EP3170779B1 - Verfahren zur steuerung der fadenlieferung mindestens eines fadenliefergerätes und textilmaschine mit einem system mit mindestens einem fadenliefergerät - Google Patents

Verfahren zur steuerung der fadenlieferung mindestens eines fadenliefergerätes und textilmaschine mit einem system mit mindestens einem fadenliefergerät Download PDF

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Publication number
EP3170779B1
EP3170779B1 EP16195946.5A EP16195946A EP3170779B1 EP 3170779 B1 EP3170779 B1 EP 3170779B1 EP 16195946 A EP16195946 A EP 16195946A EP 3170779 B1 EP3170779 B1 EP 3170779B1
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EP
European Patent Office
Prior art keywords
thread
value
tension
unit
braking
Prior art date
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Active
Application number
EP16195946.5A
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German (de)
English (en)
French (fr)
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EP3170779A1 (de
Inventor
Bernd Günter
Sascha Schleeh
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Memminger IRO GmbH
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Memminger IRO GmbH
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Publication of EP3170779A1 publication Critical patent/EP3170779A1/de
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/44—Tensioning devices for individual threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/04—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to excessive tension or irregular operation of apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/40—Applications of tension indicators
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • D04B15/484—Yarn braking means acting on the drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a method for controlling the yarn delivery of at least one yarn feeding device and a textile machine according to the preamble of the independent claims.
  • the invention relates to yarn delivery by yarn feeding devices with a storage body, d. H. by storage yarn feeding devices, wherein the yarn is withdrawn respectively by the textile machine from the storage body.
  • the thread tension is regulated by a braking device and by a thread tension unit to a reference value of the thread tension.
  • a thread tension measuring unit determines measured values of the thread tension and in each case minimizes a difference between a measured value and the reference value, as in EP 2 014 809 A1 specified.
  • yarn tension measuring units also called yarn tension sensors
  • the sensor is adjusted, ie. H. a zero point determination, with the thread standing.
  • EP 0 943 713 B1 is z. B. a multiple lifting of the thread from the sensor described. From the EP 2 067 886 A1 is a forward rotation of a yarn feed wheel of the yarn feeding device for determining the zero point known.
  • Thread tension sensors are also used for winding and rewinding. From the EP 0 406 735 B1 It is known to record the measured value of the sensor at each interruption of the winding process and use it as a new zero point.
  • the yarn tension sensor in the present invention is used to control the yarn tension of a yarn withdrawn from a storage yarn feeding apparatus, it is apparent from the above-mentioned.
  • ITMI00 2007 22 69 A known forward turning of a yarn feeder can not be used.
  • the object of the invention is to develop a determination of the zero point of the yarn tension measuring unit for a yarn tension-controlled yarn delivery of a storage yarn feeding device.
  • the yarn is withdrawn through the textile machine from a storage body of the yarn feeding device, wherein the yarn tension is regulated.
  • the thread tension is adjusted by a braking device with at least one brake body in the thread path after the storage body and with an adjustment.
  • at least one adjusting element of the adjusting device is controlled by a brake signal that it acts on the one or more brake elements.
  • the thread tension is set by a thread tension unit to a reference value.
  • measured values of the thread tension are determined by a tension measuring unit and in each case a difference between a measured value and the reference value is minimized.
  • a brake release is carried out with at least one discharge cycle when the thread is stationary by a determination unit of the thread tension unit.
  • the brake signal is shifted from an initial value to one, e.g. lowest, value at which the brake body or bodies are completely relieved, and changed back to its initial value.
  • the value which a measuring device of the voltage measuring unit determines at this value of the brake signal during the last unloading cycle is used to determine the zero point of the voltage measuring unit.
  • At least one actuating element is driven by the output value of the brake signal. Accordingly, to relieve the actuator is controlled by a modified brake signal, for example by the lowest Value of the brake signal, so that no influence of the actuator takes place on the brake body.
  • a modified brake signal for example by the lowest Value of the brake signal, so that no influence of the actuator takes place on the brake body.
  • the braking device has a trained as a cone brake body.
  • the brake body is arranged at the lower end of the storage body. There is a risk that the brake body jammed when relieved by a slight axial skew. A loading and unloading of the brake body centers the brake body and releases the jamming. This enables a reliable determination of the zero point of the voltage measuring unit.
  • a value in the middle range of the total range of the values of the brake signal is selected as the output value of the brake signal.
  • a relief cycle is performed within a time of 0.1 to 2 seconds.
  • a pause of 20 to 200 ms is provided between two unload cycles.
  • the determination of the zero point for the tension measuring units of multiple yarn feeding devices is carried out in parallel.
  • the determination of the zero point in the yarn feeding devices is started by the central control unit.
  • a preparatory run is performed prior to brake unloading.
  • the textile machine is put into operation for a certain operating time and a yarn tension operating value is specified.
  • the yarn tension operating value is predetermined by the central control device.
  • a delay of 0.1 to 2 seconds is provided. During the delay, the thread can calm down.
  • the adjusting elements are designed as magnetic elements, wherein a magnetic element in the magnetic field of the other magnetic element is movable and on the or the brake body acts.
  • the thread tension is adjusted by one of the two magnetic elements, which is designed as a working coil is driven by the working current. That is, the brake signal is the operating coil driving the working coil.
  • a textile machine comprises at least one yarn feeding device whose yarn tension unit has a determination unit for determining the zero point of the tension measuring unit while the yarn is stationary.
  • the determination unit is configured to perform a brake release with at least one release cycle, wherein at each release cycle the brake signal is changed back from an initial value to a value at which the brake body or bodies are completely relieved and back to the initial value.
  • a value of a measuring device of the voltage measuring unit which is measured at this value of the brake signal during the last unloading cycle, is used to determine the zero point.
  • the textile machine comprises a system comprising the yarn feeding devices and a central control unit.
  • the central control unit is connected to the transfer of nominal values of the thread tension to the yarn feeding devices of the system.
  • the central control unit is designed to start in each case the brake release of the yarn feeding devices.
  • the central control device transmits to the yarn feeding devices in parallel or serially a signal for zero point determination.
  • the central controller is configured to provide a yarn tension operating value during a preparatory run that is performed prior to brake unloading and during which the textile machine is put into operation for a particular operating period.
  • a textile machine has a system with at least one yarn feeding device 1 for controlling the delivery of a thread 40 to the textile machine.
  • the yarn feeding device which in FIG. 1 is designed as a storage yarn feeding device.
  • the yarn feeder 1 has a holder 2, a take-up unit, a storage body 3, from which the yarn 40 is pulled off by the textile machine, and a brake device for adjusting a yarn tension.
  • the textile machine is for example a circular knitting machine.
  • the holder 2 is provided with a fastening device 4 for fastening the yarn feeding device 1 to the textile machine, for example on a machine ring of the circular knitting machine.
  • the storage body 3 is formed as a storage drum having an axis 5. At the rewinding, in the FIG. 1 At the right end, the storage body 3, the take-up unit for winding up yarn turns, ie turns of the yarn, is arranged on the storage body 3.
  • the take-up unit is provided with a drive arranged in a drive housing 6 and a driven by the drive Aufwickelement 7.
  • the holder 2 extends parallel to the axis 5 along the storage body 3.
  • the drive housing 6 is attached to the take-up, in the figures at the right end of the storage body 3 on the holder 2.
  • the brake device for adjusting a thread tension of the thread 40 has a brake body 8 and an adjustment device for the brake body 8.
  • the brake body 8 is arranged in the thread path after the storage body 3, wherein it is arranged at the dashed line drawn-off end of the storage body 3.
  • a housing 9 of the braking device is attached to the drive housing 6 opposite end of the storage body to the holder 2.
  • the Bremsköper 8 is conical, as a compliant brake body cone in the form of a regular truncated cone, formed.
  • it is made of a plastic and / or metal.
  • Corresponding or similar brake bodies are for example in the WO2006 / 045410A1 described.
  • the axis of the brake body 8 is substantially true, d. H. except for small deviations e.g. by lifting through the thread 40 or upon deformation of the elastic brake body 8, with the axis 5 of the storage body 3 match.
  • the discharge end of the storage body 3 is rounded and forms in the region of the rounding an annular clamping surface 10.
  • the brake body 8 protrudes with its larger diameter on the clamping surface 10. It is by the adjustment against the clamping surface 10 at the discharge end of the storage body 3 can be pressed.
  • the thread 40 When the thread 40 is pulled through the textile machine, the thread 40 runs from the storage body 3 through the gap between the withdrawal end of the storage body 3 and the brake body 8 via the clamping surface 10.
  • the adjusting device has adjusting elements, namely magnetic elements, wherein a magnetic element in the magnetic field of another magnetic element is movable and acts on the brake body 8.
  • One of the magnetic elements is designed as a working coil 12.
  • the adjusting device comprises a permanent element, hereinafter PM element, and the working coil 12 movable in the magnetic field of the PM element.
  • the PM element and the working coil 12 are located in the housing 9 and are in FIG. 1 not visible.
  • the working coil 12 acts on the brake body 8.
  • the working coil 12 operates on the principle of a plunger coil, which English is called "voice coil".
  • the magnetic elements of the adjuster are controlled by a brake signal, namely by a working current for the working coil 12.
  • a brake signal namely by a working current for the working coil 12.
  • In contact with the brake body 8 causes an action on the working coil 12 with a certain working current to a possibly small, axial movement of the working coil 12 and thus a change in the contact force of the brake body 8 against the clamping surface 10.
  • a desired yarn tension is adjusted.
  • the working current is changed so that the working coil 12 is moved back into a position in which it no longer acts on the brake body with a contact force.
  • the holder 2 forms starting from the housing 9 an electronic chamber E, in the electronic elements of the adjustment, such as a Stromunteriser, for controlling the
  • Such a braking device is in the EN 10 2013 113 115.8 and the DE 10 2013 113 122.0 described.
  • the yarn feeding device 1 additionally comprises a yarn tension unit for controlling the yarn tension with a tension measuring unit which has a yarn tension sensor 50, a measuring device 51 and a connection 52.
  • FIG. 1 schematically shows the yarn tension sensor 50 with the direction indicated by arrows measuring device 51, the thread behind the housing 9, ie in FIG. 1 on the left, is arranged.
  • the measuring device 51 of the yarn tension sensor 50 is connected via the connection 52 with the yarn feeding device 1.
  • the yarn tension sensor 50 is attached to the housing 9.
  • FIG. 2 shows a block diagram of the textile machine with the system with at least one yarn feeding device for controlling the yarn delivery of the yarn feeding device.
  • a thread tension setpoint Fset e.g. a value in cN
  • the reference value Mref of the thread tension i. a reference value Mref for the measured values Mi of the thread tension unit distinguished.
  • the adjusting device of the yarn feeding device 1 comprises a current supply unit for the working current of the working coil 12, i. for the brake signal of the whilmentes, with a pulse width modulation having a power unit SL.
  • the yarn feeding device has a processor unit P, which comprises the current supply unit and the thread tension unit.
  • the thread tension unit comprises, for controlling the thread tension, the tension measuring unit with the thread tension sensor 50, the measuring device 51, the values mi of the measured tension, e.g. in mV, supplies, and the connection 52 and a measured value unit 53 for determining the measured value Mi from the values mi, an offset memory 54 for storing the offset value m0 and a memory 55 for storing the conversion ratio M / m.
  • connection 52 connects the measuring device 51 to the processor P. It is connected to the measured value unit 53 and to the offset memory 54. The offset memory 54 and the memory 55 are connected to the measured value unit 53.
  • the thread tension unit has a tension control unit 60, a reference value unit 61 for determining the reference value Mref from a thread tension setpoint Fset, and an adder 62.
  • the thread tension unit comprises a determination unit 70 for determining the value I_SOLL of the working flow.
  • the thread tension unit is connected via this determination unit 70 to the power supply unit, specifically to the power unit SL.
  • the value I_SOLL is the value of the working current, which is transferred from the thread tension unit to the current supply unit, in the following output value I_SOLL.
  • the reference value unit 61 is designed to transmit a reference value Mref for the measured values Mi of the thread tension. It is connected to a reference value input of the voltage regulation unit 60 in order to transmit the reference value Mref.
  • the output of the measuring device 51 is connected to the measured value unit 53 via the connection 52 for transmitting the values mi.
  • the measured value unit 53 is connected to a measured value input of the voltage regulating unit 60 in order to transmit the measured values Mi.
  • the voltage regulation unit 60 is designed to calculate a difference Mdiff from the measured value Mi and the reference value Mref and to determine a positive or negative current difference Idiff of the working current from the difference Mdiff, wherein the difference Mdiff is minimized.
  • a control value output of the voltage regulation unit 60 is connected to an input of the adder 62 for transferring the change in the control value, namely the current difference Idiff.
  • the determination unit 70 is connected to a second input of the adder 62 for transferring the value I_SOLL of the working current.
  • An output of the adder 62 is connected to the determination unit 70 for transferring the value Isoll of the working current.
  • the determination unit 70 is designed to predefine the brake signal, ie the current values I_SOLL of the working current. To determine the zero point of Voltage measuring unit, the determination unit 70 is designed to perform a brake release BE with the thread standing with at least one discharge cycle. At each unloading cycle, the working current, ie its setpoint I_SOLL, is changed from an output value la to a value Imin at which the brake body 8 is completely relieved.
  • the determination unit 70 is connected to the offset memory 54 via a line for transmission of a control signal.
  • the value mi of the voltage measuring unit 51 which is measured at the value Imin of the operating current during the last discharge cycle, is determined as a new offset value m0, and thus used for zero point determination.
  • the system comprises in addition to the yarn feeding device 1 a plurality of yarn feeding devices 1 ', 1 "..., a central control device FS and a communication link K, by the central control device FS and the yarn feeding devices 1, 1', 1" ... are interconnected.
  • the central control device FS is connected to the textile machine M and that at the machine control.
  • the central control device FS is connected to the reference unit 61 for supplying the thread tension setpoint value Fsetpoint via the communication connection K with the thread tension unit.
  • the central control device FS is connected to the determination unit 70 for the transmission of a control signal S1 via the communication line K.
  • a brake release BE is started.
  • the central control device FS is designed to carry out a preparatory run before a determination of the zero point of the tension measuring unit and to specify a thread tension operating value Fb.
  • the communication link K is e.g. formed as a CAN-BUS, to which the yarn feeding devices 1 and the central control device FS are connected.
  • the processor unit P of the yarn feeding device 1 is arranged in the yarn feeding device 1, namely in the setting device.
  • the specified elements are designed as electronic elements and / or as programs (software).
  • the thread 40 is in each case supplied by the yarn feeding device 1 to the textile machine, in which the thread 40 through the textile machine M from its storage body. 3 is deducted.
  • a yarn tension of the yarn 40 is adjusted by the braking device in the yarn path after the storage body 3 by the brake body 8 is pressed against the clamping surface 10 at the discharge end of the storage body 3.
  • the working coil 12, the adjusting element of the adjusting device acts on the brake body 8.
  • the working coil 12 is driven by the working current of the current supply unit, the brake signal.
  • the brake signal is adjusted by the thread tension unit.
  • measured values Mi of the thread tension are determined by the tension measuring unit and the difference Mdiff from the reference value Mref and the measured values Mi is minimized.
  • the values mi of the measuring device 51 of the yarn tension sensor 50 are determined in the measured value unit 53, as indicated above, with the aid of the current offset value m0 of the offset memory 54 and the conversion ratio M / m of the memory 55 to measured values Mi.
  • the difference Mdiff is determined and derived therefrom a current difference Idiff.
  • the voltage regulation unit 60 includes e.g. a PI controller.
  • This positive or negative current difference Idiff is added in the adder 62 to the output value I_SOLL of the operating current fed back by the determination unit 70.
  • the result, the new setpoint Isoll is supplied to the determination unit 70.
  • the determination unit 70 transfers the new desired value Isoll as the output value I_SOLL of the current supply unit.
  • the control of the thread tension is carried out with a time constant t2 of 0.1 s to 5 s, in particular of 0.3 s to 2 s.
  • the time constant t2 is 0.3 s.
  • FIG. 3 shows a simplified flow diagram of a brake release BE with the thread 40 standing with a number of Nmax unloading cycles. After the start, the number N is first set to zero. Since a preparatory run had previously been carried out, a delay of TA of 0.1 s to 2 s is awaited.
  • N 1.
  • the determination unit 70 changes its output value I_SOLL from the output value la in steps ⁇ I to the value Imin.
  • the determination unit sends a signal S2 for determining the zero point to the offset memory 54.
  • the output value I_SOLL is again changed to la in a stepwise manner.
  • FIG. 4 shows a simplified flow diagram of a determination of the zero point of several yarn feeding devices 1, 1 ', 1 ", ..., in which a preparatory run is performed before the brake release BE.
  • the textile machine M is stopped.
  • the central control device FS sends a corresponding signal to the textile machine M.
  • the central control device FS stores the current thread tension Fi of the yarn feeding devices 1, 1 ', 1 ", ... It gives the yarn feeding devices 1, 1', 1" ... the thread tension operation value Fb.
  • the thread tension is controlled in the yarn feeding devices 1, 1 ', 1 ", ... to the reference value Mref corresponding to the value Fb.
  • the central control device FS starts the textile machine for a certain period of operation.
  • the operating time of a specific delivered thread length Lb corresponds to at least one of the yarn feeding devices 1, 1 ', 1 ",... Then the central control device FS stops the textile machine M.
  • the central control device FS starts the brake release for the yarn feeding devices 1, 1 ', 1 ",... Via the brake release signal S1 to the respective determination unit 70.
  • the brake release BE is set in the yarn feeding devices 1, 1', 1 "..., how to FIG. 3 described, performed.
  • the central control unit FS queries the yarn feeding devices 1, 1 ', 1 "..., whether the brake release BE and the determination of the zero point is completed.
  • the yarn tension setpoint values Fsetpoint are reset by the central control device FS to the yarn tension setpoint values Fi of the yarn feeding devices 1, 1', 1",.
  • FIG. 5 2 shows an illustration of a switch-on time of the textile machine M, a curve of the brake signal, ie the output values I_SOLL of the working current determining unit 70, and the thread tension during a determination of the zero point of the tension measuring unit of a yarn feeding device 1.
  • the illustration shows that after a short time interval the textile machine M was set (start) and was issued after a certain operating time (stop).
  • the operating time corresponds to a certain delivered yarn length Lb.
  • an output value Ib of the working current was supplied from the determination unit 70 to the work coil 12, which corresponds to the yarn tension operation value Fb from the central control device FS.
  • the thread tension was regulated.
  • the output value Ib fluctuates slightly.
  • the output value Ia is a mean value in the total range of the working current, i. of the brake signal, between a maximum value Imax and a minimum value Imin.
  • the total operating current range is 200 mA to -200 mA, with the output Ia being 0 mA and the lowest value Imin being -200 mA.
  • N 3
  • the output value is changed by the determination unit 70 from the output value Ia in stages ⁇ I to the value Imin and back to the output value la.
  • a pause Tp is awaited.
  • the thread tension dropped below its zero point.
  • the new zero point of the voltage measuring unit was determined. Ie. the offset value m0 of the measuring device 51 has been changed as described above.
  • the central control unit FS is connected only to the transmission of a stop signal to the textile machine M.
  • the controls of the textile machine M performed by the central controller FS in the previous example are performed by an operator by hand.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Looms (AREA)
EP16195946.5A 2015-11-23 2016-10-27 Verfahren zur steuerung der fadenlieferung mindestens eines fadenliefergerätes und textilmaschine mit einem system mit mindestens einem fadenliefergerät Active EP3170779B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015120264.6A DE102015120264B3 (de) 2015-11-23 2015-11-23 Verfahren zur Steuerung der Fadenlieferung mindestens eines Fadenliefergerätes und Textilmaschine mit einem System mit mindestens einem Fadenliefergerät

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Publication Number Publication Date
EP3170779A1 EP3170779A1 (de) 2017-05-24
EP3170779B1 true EP3170779B1 (de) 2018-10-24

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Country Link
EP (1) EP3170779B1 (zh)
CN (1) CN106929992B (zh)
DE (1) DE102015120264B3 (zh)
TR (1) TR201819983T4 (zh)
TW (1) TWI622544B (zh)

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DE102015120264B3 (de) 2016-12-29
TW201730697A (zh) 2017-09-01
TWI622544B (zh) 2018-05-01
CN106929992A (zh) 2017-07-07
CN106929992B (zh) 2019-08-06
EP3170779A1 (de) 2017-05-24
TR201819983T4 (tr) 2019-02-21

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