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

Abstract

A method relates to providing shims for backup and/or work rolls of a rolling mill stand. The shims are required when changing over rolls. The method comprises the steps of: a) assembling at least one shim, preferably at least two or three shims, into an shim pack at a first location remote from the rolling mill stand; b) transferring the shim pack into a carrier element at the first location; c) transporting the carrier element together with the shim pack from the first location to the location near the rolling mill stand; d) removing the shim pack from the carrier element at the location near the rolling mill stand; e) using the shims when changing over rolls.

Claims

1.-13. (canceled)

14. A method for providing shims (1) for backup and/or work rolls of a rolling mill stand, the shims (1) being required when changing over rolls, wherein the method comprises: a) assembling at least two shims (1) into a shim pack (2) at a first location remote from the rolling mill stand; b) inserting the shim pack (2) into a carrier element (3) at the first location, wherein the carrier element (3) comprises a carrier frame (7), wherein the carrier frame (7) comprises means for coupling the carrier frame (7) with a crane, wherein the carrier frame (7) comprises screws (8, 9) for positively connecting the at least two shims (1) combined into the shim pack (2) to the carrier frame (7), wherein recesses (11) corresponding to positions of the screws (8, 9) are formed in the shims (1), wherein the at least two shims (1) are arranged on a base plate (12) for carrying the shim pack (2), wherein the base plate (12) includes threaded holes (13) for engagement of the screws (8, 9); c) transporting the carrier element (3) together with the shim pack (2) from the first location to a second location near the rolling mill stand; d) removing the shim pack (2) from the carrier element (3) at the second location; and e) using the shims (1) when changing over the backup and/or work rolls.

15. The method according to claim 14, wherein removing the shim pack (2) from the carrier element (3) comprises intermediately storing the shim pack (2) in an intermediate storage element (4).

16. The method according to claim 14, further comprising placing the shim pack (2) into a roll changeover carriage (5) prior to using the shims (1) when changing over rolls.

17. The method according to claim 14, wherein the first location is a preparation workshop.

18. The method according to claim 14, wherein the second location is a roll changeover pit (6) or a location directly adjacent thereto.

19. The method according to claim 14, wherein the method is carried out for changing backup rolls of the rolling mill stand.

20. A system, comprising: shims (1) that are required when changing backup and/or work rolls of a rolling mill stand, the shims (1) being assembled into a shim pack (2); and a device for providing and/or transporting the shims (1), wherein the device comprises a carrier frame (7) including means for coupling the carrier frame (7) with a crane, screws (8, 9) for positively connecting the shims (1) combined to the shim pack (2) to the carrier frame (7), and a base plate (12) for carrying the shim pack (2), the base plate (12) having threaded holes (13) for engagement of the screws (8, 9), wherein recesses (11) corresponding to positions of the screws (8, 9) are formed in the shims (1).

21. The system according to claim 20, wherein the screws (8, 9) are two screws (8, 9) arranged diagonally on the carrier frame (7).

22. The system according to claim 20, further comprising centering means (10) arranged on the carrier frame (7), wherein the centering means are designed for centering the shim pack (2) relative to the carrier frame (7).

23. The system according to claim 20, wherein the recesses (11) include two recesses (11) formed in each of the shims (1).

24. The system according to claim 20, wherein a length (L.sub.G) of a thread of the screws (8, 9) is greater than a length (L.sub.B) of the threaded holes (13) in the base plate (12).

25. The system according to claim 20, wherein a length (L.sub.G) of a thread of the screws (8, 9) is greater than a length (L.sub.B) of the threaded holes (13) in the base plate (12) by 1 mm to 5 mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawing shows an exemplary embodiment of the invention. The following are shown:

[0042] FIG. 1 shows a plurality of shims combined to form a shim pack, which shims rest on the base plate of a carrier element.

[0043] FIG. 1a shows the enlargement of a part of the base plate.

[0044] FIG. 2 shows a carrier element that is currently receiving a shim pack.

[0045] FIG. 2a shows the enlargement of a part of the carrier element, namely centering means, in interaction with the shim pack.

[0046] FIG. 3 shows the carrier element that has received the shim pack, wherein this is fixed to the carrier element by means of screws.

[0047] FIG. 3a shows the enlargement of a part of the base plate with a screwed-in screw.

[0048] FIG. 4 shows the carrier element that receives a shim pack.

[0049] FIG. 5 shows an intermediate storage element that has a plurality of, namely four, receptacles for shim packs.

[0050] FIG. 6 shows the part of a rolling mill stand with a roll changeover carriage and a roll changeover pit, wherein the intermediate storage element is arranged next to the roll changeover pit.

[0051] FIG. 6a shows the receiving of a shim pack by means of the carrier element.

[0052] FIG. 7 shows the transport of a new shim pack from the intermediate storage element to the roll changeover carriage.

[0053] FIG. 8 shows the arrangement in accordance with FIG. 7, wherein a new shim pack is still located in the intermediate storage element and a further new shim pack is already placed in the roll changeover carriage.

[0054] FIG. 9 shows the roll changeover carriage loaded with two new shim packs and two old shim packs arranged in the intermediate storage element.

DETAILED DESCRIPTION

[0055] FIG. 1 shows four shims 1 that have been combined to form a shim pack 2. The shims 1 are required for changing over the backup rolls of a rolling mill stand. For this purpose, the shims 1 are prepared in a preparation workshop (which is located at some distance from the rolling mill stand and is not shown in the figures) and then transported (by overhead crane) to the rolling mill stand, where they are needed for the roll changeover. The shim pack 2 rests on a base plate 12, which is (so to speak, temporarily) part of a carrier element 3, which is provided for transporting the shims 1. On the other hand, the entire pack consisting of the shims 1 and the base plate 12 is mounted in the rolling mill stand, such that the base plate 12 then remains part of the pack 2.

[0056] FIG. 1a shows that the base plate 12 has a recess in its lower region, into which a shim part is placed, which is fitted with a threaded hole 13. Screws 8, 9 are screwed into the threaded hole 13, which screws secure the shim pack 2 to the carrier element 3. In order to achieve this reliably, the individual shims 1 have recesses 11, in which the shafts of the screws 8, 9 come to rest if they are screwed into the base plate 12. The two recesses 11 per shim 1 are provided diagonally, as shown in FIG. 1.

[0057] FIG. 2 shows how the carrier element 3 grasps a shim pack 2, in order to receive and transport it. The carrier element 3 consists of a carrier frame 7, which can be coupled to an overhead crane (not shown in the figures).

[0058] A plurality of centering means 10 (six in the exemplary embodiment) are fastened to the carrier frame 7, which are designed as rods extending in a vertical direction, which have an insertion slope 14 in the lower end region, as can be seen in FIG. 2a.

[0059] FIG. 3 shows how the carrier element 3 has grasped a shim pack 2 and the latter is firmly (positively) connected to the carrier element. For this purpose, the 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 FIG. 1a). The shim pack 2 is secured relative to the carrier element 3 by the recesses 11 (see FIG. 1).

[0060] Problems occasionally arise because the underside of the shim pack 2 and in particular the base plate 12 is held to the substrate by adhesion. In order to avoid this, the length of the thread L.sub.G of the screws 8, 9 is designed to be longer than the length of the threaded hole L.sub.B, as shown in FIG. 3a. This makes it possible to press the underside of the base plate 12 away from the substrate by screwing in the screws 8, 9 accordingly, thus eliminating adhesion effects.

[0061] FIG. 4 shows once again how the carrier element 3 has grasped a shim pack 2 located beneath it. It is then transported (by overhead crane) to an intermediate storage element 4, which is shown in FIG. 5. In the exemplary embodiment, the intermediate storage element 4 has four receptacles 15 for the respective shim packets 2. FIG. 5 shows how two of the receptacles 15 (namely the two middle receptacles) are in each case loaded with a new shim pack 2, wherein the carrier element 3, which has just moved a shim pack 2 into the receptacle 15 of the intermediate storage element 4, is shown here again.

[0062] FIGS. 6 to 9 show various stages that illustrate the sequence of providing new shim packs 2 for the roll changeover of a backup roll of a rolling mill stand, wherein the new shim packs 2 replace the old shim packs 2. The old shim packs 2 are transported away from the rolling mill stand/the roll changeover carriage.

[0063] FIG. 6 initially shows the intermediate storage element 4 with the loading of two new shim packs 2 (as shown in FIG. 5). The intermediate storage element 4 is located directly adjacent to a roll changeover pit 6, on which a roll changeover carriage 5 is arranged. In FIG. 6, the roll changeover carriage 5 is still fitted with two used shim packs 2, which have been removed from the rolling mill stand. The gripping of a shim pack 2, either from the intermediate storage element 4 or from the roll changeover carriage 5, is illustrated once again in FIG. 6a.

[0064] FIG. 7 shows how a new shim pack 2 is transported from the intermediate storage element 4 to the roll changeover carriage 5. The intermediate storage element 4 is still loaded with a new shim pack 2 and already loaded with a used shim pack 2.

[0065] FIG. 8 shows how the new shim pack 2 was moved into the roll changeover carriage 5. At this stage, the exchange of the old shim packs 2 for new shim packs 2 has taken place for half of one side of the rolling mill stand (the drive side or the operating side).

[0066] Finally, FIG. 9 shows how the two old shim packs 2 were moved into the intermediate storage element 4, while the two new shim packs 2 are placed in the roll changeover carriage 5.

[0067] Depending on requirements, the intermediate storage element 4 can be positioned either to the side or behind the roll changeover pit 6 by overhead crane.

[0068] Through the described arrangement and procedure, the logistics for supplying the rolling mill stand/the roll changeover carriage with new shim packs can be simplified, consequently significantly reducing the number and duration of crane trips.

LIST OF REFERENCE SIGNS

[0069] 1 Shim [0070] 2 Shim pack [0071] 2 New shim pack [0072] 2 Old shim pack [0073] 3 Carrier element [0074] 4 Intermediate storage element [0075] 5 Roll changeover carriage [0076] 6 Roll changeover pit [0077] 7 Carrier frame [0078] 8 Connecting means (screw) [0079] 9 Connecting means (screw) [0080] 10 Centering means [0081] 11 Recess in the shim [0082] 12 Base plate [0083] 13 Threaded hole [0084] 14 Insertion slope [0085] 15 Receptacle for a shim pack [0086] L.sub.G Length of the thread [0087] L.sub.B Length of the threaded hole