JP2009178765A - Meandering prevention device for continuously cast slab, and twin drum type continuous casting equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the meandering of a slab in which both the edge parts are thin and the central part is thick upon its carrying in such a manner that its cracking, crushing an breakout are prevented. <P>SOLUTION: Regarding a slab 115 cast by a twin drum type continuous casting machine in which at least either is a recessed drum, both the edge parts are thin and the central part is thick, and both the edge sides have level difference faces α. An unsolidified molten steel lies in the central part of the slab 115, and it is soft as a whole. In either side of the slab 115, a pair of side guide rollers 211, 212 are contacted with the level difference face α while sandwiching the edge parts of the slab. In the other side of the slab 115, a pair of side guide rollers 214, 215 are contacted with the level difference face α while sandwiching the edge parts of the slab. In this way, by regulating the right and left movement of both the edge faces of the slab 115 by the rotating side guide rollers 211, 212, 214, 215, the meandering of the slab 115 is prevented. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a continuous casting slab meandering apparatus and a twin-drum type continuous casting facility, in which the thickness of the portion other than the end portion (central portion) is thicker than the thickness of the end portion in the width direction of the plate. When conveying a piece, it devised so that generation | occurrence | production of a meander could be prevented effectively.

  The continuous casting machine continuously casts molten steel that has been refined, and directly produces a slab (slab or strip). As such a continuous casting machine, a vibration mold type continuous casting machine has been conventionally used. Recently, a twin drum type continuous casting machine has been developed (for example, see Patent Document 1).

  FIG. 12 shows a general example of a twin drum type continuous casting machine 010. In this twin-drum type continuous casting machine 010, a pair of drums 011 and 012 rotating in opposite directions are arranged close to each other at the same height position. Both ends of the drums 011 and 012 in the axial direction are partitioned by side weirs 013 and 014 that are pressure-bonded to the drum end faces. Molten steel 016 is supplied through a nozzle 015 to the internal space (hot water pool) of the moving mold formed by the drums 011 and 012 and the side weirs 013 and 014.

  When the drums 011 and 012 rotate in opposite directions (when the opposite surfaces of both drums move downward so that the molten steel 016 is wound downward), the molten steel 016 comes into contact with the drums 011 and 012 As a result, solidified shells are formed on the peripheral surfaces of the drums 011 and 012 respectively. Both the solidified shells grow as the drum rotates, and are pressed and integrated at the minimum gap portion of the drums 011 and 012 and are taken out as a cast slab 017.

According to such a twin drum type continuous casting machine 010, a strip which is a thin slab can be produced in a large amount and at a high speed.
The strip generally refers to a slab having a plate thickness of 3 mm or less.

Furthermore, in recent years, a twin-drum type continuous casting machine has been studied and developed in which the drum shape is devised so as to increase the thickness of the cast slab (for example, see Patent Document 2).
This example will be described with reference to FIGS. 14 is a view taken in the direction of arrows XIV-XIV in FIG.

  As shown in FIGS. 13 and 14, in this twin drum type continuous casting machine 10, a pair of concave drums 11 and 12 rotating in opposite directions are arranged close to each other in parallel at the same height position. The both ends of the concave drums 11 and 12 in the axial direction are partitioned by side weirs 13 and 14 that are in close contact with the drum end surfaces. Molten steel 16 is supplied through the nozzle 15 to the internal space (hot water reservoir) formed by being surrounded by the concave drums 11 and 12 and the side weirs 13 and 14.

The concave drum 11 has step portions 11a and 11b at both ends of the drum.
The concave drum 12 has step portions 12a and 12b at both ends of the drum.
That is, each of the concave drums 11 and 12 has a diameter at both end portions along the axial direction of the drum that is larger than a diameter at a central portion (portion other than both end portions) along the axial direction of the drum.

  When the concave drums 11 and 12 rotate in directions opposite to each other, the molten steel 16 is cooled by contacting the surfaces of the concave drums 11 and 12 (this surface also includes the surfaces of the step portions 11a, 11b, 12a, and 12b). The solidified shells 21 and 22 are formed. The solidified shells 21 and 22 grow as the drum rotates.

And it formed in the outer periphery of step part 11a, 11b among solidification shells 21 in the gap between step part 11a and step part 12a, and the minimum gap part where the gap between step part 11b and step part 12b becomes the smallest. The part and the part formed in the outer periphery of step part 12a, 12b among the solidification shells 22 are press-contacted and integrated by the narrow pressure by step part 11a, 11b and step part 12a, 12b.
As a result, both ends of the solidified shell 21 and the solidified shell 22 are pressure-welded and integrated, and both the solidified shells 21 and 22 are joined in a bag binding shape as shown in FIG. Thus, the slab 23 is obtained.

  The slab 23 in a state in which the solidified shells 21 and 22 are pressed in a bag-bound form at the minimum gap portion and the molten steel 16 is left in the central portion is drawn out from the concave drums 11 and 12 and is transported, and is cooled in the middle of transport. As a result, the molten steel 16 in the center portion also solidifies.

The slab 23 thus cast has a portion (center portion) other than the end portion in the plate width direction with respect to the thickness of the end portion in the plate width direction.
For example, the plate thickness at the end portion in the plate width direction is several mm, and the plate thickness at the portion (center portion) other than the end portion in the plate width direction is 30 to 70 mm. By using the concave drums 11 and 12 in this way, a thick slab 23 can be cast.

According to the twin-drum continuous casting machine 10 configured as shown in FIGS. 13 and 14, a slab, which is a thick slab, can be produced in a large amount and at a high speed.
The slab generally refers to a slab having a plate thickness of 30 to 70 mm.

  As the concave drum, for example, as shown in FIG. 15 (a), a drum D having stepped portions d at both ends (drum used in the twin-drum continuous casting machine of FIGS. 13 and 14), As shown in FIG. 15 (b), both ends of the drum D are tapered and have stepped portions d, and as shown in FIG. 15 (c), both ends have stepped portions d. The drum D can be a drum having various shapes such as a drum whose diameter gradually decreases toward the center in the axial direction.

  If at least one of the two drums provided in the twin-drum type continuous casting machine is a concave drum, the solidified shell can be pressed and joined in a bag binding shape, and the cast slab can be made thicker. it can.

For example, if a drum of the type shown in FIG. 15A is adopted as the two drums, a slab having a cross-sectional shape shown in FIG. 16A can be manufactured.
If the drum of the type shown in FIG. 15A is adopted as one drum and a flat drum (a drum having the same diameter in all axial portions of the drum) is adopted as the other drum, FIG. A slab having a cross-sectional shape shown in FIG.
Furthermore, if a drum of the type shown in FIG. 15B is adopted as the two drums, a slab having a cross-sectional shape shown in FIG. 16C can be manufactured.
If a drum of the type shown in FIG. 15B is adopted as one drum and a flat drum (a drum having the same diameter in all axial portions of the drum) is adopted as the other drum, FIG. A slab having a cross-sectional shape shown in FIG.

In addition, in the slabs of FIGS. 16A to 16D, a plate having a portion where the thickness of the end portion is thin and a portion where the thickness of the portion other than the end portion (central portion) is thick. A surface caused by the difference in thickness is defined as a step surface α. In the slabs of FIGS. 16 (a) and 16 (c), step surfaces α are formed on the front and back sides of the slab, and in the slabs of FIGS. 16 (b) and 16 (d), a step surface α is formed on the surface side of the slab. The
Moreover, let the surface of an edge part be the edge part surface (beta). The end surface includes an end surface β on the front surface side and an end surface β on the back surface side.

The slab cast by a continuous casting machine such as a vibration mold type continuous casting machine or a twin drum type continuous casting machine leaves unsolidified molten steel in the central portion immediately after being drawn from the continuous casting machine. The part is cooled and solidified during the transfer.
Then, the cast slab is sandwiched and conveyed by, for example, a pinch roll, rolled by a rolling mill, cooled by a cooling facility, and then wound on a winding device.

When transporting a slab cast by a continuous casting machine, the thickness difference in the plate width direction (left and right) of the slab, the temperature difference between left and right, disturbance due to thermal deformation of pinch rolls and other rolls, etc. If there is, it may meander.
Therefore, there are various meandering prevention measures for preventing meandering.

  For example, in a rolling line, strip meandering is prevented using a side guide.

  In order to prevent meandering of the slab immediately after being drawn out from the vibration mold type continuous casting machine, meandering is prevented by using vertical rolls 31 and 32 as shown in FIG.

  More specifically, as shown in FIG. 17, in the vibration mold type continuous casting machine, a slab 30 having a rectangular cross section is cast while leaving unsolidified molten steel inside. Vertical rolls 31 and 32 are in rolling contact with both end faces of the slab 30. The vertical rolls 31 and 32 are rotationally driven so as to have a roll peripheral surface speed corresponding to a speed along the conveyance direction of the slab 30 (conveyed in a direction perpendicular to the paper surface in FIG. 17). For this reason, the meandering of the slab 30 in the left-right direction is regulated by the vertical rolls 31 and 32 to prevent meandering.

  In addition, in a continuous casting facility that employs a twin-drum type continuous casting machine that casts a strip that is a thin slab, adopting a configuration as shown in FIG. This is prevented (see, for example, Patent Document 3).

  More specifically, as shown in FIG. 18, the twin-drum type continuous casting machine 40 includes two flat drums, and casts a strip 41 that is a slab having a thin plate thickness. This strip 41 is rolled by a rolling mill 42. The rolling mill 42 is provided with a leveling device 43.

  A meandering detector 44 that detects meandering of the strip 41 is arranged upstream of the rolling mill 42 in the transport direction of the strip 41. When the meandering detector 44 detects the meandering of the strip 41, the control device 45 controls the leveling control by the rolling mill 42 with the leveling device 43 to prevent meandering. That is, control is performed so as to adjust the difference between the left and right gaps of the rolling rolls in the rolling mill 42 so as to prevent meandering.

Further, in a continuous casting facility that employs a twin drum type continuous casting machine that casts a strip that is a thin slab, a pinch roll disposed on the downstream side of the twin drum type continuous casting machine and a rolling mill Some have a bridle device having a steering mechanism at a position and a meandering detector upstream of the rolling mill.
In some cases, the meandering is prevented by steering the bridle device so as to correct the meander detected by the meander detector (see, for example, Patent Document 4).

JP2004-50220 JP 2006-175488 A JP2003-39108A JP-A-8-187506

By the way, as shown in FIG. 13 and FIG. 14, the slab which is a thick slab cast by a twin drum type continuous casting machine provided with a concave roll has a so-called bag binding shape, and is in the sheet width direction. A portion (center portion) other than the end portion in the plate width direction is thicker than the plate thickness of the end portion.
In other words, the slab has a thick plate at the center in the plate width direction, and thin ends (edges) are formed at both ends. Moreover, unsolidified molten steel remains in the central portion for a while immediately after being drawn from the twin-drum continuous casting machine.
For this reason, in the state before reaching the complete solidification, the slab is generally soft and bulging is likely to occur.

Moreover, recently, there is a tendency to increase the plate speed of the slab and increase the drum rotation speed to increase the slab conveyance speed. As a result, an attempt is being made to produce a bag-bound slab in which the thickness of the solidified portion is thin despite the large plate thickness.
The thickness of the solidified part is reduced because the drum rotation speed is fast, so that the time for the molten steel to come into contact with the drum is shortened and the solidified shell is pulled out of the drum before it grows sufficiently thick. Because it ends up.

When such a slab having a large plate thickness but a thin solidified portion is pulled out from the twin-drum continuous casting machine and is conveyed, meandering may occur.
However, conventionally, there has been no means for effectively preventing this meandering.

For example, when using a side guide used in a rolling line to prevent meandering of a bag-bound slab, if the soft slab is in strong contact with the side guide, the solidified end will be lost. There is a risk of cracking or crushing.
Furthermore, the solidified end portion may sink into the unsolidified portion of the central portion and break out.
For this reason, a side guide cannot be employed in order to prevent meandering of the bag-shaped slab.

In addition, when trying to prevent meandering of the bag-strip-shaped slab by the reduction leveling control, since there is a large amount of unsolidified molten steel inside, there is a risk that the slab will be crushed when reduced.
For this reason, in order to prevent meandering of the bag-shaped slab, the reduction leveling control cannot be employed.

  Furthermore, when trying to adopt the rolling leveling control or the steering control by bridle roll, a meandering detector is required, and the equipment becomes large.

  In view of the above-described situation, the present invention can effectively prevent meandering of a thick cast slab (slab) having a bag binding shape, and a continuous cast slab meandering device and a twin drum type. The object is to provide continuous casting equipment.

The configuration of the meandering prevention device for the continuous cast slab of the present invention that solves the above problems is as follows.
An apparatus for preventing meandering of a continuous cast slab that prevents meandering during conveyance of a slab in which the thickness of a portion other than the end in the plate width direction is thicker than the thickness of the end in the plate width direction. ,
Rotating on the step surface caused by the difference in plate thickness between the portion where the plate thickness at the end of the slab is thin and the portion where the plate thickness of the portion other than the end of the slab is thick The contacting side guide rollers are arranged at both side positions in the plate width direction of the slab.

Further, the configuration of the continuous casting slab meandering prevention device of the present invention is as follows.
An apparatus for preventing meandering of a continuous cast slab that prevents meandering during conveyance of a slab in which the thickness of a portion other than the end in the plate width direction is thicker than the thickness of the end in the plate width direction. ,
Rotating on the step surface caused by the difference in plate thickness between the portion where the plate thickness at the end of the slab is thin and the portion where the plate thickness of the portion other than the end of the slab is thick A pair of side guide rollers that are in contact with each other and sandwich the end portion of the slab from the front surface side and the back surface side are disposed at both side positions in the plate width direction of the slab.

Further, the configuration of the continuous casting slab meandering prevention device of the present invention is as follows.
The side guide roller is formed integrally with an end portion of a support roller that contacts the surface of the slab and an end portion of a support roller that contacts the back surface of the slab.

The configuration of the twin drum continuous casting equipment of the present invention is as follows.
A concave drum provided with a pair of drums rotating in opposite directions, wherein at least one of the drums has a diameter of an end portion along the axial direction larger than a diameter of a portion other than the end portion along the axial direction; A twin-drum type continuous casting machine capable of casting a slab in which the thickness of the portion other than the end in the plate width direction is thicker than the thickness of the end in the plate width direction. ,
The plate thickness of the portion where the thickness of the end portion of the slab cast by the twin drum type continuous casting machine is thin and the portion where the thickness of the portion other than the end portion of the slab is thick And a meandering prevention device for continuous cast slabs, wherein side guide rollers that are in contact with the stepped surface caused by the difference are arranged at both side positions in the plate width direction of the slab. .

The configuration of the twin drum continuous casting equipment of the present invention is as follows.
A concave drum provided with a pair of drums rotating in opposite directions, wherein at least one of the drums has a diameter of an end portion along the axial direction larger than a diameter of a portion other than the end portion along the axial direction; A twin-drum type continuous casting machine capable of casting a slab in which the thickness of the portion other than the end in the plate width direction is thicker than the thickness of the end in the plate width direction. ,
Rotating on the step surface caused by the difference in plate thickness between the portion where the plate thickness at the end of the slab is thin and the portion where the plate thickness of the portion other than the end of the slab is thick A meander of a continuous cast slab that is in contact with each other and has a pair of side guide rollers that sandwich the end portion of the slab from the front side and the back side at positions on both sides in the plate width direction of the slab. And a prevention device.

The configuration of the twin drum continuous casting equipment of the present invention is as follows.
The side guide roller is formed integrally with an end portion of a support roller that contacts the surface of the slab and an end portion of a support roller that contacts the back surface of the slab.

The configuration of the twin drum continuous casting equipment of the present invention is as follows.
The side guide roller is driven to rotate so that a peripheral speed of a roller peripheral surface is synchronized with a conveyance speed of the slab.

  According to the present invention, since the side guide roller is brought into rolling contact with the stepped surface of the slab that has a bag binding shape, the slab can be meandered without fear of crushing or breaking out of the slab. It can be effectively prevented.

  The best mode for carrying out the present invention will be described below in detail based on examples.

FIG. 1 is a configuration diagram showing a twin drum type continuous casting facility 100 according to a first embodiment of the present invention.
This twin-drum type continuous casting equipment 100 includes a twin-drum type continuous casting machine 110, a continuous cast slab meandering prevention device 200, a pinch roll 130, a side trimmer 140, and a winding device 150.

In the twin drum type continuous casting machine 110, a pair of concave drums 111 and 112 rotating in opposite directions are arranged close to each other in parallel at the same height position, and both axial ends of the drums 111 and 112 are It is partitioned by side weirs 113 and 114 that are in close contact with the drum end surface. Molten steel is supplied to an internal space (bath pool) surrounded by the drums 111 and 112 and the side weirs 113 and 114 through a nozzle (not shown).
The concave drums 111 and 112 are drums having the shape shown in FIG.

When the drums 111 and 112 rotate in directions opposite to each other, from the twin-drum type continuous casting machine 110, a bag-bound slab (slab) 115 is cast and pulled out while leaving the molten steel at the center.
The cross-sectional shape of the slab 115 is the shape shown in FIG. 16A, and the slab 115 has a step surface α caused by a difference in plate thickness between the end portion and a portion other than the end portion (center portion). Have.

  The cast slab 115 is prevented from meandering by a meandering prevention device 200 for continuous cast slabs arranged along a conveying path between the twin-drum continuous caster 110 and the pinch roll 130, and a support roller ( The front and back surfaces are supported by (not shown in FIG. 1) and conveyed while preventing breakout.

  The slab 115 thus transported is wound up by the winding device 150 after the side trimmer 140 cuts and removes both end portions in the plate width direction (portions where the plate thickness is thin).

  Next, the configuration of the continuous casting slab meandering prevention apparatus 200 will be described with reference to FIG. 2 showing the slab 115 in a plan view and FIG. 3 which is a III-III cross section of FIG. In FIG. 2, the arrow indicates the conveyance direction of the slab 115.

  As shown in FIGS. 2 and 3, the slab 115 is conveyed while the bulging is prevented by the support roller 101 coming into contact with the front and back surfaces thereof. And the meandering prevention apparatus 200 of the continuous cast slab is arrange | positioned in the position between the support rollers 101 along the conveyance direction of the slab 115. FIG.

  The meandering prevention device 200 for each continuous cast slab is disposed on the other side in the plate width direction of the slab 115 and the side guide rollers 211 and 212 and the roller support portion 213 arranged on one side of the slab 115 in the plate width direction. The side guide rollers 214 and 215 and the roller support portion 216 are configured. The side guide rollers 211, 212, 214, and 215 are so-called roller-shaped rollers.

The roller support part 213 supports the side guide rollers 211 and 212 so that they can freely rotate.
Then, on one side in the plate width direction of the slab 115, the side guide roller 211 has its roller top surface in contact with the step surface α on the surface side of the slab 115, and its roller peripheral surface is an end portion on the surface side of the slab 115. It is in rolling contact with the surface β.
Further, on one side of the slab 115, the side guide roller 212 has its roller top surface in contact with the step surface α on the back surface side of the slab 115 and its roller peripheral surface is transferred to the end surface β on the back surface side of the slab 115. It touches.
For this reason, on one side of the slab 115, the pair of side guide rollers 211 and 212 on the upper and lower sides sandwich the end portion of the slab 115 from the front surface side and the back surface side, and the top surface of the roller contacts the step surface α.

On the other hand, the roller support portion 216 supports the side guide rollers 214 and 215 so that they can freely rotate.
Then, on the other side in the plate width direction of the slab 115, the side guide roller 214 has its roller top surface in contact with the step surface α on the surface side of the slab 115, and its peripheral surface is the end of the surface side of the slab 115. It is in rolling contact with the surface β.
Further, on the other side of the slab 115, the side guide roller 215 has a roller top surface that contacts a step surface α on the back surface side of the slab 115, and the roller peripheral surface is transferred to an end surface β on the back surface side of the slab 115. It touches.
Therefore, on the other side of the slab 115, the pair of side guide rollers 214 and 215 vertically sandwich the end portion of the slab 115 from the front surface side and the back surface side, and the top surface of the roller contacts the step surface α.

  As a result, on one side of the slab 115, the side guide rollers 211 and 212 are in contact with the slab 115 and follow and rotate to contact the stepped surface α, and on the other side of the slab, the side guide rollers 214 and 215 are moved to the slab 115. The slab 115 is prevented from meandering by contacting the stepped surface α while being in contact with and rotating.

As described above, the side guide rollers 211, 212, 214, and 215 rotate while sandwiching the end portion of the slab 115 from the front and back surfaces and rotate while being in contact with the step surface α. Since the movement in the direction) is restricted, meandering can be reliably prevented without causing the slab 115 to be crushed or cracked even if there is a large amount of unsolidified portion inside.
Further, a meandering detector and a large control device are unnecessary, and meandering can be prevented with a simple configuration.

Next, a continuous cast slab meandering prevention apparatus 300 according to Embodiment 2 of the present invention will be described with reference to FIG.
The continuous cast slab meandering prevention device 300 is arranged on the other side of the slab 115 in the plate width direction with the side guide rollers 311 and 312 and the roller support portions 313a and 313b arranged on one side of the slab 115 in the plate width direction. The side guide rollers 314 and 315 and the roller support portions 316a and 316b are configured. The side guide rollers 311, 312, 314, and 315 are so-called roller-shaped rollers, and the roller rotation shaft is different from that in FIG. 3 along the plate thickness direction.

The roller support portions 313 a and 313 b rotate the side guide rollers 311 and 312, and the roller peripheral speeds of the side guide rollers 311 and 312 are synchronized with the conveyance speed of the slab 115.
Then, on one side of the slab 115, the side guide roller 311 has a roller circumferential surface that is in rolling contact with a step surface α on the surface side of the slab 115, and a roller top surface that is in contact with the end surface β on the surface side of the slab 115. is doing.
Further, on one side of the slab 115, the side guide roller 312 has a roller peripheral surface that is in rolling contact with a step surface α on the back surface side of the slab 115, and a roller top surface that is in contact with the end surface β on the back surface side of the slab 115. is doing.
Therefore, on one side of the slab 115, the pair of side guide rollers 311 and 312 on the upper and lower sides sandwich the end portion of the slab 115 from the front surface side and the back surface side, and the roller circumferential surface is in rolling contact with the step surface α.

On the other hand, the roller support portions 316 a and 316 b rotate the side guide rollers 314 and 315 so that the roller peripheral speeds of the side guide rollers 314 and 315 are synchronized with the conveying speed of the slab 115.
Then, on the other side of the slab 115, the side guide roller 314 has its roller peripheral surface in contact with the stepped surface α on the surface side of the slab 115, and its top surface in contact with the end surface β on the surface side of the slab 115. is doing.
Further, on the other side of the slab 115, the side guide roller 315 has its roller peripheral surface in contact with the stepped surface α on the back surface side of the slab 115, and the roller top surface in contact with the end surface β on the back surface side of the slab 115. is doing.
For this reason, on the other side of the slab 115, the pair of side guide rollers 314 and 315 on the upper and lower sides sandwich the end portion of the slab 115 from the front surface side and the back surface side, and the roller circumferential surface is in rolling contact with the step surface α.

  Therefore, on one side of the slab 115, the side guide rollers 311 and 312 that are driven and rotated are in contact with the step surface α of the slab 115, and on the other side of the slab, the side guide rollers 314 and 315 that are driven and rotated are By rolling contact with the step surface α, meandering of the slab 115 is prevented.

As described above, the side guide rollers 311, 312, 314, and 315 that rotate while pinching the end portion of the slab 115 from the front and back sides and rotate while being in contact with the stepped surface α rotate in the plate width direction (left and right) of the slab 115. Since the movement in the direction) is restricted, meandering can be reliably prevented without causing the slab 115 to be crushed or cracked even if there is a large amount of unsolidified portion inside.
Further, a meandering detector and a large control device are unnecessary, and meandering can be prevented with a simple configuration.

  Next, a meandering prevention device 400 for a continuous cast slab according to Embodiment 3 of the present invention will be described with reference to FIG. 5 showing the slab 115 in plan view and FIG. 6 showing a VI-VI cross section of FIG. . In FIG. 5, the arrows indicate the conveyance direction of the slab 115.

  The side guide roller device 400 integrally forms a side guide roller 411 on one end side of a support roller 101 that supports the surface side of the slab 115, and a side guide roller 414 on the other end side of the support roller 101, and The side guide roller 412 is integrally formed on one end side of the support roller 101 that supports the back side of the slab 115, and the side guide roller 415 is integrally formed on the other end side of the support roller 101.

  Each side guide roller 411, 412, 414, 415 has a disk shape. In addition, in this example, the support roller 101 and the side guide rollers 411 and 414 on the front surface side, and the support roller 101 and the side guide rollers 412 and 415 on the back surface side are driven to rotate by contacting the slab 115. Yes.

Then, on one side of the slab 115, the pair of side guide rollers 411 and 412 on the upper and lower sides sandwich the end portion of the slab 115 from the front surface side and the back surface side with the roller peripheral surface, and the roller end surface contacts the step surface α. To do.
On the other side of the slab 115, the pair of side guide rollers 414 and 415 on the upper and lower sides sandwich the end portion of the slab 115 from the front surface side and the back surface side with the roller peripheral surface, and the roller end surface contacts the step surface α. .

Thus, the side guide rollers 411, 412, 414, and 415 that rotate while sandwiching the end portion of the slab 115 from the front and back surfaces and rotate while contacting the stepped surface α are arranged in the plate width direction (left and right) of the slab 115. Since the movement in the direction) is restricted, meandering can be reliably prevented without causing the slab 115 to be crushed or cracked even if there is a large amount of unsolidified portion inside.
Further, a meandering detector and a large control device are unnecessary, and meandering can be prevented with a simple configuration.

  Next, a continuous casting slab meandering prevention apparatus 500 according to Embodiment 4 of the present invention will be described with reference to FIG. In this example, the slab 115a has a cross-sectional shape as shown in FIG.

  This side guide roller device 500 integrally forms a side guide roller 511 on one end side of the support roller 101 that supports the surface side of the slab 115a, and a side guide roller 514 on the other end side of the support roller 101, and The side guide roller 512 is integrally formed on one end side of the support roller 101 that supports the back side of the slab 115a, and the side guide roller 515 is integrally formed on the other end side of the support roller 101.

  Each side guide roller 511, 512, 514, 515 has a bowl shape. In addition, in this example, the support roller 101 and the side guide rollers 511 and 514 on the front surface side, and the support roller 101 and the side guide rollers 512 and 515 on the back surface side are rotationally driven by a motor or the like.

Then, on one side of the slab 115a, the pair of side guide rollers 511 and 512 on the upper and lower sides sandwich the end portion of the slab 115a from the front surface side and the back surface side by the roller peripheral surface, and the roller arc surface becomes the step surface α. Contact.
On the other side of the slab 115a, a pair of upper and lower side guide rollers 514 and 515 sandwich the end portion of the slab 115 from the front surface side and the back surface side with the roller peripheral surface, and the roller arc surface contacts the step surface α. To do.

As described above, the side guide rollers 511, 512, 514, and 515 that rotate while sandwiching the end portion of the slab 115a from the front and back surfaces and rotate while contacting the stepped surface α are arranged in the plate width direction (left and right) of the slab 115a. Since the movement in the direction) is restricted, meandering can be reliably prevented without causing the slab 115a to be crushed or broken even if there is a large amount of unsolidified portions inside.
Further, a meandering detector and a large control device are unnecessary, and meandering can be prevented with a simple configuration.

    Next, a continuous cast slab meandering prevention device 600 according to Embodiment 5 of the present invention will be described with reference to FIG. In this example, the slab 115a has a cross-sectional shape as shown in FIG.

  This side guide roller device 600 integrally forms a side guide roller 611 on one end side of the support roller 101 that supports the surface side of the slab 115a, and a side guide roller 614 on the other end side of the support roller 101, and The side guide roller 612 is integrally formed on one end side of the support roller 101 that supports the back side of the slab 115a, and the side guide roller 615 is integrally formed on the other end side of the support roller 101.

  Each of the side guide rollers 611, 612, 614, 615 has a so-called “top” shape. In addition, in this example, the support roller 101 and the side guide rollers 611 and 612 on the front surface side, and the support roller 101 and the side guide rollers 613 and 614 on the back surface side are driven to rotate by contacting the slab 115a. Yes.

Then, on one side of the slab 115a, the pair of side guide rollers 611 and 612 at the upper and lower sides sandwich the end portion of the slab 115a from the front surface side and the back surface side with the roller peripheral surface, and the inclined roller surface is a step surface α. Contact.
On the other side of the slab 115, the pair of side guide rollers 614 and 615 on the upper and lower sides sandwich the end portion of the slab 115a from the front surface side and the back surface side with the roller peripheral surface, and the inclined roller surface contacts the step surface α. To do.

In this way, the side guide rollers 611, 612, 614, and 615 rotate while sandwiching the end portion of the slab 115a from the front and back surfaces and rotate while contacting the step surface α, so that the plate width direction of the slab 115a (left and right) Since the movement in the direction) is restricted, meandering can be reliably prevented without causing the slab 115a to be crushed or broken even if there is a large amount of unsolidified portions inside.
Further, a meandering detector and a large control device are unnecessary, and meandering can be prevented with a simple configuration.

    Next, a continuous cast slab meandering prevention apparatus 700 according to Embodiment 6 of the present invention will be described with reference to FIG. In this example, the slab 115b has a cross-sectional shape as shown in FIG.

  In this continuous cast slab meandering prevention device 700, a side guide roller 711 is integrated with one end side of the support roller 101 that supports the surface side of the slab 115b, and a side guide roller 714 is integrated with the other end side of the support roller 101. It is formed and configured.

  Each of the side guide rollers 711 and 714 has a disk shape. In addition, in this example, the front-side support roller 101 and the side guide rollers 711 and 714 are driven to rotate by contacting the slab 115b.

Then, on one side of the slab 115b, the end surface of the side guide roller 711 comes into contact with the stepped surface α, and the end portion of the slab 115b is supported on the front surface side and the back surface side by the support roller 101 on the peripheral surface and the back surface side of the side guide roller 711. And sandwiched between.
On the other side of the slab 115, the end surface of the side guide roller 714 comes into contact with the stepped surface α, and the end portion of the slab 115b is moved between the front surface side and the back surface side by the support roller 101 on the peripheral surface and the back surface side of the side guide roller 714. From.

In this way, the side guide rollers 711 and 714 that rotate while contacting the step surface α regulate the movement of the slab 115b in the plate width direction (left and right direction). However, the meandering can be reliably prevented without the slab 115b being crushed or broken.
Further, a meandering detector and a large control device are unnecessary, and meandering can be prevented with a simple configuration.

Next, as Example 7, a twin-drum continuous casting facility 100A will be described with reference to FIG.
This twin drum type continuous casting equipment 100A includes a twin drum type continuous caster 110, a continuous cast slab meandering prevention device 200, a pinch roll 130, a side trimmer 140, a rolling mill 160, a cooling device 170, A winding device 150 is provided.

The slab 115 cast by the twin-drum continuous casting machine 110 is meandered by the meandering prevention device 200 for continuous cast slabs arranged along the conveying path between the twin-drum continuous casting machine 110 and the pinch roll 130. In addition, the front and back surfaces are supported by the support roller and conveyed while preventing breakout.
The slab 115 transported in this manner is cut and removed by the side trimmer 140 at both ends in the plate width direction (portions where the plate thickness is thin), rolled by the rolling mill 160, and supplied to the cooling device 170. Then, after being cooled, it is taken up by the take-up device 150.

  Instead of the continuous casting slab meandering prevention device 200, the above-described continuous casting slab meandering prevention devices 300 to 700 may be used.

Next, as an eighth embodiment, a twin-drum continuous casting facility 100B will be described with reference to FIG.
This twin drum type continuous casting equipment 100B includes a twin drum type continuous caster 110, a continuous cast slab meandering prevention device 200, a pinch roll 130, a coil box 180, a side trimmer 140, a rolling mill 160, A cooling device 170 and a winding device 150 are provided.
In the eighth embodiment, the slab 115 cast by the coil box 180 is once wound, and the wound slab 115 is wound back, and then rolled and cooled, and wound on the winding device 150.

  Instead of the continuous casting slab meandering prevention device 200, the above-described continuous casting slab meandering prevention devices 300 to 700 may be used.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows the twin drum type continuous casting installation which concerns on Example 1 of this invention. The top view which shows the meandering prevention apparatus of the continuous cast slab used for Example 1. FIG. III-III sectional drawing of FIG. Sectional drawing which shows the meandering prevention apparatus of the continuous cast slab which concerns on Example 2 of this invention. The top view which shows the meandering prevention apparatus of the continuous cast slab which concerns on Example 3 of this invention. Sectional drawing which shows the VI-VI cross section of FIG. Sectional drawing which shows the meandering prevention apparatus of the continuous cast slab which concerns on Example 4 of this invention. Sectional drawing which shows the meandering prevention apparatus of the continuous cast slab which concerns on Example 5 of this invention. Sectional drawing which shows the meandering prevention apparatus of the continuous cast slab which concerns on Example 6 of this invention. The block diagram which shows the twin drum type continuous casting installation which concerns on Example 7 of this invention. The block diagram which shows the twin drum type continuous casting installation which concerns on Example 8 of this invention. The block diagram which shows the general example of a twin drum type continuous casting machine. The block diagram which shows the twin drum type continuous casting machine which uses a concave drum. FIG. 14 is an XIV-XIV arrow view of FIG. 13. The block diagram which shows the various examples of a concave drum. Sectional drawing which shows the various examples of a slab. The block diagram which shows an example of the conventional meander prevention means. The block diagram which shows another example of the conventional meander prevention means.

Explanation of symbols

100, 100A, 100B Twin-drum type continuous casting equipment 101 Support roller 110 Double-drum type continuous casting machine 111, 112 Drum 113, 114 Side weir 200, 300, 400, 500, 600, 700 Meandering prevention device for continuous cast slab 211 , 212, 214, 215 Side guide rollers 213, 216 Roller support portions 311, 312, 314, 315 Side guide rollers 313a, 313b, 316a, 316b Roller support portions 411, 412, 414, 415 Side guide rollers 511, 512, 514 , 515 Side guide roller 611, 612, 614, 615 Side guide roller 711, 714 Side guide roller

Claims (7)

An apparatus for preventing meandering of a continuous cast slab that prevents meandering during conveyance of a slab in which the thickness of a portion other than the end in the plate width direction is thicker than the thickness of the end in the plate width direction. ,
Rotating on the step surface caused by the difference in plate thickness between the portion where the plate thickness at the end of the slab is thin and the portion where the plate thickness of the portion other than the end of the slab is thick An apparatus for preventing meandering of a continuous cast slab, characterized in that the side guide rollers that come into contact are disposed at both side positions in the plate width direction of the slab. An apparatus for preventing meandering of a continuous cast slab that prevents meandering during conveyance of a slab in which the thickness of a portion other than the end in the plate width direction is thicker than the thickness of the end in the plate width direction. ,
Rotating on the step surface caused by the difference in plate thickness between the portion where the plate thickness at the end of the slab is thin and the portion where the plate thickness of the portion other than the end of the slab is thick A continuous casting cast characterized in that side guide rollers that are in contact with each other and are paired with the end portions of the slab sandwiched from the front surface side and the back surface side are arranged at both side positions in the plate width direction of the slab. A piece meandering prevention device. In claim 1 or claim 2,
The said side guide roller is integrally formed in the edge part of the support roller which contacts the surface of the said slab, and the edge part of the support roller which contacts the back surface of the said slab, The continuous casting characterized by the above-mentioned A device to prevent slab meandering. A concave drum provided with a pair of drums rotating in opposite directions, wherein at least one of the drums has a diameter of an end portion along the axial direction larger than a diameter of a portion other than the end portion along the axial direction; A twin-drum type continuous casting machine capable of casting a slab in which the thickness of the portion other than the end in the plate width direction is thicker than the thickness of the end in the plate width direction. ,
The plate thickness of the portion where the thickness of the end portion of the slab cast by the twin drum type continuous casting machine is thin and the portion where the thickness of the portion other than the end portion of the slab is thick A meandering prevention device for continuous cast slabs, in which side guide rollers that come into contact with the stepped surface caused by the difference are arranged at both side positions in the plate width direction of the slab, and
A twin-drum continuous casting facility characterized by comprising: A concave drum provided with a pair of drums rotating in opposite directions, wherein at least one of the drums has a diameter of an end portion along the axial direction larger than a diameter of a portion other than the end portion along the axial direction; A twin-drum type continuous casting machine capable of casting a slab in which the thickness of the portion other than the end in the plate width direction is thicker than the thickness of the end in the plate width direction. ,
Rotating on the step surface caused by the difference in plate thickness between the portion where the plate thickness at the end of the slab is thin and the portion where the plate thickness of the portion other than the end of the slab is thick A meander of a continuous cast slab that is in contact with each other and has a pair of side guide rollers that sandwich the end portion of the slab from the front side and the back side at positions on both sides in the plate width direction of the slab. A prevention device;
A twin-drum continuous casting facility characterized by comprising: In claim 4 or claim 5,
The side guide roller is formed integrally with an end portion of a support roller that contacts the surface of the slab and an end portion of a support roller that contacts the back surface of the slab. Type continuous casting equipment. In any one of Claims 4 thru | or 6,
The twin-drum type continuous casting facility, wherein the side guide roller is rotationally driven so that a peripheral speed of a roller peripheral surface is synchronized with a conveying speed of the slab.

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