EP1975290B1 - Verfahren zum Betreiben einer Kreuzspulen herstellenden Textilmaschine - Google Patents

Verfahren zum Betreiben einer Kreuzspulen herstellenden Textilmaschine Download PDF

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Publication number
EP1975290B1
EP1975290B1 EP08003621A EP08003621A EP1975290B1 EP 1975290 B1 EP1975290 B1 EP 1975290B1 EP 08003621 A EP08003621 A EP 08003621A EP 08003621 A EP08003621 A EP 08003621A EP 1975290 B1 EP1975290 B1 EP 1975290B1
Authority
EP
European Patent Office
Prior art keywords
thread
limit value
deviation
spinning
length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP08003621A
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German (de)
English (en)
French (fr)
Other versions
EP1975290A3 (de
EP1975290A2 (de
Inventor
Manfred Lassmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Oerlikon Textile GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oerlikon Textile GmbH and Co KG filed Critical Oerlikon Textile GmbH and Co KG
Publication of EP1975290A2 publication Critical patent/EP1975290A2/de
Publication of EP1975290A3 publication Critical patent/EP1975290A3/de
Application granted granted Critical
Publication of EP1975290B1 publication Critical patent/EP1975290B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • 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
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/24—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to delivery of a measured length of material, completion of winding of a package or filling of a receptacle

Definitions

  • the present invention relates to a method for operating a cheese-producing textile machine according to the preamble of claim 1.
  • the DE 42 35 450 A1 describes a method for determining the diameter of a coil at a spinning station of a spinning machine, in which the speed of the feed roller, the rotor speed, the speed of the trigger and the winding roller are detected by means of sensors for determining the coil diameter.
  • the yarn length is determined empirically, which is based on a specific coil diameter.
  • the empirically determined yarn length serves as a reference value to which the actual measured yarn length is related.
  • the name DE 42 35 450 A1 external influences whose occurrence influence the determination of the coil diameter.
  • the use of differently hard, possibly run-in pressure rollers is mentioned as such an influencing factor. Such worn-out pressure rollers cause the occurrence of different slip on the take-off rolls.
  • the invention is based on the object to provide a method for operating a textile machine, which allows the automatic detection of the wear of pressure rollers.
  • the inventive method according to claim 1 provides that with the start of piecing the theoretical conveying length of the thread based on the surface speed of the pair of delivery rollers is determined until the beginning of the piecing has reached the sensor device, that the deviation of the theoretical conveying length of a target thread length , which corresponds to the distance between the spinning device and the sensor device, it is detected that the deviation is compared with a presettable limit value of the allowable deviation, and that the passage of the limit value is evaluated and signaled as an indicator of intolerable wear of the pressure roller.
  • the method according to the invention makes it possible for the user to permit an assessment of the quality of the piecing device, even independently of a visual inspection of the piecing device.
  • the quality reduction thus determined can be reproduced in a reproducible manner on the wear of the pressure rollers.
  • piecers which lie outside predeterminable limits are assigned to a certain error class on the assumption that defective piecing parameters are present, although the actual cause for the occurring quality deviation is not caused by the piecing parameters.
  • This uncertainty with regard to the cause of a poor quality in Anspinnern can lead to the fact that it is easy for optimization attempts to make wrong decisions regarding the parametrization of the piecing process.
  • This can be avoided by the method according to the invention by the piezos with measurable trigger slip when passing a limit eliminated and assigned to a new, own error class.
  • a statistical recording of the theoretical conveying length over a predeterminable number of piecings for forming an average value of the theoretical thread length can be carried out, the deviation of which from the nominal thread length is compared with the limit value.
  • a detection of the theoretical conveying length of only one piecing done the deviation is compared with the limit and registered when the limit is exceeded.
  • a cyclical monitoring of the wear of the pressure rollers can be set up as well as a monitoring carried out at irregular intervals by evaluating one or more piecers in accordance with the method according to the invention at certain intervals.
  • the process of cyclical monitoring can preferably be set centrally on the control device. Also via the control device unscheduled monitoring by an operator can be initialized at irregular intervals.
  • the evaluation of the deviation can be logged and stored.
  • the logging of the limit value overrun makes it possible to inform the user about the condition of the pressure rollers, so that the latter is enabled to check the current state of wear of pressure rollers relative to a single spinning station. This check allows the user to replace the pressure roller before any disadvantages in the Garnprüf gene, for example, the Garneehnnung or Anspinnmedicine be recognized at a spinning station.
  • the predefinable limit value for the deviation from the nominal yarn length or the predefinable limit value for the permissible standard deviation should be specifiable by the user in a defined range which can be set on the textile machine.
  • the limit value can be preset in a range between 5 mm and 30 mm.
  • the theoretical conveying length of the yarn is determined based on the surface speed of the pair of withdrawal rollers until the beginning of the piecing has reached the sensor device that a statistical coverage of the theoretical conveying length a predeterminable number of Anspinnern to form an average value, the standard deviation is compared with a presettable limit value, wherein the passing of the limit value is evaluated and signaled as an indicator of intolerable wear of the pressure roller.
  • This method takes into account the scattering due to the different degree of wear on the surface of the pressure roller, since the position of the yarn to be withdrawn differs between the rollers of the pair of take-off rollers in the axial direction.
  • the wear in the edge regions of the pair of delivery rollers is generally lower than in the middle, resulting in a different slip.
  • Exceeding the preset limit value by the determined value of the standard deviation is used as an indicator for the wear of the pressure roller.
  • a standard deviation resulting from the evaluation of the measurement lengths above a limit value defined by the user thus allows a conclusion to be drawn as to whether the deduction slip no longer depends randomly on the instantaneous mass of the piecer and the spinning tension, but rather largely on the current one Wear state of the pressure roller is determined.
  • the statistical evaluation allows an early detection of a wear situation, which in particular can negatively influence the quality of the piecing with regard to the strength and the appearance.
  • the theoretical conveying length can be determined by counting increments of an incremental encoder.
  • the take-off roll of the take-off device can be designed as an incremental encoder, or a motor serving as drive of the take-off device can have an incremental encoder.
  • the theoretical conveying length can be determined on the basis of the number of steps of a stepper motor driving the take-off device.
  • the inventive method can be carried out on spinning machines, such as open-end rotor spinning or air spinning machines, for performing the method according to the invention only a control device is provided, which is set up for statistical evaluation of the deviation of a measured theoretical conveying length of a desired thread length at a spinning station.
  • This task can preferably be carried out by the respective spinning station computer of a spinning station and / or a central control device of the spinning machine.
  • Fig. 1 shows a perspective view of a spinning station of an open-end rotor spinning machine.
  • Spinning station 1 of an open-end rotor spinning machine has a spinning device 2 for producing a thread 9 and a downstream in the direction of yarn winding device 3. On this winding device 3, the yarn 9 is wound into a cross-wound bobbin 8.
  • the thread 9 produced in the spinning device 2 is withdrawn from the spinning device 2 by a thread withdrawal device 27, which has a single-motor driven thread take-off roller 10 and an engagable to the thread take-off roll 10, frictionally entrained by this pressure roller 14.
  • a thread withdrawal device 27 which has a single-motor driven thread take-off roller 10 and an engagable to the thread take-off roll 10, frictionally entrained by this pressure roller 14.
  • an auxiliary thread guide 30 is also arranged in the area of the thread take-off device 27, which changes the running thread 9 during the withdrawal.
  • the thread 9 leaves the spinning device 2 by a so-called thread withdrawal tube 21, in the area also a pivotally mounted Anspinncousorgan 16 is arranged, which takes after a yarn break the retrieved by a suction nozzle 4 of the cheese 8 thread 9 and the thread end to Preparing for rebirth.
  • a thread monitor 26 In the area of the thread travel path, a thread monitor 26, a mechanical thread storage device 7, a pneumatic thread storage device 12 and a waxing device 5 are also arranged.
  • the winding device 3 consists of a coil frame 22 for rotatably supporting a cross-wound bobbin 8, a preferably driven by a reversible single drive 19 reel drive drum 23 and a Fadenchangier Nur 24, which is driven for example via a stepper motor 20.
  • a thread-centering device in the form of a pivotally mounted centering plate 17 can also be arranged, which, if necessary, can be defined by a drive 18 and folded in front of regular thread running paths.
  • such spinning stations 1 have a suction nozzle 4, which is adjustable by means of a stepping motor 6 between a thread receiving position lying in the region of the winding device 3 and a yarn transfer position lying in the region of the spinning device 2.
  • the individual stepper motors of the spinning station 1 are connected via various control lines to a spinning station computer 25.
  • the requirement for assessing whether wear has occurred and to what extent wear on the pressure roller has progressed is determined according to the invention by detecting the deviation of the theoretical conveying length from a nominal yarn length.
  • the distance between the spinning device 2 and the thread monitor 26 is constant due to the design and represented in the described embodiment, the desired thread length.
  • the theoretical conveying length which describes the theoretically peelable thread length of a thread-pulling device 27 operating without slippage, is determined on the basis of the number of steps of a stepping motor 31 serving as a single-motor drive, which is detected until the start of the piecing device is detected by the thread monitor 26.
  • a drive may be provided which has an incremental encoder or the thread withdrawal roller 10 has an incremental encoder. On the basis of the recorded number of increments, the theoretical conveying length can thus be determined.
  • the deviation of the theoretical conveying length from the nominal yarn length, caused by the wear-induced slip-off slip occurring at the pressure roller 14, is compared with a presettable limit value for a permissible deviation.
  • the passage of the limit value is evaluated as an indicator of an intolerable wear of the pressure roller 14 and signaled.
  • the signaling can take place directly at the respective spinning station, but also at a central control device of the spinning machine.
  • the limit value of the deviation from the nominal thread length, the passing of which triggers an indication of intolerable wear can be predetermined by an operator within a range between 5 mm and 30 mm and can be set on the spinning station computer 25 or on a central control device of the textile machine be transferred from there to the spinning station computer 25.
  • the limit When setting the limit, the desired quality of the spun yarn or the piecing plays a role, the lower a limit is specified, the higher the desired quality.
  • the determined theoretical conveying length for a larger number of piecings is statistically recorded and evaluated by the spinning station computer 25.
  • the formed mean value of the theoretical conveying length is compared with the desired thread length and the resulting deviation is then compared with the predetermined limit value. If the deviation of the theoretical conveying length determined exceeds the limit value, the slip occurring no longer depends randomly on the momentary mass of the piecer and the spinning tension, but predominantly on the current state of wear of the pressure roller 14
  • method also allows the detection of the theoretical conveying length of at least one piecer whose deviation from the theoretical conveying length compared with the limit and registered when the limit is exceeded, the detection cyclically or at irregular intervals if necessary by the operator is feasible.
  • the continuous logging of the limit value overflow allows conclusions about the current state of the pressure roller 14.
  • the operator is thus able to find out about the current state of the pressure rollers 14 at each spinning station 1, without having to subject each individual pressure roller 14 to a visual inspection.
  • This allows the timely replacement of the printing rolls 14 before disadvantages in the yarn test values, such as sporadically spinning too coarse yarn due to reduced take-off caused by slippage, increased yarn twist, yarn twist, yarn test values or winding tension, in the package structure or in the package the Anspinnmedicine be recognized.
  • the operator can be signaled directly that an exchange is required to maintain the quality of the manufacturing process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP08003621A 2007-03-31 2008-02-28 Verfahren zum Betreiben einer Kreuzspulen herstellenden Textilmaschine Expired - Fee Related EP1975290B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007015695A DE102007015695A1 (de) 2007-03-31 2007-03-31 Verfahren zum Betreiben einer Kreuzspulen herstellenden Textilmaschine

Publications (3)

Publication Number Publication Date
EP1975290A2 EP1975290A2 (de) 2008-10-01
EP1975290A3 EP1975290A3 (de) 2011-05-11
EP1975290B1 true EP1975290B1 (de) 2012-05-16

Family

ID=39590685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08003621A Expired - Fee Related EP1975290B1 (de) 2007-03-31 2008-02-28 Verfahren zum Betreiben einer Kreuzspulen herstellenden Textilmaschine

Country Status (4)

Country Link
US (1) US7690181B2 (zh)
EP (1) EP1975290B1 (zh)
CN (1) CN101275319B (zh)
DE (1) DE102007015695A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009050582A1 (de) * 2009-10-24 2010-05-20 Oerlikon Textile Gmbh & Co. Kg Verfahren zum Anspinnen einer Offenend-Rotorspinnvorrichtung
DE102010034971A1 (de) * 2010-08-20 2012-02-23 Oerlikon Textile Gmbh & Co. Kg Textilmaschine
IT201700113434A1 (it) * 2017-10-10 2019-04-10 Lgl Electronics Spa Metodo di controllo del consumo di filato in un processo di tessitura
CN115233345B (zh) * 2022-07-06 2023-11-17 杭州临港化纤有限公司 一种加弹机断线检测方法、系统、存储介质及智能终端

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3810365A1 (de) * 1988-03-26 1989-10-05 Schlafhorst & Co W Verfahren und vorrichtung zum ermitteln des spulenumfangs von kreuzspulen und zum verwerten des ergebnisses
DE4030100C2 (de) * 1990-09-22 2000-03-23 Schlafhorst & Co W Verfahren und Einrichtung zum Bestimmen der Änderungen von Kriterien eines automatischen Anspinnvorgangs
DE4235450A1 (de) 1991-11-05 1993-05-06 Rieter Ingolstadt Spinnereimaschinenbau Ag, 8070 Ingolstadt, De Verfahren und vorrichtung zum ermitteln des durchmessers einer spule an einer spinnstelle einer spinnmaschine
DE4431537C2 (de) * 1994-09-03 1997-06-12 Rieter Ingolstadt Spinnerei Verfahren zur Anpressung eines Druckrollers an die Abzugswelle einer Rotorspinnmaschine und Vorrichtung zur Durchführung
DE19955674A1 (de) * 1999-11-19 2001-05-23 Schlafhorst & Co W Anspinnvorrichtung mit einer Auswerteeinrichtung zur Ermittlung von Parametern eines automatischen Anspinnvorgangs
DE10059967B4 (de) * 2000-12-02 2013-03-28 Rieter Ingolstadt Gmbh Verfahren und Anordnung zum Überwachen eines Fadenansetzers an einer Spinnmaschine
DE10139075A1 (de) * 2001-08-09 2003-02-20 Schlafhorst & Co W Offenend-Rotorspinnmaschine
DE102005014887A1 (de) * 2005-04-01 2006-10-05 Saurer Gmbh & Co. Kg Kreuzspulen herstellende Textilmaschine
DE102005045712A1 (de) * 2005-09-24 2007-03-29 Saurer Gmbh & Co. Kg Fadenabzugsrolle für eine Kreuzspulen herstellende Textilmaschine
DE102006004894B4 (de) * 2006-02-03 2018-01-18 Saurer Germany Gmbh & Co. Kg Hilfsfadenführer zum Changieren eines laufenden Fadens im Bereich einer Fadenabzugseinrichtung einer Kreuzspulen herstellenden Textilmaschine

Also Published As

Publication number Publication date
CN101275319B (zh) 2011-06-01
US7690181B2 (en) 2010-04-06
EP1975290A3 (de) 2011-05-11
EP1975290A2 (de) 2008-10-01
CN101275319A (zh) 2008-10-01
DE102007015695A1 (de) 2008-10-02
US20080237385A1 (en) 2008-10-02

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