JPH0688072B2 - Continuous casting and rolling equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a continuous casting and rolling facility for rolling a thin slab cast by a continuous casting machine to produce a thin rolled plate, and more particularly,
The present invention relates to a continuous casting and rolling facility equipped with a device that winds a coil and rewinds it while preventing heat dissipation of a thin slab.

[Conventional technology]

An example of winding a thin plate slab obtained by a continuous casting machine to manufacture a coil and then rewinding and reducing the thickness of the coil is disclosed in JP-A-58-100903. As an apparatus for obtaining a rolled plate in one piece from a slab obtained by such continuous casting, how to reduce the high-temperature heat dissipation of the slab is one of the reasons for reasonably manufacturing a rolled plate. However, in Japanese Patent Application Laid-Open No. 58-100903, there is no means for preventing heat dissipation when winding a cast slab and manufacturing a coil.

Further, as a means provided with a means for preventing heat dissipation when manufacturing a coil, it is disclosed in Japanese Patent Laid-Open No. 58-100904, in which only a device for forming a slab obtained by continuous casting into a coil is used. A boxed device is described.

[Problems to be solved by the invention]

In the above-mentioned conventional technique, a slab produced by a continuous casting machine is once wound into a coil, and then the slab is unwound and subjected to thickness reduction rolling, so that the following problem of heat dissipation of the slab occurs.

That is, the processing speed from casting to winding on the casting line cannot be set to a high speed because it is limited by the casting speed of the casting machine. On the other hand, the rolling line speed is almost unlimited and high-speed rolling is possible.

Therefore, there is a big problem that the temperature of the slab decreases due to heat radiation from the slab on the casting line. In particular, since it takes a long time to wind the coil of the slab, heat radiation during the winding work becomes a problem.

Usually, the size of the slab to be wound around the coil is a plate thickness of 20 to 35 mm, and the plate width is 600 to 1600 mm. Moreover, the winding speed of this slab is 10 to 15 m / min in synchronization with the casting speed. Since the weight of the coil after being wound is as high as 15 to 20 tons, it takes about 5 to 10 minutes to wind one coil. Since the winding time is long as described above, the above-mentioned JP-A-58-100903 is used.
In the case where the coil is wound in an open state as in Japanese Patent Laid-Open Publication No. 2003-242242, it is difficult to realize direct rolling without reheating, because the temperature drop of the coil is large. Therefore, the above-mentioned JP-A-58-
In the case of Japanese Patent No. 100903, it was often necessary to supply heating energy to the coil housing to reheat it. In particular, in the above-mentioned Japanese Patent Laid-Open No. 58-100903, the bending mechanism of the slab is not disclosed, but since the coil is wound in the downward direction, the coil is actually formed above the coil. A large number of cast bending roller mechanisms etc. need to be arranged.

Therefore, since it is difficult to provide a mechanism for preventing heat dissipation during winding of the cast slab, the cast slab is wound in an open state.

The heat radiation of the coil is prevented only by the coil housing portion that houses the coil after winding.

In JP-A-58-100904, although the coil forming device can prevent the heat dissipation of the slab, when the coil manufactured by the coil forming device is transferred to the coil rewinding device which is the next step, the slab does not have any heat dissipation prevention. Not considered.

Further, both Japanese Patent Laid-Open No. 58-100903 and Japanese Patent Laid-Open No. 58-100904 do not consider the fact that the coil is rapidly transferred from the coil forming device to the coil rewinding device.

The object of the present invention is to quickly and quickly prevent the heat dissipation of thin slabs,
It is an object of the present invention to provide a continuous casting and rolling facility capable of manufacturing a coil with a coil forming device and rewinding the coil with a coil rewinding device.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a plate-shaped slab cast by a continuous casting machine is coiled by bending the plate-shaped slab arranged on a horizontal plane upward. In a continuous casting and rolling facility for winding a coil of a predetermined length by a coil forming device for forming a coil, and rewinding the coil by a coil rewinding device to reduce the thickness of the plate-shaped slab by a rolling device. A coil supporting device for rotating the coil in a horizontal plane is arranged between the coil rewinding device and the coil forming device, the coil supporting device and the coil rewinding device are provided with a coil heat retaining cover. is there.

[Action]

It enables the installation of a coil heat retention cover that prevents heat dissipation of the coil by winding up a high temperature plate-shaped slab continuously cast on a substantially horizontal surface by a coil forming device,
Further, in order to rewind the coil with a rewinding device and continuously roll the plate-shaped slab with a rolling device, the coil supporting device rotationally moves the end portion of the coil to the rolling mill side,
Each coil setting portion of the coil forming device, the coil rotation moving device, and the rewinding device is covered with a coil heat retaining cover.

That is, when the slab is formed into a coil and is rewound, the heat retention cover of the coil can prevent the slab from radiating heat, and the coil formed by the coil supporting device can be quickly transferred to the coil rewinding device. .

〔Example〕

 A first embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, a heat retaining cover for a coil is provided in the coil transfer device to prevent heat dissipation from the coil during coil formation. In FIG. 1, the coil heat dissipation preventing means is provided only in the coil forming device, but this is for the purpose of explaining the coil heat dissipation preventing means of the coil forming device in particular.

The cast slab 8 to be wound is continuously poured from a Dan tissue 1 through a nozzle 2 into a mold composed of a belt 5 which is guided by guide rollers 3, 4, and 7 and rotated in the arrow direction. Manufactured by. This slab is bent by a bending roller 6, and the horizontal bending roller 10 incorporated in a stand 12 is pressed down by cylinders 9 and 13, and is horizontally bent by a straightening machine having an intermediate roll 14.

If necessary, the width is adjusted by a width rolling machine provided with a hard roll 15 and a horizontal roll 16.

The slab 8 thus passed is bent upward by a coil forming device having two lower bending rollers 31 and one upper bending roller 32 to form the coil 30. The coil 30 is supported by a support roller 33 during winding.

In this embodiment, the slab is bent upward in this way to wind up the coil, and during coil winding, the coil heat retaining cover 54 that covers the coil setting portion in order to prevent heat radiation from the coil.
This makes it easy to install.

The wound coil 30 is transferred to the coil support roller 37. FIG. 1 is a cross-sectional view showing the heat retention state of the coil and the transfer of the coil in the coil setting portion of the coil forming device in this case.

The coil being wound, which will be described with reference to FIG. 2, is supported by a support roller 33 attached to a coil winding stand 28. The support roller 33 is rotationally driven by a drive system (not shown). When the coil is wound by a predetermined length, the shaft 26 having the rotary blade shown in FIG.
The inside is rotated to cut the slab 8. After cutting the slab, the winding speed is increased and the following operations are performed before the subsequent slab enters the winder.

In FIG. 2, the gear 58 is rotated and two coil hangers are used.
Insert 56 and 57 into the inner diameter of the coil. This hanger 56,57
In addition, the coil heat insulating cover 54 of this embodiment is attached to the hangers 56 and 57 so as to operate simultaneously with the movement of the hangers. The two hangers 56, 57 can be moved to the left and right in the suspender 59.

The movement of the hangers 56, 57 is performed by driving the gear 58 by the motor 74 of FIG. 3 showing the front cross section of FIG.

In FIG. 2, the suspending tool 59 is suspended on the elevating frame 66 via the pin 60 and the bearing 61.

Then, the motor 65 rotates the pinion 62 via the reduction gear 64 to rotate the gear 63 attached to the suspending tool 59, and eventually the suspending tool 59 is rotated so that the coil 30 can be rotated on the horizontal plane.

The rotation of the coil 30 on the horizontal plane is carried out on the support roller 37 shown in FIG. 1 in order to orient the coil end 34 toward the rolling mill. As a result, on the coil rewinding roller 40 of the next coil rewinding machine, it is possible to align with the leading end ejection direction of the coil.

Now, in FIG. 2, the elevating frame 66 is moved up and down by vertically moving a piston 67 of a cylinder 69 supported by a bearing stand 68 provided on a coil transfer carriage 70. In this way, the coil 30 is lifted from the support roller 33, and the coil moving carriage 70 is caused to travel by the wheels 71 on the rail 72 on the garter 73. This traveling operation will be described with reference to FIG. After being lifted by the elevating frame 66, the coil 30 is transferred to the next coil supporting roller 37.

During the transfer of the coil, the suspending tool 59 shown in FIG. 2 is rotated and rotated 180 degrees on the horizontal plane so that the end of the coil is oriented in the rolling direction.

At this position, the coil hangers 56 and 57 shown in FIG. 2 are removed from the inner diameter of the coil, and the hangers 56 and 57 are removed from the cylinder 69.
To raise the temperature and keep the next coil warm, the coil is returned to the coil forming device position. This operation is repeated in the actual operation.

If the coil needs to be stored, a coil heat-retaining furnace 90 may be provided as shown in FIG. 4 showing the plane arrangement of FIG.

The coil is transferred from the arrow A to the direction B, C in the coil warming furnace 90 and transferred to the coil rewinding roller 40.

Of course, the coil heat retaining cover 54 may be fixedly attached to the hanger 59 as shown in FIG. In this case, the hole 50 is provided so that the coil support portions of the hangers 56 and 57 can pass through.

In addition, the coil heat insulating cover 54 of FIG. 5 has a structure shown in FIG. 1 in order to avoid a collision between the cover and the coil when returning to the coil forming device side after feeding the coil 30 to the coil supporting roller 37. As shown in FIG. 6, the cover 133 divided around the hinge 132 may be lifted by a cylinder (not shown) or the like. Of course, after passing through the coil, return this cover in the E direction.

Further, at this point, the winding on the supporting roller 33 is often started in FIG.

Therefore, when the coil 30 at the beginning of winding on the support roller 33 exists, the cover on the left side toward the paper surface of FIG. 6 is lifted up in the D direction around the hinge 136, and after passing through the coil portion, in the F direction. Just go back to.

By doing so, the required stroke of the lifting cylinder 69 shown in FIG. 5 can be reduced.

As described above, the transferred coil is as shown in FIG.
The coil rewinding roller 40 is rotated, the tip of the coil is tapped by the tapping knife 41, the slab 8 is fed toward the rolling mill 42, and the hot thin plate product 44 is manufactured, which is passed through the guide roller 45 and the drum. The product coil 47 is wound around 46.

The three bending rollers shown in FIG. 1 are used as a coil forming device, and a molding device for bending a cast piece upward to make a coil is used. It is possible to easily install the coil heat-retaining cover without the need for a device for rewinding the coil, and redirecting the coil end to the rolling direction is performed in the process of transferring it to the coil rewinding device, which shortens the heat radiation time. it can. When a coil is manufactured at a speed that is synchronized with the production of cast slabs by a manufacturing machine in this way, a coil with a heat retaining cover is formed to obtain a high temperature coil. Compared to formation,
It is possible to prevent a temperature drop of about 50 ° C from the average temperature. With this, when handling cast slabs, a winding coil of approximately 1050 ° C is obtained, and during rolling of the coil, including the temperature drop of the slab after rewinding, the rolling mill measures 1000 ° C. It is possible to supply the above-mentioned high temperature slab.

Next, a coil forming device, a coil supporting device, and a coil rewinding device will be described.
This is shown in Fig. 8 and Fig. 8.

FIG. 7 shows a coil heat-retaining cover 54 for heat-retaining all the coil setting portions of the coil 30 on the supporting roller 33, the coil 30 on the coil supporting roller 37, and the coil 30 on the coil rewinding roller 40. It is a thing.

The transfer of the coil 30 on the support roller to the coil support roller 37 is provided on the arm 104 that rotates around the rotation pin 102 attached to the pedestal 100 and the arm 104,
A swing arm type coil transfer machine constituted by a moving shaft 103 that can move in the coil axis direction is transferred as shown by a two-dot chain line. The transferred coil 30 is mounted on a rotary base 115 supporting a coil support roller 37 via a bearing 116 and a rotary base.
The coil end 34 is turned 180 degrees on the 114 using the pinion 117 and the gear 118 to orient the coil end 34 in the rolling direction. A partition 130 may be provided inside the coil heat retention cover.

Further, an upper and lower partition 141 that moves up and down in the A direction may be provided between the coil 30 on the supporting roller and the coil 30 on the coil supporting roller.

According to the present embodiment, a plate-shaped slab continuously cast on a substantially horizontal surface is wound upward by a coil forming device to form a coil, and a coil rotation moving device is used to roll the coil end portion to a rolling mill. Towards the side, the coil heat-retaining cover that prevents heat radiation from the coil covers each coil setting part from the coil formation to immediately before rolling, so that convective heat transfer to the air of the coil and heat dissipation due to radiation are minimized. In addition, it is possible to obtain a plate-shaped slab coil having a temperature higher than that of the conventional one, and it is possible to directly roll the coil obtained by the continuous slab, which has an extremely excellent effect in terms of energy saving.

When the coil is sent to or sent out from the coil heat retention furnace 90 shown in FIG. 4, as shown in FIG. 8, the wheel 111 is rotated by the rope 142 via the pin 113 and the door 120 or the door 121. , Lift upwards.

The wheel 111 is supported by a wheel bearing 110, and is rotated by a motor 112 provided on the column 109. By covering the coil from winding to rewinding with the coil heat-retaining cover in this manner, a further heat-retaining effect can be obtained.

Further, an application example of another embodiment is shown in FIG. The rolling mill used in FIG. 9 is a rolling roll 87, a reinforcing roll 88.
This is a case where the thickness reduction rolling is performed by using one rolling machine configured by the above. For the rolling work, firstly, the coil rewinding support roller 40 is used.
The slab 8 sent from the slab 8 is rolled by a rolling roll 87 and rolled, and then the rolled plate 96 is fed by a pinch roller 89, guided by a guide 91, and wound around a drum 93 as a rolling coil 92.

The rolling coil 92 is heated in the heating furnace 95. In this work, the guide 85 is tilted downward. After all the coils 30 are rolled, they are then rolled in the opposite direction by a rolling roll, the tip of which is guided by the pinch roller 84 and the guide 85,
The other drum 81 is wound on the coil 82. This work is also performed in the heating furnace 83. Rolling while winding on the left and right drums 81 and 93 is repeated. For rolling from a slab thickness of 30 mm to 2 mm, the number of rollings by the rolling roll 87 is about 5 times.

After this rolling is completed, the guide 91 is tilted downward, the product coil 47 is formed on the drum 46 via the guide roller 45, and the rolling operation is completed.

In FIG. 9, one rolling mill is arranged, but of course, two or more rolling mills may be arranged.
Compared to the tandem arrangement of rolling mills shown in the figure, there is not much advantage in terms of equipment cost.

In any case, the temperature of the slab decreases during rolling in the case where rolling is repeated in this way.

Therefore, it is important to supply a high temperature coil, but in this embodiment, since the coil is manufactured using the coil heat retaining cover,
It has the advantage that a sufficiently high temperature coil can be supplied.

In FIG. 9, the partition 130 inside the coil heat insulating cover 54 is, of course,
Like the door 120 shown in FIG. 8, the coil 30 on the coil supporting roller may be directly moved up and down and transferred to the coil rewinding roller 40 supported by the roller mount 119.

Further, in FIG. 9, if there is no problem in terms of production quantity, the coil rewinding roller 40 may be discontinued and the coil supporting roller 37 may be used as a rewinding roller.

By doing so, the number of coils in the coil heat retention cover 54 becomes two, the space becomes small, and the heat retention ability can be improved.

〔The invention's effect〕

As described above, according to the present invention, the coil is rapidly produced with the coil forming device while preventing the heat dissipation of the thin cast piece,
Provided is a continuous casting and rolling facility capable of rewinding the coil with a coil rewinding device.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a continuous casting and rolling mill showing an embodiment of the present invention, FIG. 2 is a sectional view of a coil forming device portion of FIG. 1, and FIG. 3 is a front sectional view of FIG. FIG. 4 is a plan view of FIG. 1 when a coil heat retaining furnace is used, and FIG. 5 is a cross-sectional view of a coil heat retaining cover mounting portion when the coil heat retaining cover is integrated with a suspender, and FIG. Is a front sectional view of the coil heat retention cover when the coil heat retention cover has a structure in which both sides can be opened and closed, and FIG. 7 is a diagram showing a second embodiment of the present invention. Front sectional view of the coil heat retention cover when covering each coil setting portion until returning, FIG. 8 is a transverse cross sectional view of FIG. 7 showing the opening and closing operation of the door of the coil heat retention cover, and FIG. It is a figure which shows the reversible rolling method of a slab especially in the application example of the invention. 8 ... slab, 30 ... coil, 31 ... lower bending roller, 32 ... upper bending roller, 33 ... support roller, 34 ... coil end, 37 ... coil support roller, 40 ...
… Coil rewinding roller, 42 …… Rolling machine, 44 …… Hot thin sheet product, 47 …… Rolling coil, 54 …… Coil heat retaining cover, 59
…… Lifting equipment, 66 …… Lifting frame, 70 …… Coil transfer carriage, 90 …… Coil heat furnace, 114 …… Rotating frame.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-100904 (JP, A) JP-A-58-122107 (JP, A)

Claims (1)

[Claims] 1. A coil forming device for forming a coil by bending a plate-shaped slab cast on a horizontal plane into a coil by winding the plate-shaped slab cast by a continuous casting machine in an upward direction and winding it into a coil of a predetermined length. In a continuous casting and rolling facility that rewinds the coil by a coil rewinding device and reduces the thickness of the plate-shaped slab by a rolling device, the coil is in a horizontal plane between the coil forming device and the coil rewinding device. A continuous casting and rolling facility, characterized in that a coil supporting device that is rotated by is disposed, and that the coil forming device, the coil supporting device, and the coil rewinding device are provided with a coil heat retaining cover.