JP2513380B2 - Method and apparatus for measuring web deviation of H-section steel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring web deviation of H-section steel, and more particularly, to a method for accurately measuring the web deviation of H-section steel when manufacturing H-section steel with a constant outer method. The present invention relates to a method and apparatus for measuring a web bias amount that can be measured.

[0002]

2. Description of the Related Art H-section steel is a general-purpose steel material that is widely used in a wide range of fields including construction-related fields. This H-section steel manufacturing method is roughly classified into a welding method and a rolling method.
In recent years, the rolling method has been mainly used from the viewpoint of reducing the manufacturing cost and improving the quality. Therefore, the dimensional accuracy of each section of the manufactured H-section steel is greatly influenced by each rolling process.

Conventionally, when manufacturing H-section steel by rolling, the thickness and width of each of the flange and the web are constrained during rolling due to the structure of the rolling mill, so that it is relatively easy to ensure dimensional accuracy. However, since the upper end surface and the lower end surface of the flange are not constrained during rolling, web deviation, which is a phenomenon in which the web connecting portion is displaced in either the upper or lower direction with respect to the center of the flange in the width direction, is likely to occur.

Therefore, in order to quantitatively grasp how much the web is biased during rolling and take appropriate measures at an early stage, for example, appropriately changing the biting position into the rolling mill, the H-section steel Various techniques have been proposed for accurately measuring the web position of the sheet during rolling.

For example, in Japanese Patent Laid-Open No. 57-67810, there is shown in FIG.
As shown in FIG. 1, one radiation type web thickness gauge 10, one optical web top surface position gauge 11 and one optical flange top surface position gauge 9 are installed near the H-section steel 2 being rolled, that is, near the rolling line. , The web thickness b, the web upper surface position m, and the flange upper end surface position n measured by each of these measuring instruments.
Has proposed an H-section steel web position measuring device capable of calculating the web position d of the H-section steel 2 by the following equation d = mn + b / 2. In FIG. 10, 12 is a laser projector having a laser projecting point, 13 is a spot position detector having a laser receiving point, 14 is a radiation source, 15 is a signal processing device, 16 is a flange upper end surface detector, and 17 is Each of the arithmetic processing units 18 further indicates a display.

[0006]

However, this Japanese Laid-Open Patent Publication No.
In the web position measuring device proposed by the Japanese Patent Publication No.-67810, the H-section steel to be measured is hot when measuring the web deviation amount during rolling or conveyance of the H-section steel.
Also, due to the fact that the vehicle is running, there are the following measurement problems. That is, since it is used in a poor measurement environment that is strongly affected by water vapor, water droplets, heat, etc., measurement errors are likely to occur, and the H-shaped steel being conveyed may have vertical vibration, twist, tilt, etc. Therefore, measurement error of the upper end face position of the flange is likely to occur. The web position measuring device hardly considers the measures for the above two points. Therefore, the measurement environment is particularly good, for example, the amount of water vapor is small,
And under the special condition that the dimension of each part of the H-section steel 2 can be accurately measured by stopping the H-section steel at a certain moment, H
It is not possible to accurately measure the web deviation amount of shaped steel.

Further, in recent years, the dimensional accuracy of the H-section steel has become more strictly required, but normally,
The degree of web deviation generated in the H-section steel is not constant in the left and right flanges. Therefore, when the web position measuring device is used, a measurement error occurs naturally because there is only one measurement point. In the past, even if such a measurement error was included, it was not a serious problem.
Shaped steel is also required to have high dimensional accuracy, and it is necessary to reduce this measurement error as much as possible.

As described above, since the web position measuring device has a lot of disturbances in measurement, it is impossible to measure the web deviation amount with high accuracy unless these disturbances can be eliminated or suppressed. Moreover, it is not taken into consideration that the web deviation is different in degree between the left and right flanges.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for measuring the amount of web deviation of H-section steel, which solves the problems of the above-mentioned prior art. A web deviation amount measuring method and apparatus capable of accurately measuring the web deviation amount of a H-section steel during manufacturing of a section steel online and during transportation (running) during rolling of the H-section steel. To provide.

[0010]

Means for Solving the Problems The present inventors have completed the present invention as a result of various studies to solve the above problems. Here, the gist of the present invention is a method of measuring the amount of web deviation of H-section steel during rolling, which comprises two sets of flange and web upper positions and the remaining two sets of flange and web lower positions. And were measured simultaneously, and from these measured values and the inclination of the web obtained from the positions of the two points of the web, 4
A web deviation amount measuring method for H-section steel, characterized in that a web deviation amount of two flanges is calculated by calculating a distance between a flange end surface and a web surface of a set, or a web deviation amount of H-section steel is rolled. A method of measuring inside, wherein two sets of flange and web top positions and two flange bottom positions are simultaneously measured, and these measurement values and web thickness measurement values or target values and web two-point positions are measured. It is a method of measuring the amount of web deviation of the H-section steel, characterized in that the distance between the four flange end faces and the web surface is calculated from the inclination of the web obtained from the above, and the amount of web deviation of the two flanges is obtained.

Further, from another aspect, there is provided a device for measuring the web deviation amount of the H-section steel, which is installed in the H-section steel rolling line, and (i) extends in a direction intersecting with the rolling line. Two sets of flanges and a web upper position measuring device, which are arranged to be vertically movable on the upper arm part and measure two positions of the flange and the web upper position, and (ii) a lower arm juxtaposed below the upper arm part. Two flanges and a web lower position measuring device which are installed in the section to measure two sets of flange and web lower position, and (iii) the flange and the web upper position measured by the flange and web upper position measuring device, A calculator for calculating the web center deviation amount from the flange and web lower position measured by the flange and web lower position measuring device and the web inclination obtained from the positions of two web points. A web deflection measuring device of H-beams, characterized in that it comprises in combination a.

According to another aspect of the present invention, there is provided a device for measuring a web deviation amount of the H-section steel, which is installed in the H-section steel rolling line, and (i) intersects with the rolling line. A pair of flanges and a web upper position measuring device for measuring the upper position of the flange and two sets of the flanges, which are arranged so as to be able to move up and down on the upper arm portion extending in the direction, and (ii) are arranged side by side below the upper arm portion. Installed on the lower arm part, and two flange lower position measuring devices for measuring two lower flange positions,
(iii) The flange and the web upper position measured by the flange and the web upper position measuring device, the flange lower position measured by the flange lower position measuring device, the measured value or target value of the web thickness, and the web 2
It is an apparatus for measuring the amount of web deviation of H-section steel, characterized in that it has a combination with a calculator for calculating the amount of web center deviation from the inclination of the web obtained from the position of a point.

In the present invention, it is preferable that the flange and the web upper position measuring device be composed of two sets of distance meters which are arranged apart from each other in a direction intersecting with the rolling line. In the above invention, "during rolling"
Includes the time immediately after rolling is completed.

[0014]

The operation of the present invention will be described in detail below. First, the H-shaped steel web deviation amount measuring device according to the present invention is
It has an upper arm portion extending in a direction intersecting with the rolling line and a lower arm portion arranged in parallel with the upper arm portion. The upper arm portion and the lower arm portion are constituted by, for example, a C-shaped frame.

The shapes of the upper arm portion, the lower arm portion and the C-shaped frame are not limited at all. It suffices that the upper arm portion and the lower arm portion have a sufficient length to cover the upper side and the lower side of the rolling line. In addition, the C-shaped frame,
It is desirable that the device is installed so as to be reciprocable in the direction intersecting with the rolling line because the flange end can be scanned and the device body can be retracted from the rolling line when non-measurement is performed. Next, on the upper arm portion, two sets of left and right flanges and two flange and web upper position measuring devices for measuring the upper position of the web are provided so as to be reciprocally movable in the direction crossing the rolling line and vertically movable.

The flange and web upper position measuring device is a device for measuring the distance from a certain reference height to the flange upper part and the web upper part. For example, a scanning range finder for measuring while scanning in the web width direction, It may be configured by two sets of laser distance meters arranged so as to be able to measure the upper end portion of the flange and the root portion of the web at the same time, and are separated from each other by a predetermined distance in the direction intersecting with the rolling line. When the laser range finder is used, the reciprocating range is preferably close to the flange, and the reciprocating range is preferably small because the cycle time required for measurement can be shortened.

As described above, two flange and web top position measuring devices are installed. Since the web deviation amount is different between the left and right flanges, the measurement error is reduced by measuring each web deviation amount. In addition, by simultaneously measuring the upper position of the web at two locations, the inclination of the H-section steel during conveyance is obtained, and as described later, the distance between the flange end face and the web face in the direction orthogonal to the web is determined. This is to ask.

As described above, the position measuring device for measuring the position of the flange and the upper part of the web is reciprocally installed so as to scan the upper end of the flange and the upper part of the web, and is installed so that it can be moved up and down. In order to reduce the measurement error by making the measurement as close as possible to the measurement part, and keeping it constantly lowered to the measurement position, the shape of the H-shaped steel during transportation, such as nose bending, may be defective. This is because it will be collided and damaged by the above, so that it should be retracted to the upper standby position where collision does not occur during non-measurement. It should be noted that the flange and the web upper position measuring device can be installed reciprocally and ascendably and descendably in the direction intersecting with the rolling line in this manner by known means, and the specific means is not limited. . In particular, the reciprocating installation in the direction intersecting with the rolling line may be achieved by reciprocating the apparatus body, but in order to reduce the time required for reciprocating movement and reduce the measurement cycle time, , C
It is desirable that the flange and the web upper position measuring device be reciprocally mounted on the mold frame.

Further, two flanges on the left and right and two flange lower web position measuring devices for measuring lower web positions are arranged on the lower arm. The flange and web lower position measuring device is a device for measuring the distance from a certain reference height to the flange lower part and the web lower part. For example, a CCD camera method (necessary from the side direction and the bottom direction of the H-section steel during traveling) It is possible to exemplify a means for measuring with a backlight, or a means for measuring with a laser range finder installed under the traveling H-section steel by taking measures against measurement environment.

Unlike the above-described flange and web upper position measuring device, the flange and web lower position measuring device does not need to be installed so as to be reciprocally and vertically movable in a direction intersecting with the rolling line, and is a measurement object. You may fix and install in the said lower arm part which is the lower vicinity of H-section steel. H
This is because there is no risk of interference because a rolling line is provided between the shaped steel and the flange and web lower position measuring device.

Further, in the web deviation amount measuring device according to the present invention, the flange and the web upper position measured by the flange and the web upper position measuring device, and the flange and the web lower position measuring device by the flange and the web lower position measuring device, A calculator for calculating the web center deviation amount is provided from the web lower position and the web inclination obtained from the positions of the two webs. The arithmetic unit may be a publicly known unit and does not need any limitation.

In this way, in the web deviation measuring device according to the present invention, the flange and the web position at four points are measured in principle, but the web deviation may be obtained by means other than this means. . That is, of the four web measuring parts, two web lower positions are relatively dark parts and measurement is not easy. Therefore, by measuring the web thickness instead of measuring this part, the web deviation amount can be calculated. You may calculate. The web thickness is a part where a predetermined dimensional accuracy can be obtained relatively easily by rolling,
Either an actually measured value or a target value may be used.

Next, the means for measuring the web deviation amount from these measured values will be described. FIG. 3 is a schematic explanatory view for explaining the measurement principle of the web deviation amount measuring apparatus according to the present invention. That is, in the present invention, nu1, mu1, nb1, and mb1 are simultaneously measured in the H-section steel being conveyed and running, and further nu2, mu2, nb2, and mb2 are simultaneously measured, and from these results, the web The bias amount is calculated based on the following formula. The distance in the web width direction between the points A1 and b1 of the H-section steel is a constant value determined by the H-section steel dimension.

Web deviation of left flange; ΔL1 = (su1−sb1) / 2 ... where su1 = mu1−nu1 sb1 = mb1−nb1 Web deviation of right flange; ΔL2 = (su2-sb2 ) / 2 ... Here, su2 = mu2-nu2 sb2 = mb2-nb2 Furthermore, not only vertical vibration occurs but also twist occurs in the H-section steel during running. In order to reduce this measurement error, when the A1 point and the b1 point in FIG. 3 are measured by one flange and web deviation amount measuring device, at the same time, the measurement obtained by the other flange and web deviation amount measuring device. The inclination θ with respect to the horizontal line of the web is obtained from the value of the value bx point, and the accuracy is improved by correcting ΔL1 and ΔL2. That is, ΔL1 ′ = ΔL1 / cosθ ... ΔL2 ′ = ΔL2 / cosθ ... Thus, the web deviation amount measuring apparatus according to the present invention is
Since the difference in the shapes of the flange and the left and right flanges of the web is taken into consideration, the measurement can be performed with high dimensional accuracy, the positions of two points on the left and right of the web can be measured at the same time, and the deviations of the left and right webs respectively. The inherent error can be canceled out by using the difference in the measurement values of the rangefinders. Further, since the web can be regarded as a straight line, the inclination can be corrected by measuring two points on the web at the same time, and an accurate value can be obtained. Also,
The correction can be performed by taking into consideration the inclination of the web during traveling, which occurs when the transportation speed of the H-section steel is high.

In this calculation, since the end face of the flange is actually rounded, the maximum value of (mu1-nu1) obtained during scanning of the laser rangefinder is input as su1. The same applies to the other sb1, su2, and sb2. Therefore, by performing such a calculation by a calculator, the web deviation amount measuring device according to the present invention can accurately measure the web deviation amount generated in the H-section steel after rolling.

Further, as described above, when the web thickness is used instead of measuring the lower position of the web, as shown in FIG. 5, which is a schematic explanatory view showing the connection state of the control system, during conveyance traveling. In the H-section steel, the web deviation amount is calculated as follows from the results obtained by the means for simultaneously measuring nu1, mu1, nb1 and the means for simultaneously measuring nu2, mu2, nb2, and the web thickness b. . The web thickness b
Since the manufacturing accuracy is superior to the web bias amount, the manufacturing target value may be used instead of the actual measurement value.

Web deviation amount of left flange; ΔL1 = (su1-sb1) / 2 ... where su1 = mu1-nu1 sb1 = L-mu1-nb1- b Web deviation amount of right flange; ΔL2 = (Su2-sb2) / 2 ... Here, su2 = mu2-nu2 sb2 = L-mu2-nb2- b That is, according to the web deviation amount measuring apparatus of the present invention, the rolling of H-section steel is performed. It is possible to measure the amount of web deviation that occurs at that time online and during the transportation (running) of H-section steel during rolling. Based on this measurement result, it is possible to adjust the biting position in the rolling mill, etc. It is possible to control so that the web bias is eliminated or reduced.

Further, the present invention will be described in detail with reference to the embodiments embodied by the accompanying drawings, but this is merely an example of the present invention, and the present invention is not limited thereby.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic explanatory view showing one embodiment of a web deviation amount measuring apparatus according to the present invention. In the web deviation amount measuring apparatus according to the present invention, a C-shaped frame 1 constituting the whole is reciprocally installed by an appropriate means in a direction orthogonal to a rolling line 3 of an H-shaped steel 2 (horizontal direction in the drawing). . In the embodiment shown in FIG. 1, wheels 4 and a drive device 5 for driving the wheels 4 are provided on the bottom of the C-shaped frame 1.

The C-shaped frame 1 has an upper arm portion 6 extending in a direction orthogonal to the rolling line 3 and a lower arm portion 7 arranged side by side below the upper arm portion 6. The upper arm portion 6 and the lower arm portion 7 fix various measuring devices described later.
It is for holding. Therefore, any shape may be used as long as the above conditions can be satisfied, and no limitation is required.

The upper arm portion 6 is provided with flange and web upper position measuring devices 8 and 8 which can be raised and lowered and can be reciprocated in the left and right directions toward the drawing. It stands by and is lowered to the measurement position during measurement. The standby position was set at a position where it would not collide with a shape defect such as a nose bend that occurs in the H-shaped steel having the maximum dimension flowing through the line, and the measurement position was set at a position where distance measurement could be performed with high accuracy.

In this embodiment, a servomotor is used as a mechanism for moving up and down, and a servomotor is also used as a mechanism that can reciprocate in the left-right direction in the drawing, and an AC motor is used as a mechanism for moving the C-shaped frame. The lower arm 7 is provided with flange and web lower position measuring devices 9, 9.

FIG. 2 is a schematic explanatory view showing a control system of the apparatus shown in FIG. 1, in which the end position of the H-shaped steel 2 (nu1, nu in the figure).
2, nb1 and nb2) and the position of the web in the vicinity thereof (indicated as mu1, mu2, mb1 and mb2 in the figure) are flange and web upper position measuring devices 8 and 8 and flange and web lower position measuring device 9 , 9 and input this to the arithmetic unit, nu1 and mu1, nu2 and mu2,
The maximum value of the difference between nb1 and mb1 and nb2 and mb2 was calculated, and the web deviation amount was calculated using the above equations and equations and equations.

FIG. 4 shows an example of the control system of the arithmetic unit. In this example, the data from each measuring device, the data from the servo motor and encoder of the flange and web upper position measuring device, and the C-shaped frame are driven.
The data from the AC motor is finally sent to the data processing device to process the data. The functions of the sequencer in the figure are the movement control of the C-shaped frame, the movement control of each measuring device, and the movement setting of each measuring device to each measuring position. The breakdown of the servo motor is the laser rangefinder in each measuring device. It is for adjusting the distance, adjusting the measurement position of each upper measuring device, and moving each measuring device.

Using this apparatus according to the present invention, the amount of web deviation was measured by substituting the measurement data into the above equations and equations and equations. The number of scans during measurement was 7, and the inclination of the flange calculated during each measurement was as shown in Table 1.

[0036]

[Table 1]

The measurement results are shown in FIGS. 6 and 7. 6 shows D / S (drive side, left flange side) center deviation error for each number of scans, and FIG. 7 shows W / S (workside size).
The error of the center deviation is shown for each number of scans. In both figures, ◯ indicates an example in which the flange inclination is not corrected, and ● indicates an example in which the correction is performed. The error of the central deviation measured by the present invention is D / S
Is +0.4 mm to -1.2 mm, w / S is +1 mm to-
1 mm, especially when the flange inclination is corrected, D / S becomes constant at about -0.2 mm, and W / S is about-.
It became constant at 0.1 mm.

On the other hand, a case where the web deviation of the H-section steel is measured by the conventional apparatus shown in FIG. 10 is shown as a comparative example. In this case, the vertical vibration generated in the H-shaped steel during conveyance is extremely large from several mm to about 10 mm as shown in FIG. 8, so ignore this and measure the web deviation with high accuracy. Was impossible. Therefore, the effectiveness of the device according to the present invention is clear.

FIG. 9 shows data obtained by measuring four points in the lengthwise direction of the H-section steel four times each. As is apparent from FIG. 9, the conventional apparatus causes an extremely large measurement error, which is +1.7 mm at the maximum. in this way,
According to the present invention, the measurement accuracy can be significantly improved as compared with the conventional web bias amount measuring device.

[0040]

As described in detail above, according to the present invention,
It has become possible to provide a web deviation amount measuring method and device capable of highly accurately measuring the web deviation amount of the H-section steel when manufacturing the H-section steel whose outer method is constant. The significance of the present invention having such an effect is extremely remarkable.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of a web deviation amount measuring device according to the present invention.

FIG. 2 is a schematic explanatory view showing a control system of the apparatus shown in FIG.

FIG. 3 is a schematic explanatory view used to show a measurement principle of the apparatus shown in FIG.

FIG. 4 is a schematic explanatory diagram showing a control example of a computing unit according to the present invention.

FIG. 5 is a schematic explanatory view showing a control system of another web deviation amount measuring apparatus according to the present invention.

FIG. 6 is a graph showing an error of D / S center deviation in the example of the present invention.

FIG. 7 is a graph showing an error of W / S center deviation in the example of the present invention.

FIG. 8 is a graph showing vertical vibrations generated in an H-section steel in a conventional rolling line.

FIG. 9 shows the same 4 in the conventional H-section steel rolling line.
It is a graph which shows the measurement error when measuring a point 4 times.

FIG. 10 is a schematic explanatory view showing a conventional web deviation amount measuring device for H-section steel.

[Explanation of symbols]

1: C-shaped frame 2: H-shaped steel 3: Rolling line 4: Car 5: Drive device 6: Upper arm part 7: Lower arm part 8: Flange and web upper position measuring device 9: Flange and web lower position measuring device 10:
Web thickness gauge 11: Optical web top surface position gauge 12: Laser projector 13: Laser receiver 14: Radiation source 15: Signal processing device 16: Flange top surface detector 17: Arithmetic processing device 18: Display

 ─────────────────────────────────────────────────── --- Continuation of front page (56) References JP-A-4-213014 (JP, A) JP-A-57-67810 (JP, A) JP-A-49-64457 (JP, A) JP-A-56- 79202 (JP, A) JP 63-191014 (JP, A) JP 48-26754 (JP, Y1)

Claims (5)

(57) [Claims] 1. A method for measuring the amount of web deviation of H-section steel during rolling, which comprises simultaneously measuring two sets of flange and upper position of the web, and the remaining two sets of flange and lower position of the web. Of the H-section steel, characterized in that four sets of flange end faces to web face distances are calculated from the measured values of the above and the web inclinations obtained from the positions of the two webs to obtain the web deviation amounts of the two flanges. Web bias measurement method. 2. A method for measuring a web deviation amount of H-section steel during rolling, comprising simultaneously measuring two sets of a flange and a web upper position and two flange lower positions, and measuring these values and the web. Thickness measurement or target value and web 2
A method for measuring the amount of web deviation of H-section steel, characterized in that the distance between the four flange end faces and the web surface is calculated from the inclination of the web obtained from the position of the point to obtain the amount of web deviation of the two flanges. . 3. A device for measuring a web deviation amount of H-section steel, which is installed in a H-section steel rolling line, and comprises (i) lifting and lowering on an upper arm portion extending in a direction intersecting with the rolling line. Two sets of flanges and a web top position measuring device which are freely arranged and measure two sets of flange and web top position,
(ii) It is installed on the lower arm arranged in parallel below the upper arm and measures the positions of two sets of flanges and the lower part of the web 2
Flange and web bottom position measuring device, (iii)
From the flange and the web upper position measured by the flange and the web upper position measuring device, the flange and the web lower position measured by the flange and the web lower position measuring device, and the web inclination obtained from the position of two webs. A web deviation measuring device for H-section steel, characterized in that it has a combination with a calculator for calculating the web center deviation. 4. A device for measuring a web deviation amount of H-section steel, which is installed in an H-section steel rolling line, and comprises (i) lifting and lowering on an upper arm portion extending in a direction intersecting with the rolling line. Two sets of flanges and a web top position measuring device which are freely arranged and measure two sets of flange and web top position,
(ii) Two flange lower position measuring devices which are installed on the lower arm parts arranged side by side below the upper arm part and measure two lower flange position positions, and (iii) the flange and web upper position measuring devices. From the flange and web upper position measured by, the flange lower position measured by the flange lower position measuring device, the measured value or target value of the web thickness and the inclination of the web obtained from the positions of the two webs, A web deviation measuring device for H-section steel, characterized in that it has a combination with a calculator for calculating the web center deviation. 5. The H-section steel according to claim 3 or 4, wherein the flange and the web upper position measuring device are composed of two sets of distance meters which are spaced apart in a direction intersecting with a rolling line. Web bias measuring device.