DE102006030934A1 - Method for changing working rolls and/or support rolls in a roll stand used in a plate rolling mill comprises using a single locomotive - Google Patents

Abstract

Method for changing working rolls (7, 8) and/or support rolls (5, 6) in a roll stand (4) comprises using a single locomotive (11). An independent claim is also included for a locomotive for carrying out the above method.

Description

The The invention relates to a method and a device for changing of rolls, in particular of work rolls and / or intermediate rolls in a rolling stand, like scaffolding or finishing stand for Rolling of heavy plate, each having support and work roll sets, by supporting one another and then Extending in the axial direction of the rollers on the operating side of the rolling stands, in a roller workshop and driving back and installing new sets of rollers.

From the WO 03/099 479 A1 is a device for the change of pairs of work rolls and / or pairs of support rollers on rolling stands known, the backup rolls 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 by means of 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 roll change chair supported thereon with an upper support roller supported. 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.

From the WO 2004/039 512 A1 is a tractor known to be pulled with the roller sets in a roller workshop WW or driven back from there. The tractor is moved by gears of the tractor engage in racks.

From the DE 43 21 663 A1 is a rolling mill with provided on the operating side of the frameworks each supported on trolleys and transverse to the roll axes slidable support plates known, which are arranged 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 whose Reason are equipped with extension rails for supporting roller sets. In this case, the pits between the stands and the support plates are overlapped in a length of each of a fixable in its initial position and for supporting roll change from this verschenkbaren flap, and that the flaps each with a the extension of sets of work rolls and convict them on one of the track pairs its associated respective support plates is equipped.

From the WO 03/015 949 A1 a device for changing the working and support rollers of a strip rolling mill is known, wherein by means of a roll carriage movable to the rolling stand, which accommodates the extracted old sets of rolls and the exchange is made possible against new sets of rolls. The device consists of a stationary on Hüttenflurhöhe arranged 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, displaceable on the roll change carriage and with this coupled so that the Ausziehwagen together with the roll change carriage is displaceable by the change cylinder transversely to the rolling stand. 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 stands, each having support and work roll sets, by supporting and then extending in the axial direction of a work roll set or a support roll set on the operator side in a roll shop and subsequent retraction and installation of new sets of rolls. In this case, the number of separate transverse transfer cars transported on the operator side of the number of rolling mills are successively spent on a single connecting track by a single locomotive in the roller workshop and then moved back from the work roll sets and at alternating distances on the respective transverse transfer carriage between the rolling stands be discontinued and that after releasing the operator side by the transverse transfer carriage each extended after a worn-out set of work rolls the worn support roller sets and brought by crane in the roll workshop, maintained, transported back and re-installed in the associated rolling stands. Further described is an associated device.

The invention is based on the object, with device technology low effort a flexible process for changing the roller sets to propose the rolling stands and a device for carrying out the method according to the invention.

These Task is inventively characterized solved, that in a method according to the preamble of claim 1, the work roll sets or the support roll sets or the working and support roller sets by means of a single locomotive from the rolling stand to the roller workshop and transported back become.

Further Embodiments of the method result from the relevant Dependent claims.

The Invention also relates a device for implementation the method according to the invention. For this purpose, the locomotive is designed with a coupling / a bearing surface, when only the work roll set, only the backup roll set or the working and support roller set from the rolling stand moved out and transported to the roller workshop.

Further Embodiments of the device result from the relevant Dependent claims.

The Invention relates to the complete roll change for work roll sets and Support roller sets with Side Shifting in the rolling hall.

Of the entire transport of the roller sets done with only one hydraulic roller change locomotive. All roll sets be out of the mill stand transported to the roller workshop or in the rolling stand.

Work roll change with side shifting (Transverse displacement)

The Work roll changing device is located on the operating side the rolling mill.

The Tasks of the work roll changer is to use used ones Working roll sets from the rolling stand and then, for example, to the roller workshop or the newly ground work roll sets the roller workshop to transport to the rolling stand.

The platforms arranged on both sides, on which the work roll sets are transported are welded, are welded Steel structures and serve as a roadway underlay in the roll change. On these platforms, the sets of work rolls are moved to move from the rolling stand to to get to the roller workshop or back into the rolling stand. On this Platforms are screwed sliding strips / slides, which as slideways for the drawbar with attached Serve work roll set. The platforms cover the same time Range of roll change pit from. They are hinged and over one Pivot held. For support the load suspension they are off the side of the foundation. Enable such platforms a work roll change with a hydraulic roll change locomotive, which is arranged in the lower region of the roll change pit.

The used work roll sets Now through the roll changing locomotive from the rolling stand to in transported the roller workshop or the new work roll sets into the mill stand.

The currently used work roll interchangeable locomotive will not more needed.

Savings compared to the conventional ones Work roll change:

• – 4 Elektromotoren, a = 50 kW
• – 4 Getriebe-Übersetzungen
• – 4 Ritzel
• – 2 Kabeltrommeln mit Kabel
• – die komplette Elektronik/Elektrozylinder
• – die Bearbeitung durch E-Lieferanten
• – die Montage usw.
• – Vorteile für den Kunden: Weniger Wartung, Hallenkran in der Walzhalle braucht nicht mehr für die Gewischte der Stützwalzensätze ausgelegt werden.

The complete work roll locomotive with all its facilities like

• - 4 electric motors, a = 50 kW
• - 4 gear ratios
• - 4 pinions
• - 2 cable drums with cable
• - the complete electronics / electric cylinder
• - processing by e-suppliers
• - the assembly etc.
• - Advantages for the customer: Less maintenance, hall crane in the rolling hall no longer needs to be designed for the wipes of the support roller sets.

One Dolly for the transport of the roller sets from the rolling hall to the roller workshop or back to the Walzhalle is no longer needed.

at The platforms result in a weight reduction of approx. 50%. Furthermore, 30 t racks with mounting material and feather keys no longer needed. The elaborate Processing on the platforms for the attachment of the racks is eliminated.

at the preparations for the back-up roll change we only for unfolding or closing the platforms of the hall crane needed. The open platforms to disturb due to their low height (width) not the hall crane operation. Removing the platforms by the hall crane is not required. There is also no room for the filing the platforms needed in the halls. Therefore time savings.

Side Shifting / Transverse Shifting in the Mill hall.

The Side shifting is in the rolling hall in the area of the roll change pit arranged. The task of side shifting is to remove the used one the rolling stand pulled set of work rolls so far from the roller center / center roll change pit to postpone until the new work roll set is positioned in roll center can be.

The Side shifting consists of a steel construction with the same sliding strips as with the platforms.

The Side Shifting is designed to have two sets of rollers - one used and a new set of rollers - on it can be positioned.

One Hydraulic cylinder drives the change car in the desired Position. The change car itself is railbound and runs on a total of 12 rollers. The rollers are each in double row thrust bearings held.

Savings on Side Shifting in the rolling hall:

Of the Change car consists of a simple bridge and can be because of the 12 rollers - on the existing hydraulic cylinder - at every back-up roll change drive laterally out of the roller change pit. An increase and decrease eliminated by the hall crane. There will be no room for that Storage in the rolling hall needed - time savings.

At the Change cars become racks with mounting material and feather keys no longer needed.

The complex Editing for the attachment of the racks and the complete change car centering eliminated.

Backup roll change

The Backup roll change device is located in the lower part of the roll change pit.

The Tasks of the back-up roll changing device are, used support roller sets the rolling stand to the roller workshop or the new support roller sets from the roller workshop to the rolling stand to transport.

The on both sides arranged platforms on which the work rolls be transported, also serve as a roadway pedestal for the backup roller changing chair. On these platforms, the backup roll changing chair is used to change back-up rolls into the mill stand drove the locomotive. The currently used work roll shuttle locomotive is not needed anymore.

Savings on the backup roll change.

The complete work roll locomotive with all its facilities will no longer needed.

Further savings:

• - Smaller Hall crane in the rolling hall.
• - The Lifting and placing the sets of rollers on the trolley to the roller workshop by the rolling hall crane accounts.
• - Of the Transport trolley with drive between rolling hall and roller workshop is not needed anymore.

Roll change locomotive for the work roll and Backup roll change.

• – 4 Hydraulik-Motoren mit Getriebe und Ritzelwelle
• – 2 Hydraulikzylinder
• – 1 Bajonett-Verschluss für den Arbeitswalzenwechsel
• – 1 Bajonett-Verschluss für den Stützwalzenwechsel

With the roll changing locomotive, the work roll and support roll sets are transported from the rolling stand to the rolling mill and / or the new sets of rolls in the rolling stand. The roller change locomotive is located in the lower part of the roller change pit and consists essentially of the housing (car body):

• - 4 hydraulic motors with gearbox and pinion shaft
• - 2 hydraulic cylinders
• - 1 bayonet lock for the work roll change
• - 1 bayonet lock for the support roller change

Hydraulic roller change locomotive

Of the Backup roll change, the work roll change and the retraction of backup roll changing chair into the mill stand done by the hydraulic roller change locomotive.

The currently used Arbeitswalzen-Wechsellokomotive is no longer needed. Even when using Side Shifting in the rolling hall or the roller workshop transports this locomotive the Stützwalzen- and stripper sets to the roller workshop or back to the rolling stand.

Savings:

• - Smaller Hallenkran
• - The Lifting and placing the roller sets on the trolley to the roller workshop by the rolling hall crane accounts.
• - The trolley with drive between rolling hall and roller workshop is no longer benö Untitled.

One embodiment The invention will be described with reference to very schematic drawings. Show it:

1 in cross-section a rolling hall with a roll stand and one of them separated by a wall roller workshop;

2 in cross section, the coupling of a locomotive to the work rolls;

3 the work rolls moved out of the rolling stand;

4 the locomotive with a set of work rolls in the final position in the roll workshop,

5 as a detail, a transverse transfer platform in the rolling hall;

6 the Querverschiebplatfform with open pit;

7 in plan view, the transverse displacement platform when pulling out of the work roll set;

8th in plan view, the transverse displacement platform in the right position for pulling out a support roller set;

9 in cross section, the rolling hall with roll changing chair;

10 Back-up rolls and roll change chair in the roll workshop;

11 Rolling workshop with support structure for receiving the work rolls;

12 as 11 but with back-up rolls;

13 in side view, facing the wall, the support structure with thereon arranged change carriage, which has downwardly directed devices for receiving the work rolls;

14 Support structure in position for receiving the removed work roll set;

15 Support structure in position to deliver a new work roll set and

16 Supporting structure with change carriage in the roller workshop when retracting a support roller set.

In 1 is a rolling hall on the left 1 in the rolling direction and on the right side a roller workshop 2 shown. Both areas are through a wall 3 separated. In a rolling stand 4 are an upper and a lower support roller 5 . 6 and upper and lower work rolls 7 . 8th arranged. For transport from the rolling stand 4 in the rolling hall 2 in the roller workshop 2 For example, to regrind the rollers becomes a locomotive 9 used. This is located in a pit 10 that the rolling hall 1 and the roller workshop 2 combines. All devices such as rails, etc. are on a foundation or several foundations 11 built up. The locomotive 9 can thus from a waiting position 12 at the right end of the pit 10 to the rolling stand 4 to be moved. In the 1A and 1B is shown in cross section, like the locomotive 9 in the pit 10 is arranged. As you can see, the pit is 10 in a lower narrow area 16 and an upper wide area 17 divided. The lower narrow area 16 is only marginally wider we the locomotive 9 , The upper wide area 17 indicates at its two edges 18 . 19 platforms 20 on. These are when pulling out or transporting a set of work rolls 7 . 8th folded down and have at their top guide rails 21 on top of which the work roll set 7 . 8th can be moved. The platforms 20 have a distance, one at the locomotive 9 at the top 13 attached coupling device 14 allows a drive through. For transporting the larger diameter support roll set 5 . 6 become the platforms 20 folded up and thus widened the passage.

In 2 is shown as by means of the coupling device 14 for example, a push rod 15 at the locomotive 9 is attached. On the other hand, a coupling to the lower work roll takes place 7 , Drives the locomotive 9 in the pit 10 to the right, become the lower stripper 7 and the upper work roll 8th from the rolling stand 4 drawn.

In 3 is shown how the work roll set 7 . 8th in the rolling hall 1 next to the rolling stand 4 for further transport. In a first embodiment, the push rod 15 from the locomotive 9 and the lower work roll 7 solved and removed. Now the locomotive 9 directly with the lower work roll 7 be coupled. By a procedure de locomotive 9 in the pit 10 the work roll set arrives 7 . 8th in the roller workshop 2 ,

The final position of the work roll set 7 . 8th in the roller workshop 2 is in 4 shown. The push rod 15 is located, for example, in a designated storage position in the rolling hall 1 ,

The removed work roll set 7 . 8th becomes replaced by a new work roll set. This is done as quickly as possible to minimize downtime of the rolling stand. Therefore, it is provided in a preferred embodiment that the new work roll set already in the rolling hall 1 is prepared. In 5 such a device is shown. The also referred to as side shifting device provides that the removed set of work rolls 7 . 8th and a new work roll set 22 parallel next to each other on a transverse displacement platform 23 can be arranged. In 5A is the removed work roll set 7 . 8th on the left. The transverse shift platform 23 lies on the right and left edge of the pit 10 on. To move, for example, a hydraulic cylinder 24 with push rod 25 used. The transverse shift platform 23 becomes medium of several roles 24 on tracks 26 method. In 5B is the position of the cross slide platform 23 presented in the new work roll set 22 into the mill stand 4 can be inserted.

To the locomotive 9 then the backup roll set 5 . 6 from the rolling stand 4 to pull, the pit must 10 be made free. For this purpose, as explained above, the platforms 20 high. Furthermore, the transverse displacement platform 23 to the right, see 6A . 6B that the left edge 24 the cross slide platform 23 the pit 10 completely releases. By the design of the transverse displacement platform 23 with several roles 24 and a corresponding length, it can rest in the transition area only on one side.

7 shows in plan view the constellation in which the transverse displacement platform 23 the pit 10 covered. In 8th is the transverse displacement platform 23 in the position where the pit 10 for removing the support roller set 5 . 6 is made free. This requires the platforms 20 with the rails still raised.

In 9 is shown as a roll changing chair 25 by means of the locomotive 9 and the push rod 15 between the lower support roller 5 and the upper back-up roll 6 is pushed. After the roll change chair 25 between the back-up rolls 5 . 6 is arranged, this complete unit by means of the locomotive from the rolling stand 4 drawn. At a stopover, the push rod 15 expanded. Then there is a direct coupling of the locomotive 9 to the lower support roller 5 , The locomotive 9 pulls the complete unit into the roller workshop 2 , as in 10 to see. Here are the platforms 20 along the right and the left edge of the pit 10 folded up to a clearance for the above-mentioned unit of support rollers 5 . 6 and roll change chair 25 as well as locomotive 9 to have.

In 11 is shown an education in which the work rolls 7 . 8th directly into the roller workshop 2 to be pulled. The platforms 20 have been folded down to allow you to drive over. In the roller workshop 2 there is a support structure 26 , which simplifies the handling during the processing of the individual working and support rollers. As can be seen, are the work rolls 7 . 8th in the supporting structure 26 method.

12 shows the same view, but with back-up rollers 5 . 6 ,

The support structure 26 is in 13 shown in more detail. The support structure 26 consists of a left part 27 and a right part 28 , At the top 29 are rails 30 arranged, on which a change carriage 31 rests. The change car 31 has devices on its bottom 32 for receiving the work rolls 7 . 8th on. The change car 31 with the devices 32 is by means of a hydraulic cylinder 33 and a push rod 34 moved laterally.

In a first position, as in 14 shown, a used work roll set 7 . 8th in the devices 32 picked up and raised, ie from the locomotive 9 hitched. This is the change car 31 on the left part 27 and the right part 28 the support structure 26 on.

Subsequently, a revised / new work roll approach 35 . 36 who is already in the device 32 is moved to the left and thus gets in flight with the locomotive 9 , is on the platforms 20 lowered with the rails and into the rolling stand 4 (not shown) pushed as in 15 to see. The support structure 26 with the change car 31 and the devices located thereon 32 to accommodate the work rolls makes it possible to dispense with a hall crane.

This in turn is in the handling of the support rollers, as in 16 to see needed. To the back-up rolls in the roll workshop 2 to spend, is the change car 31 with the devices 32 so rightly proceed that a gap 33 between the left part 27 and the right part 28 the support structure 26 arises. In this gap 33 the support roller set can be pulled by means of the locomotive. By a special design of the exchange car 31 with several roles 36 and a corresponding length can fill the gap 33 be released.

• 1. Arbeitswalzenwechselvorrichtung mit aufklappbaren Plattformen und Side Shifting (Querverschiebung) in der Walzhalle Zeichnung Nr. 20808700, 17.1–17.5
• 2. Side Shifting (Querverschiebung) in der Walzhalle für Arbeitswalzenwechselvorrichtung Zeichnung Nr. 20808701, 18.1–18.5
• 3. Eine Lokomotive für den gesamten Walzenwechsel (AW- und StW-Wechsel) mit Side Shifting (Querverschiebung) in der Walzhalle oder in der Walzenwerkstatt Zeichnung Nr. 20808702, 19.1–19.6
• 4. Side Shifting (Querverschiebung) in der Walzenwerkstatt für Arbeitswalzenwechselvorrichtung Zeichnung Nr. 20808703, 20.1–20.6
• 5. Arbeitswalzenwechselvorrichtung mit aufklappbaren Plattformen und Side Shifting (Querverschiebung) in Walzenwerkstatt Zeichnung Nr. 20808704, 21.1–21.6

New complete AW and StW change with only one locomotive and with side shifting (transverse shift) in the rolling hall or in the roller workshop

• 1. Work roll changing device with unfolded rigid platforms and side shifting in the rolling hall drawing no. 20808700, 17.1 - 17.5
• 2. Side shifting in the rolling mill for work roll changing device Drawing No. 20808701, 18.1 - 18.5
• 3. A locomotive for the entire roll change (AW and StW change) with side shifting (transverse displacement) in the rolling hall or in the roll workshop Drawing no. 20808702, 19.1 - 19.06
• 4. Side shifting in the roller workshop for work roll changing device Drawing No. 20808703, 20.1 - 20.6
• 5. Work roll changing device with hinged platforms and side shifting (transverse displacement) in roll workshop Drawing No. 20808704, 21.1 - 21.6

1

mill hall

2

Roll workshop

3

wall

4

rolling mill

5

lower supporting roll

6

upper supporting roll

7

lower Stripper

8th

upper Stripper

9

locomotive

10

pit

11

foundation

12

waiting position

13

top

14

coupling device

15

pushrod

16

narrow Area

17

wider Area

18

edge

19

edge

20

platform

21

guide rail

22

Work rolls

23

Transverse displacement platform

24

roll

25

Roll changing frame

26

support structure

27

left part

28

right part

29

top

30

rails

31

change car

32

contraption

33

gap

34

pushrod

35

Work rolls

36

role

Claims (11)

Method for changing rolls, in particular of work rolls and / or intermediate rolls in a roll stand, such as roughing or finishing stand for rolling heavy plate, each having support and work roll sets, by supporting and then extending in the axial direction of the rollers on the operating side of the rolling stands, in a rolling mill and retracting and installing new sets of rolls, characterized in that the work roll sets or the support roll sets or the working and support roll sets are extended by a single locomotive from the rolling stand or retracted into the rolling stand. Method according to claim 1, characterized in that that locomotive with work rolls or back-up rolls or the working and back-up rolls is moved to the roller workshop. Method according to claim 1, characterized in that that the locomotive directly or indirectly by means of a push rod with the working and / or support rollers is coupled. Method according to claim 1, characterized in that that the work rolls in the rolling mill in a support structure be retracted with movable on changing car. Method according to claim 1, characterized in that that at the change carriage at least one device for receiving and for lifting a work roll set. Method according to claim 5, characterized in that that the change car only on a right part of the support structure rests and a gap for the Retracting a support roller set leaves. Method according to claim 1, characterized in that that provided in the rolling hall a transverse displacement platform is that covers a pit for extending a work roll set and for extending a support roller set the pit releases. Method according to claim 1, characterized in that that when moving out a set of work rolls from the rolling stand, the platforms with the guide rails attached thereto be folded down to move on the work roll set and in which the platforms are folded up when moving out of Supporting roll set. Device for changing rolls, in particular work rolls and / or intermediate rolls zen in a rolling stand, such as roughing stand or finishing stand for rolling heavy plate, each having support and work roll sets, by supporting and then extending in the axial direction of the rollers on the operating side of the rolling stands, in a roll workshop and retracting and installing new sets of rolls. characterized in that a locomotive is formed with a coupling / support surface for coupling a work roll set and with a coupling / support surface for coupling a support roll set. Device according to claim 9, characterized in that that the coupling is designed as a bayonet closure. Device according to claim 9 or 10, characterized that locomotive with hydraulic motors, gearbox and pinion shaft is trained.