EP0914287B1 - Method for winding up an advancing thread - Google Patents

Description

The invention relates to a method for winding a continuously starting thread into a bobbin, in which the bobbin is formed on a driven bobbin spindle, which is cantilevered on a movable carrier, in which a pressure roller mounted on a second movable carrier with a by the position of the pressure roller abutment force which can be changed relative to the bobbin is applied to the circumference of the bobbin and in which a change in the center distance between the bobbin and the pressure roller required by the increase in diameter of the bobbin takes place by an evasive movement of the pressure roller and / or by an evasive movement of the bobbin spindle depending on the increasing bobbin diameter, whereby the evasive movement of the winding spindle during the winding travel is controlled according to a predetermined speed function (F _v ), which assigns a specific speed (v) to the evasive movement as well as e A winding machine for performing the method.

When winding a continuously running thread into a bobbin, at which is pressed against the circumference of the bobbin with a contact force, is the increase in the coil diameter by an evasive movement of the Coil or by an evasive movement of the pressure roller. in this connection is the contact pressure between the coil and the pressure roller by hydraulic or pneumatic force transducers. Since the center distance between the am The circumference of the spool of the pressure roller and the spool are also on the Changes in the center distance at the same time Change in investment power. The problem therefore arises that, on the one hand, always a predetermined contact force between the pressure roller and the spool prevails and on the other hand an unhindered growth of the Coil diameter is possible.

A method and a winding machine are known from EP 0 374 536, in which the evasive movement of the bobbin receiving the bobbin during Spooling travel is regulated depending on the position of the pressure roller. in this connection the evasive movement of the winding spindle can take place gradually or continuously. There the contact force between the pressure roller and the spool from the relative position between the pressure roller and the spool is a change in Contact pressure inevitable during the winding cycle.

From US 5,407,143 a winding machine is known in which the rotary movement a turret with a cantilevered winding spindle controlled in this way is that the contact pressure between a pressure roller and the coil one adheres to the specified setpoint. Here, an actuator for change of the center distance used at the same time to regulate the contact force. Thereby unwanted changes in investment power arise due to stick-slip effects.

A method and a winding machine are known from WO 96/01222 which the rotational movement of the winding turret depending on the Angular position of the winding spindle takes place. From the relationship between the Angular position of the winding spindle on the turret and the diameter of the bobbin changes from the changing diameter to the corresponding angular position closed. Since the pressure roller on the spool is stationary, this causes As the bobbin grows, the contact force between the pressure roller increases and the coil. In addition, the method can - especially in the case of soft coils override the winding turret so that the contact between the pressure roller and the coil is completely lost

The method disclosed in DE 195 38 480 also has the disadvantage that the gradual rotary movement of the winding turret depending on the Angular position of the winding spindle in the course of the winding travel through the Increase in diameter caused inconsistent change in investment power between Coil and the pressure roller causes. In the known method there is a time specified according to which the angular speed of the turret in Depending on the position of the winding turret is recurrently calculated. There the temporal diameter increase of the coil with a small coil diameter in Compared to a large coil diameter, it is essentially faster Change of the angular speed of the winding turret is required Beginning of the winding trip to fluctuations in investment power.

In EP 0 768 271, which falls under Art 54 (3) EPC and represents the closest prior art are movable Spool spindle and a movable pressure roller described. In this writing however only described a winding process in which the winding spindle evasive movement as accurate as possible according to the growth of the Coil diameter. A deviation from this ideal Evasion should be kept as small as possible. The pressing force of the If necessary, the pressure roller should be adjustable separately.

The object of the present invention is to create a method for Winding a continuously running thread and a winding machine to carry out the method such that the thread throughout Reel travel with a specified investment power or a specified investment aircraft profile on the spool at an essentially constant starting speed the thread is wound up.

Another object of the invention is to determine the center distance between the Pressure roller and the spool proportional to the increasing diameter change. Overall, a winding machine and the corresponding Winding processes are provided that meet different requirements can fulfill a winding process in a simple manner.

The solution to the problem results from the features of claim 1 and from the features of claim 15.

When winding a thread at an essentially constant thread speed is the temporal increase in diameter from the respective coil diameter dependent. Thus, the outer diameter of the coil diameter is small Grow coil much faster than with a large outer diameter same amount of thread wound per unit of time. The diameter increase per Time unit can therefore be viewed as a function of the outside diameter of the coil become. This increase in diameter determines the change in the center distance between the spool and the pressure roller. The invention now provides Relationship between the evasive movement of the winding spindle Increasing the center distance between the pressure roller and the spool as well the diameter increase of the coil depending on the coil diameter. The Evasive movement of the winding spindle is therefore variable Speed resulting from a given speed function. The speed function arranges everyone in the course of the coil trip Coil diameter depends on the temporal increase in diameter of the coil certain speed too. The particular advantage of this process is that that the contact force set on the pressure roller is independent of the evasive movement to increase the center distance between the coil and the Pressure roller. The circumferential contact between the coil and the pressure roller remains unchanged as long as the speed of the evasive movement Diameter increase is adjusted.

In cases where the spool is in one by means of the movable carrier linear movement path is guided relative to the pressure roller, the Evasive movement of the winding spindle at a speed that is proportional to the diameter increase of the bobbin during the bobbin travel. This means that the spool can remain intact when the pressure roller is in the same position of the set investment power.

In cases where the bobbin during the winding trip, on a curved Movement path is moved relative to the pressure roller, the evasive movement the winding spindle runs at a speed that is not proportional to the diameter increase. This allows the The speed of the evasive movement also changes Lead investment power. The contact force between the spool and the pressure roller is in a movable pressure roller essentially by the weight the pressure roller determines. So the force of the pressure roller largely dependent on their position in relation to the coil. So the investment power in a very simple way by the evasive movement of the coil during the Influence and control winding. It is of particular importance when building a coil Advantage if the contact force can be changed during the winding cycle. each The set contact force can then be adjusted by a corresponding speed Evasive movements are kept constant.

Another advantage is that the thread is wrapped around the Pressure roller can be influenced. The length of the loop around the thread Pressure roller is referred to as the so-called "print length". The print length thus defines the length from the point at which the thread runs onto the pressure roller Deposit point of the thread on the bobbin. The print length determines the thread guide of the thread on the pressure roller and directly affects the bobbin build-up. So For example, if the print length is too short, the risk of the tee at the Kitchen sink. In these cases, the oscillated thread falls off the end of the bobbin From the bobbin edge. The speed of the evasive movement of the winding spindle leaves therefore pretend that the pressure roller is constantly in a position in which the print length on the pressure roller is constant.

In a particularly advantageous method variant, the winding spindle is equipped with a Speed moves, which is proportional to that in parts of the winding travel Diameter increase of the coil is and thus to an unchanged position of the Pressure roller leads or in some areas not proportional to the diameter increase is the winding spindle, so that the location, the pressure roller in Changed with regard to influencing the investment power or the print length. This Process variant is particularly advantageous to certain contact pressure profiles to be observed during the winding trip. You can also use it to define defined print lengths adjust on the pressure roller during the winding cycle.

When winding a thread into a bobbin, the winding travel is through a Marked winding time in which the coil is completely wound. The winding time depends on the winding speed, the thread titer and the Coil construction. The bobbin has a specific one at each point in the winding cycle Coil diameter. So that each winding time can be a specific one Coil diameter can be assigned. The method variant can thus be used Claim 3 can be used particularly advantageously in processes in which the Winding parameters and thread type remain unchanged. The control of the Evasion movement of the winding spindle can be carried out as a pure time control. The the speed function on which the control is based represents the Relationship between the speed of the evasive movement and the Winding time.

In a particularly advantageous method variant according to claim 4, the Control of the evasive movement of the winding spindle depending on the Coil diameter. By combining the coil diameter and winding time it is possible to directly change the parameters that change in the process capture and thus an exact specification of the speed of the To make evasive movement.

In order to continuously record the coil diameter of the coil to be wound, it is from Advantage if this the position of the carrier of the pressure roller relative to Machine frame or the position of the carrier of the winding spindle relative to Machine frame is determined. Since the pressure roller and the spool are in constant Standing in circumferential contact can only be done from the geometric conditions the respective position of the pressure roller or the calculate the corresponding position of the winding spindle.

This is the position of the carrier of the pressure roller, for example a rocker, or the position of the carrier of the winding spindle, for example also a swing arm, known in its relative position to the machine frame. This There may be a connection between the coil diameter and the position of the carrier Control device of the winding machine can be specified as a master curve. Then the respective could only be measured from the position of the carrier Coil diameter can be detected. At the same time it is the current one Known diameter increase, so the speed of the evasive movement can be controlled accordingly.

The method variant according to claim 6 has the advantage that for detection of the coil diameter, no additional devices are required. To the Keeping thread tension substantially constant during winding the winding speed is regulated with the help of the pressure roller. Here will constantly records the speed of the pressure roller and with a predetermined setpoint compared. The setpoint specifies a constant speed of the pressure roller. at Deviation of the actual speed from the target speed becomes the drive of the winding spindle controlled in such a way that the desired speed is set on the pressure roller. This information already available in a winding machine can be found at this method variant at the same time to determine the coil diameter be used.

In a particularly advantageous method variant according to claim 7, the speed of the evasive movement is calculated in advance from a parameter which characterizes the temporal increase in diameter of the coil and the coil diameter. The relationship can be represented by the following mathematical equation: v = (K 2 / 2) * (1 / D).

Here v is the speed and K the diameter increase parameter and D denotes the coil diameter.

Due to the predetermined speed of the evasive movement, the pressing force can be kept essentially constant during the winding travel. The speed function results from F _v = v (D), ie for each bobbin diameter that is wound during the winding cycle, a specific speed v results.

According to the method variant according to claim 8, the parameter K, the temporal increase in diameter of the bobbin characterizes during the bobbin travel Determine the stationary support of the winding spindle.

To create an asset profile with variable asset power during the winding cycle drive through, the method variant according to claim 9 is particularly advantageous applicable. Here, the position of the pressure roller in the determination of Speed included. The position of the pressure roller can be for example by the pivot angle α of the movable as a swing arm Define the carrier of the pressure roller. From the position of Pressure roller and the coil diameter can be due to the geometric Relation between the pressure roller and the winding spindle through the Calculate the force of the contact force. The speed will then based on the coil diameter, which corresponds to the calculated contact force, and of the diameter increase determined.

Since the contact force between the pressure roller and the spool through the Relative position of the pressure roller to the spool is essentially determined, that is The method according to claim 10 is particularly suitable for determining the contact force and to use it to control the evasion speed.

The method according to claim 11 is particularly advantageous to a continuously winding thread, with an automatic change between a first and a second winding spindle by rotating one Turret revolver takes place. This is done in a winding area at the beginning of the Spool travel the center distance between the pressure roller and the spool through the Evasion movement of the pressure roller with a fixed carrier of the winding spindle changed. During this time, the second winding spindle with one fully wound coil in a so-called parking station. The full coil is in this Time removed from the winding spindle by means of a clearing device and against one Empty sleeve replaced. Then the winding trip is in one Transition area continued such that the center distance through the Evasion movement of the winding spindle is increased. In the transition area the Evasion movement of the winding spindle, however, with such an accelerated Running speed, so that the pressure roller in a short time in their Moved back to the starting position. The starting position of the pressure roller represents here the actual optimal working point of the winding machine. This Working point is therefore only left for the time of clearing, afterwards to be able to be set again as soon as possible. Following the Transition area is then the winding travel in the winding area through the steady Evasion movement of the winding spindle continued.

When dividing the winding trip into a winding area, a transition area and a winding area can be used for the evasive movement of the winding spindle relevant speed function in the winding area during the winding cycle in the Winding area can be determined. The carrier of the Winding spindle (winding turret) silent. The increasing coil diameter causes in this phase, an evasive movement of the pressure roller. The pressure roller is dodge on a guideway determined by the wearer. When going through this guideway will be the weight component acting on the coil surface the pressure roller constantly change. So everyone corresponds Position of the pressure roller a certain contact force.

According to the process variant according to claim 12, the Actual values of the plant force and the control of the evasive movement of the Based on the winding spindle in the winding area. This can be advantageous Weight tolerances of the pressure roller and the carrier of the pressure roller as well any hysteresis forces that occur when the pressure roller moves, be compensated.

Likewise, the possibility is given according to claim 13, the temporal Determine diameter increase in the winding area. From the known Sleeve diameter and the current measured per unit of time Spool diameter is the amount of pade deposited on the spool per Determine the time unit so that the diameter increase of the coil and the parameter K are known. This allows the speed function with which the Evasive movement of the winding spindle in the winding area must be carried out for calculate the total winding travel in advance. Here the speed is the Evasion movement of the winding spindle is equal to the angular speed of the Spindle turret.

The evasive movements of the winding spindle are caused by a drive that drives the respective carrier and its speed can be changed. The Drive is advantageously designed as an electric motor, which by means of a Actuator is controlled to change the drive speed. Depending on The type of carrier for the winding spindle can also be used as a pneumatic cylinder, Pneumatic motor or servo drive.

The winding machine according to the invention is characterized by this that the signals generated to control the winding speed can be used simultaneously to avoid the evasive movement of the winding spindle Taxes. By specifying a speed function depending on the Spool diameter or winding time can drive the turret any time of the winding trip to that of the current diameter increase rate appropriate speed can be set. In parts of the winding trip this does not take place, which changes the position of the pressure roller. That can be desired and be brought about in a targeted manner, or it can be brought about by appropriate Changes in the evasive movement can be compensated again.

To provide feedback on the controlled change in position during the winding cycle. to obtain the bobbin turret is the winding machine according to claim 16 particularly beneficial. Here, the position of the carrier of the pressure roller or the position of the winding turret continuously detected by a position sensor and the Control device abandoned. Because due to the geometric arrangement everyone Position of the pressure roller and each position of the winding turret only one Coil diameter corresponds to a comparison between the control and the Actual position.

The design of the winding machine according to is particularly advantageous here Claim 18, which during the winding trip a running calculation of Speed function for controlling the winding turret calculated. The Winding parameters such as the speed of the pressure roller and the speed of the winding spindle are continuously submitted to a computing unit of the control device. The Calculation can be done both continuously and at intervals, for example Carry out predetermined diameter steps.

According to a particularly advantageous development, the carrier of the pressure roller is connected to a drive. So there is the possibility during the winding trip to wind contactless in certain sections. Because the speed function the winding turret is known during the winding trip, can be in contactless Precisely determine the winding's target diameter for the winding. A cyclical one Lifting the pressure roller from the surface of the spool can also be strong prepared threads can be beneficial to the growing in front of the starting gap To be able to remove the lubricating film. The drive of the carrier is, for example, as Pneumatic cylinder executed.

Further advantageous developments of the invention are dependent in the rest Defined claims.

Further advantages of the method according to the invention are described below with the Embodiment explained in the following drawings.

Fig. 1

die Seitenansicht einer Aufspulmaschine im Betrieb;

Fig. 2

die Frontansicht der Aufspulmaschine aus Fig. 1 im Betrieb;

Fig. 3

ein Diagramm mit einem Geschwindigkeitsverlauf während der Spulreise;

Fig. 4

ein Diagramm mit einem Anlagekraftverlauf während der Spulreise;

Fig. 5

schematisch eine Aufspulmaschine im Anwickelbereich;

Fig. 6

schematisch eine Aufspulmaschine im Übergangsbereich;

Fig. 7

schematisch eine Aufspulmaschine im Wickelbereich.

Fig. 8

schematisch das Kräfteverhältnis zwischen Andrückwalze und Spule und

Fig. 9

schematisch die Andrückwalze in zwei verschiedenen Positionen.

Show it:

Fig. 1

the side view of a winding machine in operation;

Fig. 2

the front view of the winding machine of Figure 1 in operation.

Fig. 3

a diagram with a speed curve during the winding trip;

Fig. 4

a diagram with an investment force curve during the winding trip;

Fig. 5

schematically a winding machine in the winding area;

Fig. 6

schematically a winding machine in the transition area;

Fig. 7

schematically a winding machine in the winding area.

Fig. 8

schematically the balance of forces between pressure roller and spool and

Fig. 9

schematically the pressure roller in two different positions.

In the following, an embodiment according to FIGS. 1 and 2 is common described.

The winding machine has a winding turret 11, which by means of the bearing 20 in a machine frame 9 is rotatably mounted. The winding turret 11 is one Electric motor 40 driven. In the winding turret 11 are two winding spindles 14 and 15 rotatably offset eccentrically offset from each other by 180 °. In Fig. 1 is shown that the winding spindle 14 in the operating position in one Winding area and the winding spindle 15 in a waiting position in one Exchange area of the winding machine is located.

A thread 1 is supplied to the winding machine at a constant speed. The thread 1 is first passed through the head thread guide 2, which is the tip of the Traversing triangle forms Then the thread arrives at a traversing device. The traversing device consists of a traversing drive 6 and Wings 3. The wings 3 alternately guide the thread 1 along a guideline 4 back and forth within the limits of a traverse stroke. The traversing device is movably mounted on the machine frame 9 of the winding machine. This is what a Carrier 7, at the free end of the traversing device is attached and with the other end is pivoted such that the traversing device a Movement perpendicular to itself and to the pressure roller 5, i.e. a Parallel shift, can perform.

Behind the traversing device, the thread on a pressure roller 5 with more deflected as 90 ° and then wound on the spool 17. The coil 17 is on the winding tube 16 is formed. The winding tube 16 is on the freely rotatable winding spindle 14 clamped The winding spindle 14 is with the clamped thereon Bobbin 16 and the bobbin 17 to be formed thereon in the middle winding area.

The winding spindle 14 is supported in the winding turret 11 via the bearing 30. The Winding spindle 14 is driven by a winding spindle drive 27, which for example as a synchronous motor or asynchronous motor Spool spindle drive 27 is aligned with the spindle 14 on the turret 11 attached. The winding spindle drive 27 is connected by a frequency transmitter 21 Three-phase current supplied by controllable frequency. The control of the frequency transmitter 21 is done by a control unit 34, which is controlled by a speed sensor 35 becomes. The speed sensor 35 scans the speed of the pressure roller 5. By the Control unit 34, the frequency generator 30 of the winding spindle 14 is controlled so that the Speed of the pressure roller 5 and thus also the surface speed of the Coil 17 remains constant despite the increasing coil diameter.

If the winding spindle drive 27 is formed by an asynchronous motor, a Detection of the speed of the winding spindle by a speed sensor (not here shown). The signal from the speed sensor is given to control unit 34. The Control unit 34 now regulates the winding spindle speed to one in an inner loop constant value. The signal of the speed sensor 35, the speed of the Pressure roller detected, leads in an outer control loop that the Spool spindle speed is changed.

The second winding spindle 15 is eccentric via a bearing 29 in the winding turret 11 arranged and is driven by means of a spindle drive 28. The Reel spindle drive 28 is currently deactivated because the reel spindle 15 for replacement a full bobbin is ready against an empty tube 18

The winding turret 11 is rotatable in the machine frame 9 of the winding machine stored and is driven by the electric motor 40 in the direction of rotation 23. The Electric motor 40 is designed, for example, as an asynchronous motor. The Electric motor 40 serves to rotate the turret 11 in the sense that the Center distance between the pressure roller 5 and the winding spindle 14 as it grows Coil diameter is increased. The electric motor 40 is used for this purpose Actuator 13 frequency controlled so that the turret 11 any Can execute rotational speed in the direction of rotation 23. Here, however, in Connection with a polarity reversal also a rotational movement against the Direction of rotation 23 are given to the winding turret.

1, the pressure roller 5 is mounted on a rocker 8, so that the Pressure roller makes a movement in radial component to the winding spindle 14 can execute. The rocker 8 is on the machine frame 9 about the pivot axis 25 pivoted. The pivot axis 25 is through a rubber block formed (not shown here). This rubber block is fixed in the machine frame clamped. The rocker 8 is attached to the rubber block, so that the rocker 8 is elastically pivotable. This rubber-elastic storage works like a spring on the rocker 8 in the sense of increasing the contact pressure acts. By a relief device 12 which can be acted upon pneumatically and which acts on the rocker 8 from below against the weight, the weight, that bears on the pressure roller and thus as a contact force on the spool 17, entirely or partially compensated so that a fine adjustment of a basic value the desired contact pressure between the contact roller and the coil surface is adjustable. The relief device 12 can be controlled via a control device 10 to be controlled. A position sensor 19 is arranged below the rocker 8. The Position sensor 19 detects the stroke of the pressure roller 5 or the pivot angle of the Swing 8 relative to the machine frame 9. The sensor could therefore be considered a Be implemented. The sensor 19 is connected to a control device 10 connected. The control device 10 is also connected to the control device 34 and the Converter 13 coupled.

At the free end of the rocker 8, on which the pressure roller 5 is rotatable is mounted, a force sensor 41 is arranged to detect the contact force between the pressure roller 5 and the coil 17 is used. The force sensor 41 can for example, be formed by strain gauges, which the bearing load of the pressure roller to capture.

The operation of the winding machine is described below.

The coil 17 is wound on the sleeve 16. As the bobbin diameter increases the winding turret 11 is continuously with a predetermined Speed of rotation in the direction of rotation 23 moves. The speed of rotation is here controlled by the actuator 13 and the electric motor 40. For this purpose, the actuator 13 connected to the control device 10. In the control device 10 is based on the speeds of the pressure roller 5 given by the control unit 34 and the Speed of the winding spindle 14 of the currently wound bobbin diameter calculated. From a master curve stored in the control device 10 between the bobbin diameter and the speed of rotation of the bobbin turret the associated coil diameter can thus be associated with it Determine the speed of rotation of the turret. The master curve is over a Input 24 of the control device 10 abandoned. The control device 10 inputs corresponding control signal to the actuator 13 so that the electric motor 40 with the certain rotational speed is operated. Is the rotational speed of the Turret turret precisely adapted to the diameter increase, so that remains Pressure roller 5 unchanged in its position. If it is too slow The speed of rotation or the speed of rotation changes too quickly Position of the pressure roller. This change in position is detected by sensor 19 detected. The sensor 19 leads its signal directly to the control device 10 Control device 10 is now a correction of the rotational speed so that the Pressure roller is moved back into its new position. So the set remains Contact force between the pressure roller and the spool essentially unchanged.

With the help of the signals given by the control unit 34, the Calculate diameter increase per unit of time. This gives you the opportunity to predefined speed function on the actual diameter increase adapt or calculate in advance. In this case, the control device 10 a computing unit that a running or gradual calculation of the Diameter increase and a correction and advance calculation of the Speed function for moving the winding turret determined. This The speed function is then determined by the control device 10 as Basis for controlling the drive of the winding turret taken.

However, there is also the possibility of a tax liability to specify the programmed course of the winding trip in such a way that in certain Areas of the winding trip the pressure roller is deflected from its target position. For this purpose, a speed of rotation is set on the turret that is less than the corresponding increase in diameter. By doing this, it is possible to change the contact force between the pressure roller and the spool. By deflecting the pressure roller 5 from its position Increase investment power due to the geometric changes. The investment power is detected by means of the force sensor 41 and given to the control device. To a target-actual comparison can thus continuously the speed of Evasive movement to be corrected.

In particular in the case of a winding machine according to FIGS. 1 and 2 with two winding spindles has the procedure shown in Fig. 3 for winding a thread proven.

A speed function F _{v is shown} in a diagram in FIG. 3, the coil diameter D being plotted on the abscissa and the rotational speed of the turret v being plotted on the ordinate. The winding trip is essentially divided into three sections. The first section I is the winding area at the beginning of the winding trip. The second section II is the so-called transition area, and section III is the wikel area. The winding area I begins at a coil diameter D ₁ . D ₁ is the diameter of the empty tube. This means that the thread has just been caught on the empty tube and the winding travel begins. In this phase I, the winding turret is not rotated. The speed function F _v shows zero speed. The winding spindle is thus fixed. The increase in diameter between D ₁ and D ₂ is absorbed by the evasive movement of the pressure roller. The pressure roller is thus pivoted evenly on the rocker 8 in this phase. After reaching the coil diameter D ₂ , the electric motor of the turret is activated. A steadily accelerated rotary movement is set on the winding turret. The speed function Fv increases linearly. It is thereby achieved that the pressure roller 5 is pivoted back very quickly into its starting position at the beginning of the winding cycle. This transition area II is thus passed through very quickly. The starting position of the pressure roller represents an optimal working point for the further course of the winding cycle. At the end of the transition area, the coil diameter is D ₃ . Now the speed of rotation of the winding turret is no longer accelerated. The evasive movement of the winding spindle is now adapted to the diameter increase of the coil. The speed function F _v shows a course which is essentially proportional to the diameter increase, ie the speed of the winding turret decreases hyperbolically with increasing coil diameter. There is a uniform delay in the rotary movement of the winding turret, which is adapted to the increase in diameter. The winding cycle is ended after reaching the full winding with the maximum bobbin diameter D ₄ .

There is then a change of thread from the wound full bobbin to one Empty tube. For this purpose, the winding turret becomes so with increased rotational speed pivoted that the second winding spindle with an empty tube in the thread run is swung in. The winding spindle with the empty tube was previously on the Winding required speed driven. As soon as the empty tube with a Immersing the slit in the thread run, the thread is caught on the empty tube and tears between the full spool and the empty tube, so that the new winding process can start.

A further diagram is shown in FIG. 4, the reel diameter D being plotted on the abscissa and the contact force P between the reel and the pressure roller on the ordinate. It can be seen here that the contact force in the winding area I initially increases linearly between the diameters D ₁ and D ₂ . Due to the evasive movement of the pressure roller, the relative position of the pressure roller to the spool changes continuously, so that the weight force of the pressure roller acting on the spool changes, in this case increases. With the simultaneous movement of the pressure roller and the turret, there is only a slight increase in the contact pressure in transition area II. In winding area III, an essentially constant contact force is then achieved by controlling the turret rotation speed. In winding area III, the speed function is determined by the specified contact force. When using a winding machine according to FIG. 1, the change in speed is not proportional to the increase in diameter, since the change in contact force has to be compensated for due to the change in position of the winding spindle. This compensation can be done by step or steady change of position of the pressure roller, which is controlled by the speed of rotation of the winding turret.

The procedure - as described according to FIG. 3 - leads to the schematic positions shown in FIGS. 5 to 7 in a winding machine. The winding turret 11 is stationary in the winding area (FIG. 5). The winding spindle 14 thus remains in its position. The pressure roller 5 is therefore pivoted on the rocker 8 by an angle α until the coil diameter D _{2 is reached} in the direction of movement 32 in order to avoid the increasing coil diameter.

The evasive movement of the pressure roller can also be done, for example a drive (12) take place which engages the rocker.

After the rocker 8 has covered a maximum swivel angle α _max , which is given up by the sensor 19 of the control device 10, the rotary drive of the turret 11 is activated. Here, the control device 10 will control the rotary drive in such a way that the winding turret is moved at a maximum accelerated speed until the pressure roller 5 has returned to its starting position (FIG. 6). In this phase, the winding turret has traveled the angle of rotation β ₁ in the direction of rotation 23. After the pressure roller has reached its starting position and in the meantime the bobbin diameter has increased to D ₃ , the rotary drive of the bobbin turret 11 is controlled by means of the control device 10 such that a rotational speed which is dependent on the diameter increase is set on the bobbin turret. By the end of the winding cycle, the winding turret has traveled the angle of rotation β ₂ .

Due to the fact that the pressure roller and the spool in constant Circumferential contact can be kept from the geometic relationships, both from the position of the pressure roller and the current Coil diameter determine the respective position of the turret or from the Position of the turret and the current diameter of the coil the position the pressure roller. A position sensor on the turret can also be used be attached, which detects the angular position of the turret and the Control device gives up. In this case, the position sensor on the rocker Pressure roller is not required.

The control of the evasive movement can also be done by a The position of the pressure roller and the winding spindle is determined because each position defines a coil diameter. In this case, the control device is included a position sensor for the pressure roller and with a position sensor for the Turret connected. The sensor signals become the current one Coil diameter and the diameter increase determined. The The increase in diameter then leads from a stored master curve to the speed of the evasive movement to be set.

The method according to the invention cannot only be carried out by one according to FIGS. 1 and 2 described winding machine are executed but is also advantageous Can be carried out by winding machines with only one winding spindle. The winding spindle is stored on a movable support. The carrier of the winding spindle is there coupled with an inverter-controlled drive. The carrier can be as Swing arm to be executed, which is mounted on one side on the machine frame.

Likewise, the carrier of the winding spindle or the pressure roller as one Linear guide be carried out in the case of a carriage by a linear drive is driven.

In particular, the method according to the invention is also suitable for changing the contact force solely by changing the rotational speeds of the carrier of the winding spindle or winding turret. The contact force acting between the pressure roller and the spool results from the weight of the pressure roller. 8 shows the force ratio between the pressure roller 5 and the spool 17. The weight of the pressure roller is denoted by G, which has a vertical direction of action. The contact force P, which acts between the pressure roller and the spool 17, has, as the direction of action, the connecting line between the axis center M _{A of} the pressure roller and the axis center M _{S of} the winding spindle. The coil 17 has the diameter D ₁ in this phase. The coil 17 now grows from the diameter D ₁ to the diameter D ₂ in the course of the winding cycle. The position of the winding spindle is not changed. Here, the axis center M _{A of} the pressure roller will move on a circular guide path F _A , the center of which is formed by the axis center M _{T of} the pivot axis of the carrier or the rocker. The carrier or the rocker of the pressure roller is thus shifted by the angle α. Since the weight G of the pressure roller remains unchanged, one that acts between the pressure roller 5 and the spool 17 will act due to the changed angular position. Result in contact force P _α . The winding machine according to the invention thus offers the possibility of setting a contact force which is desirable for the formation of the bobbin simply by changing the position of the pressure roller. The weight G of the pressure roller could be increased or relieved by a force sensor as required by a constant value. If a contact force desired for the bobbin build-up is set by changing the position of the pressure roller, the pressure roller is then held in position by moving the winding spindle away by means of the turret.

For example, in the winding area, the speed of the To get the winding turret generated change in investment power, there is Possibility to briefly stop or close the speed of the winding turret slow down, so that the diameter increase leads to a change in position of the Pressure roller leads. As soon as the position of the Pressure roller is reached, the speed of the winding turret on the Diameter increase proportional value increased. It is also possible that To increase the speed of the turret so that it is greater than that for the increase in diameter required speed. In this phase the Pressure roller deflected in the opposite direction. Once the one you want Contact force between the pressure roller and the spool is reached Speed back to the value proportional to the diameter increase set. This results in a high flexibility in the construction of the coil.

Constant control of the rotational speed of the carrier or of the turret take place in that a sensor detects the speed of the evasive movement detected and given as the actual value of the control device. In the Control device can therefore a constant based on an actual-target comparison Speed correction can be made.

The method according to the invention can also advantageously be used to change the thread wrap on the pressure roller during a winding cycle. For this purpose, the pressure roller is shown in two different positions in FIG. 9. The pressure roller can be guided, for example, by a rocker which is rotatably mounted in the pivot axis MT. In the lowest position of the pressure roller, a coil with the diameter D _{1 is} wound on the winding spindle. In the upper position of the pressure roller, the bobbin on the winding spindle has grown to the diameter D ₂ .

The pressure roller and the winding spindle are so to the thread run that a the surface line of the pressure roller running thread 1 only after partial wrap placed on the pressure roller on the spool surface of the spool to be wound becomes. The looping area of the thread 1 on the pressure roller is here characterized by the angle γ. This partial length of the perimeter is also called so-called print length The print length has a significant influence on the coil structure. To achieve an undisturbed coil build-up is one Minimum print length required on the pressure roller.

In Fig. 9, the wrap angle of the pressure roller at the lower position is marked Y1. In contrast, the wrap angle in the upper position of the pressure roller is designated by γ ₂ , the wrap angle γ _{2 being} smaller than the wrap angle γ ₁ . The print length can thus be influenced solely by changing the position of the pressure roller. In particular in the case of a winding spindle guided on a winding turret, the print length will increase as the axial distance between the winding spindle and the pressure roller increases. Such a change in the print length can be compensated for by changing the position of the pressure roller in the meantime. With this, the speed of the winding turret can also be determined as a function of a print length to be maintained on the pressure roller.

LIST OF REFERENCE NUMBERS

1

thread

2

Yarn guide

3

wing

4

guide bar

5

pressure roller

6

Traversing drive

7

carrier

8th

wing

9

machine frame

10

control device

11

spindle turret

12

relief device

13

inverter

14

winding spindle

15

winding spindle

16

winding tube

17

Kitchen sink

18

winding tube

19

position sensor

20

camp

21

frequency generator

23

rotation

24

entrance

25

swivel axis

26

axis

27

winding spindle drive

28

winding spindle drive

29

spindle bearing

30

spindle bearing

31

Kitchen sink

32

movement direction

33

movement direction

34

control unit

35

Speed sensor

40

electric motor

41

force sensor

Claims (20)

1. Method of winding a continuously advancing yarn to a package, wherein the package is formed on a driven winding spindle mounted in cantilever fashion on a movable support (8), wherein a contact roll (5) mounted on a second movable support (8) rests against the circumference of the package with a force that can be varied by the position of the contact roll (5) relative to the package, and wherein a change of the center distance between the package and the contact roll (5), which is required by the diameter increase of the package, is effected by an evading movement of the contact roll (5) an/or by an evading movement of the winding spindle (14) as a function of the increasing package diameter, wherein the evading movement of the winding spindle (14) is controlled during the winding cycle by a predetermined speed function (Fv), which associates in the course of the winding cycle to each package diameter (D) a certain speed (v) of the evading movement wherein at least within phases of the winding cycle, the speed (v) as determined by the speed function (F_v) differs from the speed required to compensate the diameter increase of the package so that position of the contact roll (5) is changed.
2. Method as in claim 1, characterized that within other phases of the winding cycle, the speed (v) as determined by the speed function (Fv) is proportionate to the diameter increase of the package during the winding cycle, so that the package builds up while the position of the contact roll (5) remains substantially unchanged.
3. Method as in claim 1 or 2, characterized in that the control of the evading movement of the winding spindle (14) occurs during the winding cycle as a function of a winding time.
4. Method as in one of claims 1 or 2, characterized in that the control of the evading movement of the winding spindle (14) occurs during the winding cycle as a function of the package diameter.
5. Method as in claim 4, characterized in that the package diameter is determined by the position of the support (8) of the contact roll (5) and/or the position of the support of the winding spindle.
6. Method as in claim 4, characterized in that the package diameter is determined by the speed ratio of the speed of the contact (5) roll and the speed of the winding spindle (14).
7. Method as in one of claims 1 to 6, characterized in that the speed (v) of the evading movement is computed in advance from a parameter (K) that determines the chronological diameter increase of the package and from the package diameter (D) as a function of the winding time or the package diameter.
8. Method as in claim 7, characterized in that the parameter (K) is determined during the winding cycle while the support of the winding spindle (14) is stopped.
9. Method as in one of claims 1 to 6, characterized in that the speed (v) of the evading movement is predetermined from a parameter (K) that determines the chronological diameter increase of the package, the package diameter (D), and the position of the contact roll (a) as a function of the winding time or the package diameter.
10. Method as in claim 9, characterized in that the parameter and the contact force between the contact roll (5) and the package are determined as a function of the position of the contact roll (5) relative to the package during the winding cycle, while the support of the winding spindle (14) is stopped.
11. Method as in one of claims 1 to 8, wherein the support of the winding spindle is formed by a spindle turret mounting a second winding spindle (14), characterized in that in a winding start range at the beginning of the winding cycle, the contact roll (5) is moved out of an initial position while the support (8) of the winding spindle (14) is stopped; that in a range of transition, the contact roll (5) and the winding spindle (14) are moved together at a constantly increased speed, until the contact roll (5) reaches its initial position before the start of the winding cycle; and that in a winding range, the winding spindle (14) is moved away by the spindle turret (11) in accordance with a predetermined speed function, which associates in the course of the winding cycle to each package diameter a determined speed of the evading movement.
12. Method as in claim 11, characterized in that the actual values of the contact force are determined as a function of the position of the contact roll (5) during the winding cycle within the winding start range, and that the speed of the spindle turret (11) is changed as a function of the comparison between the actual value of the contact force and the desired value of the contact force that is predetermined by a profile.
13. Method as in claim 11 or 12, characterized in that the function of the speed of the spindle turret (11) is computed in advance for the winding range from the winding parameters that are determined during the winding cycle within the winding start range.
14. Method as in one of claims 1 to 13, characterized in that the evading movement of the winding spindle (14) is carried out by a speed-variable drive of the support of the winding spindle (14).
15. Takeup machine for carrying out the method of one of claims 1 to 14, with a yarn traversing mechanism, with a contact roll (5) mounted on a support (8) that is movable relative to a machine frame, with a winding spindle (14) mounted in cantilever fashion to a rotatable spindle turret (11), with a drive (40) for the spindle turret (11), and with a control device (10) for controlling an evading movement of the winding spindle (14) as a function of the diameter increase of the package, wherein the control device (10) has an input (24) for the input of a speed function (F_v), which associates in the course of the winding cycle to each package diameter (D) a determined speed (v) of the evading movement, and that the control device (10) is connected to a controller (34) for determining the package diameter (D) or the winding time, so that the speed-variable drive (40) of the spindle turret (11) is activatable by the control device (10) in accordance with the speed function (F_v), wherein at least within phases of the winding cycle, the speed (v) as determined by the speed function (F_v) differs from the speed required to compensate the diameter increase of the package so that position of the contact roll is changed.
16. Takeup machine as in claim 15, characterized in that a position sensor (19) for determining the position of the support (8) of the contact roll (5) or of the spindle turret (11) is connected to the control device (10).
17. Takeup machine as in claim 16, characterized in that the support is designed and constructed as a rocker arm (8) unilaterally mounted to the machine frame, and that a position sensor (19) is constructed as an angle pickup device for determining the angle of traverse of the rocker arm (8).
18. Takeup machine as in one of claims 15 to 17, characterized in that the control device (10) includes a computing unit, which computes from the winding parameters supplied by the controller (34) the speed function (F_v) for controlling the spindle turret speed.
19. Takeup machine as in one of claims 15 to 18, characterized in that the control device (10) is connected to a force sensor (41) for determining the contact force between the contact roll and the package, and that it includes a storage unit for storing the actual values of the contact force as a function of the position of the support mounting the contact roll.
20. Takeup machine as in one of claims 15 to 19, characterized in that the support (8) of the contact roll (5) includes a drive (12), which can be activated via the control device (10).

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