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WO2020078651A9 - Régulation de la pression dans un banc d'étirage - Google Patents

Régulation de la pression dans un banc d'étirage Download PDF

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Publication number
WO2020078651A9
WO2020078651A9 PCT/EP2019/074976 EP2019074976W WO2020078651A9 WO 2020078651 A9 WO2020078651 A9 WO 2020078651A9 EP 2019074976 W EP2019074976 W EP 2019074976W WO 2020078651 A9 WO2020078651 A9 WO 2020078651A9
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
drafting
roller
drafting system
sub
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.)
Ceased
Application number
PCT/EP2019/074976
Other languages
German (de)
English (en)
Other versions
WO2020078651A1 (fr
Inventor
Thomas Schmitz
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.)
Truetzschler GmbH and Co KG
Original Assignee
Truetzschler GmbH and Co KG
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 Truetzschler GmbH and Co KG filed Critical Truetzschler GmbH and Co KG
Priority to EP19772703.5A priority Critical patent/EP3867427A1/fr
Priority to CN201980067433.XA priority patent/CN112840068B/zh
Publication of WO2020078651A1 publication Critical patent/WO2020078651A1/fr
Publication of WO2020078651A9 publication Critical patent/WO2020078651A9/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • D01H5/46—Loading arrangements
    • D01H5/52—Loading arrangements using fluid pressure
    • D01H5/525—Loading arrangements using fluid pressure for top roller arms

Definitions

  • the invention relates to the regulation of the pressure of elements of a drafting system.
  • a drafting system essentially consists of several driven bottom rollers, against which one or more associated top rollers are pressed. Because of this contact pressure, the top rollers are rotatably carried along by the associated bottom roller. Taking away is favored, for example, by means of a preferably elastic friction cover or lining on the top rollers.
  • fiber material is passed between the associated pairings of rollers.
  • the contact pressure leads to a holding of the fiber material in relation to the downstream arrangement of the lower roller and the upper roller (s), whereby the stretching is realized.
  • Both the holding of the fiber material and the entrainment of the associated, pressed-on rolling roller (s) leads to wear on the cover. Excessive contact pressure favors faster wear.
  • the load on the bearings increases, in which the rollers are freely rotatable. These must be interpreted accordingly, which is costly.
  • the object of the invention is to counter the aforementioned disadvantages.
  • a method for regulating a pressure of stretching upper rollers of a textile machine has one cycle.
  • This cycle comprises a first step of detecting at least one operating parameter of the textile machine which influences the load on at least one drafting system upper roller.
  • the operating parameters include, for example, the fiber material used, the operating speed of the drafting rollers and climatic conditions.
  • the cycle includes a second step.
  • the second step is divided into different sub-processes.
  • a first part of the process comprises a first part of the determination of the pressure of the at least one drafting unit upper roller by means of the detected operating parameter.
  • the pressure determined is displayed in a second sub-step of this sub-process.
  • a user is able, for example, to change the pressure on the at least one upper drafting roller via a touch-sensitive screen.
  • a second subprocess is provided alternatively or in addition to the first subprocess.
  • This sub-process comprises a fourth sub-step of determining whether the detected operating parameter lies within a predetermined range or falls below or exceeds a predetermined threshold value. If it has been determined that the detected operating parameter lies outside the range or exceeds or falls below the threshold value, the second sub-process comprises a fifth sub-step of changing the pressure on the drafting roller in such a way that it can be assumed that the predetermined operating parameter is in the range reached or reached or fallen below or exceeded the threshold.
  • the method preferably also has an initial step of determining the range or threshold value before executing said cycle. Before the drafting system begins to work, for example, these values are determined and used as a basis for the aforementioned regulation.
  • the initial step preferably comprises a step of making it possible to enter the range or threshold value and / or a step of determining the range or threshold value on the basis of a processing speed of the textile machine and a fiber material currently to be processed.
  • the latter step enables the drafting system to be started again very quickly due to a lot change; downtimes are reduced.
  • the determination step is preferably carried out by reading out a database in which at least the data defining speed data, fiber material and data defining the pressure of the drafting roller are assigned to one another.
  • the database therefore represents a knowledge base for the drafting control, so that the necessary entries only have to be made once.
  • Each of the aforementioned methods is preferably designed as a self-learning method.
  • Supervised learning is an advantage here and can be carried out by the manufacturer, for example, on a newly designed drafting system. This has the advantage that the customer's drafting system is ideally ready for use immediately, without the need for adjustments.
  • the above cycle is preferably repeated at regular intervals. This may be due to the fact that the climatic Repeat conditions in the morning and change throughout the day, resulting in changes to the platen setting. Alternatively or additionally, this cycle is carried out in the presence of a predetermined state.
  • Such a condition can include changing the fiber material to be drawn as or a roller or also (restarting) the drafting device or the textile machine.
  • the one cycle can be carried out several times in accordance with the number of upper drafting rollers to be monitored and / or related to the pressure of a plurality of upper drafting rollers.
  • the pressure on each lower roller is set individually in extreme cases.
  • the pressure is set for several, in the extreme case for all bottom rollers with the same pressure setting.
  • the above-mentioned operating parameters preferably include technological output parameters of the drafting device or textile machine and / or load data of at least one drive motor of one of the at least one drafting device lower roll. I.e. Data that are easy to determine by sensors are sufficient to implement the pressure control.
  • Each of the aforementioned methods is preferably designed as a computer-implemented method.
  • the method can thus be provided as a firmware update, for example, so that existing textile machines can also be retrofitted with the pressure control according to the invention.
  • the invention further relates to a drafting device with a pressure drive section, for example having at least one pneumatic cylinder, and at least one drafting device.
  • This drafting system is provided with a plurality of lower drafting rollers, a plurality of upper drafting rollers and a plurality of pressure arms.
  • the pressure arms are coupled to the pressure drive section in such a way that the pressure drive section is able to press an associated one of the upper stretching rollers against an assigned lower drawing roller via the pressure arms.
  • the drafting device comprises a controller or is coupled to such a controller, for example via a bus.
  • the controller is set up to carry out one of the aforementioned methods by means of at least one pressure drive section for at least one drafting roller. That is, the invention can be used universally.
  • a textile machine according to the invention has such a drafting device.
  • the pressure drive section in this case comprises a pressure regulator which is connected between a pneumatic drive for the at least one drafting roller and the pressure arm belonging to the at least one drafting roller.
  • Diaphragm control valves can be used as pressure regulators, for example.
  • the textile machine is preferably designed as a draw frame, belt winder, comber, flyer or spinning machine.
  • FIG. 2 shows the stretching section from FIG. 1 in greater detail
  • 3 shows a control according to an embodiment of the invention
  • FIG. 4 shows a regulation according to another embodiment of the invention
  • FIG. 1 shows an arrangement 1 with a gate 2 and a line 100 connected in a conventional arrangement.
  • the gate 2 is constructed in a known manner and will not be described further.
  • the line 100 has, inter alia, a can deposit device 110 on the output side.
  • the can depositing device 110 comprises a can rail 111 for the full cans and a can path 112, which is preferably driven, which moves empty cans into the actual can changer.
  • the can changer has, for example, a can slide 113 in a known manner.
  • An operating platform 102 is located to the side of the stretch 100.
  • An operating terminal 101 is located here at one end of the operating platform 102.
  • a drafting hood 103 can be seen, which covers a stretching section 120 in a known manner.
  • FIG. 2 shows the stretching section 120 from FIG. 1 in greater detail.
  • the stretching section 120 is designed, for example, as a 4-over-3 drafting arrangement. That is, the stretching section 120 has four top rollers 125-128 (only the top rollers 125 and 126 are visible).
  • the upper roller 125 is pressed against the associated lower roller 129 by means of pressure pistons 134, 135 via bearings 132, 133, in which the upper roller 125 is freely rotatably supported.
  • the upper roller 126 is accordingly pressed against the associated lower roller 130.
  • the upper rollers 127, 128 (not visible here) are pressed against the lower roller 131 by means of the pressure arms 123, 124.
  • Pneumatic lines 139 can be seen on a left side, via which compressed air is fed into the pressure arms 121-124. Alternatively, the pressure is only conducted into the two front pressure arms 121, 122. Sensor lines 140 can also be seen, which open into the respective pressure arms 121-124. Pressure sensors or sensors are arranged in the pressure arms 121-124, for example, which can determine an extended position of the associated top roller 125-128. Furthermore, pressure rods 136-138 can be seen, which are also pressed against a respective top roller 125-127 in order to reduce or even avoid the formation of reels.
  • FIG. 3 shows a control system for the stretching section 120 shown in FIG. 2.
  • a single pressure regulator 141 is provided, which acts directly on each top roller 125-128 via pneumatic lines 139. It is clear that this is only schematic. In reality, the pressure regulator 141 is coupled to respective pressure cylinders, which press on the respective bearings 132, 133 of the associated top roller 125 via associated pistons 134, 135.
  • Initial settings are entered into the pressure regulator 141 via a coupling or data connection 143.
  • the setting values are depending on the fiber material.
  • the pressure regulator 141 is given various setting values.
  • Via a sensor device 142 which can include, for example, the sensors shown in FIG. 2, the pressure regulator 141 is given values which influence the setting of the pressure from the top rollers 125-128 to the associated bottom roller 129-131.
  • Such sensor values can be, for example, the maximum extension position of the respective top roller 124-128.
  • FIG. 4 shows a control according to another embodiment of the invention.
  • each lower roller 129-131 or the associated upper rollers 120-128 is assigned its own pressure regulator 141. Since, as a rule, the upper rollers 145-128 are provided with the same reference, the pressure regulators 141 are correspondingly input via the respective coupling 143 to the same setting values.
  • each pressure regulator 141 is coupled to its own sensor device 142 via sensor lines 140, each pressure regulator 141 can individually set an optimal pressure for the respective lower roller 129-131 or the associated upper rollers 125-128. Since the top rollers 127, 128 are pressed against one and the same bottom roller 131, it is provided in the example shown that both top rollers 127, 128 are act pressure regulator 141. But it can of course also be provided to assign each top roller 127, 128 its own pressure regulator 141. By means of the illustrated regulation, the invention enables a method for regulating the pressure of drafting rollers 125-128 against associated bottom rollers 129-131 of drafting section 120.
  • At least one operating parameter influencing the load of at least one drafting roller 125-128 is recorded.
  • Such an operating parameter can take into account the fiber material to be processed, the rotational speed of the respective drafting device lower roller 129-131 as well as the ratio of this rotational speed to the speed of a lower roller 130, 131 upstream in the direction of sliver transport.
  • the pressure of the respective drafting roller 125-128 is determined by means of the at least one recorded operating parameter. If it is recognized, for example, that the cover of the respective drafting roller 125-128 is slightly worn, the pressure is automatically reduced somewhat, for example on the basis of a database. The pressure determined is preferably displayed to a user in this subprocess.
  • a user is able to change the pressure. This makes it possible, for example, to change the automatically determined values based on empirical values. The values determined are thus a kind of suggestion and thus facilitate the operation of the stretching section 120. The stretching section 120 can thus also be operated by a less experienced user.
  • a second sub-process can be provided. This sub-process includes determining whether the detected operating parameter is within a predetermined range. This can be achieved using a conventional threshold value analysis.
  • the pressure on the associated drafting roller 125-128 is adjusted in such a way that it can be assumed that the predetermined operating parameter is in the desired area or the threshold value analysis delivers a positive result. This method is thus an approximation of the pressure to the pressure which is required for the smooth functioning of the stretching section 120. This also prevents the pressure from being changed suddenly, which can have a negative impact when stretching.
  • the range or threshold value is preferably initially determined in a first step. This determination can include reading out a database, for example. However, it can of course also be provided that the range or threshold value can be entered.
  • the method can also be set up to be self-learning. This means that the stretching section 120 adjusts the pressure automatically in a test run, and the associated pressure regulator 141 is preferably trained in the method, so that it adjusts itself automatically according to a conventional learning method.
  • the method steps mentioned form a cycle according to the invention, which can be repeated.
  • the repetition can take place at regular intervals, for example once an hour, or if a certain condition is present.
  • This condition can change to stretching fiber material means the change of a roller and the (new) start of the stretching section 120 or the stretch 100.
  • the cycle is carried out several times according to the number of drafting rollers 125-128 to be monitored, i. H. with the drafting system 120 described up to four times. If the same is related to several upper stretching rollers 127, 128, as shown at the bottom right in FIG. 4, the cycle is carried out, for example, three times.
  • the aforementioned operating parameters can include technological output parameters of the stretch section 120 or the stretch 100.
  • load data of a drive motor (for example its temperature) can be included in order to avoid overloading the drive of the stretch section 120. This enables the stretching section 120 to be braked, although its production decreases, but damage to the stretching section 120 and thus failure can be avoided.
  • the method according to the invention is preferably implemented in a computer.
  • the invention is not limited to the prescribed embodiments.
  • the invention can be applied to any type of stretching section. This applies, for example, to drafting systems on belt winders, combers, flyers and spinning machines.
  • top rollers 125-128 can be assigned to a single pressure regulator 141.
  • the stretching section 120 can also be designed differently, that is to say comprise a different number of upper and / or lower rolls.
  • the invention provides a very simple and universally applicable possibility of optimally adjusting the pressure of the top roller 125-128 and thus the life of the top roller 125-128n and thus the entire text to improve the machine.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

Dans un procédé de régulation de la pression pour des cylindres supérieurs de banc d'étirage (125-128), un paramètre fonctionnel influençant la charge d'un cylindre supérieur de banc d'étirage (125-128) est détecté. Dans un processus secondaire, la pression du cylindre supérieur de banc d'étirage (125-128) est détectée et indiquée au moyen du paramètre fonctionnel détecté. Le procédé permet à un utilisateur de modifier la pression sur le cylindre supérieur de banc d'étirage (125-128). Ce procédé peut comprendre une détermination pour savoir si le paramètre de fonctionnement détecté se situe dans une plage prédéterminée. ou est inférieur ou supérieur à un seuil prédéterminé. Si tel n'est pas le cas, la pression au niveau du cylindre supérieur de banc d'étirage (125-128) est modifiée de telle sorte que la condition spécifiée puisse être considérée comme remplie. Une section d'entraînement de pression (139; 132, 133; 134,135; 141) d'un dispositif de banc d'étirage (120) avec un banc d'étirage (120) à plusieurs cylindres inférieurs et supérieurs de banc d'étirage et bras presseur (121-124), est conçue pour presser, au moyen d'un bras presseur (121-124), un cylindre supérieur de banc d'étirage (125-128) contre un cylindre inférieur de banc d'étirage (129-131). Une commande (141) réalise le procédé au moyen d'une section d'entraînement de pression (139; 132, 133; 134, 135; 141) pour un cylindre supérieur de banc d'étirage (125-128). La section d'entraînement de pression (139; 132, 133; 134, 135; 141) comporte un régulateur de pression (141) monté entre un entraînement pneumatique pour le cylindre supérieur de banc d'étirage (125-128) et le bras presseur (121-124) associé.
PCT/EP2019/074976 2018-10-15 2019-09-18 Régulation de la pression dans un banc d'étirage Ceased WO2020078651A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19772703.5A EP3867427A1 (fr) 2018-10-15 2019-09-18 Régulation de la pression dans un banc d'étirage
CN201980067433.XA CN112840068B (zh) 2018-10-15 2019-09-18 牵伸机构上的压力调节方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018125547.0A DE102018125547A1 (de) 2018-10-15 2018-10-15 Druckregelung an einem Streckwerk
DE102018125547.0 2018-10-15

Publications (2)

Publication Number Publication Date
WO2020078651A1 WO2020078651A1 (fr) 2020-04-23
WO2020078651A9 true WO2020078651A9 (fr) 2020-06-11

Family

ID=67998472

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/074976 Ceased WO2020078651A1 (fr) 2018-10-15 2019-09-18 Régulation de la pression dans un banc d'étirage

Country Status (4)

Country Link
EP (1) EP3867427A1 (fr)
CN (1) CN112840068B (fr)
DE (1) DE102018125547A1 (fr)
WO (1) WO2020078651A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN120153136A (zh) * 2022-12-21 2025-06-13 特吕茨施勒集团欧洲公司 用于预防性识别纺纱机器的牵伸机构中的停机状态的方法以及纺纱机器的牵伸机构

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19652372A1 (de) * 1996-12-17 1998-06-18 Zinser Textilmaschinen Gmbh Pneumatische Belastungsvorrichtung eines Streckwerkes in einer Spinnmaschine
AU2001295484A1 (en) * 2000-08-23 2002-03-04 Rieter Ingolstadt Spinnereimaschinenbau Ag Method for operating drawing equipment and drawing equipment
CH696467A5 (de) * 2002-07-29 2007-06-29 Truetzschler Gmbh & Co Kg Vorrichtung zur Belastung der Oberwalzen eines Streckwerks für Textilfaserbänder.
DE102005020506A1 (de) * 2005-04-29 2006-11-09 TRüTZSCHLER GMBH & CO. KG Vorrichtung an einem Streckwerk einer Spinnereimaschine, insbesondere Strecke, Karde, Kämmmaschine o. dgl., zur Belastung der Streckwerkswalzen, mit mindestens einem Druckmittelzylinder
ITTO20110693A1 (it) * 2010-08-11 2011-10-27 Rieter Ingolstadt Gmbh Meccanismo di stiratura di una macchina tessile nonche' procedimento per il suo funzionamento
DE102011113367A1 (de) * 2011-09-15 2013-03-21 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung an einer Spinnereivorbereitungsmaschine, insbesondere Strecke, Karde, Kämmermaschine o.dgl. mit einem Streckwerk
DE102014117241A1 (de) * 2014-11-25 2016-05-25 Rieter Ingolstadt Gmbh Verfahren zum optimierten Verstrecken von zumindest einem Faserband in einer Textilmaschine sowie Textilmaschine

Also Published As

Publication number Publication date
CN112840068B (zh) 2023-04-28
EP3867427A1 (fr) 2021-08-25
DE102018125547A1 (de) 2020-04-16
WO2020078651A1 (fr) 2020-04-23
CN112840068A (zh) 2021-05-25

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