EP1581355B1 - Method and plant for rolling and subsequent reeling of metal strip in particular steel strip - Google Patents

Abstract

Steel strip issues continuously from a downstream end of a rolling line and can be wound up there on a coiler. An inspection table downstream of the rolling line has a surface aligned with the downstream end and the strip emerging therefrom. The coiler is below a plane of the table surface. During normal rolling the strip is deflected downward to the coiler and reeled up. For inspection of the strip, the strip is cut transversely to produce a new leading end and is fed starting at this end toward the table without substantial deflection. Then the strip is cut again upstream of the new leading end to form a strip sample separate from the strip emerging from the rolling line, which sample is fed to the table and arrested and inspected while strip emerging from the line is deflected back down to the coiler to continue coiling it up.

Description

The invention relates to a method and a system for rolling and subsequent reeling of metal strip, in particular steel strip, on at least one rotationally driven, expandable coiler mandrel, wherein the metal strip is examined in longitudinal sections on rolling anomalies.

From practice a carousel reel with a separate inspection line is known. The steel strip emerging from the rolling train is wound into coils. For strip inspection it is necessary to remove a whole coil from the material flow and to investigate for rolling defects. This study is very time consuming and economically disadvantageous. On the one hand, there is little accessibility and, on the other hand, the cause of a rolling anomaly can only be eliminated with a delay. There is therefore also a considerable loss of time, in which the production continues with the errors.

Carousel winding systems with paired reel mandrels are known (EP 0 812 634 B1). However, such a construction is not directly related to an inspection line.

In another carousel reel with two reel mandrels (EP 1 039 978 B1), a suitable design of the drive for the reel mandrels is proposed.

Another embodiment of a carousel reel with two reel mandrels (EP 0 773 178 B1) also relates to the design of the drives for the reel mandrels, so that the assignment of an inspection line to the coiler station is not taken into account here either.

The invention has for its object to provide a method for rolling and subsequent reeling of metal strip, in particular of steel strip, and a system that allows an economical and rapid inspection of tape samples in the continuous rolling process.

The stated object is achieved in that the tape sample inside the rolling line "inline" on a lower reel station passed away on an inspection table for a free insight and stopped. As a result, significant advantages over a separate inspection method are obtained outside the rolling line: In an inspection section, a metal sheet is transported directly to the inspection table, so that sources of error in the rolling process can be detected faster. In addition, only one tape sample in the form of the metal sheet is needed and not a whole coil from the material flow. This provides a short access time to perform the quick inspection. The investment of an additional inspection reel as well as a winding trolley can be saved.

The rolling process is advantageously supported according to further features in that after cutting the tape sample, the new beginning of the tape is directed downwards, under the inspection table and wound onto an upper coiler mandrel or a lower coiler mandrel. This process takes place without interrupting the continuous rolling process.

One embodiment is that the tape samples are braked by belt conveyors that are integrated in the inspection table.

It is then particularly advantageous that a wound on the upper coiler mandrel winding coil is pivoted during the continuous rolling operation by 180 ° and wound to a predetermined maximum collar diameter.

The handling of finished wound coils can then be improved by lowering coiled wound coils down on the lower coiler mandrel
and extended parallel to the coiler mandrel axis. In this case, the Wikkelbunde can be lowered directly via a winding collar lifting device.

The part of the invention relating to the plant is based on a system for rolling and subsequent reeling of metal strip, in particular steel strip, which is arranged behind a rolling line, to the last rolling stand, and with an inspection device for the investigation of the metal strip equipped on rolling anomalies.

This object is achieved by device technology and according to the invention in that the coiler station is arranged below the plane of an inline to the rolling line inspection table on which a tape sample can be viewed freely.

The steel strip emerging from the last rolling stand can be guided such that a deflection unit for deflecting the metal strip on at least one coiler mandrel is provided at the entrance to the coiling station.

The metal strip can be distributed at a residual length on the two reel mandrels, according to a further embodiment, the reel station is formed from a respectively below the plane of the inspection table eccentrically arranged within a rotating frame upper coiler mandrel and a lower coiler mandrel.

A switching of the reel mandrels by 180 ° is also achieved in that the upper coiler mandrel and the lower coiler mandrel lie on a running through the center axis of the rotary frame diametrals and are pivotable through 180 °.

As tests have shown, it is particularly advantageous that the diametral extends at an angle to the horizontal of about 15 ° to 25 °.

The 180 ° rotation is achieved in such a way that the rotating frame for the reel mandrels is mounted on rotationally driven support rollers.

Furthermore, the winding on the lower coiler mandrel can be further improved by the fact that the lower coiler mandrel is associated with a pressure roller which can be pivoted in or out with a pressure roller.

In the drawing, an embodiment of the invention is shown, which will be explained in more detail below.

Fig. 1

eine Seitenansicht der Haspelstation mit Inspektionslinie,

Fig. 2

dieselbe Seitenansicht der Haspelstation mit Inspektionstisch in vergrößertem Maßstab und

Fig. 3

eine weiter vergrößerte Darstellung der Haspelstation.

Show it:

Fig. 1

a side view of the coiler station with inspection line,

Fig. 2

the same side view of the coiler station with inspection table on an enlarged scale and

Fig. 3

a further enlarged view of the coiler station.

In a rolling train, such as a Conti rolling mill, metal strip 1, in particular steel strip 1, behind the last rolling stand 2 of the rolling line 2a, due to tape samples la with a few meters in length, to deviations (anomalies), eg in the surface, the geometry , on thickness differences, ripples u. Like. Checked. The discontinued device arranged for this purpose consists successively of a thickness gauge 3, an edge profile measuring device 4, a flatness measuring roller 5, a guide table 6, a first drive roller assembly 7, a drum shears 8 for cutting the tape sample 1 a, a second drive roller assembly 9 and a Ablenkaggregat 10. Die Continuing rolling line 2a, an inspection table 11 is arranged. As soon as the drum shears 8 receives signals for cutting, the tape sample 1a is created "inline" within the rolling line 2a and moves over a lower reeling station 18 onto the inspection table 11 and is for free viewing stopped at a belt stop device 12. The belt sample 1a is braked by belt conveyor 17, which are integrated in successive inspection tables 11.

In the course of tape samples 1a are further transported by means of a third drive roller assembly 13 in a pair of scissors 14, cut in the cuts and pass through a chute 15 in a scrap car 16. The transport drive of the tape samples 1a by means of the belt conveyor 17. For securing during the tape inspection, the belt stop device 12 is pivoted.

In Fig. 2, the coiler station 18 is shown larger. This has a belt winder pivoting frame 19, which is pivotable about a pivot axis 19b by means of a separate hydraulic pivot drive 19a. In the coiler station 18, an upper coiler mandrel 20 and a lower coiler mandrel 21 are rotatably driven. The upper coiler mandrel 20 is surrounded by two belt winder arms 22. The belt winder arms 22 can be swung out or in through a hydraulic belt winder arm pivot drive 26 (see also Fig. 3).

After cutting the tape sample 1a of the new tape beginning is directed downwards by means of the deflection unit 10 and under the inspection table 11 and wound on the upper coiler mandrel 20 or on the coiler mandrel 21. The rolling process is not interrupted by the respective cutting process.

A wound on the upper coiler mandrel 20 winding collar 25 is pivoted during the continuous rolling operation by 180 ° and wound to a predetermined maximum collar diameter 25a finished.

The wound on the lower coiler mandrel 21 wound coils 25 are lowered by means of a winding coil lifting device 24 and transported on a winding conveyor Ausfahrwagen 23 parallel to the coiler mandrel axis.

In Fig. 2 and Fig. 3 is further drawn that at the entrance 27 to the coiler station 18, the deflection unit 10, the metal strip 1 from the rolling line 2 a at a desired angle to the coiler mandrel 20 and / or 21 bends. In addition to the belt winder pivoting frame 19, a rotating frame 28 is provided in the coiling station 18 in which the reel mandrels 20 and 21 are rotatably mounted and driven. The reel mandrels 20 and 21 are eccentric to the center axis 28a of the rotary frame 28 at equal intervals on the diametrical. The rotating frame 28 is supported on support rollers 29, which are rotationally driven. The diametral runs to the horizontal at an angle of about 15 ° to 25 °.

A winding collar 25 (Figure 3) can be wound with a maximum collar diameter 25a. In the area of the lower coiler mandrel 21, a hinged pressure roller arm 30, which carries a pressure roller 31 at its front end, is located on the housing of the coiler station 18. The pressure roller arm 30 can be pivoted back and forth from the position shown in thick solid lines in a drawn with thin, dashed lines working position.

LIST OF REFERENCE NUMBERS

1

Metal band, steel band

1a

band practice

2

(last) rolling stand

2a

rolling line

3

thickness gauge

4

Edge profile measuring device

5

Flatness roll

6

guide table

7

first traction roller unit

8th

rotary shear

9

second traction roller unit

10

deflecting unit

11

inspection table

12

Band stop device

13

third drive roller aggregate

14

scissors

15

slide

16

scrap vehicles

17

Belt conveyors

18

coiling station

19

Belt wrapper swing frame

19a

(hydraulic) quarter turn actuator

19b

swivel axis

20

upper coiler mandrel

21

lower coiler mandrel

22

Belt wrapper arm

23

Wound coil off carriage

24

Wound coil lifting device

25

wound coil

25a

maximum collar diameter

26

(hydraulic) belt winder arm swivel drive

27

Entrance to the reel station

28

rotating frame

28a

Center axis of the rotating frame

29

support rollers

30

Pressure rollers arm

31

capstan

Claims (12)

1. Method of rolling and subsequent reeling up of metal strip (1), particularly of steel strip (1), on at least one rotationally driven, spreadable reeling mandrel (20), wherein the metal strip (1) is checked in length sections for anomalies in rolling, characterised in that the strip sample (1a) within the rolling line (2a) is conducted 'in-line' past a reeling station (18), which is disposed deeper than the rolling line (2a), onto an inspection table (11), and stopped, for free inspection.
2. Method according to one of claims 1 and 2, characterised in that after cutting of the strip sample (1a) the new strip start is guided downwardly below the inspection table (11) and wound up on an upper reeling mandrel (20) or a lower reeling mandrel (21).
3. Method according to claim 2, characterised in that the strip samples (1a) are braked by belt-band conveyors (17) integrated in the inspection table (11).
4. Method according to one of claims 1 to 3, characterised in that a wound coil (25) wound up on the upper reeling mandrel (20) is pivoted through 180° during continuous rolling operation and is wound to finished state to the predetermined maximum coil diameter (25a).
5. Method according to one of claims 1 to 4, characterised in that wound coils (25) reeled on the lower reeling mandrel (21) are lowered downwardly and moved out parallel to the reeling mandrel axis.
6. Plant for rolling and subsequent reeling of metal strip (1), particularly of steel strip (1), with an outlet device, which is arranged behind a rolling train, adjoining the last roll stand (2), and is equipped with an inspection device for checking the metal strip (1) for anomalies in rolling, characterised in that the outlet device comprises a reeling station (18), wherein the reeling station (18) is arranged below the plane of an inspection table (11), which extends 'in-line' with respect to the rolling line (2a) and on which a strip sample (1a) can be freely inspected.
7. Plant according to claim 6, characterised in that a deflecting unit (10) for deflecting the metal strip (1) to at least one reeling mandrel (20; 21) is provided at the inlet (27) to the reeling station (18).
8. Plant according to one of claims 6 and 7, characterised in that the reeling station (18) is formed from a respective upper reeling mandrel (20) arranged below the plane of the inspection table (11) eccentrically within a rotary frame (20) and a lower reeling mandrel(21).
9. Plant according to claim 8, characterised in that the upper reeling mandrel (20) and the lower reeling mandrel (21) lie on a diameter extending through the centre axis (28a) of the rotary frame (28).
10. Plant according to claim 9, characterised in that the diameter extends at an angle relative to the horizontal of approximately 15° to 25°.
11. Plant according to one of claims 8 to 10, characterised in that the rotary frame (28) for the reeling mandrels (20; 21) is mounted on rotationally driven support rollers (29).
12. Plant according to one of claims 8 to 11, characterised in that the lower reeling mandrel (21) is associated with a presser-roller arm (30), which is pivotable in or pivotable out, with a presser roller (31).

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