EP0650915B1 - Dispositif pour contrôler la qualité de l'enroulement de bobines de fil et utilisation du dispositif dans un bobinoir ou un métier à filer - Google Patents

Dispositif pour contrôler la qualité de l'enroulement de bobines de fil et utilisation du dispositif dans un bobinoir ou un métier à filer Download PDF

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Publication number
EP0650915B1
EP0650915B1 EP94116148A EP94116148A EP0650915B1 EP 0650915 B1 EP0650915 B1 EP 0650915B1 EP 94116148 A EP94116148 A EP 94116148A EP 94116148 A EP94116148 A EP 94116148A EP 0650915 B1 EP0650915 B1 EP 0650915B1
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EP
European Patent Office
Prior art keywords
winding
yarn
bobbin
sensor
detector
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
EP94116148A
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German (de)
English (en)
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EP0650915A1 (fr
Inventor
Alfred Aschmann
Rolf Hensel
Hans Dr. Wampfler
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.)
Zellweger Luwa AG
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Zellweger Luwa AG
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Publication of EP0650915A1 publication Critical patent/EP0650915A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/006—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package quality control of the package
    • 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
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
    • B65H63/028—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element
    • B65H63/032—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic
    • B65H63/0321—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators
    • B65H63/0324—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators using photo-electric sensing means, i.e. the defect signal is a variation of light energy
    • 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 present invention relates to a device for checking the winding quality of yarn packages, with a sensor that a light source for illuminating part of the surface of a Spool of thread, means for imaging the illuminated part a detector, and an evaluation circuit for the detector generated signals.
  • a device of this type known from DE-A-42 16 729 is designed as a test chamber, inside of that by CCD cameras formed surface or image sensors are arranged. The too The examining coil rests on a stand during the examination and is illuminated by two light sources like headlights. How DE-A-41 12 073 shows that the test chamber is central arranged for an entire spinning mill in the area of an interim storage facility. That means the coil test at a time takes place where an insufficient winding quality is no longer corrected can be, but the coil in question as a reject must be eliminated. Apart from that, can be known with this Device only the state of the outermost thread layer of the Coil are checked and there are no statements about the winding quality inside the spool is possible. It is therefore not exclude and it is even likely that of this Device rated as good spools of poor winding quality can have.
  • the invention is now intended to provide a coil testing device with which the winding quality of the whole, but at least a large part of the coil in question is monitored can be.
  • the coil device should be like this be trained that bad winding quality is not necessarily causes the coil in question to be unusable is eliminated, but that corrective interventions in the Coil are possible.
  • test device there is therefore not one in the test device according to the invention single, central test chamber provided, the time after the Spinning or winding process is loaded with the finished bobbins, but there are many decentralized sensors on the spinning or Winding machine available, which the winding quality during manufacture monitor the coils. That means the winding quality is also monitored inside the coil, and that corrective Interventions in the manufacturing process are possible. If considering that rotor spinning and winding machines on everyone Have an electronic yarn cleaner in the spinning or winding position, then there is also the possibility of a connection the testing device according to the invention for the winding quality with the yarn cleaning system, which results in additional quality statements can result.
  • the invention further relates to a use of the device mentioned on one with an electronic yarn cleaning system equipped winding or spinning machine.
  • This use is characterized in that the signals of the device for Checking the winding quality and those of the yarn cleaning system evaluated with mutual consideration and a functional relationship between the two institutions will be produced.
  • Fig. 1 with the reference numeral 1 is a ring spinning machine and with the reference numeral 2 denotes an automatic winder.
  • the spinning mill are several, for example 40 spinning machines 1 and Automatic winder 2 provided, and each spinning machine 1 and each Automatic winder 2 each comprises a number of spinning or winding positions.
  • Spinning bobbins 3 are produced on the spinning machines 1, through a transport system to the automatic winder 2 are transported where the spinning bobbins 3 rewound to 4 packages become. If it is not a ring, but one Rotor spinning mill, then the spinning machines produce directly Cross-wound bobbins and no automatic winder are required.
  • the full packages 4 are replaced by a package changer 5 removed from the automatic winder 2 and from a loading device 6 of a transport device shown in dashed lines 7 passed.
  • the transport device 7 conveys the packages 4 in the direction of the arrow up to an unloading device 8 which the packages from the transport device 7 takes over and feeds a test station 9.
  • the state is in the test station 9 the surface of the thread layers of the winding visually from a machine guard and an optical test facility. Coils with unacceptable faults are sorted out and get into a suitable container 10 for rejects, and the coils of suitable quality are made with one Label E, sort and go to an interim storage facility 11.
  • This type of control of packages in a production process subordinate, central test station is the state of the Technology and described for example in DE-A-41 12 073.
  • a suitable optical test device is from DE-A-42 16 729 known.
  • the package winding test system according to the present patent application differs from the mentioned prior art among others in that the control of the packages is no longer in one test station downstream of the production process, but during the production process and preferably in Cross-coil changer area 5. With regard to minimization of costs, it is recommended to use a hiking sensor which serves several winding positions.
  • the hiking sensor can either on the package changer, or if there is none, on a suitable hiking facility be mounted. There is a on a winder Cross-wound bobbin changer for 30 or 60 bobbin positions, on a rotor spinning machine for about 120 spinning positions. If one assumes that a winding machine for production a bobbin takes about 90 minutes, then, depending on Speed of the package changer, each bobbin during checked their manufacture about 50 to 90 times. For rotor spinning machines is due to the lower production speed the test frequency is two to three times higher. This is even in the worst case, by orders of magnitude more than in the prior art, where practically only the outermost thread layer is checked. Of course, everyone can A separate sensor is provided for the winding or rotor spinning position his.
  • Fig. 2 three cross-wound bobbins 4 are shown, the straight with Yarn G are spooled.
  • the representation of the cheese 4 is greatly simplified.
  • a groove drum arranged through which the respective Cheese is driven.
  • One of the signals from the two sensors can be Desired speed of the yarn G are derived.
  • the yarn passes through the measuring heads 12 in a known manner
  • Yarn cleaning system for example of the USTER POLYMATIC type (USTER - registered trademark of Zellweger Uster AG).
  • Such a yarn cleaning system contains a central control device 13 and one per measuring head 12 with the respective measuring head 12 and evaluation unit 14 connected to control unit 13 the central control device 13 are up to 84 evaluation units 14 connected.
  • This sensor which will be explained later with reference to FIGS. 3 to 5 to be illuminated, the cross-wound bobbins 4 and forms them a detector.
  • Whose signals are corresponding Evaluation circuit 16 supplied.
  • the evaluation circuit 16 in the manner of the evaluation unit 14 trained of the yarn cleaning system and on the Cross-wound bobbin changer 5 mounted.
  • the output of the evaluation circuit 16 is with a central control unit, as shown connected to the control unit 13 of the yarn cleaning system.
  • the check of the winding quality of the packages 4 has Goal, winding errors of the packages and thus faulty production sites to recognize. This can result in a coil fault classification the cross-wound bobbins 4 and the bobbins can with corresponding quality data are marked.
  • the mark is preferably done by contactless entry of the quality data in a arranged on the coil, by a machine writable and readable electronic memory chip formed Information carrier, the label E of that shown in Fig. 1 would complement or replace 4 bobbin.
  • the coil testing system also offers the possibility upon detection of an error directly in the production process intervene and cut out the incorrectly wound thread (Winding machine) or production on the concerned Interrupt rotor position (rotor spinning machine).
  • Winding machine incorrectly wound thread
  • rotor spinning machine production on the concerned Interrupt rotor position
  • Defective pieces of yarn are identified by specifying the Yarn cleaner or the bobbin inspection system through the on the bobbin and existing suction devices on the rotor spinning machine away.
  • the coil testing device shown in principle an autonomous test facility that does not conform to the Presence of a yarn washer, and that too completely independent of the type or measuring principle of the thread cleaner is.
  • the coil tester does not need one formed on the cross-coil changer 5 arranged hiking sensor 15, but there could also be a corresponding one at each production site Sensor should be provided.
  • Prerequisite for using the in Figs. 3 to 5 sensors shown in a central test station would be one Device for rotating the coils.
  • the package changer 5 can take on further control tasks. For example each package 4 weighed by the bobbin changer 5 and from the Weight with known thread number the length of the wound thread be determined.
  • the bobbin error rate is made up of the yarn errors (Yarn cleaner) and from the errors of the winding (bobbin inspection system) together. Both types of error together provide a measure of all Fault or the quality of a coil.
  • the control the coil density is known to be done by a machine Thread tensioning device, by balloon control or by regulation the winding speed depending on the unwinding condition the cop.
  • Basic sizes for the mentioned control the bobbin density is the exact bobbin length (determined from various speed measurements), thread laying, the absolute thread number and the bobbin diameter.
  • the coil density and their course within the coil is also a measure of the thread tension and can be used to control this if there is control of the thread laying.
  • the coil testing device from Fig. 2 can be easily recognized.
  • the high rotation speed of the coils cause either stroboscopic lighting and as Detector a camera with image processing or an evaluation circuit 16 with a correspondingly fast signal processing is used.
  • the one common sensor 15 monitored coils 4 generally different Have diameters, what with a possible illustration the coil surface on the receiver got to. This can be done by the sensor either one sufficiently large depth of field or an auto focus system has, because of the relative size of the distance differences practically only an autofocus system comes into question. there can use the autofocus setting signal as a distance measurement signal used and derived from this the coil diameter become.
  • sensor 15 mounted on the package changer 5 can only view certain parts of the package, in particular the end faces thereof, at an oblique angle.
  • the well-known Scheimpflug principle can be used for the image, for example.
  • image distortion must be compensated for by what appropriate shaping of the sensor elements, or mathematically can be done.
  • the latter means that the detector is for one straight line is calibrated and that deviations from this be compensated arithmetically.
  • a light gap 17 is formed in this sensor from a light source 18, for example a light emitting diode (LED) projected onto the area to be examined. It is this area around the outer surface, then the light gap 17 preferably projected parallel to the coil axis (arrangement according to Fig. 3a), if it is an end face, then the Projection radial to the coil axis.
  • a light source 18 for example a light emitting diode (LED) projected onto the area to be examined. It is this area around the outer surface, then the light gap 17 preferably projected parallel to the coil axis (arrangement according to Fig. 3a), if it is an end face, then the Projection radial to the coil axis.
  • the surface to be checked is placed on a with the light gap Detector line 19 shown, the direction of illumination and imaging have to be different.
  • the individual elements the detector row are on lateral shifts in the light distribution sensitive.
  • PSD position sensitive detector
  • a double wedge detector 3b can be used.
  • the latter exists a number of double wedges, each of which is a detector element forms.
  • the output signals of the two double wedges each Detector elements are linked together, and the result Va of this connection is zero volts if the image 17 'of the Light gap 17 is in the middle of the detector element.
  • With off-center Position is Va proportional to the deflection of the image 17 'in the one designated by an arrow in FIGS. 3a and 3b Direction.
  • FIGS. 3a and 3b is a modified one Triangulation method for distance measurement; in Fig. 4a shows a real triangulation process.
  • a light gap 17 is not projected onto the coil surface, but a pinhole 20, so a point of light, where the projection plane is oriented in the direction of the coil axis.
  • the point of light projected obliquely onto the coil surface becomes imaged on a detector 19 (diode row, double wedge, PSD), the deflection is in turn a measure of the distance.
  • a detector 19 diode row, double wedge, PSD
  • Image interference on the outer surface of the coil 4 can with a Height profile measurement according to 4b, taking a sufficiently large one Local resolution is a prerequisite for this procedure.
  • Difference to the wrap which is an increase in the form of a on the Forms circumferential thickness ring
  • an image disturbance manifests itself as an increase in the thread laying track, this increase in the rotating spool in synchronism with the rotation period hikes up and down. If the on the coil surface projected light beam hits such an elevation, then the point of impact of the light beam shifts to the Detector by the amount ⁇ x.
  • Fig. 3a and 4b where both wrap and image disturbance shift of the light beam impinging on the detector 19, can wrap and image disturbance by appropriate evaluation of the time and position dependent signal become.
  • 5a and 5b show examples of the detection of discounts or threads that are known to stretch on the End faces.
  • an oblique or grazing lighting chosen so that the threads through the long shadow cast a stronger contrast.
  • a section of the end faces is placed on a line sensor 21 shown, which is either off-center (Fig. 5a) or radial (Fig. 5b) is arranged to the coil axis.
  • the individual elements the line sensor consist of narrow light receivers, for example Photodiodes, the width of which is that of the shadow corresponds.
  • An existing tension thread 22 is whether it is stretched (Fig. 5b) or deflected (Fig. 5a) while each revolution exactly once or twice those 1 to 2 photodiodes cover that correspond to its distance from the turning center. At this moment, one is on the detector element in question clear signal and the tension thread 22 can be based on the Falling below a threshold value can be detected.
  • the each Area outside the image of the coil face of the line sensor 21 is not taken into account in the evaluation. With an interconnected multiple arrangement of lines you can relate to the coil diameter to a certain extent to adjust.
  • one relative to one compared to the coil face small line sensor behind a transparent LCD screen use arranged large-area detector, or one maps the LCD screen to a smaller detector.
  • the obliquely illuminated face is on the LCD screen, which is, for example, a display without a backplane mirror and the screen is controlled so that only one at a time narrow line is transparent.
  • This line traverses across the Screen, the measurement time per line position at least one Coil revolution is.
  • This arrangement has the advantage that The length and width of the lines are easy to program and that the line length is optimally adapted to the coil size can.
  • Another variant of a measuring arrangement could consist of the area to be checked (coil jacket and / or end faces) to illuminate at an angle and on a parallel to the coil axis Map photodiode array.
  • the one from the oblique lighting resulting long shadow cast at the exit gives the Photodiodes a waveform from which a variety of winding errors is recognizable.
  • This method will not all Detect winding faults, but it is simple and also inexpensive. And it will, like all described online methods the well-known system under the central test chamber with respect to the meaningfulness of the measurement results by orders of magnitude surpass.
  • the so-called ambiguity is determined by means of a color analysis of the yarn measured on the outer surface, either different Waves of light radiated in and the reflection light analyzed with a detector or illuminated with white light and the reflection light with multiple detectors with different Color filtering is analyzed. You can also use infrared or work with fluorescence radiation. In any case, with everyone Passing the bobbin changer measured the color value for each bobbin and saved and compared with previous measurements, where above a certain deviation between the values Alarm is triggered.
  • the coil diameter can also be measured, using standard methods such as triangulation or correction signal of the autofocus.
  • the general rule is that the sensors and evaluations of the yarn cleaning system included in the coil test as an online early warning system are, and that the actual coil testing system one enables precise qualification of the errors.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (16)

  1. Dispositif pour contrôler la qualité de l'enroulement de bobines de fil (4), avec un capteur (15) qui comporte une source de lumière (18) pour éclairer une partie de la surface d'une bobine de fil (4), des moyens pour représenter la partie éclairée de la surface sur un détecteur et un circuit d'exploitation pour les signaux produits par le détecteur, caractérisé en ce qu'au moins un capteur (15) du type précité pour les postes de filature ou de bobinage est disposé de manière décentrée à une machine de filature ou de bobinage, en ce que le capteur est orienté vers une enveloppe des bobines de fil (4) et que de ce fait, ces bobines de fil (4) sont également surveillées à l'intérieur des bobines.
  2. Dispositif selon la revendication 1, caractérisé en ce qu'un capteur (15) est disposé à chaque poste de filature ou de bobinage.
  3. Dispositif selon la revendication 1, avec des changeurs de bobine servant respectivement plusieurs postes de production pour retirer les bobines pleines, caractérisé en ce que les capteurs (15) sont montés sur les changeurs de bobine (5) et sont associés à la manière d'un capteur mobile respectivement à plusieurs postes de production.
  4. Dispositif selon la revendication 2 ou 3, caractérisé en ce que la source de lumière (18) du capteur (15) est disposée de façon à produire un éclairage en biais ou rasant de la surface de la bobine de fil (4).
  5. Dispositif selon la revendication 4, caractérisé en ce que la surface de la bobine de fil (4) est éclairée par une fente lumineuse (17) et que l'image (17') de cette fente lumineuse est représentée sur le détecteur (19).
  6. Dispositif selon la revendication 4, caractérisé en ce que la surface de la bobine de fil (4) est éclairée par points à travers un sténopé (20), et que ce point lumineux est représenté sur le détecteur (19).
  7. Dispositif selon la revendication 5 ou 6, caractérisé en ce que le détecteur (19) est constitué par une ligne de capteur, de préférence par un capteur à coin double.
  8. Dispositif selon la revendication 5 ou 6, caractérisé en ce que le détecteur (19) est un détecteur sensible aux positions (PSD).
  9. Dispositif selon la revendication 4, caractérisé en ce que pour la détection de fils tendus (22), une découpe radiale des faces frontales des bobines (4) est représentée sur un détecteur (21) constitué de récepteurs de lumière en forme de lignes ou pouvant être éclairées en forme de lignes, la largeur des lignes correspondant approximativement à la largeur de la projection d'ombre d'un fil tendu.
  10. Dispositif selon la revendication 4, caractérisé en ce que le détecteur (19) est constitué par une rangée de photo-diodes disposée parallèlement à l'axe de la bobine (4).
  11. Utilisation du dispositif selon la revendication 1 dans une machine de bobinage ou de filature équipée d'une installation d'épuration de fil électronique, caractérisée en ce que les signaux du dispositif pour contrôler la qualité d'enroulement et ceux de l'installation d'épuration du fil (12, 13, 14) sont exploités par une prise en considération mutuelle et qu'un rapport fonctionnel est établi entre les deux dispositifs.
  12. Utilisation selon la revendication 11, caractérisée en ce que l'installation d'épuration de fil (12, 13, 14) mesure la vitesse du fil et contrôle les oscillations, et en ce que des oscillations anormales sont interprétées comme constituant un indice d'un défaut d'enroulement et activent de préférence le capteur associé (15) du dispositif pour contrôler la qualité d'enroulement.
  13. Utilisation selon la revendication 12, caractérisée en ce que l'installation d'épuration de fil (12, 13, 14) mesure la vitesse du fil et l'intègre en continu, et que le dispositif de contrôle de la qualité d'enroulement mesure le diamètre des bobines (4), et en ce que les deux valeurs de mesure sont enchaínées pour obtenir l'allure de profil de la densité de la bobine.
  14. Utilisation selon la revendication 11, caractérisée en ce qu'on mesure la vitesse de fil momentanée et qu'on l'examine par une analyse spectrale en vue de modifications de fréquence, en ce que des composantes de fréquence se situant à l'extérieur d'une limite donnée sont classées comme défauts du rouleau et que la qualification des défauts a lieu par le dispositif de contrôle de la qualité du rouleau.
  15. Utilisation selon la revendication 14, caractérisée en ce qu'on utilise des processeurs de signaux numériques pour l'analyse spectrale.
  16. Utilisation selon la revendication 14 ou 15, caractérisée en ce qu'on mesure en plus de la vitesse de fil momentanée encore d'autres vitesses, notamment la vitesse de rotation et la vitesse de pose du fil du tambour rainuré entraínant la bobine croisée (4) et en ce que ces vitesses sont soumises à une analyse spectrale.
EP94116148A 1993-10-29 1994-10-13 Dispositif pour contrôler la qualité de l'enroulement de bobines de fil et utilisation du dispositif dans un bobinoir ou un métier à filer Expired - Lifetime EP0650915B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH326293 1993-10-29
CH03262/93A CH686779A5 (de) 1993-10-29 1993-10-29 Vorrichtung zur Ueberpruefung der Wickelqualitaet von Garnspulen und Verwendung der Vorrichtung an einer Spul- oder Spinnmaschine.
CH3262/93 1993-10-29

Publications (2)

Publication Number Publication Date
EP0650915A1 EP0650915A1 (fr) 1995-05-03
EP0650915B1 true EP0650915B1 (fr) 2001-01-10

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EP94116148A Expired - Lifetime EP0650915B1 (fr) 1993-10-29 1994-10-13 Dispositif pour contrôler la qualité de l'enroulement de bobines de fil et utilisation du dispositif dans un bobinoir ou un métier à filer

Country Status (7)

Country Link
US (1) US5636803A (fr)
EP (1) EP0650915B1 (fr)
JP (1) JPH07172699A (fr)
CN (1) CN1079776C (fr)
AT (1) ATE198587T1 (fr)
CH (1) CH686779A5 (fr)
DE (1) DE59409633D1 (fr)

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CN1079776C (zh) 2002-02-27
DE59409633D1 (de) 2001-02-15
JPH07172699A (ja) 1995-07-11
ATE198587T1 (de) 2001-01-15
CH686779A5 (de) 1996-06-28
CN1106536A (zh) 1995-08-09
EP0650915A1 (fr) 1995-05-03
US5636803A (en) 1997-06-10

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