CN114959969A

CN114959969A - Method for operating a textile machine and textile machine

Info

Publication number: CN114959969A
Application number: CN202210124245.XA
Authority: CN
Inventors: S·布兰德尔; M·马莱克; 罗宾·维茵
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2021-02-26
Filing date: 2022-02-10
Publication date: 2022-08-30
Also published as: DE102021104676A1; EP4049956B1; EP4049956A1

Abstract

In a method of wiring (12) at a workstation (2) of a textile machine (1), a plurality of sub-steps are performed in succession at the workstation (2) to perform a piecing process, wherein at least one sub-step is performed independently in time from the other sub-steps. The workstation (2) has at least one individually driven working mechanism (3) and at least one positioning drive (22) for the at least one working mechanism (3), and the at least one temporally independently performed sub-step comprises a home-position operation of the at least one positioning drive (22). In a corresponding textile machine (1) having a plurality of workstations (2) of the same type, which are arranged side by side on at least one longitudinal side of the textile machine (1), and at least one control unit (13), the control unit (13) is designed to operate the textile machine (1) according to the method.

Description

Method for operating a textile machine and textile machine

Technical Field

The invention relates to a method for connecting wires at workstations of a textile machine, in which a plurality of substeps are carried out in succession at the workstations for carrying out a piecing process, at least one of the substeps being carried out independently of the other substeps in terms of time. The invention further relates to a corresponding textile machine having a plurality of workstations of the same type arranged side by side on at least one longitudinal side of the textile machine and at least one control unit.

Background

Such textile machines are configured either as spinning machines for producing yarn or as winding machines for winding already produced yarn. The textile machine has a large number of workstations of the same type, which are arranged side by side on one or both longitudinal sides of the textile machine. The workstations of textile machines have a plurality of operating mechanisms for producing or processing a yarn or thread, such as spinning devices, drawing devices and winding devices. Furthermore, the workplace has a working mechanism in order to restore it in case of regular operational interruptions, i.e. to perform service operations such as splicing (splicing or splicing) and replacing spools. Examples of such suction nozzles for thread end finding, blowing nozzles for cleaning purposes, or also working mechanisms for thread treatment can be mentioned.

In order to carry out the joining process, the working mechanism requires a certain amount of energy resources, i.e. electricity, compressed air or negative pressure. However, since the total energy resources available on the textile machine are limited, energy resources can only be provided simultaneously for a certain number of workstations. It is therefore implemented in the prior art that workstations requiring energy resources request them. The control unit allocates the requested energy resource to the workstation as long as the total available energy resource is not exceeded. Conversely, requests by workstations that exceed available energy resources are deferred. This results in that the joining process can usually only be performed simultaneously at one or two workstations. The waiting time of the other workstations is therefore very long until the splicing process can be performed and production can be resumed again. This is disadvantageous, in particular, when the textile machine or the production group of textile machines is started, a plurality of work stations waiting for splices. The splicing process comprises several sub-steps, which are performed sequentially in a workstation. On this basis, DE 102016106107 a1 proposes to divide service operations, e.g. a splice procedure, into subsequences and to request and allocate resources accordingly not for the entire service operation or the entire splice procedure, but only for the respective subsequences. When the energy resources required for executing the sub-sequence are available, the waiting sub-sequence is executed independently of the other sub-sequences of the corresponding service operation. Thus, even if not enough energy resources are available for the entire service operation, the sub-sequence can be processed. For example, during the splicing process, the line finding is performed independently of the workstation that is running. Thus, the energy resources are better utilized and the service operations at the workstation as a whole can be performed faster.

Disclosure of Invention

The object of the invention is to further improve the prior art and to reduce the unproductive downtime of the workstation.

This object is achieved by a method and a textile machine having the features of the independent patent claims.

In a method for splicing threads at a workstation of a textile machine, a plurality of substeps are carried out one after the other at the workstation in order to carry out a splicing process. At least one sub-step is performed independently in time from the other sub-steps. The invention proposes that the workstation has at least one individually driven working mechanism and at least one positioning drive for the at least one working mechanism, and that the at least one temporally independently performed substep comprises an in-situ operation of the at least one positioning drive.

The respective textile machine has a plurality of workstations of the same type arranged side by side on at least one longitudinal side of the textile machine and at least one control unit. In this case, the workstations each have at least one individually driven working mechanism and at least one positioning drive for the at least one working mechanism. The at least one control unit is now designed to operate the textile machine according to the method.

In the context of the present application, a piecing process is understood to mean a piecing process on a spinning machine and a splicing process on a spinning machine or a winding machine. In addition, the jointing process comprises jointing after wire breakage and jointing on an empty pipe by using a sample wire.

In early textile machines, the working members for producing and processing the yarn were usually driven centrally. Also in earlier textile machines, service operations such as the splicing process were performed either manually by an operator or by maintenance devices movable along the work station. In contrast, in the proposed method or the proposed textile machine, the working station has at least one individually driven working member for producing and/or processing the thread and/or for carrying out the joining process driven by the positioning drive. The at least one work member can thus be moved in a targeted manner relative to the workstation in order to carry out the relevant sub-steps of the relevant service operation or joining process and can be positioned precisely for this purpose. To perform the splicing process, the positioning drive must first be moved to its home position.

According to the invention, the in-situ operation of the at least one positioning drive is now carried out independently of the other substeps of the piecing process. The present invention has recognized that the in-situ operation can be performed as a separate sub-step in time, separately from the entire rest of the joining process, before the working components are actually required for the joining process. By running "separately" in situ in time, the cycle time of the actual splicing process can be significantly reduced. For example, by performing the in-situ operation independent in time from the rest of the joint process, a time saving of about 6-8 seconds can be achieved overall. In this case, the in-situ operation can already be carried out on the waiting workstation in preparation before the workstation is arranged for the splice. This is a significant advantage, especially in the case of a large number of starts of multiple jobs.

It is also advantageous, therefore, if the workstation has a plurality of individually driven working mechanisms and a plurality of positioning drives for the plurality of working mechanisms, wherein at least one sub-step which is carried out independently in time comprises a home run of a plurality of positioning drives, preferably all positioning drives.

It is also advantageous if the textile machine is designed as an open-end spinning machine and the further substep, which is carried out independently in time, comprises the preparation of the fiber mat at the relevant workstation. The preparation of the fibre flocks comprises the targeted preparation of the ends of the fibre slivers fed to the spinning station, wherein the feed rollers are driven with a specific motion profile, and the opening rollers are briefly accelerated to comb the fibre flocks. That is, this sub-step can also be separated in time from the entire splicing process, so that about 5-6 seconds can be saved in the remaining splicing process performed later.

It is particularly advantageous if the in-situ operation of the at least one positioning drive is carried out as a first substep of the joining process. This makes it possible to avoid waiting times during the joining process or during the execution of the remaining sub-steps of the joining process due to the necessary in-situ operation of the at least one positioning drive.

It is accordingly also advantageous if the preparation of the fiber mat is carried out as a first sub-step of the piecing process. In this case too, waiting times during a later joining process or during the execution of the remaining sub-steps of the joining process can be avoided.

According to an advantageous embodiment of the invention, at least one sub-step, which is performed independently in time, is already performed when the workstation is switched off. For example, in the case of a rotor spinning machine, when the workstation is closed during pneumatic rotor cleaning, the at least one positioning drive of the workstation can already complete its in-situ operation.

It is also very advantageous if, during and/or after the execution of the sub-steps that are executed independently in time at the workstation, the associated sub-steps that are executed independently in time are executed at least one other workstation. For example, the in-situ operation of the at least one positioning driver and/or the fiber tuft preparation can already be performed on the further workstation during the workstation starting the actual joint cycle. If additional workstations then start the actual or remaining piecing process or perform other sub-steps of the piecing process, the cycle time of the remaining piecing process is significantly reduced. Since the first substep, which is carried out independently of one another in time, can already be carried out in parallel with the joining process of further workstations, a significant time saving can be achieved overall when joining a plurality of workstations.

It is also advantageous if, in the case of a batch splice of several or all workstations of the textile machine, the substeps which are carried out independently in time are carried out simultaneously at a plurality of workstations. Such a batch splice is performed, for example, when the machine is completely shut down overnight. On machines with multiple production groups, batch splicing is also performed when a new production group is started. In particular, the in-situ operation requires only few electrical resources, so that the substeps can be performed simultaneously at a plurality of workstations. In the case of a batch connection, a great time advantage can be achieved here. The fiber cluster preparation also requires only few resources, so that it can also be performed simultaneously at a plurality of workstations.

For example, it is advantageous if, in the case of a textile machine divided into a plurality of sections, when a plurality of work stations of the textile machine are pieced in series, the substeps which are carried out independently in time are carried out simultaneously at all work stations of a section. This is advantageous, for example, when the workstations of a sector are jointly supplied with power resources.

If a plurality of production groups are provided on the textile machine, it is also conceivable, in the case of a plurality of work stations of the textile machine for the purpose of batch splicing, to simultaneously carry out substeps which are independently carried out in time on all work stations of a production group

It is also advantageous if, in the case of a textile machine having two longitudinal sides lying opposite one another, the substeps carried out independently in time are carried out simultaneously on all workstations of at least one longitudinal side of the textile machine, preferably on all workstations of both longitudinal sides of the textile machine, when a plurality or all workstations of the textile machine are pieced in series. Thereby, a particularly large amount of time can be saved with respect to a method in which all sub-steps of a piecing cycle are performed immediately one after the other.

According to an alternative embodiment, it is advantageous if, in the case of a plurality of work stations of a textile machine for the batch joining, the sub-steps which are carried out independently of one another are carried out at a plurality of work stations offset in time, preferably at regular time intervals. Even if the associated sub-steps generally require only few resources, the resources available in the case of sub-steps performed simultaneously on many workstations may be insufficient. Better utilization of resources can thereby be obtained by staggering in time and time can still be saved by separating out at least one independently performed sub-step in time.

For example, it is advantageous if, in the case of a large number of workstations, the home run of a particular drive is carried out continuously, i.e. with a slight delay from one workstation to the other.

Drawings

Further advantages of the invention are described in the following examples. The figures each schematically show:

FIG. 1 shows a front view overview of a textile machine, an

Fig. 2 shows a detail of a workstation of a textile machine in a partially sectioned side view.

Detailed Description

In the following description of the embodiments, identical features or at least features comparable in terms of their design and/or mode of action are provided with the same reference numerals. Furthermore, these are only explained in detail at the time of first-time reference, while in the following exemplary embodiments only the differences from the exemplary embodiments already described are discussed. Furthermore, for the sake of clarity, only one or only a few of the same components or features will generally be labeled.

Fig. 1 shows a textile machine 1 in a schematic front view. The textile machine 1 has a large number of workstations 2 arranged side by side. The workstations 2 are here divided in a manner known per se into structural groups, so-called sectors 19, as indicated by the bold border. In the present case, only the working stations 2 on one longitudinal side 20 of the textile machine 1 are visible. However, the textile machine 1 can also be configured as a double-sided machine, wherein the work stations 2 are also arranged on a longitudinal side 20 opposite the illustrated longitudinal side 20.

Each work station 2 has a plurality of different components and a working mechanism 3 which can be driven by means of a positioning drive 22 (see fig. 2) and with which the wire 12 can be produced or handled or a joining process can be carried out. In the present case, the work stations 2 each have a feed device 6 for feeding the fibrous material 11, a feed-out device 16 for the thread 12 and a winding device 9, by means of which the thread 12 is wound on a spool 10.

In the present example, the textile machine 1 is designed as a rotor spinning machine and accordingly has a feed roller 5 and an opening roller 4 as feed devices. In the present case, the delivery device 16 is designed as a spinning device 7 with a spinning rotor (see fig. 2). In the present case, the produced thread 12 is drawn by the drawing device 8 from the spinning device 7 or the delivery device 16 and fed to the winding device 9, where it is wound onto the bobbin 10.

The winding device 9 contains a traverse-driven thread guide 25 as the operating mechanism 3, which can be driven by means of a positioning drive 22 (see fig. 2). As an alternative to the embodiment embodied as a rotor spinning machine, the textile machine 1 can also be configured as a rotor spinning machine or other spinning machine. The feed device 6 in this case comprises, for example, a drafting system (not shown). The textile machine 1 can also be designed as a winding machine. The feeding device 16 comprises in this case an unwinding spool (not shown).

The list of components and working mechanisms 3 should not be understood as exhaustive. For example, there may be other components and working mechanisms 3 for handling the thread 12, for connecting the thread 12, for cleaning the spinning device 7 or other components of the textile machine 1 or for other activities. The components and working mechanism 3 may include, for example, a mouthpiece, a suction nozzle 21 (see fig. 2), and a movable member. A further working mechanism 3 driven by means of a positioning drive is shown by way of example in fig. 2.

The components and the working mechanism 3 require energy resources, in particular compressed air, negative pressure and electricity, for their operation, which are provided to them in different ways. The supply of underpressure is supplied, for example, via one or more underpressure channels 14, which extend along the workstation 2 and are loaded by an underpressure source 15. The other components and the working mechanism 3 are supplied with compressed air via a compressed air line 17 extending along the work station 2 and a compressed air source 18. Furthermore, a supply line (not shown) for supplying current is provided.

Furthermore, the textile machine 1 has a control unit 13, which overall controls the processes on the textile machine 1. In the present case, each work station 2 also has a control unit 13 which controls the individual work means 3 and is connected to a central control unit 13 of the textile machine. Additionally or alternatively, there can also be one control unit per segment 19.

The working stations 2 of the textile machine 1 are preferably configured to be at least partially self-sufficient. This means that each work station 2 is capable of performing the splicing process at least independently.

If the work stations 2 are designed to be completely self-sufficient, they have a plurality of individually driven components and a plurality of work devices 3 which are driven by means of positioning drives 22 (see fig. 2) for the production line 12. In this textile machine 1 equipped with autonomous workstations 2, it is also possible to divide the workstations 2 into different production groups 28, irrespective of which sections 19 they are divided into. The workstations 2 belonging to a production group 28 are hereby associated: they produce the same product or the same thread 12.

Fig. 2 shows a work station 2 of the textile machine 1 in a schematic side view. The workstation 2 is also designed as a workstation 2 of a rotor spinning machine. However, as mentioned above, the textile machine 1 can also be another spinning machine or a winding machine. In addition to the thread guide 25 already described in connection with fig. 1, a suction nozzle 21, a shut-off valve 27, a thread trap 26 and an exchangeable measuring head 24 are shown in the present case as the operating means 3. All the working mechanisms 3 of the workstation 2 can each be driven individually by means of a positioning drive 22. In contrast, the components of the workstation 2 can be both stationary relative to the textile machine 1 and movable relative to the workstation 2 by means of a drive (not specified). The invention, however, relates only to the working mechanism 3 driven by means of the positioning drive 22.

If the splicing process is to be carried out at the workstation 2, the spool-side line end must be gripped for this purpose and made ready for connection to the output-side line end or fed to the outfeed device 16. This is done by means of the working mechanism 3 driven by means of the positioning drive 22. The piecing process and the function of the working mechanism 3 are explained below by way of example for a workstation 2 of a rotor spinning machine:

after the thread breakage, the thread end on the bobbin side accumulated on the surface of the bobbin 10 is first found out by means of the suction nozzle 21. In this case, the suction nozzle 21 is transferred from the home position to the thread take-up position by its positioning drive 22. Furthermore, the shut-off valve 27 is opened by its positioning drive 22 in order to generate a suction force in the suction nozzle 21. For this purpose, the thread guide 25 is moved by its positioning drive 22, for example, to the edge of its traversing region. Once the thread take-up is complete, the shut-off valve 27 is closed again by the positioning drive 22. Once the thread end is sucked into the suction nozzle 21, it is caught there by the thread trap 26 and is returned directly to the spinning device 7 by it, or is handed over to the outfeed device 16, or is handed over to another working mechanism 3 or another component of the working station 3. To this end, the thread trap 26 is transferred by its positioning drive 22 from its home position shown in solid lines to a delivery position shown in dashed lines. The movement of the thread trap 26 simultaneously inserts the thread 12 into the traversing head 24. For this purpose, the measuring head 24 is moved into the thread receiving position by its positioning drive 22. In the present example, the measuring head 24 has a blowing unit (not shown here, only the connection to the compressed air line 17 is shown here). The thread guide 25 is then moved periodically to the thread receiving position in order to receive a newly attached thread 12. After pick up, the line 12 then resumes its original route as shown at workstation 2.

It goes without saying that the enumeration of the working mechanisms 3 and the joining process are to be understood as examples only, and that further working mechanisms 3 and further processes can be provided on further textile machines 1.

In order to determine their position, the positioning drives 22 must perform a home run for the joining process. According to the prior art, the positioning drive 22 performs a home run once a joining process should be performed at the relevant workstation 2. According to the invention, it is now provided that at least one, preferably a plurality of or even all of the positioning drives 22 perform the in-situ operation temporally independently of the other sub-steps of the joining process, i.e. that the in-situ operation sub-steps are temporally separated from the other sub-steps of the joining process. Thus, the in-situ operation can already be performed, at least in the case of some positioning drives 22, before it is actually needed at the relevant workstation 2. The in-situ operation can thus also be performed simultaneously with other sub-steps at other work stations 2 or simultaneously with the in-situ operation at other work stations 2. The joining process can thus be carried out overall more quickly, which is particularly evident when joining is to be carried out simultaneously or in rapid succession at a plurality of work stations 2.

The same applies to the substep of tuft preparation. The tuft preparation is carried out, for example, at the workstation 2 of the rotor spinning machine within the scope of the piecing process in order to always produce the same spinning conditions. To this end, the feed roller 5 is driven according to a predetermined profile, wherein the tufts are combed for a predetermined period of time. The tufts are then pulled back a predetermined distance by inverting the feed roller 5 for a short period of time, thereby decoupling the action of the opening roller 4. This sub-step can also be separated in time from the other sub-steps of the joining process and can be carried out independently of them in terms of time.

Thus, when the first workstation 2 has started the joining process, the further workstation 2 is already capable of performing the in-situ operation and/or tuft preparation of its one or more positioning drivers 22. The remaining joining processes at the other work station 2 can thus be carried out with much shorter time outlay and, overall, a significant time saving can be achieved. In this way, if, for example, the in-situ operation and the preparation of the tufts have already been carried out in advance, a time saving of up to 15 seconds can be achieved overall in the joining process at the second station. It is also conceivable here to carry out the in-situ operation and the tuft preparation simultaneously.

The invention is not limited to the embodiments shown and described. Modifications within the scope of the patent claims may also be realized, as any combination of the features described, even if they are shown and described in different parts of the specification or claims or in different embodiments, provided that they do not contradict the criteria of the independent claims.

List of reference numerals

1 textile machine

2 working station

3 working mechanism

4 opening roller

5 feeding roller

6 feeding device

7 spinning device

8 drafting device

9 winding device

10 bobbin

11 fibrous material

12 line

13 control unit

14 negative pressure channel

15 negative pressure source

16 delivery device

17 compressed air line

18 compressed air source

19 section

20 longitudinal side

21 suction nozzle

22 positioning driver

23 station controller

24 measuring head

25 wire guide

26 line trap

27 stop valve

28 production group

Claims

1. A method of splicing threads (12) at a workstation (2) of a textile machine (1),

wherein, in order to perform a joining process, a plurality of sub-steps are performed in succession at the workstation (2), wherein at least one sub-step is performed temporally independently of the other sub-steps,

it is characterized in that the preparation method is characterized in that,

the workstation (2) has at least one individually driven working mechanism (3) and at least one positioning drive (22) for the at least one working mechanism (3),

the at least one temporally independently performed sub-step comprises a home run of the at least one positioning drive (22).

2. Method according to the preceding claim, characterized in that the workstation (2) has a plurality of individually driven working mechanisms (3), each having one positioning drive (22), wherein the at least one temporally independently performed sub-step comprises a home run of a plurality of positioning drives (22), preferably all positioning drives (22), of the workstation (2).

3. Method according to any one of the preceding claims, characterized in that the textile machine (1) is configured as an open-end spinning machine and in that a further sub-step, performed independently in time, comprises the preparation of a fibre tuft on the relative work station (2).

4. Method according to any of the preceding claims, characterized in that the in-situ operation of the at least one positioning drive (22) is performed as a first sub-step of the piecing process.

5. Method according to any of the preceding claims, characterized in that the preparation of the fiber mat is performed as a first sub-step of the piecing process.

6. Method according to any of the preceding claims, characterized in that said at least one sub-step performed independently in time has been performed when said workstation (2) is switched off.

7. Method according to any one of the preceding claims, characterized in that, during and/or after the sub-steps performed independently in time at the workstation (2), the related sub-steps performed independently in time are performed at least one other workstation (2).

8. Method according to any one of the preceding claims, characterized in that, in the case of a batch splicing of several or all work stations (2) of the textile machine (1), the sub-steps carried out independently in time are carried out simultaneously on a plurality of work stations (2).

9. Method according to any one of the preceding claims, characterized in that, in the case of a textile machine (1) divided into a plurality of sections (19), the sub-steps performed independently in time are performed simultaneously on all the work stations (2) of a section (19) in the case of a batch piecing of a plurality or all the work stations (2) of the textile machine (1).

10. Method according to any one of the preceding claims, characterized in that, in the case of a textile machine (1) having two opposite longitudinal sides (20), the sub-steps performed independently in time are performed on at least one longitudinal side (20) of the textile machine (1), preferably on all the work stations (2) of both longitudinal sides (20) of the textile machine (1), when a plurality or all the work stations (2) of the textile machine (1) are pieced in series.

11. Method according to any one of the preceding claims, characterized in that the sub-steps performed independently in time are performed on a plurality of work stations (2) staggered in time, preferably at regular time intervals, at a plurality of or all work stations (2) of the textile machine (1) for a batch splice.

12. A textile machine (1) having a number of similar work stations (2) arranged adjacent to one another on at least one longitudinal side of the textile machine (1) and having at least one control unit (13), characterized in that

Each work station (2) has at least one individually driven work means (3) and at least one positioning drive (22) for the at least one work means (3),

and the at least one control unit (13) is designed for operating the textile machine (1) according to the method of any one of claims 1-11.