JP3263910B2 - Mold vibrator for curved continuous casting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration device for a mold mounted on a continuous casting facility.

[0002]

2. Description of the Related Art In a continuous casting facility, a mold is vibrated to make it easier to pull out a slab solidified in the mold. In the vibration device used here, the mold is supported by a link mechanism that forms a quadrangle, and the slab is shaped so that the mold motion trajectory is the same as the trajectory axis of the slab. There is a device arranged inside the orbital axis to vibrate.

[0003] This device has been widely used because of its relatively simple structure and low cost. However, in this device, the vibration trajectory becomes a pseudo arc trajectory,
When the curvature of the slab track axis is small, the geometric error increases, and since the vibration drive device is placed inside the track, the drive device, the vibration link and the lever are exposed to thermal effects. When the curvature is small, there is a problem that the installation space of the vibration device is restricted.

As means for solving the above problem, there is a technique disclosed in Japanese Patent Publication No. 52-5294 shown in FIG. This has a structure in which a square link mechanism 11 for supporting the mold 1 is arranged such that the trajectory of the mold movement is curved opposite to the trajectory axis of the slab.

[0005] The feature of this technique is that by disposing the vibrating device outside the slab track, it is possible to solve the problem that when the radius of curvature of the slab track is small, the installation space for the vibrating device is too small to fit inside the slab track. At the same time, the thermal effect on the vibration device and the link is reduced, and the device is easy to lean on the device to improve the maintainability.

As another conventional technique, there is a technique disclosed in Japanese Utility Model Laid-Open No. 1-105049 shown in FIG. This supports the vibration table by the parallel link mechanism 12,
The structure is such that the hydraulic actuators 5 are arranged below the support links, and these are incorporated in a replaceable stand 9.

The purpose of this device is to provide a vibrating device for improving the maintenance of exchanging the mold 1 and the vibrating device, and for preventing the vibration mechanism from rattling or bending.

[0008]

[Problems to be Solved by the Invention] By the way, the above-mentioned Japanese Patent Publication Sho 5
In the technique of 2-5294, the vibration trajectory is a pseudo-arc trajectory. In particular, in high-speed casting with a thin solidified shell in a mold, it is necessary to obtain a high-precision vibration trajectory, and there is a problem that the casting speed cannot be significantly increased due to distortion of the solidified shell caused by a pseudo arc trajectory. Was.

Although the main body of the apparatus is more compact than the conventional vibrating apparatus, the weight of the vibrating apparatus including the vibrating table is also heavy, so that the size of the vibrating drive unit becomes large, and the mounting of the vibrating apparatus is difficult. The equipment costs including the foundation were also large. Further, since the vibration device is fixedly installed on the ground, there is a problem that maintenance can be performed only when the line is stopped.

On the other hand, in the technique disclosed in Japanese Utility Model Laid-Open No. 1-105049, the supporting structure of the vibration table is also a parallel link mechanism, and the vibration trajectory has a problem of a pseudo arc trajectory.
There was a problem that the casting speed could not be increased significantly.

[0011] Further, by arranging the vibration driving device in a replaceable stand, it is possible to perform offline maintenance, and it is not necessary to install the vibration driving device around the main body. A vibration table that straddles the cylinders is provided, so that the vibration weight is greatly increased, and there is a limit to the compactness of the apparatus such as a vibration apparatus including the vibration table and a frame that supports them.

The present invention solves the above-mentioned problems, and provides a mold vibrating apparatus for a continuous casting machine, which can be made compact and can be maintained off-line.

[0013]

According to the present invention, there is provided a mold vibrating apparatus of a continuous casting facility having a curved slab track axis, wherein a mold and a cooling box are supported by a support arm on an exchangeable stand. The hydraulic actuator is directly oscillated by a hydraulic actuator through a joint that can be tilted and slid, and the steering guide attached to the outer periphery of the cooling box and the guide roller on the stand side are moved by the mold when the mold is vibrated. A mold vibrating device for a curved continuous casting machine, wherein the vibrating device is disposed at a position having the same curvature as an axis.

The present invention having the above configuration enables (1) high-speed casting with a high-precision vibration trajectory, and (2) a significant reduction in vibration weight and driving power by eliminating a vibration table. (3) This makes the vibration device including the mold compact, and (4) further arranges the vibration drive device in a replaceable stand .
This enables offline maintenance.

[0015]

The mold vibrating apparatus of the present invention is provided with a steering guide for vibrating the vibrating body at the same curvature as the slab track axis, a mold cooling box provided with a support arm for supporting the mold and the cooling box, and a support arm. Is directly driven by a hydraulic actuator through a joint that can be tilted and slid, so that the vibration trajectory of the mold center line can be performed along the same trajectory as the slab trajectory axis. It is possible to reduce the load applied to the solidified shell during casting and suppress the occurrence of breakout, which is a problem during high-speed casting.

In addition, by using two hydraulic cylinders capable of synchronization and directly driving the mold cooling box by the two cylinders via the joint, the mold vibration table is reduced and the weight of the vibrating body is reduced. However, it is possible to make the vibration device including the mold compact.

Furthermore, by arranging these in a stand where the mold vibrating device including the guide can be replaced, the maintainability of the vibrating device is improved, and there is no need to install a vibration driving device on the machine side. Leaning around the mold becomes easy.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a plan view of a mold vibrating apparatus of a curved billet continuous casting facility showing an embodiment of the present invention.
2 is a side view taken along the line AA in FIG. 1, and FIG.
FIG. 4 shows a side view in a section B-B, and FIG. 4 shows a front view.

In FIG. 1, FIG. 2, FIG. 3 and FIG.
Denotes a cooling box for the mold 1, into which a tubular mold 1 made of, for example, copper is incorporated and cooled. A support arm 3 is provided on the cooling box 2, and the support arm 3 is supported by a hydraulic actuator 5 through a tiltable and slidable joint 4 to perform vibration.

Here, the hydraulic actuator 5 is supported by a trunnion 6, and the vibrating body is separated from the slab track shaft 10 by a guide 7 for guiding the steering of the vibrating body and a guide roller 8 provided separately from the cooling box 2. It is possible to vibrate on the same vibration locus. These are set on a replaceable stand 9 so that the mold and the mold vibrating device can be replaced collectively. Note that r ₀ is a casting arc radius.

Here, by disposing the support arm 3 near the center of gravity of the vibrating body, the load applied to the guide roller 8 can be reduced, and the abrasion of the roller 8 and the steering guide 7 can be reduced. .

However, the height of the support arm 3 is
The height may be determined by the connection between the hydraulic actuator 5 and the hydraulic actuator 5. In the present invention, an electro-hydraulic stepping cylinder is used as the hydraulic actuator 5, and synchronization of the vibrations of the two right and left cylinders 5 is ensured.
This enables the elimination of the vibration table, but there is no particular problem as long as it is a drive device that can ensure left-right synchronization.

As can be seen from FIGS. 3 and 4, in this embodiment, the roller 8 is provided on the stand 9 and the steering guide 7 is provided.
Is provided in the cooling box 2. However, conversely, even if the guide 7 is attached to the stand and the roller 8 is attached to the cooling box 2,
There is no particular problem in obtaining the same vibration trajectory as the casting arc.

Although the guide roller 8 in the drawing has a fastening structure with bolts, a buffer mechanism is provided on one side of the pair of guide rollers 8 as occasion demands, and the cooling box is always pressed to one side while the cooling box 2 is pressed. A structure capable of absorbing the expansion allowance in the case of thermal expansion may be adopted. It does not matter whether the cushioning mechanism is a coil spring or a leaf spring.

It should be noted that the present invention is not limited to the above-described embodiment, and it is a matter of course that various changes such as various shapes of each constituent member can be made without departing from the gist of the present invention.

In the mold vibrating apparatus constructed as described above, for example, in a billet continuous casting facility, it is possible to achieve a casting speed of up to 4.0 m / min, and to reduce the vibrating body weight by reducing the number of vibration tables. As a reduction effect, the capacity of the vibration drive device is reduced to approximately 6
The mold and the vibration device can be reduced to about half the size of the conventional one and the mold can be reduced to about 70%.

[0028]

As described above, the mold vibration device of the present invention can perform mold vibration along the same trajectory as the slab trajectory axis, and can improve the casting speed. By reducing the weight of the vibrating body by omitting the above, the capability of the vibration driving device can be suppressed to about 60 to 70% of the conventional one, and the load on the vibration guide is reduced.
Therefore, wear of the steering guide can be reduced, and a highly reliable vibration device can be provided.

As described above, the entire structure of the mold and the vibrating device can be compactly reduced to about half of the conventional structure, and the degree of freedom in layout, such as the approach to the continuous casting equipment around the mold, is greatly improved. Not only that, but also the load on the machine frame has been reduced, and the removal of the foundation dedicated to the vibration device has enabled a significant reduction in equipment costs.

[Brief description of the drawings]

FIG. 1 is a plan view showing a mold vibrating device of a curved billet continuous casting facility according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the mold vibration device shown in FIG. 1 at a position AA.

FIG. 3 is a side sectional view of the mold vibration device shown in FIG. 1 at a position BB.

FIG. 4 is a front view of the mold vibration device shown in FIG.

FIG. 5 shows a conventional example of a mold vibrating device, and is a schematic side view of a vibrating device for supporting and vibrating a mold by a square link mechanism.

FIG. 6 is a schematic side view of another conventional example of a mold vibrating device, in which an actuator is arranged below a parallel link mechanism and incorporated into a replaceable stand.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Mold 2 Cooling box 3 Support arm 4 Joint 5 Hydraulic actuator 6 Trunnion 7 Steering guide 8 Guide roller 9 Stand 10 Slab track axis 11 Square link mechanism 12 Parallel link mechanism r ₀ Casting arc radius

Continuation of the front page (56) References JP-A-60-118353 (JP, A) JP-A-1-105049 (JP, U) JP-A-50-78709 (JP, U) JP-A-60-38644 (JP , U) JP 48-17131 (JP, B1) JP 52-5294 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22D 11/053 B22D 11/043 B22D 11/16 105

Claims (1)

(57) [Claims] In a mold vibrating apparatus of a continuous casting facility having a curved slab track axis, a mold and a cooling box are supported on a replaceable stand by a support arm, and the support arm is tiltable and slidable. The vibration guide is configured to be directly oscillated by a hydraulic actuator, and the steering guide attached to the outer periphery of the cooling box and the guide roller on the stand side are set so that the mold has the same curvature as the slab track axis during vibration. A mold vibrating device for a curved-type continuous casting machine, which is disposed at a position.