EP3623077B1 - Oscillation device and corresponding method and computer program product for operating an oscillation device - Google Patents

Description

The invention relates to a method and a computer program product for operating an oscillation device for a continuous casting mold within a continuous casting plant for producing a cast strand. The invention can be used in billet, billet, BBL, slab and thin slab continuous casting plants. Such continuous casting plants can be designed as vertical bending, arched or vertical slab plants.

The invention also relates to an oscillation device which is operated according to the method according to the invention. Known oscillation devices typically use hydraulic or electromechanical drives or adjusting elements to oscillate the mold.

State of the art:

In order to counteract the friction of the strand shell on the mold plates, the continuous casters work with oscillating molds. The high-quality production of cast products requires a defined speed profile of the mold oscillation as a function of certain casting parameters.
The allocation criterion / selection criterion (the oscillation curve progression) is preferably the steel quality to be cast (steel analysis of the melt that is to be cast) and the casting speed.

The selected oscillation curve course (speed course) is then used for the production of a steel quality together with the variable Production parameter "casting speed" used. A dynamic adjustment of the stroke height and stroke frequency then takes place depending on the casting speed.

Thus, i.a. A specific setting of a "negative strip value" is also possible.

Negative strip is the time range in which the mold exceeds the set casting speed in speed (with the direction of movement of the oscillation in the production direction of the strand produced, i.e. with the direction of the casting speed).

The negative strip is usually given as a percentage of an entire oscillation period. The oscillation curve of the oscillation speed is the basis and basis for the further dependencies and settings mentioned.

The procedural background for the course of the oscillation movement is a targeted reduction of the friction between the strand shell on the copper plates of the mold during the oscillation movement. The oscillating movement favors the feeding of the gap between the strand and the mold plates with casting powder, casting granulate or liquid lubricants (e.g. oil). The properties (including the viscosity and the melting behavior) of the lubricant used (e.g. casting powder) can therefore also represent a supplementary selection criterion for the choice of the oscillation curve and its parameters.

The stroke amplitudes of the mold are, for example, in a typical range of around ± 3 mm (with goat speeds around 1 m / min). In the case of a sinusoidal periodic course of the oscillation curve, a mold stroke frequency in the range of up to approx. 70 strokes per minute per m / min casting speed is set.

From the WO-2016/162141 A1 For example, the following is known: Liquid metal is poured into a continuous casting mold of the continuous caster. The liquid metal solidifies on the side walls of the continuous casting mold to form a strand shell. The strand shell is withdrawn from the continuous casting mold with or without a still liquid core in a casting direction at a casting speed by means of a withdrawal device of the continuous casting plant. The continuous casting mold is moved periodically in the casting direction by means of an oscillation device of the continuous casting plant. The oscillation device is controlled by a control device of the continuous casting plant. In a first time segment of the period, the movement of the continuous casting mold is a harmonic oscillation on which a speed offset is superimposed. In a second time segment of the period, the movement takes place at a constant speed. An oscillation is called harmonic, the course of which can be described by a sine function.

From the DE-19742794-A1 another solution for the oscillatory movement is known. In comparison to a simple sinusoidal or non-sinusoidal oscillation with a comparable frequency and amplitude, the heat transfer in the mold and thus the shell formation can be controlled and thus the quality of the cast product can be specifically improved. For this purpose, it is proposed that at any given strand withdrawal speed, the zero line of the mold vibrations is moved upwards and / or downwards (by a second superimposed vibration) relative to the position of the bath surface during the casting process.

In the DE-19854329-A1 a method for oscillating a continuous casting mold using variable oscillation parameters is also described. The invention described there relates to a method for oscillating a continuous casting mold by means of vertically reciprocating movements in the casting direction or in the opposite direction, whereby the stroke and frequency of the oscillation are adjustable parameters according to the casting speed and when the mold is advancing relative to the strand, the so-called negative strip, liquid and / or solid casting medium is drawn into the gap between the mold and strand.

The previously known solutions have the following disadvantages:
The oscillation curves (speed profiles) described so far in the prior art are often sinusoidal, have a sinuid character, have a sinusoidal component or are complex curve profiles over a temporal profile of the oscillation movement.

The generation of an oscillation curve speed profile is associated with a lot of effort. The speed curves can only be generated to a limited extent through specifically created machine code. Transferring the courses via data storage media (from the creation system to the control) is cumbersome and time-consuming.

Since sinusoidal curve progressions also restrict the degrees of freedom of curve generation, the procedural specifications with the possibilities previously known in the prior art are limited.

The invention is based on the object of developing a known method and computer program product for operating an oscillation device for a continuous casting mold and a known corresponding oscillation device in such a way that individual oscillation speed curves can be specified for a specific application or casting order and implemented in the oscillation device.

• Vorgeben eines beliebigen Geschwindigkeitsverlaufs für die Oszillation über der Periode;
• Berechnen der Flächeneinhalte der von dem Geschwindigkeitsverlauf und der x-Achse innerhalb der Periode eingeschlossenen positiven und negativen Teilflächen oberhalb und unterhalb der x-Achse;
• Prüfen, ob die Flächeninhalte der positiven und negativen Teilflächen gleich groß sind; und
• falls ja: Ermitteln des Hubverlaufs für die Stranggießkokille durch Integrieren des Geschwindigkeitsverlaufs mit den gleich großen Teilflächen oberhalb und unterhalb der x-Achse über der Periode.

In terms of process engineering, this object is achieved by the method claimed in claim 1. This is characterized in that the stroke course with which the continuous casting mold is oscillated is determined as follows:

• Presetting any speed profile for the oscillation over the period;
• Calculating the area contents of the positive and negative partial areas above and below the x-axis enclosed by the speed profile and the x-axis within the period;
• Check whether the areas of the positive and negative partial areas are equal; and
• If so: Determine the stroke profile for the continuous casting mold by integrating the speed profile with the partial areas of equal size above and below the x-axis over the period.

• den Schmiermitteleinzug zwischen Innenwand der Kokille und sich bildender Schale des Gießstrangs in der Kokille zu verbessern bzw. dort die Reibung zu reduzieren;
• die Oberflächenqualität eines Gießstrangs durch die Beeinflussung der Oszillationsmarken (dies sind die Abdrücke die durch die Oszillationsbewegung auf der Strangoberfläche entstehen) in ihrer Ausprägung (Tiefe und Verlauf) zu optimieren bzw. zu verbessern; und
• den Oszillationsgeschwindigkeitsverlauf so zu gestalten, dass eine Anregung von möglichen unerwünschte Resonanzen (insbesondere die Vermeidung von Sinusschwingungen als Anregungsschwingung) bei Einrichtungen in unmittelbarer Nähe der Oszillation (z.B. Kokille, Gießbühne, Strangführung, Segmente) vermieden wird.

The claimed method offers the advantage that any, ie freely predeterminable and freely parameterizable speed curves for the oscillation of the continuous casting mold can be specified, as is increasingly required by process engineering and metallurgy. This claimed specification of any speed curves, adapted for a specific casting task, offers the following options:

• to improve the penetration of lubricant between the inner wall of the mold and the shell of the cast strand that is being formed in the mold or to reduce the friction there;
• to optimize or improve the surface quality of a cast strand by influencing the oscillation marks (these are the imprints that are created by the oscillating movement on the strand surface) in terms of its expression (depth and course); and
• to design the oscillation speed curve in such a way that an excitation of possible undesirable resonances (in particular the avoidance of sinusoidal oscillations as excitation oscillation) is avoided in devices in the immediate vicinity of the oscillation (e.g. mold, casting platform, strand guide, segments).

In the context of the invention, the term "x-axis" typically means a time or angle axis, i. H. the speed curve V for the oscillation is given for the present invention preferably in the form of a V (t) or V (α) curve. Likewise, the stroke profile is also preferably indicated over time or over the angle, more preferably within a period. A conversion of the abscissa from a temporal dimension to an angular dimension and vice versa is possible at any time. This means that one cycle of an oscillating movement corresponds to 360 ° in the angle representation and - analogously to this - a period time T in the time representation.

The claimed test step, in which it is checked whether the surface area of the positive and negative partial areas of the given speed profile are the same, is necessary because only if this condition is met is it guaranteed that the mold is not successively offset in height by the oscillation. Conversely, this would have the disadvantage that if the partial areas are of different sizes, the mold would then be gradually offset in height by the oscillation, which is not wanted.

Claim 1 initially relates to the case in which the predetermined speed profile is predetermined from the outset in such a form that its partial areas above and below the x-axis actually have the same area.

According to a first exemplary embodiment, the case is dealt with in which, with the arbitrarily predetermined speed profile for the oscillation, the partial areas above the x-axis are actually not the same. In this case, a correction of the speed profile is required, as claimed in claim 1, in order to produce the equality of the partial areas and in order to prevent said undesired height displacement of the mold due to the oscillation.

According to a further exemplary embodiment of the invention, the speed profile can be specified in the form of a continuous curve profile or in the form of at least three support points over a period. In the latter case, the correspondingly specified speed profile is then preferably determined by interpolation, for example by linear interpolation.

According to a further exemplary embodiment of the invention, it is advantageous if the stroke profile for the mold determined by integration is converted to a maximum desired oscillation amplitude, for example specified in the unit mm, and / or a desired stroke frequency, i.e. H. is normalized.

The predetermined speed profile for the oscillation preferably also contains a range or a time interval in which the oscillation speed in the casting direction is greater than the casting speed. This area is then the area of the “negative strip”, as described above in the prior art with associated advantages.

The predefined speed profile can also be arbitrary insofar as it does not have just one, but a plurality of zero crossings, not just an absolute but also at least one local maximum and / or not only has an absolute minimum but also, for example, at least one local minimum.

The above-mentioned object is also achieved by a computer program product according to claim 8 and an oscillation device according to claim 9. The advantages of these two solutions correspond to the advantages mentioned above with reference to the claimed method.

The claimed oscillation device preferably has an input device for manually specifying the arbitrary speed profile in the form of at least three support points over a period. For this purpose, the input device preferably has a display device which offers the possibility of being able to graphically specify the speed profile or the support points representing the speed profile and also to graphically display an interpolation of the support points to the speed profile for an operator. In addition to the predetermined speed profile, the display device preferably also shows the speed profile shifted to compensate for the positive and negative partial areas and / or the ultimately calculated stroke profile for the operator at least during one period. As an alternative or in addition to the manual input option, the oscillation device can also have a data interface for specifying the speed profile z. B. via memory stick or network interface.

Figur 1

die erfindungsgemäße Oszillationseinrichtung;

Figuren 2a und 2b

das erfindungsgemäße Verfahren zum Betreiben der Oszillationsvorrichtung;

Figur 3

die Vorgabe des Geschwindigkeitsverlaufes in Form von Stützpunkten;

Figur 4

mögliche verschiedenartige vorgebbare Geschwindigkeitsverläufe pro Periode; und

Figur 5

die Interpolation des Geschwindigkeitsverlaufs und den "Negativ Strip"

veranschaulicht.The description is accompanied by a total of 5 figures, with

Figure 1

the oscillation device according to the invention;

Figures 2a and 2b

the inventive method for operating the oscillation device;

Figure 3

the specification of the speed profile in the form of support points;

Figure 4

possible different types of predeterminable speed curves per period; and

Figure 5

the interpolation of the speed curve and the "negative strip"

illustrated.

The invention is described in detail below with reference to the figures mentioned in the form of exemplary embodiments. In all figures, the same technical elements are denoted by the same reference symbols.

Figure 1 shows the oscillation device 100 according to the invention. This oscillation device 100 serves to oscillate a continuous casting mold 210 of a continuous casting plant 200. In addition to the continuous casting mold 210, the continuous casting plant 200 essentially also comprises a strand guide device 220 located downstream of the continuous casting mold 210 in the casting direction R.

In particular, during a casting process for producing the cast strand 300, the mold 210 is set in oscillation with the aid of the oscillation device 100, ie in vibrations in and against the casting direction R. This direction of oscillation is in Figure 1 illustrated by the vertical double arrow next to the mold 210. In the casting operation, the mold 210 is filled with a metal melt. Inside the mold 210, the melt solidifies on the cooled walls of the mold and a cast strand 300 is formed with an initially still liquid core. This cast strand is pulled down from the mold and deflected from the vertical to the horizontal with the aid of the strand guide device 220. The oscillation of the mold serves to reduce the friction between the cast strand and the walls of the mold.

The oscillation device comprises at least one, typically 2 adjusting elements, for example in the form of hydraulic cylinders or electromechanical lifting elements for oscillating the continuous casting mold. These adjusting elements 110 are controlled with the aid of a control device 120 via an adjusting signal S in such a way that a stroke profile, represented by the adjusting signal, is set for the oscillation of the mold 210.

According to the invention, this stroke profile is calculated in advance of the oscillation from an arbitrarily or freely specified (oscillation) speed profile for the oscillation by a calculation device 130.

For this determination or calculation of the stroke profile, the method according to the invention provides that in FIG Figures 2a and 2 B illustrated step sequence.

Process step 1:

At the beginning of the method according to the invention, a desired speed profile for the oscillation of the mold is first specified, be it as a continuous curve or in the form of at least three support points per period. It is sufficient to consider a period because the oscillation, as the name implies, is periodic.

The specification of the support points can be made in tabular form, as shown in the table in Figure 2a illustrated next to step 1.

Process step 2:

This method step provides that if the speed profile is specified initially only in the form of support points, these support points are interpolated to form a continuous curve. This interpolation can be done linearly, for example, as shown in FIG Figure 2a is illustrated in the graphic representation next to method step 2.

A basic curve profile of an oscillation period can now be freely set e.g. via the variably settable support points of the desired oscillation speeds and the associated angles. can be entered in table form. Alternatively, a graphical input is possible. The support points are then connected to one another (automatically in terms of the program) via a linear point connection, i.e. H. interpolated.

The connection between two speed points, each consisting of the coordinates speed and angle or time result in a linear function (in the coordinate system) for a section between two angles (or support points) of the speed curve of the oscillation.

• f(x) = Funktionsverlauf in Abhängigkeit von x
• m = Steigung der linearen Funktion
• x = Variable
• n = Konstante
• entspricht $$\mathrm{f}\left(\mathrm{\alpha }\right)=\left({\mathrm{<figure-callout\; id="3"\; label="v"\; filenames="imgf0002.png,imgf0003.png"\; state="\{\{state\}\}">v</figure-callout>}}_3-{\mathrm{<figure-callout\; id="2"\; label="v"\; filenames="imgf0002.png,imgf0003.png"\; state="\{\{state\}\}">v</figure-callout>}}_2\right)/\left({\mathrm{<figure-callout\; id="3"\; label="\alpha "\; filenames="imgf0002.png,imgf0003.png"\; state="\{\{state\}\}">\alpha </figure-callout>}}_3-{\mathrm{<figure-callout\; id="2"\; label="\alpha "\; filenames="imgf0002.png,imgf0003.png"\; state="\{\{state\}\}">\alpha </figure-callout>}}_2\right)\mathrm{\alpha }+{\mathrm{<figure-callout\; id="1"\; label="V\; c"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">V</figure-callout>}}_{\mathrm{c}}$$
  
• für die Beispielstützpunkte 2 und 3, siehe Figur 3. Für Figur 3 gilt folgende Legende:

  V

  = Oszillationsgeschwindigkeit

  t

  = Zeit

  T

  = Periodenzeit einer Schwingung, Oszillationsperiode

  T₁

  = Oszillationskurvenanteil entgegen der Gießgeschwindigkeitsrichtung

  T₂

  = Oszillationskurvenanteil in Gießgeschwindigkeitsrechnung

  1/2T

  = Halbe Periodenzeit

  A₁

  = Flächenanteil (integrierter Weg, Aufwärtsbewegung)

  A₂

  = Flächenanteil (integrierter Weg, Aufwärtsbewegung

  (1)

  = Stützpunkt (Geschwindigkeit und Zeit)

  V_G

  = Gießgeschwindigkeitsrichtung

In mathematics, a linear function is referred to as a linear normal function in this case, therefore corresponds to the following formula principle: $$\mathrm{f}\left(\mathrm{x}\right)=\mathrm{mx}+\mathrm{n}$$

• f (x) = function curve depending on x
• m = slope of the linear function
• x = variable
• n = constant
• corresponds $$\mathrm{f}\left(\mathrm{\alpha }\right)=\left({\mathrm{v}}_3-{\mathrm{<figure-callout\; id="2"\; label="v"\; filenames="imgf0002.png,imgf0003.png"\; state="\{\{state\}\}">v</figure-callout>}}_2\right)/\left({\mathrm{\alpha }}_3-{\mathrm{<figure-callout\; id="2"\; label="\alpha "\; filenames="imgf0002.png,imgf0003.png"\; state="\{\{state\}\}">\alpha </figure-callout>}}_2\right)\mathrm{\alpha }+{\mathrm{<figure-callout\; id="1"\; label="V\; c"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">V</figure-callout>}}_{\mathrm{c}}$$
  
• for example support points 2 and 3, see Figure 3 . For Figure 3 the following legend applies:

  V

  = Oscillation speed

  t

  = Time

  T

  = Period time of an oscillation, oscillation period

  T ₁

  = Part of the oscillation curve against the direction of the casting speed

  T ₂

  = Part of the oscillation curve in the casting speed calculation

  1 / 2T

  = Half the period time

  A ₁

  = Area share (integrated path, upward movement)

  A ₂

  = Area share (integrated path, upward movement

  (1)

  = Base point (speed and time)

  V _G

  = Direction of casting speed

The start and end point (0 and 360 degrees) are set as a fixed required angle input. The value of the oscillation speeds for all set angular points is to be entered in a practice-related manner, for example in mm / s. The operator can create a relative reference here and thus easily create his idea of the character or the profile of the oscillation curve to be created.

The individual support points are automatically connected to one another after they have been entered in the oscillation device. The resulting entire curve (polygon) of a speed profile thus consists of a closed composition of linear sub-functions. Of course, in addition to linear interpolation, any other type of interpolation between the support points is also covered by the present invention.

This said interpolation of the interpolation points and thus also step 2 can be dispensed with if the speed profile is specified immediately in the form of a continuous speed profile.

The specified speed profile or the speed profile determined by interpolation according to method step 2 does not have to be sinusoidal, but can also be that in Figure 4 only assume the courses shown as examples. So the left figure in Figure 4 For example, an oscillation curve with 2 0 crossings within one oscillation period. The right figure in Figure 4 shows, however, an oscillation curve with a plurality of here, for example three, minima per period.

entspricht $$\mathrm{f}\left(\mathrm{a}\right)=\left({\mathrm{v}}_3-{\mathrm{v}}_2\right)/\left({\mathrm{a}}_3-{\mathrm{a}}_2\right)\mathrm{a}+{\mathrm{V}}_{\mathrm{c}1}$$

The left figure in Figure 5 once again illustrates the linear interpolation between two specified interpolation points carried out in method step 2. The curve between two support points corresponds to a linear normal function. For Figure 5 , left figure applies: $$\mathrm{f}\left(\mathrm{x}\right)=\mathrm{mx}+\mathrm{n}$$

corresponds $$\mathrm{f}\left(\mathrm{a}\right)=\left({\mathrm{v}}_3-{\mathrm{<figure-callout\; id="2"\; label="v"\; filenames="imgf0002.png,imgf0003.png"\; state="\{\{state\}\}">v</figure-callout>}}_2\right)/\left({\mathrm{a}}_3-{\mathrm{a}}_2\right)\mathrm{a}+{\mathrm{<figure-callout\; id="1"\; label="V\; c"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">V</figure-callout>}}_{\mathrm{c}}$$

T_n

= Negativ Strip Zeit

T

= gesamte Periodenzeit

V

= Oszillationsgeschwindigkeit

t

= Oszillationszeit

V_G

= Gießgeschwindigkeit

f

= Oszillationsfrequenz

The right figure in Figure 5 illustrates an example of a predetermined speed profile resulting from the interpolation over time, where - at Plotting the casting speed V _G in the negative direction, it can be seen that this speed profile has a speed value during a time interval T _n which is greater than the casting speed. This time range or this time interval T _n represents the so-called "negative strip" time, as it is described with its advantages in the introductory part of the description. For those in the right figure of Figure 5 The generated oscillation curve shown with representation of the negative strip area applies the following legend: $${\mathrm{T}}_{\mathrm{n}}\left(\%\right)={\mathrm{T}}_{\mathrm{n}}/\mathrm{T}$$

T _n

= Negative strip time

T

= total period time

V

= Oscillation speed

t

= Oscillation time

V _G

= Casting speed

f

= Oscillation frequency

Step 3:

According to Figure 2a This method step 3 provides that first the contents of the partial areas A1, A2 above and below the x-axis are calculated, which are enclosed or enveloped by the speed profile calculated in method step 2. This is done with a calculation device 130 according to the invention inside or outside the oscillation device 100. The positive (above the x-axis) and negative (below the x-axis) lying partial areas A1, A2 are determined in this way compared with each other in terms of their area. An automatic check within the calculation device generates a corresponding correction if the surfaces are not identical or offers the operator of the oscillation device an option for correction.

Step 4:

So that the desired curve profile or the character of the entered curve is retained, a parallel shift of the specified speed profile along the ordinate is carried out to adjust the surface area of the partial areas until the area of the partial areas above and below the abscissa are the same; see process step 4 in Figure 2b . This adjustment of the surface areas of the partial areas in the speed profile is necessary in the present invention so that when the speed profile is converted into the stroke profile for the oscillation device, the same amplitudes can be set when oscillating in and against the casting direction. If the positive and negative amplitude during the oscillation were not the same, this would have the disadvantage that the mold would be successively displaced in height by the oscillation, which is not wanted.

Process step 5:

The previously determined speed profile with the sub-areas of equal size above and below the x-axis per period is integrated into a stroke profile for the oscillation according to method step 5. The integration can be, for example, a numerical integration. In this way, the stroke progression can be calculated over an angle or over time as an oscillation period.

Process step 6:

After the integration of the speed profile, the stroke profile is normalized, in particular to a desired maximum stroke amplitude, e.g. B. in the amount of +/- 2mm and / or a desired stroke frequency.

The stroke profile determined in this way can be entered into the oscillation device before the start of or during an oscillation in the ongoing casting operation and implemented by the oscillation device. If desired, the previous stroke can also be switched to a new stroke while the oscillation is running.

List of reference symbols

100

Oscillating device

110

Adjusting element

120

Control device

130

Calculation device

140

Input device

142

Display device

200

Continuous caster

210

Oscillation device with mold

220

Strand guide

300

Cast strand

R.

Pouring direction

S.

Control signal

V _G

Casting speed

Claims (14)

1. Method of operating an oscillation device (100) for a continuous casting mould (210) for producing a cast strip (300), preferably of metal, comprising the following steps:

   oscillating the continuous casting mould (210) with a stroke plot over at least one period, characterised in that the stroke plot is determined as follows:

   - predetermining a desired periodic speed plot for the oscillation over the period;

   - calculating the surface areas of the positive and negative part areas, which are included by the speed plot and the x axis within the period, above and below the x axis;

   - checking whether the surface areas of the positive and negative part areas are of the same size; and

   - if yes:

   determining the stroke plot for the continuous casting mould by integration of the speed plot with the same-size part areas above and below the x axis over the period.
2. Method according to claim 1, characterised in that if when the check is carried out a difference between the size of the positive and the negative part areas per period is ascertained then before determining the stroke plot the following intermediate step is performed:

   - displacing the predetermined speed plot so that a displaced speed plot arises in which the positive and negative part areas, which are included by the displaced speed plot and the x axis within the period, above and below the x axis are respectively of the same size,
   and that when determination of the stroke plot is carried out the displaced speed plot is used as the speed plot with the part areas of the same size.
3. Method according to one of the preceding claims, characterised in that the speed plot is predetermined in the form of a continuous curve plot or in the form of at least three support points over the period.
4. Method according to claim 3, characterised in that the support points are interpolated with respect to the speed plot.
5. Method according to any one of the preceding claims, characterised in that the stroke plot determined by integration is normalised to a maximum desired amplitude of oscillation.
6. Method according to any one of the preceding claims, characterised in that the speed plot for the oscillation is predetermined in such a way that the speed in casting direction is greater than the casting speed during a time period.
7. Method according to any one of the preceding claims, characterised in that the predetermined speed plot for the oscillation has a plurality of zero transitions, at least one local maximum and/or at least one local minimum.
8. Computer program produce which can be downloaded directly into the memory of a computer and has software code segments by which the steps according to any one of the preceding method claims can be performed when the computer program product is run on a computer.
9. Oscillation device (100) for a continuous casting mould (21) for producing a cast strip (300), with
   at least one adjusting element (110) for oscillating the continuous casting mould (210); and a control device (120) for controlling the adjusting element (110) by a setting signal (S) which represents a stroke plot for the oscillation over a period;
   characterised in that
   the control device (120) is constructed to operate the oscillation device (100) in accordance with the method according to any one of the preceding claims 1 to 7.
10. Oscillation device according to claim 9, characterised by a computing device (130) constructed to determine the stroke plot as follows:

    - computing the surface areas of the positive and negative part areas, which are included by the speed plot and the x axis within the period, above and below the x axis;

    - checking whether the surface areas of the positive and negative part areas are the same size; and

    - if yes: determining the stroke plot for the continuous casting mould by integrating the speed plot with the same-size part areas above and below the x axis over the period; and wherein the computing device (130) is further constructed to communicate the determined stroke plot to the control device.
11. Oscillation device according to claim 10, characterised in that the computing device (130) is further constructed to perform, before determination of the stroke plot, the following intermediate step if when the check is carried out a difference of the positive part surface areas from the negative part surface areas is ascertained:

    - displacing the predetermined speed plot for the oscillation over the period so that a displaced speed plot arises in which the positive and negative part areas, which are included by the displaced speed plot and the x axis within the period, above and below the x axis are respectively of the same size; and

    - determining the stroke plot for the continuous casting mould (210) by integrating the displaced speed plot as the speed plot with the same-size part areas over the period.
12. Oscillation device according to any one of claims 9 to 11, characterised in that the computing device (130) is constructed to interpolate the predetermined speed plot if this is predetermined only in the form of at least three support points over the period.
13. Oscillation device according to any one of claims 10 to 12, characterised by an input device (140) for the predetermination or input of the desired speed plot in the form of at least three support points per period.
14. Oscillation device according to claim 11, characterised in that a display device (142) for graphical representation of the predetermined speed plot, the displaced speed plot and/or the computed stroke plot at least during a period is associated with the input device (140).

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