EP0751244A2 - Procédé pour le réglage de la force de tension de fil - Google Patents

Procédé pour le réglage de la force de tension de fil Download PDF

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Publication number
EP0751244A2
EP0751244A2 EP96109592A EP96109592A EP0751244A2 EP 0751244 A2 EP0751244 A2 EP 0751244A2 EP 96109592 A EP96109592 A EP 96109592A EP 96109592 A EP96109592 A EP 96109592A EP 0751244 A2 EP0751244 A2 EP 0751244A2
Authority
EP
European Patent Office
Prior art keywords
thread
thread tension
false twist
controller
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.)
Granted
Application number
EP96109592A
Other languages
German (de)
English (en)
Other versions
EP0751244B1 (fr
EP0751244A3 (fr
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
Barmag AG
Barmag Barmer Maschinenfabrik AG
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.)
Filing date
Publication date
Application filed by Barmag AG, Barmag Barmer Maschinenfabrik AG filed Critical Barmag AG
Publication of EP0751244A2 publication Critical patent/EP0751244A2/fr
Publication of EP0751244A3 publication Critical patent/EP0751244A3/fr
Application granted granted Critical
Publication of EP0751244B1 publication Critical patent/EP0751244B1/fr
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 regulating the thread tension according to the preamble of claim 1.
  • EP 0 439 183 B1 describes a method for monitoring the thread tension of a running thread in the texturing zone of a false twist crimping machine, in which the thread tension is thereby It is corrected that this is converted into an adjustment signal via a time filter and through this the size and / or the component distribution of the frictional force of the false twist unit on the thread is controlled, the adjustment signal being used as the signal representing the current average of the current measured value for quality monitoring.
  • the adjustment signal by means of which the thread tension is corrected, is thus monitored to determine whether it leaves the predetermined range between the upper limit value and the lower limit value.
  • These limit values are used to output an alarm signal when the adjustment signal leaves the area between these limit values.
  • the difference between the currently measured thread tension after appropriate shaping can be compared with the adjustment signal and an alarm signal can be issued if the difference signal leaves a predetermined range between an upper limit value and a lower limit value.
  • the method according to the invention for regulating the thread tension of a running thread behind a friction-wrong unit of a false twist crimping machine is characterized in that the regulator constant of the regulator is corrected while the process is running, ie during regulation.
  • the particular advantage of this procedure is the fact that each work station individually to the environmental conditions, such as. B. device tolerances, wear, thread speed, etc., which act as disturbances.
  • the regulator constant is corrected during the regulation as a function of the disturbance variable acting on the friction false twist unit or a controlled system.
  • the influence of the disturbance variable can be determined from the relationship between the thread tension and the disturbance variable at the current operating point or from the relationship between the thread tension and the adjustment signal at the operating point.
  • a corrected controller constant can be determined on the basis of a predetermined controller map.
  • the controller map shows the relationship between the controller constant and the slope, which is obtained by dividing the difference in thread tension between two times and the difference between the manipulated variables and the adjustment signals at these times.
  • the controller map is determined by measurement or empirical calculations and given to the machine.
  • the corrected controller constant associated with this operating point which is supplied to the controller as a corrected value, can then be determined with the new slope value. It is thus achieved that the dependencies between manipulated variable and controller variable, which differ from work station to work station, as well as the dependence on the disturbance variables, are different do not affect the thread quality. This means that the controllers of each texturing point have individual controller constants. The controller constant is not determined continuously, but if necessary or according to certain time patterns.
  • the angle between the thread running direction and the direction of movement of the friction surface of the friction false twist unit is preferably measured as a manipulated variable.
  • the distance between the axes of the Frikton shafts can also be measured as a manipulated variable. Since the contact pressure of the friction surfaces has an influence on the thread tensile force of a running thread, it is proposed that the contact pressure of the friction surfaces be measured as a manipulated variable. According to a further advantageous idea, it is proposed that the thread speed of the thread is measured as a disturbance variable.
  • the correction in the controller constant takes place via a control, the control deviation of the thread tension being controlled as a function of the control constant.
  • a PI controller is preferably used to regulate the thread tension.
  • the PI controller has an integration factor and a proportionality factor, which influence the behavior of the controller. The influence of the two factors on the controller is different. If the PI controller is too sensitive, this sensitivity can be influenced by changing the integration factor. If the controller is too slow, the proportionality factor can be increased. It should be noted that on the one hand the controller does not become unstable or on the other hand it does not become too slow and sluggish.
  • control behavior of the PI controller is influenced at defined time intervals, which are very large can be, which means that the influence can be very slow.
  • control behavior of the PI controller can be influenced automatically via a control.
  • 1 shows a diagram of the thread tension over the manipulated variable S, which illustrates for the position curves indicated as parameters in the diagram that different curves of the thread tension over the manipulated variable S result for different friction false twist units of a false twist crimping machine. This surprising result is all the more remarkable since the same components and the same type of control were used for all friction false twist units. 1 also shows the determination of the slope D at the operating point B1.
  • the slope D is formed by the quotient from the difference between the thread tension ⁇ T and ⁇ S.
  • the slope D can also be formed as a differential of the thread tension T as a function of the manipulated variable S at 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 unit 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 clearly stretched and more closely approximated to a straight line.
  • FIG. 3 shows a diagram which shows the dependence of the thread tension T on the adjustment signal VS.
  • the thread tension decreases with increasing adjustment signal VS. From the diagram it can also be seen that at a constant adjustment signal VS the thread tension increases with increasing thread speed.
  • Fig. 4 shows a controller map that shows the relationship between the controller constant K and the slope D.
  • the controller map is determined by measurement or empirical calculations and given to the machine. From the controller map, the newly determined slope D can then be used to determine the controller constant K associated with this operating point, which is then supplied to the controller as a corrected value KR.
  • FIG. 5 shows a diagram which shows the dependency of the proportionality factor of the controller on the quotients ⁇ T / ( ⁇ D / Y), which is referred to as the slope. From this diagram it can be seen that the proportionality factor not only rises sharply with the slope, but also rises very sharply with falling yarn speed.
  • the quotient defined as the slope expresses the change in thread tension as a function of the change in the twist / conveying ratio, the latter being the ratio of the effective diameter of the disks of the friction false twist unit to the thread running speed.
  • FIGS. 5 and 6 shows a diagram to illustrate the integration factor of the controller on the slope.
  • the integration factor increases as a function of the thread running speed, the integration factor falling with increasing gradient. It can be seen from FIGS. 5 and 6 that with increasing thread running speed, based on a defined pitch 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 twist crimping machine.
  • the synthetic thread 1 is by the Input delivery unit 3 subtracted from the supply spool 2.
  • the texturing zone is formed between the input delivery unit 3 and the take-off delivery unit 9. It mainly comprises a heating rail 4, a cooling rail 5 and the friction false twist unit 6.
  • the friction false twist unit has endlessly moving surfaces which are moved transversely to the thread axis and against which the thread lies. These endlessly moving surfaces are preferably designed as discs that are rounded on the outer edges. These surfaces give the thread a twist in the direction of the input delivery unit, which dissolves again in the direction of the output delivery unit 9.
  • the output signal T of the measuring device 8 for measuring the thread tension which represents the thread tension T, is converted via a filter 11 into a long-term value LW.
  • the long-term value LW is supplied to a control device 12 together with a target value.
  • the target value and the long-term value are compared with one another and converted into an adjustment variable VS.
  • a PI controller 13 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 the change in a current value corresponding to the adjustment variables, ie the proportionality factor and / or the integral factor of the controller are influenced.
  • This adjustment variable corrected in this way is fed to an actuator 7 of the friction false twist unit 6, the actuator 7 being the Swirl transmission of the friction false twist unit 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 is fed to an evaluation device 10.
  • 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 described in EP 207 471 A1.
  • an upper limit value and a lower limit value for the adjustment signal VS are stored in the evaluation device 10. If the adjustment signal VS exceeds one of these limit values, an alarm signal is preferably output. Furthermore, a difference value DU is formed in the evaluation device 10 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 (GODU; GUDU) are stored in the evaluation device 10, and an alarm signal A is preferably output when 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 unit 6, as shown in FIGS. 8 and 9, has three parallel shafts 16, 17 and 18 arranged in the corner points 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 rotary movement from the shaft 16 is carried out by two drive belts 21, 20, which are guided by pulleys 23, 24 and 25.
  • the pulley 23 is on the shaft 17, the pulley 24 on the shaft 18 and the pulley 25 arranged on the shaft 16.
  • the pulley 25 is designed as a double pulley, so that the drive belts 21, 22 are guided over it.
  • the friction false twist unit 6 has two groups of disks 26, 27, 28; 29, 30, 31, the number of disks 26, 27, 28; 29, 30, 31 of each group corresponds to the number of rotating shafts 16, 17, 18. Accordingly, the first group of disks 26, 27, 28 and the second group of disks 29, 30, 31 comprises. The disks of each group follow each other in the thread running direction with the same distance.
  • the disks 26, 27, 28; 29, 30, 31 are connected to the shafts 16, 17, 18 in a non-positive or positive manner. However, each disc can be pulled off its shaft.
  • different sleeve-shaped spacers 32, 33, 34, 35, 36 are provided over each shaft 16, 17, 18 , 37 pushed.
  • the spacers 32, 33, 34; 35, 36, 37 and the disks 26, 27, 28, 29, 30, 31 serve screws 38 in the head of each shaft, 16, 17, 18.
  • the shaft distances and the disk diameter are designed so that - as in Fig. 9 - the disks 26, 27, 28 and the disks 29, 30, 31 overlap.
  • Each disk 26, 27, 28, 29, 30, 31 has a friction surface 39.
  • the angle between the thread 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 also be measured as a manipulated variable. Since the contact pressure of the friction surfaces 39 has an influence on the thread tension of a running thread, 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 Procédé pour le réglage de la force de tension de fil Expired - Lifetime EP0751244B1 (fr)

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 true EP0751244A2 (fr) 1997-01-02
EP0751244A3 EP0751244A3 (fr) 2001-09-19
EP0751244B1 EP0751244B1 (fr) 2007-08-08

Family

ID=7765761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109592A Expired - Lifetime EP0751244B1 (fr) 1995-06-30 1996-06-14 Procédé pour le réglage de la force de tension de fil

Country Status (7)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN114364831A (zh) * 2019-06-20 2022-04-15 特威斯特普非特公司 在加捻机和/或纺纱机中设置纱线的进入点和离开点之间的最佳工作高度的方法以及应用这种方法的加捻机和/或纺纱机

Families Citing this family (7)

* 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
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 (fr) * 2017-06-07 2021-08-11 Oerlikon Textile GmbH & Co. KG Procédé et dispositif de surveillance d'une tension du fil sur un fil en cours de déplacement
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

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
FR2115180B1 (fr) * 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 (fr) * 1979-07-14 1984-01-04 b a r m a g Barmer Maschinenfabrik Aktiengesellschaft Appareil pour la fausse-torsion de fils et utilisation de cet appareil pour la fabrication d'un fil
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
RU2092633C1 (ru) * 1990-12-19 1997-10-10 Бармаг АГ Способ регулирования силы натяжения движущейся нити позади вьюрка фрикционного типа машины для ратинирования ткани
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.
WO1994025869A1 (fr) * 1993-04-29 1994-11-10 Barmag Ag Procede permettant de diagnostiquer des erreurs dans le processus de fabrication d'un fil synthetique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN114364831A (zh) * 2019-06-20 2022-04-15 特威斯特普非特公司 在加捻机和/或纺纱机中设置纱线的进入点和离开点之间的最佳工作高度的方法以及应用这种方法的加捻机和/或纺纱机
CN114364831B (zh) * 2019-06-20 2023-06-16 特威斯特普非特公司 在加捻机和/或纺纱机中设置纱线的进入点和离开点之间的最佳工作高度的方法以及应用这种方法的加捻机和/或纺纱机

Also Published As

Publication number Publication date
JP3699535B2 (ja) 2005-09-28
EP0751244B1 (fr) 2007-08-08
EP0751244A3 (fr) 2001-09-19
KR970001633A (ko) 1997-01-24
CN1142550A (zh) 1997-02-12
CN1066500C (zh) 2001-05-30
US5664409A (en) 1997-09-09
JPH09137322A (ja) 1997-05-27
KR100396155B1 (ko) 2003-11-20
DE59611441D1 (de) 2007-09-20
TW368525B (en) 1999-09-01

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