[1]The present invention relates to a solidification apparatus for preparing a steel plate by continuously solidifying the molten metal.
BACKGROUND
[2]In general apparatus for continuously solidifying the molten metal as is composed of a plurality of heat rollers disposed one after another in a mold and a molten metal penetration, the discharge side of the mold. Usually a plurality of heat rollers are provided in segments.
[3]
On the other hand, the molten metal surface is solidified in the mold, the internal status solidification is not in progress, that is to get out into a half solidified state and gradually progress of solidification to the inside as it passes between the roller and heat is off the apparatus after being completely solidified.
[4]
At this time, the molten metal solidifies, and when it passes through the metal plate to be formed is heat roller, since for some time and the reaction conditions inside the metal plate a metal in a molten state remains. Therefore, the metal plate inside the mold is considerable pressure due to the height difference between the bath surface and for my work, the rollers and the roller bearing and the roller support structure are designed to withstand the load.
[5]
In addition, the more the roller is located under a conventional metal plate, so is the pressure due to the height difference between the bath surface for increased as proceeding down the larger diameter. Also, the higher the pitch of the rollers (roller pitch) distance between the centers of the two rollers has a diameter larger neighboring in the traveling direction of the metal plate.
[6]
On the other hand, a roller in contact with the metal sheet surface is become the metal plate is, and to suppress the rise phenomenon bulging outwards due to the internal melt pressure, wherein the larger the roller pitch of the metal plate and the section rollers are not in contact spreads between the roller and the roller plate surface the climb is somewhat bloated.
[7]
That is, referring to Figure 1, the metal plate is in the process of passing between the rollers, the partial rollers are out of reach rises swollen layer solidifies little by little due to the pressure.
[8]
Therefore, if possible, in order to prevent the solidification swelling layer is preferably arranged closely to the roller minimizes the roller pitch.
[9]
On the other hand, and solidified layer can have occurred, positive climb the solidification layer of the swollen swelling phenomenon is periodically increased or decreased, there is estimated to cause the bath surface height variation for because of this phenomenon. Furthermore, this phenomenon is that the reaction causes a change in volume of the inner metal plate, it proceeds through the rollers in this state causes a periodic variation in height of the bath surface in the mold for.
[10]
Period of the bath surface height variation of this is for, the observed point is that closely related to the roller pitch. In this way, the height variation of the bath surface is higher for a metal sheet running speed, and the larger the roller pitch bath surface height variations tend to be empirically known to increase, but for the accurate mutual mechanism (Mechanism) is not known.
[11]
On the other hand, if it exceeds the variation tolerance level height of the bath surface for, as well as adversely affect the quality by a non-uniform coagulation occurs, in severe cases non-vulnerable portion of the solidified layer to tear As solidified molten metal is leaking out of production stops and can give serious damage such as that production equipment is damaged.
[12]
Therefore, many and this operation is done by limiting the rate of progression of the metal plate within the tolerance level of the bath surface height variation for the case, so that there is a factor of lowering the productivity of the metal plate.
Detailed Description of the Invention
SUMMARY
[13]
One embodiment of the invention, and ever changing the arrangement of the rollers in order to reduce the cyclic variation of the bath surface in addition to avoid the repetition of the roller pitch, and thus the height variation in the bath surface for according relatively insensitive to the traveling speed of metal sheet for and an object thereof is to provide a coagulation device significantly increase the traveling speed of metal sheet and further improve the productivity of the metal plate.
Problem solving means
[14]
Coagulation apparatus according to an aspect of the invention is a solidifying device for producing a solidified metal sheet from molten metal, comprising a roller column are arranged along the traveling direction of the metal sheet, when separated the roller open into a plurality of sections, in which a section average of a roller pitch distance between the centers of two adjacent rollers in the traveling direction of the metal plate is smaller than the roller pitch average of the leading edge.
[15]
Also, the average pitch of the rollers in the one section can be smaller than the average pitch of the rollers in the trailing section.
[16]
Here, the cycle of the number of the roller pitch can be at least four areas.
[17]
Furthermore, the interval may be a space defined by a roller that is disposed at 1m or more in length.
[18]
Furthermore, the interval may be a space that is physically separate compartment.
[19]
Preferably, the physical segment can be a segment unit.
[20]
Furthermore, the interval may be a space between the drive roll and then driving roll.
[21]
Further, the difference between the average of the roller pitch on the average and the leading edge of the roller pitch in any of the interval may be at least 10mm.
[22]
Preferably the difference between the average pitch roller may be more than 20mm.
[23]
Further, the moving speed of the metal plate may be at least 4m / min.
[24]
In addition, the section comprises a horizontal section and a curved section which is arranged to be curved at a predetermined curvature between the outlet and the horizontal section of the mold to which the molten metal discharged transferring the metal sheet horizontally, the outlet and the curved It provided on at least one of the interval, or the curved section and the horizontal section, and may include an inflection sections disposed at different curvature.
[25]
In addition, the vertically connected to the outlet for conveying the metal sheet in the vertical and may further include a vertical segment connected to the curved section.
[26]
In addition, the average of the roller pitch of the section can be defined by the following equation (1).
[27]
Equation 1:
[28]
Here, N is the number of the roller pitch defined on the interval, k is the interval number, i is a serial number of the roller pitch that appears in the k section.
[29]
Also, present in the average length of the roller pitch that interval is the metal plate is smaller than the average pitch of the rollers on the leading edge coagulation, and coagulation to the length of the metal plate may be defined by equation (2).
[30]
Equation (2):
[31]
Where, L: 20 to 30 solidification constant (mm / min of: coagulation complete length (mm), V of the metal plate per minute progress rate (mm / min), H of the metal plate: plate thickness, K of half a).
[32]
In addition, the interval average of the roller pitch is smaller than the roller pitch average of the leading edge may be present more than once.
Effects of the Invention
[33]
According to one embodiment of the invention, it can be made insensitive to the effect of traveling speed of the metal sheet for the height variations of the bath surface within a mold for, and thus can significantly increase the traveling speed of metal sheet.
Brief Description of the Drawings
[34]
1 is a conceptual diagram briefly showing the progress of the plate.
[35]
Figure 2 is a schematic diagram of a coagulation apparatus according to an embodiment of the present invention.
[36]
(A) to (c) of Fig. 3 is a simplified showing the heat roller of the coagulation apparatus according to an embodiment of the present invention.
[37]
Figure 4 is a graph showing the average of the average in the conventional piecewise roller pitch of the piecewise roller pitch of the coagulation apparatus according to the embodiment of the embodiment.
[38]
5 is a graph showing the relationship of the length and speed solidification, the thickness of the metal sheet in one embodiment of the present invention.
[39]
Figure 6 is showing the average of each section of the solidified pitch roller device according to the present embodiment, one embodiment the graph.
Best Mode for Carrying Out the Invention
[40]
With reference to the accompanying drawings, an embodiment of the present invention will be described in detail. Embodiment of the present invention can be modified in various other forms of, but is not limited to the embodiment that is described below scope of the invention. The shape and size of the elements in the drawings may be exaggerated for more clear explanation, elements represented by the same reference numerals on the drawings, the same element.
[41]
[42]
2 is a schematic diagram of a coagulation apparatus according to an embodiment of the present invention, Figure 3 is a schematic diagram showing the heat roller of the coagulation apparatus according to an embodiment of the present invention.
[43]
If also to FIG. 2 and 3, the solidification apparatus 10 in this embodiment is a mold (20) for discharging into the tundish (1) of molten metal by cooling the (Y) of the initial solidified metal sheet (B) fed from the It can be included.
[44]
Here, the mold 20 is provided with a cooling means therein, whereby a according to the molten metal in contact with the mold 20 is cooled from the surface starts and is discharged to the metal plate (B) form, solidification of a metal plate (B) surface the internal may be discharged into the non-solidified state.
[45]
In addition, it may include a roller column are arranged along the traveling direction of the metal sheet to guide the movement of the metal plate (B) to be discharged to the discharge side of half-solidified state in the mold 20, these rollers column in connection with the driving unit It may constitute a transfer part (30).
[46]
Transfer part 30 and the reaction sikimyeo solidified by cooling the metal plate (B) of the state transfers to the next step.
[47]
In this embodiment transfer part 30 can be divided into a plurality of sections in accordance with the heat roller roller average pitch.
[48]
Here, referring to (a) of Figure 3, the cycle of the number of the roller pitch can be at least four areas. That is, the cycle of may be a space that includes 5 rollers, the center-to-center distance of roller pitch of these rollers can be defined as a space having at least four. In this embodiment the roller pitch is an important factor causing a variation in height of the bath surface for the interval is preferably defined for the roller pitch than the definition of the number of rollers.
[49]
Further, the average value of each interval pitch of the rollers can be represented by Equation 1 below.
[50]
[Formula 1]

[51]
Here, N is the number of the roller pitch defined on the interval, k is the interval number, i is a serial number of the roller pitch that appears in the k section.
[52]
[53]
On the other hand, in this embodiment, each section is not necessarily arranged in the roller arrangement are the same in the interval, at least four rollers, but is defined as a space having a pitch, which is opposite the mirror in each interval, the need to define the same interval, There, it is preferred that this definition in each individual section.
[54]
In addition, each segment in this embodiment may be defined by the interval in accordance with the length in addition to at least a space defined by having four roller pitch, but the definition of the interval is not limited.
[55]
That is, the period in this embodiment may be a space defined by a roller that is disposed at 1m or more in length.
[56]
If each section is less than 1m in the present embodiment, the height variation of the bath surface for the roller to a fairly dense arrangement does not appear easily. On the other hand, in this embodiment, intervals may be defined as a space defined by a roller disposed at a sufficient length in the range in which the equipment conditions allow.
[57]
Meanwhile, the interval can be defined as a space that is physically divided into.
[58]
In one example, the physical space that is partitioned into, may be a space which is partitioned in segments, as shown in Figure 3 (b). Segment may be provided with a plurality of rollers for guiding the movement of the metal plate, heat roller is to be exchanged by the segment, replacement and the like can be physically partitioned into.
[59]
Also, refer to (c) of Figure 3, the physical space that is divided by, in addition to the segment may be a space between the drive roll and then driving roll.
[60]
Typically segments may be provided with a single drive roll, for example can be provided with a driving roll in a central portion of the segment. In addition, the segment may comprise a plurality of heat roller in addition to the driving roll. Here, the space between the drive roll and then driving roll space between is, may be a space between the drive rolls of the trailing and the drive rolls of a preceding segment, a segment, a segment unit in addition to the driving roll of the structure to be provided in various forms, a partitioned space, a space has a plurality of heat rollers can be placed.
[61]
In this way, the roller yeol divided into a plurality of intervals is the average of the roller pitch distance between the centers of two neighboring sections of the normal to the direction of movement of the metal roller can be equal to or greater than the average pitch of the rollers at the leading edge.
[62]
This is because the metal sheet (B) The increase in the load by the height difference between the bath surface / metal plate (B) for the roller toward the trailing heat progress interval, thereby to increase the pressure acting heat roller.
[63]
On the other hand, in any one period among the plurality of sectors in the present embodiment, the average of the roller pitch is the distance between the centers of the two rollers adjacent in the traveling direction of the metal plate be smaller than the roller pitch average of the leading edge. This roller heat plurality when the hayeoteul divided into sections, it is possible to have center-to-center distance of roller pitch average of the two adjacent roller in the traveling direction of the metal plate is smaller than the roller pitch on the average, leading edge at any one interval.
[64]
Preferably, in any one interval when the average of the center roller pitch is the distance between two neighboring in the traveling direction of the metal plate roller is smaller than the roller pitch average of the leading edge, it may be less than the average of the roller pitch in the trailing section .
[65]
That is, the average pitch of the rollers at any one cycle of the interval is smaller than the average reversal of the roller pitch of the leading edge and the trailing segment may be present.
[66]
Preferably, each piecewise roller pitch average may appear as shown in the graph shown in Fig. Figure 4 is a graph showing the average of the average in the conventional piecewise roller pitch of the piecewise roller pitch of the coagulation apparatus according to the embodiment of the embodiment. Here, the x axis represents the duration, the y-axis indicates the average of the roller pitch.
[67]
Referring to FIG. 4, on the basis of a section in the present embodiment, the average pitch of the rollers on the average pitch of the rollers and, the leading edge difference can be obtained a significant result to increase, when the peripheral velocity greater than 10mm.
[68]
That is, when the roller pitch average of one interval to be reduced to less than 10mm than the roller pitch average of the leading edge and does not affect the height variation of the bath surface in the mold for.
[69]
On the other hand, when the roller pitch average of one interval to be reduced to 10mm or more than the average pitch of the roller, leading edge, it is possible to alleviate the variation in height within the bath surface for a formwork.
[70]
For example, on the basis of a section, if the average of the roller pitch reduction of about 17mm than the roller pitch on the average of the leading edge, the mold of the prior art compared to the peripheral velocity of the height variation within the bath surface for a relaxed according to 0.5m / min approximately It can be improved. That is, in the case of the prior art, the main hollow yieotdamyeon 6.5m / min, it can be seen that after the reducing roller pitch average applied in the art, also the main hollow increased to 7.0m / min.
[71]
Preferably it can be a roller pitch average of the intervals, and more significantly improve the degree to ease the height variation in the bath surface within the mold for the case be reduced more than 20mm for the roller pitch average of the leading edge.
[72]
For example, on the basis of the interval, the average pitch of the rollers in that case be compared to the average pitch of the rollers on the leading edge decreases from about 38mm, compared to the prior art peripheral speed of the height variation within the bath surface for a formwork according to relaxed 1.5m / min approximately It can be improved. That is, in the case of the prior art, the main stomach to increase 6.5m / min, if the decline of the roller pitch average of about 1.7mm yieotdamyeon main hollow 7.0m / min, if the reduction of about 38mm than the roller pitch average primary genus 8.0m / min it can be seen that.
[73]
Therefore, it is preferable to refer to the data, that the roller pitch average more than 20mm for the roller pitch average of the leading edge can be seen that to obtain the most desirable results.
[74]
However, the degree of reducing the average pitch roller can be the upper limit value determined according to the load capacity of the equipment. Usually the case to increase the degree of reduction of the roller pitch on average, may be a large load imparted to the support structure and the driving system such as a bearing that supports the roller, and thus the roller pitch reduction of the average is the decline in accordance with the load in such a plant to endure an upper limit this information can be made.
[75]
Thus, the average pitch of rolpeo in any one section may be smaller than the average pitch of the rollers on the leading edge, so that it can be seen that it is possible to alleviate the variation in height within the bath surface for a formwork. In addition, the average of rolpeo pitch in any one period is smaller than the roller pitch since the average of the leading edge, the average of the roller pitch in the trailing portion may be increased again.
[76]
5 is a diagram showing the relationship between the solidification rate and the length, thickness of the metal plate in one embodiment of the present invention.
[77]
Referring to FIG. 5, the length required for coagulation to the metal plate (B) is complete in this embodiment can be shortened by increasing the moving speed of the metal sheet (B).
[78]
In this way it is possible reason for increasing the moving speed of the metal sheet (B), the roller pitch on the average traveling speed of the height variation due to the interval becomes smaller than the preceding period bath surface for the former to solidify the metal plate (B) is completely metal plate because it occurs relatively insensitive to.
[79]
Thus, the section is the roller pitch average becomes smaller than the preceding period is a metal plate and (b) may be present within the road prior to completely solidified, so that the metal plate (B) the height of the bath surface for All mold to solidify to the full difference the pressure caused by the decrease can be suppressed swelling phenomenon to the outside due to the pressure inside the molten metal in the course of the metal plate (B) is moved.
[80]
Thus, for this embodiment the maximum length of a period is a roller pitch mean that this inversion period is smaller than the leading edge is formed is equal to the length required for solidification the metal plate (B), this length is the moving speed of the metal sheet (B) (V ) to be defined by equation (2) to a function.
[81]
[Formula 2]

[82]
Where, L: 20 to 30 solidification constant (mm / min of: coagulation complete length (mm), V of the metal plate per minute progress rate (mm / min), H of the metal plate: plate thickness, K of half a).
[83]
[84]
Preferably, in this embodiment the solidification apparatus bath surface For mold as in any one section is the average of the roller pitch is the distance between the centers of the two rollers adjacent in the traveling direction of the metal plate smaller array than the roller pitch average of the leading edge It can relieve variations in height, so that the moving speed of the metal plate can be maintained with more than 4m / min.
[85]
In addition, as illustrated in transferring 30 Figure 2 In this embodiment, the mold horizontal section 300 that is connected with the vertical section 100, a subsequent process is vertically linked to 20, the outlet of the vertical interval can be divided into the curved section 200 is arranged to be bent between 100 and horizontal section 300.
[86]
At this time, at least one of between the vertical section 100 and the curved section 200, curved section 200 and the horizontal section 300 may be provided with an inflection section 400 that is bent to a different inclination.
[87]
In addition, the transfer part (30) at least there is one segment can be provided, in the neighborhood in the traveling direction of the metal plate with an inflection section 400 is disposed between the vertical sections 100 and curved sections 200 in the vertical section (100) the average pitch of the two rollers the distance between the centers of the rollers can be arranged to be smaller than the average pitch of the preceding segment.
[88]
Thus, the average of the roller pitch distance between the centers of the two rollers adjacent in the traveling direction of the metal plate in a trailing period after the inversion interval is less disposed than the roller pitch average of the leading edge average rolpeo pitch may increase again, .
[89]
On the other hand, transfer part 30 in this embodiment, but are described as being separated by a vertical segment 100, a curved section 200, a horizontal segment 300, it is conveying part 30 is formed only by the vertical section (100) from, the curved section 200 without a vertical section (100) are directly connected to the outlet of the mold 20 it may be formed by a horizontal section (300). In addition, an inflection section 400 may be the tilt is bent which do not separate the inflection section 400 when maintained the slope of the curved section or section 200 that is variable schedule.
[90]
Preferably, this period is an average of the roller pitch is smaller than the roller pitch average of the leading edge may be present more than once, so that the degree of relaxation of the height variation within the bath surface for the mold can be further increased.
[91]
Mold 20, height variation of the developer within the bath surface is intensified for greater the rate of progression of the metal plate (B), there is arranged to the roller pitch average of the roller constant, it can increase to intensify the more long repeat. Therefore, when minimizing the repeatability is the roller pitch average of the roller being and arranged monotonically increasing can be insensitive to height variations phenomena bath surface for from the effects of the traveling speed of metal sheet (B), this prior art a height variation of the bath surface for according and, keeping the same level as a result it is possible to increase the traveling speed of metal sheet (B).
[92]
[93]
Figure 6 is a graph showing the average of each section of the solidified pitch roller device according to the present embodiment, one embodiment the graph. Here, the x axis represents the duration, the y-axis indicates the average of the roller pitch.
[94]
Referring to Figure 6, even if the roller pitch average of which in this embodiment section is, the degree of decrease of the roller pitch average of the immediately preceding leading edge is slightly increased roller pitch average of less than 10mm, the trailing zone, of the trailing segment If the degree of reduction of the sum of the average and the roller pitch 10mm or more, it is possible to improve the degree of relaxation of the height variation within the bath surface for a formwork.
[95]
That is, even in a predetermined period, each of the roller pitch average is not sufficiently reduced by more than 10mm, if a trend that the sum of the roller pitch average within successive whole section is reduced by at least 10mm, easing the height variation in the bath surface for in mold you can get a meaningful result.
[96]
Specifically, in the D1, and the reduction of the average width of the roller pitch 8mm between D2, D2 is then in the average pitch between the rollers D3 increased 4mm, in D3 this roller average pitch between D4 can be reduced 8mm.
[97]
At this time, the degree of reduction is less than 10mm in pitch roller average between each interval, can not be obtained significant results to alleviate the fluctuation of the bath surface height in the mold for only about roller average pitch reduction between each adjacent section.
[98]
On the other hand, in the sum of the reduction roller pitch D1 between the average D4 it may be 12mm, which is approximately a whole roller pitch average reduction in height can mitigate the variation in the bath surface For more than 10mm, the mold.
[99]
Thus, the roller pitch average may be increased again in the preceding interval (e.g., interval between D4 from D1) in the reduced since, again, the trailing zone (e.g., after the period D5).
[100]
[101]
The present invention is not limited by the above-described embodiment and the accompanying drawings, various may be made without departing from the scope of the invention set forth in the form of changes and modifications conventional in the art is that the available it will be apparent to those with knowledge.

WE Claims

[Claim 1]A coagulation device for producing a solidified metal sheet from the molten metal, the neighboring time comprises a roller column are arranged along the traveling direction of the metal plate and hayeoteul distinguish the roller open into a plurality of sections, in any one period in the direction of movement of the metal sheet small solidification apparatus, the average of the two rollers of the pitch distance between the center of the roller than an average pitch of the preceding segment.
[Claim 2]
The method of claim 1, wherein the solidified small devices than the average pitch of the rollers at the average pitch of the rollers in the one section trailing section.
[Claim 3]
The method of claim 1, wherein the interval is the coagulation apparatus, the number of the roller pitch at least four areas.
[Claim 4]
The method of claim 1, wherein the interval is a space defined by the solidification apparatus includes a roller disposed at 1m or more in length.
[Claim 5]
The method of claim 1, wherein the solidification section is a physical device that is divided into compartments.
[Claim 6]
The method of claim 5, wherein the physical blocks are the coagulation apparatus segments.
[Claim 7]
The method of claim 1, wherein the interval is a space between the coagulation apparatus the driving rolls and then driving roll.
[Claim 8]
Any one of claims 1 to A method according to any one of claim 7, wherein the difference between the average of the roller pitch on the average and the leading edge of the roller pitch in any of the intervals is less than 10mm coagulation device.
[Claim 9]
10. The method of claim 8 wherein the difference in the roller pitch is an average clotting device at least 20mm.
[Claim 10]
The method of claim 8, wherein the moving speed of the metal sheet is 4 m / min or more coagulation device.
[Claim 11]
The method of claim 8, wherein the section includes a curved section which is arranged to be curved at a predetermined curvature between the horizontal plane for transferring the metal plate horizontally, the outlet and the horizontal section at which the molten metal outlet, and the outlet coagulation apparatus for providing to at least one of between the curved section or the bent section and the horizontal section, and including an inflection sections disposed at different curvature.
[Claim 12]
12. The method of claim 11, is vertically coupled to the outlet for conveying the metal sheet in the vertical and coagulation further comprising a vertical section which is connected to the curved section.
[Claim 13]
Any one of claims 1 to A method according to any one of claims 7 or 8, to the average of the roller pitch of the interval coagulation apparatus as defined by equation (1) Equation (1): wherein, N is the number of the roller pitch defined in the interval and, k is the interval number, i is a serial number of the roller pitch that appears in the k section.
[Claim 14]
Any one of claims 1 to 7. A method according to any one of claims, wherein the section is the average of the roller pitch is smaller than the roller pitch average of the leading edge is present in the length to which the metal sheet coagulation, to have solidified length of the metal plate mathematics . solidification apparatus equation defined by the formula 22: wherein, L: coagulation complete length (mm), V of the metal plate per minute progress rate of the metal plate (mm / min), H: thickness of the metal plate, K: 20 to 30 the coagulation constant (mm / min 1/2 ).
[Claim 15]
The method according to any one of claims 1 to 7, wherein the coagulation apparatus, the average of the interval is smaller than the roller pitch roller pitch average of the preceding section is present more than once.