EP0476406B1 - Device for spinning a yarn with real twist by means of a spindle and a cap, and method of spinning with such a device - Google Patents
Device for spinning a yarn with real twist by means of a spindle and a cap, and method of spinning with such a device Download PDFInfo
- Publication number
- EP0476406B1 EP0476406B1 EP19910114722 EP91114722A EP0476406B1 EP 0476406 B1 EP0476406 B1 EP 0476406B1 EP 19910114722 EP19910114722 EP 19910114722 EP 91114722 A EP91114722 A EP 91114722A EP 0476406 B1 EP0476406 B1 EP 0476406B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spindle
- spinning
- speed
- bell
- cap
- 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
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/06—Spinning or twisting machines in which the product is wound-up continuously cap type
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
- D01H1/24—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles
- D01H1/244—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles each spindle driven by an electric motor
Definitions
- the invention relates to a device for spinning a real twisted yarn by means of a spindle and a bell according to the preamble of claim 1.
- An adjustable resistor and an adjustable coil can be switched on by means of a switching element, so that the torque characteristic of the individual motor of the bell can be changed slightly.
- the drives are provided in order to be able to spin particularly fine and less tensile threads with the bell spinning device. Furthermore, when spinning yarns with sufficient tensile strength, it is provided with this device to brake the bell when the spinning ends so that the thread tension does not drop too much.
- the device according to the invention has the great advantage that almost any point in the first quadrant of the coordinate system torque-speed can be reached. This applies to both the speed of the bell and the speed of the spindle. Almost any drive torque of these two speeds can thus be set. This possibility of almost any adjustability of the speeds, for example via the stator field in an asynchronous motor, allows the thread tension to be kept constant for a certain thread number within very narrow limits. By taking the stroke movement of the spindle into account, even the differences in thread tension caused by the different winding diameters of the cop can be largely compensated for. These advantages can be achieved with a suitable height measuring device and associated measuring transducer. Above all, those with a capacitive or inductive sensor have proven themselves as height measuring devices. However, digital sensors, for example with light-emitting diodes and photocells, can also be used.
- a bell spinning device is shown, with a spindle 1, which carries a cop 2.
- This cop 2 is surrounded by a bell 3 and is supplied in the known type of delivery rollers 4 with a thread with the delivery speed V, see for example EP-A 0 225 660.
- the spindle 1 is driven by a single motor 5, and the bell 3 with a single motor 6.
- the individual motors 5 and 6 are connected to frequency converters 7 and 8, each of which form a different frequency f 1 or f 2 due to a direct current signal transmitted by a programmable control unit 9, as a result of which the individual motors are driven at different speeds.
- Asynchronous motors in particular have proven themselves for this type of frequency control.
- a lifting mechanism 10 is connected to the single motor of the spindle, which ensures the stroke required for spinning.
- the respective height of the lifting mechanism 10 is measured with a height measuring device 11.
- This measuring device 11 is symbolically represented by a measuring staff 12 and a measuring transducer 13.
- inductive or capacitive displacement measurement has proven itself, as is known, for example, from the book “Dubbel - Taschenbuch für Maschinenbau", 16th edition, page V24.
- incremental encoders can be used, for example are based on light emitting diodes and photocells.
- the slip constant C depends on the TYPE of the individual motor 6 and is in the range from 1.005 to 1.025.
- the slip constant C depends on the TYPE of the individual motor 6 and is in the range from 1.005 to 1.025.
- the asynchromotor type EV 40-20 from KaVo Elektrotechnisches Werk GmbH D-7970 Leutkirch in the Allgäu with a maximum output of 100 watts, it is approximately 1.01. The smaller fluctuations can be compensated for using the prescribed height measuring device.
- the characteristic curves of the single motor shown in FIG. 2 for the bell m 1, m 2 and m 3 can be set via the parameter K, ie via the frequencies f 1 and f 2.
- the effective speed n G of the bell is given by the formula determined and is by the factor C caused by the slip lower than the speed n G 'of the stator field.
- the slip for the spindle is at most about 1 to 2% and is therefore of minor importance for the considerations made, ie n S ⁇ n S '.
- the delivery speed V depends on the thread number in tex and on the spindle speed n S.
- the load characteristics 1 1, 1 2 or 1 3 then result for a specific thread tension.
- the speed of the bell is the same for the torque characteristics and the load characteristics shown.
- the thread tension of the yarn formed can be set as desired for each yarn number.
- the DC voltage signals delivered to the frequency converters 7 and 8 are now predetermined by the programmed control unit according to a specific program.
- the lifting mechanism 10 is generally provided as a spindle bench in the type known in ring spinning machines. Using the above-described height measurement, the respective wind-up diameter d of the cop 2 can be determined, and the programmable control unit 9 can be used to largely compensate for the remaining periodic changes in the thread tension, which are caused by the lifting movement. However, the lifting mechanism 10 can also be assigned to the bells 3 of the spinning machine, the spindle 1 then remaining stationary with the spinning machine.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zum Spinnen eines echtgedrehten Garnes mittels einer Spindel und einer Glocke nach dem Oberbegriff des Anspruches 1.The invention relates to a device for spinning a real twisted yarn by means of a spindle and a bell according to the preamble of
Es ist bei Glockenspinnvorrichtungen seit längerer Zeit bekannt, dass die Aufwindung des gesponnenen Fadens mit einer periodisch ändernden Fadenspannung geschieht. Dazu hat man verschiedene neue Lösungen zur Behebung dieses Problems vorgeschlagen. Unter anderem ist aus EP-A-0 319 783 bekannt, Einzelmotoren für sowohl die Spindel als auch die Glocke zu verwenden, die je mit einer gemeinsamen Frequenzsteuereinrichtung verbunden sind. Die Drehzahl der Spindeln wird bestimmt durch den Schnittpunkt der Drehmomentkennlinie des Einzelmotors und der Lastmomentkennlinie der Spindel. Die Drehmomentkennlinie des Einzelmotors für die Glocke ist hingegen mit einer sogenannten "weichen" Drehmomentkennlinie ausgelegt, d.h. mit einer Kennlinie mit sehr viel flacherer Neigung. Der Schnittpunkt mit der Lastkennlinie der Glocke bestimmt dann die Drehzahl der Glocke. Mittels eines Schaltelementes können ein einstellbarer Widerstand und eine einstellbare Spule zugeschaltet werden, so dass die Drehmomentkennlinie des Einzelmotors der Glocke geringfügig geändert werden kann. Die Antriebe sind vorgesehen, um besonders feine und wenig zugfeste Fäden mit der Glockenspinnvorrichtung spinnen zu können. Ferner ist es beim Spinnen von Garnen mit ausreichender Reissfestigkeit vorgesehen, mit dieser Einrichtung, beim Beenden des Spinnens die Glocke abzubremsen, damit die Fadenspannung nicht zu stark abfällt.It has been known for a long time in bell spinning devices that the winding of the spun thread occurs with a periodically changing thread tension. Various new solutions to solve this problem have been proposed. Among other things, it is known from EP-A-0 319 783 to use individual motors for both the spindle and the bell, which are each connected to a common frequency control device. The speed of the spindles is determined by the intersection of the torque characteristic of the single motor and the load torque characteristic of the spindle. The torque characteristic of the single motor for the bell, however, is designed with a so-called "soft" torque characteristic, ie with a characteristic with a much flatter slope. The point of intersection with the load characteristic of the bell then determines the speed of the bell. An adjustable resistor and an adjustable coil can be switched on by means of a switching element, so that the torque characteristic of the individual motor of the bell can be changed slightly. The drives are provided in order to be able to spin particularly fine and less tensile threads with the bell spinning device. Furthermore, when spinning yarns with sufficient tensile strength, it is provided with this device to brake the bell when the spinning ends so that the thread tension does not drop too much.
Mit der obenerwähnten Vorrichtung ist zwar eine bestimmte Einstellung der Differenz zwischen Glockendrehzahl und Spindeldrehzahl möglich, jedoch lässt sich nicht jede beliebige Differenz damit einstellen. Eine gezielte Einstellung der Fadenspannung für ein beliebiges mit der Glockenspinnvorrichtung gesponnenes Garn ist daher nicht möglich.With the above-mentioned device, a certain setting of the difference between bell speed and spindle speed is possible, but not any difference can be set with it. A targeted adjustment of the thread tension for any yarn spun with the bell spinning device is therefore not possible.
Es ist nun Aufgabe der vorliegenden Erfindung, eine Vorrichtung zum Spinnen eines echtgedrehten Garnes mittels einer Spindel und einer Glocke zu bilden, die ermöglicht, die Fadenspannung in Abhängigkeit einer vorgegebenen Garnnummer in engen Grenzen konstant zu halten, auch während die Glocke beschleunigt oder abgebremst wird.It is an object of the present invention to form a device for spinning a real twisted yarn by means of a spindle and a bell, which makes it possible to keep the thread tension constant within narrow limits depending on a predetermined yarn number, even while the bell is being accelerated or decelerated.
Diese Aufgabe wird durch die Merkmale des Anspruches 1 gelöst.This object is solved by the features of
Die erfindungsgemässe Vorrichtung hat den grossen Vorteil, dass fast jeder beliebige Punkt im ersten Quadrant des Koordinatensystems Drehmoment-Drehzahl erreichbar ist. Dies gilt sowohl für die Drehzahl der Glocke als auch für die Drehzahl der Spindel. Damit ist fast jedes beliebige Antriebsmoment dieser beiden Drehzahlen einstellbar. Diese Möglichkeit der fast beliebigen Einstellbarkeit der Drehzahlen, z.B. über das Statorfeld bei einem Asynchronmotor, lässt ein Konstanthalten der Fadenspannung für eine bestimmte Garnnummer in sehr engen Grenzen zu. Durch die Berücksichtigung der Hubbewegung der Spindel können sogar die durch die verschiedenen Aufwindedurchmesser des Kopses verursachte Unterschiede in der Fadenspannung weitgehend ausgeglichen werden. Diese Vorteile lassen sich mit einem geeigneten Höhenmessgerät und zugehörigen Messwandler erzielen. Als Höhenmessgerät haben sich vor allem solche mit einem kapazitiven oder induktiven Messgeber bewährt. Es können jedoch auch digitale Messgeber z.B. mit Licht emittierenden Dioden und Photozellen angewendet werden.The device according to the invention has the great advantage that almost any point in the first quadrant of the coordinate system torque-speed can be reached. This applies to both the speed of the bell and the speed of the spindle. Almost any drive torque of these two speeds can thus be set. This possibility of almost any adjustability of the speeds, for example via the stator field in an asynchronous motor, allows the thread tension to be kept constant for a certain thread number within very narrow limits. By taking the stroke movement of the spindle into account, even the differences in thread tension caused by the different winding diameters of the cop can be largely compensated for. These advantages can be achieved with a suitable height measuring device and associated measuring transducer. Above all, those with a capacitive or inductive sensor have proven themselves as height measuring devices. However, digital sensors, for example with light-emitting diodes and photocells, can also be used.
Weitere Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung. Dort wird die Erfindung anhand eines in der Zeichnung beschriebenen Beispieles näher erläutert. Es zeigt:
- Fig. 1
- eine schematische Darstellung einer Glockenspinnvorrichtung mit zwei Einzelmotoren, und
- Fig. 2
- ein Diagramm zwischen dem Drehmoment und der Drehzahl für die Spindel und für die Glocke.
- Fig. 1
- is a schematic representation of a bell spinning device with two individual motors, and
- Fig. 2
- a diagram between the torque and the speed for the spindle and for the bell.
In Fig. 1 ist eine Glockenspinnvorrichtung dargestellt, mit einer Spindel 1, welche einen Kops 2 trägt. Dieser Kops 2 ist von einer Glocke 3 umgeben und wird in der bekannten Art von Lieferwalzen 4 mit einem Faden mit der Liefergeschwindigkeit V beliefert, siehe z.B. EP-A 0 225 660. Die Spindel 1 ist mit einem Einzelmotor 5 angetrieben, und die Glocke 3 mit einem Einzelmotor 6. Die Einzelmotoren 5 und 6 sind mit Frequenzumrichtern 7 und 8 verbunden, die je aufgrund eines von einer programmierbaren Steuereinheit 9 übermittelten Gleichstromsignals eine unterschiedliche Frequenz f₁ oder f₂ bilden, wodurch die Einzelmotoren mit unterschiedlichen Drehzahlen angetrieben werden. Für diese Art der Frequenzsteuerung haben sich vor allem Asynchronmotoren bewährt. Mit dem Einzelmotor der Spindel ist ein Hubmechanismus 10 verbunden, der für das Spinnen erforderlichen Hub sorgt. Die jeweilige Höhe des Hubmechanismus 10 wird mit einem Höhenmessgerät 11 gemessen. Symbolisch ist dieses Messgerät 11 durch eine Messlatte 12 und einen Messwandler 13 dargestellt. In der Praxis haben sich die induktive oder kapazitive Verschiebungsmessung bewährt, wie sie z.B aus dem Buch "Dubbel - Taschenbuch für Maschinenbau", 16. Auflage, Seite V24 bekannt sind. Es können jedoch Inkrementalgeber verwendet werden, die beispielsweise auf der Basis von lichtemittierenden Dioden und Photozellen ausgebildet sind.In Fig. 1, a bell spinning device is shown, with a
Die Einstellung der Fadenspannung lässt sich durch den Schlupf des Einzelmotors 6 der Glocke nun gemäss der Formel
für eine bestimmte Garnnummer genau einstellen, wobei:
- C =
- Schlupfkonstante des Einzelmotors der Glocke
- K =
- Parameter der Fadenspannung
- nG' =
- Drehzahl im Statorfeld des Einzelmotors der Glocke
- nS' =
- Drehzahl im Statorfeld des Einzelmotors der Spindel
- V =
- Liefergeschwindigkeit des Fadens
- d =
- Aufwindedurchmesser der Spule
set precisely for a specific thread number, whereby:
- C =
- Slip constant of the single bell motor
- K =
- Thread tension parameters
- n G '=
- Speed in the stator field of the single motor of the bell
- n S '=
- Speed in the stator field of the single motor of the spindle
- V =
- Thread delivery speed
- d =
- Winding diameter of the coil
Die Schlupfkonstante C ist abhängig vom TYP des Einzelmotors 6 und liegt im Bereich von 1,005 bis 1,025. Sie beträgt beispielsweise für den Asynchromotor vom Typ EV 40-20 der Firma KaVo Elektrotechnisches Werk GmbH, D-7970 Leutkirch im Allgäu mit einer maximalen Leistung von 100 Watt etwa 1.01. Die geringeren Schwankungen können dabei mittels des vorgeschriebenen Höhenmessgerätes ausgeglichen werden.The slip constant C depends on the TYPE of the
Die in Fig. 2 dargestellten Kennlinien des Einzelmotors für die Glocke m₁, m₂ und m₃ lassen sich über den Parameter K, d.h. über die Frequenzen f₁ und f₂, einstellen. Die effektive Drehzahl nG der Glocke wird durch die Formel
bestimmt und ist um den durch den Schlupf verursachten Faktor C geringer als die Drehzahl nG' des Statorfeldes. Der Schlupf für die Spindel beträgt höchstens etwa 1 bis 2% und ist deshalb für die gemachten Ueberlegungen von untergeordneter Bedeutung, d.h. nS ≈ nS'. Die Liefergeschwindigkeit V hängt von der Garnnummer in tex und von der Spindeldrehzahl nS ab. Für eine bestimmte Fadenspannung ergeben sich dann die Lastkennlinien 1₁, 1₂ oder 1₃. Die Drehzahl der Glocke ist für die dargestellten Drehmomentkennlinien und die dargestellten Lastkennlinien jeweils gleich. Da der Schlupf des als Asynchronmotor ausgebildeten Einzelmotors sich nach den obigen Gesetzmässigkeiten verändert, lässt sich die Fadenspannung des gebildeten Garns für jede Garnnummer beliebig einstellen. Die an die Frequenzumrichter 7 und 8 abgegebene Gleichspannungssignale sind nun nach einem bestimmten Programm von der programmierten Steuereinheit vorbestimmt.The characteristic curves of the single motor shown in FIG. 2 for the
determined and is by the factor C caused by the slip lower than the speed n G 'of the stator field. The slip for the spindle is at most about 1 to 2% and is therefore of minor importance for the considerations made, ie n S ≈ n S '. The delivery speed V depends on the thread number in tex and on the spindle speed n S. The
Ferner ist der Hubmechanismus 10 in der Regel als Spindelbank in der bei Ringspinnmaschinen bekannten Art vorgesehen. Mittels der vorbeschriebenen Höhenmessung lässt sich der jeweilige Aufwindedurchmesser d des Kopses 2 ermitteln, und anhand davon lassen sich mit der programmierbaren Steuereinheit 9 die noch verbleibenden periodischen Aenderungen der Fadenspannung, welche durch die Hubbewegung verursacht werden, weitgehend ausgleichen. Der Hubmechanismus 10 kann jedoch auch den Glocken 3 der Spinnmaschine zugeordnet sein, wobei dann die Spindel 1 ortsfest mit der Spinnmaschine bleiben.Furthermore, the
Obwohl die Asynchronmotoren sich für die beschriebene Vorrichtung besonders eignen, können auch andere frequenzgesteuerte Motoren wie Synchronmotoren verwendet werden, wobei in diesem Fall kein Schlupf vorhanden ist (C = 1).Although the asynchronous motors are particularly suitable for the device described, other frequency-controlled motors such as synchronous motors can also be used, in which case there is no slip (C = 1).
Claims (5)
- An apparatus for spinning a real-twisted yarn by means of a spindle (1) and a cap (3), which are each driven by a single motor (5, 6) and are controllable in their speed via a voltage frequency, characterized in that a frequency converter (7, 8) is allocated both to the single motor (5) of the spindle and the single motor (6) of the cap, and that the two frequency converters (7, 8) are connected to a joint programmable control unit (9), so that the speed of the spindle (1) and the speed of the cap (3) can be set independent from one another and in any random function of time so as to set the desired yarn tension.
- An apparatus as claimed in claim 1, characterized in that the single motors are asynchronous motors and that the slip constant C is between 1.005 and 1.025, preferably around 1.01.
- An apparatus as claimed in claim 1 or 2, characterized in that the spindle (1) is provided with a height measuring device (11) which records the traverse of the spindle (1) and supplies via a transducer (13) a signal to the joint control unit (9), through which the speed of the single motor (8) is controllable depending on the height of stroke of the lifting mechanism (10).
- An apparatus as claimed in claim 3, characterized in that the height measuring device (11) is provided with an inductive or capacitative encoder.
- An apparatus as claimed in claim 3, characterized in that the height measuring device (11) is provided with an incremental encoder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH3021/90 | 1990-09-18 | ||
| CH302190A CH681988A5 (en) | 1990-09-18 | 1990-09-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0476406A1 EP0476406A1 (en) | 1992-03-25 |
| EP0476406B1 true EP0476406B1 (en) | 1995-01-04 |
Family
ID=4246856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19910114722 Expired - Lifetime EP0476406B1 (en) | 1990-09-18 | 1991-09-02 | Device for spinning a yarn with real twist by means of a spindle and a cap, and method of spinning with such a device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0476406B1 (en) |
| JP (1) | JPH04245930A (en) |
| CH (1) | CH681988A5 (en) |
| DE (1) | DE59104135D1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ278771B6 (en) * | 1991-01-24 | 1994-06-15 | Vyzk Ustav Bavlnarsky A S | Apparatus for continuous spinning of textile yarns |
| DE19881915D2 (en) * | 1997-12-15 | 2001-01-18 | Temco Textilmaschkomponent | Single motor textile machine component with converter |
| DE102005035259A1 (en) * | 2004-07-29 | 2006-03-23 | Maschinenfabrik Rieter Ag | Drive method of textile machine, involves using hopper and spindle motors whose torque/rotation speed characteristic curve are mutually parallel in work area of both motors with respect to rotation speed difference and torque difference |
| CH697668B1 (en) * | 2004-09-23 | 2009-01-15 | Rieter Ag Maschf | Spindle with shielding. |
| DE102005057013A1 (en) * | 2005-11-30 | 2007-05-31 | Maschinenfabrik Rieter Ag | Textile machine comprises spindle drive motors and balloon restrictor drive motors each connected to a common frequency converter |
| DE102008022672A1 (en) | 2008-05-07 | 2009-11-12 | Maschinenfabrik Rieter Ag | Spinning machine i.e. hopper spinning machine, controlling method for manufacturing thread, involves influencing controller of motors when detecting load change such that spinning conditions or conditions are maintained within tolerances |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USB317427I5 (en) * | 1962-01-25 | |||
| DE3741430A1 (en) * | 1987-12-08 | 1989-06-22 | Zinser Textilmaschinen Gmbh | SPIDER |
-
1990
- 1990-09-18 CH CH302190A patent/CH681988A5/de not_active IP Right Cessation
-
1991
- 1991-09-02 DE DE59104135T patent/DE59104135D1/en not_active Expired - Fee Related
- 1991-09-02 EP EP19910114722 patent/EP0476406B1/en not_active Expired - Lifetime
- 1991-09-12 JP JP23345291A patent/JPH04245930A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CH681988A5 (en) | 1993-06-30 |
| DE59104135D1 (en) | 1995-02-16 |
| EP0476406A1 (en) | 1992-03-25 |
| JPH04245930A (en) | 1992-09-02 |
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