EP3231903A1 - Method for operating a textile machine and textile machine - Google Patents

Abstract

The invention relates to a method for operating a textile machine (1) having a plurality of similar jobs (2), wherein the yarn is produced by means of the jobs (2) during normal operation of the same or rewound from a supply spool on a receiver coil, and wherein the normal operation at the individual work stations (2) after a stop of the textile machine (1) initiated by a service operation or at certain intervals by a service operation in the form of a piecing, a sleeve change operation or a Garnverbindungsvorgangs is interrupted. According to the invention, it is proposed that at least one of the said service operations is subdivided into a plurality of subsequences, and that a pending subsequence is performed independently of the remaining subsequences of the corresponding service operation, if the energy resources required for carrying out the pending subsequence are available. Moreover, the invention relates to a textile machine.

Description

The present invention relates to a method of operating a textile machine having a plurality of similar workstations, the yarn being manufactured or rewound from a supply spool onto a receiver spool by means of the work stations during normal operation, and normal operation at the individual workstations following a stop of the spool Textile machine is initiated by a service operation or interrupted at certain intervals by a service operation in the form of a piecing, a sleeve change operation or a Garnverbindungsvorgangs.

Further, a textile machine having a plurality of similar jobs for making yarn or for rewinding yarn from a supply spool to a receiver spool is proposed, wherein lines are provided for transporting energy resources, and wherein the workstations comprise means for performing a piecing operation, a sleeve changing operation and / or. or a yarn joining operation.

Generic textile machines may be formed as spinning machines, which serve to produce a yarn from a supplied fiber structure, or as a winding machines, the latter being adapted to rewind yarn from supply spools on receiver coils and in this case preferably to remove yarn defects from the yarn. The spinning machines may be, for example, ring, rotor or air spinning machines. The normal operation of these textile machines is interrupted again and again.

The reasons for such disruptions of normal operation are many. One reason is a thread break. Another is a cleaner cut, so the deliberate cutting out a thread section, because this too thick, too was thin or too dirty or for some other reason did not meet the requirements. Also, there is an interruption of normal operation when a full sleeve must be replaced by an empty sleeve at a job. An interruption of the normal operation at all workstations, so a stop of the textile machine, occurs, for example, in a batch change, so if the textile machine is switched to the production of another thread (alternative name: yarn).

After each of these interruptions, a service operation is required to restore normal operation. In general, these service operations require energy resources, whereby only limited energy resources are available on a textile machine. So that the required energy resources do not exceed the available energy resources, only a certain number of service operations are executed simultaneously. In addition, pending service operations must wait until an ongoing service operation is completed, thereby freeing up capacity. During this waiting period, the productivity of the textile machine is reduced.

It is therefore an object of the present invention to improve the method for operating the textile machine in such a way that the productivity of the textile machine is increased.

The object is achieved by a method for operating a textile machine and a textile machine with the features of the independent claims.

A method for operating a textile machine with a plurality of similar workstations is proposed. With the help of jobs, yarn is produced during normal operation of the jobs or yarn is rewound from a supply spool to a receiver spool. In the case of the production of yarn, the textile machine is therefore one Spinning machine. It is irrelevant for the present invention, whether it is a ring, a rotor, an air spinning machine or other spinning machine. In the case of rewinding from a supply spool onto a receiver spool, the textile machine is then designed as a winding machine.

After a stop of the textile machine, for example, after a game change, the normal operation is initiated by a service operation. For example, in a spinning machine, this service operation is a piecing operation. However, the normal operation can also be interrupted at certain intervals by a service operation, for example a piecing process, a tube changing process or a yarn joining process. These service operations can be performed both by devices that are assigned to one or a few jobs, including service devices that are mobile to individual jobs. Preferably, however, the method is carried out in textile machines whose work stations are each equipped individually or in pairs with workstation's own service devices, which are arranged stationary. Alternatively or additionally, of course, along the workstations movable service devices, eg. B. in the form of known in the art service robots, are used.

According to the invention, at least one of said service operations is subdivided into a plurality of subsequences. These subsequences are performed one after the other, but it is possible to take a break after each or every subsequence. A pending subsequence is performed independently of the other subsequences of the corresponding service operation if the energy resources required to perform the pending subsequence are available. The required energy resources therefore only have to be available for the next subsequence and not for the entire service operation. So partial sequences of a service operation can already be processed if the required Energy resources for the entire service operation are not yet available. Thus, the energy resources of the textile machine are better utilized and thus increases the productivity of the textile machine.

It may happen that the energy resources required by the upcoming subsequences exceed the available energy resources. It is then advantageous if the selection of the subsequence to be carried out next takes place in such a way that the productivity of the textile machine is maximized. For example, there are yarn joining operations for two workstations, with the first subsequence pending at one workstation and the last subsequence of this service operation at the other workstation. If the energy resources are not available for both subsequences, then first the subsequence for the job is performed, in which the last subsequence is pending, since this job can then proceed immediately with the normal operation and thus the productivity is increased.

In the event that the energy resources required by the upcoming subsequences exceed the available energy resources, it is also advantageous if the subsequence associated with the workstation that operates fastest and / or most reliably and / or on the next job is next performed Fastest and / or most reliable resumes normal operation. For example, if a piecing process for two jobs to perform and the free energy resources are sufficient only for a piecing, then the piecing is performed first at the job that spins faster and / or reliable or experience can be faster and / or more reliable spun. This increases the productivity of the textile machine.

Advantageously, the amount of at least one consumed energy resource, a required energy resource and / or an available energy resource is stored in a memory and is from this accessed. It is possible to use a value for each subsequence of a service operation or - which is more complex, but more accurate - to use separately determined values for each workstation. In both cases, this information can be used to quickly and easily calculate whether there are enough energy resources available for a pending subsequence or not.

It is also advantageous if the amount of at least one consumed energy resource and / or an available energy resource is measured during ongoing operation of the textile machine. The resulting measured values are then used to determine the required or the available energy resources. Thus, fluctuations in energy demand and in particular in the available energy resources can be considered and the available energy resources can be better utilized.

It is advantageous if the energy resources are taken into account within their natural units of jobs. For example, the power supply of a textile machine is usually centrally regulated - the natural units of jobs would be in this case all jobs. In contrast, the supply of negative pressure is often realized separately per machine side. In that case, the natural unit of jobs is the work sites of one machine side each. This structure considers the energy resources as they are available: thus, a workstation can not access the negative pressure from the other side of the machine from one side of the machine.

Advantageously, the energy resources include electrical power, compressed air and / or vacuum as these are the most commonly required energy resources in textile machinery. However, the proposed method can also be used without problem for other energy resources.

It is advantageous if the partial sequences of the piecing process include a thread search operation and a workstation startup process. This division is advantageous for two reasons: on the one hand, it is easily possible to interrupt the piecing process after the thread-seeking operation; For holding the found yarn end are usually no or only very small energy resources needed. On the other hand, a lot of negative pressure is needed for the thread search process, while more electrical power is needed for the workstation run-up process. By this division of the subsequences so the available energy resources can be optimally utilized.

In the case of a sleeve change operation, it is advantageous if it has a deceleration process, a sleeve replacement process and a workstation startup process. During braking, a rotating around its longitudinal axis sleeve on which a thread was wound into a cop, braked and possibly brought to a standstill. The only slowly or no longer rotating sleeve is replaced during the sleeve exchange process then by an empty sleeve. This is followed by the work site start-up process, in which the empty sleeve is set back in rotation and the work after receiving the coming of a spinning unit or a supply spool yarn through the sleeve returns to normal operation. Again, between the subsequences are usually easy interruptions possible and the sub-sequences differ again by their energy needs.

Finally, in the case of a yarn joining operation, it is advantageous if it includes a thread-seeking operation, a splicing operation and a work-start-up operation. Such a Garnverbindungsvorgang is for example after a thread break or a cleaner cut of need. Then, in the thread-seeking process, a free thread end is first searched on a partially wound sleeve, for example with a suction tube operating under reduced pressure. This thread end is then with a freshly spun thread (in spinning machines) or combined with a thread from the supply spool (in winding machines) and connected in the splicing process. Finally, the work place start-up procedure follows again so that the workstation can start its normal operation. This division of the subsequences again allows interruptions between the subsequences and the subsequences have different energy requirements, which increases the overall productivity of the textile machine.

Said method is carried out according to the preceding description, wherein said features can be implemented individually or in any combination.

Further proposed is a textile machine with a plurality of similar jobs for producing yarn or for rewinding yarn from a supply spool onto a receiver spool. Thus, the textile machine can be a spinning machine or a winding machine. The textile machine has lines for transporting energy resources, for example electric current, negative pressure or compressed air. In addition, the workstations have devices for performing service operations. These service operations include a piecing operation, a sleeve changing operation and / or a yarn joining operation.

According to the invention, the textile machine has a control unit or is in operative connection with a control unit. The control unit is designed so that it operates the textile machine according to the method described above. In particular, therefore, the service operations are divided into several subsequences. The control unit then causes the execution of a pending partial sequence independently of the remaining partial sequences of the corresponding service operation, if the energy resources required for this purpose are available.

Figur 1

eine schematische Draufsicht einer erfindungsgemäßen Textilmaschine,

Figur 2a

den Verbrauch von elektrischem Strom eines einzelnen Anspinnvorgangs,

Figur 2b

den zum Anspinnvorgang aus Figur 2a gehörenden Verbrauch von Unterdruck,

Figur 3a

den Verbrauch von elektrischem Strom von Anspinnvorgängen an fünf Arbeitsstellen nach dem herkömmlichen Verfahren,

Figur 3b

den zu den Anspinnvorgängen aus Figur 3a gehörenden Verbrauch von Unterdruck,

Figur 4a

den Verbrauch von elektrischem Strom von Anspinnvorgängen an fünf Arbeitsstellen nach dem erfindungsgemäßen Verfahren,

Figur 4b

den zu den Anspinnvorgängen aus Figur 4a gehörenden Verbrauch von Unterdruck.

The process according to the invention is described in detail in the following example. Show it:

FIG. 1

a schematic plan view of a textile machine according to the invention,

FIG. 2a

the consumption of electricity of a single piecing process,

FIG. 2b

for the piecing process FIG. 2a associated consumption of negative pressure,

FIG. 3a

the consumption of electricity from piecing operations at five workstations according to the conventional method,

FIG. 3b

to the piecing operations FIG. 3a associated consumption of negative pressure,

FIG. 4a

the consumption of electrical current from piecing operations at five workstations according to the method of the invention,

FIG. 4b

to the piecing operations FIG. 4a associated consumption of negative pressure.

FIG. 1 shows a textile machine 1 according to the invention with a plurality of jobs 2 (wherein similar sections / components of the textile machine 1 are drawn the same and for reasons of clarity usually only a portion of the sections / components are provided with a reference numeral). Each of these jobs 2 has a device 3 for performing a service operation, for example, a piecing operation. At the machine end 4, a control unit 5 is arranged, which among other things controls the execution of the service operations.

From the machine end 4 also go from a main power line 6 and two vacuum main lines 7. The main power line 6 is designed centrally for the entire textile machine 1 and branches into a plurality of power lines 8, which supply the devices 3 with electric current. The vacuum main lines 7 are each assigned to a machine half. They branch into several vacuum lines 9, which supply the devices 3 with negative pressure.

If a workstation 2 now requires a service operation, it makes a request to the control unit 5. The control unit 5 checks whether the energy resources allow a pending subsequence of this service operation to be carried out. In contrast, only the machine half of the textile machine 1 is considered for the consumption of negative pressure - due to the separate distribution of the negative pressure via two vacuum main lines 7 - the Job 2, which requested the service operation.

If the energy resources required by the pending subsequence are available, then the control unit 5 instructs the device 3 to perform this subsequence of the service operation.

The following figures show the consumption of energy resources from piecing operations on a spinning machine. This is to serve the illustration of the method according to the invention; the displayed values are freely chosen.

FIG. 2a shows the consumption of electricity of a single piecing process. The time on the x-axis is plotted in certain time units. On the y-axis is the consumption of electricity as Proportion of the available at this spinning machine electric current applied.

How out FIG. 2a As can be seen, the piecing process begins with a thread search (FS), which requires only 5% of the available electrical current and lasts five time units long. The thread search is followed by the start-up (HF) of the spinning station. Startup requires 40% of the available electrical power and lasts for three time units. After a total of eight time units so the piecing process is completed and the job can begin their normal operation.

FIG. 2b shows that too FIG. 2a associated consumption of negative pressure. The labels are the same as in FIG. 2a , except that on the y-axis, the consumption of negative pressure is plotted as a proportion of available at this spinning machine vacuum. How out FIG. 2b As can be seen, 30% of the available vacuum is needed for the thread search. Starting up the workplace does not require a vacuum.

FIGS. 3a and 3b show the consumption of electric current or negative pressure of piecing operations at five jobs according to the conventional method. The designations are the same as in FIGS. 2a or 2b. It is assumed that all five jobs at time zero need a piecing process.

In this example, in the conventional method, the number of piecing operations that can take place simultaneously is limited by the available electric current. Since a piecing process at startup requires 40% of the available electrical current, a maximum of two piecing operations can take place simultaneously.

First, therefore, the piecing process for two jobs is performed. The thread search (FS1 and FS2) is followed by startup (HF1 and HF2) of these jobs. Meanwhile the three other jobs have to wait. If the piecing process for the first two work stations is completed after eight time units, the piecing process begins for the next two work stations. The piecing process again includes the thread search (FS3 and FS4) and the startup (HF3 and HF4) of the jobs. Meanwhile work the first two jobs already in normal operation and the fifth is still waiting. At the time 16 then the third and fourth job are done with the piecing and take the normal operation. Now for the fifth job the piecing process with thread search (FS5) and startup (HF5) can begin. This is completed after a total of 24 time units.

As in FIGS. 3a and 3b can be seen, the available energy resources are not used very well in the conventional method. The accumulated waiting time of the five jobs to the respective normal operation in this example is 72 (= 8 + 8 + 16 + 16 + 24) time units.

In the method according to the invention, which in the FIGS. 4a and 4b is shown, the available energy resources are much better utilized. In the FIGS. 4a and 4b are the same names as in FIGS. 3a or 3b used.

In contrast to the conventional method, interruptions can occur between the individual subsequences in the method according to the invention.

The thread search is limited by the available negative pressure and so in this example three jobs can start with the thread search (FS1, FS2 and FS3). Once the thread search for these three jobs has been completed, the first two jobs can begin to boot (HF1 and HF2). For the start of the third Job is not enough electrical power available. But there are still enough energy resources available so that jobs four and five can already start with the thread search (FS4 and FS5).

At the time of eight, the first two jobs have completed the startup and can start normal operation. Now enough energy resources are again available that job three can start booting up (HF3).

Job four can not start until the time of ten startup (HF4), because only then the thread search has been completed. At this point, Job Five also completed the search. Workstation five, however, has to wait with startup (HF5) until workstation three has completed the startup at time eleven and sufficient electrical power is available again. At the time 13 or 14 then jobs have four or five completed the startup.

With the method according to the invention the energy resources are much better utilized than with the conventional method. The accumulated waiting time of the five workstations to the respective normal operation in this example is only 54 (= 8 + 8 + 11 + 13 + 14) time units, ie 25% less than in the conventional method. With an even higher number of jobs requiring a piecing operation, the savings would be even greater.

Shorter waiting times allow the workstations to resume faster normal operation of the yarn production and increase the productivity of the spinning machine.

The present invention is not limited to the illustrated and described examples and can be modified within the scope of the claims.

Claims (11)

Method for operating a textile machine (1) having a multiplicity of similar work stations (2), - Wherein using the jobs (2) during normal operation of the same yarn produced or rewound from a supply spool to a receiver coil, and - wherein the normal operation at the individual work stations (2) after a stop of the textile machine (1) initiated by a service operation or interrupted at certain intervals by a service operation in the form of a piecing, a sleeve change operation or a yarn joining operation, characterized in that
at least one of said service operations is subdivided into a plurality of subsequences, and that a pending subsequence is performed independently of the remaining subsequences of the corresponding service operation, if the energy resources required for carrying out the pending subsequence are available. Method according to the preceding claim, characterized in that , when the required energy resources of the pending subsequences exceed the available energy resources, the selection of the subsequence to be carried out next takes place such that the productivity of the textile machine (1) is maximized. Method according to one of the preceding claims, characterized in that , when the required energy resources of the pending subsequences exceed the available energy resources, the subsequence associated with the workstation (2) is assigned the fastest and / or works most reliable and / or the fastest and / or most reliable resumes normal operation. Method according to one of the preceding claims, characterized in that the amount of at least one consumed energy resource, a required energy resource and / or an available energy resource is stored in a memory and retrieved by the latter. Method according to one of the preceding claims, characterized in that the amount of at least one consumed energy resource and / or an available energy resource during operation of the textile machine (1) is measured and the resulting measured values for the determination of the required or the available stationary energy resources are used. Method according to one of the preceding claims, characterized in that the energy resources in each case within their natural units of jobs (2) are taken into account. Method according to one of the preceding claims, characterized in that the energy resources comprise electric power, compressed air and / or negative pressure. Method according to one of the preceding claims, characterized in that the partial sequences of piecing process include a thread search process and a job startup process. Method according to one of the preceding claims, characterized in that the subsequences of the sleeve changing operation include a deceleration process, a sleeve exchange process and a job startup process. Method according to one of the preceding claims, characterized in that the partial sequences of the Garnverbindungsvorgangs comprise a thread search operation, a splicing sites and a working run-up process. Textile machine (1) having a multiplicity of similar work stations (2) for producing yarn or for rewinding yarn from a supply reel onto a receiver reel, - Wherein lines (6, 7, 8, 9) are provided for the transport of energy resources, and the workstations (2) having means (3) for performing a piecing operation, a tube changing operation and / or a yarn joining operation, characterized in that
the textile machine (1) has a control unit (5) or is in operative connection with a control unit (5) which is designed to operate the textile machine (1) according to one or more of the preceding claims.

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