EP2147138B1 - Ligne de bancs d'étirage ou un banc d'étirage et son procédé de fonctionnement - Google Patents

Ligne de bancs d'étirage ou un banc d'étirage et son procédé de fonctionnement Download PDF

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Publication number
EP2147138B1
EP2147138B1 EP08734486.7A EP08734486A EP2147138B1 EP 2147138 B1 EP2147138 B1 EP 2147138B1 EP 08734486 A EP08734486 A EP 08734486A EP 2147138 B1 EP2147138 B1 EP 2147138B1
Authority
EP
European Patent Office
Prior art keywords
speed
torque
godets
motors
motor
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.)
Active
Application number
EP08734486.7A
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German (de)
English (en)
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EP2147138A1 (fr
Inventor
Rolf Schröder
Michael Breidert
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.)
Truetzschler Nonwovens GmbH
Original Assignee
Truetzschler Nonwovens GmbH
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.)
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Publication date
Application filed by Truetzschler Nonwovens GmbH filed Critical Truetzschler Nonwovens GmbH
Priority to PL08734486T priority Critical patent/PL2147138T3/pl
Publication of EP2147138A1 publication Critical patent/EP2147138A1/fr
Application granted granted Critical
Publication of EP2147138B1 publication Critical patent/EP2147138B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
    • D01G1/06—Converting tows to slivers or yarns, e.g. in direct spinning
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
    • D01G1/06—Converting tows to slivers or yarns, e.g. in direct spinning
    • D01G1/08—Converting tows to slivers or yarns, e.g. in direct spinning by stretching or abrading
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/30—Drafting machines or arrangements without fallers or like pinned bars incorporating arrangements for severing continuous filaments, e.g. in direct spinning
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll

Definitions

  • the invention relates to a method and a device for operating a drafting line or a drafting system according to the preamble of the method or the device claim.
  • the EP 1 522 613 A describes a device for producing synthetic fiber staple yarn.
  • the stretching machine positions have individually drivable rollers. Each of these rollers is coupled to a drive motor driven by a converter.
  • the spinning machine after EP 0 392 194 A shows rollers of a drafting system, which is driven individually. To detect the position of the rollers they are coupled with angle and speed sensors. The movement of the rollers is done depending on the angular position and the speed.
  • the invention has the object to improve a method and an apparatus for driving a drafting system according to the preamble of the method or device claim and to expand the application possibilities.
  • the drive of each draw roll takes place via a separate drive device, which can be controlled via an actuator to a respectively required torque for driving the corresponding draw roll.
  • a separate drive device which can be controlled via an actuator to a respectively required torque for driving the corresponding draw roll.
  • the cumulative speed ratio between the first inlet and the last outlet stretch roller is between 1: 3 and 1: 4.
  • the drive of the individual drafting rollers or godets not centrally via a drive device, but each godet is driven individually, the drafting can be operated differentiated. It is also advantageous that the drives within a drafting system are approximately equal and the load distribution can be made uniform. By the individual drive, the slip can be significantly reduced.
  • the motors are designed as asynchronous drives and the control / regulating device comprises a frequency converter (inverter, frequency converter) together with the motor coupled speed sensor via the frequency converter, the setting of the required speed and thus also on the torque to each one Galette.
  • the frequency converter With the help of the frequency converter, the required optimum speed can be set for each individual motor.
  • field-oriented converters are used. These consist of a speed controller based on a lower-level current controller.
  • the mower characteristic values are stored or possibly even automatically determined and adapted. This has the advantage that there does not have to be separate RPM measurement and feedback to control RPM and torque.
  • the recirculated variable used for regulation is rather exclusively the instantaneous current. On the basis of its size and phase position to the voltage all required engine conditions (speed, slip, torque and even the thermal power loss) can be determined.
  • a disturbance occurs, for. As a demolition of the cable during the stretching, so this is also detected as a disturbance variable via a speed sensor and / or with the help of the frequency converter, generates an error message and the system can switch off automatically.
  • the speed and / or the torque of each of the motors is detected and compared with predetermined values, which can only result in an accident (sudden increase in speed). These values are determined and stored.
  • the corresponding motors can be optimally dimensioned, the engine power fully deployed and thus the costs reduced. Furthermore, the field of application of such a system expands, and the frequency of disturbances is also avoided.
  • the frequency converter associated with the motor compares the actual torque with the target torque, and then adjusts the drive speed of the corresponding motor.
  • an optimal drive setting of all the motors or the setting of the desired drive torque of each motor is carried out automatically by means of a stepwise approach or iteration to a desired torque curve or desired torque curve.
  • FIG. 1 shows the principle of the construction of a drafting mill 1 known per se with drafting rollers or godets 2, which are arranged in two drafting units 1.1, 1.2. In the two drafting units 1.1 and 1.2 each seven godets 2 are arranged.
  • the godets 2 of the drafting systems 1.1, 1.2 via a central drive device or via an associated engine 3.1, 3.2 and a symbolically represented gear in the respective frame 4.1, 4.2 driven.
  • Fig. 3 the drafting line 1 according to the invention with a total of fourteen godets 2 is shown.
  • the drafting line 1 according to this embodiment consists of a first drafting system 1.1 and a second drafting system 1.2.
  • Fig. 3 are individual motors 31.1, 31.2, ... 32.14 in the drafting systems 1.1, 1.2 each received in a holder 5.1, 5.2, which also rotatably support the godets 2.
  • the brackets 5.1, 5.2 are shown only schematically.
  • FIG. 3 On the piece sheet with FIG. 3 is like the figure sheet with FIG. 2 in each case the overall arrangement of the drafting line 1 as FIG. 1 represented, so that the assignment of the drives 31.1, 31.2, ... 32.14 to the fourteen godets of the two drafting systems 1.1, 1.2 can be seen.
  • Each motor 31.1, 31.2 ... 32.14 which is preferably designed as a water-cooled motor, is used for direct drive of a single Galette 2.
  • a joint, a propeller shaft or a self-aligning bearing is provided between the drive shaft of the motor 3 and the drive shaft of the godet 2, whereby lateral offset or caused by bending moments effects are compensated.
  • the solid line shows a higher, the dashed line a lower draw ratio.
  • FIGS. 5 and 6 The course of the force exerted by the cable 6 on the godets 2 torques M (starting from a mean torque) is shown in the diagrams of FIGS. 5 and 6 played.
  • the bars shown in solid lines according to Fig. 5 correspond to a higher and the dashed lines in Fig. 6 a lower stretch ratio - see the in FIG. 4 in solid or dashed lines speeds.
  • Fig. 4 illustrates that the first drafting device 1.1 is driven slower than the second drafting system 1.2, so that the in Fig.1 schematically shown cable 6 are stretched.
  • the torque absorption of the second drafting system 1.2 in the total is higher than the torque absorption of the first drafting system 1.1.
  • the difference in the torques of the first and second drafting systems 1.1 and 1.2 represents the friction heat or the stretching force required to stretch the cable or the filaments 6.
  • the stretching of the molecules of a filament requires a certain stretching force. By stretching the molecule of a filament, a certain friction between the individual molecules is generated, so that the filaments or the cable can heat up to about 100 ° C.
  • FIG. 5 shows the distribution of the torques M of a total of fourteen godets 2 in the two drafting units 1.1, 1.2 (see. Fig. 4 - solid line).
  • FIG. 6 gives the torque distribution at a smaller draft ( Fig. 4 - dashed line).
  • the maximum and minimum torque values are marked M 1max, M 2max, M 2min etc.
  • the last drive roller of the last godet 2 of the first drafting system 1.1 and the first drive roller of the first godet 2 of the second drafting system 1.2 is wrapped by the cable 6 only 90 °, so that there is no full torque transmission at this point. This also implies that at this point an increased slip occurs. Since the cable 6 can slip over the surface of the godet 2 at these points, this godet wears more heavily and does not transmit the full torque.
  • the tensile forces on the last godet 2 of the first drafting system 1.1 and on the first godet 2 of the second drafting system 1.2 are therefore usually slightly lower than at the adjacent godets 2, therefore usually slightly lower than at the adjacent godets 2.
  • it is advantageous that Producing a better stiction the surface of these godets is chromed or has a ceramic layer.
  • the drives are designed individually for each maximum demand of the associated godets 2 by the drive speeds are individually graded and thus for each godet 2 a predeterminable or ideal drive torque is provided.
  • M d is the average torque
  • M is the torque of a motor
  • N is the number of drives for driving a single godet 2.
  • the individual motors 31.1-32.14 are designed for the respective maximum torque of a godet 2. With the aid of a frequency converter, the necessary speeds V 1 and V 2 can be monitored and adjusted in order to achieve the desired extension of the cable 6. For this purpose, a torque control is used to drive all the motors 31.1-32.14.
  • the previously determined M d is the target torque for the drive of all motors, compare this FIGS. 7 and 8 ,
  • V 1 is the initial velocity corresponding to the desired extension of the cable 6 to the following values Fig. 7 is gradually raised to achieve the desired extension. If the actual torque deviates from the setpoint torque, the current speed is iteratively adjusted to the setpoint speed using the control.
  • Fig. 7 As can be seen, the cable 6 can be forgiven slightly at the beginning because it can still be stretched very much. The more the cable 6 has been stretched, the higher the torque required to drive the corresponding motor 3, since the stretching forces increase as the elongation increases. The speed gradations are much larger in the godets one to seven than the speed gradations in the following godets.
  • the torques of the godets 2 are scanned several times per unit time, in order to adjust the drive speed for the individual godets 2 in this way.
  • the signal sampled by the control represents the control variable for determining the required drive speed and thus for determining the required torque of the godets 2.
  • the drive system is continuously optimally adjusted to the required conditions after a short break-in period. As a result, only as much drive energy is provided as is necessary to drive each individual motor 3. Oversizing the drive device can by the control or regulation according to the invention with the aid of the control cam according to Fig. 7 be avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Coiling Of Filamentary Materials In General (AREA)
  • Control Of Multiple Motors (AREA)
  • Metal Extraction Processes (AREA)

Claims (9)

  1. Procédé servant à faire fonctionner une ligne de bancs d'étirage ou un banc d'étirage servant à étirer des câbles constitués de fils à base de polymère à l'aide de plusieurs cylindres d'étirage entraînés,
    sachant que chaque cylindre d'étirage (2.1, 2.2) est commandé individuellement sur une valeur de mouvement prédéfinie, caractérisé en ce que le couple réel de chaque moteur (3.1, 3.2) est détecté, est comparé à une valeur de consigne prédéfinie, et en ce qu'une commande du moteur (3.1, 3.2) concerné est effectuée de manière correspondante.
  2. Procédé selon la revendication 1,
    caractérisé en ce que chaque cylindre d'étirage (2.1, 2.2) est commandé à une valeur de vitesse de rotation prédéfinie.
  3. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que la vitesse de rotation et le couple de rotation de chacun des moteurs (3.1, 3.2) sont détectés et sont comparés à des valeurs prédéfinies, et en ce qu'un dépassement des valeurs est évalué comme un incident.
  4. Procédé selon la revendication 3,
    caractérisé en ce qu'une mise à l'arrêt des moteurs (3.1, 3.2) est effectuée en cas d'incident.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé par :
    a) une première galette (2) est entraînée à une vitesse (V1) préalablement fixée, en outre la vitesse de la dernière galette et ce faisant le rapport d'étirage sont fixés ;
    b) l'installation est lancée avec un étirage de démarrage pouvant être sélectionné librement, sachant que l'augmentation de la vitesse est linéaire ou est répartie selon une sélection libre sur les diverses galettes ;
    c) le câble (6) est posé sur les galettes et l'optimisation du couple de rotation est lancée ;
    d) l'entraînement des diverses galettes (2) est surveillé sans interruption, et les couples de rotation réels sont comparés aux couples de rotation théoriques moyens calculés, puis la vitesse correspondante est réglée, tandis que la vitesse de l'installation est augmentée de manière à s'établir à la vitesse finale (V2),
    e) les vitesses sont détectées, sont reportées sur une courbe théorique et sont utilisées lors du prochain lancement afin d'accélérer l'opération de démarrage.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un réglage d'entraînement optimal de tous les moteurs (3.1, 3.2) ou le réglage des couples d'entraînement souhaités des moteurs (3.1, 3.2) est effectué à l'aide d'une approximation ou itération progressive d'une courbe de couple de rotation de consigne.
  7. Ligne de bancs d'étirage ou banc d'étirage servant à étirer des câbles constitués de fils en polymère à l'aide de plusieurs cylindres d'étirage pouvant être entraînés, servant à la mise en oeuvre du procédé selon la revendication 1, sachant qu'un dispositif d'entraînement (3.1, 3.2) pouvant être commandé séparément est associé à chaque cylindre d'étirage (2.1, 2.2), caractérisé(e) en ce que tous les dispositifs d'entraînement, qui sont réalisés sous la forme de moteurs, peuvent être commandés au moyen d'une commande de couples de rotation, sachant que le couple réel d'un moteur est détecté, est comparé à une valeur de consigne prédéfinie, et qu'une commande du moteur est effectuée de manière correspondante.
  8. Ligne de bancs d'étirage ou banc d'étirage selon la revendication 7, caractérisé(e) en ce qu'un capteur de vitesse de rotation est associé à chaque cylindre d'étirage (2.1, 2.2).
  9. Ligne de bancs d'étirage ou banc d'étirage selon la revendication 7 ou 8, caractérisé(e) en ce que les dispositifs d'entraînement (3.1, 3.2) sont réalisés sous la forme de moteurs asynchrones pourvus de convertisseurs de fréquence associés.
EP08734486.7A 2007-05-24 2008-04-15 Ligne de bancs d'étirage ou un banc d'étirage et son procédé de fonctionnement Active EP2147138B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08734486T PL2147138T3 (pl) 2007-05-24 2008-04-15 Zespół mechanizmu rozciągowego, bądź mechanizm rozciągowy, i sposób jego eksploatacji

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007024350 2007-05-24
PCT/DE2008/000663 WO2008141602A1 (fr) 2007-05-24 2008-04-15 Procédé et dispositif permettant de faire fonctionner une ligne de bancs d'étirage ou un banc d'étirage

Publications (2)

Publication Number Publication Date
EP2147138A1 EP2147138A1 (fr) 2010-01-27
EP2147138B1 true EP2147138B1 (fr) 2015-06-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08734486.7A Active EP2147138B1 (fr) 2007-05-24 2008-04-15 Ligne de bancs d'étirage ou un banc d'étirage et son procédé de fonctionnement

Country Status (8)

Country Link
US (2) US20100072650A1 (fr)
EP (1) EP2147138B1 (fr)
JP (1) JP5470244B2 (fr)
CN (1) CN101668884B (fr)
BR (1) BRPI0812151B1 (fr)
ES (1) ES2546085T3 (fr)
PL (1) PL2147138T3 (fr)
WO (1) WO2008141602A1 (fr)

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DE102009009107A1 (de) 2009-02-16 2010-08-19 Fleissner Gmbh Verfahren und Vorrichtung zum Verstrecken von Kabeln
DE102009015265A1 (de) 2009-03-26 2010-09-30 Fleissner Gmbh Streckwerk
MX2011001458A (es) * 2011-02-08 2012-08-30 Rodolfo Villalobos Davila Equipo industrial para reciclado de mezclas asfalticas en caliente.
DE102011012513A1 (de) 2011-02-25 2012-08-30 Trützschler Nonwovens Gmbh Streckwerk
DE102015002133A1 (de) 2015-02-19 2016-08-25 Oerlikon Textile Gmbh & Co. Kg Verfahren zum Antreiben einer Walzengruppe und Walzengruppe
CN105831806B (zh) * 2016-06-06 2022-12-27 张家口市东力机械制造有限责任公司 成形机丝预拽松送料装置
CN107254750B (zh) * 2017-06-16 2024-04-26 惠州市泓融新型材料有限公司 一种节约油量的加弹机上油装置
WO2019101717A1 (fr) * 2017-11-25 2019-05-31 Oerlikon Textile Gmbh & Co. Kg Procédé de surveillance d'un dispositif d'enroulement et dispositif d'enroulement

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Also Published As

Publication number Publication date
BRPI0812151B1 (pt) 2018-06-12
US20140353866A1 (en) 2014-12-04
BRPI0812151A8 (pt) 2017-04-04
US20100072650A1 (en) 2010-03-25
PL2147138T3 (pl) 2015-11-30
BRPI0812151A2 (pt) 2014-11-18
US9657414B2 (en) 2017-05-23
JP5470244B2 (ja) 2014-04-16
JP2010529305A (ja) 2010-08-26
CN101668884A (zh) 2010-03-10
CN101668884B (zh) 2011-12-07
EP2147138A1 (fr) 2010-01-27
WO2008141602A1 (fr) 2008-11-27
ES2546085T3 (es) 2015-09-18

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