Method for measuring the shape of section steel and method for manufacturing section steel

Abstract

To provide a shape measuring method of a shape steel capable of improving measurement accuracy of dimensions, and a manufacturing method of the shape steel.SOLUTION: A shape measuring method of a shape steel includes: a cross-sectional profile measuring process for measuring a cross-sectional profile showing a shape of a cross section orthogonal to a longitudinal direction of the shape steel having flanges at both ends of a web by a light section method; and a shape measuring process for measuring a shape of the shape steel by using the cross-sectional profile. The shape measuring process includes a reference position setting process for setting a measurement reference position of a dimension in the cross-sectional profile, and a dimension calculation process for calculating a dimension of a specific portion in the cross-sectional profile with reference to the measurement reference position.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a method for measuring the shape of a sectional steel and a method for manufacturing a sectional steel. [Background technology]

[0002] Conventionally, there are known methods for automatically measuring the dimensions of structural steel. One is to place multiple sensors and automatically measure the material being measured while it is moving, and the other is to scan the material being measured while it is stationary and then perform the automatic measurement.

[0003] Patent document 1 discloses a method for measuring the dimensions of an H-shaped steel using a dimension measuring device consisting of a light source unit that irradiates a predetermined light onto the H-shaped steel, a plurality of line sensors that input reflected light from the H-shaped steel, an edge position detection unit that detects the edge position of the H-shaped steel from the light receiving signals from each line sensor, a plurality of light-wave distance meters that measure the distance to the surface of the H-shaped steel, and a calculation processing unit that inputs measurement signals from the edge position detection units and the light-wave distance meters and calculates the predetermined external dimensions of the H-shaped steel.

[0004] Patent document 2 discloses a method and device for determining the cross-sectional shape of a channel steel by scanning with a laser rangefinder positioned at an angle up, down, left, and right, and determining the cross-sectional shape of the channel steel from the distance data, tilt angle, and position data of the laser rangefinder during scanning, and calculating the dimensions of each part of the channel steel based on this cross-sectional shape. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 06-281429 [Patent Document 2] JP 2007-240303 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the method disclosed in Patent Document 1, the dimension measuring device cannot detect the surface shape of the same cross section in the direction perpendicular to the conveying direction of the H-beam over the entire circumference of the H-beam and over the entire length of the longitudinal direction of the H-beam, and a reference plane in which each dimension of the H-beam is measured is set when calibrating the dimension measuring device. Therefore, when measuring the dimensions of the H-beam with the dimension measuring device, the measurement cross section is tilted and the measurement direction is shifted due to wear of the conveying table that conveys the H-beam or flapping of the H-beam during conveyance, which causes a problem of deterioration in the measurement accuracy of the dimensions, such as the width dimension being measured as being smaller.

[0007] The method disclosed in Patent Document 2 is a dimension calculation method specialized for channel steel, and there is a problem that it cannot be used as it is for dimension measurement of other than channel steel. In addition, in Patent Document 2, a laser range finder is scanned on a stationary channel steel, and a cross-sectional profile of the channel steel is obtained by synthesizing the distance data, the tilt angle of the range finder, the position data during the scan of the range finder, and the like. When calculating the dimensions of each part from this cross-sectional profile, both end edges of the bottom surface of the channel steel are detected, a virtual line is drawn passing through the two points that are the both end edges, and the inclination of the cross-sectional profile is corrected according to the inclination θc of this virtual line, and this inclination correction is a prerequisite for all dimensions to be calculated. At this time, if the detection of both end edges is not performed accurately, the inclination of the virtual line cannot be obtained correctly. As a result, the inclination correction may not be performed well, and large errors may occur in the calculation of the dimensions of each part. In addition, in the measurement, it is necessary to move the laser range finder in the width direction of the channel steel, which causes problems such as time-consuming dimension measurement, and vibration of the laser range finder during movement and measurement errors in the moving position leading to dimensional measurement errors of the channel steel.

[0008] The above-mentioned problems may occur in the same way when measuring the dimensions of a steel section having two bends in a cross section perpendicular to the conveying direction.

[0009] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a method for measuring the shape of structural steel and a method for manufacturing structural steel that can improve the measurement accuracy of dimensions. [Means for solving the problem]

[0010] In order to solve the above-mentioned problems and achieve the object, the method for measuring the shape of a structural steel according to the present invention comprises a cross-sectional profile measurement process for measuring a cross-sectional profile representing the shape of a cross section perpendicular to the longitudinal direction of a structural steel having flanges at both ends of a web by a light cutting method, and a shape measurement process for measuring the shape of the structural steel using the cross-sectional profile, wherein the shape measurement process is characterized by comprising a reference position setting process for setting a measurement reference position for dimensions in the cross-sectional profile, and a dimension calculation process for calculating dimensions of a specific portion in the cross-sectional profile based on the measurement reference position.

[0011] In addition, the shape measuring method for structural steel according to the present invention is characterized in that, in the above-mentioned invention, one or more measurements are carried out as the dimensions of the specific portion, selected from web height, web thickness, flange width, flange thickness, squareness, flange bend, central offset, web warp, and shape of the flange tip.

[0012] In addition, the shape measuring method for structural steel according to the present invention is characterized in that, in the above invention, a reference line is set for the cross-sectional profile from either a first approximation straight line that is approximated from the portion of the top surface of the web excluding the connections with the flanges on both sides of the web, or a second approximation straight line that is approximated from the portion of the bottom surface of the web excluding the connections with the flanges on both sides of the web, or a straight line passing through the center between the first approximation straight line and the second approximation straight line is set as a reference line, and this is used as the measurement reference position.

[0013] In addition, the shape measuring method for structural steel according to the present invention is characterized in that, in measuring the web height, a point where an outer surface of a flange on one side intersects with the reference line in the cross-sectional profile is designated as a first intersection, and a point where an outer surface of a flange on the other side intersects with the reference line is designated as a second intersection, and the distance between the first intersection and the second intersection in the extension direction of the reference line is calculated as the web height.

[0014] In addition, the shape measuring method of the present invention is characterized in that, in measuring the web thickness, a point where an outer surface of one flange and the reference line intersect with respect to the cross-sectional profile is designated as a third intersection, a first straight line perpendicular to the reference line is drawn from the third intersection to a predetermined position on the inside in the width direction of the web portion, a point where the first straight line intersects with the upper surface of the web is designated as a fourth intersection, a point where the first straight line intersects with the lower surface of the web is designated as a fifth intersection, and the distance between the fourth intersection and the fifth intersection in a direction perpendicular to the reference line is calculated as the web thickness.

[0015] In addition, the shape measuring method of structural steel according to the present invention is characterized in that, in measuring the flange width, a second straight line parallel to the reference line and passing through the highest point of the flange portion is drawn on the cross-sectional profile, and a third straight line parallel to the reference line and passing through the lowest point of the flange portion is drawn, and the distance between the second straight line and the third straight line in a direction perpendicular to the reference line is calculated as the flange width.

[0016] In addition, the shape measuring method of the present invention is characterized in that, in measuring the flange width, the point where the reference line intersects with the outer surface of the flange is defined as a sixth intersection point for the cross-sectional profile, a fourth straight line perpendicular to the reference line is drawn at a position a predetermined distance inward in the width direction of the web portion from the sixth intersection point, a seventh intersection point is drawn at a point where the fourth straight line intersects with the underside of the web, a fifth straight line is drawn parallel to the reference line and passing through the seventh intersection point, a sixth straight line is drawn parallel to the reference line and passing through the top point of the flange portion, and the distance between the fifth straight line and the sixth straight line in a direction perpendicular to the reference line is calculated as the flange width.

[0017] In addition, the shape measuring method of a structural steel according to the present invention is characterized in that, in measuring the flange thickness, a seventh straight line is drawn on the cross-sectional profile which is parallel to the reference line and passes through a predetermined position of the flange portion, the point where the flange outer surface of the flange portion and the seventh straight line intersect is defined as an eighth intersection, and the point where the flange inner surface of the flange portion and the seventh straight line intersect is defined as a ninth intersection, and the distance between the eighth intersection and the ninth intersection in the extension direction of the reference line is calculated as the flange thickness.

[0018] In addition, the shape measuring method of the present invention is characterized in that, in measuring the squareness, an eighth straight line perpendicular to the reference line is drawn on the flange outer surface in an area not influenced by the tip shapes of the flange upper end face and the flange lower end face, passing through the outermost point in the extension direction of the reference line, and a ninth straight line perpendicular to the reference line is drawn on the flange outer surface in an area not influenced by the tip shapes of the flange upper end face and the flange lower end face, passing through the innermost point in the extension direction of the reference line, and a distance between the eighth straight line and the ninth straight line in the extension direction of the reference line is calculated as the squareness.

[0019] In addition, the shape measuring method of the present invention is characterized in that, in measuring the flange fold, a point where the flange outer surface intersects with the reference line on the cross-sectional profile is set as a tenth intersection point, an eleventh straight line is drawn on the flange outer surface through a limit point where the influence of the tip shape of the flange upper end surface disappears and perpendicular to the reference line, a twelfth straight line is drawn on the flange outer surface through a limit point where the influence of the tip shape of the flange lower end surface disappears and perpendicular to the reference line, the distance from the tenth intersection point to the eleventh straight line in the extension direction of the reference line is calculated as the flange fold on the flange upper end surface side, and the distance from the tenth intersection point to the twelfth straight line in the extension direction of the reference line is calculated as the flange fold on the flange lower end surface side.

[0020] Furthermore, in the shape measuring method of the present invention, in the measurement of the central deviation, a point where an outer surface of a flange portion intersects with the reference line is defined as an eleventh intersection point, a thirteenth straight line is drawn parallel to the reference line and passing through an uppermost point of the flange portion, a fourteenth straight line is drawn parallel to the reference line and passing through a lowermost point of the flange portion, and a fourteenth straight line is drawn perpendicular to the reference line at an arbitrary position on the inside in the width direction of the web portion a distance in addition to the nominal value of the flange thickness from the eleventh intersection point. The method is characterized in that a straight 15th straight line is drawn, a point where the 15th straight line intersects with the upper surface of the web is defined as a 12th intersection, a point where the 15th straight line intersects with the lower surface of the web is defined as a 13th intersection, a third distance is calculated between the 12th intersection and the 13th straight line in a direction perpendicular to the reference line, a fourth distance is calculated between the 13th intersection and the 14th straight line in a direction perpendicular to the reference line, and the central deviation is measured by multiplying the difference between the third distance and the fourth distance by 1 / 2.

[0021] Furthermore, in the method for measuring the shape of a structural steel according to the present invention, in the above invention, in measuring the web warp, a 16th line and a 17th line perpendicular to the reference line are drawn at two arbitrary positions on the inside in the width direction of the web portion, an arbitrary distance in addition to the nominal value of the flange thickness from the outer surfaces of the flanges on both sides, the points where the 16th line and the 17th line intersect with the web upper surface or the web lower surface, respectively, are designated as a 14th intersection and a 15th intersection, an 18th line is drawn connecting the 14th intersection and the 15th intersection in the extension direction of the reference line, and the maximum distance between the web upper surface or the web lower surface and the 18th line in a direction perpendicular to the reference line is calculated as the web warp.

[0022] In addition, the shape measuring method of a structural steel according to the present invention is characterized in that, in measuring the shape of the flange tip, a 19th straight line extending along the flange outer surface of the flange portion is drawn on the cross-sectional profile, a 20th straight line extending along the flange upper end surface of the flange portion and intersecting the 19th line, a 21st straight line passes through a 16th intersection point where the 19th line and the 20th line intersect, and in a direction dividing the 19th line and the 20th line equiangularly, a point where the 21st line intersects with the flange upper end surface is designated as a 17th intersection point, and the shape of the flange tip is measured by calculating a fifth distance between the 16th intersection point and the 17th intersection point in the extension direction of the 21st straight line.

[0023] Moreover, the method for measuring the shape of a shaped steel according to the present invention is characterized in that, in the above-mentioned invention, the shaped steel is an H-shaped steel or a channel steel.

[0024] Moreover, a manufacturing method of a shaped steel according to the present invention is characterized by comprising a step of measuring the shape of the shaped steel by the above-mentioned shaped steel shape measuring method of the present invention. Effect of the Invention

[0025] The method for measuring the shape of sectional steel and the method for manufacturing sectional steel according to the present invention have the effect of improving the accuracy of dimensional measurement. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a main part of a section steel manufacturing facility equipped with a shape measuring device according to an embodiment. [Diagram 2] FIG. 2 is a block diagram showing an example of a schematic configuration of the shape measuring device according to the embodiment. [Diagram 3] FIG. 3 is a diagram showing an example of the arrangement positions of eight measurement sensors of the shape measuring device according to the embodiment. [Figure 4] FIG. 4 is a diagram showing an example of a schematic configuration of a measurement sensor according to an embodiment. [Diagram 5] FIG. 5 is a diagram showing an example of a cross-sectional profile of an H-shaped steel. [Figure 6] FIG. 6 is a diagram showing an example of a method for setting a reference line in a cross-sectional profile of an H-shaped steel. [Figure 7] FIG. 7 is a diagram showing the measurement logic for the web height of an H-beam. [Figure 8] FIG. 8 is a diagram showing the measurement logic for the web thickness of an H-beam. [Figure 9] FIG. 9 is a diagram showing the measurement logic for the flange width of an H-shaped steel. [Figure 10] FIG. 10 is a diagram showing the measurement logic for the flange thickness of an H-beam. [Figure 11] FIG. 11 is a diagram showing the measurement logic for the perpendicularity of an H-shaped steel. [Figure 12] FIG. 12 is a diagram showing the measurement logic for flange breakage of H-shaped steel. [Figure 13] FIG. 13 is a diagram showing the measurement logic for the center offset of an H-shaped steel. [Figure 14] FIG. 14 is a diagram showing the measurement logic for web warping of an H-section steel. [Figure 15] FIG. 15 is a diagram showing the measurement logic for the shape of the flange tip of an H-shaped steel. [Figure 16] FIG. 16 is a diagram showing an example of a cross-sectional profile of a channel steel. [Figure 17] FIG. 17 is a diagram showing an example of a method for setting a reference line in a cross-sectional profile of a channel steel. [Figure 18] FIG. 18 is a diagram showing the measurement logic for the web height of a channel steel. [Figure 19] FIG. 19 is a diagram showing the measurement logic for the web thickness of a channel steel. [Figure 20] FIG. 20 is a diagram showing the measurement logic for the flange width of a channel steel. [Figure 21] FIG. 21 is a diagram showing the measurement logic for the flange thickness of a channel steel. [Figure 22] FIG. 22 is a diagram showing the measurement logic for the squareness of a channel steel. [Figure 23] FIG. 23 is a diagram showing the measurement logic for the web warp of a channel steel. [Figure 24] FIG. 24 is a diagram showing the measurement logic for the shape of the flange tip of a channel steel. [Diagram 25] FIG. 25 is a diagram in which the difference (dimensional difference) between the dimension measured by the shape measuring device 1 according to the embodiment and the average value of the dimension measured manually five times is plotted for each dimension of the sample test piece. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, an embodiment of a method for measuring the shape of a shaped steel and a method for manufacturing a shaped steel according to the present invention will be described, although the present invention is not limited to the embodiment.

[0028] FIG. 1 is a diagram showing a schematic configuration of a main part of a manufacturing facility 10 for manufacturing shaped steel 2 according to an embodiment. The manufacturing method for shaped steel 2 applied to the manufacturing facility 10 for manufacturing shaped steel 2 according to an embodiment includes a process for measuring the shape of shaped steel 2 having flanges at both ends of a web, such as H-shaped steel and channel steel. In the manufacturing facility 10 for manufacturing shaped steel 2 according to an embodiment, the shaped steel 2 formed into a desired shape by a shaped steel rolling process or the like is inspected for shape, dimensions, etc. in an inspection process using a shape measuring device 1 or the like. In the inspection process of this embodiment, the shape and dimensions of the shaped steel 2 to be inspected are measured by the shape measuring device 1 while the shaped steel 2 to be inspected is transported in the longitudinal direction of the shaped steel 2 by the shaped steel transport device 3. In addition, in the manufacturing facility 10 for manufacturing shaped steel 2 according to an embodiment, there is an inspection floor after the process of measuring the shaped steel by the shape measuring device 1, and an operator makes a final judgment on the shape, dimensions, etc. of the shaped steel 2 based on the measurement results of the shape measuring device 1.

[0029] As shown in Fig. 1, the shaped steel conveying device 3 is a device for conveying the shaped steel 2 along the longitudinal direction. The shaped steel conveying device 3 of this embodiment is provided with a plurality of conveying rollers 31 arranged along the conveying direction, and the shaped steel 2 is supported from below by the plurality of conveying rollers 31, making it possible to convey the shaped steel 2 in the longitudinal direction.

[0030] As shown in FIG. 1, the shaped steel conveying device 3 has a pair of entrance side variable guides 32a, 32b and a pair of exit side variable guides 33a, 33b arranged on the entrance side (upstream side in the conveying direction) and the exit side (downstream side in the conveying direction) of the shape measuring device 1, which face each other in the width direction of the shaped steel 2. That is, the pair of entrance side variable guides 32a, 32b and the pair of exit side variable guides 33a, 33b are arranged to face each other across the shaped steel 2 arranged on the conveying rollers 31. The pair of entrance side variable guides 32a, 32b and the pair of exit side variable guides 33a, 33b are arranged so that their positions can be changed in the width direction perpendicular to the conveying direction of the shaped steel 2. The widthwise positions of the pair of entrance side variable guides 32a, 32b and the pair of exit side variable guides 33a, 33b are changed according to the type and size of the shaped steel 2 conveyed by the shaped steel conveying device 3. As a result, the pair of entrance side variable guides 32a, 32b guide the transport of the shaped steel 2, reducing skewing of the shaped steel 2 and preventing the shaped steel 2 from colliding with the shape measuring device 1, while allowing the shaped steel 2 to pass through the measurement area F (see FIG. 3) of the shape measuring device 1. In addition, the pair of exit side variable guides 33a, 33b guide the transport of the shaped steel 2 after it has passed through the measurement area F of the shape measuring device 1, making it possible to transport the shaped steel 2 to a subsequent process while reducing skewing of the shaped steel 2. In the present invention, by configuring the equipment in this way, it is possible to accurately measure the dimensions of the shaped steel in the middle of being transported in a short time.

[0031] A shape measuring method for a shaped steel 2 applied to the shape measuring device 1 according to the embodiment includes a cross-sectional profile measuring step of measuring a cross-sectional profile representing the shape of a cross section perpendicular to the longitudinal direction (i.e., the conveying direction of the shaped steel 2) of the transported shaped steel 2 by a light-section method, and a shape measuring step of measuring the shape of the shaped steel 2 using the cross-sectional profile. Furthermore, the shape measuring step includes a reference position setting step of setting a measurement reference position for a dimension in the cross-sectional profile, and a dimension calculation step of calculating a dimension of a specific portion in the cross-sectional profile based on the measurement reference position.

[0032] Fig. 2 is a block diagram showing an example of a schematic configuration of the form measuring device 1 according to the embodiment. As shown in Fig. 2, the form measuring device 1 according to the embodiment includes eight measurement sensors 100A-100H which are a plurality of first sensors, an input device 110, a control device 120, a calculation processing device 130 which is a dimension calculation device, a display device 140, and a tilt device 160 which is a rotation device. Note that, although an example in which there are eight measurement sensors 100 which are a plurality of first sensors will be described in this specification, the number of measurement sensors which are a plurality of first sensors is not limited to eight.

[0033] FIG. 3 is a diagram showing an example of the arrangement of eight measurement sensors 100A to 100H of the shape measuring device 1 according to the embodiment. FIG. 3 is a diagram seen from the upstream side in the conveying direction of the shaped steel 2. As shown in FIG. 3, the eight measurement sensors 100A to 100H are supported and arranged on the support member 11 so as to surround the shaped steel 2 being conveyed. In this embodiment, the eight measurement sensors 100A to 100H are arranged in a ring shape on the inner circumference of the support member 11 so as to be symmetrical on the left and right in a cross section perpendicular to the conveying direction of the shaped steel 2 in the shape measuring device 1. In this embodiment, three measurement sensors 100A, 100B, and 100H are arranged above the shaped steel 2 conveyed to the shape measuring device 1, two measurement sensors 100C and 100G are arranged opposite to each other in the width direction of the shaped steel 2 so as to sandwich the shaped steel 2, and three measurement sensors 100D, 100E, and 100F are arranged below the shaped steel 2. When the eight measurement sensors 100A to 100H are located at their home positions, which are their initial positions, the measurement sensor 100A is located at the uppermost position, and the measurement sensor 100E is located at the lowermost position.

[0034] The eight measurement sensors 100A-100H are aligned in the conveying direction of the shaped steel 2 and use an optical cutting method to measure the surface shape in the same cross section in a direction perpendicular to the conveying direction of the shaped steel 2 over the entire circumference of the shaped steel 2. In the shape measuring device 1 according to the embodiment, the surface shape in a predetermined cross section of the shaped steel 2 is measured when the shaped steel 2 passes through a predetermined measurement area F1 surrounded by the eight measurement sensors 100A-100H.

[0035] In addition, the shape measuring device 1 according to the embodiment is configured so that the support member 11 on which the eight measurement sensors 100A to 100H are arranged can be rotated and tilted around the rotation axis AX extending in the conveying direction of the shaped steel 2 by the tilting device 160 (see FIG. 2). In the shape measuring device 1 according to the embodiment, the support member 11 (the eight measurement sensors 100A to 100H) can be rotated and tilted around the rotation axis AX by the tilting device 160 so that the measurement sensor 100A, which is at the top position in the home position, is positioned at a position perpendicular to the web of the shaped steel 2. That is, even when the measurement is performed in a state in which the web surface of the shaped steel is tilted from the horizontal plane due to uneven wear of the conveying roller 31 that conveys the shaped steel or a defective shape of the shaped steel to be measured, the measurement can be performed from a direction perpendicular to the web surface for some of the measurement sensors by adjusting the rotation of the tilting device 160. This allows the measurement of the web thickness, web height, flange thickness, flange width, etc. of the shaped steel to be most accurately performed.

[0036] Here, in the form measuring instrument 1 according to the embodiment, the eight measurement sensors 100A to 100H have the same configuration, and are simply referred to as measurement sensors 100 when no particular distinction is made between the eight measurement sensors 100A to 100H.

[0037] Fig. 4 is a diagram showing an example of a schematic configuration of a measurement sensor 100 according to an embodiment. As shown in Fig. 4, the measurement sensor 100, which measures the shape of a structural steel 2 using a light-section method, is composed of a slit light source 101 as a first light source, an imaging device 102 as a first imaging means, a housing 103, and the like.

[0038] The slit light source 101 is realized, for example, by using a slit laser light source in which a semiconductor laser element and a lens are integrated, and irradiates slit light Li1, which is two-dimensional laser light in a predetermined wavelength band, onto the surface 2a of the shaped steel 2. In the shape measuring device 1 according to the embodiment, the slit light sources 101 provided in each of the eight measurement sensors 100A to 100H are set to irradiate the slit light Li1 onto the outer circumferential surface of the same cross section of the shaped steel 2, which is the surface 2a of the shaped steel 2.

[0039] The imaging device 102 is disposed upstream of the slit light source 101 in the conveying direction of the shaped steel 2, and captures an image of the reflected light Li2 of the slit light Li1 reflected by the surface 2a of the shaped steel 2 from a direction different from the irradiation direction of the slit light Li1. The imaging device 102 also outputs a signal related to the captured reflected light Li2 to the calculation processing device 130 described later.

[0040] The housing 103 is a storage member that houses the slit light source 101 and the imaging device 102, and is box-shaped with an opening on the side facing the structural steel 2 so that the slit light Li1 and the reflected light Li2 are not blocked, and is fixed to a support member 11 (see Figure 3).

[0041] Returning to Figure 2, the input device 110 is configured using physical switches, a touch panel, etc., and outputs various signals to the control device 120 in response to input operations by the worker, such as a start instruction signal to start measurement, an end instruction signal to end measurement, and signals related to the type and size of the structural steel 2 to be measured.

[0042] The control device 120 controls the operations of the eight measurement sensors 100A to 100H and the tilt device 160 based on various signals from the input device 110.

[0043] The arithmetic processing device 130 includes a cross-sectional profile generating unit 131, a reference setting unit 132, and a dimension calculation unit 133. The cross-sectional profile generating unit 131 calculates and obtains the distance between the reflection position (the irradiation position of the slit light Li1) of the reflected light Li2 on the surface of the shaped steel 2 and the imaging device 102 for each of the eight measurement sensors 100A to 100H by triangulation based on the data output from the imaging devices 102 of each of the eight measurement sensors 100A to 100H, and acquires the distance as eight two-dimensional profiles. Then, the arithmetic processing device 130 synthesizes the eight two-dimensional profiles in the same cross section of the shaped steel 2, and generates one cross-sectional profile as information on the surface shape of the entire circumference in the same cross section of the shaped steel 2. The reference setting unit 132 sets a measurement reference position (reference line) for the dimensions in the cross-sectional profile. The dimension calculation unit 133 calculates the dimensions of a specific portion in the cross-sectional profile based on the measurement reference position (reference line).

[0044] The arithmetic processing device 130 derives the longitudinal position of the generated cross-sectional profile on the shaped steel 2 using the conveying speed (moving speed) of the shaped steel 2 measured by a laser Doppler velocimeter 4 (see FIG. 1) arranged on the inlet side (upstream side in the conveying direction) of the shape measuring device 1. The arithmetic processing device 130 calculates and derives the dimensions of the shaped steel 2 based on the generated cross-sectional profile using a reference setting unit 132 and a dimension calculation unit 133. The arithmetic processing device 130 also outputs various signals, such as signals related to the generated cross-sectional profile and signals related to the derived dimensions of the shaped steel 2, to the display device 140.

[0045] In addition, since the shape measuring device 1 of the embodiment measures the surface shape of the structural steel 2 while the structural steel 2 is being transported, it is possible to generate multiple cross-sectional profiles continuously in the longitudinal direction of the structural steel 2 and to generate a three-dimensional profile, which is information on the surface shape of the structural steel 2 over the longitudinal direction, by combining these multiple cross-sectional profiles in the longitudinal direction of the structural steel 2.

[0046] The display device 140 displays the cross-sectional profile (surface shape), dimensions, etc. of the shaped steel 2 on a display based on various signals output from the arithmetic processing device 130.

[0047] Returning to Figure 1, in the manufacturing equipment 10 for structural steel 2 of the embodiment, the shape measuring device 1 is configured to be movable by a retract device 5 between an online position on the production line where the shape of the structural steel 2 is measured and an offline position off the production line where maintenance of the shape measuring device 1 is performed.

[0048] As shown in Fig. 1, in a manufacturing facility 10 for manufacturing shaped steel 2 according to the embodiment, a sample measuring device 6 is installed corresponding to the offline position of a shape measuring device 1. The sample measuring device 6 is equipped with a sample test piece made of, for example, an aluminum alloy. Then, at the offline position, the shape measuring device 1 is caused to measure the shape of the sample test piece, and an operator checks the operation of the shape measuring device 1 and checks the measurement accuracy.

[0049] Furthermore, in the manufacturing equipment 10 for the shaped steel 2 according to the embodiment, a calibration device that calibrates the eight measurement sensors 100A-100H of the shape measuring device 1 can be mounted on the shape measuring device 1. When the shape measuring device 1 is located in an offline position, the calibration device can automatically calibrate the eight measurement sensors 100A-100H of the shape measuring device 1 by using a test piece dedicated to calibration stored inside the shape measuring device 1.

[0050] Furthermore, the manufacturing equipment 10 for the shaped steel 2 according to the embodiment can be equipped with an air purge for blowing air onto the surface of the shaped steel 2 to remove water droplets adhering to the surface of the shaped steel 2 before the shape of the shaped steel 2 is measured by the shape measuring device 1. In the manufacturing equipment 10 for the shaped steel 2 according to the embodiment, water droplets are removed from the surface of the shaped steel 2 by air purging, and the shape of the shaped steel 2 is measured by the shape measuring device 1, thereby making it possible to suppress overdetection of defects due to water droplets and loss of cross-sectional profile due to wetting with water.

[0051] Next, an example of a method for measuring the dimensions of the shaped steel 2 by the shape measuring device 1 according to the embodiment will be described. In the shape measuring device 1 according to the embodiment, for example, among the cross-sectional profiles measured by the eight measuring sensors 100A to 100H at a pitch of 1 mm in the longitudinal direction of the shaped steel 2, the dimensions of a specific portion in the cross-section of the shaped steel 2 are measured using cross-sectional profiles every 25 mm. This process corresponds to a cross-sectional profile measuring process. In addition, in the shape measuring device 1 according to the embodiment, the measurement logic of each dimension is incorporated in a dimension measuring program created for each type and size of the shaped steel 2. In this embodiment, the measurement logic when measuring the dimensions of a specific portion in the cross-section of an H-shaped steel and a channel steel as the shaped steel 2 having flanges at both ends of the web will be described below. That is, the shape measuring process and the steps included in the shape measuring process, that is, the reference position setting process and the dimension calculation process, will also be described below.

[0052] Fig. 5 is a diagram showing an example of a cross-sectional profile 200 of an H-shaped steel. The cross-sectional profile 200 shown in Fig. 5 corresponds to a cross section of the H-shaped steel viewed from the downstream side in the conveying direction. In Fig. 5, reference numeral 210 denotes a web portion, reference numeral 211 denotes an upper surface of the web, reference numeral 212 denotes a lower surface of the web, reference numerals 220a and 220b denote flange portions, reference numerals 221a and 221b denote outer surfaces of the flanges, reference numerals 222a and 222b denote upper inner surfaces of the flanges, reference numerals 223a and 223b denote lower inner surfaces of the flanges, reference numerals 224a and 224b denote upper end surfaces of the flanges, and reference numerals 225a and 225b denote lower end surfaces of the flanges.

[0053] In this embodiment, when performing dimensional measurement using the cross-sectional profile 200 of the H-shaped steel, first, the coordinates (coordinate position) of the cross-sectional profile 200 on a two-dimensional coordinate plane having an X-axis and a Y-axis are determined. For example, the thickness direction of the web is defined as the Y-axis direction, and the direction perpendicular to the Y-axis is defined as the X-axis direction, and the coordinates of the cross-sectional profile 200 on the two-dimensional coordinate surface of the X-axis and Y-axis are determined.

[0054] FIG. 6 is a diagram showing an example of a method for setting a reference line BL1 in a cross-sectional profile 200 of an H-shaped steel. In the shape measurement method of an H-shaped steel according to the embodiment, approximate straight lines L1 and L2 are drawn on the cross-sectional profile 200 of the H-shaped steel, which approximate the straight line portions of the web upper surface 211 and the web lower surface 212, in a portion inside the connection portion (R portion) between the web portion 210 and the flange portions 220a and 220b on both sides and not affected by the connection portion. To obtain the approximate straight lines L1 and L2 from the portions of the web upper surface 211 and the web lower surface 212 whose shapes on the drawing are straight lines, a general straight line approximation method can be used, for example, the least squares method or the least absolute value method can be adopted, and an orthogonal regression line (minimum distance square method) can also be used. Note that the "portion whose shape on the drawing is straight" here refers to a portion whose product target shape, which is a manufacturing target, is straight, and in reality, due to manufacturing variations, etc., there may be cases where the shape is not straight but curved or has irregularities.

[0055] The reference line BL1 can be set by selecting from three methods: "(1) The approximate straight line L1 is set as the reference line BL1," "(2) The approximate straight line L2 is set as the reference line BL1," and "(3) A straight line passing through the center between the approximate straight lines L1 and L2 is set as the reference line BL1." When selecting method (1) or (2), it is not necessary to calculate the approximate straight lines that are not used. FIG. 6 shows method (3).

[0056] The direction in which the reference line BL1 extends is the width direction of the H-shaped steel in the cross-sectional profile 200, and the reference line BL1 has a role of determining the direction of dimensions in the cross-sectional profile 200. In setting the reference line BL1, a large amount of data of the portion constituting the web in the cross-sectional profile data of the H-shaped steel is used, so that the reference line can be set accurately. In this manner, in the shape measurement method of the H-shaped steel according to the embodiment, the reference line BL1 can be set based on the web portion 210 regardless of the posture of the H-shaped steel during measurement by the eight measurement sensors 100A to 100H. Furthermore, as described above, by excluding the connection portion (R portion) with the flange portions 220a, 220b, which is a non-linear portion of the web portion 210, from the range of approximation of the linear portions of the web upper surface 211 and the web lower surface 212, the reference line BL1 can be set to be closer to parallel to the linear portions of the web upper surface 211 and the web lower surface 212.

[0057] In this way, in the shape measurement method of the H-shaped steel according to the embodiment, the eight measurement sensors 100A to 100H are used to set a reference line BL1, which serves as the basis for dimensional measurement based on the shape and posture of the H-shaped steel, on the cross-sectional profile 200 obtained by the optical cutting method, thereby improving the measurement accuracy of dimensions.

[0058] 7 is a diagram showing a measurement logic for the web height H of an H-shaped steel. In measuring the web height H of an H-shaped steel, a reference line BL1 is drawn on the cross-sectional profile 200, and the point where the flange outer surface 221a on one side intersects with the reference line BL1 is set as an intersection point P1, and the point where the flange outer surface 221b on the other side intersects with the reference line BL1 is set as an intersection point P2. Then, the distance between the intersection points P1 and P2 in the extending direction of the reference line BL1 is calculated as the web height H. As a result, in the shape measurement method of an H-shaped steel according to the embodiment, it is possible to obtain a more accurate measurement result of the web height H of the H-shaped steel regardless of the posture of the H-shaped steel during measurement by the eight measurement sensors 100A to 100H.

[0059] FIG. 8 is a diagram showing the measurement logic of the web thickness t1 of the H-shaped steel. In the measurement of the web thickness t1 of the H-shaped steel, a reference line BL1 is drawn on the cross-sectional profile 200, and the point where the flange outer surface 221a on one side and the reference line BL1 intersect is set as the intersection point P3. Next, a perpendicular line L3 perpendicular to the reference line BL1 is drawn from the intersection point P3 at a predetermined position on the inside in the width direction of the web part 210. Next, the point where the perpendicular line L3 intersects with the web upper surface 211 is set as the intersection point P4. Similarly, the point where the perpendicular line L3 intersects with the web lower surface 212 is set as the intersection point P5. Then, the distance between the intersection points P4 and P5 in the direction perpendicular to the reference line BL1 is calculated as the web thickness t1. The position where the perpendicular line L3 is drawn to obtain the web thickness t1 may be set according to the product specifications and standards. As a result, in the method for measuring the shape of an H-shaped steel according to the embodiment, it is possible to obtain more accurate measurement results for the web thickness t1 of the H-shaped steel regardless of the posture of the H-shaped steel during measurement by the eight measurement sensors 100A to 100H.

[0060] FIG. 9 is a diagram showing a measurement logic for the flange width B of an H-shaped steel. In measuring the flange width B of an H-shaped steel, a reference line BL1 is drawn on the cross-sectional profile 200, and a straight line L4 is drawn that is parallel to the reference line BL1 and passes through the top point P6 of the flange portion 220b (i.e., the point that is the longest distance from the reference line BL1). Similarly, a straight line L5 is drawn that is parallel to the reference line BL1 and passes through the bottom point P7 of the flange portion 220b (i.e., the point that is the longest distance from the reference line BL1). Then, the distance between the straight line L4 and the straight line L5 in the direction perpendicular to the reference line BL1, that is, in the height direction in the cross-sectional profile 200 in FIG. 9, is calculated as the flange width B. In this way, the shape measurement method of an H-shaped steel according to the embodiment can obtain a more accurate measurement result of the flange width B of the H-shaped steel regardless of the posture of the H-shaped steel during measurement by the eight measurement sensors 100A to 100H.

[0061] FIG. 10 is a diagram showing the measurement logic of the flange thickness t2 of the H-shaped steel. In measuring the flange thickness t2 of the H-shaped steel, a reference line BL1 is drawn on the cross-sectional profile 200, and a straight line L6 that is parallel to the reference line BL1 and passes through a predetermined position of the flange portion 220b is drawn. This predetermined position may be set according to product specifications and standards, so that it is not affected by the R shape of the connection portion between the web portion 210 and the flange portion 220b. Next, the point where the flange outer surface 221b of the flange portion 220b and the straight line L6 intersect is set as the intersection point P8. Similarly, the point where the flange upper inner surface 222b of the flange portion 220b and the straight line L6 intersect is set as the intersection point P9. Then, the distance between the intersection point P8 and the intersection point P9 in the direction in which the reference line BL1 extends is calculated as the flange thickness t2. As a result, in the method for measuring the shape of an H-shaped steel according to the embodiment, it is possible to obtain more accurate measurement results of the flange thickness t2 of the H-shaped steel regardless of the posture of the H-shaped steel during measurement by the eight measurement sensors 100A to 100H.

[0062] FIG. 11 is a diagram showing the measurement logic of the squareness TF, TD of the H-shaped steel. First, in the measurement of the squareness TF of the H-shaped steel on the flange portion 220a side in the width direction of the H-shaped steel, a reference line BL1 is drawn in the cross-sectional profile 200. Next, in the region on the flange outer surface 221a that is not influenced by the tip shapes of the flange upper end surface 224a and the flange lower end surface 225a, a perpendicular line L7 is drawn that passes through the point P10out located at the outermost position in the extending direction of the reference line BL1 and is perpendicular to the reference line BL1. Also, in the region on the flange outer surface 221a that is not influenced by the tip shapes of the flange upper end surface 224a and the flange lower end surface 225a, a perpendicular line L9 is drawn that passes through the point P10in located at the innermost position in the extending direction of the reference line BL1 and is perpendicular to the reference line BL1. Then, the distance between the perpendicular line L7 and the perpendicular line L9 in the extending direction of the reference line BL1 is calculated as the squareness TF.

[0063] Similarly, in measuring the squareness TD of the H-shaped steel on the flange portion 220b side in the width direction of the H-shaped steel, a reference line BL1 is drawn on the cross-sectional profile 200. Next, in an area on the flange outer surface 221b that is not influenced by the tip shapes of the flange upper end surface 224b and the flange lower end surface 225b, a perpendicular line L8 is drawn that passes through the point P11out located at the outermost position in the extending direction of the reference line BL1 and is perpendicular to the reference line BL1. Also, in an area on the flange outer surface 221b that is not influenced by the tip shapes of the flange upper end surface 224b and the flange lower end surface 225b, a perpendicular line L10 is drawn that passes through the point P11in located at the innermost position in the extending direction of the reference line BL1 and is perpendicular to the reference line BL1. Then, the distance between the perpendicular line L8 and the perpendicular line L10 in the extending direction of the reference line BL1 is calculated as the squareness TD.

[0064] As a result, in the shape measurement method of the H-shaped steel according to the embodiment, it is possible to obtain more accurate measurement results for the squareness TF, TD of the H-shaped steel regardless of the posture of the H-shaped steel during measurement by the eight measurement sensors 100A to 100H, and by avoiding the gap with the R portion at the tip of the flange.

[0065] FIG. 12 is a diagram showing the measurement logic of flange fold of H-shaped steel. First, in the measurement of flange fold of H-shaped steel on the flange portion 220a side, a reference line BL1 is drawn in the cross-sectional profile 200. Then, the point where the flange outer surface 221a and the reference line BL1 intersect is set as the intersection point P13. Next, a perpendicular line L11 is drawn that passes through point P12 on the flange outer surface 221a, which is the limit point where the influence of the tip shape of the flange upper end surface 224a disappears, and is perpendicular to the reference line BL1. Also, a perpendicular line L13 is drawn that passes through point P14 on the flange outer surface 221a, which is the limit point where the influence of the tip shape of the flange lower end surface 225a disappears, and is perpendicular to the reference line BL1. In FIG. 12, the flange fold on the upper left side (flange upper end surface 224a side) can be represented by the distance a from the intersection point P13 to the perpendicular line L11 in the direction in which the reference line BL1 extends. In FIG. 12, the flange bend on the lower left side (the flange lower end surface 225a side) can be represented by the distance b from the intersection point P13 to the perpendicular line L13 in the direction in which the reference line BL1 extends.

[0066] Similarly, in FIG. 12, in measuring the flange fold of the H-shaped steel on the flange portion 220b side, a reference line BL1 is drawn on the cross-sectional profile 200. Then, the point where the flange outer surface 221b and the reference line BL1 intersect is taken as the intersection point P15. Next, a perpendicular line L15 is drawn that passes through point P16 on the flange outer surface 221b, which is the limit point where the influence of the tip shape of the flange upper end surface 224b disappears, and is perpendicular to the reference line BL1. In FIG. 12, the flange fold on the upper right side (the flange upper end surface 224b side) can be represented by the distance d from the intersection point P15 to the perpendicular line L15 in the direction in which the reference line BL1 extends. In FIG. 12, the flange fold on the lower right side (the flange lower end surface 225b side) can also be represented in a similar manner. In addition, for flange folds at the four locations (top, bottom, left and right), a positive sign is used if the flange tip is bent outward, and a negative sign is used if the flange tip is bent inward.

[0067] As a result, in the shape measurement method for H-shaped steel of the embodiment, it is possible to obtain more accurate measurement results of flange bends in H-shaped steel regardless of the posture of the H-shaped steel when measured by the eight measurement sensors 100A to 100H, and by avoiding the gap with the R portion at the tip of the flange.

[0068] FIG. 13 is a diagram showing the measurement logic of the center offset of the H-shaped steel. In measuring the center offset of the H-shaped steel, a reference line BL1 is drawn on the cross-sectional profile 200, and the point where the flange outer surface 221a of the flange portion 220a intersects with the reference line BL1 is set as the intersection point P17. Next, a straight line L16 is drawn parallel to the reference line BL1 and passing through the uppermost point P18 of the flange portion 220a. Similarly, a straight line L17 is drawn parallel to the reference line BL1 and passing through the lowermost point P19 of the flange portion 220a. Next, a perpendicular line L18 perpendicular to the reference line BL1 is drawn at an arbitrary position on the inside in the width direction of the web portion 210, at an arbitrary distance in addition to the nominal value of the flange thickness from the intersection point P17. The position where this perpendicular line L18 is drawn may be set to a position that is not affected by the R shape of the connection portion between the web portion 210 and the flange portion 220a. Next, the point where the perpendicular line L18 intersects with the web upper surface 211 is set as the intersection point P20. Similarly, the point where perpendicular line L18 and web underside 212 intersect is defined as intersection point P21. Next, distance e is calculated between intersection point P20 and straight line L16 in a direction perpendicular to reference line BL1. Similarly, distance f is calculated between intersection point P21 and straight line L17 in a direction perpendicular to reference line BL1 (height direction of the H-shaped steel). Then, the difference between distance e and distance f is multiplied by 1 / 2 to find the center offset of the H-shaped steel.

[0069] As a result, in the method for measuring the shape of an H-shaped steel beam according to the embodiment, it is possible to obtain more accurate measurement results of the center offset of an H-shaped steel beam regardless of the posture of the H-shaped steel beam during measurement by the eight measurement sensors 100A to 100H.

[0070] FIG. 14 is a diagram showing the measurement logic of the web warp of the H-shaped steel. In measuring the web warp of the H-shaped steel, a reference line BL1 is drawn on the cross-sectional profile 200, and perpendicular lines L19 and L20 perpendicular to the reference line BL1 are drawn at two arbitrary positions on the inside in the width direction of the web portion 210, each of which is an arbitrary distance in addition to the nominal value of the flange thickness from the flange outer surfaces 221a and 221b. The position where the perpendicular line L19 is drawn may be set to a position that is not affected by the R shape of the connection portion between the web portion 210 and the flange portion 220a. Similarly, the position where the perpendicular line L20 is drawn may be set to a position that is not affected by the R shape of the connection portion between the web portion 210 and the flange portion 220b. Next, the point where the perpendicular line L19 and the web upper surface 211 intersect is set to the intersection point P25, and the point where the perpendicular line L20 and the web upper surface 211 intersect is set to the intersection point P26. Next, a straight line L21 is drawn connecting the intersection point P25 and the intersection point P26 in the direction in which the reference line BL1 extends. Next, a plurality of perpendicular lines L22, L23, L24, L25, and L26 are drawn that are perpendicular to the straight line L21 and divide the straight line L21. Then, the distances g, h, i, j, and k between the straight line L21 and the web upper surface 211 on each of the perpendicular lines L22, L23, L24, L25, and L26 are calculated, and the value with the maximum absolute value among the calculated distances g, h, i, j, and k is determined as the web warp. When the direction of the web warp is the opposite direction to that in FIG. 14, the distances g, h, i, j, and k are negative, so the value with the maximum absolute value among them is assigned a negative sign to determine the web warp. The number and intervals of the perpendicular lines dividing the straight line L21 can be appropriately selected according to the product specifications and standards. As a result, in the method for measuring the shape of an H-shaped steel according to the embodiment, it is possible to obtain more accurate measurement results of the web warpage of the H-shaped steel regardless of the orientation of the H-shaped steel during measurement by the eight measurement sensors 100A to 100H.

[0071] FIG. 15 is a diagram showing a measurement logic for the shape of the flange tip of an H-shaped steel. In measuring the shape of the flange tip of an H-shaped steel, a straight line L27 extending along the flange outer surface 221a of the flange portion 220a is drawn. Next, a straight line L28 extending along the flange upper end surface 224a of the flange portion 220a is drawn. Next, the point where the straight lines L27 and L28 intersect is set as the intersection point P27. Next, a straight line L29 is drawn through the intersection point P27 in a direction that divides the straight lines L27 and L28 at an equal angle. When the straight lines L27 and L28 are perpendicular to each other, a straight line L29 is drawn from the intersection point P27 in a direction that opens 45° from each of the straight lines L27 and L28. Next, the point where the straight line L29 intersects with the flange upper end surface 224a is set as the intersection point P28. Then, the shape of the flange tip is obtained by calculating the distance m1 between the intersection point P27 and the intersection point P28 in the direction in which the straight line L29 extends. As a result, in the method for measuring the shape of an H-shaped steel beam according to the embodiment, it is possible to obtain more accurate measurement results of the shape of the flange tip of the H-shaped steel beam regardless of the position of the H-shaped steel beam during measurement by the eight measurement sensors 100A to 100H.

[0072] Fig. 16 is a diagram showing an example of a cross-sectional profile 300 of a channel steel. The cross-sectional profile 300 shown in Fig. 16 corresponds to a cross section of the channel steel viewed from the downstream side in the conveying direction. In Fig. 16, reference numeral 310 denotes a web portion, reference numeral 311 denotes an upper surface of the web, reference numeral 312 denotes a lower surface of the web, reference numerals 320a and 320b denote flange portions, reference numerals 321a and 321b denote outer surfaces of the flanges, reference numerals 322a and 322b denote inner surfaces of the flanges, and reference numerals 323a and 323b denote flange end surfaces.

[0073] In this embodiment, when performing dimensional measurement using the cross-sectional profile 300 of a channel steel, first, the coordinates (coordinate position) of the cross-sectional profile 300 are determined on a two-dimensional coordinate plane having an X-axis and a Y-axis. For example, the coordinates of the cross-sectional profile 300 are determined on a two-dimensional coordinate surface of the X-axis and Y-axis, with the web direction being the Y-axis direction and the direction perpendicular to the Y-axis being the X-axis.

[0074] FIG. 17 is a diagram showing an example of a method for setting a reference line BL2 in a cross-sectional profile 300 of a channel steel. In the shape measurement method of the channel steel according to the embodiment, approximate straight lines L31 and L32 approximating the straight line portions of the web upper surface 311 and the web lower surface 312 are drawn in a portion of the cross-sectional profile 300 of the channel steel that is inside the connection portion (R portion) between the flange portions 320a and 320b on both sides of the web portion 310 and is not affected by the connection portion. To obtain the approximate straight lines L31 and L32 from the straight line portions of the web upper surface 311 and the web lower surface 312, a general straight line approximation method can be used. For example, the least squares method or the least absolute value method can be adopted, and an orthogonal regression line (minimum distance square method) can also be used. Then, a straight line passing through the center between the approximate straight lines L31 and L32 is drawn as the reference line BL2. The direction in which the reference line BL2 extends is the width direction of the channel steel in the cross-sectional profile 300, and the reference line BL2 has a role of determining the direction of dimensions in the cross-sectional profile 300. In this way, in the shape measurement method of the channel steel according to the embodiment, the reference line BL2 can be set based on the web portion 310 regardless of the posture of the channel steel during measurement by the eight measurement sensors 100A to 100H. Furthermore, as described above, by excluding the connection portion (R portion) with the flange portions 320a, 320b, which is a non-linear portion of the web portion 310, from the range of approximation of the linear portions of the web upper surface 311 and the web lower surface 312, the reference line BL2 can be set to be more nearly parallel to the linear portions of the web upper surface 311 and the web lower surface 312. Note that, as with the case of the H-shaped steel, the reference line BL2 may be the approximated straight line L31 or the approximated straight line L32. In setting this reference line BL2, the present application uses a large amount of data on the portions constituting the web in the cross-sectional profile data of the channel steel, so that an accurate reference line can be set.

[0075] In this way, in the method for measuring the shape of a channel steel according to the embodiment, the accuracy of dimensional measurement can be improved by setting a reference line BL2, which serves as the basis for dimensional measurement based on the shape and posture of the channel steel, on the cross-sectional profile 300 obtained by the optical cutting method using eight measurement sensors 100A to 100H.

[0076] FIG. 18 is a diagram showing a measurement logic for the web height H1 of the channel steel. In measuring the web height H1 of the channel steel, a reference line BL2 is drawn in the cross-sectional profile 300, and a straight line L33 parallel to the reference line BL2 is drawn a predetermined distance s1 upward from the reference line BL2 (toward the flange end faces 323a, 323b) so as to pass through the flange parts 320a, 320b. The predetermined distance s1 can be set according to product specifications, work standards in a factory, and the like. For example, when comparing the height of the channel steel automatically measured by the present invention with a conventional measurement value measured manually by an operator, the predetermined distance s1 can be set according to the gauge measurement conditions by the operator in the past. Next, the point where the flange outer surface 321a on one side intersects with the straight line L33 is set as the intersection point P31, and the point where the flange outer surface 321b on the other side intersects with the straight line L33 is set as the intersection point P32. Then, the distance between intersection point P31 and intersection point P32 in the extending direction of reference line BL2 is calculated as web height H1. As a result, in the channel steel shape measuring method according to the embodiment, it is possible to obtain more accurate measurement results of the web height H1 of the channel steel regardless of the orientation of the channel steel during measurement by the eight measurement sensors 100A to 100H.

[0077] FIG. 19 is a diagram showing a measurement logic for the web thickness t10 of the channel steel. In measuring the web thickness t10 of the channel steel, a reference line BL2 is drawn on the cross-sectional profile 300, and a straight line L34 parallel to the reference line BL2 is drawn upward (toward the flange end surface 323a) from the reference line BL2 by a predetermined distance s2 so as to intersect with the flange outer surface 321a on one side. The predetermined distance s2 can be the same value as the predetermined distance s1 used when measuring the web height of the channel steel described above. Next, the point where the flange outer surface 321a and the straight line L34 intersect is set as the intersection point P33. Next, a perpendicular line L35 perpendicular to the reference line BL2 and passing through the intersection point P33 is drawn. Next, a perpendicular line L36 perpendicular to the reference line BL2 is drawn from the perpendicular line L35 (intersection point P33) at a predetermined position inside in the width direction of the web portion 310. Then, the distance between the web upper surface 311 and the web lower surface 312 on the perpendicular line L36 in the direction perpendicular to the reference line BL2 is calculated as the web thickness t10. The predetermined position for drawing the perpendicular line L36 to find the web thickness t10 may be set according to the product specifications and standards. As a result, the channel steel shape measuring method according to the embodiment can obtain more accurate measurement results for the web thickness t10 of the channel steel regardless of the position of the channel steel during measurement by the eight measurement sensors 100A to 100H.

[0078] FIG. 20 is a diagram showing a measurement logic for the flange width B1 of the channel steel. In measuring the flange width B1 of the channel steel, a reference line BL2 is drawn on the cross-sectional profile 300, and the point where the reference line BL2 intersects with the flange outer surface 321b is set as an intersection point P34. Next, a perpendicular line L37 perpendicular to the reference line BL2 is drawn at a position inside the width direction of the web portion 310 by a predetermined distance s3 from the intersection point P34. Note that the predetermined distance s3 can be set to a distance that is not affected by the outer R shape of the connection portion between the web portion 310 and the flange portion 320b, and can also be set according to product specifications. Next, the point where the perpendicular line L37 intersects with the web lower surface 312 is set as an intersection point P35. Next, a straight line L38 that is parallel to the reference line BL2 and passes through the intersection point P35 is drawn. Next, a straight line L39 that is parallel to the reference line BL2 and passes through the uppermost point P36 of the flange portion 320b is drawn. Then, the distance between lines L38 and L39 in the direction perpendicular to reference line BL2, i.e., the height direction of the channel steel in the cross-sectional profile 300, is calculated as the flange width B1. As a result, the method for measuring the shape of a channel steel according to the embodiment can obtain more accurate measurement results for the flange width B1 of the channel steel, regardless of the position of the channel steel during measurement by the eight measurement sensors 100A-100H.

[0079] FIG. 21 is a diagram showing a measurement logic for the flange thickness t20 of the channel steel. In measuring the flange thickness t20 of the channel steel, a reference line BL2 is drawn on the cross-sectional profile 300, and a straight line L40 is drawn that is parallel to the reference line BL2 and passes through the top point P37 of the flange portion 320a. Next, a straight line L41 is drawn parallel to the reference line BL2 at a predetermined position on the inside in the width direction (perpendicular to the reference line BL2) of the flange portion 320a from the straight line L40. This predetermined position is a position that is not affected by the R shape of the connection portion between the web portion 310 and the flange portion 320a, and may be set according to product specifications and standards. Then, the distance between the flange outer surface 321a and the flange inner surface 322a on the straight line L41 in the extension direction of the reference line BL2 (width direction of the channel steel) is calculated as the flange thickness t20. As a result, in the channel steel shape measuring method according to the embodiment, it is possible to obtain more accurate measurement results of the flange thickness t20 of the channel steel regardless of the position of the channel steel during measurement by the eight measurement sensors 100A to 100H.

[0080] FIG. 22 is a diagram showing a measurement logic for the squareness of a channel steel. In measuring the squareness of a channel steel on the flange portion 320a side in the width direction of the channel steel, a reference line BL2 is drawn in the cross-sectional profile 300, and a straight line L42 that is perpendicular to the reference line BL2 and tangent to the outermost position of the flange outer surface 321a is drawn. Next, a straight line L43 that is parallel to the reference line BL2 and passes through the uppermost point P38 of the flange portion 320a is drawn. Next, a straight line L44 that is parallel to the reference line BL2 and passes through a position that is a predetermined distance s4 closer to the reference line BL2 side from the straight line L43 is drawn. The predetermined distance s4 is a distance that eliminates the influence of the tip shape of the flange end surface 323a, but if it is too far away from the tip or corner, it will be influenced by the flange shape, so it is preferable to set it to a distance of, for example, 5 to 10 [mm]. Next, a distance a1 between the straight line L42 on the straight line L44 and the flange outer surface 321a in the direction in which the reference line BL2 extends is calculated. Next, a straight line L45 is drawn parallel to the reference line BL2, passing through a position approaching the flange end surface 323a by a predetermined distance s5 from the reference line BL2. The predetermined distance s5 may be set to a distance that is not affected by the outer R shape of the connection portion between the web portion 310 and the flange portion 320a. Next, a distance b1 between the straight line L42 on the straight line L45 and the flange outer surface 321a in the direction in which the reference line BL2 extends is calculated. Then, the larger value of the calculated distance a1 and distance b1 is calculated as the squareness of the channel steel on the flange portion 320a side. As a result, in the shape measurement method of the channel steel according to the embodiment, it is possible to obtain a more accurate measurement result of the squareness of the channel steel regardless of the position of the channel steel when measuring with the eight measurement sensors 100A to 100H, and by avoiding the gap with the R portion of the flange tip.

[0081] FIG. 23 is a diagram showing a measurement logic of the web warp of the channel steel. In the measurement of the web warp of the channel steel, a reference line BL2 is drawn on the cross-sectional profile 300, and the points where the reference line BL2 intersects with the flange outer surfaces 321a, 321b are set as intersection points P39, P40, respectively. Next, perpendicular lines L48, L49 perpendicular to the reference line BL2 are drawn at two arbitrary positions on the inside in the width direction of the web portion 310, the positions being the nominal value of the flange thickness plus the predetermined distances s6, s7 from the intersection points P39, P40, respectively. It is preferable that the predetermined distances s6, s7 are set to values ​​that can sufficiently exclude the influence of the R shape of the connection portion between the web portion 310 and the flange portions 320a, 320b at the positions at the predetermined distances s6 away from the intersection point P39 and the predetermined distances s7 away from the intersection point P40. The predetermined distances s6 and s7 are preferably set to, for example, 10 to 25 mm, so that the influence of the R shape of the connection portion can be sufficiently eliminated. Next, the intersection point of the perpendicular line L48 and the web lower surface 312 is set as the intersection point P41, and the intersection point of the perpendicular line L49 and the web lower surface 321 is set as the intersection point P42. Next, a straight line L50 is drawn connecting the intersection points P41 and P42 in the direction in which the reference line BL2 extends. Next, three perpendicular lines L51, L52, and L53 are drawn, which are perpendicular to the straight line L50 and divide the straight line L50 into four equal parts. Then, the distances n1, n2, and n3 between the straight line L50 and the web lower surface 312 are calculated on each of the perpendicular lines L51, L52, and L53, and the maximum value of the calculated distances n1, n2, and n3 is set as the web warpage. As a result, in the channel steel shape measuring method according to the embodiment, it is possible to obtain more accurate measurement results of the web warpage of the channel steel regardless of the position of the channel steel during measurement by the eight measurement sensors 100A to 100H.

[0082] FIG. 24 is a diagram showing the measurement logic of the shape of the flange tip of the channel steel. In measuring the shape of the flange tip of the channel steel, a straight line L54 extending along the flange outer surface 321a of the flange portion 320a is drawn. Next, a straight line L55 extending along the flange end surface 324a of the flange portion 320a is drawn. Next, the point where the straight lines L54 and L55 intersect is set as the intersection point P43. Next, a straight line L56 is drawn through the intersection point P43 in a direction that divides the straight lines L54 and L55 at an equal angle. When the straight lines L54 and L55 are perpendicular to each other, a straight line L56 is drawn from the intersection point P43 in a direction that has an opening of 45° with respect to each of the straight lines L54 and L55. A straight line L54 extending along the flange outer surface 321a of the flange portion 320a is drawn. Next, a straight line L55 extending along the flange end surface 324a of the flange portion 320a and intersecting with the straight line L54 is drawn. Next, the point where the lines L54 and L55 intersect is designated as the intersection point P43. Next, a line L56 is drawn from the intersection point P43 in a direction that is offset by 45° from the lines L54 and L55. Next, the point where the line L56 intersects with the flange end surface 324a is designated as the intersection point P44. Then, the shape of the flange tip is measured by calculating the distance m2 between the intersection points P43 and P44 in the direction in which the line L56 extends. As a result, in the channel steel shape measuring method according to the embodiment, it is possible to obtain more accurate measurement results of the shape of the flange tip of the channel steel regardless of the position of the channel steel during measurement by the eight measurement sensors 100A to 100H.

[0083] Here, in the manufacturing equipment 10 for the shaped steel 2 according to the embodiment, the conveyance of the shaped steel 2 is guided by a pair of inlet side variable guides 32a, 32b so as to prevent the shaped steel 2 from skewing, thereby reducing skewing. EXAMPLES

[0084] In this embodiment, the dimensions (web height, flange width, web thickness, flange thickness, web warp, squareness, flange bend, center offset) of the sample test piece of the H-shaped steel were measured by the shape measuring device 1 using the shape measuring method of the shaped steel 2 (H-shaped steel) according to the embodiment. In this embodiment, the measurement of the sample test piece being transported by the shaped steel transport device 3 online was repeated five times. At this time, the entrance side variable guides 32a, 32b and the exit side variable guides 33a, 33b were used to determine the left and right positions of the H-shaped steel during transport during measurement and to guide it to prevent it from skewing, respectively, on the entrance side and the exit side of the shape measuring device 1. In addition, for comparison, a cut sample was cut out from the measurement site of the H-shaped steel measured in this embodiment, from which the cross-sectional shape could be confirmed. Then, each dimension was measured by the conventional manual measurement method using a caliper, a micrometer, a straightedge, and a gap gauge. This manual measurement was also repeated five times, and the average value of the dimensions measured manually five times was taken as the "true value" for evaluating the dimensional accuracy in this embodiment.

[0085] FIG. 25 is a plot of the difference (dimension difference) between the dimension measured by the shape measuring device 1 according to the embodiment and the average value of the dimension measured manually five times for each dimension of the sample test piece. In FIG. 25, the first reference line BL1 is determined by the method shown in FIG. 6, and the dimension is calculated as Compliant Example 1, which is indicated by a white circle symbol. In addition, in imitation of the method disclosed in Patent Document 2, one representative point is selected from the flange lower end surface 225a and the flange lower end surface 225b, the first reference line BL1 is determined from these two points, and the dimension is calculated as Compliant Example 2, which is indicated by a white triangle symbol. In addition, "3σ" in FIG. 25 is a value three times σ when σ is the standard deviation of the variation in the dimension measurement repeated five times for Compliant Example 1, and indicates the degree of variation.

[0086] In this embodiment, the target dimensional difference for the web height and flange width is within -1.0 to +1.0 mm, and the target dimensional difference for the other dimensions is within -0.5 to +0.5 mm. From FIG. 25, it can be seen that the shape measuring device 1 using the shape measuring method for shaped steel 2 (H-shaped steel) according to the embodiment can repeatedly and accurately measure each dimension of the sample test piece for each dimension of the sample test piece. In particular, very good measurement accuracy is achieved in the conformity example 1 in which the first reference line BL1 is determined by the method shown in FIG. 6 and the dimensions are calculated. [Explanation of symbols]

[0087] 1 Shape measuring device 2 section steel 3 Beam conveyor 4. Laser Doppler Speedometer 5 Retract device 6. Apparatus for measuring samples 10 Manufacturing equipment 31 Conveyor roller 32a, 32b Inlet side variable guide 33a, 33b Variable guide on outlet side 100 Measurement Sensor 110 Input Device 120 Control device 130 Processing Unit 140 Display device 160 Tilt device 200 Cross-Section Profile 210 Web Department 211 Web top 212 Web bottom 220a, 220b Flange part 221a, 221b Flange outer surface 222a, 222b Flange upper inner surface 223a, 223b Flange bottom inner surface 224a, 224b Flange upper end surface 225a, 225b Flange bottom surface 300 Cross-Section Profile 310 Web Department 311 Web top 312 Web bottom 320a, 320b Flange part 321a, 321b Flange outer surface 322a, 322b Flange inner surface 323a, 323b Flange end face

Claims

1. a cross-sectional profile measuring step of measuring a cross-sectional profile representing a shape of a cross section perpendicular to a longitudinal direction of a shaped steel having flanges at both ends of a web by a light cutting method; A shape measuring process for measuring a shape of the section steel using the cross-sectional profile; having The shape measuring step includes: a reference position setting step of setting a reference position for measuring a dimension in the cross-sectional profile; a dimension calculation step of calculating a dimension of a specific portion in the cross-sectional profile with reference to the measurement reference position; having As the dimensions of the specific portion, one or more measurements selected from web height, web thickness, flange width, flange thickness, squareness, flange fold, center offset, web warp, and flange tip shape are carried out; A method for measuring the shape of a structural steel, characterized in that a reference line is set for the cross-sectional profile from either a first approximation straight line that is approximated from the portion of the upper surface of the web excluding the connection portions with the flanges on both sides of the web, or a second approximation straight line that is approximated from the portion of the lower surface of the web excluding the connection portions with the flanges on both sides of the web, or a straight line passing through the center between the first approximation straight line and the second approximation straight line is set as a reference line, and used as the measurement reference position.

2. The shape measuring method for a shaped steel according to claim 1, In the measurement of the web height, the cross-sectional profile is A point where an outer surface of one flange and the reference line intersect is defined as a first intersection point, A point where the outer surface of the other flange and the reference line intersect is defined as a second intersection point; A shape measuring method for a structural steel, comprising the steps of: calculating, as the web height, a distance between the first intersection point and the second intersection point in the direction in which the reference line extends.

3. The shape measuring method for a shaped steel according to claim 1, In measuring the web thickness, the cross-sectional profile is A point where an outer surface of one flange and the reference line intersect is defined as a third intersection point; A first straight line perpendicular to the reference line is drawn at a predetermined position on the inside in the width direction of the web portion from the third intersection point; A point where the first straight line and the upper surface of the web intersect is a fourth intersection point; A point where the first straight line and the web lower surface intersect is a fifth intersection point; A method for measuring the shape of a structural steel, comprising the steps of: calculating, as the web thickness, a distance between the fourth intersection point and the fifth intersection point in a direction perpendicular to the reference line.

4. The shape measuring method for a shaped steel according to claim 1, In measuring the flange width, the cross-sectional profile is Draw a second straight line parallel to the reference line and passing through the uppermost point of the flange portion; Draw a third straight line that is parallel to the reference line and passes through the lowest point of the flange portion; A method for measuring the shape of a structural steel, comprising the steps of: calculating the distance between the second straight line and the third straight line in a direction perpendicular to the reference line as the flange width.

5. The shape measuring method for a shaped steel according to claim 1, In measuring the flange width, the cross-sectional profile is A point where the reference line intersects with the flange outer surface is defined as a sixth intersection point; A fourth straight line perpendicular to the reference line is drawn at a position a predetermined distance inward from the sixth intersection point in the width direction of the web portion; A point where the fourth straight line and the web lower surface intersect is a seventh intersection point, Draw a fifth straight line that is parallel to the reference line and passes through the seventh intersection point; Draw a sixth straight line parallel to the reference line and passing through the uppermost point of the flange portion; A method for measuring the shape of a structural steel, comprising the steps of: calculating, as the flange width, the distance between the fifth straight line and the sixth straight line in a direction perpendicular to the reference line.

6. The shape measuring method for a shaped steel according to claim 1, In the measurement of the flange thickness, the cross-sectional profile is Draw a seventh straight line that is parallel to the reference line and passes through a predetermined position of the flange portion; a point where an outer surface of the flange portion intersects with the seventh straight line is defined as an eighth intersection point; a point where an inner flange surface of the flange portion intersects with the seventh straight line is defined as a ninth intersection point; A method for measuring the shape of a structural steel, comprising the steps of: calculating the distance between the eighth intersection point and the ninth intersection point in the direction in which the reference line extends as the flange thickness.

7. The shape measuring method for a shaped steel according to claim 1, In the measurement of the perpendicularity, the cross-sectional profile is On the outer surface of the flange, in an area not affected by the tip shapes of the flange upper end surface and the flange lower end surface, an eighth straight line is drawn that passes through a point located at the outermost side in the direction in which the reference line extends and is perpendicular to the reference line; A ninth straight line is drawn on the outer surface of the flange in an area that is not affected by the tip shapes of the flange upper end surface and the flange lower end surface, passing through a point located on the innermost side in the direction in which the reference line extends and perpendicular to the reference line; A method for measuring the shape of a structural steel, comprising calculating the perpendicularity as the distance between the eighth straight line and the ninth straight line in the direction in which the reference line extends.

8. The shape measuring method for a shaped steel according to claim 1, In the measurement of the flange crease, the cross-sectional profile is A point where the flange outer surface and the reference line intersect is a tenth intersection point, Draw an eleventh straight line on the outer surface of the flange, passing through a limit point where the influence of the tip shape of the upper end surface of the flange disappears, and perpendicular to the reference line; Draw a twelfth straight line on the outer surface of the flange, passing through a limit point where the influence of the tip shape of the lower end surface of the flange disappears, and perpendicular to the reference line; A distance from the tenth intersection point to the eleventh straight line in the direction in which the reference line extends is calculated as a flange bend on the flange upper end surface side, A method for measuring the shape of a structural steel, comprising calculating the distance from the tenth intersection point to the twelfth straight line in the direction in which the reference line extends as a flange bend on the lower end face side of the flange.

9. The shape measuring method for a shaped steel according to claim 1, In the measurement of the central deviation, the cross-sectional profile is A point where an outer surface of the flange portion intersects with the reference line is defined as an eleventh intersection point, Draw a thirteenth straight line parallel to the reference line and passing through the uppermost point of the flange portion; Draw a fourteenth straight line that is parallel to the reference line and passes through the lowest point of the flange portion; A fifteenth straight line is drawn perpendicular to the reference line at an arbitrary position on the inside in the width direction of the web portion from the eleventh intersection point by an arbitrary distance in addition to the nominal value of the flange thickness; A point where the fifteenth straight line and the web upper surface intersect is a twelfth intersection point; A point where the fifteenth straight line and the web lower surface intersect is a thirteenth intersection point, Calculating a third distance between the twelfth intersection point and the thirteenth straight line in a direction perpendicular to the reference line; Calculating a fourth distance between the thirteenth intersection point and the fourteenth straight line in a direction perpendicular to the reference line; a difference between the third distance and the fourth distance multiplied by 1 / 2 to measure the central deviation.

10. The shape measuring method for a shaped steel according to claim 1, In the measurement of the web warpage, the cross-sectional profile is Draw a 16th straight line and a 17th straight line perpendicular to the reference line at two arbitrary positions on the inside in the width direction of the web portion, the arbitrary distance being in addition to the nominal value of the flange thickness from the outer surfaces of the flanges on both sides, The points where the web upper surface or the web lower surface intersect with the sixteenth straight line and the seventeenth straight line are defined as a fourteenth intersection point and a fifteenth intersection point, Draw an eighteenth straight line connecting the fourteenth intersection point and the fifteenth intersection point in the extension direction of the reference line; A method for measuring the shape of a structural steel, comprising calculating as the web warp the maximum value of the distance between the web upper surface or the web lower surface and the 18th straight line in a direction perpendicular to the reference line.

11. The shape measuring method for a shaped steel according to claim 1, In the measurement of the shape of the flange tip, the cross-sectional profile is Draw a nineteenth straight line extending along the flange outer surface of the flange portion; A twentieth straight line is drawn along the flange upper end surface of the flange portion and intersects with the nineteenth straight line; Draw a 21st straight line through a 16th intersection point where the 19th straight line and the 20th straight line intersect, in a direction that divides the 19th straight line and the 20th straight line at an equal angle; A point where the 21st straight line and the flange upper end surface intersect is a 17th intersection point, A method for measuring the shape of a structural steel, comprising the steps of: calculating a fifth distance between the sixteenth intersection point and the seventeenth intersection point in the direction in which the twenty-first straight line extends; and measuring the shape of the flange tip.

12. The shape measurement method for a shaped steel according to any one of claims 1 to 11, A method for measuring the shape of a shaped steel, wherein the shaped steel is an H-shaped steel or a channel steel.

13. A method for manufacturing a shaped steel, comprising a step of measuring a shape of the shaped steel by the method for measuring a shape of the shaped steel according to any one of claims 1 to 11.

14. A method for manufacturing a shaped steel, comprising a step of measuring a shape of the shaped steel by the method for measuring a shape of the shaped steel according to claim 12.

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