KR101867738B1

KR101867738B1 - Mold and Segment Structure

Info

Publication number: KR101867738B1
Application number: KR1020160178536A
Authority: KR
Inventors: 한병하
Original assignee: 주식회사 포스코
Priority date: 2016-12-23
Filing date: 2016-12-23
Publication date: 2018-06-15

Abstract

The present invention provides a mold and a segment connecting structure which prevents a decrease in operation efficiency due to equipment replacement due to metal attachment, comprising: a mold including a long side copper plate and a short side copper plate, and having a larger space formed by a lower portion cross sectional surface of the long side copper plate and the short side copper plate than a space formed by a middle cross sectional surface; and a segment located in a lower portion of the mold, and performing cooling by receiving a cast piece formed in the mold.

Description

Mold and Segment Structure

The present invention relates to a connection structure of a mold and a segment used for continuous casting and continuous rolling capable of improving workability.

In the strand for continuous casting molds and segments are installed. The molten steel passes through the mold and is first cooled to form a solidified shell, and it is common that the first cooled die in the mold is all cooled while passing through the segments.

Fig. 1 shows the layout of such continuous casting.

As shown in Fig. 1, the mold 10 cools molten steel with a cooling section 11 including a copper plate. The mold 10 provides a cast with the solidified shell formed thereon as a lower segment. At the lower portion of the mold 10, a guide roll 13 is attached to the mold long-edge copper plate 11 and the short-edge copper plate to guide the cast steel during casting.

Such a guide roll 13 can guide the casting by a segment, but since the guide roll 13 is now attached to the guide roll 13 in the event of an abnormality such as a breakout during use, it is necessary to exchange the equipment.

(Patent Document 1) KR10-2007-0043256 A

The present invention aims at preventing the deterioration of the working efficiency due to the replacement of the equipment due to the attachment as described above.

In order to achieve the above object, the present invention provides the following mold and segment connection structure.

The present invention provides a method of manufacturing a mold comprising a long side copper plate and a short side copper plate, wherein a space formed by the lower end face of the long side copper plate and the short side copper plate is larger than a space formed by the intermediate face and a lower portion of the mold, And a mold and a segment connection structure including a segment for receiving and cooling the formed cast product.

In the mold and the segment connection structure of the present invention, the billet formed by the long side and the short side of the mold can be physically supported for the first time by the roll of the segment.

In one embodiment of the mold and segment connection structure of the present invention, the mold and the segment may include a position defining member that defines the position of each other.

In this case, the mold may include a protruding portion protruding toward the segment side, and the segment may include a pair of guide wheels disposed with a gap into which the protruding portion can be inserted.

In one embodiment of the mold and segment connection structure of the present invention, the long-side copper plate of the mold may be tapered to extend downward, or alternatively, the long-side copper plate of the mold may be rounded to extend downward.

In an embodiment of the present invention, only a cooling spray may be arranged in a configuration that affects the cast between the mold and the segment.

The present invention provides mold and segment connection structures that do not require a guide roll at the lower part of the mold, so that even when equipment such as breakout occurs, it is unnecessary to replace the equipment due to the guide roll at this time, and work efficiency can be improved.

1 is a schematic view showing the layout of a conventional continuous casting apparatus.
2 is a schematic view of one embodiment of the mold and segment connection structure of the present invention.
Figure 3 is a schematic side view of the embodiment of Figure 2;
4 is a schematic view of a mold of an embodiment of the present invention.
FIG. 5 is a schematic view of a mold according to an embodiment of the present invention, viewed from below.

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

2 to 3 show the mold and segment connection structure of the present invention. More specifically, FIG. 2 is a schematic view of the mold and segment connection structure of the present invention, and FIG. 3 is a side view of the connection structure of FIG.

As shown in FIG. 2, the mold and the segment connecting structure of the present invention include a mold 10 and a segment 20 disposed immediately below the mold 10. The segments are arranged continuously until the solidification of the casting is completed. The continuous segments 20 are known in the art and are omitted from the explanation of the embodiment of the present invention.

The mold 10 includes a cooling part 11 including a fix side 12 and a copper plate and a fixing part 12 is connected to the outside to fix the mold 10.

A segment 20 is disposed below the mold 10. In the segment 20, a plurality of rolls are arranged in the vertical direction (left and right direction in the figure) around the cast steel. One of the upper and lower frames 21 of the segment 20 is fixed and one can be configured as a movable type, but the present invention is not limited thereto. The segment 20 is also connected to the outside and fixed.

That is, in one embodiment of the present invention, each of the mold 10 and the segment 20 is connected to the outside.

In the structure that affects the cast steel between the mold 10 and the segment 20 of the present invention, only the cooling spray 18 for spraying the cooling water is disposed, and no structure that affects the cast steel is disposed. That is, a guide roll physically supporting a cast steel having a solidified shell in the mold at the lower portion of the mold 10 does not exist in the mold and segment connection structure of the present invention.

In the present invention, since the cast steel passed through the mold 10 must be supplied to the segment 20 without any guide, alignment of the mold 10 and the segment 20, In this embodiment, the mold and the segment include a position defining member that defines the position in the horizontal plane of each other for this alignment.

A protrusion 16 protruding downward from the mold 10 in the mold 10 with this position defining member and a pair of guides 16 arranged with a gap into which the protrusion 16 can be inserted in the segment 20, The wheels 22a, 22b are shown in Figures 2 and 3.

The guide wheels 22a and 22b may have a structure in which the guide wheels 22a and 22b are gathered in the direction of the segment 20 so as to be easily inserted between the guide wheels 22a and 22b in the case of the projections 16. In addition, And is configured to rotate to vibrate in the up-and-down direction and rotate to facilitate entry.

In this embodiment, the guide wheels 22a and 22b are arranged so that their lengthwise directions coincide with the widthwise direction of the main shaft. However, the present invention is not limited thereto, and the guide wheels 22a and 22b can be inserted with the projections 16, It may be said that it is arranged in a different way.

It is preferable that the position defining members are all disposed on the fixing portion 12 / the segment frame 21 on both sides in the up-and-down direction of the casting so as to regulate the movement between the mold 10 and the segment 20, .

In the present invention, since the positions of the mold 10 and the segment 20 on the horizontal plane are limited by the position defining members such as the projecting portion 16 and the guide wheels 22a and 22b, May be supplied between the rollers of the segment 20 and physically supported by the rollers for the first time in the rollers of the segment 20.

4, an embodiment of the mold 10 of the present invention is shown. The first embodiment of the mold 10 in the case of Fig. 4 (a) and the second embodiment of the case of Fig. 4 (b) are shown.

As shown in FIG. 4, the mold 10 has to pass the casting with the solidified shell in the cooling unit 11 to the segment 20 without the guide roll, and to prevent the casting from affecting the casting, And an extension surface 17 is formed at the bottom.

4 (a)) or taper (see Fig. 4 (b)), the cooling surface 11 of the mold 10 may be formed as a round surface (see Fig. It goes without saying that it may have various shapes as long as the lower end face is enlarged. At this time, it is preferable that the degree of round or taper is about 1/4 to 3/4 of the thickness of the copper plate of the cooling part 11. More preferably, the degree of roundness or taper is about half of the thickness of the copper plate of the cooling section 11.

Fig. 5 is a bottom view of the mold 10 of the present invention. As shown in FIG. 5, the extension surface 17 is formed not only on the long side but also on the short side copper plate 13. That is, the area A2 formed by the end face of the copper plate on the long side and the bottom end face of the copper plate on the short side may be larger than the area formed by the intermediate face A1 on the upper side, It may not interfere with the casting at the bottom of the long-side copper plate.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof,

10: mold 11: cooling section
12: Fixing portion 16:
17: Extension surface 18: Cooling spray
20: Segment 21: Frame
22a, 22b: guide wheel

Claims

Wherein the long-side copper plate is tapered so as to extend downward, and a space formed by the bottom surface of the long-side copper plate and the short-side copper plate is larger than a space formed by the intermediate surface;
And a segment located at a lower portion of the mold for receiving and cooling the cast product formed in the mold,
Wherein the billet formed by the long side and the short side of the mold is physically supported for the first time by the roll of the segment.

delete

The method according to claim 1,
Wherein the mold and the segment include a position defining member that defines a position of each of the mold and the segment.

The method of claim 3,
Wherein the mold includes a protrusion protruded toward the segment side,
Wherein the segment includes a pair of guide wheels disposed with a gap into which the protrusion can be inserted.

delete

The method according to claim 1,
Wherein only cooling sprays are disposed in a configuration that affects the cast between the mold and the segment.