EP1951453A1

EP1951453A1 - Method and device for changing/transporting rolls

Info

Publication number: EP1951453A1
Application number: EP07711324A
Authority: EP
Inventors: Gerhard Blecher
Original assignee: SMS Demag AG
Current assignee: SMS Siemag AG
Priority date: 2006-01-09
Filing date: 2007-01-09
Publication date: 2008-08-06
Anticipated expiration: 2027-01-09
Also published as: US8522590B2; EP1954416B1; US8201431B2; ES2321668T3; KR101078258B1; RU2394661C2; US20120180285A1; US8522591B2; DE502007000562D1; RU2378064C1; ATE428515T1; WO2007080086A1; JP2009522111A; JP4988763B2; JP5344928B2; ATE428514T1; US8555688B2; WO2007080088A1; KR20080077004A; KR101102907B1

Abstract

The invention relates to a method for changing rolls, in particular, working rolls and/or intermediate rolls in a roll stand, such as a roughing down stand or finishing stand for rolling thick sheet iron. Said rolls comprise back up roller sets and working roller sets. One individual locomotive mechanism is used for changing the working rolls and/or for changing the back up rolls and/or for inserting or withdrawing a roll changing seat by supporting the rolls on each other and subsequently withdrawing in the axial direction of the rolls on the operational side of the roll stand, from a roll hall in a roll workshop and back and for installing novel roll sets. The invention also relates to a device for carrying out said method.

Description

Method and device for changing / transporting rolls

The invention relates to a method and a device for changing / transporting a first set of rollers and a second set of rollers on a displacement platform and a displacement platform.

From WO 03/099 479 A1 a device for the change of pairs of work rolls and / or pairs of support rollers on rolling stands is known, wherein the support rollers and the work rolls are each guided in raised or lowered chocks in the stand frame, the pair of work rolls supported on the chocks a Geradschubantriebs is extendable. The pair of support rollers can be extended or retracted by means of a lower support roller supported on a guide track and wheels and a roller change-over chair supported thereon with an upper support roller supported on it. In this case, the pair of work rolls on the drive side of the roll stand with a dimensioned for the expansion or the installation path in the stroke length hydraulic piston-cylinder drive can be coupled and disengaged in the Ausfahrabstand. Furthermore, a retracted in the altitude between the support rollers roll changing chair to the same piston-cylinder drive can be coupled and after supporting the upper support roller and the roll changing chair on the lower support roller extendable or retractable the backup roller pair. A corresponding method is known from this.

WO 2004/039 512 A1 discloses a tractor, with which roller sets are pulled into a roller workshop WW or driven back therefrom. The tractor is moved by gears of the tractor engage in racks.

From DE 43 21 663 A1 discloses a rolling mill with provided on the operating side of the scaffolds supported on each carriage and transverse to the roll axes slidable support plates are known, which are provided with at least two juxtaposed, provided for receiving mounted on rollers sets of work rolls rail pairs, and with each of the scaffolds upstream pits, the bottom of which are equipped with Ausfahrschienen for support roller sets. In this case, the pits between the stands and the support plates in a length of each of a fixed in its initial position and the support roll change out of this are pivotable flaps are covered, and that the flaps each with an extension of sets of work rolls and convict them on one of the track pairs its associated respective support plates is equipped.

WO 03/015 949 A1 discloses a device for changing the working and support rollers of a strip rolling mill, wherein the roller change carriage, which can be displaced transversely to the rolling stand, receives the withdrawn old roller sets and makes replacement with new roller sets possible. The device consists of a stationary arranged on Hüttenflurhöhe change cylinder, the piston rod is transversely to the rolling stand and extendable, a Ausziehwagen, which is arranged at the front end of the piston rod of the change cylinder, slidably on the roll change carriage and coupled with this, that the Ausziehwagen to - Is slid transversely to the roll stand together with the roll changing car through the change cylinder. Furthermore, a roller change carriage arranged in the transverse displacement table, which is displaceable transversely to the direction of movement of the roller change carriage by a roll changing car independent displacement cylinder and through which the exchanged roller sets in and out of the frame center aligned (n) change position can be brought. Furthermore, an associated method will be described.

WO 2005/089 972 A1 describes a method for changing sets of rolls in rolling mills of a rolling mill having a plurality of rolling mills, which each have supporting and work roll sets, by supporting one another and then extending in the axial direction of a set of work rolls or a support roller set on the operator side in a roller workshop and subsequent retraction and installation of new sets of rollers. In this case, the number of separate transverse transfer cars transported on the operator side of the number of rolling mills are transported on a single connecting track following one another by a single locomotive into the roller workshop, from where the work roll sets are returned and at alternating distances to the respective transverse transfer carriage be set between the rolling stands and that after releasing the operator side by the cross slide each after a developed worn Arbeitswalzen- set the worn support roller sets extended and brought by crane in the roller workshop, maintained, transported back and re-installed in the associated rolling stands. Further described is an associated device.

The invention has for its object to propose a flexible method for changing / transporting the sets of rollers in the rolling hall at device complexity and a device for performing the method according to the invention.

This object is achieved in that in a method according to the preamble of claim 1 when changing / transporting the first and second set of rollers, the displacement platform completely spans / covers a roll change pit. When pulling out the used set of work rolls from the rolling mill on the Verschiebeplatt- form on which a new set of work rolls is already arranged, the sliding platform is on both sides of the roll change pit on rails, whereby tilting / tilting of the sliding platform is prevented.

Further embodiments of the method will become apparent from the dependent claims. The invention also relates to a device for carrying out the method according to the invention. According to the invention, the device is designed as a displacement platform, wherein the displacement platform is designed to run on two rails arranged in parallel, in order to accommodate both the first, used set of work rolls and the second set of work rolls. By an arrangement of rails on both sides of the roll change pit, the sliding platform is guided and stored horizontally even after the span / cover the roll change pit.

Further embodiments of the device will become apparent from the dependent claims.

The work roll changing device is located on the operating side of the rolling mill. The task of the work roll changing device is to pull used work roll sets out of the roll stand and, for example, subsequently to transport them to the roll workshop or to transport the newly ground work roll sets from the roll shop to the rolling mill stand.

The transverse displacement of the sets of rolls, also called side-shifting, is arranged in the roll hall in the region of the roll change pit. The task of the transverse shift is to move the used set of work rolls pulled out of the roll stand so far out of the roll center / center roll change pit until the new work roll set can be positioned in the roll center.

The sliding platform consists of a steel structure with the same sliding strips as on the platforms. The sliding platform is designed so that two sets of work rolls - a used and a new set of rolls - can be positioned on it. A hydraulic cylinder moves the sliding platform to the desired position. The relocation platform itself is rail-bound. and runs in a preferred embodiment on a total of twelve rollers, which are each held in double-row thrust bearings.

The sliding platform according to the invention consists of a simple bridge and can be due to the rollers, by means of the hydraulic cylinder, drive laterally from the roll change pit at each backup roll change to release the entire width of the roll change pit. The support roller set or the support rollers with the chocks can be transported without interference by the displacement platform by means of a locomotive from the rolling stand through the roll change pit in the rolling hall in the roll workshop. An assembly and removal of the sliding platform by the hall crane is eliminated. Furthermore, no space for the storage of the sliding platform in the rolling hall is needed. This leads to a high time savings.

Racks with mounting material and feather keys are no longer needed on the change car. The elaborate machining for the attachment of the racks as well as the complete change carriage centering is eliminated.

An embodiment of the invention will be described in more detail with reference to very schematic drawings. Show it:

Fig. 1 in cross section a rolling hall with a rolling mill and one of them separated by a wall roller workshop;

Fig. 2 as a detail a sliding platform in the rolling hall;

3 shows the sliding platform with open pit;

Fig. 4 in plan view, the sliding platform when removing the

Set of work rolls; and Fig. 5 in plan view, the sliding platform in the right position for pulling out a support roller set.

In Figure 1, a rolling hall 1 in the rolling direction and on the right side of a rolling mill 2 is shown on the left side. Both areas are separated by a wall 3. In a rolling mill 4, an upper and a lower support roller 5, 6 and an upper and a lower work roll 7, 8 are arranged. For transport from the roll stand 4 in the rolling hall 2 into the roll workshop 2, for example, to reground the rolls, a locomotive 9 is used. This is located in a roll change pit 10, which connects the rolling hall 1 and the roll workshop 2. All devices such as rails, etc. are built on a foundation or several foundations11. The locomotive 9 can thus be moved from a waiting position 12 at the right end of the roll changing pit 10 to the rolling mill 4. In the figures 1A and 1B is shown in cross-section how the locomotive 9 is arranged in the roll change pit 10. As can be seen, the roll change pit 10 is divided into a lower narrow area 16 and an upper wide area 17. The lower narrow region 16 is only marginally wider than the locomotive 9. The upper wide region 17 has platforms 20 at its two edges 18, 19. These are folded down when pulling or transporting a set of work rolls 7, 8 and have at their top guide rails 21 on which the set of work rolls 7, 8 can be moved. The platforms 20 have a spacing which allows a coupling device 14 attached to the locomotive 9 on the upper side 13 to pass through. For transporting the larger diameter support roll set 5, 6, the platforms 20 are folded up, thus widening the passage.

The removed work roll set 7, 8 is replaced by a new work roll set. This is done as quickly as possible to minimize downtime of the rolling stand. It is therefore foreseen that the new work roll already prepared in the rolling hall 1. FIG. 2 shows such a device. The device, also referred to as side shifting, provides that the removed set of work rolls, consisting of the work rolls 7, 8, and a new set of work rolls 22 can be arranged parallel to one another on a transverse displacement platform 23. In Figure 2A, the removed work roll set is on the left side. The displacement platform 23 rests on the right and left edges of the roll change pit 10. To move, for example, a hydraulic cylinder 28 is used with push rod 25. The displacement platform 23 is moved by means of several rollers 24 on rails 26. FIG. 2B shows the position of the displacement platform 23 in which the new work roll set 22 can be inserted into the rolling stand 4.

In order to subsequently pull the support roller set, consisting of the support rollers 5, 6, out of the roll stand 4 with the locomotive 9, the roll change pit 10 must be cleared. For this purpose, as explained above, the platforms 20 are raised. Furthermore, the displacement platform 23 is moved so far to the right, see Figure 3A, 3B that the left edge 27 of the transverse displacement platform 23, the roller change pit 10 completely free. Due to the design of the displacement platform 23 with a plurality of rollers 24 and a corresponding length, it can rest in the transition region only on one side.

FIG. 4 shows a plan view of the constellation in which the displacement platform 23 covers the roll change pit 10. In FIG. 5, the displacement platform 23 is in the position in which the roller change pit 10 for the extraction of the support roller set 5, 6 is cleared. For this purpose, the platforms 20 with the rails still have to be raised or folded up. LIST OF REFERENCE NUMBERS

1 rolling hall

2 roller workshop

3 wall

4 rolling stand

5 lower support roller

6 upper support roller

7 lower work roll

8 upper work roll

9 locomotive

10 roll change pit

11 foundation

12 waiting position

13 top

14 coupling device

15 push rod

16 narrow area

17 wide range

18 edge

19 edge

20 platform

21 guide rail

22 work roll set

23 shift platform

24 rollers

25 push rod

26 rail

27 left edge

28 hydraulic cylinders

Claims

claims

1. A method for changing / transporting a first set of rollers (7, 8) and a second set of rollers (22) on a sliding platform (23) in the region of a roll stand (4) in a rolling hall (1), in or against the rolling direction , characterized in that when changing / transporting the first and second Waiz- zensatzes (7, 8, 22), the sliding platform (23) completely spans / covers a roll change pit (10).

2. The method according to claim 1, characterized in that when moving out of the support rollers (5, 6) from the rolling stand (4), the sliding platform (23) the roll change pit (10) completely releases.

3. The method according to claim 1 or 2, characterized in that the displacement platform (23) on rails (26) is moved, which are identical to the guide rails (21) of the platforms (20).

4. The method according to claim 3, characterized in that the displacement platform (23) by at least one hydraulic cylinder (28) with push rod (25) is moved.

5. Apparatus for carrying out a method according to claims 1 to 4, characterized the sliding platform (23) is designed to ride on two rails (26) arranged in parallel.

6. Apparatus according to claim 5, characterized in that the displacement platform (23) is formed in two rows with six rollers (24).

7. The device according to claim 5, characterized in that the rollers (24) are formed in each held double row thrust bearings.

8. Device according to one of claims 5 to 7, characterized in that the displacement platform (23) is designed as a steel construction.