JPH0557065B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a center used for adjusting the roll alignment of a roll stand of a continuous casting machine to an appropriate one outside the continuous casting machine (referred to as offline). It is related to the dispensing device.

[Conventional technology]

In the cooling zone following the mold of the continuous casting machine, a roll stand equipped with a plurality of rolls is installed with the roll surfaces facing each other so as to sandwich the slab in order to guide the slab cast in the mold downward. ing. It is known that the roll alignment of this roll stand has a great effect on the quality of slabs. That is,
If the roll alignment of the roll stand is bad,
The static pressure of the molten steel during casting causes the slab to bulge (referred to as bulging), leading to internal or external defects in the slab. Therefore, it is extremely important for the quality of continuously cast slabs to minimize this bulging and to achieve roll alignment of the roll stand that allows the slab to be pulled out at a constant thickness. For this reason, conventionally, for example, a roll centering device for a roll stand for a continuous casting machine as shown in FIG. 5 has been used, and the roll alignment of the roll stand has been maintained off-line.

The centering device basically includes a measuring base 32 having a space in the center for placing the roll stand 31 to be measured, and a measuring base 32 that is erected on the base 32 in front and behind the roll stand 31 to be measured. It consists of a gauge stand 33 and a roll alignment gauge 34 placed on the gauge stand 33, and its centering is performed in the following manner.

First, the roll stand 31 to be measured is placed at a predetermined position on the measurement base 32, and the gauge stands 33 are set up in front and behind it. Next, the roll alignment gauge 34 is placed on the gauge stand 33. After this, roll alignment gauge 3
4 and the top end of each roll 35 of the roll stand 31 to be measured is measured using a feeler gauge (not shown), and if it is outside the predetermined value, install a shim between the roll stand body and the bottom surface of the roll bearing. Insert and remove, gap χ
is adjusted so that it becomes a predetermined value.

[Problem to be solved by the invention]

By the way, in the roll centering device of the roll stand for a continuous casting machine, the roll alignment gauge 34 and each roll 35 of the roll stand 31 to be measured are
To measure the gap χ with the top of the
It relies heavily on sense, and requires skill to measure the gap accurately and quickly, so not everyone can do it. Moreover, in recent years, the distance between the rolls 35 provided on the roll stand 31 has become narrower, so it is difficult to adjust the shim between the roll stand main body and the lower surface of the roll bearing after all the rolls 35 are installed on the roll stand main body. As this process has become more common, it has become necessary to center the rolls 35 one by one, which increases the number of times the roll alignment gauge 34, which is a heavy object, must be moved, which is very time-consuming. At the same time, it has become a task that requires more attention to safety than ever before.

In view of the above-mentioned problems, the present invention has been devised to provide a continuous casting system that enables roll centering for adjusting the roll alignment of a roll stand to be performed safely, easily, quickly, and accurately without requiring much skill. It is an object of the present invention to provide a roll centering device for a machine roll stand.

[Means to solve the problem]

In order to achieve the above object, a roll centering device for a roll stand for a continuous casting machine according to the present invention has the following features:
A measurement base having a space in the center for placing a roll stand to be measured, a portable laser device placed on the base parallel to the roll axis of the roll stand to be measured and placed on the side of the space, and a base. and a portable height gauge device placed on the roll of a roll stand to be measured placed on the laser device, and the laser device is provided with a laser oscillator, a semi-transparent mirror, and a laser receiver for position detection. , the height gauge device is provided with a laser reflecting prism attached to the height gauge.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a schematic side view of a roll centering device for a roll stand for a continuous casting machine according to the present invention, and FIG. 2 is a schematic top view thereof. In the figure, reference numeral 1 denotes a measurement base, on the top of which a roll stand 3 is placed in the center with the roll 2 facing upward, and a predetermined position is placed on one side of the roll stand 3 parallel to the roll axis. A height gauge stand 4 is placed.

Reference numeral 5 denotes a portable laser device, which is composed of a leg portion 6 and a box portion 7, and is placed on the upper surface of the gauge stand 4. Inside the box part 7, as shown in the vertical cross-sectional view in FIG.
A silvered mirror) 7b, a lens 7c provided in front of the semi-transmissive mirror 7b, and a laser receiver 7d for position detection provided on the side of the semi-transmissive mirror 7b are provided.

Reference numeral 8 denotes a portable height gauge device, and as shown in an enlarged view in FIG. A height gauge support stand 1 is fixedly installed on the substrate 11 and consists of a substrate 11 and two support rods 12 erected on the substrate 11.
3, a height gauge 14 supported by a support rod 12 so as to be movable up and down, and a prism 17 provided on the side of the height gauge 14 so as to be adjustable in position via a frame 16 supported by an adjustment screw 15. has been done. In addition, in the figure, 18 is height gauge 1
Reference numeral 4 indicates a measurement probe 18, and reference numeral 19 indicates an insertion hole for a measurement probe 18 provided through the magnet 10 and the substrate 11.

Reference numeral 20 denotes a computing device which has the function of receiving output signals from the laser receiver 7d of the laser device 5 and the height gauge 14 of the height gauge device 8, and outputting the computed results to the display panel 21.

Centering of the roll 2 on the roll stand 3 using the centering device prepared as described above is performed as follows.

First, the laser oscillator 7a of the laser device 5 placed on the upper surface of the gauge stand 4 that has been set in advance
input the height h1 to the top of each roll 2 on the roll stand 3, the height h2 to the top of each roll 2 on the roll stand 3, and the length h3 from the tip of the measurement probe 18 of the height gauge 14 to the reference position of the prism 17 to the computer 20. do.

Next, the laser oscillator 7a of the laser device 5 is activated to oscillate a laser beam. At this time, a portion of the oscillated laser is reflected by the semi-transmissive mirror 7b and enters the laser receiver 7d, and a portion of the laser beam is transmitted through the lens 7c. The laser beam transmitted through this lens 7c travels straight toward the prism 17 of the height gauge device 8. In the prism 17, the laser that has gone straight is reflected by the reflecting plates 17a and 17b, which are provided at an angle of 90 degrees, as shown in FIG. Therefore, the laser beams incident on the reflecting plate 17b are each reflected from the reflecting plate 17a and returned. The returned laser passes through the lens 7c, is reflected by the semi-transparent mirror 7b, and enters the laser receiver 7d. As a result, the positional deviation between the oscillating laser and the reflected laser entering the laser receiver 7d, that is, the height gauge 1 when set on the roll 2 with respect to the reference height h1.
4 is measured. Then, the value 12 on the height gauge 14 at this time is read. Thereafter, the height gauge 14 is lowered until the tip of the measurement probe 18 contacts the top end of the roll 2, and the value 13 of the height gauge 14 at the time of contact is read.

In this way, the set values h1, h2, and h3 input to the calculator 20 and the measured values 11, 12
and 13, the difference e from the normal roll height
is calculated by the following formula. Further, the calculation result is output to the display panel 21.

e=h1+l1-{h2+h3+(12-13)} By inserting and removing the shim amount corresponding to the difference e calculated above between the roll stand body and the lower surface of the roll bearing, the roll alignment of the roll stand 3 can be maintained with high accuracy. Ru.

〔Effect of the invention〕

As described above, according to the roll centering device for a roll stand for a continuous casting machine according to the present invention, the roll alignment of the roll stand can be adjusted safely, easily, quickly, and accurately without requiring much skill. can.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a roll centering device for a roll stand for a continuous casting machine according to the present invention, Fig. 2 is a schematic top view thereof, and Fig. 3 is a schematic diagram of a box portion of a portable laser device. A longitudinal sectional view, FIG. 4 is an explanatory diagram of a portable height gauge device, and FIG. 5 is an explanatory diagram of a conventional technique. DESCRIPTION OF SYMBOLS 1...Measurement base, 2...Roll, 3...Roll stand, 4...Gauge stand, 5...Portable laser device, 6...Legs, 7...Box part, 7a...
...Laser oscillator, 7b...Semi-transparent mirror, 7c...Lens, 7d...Laser receiver, 8...Portable height gauge device, 9...Triangular groove, 10...Magnet, 11...Substrate, 12 ...Support rod, 13
... Support stand, 14 ... Height gauge, 15 ... Adjustment screw, 16 ... Frame, 17 ... Prism,
18...Measurement probe, 19...Insertion hole, 20...
...Arithmetic machine, 21...Display panel.

Claims (1)

[Claims] 1. A measurement base having a space in the center for placing the roll stand to be measured, a portable laser device placed on the side of the space on the base parallel to the roll axis of the roll stand to be measured, and a base. and a portable height gauge device placed on the roll of a roll stand to be measured placed on a table, and the laser device is provided with a laser oscillator, a semi-transparent mirror, and a laser receiver for position detection. On the other hand, a roll centering device for a roll stand for a continuous casting machine, characterized in that the height gauge device is provided with a laser reflecting prism attached to the height gauge.