JP5092682B2 - Hot rolling method and hot rolling equipment for cell guide section steel - Google Patents

Hot rolling method and hot rolling equipment for cell guide section steel Download PDF

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JP5092682B2
JP5092682B2 JP2007273851A JP2007273851A JP5092682B2 JP 5092682 B2 JP5092682 B2 JP 5092682B2 JP 2007273851 A JP2007273851 A JP 2007273851A JP 2007273851 A JP2007273851 A JP 2007273851A JP 5092682 B2 JP5092682 B2 JP 5092682B2
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cell guide
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JP2009101771A (en
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由紀雄 高嶋
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JFE Steel Corp
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Description

本発明は、多数のコンテナを海上輸送するためのコンテナ船で使用するセルガイドに好適な形鋼（以下、セルガイド用形鋼という）の熱間圧延方法および熱間圧延設備に関するものである。   The present invention relates to a hot rolling method and hot rolling equipment for a shape steel suitable for a cell guide used in a container ship for transporting a large number of containers by sea (hereinafter referred to as a shape steel for a cell guide).

コンテナ船は多数のコンテナを海上輸送するための船舶であり、その船体内には複数の隔壁が設けられる。コンテナは船積みされる際に、クレーンによって隔壁に沿って上方から下方へ移動し、積み出される際には隔壁に沿って下方から上方へ移動する。そのため図７に示すように、コンテナの４隅を案内するための部材（以下、セルガイドという）を隔壁に配設する。   A container ship is a ship for transporting a large number of containers by sea, and a plurality of partition walls are provided in the ship body. When the container is loaded, the container moves from the upper side to the lower side along the partition wall by the crane. When the container is loaded, the container moves from the lower side to the upper side along the partition wall. Therefore, as shown in FIG. 7, members (hereinafter referred to as cell guides) for guiding the four corners of the container are arranged on the partition wall.

従来からセルガイド１には形鋼が使用されており、とりわけ図９に示すような等辺山形鋼４をリブ５に溶接したものが広く使用されている。図８は、このセルガイド１の斜視図である。等辺山形鋼４は、辺の長さ130〜150mm程度，厚みが15mm程度のものが一般的である。リブ５は、厚み10〜15mm程度の鋼板をＴ字型に切断したものであり、等辺山形鋼４を隔壁３に固定する役割を担う。なお、等辺山形鋼４の外側面同士の間隔Ｌは、最近では60mm程度とすることが多い。この図９に示すセルガイドを製造する際には、鋼板を切断してリブ５を製造し、さらにそのリブ５に等辺山形鋼４を溶接する。等辺山形鋼４の２辺とリブ５とを溶接するので、狭い空間での溶接作業となるばかりでなく、溶接部が長くなり、セルガイド１の製造過程で生産性低下の問題が生じる。   Conventionally, a section steel has been used for the cell guide 1, and in particular, one in which an equilateral mountain section steel 4 as shown in FIG. 9 is welded to a rib 5 is widely used. FIG. 8 is a perspective view of the cell guide 1. The equilateral angle steel 4 generally has a side length of about 130 to 150 mm and a thickness of about 15 mm. The rib 5 is obtained by cutting a steel plate having a thickness of about 10 to 15 mm into a T shape, and plays a role of fixing the equilateral mountain steel 4 to the partition wall 3. In addition, the space | interval L between the outer surfaces of the equilateral angle steel 4 is often about 60 mm recently. When the cell guide shown in FIG. 9 is manufactured, the steel plate is cut to manufacture the rib 5, and the equilateral mountain steel 4 is welded to the rib 5. Since the two sides of the equilateral angle steel 4 and the rib 5 are welded, not only the welding operation is performed in a narrow space, but also the welded portion becomes long, and a problem of productivity reduction occurs in the manufacturing process of the cell guide 1.

これに対して特許文献１には、図10に示す形状の形鋼を用いるセルガイドが開示されている。図11は、図10に示すセルガイド用形鋼の断面図である。この技術は、図10に示す形状のセルガイド用形鋼６を用いるので、セルガイドの強度を高めるとともに、リブ（図示せず）の形状を矩形あるいは台形にすることによって溶接箇所を減少させることができる。その結果、セルガイドの製造に要する所要時間の短縮と製造コストの削減を達成できる。なお特許文献１では、セルガイド用形鋼６を製造する過程で図12に示すような孔型を有する上下一対の圧延ロール（いわゆるカリバーロール）を順次使用する。そして、得られるセルガイド用形鋼６の脚部８の外側面同士の間隔Ｌは90mmである。   On the other hand, Patent Document 1 discloses a cell guide using a shape steel having the shape shown in FIG. FIG. 11 is a cross-sectional view of the cell guide section shown in FIG. Since this technique uses the cell guide shape 6 shown in FIG. 10, the strength of the cell guide is increased and the number of welds is reduced by making the rib (not shown) rectangular or trapezoidal. Can do. As a result, it is possible to shorten the time required for manufacturing the cell guide and reduce the manufacturing cost. In Patent Document 1, a pair of upper and lower rolling rolls (so-called caliber rolls) having a hole shape as shown in FIG. 12 are sequentially used in the process of manufacturing the cell guide section 6. And the space | interval L of the outer surfaces of the leg part 8 of the obtained section steel 6 for cell guides is 90 mm.

脚部８の外側面同士の間隔Ｌが大きくなると、図７に示すコンテナ２の隙間が広がるので、コンテナの収容効率が低下する。コンテナの収容効率を高めるためには、脚部８の外側面同士の間隔Ｌを小さくしなければならない。
特許文献１に開示された技術を用いて図10に示すようなセルガイド用形鋼６を製造するにあたって、脚部８の外側面同士の間隔Ｌを60mm程度とするためには、図13に示すような孔型を有する圧延ロールを使用する必要がある。しかも、図10に開示されたセルガイド用形鋼６の底辺10は平坦であり、その底辺10を平坦に形成するためには、図13の上ロールの凸部先端の平面が底辺10に接触する必要がある。 When the distance L between the outer surfaces of the leg portions 8 is increased, the gap between the containers 2 shown in FIG. 7 is widened, so that the container accommodation efficiency is lowered. In order to increase the container accommodation efficiency, the interval L between the outer surfaces of the legs 8 must be reduced.
In manufacturing the cell guide shaped steel 6 as shown in FIG. 10 using the technique disclosed in Patent Document 1, in order to set the distance L between the outer surfaces of the legs 8 to about 60 mm, FIG. It is necessary to use a rolling roll having a hole shape as shown. In addition, the base 10 of the cell guide structural steel 6 disclosed in FIG. 10 is flat, and in order to form the base 10 flat, the plane of the top end of the convex portion of the upper roll shown in FIG. There is a need to.

すなわち特許文献１に開示された技術では、セルガイド用形鋼６の脚部８の外側面同士の間隔Ｌを狭めるために、図13に示すように上ロールの凸部の幅を小さくする必要があり、しかも、その上ロールの凸部を下ロールの凹部の深奥まで挿入しなければならない。セルガイド用形鋼６は熱間圧延で製造されるので、上ロールの凸部の温度は圧延中に著しく上昇し、変形や破損等が生じ易くなる。つまり特許文献１に開示された技術では、脚部８の外側面同士の間隔が狭いセルガイド用形鋼６を安定して大量に製造することは困難である。
特開2002-274483号公報 That is, in the technique disclosed in Patent Document 1, it is necessary to reduce the width of the convex portion of the upper roll as shown in FIG. 13 in order to reduce the distance L between the outer surfaces of the legs 8 of the cell guide structural steel 6. In addition, the convex portion of the upper roll must be inserted deeply into the concave portion of the lower roll. Since the cell guide shaped steel 6 is manufactured by hot rolling, the temperature of the convex portion of the upper roll rises significantly during rolling, and deformation and breakage are likely to occur. In other words, with the technique disclosed in Patent Document 1, it is difficult to stably manufacture a large number of cell guide shaped steels 6 in which the distance between the outer surfaces of the leg portions 8 is narrow.
Japanese Patent Laid-Open No. 2002-274483

本発明は、セルガイドとして使用するにあたってコンテナ船内におけるコンテナの収容効率を向上するセルガイド用形鋼を、熱間圧延で効率良く製造することによって製造コストを削減できるセルガイド用形鋼の熱間圧延方法および熱間圧延設備を提供することを目的とする。   The present invention relates to a cell guide shape steel that can reduce the manufacturing cost by efficiently producing a shape steel for cell guide that improves container accommodation efficiency in a container ship when used as a cell guide by hot rolling. An object is to provide a rolling method and a hot rolling facility.

本発明は、所定の温度に加熱した矩形断面の鋼素材に、上下一対のカリバーロールを複数組用いる成形設備にて圧下を施して、長手方向に垂直な断面の中央に円弧状の形状を呈する湾曲部を有しかつ湾曲部から斜め方向に延伸する２枚の脚部と前記脚部の先端から該脚部の延伸方向と垂直方向かつ外側に延伸する２枚の突出部とを有する中間素材とした後、成形設備の出側に配設され、前記脚部の外側面に接触する左右一対の曲げロールを少なくとも１組用いる曲げ設備にて中間素材の湾曲部に曲げ加工を施してセルガイド用形鋼を得る熱間圧延方法である。
In the present invention, a steel material having a rectangular cross section heated to a predetermined temperature is subjected to reduction by a forming facility using a plurality of pairs of upper and lower caliber rolls to exhibit an arc shape at the center of the cross section perpendicular to the longitudinal direction. An intermediate material having two curved portions having a curved portion and extending obliquely from the curved portion, and two protruding portions extending from the distal end of the leg portion in a direction perpendicular to the extending direction of the leg portion and outward. After that, the cell guide is formed by bending the curved portion of the intermediate material in a bending facility that is disposed on the exit side of the molding facility and uses at least one pair of left and right bending rolls that contact the outer surface of the leg portion. This is a hot rolling method for obtaining a structural steel.

また本発明は、所定の温度に加熱した矩形断面の鋼素材に、上下一対のカリバーロールを複数組用いて圧下を施し、長手方向に垂直な断面の中央に円弧状の形状を呈する湾曲部を有しかつ湾曲部から斜め方向に延伸する２枚の脚部とその脚部の先端から該脚部の延伸方向と垂直方向かつ外側に延伸する２枚の突出部とを有する中間素材とする成形設備と、成形設備の出側に配設され、前記脚部の外側面に接触する左右一対の曲げロールを少なくとも１組用いて中間素材の湾曲部に曲げ加工を施してセルガイド用形鋼とする曲げ設備と、を有する熱間圧延設備である。 Further, the present invention provides a rectangular cross-section steel material heated to a predetermined temperature by using a plurality of pairs of upper and lower caliber rolls, and a curved portion exhibiting an arc shape at the center of the cross section perpendicular to the longitudinal direction. And forming an intermediate material having two leg portions extending obliquely from the curved portion and two projecting portions extending from the tip of the leg portion in a direction perpendicular to the extending direction of the leg portion and outward. A cell guide shaped steel that is bent on the curved portion of the intermediate material by using at least one pair of right and left bending rolls arranged on the exit side of the equipment and the forming equipment and in contact with the outer surface of the leg portion ; And a bending facility for hot rolling.

なお本発明で得られるセルガイド用形鋼は、湾曲部が円弧状の形状を呈するが、必ずしも真円の円弧である必要はなく、楕円の円弧であっても良い。   In the cell guide steel obtained in the present invention, the curved portion has an arc shape, but it is not necessarily a perfect circular arc, and may be an elliptical arc.

本発明によれば、セルガイド用形鋼を熱間圧延で効率良く製造でき、製造コストの削減が可能である。また、セルガイドとして使用するにあたって、コンテナ船内におけるコンテナの収容効率の向上を達成できる。   According to the present invention, the cell guide section can be efficiently manufactured by hot rolling, and the manufacturing cost can be reduced. In addition, when used as a cell guide, it is possible to achieve an improvement in container accommodation efficiency in a container ship.

まず、本発明のセルガイド用形鋼について説明する。
図１は、本発明を適用して得られるセルガイド用形鋼の例を模式的に示す断面図である。その断面は、セルガイド用形鋼の長手方向に垂直な面である。
図１に示すように、本発明によって得られるセルガイド用形鋼６は、円弧状の湾曲部７，湾曲部７の両端から互いに平行に延伸される２枚の脚部８，脚部８の先端から垂直方向かつ外側に延伸される２枚の突出部９からなる。つまり、脚部８の一端は湾曲部７に連結され、他端は突出部９に連結される。湾曲部７は、図11に示すセルガイド用形鋼のような平坦ではなく、湾曲した円弧状の形状である。この点については、セルガイド用形鋼６の熱間圧延に関連して後述する。なお、脚部８と湾曲部７を総称してＵ字形部と記す。 First, the cell guide shape steel of the present invention will be described.
FIG. 1 is a cross-sectional view schematically showing an example of a section steel for cell guide obtained by applying the present invention. The cross section is a plane perpendicular to the longitudinal direction of the cell guide steel.
As shown in FIG. 1, the cell guide section 6 obtained by the present invention includes an arcuate curved portion 7, two leg portions 8 extending in parallel from both ends of the curved portion 7, and the leg portions 8. It consists of two protrusions 9 extending vertically and outward from the tip. That is, one end of the leg portion 8 is connected to the curved portion 7 and the other end is connected to the protruding portion 9. The curved portion 7 is not flat like the cell guide steel shown in FIG. 11, but has a curved arc shape. This point will be described later in relation to hot rolling of the cell guide section 6. Note that the leg portion 8 and the curved portion 7 are collectively referred to as a U-shaped portion.

このセルガイド用形鋼６をリブ５に溶接してセルガイドとする。図２は、そのセルガイドの例を示す断面図である。図３は、図２に示すセルガイドの斜視図である。セルガイド用形鋼６は熱間圧延で一体的に成形されるので、十分な強度を有する。そのためセルガイドを製造するにあたってＵ字形部の内側にリブ５を充填する必要はなく、セルガイドの組立てが容易になる。つまり溶接する部位はセルガイド用形鋼６とリブ５との接触面のみとなり、図９に示すセルガイドに比べて溶接長さを大幅に減少できる。   This cell guide section 6 is welded to the rib 5 to form a cell guide. FIG. 2 is a cross-sectional view showing an example of the cell guide. FIG. 3 is a perspective view of the cell guide shown in FIG. Since the cell guide section 6 is integrally formed by hot rolling, it has sufficient strength. Therefore, when manufacturing the cell guide, it is not necessary to fill the rib 5 inside the U-shaped portion, and the assembly of the cell guide is facilitated. That is, only the contact surface between the cell guide structural steel 6 and the rib 5 is welded, and the welding length can be greatly reduced as compared with the cell guide shown in FIG.

脚部８の外側面同士の間隔Ｌは30〜80mmの範囲内が好ましい。脚部８の外側面同士の間隔Ｌが30mm未満では、Ｕ字形部の内側が狭くなるので、熱間圧延でセルガイド用形鋼を製造することが困難になる。一方、間隔Ｌが80mmを超えると、湾曲部７の半径が大きくなるにつれて、脚部８の長さが短縮されるので、コンテナの４隅を案内する機能が低下するばかりでなく、図７に示すコンテナ２の隙間が広がるので、コンテナ２の収容効率が低下する。   The distance L between the outer surfaces of the legs 8 is preferably in the range of 30 to 80 mm. If the distance L between the outer surfaces of the leg portions 8 is less than 30 mm, the inside of the U-shaped portion becomes narrow, so that it becomes difficult to manufacture the cell guide shape steel by hot rolling. On the other hand, when the distance L exceeds 80 mm, the length of the leg portion 8 is shortened as the radius of the curved portion 7 increases, so that not only the function of guiding the four corners of the container is deteriorated, but also FIG. Since the gap between the containers 2 shown is widened, the accommodation efficiency of the containers 2 is reduced.

次に、本発明のセルガイド用形鋼の熱間圧延について説明する。
図４は、セルガイド用形鋼の熱間圧延で使用する圧延ロール（すなわちカリバーロール，曲げロール）を順次示す断面図である。
矩形の断面を有する鋼素材を所定の温度に加熱した後、図４の(a)〜(d)に示すように上下一対で１組をなすカリバーロールで順次圧下を施して、長手方向に垂直な断面の中央に円弧状の形状を呈する湾曲部を有しかつ湾曲部から斜め方向に延伸する２枚の脚部とその脚部の先端から外側に延伸する２枚の突出部とを有するＷ字形状を呈する中間素材を得る。この段階で、脚部と突出部が直角をなすように圧下を加えることが好ましい。なお、図４には４組のカリバーロールを使用する例を示したが、本発明ではカリバーロールの数は４組に限定しない。カリバーロールの数は、鋼素材の寸法や材質等に応じて適宜設定する。なお、この複数組のカリバーロール（図４の例では(a)から(d)まで）を用いて中間素材を得る設備を成形設備と記す。 Next, hot rolling of the section steel for cell guides of the present invention will be described.
FIG. 4 is a cross-sectional view sequentially showing rolling rolls (that is, a caliber roll and a bending roll) used in hot rolling of the section steel for cell guide.
After heating a steel material having a rectangular cross section to a predetermined temperature, as shown in FIGS. 4 (a) to (d), the steel material is sequentially reduced with a pair of upper and lower caliber rolls, and perpendicular to the longitudinal direction. W having a curved portion exhibiting an arc shape at the center of a simple cross section, and having two leg portions extending obliquely from the curved portion and two projecting portions extending outward from the distal ends of the leg portions An intermediate material with a letter shape is obtained. At this stage, it is preferable to apply the reduction so that the leg portion and the protruding portion form a right angle. In addition, although the example which uses 4 sets of caliber rolls was shown in FIG. 4, in this invention, the number of caliber rolls is not limited to 4 sets. The number of caliber rolls is appropriately set according to the size and material of the steel material. In addition, equipment for obtaining an intermediate material using the plurality of sets of caliber rolls (from (a) to (d) in the example of FIG. 4) is referred to as molding equipment.

成形設備の出側では、左右一対で１組をなす曲げロールを少なくとも１組用いて中間素材の湾曲部に曲げ加工を施して、セルガイド用形鋼とする。なお、図４には２組の曲げロールを使用する例を示したが、本発明では曲げロールの数は２組に限定しない。曲げロールの数は、鋼素材の寸法や材質等に応じて適宜設定する。なお、この少なくとも１組の曲げロール（図４の例では(e)から(f)まで）を用いて中間素材に曲げ加工を施す設備を曲げ設備と記す。   On the exit side of the molding equipment, the bending portion of the intermediate material is bent using at least one pair of bending rolls that form a pair of left and right pairs, thereby obtaining a cell guide shape steel. In addition, although the example which uses 2 sets of bending rolls was shown in FIG. 4, in the present invention, the number of bending rolls is not limited to 2 sets. The number of bending rolls is appropriately set according to the dimensions and material of the steel material. The equipment for bending the intermediate material using at least one set of bending rolls (from (e) to (f) in the example of FIG. 4) is referred to as bending equipment.

曲げロールは、脚部の外側面に接触する面が平坦なロールである。図４(e)，(f)には断面形状が台形（つまり円錐状）の曲げロール12a，12bを用いる例を示したが、図14(a)に示すような断面形状が矩形（つまり円筒状）の曲げロール12a，12bを用いても良い。また曲げロールとして、駆動装置に連結したロール（いわゆる駆動ロール）を使用しても良いし、あるいは駆動力が作用しないロール（いわゆる無駆動ロール）を使用しても良い。   The bending roll is a roll having a flat surface in contact with the outer surface of the leg portion. FIGS. 4 (e) and 4 (f) show an example in which bending rolls 12a and 12b having a trapezoidal shape (that is, a conical shape) are used. However, the sectional shape as shown in FIG. Shaped bending rolls 12a and 12b may be used. Further, as the bending roll, a roll (so-called driving roll) connected to a driving device may be used, or a roll (so-called non-driving roll) in which a driving force does not act may be used.

また曲げロール12a，12bに加えて、曲げ加工の寸法精度を向上させる目的で図14(b)に示すような補助ロール13を使用しても良い。
さらに曲げロール12a，12bは、脚部の外側面に接触する面が平坦ではなく、図14(c)に示すように湾曲部７に沿う形状に加工されたものを使用しても良い。
曲げ設備ではカリバーロールを使用しないので、Ｕ字形状部内は空洞となる。したがって、カリバーロールの凸部の変形や破損を抑制できる。また、湾曲部には圧下が加えられないので、曲げ加工によって円弧状に湾曲したＵ字形状となる。なお湾曲部は、必ずしも真円の円弧である必要はなく、楕円の円弧であっても良い。 Further, in addition to the bending rolls 12a and 12b, an auxiliary roll 13 as shown in FIG. 14 (b) may be used for the purpose of improving the dimensional accuracy of the bending process.
Further, as the bending rolls 12a and 12b, the surfaces that contact the outer surface of the leg portion are not flat, and those processed into a shape along the curved portion 7 as shown in FIG. 14 (c) may be used.
Since the caliber roll is not used in the bending equipment, the U-shaped portion is hollow. Therefore, deformation and breakage of the convex portion of the caliber roll can be suppressed. In addition, since no reduction is applied to the curved portion, a U-shape curved in an arc shape by bending is formed. The curved portion does not necessarily have to be a perfect circular arc, but may be an elliptical arc.

このようにして、成形設備と曲げ設備からなる本発明の熱間圧延設備を用いてセルガイド用形鋼を製造すれば、カリバーロールの変形や破損を抑制でき、かつ孔型の数を削減できる。その結果、セルガイド用形鋼の生産性が大幅に向上する。
また、曲げロールを用いて湾曲部の曲げ加工を行なうことによって、従来のカリバーロールによる加工に比べて摩擦を減少することが可能となり、セルガイド用形鋼に表面疵が発生するのを防止できる。 Thus, if the cell guide steel is manufactured using the hot rolling equipment of the present invention comprising the forming equipment and the bending equipment, deformation and breakage of the caliber roll can be suppressed, and the number of hole molds can be reduced. . As a result, the productivity of the cell guide section is greatly improved.
In addition, by bending the bending portion using a bending roll, it becomes possible to reduce friction compared to the processing using a conventional caliber roll, and it is possible to prevent surface flaws from occurring in the shape steel for cell guide. .

矩形断面の鋼素材を熱間圧延して、図５に示す寸法（単位はmm）を有するセルガイド用形鋼（長さ20ｍ）を製造した。カリバーロールは図４(a)〜(d)に示す孔型を有するものを４組使用し、曲げロールは図４(e)〜(f)に示すように２組使用した。このセルガイド用形鋼を発明例とする。
一方、比較例として、図６(a)〜(f)に示す孔型を有するカリバーロールを６組使用して矩形断面の鋼素材を熱間圧延することによって、図５に示す寸法（単位はmm）を有するセルガイド用形鋼（長さ20ｍ）を製造した。 A steel material having a rectangular cross section was hot-rolled to produce a section steel for cell guide (length: 20 m) having the dimensions (unit: mm) shown in FIG. Four sets of caliber rolls having the hole types shown in FIGS. 4 (a) to (d) were used, and two sets of bending rolls were used as shown in FIGS. 4 (e) to (f). This section steel for cell guide is an invention example.
On the other hand, as a comparative example, by using 6 sets of caliber rolls having the hole types shown in FIGS. 6A to 6F, hot rolling a steel material having a rectangular cross section, the dimensions shown in FIG. mm) for the cell guide (length 20 m).

得られたセルガイド用形鋼（発明例，比較例いずれも50本ずつ）の表面を調査したところ、比較例では、多数（発生比率38％）のセルガイド用形鋼でＵ字形状部の内面に表面疵が発生した。発生比率は、セルガイド用形鋼の本数をＮMとし、表面疵が発生したセルガイド用形鋼の本数をＮDとして、100×ＮD／ＮMで算出される値である。この表面疵は図６(f)に示す下ロールの凸部の破損が原因である。Ｕ字形状部の内面に表面疵が発生すると、図６(f)に示す下ロールを交換するために操業を停止せざるを得ないので、生産効率の低下を招く。また、Ｕ字形状部内に潤滑油を供給すれば、表面疵を防止することは可能である。しかし潤滑油を使用すると、表面疵は防止できるが、セルガイド用形鋼の製造コストが上昇する。 When the surface of the obtained cell guide shape steel (50 samples for each of the inventive example and the comparative example) was investigated, in the comparative example, a large number of cell guide shape steels (occurrence ratio: 38%) Surface flaws occurred on the inner surface. Generation ratio, the number of cell guide section steel and N M, the number of cell guide shaped steel surface defects occur as N D, is a value calculated by 100 × N D / N M. This surface flaw is caused by breakage of the convex portion of the lower roll shown in FIG. If surface flaws occur on the inner surface of the U-shaped part, the operation must be stopped to replace the lower roll shown in FIG. 6 (f), leading to a decrease in production efficiency. Further, if the lubricating oil is supplied into the U-shaped portion, it is possible to prevent surface flaws. However, when lubricating oil is used, surface flaws can be prevented, but the manufacturing cost of the section steel for cell guides increases.

これに対して発明例では、表面疵が発生したセルガイド用形鋼は極めて少数（発生比率２％）であり、良好な表面性状が得られた。
このようにして、本発明によれば、優れた表面性状を有するセルガイド用形鋼を効率良く製造でき、製造コストの削減が可能であることが確かめられた。しかも脚部の外表面同士の間隔Ｌが60mm程度のセルガイド用形鋼を容易に得ることができるので、セルガイドとして使用した場合に、間隔Ｌが90mm程度の従来のセルガイド用形鋼と比べて、コンテナの収容効率が向上する。 On the other hand, in the invention example, the cell guide shape steel in which surface flaws occurred was very small (generation ratio 2%), and good surface properties were obtained.
As described above, according to the present invention, it was confirmed that the cell guide steel having excellent surface properties can be efficiently manufactured, and the manufacturing cost can be reduced. In addition, since a cell guide steel with a distance L between the outer surfaces of the leg portions of about 60 mm can be easily obtained, when used as a cell guide, a conventional cell guide steel with a distance L of about 90 mm can be obtained. In comparison, the container accommodation efficiency is improved.

本発明のセルガイド用形鋼の例を模式的に示す断面図である。It is sectional drawing which shows the example of the shape steel for cell guides of this invention typically. 図１に示すセルガイド用形鋼を用いて製造したセルガイドの例を模式的に示す断面図である。It is sectional drawing which shows typically the example of the cell guide manufactured using the structural steel for cell guides shown in FIG. 図２に示すセルガイドの斜視図である。It is a perspective view of the cell guide shown in FIG. 本発明で用いるカリバーにロールの孔型を順次示す断面図である。It is sectional drawing which shows the hole type | mold of a roll sequentially to the caliber used by this invention. 発明例のセルガイド用形鋼の寸法を示す断面図である。It is sectional drawing which shows the dimension of the structural steel for cell guides of the invention example. 比較のために用いたカリバーにロールの孔型を順次示す断面図である。It is sectional drawing which shows the hole type | mold of a roll sequentially to the caliber used for the comparison. セルガイドを隔壁に配設する例を模式的に示す断面図である。It is sectional drawing which shows typically the example which arrange | positions a cell guide to a partition. 従来のセルガイドの例を示す斜視図である。It is a perspective view which shows the example of the conventional cell guide. 図８に示すセルガイドを拡大して示す断面図である。It is sectional drawing which expands and shows the cell guide shown in FIG. 従来のセルガイドの他の例を模式的に示す斜視図である。It is a perspective view which shows the other example of the conventional cell guide typically. 図10に示すセルガイド用形鋼の断面図である。FIG. 11 is a cross-sectional view of the cell guide section shown in FIG. 図10に示すセルガイド用形鋼の製造過程で使用するカリバーロールの孔型を順次示す断面図である。FIG. 11 is a cross-sectional view sequentially showing a hole shape of a caliber roll used in the manufacturing process of the section steel for cell guide shown in FIG. 図10に示すセルガイド用形鋼の脚部の外側面同士の間隔を狭めるために使用する圧延ロールの孔型を示す断面図である。FIG. 11 is a cross-sectional view showing a hole shape of a rolling roll used for narrowing the distance between the outer surfaces of the leg portions of the cell guide shape steel shown in FIG. 曲げロールと補助ロールの例を模式的に示す断面図である。It is sectional drawing which shows the example of a bending roll and an auxiliary | assistant roll typically.

符号の説明Explanation of symbols

１ セルガイド
２ コンテナ
３ 隔壁
４ 等辺山形鋼
５ リブ
６ セルガイド用形鋼
７ 湾曲部
８ 脚部
９ 突出部
10 底辺
11a カリバーロール
11b カリバーロール
12a 曲げロール
12b 曲げロール
13 補助ロール
DESCRIPTION OF SYMBOLS 1 Cell guide 2 Container 3 Bulkhead 4 Equilateral angle steel 5 Rib 6 Shape steel for cell guide 7 Curved part 8 Leg part 9 Protrusion part
10 Bottom
11a Caliber Roll
11b Caliber Roll
12a bending roll
12b bending roll
13 Auxiliary roll

Claims (2)

所定の温度に加熱した矩形断面の鋼素材に、上下一対のカリバーロールを複数組用いる成形設備にて圧下を施して、長手方向に垂直な断面の中央に円弧状の形状を呈する湾曲部を有しかつ前記湾曲部から斜め方向に延伸する２枚の脚部と前記脚部先端から該脚部の延伸方向と垂直方向かつ外側に延伸する２枚の突出部とを有する中間素材とした後、前記成形設備の出側に配設され、前記脚部の外側面に接触する左右一対の曲げロールを少なくとも１組用いる曲げ設備にて前記中間素材の前記湾曲部に曲げ加工を施してセルガイド用形鋼を得ることを特徴とするセルガイド用形鋼の熱間圧延方法。 A steel material having a rectangular cross section heated to a predetermined temperature is subjected to reduction by a forming facility using a plurality of pairs of upper and lower caliber rolls, and has a curved portion exhibiting an arc shape at the center of the cross section perpendicular to the longitudinal direction. And an intermediate material having two leg portions extending obliquely from the curved portion and two projecting portions extending from the distal end of the leg portion in a direction perpendicular to the extending direction of the leg portion and outward. For the cell guide by bending the curved portion of the intermediate material in a bending facility that is disposed on the exit side of the molding facility and uses at least one pair of left and right bending rolls that contact the outer surface of the leg portion . A method for hot rolling a section steel for a cell guide, characterized by obtaining a section steel. 所定の温度に加熱した矩形断面の鋼素材に、上下一対のカリバーロールを複数組用いて圧下を施し、長手方向に垂直な断面の中央に円弧状の形状を呈する湾曲部を有しかつ前記湾曲部から斜め方向に延伸する２枚の脚部と前記脚部の先端から該脚部の延伸方向と垂直方向かつ外側に延伸する２枚の突出部とを有する中間素材とする成形設備と、前記成形設備の出側に配設され、前記脚部の外側面に接触する左右一対の曲げロールを少なくとも１組用いて前記中間素材の前記湾曲部に曲げ加工を施してセルガイド用形鋼とする曲げ設備と、を有することを特徴とするセルガイド用形鋼の熱間圧延設備。
The steel material having a rectangular cross section heated to a predetermined temperature is subjected to reduction by using a plurality of pairs of upper and lower caliber rolls, and has a curved portion exhibiting an arc shape at the center of the cross section perpendicular to the longitudinal direction, and the curved A molding facility as an intermediate material having two leg portions extending obliquely from a portion and two projecting portions extending from a tip end of the leg portion in a direction perpendicular to the extending direction of the leg portion and outward, and A cell guide shape steel is formed by bending the curved portion of the intermediate material using at least one pair of left and right bending rolls arranged on the exit side of the forming equipment and contacting the outer surface of the leg portion. A hot rolling facility for a section steel for a cell guide, comprising: a bending facility.
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