EP0038927B1 - Procédé et dispositif pour la régulation des fluctuations du titre d'un ruban de fibres - Google Patents

Procédé et dispositif pour la régulation des fluctuations du titre d'un ruban de fibres Download PDF

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Publication number
EP0038927B1
EP0038927B1 EP81101903A EP81101903A EP0038927B1 EP 0038927 B1 EP0038927 B1 EP 0038927B1 EP 81101903 A EP81101903 A EP 81101903A EP 81101903 A EP81101903 A EP 81101903A EP 0038927 B1 EP0038927 B1 EP 0038927B1
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Prior art keywords
controller
speed
voltage
titer
computer
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Expired
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EP81101903A
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German (de)
English (en)
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EP0038927A1 (fr
EP0038927B2 (fr
Inventor
Hanspeter Meile
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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
Priority to AT81101903T priority Critical patent/ATE6947T1/de
Publication of EP0038927A1 publication Critical patent/EP0038927A1/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
    • D01H5/42—Regulating or varying draft in response to irregularities in material ; Measuring irregularities employing electrical time-delay devices

Definitions

  • the invention relates to a method and a device for regulating the titre fluctuations of a sliver, which is obtained by drawing in a drafting system from several individual slivers.
  • Regulating sections are already known in which a measuring device measures titer deviations of the strip at the end of the section, compares them with a setpoint value, and supplies the actuator with correction commands for detected deviations. This then changes the drawing-in speed of the drafting system and thus the main draft until the band number (titer) corresponds to the target value. Since the belt runs through the measuring element after the regulation has been delayed, the correction effect is automatically checked continuously. Such closed control loops guarantee excellent band uniformity (USTER NEWS, Bulletin No. 24, October 1976, page 1).
  • the object of the invention is to overcome the disadvantages mentioned with the aim of creating a method and a device for regulating titre fluctuations in a sliver, in which no titer deviations and excessive stresses arise in the sliver both when starting up and when turning off, and also the mechanical Parts of the machine and the cans are used only minimally.
  • Default capability staple fiber ribbons 1 which by means of roller pairs 2 and 3 of a feed table (not shown) a drafting autoleveller 4 of a (not shown) are fed to pass under a tension draft of about 1.05fach einl with the velocity V. to the input roller pair 5, from there to a roller pair 6 running at a higher circumferential speed in relation to a selected preliminary draft, whereupon the main drafting takes place by means of the delivery roller pair 7 at the speed Vi.
  • the fleece 8 formed in the drafting system is laterally combined into a compact belt 10 by means of a funnel 9 and fed to a pair of measuring rollers 11, 12.
  • This pair of measuring rollers can consist of the driven roller 11 having a groove 13 and the complementary non-driven counter roller 12 which engages in the groove 13.
  • the distance D between the pairs of rollers 7 and 11, 12 is approximately 10 mm in the lines which are common today. From there, the belt 10 arrives by means of a turntable 14 for storage in the can 15 placed underneath. This can be driven in rotation or stationary.
  • a main motor 16 designed as a stop motor, is used to drive all of the rollers and drives the roller pairs 7 and 11, 12 via the drive connections 17, 18 and 19 at a constant, reduced speed in a rigid ratio. This speed is such that the fleece 8 or the belt 10 is conveyed at a speed of 600 m / min to about 800 m / min.
  • a pulse signal generator 20, which acts as a proximity initiator and interacts in a contactless manner with an element (not shown) of the drive connection 17, supplies a signal for the speed of the roller pair 7 or 11, 12 proportional signal to a frequency / voltage converter 21, which delivers a corresponding voltage signal Un 17 .
  • the drive connection 17 also transmits the rotary movement n 17 via a differential gear 22 and via drive connection 23 with speed n s to the driven rollers of the pairs 2, 3, 5 and 6 rotating in constant relation to one another.
  • the differential gear 22 also has one with the variable one Speed n 1 driven drive connection 24 from a voltage-controlled DC motor 25, which also drives a control tachometer generator 27 via drive connection 26. Its outputs are electrically connected on the one hand to a motor controller 29 via a speed monitor 28, and on the other hand to an adder 30.
  • the controller 36 is also connected to the engine control 29 via line 39.
  • a line 40 leads to a multiplier 41, which on the other hand receives the signal Un 17 from the frequency voltage converter 21 via line 42.
  • the controller 36 and the multiplier 41 together form an analog computer.
  • the addition element 30 connected via line 43 to the multiplier 41 supplying the manipulated variable outputs its difference signal via a switch 44 to a power preamplifier 45 and then to the DC motor 25.
  • the outputs of the motor control 29 each have a connecting line 46, 47 to the switch 44 and to the main motor 16. If the prescribed maximum speed of the DC motor 25 is exceeded, the speed monitor 28 causes the motor 25 to be switched off by the motor control 29.
  • the parts 25, 27, 30 , 40 and 45 form the actuator 48, a closed control loop.
  • the structure of the controller 36 can be seen in FIG. 2. It consists of an inert P-I controller 49, which can be switched on for the stop-start phase, and of a fast-moving P-I controller 50, which can be switched over for the normal operating phase.
  • the switchover from the start to the normal phase and from this to the stop phase takes place via line 39, from the motor control 29 by means of a changeover switch 55.
  • the operational amplifiers 56 present in the controller 36 are commercially available, e.g. B. Type 6P 3521 from Burr Brown, International Airport Park, P.O. Box 11 400, Tuscon, Arizona, USA.
  • the device now works as follows:
  • the voltage ⁇ U supplied by line 35 initially reaches the slow regulator 49, then the regulator voltage supplied by it via the changeover switch 55, which is brought into the position shown in FIG. 2 by the motor control 29 becomes the control area monitor 37.
  • the switch 55 is flipped, and the fast controller 50 takes over the signal dU from line 35, whereby the normal working phase is initiated.
  • the route is switched off, the same happens in reverse order.
  • controller 49 Construction and operation with an additional sluggish controller 49 are required to avoid that the controller overshoots in the start and stop phase due to lack of inertia (this is undesirable in normal operation) and the drafting device 4 therefore produces misalignments and band breaks.
  • Both the controller 49 and the controller 50 must be the changing operating conditions can be adjusted by appropriate setting.
  • an adjustment of the setting by means of the potentiometer 56a connected upstream of the operational amplifier 56 and the potentiometer 56b of the RC element to the acceleration and deceleration of the machine is required. This adjustment depends on the final speed to be reached.
  • An adjustment to the material to be processed is necessary due to the distortion forces depending on the material.
  • the inertia of the cans and their contents must also be taken into account.
  • the current operating status ie whether the machine has already warmed up or is starting from a cold start, also plays a role in the setting. When switching off, the influence of different wear of the brake pads in motor 16 (stop motor) must also be
  • the controller 50 requires adjustment when the delivery speed changes, e.g. B. when switching from operating at 400 m / min to 500 m / min, by changing the corresponding potentiometers 56c and 56d. This adjustment work is time-consuming if no skilful operator is on hand. It should also not be forgotten that new settings should be made when the operating conditions change, which requires reliable personnel.
  • the device works as follows: in the multiplier 41, by multiplying the two voltage signals supplied by lines 40 and 42, the manipulated variable y required for regulating the titre fluctuations of the fiber sliver 10 is continuously determined, which is fed to the actuator 48, which in turn is supplied via the differential gear 22 has a corrective effect on the speed of the drafting rollers 2, 3, 5 and 6, so that fluctuations in the titre in the strip to be drawn are continuously adjusted until the desired value is reached.
  • the main drive motor 16 accelerates from standstill to its constant operating speed n, to which n 17 is in a fixed ratio given by change gears (not shown).
  • the motor control 29 is provided with a time switch device (not shown), as a result of which the control circuit is switched on when the main motor 16 is switched on and is only switched off again when the main motor 16 is at a standstill.
  • the structure and operation of the device according to FIG. 1 can be further perfected to eliminate the skillful adjustment work by the frequency generated by the pulse signal generator 57 (FIG. 3), the delivery speed V i , ie the speed n 17, the frequency / voltage converter 58 is supplied, which supplies a voltage U 59 via line 59 to a PI controller 60.
  • the signal from line 59 (FIG. 4) is applied to multipliers 61 and 62, while that from line 35 is applied to multiplier 61 and a multiplier 63.
  • Multiplier 61 supplies a signal V 1 x dU (titer) of an amplifier stage for P component 64, and multiplier 63 receives a signal V 1 2 from multiplier 62 and a signal ⁇ U from line 35 and outputs their product V 1 2 . ⁇ U to the amplifier stage for the I component 65. Both amplifier stages 64 and 65 each have an operational amplifier 66, type 2521 L from Burr Brown.
  • the multipliers 61-63 are types 4203 of the same origin.
  • the signal emitted on line 40 thus corresponds to the sum which the multiplier 41 receives as a titer and delivery speed-dependent quantity.
  • the controller 60 and the multiplier 41 in turn form the analog computer.
  • the required speed change of the DC motor 25 is automatically proportional to the titer deviation and proportional to the outlet speed of the strip 10 when starting up and coasting down, that is to say the inlet speed of the strips 1 changes proportionally to the outlet speed of the strip 10, and thus the main delay is as desired , regardless of the speed n 17 .
  • the control parameters automatically change from sluggish to quick when desired, and vice versa when they are switched off. This means that the controller is optimally set for every delivery speed without manual intervention. Since starting and stopping can be mastered independently of the speed of the drafting rollers, the starting and stopping processes can be carried out slowly (ie per 5-10 seconds, corresponding to a tape exit speed of up to 800 m / min). This leads to a very significant reduction in mechanical stress due to the absence of abrupt braking and starting up the machine and to a reduction in the risk of belt breakage.
  • FIGS. 3 and 4 can advantageously be replaced by the digital circuit shown in FIG. 5 described below.
  • the elements 20, 31, 34 and 57 and the line 32 correspond to those of FIG. 3. They therefore have the same reference numerals in FIG. 5.
  • a peripheral board 67 consists of an analog-digital converter (not shown) (e.g. Burr Brown Type ADC 85-12) for the input of the analog actual value signal (line 32) from the signal converter 31, a circuit (not shown) for Reading in digital data (e.g.
  • SN 74 LS 241 from Texas Instruments Inc., MOS Microcomputer Products, Box 1443 MS 6404, Houston, Texas 77 001, USA
  • a frequency-time Converter (not shown), consisting of commercially available oscillators and counters for the signals from lines 69 and 70 and corresponding auxiliary circuits (not shown) for decoding the addresses and generating the necessary control, control and auxiliary signals
  • a digital-to-analog converter (not shown) (e.g. Burr Brown DAC 71-COB-V) for the output (line 43) (manipulated variable y).
  • a microprocessor 71 (for example Texas Instruments, type TM 990/100 M) which interacts with the circuit board 67 is connected to data bus lines 72, address bus lines 73 and control bus lines 74.
  • the microprocessor 71 contains, by means of a plug-in EPROM memory 75 (eg type TMS 2716 from Texas Instruments Inc.), the necessary computing program, which is determined by the control algorithm is defined.
  • C1 and C2 mean constants, V einl . the infeed speed of the sliver in the pair of rollers 5, T the integration time.
  • the circuit board 67 now processes the input signals as they are called up by the microprocessor 71 and exchanged via the data bus line 72, the address bus line 73 and the control bus line 74 and transmits the calculation result in the form of the manipulated variable y to line 43, which it passes on to the actuator 48.

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

Claims (16)

1. Procédé pour régulariser les fluctuations du titre d'un ruban de fibres, provenant de l'étirage de plusieurs rubans de fibres, étirés dans un train d'étirage d'un banc d'étirage régulateur en un seul ruban particulier, dont le titre est mesuré à la sortie du train d'étirage, est comparé avec une valeur de consigne, et dans lequel un signal proportionnel aux écarts du titre est dirigé vers un régulateur qui amène, à l'aide d'une grandeur de réglage, les ordres de correction au membre de réglage qui change la vitesse d'entrée de rubans, jusqu'à ce qu'elle arrive à la valeur de consigne par une commande différentielle commandée par le moteur principal, et par un moteur de réglage, caractérisé par le fait que la grandeur de réglage amenée au membre de réglage (48) est formée par le produit d'une tension proportionnelle au nombre de tours du moteur principal, et d'une tension déterminée par l'écart du titre.
2. Procédé selon revendication 1, caractérisé par le fait que la tension déterminée par l'écart du titre est produite par un régulateur P-I.
3. Procédé selon revendication 1, caractérisé par le fait que la tension déterminée par l'écart du titre est produite, lors de l'accélération et de la décélération du banc d'étirage, par un régulateur P-I qui est conçu d'une manière suffisamment inerte pour éviter la suroscillation.
4. Procédé selon revendication 3, caractérisé par le fait que la tension déterminée est produite pendant la phase normale de marche par un régulateur P-I preste, qui maintient à un niveau minimum les écarts de la valeur de consigne.
5. Procédé selon revendication 1, caractérisé par le fait que la tension déterminée est influencée par un signal qui est une fonction de la vitesse de sortie Vi du banc d'étirage.
6. Dispositif pour l'exécution du procédé selon revendication 1, caractérisé par le fait qu'un calculateur (34, 41; 60,41; 67,71 ) est prévu pour la formation de la grandeur de réglage, du produit de la tension livrée par un donneur, (20) proportionnelle au nombre de tours du moteur principal, et de la tension déterminée par l'écart du titre, et que le calculateur (36, 41; 60, 41; 67, 71) est relié électriquement avec le membre de réglage (48) pour la transmission de la grandeur de réglage, et que le membre de réglage est relié mécaniquement avec la commande des cylindres d'entrée (23) par la commande différentielle (22).
7. Dispositif selon revendication 6, caractérisé par le fait que le calculateur (36, 41; 60, 41) est constitué d'un régulateur (36, 60) recevant l'écart de titre, représentant la tension, et d'un multiplicateur (41) alimenté par le régulateur, multiplicateur qui est relié, d'une part, avec le membre de réglage (48) et, d'autre part, avec le donneur (20).
8. Dispositif selon revendication 7, caractérisé par le fait que le régulateur (36) est constitué d'un régulateur P-I inerte (49) qui peut être enclenché dans la phase d'accélération et de décélération, et d'un régulateur P-I (50) preste qui peut être enclenché dans la phase de marche normale.
9. Dispositif selon revendication 8, caractérisé par le fait que le régulateur P-I (49) inerte possède les chiffres de répérage
Figure imgb0015
pour une distance entre la paire de cylindres (7) de sortie du train d'étirage et la paire de cylindres de mesure (11, 12) de environ 100 mm.
10. Dispositif selon revendication 9, caractérisé par le fait que le régulateur P-I preste possède les signes de répérage
Figure imgb0016
pour une distance d'environ 100 mm entre la paire de cylindres (7) de sortie du train d'étirage et la paire de cylindres de mesure (11, 12).
11. Dispositif selon revendication 8, caractérisé par le fait que le régulateur (36) est relié avec une commande de moteur (29) pour la commutation de la phase accélération-décélération dans la phase de marche normale. -
12. Dispositif selon revendication 11, caractérisé par le fait que la commande de moteur (29) commande le membre de réglage (48) ainsi que le moteur principal (16), ainsi qu'elle est reliée avec un surveilleur de zone de réglage (37) et un surveilleur du nombre de tours (28).
13. Dispositif selon revendication 8, caractérisé par le fait que le régulateur (60) est relié supplémentairement avec le donneur de signal (57), qui livre un signal proportionnel à la vitesse de sortie du banc d'étirage Vi (figure 3).
14. Dispositif selon revendication 8, caractérisé par le fait que le régulateur (60) ajuste automatiquement les grandeurs de répérage
Figure imgb0017
en fonction de la tension alimentée proportionnelle à la vitesse de livraison avec une distance d'environ 100 mm entre la dernière paire de cylindres (7) du train d'étirage et les cylindres de mesure (11,12).
15. Dispositif selon revendication 6, caractérisé par le fait que le calculateur (67, 71) est constitué par un microprocesseur (71), qui est relié avec le donneur (20), avec les moyens (31, 34) livrant le signal déterminé par l'écart du titre, ainsi qu'avec le membre de réglage (48).
16. Dispositif selon revendication 15, caractérisé par le fait que le microprocesseur (71) travaille avec l'algorithme de réglage suivant:
Figure imgb0018
formule dans laquelle ci et C2 représentent des constantes, Ventrée la vitesse d'entrée du ruban de fibres dans le train d'étirage et T le temps d'intégration.
EP81101903A 1980-03-28 1981-03-14 Procédé et dispositif pour la régulation des fluctuations du titre d'un ruban de fibres Expired EP0038927B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101903T ATE6947T1 (de) 1980-03-28 1981-03-14 Verfahren und vorrichtung zum ausregulieren von titerschwankungen eines faserbandes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2459/80 1980-03-28
CH245980 1980-03-28

Publications (3)

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EP0038927A1 EP0038927A1 (fr) 1981-11-04
EP0038927B1 true EP0038927B1 (fr) 1984-04-04
EP0038927B2 EP0038927B2 (fr) 1989-05-17

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EP81101903A Expired EP0038927B2 (fr) 1980-03-28 1981-03-14 Procédé et dispositif pour la régulation des fluctuations du titre d'un ruban de fibres

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US (1) US4369550A (fr)
EP (1) EP0038927B2 (fr)
JP (1) JPS56148920A (fr)
AT (1) ATE6947T1 (fr)
BR (1) BR8101861A (fr)
DE (1) DE3162923D1 (fr)
ES (1) ES501316A0 (fr)
HK (1) HK60785A (fr)
IN (1) IN154205B (fr)

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DE3205880A1 (de) * 1982-02-18 1983-08-25 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Streckwerk fuer eine spinnereimaschine
DE3472805D1 (en) * 1983-09-05 1988-08-25 Chubu Seiko Kk Device for automatically controlling the draft in a spinning machine
CH668781A5 (de) * 1984-09-25 1989-01-31 Zellweger Uster Ag Verfahren und vorrichtung zur optimierung des streckprozesses bei regulierstrecken der textilindustrie.
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.
DE3635341A1 (de) * 1986-10-17 1988-04-28 Zinser Textilmaschinen Gmbh Vorrichtung zur regulierung des verzugs eines faserbands bei einer textilmaschine
US5067202A (en) * 1989-07-26 1991-11-26 Maschinenfabrik Rieter Ag Method of maintaining a predetermined quantity of sliver in a card and/or drawframe
US5248925A (en) * 1989-07-31 1993-09-28 Rieter Machine Works, Ltd. Drafting arrangement with feedback drive groups
US5509179A (en) * 1990-06-25 1996-04-23 Mondini; Giancarlo Autoleveller draw frame having process feed back control system
CH683535A5 (de) * 1990-07-13 1994-03-31 Rieter Ag Maschf Streckwerkantrieb.
DE4215682B4 (de) * 1991-06-04 2004-07-22 Rieter Ingolstadt Spinnereimaschinenbau Ag Verfahren und Vorrichtung zur Korrektur des Reguliereinsatzpunktes und der Regulierintensität
JPH06505540A (ja) * 1991-12-09 1994-06-23 マシーネンフアブリーク　リーテル　アクチエンゲゼルシヤフト コーミングマシン
CH685164A5 (de) * 1992-03-05 1995-04-13 Zellweger Uster Ag Verfahren und Vorrichtung zur Regelung des Verzugs eines Streckwerks.
DE4219777A1 (de) * 1992-06-17 1993-12-23 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zur Signalanalyse einer Regulierstrecke
DE4301953C2 (de) * 1993-01-25 1994-12-15 Rieter Ingolstadt Spinnerei Verfahren zum Einstellen und Verbinden von Streckwerken und Strecke
DE4307839A1 (de) * 1993-03-12 1994-09-15 Rieter Ingolstadt Spinnerei Verfahren und Vorrichtung zur automatischen Einstellung der Drehzahlverhältnisse an einer Strecke
DE19529753B4 (de) * 1995-08-12 2005-11-17 Rieter Ingolstadt Spinnereimaschinenbau Ag Verfahren zur Gewährleistung eines exakten Regeleinsatzes für den Verzug eines Faserverbandes einer Vorspinnereimaschine und Vorrichtung zur Durchführung
US6581248B1 (en) * 1997-01-23 2003-06-24 Maschinenfabrik Rieter Ag Carding machine with drawing rollers at the outlet
TR200000962T2 (tr) † 1997-09-01 2001-07-23 Maschinenfabrik Rieter Ag Ayarlı çekme tertibatı.
DE59903261D1 (de) * 1998-06-12 2002-12-05 Rieter Ag Maschf Regulierstreckwerk
DE19954258A1 (de) * 1999-11-11 2001-05-17 Truetzschler Gmbh & Co Kg Vorrichtung zur elektronischen Steuerung von Spinnereimaschinen, insbesondere Spinnereivorbereitungsmaschinen
KR100653840B1 (ko) 2006-04-28 2006-12-05 장중원 섬유 드리프팅 장치

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US3822590A (en) * 1972-05-01 1974-07-09 Maremont Corp Textile sliver unevenness detecting
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Also Published As

Publication number Publication date
JPS56148920A (en) 1981-11-18
US4369550A (en) 1983-01-25
HK60785A (en) 1985-08-23
EP0038927A1 (fr) 1981-11-04
EP0038927B2 (fr) 1989-05-17
ES8301507A1 (es) 1982-12-01
BR8101861A (pt) 1981-09-29
IN154205B (fr) 1984-10-06
ATE6947T1 (de) 1984-04-15
JPH0217649B2 (fr) 1990-04-23
DE3162923D1 (en) 1984-05-10
ES501316A0 (es) 1982-12-01

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