EP0432532B2 - High performance bar or wire rolling mill - Google Patents

Abstract

In a high-performance bar or wire rolling mill, especially for the single-strand twist-free rolling of rolling stock, with a roughing train 1 having in each case a plurality of roll stands or roll units, at least one intermediate train 2 and an adjoining finishing train 3 with a subsequent finishing block 4 if required, it is proposed that roll changing be carried out in accordance with the minimised sequence of passes in each mill section, the changing of the rolls in the roughing train 1 being carried out with crane tools 15, in the intermediate train 2 with manipulators 16 and in the finishing train 3 by means of rapid-change devices 17 and in addition by means of manipulators 16 if required, all the roll stands or roll units in the individual mill sections 1 to 4 having removable rolls 18, 31, 32, 46 in floating mounts in order to increase the availability and output of the rolling mill. <IMAGE>

Description

The invention relates to a high-performance steel bar / wire mill, especially for the single-core twist-free Rolling rolling stock.

The development of wire rod production took place in in recent years through the use of new technologies like Morgan block and Stelmor coolers very stormy. So the maximum speed can be increased from approx. 35 m / s to over 100 m / s; the tapping cross sections of 80 mm in diameter up to 150 mm diameter and the ring weights could be tripled. The consequence of this Development is that from four / three-wire to two or three single core road with all advantages regarding the Spreading and exploitation of the production facilities could be passed over. For the arrangement of the roll stands it can be stated that with normal steel qualities especially when planning multi-core rolling for both the thoroughfare as well as for the intermediate road Horizontal arrangement was chosen. At this The arrangement must be between the Scaffolding being twisted. The demands placed on it to the surface qualities and tolerances leave such an approach in most cases to.

In cases where higher requirements are placed, the intermediate streets are many split and with scaffolding in a horizontal-vertical arrangement with appropriate facilities for train-free Rolling equipped This is particularly important for the Generation of Garret dimensions with a good surface and tolerance.

For medium and high-alloy steels and grades with special surface quality is used for the entire Rolling mill a horizontal-vertical arrangement used, since these qualities usually do not swirl allow more. In addition, it should be mentioned that to achieve a perfect surface quality largely roller guides between the scaffolding starts.

Depending on the wire qualities to be rolled also developed various twist-free prefabricated block types. The individual horizontal-vertical rolling units of the finished block have overhung carbide rolling rings.

The current state of technical development of wire strands can be said that this more and more to the special needs of the operators must be interpreted, because it is the degree of utilization to improve the wire rod and the respective Product programs easier to adjust, application to increase and the high-tech quality of To secure the product.

In the company's prospectus number 2000.03.86 Danieli and C. Buttrio, IT with the title "ESC" Rolling units will be an "ESC block" with so-called "Cantilever" described. In this company brochure it is mentioned that the ESC block as a roughing stand, as an intermediate stand or used as a finishing stand can and that depending on the application different Possibilities for changing the rolling rings exist, for example with a semi-automatic device, which is carried by a crane. Furthermore, from the "sandwich" unit of the ESC block semi-automatically for a crane be replaced, the sandwich unit in the next to the rolling mill Workshop was prepared. On page 5 of the above Company brochure is also on a roller changing car referenced the sandwich unit between the workshop and the scaffolding.

The object of the invention is the individual road sections optimize the steel bar / wire mill, in particular to increase their availability, the wire or the steel bars without twists in all road sections to roll and the system costs through the optimized Use of roll stands with certain specified Reduce properties.

This task is accomplished with a high performance steel bar / wire mill of the type designated in claim 1 solved. Further designs of the high-performance rolling mill are by claims 2 to 5 characterized.

According to claim 1, the roll change takes place the high-performance steel bar / wire mill according to specifications the minimized caliber series in each street section in the roughing line using crane tools, in the intermediate street using a manipulator and in the Finishing line using quick-change device if necessary. additionally with manipulator, whereby all roll stands or rolling units in the individual road sections have overhung rollers. The interpretation of the entire rolling mill with roll stands or rolling units with flying roller shafts on which the roller rings be raised, allows short change times, i.e. long conversion times are not necessary, so that the road is almost always ready for rolling. There are no interchangeable scaffolding required. Due to the fact that the roll change according to the minimized Caliber series is provided, the roll change according to frequency and necessity taking into account the wear condition and quality assurance, with the respective on best suitable and the change process optimal adapted and taking into account the roll weight Exchange devices are used. The The result shows a rolling of the rolling stock in the entire rolling mill with high availability and a rolled product with high quality and quality.

Furthermore, according to claim 1 for the purpose of swirl-free rolling of the rolling stock the rough and intermediate line in alternating order horizontal-vertical compact frameworks on. The finishing train consists of Rolling direction first seen from horizontal-vertical compact stands, followed by a vertical and Horizontal rolling unit having a roll block, the Horizontal rolling unit exclusively for separating rolling of the rolling stock in two separate rolling cores can be used during its vertical rolling unit Normal rolling of the rolling stock can be used. This The layout of the individual road sections has several Advantages: The required space for the scaffolding is minimized. The entire length of the rolling mill will reduced because the compact frameworks are closer together can be positioned; they are not roller tables either required between the scaffolding. Because of the Standardization of the optimized roll change will the stock of spare parts is low. The changeover times are shortened. The proposed one is particularly advantageous Use of a two-stand vertical-horizontal mini-block with overhung rollers as a replacement for the tilting and rotating scaffolds previously used, if, for example, the single-strand rolled stock to be subjected to a separation roll. Because in In the case of separation rolling of the rolling stock, only the horizontal rolling unit is used the scaffolding for the separating stitch in use, while in the case of normal rolling only Vertical unit is in operation. The other rolling unit you just let it run empty or it will appropriate roll cassette removed.

According to the further features of the claim 1 are the horizontal-vertical mill block for the last passes of the separating roll two duo roll stands with the rolling sequence from oval caliber to round caliber downstream. So is the horizontal rolling unit of the Horizontal-vertical blocks in the finishing train for Separating rolls of the rolling stock uses the vertical rolling unit of the rolling block does no rolling work each strand of the rolling stock cut into two rolling veins in the horizontal stands using rollers Rolled two calibers so far that the formed one Rolled material then as finished bar steel can be driven onto the cooling bed.

The entire rolling mill is therefore too in the case of separating rolling with overhung roller rings be equipped. There are also carbide rolling rings can be used with a long service life. The set-up times or the maintenance times of the rolling mill can go even further be reduced. The use of the compact scaffolding leaves one short in the sense of a reduced space requirement Construction of the finishing train.

To set-up times or maintenance times in the Reduce Vorstraße or this section of street in The availability will increase after another Proposal of the invention for changing the rolling rings at least the horizontal compact scaffolding a C-shaped angled, pivotally attached to a crane bridge Carrier tool used on the lower The focus is on a common changing device is arranged for the rolling rings. Because the rolling rings quite a heavy weight in this section of road about 150 to 450 kilograms, on the other hand one comparatively long lifespan of several Days at the maximum permissible rolling capacity, is the use of the roller changing device proposed here of rolling technology in the roughing mill optimally adapted, both in terms of construction Effort as well as the time commitment of the Changing device.

The same advantages can be seen in the intermediate street, if there in appropriate adaptation to the Rolling technology the overhung rolling rings of the Scaffolding using a manipulator that can be moved on all sides be changed, the head of which is the changing device for the rolling rings of the compact stands and which is manually controllable. Because in this section of the road the weights of the rolling rings compared to those are already significantly reduced in the Vorstraße, on the other hand, their average lifespan is reduced, a changing device is therefore provided, which is easy to use by maintenance personnel and a correspondingly quick and exact change of the processed rolling rings against new rolling rings allows.

The advantage of changing the rollers becomes particularly clear according to the minimized caliber series in every street section in the finishing train, if there according to a further proposal of the invention Quick change device is used, the one designed to be liftable and rotatable, and optionally displaceable and on a moveable change car arranged changing device for the two corresponding rolling rings of each vertical and Horizontal framework. The rolling rings in these sections of the road are among other things because of the high rolling speed heavily burdened and despite the best Material selection such as tungsten carbide only an average lifespan of about one to two days under maximum rolling performance. The need to fast and accurate as well as controllable from a control room The invention is proposed with the roll change Quick change device in everyone Respectful. Another improvement the invention provides that the roller changing device at least two about their axis of rotation pivotable receiving devices for at least one has the mounting rings receiving the rolling rings. As a result, the maintenance personnel Possibility offered new rolling rings on a building site ready for installation, which in the receiving device the mobile changing device be used. After that, the receiving device panned accordingly and the processed Rolling rings are on the site for further handling discontinued. Then the change car drove back into the road section. The individual processes when changing the roller can with common control or Control elements completely be automated.

To optimize the roll change in the finishing train it is intended that in the mounting frame Rolling fittings can be used as well as the corresponding ones Roll rings are fixable in the operating position. hereby there is an even more complete pre-assembly the site, which is ultimately the roll change times additionally shortened and increased availability of these road sections leads the total Availability of the entire steel bar / wire mill improved. In this sense, it is also appropriate if according to a further proposal of the invention, the front panel Centering and clamping pieces has for fixation of the mounting frame on the front plate of the compact scaffold. A mounting frame designed in this regard will be described in the specific description below explained.

Figur 1

das Lay-Out der Walzstraße als Erläuterung nicht jedoch die erfindungsgemäße Walzstraße,

Figur 2

gemäße Wulzetraje die Fertigwalzstraße im Falle des Trennwalzens mit zwei Horizontal-Duo-Gerüsten,

Figur 3

die Fertigwalzstraße im Falle des Trennwalzens mit zwei Vertikal-Horizontal-Walzblökken, als Erläuterung, nicht jedoch die erfindungsgemäße Walzstraße,

Figur 4

die Walzenwechselvorrichtung für die Vorstraße,

Figur 5

die Walzenwechselvorrichtung für die Zwischenstraße,

Figur 6

die Walzenwechselvorrichtungfürdie Fertigstraße,

Figur 7

den Montagerahmen für die Walzenwechselvorrichtung nach Fig. 6.

The invention is described with reference to schematic drawings for a high-performance steel bar / wire mill. Show it:

Figure 1

the layout of the rolling mill as an explanation but not the rolling mill according to the invention,

Figure 2

according to Wulzetraje the finishing mill in the case of separating rolling with two horizontal duo stands,

Figure 3

the finish rolling train in the case of separating rolling with two vertical-horizontal rolling blocks, as an explanation, but not the rolling train according to the invention,

Figure 4

the roll changing device for the roughing train,

Figure 5

the roller changing device for the intermediate line,

Figure 6

the roll changing device for the finishing train,

Figure 7

the mounting frame for the roller changing device according to FIG. 6.

In Fig. 1 is the high-performance bar / rolling mill shown with the Vorstraße 1, which from side by side Roll stands arranged in the rolling line with the Framework sequence horizontal (H) / vertical (V) exists, followed from the intermediate street 2, which also from side by side arranged rolling stands with the stand sequence Horizontal (H) / Vertical (V), which is the finishing train 3 is subordinate. The finishing street 3, which is the intermediate street in wire production, follows Prefabricated block 4 with the cooling device, not shown mostly consisting of a water cooling section with driver / winding layer and the Stelmor system. In the case of rolling rod production, the finishing train follows 3 a cooling or storage bed 6.

2 and 3 show an enlarged detail partly the finishing train 3, on which on three roll stands with the scaffolding sequence Horizontal / vertical / horizontal a rolling block 7 follows from two rolling units in the sequence vertical / horizontal consists. The vertical / horizontal roll block 7 are 2, two horizontal duo scaffolding 8 arranged downstream. The rollers 9 of these duo stands each have at least two calibers 10, 11. It’s easy to see that in the horizontal roller unit 7 '' of the roll block 7 a separation rolling of the rolling stock 12 from a single one Roll train on two roll trains 12 ', 12' ' takes place and each of these rolling strands in the two following Horizontal stands 8 of an oval / round rolling is subjected. It should be noted that in the case the separating rolling, the vertical rolling unit 7 'of the rolling block 7 runs along empty or that the corresponding roller cassette is removed. 3 it is shown that in the case of separation rolling of the rolling stock 12 with the help the horizontal rolling unit 7 ″ of the rolling block 7 two two-stand rolling blocks 13, 14 are arranged downstream, specifically for each roll strand 12 'or 12' ' Rolling block 13 and 14, respectively. Each rolling block 13, 14 has two rolling units 13 ', 13 "; 14', 14" in the rolling sequence Vertical / Horizontal.

Through the vertical / horizontal rolling block 7 in the Finishing line 3 are usually at this point used tilting or rotating scaffolds replaced. Through the Vertkal / horizontal roll blocks 13, 14 are the ones shown in Fig. 2 horizontal duo scaffolding shown replaced.

All mill stands in particular on the rolling mill 1 in connection with FIG. 3 have flying mounted shafts on which the rolling rings be raised. This opens up the possibility of Roll change according to the minimized caliber series in every section of the road and in the roughing line using crane tools (Fig. 4), in the intermediate street using manipulators (Fig. 5) and in the finishing train using quick-change devices (Fig. 6).

4, the crane tools 15 exist Changing the roller rings 18, in particular the horizontal stands (Fig. 4) in the Vorstrasse 1 from a C-shaped designed carrier tool 19, which on a Crane bridge 20 is pivotally suspended. In the lower one The center of gravity of the carrier tool is one handwheel-operated roller changing device 21 arranged, which the corresponding rolling rings 18th of the mill stand together. This is a Lever system 22 with an end projection 23 provided, which in the caliber 24 of the rolling rings 18th engages when the handwheel is turned and thus the guide nut 25 is moved longitudinally. The roller changing device 21 'for the rolling rings of the vertical stands can, for example, in the usual training from the ropes a crane can be lifted (Fig. 4b). In the simplest Execution, it is also possible that the crane ropes can be attached directly to the rolling rings (Fig. 4c).

Figure 5 shows the use of a manipulator 16 for Changing the rolling rings 31, 32 of a vertical compact stand 33 (Fig. 5a) or a horizontal compact structure 34 (Fig. 5b) in the intermediate street 2. Der Manipulator 16 is attached to a carrier bridge 26, and to a hydraulic system, not shown connected. The manipulator mostly consists of Joint systems 27, 28 so that the head 29 of the manipulator, the changing device 35 for the rolling rings 31, 32 carries, is movable on all sides. The head 29 of the Manipulator 16 is by means of a control lever 30 from Operating personnel controllable in every direction of movement, so that the rolling rings 31, 32 from the respective roll stand be deducted in the shortest possible time and against new rolling rings 31 'or 32' can be exchanged, who store prepared on site 36.

For changing the rolling rings 46 in the finishing train 3, a quick-change device 17 is provided, which is shown in Fig. 6. The Quick change device 17 consists of a change car 37 by a piston-cylinder linkage 38 on a conventional rail arrangement between the Roll stands 42, 43 and a construction site 39 can be moved is. The changing device has a lifting and rotating configured receiving device 40, its possibilities of movement is shown with arrows and which 6a two diametrically opposite roller carriers 44, each with a receiving opening 41 at least for the corresponding ones Rolling rings 46 of the vertical compact stand 42. The one The receiving opening can then be the processed rolling rings of the rolling stand 42 while the other receiving opening the new ones prepared on site 39 Rolling rings takes up. The receiving device 40 for the Roll rings of the horizontal compact stand 43 is 6b designed somewhat differently by the two opposite roller carrier 44 on the change car according to the movement arrow so far can be moved so that there is enough space for mounting or disassembly of the rolling rings occurs when the receiving device 40 on the change car accordingly is rotated.

A particularly advantageous mounting system is in Fig. 7 shown, namely a mounting frame 45, which in the receiving openings 41 of the quick-change device 17 in Fig. 6 can be used. In the mounting frame 45 are the corresponding rolling rings 46, 46 'in the installed position and thus fixed in the operating position. Moreover are the rolling fittings in the mounting frame 47, 47 'of the inlet and outlet side are firmly inserted. The The rolling rings are fixed in the installation position with With the help of a usual and therefore not shown Lever system, the mounting hook 48, 48 'on Scope of each rolling ring or on the caliber of Rolling ring are created for safe positioning. On the front plate 52 are centering pieces 49 and Clamping devices 50 are provided. These measures are used for centering and fixing the mounting frame on the front panel of each Compact stand of finishing train 3. With the help of the assembly frame 45 according to FIG. 7 is that shown in FIG. 6 Quick change device for the rolling rings even more effectively used.

It could be shown that with the claimed Measures the availability of a steel bar and Wire rolling mill with high output and excellent Product quality could be increased, if primarily roll stands in all road sections or rolling units with overhung shafts and removable roll rings are used and if the design of the roll changing devices precisely on the need and frequency the roll changing conditions.

List of reference numbers

1

roughing

2

between road

3

finishing line

4

finishing block

5

cooling road

6

Cooling / laying bed

7

billet

7 '

Vertical roller unit

7 "

Horizontal rolling unit

8th

Horizontal two-high stand

9

roll

10

Oval-caliber

11

Round pass

12

rolling

12 '

Walzgutstrang

12 "

Walzgutstrang

13

billet

13 '

Vertical roller unit

13 "

Horizontal rolling unit

14

billet

14 '

Vertical roller unit

14 "

Horizontal rolling unit

15

crane tool

16

manipulator

17

Quick change device

18

roll ring

19

carrier tool

20

crane bridge

21

changing device

21 '

changing device

22

lever system

23

head Start

24

caliber

25

lead nut

26

girder bridge

27, 28

joint system

29

Manipulator head

30

control lever

31, 32

roll rings

33

Vertical compact stand

34

Horizontal-compact stand

35

Roll changing device

36

Building Site

37

change car

38

Piston-rod

39

Building Site

40

recording device

41

receiving opening

42

Vertical compact stand

43

Horizontal-compact stand

44

roll carriers

45

mounting frame

46, 46 '

roll rings

47, 47 '

roll fittings

48

mounting hooks

49

centering

50

clamping device

51

axis of rotation

52

front panel

Claims (5)

1. High capacity bar and wire rolling mill, particularly for twist-free rolling of roll stock (12), with a roughing train (1 ), at least one intermediate train (2) and an adjoining finishing train (3) optionally with a following finishing block (4) each comprising several roll stands or roll units, wherein in accordance with the minimised groove sequence in each train section the roll change in the roughing train (1) is effected by means of a crane tool (15), in the intermediate train (2) by means of a manipulator (16) and in the finishing train (8) by means of a quick-change device (17) and optionally also by means of a manipulator, and all roll stands or roll units in the individual train sections (1, 2, 3, 4) have overhung mounted, removable rolls (18, 31, 32, 46), wherein further the roughing and intermediate trains (1, 2) have horizontal stands and vertical stands (H-V) in alternating sequence for the purpose of twist-free rolling of the stock (12) to be rolled and the finishing train (3) consists, seen in rolling direction, at least of horizontal stands and vertical stands (H-V) followed by a roll block (7) comprising a vertical roll unit and a horizontal roll unit (V-H), the horizontal roll unit (H) of which is usable exclusively for the rolling separate of the roll stock (12) into two separate bars (12', 12" ) whilst the vertical roll unit (V) of which is usable for normal rolling of the roll stock, and wherein two two-high roll stands (8) with the roll sequence of oval groove to round groove are arranged downstream of the vertical-horizontal roll block (7) in the finishing train (3) for the last pass of the rolling separate in the finishing train.
2. Rolling mill according to claim 1, characterised thereby that a carrier tool (19), which is bent to be C-shaped, is pivotably attached to a crane bridge (20) and at the lower centre of gravity of which is arranged a common exchange device (21) for the roll collars (18) at least of the horizontal stands, can be brought into action in the roughing train (1), wherein a manipulator (16), which is movable in all directions, is manually controllable and the head (29) of which carries the changer device (35) for the roll collars (31, 32) of the stands (33, 34), is arranged in the intermediate stand (2), and wherein a changer device (17), which is equipped to be raisable and rotatable and optionally slidable and is arranged on a movable changer carriage (37), for the two corresponding roll collars (46) of one of each vertical and horizontal stand (42, 43) can be brought into action in the finishing train (3).
3. Rolling mill according to claim 1 or 2, characterised thereby that the roll change device (17) comprises two receiving equipments (40), which are pivotable about the rotational axis (51) of the device, for a mounting frame (45) receiving at least the roll collars.
4. Rolling mill according to claim 3, characterised thereby that the roll fittings (47) are insertable into the mounting frame (45) and the corresponding roll collars (46, 46') are fixable in operating position.
5. Rolling mill according to claim 3 or 4, characterised thereby that the front plate (52) has centring and clamping members (49, 50) for fixing the mounting frame (45) on the front plate (52), of the compact stand (42, 43).

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