JPS6240103B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary mold apparatus for continuous casting, and more particularly to a rotary mold apparatus for continuous casting suitable for facilitating the replacement of casting wheels.

In general, in continuous casting machines, in which a rotary mold is constructed by a combination of a belt and a casting wheel, the belt and casting wheel directly hold the molten metal while cooling it and casting slabs. However, since the area that is held and cooled is only a portion of the entire circumference, thermal stress occurs locally, and due to repeated fatigue, the product often deforms in a short period of time and becomes unusable, increasing running costs. , is the main cause of lower operating rates due to increased replacement frequency.

Conventionally, as shown in FIG. 1, the method for replacing the cast wheel is to suspend the cast wheel 2 with a crane 1, move the cast wheel 2 horizontally relative to the fixed drive shaft 3, and insert the cast wheel 2.・How to perform extraction and exchange,
Alternatively, as shown in Fig. 2, a method is adopted in which the casting wheel 2 is suspended by a crane 1, the fixed side drive shaft 3 is moved horizontally with respect to the casting wheel 2, and the casting wheel 2 is inserted/extracted and replaced. ing.

However, in this type of method, the cast wheel boss 4
It is necessary to make a large diameter difference between the hole diameter and the outer diameter of the rotating side drive shaft 3 to facilitate the fitting operation, but it is also necessary to supply and drain cooling water from the drive shaft 3 to the cast wheel boss 4. Therefore, there is a limit to the fit in order to achieve a complete seal during water supply and drainage. Additionally, since the key is used to transmit rotational power from the drive shaft to the cast wheel, due to the seal problem mentioned above, the key installation position must avoid the seal area, which inevitably increases the width of the cast wheel boss. The amount of horizontal movement during replacement will be approximately 700mm.

Therefore, the former replacement method has the disadvantage that the floor around the casting wheel must be removed to secure sufficient space when replacing the casting wheel, and the latter replacement method has the disadvantage that the horizontal movement of the drive shaft is limited. 700mm
As the above is required, the drive shaft horizontal movement device becomes larger, the amount of cantilever overhang of the drive shaft becomes larger, and the shaft diameter must also be increased due to problems with drive shaft strength, resulting in a larger overall size. There are disadvantages such as unavoidable increase in equipment costs.

The purpose of the present invention is to ensure the sealing of the cooling water flowing between the casting wheel and the rotating shaft, and to reduce the amount of rotational shaft movement when replacing the casting wheel, thereby reducing the size of the equipment. An object of the present invention is to provide a rotary mold device for continuous casting in which rings can be easily replaced.

In order to achieve the above object, the present invention is characterized by a rotary mold comprising a casting wheel in which cooling grooves for cooling molten metal are formed, and a belt in contact with the outer peripheral surface of the casting wheel. and a rotary shaft for supporting the rotary mold and having a flow path for supplying and draining cooling water. The drive shaft is divided into a drive shaft having a passage, and a driven shaft rotated by the drive shaft and having a flow passage for supplying and discharging cooling water inside. a drive device that transmits a driving force to the drive shaft, and a moving device that moves the driven shaft in the axial direction; Tooth clutches are installed at each end of the shaft and driven shaft to enable the cast wheel, drive shaft, and driven shaft to rotate together, and tooth clutches are provided on both sides of the cast wheel that communicate with the cooling groove and into the opening. In addition to providing a tapered hole that widens towards the end, a tapered portion that matches the tapered hole is provided at each end of the drive shaft and the driven shaft, and cooling is carried out through a cooling water supply and drainage channel formed in the shaft. Water can flow through the cooling groove of the casting wheel, and sealing gaskets are provided on the tapered portions of the drive shaft and driven shaft.

The present invention will be explained below based on an embodiment shown in FIGS. 3 and 4.

The body 12 of the cast wheel 1 is generally made of pure copper;
It is assembled into the casting wheel boss 13 and used for casting. A cooling groove 1 is provided in the casting wheel 11 to cool the molten metal.
4 is provided, and water supply and drainage are performed via piping 30.

Holes are provided in the center of the cast wheel boss 13 from both sides for insertion of the drive shaft and connection of water supply and drainage, and a partition wall 15 is formed between the holes. And, at the outer edge of the opening end of the hole,
As shown in FIG. 3, tooth clutches 18 are provided for transmitting rotational power from the drive shaft 16 and to the driven shaft 7, and cast wheel bosses are provided at the shaft ends of the drive shaft 16 and the driven shaft 17. 13, the same taper 19 is formed at the hole end and the shaft end, respectively, so that the casting ring 11 can be automatically centered.
The driven shaft 7 is supported by a bearing 20 and rotated by a tooth clutch 18.

A sealing gasket groove 21 is provided on the tapered shaft end surfaces of the drive shaft 16 and the driven shaft 7, and the gasket 22 inserted into this gasket groove 21 allows
The sealing of the cooling water can be performed simultaneously with the installation of the casting wheel boss 13. Also, both shafts 1
As shown in FIG. 3, holes 23 for supplying and discharging cooling water are provided at the shaft center positions of the shafts 6 and 17, respectively, and rotary joints 24 that communicate with the holes 23 are provided at the shaft ends of both shafts 16 and 17. are respectively attached and connected to external piping.

The driven shaft 7 is attached to a frame 25 along with a bearing 20 and the like.
It is housed in and is configured to be horizontally movable in the axial direction by a moving device 26 composed of a power actuator or the like.

On the other hand, the drive shaft 16 has a bearing 2 as shown in FIG.
0, and the electric motor 28 is supported via the speed reduction device 27.
It is configured to be rotationally driven by.

In addition, in FIG. 4, 29 is a crane.

In the above configuration, the main body 12 and the cast wheel boss 1
When replacing the casting wheel 11 consisting of 3 and 3,
First, after supporting the casting wheel with the crane 29,
The driven shaft 17 is moved back about 200 mm by the moving device 26 and completely pulled out from the end face of the cast wheel boss 13.

Next, the crane 29 is moved horizontally in the direction of the driven shaft 17 so that the end surface of the cast wheel boss 13 completely comes out from the end of the drive shaft 16. Then, the casting wheel 11 is lifted up by a crane 29.

When assembling the casting wheel 11, the operations described above are reversed.

As explained above, according to this embodiment, the amount of horizontal movement of the casting wheel when replacing the casting wheel is 700mm compared to the conventional one.
Since the casting wheel boss and shaft are assembled on a tapered surface, it is easy to separate and assemble the casting wheel when horizontally moving it, and the time for replacing the casting wheel is greatly reduced. can be expected.

Furthermore, since the partition wall of the water supply and drainage chamber is provided at the center of the inner diameter of the cast ring boss 13, it is possible to completely separate the two chambers in place of the conventional packing seal, and a packing is provided at the tapered portion. Therefore, sealing of water supply and drainage can be achieved at the same time by the combined operation of the casting wheel on both shafts. Further, by providing the seal gasket on the end face of the boss, gasket maintenance and water leakage confirmation are facilitated, and reliability can be improved.

The present invention has been described above based on preferred embodiments. According to the present invention, the sealing of the cooling water flowing between the casting wheel and the rotating shaft for rotating the casting wheel is ensured, and the casting wheel is When replacing the casting wheel, the amount of axial movement of the rotary shaft can be reduced, thereby reducing the size of the equipment and facilitating the work of replacing the casting wheel.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams showing the conventional method for replacing the casting wheel, Figure 3 is a sectional view showing an embodiment of the present invention, and Figure 4 is the replacement of the casting wheel shown in Figure 3. It is an explanatory diagram showing a method. 11... Casting wheel, 15... Partition wall, 16... Drive shaft,
17... Driven shaft, 18... Tooth clutch, 19... Taper, 22... Packing, 26... Moving device.

Claims (1)

[Claims] 1 A rotary mold consisting of a casting wheel with cooling grooves formed inside for cooling the molten metal, a belt in contact with the outer peripheral surface of the casting wheel, and a rotating mold that supports the rotary mold and has a cooling water supply and drainage flow. In a continuous casting rotary mold apparatus, the rotary molding apparatus for continuous casting is equipped with a rotating shaft having a passage, and a drive shaft that transmits rotational force as the rotating shaft and has a flow passage for supplying and draining cooling water inside; The driven shaft is divided into a driven shaft and a driven shaft having an internal flow path for supplying and discharging cooling water, and these shafts are respectively disposed on both sides along the axis of the cast wheel to transmit driving force to the drive shaft. a drive device;
A moving device for moving the driven shaft in the axial direction is provided, and tooth clutches are installed on both sides of the cast wheel and at each end of the drive shaft and driven shaft corresponding to these both sides, respectively. A drive shaft and a driven shaft are rotatable together, and a tapered hole is provided on both sides of the casting wheel that communicates with the cooling groove and widens toward the opening, and a tapered hole that matches the tapered hole. A tapered portion is provided at each end of the drive shaft and the driven shaft to allow cooling water to flow into the cooling groove of the casting wheel through a cooling water supply and drainage channel formed in the shaft, and A rotary molding device for continuous casting, characterized in that a sealing gasket is provided on the tapered portion of the shaft.