JP2001038455A - Continuous casting roll rotation detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an automatic detection of the rotation quality possible even against a continuous casting roll whose spacing is gradually getting narrower from the upper stream, while constitution can be made compact. SOLUTION: This continuous casting roll rotation detecting device is equipped with a roll rotation driving element 20, which moves in a casting metal passage while friction contacting with each of continuous casting rolls such as guide rolls for constituting the casting metal passage, compression coil springs 22 for enerdizing the driving element 20, which moves in the casting metal passage, in the continuous casting rolls directions, and generating a thrusting force for rotating the continuous casting rolls, detection rolls 24 being rotatably held to the driving element 20 for contacting with each continuous casting roll, and a rotation detection means for detecting the rotation of the rotation roll 24 being accompanied by the movement of the driving element 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the rotation of a continuous casting roll, and more particularly to an apparatus for detecting the state of rotation of a continuous casting roll provided in a continuous casting machine before starting continuous casting. The present invention relates to a preferred continuous casting roll rotation detecting device.

[0002]

2. Description of the Related Art In a continuous casting machine, molten steel is injected into a mold,
The cast slab is continuously manufactured while being drawn by a group of a large number of guide rolls, pinch rolls, and the like (hereinafter, also referred to as continuous cast rolls) provided on the outlet side of the cast slab formed by cooling. I have.

In this continuous casting machine, while the slab is guided and guided by a number of continuous casting rolls in a slab passage formed by these rolls, if there is a roll having poor rotation, Since the surface of the slab is flawed and causes a defect in the product, it is very important to control the rotation of these rolls.

However, since the slab passage is narrow and the number of rolls is enormous, it is extremely difficult to manage by manual power. Therefore, conventionally, as an apparatus for automatically performing the rotation inspection of a large number of rolls, for example, JP-B-56-143.
83 and a roll rotation detecting device as disclosed in JP-A-4-15510 have been proposed.

[0005] The former detection device comprises a roll rotation driving body capable of moving within the slab path while being brought into frictional contact with substantially the same pressing force as each roll of the slab path, and rotatably held by the driving body. It has a plurality of detection rolls in contact with the rolls, and the rotation of the rolls in the slab passage is checked from the respective rotation states of the detection rolls as the driving body moves. In this apparatus, the driving body is formed of a urethane rubber layer in order to make frictional contact with the roll with substantially equal pressing force.

On the other hand, the latter detection device detects the rotation of the roll by the frictional force between the roll and the detection head by the detection head which is urged in the direction of the roll and comes into contact with the outer periphery of the roll.

[0007]

However, the gap (gap) between the continuous casting rolls arranged oppositely decreases from the upstream side to the downstream side of the continuous casting machine in accordance with the solidification shrinkage of the slab. The above mentioned Japanese Patent Publication No. 56-1438
In the apparatus disclosed in No. 3, when the roll rotation driving body is brought into contact with the continuous casting rolls in the entire flow direction with the same pressing force, the urethane rubber layer becomes thick, and the entire apparatus is made compact. However, it has not been put to practical use at present.

In the apparatus disclosed in Japanese Patent Application Laid-Open No. 4-15510, the frictional force of the roll changes greatly due to the effect of grease and scale for each casting. Is very difficult, etc., and has not been put to practical use.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has a compact structure.
The continuous rotation of the continuous casting rolls is automatically detected easily and reliably because the roll rotation drive can be contacted with the same pressing force even for the continuous casting rolls whose interval decreases from upstream to downstream. An object of the present invention is to provide a continuous casting roll rotation detecting device that can perform the rotation.

[0010]

According to the present invention, there is provided a continuous casting roll rotation detecting device, comprising: a roll rotation driving body which moves in a continuous casting roll constituting a slab passage while making frictional contact with the casting roll; An urging means for urging the roll rotation driving body moving in the one-way passage in the direction of the continuous casting roll to generate a pressing force for rotating the continuous casting roll, and rotatably held by the roll rotation driving body. The problem has been solved by providing a detection roll that comes into contact with each of the continuous casting rolls, and a rotation detection unit that detects the rotation of the detection roll accompanying the movement of the roll rotation driving body. is there.

That is, in the present invention, the roll rotation driving body moving in the slab passage is urged in a direction orthogonal to the moving direction to contact the continuous casting roll, and the continuous casting roll is rotated. Since the urging means for generating the necessary pressing force (pressing force) is provided, each continuous casting roll contacting the driving body can be surely rotated, and the apparatus configuration can be made compact, and The rotation state of the continuous casting roll can be detected online.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic view schematically showing a continuous casting machine to which a continuous casting roll rotation detecting device according to an embodiment of the present invention is applied, and FIG. 2 uses a schematic configuration of the detecting device according to the present embodiment. FIG. 3 is a schematic front view showing the detection device together with a state, and FIG.

In the continuous casting machine, molten steel stored in a tundish (not shown) is injected into a mold 10,
When the area near the surface is cooled and solidified, it becomes the guide roll 1
2. The slab S is continuously manufactured by being pulled out through the slab passage 16 formed by a roll group of the continuous casting rolls including the pinch rolls 14. In addition, the pinch roll 14 partially shown by a black circle
Are arranged in pairs for each segment including a plurality of guide rolls 12 indicated by white circles. In addition, the code | symbol G in a figure is the space | interval between continuous casting rolls.

The continuous casting roll rotation detecting device according to the present embodiment comprises:
After being inserted from above the mold 10 before the start of casting, the guide roll 12
The rotation of the continuous casting roll composed of the pinch roll 14 and the pinch roll 14 is detected. As shown in FIGS. 2 and 3, the detecting device is a roll that moves in the slab passage 16 while making frictional contact with each of the continuous casting rolls 12 and 14 that are arranged facing each other. The rotary drive body 20 and the roll rotary drive body 20 moving in the slab passage 16 are urged in the direction of the continuous casting rolls 12 and 14 to generate a predetermined pressing force. Compression springs (biasing means) 22 for rotating the rotation rollers 14 and 14, and the roll rotation driving body 20
A detection roll 24 rotatably held in contact with each of the continuous casting rolls 12 and 14;
And a rotary encoder (rotation detecting means) 26 for detecting the rotation of the detection roll 24 accompanying the movement of.

The detection device will be described in detail. The roll rotation driving body 20 is composed of two plate members made of opposed stainless steel plates and the like, one end of which is rotatably fixed to a rotation shaft 20A. The compression coil spring 22
Are locked so as to urge the two plate members outward, respectively. As a result, the driving body 20 is connected to the slab passage 16.
By moving the continuous casting rolls 12 and 14 in the passage while frictionally contacting them with a substantially equal pressing force, the torques required for rotating the continuous casting rolls 12 and 14 can be generated. It functions to forcibly rotate the casting rolls 12 and 14.

Further, the roll rotation driving body 20 composed of the two plate members is provided with the detection roll 24 which is rotatably held and comes into contact with the rolls 12, 14, respectively. As shown in the partial side view of FIG. 3A, the detection roll 24 has one end pivotally supported by a tip end of an arm 28 rotatably supported on the inner wall of the driving body 20, and an intermediate portion thereof. A constant pressing force is applied to the continuous casting rolls 12 and 14 by the spring 30 mounted at the position, and the rotation of the roll 24 is shown in the schematic front view of FIG. Thus, the rotation is detected by the rotary encoder 26 connected to the rotation shaft 24A. Accordingly, the detection device can be made compact, and the roll driving body can be brought into contact with the continuous casting rolls 12 and 14 in which the gap G decreases from the upstream to the downstream of the slab path with the same pressing force. Therefore, the quality of rotation of the continuous casting roll can be automatically detected easily and reliably.

Next, the operation of the present embodiment will be described with reference to FIGS.

In this embodiment, the detection device is inserted from above the mold 10 by the continuous casting machine shown in FIG.
By moving in the direction of the arrow as shown in FIG. 2,
The rotation of the continuous casting rolls 12, 14 is inspected from the rotation state of each detection roll 24 accompanying the movement of the driving body 20.

That is, in the order shown in FIGS.
When the roll rotation driving body 20 moves in the thin arrow direction while contacting the continuous casting rolls 12 and 14, the continuous casting roll rotates in the arrow direction. Will move.

However, when the detection roll 24 rotatably attached to the roll rotation driving body 20 rotates by contacting the continuous casting roll with the movement of the driving body 20, the rotation direction is the same. Because it is in the opposite direction to the continuous casting roll, when the continuous casting roll is in a normal state of rotation,
The detection roll 24 hardly rotates, ie the point y on the roll does not change much.

On the other hand, when the continuous casting roll is in an abnormal state in which it does not rotate, FIGS.
Since the continuous casting roll does not rotate, the detection roll 24 rotates by the length in contact with the continuous casting roll, that is, the position of the point y greatly changes.

Therefore, according to this embodiment, whether or not the continuous casting roll rotates can be accurately detected based on the amount of rotation when the detection roll 24 comes into contact with the continuous casting roll.

FIG. 6 shows the result of measuring the presence or absence of rotation of the continuous casting roll by using the continuous casting roll rotation detecting device of the present embodiment (roll 27 and subsequent rolls are omitted). In this measurement, in order to confirm the effect of the present embodiment, the 8th roll and the 22nd roll were used.
Roll No. is deliberately out of rotation. As shown in FIG. 6, although the pulse count is almost zero for most of the rolls, a large pulse count is generated only for the two corresponding rolls. It can be seen that the non-rotation state can be confirmed.

Further, in the detecting device of the present embodiment, it is necessary to apply a pressing force necessary for rotating the continuous casting roll to the roll rotation driving body 20 by the compression coil spring 22. The pressing force of the driver measures the torque required to rotate each continuous casting roll in advance,
This can be realized by employing the compression coil spring 22 having a pressing force (biasing force) necessary to output a torque equal to or greater than the maximum torque. By doing so, the pressing mechanism can be simplified, so that the apparatus body can be made compact and inexpensive.

According to the present embodiment, as described above, since the detection device can be made compact, a method for detecting the presence or absence of rotation of the roll by passing the device alone through the slab passage, and a dummy bar It can be measured by any of the methods of detecting the presence or absence of rotation of the roll by attaching to a (not shown).

Although the present invention has been specifically described above, the present invention is not limited to the above-described embodiment, and can be variously modified without departing from the gist thereof.

For example, the specific configuration of the continuous casting roll rotation detecting device is not limited to the one described in the above embodiment.

[0029]

As described above, according to the present invention,
In addition to being able to have a compact device configuration, the roll rotation driving body can be brought into contact with the same pressing force even with continuous casting rolls whose interval narrows from upstream to downstream of the slab path, so In addition, the quality of rotation of the continuous casting roll can be automatically detected reliably.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an outline of a continuous casting machine.

FIG. 2 is a schematic side view showing a continuous casting roll rotation detecting device according to an embodiment of the present invention.

FIG. 3 is an enlarged side view and a front view showing a main part of the detection device.

FIG. 4 is an explanatory diagram showing a rotation state of a detection roll when a continuous casting roll rotates.

FIG. 5 is an explanatory diagram showing a rotation state of a detection roll when the continuous casting roll does not rotate.

FIG. 6 is a diagram showing the effect of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Mold 12 ... Guide roll 14 ... Pinch roll 16 ... Slab passage 20 ... Roll rotation drive 22 ... Compression coil spring 24 ... Detection roll 26 ... Rotary encoder 28 ... Arm 30 ... Spring

Claims (2)

[Claims] 1. A roll rotation driving body that moves in a continuous path while frictionally contacting each continuous casting roll that forms a slab path, and a roll rotation driving body that moves in the slab path is formed of the continuous casting roll. Urging means for urging in the direction to generate a pressing force to rotate the continuous casting roll; a detection roll rotatably held by the roll rotation driving body and in contact with each of the continuous casting rolls; And a rotation detecting means for detecting rotation of the detection roll accompanying the movement of the driving body. 2. The roll rotating body according to claim 1, wherein the roll rotation driving body comprises two opposing plate members, and the urging means urges both the plate members from inside to outside. A continuous casting roll rotation detecting device, which is disposed between the rollers.