KR20140026561A - Continuous casting installation with an oscillating device for oscillating a continuous casting mould - Google Patents

Abstract

The present invention relates to a continuous casting facility including a continuous casting mold, a fixed support structure for supporting the continuous casting mold, and a vibration device for vibrating the continuous casting mold in the vibration direction, wherein the vibration device is annular. A first pair (3) of springs consisting of a first spring (4) and an annular second spring (5), the first spring (4) and the second spring (5) being at least partially continuous casting Each mold 1 is enclosed, the second spring 5 being at a first distance 6 from the first spring 4 in the direction of vibration 2. It is an object of the present invention to provide a vibrating device for vibrating the continuous casting mold 1 in which accurate guidance of the mold can be obtained with a compact type of structure and relatively large vibration amplitudes. The object of the invention is that the first spring 4 is fastened to the first quadrant I on the continuous casting mold 1 and to the third quadrant III on the support structure 14, while the other quadrant ( II, IV) are free and the second spring 5 is fastened to the first quadrant I on the support structure 14 and to the third quadrant III on the continuous casting mold 1, The other quadrants II and IV are achieved by the free device.

Description

CONTINUOUS CASTING INSTALLATION WITH AN OSCILLATING DEVICE FOR OSCILLATING A CONTINUOUS CASTING MOULD}

The present invention relates to a continuous casting facility comprising a continuous casting mold, a fixed support structure for supporting the continuous casting mold, and a vibration device for vibrating the continuous casting mold in the vibration direction.

Specifically, the present invention relates to a continuous casting facility comprising a continuous casting mold, a fixed support structure for supporting the continuous casting mold, and a vibration device for vibrating the continuous casting mold in the vibration direction. And a first pair of springs consisting of an annular first spring and an annular second spring, wherein the first spring and the second spring at least partially enclose a continuous casting mold, respectively, wherein the second spring At a first distance from the first spring in the vibration direction. Continuous casting facilities with vibration devices for continuous casting molds are known in principle to those skilled in the art. During continuous casting, the mold is vibrated against the stationary support structure by a vibration device to prevent the casting strands formed in the mold made of liquid metal, preferably steel, from sticking to the mold.

Vibration devices are known for vibrating a continuous casting mold in the direction of vibration from DE 195 47 780 A1, which comprises a fixed support structure for supporting the continuous casting mold and an annular first spring and an annular second spring. Having a first pair of configured springs, the first and second springs respectively enclose a continuous casting mold, the second spring being at a first distance from the first spring in the vibration direction.

Although this vibration device ensures accurate guiding of the mold with respect to the supporting structure, due to the high rigidity of the springs in the vibration direction, larger vibration amplitudes of the mold are possible only by very large springs. Detailed instructions on how the stiffness of the compact vibration device can be reduced in the direction of vibration without compromising the guiding accuracy of the mold to an unacceptable extent cannot be deduced from this publication.

It is an object of the present invention to overcome the problems of the prior art and to provide a vibration device for continuous casting mold vibration, in which accurate guidance of the mold can also be obtained by a very compact vibration device design.

It is an object of the present invention that a first spring is fastened to a first quadrant on the continuous casting mold and to a third quadrant on the support structure, the other quadrants are free, and the second spring is connected to the first quadrant on the support structure. And fastened to a third quadrant on said continuous casting mold, the other quadrants being free.

Here, the continuous casting mold is held in such a way that it can be vibrated by a first pair of one or more springs composed of first and second annular springs relative to the stationary support structure, wherein the mold is driven by the first and second springs. Each is enclosed.

In particular, the first spring is fastened to the first quadrant on the continuous casting mold and to the third quadrant on the support structure, the other quadrants of the first spring being free. The second spring is arranged twisted 180 ° with respect to the first spring so that the second spring is fastened to the first quadrant on the support structure and to the third quadrant on the continuous casting mold and the other quadrants are again free. This results in an exceptionally compact structure that encloses a continuous casting mold. Compared to the perfect clamping of the springs according to the prior art, this results in low rigidity in the vibration direction, but on the other hand, this structure has a high rigidity in the transverse direction with respect to the vibration direction so that a high guiding accuracy of the mold is achieved. However, this does not mean that the annular spring needs to be round. Although circular or oval springs are advantageous for round or n corner casting formats, other shapes are also conceivable. By the specification of the arrangement of the annular springs with respect to each other, the definition of quadrants (ie quadrants of the quadrant system) is the same for all springs; Accordingly, it is assumed that there is no torsion in particular between the quadrants of the first and second annular springs. This defines the arrangement of the annular springs with respect to each other. The vibration device is suitable for both vertical vibration directions (e.g. in connection with straight continuous casting molds), substantially vertical vibration devices (e.g. in relation to bent continuous casting molds) and horizontal vibration direction. .

Preferably, the fastenings of the first spring and the support structure on the continuous casting mold are radially opposed to each other, which applies equally to the second spring.

In particular, in the case of an embodiment suitable for straight molds, the second spring is aligned parallel to the first spring. Thus, in the vertical vibration direction, the springs are arranged in the horizontal planes.

In particular, in the case of an embodiment advantageous for the bent molds, the first and second springs lie on radial lines with a common center point, preferably the center point of the device or the center point of the radius of curvature of the mold.

In an advantageous embodiment, the vibration device comprises a second pair of springs consisting of an annular third spring and an annular fourth spring, wherein the third and fourth springs at least partially enclose the continuous casting mold, respectively. The first pair of springs is at a second distance from the second pair of springs, the third spring is fastened to a first quadrant on the continuous casting mold and to a third quadrant on the support structure, the other quadrants being free And the fourth spring is fastened to the first quadrant on the support structure and to the third quadrant on the continuous casting mold, the other quadrants being free.

As an alternative thereto, the vibration device comprises a second pair of springs consisting of an annular third spring and an annular fourth spring, the third spring and the fourth spring at least partially enclosing the continuous casting mold, respectively. The first pair of springs is at a second distance from the second pair of springs, the third spring is fastened to a first quadrant on the support structure and to a third quadrant on the continuous casting mold, the other quadrants being free And the fourth spring is fastened to a first quadrant on the continuous casting mold and to a third quadrant on the support structure, the other quadrants being free. The latter embodiment has particularly high guiding accuracy in the transverse direction to the vibration direction.

Furthermore, with a compact arrangement which is particularly favorable for the initiation of moments, a vibration drive for initiating or maintaining the oscillation is arranged between the first pair of springs and the second pair of springs.

It is also favorable that an electromagnetic stirrer is arranged in the casting direction under the first pair of springs or the second pair of springs.

Particularly compact designs can be achieved if the continuous casting mold is embodied for casting billet or bloom cross sections.

The first and second springs preferably have a cross section enclosed in a plane perpendicular to the vibration direction. However, it is also possible for the member of at least one of the first spring group and the second spring group to have an open cross section, for example as a slotted spring in the transverse direction, in a plane perpendicular to the vibration direction.

The second distance is greater than the first distance, and preferably the second distance can be embodied five to twenty times greater than the first distance.

Bending stresses in the springs remain particularly low if at least one member of the first, second, third and fourth spring groups is configured in a layer-wise manner. Can be. The layered method is to be understood as meaning a spring formed from a plurality of separate springs arranged one on top of the other at a distance from each other.

Further advantages and features of the present invention can be derived from the following description of non-limiting exemplary embodiments, with reference to the following figures.

1 is a perspective view of a first embodiment of a vibrating device for a continuous casting mold for casting steel casting strands having a billet cross section.
2, 3 and 4 are a front elevation, a top view and a side elevation of FIG.
5 is a cross-sectional view taken along the intersection line AA of FIG. 2.
6 is a perspective view of a second embodiment of a vibrating device for a continuous casting mold for casting steel casting strands having a billet cross section.
7, 8 and 9 are front elevation, plan view and side elevation of FIG. 6.
FIG. 10 is a cross-sectional view taken along the intersection line AA of FIG. 7.
FIG. 11 is a cross-sectional view taken along the intersection line BB of FIG. 9.
12 shows an alternative to FIG. 3 with a slotted spring.

A first embodiment of a vibrating device for vibrating the continuous casting mold 1 in the vibration direction 2 shown in FIGS. 1 to 5 consists of a first spring 4 consisting of a first spring 4 and a second spring 5. It has a second pair 7 of springs consisting of one pair 3 and a third spring 8 and a fourth spring 9. All springs 4, 5, 8, 9 are embodied as annular; Each of these springs encloses the mold 1 and is arranged in a normal plane perpendicular to the direction of vibration 2. The first spring 4 is at a distance 6 with respect to the second spring 5 and the third spring 8 is at a distance 6 with respect to the fourth spring 9. The first spring 4 is connected to the continuous casting mold in the first quadrant I by the first spring retainer 11 and in the opposite direction in the radial direction, the second spring retainer 12 in the third quadrant III. Connected to the support structure 14 by means of; The other quadrants (II, IV) are free. The second spring 5, arranged below and in parallel with the first spring 4, is fastened to the first quadrant I on the support structure and to the third quadrant III on the continuous casting mold, and to the other quadrant II. , IV) are free again. Below the first pair of springs 3, a second pair 7 of springs consisting of a third spring 8 and a fourth spring 9 is arranged at a second distance 10, where the second distance is 10 times the first distance (6). Here, the third spring 8 such as the first spring 4 and the fourth spring 9 such as the second spring 5 are connected to the mold 1 and the support structure.

Under the second pair of springs 7, it will also be possible to further arrange a further pair of springs, for example a third pair of springs. In addition, it would be possible to arrange a second pair 7 of springs twisted by 90 ° or 270 ° relative to the first pair 3 of springs.

6 to 11 show a second embodiment of a vibrating device for vibrating the continuous casting mold 1, which vibrating device comprises a first pair of springs 3, a second pair of springs 7 and a third one. In each case offset by distance 15, it has a spring and a third and fourth pair of springs. The first pair of springs 3 is connected to the support structure 14 via the second spring retainer 12 and to the continuous casting mold 1 via the first spring retainer 11 and vice versa in the radial direction. It consists of one spring (4). The second spring 5 is arranged twisted by 180 ° with respect to the first spring 4. The second pair 7 of springs consists of a third spring 8 and a fourth spring 9, wherein the third spring 8 is arranged twisted by 90 ° with respect to the first spring. The fourth spring 9 is arranged twisted by 180 ° with respect to the third spring 8. Below the first pair 3 of springs and the second pair 7 of springs, a third pair and a fourth pair of springs are arranged at a distance 15, wherein the arrangement of the third pair of springs is Corresponding to one pair, the arrangement of the fourth pair of springs corresponds to the second pair of springs.

FIG. 12 shows an alternative to FIG. 3 with a slotted first spring 4. Here, the annular first spring 4 is embodied as slotted in the radial direction in the fastening area with the support structure 14, where the second spring retainer is also as the left spring retainer 12a and the right spring retainer 12b. ), It is embodied in two parts. The use of open cross sections of the annular springs makes it possible to further reduce the rigidity of the vibration device in the vibration direction. Obviously, the embodiment of the open cross sections with springs is by no means limited to the first spring 4, but instead each spring can be embodied, for example, slotted.

1: continuous casting mold
2: vibration direction
3: first pair of springs
4: first spring
5: second spring
6: first street
7: second pair of springs
8: third spring
9: 4th spring
10: second street
11: first spring retainer
12, 12a, 12b: second spring retainer
13: water jacket
14: support structure
15: third street
16: third pair of springs
17: fourth pair of springs
I: first quadrant
II: second quadrant
III: the third quadrant
IV: fourth quadrant

Claims (12)

Continuous casting mold (1),
A fixed support structure 14 for supporting the continuous casting mold 1, and
A continuous casting installation comprising a vibration device for vibrating the continuous casting mold 1 in the vibration direction 2,
The vibration device comprises a first pair of springs 3 composed of an annular first spring 4 and an annular second spring 5, the first spring 4 and the second spring 5. Respectively encloses the continuous casting mold 1 at least partially, the second spring 5 being at a first distance 6 from the first spring 4 in the vibration direction 2. In
The first spring 4 is fastened to the first quadrant I on the continuous casting mold 1 and to the third quadrant III on the support structure 14, the other quadrants II and IV being free. ,
The second spring 5 is fastened to the first quadrant I on the support structure 14 and to the third quadrant III on the continuous casting mold 1, the other quadrants II and IV being free. Characterized in that
Continuous casting equipment.
The method of claim 1,
Said second spring 5 is characterized in that it is aligned parallel to said first spring 4,
Continuous casting equipment.
The method of claim 1,
The first spring 4 and the second spring 5 lie on radial lines,
Characterized in that the radial lines have a common center point,
Continuous casting equipment.
4. The method according to any one of claims 1 to 3,
The device comprises a second pair 7 of springs consisting of an annular third spring 8 and an annular fourth spring 9, wherein the third spring 8 and the fourth spring 9 are At least partially enclose the continuous casting mold 1, the first pair of springs 3 being at a second distance 10 from the second pair of springs 7,
The third spring 8 is fastened to the first quadrant I on the continuous casting mold 1 and to the third quadrant III on the support structure 14, the other quadrants II and IV being Free
The fourth spring 9 is fastened to the first quadrant I on the support structure 14 and to the third quadrant III on the continuous casting mold 1, the other quadrants II and IV being free. Characterized in that
Continuous casting equipment.
4. The method according to any one of claims 1 to 3,
The device comprises a second pair 7 of springs consisting of an annular third spring 8 and an annular fourth spring 9, wherein the third spring 8 and the fourth spring 9 are At least partially enclose the continuous casting mold 1, the first pair of springs 3 being at a second distance 10 from the second pair of springs 7,
The third spring 8 is fastened to the first quadrant I on the support structure 14 and to the third quadrant III on the continuous casting mold 1, the other quadrants II and IV being free. ego,
The fourth spring 9 is fastened to the first quadrant I on the continuous casting mold 1 and to the third quadrant III on the support structure 14, the other quadrants II and IV being It is characterized by being free,
Continuous casting equipment.
The method according to claim 4 or 5,
Characterized in that a vibration drive for initiating or maintaining the vibration is arranged between the first pair 3 of springs and the second pair 7 of springs,
Continuous casting equipment.
7. The method according to any one of claims 1 to 6,
It is characterized in that an electromagnetic stirrer is arranged in the casting direction under the first pair 3 of springs or the second pair 7 of springs,
Continuous casting equipment.
The method of claim 1,
The continuous casting mold 1 is characterized in that it is embodied for casting billet or bloom cross sections,
Continuous casting equipment.
The method of claim 1,
Said first spring 4 and second spring 5 have a cross section enclosed in a plane perpendicular to the direction of vibration 2,
Continuous casting equipment.
The method of claim 1,
The member of at least one of the first spring 4 and the second spring 5 group has an open cross section in a plane perpendicular to the vibration direction 2,
Continuous casting equipment.
11. The method according to any one of claims 4 to 10,
The second distance 10 is greater than the first distance 6, preferably characterized in that the second distance 10 is 5 to 20 times larger than the first distance 6,
Continuous casting equipment.
12. The method according to any one of claims 1 to 11,
At least one member of the group of the first spring 4, the second spring 5, the third spring 8 and the fourth spring 9 is configured in a layer-wise manner. Continuous casting equipment.

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