JP2006234540A - H-section steel shape measuring method - Google Patents
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Abstract
Description
本発明は、圧延されたＨ形鋼の形状（曲がり、反り）を測定するためのＨ形鋼の形状測定方法に関するものである。 The present invention relates to a method for measuring the shape of an H-section steel for measuring the shape (bending or warping) of the rolled H-section steel.
多くのＨ形鋼は、高温のビレットやブルームをブレイクダウンミル、ユニバーサルミル、エッジャといった圧延機を用いて熱間圧延することで製造される。 Many H-section steels are manufactured by hot-rolling hot billets and blooms using a rolling mill such as a breakdown mill, a universal mill, or an edger.
その際に、熱間圧延ラインでは、圧延後のＨ形鋼の寸法を測定し、その測定寸法と目標寸法とを比較して、必要があれば圧延機の圧下設定を修正するようにしている。 At that time, in the hot rolling line, the dimension of the H-shaped steel after rolling is measured, the measured dimension is compared with the target dimension, and the reduction setting of the rolling mill is corrected if necessary. .
従来、このような寸法測定は、圧延後のＨ形鋼の所定個所を熱鋸で切断して測定用断面サンプルを採取し、採取した測定用断面サンプルを検査員が測定することで行われていたが、近年、熱間圧延ライン上に設置された走間寸法測定装置によって圧延ラインを走行中のＨ形鋼の寸法を測定することが行われるようになってきた（例えば、特許文献１参照。）。 Conventionally, such dimension measurement is performed by cutting a predetermined portion of the rolled H-shaped steel with a heat saw to collect a measurement cross-section sample, and an inspector measures the collected measurement cross-section sample. However, in recent years, the dimension of the H-section steel traveling on the rolling line has been measured by a running dimension measuring device installed on the hot rolling line (see, for example, Patent Document 1). .).
走間寸法測定装置は、レーザ距離計や光波距離計等の距離センサを備えており、その距離センサによって、図１に示すウェブ厚（ｔ1、ｔ1’）、フランジ幅（Ｂ１、Ｂ２）、ウェブ高さ（Ｗ）、中心偏り（Ｓ１、Ｓ２）といったＨ形鋼の断面各部の寸法を測定するようになっている。
Ｈ形鋼の圧延では、圧延機の圧下設定が適切でないと、左右あるいは上下の圧下バランスが崩れて、圧延後のＨ形鋼に長手方向での曲がりや反りが発生する。なお、ここでは、曲がりとは走行方向に対して左右に曲がることを表し、反りとは走行方向に対して上下に曲がることを表す。 When rolling the H-section steel, if the rolling mill setting is not appropriate, the left / right or top / bottom rolling balance is lost, and the H-section steel after rolling is bent or warped in the longitudinal direction. Here, the bend represents bending to the left and right with respect to the traveling direction, and the warp represents to bend vertically with respect to the traveling direction.
従来の走間寸法測定装置は、ウェブ厚、フランジ幅、ウェブ高さ、中心偏りといったＨ形鋼の断面各部の寸法を測定しているが、曲がりや反りといったＨ形鋼の長手方向の形状を測定するものがなかった。 The conventional running dimension measuring device measures the dimensions of each section of the H-section steel such as web thickness, flange width, web height, and center deviation. However, the longitudinal shape of the H-section steel such as bending and warping is measured. There was nothing to measure.
このことより、曲がりや反りを抑止するために必要な圧延機の圧下設定の微調整ができないという問題や、下工程（精整工程）において、別途、曲がりや反りを測定する装置が必要であったり、作業者が人力で測定又は検査することが必要になるという問題があった。 This makes it impossible to finely adjust the rolling mill reduction setting necessary to suppress bending and warping, and a separate device for measuring bending and warping is required in the lower process (the refining process). In addition, there is a problem that it is necessary for an operator to measure or inspect manually.
本発明は、上記のような問題を解決するためになされたものであり、Ｈ形鋼の長手方向の形状（曲がり、反り）を圧延ラインで走行中に測定することができるＨ形鋼の形状測定方法を提供することを目的とするものである。 The present invention has been made in order to solve the above-described problems, and the shape of the H-section steel capable of measuring the shape (bending, warping) in the longitudinal direction of the H-section steel while traveling on the rolling line. The object is to provide a measurement method.
上記課題を解決するために、本発明は以下の特徴を有する。 In order to solve the above problems, the present invention has the following features.
［１］Ｈ形鋼の走行方向に直交する水平方向に所定の間隔を開けて一対の距離センサを配し、走行中のＨ形鋼に対して、一方の距離センサで一方のフランジ外面までの距離を測定し、他方の距離センサで他方のフランジ外面までの距離を測定し、それらの測定値から当該Ｈ形鋼の曲がり量を検出するＨ形鋼の形状測定方法であって、
Ｈ形鋼の長手方向の所定区間に渡って、前記一対の距離センサでそれぞれのフランジ外面までの距離を測定し、その測定値から長手方向の各測定位置におけるウェブ高さ中央位置を算出し、算出した長手方向の各測定位置におけるウェブ高さ中央位置のデータについて、前記所定区間の開始位置と終了位置のデータを直線で結んで１次近似直線を求めるとともに、前記所定区間の各データを２次曲線で近似して２次近似曲線を求め、前記１次近似直線と前記２次近似曲線との前記所定区間の偏差から当該Ｈ形鋼の曲がり量を算出することを特徴とするＨ形鋼の形状測定方法。
[1] A pair of distance sensors are arranged at a predetermined interval in a horizontal direction perpendicular to the traveling direction of the H-section steel, and one distance sensor is used to reach one flange outer surface with respect to the traveling H-section steel. A method for measuring the shape of an H-section steel, which measures a distance, measures the distance to the outer surface of the other flange with the other distance sensor, and detects the bending amount of the H-section steel from those measured values.
Over a predetermined section in the longitudinal direction of the H-section steel, the distance to each flange outer surface is measured by the pair of distance sensors, and the web height center position at each measurement position in the longitudinal direction is calculated from the measured value. For the data of the web height center position at each calculated measurement position in the longitudinal direction, the data of the start position and the end position of the predetermined section are connected by a straight line to obtain a primary approximate line, and each data of the predetermined section is 2 A H-shaped steel characterized in that a second-order approximate curve is obtained by approximation with a second-order curve, and the bending amount of the H-section steel is calculated from the deviation of the predetermined section between the first-order approximate straight line and the second-order approximate curve. Shape measurement method.
［２］前記所定区間の中央部における偏差を当該Ｈ形鋼の曲がり量とすることを特徴とする前記［１］に記載のＨ形鋼の形状測定方法。 [2] The method for measuring the shape of the H-section steel according to [1], wherein a deviation at a central portion of the predetermined section is set as a bending amount of the H-section steel.
［３］前記所定区間で絶対値が最大となる偏差を当該Ｈ形鋼の曲がり量とすることを特徴とする前記［１］に記載のＨ形鋼の形状測定方法。 [3] The method for measuring the shape of the H-section steel according to [1], wherein a deviation having the maximum absolute value in the predetermined section is set as a bending amount of the H-section steel.
［４］Ｈ形鋼の走行方向に直交する垂直方向に所定の間隔を開けて一対の距離センサを配し、走行中のＨ形鋼に対して、上方の距離センサでウェブ上面までの距離を測定し、下方の距離センサでウェブ下面までの距離を測定し、それらの測定値から当該Ｈ形鋼の反り量を検出するＨ形鋼の形状測定方法であって、
Ｈ形鋼の長手方向の所定区間に渡って、前記一対の距離センサでそれぞれウェブ上面とウェブ下面までの距離を測定し、その測定値から長手方向の各測定位置におけるウェブ厚さ中央位置を算出し、算出した長手方向の各測定位置におけるウェブ厚さ中央位置のデータについて、前記所定区間の開始位置と終了位置のデータを直線で結んで１次近似直線を求めるとともに、前記所定区間の各データを２次曲線で近似して２次近似曲線を求め、前記１次近似直線と前記２次近似曲線との前記所定区間の偏差から当該Ｈ形鋼の反り量を算出することを特徴とするＨ形鋼の形状測定方法。
[4] A pair of distance sensors are arranged in the vertical direction perpendicular to the running direction of the H-section steel, and the distance to the upper surface of the web is measured by the upper distance sensor for the running H-section steel. It is a shape measuring method of H-section steel that measures the distance to the lower surface of the web with a lower distance sensor and detects the amount of warpage of the H-section steel from those measured values,
The distance between the web upper surface and the web lower surface is measured with the pair of distance sensors over a predetermined section in the longitudinal direction of the H-section steel, and the web thickness center position at each measurement position in the longitudinal direction is calculated from the measured values. Then, for the data of the web thickness center position at each calculated measurement position in the longitudinal direction, the first approximate line is obtained by connecting the start position and end position data of the predetermined section with a straight line, and each data of the predetermined section Is approximated by a quadratic curve to obtain a quadratic approximate curve, and the amount of warpage of the H-section steel is calculated from the deviation of the predetermined interval between the primary approximate line and the secondary approximate curve. Shape measuring method for shape steel.
［５］前記所定区間の中央部における偏差を当該Ｈ形鋼の反り量とすることを特徴とする前記［４］に記載のＨ形鋼の形状測定方法。 [5] The method for measuring the shape of the H-section steel according to [4], wherein a deviation at a central portion of the predetermined section is set as a warp amount of the H-section steel.
［６］前記所定区間で絶対値が最大となる偏差を当該Ｈ形鋼の反り量とすることを特徴とする前記［４］に記載のＨ形鋼の形状測定方法。 [6] The shape measuring method for H-section steel according to [4], wherein a deviation having the maximum absolute value in the predetermined section is set as a warp amount of the H-section steel.
本発明においては、水平方向又は垂直方向に配した一対の距離センサを用いて、走行中のＨ形鋼を所定区間に渡って測定し、その測定結果に基づいて、当該Ｈ形鋼の長手方向の形状（曲がり、反り）を検出するようにしているので、作業員の人力による測定や検査が不要となる。また、曲がりや反りの検出結果を次の圧延材に対する圧延機の圧下設定にフィードバックすることが可能となり、品質向上の効果がある。 In the present invention, using a pair of distance sensors arranged in the horizontal direction or the vertical direction, the running H-section steel is measured over a predetermined section, and based on the measurement result, the longitudinal direction of the H-section steel is measured. Since the shape (bend, warp) is detected, it is not necessary to perform measurement and inspection by the human power of the worker. Moreover, it becomes possible to feed back the detection results of bending and warping to the rolling mill reduction setting for the next rolled material, and there is an effect of improving quality.
本発明の一実施形態を図面に基づいて説明する。 An embodiment of the present invention will be described with reference to the drawings.
図２は、この実施形態において用いる、走行中のＨ形鋼を測定するための走間寸法測定装置の概要図である。 FIG. 2 is a schematic view of a running dimension measuring apparatus for measuring the running H-section steel used in this embodiment.
図２に示すように、この実施形態において用いる走間寸法測定装置１１では、門型の架台１２に左右１組のＣフレーム１３が取り付けられており、それぞれのＣフレーム１３に、上下１対の２次元レーザ距離計Ａ１、Ａ２（又は、Ａ３、Ａ４）と、上下１対の１次元レーザ距離計Ｂ１、Ｂ２（又は、Ｂ３、Ｂ４）が搭載されているとともに、左右のＣフレーム１３に、左右１対となる１次元レーザ距離計Ｃ１、Ｃ２がそれぞれ搭載されている。 As shown in FIG. 2, in the running dimension measuring device 11 used in this embodiment, a pair of left and right C frames 13 are attached to a portal frame 12, and a pair of upper and lower sides is attached to each C frame 13. Two-dimensional laser distance meters A1 and A2 (or A3 and A4) and a pair of upper and lower one-dimensional laser distance meters B1 and B2 (or B3 and B4) are mounted, and left and right C frames 13 A pair of one-dimensional laser distance meters C1 and C2 is mounted.
そして、２次元レーザ距離計Ａ１、Ａ２（及び、Ａ３、Ａ４）によってフランジ幅及び脚長（中心偏り）を測定し、１次元レーザ距離計Ｂ１、Ｂ２（及び、Ｂ３、Ｂ４）によってウェブ厚を測定し、１次元レーザ距離計Ｃ１、Ｃ２によってウェブ高さを測定することができるようになっている。 The flange width and leg length (center deviation) are measured by the two-dimensional laser distance meters A1, A2 (and A3, A4), and the web thickness is measured by the one-dimensional laser distance meters B1, B2 (and B3, B4). The web height can be measured by the one-dimensional laser distance meters C1 and C2.
なお、測定するＨ形鋼１０のサイズに対応して、昇降シリンダ１４と横行シリンダ１５で、Ｃフレーム１３の位置を調整できるようにしている。 The position of the C frame 13 can be adjusted by the elevating cylinder 14 and the traversing cylinder 15 in accordance with the size of the H-shaped steel 10 to be measured.
上記のように構成された走間寸法測定装置１１を用いて、Ｈ形鋼１０の長手方向の形状（曲がり、反り）を検出する手順を以下に述べる。 The procedure for detecting the longitudinal shape (bend, warp) of the H-section steel 10 using the running distance measuring device 11 configured as described above will be described below.
まず、曲がりの求め方について示す。ここでは、１次元レーザ距離計Ｃ１、Ｃ２を用いる。 First, how to find a bend is shown. Here, one-dimensional laser distance meters C1 and C2 are used.
（１）走行中のＨ形鋼１０に対して、左側の距離センサＣ１で左側のフランジ外面までの距離を測定し、右側の距離センサＣ２で右側のフランジ外面までの距離を測定し、左側の距離センサＣ１の測定値Ｌ１と右側の距離センサＣ２の測定値Ｌ２から、下記１式によって、ウェブ高さＷを算出する。すなわち、
Ｗ＝ＳＷ−（Ｌ１＋Ｌ２） ……１式
ここで、ＳＷは、距離センサＣ１と距離センサＣ２の間隔である。
(1) For the running H-section steel 10, the distance to the left flange outer surface is measured by the left distance sensor C1, and the distance to the right flange outer surface is measured by the right distance sensor C2. From the measured value L1 of the distance sensor C1 and the measured value L2 of the right distance sensor C2, the web height W is calculated by the following one equation. That is,
W = SW− (L1 + L2) (1) Here, SW is an interval between the distance sensor C1 and the distance sensor C2.
（２）次に、距離センサＣ１、Ｃ２のいずれか一方の測定値に、ここでは、距離センサＣ１の測定値Ｌ１に、上記（１）で求めたウェブ高さＷの１／２を加える。これによって、距離センサＣ１からウェブ高さ中央までの距離（ウェブ高さ中央位置）Ｍが求まる。すなわち、
Ｍ＝Ｌ１＋Ｗ／２ ……２式
となる。
(2) Next, ½ of the web height W obtained in (1) above is added to the measured value L1 of the distance sensor C1 here, to the measured value of one of the distance sensors C1 and C2. Thereby, a distance (web height center position) M from the distance sensor C1 to the center of the web height is obtained. That is,
M = L1 + W / 2 (2 formulas)
（３）上記（１）、（２）を、曲がりを求めたい長手方向の所定区間（曲がり算出区間）に渡って、所定のサンプリングピッチで行う。これによって、各サンプリングタイミングｉ＝1〜ｎにおいて、長手方向の各測定位置Ｌ（ｉ）でのウェブ高さ中央位置Ｍ（ｉ）が求まる。なお、長手方向の各測定位置Ｌ（ｉ）は、開始位置を原点にした長手方向の位置であり、例えば、Ｈ形鋼を搬送する搬送ロールの回転信号（パルス信号）や搬送速度とサンプリングピッチから求める。図３は、その状況を示したものであり、ここでは、曲がり算出区間として、クロップを除いた長手方向先端の５ｍの区間で測定している。データサンプリングは、搬送ロールの回転信号に同期しており、長手方向空間分解能は７０ｍｍである。 (3) The above (1) and (2) are performed at a predetermined sampling pitch over a predetermined section (bending calculation section) in the longitudinal direction for which the bending is to be obtained. Thereby, at each sampling timing i = 1 to n, the web height center position M (i) at each measurement position L (i) in the longitudinal direction is obtained. Each measurement position L (i) in the longitudinal direction is a position in the longitudinal direction with the start position as the origin. For example, a rotation signal (pulse signal), a conveyance speed, and a sampling pitch of a conveyance roll that conveys H-section steel Ask from. FIG. 3 shows the situation. In this example, the bending calculation section is measured in a section of 5 m at the front end in the longitudinal direction excluding the crop. The data sampling is synchronized with the rotation signal of the transport roll, and the longitudinal spatial resolution is 70 mm.
（４）上記（３）で求めた長手方向の各測定位置Ｌ（ｉ）とその位置におけるウェブ高さ中央位置Ｍ（ｉ）のデータについて、図４に示すように、２次元座標で表示し、曲がり算出区間の開始位置Ｌ（１）のデータと終了位置Ｌ（ｎ）のデータを直線で結んで１次近似直線を求めるとともに、曲がり算出区間の各データを２次曲線で近似して２次近似曲線を求める。なお、開始位置Ｌ（１）のデータと終了位置Ｌ（ｎ）のデータは、それぞれ近傍のデータの平均値を用いてもよい。 (4) The data of each measurement position L (i) in the longitudinal direction obtained in (3) above and the web height center position M (i) at that position is displayed in two-dimensional coordinates as shown in FIG. The data of the start position L (1) and the data of the end position L (n) of the curve calculation section are connected by a straight line to obtain a primary approximate line, and each data of the curve calculation section is approximated by a quadratic curve. Find the next approximate curve. Note that the average value of neighboring data may be used for the data of the start position L (1) and the data of the end position L (n), respectively.
（５）そして、上記（４）で求めた１次近似直線と２次近似曲線について、曲がり算出区間の中央部であるＬ（ｎ）／２における両者の偏差（正負も含めて）を求める。すなわち、Ｈ形鋼の左右方向への変形を２次近似曲線で近似し、１次近似直線を基準線にして、その変形量を求めたことになる。したがって、この偏差が、この曲がり算出区間におけるＨ形鋼の曲がり量と曲がり方向となる。 (5) Then, with respect to the primary approximation line and the secondary approximation curve obtained in (4) above, the deviation (including positive and negative) of both at L (n) / 2, which is the central part of the bending calculation section, is obtained. That is, the deformation of the H-shaped steel in the left-right direction is approximated by a secondary approximate curve, and the amount of deformation is obtained using the primary approximate line as a reference line. Therefore, this deviation becomes the bending amount and bending direction of the H-section steel in this bending calculation section.
なお、上記において、左右の距離センサＣ１又はＣ２のいずれか一方の測定値Ｌ１又はＬ２のみを用いることも考えられるが、ウェブ高さＷの長手方向の寸法変動が曲がりとして含まれるため、この実施形態においては、測定値Ｌ１にウェブ高さＷの１／２を加えて、ウェブ高さ中央位置を求めている。 In the above, it is conceivable to use only one of the measured values L1 or L2 of the left and right distance sensors C1 or C2. However, since the dimensional variation in the longitudinal direction of the web height W is included as a bend, this implementation is performed. In the embodiment, the web height center position is obtained by adding 1/2 of the web height W to the measured value L1.
次に、反りの求め方について示す。ここでは、１次元レーザ距離計Ｂ１、Ｂ２を用いる。 Next, how to obtain warpage will be described. Here, one-dimensional laser distance meters B1 and B2 are used.
（６）走行中のＨ形鋼１０に対して、上方の距離センサＢ１でウェブ上面までの距離を測定し、下方の距離センサＢ２でウェブ下面までの距離を測定し、上方の距離センサＢ１の測定値Ｌ３と上方の距離センサＢ２の測定値Ｌ４から、下記３式によって、ウェブ厚さｔ１を算出する。すなわち、
ｔ１＝ＤＷ−（Ｌ３＋Ｌ４） ……３式
ここで、ＤＷは、距離センサＢ１と距離センサＢ２の間隔である。
(6) For the running H-section steel 10, the distance to the upper surface of the web is measured by the upper distance sensor B1, the distance to the lower surface of the web is measured by the lower distance sensor B2, and the upper distance sensor B1 From the measured value L3 and the measured value L4 of the upper distance sensor B2, the web thickness t1 is calculated by the following three equations. That is,
t1 = DW− (L3 + L4) (3) Here, DW is an interval between the distance sensor B1 and the distance sensor B2.
（７）次に、距離センサＢ１、Ｂ２のいずれか一方の測定値に、ここでは、距離センサＢ１の測定値Ｌ３に、上記（６）で求めたウェブ厚さｔ１の１／２を加える。これによって、距離センサＢ１からウェブ厚さ中央までの距離（ウェブ厚さ中央位置）Ｒが求まる。すなわち、
Ｒ＝Ｌ３＋ｔ１／２ ……４式
となる。
(7) Next, ½ of the web thickness t1 obtained in the above (6) is added to the measured value L3 of the distance sensor B1 to one of the measured values of the distance sensors B1 and B2. Thereby, the distance (web thickness center position) R from the distance sensor B1 to the center of the web thickness is obtained. That is,
R = L3 + t1 / 2 (4 formulas)
（８）上記（６）、（７）を、反りを求めたい長手方向の所定区間（反り算出区間）に渡って、所定のサンプリングピッチで行う。これによって、各サンプリングタイミングｉ＝1〜ｎにおいて、長手方向の各測定位置Ｌ（ｉ）でのウェブ厚さ中央位置Ｒ（ｉ）が求まる。なお、長手方向の各測定位置Ｌ（ｉ）は、開始位置を原点にした長手方向の位置であり、例えば、Ｈ形鋼を搬送する搬送ロールの回転信号（パルス信号）や搬送速度とサンプリングピッチから求める。 (8) The above (6) and (7) are performed at a predetermined sampling pitch over a predetermined section (warp calculation section) in the longitudinal direction for which warpage is to be obtained. Thereby, at each sampling timing i = 1 to n, the web thickness center position R (i) at each measurement position L (i) in the longitudinal direction is obtained. Each measurement position L (i) in the longitudinal direction is a position in the longitudinal direction with the start position as the origin. For example, a rotation signal (pulse signal), a conveyance speed, and a sampling pitch of a conveyance roll that conveys H-section steel Ask from.
（９）上記（８）で求めた長手方向の各測定位置Ｌ（ｉ）とその位置におけるウェブ厚さ中央位置Ｒ（ｉ）のデータについて、図５に示すように、２次元座標で表示し、反り算出区間の開始位置Ｌ（１）のデータと終了位置Ｌ（ｎ）のデータを直線で結んで１次近似直線を求めるとともに、反り算出区間の各データを２次曲線で近似して２次近似曲線を求める。なお、開始位置Ｌ（１）のデータと終了位置Ｌ（ｎ）のデータは、それぞれ近傍のデータの平均値を用いてもよい。 (9) The data of each measurement position L (i) in the longitudinal direction obtained in (8) above and the web thickness center position R (i) at that position is displayed in two-dimensional coordinates as shown in FIG. The first approximate line is obtained by connecting the data of the start position L (1) and the end position L (n) of the warp calculation section with a straight line, and each data of the warp calculation section is approximated by a quadratic curve. Find the next approximate curve. Note that the average value of neighboring data may be used for the data at the start position L (1) and the data at the end position L (n), respectively.
（１０）そして、上記（９）で求めた１次近似直線と２次近似曲線について、反り算出区間の中央部であるＬ（ｎ）／２における両者の偏差（正負も含めて）を求める。すなわち、Ｈ形鋼の上下方向への変形を２次近似曲線で近似し、１次近似直線を基準線にして、その変形量を求めたことになる。したがって、この偏差が、この反り算出区間におけるＨ形鋼の反り量と反り方向となる。 (10) Then, regarding the primary approximate line and the secondary approximate curve obtained in (9) above, the deviation (including positive and negative) of both at L (n) / 2, which is the central part of the warp calculation section, is obtained. That is, the deformation in the vertical direction of the H-section steel is approximated by a secondary approximate curve, and the amount of deformation is obtained using the primary approximate line as a reference line. Therefore, this deviation becomes the warp amount and warp direction of the H-section steel in this warp calculation section.
なお、上記において、上下の距離センサＢ１又はＢ２のいずれか一方の測定値Ｌ３又はＬ４のみを用いることも考えられるが、ウェブ厚さｔ１の長手方向の寸法変動が反りとして含まれるため、この実施形態においては、測定値Ｌ３にウェブ厚さｔ１の１／２を加えて、ウェブ厚さ中央位置を求めている。 In the above, it is conceivable to use only the measured value L3 or L4 of either one of the upper and lower distance sensors B1 or B2. However, since the dimensional variation in the longitudinal direction of the web thickness t1 is included as a warp, this implementation is performed. In the embodiment, the web thickness center position is obtained by adding 1/2 of the web thickness t1 to the measured value L3.
そして、この実施形態に示したＨ形鋼の形状測定方法を実操業に適用したところ、作業員が人力で測定した結果と０．５〜１．０ｍｍの差であり、良好な結果であった。 And when the shape measuring method of the H-section steel shown in this embodiment was applied to actual operation, it was a difference of 0.5 to 1.0 mm from the result of measurement by human power, which was a good result. .
なお、上記においては、曲がり算出区間又は反り算出区間の中央部の偏差を曲がり量又は反り量としているが、曲がり算出区間又は反り算出区間で絶対値が最大となる偏差を曲がり量又は反り量として管理する場合でも同様に適用することができる。 In the above, the deviation at the center of the bending calculation section or the warp calculation section is the bending amount or the warping amount, but the deviation having the maximum absolute value in the bending calculation section or the warp calculation section is the bending amount or the warping amount. The same applies to management.
このようにして、この実施形態においては、左右方向に配した一対の距離センサＣ１、Ｃ２あるいは上下方向に配した一対の距離センサＢ１、Ｂ２を用いて、走行中のＨ形鋼１０を所定の算出区間に渡って測定し、その測定結果に基づいて、Ｈ形鋼１０の長手方向の形状（曲がり、反り）を算出するようにしているので、作業員の人力による測定や検査が不要となる。また、曲がりや反りの検出結果を次の圧延材に対する圧延機の圧下設定にフィードバックすることが可能となり、品質向上の効果がある。 Thus, in this embodiment, the running H-section steel 10 is set to a predetermined position using a pair of distance sensors C1, C2 arranged in the left-right direction or a pair of distance sensors B1, B2 arranged in the up-down direction. Since measurement is performed over the calculation section and the shape (bending, warping) in the longitudinal direction of the H-section steel 10 is calculated based on the measurement result, measurement or inspection by the human power of the worker becomes unnecessary. . Moreover, it becomes possible to feed back the detection results of bending and warping to the rolling mill reduction setting for the next rolled material, and there is an effect of improving quality.
１０ Ｈ形鋼
１１ 走間寸法測定装置
１２ 門型の架台
１３ Ｃフレーム
１４ 昇降シリンダ
１５ 横行シリンダ
Ａ１、Ａ２、Ａ３、Ａ４ ２次元レーザ距離計
Ｂ１、Ｂ２、Ｂ３、Ｂ４ １次元レーザ距離計
Ｃ１、Ｃ２ １次元レーザ距離計
10 H-section steel 11 Running distance measuring device 12 Portal frame 13 C frame 14 Elevating cylinder 15 Traverse cylinder A1, A2, A3, A4 Two-dimensional laser rangefinder B1, B2, B3, B4 One-dimensional laser rangefinder C1, C2 One-dimensional laser rangefinder
Claims (6)
Ｈ形鋼の長手方向の所定区間に渡って、前記一対の距離センサでそれぞれのフランジ外面までの距離を測定し、その測定値から長手方向の各測定位置におけるウェブ高さ中央位置を算出し、算出した長手方向の各測定位置におけるウェブ高さ中央位置のデータについて、前記所定区間の開始位置と終了位置のデータを直線で結んで１次近似直線を求めるとともに、前記所定区間の各データを２次曲線で近似して２次近似曲線を求め、前記１次近似直線と前記２次近似曲線との前記所定区間の偏差から当該Ｈ形鋼の曲がり量を算出することを特徴とするＨ形鋼の形状測定方法。 A pair of distance sensors are arranged at a predetermined interval in the horizontal direction perpendicular to the running direction of the H-section steel, and the distance to one flange outer surface is measured with one distance sensor for the running H-section steel. And measuring the distance to the outer surface of the other flange with the other distance sensor, and detecting the bending amount of the H-section steel from those measured values,
Over a predetermined section in the longitudinal direction of the H-section steel, the distance to each flange outer surface is measured by the pair of distance sensors, and the web height center position at each measurement position in the longitudinal direction is calculated from the measured value. For the data of the web height center position at each calculated measurement position in the longitudinal direction, the data of the start position and the end position of the predetermined section are connected by a straight line to obtain a primary approximate line, and each data of the predetermined section is 2 A H-shaped steel characterized in that a second-order approximate curve is obtained by approximation with a second-order curve, and the bending amount of the H-section steel is calculated from the deviation of the predetermined section between the first-order approximate straight line and the second-order approximate curve. Shape measurement method.
Ｈ形鋼の長手方向の所定区間に渡って、前記一対の距離センサでそれぞれウェブ上面とウェブ下面までの距離を測定し、その測定値から長手方向の各測定位置におけるウェブ厚さ中央位置を算出し、算出した長手方向の各測定位置におけるウェブ厚さ中央位置のデータについて、前記所定区間の開始位置と終了位置のデータを直線で結んで１次近似直線を求めるとともに、前記所定区間の各データを２次曲線で近似して２次近似曲線を求め、前記１次近似直線と前記２次近似曲線との前記所定区間の偏差から当該Ｈ形鋼の反り量を算出することを特徴とするＨ形鋼の形状測定方法。 A pair of distance sensors are arranged at predetermined intervals in the vertical direction perpendicular to the running direction of the H-section steel, and the distance to the upper surface of the web is measured with the upper distance sensor for the running H-section steel, A method for measuring the shape of the H-section steel, which measures the distance to the lower surface of the web with a lower distance sensor and detects the amount of warpage of the H-section steel from the measured values,
The distance between the web upper surface and the web lower surface is measured with the pair of distance sensors over a predetermined section in the longitudinal direction of the H-section steel, and the web thickness center position at each measurement position in the longitudinal direction is calculated from the measured values. Then, for the data of the web thickness center position at each calculated measurement position in the longitudinal direction, the first approximate line is obtained by connecting the start position and end position data of the predetermined section with a straight line, and each data of the predetermined section Is approximated by a quadratic curve to obtain a quadratic approximate curve, and the amount of warpage of the H-section steel is calculated from the deviation of the predetermined interval between the primary approximate line and the secondary approximate curve. Shape measuring method for shape steel.
The method for measuring the shape of an H-section steel according to claim 4, wherein a deviation having a maximum absolute value in the predetermined section is set as a warpage amount of the H-section steel.
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