JPH05237607A - Side guide device for dummy bar - Google Patents

Abstract

PURPOSE:To prevent meandering of a dummy bar in continuous casting apparatus by providing a side guide device. CONSTITUTION:Plural numbers of the side guide devices of the dummy bar are arranged at the prescribed interval on a dummy bar reciprocating route of continuous casting apparatus. The side guides comprise of a pair of the guide rolls 46a, 46b, which are supported as rotatable at the supporting shafts 45a, 45b being vertical to the dummy bar running direction, and a driving device of the hydraulic cylinders 47a, 47b, etc., for moving horizontally the guide roll so as to abut with a side of the dummy bar.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side guide device for a dummy bar in a continuous casting device.

[0002]

2. Description of the Related Art When a steel material is cast by a continuous casting apparatus, a dummy bar is inserted from the lower part of a water-cooled mold before starting casting, and then molten steel is supplied from a ladle to a dan dish and then to a water-cooled mold. The molten steel supplied to the water-cooled mold is
It is pulled out from the lower part of the water-cooled mold by a dummy bar, and is pulled out downward while solidifying in the segment for cooling. By the way, in a continuous casting device having a curved dummy bar reciprocating path, when the dummy bar is inserted in the lower part of the water-cooled mold, the pinch roll is driven to insert the dummy bar along the reciprocating path, and the tip thereof is the water-cooled mold. Is pressed to close the opening at the bottom of the.

[0003]

However, the continuous casting apparatus having the curved dummy bar reciprocating path as described above has the following problems when the dummy bar is inserted and the molten steel is pulled out from the mold. It was That is, in the conventional continuous casting apparatus, in order to allow the casting of various sizes by exchanging the water-cooled mold and the dummy bar, allowance is given to the width of the segments and the conveying rolls provided in the dummy bar reciprocating path. .. for that reason,
When a horizontally stored dummy bar is raised along a curved dummy bar reciprocating path, the tip of the dummy bar swings in the width direction of the transport roll, and the dummy bar meanders. As a result, there is a problem in that the dummy bar comes into contact with various members arranged in the reciprocating path to cause scratches, or the dummy bar cannot be smoothly inserted into the lower opening of the water-cooled mold. Further, the slab that is pulled out from the lower opening of the water-cooled mold, pulled out downward by the dummy bar, and taken out also meanders in the dummy bar reciprocating path, and as a result, the slab surface is various members arranged in the reciprocating path. There is also a problem that the surface of the slab is scratched by the contact. The present invention has been made for the purpose of solving the above-mentioned problems related to the meandering of the dummy bar in the conventional technique. That is, it is an object of the present invention to provide a dummy bar side guide device for preventing the meandering of a dummy bar and the meandering of a cast piece pulled out by the dummy bar in a continuous casting device.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a dummy bar side guide device in which a plurality of dummy bar reciprocating paths are provided at a predetermined interval in a reciprocating path of a dummy bar in a continuous casting apparatus, and the side guide device with respect to the moving direction of the dummy bar. And a pair of guide rolls rotatably supported by a vertical support shaft, and a drive device for moving the guide rolls in the horizontal direction so as to abut the side surface of the dummy bar.

[0005]

The operation of the dummy bar side guide device of the present invention will be described with reference to FIGS. 1 and 2 when the curved dummy bar reciprocating path is provided. FIG. 1 is a schematic configuration diagram of a continuous casting device to which the present invention is applied, and FIG. 2 is a partially enlarged view thereof, in which two dummy bar side guide devices 41a and 41b are of a curved type. The dummy bar 21 in the reciprocating path of the dummy bar is arranged at a position where it starts to bend upward. The dummy bar pulled out from the dummy bar storage 10 moves up and down the curved dummy bar reciprocating path by driving the pinch rolls. In that case, both side surfaces of the dummy bar are sandwiched by the pair of guide rolls of the side guide device. It will proceed in a state of being. Since the two side guide devices are arranged at a predetermined interval, the position of the dummy bar is regulated between these two side guide devices, and the center line of the dummy bar is maintained so as not to shift. Therefore, the tip of the dummy bar does not deviate from the center line and swings left and right, and the meandering of the dummy bar is prevented. In addition, since the guide roll is provided so as to be movable in the horizontal direction so as to correspond to the size of the dummy bar, even when using a dummy bar in which the tip end portion of the dummy bar is changed to a different size, the guide roll is not required. By moving according to the change in size and making contact with the dummy bar,
It is possible to accurately control the position of the dummy bar

[0006]

Embodiments of the present invention will be described below with reference to FIGS. 2 is an enlarged side view of the main part of FIG. 1, FIG. 3 is a plan view of the side guide device of the present invention, FIG. 4 is a side view of FIG. 3, and FIG. It is sectional drawing of the principal part of a side guide apparatus.

In FIG. 1, the continuous casting apparatus 1 includes a pedestal 2
The ladle 3 provided above, the tundish 4 to which the molten steel is supplied from the ladle 3, the cooling mold 5 provided below the ladle 3, and the molten steel drawn from the cooling mold 5 located below the cooling mold 5 Segments 6a, 6b, 6c forming a secondary cooling chamber for cooling and solidifying, and further segments 6a-
6c, a guide portion 7 forming a curved reciprocating path of the dummy bar 21, a pinch roll 8, a cutter 9 for cutting a cast piece into a predetermined length, a storage portion 10 for storing the dummy bar, and the like. The guide portion 7 is provided with the side guide devices 41a and 41b of the present invention at a predetermined interval.

When casting is performed by the above continuous casting apparatus, the pinch roll 8 is driven to drive the dummy bar 21.
Is inserted from the guide portion into the segments 6a to 6c, and its tip is inserted above the segment 6a so as to close the lower opening of the cooling mold 5. Next, molten steel is poured into the cooling mold, and the pinch roll 8 is used to move the dummy bar 21.
The solidified molten steel is pulled out by pulling downward. The molten steel passes through the segments 6a to 6c while being supported by the dummy bar 21, and is gradually cooled and solidified by the cooling water. The formed slab is cut into a predetermined length by the cutter 9 and conveyed by an appropriate means. The dummy bar 21 is held in the storage unit 10 in a state of being separated into a plurality of pieces.

Next, the guide portion 7 in which the side guide device of the present invention is arranged will be described. The guide portion 7 is provided at a position where the bending of the curved dummy bar reciprocating path starts, and a plurality of reaction rolls 31a, 31b for sandwiching and guiding the dummy bar 21 in the vertical direction of FIG.
31c, and side guide devices 41a, 41 of the present invention
b, and further includes support rolls 51a and 51b. The reaction rolls 31a to 31c are
A fixed roll 33 is provided in the lower part of the housing 32, and a roll 34 pressed downward by a cylinder 35 is provided in the upper part.

Next, the side guide device 41a of the present invention,
41b will be described with reference to FIGS. The side guide devices 41a and 41b have the same structure, and each of the side guide devices 41a and 41b slidably reciprocates along the upper surface of the base 42, and the shaft support plates 44a, 4b.
A pair of guide rolls 46a, 46b is rotatably attached to support shafts 45a, 45b provided between the four rolls 4b, and a hydraulic cylinder for moving the guide rolls horizontally so as to abut the side surface of the dummy bar. 47
a and 47b are provided. Each hydraulic cylinder 47
One end of each of a and 47b is a fixture 48 fixed to the base 42.
a and 48b, and the other end is a shaft support plate 44a.
And 44b. According to the side guide device having the above configuration, by operating the hydraulic cylinder, the guide rolls 46a and 46b are moved toward both side faces of the dummy bar 21 being conveyed, and each guide roll is brought into contact with both side faces of the dummy bar. I will come into contact with you. Since the two side guide devices having the above structure are provided at a predetermined interval, the position of the dummy bar is regulated between them, the center line of the dummy bar is maintained so as not to shift, and the meandering of the dummy bar is performed. Is blocked.

Further, in the side guide device having the above structure, the distance between the guide rolls 46a and 46b can be freely adjusted by the hydraulic cylinders 47a and 47b. Therefore, in the case where the tip end portion of the dummy bar 21 is replaced with one having a size different from the illustrated width size, the hydraulic cylinders 47a and 47b are driven and the guide rolls 46a and 46b are adjusted so as to match the width size. It may be abutted on both side surfaces of.

In the above embodiment, the side guide device is applied to the continuous casting device having the curved dummy bar reciprocating path, but it may be applied to the vertical type and other continuous casting devices. In addition, in the above embodiment, the two side guide devices are the dummy bars 2.
Although it is provided along one conveyance path, it is also possible to provide three or more. In addition, the guide rolls 46a, 46
The means for driving b is not limited to the hydraulic cylinder, but may be a ball screw or the like.

[0013]

As described above, according to the present invention, the dummy bar of the continuous casting apparatus can be reciprocally moved at a predetermined interval from both side surfaces of the dummy bar facing each other to meet the shape, size and the like. Since a plurality of side guide devices sandwiching and contacting each other are provided, the dummy bar does not meander when it is inserted into the lower opening of the cooling mold. Therefore, the tip of the dummy bar can be smoothly inserted into the lower opening of the water-cooled mold without the dummy bar coming into contact with various members arranged in the reciprocating path. Further, the slab that is pulled downward from the lower opening of the water-cooled mold by the dummy bar does not meander in the dummy bar reciprocating path, so the surface of the dummy bar is damaged by contact with various members arranged in the reciprocating path. Not even. Therefore, it is possible to produce a slab having a good surface property.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a continuous casting device provided with a side guide device of the present invention.

FIG. 2 is an enlarged side view of a guide portion of the continuous casting device of FIG.

FIG. 3 is a plan view of a side guide device of the present invention.

FIG. 4 is a side view of a side guide device of the present invention.

FIG. 5 is a cross-sectional view showing attachment of a guide roll of the side guide device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Continuous casting apparatus 3 Ladle 5 Cooling mold 6a-6c Segment 7 Guide part 21 Dummy bar 41a, 41b Guide member 45a, 45b Support shaft 46a, 46b Guide roll 47a, 47b Hydraulic cylinder

Claims (1)

[Claims] 1. A side guide device for a dummy bar, comprising a plurality of dummy bar reciprocating paths arranged at a predetermined interval in a reciprocating path of the dummy bar in a continuous casting device, the device being rotatably supported by a spindle perpendicular to the direction of travel of the dummy bar. A side guide device for a dummy bar, comprising: a pair of guide rolls formed as described above; and a drive device for horizontally moving the guide roll so as to contact the side surface of the dummy bar.