EP2878722B1 - Verfahren zur Steuerung der Fadenlieferung, Fadenliefergerät und System mit Fadenliefergeräten - Google Patents

Verfahren zur Steuerung der Fadenlieferung, Fadenliefergerät und System mit Fadenliefergeräten Download PDF

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Publication number
EP2878722B1
EP2878722B1 EP14192884.6A EP14192884A EP2878722B1 EP 2878722 B1 EP2878722 B1 EP 2878722B1 EP 14192884 A EP14192884 A EP 14192884A EP 2878722 B1 EP2878722 B1 EP 2878722B1
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EP
European Patent Office
Prior art keywords
thread
unit
values
supply device
working
Prior art date
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Application number
EP14192884.6A
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German (de)
English (en)
French (fr)
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EP2878722A1 (de
Inventor
Matthias KÖCHEL
Markus Kleindorp
Schultheiß Sven
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Memminger IRO GmbH
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Memminger IRO GmbH
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Publication of EP2878722A1 publication Critical patent/EP2878722A1/de
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/364—Yarn braking means acting on the drum
    • D03D47/366—Conical
    • 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

Definitions

  • the invention relates to a method for controlling the yarn delivery from a yarn feeding device to a textile machine, a corresponding yarn feeding device and a system with yarn feeding devices.
  • the thread is withdrawn by the textile machine from a storage body of the yarn feeding device.
  • a braking device in the thread path after the storage body, a yarn tension of the yarn is adjusted, wherein a brake body of the brake device is pressed against a clamping surface at a discharge end of the storage body.
  • Subject of the EP 2 065 496 B1 is a yarn feeding device with a stationary storage body and with a yarn brake with a conical, resilient brake body, wherein the brake body is pressed by mutually repelling permanent magnet arrangements on the brake body and in a support against the discharge end of the storage body.
  • the yarn feeding device has an adjusting device with a threaded screw device for adjusting the braking effect between the brake body and the discharge end, wherein the relative axial position of the permanent magnet assembly of the support is varied.
  • the thread supply device comprises a quick adjustment device, by means of which the axial position of both the permanent magnet arrangement of the support and of the screw device is variable.
  • the setting device with the thread screwing device and the quick setting device are operated by hand.
  • a special thread brake body with the shape of a regular truncated cone shell of thin-walled, at least radially elastic material on the basis of at least plastic and / or metal is in the WO 2006/045410 described.
  • a brake zone of the brake body is defined by the inside of a circumferentially continuous wall area between the small and large diameter ends of the brake body.
  • an adjusting device for the brake body has at least two magnetic field generating magnetic elements, such as coils or permanent magnets, wherein a magnetic element engages the brake body.
  • a desired yarn tension is adjusted by varying a working current of a magnetic element designed as a working coil.
  • the EP 0 519 970 B1 describes a trigger brake system of a yarn feeding device, in which the thread from a yarn storage body via a trigger channel withdrawn axially can be.
  • the trigger brake system has an abutment element arranged at the discharge end of the storage body and a clamping element with a clamping function for the thread.
  • the clamping element is connected to an actuating unit, which is controlled by signals from a control unit for varying the contact pressure during a withdrawal process, for example for varying the thread tension.
  • the actuator includes, for example, a magnetic member in an iron core and an axially movable coil, the coil receiving electrical control signals.
  • the WO 2006/048053 A1 describes a yarn braking device for a yarn feeding device with a brake body which is pressed against a discharge end of a drum-shaped storage body, with an axial force generator with a pair of permanent magnets and with a centering device.
  • the Axialkraftgenerator has an axial direction of action and the centering device on a radial effective direction between a stationary holder and the brake body.
  • the thread braking device comprises a coil which can be acted upon by current on or outside the brake body.
  • the coil is functionally associated with one of the permanent magnets of the axial force generator, wherein an axial force superimposed on the auxiliary power can be generated via the coil.
  • the apparatus comprises a yarn storage unit having a drum, a yarn length measuring detector and a yarn tension adjusting element.
  • the element is axially in contact with the discharge end of the drum.
  • the position or the applied force of the element is by an electric Drive unit changeable to adjust the yarn tension in response to a signal of the length measurement.
  • the position or the applied force of the element is set by permanent magnets and changeable by a coil, wherein the coil is supplied with an adjustment current from the drive unit.
  • the EP 0 536 088 B1 relates to a modulated yarn brake for weft feeding devices, wherein the yarn feeding device comprises a fixed drum with a supply of thread.
  • the thread brake comprises a brake body, which is supported by an elastic device frontally and coaxially with the drum and brought into elastic contact engagement against the drum.
  • the brake body has a cylindrical portion with a coil extending into an annular gap of the collar of a permanent magnet.
  • the coil is supplied with an excitation current, which is modulated according to the variations in the tension of the thread.
  • means are provided for detecting the tension of the thread and converting the tension into a corresponding signal used to modulate the excitation current.
  • the brake body is supported by a plate of the elastic device, which is centrally perforated and elastically deformable along an axial direction.
  • the EP 0 707 102 B1 describes an alternative modulated yarn brake for weft supplies.
  • the yarn brake has a brake body mounted in front of the drum of the delivery device, which is subject to the action of an electromechanical drive means, for example a stepper motor.
  • the drive means is supplied with a modulated excitation current which is modulated to correspond to the variation of the tension of the thread during the weaving operation.
  • the modulated current supplied to the motor is generated by a microprocessor.
  • the microprocessor receives from the loom, or alternatively from a sensor, a signal designed to modulate the intensity and direction of the current in proportion to the instantaneous value of the tension of the thread.
  • the object of the invention is a method for controlling the yarn delivery from a yarn feeding device to a textile machine and a corresponding yarn feeding device according to to develop the preamble of the independent claims, with individual deviations and possibly temporal variations of the braking device and the adjustment can be compensated.
  • the yarn is pulled off a storage body of the yarn feeding device through the textile machine.
  • a yarn tension of the yarn is adjusted in the yarn path after the storage body by a braking device by a brake body of the brake device is pressed against a clamping surface at the discharge end of the storage body.
  • a yarn tension is adjusted.
  • a magnetic element of the adjusting device is movable in the magnetic field of the other magnetic element and engages the brake body.
  • At least one of the magnetic elements of the adjusting device is designed as a working coil.
  • To set a specific value of the thread tension is set by a current unit of the setting a corresponding to the desired working current of the working coil.
  • a processor unit having a data unit outputs a setpoint value of the operating current which is associated with the current value of the thread tension and which is specific to the yarn delivery device.
  • the working current is regulated by a control device of the power unit to this target value.
  • the advantage of regulating the coil current is that it compensates for various influences, such as temperature.
  • specific data is stored in the data unit for the yarn feeding device. To determine specific data, values of the working current are assigned to measured values of the thread tension.
  • the specific data is determined under different production conditions.
  • the specific data are determined, for example, at different yarn take-off speeds and / or different yarn qualities.
  • a table is created with values of the working current and corresponding measured values of the thread tension.
  • interpolated values are additionally included in the table.
  • the dependence of the values of the measured thread tension on the values of the working current are created as parameters of a transfer function.
  • a straight line is set by the values of the measured thread tension as a function of the set values of the working current in the relevant range. That the transfer function is assumed to be a straight line and the parameters of the straight line, zero crossing b and slope m, are determined. These parameters are used to assign the values of the working current to those of the thread tension.
  • the operating current is set by a current unit with a pulse width modulation.
  • the adjustment of the operating current by a pulse width modulation has the advantages of low heat generation in the final stage of a circuit of the Stromunterussi, i. in the power unit and a simple feasibility of the current control, namely as a digital control.
  • An inventive yarn feeding device for a textile machine has a storage body, from which the yarn is withdrawn through the textile machine.
  • a yarn feeding device is also called a storage yarn feeding device.
  • the yarn feeding device is equipped with a braking device for adjusting a thread tension of the thread.
  • the braking device is arranged in the thread path after the storage body.
  • the brake device has a brake body and an adjustment device for the brake body.
  • the brake body can be pressed by the adjusting device against a clamping surface at the discharge end of the storage body.
  • the braking device is designed for example as a so-called cone brake, wherein the brake body has the shape of a truncated cone shell.
  • the adjusting device comprises at least two magnetic field generating magnetic elements, such as coils or permanent magnets.
  • One of the magnetic elements is movably arranged in the magnetic field of the other and acts on the brake element.
  • a magnetic element as a permanent magnet element, which is arranged on a holder of the yarn feeding device, and a second magnetic element as a movable in the magnetic field of the permanent magnet, formed on the brake body coil formed.
  • a permanent magnet element is movable and designed to be vulnerable to the brake body, and the other designed as a coil magnetic element arranged on the holder.
  • both magnetic elements are formed as coils, wherein a coil arranged on the holder and a coil movable, are formed on the brake body vulnerable.
  • a magnetic element of the adjusting device designed as a coil is designed as a working coil.
  • both coils are designed as work coils.
  • the adjusting device comprises a current unit, by which a work current corresponding to the desired value of the working coil is set.
  • the yarn feeding device is assigned a processor unit, by means of which a desired value of the working current, which value is assigned to the current value of the thread tension and which is specific to the yarn feeding device, is output.
  • the current nominal value of the thread tension is transmitted, if necessary, from a central control unit.
  • the power unit comprises a control device by which the working current is controlled to this setpoint of the working current.
  • the data unit is designed to provide specific data of the yarn feeding device.
  • the specific data includes an assignment of values of the working current to measured values of the thread tension.
  • the current delivery unit has a current unit with a pulse width modulation.
  • control device has a current measuring unit for the working coil and a control unit.
  • the control unit is provided, for example, with a PI controller.
  • the processor unit also comprises the control unit in addition to the data unit.
  • An inventive system has in one embodiment at least one inventive yarn feeding device, a central control device and communication links between the central control device and the yarn feeding devices.
  • Each processor unit with the data unit of the yarn feeding devices is arranged in the respective yarn feeding device.
  • the central control device is connected via the communication lines with the arranged in the yarn feeding units processor units.
  • a system according to the invention has at least one yarn feeding device according to the invention, a central control device and communication links between the central control device and the yarn feeding devices.
  • the processor units with the data units of the yarn feeding devices are arranged in the central control device.
  • the central control unit is connected via the communication lines with the control devices of the power supply units of the yarn feeding devices.
  • An inventive yarn feeding device 1 for supplying a thread 40 to a textile machine which in the FIGS. 1 . 2 . 3a and 3b is designed as a storage yarn feeding device.
  • the yarn feeding device 1 has a holder 2, a take-up unit, a storage body 3, from which a thread 40 is withdrawn through the textile machine, and a brake device for adjusting a thread tension.
  • the thread 40 is only in FIG. 2 located.
  • 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.
  • the take-up unit for winding yarn turns i. Windings of the thread, 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.
  • 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 braking device is arranged in the thread path after the storage body 3, wherein the brake body 8 on, in FIG. 2 schematically drawn, withdrawal end of the storage body 3 is arranged.
  • 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 aforementioned WO2006 / 045410A1 described.
  • the axis of the brake body 8 is substantially identical, ie, except for small deviations, for example, 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 withdrawal 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 over the Clamping surface 10. It can be pressed by the adjusting device against the clamping surface 10 at the discharge end of the storage body 3.
  • 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 comprises at least two magnetic field generating magnetic elements, such as coils or permanent magnets (PM).
  • One of the magnetic elements is arranged to be movable in the magnetic field of the other and acts on the brake body 8.
  • a magnetic element as a PM element 11 and a second magnetic element as a working coil 12 movable in the magnetic field of the PM element 11 are formed.
  • the working coil 12 is arranged so that it acts on the brake body 8.
  • the brake body 8 is at its smaller diameter, d. H. provided at its end facing away from the storage body 3 end, with an inner ring 13 and with an outer ring 14.
  • the inner ring 13 is funnel-shaped and has an inner funnel-shaped Fadenleit constitutional matter 13 a.
  • the outer ring 14 is provided with a collar. The inner ring 13 and the outer ring 14 are interconnected by snap-in connections.
  • the adjustment device has a drain pipe 15 and an element housing 16 for the PM element 11.
  • the exhaust pipe 15 extends, possibly to installation tolerances, parallel to the axis 5.
  • the exhaust pipe 15 leads the thread 40 from its the storage body 3 facing the inlet end to its opposite outlet end by the adjustment of the braking device.
  • the element housing 16 is arranged in a region of the exhaust pipe 15 facing the accumulator body 3. It has a perpendicular to the axis 5 extending bottom portion 16 a, which is integrally formed on the exhaust pipe 15 in its central region, and extending around the axis 5 cylindrical shell portion 16 b, on which the PM element 11 is disposed on.
  • the working coil 12 comprises a coil holder 17, on which one or more windings of the working coil 12 are arranged and which acts on the brake body 8.
  • the coil holder 17 can be brought into contact with the brake body 8.
  • the PM element 11 is formed as a cylindrical ring or hollow cylinder portion.
  • the work coil 12 with the coil holder 17 is formed as a cylindrical ring or hollow cylindrical portion.
  • the movable working coil 12 is located substantially inside the PM element 11.
  • the exhaust pipe 15 has a thickening 15a in the region of the element housing 16.
  • the working coil 12 is arranged in an annular air space of an opening 16c of the element housing 16, wherein the air space through the bottom portion 16a and the skirt portion 16b with the PM element 11 of the element housing 16 and the thickening 15a of the exhaust pipe 15 is limited.
  • the working coil 12 is axially movable in the opening 16c, i. it is arranged at a distance from the jacket portion 16b.
  • the working coil 12 is arranged radially outward at a distance from the PM element 11 and radially inwardly at a distance from the thickening 15a. These distances allow tilting of the working coil 12 by a maximum of 3 °.
  • the PM element 11 rests on an annular shoulder 16d of the inner circumferential surface of the jacket section 16b.
  • the adjusting device has a biasing unit with a spring element 18, wherein the spring element 18 is arranged to act on the brake body 8.
  • the spring element 18 is arranged on the coil holder 17.
  • the spring element 18 is an output force on the coil holder 17, thus exercisable on the brake body 8 and through this on the clamping surface 10 on the thread 40.
  • the spring element 18 is designed as a cylindrical helical spring whose axis corresponds to the axis 5, if necessary, except for installation tolerances.
  • the above-mentioned thickening 15a of the exhaust pipe 15 is provided in the region of the opening 16c with an open towards the storage body 3 annular opening 15b for receiving the spring element 18.
  • the thickening 15a ends in the course of the spring element 18, so that the spring element 18 protrudes from the opening 15b.
  • the bobbin holder 17 has a cylindrical holder portion 17a, a cover portion 17b with a collar 17c and contact elements formed as contact pins 17d.
  • the contact pins 17d are arranged on the brake body 8 can be acted upon.
  • Windings of the working coil 12 are arranged on the cylindrical holder section 17a.
  • the cover section 17b protrudes radially inwardly over the spring element 18, wherein the spring element 18 terminates with its collar 17c.
  • the spring member 18 which is compressed in the installed state for exerting the output force, is in contact with the cover portion 17b within the collar 17c.
  • contact pins 17d extend in the direction of the storage body 3.
  • 3b only one contact pin 17d is visible, the other two are outside the cutting plane.
  • the contact pins 17d act on the outer ring 14 of the brake body 8, ie they are in contact with a surface 5 extending perpendicular to the axis of the collar of the outer ring 14.
  • the adjusting device has an axially elastic centering unit for centering the working coil 12, which is designed as an axially elastic disc 19.
  • the disc 19 is arranged in the region of the brake body 8 facing the end of the working coil 12.
  • Such a flexible disk 19 is also referred to as a membrane.
  • the disc 19 has an opening for the exhaust pipe 15 and extends perpendicular to the axis fifth
  • the disc 19 is at its inner periphery, i. at the edge of the opening, attached to the exhaust pipe 15. In the region of its outer periphery, the disc 19 is arranged freely movable. It is made of an elastomer.
  • the disc 19 is connected in its outer region with the coil holder 17.
  • the disc 19 centers the coil holder 17 with the windings and thus the working coil 12th
  • the disc 19 projects beyond the coil holder 17 at its outer edge.
  • the disc 19 terminates at its outer periphery with the outer circumference of the spool holder 17.
  • the disk 19 with the working coil 12 is arranged freely movable on its outer periphery.
  • the disc 19 is disposed on the cover portion 17 b of the bobbin holder 17.
  • the disc 19 has, in addition to the central opening through which the exhaust pipe 15 protrudes, further, in this example, three openings through which the contact pins 17 d of the bobbin 17 protrude.
  • the disc 19 is connected to the contact pins 17 d with the coil holder 17 and the working coil 12.
  • the disc 19 is located in the region of the central opening on a shoulder 15 c of the exhaust pipe 15 and is fixed thereto.
  • the disc 19 At her outer circumference, the disc 19 at a distance from the skirt portion 16b of the element housing 16 and thus, as mentioned, arranged to be freely movable.
  • the disc 19 also centers the brake body 8 via the contact pins 17d.
  • the adjusting device has a sealing unit for the working coil 12, which is arranged between the disc 19 and the brake body 8.
  • the sealing device comprises two parallel sealing plates 20, 21 and one or more sealing elements 22 between the sealing plates 20, 21.
  • the sealing plates 20, 21 extend perpendicular to the axis 5 and are fixed to the exhaust pipe 15. They are arranged at a distance from the disc 19 and cover the element housing 16 from.
  • the sealing plates 20, 21 have, in this example three, openings 20a, 21a, through which the contact pin 17d protrude, and a central opening 20b, 21b, through which the exhaust pipe 15 protrudes. There is a gap between the contact pins 17d and the edges of the corresponding openings 20a, 21a.
  • the sealing plates 20, 21 are fixed to the exhaust pipe 15 in the area of the central openings 20b, 21b.
  • the storage body 3 facing away from the sealing plate 21 is located with its outer edge on the edge of the shell portion 16b.
  • The, in this example three, sealing elements 22 are formed as disc-shaped elements and arranged between the cover plates 20, 21 in the region of the contact pins 17d.
  • the sealing elements 22 each have an opening 22a corresponding to the circumference of the contact pins 17d. They are made of a deformable material, for example a felt, which closely surrounds the contact pins 17d.
  • the sealing elements 22 are designed, for example, as round disks whose outer diameter is greater than that of the corresponding openings 20a, 20b of the cover plates 20, 21.
  • the adjusting device comprises a spacer cylinder 23 which surrounds the exhaust pipe 15 and is arranged between the disk 19 and the cover plate 21.
  • the adjustment device further comprises a fastener 24, for example a nut with an internal thread, provided on the correspondingly threaded. Inlet end of the exhaust pipe 15 is screwed onto this.
  • the fastening element 24 By the fastening element 24, the cover plates 20, 21, the sealing elements 22 and the disc 19 are fixed.
  • the adjusting device comprises at the inlet end of the exhaust pipe 15 an inlet eye 27 and at its outlet end an outlet eye 28 for the thread 40.
  • the inlet eye 27 protrudes into the inner ring 13 of the brake body. 8
  • the adjusting device is provided with a locking ring 29, which, in this example three, has pipe sections for the contact pins 17d.
  • the locking ring 29 is disposed between the outer ring 14 of the brake body 8 and the element housing 16 and inserted with its pipe sections on the contact pins 17 d and connected by latching connections with the contact pins 17 d.
  • the adjusting device is designed as a pumpseinstellvorraum.
  • the exhaust pipe 15 and the element housing 16 are connected to each other and formed together in the housing 9 axially displaceable. This allows these parts of the adjustment in a single axial stroke of the brake body 8, on which the inner ring 13 and the outer ring 14 are arranged, and thus deduct from the storage body 3.
  • the exhaust pipe 15 and element housing 16 are integrally formed as a holding element, wherein a portion of the holding element, the exhaust pipe 15 and an adjacent portion form the element housing 16.
  • the compression spring 30 is formed as a cylindrical coil spring, which is arranged in the outlet region on the exhaust pipe 15.
  • the housing 9 has a housing bottom 9a running perpendicular to the axis 5 and a housing jacket 9b.
  • the housing jacket 9b is designed as a cylinder section extending around the axis 5.
  • the housing jacket 9b surrounds the element housing 16 and projects beyond the jacket section 16b at the inlet end.
  • the cover plates 20, 21 are thereby disposed within the housing shell 9b.
  • the housing jacket 9b also extends beyond the region of the exhaust pipe 15 facing away from the accumulator body 3, so that the bottom portion 16a of the element housing 16 and the housing bottom 9a are arranged at a distance from one another. Between the housing jacket 9b and the exhaust pipe 15, an annular cavity is formed, in which the compression spring 30 is arranged on the exhaust pipe 15.
  • the housing jacket 9b is fastened to the holder 2 over a specific radial area along its axial extent.
  • the holder 2 forms starting from the housing shell 2b an electronic chamber (see. Fig. 2 ), are arranged in the electronic elements of the adjusting device, such as a power supply unit, for driving the working coil. In the FIGS. 1 . 2 and 3a this area can be seen above the housing 9.
  • the housing jacket 9b is provided with a radial, inwardly extending housing shoulder 9c.
  • the housing shoulder 9c subdivides the annular cavity into a first section 31 with a larger diameter, which adjoins the section surrounding the element housing 16 in a straight line, and a second section 32 with a smaller diameter through the housing section 9c, which surrounds the compression spring 30. It is supported on the inlet side on the bottom portion 16a of the element housing 16 and on the outlet side on an inner surface of the housing bottom 9a.
  • the casing section 16b of the element housing 16 has at its inlet edge a ring collar 16e projecting toward the casing jacket 9b.
  • the housing jacket 9b is provided with, for example, three, distributed over the inner circumference of the element housing 16, extending in the axial direction ribs.
  • the annular collar 16e of the element housing 16 and the ribs of the housing shell 9b serve to guide the element housing 16 and thus of the retaining element during axial movement in the housing jacket 9b.
  • a rib can be seen at the top of the housing jacket 9b.
  • the housing bottom 9a is provided with an opening 9d, through which the exhaust pipe 15 protrudes and in which it is arranged axially displaceable.
  • an annular actuating element 33 is placed on the exhaust pipe 15.
  • the actuating element 33 can be fixed with a locking pin 34 on the exhaust pipe 15. It has a contact surface 33a, which rests in a basic position on the outside of the housing bottom 9a.
  • the basic position is the operating position, in which the working coil 12 is arranged to act on the brake body 8.
  • the holding element with the exhaust pipe 15 and element housing 16 with the PM element 11 and with the attached to the exhaust pipe 15 disc 19 can be positioned with coil holder 17 and coil of the working coil 12 and with the sealing unit in the basic position.
  • the distance between the holding element and thus the adjusting device for the brake body 8 is adjusted against a force of the compression spring 33 by means of the locking pin 34. In the basic position, the compression spring 33 may be little pressed together.
  • the holding element is axially displaceable together with the aforementioned parts on the actuating element 33 against the compression spring 30 in the outlet direction and thus from the brake body 8, on which the inner ring 13 and the outer ring 14 are arranged, can be lifted. This allows a quick replacement of the brake body 8 with the inner ring 13 and the outer ring 14th
  • the PM element 11 is made of a material that generates a strong magnetic force.
  • the material of the PM element contains rare earths, for example neodymium.
  • the PM element 11 is radially magnetized with respect to the axis 5, i. it forms radial magnetic field lines.
  • the holding member constituting the exhaust pipe 15 and the element housing 16 is made of a soft magnetic material such as iron.
  • the exhaust pipe 15 in the region of the element housing 16 with its thickening 15a, the bottom portion 16a and the shell portion 16b form iron core elements through which close the radial magnetic field lines emanating from the PM element 11.
  • the working coil 12 is disposed axially movable and tiltable. It works on the principle of a plunger, also called "voice coil”.
  • FIG. 4 shows a schematic block diagram for adjusting the working current of the working coil 12th
  • the adjusting device comprises a current supply unit for setting a working current of the working coil 12, which comprises a current unit SL and a control device.
  • the current unit SL is provided with a pulse width modulation.
  • the control device is provided with a current measuring unit SM and with a control unit SR.
  • the control unit SR is designed for example as a PI controller and connected to the power unit SL.
  • the yarn feeding device 1 has a processor unit P with a data unit F1 for outputting the yarn feeding device 1 of specific data.
  • the data unit F1 of the yarn feeding device 1 is designed to provide specific data of the yarn feeding device 1, the specific data comprising an assignment of values I of the working current to measured values F of the yarn tension.
  • the data unit F1 for the yarn feeding device 1 contains specific setpoint values I soll of the working current for its working coil 12, which are assigned to specific values F soll of the yarn tension.
  • a value F soll of a thread tension supplied by the processor unit P can be used to output the corresponding desired value I soll of the working current for the working coil 12.
  • a central control device FS is connected via a communication line K.
  • the control device FS is designed to supply the desired value F soll for the thread tension.
  • the processor unit P is connected to the data unit F1 via one of the communication links K with the central control device of a later explained system with one or more yarn feeding devices 1.
  • a setpoint value F soll of the thread tension is transmitted from the central control device, namely by the control device FS, to the processor unit P with the data unit F1 via the communication link K.
  • FIGS. 5a and 5b show diagrams for illustrating a power supply of the power unit SL with a pulse width modulation, in which the working current I is adjusted by means of voltage pulses U.
  • FIG. 5a shows in the upper diagram, a ratio of the pulse duration Tc to the period T, which is also called duty cycle, of 0.25.
  • Such a power supply provides an average operating current I, which corresponds to a proportion of 0.25 of the maximum working current.
  • the current flow is in the lower part of the FIG. 5a to see.
  • the shows FIG. 5b corresponding representations at a duty cycle of 0.75.
  • FIG. 6 shows a schematic block diagram for measuring the working current I of the working coil 12.
  • the current measuring unit SM for the working coil 12 includes a resistor R and an operational amplifier O.
  • the resistor R is connected between the working coil 12 and ground.
  • the operational amplifier O picks up the voltage drop across the resistor R. It is connected as a low-pass filter in order to filter influences of the pulse width modulation from the measurement signal for the actual value I ist of the working current; this circuit of the operational amplifier O is not shown in the drawing.
  • a filter for the measurement signal is provided in the processor unit.
  • the processor unit P of the yarn feeding device 1 is arranged in the yarn feeding device 1, namely in the setting device.
  • the processor unit P comprises not only the data unit F1 but also the control unit SR.
  • Figure 7a shows graphs to illustrate the determination of the specific data of a yarn feeding device 1.
  • Figure 7a are voltage-current curves the Work coils 12 of four yarn feeding devices 1 located.
  • the induced thread tension F in cN is measured as a function of the working current I in mA of the working coils 12 and, for example, as in FIG Fig. 5a shown.
  • the work coils 12 of the various yarn feeding devices 1 are designated vc3, vc12, vc20 and vc29.
  • the measurements were made under a certain output force by the spring element 18.
  • the working coil 12 of the yarn feeding device 1 described in this example is designated vc3.
  • Figure 7a shows that the values F of the filament tension of the working coil 12 / vc3 are above the values of the other working coils 12 / vc12 / vc20 / vc29.
  • a standard straight N is drawn into the family of curves defined by the user.
  • the standard straight line N is determined, for example, from average values of straight lines of selected working coils placed at the measuring points in a specific range of the working current I.
  • the standard line assigns desired thread tensions F average setpoint values I soll of the working current.
  • a straight line is placed by the corresponding measuring points in this area.
  • the deviations of the parameters of this line to the parameters of the standard line N are calculated as specific data and stored in the data unit Fl.
  • the specific parameters of the working coil vc3 enable the assignment of specific nominal values I soll of the working current of the working coil vc3 to desired values F of the thread tension.
  • the yarn tension F caused by the working current I of the working coils 12 is measured as a force exerted on the storage body 3 in order to determine the specific data. This determination is called static determination.
  • the thread tension F caused by the working current I of the working coils 12 is measured on the moving thread 40, for example by a measuring arrangement with a thread tension sensor and an oscilloscope for evaluating the measured thread tension F. This determination is made as a dynamic determination designated.
  • the static determination is selected as the first determination of the specific data and the dynamic determination as the second determination.
  • the first determination calculates the specific data using a standard line N and specific parameters.
  • the second determination is for further calibration of the yarn feeding device. 1 used. It adapts the specific data using two separate measuring points.
  • the first measuring point is z. B. in the range 10 to 30% and the second measuring point in the range 70 to 90% of a total working range of the yarn feeding device 1 is selected.
  • the thread 40 is supplied from the yarn feeding device 1 to the textile machine by the thread 40 is withdrawn through the textile machine from the storage body 3 of the yarn feeding device 1.
  • a thread tension of the thread 40 is set in the course of the thread after the storage body 3 by the braking device by the brake body 8 is pressed against the clamping surface 10 at the discharge end of the storage body 3.
  • a magnetic element of the adjusting device namely the working coil 12, which is movable in the magnetic field of the other magnetic element, the permanent magnet element 11, acts on the brake body 8.
  • a thread tension is adjusted by adjusting a working current of the working coil 12 with the current supply unit.
  • the value F soll of the thread tension is assigned a desired value I soll of the working current, which is stored in the data unit F1, and output to the current supply unit.
  • the power supply unit of the working current of the working coil 12 is controlled to this setpoint I soll .
  • the nominal value of the working current I soll taken from the data unit is specific to the yarn feeding device 1.
  • the values of the working current specific to the yarn feeding device 1 are possibly assigned to the yarn tension (cf. FIG. 7 ).
  • FIG. 8 shows a schematic representation of a system with multiple yarn feeding devices 1.
  • the yarn feeding devices 1 are, for example, on a machine ring M, the in FIG. 8 is indicated, arranged.
  • the system has a central control device FS and communication links K between the central control device FS and the yarn feeding devices 1.
  • the communication links K may be formed as a CAN-BUS, to which the yarn feeding devices 1 and the central control device FS are connected.
  • the processor units P with the data units Fl are arranged in the respective yarn feeding devices 1, the central control device FS being connected to the respective processor units P via the communication links K.
  • the yarn feeding devices 1 have separate processor units P with the data units F1.
  • the processor units P are arranged with the data units F1 of the yarn feeding devices 1 in the central control device FS.
  • the central control device FS is connected via the communication lines K to the control devices SR of the yarn feeding devices 1.
  • the processor units P of the yarn feeding devices 1 are combined, with an overall processor unit comprising all the data units F1 of the yarn feeding devices. This means that the values of the data units F1 of all yarn feeding devices are output by a processor unit and sent to the corresponding yarn feeding devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Looms (AREA)
EP14192884.6A 2013-11-27 2014-11-12 Verfahren zur Steuerung der Fadenlieferung, Fadenliefergerät und System mit Fadenliefergeräten Active EP2878722B1 (de)

Applications Claiming Priority (1)

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DE102013113115.8A DE102013113115B4 (de) 2013-11-27 2013-11-27 Verfahren zur Steuerung der Fadenlieferung, Fadenliefergerät und System mit Fadenliefergeräten

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EP2878722B1 true EP2878722B1 (de) 2017-01-11

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EP (1) EP2878722B1 (zh)
CN (1) CN104674439B (zh)
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Publication number Priority date Publication date Assignee Title
DE102014118743B4 (de) 2014-12-16 2023-12-21 Memminger-Iro Gmbh Verfahren zur Steuerung der Fadenlieferung eines Fadenliefergerät und Fadenliefergerät
DE102015118027B3 (de) * 2015-10-22 2016-11-17 Memminger-Iro Gmbh Verfahren zur Steuerung der Fadenlieferung eines Fadenliefergerät und Fadenliefergerät
DE102015120264B3 (de) * 2015-11-23 2016-12-29 Memminger-Iro Gmbh Verfahren zur Steuerung der Fadenlieferung mindestens eines Fadenliefergerätes und Textilmaschine mit einem System mit mindestens einem Fadenliefergerät
DE102017128327B3 (de) 2017-11-29 2019-01-10 Memminger-Iro Gmbh Verfahren zur Steuerung der Lieferung von Fäden eines Systems mit mehreren Fadenliefergeräten und Textilmaschine mit einem System mit mehreren Fadenliefergeräten
CN109183264B (zh) * 2018-11-14 2023-08-25 慈溪市赛美格自动化科技有限公司 一种结构改进型输纱器
CN113005632A (zh) 2019-12-19 2021-06-22 财团法人工业技术研究院 线材张力控制装置及应用其之编织机
TWI791152B (zh) * 2019-12-19 2023-02-01 財團法人工業技術研究院 線材張力控制裝置及應用其之編織機

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
EP0855358B1 (en) 1990-03-12 2001-10-17 Iro Ab Yarn feeder
IT1251209B (it) 1991-09-20 1995-05-04 Lgl Electronics Spa Dispositivo di frenatura autoregolante del filato per apparecchi alimentatori di trama.
IT1268111B1 (it) 1994-10-10 1997-02-20 Lgl Electronics Spa Dispositivo di frenatura modulata positiva del filato, per apparecchi alimentatori di trama
EP0891286B1 (de) * 1996-03-26 2000-05-31 Iro Ab Fadenliefergerät mit einem magnetischen näherungssensor
SE0103196D0 (sv) * 2001-09-24 2001-09-24 Iropa Ag Fadenliefergerät
ITTO20020029U1 (it) * 2002-02-08 2003-08-08 L G L Electronics Spa ,,dispositivo alimentatore di trama per macchine tessili con sistema di fissaggio del tamburo fisso al corpo motore perfezionato,,
DE102004051372A1 (de) 2004-10-21 2006-04-27 Iro Ab Faden-Bremskörper
DE102005007842A1 (de) 2004-11-05 2006-05-11 Iro Ab Fadenbremsvorrichtung
WO2007048528A1 (en) 2005-10-27 2007-05-03 Memminger-Iro Gmbh Apparatus for fully-automatized control of the length of a yarn
CN101535543B (zh) * 2006-10-06 2011-07-27 梅明格-Iro股份有限公司 喂纱器
DE602007007101D1 (de) 2007-11-30 2010-07-22 Memminger Iro Gmbh Fadenzuführungsvorrichtung und Fadenbremse

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Publication number Publication date
EP2878722A1 (de) 2015-06-03
CN104674439B (zh) 2016-09-07
TWI568901B (zh) 2017-02-01
DE102013113115B4 (de) 2016-01-28
CN104674439A (zh) 2015-06-03
DE102013113115A1 (de) 2015-05-28
TW201546342A (zh) 2015-12-16

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