KR101253881B1 - Apparatus of thin plate rolling - Google Patents

Abstract

The present invention relates to a thin plate rolling apparatus capable of rolling a heavy plate or a thin plate having a thickness of 6 mm or less.
The thin plate rolling apparatus according to the present invention for this purpose, a work roll for contacting the slab and rolling the slab into a thin plate, a reinforcement roll spaced apart from the work roll on the top of the work roll, and between the work roll and the reinforcement roll It is disposed in contact with the work roll and the reinforcement roll at the same time, characterized in that it comprises an intermediate roll to transfer the supporting force of the reinforcement roll to the work roll.

Description

Apparatus of thin plate rolling}

The present invention relates to a thin plate rolling apparatus, and more particularly, to a thin plate rolling apparatus capable of rolling a wide ultrathin thick plate in a thick plate length rolling machine.

The steel process injects molten steel from which iron ore is removed from raw iron ore into the mold of the continuous casting process through the steelmaking and steelmaking processes to manufacture slabs, etc., and then to the final products such as wire rods, coils, and thin plates. According to the appropriate process.

As such, the steel process will be changed later depending on the final product. Among them, in the heavy plate manufacturing process, the slab manufactured in the above-described casting process using a rolling apparatus is used for the plate thickness of about 6 mm to 120 mm. plate) rolling process.

This thick plate manufacturing process is a step (S1) to form a slab (S) in the heating furnace (F), as shown in Figure 1, using a rolling device to make the deburring rolling (S2) and length rolling (S3) After performing, the final product is completed through preliminary calibration (S4), accelerated cooling (S5) and hot calibration (S6).

Among them, the general thick plate rolling device 1 used in the rolling process is a four-stage rolling device, and includes a width-bearing rolling device and a length-bearing rolling device.

In general, the thick plate rolling process is to roll the slab (S) extracted from the furnace (F) to the target width of the plate through the deburring rolling, reducing the thickness to 50% or less from the initial slab (S) thickness and then length It is rolled to thickness 6mm or more through bet rolling.

2 is a cross-sectional view schematically showing a thick plate four-stage rolling apparatus according to the prior art, referring to this, the conventional four-stage rolling apparatus 1 includes a pair of reinforcing rolls (2) and the work roll (3) It is composed. In general, the diameter of the work roll 3 of the thick plate rolling apparatus 1 is about 50% of the diameter D of the reinforcing roll 2, and the work roll 3 directly contacts the slab S and the slab S. It is configured to roll.

3A and 3B are views illustrating a process of rolling a thick plate using the rolling apparatus of FIG. 2. Referring to this, as shown in Figure 3a, when rolling the thick thick plate (S) there is no problem in the rolling process because both ends of the work roll (3) does not contact, as shown in Figure 3b In the case of rolling a thin plate (S, for example, a medium plate or thin plate having a thickness of 6 mm or less), there is a problem in that both ends of the work roll 3 are in contact with each other because the plate is thin.

In particular, in the case of a thick plate rolling process in which the rolling load is larger than that of other rolling processes, the work roll 3 may be damaged when the two ends of the work roll 3 come into contact with each other during rolling.

As described above, when the thin plate is rolled using the conventional thick plate rolling apparatus, the diameter of the work roll 3 is too large and the mechanical stability of the roll is very dangerous.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, to provide a thin plate rolling apparatus capable of rolling a heavy plate or a thin plate having a thickness of 6mm or less.

The thin plate rolling apparatus according to the present invention has a work roll for contacting the slab and rolling the slab into a thin plate, a reinforcement roll disposed to be spaced apart from the work roll at an upper portion of the work roll, and disposed between the work roll and the reinforcement roll. And an intermediate roll to contact the work roll and the reinforcement roll at the same time and to transfer the supporting force of the reinforcement roll to the work roll.

In the embodiment according to the present invention, the working roll, the diameter may be formed to 30% or less of the diameter of the reinforcing roll.

In the embodiment according to the present invention, the work roll, the rotation axis may be disposed on a vertical line with the rotation axis of the reinforcement roll.

In an embodiment according to the present invention, it may further include a support roll disposed below the reinforcement roll to contact the reinforcement roll and support the reinforcement roll.

In an embodiment according to the present invention may include a roll choke inserted into the reinforcement roll, the intermediate roll, the work roll, and the support shaft to be rotatable.

In the embodiment according to the present invention, the roll choke includes a reinforcement roll choke into which the rotating shaft portion of the reinforcement roll is inserted and an auxiliary roll choke into which the intermediate roll and the work roll are inserted, and the auxiliary roll choke is the reinforcement roll. It is housed in a roll choke and can be coupled to the reinforcement roll choke.

In the thin plate rolling apparatus according to the present embodiment, the diameter of the work roll is smaller than that of the conventional one, so that a heavy plate or a thin plate of 6 mm or less can be easily rolled.

In addition, the rolling apparatus according to the present embodiment is provided with an intermediate roll, in order to connect the work roll and the reinforcement roll with a smaller diameter. In addition, since the middle roll is coupled to one side rather than the vertical center of the reinforcement roll, a separate support roll is provided to support the reinforcement roll, so that the work roll can be stably supported even if the diameter of the work roll is small. have.

Further, in the rolling apparatus according to the present embodiment, the auxiliary roll choke is formed in the same size as the conventional work roll choke. Therefore, the thin plate can be easily rolled by replacing the work roll chocks and work rolls provided in the conventional thick plate rolling apparatus with the auxiliary roll chocks and the corresponding work rolls, intermediate rolls, and support rolls according to the present invention.

1 is a view schematically showing a thick plate manufacturing process according to the prior art.
Figure 2 is a cross-sectional view schematically showing a thick plate four-stage rolling apparatus according to the prior art.
3a and 3b is a view showing a process of rolling a thick plate using the rolling apparatus of FIG.
Figure 4 is a perspective view schematically showing a thin plate rolling apparatus according to an embodiment of the present invention.
5 is a side view of the thin plate rolling apparatus shown in FIG.
FIG. 6 is a partial front view of the thin plate rolling device in the B direction of FIG. 5. FIG.

Prior to the detailed description of the present invention, the terms or words used in the present specification and claims should not be construed as limited to ordinary or preliminary meaning, and the inventor may designate his own invention in the best way It should be construed in accordance with the technical idea of the present invention based on the principle that it can be appropriately defined as a concept of a term to describe it. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, it should be noted that like elements are denoted by like reference numerals as much as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the elements in the accompanying drawings are exaggerated, omitted, or schematically shown, and the size of each element does not entirely reflect the actual size.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

On the other hand, in the following description of the present embodiment, it will be described by collectively referred to as a thin plate all the middle plate or thin plate having a thickness of 6mm or less. However, the present invention is not limited thereto.

4 is a perspective view schematically showing a thin plate rolling apparatus according to an embodiment of the present invention, FIG. 5 is a side view of the thin plate rolling apparatus illustrated in FIG. 4, and FIG. 6 is a partial front view of the thin plate rolling apparatus according to the direction B of FIG. 5. to be.

4 to 6, the sheet rolling apparatus 100 according to the present embodiment is a rolling roll including a reinforcing roll 20, a work roll 30, an intermediate roll 40, a support roll 50 ( 10) and the roll chocks 60 and 65 are comprised.

The reinforcement roll 20 may be configured similarly to the reinforcement roll 20 of the thick plate rolling apparatus 100 according to the prior art. The reinforcement roll 20 according to the present embodiment includes a barrel portion 24 and a shaft portion 22, and the same applies to all other rolling rolls 10 according to the present embodiment.

The barrel portion 24 is formed in a cylindrical shape and its outer circumferential surface is in contact with the barrel portions 44 and 54 of the other rolling roll 10 adjacent to each other and transmits rotational force.

The shaft portion 22 forms a rotation shaft of the barrel portion 24 and is formed to protrude from both ends of the barrel portion 24. This shaft portion 22 is rotatably inserted into the reinforcement roll choke 60 which will be described later.

The work roll 30 is disposed below the reinforcing roll 20. At this time, the work roll 30 is disposed such that its rotation axis is positioned on the same vertical line V as the rotation axis of the reinforcement roll 20. In addition, the work roll 30 according to the present embodiment is not directly in contact with the reinforcement roll 20 as in the related art, and is disposed to be spaced apart from the reinforcement roll 20 by a predetermined distance.

The work roll 30 according to the present embodiment is formed to have a diameter smaller than that of the work roll 3 provided in the thick plate rolling apparatus (1 of FIG. 2). More specifically, it is formed to have a diameter as small as about 50% compared to the conventional work roll (3).

As described above, the diameter of the work roll 3 of the thick plate rolling apparatus (1 of FIG. 2) according to the prior art is formed about 50% of the diameter of the reinforcing roll 2, for example, has a diameter of 800 mm or more. Therefore, the work roll 30 according to the present embodiment has a smaller diameter of about 30% or less than that of the reinforcing roll 20, and may be formed, for example, with a diameter of about 400 mm.

The intermediate roll 40 and the supporting roll 50 are provided between the reinforcement roll 20 and the work roll 30.

The intermediate roll 40 has an outer surface of the barrel 44 in contact with the work roll 30 and the reinforcement roll 20 simultaneously and supports and connects between the reinforcement roll 20 and the work roll 30. Therefore, the supporting force of the reinforcement roll 20 is transferred to the intermediate roll 40 to the work roll 30, the rotational force of the work roll 30 may be transmitted to the reinforcement roll 20 through the intermediate roll (40).

The intermediate roll 40 according to this embodiment should be able to be easily separated from the reinforcement roll choke 60 together with the auxiliary roll choke 65 described below. Accordingly, the diameter of the intermediate roll 40 is formed in such a size that the cross section of the intermediate roll 40 does not protrude to the outside within the range of the auxiliary roll choke 65 as shown in FIG. 5.

In addition, the intermediate roll 40 according to the present embodiment serves to support the work roll 30, it is preferable that the diameter is formed as large as possible. However, when the intermediate roll 40 is interposed in the vertical gap between the reinforcing roll 20 and the work roll 30, the intermediate roll 40 is formed to be very small in diameter.

Therefore, the intermediate roll 40 according to the present embodiment is disposed at a position in which the rotation axis is biased to one side, not on the vertical line V formed by the rotation axis of the reinforcement roll 20 and the work roll 30. Accordingly, the intermediate roll 40 may be formed to have the largest diameter possible, and is formed to have a diameter substantially similar to that of the work roll 30.

On the other hand, as the axis of rotation of the intermediate roll 40 is arranged to one side, not on the vertical line (V), the work roll 30 in the process of rolling the thin plate is raised and the intermediate roll 40 and the reinforcing roll 20 When a force is applied to the reinforcement roll 20, the force may be applied in the other direction (A direction), not in the upper direction on the vertical line (V).

Therefore, to prevent this, the thin plate rolling apparatus 100 according to the present embodiment is provided with a support roll (50).

The support roll 50 is disposed on the rotational axis in a position biased to the other side (A direction) of the vertical line (V), the outer surface of the barrel portion 24 is configured to contact the reinforcement roll (20). Since the support roll 50 serves only to support the reinforcement roll 20, it may be formed with a diameter smaller than the work roll 30 or the intermediate roll 40.

By the intermediate roll 40 and the support roll 50, the reinforcement roll 20 is supported on both sides about the vertical line (V).

The plurality of rolling rolls 10 according to the present embodiment configured as described above are inserted into the roll chocks 60 and 65 such that the shaft portion 22 is rotatable.

The roll chocks 60 and 65 are a reinforcement roll choke 60 into which the shaft portion 22 of the reinforcement roll 20 is inserted, and the shaft portions of the work roll 30, the support roll 50, and the intermediate roll 40 ( And a secondary roll choke 65 into which 22 is inserted.

The auxiliary roll choke 65 is received in the reinforcement roll choke 60 and is coupled with the reinforcement roll choke 60. The reinforcement roll choke 60 is also supported by a housing (not shown) of the rolling apparatus 100.

The auxiliary roll choke 65 according to this embodiment can be formed in the same size and shape as a conventional work roll choke (not shown). Therefore, in the present invention, when the thin plate must be rolled in the process of using the conventional thick plate rolling apparatus (1 in FIG. 2), the conventional work roll choke is replaced with the auxiliary roll choke 65 according to the present embodiment, and corresponding thereto By replacing the conventional work roll (3 in Fig. 2) with the work roll 30, the intermediate roll 40, and the support roll 50 according to the present embodiment can be easily rolled thin plate.

The thin plate rolling apparatus according to the present embodiment is configured as described above to easily roll a thin plate having a sheet thickness of 6 mm or less as described above. Considering the case of performing rolling with a reduction ratio of 20% at 6 mm or less, since the exit thickness is 4.8 mm, when using the existing large diameter work rolls of 800 mm or more, both ends of the work rolls come into contact with each other, resulting in work roll breakage. This becomes impossible.

Therefore, the thin plate rolling apparatus according to the present embodiment can easily roll a thin plate of 6 mm or less by forming a smaller diameter of the work roll.

In addition, the thin plate rolling apparatus according to the present embodiment is provided with an intermediate roll, in order to connect the work roll and the reinforcement roll with a smaller diameter. In addition, as the middle roll is coupled to one side, not the vertical center of the reinforcement roll, it is provided with a separate support roll to support the reinforcement roll.

In addition, since the auxiliary roll choke is formed in the same size as the conventional work roll choke, the thin-rolling apparatus according to the present embodiment uses the auxiliary roll chocks and the corresponding work rolls, intermediate rolls, and support rolls in the conventional thick plate rolling apparatus. By replacing, a thin plate can be rolled easily.

On the other hand, the thin plate rolling apparatus according to the present invention described above is not limited to the above-described embodiments, various applications are possible.

In addition, in the above-described embodiment, the rolling device used to length-roll the thin plate has been described as an example. However, the present invention is not limited thereto, and may be easily applied to width-proof rolling, and in addition, various materials or materials may be compressed or rolled. Any device can be applied widely.

100: rolling apparatus
10: rolling roll
20: reinforcement roll
30: work roll
40: middle roll
50: support roll
60: reinforcement roll choke
65: Secondary Roll Choke

Claims (6)

A working roll for contacting the slab and rolling the slab into thin plates; A reinforcement roll disposed to be spaced apart from the work roll at an upper portion of the work roll; And an intermediate roll disposed between the work roll and the reinforcement roll to contact the work roll and the reinforcement roll at the same time and to transfer the supporting force of the reinforcement roll to the work roll.
A support roll disposed under the reinforcement roll and in contact with the reinforcement roll and supporting the reinforcement roll,
A roll choke inserted into the reinforcement roll, the intermediate roll, the work roll, and the rotation shaft of the support roll to be rotatable,
The roll choke, the reinforcement roll choke is inserted into the rotary shaft portion of the reinforcement roll; And an auxiliary roll choke into which the intermediate roll and the work roll are inserted, wherein the auxiliary roll choke is accommodated in the reinforcement roll choke and coupled to the reinforcement roll choke. The method of claim 1, wherein the work roll,
Thin-film rolling device characterized in that the diameter is formed to less than 30% of the diameter of the reinforcing roll. The method of claim 1, wherein the work roll,
A thin plate rolling apparatus, characterized in that the rotating shaft is disposed on a vertical line with the rotating shaft of the reinforcement roll. delete delete delete

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