CH714412A1 - Method for operating a winding machine for rewinding cops of a preceding ring spinning machine. - Google Patents

Abstract

A method is disclosed for operating a winder (24) for rewinding cops (7) of a preceding ring spinning machine (1) having a plurality of spindles (24) arranged on a spindle bank and each having an electric drive (FIG. 9). Each electric drive (9) has a decentralized control module, which cooperates with the electric drive (9) and which has means for communication by means of a data bus with a superordinate central control device. The cops (7) are transported by a conveyor system (26) from the ring spinning machine (1) to the winder (24). According to the invention, the decentralized control modules of the individual spindle drives (9) acquire information about the shape or construction of the cops (7) or about the created yarn. This information is transmitted to the winder (8); and the winder (24) the received information when unwinding the cops (7) and the preparation of the cheeses (25). The invention also relates to a correspondingly equipped ring spinning machine (1).

Description

Description TECHNICAL FIELD The invention relates to a method for operating a dishwasher for rewinding cops of a preceding ring spinning machine according to the preamble of the independent patent claim. The invention also relates to a correspondingly equipped ring spinning machine.

Background Art Single-spindle drive ring spinning machines as an alternative to belt drive have been known for some time. Accordingly, there are numerous publications in this field, which inter alia with the drive concept or with the attachment of such spindle units on the machine frame, i. deal with the spindle bank. For example, CH 698 768 A2 discloses such a spinning machine with a single spindle drive.

The drive assemblies comprise a rotationally effective electric drive motor, which acts on a end side of a shaft of the drive motor manipulator provided, for example, equipped in the form of a guide roller on a thread, a fiber, a nonwoven or knitted fabric. Furthermore, various external sensors are typically provided, which serve in particular for detecting a position of the thread, the fiber, the fleece or the knitted fabric, as well as additional actuator elements. The additional actuator elements serve, for example, for pretensioning or positioning the thread, the fiber, the knitted fabric or the fleece. The rotary electric drive motor is usually provided as a whole elastically mounted to protect the drive assembly on the one hand from resonance problems and to ensure on the other hand, even at high speeds sufficient smoothness and durability.

For the control or regulation of the electric drive motor, a decentralized control module is provided. The decentralized control module, which is functionally and usually also provided spatially as part of the drive arrangement, also interacts with the external sensors and the additional actuator elements. The decentralized control module is connected via suitable communication means with a superordinate central control device. The central control unit coordinates in particular a plurality of drive arrangements of the textile machine. In principle, the use of such drive arrangements in textile machines has proven itself over many years.

The document EP 2 999 096 A2 relates to a textile machine comprising at least one drive arrangement comprising a rotary electric drive motor with a stator at least partially comprised of a housing of the drive motor, which has at least one winding, with a rotatable on a shaft of the drive motor in With respect to the stator held rotor and with at least one bearing for the shaft, comprising elastic means for supporting at least individual functional components of the drive motor and comprising a drive motor associated with the decentralized control module which cooperates with the drive motor on the one hand and with at least one sensor of the drive arrangement on the other hand and which Means for communicating with a parent central control device, wherein at least one bearing provided for supporting the shaft bearing via the elastic means resiliently supported relative to the stator to the housing i in such a way that the shaft with the rotor is held movably relative to the stator, that a synchronous electric motor is provided as the drive motor, and that a position of the shaft relative to the housing and / or a rotation angle of the shaft via a first sensor are detectable.

The manufactured on the jobs of such ring spinning machines spinning cops that contain relatively little yarn volume are wrapped in a subsequent operation on the jobs of dishwashers to large-volume cheeses. There are various methods known to change the winding speed of the dishwasher.

In a known device according to CH 669 177, a control of the winding speed and thus also the thread take-off speed in dependence on the amount of residual thread on the spinning cop. That is, in this device is initially wrapped at the beginning of Kopsreise with a relatively high winding speed, the winding speed at the end of Kopsreise but lowered significantly to an uncritical level. The winding speed corresponds to a coil speed of the coil to be wound. With this known method, although it was possible to limit the thread tension which increases continuously without corresponding measures during a cop trip, and thus significantly reduce the thread breaks, the reduction of the winding speed during the last third of the cop trip results in a relatively low average winding speed, which results in respect to the Efficiency of such dishwashers negative effect.

Also US4805846 discloses an automatic dishwasher, which can adjust the speed for each winding unit, so that a thread breakage is prevented.

It is also known in this connection to monitor the hairiness of the yarn to be repulped during the winding process by means of a yarn cleaner and to reduce the winding speed when reaching or exceeding a limit of the hairiness.

EP 2 388 222 discloses a method for producing spinning cops whose yarn winding arranged on a coping sleeve has a yarn length and winding size provided by the spinning program of a ring spinning machine, and a ring spinning machine for carrying out the method. There, it is provided that the optimum position and size of the winding of the cops to be produced on the work stations of ring spinning machines is determined by evaluating the unwinding behavior of the spinning cop when rewinding at least one spinning cop on a workstation of a dishwasher.

WO 9 215 737 discloses a method and apparatus for controlling a networked plant. This document refers to the interaction of linked process stages e.g. a ring spinning machine, possibly with one of these ring spinning machine associated operating machine, and a linked with the ring spinning machine dishwasher, which in turn is equipped with a yarn cleaner, which is suitable for detecting the yarn quality.

A disadvantage of these embodiments but that additional information of the individual spindle drives the ring spinning machine can not be used on the dishwasher, for example, must be checked separately on the dishwasher, if there are faulty places to eliminate them. In addition, it must be determined disadvantageous for each individual cop when returning, whether the dishwasher has completely unwound the cop, or if any residues remain on the cop.

DESCRIPTION OF THE INVENTION The object of the present invention is therefore to provide a method for operating a dishwasher, which is preceded by a ring spinning machine with single spindle drives, which has an improved rewinding behavior of the cops.

Object of the present invention is further to provide a ring spinning machine with single spindle drives, in the additional dishwasher for a subsequent information on the shape and structure of the cop and the yarn quality, etc. are provided.

The objects are achieved by a method according to the preamble of the independent method claim characterized in that - detect the decentralized control modules of the individual spindle drives information about the shape or structure of the cops or on the created yarn; - transmits this information to the dishwasher via an interface; and - the dishwasher takes into account the information received when unwinding the cops and producing the cheeses.

The decentralized control modules of the individual spindle drives can as information of each cop - the length meter yarn on the copses; - The number and position of the thread breaks over the yarn length; the number and position of the intermediate stops during the cop assembly; - the shape and structure of the cops; - Irregularities in the hairiness of the yarn; - irregularities in the yarn structure; transmit via an interface of the dishwasher.

Advantageously, this information can thus be determined according to the invention directly on the individual spindle drive; This happens more precisely, more comprehensively and more promptly than in the exemplary embodiments mentioned in the prior art.

The dishwasher can thus advantageously - adjust the speed profile of the rewinding of the cops according to the information of the individual spindle drives; and / or - cutting out bad spots; and / or - consider the thread tension of the cops during rewinding; and / or - take into account the shape of the cops during rewinding; The work of rewinding can thus be advantageously designed more effective.

The yarn length of the yarn wound on the cop can also be transmitted and the dishwasher can thus determine whether a cop has been completely unwound. All not completely unwound cops can thus be fed to the dishwasher again.

Advantageously, at least one section module may be present in the communication structure of the ring spinning machine, which is assigned to a plurality of decentralized control modules, and which contains information about the shape or structure of the cops or about the created yarn of an associated, decentralized control module of the section module queried and sent by this to the section module and evaluated there. Alternatively, the information from the associated decentralized control module can be evaluated and sent from the control module to the section module associated with the decentralized control module.

As a conveyor system from the ring spinning machine to the dishwasher, an automated or manual conveyor system can be used in the invention. For example, the transport of the cops could be transported with a peg tray or manually with a car from the ring spinning machine to the dishwasher.

The objects are also achieved by a corresponding ring spinning machine, which is characterized in that - the decentralized control modules comprises means for determining information about the shape or structure of the cops or on the created yarn; and - an interface for the central transmission of the acquired information to the dishwasher comprises.

Advantageously, this information can thus be determined according to the invention directly on the individual spindle drive; This happens more precisely, more comprehensively and more promptly than in the exemplary embodiments mentioned in the prior art. Between the decentralized control modules and the higher-level central control unit, section modules can be present, which are assigned to a multiplicity of decentralized control modules and which forward the information accordingly.

BRIEF DESCRIPTION OF THE FIGURES Further advantages of the invention are described in the following embodiments, wherein

Fig. 1 shows schematically a ring spinning machine with single spindle drive;

2 shows schematically the communication system of the ring spinning machine; and FIG. 3 schematically shows a ring spinning machine in conjunction with a dishwasher; FIG. demonstrate. Only the features important to the invention will be shown. Identical features are provided in different figures with the same reference numerals.

1 shows schematically a ring spinning machine 1 according to the invention, which has a multiplicity of spinning stations 2 arranged next to one another. The spinning units 2 are arranged in a longitudinal direction x of the ring spinning machine 1 between a head 3i and a foot 32. Head 3-, and foot 32 of the ring spinning machine 1 can contain bearings, drives, control, etc., which are necessary for the operation of the machine are. As is further seen, for example, at two spinning stations 2 shown schematically in FIG. 1, each spinning station 2 consists of a roving bobbin 4, which is arranged above a drafting arrangement 5, and on which a roving 6 is wound. The roving 6 runs from the roving bobbin 4 via the drafting device 5, where it is stretched, to then be guided to a Garnbildungselement. A circulating runner guides the finished yarn onto a cop 7 placed on a driven spindle 8.

Fig. 2 shows schematically the communication system of the ring spinning machine 1. The ring spinning machine 1 has 8 single spindle drives 9 for driving the spindles, which drive the spindles 8. As a single spindle drive 9 electric drives, such as electric synchronous motors, asynchronous motors, brushless DC motors, etc. or equivalent motors are used. Each individual spindle drive 9 is assigned a decentralized control module 10.

The spindles 8, the individual spindle drives 9 and the control modules 10 are arranged on the spindle bank 22 of the ring spinning machine 1. The spindle rail 22 is shown only schematically and the components which are located on the spindle rail 22 are correspondingly in Fig. 2 within the element. The connections of the electric drives 9 have connecting cables, which are combined on the spindle bank 22 and connected at one end of the spindle bank to a power supply. Advantageously, the connections to the electrical drives 9 are realized by plug connections.

The control modules 10 have the task to monitor the Einzelspindelantriebe 9 and implement commands from the higher-level control. It is conceivable within the scope of the invention that a plurality of decentralized control modules 10 of the individual spindle drives 9 are combined. A multiplicity of decentralized control modules 10, for example 64 control modules 10, communicate with a higher-level section control module 11, two of which are shown by way of example in FIG. 2. However, the number of section control modules 11 will depend on the number of spindles 8, as indicated by the dashed control module 10. The section modules 11 process the information from the control modules 10 and forward the information. Several decentralized section control modules 11 communicate with a higher-level central control module 12 of the ring spinning machine 1. The central control module 12 is the central machine control, which has all the machine data, this statistically processed and visualized. To the central control module 12, a display 20 is connected for this purpose. The machine data can be queried by the user via the display 20 at this point. It is also possible to forward this data to a mobile application.

Between the central control module 12 and the section control modules 11, a machine data bus 13 is present and between the section control modules 11 and the remote control modules 10, a section data bus 14 is present. The section data bus 14 is responsible for the communication between control modules 10 and the section control modules 11; Commands from the section module 11 are transmitted to the control modules 10 via it, and the operating states or measured data of the electric drives 9 of the spindles 8 are directed by control modules 10 to the section control modules 11.

Additionally and independently of the data buses 13, 14, there is a digital communication network 15 with which the central control module 12 and the remote control modules 10 communicate with each other. About the communication network 15 time-critical and security-related information from the central control device 12 by the section control modules 11 (dashed line) forwarded directly to the control modules 10. At the same time, all the decentralized control modules 10 of the electric drives 9 can be addressed by the central control device 12 via the communications network 15, for example a start / stop signal or a command for controlling the acceleration signals can be transmitted from the central control device 12 via the digital communications network 15. or brake ramp to the remote control modules 10 are sent.

FIG. 2 further shows command and signaling elements 17, wherein each individual spindle drive 9 is assigned exactly one command and signaling element 17. These command and signaling elements are arranged in the form of operating elements 17 on the ring rail 23 of the ring spinning machine 1. Several control modules 16 are connected via a section command bus 19 with the command and reporting elements 17 and parent. A machine command bus 18 provides for the communication between the control modules 16 and the central module 12. If a control module 10 detects a deviation from the setpoint, this information is sent via the bus system 14, 13, 18, 19 to the associated signaling element 17 and displayed there. The operator then has the option of entering a command (e.g., start or stop) on the ring rail 23 on the command element 17, which is then sent back to the control module 10 via the bus system 14, 13, 18, 19. Of course, it is possible that the control module 10 itself performs an action, so for example, it can turn off the spindle in case of yarn breakage.

From the decentralized control modules 10 of the individual spindle drives 9, a yarn break or a creep spindle can be determined due to the power consumption. Due to the current shape, the speed, the rotor speed, the state of the rotor, the operating state of the spindle, the bearing condition or bearing damage, the oil level, etc. can be determined for mechanical bearings. If the spindle 8 is equipped with a magnetic bearing, the weight of a cop 7 can additionally be determined via the current consumption of the active magnetic bearing. In the event of a yarn breakage and the associated change in power consumption, a particular decentralized control module 10 can report this to the section control module 11. However, the section module 11 can also interrogate all assigned decentralized control modules 10 in succession. The information thus obtained is then evaluated in succession and determines the operating conditions.

The section module 11 has for determining the said operating conditions (rake) means for evaluating the information obtained. The calculating means comprise means for forming a root mean square current consumption and transforming the current form. For the transformation of the signal from the time domain into the frequency domain, in particular the Fourier transformation, the wavelet transformation or the Hil-bert-Huang transformation with the Empirical Mode Décomposition are used as the main constituent. In the context of the Fourier transformation, in particular the short-time Fourier transformation, the Gabor transformation, the fast Fourier transformation or the discrete Fourier transformation in the training can be used as a discrete cosine transformation or as a discrete sine transformation. In particular, the wavelet transformation uses the discrete wavelet transformation, the fast wavelet transformation, the wavelet packet transformation or the stationary wavelet transformation. Likewise, discrete, static characteristic quantities of the signals can be used and a transformation of the signals in the frequency range can be dispensed with. In particular, random variables such as the expected value, the absolute deviation, the variance, the skewness, the excess or the covariance are used as parameters. Likewise, the signals can be correlated, in particular cross-correlated or autocorrelated. Finally, a combination of the transformed signals and the static parameters can be represented. The common intention is, in particular, to compare the actual measurement signal with the reference signal state in the course of the pattern recognition, wherein the reference signal can be generated from information of one or more neighboring spindles or read out of a memory. This is done in particular on the basis of specific features which are generated from the signal and combined in a feature tool, based on a statement about the similarity of the signals in question.

In an alternative embodiment, the control modules 10 have the above-mentioned (arithmetic) means to evaluate the operating conditions. These then send the result to the assigned section module 11 for further processing. Further, the control modules 10 can use the information from the current signal of the electric drives 9 for speed control of the spindle 8, the rotor and the control of the thread tension.

Fig. 3 shows schematically a ring spinning machine 1 and a dishwasher 24, which forms a machine combination through a connection in the form of a peg tray conveyor system 26 and a bidirectional interface 27 (shown schematically). It is also another suitable, automated or manual transport system within the scope of the invention conceivable. For example, the transport of the cops 7 could be manually transported by a car from the ring spinning machine 1 to the dishwasher 24. The dishwasher 24 rewinds the cops 7, which have been conveyed by means of the conveyor system 26 to a winding station, to cheeses 25. The dishwasher 24 is controlled by a controller 28 accordingly.

The information obtained from the described single spindle drives 9 of the ring spinning machine 1 during the construction of the cop 7 and transmitted via the bidirectional interface 27 may include one or more of the following: - the length of yarn on the cops; - The number and position of the thread breaks over the thread length; - the number and position of the intermediate stops (lower thread tension).

This information is determined by the decentralized control modules 10 of the individual spindle drives 9, for example via a speed measurement, the number of stops, etc. and is sent to the central control module 12. - the shape and construction of the cop.

This information can be determined if, in addition to the above information about length meter, number and position of the thread breaks, etc., the position of the spinning ring and the height is processed relative to the cop 7. - Irregularities in hairiness; Irregularities in yarn structure, e.g. Bead chains, recurring patterns during the cop construction, etc .; - In the production of core yarn areas can be found in which the soul is not cleanly sheathed.

In addition to the above three first mentioned information, the patterns of power consumption and resulting torque absorption are taken into account to get this information from the single spindle drive 9. The cops are then either directly with an identification means e.g. RFID tag marked or identification takes place via the peg-tray conveyor system 26, so that the dishwasher 24 can assign the information obtained to the respective cops 8. Each individual spindle drive 9 detects by means of the control module 10, the information for each cop created 7. The analysis and calculation of the information is done - analogous to the information referred to in FIG. 2 - depending on the available computing capacity either directly in the decentralized control modules or in the section modules 11. The information is sent via the section modules 11 to the central control module 12. The central control module 12 forwards this information centrally via the bidirectional interface 27 to the dishwasher 24 for processing.

Thus, the dishwasher 24 can be operated in a more targeted and efficient manner when rewinding the cop 7 by the controller 28: The speed profile of the rewinding of the cops 7 can be adjusted in accordance with the information of the individual spindle drives 9: The individual shape of the cops 7 is transmitted and the rewinding speed can take into account the shape of the cops 7 (eg slowly with a small Kops diameter and quickly with a large Kops diameter). This prevents yarn breaks in the winding process and thus leads to higher efficiency in the winding process. The individual thread tension course of the cops 7 is transmitted and the rewinding speed can take into account the thread tension on the cops 7 (for example, low thread tensions occur at intermediate stops). This prevents that simultaneously several layers are removed from the cop 7 and this leads to a sorting out of the cop 7.

In the winding process can be determined in particular whether the cop 7 was completely unwound. This allows a more efficient logistics when returning the cops on the Peg Tray conveyor system 26 of the dishwasher 24 to the ring spinning machine 1. A separate control of the cop 7, whether they were completely unwound, is eliminated, since only completely unwound cops 7 are returned. All not completely unwound cops 7 are fed again on a separate line of the dishwasher 24.

Known faulty locations are transmitted and do not have to be detected first. As a result, the thread piece can be held to the cheese 25 and eliminates the thread search on the cheese 25: - A single faulty spot can be cut out directly. This leads to higher efficiency in the winding process. - Close successive defect-retaining points (e.g., strings of pearls) can be cut out as a whole. This leads to higher efficiency in the winding process. - Core yarn areas in which the soul is not clean - or not sheathed can be cut out as a whole. This leads to higher efficiency in the winding process.

Since faulty points can be approached targeted and thread breaks in the rewinding can be prevented by the better process control, the thread can be subtracted tangentially from the cop. This allows a "balloon-free" threadline during rewinding and thus prevents quality losses in the yarn (especially in hairiness).

DESCRIPTION OF SYMBOLS 1 ring spinning machine 2 spinning stations 3-I head of ring spinning machine 1 32 feet of ring spinning machine 1 4 roving bobbin 5 drafting system 6 roving 7 cop 8 spindle 9 single spindle drive of a spindle 8 10 decentralized control module of a single spindle drive 9 11 section control module 12 central control module 13 machine data bus 14 section data bus 15 digital communication network 16 Control module for command and signaling element 17 17 Command and signaling element, operating unit 18 Machine command bus 19 Section command bus 20 Display 22 Spindle bank 23 Ring bank 24 Dishwasher 25 Cross-wound bobbin 26 Peg tray Conveying system 27 Bidirectional interface 28 Control of the dishwasher 8 X Longitudinal direction

Claims (15)

claims A method of operating a dishwasher (24) for rewinding cops (7) of a preceding ring spinning machine (1) having a plurality of spindles (24) disposed on a spindle bank (22) and each having an electric drive (9), wherein each electric drive (9) has a decentralized control module (10) which cooperates with the electric drive (9) and which means for communication (10) by means of a data bus (13, 14) with a superordinate central control device (10). 12), wherein the cops (7) of a conveyor system (26) from the ring spinning machine (1) to the dishwasher (24) are transported, characterized in that - the decentralized control modules (10) of the single spindle drives (9) information about the shape or detecting the structure of the cops (7) or on the created yarn; - transmits this information to the dishwasher (8) via an interface (27); and - the dishwasher (24) takes into account the received information when unwinding the cops (7) and producing the cheeses (25). 2. A method for operating a dishwasher (24) according to claim 1, characterized in that the decentralized control modules (10) of the individual spindle drives (9) as information of each cop (7) - the Längenmeter yarn on the cops (7); - The number and position of the thread breaks over the yarn length; the number and position of the intermediate stops during the cop assembly; - The shape and structure of the cops (7); - Irregularities in the hairiness of the yarn; - irregularities in the yarn structure; via an interface (27) of the dishwasher (24) transmit. 3. A method for operating a dishwasher (24) according to any one of claims 1 or 2, characterized in that at least one section module (11) is present, which is associated with a plurality of decentralized control modules (10), and which contains the information about the form or structure of the cops (7) or about the yarn produced by an assigned, decentralized control module (10) from the section module (11) queried and sent from this to the section module (11) and evaluated there. 4. A method for operating a dishwasher (24) according to any one of claims 1 or 2, characterized in that at least one section module (11) is present, which is associated with a plurality of decentralized control modules (10), and which contains the information about the form or structure of the cops (7) or on the yarn produced by an associated, decentralized control module (10) is evaluated and sent from the control module (10) to the decentralized control module (10) associated with the section module (11). 5. A method for operating a dishwasher (24) according to one of the preceding claims, characterized in that the dishwasher (24) adapts the speed profile of the rewinding of the cops (7) according to the information of the individual spindle drives (9). 6. A method for operating a dishwasher (24) according to one of the preceding claims, characterized in that the dishwasher (24) are transmitted as information incorrect locations and these are cut out. 7. A method for operating a dishwasher (24) according to one of the preceding claims, characterized in that the dishwasher (24) takes into account the thread tension of the cops (7) during rewinding. 8. A method for operating a dishwasher (24) according to one of the preceding claims, characterized in that the dishwasher (24) takes into account the shape of the cops (7) during rewinding. 9. A method for operating a dishwasher (24) according to one of the preceding claims, characterized in that the yarn length of the cop (9) is transmitted and the dishwasher (24) determines whether a cop (7) has been completely unwound. 10. A method for operating a dishwasher (24) according to any one of the preceding claims, characterized in that the cops (7) by an automated or manual conveyor system (26) from the ring spinning machine (1) to the dishwasher (24) are transported. 11. A method for operating a dishwasher (24) according to any one of the preceding claims, characterized in that all not completely unwound cops of the dishwasher (24) are fed again. 12. ring spinning machine (1) for performing one of the preceding methods, - with a plurality of spindles (8), each comprising an electric drive (9), - wherein each electric drive (9) has a decentralized control module (10) which cooperating with the electric drive (9) and having means for communication (10) by means of a data bus (13, 14) with a superordinate central control device (12), - with an automatic or manual conveyor system (26) for transporting the cops (7) from the ring spinning machine (1) to a dishwasher (24), characterized in that - the decentralized control modules (10) comprise means for determining information about the shape or construction of the cops (7) or about the created yarn; and - an interface (27) for centrally transmitting the acquired information to the dishwasher (24). 13. ring spinning machine (1) according to claim 12, characterized in that the decentralized control modules (10) as information of each cop (7) - the length meter yarn on the cops (7); - The number and position of the thread breaks over the yarn length; the number and position of the intermediate stops during the cop assembly; - The shape and structure of the cops (7); - Irregularities in the hairiness of the yarn; - irregularities in the yarn structure; determine. 14 ring spinning machine (1) according to any one of the preceding claims 12 or 13, characterized in that between the decentralized control modules (10) and the parent central control device (12) section modules (11) are present, which associated with a plurality of decentralized control modules (10) are. 15. ring spinning machine (1) according to any one of the preceding claims 12 to 14, characterized in that an automatic or manual conveyor system (26) for transporting the cops (7) of the ring spinning machine (1) to a dishwasher (24) is present.