JP4773206B2 - Method and apparatus for operating a work site of a textile machine for manufacturing a traverse bobbin - Google Patents

Description

  The invention relates to a method for operating a working part of a textile machine for producing a traverse bobbin as described in the superordinate concept of claim 1 and to an apparatus for carrying out the method described in claim 5.

  In order to produce a fiber bobbin, as is well known, it is necessary on the one hand to rotate the fiber bobbin, and on the other hand, it is necessary to traverse the yarn wound on the bobbin along the bobbin axis. In this case, so-called traverse winding can be formed by traversing the yarn at a relatively high speed. Such a traverse bobbin is not only excellent in that the wound body is relatively stable, but also has an advantage of good unwinding characteristics. Such winding method of the winding bobbin can be divided into a wild winding method and a precision winding method or a step precision winding method.

  In this case, in particular in connection with the wild winding method, a so-called yarn guide drum is used, which not only gives the traverse movement to the wound yarn, but at the same time forms a circumferential drive for the traverse bobbin.

  Of course, such yarn guide drums cannot be used to form precision or step precision windings. This is because in the case of manufacturing by this winding method, the driving of the traverse bobbin and the driving of the yarn traversing device must be performed separately. That is, when manufacturing a traverse bobbin with a precision or step precision winding method, the traverse bobbin is driven by a separate bobbin driving device, and the yarn to be wound is fed by an additional, individually driven yarn traversing device. It is threaded.

  In order to perform yarn traversing at high speed and with high positional accuracy, a yarn guide that can move parallel to the rotation axis of the traverse bobbin is coupled to a single drive device that can be reversibly connected via a pulling means. An apparatus or a so-called finger thread guide or a device that operates as a wiper, that is, a thread guide having a finger-shaped yarn feeding lever that can be swung over a predetermined angular region about an axis arranged perpendicular to the traverse bobbin axis The working device has proven to be suitable.

  DE 10021963A1 discloses a working part of a textile machine for manufacturing a traverse bobbin, in which a wound tube rotatably held on a bobbin frame is rotated by a driving roller having an individual driving device. Are listed. The working part further comprises a traversing yarn guide which can be reciprocated in a traversing stroke whose length can be changed by a single drive fixed to the endless belt and defined and controllable. In this case, the single drive device for the traverse yarn guide is connected to an angle signal generator which detects the rotor position of the electric motor and informs the control device. Of course, DE 10021963 A1 does not contain a detailed description of the exact configuration and operation of the angle signal generator used.

  Also, DE 1985858548A1 discloses a work site for a textile machine for manufacturing a traverse bobbin, in which the bobbin drive device and the yarn traverse device have separate drive devices. is there. In this case, the yarn traversing device is loaded by an electromagnetic driving device. The electromagnetic driving device of the yarn guide driving device is controlled by a microprocessor. This microprocessor adjusts the current intensity and the current direction in relation to the angle and time according to a predetermined program so that the desired yarn feed angle is produced over the traverse width or the traverse width or traverse point is adjusted according to the purpose. To be controlled. In this case, in order to detect the instantaneous angle, an infrared box that scans a mark arranged coaxially with respect to the pivot axis is used. Such an optical sensor device is of course completely free of problems since it is often loaded with air containing dust and lint in spinning and winding operations. That is, such an optical sensor device requires a relatively high cleaning cost in order to work with almost no failure.

  DE 103 454 587 published after the filing of the present application describes a working part of a textile machine for manufacturing a traverse bobbin, a bobbin frame for holding a rotatable winding bobbin, and a traverse motion on a supplied yarn. A working site is described having a finger yarn guide for imparting. The electromagnetic single drive of the finger thread guide comprises an angle sensor, which is connected to the work site calculator and has a permanent magnet that is pivotably supported and a stationary Hall-IC-element. Yes. Such an angle sensor has several advantages. A relatively inexpensive analog Hall-IC-element influenced by the magnetic flow of a pivotable permanent magnet is, for example, proportional to the angular position of the permanent magnet and thus the angular position of the finger thread guide and A voltage value that can be suitably processed by the work site calculator is generated. Furthermore, the voltage signal transmitted during the traverse movement of the yarn feeding lever of the yarn guide has a substantially linear course in the region between about −40 ° and + 40 ° covered by the yarn guide. Furthermore, such an angle sensor has the advantage that it has a long life because it works without contact and thus without wear. Further preferred is that such an angle sensor has a relatively small moment of inertia and can therefore be reliably used at high traverse speeds.

The disadvantage of this highly evaluated angle sensor is that, in principle, an inevitable error effect occurs over time. For this inevitable error effect, the heat dissipation or permanent magnet aging process must be considered.
DE10021963A1 Specification DE19858548A1 Specification DE 10354587 Specification

  Starting from the above-mentioned prior art, the object of the present invention is to provide a method or device which enables an orderly operation of the working part of a textile machine for producing a traverse bobbin over a long period of time. In this case, in particular, it is desired that the measured value of the yarn guide angle sensor has a high accuracy over the life of the apparatus.

  The object of the present invention has been solved by a method according to claim 1 or an apparatus according to claim 5.

  Advantageous embodiments of the inventive method or the inventive device are described in the dependent claims.

  By means of the method according to the invention, the measured values of the angle sensor are prevented from being altered slowly and thus secretly over time due to error effects that are inevitable in principle, such as heat dissipation or permanent magnet aging. In other words, the measurement value transmitted from the sensor element is compared periodically with respect to the defined position of the thread guide and / or in relation to the event, so that the influence of the error is reliably recognized, for example by a work site calculator Considered accordingly.

  As indicated in claim 2, the thread guide is first moved sequentially into two defined positions in order to determine the corresponding measured value of the sensor element.

  One measured value is then generated by each sensor element at this defined position. The detected measurement values are compared in a work site calculator and / or processed to calculate a modified characteristic line of the sensor element. The correction characteristic line calculated by the work site calculator represents the progress of the measured value of the voltage generated by the sensor element when the yarn guide traverses between its reversal points.

  As shown in claim 3, during the winding process, the work site calculator correlates the corresponding position of the yarn guide with each voltage generated by the sensor element in accordance with the correction characteristic line. This position is then used to control the yarn guide.

  In an advantageous configuration, the calculated corrected characteristic line is used at least until the next adjustment, as indicated in claim 4. That is, in the next adjustment, the corrected characteristic line is calculated again by the work site calculator based on the measurement value existing at that time. When the computer calculates a new corrected characteristic line, it is replaced with this new corrected characteristic line.

  According to claim 5, the device for carrying out the method according to the invention, in an advantageous configuration, comprises a yarn traversing device that can be loaded by a single drive device, an angle sensor with a Hall-IC-element, And a work part calculator. In this case, the angle sensor transmits a measurement value proportional to the yarn guide each time. Furthermore, means are provided which allow the yarn guide to be positioned at a defined position. In other words, there is a precisely defined position where the measurement value transmitted from the angle sensor is adjusted to a known yarn guide position.

  As defined in claim 6, the work site calculator is configured so that the work site computer immediately couples each voltage generated from the Hall-IC-element of the angle sensor with the corresponding position of the yarn guide. Yes. In this manner, the work site calculator can suitably control the yarn guide, particularly with respect to its turning point.

  In an advantageous embodiment, the thread guide is configured as a finger thread guide, as defined in claim 7. The yarn supply lever of the finger yarn guide can be positioned at the prescribed angular positions by contacting the two stoppers. At this so-called adjustment position, the measurement value generated by the Hall-IC-element of the angle sensor is detected and used to calculate the correction characteristic line of the angle sensor in the work site calculator. The correction characteristic line calculated by this work site calculator characterizes the instantaneous course of the voltage generated by the angle sensor during the traverse movement of the yarn feeding lever at this point. In other words, depending on the work site calculator, when each angular position of the yarn feeding lever is detected, an error effect based on a certain degree of aging of the permanent magnet is taken into account by the configuration principle of the angle sensor.

  In an advantageous embodiment as claimed in claim 8, the area that can be covered during calibration by the angle sensor is located between + 40 ° and −40 °. That is, this region is somewhat larger than the region between + 37.5 ° and -37.5 ° that the yarn guide lever of the yarn guide covers during winding operation. By setting the area that can be covered by calibration as large as described above, for example, an assembling error that occurs when, for example, a thread guide driving device is installed is reliably compensated. Furthermore, the positioning by the defined abutment at + 39 ° and −39 ° allows the adjustment of the measured value transmitted from the angle sensor and the known angular position of the yarn feeding lever of the yarn guide in a simple manner. In other words, when the yarn feeding lever comes into contact with the stopper, the measured value emitted from the angle sensor always corresponds to the same angular position, and the deviation in this measured value is inevitable in principle due to the error effect of the angle sensor. Is attributed to This error influence is taken into account when the correction characteristic line is calculated by the work site calculator.

  In another advantageous configuration, the angle sensor has a resolution of 0.024 ° (claim 9). Such a high resolution of the angle sensor makes it possible to reach the yarn reversal point accurately during the yarn traversing movement, and thus a high-quality bobbin structure.

  FIG. 1 schematically shows a working part 2 of a textile machine for manufacturing a traverse bobbin, in this case a so-called automatic traversing machine 1, in a side view. In such a work part 2 of the automatic traverse winding machine 1, a spinning cup 3 manufactured by a ring spinning machine is wound around a large volume traverse bobbin 5 in a form that is publicly known and not described in detail. returned. After manufacturing, the traverse bobbin 5 is handed over to the machine-length traverse bobbin transfer device 7 using a service device (not shown) that operates automatically, for example, and the bobbin loading station disposed on the machine end side or the same Carried to something similar. Such an automatic traversing machine 1 usually further has a bobbin and a winding tube conveying system 6. In the bobbin and the winding tube transfer system 6, the transfer tray 11, the spinning cup 3 or an empty winding tube circulates. Of the bobbin and the winding tube conveyance system 6, only the cup supply section 24, the horizontal conveyance section 26 leading to the winding part 2, and the winding pipe return section 27 are shown in FIG. 1.

  Furthermore, the individual work sites 2 have various devices which are only schematically shown for the purpose of being known and which ensure the orderly operation of such work sites. One of these devices is, for example, a winding device 4. The winding device 4 has a winding frame 8 that is movably supported around a turning axis 12. According to the illustrated embodiment, the traverse bobbin 5 contacts the drive drum 9 on its surface during the winding process and is entrained via a frictional connection by this single drive motor driven drum 9. . This corresponding drive is shown at 33.

  A yarn traversing device 10 is provided to provide traversing interlocking to the yarn during the winding process. The yarn traversing device 10 shown only schematically in FIG. 1 has a yarn guide 13 with a yarn feeding lever 45 configured in a finger shape, for example. The yarn feeding lever 45 is loaded by the electromechanical driving device 14 to give the yarn 16 a traverse motion between both end faces of the traverse bobbin 5. In this case, the drive device 14 for the yarn guide 13 is fixed to the winding part casing 34 of the work part 2 via, for example, a bracket (not shown). Further, the drive device 14 for the yarn guide 13 and the drive device 33 for the drive drum 9 are connected to the work site calculator 28 via the control lead wire 15 or 35.

  For example, as can be seen from FIG. 2, the driving device 14 has a motor shaft 17, and a yarn feeding lever 45 configured in a finger shape is disposed on the motor shaft 17 so as not to be relatively rotatable. An angle sensor 19 is attached to the motor shaft 17 on the side opposite to the yarn guide 13 so as to be protected under a removable cover cap 18. The structure of the angle sensor 19 will be described in detail later.

  As shown in FIG. 2, the plastic molded portion 31 is fixed to the casing 39 of the driving device 14 on the side opposite to the yarn feeding lever 45. This plastic molded part 31 has a fixing hole 36 for the sensor holder 23 and a support pin 37 for a plate 38 with an electronic circuit 32. In this case, the electronic circuit 32 can have, for example, a memory chip and an electronic control device. A Hall-IC-element 29 is fixed to the sensor holder 23 in a stationary manner. The Hall-IC-element 29 cooperates with the permanent magnet 20. The permanent magnet 20 is coupled to the motor shaft 17 of the driving device 14 through a support ring 21 and a screw pin 22 so as not to be relatively rotatable.

  FIG. 3 shows a rear view of the driving device 14. That is, the section III-III in FIG. 2 is shown. As shown in the figure, the permanent magnet 20 is configured as a ring magnet that is dipole magnetized in the radial direction. The poles N and S of this ring magnet are arranged perpendicular to the stationary Hall-IC-element 29 when the yarn guide 13 is in the center position shown in the drawing, that is, at an angular position of 0 °. That is, when the yarn guide 13 takes an angular position of 0 °, the poles N and S of the magnet ring 20 are oriented at right angles to the Hall-IC-element.

  FIG. 4 shows the yarn traversing device 10 as viewed from the direction of the arrow X in FIG. 1 while adjusting the angle sensor 19. As shown in the drawing, a stopper 40 or 41 is inserted into a hole defined and arranged in the front plate 44 of the yarn guide driving device 14. These stoppers 40 or 41 accurately define a predetermined angular position of the yarn feeding lever 45. In this case, while adjusting the stoppers 40, 41, the yarn feeding lever 45 contacting the stopper 40 has an angular position of exactly -39 ° while the angular position of the yarn feeding lever 45 in the stopper 41 is precisely adjusted. Positioned to be + 39 °. The voltage V generated by the Hall-IC-element 29 when the yarn feeding lever 45 is in contact with the stopper 40 or 41 is processed by the electronic circuit 32 of the angle sensor 19, and the work site is transmitted via the data and control lead 15. It is sent to the computer 28. The work site calculator calculates a corrected characteristic line from this voltage when necessary. Each measured value can be made to correspond to a predetermined angular position of the yarn feeding lever 45 based on this correction characteristic line.

  The characteristic lines 42, 43 shown on the basis of the coordinate system in FIG. 5 are the electrical lines generated by the programmable Hall-IC-element 29 in relation to the yarn feed lever 45 and thus the angular position of the permanent magnet 20. The voltage course is shown. In this case, the abscissa of the coordinate system indicates the area that can be covered by the yarn feeding lever 45 during the yarn traverse movement, while the ordinate of the coordinate system shows the Hall-IC-element 29. The voltage originating from is shown in volts. That is, the voltage V is a voltage generated by the Hall-IC-element 29 from the magnetic current of the permanent magnet 20, its angular position, and the device coefficient.

  In this case, reference numeral 43 denotes a characteristic curve of the voltage course of the angle sensor 19 generated at the start of use of the angle sensor after the calibration of the angle sensor 19. In the illustrated embodiment, according to the characteristic line 43, when the angular position of the yarn feeding lever 45 is −39 °, for example, a voltage of 0.71 V acts on the angle sensor 19. When the angular position of the yarn feeding lever 45 is + 39 °, the equivalent voltage at the angle sensor is 194.83V. As shown on the characteristic line 43, the voltage course in the traversing region between −39 ° and + 39 ° covered by the yarn feeding lever 45 is substantially linear. Therefore, at the central position 0 ° of the yarn feeding lever 45, a voltage of 2.76 volts, for example, is generated in the angle sensor 19.

  A characteristic line 42 indicates a voltage curve detected when the angle sensor 19 is adjusted later. In this embodiment, the voltage generated at the angular position of the yarn feeding lever 45 of −39 ° during this adjustment is 0.56V. When the angular position of the yarn feeding lever 45 is + 39 °, 4.47 V is generated. Since the characteristic line 42 also has a substantially linear course, for example, a voltage of 2.48 volts is generated at the central position 0 ° of the yarn feeding lever 45.

  For example, the angle sensor 19 can achieve a resolution of 0.024 °.

  The angle sensor 19 must first be calibrated before starting the operation of the yarn guide drive 14 at the work site 2. When calibrating the angle sensor 19 in the mounted drive device 14, various methods described in relatively detail in DE 103 454 587 published after the filing of the present application can be used.

  In this calibration method, for example, the magnetic characteristic line of the permanent magnet 20 of the angle sensor 19 is measured based on the specified angular position of the yarn feeding lever 45 of the yarn guide 13. That is, the yarn feeding lever 45 is positioned at a predetermined angular position using a simple mechanical device, for example, two stoppers 40 and 41, and the magnetic current of the permanent magnet 20 in the Hall-IC-element 29 is determined. The generated voltage is detected based on. The work part calculator 28 of the corresponding winding part 2 calculates the first characteristic line for the angle sensor 19 based on the known position of the yarn feeding lever 45 and the measured value detected by the angle sensor. This first characteristic line is indicated by reference numeral 43 in the coordinate system of FIG. As shown in FIG. 5, each point of the characteristic line 43 is associated with a predetermined angular position of the yarn feeding lever 45 and a corresponding measurement value of the angle sensor 19. When the yarn feeding lever 45 is in the center position, that is, at the angular position 0 °, the corresponding measured value of the angle sensor is 2.76 V, for example.

  The adjustment method of the present invention is carried out as follows.

  Since the characteristic line of the angle sensor 19 changes in principle with the passage of time, for example due to aging of the permanent magnet of the angle sensor 19 or due to heat dissipation or the like, a measured value of 2.76 V, for example, is predetermined. Only corresponds to the angle position of 0 ° of the yarn feeding lever 45 only for the period of time. In order to be able to guarantee an accurate measurement of the angle sensor 19 over a longer time, the angle sensor 19 is adjusted over time. In the second calibration method, the magnetic characteristic line of the permanent magnet 20 is measured again. This can be done with an external calibration device or at the work site. The correction value obtained next is stored in the working part calculator 28 of the winding part or in a memory chip (not shown) of the electronic circuit 32 of the angle sensor 19.

  That is, for example, the yarn feeding lever 45 is again sequentially applied to the defined stoppers 40 and 41, and the measurement value emitted from the angle sensor 19 is detected at this angular position. From this detected measurement value, the work site calculator 28 calculates a corrected characteristic line 42 as shown in FIG. This correction characteristic line 42 also has a linear course. Further, a predetermined angular position of the yarn feeding lever 45 is made to correspond to each point of the correction characteristic line 42, and a corresponding measured value of the angle sensor 19 is made to correspond with a bolt. In the correction characteristic line 42 shown as an example in FIG. 5, for example, a measured value of 0.56 V corresponds to the angular position of the yarn feeding lever 45 of −39 °. At the central position 0 ° of the yarn feeding lever 45, a measured value of 2.48V is generated in the angle sensor 19, whereas at the angular position of + 39 ° of the yarn feeding lever 45, the measured value of the angle sensor 19 is, for example, 4.47V. Become.

  The corrected characteristic line 42 of the angle sensor 19 maintains the reference until the next adjustment and is then replaced with a new corrected characteristic line determined by appropriate adjustment as well.

The working part of a textile machine for manufacturing a traverse bobbin of the type having a bobbin driving device and an individual yarn guide driven by a single motor type, the yarn guide driving device being provided with an angle sensor The figure shown in FIG. Sectional drawing of the angle sensor arrange | positioned on the axis | shaft of a thread | yarn guide drive device. FIG. 3 is a cross-sectional view of the angle sensor along line III-III in FIG. 2. The figure which looked at the finger thread guide from the direction of arrow X while adjusting an angle sensor. Angle position / output voltage-diagram during adjustment of the angle sensor.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Automatic traverse winding machine, 2 Work part (winding part), 3 Spinning cup, 5 Traverse bobbin, 6 Bobbin and winding tube conveyance system, 7 Traverse bobbin conveyance device, 8 Bobbin frame, 9 Drive drum, 10 Yarn twill Swing device 11 Transport tray 12 Rotating shaft 13 Thread guide 14 Drive device 15 Control wire 16 Thread 17 Motor shaft 18 Cover cap 19 Angle sensor 20 Permanent magnet 21 Support ring 22 Screw pin 23 sensor holder, 24 cup supply section, 25 stock section, 26 lateral conveyance section, 27 winding tube return section, 28 work site calculator, 29 hall-IC-element, 31 plastic molding part, 32 circuit, 33 drive device, 34 Winding part casing, 35 control lead, 36 fixed , 37 bearing pin, 38 plate, 39 casing, 40 a stopper, 41 a stopper, 42 characteristic line 43 characteristic line 44 front plate, 45 the yarn feeding lever

Claims (8)

A bobbin frame (8) for holding a rotatable winding bobbin, a yarn traversing device (10) that can be driven by an individual motor type, and a calibration value that transmits a measurement value proportional to the position of the yarn guide In a method of operating a work site of a textile machine for producing a traverse bobbin comprising a sensor element (19) ,
The order of the sensor element (19) by adjusting between the measured value transmitted from the sensor element (19) and the defined position of the thread guide (13) at a predetermined time interval and / or in connection with the event. In order to guarantee the correct work format and to detect the measured value of the sensor element (19), the thread guide (13) is sequentially moved to a plurality of predetermined positions during winding interruption, and at these predetermined positions, respectively. The measurement value of the sensor element (19) is detected, and the detected measurement value is processed by the work site calculator (28) to calculate the corrected characteristic line (43) of the sensor element (19). , A method of operating a work site of a textile machine for manufacturing a twill-wound bobbin. During the winding process, the work site calculator (28) is associated with the corresponding position of the thread guide (13) corresponding to the correction characteristic line (43) of the voltage (V) generated by the sensor element (19). , the position is used to control the thread guide (13), the method of claim 1, wherein. 3. The method according to claim 2 , wherein the calculated modified characteristic line (43) is used until the next adjustment of the sensor element (19).   2. The apparatus for carrying out the method of claim 1 wherein the single drive of the yarn traversing device (10) comprises a calibrated angle sensor with a Hall-IC-element, the angle sensor being a work site calculator. Means (40) for transmitting a measurement value which is connected and proportional to the position of the yarn guide and which enables the yarn guide to be positioned in a defined and reproducible position in the region of the yarn traversing device (10) , 41). A device for operating a work site of a textile machine for producing a traverse bobbin. The work site calculator (28) couples each voltage (V) generated from the Hall-IC-element (29) of the angle sensor (19) with the corresponding position of the thread guide (13). The apparatus of claim 4 , wherein (28) is configured. The yarn traverse device (10) is configured as a finger yarn guide (13), and the yarn feeding lever (45) of the finger yarn guide (13) abuts against the stoppers (40, 41), thereby defining a specified angular position. 5. The device of claim 4 , wherein the device is positionable. The angle range that can be covered by calibration by the angle sensor (19) is between + 40 ° and −40 °, and the stoppers (40, 41) on which the yarn feeding lever (45) is positioned for adjustment are each + 39 °. The apparatus of claim 6 , wherein the apparatus is arranged at −39 °. The device according to claim 4 , wherein the angle sensor has a resolution of 0.024 °.

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