EP0411379B2 - Dispositif d'étirage ayant des groupes de commande contrÔlés - Google Patents

Dispositif d'étirage ayant des groupes de commande contrÔlés Download PDF

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Publication number
EP0411379B2
EP0411379B2 EP19900113606 EP90113606A EP0411379B2 EP 0411379 B2 EP0411379 B2 EP 0411379B2 EP 19900113606 EP19900113606 EP 19900113606 EP 90113606 A EP90113606 A EP 90113606A EP 0411379 B2 EP0411379 B2 EP 0411379B2
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EP
European Patent Office
Prior art keywords
drive
controlling means
drafting
control
main
Prior art date
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Expired - Lifetime
Application number
EP19900113606
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German (de)
English (en)
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EP0411379B1 (fr
EP0411379A1 (fr
Inventor
Erich Jornot
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.)
Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
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Publication of EP0411379B1 publication Critical patent/EP0411379B1/fr
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Classifications

    • 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
    • D01H5/32—Regulating or varying draft
    • D01H5/38—Regulating or varying draft in response to irregularities in material ; Measuring irregularities

Definitions

  • the invention relates to a route according to the preamble of claim 1 and to a method for operating a route according to the preamble of claim 6.
  • DE-OS 29 12 576 relates to a method and a device for the regulation of strip weight fluctuations on cards, cards, draw frames and the like, with a first measuring device for the measurement of the absolute cross-section or the relative cross-sectional fluctuations compared to a predetermined fixed setpoint of at the outlet of the machine emerging sliver and to form a corresponding measurement signal.
  • the invention is based on DE-OS 29 12 576.
  • DE 2331217 A1 discloses a drafting system with two drives.
  • the drives are connected to one another by tapping an adjustable part of the output voltage of the tachometer machine of one motor at a potentiometer and using an amplifier as setpoint value v s for controlling the actuator 12 of the other motor.
  • This synchronous circuit does not influence the motors on both sides.
  • FIG. 1 shows a schematic representation of an embodiment of the route.
  • Several slivers 15.1-15.6, six in the example, are combined side by side to form a loose fleece and passed through several roller systems 1-6. Due to the fact that the peripheral speed of the rollers increases in two stages in the direction of transport of the fiber material, it is pre-drawn over the first stage (pre-drafting) and further drawn over the second to the desired cross-section (main drafting).
  • the fleece 18 emerging from the route is thinner than the fleece of the fed strips 15.1-15.6 and correspondingly longer. Because the warping processes can be regulated depending on the cross-section of the fed strips, the strips or the fleece are made more uniform as they pass through the line, i.e.
  • the cross-section of the emerging fleece is more uniform than the cross-section of the fed fleece or Tapes.
  • the present route has a pre-drafting area 11 and a main drafting area 12.
  • the invention can also be used in an analogous manner in connection with routes with only one or more than two delay areas.
  • the belts 15.1-15.6 are fed into the line by two systems 1 and 2 of conveyor rollers.
  • a first system 1 consists, for example, of two rollers 1.1 and 1.2, between which the fed belts 15.1-15.6, which are combined to form a loose fleece, are transported.
  • a roller system 2 follows, which here consists of an active conveyor roller 2.1 and two passive conveyor rollers 2.2, 2.3.
  • the fed tapes 15.1-15.6 are brought together to form a fleece 16.
  • the two roller systems 1 and 2 of the feed are followed in the transport direction of the fleece 16 by a third system 3 of pre-drawing rollers 3.1 and 3.2, between which the fleece is transported further.
  • the peripheral speed v 3 of the pre-drafting rollers is higher than that v 1.2 of the infeed rollers so that the fleece 16 is stretched in the pre-drafting area 11 between the infeed rollers 2.1, 2.3 and the pre-drafting rollers 3.1, 3.2, its cross section being reduced.
  • a pre-warped fleece 17 is created from the loose fleece 16 of the fed-in belts 17.
  • the pre-drafting rollers 3.1, 3.2 are followed by a further system 4 of an active conveying roller 4.1 and two passive conveying rollers 4.2, 4.3 for further transport of the fleece.
  • the peripheral speed v 4 of the conveyor rollers 4.1, 4.2, 4.3 for further transport is the same as v 3 of the pre-drawing rollers 3.1, 3.2.
  • a fifth system 5 of main drafting rollers 5.1 and 5.2 follows the roller system 4 for further transport in the transport direction of the fleece 17.
  • the main drafting rollers in turn have a higher surface speed v 5 than the preceding transport rollers, so that the pre-drawn fleece 17 between the transport rollers 4.1 4.3 and the main drafting rollers 5.1, 5.2 is further drawn in the main drafting area 12 to the finished drawn fleece 18, the fleece 18 via a funnel T is merged into a band.
  • the roller systems 1, 2 and 4 are driven by a first servo motor 7.1 via a gear, preferably via a toothed belt.
  • the pre-drafting rollers 3.1 3.2 are mechanically coupled to the roller system 4, it being possible for the translation to be adjustable or for a target value to be predetermined.
  • the gear (not visible in the figure) determines the ratio of the peripheral speeds (v in ) of the inlet rollers and the peripheral speed v 3 of the pre-drafting rollers 3.1, 3.2, hence the pre-drafting ratio.
  • the roller systems 5 and 6 are in turn driven by a servo motor 7.2.
  • the inlet rollers 1.1, 1.2 can also be driven by the first servo motor 7.1 or optionally by an independent motor 7.3.
  • the two servomotors 7.1 and 7.2 each have their own controller 8.1 or 8.2.
  • the control takes place via a closed control loop 8 a, 8 b or 8 c, 8 d.
  • the actual value of one servomotor can be transmitted to the other servomotor in one or both directions via a control connection 8 e, so that everyone can react accordingly to deviations from the other.
  • the total cross-section of the strips 15.1-15.6 fed in is measured at the inlet of the line by an inlet measuring element 9.1. At the exit of the line, the cross section of the emerging strip is then measured by an outlet measuring element 9.2.
  • a central computer unit 10 transmits an initial setting of the target size for the first drive via 10 a to the first controller 8.1.
  • the measured variables of the two measuring elements 9.1, 9.2 are continuously transmitted to the central computer unit via the connections 9a and 9b during the stretching process.
  • the setpoint for the servo motor 7.2 is determined in the central computer unit and any other elements using the method. This setpoint is continuously given to the second controller 8.2 via 10b.
  • the drive concept according to the invention with its regulation is explained in more detail with reference to FIG. 2.
  • the two servomotors 7.1 and 7.2 serve as the main drive.
  • the servo motor 7.1 drives the roller system 1 of the inlet and the system 4 of conveyor rollers, the latter following the advance section.
  • the pair of pre-drafting rollers 3.1, 3.2. is mechanically coupled to the roller system 4, so it is also driven by the servo motor 7.1.
  • the roller pair 1 at the inlet is either driven by the servo motor 7.1 via an intermediate drive 7.3 (gear) or can be driven by an independent servo motor 7.3 in another embodiment variant of the line drive.
  • the servo motor 7.2 drives the pair of main drafting rollers 5.1, 5.2 directly.
  • the outlet roller pair 6 is also driven by the servo motor 7.2 via a gear 7.4.
  • the can 13 is driven at the outlet of the drafting system either via an intermediate drive 7.5 (gearbox) driven by the servo motor 7.2 or, in another embodiment variant of the drafting system, by means of an independent drive motor 7.5.
  • the drive concept is based on the fact that at least one drive group within the route is driven independently by a motor.
  • One motor is provided for each independent drive group of a warping area or, if required, a conveyor or transport section or other process-linked workstations; in the example shown, there are two of them, namely the motors 7.1, 7.2 of the pre-drafting area 11 and of the main drafting area 12.
  • faults caused by the drives can be compensated for as part of the overall system control, ie the main control.
  • the drive of the drafting system is controlled on two levels, a superordinate main control 9 a, 9 b, 10 a, 10 b, in which the central computer unit 10 performs an essential function, and at least one subordinate auxiliary control 8.2 for the main delay area.
  • two controllers 8.1 and 8.2 are provided for the auxiliary control of both the main delay area (including the run-out area) and the advance area (including the lead-in area).
  • Any additional controllers 8.3, 8.5 can also be provided in the design variants already mentioned, which are shown here in dashed lines.
  • Position controllers are preferably used in connection with the two servomotors, which can be designed, for example, as brushless DC motors.
  • the meshed control with a main and at least one auxiliary control relieves the load on the central computer unit 10 and reduces the risk of large strokes occurring in the main control.
  • the main control 9 a, 9 b, 10 a, 10 b delivers setpoints, for example speed setpoints, via 10 a or 10 b to the main drive motors 7.1 or 7.2, which are based on the set cross section of the emerging strip and the measured actual cross sections of the fed band or the fed bands 15.1-15.6 and the emerging band are calculated. Depending on the configuration of the control, further parameters can be taken into account.
  • auxiliary controls 8 a-8 k By means of the auxiliary controls 8 a-8 k, the speeds of the individual drive motors 7.1 and 7.2 (for the design variants also 7.3 and 7.5) in closed position control loops 8 a, 8 b and 8 c, 8 d (in the design variants also 8 f, 8 g and 8 i, 8 j) regulated to the desired values required by the upper regulation level. Differences between actual and target values of the engine speeds are between controllers 8.1, 8.2 e.g. Position controllers transmitted via a control connection 8 e (possibly also 8 k and 8 h).
  • the drive motors which determine the distortion, form a position-controlled drive system with their respective control loops.
  • each motor can be provided with an encoder or a resolver, which gives the angular position of the drive shaft to the position control for this motor at any time with predetermined accuracy as an actual value.
  • the control of the line can use these position control loops to coordinate the angular positions of the motor shafts and thus the rollers of the drafting system driven by them.
  • Such a drive system enables much better warping accuracy than can be achieved with speed-controlled motors.
  • the use of position controllers as an auxiliary controller has the advantage that even when the motor is at a standstill, the controller is guaranteed when starting up.
  • the invention does not exclude the use of speed-controlled motors for the individual warp-determining rollers, since such motors also enable a substantial improvement over the prior art.
  • Position regulators are used as regulators within the framework of the auxiliary regulation, since they guarantee the regulation when the motor is at a standstill when the motor starts up.
  • the corresponding regulators 8.1, 8.2 can contain separate computer units (for example with digital signal processors or microprocessors) or can also be designed as a module of the central computer unit 10.
  • a drive group is understood to mean a unit that contains at least one motor, including the rollers or guide or transport rollers driven by it.
  • Such a drive group represents, for example, in the exemplary embodiment according to FIG. 2, the group 7.2, 7.4, 7.5, 5 and 6 containing the motor 7.2.
  • a preferred embodiment of the route provides a digital synchronization control of the drive groups for the nominal settings.
  • a drive group serves as the master drive. The control of a drive group can then be changed nominal setting.
  • the drive system according to the invention enables meshed control and thus uses the improved time dependency.
  • the control connections 8 e, 8 h, 8 k also enable shorter system response times. Divergences in the drive systems do not have to be detected via a closed main control loop with a corresponding dead time.
  • Such a separate regulation of each drive group also has significant advantages, in particular when several warpage regions are provided, of which, however, only or a part of or should be regulated. Those areas with constant delay can be operated by simply specifying the setpoint, without the need for regulation by the main regulation.
  • the control principle according to the invention ensures very good evenness even in the event of unforeseen changes in the operating conditions. Both short-term disruptions and slow changes can be optimally compensated within the scope of this regulation.
  • the manipulated variable determined by a main control here for example for the main delay, serves as an input variable for the corresponding controller 8.2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Paper (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (8)

  1. Banc d'étirage comportant une régulation principale qui est pourvue d'un circuit régulateur ouvert et d'un circuit régulateur fermé, pour le train d'étirage, avec une zone d'étirage principal et une zone de préétirage (11, 12) et avec un entraînement (7.1) pour la zone de préétirage (11) et un entraînement (7.2) pour la zone d'étirage principal (12), les entraînements (7.1, 7.2) comprenant chacun d'un circuit de régulation auxiliaire (8a, 8b; 8c, 8d) comportant chacun un régulateur (8.1, 8.2), la régulation principale comportant une unité calculatrice (10) et les entraînements (7.1, 7.2) étant reliés chacun avec l'unité calculatrice (10), caractérisé en ce que les deux régulateurs (8.1, 8.2) sont reliés entre eux par une liaison de contrôle (8e) qui transmet la valeur INSTANTANÉE dans les deux sens de l'un des entraînements (7.1, 7.2) à l'autre entraînement (7.1, 7.2), par l'intermédiaire de la liaison de contrôle (8e), afin que chacun des entraînements puisse réagir en conséquence à des écarts respectifs de l'autre entraînement.
  2. Banc d'étirage selon la revendication 1, caractérisé en ce que le banc d'étirage comprend au moins un groupe d'entraînement (7.3, 1) indépendant soit pour une section d'amenée soit pour une section de transport ou encore pour une station de travail reliée avec le banc d'étirage en ce qui concerne le processus et que ce groupe d'entraînement (7.3, 1) comprend un circuit de régulation auxiliaire fermé (8f, 8g) avec un régulateur (8.3).
  3. Banc d'étirage selon la revendication 2, caractérisé en ce que le régulateur (8.3) du groupe d'entraînement indépendant pour cette section d'amenée ou de transport est relié avec au moins un régulateur (8,1, 8.2) d'une zone d'étirage (11, 12), par l'intermédiaire d'une liaison de contrôle (8h).
  4. Banc d'étirage selon l'une des revendications 1 à 2, caractérisé en ce que les régulateurs (8.1, 8.2) sont conçu comme systèmes de positionnement.
  5. Banc d'étirage selon l'une des revendications 1 à 4, caractérisé en ce que le train d'étirage respectivement le banc d'étirage est intégré dans une peigneuse dans le but d'étirer des rubans de fibres constitués par les têtes peigneuses.
  6. Procédé pour l'exploitation d'un banc d'étirage comprenant une zone d'étirage principal et une zone de préétirage ainsi qu'un entraînement (7.1) pour la zone de préétirage (11) et un entraînement (7.2) pour la zone d'étirage principal (12), les entraînements (7.1, 7.2) étant pourvus chacun d'un circuit de régulation auxiliaire (8a, 8b, 8c, 8d), les valeurs nominales pour un paramètre prédéterminé (vitesse respectivement position angulaire) des groupes d'entraînement étant transmises au(x) régulateur(s) (8.1, 8.2, 8.3, 8.5) d'un circuit de régulation auxiliaire d'un groupe d'entraînement par un organe émetteur correspondant et ce(s) régulateur(s) (8.1, 8.2, 8.3, 8.5) maintenant les groupes d'entraînement à la vitesse nominale, à l'intérieur de la zone de régulation, pendant la marche du banc d'étirage, tant que les valeurs nominales ne sont pas modifées, dans le but de rendre le ruban de fibres plus régulier, selon la revendication 1, caractérisé en ce qu'une adaptation de la valeur nominale d'au moins un groupe d'entraînement est effectuée par l'intermédiaire de la liaison de contrôle (8e. 8h, 8k) lorsque le champ de régulation d'un régulateur (8.1, 8.2, 8.3, 8.5) est dépassé.
  7. Procédé pour l'exploitation d'un banc d'étirage selon la revendication 6, caractérisé en ce qu'une régulation de synchronisme numérique est prévue pour le réglage nominal des groupes d'entraînement qui peut être variée pour la régulation d'au moins un groupe d'entraînement.
  8. Procédé selon l'une des revendications 5 ou 6, caractérisé en ce que le procédé est mis en oeuvre en combinaison pour l'exploitation d'un train d'étirage intégré dans une peigneuse pour étirer des rubans de fibres constitués par les têtes peigneuses.
EP19900113606 1989-07-31 1990-07-16 Dispositif d'étirage ayant des groupes de commande contrÔlés Expired - Lifetime EP0411379B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH283489A CH681897A5 (fr) 1989-07-31 1989-07-31
CH2834/89 1989-07-31

Publications (3)

Publication Number Publication Date
EP0411379A1 EP0411379A1 (fr) 1991-02-06
EP0411379B1 EP0411379B1 (fr) 1994-06-01
EP0411379B2 true EP0411379B2 (fr) 1997-05-14

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ID=4242644

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Application Number Title Priority Date Filing Date
EP19900113606 Expired - Lifetime EP0411379B2 (fr) 1989-07-31 1990-07-16 Dispositif d'étirage ayant des groupes de commande contrÔlés

Country Status (5)

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EP (1) EP0411379B2 (fr)
JP (1) JPH0364530A (fr)
CH (1) CH681897A5 (fr)
DD (1) DD296713A5 (fr)
PT (1) PT94617A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5509179A (en) * 1990-06-25 1996-04-23 Mondini; Giancarlo Autoleveller draw frame having process feed back control system
EP0502137A1 (fr) * 1990-09-20 1992-09-09 Maschinenfabrik Rieter Ag Banc d'etirage avec cylindre de sortie regule
CH685164A5 (de) * 1992-03-05 1995-04-13 Zellweger Uster Ag Verfahren und Vorrichtung zur Regelung des Verzugs eines Streckwerks.
DE4307839A1 (de) * 1993-03-12 1994-09-15 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zur automatischen Einstellung der Drehzahlverhältnisse an einer Strecke
DE69430267D1 (de) * 1993-11-23 2002-05-02 Commw Scient Ind Res Org Fadenspinnen
DE10004604B4 (de) * 2000-02-03 2018-04-05 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung zum Zuführen von Faserbändern an einer Spinnereimaschine, insbesondere Strecke, z.B. Regulierstrecke

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2734564A1 (de) * 1977-07-30 1979-02-08 Schubert & Salzer Maschinen Verfahren und vorrichtung zum herstellen eines garnes aus kaemmlingen
DE2941612A1 (de) * 1979-10-13 1981-04-23 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Strecke
DE3205880A1 (de) * 1982-02-18 1983-08-25 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Streckwerk fuer eine spinnereimaschine
IT1227771B (it) * 1986-07-04 1991-05-06 Zinser Textilmaschinen Gmbh Procedimento e dispositivo per regolare lo stiro di un nastro di fibre in una macchina tessile.
EP0376002B1 (fr) * 1988-12-22 1994-04-06 Maschinenfabrik Rieter Ag Machine de peignage

Also Published As

Publication number Publication date
JPH0364530A (ja) 1991-03-19
PT94617A (pt) 1992-01-31
DD296713A5 (de) 1991-12-12
CH681897A5 (fr) 1993-06-15
EP0411379B1 (fr) 1994-06-01
EP0411379A1 (fr) 1991-02-06

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