JPH0949768A - Method for monitoring casting roll alignment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform automatic measuring during molding or non-molding by detecting upward and downward movement, horizontal dislocation, torsion, rotation or the like between roll units and monitoring alignment abnormality therebetween. SOLUTION: A light source 26, a slit 27, a lens 28, a half mirror 29, mirrors 30, 31 and lenses 32, 33 are incorporated in one detection block 24a, and two-dimensional position detection elements 34, 35 are provided in the other detection block 24b. The elements 34, 35 output peak positions of light beams 37, 38 as right angle coordinate components, the components in the direction of x, y and z are detected therefrom and a three-dimensional alignment dislocation between the adjacent roll units is calculated. Thereby even during molding receiving large stress, continuous monitoring of alignment can be monitored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting roll alignment monitoring method used in a foundry or the like in the steel industry.

[0002]

2. Description of the Related Art Normally, in order to control roll alignment in a continuous casting machine 1, an operator 2 enters the continuous casting machine 1 as shown in FIG. Then, the distance between the ruler 4 and the roll 5 was set as a misalignment amount, and the value was adjusted so that this value was within a certain value (method 1).

Recently, as shown in FIG. 7, there is a place where the inclinometer 7 installed on the dummy bar 6 is used for measurement (method 2). This is because the inclinometer 7 for measuring the angle between the rolls 5 and the signal processing device for processing the signal obtained from the inclinometer 7 are mounted on the dummy bar 6, and the misalignment of the rolls 5 is performed by the procedure described below. The amount is calculated.

That is, as shown in FIG. 8, adjacent rolls 5
In order to measure the inclination angle θ with respect to the vertical between, a mechanism for pressing a flat plate body 8 on which the inclinometer 7 is loaded against the adjacent rolls 5 is mounted on the dummy bar 6. The signal obtained from the inclinometer 7 is (in the case of the dummy bar 6 downward insertion type continuous casting machine)
It is pulled out to the computer on the ground side. The inclinometer 7 measures the inclination angle θ for each roll 5 and outputs a signal to the ground-side computer, while the ground-side computer uses the following inter-roll distance L based on the pre-input distance L between the rolls. The alignment measurement value D is calculated using the obtained value of the inclination angle θ, and the misalignment amount is obtained from the difference between the alignment measurement value D and the alignment design value D.

[0005]

[Equation 1]

Further, as shown in FIG. 9, the shoe 9 is pressed between the three rolls 5 at the positions of the first and third rolls so that the second roll is on the first and third envelopes. There is a method of calculating the misalignment amount by measuring the amount of deviation from the contact displacement sensor 11 having the contact 10 (method 3).

[0007]

However, the conventional method (method 1) in which the operator 2 enters the continuous casting machine 1 for measurement as shown in FIG. 6 requires not only a great amount of labor and time, but also a long time. It was impossible to perform fine roll alignment management because it could only be done during the factory downtime.

On the other hand, in the conventional method (method 2) using the inclinometer 7 shown in FIGS. 7 and 8, since the relative position of the inclination angle of the adjacent rolls 5 is measured, sufficient accuracy cannot be obtained. In addition, although the method using the inclinometer 7 requires the distance between the rolls to calculate the alignment amount, the distance between the rolls often changes in practice. In particular, the tendency is strong in the roll-to-roll distance between adjacent roll units 3 (for convenience of stand installation). Therefore, even if the alignment itself is not so out of order, the accuracy cannot be obtained because the set value used in the calculation is different from the actual roll-to-roll distance.

Further, in the case of Method 2, even if the roll 5 is displaced from the normal position shown by the solid line as shown in FIG. 10 and the roll pitch is displaced as shown by the broken line, misalignment cannot be detected. Can not. This also applies to the case of the three-point measurement method (method 3) shown in FIG. The biggest drawback is that the methods 1 to 3 can be measured only during non-casting. In a recent continuous casting machine, there is a place where a cast piece being drawn is subjected to reduction, so that a large reaction force is applied to the roll 5. Therefore, it is presumed that there is a difference in alignment in units of 0.1 mm between casting and non-casting. Therefore, it is required that alignment can be constantly monitored regardless of casting. For this purpose, the method in which the measuring device is incorporated in the dummy bar 6 like Method 2 and Method 3 cannot achieve the purpose.

On the other hand, the roll alignment abnormality is caused in one roll unit 3 (the roll unit is shown in FIG. 11 or FIG. 5).
As shown in, a plurality of roll pairs are housed in one frame, which is also called a roll stand. ) Occurs less frequently, and often occurs between the roll units 3. Each roll unit 3 is individually adjusted in a separate maintenance area 1
Since the roll alignment in the one roll unit 3 is easy to measure, it is set relatively accurately. However, an alignment error occurs between the roll units 3 when assembled in a continuous casting machine or due to stress caused by repeated casting. Therefore, if the misalignment between the roll units 3 is constantly and continuously measured, most of the purposes are achieved. By the way, this alignment abnormality occurs three-dimensionally, and there are various modes as shown in FIGS. 12 to 16 with respect to the normal roll alignment shown in FIG. appear.

Therefore, it is necessary to evaluate the influence when the deviation occurs,
These various misalignments must be identified and detected for correction and restoration work. In view of the above-mentioned problems, the present invention provides a means capable of always automatically measuring misalignment such as vertical, vertical, horizontal misalignment or twist between roll units during casting or non-casting. It is a thing.

[0012]

A first technical means of the present invention for solving this technical problem comprises a plurality of slab guide rolls extending from the mold to the secondary cooling zone exit side. In a continuous casting machine provided with a plurality of roll units each having a slab guide roll, by detecting vertical displacement between roll units, horizontal displacement, twisting, position displacement due to rotation, etc., during casting, non-casting Regardless of the inside, the abnormal alignment between the roll units is monitored.

The second technical means is to construct a slab guide roll group extending from the mold to the secondary cooling zone exit side.
In a continuous casting machine provided with a plurality of roll units having a plurality of slab guide rolls, the positional deviation between the reference point of the roll unit and the reference point of the roll unit adjacent to the roll unit is set on each reference point. The point is that three-dimensional detection is performed by the combination of the light source and the light receiving means incorporated in the deviation detection block.

Therefore, the misalignment between the roll units can be measured extremely stably. Also, roll alignment can be continuously monitored during casting, which is actually under high stress.

[0015]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the embodiments of the drawings. As shown in FIG. 5, the continuous casting machine is provided with a plurality of roll units 22 each having a plurality of slab guide rolls 21 so as to form a slab guide roll group extending from the mold to the secondary cooling zone exit side. A large number of slab guide rolls 21 forming a pair are continuously arranged at intervals from the mold. In the illustrated example, a roll unit 22 is configured in which three pairs of slab guide rolls 21 are housed in one frame, and the roll alignment between the three roll units 22 is measured. Each roll unit 22 has
As shown in, the metallic base 23 that serves as a reference point
Is stuck. As shown in FIG. 1, the displacement detection block 24 (24a, 24b) is securely attached to the base 23 of the reference point so that there is no displacement.

As shown in FIG. 1, corresponding shift detection blocks 24a, 24 between adjacent roll units 22 are provided.
b is not connected, and is installed with a gap so that adjacent roll units 22 do not come into contact with each other even if some deviation occurs. As shown in FIG. 3, one of the deviation detection blocks 24a and 24b is on the light source side, and the other deviation detection block 24b is on the light receiving side.

That is, one of the deviation detection blocks 24a has a light source 26 (which may be a lamp or a light emitting diode),
Slit 27, collimating lens 28, semi-transparent mirror 2
9, the mirrors 30 and 31, and the focusing lenses 32 and 33 are incorporated, and the two-dimensional light receiving elements 34 and 35 (PSD (position detecting element) in the embodiment) are provided in the other shift detection block 24b.
Is used. ) Is incorporated, the light of the light source 26 passes through the slit 27, and then is converted into a parallel light flux by the collimator lens 28, and the light is reflected by the semitransparent mirror 29.
One light beam 37 is divided into two light beams 37 and 38.
Is configured to go straight into the two-dimensional light receiving element 34, and the other light beam 38 enters the two-dimensional light receiving element 35 from below through the mirrors 30 and 31. Since a large amount of water and water vapor dust exist in the continuous casting machine, a stretchable waterproof cover 41 for dustproofing and waterproofing is attached between the deviation detection blocks 24a and 24b. The waterproof cover 41 may be made of rubber or metal plate bellows. As shown in FIG. 4, the light beams 37 and 38 are adjusted so as to be substantially in the middle of the two-dimensional light receiving elements 34 and 35.

The two-dimensional light receiving elements 34 and 35 may be CCD elements, but PSD is suitable for such a place. The PSD has two outputs and outputs the peak positions of the light beams 37 and 38 as a rectangular coordinate component. The vertical shift, the horizontal shift, and the vertical shift in FIGS. 12 to 14 are x,
Given y and z, these are directional components as shown in FIG. That is, when a vertical deviation (pitch) occurs only in the casting direction as shown in FIG. 12, the deviation detection block 24 in FIG.
Since a and 24b are displaced in the x direction in the figure,
However, the shift occurs only in the x direction, and the x direction component output signal of the two-dimensional light receiving element 35 changes. Two-dimensional light receiving element 3
The y-direction component output of 5 does not change, and the output of the two-dimensional light receiving element 34 does not change at all in the two-direction component. Below, y direction,
The same applies to the deviation in the z direction, and it becomes possible to detect the output corresponding to each deviation in each direction component. Since the two three-dimensional components of x, y, and z can be detected by the two two-dimensional light receiving elements 34 and 35, the three-dimensional alignment deviation between the adjacent roll units 22 can be completely detected. On the other hand, the shift amounts θ ₁ θ ₂ corresponding to the spread and twist shown in FIGS. 15 and 16 can be detected by converting the rectangular coordinates x, y, z into polar coordinates or cylindrical coordinates.

Although the misalignment has three degrees of freedom, it can deal with any coordinate axis expression because the three-dimensional space can be measured as described above. Although not shown in FIG. 3, a power source and a computer are connected to the deviation detection block 24b, and the three-dimensional deviation amount is obtained by calculation from the outputs of the two two-dimensional light receiving elements 34 and 35. In the embodiment of FIG. 5, only one set of deviation detection blocks 24a and 24b is attached between the two roll units 22. This is satisfactorily in principle, but in order to improve the accuracy, as shown in FIG. 2, a deviation detection block 24 is installed at the upper position of the roll unit 22 via the base 23, or in a wide slab continuous casting machine. It should be installed in two places in the width direction of the slab.

The reference point of the roll unit 22 is not limited to the position in the above embodiment, but the position of point a shown in FIG. 1 may be used as the reference point. In addition, in the above-described embodiment, FIG.
As shown in, the light source 26 is provided on the side of the deviation detection block 24a, and the two-dimensional light receiving element 34,
35 is provided, but instead of this, the deviation detection block 2
The two-dimensional light receiving elements 34 and 35 may be provided on the side of 4a, and the light source 26 may be provided on the side of the deviation detection block 24b.

[0021]

According to the present invention, the conventional method has a great influence on accuracy due to the way of contact between the shoe and the roll and the way of moving the dummy bar.
Misalignment between the roll units 22 can be measured extremely stably. Furthermore, roll alignment can be continuously monitored during casting, which is actually under high stress. Abnormality of slab It is possible to understand how roll alignment abnormality caused by repeated bulging and casting changes with time.

[Brief description of drawings]

FIG. 1 is a side view of a roll unit portion showing an embodiment of the present invention.

FIG. 2 is a schematic side view showing reference points of the roll unit.

FIG. 3 is a configuration diagram showing the same shift detection block.

FIG. 4 is a perspective view of the displacement detection block.

FIG. 5 is a side view of the continuous casting machine.

FIG. 6 is a side view showing a conventional example.

FIG. 7 is an enlarged side view of a dummy bar portion showing a conventional example.

FIG. 8 is a principle diagram for explaining a conventional example.

FIG. 9 is a schematic side view showing another conventional example.

FIG. 10 is a schematic side view for explaining a conventional problem.

FIG. 11 is a schematic side view for explaining a conventional problem.

FIG. 12 is a schematic side view for explaining conventional problems.

FIG. 13 is a schematic perspective view for explaining a conventional problem.

FIG. 14 is a schematic side view for explaining a conventional problem.

FIG. 15 is a schematic side view for explaining a conventional problem.

FIG. 16 is a schematic perspective view for explaining a conventional problem.

[Explanation of symbols]

 21 slab guide roll 22 roll unit 24 deviation detection block 26 light source 34 two-dimensional light receiving element

Claims (3)

[Claims] 1. A continuous casting machine provided with a plurality of roll units each having a plurality of slab guide rolls so as to form a slab guide roll group extending from a mold to a secondary cooling zone exit side. Motion, horizontal displacement, twisting,
A casting roll alignment monitoring method characterized in that an alignment abnormality between roll units is monitored by detecting a positional deviation due to rotation or the like. 2. A continuous casting machine provided with a plurality of roll units each having a plurality of slab guide rolls so as to form a slab guide roll group extending from the mold to the secondary cooling zone exit side. The positional deviation between the reference point of the roll unit and the reference point of the adjacent roll unit is three-dimensionally detected by the combination of the light source and the light receiving means incorporated in the deviation detection block installed on each reference point. Characteristic casting roll alignment monitoring method. 3. A shift detection block of the one roll unit is provided with one light source, and a shift detection block of the other roll unit is provided with a pair of two-dimensional light receiving elements in directions orthogonal to each other. It is characterized in that light is divided into light beams which are orthogonal to each other and input to the respective two-dimensional light receiving elements, and the positional deviation between the roll units is three-dimensionally detected by the respective two-dimensional light receiving elements. The casting roll alignment monitoring method according to claim 2.