JP2014208370A - Device and method for correcting shape steel, and equipment and method for manufacturing shape steel - Google Patents

Device and method for correcting shape steel, and equipment and method for manufacturing shape steel Download PDF

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JP2014208370A
JP2014208370A JP2013272072A JP2013272072A JP2014208370A JP 2014208370 A JP2014208370 A JP 2014208370A JP 2013272072 A JP2013272072 A JP 2013272072A JP 2013272072 A JP2013272072 A JP 2013272072A JP 2014208370 A JP2014208370 A JP 2014208370A
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steel
bending
shape steel
shape
flange
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JP5929892B2 (en
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高嶋 由紀雄
Yukio Takashima
由紀雄 高嶋
山内 亮太
Ryota Yamauchi
亮太 山内
健太郎 平山
Kentaro Hirayama
健太郎 平山
瀬戸 聡
Satoshi Seto
聡 瀬戸
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JFE Steel Corp
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JFE Steel Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B21D3/05Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes rectangular to the path of the work

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for correcting shape steel, which efficiently remove the bend and camber of shape steel having a web and a flange, while suppressing generation of residual strain, and equipment and a method for manufacturing the shape steel.SOLUTION: A shape steel correction device 1 comprises: a bend correction machine 2 for correcting a bend of H-shaped steel 10 by rolling a flange 12; and a camber correction machine 3 for correcting a camber of the H-shaped steel 10 by repeating a bend of a web 11. The bend correction machine 2 is arranged on an upstream side, and the camber correction machine 3 is arranged on a downstream side. An interval between the bend correction machine 2 and the camber correction machine 3 is set longer than the length of the H-shaped steel 10.

Description

本発明は、ウェブ及びフランジを有する形鋼の曲がり及び反りを除去して矯正する形鋼の矯正装置及び矯正方法、並びに、曲がり量及び反り量を低減した形鋼の製造を可能とした形鋼の製造設備及び製造方法に関する。   The present invention relates to a straightening device and straightening method for straightening a shape steel having a web and a flange by removing the bending and warping, and a shape steel capable of producing a shape steel with a reduced amount of bending and warpage. The present invention relates to a manufacturing facility and a manufacturing method.

H形鋼に代表されるウェブ及びフランジを有する形鋼は、鋼板の溶接組立や熱間圧延で製造されているが、製造工程において加熱や冷却、塑性変形が不均一になったことが原因で長手方向の全体又は一部に曲がりや反りが発生し、まっすぐな製品が得られない場合がある。また、曲がりと反りが複合した捩れを有する形状不良品が発生する場合もある。このような曲がりや反りを除去し、まっすぐな製品とするため、一般には製品出荷前に冷間矯正が行われる。   Shaped steels with webs and flanges typified by H-shaped steel are manufactured by welding assembly and hot rolling of steel plates, but due to non-uniform heating, cooling and plastic deformation in the manufacturing process. In some cases, the whole or part of the longitudinal direction is bent or warped, and a straight product may not be obtained. In addition, a defective product having a twist in which bending and warping are combined may occur. In order to remove such bends and warpage and make a straight product, cold correction is generally performed before product shipment.

なお、本発明においては、曲がり及び反りは以下の通りとする。図9,10を参照しながらH形鋼を例にして説明すると、H形鋼10は、ウェブ11と、ウェブ11の高さ方向両側にそれぞれ設けられた2つのフランジ12,12と、を有しているが、ウェブ11が水平をなしフランジ12が鉛直をなす姿勢(以下「H姿勢」と記すこともある)において、曲がりとは、図9の(a)に示すように左右方向(ウェブ高さ方向)の湾曲δを意味し、反りとは、図10の(a)に示すように上下方向(フランジ幅方向)の湾曲Sを意味する。   In the present invention, bending and warping are as follows. 9 and 10, the H-section steel 10 has a web 11 and two flanges 12 and 12 provided on both sides of the web 11 in the height direction. However, in a posture in which the web 11 is horizontal and the flange 12 is vertical (hereinafter also referred to as “H posture”), the bending is the left-right direction (web) as shown in FIG. A curvature δ in the height direction is meant, and the warp means a curvature S in the vertical direction (flange width direction) as shown in FIG.

形鋼の矯正方法としては、特許文献1に開示されるようなプレスを用いて形鋼に曲げ応力を付与する方法や、特許文献2に開示されるような上下に千鳥状に配置した複数のローラを用いてウェブ曲げを繰り返すローラ矯正方法などが一般的である。また、特許文献3に開示のように、フランジを圧延して延伸させることにより、形鋼の曲がりを効率良く矯正する方法も知られている。   As a method of straightening the shape steel, a method of applying a bending stress to the shape steel using a press as disclosed in Patent Document 1 or a plurality of staggered arrangements as disclosed in Patent Document 2 are provided. A roller correction method that repeats web bending using a roller is generally used. Further, as disclosed in Patent Document 3, there is also known a method for efficiently correcting the bending of the shape steel by rolling and stretching the flange.

特許文献3に開示の方法について詳述すると、この矯正方法は、フランジをウェブとは反対側の面から押圧する外面ロールと、ウェブの高さ方向端部からウェブの両面側にそれぞれ張り出す両フランジ部(ここでは右フランジ部及び左フランジ部と言う)を有するフランジをウェブ側の面から押圧して、右フランジ部と左フランジ部とをそれぞれ外面ロールとの間で挟圧する一対の矯正ロールと、を用い、フランジ内外の対向する両ロールでフランジを圧延する曲がり矯正方法である。このような圧延による矯正方法は、成形された形鋼の局所的な曲がりを矯正できる。また、形鋼を搬送しながら矯正することができるので、矯正の処理効率の点で有利である。   The method disclosed in Patent Document 3 will be described in detail. This straightening method includes an outer surface roll that presses the flange from the surface opposite to the web, and both of the web rolls from both ends of the web in the height direction. A pair of straightening rolls that press a flange having flange portions (referred to here as a right flange portion and a left flange portion) from the surface on the web side and sandwich the right flange portion and the left flange portion between the outer surface rolls. And a bending straightening method in which the flange is rolled by both opposing rolls inside and outside the flange. Such a correction method by rolling can correct local bending of the shaped steel. Moreover, since it can correct | amend while conveying a shape steel, it is advantageous at the point of the processing efficiency of correction.

さらに、特許文献4には、ローラ矯正とフランジ圧延の両方を行う溶接H形鋼の矯正装置が開示されている。   Furthermore, Patent Document 4 discloses a welding H-section steel straightening device that performs both roller straightening and flange rolling.

特開2008−030090号公報JP 2008-030090 A 特開平8−174069号公報Japanese Patent Application Laid-Open No. H8-174069 特開2002−282943号公報JP 2002-282934 A 特開昭62−84829号公報JP-A-62-84829

しかしながら、特許文献1に開示されるようなプレスを用いる矯正方法では、形鋼の曲がりと反りの両方を矯正することができるものの、形鋼における圧下する長手方向位置を曲がりの状況に応じて選定してから適切な圧下力で圧下して矯正する必要があった。また、矯正に複数回の圧下を必要とする場合も多いため、矯正に要する時間が長いという問題があった。   However, the straightening method using a press as disclosed in Patent Document 1 can correct both bending and warping of the shape steel, but the longitudinal position of the shape steel to be reduced is selected according to the bending situation. After that, it was necessary to correct by reducing with an appropriate reduction force. Moreover, since there are many cases where a plurality of reductions are required for correction, there is a problem that the time required for correction is long.

一方、特許文献2に開示のローラを用いる矯正方法は、矯正に要する時間が短い上に様々な大きさの反りを除去することが可能な高能率な矯正方法である。しかしながら、曲がりに対しては矯正能力が低いという問題があった。特許文献2には水平ロールだけではなく竪ロールも設置したローラ矯正機が開示されているが、本発明者らの検討によれば、竪ロールを追加してもローラ矯正機の曲がり矯正能力は十分とは言えない場合が多い。   On the other hand, the straightening method using the roller disclosed in Patent Document 2 is a highly efficient straightening method capable of removing warping of various sizes in addition to a short time required for straightening. However, there is a problem that the correction ability is low for bending. Patent Document 2 discloses a roller straightening machine in which not only a horizontal roll but also a scissors roll is installed. According to the study by the present inventors, even if a scissor roll is added, the curling straightening ability of the roller straightening machine is not Often not enough.

他方、曲がりの曲率半径方向内側のフランジをローラにより圧延することでフランジを延伸させて曲がりを矯正する特許文献3の方法は、曲がり矯正効果が高く処理能力の面からも優れている。しかしながら、特許文献3に開示の矯正装置は、図8に示すようにフランジ内面を圧下する左右の矯正ロールに対して形鋼のフランジの左右位置がずれると、左右のフランジの延伸量に差が生じ、反りや捩れの形状不良が発生するという問題があった。   On the other hand, the method of patent document 3 which corrects a bending by extending | stretching a flange by rolling the flange inside the curvature radius direction of a bending with a roller is high, and is excellent also from the surface of processing capability. However, in the correction device disclosed in Patent Document 3, when the left and right positions of the flanges of the shape steel are displaced with respect to the left and right correction rolls that squeeze the flange inner surface as shown in FIG. As a result, there is a problem in that a defective shape such as warping or twisting occurs.

また、フランジ幅方向中央近傍にはウェブが存在するため、フランジ内面は十分に圧下できない場合が多い。このため、フランジの圧下される部分に長手方向の圧縮残留応力が発生するとともに、圧下されない部分に引張残留応力が発生する。そして、形鋼の使用時において切断や機械加工を行う際に前記残留応力が開放されて、形鋼に形状不良が発生するおそれがあった。   Further, since the web exists in the vicinity of the center in the flange width direction, the inner surface of the flange often cannot be sufficiently reduced. For this reason, a compressive residual stress in the longitudinal direction is generated in the portion of the flange that is reduced, and a tensile residual stress is generated in the portion that is not reduced. When the shape steel is used, when the cutting or machining is performed, the residual stress is released, and the shape steel may be defective in shape.

さらに、特許文献4の矯正装置は溶接形鋼の曲がりと反りの両方を効率よく矯正できるももの、溶接形鋼の連続製造ラインに適用されるものであり、製品長さ等に切断された形鋼を取り扱う設備での矯正にはそのまま適用できなかった。
そこで、本発明は、上記のような従来技術が有する問題点を解決し、ウェブ及びフランジを有する形鋼の曲がり及び反りを、残留応力の発生を抑制しつつ効率良く除去して矯正することが可能な形鋼の矯正装置及び矯正方法を提供すること、さらには、曲がり量及び反り量を低減した形鋼の製造を可能とした形鋼の製造設備及び製造方法を提供することを課題とする。
Furthermore, the straightening device of Patent Document 4 is one that can efficiently correct both the bending and warping of the welded shape steel, and is applied to a continuous production line of welded shape steel, and is cut into a product length or the like. It could not be applied as it is to straightening in equipment that handles steel.
Therefore, the present invention solves the problems of the prior art as described above, and is able to efficiently remove and correct the bending and warping of the shape steel having the web and the flange while suppressing the occurrence of residual stress. It is an object of the present invention to provide an apparatus and method for straightening a shape steel that can be shaped, and further to provide a shape steel production facility and a production method that can produce a shape steel with a reduced amount of bending and warpage. .

前記課題を解決するため、本発明の態様は、次のような構成からなる。すなわち、本発明の一態様に係る形鋼の矯正装置は、ウェブ及びフランジを有する形鋼の曲がり及び反りを矯正する矯正装置であって、前記フランジを圧延して前記形鋼の曲がりを矯正する曲がり矯正機と、前記形鋼の搬送方向に沿って千鳥状に配列した矯正ローラに前記ウェブを通過させて該形鋼に曲げを繰り返すことで前記形鋼の反りを矯正する反り矯正機と、を備え、前記形鋼の搬送方向の上流側に前記曲がり矯正機が、下流側に前記反り矯正機が配置され、前記曲がり矯正機と前記反り矯正機との間隔が矯正される形鋼の長さよりも広いことを特徴とする。   In order to solve the above-described problems, an aspect of the present invention has the following configuration. That is, the straightening device for a shaped steel according to one aspect of the present invention is a straightening device that corrects the bending and warping of the shaped steel having a web and a flange, and corrects the bending of the shaped steel by rolling the flange. A warp straightening machine, and a warp straightening machine that corrects the warpage of the shape steel by passing the web through the straightening rollers arranged in a staggered manner along the conveying direction of the shape steel and repeatedly bending the shape steel; A length of a section steel, wherein the bend straightening machine is arranged on the upstream side in the conveying direction of the shaped steel, the warp straightening machine is arranged on the downstream side, and the distance between the bend straightening machine and the warp straightening machine is straightened. It is characterized by being wider than that.

また、本発明の他の態様に係る形鋼の製造設備は、ウェブ及びフランジを有する形鋼の製造設備であって、鋼素材を前記ウェブ及び前記フランジを有する所定の断面形状の形鋼に成形する熱間圧延機と、前記形鋼を冷却する冷却床と、前記形鋼のフランジを圧延して前記形鋼の曲がりを矯正する曲がり矯正機と、前記形鋼の搬送方向に沿って千鳥状に配列した矯正ローラに前記ウェブを通過させて該形鋼に曲げを繰り返して前記形鋼の反りを矯正する反り矯正機と、を備え、前記製造設備における前記鋼素材あるいは前記形鋼の搬送方向の上流側から下流側に向けて、前記熱間圧延機、前記冷却床、前記曲がり矯正機、前記反り矯正機の順で配置され、前記曲がり矯正機と前記反り矯正機との間隔が矯正される形鋼の長さよりも広いことを特徴とする。   Moreover, the structural steel manufacturing equipment according to another aspect of the present invention is a structural steel manufacturing equipment having a web and a flange, and a steel material is formed into a structural steel having a predetermined cross-sectional shape having the web and the flange. A hot rolling mill, a cooling bed for cooling the shape steel, a bend straightening machine that rolls the flange of the shape steel to correct the bending of the shape steel, and a staggered shape along the conveying direction of the shape steel A warp straightening machine for correcting the warpage of the shape steel by repeatedly bending the shape steel by passing the web through the straightening rollers arranged in the direction, and the conveying direction of the steel material or the shape steel in the manufacturing facility From the upstream side to the downstream side, the hot rolling mill, the cooling bed, the bend straightening machine, and the warp straightening machine are arranged in this order, and the interval between the bend straightening machine and the warp straightening machine is corrected. It is characterized by being wider than the length of the shape steel To.

さらに、本発明の他の態様に係る形鋼の製造設備は、ウェブ及びフランジを有する形鋼の製造設備であって、鋼素材を前記ウェブ及び前記フランジを有する所定の断面形状の形鋼に成形する熱間圧延機と、前記形鋼を冷却する冷却床と、前記形鋼のフランジを圧延して前記形鋼の曲がりを矯正する曲がり矯正機と、前記形鋼の搬送方向に沿って千鳥状に配列した矯正ローラに前記ウェブを通過させて該形鋼に曲げを繰り返して前記形鋼の反りを矯正する反り矯正機と、を備え、前記製造設備における前記鋼素材あるいは前記形鋼の搬送方向の上流側から下流側に向けて、前記熱間圧延機、前記冷却床の順で配置され、前記冷却床の出側が、前記曲がり矯正機と前記反り矯正機との間の搬送装置に接続されてなることを特徴とする。   Furthermore, the structural steel manufacturing facility according to another aspect of the present invention is a structural steel manufacturing facility having a web and a flange, and a steel material is formed into a structural steel having a predetermined cross-sectional shape including the web and the flange. A hot rolling mill, a cooling bed for cooling the shape steel, a bend straightening machine that rolls the flange of the shape steel to correct the bending of the shape steel, and a staggered shape along the conveying direction of the shape steel A warp straightening machine for correcting the warpage of the shape steel by repeatedly bending the shape steel by passing the web through the straightening rollers arranged in the direction, and the conveying direction of the steel material or the shape steel in the manufacturing facility From the upstream side to the downstream side, the hot rolling mill and the cooling bed are arranged in this order, and the exit side of the cooling bed is connected to a conveying device between the bend straightening machine and the warp straightening machine. It is characterized by.

これらの形鋼の製造設備においては、前記冷却床と前記曲がり矯正機との間に、前記形鋼の曲がりを測定する曲がり測定装置を備えていてもよい。
さらに、本発明の他の態様に係る形鋼の矯正方法は、ウェブ及びフランジを有する形鋼の曲がり及び反りを矯正する矯正方法であって、前記フランジを圧延して前記形鋼の曲がりを矯正した後に、前記形鋼の搬送方向に沿って千鳥状に配列した矯正ローラに前記ウェブを通過させて該形鋼に曲げを繰り返して前記形鋼の反りを矯正することを特徴とする。
In these shape steel manufacturing facilities, a bending measuring device for measuring the bending of the shape steel may be provided between the cooling floor and the bending straightening machine.
Furthermore, a straightening method for a shape steel according to another aspect of the present invention is a straightening method for straightening a bending and warping of a shape steel having a web and a flange, and the bending of the shape steel is straightened by rolling the flange. After that, the web is passed through correction rollers arranged in a staggered manner along the conveying direction of the shape steel, and the bending of the shape steel is repeated to correct the warpage of the shape steel.

さらに、本発明の他の態様に係る形鋼の製造方法は、ウェブ及びフランジを有する形鋼の製造方法であって、熱間圧延により鋼素材を前記ウェブ及び前記フランジを有する所定の断面形状の形鋼に成形し、該所定の断面形状に成形された形鋼を200℃以下まで冷却した後に、前記フランジに圧延を施すことにより前記形鋼の曲がりを矯正し、次いで、前記形鋼の搬送方向に沿って千鳥状に配列した矯正ローラに前記ウェブを通過させて該形鋼に曲げを繰り返して前記形鋼の反りを矯正することを特徴とする。   Furthermore, the method for manufacturing a shape steel according to another aspect of the present invention is a method for manufacturing a shape steel having a web and a flange, and the steel material is formed into a predetermined cross-sectional shape having the web and the flange by hot rolling. After forming the shape steel and cooling the shape steel having the predetermined cross-sectional shape to 200 ° C. or less, the flange is rolled to correct the bending of the shape steel, and then the shape steel is conveyed. The web is passed through straightening rollers arranged in a staggered pattern along the direction, and the shape steel is bent repeatedly to correct the warpage of the shape steel.

本発明に係る形鋼の矯正装置は、フランジを圧延して形鋼の曲がりを矯正する曲がり矯正機と、形鋼の搬送方向に沿って千鳥状に配列した矯正ローラにウェブを通過させて該形鋼に曲げを繰り返して前記形鋼の反りを矯正する反り矯正機と、を備え、前記形鋼の搬送方向の上流側に前記曲がり矯正機が、下流側に前記反り矯正機が配置され、前記曲がり矯正機と前記反り矯正機との間隔が矯正される形鋼の長さよりも広いので、ウェブ及びフランジを有する形鋼の曲がり及び反りを、残留応力の発生を抑制しつつ効率良く除去して矯正することが可能である。   The shape steel straightening device according to the present invention passes a web through a bend straightening machine that rolls a flange to straighten the bend of the shape steel, and straightening rollers arranged in a staggered manner along the direction of conveyance of the shape steel. A warp straightening machine that repeatedly bends the shape steel to correct the warpage of the shape steel, and the warp straightening machine is arranged on the upstream side in the conveying direction of the shape steel, and the warp straightening machine is arranged on the downstream side, Since the distance between the bend straightening machine and the warp straightening machine is wider than the length of the shaped steel to be straightened, the bending and warping of the shaped steel having a web and a flange can be efficiently removed while suppressing the occurrence of residual stress. Can be corrected.

また、本発明に係る形鋼の製造設備は、鋼素材をウェブ及びフランジを有する所定の断面形状の形鋼に成形する熱間圧延機と、成形された形鋼を冷却する冷却床と、形鋼のフランジを圧延して前記形鋼の曲がりを矯正する曲がり矯正機と、形鋼の搬送方向に沿って千鳥状に配列した矯正ローラにウェブを通過させて形鋼に曲げを繰り返して形鋼の反りを矯正する反り矯正機と、を備え、製造設備における鋼素材あるいは形鋼の搬送方向の上流側から下流側に向けて、前記熱間圧延機、前記冷却床、前記曲がり矯正機、前記反り矯正機の順で配置され、前記曲がり矯正機と前記反り矯正機との間隔が矯正される形鋼の長さよりも広いので、熱間圧延により所定の断面形状に成形された形鋼が冷却され、曲がりや反りに対する温度の影響がほとんどなくなってから曲がり及び反りの矯正を行うことができ、最終的に良好な断面形状を有し、且つ、曲がり及び反りの量が小さい形鋼を製造することが可能である。   Moreover, the structural steel manufacturing equipment according to the present invention includes a hot rolling mill that forms a steel material into a structural steel having a predetermined cross-sectional shape having a web and a flange, a cooling bed that cools the molded structural steel, Shape steel by repeatedly bending the shape steel by passing the web through a bend straightening machine that rolls the flange of the steel to correct the bending of the shape steel, and straightening rollers arranged in a staggered manner along the direction of conveyance of the shape steel. A warp straightening machine that corrects the warpage of the steel material or the steel sheet in the production facility from the upstream side to the downstream side in the conveying direction, the hot rolling mill, the cooling bed, the bend straightening machine, Since the warp straightening machine is arranged in the order, and the distance between the bend straightening machine and the warp straightening machine is wider than the length of the shaped steel to be corrected, the shaped steel formed into a predetermined cross-sectional shape by hot rolling is cooled. The effect of temperature on bending and warping is mostly Can perform the bending and straightening of the warp from gone has finally good sectional shape, and, it is possible to produce a bending and warping amount is small section steel.

さらに、本発明に係る他の形鋼の製造設備は、製造設備における前記鋼素材あるいは前記形鋼の搬送方向の上流側から下流側に向けて、前記熱間圧延機、前記冷却床の順で配置され、前記冷却床の出側が、前記曲がり矯正機と前記反り矯正機との間の搬送装置に接続されているので、曲がり及び反りの量が小さい形鋼を製造することが可能であるとともに、冷却後の曲がりの程度が小さく曲がり矯正の必要のない形鋼については曲がり矯正機を通過させずに直接反り矯正機に導入することが可能であり、形鋼の製造能力の向上も可能となる。   Furthermore, the other structural steel manufacturing equipment according to the present invention is the above-mentioned hot rolling mill and the cooling bed in this order from the upstream side to the downstream side in the conveying direction of the steel material or the structural steel in the manufacturing equipment. Since the exit side of the cooling floor is connected to a conveying device between the bend straightening machine and the warp straightening machine, it is possible to produce a shape steel with a small amount of bend and warp. In addition, it is possible to introduce a shape steel that has a small degree of bending after cooling and does not require bending correction into the straightening straightening machine without passing through the bending straightening machine. Become.

さらに、本発明に係る形鋼の矯正方法は、フランジを圧延して形鋼の曲がりを矯正した後に、形鋼の搬送方向に沿って千鳥状に配列した矯正ローラにウェブを通過させて形鋼に曲げを繰り返して形鋼の反りを矯正するので、ウェブ及びフランジを有する形鋼の曲がり及び反りを、残留応力の発生を抑制しつつ効率良く除去して矯正することが可能である。 さらに、本発明に係る形鋼の製造方法は、熱間圧延により鋼素材をウェブ及びフランジを有する所定の断面形状の形鋼に成形し、所定の断面形状に成形された形鋼を200℃以下まで冷却した後に、フランジに圧延を施すことにより形鋼の曲がりを矯正し、次いで、形鋼の搬送方向に沿って千鳥状に配列した矯正ローラにウェブを通過させて形鋼に曲げを繰り返して形鋼の反りを矯正するので、熱間圧延により所定の断面形状に成形された形鋼が冷却され、曲がりや反りに対する温度の影響がほとんどなくなってから曲がり及び反りの矯正を行うことができ、最終的に良好な断面形状を有し、且つ、曲がり及び反りの量が小さい形鋼を製造することが可能である。   Furthermore, in the method for straightening a shaped steel according to the present invention, after rolling the flange to straighten the bending of the shaped steel, the web is passed through straightening rollers arranged in a staggered manner along the conveying direction of the shaped steel. Therefore, the bending and warping of the shape steel having the web and the flange can be efficiently removed and corrected while suppressing the occurrence of residual stress. Furthermore, in the method for manufacturing a shaped steel according to the present invention, a steel material is formed into a shaped steel having a predetermined cross-sectional shape having a web and a flange by hot rolling, and the shaped steel formed into a predetermined cross-sectional shape is 200 ° C. or lower. After cooling down, the bending of the shape steel is corrected by rolling the flange, and then the web is passed through the correction rollers arranged in a staggered manner along the direction of conveyance of the shape steel, and the bending of the shape steel is repeated. Since straightening of the shape steel is corrected, the shape steel formed into a predetermined cross-sectional shape by hot rolling is cooled, and the influence of temperature on bending and warping is almost eliminated, and the bending and warping can be corrected. Finally, it is possible to produce a section steel having a good cross-sectional shape and a small amount of bending and warping.

本発明に係る形鋼の矯正装置の一実施形態を説明する模式図である。It is a schematic diagram explaining one Embodiment of the straightening apparatus of the shaped steel which concerns on this invention. 図1の形鋼の矯正装置が備える曲がり矯正機の構造を説明する図である。It is a figure explaining the structure of the bending straightener with which the straightening apparatus of the shape steel of FIG. 1 is provided. 図1の形鋼の矯正装置が備える反り矯正機の構造を説明する図である。It is a figure explaining the structure of the curvature correction machine with which the shape steel straightening apparatus of FIG. 1 is provided. 図1の形鋼の矯正装置の設備配置の一例を示す模式的平面図である。It is a typical top view which shows an example of the equipment arrangement | positioning of the straightening apparatus of the shape steel of FIG. 図1の形鋼の矯正装置の設備配置の別の例を示す模式的平面図である。It is a schematic plan view which shows another example of the equipment arrangement | positioning of the straightening apparatus of the shaped steel of FIG. 形鋼の製造設備の設備配置の一例を示す模式的平面図である。It is a typical top view which shows an example of the equipment arrangement | positioning of the manufacturing equipment of a shape steel. 形鋼の製造設備の設備配置の別の例を示す模式的平面図である。It is a schematic plan view which shows another example of equipment arrangement | positioning of the manufacturing equipment of a shape steel. 曲がり矯正において、矯正ロールと形鋼のフランジとの左右位置がずれた状態を説明する図である。In bending correction, it is a figure explaining the state which the right-and-left position of the correction | amendment roll and the flange of a shape steel shifted. H形鋼の曲がりを説明する図である。It is a figure explaining the bending of H-section steel. H形鋼の反りを説明する図である。It is a figure explaining the curvature of H-section steel.

本発明に係る形鋼の矯正装置及び形鋼の矯正方法の実施の形態を、図面を参照しながら詳細に説明する。図1は、本発明に係る形鋼の矯正装置の一実施形態を説明する模式図である。また、図2は、図1の形鋼の矯正装置が備える曲がり矯正機の構造を説明する図であり、H形鋼を長手方向端部側から見た正面図である。さらに、図3は、図1の形鋼の矯正装置が備える反り矯正機の構造を説明する図であり、(a)はウェブを高さ方向端部側から見た模式図であり、(b)は搬送方向出側から見た模式図((a)のA−A矢視図)である。   DESCRIPTION OF EMBODIMENTS Embodiments of a shape steel straightening apparatus and a shape steel straightening method according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram for explaining an embodiment of a straightening device for shaped steel according to the present invention. FIG. 2 is a view for explaining the structure of the bending straightener provided in the straightening device for the shaped steel of FIG. 1, and is a front view of the H-shaped steel as viewed from the end in the longitudinal direction. 3 is a view for explaining the structure of the warp straightening machine provided in the straightening device for shaped steel in FIG. 1, and (a) is a schematic view of the web as viewed from the end in the height direction. ) Is a schematic diagram (a view taken along the line AA in FIG. 5A) viewed from the conveyance direction exit side.

図1の形鋼矯正装置1は、ウェブ11及びフランジ12,12を有するH形鋼10の曲がり及び反りを矯正する装置であり、H形鋼10を製造する形鋼の製造設備中に設置することができる。形鋼矯正装置1は、フランジ12を圧延してH形鋼10の曲がりを矯正する曲がり矯正機2と、ウェブ11に曲げを繰り返してH形鋼10の反りを矯正する反り矯正機3と、を備えており、形鋼の製造設備の上流側に曲がり矯正機2が配置され、下流側に反り矯正機3が配置されている。   The shape steel straightening device 1 of FIG. 1 is a device that corrects the bending and warping of the H-section steel 10 having the web 11 and the flanges 12, 12, and is installed in the shape-steel manufacturing facility for manufacturing the H-section steel 10. be able to. The shaped steel straightening device 1 includes a bending straightening machine 2 that rolls the flange 12 to straighten the bending of the H-shaped steel 10, a warping straightening machine 3 that repeats bending of the web 11 to straighten the bending of the H-shaped steel 10, and The bend straightening machine 2 is arranged on the upstream side of the manufacturing equipment for the shape steel, and the warp straightening machine 3 is arranged on the downstream side.

一般に、曲がり矯正と反り矯正では必要とする矯正処理時間が異なるため、矯正されるH形鋼10の長さよりも曲がり矯正機2と反り矯正機3との間隔が広くなるように曲がり矯正機2と反り矯正機3を配置することが好ましい。そこで、曲がり矯正機2と反り矯正機3との間には、H形鋼10を曲がり矯正機2から反り矯正機3に搬送するためのローラテーブル、搬送装置等を設置することが好ましい。このような配置にすれば、曲がり矯正中に形鋼の反りが大きくなっても、反り矯正機3の設定を変更することができるので、反り矯正の効果をより大きくすることができる。   In general, since the necessary correction processing time differs between the bending correction and the warp correction, the bending correction machine 2 so that the distance between the bending correction machine 2 and the warp correction machine 3 is wider than the length of the H-shaped steel 10 to be corrected. It is preferable to arrange the warp straightening machine 3. Therefore, it is preferable to install a roller table, a conveying device, and the like for conveying the H-section steel 10 from the bend straightening machine 2 to the bend straightening machine 3 between the bend straightening machine 2 and the warp straightening machine 3. With such an arrangement, even if the warpage of the shape steel increases during the bending correction, the setting of the warp correction machine 3 can be changed, so that the effect of the warp correction can be further increased.

鋼板の溶接組立や熱間圧延などの方法で製造されたH形鋼10は、曲がりや反りが生じている場合があるので、曲がり及び反りの一方又は両方が生じているH形鋼10は形鋼の製造設備の搬送ライン9によって形鋼矯正装置1に導入されるようになっている。H形鋼10は上流側の曲がり矯正機2によって曲がりが矯正された後、下流側の反り矯正機3に導入されて反りが矯正される。そして、曲がり及び反りが矯正されて所望の形状の製品とされたH形鋼10は、搬送ライン9によって出荷工程に搬送されるようになっている。   Since the H-section steel 10 manufactured by a method such as welding and assembling of a steel plate or hot rolling may be bent or warped, the H-section steel 10 having one or both of the bend and warpage is shaped. It is introduced into the shaped steel straightening device 1 by a conveying line 9 of a steel production facility. After the bending of the H-shaped steel 10 is corrected by the upstream bending correction machine 2, the H-shaped steel 10 is introduced into the downstream bending correction machine 3 to correct the bending. And the H-section steel 10 made into the product of a desired shape by correct | amending a curve and curvature is conveyed by the conveyance line 9 at a shipping process.

ここで、曲がり矯正機2と反り矯正機3について詳細に説明する。まず、曲がり矯正機2は、ロールを用いてフランジをH形鋼の長手方向に圧延する方式の矯正機を用いる。すなわち、図2に示すように、曲がり矯正機2は、フランジ12のウェブ11とは反対側の面(フランジ外面)に対向して配され、ロール軸21aの方向がフランジ幅方向とされて、ロールの外周面でフランジ12をフランジ外面側から支持する外面ロール21と、フランジ12のウェブ11側の面(フランジ内面)に対向して配され、ロール軸22aの方向がフランジ幅方向とされて、ウェブ11の高さ方向端部からそれぞれウェブ11の高さ方向と垂直に張り出す2つのフランジ部12a,12b(ここでは右フランジ部12a及び左フランジ部12bという)をロールの外周面でそれぞれ押圧する一対の内面ロール22,22と、を備えている。曲がりの曲率半径方向内側のフランジ12を外面ロール21と内面ロール22,22とで挟圧し、所定の圧延条件で圧延すれば、フランジ外面が延伸されるため、H形鋼10の曲がりが矯正される。   Here, the bend straightening machine 2 and the warp straightening machine 3 will be described in detail. First, the straightening machine 2 uses a straightening machine that uses a roll to roll the flange in the longitudinal direction of the H-section steel. That is, as shown in FIG. 2, the bending straightener 2 is arranged to face the surface of the flange 12 opposite to the web 11 (flange outer surface), and the direction of the roll shaft 21 a is the flange width direction, An outer surface roll 21 that supports the flange 12 from the outer surface side of the flange on the outer peripheral surface of the roll, and a surface on the web 11 side (flange inner surface) of the flange 12 are arranged opposite to each other, and the direction of the roll shaft 22a is the flange width direction. The two flange portions 12a and 12b (herein referred to as the right flange portion 12a and the left flange portion 12b) projecting perpendicularly to the height direction of the web 11 from the end portions in the height direction of the web 11 respectively on the outer peripheral surface of the roll And a pair of inner surface rolls 22 and 22 to be pressed. If the flange 12 inside the radius of curvature of the bend is sandwiched between the outer roll 21 and the inner rolls 22 and 22 and rolled under predetermined rolling conditions, the outer face of the flange is stretched, so that the bend of the H-section steel 10 is corrected. The

なお、本実施形態の曲がり矯正機2に用いる各ロール21,22の形状は、図2に示すものに限定されるものではない。例えば、フランジ12を圧延する各ロール21,22のロール径に任意の分布を付与してもよい。
次に、反り矯正機3について、図3を参照しながら説明する。反り矯正機3は、互いに平行をなして上流側から下流側へ一列に並ぶ複数のローラ31からなるローラ列を上下に2列備えている。これら2列のローラ列は、図1に示すように、各ローラ31の並び方向位置が互いにずれた状態で対向配置されている。すなわち、ローラ31をその回転軸方向端部側から見ると、2列のローラ列のローラ31は全体としてH形鋼10の搬送方向に沿って千鳥状に配置されている。
In addition, the shape of each roll 21 and 22 used for the bending straightener 2 of this embodiment is not limited to what is shown in FIG. For example, you may give arbitrary distribution to the roll diameter of each roll 21 and 22 which rolls the flange 12. FIG.
Next, the warp correction machine 3 will be described with reference to FIG. The warp straightening machine 3 is provided with two rows of upper and lower roller rows made up of a plurality of rollers 31 arranged in a row from the upstream side to the downstream side in parallel with each other. As shown in FIG. 1, these two roller rows are arranged so as to face each other in a state where the alignment direction positions of the rollers 31 are shifted from each other. That is, when the rollers 31 are viewed from the end in the rotational axis direction, the rollers 31 in the two roller rows are arranged in a staggered manner along the conveying direction of the H-section steel 10 as a whole.

この反り矯正機3にH形鋼10を導入し、H形鋼10の長手方向がローラ31の並び方向に沿うようにウェブ11を2列のローラ列の間に挟む。すると、一方のローラ列のローラ31と他方のローラ列のローラ31とに挟まれることにより、H形鋼10のウェブ11に曲げが行われる。そして、図3に示すように、H形鋼10を、2列のローラ列の間に挟まれた状態でローラ31の並び方向に沿って下流側に移動させることにより(すなわち、2列のローラ列の間を通過させることにより)、一方のローラ列のローラ31と他方のローラ列のローラ31とに複数回挟まれることとなるから、H形鋼10のウェブ11に曲げが繰り返されることとなる。   The H-section steel 10 is introduced into the warp straightening machine 3, and the web 11 is sandwiched between two rows of rollers so that the longitudinal direction of the H-section steel 10 is along the direction in which the rollers 31 are arranged. Then, the web 11 of the H-section steel 10 is bent by being sandwiched between the roller 31 of one roller row and the roller 31 of the other roller row. Then, as shown in FIG. 3, the H-section steel 10 is moved downstream along the arrangement direction of the rollers 31 while being sandwiched between the two rows of rollers (that is, the two rows of rollers). Since it is sandwiched a plurality of times between the roller 31 of one roller row and the roller 31 of the other roller row), the bending of the web 11 of the H-section steel 10 is repeated. Become.

このとき、ローラ31の並び方向位置が上流側のローラ31に挟まれた際には大きな曲げ変形が付与され、ローラ31の並び方向位置が下流側に向かうに従ってローラ31に挟まれた際に付与される曲げ変形量が徐々に小さくなるように設定しておけば、H形鋼10の反りを効率的に除去することが可能である。
反り矯正機3が備えるローラ31の個数は特に限定されるものではないが、一方のローラ列のローラ31と他方のローラ列のローラ31とに挟まれることにより、ウェブ11に3回以上繰り返して曲げが行われるような個数とすることが好ましい。すなわち、2列のローラ列のローラ31の合計数を5個以上とすることが好ましい。
At this time, a large bending deformation is applied when the alignment direction position of the rollers 31 is sandwiched between the upstream rollers 31, and is applied when the alignment direction position of the rollers 31 is sandwiched between the rollers 31 toward the downstream side. If the bending deformation amount to be set is set to be gradually reduced, the warpage of the H-section steel 10 can be efficiently removed.
The number of the rollers 31 provided in the warp correction machine 3 is not particularly limited, but the web 11 is repeated three times or more by being sandwiched between the rollers 31 of one roller row and the rollers 31 of the other roller row. The number is preferably such that bending is performed. That is, it is preferable that the total number of the rollers 31 in the two roller rows is 5 or more.

ここで、形鋼の曲がりを矯正した後に反りを矯正する理由について説明する。形鋼のフランジを圧延して曲がりを矯正する際には、図8に示すように、曲がり矯正機の2つの内面ロールの間隔の中心位置に対して形鋼の中心位置がフランジ幅方向にずれた状態になる場合がある。左右のフランジの圧延幅が異なる状態で形鋼の曲がりを矯正すると、左右のフランジの延伸量が異なる状態となるため、形鋼に反りを発生させる結果となるおそれがあった。したがって、曲がり矯正機の前後(形鋼の搬送方向の前後)にガイドローラ等を設け、上記のようなずれを防止することが重要であるが、ガイドローラを常に適切な位置に設定することは、工業的に困難な場合がある。   Here, the reason for correcting the warpage after correcting the bending of the shape steel will be described. When rolling the shape steel flange to correct the bending, as shown in FIG. 8, the center position of the shape steel is shifted in the flange width direction with respect to the center position of the interval between the two inner surface rolls of the bending straightening machine. It may become a state. When the bending of the shape steel is corrected in a state where the rolling widths of the left and right flanges are different, the stretch amount of the left and right flanges is different, which may result in warping of the shape steel. Therefore, it is important to provide guide rollers etc. before and after the bend straightening machine (before and after in the direction of conveyance of the shape steel) to prevent such deviation, but it is always necessary to set the guide rollers at an appropriate position. It may be difficult industrially.

そこで、曲がり矯正機2で形鋼の曲がりを除去した後に、反り矯正機3で反りを除去するという順序であれば、曲がり矯正によって形鋼に反りが発生しても、反り矯正後には反りのない形鋼が得られる。ローラによる反り矯正では形鋼の曲がり変化は小さいので、曲がり矯正機2で曲がりを除去しておけば、反り矯正機3で反り矯正を行った後も曲がりのない状態が保持される。   Therefore, if the warping straightening machine 2 removes the bending of the shape steel and then the warpage straightening machine 3 removes the warpage, even if the warping is caused by the straightening, the warping is corrected after the warping correction. No shape steel is obtained. Since the bending change of the shape steel is small in the warp correction by the roller, if the bending is removed by the bend straightening machine 2, the state without the bend is maintained even after the warp straightening machine 3 performs the warp straightening.

また、曲がり矯正を実施すると、フランジの圧延された部分が延伸するのに対し、ウェブ近傍の圧延されない部分は延伸しないため、フランジの圧延された部分に圧縮の長手方向残留応力が発生し、フランジの圧延されない部分に引張の長手方向残留応力が発生する。このような残留応力は、形鋼に穴空け、切断等の機械加工を施すと断面変形を引き起こす場合があり、機械加工後の形鋼に寸法不良が発生するおそれがある。しかしながら、曲がり矯正の後に反り矯正を実施すると、形鋼のフランジに繰り返し曲げ応力が付与される結果、上記の両残留応力を低減することができる。   Further, when the straightening is performed, the rolled portion of the flange is stretched, whereas the unrolled portion in the vicinity of the web is not stretched. Therefore, a compressive longitudinal residual stress is generated in the rolled portion of the flange. A tensile residual stress in the longitudinal direction is generated in the unrolled portion. Such residual stress may cause cross-sectional deformation when the shape steel is machined such as drilling or cutting, and there is a risk that dimensional defects will occur in the shape steel after machining. However, when the warp correction is performed after the bending correction, the bending stress is repeatedly applied to the flange of the shaped steel, so that both the above residual stresses can be reduced.

以上のように、本発明の矯正方法によれば、形鋼の曲がりと反りを効果的且つ効率的に除去することができる上に、残留応力も低減することが可能であるため、形鋼の製品品質も向上する。
なお、H形鋼10に生じる曲がり及び反りには種々のパターンがあり、例えば曲がりであれば、長手方向の全体の領域に曲がりが生じている曲がり形状パターンや、長手方向の一部の領域のみ(例えば端部のみ)に曲がりが生じている曲がり形状パターンがある。また、一方向の曲がりのみが生じる曲がり形状パターン(皿形、逆皿形)や、二方向の曲がりが生じる曲がり形状パターン(S字形)がある。さらに、いずれの曲がり形状パターンにおいても、その曲がり量は種々異なる。
As described above, according to the straightening method of the present invention, the bending and warping of the shape steel can be effectively and efficiently removed, and the residual stress can be reduced. Product quality is also improved.
Note that there are various patterns of bending and warping occurring in the H-shaped steel 10, for example, if bending, only a bent shape pattern in which bending occurs in the entire region in the longitudinal direction or only a part of the region in the longitudinal direction. There is a bent shape pattern in which a bend is generated (for example, only at an end). Further, there are a bent shape pattern (a dish shape or an inverted dish shape) in which only one direction of bending occurs, and a bent shape pattern (S shape) in which a bending in two directions occurs. Furthermore, the amount of bending varies in any bent shape pattern.

曲がり矯正機2においては、H形鋼10における曲がりが生じている長手方向領域、曲がり方向、及び曲がり量に応じて、曲がり矯正が行われるようになっている。例えば、曲がりが生じている長手方向領域、曲がり方向、及び曲がり量を曲がり測定装置によって測定し、その測定結果に基づいて曲がり矯正を実施するとよい。すなわち、曲がりが生じている長手方向領域、曲がり方向、及び曲がり量に応じて、圧延を施す長手方向領域、圧下率あるいは圧延荷重等の圧延条件が逐次変更されるようになっている。よって、曲がりが生じていない長手方向領域には圧延は施されないし、曲がりが生じていても、曲がりの曲率半径方向外側のフランジ12に対しては圧延は施されない。   In the bend straightening machine 2, the bend correction is performed according to the longitudinal direction region where the bend occurs in the H-section steel 10, the bend direction, and the bend amount. For example, the longitudinal region where the bending occurs, the bending direction, and the amount of bending may be measured by a bending measuring device, and the bending correction may be performed based on the measurement result. That is, rolling conditions such as a longitudinal region where rolling is performed, a rolling reduction or a rolling load are sequentially changed according to the longitudinal region where the bending occurs, the bending direction, and the amount of bending. Therefore, no rolling is applied to the longitudinal region where no bending occurs, and no rolling is applied to the flange 12 on the outer side in the radius direction of curvature even if bending occurs.

例えば、曲がり形状パターンがS字形である場合には、両フランジ12,12に対して圧延を施す必要があるので、曲がり矯正機2は、各フランジ12を圧延するための外面ロール21及び内面ロール22,22をそれぞれ備えていることが好ましい(すなわち、外面ロール21及び内面ロール22,22を2組備えていることが好ましい)。外面ロール21及び内面ロール22,22を1組備える曲がり矯正機2の場合には、一方のフランジ12を圧延した後にH形鋼10を転回させて、他方のフランジ12を圧延する必要がある。H形鋼10の転回については、H形鋼10の長手方向に沿う中心軸を回転軸として180°転回(裏返し)させてもよいし、ウェブ面に直交する中心軸を回転軸として180°転回(旋回)させてもよい。   For example, when the bent pattern is S-shaped, it is necessary to perform rolling on both flanges 12, 12. Therefore, the bending straightener 2 has an outer roll 21 and an inner roll for rolling each flange 12. 22 and 22 are preferably provided (that is, two sets of the outer roll 21 and the inner rolls 22 and 22 are preferably provided). In the case of the bending straightener 2 including one set of the outer roll 21 and the inner rolls 22, 22, it is necessary to roll the H-shaped steel 10 after rolling one flange 12 and roll the other flange 12. As for the turning of the H-section steel 10, it may be rotated 180 ° (turned over) with the central axis along the longitudinal direction of the H-section steel 10 as the rotation axis, or 180 ° rotation with the central axis orthogonal to the web surface as the rotation axis. (Turning) may be performed.

次に、曲がり矯正機2と反り矯正機3の配置について説明する。図4は、曲がり矯正機2と反り矯正機3が直列に配置された例であり、両者の間はローラテーブル、搬送装置等で形鋼を搬送することが好ましい。また、曲がり矯正機2と反り矯正機3との間隔は、矯正される形鋼の長さよりも広くすることが望ましい。
また、図5は、曲がり矯正機2と反り矯正機3が異なる搬送ライン9上に設置されている場合の例を示している。図5の場合は、2つの搬送ライン9が平行をなしているので、搬送ライン9に直交する方向に形鋼を移動させる搬送装置5を、曲がり矯正機2と反り矯正機3の間に設置することが好ましい。そうすれば、曲がり矯正機2と反り矯正機3での矯正作業が干渉することなく、効率的に矯正を実施することができる。
Next, arrangement | positioning of the curvature correction machine 2 and the curvature correction machine 3 is demonstrated. FIG. 4 is an example in which the bend straightening machine 2 and the warp straightening machine 3 are arranged in series, and it is preferable to transport the shape steel between them by a roller table, a transport device or the like. Moreover, it is desirable that the interval between the bending straightening machine 2 and the warp straightening machine 3 is wider than the length of the shape steel to be straightened.
Moreover, FIG. 5 has shown the example in case the curvature correction machine 2 and the curvature correction machine 3 are installed on the conveyance line 9 which is different. In the case of FIG. 5, since the two conveyance lines 9 are parallel, the conveyance device 5 that moves the shape steel in a direction orthogonal to the conveyance line 9 is installed between the bending straightening machine 2 and the warp straightening machine 3. It is preferable to do. If it does so, correction can be implemented efficiently, without the correction operation | work in the bending correction machine 2 and the curvature correction machine 3 interfering.

次に、本発明の実施形態に係る形鋼の製造設備及び形鋼の製造方法について説明する。図6は、本発明の実施形態に係る形鋼の製造設備を示す模式図である。この製造設備は、熱間圧延によるH形鋼の製造設備に、上述した形鋼矯正装置1を配置した実施形態を示している。H形鋼10は、例えば矩形断面の鋼片等を鋼素材として熱間圧延機30により熱間圧延が行われ、ウェブ11及びフランジ12を有する所定の断面形状(製品の断面形状)に成形されることにより製造される。熱間圧延機30は、図示しない加熱炉で加熱された鋼素材を圧延する複数の圧延機からなる圧延機群として構成されており、複数の圧延機間を被圧延材を搬送する搬送装置を有する。   Next, a section steel manufacturing facility and a section steel manufacturing method according to an embodiment of the present invention will be described. FIG. 6 is a schematic view showing a structural steel manufacturing facility according to an embodiment of the present invention. This manufacturing equipment has shown embodiment which has arrange | positioned the shape-steel correction apparatus 1 mentioned above to the manufacturing equipment of H-section steel by hot rolling. The H-section steel 10 is hot-rolled by a hot rolling mill 30 using, for example, a steel piece having a rectangular cross section as a steel material, and is formed into a predetermined cross-sectional shape (a cross-sectional shape of a product) having a web 11 and a flange 12. It is manufactured by. The hot rolling mill 30 is configured as a rolling mill group composed of a plurality of rolling mills for rolling a steel material heated in a heating furnace (not shown), and a conveying device that conveys a material to be rolled between the plurality of rolling mills. Have.

熱間圧延機30の下流側には、冷却床6が配置されている。冷却床6には、熱間圧延機30により所定の断面形状に成形された高温のH形鋼10が、搬送ライン9によって搬送され、この冷却床6において高温のH形鋼10に対して冷却が施される。
さらに、冷却床6の下流側には、上述した曲がり矯正機2と反り矯正機3とが、搬送方向にこの順で配置されている。
A cooling bed 6 is disposed on the downstream side of the hot rolling mill 30. A high-temperature H-section steel 10 formed into a predetermined cross-sectional shape by a hot rolling mill 30 is conveyed to the cooling floor 6 by a conveyance line 9, and the high-temperature H-section steel 10 is cooled in the cooling floor 6. Is given.
Further, on the downstream side of the cooling bed 6, the above-described bending straightening machine 2 and the warp straightening machine 3 are arranged in this order in the transport direction.

したがって、図6に示した形鋼の製造設備によれば、熱間圧延により鋼素材をウェブ11及びフランジ12を有する所定の断面形状のH形鋼10に成形し、所定の断面形状に成形されたH形鋼10を冷却した後に、フランジ12に圧延を施すことによりH形鋼10の曲がりを矯正し、次いで、H形鋼10のウェブ11に曲げを繰り返してH形鋼10の反りを矯正するという形鋼の製造方法を、上流側から下流側への一連の搬送中に適用することが可能となる。曲がり矯正機2と反り矯正機3との間隔が矯正される形鋼の長さよりも広いことから、曲がり矯正機2で形鋼の反りが変化しても、それに応じて反り矯正機3の設定を調整することができ、効果の高い矯正が可能である。   Therefore, according to the shape steel manufacturing facility shown in FIG. 6, the steel material is formed into a predetermined cross-sectional shape H-shaped steel 10 having the web 11 and the flange 12 by hot rolling, and is formed into a predetermined cross-sectional shape. After the H-shaped steel 10 is cooled, the flange 12 is rolled to correct the bending of the H-shaped steel 10, and then the web 11 of the H-shaped steel 10 is repeatedly bent to correct the warpage of the H-shaped steel 10. It becomes possible to apply the method of manufacturing a shaped steel to be performed during a series of conveyance from the upstream side to the downstream side. Since the distance between the bend straightening machine 2 and the warp straightening machine 3 is wider than the length of the shaped steel to be straightened, even if the bend straightening machine 2 changes its warp, the setting of the warp straightening machine 3 is set accordingly. Can be adjusted, and highly effective correction is possible.

この形鋼の製造方法によれば、熱間圧延された高温のH形鋼10が冷却され、曲がりや反りに対する温度の影響がほとんどなくなってから曲がりや反りを矯正しているので、曲がりや反りを矯正した後に、温度変化に伴う形状変化が発生することを防止できる。
なお、冷却床6においては、形鋼を200℃以下に冷却することが好ましい。これは、熱間圧延された形鋼が十分に冷却され、曲がりや反りに対する温度の影響がほとんどなくなってから矯正することが好ましいからである。200℃を超える温度の形鋼に対して曲がり矯正や反り矯正を実施すると、温度分布が残った状態で矯正が終了してしまうので、その後に室温まで冷却され温度分布がなくなるにしたがって、形鋼の断面形状不良が発生する場合がある。
According to this method of manufacturing a shape steel, since the hot-rolled high-temperature H-section steel 10 is cooled and the influence of temperature on the bending and warping is almost eliminated, the bending and warping are corrected. It is possible to prevent the shape change accompanying the temperature change from occurring after the correction.
In the cooling bed 6, the shape steel is preferably cooled to 200 ° C or lower. This is because it is preferable to correct the hot-rolled section steel after it has been sufficiently cooled and the temperature has almost no influence on bending and warping. When bending correction or warping correction is applied to a shape steel having a temperature exceeding 200 ° C., the correction ends with the temperature distribution remaining, so that the shape steel is cooled down to room temperature and disappears. The cross-sectional shape defect may occur.

また、図6に示したレイアウトにおいては、冷却床6と曲がり矯正機2との間に曲がり測定装置を設けることが好ましい。冷却が終了した後のH形鋼10に対しての曲がり状態を測定することができ、そして、上述したとおりの長手方向領域、曲がり方向、及び曲がり量に応じた曲がり矯正を行うことができるからである。
図7は、本発明の他の実施形態に係る形鋼の製造設備を示す模式図である。図7に示す実施形態では、図6に示したものに対して、冷却床6、曲がり矯正機2、反り矯正機3のレイアウトを変更している。すなわち、冷却床6の出側が、曲がり矯正機2と反り矯正機3との間の搬送装置9aに接続されている。搬送装置9aの長さはH形鋼10の長さよりも長く、つまり、曲がり矯正機2と反り矯正機3との間の間隔は、矯正されるH形鋼10の長さよりも広い。
Further, in the layout shown in FIG. 6, it is preferable to provide a bending measuring device between the cooling floor 6 and the bending straightener 2. Since the bending state with respect to the H-section steel 10 after cooling is completed can be measured, and the bending correction according to the longitudinal region, the bending direction, and the bending amount as described above can be performed. It is.
FIG. 7 is a schematic view showing a structural steel manufacturing facility according to another embodiment of the present invention. In the embodiment shown in FIG. 7, the layout of the cooling floor 6, the bend straightening machine 2, and the warp straightening machine 3 is changed from that shown in FIG. 6. That is, the exit side of the cooling floor 6 is connected to a transfer device 9 a between the bend straightening machine 2 and the warp straightening machine 3. The length of the conveying device 9 a is longer than the length of the H-section steel 10, that is, the interval between the bend straightening machine 2 and the warp straightening machine 3 is wider than the length of the H-section steel 10 to be straightened.

このように構成することで、曲がりが小さく曲がり矯正が不要な形鋼については、曲がり矯正機2に搬送することなく反り矯正機3に搬送して反りを矯正することができる。したがって、曲がり矯正が不要な形鋼と曲がり矯正が必要な形鋼が混在する場合に、曲がり矯正が必要な形鋼だけを曲がり矯正機2に搬送することが容易となり、曲がり矯正を行わないにもかかわらず曲がり矯正機2を通過させる形鋼をなくすことができるので、形鋼の生産性が向上する。   By configuring in this way, a shape steel that has a small bend and does not require bend correction can be conveyed to the warp straightening machine 3 without being conveyed to the bend straightening machine 2 to correct the warp. Therefore, when a shape steel that does not require bending correction and a shape steel that requires bending correction are mixed, it becomes easy to convey only the shape steel that requires bending correction to the bending straightening machine 2, so that the bending correction is not performed. Nevertheless, the shape steel that passes the bend straightening machine 2 can be eliminated, so that the productivity of the shape steel is improved.

なお、図7に示すレイアウトにおいては、搬送装置9a上に上述の曲がり測定装置を設けることが好ましい。冷却床6で冷却後に曲がり測定装置により曲がり量の測定を行うことができ、また曲がり量の測定結果に基づき、曲がり矯正が必要な場合には曲がり矯正機2側への搬送が、曲がり矯正が不要な場合には反り矯正機3側への搬送が容易となるからである。   In the layout shown in FIG. 7, it is preferable to provide the above-described bending measuring device on the transport device 9a. After cooling on the cooling floor 6, the bending amount can be measured by the bending measuring device, and when the bending amount needs to be corrected based on the bending amount measurement result, the conveyance to the bending correction machine 2 side is performed. This is because when it is unnecessary, conveyance to the warp straightening machine 3 side becomes easy.

また、図7に示すレイアウトにおいては、上述したH形鋼の転回を行う転回装置を、曲がり矯正機2の搬送装置9aとは反対側に設けることが好ましい。このようにすることで、曲がり矯正機2の構成を、外面ロール21及び内面ロール22,22を1組だけ備えるものとすることができる。H形鋼10を冷却床6の出側から曲がり矯正機2へと導入する(図7中の矢印A)際に、一方のフランジ12を圧延し、その後に曲がり矯正機2の搬送装置9aとは反対側にてH形鋼10を転回させ、その後に、該反対側からH形鋼10を曲がり矯正機2に導入して(図7中の矢印B)他方のフランジ12を圧延することができ、いずれの方向への曲がりにも対応することができる。そして、搬送装置9aに戻ったH形鋼10をそのまま反り矯正機3へ送ることが可能となるので、製造設備におけるH形鋼10の流れがスムーズになり、搬送効率が良好となる。   Moreover, in the layout shown in FIG. 7, it is preferable to provide the turning device for turning the H-shaped steel described above on the side opposite to the conveying device 9a of the bending straightening machine 2. By doing in this way, the structure of the bending correction machine 2 can be provided with only one set of the outer surface roll 21 and the inner surface rolls 22 and 22. When the H-section steel 10 is introduced from the exit side of the cooling floor 6 to the bend straightening machine 2 (arrow A in FIG. 7), one flange 12 is rolled, and then the conveying device 9a of the bend straightening machine 2 Rolling the H-section steel 10 on the opposite side, and then introducing the H-section steel 10 from the opposite side into the bending straightener 2 (arrow B in FIG. 7) to roll the other flange 12. Yes, it can handle bending in either direction. And since it becomes possible to send the H-section steel 10 which returned to the conveying apparatus 9a to the curvature correction machine 3 as it is, the flow of the H-section steel 10 in a manufacturing facility becomes smooth, and conveyance efficiency becomes favorable.

また、形鋼矯正装置1及び形鋼の製造設備におけるH形鋼10の姿勢は、特に限定されるものではなく、ウェブ11が水平をなしフランジ12,12が鉛直をなすH姿勢とすることもできるし、ウェブ11が鉛直をなしフランジ12,12が水平をなす姿勢(いわゆるI姿勢)とすることもできる。
曲がり矯正機2におけるH形鋼10の姿勢がI姿勢である場合は、曲がり矯正機2において外面ロール21と内面ロール22のロール軸21a,21bは、図2に示すように水平に設置され、H姿勢である場合は、曲がり矯正機2において外面ロール21と内面ロール22のロール軸21a,21bは、鉛直に設置される。
Moreover, the posture of the H-section steel 10 in the shape-steel straightening device 1 and the shape-steel manufacturing facility is not particularly limited, and the web 11 may be horizontal and the flanges 12 and 12 may be vertical. It is also possible to adopt a posture in which the web 11 is vertical and the flanges 12 and 12 are horizontal (so-called I posture).
When the posture of the H-shaped steel 10 in the bend straightening machine 2 is the I position, the roll shafts 21a and 21b of the outer surface roll 21 and the inner surface roll 22 in the bend straightening machine 2 are horizontally installed as shown in FIG. In the H posture, the roll shafts 21a and 21b of the outer surface roll 21 and the inner surface roll 22 in the bending straightener 2 are installed vertically.

ただし、反り矯正機3においては、ウェブ11が水平をなすH姿勢でH形鋼10の反り矯正を実施することが好ましいので、H姿勢でH形鋼10の曲がり矯正を実施すれば、そのままの姿勢で反り矯正を実施することができる。よって、曲がり矯正を実施した後に、H形鋼10の長手方向に沿う中心軸を回転中心としてH形鋼10を90°転回して姿勢を変更する必要が無いので、搬送時間を短縮することができる。   However, in the warp straightening machine 3, since it is preferable to carry out the straightening of the H-section steel 10 in the H posture in which the web 11 is horizontal, if the straightening of the H-section steel 10 is carried out in the H posture, it remains as it is. Warp correction can be carried out with posture. Therefore, it is not necessary to change the posture by turning the H-shaped steel 10 by 90 ° around the central axis along the longitudinal direction of the H-shaped steel 10 after the bending correction is performed, so that the conveyance time can be shortened. it can.

図2のように曲がり矯正機2におけるH形鋼10の姿勢がI姿勢である場合は、曲がり矯正を実施した後に、H形鋼10の長手方向に沿う中心軸を回転中心としてH形鋼10を90°転回して姿勢を変更してから反り矯正を行う必要があるため、形鋼の転回装置が必要である。
この転回装置におけるH形鋼10の転回方法は、H形鋼10の長手方向に沿う中心軸を回転中心としてH形鋼10を90°転回させることができるならば特に限定されるものではないが、例えば、I姿勢あるいはH姿勢のH形鋼10の両フランジ12,12を、I姿勢の場合は上下からH姿勢の場合は左右から挟み込んで、H形鋼10の長手方向に沿う中心軸を回転軸として90°転回させる方法を採用することができる。
When the attitude of the H-section steel 10 in the bend straightening machine 2 is the I position as shown in FIG. 2, after the bend correction is performed, the H-section steel 10 with the central axis along the longitudinal direction of the H-section steel 10 as the rotation center. Since it is necessary to perform warp correction after turning 90 ° to change the posture, a turning device for the shape steel is necessary.
The turning method of the H-section steel 10 in this turning device is not particularly limited as long as the H-section steel 10 can be rotated 90 ° about the central axis along the longitudinal direction of the H-section steel 10 as a rotation center. For example, both flanges 12 and 12 of the H-section steel 10 in the I-position or H-position are sandwiched from the top and bottom in the case of the I-position from the left and right in the case of the H-position, and the central axis along the longitudinal direction of the H-section steel 10 is A method of rotating 90 ° as the rotation axis can be employed.

なお、本実施形態は本発明の一例を示したものであって、本発明は本実施形態に限定されるものではない。
例えば、本発明を適用できるH形鋼のサイズは特に限定されるものではなく、大型や小型など、あらゆるサイズのH形鋼に対して適用可能である。
また、本実施形態においては、H形鋼を例にして形鋼矯正装置1及び形鋼の矯正方法を説明したが、ウェブとフランジとを有する形鋼であれば、本発明を適用することが可能である。
In addition, this embodiment shows an example of this invention and this invention is not limited to this embodiment.
For example, the size of the H-section steel to which the present invention can be applied is not particularly limited, and can be applied to any size H-section steel such as large and small.
Moreover, in this embodiment, although the shape steel straightening apparatus 1 and the shape steel straightening method were demonstrated taking the H-section steel as an example, if the shape steel has a web and a flange, the present invention can be applied. Is possible.

さらに、本実施形態においては、形鋼矯正装置1を形鋼の製造設備中に設置した例を説明したが、形鋼の製造設備外において形鋼矯正装置1を使用することも可能である。
〔実施例〕
以下に実施例を示して、本発明をさらに具体的に説明する。図1に示す形鋼矯正装置を用いて、熱間圧延で製造されたH形鋼の曲がり及び反りを矯正した。このH形鋼の寸法は、ウェブ高さが600mm、フランジ幅Bが300mm、ウェブ厚t1が16mm、フランジ厚t2が22mmである。熱間圧延終了後の形鋼を長さ8mに切断し、冷却床で100℃以下まで冷却した後に、得られたH形鋼の曲がり及び反りを測定したところ、曲がり形状パターンは皿形であり、長さ8m全体で、曲がりは18mm、反りは15mmであった。曲がりと反りが寸法公差±8mm(長さ1mあたり1mm)を超えているため、曲がりと反りの両方について矯正を実施した。
Furthermore, in this embodiment, although the example which installed the shaped-steel straightening apparatus 1 in the manufacturing equipment of a shaped steel was demonstrated, it is also possible to use the shaped-steel straightening apparatus 1 out of the manufacturing equipment of a shaped steel.
〔Example〕
The present invention will be described more specifically with reference to the following examples. Using the shape steel straightening device shown in FIG. 1, the bending and warping of the H-section steel manufactured by hot rolling were corrected. As for the dimensions of this H-shaped steel, the web height is 600 mm, the flange width B is 300 mm, the web thickness t1 is 16 mm, and the flange thickness t2 is 22 mm. The shape steel after hot rolling is cut into 8m length, cooled to 100 ° C or less on the cooling bed, and then the bending and warpage of the obtained H-section steel are measured. The bending shape pattern is a dish shape. The entire length was 8 m, the bending was 18 mm, and the warpage was 15 mm. Since the bending and warping exceeded the dimensional tolerance ± 8 mm (1 mm per 1 m length), correction was performed for both bending and warping.

まず、図2に示す曲がり矯正機2を用いて、曲がりの曲率半径方向内側のフランジを圧延し、H形鋼の曲がりを矯正した。矯正前の曲がり18mmを矯正する適切な圧延荷重を、予め調査しておいたデータから選定して、120tonに設定した。この結果、曲がり量を3mmまで低下させることができた。ただし、反り量が20mmに増加していた。
次に、曲がり矯正機2の下流側に設置された図3の反り矯正機を用いて、反り矯正を実施した。反り矯正の条件は、通常の操業で使用するロール間隔の設定値とした。千鳥状に配置した合計9個のローラによってH形鋼に繰り返し曲げを付与した結果、反り量を寸法公差内である2mmに低減することができた。反り矯正後の曲がり量は、反り矯正前とほぼ同じ4mmであり、曲がりと反りの両方を寸法公差内に矯正することができた。
First, using the bend straightening machine 2 shown in FIG. 2, the flange on the inner side in the curvature radius direction of the bend was rolled to correct the bend of the H-section steel. An appropriate rolling load that corrects the 18 mm bend before correction was selected from the data previously investigated and set to 120 ton. As a result, the amount of bending could be reduced to 3 mm. However, the warpage amount increased to 20 mm.
Next, the warp correction was performed using the warp correction machine of FIG. 3 installed on the downstream side of the bending correction machine 2. The conditions for correcting warpage were set values of roll intervals used in normal operation. As a result of repeatedly bending the H-section steel with a total of nine rollers arranged in a staggered manner, the amount of warpage could be reduced to 2 mm which is within the dimensional tolerance. The amount of bending after warping correction was 4 mm, which was almost the same as before warping correction, and both bending and warping could be corrected within dimensional tolerances.

比較例として、上記実施例と同じ寸法のH形鋼を、図3の反り矯正機で反り矯正した後に、図2の曲がり矯正機で曲がり矯正するテストを実施した。矯正前の曲がり量は16mm、反り量は18mmであった。最初に、通常の操業で使用するロール間隔の設定値で反り矯正を行った結果、反り量が3mmに低減した。曲がり量は15mmになり、反り矯正前とほぼ同じ量であった。続いて、曲がり矯正を110tonの圧延荷重で実施した結果、曲がり量を4mmまで低減することができた。一方、曲がり矯正後の反り量は10mmに増加しており、寸法公差の上限を超える値まで悪化した。   As a comparative example, a test was performed in which an H-shaped steel having the same dimensions as in the above-described example was subjected to warp correction using the warp straightening machine shown in FIG. The amount of bending before correction was 16 mm, and the amount of warpage was 18 mm. Initially, the amount of warpage was reduced to 3 mm as a result of performing warpage correction with the set value of the roll interval used in normal operation. The amount of bending was 15 mm, which was almost the same as before the warp correction. Subsequently, as a result of performing bending correction with a rolling load of 110 tons, the bending amount could be reduced to 4 mm. On the other hand, the amount of warpage after bending correction has increased to 10 mm, and has deteriorated to a value exceeding the upper limit of the dimensional tolerance.

上記実施例及び比較例と同様の試験を、H形鋼10本ずつそれぞれ実施した。その結果、実施例の場合は、10本全てのH形鋼の曲がり量と反り量が寸法公差内になったのに対し、比較例の場合は、10本中5本のH形鋼の反り量が寸法公差の上限を超える結果となった。
以上のように、本発明の形鋼の矯正装置と形鋼の矯正方法によれば、曲がりと反りの両方を精度よく矯正することが可能であり、寸法精度の良好な形鋼を効率良く製造することが可能であった。
Tests similar to those in the above-described examples and comparative examples were performed for 10 H-section steels. As a result, in the case of the example, the bending amount and the warping amount of all 10 H-section steels are within the dimensional tolerance, whereas in the comparative example, the warping of 5 out of 10 H-section steels. The amount exceeded the upper limit of dimensional tolerance.
As described above, according to the shape steel straightening device and shape steel straightening method of the present invention, it is possible to accurately correct both bending and warping, and efficiently produce a shape steel with good dimensional accuracy. It was possible to do.

さらに、矯正後のH形鋼のフランジ部における長手方向の残留応力を、上記実施例と比較例について1本ずつ測定した。比較例の場合は、最大で100MPa程度の圧縮の残留応力が測定されたのに対して、実施例の場合は、最大40MPa程度の圧縮の残留応力に半減しており、残留応力を小さくできることが分かった。   Furthermore, the residual stress in the longitudinal direction at the flange portion of the H-shaped steel after correction was measured one by one for the examples and comparative examples. In the case of the comparative example, a compressive residual stress of about 100 MPa at the maximum was measured, whereas in the case of the example, the compressive residual stress was reduced by half to a maximum of about 40 MPa, and the residual stress can be reduced. I understood.

1 形鋼矯正装置
2 曲がり矯正機
3 反り矯正機
5 搬送装置
6 冷却床
9 搬送ライン
10 H形鋼
11 ウェブ
12 フランジ
21 外面ロール
22 内面ロール
31 ローラ
DESCRIPTION OF SYMBOLS 1 Shape steel straightening device 2 Bending straightening machine 3 Warpage straightening machine 5 Conveyance device 6 Cooling floor 9 Conveyance line 10 H-section steel 11 Web 12 Flange 21 Outer surface roll 22 Inner surface roll 31 Roller

Claims (6)

ウェブ及びフランジを有する形鋼の曲がり及び反りを矯正する矯正装置であって、
前記フランジを圧延して前記形鋼の曲がりを矯正する曲がり矯正機と、前記形鋼の搬送方向に沿って千鳥状に配列した矯正ローラに前記ウェブを通過させて該形鋼に曲げを繰り返すことで前記形鋼の反りを矯正する反り矯正機と、を備え、
前記形鋼の搬送方向の上流側に前記曲がり矯正機が、下流側に前記反り矯正機が配置され、前記曲がり矯正機と前記反り矯正機との間隔が矯正される形鋼の長さよりも広いことを特徴とする形鋼の矯正装置。
A correction device for correcting bending and warping of a section steel having a web and a flange,
Bending the shape steel by passing the web through a bending straightening machine that rolls the flange and corrects the bending of the shape steel, and straightening rollers arranged in a staggered manner along the conveying direction of the shape steel. And a warp straightening machine for correcting the warpage of the shape steel,
The bend straightening machine is arranged on the upstream side in the conveying direction of the shape steel, the warp straightening machine is arranged on the downstream side, and the distance between the bend straightening machine and the warp straightening machine is wider than the length of the shaped steel to be corrected. A straightening device for shaped steel, characterized in that.
ウェブ及びフランジを有する形鋼の製造設備であって、
鋼素材を前記ウェブ及び前記フランジを有する所定の断面形状の形鋼に成形する熱間圧延機と、前記形鋼を冷却する冷却床と、前記形鋼のフランジを圧延して前記形鋼の曲がりを矯正する曲がり矯正機と、前記形鋼の搬送方向に沿って千鳥状に配列した矯正ローラに前記ウェブを通過させて該形鋼に曲げを繰り返して前記形鋼の反りを矯正する反り矯正機と、を備え、
前記製造設備における前記鋼素材あるいは前記形鋼の搬送方向の上流側から下流側に向けて、前記熱間圧延機、前記冷却床、前記曲がり矯正機、前記反り矯正機の順で配置され、前記曲がり矯正機と前記反り矯正機との間隔が矯正される形鋼の長さよりも広いことを特徴とする形鋼の製造設備。
A manufacturing facility for a section steel having a web and a flange,
A hot rolling machine for forming a steel material into a shape steel having a predetermined cross-sectional shape having the web and the flange, a cooling bed for cooling the shape steel, and bending the shape steel by rolling the flange of the shape steel. And a warp straightening machine for correcting the warp of the shape steel by passing the web through straight rollers arranged in a staggered manner along the conveying direction of the shape steel and repeatedly bending the shape steel. And comprising
From the upstream side to the downstream side in the conveying direction of the steel material or the shape steel in the manufacturing facility, the hot rolling mill, the cooling bed, the bend straightening machine, the warp straightening machine are arranged in this order, An apparatus for producing a section steel, characterized in that the distance between the bending straightener and the warp straightener is wider than the length of the section steel to be straightened.
ウェブ及びフランジを有する形鋼の製造設備であって、
鋼素材を前記ウェブ及び前記フランジを有する所定の断面形状の形鋼に成形する熱間圧延機と、前記形鋼を冷却する冷却床と、前記形鋼のフランジを圧延して前記形鋼の曲がりを矯正する曲がり矯正機と、前記形鋼の搬送方向に沿って千鳥状に配列した矯正ローラに前記ウェブを通過させて該形鋼に曲げを繰り返して前記形鋼の反りを矯正する反り矯正機と、を備え、
前記製造設備における前記鋼素材あるいは前記形鋼の搬送方向の上流側から下流側に向けて、前記熱間圧延機、前記冷却床の順で配置され、前記冷却床の出側が、前記曲がり矯正機と前記反り矯正機との間の搬送装置に接続されてなることを特徴とする形鋼の製造設備。
A manufacturing facility for a section steel having a web and a flange,
A hot rolling machine for forming a steel material into a shape steel having a predetermined cross-sectional shape having the web and the flange, a cooling bed for cooling the shape steel, and bending the shape steel by rolling the flange of the shape steel. And a warp straightening machine for correcting the warp of the shape steel by passing the web through straight rollers arranged in a staggered manner along the conveying direction of the shape steel and repeatedly bending the shape steel. And comprising
From the upstream side to the downstream side in the conveying direction of the steel material or the shape steel in the manufacturing facility, the hot rolling mill and the cooling bed are arranged in this order, and the exit side of the cooling bed is the bend straightening machine. And a warp straightening machine connected to a conveying device between the machine and the warp straightening machine.
前記冷却床と前記曲がり矯正機との間に、前記形鋼の曲がりを測定する曲がり測定装置を備えることを特徴とする請求項2又は請求項3に記載の形鋼の製造設備。   The equipment for manufacturing a section steel according to claim 2 or 3, further comprising a bend measuring device for measuring the bend of the section steel between the cooling floor and the bend straightening machine. ウェブ及びフランジを有する形鋼の曲がり及び反りを矯正する矯正方法であって、
前記フランジを圧延して前記形鋼の曲がりを矯正した後に、前記形鋼の搬送方向に沿って千鳥状に配列した矯正ローラに前記ウェブを通過させて該形鋼に曲げを繰り返して前記形鋼の反りを矯正することを特徴とする形鋼の矯正方法。
A correction method for correcting bending and warping of a section steel having a web and a flange,
After rolling the flange and correcting the bending of the shape steel, the shape steel is repeatedly bent by passing the web through correction rollers arranged in a staggered manner along the conveyance direction of the shape steel. A method for straightening shaped steel, characterized by straightening the warpage of the steel.
ウェブ及びフランジを有する形鋼の製造方法であって、
熱間圧延により鋼素材を前記ウェブ及び前記フランジを有する所定の断面形状の形鋼に成形し、該所定の断面形状に成形された形鋼を200℃以下まで冷却した後に、前記フランジに圧延を施すことにより前記形鋼の曲がりを矯正し、次いで、前記形鋼の搬送方向に沿って千鳥状に配列した矯正ローラに前記ウェブを通過させて該形鋼に曲げを繰り返して前記形鋼の反りを矯正することを特徴とする形鋼の製造方法。
A method for producing a shape steel having a web and a flange, comprising:
The steel material is formed into a shape steel having a predetermined cross-sectional shape having the web and the flange by hot rolling, the shape steel formed in the predetermined cross-sectional shape is cooled to 200 ° C. or less, and then the flange is rolled. The bending of the shape steel is corrected by applying, and then the web is passed through correction rollers arranged in a staggered manner along the conveying direction of the shape steel, and the bending of the shape steel is repeated by repeatedly bending the shape steel. A method for producing a shape steel, characterized by correcting the above.
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