1]The present invention relates to an invention for preventing the problem that the main shift backward in the process of performing, and more particularly relates to a rolling performance played rolling method and a rolling device performance.
BACKGROUND
[2]Using the high-temperature cast solidified in the step of performing a rolling caster has the equipment cost and the operation cost is used because the low cost compared to conventional processes, widely present.
[3]
In addition, this while using a continuous casting and rolling continuously, the continuous casting and there is also a discontinuous process can be performed which may be carried out separately from the rolling, which is described in detail in Korea Patent Publication No. 1990-7001437.
[4]
That is, in the mode of discontinuous rolling to conduct continuous rolling and the continuous casting step and the rolling step for performing a continuous casting process and the rolling process is continuously discontinuously is to be performed, respectively.
[5]
Here, Figure 1 is a rolling mill (20 'to produce the cast steel (second slab (2') having a predetermined thickness in 'that illustrates a caster (10 ... (1), which can perform continuous rolling)) 'is rolled in), an additional heater (40' may be rolled by heating the slab (2 ') in). Thus rolling the finished slab (2 ') is a cutter (30' are wound by a cutting is wound by a) is produced as a product.
[6]
However, where the case, the front end of said rolling mill (20 slab (2), which is continuous and "slab (2 discharged from) the caster 10, which is pressed down is chiip a), the slab (2 '), a front end portion since chiip is rolling without tension, there is a problem in that the translational force occurs after a caster (10 ") direction.
[7]
Accordingly, the caster 10 'and affect the level of the molten steel bath surface within, had an effect on the whole plant, making it difficult to secure the quality of the product produced.
[8]
Therefore, it became necessary to study on how to play and play rolled rolling apparatus for solving the above problems.
Detailed Description of the Invention
SUMMARY
[9]
An object of the present invention to add the cast shear produced in the caster provides performance rolling method and rolling equipment performance to prevent the problem that the state shift to the reverse value entrance to the rolling mill.
Problem solving means
[10]
Playing rolling method according to one embodiment of the present invention, the front end of the first rolling stand, adding the cast front end provided with a continuum in a cast steel produced by the continuous casting step and a continuous casting step in producing a cast steel which enters the first time, convenience, the state after additional passage may include a rolling step of rolling the cast steel.
[11]
Furthermore, the rolling step of the play the rolling method according to an embodiment of the present invention, wherein after the first rolling stand, wherein the cast front end portion through the plurality of rolling stands group of rolling mills including the, to the reduction of the cast steel It can be characterized.
[12]
Furthermore, the rolling step of the play the rolling method according to an embodiment of the present invention, a chiip passing into the first rolling stand, the main front end biased open, the cast front end portion passed through the first rolling stand, after the pair of rolling rollers are supported stage and entering the second rolling stand of having the cast front end portion of the first rolling stand, and then the adhesion to the slab is provided in the first rolling stand and the second rolling stand, a may include a rolling step for pressing the slab.
[13]
Furthermore, the rolling step of the play the rolling method according to an embodiment of the present invention, chiip step, the cast front end portion provided in the first rolling stand, and then to pass into the first rolling stand, the open parts of the cast shear a pair of supplied first to entering a second rolling stand, if the second part of the cast that the reduction step and the pressure for pressing the slab in the rolling stand is the reverse to the first rolling stand, the first rolling stand, the rolling roller is moved upward or downward, or may include a buffer comprising: pairs of pinch rolls provided on the inlet of the first rolling stand moving upward or downward.
[14]
Furthermore, the rolling step of the play the rolling method according to an embodiment of the present invention, the first interval rolling rolls each provided with a plurality of rolling stands including a rolling stand pair, with increasing progressively advances the cast direction reducing can be characterized by rolling said cast steel in order.
[15]
In addition, the performance rolling apparatus according to another embodiment of the present invention includes a first rolling stand, which is located in the caster and the caster outlet to produce a cast steel, the additional cast shear provided by the continuum approach first the slab is produced from the caster It comprises a rolling mill having a plurality of rolling stands including the rolling mill, it is possible to cast the front end portion to be characterized in that it comprises rolling the cast steel after passing through the first rolling stand.
[16]
[17]
* In addition, the rolling mill of the play the rolling device according to another embodiment of the present invention, the first is provided on the exit side of the rolling stand, the support point determination sensor and provided in the following the first rolling stand to sense the cast front end a second is provided in the inlet of the rolling stand, it may be provided with a push-down point determined sensor for sensing the cast front end.
Effects of the Invention
[18]
Playing rolling method and a rolling apparatus of the present invention can play a front end portion when the cast-rolling, the effect capable of preventing the main shift backward.
[19]
Accordingly, to stabilize the molten steel bath surface level of the continuous caster and is the advantage of preventing occurrence affecting other devices.
[20]
Therefore, it is possible to ensure the continuity of the process for the continuous casting and rolling, it is possible to improve the quality of the rolled product to be produced.
Brief Description of the Drawings
[21]
1 is a view showing a conventional rolling device performance.
[22]
2 is a side view showing a play-rolling apparatus according to the present invention;
[23]
Figure 3 is a side view showing one embodiment of a case that is added to the mills in the slab front end chiip playing rolling apparatus of the present invention.
[24]
4 is a side view showing yet an embodiment of the front end portion when the slab in a rolling mill to chiip playing rolling apparatus of the present invention.
[25]
5 is a flow chart showing the play the rolling method of the present invention.
[26]
Figure 6 is a flow diagram illustrating one embodiment of a rolling step in playing rolling method of the present invention.
[27]
7 is a flow diagram illustrating yet another embodiment of the rolling step in the performance of the present rolling method invention.
Mode for the Invention
[28]
Hereinafter, with reference to the drawings will be described in a specific embodiment of the present invention in detail. However, the spirit of the invention nor be limited to the embodiments set forth for example, by the person skilled in the art to understand the scope of the invention is added to the other components within the scope of the same idea, change, deletion, etc., deterioration of the other invention or the invention would be able to readily suggest a further embodiment within the scope of the idea, this will also be included in the inventive idea scope herein.
[29]
In addition, the same components, functions in the scope of the same idea appears in each embodiment will be explained with reference to the figures the same reference numerals.
[30]
[31]
Playing rolling method and rolling playing device 1 of the present invention is the process for performing play-rolled according to the invention to prevent the problem that the slab (2) backward.
[32]
That is, the play the rolling method of the present invention and play the rolling device (1) when the front end portion (2a) of the slab (2) rolling, to reduce or prevent the cast steel 2 is backward, caster 10 stabilize the molten steel bath surface level, and by preventing the influence on other devices, it is possible to ensure the continuity of the process for the continuous casting and rolling, it is possible to improve the quality of the rolled product to be produced.
[33]
[34]
Specifically, Figure 2 shows as a side view showing the play-rolling device (1) of the present invention, with reference them, play rolling apparatus 1 according to another embodiment of the present invention includes a caster in producing cast steel (2) (10 ), and the caster 10 is located on the exit side, the caster 10, the first rolling stand 21 has a front end portion (2a) of the product (2) provided in the continuum in the cast steel 2, which is entered first is produced in a comprises a rolling mill 20 having a plurality of rolling stands including the rolling mill 20, the cast slab after the front end portion (2a) of said slab (2) is passed through the first rolling stand (21) to be provided to the rolling (2) it can be characterized.
[35]
In addition, the rolling mill 20 of the play the rolling apparatus 1 according to another embodiment of the present invention, is provided on the exit side of the first rolling stand 21, the front end portion (2a) of said slab (2) a second is provided in the inlet of the rolling stand 22, the push-down for sensing a front end portion (2a) of said slab (2) having a sensing support point determination sensor 23 and the first rolling stand 21, which then It may have a time judgment sensor 24.
[36]
That is, the present caster 10, the rolling mill 20, such as a structure to avoid the problem that the effort occurs after the time the reduction of the slab (2), a front end portion (2a) of the thickness of the slab (2) As thin one will.
[37]
[38]
The caster 10 can serve to produce a slab 2 from the molten steel through the casting process. That is, the caster 10 is to form a slab (2) and supplying the molten steel into the mold in the tundish, the supplied molten steel while deprived of heat, the slab (2) has a segment roll (Segment Roll) and pinch rolls and guide by (Pinch Roll) can be supplied to the rolling mill 20 to be described later is moved.
[39]
However, this caster 10, it is difficult to control the production rate due to the production of slab (2), depending on the solidification rate of the molten steel. Therefore, It is the reduction in the caster 10, the cast slab (2) rolling mill 20 to be described later receives continuously transferred to the product produced in the production is possible the speed of the constraint.
[40]
However, since the slab (2) discharged from the caster 10 is high, the average temperature, there is an advantage in that the temperature required for the work during rolling in a rolling mill (20) can be secured to some extent.
[41]
[42]
The rolling machine 20 can serve to produce a rolled steel plate to the reduction by receiving a slab (2) produced in the caster 10. For this purpose, the mill 20 is rolling roll pairs can be pressed down while passing through the slab (2), the rolling stand, a pair of these rolling roll is provided may be provided in plurality dog.
[43]
Here, the slab (2) produced in the caster 10 is received continuously provided to carry out the reduction in the rolling mill 20, the slab (2), a front end portion (2a) is in a state tension is not maintained in since chiip the first rolling stand, the first rolling stand (21), can generate a translational force and then directed to the continuous caster 10.
[44]
That is, when the slab (2) is pressed down, while reducing the thickness of the slab (2), there is be a length becomes longer, so the longer part is also provided longer in the traveling direction of said slab (2) However, the slab (2) by the provided longer in the traveling direction and the opposite direction, there is a said slab (2) the problems that may occur after the effort directed to the continuous caster 10.
[45]
In order to solve this problem, in the present invention, after the front end portion (2a) of said slab (2) is passed through the first rolling stand 21 is subjected to rolling for the slab (2), the slab (2) after the thus preventing the translational force.
[46]
In other words, this being the first slab (2) first passes through the rolling stand 21 has incorrectly pressed together to the other rolling stands, such as the second rolling stand 22 having the following the first rolling stand 21, the tension when the pressure of the front end portion (2a) of said slab (2), is not maintained since the part of the front end portion (2a) of said slab (2) the slab (2) is supported to being pushed back.
[47]
In other words, the front end (2a) part of a non-fixed free end of the slab (2) can be advanced in the slab (2), the traveling direction in order to accommodate the increased length part by the push-down, but by means of the rolling stand since part of the slab (2), a front end portion (2a) will pass on true that the fixing part by, not accommodating the increased length of the slab (2) supporting the slab (2) is pushed back.
[48]
[49]
In addition, the rolling mill 20 includes a support point determination sensor 23, by providing the like pressing down time determination sensor 24, the more the front end portion (2a) efficiency after prevent translational force generated at the time of pressing down of the upper limbs slab (2) It can be increased.
[50]
That is, the period of time is the first rolling stand (21) acts in addition to the slab (2), characterized in that the support point determining sensor 23 in order to provide to perform only serves to support in order to prevent the backward for pressing down while and push-down time will be determined to a sensor (24).
[51]
In other words, since the glass in order to improve it silsuyul performed in quick time so that pressure on the slab (2), a front end portion (2a) of said slab (2) to the second rolling stand 22 is chiip It is to be provided with the supporting point determination sensor 23 and a push-down point determined sensor 24 to be able to perform the push-down operation from the time.
[52]
The support point judgment sensor 23 is the first in a rolling stand (21) is provided on the exit side of the first rolling stand 21 on which the slab (2) is ejected, a front end portion (2a of the slab (2) ) is a sensor for sensing the time having passed through the first rolling stand (21).
[53]
Here, the supporting point determination sensor 23 that detects the front end portion (2a) of said slab (2), a pair of rolling rolls (21a) is the cast steel of which is provided to said first rolling stand (21) (2 ) is provided to be in close contact with it said slab (2) is prevented from being pushed back.
[54]
Then, upon detecting a front end portion (2a) of said slab (2) in the push-down point determination sensor 24, the reduction is carried out and performs a rolling operation.
[55]
The push-down point determination sensor 24 and the second to the rolling stand 22 is provided in the inlet of the second rolling stand (22) which enters the slab (2), a front end portion (2a of the slab (2) ) is a sensor for sensing the time of entry to the second rolling stand (22).
[56]
Here, when the push-down point determined sensor 24 detects the front end portion (2a) of said slab (2), the second rolling stand 22 is to perform a rolling operation in a reduction of the slab (2).
[57]
In particular, this time the cast steel generated during the rolling in the first rolling stand 21, because the close contact with the slab (2) so as to support the said slab (2) is pushed back, the second rolling stand (22) extended length portion (2) it is provided to advance without forcing back.
[58]
[59]
It can also play the rolling device (1) of the present application is further provided with a cutter, such as 30, the heater 40 to carry out the rolling process performance.
[60]
Wherein the heater (40) before the slab (2) is provided is produced from the caster 10 is provided in the rolling mill 20, the slab (2) the cast slab in the case where less than the temperature for the rolling (2 ) it is responsible for the heating.
[61]
The cutter 30 has the slab, if desired, in the middle part of the act of cutting the slab (2), or play the rolling device (1) in order to discharge the products of the slab (2) is push-down completion ( 2) it may be provided to cut.
[62]
[63]
Figure 5 is a cast steel produced by the continuous casting step and a continuous casting step to produce the play-rolling method slab (2) in accordance with one embodiment of the lower, refer to it as a flow diagram illustrating the playing rolling method of the present invention, the present invention ( 2) the first rolling stand 21 has a front end portion (2a) of the slab (2) that enters the first time provided a continuum, after the front end portion (2a) of said slab (2) pass through the slab (2) a may include a rolling step of rolling.
[64]
Furthermore, the rolling step of the play the rolling method according to an embodiment of the present invention, the front end of said slab (2) to the rolling mill 20, a plurality of rolling stands group including the first rolling stand (21) ( after having passed 2a), it may be characterized in that the reduction of the slab (2).
[65]
Furthermore, the rolling step of the play the rolling method according to an embodiment of the present invention, the direction in which the first rolling stand (21) rolling rolls each provided with a plurality of rolling stands pairs, containing the slab (2) with increasing gradually reduce the gap it can be characterized by rolling the slab (2) in sequence.
[66]
That is, in order to prevent the problem that a translational force generated at the time after the reduction of the slab (2), a front end portion (2a) of the thickness of the slab (2) As thin, it proposed a continuous casting step, rolling step.
[67]
[68]
The continuous casting step as a step of producing a slab (2) by said caster (10), receiving the molten steel by the continuous casting is to provide a slab (2). At this time, the front end portion (2a) of the product (2) is generated at the beginning of the continuous casting step is chiip a rolling mill (20) and performs a rolling step.
[69]
[70]
The rolling step is a step of producing products of the rolled steel plate to the reduction by receiving a slab (2) produced in the continuous casting step.
[71]
Here, initially to carry out the reduction on the cast steel 2, because the front end portion (2a) of said slab (2) is to be chiip while tension is not maintained in the first rolling stand, the first rolling stand, the caster after the problem of effort directed to the generation was described above.
[72]
The present invention is subjected to a reduction of the, in the rolling step the slab (2), a front end portion (2a) is after the slab (2) in passing through the first rolling stand (21) in order to achieve this, after the slab (2) was proposed in order to prevent translational force.
[73]
In other words, this being the first slab (2) first passes through the rolling stand 21 has incorrectly pressed together to the other rolling stands, such as the second rolling stand 22 having the following the first rolling stand 21, the tension are not maintained at the time of pressing down the front end portion (2a) of said slab (2), to the part after the front end portion (2a) of said slab (2) performing a rolling step, supporting that the slab (2) is pushed back that would be so.
[74]
This is true fore end (2a) part of a non-fixed free end of the slab (2) is provided a cast steel 2 so as to move in the advancing direction in order to accommodate the increased length part by rolling, and inherited by the rolling stand the slab (2) after part of the front end portion (2a) are intended to function as a fixing part to perform the rolling step so as to support an extended length of said slab (2).
[75]
[76]
In addition, the on the front end portion (2a) of said slab (2) after the front end portion (2a) of said slab (2) is discharged from the rolling mill 20, the case of performing the reduction of the slab (2) since in the embodiment the push-down only to the front end (2a) part of the later of the slab (2) without performing the voltage, the slab (2) the tension is maintained the reduction embodiment, the slab (2) by this reduction it is possible to prevent the problem being pushed back.
[77]
[78]
And may be carried out by a sequential rolling with respect to the front end portion (2a) of said slab (2), prevented at the time of reduction of the slab (2) that the translational force occurs after the slab (2).
[79]
That is, a plurality of rolling stands to be conjugated to the rolling mill 20 is subjected to rolling in sequence with respect to providing increasing gradually reduces in the direction of movement of the slab (2) a distance between the rolling roll pair, said slab (2) and, it will be prevented that the slab (2) backward.
[80]
[81]
Figure 3 is a side view showing one embodiment of a case where playing rolling device (1) slab 2 to the rolling mill 20 in the front end portion (2a) of the present invention is chiip, Figure 6 is a performance-rolling of the present invention how a flow chart illustrating one embodiment of a rolling step in.
[82]
Here, in FIG. 3 (a) depicts a state before the front end portion (2a) of the product (2) entering the rolling mill (20), (b) of Figure 3 is the front end (2a) of the product (2) the first will showing a state of chiip phase enters the rolling stand (21), (c) of Figure 3 slab (2) on the support stage and a front end portion (2a) has passed through the first rolling stand 21, the roll will have showing the embodiment, (d) of Figure 3 shows a rolling step in which the push-down front end portion (2a) of the product (2) is entering the second rolling stand (22).
[83]
3 and 6, the rolling step of the play the rolling method according to an embodiment of the present invention, passed to the first rolling stand (21) opens the front end portion (2a) of said slab (2) chiip step, a front end portion (2a) the rolling roll (21a) of the pair is provided to the first rolling stand (21) after having passed through the first rolling stand (21) of the slab (2) the slab to a front end portion (2a) of the support step and the slab (2) in close contact with (2) the entering the second rolling stand 22 is provided in the following the first rolling stand 21 and the second rolling stand ( 22) may include a rolling step for pressing the slab (2).
[84]
In other words, as in the one embodiment of the concrete steps of the rolling step, chiip step, the supporting step, rolling step, etc. it can be provided in sequence.
[85]
[86]
The chiip step is a step of in the open state of the first rolling stand (21) through the front end portion (2a) of said slab (2). That is, since the from the first rolling stand (21) can not be supported to When subjected to reduction with respect to a front end portion (2a) of said slab (2), and prevent said slab (2) backward, wherein 1 is to position and set larger than the thickness of the rolling roll (21a) pairs of the slab (2) having a distance to the rolling Stan.
[87]
[88]
Wherein the supporting step is a step of reduction in a later step prevents the translational force generated by the support after the slab (2) when pressing down on the slab (2).
[89]
That is, after the front end portion (2a) of said slab (2) is passed through the first rolling stand (21), the first rolling roll (21a) pairs of said slab (2) provided in the rolling stand (21) It is provided in close contact with, but the slab (2) is pushed back to be dropped out.
[90]
At this time, the rolling rolls (21a) pair is that the close contact with the slab (2), not the pressing force of the degree to which the pressure of the slab (2), the slab (2) towards the biasing force of the degree which can take the slab (2) is moved in the direction means is provided.
[91]
In other words, the first rolling roll (21a) the width of the pair provided on the rolling stand (21) is to be provided to the corresponding to the thickness of the slab (2).
[92]
[93]
The rolling step is rolled with a slab (2) in the rolling roll pair provided on the front end portion (2a) of said slab (2) is entering the second rolling stand 22, and the second rolling stand (22) and a step of performing a rolling operation.
[94]
At this time, the first pressing force, which second pair of rolling rolls of the rolling stand (22) pressure to the slab (2) will be larger than the power to the above-described the first rolling stand (21) is pressing the slab (2), wherein distance between the two pairs of rolling rolls of the rolling stand (22) is less than the distance between the pair of rolling rolls provided to said first rolling stand (21).
[95]
In this way, in the reduction step the increased length part caused by pushing down the slab (2) is to advance without backward by the supporting step.
[96]
[97]
Figure 4 is a side view showing yet an embodiment of the case where the slab (2), a front end portion (2a) to the rolling mill 20 chiip in playing rolling device (1) of the present invention, Figure 7 is played in the invention in the rolling step at the rolling method is a flow chart also showing the one embodiment.
[98]
4 and to Figure 7, the rolling step of the play the rolling method according to an embodiment of the present invention, passed to the first rolling stand (21) opens the front end portion (2a) of said slab (2) in which chiip step, entering the front end portion (2a) of said slab (2) to the second rolling stand 22 is provided in the following the first rolling stand (21), the cast steel to the second rolling stand (22) When a portion of the slab 2, which is a reduction step and the pressure for pressing the (2) the reverse to the first rolling stand (21), the first one pairs of rolling rolls (21a) of which is provided in the rolling stand (21) Go to the upward or downward, or may include a buffer comprising: pairs of pinch rolls provided on the inlet of the first rolling stand moving upward or downward.
[99]
That is, in the as yet another embodiment of the concrete steps of the rolling step, chiip step, rolling step, a buffer stage, etc. can be provided in sequence.
[100]
[101]
The chiip step are as described in the state of the first rolling stand (21) open above as passing the front end (2a) of said slab (2),.
[102]
[103]
The rolling step is rolled with a slab (2) in the rolling roll pair provided on the front end portion (2a) of said slab (2) is entering the second rolling stand 22, and the second rolling stand (22) and a step of performing a rolling operation.
[104]
At this time, by pressing down the slab (2), the slab (2) in accordance with the reduced thickness of the slab (2) is extended, there is to the extended length portion occurs, this extended length portion the slab (2) the but also parts that move in a direction which enters the rolling mill (20), it is also generated by the part of reverse caster 10 direction.
[105]
So that the backward part is absorbed by the buffer stage to be described later, it is prevented from affecting the like caster (10).
[106]
[107]
Wherein the buffer is a step for absorbing the exerted after being generated in the reduction step. That is, the slab (2) to accommodate the increased length part is moved into the rolling roll (21a) pair provided at the rolling stand in a direction to the area of ​​the perpendicular direction to the entry to the rolling mill 20, which is generated in the reduction step that would be so.
[108]
Here, the vertical direction means that the region is a slab (2) that contains all of the upward or downward direction in the region of the direction of entry into the rolling mill (20).
[109]
Similarly, in the buffer stage to the the rolling roll (20a) pair is provided additionally provided with a pinch roll, instead of moving the rolling roll (20a) in the vertical direction of the area, moving the pinch rolls in a vertical direction area to, it may be provided to accommodate the increased length part generated in the reduction step.

WE Claims

[Claim 1]Continuous casting step of producing slabs; Playing rolling method comprising; and a rolling step of rolling the cast steel of the first rolling stand being cast front end portion provided in the continuum approach first the slab is produced in the continuous casting step, after the cast front end passage.
[Claim 2]
According to claim 1, wherein said rolling step, wherein after the first rolling stand, wherein the cast front end portion through the plurality of rolling stands in a rolling mill group comprising a playing rolling method characterized by rolling said cast steel.
[Claim 3]
The method of claim 1, wherein the rolling step is chiip passing into the first rolling stand, the open parts of the cast front end; provided to said first rolling stand, after the cast front end portion passed through the first rolling stand, supporting stage with a pair of rolling rolls to be brought into close contact with the cast slab; The front end portion and the cast rolling step for pressing the slab in the entering the second rolling stand provided on the first rolling stand and then, the second rolling stand; play rolling method comprising a.
[Claim 4]
The method of claim 1, wherein the rolling step is chiip passing into the first rolling stand, the open parts of the cast front end; the cast front end portion entering into the first the second rolling stand provided in the rolling stand, and then , a reduction step for pressing the slab in the second rolling stand; And if the main part of comfort which is pressed the reverse to the first rolling stand, the first rolling stand, a pair of rolling rolls is moved upward or downward is provided on or above the first upper pair of pinch rolls provided on the rolling stand inlet or buffer step of moving downward; play rolling method comprising a.
[Claim 5]
The method of claim 1, wherein the rolling step comprises the first rolling rolls each provided with a plurality of rolling stands including a rolling stand pair, reduce progressively interval increasing with progress the cast direction for rolling the slab in sequence playing rolling method according to claim.
[Claim 6]
Caster to produce slabs; And it located on the exit side caster, rolling mill for adding the cast front end provided with a continuum in the cast steel is produced by the caster provided with a plurality of rolling stands including a first rolling stand, which is the first entry; The it included, and the rolling mill, the rolling performance and wherein the cast front end portion which is provided to screw down the cast steel after passing through the first rolling stand.
[Claim 7]
The method of claim 6, wherein the rolling mill is provided in the exit side of the first rolling stand, the support point determining sensor for sensing the cast front end; And wherein provided in the inlet of the second rolling stand provided on the first rolling stand, and then, pressing down time is determined sensor for sensing the cast front end; play rolling apparatus having a.