EP0411379A1 - 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
EP0411379A1
EP0411379A1 EP90113606A EP90113606A EP0411379A1 EP 0411379 A1 EP0411379 A1 EP 0411379A1 EP 90113606 A EP90113606 A EP 90113606A EP 90113606 A EP90113606 A EP 90113606A EP 0411379 A1 EP0411379 A1 EP 0411379A1
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EP
European Patent Office
Prior art keywords
drive
drafting
control
controller
drive group
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.)
Granted
Application number
EP90113606A
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German (de)
English (en)
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EP0411379B1 (fr
EP0411379B2 (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
Publication of EP0411379A1 publication Critical patent/EP0411379A1/fr
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 lies in the field of the textile industry and relates to a line with a main and at least one auxiliary control and to a method for operating a drafting system according to the preambles of claims 1 and 6, respectively
  • Figure 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. Because the circumferential 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 as a function of 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 infeed belts 15.1-15.6, which are combined to form a looser fleece, are transported.
  • a roller system 2 follows in the direction of transport of the strips, which is shown here 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 nonwoven 16 by a third system 3 of pre-drawing rollers 3.1 and 3.2, between which the nonwoven is transported on.
  • the peripheral speed v3 of the pre-drafting rollers is higher than that of the intake rollers v1, v2, so that the fleece 16 is stretched in the pre-drafting area 11 between the intake rollers 2 and the pre-drafting rollers 3, its cross section being reduced.
  • the pre-drawn rolls 3 are followed by a further system 4 of an active conveying roll 4.1 and two passive conveying rolls 4.2, 4.3 for further transport of the non-woven.
  • the peripheral speed v4 of the conveyor rollers 4 for further transport is the same as v3 of the pre-drawing rollers 3rd
  • the roller system for further transport 4 is followed by a fifth system 5 of main drafting rollers 5.1 and 5.2 in the transport direction of the fleece 17.
  • the main drafting rollers in turn have a higher surface speed v5 than the preceding transport rollers, so that the pre-drawn fleece 17 between the transport rollers 4 and the main drafting rollers 5 in the main drafting area 12 continues to be finished Fleece 18 is warped, the fleece 18 is brought together via a funnel T to form 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-drawing rollers 3 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 on the figure) determines the ratio of the peripheral speeds of the inlet rollers (v in ) and the peripheral speed v3 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 regulation takes place via a closed control loop 8.a, 8.b or 8.c, 8.d.
  • the actual value of one servo motor can be transmitted to the other servo motor 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.
  • the cross section of the emerging strip 16 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 9.a and 9.b during the stretching process.
  • the setpoint for the servo motor 8.2 is determined in the central computer unit and any other elements using the method according to the invention. This setpoint is continuously given to the second controller 8.2 via 10.b.
  • 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-drawing rollers 3 is mechanically coupled to the roller system 4 and is therefore also driven by the servo motor 7.1.
  • the pair of rollers 1 at the inlet is ent neither driven by the servo motor 7.1 via an intermediate drive 7.3 (gearbox) or can be driven by an independent servo motor 7.3 in another embodiment variant of the track drive.
  • the servo motor 7.2 drives the pair of main drafting rollers 5 directly.
  • the funnel wheel 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 warpage or, if required, a conveyor or transport section or other process-linked work stations; in the example shown, there are two of them, namely the motors 7.1, 7.2 of the pre-drafting area 11 and 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.
  • auxiliary units controlled by means of controllers 8.1, 8.2 can be used in various main control concepts.
  • 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 takes over 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 made up of the set cross-section of the emerging belt and out the measured actual cross sections of the fed-in belt or the fed-in belts 9.a and the emerging belt 9.b are calculated. Depending on the configuration of the control, further parameters can be taken into account.
  • the speeds of the individual drive motors 7.1 and 7.2 are set in closed position control loops 8.a, 8.b and 8.c, 8.d (in the design variants) by means of auxiliary controls 8.a-8.k. also 8.f, 8.g and 8.i, 8.j) to those of the required setpoints. Differences between the actual and target values of the motor speeds are transmitted between the position controllers 8.1, 8.2 via a control connection 8.e (possibly also 8.k and 8.h).
  • a deviation outside the control range of the relevant controller 8.1 or 8.2 (possibly also 8.3 or 8.5) between the setpoint and actual value of the speed of the motor in question and the position controllers of the other motors can be compensated for by appropriate corrections in the Setpoints for the speeds of the other motors.
  • corresponding returns to the central computer unit 10 can be provided. In a preferred embodiment, this correction takes place internally in the corresponding controllers.
  • 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 route can be mutually coordinated via these position control loops, 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 the controller is guaranteed even when the motor is at a standstill.
  • auxiliary controller not a speed controller
  • the invention does not exclude the use of speed-controlled motors for the individual warp-determining rollers, since such motors also enable a significant improvement over the prior art.
  • Position regulators are used as regulators in the context of the auxiliary regulation, since they also guarantee regulation when the motor is at a standstill.
  • the corresponding controllers 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 achieved by changing the 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 of the drive systems do not have to be detected via a closed main control circuit 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 warping 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Paper (AREA)
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 true EP0411379A1 (fr) 1991-02-06
EP0411379B1 EP0411379B1 (fr) 1994-06-01
EP0411379B2 EP0411379B2 (fr) 1997-05-14

Family

ID=4242644

Family Applications (1)

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)

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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993018213A1 (fr) * 1992-03-05 1993-09-16 Zellweger Uster Ag Procede et dispositif de regulation de l'etirage dans un banc d'etirage
DE4307839A1 (de) * 1993-03-12 1994-09-15 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zur automatischen Einstellung der Drehzahlverhältnisse an einer Strecke
US5377385A (en) * 1990-09-20 1995-01-03 Maschinenfabrik Reiter Ag Draw frame, storage device and coiler, delivery regulation
WO1995014800A1 (fr) * 1993-11-23 1995-06-01 Commonwealth Scientific And Industrial Research Organisation Filage
US5509179A (en) * 1990-06-25 1996-04-23 Mondini; Giancarlo Autoleveller draw frame having process feed back control system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (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
GB2062712A (en) * 1979-10-13 1981-05-28 Zinser Textilmaschinen Gmbh Drawframes
FR2521597A1 (fr) * 1982-02-18 1983-08-19 Zinser Textilmaschinen Gmbh Banc d'etirage pour metier a filer
DE3622584A1 (de) * 1986-07-04 1988-01-07 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zur regulierung des verzugs eines faserbands bei einer textilmaschine
EP0376002A1 (fr) * 1988-12-22 1990-07-04 Maschinenfabrik Rieter Ag Machine de peignage

Patent Citations (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
GB2062712A (en) * 1979-10-13 1981-05-28 Zinser Textilmaschinen Gmbh Drawframes
FR2521597A1 (fr) * 1982-02-18 1983-08-19 Zinser Textilmaschinen Gmbh Banc d'etirage pour metier a filer
DE3622584A1 (de) * 1986-07-04 1988-01-07 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zur regulierung des verzugs eines faserbands bei einer textilmaschine
EP0376002A1 (fr) * 1988-12-22 1990-07-04 Maschinenfabrik Rieter Ag Machine de peignage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 45 (C-268)(1768) 26 Februar 1985, & JP-A-59 187629 (HOWA KOGYO K.K.) *

Cited By (8)

* 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
US5377385A (en) * 1990-09-20 1995-01-03 Maschinenfabrik Reiter Ag Draw frame, storage device and coiler, delivery regulation
WO1993018213A1 (fr) * 1992-03-05 1993-09-16 Zellweger Uster Ag Procede et dispositif de regulation de l'etirage dans un banc d'etirage
US5428870A (en) * 1992-03-05 1995-07-04 Zellweger Luwa Ag Method and device for regulating the draw of a drawing unit
DE4307839A1 (de) * 1993-03-12 1994-09-15 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zur automatischen Einstellung der Drehzahlverhältnisse an einer Strecke
US5452626A (en) * 1993-03-12 1995-09-26 Rieter Ingolstadt Spinnereimaschinenbau Ag Process and device for the automatic adjustment of rotational speed ratios between operating elements of a draw frame
WO1995014800A1 (fr) * 1993-11-23 1995-06-01 Commonwealth Scientific And Industrial Research Organisation Filage
US6012277A (en) * 1993-11-23 2000-01-11 Commonwealth Scientific & Industrial Research Organisation Yarn spinning from fibre sub-assemblies with variation of their paths of travel, relative positions or twist levels

Also Published As

Publication number Publication date
EP0411379B1 (fr) 1994-06-01
DD296713A5 (de) 1991-12-12
JPH0364530A (ja) 1991-03-19
PT94617A (pt) 1992-01-31
CH681897A5 (fr) 1993-06-15
EP0411379B2 (fr) 1997-05-14

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