KR20170073633A - Strand-guiding rolling unit for a continous casting machine - Google Patents

Abstract

The present invention relates to a strand-guiding rolling unit (33, 33a) for guiding metal strands in a continuous casting machine (2), wherein the strand-guiding rolling unit A strand-guiding roller 26, a roller carrier 28, 28a, a regulating device 30 and a crosshead 32 (not shown) , Wherein the individually positionable strand-guiding roller (26) is connected to the roller carrier (28, 28a), the regulating device (30) comprising, at one end, the roller carrier And connected to the crossheads 32 and 32a at the other end and the present invention further comprises a strand-guiding segment 101 and a strand guide (8). The adjustment device 30 is rotatably and rotatably movable in at least one support 43 to the crosshead 32 or 32a or the roller carrier 28 or 28a, When connected, a particularly preferred strand-guiding rolling unit 33, 33a is achieved.

Description

[0001] STRAND-GUIDING ROLLING UNIT FOR A CONTINOUS CASTING MACHINE [0002]

The present invention relates to a strand-guiding rolling unit for guiding metal strands in a continuous casting machine, wherein the strand-guiding rolling unit comprises a strand- A strand-guiding roller, a roller carrier, a regulating device and a crosshead, wherein the individually positionable strand-guiding rollers are arranged on the roller carrier And the adjustment device is connected to the roller carrier at one end and to the crosshead at the other end.

During continuous casting of the metal, the metal melt is fed to the cooled mold, solidified at least in the edge region in such a mold, and typically continuously - in the form of already strands - from a continuous casting machine And is transported through the strand guide.

The strands are guided, supported and further cooled by the strand guide. For this purpose, the strand guide typically comprises a plurality of strand-guiding segments with strand-guiding rollers. At least some of the strand-guiding rollers of such strand-guiding rollers are typically positionable or squeezable relative to the strands by a plurality or individually regulating devices.

WO 2011/095 383 A1 discloses a strand-guiding segment having strand-guiding rolling units arranged in a cassette-like manner. Each strand-guiding rolling unit comprising individually positionable strand-guiding rollers, a crosshead, a roller carrier and a regulating device, wherein the regulating device is connected to the crosshead and the roller carrier And are connected in a rotationally movable manner.

The object of the present invention is to propose a preferably configured strand-guiding rolling unit.

This problem is solved by the fact that according to the invention, the regulating device is connected to the crosshead or roller carrier by means of at least one support in a translationally and rotationally movable manner, - is solved by a guiding rolling unit.

The invention is based on the finding that a sufficiently movable support of the regulating device is required on the crosshead and / or roller carrier, in particular in order to prevent undesirable lateral force and / or moment action, I start from the idea. The present invention then continues with the recognition that the conventional rotatable connection of the regulating device with the crosshead and roller carrier by means of rotational joints arranged on both sides of the regulating device can serve as a disadvantage.

On the one hand, such joints or supports on both sides of the rotary joint system can be associated with greater complexity in the construction. In particular, the crosshead and the roller carrier are each provided with a cross bore (not shown) for receiving at least one bearing element (e.g. a bolt, a bearing seat, etc.) ) -, the mechanical properties of the strand-guiding rolling unit may be adversely affected. In order to achieve a sufficient bending strength and / or shear strength of the crosshead and / or the roller carrier despite the presence of the bearing element, the total height of the crosshead and / Or use a material of higher strength. This can lead to situations that take up too much of the limited installation space, and / or can lead to an increase in cost.

On the other hand, the joints of the rotary joints on both sides may require a flexible tube to supply a working medium, such as hydraulic fluid or the like, to the regulating device, in order to compensate for the rotational movement. These types of flexible, well-bending tubes can be easily damaged, especially in the ambient conditions that lead to continuous casting. As a result, the working medium can be drained from the tube due to leakage, whereby undesirable contact of the strand with the working medium can take place, which in turn can lead to fire hazards.

By means of the adjustment device being connected to the crosshead or roller carrier by means of a translational and rotatable support, the invention embodies a fully movable support of the adjustment device. Thereby, undesirable lateral force action and / or moment action against the regulating device is prevented. At this time, it is sufficient that the regulating device is supported by the crosshead in such a manner that it is connected or is connected to the roller carrier in such a manner that it is connected. Thus, the rotatable connection on both sides of the adjustment device by the rotating joints can be omitted - overcoming the mentioned disadvantages.

The expression "positionable with respect to the strand" may mean, in the context of the present invention, that the strand-guiding roller can be moved, adjusted or provided in the direction of the strand in order to exert a force on the strand have. To this end, the regulating device may exert a force on the roller carrier, or indirectly, on the strand-guiding roller and / or cause mobility. The force and / or mobility may act along the direction of regulation. The direction of adjustment may be a direction along the direction of operation of the regulating device, in particular a direction along the direction of the stroke of the hydraulic cylinder or the like. Preferably the direction of adjustment may be in the direction of casting of the strand through the strand-guiding segment or in the direction of the transverse direction with respect to the conveying direction.

In the context of the present invention, when a regulating device is able to carry out a relative translational motion whose direction and degree are defined by the component, for a part connected to this regulating device by means of a support, It is considered to be connectable in a movable manner.

In the context of the present invention, when the regulating device is capable of effecting a relative rotational motion, the direction and the degree of which are defined by the component, for the component connected to this regulating device by the support, It is considered to be connectable in a movable manner.

Preferred embodiments of the invention are given in the dependent claims.

In a preferred embodiment of the present invention, the regulating device is connected to the crosshead not connected by the support portion in a translationally and rotationally fixed manner, or in a manner in which the roller carrier is not translated by the support portion, It is connected. Briefly, the regulating device is preferably fixed in its own end which is opposed to the support, i. E. In a crosshead or roller carrier, for example by a threaded connection and / or a welded connection, in a non-translational and rotationally non-rotatable manner. In other words, the regulating device can be connected in a translational and rotational movement manner to the roller carrier by the support at one end, and at the other end the regulating device is rotatably and rotationally fixed to the crosshead Can be connected. Alternatively, the regulating device may be connected in a translational and rotational manner to the crosshead by the support at one end, and at the other end the regulating device is connected to the roller carrier in a translational and rotationally fixed manner .

By such a connection method, a flexible tube susceptible to leakage between the crosshead and the regulating device for supplying the working medium or between the roller carrier and the regulating device can be omitted. In addition, bearing elements that are structurally complicated, take up too much installation space and adversely affect the mechanical properties of the strand-guiding rolling unit can be prevented or reduced in number. A strand-guiding rolling unit, which is preferably constructed in this way, is achieved. In particular, a strand-guiding rolling unit of relatively reduced overall height and reduced volume in this manner can be achieved.

In the concept of the present invention, when the relative translational movement of the adjusting device and the part relative to each other, which may be implemented, for example, by a guide, sliding rail or the like, is suppressed by the component, The movement can be connected in a fixed way. Relative translational movements due to elastic deformation can not, of course, be suppressed or suppressed.

In the context of the present invention, when the relative rotational movement of the adjusting device and the part relative to each other, which may be implemented, for example, by a rotating joint, pivot joint or the like, is suppressed by the component, May be connected to the part in a rotationally fixed manner. The relative rotational motion caused by the elastic bending action and the elastic shear deformation can not be suppressed or suppressed naturally.

 In a further embodiment the support has an axial translational degree of freedom of the individually locatable strand-guiding roller. The "translation degree of freedom" in the context of the present invention is understood to be kinematic mobility given along a predetermined direction by the component. Depending on the degree of freedom of translation of the support, the relative translational movement of the adjustment device relative to the crosshead or roller carrier may be achieved, depending on whether the adjustment device is connected to the crosshead by the support or connected to the roller carrier. . In this manner, an undesirable lateral force, which may cause tilting of the roller carrier within the frame of the strand-guiding segment and / or which may adversely affect the regulating device, is transmitted on the regulating device The situation can be minimized.

Next, it is preferable that the support portion includes a sliding guide capable of translational motion. Preferably, the sliding guide is a linear sliding guide for guiding the relative translational motion between the regulating device and the roller carrier, or between the regulating device and the crosshead. Sliding guides have been inspected several times, can be designed with no complexity using simple design criteria, and the need for maintenance is low. Accordingly, a preferable structure of the strand-guiding rolling unit can be achieved by such a sliding guide.

Preferably, the sliding guide includes at least one sliding bar. It is preferable that the sliding bar is disposed on a roller carrier or a crosshead. Preferably, the sliding guide includes at least one sliding block, and the sliding block is guided on the sliding bar, preferably between the two sliding bars.

In a preferred embodiment, the support has rotational freedom about an axis of rotation parallel to the strand length direction. The strand length direction may be the direction in which the strand can be guided in the continuous casting machine or in the strand guide of the continuous casting machine by rolling the strand-guiding rollers in a tangential direction. In the context of the present invention, "rotational freedom" can be understood as kinematic mobility given by a component about a predetermined rotational axis. Depending on the degree of freedom of rotation of the support, the relative rotational movement of the regulating device relative to the crosshead or roller carrier is achieved, depending on whether the regulating device is connected to the crosshead by the support or connected to the roller carrier. . In this manner, a situation in which an undesired moment is imparted on the regulating device which may cause tilting of the roller carrier in the frame of the strand-guiding segment and / or which may adversely affect the regulating device is prevented .

In a further preferred embodiment the support comprises a rotatable bolt connection. The bolted connections have been inspected several times, can be designed uncomplicated using simple design criteria, easily released with conventional tools, and low maintenance requirements. Accordingly, a desirable structure of the strand-guiding rolling unit can be achieved by such a bolt connection.

In addition, it is preferable that the adjustment device includes a screw flange for screw connection with the crosshead or the roller carrier. Screw-flange connections have been inspected several times and can be designed to be uncomplicated in structure, so that a desirable and uncomplicated structure of the strand-guiding element can be achieved. If the screw-flange connection has at least one releasable connection means, the regulating device can be particularly easily separated from the strand-guiding rolling unit. The connecting means may be a screw, a screw nut, a threaded bolt, or the like.

It is also preferable that the adjustment device includes a bolt eye for bolt connection with the roller carrier or the crosshead. It is preferable that the bolt eye and the screw flange are disposed at opposite ends of the adjusting device. The "bolt-eye" can be understood as a cross bore for accommodating the bolt. In this way, it is possible to achieve the connection of the crosshead or the roller carrier with the regulating device, which is connectable and disconnectable in a particularly preferred and simple manner, whereby the desired structure of the strand-guiding rolling unit can be achieved have.

It is preferable that the regulating device is connected to the roller carrier by the support portion. In this case, it is preferable that the regulating device is connected to the crosshead in such a manner that the regulating device is fixed to the crosshead and rotationally fixed. By means of a fixed connection of this type between the crosshead and the regulating device a flexible tube which is vulnerable to leakage, for example between the crosshead and the regulating device for the supply of the working medium, can be omitted. In addition, bearing elements that are structurally complicated, occupy too much installation space, and which adversely affect the mechanical properties of the crosshead can be prevented. In this manner, a crosshead with comparatively low overall height and relatively small volume in equal or improved strength characteristics can be achieved.

Preferably, the regulating device is a pressurizing medium cylinder. It is preferable that the regulating device is a hydraulic cylinder, in particular in order to be able to exert a sufficiently large force on the strand from the regulating device through the roller carrier and the strand-guiding roller.

In one preferred refinement, each individually locatable strand-guiding roller is assigned two pressurized medium cylinders, in particular two hydraulic cylinders, which are connected to the roller carrier. In particular, the asynchronous control of the two pressurized medium cylinders and consequently the uneven control and / or regulating path, the different lever action of the regulating device for the roller carrier, etc., can cause an undesirable tilting moment on the roller carrier. Accordingly, tilting of the roller carrier can be caused within the strand guide, more precisely within the strand-guiding segment or within the frame of the strand-guiding segment. For this reason, particularly when two pressurized medium cylinders are used per strand-guiding roller, the connecting and rotatable connection between the above-mentioned regulating device and the roller carrier is particularly preferred. It is preferable that one support member is assigned to each of the pressurized medium cylinders.

In a preferred formative example, the strand-guiding segment comprises a pipeline for feeding the pressurized medium to the regulating device fixed to the crosshead and regulating device. "Pipeline" is understood to be a line having a substantially high flexural strength, as opposed to a tube line, for guiding the working medium. By using pipelines instead of conventional less rigid tube lines, the damage safety of the pressurized medium supply line can be increased, thereby preventing leakage, and in a situation where the pressurized medium is subsequently undesirably discharged onto the strands Can be prevented, and an adverse effect on the strand quality can be basically prevented. Also, tube complexity can be reduced in this manner.

In a further preferred embodiment of the preferred embodiment, at least one position monitoring device for monitoring the position of the strand-guiding roller relative to the individually positionable strand-guiding roller, for example based on the volume flow measurement, and / A displacement measuring system is assigned to measure the set position of the strand-guiding roller along the adjustment direction of the guiding roller. In this way, the position of the strand-guiding roller can be controlled and / or adjusted using the settable position measurable in this manner.

It is also preferable that the displacement measuring device is structurally separated from the regulating device and disposed between the crosshead and the roller carrier. The expression "structurally separated" may mean that the displacement measuring device is formed as an intemal component of the regulating device, for example, outside the pressurized medium cylinder. By means of the "external" arrangement of the scheme, the accessibility of the displacement measuring device can be improved, for example, for maintenance purposes. In this manner, the decomposition process of the regulating device for reaching the displacement measuring device can be prevented.

In a further embodiment, the displacement measuring device is fixed to the crosshead at one end and to the roller carrier at the other end. In this way, by the simple means, the supporting gap according to the case of the support can be detected by the displacement measuring device, so that the adverse effect on the displacement measurement can be prevented.

In one improvement, the displacement measurement device includes a magnetostrictive displacement transducer. The magnetostrictive displacement transducers known per se are generally insensitive to environmental influences such as temperature, vibration and contamination, and are therefore particularly suitable for use in the operating conditions of a continuous casting machine.

In a particularly robust improvement, the displacement measuring device comprises a protective housing.

It is also preferable that the displacement measuring device includes an outer pipe fixed to the roller carrier, and a bellows disposed between the outer pipe and the protective pipe.

In a preferred embodiment, a protective medium is provided in a protective housing, in particular a cavity formed by said protective housing, for receiving a displacement transducer. Preferably, the protective medium is a pressurized gas, such as compressed air, that prevents the penetration of contaminating particles or dust particles into the interior of the protective housing. In this manner, a displacement measuring apparatus which is particularly rigid and has a low maintenance need can be achieved.

In addition, the present invention relates to a strand-guiding segment for a strand guide in a continuous casting machine. The strand-guiding segment comprises at least one strand-guiding rolling unit according to any one of claims 1 to 13.

It is preferred that the crosshead of the strand-guiding rolling unit is releasably connected to the frame of the strand-guiding segment. Advantageously, the roller carrier of the strand-guiding rolling unit is supported on the frame of the strand-guiding segment transversely with respect to the regulating device, in particular by guiding rails. The guiding rails may be formed as sliding supports, in particular as linear sliding supports. In this way a lateral force exerted on the strand-guiding roller from the strand can be introduced into the frame of the strand-guiding segment through the roller carrier and the guiding rails, Undesirable lateral force action is reduced.

Guiding roller on the opposite side of the strand-guiding rolling unit in the direction of adjustment, in particular in the direction of adjustment, on the opposite side of the individually positionable strand-guiding roller, to the frame of the strand- It is preferable that the support member is supported so as to be rotatable in the direction. Subsequently, it is preferable that a plurality of, for example, 5 to 10 strand-guiding rolling units are arranged in a cassette shape in the strand length direction in the frame of the strand-guiding segment. By virtue of the cassette-like arrangement of the strand-guiding rolling units within the frame of the strand-guiding segment, a particularly simple assembly, disassembly and maintenance of the strand-guiding rolling units or the strand- .

The present invention also relates to a strand guide of a continuous casting machine. The strand guide comprises at least one strand-guiding segment according to claim 14. It is preferable that a plurality of strand-guiding segments are continuously arranged in the strand length direction in the strand guide of the continuous casting machine. Preferably, the strand-guiding segments are individually assembled and disassemblable. A strand guide which is particularly complicated to maintain and adapt in this manner is achieved.

The detailed description of the preferred embodiments described heretofore includes a number of features, which are incorporated in their various dependent claims in part in several aspects. However, such features may be preferably considered individually and may be combined into preferred additional feature combinations. In particular, such features may be combined with the method according to the invention and the apparatus according to the invention, each referring to independent claims, individually and in any suitable combination.

The manner in which the above described features, features, and advantages of the present invention, and the manner in which those features, features, and advantages are achieved will be better understood and appreciated with reference to the following detailed description of embodiments, Will be described in more detail with reference to the drawings. The above embodiments are used to illustrate the present invention and the present invention is not limited to the combination of the features shown in these embodiments with respect to the functional features. Moreover, for this purpose, suitable features of each embodiment may be considered explicitly separate and may be inserted into another embodiment for the purpose of eliminating one embodiment and supplementing another, and / Lt; / RTI > claims.

1 is a schematic view of a continuous casting machine with strand guides or strand-guiding segments,
Fig. 2 is a detailed sectional view of the strand guide of Fig. 1,
Figure 3 is a perspective view of the strand-guiding segment of Figure 2 with a plurality of strand-guiding rolling units,
Figure 4 is a perspective view of a strand-guiding rolling unit of one of the strand-guiding rolling units of the strand-guiding segment of Figure 3,
Figure 5 is a perspective view of a further strand-guiding rolling unit,
Figure 6 is a perspective sectional view of a strand-guiding rolling unit, and
Fig. 7 is a perspective sectional view of the displacement measuring apparatus of the strand-guiding rolling unit of Figs. 3 and 4. Fig.

1 is a schematic view of a continuous casting machine 2 for producing a slab-like metal strand. The continuous casting machine 2 comprises a strand guide 8 with a ladle turret 4, a mold 6 and a plurality of strand-guiding segments 10a-10l. The continuous casting machine 2 is in a hall which is supported by a lower frame through a hall frame with a plurality of steel girders 12. The continuous casting machine (2) is supported on a support structure (14).

Liquid steel is supplied to the mold (6) through the ladle turret (4) to produce a metal strand. The liquid steel in the mold 6 is solidified in at least the edge region and continuously supplied in the form of strands which have already been partially solidified from the mold 6 to the strand guide 8 of the continuous casting machine 2 And is conveyed through the strand guide 8.

The strands are guided, supported by the strand guide 8 and further cooled. For this purpose, the strand guide 8 comprises the strand-guiding segments 10a-10l.

2 is a detailed sectional view of the strand guide 8 of Fig. In this figure, strand-guiding segments 10j, 10k and 10l are identified. The strand-guiding segments 10j and 10k are implemented as so-called four-axis segments. The strand-guiding segment 101 is embodied in a cassette structure of a separate roller positioning system. For this purpose, a number of, exactly seven, substantially identical strand-guiding rolling units 33 are arranged continuously in cassette form in the strand length direction L in the strand-guiding segment 10l . Of course, it is also conceivable to consider implementing the entire strand-guiding segments of the strand guide 8 with a cassette structure of a separate roller positioning system, which is desirable.

3 is a perspective view of the strand-guiding segment 101 of FIG. The strand-guiding segment 10l comprises a frame 16, which is connected by an upper frame 18, a lower frame 20 and a side support frame 22.

A plurality of strand-guiding rollers 24 are assigned to the lower frame 20, and the strand-guiding rollers 24 are wound on the strand-guiding rollers 24 Respectively. Each strand-guiding roller 24, which is not movable in the radial direction, is rotatably supported on the lower frame 20 by four bearings 42 about the longitudinal axis of the strand-guiding roller.

The upper frame 18 is assigned with seven strand-guiding rollers 26 that can be individually positioned in the adjustment direction V in this embodiment.

Each individually locatable strand-guiding roller 26 is assigned a roller carrier 28, at least one regulating device 30 and a crosshead 32, respectively. Each individually positionable strand-guiding roller 26 is axially rotatably supported on the roller carrier 28 assigned to the strand-guiding roller by four bearings 40 . Each of the roller carriers 28 is supported on its own end side inside or outside the side support frame 22 in a sliding manner so as to be movable in the adjustment direction V. [ Each crosshead (32) is releasably connected to the upper frame (18).

The separately locatable strand-guiding roller 26 is provided with a strand-guiding roller 26 with a crosshead 32, a roller carrier 28 and at least one regulating device 30 assigned to this strand- Unit 33 is formed.

The strand-guiding segment 101 includes seven such strand-guiding rolling units 33 of substantially the same construction. A high maintenance possibility is achieved by means of such a cassette-like structure of the strand-guiding segment 101 with strand-guiding rolling units 33 which are individually assembled and disassembled.

In addition, the regulating devices 30 are implemented as a pressurized medium cylinder 34, or more precisely as a hydraulic cylinder. Subsequently, one pipeline 36 is fixed to each crosshead 32 and each regulating device 30 to supply a pressurized medium to each regulating device 30.

The individually positionable strand-guiding roller 26 is provided with at least one displacement measuring device 38 for measuring the set position of each strand-guiding roller 26, in this embodiment two Displacement measuring device. The displacement measuring device 38 is structurally separated from the regulating device 30, that is to say outside the pressurized medium cylinder 34, between the crosshead 32 and the roller carrier 28.

By means of said strand-guiding rollers 26 which can be individually positioned in the strand in the direction of adjustment V, the strand can be metallurgically treated according to regulations, whereby the strand can be influenced by its own properties . For example, by positioning the strand-guiding rollers 26 in the adjustment direction V, the thickness of the strand traveling through the strand-guiding segment 101 along the strand length direction L And may have linear and / or non-linear characteristic curves over the length of the strands.

To locate one strand-guiding roller of the strand-guiding rollers 26, a pressurized medium is fed through the pipeline 36 assigned to the strand-guiding roller to the individual pressurized medium cylinder 34, I.e., the reciprocating motion of the pressurized medium cylinder 34. [0031] The piston action of the pressurized medium cylinder 34 given in the direction of adjustment V causes the movement of the roller carrier 28 and the strand-guiding roller 26 assigned to the strand-guiding roller 26 do. In this case, the roller carrier 28 is guided into the side support frame 22 in a sliding manner and is supported in the axial direction A of the strand-guiding roller 26, (26) is positioned in the strand. The reaction force applied to the strand-guiding roller 26, which acts in opposition to the direction of adjustment V, is transmitted to the roller carrier 28, the pressurized medium cylinder 34 and the crosshead 32, Guiding segment 10l and is subsequently introduced into the support structure 14 (see Fig. 1) of the continuous casting machine 2. The continuous casting machine 2 shown in Fig.

The detailed description of the following embodiments is focused substantially on the differences from the embodiments of Figures 1, 2 and 3, which are referred to in relation to the same retained features and functions. The components that remain substantially the same are basically represented by the same reference numerals, and the features that are not mentioned are not described again and are considered to be included in the following embodiments. The same features that may have slight differences in, for example, values or numerical values, dimensions, positions, and / or functions, have the same reference numerals and different reference characters. Where reference numerals are referred to singly without reference characters, they indicate corresponding parts of all embodiments.

Figure 4 is a perspective view of the strand-guiding rolling unit 33 of Figure 3, that is to say with the individually locatable strand-guiding roller 26 of the strand-guiding segment 101 of Figure 3, The roller carrier 28 assigned to the strand-guiding roller 26, the regulating device 30, which is embodied as two pressurized medium cylinders 34 in the figure, the crosshead 32 and the displacement measuring devices 38).

The regulating device is connected to the roller carrier 28 in a translational and rotational manner by means of two supports 43 (see Fig. 6 for details) in this embodiment. In addition, the adjustment device 30 can be connected to the crosshead 32 in a translational and rotational manner by at least one support 43. In other words, in general, the regulating device 30 can be connected to the crosshead 32 or the roller carrier 28 by means of at least one support 43 in a translational and rotational manner.

The control device 30 is connected in a manner that is translationally and rotationally fixed to the crosshead 32 which is not connected by the support 43 - in short, "not moving" or "not taut". In the crosshead 32, the articulation of the regulating device 30 or the pressurized medium cylinder 34 by, for example, a rotary joint, a bearing or the like is omitted so that a particularly desirable force flow of the crosshead 32 and / A relatively low overall height can be achieved. Also, the crosshead 32 thus has a relatively low bending effect under the stress caused by the pressurized medium cylinder 34, which positively affects the achievable properties of the strand.

The adjustment device 30 may be provided with a roller carrier which is not connected by the support portion 43, and only when the adjustment device 30 is connected to the crosshead 32 by the supports 43, (28) by a translational and rotational movement.

The crosshead 32 is connectable or connected to the upper frame 18 (see FIG. 3). The individually positionable strand-guiding roller 26 is connected to the roller carrier 28 and the regulating devices 30 are connected at one end to the crosshead 32 and at the other end To the roller carrier (28).

The crosshead 32 includes two screw flanges 44 for threaded connection with the pressurized medium cylinder of either the regulating device 30 or the pressurized medium cylinders 34 respectively. Each pressurized medium cylinder 34 includes a screw flange 46 for threaded connection with the crosshead 32. The screw flange 44 of the crosshead 30 and the screw flange 46 of the pressurized medium cylinder 34 are coupled as one pair to the one screw flange connection 48 by the connecting means 50 .

The displacement measuring devices 38 are each fixed to the crosshead 32 at one end and fixed to the roller carrier 28 at the other end. In this way a particularly accurate displacement measurement can be achieved because, unlike, for example, the displacement measurement device incorporated in pressurized medium cylinders, the pressurized medium cylinders 34 and the crosshead 32, And the supporting clearances or connection clearances as occasion arises in the connection positions between the pressurized medium cylinders 34 and the roller carrier 28 are not detected.

5 is a perspective view of an alternate additional strand-guiding rolling unit 33a. In the case of such a strand-guiding rolling unit 33a, an individually locatable strand-guiding roller 26 is assigned exactly one pressurized medium cylinder 34, A is disposed at the center of the strand-guiding roller 26 and is disposed between the crosshead 32a and the roller carrier 28a in the adjustment direction V.

6 is a perspective sectional view of the strand-guiding rolling unit 33 of Fig. The pressurized medium cylinder 34 includes a cylinder housing 52 and a cylinder piston 54 slidable in the adjustment direction V. [

The pressurized medium cylinder 34 is translated at one end to the screw flange 44 of the crosshead 32 by means of the screw flange 46 and the connecting means 50, They are connected in a fixed way.

The regulating device 30 or the pressurized medium cylinder 34 is connected to the roller carrier 28 in a translational and rotational manner by the support 43 at the other end.

The support portion 43 has a translation degree of freedom FT in the axial direction A of the strand-guiding roller 26. As a result, the adjustment device 30 is provided with a sliding guide 56 in such a manner as to be movably supported by the roller carrier 28.

In addition, the support portion 43 has rotational freedom FR about a rotation axis D parallel to the strand longitudinal direction L, and consequently, the adjustment device 30 or the pressurized medium The cylinder 34 is connected to the roller carrier 28 in such a way that it is rotatably supported about the axis of rotation D by a rotatable bolt connection 58.

The cylinder piston 54 for the bolt connection 58 includes a piston extension 60 with a bolt eye 62 wherein the bolt eye 62 is secured to the cylindrical bolt outer surface Is implemented as a cylindrical bore for receiving the bore 64. The sliding guides 56 are formed by two end faces of the sliding rails 68 opposed to each other in the adjusting direction V and the bolts 66 formed as the sliding blocks 70, respectively.

Fig. 7 is a perspective sectional view of the displacement measuring device 38 of the strand-guiding rolling unit 33 of Figs. 3 and 4. Fig.

The displacement measuring device 38 comprises a magnetostrictive displacement transducer 72 which is sufficiently insensitive to environmental influences such as temperature, vibration and contamination, ) ≪ / RTI > operating conditions. The magnetostrictive displacement transducer 72 includes a waveguide 74, a signal converter 76 and a magnet 78 formed as a ring magnet. The relative movement of the crosshead 32 and the roller carrier 28, which can be caused by the mobility of the sliding guide 56 given in the transverse direction, in particular in the direction of the adjustment V, A relative arrangement of the waveguide 74 and the magnet 78 is provided.

The displacement measuring device 38 also includes a protective housing 80 having an outer pipe 82 fixed to the roller carrier 28, a protective cover 84 secured to the crosshead 32, 82) and the protective cover (84).

A protective medium 92 is provided in the cavity 90 formed by the protective housing 80 for receiving the displacement transducer 72 or the waveguide 74. The protective medium 92 is a pressurized gas, compressed air in this embodiment, which prevents penetration of contaminating particles or dust particles into the protective housing 80.

The displacement measuring device 38 is structurally separated from the regulating device 30 (see FIGS. 3 to 5) and disposed between the crosshead 32 and the roller carrier 28. The expression "structurally separated" means that the displacement measuring device 38 is a non-internal component of the regulating device 30, that is to say formed outside the pressurized medium cylinder 34, It means that it is. By the "external" arrangement of the system of the displacement measuring device 38, the accessibility for maintenance purposes can be improved. In this manner, the disassembling process (see Figs. 3 and 4) of the regulating device 30 for reaching the displacement measuring device 38 can be prevented.

The displacement measuring device is fixed to the crosshead 32 at one end by the connecting means 88 and to the roller carrier 28 at the other end. In this way, the sliding guide 56 and / or the bolt connection 58 (in the direction of action of the regulating device 30), between the regulating device 30 and the roller carrier 28, 6) can be prevented from being detected by the displacement measuring device 38 can be prevented. As a result, an accurate displacement measurement or distance measurement of the set position s between the crosshead 32 and the roller carrier can be achieved, and the support of the slide guide 56 and / or the bolt connection 58 The adverse effects on the measurement due to the gap can be minimized.

2 continuous casting machine
4 ladle turret
6 mold
8 Strand Guide
10a - 10l Strand - guiding segment
Twelve girders
14 Support structure
16 frames
18 upper frame
20 lower frame
22 side support frame
24 Radially fixed strand-guiding rollers
26 Individually positionable strand-guiding rollers
28, 28a roller carrier
30 regulating device
32, 32a crosshead
33, 33a Strand-guiding rolling unit
34 Pressurized medium cylinder
36 Pipeline
38 Displacement measuring device
40 Bearings
42 Bearings
43 support
44 Screw flange
46 Screw flange
48 Screw flange connection
50 connecting means
52 Cylinder housing
54 Cylinder piston
56 Sliding Guide
58 volt connection
60 piston extension
62 Volt Eye
64-volt outer surface
66 volts
68 sliding rails
70 sliding block
72 magnetostrictive displacement transducer
74 waveguide
76 signal converter
78 magnets
80 Protection Housing
82 Outer pipe
84 Protective cover
86 Bellows
88 Connection Means
90 Cavity
92 Protection medium
A axis direction
D rotation axis
FT translational motion degree of freedom
FR freedom of rotation
L Strand length direction
s Setting location
V adjustment direction

Claims (15)

A strand-guiding rolling unit (33, 33a) for guiding metal strands in a continuous casting machine (2)
The strand-guiding rolling unit comprises a strand-guiding roller 26, a roller carrier 28, 28a, a regulating device 30 and a strand- Wherein the individually adjustable strand-guiding roller 26 is connected to the roller carrier 28, 28a and the regulating device 30 comprises a crosshead 32,32a, A strand-guiding rolling unit connected at one end to the roller carrier (28, 28a) and at the other end to the crosshead (32, 32a)
The regulating device 30 is supported in at least one support 43 in a translationally and rotationally movable manner in the crosshead 32, 32a or the roller carrier 28, 28a, And wherein the strand-guiding rolling unit is connected to the strand-guiding rolling unit. The method according to claim 1,
Characterized in that said regulating device (30) is fixed in its own end opposite said support part (43), in particular in a non-translational and non-rotatable manner by means of threaded connections (48) and / or welded connections Ding rolling unit. 3. The method according to claim 1 or 2,
The strand-guiding rolling unit according to claim 1, characterized in that the support part (43) has a translational degree of freedom (FT) in the axial direction (A) of the strand-guiding roller (26). 4. The method according to any one of claims 1 to 3,
The strand-guiding rolling unit according to any one of the preceding claims, characterized in that the support part (43) comprises a sliding guide (56) which is translationally movable. 5. The method according to any one of claims 1 to 4,
Wherein the support portion (43) has a degree of rotational freedom (FR) about a rotational axis (D) parallel to the strand longitudinal direction (L). 6. The method according to any one of claims 1 to 5,
The strand-guiding rolling unit according to any one of the preceding claims, characterized in that the support (43) comprises a rotatable bolt connection (58). 7. The method according to any one of claims 1 to 6,
The adjustment device 30 includes at least one screw flange 46 for threaded connection with the crossheads 32 and 32a or with the roller carriers 28 and 28a, And a bolt eye (62) for bolted connection with the carrier. 8. The method according to any one of claims 1 to 7,
Characterized in that said regulating device (30) is connected to said roller carrier (28) by said support part (43). 9. The method according to any one of claims 1 to 8,
Wherein the regulating device (30) is a pressurizing medium cylinder (34). 10. The method according to any one of claims 1 to 9,
The individually positionable strand-guiding roller 26 is provided with at least one position monitoring device for monitoring the position of the strand-guiding roller and / or at least one position monitoring device for monitoring the setting position s And a displacement measuring system (38) for measuring the position of the strand-guiding rolling unit. 11. The method of claim 10,
The displacement measuring device 38 is structurally separated from the regulating device 30 and fixed at one end to the crosshead 32 and 32a and at the other end to the roller carrier 28 and 28a Wherein the strand-guiding rolling unit is a strand-guiding rolling unit. The method according to claim 10 or 11,
The displacement measuring device (38) comprises a magnetostrictive displacement transducer (72). 13. The method according to any one of claims 10 to 12,
The displacement measuring device (38) comprises a protective housing (80), characterized in that a protective medium (92) is in particular supplied to the protective housing. A strand-guide for a strand guide (8) of a continuous casting machine (2) having at least one strand-guiding rolling unit (33, 33a) according to at least one of the claims 1 to 13, Strand-guiding segment 10l. A strand guide (8) of a continuous casting machine (2) having at least one strand-guiding segment (101) according to claim 14.

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