JP2004076379A - H-shape steel and its manufacturing method - Google Patents

H-shape steel and its manufacturing method Download PDF

Info

Publication number
JP2004076379A
JP2004076379A JP2002237739A JP2002237739A JP2004076379A JP 2004076379 A JP2004076379 A JP 2004076379A JP 2002237739 A JP2002237739 A JP 2002237739A JP 2002237739 A JP2002237739 A JP 2002237739A JP 2004076379 A JP2004076379 A JP 2004076379A
Authority
JP
Japan
Prior art keywords
flange
section steel
steel
recesses
shaped
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP2002237739A
Other languages
Japanese (ja)
Inventor
Yoshinori Miura
三浦 啓徳
Michiya Koujiyou
駒城 倫哉
Mikio Kono
河野 幹夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Priority to JP2002237739A priority Critical patent/JP2004076379A/en
Publication of JP2004076379A publication Critical patent/JP2004076379A/en
Withdrawn legal-status Critical Current

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide H-shape steel of a new shape easily machined in a hot rolling process and enhanced in sticking performance to concrete. <P>SOLUTION: This H-shape steel is formed with a large number of recesses 110 repeated in the longitudinal direction of steel at a corner on the inner surface 103 side of the tip of each of four flanges 101, and adjacent projecting parts 111 on the flange inner surface 103 side adjacent to the recesses 110. The H-shape steel is further provided with L-shaped projections formed in a right-angled direction to an axis at a fillet from a web to the flange and arranged intermittently in the axial direction together with the large number of recesses. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、H形鋼及びその製造方法に関し、さらに詳しくは、コンクリートとの付着性を向上させるために、H形鋼の内側に軸方向に間欠的に形成した凹部又は突起を形成したH形鋼に関する。
【0002】
【従来の技術】
フランジの内面に突起を有するH形鋼は、フランジの外面に突起を有するH形鋼より外わくの無い場合ではコンクリートとの付着性が優れている。このため、熱間圧延後にリブや突起を、フランジの内面に溶接により取付け、内面に突起を有するH形鋼を製造していた。しかし、このようなH形鋼は生産性が非常に悪かった。
【0003】
長手方向に直交する断続的な突起を、熱間圧延でフランジ内面に成形することは、従来、仕上ユニバーサルロールの回転方向と圧下方向から考えて、非常に難しいとされてきた。特に、フランジの幅に対して十分に長い突起をフランジ内面に形成することが難しい。しかし、熱間圧延によってフランジの内面に突起を付与する技術もいくつか提案されている。
【0004】
例えば、H形鋼の各フランジ内面を圧下する溝付の小径ロールを各フランジ内面毎に4個配設し、フランジ外面を圧下する垂直ロールの各チョックを延長して各第2垂直ロールを支持し、各水平ロールと各第2垂直ロールベベルギヤとを噛合せ、駆動部周速と第2垂直ロールの圧下側面部周速との周速調整手段を設けた仕上圧延装置が開示されている。(例えば、特許文献1参照。)。この仕上圧延装置によれば、コンクリートとの付着性に優れた、フランジの内面に突起を有するH形鋼を、熱間圧延で製造することができる。しかし、大きな設備投資が必要で、仕上圧延設備にかかるコストが非常に高かった。
【0005】
また、第1粗ユニバーサル圧延機の水平ロールの側面の傾斜を45度程度と大きくするとともに、この側面のほぼ中央部に凹部を形成し、フランジ内面に線状突起を造形し、次いで線状突起を断続的に圧下し、所定の高さ及びピッチの縞突起をフランジ内面に有するH形鋼を得る技術がある(例えば、特許文献2参照。)。この技術では、粗ユニバーサル圧延機が2機必要になり、設備コストが非常に高かった。また、縞突起は圧延方向に延びる形状で、コンクリートとの付着性の点では不十分であった。
【0006】
【特許文献1】
特開平3−32408号公報
【0007】
【特許文献2】
特開昭61−82903号公報
【0008】
【発明が解決しようとする課題】
本発明は上記実情に鑑み、H形鋼のフランジ先端部の内面側隅角部に長手方向に繰返す多数の断続溝を形成することによって、上記のH形鋼とコンクリートとの付着性能を高めたH形鋼を開発し熱間圧延工程で加工が容易なH形鋼を提供することを目的とするものである。
【0009】
【課題を解決するための手段】
本発明は、上記問題点を解決するためになされたもので、その技術手段は、フランジの先端部内面側に鋼材の長手方向に繰り返す多数の凹部を備えたことを特徴とするH形鋼である。また、前記フランジ先端部の内面側隅角部の凹部に隣接するフランジ内面側に、凸部を備えたH形鋼が好適である。このフランジ内面凹部に隣接する凸部はH形鋼のフランジ内でコンクリートが反ウエブ側へ抜け出しにくくなるという効果があるためである。この隣接凸部は前記フランジ先端部の内面側隅角部の凹部を圧延工程で形成すると、同時に容易に形成することができるものである。
【0010】
このH形鋼においては、前記多数の凹部又は凹部と隣接凸部をフランジ先端に設けるが、これをフランジの4隅にすべて備えると、H形鋼のコンクリートとの付着性が最も高くなるので好適である。また、前記多数のフランジ先端部の凹部又は凹部と隣接凸部を備えると共に、フィレット部にウエブ側面からフランジ内面に亘って軸直角方向に形成され、軸方向に間欠的に配置されたL字形の突起を備えると、さらに好ましい。また、このL字型の突起もフィレット部4隅すべてに備えると好ましい。
【0011】
また、本発明は、以上のようなH形鋼が備えているフランジ先端部の内面側隅角部に設けた多数の凹部又は凹部とこれに隣接する凸部を、さらに、これと共に及びフィレット部のL字形の突起を、H形鋼の熱間圧延工程で圧延により形成することを特徴とするH形鋼の製造方法を提供する。
【0012】
本発明者は、フランジ内面側に突起を有するH形鋼の形成について、種々実験を行った。その結果、圧延工程において、フランジ先端部の内面側隅角部を押え込むことによって、この部分にH形鋼の軸に直角な凹部を軸方向に断続的に形成することができ、この凹部に隣接するフランジ内面部分が同時に膨出して、フランジ内面に隣接凸部を形成することが容易にできることを知見した。本発明のH形鋼はこの知見によって完成されたものである。本発明方法では、通常のH形鋼に、又はフィレット部に突起を有するH形鋼に対して、仕上ユニバーサル圧延機の水平ロールとして、フランジ先端部の内面側隅角部のみを押圧する断続突起付ロールを適用することによって、比較的容易に断続凹部とこの凹部に隣接するフランジ内面側の隣接凸部とを成形することができる。
【0013】
【発明の実施の形態】
以下図面を参照して本発明の実施の形態を説明する。
【0014】
図1は本発明の実施例を示すH形鋼100の部分斜視図である。フランジ101の先端部の内面103側の隅角部にH形鋼100の長手方向に繰り返す多数の凹部110を備えている。また、このフランジ101の先端部の内面側隅角部の凹部110に隣接するフランジ内面103側に、隣接する凸部111を備えている。
【0015】
図2はフィレット部104に突起120を設けたH形鋼を示す斜視図である。突起120は、軸直角方向に形成され、軸方向に間欠的に配置されたL字形の突起であって、フランジ101の内面103側に延びると共にウエブ102の側面側にも延びるL字形をなしている。図3は図2の突起を有するH形鋼に図1の実施例を適用した本発明の実施例を示すものである。図1〜3は、凹部110や突起120等をすべてそれぞれ4箇所に設けたものを示しているが、本発明はこれに限定されるものではなく、必要に応じて、凹部110や突起120の設定位置を変更することができる。
【0016】
図4は、図3の実施例の部分断面正面図で、フランジ101の先端部の内面側隅角部に設けた凹部110と、この凹部110に隣接するフランジ内面側に形成された凸部111を示すものである。凹部110はフランジ101の先端部の内面側隅角部に斜めの傾斜を有する形状に形成されているが、凹部110の形状、大きさ、底面130の傾斜角度等は限定されない。この凹部110の形状によって、この凹部110と共に形成される隣接凸部111の形状、大きさを変更することができる。
【0017】
図5は、凹部110の底面130がフィレット部の突起120の上面と隣接するように形成したH形鋼100を示すもので、凹部110のフランジ101高さ方向寸法131と、フィレット部の突起120のフランジ101高さ方向の寸法132との合計がフランジ101のウエブ側面からの全高さ133と一致しているものを示している。この場合、図4に示す突起111は、凹部110と突起120のH形鋼長手方向の位置が一致する部分では形成されないこととなる。
【0018】
凹部110のフランジ101高さ方向寸法131が小さい方が凹部110の成形が容易である。一方、この寸法131が大きい方がフランジ内面部分の凹凸部分の占有率が向上する。これらを勘案して、フランジ先端部の内面側隅角部の凹部110とフィレット部の突起120の形状、大きさ、配列等をうまく組合わせることによって、用途に応じた最適形状の本発明のH形鋼を形成することができる。例えば、フランジ内面突起のフランジ脚長に対する合計長さの割合を調整することができる。
【0019】
図6は、本発明に係るH形鋼を製造する仕上ユニバーサル圧延機の実施例のロールの正面図である。図6の左半分はH形鋼100のフィレット部に突起を形成するロール11を装着した水平ロール10を示している。また、図6の右半分は、H形鋼100のフランジ先端部の内面側隅角部に凹部を形成する突起22を有するロール21を装着した水平ロール20を示している。これらのロールを備えた仕上ユニバーサル圧延機によって、本発明のH形鋼を圧延によって製造することができる。
【0020】
【発明の効果】
本発明によれば、コンクリートとの付着性能を高めた新規な形状のH形鋼が提供される。このH形鋼は、本発明により熱間圧延工程で容易に加工することができ、寄与するところが大である。
【図面の簡単な説明】
【図1】実施例の部分斜視図である。
【図2】実施例を説明する部分斜視図である。
【図3】実施例の部分斜視図である。
【図4】実施例の一部断面正面図である。
【図5】実施例の部分正面図である。
【図6】実施に用いる仕上ユニバーサル圧延機の部分正面図である。
【符号の説明】
10  水平ロール
11  ロール
20  水平ロール
21  ロール
22  突起
100  H形鋼
101  フランジ
102  ウエブ
103  内面
104  フィレット部
110  凹部
111  凸部
120  突起
130  底面
131  寸法
132  寸法
133  全高さ
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an H-shaped steel and a method of manufacturing the same, and more particularly, to an H-shaped steel having an axially intermittently formed recess or projection formed inside an H-shaped steel in order to improve adhesion to concrete. About steel.
[0002]
[Prior art]
The H-section steel having a projection on the inner surface of the flange has better adhesion to concrete than the H-section steel having a projection on the outer surface of the flange when there is no outer frame. For this reason, after hot rolling, ribs and projections were attached to the inner surface of the flange by welding, and an H-section steel having a projection on the inner surface was manufactured. However, such an H-section steel had a very low productivity.
[0003]
Conventionally, it has been considered extremely difficult to form intermittent projections perpendicular to the longitudinal direction on the inner surface of the flange by hot rolling in view of the rotation direction and the rolling direction of the finishing universal roll. In particular, it is difficult to form a protrusion sufficiently long on the inner surface of the flange with respect to the width of the flange. However, some techniques for providing projections on the inner surface of the flange by hot rolling have been proposed.
[0004]
For example, four small-diameter rolls with grooves for reducing the inner surface of each flange of the H-section steel are provided for each inner surface of each flange, and each chock of the vertical roll for reducing the outer surface of the flange is extended to support each second vertical roll. There is disclosed a finish rolling apparatus in which each horizontal roll and each second vertical roll bevel gear are meshed with each other, and a peripheral speed adjusting means for controlling a peripheral speed of a driving unit and a peripheral speed of a pressing side surface of the second vertical roll is provided. (For example, refer to Patent Document 1). According to this finish rolling apparatus, an H-section steel having excellent adhesion to concrete and having a projection on the inner surface of the flange can be manufactured by hot rolling. However, a large capital investment was required, and the cost of the finish rolling equipment was very high.
[0005]
In addition, the inclination of the side surface of the horizontal roll of the first coarse universal rolling mill is increased to about 45 degrees, a concave portion is formed substantially at the center of the side surface, a linear projection is formed on the inner surface of the flange, and then the linear projection is formed. Is intermittently reduced to obtain an H-shaped steel having stripe projections of a predetermined height and pitch on the inner surface of a flange (for example, see Patent Document 2). In this technique, two rough universal rolling mills were required, and the equipment cost was extremely high. Further, the stripe projections extend in the rolling direction, and were insufficient in terms of adhesion to concrete.
[0006]
[Patent Document 1]
JP-A-3-32408
[Patent Document 2]
JP-A-61-82903
[Problems to be solved by the invention]
In view of the above circumstances, the present invention has improved the adhesion performance between the H-section steel and concrete by forming a large number of intermittent grooves which are repeated in the longitudinal direction at the inner corner of the end of the flange of the H-section steel. It is an object of the present invention to develop an H-section steel and provide an H-section steel that can be easily processed in a hot rolling process.
[0009]
[Means for Solving the Problems]
The present invention has been made in order to solve the above-mentioned problems, and the technical means is an H-shaped steel having a large number of concave portions repeated in the longitudinal direction of the steel material on the inner surface side of the front end portion of the flange. is there. Further, an H-section steel provided with a convex portion on the inner surface side of the flange adjacent to the concave portion at the inner corner portion of the front end portion of the flange is preferable. This is because the convex portion adjacent to the concave portion on the inner surface of the flange has an effect that it is difficult for the concrete to escape to the non-web side in the flange of the H-shaped steel. The adjacent convex portion can be easily formed at the same time when the concave portion at the inner corner portion of the front end portion of the flange is formed in the rolling step.
[0010]
In this H-section steel, the large number of recesses or recesses and adjacent projections are provided at the tip of the flange, but it is preferable to provide all of these at all four corners of the flange because the adhesion of the H-section steel to concrete becomes highest. It is. In addition, a plurality of concave portions or concave portions and adjacent convex portions at the end portions of the flanges are provided, and the L-shaped portions are formed in the fillet portion in a direction perpendicular to the axis from the web side surface to the inner surface of the flange, and are intermittently arranged in the axial direction. It is more preferable to have a projection. In addition, it is preferable that the L-shaped protrusion is provided at all four corners of the fillet portion.
[0011]
In addition, the present invention further comprises a plurality of recesses or recesses provided at the inner corners of the front end of the flange provided in the H-section steel and the protrusions adjacent thereto, together with the fillet portion. Wherein the L-shaped projection is formed by rolling in a hot rolling step of the H-section steel.
[0012]
The inventor conducted various experiments on the formation of an H-section steel having a projection on the inner surface side of the flange. As a result, in the rolling process, by pressing down the inner corner portion of the flange tip portion, a recess perpendicular to the axis of the H-section steel can be formed intermittently in this portion in the axial direction. It has been found that adjacent flange inner surface portions bulge at the same time, so that it is possible to easily form adjacent convex portions on the flange inner surface. The H-section steel of the present invention has been completed based on this finding. In the method of the present invention, an intermittent projection which presses only an inner corner portion of a flange tip as a horizontal roll of a finishing universal rolling mill for a normal H-section steel or an H-section steel having a projection in a fillet portion. By applying the attaching roll, the intermittent concave portion and the adjacent convex portion on the inner surface of the flange adjacent to the concave portion can be formed relatively easily.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 is a partial perspective view of an H-section steel 100 showing an embodiment of the present invention. A plurality of recesses 110 that repeat in the longitudinal direction of the H-section steel 100 are provided at the corners on the inner surface 103 side of the front end of the flange 101. Further, the flange 101 is provided with an adjacent convex portion 111 on the inner surface 103 side of the flange adjacent to the concave portion 110 at the inner corner portion of the front end portion.
[0015]
FIG. 2 is a perspective view showing an H-shaped steel in which the protrusion 120 is provided on the fillet portion 104. The protrusion 120 is an L-shaped protrusion formed in a direction perpendicular to the axis and intermittently arranged in the axial direction. The L-shaped protrusion extends toward the inner surface 103 of the flange 101 and also extends to the side surface of the web 102. I have. FIG. 3 shows an embodiment of the present invention in which the embodiment of FIG. 1 is applied to the H-section steel having the projections of FIG. 1 to 3 show the case where the concave portion 110 and the projection 120 are all provided at four positions, respectively, but the present invention is not limited to this, and the concave portion 110 and the projection 120 The setting position can be changed.
[0016]
FIG. 4 is a partial cross-sectional front view of the embodiment of FIG. 3, in which a concave portion 110 is provided at an inner corner of the front end of the flange 101 and a convex portion 111 formed on the inner surface of the flange adjacent to the concave portion 110. It is shown. The concave portion 110 is formed in a shape having an oblique inclination at the inner corner at the front end of the flange 101, but the shape and size of the concave portion 110, the inclination angle of the bottom surface 130, and the like are not limited. The shape and size of the adjacent convex portion 111 formed together with the concave portion 110 can be changed depending on the shape of the concave portion 110.
[0017]
FIG. 5 shows the H-shaped steel 100 formed such that the bottom surface 130 of the concave portion 110 is adjacent to the upper surface of the protrusion 120 of the fillet portion. And the total height 132 of the flange 101 from the web side surface of the flange 101 coincides with the total height 133 of the flange 101 in the height direction. In this case, the protrusion 111 shown in FIG. 4 is not formed at a portion where the positions of the concave portion 110 and the protrusion 120 in the longitudinal direction of the H-beam coincide with each other.
[0018]
The smaller the dimension 131 in the height direction of the flange 101 of the recess 110 is, the easier the formation of the recess 110 is. On the other hand, when the dimension 131 is larger, the occupancy of the uneven portion on the inner surface of the flange is improved. Taking these factors into consideration, the shape, size, arrangement, and the like of the recesses 110 at the inner corners of the flange tip and the protrusions 120 at the fillet portion are properly combined, so that the H of the present invention has an optimal shape according to the application. Shaped steel can be formed. For example, the ratio of the total length of the flange inner surface projection to the flange leg length can be adjusted.
[0019]
FIG. 6 is a front view of the roll of the embodiment of the finishing universal rolling mill for producing the H-section steel according to the present invention. The left half of FIG. 6 shows a horizontal roll 10 equipped with a roll 11 that forms a projection on a fillet portion of the H-section steel 100. The right half of FIG. 6 shows a horizontal roll 20 to which a roll 21 having a projection 22 forming a recess at the inner corner of the front end of the flange of the H-section steel 100 is mounted. With the finishing universal rolling mill provided with these rolls, the H-section steel of the present invention can be manufactured by rolling.
[0020]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the H-shaped steel of a novel shape which improved the adhesion performance with concrete is provided. This H-section steel can be easily processed in the hot rolling step according to the present invention, and greatly contributes.
[Brief description of the drawings]
FIG. 1 is a partial perspective view of an embodiment.
FIG. 2 is a partial perspective view illustrating an embodiment.
FIG. 3 is a partial perspective view of the embodiment.
FIG. 4 is a partial cross-sectional front view of the embodiment.
FIG. 5 is a partial front view of the embodiment.
FIG. 6 is a partial front view of a finishing universal rolling mill used in the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Horizontal roll 11 Roll 20 Horizontal roll 21 Roll 22 Protrusion 100 H-shaped steel 101 Flange 102 Web 103 Inner surface 104 Fillet part 110 Concave part 111 Convex part 120 Protrusion 130 Bottom 131 Dimension 132 Dimension 133 Total height

Claims (7)

フランジの先端部の内面側隅角部に鋼材の長手方向に繰り返す多数の凹部を備えたことを特徴とするH形鋼。An H-shaped steel comprising a plurality of concave portions repeated in a longitudinal direction of a steel material at an inner corner portion of a front end portion of a flange. 前記フランジ先端部の内面側隅角部の凹部に隣接するフランジ内面側に、凸部を備えたことを特徴とする請求項1記載のH形鋼。The H-section steel according to claim 1, wherein a convex portion is provided on an inner surface side of the flange adjacent to a concave portion at an inner corner portion of the front end portion of the flange. 前記多数の凹部を4つの各フランジ先端に備えたことを特徴とする請求項1又は2記載のH形鋼。The H-shaped steel according to claim 1 or 2, wherein the plurality of recesses are provided at four flange tips. 前記多数の凹部とともに、フィレット部にウエブからフランジにわたって軸直角方向に形成され、軸方向に間欠的に配置されたL字形の突起を備えたことを特徴とする請求項1又は2記載のH形鋼。The H-shape according to claim 1 or 2, further comprising an L-shaped projection formed in the fillet portion in a direction perpendicular to the axis from the web to the flange and intermittently arranged in the axial direction, together with the plurality of concave portions. steel. 前記L字型の突起をフィレット部4隅に備えたことを特徴とする請求項4記載のH形鋼。The H-shaped steel according to claim 4, wherein the L-shaped projection is provided at four corners of the fillet portion. 請求項1〜3の何れかに記載のH形鋼が備えているフランジ先端部の内面側隅角部の多数の凹部をH形鋼の熱間圧延工程で圧延により形成することを特徴とするH形鋼の製造方法。A large number of recesses in the inner corners of the flange tip of the H-section steel according to any one of claims 1 to 3 are formed by rolling in a hot rolling step of the H-section steel. Method for producing H-section steel. 請求項4又は5に記載のH形鋼が備えているフランジ先端部の内面側隅角部の多数の凹部とフィレット部のL字形の突起をH形鋼の熱間圧延工程で圧延により形成することを特徴とするH形鋼の製造方法。A large number of recesses at the inner corners of the front end of the flange and the L-shaped protrusion of the fillet provided in the H-section steel according to claim 4 or 5 are formed by rolling in a hot rolling step of the H-section steel. A method for producing an H-beam.
JP2002237739A 2002-08-19 2002-08-19 H-shape steel and its manufacturing method Withdrawn JP2004076379A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002237739A JP2004076379A (en) 2002-08-19 2002-08-19 H-shape steel and its manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002237739A JP2004076379A (en) 2002-08-19 2002-08-19 H-shape steel and its manufacturing method

Publications (1)

Publication Number Publication Date
JP2004076379A true JP2004076379A (en) 2004-03-11

Family

ID=32021351

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002237739A Withdrawn JP2004076379A (en) 2002-08-19 2002-08-19 H-shape steel and its manufacturing method

Country Status (1)

Country Link
JP (1) JP2004076379A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004098099A (en) * 2002-09-06 2004-04-02 Jfe Steel Kk Shaped steel having projection in a vicinity of fillet portion, and method and device for manufacturing the same
JP2019194428A (en) * 2018-05-01 2019-11-07 Jfeスチール株式会社 H-shaped steel beam
US11028573B1 (en) 2020-01-16 2021-06-08 Novel Structures, LLC Serrated beam
WO2021146758A1 (en) * 2020-01-16 2021-07-22 Novel Structures, LLC Serrated beam
US11725386B2 (en) 2020-01-16 2023-08-15 Simpson Strong-Tie Company Inc. Serrated beam

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004098099A (en) * 2002-09-06 2004-04-02 Jfe Steel Kk Shaped steel having projection in a vicinity of fillet portion, and method and device for manufacturing the same
JP2019194428A (en) * 2018-05-01 2019-11-07 Jfeスチール株式会社 H-shaped steel beam
US11028573B1 (en) 2020-01-16 2021-06-08 Novel Structures, LLC Serrated beam
WO2021146758A1 (en) * 2020-01-16 2021-07-22 Novel Structures, LLC Serrated beam
US11725386B2 (en) 2020-01-16 2023-08-15 Simpson Strong-Tie Company Inc. Serrated beam

Similar Documents

Publication Publication Date Title
JP2004076379A (en) H-shape steel and its manufacturing method
JP2004358541A (en) Method for manufacturing shaped bloom and caliber roll
JP2003010902A (en) Method for rough rolling h-section steel
JP2681536B2 (en) Channel rolling mill row
JP4277640B2 (en) Method for producing shaped steel with protrusion and rolling equipment for shaped steel
JP4424374B2 (en) Manufacturing method of section steel with flange inner surface projection and finishing universal rolling mill used therefor
JP3812513B2 (en) Manufacturing method of shaped steel with flange inner protrusion and finishing universal rolling mill used therefor
JPH07284801A (en) Method for rolling wide flange shape
JP2534223B2 (en) Rolling method of rough billet for H-section steel
JP3988586B2 (en) Manufacturing method of section steel with flange inner surface projection and finishing universal rolling mill used therefor
JP2004322105A (en) Method for manufacturing wide flange shape and grooved roll
JPH1147803A (en) Production of wide flange shape with small angular projection and beveling
JP2000102806A (en) Rolling mill
JP3582253B2 (en) Rolling method and rolling roll of crude billet for section steel
JP3339457B2 (en) High-precision rolling method for H-section steel
JP3582222B2 (en) Rolling method of crude slab for shaped steel
JP2943326B2 (en) Method for manufacturing H-section steel
JP2720750B2 (en) H-section rolling mill train
JPH11314102A (en) Asymmetrical shape steel and production thereof
JP2005095966A (en) Producing method for section steel having projection,and rolling equipment for section steel
JP2530405B2 (en) Method for hot rolling channel steel and rolling apparatus train
JPS606201A (en) Production of h-beam with projecting line
JP2577660B2 (en) Hot rolling method for channel steel
JP2000051902A (en) H-section with roll mark and manufacture thereof
JPH0747401A (en) Method and equipment train for shape with flange

Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20051101