JPH10274502A - Roller center distance measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the center distance of a large roller and execute measuring work of high efficiency by forming a movable head into multistage structure. SOLUTION: A downward movable head 11 is moved downward by energization of a spring 12 until a collar 15 comes in contact with a body case 2, and protruded by L1. A movable guide 23 of an upward movable head 21 is moved by energization of a first spring 28 until a collar 31 comes in contact with the body case 2, and protruded by L2. A detecting head 23 is moved upward by energization of a second spring 29 until a collar 32 comes in contact with a movable guide 22, and protruded by L3. When the height dimension of the body case 2 is L0, the maximum height Dmax of a roller center distance measuring device 1 is Dmax=L0+L1+L2+L3. The measuring range of the downward movable head 11 is P1 (P1<L1), and that of the upward detecting head is P3 (P3<L3).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll gap measuring device for measuring a roll gap between opposed guide rolls.

[0002]

2. Description of the Related Art In a continuous casting method, molten steel is poured into a mold (waterless mold without bottom) through a tundish, a solidified shell layer is formed on the mold surface (primary cooling), and the obtained slab is placed on the lower side. This is a method of continuously pulling out the sheet while performing secondary cooling between the guide rolls. The distance between a pair of opposing guide rolls is called a roll interval, and it is extremely important to properly maintain the roll interval. If the roll interval is wide, the dimension of the slab is deviated to the plus side, and if the roll interval is narrow, a large reaction force acts on the guide roll, causing damage to the bearing supporting the guide roll. Therefore, it is necessary to measure the roll interval and make adjustments when there is an error, but since the guide rolls are tens to hundreds of pairs, it is efficient to measure the roll interval manually by hand. Absent.

Therefore, as an apparatus for efficiently measuring the roll interval, for example, Japanese Patent Application Laid-Open No. Hei 4-15510, entitled "Roll Rotation Detection / Interval Measurement Apparatus and Method" has been proposed. FIG. 1 of this publication is reprinted below to explain the conventional device configuration (however, the reference numerals are re-assigned). FIG. 8 is a cross-sectional view of a conventional roll gap measuring device.
2, the movable head 103 is mounted on the upper part so as to be able to move up and down, the movable head 103 is pushed up by a spring 104, and the tip of the detection needle 106 of the displacement meter 105 is brought into contact with the bottom of the movable head 103. It has a structure, and is used with the roll interval measuring device 100 attached to the dummy bar 107.

A pair of opposing guide rolls 108, 109
To measure the roll interval, the roll interval measuring device 10
0 may be moved as shown by the arrow. Guide roll 108,
Since the movable head 103 sinks in accordance with the roll interval Rd when passing between the rollers 109, if the displacement or the position of the movable head 103 is measured by the displacement meter 105, the roll interval Rd
You can know.

[0005]

Since the roll interval can be measured by the roll interval measuring device 100 only by moving the dummy bar 107 between a very large number of guide rolls, the efficiency of the measuring operation can be improved. However, in recent years, the roll interval has been diversified along with the diversification of the slab size, and thus a roll interval measuring device capable of measuring a large roll interval has been required. Therefore,
The following measures or measures are taken. Prepare a plurality of roll interval measuring devices with different measuring lengths and replace them with Tammy bars each time. A plurality of movable heads (or fixed heads) having different lengths are prepared, and each time they are replaced with a roll interval measuring device.

[0006] The above is costly, the work of replacing the device with a tammy bar is troublesome, and the roll interval measurement time becomes long. The above can reduce the cost. However, there is an inconvenience that the movable head is bent or distorted by an impact when the tip of the long movable head comes into contact with the guide roll. In addition, since the operation of replacing the movable head is troublesome, the roll interval measurement time becomes longer. SUMMARY OF THE INVENTION It is an object of the present invention to provide a roll gap measuring device which does not require replacement work, is strong against impact, and can measure a large roll gap.

[0007]

In order to achieve the above object, a first aspect of the present invention is a roll gap measuring device for measuring a roll gap by moving between guide rolls arranged in pairs. The movable head has at least one movable head and a displacement meter for detecting the displacement of the detection head at the tip of the movable head, and the movable head has a multi-stage structure.

Since the movable head has multiple stages, a large roll interval can be measured. Furthermore, since there are multiple stages, the length of the detection head at the tip can be reduced. A short detection head can sufficiently withstand an impact or an external force. Since it is not necessary to replace the movable head, the work for measuring the roll interval can be performed efficiently.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a cross-sectional view of a roll distance measuring device (first embodiment) according to the present invention.
In the figure, a single-stage roll interval measuring mechanism 10 is mounted on a main body case 2 downward, and a two-stage roll interval measuring mechanism 20 is mounted on an upper side.

The single-stage roll interval measuring mechanism 10 includes a movable head 11 mounted on the main body case 2 so as to be vertically movable, a spring 12 for urging the movable head 11 downward, and a displacement for detecting the displacement of the movable head 11. It consists of 13 in total. 14
Is a detection rod, 15 is a flange, 16 is a lid, 17 is a dust seal, and 18 is an O-ring. Since the movable head 11 has one stage, it is called a single stage type. The dust seal 17 can prevent foreign matter from entering from outside.

The two-stage roll interval measuring mechanism 20 has a movable head 21 having a two-stage structure. The movable head 21 includes a movable guide 22 mounted on the main body case 2 so as to be vertically movable, and a movable guide 22. A detection head 23 movably mounted in the head 22 and a compression spring 2
4 and a liner 25 attached through the liner 4. Therefore,
The two-stage roll interval measuring mechanism 20 includes a movable head 21 having a two-stage structure, and a displacement meter 26 for detecting a displacement of the detection head 23 via the liner 25 and the compression spring 24.
28 is a first spring, 29 is a second spring, 31,
32 and 33 are flanges, 34 and 35 are dust seals, 36 and 3
7 is an O-ring, 38 is a detection rod, 39 and 41 are washers,
42 is a support and 43 is a lid. Dust seal 34,
35 prevents foreign matter from entering from outside.

FIG. 2 is a plan view of a dummy bar on which the roll distance measuring device of the present invention is mounted.
May be placed on the dummy bar 45 near the dummy bar head 46 from above and fixed with bolts 47... The mounting position is not limited. For example, if it is necessary to measure the vicinity of the mold of the roller apron (not shown), the dummy bar head 4
It is only necessary to attach them together by 6.

The operation of the above-described roll distance measuring device (first embodiment) will now be described. FIG. 3 is a view showing the maximum height of the roll gap measuring device according to the present invention.
5 moves downward until it hits the main body case 2 and protrudes by L1. Further, the upward movable head 21 moves the movable guide 23 upward until the flange 31 hits the main body case 2 by the pressing action of the first spring 28. The second spring 29 pushes the flange 32 to move the movable guide 22
, The detection head 23 moves upward and protrudes by L3.

If the height of the main body case 2 is L0,
The maximum height Dmax of the roll interval measuring device 1 is L0 + L
1 + L2 + L3. However, the measurement range is P1 (P1 <L1) for the downward movable head 11, and P3 (P3 <L3) for the upward detection head 23.

The movable head 11 sinks (retreats) by S1 because the guide roll 49 has risen by S1 from the position shown in the figure, and the detection head 23 has only S3 because the guide roll 48 has fallen by S3 from the position shown in FIG. Let's sink. The displacement meter 13 measures the distance S1 and transmits the signal,
Since the displacement meter 26 measures the distance S3 and transmits the signal, the current roll interval is calculated by an arithmetic unit (not shown) as Dmax-S
It can be calculated by the formula of 1-S3.

Next, the rigidity of the movable head 21 will be described. It is assumed that an external force F3 acts on the detection head 23 in a direction perpendicular to the axis due to collision or friction with the guide roll 48. If the detection rod 23 is a cantilever, the maximum bending moment in the detection rod 23 is (F3 × L3) and the maximum deflection is (F3 × L3 ³ / 3EI), where E is Young's modulus and I is the secondary moment of area. is there. If L3 is １ ／, the maximum deflection is ８. Therefore, the two-stage mechanism can significantly suppress the bending as compared with the single-stage mechanism.

FIG. 4 is a view showing the minimum height of the roll interval measuring device according to the present invention. The downward movable head 11 is retracted by L1 (see FIG. 3) against the spring 12, and the detection head is moved. 23 is L3 against the second spring 29
FIG. 3 shows a state in which the movable guide 22 is retracted by L2 (see FIG. 3) against the first spring 28. The important thing at this time is that P3 in FIG.
When the detection head 23 sinks only, the liner 25 cannot be further lowered by a stopper (not shown). Thereafter, the compression spring 24 contracts, and the liner 25 relatively enters the detection head 23, so that the liner 25 remains stationary and the detection head 23 descends. The result is shown in FIG. That is, the minimum height Dm of the roll interval measuring device 1
in is (L0 + L1 + L2 + L3) -L1-L2-L
3 = L0.

Maximum height Dma of roll interval measuring device 1
x, from the minimum height Dmin, the difference between the maximum height and the minimum height (hereinafter referred to as “height difference”) is Dmax−Dmin = L
1 + L2 + L3. Conventionally, only a single-stage roll interval measuring mechanism was provided, so the conventional height difference was only L1. This is (L1 + L2 + L3) in the present embodiment, and it can be said that the height difference has been increased three to five times.

An example of the effect of a large difference in elevation will be described. Depending on the equipment, after passing between guide rolls having a small roll interval, the roll interval measuring device 1 may be sent between guide rolls to be measured. The movable head 11, the detection head 23, and the movable guide 22 are sunk as necessary in a narrow place in the middle as shown in FIG. 4, and the state shown in FIG. In this case, when the present embodiment is not adopted, severe restrictions such as abandoning the measurement or devising a feeding method of the roll distance measuring device 1 are expected. In this regard, if the apparatus according to the present embodiment is adopted, the target measuring operation can be performed without any obstacle even if there is a small roll interval in the middle. From this, the greater the difference in elevation, the better the usability.

FIG. 5 is a cross-sectional view of a roll distance measuring device (second embodiment) according to the present invention. The roll distance measuring device 1B includes a two-stage roll distance measuring mechanism 20 mounted on a main body case 2 in an upward direction. The two-stage roll interval measuring mechanism 20 is attached downward as well as attached. The description of the detailed structure will be omitted by using the reference numerals of the first embodiment. In the roll interval measuring device 1B, Dmax is L0 + 2 ×
(L2 + L3), Dmin is L0, and the height difference is 2 ×
(L2 + L3), which is larger than in the first embodiment.

FIG. 6 is a sectional view of a roll gap measuring device (third embodiment) according to the present invention. In this roll gap measuring apparatus 1C, a two-stage roll gap measuring mechanism 20 is mounted on a main body case 2 upward. Attach and fix the fixed head 5
0 is attached. The description of the detailed structure will be omitted by using the reference numerals of the first embodiment. In the roll interval measuring device 1C, Dmax is L0 + L2 + L3 + L4, Dmin
Is L0 + L4, and the height difference is (L2 + L3).
It is smaller than Example 1, but larger than the conventional one.

FIG. 7 is a cross-sectional view of a roll gap measuring device (fourth embodiment) according to the present invention. In this roll gap measuring apparatus 1D, a three-stage roll gap measuring mechanism 20D is mounted on a main body case 2 upward. The movable head 2
1D is composed of three stages of a movable guide 22, a movable guide 51, and a detection head 23, and a third spring 52 is added. Dmax is L0 + L2 + L3 + L5, Dmin
Is L0, and the height difference is (L2 + L3 + L5), which is sufficiently large.

The first embodiment is a roll gap measuring device in which a single-stage roll gap measuring mechanism and a two-stage roll gap measuring mechanism are combined. The second embodiment is a two-stage roll gap measuring mechanism and a two-stage roll gap measuring mechanism. The third embodiment is a roll gap measuring device provided with a two-stage roll gap measuring mechanism, and the fourth embodiment is a roll gap measuring apparatus having a two-stage roll gap measuring mechanism.
This shows a step-type roll interval measuring mechanism. The roll interval measuring mechanism can have a two-stage, three-stage, four-stage or more multi-stage structure, and the height difference increases as the number of stages increases. As described above, the roll gap measuring mechanism according to the present invention is characterized by a multi-stage structure, and the roll gap measuring device of the present invention is provided with at least one multi-stage roll gap measuring mechanism. The purpose of increasing the height difference can be achieved.

The roll gap measuring apparatus of the present invention is suitable for measuring the roll gap of a guide roll of a continuous casting facility. However, the roll gap measuring apparatus is not limited to this facility. Can be used for measurement.

[0025]

According to the present invention, the following effects are exhibited by the above configuration. Claim 1 is a roll gap measuring device for measuring a roll gap by moving between guide rolls arranged in pairs, wherein at least one movable head that moves by contacting the guide roll and a tip of the movable head. And a displacement gauge for detecting the displacement of the detection head, and the movable head has a multi-stage structure.

Since the movable head has multiple stages, a large roll interval can be measured. Furthermore, since there are multiple stages, the length of the detection head at the tip can be reduced. A short detection head can sufficiently withstand an impact or an external force. Since it is not necessary to replace the detection head, the roll interval measuring operation can be efficiently performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a roll distance measuring device (first embodiment) according to the present invention.

FIG. 2 is a plan view of a dummy bar on which the roll distance measuring device of the present invention is mounted.

FIG. 3 is a diagram showing the maximum height of the roll distance measuring device according to the present invention.

FIG. 4 is a diagram showing a minimum height of the roll distance measuring device according to the present invention.

FIG. 5 is a cross-sectional view of a roll distance measuring device (second embodiment) according to the present invention.

FIG. 6 is a sectional view of a roll distance measuring device (third embodiment) according to the present invention.

FIG. 7 is a cross-sectional view of a roll distance measuring device (fourth embodiment) according to the present invention.

FIG. 8 is a cross-sectional view of a conventional roll distance measuring device.

[Explanation of symbols]

1, 1B, 1C, 1D: Roll spacing measuring device, 2: Body case, 20: Two-stage roll spacing measuring mechanism, 21, 21
D: movable head, 22, 22D: movable guide, 23: detection head, 26: displacement meter.

Claims (1)

[Claims] 1. A roll gap measuring device for measuring a roll gap by moving between guide rolls arranged in pairs, said roll gap measuring apparatus comprising at least one roll moving by contacting a guide roll. A roll gap measuring device comprising a movable head and a displacement meter for detecting a displacement of a detection head at a tip of the movable head, wherein the movable head has a multi-stage structure.