EP1281959B1 - Eigenoptimierung für fadenführende Maschinen - Google Patents

Eigenoptimierung für fadenführende Maschinen Download PDF

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Publication number
EP1281959B1
EP1281959B1 EP20020011801 EP02011801A EP1281959B1 EP 1281959 B1 EP1281959 B1 EP 1281959B1 EP 20020011801 EP20020011801 EP 20020011801 EP 02011801 A EP02011801 A EP 02011801A EP 1281959 B1 EP1281959 B1 EP 1281959B1
Authority
EP
European Patent Office
Prior art keywords
limit values
thread
yarn
procedure according
frequency
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 - Lifetime
Application number
EP20020011801
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German (de)
English (en)
French (fr)
Other versions
EP1281959A2 (de
EP1281959A3 (de
Inventor
Bernd Bahlmann
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.)
Rieter Ingolstadt GmbH
Original Assignee
Rieter Ingolstadt Spinnereimaschinenbau AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rieter Ingolstadt Spinnereimaschinenbau AG filed Critical Rieter Ingolstadt Spinnereimaschinenbau AG
Publication of EP1281959A2 publication Critical patent/EP1281959A2/de
Publication of EP1281959A3 publication Critical patent/EP1281959A3/de
Application granted granted Critical
Publication of EP1281959B1 publication Critical patent/EP1281959B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D01H13/32—Counting, measuring, recording or registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • B65H63/062—Electronic slub detector
    • 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
    • D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material
    • 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
    • D01H13/26—Arrangements facilitating the inspection or testing of yarns or the like in connection with spinning or twisting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to the technical field described by EP-B 415 222 (Zellweger Luwa), namely a method for setting limit values which cause a separation process in the textile thread (yarn) to re-spin or rewet the yarn spool up and eliminate potential errors or impurities beforehand.
  • limit values GO, GU are exceeded, which trigger a cut.
  • the limits GO, GU are changed.
  • the outer limits can be set to those limits in the mentioned change which were previously only relevant as a benchmark for their They then become the outer limits that lead to real yarn cuts. If the internal limits expect an acceptable frequency of yarn cuts, this expectation will become a reality after changing the outer boundaries.
  • the previously only recorded (virtual) yarn cuts eg by pulse count (claim 5), then become real (actual) Garnroughen whose frequency has been previously tested, without using statistical methods. "Virtual" yarn defects as such have hitherto been used only for quality documentation purposes, cf. CH 680 803 A5 (Zellweger Luwa), Sp. 4 lines 25 to 30, and EP-B 439 768 (Zellweger Luwa), column 3, lines 25 to 37 and column 4, lines 25 to 40.
  • New yarn handling limits can be operationally checked with the invention (claim 12) without yarn loss.
  • the new limit values are the inner or narrower (initially virtual) limit values which, with the yarn running with larger limit values than the yarn cut or real error limit, are of importance only insofar as their exceeding (per impulse) is registered and counted to the frequency. to determine an expected, currently probable frequency of yarn breakages that occur when the initial internal test limits provided for verification become the actual outer limits (yarn breakage limit values).
  • the device (claim 17) can independently adjust the tolerance band of the permissible fluctuation d (t) of the thread thickness, depending on an expected error rate at an initially set for checking inner or narrower tolerance band and depending on the ability to work - ie the availability - of an error-correcting machine.
  • inner, narrower limits tolerance (claim 9) can be specified in terms of various error channels or types of errors. Any one of these inner limits can then be selected for the actual limits that cause thread separation. It may also be a compilation of all available internal limits for the respective types of error, resulting in a composite tolerance band that is initially applied on a trial basis but still during ongoing production.
  • the determination of the tolerable for the respective operating case tolerance band takes place without complex statistical methods, but directly on the yarn treatment, is controlled by the actually running yarn and takes into account the machine with their (current) dynamics.
  • Tolerance band can be understood both absolutely, based on the thread thickness zero and two positive limits for the inner (closer) tolerance band and two positive values for the outer (larger) tolerance band; but it can also tolerances against a yarn number (predetermined yarn thickness) are selected as a comparative scale, then there is a respective tolerance band of a positive and negative value.
  • An inner and outer tolerance band is defined in both applications.
  • the frequency of exceedances is the number of exceeding or falling below a respective limit value (depending on the currently measured yarn thickness). Exceeding the limit of the inner tolerance band leads to a virtual yarn error, so only one count. Exceeding a limit of the external Tolerance band results in an actual separation, the sum of which, based on a given period of time (the frequency of virtual and real yarn slices), gives a value that matches the operating environment and dynamics of the machine. For the formation of the frequencies digitally well-processed moving average value are suitable; however, integrators or low passes can also be used.
  • this control of the machine can also be used for other yarn handling, such as spooling or transport.
  • the yarn thickness d i (t) is fed to a respective measuring circuit 40, which performs a comparison with predetermined limit values d 1 , d 2 and d 3 , d 4 .
  • the multi-limbed comparator provided in the circuit 40 compares the respective yarn thickness according to FIG. 1, where the associated limit values are shown as an inner tolerance band d 4 -d 3 and an outer tolerance band d 2 -d 1 .
  • Exceeding the inner tolerance band reports the comparator block 40 as a virtual yarn error r, shown in Figure 1 and forwarded as a pulse to a counter 50 in Figure 2.
  • the yarn cut is also registered by the counting unit 50 separately from the virtual yarn defects r, and in the long term the counting block 50 outputs two frequencies, once the frequency E (t) for the number of actually occurred yarn defects e per given time unit and the frequency R (t) as the number of virtual yarn errors r with respect to a given period of time.
  • the virtual and real yarn defects r and e are shown in FIG. 1 at their times at which they each occur, namely the exceeding of one of the limit values d 1 to d 4 shown there .
  • a walking machine WA illustrated which is movable along the spinning stations in the y direction, each individually generate a thread 100a with the associated velocity v a. If a yarn cut e occurs in one of the threads, the traveling machine WA is requested by the respective spinning station and it fixes there the yarn error.
  • the walking machine outputs a signal a (t) for the general control, with which it signals its ability to work; if the value a (t) is large, it has little to be required by spinning stations, a (t) is small, so the walking machine WA is busy and is available for additional requests not or only with a time delay.
  • a setpoint E should specify how high the frequency of yarn breakages or yarn cuts may be, taking into account the workability previously signaled by the walking machine WA. If the working capacity is low, only a low setpoint E setpoint can be specified. If the working capacity is high, the setpoint E soll may be higher to produce better quality yarn; In this regard, more frequent yarn cuts are accepted, so narrower limits can be set, which the controller V on the specifications of the respective inner limits d 3 , d 4 and the tracking or repatriation of the respective outer limits d 1 , d 2 makes.
  • FIG. 1 A control cycle should be explained.
  • the starting point is FIG. 1, in which the internal limit values are exceeded at r and this excess occurs with a low frequency R for, for example, the upper limit d 4 arises.
  • the counter block 50 registers a low frequency R (t) for the limit d 4 .
  • R (t) is monitored by the controller V and if the value remains low at a low frequency, the upper limit d 2 of Figure 1 is lowered, preferably the previous one proven virtual limit d 4 ; then there is a high probability that the same virtually measured error rate R (t) will become the actual error rate E (t). This relates to the upper limit d 4 or d 2 of Figure 1.
  • FIG. 3 shows a time diagram which is much longer term than FIG. 1.
  • the axis t has a displayed time duration of several hours and shows how the virtual limit value d 4 in the time intervals A, B, C and D changed.
  • the change was made in the illustrated example of Figure 3 so that the longer term, the limit d4 an acceptable error rate R of the counter block 50 resulted, so that the upper limit d 2 could be tracked.
  • the inner error limit d 4 is adapted and made to a narrower limit value during the time period T B. Again, the error rate R proved more than acceptable, so within the prescribed target value E should. Therefore, the upper limit d 2 is tracked again and set to the value of d4 during the time period B.
  • the inner limit d 4 is then set to a reduced value during the period C.
  • the error rate R is measured and it results in the illustrated example of Figure 3, the result that the actual upper limit d 2 can not be tracked because the frequency R was too high or the frequency of the actual error cuts E during the period C has risen sharply, so that the upper limit d 2 can not remain on the value of the period B, can not be reduced to the virtually tested value for the duration C, but must even be increased, which by tracking the virtual Upper limit d 4 for the time range D, which is lower than the actual upper limit d 2 .
  • the lower limits d 3 , d 1 can be tracked, they can run synchronously with the above-described embodiment and steadily increase, which corresponds to a steadily reduced tolerance band, but they can also go regardless of other ways, depending on the associated error rate R and E.
  • the setpoint can be controlled and ordered set.
  • FIG. 4 illustrates that with three exemplary error channels 61, 62, 60 that issue different inner threshold pairs for N, S, and L errors. These threshold pairs may either be independently monitored or summed together in a summarizer Z to give a total synthesized tolerance band d 3 , d 4 (for the Z-channel).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
EP20020011801 2001-06-18 2002-05-28 Eigenoptimierung für fadenführende Maschinen Expired - Lifetime EP1281959B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001129201 DE10129201A1 (de) 2001-06-18 2001-06-18 Eigenoptimierung für fadenführende Maschinen
DE10129201 2001-06-18

Publications (3)

Publication Number Publication Date
EP1281959A2 EP1281959A2 (de) 2003-02-05
EP1281959A3 EP1281959A3 (de) 2003-12-10
EP1281959B1 true EP1281959B1 (de) 2007-03-07

Family

ID=7688494

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020011801 Expired - Lifetime EP1281959B1 (de) 2001-06-18 2002-05-28 Eigenoptimierung für fadenführende Maschinen

Country Status (3)

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EP (1) EP1281959B1 (cs)
CZ (1) CZ20022040A3 (cs)
DE (2) DE10129201A1 (cs)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008037758B4 (de) * 2008-08-14 2019-09-19 Saurer Spinning Solutions Gmbh & Co. Kg Verfahren zur Qualitätsüberwachung eines längsbewegten Garnes an einer Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine
CZ2022522A3 (cs) 2022-12-12 2024-06-19 Rieter Cz S.R.O. Způsob řízení technologického procesu na dopřádacím stroji, dopřádací stroj k provádění způsobu, počítačový program k provádění způsobu na dopřádacím stroji a počítačem čitelné médium s počítačovým programem

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA942870A (en) * 1970-08-29 1974-02-26 Tsutomu Tamura Apparatus for detecting yarn quality information
DE2820097C3 (de) * 1977-05-23 1980-02-28 Gebrueder Loepfe Ag, Wetzikon (Schweiz) Verfahren zur Bestimmung der Häufigkeit von Garnfehlern
DE3928755A1 (de) * 1989-08-30 1991-03-07 Rieter Ag Maschf Verfahren zur regelung der arbeitsgeschwindigkeit einer ringspinnmaschine
CH681462A5 (cs) * 1989-08-31 1993-03-31 Zellweger Uster Ag
CH680803A5 (cs) * 1990-01-26 1992-11-13 Zellweger Uster Ag
ES2082818T3 (es) * 1990-01-26 1996-04-01 Luwa Ag Zellweger Procedimiento para la evaluacion de la calidad de hilos e instalacion para la realizacion del procedimiento.
EP0877108B1 (de) * 1997-04-23 2003-07-16 Uster Technologies AG Verfahren und Vorrichtung zum Reinigen von Garnen
DE10026389A1 (de) * 1999-09-20 2001-03-22 Schlafhorst & Co W Vorrichtung zur Überwachung von Garnparametern eines laufenden Fadens

Also Published As

Publication number Publication date
EP1281959A2 (de) 2003-02-05
CZ20022040A3 (cs) 2003-02-12
EP1281959A3 (de) 2003-12-10
DE10129201A1 (de) 2002-12-19
DE50209633D1 (de) 2007-04-19

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