JPS5923904B2 - Continuous casting machine roll spacing measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for measuring the spacing between opposing rolls of opposing roll rows of a continuous casting machine with particularly high accuracy.

In a continuous casting machine for molten metal, such as steel, the alignment of the rolls that guide the slab is important.
) directly affects the quality and properties of the slab, so its management is important.

The alignment of the rolls is mainly determined by the spacing between the opposing rolls, and if the continuous casting machine is of a curved type in particular, the spacing of the rolls has a strong influence on this curvature and influences the roll alignment. . Conventionally, the distance between the rolls of the opposing roll rows of the above-mentioned continuous casting machine has been measured in the following manner. That is, as shown in FIG. 1, a displacement gauge 2 is installed on a dummy bar 1 used in the initial stage of continuous casting, and
I was trying to measure the distance. However, as shown in Fig. 1, the dummy bar 1 of a continuous casting machine has a thickness W that is considerably thinner than the roll interval (distance between rolls 3 and 3'), and is especially used in a curved continuous casting machine. As shown in FIG. 1, this type of link mechanism has the following disadvantages. That is, from the above, the dummy bar 1 tends to be tilted as shown in FIG. 2, and when the roll spacing is measured in this tilted state, the measurement points are a and a', and the measured value and the regular roll spacing 8. This results in a large measurement error ΔE. In addition, if the difference between the set roll interval S and the thickness W of the dummy bar 1 is large, the dummy bar 1 is likely to tilt, and the degree of tilt increases, and the measurement error ΔE further increases.
The displacement meter 2 installed on the dummy bar 1 becomes unable to measure the roll distance S because the amount of displacement increases and exceeds its permissible measurement range. Furthermore, when the dummy bar 1 is used, water spraying for cooling the slab has already started between the rolls, and the displacement gauge 2 is required to be water resistant for casting purposes. Moreover, many of them are complicated, and it is difficult to obtain satisfactory water resistance. The present invention
The object of the present invention is to alleviate the above-mentioned conventional drawbacks and provide a highly accurate roll spacing measuring device.

The present invention will be described in detail below, focusing on embodiments shown in the drawings. The roll distance measuring device shown in FIG. 1 is a mechanism that measures, for example, the vertical distance from the dummy bar 1 to the roll. An error ΔE occurs.

The basic idea of the present invention is that the cross section of the rolls is circular, so when measuring the distance between opposing rolls in a continuous casting machine, a point on the outer periphery of the rolls that is on or near the connection between the axes of the opposing rolls is used as the axis. External measurement surfaces with the same center and independently rotatable are detected by arc-shaped opening/closing arms, and the distance between the opposing rolls is determined based on the angle θ formed by the two arms. It is intended to do so. This is schematically shown in Figure 3. When measuring the roll spacing in this manner, there is almost no measurement error no matter how much the rotation shaft provided on the dummy bar is tilted due to the inclination of the dummy bar. What is shown in FIGS. 14 to 6 is an embodiment of the apparatus of the present invention.

Figure 4 is a side view of this device, and Figure 5 is A- in Figure 4.
6 is a sectional view taken along line B-B in FIG. 5. A in the figure is the casing of this device. The upper opening/closing arm 5 and the lower opening/closing arm 6, each having an arcuate outer surface, are independently rotatable and have the same axis. That is, the upper arm 5 is attached to the casing 4.
is fixed to one end of the rotatable inner shaft 7. At the other end of the inner shaft 7, a shaft center 8 is received by a bearing 9 provided in the casing 4. The lower arm 6 is fixed to one end of an outer shaft 10 which allows the lower arm 6 to rotate freely with respect to the casing 4. The radii of curvature of the tip roll distance measuring parts 5'' and 6' of the arms 5 and 6 are, for example, equal to the set roll distance.The outer circumference of the outer shaft 10 is
The inner shaft 7 is received by a bearing 11 provided in the
A bearing 12 is interposed at the contact portion with the inner shaft 7 in order to be able to rotate freely against the inner shaft 7. The upper arm 5 and the lower arm 6 are elastic bodies, for example, a spring 1 whose one end is fixed to a pin 33.
3 and 14 apply forces in the opening directions C and C, respectively. In this way, the axes of the upper arm 5 and the lower arm 6 are made the same, and each can be independently rotated. A sector-shaped gear 15 is fixed to the inner shaft 7, and this sector-shaped gear 15 matches a gear 16 inside the casing 4.

A pinion 18 is fixedly attached to the shaft 17 of this gear 16, and this pinion 18 coincides with a rack 19. Note that the number 20 in the figure is a bearing for the shaft 17. Easy 1 above
9 is slidable along a guide shaft 21, and a shaft 22 provided at one end also moves synchronously with the rack 19. Also,
A sector-shaped gear 15' is similarly fixed to the outer shaft 10, and this sector-shaped gear 15' coincides with a gear 16' inside the casing 4. A pinion 18/ is fixed to the shaft 17' of this gear 16', and this pinion 18'
coincides with rack 19'. In addition, number 20' in the figure
is the bearing of the shaft 17'. The rack 19' is slidable along the guide shaft 2' and has a shaft 22 provided at one end.
' also moves synchronously with the rack 19'. Rack 19 above
Further, the amount of displacement of 19', that is, the amount of rotation of arms 5 and 6, is detected by displacement amount detectors indicated by numbers 23 and 23' in the drawing.

Number 24 in the figure indicates an oil seal. In this measuring device, if the distance between adjacent rolls is large, the arms should be shaped so that the tip measurement parts of the upper arm 5 and lower arm 6 serve as guides when moving the device during measurement. is preferred. The roll spacing is measured using the apparatus having the above configuration as described below.

As shown in FIG. 7, the device G assembled in the dummy bar 1 is moved within the roll row group when the dummy bar 1 is inserted or pulled out.

Note that 32 in FIG. 7 indicates a mold of a continuous casting machine. During the movement, the springs 13 and 14 act to apply an outward force to the upper arm 5 and the lower arm 6, each of which has an arcuate outer surface. However, the measuring portions 5' and 6' of the upper and lower arms 5 and 6 of the levers come into contact with the opposing rolls 3 and 31 at one point, respectively, regardless of the size of the roll interval. At this time, the contact point is located on the connection between the axes of the rolls 3, the upper arm 5 is held down, and the inner shaft 7 to which the upper arm 5 is fixed is rotated clockwise. As the inner shaft 7 rotates, the fan-shaped gear 15 is also rotated clockwise. At this time, the gear 16 and pinion 18 are rotated counterclockwise. The rack 19 thus moves in the direction of arrow D, and the shaft 22 attached to this rack 19 also moves in the same direction. This amount of movement X is detected by the detector 23. The lower arm 6 is also held down in the same way, and the outer shaft 1 to which the lower arm 6 is fixed
0 is opposite to the inner axis 7, that is, rotation is given in a counterclockwise direction. As the outer shaft 10 rotates, the fan-shaped gear 15
Similarly, the gear 16' and the pinion 181 are rotated clockwise.The rack 19' moves in the direction of the arrow DI, and the rack 19'' is rotated counterclockwise. The attached shaft 22' also moves in the same direction. This amount of movement ~ is detected by the detector 237. Therefore, the detected movement amounts X and x! For example, as shown in FIG.
5' amplify each signal and send it to an adder 27 together with a bias 26.

The signal added by the adder 27 is displayed on the display 28 as the distance between the rolls 3 and 3'' (roll spacing S). 9 and 10 are other embodiments of the present invention, in which the same numbers as those of the apparatus shown in FIGS. 4 to 6 indicate the same parts. refers to

This embodiment specifically uses a goniometer as the detector. In the figure, reference numeral 29 denotes a mounting base for the angle meter, which is directly connected to the outer shaft 10. 30 is the fixed side of the angle meter, and 31 is the rotating side of the angle meter.

Therefore, when measuring the roll interval, the angle formed by the upper arm 5 and the lower arm 6 is measured, and the roll interval is determined from this angle. As explained above, according to the present invention, when measuring the distance between opposing rolls in a roll row group of a continuous casting machine, the opening/closing arm has the same axis and has two rotatable outer surfaces in the shape of an arc. and a displacement detector for these arms, and since the arms are made to apply force in the opening direction using an elastic body, the roll and the arms are in point contact and the angle formed by both arms is in the measurement state. Even if changes occur, there will be no change at all.

However, since the roll spacing is determined based on the angle of the lever, there is no measurement error. In addition, in the present invention, the two arcuate arms for measuring the roll spacing are configured to apply force in the opening direction centering on the point where they are pivoted, so even if there is a large difference between the set roll spacing and the dummy bar, the measurement There are no errors and there is no possibility that the roll spacing cannot be measured.

Furthermore, the device of the present invention has a simple structure, and in the embodiment, all arms except the arms 5 and 6 are housed within the casing 4, making waterproofing easy. Furthermore, in the present invention, measurement errors caused by misalignment of the rolls 3, 3' are also minimal.
In other words, as shown in Fig. 11, when the centers of the upper and lower rolls are deviated by a distance H, the measurement reference point for the roll spacing S is 1 or 12, but in conventional measurement, the value of the roll spacing S obtained is 1 also in case of. It becomes +11. In the measurement of the present invention, since each measurement part is arc-shaped, the other contact point 3 with respect to the measurement reference point (or 2) approaches the other reference point 12 than the contact point 14 on the vertical line of the reference point 11. Therefore, the value of the roll spacing S obtained is 1. Not only is it smaller than +11, but actually this error 12 is the true interval 1. However, the value is so small that it can be ignored. It should be noted that there are various other modifications of the device of the present invention described above, and their aspects are as follows. Although one axis is the same, one of the upper and lower arcuate arms is placed on one side of the roll axis of the continuous casting machine, and the other is placed on the opposite side.

2. In the apparatus shown in FIGS. 4 to 6, the displacement amount of the upper arm and the displacement amount of the lower arm are detected by one detector, for example, a differential transformer, as the arm rotation amount detector.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional roll distance measuring device, Fig. 2 is an explanatory diagram of a conventional measurement situation, Fig. 3 is a model diagram of the device of the present invention, and Fig. 4 is an embodiment of the device of the present invention. 5 is a sectional view taken along line A-A in FIG. 4, FIG. 6 is a sectional view taken along line B-B in FIG. FIG. 8 is a diagram showing signal processing of the device of the present invention, FIG. 9 is a perspective top view of another example of the device of the present invention, FIG. 10 is a perspective view of FIG. FIG. 1...Dummy bar 1, ``...-...Dummy bar head, 2...Displacement meter, 3, 3'...
Roll, 4...Casing, 5...Upper opening/closing arm, 5''...Upper arm roll interval measurement section, 6...Lower opening/closing arm, 6 ″・・・・・・
Lower arm roll interval measurement part, 7...Inner shaft,
8...Axis center, 9...Bearing, 10...
-...Outer shaft, 11 bearing, 12...Bearing, 13
...Spring, 14...Spring, 15,15'...Sector-shaped gear, 16,16!
...Gear, 17, 1γ...Axle, 18,
18'...Pinion, 19,19'...
・Rack, 20, 20'...Bearing, 21, 2'
...Guide shaft, 22, 22' ... shaft,
23, 23 (... Displacement detector, 24...
...Oil sheet, 25, 25 (...Amplifier, 2
6...Bias, 27...Adder, 2
8...Display unit, 29...Mounting stand, 30
...Fixed side of the angle meter, 31...Rotating side of the angle meter, 32...Mold, 33...Pin.

Claims (1)

[Claims] 1. The outer surface of the roll interval measuring section at the tip is provided to rotate independently on the inner and outer shafts having the same axis.2
Roll spacing of a continuous casting machine consisting of two opening/closing arms, a detector for the amount of opening/closing displacement of the arms, and an elastic body that applies force in the opening direction to both arms so that the measurement part of the arm contacts the roll to be measured. measuring device.