Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, 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
  • B21C47/02—Winding-up or coiling
  • B21C47/08—Winding-up or coiling without making use of a reel or drum, the first turn being formed by a stationary guide
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, 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
  • B21C47/16—Unwinding or uncoiling
  • B21C47/22—Unwinding coils without reels or drums

Definitions

• the invention relates to a coil box for winding a metal strip into a coil and for unwinding the metal strip from the coil.
• coil means in particular a coiled metal strip.
• the invention also relates to a system consisting of the coil box according to the invention and a coil processed therein. Finally, the invention relates to a method for operating the coil box.
• Coil boxes are known in principle in the prior art. They typically consist of a winding station and an unwinding station downstream of the winding station in the direction of material flow.
• the winding station and the unwinding station each consist of a plurality of adjustable rollers.
• the coil that has been completely wound in the winding station must be transferred to the downstream unwinding station.
• Two basic solutions are known in the prior art for this transfer of the coil, namely active coil transfer and passive coil transfer.
• active coil transfer For the realization of the active coil transfer, additional hydraulic actuators are typically required in the area between the winding station and the unwinding station, which are not only expensive but also require additional space between the winding station and the unwinding station. In addition, there is considerable effort for commissioning, because the movements of the actuators for smooth coil transport must be very precisely coordinated with the rolls of the upstream winding station and the subsequent unwinding station. The investment in plant technology is therefore very high with active coil transfer. Examples of active coil transfer are described in European patent specifications EP 2 257 395 B1 and EP 2 616 196 B2. The advantage of active coil transfer is that the Whereabouts or the position of the coil within the coil box and in particular during the transfer from the winding station to the unwinding station is always clearly defined.
• the coil stops unwinding when its rotation stops.
• the passive coil transfer will always start from a calculable ring weight.
• the coil is not pulled completely onto the unwinding station, but remains temporarily between the rolls of the winding station and the rolls of the unwinding station. This occurs to a greater extent with soft material, ie at high temperatures and with small thicknesses of the metal strip.
• the position of the coil cannot always be precisely determined with passive coil transfer; ie in particular it remains unclear whether the coil is still between the two stations or is already in the unwinding station.
• a new metal strip to be wound up can only be released for entry into the winding station of the coil box if it is ensured that the winding station of the coil box is completely empty.
• the position of the coil is unclear during passive coil transfer, especially during the transfer of the coil from the winding station to the unwinding station, and the position of the coil can only be clearly determined in the unwinding station, there is a loss of time for the passive coil transfer with regard to determining when the coil has definitely left the winding station. This is accompanied by reduced productivity of the system, because the subsequent metal strip to be wound up can only be released for entry into the winding station of the coil box when the previously wound coil has definitely left the winding station.
• the invention is based on the object of developing a known coil box, a known system consisting of the coil box and a coil, and a known method for operating the coil box such that the position of the coil is known at all times, particularly during its passive transfer from the winding station to the unwinding station and therefore also the point in time when the coil leaves the winding station within the coil box can be definitely determined.
• this object is achieved by the subject matter of claim 1 .
• This object is characterized in that at least one additional roller is provided which is rotatably mounted on the frame, that the axis of rotation of the additional roller is parallel to the axes of rotation of the first to fourth rollers and that the axis of rotation of the additional roller is positioned on the frame in such a way that its radial distance xz to the pivot point of the frame is greater than the radial distance x2 of the pivot point of the second roller to the pivot point of the frame and that its radial distance xz plus the radius of the additional roller is smaller than the minimum radial distance x3 of the pivot point of the third roller to the pivot point of the frame, minus the radius of the third roller and that the uppermost point of the auxiliary roller is located a predetermined distance w below that roller table plane in a first transitional position in which the uppermost points of the first and second rollers form a horizontal table plane.
• the additional role and possibly also the further additional role is at least slightly before that of the idR protected from the thermal radiation emitted by the warm coil. This makes sense, and may even be necessary, because there is no additional strip contact in this phase, which draws additional heat from the rolling stock.
• the additional roll according to the invention offers the advantage that the position of the coil during its transfer from the winding station to the unwinding station and the time when the coil leaves the winding station can be determined better or more precisely. This results in the advantage that the production rate can be increased compared to the classic passive transfer because the winding of the following strip can begin earlier. More detailed explanations are given in the description of the exemplary embodiments.
• the transfer of the coil from the winding station to the unwinding station can advantageously be facilitated by the fact that at least one shifting device is provided for the optional and individual shifting of the third and/or the fourth roll, which form the unwinding station, under the through the first and second role formed in a first transition position roller table plane E1.
• a further additional roller is rotatably mounted on the frame between the second roller and the additional roller. This further additional roller is positioned on the frame in such a way that its outer circumference overhangs an imaginary tangential connecting line—facing the roller table plane E1—between the outer circumferences of the second roller and the additional roller.
• the coil box according to the invention also has a position detector for generating a position indicator that represents the position of the additional roller, in particular when the additional roller is raised to the height of the roller table level formed by the first roller and the second roller in the first transitional situation or higher.
• the position of the additional roller in turn also represents the position of the coil during the coil transfer.
• FIG. 1 shows the coil box according to the invention, consisting of a winding station and an unwinding station in a first transitional position;
• FIG. 2 shows the coil box according to the invention with the winding station in a second transitional position
• FIG. 3 shows the coil box with the winding station in a third transitional position
• FIG. 4 shows the coil box according to the invention with the winding station in a transfer position; and Figures 5-8 correspond to Figures 1 to 4, with the only difference that now a further auxiliary roll is rotatably arranged between the second roll of the winding station and the auxiliary roll.
• Figure 1 shows the coil box 100 according to the invention. It consists of a winding station 110 for winding a metal strip into a coil and an unwinding station 120.
• the winding station 110 and the unwinding station 120 in turn each consist of a plurality of rollers for transporting the metal strip in the transport direction R.
• a first roll 111, a second roll 112 and, as a special feature according to the invention, an additional roll 116 are provided in the winding station, all of which are rotatably mounted on a common frame 114.
• the frame 114 with said rollers is pivoted about a pivot point D by an angle of rotation a.
• a rotary drive 125 is provided for pivoting the frame 114 .
• the term “rotary drive” also includes a flow cylinder with a translational effect, with which the rotary or pivoting movement can also be implemented.
• the unwinding station 120 consists of at least a third roller 123 and a fourth roller 124, which can be individually displaced at least in the vertical direction, ie in terms of their height.
• the vertical displacement or the difference in height can be variable at any time by a displacement device 130 or can be set once and in a fixed manner by so-called intermediate plates and then remain unchanged in this position, or can be fixed in a structurally immovable manner.
• the design using the intermediate plates offers the advantage that fewer control functions are required.
• First roller 111, second roller 112, third roller 123 and fourth roller 124 all of these four rollers form a horizontal roller table plane E1 in their basic or starting position. They are each arranged one behind the other in the transport direction R.
• the axes of rotation of all rollers, including the additional roller 116, are arranged parallel to one another.
• Auxiliary roller 116 is arranged on the frame 114 in such a way that its radial distance xz from the pivot point D of the frame 114 is greater than the radial distance x2 of the pivot point of the second roller 112 from the pivot point D of the frame. Furthermore, the radial distance xz of the additional roller 116 plus the radius of the additional roller is smaller than the minimum radial distance x3 of the pivot point of the third roller 123 to the pivot point D of the frame 114, minus at least the radius ' of the third roller 123. In particular, a collision with the Role 3 are/are constructively excluded.
• the uppermost point of the additional roller 116 is in a first transitional position P1 of the frame 114 and the rollers arranged thereon shown in Figure 1, in which the uppermost points of the first and second rollers form the said horizontal roller table plane E1, at a predetermined distance w below this Roller table level E1 arranged.
• a further additional roller 115 can also be rotatably mounted on the frame 114.
• the further additional roller 115 is then positioned on the frame 114 in such a way that its outer circumference overhangs an imaginary tangential connecting line V between the outer circumferences of the second roller 112 and the additional roller 116—facing the plane of the roller table.
• the diameters of the additional roller 116 and the further additional roller 115 are smaller than the diameters of the first to fourth rollers, for example 2/3 or
• the coil box according to the invention can have a position detector 140 for generating a position signal which represents the position of the additional roller, in particular when the additional roller 116 is at the height of the through the first roller 111 and the second roller 112 in the first
• the position sensor 140 can also be designed to detect the position of the frame 114, in which case the position of the additional roller can then be determined via a kinematic relationship. At this
• the detected position of the frame is representative of the position of the additional role.
• the coiling station 110 there is typically a forming area with infeed rollers for guiding new coils entering the coil box
• the forming area of the winding station 110 is not the subject of the present invention and is therefore not shown in the figures.
• the incoming metal strip is wound into the coil 20 and initially placed on the first roll 111 and the second roll 112 of the winding station 110, the first and second rolls being aligned horizontally and forming the horizontal roller table plane E1. In the context of the present invention, this position is referred to as the starting position for these two roles.
• the coil is caused to slide from its storage position on the first two rollers 111 and 112 into the first transitional position P1 shown in FIG.
• the coil 20 is carried solely by the second roller 112 of the winding station 110 and the third roller 123 of the unwinding station 120.
• the frame 114 is then pivoted back into its starting position, as shown in FIG.
• the coil can also be pulled into the first transitional position P1 by applying a tensile force to the free end of the metal strip wound up to form the coil.
• the train up the free end of the metal strip in the transport direction R can be applied, for example, by a roll stand downstream of the coil box when the free end of the metal strip wound into the coil is clamped in the roll gap of the roll stand.
• the roll stand is not shown in the attached figures.
• the aim of the method according to the invention for operating the coil box is to transfer the wound coil 20 within the coil box 100 from the winding station 110 via a number of transition positions P1, P2 and P3 and a transfer position P4 in the transport direction R to the winding station 120.
• the coil 20 is carried solely by the second roller 112 and the third roller 123.
• the frame 114 is pivoted counterclockwise by an angle aP2 only far enough for the additional roller 116 to bear against the outer circumference of the coil 20 .
• the coil is only carried by the additional roller 116 and the third roller 123.
• the axis of rotation of the additional roller 116 is still below an imaginary connecting line between point D of the frame 114 and the central axis of the coil 20. Only when the frame 114 is pivoted a little further counterclockwise, so that the axis of rotation of the additional roller 116 is on the connecting line between the axis of rotation D of the frame and the center of the coil eye the coil 20 reaches the transfer position P4 shown in FIG.
• the coil 20 is now in a quasi-stable state of equilibrium because its center of gravity lies exactly over the center of the axis of rotation of the third roller 123 .
• the coil 20 can be loaded with the lowest point be lowered below the upper edge of the third roller 123 by no more than a predetermined permissible maximum distance A max at its outer circumference. This is the prerequisite for the said pulling of the coil 20 into the stable equilibrium position, as shown in dashed lines in FIG. 4, being able to be realized solely by strip tension.
• the fourth roller 124 can be lowered with respect to the horizontal plane E1, as shown in FIG.
• FIGS. 5 to 8 show a second exemplary embodiment according to the present invention, in which, in addition to the additional roller 116, another additional roller 115 is rotatably mounted on the frame 114.
• the precise positioning of the further additional roller 115 on the frame has already been described above.
• FIGS. 5 to 8 each show the different transition positions P1, P2 and P3 that the coil 20 must pass through before it reaches the transfer position P4, which is shown in FIG. 8 for the second exemplary embodiment.
• the transition positions P1, P2 and P3 as well the transfer position P 4 is reached in particular by the fact that the frame 114 is increasingly pivoted counterclockwise.
• the second roller 112 in particular, but also the further additional roller 115 and the additional roller 116 reach their respective upper end point.
• this is labeled Top2. This applies both to the first exemplary embodiment without an additional additional roller and to the second exemplary embodiment with an additional additional roller.
• the coil 20 is initially carried solely by the second roller 112 and the third roller 123. Both the further additional roller 115 and the additional roller 116 are still arranged below the coil 20 without making contact with it. Only during the transition from the first transitional position to the second transitional position according to Figure 6 by pivoting the frame 114 with the rollers arranged on it counterclockwise does the further additional roller 115 come to bear against the outer circumference of the coil 20 in addition to the second and third roller.
• the coil 20 By pivoting the frame 114 further counterclockwise about the axis of rotation D, the coil 20 is pressed or displaced even further in the transport direction R and thus reaches the transfer position P4; see FIG. 8.
• the coil 20 has become detached from the further additional roller 115 and is now only lying on the additional roller 116 and the third roller 123.
• the coil 20 In this transfer position, the coil 20 is in an unstable equilibrium situation. All rollers on the frame 114 have each reached their upper end position; for the second roller 112, this is also identified here with the reference symbol Top2.
• the center point of the additional roll 116 lies on an imaginary connecting line between the pivot point D of the frame 114 and the center of the coil 20.
• the coil 20 can also be transferred from the unstable equilibrium position to a stable equilibrium position either by pulling on the free end of the belt in the transport direction R and/or by lowering the third roller 123 below the level E1, with the coil 20 then opening up of the third roll 123 and the fourth roll 124 of the unwinding station 120 rests.
• the movement of both the third roller 123 and that of the fourth roller 124, in particular in the vertical direction, can be realized by the displacement device 130, which acts on the rollers, or in some other way, as explained above in the context of the description of FIG .
• a lowering of the fourth roller 124 makes it easier to deposit the coil in the unwinding station and to forward the unwound metal strip to a subsequent processing device, e.g. B. a rolling mill.
• a position detector can be provided for generating a position signal which signals that at least one of the rollers 111, 112, 115, 116 rotatably mounted on the frame 114 has reached the transfer position P4 and thus its respective upper end position Top2. According to the invention, this position signal is used as a confirmation signal that the coil has safely left the winding station. According to the invention is only generated in response to the
• the provision of the additional roller 116 and possibly the further additional roller 115 according to the invention enhances the fundamentally passive coil transport on which the invention is based, in that the position of the coil during the transition between the winding station 110 and the unwinding station can now be adjusted by the provision of the additional roller according to the invention 120 can be reliably detected at any time, in particular by detecting the positions of the additional roller 116 and/or the further additional roller 115 with the aim of increasing the productivity of a coil box with purely passive coil displacement without further active actuators.
• R material flow direction transport direction of the coil TOP2 highest position of the second roller V imaginary connecting line w predetermined distance r2 radius roll 116 r3 radius roll 123 xcp distance projected xzp distance projected x2 radial distance x3 radial distance xz radial distance

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

Applications Claiming Priority (2)

Publications (1)

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ID=81387119

Family Applications (1)

Country Status (6)

Family Cites Families (7)

• 2021
  • 2021-04-30 DE DE102021204375.5A patent/DE102021204375A1/de active Pending
• 2022
  • 2022-03-24 JP JP2023565400A patent/JP2024518764A/ja active Pending
  • 2022-03-24 WO PCT/EP2022/057853 patent/WO2022228791A1/de active Application Filing
  • 2022-03-24 US US18/557,938 patent/US20240058854A1/en active Pending
  • 2022-03-24 CN CN202280031267.XA patent/CN117222485A/zh active Pending
  • 2022-03-24 EP EP22718868.7A patent/EP4329956A1/de active Pending

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