JPH0512062B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a belt-type continuous casting machine that allows the width of manufactured slabs to be freely changed.

[Prior Art] In a belt-type continuous casting machine, a side dam is constructed by stacking blocks, and each block is attached to a chain link and is provided with a pair of side dam devices that run along a guide in the form of an endless track. It has been proposed that a block of the same side dam forms the short side, is held between a pair of belts forming the long side, and is moved in synchronization with each other.

In this type of belt type continuous casting machine, it is conceivable to shift the position of the running guide of the block of each guide dam device in order to change the width of the slab. That is, as shown in FIGS. 1 and 2, each side dam device has a set of guides 2.
A and 2B are provided, and two sets of chain links 5 and 6 respectively incorporated in each side dam device are independent, and the block 3 is connected continuously to half the circumference of each set of chain links 5 and 6 via a pin. Attach and pair 2
The blocks 3 are held between a pair of belts 20 and arranged in a line, and one guide, for example 2A, of the above set is set against the other guide 2B. moving in the width direction, and in conjunction with this, moving one group of blocks 3 attached to the same guide 2A in the width direction of the slab relative to the other group of blocks 3 attached to the other guide 2B; As shown in FIG. 1, it is conceivable that the width of the slab can be changed even during casting.

[Problems to be Solved by the Invention] Changing the width of a slab in a belt-type continuous casting machine as described above can only be applied when casting a slab from a narrow width to a wide width. That is, when the width of the slab is changed from wide to narrow, the block 3 of the side dam moves along a guide forming a certain curve, for example, an arc.
When moving away from the slab, some blocks 3 at the top in the direction of movement near the boundary interfere with the stepped portion of the slab 1, making it impossible for the side dams to synchronize. FIG. 7 shows how this interference occurs. Y in the same figure
section is causing interference. The cause of the interference is that the block 3 near the boundary of the group, which has been moved a distance S toward the slab 1 to narrow the width of the slab, is parallel to the slab 1, which moves linearly. When moving along the guide 2b part, it moves in synchronization with the slab 1, but when it comes to the corner part 2a of the guide, it moves along the curve of that part, so it is attached to the chain link via a pin. block 3
This is because, as shown in FIG. 7, the velocity of the slab 1 is accelerated and exceeds that of the slab 1, and as a result, it enters into the wide part of the slab at the Y section. Therefore, in this method, the width of the slab must be changed unilaterally from the narrow side to the wide side.

The present invention aims to solve the above-mentioned problems and provide a belt-type continuous casting machine that can change the width of the slab in either direction.

[Means for Solving the Problem] The present invention includes a pair of belts that are arranged parallel to each other and rotate in opposite directions, and a belt that is sandwiched between both ends of the belt and moves in synchronization with the belt. It consists of a side dam consisting of a large number of blocks and chain links for supporting them, and two sets of endless guide rails that guide each chain link of the side dam, and both of the endless guide rails are connected through the chain links. In a belt-type continuous casting machine, the width of the mold is changed by sequentially moving blocks of the side dam by approximately half a circumference in the width direction of the belt. Among the blocks, several blocks located at the leading end on the downstream side in the moving direction from the boundary of at least half the side dam are rotatably supported at the rear by pins at the tip of the chain link, and support the aforementioned several blocks. Each connecting portion of each chain link is provided with a connecting pin and an elongated hole that allows the pin to move freely by a predetermined length in the direction of movement by the endless guide rail.

The belt-type continuous casting machine further includes a device for independently positioning the two sets of guide rails, and rotatable rollers are provided on both sides of the pin for connecting the chain links, and the belt-type continuous casting machine It may be supported by endless guide rails, and the two sets of endless guide rails may be arranged independently in the width direction of the slab on the same plane.

[Function] When the slab width is changed from wide to narrow by moving the half-round side dam block in the width direction of the belt, the slab and side dam block move synchronously in a stepped state. When the link moves away from the slab along the curved guide, the block is rotatable relative to the movable support member, and the movable support member has a sufficient gap in the direction of movement relative to the endless guide rail. Since they are movably connected to each other, the blocks move synchronously with the slab and move away from the slab in a direction perpendicular to the direction of travel of the slab.

For this reason, even when changing the slab width from wide to narrow, the block does not interfere with the stepped part of the slab when it leaves the slab at the curved part of the guide. The width of the image is changed.

Therefore, in the present invention, the width of the middle age can be changed not only from narrow to wide during casting, but also from wide to narrow, and the width of the slab can be changed freely during casting. can.

[Example] An example of the present invention will be described with reference to FIGS. 1 to 6.

As shown in FIG. 1, a pair of side dam devices 2 forming the short sides on both sides of the slab 1 are provided. Each of the side dam devices 2 has a large number of blocks 3, which are held between a pair of belts 20 rotating in opposite directions as shown in FIG.
The belt 20 and block 3 constitute a mold.

Each side dam device 2 has a circulating groove 50', 6
A pair of guides 2A and 2B are provided which have a diameter of 0' and can be moved independently in the width direction of the slab 1 by electric cylinders 7 and 7' attached to a fixed part. 5 and 6 are endless chain links connected to each other by pins, and the rollers 50 and 60 are inserted into the groove guide 2A 50' and the guide 2B 60', respectively, and are engaged with and guided by the grooves. It is now possible to circulate and move around. A large number of blocks 3 are successively attached to a half circumference of the chain link 5 to form a block group for one half circumference, and a large number of blocks 3 are continuously attached to a half circumference of the chain link 6. On the other hand, a group of blocks covering about half a circumference is formed, and a circulating side dam is formed by these two groups of blocks.
The pair of side dam blocks 3 thus formed in a circular manner are moved in the direction of arrow A in FIG. 1 by a drive device (not shown).

As shown in Fig. 3, a plurality of blocks (in Fig. 3, 3
The block 3a has an arm 3b, and the arm 3b has a chain link 8 corresponding to the block 3a.
It is pin-coupled to the tip of the pin 9 by a pin 9. Further, at the base of the chain link 8 corresponding to the block 3a, there is an elongated hole 10 extending in the moving direction of the chain link.
Adjacent chain links 8 are connected via pins 11 inserted into elongated holes 10. This allows the block 3a to rotate relative to the chain link 8, and also allows adjacent chain links 8 to move relative to each other in the direction of their movement. The length of the elongated hole 10 is such that when the chain link 8 curves and moves, it is displaced in the moving direction and can prevent interference between the slab 1 and the block 3a.

The present embodiment is constructed as described above, and a large number of blocks 3 connected to chain links 5 and 6 guided by guide grooves 50' and 60' move in a circular manner, and are connected to the belt 20. Molten metal is poured into a mold surrounded by blocks 3 held between the belts, and the mold is moved in the direction of arrow B in FIG. 1 to form mold 1.

When changing the width of the slab 1, one of the independently movable guides 2A, 2B is moved in the width direction of the slab 1 by actuating either of the electric cylinders 7, 7'. FIG. 1 shows the case where the width of the slab 1 is changed from wide to narrow. In this case, one guide 2A is moved toward the slab as shown in FIG. As a result, the same guide 2A
One group of continuous half-circle blocks 3 having rollers 50 that engage with the grooves 50' of the guide 2B move in the width direction of the slab, and the rollers 60 that engage with the grooves 60' of the other stationary guide 2B. The continuous half-circle blocks 3 of the other group having . . . retain their original positions. When the blocks 3 of one group that have been moved in the direction of the slab 1 reach the mold, a stepped portion S (see Figure 3) is formed on the slab 1 at the boundary between both block groups, as shown in Figure 1. is formed, and the width of the slab 1 is changed from wide to narrow.

The block 3 forming a narrow mold moves down together with the slab 1 in the direction of arrow B in FIG.
The slab 1 is guided by the slab 1 and moves along a curved path along the corner of the slab 1.

In this embodiment, the plurality of blocks 3a that are located at the boundary and move to the front are pin-connected to the chain link 8 via pins 9 as described above, and are rotatable with respect to the chain link 8 and adjacent to each other. Since the matching chain link 8 is movable in the direction of movement, when the chain link 8 curves and moves, the block 3a remains horizontal until it separates from the slab 1, as shown in FIG. It has a degree of freedom that allows it to move parallel to the width direction of the slab 1. For this reason, when the chain link 8 moves along the corner of the curved guide 2A as shown in FIG. 4, for example, the block 3a gradually moves away from the slab 1 while being synchronized with it. In order to provide a clearance corresponding to the width change amount S, in the case shown in FIG. 4, interference between the slab 1 and the blocks is prevented by giving the three blocks 3a the above degree of freedom. I can do it. The relationship between the number n of blocks 3a having degrees of freedom and the width change amount S is expressed by the following equation. (See Figure 5).

θ=nD/R...(1) S=(R+r)(1-cosθ)-D/2sinθ...
(2) Here, R is the radius of the orbit, r is the length from the roller 50 to the fulcrum, and D is the height of the block 3a.

In Figure 6, D=140mm, R=500mm, r=120mm
The relationship between the number n of blocks 3a and the width change amount S according to the above equations (1) and (2) when . From the figure, for example, when S=70 mm (if the width is to be changed by 70 mm), n≈2.2, that is, 3 blocks need to have the above degree of freedom.

8 to 10 show other embodiments of the present invention. Note that devices or members similar to those in the above embodiments are given the same reference numerals, and their explanations will be omitted.

In this embodiment, the means for connecting the block to the guide rail differs from the previous embodiment. That is, as shown in FIG. 8, the first group of blocks 3A
are inner guide rail 12 and outer guide rail 13
The second group of blocks 3B is attached only to the inner guide rail 12. As shown in FIGS. 9 and 10, the first group of blocks 3A are connected to the inner guide rail 12 via the first chain link 15 and to the outer guide rail 13 via the second chain link 16, respectively. ing. First chain link 15 and second chain link 1
6 is extendably connected. In order to connect both chain links 15 and 16 in an expandable and retractable manner, for example, one chain link is provided with an elongated hole extending in the direction of advancing and retracting the block, and the other chain link is provided with a pin. Both chain links 15 and 16 are connected by engaging the pin in the elongated hole. The second group of blocks 3B is connected to a chain link 18 attached only to the inner guide rail 12. The block 3C of the second group is supported by a chain link 21 having an elongated hole 22 as in the above embodiment.

Since this embodiment is configured as described above, the inner guide rail 12 or the outer guide rail 1
3, both chain links 15 and 16
will not interfere. Therefore, the inner guide rail 12 and the outer guide rail 13 can be freely moved forward and backward independently of each other and positioned.

In both of the above two embodiments, even when changing the width of the slab from wide to narrow, the block of the side dam device does not interfere with the slab, and the width of the slab can be changed freely during pouring. I can do it.

In the above embodiment, both guides on both sides are moved in the width direction of the slab to change the width of the slab, but it is also possible to move either one of them, and the degree of freedom can be changed. The block having a degree of freedom is not limited to the beginning of the boundary of the block group in the moving direction, but may also be a block having degrees of freedom in other parts.

[Effects of the Invention] As explained above, the present invention allows flexibility in the connection between the movable support part and the block when changing the width of the slab, so that the width can be changed from wide to narrow and vice versa. The direction can be changed freely, and efficient production is possible without restrictions on the casting schedule.

Further, in the present invention, the block is rotatably supported with respect to the movable support member, and the movable support member supporting the block has a sufficient gap in the direction of movement with respect to the endless guide rail, so that the block can be movably supported relative to the endless guide rail. connected. In this way, since the two movable parts are provided separately on the movable support member, the strength of the movable support member can be improved.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram schematically showing one embodiment of the present invention, Fig. 2 is a sectional view taken along line XX in Fig. 1, and Fig. 3 is a linking portion between the block and chain link at the boundary of the above embodiment. Figure 4 is an explanatory diagram of the case where the block and chain link at the boundary of the above embodiment move to the curved guide part, and Figure 5 shows the blocks in the curved guide part and the amount of slab width change. Figure 6 is a diagram showing the relationship between the number of blocks with degrees of freedom and the amount of width change, and Figure 7 is a diagram showing the relationship between the number of blocks with degrees of freedom and the amount of width change. Explanatory diagrams in the case of movement, FIGS. 8 to 10 show other embodiments of the present invention, FIG. 8 is a schematic diagram of the side dam, FIG. 9 is a side view of the curved part of the side dam,
and FIG. 10 is a longitudinal sectional view of the chain link. 1... Slab, 2... Side dam device, 2A, 2
B, 12, 13...Guide, 3...Block, 3
a, 3C...Block with degrees of freedom, 5, 6,
7, 15, 16, 18, 21... Chain link,
7, 7'...Electric cylinder, 9...Pin, 10,
22... Chain link long hole, 11... Pin, 2
0... Belt, 50, 60... Roll, 50', 6
0'... Guide groove, S... Amount of slab width change.

Claims (1)

[Claims] 1. A pair of belts arranged parallel to each other and rotating in opposite directions, a large number of blocks that are sandwiched between both ends of the belt and move in synchronization with the belt, and the blocks. It consists of a side dam consisting of chain links for support, and two sets of endless guide rails that move by guiding each chain link of the side dam, and both of the endless guide rails are moved in the width direction of the belt via the chain links. In a belt-type continuous casting machine, in which the width of the mold is changed by sequentially moving the blocks of the side dam approximately half a circumference in the width direction of the belt, at least half the circumference of the side dam among the blocks of the side dam is changed. Several blocks at the top of the downstream side in the moving direction from the boundary part are rotatably supported at the rear by pins 9 at the tips of chain links 8 and 21, and each chain link supporting the above blocks A connecting pin 11 is provided at each connecting portion between the
A belt-type continuous casting machine, characterized in that long holes 10 and 22 are provided in which the pins are loosely movable by a predetermined length in the direction of movement by the endless guide rail. 2 A pair of belts that are arranged parallel to each other and rotate in opposite directions, a large number of blocks that are sandwiched between both ends of the belt and move in synchronization with the belt, and chain links for supporting the belts. It consists of a side dam, two sets of endless guide rails that move by guiding each chain link of the same side dam, and a device that independently positions the two sets of guide rails. In a belt-type continuous casting machine, the width of the mold can be changed by sequentially moving blocks of the side dam approximately half a circumference in the width direction of the belt by sequentially moving the blocks of the side dam in the width direction of the belt. Among the blocks, at least the first few blocks on the downstream side in the moving direction from the boundary of the half circumference of the side dam have their rear parts rotatably attached to the tips of the chain links 8 and 21 with pins 9.
A connecting pin 1 is attached to each connecting portion of each chain link that supports the above-mentioned several blocks.
1, and elongated holes 10 and 2 that allow the same pin to move freely by a predetermined length in the direction of movement by the endless guide rail.
2 is provided, and further rotatable rollers are provided on both sides of the pin 11 for connection between the chain links, and the chain link is supported by the endless guide rail via the rollers,
A belt-type continuous casting machine characterized in that the two sets of endless guide rails are arranged independently in the width direction of the slab on the same plane.