EP0438674A2 - Method of simultaneously coiling several slit metal strips - Google Patents

Abstract

In a method of simultaneously coiling several slit strips formed by longitudinal cutting of a wide metal strip and separated from one another, on a common coiling mandrel of expandable diameter, the leading ends of the strips of all the slit strips to be simultaneously coiled are first fixed at predetermined mutual axis intervals on the coiling mandrel. By rotating the latter, the slit strips are then wound onto the expanded coiling mandrel under tension in more than one initial turn and at least two radially superposed initial turns of the respective slit strip are connected to one another in a manner resistant to tangential shear (resistant to shear in the circumferential direction) in order thereby to form a self-contained sleeve from the initial turns of each slit strip. The connection between the leading ends of the strips and the coiling mandrel is then released and the slit strips are then wound onto their associated sleeves while maintaining the expansion of the coiling mandrel and hence the frictional contact between the latter and the initially formed sleeves. During this process, the torque is transmitted with limited slip from the coiling mandrel to the sleeves by friction between the inner circumferences of the latter and the radially expandable parts of the coiling mandrel, and the back tension is produced in all the slit strips to be simultaneously coiled by a braked uncoiler for the undivided metal strip and/or a longitudinal dividing shear.

Description

The invention relates to a method for the simultaneous winding of a plurality of split strips (strips) formed by longitudinally dividing a wide metal strip (broadband), in which a separate sleeve is arranged for each split strip on a common, expandable mandrel and the respective split strip the associated sleeve is wound up, the torque being transmitted from the winding mandrel to the sleeves by friction between their inner circumferences and radially expandable parts of the winding mandrel with generation of limited slipping and the retraction in all split strips to be wound up simultaneously by a braked decoiler for the undivided metal strip and / or a slitting shear is generated.

When slitting (splitting) a wider metal strip, also called broadband, several narrow strips or strips are created, which according to EURONORM 131-77 are referred to as "longitudinally divided broadband" or in many cases also as "split band". These narrower metal strips or strips created by the longitudinal division of a broadband are referred to below as split strips. These slit strips serve as the starting material for sheet metal part production and their width depends on the dimensions of the sheet metal part to be produced therefrom. After they have left the slitting shear, the individual slit strips must be wound up again exactly, ie straight and tightly, to form individual, stable slit strips or rolls. Uniformly wound coil strips are necessary for packaging, transport and further processing.

Although the individual slit strips to be wound come from one and the same broad band, difficulties arise when they are wound on a common winding mandrel. Cold-rolled (quality) broadband also has permissible thickness deviations across the band width, which for nominal thicknesses between 0.1 and 2 mm can be of the order of magnitude between ± 0.01 and ± 0.04 mm. In most cases, the edge areas of the broadband are thinner than the central area. In addition, residual stresses are released when slitting to the extent that they are in the elastic range. As a result, the split strips split off at the edge of a broadband usually also have a greater length than the split strips formed from the center of the strip. The strip thickness tolerances result in different winding diameters and corresponding train and speed differences between the individual slit strips when winding on a common winding mandrel. This would have the consequence that the bundles wound from the split strips lying at the edge are looser than the bundles lying in the middle. In addition, different slit lengths are wound up on the individual slit strips due to the different outer diameter. In order to compensate for this, the majority of the slitting lines are equipped with a loop pit between the slitting shear and the winding mandrel. These loop pits can be twelve or more meters deep so that slit strips with excess length do not touch the pit floor. Such deep loop pits require considerable construction effort. In addition, a braking device is also required between the sling pit and the winding mandrel, which is relatively complicated in construction, since each individual slit band must be braked with the same retraction without damaging the surfaces and edges of the slit band. The elaborate braking device and the deep sling pits not only cause considerable costs, but they also increase the length of the entire slitting line, which in turn creates costs due to the additional length of the hall. In addition, the more or less sensitive belt surfaces in the braking device for generating the retraction are touched rolling or rubbing in almost all cases, which often leads to surface damage. The threading of the individual slit strips into the braking device requires longer threading times, and excess lengths at the end of the winding process must either be cut off and scrapped or wound up in a cumbersome manner.

Another solution to the problem could be that each slit band is wound on its own winding mandrel and the specific band tension is regulated by the speed of the winding mandrel. This concept is ruled out for cost reasons and because of the associated length for split systems with several split strips and a large program range and is only carried out in special systems with fixed split bandwidths.

It has also already been proposed to solve the problem described above by the method mentioned at the beginning (see magazine "Bänder Bleche Rohr" 10/1982, page 279, Figure 9). In this method, several prefabricated sleeves are arranged on the common winding mandrel, the width of which corresponds to the width of the slit strips to be wound up. The individual tubes are entrained by friction between expandable parts of the winding mandrel and their inner surfaces. They act as a slip clutch between the split collar wound on the respective sleeve and the driven mandrel. This will side by side in all coiled slit strips produced approximately the same specific strip tension. Since the individual sleeves can slide in rotation on the winding mandrel, they can also have different speeds and the individual slit strips always remain under tension despite different collar diameters and different strip lengths. The disadvantageous loop pit and the complex braking device can thus be dispensed with. However, it is disadvantageous that the sleeves have to be prefabricated, with tight tolerances being observed so that they function properly as a slip clutch and approximately the same torque is transmitted to all sleeves. It is also unclear how the beginning of the tape is attached to the sleeves and how the sleeves can be reused. If a slit band is wound onto the sleeve, this slit band is tightened on the sleeve due to rope friction so that it can only be released from the slit band after it has been completely unwound. However, since the slit band is not rewound after rewinding but is delivered to the processing company, returning the sleeves to the slit band manufacturer should hardly be profitable. Furthermore, a separate sleeve width is required for each slit band width, which increases the cost of manufacturing and storing the sleeves. In addition, the winding mandrel itself is likely to be expensive to manufacture, because it must be usable for the most varied sleeve widths, while at the same time it must be ensured that, despite certain tolerances of these sleeves, approximately identical torques are transmitted from the winding mandrel to the individual sleeves.

The invention is therefore based on the object of a method for the simultaneous winding of a plurality of split strips (strips) formed by longitudinally dividing a wide metal strip (broadband) and separated from one another at the beginning Show mentioned type, in which the prefabrication of separate sleeves is omitted and slit strips of any width can be wound into stable slit strips on a common winding mandrel with a simple structure.

This is achieved according to the invention in that each sleeve is formed by the respective slit strip itself, by first defining the tape starts of all split strips to be wound up at predetermined mutual axial distances on the winding mandrel, that then by rotating the split strips under tension in more than an initial turn is wound onto the spread winding mandrel and at least two radially superimposed initial turns of the respective slit band are connected to each other tangentially shear-resistant (shear-resistant in the circumferential direction) in order to form a self-contained sleeve from the initial turns of each slit band so that the definition between the beginning of the tape and the Winding mandrel is released and then, while maintaining the spread of the winding mandrel and thus the frictional contact between the latter and the initially formed sleeves, the slit strips are wound onto their associated sleeves the.

The invention is therefore based on the idea of forming the sleeves required for winding as part of a slip clutch at the beginning of the winding process by means of the respective slit strip itself. This has the advantage that the separate prefabrication of sleeves is not necessary. Since each sleeve is formed from the associated slit band, its axial width corresponds exactly to the width of the slit band to be wound up. As a result, slit strips of any width can be wound up without any problems. Since also the individual sleeves are formed on the winding mandrel itself under tension, they fit exactly on the winding mandrel, regardless of any tolerances thereof. It is therefore also possible to transmit approximately the same width-specific torques from the winding mandrel to the individual sleeves. It is also an important factor that the individual slit strips are already connected to their associated sleeves after the sleeves have been formed on the winding mandrel, since the individual slit strips are not separated from them after the initial turns have been wound up. As soon as the sleeves are formed from the individual slit strips in the manner described, the winding process can begin immediately. Here, the expandable parts of the winding mandrel are pressed against the inner circumferences of the sleeves with radial force. The sleeves are entrained by friction, but the contact pressure is selected so that the individual sleeves can slide in the circumferential direction independently of one another on the winding mandrel. In this case, an approximately equally large specific torque is transmitted to each sleeve in proportion to its width, which torque also produces an approximately equally large specific band tension in the various split strips. Regardless of thickness tolerances and differences in length of the simultaneously wound slit strips, slit strips bundles which are tightly wound next to one another are formed on the winding mandrel without a loop pit or a braking device being necessary. Since the belt surfaces are not touched by the parts of a braking device, damage to the belt surface by parts of such a braking device is also avoided. The individual sleeves act like slip clutches, but it must be ensured that sufficient torque is transmitted from the winding mandrel or its expandable parts to the individual sleeves by friction to generate the required specific tape tension in the individual split tapes. When through Implementation of the method according to the invention, it is also essential that the initial turns are tangentially connected to one another, which is expediently carried out by welding, e.g. spot welding, roller seam welding, by gluing or by the fact that a double-sided self-adhesive tape is inserted during winding between the initial turns and together with the slit strips is wound up. The tangential shear-resistant connection of the initial turns forms self-contained sleeves which prevent the initial turns of the slit strips from tightening due to rope friction on the winding mandrel.

The beginning of the tape on the winding mandrel is expediently carried out by means of a clamping device provided thereon. Such clamping device are known in winding mandrels and are usually referred to as a clamping slot.

The winding mandrel is expediently driven at a speed which, from the start, results in limited rotating sliding (slipping) between all the sleeves and radially expandable parts of the winding mandrel. In this way, the so-called "slip stick effect" is avoided, which could result from the fact that the static friction between a sleeve rotating synchronously with the winding mandrel is greater than the sliding friction of a sleeve slipping relative to the winding mandrel. The slip stick effect would lead to jerky fluctuations in tension and, due to this, to gradual, lateral belt run.

The radial pressure with which the expandable parts of the winding mandrel are pressed against the inner circumferences of the cores is expediently increased with increasing diameter of the split collars so that the resulting specific strip tension decreases with increasing diameter. An increase in pressure is necessary because with increasing diameter of the slit band bundles, a higher torque is required in order to to generate sufficient tape tension in the individual slit strips. However, if the pressure is increased so that the resulting specific tape tension gradually decreases with increasing coil diameter, then it is ensured that each turn is wound on such a previous, inner turn, which has been wound with a higher specific tape tension. The gradually decreasing tape tension has the result that the turns do not slide on each other in the circumferential direction. This prevents surface damage to the slit strips, which could result from the mutual sliding of the surfaces of adjacent turns.

In another, non-generic device (DE 28 07 614 C2) an operating mode is known in which the beginning of the tape is first placed in a slot of the winding mandrel and clamped. Then the mandrel is rotated at least once, but preferably two to three times, so that at least one, but preferably two or three turns of the slit strips are wound on the winding mandrel. Then the clamping between the beginning of the tape and the winding mandrel is released. When the winding mandrel continues to rotate, the beginning of the tape is pulled out of the slot of the winding mandrel by the retraction of the decoiler. The winding mandrel then turns within the initially formed turns of the slit strips. Then the brake of the decoiler is slowly released and the speed of rotation of the winding mandrel is increased. Sufficient friction then arises between the outer surface of the winding mandrel and the innermost turn of the slit strips so that the individual slit strips are wound up. The retraction is also generated by the decoiler during winding. In addition, the diameter of the winding mandrel can be changed in order to achieve a controlled relative movement between the winding mandrel and the strips wound thereon. Furthermore, during the A separation between adjacent windings can be ensured by a rotatable adjusting member. This rotatable adjusting element is supported on the outside of the windings and engages with separating elements in the form of disks which extend from the outside between the windings, thereby preventing contact of adjacent slit strip windings. However, since in this known mode of operation the initial turns of the respective slit band are not fixed against each other, there is a risk that the initial turns of some of the slit bands will tighten due to so-called rope friction on the winding mandrel, thereby preventing the slit band winding from slipping relative to the winding mandrel. This in turn has the consequence that the individual slit band windings are wound up with different strengths and also also individual slit bands, of such windings which still slide on the surface of the winding mandrel, sag between the cutting device and the winding mandrel. One cannot prevent the tightening of individual coils by reducing the winding mandrel stepwise or continuously in diameter, because this would in turn mean that those coils that have not yet tightened on the winding mandrel get less or no more of the winding mandrel be rotated.

Further advantageous embodiments of the method are characterized in the remaining subclaims.

Figur 1

eine schematische Seitenansicht einer solchen Längsteilanlage,

Figur 2

einen Querschnitt des Wickeldornes vor Beginn des Aufwickelns der Anfangswindungen,

Figur 3

einen Querschnitt zu Beginn des Aufbringens eines doppelseitig selbstklebenden Bandes,

Figur 4

einen Querschnitt nachdem die Anfangswindungen tangentialschubfest miteinander verbunden und damit die Hülsen gebildet sind,

Figur 5

einen Längsschnitt des Wickeldornes gemäß Linie V - V der Figur 2,

Figur 6

eine zwischen die Spaltbandbunde eingreifende Führungseinrichtung in Seitenansicht,

Figur 7

eine Einrichtung zur Erzeugung einer Längssicke im Spaltband im Schnitt.

The invention is explained in more detail below with reference to a slitting unit shown in the drawing which is particularly suitable for carrying out the method. Show it:

Figure 1

2 shows a schematic side view of such a slitting line,

Figure 2

a cross section of the winding mandrel before the start of the winding of the initial turns,

Figure 3

a cross section at the beginning of the application of a double-sided self-adhesive tape,

Figure 4

a cross-section after the initial turns tangentially shear connected to each other and thus the sleeves are formed,

Figure 5

2 shows a longitudinal section of the winding mandrel according to line V-V of FIG. 2,

Figure 6

a side view of a guiding device engaging between the slit band bundles,

Figure 7

a device for generating a longitudinal bead in the slit in section.

According to Figure 1, the slitting line has a braked decoiler 1, a driving and coarse straightening machine 2, an infeed stand with belt side guides and subsequent calming roller group 3, a circular slitting shear 4, a burr rolling stand 5, a push-in device 6 with a separating shaft 7 and one Deflection roller 8, and a take-up reel 9 with a take-up mandrel 10. Other devices customary in slitting lines are not shown in the drawing, since they are meaningless in connection with the invention.

The metal strip M drawn from the decelerated decoiler 1 by the driving and rough straightening machine 2 is first smoothed in the rough straightening machine. The circular slitting shear 4 then divides the band M into several slit bands S, which initially run close together. In the burr rolling stand 5, the burrs that previously occasionally occurred at the edges of the slit strips during the slitting are flattened. The push-in device 6 can be moved between the burr rolling stand 5 and the take-up reel 9. Before the start of winding, the push-in device is approached to the burr rolling stand and takes over the beginning of the strip (strip heads) of the individual slit strips S.

According to FIG. 2, the push-in device 6 has a push-in table 12 which can be pivoted about the axis 11 and a pivotable clamping jaw 13. The tape starts A of the slit strips S are driven into the insertion device 6 until the tape starts A protrude sufficiently beyond the insertion table 12 for the later insertion process. Then the split strips S are spread laterally by hand when the burr stand 5 is open, brought to a distance of about 3-5 mm in the auxiliary separating device 14 and clamped on the insertion table 12 by the clamping jaws 13. The ridge rolling stand 5 is then closed again, and the entire push-in device 6 is moved in the direction of the take-up reel 9 until the tape starts A in the open clamping slot of the clamping device 23 of the take-up mandrel 10 (FIG. 2).

The separating shaft 15 has separating disks 15a which engage in the gap between the individual slit strips S. The separating shaft takes over the guiding of the slit strips afterwards. The push-in device 6 also has a deflection roller 16.

The winding mandrel 10 has a rotationally drivable mandrel body 17, which is surrounded by four reel segments 18. The reel segments 18 are guided by means of the guide rods 19 in a radially displaceable manner relative to the winding mandrel body 17. For the radial adjustment of the reel segments 18, a plurality of axially displaceable inner expansion wedge strips 20 are provided, on which the radially displaceable outer expansion wedge strips 21 are supported. These in turn act on the reel segments 18 via wedge surfaces. A central piston rod 22 serves to drive the inner expanding wedge strips 20.

In order to hold all parts of the winding mandrel 10 together in a form-fitting manner, tension springs, which are not shown, are located between the reel segments 18 and the winding mandrel body 17.

Furthermore, a clamping device 23 is provided in the winding mandrel 10 for the beginning of the tape A. This clamping device 23 has a clamping jaw 23a which can be actuated independently of the spreading state of the reel segments 18.

After the beginning of the tape A has been brought (pushed) into the opened clamping slot of the clamping device 23 by the push-in device 6, as shown in FIG. 2 is, the clamping jaws 23a is closed by actuating the clamping wedge strip 23b, which means that the beginning of the tape A on the winding mandrel 10 has been positioned correctly. The clamping between the insertion table 12 and the jaws 13 is then released. The separating shaft 15 is raised after the clamping has been released, so that the separating disks 15a engage between the individual slit strips S. By moving the piston rod 22 according to FIG. 5 in direction B, the reel segments 18 are brought into their radially outer spreading position by means of the expansion wedge strips 20, 21. Then the clamping jaw 13 of the insertion device is pivoted upwards and the insertion table 12 is folded downwards. The entire push-in device, or a part of the deflecting roller 16 carrying the same, is then lowered so far that the axis of the deflecting roller 16 lies below the axis of the winding mandrel, as shown in FIG. When lowering the push-in device 6, the slit strips S have to be conveyed out of the system with a slight pull, since the clamping device 23 alone is not able to pull the slitting shear 4 or the remaining parts of the slitting device. This is only possible after at least one turn on the winding mandrel 10, since a rope friction has then built up.

After the tape starts A on the winding mandrel 10 are fixed in this way and the push-in device 6 is lowered in the manner described, the winding mandrel 10 is driven clockwise in the case shown in FIGS. 2 and 3 and the slit strips are wound onto the reel segments 18 under tension. During the first turn and possibly also one or more turns, an adhesive tape roll 24 is pressed radially from the outside against the first turn of the slit strips. This results in a full Pressing the double-sided self-adhesive tape 24a against the split tapes, which pull the tape 24a off the adhesive tape roll 24 as the winding mandrel continues to rotate. During this peeling off, a protective film covering the double-sided self-adhesive tape 24a is removed by means not shown. After approximately one revolution of the winding mandrel, the adhesive tape 24a is cut off in the direction of the winding mandrel axis. The double-sided self-adhesive tape 24a hereby connects the two initial turns of each split tape so that they are tangentially shear-proof, so that a self-contained sleeve is formed by the initial turns of each split tape. After this has been done, the clamping jaws 23a are first opened, so that the fixing of the slit band starts A on the winding mandrel is canceled. As the winding mandrel rotates further, the slit band starts A are pulled out of the clamping slot, as shown in FIG. 4. However, the clamping jaws 23a are then closed again, so that the associated reel segment in the region of the clamping jaw is also supported radially from the inside and so that the peripheral surface of the winding mandrel is centrically round and closed. Figure 4 shows the state after formation of the sleeves immediately before the start of the actual winding process, that is, before the slitting unit is run up to operating speed.

The tangential shear resistant connection of the initial turns can also be done in other ways. For example, while the initial windings were being wound up, a quick-curing adhesive could be applied to the initial windings, which, after curing, connects the initial windings with each other in a tangential-shear manner. The adhesive can be applied by means of narrow transfer rollers, which would be attached in a manner similar to that shown in FIG. 3 with respect to the adhesive tape roll 24. Due to the narrow transfer rollers, the width of which is smaller than the gap width, it can be achieved that no adhesive gets into the gap between the individual gap bands, and with it the surface keep the winding mandrel free of adhesive. A further, even simpler method for applying the adhesive would be the use of nozzles which can expediently be adjusted to the gap bandwidth and which are brought into close proximity with the gap strips for one or more turns. It would be expedient to use two successive nozzles and a two-component adhesive in order to avoid sticking of the nozzles. The curing component would then be applied from the second nozzle.

As indicated above, the tangential shear-resistant connection of the initial turns can also be carried out by welding, for example spot welding, or roller seam welding.

In order to guide the slit strips, in particular narrow slit strips, during winding and to ensure winding with precise edges, as shown in FIGS. 5 and 6, a plurality of essentially fork-shaped, stationary cutting disks are provided, which are located between the individual split strips in radial planes as far as Extend the vicinity of the mandrel circumference and enclose this semicircular. After the winding-up process has ended, these are moved radially outward from the split band bundles by means of cutting discs held by a common support axis 26.

It is particularly important that the sleeves and the first turns of the slit strips are correctly guided. Instead of the cutting disks 25, one could also, as shown in FIG. 5, below, place spacer rings 27 of, for example, 3 mm axial width and 5 mm radial height on the reel segments 18 of the winding mandrel between the individual split strips. So that these rings can follow the spreading movement of the reel segments 18, they each have a cross slot and are spreadable in this way. These spacer rings 27 guide the sleeves and the slit strips during the first turns. They have the advantage that they rotate together with the winding mandrel and do not grind on its surface.

As already mentioned above, the winding mandrel must be driven at a speed after formation of the sleeves, which from the start has a limited, rotating sliding (slipping) between all sleeves and the radially expandable reel segments 18 of the winding mandrel 10. The friction occurring between the sleeves and the reel segments would result in some wear on the surface of the reel segments. The surface of the reel segments should therefore be treated and / or coated in an appropriate manner to reduce wear. It is also conceivable to equip the reel segments with exchangeable wear strips or the like.

In order to correctly guide the initial windings of the slit strips S forming the sleeves on the winding mandrel 10, it is also possible to provide the surface of the winding mandrel 10 with a large number of annular grooves arranged at an axial distance from one another. Such an annular groove 28 in the winding mandrel 10 is shown in FIG. 7. By means of a plurality of profiling rollers 29, which are pressed hydraulically against the winding mandrel 10 during the winding of the first initial turn, at least one longitudinal bead 30, preferably V-shaped in cross section, is rolled into each slit strip S. The profiling roller 29 engages in the annular groove 28 of the winding mandrel 10 during this cold profiling process with the interposition of the respective slit strip S. After at least one such longitudinal bead has been rolled into each initial turn, the profiling rollers 29 are removed from the winding mandrel 10 and a second, smooth turn is wound onto and with the first initial turn to form a sleeve connected tangentially by one of the methods described above. The longitudinal bead, which also engages in the annular groove 28 after removal of the profiling rollers 29, prevents the sleeve from migrating in the axial direction on the winding mandrel 10 during further winding. In addition, the sleeve is stiffened by the longitudinal bead 30.

The profiling rollers 28 can be arranged on a shaft in a manner fixed against relative rotation, but axially adjustable, so that they can be adjusted for all occurring widths of split strips S in such a way that at least one complete longitudinal bead can be rolled into each split strip. For this purpose, a larger number of ring grooves must be provided in the winding mandrel.

Claims (14)

Process for the simultaneous winding up of a plurality of split strips (strips) formed by longitudinally dividing a wide metal strip (broadband), in which a separate sleeve is arranged for each split strip on a common, expandable mandrel and the respective split strip is wound onto the associated sleeve, wherein the torque is transmitted from the winding mandrel to the sleeves by friction between their inner circumferences and radially expandable parts of the winding mandrel to produce a limited slipping and the retraction is generated in all split strips to be wound up simultaneously by a braked decoiler for the undivided metal strip and / or a slitting shear, characterized in that each sleeve is formed by the respective slit strip itself, by first starting the strip of all split strips to be wound up at predetermined mutual axial distances on the take-up Eldorn be determined that then by rotating the split strips under tension in more than one initial winding wound on the spread winding mandrel and at least two radially superimposed initial windings of the respective split band tangentially shear resistant (shear resistant in the circumferential direction) connected to each other so that one of the initial turns of each split band to form a self-contained sleeve, that the fixing between the beginning of the tape and the winding mandrel is then released and then, while maintaining the spread of the winding mandrel and thus the frictional contact between this and the initially formed sleeves, the slit strips are wound onto their associated sleeves. A method according to claim 1, characterized in that the beginning of the tape on the winding mandrel is determined by means of a clamping device provided thereon. A method according to claim 1 or 2, characterized in that the tangential shear-resistant connection between the superimposed initial turns is made by a double-sided self-adhesive tape which is inserted between the initial turns during winding and wound up together with the split tapes. A method according to claim 1 or 2, characterized in that the superimposed initial turns are connected tangentially by a fast-curing adhesive which is applied to the slit strips during the winding of the initial turns. Method according to claim 4, characterized in that the adhesive is applied by means of narrow transfer rollers, the width of which is smaller than the gap width. A method according to claim 4, characterized in that the adhesive is applied by means of nozzles. Method according to claim 6, characterized in that nozzles are used, the width of which can be adjusted to the gap bandwidth. Method according to claim 6 or 7, characterized in that a two-component adhesive is used, the two components of which are applied separately from one another by two immediately successive nozzles. Method according to claim 1 or 2, characterized in that the superimposed initial turns are connected to one another by welding in a tangential-shear manner. Method according to one of the preceding claims, characterized in that the winding mandrel is driven at a speed which, from the start, results in limited, rotating sliding (slipping) between all the sleeves and radially expandable parts of the winding mandrel. Method according to at least one of the preceding claims, characterized in that the radial pressure with which the expandable parts of the winding mandrel are pressed against the inner circumferences of the sleeves is increased with increasing diameter of the split band bundles so that the resulting specific band tension decreases with increasing diameter. Method according to at least one of the preceding claims, characterized in that the individual slit strips are guided at the beginning of the winding by spacer rings which are arranged in the radial direction and are spreadable in the radial direction between the slit strips on the winding mandrel. Method according to at least one of the preceding claims, characterized in that the individual slit band bundles are passed through substantially fork-shaped, stationary cutting disks during the winding, which extend in radial planes up to the vicinity of the circumference of the mandrel and surround it in a semicircular shape. Method according to at least one of the preceding claims, characterized in that, during the winding of the first initial turn, at least one longitudinal bead, which is preferably V-shaped in cross section, is rolled into each split band by means of a profiling roller and engages with a correspondingly profiled, assigned annular groove in the surface of the winding mandrel is brought by each profiling roller engages in the associated annular groove with the interposition of the respective slit strip.

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