WO2011095383A1 - Rod guide segment in cassette design having single roll engagement - Google Patents

Abstract

The invention relates to a strand guide segment (1) for supporting and guiding a metallic strand having a slab cross-section in a strand guide of a continuous casting machine, having a top frame (3) and a bottom frame (4), wherein the top frame (3) is removably connected to the bottom frame (4); wherein a plurality of strand guide rolls (5, 6, 7) are each connected to the top frame (3) and the bottom frame (4); and wherein at least two individually movable strand guide rolls (6) arranged directly successively to each other can be individually engaged against the strand in the casting direction (2). The aim of the invention is to create such a strand guide segment wherein it is possible when the segment is in an installed state to change at least one individually movable strand guide roll (6) of the strand guide segment. Said aim is achieved by a strand guide segment, in which a roll carrier (8), at least one adjustment apparatus (9) for moving the roll carrier (8) in an engagement direction (10) crosswise to the casting direction (2) and exactly one axle (11) arranged crosswise to the casting direction (2) are allocated to each individually movable strand guide roll (6), wherein the axle (11) is removably connected to the top or bottom frame (3, 4), which is connected to the individually movable strand guide roll (6), wherein the adjustment apparatus (9) is hinged on the one side on the axle (11) and on the other side on the roll carrier (8) and the individually movable strand guide roll (6) is rotatably supported on the roll carrier (8).

Description

description

Strand guide segment in cassette construction with

Single roller adjustment

The present invention relates to a strand guide segment for supporting and guiding a metallic strand

Slab cross section in a strand guide of a

Continuous casting machine.

Specifically, the invention relates to a strand guide segment for supporting and guiding a metallic strand

Slab cross section in a strand guide of a

Continuous casting machine, comprising a top frame and a bottom frame, wherein the top frame is detachably connected to the sub-frame; wherein a plurality of strand guide rollers are respectively connected to the upper frame and the lower frame; and wherein in the casting direction at least two directly

successively arranged individually displaceable strand guide rollers are individually adjustable against the strand.

From DE 27 31 748 is a strand guide segment with

Single roll adjustment known in which at least two consecutive pairs of strand guide rollers

individually, i. independently of each other, are adjustable against the strand. In this solution are two

Adjustment facilities on the one hand with the subframe and on the other hand connected to the upper frame, so that when disassembling a displaceable strand guide roller the

Adjustment devices manually detached from the upper frame and then the upper frame of the subframe must be solved. Furthermore, the release of the upper frame from the subframe is also an unmovable when disassembling Strand guide roller necessary. Due to the cramped

Space in the strand guide a continuous casting is thus the change of a single strand guide role in the installed state of the strand guide segment not possible, which adversely affects the maintainability of the segment and the maintenance costs.

The object of the invention is to provide a strand guide segment of the type mentioned, in which it in

installed state of the segment is possible to change at least one, preferably each, individually displaceable strand guide roller of the strand guide segment separately. This improves the ease of maintenance of the strand guide segment

improved.

This object is achieved by a strand guide segment in which each individually displaceable strand guide roller a roller carrier, at least one adjusting device for moving the roller carrier in a Anstellrichtung transverse to the casting direction and exactly one transverse to the casting direction

arranged crosshead are assigned, wherein the crosshead is detachably connected to the upper frame or the subframe, which is connected to the individually displaceable strand guide roller, wherein the adjusting device articulated on the one hand on the crosshead and on the other hand on the roller carrier and the individually displaceable strand guide roller on the

Roller carrier is rotatably supported.

In this case, in a modular construction of each individually displaceable strand guide roller is a roller carrier,

associated with at least one adjusting device and exactly one transverse to the casting direction arranged crosshead, so that these components can be supplied to the strand guide segment modular or removed during assembly or disassembly. The crosshead is itself connected to the frame, specifically, detachably connected to the upper ^¬ or subframe, which is connected to the individually displaceable strand guide roller. This construction allows a very simple and quick installation or removal of a individually movable

 Strand guide role including the Anzustelleinrichtungen too, because concretely only solved the crosshead of the frame and then the crosshead with the adjusting devices, the roller carrier and the strand guide roller itself from the

Frame must be removed so that a movable

Strand guide roller can be assembled or disassembled even in the installed state of the segment in the strand guide.

In a simple embodiment of an individually displaceable strand guide roller in Anstellrichtung opposite an immovable strand guide roller. According to this embodiment, all strand guide rollers of the subframe (also referred to as

Outer frame) of the fixed side, i. these

Strand guide rollers are as immovable

Strand guide rollers executed, and all

 Strand guide rollers of the upper frame (also referred to as inner frame) of the Losseite, i. These strand guide rollers are designed as individually displaceable strand guide rollers assigned.

In an advantageous embodiment is one

individually movable strand guide roller in

Anstellrichtung another individually movable

Opposite strand guide role. Typically, all strand guide rollers of the upper frame and all

Strand guide rollers of the subframe assigned to each one loose side, thus all strand guide rollers designed as individually displaceable strand guide rollers are. This embodiment is structurally complex, but leaves the individual expansion of all

Strand guide rollers. In addition to the individual

Changeability of all strand guide rollers exists

Another advantage of this embodiment is that all strand guide rollers are individually adjustable to the strand, so that e.g. the over-rotation of the lateral surface of one or more strand guide rollers with a concomitant reduction of the diameter can be easily compensated.

In connection with the two aforementioned embodiments, "opposite" means that two

opposite strand guide rollers have an offset in the thickness direction of the strand to each other, wherein the strand guide rollers optionally also an axial

May have offset in the casting direction.

In one embodiment, the upper or lower frame, which is connected to the individually displaceable strand guide roller, formed of two lateral support frame and one crosshead per strand guide roller, wherein the

lateral support frames each individually movable

Strand guide roller a longitudinal guide device, preferably a longitudinal slot, which extends in the direction of adjustment.

In a simple embodiment, the roller carrier is plate-shaped, wherein the roller carrier over

Guide elements in the longitudinal guide means, preferably the longitudinal slots, the side support frame is guided. This ensures a simple management of the roller carrier and subsequently the strand guide roller, which has a positive effect on the guidance accuracy of

Strand guide role. In a further embodiment, a strand-guiding roller is supported on a plurality of bearings, for example on the roller carrier or on the lower frame, so that high support or

Anstellkräfte can be transmitted with only slight deflection of the roll.

In an advantageous embodiment, each

Roller carrier assigned two adjusting devices, each adjusting device are articulated in the direction of the longitudinal extent of the displaceable strand guide roller within the two outermost bearing on the roller carrier. By means of this embodiment it is possible, on the one hand,

specify different Anstellpositionen or Anstellkräfte on the right and left side and on the other hand, the support or the Anstellkräfte be initiated in a favorable manner by the roller carrier in the adjusting devices. Furthermore, this can be ensured that the

Roller gap on the left and on the right side one, same or different, setpoint corresponds.

Of course it is also possible that the two

Adjusting devices are articulated in the direction of the longitudinal extent of the displaceable strand guide roller outside the two outermost bearing on the roller carrier.

Furthermore, in one embodiment it is also possible that each roller carrier is assigned an adjusting device which is arranged centrally on the roller carrier.

In an advantageous embodiment, a crosshead by means of one, preferably hydraulically operated,

Clamping device connected to a lateral support frame, whereby the time required for changing a crosshead can be reduced.

In an advantageous embodiment, one is

Clamping device an automatic media supply

this is automatically connected in the connection of the crosshead with the or the lateral support frame, whereby an automated (i.e., without manual

Interventions) Connecting or disconnecting the

Media supply lines is possible, so that the time required for changing a crosshead is further reduced.

In one embodiment, an adjusting device is designed as a pressure medium cylinder.

It is advantageous that an adjusting device a

Displacement measuring device for measuring the setting position and / or a force measuring device for measuring the contact force is assigned.

In a simple, robust and accurate embodiment, the force measuring device is a device for measuring at least one hydraulic chamber pressure

Pressure medium cylinder formed.

A highly accurate achievement of a required contact force or a required strand thickness is possible when a control device with a force measuring device, a

Path measuring device (preferably integrated in a hydraulic cylinder) and an adjusting device (preferably a hydraulic proportional or servo valve), e.g. to

Compensation of deflection of the crosshead as a result of the contact force of the adjusting device is connected. It is determined by means of the determined by the force measuring device Anstellkraft converted to the deflection of the crosshead and / or other components, so that the deflection of the crosshead and / or other components via a correction of the setpoint specification for the pitch by means of

Control device can be compensated.

In a further embodiment, a roller carrier at least one stop for calibrating a

Assigned path measuring device. This makes it possible, the module consisting of crosshead, adjusting device,

 Calibrate roller carrier and strand guide roller prior to installation in the strand guide segment, so that the module - if the adjustment device once against the stop - completely calibrated to fully functional is available.

It is advantageous for the invention

 Strand guide segment in a continuous casting plant with an arcuate or horizontal strand guide for producing a strand, preferably with slab or

 Thin slab cross section, to be used in steel. Of course, the invention can also be used in vertical systems or in bloom systems. Further advantages and features of the present invention will not become apparent from the following description

limiting embodiments, reference being made to the following figures, which show the following: Fig. 1 is a perspective view of a

 Strand guiding segment with a fixed side and a loose side

2 is an elevational view of the strand guide segment of FIG. 1 Fig. 3 is an elevation of a strand guide segment with two lot sides

Fig. 4 is a schematic representation of a strand guiding segment with a control device for compensating the deflection of the crosshead as a result of the contact force

1 shows a strand guide segment 1 of an arc casting machine for the production of steel slabs. In the continuous casting machine itself, liquid steel is poured in a mold into an at least partially solidified strand, which is guided, supported and cooled further in the subsequent arcuate strand guide formed by a plurality of strand guide segments which follow one another in the casting direction 2. The strand guide segment 1 has a

 Upper frame 3 and a detachably associated sub-frame 4, wherein all the upper frame 3 associated

Strand guide rollers 5 as individually adjustable

displaceable strand guide rollers 6 and all the sub-frame 4 associated strand guide rollers 5 are designed as non-displaceable strand guide rollers 7. By means of

individually adjustable to the strand displaceable

Strand guide rollers 6, the strand can be targeted, e.g. be treated by a soft-reduction or a pre-rolling, etc., metallurgical, so for example

 - The contact force per displaceable strand guide roller 6 to improve the internal quality within

 Preset limits can be maintained, but also an overload of the movable strand guide roller can be prevented;

 - the marsh tip of the strand on the observation of

Anstellkräfte the sliding strand guide rollers 6 can be determined with high accuracy; - any, ie linear but also non-linear,

 Thickness reductions across the casting 2 of the strand can be achieved. The subframe 4 is connected by means of lateral connecting columns 25 with the upper frame 3, wherein the upper frame 3 is formed of two lateral support frame 12 and one crosshead 11 per displaceable strand guide roller 6. Each displaceable strand guide roller 6 is a module,

comprising a plate-shaped roller carrier 8, two as

Pressure medium cylinder 17 formed adjusting 9 for moving the roller carrier 8 in the Anstellrichtung 10 transverse to the casting direction 2 and a crosshead 11, assigned, wherein the crosshead 11 by means of the clamping devices 16, which can be hydraulically biased, releasably connected to the

side support frame 12 is connected. Each slidable strand guide roller 6 is by means of four bearings 15 on the

Roller carrier 8 rotatably supported, so that high

Anstellkräfte with only small deflections in the

Roller carrier and subsequently introduced into the upper frame 3. The pressure medium cylinder 17 is articulated on the one hand articulated on the crosshead 11 and on the other hand articulated on the roller carrier 8, wherein each pressure medium cylinder 17 in the direction of the longitudinal extension of the displaceable

Strand guide roller 6 is hinged within the two outermost bearing 15 to the roller carrier 8. Due to this modular construction, it is possible to have a single displaceable one

Strand guide roller 6 including the associated

Roller carrier 8, the adjusting devices 9 and the

Crosshead 11 also in the installed state of

Strand guide segment 1 to disassemble or to assemble, so that a high ease of maintenance is given. By virtue of the fact that each roller carrier 8 is assigned a stop 22, it is furthermore possible to remove the module even when it has been removed, ie outside the strand guide segment to calibrate, with a pressure medium cylinder 17 associated

Displacement measuring device after starting a reference position (for example, when it is driven against the stop 22 or the crosshead 11) is completely calibrated available. Alternatively, the calibration can also be outside the

Strand guiding segment done. There are several more

Clamping devices 16 associated with an automatic media supply 24, so that in the connection of the crosshead 11 with a lateral support frame 12 at the same time the

 Media supply lines, for example, for hydraulic, coolant and / or compressed air lines connected. Each plate-shaped roller carrier 11 is by means of at least one guide element 14 in a longitudinal slot 13 designed as a longitudinal guide device per side

 Support frame 12 out, whereby a high guidance accuracy and rigidity is given.

In Fig. 2 is an elevation of the strand guide segment 1 shown in FIG. 1, wherein the cooling nozzles 23, designed as

Water or as water-air nozzles, were also shown with.

Fig. 3 illustrates an embodiment of the strand guiding segment 1 according to the invention, wherein all the strand guiding rollers 5, i. both the strand guide rollers connected to the upper frame 3 and the lower frame 4, as

individually displaceable strand guide rollers 6 are executed. The upper frame 3 is detachably connected by means of a plurality of laterally arranged, connecting columns 25 to the lower frame 4, wherein each of the upper and the lower frame of two lateral support frame 12 and one crosshead each

Strand guide roller 6 is formed. In addition to one

Overload protection of all movable strand guide rollers 6 this embodiment has the advantage that all

Strand guide rollers can be made individually to the strand, so that e.g. if a single one

Strand guide role was over-revved during maintenance to a smaller roll diameter, this

 Diameter reduction in a simple manner by changing the desired position of the adjusting device. 9

can be compensated. FIG. 4 shows a detail of a strand guide segment 1 with a control device 18. In this case, the control device 18 is connected to a displacement measuring device 20 and a force measuring device 19 designed as a pressure medium cylinder 17 adjusting device 9, wherein by means of the control device 18, the deflection of the crosshead 11 due to the contact force of the adjusting device. 9

is compensated. Specifically, the force measuring device 19 provides an actual value of the contact force Fi _st , which by means of a mechanical model, in the control device 18th

is converted to a deflection of the crosshead 11 and optionally other components (such as the roller carrier 8, the lateral support frame 12, the connecting columns 25) As is converted. To that of the control device 18

predetermined setpoint position s _So ii will now be added to As, where on the compensated setpoint value of the set position ^' s = s _SoU + As is regulated. In the scheme is in known

Way ^' s compared with the actual value of the pitch Si _s t, taking into account a control law a

Control value u determined, as the hydraulic valve

trained adjusting device 21 is supplied, so that the value Si _s t the value ^' s as closely as possible corresponds. Specifically, in the compensation of the adjustment position run as a result of a contact force of a displaceable

Strand guiding role following steps:

 - Detecting at least one actual value of a

Anstellposition Si _st by means of a displacement measuring device 20;

- Detecting at least one actual value of an adjusting force F _{I st} by means of a force measuring device 19, wherein the

 Displacement measuring device 20 and the force measuring device 19 an adjusting device 9 a displaceable

 Strand guide roller 6 are assigned;

Supplying a desired value of the setting position s _So ii _{/ of} the actual value of the setting position Si _st and of the actual value of the setting force Fi _st to a control device 18;

 - Determining a deviation of the target value (for example, the

 Sagging of the crosshead 11) of the pitching position As due to the pressing force, taking into account a mechanical model (e.g., bowing of a beam);

Calculation of a compensated setpoint value of

Setting position 7 = s _SoU + As;

- Determining a manipulated variable u by means of the control device 18 taking into account the compensated setpoint value of the Anstellposition ^' s and the actual value of the setting position Sist with the aid of a control law; and

 - Actuation of one of the adjusting device 9

associated adjusting device 21 with the manipulated variable u, so that the actual value of the Anstellposition Si _st the

compensated desired value of the Anstellposition ^' s as possible corresponds. Reference sign list

1 strand guide segment

 2 casting direction

 3 upper frame

 4 subframes

 5 strand guide roller

 6 Individually movable strand guide roller

7 Non-displaceable strand guide roller

 8 roll carriers

 9 adjusting device

 10 adjustment direction

 11 crosshead

 12 Side support frame

 13 longitudinal slot

 14 guide element

 15 bearings

 16 clamping device

 17 pressure cylinder

 18 control device

 19 Force measuring device

 20 path measuring device

 21 adjusting device

 22 stop

 23 cooling nozzle

 24 Automatic media supply

 25 Connecting column u control value

s _So ii setpoint adjustment position

Si _s t actual value setting position

F _T qt Actual value contact force

Claims

claims 1. strand guide segment (1) for supporting and guiding a metal strand with slab cross section in one Strand guide of a continuous casting machine,  - having an upper frame (3) and a lower frame (4), wherein the upper frame (3) is detachably connected to the lower frame (4);  - Wherein several strand guide rollers (5, 6, 7) are respectively connected to the upper frame (3) and the lower frame (4);  - Wherein in the casting direction (2) at least two directly  successively arranged individually displaceable strand guide rollers (6) are individually adjustable against the strand; characterized, in that each individually displaceable strand guide roller (6) has a roller carrier (8), at least one adjusting device (9) for displacing the roller carrier (8) in one Adjustment direction (10) transversely to the casting direction (2) and exactly one transverse to the casting direction (2) arranged crosshead (11) are assigned, wherein the crosshead (11) is detachably connected to the upper frame (3) or the lower frame (4) which is connected to the individually displaceable strand guide roller (6), wherein the adjusting device (9) on the one hand on the crosshead (11) and on the other hand hinged on the roller carrier (8) and the individually movable Strand guide roller (6) is rotatably supported on the roller carrier (8). 2. strand guide segment according to claim 1, characterized characterized in that an individually movable Strand guide roller (6) in Anstellrichtung (10) a non-displaceable strand guide roller (7) is opposite. 3. strand guide segment according to claim 1, characterized in that an individually displaceable Strand guide roller (6) in the adjustment direction (10) a further individually displaceable strand guide roller (6) opposite. 4. strand guide segment according to one of the preceding Claims, characterized in that the upper or Subframe (3, 4), with the individually movable Strand guide roller (6) is connected to two lateral support frame (12) and one crosshead (11) per displaceable strand guide roller (6) is formed, wherein the lateral support frame (12) for each individually displaceable strand guide roller (6) has a longitudinal guide means, preferably a longitudinal slot (13) which extends in the Anstellrichtung (10). 5. strand guide segment according to claim 4, characterized characterized in that the roller carrier (8) is plate-shaped, wherein the roller carrier (8) via Guide elements (14) in the longitudinal guide means, preferably the longitudinal slots (13), the lateral support frame (12) is guided. 6. strand guide segment one of the preceding claims, characterized in that a strand guide roller (5, 6, 7) supported on a plurality of bearings (15). 7. strand guide segment according to claim 6, characterized characterized in that each roller carrier (8) has two Regulating devices (9) are assigned, each Adjusting device (9) in the direction of the longitudinal extension of displaceable strand guide roller (6) within the two outermost bearing (15) are hinged to the roller carrier (8). 8. strand guide segment according to one of claims 2 to 7, characterized in that a crosshead (11) by means of a respective clamping device (16) with a lateral support frame (12) is connected. 9. strand guide segment according to claim 8, characterized characterized in that a clamping device (16) a automatic media supply (24) is assigned, which in the connection of the crosshead (11) with the lateral support frame (12) is automatically connected. 10. strand guide segment according to one of the preceding Claims, characterized in that a Adjustment device (9) as pressure medium cylinder (17) is trained. 11. strand guide segment according to one of the preceding Claims, characterized in that a Adjustment device (9) is associated with a displacement measuring device for measuring the setting position and / or a force measuring device for measuring the contact force. 12. strand guide segment according to one of claims 10 to 11, characterized in that the force measuring device is designed as a device for measuring at least one hydraulic chamber pressure of a pressure medium cylinder (17). 13. strand guide segment according to one of claims 11 to 12, characterized in that a control device (18) with a force measuring device (19), a path measuring device (20) and an adjusting device (21) is connected. 14. strand guide segment according to one of claims 11 to 13, characterized in that a roller carrier (8) at least one stop (22) for calibrating a Path measuring device (20) is assigned. 15. Use of the strand guide segment according to one of the preceding claims in a continuous casting plant with an arcuate or horizontal strand guide for producing a strand, preferably with slab or Thin slab cross section, made of steel.