EP1089933B1 - Yarn changing method - Google Patents

Abstract

The invention relates to a yarn-guide of a winding frame (1), which has the form of a pointer, hereafter referenced to as a pointer, and which is reduced in weight and shape towards its free end in order to enable a change of yarn (F) within a traverse yarn winding (H) at a high speed. In a preferred embodiment, a polynomial of at least one degree is used. In addition, the yarn is guided on a guide plate (6). The motor (8) is controlled by a control unit (12) so that the pointer (7) can be used for guiding the yarn (F) within the traverse yarn winding (H). Also, when the pointer stops in a position (C) within the traverse yarn winding (H) an end bead is formed on a ready-made spool and, when the pointer stops in a position (A or B) outside the limits of the traverse yarn winding (H), the yarn is grasped in position (A ) by a new core when it is drawn in (8) during changing of the spool, whereas in position (B) the yarn is wound on said core to form a yarn reserve winding before it is driven back once again within the traverse (H) by the pointer. The control unit and the motor co-operate to reverse the pointer at a selected reverse point. For that purpose, a reverse means operates in a contactless manner, e.g. electromagnetically.

Description

The present invention relates to a traversing with a thread guide which a specifiable stroke must be moved, especially if the Thread guide on a swivel arm or in the form of a swivel stored arm is provided.

State of the art:

The basic principle is very old.

The arm, which can be called a "pointer", was also used on one End part rotatably or pivotably and driven arranged and so at the other end trained to control the thread in a controlled manner. Such an arm is out of the Swiss Patent No. 153 167 and known from DE-C-11 31 575. In CH 153 167 is the arm for guiding a thread at the free end with one thread-guiding fork slot and pivoted at the other end. It is driven by a mechanical overdrive from the drive of the coil out. The thread is guided over a guide rod, the geometry of the Arrangement of this fixed guide rod, against which during the winding trip increasing diameter of the pack, should lead to a shorter stroke. The Device is unsuitable for use in a modern winder.

The fork slot has a predetermined length such that a thread inside the predetermined length of the fork slot, due to the location of a guide and the growing coil, is always deeper in the fork slot, creating a The shortening of the changing thread is shortened due to the shortening the distance between the pivot axis of the lever and the point at which the Thread is guided in the fork slot to thereby obtain conical ends of the bobbin. By means of a cam and a lever with a scanning roller, which by means of a Connecting rod drives the thread guide lever, the arm becomes at the ends of the bobbin accelerated or decelerated.

EP-B-453 622 proposes a device with a thread guide and one Thread guide carrier in front, the carrier being guided in a groove. The device also includes a drive motor and a programmable controller, the Motor while the thread guide is near a turning point with higher than the nominal current and while the thread guide is in the rest of the range is operated with a current below the nominal current. Basic programs for different winding sections are in the control saved. The paths and speeds are calculated in the control and accelerations for motor movement due to the application upcoming winding laws. Parameters that can be saved include the Basic stroke and the basic stroke variations, for the production of soft coil edges.

According to the embodiment shown as an example, a stepper motor works as Drive motor, between the center of the stroke and a reversal point, against one Torsion spring. In the vicinity of a reversal point, the spring constant is increased Power supply to the stepper motor increases and the frequency of its drive pulses reduced. It should therefore come to a standstill at the reversal point. A corresponding Monitoring is not provided. A sensor is provided in the middle of the stroke enables the detection of any errors at this point in the traverse stroke. On The traversing stroke is always controlled from this point using a pulse sequence. The exact determination of the reversal points cannot be found in the scriptures is also not possible at all, because they arise from the opposing forces of the Motor and the spring will result.

EP-B-556 212 (WO 92 086 64) shows a traversing with a thread guide in FIG. 4 at the free end of a swivel arm. Dealt with according to the main claim this document with a procedure according to which the pack structure by controlling the Relationship between the rotation of the winding and the speed of the Shifting of the thread happens. This is done by rotating the winding controlling return arrangement can be accomplished. In the description controlling the speed of thread displacement during a single one Lift movement emphasized. Nothing will be said about determining the reversal points said this movement.

EP-0 838 422A1 describes a thread guide shaped like a finger or pointer known, which is arranged drivable at one end on a motor and on the other end is equipped with a slot for guiding a thread. The motor is based on a preprogrammed control for pivoting the pointer and thus controlled for the traversing of the thread and the pivoting movement of the The pointer is continuously monitored using a photoelectric sensor, whereby in the event of deviations from a specified movement program Swivel movement is corrected. The sensor speaks optically scannable Markings.

To assist in decelerating and accelerating the pointer at the stroke ends, are energy storage devices on a pivotable and drivable carrier, For example, springs are provided, which when decelerating the pointer with energy charged and discharged when the pointer accelerates. The carrier is provided pivotably by means of a drive and the drive is by means of the Control controlled in such a way that the position of the energy store can be changed that on the one hand the energy storage device adapts to the hub to be used, for example for the construction of the coil.

The traverse according to EP-A-838 422 is designed for laying a thread that is withdrawn from a supply spool. A precision winding is to be formed from this become. The photoelectric sensor monitors the position of the pointer its monitoring always for a starting position of the thread guide, preferably to the zero point of its pivoting movement. This takes place in that the Thread guide first brought to one and then to the other reversal point the sensor counts the number of markings corresponding to this stroke and calculated the zero point from it. EP-A-838 422 does not explain how the Reversal points are set. The stroke of the thread guide should be by the stroke of the Pivotal movement of the above-mentioned carrier can be defined and the latter stroke to be monitored by a second sensor. The coordination of movements the carrier and the pointer have been mentioned but not explained. According to the In any case, the description of the adjustability of the energy storage serves to provide a To allow "simple change" of the stroke of the thread guide. To do this Arrangement of the energy storage on the oscillating drivable carrier Changing the stroke of the thread guide simply by changing the stroke of the Carrier and without mechanical adjustment of the position of the energy storage enable.

It can be assumed that the positions of the reversal points coincide with the positions of the Energy storage related. The positions of the energy storage can be over the control can be influenced.

DE-A-196 23 771 shows a traversing with at least one guide rail (Fig. 1/2) and possibly two guide rails (Fig. 3/4) for the thread guide. In a Variant (Fig. 1/2) can the guide rail as the stator of a linear servo motor are formed, for which purpose it can be provided with magnets. In the other A swivel arm is provided to the traversing movement on the variant Thread guide, which is why an "articulated connection" between the Swivel arm and the thread guide is required. About the determination of the There are no turning points in DE-A-196 23 771. Like the linear servo motor is not to be determined from this document.

JP 7-165368 shows an oscillation with a "linear motor". Building this Motors or the way he works with the thread guide is from the Description or representation not visible.

JP 7-137935 describes a linear motor, of which a slide (with a Thread guide) moves back and forth along a rod, the magnetic field is passed through the pole. Springs are provided at the reversal points.

JP 7-137934 describes a similar arrangement, the spring being used by sensors be replaced, which work with a timing control to reverse trigger.

The structure of the linear motor is not clearly evident from the latter documents.

The invention:

The object of the invention is to overcome disadvantages of the prior art remove.

The solution is that the drive for the arm (pointer) or its holder with is provided with a programmable controller and the reversal points for the Stroke movement can be set in this control. The setting could by entering the reversal points directly. Preferably However, winding parameters are entered, from which the control system can change the reversal points can determine based on their programming. The positions of the reversal points can be changed during an updraft cycle. The arrangement is made that the controlled drive reverses at a chosen reversal point can guarantee. Compliance with the required reversal accuracy can be achieved by suitable sensors are monitored and reported to the control system. The Approaching and possibly moving away from a reversal point in particular, to be monitored in order to detect errors at these points. The Reversal points of the arm correspond to the reversal points of the bracket. The Control can therefore be designed such that the oscillating movement of the Bracket is controlled directly. This gives the stroke movement one on the Arm provided thread guide.

The arm is preferably designed in terms of shape and weight such that the Arm driving motor according to one for a given coil structure predetermined control program can be accelerated and delayed. In a first preferred embodiment, the arm is at least according to a polynomial first degree and preferably second degree, so that one is linear increasing moment of inertia from the axis of rotation to the tip of the pointer receives.

In a further preferred embodiment, the cross section of the arm, in Direction of movement, a larger dimension than perpendicular to it, as well the cross section is preferred over at least a predetermined length range of the Poor hollow and also preferred, this hollow area is filled with a filler, the specific gravity of which is smaller than that of the walls of the hollow area.

It is also advantageous if the arm consists of more than one part by advantageously an inserted or attached at the thread-guiding end of the arm Thread guide element is provided.

It is also advantageous to make the arm at least partially from a carbon fiber composite material to manufacture. In addition, the arm is preferably in a supporting part and divided a thread-guiding part provided thereon. The load-bearing part can be in Sandwich construction or as a hollow profile are manufactured, with an (outer) Shell of the supporting part composed of separately formed elements can be.

Due to the favorable design of the arm and the drive, there is a possible one Use this arm in that the arm has the thread within the stroke a variable stroke length and a predetermined stroke outside the stroke Function or can perform several predefined functions, e.g. the function of Retraction and reel change by positioning the arm outside the stroke can be such that the arm is in one place for catching the thread in a catch slot or a catch knife on the sleeve or spool, and for Formation of a thread reserve on a sleeve end is stopped. Furthermore, can the arm to form an end bead on the finished spool also within the stroke to be stopped.

The oscillating rotary movement of the holder preferably comprises one predetermined angle of rotation e.g. between 45 ° and 90 °, for example 60 °. The length of the arm can be selected depending on the desired stroke width.

Fig. 1

eine Spulmaschine mit einem erfindungsgemässen Arm und einer erfindungsgemässen Anwendung des Armes, je schematisch dargestellt,

Fig. 2

die Spulmaschine von Fig. 1 in Blickrichtung I von Fig. 1 dargestellt,

Fig. 3

die Ansicht von Fig. 2 jedoch zusätzlich mit einem von einer Steuerung aufgeprägten Geschwindigkeitsverlauf des Armes während des Hubes,

Fig. 4

eine weitere Variante der Ansicht von Fig. 2, ebenfalls zusätzlich mit von einer Steuerung aufgeprägten dem Geschwindigkeitsverlauf des Armes während des Hubes,

Fig. 5

ein Diagramm zur Erklärung der Programmierung der Motorsteuerung in einer Variante nach Fig. 1, 2, 3 oder 4,

Fig. 6

schematisch einen Plan eines Zeigers gemäss der Erfindung,

Fig. 7

einen Querschnitt einer ersten Variante eines Zeigers nach Fig. 6,

Fig. 8

einen Querschnitt einer zweiten Variante eines Zeigers nach Fig. 6,

Fig. 9

ein Diagramm zur Erklärung gewisser Spulparameter, die in die Steuerung eingegeben werden können,

Fig. 10

ein Diagramm zur Erklärung eines Beispiels der Ausnutzung der Fähigkeiten der neuen Changierung, und

Fig. 11

in den Skizzen 11A, 11B und 11C drei verschiedene Varianten des Fadenführers, und

Fig. 12

in den Skizzen 12A, 12B, 12C und 12D vier verschiedene Varianten der Verbindung zwischen dem Arm und dem Antriebsmotor.

The invention is explained in more detail below on the basis of exemplary embodiments illustrated in the drawings: It shows:

Fig. 1

a winder with an arm according to the invention and an application of the arm according to the invention, each shown schematically,

Fig. 2

1 in the viewing direction I of FIG. 1,

Fig. 3

2, however, additionally with a speed profile of the arm impressed by a control during the stroke,

Fig. 4

2 shows another variant of the view of FIG. 2, also with the speed profile of the arm impressed by a control during the stroke,

Fig. 5

1 shows a diagram for explaining the programming of the motor control in a variant according to FIG. 1, 2, 3 or 4,

Fig. 6

schematically a plan of a pointer according to the invention,

Fig. 7

6 shows a cross section of a first variant of a pointer according to FIG. 6,

Fig. 8

6 shows a cross section of a second variant of a pointer according to FIG. 6,

Fig. 9

a diagram to explain certain winding parameters that can be entered into the control,

Fig. 10

a diagram for explaining an example of the use of the capabilities of the new traversing, and

Fig. 11

in the sketches 11A, 11B and 11C three different variants of the thread guide, and

Fig. 12

in the sketches 12A, 12B, 12C and 12D four different variants of the connection between the arm and the drive motor.

Fig. 1 shows schematically a cross section through a winding machine 1, in which a thread F is built into a bobbin 3 by means of a traversing device 2. The Coil 3 builds up on a sleeve 4 which is supported by a coil mandrel 14 is included.

The coil 3 is driven either by driving the coil mandrel 14 (not shown) or by means of a friction roller or contact roller 5. The friction or Contact roller (with driven mandrel) also has the function of Thread from an iridescent thread guide 7, here called pointer 7 or arm 7 take. The pointer 7 is between or in front of a guide ruler 6 and the distribution roller or tachometer roller 5, the guide ruler 6, for example in the manner of following figures 2 or 3 and 4 can be designed.

The coil 3 with the sleeve 4 is shown in the working position, with an additional one Start of a coil build-up in the working position empty sleeve 4.1 on the friction or speedometer roller 5 is shown attached, while with 4.2 empty sleeves in the waiting position are shown. These two waiting positions are the starting positions for one with a dash-dotted line shown rotary movement of a so-called Revolver drive, by means of which the empty sleeves on the distributor roller or the full one Coil 3.1 are moved away from the friction roller into a removal position.

The pointer 7 is with the larger and heavier end in terms of shape on a motor shaft 9 of a motor 8, for example according to FIGS. 12A-12D, in a rotationally fixed manner attached, the motor 8 by a controller 12 corresponding to one Lifting program for building a coil is controlled. Entering one Programs in the controller are done via an input device 13.

A movement monitoring device 16 is provided to control the movement of the pointer 7 provided, consisting of a signal generator permanently connected to the motor shaft 9 10 and a signal receiver 11 arranged separately therefrom, which its signals received from the controller 12.

Corresponding to the design of the guide ruler 6, as shown in FIGS. 2 and 4 is shown, the thread F depending on the angle of attack α or α1 are provided, these angles of attack must be provided in such a way that the thread F is never lifted from the guideline 6, unless the guideline have, as shown in Figures 2 to 4, rulers 6.1 and 6.2, which the Guide the thread in such a way that the thread never comes out of a guide slot 15 or 15.1 of the Pointer 7 is raised.

The design of the ruler 6, including the design of the counter rulers 6.1 and 6.2, is different after arranging the guideline, opposite the pointer 7 and the friction roller or Speedometer roller 5 feasible, i.e. the design of the guideline 6 is not on the Representations in Figures 2-4 restricted.

The thread run corresponding to the angle of attack α.1 is with F.1 and the thread run F is marked in accordance with the angle of attack α. The choice or the Necessity of the appropriate location depends on the aforementioned design of the Guidelines together, or vice versa.

Fig. 2 shows the winding machine 1 in viewing direction I, for the sake of simplicity Input device 13 and the controller 12 are not shown. 2 is intended firstly are shown that the pointer 7 not only back and forth within the stroke H. can be moved, but that the thread F on the one hand for changing the bobbin can be stopped by means of the pointer 7 in the position C in order to complete on the Coil to form a so-called end bead.

In addition, the pointer 7 can be used for thread retraction at the start of a winding process or stopped when changing bobbins in positions A and B outside of stroke H. on the one hand in position A to hold the thread in a position, in which this of a catch knife or sleeve notch of a next one Sleeve can be caught while position B serves to thread the thread on the hold the new core in a position in which the thread has a reserve winding can form on the sleeve end. The thread F is then moved by the pointer 7 led into the stroke H and further switched back and forth within the stroke.

It can be seen from this that the pointer of this variant is not only at the ends of the Hubes can be delayed or accelerated without external aids, but that the pointer can be brought very quickly into positions in which it is for stands still for a short moment and then back in at high speed another functional area to be shifted or accelerated.

3 additionally shows a speed profile of the pointer 7. This The speed curve shown varies depending on the type of spool construction, which is why the speed curve shown does not limit the possible Representation of speed of the pointer 7.

FIG. 4 shows a variant of the guide ruler 6, on the one hand by the guide ruler 6.3 2 and 3, an elongated guideway 17.1 has and on the other hand the thread F in an extended guide slot 15.1 of Thread guide 7 is guided. There is a possibility, depending on Coil structure and traversing speed curve and arrangement of the distribution roller or speedometer roller 5 relative to the pointer 7 and relative to the ruler 6 others To provide guideline forms.

There is also the option for the pointer to optimize the design of the Coil to select a variable angle of rotation as a reversal point according to the control.

Fig. 5 shows diagrammatically the axis of rotation D of the pointer 7 and the reversal points U1, U2 a certain traversing movement of the thread guide 15 with a stroke length B. Die The longitudinal axis ZL of the pointer 7 must be pivoted about the axis D by an angle γ to generate the traversing motion. This movement can occur in the Control 12 can be programmed, the reversal point e.g. towards one Reference line R can be defined. The sensor 10 (Fig.1) or the evaluation in the Controller 12 can be designed such that the motor 8 is turned on by the controller a given reversal point (U1 or U2) reverses its rotation. The actual position the pointer 7 is always known via the movement monitoring device 16 and can be compared by the controller 12 with the predetermined reversal points to enable reversal at the desired location.

The specified reversal points U1, U2 can (within specified limits) can be changed via the input device 13, as will be explained in more detail below. This is indicated schematically with the dashed lines in Fig. 5. At most it has to be Arm rotation speed, e.g. if the linear velocity of the thread guide must remain constant. For example, also a coil build cycle can be entered, whereby the stroke can be changed during the build-up of the spool can. The build cycle includes e.g. also the definition of an associated Thread catching position, as already described. The entry can e.g. based on predetermined winding parameters take place. The operator is, for example, from the controller 12 prompted to enter the required parameters before a winding cycle can be started.

Figures 1 to 5 therefore represent a first variant, according to which the reversal predetermined reversal points U1, U2 (but possibly also at other points) is accomplished by the engine without additional aids. Fig. 6 shows one Variant according to which aids are provided, but the reversal points nevertheless be determined by the programmed control. 5 forms the arrangement therefore a starting point for the variant of FIG. 6, with certain Differences will become apparent as the description proceeds.

6 now schematically shows a pointer 100 for use in the embodiments according to the other figures. The pointer 100 comprises an attachment section 102, a middle part 104 and a thread guide 106 at the free end. Starting from the The axis of rotation D has a length L up to the free end of the thread guide 106 out. From Fig. 5 it can be seen that at a predetermined angle of rotation γ this Length is decisive for the stroke width B. If e.g. the length of the pointer in FIG. 5 would be shortened, the reversal points would e.g. are at U3 or U4 and one result in a correspondingly shorter stroke width (not specifically indicated). In principle, could a pointer of a particular traversing unit by a shorter (or longer) Pointers are replaced to adjust the stroke width to the requirements. Usually, however, it will be preferred to set the pointer length to a specific one To maintain the traversing unit unchanged and the flexibility of programming for Take advantage of stroke changes. Different traversing units (e.g. for Spoolers with different numbers of threads) have different pointer lengths. in the In principle, it is also possible to vary the maximum angle of rotation Program traversing units individually (and the geometry of the elements adjust accordingly). However, a predetermined programming is preferred (Geometry) - or at least only a few variants - provided.

The length L is preferably between 10 to 50 cm and the angle of rotation y between 40 ° and 100 °, preferably 45 ° -90 °.

Fig. 7 shows a possible cross section of the pointer 100 at any point in the Middle part 104. In this variant, the pointer is a hollow body with a width W (at the mentioned place) and a "depth" t. The depth t is preferably above that Length of the pointer 100 constant. It is clear from FIG. 10 that the width W is considerable is greater than the depth t and this also applies over the entire length of the pointer 100 Hollow body should be made of a stiff but light material preferably made of fiber-reinforced plastic. The fibers preferably have one high modulus of elasticity (e.g. carbon fibers, boron fibers or aramid fibers).

In the attachment section 102 the pointer has a reinforcement 108 (Fig. 6) e.g. out Metal on. In this example, the reinforcement 108 has a U-shaped attachment (not specifically indicated), which extends as an insert into the hollow body 104 and therein is connected to the hollow body (e.g. using adhesive). The metal part is with a Provide receptacle 110 for the shaft 44 (Fig. 6) of the drive motor.

The U-shape of the header is not essential, the connection between the lot 102 and the hollow body 104 should, however, for the safe transmission of the driving forces (Torques) on the hollow body and ensure reliable over the service life of the hollow body 104.

The thread guide 106 is preferably also formed as a separate part and with the Connected hollow body, with a slotted part of the thread guide remains free. This part can e.g. be made of ceramics.

The hollow profile 104 (Fig. 7) in the form of a rectangular profile can e.g. as Winding bodies are formed. A wrapping process (for a larger body) is shown schematically in EP-A-894876 - it can be adapted to form profile 104 become. The hollow profile 104 could, however, as an alternative from e.g. two shell parts are formed, which are connected to one another (e.g. by means of adhesive) to form a to form composite hollow body. Each shell part could e.g. B. as a U-profile shallow depth are formed, the side walls of these shell parts be connected to each other to form the hollow body.

6 clearly shows that the cross section of the pointer 100 changes over the length L. preferably as a function of the distance from the axis of rotation D. measured. Figure 9 shows a pointer with a linear relationship between the Pointer cross section and this distance, being a quadratic relationship actually is preferred. Since the depth t is preferably constant, the change in cross-section manifests itself in a change in width W.

8 shows a modified cross section, with the dimensions W and t being opposite 7 are unchanged. In this variant, the pointer 100 comprises a first plate 112, a second plate 114 and an intervening filler layer 116, which with the Plates e.g. is connected by adhesive. The end parts 102 and 106 can parts already described be the same.

The previous description relates to reversal points for the arm or the Pointer because these places are of great importance for the actual function. The Control does not directly relate to the momentary position of the arm, however to that of the motor shaft, which is part of a bracket for the arm (pointer) serves. The control is therefore based on reversal points for this bracket (for the shaft) programmed, which are then in the reversal points for express the arm.

The current angular position of the shaft (bracket) can be from a rotary encoder are displayed. This encoder can be an incremental encoder or a Be an absolute encoder. In the case of an incremental encoder, the system Starting to be brought to a reference point, of which the incremental encoder Changes in position afterwards "counts". At best, occasionally needs to reference this be retracted to check the system status and if necessary to correct. With such a device, a thread removal accuracy of e.g. +/- 0.25 mm can be achieved. With an absolute encoder, this "calibration" to be dispensed with.

Different (e.g. non-contact) sensors for referencing the Encoder are used. Examples are optical, pneumatic, electrical and inductive (magnetic) sensors. A signal delivered by the sensor, which the "Presence" of the arm in its vicinity shows, can be directed to the control and there be evaluated to give a reference for the positioning system. In an alternative can be the arm in contact with a mechanical stop brought, the corresponding output signal of the encoder can be evaluated to give a reference for the positioning. This Step is to be carried out as a special referencing step, with the motor on lower torque creates a damage-free contact between the arm and the stop.

The reference sensor or the stop can be outside the maximum Stroke range because the motor is able to move the arm outside of this Moving area e.g. for the referencing step mentioned. The Reference sensor or the stop could be within the stroke range are located. In the latter case, the stop must be out of the path of movement of the arm be removed before the actual traversing movement takes place. In addition, the Stop e.g. at right angles or at least at an angle to the traversing plane between one Ready position outside the traversing level and a working position in the Traversing plane are moved, for example by means of a cylinder-piston unit.

The programming of the control consists of a "fixed" part, the cannot (or should) be influenced by the end user and one by the user requested part, which preferably consists of certain winding parameters. A nominal stroke width preferably belongs to the fixed program part, whereby the effective stroke width (the laying length) for a certain thread stroke from the Control is calculated based on the winding parameters entered by the user. The following winding parameters can be entered, for example:

crossing angle

The crossing angle defines the current winding speed (medium) traversing speed. Fig. 9 shows schematically the change in Crossing angle course during the winding travel, the illustration in FIG. 8 from EP-B-629174.

bandwidth

The bandwidth defines the deviation by which the given crossing angle may vary (Fig. 9) if a step precision winding is desired (see Fig. 8, EP-B-629 174). The deviation from the average crossing angle of the band is e.g. 0 to 3 °.

breaking table

The break table contains the broken parts of the reliable Turn ratios (see e.g. U.S.-B-5,605,295). Selected turn ratios can e.g. B. stored as recipes in a winder of the controller.

stroke breathing

With periodic breathing, a periodic change in the laying length is defined. Also in In this case, recipes can be saved.

stroke course

The course of the stroke defines the laying length over the winding travel. For example, four installation points are assigned one installation length each.
Unit:% (the normal stroke width), range: 80-120%.
In this area, a nominal stroke (= 100%) is entered into the software. The change can then e.g. B. only between 80-120%. If, for example, a nominal stroke = 250 mm is defined, it can be changed between 200-300 mm. The stroke width can then be selected constantly via the spool travel, or a (e.g. diameter-dependent) curve can be entered (similar to the crossing angle curve). Superimposed on this, the stroke width can change via stroke breathing (similar to step-precision winding or wobble over the crossing angle curve).

The course of an operating parameter (e.g. crossing angle or stroke course) could as a function of time or another correlating with the coil structure Parameters can be defined. The horizontal axis in Fig. 9 would have to be corresponding be adjusted. A variable course could in particular be a function of the Number of strokes of the traversing device can be defined, the number of strokes from Start of the winding trip or from a previous base could be defined.

Various "traversing recipes" can be permanently programmed in the control (fixed does not necessarily mean unchangeable, but only by the user at Entering winding parameters cannot be influenced). The user can then do one of these recipes and use the entered winding parameters to form "link" certain coils.

The stroke width should optimally include the sleeve length (pack volume = max.). If, however, for technological reasons (e.g. due to extreme bulging) narrower pack can be wound without the bellies over the sleeve edge stand out, this can be an advantage for transportation. The skills can do that the new traversing can be used, which can be seen from Fig. 10. The "core" K in this figure represents a cylindrical packing that on the sleeve H with the previous changes can be built. The axial length of this Core pack K is considerably shorter than the length of the sleeve H because the expected one Bulging causes an expansion of the core to the permissible limits becomes. By means of a traverse according to this invention, at least one pack can with biconical ends E are formed because of the stroke length during the winding travel can be changed. This allows more thread material to be wound per tube without the bobbin build-up using a special storage algorithm to have to influence. By taking full advantage of the capabilities of the new Traversing, i.e. in the controlled laying of the thread within the individual Traversing strokes, it is at best possible to use a cylindrical packing Z with the to form the maximum permissible axial length.

In a practical winder (see e.g. US-B-5,794,868 or US-B-5,553,686) usually several threads side by side on a single spool each in a package. A traversing unit (with one Pointer) can be provided according to the invention. However, it is not absolutely necessary to provide a separate motor for each pointer, although this is obviously possible is. Instead, a common motor can be provided for all traversing units be, the rotational movements of the motor shaft by a suitable transmission (e.g. by means of a belt) to the respective traversing units. The transmission is preferably carried out so reliably that it is monitored per unit can be dispensed with i.e. it is also just a servo controller for the central drive provided. If the transmission path becomes too long, the Drive "in groups", i.e. it can be for a group (two or more) neighboring units, a common drive can be provided.

11 deals with suitable designs of the thread guide. The preferred Construction includes a positive connection between the thread guide and the arm (pointer). Two possible variants are shown in FIGS. 11A and 11B. The first variant (FIG. 11A) comprises an elongated body 130A with it in the Longitudinally tapering side surfaces 131, 132, which have a relatively wide foot area 133 and a narrow head 134 result. The foot section 133 is from the arm (not shown), so that the head part 134 is free. The head section 134 has a longitudinal slot 135, which opens at the free end of the thread guide. The variant 11B also has a foot section 133 and a head 134 with a longitudinal slot 135. The body 130B, however, has parallel side surfaces 136, which in the Area from the inner end of the slot 135 each have a projection 137. The Head width is therefore equal to foot width in this case, body 130B as well could be provided with tapered side surfaces. The foot section 133 of the Body 130A or 130B is installed or embedded in the arm such that the Projections 137 and / or the tapered side surfaces 131, 132 with the arm form the desired positive connection.

FIG. 11C also shows a thread guide in the form of an elongated body 130C with a foot part 133 (similar to the foot part of the variant according to FIG. 11B), a head 134 and a longitudinal slit 135. However, the legs 138, 139 formed by the slit 135 are in this case not of the same length, which favors the threading of the thread guide when the arm is moved in one of its directions of rotation. The thread guide can be formed from a suitable material, for example Al ₂ O ₃ or SSiC. However, it is also possible to fundamentally form the body 130 from another expensive material and to provide it with a suitable coating. The coating material has to meet two requirements, namely (1) form a surface that causes only little friction between the thread and the thread guide, and (2) have a high wear resistance because the thread during high-speed winding (e.g.> 4000 m / min., preferably> 6000 m / min, for example up to approx. 10,000 m / min.) produces a highly abrasive effect. The coating material, or the material of the body, if a coating is not used, must therefore be hard and tough. Suitable coating processes are, for example, galvanic coating or plasma coating.

The thread guide should be formed with as little mass as possible. Its length is therefore kept as short as possible, with a shortening below a certain limit is prevented by the required function. The body 130 therefore faces preferably a small thickness (cf. dimension "t" in FIGS. 6 and 7), i.e. perpendicular to the plane of the illustration in FIGS. 11A to 11C. The preferred The thickness of the body 130 is therefore in the range from 0.2 to 1.5 mm, preferably approximately 0.6 mm.

To keep the friction between the thread and body 130 to a minimum, For example, the body 130 may have roundings in the area of the slot 135 or only have broken edges.

To securely connect the thread guide to the arm, an additional Lanyards are used, e.g. an adhesive or a screw. The Connection can be made during arm establishment i.e. the Thread guide can be integrated into it when putting together or forming the arm or the thread guide can only be connected to the arm afterwards, i.e. after the arm itself is finished.

The thread guide can be embedded in the carrier arm in such a way that it is supported. This prevents the thin ceramic plate from breaking. The larger adhesive or connecting surface also ensures a good distribution of forces. It is not essential to the invention to form the thread guide separately and attach it to the arm. A thread guide slot could be formed directly in the arm itself. The required Protection against wear could be guaranteed by a suitable coating become.

At the other end of the thread guide arm, a connection to the Drive shaft of the motor can be created. This connection is important because the Ability of the motor to precisely determine the position of the thread guide from the Accuracy of transmission of motor shaft movements on the arm depends. In this case too, there is preferably a positive connection conditions. Fig. 12A shows an end portion 102A (see Fig. 6) which is continuous Bore 140 has to receive the free end of the motor shaft 44. The In this case, the end part of the shaft 44 is ground on one side in order to form a surface 142 form. A side wall 143 of part 102A has a threaded bore (not special indicated) for receiving a fastening screw 144, the inner end the screw firmly against the surface 142 or in a hole (not shown) in the The shaft end protrudes.

Fig. 12B shows a similar variant, with the one-sided grinding from Shaft end is dispensed with. The screw 144 works with a threaded hole (Blind hole) or tongue groove in the shaft end together. 12C shows an end portion 102B in cross section. This part is provided with a tapered hole 145 to a To receive the truncated cone 146 at the free end of the shaft 44. A clamping screw 147 clamps the end portion 142 on the shaft end. 12D shows an end portion 102C with a slot 150 through to the bore 140 to form two elastic deformable leg 148 or 149. A lag screw 151 can be provided to press the legs against each other while doing a non-positive To create connection with the shaft end received in the bore 140. The adhesion may not be sufficient in the long run. So he can can be supplemented by an additional form fit, e.g. by longitudinal ribs on Shaft end (not shown) which engage corresponding grooves in the end part 102.

The end part 102 preferably has a low mass inertia. It can therefore e.g. be formed from a light metal alloy (Al alloy). As in the case of the Thread guide, it can be integrated or when creating the support arm can be subsequently integrated, e.g. using adhesive.

• die verschiedenen konventionellen Wicklungsarten (wilde Wicklung, Präzisionswicklung und Stufenpräzisionswicklung);
• die verschiedenen konventionellen Packungsformen (zylindrisch, konisch, bikonisch..)
• Hubänderungen, wie Hubverkürzung, Hubverlegung und "Hubatmung".

As was mentioned at various points in the description, with a traversing according to the invention, by means of suitable programming, many types of packaging can be realized, which until now could only be achieved by adapting the machine itself to a greater or lesser extent (exchanging the traversing). Examples are:

• the various conventional types of winding (wild winding, precision winding and step precision winding);
• the various conventional packaging forms (cylindrical, conical, biconical ..)
• Stroke changes such as stroke shortening, stroke relocation and "stroke breathing".

The term "lifting breathing" refers to an intermittent or periodic Displacement of one or both reversal points of a traverse stroke. The principle is well known to those skilled in the art and has also often been realized, however usually by means of considerable mechanical complexities - see e.g. US 5,275,843; US 4,555,069, EP 27173 and EP 12 937. The ability of now present change, the stroke characteristic for individual layers or at least Programming individual layers of the pack now enables implementation stroke breathing even in a high-speed winder without one mechanical intervention in the normal thread guide.

Important in connection with the design of the machine itself is its simple structure, which is based on the optimal use of modern materials (low-mass construction) and control principles (digital servo drives). This makes it possible to connect the thread guide directly to the motor, so that the movements of the rotor can be transmitted to the thread guide without translation, whereby the high dynamic requirements of a change for a high-speed winder can still be met. Important in this context is the lack of "additional" frictional forces between the thread guide and a "thread guide". Providing or attaching the thread guide to a carrier (arm) that does not itself require additional guidance (ie has the required rigidity with a low moment of inertia) therefore enables a significant improvement in the dynamic capabilities of the system.
Nevertheless, it is possible that exact adherence to the specified reversal puncture (without the use of an "oversized motor") will lead to difficulties, so that at least for certain applications, for example, an overshoot of the reversal points must be expected. In such cases, the error can be measured because the angular position of the arm or its holder is always known and the motor control can be arranged in such a way that the error is compensated for as far as possible by changing the stroke characteristic. The overshooting with measuring the error with subsequent error compensation is accordingly regarded in the claims as "adhering to the predetermined reversal points".

Claims (19)

1. Traversing device (2) with a rotatable holding means for an arm (7), a drive for the rotation of the holding means around a predetermined rotary axis (D), a programmable control means (12) for the drive and a detecting means (10, 11) whose output signal depends on the angular position of the holding means, characterized in that the reversing points for the rotary motion of the holding means can be variably defined in the control means (12) and that, by means of the defined reversing points and the position information delivered by the detecting means (10, 11), the control means (12) is enabled to control the drive (8) in such a way, that the holding means is being rotated back and forth between the defined reversing points, whereby an arm (7), carried by the holding means, is swivelled back and forth between the corresponding reversing locations (U1, U2) of a traversing range.
2. Aggregate according to claim 1, characterized in that the reversing points can be selected variably within a given range.
3. Aggregate according to claim 1 or 2, characterized in that the arm (7), can be controllably moved outside the traversing range by the motor (8) for performing predetermined functions, e.g. bobbin change, thread catching.
4. Aggregate according to one of the previous claims, characterized in that the arm (7) is formed according to a polynomial that is at least of first order.
5. Aggregate according to one of the previous claims, characterized in that the cross section of the arm (7) is larger in moving direction than perpendicular thereto.
6. Aggregate according to claim 5, characterized in that the cross section is hollow along at least a predetermined longitudinal zone of the arm (7).
7. Aggregate according to claim 6, characterized in that at least one part of the hollow zone of the cross section of the arm (7) is filled with a filling material whose density is less than the one of the walls of the hollow section.
8. Aggregate according to one of the previous claims, characterized in that the arm (7) consists of more than one component.
9. Aggregate according to claim 8, characterized in that the arm (7), at the thread guiding end, is provided with a thread guiding element (15), which is inserted into or attached onto a carrying part, or which itself is formed as a thread guide (7, 15).
10. Aggregate according to claim 9, characterized in that the thread guide element (15) comprises a greater wear resistance than the carrying cross section of the arm (7).
11. Aggregate according to claim 9 or 10, characterized in that the carrying part of the arm (7) is produced as hollow profile or in a sandwich-type structure, preferably with shell shaped components.
12. Aggregate according to one of the previous claims, characterized in that the arm (7) is produced, at least partially, from carbon fibre composite material.
13. Aggregate according to at least one of the previous claims, as traversing device (2) of a winding machine (1) for the traversing of the thread (F) along a stroke (H), characterized in that the arm (7) can guide the thread (F) also outside the stroke (H) for predetermined functions.
14. Aggregate according to claim 13, characterized in that the control means (12) controls the drive (8) in such a way, in that the arm (7), for the formation (of a bobbin) within the stroke (H) is moved according to a given program and that for the draw-in and bobbin change it can be stopped outside of the stroke (H).
15. Aggregate according to claim 14, characterized in that the arm (7) can be stopped outside of the stroke (H) at a point (A) for catching a thread (F) by means of a catching knife or by a catching slot of a new sleeve (4), and a further point (B) on the bobbin tube (4) closer to the package for the formation of a thread reserve.
16. Aggregate according to claim 14 or 15, characterized in that the control means (12) can also stop the arm (7) within the stroke (H) for the formation of the end bulge on the finished package.
17. Aggregate according to one of the claims 8 to 16, characterized in that for the arm (7), for an optimised formation of the package, a variable rotary angle can be selected as reversing point according to the control means (12).
18. Aggregate according to one of the previous claims, characterized in that guiding template (6) is provided for guiding the traversing thread (F) and that the guiding template (6) comprises a predefined shape each for the guiding of the thread (F) within and outside the stroke (H).
19. Aggregate according to one of the previous claims, characterized in that the control means (12) comprises a respective predetermined control program each for guiding the thread (F) within and outside the stroke (H) that is for the formation of the bobbin (4.1), the draw-in and the bobbin change.

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