KR100761721B1 - Rolling mill having wiper - Google Patents

Abstract

A wiper employed rolling mill which improves productivity by constructing wipers assembled with rolling work rolls in a double structure, thereby closely adhering the wipers and surfaces of the rolls to each other, and reduces quality defects of a plate by protecting rolling mill facilities is provided. A wiper employed rolling mill comprises: an upper work roll(2) installed above the plate(7) passing through transfer rolls(8) after a plate(7) has been extracted from a reheating furnace such that the upper work roll presses the plate; strippers(3) installed at both sides of the upper work roll in an upper part of the plate; roll cooling water parts(10) installed at one sides of the strippers to spray cooling water to an inner side of the upper work roll; and two-stage wipers(11b) installed below the strippers in a lower part of the roll cooling water parts to minimize sojourn water remained on an upper part of the plate, wherein both front ends of the two-stage wipers are bent to form second sojourn water inducing parts for inducing sojourn water, and assembling grooves with predetermined width and length are formed on lower portions of the strippers such that the two-stage wipers are clamped to the assembling grooves by means of a plurality of clamping members.

Description

Rolling mill with wiper {ROLLING MILL HAVING WIPER}

1 is a configuration diagram schematically showing the configuration of a rolling mill employing a wiper according to the prior art.

FIG. 2 is a perspective view of main parts of FIG. 1; FIG.

Figure 3 is a schematic diagram showing the overall configuration of a rolling mill employing a wiper according to the present invention.

4 is a detailed view of the 'A' part of FIG.

FIG. 5 is an assembly view of only the wiper structure main portion of FIG. 3. FIG.

6 is an exploded perspective view of FIG. 5;

<Description of the symbols for the main parts of the drawings>

2. upper work roll

3. Stripper

7. Plate

10. Roll Coolant Part

11b. 2 step wiper

12. Induction space

13. First stay induction part

14. Two-stage stay guide

15. Liner

16. Bolt

17. Nut

19. Assembly groove

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill employing a wiper, and more particularly, a phenomenon in which a roll cooling water for forced cooling generated during rolling in a rolling mill partially falls in each part of a thick plate being rolled to generate a temperature deviation of a rolled material. The present invention relates to a rolling mill in which a wiper is employed to prevent the generation of retention water.

As shown in Fig. 1 and Fig. 2, for example, the material extracted from the heating furnace of the steel mill passes through the feed roll 8, and the material is sent to the rolling mill, and the high-pressure water beam 4 is placed upward in the rolling mill. The stripper 3 is installed on both sides.

In addition, in order to avoid the high heat of the thick plate 7 during rolling, the upper backup roll 1 and the lower backup roll 6 are provided, and the upper work roll 2 and the lower work roll 5 are provided.

And in order to protect a rolling roll, the roll cooling water part 10 is installed in both sides, and sprays cooling water into the upper work roll 2 inside.

And the wiper 11a was installed in the work roll of the rolling mill using the liner 15, and the phenomenon which the cooling water falls to the upper part of the rolling material was prevented.

By the way, since the structure of the conventional wiper 11a has a cross-sectional structure, a large amount of the retention water 9 is generated in the lower thick plate 7 after the roll cooling water is supplied during rolling, and thus the blade material changes and the shape of the blade changes seriously. There is a problem that productivity decreases due to an increase in rolling pass due to an appropriate temperature change.

The present invention was created in order to solve the above problems, by changing the structure of the wiper assembled in the rolling work roll in a double structure in close contact with the surface of the roll to improve productivity, protect the mill equipment to reduce the poor plate quality It is an object of the present invention to provide a rolling mill employing as many wipers as possible.

The rolling mill employing the wiper of the present invention for achieving the above object, the upper work roll which is installed in the upper portion of the thick plate which is extracted from the heating furnace and passes through the feed roll; Strippers provided on both sides of the upper work roll; A roll cooling water part installed at one side of the stripper to spray cooling water into the upper work roll; It is characterized in that it comprises a; two-stage wiper is installed in the stripper to the lower portion of the roll cooling water to minimize the number of stays on the upper plate.

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

3 is a schematic view showing the overall configuration of a rolling mill employing a wiper according to the present invention, Figure 4 is a detailed view of the 'A' part of Figure 3, Figure 5 is a wiper of Figure 3 An assembly view of only the structural main parts is shown, and an exploded perspective view of FIG. 5 is shown in FIG. 6.

Referring to each of the drawings, the rolling mill employing the wiper according to the present invention, for example, is installed on the upper plate of the thick plate 7 which is extracted from the heating furnace of the steel mill and passes through the transfer roll 8 to press the thick plate 7 An upper work roll 2, a stripper 3 provided on both sides of the upper work roll 2 above the rear plate 7, and provided on one side of the stripper 3 to the inside of the upper work roll 2; The roll cooling water part 10 for spraying the cooling water, and a two-stage wiper 11b installed at the lower part of the stripper 3 under the roll cooling water part 10 to minimize the water retention on the upper plate 7 is included. It is configured by.

In addition, the two-stage wiper 11b is installed in close contact with the upper work roll 2, and is specifically installed in double contact with the upper work roll 2 in the stripper 3.

In addition, an assembly groove 19 having a predetermined width and length is formed at the lower end of the stripper 3, and the second stage wiper 11b is formed in the assembly groove 19 by a plurality of fastening members such as bolts 16 and nuts. Is fastened by 17.

At this time, the two-stage wiper 11b is fastened to the assembly groove 19 inside the stripper 3 by using the liner 15. Therefore, assembling holes (not shown) are formed at regular intervals in the two-stage wiper 11b, and through holes 18 are also formed in the stripper 3 to fasten the bolt 16 and the nut 17.

One side of the assembly groove 19 is formed with a second stage wiper 11b to block the cooling water from the roll cooling water part 10 and to form a first staying water induction part 13 to guide the retention water.

In addition, the two-stage wiper 11b assembled in the assembling groove 19 has a 'c' shape and is provided with a second stay water induction part 14 to induce retention water. Residual water collected by is formed in both spaces of the stripper (3) is provided with an induction space (12) to send the residing water.

And the stripper 3 with the high pressure water beam 4 as the upper side is provided in both sides, and the upper backup roll 1 and the lower backup roll 6 are installed in order to avoid the high heat of the thick plate 7 during rolling, In this case, the upper work roll 2 and the lower work roll 5 are installed, and in order to protect the rolling roll, the cooling water is injected into the upper work roll 2 from both sides of the roll cooling water part 10.

Referring to the operation of the rolling mill employing the wiper according to the present invention having the configuration as described above are as follows.

Referring to the drawings again, the wiper is a rolling mill employing a wiper structure in which a two-stage wiper (11b) is in close contact with the upper work roll (2) to minimize the number of stays on the rear plate (7) .

That is, the second stage wiper 11b is attached to the inside of the stripper 3 so as to prevent the roll cooling water 10 from falling intensively on the lower rear plate 7 and the upper work roll 2. And a double-stage retention water induction part 13 and a two-stage retention water induction part 14 for blocking the cooling water of the roll cooling water part 10 and inducing the retention water by being in close contact with each other in a double space. The number of stays is sent to (12).

This will be described in more detail.

First, the cooling water for rolling mill roll cooling water supply is sent at a pressure of 5 to 7 kg / cm² to supply the cooling water to the roll cooling water part 10, and two stages are provided on the surface of the preassembled high-pressure water beam 4 and the upper work roll 2. Cooling water is supplied while the wiper 11b is in close contact.

And the induction water is sent to the induction space (12) formed on both sides, and the slab (slab) of high heat in the heating furnace is rolled while moving backward to the rolling mill.

In addition, by repeating the material slab around the rolling mill to move forward and backward to produce a thick plate (7) for each work size in width, thickness and length.

According to the present invention, by changing the structure of the wiper (11b) assembled in the upper work roll (2) in double, and close to the surface of the upper work roll (2) is scattered into the space, bringing a large amount of material fall off the blade plate locally, As a result, the temperature of the blades dropped, thereby improving the problems caused by the decrease in production due to the increased rolling pass.

As described above, the rolling mill employing the wiper according to the present invention has the following effects.

The workability is ensured by using the two-stage wiper on the rolling mill work roll high pressure water beam contact surface to guide the coolant to the lower thick plate in both guide spaces as needed, without the coolant remaining on the surface of the work. In addition to improved quality and shorter working time for thin plates, it is possible to improve productivity and protect the mill equipment, thereby reducing the defect of thick plates.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (7)

An upper work roll, which is installed at an upper portion of the thick plate which is extracted from a heating furnace and passes through the transfer roll, pressurizes the thick plate, a stripper provided on both sides of the upper work roll, and installed on one side of the stripper and into the upper work roll. A roll cooling water unit for spraying cooling water, and a two-stage wiper installed on the stripper under the roll cooling water unit to minimize the water retention on the upper plate, The two-stage wiper is provided with a second stay water induction portion to be bent both ends of the 'c' form to guide the retention water, An assembly groove having a predetermined width and length is formed at the lower end of the stripper so that the second stage wiper is fastened to the assembly groove by a plurality of fastening members. Rolling mill adopting wiper. The method of claim 1, The wiper is a rolling mill, characterized in that the two-stage wiper is installed in close contact with the upper work roll. The method of claim 1, And the two-stage wiper is provided in double contact with the upper work roll in the stripper. delete The method of claim 1, One side of the assembly groove, the wiper is adopted rolling mill, characterized in that together with the wiper is formed a first retention water induction portion to block the cooling water from the roll cooling water portion and guide the retention water. delete The method of claim 1, The rolling mill employing a wiper, characterized in that the retention water collected by the two-stage retention water induction part is provided with an induction space to send the retention water formed in both spaces of the stripper.

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