EP0931189A1

EP0931189A1 - Method and device for winding a roll beam

Info

Publication number: EP0931189A1
Application number: EP97911218A
Authority: EP
Inventors: Hubert Kremer
Original assignee: Sucker Mueller Hacoba GmbH and Co
Current assignee: Sucker Mueller Hacoba GmbH and Co
Priority date: 1996-10-14
Filing date: 1997-10-13
Publication date: 1999-07-28
Anticipated expiration: 2017-10-13
Also published as: DE19642410A1; EP0931189B1; PT931189E; WO1998016674A1; DE59707074D1; ES2175367T3

Abstract

Method and device for winding a roll beam (10) wherein multiple threads (11) are wound between the side disks (12) of the roll beam almost entirely across its width and the position of the side disks (12) of the roll beam (10) in relation to the multiple threads is detected according to a measuring technique, both are lined up accordingly and deviations of relative positions from line-up are corrected during winding as thickness of winding is measured by optical sensors (14) in each case close to disks (12) and between disks (12), whereupon measurement values of side disk areas are compared with measurement values of middle area, and measures are taken to eliminate deviations between these values. In order to enable corrective action to have automatic effect on coil as well as during winding process and to maintain the possibility of using a press roller to act on the winding, the threads wound onto the roll beam (10) are compressed by a press roller (17) which is located on the side where said threads are wound thereon and optical distance sensors are used as optical sensors (14,14') which are securably mounted below press roller (17).

Description

Method and device for winding a warp beam

The invention relates to a method for moving a warp beam with the method steps according to the preamble of claim 1.

When winding a warp beam, it is important that the threads of the thread sheet between the side windows of the warp beam are wound evenly distributed over the width of the warp beam. For this purpose, DE-A-34 04 255 discloses a method with the above-mentioned method steps, in which light barriers are used to determine the measured values, each of which consists of a light source and a receiver which are arranged on support arms, so that a light beam is emitted Light source can measure tangentially on the winding of the warp beam. Since the winding thickness changes when the thread sheet is wound up, the support arms for pivoting are fastened to a pivotable support shaft which is arranged on the thread feed side at approximately the height of the warp beam axis and parallel to it and is adjusted as the winding thickness increases so that the sensors are tangential to the winding circumference can measure. The support shaft construction for the sensors is structurally complex and prevents the arrangement of a pressure roller on the gate side or thread inlet side, which is expedient or may be necessary for leveling the winding.

The invention is therefore based on the object of improving a method with the method steps mentioned at the outset in such a way that corrective interventions in the winding can also take place automatically during winding, with the possibility of using a press roller acting on the winding of the warp beam being retained should.

CONFIRM NGCOPY This object is achieved by the method steps specified in the characterizing part of claim 1.

It is important for the invention that it is determined in the vicinity of the side windows whether there are accumulations of threads or empty thread areas. In order to be able to carry this out unambiguously, it is of further importance that the measured values of the side window regions are compared with measured values which are obtained from a central region. The middle range provides the actual values with which the measured values from the vicinity of the side windows are compared. If thread accumulations or empty thread areas would occur in the vicinity of both side windows, a comparison of these measurement results from the vicinity of the two side windows would lead to misinterpretations. If it is found in the method according to the invention that incorrect winding-up which requires compensation takes place, measures are initiated with which the incorrect winding-up or the deviation are eliminated.

It is also important for the invention that optical distance sensors are used as optical sensors, which can be used in a fixed arrangement. The fixed arrangement is close to the floor and below a pressure roller that presses on the roll. The roll is leveled with the pressure roller. Since the pressure roller is arranged in the winding direction in front of the sensors, the measurement result is influenced accordingly. In particular, the measured values from the middle range, which form the basis for the comparison of the measured values, are smoothed.

The measures to eliminate the deviations vary depending on the type of winding and the warp beam. Frequently a traversing is carried out, in which the thread strand is slightly moved back and forth between the side windows in order to achieve a uniform winding structure, in which the wound threads do not in particular wrap into one another and thus jam. In this case, the method can advantageously be modified such that a measure eliminates the deviations Traversing the warp beam, a warping drum or one

Scissors comb is changed. The warp beam or warping drum will mainly be moved if other measures are not possible. This is the case with warping, for example, because a scissor comb is usually not used here for wrapping the thread sheet from the warping drum to the warp beam. If, on the other hand, a scissors comb is available, the traversing of the scissors comb can be changed. Scissor combs are used for tipping when the thread sheet is wound onto the warp beam from the bobbins of a creel.

Moving the warp beam or the warping drum or the scissors comb compensates for errors that occur to the same extent on each side window. For example, the traversing can be increased if there are empty thread areas near both side windows. An increase in the traverse then leads to a better distribution of the threads over the entire width of the warp beam. Instead of changing a traversing, the same effect can be achieved with the slip that the scissor comb is set wider or narrower as the measure eliminating the deviations. As a result, the thread sheet is fed wider or narrower and there is equalization of empty thread areas that occur on both side windows of the warp beam, or thread accumulations on the two side windows of the warp beam are avoided.

The method can advantageously be carried out in such a way that the warp beam and / or the scissors comb are or are displaced axially parallel to the warp beam as the measure eliminating the deviations. There is an adjustment of the relative position of the side windows of the warp beam to the thread sheet, whereby the setting of the warp beam is always possible, but the setting of the scissors comb is only possible with the slip. In all cases, errors are avoided in which thread accumulation occurs on one side window, while empty thread areas occur on the other side window of the warp beam. It is furthermore advantageous to carry out the method in such a way that it is automatically terminated if at least one measured value of a side window area lies above the measured value of the middle area when the zero and / or minimum scissor bar width is changed, or if at least with a maximum scissor bar width and / or maximum change a measured value of a side window area is below the measured value of the central area. If, at zero traversing, at least one measured value of a side window area is above the measured value of the central area, there is an accumulation of thread, but it can no longer be influenced by a reduction in traversing. The same applies if the minimum scissor comb width is set. In this case the tree width is too small for the thread group. If at least one measured value of the side window area is below the measured value of the central area at the maximum scissor comb width, a thread empty area has occurred which cannot be influenced by increasing the scissor comb width. The same applies in the event that a maximum oscillation has already been set. In both cases, the width of the thread band is not large enough to evenly wind the warp beam.

The method can be carried out in such a way that the determination of deviations over the thickness of the roll is carried out in intervals, and that measures and their reactions are carried out in the interval pauses. This means that measurement and setting is carried out section by section. This is usually sufficient and no expensive means are required to avoid errors while measuring and correcting at the same time.

The invention relates to a device for winding a warp beam with the features of the preamble of claim 7.

The disadvantages described above apply to this device known from DE-A-34 04 255.

The invention has for its object a device with the features of the preamble of claim 7 to improve so that corrective interventions in the winding can also take place automatically during winding, with the possibility of using a press roller acting on the winding of the warp beam to be retained.

This object is achieved by the features of the characterizing part of claim 7.

There are optical distance sensors, the measuring beams of which are each directed onto the winding of the warp beam in such a way that adjustment as the winding thickness increases is not necessary. The distance sensors can thus be present in a fixed arrangement, specifically where they do not interfere, namely below the space for a pressure roller. The pressure roller presses on the winding of the warp beam and equalizes the winding, while pressing on the running threads. It is arranged in the thread running direction in front of the distance sensors, so that the leveling of the winding can have the effect described above. Above all, however, the pressure roller and the distance sensors are arranged in an area where they do not interfere with the removal of the wound warp beam, namely on the thread run-up side or gate side. Accordingly, the warp beam can be removed and inserted unhindered on the side of the device facing away from the pressure roller.

The optical distance sensors enable contactless measurement and can interact with simply constructed evaluation units. The optical distance sensors are quick to respond and deliver highly precise measured values.

The sensors that measure the winding thickness are, together with the winding thickness sensor, measuring sensors, the measured values of which are supplied by an evaluation unit in the sense of determining differences in the measured values. With the evaluation unit, it is possible to influence the adjusting device in such a way that the relative position of the side windows and the thread sheet can be influenced automatically during the winding. The device can be designed such that the adjusting device acts on an axial adjusting device and / or a traversing device of the warp beam and / or a warping drum. Such designs are to be used in a large number of winding machines, both in slip paper and in warping.

When attaching, the device is advantageously designed in such a way that the adjusting device influences the traversing of a scissor stay and / or its relative position parallel to the warp beam and / or the width of the scissor stay. The adjustment means are then less expensive because less mass has to be moved.

The device can be designed such that measuring beams of all sensors are arranged in the same plane through the longitudinal axis of the warp beam. As a result, measurements are taken in a plane in which the winding must be of the same thickness at all measuring points.

It is advisable if all sensors are mounted on a beam parallel to the warp beam. Conventional assembly devices can be used and a reliable fixed arrangement is thus achieved.

The invention is explained in more detail using an exemplary embodiment shown in the drawing. It shows:

Fig.l is a side view of a partially wound warp beam, and Fig.2 is a view in the warp beam longitudinal direction on a schematically shown warping machine.

The warping machine has a warp beam 10, which is rotated by a drive motor and winds up a family of threads 11. The thread sheet 11 consists of a plurality of threads that are unwound from bobbins of a creel. The thread sheet 11 passes through a scissors comb 13 and is fed to the winding tree 10 via a deflection roller 15. The Warp beam 10 has a warp beam axis 10 'which is delimited on both sides by a side window 12. On the outside of each side window 12 there are flange means 16 for pivoting the warp beam 10, to which a motor (not shown) engages. The scissor comb 13 ensures an orderly supply of the threads of the thread sheet 11 to the deflection roller 15. A predetermined number of threads are inserted into each scissor comb gap, so that the thread sections leaving the scissor comb 13 are arranged next to one another and thus also on the deflection roller 15 and thus run up the warp beam 10. 2 shows the course of the thread sheet at the beginning of the winding process with a thread sheet section 11 'and towards the end of the winding process with a thread sheet section 11''. Starting at 11 ', the winding is built up in layers until the diameter of the side window 12 no longer permits further winding. Proper winding must take place between the side windows 12 in such a way that the practically warp beam-wide thread family 11 lies on average with its center over the middle between the two side windows 12. It should be taken into account here that the thread sheet is usually traversed so that when the thread sheets lie one on top of the other, the threads do not lie exactly one above the other, but are wound laterally offset. The result is a more stable construction of the winding 15. With such a construction, the threads that are under winding tension are prevented from cutting into the threads that have already been wound up. To further even out the winding structure, it is shown in FIG. 2 that the running threads of the thread share section 11 'can be pressed on by a pressure roller 17.

Conventionally, it is difficult to set the exact thread feed. The initial position of the thread sheet 11 between the side windows 12 can be adjusted by eye, or measuring aids are used with which the relative position between the warp beam 10 and thread sheet 11 is adjusted in the axial direction of the warp beam. Nevertheless, it can happen that the threads near the side window of the thread sheet 11 run against the side window 12 or move away from it. This is particularly possible if chan- is greeded. Such traversing is achieved, for example, by slightly moving the warp beam 10 back and forth in its axial direction. Instead of or at the same time, it is also possible to move the thread group back and forth. For this purpose, influence can be exerted on the warping drum or on the scissors comb 13. 2 shows a motor M1 with which the scissor comb 13 can be made wider or narrower in order to be able to adjust the width of the scissor comb 13 to the warp beam width available between the side windows 12. M2 denotes a motor with which the scissors comb 13 can be adjusted vertically to the plane of the drawing as a whole and in its width in order to be able to influence the relative position of the side windows 12 and the thread sheet 11. In this way, for example, the center of the thread sheet 11 is set to the center of the warp beam located between the side windows 12. In principle, the traversing can also be effected with the motor M2, but a special third motor, which has not been shown, is more advantageous for traversing the scissors comb 13. The control of the motors described for the scissors comb 13 and for the warp beam 10 is carried out by an evaluation unit, not shown, which interacts with sensors 14, 14 '. The measured values of the sensors 14, 14 'influence, via the evaluation unit, an actuating device influencing the relative position of the side windows 12 and the thread sheet 11, for example the servomotor for traversing with the scissors comb 13.

Inaccuracies in the setting, the behavior of the family of threads 11 when winding up and the behavior of the warp beam 10 when winding up can lead to the winding 15 developing differently from the ideal. Fig.l shows the two basic possibilities of incorrect winding construction. Accumulations of thread can form near the side disks 12, which lead to an increasing winding circumference 18. However, there can also be empty thread areas 19 which lead to a falling winding circumference 20 in the vicinity of the side windows 12. Both forms of appearance can be detected with the sensors 14. The sensors 14 are optical distance sensors and emit measured values corresponding to the respective distance. Because the phenomena described above can occur on both side windows 12, measurements are required in the immediate vicinity of these side windows.

A winding thickness sensor 14 'is present between the measuring points of the sensors 14 and measures, for example, exactly in the middle between the two side windows 12. All sensors 14, 14 'are arranged in the same way, ie measure at the same circumferential point of the winding 15 or assume the same angular position with respect to any radial beam of the warp beam 10. This is shown in FIG. 2, which shows a carrier 21 for mounting the sensors 14, 14 '. The mounting device was not carried out because it is arbitrary. The radially arranged sensors 14, 14 'each generate a measuring beam 22 and all measuring beams 22 lie in the same plane through the longitudinal axis of the warp beam 10.

If the measured values of the sensors 14 deviate from the measured value of the winding thickness sensor 14 ', action is required. Measures must be taken to eliminate the deviations. It does not matter that the actual value of the winding thickness is measured with a medium thickness sensor 14 '. The respective average winding thickness can also be determined in some other way, for example with a plurality of winding thickness sensors or originating from the pressure roller 17. The evaluation unit is able to carry out the necessary measurement transformations for the required evaluation.

The measures to be taken in each case to eliminate the deviations in the winding thickness near the side windows 12 depend on the winding method carried out in each case. The control device, which is formed by the sensors, the evaluation unit and the actuating means, is able to recognize the respective error and to automatically take suitable measures to eliminate it.

If a change in the circumference of the winding is found only near a side window 12, ie if there is only one increasing circumference 18 or one decreasing circumference 20, the scissors comb 13 is moved in the direction of the falling wrap circumference or against the direction of the increasing wrap circumference. If there are respectively increasing or decreasing wrapping circumferences near each side window 12, the scissors comb 13 is set wider or narrower. If an increasing winding circumference 18 is present on one of the side discs 12 and a decreasing winding circumference 20 is present on the other side disc 12, the scissor comb 13 is adjusted in the direction of the decreasing circumference 20.

Alternatively, if the winding circumference 18 increases on both sides or the winding circumference 20 decreases, the traversing carried out with the scissors comb 13 can be changed, with the winding circumference 18 increasing, the winding circumference 20 decreasing and increased.

In the case of warping with subsequent trees, that is to say with subsequent winding of the thread sheet from the warping drum onto the warp beam 10, corrective measures cannot be carried out by influencing the position of a scissor comb, since such is usually not used. Nevertheless, corrective measures are possible by changing the relative position between the warp beam 10 and the thread sheet 11 by influencing the position of the warp beam 10. If a cluster or a thread empty area is found only near one of the side windows 12, that is to say an increasing or decreasing winding circumference 18 or 20, the warp beam 10 can be displaced. With a decreasing winding circumference 20 away from the thread empty area 19 and with an increasing winding circumference 18 in the direction of the accumulation. If accumulations or empty thread areas occur on both sides, these cases can also be eliminated by changing the oscillation of the warping drum. If an empty thread area 19 is formed on one side window 12 and a cluster on the opposite side window 12, the warp beam 10 is shifted in the direction of the cluster. As a result, more threads are wound near the side window 12 with the thread empty area 19 so that the thread empty area 19 disappears, and less threads are wound up so that the accumulation disappears. The measures described for the warping can also be used in a warping machine according to FIGS. 1, 2, either exclusively or in addition to the measures with the scissors comb 13.

If accumulations or empty threads 19 occur on the two side windows 12 during warping, an adjustment of the warp beam 10 is not useful if both winding errors are the same. In this case, the traversing must be influenced by reducing it when clusters occur and enlarging them when thread empty areas 19 occur.

With both of the winding methods described above, it may happen that the traversing is zero or that a minimal scissor comb width has been set and a measured value of a side window area is nevertheless above the measured value of the middle area. In this case the bandwidth of the thread group is set too large, i.e. not warp beam-wide. Measures then have to be taken in order to achieve a corresponding adaptation, for which purpose the winding process is interrupted. In such a case, the evaluation unit causes a corresponding display after the automatic system has been stopped. The winding process or the system is also switched off and an indication is given when the oscillation is at a maximum or when the maximum scissor comb width has been set and at least one measured value of a side window area is below the measured value of the middle area. In this case, too, it is no longer possible to change the control device in the sense of troubleshooting. Rather, the width of the thread sheet 11 must be increased with respect to the distance between the side plates 12.

The sensors 14, 14 'described above continuously scan the winding size and, accordingly, continuous control is also possible. On the other hand, however, it is also possible to interrupt the evaluation, the measurement of the winding thickness at intervals, or to distribute the determination of deviations in the measured values of the side window regions over the thickness of the winding 15 at intervals. In the inter If there are any breaks, the deviations that have been determined can be eliminated by carrying out the measures described above. This method is particularly advantageous in order to reduce the outlay on control equipment. It is necessary to eliminate errors that exceed the automatic control range.

With the three sensors 14, 14 ′ described above, the cylindricity of the winding 15 can be continuously checked and adjusted, so that visual monitoring and manual adjustment of the winding of a warp beam is also eliminated.

Claims

Claims:

1. A method for winding a warp beam (10), in which a thread sheet (11) is wound between the side windows (12) of the warp beam (10) practically warp beam-wide, in which the relative position of the side plates (12) of the warp beam (10) to the thread sheet ( 11) is measured and a corresponding alignment of both takes place, in which relative positions, in particular deviating from the alignment, are corrected during winding by the winding thickness in each case in the vicinity of the side windows (12) and in between with optical sensors (14) is measured, after which the measured values of the side window areas are compared with the measured values from the middle area, and according to which, in the event of deviations of the measured values of the side window areas from those of the middle area, these deviations are taken, characterized in that the threads running onto the warp beam (10) are pressed by a pressure roller-side pressure roller (17), and that a ls optical sensors (14, 14 ') optical distance sensors with a fixed arrangement below the pressure roller (17) can be used.

2. The method according to claim 1, characterized in that a traversing of the warp beam (10), a warping drum or a scissor comb (13) is changed as the measure eliminating the deviations.

3. The method according to claim 1 or 2, characterized in that the scissors comb (13) is set wider or narrower as the measure eliminating the deviations.

4. The method according to claim 1, 2 or 3, characterized in that the warp beam (10) and / or the scissor-type comb (13) is or are set to be parallel to the warp beam as the measure eliminating the deviations.

5. The method according to claim 1, 2, 3 or 4, characterized in that it is automatically terminated if at least one measured value of a side window area lies above the measured value of the central area when the zero and / or minimum scissor bar width changes, or if the maximum scissor bar width and / or maximum traversing is at least one measured value of a side window area below the measured value of the central area.

6. The method according to claim 1, 2, 3, 4 or 5, characterized in that the determination of deviations over the thickness of the winding (15) is carried out at intervals, and that in the interval breaks the deviations removing measures and their reactions take place.

7. Device for winding a warp beam (10) with a thread sheet (11), with a measuring device which detects the relative position of side windows (12) of the warp beam (10) to the thread sheet (11), the measurement results of which relate to the relative position of the side plates ( 12) and the thread assembly (11) influencing adjusting device can be used, with the winding thickness in the vicinity of the side windows (12) detecting optical sensors (14), between which an actual value providing optical winding thickness sensor (14 ') is arranged, and with a difference of Measured values of the evaluation unit determining the winding thickness sensor (14) on the one hand and the winding thickness sensor (14 ') on the other hand, the evaluation results of which can be used by the adjusting device for influencing the relative position of the side windows (12) and the thread sheet (11) during the winding characterized in that the threads running onto the warp beam (10) are pressed by a pressure roller on the thread take-up side lze (17) are pressed, and that below the Pressure roller (17) optical distance sensors are fixed

8. The device according to claim 7, characterized in that the actuating device acts on an axial adjusting device and / or a traversing device of the warp beam (10) and / or a warping drum.

9. The device according to claim 7 or 8, characterized in that the actuating device influences the traversing of a scissor comb (13) and / or its relative position parallel to the warp beam (10) and / or the scissor comb width.

10. Apparatus according to claim 7, 8 or 9, characterized in that measuring beams of all sensors are arranged in the same plane through the longitudinal axis of the warp beam (10).

11. The device according to claim 7,8,9 or 10, characterized in that all sensors (14,14 ') are mounted on a beam (21) parallel to the warp beam.