EP0922797A2 - Method and device for operating an open-end spinning machine - Google Patents

Abstract

The mobile maintenance unit (10), to service a number of spinning stations at an open-end spinning machine, has a sensor (41) linked to a control (18) to check the identification mark at the spinning rotor (15). A yarn splicing operation can only start when the identification mark indicates that the spinning rotor (15) has been recognized and the operating units are in a correct alignment. The data carried by the identification mark is compared with stored data (45) at the service unit (10) control (18). The mark can be a machine readable barcode. The sensor (41) is at the cleaning head (16) of the service unit (10).

Description

The invention relates to a method for operating a Open-end spinning machine according to the preamble of claim 1 or a device for performing the Procedure (claim 3).

It's been a long time with open-end rotor spinning devices known, the spinning rotor with its rotor shaft in the bearing gusset to store a support disc bearing, since such bearings very much enable high speeds and a long service life exhibit.

In such support disc bearings, the axes are the Support roller pairs usually somewhat with respect to the rotor axis arranged so that the rotor shaft during the Operation is acted upon by an axial force component. This axial force component holds the rotor shaft securely System on a mechanical shaft arranged on the rotor shaft end Thrust bearing.

Although the above, for example in the Rotor bearing described in DE 25 14 734 C2 in practice has proven itself and is used in large numbers, also shows this type of rotor bearing has some disadvantages.

Due to the limited arrangement of the pairs of support disks not just the spinning rotor to a structurally predetermined Direction of rotation limited, the restricted arrangement of the Support disc pairs also leads to increased friction in the Area support discs / rotor shaft with the result that it too heating of the treads of the support disks. This frictional heat does not only cover the Support discs heavily loaded; to overcome this friction additional energy is also necessary.

Furthermore, with this type of bearing of the rotor shaft, the mechanical axial bearing arranged on the rotor shaft end is very heavily stressed, which has a negative effect on the service life of this bearing.
By installing a wear-resistant ceramic pin in the rotor shaft end (DE 41 17 174 A1), the wear resistance of such axial bearings could be significantly improved, but it is still necessary to lubricate these bearings regularly and adequately. In spinning mills, however, such oil-lubricated bearings are not without problems because of possible leakages or the almost inevitable creep oil flows.

The post-published DE 197 29 191.0 discloses a rotor bearing arrangement that avoids the disadvantages described above. In this mounting, the spinning rotor with its rotor shaft is also mounted in the bearing gusset of a support disk bearing, but the axes of the two pairs of support disks are not set in a parallel manner, but are arranged parallel to the rotor shaft. This means that no or hardly any axial forces act on the rotor shaft of the spinning rotor during operation. The spinning rotor is axially positioned in the bearing gusset of the support disk bearing via a magnetic bearing arranged on the rotor shaft end, which has radially arranged magnetic bearing components. The special design of this magnetic bearing ensures that the spinning rotor remains securely positioned even at speeds> 100,000 min ^-1 .

Although the support disc bearing according to DE 197 29 191.0 has undeniable advantages due to its lower energy requirement and its longer service life compared to support disc bearings with set support disc pairs and mechanical axial bearings, it can be used when using these support disc bearings, particularly in spinning mills, in which both open-end spinning devices with mechanical axial bearings and OE spinning devices with magnetic rotor positioning are running, problems arise.
This means that the inadvertent installation of a rotor, which is designed for a mechanical thrust bearing, in an axial-thrust-free open-end spinning device with magnetic positioning of the spinning rotor, can cause considerable damage to the spinning device in question due to the missing axial fixation of the spinning rotor.
Such a spinning rotor installed in a wrong spinning device and thus not fixed in the axial direction also represents an accident risk, not least because of its high operating speed.

Since a sufficient and secure fixation of the rotor shaft in Bearing gusset of the support disc bearing, especially in the occurring high speeds is only guaranteed if the bearing components involved, that is, those at the Spinning device arranged stationary, the permanent magnets bearing component and that with the rotor shaft circumferential bearing components are precisely coordinated, Even small deviations in the bearing components can occur cause significant damage.

Starting from the aforementioned prior art, the The invention is therefore based on the object of a method or to develop a device that the one safe operation of open-end spinning devices with Axial thrust-free support disc bearing guaranteed.

According to the invention, this object is achieved by a method as described in claim 1, or by a device according to claim 3.

Advantageous embodiments of the invention are the subject of Subclaim 2 and subclaims 4 to 7.

The method according to the invention ensures that only suitably designed spinning rotors can be operated in an open-end spinning device which has an axial thrust-free support disk bearing and is designed for magnetic positioning of the spinning rotor.
This means that the method according to the invention reliably prevents a spinning rotor which is designed for an open-end spinning device with set pairs of support disks and mechanical axial bearings or which uses a spinning rotor of the rotating bearing component which does not meet the requirements, from being inadvertently used in such spinning devices.
In terms of the installation dimensions of the spinning rotors, it may indeed be possible to insert such a wrong spinning rotor in the spinning device, however, due to the sensor device connected to the control device of the operating unit, such a spinning rotor is immediately recognized due to the missing identification marking and is rated as being of safety-related concern.
In such a case, the control device of the operating unit immediately stops the piecing process.

In a preferred embodiment, as set out in claim 2, an information carrier is used as the identification mark, which can contain a large number of data, for example the type, size, year of manufacture etc. of the spinning rotor. These data that can be detected by the sensor device of the operating unit are compared and evaluated in the control unit of the operating unit with predetermined data stored in an associated storage unit. The comparison of the data not only detects spinning rotors which are questionable in terms of safety technology, such a comparison can also be used to ensure, for example in connection with a batch change, that the spinning rotors that are correct for the respective yarn batch are always used.
That is to say, on the basis of missing or incorrect data on the information carrier, a spinning rotor can, if appropriate, be immediately recognized as a spinning means that is questionable in terms of safety or incorrect in terms of spinning technology, which, as already mentioned above, leads to an instantaneous shutdown of the spinning station in question.

As stated in claim 3, the spinning rotor has preferably in the area of his spinning cup, via a Identification mark that clearly identifies it as magnetic positionable, constructive exactly on the stationary Magnetic bearing component identifies coordinated spinning rotor. This identification mark is made by a Sensor device on the control unit, for example on The cleaning head of the control unit is arranged (Claim 4), detected and decrypted in the associated control device. That is, in the control device of the control unit a comparison of those stored in a storage device Spinning rotor data with the data of the identification mark performed. Only if this data matches does one find Piecing attempt instead. Unidentifiable, missing or incorrect data automatically leads to an immediate one Stop the spinning station in question.

In claim 5 it is stated that as Identification device preferably an electronic one Information carrier is used. The electronic Information carriers can contain a large amount of data, for example about the type of spinning rotor, its size, its coating, its year of construction, etc.

scharf" gemacht und dann gelesen werden kann.In a preferred embodiment, as set out in claim 6, the electronic information carrier is designed as a so-called transponder.
Such a transponder is a commercially available, per se passive electronic chip, which, if necessary, is provided via a transmitting and receiving device arranged on the operating unit

armed "and then read.

An alternative embodiment of an information carrier represents a barcode (Claim 7). In this case it is Sensor device on the control unit designed as a scanner.

In a further embodiment of the invention, it is also possible to arrange an identification mark on the spinning rotor which can be detected inductively by the sensor device.
Regardless of the type of information carrier arranged on the spinning rotor, it is ensured in any case that a wrong spinning rotor, that is to say a spinning rotor which could lead to the spinning machine or operating personnel being driven, is immediately recognized by the sensor device, with the result that the relevant one Spinning device is stopped.

Further details of the invention are below based on the drawings embodiment shown removable.

Fig. 1:

im Kalbschnitt schematisch eine Seitenansicht einer Arbeitsstelle einer Offenend-Rotorspinnmaschine mit einem die Arbeitsstellen selbsttätig versorgenden Bedienaggregat,

Fig. 2:

eine durch das Bedienaggregat geöffnete Offenend-Spinnvorrichtung bei der Überprüfung des Spinnrotors durch eine am Reinigungskopf des Bedienaggregates angeordnete Sensoreinrichtung,

Fig.3 und 4:

verschiedene Ausführungsformen einer an der Spinntasse am Spinnrotor angeordneten Identifikationsmarkierung,

Fig. 5:

den in Figur 4 angedeuteten elektronischen Informationsträger in einem größeren Maßstab.

It shows:

Fig. 1:

in the calf section, a schematic side view of a work station of an open-end rotor spinning machine with an operating unit which automatically supplies the work stations,

Fig. 2:

an open-end spinning device opened by the operating unit when checking the spinning rotor by a sensor device arranged on the cleaning head of the operating unit,

Fig. 3 and 4:

different embodiments of an identification mark arranged on the spinning cup on the spinning rotor,

Fig. 5:

the electronic information carrier indicated in Figure 4 on a larger scale.

In Figure 1 is a side view of a job 2 Open-ended rotor spinning machine identified overall by the reference number 1 shown.

These work stations 2 have an open-end spinning device 3 and a winding device 4. In the spinning device 3 , as is known, a sliver 6 placed in spinning cans 5 spun into a thread 7, which is then in the Winding device 4 is wound into a cheese 8. The Cross-wound bobbin 8 is in one in the winding device 4 Coil frame 9 is stored and is during the coil trip a friction roller 11 driven. The finished cross-wound bobbins 8 are transported away via a machine-long cross-coil transport device 12.

The jobs 2 of the open-end rotor spinning machine 1 supplied by an automatically operating control unit 10, which is supported with its undercarriage 17 on rails 14, 14 '. The rails 14, 14 'preferably run in the superstructure of the Rotor spinning machine 1. The control unit 10 has, as by numerous references known and therefore not closer shown, a variety of handling devices for Spin on or to change the package on.

Among other things, such a control unit 10 has one Unlocking lever 13, with the open-end spinning device if necessary 3 can be opened and closed, as well via a cleaning head 16 for cleaning the spinning rotors 15. The spinning rotors are cleaned both preventively as well as after a thread break.

Both the release lever 13 and the one Drive 19 in the direction of the spinning housing 20 of the OE spinning device 3 extendable cleaning head 16 are in themselves known standard components of such control units 10.

The control unit 10 is also with its own Control device 18 equipped, for example, via a Machine bus, to a central control unit, not shown the open-end rotor spinning machine 1 is connected.

Figure 2 shows a situation in which the Operating unit 10 at a work station 2 of the open-end spinning machine engaged and with its unlocking lever 13 the spinning device 3 has opened. That is, that Cover housing 21 of the OE spinning device 3 is one Swivel axis 22 folded forward.

The structural design of such cover housing 21, with a Sliver opening device 23, a (not shown) Fiber guide channel, a fiber channel plate 24 and one Thread take-off tube 25 is known and therefore does not require any further explanation.

The spinning rotor 15 which rotates at high speed during the spinning process is mounted with its rotor shaft 26 in the bearing gusset of an axially thrust-free support disk bearing 27.
This means that the axes 30 of the pairs of support disks, only the right pair of support disks 28, as viewed from the operating aisle, is shown in FIG. 2, run parallel to the axis 29 of the rotor shaft 26.
The axial positioning of the rotor shaft 26 of the spinning rotor 15 in the bearing gusset of the support disk bearing 27 takes place via a magnetic bearing 31 which is effective on the rotor shaft end.
Such a magnetic bearing 31 is described in detail in DE 197 29 191.0, for example.
The magnetic bearing 31 has a stationary bearing component 45 fixed to the spinning housing, which comprises two permanent magnet rings each delimited by pole disks and a rotatable bearing component 32. The rotatable bearing component 32 is, as shown in FIGS. 3 and 4, by a bearing area 33 of the rotor shaft 26 educated.

This means that the bearing area 33 at the rotor shaft end of the spinning rotor 15 is exactly matched in its design to the stationary bearing component 45 of the magnetic bearing 31. Proper, secure positioning of the spinning rotor 15 in the bearing gusset of an axial thrust-free support disk bearing, even at a high operating speed, is consequently only ensured if the spinning rotor 15 has a bearing area 33 which is precisely matched to the stationary bearing component 45 of the magnetic bearing 31.
In order to ensure that only spinning rotors can be operated in open-end spinning devices 3 with axial thrust-free support disk bearings and magnetic positioning of the spinning rotor, which are suitable for this due to their construction, these spinning rotors 15 are identified with a corresponding identification mark 34 according to the present invention .

This identification mark 34 can either, as in 3, from a in the area of the rotor cup 35 arranged bar code 36 or, as indicated in Figure 4, from an electronic information carrier 37, for example one so-called transponders exist.

One such, shown on an enlarged scale in FIG Electronic information carrier 37 can for example be built like a small chip card. Of the electronic information carrier 37 has a transmission and Receive coil 38 and an integrated circuit 39. The Transmitting and receiving coil 38 and the integrated circuit 39 are preferably in an insulating layer 40, for example Glass or the like, embedded. This insulating layer 40 forms a protective coat for the relatively sensitive Electronics.

The electronic information carriers 37 are passive per se, that is, they do not have their own energy source.

The electronic information carriers 37 are only activated when if they are in the area of a sensor device 41 radiated electromagnetic force field. In this case, a transmission device and a Receiving coil of the sensor device 41 and via the transmitting and Reception coil 38 of the electronic information carrier 37 an inductive energy and signal transmission.

The electronic information carriers described above point towards optical identification marks, such as bar codes or the like, the great advantage to prevent external influences such as dust, fiber fly etc., largely insensitive and therefore especially for the Use in textile companies are ideal.

Function of the facility:

In modern open-end rotor spinning machines 1, it is due to the high speeds of the spin agent has long been common, the Open-end spinning devices 3 mechanically, that is, by means of to spin an operating unit 10. That applies to both a restart of the spinning machine, for example after a Lot change, as well as after a thread break.

For re-spinning, the control unit 10 locks onto the concerned job 2 and opens with his Release lever 13 first the open-end spinning device 3. A cleaning head 16 is then placed on the spinning housing 20 put on and the spinning cup 35 of the spinning rotor 15 cleaned. For this purpose, the cleaning head 16, as is known, via a scraper 42 which can be moved into the interior of the rotor and a rotor drive device 43.

There is also one in or on the cleaning head 16 Sensor device 41 arranged via a signal line 44 to the control device 18 of the operating unit 10 connected.

The sensor device 41, which, depending on the type of design of the identification marks 34 arranged on the spinning rotors 15, is designed as an optical sensor device, for example as a scanner, as an electronic transmitting and receiving device, as an induction coil, etc., checks the cleaning of the spinning rotor 15 identification mark 34 arranged on the rotor cup 35.
In the case of electronic information marking 34, this means, for example, that the data recorded by the sensor device 41 is processed in the control device 18 of the operating unit 10, that is to say is compared with data stored in a memory unit 45 connected to the control device 18.

The further process of the piecing process depends on the result of this comparison.
For example, if the sensor device 41 cannot detect an identification mark 34 on the rotor cup 35 or if the data on the identification device 34 does not correspond to the data stored in the storage unit 45, the control device 18 of the control unit 10 immediately stops the piecing attempt and on the relevant one Spinning station red light set.

Claims (7)

Method for operating an open-end spinning machine with a large number of open-end spinning devices and an operating unit which supplies the spinning devices automatically, the open-end spinning devices each having a spinning rotor which is mounted with its rotor shaft in the bearing gusset of an axially thrust-free support disk bearing and is positioned via a magnetic bearing,
characterized, that an identification mark (34) arranged on the spinning rotor (15) is checked via a sensor device (41) connected to the control device (18) of the operating unit (10) and that a piecing attempt is only started when the spinning rotor (15) is identified as safe in terms of safety on the basis of its identification mark (34). A method according to claim 1, characterized in that the Identification mark (34) as a different one Information carriers containing spinning rotor data (36, 37) is formed and which on the information carrier (36, 37) contained data in a control device (18) of the Control unit (10) with in a storage unit (45) stored data are compared. Device for performing the method according to Claim 1, characterized in that in the area of Rotor cup (35) of the spinning rotor (15) one Identification mark (34) is arranged by one on the control unit (10) arranged on the Control device (18) of the control unit (10) connected sensor device (41) is detectable. Device according to claim 3, characterized in that the sensor device (41) on the cleaning head (16) of the Operating unit (10) is arranged. Device according to claim 3, characterized in that an electronic identification mark (34) Information carrier (37) is used. Apparatus according to claim 5, characterized in that the electronic information carrier (37) is a so-called Is transponder. Device according to claim 3, characterized in that as an identification mark (34) an optical sign, for example a bar code (36) is used.

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