EP3867427A1 - Régulation de la pression dans un banc d'étirage - Google Patents

Régulation de la pression dans un banc d'étirage

Info

Publication number
EP3867427A1
EP3867427A1 EP19772703.5A EP19772703A EP3867427A1 EP 3867427 A1 EP3867427 A1 EP 3867427A1 EP 19772703 A EP19772703 A EP 19772703A EP 3867427 A1 EP3867427 A1 EP 3867427A1
Authority
EP
European Patent Office
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.)
Pending
Application number
EP19772703.5A
Other languages
German (de)
English (en)
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 Group SE
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
Publication of EP3867427A1 publication Critical patent/EP3867427A1/fr
Pending 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 by means of a preferably elastic friction cover or lining, for example on the top rollers.
  • fiber material is passed between the associated pairings of rollers. The contact pressure leads to the fiber material being held firmly in relation to the downstream arrangement of the lower roller and upper roller (s), as a result of which 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 in which the rollers are freely rotatable increases. These have to be designed accordingly, which is cost-intensive.
  • the object of the invention is to counter the aforementioned disadvantages.
  • a method for regulating a pressure of drafting rollers of a textile machine.
  • the method has one cycle.
  • This cycle comprises a first step of detecting at least one operating parameter of the textile machine that influences the loading of at least one drafting unit 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 sub-process comprises a first sub-step of determining the pressure of the at least one drafting unit upper roller by means of the acquired operating parameter.
  • the pressure determined is displayed in a second sub-step of this sub-process.
  • a user is able to change the pressure on the at least one upper drafting roller, for example via a touch-sensitive screen.
  • a second subprocess is provided. This sub-process comprises a fourth sub-step of determining whether the acquired 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 in the Range reached or reached or exceeded or fell below the threshold.
  • the method also preferably 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 area or threshold value and / or a step of determining the area 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 change of lot; 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 the 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 during the day, which results in changes to the pressure roller setting. Alternatively or additionally, this cycle is carried out when a predetermined state is present.
  • Such a condition can include changing the fiber material to be drawn 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 system or the textile machine and / or load data of at least one drive motor of one of the at least one drafting device lower roller. That is, Data that can be determined simply by sensors is 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 use the pressure arms to press an associated one of the upper drafting rollers against an assigned lower drawing roller.
  • 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 has such a drafting device.
  • the pressure drive section comprises a pressure regulator, which is connected between a pneumatic drive for the at least one upper drafting roller and the pressure arm belonging to the at least one upper drafting roller.
  • a pressure regulator for example, diaphragm control valves can be used as pressure regulators.
  • 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 downstream section 100 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 depositing device 110 on the output side.
  • the can depositing device 110 comprises a can rail 111 for the full cans and a preferably driven can track 112 which moves empty cans into the actual can changer.
  • the can changer has, for example, a can slide 113.
  • An operating platform 102 is located to the side of the section 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 accommodated in a freely rotatable manner.
  • 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 fed 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 bars 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 coils.
  • 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.
  • various setting values are entered into the pressure regulator 141.
  • Via a sensor device 142 which can include, for example, the sensors shown in FIG. 2, values are input to the pressure regulator 141 which influence the setting of the pressure from the upper rollers 125-128 to the associated lower 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 the upper rollers 145-128 are generally provided with the same reference, the pressure regulators 141 are accordingly entered via the respective coupling 143.
  • each pressure regulator 141 is coupled to its own sensor device 142 via sensor lines 140, each pressure regulator 141 can individually set an optimum 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. However, it can of course also be provided that each top roller 127, 128 is assigned its own pressure regulator 141. By means of the regulation shown, 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 on at least one drafting roller 125-128 is recorded .
  • Such an operating parameter can take into account the fiber material that is to be processed, the speed of the respective drafting device lower roller 129-131 and the ratio of this speed to the speed of a lower roller 130, 131 directly upstream in the sliver transport direction.
  • the pressure of the respective drafting roller 125-128 is determined by means of the at least one detected operating parameter. If, for example, it is recognized 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 enabled to change the pressure. This makes it possible, for example, to change the automatically determined values based on empirical values. The determined values are thus a kind of suggestion and thus make it easier to operate 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 device upper roller 125-128 is adjusted in such a way that it can be assumed that the predetermined one Operating parameters reach the desired range or the threshold value analysis delivers a positive result. This method is thus an approximation of the pressure to the pressure which is necessary 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 automatically adjusts the pressure in a test run, and the associated pressure regulator 141 is preferably trained in the process, so that it adjusts itself automatically according to a conventional learning method.
  • the method steps mentioned form a cycle which can be repeated.
  • the repetition can take place at regular intervals, for example once an hour, or if a predetermined state is present.
  • This condition can be a change of direction 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 preferably carried out several times in accordance with the number of drafting rollers 125-128 to be monitored, i. H. up to four times with the drafting system 120 described. If this is related to a plurality of upper drafting rollers 127, 128 at the same time, as shown at the bottom right in FIG.
  • 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 also be included in order to avoid overloading the drive of the stretching 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 computer-implemented.
  • the invention is not restricted 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 also 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.

Landscapes

  • 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.
EP19772703.5A 2018-10-15 2019-09-18 Régulation de la pression dans un banc d'étirage Pending EP3867427A1 (fr)

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
PCT/EP2019/074976 WO2020078651A1 (fr) 2018-10-15 2019-09-18 Régulation de la pression dans un banc d'étirage

Publications (1)

Publication Number Publication Date
EP3867427A1 true EP3867427A1 (fr) 2021-08-25

Family

ID=67998472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19772703.5A Pending EP3867427A1 (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
WO2024132128A1 (fr) * 2022-12-21 2024-06-27 Trützschler Group SE Procédé de détection préventive d'un arrêt dans un système d'étirage d'un métier à filer, et système d'étirage d'un métier à filer

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
DE10140645B4 (de) * 2000-08-23 2011-11-24 Rieter Ingolstadt Gmbh Verfahren zum Betreiben eines Streckwerks sowie Streckwerk
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
WO2020078651A9 (fr) 2020-06-11
DE102018125547A1 (de) 2020-04-16
CN112840068B (zh) 2023-04-28
CN112840068A (zh) 2021-05-25
WO2020078651A1 (fr) 2020-04-23

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