EP3802926A1 - Verfahren zum ermitteln von eigenschaften eines fasermaterials an einer arbeitsstelle einer textilmaschine und eine textilmaschine - Google Patents
Verfahren zum ermitteln von eigenschaften eines fasermaterials an einer arbeitsstelle einer textilmaschine und eine textilmaschineInfo
- Publication number
- EP3802926A1 EP3802926A1 EP19728369.0A EP19728369A EP3802926A1 EP 3802926 A1 EP3802926 A1 EP 3802926A1 EP 19728369 A EP19728369 A EP 19728369A EP 3802926 A1 EP3802926 A1 EP 3802926A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- load size
- fiber material
- load
- workstation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
- D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
- D01H13/1616—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material characterised by the detector
- D01H13/1625—Electro-mechanical actuators
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/32—Counting, measuring, recording or registering devices
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/42—Control of driving or stopping
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
- D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
- D01H4/12—Rotor bearings; Arrangements for driving or stopping
- D01H4/14—Rotor driven by an electric motor
Definitions
- the present invention relates to a method for determining properties of a fiber material at a workstation of a textile machine, in particular an open-end or air-spinning machine, wherein the textile machine comprises a plurality of workstations, and wherein in each case one workstation has at least one drive, by means of which at least one treatment agent assigned to the drive of the respective workstation is operated for treating the fiber material. Furthermore, the invention relates to a textile machine for carrying out the method for determining properties of a fiber material at a workstation.
- EP 0 289 009 A1 discloses a method and a device for monitoring and maintaining a predetermined yarn quality of a yarn produced by means of a friction spinning device. Therein, a property of the yarn in the form of a mechanical tension of the running yarn is determined and the spinning device is adjusted accordingly by virtue of the property. The disadvantage of this is that the property is determined awkward.
- Object of the present invention is therefore to eliminate the disadvantage of the prior art.
- the object is achieved by a method for determining properties of a fiber material at a workstation of a textile machine and a textile machine for carrying out the method for determining properties of a fiber material with the features of the independent patent claims. Proposed is a method for determining properties of a fiber material at a workstation of a textile machine, wherein the textile machine may be an open-end or air-spinning machine.
- the textile machine further comprises a plurality of workstations to increase the productivity of the textile machine according to the number of workstations.
- One workstation has at least one drive, with the aid of which at least one treatment agent assigned to the drive of the respective workstation is operated to treat the fiber material.
- the treatment agent can be, for example, a dissolving unit which triggers individual fibers from a fiber material in the form of a sliver.
- the treatment agent can also be a spinning rotor at the spinning station, which receives the individual fibers and from this spins a fiber material in the form of a yarn.
- the workstation can furthermore also have a multiplicity of further treatment agents which process the fiber material in a specific shape, for example the sliver, the individual fibers and / or the yarn, forward it, or treat it in some other way.
- the fiber material may be band-shaped on entry into the work site, with the work site subsequently passing through it at least in sections.
- the workplace can treat the fiber material continuously.
- the fiber material can pass through the work site in a processing direction or delivery direction.
- the fiber material can be changed in accordance with the execution of the job in shape, shape or other properties by the treatment by means of the treatment agent.
- at least one property of the fiber material treated with the aid of the treatment agent assigned to the drive is determined.
- the workstation is a spinning station
- the property of the starting fiber material in a can be derived, for example, from at least one load variable of a drive with an associated treatment agent.
- the dissolving unit can be driven more sluggishly by the associated drive than in a reference case in which the fiber material has an intended quality, it can be concluded that the fiber material had a poorer quality before it reached the dissolving unit.
- the detection of a material of the fiber material is possible.
- polyester fibers are significantly harder to process by the opening roller than cotton fibers. It can thus be recognized by means of a change in the load size, whether the right fiber material is present or whether this has been changed.
- the dissolving unit can be driven much more easily by the associated drive than in the reference case, then it can be concluded that the fiber material is missing or vice versa.
- the load size may be, for example, the current consumption of the drive after a first embodiment. This is higher, for example, in the drive of the dissolving unit, if a fiber material is present and is combed out by the opening roller, as if the fiber material is missing and the dissolving unit therefore rotates empty.
- the load size may be, for example, a load angle.
- the load angle can be defined in particular in an electric drive as an angle between a magnetic field of a stator and a magnetic field of a rotor.
- the load size but also be a torque of the drive.
- the load size can also be closed, for example, a load or load that is applied to the drive.
- the load may be proportional to the load angle and / or torque.
- the load acting on the drive can be dependent on the properties of the fiber material. By means of the measurement of the load size, the properties of the fiber material can thus be determined, from which in turn qualitative statements about the fiber material can be made.
- the load angle is measured as a load size, it brings advantages.
- the load angle can be determined, for example, by means of a measurement of a profile of a current intensity and / or a profile of the voltage of the electric drive. It can be determined in particular by a driver circuit which is already present in the control of the drive. This makes it possible to dispense with an additional sensor for detecting the load size in the form of the load angle.
- the measurement of the load size, in particular of the load angle and / or the torque can consequently take place sensorless.
- the property of the fiber material in the form of a stress, a thickness, a density, a tensile strength, an E modulus and / or a type of the fiber material is determined on the basis of the measurement of the load size.
- the thickness for example, thick and / or thin areas in the fiber material can be recognized which have a quality act of the fiber material can affect.
- a fiber material with a constant thickness is desired.
- the tensile strength and / or the modulus of elasticity are, for example, important properties in order to ensure the stability of the fiber material. Since, for example, a thicker fiber material loads the drive more than a thinner fiber material, the load size also changes accordingly. On the basis of the load size and / or the change in the load size can therefore be concluded that the thickness and / or a change in thickness of the fiber material.
- the load size is measured at least on the drive which is assigned to the treatment agent in the form of a dissolving unit, a spinning rotor, a traversing device, a take-off roller pair and / or a winding roller.
- the drive (s) of the associated treatment agent (s) are stopped. If the drive is the drive of a disassembly unit, the drive of both the disassembly unit and the feed unit of the spinning station can be stopped, for example, if there is no fiber material. As a result, a useless piecing can be avoided. In addition, excessive wear of the idle treatment agent, in particular the feed roller can be avoided.
- parameters for controlling the drives are adapted.
- parameters for controlling the treatment means can also be adapted. If, for example, it is determined as a property of the fiber material that the fiber material is too thin, a drive can be used and / or a treatment agent are controlled such that the fiber material is formed thicker. For example, this problem can occur on the spinning rotor of the spinning station. If the spinning rotor forms a fiber material in the form of the yarn which is too thin, the spinning rotor and / or the drive of the spinning rotor can be controlled in such a way that the yarn is made thicker.
- the amount of individual fibers supplied by the dissolving unit per unit time can be increased.
- the dissolution unit can be controlled accordingly.
- a drive associated with the dissolving unit and / or a drive which drives a fiber feed unit transporting the fiber material to the opening roller can be operated at a higher power, in particular at a higher speed or speed, by the higher number to be able to make available to individual fibers.
- a load size profile is created from the measurement of the load size.
- the load size can be plotted against time in a time interval.
- a load size profile which describes the load variable course in a comparatively small time interval, for example a few seconds, it is possible, for example, to detect changes in the properties of the fiber material which occur relatively abruptly.
- a thin and / or thick spot in the fiber material can be recognized, which extends over a limited section of the band-shaped fiber material.
- changes in the thickness of the fiber material such as those which occur, for example, at the transition points between the thin places, the thick areas and the areas of a predetermined thickness of the fiber material, can be detected.
- a fracture of the fiber material can also be determined as this causes an abrupt change in the load size.
- at least one reference value preferably a reference profile
- the reference value or the reference profile can be created, for example, at a time or within a period in which the fiber material has properties which correspond to the preferred properties of the fiber material.
- the preferred properties can be defined for example by quality specifications.
- the preferred properties of the fiber material, which correspond to the quality specifications for the fiber material are present in the form of the reference value or reference profile.
- the reference value or the reference profile can also be created for at least one operating state of the respective treatment agent.
- a value of the load size can be created during the regular combing process or even during idling without combing out.
- the reference value or the reference profile can be stored, for example, in a controller in order to be able to use it at a later time.
- the reference value or the reference profile can be compared with the current value of the load variable or the current load size profile.
- deviations between the current value of the load variable or the current load size profile and that of the reference value or reference profile can be determined.
- the properties and / or deviations of the properties of the fiber material can be determined.
- the lack of fiber material can be determined in a particularly reliable manner since normal fluctuations of the load size, which can also be relatively large due to various circumstances, can not lead to erroneous assessments.
- the load size of a drive of a first workstation is the same as the load size of the corresponding drive of a second workstation. job is compared. Additionally or alternatively, the load size profile of the drive of the first workstation can be compared with the load size profile of the corresponding drive of the second workstation.
- a difference between the properties of the fiber materials between the two jobs can be determined. For example, it can be recognized that the fiber material in the first work site has a greater thickness than in the second work site, since the load size or the load size profile has a different size or a different course. As a result, a difference in the type of fiber material between the two jobs can be detected. As a result, it can be recognized, for example, that natural fibers and other synthetic fibers are processed in one workstation. This can be determined, for example, on the basis of a difference between the load variables and / or load size profiles of the drives of the two workstations. The type of fiber material can also be recognized, for example, by comparing the load size and / or the load size profile with a reference profile that has been recorded with a specific type of fiber material.
- the load size of at least one first drive of a workstation is compared with a load size of a second drive of the same workstation.
- the load size profile of the at least one first drive can be compared with the load size profile of the second drive of the same workstation.
- the two drives whose load sizes and / or load size profiles are compared with one another can be arranged one behind the other in the machining direction of the fiber material, in particular directly. As a result, a change in the properties of the fiber material within the workstation can be determined.
- the load variables and / or load size profiles of the two drives of the workstation can be compared with the respective reference profiles of the corresponding drives. From this, it can be determined whether the changes in the properties of the fiber material can be attributed to changes in the properties of the fiber material occurring in any case during the processing of the workstation or if the changes in the properties of the fiber material occur unpredictably, which may be due to a treatment agent has an error or works incorrectly and / or that the fiber material has an error.
- the load size of a drive is evaluated statistically, this also brings advantages. Additionally or alternatively, it is advantageous if the load size profile is evaluated statistically. For example, it can be concluded from a continuous, in particular continuous, change of the load size and / or the load size profile to a change in the thickness of the fiber material. It can thus be determined, for example, a slope (positive or negative) over time. For example, a standard deviation, a variance and / or a statistical distribution, in particular a Gaussian distribution, of the load size can be evaluated. From this, the properties of the fiber material can be determined, such as a deviation of the thickness of the fiber material from the intended thickness of the fiber material.
- an average of the load size is determined.
- the mean value of the load size profile can also be determined.
- an average thickness of the fiber material can be determined.
- a time average can be determined.
- a limit value of the load size is undershot, this can be an indication that the thickness of the fiber material has fallen below a just allowable thickness, if the limit value has been selected accordingly, or that the fiber material has leaked or broken. Since the load size is related to the load that acts on the drive of the treatment agent, a decrease in the load applied to the drive occurs as a result of the decrease in the load size. A fiber material, which has a smaller thickness, less load on the drive, so that the thickness or the thickness decrease is recognized as a property of the fiber material. If the determined thickness falls below the limit, which may be defined as a function of quality requirements for the fiber material, the quality of the fiber material may no longer be sufficient.
- a textile machine which may be an open-end or air-spinning machine.
- the textile machine comprises a large number of jobs.
- the jobs each have at least one drive, by means of which at least one treatment means associated with the drive of the respec conditions workstation for treating a fiber material is operable.
- the treatment agent can be, for example, a dissolving unit which triggers individual fibers (which are likewise a fiber material) from a fiber material in the form of a sliver.
- the treatment agent can also be a spinning rotor of the spinning station, which receives the individual fibers and from which spins a fiber material in the form of a yarn.
- the treatment agents are the aids of the workstation, with the aid of which the fiber material can be brought from an initial state into a final state.
- the treatment agents may additionally or alternatively redirect or redirect the fiber material without changing the shape of the fiber material.
- the treatment agent may be, for example, a drafting device for a fiber strip or a drafting roller thereof or a pair of take-off rollers for the yarn produced with the aid of the air-spinning nozzle.
- the textile machine comprises at least one controller with which the respective drive can be controlled.
- a controller may also be assigned to a workstation and / or a plurality of workstations.
- the controller may further comprise a memory unit, a computing unit and / or at least one interface.
- the interface can be used to establish a connection for controlling the drive.
- the controller can also determine a load size of the drive via the interface. For example, the controller can determine a current, a voltage and / or their courses and calculate the load size therefrom.
- the controller is configured to operate the textile machine according to a method in accordance with at least one of the features mentioned in the preceding and / or following description. Further advantages of the invention are described in the following exemplary embodiments. Show it:
- Figure 1 is a schematic side view of a job
- Figure 2a - c schematic cross section of a drive with stator and rotor
- Figure 3 is a schematic front view of a textile machine with two jobs
- FIG. 4 shows a schematic illustration of a reference profile on the example of a dissolution unit.
- FIG. 1 shows a schematic side view of a workstation 1 of a textile machine 18.
- the textile machine 18 may comprise a multiplicity of workstations 1 in order to increase a productivity of the textile machine corresponding to the number of workstations 1.
- the workstation 1 is formed in the present embodiment as a spinning station.
- the spinning station can receive a fiber material and produce a yarn 2.
- the workstation 1 shown in FIG. 1 produces the yarn 2 from a sliver 3.
- the yarn 2 passes through the workstation 1 in a delivery direction LR and can be wound onto a spool 9.
- the workstation 1 of the present exemplary embodiment has as a treatment means a dissolving unit 4, which triggers a fiber material in the form of individual fibers 16 out of the sliver 3.
- the individual fibers 16 are guided to a spinning rotor 5, which produces the yarn 2 from the individual fibers 16.
- the spinning rotor 5 is arranged in a spin box 17 in the present embodiment.
- the yarn 2 formed by the spinning rotor 5 is withdrawn from the spinning frame 17 by the spinning rotor 5 with the aid of a take-off roller pair 7, wherein the yarn 2 can still pass a first traversing device 6, which changes the yarn 2.
- the workstation 1 has a deflection unit 8, which deflects the yarn 2 to the reel 9, on which it is wound up.
- the spool 9 can be driven by a winding roller 10, which bears against the spool 9 and drives the spool 9 via friction between the spool 9 and the spooling roller 10.
- a thread monitor 19 by means of which a presence of the yarn 2 can be monitored, is arranged between the take-off roller pair 7 and the deflection unit 8.
- the deflection unit 8 is followed by a second traversing device 20 in the delivery direction LR, by means of which the yarn 2 can be oscillated back and forth, so that the yarn 2 can be wound in a region on the spool 9.
- the first and the second traversing device 6, 20 can change the yarn 2 laterally relative to the delivery direction LR.
- the dissolving unit 4, the spinning rotor 5, the first traversing device 6, the pair of take-off rollers 7, the deflection unit 8, the spool 9, the winding roller 10, the thread monitor 19 and / or the second traversing device 20 are according to the present embodiment treatment means with which the fiber material is processed and / or treated in the workstation 1.
- the dissolution unit 4 changes a shape of the fiber material.
- the dissolution unit 4 triggers from a sliver 3 individual fibers 16.
- the spinning rotor 5 can process the individual fibers 16 into a yarn 2.
- the traversing devices 6, 20 move the yarn 2 back and forth between two end positions.
- the take-off roller pair 7 transports the yarn 2 in the delivery direction LR.
- the workstation 1 has at least one drive 1 1.
- the workstation 1 has a plurality of drives 11a-11f, wherein the treatment means, according to the present embodiment, the opening unit 4, the spinning rotor 5, the first Changer worn 6, the take-off roller pair 7, the winding roller 10 and the second traversing device 20 are, in each case a drive 1 1 a - 1 1f (the drive 1 1 f the second traversing device 20 is shown in Figure 3) is assigned.
- the first traversing device 6 and / or the second traversing device 20 does not necessarily have to be present.
- the treatment means 4, 5, 6, 7, 10, 20 can thus be used individually and independently of each other with the aid of the assigned Neten drives 1 1 a - 1 1f be driven. Additionally or alternatively, a drive 1 1 can drive two treatment agents.
- the workstation 1 can advantageously have a controller 12, which can be connected to the at least one drive 11a-11f by means of a connection, not shown here, in order to control it and thereby to be able to carry out the production process of the yarn 2 ,
- the properties of the fiber material treated by a treatment agent 4, 5, 6, 7, 8, 9, 10, 19, 20 can be determined on the basis of a measurement of a load size of at least one drive 11a-1f. Additionally or alternatively, the properties of the fiber material can also be determined, which is currently treated with a treatment agent 4, 5, 6, 7, 8, 9, 10, 19, 20.
- the load variable may be, for example, a load angle a and / or a torque of the drive 11a-11f.
- the load size may depend on the load applied to the drive 1 1 a-1 1 f.
- the load bearing on the drive 1 1 a-1 1 f may in turn depend on how sluggish the fiber material is on the drive 1 1 a - 1 1f or on the drive means 1 1 a - 1 1f driven treatment means 4, 5, 6, 7, 8, 9, 10,
- the drive 11a-1 1f is loaded to a higher level than if the fiber material had a smaller thickness. The same applies if the fiber material has a higher weight or a higher weight per length. Then the drive 11a-11f, which drives the treatment means 4, 5, 6, 7, 8, 9, 10, 19, 20 used to treat the fiber material, is subjected to a higher load. On the basis of the load size and / or variables derived therefrom, such as, for example, a load size profile, the properties of the fiber material can be determined.
- the load angle a is explained as an example of a load size.
- the load angle ⁇ is defined as the angle between a stator field and a rotor field N - S of an electric motor.
- 11 f can thus be electric drives, in particular electric motors.
- FIGS. 2a-c show schematic cross-sections of an electric drive 11 with a stator 13 and a rotor 14.
- the rotor 14 is rotatable about an axis of rotation 15.
- the stator 13 forms the stator field N - S, which is formed in the stator 13 by way of example.
- the rotor 14 further forms, at least during operation of the drive 11, the rotor field N '- S', which is formed here by way of example between the north pole N 'of the rotor field N' - S 'and the south pole S' of the rotor field N '- S'.
- the two fields N '- S', N - S influence each other, so that the drive 11 a treatment means 4, 5, 6, 7, 8, 9, 10, 19,
- the north pole N and the south pole S of the stator field N - S can rotate in the direction of rotation DR1 during operation of the drive 11.
- the north pole N and the south pole S are always arranged offset by 180 ° to each other according to this embodiment, so that they always move identically in the same direction of rotation DR1.
- the same reference symbol DR1 is assigned.
- the rotor 14 Due to a magnetic force F between the stator field N - S and the rotor field N '- S', the rotor 14 can also be rotated by means of a generated rotation of the stator field N - S in the direction of rotation DR1.
- the magnetic force F is formed between the south pole S and the north pole N 'and the north pole N and the south pole S'.
- the rotor 14 then rotates in the direction of rotation DR2.
- the south pole S of the stator field N - S arranged in the upper section of the stator 13 in FIG. 2a rotates in the direction of rotation DR1
- the north pole N draws the south pole S 'of the rotor field N' - S 'due to the magnetic force F, so that the rotor 14 is again in the direction of rotation DR2 rotates.
- the direction of rotation DR1 and the direction of rotation DR2 are always the same orientation in a normal operation of the drive 11.
- the load angle ⁇ between the stator field N - S and the rotor field N '- S' is 0 °, since the south pole S and the north pole N 'and the north pole N and the south pole S' do not offset each other angularly are. This is the case during operation of the drive 11 when the drive 11 is unloaded. Without load, the rotor 14 can always follow the rotating stator field N - S.
- FIG. 2b shows an example in which the drive 11 is loaded. On the drive 11 thus acts a load.
- the north pole N and the south pole S of the stator field N - S are rotated further relative to FIG. 2a.
- the stator field N - S leads the rotor field N '- S' ahead. Since a load acts on the rotor 14, this inhibits the rotation of the rotor 14.
- the load brakes the rotor 14.
- the stator field N-S leads the rotor field N'-S ', so that the load angle a now lies in the region of approximately 45 ° is.
- the load angle a of approximately 45 ° also causes the magnetic force F and the rotor 14 to be at an angle to one another, so that due to the lever law, a torque acts on the rotor 14 due to the magnetic force F.
- the drive 11 can move the load applied to it.
- Figure 2c shows an embodiment in which the load angle a is about 90 °.
- the stator field N - S leads the rotor field N '- S' further in relation to FIG. 2b.
- the load acting on the drive 11 here is greater than the load in FIG. 2b.
- a ma ximales torque are transmitted to the rotor 14.
- the load angle a of 90 ° there is the risk that the drive 1 1 tilts when the load angle a is greater than 90 °.
- the drive 1 1 can be left standing, so that the workstation 1 can be put out of operation as a result.
- the properties of the fiber material can be determined.
- the load angle a also depends on the load with which the drive 1 1 is applied. By means of the measurement of the load angle a can thus be concluded that the load is applied to the drive 1 1 and / or the treatment means 4, 5, 6, 7, 10, 20. Based on the load and / or a temporal course of the load, the properties of the fiber material can be determined.
- the fiber material in the form of the yarn 2 in the delivery direction LR after the spinning rotor 5 of FIG. 1 can have a thin location which extends over a section along the yarn 2. It also follows from the thin spot that in the region of the thin spot the yarn 2 has a lower weight. Since the take-off roller pair 7 pulls the yarn 2 out of the spinning rotor 5, the thin point between the take-off roller pair 7 will also pass. As a result of the thin point and the thus reduced weight of the yarn 2, the drive 1 1 d of the take-off roller pair 7 is less loaded for the period in which the thin point is arranged between the pair of delivery rollers 7.
- the load size will change, according to the example that the drive 1 1 d is an electric drive, the load angle a.
- the load angle a will also decrease according to the load of the drive 1 1 d. From the measurement of the load size in the form of the load angle a, the properties, here the thickness, of the fiber material, here the yarn 2, can be recognized.
- a load size profile is created from the measurement of the load size.
- that one Thin point is arranged in the yarn 2, for example, the length of the thin point along the yarn 2 can be determined using the load size profile.
- the load size profile will have a lower level as long as the thin point is arranged between the pair of take-off rollers 7. By means of a delivery speed of the yarn 2 and the time at which the load size profile has a lower level, the length of the thin point along the yarn 2 can be determined.
- a reference profile of the load size of at least one drive 1 1 a-1 1 f is created from the measurement of the load variable.
- the reference profile can then be compared with a load size profile that is recorded during the operation of the workstation 1.
- the load size profile can be steadily recorded over a time interval.
- the load size profile may include changes in the load size and / or the sizes of the load sizes.
- the load size profile can also be statistically evaluated.
- the load size profile 23 comprises the progression of the current intensity I of a drive, in this case, for example, the drive 11a (see FIG. 1) of the dissolution unit 4, over time t a piecing process.
- a first time ti which marks the start of piecing at a workstation 1
- the current consumption of the drive 1 1 a first increases from 0 to a first value Io.
- the drive of the dissolving unit rotates, but is not yet burdened by a sliver 3.
- the value Io denotes the current consumption of the idle drive 1 1 a, ie without fiber material.
- the fiber feed is now started. Since the drive 1 1 a is now loaded by combing out the fed fiber sliver 3, the current consumption of the drive 1 1 a increases accordingly from the value Io to the value l s of the loaded drive 1 1 a, which during the further spinning process more or less constant. If the characteristic current increase from the value Io to the value l s is now missing, it is concluded that the sliver 3 is missing and the further fiber feed is stopped at the time t 3 or the piecing is interrupted. A sensor for detecting the tape original at the workstation 1 is therefore not required. In this case, the current consumption of the drive 11 a di di rectly measured. However, it is particularly advantageous if the current consumption is measured or recorded only indirectly by detecting a quantity related to the current consumption, such as the load angle ⁇ described above.
- the load size profile 23 shown above can be stored as a reference profile and carried out a constant comparison with the currently measured load size.
- deviations of the current load size profile 23 can be detected by the reference profile.
- the current consumption or the load size Due to the characteristic increase in the current consumption or the load size, however, it is sufficient to detect the currently measured value of the load variable, in this case the current consumption L of the loaded drive 11 a, and preferably to compare it with a reference value 21. Since the current consumption l s at various workstations 1 and under various circumstances such as different materials, different wear conditions, bearing friction or different sets, but may be subject to strong fluctuations, in the present case, the value Io the current consumption of idle drive the same job 1 used as a reference value 21. If the currently measured value of the load size 22 is above the previously determined reference value 21 after the start of the fiber feed or during the spinning operation, then it is assumed that the sliver 3 is present and the piecing or the regular spinning process is continued. If, on the other hand, it is determined that the value of the load variable 22 is equal to the previously determined reference value 21, then from the absence of the sliver 3 closed and the piecing off or broke in the case of a current job 1 the relevant job 1 stopped.
- the fiber band recognition is not carried out as described above until after the start of the piecing process, but already takes place during the pre-feeding. It is customary on spinning machines to supply sliver to the dissolving unit for a short time before starting the piecing process and to dissolve it initially without piecing. Subsequently, the fiber feed is stopped and the sliver pulled back by the feed roller a distance from the opening roller. The dissolved fibers are removed from the spinning chamber before piecing. This serves to provide the sliver end in reproducible quality for the piecing process. If the absence of the fiber sliver is already determined during the pre-feeding, then useless piecing attempts can be avoided in a particularly effi cient manner.
- the piecing process is not stopped immediately if the absence of the sliver 3 is detected during the initial feeding. Rather, at least some of the actual piecing, that is to say the returning of the thread end into the spinning rotor 5 or into a fiber collecting groove of the spinning rotor 5, is still carried out. These include in particular the cutting to length and preparation of a coil-side thread end for piecing. In this way, production can be resumed more quickly at workstation 1 as soon as a sliver 3 is present again, since then only the thread end has to be dropped for piecing.
- FIG. 3 shows a textile machine 18 with at least two work stations 1, T in a front view.
- the two workstations 1, T have the same features with one another and with respect to FIG. 1, so that they are of simplicity half not be explained again.
- the elements are provided with primed reference numerals.
- the two work stations 1, 1 ' also have the schematically illustrated second traversing device 20, 20', which can be driven by the respective drives 11, 11 f. With the help of the second traversing device 20, 20 ', the respective yarns 2, 2' on the spool can be moved back and forth.
- the load size of a drive 11a-11f of the first workstation 1 can be compared with the load size of the corresponding drive 11a'-11f of the second workstation 1 '.
- the load size of a drive 11a-11f of the first workstation 1 can be compared with the load size of the corresponding drive 11a'-11f of the second workstation 1 '.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018112801.0A DE102018112801A1 (de) | 2018-05-29 | 2018-05-29 | Verfahren zum Ermitteln von Eigenschaften eines Fasermaterials an einer Arbeitsstelle einer Textilmaschine und eine Textilmaschine |
| PCT/EP2019/063812 WO2019229059A1 (de) | 2018-05-29 | 2019-05-28 | Verfahren zum ermitteln von eigenschaften eines fasermaterials an einer arbeitsstelle einer textilmaschine und eine textilmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3802926A1 true EP3802926A1 (de) | 2021-04-14 |
| EP3802926B1 EP3802926B1 (de) | 2023-08-16 |
Family
ID=66752077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19728369.0A Active EP3802926B1 (de) | 2018-05-29 | 2019-05-28 | Verfahren zum ermitteln von eigenschaften eines fasermaterials an einer arbeitsstelle einer textilmaschine und eine textilmaschine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3802926B1 (de) |
| CN (1) | CN112313371B (de) |
| DE (1) | DE102018112801A1 (de) |
| WO (1) | WO2019229059A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4375404A1 (de) | 2022-11-22 | 2024-05-29 | Maschinenfabrik Rieter AG | Verfahren und vorrichtung zum detektieren des vorhandenseins eines faserbandes am eingang einer textilmaschine |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2644749A1 (de) * | 1976-10-04 | 1978-04-06 | Zinser Textilmaschinen Gmbh | Offen-end-spinnmaschine |
| GB8527002D0 (en) * | 1985-11-01 | 1985-12-04 | Hollingsworth Uk Ltd | Open-end spinner piecing method |
| IN171021B (de) | 1987-04-27 | 1992-07-04 | Rieter Ag Maschf | |
| JP2646727B2 (ja) * | 1989-01-31 | 1997-08-27 | 株式会社島津製作所 | 糸条の巻取装置 |
| DE4118829C2 (de) * | 1991-06-07 | 1993-11-18 | Zinser Textilmaschinen Gmbh | Verfahren zum Betrieb einer Spinnereimaschine und Vorrichtung zur Durchführung des Verfahrens |
| DE4228300A1 (de) * | 1992-08-26 | 1994-03-03 | Rieter Ag Maschf | Verfahren und Vorrichtung zur Überwachung von Spinnstellen |
| DE69904771T2 (de) * | 1998-03-27 | 2003-10-23 | Murata Kikai K.K., Kyoto | Mehrfach-Zwirnmaschine mit Einzelspindelantrieb |
| DE102004004517A1 (de) * | 2004-01-23 | 2005-08-11 | Wilhelm Stahlecker Gmbh | Verfahren zum Vermeiden von Fehlverzügen an einem zu verstreckenden Stapelfaserverband |
| DE102004017700A1 (de) * | 2004-04-10 | 2005-10-27 | Saurer Gmbh & Co. Kg | Offenend-Rotorspinnvorrichtung |
| DE102004053505A1 (de) * | 2004-11-02 | 2006-05-04 | Wilhelm Stahlecker Gmbh | Verfahren zum Optimieren der Produktionsleistung einer Spinnmaschine |
| DE102005029937B4 (de) * | 2005-06-28 | 2014-02-20 | Saurer Germany Gmbh & Co. Kg | Verfahren zur Ermittlung der Qualitätsparameter eines Fadens |
| DE102007032237A1 (de) * | 2007-07-11 | 2009-01-15 | Rieter Ingolstadt Gmbh | Textilmaschine |
| DE102007057920A1 (de) * | 2007-12-01 | 2009-06-04 | Oerlikon Textile Gmbh & Co. Kg | Verfahren zur Diagnose von Spinnbedingungen an einer Spinnstelle einer Offenend-Rotorspinnmaschine sowie Sensoreinrichtung |
| DE102008003711A1 (de) * | 2008-01-09 | 2009-07-16 | Oerlikon Textile Gmbh & Co. Kg | Verfahren zum Betreiben einer Arbeitsstelle einer semiautomatischen Offenend-Spinnmaschine bzw. Arbeitsstelle zur Durchführung des Verfahrens |
| CN101602449B (zh) * | 2009-06-17 | 2012-02-01 | 山东同济机电有限公司 | 纱线张力在线检测和实时控制装置 |
| JP5471924B2 (ja) * | 2010-07-15 | 2014-04-16 | 村田機械株式会社 | 糸巻取装置 |
| CN102864537B (zh) * | 2012-01-05 | 2014-09-17 | 杭州电子科技大学 | 一种集清纱与断纱检测一体的可编程化的控制器实现方法 |
| DE102012102695A1 (de) * | 2012-03-29 | 2013-10-02 | Maschinenfabrik Rieter Ag | Vorspinnmaschine mit einer Anordnung zur Detektion und Entfernung von Garnfehlern |
| CN205420654U (zh) * | 2015-12-14 | 2016-08-03 | 江南大学 | 一种低功耗的纱线在线监测装置 |
-
2018
- 2018-05-29 DE DE102018112801.0A patent/DE102018112801A1/de not_active Withdrawn
-
2019
- 2019-05-28 CN CN201980032643.5A patent/CN112313371B/zh not_active Expired - Fee Related
- 2019-05-28 EP EP19728369.0A patent/EP3802926B1/de active Active
- 2019-05-28 WO PCT/EP2019/063812 patent/WO2019229059A1/de not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4375404A1 (de) | 2022-11-22 | 2024-05-29 | Maschinenfabrik Rieter AG | Verfahren und vorrichtung zum detektieren des vorhandenseins eines faserbandes am eingang einer textilmaschine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3802926B1 (de) | 2023-08-16 |
| DE102018112801A1 (de) | 2019-12-05 |
| CN112313371A (zh) | 2021-02-02 |
| CN112313371B (zh) | 2023-03-10 |
| WO2019229059A1 (de) | 2019-12-05 |
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