DE102011016929A1 - Winding machine for use in spinning system for winding fresh spun synthetic threads into coils, has measuring device comprising distance contour cooperating with distance sensor without contact and formed on revolver or roller carrier - Google Patents

Abstract

The machine has two drivable winding spindles (3.1, 3.2) for accommodating and winding coils (5). A winding revolver (1) is rotatably supported in a machine frame (2), and guides the spindles alternately into a winding region and a changing region by rotation. A pressure roller (6) is attached to the spindles in the winding region, and is held on a movable roller carrier (20). A measuring device (11) detects vibrations occurring at the spindles, and has a distance contour (13) cooperating with a fixed distance sensor (11.1) without contact and formed on the revolver or roller carrier. The distance sensor is formed as a contact-less induction sensor. An independent claim is also included for a method for controlling and/or monitoring a winding machine.

Description

The invention relates to a winding machine for winding threads into coils according to the preamble of claim 1 and to a method for controlling and monitoring a winding machine according to the preamble of claim 8.

A generic winding machine and a generic method for controlling and monitoring a winding machine are from the WO 1996/033939 known.

The known winding machine is used in spinning systems for winding up freshly spun synthetic threads. Typically, a group of filaments are wound together after spinning and drawing in parallel with spools. For this purpose, the winding machine has two discharging winding spindles, which are held offset from one another on a rotatable winding turret. The winding spindles are guided by the spool turret alternately into a winding area and into a changing area. At the winding spindle held in the winding area, the group of threads is wound parallel to the coils. The winding spindle cooperates with a pressure roller, which rests on the circumference of the wound coils. The pressure roller is held on a movable roller wheels, which in this case performs the evasive movement to grow the coils. The coils are held next to each other on the winding spindle. In such melt spinning processes high yarn speeds are achieved, which can be more than 6000 m / min. In this case, the winding spindle held in the winding area is driven at a speed which results in a substantially constant peripheral speed of the bobbins and thus a constant take-up speed. Depending on the diameter of the coils, the winding spindle is driven in a speed range from about 2000 rpm to about 30,000 rpm when winding up the threads. At such high speeds, therefore, the least imbalance phenomena on the winding spindle lead to unwanted vibrations. In principle, although it is known to previously dynamically balance the winding spindles without load of the spools, this does not allow unforeseen disturbances in the structure of the spools during winding, for example due to yarn tension fluctuations, to be detected.

In order to detect the vibrations occurring during operation on the winding spindles, the known winding machine on a measuring device. The measuring device has per winding spindle to an acceleration sensor which is arranged directly on a spindle carrier of the winding spindle. The measuring signals are transmitted by a rotary transformer or by radio signals to a measuring station, in which an evaluation of the measuring signal is feasible. The known winding machine and the known method for monitoring the winding machine based on the fact that the measurement signals from the rotating Spulrevolver on which the winding spindles are held, is transmitted to a stationary measuring station. Here are additional disturbing influences, on the one hand directly from the vibration excitation result and on the other hand act by external influences, inevitable.

For monitoring a winding spindle, however, other systems are known, such as in the DE 10156454 A1 described.

In the known winding machine, a distance sensor is associated with each of the winding spindles in order to monitor a distance between a chuck and an axis of the winding spindle. Here, the measurement signals of the distance sensor are also transmitted without contact from the winding turret to a stationary measuring station. Thus, disturbances by the signal transmission from a rotating component to a stationary measuring station are also possible here.

Furthermore, from the DE 100 46 603 a winding machine is known in which the pressure roller is held on a pivotable rocker on which acts a damping means for vibration damping. The damping means is adjustable via a control device, wherein the control device is coupled to a vibration sensor. The vibration sensor is attached to the rocker, so that the damping means is adjustable in dependence on the instantaneous vibration conditions of the rocker.

In the known winding machine thus the vibrations are detected on the rocker by a vibration sensor to change the rigidity of the pressure roller during the winding of the coils. However, inadmissible vibration states would not be detected and only lead to the stiffening of the system.

It is therefore an object of the invention to develop a generic winding machine of the type mentioned in such a way that a störunempfindliche and safe determination of impermissible oscillations of the winding spindles is possible.

This object is achieved in that the measuring device has a stationary distance sensor and that on the roller carrier a distance contour is formed, which cooperates with the distance sensor.

Advantageous developments of the invention are defined by the features and feature combinations of the respective subclaims.

The invention is characterized in that the measurement of the oscillations is displaced in a region of the winding machine in which no rotational transmission of the measuring signals is required. In this case, the invention makes use of the findings that the vibrations carried out on a winding spindle make themselves felt directly on the roller carrier via the bearing of the pressure roller. Depending on the amplitude and frequency of the oscillation on the winding spindle creates a vibration excitation of the roller carrier. Such carrier vibrations cause the position of the roller carrier in the machine frame to change in short time intervals. This vibration-like position changes can be advantageously measured by a contactless held in the machine frame distance sensor. The vibration state of the winding spindle can then be derived directly from the measured carrier vibration. The distance contour on the roller carrier is adapted to a movement path of the roller carrier relative to the machine frame. So it is common that the roller carrier can be performed as a carriage linear or as a rocker on a circular path.

In the event that the roller carrier is formed by a rocker, it is provided according to an advantageous development that the spacing contour is formed on a sensor plate which is attached to the rocker in the vicinity of a pivot axis. Thus, although a relatively small swing radius of the rocker is monitored, but with the advantage of low contour deviations on the distance contour of the sensor plate. So it is possible to use a flat distance contour on the sensor plate.

The distance sensor is preferably aligned at a short distance orthogonal to the distance contour. In this case, the distance between the distance sensor and the distance contour is selected such that no contact occurs even with the largest amplitudes of the carrier oscillation.

The measuring device is connected according to an advantageous embodiment of the invention with a control device in which an evaluation unit analyzes the measurement signals and converts. In this case, comparisons can advantageously be made with limit values for impermissible oscillation forms, so that a shutdown of the winding machine can be initiated directly if the limit value is exceeded.

The development of the invention, in which the control device is connected to a turret drive of the winding turret, offers the additional advantage that the measuring signals can also be used to control the Spulrevolverbewegung, for example, to increase the distance between the winding spindle and the pressure roller due to the coil growth.

As distance sensors non-contact induction sensors are preferably used, which cooperates with the spacing contour of a metallic material. Thus, directly current, voltage and / or frequency signals can be generated, which are directly convertible to corresponding control commands within the evaluation unit or the control device.

The inventive method for controlling and monitoring a winding machine is characterized in that during winding of the coils a change in position of the pressure roller due to a vibration of the winding spindle and due to a coil increase the wound coils is measured with a sensor and that the measuring signals of the sensor for controlling the turret drive and the spindle drives are used. Thus, several functions of the winding machines can be linked directly via a sensor monitoring. The direct relationship between the oscillations of the winding spindle and those on the roller carrier caused carrier vibrations thus allows monitoring of the winding spindle vibrations without direct attack on the winding spindles. Impermissible vibration phenomena, which were previously transferred into impermissible vibration phenomena of the winding turret, thus permit direct intervention in the operation of the winding machine. This is superimposed on a drive control of Spulrevolvers instead, by which a continuous winding of the coils is possible with unchanged position of the pressure roller.

The change in position of the roller carrier is preferably detected contactlessly by an idiometric sensor which generates proportional current, voltage and / or frequency signals per distance value. Thus, any distance value exact control commands can be assigned, so that operating conditions of the roller carrier can be detected with a bobbin change with larger changes in position.

The inventive method for controlling and monitoring a winding machine and the winding machine according to the invention will be explained in more detail with reference to some embodiments with reference to the accompanying figures.

They show:

1 schematically a front view of an embodiment of the winding machine according to the invention

2 schematically a side view of the embodiment of the winding machine according to the invention 1

In 1 and 2 an embodiment of the winding machine according to the invention is shown schematically in a front view and a side view. The winding machine has a rotatably mounted winding turret 1 on that in a pivot 9 a machine frame 2 is held. The machine frame 2 is preferably formed as a turret housing. The winding turret 1 is with a turret drive 10 coupled, by which the winding turret 1 for rotation in the direction of the arrow can be driven.

The winding turret 1 carries two by an angle of 180 ° staggered winding spindles 3.1 and 3.2 , The winding spindles 3.1 and 3.2 are cantilevered on the spool turret 1 held and each coupled to a spindle drive, not shown here. The winding spindles 3.1 and 3.2 by turning the winding turret 1 alternately led into a winding area and a change area to several threads 15 continuously to one coil each 5 wind. In the illustrated position of the winding machine is the winding spindle 3.1 in the winding area and the winding spindle 3.2 in a change area. So carries the winding spindle 3.1 several winding tubes 4 and a coil wound thereon 5 to which the threads 15 be wrapped. The winding spindle held in the change region 3.2 is already released from the finished wound coils and carries new winding tubes 4 ,

The number of on a winding spindle 3.1 and 3.2 simultaneously wound coils is dependent on the melt spinning process. For example, 6, 8, 10, 12 or even 16 threads can be wound simultaneously on one of the winding spindles 3.1 and 3.2 wrap.

The winding spindle acts in the winding area 3.1 with a pressure roller 6 and a traversing device 7 together. The traversing device 7 and the pressure roller 6 are on a traversing vehicle 8th arranged, which cantilevered with the machine frame 2 connected is. In this embodiment, the traversing carrier 8th firmly with the machine frame 2 coupled, wherein the pressure roller 6 via a movable roller carrier 20 on the traversing beam 8th is held. The whale bearer 20 is as a swingarm 21 formed with one end about a pivot axis 22 on the machine frame 2 or the traversing carrier 8th is held. At the free end of the swingarm 21 is the pressure roller 6 rotatably mounted with their ends. The swingarm 21 this can be forked or formed by two partial oscillations.

In principle, however, it is also possible to carry out the roller carrier as a lifting slide, which is linearly displaceable on the machine frame 2 is held to a spooling increase of the wound coils 5 with fixed position of the spool spindles 3.1 to enable.

At the in 1 illustrated embodiment, the evasive movement to increase the axial distance between the winding spindle 3.1 and the pressure roller 6 by the rotational movement of the winding turret 1 executed, so that the winding spindle 3.1 in the Aufspulbereich occupies several positions.

For positioning the winding spindle 3.1 and the winding spindle 3.2 by the rotational movement of the winding turret 1 becomes the turret drive 10 via a control device 14 driven. The control device 14 is also with the spindle drives 16.1 and 16.2 the winding spindles 3.1 and 3.2 and the traversing device 7 connected. The traversing device 7 has per each thread on a traversing unit, in which traversing means are provided for reciprocating the thread. Such traversing means can be formed for example by rotating blades or rotating Kehrgewindewalzen.

For control and monitoring, the winding machine has a measuring device 11 on, which in this embodiment by a distance sensor 11.1 is formed. The distance sensor 11.1 is stationary on the machine frame 2 or the traversing carrier 8th held and immediately the whale carrier 20 the pressure roller 6 assigned. The distance sensor 11.1 is a bearing end of the swingarm 21 near the pivot axis 22 arranged. Opposite of the distance sensor 11.1 is at the swingarm 21 a sensor plate 23 with a distance contour 13 attached to the distance sensor 11.1 interacts with them and sets up a common measuring level. The distance contour 13 is relative to the sensor head of the distance sensor 11.1 chosen so that for each height position of the pressure roller 6 and thus to every angular position of the rocker 21 a certain distance between the sensor plate 23 and the distance sensor 11.1 established. The distance sensor 11.1 is designed as an induction sensor with an analog output, wherein the sensor plate 23 is formed of a metallic material. The analogue output on the induction sensor picks up the current or voltage signals, each of which corresponds to a specific distance value.

The distance sensor 11.1 is via a signal line with an evaluation unit 19 coupled, in which the measuring signals of the distance sensor 11.1 analyzed and converted. In addition to a pure measured value evaluation for determining the respective altitude of the pressure roller, a time course of the measuring signals is detected and analyzed for vibration detection. In this case, both maximum vibration amplitudes and vibration frequencies for analysis and evaluation in the evaluation unit 19 be used. It is likewise possible for the measurement signals to be compared directly with stored limit values for oscillation amplitudes and oscillation frequencies. Upon detection of improper vibration is within the control device 14 a control command for switching off the respective spindle drive 16.1 or 16.2 generated, so that the winding process of the threads on the relevant winding spindle 3.1 or 3.2 can be interrupted. This is the evaluation unit 19 with the control device 14 coupled.

The absolute size of the distance value between the distance sensors 11.1 the distance contour 13 determines an altitude of the pressure roller 6 caused by the increase of the wound coils 5 with stationary winding spindle 3.1 or 3.2 is determined. From this, an angular position of the winding turret can be determined. In that regard, the distance measurements for the identification of impermissible vibrations in dependence on an angular position on the winding machine can be performed. In this case too, the monitoring of the winding machine can be carried out independently of the respective operating state of the winding turret. So can be measured from the vibrations of the roller carrier at standstill or during a rotary movement of the winding turret.

The absolute distance values or the angular positions of the winding turret 1 be within the controller 14 used the turret drive 10 of the winding turret 1 to execute the evasive movement of the winding spindle 3.1 or 3.2 during the winding of the threads 5 to control. For this purpose, the control device 14 with the turret drive 10 connected.

That in the 1 and 2 illustrated embodiment is in the embodiment only exemplary. In principle, it is also possible to form a vertically aligned spacing contour on the roller carrier in the case of a carriage-shaped roller carrier, to which the distance sensor would be aligned orthogonally. This could be done vibration monitoring in any position of the roller carrier. The set between the distance contour and the distance sensor distance would be advantageously set by the distance contour to a constant value.

LIST OF REFERENCE NUMBERS

1

spindle turret

2

machine frame

3.1, 3.2

winding spindle

4

winding tube

5

Kitchen sink

6

pressure roller

7

Traversing device

8th

Traversing carrier

9

pivot bearing

10

revolver drive

11

measuring device

11.1, 11.2

distance sensor

12

axis of rotation

13

distance contour

14

control device

15

thread

16.1, 16.2

spindle drive

19

evaluation unit

20

roll carriers

21

wing

22

swivel axis

23

sensor plate

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 1996/033939 [0002]
• DE 10156454 A1 [0005]
• DE 10046603 [0007]

Claims (10)

Winding machine for winding threads into bobbins with two drivable winding spindles ( 3.1 . 3.2 ) for receiving and winding the coils ( 5 ), with one in a machine frame ( 2 ) rotatable stored Spulrevolver ( 1 ), which the winding spindles ( 3.1 . 3.2 ) protruding and which the winding spindle ( 3.1 . 3.2 ) alternately leads by rotation into a winding area and into a change area, with one of the winding spindles ( 3.1 . 3.2 ) in the winding area associated pressure roller ( 6 ) mounted on a mobile roll carrier ( 20 ), and with a measuring device ( 11 ) for detecting vibrations of at least one of the winding spindle ( 3.1 . 3.2 ), characterized in that the measuring device ( 11 ) a fixed distance sensor ( 11.1 ) and that on the roll carrier ( 20 ) a distance contour ( 13 ) formed with the distance sensor ( 11.1 ) cooperates. Winding machine according to claim 1, characterized in that the distance contour ( 13 ) on a sensor plate ( 23 ) is formed in the vicinity of a pivot axis ( 22 ) as a rocker ( 21 ) trained roller carrier ( 20 ) on the rocker ( 21 ) is attached. Winding machine according to claim 1 or 2, characterized in that the distance sensor ( 11.1 ) with a short distance orthogonal to the distance contour ( 13 ) on the machine frame ( 2 ) is aligned. Winding machine according to one of claims 1 to 3, characterized in that the measuring device ( 11 ) with a control device ( 14 ) and that the control device ( 14 ) an evaluation unit ( 19 ) for processing and conversion of measurement signals. Winding machine according to one of the preceding claims, characterized in that the control device ( 14 ) with the winding spindles ( 3.1 . 3.2 ) associated spindle drives ( 16.1 . 16.2 ) and that the spindle drives ( 16.1 . 16.2 ) as a function of the measuring signals of the distance sensor ( 11.1 ) are controllable. Winding machine according to one of claims 1 to 5, characterized in that the control device ( 14 ) with a turret drive ( 10 ) and that the turret drive ( 10 ) as a function of the measuring signals of the distance sensor ( 11.1 ) is controllable. Winding machine according to one of claims 1 to 6, characterized in that the distance sensor ( 11.1 ) is designed as a non-contact induction sensor, which with the distance contour ( 13 ) cooperates of a metallic material. Winding machine according to claim 7, characterized in that the induction sensor has an analog output, by which voltage, current and / or frequency signals are removable. Method for controlling and monitoring a winding machine with two winding spindles cantilevered on a winding turret, to which a plurality of threads are alternately wound into bobbins, wherein one of the winding spindles cooperates during winding of the threads into bobbins with a pressure roller, which is held on a movable roller carrier , characterized in that during the winding of the coils, a change in position of the pressure roller due to a vibration of the winding spindle and due to a coil increase of the wound coils is measured with a sensor and that the measuring signals of the sensor are used to control the turret drive and the spindle drives. A method according to claim 8, characterized in that the change in position of the pressure roller is detected by a contactless distance measurement by an induction sensor which generates proportional current, voltage and / or frequency signal per distance value.

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