JPS6340807A - Method and apparatus for measuring flatness - Google Patents

Abstract

PURPOSE:To narrow a measurable plate width significantly, by arranging displacement meters at a specified interval divided in the ongoing direction and across the width of material to be measured to determine the flatness from a difference between detection values as obtained when the displacement meters face a portion of a surface to be measured on the same line across the width thereof. CONSTITUTION:A plate width set with a width gauge 22 is inputted into a control processing section 25 and displacement meters are selected corresponding to the plate width from among those 13-17 on first and second trucks 9 and 10 to be positioned at specified points. For example, in a steel plate with the min. width, a central displacement meter 14 on the first truck 9 and displacement meters 16 and 17 on the second truck 10 are selected and the displacement meter 14 is positioned at the center across the width while the displacement meters 16 and 17 are positioned so as to be l0 in the interval therebetween. In this case, a measurable min. plate width W0 is given by W0=2l1+l0 and becomes narrower by l0 as compared with the conventional apparatus. Detection outputs are outputted to a counter 24 with a control processing section 25 as obtained when the displacement meters 14, 16 and 17 face a portion of a surface to be measured on the same straight line across the width thereof.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to rolled plates such as hot rolled conditioned plates (hereinafter referred to as steel plates).
The present invention relates to a method and apparatus for measuring the flatness of a plate, and in particular to narrowing the measurable plate width.

[Conventional technology]

Generally, the flatness of a steel plate is caused by non-uniform distribution of longitudinal elongation in the width direction of the plate due to rolling. Steepness is an index that quantitatively expresses this flatness, and is expressed by dividing the wave height after rolling by the wave pitch.

As a device for measuring the above-mentioned steepness, conventionally, for example, the 6th
In Figure 0, l is a steel plate as a material to be measured, 2 is a truck, and the truck 2 is placed between the table rollers on the exit side of the final stand of the rolling line in a direction perpendicular to the traveling direction, that is, the plate 1 The cough trolley 2 is arranged so as to be movable in the ``direction''.
5 is installed. This displacement form 3 on both left and right sides,
5 is connected via a threaded drive shaft and a gear, and by rotating this drive shaft, the 11 plates 1 are always equidistant in the width direction from the center displacement shape 4. It is configured so that it can be positioned. Although not shown, the detection outputs from each of the displacement meters 3 to 5 are input to a flatness calculating device that calculates flatness based on the difference between the respective detected values.

In this conventional apparatus, the trolley 2 is positioned so that the center displacement shape 4 is at the center in the width direction of the steel plate 1, and is stopped at this position during the rolling operation. Further, the left and right displacement shapes 3.5 are positioned at a predetermined distance 11 from the edge of the steel plate according to the plate width input by a width meter or the like (not shown). In this way, the distance from each displacement shape 3 to 5 to the surface to be measured is detected at three points in the width direction of the steel plate 1, and each detected value is manually inputted to the flatness calculation device, and the central The flatness at each point of the steel plate 1 is determined from the difference between the detected value from the detector 4 and the detected values from the other detectors 3.5.

[Problem that the invention seeks to solve]

However, the conventional device described above has a problem in that it cannot measure ropes with relatively narrow plate widths. That is, if the distance from the steel plate edge of the left and right displacement gauges 3.5 is I+, and the width of each displacement gauge 3 to 5 is lO, then the minimum measurable plate width W0 is W2 (1° +1+), and in reality there are mechanical constraints due to the displacement meter mount, etc.
W, -2 (1°+!, +α), and in the end Ws>900
m. Therefore, this conventional device cannot measure relatively narrow steel plates of 900 fins or less.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide a method and apparatus capable of measuring the flatness of a material to be measured having a narrow width.

[Means for solving problems]

The first invention of the present application is a flatness measuring method, in which the distance from each displacement shape to the surface to be measured is detected by a plurality of displacement shapes arranged at predetermined intervals in the traveling direction and width direction of the material to be measured. In addition, the flatness is measured based on the difference between each detected value when each displacement shape faces a portion on the same line in the width direction of the surface to be measured.

Further, the second invention of the present application is a flatness measuring device in which a plurality of support carts are arranged at predetermined intervals in the traveling direction of the material to be measured, a displacement type is mounted on each of the support carts, and each of the displacement types is mounted on each of the support carts. The present invention is characterized in that an arithmetic device is provided for determining flatness based on the difference between detected values from the respective displacement shapes when the surface is opposed to a colinear portion in the width direction of the surface to be measured.

(Function) In the flatness measuring method and apparatus according to the present invention, since the displacement shapes are arranged at predetermined intervals in the traveling direction of the material to be measured, the width of each displacement shape is not affected by the width of each displacement shape. The distance in the direction can be narrowed, and as a result, the width of the material to be measured that can be measured can be narrowed.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 and 2 are diagrams for explaining a flatness measuring bag W according to an embodiment of the second invention of the present application.

In the figure, l is a steel plate, 6 is a final finishing stand, 7 is a table roller, and 8 is a roller drive motor. Between the table rollers 7.7, a first cart 9.7 and a second cart 10 are arranged with an interval of L in the steel plate traveling direction, and each of the carts 9. IO is movable in the width direction of the steel plate perpendicular to the traveling direction by means of a truck drive device 11.12.

Displaceable shapes 13 to 15 are mounted on the first truck 9, and the left and right displacement shapes 13 and 15 are connected by a feed device 18 consisting of a feed screw, and from the center displacement shape 14, the plate width They are positioned at equal distances in the direction. Furthermore, two displacement shapes 16 and 17 are mounted on the second truck 10 so as to be movable in the width direction by a feeding device 19.

Further, in FIG. 2 showing the flatness calculation device 20, 21
2 is a speed detector that detects the feeding speed of the adjusting plate 1 based on the rotational speed of the final stand 6 or the table roller 7; 22 is a width meter that sets the width of the mouth plate; and 23 is an amplification of the output from the width meter 22. 24 is a calculator that calculates the flatness of the steel plate 1 based on the detection output from each of the displacement shapes 13 to 17; 25 is a control processing unit that controls the operation of each of these devices; 26.2
Reference numeral 7 denotes a CRT and a plotter.Next, a case will be described in which the flatness measuring method according to an embodiment of the first invention of the present application is carried out using the apparatus of this embodiment.

In the apparatus of this embodiment, first, the board width set by the width gauge 22 is input to the control processing section 25, and the processing section 25 controls the first...
Select the displacement type according to the width of the cough plate from among the displacement shapes 13 to 17 on the second truck 9 and 10, and position it at a predetermined position.For example, in the case of a steel plate with the minimum plate width, the center The displacement shape 14 and the displacement shapes 16 and 17 on the second truck 10 are selected, and as shown in FIG.
The displacement shapes 16, 17 are each positioned such that the axis between them is 10. Then, the minimum measurable board width W in this case is Wo-21,+I1. , which is narrower by 10 compared to the conventional device.

Here, the first. The second bogie 9.10 is LM in the traveling direction, and when comparing the outputs from the displacement type 14, 16, and 17 at the same time, the output of the displacement type 14 is a displacement of 16.17.
This is a signal at a point that is delayed by the amount of time in the rolling direction compared to the output of . Therefore, in this embodiment, the control processing unit 25 controls each displacement type 14. Calculator 24 calculates the detection output when 16.17 faces the same straight line in the width direction of the surface to be measured.
Output to. That is, from the feed rate determined by the speed detector 21 and the above-mentioned distance, the time t0 from when the rope plate l passes over the first truck 9 to when it passes over the first truck 9 is determined, and the displacement shape 14 and the displacement are calculated. 16.17 and input it into the calculator 24 (see Fig. 4). As a result, the calculator 24 calculates the displacement output at the same line in the width direction of the surface to be measured of the adjusting plate 1. The detected output of the displacement type 14 and the detected output of the displacement type 16.17 are compared to calculate the flatness of the corresponding part of the rope plate 1.The flatness that is the result of this calculation is C
It is displayed on the RT 26 and printed out by the block 27.

Furthermore, when measuring the flatness of a relatively wide steel plate, by using the displacement shapes 13 to 15 on the first cart 9, the flatness can be measured in the same manner as the conventional apparatus.

In this example, since the displacement shapes are arranged at a predetermined distance in the advancing direction of the steel plate 1, the interval in the width direction of each displacement shape can be narrowed, and the measurable plate width can be narrowed accordingly. can do.

In the above embodiment, the case where two carts are provided has been described, but in the present invention, three or more carts may be arranged, and by doing so, the measurable plate width can be further narrowed.

FIG. 5 shows an example in which three carts 31 to 33 are arranged, and displacement shapes 34 to 36 are arranged on each cart.

In this case, the displacement shape 35.36 can be set to a spacing 13 narrower than the displacement shape width io, and the minimum measurable plate $ilW o
can be made narrower than in the above embodiment.

〔Effect of the invention〕

As described above, according to the flatness measuring method and apparatus according to the present invention, the displacement shapes are arranged at predetermined intervals in the traveling direction and the width direction of the material to be measured, and each displacement shape is arranged in the width direction of the surface to be measured. Since the flatness is determined by the difference between each detected value when facing the same line part, the widthwise interval between each displacement shape can be narrowed, and the measurable plate width can be significantly narrowed. effective.

[Brief explanation of drawings]

1 to 4 are diagrams for explaining one embodiment of the present invention, in which FIG. 1 is an overall layout diagram of the embodiment device, and FIG.
The figure is a block configuration diagram of the flatness calculation device, FIGS. 3 and 4 are configuration diagrams and displacement signal characteristic diagrams for explaining its operation, and FIG. 5 is a configuration diagram showing a modification of the above embodiment. FIG. 6 is a configuration diagram showing a conventional flatness measuring device. In the figure, 1 is a steel plate (material to be measured), 9.10°31~
33 is a trolley, 13 to 17, 34 to 36 are displacement types, and 20 is a flatness calculating device. Patent applicant Kobe Co., Ltd.? ! ! Steel Works Agent Patent Attorney Tsutomu Shimofu 1st Plan Level 4 Figure 5

Claims (2)

[Claims] (1) Distance from each displacement shape to the surface to be measured by a plurality of displacement shapes arranged at predetermined intervals in the traveling direction of the material to be measured and in the width direction orthogonal to the direction and facing the surface to be measured. A flatness measuring method characterized in that the flatness is determined by the difference between each detected value when each displacement shape faces a portion on the same line in the width direction of a surface to be measured. (2) A plurality of support carts are arranged so as to be movable in the width direction perpendicular to the direction of movement of the material to be measured, at predetermined intervals in the direction of movement of the material to be measured, and facing the surface to be measured. A displacement meter that detects the distance to the measurement surface is mounted so as to be movable in the width direction, the detection output from each displacement meter is input, and each displacement meter faces a portion of the surface to be measured on the same line in the width direction. What is claimed is: 1. A flatness measuring device comprising: a flatness calculation device for determining flatness based on the difference between detected values from the respective displacement shapes.