Transmissionsriemen angetriebene Einzelachsen verwendet, bei denen wegen der nahezu schlupffreien Kraftübertragung die Synchronisation unter den einzelnen Einzelachsen weitgehend gewährleistet ist. Da aber weder eine Überwachung der resultierenden Drehzahl noch eine solche der Transmissionsriemen erfolgt, können Riemenbrüche, Spannungsschwankungen des Garns oder andere Fehlfunktionen in der Regel nicht erkannt werden. Da ausserdem zwischen den einzelnen Einzelachsen wegen der Transmissionsriemen und Riemenscheiben ein festes Übersetzungsverhäitnis besteht, können unterschiedliche Verzüge nur durch Auswechseln von Riemen und Riemenscheiben eingestellt werden. Diese mangelnde Flexibilität hinsichtlich der Einstellung der Verzüge ist ein gravierender Nachteil des Antriebs mittels eines Zentralmotors.In the recent past, there was a central engine via transmission belts driven single axles used, because of the almost slip-free power transmission synchronization between the individual axes is largely guaranteed. There but neither a monitoring of the resulting speed nor of the transmission belts belt breaks, tension fluctuations in the yarn or others Malfunctions are usually not recognized. Since also between the individual axes because of the transmission belts and pulleys, a fixed ratio different distortions can only be achieved by changing the belt and pulleys can be set. This lack of flexibility in terms of hiring Warping is a serious disadvantage of the drive using a central motor.

Neuerdings werden einzeln angetriebene Einzelachsen oder Lieferwerke verwendet, die von einem zentralen Steuerrechner geregelt werden. Die Synchronisation erfolgt hier über ein Leitsignal und es ist eine Folgeregelung vorgesehen, welche die Drehzahl der Lieferwerke ständig dem Leitwert nachführt. Etwaige lokale Abweichungen und Unregelmässigkeiten werden aber bei diesen einzeln angetriebenen Lieferwerken nicht erfasst und können daher bei der Drehzahlregelung nicht berücksichtigt werden. Nachregelungen der Drehzahl von Antriebsmotoren der Einzelachsen sind bei Streckwerken bekannt (siehe beispielsweise EP=A-0 466 049, WO-A-92/22691 ), wobei die Stellgrösse für die Motordrehzahlen durch den Querschnitt des erzeugten Bandes gebildet ist. Recently individually driven single axles or delivery systems have been used by be controlled by a central control computer. The synchronization takes place here via a master signal and a follow-up control is provided which keeps the speed of the supplying plants constant tracks the conductance. Any local deviations and irregularities will, however not recorded in these individually driven delivery plants and can therefore be used in speed control are not taken into account. Readjustments of the speed of drive motors the individual axes are known in drafting systems (see, for example, EP = A-0 466 049, WO-A-92/22691 ), whereby the manipulated variable for the engine speed by the cross section of the generated Band is formed.

Diese bekannten Vorrichtungen sollen nun durch die vorliegende Erfindung so verbessert werden, dass-eine on-line Kontrolle des Garns in den einzelnen Lieferwerken möglich wird.These known devices are now intended to be improved by the present invention - that on-line control of the yarn is possible in the individual supply plants.

Die Erfindung betrifft eine Vorrichtung zur Qualitätsüberwachung von Garnen auf Textilmaschinen, welche mehrere motorisch angetriebene Einzelachsen, einen zentralen Spindelrechner, ein Aufwickelaggregat und je einen vom zentralen Spindelrechner gesteuerten Antriebsmotor für jede Einzelachse aufweisen.The invention relates to a device for quality monitoring of yarns on textile machines, which has several motor-driven single axes, a central spindle computer, one take-up unit and one drive motor each controlled by the central spindle computer for each individual axis.

Die erfindungsgemässe Vorrichtung ist dadurch gekennzeichnet, dass jeder Einzelächse mindestens ein Sensor für die Drehzahl des Antriebsmotors sowie ein lokaler Rechner zugeordnet ist, welchem die Signale des mindestens einen Sensors zur Verarbeitung zugeführt sind, dass ein motorintemer Sensor zur Überwachung des abgenommenen Stroms vorgesehen ist, und dass in den lokalen Rechnern ein Vergleich der Signale der beiden Sensoren erfolgt.The device according to the invention is characterized in that each individual axis is at least a sensor for the speed of the drive motor and a local computer are assigned is to which the signals of the at least one sensor are fed for processing that a motor-internal sensor is provided for monitoring the current drawn, and that the signals from the two sensors are compared in the local computers.

Eine erste bevorzugte Ausführungsform der erfindungsgemässen Vorrichtung ist dadurch gekennzeichnet, dass eine ständige on-line Regelung der durch den Verzug und die Überlieferung der einzelnen Einzelachsen bestimmten Fadenspannungsverhältnisse erfolgt.A first preferred embodiment of the device according to the invention is characterized in that that a constant on-line regulation of the delay and delivery of the individual individual axes certain thread tension ratios.

Eine zweite bevorzugte Ausführungsform ist dadurch gekennzeichnet, dass eine separate Erfassung der Drehzahl und der Momentanbelastung jeder Einzelachse erfolgt. Vorzugsweise ist die Erfassung redundant ausgeführt und erfolgt durch zwei einander gegenseitig kontrollierende Sensoren.A second preferred embodiment is characterized in that a separate detection the speed and the momentary load of each individual axis. Preferably the acquisition is carried out redundantly and is carried out by two mutually controlling Sensors.

Eine dritte bevorzugte Ausführungsform der erfindungsgemässen Vorrichtung ist dadurch gekennzeichnet, dass die lokalen Rechner mit dem zentralen Spindelrechner verbunden sind, und dass anhand der Überwachung der Drehzahlen und des von den Antriebsmotoren aufgenommenen Stroms eine Überwachung der aus Sensoren, elektrischen Verbindungen, Rechnern und Antriebsmotoren bestehenden Signalkette erfolgt, wobei jeder Fehler an einer beliebigen Stelle im System eine erfassbare Laufschwankung einer Drehzahl und/oder Schwankung des von einem Antriebsmotor aufgenommenen Stroms bewirkt.A third preferred embodiment of the device according to the invention is characterized in that that the local computers are connected to the central spindle computer, and that based on the monitoring of the speeds and that recorded by the drive motors Electricity monitoring of sensors, electrical connections, computers and drive motors existing signal chain, with each error on any Make a detectable fluctuation in the running speed and / or fluctuation in the system effected by a drive motor current.

Eine weitere bevorzugte Ausführungsform ist dadurch gekennzeichnet, dass die Verbindung zwischen den lokalen Rechnern und dem zentralen Spindelrechner über ein Bussystem erfolgt, und dass die lokalen Rechner vom Spindelrechner überwacht sind.Another preferred embodiment is characterized in that the connection between the local computers and the central spindle computer via a bus system, and that the local computers are monitored by the spindle computer.

Vorzugsweise sind die Einzelachsen synchron zur Drehzahl des Aufwickelaggregats geregelt.The individual axes are preferably controlled synchronously with the speed of the winding unit.

Bei der erfindungsgemässen Vorrichtung erfolgt also eine dezentrale oder lokale Regelung und Überwachung der einzelnen Lieferwerke (Einzelachsen), wobei Lieferwerksteuerungen vorgesehen sind, die zusätzlich zur eigentlichen Motorenregelung die Funktion der Überwachung des Laufverhaltens der Lieferwerke übernehmen. Letzteres garantiert, dass jeder Meter Garn mit überwachten Spannungsverhäitnissen bearbeitet wird. Da die Gamspannung zu den wichtigsten Prozessparametern gehört, ist dadurch eine einwandfreie Garnqualität gewährleistet. In the device according to the invention, decentralized or local regulation and Monitoring of the individual supply plants (single axes), whereby supply plant controls are provided are, in addition to the actual engine control, the function of monitoring the Take over the running behavior of the supplying plants. The latter guarantees that every meter of yarn is included monitored voltage relationships is processed. Because the game tension to the most important Belongs to process parameters, this guarantees perfect yarn quality.

Die Erfindung betrifft weiter eine Verwendung der genannten Vorrichtung an Luftverwirbelungsund/oder Texturiermaschinen. Die erfindungsgemässe Verwendung der Vorrichtung ist dadurch gekennzeichnet, dass die Einzelachsen Lieferwerke der genannten Maschinen bilden, welche anhand der lokalen Überwachung durch die genannten Sensoren gesteuert sind.The invention further relates to a use of the device mentioned for air swirling and / or Texturing machines. The inventive use of the device is thereby characterized that the individual axes form supplying plants of the machines mentioned, which are controlled based on the local monitoring by the sensors mentioned.

Eine erste bevorzugte Ausführungsform der erfindungsgemässen Verwendung ist dadurch gekennzeichnet, dass bei der lokalen Überwachung eine Kontrolle der Garnspannung erfolgt.A first preferred embodiment of the use according to the invention is characterized in that that the yarn tension is checked during local monitoring.

Eine zweite bevorzugte Ausführungsform der erfindungsgemässen Verwendung ist dadurch gekennzeichnet, dass zur Überwachung der Gamspannung die Drehzahl jeder Einzelachse gemessen und mit einem Sollwert verglichen, und dass der jedem Antriebsmotor der Antriebsrollen zugeführte Strom überwacht wird.A second preferred embodiment of the use according to the invention is characterized in that that the speed of each individual axis is measured to monitor the game voltage and compared with a target value and that of each drive motor of the drive rollers supplied current is monitored.

Eine dritte bevorzugte Ausführungsform der erfindungsgemässen Verwendung ist dadurch gekennzeichnet, dass die Momentanbelastung jeder Einzelachse separat erfasst wird, wobei über den aktuell fliessenden Strom zur Ausregelung eines Regelfehlers auf das aktuelle Lastmoment rückgerechnet wird.A third preferred embodiment of the use according to the invention is characterized in that that the momentary load of each individual axis is recorded separately, whereby via the current flowing current for regulating a control error to the current load torque is calculated back.

Eine vierte bevorzugte Ausführungsform der erfindungsgemässen Verwendung ist dadurch gekennzeichnet, dass die gesamte Kette der Signalerfassung und Signalübermittlung vom Sensor bis zu dem die Sensorsignale auswertenden Rechner überwacht wird.A fourth preferred embodiment of the use according to the invention is characterized in that that the entire chain of signal acquisition and signal transmission from the sensor up to which the computer evaluating the sensor signals is monitored.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels und der Zeichnungen näher erläutert; es zeigt:

  • Fig. 1 eine schematische Darstellung des Fadenlaufs in einer Luftverwirbelungsmaschine; und
  • Fig. 2 eine schematische Darstellung der Regelung und Überwachung der Lieferwerke einer Luftverwirbelungsmaschine.
    • In the following the invention is explained in more detail using an exemplary embodiment and the drawings; it shows:
  • Figure 1 is a schematic representation of the thread path in an air interlacing machine. and
  • Fig. 2 is a schematic representation of the control and monitoring of the delivery mechanisms of an air swirling machine.

    • In Fig. 1 ist zur Erläuterung der Funktion von Lieferwerken oder Einzelachsen ein beispielhafter Fadenlauf in einer Luftverwirbelungsmaschine für hohe und höchste Produktionsgeschwindigkeiten dargestellt. Bezüglich derartiger Maschinen wird auf die europäischen Patentanmeldungen Nr. 99 106 310.8 und 99 109 917.7 der Anmelderin der vorliegenden Patentanmeldung verwiesen. Grundsätzlich geht es bei Luftverwirbelungsmaschinen darum, einen Endlos-Elastanfaden mit einem oder mehreren Filament- oder Stapelfasergamen oder kundenspezifischen Mischformen solcher Garne zu verbinden.In Fig. 1 is an example to explain the function of delivery plants or individual axes Thread run in an air swirling machine for high and highest production speeds shown. With regard to such machines, reference is made to the European patent applications Nos. 99 106 310.8 and 99 109 917.7 of the applicant of the present patent application directed. Basically, air swirling machines are about an endless elastane thread with one or more filament or staple fiber or customer specific To combine mixed forms of such yarns.

    Gemäss Fig. 1 läuft ein von einer Vorlage (nicht dargestellt) abgezogenes Garn A über eine Umlenkrolle 1 zu einem ersten Lieferwerk L1 und umschlingt dieses in Abhängigkeit vom jeweiligen Prozess mit einer bestimmten Anzahl von Umschlingungen. Das Garn A kann ein einzelner Filament- oder Stapelfaden sein, es können aber auch mehrere Fäden zusammengenommen werden. Vom ersten Lieferwerk L1 ist das Garn A zu einem zweiten Lieferwerk L2 geführt. According to FIG. 1, a yarn A drawn off from a template (not shown) runs over a deflection roller 1 to a first delivery plant L 1 and, depending on the respective process, loops around it with a specific number of loops. The yarn A can be a single filament or staple thread, but several threads can also be put together. The yarn A is led from the first supply plant L 1 to a second supply plant L 2 .

    Ein Faden B, der in der Regel ein spezieller Faden, beispielsweise ein Elastanfaden ist, wird von einem dritten Lieferwerk L3 von einer Vorlage (nicht dargestellt) abgezogen und dem zweiten Lieferwerk L2 zugeführt und auf diesem mit einer Anzahl von Umschlingungen aufgenommen. Vom Lieferwerk L2 gelangen die beiden Garne A und B in eine Prozessstrecke 2, in welcher die Luftverwirbelung erfolgt. Nach der Prozessstrecke 2 ist das durch die Luftverwirbelung entstandene Garn über ein viertes Lieferwerk L4 zu einem Aufwickelaggregat 3 geführt. Auch beim Lieferwerk L4 ist die Anzahl der Umschlingungen prozessabhängig, d.h. abhängig vom Garn, von der zu erreichenden Verwirbelungsqualität und von der Prozessgeschwindigkeit. Die Funktion der Lieferwerke ist durch ihre Position im Fadenlauf definiert. Das erste Lieferwerk L1 hat zusammen mit der Umlenkrolle 1 die Aufgabe, diejenigen Fadenspannungsschwankungen im Garn A zu eliminieren, die aufgrund der Ballonspannung der Vorlage entstehen. Zu diesen merklich periodischen Schwankungen kommt noch eine stetige Spannungszunahme aufgrund des abnehmenden Durchmessers der Vorlage. Beide Effekte werden durch das Lieferwerk L1 in Verbindung mit der Umlenkrolle 1 beseitigt, so dass das dem Lieferwerk L2 zugeführte Garn A beruhigt ist.A thread B, which is usually a special thread, for example an elastane thread, is drawn off from a template (not shown) by a third delivery unit L 3 and fed to the second delivery unit L 2 and picked up there with a number of wraps. From the delivery plant L 2 , the two yarns A and B arrive in a process section 2, in which the air swirl takes place. After the process section 2, the yarn created by the air swirling is led via a fourth delivery unit L 4 to a winding unit 3. In the delivery plant L 4 , too, the number of wraps depends on the process, ie on the yarn, on the intermingling quality to be achieved and on the process speed. The function of the supplying plants is defined by their position in the thread run. The first delivery unit L 1 , together with the deflection roller 1, has the task of eliminating those thread tension fluctuations in the yarn A which arise due to the balloon tension of the template. In addition to these noticeably periodic fluctuations, there is a steady increase in voltage due to the decreasing diameter of the template. Both effects are eliminated by the delivery unit L 1 in connection with the deflection roller 1, so that the yarn A supplied to the delivery unit L 2 is calmed.

    Durch Variation des Drehzahlverhältnisses zwischen den Lieferwerken L1 und L2 in bestimmten Grenzen kann das Garn "verstreckt" werden. Das bedeutet, dass man mit dem Lieferwerk L1 unterliefert und mit dem Lieferwerk L2 überliefert. Bezogen auf die Drehzahl des Lieferwerks L4 bedeutet das, dass L1 etwas langsamer und L2 etwas schneller angetrieben wird als L4. Damit wird das Garn A zwischen L1 und L2 gespannt und zwischen L2 und L4 enspannt.By varying the speed ratio between the delivery units L 1 and L 2 within certain limits, the yarn can be "drawn". This means that you deliver with the delivery plant L 1 and deliver with the delivery plant L 2 . In relation to the speed of the delivery plant L 4, this means that L 1 is driven somewhat slower and L 2 somewhat faster than L 4 . Thus the yarn A is stretched between L 1 and L 2 and stretched between L 2 and L 4 .

    Das Lieferwerk L4 bestimmt somit im Zusammenwirken mit den Lieferwerken L2 und L3 den Elastanverzug insgesamt, dessen Grösse von der gewünschten Endqualität des Garns abhängt; gängige Elastanverzüge liegen im Bereich von 1:1,3 bis 1:4. Die Lieferwerke L1 bis L4 werden synchron zur Drehzahl des Aufwickelaggregats 3 elektronisch geregelt, wobei die Regelung auf dezentralen Steuerungsrechnem (Fig. 2) programmiert ist.In cooperation with the supplying plants L 2 and L 3, the delivery plant L 4 thus determines the overall elastane warping, the size of which depends on the desired final quality of the yarn; Common elastane distortions are in the range from 1: 1.3 to 1: 4. The delivery mechanisms L 1 to L 4 are controlled electronically in synchronism with the speed of the winding unit 3, the regulation being programmed on decentralized control computers (FIG. 2).

    Fig. 2 zeigt eine schematische Darstellung des Aufbaus der Regelung und Überwachung der Lieferwerke einer Luftverwirbelungsmaschine. In der Figur sind vier Lieferwerke L1 bis L4 dargestellt, welche je einen Antriebsmotor M1 bis M4 und eine von diesem angetriebene Spindel S1 bis S4 aufweisen. Jedem der Lieferwerke L1 bis L4 ist ein lokaler Steuerungsrechner oder Prozessor P1 bis P4 zugeordnet, welchem einerseits über Leitungen 4 und 5 Sensorsignale zugeführt sind und welcher andererseits über eine Leitung 6 an den Motor M1 bis M4 ein Ansteuersignal abgibt. Die Prozessoren sind Ober einen Bus 7 mit einem zentralen Spindelrechner 8 verbunden.Fig. 2 shows a schematic representation of the structure of the control and monitoring of the delivery systems of an air swirling machine. In the figure, four delivery systems L 1 to L 4 are shown, each having a drive motor M 1 to M 4 and a spindle S 1 to S 4 driven by the latter. Each of the delivery plants L 1 to L 4 is assigned a local control computer or processor P 1 to P 4 , to which sensor signals are supplied on the one hand via lines 4 and 5 and which on the other hand outputs a control signal to the motor M 1 to M 4 via a line 6. The processors are connected to a central spindle computer 8 via a bus 7.

    Wie aus der Beschreibung von Fig. 1 hervorgeht, ist für die Qualität des durch den Prozess 2 hergestellten Endprodukts der Elastanverzug von wesentlichem Einfluss. Da der Elastanverzug durch die Drehzahlen und Drehzahlverhältnisse der Lieferwerke L1 bis L4 bestimmt ist, ist die Qualität des Elastangams in erster Linie von der Drehzahlen der Lieferwerke L1 bis L4 abhängig. Diese Drehzahlen werden einerseits über Encoder in den Motoren M1 bis M4 gemessen und den Prozessoren P1 bis P4 über die Leitungen 4 zugeführt. Andererseits ist zusätzlich eine exteme Drehzahlerfassung vorgesehen, die der Überwachung der Winkelgenauigkeit dient und den Prozessoren P1 bis P4 über die Leitungen 5 zugeführt ist. Die motorinternen Encoder messen den den Motoren zugeführten Strom und in den Prozessoren wird die Ist-Drehzahl mit der Soll-Drehzahl verglichen und der fliessende Strom überwacht. Bei Drehzahlabweichungen wird der Strom entsprechend erhöht oder die Bremswirkung verstärkt. Wenn dabei der Strom oder die aufgenommene Leistung zu hoch wird, wird der betreffende Motor abgestellt.As can be seen from the description of FIG. 1, the elastane warpage is of considerable influence for the quality of the end product produced by process 2. Since the elastane warpage is determined by the speed and speed ratio of the supplying plants L 1 to L 4 , the quality of the elastane gas depends primarily on the speed of the supplying plants L 1 to L 4 . These speeds are measured on the one hand via encoders in the motors M 1 to M 4 and fed to the processors P 1 to P 4 via the lines 4. On the other hand, an external speed detection is additionally provided, which is used to monitor the angular accuracy and is fed to the processors P 1 to P 4 via the lines 5. The internal encoders measure the current supplied to the motors and the actual speed is compared with the target speed in the processors and the flowing current is monitored. In the event of speed deviations, the current is increased accordingly or the braking effect is increased. If the current or the power consumed becomes too high, the motor in question is switched off.

    Die Prozessoren werten diese Drehzahlinformationen ständig on-line aus und überwachen dadurch das Laufzeitverhalten der Lieferwerke L1 bis L4. Der Spindelrechner 8 liefert die Verzüge und die entprechenden Soll-Drehzahlen an die einzelnen Lieferwerke L1 bis L4, wobei Verzüge immer Drehzahlunterschiede der Lieferwerke untereinander und relativ zum Aufwickeiaggregat 3 bedeuten. Der Spindelrechner 8 definiert die Abweichung der Drehzahl jedes Lieferwerks von der Spindeldrehzahl, wobei gilt, dass die Fadenspannung bei höherer Drehzahl eines Lieferwerks sinkt und bei geringerer Drehzahl steigt.The processors continuously evaluate this speed information on-line and thereby monitor the runtime behavior of the supplying plants L 1 to L 4 . The spindle computer 8 delivers the warping and the corresponding target speeds to the individual delivery plants L 1 to L 4 , warping always meaning speed differences of the delivery plants with respect to one another and relative to the winding unit 3. The spindle computer 8 defines the deviation of the speed of each delivery mechanism from the spindle speed, the thread tension decreasing at a higher speed of a delivery mechanism and increasing at a lower speed.

    Die Lieferwerke L1 bis L4 werden synchron zur Drehzahl des Aufwickelaggregats 3 ständig elektronisch geregelt, wobei die Regelung auf den lokalen Steuerungsrechnem P1 bis P4 programmiert ist. Da jedes Lieferwerk einen eigenen Rechner und eigene Sensoren besitzt, kann jedes Lieferwerk separat überwacht werden. Zusätzlich arbeiten die Steuerungsrechner mit redundanten Informationen, indem die Messung der Umdrehungszahl einerseits in den Motoren M1 bis M4 und anderseits extern erfolgt. Beide Drehzahlinformationen werden ständig on-line ausgewertet, so dass das Laufzeitverhalten der Laufwerke on-line überwacht wird. Die gesamte Regelung und Überwachung erfolgt digital.The delivery units L 1 to L 4 are continuously electronically controlled synchronously with the speed of the winding unit 3, the regulation being programmed on the local control computers P 1 to P 4 . Since each supplier has its own computer and sensors, each supplier can be monitored separately. In addition, the control computers work with redundant information by measuring the number of revolutions on the one hand in the motors M 1 to M 4 and on the other hand externally. Both speed information are continuously evaluated online so that the runtime behavior of the drives is monitored online. All control and monitoring is done digitally.

    Die einzelnen Komponenten der gesamten Vorrichtung wirken bei dieser on-line Kontrolle der Fadenspannung oder der Spannung des Fadengemisches im Prozess (Luftverwirbelung, Texturieren oder Verstrecken des Garns) zusammen, um eine einwandfreie Garnqualität zu garantieren. Dabei ist wichtig, dass die Signalkette (Fig. 2) komplett überwacht und dass jeder Meter Garn unter überwachten Spannungsverhältnissen bearbeitet wird. Denn die Gamspannung gehört bei diesen Prozessen neben der Garngeschwindigkeit und dem Luftdruck zu den wichtigsten Prozessparametem.The individual components of the entire device act in this on-line control of Thread tension or the tension of the thread mixture in the process (air turbulence, texturing or stretching the yarn) together to guarantee perfect yarn quality. It is important that the signal chain (Fig. 2) is completely monitored and that every meter Yarn is processed under monitored tension. Because the game tension is one of the most important in these processes, along with yarn speed and air pressure Process parameters.

    Die Signalkette besteht aus Sensoren, elektrischen Verbindungen (Kabel mit Kontakten), Rechnem und Motoren. Wenn an irgendeiner Stelle in der Signalkette ein Fehler auftritt, so äussert sich dieser als Systemfehler, welcher eine Schwankung in der Drehzahl des betreffenden Lieferwerks bewirkt, die im zugehörigen Steuerrechner erfasst wird. Ein solcher Systemfehler wäre beispielsweise ein bleibende, nicht ausregelbare Regelabweichung aufgrund von Kontaktproblemen (Leckströmen) oder eine Sensorfehlfunktion. Auf diese Weise wird die gesamte Kette der Signalerfassung und -übermittlung vom einzelnen Sensor bis zum Spindelrechner überwacht. Die Haupteigenschaft der beschriebenen Vorrichtung zur Qualitätsüberwachung besteht darin, dass die Lieferwerksteuerungen zusätzlich zur Funktion der eigentlichen Motorregelung die Funktion der Überwachung des Laufverhaltens der Lieferwerke L1 bis L4 übernehmen, und dass von diesem Laufverhalten eindeutige Rückschlüsse auf eine ganze Anzahl von potentiellen Fehlerquellen möglich sind. Die Überwachung des Laufverhaltens der Lieferwerke wird durch die Sensoren und die dezentral vorgesehenen Rechner ermöglicht. Bei Fehlfunktionen oder Überlast aufgrund von Falscheinstellungen wird sofort in den Prozess eingegriffen und die betreffende Arbeitsstation wird abgestellt.The signal chain consists of sensors, electrical connections (cables with contacts), computers and motors. If an error occurs at any point in the signal chain, this is expressed as a system error which causes a fluctuation in the speed of the supplying plant in question, which is recorded in the associated control computer. Such a system error would be, for example, a permanent, non-controllable control deviation due to contact problems (leakage currents) or a sensor malfunction. In this way, the entire chain of signal acquisition and transmission from the individual sensor to the spindle computer is monitored. The main property of the described device for quality monitoring is that the delivery control systems take on the function of monitoring the running behavior of the delivery plants L 1 to L 4 in addition to the function of the actual engine control, and that this running behavior enables clear conclusions to be drawn about a whole number of potential sources of error , Monitoring of the running behavior of the supplying plants is made possible by the sensors and the decentralized computers. In the event of a malfunction or overload due to incorrect settings, the process is immediately intervened and the workstation in question is shut down.

    Da jedes Lieferwerk eine bestimmte Drehzahl einzuhalten hat, und zwar nahezu 100% synchron mit der Drehzahl des Aufwickelaggregats 3 (Fig. 1) bestimmt das Laufverhalten der Lieferwerke ganz wesentlich die Garnqualität. Oder mit anderen Worten, ein einwandfreies Laufverhalten der Lieferwerke garantiert eine hohe Gamqualität. Jede vom Synchronismus abweichende Drehzahlschwankung führt unmittelbar zu einer Qualitätsminderung im Garn bis hin zu Fadenbrüchen mit dem damit verbundenen Anhalten des Prozesses.Because each supplier has to maintain a certain speed, almost 100% synchronously with the speed of the take-up unit 3 (Fig. 1) determines the running behavior of the delivery plants the yarn quality is very important. Or in other words, perfect running behavior of the supplying plants guarantees high game quality. Any that deviate from synchronism Fluctuations in speed immediately lead to a reduction in the quality of the yarn Thread breaks with the associated stopping of the process.

    Mit der beschriebenen Vorrichtung können zusätzlich zur Regelung und Überwachung der Lieferwerke auch statistische Auswertungen zur Ermittlung der Ausfallhäufigkeit und zur Standzeitüberwachung vorgenommen werden. Die digitale und dezentrale Regelung und Überwachung ermöglicht die Parametrierung der einzelnen Lieferwerke mit einem zentralen Bediencomputer. Die Anwendung der Vorrichtung bei Luftverwirbelungsprozessen führt zu einer hohen Qualität und Reproduzierbarkeit, die Anwendung bei Streckprozessen führt zu einem sehr gleichmässigen Garn mit garantierter Qualität. Ausserdem können mit der Vorrichtung durch gezielte Drehzahlvariationen Effektgame produziert werden,With the device described, in addition to the regulation and monitoring of the supplying plants also statistical evaluations to determine the frequency of failure and to monitor service life be made. The digital and decentralized control and monitoring enables the parameterization of the individual delivery plants with a central operating computer. The use of the device in air swirling processes leads to high quality and reproducibility, the application in stretching processes leads to a very uniform Guaranteed quality yarn. In addition, with the device through targeted speed variations Effect games are produced,

    Claims (13)

    1. Device for monitoring the quality of yarns (A, B) on textile machines that have several motor-driven single shafts (L1 - L4) , a central spindle computer (8) , a winding unit (3) and a drive motor (M1 - M4) controlled by the central spindle computer (8) for each of the single shafts (L1 - L4), characterized in that assigned to each single shaft (L1 - L4) is at least one sensor for the speed of the drive motor (M1 - M4) as well as a local computer (P1 - P4), to which the signals of the at least one sensor are supplied for processing, that a motor-internal sensor is provided for monitoring the current consumed, and that the signals of the two sensors are compared in the local computers (P1 - P4).
    2. Device according to claim 1, characterized in that continuous online control of the yarn tension ratios determined by the draft and the delivery between the individual single shafts (L1 - L4) takes place.
    3. Device according to claim 2, characterized in that the speed and the momentary loading of each single shaft (L1 - L4) are detected separately.
    4. Device according to claim 3, characterized in that the detection is executed redundantly and carried out by two mutually controlling sensors.
    5. Device according to one of claims 1 to 4, characterized in that the local computers (P1 - P4) are connected to the central spindle computer (8) and that with reference to monitoring of the speeds and of the current consumed by the drive motors (M1 - M4), monitoring is effected of the signal chain consisting of sensors, electrical connections, computers (P1 - P4; 8) and drive motors (M1 - M4), any fault at any point in the system causing a detectable running variation in a speed and/or a variation in the current consumed by a drive motor (M1 - M4).
    6. Device according to claim 5, characterized in that the connection between the local computers (P1 - P4) and the central spindle computer (8) is produced via a bus system (7), and that the local computers (P1 - P4) are monitored by the spindle computer (8).
    7. Device according to claim 6, characterized in that the single shafts (L1 - L4) are controlled synchronously with the speed of the winding unit (3).
    8. Device according to one of claims 1 to 7, characterized in that, in the event of a fault being detected, in the event of overload or if representative limit values for the permitted yarn quality are exceeded, the working station concerned is stopped and a fault message is sent.
    9. Use of the device according to claim 1 on air intermingling and/or texturing machines, characterized in that the single shafts (L1 - L4) form feeder rolls of said machines, which are controlled by said sensors with reference to the local monitoring.
    10. Use according to claim 9, characterized in that in the local monitoring the yarn tension is checked.
    11. Use according to claim 10, characterized in that to monitor the yarn tension the speed of each single shaft (L1 - L4) is measured and compared with a specified value, and that the current supplied to each drive motor (M1 - M4) of the single shafts (L1 - L4) is monitored.
    12. Use according to claim 11, characterized in that the momentary loading of each single shaft (L1 - L4) is detected separately, a back calculation being made to the current load torque via the current presently flowing to correct a control fault.
    13. Use according to one of claims 9 to 12, characterized in that the entire chain of signal acquisition and signal communication is monitored from the sensors detecting the signals as far as the spindle computer.
    EP99113196A 1999-07-08 1999-07-08 Method and device for monitoring the quality of yarns Expired - Lifetime EP1067224B1 (en)

    Priority Applications (3)

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    EP99113196A EP1067224B1 (en) 1999-07-08 1999-07-08 Method and device for monitoring the quality of yarns
    AT99113196T ATE258241T1 (en) 1999-07-08 1999-07-08 METHOD AND DEVICE FOR QUALITY MONITORING OF YARN
    DE59908371T DE59908371D1 (en) 1999-07-08 1999-07-08 Method and device for quality monitoring of yarns

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    Application Number Priority Date Filing Date Title
    EP99113196A EP1067224B1 (en) 1999-07-08 1999-07-08 Method and device for monitoring the quality of yarns

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    EP1067224B1 true EP1067224B1 (en) 2004-01-21

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    ITMI20050335A1 (en) * 2005-03-03 2006-09-04 Angeloni Germano CONTROL DEVICE FOR THE COUPLING OF TWO OR MORE WIRES ON TEXTILE MACHINES
    CN108350616B (en) * 2015-11-11 2021-08-06 欧瑞康纺织有限及两合公司 Method for monitoring mass during deformation and deformation device
    ES2784920B2 (en) * 2020-02-10 2021-05-11 Twistperfect S L MACHINE AND PROCESS OF UNWINDING AND WINDING THREAD AT A SPEED GREATER THAN 1M / S
    DE102020006542A1 (en) * 2020-10-24 2022-04-28 Oerlikon Textile Gmbh & Co. Kg Method for controlling the speed of godets and device for guiding, stretching and/or relaxing threads

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    DE3300703A1 (en) * 1983-01-11 1984-07-12 Siemens AG, 1000 Berlin und 8000 München Method for controlling the tensile force in elongated material
    CH683535A5 (en) * 1990-07-13 1994-03-31 Rieter Ag Maschf Drafting system drive.
    DE4119404A1 (en) * 1991-06-10 1992-12-17 Grossenhainer Textilmaschinen ROUTE OR THE LIKE
    DE4424619A1 (en) * 1993-07-28 1995-02-02 Barmag Spinnzwirn Gmbh Method for regulating a winding speed of thread-like material

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