Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H54/00—Winding, coiling, or depositing filamentary material
  • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
  • B65H54/40—Arrangements for rotating packages
  • B65H54/52—Drive contact pressure control, e.g. pressing arrangements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
  • B65H2515/30—Forces; Stresses
  • B65H2515/34—Pressure, e.g. fluid pressure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2555/00—Actuating means
  • B65H2555/20—Actuating means angular
  • B65H2555/25—D.C. motors, e.g. shunt motors
• • 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 device for winding yarns (winding device) with a yarn carrier receptacle rotatably mounted about its longitudinal axis, adapted for receiving a yarn carrier, a pressure roller, adapted for supporting a yarn carrier arranged in the yarn carrier receptacle, a pressure lever arm which is in the region of its radially inner end is rotatably mounted at a pivot point, and an active actuator, arranged for rotating the Anpresshebelarms about the pivot point, wherein the Garnlieement is rotatably disposed at an outer end of the Anpresshebelarms perpendicular to the Anpresshebelarm.
• Such winding devices are used in winding processes, in particular rewinding processes, in yarn production, e.g. used for the production of bobbins with yarn windings adapted to a subsequent process.
• Winding devices are part of yarn making machines.
• the yarn is spooled by the winders onto a yarn carrier, eg an empty tube, to obtain a yarn package having a desired size, shape and / or density.
• the yarn carrier is either rotated by contact with a driven pressure roller for winding the yarn in rotation, or driven directly, with a pressure roller for supporting the yarn carrier is necessary.
• the weight of the yarn carrier together with the weight of the Anpresshebelarms torque is exerted about the pivot point of the Anpresshebelarms, whereby a contact force of the yarn carrier is produced on the pressure roller. This contact force increases with increasing weight of the yarn carrier during the winding of a yarn on the yarn carrier.
• the contact pressure is the cause responsible for the quality of yarn spooling on the finished bobbin.
• Any fluctuation of the contact force leads to an irregularity of the winding density, which can lead to yarn breaks or quality fluctuations, eg color irregularities in dyeing processes in subsequent processes in which the yarn package serves as a supply spool. Regardless of the drive of the yarn carrier therefore a controlled contact force as possible between the yarn carrier and the pressure roller must be generated.
• the contact pressure should be definable according to a predetermined Anpresskraftverlauf from the beginning of the Aufspulreareaes to its end, for example, according to a constant course.
• the contact force should gradually decrease towards the end of the winding process.
• the contact pressure is only generated by the weight of the Anpresshebelarms and possibly attached thereto other elements and the empty yarn carrier.
• the actuator provides the missing force (actuator force) for generating the desired value. The latter is often necessary at the beginning of the winding process in a so-called loading phase.
• the actuator During winding, the weight of the yarn carrier increases by the weight of the yarn wound thereon. In order to keep the contact pressure constant, the actuator must continuously spend correspondingly less actuator force. If, for example, towards the end of the winding process, the weight becomes too large, the actuator in a release phase must press the Anpresshebelarm against gravity in the opposite direction of the original actuator force to reduce the contact pressure by a portion of the weight. As the diameter of the yarn package increases with yarns being wound thereon, it may further be necessary for the actuator to raise the pressure lever arm to a higher position raises to avoid over-squeezing the bobbin.
• the actuator force to be expended by the actuator thus varies continuously, in accordance with the actual weight of the yarn package, which increases quadratically with its diameter in order to keep the contact pressure constant, for example.
• the actuator is usually designed as a mechanical component, for example with one or two pneumatic cylinders, wherein the actuator is attached to the Anpresshebelarm such that it directly exerts the Aktuatorkraft on the Anpresshebelarm.
• the contact force is provided by exerting a torque about the pivot point of the Anpresshebelarms, or by directly exerting Aktuatorkraft on the Anpresshebelarm.
• a direct force measurement and / or an indirect force measurement for example via the position of the Anpresshebelarms, necessary to regulate the torque, or the contact force.
• the contact force is measured by means of a sensor and the output signal of the sensor is used as a controlled variable for controlling the actuator.
• an indirect force measurement can be concluded, for example, from the position of the Anpresshebelarms on the diameter of the yarn package and thus with known yarn weight on the weight of the yarn package.
• a disadvantage of known winding devices is that the structure of the winding device is complicated and expensive by the need for controlling the contact force sensor. The measurement of the contact pressure is more error-prone and inaccurate.
• the invention is based on the object, a device for winding of
• the actuator has an electric motor with a sensorless motor control, wherein the motor control is set to regulate a torque which is to be exerted by the electric motor on the Anpresshebelarm, according to a predetermined torque curve.
• the motor control is set to regulate a torque which is to be exerted by the electric motor on the Anpresshebelarm, according to a predetermined torque curve.
• Such motors are known from the prior art. These are, for example, brushless, in particular direct current, motors, linear motors or stepping, for example hybrid stepping motors, which can control the position of their motor axis and the torque applied by the motor axis by means of their motor control itself. Examples of such motors are disclosed in the publications WO 2004/036732 A1, WO 02/078152 A1 and / or WO 03/036787 A1.
• the winding device according to the invention allows an efficient and precise control of the contact pressure, with a simplification of the entire arrangement of the winding device by eliminating any kind of sensors in the field of the winding device. In addition, the manufacturing cost and the spatial dimension of the winding device are reduced.
• the accuracy of the control of the contact force is increased compared to the prior art, during the entire Aufspulreas the desired torque curve can be accurately and actively controlled. There is no so-called stick-slip effect, ie even small changes in the position of the actuator can be set accurately even at very low speed.
• the motor axis can be accurately positioned in the case of its execution as a rotation axis (motor shaft), for example, to a sixteenth turn.
• the electric motor can be full even at standstill Provide torque.
• the absolute position of the motor axis is known at all times, which allows an exact forward and backward movement of the motor axis.
• the motor is particularly preferably a synchronous motor with permanent magnet with a motor control according to the document DE 698 05 641 T2.
• the command control by the motor control of the permanent magnet synchronous motor without a direct sensor, that is to say without a probe based on the Hall effect or an optical transmitter, comprises the following working steps, wherein the synchronous motor has at least one phase, one winding and one rotor:
• the engine control is preferably set up to adjust the product from the value of the electric current flowing through the electric motor and the voltage applied to the electric motor for controlling the torque. By changing this product can be directly closed to the torque currently applied by the electric motor, the motor control can be constructed only of components of an electrical circuit. There is also no additional wiring of the electric motor necessary.
• the pressure roller may be advantageously configured to drive the rotation of the yarn carrier receptacle via the yarn carrier. This has the advantage over the possibility of a direct drive of the Garnunfact that the Press roller has a fixed position on a yarn processing machine, that is mounted fixed in position, so that a very simple structure is possible to drive the pressure roller.
• means are provided for determining the yarn carrier weight, wherein the motor controller is adapted to control the torque of the electric motor such that the sum of the force exerted by the electric motor on the Anpresshebelarm torque and the yarn carrier weight on the Anpresshebelarm torque applied to the predetermined torque curve, or a predetermined contact force, corresponds, is preferably kept constant. This achieves a uniform density of the yarn wound on the yarn carrier.
• the yarn package thus created is particularly well suited as a supply spool for subsequent processes.
• the means for determining the yarn carrier weight are preferably set up to determine a rotational speed of the yarn carrier receptacle and to determine the yarn carrier weight via the rotational speed.
• the rotational speed of the yarn carrier recording already contains the information about the current diameter of the yarn carrier with the yarn wound thereon.
• the tangential velocity of the pressure roller is equal to
• Position was determined. This process is repeated in a control loop during the entire winding process. It is important in particular with DTY (Draw-Texture-Yarn) yarns that the length of the yarn wound on the yarn package is highly dependent on the tension of the yarn, i. the tension of the yarn must be adjusted according to the length of the yarn wound on the yarn package.
• DTY Draw-Texture-Yarn
• a particularly compact design of the winding device according to the invention is achieved in that the actuator has a worm gear, wherein the worm gear at the pivot point of the Anpresshebelarms with the Anpresshebelarm comes into engagement and the torque of the electric motor for rotating the Anpresshebelarms on the worm gear on the Anpresshebelarm is transferable.
• the torque applied by the worm gear is transmitted, for example via a gear which is fixed to the Anpresshebelarm and is rotatably mounted with its center at the pivot point of the Anpresshebelarms on the Anpresshebelarm. This torque can be controlled directly by the engine control.
• the actuator may include torque transmitting means, wherein preferably the torque transmitting means between the outer and inner ends of the Anpresshebelarms, preferably centrally, with the Anpresshebelarm engage and the torque of the electric motor for rotating the Anpresshebelarms on the torque transmitting means on the
• Anpresshebelarm is transferable.
• the torque transmitting means e.g. a belt can also be fixed at the end of the Anpresshebelarms.
• This configuration has the advantage that the lever arm for transmitting the torque from the electric motor, or a force applied by the electric motor, on the Anpresshebelarm is cheaper. That the force to be expended by the electric motor is less for the same torque to be applied because a lever acts through the distance between the pivot point of the pressure lever arm and the position where the torque transmitting means engages the pressure lever arm.
• the torque transmission means may comprise a belt, preferably a toothed belt, or a screw spindle, which are drivable by the electric motor.
• the electric motor can be designed as an electric motor with a rotatable motor axis in the usual way. The rotational movement of the motor axis is converted into a tensile or compressive movement. The torque exerted by the rotatable motor axis is controlled.
• a yarn processing machine has at least one winding device according to the invention.
• FIG. 1 shows a first embodiment of a device according to the invention
• Winding device with a worm gear Winding device with a worm gear.
• FIG. 2 shows a further embodiment of a rewinding device according to the invention with a belt as torque transmission means.
• FIG. 3 shows a further embodiment of a device according to the invention
• Winding device with a screw as a torque transmitting means Winding device with a screw as a torque transmitting means.
• FIG. 4 shows a further embodiment of a device according to the invention
• Winding device wherein the torque transmission means are designed as an axis of a linear motor.
• FIGS. 1 to 4 each show a winding device 1 according to the invention.
• a yarn carrier 3, 4 is arranged in a yarn carrier receptacle mounted rotatably about its longitudinal axis.
• An Anpresshebelarm 6.7 is rotatably mounted in the region of its radially inner end at a pivot point The Anpresshebelarm 6.7 is rotatable by means of an active actuator 12 about the pivot point 10, that is pivotable.
• the Garnlieness is arranged rotatably at an outer end of the Anpresshebelarms 6,7 perpendicular to Anpresshebelarm 6,7.
• a pressure roller 15 supports the arranged in the Garnyesfact yarn carrier 3.4 off.
• the pressure roller 15 takes on the weight of the Anpresshebelarms 6.7 Garnliefact and the yarn carrier 3.4 with yarn wound thereon 17 and the given case by the actuator 12 on the Anpresshebelarm 6.7 torque exerted generated pressing force F, represented by an arrow , on.
• the pressure roller 15 can be driven by means of an electric motor, not shown.
• the yarn 17 is guided over a yarn guide 18, for example a laying, between the pressure roller 15 and the yarn carrier 3, 4.
• the actuator 12 has an electric motor 20 with a sensorless motor control.
• the engine controller is configured to control a torque to be applied by the electric motor 20 to the Anpresshebelarm 6,7, according to a predetermined torque curve.
• the Anpresshebelarm 6,7 is shown in two positions.
• the arranged in the Garnippofact yarn carrier 4 of the Anpresshebelarms 7 in the first position at the beginning of Aufspulreas is still empty.
• the yarn carrier 3 is full, i. on the yarn carrier 3, the yarn 17 is wound to form a yarn package.
• FIG. 1 shows a rewinding device 1 according to the invention with an actuator 12 which has a worm gear 25.
• the worm gear 25 is driven directly by the motor axis of the electric motor 20.
• Worm gear 25 comes at the pivot point 10 of the Anpresshebelarms 6.7 with the Anpresshebelarm 6.7 for engagement and the torque T of the electric motor 20 for rotating the Anpresshebelarms 6.7 is transmitted via the worm gear 25 to the Anpresshebelarm 6.7.
• the torque T applied by the worm gear 25 is transmitted to the pressure lever arm 6, 7 via a toothed wheel 26, which is fastened to the pressure lever arm 6, 7 and is rotatably mounted with its center at the pivot point 10 of the pressure lever arm 6, 7.
• the Garnlieness is rotatably disposed at the outer end of the Anpresshebelarms perpendicular to Anpresshebelarm.
• FIG. 2 shows a further embodiment of a rewinding device 1 according to the invention with an actuator 12 which has a belt 30 as a torque transmission means.
• the belt 30 passes around the motor axis of the electric motor 20 and a pulley 32 fixed to a yarn processing machine.
• the belt 30 engages centrally between the outer and inner ends of the Anpresshebelarms 6.7 via a belt 34 attached to the Anpresshebelarm 6.7, or in the case of a toothed belt via a gear with the Anpresshebelarm 6.7 for engagement.
• the torque T represented by two bent arrows, of the electric motor 20 for rotating the Anpresshebelarms 6.7 is thereby transmitted via the belt 30 on the Anpresshebelarm 6.7.
• FIG. 3 shows a further embodiment of a rewinding device 1 according to the invention with an actuator 12, which has a screw spindle 40 as torque transmission means.
• the screw 40 is designed as an extension of the motor axis of the electric motor 20.
• the screw spindle 40 comes centrally between the outer and the inner end of the Anpresshebelarms 6.7 via a arranged on the Anpresshebelarm 6.7 nut thread 42 with the Anpresshebelarm 6.7 for engagement.
• the electric motor 20 is pivotable in an advantageous manner to a motor attachment 44 a
• FIG. 4 shows a further embodiment of a rewinding device 1 according to the invention with an actuator 12 whose electric motor 20 is designed as a linear motor with an axis 50 of the linear motor Torque transmission means.
• the axis 50 of the linear motor is centered between the outer and the inner end of the Anpresshebelarms 6.7 with the Anpresshebelarm 6.7 for engagement.
• the axis 50 is pivotally mounted in the region of its remote end on the Anpresshebelarm 6.7.
• the linear motor is also advantageously pivotable on a
• the actuator 12 has an electric motor 20 with a sensorless motor control, wherein the

Landscapes

• Tension Adjustment In Filamentary Materials (AREA)
• Winding Filamentary Materials (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34937800

Family Applications (1)

Country Status (3)

Families Citing this family (5)

Citations (4)

Family Cites Families (2)

• 2005
  • 2005-07-08 EP EP05014825A patent/EP1741655A1/de not_active Withdrawn
• 2006
  • 2006-07-06 WO PCT/EP2006/006587 patent/WO2007006475A1/de not_active Application Discontinuation
  • 2006-07-06 CN CNA200680024859XA patent/CN101247997A/zh active Pending
  • 2006-07-06 EP EP06762444A patent/EP1910204A1/de not_active Withdrawn

Patent Citations (4)

Also Published As

Similar Documents

Legal Events