JPS60196249A - Side gate plate for molten metal pool in roll type continuous casting machine - Google Patents

Abstract

PURPOSE:To enable continuous change of the thickness of a billet by consisting of a side gate plate of a wedge-shaped central gate plate having a tapered end face and side gate plates in contact therewith and making the central gate plate movable in a vertical direction and the side gate plates in the direction between the roll centers. CONSTITUTION:A side gate plate 10 to be provided in the front and rear position in the longitudinal direction of horizontal casting rolls 1, 2 is divided to three parts so that a wedge-shaped central gate plate 11 formed with tapered end faces 11a on both sides and side gate plates 12 having tapered end faces 12a to contact with the plate 11 and arced ends 12b to contact with the rolls 1, 2 are provided. The gate 11 is further made vertically movable by a hydraulic cylinder 13 and the plates 12 are made movable in the direction between the centers of the rolls 1, 2 by hydraulic cylinders 14. The relative positions of the plates 11, 12 are continuously moved by the cylinders 13, 14 to change the spacing T1 between the rolls 1 and 2 in the case of changing the thickness T1 of the billet. The continuous change of the set thickness of the billet is thus made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The invention relates to a side weir plate for a molten metal pool formed above a pair of horizontal casting rolls in a roll-type continuous casting machine.

[Prior art]

Generally, in a roll type continuous casting machine, as shown in Figs. 1 and 2, each horizontal casting roll 1, 2 is placed parallel to each other and on the upper part of the opposite side of a pair of opposing horizontal casting rolls 1, 2. Two roll longitudinal weir plates 3 provided almost in contact with the upper surface
and a side dam plate 4 having an arcuate end surface 4a which is provided at a front and back position in the longitudinal direction of the rolls between the longitudinal dam plates 3 of both rolls and substantially contacts the upper surfaces of the opposite sides of the horizontal casting rolls 1 and 2. Molten metal is continuously poured into the molten metal pool 5 to form a molten metal pool 5, and the partially solidified metal is poured into the molten metal pool 5 through the gap between the left and right horizontal casting rolls 1 and 2 rotating in the direction of arrow (A). Rt-drawing and continuously casting the metal sheet A'.

In conventional roll-type continuous casting machines, it is possible to continuously change the set width of the metal sheet to be cast by moving the side weir plate 4 in the longitudinal direction of the roll. Since it is a single plate with an arc-shaped end surface 4at that contacts the upper surface of the horizontal casting rolls 1 and 20 on the opposite side for 11 minutes, the setting plate for the metal plate material λ to be cast is set by changing the gap between the left and right horizontal casting rolls 1 and 2. When changing the thickness, it is necessary to replace the side dam plate with a predetermined size prepared to match the set thickness, and the replacement work is extremely complicated and has low work efficiency.

[Purpose of the invention]

This invention was made to solve the above-mentioned conventional drawbacks, and it is possible to continuously change the set thickness of the metal plate to be cast in a roll-type continuous casting machine, so that the work of changing the plate thickness can be carried out. The purpose is to obtain a side weir plate for a molten metal pool that can be efficiently constructed.

[Structure of the invention]

The structure of the present invention will be explained based on the first embodiment shown in FIGS. 3 and 4. The side dam plates 10 of the present invention are arranged parallel to each other,
Further, they are provided at front and rear positions in the longitudinal direction of a pair of horizontal casting rolls 1 and 2 which are arranged to face each other, and form side walls of the molten metal pool 5. The above description is common to the conventional one shown in FIGS. 1 and 2, and will be explained using the same symbols. In the present invention, the side dam plate 1o is divided into three parts, the width of the plate narrows downward, and there are tapered end surfaces on both sides.
1a, and tapered end surfaces 12a1 disposed on both sides of the wedge-shaped central dam plate (hereinafter abbreviated as the central dam plate) and in contact with the tapered end surface 11a of the central dam plate 11. and a side weir plate 12 having an arcuate end surface 12b that contacts the upper surface of the opposite side of the horizontal casting rolls 1 and 2, and the central weir plate 11 is movable in the vertical direction by, for example, a hydraulic cylinder 13. The side weir plate 12 is movable in the direction between the centers of both the horizontal casting rolls 1 and 2 (in the left-right direction in FIG. 3), for example, by a hydraulic cylinder 14. In addition, in the side weir plate 12 of the embodiment, a portion below the minimum gap between both horizontal casting rolls 1.2, that is, a cooling zone portion 12c is integrated.

Next, to explain the operation, in the state shown in Figs. 3 and 4, the roll gap is TI and the plate material with the plate thickness T1 is to be cast. , While the central weir plate 11 is raised by the hydraulic cylinder 13, the left and right hydraulic cylinders 14 move the υ side weir plates 12 toward the center, and the left and right horizontal casting rolls 1,
2 are brought close to each other and the roll gap is T2, then the fifth
The state shown in the figure is reached and the plate thickness is set to T2. In this case, since the roll gap can be arbitrarily and continuously changed according to the vertical amount of the central dam plate 11, the setting of the plate thickness can be arbitrarily and continuously changed.

The means for moving the central dam plate 11 or the side dam plates 12 is not particularly limited. For example, as shown in FIG. This can be achieved by a mechanism in which interlocking worms 16 are provided and the worms 16 are rotated to move vertically or horizontally via the rack 15, or by other mechanisms.

The shapes of the tapered end surface of the central weir plate 11 and the tapered surfaces 12& of the side weir plates 12 can be made into various shapes in order to widen the mutual contact area and prevent leakage of molten metal. For example, the central weir plate 17 shown in FIGS. 7 and 8 has horizontal casting rolls 1, in addition to being vertically tapered.
2 has a tapered end surface 17a that is tapered in the thickness direction so as to narrow toward the center in the longitudinal direction. The central dam plate 18 shown in FIG. 9 has a tapered end surface 1 formed in an arc shape.
It has 8a'z. Central weir plate 19 shown in Figure 10
has a tapered end surface ic+a on which a protrusion 19'a is formed. The central dam plate 20 shown in FIG. 11 has a concave groove 20'.
It has a tapered end surface 201L having a shape a. Each central weir plate 17, 18, 19 shown in FIGS. 7 to 11.
20 is used, the tapered end surface of the side weir plate is naturally shaped to match those shapes. Therefore, the contact area of the tapered end surface in these cases is wider than that in FIGS. 3 and 4, and is effective in preventing leakage of molten metal.

〔Effect of the invention〕

As explained above, the side dam plate of the present invention provides the following excellent effects.

CI) The side weir plate is divided into six parts: a wedge-shaped central weir plate with tapered end surfaces on both sides, and side weir plates that touch on both sides; the wedge-shaped central weir plate extends vertically, and the side weir plates extend horizontally. Since it is movable, by adjusting the wedge-shaped central weir plate by moving it up and down, the overall width of the side weir plate can be changed continuously ((), and therefore the gap between the left and right horizontal casting rolls can be continuously changed). The set plate thickness can be changed arbitrarily and continuously.

(It) The operation to change the overall width of the side weir plates does not require the conventional replacement work, and can be done by moving the center weir plate up and down and the side weir plates left and right, so it is easy to change the set plate thickness. Work efficiency has been significantly improved compared to before.

[Brief explanation of the drawing]

Figure 1 and Figure 2 show a conventional example. Figure 1 is a perspective view of the vicinity of the molten metal pool of a roll type continuous casting machine, Figure 2 is a sectional view taken along the line n-■ in Figure 1, and Figure 3 11 shows an embodiment of the present invention, FIG. 3 is a front view of the side weir plate, FIG. 4 is a plan view of the main part, and FIG. 5 is a side view showing one mode of operation. FIG. 6 is a front view of the side weir plate portion showing another embodiment of the weir plate moving mechanism, and FIG. 7 is a front view of the side weir plate portion showing another embodiment of the central weir plate. FIG. 8 is a perspective view of the central weir plate in FIG. 7, and FIGS. 9, 10, and 11 are perspective views showing still other embodiments of the central weir plate. 1.2... Horizontal casting roll, 5... Molten metal pool, 10... Side weir plate, 11. 17.
18. 19゜20・・・Wedge-shaped central dam plate, ll
a, 17a. 181L, 19 FL, 20 a-... Tapered end surface,
12=...side weir plate, 12a...tapered end surface,
12b... Arc-shaped end surface, 13.14... Hydraulic cylinder, 15... Rack, 16... Worm. jI6 Figure 7 Figure 11 l/ll Figure 8 Figure 9

Claims (1)

[Claims] A side weir plate, which is provided at the front and rear positions in the longitudinal direction of a pair of horizontal casting rolls arranged parallel to each other and facing each other, and forms a side wall of a molten metal pool,
A wedge-shaped central weir plate whose plate width is sandwiched downward and tapered end surfaces are formed on both sides, and a wedge-shaped central weir plate that is arranged on both sides of this wedge-shaped central weir plate and contacts the tapered end surfaces of the wedge-shaped central weir plate. A side weir plate having a tapered end face and an arcuate end face in contact with the upper surface of the opposite side of the horizontal casting roll. A side weir plate for a molten metal pool in a roll type continuous casting machine, characterized in that it is movable in the center-to-center direction.