Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
  • B21C47/24—Transferring coils to or from winding apparatus or to or from operative position therein; Preventing uncoiling during transfer
  • B21C47/245—Devices for the replacement of full reels by empty reels or vice versa, without considerable loss of time

Definitions

• the invention relates to a method for operating a turning reel according to the preamble of claim 1. Furthermore, the invention relates to a corresponding turning reel as a device.
• Such reversible reel are basically known in the prior art, such. B. from Japanese patent application JP 64-5625.
• the reversible reel disclosed there has a rotor on which at least one reel mandrel is mounted with its rotor-side end eccentric to the axis of rotation of the rotor.
• the reversible reel is used to wind tape, in particular metal tape, on one of its reel mandrels.
• the rotor of the reel mandrel is first rotated so that an even empty reel mandrel is positioned in a winding position. In this position, the tape is first wound on the reel mandrel.
• a tensile stress strip tension
• the reel mandrel is rotated from said winding position into a finished winding position.
• the tape is finished to a coil or bundle.
• the coil can then be removed from the finished winding position and transported further.
• the reversible reel typically has two reel mandrels, both of which are fastened opposite the eccentric to the axis of rotation of the rotor on the rotor of the reversible reel, the two reel mandrels can be pivoted alternately between the winding and the finished winding position.
• extremely short fret sequences can be realized. From said Japanese document it is also known to assign a traveling mandrel support bearing to the free end of the coiler mandrel, which is coupled in the winding position to the free end of the coiler mandrel and during the transfer of the coiler mandrel from the winding position into Finished winding position remains coupled at this free end.
• the term “traveling mandrel support bearing” can be explained, it moves along during the transfer.
• the reel mandrel typically already has a very high weight. Therefore, even if it is not wrapped with a metal band, its free end typically hangs down or down from its rotor-side end by 1 to 2 mm. This one-sided deformation increases under load due to tape tension and the increase in the coil weight
• the traveling mandrel support bearing known from said Japanese patent application does not appear to be suitable for overcoming these known disadvantages, because it does not primarily support the free end of the reel mandrel against gravity, but obviously primarily against the strip tension.
• this is shown by the fact that the two-part bearing head of the traveling mandrel support bearing does not grip and stabilize the wrapped mandrel in a vertical, but primarily in a horizontal direction.
• the invention is based on the object of developing a known method for operating a turning reel and a known turning reel such that the deflection or the hanging down of the free end of the reel mandrel is avoided, in particular at the start of the winding process.
• this object is achieved by the method claimed in claim 1.
• This is characterized in that the free end of the reel mandrel is raised in the winding position with the help of the releasably coupled traveling mandrel support bearing against the force of gravity to the level of its rotor-side end.
• the claimed lifting of the free end of the reel mandrel compensates for its lowering or hanging down and thus avoids all of the disadvantages mentioned above. In concrete terms, this can prevent the formation of bags when winding up the metal strip. Furthermore, the rapid build-up of strip tension that is possible thereby ensures that the individual windings of the strip of the coil lie close together.
• the tape tension in the winding position can have increased values compared to an unsupported end of the mandrel.
• the free end of the reel mandrel is raised in the winding position before and / or during the winding of the strip. If the free end is raised before the tape begins to be wound, the formation of bags can already be prevented when the tape is being wound. Basically, the earlier the lifting, the better the winding result. The less scrap is produced by the winding process.
• the free end of the coiler mandrel is also kept permanently at the variable height of its rotor-side end during the transfer of the coiler mandrel from the winding position into a finished winding position - also taking into account the increasing coil weight - with the aid of the coupled moving mandrel support bearing. As a result, even during the continued winding process during the transfer of the reel mandrel, a flush winding of the strip with coils lying close together is ensured
• the reel mandrel and in particular its free end is also subject to at least one force component in the horizontal direction due to the said strip tension, to which the strip is subjected during winding.
• the free end of the reel mandrel is also bent in the horizontal direction.
• Such a bending in the horizontal direction is also undesirable because it also leads to the said errors when winding the strip onto the reel mandrel.
• the present invention advantageously provides that the free end of the reel mandrel already in the winding position and also during the transfer of the winding mandrel from the winding position to the finished winding position - also taking into account the strip tension that is growing and changing in its direction and amount With the help of the moving mandrel support, it is also permanently opposite its end on the rotor side is held.
• This expression "opposite to its rotor-side end” means that the free end of the reel mandrel is not only at the level of the rotor-side end, but also that the reel mandrel is not bent in the horizontal plane. This is ensured according to the invention in that the traveling mandrel support bearing is designed not only to counteract gravity and to correct the height of the free end of the reel mandrel, but also to counteract the strip tension.
• Calculation unit provided. This continuously calculates the support position corresponding to the current position of the free end of the reel mandrel, which is to be assumed by the traveling mandrel support bearing, from the variable parameters of weight force, belt tension, current position of the dome and turning process. The changing
• Load parameters weight and tape tension a resulting force and thus a changing measure of the offset of the free end of the reel mandrel to the fixed end of the reel mandrel determined. This ensures that the movement carried out by the adjusting device is carried out both synchronously with the position of the dome during a turning process, and that the variable loading parameters are taken into account and the free end of the reel mandrel is thus always raised to the level of its rotor-side end.
• the synchronization can be carried out by electrical and / or mechanical components.
• the reel mandrel is additionally supported in the finished winding position with the coil typically wound thereon with a stationary mandrel support bearing. Only after the stationary mandrel support has developed its support effect can the traveling mandrel support be uncoupled and moved back to the winding position. In the finished winding position - supported by the stationary mandrel support bearing - the coil can be be wrapped. The finished wound coil can then be removed, typically with a coil transport trolley.
• the above-mentioned object is achieved by the reversing reel claimed in claim 7.
• the traveling mandrel support bearing is supported on the floor, preferably a workshop, and that the adjusting device is designed to raise the bearing head together with the coupled free end of the reel mandrel against gravity until the free end of the reel mandrel rises to the level from the rotor side end of the reel mandrel when the reel mandrel is in the winding position.
• Figure 1 shows the reversible reel according to the invention in a winding position
• Figure 2 shows the reversible reel according to the invention in a finished winding position
• Figure 3 shows the bearing head at the free end of the traveling
• Figure 5 shows the change in acting on the traveling mandrel support bearing
• FIG. 1 shows the reversible reel 100 according to the invention. It essentially consists of a rotor 110, i. H. here, for example, a rotating disk, on which here two mandrel 112 are mounted with their rotor-side end eccentric to the axis of rotation D of the rotor.
• the two flake mandrels 112 generally extend perpendicular to the plane of the rotor. Each of the two flake mandrels is used to wind tape 200, in particular metal tape, into a coil.
• the mandrel 112 shown on the left in FIG. 1 is in the so-called winding position A, while the second mandrel 112 is in the so-called finished winding position F.
• the functioning of the turning reel and the method according to the invention are described below.
• the mandrel support bearing 120 is associated with the mandrel 112 in the working position A.
• This mandrel support bearing 120 has a bearing head 122 which is detachably coupled to the free end of the mandrel 112.
• the free end of the mandrel is that which is opposite the rotor-side end of the mandrel with which it is mounted on the rotor 110.
• the traveling mandrel support bearing 120 is parked and supported on the floor 300 by, for example, a workshop or on a foundation.
• it has an adjusting device 124, for example in the form of a double parallel crank mechanism, for moving the bearing head 122 of the support bearing on a path predetermined by the construction of the adjusting device, especially a circular path.
• This circular path is marked in Figure 1 with an arrow to the right;
• the left reel mandrel can be moved from the winding position A by rotating the rotor 110 about its axis of rotation D and simultaneously moving the mandrel support bearing by suitable movement of the adjusting device 124 into the finished winding position F.
• FIG. 2 This situation is shown in Figure 2. It can also be seen there that the reel mandrel 112 in the finished winding position F is initially supported not only by the traveling mandrel support bearing 120, but also initially by a stationary mandrel support bearing 130. In this finished winding position F, the stationary mandrel support bearing not only has to support the coiled mandrel, but also the finished wound coil. It can be seen in FIG. 2 that the stationary mandrel support bearing 130 is positioned and designed such that, in order to support the free end of the coiler mandrel 112, it can engage with the coiler mandrel further inside than the bearing head 122 of the traveling mandrel support bearing.
• “further inside” means “closer to the rotor 110”, but still at the free end of the reel mandrel.
• This arrangement and positioning of the stationary mandrel support bearing 130 with respect to the traveling mandrel support bearing 120 is important in order to enable the bearing head 122 to be uncoupled from the free end of the reel mandrel 112 in the finished winding position. Due to the fact that the stationary mandrel support bearing 130 is located further inside at the free end of the reel mandrel 112, the area in front of the bearing head 122 is free, so that this can be easily released for uncoupling the traveling mandrel support bearing without problematic interfering edges.
• FIG. 3 shows an exemplary embodiment for the bearing head 122 of the traveling mandrel support bearing 120. It can be seen that this bearing head 122 is sleeve-shaped at its end facing the reel mandrel 112. In or on this sleeve-shaped end, a sliding sleeve 128 is axially displaceable in the direction of the double arrow. To couple the bearing head 122 to the free end 113 of the reel mandrel 112, the sliding sleeve is on the cantilever End 113a of the free end of the reel dome pushed and in this position with an actuator 129, z. B. a cylinder locked.
• the actuating element 129 may also serve to pull back the sliding sleeve and thus to release the free end of the reel mandrel from the bearing head 122 or from the traveling mandrel support bearing.
• the free end 113 of the reel mandrel 112 is rotatably supported within the sliding sleeve 128 or within the sleeve-shaped end of the bearing head 122.
• the design of the sleeve-shaped end ensures that the free end 113 of the reel mandrel can be supported against the gravitational force G by the traveling mandrel support bearing at any point on the path curve mentioned above with reference to FIG.
• the method first provides that the rotor 110 of the turning reel 100 is rotated in order to move the initially empty reel mandrel 112 into the winding position A; see Figure 1.
• the bearing head 122 of the traveling mandrel support bearing 120 is then releasably attached to the free end of the
• Haspeldorns 112 coupled. This state is also illustrated in Figure 4.2.
• FIG. 4.1 The front side of the reel mandrel 112 can be seen in the winding position A in a schematic representation.
• the dash-dotted small circle shows that the rotor-side end of the reel mandrel fixedly mounted on the rotor 110, while the small circle drawn with a solid line shows the free end of the reel mandrel.
• the offset between the two small circles shown in an exaggerated representation means the hanging down or the lowering of the free end of the reel mandrel 112 relative to its end on the rotor side, the sagging, for example, of approximately 1 to 3 mm being able to take place solely due to the high weight of the coiler mandrel 112. This sagging of the free end of the reel mandrel leads to improperly wound coils as described in the introduction.
• this sagging of the free end 113 of the reel mandrel 112 is therefore counteracted in that this free end 113 is raised to the height of the rotor-side end of the reel mandrel 112 with the aid of the coupled traveling mandrel support bearing against gravity G.
• Figure 4.2 shows the free end 1 13 of the reel mandrel 112 in the raised position; this can be seen from the fact that the rotor-side and the free end of the reel mandrel 112 are drawn congruently in FIG. 4.2.
• the tape is started to be wound onto the reel mandrel 112. Initially, this is done entirely without tape tension; the strip tension is only built up when the strip, in particular the metal strip with a few windings (usually 1-5 windings) is wound on the reel mandrel 112 and can withstand an effective tension or an effective strip tension.
• the free end 113 of the reel mandrel 112 is preferably raised to the height of the rotor-side end in the winding position A before and / or during the winding of the strip. If possible, the free end of the reel mandrel should be raised to the height of the rotor-side end before the start of winding, because the problems described above, when winding the strip, can then be avoided from the start of winding.
• Figure 4.3 shows the structure of the tape tension in the winding position A; the structure of the belt tension is indicated there by the two arrows pointing parallel to the belt 200.
• the double parallel crank mechanism 124 of the traveling mandrel support bearing holds its bearing head and thus also the free end 113 of the reel mandrel 112 in the winding position at the level of the end on the rotor side.
• FIG. 4.4 shows the reel mandrel 112 with the tape 200 partially wound up under tape tension when it is transferred from the winding position A to the finished winding position.
• the adjusting device 124 here in the form of the double crank gear, for example, always holds the free end 113 of the coiler mandrel 112 at the level of the rotor-side end of the coiler mandrel.
• the adjusting device 124 also counteracts the strip tension at the free end of the coiler mandrel, so that there is also no lateral offset between the two ends of the coiler mandrel 112.
• FIG. 4.5 shows the coiler mandrel 112 with the coil diameter that has grown in the meantime in the finished winding position F.
• the adjusting device 124 is suitably rotated accordingly.
• FIG. 4.6 shows the coiler mandrel 112 in the finished winding position F, where the free end 113 of the coiler mandrel 112 is now also supported by the static or stationary mandrel support bearing 130.
• the stationary mandrel support bearing 130 alone supports the free end of the reel mandrel, so that the traveling mandrel support bearing is uncoupled from the free end, for example by pulling back the sliding sleeve 128 can be.
• the uncoupled traveling mandrel support bearing can then be moved back into the winding position, as shown in Figure 4.7.
• the coil can be completely wound and later removed from the reel mandrel without having any interfering edges with the mandrel support bearing.
• FIG. 5 again shows the different stations of the reel mandrel already known from FIGS. 4.1-4.7 during its transfer from the winding position A to the finished winding position F.
• the acting forces indicated in FIGS. 4.1-4.7 can be seen particularly clearly in FIG.
• the total force acting on the coiler mandrel 112 or the resulting force FRES results in each case as a vectorial sum of the weight force FG and the tensile force Fz due to the strip tension. It can be seen that the weight force FG, which always acts in the vertical direction, is still relatively small in the winding position A and becomes ever greater towards the finished winding position.
• the traveling mandrel support bearing 120 according to the invention must in particular be designed to counteract the resulting total forces FRES.
• the traveling mandrel support bearing 120 is supported on the floor according to the invention in order to derive the forces into the floor.
• the calculation of the total forces and the current turning position is carried out by a calculation unit (not shown), which specifies the supporting position to be assumed for the traveling mandrel support bearing and can be carried out by the adjusting device.
• FIG. 6 again shows the positions of the flake mandrel that have already been partially described with reference to FIGS. 4.1-4.7 during its transfer from the winding position into the finished winding position.
• FIG. 6 shows in particular various options for placing drives 126 in the articulation points of the double crank gear 124.
• the drives are each symbolized by a sector-like division of the articulation points. Basically, it is sufficient to provide only one drive in one articulation point, as is shown by way of example and alternative for two articulation points in the second column in FIG. 1. It is better, but also more expensive, to install two drives 126 in different articulation points of the double crank gear 124, as shown in the third column in FIG. 6.
• the drives 126 rotate in the same direction.
• the mandrel 112 is still before the dead center.
• the torques applied by the two drives 126 add up.
• the mandrel 112 is located beyond the dead center; the torques applied by the two drives 126 act individually and in the opposite direction of rotation.
• the method and the device according to the invention advantageously advantageously significantly increase the flexibility of the winding process.
• the number of possible turns in the winding position and the permissible tape tension values in the winding position can be increased; the speed during the turning process can be changed. This means that the winding process can be carried out much more flexibly in terms of process technology.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Winding Of Webs (AREA)
• Winding, Rewinding, Material Storage Devices (AREA)

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• 2018
  • 2018-08-02 DE DE102018212958.4A patent/DE102018212958A1/de not_active Withdrawn
• 2019
  • 2019-08-01 JP JP2021505660A patent/JP7168761B2/ja active Active
  • 2019-08-01 EP EP19749707.6A patent/EP3829791B1/de not_active Not-in-force
  • 2019-08-01 WO PCT/EP2019/070829 patent/WO2020025773A1/de not_active Ceased
  • 2019-08-01 CN CN201980051392.5A patent/CN112512713B/zh active Active

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