JP5200638B2 - T-shaped steel cooling device - Google Patents

T-shaped steel cooling device Download PDF

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JP5200638B2
JP5200638B2 JP2008101657A JP2008101657A JP5200638B2 JP 5200638 B2 JP5200638 B2 JP 5200638B2 JP 2008101657 A JP2008101657 A JP 2008101657A JP 2008101657 A JP2008101657 A JP 2008101657A JP 5200638 B2 JP5200638 B2 JP 5200638B2
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shaped steel
cooling
flange
web
cooling device
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JP2009248170A (en
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彫生 岩井
裕 鹿野
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Nippon Steel Corp
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Nippon Steel and Sumitomo Metal Corp
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Description

本発明は、熱間圧延されたＴ形鋼を有効に冷却する冷却装置に関するものである。 The present invention relates to cooling apparatus you effectively cool the hot rolled T-shaped steel.

Ｔ形鋼を製造する方法として、以下の２種類の方法が開示されている。
第１は、建築用鋼材として用いられてきた、例えばフランジ幅Ｂ×フランジ厚さＴ2が、１５０mm×９mm〜３００mm×３２mmというような小寸法のＴ形鋼を、２重式圧延機の圧延ロールに設けられる多数の孔型を用いる孔型圧延法によって、ブルームから直接に圧延して製造する方法である。 The following two methods have been disclosed as methods for producing T-shaped steel.
First, for example, a T-shaped steel having a small size such as flange width B × flange thickness T2 of 150 mm × 9 mm to 300 mm × 32 mm, which has been used as a construction steel material, is a rolling roll of a double rolling mill. Is produced by rolling directly from a bloom by a perforated rolling method using a large number of perforations provided in.

第２は、生産性の向上を図るために、ユニバーサルミルによってＨ形鋼またはＩ形鋼を仕上げ圧延すると同時に、そのＨ形鋼またはＩ形鋼のウエブを長手方向に切断することによって２条のＴ形鋼を得る方法である。   Secondly, in order to improve the productivity, the H-shaped steel or I-shaped steel is finish-rolled by a universal mill, and at the same time, the H-shaped steel or I-shaped steel web is cut in the longitudinal direction so that two strips are formed. This is a method for obtaining a T-shaped steel.

しかしながら、この第２の方法では、Ｔ形鋼のウエブ厚みがフランジ厚みに比べて非常に薄いので、ウエブ切断後の冷却の際に、ウエブが座屈して曲がりが発生したり、ウエブの面外変形からウエブ波と称する永久変形が発生していた。   However, in this second method, the web thickness of the T-shaped steel is very thin compared to the flange thickness, so that during cooling after the web cutting, the web buckles and bends, or the web is out of plane. A permanent deformation called a web wave occurred from the deformation.

これを防ぐ方法として、Ｈ形鋼、特にウエブ厚みの薄いＨ形鋼の製造時には、従来から、フランジの外面を水冷する方法が採られている（例えば特許文献１〜４）。
特開平１０−２０２３０１号公報 特開平１０−２１６８２５号公報 特開平１０−２１６８２６号公報 特開平１０−２３５４０７号公報 As a method for preventing this, at the time of manufacturing H-section steel, particularly H-section steel having a thin web thickness, a method of water-cooling the outer surface of the flange has been conventionally employed (for example, Patent Documents 1 to 4).
JP-A-10-202301 Japanese Patent Laid-Open No. 10-216825 JP-A-10-216826 Japanese Patent Laid-Open No. 10-235407

これら特許文献１〜４に記載された発明は、前記第２の方法で２条のＴ形鋼を得た後、各々のＴ形鋼のフランジ外面またはフランジ内外面を冷却することを特徴とするものである。   The inventions described in these Patent Documents 1 to 4 are characterized in that after obtaining two T-shaped steels by the second method, the flange outer surface or flange inner / outer surface of each T-shaped steel is cooled. Is.

このうち、特許文献１〜３の方法では、仕上げ圧延ならびにウエブ切断工程では、ウエブを水平方向、フランジを鉛直方向に維持するのに対し、フランジ冷却工程では、フランジをウエブよりも下に位置させた状態で冷却を行うので、冷却工程に搬送する前にＴ形鋼を転回しておく必要がある。   Among them, in the methods of Patent Documents 1 to 3, the finish is rolled and the web cutting process maintains the web in the horizontal direction and the flange in the vertical direction, whereas in the flange cooling process, the flange is positioned below the web. Therefore, it is necessary to turn the T-shaped steel before it is transferred to the cooling process.

また、特許文献４の方法では、冷却工程に搬送する前に２条のＴ形鋼のウエブ同士を上下に重ね合わせておく必要があるので、そのための転回装置や重ね合わせ装置を設置する必要がある。加えて、冷却装置についてもＴ形鋼専用のものが新たに必要になるなど、Ｔ形鋼製造のための設備費用が膨大になる。   Moreover, in the method of Patent Document 4, since it is necessary to superimpose two T-shaped steel webs before and after being conveyed to the cooling step, it is necessary to install a turning device and a superposing device for that purpose. is there. In addition, the equipment cost for manufacturing the T-shaped steel is enormous, for example, a cooling device dedicated to the T-shaped steel is newly required.

さらに特許文献１〜４の方法には以下のような問題点がある。
フランジに垂直な方向の曲がり（特許文献１〜３では上下反り、特許文献４では左右曲がり）に対してはフランジ外面冷却水量の調整により対応が可能である。 Furthermore, the methods of Patent Documents 1 to 4 have the following problems.
It is possible to cope with the bending in the direction perpendicular to the flange (up and down in Patent Documents 1 to 3 and left and right in Patent Document 4) by adjusting the cooling water amount of the flange outer surface.

しかしながら、フランジ幅方向の曲がり（特許文献１〜３では左右曲がり、特許文献４では上下反り）には対応することができない。また、Ｔ形鋼の寸法、特にフランジ幅が変化した際に、水冷条件を適切にするための調整（スプレーノズルの方向や位置の変更等）ができない。   However, it is not possible to cope with bending in the flange width direction (bending left and right in Patent Documents 1 to 3 and vertical warping in Patent Document 4). Further, when the dimensions of the T-shaped steel, particularly the flange width, are changed, adjustments (such as changing the direction and position of the spray nozzle) for making the water cooling conditions appropriate are not possible.

さらに特許文献４の方法では、冷却中にＴ形鋼を側面から支えるガイドが無いので、Ｔ形鋼の左右曲がりの状況によっては、Ｔ形鋼が自重で転倒したり、搬送ラインから飛び出したりする危険性がある。   Further, in the method of Patent Document 4, since there is no guide for supporting the T-shaped steel from the side during cooling, the T-shaped steel falls down by its own weight or jumps out of the conveying line depending on the situation of the left and right bending of the T-shaped steel. There is a risk.

ところで、出願人は、Ｈ形鋼や平行フランジ溝形鋼などの形鋼を、中間圧延あるいは仕上げ圧延などの熱間圧延後に冷却する際に、ウエブ内幅の小さい形鋼であってもそのフランジおよびフィレットの内面を効果的に冷却でき、また冷却水の噴射により落下したスケールがノズルなどに堆積するのを防止できる形鋼の冷却装置及び冷却方法を、特許文献５で提案した。
特開２００３−１９５１０号公報 By the way, the applicant, when cooling a shape steel such as H-shape steel or parallel flange groove shape steel after hot rolling such as intermediate rolling or finish rolling, even if the shape steel has a small web inner width, Patent Document 5 proposes a cooling apparatus and cooling method for a shape steel that can effectively cool the inner surface of the fillet and can prevent scales dropped by jetting of cooling water from accumulating on a nozzle or the like.
JP 2003-19510 A

さらには、極厚Ｈ形鋼や、フランジ厚さに比べてウエブ厚さが相対的に厚いＨ形鋼において、ウエブ高さが大きくなっても均一冷却を可能とする冷却方法及び装置を、特許文献６で提案した。
特開２００５−２３８２５２号公報 Furthermore, patents have been made on cooling methods and devices that enable uniform cooling even when the web height is increased in extremely thick H-section steel and H-section steel that is relatively thick compared to the flange thickness. Proposed in Reference 6.
JP 2005-238252 A

これら特許文献５，６で提案した冷却方法および冷却装置によれば、搬送されてくる形鋼（Ｈ形鋼、溝形鋼）のウエブ高さやフランジ幅が変更された場合にも、被冷却材の均一冷却を実現することが可能である。   According to the cooling method and the cooling device proposed in these Patent Documents 5 and 6, even when the web height and the flange width of the shape steel (H-shaped steel, groove-shaped steel) conveyed are changed, the material to be cooled It is possible to achieve uniform cooling.

本発明が解決しようとする問題点は、特にＨ形鋼のウエブを切断して２条のＴ形鋼とした後に行う従来のフランジ冷却では、左右曲がりや上下反りを防止することが難しいという点である。   The problem to be solved by the present invention is that it is difficult to prevent left-right bending and vertical warping, particularly with conventional flange cooling performed after cutting the H-shaped steel web into a two-strand T-shaped steel. It is.

発明者らは、出願人が特許文献５，６で提案した形鋼の水冷装置を、そのまま若しくは少しの改造を加えれば、Ｈ形鋼や溝形鋼と同様に、熱間圧延Ｔ形鋼の均一冷却（曲がり、反り、捩れ等を生じさせない冷却）が可能なことを見出し、以下の本発明を完成させた。   The inventors of the hot-rolled T-section steel as well as the H-section steel and the groove-shaped steel can be obtained by adding the water-cooling apparatus for the section steel proposed by the applicants in Patent Documents 5 and 6 as they are or with slight modifications. It was found that uniform cooling (cooling without causing bending, warping, twisting, etc.) was possible, and the following present invention was completed.

本発明のＴ形鋼のフランジ外面を冷却する装置は、
フランジ側の一方端部が上方を向くように傾斜させたＴ形鋼をガイドすべく、Ｔ形鋼の搬送経路途中に、パスラインを挟んで左右に、互いに接離移動可能に設けられた一対のサイドガイドと、
これらサイドガイドに、前記Ｔ形鋼のフランジ外面を冷却すべく、パスラインに沿って設けられた複数の冷却ノズルと、
これら複数の冷却ノズルを用いて冷却中の前記Ｔ形鋼のウエブ下面を支承するガイドと、
を備えたことを最も主要な特徴としている。 The apparatus for cooling the flange outer surface of the T- shaped steel of the present invention is as follows.
In order to guide the T-shaped steel inclined so that one end on the flange side faces upward, a pair provided in the middle of the T-shaped steel conveyance path so as to be movable toward and away from each other across the pass line. With side guides,
To these side guides, a plurality of cooling nozzles provided along a pass line in order to cool the flange outer surface of the T-shaped steel,
A guide that supports the lower surface of the web of the T-shaped steel being cooled using the plurality of cooling nozzles;
That with you it is the most important feature.

また、Ｔ形鋼のフランジ内外面を冷却する場合は、
前記本発明のＴ形鋼の冷却装置において、
前記サイドガイドに、前記Ｔ形鋼のフランジ上側内面を冷却すべく、パスラインに沿って設けられた複数の冷却ノズルと、
前記Ｔ形鋼のフランジ下側内面を冷却すべく、前記搬送経路のＴ形鋼のウエブより下方位置に、パスラインに沿って設けられた複数の冷却ノズルと、
をさらに設けた冷却装置を使用すれば良い。 When cooling the inner and outer surfaces of the T- shaped flange,
In the T-shaped steel cooling device of the present invention,
A plurality of cooling nozzles provided along a pass line in order to cool the flange-side inner surface of the T-shaped steel in the side guide;
A plurality of cooling nozzles provided along a pass line at a position below the T-shaped steel web of the conveying path in order to cool the flange lower inner surface of the T-shaped steel;
May be used.

この本発明のＴ形鋼の冷却装置において、Ｔ形鋼のフランジの内外面を冷却する前記冷却ノズルの噴射角度を調整する噴射角度調整機構をさらに備えさせた場合には、冷却するＴ形鋼のサイズが変った場合でも、効果的な冷却が行える。   In this T-shaped steel cooling device of the present invention, when the injection angle adjusting mechanism for adjusting the injection angle of the cooling nozzle for cooling the inner and outer surfaces of the flange of the T-shaped steel is further provided, the cooled T-shaped steel Even if the size of the battery changes, effective cooling can be performed.

本発明のＴ形鋼の冷却装置においては、前記冷却中のＴ形鋼のウエブ下面を支承するガイドを備えるので、前記サイドガイドに起因して発生する疵を防止することが出来る。 In the cooling device of the T shaped steel of the present invention, the supporting the web lower surface of the T shaped steel during cooling guide Bei example Runode, the side guide can be prevented flaws caused.

本発明において、「上方」とは、Ｔ形鋼の搬送経路における搬送面に対して鉛直線上の上方を言う。また、「下方」とは、同じくＴ形鋼の搬送経路における搬送面に対して鉛直線上の下方を言う。「左右」とは、Ｔ形鋼の搬送経路を搬送されるＴ形鋼の搬送方向と直交する断面における左右を言う。   In the present invention, “upward” means above the vertical line with respect to the conveying surface in the T-shaped steel conveying path. In addition, “downward” refers to the downward direction on the vertical line with respect to the conveying surface in the T-shaped steel conveying path. “Left and right” refers to the left and right in a cross section orthogonal to the conveyance direction of the T-shaped steel conveyed along the T-shaped steel conveyance path.

本発明によれば、以下に列挙する効果が得られる。
(1) Ｔ形鋼の寸法が変化しても、同一設備を用いて、左右曲がりや上下反りを発生させること無くＴ形鋼を冷却できる。 According to the present invention, the effects listed below can be obtained.
(1) Even if the dimensions of the T-shaped steel change, it is possible to cool the T-shaped steel using the same equipment without causing left / right bending or vertical warping.

(2) 新たな設備投資をせず、既存のＨ形鋼の水冷設備を改造するだけで、Ｔ形鋼を適切に冷却できる。
(3) 従来のＴ形鋼の冷却に必要であった、Ｔ形鋼の転回装置や２条Ｔ形鋼のウエブどうしの重ね合せ装置等の設備投資が不要である。 (2) T-shaped steel can be cooled appropriately by simply remodeling existing H-shaped steel water cooling equipment without investing in new equipment.
(3) There is no need for capital investment such as a T-shaped steel turning device and a double T-shaped steel web overlapping device required for cooling conventional T-shaped steel.

以下、本発明を実施するための最良の形態について、図１〜図４を用いて詳細に説明する。
図１及び図２は本発明のＴ形鋼の冷却装置を用いた本発明の冷却方法の一例を説明する図である。 Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIGS.
1 and 2 are diagrams for explaining an example of the cooling method of the present invention using the T-shaped steel cooling device of the present invention.

Ｔ形鋼はＨ形鋼の片側のフランジが無いため、水平面（搬送テーブル面）に対してウエブが傾いた状態で冷却することになる。従って、Ｔ形鋼の冷却に、出願人が特許文献５，６で提案したＨ形鋼の冷却方法をそのまま当てはめると、Ｔ形鋼の断面内で上下対称な均一冷却が出来ない。   Since the T-shaped steel does not have a flange on one side of the H-shaped steel, the T-shaped steel is cooled in a state where the web is inclined with respect to a horizontal plane (conveying table surface). Therefore, if the cooling method of the H-section steel proposed by the applicant in Patent Documents 5 and 6 is applied as it is to the cooling of the T-section steel, uniform cooling that is vertically symmetrical within the cross section of the T-section steel cannot be performed.

すなわちウエブが傾いているため、必然的にフランジが鉛直面に対して傾斜し（図１で言えば時計回り方向に傾斜し）、Ｈ形鋼の上フランジ内面冷却用ノズルから噴射した冷却水が上フランジ内面に対して適切に当たらないことになる。   In other words, since the web is inclined, the flange is inevitably inclined with respect to the vertical surface (in the clockwise direction in FIG. 1), and the cooling water sprayed from the nozzle for cooling the inner surface of the upper flange of the H-shaped steel is It will not hit the inner surface of the upper flange properly.

そこで、本発明では、図１のように、Ｔ形鋼１の搬送経路の途中に、パスラインを挟んで左右に、一対のサイドガイド２ａ，２ｂを設けている。このサイドガイド２ａ，２ｂは、搬送テーブルＴ上に傾斜した状態で載置されたＴ形鋼１の幅（高さＡ）に数十mm程度加えた間隔になるように、左右各々のサイドガイド２ａ，２ｂの位置設定を行う。従って、サイドガイド２ａ，２ｂには、互いに接離移動できるように、移動機構３ａ，３ｂが設けられている。   Therefore, in the present invention, as shown in FIG. 1, a pair of side guides 2 a and 2 b are provided on the left and right sides of the pass line in the middle of the conveying path of the T-section steel 1. The side guides 2a and 2b are arranged on the left and right side guides so as to have an interval of about several tens of millimeters added to the width (height A) of the T-section steel 1 placed in an inclined state on the transfer table T. The positions of 2a and 2b are set. Accordingly, the side guides 2a and 2b are provided with moving mechanisms 3a and 3b so that they can move toward and away from each other.

そして、本発明では、Ｔ形鋼１のフランジ１ｆ外面を冷却するための複数の冷却ノズル４ａと、Ｔ形鋼１のフランジ１ｆ上側内面を冷却するための複数の冷却ノズル４ｂを、パスラインに沿って前記サイドガイド２ａ，２ｂに設けている。また、搬送経路のＴ形鋼１のウエブ１ｗより下方位置には、Ｔ形鋼１のフランジ１ｆ下側内面を冷却するための複数の冷却ノズル４ｃを、パスラインに沿って設けている。   In the present invention, a plurality of cooling nozzles 4a for cooling the outer surface of the flange 1f of the T-section steel 1 and a plurality of cooling nozzles 4b for cooling the inner surface of the flange 1f of the T-section steel 1 are used as a pass line. Along the side guides 2a and 2b. A plurality of cooling nozzles 4c for cooling the lower inner surface of the flange 1f of the T-section steel 1 are provided along the pass line at a position below the web 1w of the T-section steel 1 in the conveyance path.

このような一対のサイドガイド２ａ，２ｂによって、フランジ１ｆ側の一方端部が上方を向くように傾斜したＴ形鋼１をガイドした状態で、例えば冷却ノズル４ａ〜４ｃから冷却水を噴射して、Ｔ形鋼１のフランジ１ｆの外面と、上側内面及び下側内面の冷却を行う。これにより、Ｈ形鋼に比べて遜色のない均一冷却が可能となる。   With such a pair of side guides 2a and 2b, with the T-section steel 1 inclined such that one end on the flange 1f side faces upward, cooling water is injected from the cooling nozzles 4a to 4c, for example. The outer surface of the flange 1f of the T-section steel 1 and the upper and lower inner surfaces are cooled. Thereby, uniform cooling which is inferior to that of H-section steel is possible.

上述した冷却ノズル４ａ〜４ｃには、各々適切な範囲の冷却が可能なように、図１のように、冷却ノズル４ａ〜４ｃの噴射角度を調整する噴射角度調整機構５ａ〜５ｃを設けておくことが望ましい。この際、図１の例では各冷却ノズル４ａ〜４ｃは鉛直方向に１段ずつ配置したものを示しているが、多段ノズルの場合には各々のノズルについて適正な角度に設定を行う。   The above-described cooling nozzles 4a to 4c are provided with injection angle adjusting mechanisms 5a to 5c for adjusting the injection angles of the cooling nozzles 4a to 4c, respectively, so that cooling in an appropriate range is possible. It is desirable. At this time, in the example of FIG. 1, the cooling nozzles 4 a to 4 c are arranged one stage at a time in the vertical direction. However, in the case of a multistage nozzle, each nozzle is set to an appropriate angle.

図３は、前記本発明の冷却装置を用いてＴ形鋼１の冷却を行う場合に、冷却中のウエブ１ｗの変形を防止する目的で設置したウエブ１ｗの下面を支承するガイドの構造を簡単に説明する図である。   FIG. 3 shows a simplified structure of a guide for supporting the lower surface of the web 1w installed for the purpose of preventing deformation of the web 1w during cooling when the T-section steel 1 is cooled using the cooling device of the present invention. FIG.

図３の例は、ウエブ１ｗの下面を支承するガイド６として、円筒形のガイドローラを設け、Ｔ形鋼１のウエブ１ｗの下面ならびにフランジ１ｆの下側内面と接触させることによりサイドガイド２ａ，２ｂとの接触により発生する疵を防止するものを示している。   In the example shown in FIG. 3, a cylindrical guide roller is provided as a guide 6 for supporting the lower surface of the web 1w, and the side guides 2a, 2a, 2b are brought into contact with the lower surface of the web 1w of the T-section steel 1 and the lower inner surface of the flange 1f. The thing which prevents the wrinkle which generate | occur | produces by the contact with 2b is shown.

これらのガイド６は、例えば小型モータ、油圧若しくは空圧シリンダー等を用いて昇降や傾斜が可能なように構成し、Ｔ形鋼１の寸法に応じてガイド６の位置（図３におけるガイドローラのテーブルからの高さや傾斜角度）を調整可能な構造にすることが望ましい。   These guides 6 are configured so that they can be moved up and down and tilted using, for example, a small motor, hydraulic or pneumatic cylinder, and the position of the guide 6 (the guide roller of FIG. It is desirable to have a structure in which the height and inclination angle from the table can be adjusted.

以上の本発明の冷却装置として、特許文献５，６で提案したＨ形鋼の冷却装置を改造して、Ｈ形鋼の冷却と兼用する場合は、Ｈ形鋼１を冷却する場合の突っ掛け防止のために、前記ガイド６を、搬送テーブルＴの下面に収納させるリトラクタブル構造としても良い。また、Ｔ形鋼１の冷却時にのみ搬送テーブルＴ上に仮置きし、Ｈ形鋼１の冷却時には撤去する構造としても良い。   When the H-shaped steel cooling device proposed in Patent Documents 5 and 6 is remodeled as the cooling device of the present invention and used also for cooling the H-shaped steel, the stake in cooling the H-shaped steel 1 For prevention, a retractable structure in which the guide 6 is housed on the lower surface of the transfer table T may be used. Moreover, it is good also as a structure temporarily set | placed on the conveyance table T at the time of cooling of the T-section steel 1, and removing at the time of the cooling of the H-section steel 1. FIG.

なお、図３では、フランジ外面冷却ノズル４ａ、フランジ下側内面冷却ノズル４ｃ、紙面左側のサイドガイド２ａの表示を省略している。   In FIG. 3, the flange outer surface cooling nozzle 4a, the flange lower inner surface cooling nozzle 4c, and the left side guide 2a are not shown.

以上の説明では、Ｔ形鋼１のフランジ１ｆの内外面を冷却する場合について説明したが、Ｔ形鋼１の寸法・形状に応じてフランジ１ｆの内面冷却を省略してもよい。すなわち、フランジ１ｆの厚み／ウエブ１ｗの厚みが比較的小さく、またフランジ１ｆの幅／ウエブ１ｗの高さが比較的小さいＴ形鋼１については、仕上げ圧延終了後のフランジ１ｆとウエブ１ｗの温度差に起因するＴ形鋼の放冷課程でのウエブ１ｗ高さ方向（フランジに垂直な方向）の上下反りが発生し難いので、フランジ１ｆ内面の水冷を省略し、フランジ１ｆ外面のみを冷却してもよい。   In the above description, the case where the inner and outer surfaces of the flange 1f of the T-section steel 1 are cooled has been described, but the inner surface cooling of the flange 1f may be omitted depending on the size and shape of the T-section steel 1. That is, for the T-section steel 1 having a relatively small flange 1f thickness / web 1w thickness and a relatively small flange 1f width / web 1w height, the temperature of the flange 1f and the web 1w after finishing rolling is finished. Due to the difference, the web 1w height direction (direction perpendicular to the flange) in the T-section steel cooling process is unlikely to occur, so water cooling on the inner surface of the flange 1f is omitted and only the outer surface of the flange 1f is cooled. May be.

この場合、フランジ１ｆの外面冷却ではなくフランジ１ｆの内面冷却を省略するほうが望ましいのは、フランジ１ｆの内面を冷却する際に、ウエブ１ｗ上面あるいは下面に冷却水が多少流れるため、フランジ１ｆとウエブ１ｗの温度差を縮める点でそのほうが有利に働くからである。   In this case, it is desirable to omit the cooling of the inner surface of the flange 1f rather than the cooling of the outer surface of the flange 1f. When the inner surface of the flange 1f is cooled, some cooling water flows on the upper or lower surface of the web 1w. This is because it works more advantageously in reducing the temperature difference of 1w.

次に、本発明を実施例によりさらに具体的に説明する。
図４に示す熱間圧延設備列の仕上げユニバーサルミルの下流側に本発明の冷却装置Ｒを設けた。 Next, the present invention will be described more specifically with reference to examples.
The cooling device R of the present invention was provided on the downstream side of the finishing universal mill in the hot rolling equipment row shown in FIG.

なお、冷却装置Ｒは、フランジ外面冷却ノズル４ａが設けられたヘッダーを上下方向に３段備える以外は、図１および図２に示す構造とした。また冷却ゾーン長は１０ｍとした。   The cooling device R has the structure shown in FIGS. 1 and 2 except that the header provided with the flange outer surface cooling nozzle 4a is provided in three stages in the vertical direction. The cooling zone length was 10 m.

この図４に示す熱間圧延設備列により、幅１０００mm、厚さ２５０mmの連続鋳造スラブを加熱炉で１２５０〜１３００℃に加熱し、ブレークダウンミルＢＤにより１０数パスの往復圧延を行って粗形鋼片とした。続いて粗ユニバーサルミルＵＲ、エッジャーミルＥにより７パスの往復圧延を行って中間材とし、その後、仕上げユニバーサルミルＵＦにより１パスの整形圧延を行い、ウエブ高さ５００mm、フランジ幅１５０mm、フランジ厚み２５mm、ウエブ厚み１５mmのＴ形鋼を製造した。   With the hot rolling equipment row shown in FIG. 4, a continuous cast slab having a width of 1000 mm and a thickness of 250 mm is heated to 1250 to 1300 ° C. in a heating furnace, and subjected to reciprocating rolling for 10 or more passes by a breakdown mill BD to be rough. It was a steel piece. Subsequently, a round universal mill UR and an edger mill E are used to perform 7-pass reciprocating rolling to form an intermediate material, and then a finishing universal mill UF is used for 1-pass shaping and rolling to obtain a web height of 500 mm, a flange width of 150 mm, and a flange thickness of 25 mm. A T-shaped steel with a web thickness of 15 mm was produced.

なお、図４における仕上げユニバーサルミルＵＦの水平ロールには、ロール幅が変更可能なロールが組込まれているが、幅固定の水平ロールを用いても良い。ロール幅変更可能なロールを使用することが望ましいのは、圧延する製品のフランジ厚みに応じてロール幅を変更して圧延することで、主に造船向けに用いられる、フランジ厚みにかかわらずウエブ高さが一定のＴ形鋼を製造し易くなるからである。   In addition, although the roll which can change roll width is incorporated in the horizontal roll of the finishing universal mill UF in FIG. 4, you may use the horizontal roll of fixed width. It is desirable to use rolls that can change the roll width. The roll height is changed according to the flange thickness of the product to be rolled and rolled, so that the web height is mainly used for shipbuilding, regardless of the flange thickness. This is because it becomes easy to manufacture a T-shaped steel with a certain length.

仕上げユニバーサルミルＵＦでの整形圧延終了後、図１の冷却装置Ｒによりフランジ外面およびフランジ内面側に位置する２個所のフィレット（上下フィレット）を、以下の条件で冷却し（１パス通材）、その後常温になるまで空冷を行った。   After completion of shaping and rolling in the finishing universal mill UF, the two fillets (upper and lower fillets) positioned on the flange outer surface and the flange inner surface side are cooled by the cooling device R in FIG. 1 under the following conditions (one pass material), Thereafter, air cooling was performed until the temperature reached room temperature.

（冷却条件）
フランジ外面冷却の冷却範囲（フランジ幅方向）：１５０mm
フランジ１個所当たりの外面冷却の冷却水量：３００リットル／m2／分
フィレット冷却の冷却範囲（フランジ幅方向の冷却幅）：１００mm
フィレット１個所当たりの冷却水量：１３０リットル／m2／分
冷却時の材料搬送速度：３m／秒 (Cooling conditions)
Cooling range of flange outer surface cooling (flange width direction): 150mm
Cooling water volume for outer surface cooling per flange: 300 liters / m 2 / min Fillet cooling cooling range (cooling width in the flange width direction): 100 mm
Cooling water volume per fillet: 130 liters / m 2 / min Material transport speed during cooling: 3 m / s

また、冷却に伴うＴ形鋼の断面内変形（ウエブの弓なり、フランジ倒れ）を防止するため、図３に示すウエブ下面を支承するガイドを設置し、Ｔ形鋼のウエブならびにフランジを下側から支承した状態で冷却した。   In addition, in order to prevent deformation in the cross section of the T-shaped steel due to cooling (web bow, flange collapse), a guide for supporting the lower surface of the web shown in FIG. 3 is installed, and the T-shaped steel web and flange are installed from below. Cooled in the supported state.

比較のため、仕上げユニバーサルミルによる整形圧延後、本発明の冷却装置を用いた本発明の冷却を行わずにそのまま通過させ、その後空冷する方法（比較例）により、同一寸法のＴ形鋼を製造した。   For comparison, a T-shaped steel of the same size is manufactured by a method (comparative example) in which, after shaping rolling by a finishing universal mill, the sheet is passed as it is without performing the cooling of the present invention using the cooling device of the present invention and then air-cooled. did.

その結果、本発明の冷却装置を用いた本発明方法で冷却したＴ形鋼は常温まで冷却された状態で左右曲がり、上下反りが見られなかったのに対し、比較例の方法により製造されたＴ形鋼は、常温まで冷却された状態で特に左右曲がりが大きい製品となり、その後の矯正に、より多くの工数を必要とした。   As a result, the T-shaped steel cooled by the method of the present invention using the cooling device of the present invention was bent by right and left in the state cooled to room temperature, and was not seen in the vertical warp, but was manufactured by the method of the comparative example. The T-shaped steel has a particularly large left / right bend when cooled to room temperature, and requires more man-hours for subsequent correction.

本発明は上記の例に限らず、各請求項に記載された技術的思想の範疇であれば、適宜実施の形態を変更しても良いことは言うまでもない。   The present invention is not limited to the above example, and it goes without saying that the embodiments may be changed as appropriate within the scope of the technical idea described in each claim.

例えば上記の実施例では本発明の冷却装置Ｒを仕上げユニバーサルミルＵＦの下流側に設置したが、本発明の冷却装置Ｒを中間圧延工程、すなわち図４の粗ユニバーサルミルＵＲの上流側および／またはエッジャーミルＥの下流側に設置し、本発明の冷却方法を適用することも可能である。   For example, in the above embodiment, the cooling device R of the present invention is installed on the downstream side of the finishing universal mill UF. However, the cooling device R of the present invention is installed in the intermediate rolling step, that is, on the upstream side of the rough universal mill UR in FIG. It is also possible to install the cooling method of the present invention by installing it on the downstream side of the edger mill E.

また、Ｔ形鋼の製造プロセスとして、図４に示すようなＴ形鋼の状態で熱間圧延するプロセス以外に、熱間圧延したＨ形鋼のウエブを切断して２条のＴ形鋼を製造するプロセスにおいて、得られたＴ形鋼に本発明の水冷方法を適用することも可能である。   In addition to the process of hot rolling in the state of the T-shaped steel as shown in FIG. 4 as a manufacturing process of the T-shaped steel, the hot-rolled H-shaped steel web is cut to form two T-shaped steels. In the manufacturing process, it is also possible to apply the water cooling method of the present invention to the obtained T-shaped steel.

さらに、図１および図２に示した冷却ノズルの噴射角度調整機構に代えて、特許文献６で提案した、スクリュージャッキを用いた下フランジ内面冷却ノズルの噴射角度調整機構を採用しても良い。   Furthermore, instead of the cooling nozzle injection angle adjusting mechanism shown in FIGS. 1 and 2, the injection angle adjusting mechanism of the lower flange inner surface cooling nozzle using the screw jack proposed in Patent Document 6 may be adopted.

本発明のＴ形鋼の冷却装置を用いた本発明の冷却方法の一例を説明する正面図である。It is a front view explaining an example of the cooling method of this invention using the cooling device of the T-shaped steel of this invention. 本発明のＴ形鋼の冷却装置を用いた本発明の冷却方法の一例を説明する平面図である。It is a top view explaining an example of the cooling method of this invention using the cooling device of the T-shaped steel of this invention. 本発明のＴ形鋼の冷却装置に設置するウエブ下面支承ガイドを説明する正面図で、（ａ）はフランジ幅の大きいサイズに適用した例、（ｂ）はフランジ幅の小さいサイズに適用した例である。BRIEF DESCRIPTION OF THE DRAWINGS It is a front view explaining the web lower surface support guide installed in the T-shaped steel cooling device of this invention, (a) is an example applied to the size with a large flange width, (b) is an example applied to a size with a small flange width. It is. 本発明のＴ形鋼の冷却装置を備えた形鋼の熱間圧延設備列の一例を示す配置図である。It is an arrangement drawing showing an example of a hot rolling equipment line of section steel provided with a cooling device of T section steel of the present invention.

符号の説明Explanation of symbols

Ｒ 冷却装置
１ Ｔ形鋼
１ｆ フランジ
１ｗ ウエブ
２ａ，２ｂ サイドガイド
３ａ，３ｂ 移動機構
４ａ〜４ｃ 冷却ノズル
５ａ〜５ｃ 噴射角度調整機構
６ ガイド
R Cooling device 1 T-shaped steel 1f Flange 1w Web 2a, 2b Side guide 3a, 3b Moving mechanism 4a-4c Cooling nozzle 5a-5c Injection angle adjusting mechanism 6 Guide

Claims (3)

フランジ側の一方端部が上方を向くように傾斜させたＴ形鋼をガイドすべく、Ｔ形鋼の搬送経路途中に、パスラインを挟んで左右に、互いに接離移動可能に設けられた一対のサイドガイドと、
これらサイドガイドに、前記Ｔ形鋼のフランジ外面を冷却すべく、パスラインに沿って設けられた複数の冷却ノズルと、
これら複数の冷却ノズルを用いて冷却中の前記Ｔ形鋼のウエブ下面を支承するガイドと、
を備えたことを特徴とするＴ形鋼の冷却装置。 In order to guide one end portion of the flange side of the T shaped steel is inclined to face upward, the middle transport path T-shaped steel, on the left and right sides of the pass line, provided to be separable move relative to each other A pair of side guides;
To these side guides, a plurality of cooling nozzles provided along a pass line in order to cool the flange outer surface of the T-shaped steel,
A guide that supports the lower surface of the web of the T-shaped steel being cooled using the plurality of cooling nozzles;
Cooling device T shaped steel is characterized by having a. 請求項１に記載のＴ形鋼の冷却装置において、
前記サイドガイドに、前記Ｔ形鋼のフランジ上側内面を冷却すべく、パスラインに沿って設けられた複数の冷却ノズルと、
前記Ｔ形鋼のフランジ下側内面を冷却すべく、前記搬送経路のＴ形鋼のウエブより下方位置に、パスラインに沿って設けられた複数の冷却ノズルと、
をさらに設けたことを特徴とするＴ形鋼の冷却装置。 In the T-shaped steel cooling device according to claim 1,
A plurality of cooling nozzles provided along a pass line in order to cool the flange-side inner surface of the T-shaped steel in the side guide;
A plurality of cooling nozzles provided along a pass line at a position below the T-shaped steel web of the conveying path in order to cool the flange lower inner surface of the T-shaped steel;
Cooling device T-shaped steel, wherein further provided with things. 請求項１又は２に記載のＴ形鋼の冷却装置において、
前記Ｔ形鋼のフランジの内外面を冷却する冷却ノズルの噴射角度を調整する噴射角度調整機構をさらに備えたことを特徴とするＴ形鋼の冷却装置。 In the T-shaped steel cooling device according to claim 1 or 2,
Cooling device T-shaped steel, characterized by further comprising an injection angle adjusting mechanism for adjusting the injection angle of the cooling nozzle for cooling the inner and outer surfaces of the flanges of the T-shaped steel.
JP2008101657A 2008-04-09 2008-04-09 T-shaped steel cooling device Expired - Fee Related JP5200638B2 (en)

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