Method for providing inserts for backup rolls and / or work rolls of a roll stand and system having an apparatus for providing inserts for backup rolls and / or work rolls of a roll stand

Abstract

The present invention relates to a method for providing backup rolls and / or inserts (1) for work rolls of a roll stand required during roll change. In order to simplify the logistics during the replacement of the rolls of the roll stand, particularly the backup rolls, and to shorten the replacement time, the method comprises: a) assembling at least one insert (1), preferably at least two or three inserts (1), into an insert pack (2) at a first position remote from the roll stand; b) moving the insert pack (2) to a carrier element (3) at the first position; c) transporting the carrier element (3) together with the insert pack (2) from the first position to a position near the roll stand; d) removing the insert pack (2) from the carrier element (3) at the position near the roll stand; and e) using the insert (1) during roll change. Furthermore, the present invention relates to an apparatus therefor.

Description

[Technical Field]

[0001] The present invention relates to a method for providing inserts for the backup rolls and / or work rolls of a roll stand required during roll changes. The present invention also relates to an apparatus for the same. A system having Regarding. [Background technology]

[0002] In particular, when changing the backup rolls of a roll stand, inserts are required, which are placed in so-called change carriages. The inserts are used to compensate for roll wear on the lower roll so that the level of the upper edge of the lower work roll is subject to as little variation as possible. The inserts are replaced in the change carriage. It is customary to transport each insert individually from the preparation area to the backup roll change pit using an indoor crane. Each individual insert is inserted separately into the backup roll change carriage and centered. When removing, the corresponding steps are performed in reverse order.

[0003] U.S. Pat. No. 3,782,161 describes a typical method used when changing rolls in a roll stand, in which a number of plates are provided which are arranged independently of one another and which serve the individual parts to be changed. A similar method is disclosed in DE-A-2520666, and another similar solution is shown in GB-A-2574858 and DE-A-202022100413.

[0004] A disadvantage is that changing the backup rolls takes a correspondingly long time: the individual insert plates must be removed and new ones installed, which in each case requires a corresponding crane movement, and only then can the new backup roll be inserted.

[0005] Up to 30 crane movements may be required to transport an individual insert to the roll change pit (including empty crane runs). Each insert is moved and secured individually. Furthermore, each insert must be centered within the change carriage. During assembly or disassembly, each insert is secured by two eyebolts.

[0006] The problem is that the individual insert plates stick together very tightly, as the oil between the plates creates a strong adhesive force that makes it difficult to disassemble the individual plates. When the plates are suspended by a crane, there is a risk that the stuck plates will come loose and fall during transport. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] U.S. Patent No. 3,782,161 [Patent Document 2] West German Patent Application Publication No. 2520666 [Patent Document 3] GB Patent Application Publication No. 2574858 [Patent Document 4] German Utility Model No. 202022100413 Summary of the Invention [Problem to be solved by the invention]

[0008] The problem underlying the present invention is to simplify the logistics and reduce the change time of rolls in a roll stand, especially backup rolls. This should improve the economics of the rolling process. That is, the insert change time should be significantly reduced, which in turn should lead to a corresponding reduction in the backup roll change time. Finally, the safety of employees should be improved. [Means for solving the problem]

[0009] The solution to this problem according to the invention is a general method for providing inserts for backup rolls and / or work rolls of a roll stand that are required during a roll change, the method comprising: a) assembling at least one insert, preferably at least three inserts, into an insert pack at a first location remote from the roll stand; b) introducing the insert pack into the carrier element at a first position the carrier element comprises a carrier frame having means for coupling to a crane, and coupling means for matingly coupling the inserts assembled in the insert pack to the carrier frame, the coupling means being formed as or having screws, recesses corresponding to the positions of the screws being formed in the insert, and a base plate formed with threaded holes for receiving the screws, the base plate being formed to support the insert pack; c) transporting the carrier element with the insert pack from the first position to a position adjacent to the roll stand; d) removing the insert pack from the carrier element at a location adjacent the roll stand; e) using inserts during roll changes; It is intended to include.

[0010] Step d) may comprise intermediately storing the insert pack in an intermediate storage element.

[0011] Prior to said step e), the insert pack may be introduced into the roll changing carriage.

[0012] The first location is a staging station (spaced relative to the roll stand where the roll is to be changed).

[0013] The location near the roll stand is preferably a roll change pit or a location immediately adjacent to the roll change pit.

[0014] The method is particularly implemented for changing the backup roll of a roll stand.

[0015] Inserts for backup rolls and / or work rolls in roll stands required during roll changes and the assembled inserts in the insert pack. Apparatus for providing and / or delivering A system havingAccording to the present invention, the present invention includes a carrier frame having means for coupling to a crane, and coupling means for matingly coupling the inserts assembled in the insert pack to the carrier frame. The coupling means are formed as or have screws, recesses corresponding to the positions of the screws are formed in the insert, and the device has a base plate formed with threaded holes for receiving the screws, the base plate being formed to support the insert pack. .

[0016] Particularly preferably, two screws are arranged diagonally on the carrier frame.

[0017] Additionally, centering means may be disposed on the carrier frame, configured to center the insert pack relative to the carrier frame.

[0018] For optimal fixation of the individual inserts 、 Each has two recesses establish In this way, when the screw is screwed in, the individual inserts are fixed.

[0019] As explained above, the problem is that the insert pack sticks to the base on which it is placed due to adhesion (due to the oil film). To solve this problem, a development is proposed in which the length of the threaded part of the screw is preferably 1 to 5 mm longer than the length of the screw hole in the base plate. In that case, by tightening the screw, it is possible to separate the insert pack from the base and thus overcome the sticking.

[0020] As explained, the proposed method and the described device are particularly used for changing insert packs in backup roll changing carriages of rolling mills.

[0021] The method or device allows for a reduced change time of the insert in the (backup roll) change carriage, and therefore for a reduced change time of the (backup) roll in general.

[0022] The inserts are grouped together in an insert pack of at least one, preferably at least two or three, in particular up to five inserts. The pack or package can thus be transported as one piece (by an indoor crane). This significantly reduces the crane movements and thus the "delivery time" of the inserts (to the exchange carriage or exchange pit). The centering means are intended for accurate centering of the insert pack. A reliable and secure connection between the carrier element and the insert pack can be achieved by only two screws, which offers corresponding advantages in handling.

[0023] The insert packs are prepared specifically at the preparation station.

[0024] An intermediate storage element (a type of "dummy carriage") is provided with the required insert packs. The intermediate storage element preferably has several areas, i.e., an area for used insert packs for the drive side and an area for freshly prepared insert packs for the drive side and an area for freshly prepared insert packs for the drive side and an area for freshly prepared insert packs for the drive side and an area for freshly prepared insert packs for the drive side and the operating side. Receptacles in the intermediate storage element are configured so that the insert packs can be held therein and can be removed therefrom by a lifting tool (a carrier element lifted by an indoor crane). The intermediate storage element can be transported to the roll change pit by a crane or other transport device.

[0025] The intermediate storage element together with the newly set insert pack can be transported by the lifting tool to the rolling installation as close as possible to the exchange area (ie to the (backup) roll change pit).

[0026] The (back-up) roll is then removed from the roll stand and taken out of the roll change pit.

[0027] The intermediate storage element containing the prepared insert packs is received by a lifting tool (crane) and moved to one side (operation side) of the (backup) roll change carriage.

[0028] The insert pack is preferably fixed manually via said two screws, however fixing of the insert pack in the carrier element can also be achieved by other conventional fixing means (e.g. by an automatic locking device or lever).

[0029] The (old) insert pack is then lifted from the roller change carriage by the carrier element and placed on the intermediate storage element.

[0030] Thus, the carrier element is moved over a new (supplied) insert pack on each side (drive side or operating side), the insert pack is fixed as described above, positioned in an empty position in the exchange pit and detached from the carrier element by loosening the screws.

[0031] This process is then repeated for the side that has not yet been processed.

[0032] The fastening or unfastening on the carrier element and the fastening on the roll change carriage can also be carried out automatically, for which purpose corresponding devices can be provided on the carrier element.

[0033] A gap (approximately 1-5 mm) can be created between the insert pack and its support (the cover of the load cell) by tightening the screws; this gap facilitates the dissociation of the insert pack (by overcoming adhesion).

[0034] This results in a simple installation of the insert pack and a significant time saving compared to known procedures. Likewise, the reliability of the process is guaranteed.

[0035] The drawings show an embodiment of the invention. [Brief explanation of the drawings]

[0036] [Figure 1] A plurality of inserts assembled into an insert pack mounted on a base plate of a carrier element. [Figure 1a] Enlarged view of part of the base plate [Figure 2] Carrier element to house insert packs [Figure 2a] 1 is an enlarged view of a portion of the carrier element that cooperates with the insert pack, i.e., the centering means; [Figure 3] A carrier element containing an insert pack, the insert pack being secured to the carrier element by screws. [Figure 3a] Close-up of the base plate with the screws threaded in [Figure 4] Carrier element to house insert packs [Figure 5] Intermediate storage element with multiple, i.e., four, receptacles for insert packs [Figure 6] Part of a roll stand, a roll change carriage and a roll change pit, with an intermediate storage element arranged next to the roll change pit [Figure 6a] Carrier element accommodates insert pack [Figure 7] Transporting new insert packs from the intermediate storage element to the roll change carriage [Figure 8] 7, in which a new insert pack is still present in the intermediate storage element and another new insert pack has already been placed in the roll change carriage. [Figure 9] Roll change carriage with two new insert packs and two old insert packs placed in an intermediate storage element DETAILED DESCRIPTION OF THE INVENTION

[0037] In FIG. 1, four inserts 1 can be seen assembled into an insert pack 2. The inserts 1 are required to replace the backup rolls of a roll stand. For this purpose, the inserts 1 are prepared in a preparation station (spaced apart from the roll stand and not shown in the figure) and then transported (by means of an indoor crane) to the roll stand where the inserts are required for the roll change. The insert pack 2 rests on a base plate 12, which is a (so to speak) temporary component of a carrier element 3 provided for transporting the inserts 1. On the other hand, the entire pack consisting of the inserts 1 and the base plate 12 is attached to the roll stand, so that the base plate 12 remains a component of the pack 2.

[0038] In Figure 1a it can be seen that the base plate 12 has recesses in its lower area into which inserts with threaded holes 13 are introduced. The screws 8, 9 which fasten the insert pack 2 to the carrier element 3 are screwed into the threaded holes 13. To ensure this, the individual inserts 1 are provided with recesses 11 into which the shafts of the screws 8, 9 lie when the screws are screwed into the base plate 12. As can be seen in Figure 1, two recesses 11 are provided per insert 1, one diagonally.

[0039] In figure 2 it can be seen how the carrier element 3 grips the insert pack 2 in order to store and transport the insert pack. For this purpose the carrier element 3 consists of a carrier frame 7 which can be coupled to an indoor crane (not shown).

[0040] A plurality of (in the example six) centering means 10 are fixed to the carrier frame 7, which are formed as vertically extending rods with a chamfer 14 in their lower end region, as can be seen in FIG. 2a.

[0041] Figure 3 shows how the carrier element 3 grips the insert pack 2, which is fixedly (snugly) connected to the carrier element. For this purpose, both screws 8 and 9 are guided via corresponding through-holes in the upper area of ​​the carrier frame 7. The screws 8, 9 are screwed into a base plate 12 and into threaded holes 13 (see Figure 1a) provided therein. A recess 11 (see Figure 1) fixes the insert pack 2 relative to the carrier element 3.

[0042] Problems sometimes arise due to the fact that the insert pack 2, especially the underside of the base plate 12, is held to the foundation by adhesive. G The length of the screw hole L is shown in Figure 3a. B This makes it possible to move the underside of the base plate 12 away from the foundation by screwing in the screws 8, 9 accordingly, thus eliminating the adhesive effect.

[0043] In Figure 4 it can again be seen how the carrier element 3 has gripped the underlying insert pack 2. The insert pack is then transported (by means of an indoor crane) to the intermediate storage element 4, as illustrated in Figure 5. In this example, the intermediate storage element 4 has four receptacles 15, one for each insert pack 2. Figure 5 illustrates how two of the receptacles 15 (i.e. the two middle receptacles) are each equipped with a new insert pack 2', and here again the carrier element 3 is shown having just moved the insert pack 2' into the receptacles 15 of the intermediate storage element 4.

[0044] Further Figures 6 to 9 show different stages illustrating the process of providing a new insert pack 2' for roll change on the backup roll of the roll stand, replacing the old insert pack 2" with a new insert pack 2'. The old insert pack 2" is removed from the roll stand or roll change carriage.

[0045] In Figure 6, firstly one can see the intermediate storage element 4 with the assembly of two new insert packs 2' (as shown in Figure 5). The intermediate storage element 4 is located immediately next to the roll change pit 6, in which the roll change carriage 5 is also arranged. In Figure 6, the roll change carriage 5 still carries the two used insert packs 2" that have been removed from the roll stand. Figure 6a again illustrates the gripping of the insert packs 2 from either the intermediate storage element 4 or the roll change carriage 5.

[0046] In Figure 7 it can be seen how a new insert pack 2' is transferred from the intermediate storage element 4 to the roller change carriage 5. The intermediate storage element 4 is provided with a new insert pack 2' and a used insert pack 2''.

[0047] Figure 8 shows how the new insert pack 2' has been moved into the roller change carriage 5. At this stage, the exchange of the old insert pack 2" by the new insert pack 2' for one side of the roll stand (drive or operating side) has been half-completed.

[0048] Finally, FIG. 9 illustrates how two old insert packs 2 ″ are moved into the intermediate storage element 4 and two new insert packs 2 ′ are moved into the roller change carriage 5 .

[0049] The intermediate storage element 4 can be positioned by an indoor crane either next to or after the roll exchange pit 6 as required.

[0050] The described arrangement and procedure can simplify the logistics when supplying new insert packs to a roll stand or roll change carriage, resulting in a significant reduction in the number and duration of crane movements. The present application relates to the invention described in the claims, but may also include the following as other aspects. 1. 1. A method for providing inserts (1) for backup rolls and / or work rolls of a roll stand required during roll changes, the method comprising: a) assembling at least one insert (1), preferably at least two or three inserts (1), into an insert pack (2) at a first position away from the roll stand; b) introducing the insert pack (2) into the carrier element (3) at a first position; c) transporting the carrier element (3) together with the insert pack (2) from the first position to a position near the roll stand; d) removing the insert pack (2) from the carrier element (3) at a position near the roll stand; e) using the insert (1) during roll changes; The method of claim 1, further comprising: 2. 2. The method according to claim 1, wherein step d) of claim 1 comprises intermediately storing the insert pack (2) in an intermediate storage element (4). 3. 3. The method according to claim 1 or 2, characterized in that before step e) of claim 1, the insert pack (2) is introduced into the roll changing carriage (5). 4. 4. The method according to any one of 1 to 3 above, wherein the first location is a preparation work area. 5. 5. The method according to any one of 1 to 4 above, wherein the position in the vicinity of the roll stand is a roll exchange pit (6) or a position immediately adjacent to the roll exchange pit. 6. 6. The method according to any one of 1 to 5 above, characterized in that the method is carried out for replacing a backup roll of a roll stand. 7. A device for providing and / or transporting inserts (1) for back-up rolls and / or work rolls of a roll stand required during roll changes, said device comprising: a carrier frame (7) with means for coupling to a crane; - coupling means (8, 9) for matingly coupling the inserts (1) assembled in the insert pack (2) to the carrier frame (7); An apparatus comprising: 8. 8. Device according to claim 7, characterized in that the coupling means (8, 9) are formed as or have threads. 9. 9. The device according to claim 8, characterized in that the two screws (8, 9) are preferably arranged diagonally on the carrier frame (7). 10. An apparatus according to any one of claims 7 to 9, characterized in that a centering means (10) formed for centering the insert pack (2) relative to the carrier frame (7) is arranged on the carrier frame (7). 11. The device according to any one of items 8 to 10 above, characterized in that recesses (11), preferably two recesses (11) each corresponding to the positions of the screws (8, 9), are formed in the insert (1). 12. 12. The device according to any one of claims 8 to 11, characterized in that the device has a base plate (12) formed with screw holes (13) for receiving screws (8, 9), and the base plate (12) is formed to support an insert pack (2). 13. The length of the threads of the screws (8,9) (L G ) is the length (L B 13. The device according to claim 12, wherein the diameter of the nozzle is preferably 1 mm to 5 mm larger than the diameter of the nozzle. [Explanation of symbols]

[0051] 1 insert 2 insert packs 2' New Insert Pack 2” Old Insert Pack 3. Career Elements 4 Intermediate storage elements 5 Roll change carriage 6 Roll change pit 7 Carrier Frame 8. Connection means (screws) 9. Connection means (screws) 10 Centering means 11 Recess in insert 12 Base Plate 13 screw holes 14 Chamfering 15 Insert pack compartment L G Thread length L B Screw hole length

Claims

1. 1. A method for providing inserts (1) for backup rolls and / or work rolls of a roll stand required during roll changes, the method comprising: a) assembling at least one insert (1), or at least two or three inserts (1) into an insert pack (2) in a first position away from the roll stand; b) introducing the insert pack (2) into a carrier element (3) in a first position, the carrier element (3) comprising a carrier frame (7) with means for coupling to a crane and coupling means (8, 9) for snap-fittingly coupling the inserts (1) assembled in the insert pack (2) to the carrier frame (7), the coupling means (8, 9) being formed as screws, recesses (11) corresponding to the positions of the screws (8, 9) being formed in the insert (1), and there being a base plate (12) formed with threaded holes (13) for receiving the screws (8, 9), the base plate (12) being formed to support the insert pack (2); c) transporting the carrier element (3) together with the insert pack (2) from the first position to a position near the roll stand; d) removing the insert pack (2) from the carrier element (3) at a position near the roll stand; e) using the insert (1) during roll changes; The method of claim 1, further comprising:

2. 2. The method according to claim 1, characterized in that step d) of claim 1 comprises the step of intermediately storing the insert pack (2) in an intermediate storage element (4).

3. 2. A method according to claim 1, characterized in that before step e) of claim 1, the insert pack (2) is introduced into the roll-changing carriage (5).

4. 10. The method of claim 1, wherein the first location is a staging area.

5. 2. The method according to claim 1, wherein the location near the roll stand is a roll change pit (6) or a location immediately adjacent to this roll change pit.

6. 6. The method according to claim 1, wherein the method is carried out for replacing a backup roll of a roll stand.

7. A system having a device for providing and / or transporting inserts (1) for backup rolls and / or work rolls of a roll stand required during roll changes, and the inserts (1) assembled into insert packs (2), The device, a carrier frame (7) provided with means for coupling to a crane; - coupling means (8, 9) for matingly coupling the inserts (1) assembled in the insert pack (2) to the carrier frame (7); Including, the coupling means (8, 9) are formed as threads, and recesses (11) corresponding to the positions of the threads (8, 9) are formed in the insert (1); the device has a base plate (12) formed with threaded holes (13) for receiving the screws (8, 9), the base plate (12) being formed to support the insert pack (2); A system characterized by:

8. 8. A system according to claim 7, characterized in that the two screws (8, 9) are arranged diagonally on the carrier frame (7).

9. 8. A system according to claim 7, characterized in that centering means (10) are arranged on the carrier frame (7) which are designed to center the insert pack (2) relative to the carrier frame (7).

10. 8. A system according to claim 7, characterized in that two recesses (11) are formed in each insert (1).

11. The length of the threaded portion of the screws (8, 9) (L Ｇ ) is the length (L Ｂ 11. The system according to claim 7, wherein the number of inputs is greater than 1.

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