Method and device for providing insertion laminations of support rolls and / or work rolls of a roll stand

Abstract

The invention relates to a method for providing an insert stack (1) of a support roll and / or a working roll of a roll stand, said insert stack being required for changing the rolls. In order to simplify the material flow during the replacement of a roll of a roll stand, in particular of a backup roll, and to reduce the replacement time, according to the invention, the method comprises the following steps: a) arranging at least one insert lamination (1), preferably at least two or three insert laminations (1) together to form an insert lamination stack (2) at a first position remote from the roll stand; b) placing the insert stack (2) at the first position into the carrier element (3); c) transporting the carrier element (3) together with the insert stack (2) from a first position to a position close to the roll stand; d) removing the insert stack (2) from the carrier element (3) at a position close to the roll stand; e) using the insert laminations (1) when changing the rolls. The invention also relates to a device for this purpose.

Description

Technical Field

[0001] The invention relates to a method for providing insert stacks of support rolls and / or working rolls of a rolling mill stand, which insert stacks are required when changing the rolls, and to a device for this purpose. Background Art

[0002] In particular, when changing the support rolls of a rolling mill stand, insert stacks are required, which are placed in a so-called change slide. These insert stacks are used to compensate for the roll wear of the lower rolls so that the level of the upper edge of the lower working roll is subject to the smallest possible fluctuations. In this case, the insert stacks are changed in the change slide. In this case, the corresponding insert stacks are usually transported one by one from the preparation shop to the support roll change channel by means of an indoor crane. Each individual insert stack is hereby inserted into the support roll change slide and centered. For disassembly, the corresponding steps are carried out in reverse order.

[0003] Patent document US Pat. No. 3,782,161 A describes such a method for replacing rolls of a rolling mill stand. In this patent document, a plurality of plates are provided, which are arranged independently of one another and are used for the individual components to be replaced.

[0004] A disadvantage is that the replacement of the support rollers takes a correspondingly long time: the corresponding insert plate needs to be removed and a new insert plate installed, which in each case requires a corresponding crane trip; only then can the new support roller be inserted.

[0005] In this case, up to 30 crane movements may be required to transport the individual insert stacks to the roll change channel (including the idle travel of the crane). Each insert stack is moved and fixed individually. In addition, each insert stack must be centered in the change carriage. During assembly or disassembly, each insert stack is fixed with two eyebolts.

[0006] Another problem here is that the individual insert plates are firmly attached to each other, because the oil creates strong adhesion between the plates and makes it difficult to remove the individual plates. The plates that are stuck to each other and suspended from the crane can separate during transportation and fall off, thus creating a risk of accidents. Summary of the invention

[0007] The object of the invention is to simplify the logistics when changing rolls of a rolling mill stand, in particular when changing the backup rolls, and to reduce the change time. This is intended to improve the economic efficiency of the rolling process. The insertion stack change time is thus to be significantly reduced, which in turn reduces the backup roll change time. Ultimately, the safety of the employees is intended to be improved.

[0008] The solution to this object according to the invention is a method for providing insert stacks of support rolls and / or working rolls of a rolling mill stand, which insert stacks are required when changing the rolls, comprising the following steps:

[0009] a) arranging at least one insert lamination, preferably at least three insert laminations together to form an insert lamination stack at a first position remote from the rolling mill stand;

[0010] b) placing the insert lamination stack at the first position into the carrier element;

[0011] c) transporting the carrier element together with the inserted lamination stack from the first position to a position close to the rolling mill stand;

[0012] d) removing the inserted lamination stack from the carrier element at a position close to the rolling mill stand;

[0013] e) Use insert stacks when changing rolls.

[0014] The above-mentioned step d) may include the following step: temporarily storing the inserted laminated core in a temporary storage element.

[0015] Prior to the above step e), the insert lamination stack can be placed in a roll changing slide.

[0016] The above-mentioned first location is in particular a preparation shop (which is located at a certain distance from the rolling mill stand where the rolls are to be replaced).

[0017] The position close to the rolling mill stand is preferably a roll changing channel or a position close to the roll changing channel.

[0018] The method is carried out in particular for replacing backup rolls of a rolling stand.

[0019] According to the invention, a device for providing and / or transporting insert stacks for support rolls and / or working rolls of a rolling mill stand (the insert stacks are required when replacing the rolling rolls) comprises: a carrier frame, which has a mechanism for connecting to a crane; and a connecting member, which is used to connect the insert stacks arranged together to form an insert stack group to the carrier frame in a form-fitting manner.

[0020] The connecting element is in particular designed as a screw or comprises a screw. Particularly preferably, two screws are arranged, in particular diagonally (diagonally), on the support frame.

[0021] Furthermore, a centering device can be arranged on the carrier frame, which device is designed to center the inserted laminated stack relative to the carrier frame.

[0022] For optimal fixing of the individual insert laminations, the insert laminations can have recesses, preferably two recesses in each case, which correspond to the position of the screws and thus fix the individual insert laminations after the screws have been screwed in.

[0023] The device also preferably comprises a base plate configured with threaded holes for engaging screws, wherein the base plate is configured to carry the inserted lamination stack.

[0024] As mentioned above, there is also the problem that the insert lamination stack adheres to the base on which it is placed due to adhesion (due to the oil film). In order to be able to solve this problem, a development provides that the thread length of the screw is greater than the length of the threaded hole in the base plate, preferably 1 mm to 5 mm greater. The insert lamination stack can then be pressed away from the base by tightening the screw and the adhesion can thus be overcome.

[0025] As explained, the proposed method or the described device is used in particular for changing an inserted lamination stack in a support roll changing carriage of a rolling mill.

[0026] The method or the device allows shortening the replacement time of the insert stack in the (support roller) replacement carriage and thus shortening the replacement time of the roll (support roller) overall.

[0027] In order to form an insert lamination stack, at least one, preferably at least two or three, in particular a maximum of five insert laminations are arranged together. The assembly is then transported as a single component (via an indoor crane). This significantly reduces the crane travel and significantly shortens the "delivery time" of the insert laminations (to the replacement slide or replacement channel). The centering mechanism is provided for precise centering of the insert lamination stack. A reliable and firm connection between the carrier element and the insert lamination stack can be achieved with only two screws, which brings corresponding advantages in terms of handling.

[0028] The insert laminated core is prepared in advance, in particular, in a preparation workshop.

[0029] The temporary storage element (a "dummy slide" to some extent) is equipped with the required insert lamination stacks. The temporary storage element preferably has a plurality of areas, namely areas for already used insert lamination stacks on the drive side and on the operating side, and areas for newly adjusted insert lamination stacks, likewise for the drive side and on the operating side. The receptacle in the temporary storage element is designed so that the insert lamination stack is held there and can be removed there from by a lifting tool (a carrier element lifted by a crane in the room). The temporary storage element can be transported to the roll changing channel by a crane or with the aid of other transport equipment.

[0030] The intermediate storage element can also be transported together with the newly adjusted inserted lamination package by means of a lifting tool to the rolling mill as close as possible to the changing area (ie to the (support roll) roll changing channel).

[0031] The (backup roll) roll is then moved out of the mill stand and removed from the roll changing channel.

[0032] The temporary storage element including the pre-prepared insertion lamination pack is picked up by means of a lifting device (crane) and moved to one side (operating side) of the (support roll) roll changing carriage.

[0033] The insert lamination stack is preferably fixed manually using the two screws mentioned. However, the insert lamination stack can also be fixed on the carrier element by other conventional fixing devices, for example by an automatic locking device or by a lever.

[0034] The (old) inserted lamination pack is then lifted from the roll change slide using the carrier element and placed on the intermediate storage element.

[0035] The carrier element is now moved over the new (delivered) insert laminated core of the respective side (drive side or operating side), which has been fixed here as described above and is now positioned in the now unoccupied position in the replacement channel and released from the carrier element by loosening the screws.

[0036] This process is then repeated for the side that has not yet been processed. The fixing or release in the carrier element and the fixing in the roll change slide can also be performed automatically. For this purpose, corresponding devices can be provided on the carrier element.

[0037] By tightening the screws, a gap (approx. 1 to 5 mm) is created between the insert laminate and the support (cover of the dynamometer) of the same insert laminate, which gap (by overcoming the adhesion) makes it easier to release the insert laminate.

[0038] Compared to previously known processes, the installation of the insert lamination pack is thereby made much simpler and significantly time-saving, while at the same time ensuring the safety of the method. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings illustrate embodiments of the present invention.

[0040] Figure 1 A plurality of insert laminations arranged together to form an insert lamination pack are shown, the insert laminations resting on a bottom plate of a carrier element,

[0041] Figure 1a An enlarged view of a portion of the bottom plate is shown,

[0042] Figure 2 A carrier element is shown which accommodates exactly one inserted lamination stack.

[0043] Figure 2a An enlarged view of a portion of the carrier element, namely of the centering mechanism cooperating with the insertion of the laminated stack, is shown.

[0044] Figure 3 shows a carrier element which already accommodates an insert laminated core, wherein the insert laminated core is fixed to the carrier element by means of screws,

[0045] Figure 3a An enlarged view of a portion of the base plate into which a screw is screwed is shown,

[0046] Figure 4 A carrier element is shown which accommodates an inserted lamination stack.

[0047] Figure 5 A buffer element is shown which has a plurality of, namely four, receptacles for inserting a laminated core.

[0048] Figure 6 A section of a rolling mill stand with a roll changing carriage and a roll changing channel is shown, wherein a temporary storage element is arranged next to the roll changing channel,

[0049] Figure 6a The insertion of the laminated core by means of a carrier element is shown.

[0050] Figure 7 The transport of a new insert lamination pack from the intermediate storage element to the roll changing slide is shown.

[0051] Figure 8 Shown according to Figure 7 A device in which a new inserted laminated core is still located in the intermediate storage element and another new inserted laminated core is already placed in the roll changing slide, and

[0052] Fig. 9 The roll changing carriage is shown with two new inserted laminated cores and two old inserted laminated cores arranged in an intermediate storage element. DETAILED DESCRIPTION

[0053] exist Figure 1Four insert stacks 1 can be seen, which are arranged together to form an insert stack 2. The insert stacks 1 are required for changing the support rolls of a rolling mill stand. For this purpose, the insert stacks 1 are prepared in a preparation shop (which is located at a certain distance from the rolling mill stand and is not shown in the figure) and then transported (by means of an indoor crane) to the rolling mill stand where they are needed for changing the rolls. The insert stack 2 rests on a base plate 12, which is (somewhat temporarily) a component of the carrier element 3 for transporting the insert stacks 1. On the other hand, the entire assembly consisting of the insert stack 1 and the base plate 12 is assembled in the rolling mill stand, so that the base plate 12 is still a component of the assembly 2 in this respect.

[0054] exist Figure 1a As can be seen in the figure, the base plate 12 has a recess in its lower region, into which an insert provided with a threaded hole 13 is placed. Screws 8, 9 are screwed into the threaded holes 13, which fix the insert lamination stack 2 on the carrier element 3. In order to achieve this reliably, each insert lamination 1 has a recess 11, in which the shank of the screw 8, 9 is located when the screw 8, 9 is screwed into the base plate 12. The two recesses 11 of each insert lamination 1 are arranged diagonally, as shown in FIG. Figure 1 shown.

[0055] exist Figure 2 It can be seen how the carrier element 3 holds the inserted lamination stack 2 in order to accommodate and transport it. The carrier element 3 is composed of a carrier frame 7 for this purpose, which can be connected to an indoor crane (not shown in detail in the figure).

[0056] Here, a plurality of (six in the embodiment) centering means 10 are fixed to the carrier frame 7, wherein the centering means are configured as bars extending in the vertical direction and have an introduction bevel 14 in the lower end region, such as Figure 2a shown. Figure 3 It is shown how the carrier element 3 clamps the insert laminated core 2 and how the insert laminated core is firmly (positively connected) to the carrier element. For this purpose, two screws 8 and 9 are guided through corresponding through holes in the upper region of the carrier frame 7. The screws 8, 9 are screwed into the base plate 12 and into the threaded holes 13 provided there (see Figure 1a ). Through the recess 11 (see Figure 1 ), the inserted laminated core 2 is fixed relative to the carrier element 3.

[0057] Sometimes the problem occurs that the underside of the insert laminated core 2 and in particular the underside of the base plate 12 is held at the base due to adhesion. To avoid this, the thread length L of the screws 8, 9 is G Designed to be larger than the threaded hole length L B ,like Figure 3aAs shown. Thus, by correspondingly tightening the screws 8, 9, the underside of the base plate 12 can be pressed away from the base, thereby eliminating the adhesion effect.

[0058] exist Figure 4 It can be seen again how the carrier element 3 holds the inserted lamination stack 2 located below. It is then transported (by means of an indoor crane) to the Figure 5 The intermediate storage element 4 is shown. In this exemplary embodiment, the intermediate storage element 4 has four receptacles 15 for corresponding insertion of the laminated core 2 . Figure 5 It is shown how two of the receptacles 15 , namely the two central receptacles, are each equipped with a new insert laminated core 2 ′, wherein the carrier element 3 is shown again here, which precisely places the insert laminated core 2 ′ into the receptacle 15 of the intermediate storage element 4 .

[0059] In another Figures 6 to 9 , the various stages are shown which illustrate the process of providing a new insert laminated core 2' for changing the support rolls of a rolling mill stand, wherein the new insert laminated core 2' replaces the old insert laminated core 2". Here, the old insert laminated core 2" is transported away from the rolling mill stand or the roll changing slide.

[0060] First, in Figure 6 It can be seen that there are two new temporary storage elements 4 (such as Figure 5 The temporary storage element 4 is adjacent to the roll changing channel 6, where the roll changing slide 5 is arranged. Figure 6 In the embodiment shown in FIG. 1 , the roll changing slide 5 is still provided with two used insert lamination packs 2" which have been removed from the rolling mill stand. Figure 6a The insertion of the laminated core 2 from the intermediate storage element 4 or from the roll changing carriage 5 is shown again.

[0061] exist Figure 7 It can be seen how a new insert laminated core 2' is transported from the intermediate storage element 4 to the roll changing slide 5. The intermediate storage element 4 is still equipped with a new insert laminated core 2' and is already equipped with a used insert laminated core 2".

[0062] Figure 8 It is shown how a new insert lamination stack 2' is placed in the roll changing slide 5. At this stage, for one side of the rolling mill stand (drive side or operating side), the old insert lamination stack 2" has been replaced by half by the new insert lamination stack 2'.

[0063] at last, Fig. 9 It is shown how two old insert laminated cores 2 ″ are placed in the intermediate storage element 4 and how two new insert laminated cores 2 ′ are placed in the roll changing carriage 5 .

[0064] If necessary, the temporary storage element 4 can be placed on the side or behind the roll changing channel 6 using an indoor crane.

[0065] The described components and processes can ensure that the logistics when supplying the rolling stand, or more precisely the roll changing carriage, with new insertion stacks are simplified and thus the number and duration of crane trips can be significantly reduced.

[0066] List of reference numerals:

[0067] 1 Insert the stack

[0068] 2 Insert the lamination pack

[0069] 2' New Insertion Lamination Pack

[0070] 2" old insert lamination pack

[0071] 3 Carrier elements

[0072] 4 Temporary storage components

[0073] 5 Roller replacement slide

[0074] 6 Roller replacement channel

[0075] 7 Carrier frame

[0076] 8 Connectors (screws)

[0077] 9 Connectors (screws)

[0078] 10 Centering mechanism

[0079] 11 Insert into the recess in the lamination

[0080] 12 Bottom Plate

[0081] 13 Threaded holes

[0082] 14. Introducing the Incline

[0083] 15 Receptacle for inserting the laminated core

[0084] L G Thread length

[0085] L B Length of threaded hole.

Claims

1. A method for providing insert stacks (1) for support rolls and / or working rolls of a rolling mill stand, the insert stacks being required when changing the rolls, wherein: The method comprises the following steps: a) arranging at least one insert lamination (1), preferably at least two or three insert laminations (1) together at a first position remote from the rolling mill stand to form an insert lamination group (2); b) placing the insert lamination stack (2) at the first position into a carrier element (3); c) transporting the carrier element (3) together with the inserted lamination stack (2) from the first position to a position close to the rolling mill stand; d) removing the inserted lamination stack (2) from the carrier element (3) at a position close to the rolling mill stand; e) The insert stack (1) is used when changing rolls.

2. The method according to claim 1, characterized in that Step d) of claim 1 comprises the following step: temporarily storing the inserted lamination stack (2) in a temporary storage element (4).

3. The method according to claim 1 or 2, characterized in that: Prior to step e) of claim 1, the insert laminated core (2) is placed in a roll changing slide (5).

4. The method according to any one of claims 1 to 3, characterized in that The first location is the preparation workshop.

5. The method according to any one of claims 1 to 4, characterized in that The position close to the rolling mill frame is the roll changing channel (6) or a position close to the roll changing channel.

6. The method according to any one of claims 1 to 5, characterized in that The method is performed to replace support rolls of the rolling mill stand.

7. A device for providing and / or transporting insert stacks (1) for support rolls and / or working rolls of a rolling mill stand, said insert stacks being required when changing the rolls, wherein: The device comprises: - a carrier frame (7) having means for coupling with a crane; and - Connecting elements (8, 9) for positively connecting the insertion laminations (1) arranged together to form the insertion lamination package (2) to the carrier frame (7).

8. The device according to claim 7, characterized in that The connecting elements (8, 9) are screws or include screws.

9. The device according to claim 8, characterized in that The two screws (8, 9) are preferably arranged diagonally on the support frame (7).

10. The device according to any one of claims 7 to 9, characterized in that A centering mechanism (10) is arranged on the carrier frame (7), and the centering mechanism centers the inserted laminated core (2) relative to the carrier frame (7).

11. The device according to any one of claims 8 to 10, characterized in that Recesses (11), preferably two recesses (11) in each case, are formed in the insert laminate (1), and the recesses correspond to the positions of the screws (8, 9).

12. The device according to any one of claims 8 to 11, characterized in that The device comprises a base plate (12) which is provided with threaded holes (13) for engaging the screws (8, 9), wherein the base plate (12) carries the insert lamination stack (2).

13. The device according to claim 12, characterized in that The length (L) of the thread of the screw (8, 9) G ) is greater than the length (L) of the threaded hole (13) in the bottom plate (12) B ), preferably 1mm to 5mm larger.

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