EP0463529B1 - Process and device for operating a ring spinning or twisting machine with the maximum possible spindle speed - Google Patents

Process and device for operating a ring spinning or twisting machine with the maximum possible spindle speed Download PDF

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Publication number
EP0463529B1
EP0463529B1 EP91109881A EP91109881A EP0463529B1 EP 0463529 B1 EP0463529 B1 EP 0463529B1 EP 91109881 A EP91109881 A EP 91109881A EP 91109881 A EP91109881 A EP 91109881A EP 0463529 B1 EP0463529 B1 EP 0463529B1
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EP
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Prior art keywords
temperature
spinning
speed
ring
operating
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EP91109881A
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German (de)
French (fr)
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EP0463529A1 (en
Inventor
Herbert Dr. Stalder
Wilhelm Dr. Funk
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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    • 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
    • D01H1/32—Driving or stopping arrangements for complete machines
    • D01H1/34—Driving or stopping arrangements for complete machines with two or more speeds; with variable-speed arrangements, e.g. variation of machine speed according to growing bobbin diameter

Definitions

  • the invention relates to a method and a device for operating a ring spinning or twisting machine according to the preamble of claim 1.
  • a method and a device of the type mentioned serve for the production of yarn, wherein an optimized running-in of spinning rings and runners is also possible at the same time.
  • the running-in process of the spinning rings usually takes a month; with a carefully run-in process, a lifespan of several years can be expected.
  • the run-in process of the runners is shorter, as is the service life of approx. 2 to 3 weeks, which means that the runners are changed frequently.
  • the document DE-A1-34 02 225 relates to a spinning machine with a speed-increasing device and a speed-reducing device, which interact with a driving program for determine the critical phase of break-in.
  • this program is fixed.
  • the devices do not enable the running-in process to be optimized.
  • the operating state of the spinning rings / rotor pairs is recorded via the operating temperature: if the running-in process is unfavorable, the wear mechanism changes such that damage occurs in a short time. This change in the wear mechanism is now manifested in an increased operating temperature. An increased operating temperature therefore means that the maximum possible inlet speed has been exceeded. If the speed is then reduced in time, irreversible damage can be avoided.
  • the maximum possible spindle speed is now found by successively increasing the speed to the limit of the permissible material load and, once the limit is recognized, immediately reducing it again.
  • the method according to the invention further allows the speeds to be optimized for retracted spinning ring / rotor pairs.
  • the possible load capacity of the runner represents a limit for the spindle speeds generally to be driven; where this limit is exceeded, this in turn manifests itself in an excessive operating temperature.
  • the method according to the invention thus further allows the maximum permissible spindle speeds to be found with regard to the thread tension during the operation of the spinning machine.
  • the present invention therefore additionally solves the task of recognizing the maximum permissible thread tension during operation of the spinning machine and thus not exceeding it.
  • the device according to claim 7 allows operating temperatures to be detected and processed in such a way that a control signal for the rotational speed of the spindle shaft drive can be generated.
  • the method can also be used to determine individual damaged rings or runners.
  • the spinning positions with an increased temperature can be displayed and processed statistically, whereby there is an indication of serious damage to the corresponding ring at an increasing temperature at a spinning position.
  • Figure 1 shows schematically a spinning unit 1 of a ring spinning or twisting machine in section. Shown are a ring bench 2 with a thread guiding device 3, consisting of a spinning ring 4 and a rotor 5 running thereon, which carries a thread 6 to be spun or twisted. Also shown is a cop 7, placed on a spindle shaft 8. To relieve the figure, an area 9 with the mounting and the connection to the drive of the spindle shaft 8 is only indicated by dashed lines.
  • the figure further shows a measuring device 11 arranged on a transport platform 10 in measuring position M in front of the runner track.
  • the measuring device 11 has an IR lens 12, an IR semiconductor sensor 13 and a preamplifier 14 and is connected to a signal line 15 for transmitting the measurement signals continuously generated by the sensor 13.
  • a position sensor 16 for detecting the measuring position of the measuring device 11 is connected to a signal line 17 for the transmission of position signals.
  • FIG. 2 schematically shows a graph of a course of the signal values transmitted via the signal lines 15 and 17.
  • the temperatures detected by the IR sensor 13 and the pulses emitted by the position sensor 16 as they pass the measuring device 11 are plotted vertically.
  • the decisive factor is the temperature signal at the moment of the pulse.
  • the curve 18 thus shows the temperature profile registered by the measuring device 11, while the pulses 19, 19 ', 19' '.. mark the measuring positions in front of the corresponding spinning position 1, 1', 1 '' ..
  • FIG. 3 schematically shows a temperature curve 20 of a runner 5 due to an accidental disturbance of the running behavior, as it e.g. then occurs when the lubrication between the flange ring 4 and the runner 5 caused by fibers of the thread to be processed is disturbed, but builds up again on its own.
  • the time is plotted on the horizontal and the operating temperature is plotted on the vertical.
  • FIG. 4 schematically shows a view of the ring bench 2 with the spinning stations 1, 1 ', 1'', etc.
  • the measuring device 11 is located in front of the spinning station 1 in measuring position M1 for measuring the temperature of the rotor 5. Further shown is in the form of a block diagram a device 21 which is used to process the temperature and position signals supplied via the signal lines 15 and 17 into a control signal for the spindle shaft drive 22.
  • the device 21 has a measuring and holding circuit 23, an analog-digital converter 24 and measured value memories 25, 25 ', each operatively connected to one another via the data lines 26, 27 and 28. Furthermore, for signal processing there is a memory 29, 29' and 29 Provided setpoint computer 30, which is operatively connected to the measured value memory 25 via a data line 31 and to the spindle drive 22 via a control line 32.
  • Figure 5 shows a graphical representation of a temperature sequence of the detected operating temperatures.
  • the measurement positions M1, M1 ', M1' ', etc. are plotted on the horizontal and the associated measurement values are plotted on the vertical.
  • a temperature interval (I) for evaluating the individual measured values is indicated by dashed lines.
  • the setpoint computer 30 retrieves the spindle speed program to be driven from the memory 29, 29 'or 29' 'and controls the spindle drive 22 according to the program.
  • the measuring unit 11 tracks the individual measuring positions M via its platform 10 (FIG. 4), continuously generating temperature signals corresponding to the measured temperature and transmitting them via the signal line 15 (FIG. 2 ).
  • the platform 10 runs along the ring bench 2, whereby it also carries out its lifting movements.
  • An operating robot for moving the platform 10 in the manner mentioned is known, for example, under the name ROBOFIL.
  • the position sensor 15 transmits a position signal via the signal line 17 as soon as the measuring device 11 is in the measuring position M, which allows the measuring and holding circuit 23 to recognize the supplied measuring signal as an operating temperature signal of a specific spinning position and via the analog-digital converter 24 in the measured value memory 25 to form a temperature sequence S from the measured values of all operating temperatures to be measured.
  • the average temperature TD is now determined from a temperature sequence S, to which a temperature interval I of predetermined width is assigned.
  • the interval I can also be determined by a statistical evaluation of the measured temperature values.
  • the interval I is used to classify measurement values with measurement inaccuracies or other insignificant deviations as the same, while measurement values lying outside the interval I are recognized as deviations.
  • the interval I can be, for example, 3 to 5 ° and is symmetrical to the ordinate value of the average temperature TD, as shown in FIG. 5.
  • Temperature values lying above the interval I are either temporary in nature (FIG. 3) or signal operating states which lead to rotor failure. It has now been shown that, depending on the type of machine, for example 5% of the malfunctions in spinning positions are temporary. In other machines, in turn, malfunctions exist in half a percent of the measured spinning positions, which disappear automatically without external intervention. So as long as less than 1% of the measured temperatures do not exceed interval I, the underlying one will be Spindle speed classified as harmless, whereupon the setpoint computer increases the setpoint speed to be driven according to the program by a predetermined value and emits a corresponding signal to the spindle drive 22 via the data line 30.
  • the setpoint computer reduces the setpoint speed of the spindles by a predetermined amount in order to return to a safe speed range.
  • the percentage at which a speed increase is allowed is designated P1. For example, it can have a value of max. Reach 1%.
  • the percentage that makes a speed reduction necessary is denoted by P.
  • the minimum value of P can be assumed to be 1.2%.
  • a renewed increase in the spindle speed results either from the speed program or from the timing.
  • the program itself provides a higher speed level; in the second case, the setpoint computer 28 automatically triggers a renewed detection of the current spinning ring / rotor state with subsequent speed correction.
  • the temperature of the spinning rings 4 can also be measured with the measuring device described. It is to be represented as a temperature difference between ring 4 and ring bench 2, for example.
  • the operating temperature is not determined via an infrared measurement, but via a contact measurement on the ring.
  • the temperature can be measured, for example, by contact thermocouples.
  • a spinning ring changes its temperature in proportion to the operating temperature.
  • a change in the flange temperature thus signals a change in the operating temperature.
  • detection units designed as thermocouples are arranged on spinning rings and operatively connected via signal lines to the measured value memory 25 of the device 21 for processing the temperature signals. This eliminates the measuring device 11 for infrared radiation and its transport device. It is also advantageous that the temperature sequences S can be called up as a whole at any time without a time delay, since each spinning ring to be measured is provided with a thermocouple.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Betrieb einer Ringspinn- oder Zwirnmaschine gemäss Oberbegriff des 1. Anspruches.The invention relates to a method and a device for operating a ring spinning or twisting machine according to the preamble of claim 1.

Ein Verfahren und eine Vorrichtung der genannten Art dienen zur Herstellung von Garn, wobei auch gleichzeitig ein optimiertes Einlaufen von Spinnringen und Läufern möglich ist.A method and a device of the type mentioned serve for the production of yarn, wherein an optimized running-in of spinning rings and runners is also possible at the same time.

Der Einlaufvorgang der Spinnringe dauert in der Regel einen Monat; bei sorgfältig vorgenommenem Einlaufvorgang kann mit einer Lebensdauer von mehreren Jahren gerechnet werden. Der Einlaufvorgang der Läufer ist kürzer, ebenso die Lebensdauer von ca. 2 bis 3 Wochen, was einen entsprechend häufigen Wechsel der Läufer zur Folge hat.The running-in process of the spinning rings usually takes a month; with a carefully run-in process, a lifespan of several years can be expected. The run-in process of the runners is shorter, as is the service life of approx. 2 to 3 weeks, which means that the runners are changed frequently.

Naturgemäss muss das Einlaufen bei vergleichsweise tiefen Drehzahlen erfolgen, was eine verminderte Produktivität der Maschine zur Folge hat und somit unerwünscht ist.Naturally, running in must take place at comparatively low speeds, which results in reduced productivity of the machine and is therefore undesirable.

Der Einlaufvorgang selbst muss sorgfältig ausgeführt werden, sonst droht durch verkürzte Lebensdauer z.B. der Läufer ein an sich vermeidbarer Stillstand der Maschine.The running-in process itself must be carried out carefully, otherwise there is a the runner is a preventable standstill of the machine.

Entsprechend bestehen Einlaufvorschriften in Form von Programmen für die während des Einlaufvorgangs zu fahrenden Spindeldrehzahlen.Correspondingly, there are run-in regulations in the form of programs for the spindle speeds to be driven during the run-in process.

Die Schrift DE-A1-34 02 225 betrifft eine Spinnmaschine mit einer Drehzahlerhöhungsvorrichtung und einer Drehzahlreduktionsvorrichtung, die im Zusammenwirken ein Fahrprogramm für die kritische Phase des Einlaufens bestimmen. Dieses Programm ist aber fest vorgegeben. Die Vorrichtungen ermöglichen keine Optimierung des Einlaufvorgangs.The document DE-A1-34 02 225 relates to a spinning machine with a speed-increasing device and a speed-reducing device, which interact with a driving program for determine the critical phase of break-in. However, this program is fixed. The devices do not enable the running-in process to be optimized.

Solche Programme für die Spindeldrehzahlen besitzen den Nachteil, dass sie auf ungenauen Erfahrungswerten aufbauen, welche auf die Beobachtung von Läuferausfällen abgestützt sind. Dabei müssen die Spindeldrehzahlen an der unteren Grenze des Erfahrungsspektrums gehalten werden, um das Risiko vorzeitiger Zerstörung von Spinnringen oder Läufern minimal zu halten. Nun kann der Einlaufvorgang auch bei günstigem Verlauf nicht abgekürzt werden, da der Zustand der Metalloberfläche von Spinnringen und Läufern nur durch metallurgische Untersuchung, also nicht im Betrieb der Ringspinnmaschine, festgestellt werden kann.Such programs for the spindle speeds have the disadvantage that they are based on imprecise empirical values which are based on the observation of rotor failures. The spindle speeds must be kept at the lower limit of the range of experience in order to avoid the risk of premature destruction of spinning rings or runners to keep to a minimum. Now the running-in process cannot be shortened even if the course is favorable, since the condition of the metal surface of spinning rings and runners can only be determined by metallurgical examination, that is to say not during operation of the ring spinning machine.

Im ganzen ergibt sich, dass durch Einlaufprogramme zwar ein befriedigender Einlaufvorgang erreicht werden kann, aber die beim Einlaufen an sich mögliche Produktivität nicht erreichbar ist.The overall result is that a satisfactory running-in process can be achieved by running-in programs, but the productivity which is inherently possible when running in is not achievable.

Entsprechend ist es Aufgabe der vorliegenden Erfindung, diese Nachteile zu überwinden und einen Einlaufvorgang sowie eine Betriebsweise nach dem Einlaufen zu schaffen, wobei die nach dem momentanen Betriebszustand von Spinnringen und/oder Läufern möglichen, maximalen Spindeldrehzahlen gefahren werden können.Accordingly, it is an object of the present invention to overcome these disadvantages and to create a running-in process and an operating mode after running-in, wherein the maximum spindle speeds that are possible according to the current operating state of spinning rings and / or rotors can be driven.

Diese Aufgabe wird durch die kennzeichnenden Merkmale der Ansprüche 1 bzw. 6 gelöst.This object is solved by the characterizing features of claims 1 and 6, respectively.

Durch das Verfahren nach Anspruch 1 wird über die Betriebstemperatur der Betriebszustand der Spinnringe/Läuferpaare erfasst: bei ungünstig verlaufendem Einlaufvorgang ändert sich der Verschleissmechanismus derart, dass in kurzer Zeit Schäden auftreten. Diese Aenderung des Verschleissmechanismus äussert sich nun in einer erhöhten Betriebstemperatur. Somit bedeutet eine erhöhte Betriebstemperatur, dass die maximal mögliche Einlaufdrehzahl überschritten worden ist. Wird darauf die Drehzahl rechtzeitig zurückgenommen, können irreversible Schäden vermieden werden.With the method according to claim 1, the operating state of the spinning rings / rotor pairs is recorded via the operating temperature: if the running-in process is unfavorable, the wear mechanism changes such that damage occurs in a short time. This change in the wear mechanism is now manifested in an increased operating temperature. An increased operating temperature therefore means that the maximum possible inlet speed has been exceeded. If the speed is then reduced in time, irreversible damage can be avoided.

Ausgehend von einem Drehzahlprogramm wird nun die maximal mögliche Spindeldrehzahl gefunden, indem die Drehzahl sukzessive bis an die Grenze der zulässigen Materialbelastung erhöht und, nach dem Erkennen der Grenze, sofort wieder etwas zurückgenommen wird.Starting from a speed program, the maximum possible spindle speed is now found by successively increasing the speed to the limit of the permissible material load and, once the limit is recognized, immediately reducing it again.

Durch fortlaufende Wiederholung während der verschiedenen Stadien eines Einlaufprogramms ergibt sich somit eine Adaption des Programms im Sinn maximaler Spindeldrehzahlen aufgrund des aktuellen Zustandes der Spinnringe/Läufer.Continuous repetition during the various stages of a running-in program results in an adaptation of the program in terms of maximum spindle speeds based on the current state of the spinning rings / rotors.

Das erfindungsgemässe Verfahren erlaubt weiter eine Optimierung der Drehzahlen für eingefahrene Spinnring/Läuferpaare. Wie beim Einlaufen stellt die mögliche Belastungsfähigkeit des Läufers eine Grenze für die generell zu fahrenden Spindeldrehzahlen dar; wo diese Grenze überschritten wird, äussert sich dies wiederum in einer überhöhten Betriebstemperatur.The method according to the invention further allows the speeds to be optimized for retracted spinning ring / rotor pairs. As with running in, the possible load capacity of the runner represents a limit for the spindle speeds generally to be driven; where this limit is exceeded, this in turn manifests itself in an excessive operating temperature.

Wo die Fadenspannung zwischen Streckwerk und Kops einen überhöhten Wert annimmt, ist eine vermehrte Reibleistung zwischen Spinnring und Läufer die Folge, was sich wiederum in einer erhöhten Betriebstemperatur äussert. Damit erlaubt das erfindungsgemässe Verfahren weiter, während des Betriebs der Spinnmaschine die real höchstzulässigen Spindeldrehzahlen im Hinblick auf die Fadenspannung zu finden. Mithin löst die vorliegende Erfindung zusätzlich die Aufgabe, die maximal zulässige Fadenspannung im Betrieb der Spinnmaschine zu erkennen und somit nicht zu überschreiten.Where the thread tension between the drafting system and the cop takes on an excessive value, the result is increased friction between the spinning ring and the rotor, which in turn manifests itself in an increased operating temperature. The method according to the invention thus further allows the maximum permissible spindle speeds to be found with regard to the thread tension during the operation of the spinning machine. The present invention therefore additionally solves the task of recognizing the maximum permissible thread tension during operation of the spinning machine and thus not exceeding it.

Die Vorrichtung nach Anspruch 7 erlaubt, Betriebstemperaturen zu detektieren und derart zu verarbeiten, dass ein Steuersignal für die Drehzahl des Spindelwellenantriebs generierbar ist.The device according to claim 7 allows operating temperatures to be detected and processed in such a way that a control signal for the rotational speed of the spindle shaft drive can be generated.

Das Verfahren kann auch verwendet werden, um einzelne geschädigte Ringe bzw. Läufer zu ermitteln. Die Spinnstellen mit erhöhter Temperatur können angezeigt werden und statistisch verarbeitet werden, wobei bei immer erhöhter Temperatur bei einer Spinnstelle ein Hinweis auf eine gravierende Schädigung des entsprechenden Ringes vorliegt.The method can also be used to determine individual damaged rings or runners. The spinning positions with an increased temperature can be displayed and processed statistically, whereby there is an indication of serious damage to the corresponding ring at an increasing temperature at a spinning position.

Bevorzugte Ausführungsformen weisen Merkmale der weiteren Ansprüche auf.Preferred embodiments have features of the further claims.

Ein Ausführungsbeispiel der Erfindung wird anhand der Figuren näher erläutert.An embodiment of the invention is explained in more detail with reference to the figures.

Es zeigt:

Fig. 1
schematisch einen Schnitt durch eine Spinneinheit mit einer Fadenführungseinrichtung, einem Kops und einer Messeinrichtung für die Temperatur des Läufers;
Fig. 2
schematisch eine Darstellung der Signalwerte der Messeinrichtung von Figur 1 beim Passieren von in Betrieb stehenden Spinnstellen;
Fig. 3
schematisch eine Darstellung des Temperaturverlaufs eines Läufers aufgrund einer zufälligen Störung des Laufverhaltens;
Fig. 4
schematisch eine Ringbank mit der Messeinrichtung gemäss Figur 1 sowie eine Blockschaltbild einer Einrichtung zur Verarbeitung des Messignale zu einem Steuersignal für den ebenfalls dargestellten Spindelantrieb;
Fig. 5
schematisch eine Temperatursequenz der Fadenführungseinrichtungen einer Ringbank in grafischer Darstellung.
It shows:
Fig. 1
schematically shows a section through a spinning unit with a thread guide device, a cop and a measuring device for the temperature of the rotor;
Fig. 2
schematically a representation of the signal values of the measuring device of Figure 1 when passing operating spinning stations;
Fig. 3
schematically a representation of the temperature profile of a runner due to a random disturbance in the running behavior;
Fig. 4
schematically a ring bench with the measuring device according to Figure 1 and a block diagram of a device for processing the measurement signals into a control signal for the spindle drive also shown;
Fig. 5
schematically shows a temperature sequence of the thread guide devices of a ring bench in a graphic representation.

Figur 1 zeigt schematisch eine Spinneinheit 1 einer Ringspinn- oder Zwirnmaschine im Schnitt. Dargestellt sind eine Ringbank 2 mit einer Fadenführungsvorrichtung 3, bestehend aus einem Spinnring 4 und einem daran laufenden Läufer 5, welcher einen zu verspinnenden oder zu zwirnenden Faden 6 führt. Weiter dargestellt ist ein Kops 7, aufgesteckt auf einer Spindelwelle 8. Zur Entlastung der Figur ist ein Bereich 9 mit der Lagerung und der Verbindung mit dem Antrieb der Spindelwelle 8 nur gestrichelt angedeutet.Figure 1 shows schematically a spinning unit 1 of a ring spinning or twisting machine in section. Shown are a ring bench 2 with a thread guiding device 3, consisting of a spinning ring 4 and a rotor 5 running thereon, which carries a thread 6 to be spun or twisted. Also shown is a cop 7, placed on a spindle shaft 8. To relieve the figure, an area 9 with the mounting and the connection to the drive of the spindle shaft 8 is only indicated by dashed lines.

Die Figur zeigt weiter eine auf einer Transportplattform 10 angeordnete Messeinrichtung 11 in Messposition M vor der Läuferbahn. Die Messeinrichtung 11 besitzt eine IR-Linse 12, einen IR-Halbleitersensor 13 und einen Vorverstärker 14 und ist mit einer Signalleitung 15 zur Uebertragung der vom Sensor 13 laufend erzeugten Messignale verbunden.The figure further shows a measuring device 11 arranged on a transport platform 10 in measuring position M in front of the runner track. The measuring device 11 has an IR lens 12, an IR semiconductor sensor 13 and a preamplifier 14 and is connected to a signal line 15 for transmitting the measurement signals continuously generated by the sensor 13.

Ein Positionssensor 16 zum Detektieren der Messposition der Messeinrichtung 11 ist mit einer Signalleitung 17 zur Uebertragung von Positionssignalen verbunden.A position sensor 16 for detecting the measuring position of the measuring device 11 is connected to a signal line 17 for the transmission of position signals.

Figur 2 zeigt schematisch in grafischer Darstellung einen Verlauf der über die Signalleitungen 15 und 17 übertragenen Signalwerte. In der horizontalen Achse als Positionsachse liegen die Messpositionen M1, M1', M1'' etc., welche die Messeinrichtung 11 passiert, wenn sie der Ringbank 2 entlang geführt wird (Fig. 4). Vertikal sind die vom IR-Sensor 13 detektierten Temperaturen bzw. die vom Positionssensor 16 beim Passieren der Messeinrichtung 11 abgegebenen Impulse aufgetragen. Massgebend ist das Temperatursignal im Moment des Impulses. Mithin zeigt die Kurve 18 den von der Messeinrichtung 11 registrierten Temperaturverlauf, während die Impulse 19, 19', 19'' .. die Messpositionen vor der entsprechenden Spinnstelle 1, 1', 1'' .. markieren.FIG. 2 schematically shows a graph of a course of the signal values transmitted via the signal lines 15 and 17. The measuring positions M1, M1 ', M1' 'etc., which the measuring device 11 passes when it is guided along the ring bank 2 (FIG. 4), lie in the horizontal axis as the position axis. The temperatures detected by the IR sensor 13 and the pulses emitted by the position sensor 16 as they pass the measuring device 11 are plotted vertically. The decisive factor is the temperature signal at the moment of the pulse. The curve 18 thus shows the temperature profile registered by the measuring device 11, while the pulses 19, 19 ', 19' '.. mark the measuring positions in front of the corresponding spinning position 1, 1', 1 '' ..

Figur 3 zeigt schematisch in grafischer Darstellung eine Temperaturkurve 20 eines Läufers 5 aufgrund einer zufälligen Störung des Laufverhaltens, wie sie z.B. dann auftritt, wenn die durch Fasern des zu verarbeitenden Fadens erfolgende Schmierung zwischen Einflanschring 4 und Läufer 5 gestört wird, sich aber wieder von selbst aufbaut. In der Horizontalen ist die Zeit, in der Vertikalen die Betriebstemperatur aufgetragen.FIG. 3 schematically shows a temperature curve 20 of a runner 5 due to an accidental disturbance of the running behavior, as it e.g. then occurs when the lubrication between the flange ring 4 and the runner 5 caused by fibers of the thread to be processed is disturbed, but builds up again on its own. The time is plotted on the horizontal and the operating temperature is plotted on the vertical.

Figur 4 zeigt schematisch eine Ansicht der Ringbank 2 mit den Spinnstellen 1, 1', 1'', etc. Die Messeinrichtung 11 befindet sich vor der Spinnstelle 1 in Messposition M1 zur Messung der Temperatur des Läufers 5. Weiter dargestellt ist in Form eines Blockschemas eine Einrichtung 21, welche der Verarbeitung der über die Signalleitungen 15 und 17 gelieferten Temperatur- und Positionssignale zu einem Steuersignal für den Spindelwellenantrieb 22 dient.FIG. 4 schematically shows a view of the ring bench 2 with the spinning stations 1, 1 ', 1'', etc. The measuring device 11 is located in front of the spinning station 1 in measuring position M1 for measuring the temperature of the rotor 5. Further shown is in the form of a block diagram a device 21 which is used to process the temperature and position signals supplied via the signal lines 15 and 17 into a control signal for the spindle shaft drive 22.

Dazu besitzt die Einrichtung 21 eine Mess- und Halteschaltung 23, einen Analog-Digitalwandler 24 und Messwertspeicher 25, 25', jeweils betriebsfähig miteinander verbunden über die Datenleitungen 26, 27 und 28. Weiter ist zur Signalverarbeitung ein mit Speichern 29, 29' und 29'' versehener Sollwertrechner 30 vorgesehen, welcher mit dem Messwertspeicher 25 über eine Datenleitung 31 und mit dem Spindelantrieb 22 über eine Steuerleitung 32 betriebsfähig verbunden ist.For this purpose, the device 21 has a measuring and holding circuit 23, an analog-digital converter 24 and measured value memories 25, 25 ', each operatively connected to one another via the data lines 26, 27 and 28. Furthermore, for signal processing there is a memory 29, 29' and 29 Provided setpoint computer 30, which is operatively connected to the measured value memory 25 via a data line 31 and to the spindle drive 22 via a control line 32.

Figur 5 zeigt in grafischer Darstellung eine Temperatursequenz der detektierten Betriebstemperaturen. In der Horizontalen sind die Messpositionen M1, M1', M1'', etc. und in der Vertikalen die zugehörigen Messwerte aufgetragen. Gestrichelt angedeutet ist ein Temperaturintervall (I) zur Bewertung der einzelnen Messwerte.Figure 5 shows a graphical representation of a temperature sequence of the detected operating temperatures. The measurement positions M1, M1 ', M1' ', etc. are plotted on the horizontal and the associated measurement values are plotted on the vertical. A temperature interval (I) for evaluating the individual measured values is indicated by dashed lines.

Wird nun die Ringspinn- oder Zwirnmaschine in Betrieb gesetzt, ruft der Sollwertrechner 30 aus dem Speicher 29, 29' oder 29'' das zu fahrende Spindeldrehzahlprogramm ab und steuert den Spindelantrieb 22 programmgemäss an.If the ring spinning or twisting machine is now put into operation, the setpoint computer 30 retrieves the spindle speed program to be driven from the memory 29, 29 'or 29' 'and controls the spindle drive 22 according to the program.

Damit der aktuelle Zustand der Spinnringe/Läufer erfasst werden kann, wird die Messeinheit 11 über ihre Plattform 10 den einzelnen Messpositionen M nachgeführt (Fig. 4), wobei sie laufend der gemessenen Temperatur entsprechende Temperatursignale erzeugt und über die Signalleitung 15 überträgt (Fig. 2). Dazu läuft die Plattform 10 der Ringbank 2 entlang, wobei sie deren Hubbewegungen mitvollzieht. Ein Bedienungsroboter zur Bewegung der Plattform 10 in der genannten Art ist z.B. unter der Bezeichnung ROBOFIL bekannt.So that the current state of the spinning rings / runners can be detected, the measuring unit 11 tracks the individual measuring positions M via its platform 10 (FIG. 4), continuously generating temperature signals corresponding to the measured temperature and transmitting them via the signal line 15 (FIG. 2 ). For this purpose, the platform 10 runs along the ring bench 2, whereby it also carries out its lifting movements. An operating robot for moving the platform 10 in the manner mentioned is known, for example, under the name ROBOFIL.

Der Positionssensor 15 überträgt ein Positionssignal über die Signalleitung 17, sobald die Messeinrichtung 11 sich in Messposition M befindet, was der Mess- und Halteschaltung 23 erlaubt, das gelieferte Messignal als Betriebstemperatursignal einer bestimmten Spinnstelle zu erkennen und über den Analog-Digitalwandler 24 im Messwertspeicher 25 zur Bildung einer Temperatursequenz S aus den Messwerten aller zu messenden Betriebstemperaturen abzuspeichern.The position sensor 15 transmits a position signal via the signal line 17 as soon as the measuring device 11 is in the measuring position M, which allows the measuring and holding circuit 23 to recognize the supplied measuring signal as an operating temperature signal of a specific spinning position and via the analog-digital converter 24 in the measured value memory 25 to form a temperature sequence S from the measured values of all operating temperatures to be measured.

Im Sollwertrechner 30 wird nun aus einer Temperatursequenz S die Durchschnittstemperatur TD bestimmt, welcher ein Temperaturintervall I vorbestimmter Breite zugeordnet ist. Das Intervall I kann auch durch eine statistische Auswertung der gemessenen Temperaturwerte ermittelt werden. Das Intervall I dient dazu, mit Messungenauigkeiten oder anderen unbedeutenden Abweichungen behaftete Messwerte als gleich einzustufen, während ausserhalb des Intervalls I liegende Messwerte als abweichend erkannt werden. Das Intervall I kann beispielsweise 3 bis 5° betragen und liegt symmetrisch zum Ordinatenwert der Durchschnittstemperatur TD, wie in Figur 5 dargestellt ist.In the setpoint computer 30, the average temperature TD is now determined from a temperature sequence S, to which a temperature interval I of predetermined width is assigned. The interval I can also be determined by a statistical evaluation of the measured temperature values. The interval I is used to classify measurement values with measurement inaccuracies or other insignificant deviations as the same, while measurement values lying outside the interval I are recognized as deviations. The interval I can be, for example, 3 to 5 ° and is symmetrical to the ordinate value of the average temperature TD, as shown in FIG. 5.

Im folgenden wird die Adaption des Drehzahlprogramms erläutert. Als oberhalb des Intervalls liegende Betriebstemperaturen werden solche bezeichnet, die grösser als die um die halbe Intervallbreite I erhöhte Durchschnittstemperatur TD sind.The adaptation of the speed program is explained below. Operating temperatures above the interval are those which are greater than the average temperature TD increased by half the interval width I.

Oberhalb des Intervalls I liegende Temperaturwerte sind entweder vorübergehender Natur (Fig. 3), oder signalisieren Betriebszustände, welche zum Läuferausfall führen. Es hat sich nun gezeigt, dass je nach Maschinentyp z.B. 5% der Störungen in Spinnstellen vorübergehender Natur sind. Bei anderen Maschinen wiederum sind bei einem halben Prozent der gemessenen Spinnstellen Störungen vorhanden, welche ohne äusseren Eingriff von selbst wieder verschwinden. Solange also weniger als 1% der gemessenen Temperaturen das Intervall I nicht übersteigen, wird die zugrundeliegende Spindeldrehzahl als ungefährlich eingestuft, worauf der Sollwertrechner die gemäss Programm zu fahrende Sollwert-Drehzahl um einen vorbestimmten Wert erhöht und über die Datenleitung 30 ein entsprechendes Signal an den Spindelantrieb 22 abgibt. Liegen mehr als 1% der gemessenen Temperaturen über dem Intervall I, nimmt der Sollwertrechner die Sollwert-Drehzahl der Spindeln um einen vorgegebenen Betrag zurück, um wieder in einen ungefährlichen Drehzahlbereich zu gelangen. Der Prozentsatz, bei dem eine Drehzahlerhöhung erlaubt ist, wird mit P1 bezeichnet. Er kann beispielsweise einen Wert von zum Beispiel max. 1% er-reichen. Der Prozentsatz, der eine Drehzahlerniedrigung notwendig macht, wird mit P bezeichnet. Der minimale Wert von P kann zum Beispiel mit 1,2% angenommen werden.Temperature values lying above the interval I are either temporary in nature (FIG. 3) or signal operating states which lead to rotor failure. It has now been shown that, depending on the type of machine, for example 5% of the malfunctions in spinning positions are temporary. In other machines, in turn, malfunctions exist in half a percent of the measured spinning positions, which disappear automatically without external intervention. So as long as less than 1% of the measured temperatures do not exceed interval I, the underlying one will be Spindle speed classified as harmless, whereupon the setpoint computer increases the setpoint speed to be driven according to the program by a predetermined value and emits a corresponding signal to the spindle drive 22 via the data line 30. If more than 1% of the measured temperatures lie above the interval I, the setpoint computer reduces the setpoint speed of the spindles by a predetermined amount in order to return to a safe speed range. The percentage at which a speed increase is allowed is designated P1. For example, it can have a value of max. Reach 1%. The percentage that makes a speed reduction necessary is denoted by P. For example, the minimum value of P can be assumed to be 1.2%.

Eine erneute Erhöhung der Spindeldrehzahl ergibt sich entweder aufgrund des Drehzahlprogramms oder aufgrund des Zeitablaufs. Im ersten Fall sieht das Programm selbst eine höhere Drehzahlstufe vor; im zweiten Fall löst der Sollwertrechner 28 automatisch eine erneute Detektion des aktuellen Spinnringes/Läuferzustands mit anschliessender Drehzahlkorrektur aus.A renewed increase in the spindle speed results either from the speed program or from the timing. In the first case, the program itself provides a higher speed level; in the second case, the setpoint computer 28 automatically triggers a renewed detection of the current spinning ring / rotor state with subsequent speed correction.

Dadurch ergibt sich eine Adaption des Programms im Sinn maximal möglicher Spindeldrehzahlen aufgrund des aktuellen Zustands von Spinnringen/Läufern, was erlaubt, während des Einlaufvorgangs die maximal mögliche Produktivität der Spinn- oder Zwirnmaschine auszuschöpfen, und gleichzeitig das Risiko von eventuell später auftretenden Einlaufschäden mit den dazugehörigen Produktionsausfällen zu vermeiden.This results in an adaptation of the program in terms of the maximum possible spindle speeds based on the current state of spinning rings / runners, which allows the maximum possible productivity of the spinning or twisting machine to be exploited during the running-in process, and at the same time the risk of possibly occurring later running-in damage with the associated To avoid production downtimes.

Anstatt die Betriebstemperatur über die Läufertemperatur zu ermitteln, wie bisher beschrieben, kann mit der beschriebenen Messeinrichtung auch die Temperatur der Spinnringe 4 gemessen werden. Sie ist als Temperaturdifferenz beispielsweise zwischen Ring 4 und Ringbank 2 darzustellen.Instead of determining the operating temperature via the rotor temperature, as previously described, the temperature of the spinning rings 4 can also be measured with the measuring device described. It is to be represented as a temperature difference between ring 4 and ring bench 2, for example.

Bei einem in den Figuren nicht dargestellten Ausführungsbeispiel wird die Betriebstemperatur nicht über eine Infrarot-Messung ermittelt, sondern über eine Kontaktmessung am Ring. Die Temperatur kann beispielsweise durch Kontakt-Thermoelemente gemessen werden. Versuche haben ergeben, dass ein Spinnring seine Temperatur proportional zur Betriebstemperatur ändert. Eine Aenderung der Flanschtemperatur signalisiert somit eine Aenderung der Betriebstemperatur. Entsprechend werden als Thermoelement ausgebildete Detektionseinheiten an Spinnringen angeordnet und über Signalleitungen mit dem Messwertspeicher 25 der Einrichtung 21 zur Verarbeitung der Temperatursignale betriebsfähig verbunden. Damit entfällt die Messeinrichtung 11 für Infrarot-Strahlung sowie deren Transporteinrichtung. Weiter ist vorteilhaft, dass die Temperatursequenzen S ohne zeitliche Verzögerung jederzeit als Ganzes abgerufen werden können, da jeder zu messende Spinnring mit einem Thermoelement versehen ist.In an embodiment not shown in the figures, the operating temperature is not determined via an infrared measurement, but via a contact measurement on the ring. The temperature can be measured, for example, by contact thermocouples. Experiments have shown that a spinning ring changes its temperature in proportion to the operating temperature. A change in the flange temperature thus signals a change in the operating temperature. Correspondingly, detection units designed as thermocouples are arranged on spinning rings and operatively connected via signal lines to the measured value memory 25 of the device 21 for processing the temperature signals. This eliminates the measuring device 11 for infrared radiation and its transport device. It is also advantageous that the temperature sequences S can be called up as a whole at any time without a time delay, since each spinning ring to be measured is provided with a thermocouple.

Claims (12)

  1. A method for operating a ring spinning machine or a doubling frame, whose spinning or doubling units arranged in a frame and operably connected to a drive are provided with at least one yarn guiding apparatus with one spinning ring each arranged on a ring rail as well as with one traveller each running thereon and one spindle each for a spinning ring, and in which a predefined speed program is executed for the spindle speed depending on the condition of the yarn guiding apparatus, characterized in that the condition of the ring (4) or the traveller (5) during the spinning operation is obtained by means of continuous detection of their operating temperatures and that for the continuous adaptation of the speed program it is evaluated in the sense of the maximally possible spindle speeds.
  2. A method as claimed in claim 1, characterized in that the detection of the operating temperatures is carried out by contact measurement of the temperatures of the spinning rings (4).
  3. A method as claimed in claim 1, characterized in that the detection of the operating temperatures is carried out by contact-free measurement of the temperatures of travellers (5) and/or spinning rings (4).
  4. A method as claimed in one of the claims 2 or 3, characterized in that the travellers (5) or spinning rings (4) to be measured are scanned repeatedly in a successive sequence by at least one detection unit for forming a temperature sequence (S) and that the adaptation of the speed program is made on the basis of one or several temperature sequences (S).
  5. A method as claimed in one of the claims 1 to 4, characterized in that from the temperatures of a temperature sequence (S) an average temperature (TD) is formed which is allocated to a temperature interval (I) of a predefined width and that the actual set speed value of the speed program is increased by a predefined amount as long as a percentage rate (P1) of the measured temperature lies above the average temperature (TD) increased by half the interval (I), with this percentage rate (P1) being, for example ≦ 1 % and the interval being 3 to 5°.
  6. A method as claimed in claim 1 and 5, characterized in that the set speed value is reduced when as a minimum a percentage rate (P) of the measured temperatures lies over the average temperature (TD) increased by half the interval (I), with the percentage rate (P) being, for example, larger by a factor of 1.2 than the maximum percentage rate (P1).
  7. An apparatus for carrying out the method as claimed in one of the claims 1 to 6, characterized in that it comprises at least one detection unit for detecting the operating temperatures and one device (21) for processing the temperature signals generated by a detection unit into a speed control signal for the spindle drive (22).
  8. An apparatus as claimed in claim 7, characterized in that the detection unit for detecting the operating temperature is provided with a measuring device (11) for infrared radiation.
  9. An apparatus as claimed in claim 8, characterized in that the measuring device (11) for infrared radiation is arranged on a conveyor platform (10) displaceable along the ring rail (2) in such a way that it passes the measuring positions at always the same distance irrespective of the lift of the ring rail (2).
  10. An apparatus as claimed in claim 7, characterized in that position sensors (16) are provided at the spinning positions (1, 1' , 1'',....), which sensors are operably connected to the device (21) for transmitting the position of the measuring unit (11).
  11. An apparatus as claimed in claim 7, characterized in that detecting units arranged as thermocouples are arranged at the spinning rings (4) and that they are each operably connected to the device (21) for transmitting temperature signals.
  12. An apparatus as claimed in one of the claims 7 to 10, characterized in that the device (21) is provided with a circuit (24) for analog-to-digital conversion of the temperature signals, a memory (25, 25') for storing the temperature and position signals as well as a set value computer (30) for generating the speed control signal, which computer is provided with memories (29, 29', 29'') for speed programs.
EP91109881A 1990-06-28 1991-06-17 Process and device for operating a ring spinning or twisting machine with the maximum possible spindle speed Expired - Lifetime EP0463529B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2166/90 1990-06-28
CH216690 1990-06-28

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EP0463529A1 EP0463529A1 (en) 1992-01-02
EP0463529B1 true EP0463529B1 (en) 1994-10-26

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EP91109881A Expired - Lifetime EP0463529B1 (en) 1990-06-28 1991-06-17 Process and device for operating a ring spinning or twisting machine with the maximum possible spindle speed

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EP (1) EP0463529B1 (en)
JP (1) JPH05117924A (en)
CS (1) CS194391A3 (en)
DE (1) DE59103322D1 (en)

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Publication number Priority date Publication date Assignee Title
EP2107142A3 (en) * 2008-03-25 2012-04-25 Maschinenfabrik Rieter Ag Method for operating a spinning frame
CH710443B1 (en) * 2014-12-03 2018-07-31 Egolf Heinz Method and device for automatically monitoring the quality of sleeves on spinning and twisting spindles.
CH714082A1 (en) * 2017-08-25 2019-02-28 Rieter Ag Maschf Method for operating a ring spinning machine and ring spinning machine.
CN107587214A (en) * 2017-10-30 2018-01-16 经纬纺织机械股份有限公司 A kind of ring rail of spinning machine lifting speed than method of adjustment
CN113684571A (en) * 2021-08-18 2021-11-23 江苏格罗瑞节能科技有限公司 Monitor for running-in effect of ring track

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Publication number Priority date Publication date Assignee Title
CH542133A (en) * 1971-05-27 1973-09-30 Zellweger Uster Ag Electronic thread (yarn) monitor - with renning switches for individual threads
DE3402225A1 (en) * 1984-01-24 1985-07-25 Zinser Textilmaschinen Gmbh, 7333 Ebersbach RING SPIDER OR TWINING MACHINE
DD248614B1 (en) * 1986-04-24 1988-07-20 Textima Veb K DEVICE FOR CONTROLLING THE DELIVERY SPEED OF PRE-SPILL MACHINES

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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CS194391A3 (en) 1992-02-19
JPH05117924A (en) 1993-05-14
DE59103322D1 (en) 1994-12-01
EP0463529A1 (en) 1992-01-02

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