JPH0460405A - General-purpose sensor between stands - Google Patents

Abstract

PURPOSE:To simultaneously measure various shapes and sizes comparatively easily even in a narrow place by placing a one-dimensional laser range finder on either an upper or a lower part of the center of a material to be rolled and two-dimensional laser range finders on the same side at both ends. CONSTITUTION:A one-dimensional laser range finder S0 is placed on an upper (or lower) part of the widthwise center of a material P to be rolled and two-dimensional laser range finders S1, S2 are placed on the upper (or lower) part of both ends of the material P, respectively, while the range finder S0 measures a distance l0 and the range finders S1, S2 measure distances l1, l2 and also scanin a widthwise direction. Since the one-dimensional and two-dimensional laser range finders S0, S1, S2 are provided at the center and both ends on the same side, a distance to the surface of the material P to be rolled and edge positions of the material P can be detected so that a width, amount of meandering, camber, a height position of the material P, stretches in a body and sides, their steepness, etc., can be measured. Further by adding one- dimensional and two-dimensional laser range finders similarly to the opposite side, a thickness, crown and wedge, etc., of plates can be measured.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a sensor for measuring the shape and various dimensions of a rolled material during rolling. The shape of the material to be rolled, the width of the material,
This invention relates to a multipurpose sensor for simultaneously measuring plate thickness, etc.

<Conventional technology> When rolling a steel strip with a hot continuous rolling mill, the shape such as camber and flatness, and various dimensions such as plate width, plate thickness, and crown greatly affect the quality of the rolled steel strip. Therefore, the rolling device and roll bender are controlled during rolling to maintain the desired accuracy.

For this purpose, it is necessary to measure the shape and dimensions of the rolled material during rolling.

For example, when controlling the plate thickness, measure the plate thickness with an X-ray thickness gauge installed on the exit side of the rolling mill and find the deviation from the target plate thickness.
Roll the plate thickness deviation! The so-called BISRA type AGC, which controls the rolling reduction by feeding back to the stand (hereinafter referred to as the stand), is often used. Also, for the board width, etc., board width meters with image sensors, meandering sensors, camber meters, etc. are used, and the band It helps maintain the quality of steel.

Some of these sensors, such as board width meters, meandering sensors, and camber meters, are used for the same purpose, but they can also measure different dimensions, for example, board width and thickness at the same time. The reality is that there is no such thing, and individual sensors are used.

<Problem to be solved by the invention> However, in recent years, quality requirements for steel strips have increased, and prompt control has become necessary.As many of these sensors as possible must be installed on the entrance or exit side of the same stand, and at the same time various feed There is a demand for forward and feedback control.

However, as mentioned above, these sensors are installed individually, so in order to install them between the same stands, it is necessary to overcome space constraints in a narrow environment where many devices are installed. In the end, we were able to install only the minimum number of sensors necessary.

An object of the present invention is to overcome the above-mentioned problems of the conventional technology and to provide an inter-stand multipurpose sensor that can measure various shapes and dimensions of a rolled material at the same time, even in a narrow space between the stands, in a comparatively eight-way manner. shall be.

<Means for Solving the Problems> Firstly, the present invention provides an inter-stand multipurpose sensor installed between the stans 1' of a continuous hot rolling mill, the sensor being installed either above or below the central part in the width direction of a rolled material. The one-dimensional laser distance meter installed on one side is the same as the one-dimensional laser distance meter installed on each side of the rolled material. Second, one-dimensional laser range finders installed above and below the center of the rolled material in the width direction, and two-dimensional laser range finders installed at both ends of the rolled material. By composing a two-dimensional laser distance meter installed on one side of the upper and lower sides of each section and a one-dimensional or two-dimensional laser distance meter installed on the other side, the problems of the conventional technology can be overcome, and furthermore, the problem of the conventional technology can be overcome. By making the laser distance needles installed at both ends of the material movable in the width direction of the material to be rolled, it was possible to obtain the -layer effect.

<Function> The inter-stand multipurpose sensor of the present invention includes a one-dimensional laser distance meter on one side of the upper and lower sides of the rolled material, a one-dimensional laser distance meter at the center in the width direction of the rolled material, and a two-dimensional laser distance meter at both ends of the rolled material. By installing a meter, it is possible to detect the distance to the surface of the rolled material and the edge position of the rolled material, and it is possible to detect the strip width, meandering amount, camber, height W (looper height) of the rolled material, belly elongation, Elongation of the ears, steepness of these, etc. can be measured.

In addition to the above, one-dimensional laser distance j! By installing one total and one-dimensional or two-dimensional laser rangefinders on both sides, it becomes possible to measure plate thickness, plate crown, plate wedge, etc.

Furthermore, a laser distance 8 installed at the side end of the rolled material
By making the roller 1 movable in the width direction of the sheet, it is possible to cope with changes in the width of the material to be rolled, and particularly when the width of the material to be rolled changes significantly, measurement accuracy can be improved.

<Example> The figures show an example of the present invention. Figure 1 is an explanatory diagram of the measurement method when a laser distance meter is installed only on the top of the rolled material, and Figure 2
The figure is an explanatory diagram of the measurement method when the laser distance meter is installed both above and below the rolled material. Figures 3 and 4 are the front view of the moving a structure of the laser distance meter installed at the end of the rolled material. In the figure, the fifth
The figure is a sectional view.

In Fig. 1, 1
A dimensional laser distance meter S, and a two-dimensional laser distance meter S, , S, are installed above both ends of the rolled material P, respectively. However, these laser distance meters Ss, S+, St
may be placed below the rolled material.

Here, the one-dimensional laser distance meter 30 is the distance! , and two-dimensional laser distance meter S, ,S
, can measure the distances i1 and l and can scan in the board width direction. 2W is the scanning range of the two-dimensional laser range finders S1 and S2, and Wo is the scanning range of the two-dimensional laser rangefinders S1 and S2.
The distance Lits+, the interval of S, W is the measurement range w=wa
+2W, where W is the plate width. Also, ΔWI, Δ
W is the distance between the outer ends m, n of the measurement range and the plate width edges m', n' of the material P to be rolled.

A case in which various dimensions are measured using a sensor configured in this manner will be described.

(1) Measurement of plate width W2 w p = w @ + 2 W * (ΔW, to 18 W) = W-(ΔW, (-ΔW,) In this case, the scanning range W is the distance M1., lx Although they change due to fluctuations, since the distances affil and ffi! have been measured, they can be corrected, and ΔW5 and ΔW2 can also be corrected in the same way.

Note that temporary edges m' and n' are detected when the measured distance is 2.
This is possible by finding points that change drastically.

(2) Measurement of meandering amount ΔX ΔX−ΔWl−ΔW.

(3) Measurement of camber The camber can be measured by tracking changes in the meandering amount ΔX in response to the amount of movement of the material to be rolled.

(4) Measurement of the height l of the plate P to be rolled 1,=1° In this case, the value at the center of the plate to be rolled was used as a representative value, but an average value may be used if necessary.

Furthermore, this height! is used to control the height of the looper during sheet threading.

(5) Measurement of flatness δ δ-(J!+ +1g)/2 1! *(6) Belly stretch・
Measurement of ear elongation and steepness For belly elongation, distance sI! l,
In case of ear elongation, distance M1. , It can be measured by monitoring changes in each of them in correspondence with the amount of movement of the rolled material, and of course it is also possible to know the steepness.

Here, the amount of movement of the material to be rolled P can be measured by, for example, installing a laser Doppler velocimeter, or a known method of determining it from the rotational speed of the rolling rolls can also be used.

Next, referring to FIG. 2, in this case, one-dimensional laser distances am+s+, S
ll, S+Z installed.

In addition, the laser distance meter Ss, S++, Sll, sex is 2
A dimensional laser rangefinder may also be used, especially a laser rangefinder S +
+, 5lffi is when using a two-dimensional laser rangefinder,
When measuring plate width etc. explained in Fig. 1, ΔW1, ΔW,
It can be used as a backup when the measured value shows an abnormality. Further, the sensor not shown in FIG. 2 may be placed upside down without any problem.

The use of the sensor with this configuration will be described below.

(11 Measurement of plate thickness [, 11 = H - (j!, +/!.') H: Distance between upper and lower laser distance meters (2) Measurement of plate crown ΔC ΔC = L * (t, +tz ) / 2L , -11-
(1, +〇+') 1, -H-(f! +fffi') (3) Measurement of temporary wedge ω, ω-=tl Lt As described above, the cross-sectional shape of the rolled material can be measured. However, temporary crowns and plate wedges have temporary edges m' and nr.
For example, it may be defined to measure at a fixed position that is closer to the inside of the rolled material by 50 mm, so in this case or when the strip width changes, laser distance meters S, which are installed at both ends of the rolled material, are used.
S, (and S11, S rt) must be movable in the board width direction.

Figure 3 shows a laser distance meter 5-1S installed at both ends of the rolled material.
, (hereinafter referred to as single laser rangefinder SI, St), but in this example, the central laser rangefinder SO (hereinafter simply referred to as laser rangefinder S) is fixed.
The laser rangefinders S+ and St move in opposite directions with the laser rangefinder S0 as the center.

That is, a fixed block 2 with a laser rangefinder S mounted thereon is fixed inside a slide case l, and a laser rangefinder S
A moving plate 07 3.3' to which + and Sz are attached is movably installed by a screw shaft 4 having threads 5.5' in opposite directions on both sides. And the screw shaft 4 is an electric motor a with a reducer.
Rotationally driven by 16.

Reference numerals 7 and 7 indicate bearings at both ends of the slide case 1, 8 indicates bearings provided in the fixed block 2, 20 indicates a support beam of the slide case 1, and 21 indicates a column thereof.

With this configuration, the laser rangefinders S, , S,
is the screw shaft 4 by driving the electric fi6 with reducer.
, the laser range finder S via the moving blocks 3.3' can be moved symmetrically in the direction of the plate (left-right direction in the figure).

Note that 9 is a pulse transmitter for detecting the current positions of the laser distance meters S1 and S2.

An example of another moving mechanism will be explained with reference to FIG. In this example, the laser distance meters S, , S, are individually movable.

In the figure, the same members as those shown in FIG. 3 are given the same reference numerals, and their explanation will be omitted. In this example, the screw shaft 4.4' is independently driven by the electric reducer Ia 6.6', so that the laser distance meters S, , S can be moved individually. In addition,? ',? ' is a bearing fixed inside the slide case 1. Further, pulse transmitters 9,9' are also provided individually.

In the case of the moving mechanism shown in Fig. 4, the laser distance meter S, , S can follow the meandering and camber of the rolled material, so the measurement accuracy of plate crowns and temporary wedges can be further improved. .

Next, the cross-sectional structure of the moving mechanism will be explained with reference to FIG.

In the figure, the slide case 1 includes a main body 11 and a cover 12.
, are box-shaped by supports 13, 14, assembled by bolts 16 and attached to support beam 20 by bolts 17, respectively. Note that 15 is a guide liner designed to guide the four corners of the moving block 3.3''.

30 is a dust cover, 31 is a compressed air pipe,
Reference numeral 32 denotes a flexible hose, which is attached as necessary to prevent dust from entering the laser distance needle.

Although the laser distance needle installed above the rolled material has been described above, a laser distance needle installed below can also be configured in the same way.

If the laser distance meters S1 and S are configured to be movable in opposite directions with respect to the laser distance meter S as shown in FIG. Even when installed, the support beam becomes a movable frame,
In addition, when installing laser distance needles on both the upper and lower sides, the supporting beam is a C-shaped movable frame, and a drive device is installed to move the frame in the width direction of the rolled material, thereby preventing meandering and camber of the rolled material. It is also possible to make it follow.

As described above, the multi-purpose inter-stand sensor has been configured using a one-dimensional laser range finder and a two-dimensional laser range finder, so the shape, width, thickness, etc. of the material to be rolled can be measured, and the measuring field can be used to measure the rolling machine. It is now possible to calculate the control amount of the rolling device and roll bender and immediately reflect this on the material to be rolled during rolling.

<Effects of the Invention> The inter-stand multipurpose sensor according to the present invention can simultaneously measure the shape and various dimensions of a rolled material during rolling at one location using a laser distance meter, and has a simple structure and occupies less space. Because it is small, it can be easily installed even in narrow spaces between stands.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, and Fig. 1 is an explanatory diagram of the measurement method when a laser distance meter is installed only on the top of the rolled material, and Fig. 2
The figure is an explanatory diagram of the measurement method when the laser distance meter is installed both above and below the rolled material. Figures 3 and 4 are front views of the moving mechanism of the laser distance meter installed at the end of the rolled material. So, the fifth
The figure is a sectional view. Sφ, S,, Syo, S10, S I I, S+t■
...Slide case, 3.Moving block, 6.Electric motor with reducer, ...Laser distance meter, 2.Fixed block, 4.Screw shaft, 9.Pulse transmitter .

Claims (3)

[Claims] (1) An inter-stand multi-purpose sensor installed between the stands of a continuous hot rolling mill, which includes a one-dimensional laser distance meter installed either above or below the center of the rolled material in the width direction;
An inter-stand multipurpose sensor comprising a two-dimensional laser range finder installed on the same side as the one-dimensional laser range finder on each of both ends of a rolled material. (2) An inter-stand multipurpose sensor installed between the stands of a continuous hot rolling mill, which includes a one-dimensional laser distance meter installed above and below the central part in the width direction of the rolled material, and a one-dimensional laser distance meter installed on both sides of the rolled material. An inter-stand multipurpose sensor characterized by comprising a two-dimensional laser distance meter installed on one of the upper and lower sides of each end, and a one-dimensional or two-dimensional laser distance meter installed on the other side. (3) Multi-purpose between stands as set forth in Claims 1 and 2, characterized in that the laser distance meters installed at both ends of the material to be rolled are movable in the width direction of the material to be rolled. sensor.