EP0565486B1 - Rectification controlée d'une garniture de carde - Google Patents

Rectification controlée d'une garniture de carde Download PDF

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Publication number
EP0565486B1
EP0565486B1 EP93810221A EP93810221A EP0565486B1 EP 0565486 B1 EP0565486 B1 EP 0565486B1 EP 93810221 A EP93810221 A EP 93810221A EP 93810221 A EP93810221 A EP 93810221A EP 0565486 B1 EP0565486 B1 EP 0565486B1
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EP
European Patent Office
Prior art keywords
textile machine
operating
sensor
grinding
machine
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
EP93810221A
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German (de)
English (en)
Other versions
EP0565486B2 (fr
EP0565486A1 (fr
Inventor
Peter Fritzsche
Robert Demuth
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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Publication date
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
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Application granted granted Critical
Publication of EP0565486B1 publication Critical patent/EP0565486B1/fr
Publication of EP0565486B2 publication Critical patent/EP0565486B2/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/36—Driving or speed control arrangements
    • D01G15/38—Driving or speed control arrangements for use during the grinding of card clothing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/16—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding sharp-pointed workpieces, e.g. needles, pens, fish hooks, tweezers or record player styli
    • B24B19/18—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding sharp-pointed workpieces, e.g. needles, pens, fish hooks, tweezers or record player styli for grinding carding equipment, e.g. card-clothings

Definitions

  • the invention relates to a textile machine (for example a card) with a working element (for example a clothing) which has a decisive influence on the quality of the product of the machine, but whose condition deteriorates with increasing operating time (for example because of wear), which has a corresponding effect exerts the product quality.
  • the textile machine is provided with a maintenance system that can be used during machine operation to counteract the deterioration of the condition of the work element.
  • a textile machine (namely a card) of the type described above is shown in EP-A-322637. It has been suggested that the means of maintenance should be in constant use in order to constantly achieve the optimal quality. "Continuous” is to be understood in the sense that a grinding system or device is installed in the machine and is therefore always ready for operation (even while the machine is in operation) and not that grinding is carried out continuously during operation.
  • the grinding element is continuously pulled over the set at predetermined (for example temporal) intervals which are dependent on the production performance and / or quality features.
  • a grindstone can be moved to an end position (Fig. 3 or Fig. 7) that lies outside the working width of the card (the axial length of the clothing). The arrival of the grindstone in this end position is reported to a controller by a sensor.
  • EP-A-497736 can either be in operation, i.e. during carding or after the card has run out.
  • the waiting times between grinding periods must be determined empirically.
  • EP-A-004186 describes a grinder that can be attached to a card when it is necessary to grind a roller of the machine.
  • the device comprises a carrier and a unit which can be moved back and forth on the carrier. The document deals on the one hand with the attachment of the device to the card and on the other hand with a construction of the unit, which favors the replacement of the grinding element.
  • the aim of this invention is to make the use of systems according to EP-A-322637 more flexible, so that the capabilities of the system can be adapted to the requirements of use.
  • FIG. 1 merely shows the surface 12 of the reel 10.
  • a set (not shown) is fitted onto this surface 12, which is equipped with teeth and thus has a predetermined tip density (number of tips per unit area). This is indicated for only part 14 of the drum surface - but the drum is equipped with tips over its entire working width AB.
  • the drum rotates about its axis (not shown), which means a movement of the teeth in the direction of arrow P.
  • the grindstone 16 according to EP-A-497 736 is shown in its end position L.
  • the aforementioned sensor is shown at 18.
  • a drive motor 20 and a drive transmission means (not shown, for example a belt, the rail of a linear motor, a threaded spindle, etc.) and a holder (not shown) for the stone 16
  • the stone 16 can move in a direction perpendicular to the direction of movement P via the entire working width AB can be moved.
  • the drum continues to rotate.
  • the dimension of the grindstone in its own direction of movement and its speed of movement can be selected in comparison to the speed of movement of the clothing teeth in the direction P that during a lifting movement of the whetstone from one side to the other of the drum each tooth of the clothing comes into contact with the whetstone a few times (eg 4 to 8 times).
  • a single stroke movement (from one side of the reel to the other) is sufficient to "grind” all teeth, ie to exert a certain grinding effect. If this grinding effect is considered sufficient for certain purposes (as will be described later), a second layer L2 can be provided on the side of the reel from the end position L, where the grindstone 16 can remain without touching the clothing ( Waiting point).
  • the operating phase begins and ends in the end position (waiting point) - it accordingly contains a predetermined number (at least one) of a lifting movement from side to side of the working width.
  • the duration of the operating phase depends on the number of strokes and the speed of the grinding stone.
  • the duration of the standby phase is determined according to criteria that are described below.
  • FIG. 2 shows schematically the drum 10, Briseur 22, pickup 24 and the grinding system, which is indicated as a whole with the reference numeral 26.
  • the system 26 comprises the grindstone 16 (FIG. 1), its holder (not shown), the drive motor 20 (FIG. 1) and the guide means (not shown) which guides the grindstone holder during a lifting movement.
  • FIG. 2 also shows the drive motor 30 for the card, which sets the reel 10 in rotation, for example via a toothed belt 32, when the card is in operation.
  • the motor 30 is controlled by signals from a card control 34 and reports its status back to this control 34.
  • the card controller 34 also controls the grinding system 26, the grinding system being assumed in the example shown be provided with its own "sub-controller" 36, which carries out certain control functions autonomously on the basis of control commands from the main controller 34.
  • the main controller 34 is provided with a display 38 and a keyboard 40 for human-machine communication.
  • This controller 34 also includes a time signal generator, which is indicated schematically at 42.
  • each operating phase must of course include a certain number of double strokes (back and forth movements) from the end position.
  • FIG. 3 is a timing diagram and is used to explain the duration of the standby phase. This diagram is not to be understood as a realistic representation of reality but as a purely fictitious diagram to explain principles.
  • Fig. 3 the time is plotted on the horizontal axis and the tooth wear on the vertical axis.
  • the "curve” K1 represents the increasing tooth wear during a period T1 of uninterrupted operation with a predetermined drum speed and a certain processed material.
  • the “wear” is to be understood here as tooth wear, which leads to an impairment of the functionality of the tooth as a carding element. This is explained in more detail below with reference to FIG. 4. Under other operating conditions (drum speed, processed material) the wear is slower (e.g. after curve K2) or even faster (not shown), which leads to a steeper curve.
  • the operating time t (without using the grinding system) is the same as the standby period of the grinding system 26. During this period, the grindstone waits in its end position or is ready for use in this end position.
  • the period of time t can be entered by the operator into the controller 34 via the keyboard 40 (and can be called up again for checking purposes via the display 38).
  • the "optimal" conditions can first be determined by test settings and the determined values can then be firmly entered for normal operation.
  • the duration of this waiting period will often prove to be a function of the total operating time of the set.
  • This can be taken into account by the controller 34 by means of an operating hours counter (not shown) and messages from both the motor 30 and the time signal generator 42.
  • the motor 30 (which drives the drum) is only shown as an example as a source for the signals which drive the operating hours counter. Such signals could be taken from the customer drive and would have a closer relationship to material flow.
  • the correct function of the operating time and a start signal after re-garnishing must be entered by the operator, after which the controller 34 is able to determine the correct times for the use of the grinding system.
  • the controller 34 sends a start signal to the sub-controller 36 in order to trigger the use of the grinding system. The subsequent use will now be explained with reference to FIG. 4.
  • Fig. 4 shows diagrammatically two teeth 50, 52 of a set and the direction of movement P (see also Fig. 4).
  • the work of the tooth is performed at the top S and the wear at this point is decisive for the product quality.
  • Carding technology product quality depends on the sharpness of the tip on the leading edge of each tooth 50, 52, etc.
  • the tooth height is reduced in order to restore a sharp tip S1, S2 etc. on the front edge with every grinding operation. This can continue to a very low tooth height e.g. to the tip Sn (Fig.4), where the tip is in the transition to the next tooth.
  • the duration of the grinding operation or the work required for this depends on the tooth height, ie on the tooth cross-sectional area that has to be processed during grinding. This area is a function of the length 11, 12, 13 ..ln etc. (Fig.4), which increases with each grinding operation. As previously indicated, each grinding of a given set results in a subsequent operating period without grinding, the duration of this period decreasing with the number of grinding operations carried out. With "classic" grinding (without built-in grinding system) it is therefore worthwhile usually no longer work long before the tooth height has been reduced to the theoretical minimum.
  • an increase in the amount of labor required to perform a sequence of grinding operations can be realized by a corresponding increase in the number of strokes per grinding operation (and still without interrupting production).
  • the system only reaches its limit where it has to be continuously driven in operation with minimum operating speed (and / or with maximum adjustable contact pressure).
  • the number of stroke movements per operating phase and the change with the total operating time of a given set can also be entered by the operator via the keyboard 40.
  • the number of movements per grinding operation is then forwarded from the controller 34 to the controller 36 as a control command.
  • the drum 10 can be ground at full production speed. However, it may be necessary to change the drum speed for grinding compared to the production speed, e.g. to reduce. This can be effected by the controller 34 by means of a suitable control command to the motor 30.
  • the motor 30 (or its "local” control) is designed such that it with discrete, predetermined Speeds works, can be switched from (or a) production speed to a "grinding speed". If the speed of the motor 30 (for example by means of a frequency converter) can be continuously adjusted within predetermined limits, the controller 34 determines an output frequency of the converter, which results in a suitable grinding speed of the reel.
  • a predetermined time delay must be inserted by the controller 34 between the "switching" of the motor 30 and the use of the grinding system 26. If the speed of the motor 30 is monitored and the control 34 is reported, the control 34 can be programmed such that it only controls the use of the grinding system when the grinding speed of the motor 30 is reached.
  • Fig. 5 shows a modified arrangement that can work as a self-adjusting machine. Since the machine itself (including its built-in grinding system) has not been changed compared to FIG. 2, the machine parts and the system 26 (with its "local" control 36) are indicated with the same reference symbols in both figures. 5 is a sensor (or a sensor arrangement) 54 which (or which) checks the product 56 of the card 40. The (or each) sensor 54 responds to a quality parameter that depends on the condition of the clothing 12 (FIG. 1), for example on the number of nits.
  • a nit sensor for use in the exit of a card is known, for example, from DOS 3928279 or CH 669401 (or US 4953265).
  • the quality sensor could face the drum or the customer i.e. Check the quality of the product directly on the rotating machine element (e.g. number of nits).
  • a brightness sensor could, for example, be worn by the drum carrier to measure the brightness of the continuous clothing surface, which brightness changes with tooth wear.
  • a distance sensor that responds to the distance to the teeth could serve a similar purpose.
  • the output signal of the sensor (or the sensor arrangement) 54 is supplied to the card controller 34A.
  • This control differs from the control 34 (FIG. 2) only in the control program, which is tailored to the application in combination with the quality sensor or tooth condition sensor.
  • time is again drawn on the horizontal axis, but this time the number of nits as an example of a quality parameter on the vertical axis.
  • the number of nits Ao (Fig. 6) represents a lower limit that can be achieved with a new set in optimal condition. After the new start of material processing (currently to) with this new set, the number of nits increases as the set condition deteriorates due to wear of the teeth.
  • the number of nits Ag represents for the user (for the spinning mill) represents a limit that must not be exceeded without intervention.
  • the current number of nits (the actual value) is reported by the sensor (or the sensor arrangement) 54 to the controller 34A. As long as the actual value lies below the limit value Ag, the grindstone 16 (FIG. 1) of the system 26 remains in the waiting position (standby phase). At time t1, however, the sensor 54 reports that the limit value Ag has been reached and the control system accordingly triggers an operating phase of the system 26 (control command to the local control system 36).
  • the tooth condition remains impaired, so that the product quality (number of nits) can no longer be reduced to the optimal lower limit value Ao.
  • the number of nits can be improved at best by grinding to the value Am, and this with a steadily increasing tendency of this lower limit value.
  • the standby intervals (carding without grinding) are shortened accordingly.
  • the lower limit for the number of nits approaches a value An, where it is no longer worth grinding repeatedly.
  • the controller 34A then outputs an alarm, for example via the display 38 (FIG. 2), so that when there is a suitable Opportunity to re-garnish the drum.
  • the invention is not restricted to use on the drum set. It is also not limited to an arrangement according to which the grindstone is moved from side to side of the working width.
  • Fig. 3 of the aforementioned EP 322637 shows an arrangement according to which the abrasive extends over the entire working width. The arrangement is particularly advantageous for grinding cover sets (flexible sets).
  • Such a system can also be controlled according to the present invention in that the abrasive has a radial distance from the clothing in the ready position. A means of movement can then be provided to move the abrasive in the radial direction from the ready position to the operating point (in contact with the clothing).
  • grindstone in this context means a grinding element which is suitable for grinding a set, regardless of the material from which the element is made (e.g. ceramic or sintered metal).
  • the speed of movement of the element is kept constant, although this speed can be changed over time (with increasing operating hours since the last grinding operation) or can be adjustable.
  • the operating speed can also be changed as a function of the distance to or from a waiting point, e.g. so that the speed reaches a maximum value in the middle between two waiting positions.
  • FIG. 7 schematically shows a single tooth 60 and the grindstone 62.
  • the arrow 64 shows the direction of rotation of the reel or tooth 60 during production. Grinding during further production inevitably leads to "grinding against the tooth", i.e. the leading edge of the tooth hits the grindstone first.
  • a built-in system according to this invention can also be used for "grinding with the tooth” - but this must be in the normal direction of rotation (64) moving drum initially brought to a standstill and then driven in the opposite direction (66) at a predetermined speed. In this case, production must be stopped.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (17)

  1. Machine textile, avec un élément de travail qui influence, d'une manière déterminante, au moins un paramètre de qualité du produit de cette machine, et où l'état de l'élément se détériore avec l'augmentation du temps de fonctionnement, et la qualité du produit subit une influence néfaste en correspondance, et avec un élément de maintenance (16) encastré qui améliore l'état de cet élément de travail par traitement de celui-ci, de manière à agir contre l'influence néfaste sur la qualité du produit,
    caractérisée par le fait que
    l'élément de maintenance (16) est mobile entre un poste d'attente (L2) et une position de fonctionnement, et qu'un asservissement (34; 34A) est prévu qui, en fonction de paramètres pouvant être prédéterminés, commande respectivement déclenche le mouvement de l'élément de maintenance depuis le poste d'attente dans la position de fonctionnement, et inversement.
  2. Machine textile selon revendication 1,
    caractérisée par le fait que
    l'asservissement (34; 34A) est pourvu d'un programme qui provoque le mouvement de l'élément de maintenance (16) dans la position de fonctionnement, respectivement le mouvement de recule dans le poste d'attente, selon un cycle de travail prédéterminé par le programme.
  3. Machine textile selon revendication 2,
    caractérisée par le fait que
    le cycle de travail comprend un intervalle de temps prédéterminé (t) compris entre des mises en fonctionnement successives.
  4. Machine textile selon revendication 3,
    caractérisée par le fait que
    l'intervalle de temps (t) est réglable.
  5. Machine textile selon l'une des revendications précédentes,
    caractérisée par le fait
    qu'un détecteur (54) est présent qui répond au paramètre de qualité cité, et produit un signal de sortie correspondant.
  6. Machine textile selon une des revendications 1 à 5,
    caractérisée par le fait
    qu'un détecteur est présent qui répond à l'état de l'élément de travail, et produit un signal de sortie correspondant.
  7. Machine textile selon revendication 5 ou 6,
    caractérisée par le fait que
    le signal de sortie du détecteur (54) est livré à l'asservissement (34A), et le mouvement de l'élément de maintenance (16), depuis le poste d'attente jusque dans la position de fonctionnement, est déclenché en fonction du signal de sortie du détecteur.
  8. Machine textile selon revendication 7,
    caractérisée par le fait que
    le niveau de signal (Ag) qui déclenche ledit mouvement, est réglable.
  9. Machine textile selon l'une des revendications précédentes,
    caractérisée par le fait que
    l'élément de travail s'étend sur une largeur de travail (AB) déterminée, que l'élément de maintenance (16) ne s'étend que sur une partie de cette largeur de travail, et qu'une mise en fonctionnement de l'élément de maintenance comprend au moins un mouvement de course sur toute la largeur de travail.
  10. Machine textile selon revendication 9,
    caractérisée par le fait que
    la vitesse du mouvement de course est réglable.
  11. Machine textile selon revendication 9 ou 10,
    caractérisée par le fait que
    l'asservissement (34; 34A) est pourvu d'un programme qui détermine le nombre des mouvements de course sur toute la largeur de travail, lors de chaque mise en fonctionnement.
  12. Machine textile selon revendication 11,
    caractérisée par le fait que
    le nombre des mouvements de course par mise en fonctionnement est réglable.
  13. Machine textile selon revendications 12,
    caractérisée par le fait que
    le nombre des mouvements de course par mise en fonctionnement est ajusté par l'asservissement (34; 34A), en fonction du temps de fonctionnement de l'élément de travail.
  14. Machine textile selon revendication 12, revendication 4, et revendication 5 ou 6,
    caractérisée par le fait que
    le nombre des mouvements de course par mise en fonctionnement est commandé en fonction de la durée de l'intervalle de temps compris entre des mises en fonctionnement successives.
  15. Machine textile selon l'une des revendications précédentes,
    caractérisée par le fait
    la machine comprend un rouleau (10) pourvu d'une garniture, que l'élément de travail est la garniture, et que l'élément de maintenance (16) est un moyen d'aiguisage pour la garniture.
  16. Machine textile selon revendication 15 et revendication 5,
    caractérisée par le fait que
    la machine est une carde, et le détecteur (54) est un détecteur de boutons.
  17. Machine textile selon revendication 15 et revendication 5,
    caractérisée par le fait que
    la machine est une carde, et le détecteur (54) est un détecteur de régularité.
EP93810221A 1992-04-07 1993-03-26 Rectification controlée d'une garniture de carde Expired - Lifetime EP0565486B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1136/92 1992-04-07
CH113692 1992-04-07

Publications (3)

Publication Number Publication Date
EP0565486A1 EP0565486A1 (fr) 1993-10-13
EP0565486B1 true EP0565486B1 (fr) 1996-12-18
EP0565486B2 EP0565486B2 (fr) 2011-07-13

Family

ID=4203332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810221A Expired - Lifetime EP0565486B2 (fr) 1992-04-07 1993-03-26 Rectification controlée d'une garniture de carde

Country Status (4)

Country Link
US (1) US5355560A (fr)
EP (1) EP0565486B2 (fr)
JP (1) JPH0610216A (fr)
DE (1) DE59304779D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101268220B (zh) * 2005-09-22 2011-02-09 里特机械公司 用于打磨装置的方法

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US3263344A (en) * 1963-07-31 1966-08-02 Stickle Steam Specialties Co I Drying system for paper-making machinery and the like
US5625924A (en) * 1994-07-29 1997-05-06 Maschinenfabrik Rieter Ag Method for producing a card sliver and carding machine therefor
DE19514039B4 (de) * 1995-04-13 2006-01-19 Trützschler GmbH & Co KG Vorrichtung an einer Spinnereivorbereitungsmaschine, z. B. Karde, Krempel o. dgl.
DE59710155D1 (de) * 1996-04-12 2003-07-03 Rieter Ag Maschf Sensor für den Kardierspalt bzw. Nachstellen des Kardierspaltes
US6129614A (en) * 1996-04-12 2000-10-10 Maschinenfabrik Rieter Ag Apparatus for grinding clothing of a textile machine
EP0866153B2 (fr) 1997-02-24 2004-11-24 Maschinenfabrik Rieter Ag Machine de cardage à haute rendement
EP1329288B1 (fr) 1997-10-01 2005-07-06 Maschinenfabrik Rieter Ag Meulage de garnitures
CH693095A5 (de) * 1997-12-13 2003-02-28 Truetzschler Gmbh & Co Kg Vorrichtung an einer Karde zum Schärfen der Garnitur der Trommel.
DE59903892D1 (de) * 1998-05-14 2003-02-06 Rieter Ag Maschf Schleifen von Arbeitselementen einer Karde
WO2000013850A1 (fr) 1998-09-09 2000-03-16 Maschinenfabrik Rieter Ag Affutage des garnitures
DE10258789A1 (de) * 2002-12-16 2004-07-08 Graf + Cie Ag Vorrichtung und Verfahren zum Bearbeiten von Faserverarbeitungsgarnituren
DE102004060663A1 (de) * 2004-12-15 2006-07-06 Trützschler GmbH & Co KG Vorrichtung an einer Spinnereimaschine, insbesondere Karde, Krempel, Reiniger o. dgl., zum Bearbeiten, insbesondere Schleifen und/oder Schärfen einer Faserverarbeitungsgarnitur

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FR1180404A (fr) * 1957-01-22 1959-06-04 F O R Perfectionnements apportés aux rectifieuses pour cylindres de machines textiles, en particulier pour cardes garnies de bandes sans fin
EP0004186B1 (fr) 1978-03-08 1981-09-23 The English Card Clothing Company Limited. Accessoire d'entretien pour une carde
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FR2607631B1 (fr) * 1986-11-28 1989-02-17 Thomson Cgr Sonde pour appareil a ultrasons munie d'un arrangement concave d'elements piezo-electriques
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DE59201860D1 (de) 1991-01-29 1995-05-18 Rieter Ag Maschf Vorrichtung zum Schleifen von Garnituren beispielsweise einer Karden- oder Reinigungstrommel.
US5259092A (en) * 1992-10-13 1993-11-09 John D. Hollingsworth On Wheels, Inc. Method and apparatus for cleaning carding flats

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101268220B (zh) * 2005-09-22 2011-02-09 里特机械公司 用于打磨装置的方法

Also Published As

Publication number Publication date
JPH0610216A (ja) 1994-01-18
EP0565486B2 (fr) 2011-07-13
US5355560A (en) 1994-10-18
EP0565486A1 (fr) 1993-10-13
DE59304779D1 (de) 1997-01-30

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