EP0751244B1 - Verfahren zur Regelung der Fadenzugkraft - Google Patents

Verfahren zur Regelung der Fadenzugkraft Download PDF

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Publication number
EP0751244B1
EP0751244B1 EP96109592A EP96109592A EP0751244B1 EP 0751244 B1 EP0751244 B1 EP 0751244B1 EP 96109592 A EP96109592 A EP 96109592A EP 96109592 A EP96109592 A EP 96109592A EP 0751244 B1 EP0751244 B1 EP 0751244B1
Authority
EP
European Patent Office
Prior art keywords
controller
thread
thread tension
manipulated variable
friction
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
EP96109592A
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German (de)
English (en)
French (fr)
Other versions
EP0751244A2 (de
EP0751244A3 (de
Inventor
Hellmut Lorenz
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.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Oerlikon Textile GmbH and Co KG
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Publication date
Application filed by Oerlikon Textile GmbH and Co KG filed Critical Oerlikon Textile GmbH and Co KG
Publication of EP0751244A2 publication Critical patent/EP0751244A2/de
Publication of EP0751244A3 publication Critical patent/EP0751244A3/de
Application granted granted Critical
Publication of EP0751244B1 publication Critical patent/EP0751244B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements

Definitions

  • the invention relates to a method for controlling the thread tension according to the preamble of claim 1.
  • WO-A-9211535 discloses a control of the contact force in the false twist texturing as a function of the thread force.
  • a twist / conveying ratio (R / Y) defined as the quotient of the effective radius of the friction false-twist aggregate and the yarn speed is set by adjusting the point of application of the yarn on the friction false-twist aggregate and / or the yarn speed.
  • EP 0 207 471 D1 describes a method for monitoring the thread quality of the running thread. This method serves primarily the purpose that in the in the DE 33 06 594 A1 to discover any errors that occur.
  • the inventive method for controlling the yarn tension of a running yarn behind a friction false aggregate Falschzwirnk Hurselmaschine is characterized in that the controller constant of the controller during the process, ie during the control, is corrected.
  • the particular advantage of this approach is the fact that each job individually to the environmental conditions such. B. device tolerances, wear, thread speed, etc., which act as disturbances adjusts.
  • the regulator constant is corrected during control as a function of the disturbance variable acting on the friction false-twist aggregate or a controlled system.
  • the influence of the disturbance variable can be determined from the ratio between the thread tension and the disturbance variable in the instantaneous operating point or from the ratio between the thread tension and the adjustment signal at the operating point.
  • the determination of a corrected controller constant can take place on the basis of a predetermined controller characteristic field.
  • the controller map gives the relationship between the controller constant and the slope, which results from dividing the difference in the thread tension between two times and the difference of the manipulated variables or the adjustment signals at these times.
  • the controller characteristic field is determined by measurement or by empirical calculations and predefined for the machine.
  • the angle between the yarn running direction of the movement direction of the friction surface of the friction false-twist aggregate is measured as the manipulated variable.
  • the distance between the axes of Friktonswellen can be measured as a manipulated variable. Since the contact pressure of the friction surfaces has an influence on the yarn tension of a running yarn, it is proposed that the contact pressure of the friction surfaces is measured as a manipulated variable. According to a further advantageous concept, it is proposed that the thread speed of the thread is measured as a disturbance variable.
  • the correction in the controller constants takes place via a control, wherein the control deviation of the thread tension is regulated as a function of the control constants.
  • a PI controller is preferably used.
  • the PI controller has an integration factor and a proportionality factor, which have an influence on the behavior of the controller. The influence of the two factors is different on the controller. If the PI controller is too sensitive, this sensitivity can be influenced by changing the integration factor. If the controller is too sluggish, the proportionality factor can be increased. It should be noted that the controller on the one hand not in an unstable state or on the other hand not too slow and too slow.
  • the influencing of the control behavior of the PI controller takes place at defined time intervals, which are very large which means that the influence can be very slow.
  • the influencing of the control behavior of the PI controller can be automated via a control.
  • FIG. 1 further illustrates the determination of the gradient D at the operating point B1.
  • the gradient D is formed by the quotient of the difference between the thread tension ⁇ T and ⁇ S.
  • the gradient D can also be formed as a differential of the thread tension T as a function of the manipulated variable S in the operating point B1.
  • FIG. 2 shows a diagram of the thread tension T over the manipulated variable S. This diagram shows that when a new friction false-twist aggregate is put into operation, the relationship between the thread tension and the manipulated variable S is approximately hyperbolic, during this course after an operating time of 20 hours is significantly stretched and more closely approximated to a straight line course.
  • Fig. 3 shows a diagram showing the dependence of the thread tension T of the adjustment signal VS.
  • the thread tension decreases with increasing adjustment signal VS. From the diagram is also apparent that at a constant adjustment signal VS, the thread tension increases with increasing thread speed.
  • FIG. 4 shows a controller characteristic map which shows the relationship between the controller constant K and the gradient D.
  • the controller characteristic field is determined by measurement or by empirical calculations and predefined for the machine. From the controller map can then be determined with the newly determined slope D, the associated to this operating point controller constant K, which is then supplied as a corrected value KR to the controller.
  • Fig. 5 is a graph showing the dependence of the proportionality factor of the controller on the quotients ⁇ T / ( ⁇ D / Y), which is called the slope. From this diagram, it can be seen that the proportionality factor not only rises sharply with the slope, but also increases very sharply with decreasing yarn running speed.
  • the quotient defined as the pitch expresses the change in the yarn tension in response to the change in the swirl / feed ratio, the latter being the ratio of the effective diameter of the disks of the friction false twist unit to the yarn running speed.
  • Fig. 6 is a diagram showing the integration factor of the controller in the slope is shown. Depending on the thread running speed, the integration factor increases, with the integration factor dropping with increasing pitch. From Figs. 5 and 6 it can be seen that with increasing yarn running speed, based on a defined slope D, the proportionality factor P decreases, while the integration factor I increases.
  • Fig. 7 shows a schematic representation of a processing point of a false twisting crimping machine.
  • the synthetic thread 1 is replaced by the Input supply unit 3 deducted from the supply spool 2.
  • the texturing zone is formed between the input delivery 3 and the deduction delivery 9. Above all, it comprises a heating rail 4, a cooling rail 5 and the friction false-twist aggregate 6.
  • the friction false-twist aggregate has endlessly moving surfaces which are moved transversely to the thread axis and against which the thread rests. These endlessly moving surfaces are preferably designed as disks rounded at the outer edges. These surfaces impart a twist to the thread in the direction of the input delivery unit which dissolves again in the direction of the original delivery unit 9.
  • a measuring device 8 for measuring the yarn tension is arranged, which outputs the yarn tension T from the output signal. Not shown in Fig. 5 is arranged behind the Honenderwerk 9 winding or even there arranged optionally necessary intermediate treatment by heating.
  • the output signal T of the measuring device 8 for measuring the thread tension which represents the thread tension T, is converted by a filter 11 into a long-term value LW.
  • the long-term value LW is supplied together with a desired value to a control device 12.
  • the desired value and the long-term value are compared with each other and converted into an adjustment variable VS.
  • this adjustment value On the basis of this adjustment value, its control behavior is influenced by a PI controller 13 by taking into account the ratio of the change in the thread tension to change a current value corresponding to the adjustment variables, ie the proportionality factor and / or the integral factor of the regulator are influenced.
  • This adjustment variable corrected in this way is fed to an actuator 7 of the friction false-twist aggregate 6, wherein the actuator 7 is the Swirl transmission of Fritationsfalschdrall aggregate 6 on the thread 1 controls.
  • the output signal T of the measuring device 8 for measuring the thread tension as well as the adjustment signal to an evaluation device 10 is supplied.
  • the adjustment signal represents the adjustment signal of the thread tension corrected by the PI controller 13 by the ratio ⁇ T / ⁇ I.
  • the evaluation device 10 provides an evaluation of the current output signal T, which represents the currently measured thread tension, in accordance with the principles set forth in US Pat EP 207 471 A1 are described.
  • an upper limit value and a lower limit value for the adjustment signal VS are stored in the evaluation device 10 (GOVS, GUVS). If the adjustment signal VS exceeds one of these limits, an alarm signal is preferably output. Furthermore, in the evaluation device 10, a difference value DU is formed between the current output signal T and the adjustment signal VS, after both have previously been converted into compatible, comparable quantities. Finally, the upper limit value and the lower limit value of this difference signal DU (GUDU) are stored in the evaluation device 10, and an alarm signal A is preferably output if the difference signal DU between the adjustment signal and the currently measured output signal D is one of the limit values GODU, GUDU exceeds.
  • the friction false-twist aggregate 6, as shown in Figs. 8 and 9, has three parallel shafts 16, 17 and 18 arranged at the vertices of an equilateral triangle.
  • the shafts 16, 17 and 18 are rotatably mounted in a frame 19.
  • the shaft 16 serves as a drive shaft, which is driven by a drive belt 20.
  • the transmission of the rotational movement of the shaft 16 is effected by two drive belts 21, 20, which are guided via pulleys 23, 24 and 25.
  • the pulley 23 is open the shaft 17, the pulley 24 on the shaft 18 and the pulley 25 on the shaft 16 arranged.
  • the pulley 25 is formed as a double pulley, so that over this the drive belt 21, 22 are guided.
  • the discs 26, 27, 28; 29, 30, 31 are connected to the shafts 16, 17, 18 non-positively or positively. However, each disc can be deducted from its shaft.
  • each disc can be deducted from its shaft.
  • In order to set and maintain the distance between the disks 26, 27, 28, 29, 30, 31 of a shaft 16, 17, 18, 18 are different sleeve-shaped spacers 32, 33, 34, 35, 36 on each shaft 16, 17, , 37 pushed.
  • For axial fixing of the spacers 32, 33, 34; 35, 36, 37 and the discs 26, 27, 28, 29, 30, 31 serve screws 38 in the head of each shaft, 16, 17, 18.
  • the shaft spacings and the disc diameters are designed so that - as shown in FIG. 9 - the discs 26, 27, 28 and the discs 29, 30, 31 overlap.
  • a so-called "overlapping triangle” is formed with circular-arc-shaped sides. Between the sides of this triangle, the thread 1 is clamped on its course by the Fritationsfalschdrall aggregate between the disc groups to form a helical line. It is possible to use a friction false-twist aggregate with more than three discs and thus with more than three waves each disc group.
  • Each disc 26, 27, 28, 29, 30, 31 has a friction surface 39.
  • the angle between the yarn running direction and the direction of movement of the friction surface 39 is measured as a manipulated variable.
  • the distance between the shafts 16, 17, 18 can be measured as a manipulated variable. Since the contact pressure of the friction surfaces 39 has an influence on the yarn tension of a running yarn, the contact pressure of the friction surfaces can be measured as a manipulated variable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Feedback Control In General (AREA)
  • Warping, Beaming, Or Leasing (AREA)
EP96109592A 1995-06-30 1996-06-14 Verfahren zur Regelung der Fadenzugkraft Expired - Lifetime EP0751244B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19523995 1995-06-30
DE19523995 1995-06-30

Publications (3)

Publication Number Publication Date
EP0751244A2 EP0751244A2 (de) 1997-01-02
EP0751244A3 EP0751244A3 (de) 2001-09-19
EP0751244B1 true EP0751244B1 (de) 2007-08-08

Family

ID=7765761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109592A Expired - Lifetime EP0751244B1 (de) 1995-06-30 1996-06-14 Verfahren zur Regelung der Fadenzugkraft

Country Status (7)

Country Link
US (1) US5664409A (ja)
EP (1) EP0751244B1 (ja)
JP (1) JP3699535B2 (ja)
KR (1) KR100396155B1 (ja)
CN (1) CN1066500C (ja)
DE (1) DE59611441D1 (ja)
TW (1) TW368525B (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3196712B2 (ja) * 1998-02-26 2001-08-06 村田機械株式会社 仮撚加工機
CN101831736B (zh) * 2009-12-09 2011-08-03 湖南云锦集团股份有限公司 一种环锭纺生产超柔赛络纺纱线的专用装置
CN104773610A (zh) * 2015-03-31 2015-07-15 如皋市丁堰纺织有限公司 一种络筒张力调节装置
CN105584886B (zh) * 2015-11-23 2018-11-23 国网河北省电力有限公司沧州供电分公司 一种船舶电缆绞车驱动系统的控制方法
EP3634896B1 (de) * 2017-06-07 2021-08-11 Oerlikon Textile GmbH & Co. KG Verfahren und vorrichtung zur überwachung einer fadenspannung an einem laufenden faden
US10851479B2 (en) * 2017-11-01 2020-12-01 The Hong Kong Polytechnic University Apparatus and method for imparting false twist to a yarn
CN107829181B (zh) * 2017-11-08 2023-05-12 宜昌经纬纺机有限公司 一种电动张力器、捻线机及张力控制方法
DE102019004302A1 (de) * 2019-05-29 2020-12-03 Detlef Görgens Antriebseinheit, mit fadenspannungsgesteuerter Spindeldrehzahl des Falschzwirnkräuselaggregats in einer Texturiermaschine
ES2757301A1 (es) * 2019-06-20 2020-04-28 Twistperfect S L Procedimiento para establecer la altura optima de trabajo entre el punto de entrada y el punto de salida del hilo en una maquina retorcedora y/o hiladora de hilo, y maquina retorcedora y/o hiladora de hilo que aplica dicho procedimiento

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
FR2115180B1 (ja) * 1970-11-28 1974-06-07 Schubert & Salzer Maschinen
DE2155514B2 (de) * 1971-11-09 1975-08-14 Barmag Barmer Maschinenfabrik Ag, 5600 Wuppertal Arbeitsverfahren zum Anlegen des Fadens an eine Streck- und Falschdrahtkräuselmaschine
US4015414A (en) * 1974-06-12 1977-04-05 The Warner & Swasey Textile Machine Company Monitored twist control apparatus and method
JPS5545849A (en) * 1978-09-27 1980-03-31 Oda Gosen Kogyo Kk False twisting method and apparatus
EP0022743B1 (de) * 1979-07-14 1984-01-04 b a r m a g Barmer Maschinenfabrik Aktiengesellschaft Vorrichtung zum Falschzwirnen eines Fadens und Anwendung dieser Vorrichtung bei der Herstellung eines Garnes
DE3306594A1 (de) * 1982-05-21 1983-11-24 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Verfahren zum falschzwirntexturieren
CN1027926C (zh) * 1985-07-03 1995-03-15 巴马格巴默机器制造股份公司 运转纱线的连续监控方法
DE3729426A1 (de) * 1987-09-03 1989-03-16 Stahlecker Fritz Verfahren zum stillsetzen und wiederanfahren einer maschine zum pneumatischen falschdrallspinnen
US4896407A (en) * 1989-03-03 1990-01-30 Milliken Research Corporation Air pressure control for yarn texturing processes
US5146739A (en) * 1990-01-26 1992-09-15 Barmag Ag Yarn false twist texturing process and apparatus
WO1992011535A1 (de) * 1990-12-19 1992-07-09 Barmag Ag Verfahren zur regelung der fadenzugkraft
TW354078U (en) * 1991-01-17 1999-03-01 Barmag Barmer Maschf Apparatus for monitoring the tension of an advancing yarn
DE59300117D1 (de) * 1992-02-10 1995-05-11 Barmag Barmer Maschf Verfahren zur Regelung der Fadenzugkraft des laufenden Fadens in einer Falschzwirntexturiermaschine.
DE4492654B4 (de) * 1993-04-29 2004-10-21 Saurer Gmbh & Co. Kg Verfahren zur Fehlerdiagnose in einem Herstellungsprozess eines synthetischen Fadens

Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
TW368525B (en) 1999-09-01
EP0751244A2 (de) 1997-01-02
EP0751244A3 (de) 2001-09-19
US5664409A (en) 1997-09-09
JP3699535B2 (ja) 2005-09-28
DE59611441D1 (de) 2007-09-20
KR100396155B1 (ko) 2003-11-20
JPH09137322A (ja) 1997-05-27
CN1066500C (zh) 2001-05-30
KR970001633A (ko) 1997-01-24
CN1142550A (zh) 1997-02-12

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