CN1694771A - Rolling mill comprising support plates - Google Patents

Abstract

The invention relates to a rolling mill comprising support plates (2) which are provided on the operating side (BS) of the stands (F1-Fi) and can be displaced transversally in relation to the axes of the rolls, said support plates being embodied in such a way that they can receive sets of working rolls (4) and are located adjacent to the mill floor level (7) for transporting and delivering the working rolls (4). Said rolling mill also comprises trenches (10) which are respectively arranged upstream from the stands (F1-Fi) on the operating side (BS), the base (11) of said trenches being used to deliver sets of back-up rolls (9). The aim of the invention is to reduce the delivery paths of the working rolls during replacement. To this end, a transport device (12) is associated with the support plates (2) and transports the respective support plates (2) back and forth between a position for replacing the working rolls, wherein the support plates (2a) are arranged directly next to the roll stands above the trenches (10), and a position for changing the working rolls, wherein the support plates (2c) are arranged below the mill floor level (7) next to the trench region.

Description

Rolling mill with support plate

The invention relates to a rolling mill having a support plate or platform which is arranged on the working side of a rolling stand and which is movable transversely to the rolling mill axis. In order to change the work roll sets by lateral movement and thereby accommodate the work roll sets of the rolling stands, the support plate is also specially equipped with a pair of rails and is adjacent to the floor of the rolling shop to be able to transport and output the work rolls roll. In addition, a trough is provided in front of the rolling stand, the bottom of which is specially equipped with an escaping rail for escaping the back-up roll pack.

DE 43 21 663 A1 discloses a rolling mill with a laterally movable, that is to say movable support plate along or opposite to the rolling direction. The groove provided between the rolling stand and the transversely movable support plate line overlaps with the rotatable cover. For the replacement of the work rolls the covers are horizontal, and for the replacement of the back-up rolls the covers expose the groove by means of a pivoting movement so that the back-up roll pack can be moved in. The work rolls are drawn by tractors from the rolling stand through the cover to the support plate, wherein both the cover and the support plate are provided with corresponding pairs of rails. A new set of work rolls resting on a parallel pair of rails on each support plate is followed by the lateral movement of the support plates to the front of the rolling stand and is driven into the stand. The haul-off machine can take up the used work roll set—possibly after several lateral movements of the support plate—and drive it into the rolling shop.

In such known rolling mills with grooves between the stand and the individual support plates which can be closed by covers, the work rolls must each be driven into the support plates via the covers. The transverse movement and the exchange of the work rolls take place only on the support plate, so that the strokes are relatively long and correspondingly time-consuming.

Based on this background art, the object of the present invention is to provide a rolling mill in which work rolls can be changed in a relatively short time sequence.

This task is achieved by a device with the features of claim 1 . Further preferred refinements are described in the dependent claims.

The core idea is to lower the laterally displaceable support plate by means of a conveying device from a position for changing work rolls through a groove transverse to the rolling direction in the direction of the console to an adjacent one below the rolling shop floor. area and into a position for changing the back-up rollers, and back up. In the position of the work rolls the support plate rests against the rolling stand and itself forms the upper closure of the groove. The transverse displacement device is arranged directly in front of the rolling mill train. The travel of the work rolls can thus be minimized, so that the time required for changing the work rolls can be minimized. Between a first position and a second position, the support plates sink obliquely downwards through the groove region, wherein the support plates maintain their orientation during the conveying movement. In said first position the support plate is arranged directly above the trough next to the mill stand, in said second position the support plate is arranged in front of the trough below the rolling shop floor (viewed from the console).

The conveying device for conveying the support plate can be, for example, a drive-out lifting platform, which completes the lowering of the support plate below the rolling shop floor and exits the groove area necessary for the support plate roll set driving movement.

According to a particularly preferred embodiment, the conveying device comprises a trolley with rollers. The support plate itself is arranged displaceably towards a platform of the trolley so as to allow lateral movement along the line of the support plate. At the bottom of each groove there is provided a bevel which rises in the direction of the rolling stand. This trolley/incline concept demonstrates that the conveyor device is easy to change over and is not susceptible to disturbances.

A particularly advantageous solution is proposed in that the carriage is moved by means of the same piston-cylinder unit. This unit is also used to transport backup roller sets at the bottom of the trough. This makes it unnecessary to provide a further drive for the conveying device.

In order to be able to convert the horizontal force movement of the piston-cylinder-unit into the upward movement of the ramp, the piston or a beam extending the piston is rotatably connected to a support rod, the other end of which is rotatably supported on the trolley on the underside of the platform.

In order to move the support plates laterally in the position for changing the work rolls, these support plates are especially pressed. For this purpose, the individual support plates do not need to be connected to each other, but move one after the other.

The invention will be described in detail below with the aid of the drawings. These figures show:

Fig. 1 is a side view of a rolling mill with a rolling stand and a support plate line with sinkable and operable support plates arranged next to it;

Figure 2 is a top view of the rolling mill according to Figure 1;

Figure 3 B-B sectional view of Figure 1, and has a support plate at the work roll replacement position;

Figure 4 A-A sectional view of Figure 1, with a support plate at the replacement position of the support roll.

1 and 2 show a rolling mill with here seven finishing stands F1-F7. On the operating side BS of the machine frame line (AS designates the opposite driving side), a support plate line 1 consisting of transversely displaceable support plates 2 is arranged next to one another. Each support plate 2 is equipped with a pair of rails 3 arranged along the rolling axis. In the stage shown in the drawing, a used working roll set 4' is pulled onto a support plate 2a, while a new working roll set 5 is already waiting to be put into use directly on the respective immediately adjacent support plate 2b, and by Transversely or linearly transported to the corresponding mill stand.

It can be clearly seen from FIG. 2 that the support plate 2 adjoins the rolling shop floor 7 with its end 6 pointing outwards from the rolling stand. The floor is also equipped with a pair of tracks (not shown) for conveying and outputting the working roll sets 4, 5, with corresponding tractors 8 (see Figures 3 and 4). The conveying by means of traction machine 8 can be carried out, for example, according to the disclosed method of DE 43 21 663 A1, according to which the gear of the traction machine engages in the rack along the track. Alternatively, the function of the tractor can also be performed by a hydraulic cylinder.

The details of the invention are explained below with reference to FIGS. 3 and 4 .

Each trough 10 is arranged on the operating side BS directly adjacent to a rolling stand Fi with a set of work rolls 4 and a set of backup rolls 9 or in the direction of the operating table. The bottom 11 of the trough is equipped with run-out rails (not shown) for the support roller set 9 . As shown in FIG. 3, this groove 10 is covered by a support plate 2 in the position for changing the work rolls. The support plate 2 covers the groove 10 evenly between the rolling stand Fi and the adjacent rolling shop floor 7 . The tractor 8, which feeds and unloads the work roll group 4, can be driven directly over this rolling shop floor 7 to the support plate 2. The used working roll sets 4" can be drawn directly via corresponding rails into the rolling workshop WW, or can be driven back from there again. The support plate 2 itself is conveyed to the level shown in FIG. 3 by means of a conveyor device 12 In the position, and be kept there.This conveying device 12 of trolley 13 form mainly is made up of a platform 14 and two roller pairs 15a, b arranged on it here.Platform 14 itself has on its upper surface 16 Track 17 (see figure 2). This track extends transversely to the rolling mill axis and forms a line when it touches the platform. The support plate 2 has corresponding rollers 18 which can travel along these tracks for lateral movement In order to prevent lateral tilting, a guide 19 is provided between the underside of each support plate 2 and the upper side 16 of the platform.In the position shown in Figure 3, the trolley 13 is located at two angles of about 20° for example. In the terminal position above the beveled pair 20a, b or the pair of wedges.

Figure 4 shows the position of the support plate 2 for changing the support rolls. Since the groove is completely filled by the lower part of the support roller set 9 , the support plate 2 sinks obliquely into a region 21 adjacent to the groove region 10 . For this purpose, the trolley 13 is driven along the inclined planes 20 a, b away from the rolling stand Fi below the rolling shop floor 7 , the corresponding guide cam 22 supporting this travel movement. The guide cam 22 prevents a lateral movement of the platform 14 during the lowering movement and in the lowered position.

The movement of the trolley 13 and of the support plate 2 is carried out by means of a piston-cylinder unit 23 which also brings about the movement of the support roller set 9 . A beam extending the piston or an adapter 24 is connected to the support roller set 9 and moves it into the groove 10 by a horizontal movement along the run-out track and returns after the support roller has been changed. Simultaneously with the roll-out of the support roller set 9 , the trolley 13 is moved from the raised position into the lowered position below the rolling shop floor 7 . Thus, a connecting rod 25 acts on the trolley and pulls this trolley from the ramp into the sunken support plate. Wherein, the connecting rod 25 is rotatably arranged in the middle of the lower side of the platform 14 . A cover 31 is provided at one end of the floor of the rolling mill adjacent to the tank 10 .

In order to move the rollers 15a, b of the trolley 13 up and down on the ramps 20a, b, the front pair of ramps 20a and the rear pair of ramps 20b are arranged offset. In particular, the run-out line along the wedge-shaped track 30 can be seen in the top view of FIG. 2 . For example, the support plate 2c assigned to the second finishing stand F2 is moved out sideways, ie transversely to the rolling direction; while all other support plates 2 are shown in the work roll changing position. For the sake of clarity, on the support plate 2 c of the first rolling stand F1 , the withdrawn working roll set 4 and the new working roll set 5 arranged next to it are shown.

Preferably the carrier plates are not connected to one another, but are arranged next to each other. These support plates are reciprocated by means of pressure units 26a, b acting on one end of the support plate line 1, respectively. To this end, the support plate 2 rolls along a pair of rails 17 inserted into the platform 14 of the trolley 13 . Lateral guide rollers rolling along guide units 19 arranged on the platform 14 prevent tilting. Assigned to each carrier plate 2 is an adjustment unit 28 whose position can be variably adjusted. With the aid of this adjustment unit, the individual support plates 2 in the position for changing the work rolls can be adjusted corresponding to a rolling stand F1. In the embodiment shown, the pressure-cylinder-piston units 26 a, b are covered by a cover plate 29 (see FIG. 1 ).

With the proposed solution it is possible to position the backing plate line directly next to the finishing stand and to have short transport paths for the work rolls. In order to open the groove covered by the support plate, the support plate is moved by means of a conveying device through a lowering movement and a displacement movement. The replacement of the work rolls is accomplished by lateral movement of the support plate, which is sunk and moved in the direction of the console for replacement of the support rolls.

List of Reference Signs

1. Support plate line

2. Support plate

3. Track pair

4. Work roll set (4’ and 4” are used work rolls)

5. New working roll set

6. End of support plate

7. Rolling workshop floor

8. Tractor

9. Backup roller set

10. Groove

11. Tank bottom

12. Conveying device

13. Trolley

14. Platform

15. Roller (roller pair 15a, 15b)

16. The upper side of the platform

17. Tracks in the upper side of the platform

18. Roller

19. Guide device

20. Inclined surface (inclined to 20a, 20b)

21. The area adjacent to the groove area

22. Guide cam

23. Piston-cylinder-unit

24. Beam

25. Connecting rod

26. Mobile units, especially pressure units (unit pairs 26a, 26b)

27. Side guide roller

28. Adjustment unit

29. Cover plate

30. Wedge track

31. Cover

F1-F7(Fi) precision rail rack

BS Operation side

AS drive side

WW rolling shop

Claims (7)

1. have on the fore side (BS) of the rolling-mill housing of being arranged on (F1-Fi), and transverse to the milling train axis ground rolling mill of support plate (2) movably, described support plate is used to hold working roll group (4), and this support plate next-door neighbour mill terrace (7), be used for carrying and output services roller (4), and this rolling mill also has the groove (10) that is separately positioned on rolling-mill housing (F1-Fi) front on fore side (BS), the bottom of this groove (11) is used to make backing roll group (9) to roll away from, it is characterized in that, a conveying device (12) is attached troops to a unit in support plate (2), this conveying device is used to change a position that is used to change working roll and one between the position of backing roll carries each support plate (2), in the described position that is used to change working roll, support plate (2a) near rolling-mill housing be arranged on the top of groove (10); On the position of described replacing backing roll, support plate (2c) sinks to the zone setting of the below of mill terrace (7) near groove.

2. according to the described rolling mill of claim 1, it is characterized in that, conveying device (12) comprises a dolly (13) that has roller (15), a support plate (2) laterally is set on this dolly movably, and roller (15) concurs with the inclined-plane (20) that is arranged on the bottom (11) of each groove (10), wherein dolly (13) can drive to inclined-plane (20) from the position of the below of mill terrace (7), therefore and can drive in the position of a raising in the groove (10), and support plate (2a) be closed with mill terrace (7) in the final position that is used for changing working roll.

3. according to claim 1 or 2 described rolling mills, it is characterized in that, the place ahead and the roller rear of dolly (13) to (15a, 15b) and corresponding inclined-plane to (20a, b) setting with being misplaced.

4. according to each described rolling mill in the claim 1 to 3, it is characterized in that dolly (13) and a piston-cylinder-unit acting in conjunction are so that move between described two positions.

5. according to the described rolling mill of claim 4, it is characterized in that described piston-cylinder-unit is backing roll replacing-piston-cylinder-unit (23).

6. according to the described rolling mill of claim 5, it is characterized in that, run to the inclined-plane to (20a in order to support dolly (13) to rise, b), the crossbeam (24) that the described piston of backing roll replacing-piston-cylinder-unit (23) or one prolong this piston is connected with an end of a connecting rod (25), and this connecting rod is arranged on the dolly (13), particularly is arranged on the centre with its other end.

7. according to each described rolling mill in the aforementioned claim, it is characterized in that, adjacent support plate (2) unclamps ground and is arranged on working roll by ground each other and changes in the position, and generally is separately positioned on mobile unit (26) on support plate (1) end along supporting printed line (1) or can in one direction or can passing by two on other direction with it.

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