WO2013041083A2

WO2013041083A2 - Rolling mill and rolling method

Info

Publication number: WO2013041083A2
Application number: PCT/DE2012/000937
Authority: WO
Inventors: Mark Haverkamp
Original assignee: Sms Meer Gmbh
Priority date: 2011-09-23
Filing date: 2012-09-24
Publication date: 2013-03-28
Also published as: WO2013041083A3

Abstract

In order to create a rolling mill, in particular a rolling mill having more than one mill stands, comprising at least two rolls which are mounted in a roll bearing in a mill stand to absorb rolling forces, further comprising means for moving at least one roll relative to the mill stand as well as means for determining the roll pass, said determining means having a pass reference and a spatial reference as well as means for measuring the relative position between the pass reference and the spatial reference, the rolling mill providing as accurate information as possible about the roll pass, the measuring means are designed in a contactless manner.

Description

Rolling plant and process

The invention relates to a rolling mill, in particular a multi-stand rolling mill, with at least two rollers mounted in a roll stand for receiving rolling forces in a roll bearing, with means for displacing at least one roll with respect to the rolling mill stand and with means for determining the rolling mill Roller calibers, the determining means having a caliber reference and a space reference, and means for measuring the relative position between the caliber reference and the space reference. Moreover, the invention relates to a rolling process in which rolls are made online on the basis of non-contact measurement results of means for determining a rolling caliber to a desired rolling caliber.

Such rolling plants and methods are known from the prior art in that within cylinder-piston assemblies, which are used as a displacement means for displacing the roller and determine the rolling caliber, measuring means are provided which ultimately the position of the piston in the cylinder, whereupon the rolling caliber can be closed.

[03] It is an object of the present invention to provide a generic rolling mill and a generic rolling process which allow the most accurate possible statement about the rolling caliber.

[04] As a solution rolling plants and rolling processes are proposed with the features of the independent claims, which may even allow to make statements about the rolling caliber during rolling. Further advantageous embodiments can be found in the subclaims and the following description.

[05] In order to solve the problem, in particular the measuring means can be configured without contact in a generic rolling mill. The contactlessness makes it possible to make a very precise statement about the rolling caliber, in particular since movements perpendicular to the distance between caliber reference and spatial reference and also impacts in a non-contact measurement are ultimately not so critical.

[06] To implement the contactless measuring means, these may comprise a non-contact distance sensor. In this way, one can be particularly simple and precise

| Confirmation copy | Determine relative position between caliber reference and room reference. Possibly. For more precise statements, it is possible to provide a plurality of distance sensors which measure in linearly independent directions.

[07] Very long distances can be bridged if the measuring means comprise a light source, in particular a laser light source, and a corresponding receiver. Thus, the light source and receiver can be arranged very far away from the roll or the roll stand, if only reflections are measured. It is also conceivable to arrange the light source very far away from the roller and to provide a receiver in the vicinity of the roller or vice versa. In particular, the distance sensor for a specific implementation may comprise a laser triangulation system.

[08] A very insensitive arrangement against dust and dirt follows when the measuring means comprise an inductively operating sensor. Alternatively or cumulatively, capacitive sensors, ultrasonic sensors and / or magnetoresistive sensors can be used. As accurate as possible statements about the rolling caliber allows a generic rolling mill, which is characterized in that the caliber reference is provided on the roller and / or on an assembly rotating with the roller. In this way, the measurement is carried out directly or very close to the assembly, namely on the roller whose position is to be determined. In particular, by contactless measuring means, a measurement of rotating assemblies can be readily implemented.

[10] Accurate statements about the rolling caliber can be made, in particular, when the caliber reference is provided at a portion of the roller that comes in contact with a workpiece. In this case, depending on the specific implementation of the present invention, in particular a statement about a possible wear can be made. On the other hand, it may be advantageous, in particular also cumulatively, if the caliber reference is provided on a region of the roll which does not come into contact with a workpiece. This allows, regardless of any wear but also regardless of any deposits, an accurate statement about the position of the roller in space. Preferably, in the latter implementation, the caliber reference is provided at an area with a parallel to the roll axis and / or the pass line surface component, which allows corresponding statements about the distance of the roller to the pass line. [11] Each roller rotates in a space area, each of which comes into rolling contact with a workpiece with each of its surface areas in a contact sub-area of this space area, while the respective surface areas circulate unloaded in the remaining sub-area of this space area. Preferably, the caliber reference is located outside of the contact portion region, but intrinsically, the exact location of the roll surface in the contact portion region is of interest. However, there are measurements due to the passing workpieces as well as due to the high temperatures and the burden of dust, steam and other dirt extremely difficult, so that can be closed by measurements outside the contact portion, which can be performed much more accurate, then on the rolling caliber. A sufficient distance to the contact part region is present when the caliber reference is provided in a measurement sub-region, which is remote from the Kontakteilgebiet, formed axially about the roll axis an angle of 270 ° sweeping subarea of the space area. In particular, the measuring part region may be formed symmetrically with respect to the roll axis opposite the Kontakteilgebiet. Preferably, only an angle of 180 ° is swept by the measuring part region so that it is defined by a plane defined by the roll axis on the side of the plane which faces away from the contact part region.

The caliber reference can each have at least two linearly independently arranged reference directions, so that the position can be accurately detected not only in the direction of a pass line of the rolling mill but also perpendicular thereto and thus the roll position can be measured accordingly accurately.

Accordingly, it is advantageous if a first of the two reference directions has a component parallel to the roll axis and the second of the two reference directions has a component in the direction of the pass line of the rolling mill, ie orthogonal to the pass line. However, it is understood that, if necessary, deviating reference directions are used and the roller position can then be determined by geometric methods.

[14] If the reference directions are aligned orthogonal to one another, the corresponding measuring means can therefore measure the roll position particularly effectively and thus very precisely.

As accurate as possible statements about the rolling caliber also allows a generic rolling mill, in which the space reference is arranged separately from the mill stand. This is because, in such an embodiment, the space reference is in each case independent of any rolling stresses or forces. In this case, the space reference may preferably be arranged outside a working area, which is defined in its section through the roll stand including its rollers and in its length by the pass line between the input side and output side of the rolling mill. The space reference and any equipment attached to it, such as a laser light source or a receiver, are then far away from any disturbances caused by the large heat or otherwise generated by the rolling mill, so that it does not be very affected. Also, the room reference and the corresponding equipment then hinder any work in the field of work. [17] Preferably, the rolling mill includes off-line calibration means which allow a measurement of the rolling caliber directly from inside at least one roller. Such measurements can not be carried out online, ie during rolling, because then rolling or workpieces pass through the rolls at this point. On the other hand, precisely these surface areas are those which act on the rolling stock or on the workpieces. In addition, such measurements can usually be carried out extremely accurately and in particular without disturbing influences of heat or dust and dirt.

Preferably, the measurements are then used by the offline calibration means for calibrating the measuring means or determining means for determining the rolling caliber for online measurements. [19] Accordingly, a generic rolling process can be characterized in that the determining means are calibrated offline before rolling.

Preferably, the position of the rollers is measured directly from the inside for offline calibration, as already explained above.

The rolling mill may in particular by a control circuit for controlling the rolling caliber comprising the determining means and by input means of measurement results of the calibration as a reference variable of the control loop, as a correction variable for the control variable of the control loop and / or as a correction variable for the determining means or Distinguish relocating agent. In this way, the roll position or the rolling caliber can be readjusted online based on the measurement results determined measuring means. The setting of the rolls is preferably carried out within a control loop taking into account measurement results of the determination means, so that the position of the rolls coincides as exactly as possible with the required values.

Preferably, the offline calibration is carried out along the pass line already in rolling position rollers, which can be made only on the adjustment still or removed from the pass line. In particular, therefore, the offline calibration is carried out at along the pass line arranged rolling stands. On the other hand, the offline calibration can also be performed on rolling stands that are not arranged in the rolling mill itself, which is referred to as outline calibration. [24] In the present context, the term "rolling stand" refers to any structural unit that applies and compensates for the forces involved in rolling and rolling, so a rolling mill can be provided and designed as a frame and structurally mobile unit for fast changing operations Rather, the rolling stand can also be relatively rigidly connected to the rest of the rolling mill, so that change operations such as replacement of rollers or other wear parts require major assembly activities.

[25] It is understood that the features of the solutions described above or in the claims can optionally also be combined in order to be able to implement the advantages in a cumulative manner. [26] Further advantages, objects and features of the present invention will be explained with reference to the following description of exemplary embodiments, which are also illustrated in particular in the appended drawing. In the drawing show:

Figure 1 is a schematic side view of a rolling mill;

FIG. 2 shows a schematic front view of a rolling mill which can be used in the rolling mill according to FIG. 1;

FIG. 3 shows a schematic front view of a further roll stand which can be used in the rolling plant according to FIG. 1; and

FIG. 4 shows a schematic front view of a further roll stand which can be used in the rolling plant according to FIG.

The rolling mill 1 illustrated in FIG. 1 comprises a multiplicity of rolling stands 20 which are arranged along a pass line 2 from an input side 12 to an exit side 13 and which each carry rollers 30. Each of the rollers 30 is mounted about a roller axis 32 (see, for example, FIG. 3) rotatable, mounted on a roller shaft 33 via a roller bearing 35 in a bearing body 70, which is realized in this embodiment by a rocker 45.

[28] Here, the rocker 45 has a bearing side 46, which carries the roller bearing 35 and ultimately forms the bearing body 70. In addition, the rocker 45 is pivotally mounted at its end remote from the bearing side 46 on a guide side 47, wherein on the storage of the guide side 74 of the movement space of the rocker 45 is defined.

[29] On the bearing side 46, a rolling force-free projection 75 is provided, which as shown in Figure 2, a caliber reference 54 carries.

The rolling stands 20 including their rollers define the cross-section of a working area 15 which extends from the beginning of the first rolling stand 20 and the associated rolls 30 to the end of the last rolling stand and any assemblies located there parallel to the pass line 20.

[31] In addition, the rollers 30 rotate in a space region 36, which ultimately corresponds to the outer contour of each roller 30. In this case, each roller-acting surface area of the roller 30 comes into contact with a passing workpiece in a contact sub-area 37. Preferably, a measurement of the rolling caliber is carried out outside the contact part region 37 in a measuring part region 38.

In a specific embodiment (see FIG. 2), on the bearing side 46 of the rollers 30, piston-cylinder units 42 each actuate the rollers 30 and are each supported on the rolling stand 20, whereby force introduction regions 24, over which the rolling forces are introduced into the mill stand 20, are conditional. About the piston-cylinder units 42 can therefore be influenced in the desired manner, the rolling caliber.

The piston-cylinder units 42 are thus displacement means 40, which serve for the displacement of the rollers 30. It is understood that instead of the piston-cylinder units 42 in different embodiments, other displacement medium, such as electromechanical displacement means possibly with a hydraulic lock, are used.

[34] Similarly designed displacement means 40, which also comprise piston-cylinder units 42 which interact in the region of force introduction regions 24 with the roll stand 20, respectively, are realized in the embodiment according to FIG. Deviating from this are in the embodiment of Figure 4 to the rolling stands shown there 20 provided as a displacement means 40 eccentric bushings 41, which store the rollers 30 and their roller shafts 33 eccentrically to scaffold arms 21 and hire or move by a relative movement of the eccentric bushings 41. Here, the framework arms 21 are again operatively connected via force introduction regions 24 to the rolling stand, wherein - if necessary - the framework arms 21 can also be designed in one piece with the rolling stand 20.

It is understood that depending on the concrete implementation of the present embodiments, rolling stands 20 with two rollers 30, as shown in Figures 2 and 3 or stands 20 with three rollers 30, as shown in Figure 4, or even rolling stands 20 with more rollers 30 may be provided. Also, the number of along the pass line 2 successively arranged rolling stands 20 may be adjusted according to the respective requirements. In particular, it is conceivable to provide only one rolling stand 20.

For determining the rolling caliber, in the exemplary embodiment shown in FIG. 2, determining means 50 are provided, which have the respective caliber references 54 and associated room references 56 and means for measuring the relative position between the references 54, 56. Here, the ^~ 58 M include? Ssmittel a distance sensor 60, which each comprise a laser light source 62 and a receiver 63, so that the measuring means 58 and the distance sensor are configured in a contactless 60th In this embodiment, both the laser light source 62 and the receiver 63 are disposed on the space reference 56, the laser light source 62 emits laser light on the caliber reference 54 and the receiver 63 resumes this light so that the distance between the caliber reference 54 and the space reference 56 can be determined. It is understood that in different embodiments light source and receiver can be provided on separate references. In this case, the room references 56 are each arranged on a space reference carrier 77, which in this embodiment is designed as a carrier ring 78 and is fastened separately from the rolling stand 20.

The distance sensors 60 can therefore be used to determine the rolling caliber as well as any misalignments of the roll axis apart from parallel displacements of the roll 30 to the roll axis 32.

[39] The latter misalignment, namely the parallel displacements, ie an axial offset with respect to the roll axis 32, can easily be achieved in the arrangement according to FIG be determined, in which the reference directions 54A, 54B of the caliber reference 54 per roller 30 against the embodiment shown in Figure 2 are not parallel to each other, ie linearly dependent, but orthogonal to each other, ie linearly independent aligned. In this way, the position of the center of the respective roller 30 can be determined very accurately in its position, wherein, if necessary, further determination means 50 or measuring means 58 and distance sensors 60 can be provided for more accurate statements.

[40] In the exemplary embodiment shown in FIG. 3, the reference carrier 77 is likewise embodied as a carrier ring 78, but is much larger than the working area 15 of the rolling mill 1, while in the exemplary embodiment illustrated in FIG. 2 the reference carrier 77 or the carrier ring 78 is inside the Work area 15 are arranged.

[41] In concrete implementation, the carrier ring 78 carries respective distance sensors 60 which have a laser light source 62 and a receiver 63 and each radiate to certain areas of the rollers 30, so that in this respect a distance and thus a corresponding position of the roller 30 can be determined. The number of distance sensors 60 per roller in this case depends on the desired statements about the position of the respective roller, ie on the question of how many of the six degrees of freedom of a roller to be determined, where appropriate, also light section sensors or other measuring means 58, with which contactless the position of a body can be determined in space, can be used.

[42] For example, these inductively operating sensors 65 may be used, which are used as distance sensors 60, as illustrated by the embodiment in FIG. In this case, a space reference support 77 has a plurality of support arms 79, which carry the distance sensors 60 and therefore the respective room references 56.

The determination means 50 lying in the reference direction 54B in FIG. 3 each use a caliber reference 54 which is provided on the surface of the roller 30 which comes into rolling contact with a workpiece. The same applies to the corresponding determination means 54 according to FIG. 4, with the latter embodiment also measuring the determination means 50 provided orthogonally for this purpose on a surface of the roller 30. All of these caliber references are located outside the contact portion 37 and within the measurement portion 38 of Figure 1. [44] It will be understood that the position of the rollers 30, and thus also the rolling caliber, can readily be monitored by the means of determination 50 during rolling. In particular, it is possible, taking into account these non-contact measuring to set the rolling caliber to a desired rolling caliber. In this case, it is advantageous if, as is expediently carried out in these exemplary embodiments, the determination means 50 are calibrated off-line before rolling, whereby the position of the rollers 30 is preferably measured directly from the inside for calibration, since this roll position ultimately determines the rolling result decisively is.

[45] It is also understood that the setting of the rollers 30 can take place within a control loop taking into account the measurement results of the determination means 50.

LIST OF REFERENCE NUMBERS

1 rolling mill 25 46 bearing side (numbered as an example)

2 pass line 47 leading side (exemplary be¬

12 entrance page numbered)

5 13 Outgoing page 50 Determination means (exemplified 15 work area)

20 Rolling stand 30 54 Caliber reference (by way of example, numbered

21 scaffold arm (numbered as an example)

24 Force transmission area (example 54A Reference direction

10 shown) 54B reference direction

30 Roller 56 Room reference (by way of example

32 roll axis 35 finished)

33 roller shaft 58 measuring means (numbered as an example) 35 roller bearing 60 distance sensor (by way of example, numbered

15 36 room area finished)

37 contact part region 62 laser light source

38 measuring section 40 63 receiver

40 displacement means (exemplarily 65 inductively working sensor

numbered) 70 bearing body

20 41 Eccentric bush (example: be75 rolling force-free overhang

ziffert) 77 Raumreferenzträger

42 Piston-cylinder unit (exempla45 78 Carrier ring

numbered) 79 Carrier arm

45 swingarm (numbered as an example)

Claims

claims:

1. rolling mill (1), in particular multi-stand rolling mill (1), with at least two in a roll stand (20) for receiving rolling forces in a roller bearing (35) mounted rollers (30), with means (40) for displacing at least one roller ( 30) with respect to the rolling stand (20) and with means (50) for determining the rolling caliber, the determining means (50) having a caliber reference (54) and a space reference (56) and means (58) for measuring the relative position between the Have caliber reference (54) and the space reference (56), characterized in that the measuring means (58) are designed without contact.

2. rolling mill according to claim 1, characterized in that the measuring means (58) comprise a non-contact distance sensor (60).

3. rolling mill according to claim 1 or 2, characterized in that the measuring means (58) comprise a light source, in particular a laser light source (62), and a corresponding receiver (63).

4. rolling mill according to claim 2 and 3, characterized in that the non-contact distance sensor (60) comprises a laser triangulation system.

5. rolling mill according to one of the preceding claims, characterized in that the measuring means (58) comprise an inductively operating sensor (65), a capacitive sensor, an ultrasonic sensor and / or a magnetoresistive sensor.

6. rolling mill (1), in particular multi-stand rolling mill (1), with at least two in a roll stand (20) for receiving rolling forces in a roller bearing (35) mounted rollers (30), with means (40) for displacing at least one roller ( 30) with respect to the rolling stand (20) and with means (50) for determining the rolling caliber, the determining means (50) having a caliber reference (54) and a space reference (56) and means (58) for measuring the relative position between the Caliber reference (54) and the space reference (56), characterized in that the caliber reference (54) is provided on the roller (30) and / or on an assembly rotating with the roller.

7. rolling mill according to claim 6, characterized in that the caliber reference (54) at a portion of the roller (30) which comes into contact with a workpiece, is provided.

8. rolling mill according to claim 6 or 7, characterized in that the caliber reference (54) at a region of the roller (30) which does not come into contact with a workpiece, preferably at an area with a to the roller axis (32) and / or to the pass line (2) parallel surface component, is provided.

9. rolling mill according to one of claims 6 to 8, characterized in that the roller (30) in a space area (36) rotates, which comprises a contact with a workpiece in contact contact portion (37), and the caliber reference (54) outside of Contact part region (37), preferably in a measuring part region (38), which in an away from the contact portion (37), axially to the roll axis (32) an angle of 270 °, in particular an angle of 180 °, sweeping part of the area area (36) is formed, is provided.

10. rolling mill according to one of the preceding claims, characterized in that the caliber reference (54) per roller (30) has at least two linearly independently arranged reference directions (54A, 54B).

1 1. A rolling mill according to claim 10, characterized in that a first of the two Referenzrichtüngen (54A, 54B) has a component parallel to the roll axis (32) and the second of the two reference directions a component orthogonal to the pass line (2) of the rolling mill (1) ,

12. rolling mill according to claim 10 or 1 1, characterized in that the reference directions (54A, 54B) are aligned orthogonal to each other.

13. rolling mill (1), in particular multi-stand rolling mill (1), with at least two in a roll stand (20) for receiving rolling forces in a roller bearing (35) mounted rollers (30), with means (40) for displacing at least one roller ( 30) with respect to the rolling stand (20) and with means (50) for determining the rolling caliber, wherein the determining means (50) has a caliber reference (54) and a Room reference (56) and means (58) for measuring the relative position between the caliber reference (54) and the space reference (56), characterized in that the space reference (56) is arranged separately from the rolling stand (20).

14. Rolling plant according to claim 13, characterized in that the space reference (56) outside a working area (15) is arranged, which in its section through the roll stand (20) including its rollers (30) and in its length by the pass line (2 ) between input side (12) and output side (13) of the rolling mill (1) is defined.

15. rolling mill according to one of the preceding claims, characterized by offline calibration means which allow a measurement of the rolling caliber directly from the inside of at least one roller (30).

16. Rolling plant according to claim 15, characterized by a control circuit for controlling the rolling caliber comprising the determining means (50) and input means of measurement results of the calibration as a reference variable of the control loop, as a correction variable for the control variable of the control loop and / or as a correction variable for the determining means (50) or the displacement means (40).

17. A rolling process in which rolls (30) are made online, taking into account non-contact measurement results from means (50) for determining a rolling caliber to a desired rolling caliber, characterized in that the determining means (50) are calibrated off-line before rolling.

18. Rolling method according to claim 17, characterized in that for offline calibration, the position of the rollers (30) is measured directly from the inside.

19. rolling method according to claim 17 or 18, characterized in that the hiring of the rollers (30) takes place within a control loop taking into account measurement results of the determining means (50).