EP0478734B1 - Dispositif de mesure - Google Patents

Dispositif de mesure Download PDF

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Publication number
EP0478734B1
EP0478734B1 EP91907259A EP91907259A EP0478734B1 EP 0478734 B1 EP0478734 B1 EP 0478734B1 EP 91907259 A EP91907259 A EP 91907259A EP 91907259 A EP91907259 A EP 91907259A EP 0478734 B1 EP0478734 B1 EP 0478734B1
Authority
EP
European Patent Office
Prior art keywords
roller
sliver
rollers
pair
thickness
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
EP91907259A
Other languages
German (de)
English (en)
Other versions
EP0478734A1 (fr
Inventor
Rudolf Oexler
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.)
Rieter Ingolstadt Spinnereimaschinenbau AG
Original Assignee
Rieter Ingolstadt Spinnereimaschinenbau 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 Rieter Ingolstadt Spinnereimaschinenbau AG filed Critical Rieter Ingolstadt Spinnereimaschinenbau AG
Publication of EP0478734A1 publication Critical patent/EP0478734A1/fr
Application granted granted Critical
Publication of EP0478734B1 publication Critical patent/EP0478734B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S33/00—Geometrical instruments
    • Y10S33/11—Materials

Definitions

  • the invention relates to a measuring device according to the preamble of patent claim 1.
  • the stretched sliver is scanned again for control. This is done by means of a pair of output rollers, which is arranged independently of the sensing rollers at the drafting system entrance.
  • the drawn fiber sliver is again mechanically scanned here and a target / actual value comparison is determined electronically from this mechanical scanning. If an adjustable limit deviation is exceeded, the entire machine is stopped.
  • This additional control which is completely independent of the actual regulation system, is known under the term "sliver monitor”.
  • the tolerance limit at which the machine is switched off usually has a value between 1 and 5% deviation.
  • One of the two output rollers is in turn deflectable and serves as a scanning roller.
  • the distance between the two take-off rollers changes. This distance is converted into an electrical signal by a position measuring system and fed to the monitor as a measured variable. The monitor compares the measured variable with the 0% value set at the beginning. The machine is switched off if a deviation occurs that is greater than the set limit and lasts longer than a certain delay time.
  • DE-A-34 01 466 describes a measuring arrangement for the punctual measurement of the thickness of a web material of a metal or foil web. In relation to the entire web width, the is only selectively Thickness measured.
  • the web material is deflected on a transport roller.
  • a roller which can be made of ceramic material, rests on the transport roller. In between is the web material. It is achieved that the point of contact of the measuring probe in the roll is also the measuring point.
  • the proposed solution to arrange the measuring probe in the interior of a roll is not suitable for solving the existing problem of temperature influence on sensing rollers for measuring the thickness of the textile fiber structure. Due to the friction between the fibers and the roll, a thermal energy which influences the measurement signal is produced, which also leads to an expansion of the housing and the measurement probe itself.
  • EP-A-0 192 835 describes a pair of feeler rollers for the continuous measurement of the mass (meaning the thickness) of a fiber sliver, the feeler roller movable with its axis of rotation being pressed by spring force onto the feeler roller fixed with the axis of rotation.
  • the entire fiber structure is guided between the running surfaces of the pair of sensing rollers.
  • the movable feeler roller changes its center distance according to the thickness of the fiber structure. This change in the center distance is detected without contact by a proximity switch and converted into electrical signals.
  • the aim in developing new routes is to significantly increase the delivery speed. It was found that the tolerance range of the fiber structure often has to be set larger than in the case of slowly turning lines in order to prevent the machine from being switched off independently. As a result of the high delivery speed, quality losses had to be accepted, since a larger tolerance range had to be selected.
  • the object of the present invention is now, in particular for high-speed routes, to increase the quality of the fiber structure by keeping the permissible tolerance range for the thickness of the fiber structure extremely low.
  • the object is achieved in that at least one of the rollers of the pair of rollers is made of a material with low thermal expansion.
  • the material is to be selected such that the thermal expansion of the pair of rollers during operation of the measuring device with delivery speeds of the fiber structure is 1000 m / min and more less than the predetermined tolerance range for the thickness of the fiber sliver.
  • the fiber structure can be a sliver, a sliver or a thread.
  • the invention is particularly advantageous in the case of measuring devices which have to measure high-speed fiber bundles in terms of their thickness, since this generates a particularly large amount of frictional heat.
  • Another advantage of the invention is that the setpoint and the associated tolerance range for the thickness of the fiber structure to be measured can be set before the start of the measurement and can be maintained regardless of the temperature of the rollers over the entire duration of the measurement.
  • Ceramic material has proven to be particularly advantageous for at least one of the rolls of the pair of rolls. Silicon nitride was particularly advantageous here.
  • the use of nickel alloys for the rollers has also proven itself for measuring devices which are less exposed to high temperatures or for larger tolerance ranges.
  • a drafting system is shown schematically, in which a plurality of fiber slivers 1 are stretched.
  • the slivers 1 are combined in a band funnel 2 and passed between a grooved roller 20 and a feeler roller 21.
  • the fiber slivers 1 arrive at a plurality of drafting rollers in which, as the speeds of the drafting rollers 22, 23, 24 increase, a fiber sliver 1 ′ of predetermined thickness is stretched.
  • the sliver 1 ' is guided after the delivery roller 24 through a fleece guide nozzle 25 and thereby combined.
  • the sliver 1 ' is then drawn off from a pair of take-off rolls.
  • the pair of take-off rollers consists of a take-off roller 26 and a feeler roller 27.
  • the slivers 1 fed to the drafting system do not yet have a high degree of uniformity.
  • the regulated sliver 1 has a very high level of uniformity, which deviates up to only 1% from a target value.
  • the supplied fiber slivers 1 in the pair of rollers 20, 21 are now measured for their thickness. This is done in that the grooved roller 20 is arranged on a rotatably mounted shaft, not shown.
  • the sensing roller 21, however, is rotatably mounted on a shaft such that the center distance between the axis of the grooved roller 20 and the axis of the sensing roller 21 can change.
  • Such a change occurs in that a thicker or thinner sliver 1 is passed between the grooved roller 20 and the feeler roller 21.
  • the one pressed against each other by a spring Groove roller 20 and feeler roller 21 are pressed apart to different extents.
  • This variable path can be recorded, for example, by means of a contactless path sensor and can be converted into a measuring voltage that is analogous to the path. This takes place in a signal converter 33.
  • the measurement voltage determined in this way is passed on to a control motor 31 via several units, not shown, for regulating the distance.
  • the control motor 31 acts on a planetary gear 32, which is superimposed on the drive of a main motor 30 and acts on the center roller 23.
  • the speed of the center whales 23 is increased or decreased, depending on whether a thick or thin fiber sliver has been determined between the grooved roller 20 and the sensing roller 21.
  • the speeds of the grooved roller 20 and the drafting roller 22 are changed analogously to the speed of the middle roller 23.
  • the main motor 30 operates the drafting system at a target speed which is based on a target delay set at the start of production.
  • the linking of the drive of the grooved roller 20 with the drafting roller 22, the middle roller 23 and the delivery roller 24 is shown by means of the arrows in FIG. 1.
  • the take-off roller 26 and the feeler roller 27 check whether the regulated fiber sliver 1 'is actually in the specified tolerance range with regard to the fiber sliver thickness or, analogously, the fiber sliver weight.
  • the take-off roller 26 and the feeler roller 27 are mounted. While the take-off roller 26 is rotatably mounted on a shaft in a fixed bearing, the bearing of the sensing roller 27 is movably arranged. Fluctuations in the thickness of the sliver 1 'deflect the sensing roller 27 to a greater or lesser extent. The transfer of the distance between the take-off roller 26 and the feeler roller 27 into electrical values takes place in a signal converter 33 '.
  • a non-contact displacement sensor is preferably used, which detects the distance between the rollers 26 and 27 from one another and converts them into an electrical voltage analogous to this.
  • the voltage is detected and evaluated by a Sliver monitor 24. If it exceeds a certain percentage deviation from the desired value of the sliver thickness over a predetermined period of time, it sends a signal to the main motor 30 to shut off the route. This prevents a sliver from being produced over a longer period of time that does not meet the required quality requirements. Because the line is at a standstill, the operating personnel can determine the cause of the error.
  • Both the distance between the pair of rollers 20, 21 and the distance between the pair of rollers 26, 27 are set before the stretching process begins in such a way that the signal converters 33 and 33 'have a setpoint value.
  • the center distance of the roller pairs 20, 21 and 26, 27 is such that the control for the control device and the sliver monitor 34 can interpret a change in the distance of the axes in such a way that an increase in the center distance means a greater sliver thickness and a lower center distance means a lower sliver thickness .
  • Silicon nitride has proven to be advantageous materials for the rollers 20, 21 and / or 26, 27. This ceramic material has particular advantages in terms of low expansion and high hardness and wear resistance.
  • Nickel steels have proven to be an advantageous material for the rollers 20, 21 and / or 26, 27 for lower demands on the accuracy of the regulated fiber sliver 1 'or for less high delivery speeds.
  • the sliver 1 ' is introduced into a beak funnel 28 and fed to the take-off roller 26 and the feeler roller 27.
  • the beak funnel 28 engages around the take-off roller 26 and the feeler roller 27 laterally, so that the sliver 1 'is passed in its entirety between the two rollers.
  • the take-off roller 26 and the feeler roller 27 are fastened to shafts by means of bores 262 and 272, respectively, by means of screws, not shown.
  • Centrally arranged bores 263 and 273 serve to center the take-off roller 26 or sensing roller 27 on the respective shafts.
  • the take-off roller 26 is rotatably mounted with its shaft in a bearing housing 261.
  • the bearing housing 261 is arranged stationary on the route.
  • the sensing roller 227 is rotatably supported on its shaft in the bearing housing 271.
  • the bearing housing 271 is arranged on the route in such a way that it can be deflected in a direction A. The deflection occurs against the force of a compression spring 274.
  • the compression spring 274 presses the feeler roller 27 against the take-off roller 26 and is supported on a stationary component of the route.
  • a measuring plate 275 is arranged on the housing 271. This measuring plate 275 ensures an exact reference surface for a displacement sensor 35.
  • the displacement sensor 35 detects a distance B between the displacement sensor 35 and the measuring plate 275 .
  • the displacement sensor 35 thus serves as a signal converter 33 or 33 'corresponding to FIG. 1.
  • the distance B serving as the measuring section is generally very small, ie a few tenths of a millimeter. Even the smallest changes in distance between the take-off roller and the feeler roller 27 are registered by the displacement sensor 35.
  • the use of ceramic rollers 26, 27 significantly reduces the temperature dependency of the regulating or control device.
  • the expansion of the rollers 20, 21 and / or 26/27 is less than the tolerance range of the stretched fiber sliver 1 ′ to be determined, and thus a loss of quality, is advantageously avoided due to the temperature rise during the high-speed operation of the line.
  • the width of the rollers 20, 21 and / or 26, 27 is advantageously kept small. This ensures that the sliver is passed between the roller pairs in a small width and thus causes a relatively large deflection of the roller pairs. There are already slight differences in the sliver thickness. A width of approximately 5 mm has proven to be advantageous.
  • the edges of the rollers 20, 21, 26, 27 are advantageously sharp-edged but free of burrs. As a result, fiber material cannot get caught on the edges of the rollers 20, 21, 26, 27 and lead to incorrect measurements. In addition, it is avoided that sliver is next to the rollers 20, 21, 26, 27 and thus does not contribute to the measurement.
  • the invention is not restricted to the exemplary embodiment shown.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

Dans le cas d'un dispositif pour la mesure de l'épaisseur d'un assemblage de fibres, située dans une plage de tolérances prédéterminée, comportant une paire de rouleaux à espacement variable, entre lesquels l'assemblage de fibres passe en vue de la mesure, il est prévu qu'au moins un des rouleaux de la paire de rouleaux soit fabriqué en un matériau de faible dilatation thermique, la dilatation thermique de la paire de rouleaux pendant le fonctionnement du dispositif de mesure étant inférieure à la plage de tolérances prédéterminée de l'épaisseur de l'assemblage de fibres.

Claims (4)

  1. Dispositif de mesure de l'épaisseur d'une matière composée de fibres textiles sur un banc d'étirage comportant une paire de cylindres tâteurs 20, 21; 26, 27), l'un de ces cylindres tâteurs pouvant être modifié en ce qui concerne la distance d'axe en axe, suivant l'épaisseur de la matière (1,1') composée de fibres, l'ensemble de la matière composée de fibres pouvant être guidé entre la paire de cylindres tâteurs et le cylindre tâteur (1, 1') dont la distance d'axe en axe peut être modifiée pouvant être pressé contre l'autre cylindre tâteur (26), caractérisé en ce qu'au moins un des cylindres tâteurs (20, 21; 26, 27) de la paire de cylindres tâteurs est fabriqué en une matière dont la dilatation thermique est plus faible qu'une tolerance prédéterminée de l'épaisseur de la matière (1: 1') composée de fibres, aussi lorsque le dispositif de mesure est en service avec des vitesses de livraison de la matière composée de fibres de 1000 m/min.
  2. Dispositif selon la revendication 1, caractérisé en ce qu'au moins un des cylindres tâteurs (20, 21; 26, 27) consiste en une matière céramique.
  3. Dispositif selon la revendication 1, caractérisé en ce que la matière céramique est du nitrure de silicium.
  4. Dispositif selon une ou plusieurs des revendications 1 à 3, caractérisé en ce qu'au moins un des cylindres tâteurs (20, 21; 26, 27) est fabriqué en un alliage de nickel.
EP91907259A 1990-04-19 1991-04-05 Dispositif de mesure Expired - Lifetime EP0478734B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4012551A DE4012551C1 (fr) 1990-04-19 1990-04-19
DE4012551 1990-04-19
PCT/DE1991/000293 WO1991016595A1 (fr) 1990-04-19 1991-04-05 Dispositif de mesure

Publications (2)

Publication Number Publication Date
EP0478734A1 EP0478734A1 (fr) 1992-04-08
EP0478734B1 true EP0478734B1 (fr) 1996-06-26

Family

ID=6404696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91907259A Expired - Lifetime EP0478734B1 (fr) 1990-04-19 1991-04-05 Dispositif de mesure

Country Status (5)

Country Link
US (1) US5237754A (fr)
EP (1) EP0478734B1 (fr)
JP (1) JPH05500572A (fr)
DE (2) DE4012551C1 (fr)
WO (1) WO1991016595A1 (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4404326A1 (de) * 1993-04-02 1994-10-06 Truetzschler Gmbh & Co Kg Vorrichtung zur Messung der Stärke eines Faserbandes mit einer Bandführung zum Führen der Faserbänder am Streckwerkseinlauf
DE4414972C2 (de) * 1994-04-29 2003-07-24 Rieter Ingolstadt Spinnerei Korrektur eines von einem Tastwalzenpaar zur Dicke eines textilen Faserbandes gewonnenen Meßsignals
DE4438882A1 (de) * 1994-10-31 1996-05-02 Truetzschler Gmbh & Co Kg Vorrichtung zur Messung der Stärke eines Faserverbandes an einer Strecke z. B. Regulierstrecke
DE4438885B4 (de) * 1994-10-31 2004-08-26 Trützschler GmbH & Co KG Vorrichtung zur Messung der Stärke eines Faserverbandes an einer regulierenden Strecke
DE4438884B4 (de) * 1994-10-31 2004-08-26 Trützschler GmbH & Co KG Vorrichtung zur Messung der Stärke eines Faserverbandes an einer Regulierstrecke
DE4438883A1 (de) * 1994-10-31 1996-05-02 Truetzschler Gmbh & Co Kg Vorrichtung zur Messung der Stärke eines Faserverbandes an einer Strecke, insbesondere einer regulierenden Strecke
DE19710530B4 (de) * 1997-03-14 2007-04-12 Rieter Ingolstadt Spinnereimaschinenbau Ag Vorrichtung zur Erzeugung oder Weiterverarbeitung von Faserband
GB9710636D0 (en) * 1997-05-23 1997-07-16 Bauer Eran N Novel mixture
IT1302166B1 (it) * 1997-09-17 2000-07-31 Truetzschler & Co Dispositivo su uno striratoio per la misura di una nastro di fibrecomposito formato da nastri di fibre
DE19921429B4 (de) * 1998-06-29 2017-03-02 Rieter Ingolstadt Gmbh Verfahren und Vorrichtung zur Fehlerkorrektur eines von einem Meßorgan gelieferten Meßwertes von Faserband in einer Textilmaschine
DE19950901A1 (de) 1998-11-18 2000-05-25 Truetzschler Gmbh & Co Kg Vorrichtung zum Messen der Dicke und/oder der Ungleichmäßigkeit von Faserbändern
DE10327469B4 (de) * 2002-07-06 2016-03-10 Rieter Ingolstadt Gmbh Bandquerschnittsmesseinrichtung
US7131211B2 (en) * 2003-08-18 2006-11-07 Micron Technology, Inc. Method and apparatus for measurement of thickness and warpage of substrates
DE102005023992A1 (de) 2005-05-20 2006-11-23 TRüTZSCHLER GMBH & CO. KG Vorrichtung an einer Spinnereivorbereitungsmaschine, z.B. Karde, Krempel, Strecke, Kämmmaschine o.dgl., zum Ermitteln der Masse und/oder Masseschwankungen eines Fasermaterials, z.B. mindestens ein Faserband, Faservlies o.dgl., aus Baumwolle, Chemiefasern o. dgl.
DE102005033180B4 (de) 2005-07-13 2020-03-12 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung zum Erfassen eines Parameters an mehreren, einem Streckwerk einer Spinnereimaschine zugeführten Faserbändern
DE102008040871A1 (de) * 2008-07-30 2010-02-04 Rieter Ingolstadt Gmbh Regulierstrecke mit elektrischer Bremse und Verfahren zum Umrüsten einer Regulierstrecke für wartungsarmen Betrieb
DE102008049363B4 (de) 2008-08-19 2022-10-13 Trützschler Group SE Vorrichtung für eine oder an einer Spinnereivorbereitungsmaschine, die ein Streckwerk zum Verstrecken von strangförmigem Fasermaterial aufweist
DE102008038392A1 (de) 2008-08-19 2010-02-25 TRüTZSCHLER GMBH & CO. KG Vorrichtung für eine oder an einer Spinnereivorbereitungsmaschine, die ein Streckwerk zum Verstrecken von strangförmigem Fasermaterial aufweist
US9447525B2 (en) * 2014-02-18 2016-09-20 Eastman Chemical Company On-line detection of defects in fibrous members
DE102014110665A1 (de) * 2014-07-29 2016-02-18 Rieter Ingolstadt Gmbh Messwalze und Vorrichtung zum Messen eines Faserverbandes
CN109423713A (zh) * 2017-09-05 2019-03-05 江苏新金兰纺织制衣有限责任公司 一种匀整型毛斗机
DE102022116504A1 (de) 2022-07-01 2024-01-04 Maschinenfabrik Rieter Ag Regulierstrecke, Verfahren zum Betreiben einer Regulierstrecke sowie Verfahren zum Umrüsten einer Regulierstrecke

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FR873659A (fr) * 1940-07-15 1942-07-16 Degussa Outillage de mesures, calibres, etc.
US2913828A (en) * 1958-03-04 1959-11-24 Western Electric Co Apparatus for detecting variations in the diameter of an advancing strand
US3494041A (en) * 1968-06-24 1970-02-10 Norton Co Measuring device for engaging abrasive surfaces
DE2544029A1 (de) * 1975-10-02 1977-04-14 Schubert & Salzer Maschinen Verfahren und vorrichtung zum selbsttaetigen vergleichmaessigen von vliesen, faserbaendern, vorgarnen u.dgl. durch verziehen
US4136454A (en) * 1976-05-17 1979-01-30 De La Rue Instruments Limited Apparatus for gauging the thickness of moving laminar material
US4189841A (en) * 1976-08-28 1980-02-26 Aktiengesellschaft Gebruder Loepfe Method and device for measuring the variations of the cross-sectional dimensions of a moving thread-like structure
CH626123A5 (fr) * 1978-02-02 1981-10-30 Zellweger Uster Ag
DE3401466A1 (de) * 1984-01-18 1985-07-25 Elektro-Physik Hans Nix & Dr.-Ing. E. Steingroever KG, 5000 Köln Sonde fuer die kontinuierliche messung der dicke von schichten oder baendern
EP0192835B1 (fr) * 1985-02-15 1989-04-26 Maschinenfabrik Rieter Ag Dispositif pour la détection continue de la masse d'une bande de fibres

Also Published As

Publication number Publication date
DE4012551C1 (fr) 1991-06-27
US5237754A (en) 1993-08-24
DE59107958D1 (de) 1996-08-01
JPH05500572A (ja) 1993-02-04
EP0478734A1 (fr) 1992-04-08
WO1991016595A1 (fr) 1991-10-31

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