EP2275216B1 - Device for oscillating a continuous casting mold - Google Patents

Description

The invention relates to a means for oscillating a continuous casting mold in a plant for a continuous casting of metals, comprising essentially a stationary holding part and a with this means axgleich directed clamping element pairs held perpendicular to the strand axis, movable by an oscillating mold mold.

Continuous casting plants or facilities for continuous casting of steel have one or more oscillating continuous casting mold (s) connected to oscillating frames, which (according to the prior art) are held by springs or clamping elements extending transversely to the casting direction on both sides. In this case, the continuous casting mold or the oscillating frame is in two planes respectively opposite to the clamping elements, also called springs, fixed in one point, wherein the free ends of the elements or springs are in communication with a support frame. Such Oszillationssysteme are known for continuous casting-Abblegeanlagen and continuous casting sheet systems and have mechanical or hydraulic oscillating drives.

An oscillating frame of a continuous casting plant can also be formed in a plant-specific embodiment variant by two synchronously movable mold saddles, with which the supports of the Kolkillenhalterung are connected.

Clamping elements for a continuous casting mold oscillation may essentially be designed as flat springs or as membrane springs and consist of metal or fiber-reinforced plastics.

The leaf springs or clamping elements are each connected at half the length with the vibrating frame or mold saddles carrying the mold, the ends of which are articulated or clamped on the stationary holding part or base frame.

However, it can also be used single springs or the like clamping elements, but it is essential that these parts are arranged in pairs and axgleich directed and an equal length and the same Have elongation characteristic.

Same and in their longitudinal direction equal flat springs or flat clamping elements impart the Kokille due to high elastic stresses across the casting direction in the spring longitudinal direction a high Führungsstabllität in an oscillatory motion. Normal to the longitudinal direction of the elements transverse to the casting axis also causes the width, ie the bending resistance, in the width direction of the clamping elements, the stability of the directed oscillation of the mold.

However, flat and wide clamping elements have the disadvantages that they can not be subjected to a bias voltage in the transverse direction and can twist.

It is possible that during casting between parts of the mold walls and the casting strand differently large frictional forces occur, which may affect the oscillatory motion of the swing frame. It can come in unfavorable cases to a so-called tumbling of the mold, which movement can possibly amplify or rocking, come.

A tumbling of the mold is in a transverse movement of the same to the casting direction, ie, that the four corners of the mold do not reach their upper or lower end position of the oscillation simultaneously.

From the WO 2007/096389 A1 is an oscillating device for continuous casting molds consisting of a stationary holding part, which carries a mold with cooling plates, known, wherein substantially the mold with elastic parts is guided transversely to the casting direction and having an oscillation drive for a vertical movement, wherein the mold in two parallel planes through elastic rods is held.

An oscillating table for a continuous casting mold consisting of a movable part in a supporting support part, wherein the movable part is guided with the mold by elastic elements, discloses the WO 2007/096421 A1 ,

A liquid - cooled mold for the continuous casting of metals, the construction of which aims in particular at a reduction of the mass to be moved in order to be able to set higher vibration numbers with the least possible force requirement, is known from US Pat EP 468 607 A1 known.

The invention is an object of the invention to provide a means for oscillation of a continuous casting mold in a plant for the continuous casting of metals, which increases the stability of the oscillatory motion of the mold-carrying swing frame or the Kokillensattel and prevents any tumbling motion of the mold.

This object is achieved in that the stationary holding part of two base frames, which are connected by means of frame member is formed and in the base frame in Strangachsrichtung each a moving part of the Kokillensattel or Kokillenrahmens is positioned, which move parts cooperate on the one hand with an established in the base frame oscillation drive and the moving parts on the other hand by means of leading pairs of clamping elements are held transversely to the casting direction in two vertically spaced horizontal planes per base frame, wherein at least two clamping element pairs are aligned identically for each holding plane and at least one further pair of clamping elements per plane of the holders to the aforementioned clamping element pairs with an angle of 90 ° Turned is positioned.

With an alignment of at least one pair of the clamping elements according to the invention rotated by 90 ° relative to the other elements, it has been found that the stability of the movement of the saddles or of the oscillating frame in the casting direction is substantially increased.

In this case, any cross-sectional shapes for an advantageous design of the leading clamping elements can be provided in order to achieve, for example, a long service life and low risk of breakage.

This arrangement of the clamping elements according to the invention, a particularly accurate guidance of the swing frame or Kokillensattel is possible, with different frictional forces between strand surface and mold wall, for example, disturbances of Gießmittelzuführung or casting of alloyed steels, do not cause transverse movements of the mold to the direction of slip.

If in a favorable manner a pair of clamping elements is formed from four or six individual parts, on the one hand an economic storage can be achieved and on the other hand such an advantageous introduction of force in the swing frame or in the Kokillensattel and the stationary base frame is possible.

Advantageously, the clamping element pairs with the same longitudinal extent are the same size and have the same material properties. In this way, the articulation point on the oscillating frame or mold saddle remains exactly in the casting direction even with a bias of the elements in the course of an oscillatory movement.

The advantage of this embodiment consists essentially in that a distancing of the clamping elements of the cast strand reduces heat input of these elements and space for the strand guide and the spray cooling creates and conveniently a compound of Oszillationsantriebes with the base frame and the swing frame with respect to a precise oscillation movement promotes.

In the following, the invention will be explained in more detail with reference to a drawing illustrating only one embodiment.

• Fig. 1 Teil einer Stranggießanlage mit Kokille
• Fig. 2 Grundrahmen
• Fig. 3 Grundrahmen mit Kokillensättel

In a perspective view:

• Fig. 1 Part of a continuous casting plant with mold
• Fig. 2 base frame
• Fig. 3 Base frame with mold saddles

For the time being, it should be pointed out that continuous casting plants with a stationary holding part or base frame and a vibrating frame carrying a mold can also be formed in two parts by mold calipers.

Bezugszeichenilste:

10, 1, 1 '

base frame

2, 2 '

Kokillensattel

21, 21 '

movement actuator

3

mold

5, 5 '

oscillatory

6, 6 ', 6 ", 6'"

Clamping element pair axgleich aligned

7, 7 ', 7 ", 7'"

Unequal alignment of the clamping element pair

Fig. 1 schematically shows a part of a continuous casting with an oscillatable mold 3 and a strand 4. A base frame 10, 1,1 ' is designed as a stationary holding part and connected to anchored in a foundation, supporting equipment parts.

A mold 3 is connected on both sides with a respective Kokillensattel 2, 2 ', through which also a cooling water supply can take place.

Each Kokillensattel 2, 2 ' has a substantially vertical movement 21, 21' , which passes through a base frame 1,1 ' and at the lower end with an oscillating drive 5 , 5' cooperates.

In the base frame 1,1 ' are arranged in two planes clamping elements 6,6', 6 ", 6 '" transverse to the casting axgleich aligned, which elements each in its half length with a moving position 21, 21' of the Kokillensattels 2, 2 ' are and thus result in pairs of clamping elements.

Perpendicular to the axgleichen alignment of the clamping element pairs 6, 6 ', 6 ", 6"' in two levels more clamping element pairs 7, 7 ', 7 ", 7'" arranged, which an oscillation of the moving parts 21, 21 'of the Kokillensättel 2, 2nd ' stabilize.

In Fig. 2 is a schematic perspective view of a base frame 10, 1, 1 'shown with a movement 21 of a Kokillensattels. Centrally in a base frame 1, a moving part 21 is positioned, which is moved by a Oszillatloristell 5.

Leading clamping element pairs 6, 6 ', 6 ", 6'" are axgleich aligned, arranged in two planes in the base frame 1 and halfway with the moving part 21 (Koklliensattel is not shown).

Transversely to the casting direction or transversely to the axial direction of the movement actuator 21, but offset in the mounting plane are rotated by an angle of 90 ° to the clamping element pairs 6, 6 ', 6 ", 6'" , more clamping element pairs 7, 7 ', 7 " . 7 '" positioned in the base frame and hinged centrally on the moving part 21 .

In Fig. 3 an oscillating part of a continuous casting device without mold is shown schematically. Two base frames 1, 1 ' are connected via frame members 10 and placed on a stationary investment cell.

The Kokillensättel 2, 2 ' carry a mold (not dargastellt), which saddles are moved by oscillating drives 3, 3' simultaneously.

Transverse to the casting direction are on the one hand clamping element pairs 6, 6 ', 6 ", 6'" axgleich directed arranged and on the other hand clamping element pairs 7, 7 ', 7 ", 7'" provided in a direction rotated by 90 °.

Claims (3)

1. A means for oscillating a strand casting die (3) in a system for continuous casting of metals, essentially comprising a fixed retaining part and a die being supported by the same perpendicular to the strand axis by means of squarely aligned clamping element pairs (6, 6', 6", 6'"), and being movable by means of an oscillation drive, wherein the die is being supported via pivoting frames or die saddles (2, 2'), wherein the fixed retaining part is embodied of two base frames (1, 1') being connected by means of frame elements (10), and wherein a moving part (21, 21') of the die saddles (2, 2'), or of a die frame, respectively, is each positioned in the base frame (1, 1') in the strand axis direction, which moving parts (21, 21') each interact with an oscillation drive (5, 5') fixed in the base frame (1, 1') on one hand, and the moving parts (21, 21') are supported in two horizontal planes per base frame (1, 1'), which are at a vertical distance to each other, by means of guiding clamping element pairs transversely to the casting direction, wherein at least two clamping element pairs (6, 6', 6", 6'") are aligned equally per support plane, and at least one additional clamping element pair (7, 7', 7", 7"') is positioned at a 90° angle per plane of the mounts in a pivoted manner toward the above clamping element pairs (6, 6', 6", 6'").
2. The means according to claim 1, wherein a clamping element pair (6, 6', 6", 6'") is made up of four or six individual elements.
3. The means according to one of the claims 1 or 2, wherein the clamping element pairs are embodied between the moving part (21, 21') and the base frame (1, 1) at an equal longitudinal extension, having equal dimension, and equal material properties.

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