JPS6319509A - Cast billet pass line measuring instrument of continuous casting machine - Google Patents

Abstract

PURPOSE:To measure the position of a cast billet pass line and a cavity with a high precision by mounting a pass line detecting part on a slide unit part. CONSTITUTION:The titled instrument consists of a pair of reference gauge parts 60 which are arranged on both side end parts of the cast billet pass line and each of which consists of a guide part 1 as the reference of the pass line and a rail part 2 joined into one body, a slide unit part 3 run on the rail part 2, and a distance measure 30 which is arranged to face the unit part 3. The unit part 3 is attached to the rail part 2 with a steel ball between them without a gap. A base member 4 is fixed to the unit part 3 and is moved together with the unit part 3 along the rail part 2. A detecting part is attached to the member 4 in the measure 30 to measure the position and the cavity of the ingot pass line consisting of a mold 5 and roll groups 6 and 7 of a roll unit 8. Thus, the unit part 3 is lightly moved along the rail part 2, and consequently, they are measured with a high precision by the detecting part mounted on the unit part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a slab pass line measuring device for a continuous casting machine.

[Conventional technology]

If the position of the slab pass line and the deviation of the cavity formed between the opposing side molds and rolls of a continuous #PJ machine exceed the allowable range, the quality of the slab will be adversely affected, and the slab will suffer from internal cracks, horizontal cracks, etc. Defects such as center segregation occur, and the rolls in the pass line are subjected to a larger load than normal, which can lead to accidents such as roll breakage and bearing damage, leading to a shutdown of the operation. To prevent these situations, #P
The position of the one-piece pass line and the cavity must be controlled with precise precision.

Conventionally, the position of the slab pass line and the cavity were measured using a measuring instrument attached to the traction tool of the dummy bar head during operation, as disclosed in, for example, Japanese Patent Application Laid-Open No. 54-1235.54-1236. Measurements are taken at the time of charging the damibar, but when operations are suspended for repairs or for maintenance at a location off the production line, workers have to enter a narrow pass line to take measurements, which results in a lot of fatigue due to lack of physical freedom. There are many imperfections, and therefore measurement accuracy is low.
Conventional technical means have many problems in terms of safety and health, measurement accuracy, time required, etc.

Therefore, as a solution to these problems, JP-A-49-1
The technical means thereof is disclosed in JP 05726.54-108660.

This forms a so-called reference gauge that has a shape that follows the curved part of the continuous casting machine, that is, a shape that has a radius of curvature that serves as a reference for the curved part, and a curved part of the continuous casting machine that is provided on this reference gauge. It is equipped with a measuring device that comes into contact with the roll and measures the distance from the radius of curvature.By moving the measuring device along the reference gauge, the position of the slab pass line can be determined.
This allows cavity measurements to be performed.

11, 12, and 13 show examples of these devices, and FIG. 12 is a view taken along the line DD in FIG. 11. 31 is a reference gauge, 39 is a measuring device, measuring device 39
As mentioned above, the board 40 carrying the reference gauge 31
In the examples shown in FIGS. 11 and 12, rollers 41, 42, and 43 are provided on the substrate 40 to make it movable, and 44, 45, and 46 indicate roller axes. 1
In FIG. 3, the reference gauge 31 is provided with a running rail 47 of the measuring instrument 39, and within the running rail 47 is provided a roller 48 and a gear type drive device 49 as a driving source for movement.
50 indicates a rack.

Therefore, in the apparatus shown in FIGS. 11 to 13, the reference gauge is fixed within the pass line of the slab.

By then moving the measuring device, the measurement of the roll position will be realized.

[Problem that the invention seeks to solve]

However, the prior art devices have the following problems. The measuring instrument is moved by guide wheels such as rollers or rollers that are in contact with the reference gauge, and the guide wheels are pressed by an elastic body from one side to minimize the gap between the guide wheels and the running surface of the curved gauge. However, it is difficult to select the appropriate elastic force for an elastic body.

In other words, if the elastic force of the elastic body is too strong, it will be difficult to run, and if it is too weak, gaps will easily form.Also, even if the elastic force is adjusted to an appropriate level, small foreign objects may not be allowed to touch the running surface. If the elastic body gets caught, or if an abnormal force greater than the elastic force acts in the opposite direction to the direction in which the elastic body is pressing, the Run. The amount of movement appears directly as a measurement error.

This method of driving the guide wheel in contact with the top, bottom and side surfaces of the curved gauge has problems in running accuracy, nimbleness, and structural complexity.

An object of the present invention is to solve the problems of the prior art described above, and to accurately and easily run along a curved gauge when automatically measuring the position and cavity of a slab pass line, and to obtain highly accurate measurement results. The object of the present invention is to provide a slab pass line measuring device for a continuous casting machine.

[Means for solving problems]

The present invention solves the above-mentioned problems by providing a reference gauge with the same shape as the radius of curvature of the slab pass line in the slab passage of a continuous casting machine, and installing a measuring instrument on a rail provided on the reference gauge. It was applied to a slab pass line measuring device that measures the pass line of a slab by running it, and the following technical measures were adopted. In other words, ■ a pair of reference gauge sections that are arranged at both ends of the pass line and are integrally composed of a guide section and a rail section that serve as the reference of the pass line; A slab pass line measuring device is installed on each slide unit section from a distance RA measuring device installed opposite the rolls above and below the pass line of the continuous casting machine. Configured.

[Effect]

The slide unit used in the present invention is a high-precision linear travel bag using linear motion bearings, and the preloaded steel balls slide along the grooves machined on both sides of each rail of the reference gauge part. It moves on each rail by rotating smoothly, and has good running accuracy and is nimble. Therefore, by installing a pass line detection section in this slide unit, it is possible to measure with high accuracy the position of the slab pass line and the cavity formed between the opposing long sides of the molds and between the rolls of the continuous N-forming machine. I can do it.

Furthermore, in the device of the present invention, since the slide unit section equipped with the pass line detection section is provided at both ends of the pass line, it is possible to measure the pass line at both ends of the roll at the same time, and the measurement time can be significantly shortened. .

Also, unlike the prior art means for running the guide wheel in contact with the upper and lower surfaces and side surfaces of the curved gauge, the structure is simple and does not require a complicated structure.

〔Example〕

The present invention will be explained in detail with reference to the drawings. Figures 1 and 2
The figures show an embodiment of the slab pass line measuring device of the present invention applied in offline mode, with FIG. 1 being a side view and FIG. 2 being a front view.

In Fig. 1, after the mold 5 and the roll unit 8 directly under the PI mold of the continuous casting machine are used in the production line, they are inspected or replaced off-line, but at this time, the position of the slab pass line must be checked. Adjust the cavity. In this case, the correspondence to the slab thickness size is as follows:
This is done by replacing the roll unit 8.

The roll unit 8 other than the pI type is maintained off-line after being used in the production line, and at this time, the position of the slab pass line and the cavity must be adjusted. Also,
When installing the roll group maintained off-line to the operation line, the position of the slab pass line with the adjacent roll units 8 on both sides is adjusted. In this case, adaptation to the thickness of the slab is carried out by fixing the 10th-rule group 6, which has a large radius of curvature, and moving the 20th-rule group 7, which has a small radius of curvature.

The guide part 1 and the rail part 2 constituting the reference gauge part 60 are inserted between the 10th rule group 6 and the 20th rule group 7,
The lower end is held by a fixture 11, and the upper end is supported and fixed by a support rod 10, and the measuring instrument 30 running on the rail section 2 can be suspended, raised, and lowered by a wire 12. ing.

As shown in FIG. 2, the reference gauge parts 60 are provided at both ends of the pass line, and the measuring instruments 30 are also provided at each end, so that measurements can be taken at two locations in the width direction of the roll at the same time.

In the reference gauge part 60, the guide part 1 has a cross-sectional structure shown by the dotted line in FIG. It is assembled with flanges 15 provided at the upper and lower ends, and 61 indicates bolt holes for assembly. Figure 4 shows the lower end structure of the reference gauge part 60, and the fixing metal fittings. 11 and is integrated via a flange 15 with a lower end portion 16 having a concave surface that engages with 17.
19 indicates a reinforcing metal fitting for the retaining portion, 19 indicates a positioning and fixing tool for the rail portion 2, which will be described later, and 18 indicates a stopper, at which the measuring instrument 30 is stopped.

:The details of the connection between the mounting seat 13 and the rail RB2 and the connection between the rail part 2 and the slide unit part 3 in Fig. tS4 are shown in Figs. As shown in the figure, the rail section 2 is provided with screw holes 21 at predetermined intervals, and on both side surfaces perpendicular to the outer surface of the rail section 2 are grooves for moving a steel ball that rotates while holding both side surfaces. 22 are provided. The rail part 2 is
We selected a wear-resistant material that does not deform even after long-term use, heat-treated it, and made the rotating part as lightweight as possible.

As shown in FIG. 6, the rail portion 2 is pressed against the reference surface 23 of the mounting seat 13 to ensure accuracy in the width direction, and is fixed at this position with screws 20. Further, as shown in FIG. 4, fixing A19 is mounted and supported at appropriate intervals on the side opposite to the reference surface 23. The slide unit 3 is slid onto the rail 2 mounted in this manner, and the base member 4 of the measuring instrument is fixed to the slide unit 3 with screws 51. As shown in FIG. 7, the slide unit part 3 is attached to the rail part 2 without a gap through its component steel balls 33, and moves easily and accurately along the rail part 2.

Like the rail section 2, the slide unit section 3 is also made of a wear-resistant material that does not deform even after long-term use, and is heat-treated.

The slide unit section 3 includes a casing 32, steel balls 33.
Steel ball holding band 34, bearing plate 35, seal 36. Preload adjustment screw 37. It is composed of a grease nipple 38 and the like. By operating the preload adjustment screw 37, the pressure to press the bearing plate 35 can be changed, and the groove 2 of the steel ball 33 can be changed.
It is designed to change the pressure in contact with 2.

The steel ball 33 rotating in the groove 22 of the rail section 2 is periodically filled with grease from the grease nipple 38, so that it can move smoothly on the rail section z.

Further, it is preferable that the slide unit section 3 is provided with seals 36 on both end surfaces in contact with the rail section 2, and the base member 4 is moved on the rail section 2 while removing foreign matter on the surface of the rail section 2. and moves along the rail section 2 together with the slide unit section 3. As shown in FIGS. 8 to 1θ, the measuring device 30 is attached to a base member 4.
By attaching the detection part 9 to the mold 5. The position of the slab pass line formed by the 10th rule group 6 and the 20th rule group 7 of the roll unit 8 and the cavity are measured.

In offline measurements, as shown in Figure 1,
By fixing the upper and lower portions of the guide portion 1 at predetermined positions using the support rod 10 and the fixing metal fittings 11, the outer surface of the rail portion 2 having a large radius of curvature, which serves as a reference for measurement, is set at a predetermined reference position. Detection unit 9 along the set rail part 2
Measure the position of the slab pass line and cavity by moving the .

FIG. 9 shows a view taken along the line B-B in FIG. 8.

A measuring instrument mounting board 24 is integrally attached to the base member 4, which is fixed to the slide unit section 3 that moves on the rail section 2, at right angles and parallel to the guide section l. A detection unit 9 that comes into contact with the roll and measures the distance is fixed to this mounting board 24.

As shown in FIG. 8, the detection member 9 includes a detection section 9 corresponding to the 10th group and the 20th group, and the detection section 9 is connected to the contact roller 25 that contacts the roll group. , a slidable shaft 26 having a contact roller 25 at its tip;
The distance sensor 27 is composed of a differential transformer connected to the rear end of the shaft 2B.

In FIG. 8, the upper detection unit 9 first makes contact with the roll on the 10th-rule group side and measures the distance, and then when the lower detection unit 9 moves up, the 10th-rule group side roll is contacted and the distance is measured. By abutting against the 20th roll group 7 facing the roll on the group 6 side and measuring the distance, the roll spacing and roll position can be determined. .

In addition, 2 in Figures 8 and 10 (C-C arrow view in Figure 8)
8 indicates a fitting for connecting to the wire 12.

Reference numeral 29 in FIG. 8 indicates a locking device for fixing the board 24. The upper end of this locking device 29 is installed in the groove P shown by the dotted line in FIG. It can be moved along with the gauge.

Note that the detection signal from the distance sensor 27 may be either a wired method or a wireless method. In the case of a wired method, the detection signal is input to a signal processing device via a relay box and a cable reel, and the position of the pass line and cavity are calculated. The information may be inputted into a digital display, digital printer, etc., and the position of each roll in the roll group from the reference plane may be outputted to know the abnormality (not shown).

In the case of a wireless system, the transmitter is mounted on the board 24 and the signal is input to the signal processing device via a receiver provided outside the machine, and the other configuration can be the same as in the case of the wired system. .

-Next, a detection means using a disguise having the above-mentioned configuration will be explained.

First, it is necessary to adjust the interval between the contact rollers 25 in accordance with the size of the slab thickness of the continuous casting machine to be measured. This is done by adjusting the mounting positions of the upper and lower detection sections 9.

Next, insert the reference gauge part 60 (guide part 1 and rail part 2) into the slab pass line between the 10th rule group 6 and the 20th rule group 7, and fix it with the support rod 10 and the fixing hardware 11. . Figure 1 shows the state of measurement at a repair shop. By lowering or raising the base member 4, the detection unit 9
The contact roller 25 moves while contacting the M type 5 and the roll group 6.7, and detects the distance from the reference gauge section 60. Since the distance of the detection signal is calculated by performing signal processing as described above, the position of the slab pass line and the cavity can be detected simultaneously with high precision.

In the device of the present invention, the radius of curvature of the rail section 2 in the reference gauge section 60 is larger than that of the guide section 1, but the opposite arrangement may be made.

〔Effect of the invention〕

The slab pass line measuring device for a continuous casting machine of the present invention has the following excellent effects.

(1) Improved measurement accuracy and reliability of measurement data (accuracy ±0.1 mm → ±0.05 mm)
.

(2) The detection unit can now be moved easily and smoothly.

(3) Since the slide unit section equipped with the pass line detection section is provided at both ends of the pass line, it is possible to measure the pass line at both ends of the roll at the same time, and the measurement time can be significantly shortened.

(4) The structure of the traveling device is not complicated like conventional devices, but is simple.

[Brief explanation of the drawing]

FIG. 1 is an explanatory side view of an embodiment of the present invention, FIG. 2 is an explanatory front view of FIG. 1, and FIG.
Figure 4 is an explanatory diagram of the lower part of the reference gauge part in Figure 1, Figure 5 is an explanatory diagram of the side surface of the rail part and slide unit part, and Figure 6 is an explanatory diagram of the lower part of the reference gauge part in Figure 1.
The figure is a sectional view of the joint between the reference gauge section and the slide unit section, FIG. 7 is a perspective view of the slide unit section, FIG. 8 is an explanatory diagram of the measuring instrument, and FIG. 9 is a view taken along the line B-B in FIG. 8. Figure, 1st θ
The drawings are a view taken along the line c-c in FIG. 8 and FIG. 11. FIG. 12 (a view along the line DD in FIG. 11) and FIG. 13 are explanatory diagrams of the conventional example. 1... Guide part 2... Rail part 3... Slide unit part 4... Base member 5... Mold
6... 10th rule group 7... 20th rule group 8... Roll unit 9... Detection section
10...Support rod 11...Fixing metal fittings 12...
Wire 13...Mounting seat 14...Reinforcement material 15
... Flange 16 ... Lower end portion 17 ... Reinforcement fitting 18 ... Stopper 19 ... Positioning fixture 20 ... Screw 21 ... Screw hole 22 ...
・Groove 23...Reference surface 24...Mounting board 25
... Contact roller 26 ... Axis 27 ... Distance sensor 28 ... Connection fitting 29 ... Locking tool 3
0...Measuring instrument 31...Reference gauge 32...Casing 33...Steel ball 34...Steel ball holding band 35...Bearing plate 36...Seal 37...Preload adjustment screw 38 ... Grease nipple 39 ... Measuring device 40 ... Board 41.42.
43...Roller 44.45.46...Roller shaft 47...Traveling rail 48...Roller 49...Drive device 50...Rack 51...Screw
60...Reference gauge part 61...Bolt hole P...Groove

Claims (1)

[Claims] 1. A reference gauge having the same shape as the radius of curvature of the slab pass line is provided in the slab passage of a continuous casting machine, and a measuring device is run on a rail provided on the reference gauge to measure casting. In a slab pass line measuring device for measuring the pass line of a slab, a pair of reference gauges are provided at both ends of the slab pass line and integrally constitute a guide part and a rail part that serve as a reference for the pass line. , a slide unit section that precisely slides and travels on each rail section of the reference gauge section, and a slide unit section that is disposed in each of the slide unit sections to face the rolls above and below the pass line of the continuous casting machine, respectively. A slab pass line measuring device for a continuous casting machine, comprising a distance measuring device.