JPH01130853A - Caterpillar type continuous casting machine - Google Patents

Abstract

PURPOSE:To facilitate maintenance and checking of a casting machine and to reduce restriction on the design by giving suitable curvature radius on a caterpillar shifting mold supporting wheels in the range excepting mold space forming part. CONSTITUTION:Side face shape of rail 21 for guiding the wheel 16 arranged at frame 20 for the casting machine is formed as straight line-state at passing part of block mold 1 forming the mold space 3 and as curving line-state having the suitable curvature radius R at the range excepting the mold space forming part. By this method, the block mold 1 is shifted as no contacting-state with molds 1 side by side at the range excepting the mold space 3 forming part. Therefore, variance of the pitch between the wheels 16 and frequency of variation are reduced and as the wears of journal box 19 and the wheels 16 are reduced, the maintenance and the checking are facilitated. As decision of the dimension at each part is easily executed, the restriction on the design is reduced.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an endless track type continuous casting machine.

[Prior Art] An example of a conventional endless track type continuous casting machine will be explained with reference to FIG. A tundish nozzle 5 protruding forward from the lower part of the tundish 4 is inserted into one opening of the mold space 3 formed together. In the figure, 6 is a drive roll, 7 is an idle roll, and 8
is a slab.

In such a continuous casting machine, the molten metal injected into the tundish nozzle 4 is transferred from the tundish nozzle 5 to the upper and lower molds 2 and 2, which are moved by a drive roll 6 and an idle roll 7.
The block mold 1 is supplied to the mold space 3 formed between
The cast slab 8 is cooled and solidified and taken out of the machine as a slab 8.

However, in the above continuous casting machine, the cooling zone is located in the mold 2.
Since only the return area of mold 2 is relatively short, the mold 2
Even when the block mold 1 returns, the block mold 1 has not been sufficiently cooled, and therefore, there is a possibility that casting cannot be performed.

Therefore, in recent years, the applicant of the present application has devised a continuous casting machine as shown in FIGS. 3 to 7 as an endless track type continuous casting machine that has a sufficient cooling zone.

That is, a mold 2 formed by connecting a large number of block molds 1 in an endless track shape is assembled vertically to form a mold space 3, and the mold space 3 has an inclined surface at the front and rear thereof as shown in FIG. Three relatively long cooling zones are provided: a cooling zone 9, a horizontal cooling zone 10 and a vertical cooling zone 11. Further, the mold 2 is rotated by a gear 12 attached to the drive device, and a brake can be applied to the mold 2 on the downstream side of the mold space 3 via a gear 13. The reason why the mold 2 is braked in this way is to prevent gaps from forming between the block molds 1.1 in the mold space 3 and leakage of molten metal.

As shown in FIGS. 4 to 6, the block mold 1 is fixed to carriers 14, and racks 15 are attached to both sides of each carrier 14, with which the gears 12 and 13 mesh. are each provided with two wheels 16 on one side.

One of the two wheels 16 on one side is pivotally supported on the carrier 14 via a shaft 17, and the other wheel 16 is attached to the carrier 1 so that it can slide in the direction of movement of the block mold 1.
It is pivotally supported by an axle box 19 fitted in a groove 18 of No. 4 via a hood 17.

An axle box 19 having the same structure as the axle box 19 described above is attached to the support 17 directly attached to the carrier 14.
The shaft 17 is fitted into the groove 18 of the front or rear carrier 14 adjacent to the carrier [4], and the shaft 17 attached to the carrier 14 via the shaft box 19 is fitted into the rear or front carrier 14 adjacent to the carrier 14. directly mounted,
The block molds 1 are connected by sequentially connecting the carriers 14 in this manner. Further, an endless track 21 is provided on the frame 2o, and the wheel 6 is fitted onto the track 21 so as to be freely movable. The endless track 21 is formed in a straight line except for each corner.

In addition, 22 in FIGS. 4 and 5 is an electric motor for driving the mold,
23 is a brake, and 24 is a side dam block which is inserted between the upper and lower block molds 1 and is movable in synchronization with the block molds 1.

During casting, the block mold 1 is driven by the electric motor 22 via the gear J2 and the rack [5], and the side dam block 24 is also driven in synchronization with the block mold 1.
Further, the brake 23 is applied via the gear 13 and the rack 15 so that no gap is created between adjacent block molds 1 in the mold space 3 forming part, and the work is performed. At this time, since the wheels 16 roll along the track 21, the mold 2 is smoothly driven.

The molten metal in the tundish nozzle 5 is transferred to the tundish nozzle 5.
It is then supplied to the mold space 3, cooled and solidified by the block mold 1, and taken out of the machine as a slab. While moving, the mold 2 is cooled by appropriate means in each cooling zone 9, 10.11, and then returned to the molten metal injection section.

In this way, the continuous casting machine shown in FIGS. 3 to 7 has relatively long cooling zones 9, 10, and 11, so that the block mold l
The molten metal is sufficiently cooled before returning to the molten metal injection section, so that casting is not affected by the same problem.

[Problems to be Solved by the Invention] However, in the case of the continuous casting machine shown in FIGS. 3 to 7, the block molds 1 that are adjacent to each other in the straight part and the curved corner part during one revolution of the mold The wheels come into contact with each other and move away from each other many times, so that the axle box 19 that supports the wheels 16 also slides repeatedly against the contact portion of the groove 18, and the pitch between the wheels 16 changes. Therefore, the axle box 19 and the wheels IIS wear out, and it is necessary to frequently replace or repair them. In addition, in the straight section, adjacent block molds 1 come into contact with each other, so it is necessary to determine the dimensions of each section in consideration of thermal effects, which is likely to be subject to design constraints.

The present invention has been made in view of the above-mentioned circumstances, and is intended to prevent the axle box from frequently sliding against the groove and to avoid design constraints.

[Means for Solving the Problems] The present invention connects a large number of block molds to form an endless track mold, and moves the endless track mold up and down so that opposing surfaces move in the same direction. In an endless track type continuous casting machine that is arranged to form a mold space, the endless track on which the wheels supporting each block mold move are provided with an appropriate radius of curvature except for the mold space forming portion.

[Function] The block mold moves in contact with the adjacent block molds in the mold space forming part, but moves apart from the adjacent molds in other parts, and the adjacent block molds do not come into contact or separate. In addition to reducing the frequency of damage to parts and preventing wear and tear on various parts, thermal effects are also reduced, which reduces design constraints.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of the present invention, and the side shape of the track 21 for guiding the wheels 16 provided on the frame 20 is as follows:
The appropriate portion of the block mold 1 that forms the mold space 3 (the lower surface of the upper mold 2 and the upper surface of the lower mold 2) is linear, but
The other portions are formed into a curved shape with an appropriate radius of curvature R. The structure is the same as that shown in FIGS. 3 to 7 except that the track 21 is provided with a curved portion having a radius of curvature R.

With the above configuration, the block molds 1 move without contacting each other except for the mold space 3 forming part, as shown in FIG.
The amount and frequency of pitch fluctuations between pitches 6 and 6 are reduced, and therefore the wear of the axle box 19 and wheels 16 is reduced. In addition, since there is no need to determine the dimensions of each part other than the mold space 3 forming part in consideration of thermal effects, design constraints are reduced.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] In the track type continuous casting machine of the present invention, the wear of the wheels provided on the block mold and the axle box that supports the wheels is reduced, making maintenance and inspection easier, and thermal effects are also reduced. , a reduction in design constraints, and various other excellent effects can be achieved.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of an embodiment of the endless track type continuous casting machine of the present invention, and Figure 2 is an explanatory diagram of an embodiment of the endless track type continuous casting machine of the present invention. An explanatory diagram of the state, Fig. 3 is an explanatory diagram of an example of an endless track type continuous casting machine that has solved the problems of the conventional one, Fig. 4 is a view taken from the IV-IV direction in Fig. 3, and Fig. 5 is a Fig. 6 is a detailed view of the block mold and carrier used in the endless track continuous casting machine shown in Fig. 3, and Fig. 7 is a schematic diagram of the arrangement of the block mold and carrier. FIG. 8 is an explanatory diagram of an example of a conventional endless track type continuous casting machine. In the figure, 1 is a block mold, 2 is a mold, 3 is a mold space, 4 is a tundish, 8 is a slab, 14 is a carrier, 15 is a rack, and 21 is an endless track. Figure 2

Claims (1)

[Claims] 1) An endless track type in which a number of block molds are connected to form a track-shaped mold, and the track-shaped molds are arranged one above the other so that their facing surfaces move in the same direction to form a mold space. 1. An endless track type continuous casting machine, characterized in that an endless track on which wheels supporting each block mold move has an appropriate radius of curvature except for the mold space forming part.