JP4046740B2 - Manufacturing method of beam material - Google Patents

Manufacturing method of beam material Download PDF

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JP4046740B2
JP4046740B2 JP2005162070A JP2005162070A JP4046740B2 JP 4046740 B2 JP4046740 B2 JP 4046740B2 JP 2005162070 A JP2005162070 A JP 2005162070A JP 2005162070 A JP2005162070 A JP 2005162070A JP 4046740 B2 JP4046740 B2 JP 4046740B2
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steel plate
roll
plate portion
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thin
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JP2006334632A (en
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伸 中島
教雄 中島
拓 中島
功雄 中島
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ナカジマ鋼管株式会社
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Description

本発明は、たとえば鉄骨構造物に使用される梁材の製造方法に関するものである。 The present invention relates to the production how the beam members to be used, for example, steel structure.

従来、この種の梁材としては、次のような構成が提供されている。すなわち、梁(梁材)としては、上下一対のフランジとウエブ部とからなるI型鋼(H型鋼)が使用されている(たとえば、特許文献1参照。)。
特開平9−111872号公報(第2−3頁、図1) 特開平5−148894号公報(第2頁、図1)
Conventionally, the following configurations are provided as this type of beam material. That is, as a beam (beam material), I-shaped steel (H-shaped steel) composed of a pair of upper and lower flanges and a web portion is used (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 9-111182 (page 2-3, FIG. 1) JP-A-5-148894 (2nd page, FIG. 1)

上記した従来構成によると、I型鋼(H型鋼)として、たとえば、フランジ板厚が22mm、ウエブ部板厚が12mm、フランジ幅が250mm、両フランジの外面間の高さが600mmのものを採用したとき、[フランジ板厚>ウエブ部板厚]の構成により、すなわちウエブ部の板厚を薄く形成したことにより、使用材料の重量を軽くしながらも、所定(規格)の強度などを確保できる。そしてI型鋼(H型鋼)は、圧延により製造されている。   According to the above-described conventional configuration, for example, I-type steel (H-type steel) having a flange plate thickness of 22 mm, a web portion plate thickness of 12 mm, a flange width of 250 mm, and a height between outer surfaces of both flanges of 600 mm is employed. In some cases, the structure of [flange plate thickness> web portion plate thickness], that is, by forming the web portion thin, it is possible to ensure a predetermined (standard) strength while reducing the weight of the material used. And I type steel (H type steel) is manufactured by rolling.

しかし、上記した従来構成によると、曲げモーメント値を上げたり、横揺れを少なくするために強度などを向上させようとしたとき、ウエブ部の板厚を厚くするなどしなければならず、使用材料の重量が重くなることになる。   However, according to the conventional configuration described above, when trying to increase the bending moment value or improve the strength in order to reduce the roll, it is necessary to increase the thickness of the web portion, etc. Will be heavy.

そこで本発明の請求項1記載の発明は、使用材料の重量を重くすることなく、曲げモーメント値を上げた梁材を能率良く得られる梁材の製造方法を提供することを目的としたものである。   Accordingly, an object of the present invention is to provide a beam material manufacturing method that can efficiently obtain a beam material having an increased bending moment value without increasing the weight of the material used. is there.

前述した目的を達成するために、本発明の請求項1記載の梁材の製造方法は、所定温度、またはその近辺にまで全体加熱されている鋼板は、幅方向において所定部分が薄肉鋼板部で残部が厚肉鋼板部として形成されており、この鋼板を長さ方向に搬送しながらロール式成形手段により、薄肉鋼板部と厚肉鋼板部とがコーナ部を介して直角状に位置する型状鋼板に熱間成形し、1対の型状鋼板を、その鋼板部の遊端を相対向させた状態で溶接結合して四角形状鋼管に形成したことを特徴としたものである。   In order to achieve the above-described object, the beam material manufacturing method according to claim 1 of the present invention is such that a predetermined portion of the steel plate that is heated to a predetermined temperature or its vicinity is a thin steel plate portion in the width direction. The remaining part is formed as a thick steel plate part, and the thin steel plate part and the thick steel plate part are positioned at right angles via the corner part by roll-type forming means while conveying the steel sheet in the length direction. The steel sheet is hot-formed into a steel plate, and a pair of shaped steel plates are welded and joined to each other with the free ends of the steel plate portions facing each other to form a square steel pipe.

したがって請求項1の発明によると、加熱した鋼板を長さ方向に搬送しながらロール式成形手段により熱間成形することで、鋼板から型状鋼板への成形を流れ作業的に行え、そして1対の型状鋼板間を溶接結合することで、四角形状鋼管に形成した梁材を製造し得る。この梁材は、四角形状鋼管に形成しながらも、左右の薄肉鋼板部により、I型鋼(H型鋼)の形式に比べて使用材料の重量を重くすることなく形成し得る。しかも梁材は、コーナ部を熱間成形して四角形状鋼管に形成したことで、I型鋼(H型鋼)の形式に比べて曲げモーメント値を上げ得る。   Therefore, according to the first aspect of the present invention, the hot-rolled steel sheet is hot-formed by the roll-type forming means while transporting the heated steel sheet in the length direction, so that the forming from the steel sheet to the shaped steel sheet can be performed in a flow-oriented manner. The beam material formed in the square-shaped steel pipe can be manufactured by welding and joining between the shaped steel plates. While this beam material is formed in a rectangular steel pipe, it can be formed by left and right thin steel plate portions without increasing the weight of the material used compared to the type of I-shaped steel (H-shaped steel). Moreover, the beam material can be increased in bending moment value compared to the type of I-shaped steel (H-shaped steel) by hot forming the corner portion to form a rectangular steel pipe.

また本発明の請求項2記載の梁材の製造方法は、上記した請求項1記載の構成において、鋼板は、幅方向において中央部分が薄肉鋼板部で両側部分が短尺の厚肉鋼板部として形成されており、この鋼板を長さ方向に搬送しながらロール式成形手段により、薄肉鋼板部と短尺の両厚肉鋼板部とがそれぞれコーナ部を介して直角状に位置するU字型状鋼板に熱間成形し、1対のU字型状鋼板を、その厚肉鋼板部の遊端を相対向させた状態で溶接結合して四角形状鋼管に形成したことを特徴としたものである。   The beam material manufacturing method according to claim 2 of the present invention is the structure according to claim 1, wherein the steel plate is formed as a thick steel plate portion having a thin steel plate portion at the central portion and short side portions in the width direction. The U-shaped steel plate, in which the thin steel plate portion and the short both thick steel plate portions are respectively positioned at right angles via the corner portions, by means of roll-type forming means while transporting the steel plate in the length direction. It is characterized by being formed into a square steel pipe by hot forming and welding-bonding a pair of U-shaped steel plates with the free ends of the thick steel plate portions facing each other.

したがって請求項2の発明によると、加熱した鋼板を長さ方向に搬送しながらロール式成形手段により熱間成形することで、鋼板からU字型状鋼板への成形を流れ作業的に行え、そして1対のU字型状鋼板における厚肉鋼板部の遊端間を溶接結合することで、四角形状鋼管に形成した梁材を製造し得る。この梁材は、四角形状鋼管に形成しながらも、左右の薄肉鋼板部により、I型鋼(H型鋼)の形式に比べて使用材料の重量を重くすることなく形成し得る。しかも梁材は、4箇所のコーナ部を熱間成形して四角形状鋼管に形成したことで、I型鋼(H型鋼)の形式に比べて曲げモーメント値を上げ得る。   Therefore, according to the invention of claim 2, by hot forming by the roll-type forming means while conveying the heated steel plate in the length direction, the forming from the steel plate to the U-shaped steel plate can be performed in a flow work, and The beam material formed in the square steel pipe can be manufactured by welding between the free ends of the thick steel plate portions in the pair of U-shaped steel plates. While this beam material is formed in a rectangular steel pipe, it can be formed by left and right thin steel plate portions without increasing the weight of the material used compared to the type of I-shaped steel (H-shaped steel). In addition, the beam material can be formed into a rectangular steel pipe by hot forming the four corners, thereby increasing the bending moment value as compared with the type of I-shaped steel (H-shaped steel).

そして本発明の請求項3記載の梁材の製造方法は、上記した請求項1記載の構成において、鋼板は、幅方向において両側部分が短尺の薄肉鋼板部で中央部分が厚肉鋼板部として形成されており、この鋼板を長さ方向に搬送しながらロール式成形手段により、短尺の両薄肉鋼板部と厚肉鋼板部とがそれぞれコーナ部を介して直角状に位置するU字型状鋼板に熱間成形し、1対のU字型状鋼板を、短尺の薄肉鋼板部の遊端を相対向させた状態で溶接結合して四角形状鋼管に形成したことを特徴としたものである。   And the manufacturing method of the beam material of Claim 3 of this invention is the structure of Claim 1 mentioned above, A steel plate forms a thin steel plate part whose both sides are short in the width direction, and a central part as a thick steel plate part. The U-shaped steel plate, in which both the thin steel plate portion and the thick steel plate portion are positioned at right angles via the corner portions by roll forming means while transporting the steel plate in the length direction. It is characterized by being formed into a rectangular steel pipe by hot forming and welding-bonding a pair of U-shaped steel plates with the free ends of the short thin steel plates facing each other.

したがって請求項3の発明によると、加熱した鋼板を長さ方向に搬送しながらロール式成形手段により熱間成形することで、鋼板からU字型状鋼板への成形を流れ作業的に行え、そして1対のU字型状鋼板における薄肉鋼板部の遊端間を溶接結合することで、四角形状鋼管に形成した梁材を製造し得る。この梁材は、四角形状鋼管に形成しながらも、左右の薄肉鋼板部により、I型鋼(H型鋼)の形式に比べて使用材料の重量を重くすることなく形成し得る。しかも梁材は、4箇所のコーナ部を熱間成形して四角形状鋼管に形成したことで、I型鋼(H型鋼)の形式に比べて曲げモーメント値を上げ得る。   Therefore, according to the invention of claim 3, by hot forming by the roll-type forming means while conveying the heated steel plate in the length direction, the forming from the steel plate to the U-shaped steel plate can be performed in a flow work, and The beam material formed in the square steel pipe can be manufactured by welding the free ends of the thin steel plate portions in the pair of U-shaped steel plates. While this beam material is formed in a rectangular steel pipe, it can be formed by left and right thin steel plate portions without increasing the weight of the material used compared to the type of I-shaped steel (H-shaped steel). In addition, the beam material can be formed into a rectangular steel pipe by hot forming the four corners, thereby increasing the bending moment value as compared with the type of I-shaped steel (H-shaped steel).

さらに本発明の請求項4記載の梁材の製造方法は、上記した請求項1記載の構成において、鋼板は、幅方向において一側部分が薄肉鋼板部で他側部分が厚肉鋼板部として形成されており、この鋼板を長さ方向に搬送しながらロール式成形手段により、薄肉鋼板部と厚肉鋼板部とがコーナ部を介して直角状に位置するL字型状鋼板に熱間成形し、1対のL字型状鋼板を、その薄肉鋼板部の遊端と厚肉鋼板部の遊端とを相対向させた状態で溶接結合して四角形状鋼管に形成したことを特徴としたものである。   Furthermore, in the method for manufacturing a beam according to claim 4 of the present invention, in the configuration according to claim 1, the steel sheet is formed as a thin steel plate portion on one side and a thick steel plate portion on the other side in the width direction. The steel plate is hot-formed into an L-shaped steel plate in which the thin-walled steel plate portion and the thick-walled steel plate portion are positioned at right angles through the corner portion by means of roll forming means while transporting the steel plate in the length direction. A pair of L-shaped steel plates are formed into a rectangular steel pipe by welding and bonding with the free ends of the thin steel plate portions and the free ends of the thick steel plate portions facing each other. It is.

したがって請求項4の発明によると、加熱した鋼板を長さ方向に搬送しながらロール式成形手段により熱間成形することで、鋼板からL字型状鋼板への成形を流れ作業的に行え、そして1対のL字型状鋼板間を溶接結合することで、四角形状鋼管に形成した梁材を製造し得る。この梁材は、四角形状鋼管に形成しながらも、左右の薄肉鋼板部により、I型鋼(H型鋼)の形式に比べて使用材料の重量を重くすることなく形成し得る。しかも梁材は、2箇所のコーナ部を熱間成形して四角形状鋼管に形成したことで、I型鋼(H型鋼)の形式に比べて曲げモーメント値を上げ得る。   Therefore, according to the invention of claim 4, by hot forming by the roll-type forming means while transporting the heated steel plate in the length direction, the forming from the steel plate to the L-shaped steel plate can be performed in a flow work, and The beam material formed in the square steel pipe can be manufactured by welding the pair of L-shaped steel plates. While this beam material is formed in a rectangular steel pipe, it can be formed by left and right thin steel plate portions without increasing the weight of the material used compared to the type of I-shaped steel (H-shaped steel). In addition, the beam material can be formed into a rectangular steel pipe by hot-forming two corners, so that the bending moment value can be increased as compared with the type of I-shaped steel (H-shaped steel).

しかも本発明の請求項5記載の梁材の製造方法は、上記した請求項1〜4のいずれか1項に記載の構成において、ロール式成形手段は複数段であり、最終段のロール式成形手段は、一方の鋼板部を当てロールと受けロールとにより上下から挟持し、他方の鋼板部の遊端に押しロールを上方から当接させて押し下げ力を作用させるとともに、他方の鋼板部の外面に規制ロールを当接させた状態で熱間成形することを特徴としたものである。   And the manufacturing method of the beam material of Claim 5 of this invention is the structure of any one of Claims 1-4 mentioned above, The roll type | mold shaping | molding means is a multistage, The roll type shaping | molding of the last stage The means sandwiches one steel plate part from above and below by a contact roll and a receiving roll, makes the push roll contact the free end of the other steel plate part from above, and exerts a pressing force, and the outer surface of the other steel plate part It is characterized in that hot forming is performed in a state in which a regulating roll is brought into contact with.

したがって請求項5の発明によると、当てロールと受けロールとにより一方の鋼板部を上下から挟持した状態で、規制ロールにより外面を規制した他方の鋼板部に対して、押しロールにより押し下げ力を作用させることによって、型状鋼板の熱間成形を安定して行える。   Therefore, according to the invention of claim 5, in the state where one steel plate portion is sandwiched from above and below by the contact roll and the receiving roll, a pressing force acts on the other steel plate portion whose outer surface is regulated by the regulating roll. By doing so, hot forming of the shaped steel sheet can be performed stably.

また本発明の請求項6記載の梁材の製造方法は、上記した請求項1〜5のいずれか1項に記載の構成において、両薄肉鋼板部の板厚の加算値に対して、厚肉鋼板部の板厚が等厚状もしくは厚く形成され、両薄肉鋼板部の外面間の幅外寸よりも、両厚肉鋼板部の外面間の高さ外寸が長く形成されていることを特徴としたものである。   Moreover, the manufacturing method of the beam material of Claim 6 of this invention is thick with respect to the addition value of the plate | board thickness of both thin steel plate parts in the structure of any one of above-mentioned Claims 1-5. The plate thickness of the steel plate part is equal or thick, and the height external dimension between the outer surfaces of both thick steel plate parts is longer than the width outer dimension between the outer surfaces of both thin steel plate parts. It is what.

したがって請求項6の発明によると、上下方向で長い長方形状の四角形状鋼管に形成し得ることで、曲げモーメント値をより一層上げた梁材を製造し得る。 Therefore, according to the sixth aspect of the present invention, a beam having a higher bending moment value can be manufactured by forming a rectangular steel pipe having a long rectangular shape in the vertical direction .

上記した本発明の請求項1によると、加熱した鋼板を長さ方向に搬送しながらロール式成形手段により熱間成形することで、鋼板から型状鋼板への成形を流れ作業的に行うことができ、そして1対の型状鋼板間を溶接結合することで、四角形状鋼管に形成した梁材を能率良く安価に製造することができる。この梁材は、四角形状鋼管に形成しながらも、左右の薄肉鋼板部により、I型鋼(H型鋼)の形式に比べて使用材料の重量を重くすることなく、すなわち材料コストを上げることなく形成できる。しかも梁材は、コーナ部を熱間成形して四角形状鋼管に形成したことで、I型鋼(H型鋼)の形式に比べて曲げモーメント値を上げることができ、以て所定(規格)の強度などを十分に確保できる。   According to claim 1 of the present invention described above, forming from a steel plate to a shaped steel plate can be performed in a flow work by hot forming by a roll forming means while conveying the heated steel plate in the length direction. The beam material formed on the square steel pipe can be efficiently and inexpensively manufactured by welding the pair of shaped steel plates. This beam is formed into a rectangular steel pipe, but the left and right thin steel plate sections are formed without increasing the weight of the material used, that is, without increasing the material cost, compared to the type of I-shaped steel (H-shaped steel). it can. In addition, the beam material is formed into a rectangular steel pipe by hot forming the corner, so that the bending moment value can be increased as compared to the type of I-shaped steel (H-shaped steel), and therefore the strength of a predetermined (standard) Etc. can be secured sufficiently.

また上記した本発明の請求項2によると、加熱した鋼板を長さ方向に搬送しながらロール式成形手段により熱間成形することで、鋼板からU字型状鋼板への成形を流れ作業的に行うことができ、そして1対のU字型状鋼板における厚肉鋼板部の遊端間を溶接結合することで、四角形状鋼管に形成した梁材を製造することができる。この梁材は、四角形状鋼管に形成しながらも、左右の薄肉鋼板部により、I型鋼(H型鋼)の形式に比べて使用材料の重量を重くすることなく、すなわち材料コストを上げることなく形成できる。しかも梁材は、4箇所のコーナ部を熱間成形して四角形状鋼管に形成したことで、I型鋼(H型鋼)の形式に比べて曲げモーメント値を上げることができ、以て所定(規格)の強度などを十分に確保できる。   According to the second aspect of the present invention described above, the hot forming of the steel sheet from the steel sheet to the U-shaped steel sheet is carried out by hot forming by the roll forming means while conveying the heated steel sheet in the length direction. The beam material formed in the square steel pipe can be manufactured by welding the free ends of the thick steel plate portions in the pair of U-shaped steel plates. This beam is formed into a rectangular steel pipe, but the left and right thin steel plate sections are formed without increasing the weight of the material used, that is, without increasing the material cost, compared to the type of I-shaped steel (H-shaped steel). it can. Moreover, the beam material is formed into a rectangular steel pipe by hot forming the four corners, so that the bending moment value can be increased compared to the type of I-shaped steel (H-shaped steel). ) Can be sufficiently secured.

そして上記した本発明の請求項3によると、加熱した鋼板を長さ方向に搬送しながらロール式成形手段により熱間成形することで、鋼板からU字型状鋼板への成形を流れ作業的に行うことができ、そして1対のU字型状鋼板における薄肉鋼板部の遊端間を溶接結合することで、四角形状鋼管に形成した梁材を製造することができる。この梁材は、四角形状鋼管に形成しながらも、左右の薄肉鋼板部により、I型鋼(H型鋼)の形式に比べて使用材料の重量を重くすることなく、すなわち材料コストを上げることなく形成できる。しかも梁材は、4箇所のコーナ部を熱間成形して四角形状鋼管に形成したことで、I型鋼(H型鋼)の形式に比べて曲げモーメント値を上げることができ、以て所定(規格)の強度などを十分に確保できる。   And according to Claim 3 of the above-mentioned this invention, forming a steel plate from a steel plate to a U-shaped steel plate is flow-operated by carrying out hot forming with a roll-type forming means, conveying the heated steel plate to a length direction. The beam material formed in the square steel pipe can be manufactured by welding the free ends of the thin steel plate portions in the pair of U-shaped steel plates. This beam is formed into a rectangular steel pipe, but the left and right thin steel plate sections are formed without increasing the weight of the material used, that is, without increasing the material cost, compared to the type of I-shaped steel (H-shaped steel). it can. Moreover, the beam material is formed into a rectangular steel pipe by hot forming the four corners, so that the bending moment value can be increased compared to the type of I-shaped steel (H-shaped steel). ) Can be sufficiently secured.

さらに上記した本発明の請求項4によると、加熱した鋼板を長さ方向に搬送しながらロール式成形手段により熱間成形することで、鋼板からL字型状鋼板への成形を流れ作業的に行うことができ、そして1対のL字型状鋼板間を溶接結合することで、四角形状鋼管に形成した梁材を製造することができる。この梁材は、四角形状鋼管に形成しながらも、左右の薄肉鋼板部により、I型鋼(H型鋼)の形式に比べて使用材料の重量を重くすることなく、すなわち材料コストを上げることなく形成できる。しかも梁材は、2箇所のコーナ部を熱間成形して四角形状鋼管に形成したことで、I型鋼(H型鋼)の形式に比べて曲げモーメント値を上げることができ、以て所定(規格)の強度などを十分に確保できる。   Further, according to the fourth aspect of the present invention described above, the hot forming of the steel plate from the steel plate to the L-shaped steel plate is performed by hot forming by the roll forming means while conveying the heated steel plate in the length direction. The beam material formed in the square steel pipe can be manufactured by welding the pair of L-shaped steel plates. This beam is formed into a rectangular steel pipe, but the left and right thin steel plate sections are formed without increasing the weight of the material used, that is, without increasing the material cost, compared to the type of I-shaped steel (H-shaped steel). it can. Moreover, the beam material can be formed into a rectangular steel pipe by hot-forming two corners, so that the bending moment value can be increased compared to the type of I-shaped steel (H-shaped steel). ) Can be sufficiently secured.

しかも上記した本発明の請求項5によると、当てロールと受けロールとにより一方の鋼板部を上下から挟持した状態で、規制ロールにより外面を規制した他方の鋼板部に対して、押しロールにより押し下げ力を作用させることによって、型状鋼板の熱間成形を安定して精度よく行うことができる。   In addition, according to the fifth aspect of the present invention described above, the one steel plate portion is sandwiched from above and below by the contact roll and the receiving roll, and the other steel plate portion whose outer surface is regulated by the regulating roll is pushed down by the pushing roll. By applying the force, hot forming of the shaped steel sheet can be performed stably and accurately.

また上記した本発明の請求項6によると、上下方向で長い長方形状の四角形状鋼管に形成できることで、曲げモーメント値をより一層上げた梁材を製造できる。 Further, according to claim 6 of the present invention described above, the ability to form long rectangular quadrilateral steel pipe in the vertical direction, Ru can be produced even more increased Beam material a moment value bending.

[実施の形態1]
以下に、本発明の実施の形態1を、図1〜図8に基づいて説明する。
図1に示すように、鋼板1は、所定幅1Vでかつ所定長さLとされている。ここで鋼板1は、幅方向において中央部分(所定部分)が薄肉鋼板部2で両側部分が短尺の厚肉鋼板部3Aとして形成されている。その際に、両薄肉鋼板部2の板厚tの加算値2tに対して、厚肉鋼板部3Aの板厚Tが等厚状[2t≒T]もしくは厚く[2t<T]形成されている。また所定幅1Vは、所定形状の梁材を得るに相当する長さ、すなわち、薄肉鋼板部2の幅1Vに対して厚肉鋼板部3Aの幅1Vは短く(詳細は後述する。)設定されている。
[Embodiment 1]
Below, Embodiment 1 of this invention is demonstrated based on FIGS.
As shown in FIG. 1, the steel sheet 1 has a predetermined width 1V and a predetermined length L. Here, the steel plate 1 is formed as a thick steel plate portion 3A in which the central portion (predetermined portion) in the width direction is a thin steel plate portion 2 and both side portions are short. At that time, the thickness T of the thick steel plate portion 3A is formed to be equal [2t≈T] or thick [2t <T] with respect to the added value 2t of the thickness t of both thin steel plate portions 2. . The predetermined width 1V has a length corresponding to obtain a beam member having a predetermined shape, i.e., width 1V 2 of the thick steel plate portion 3A of the width 1V 1 of the thin steel plate portion 2 is short (details will be described later.) Is set.

図2に示すように、前記鋼板1を長さ方向に搬送する搬送経路10中には、上手から下手へと順に、トリミング開先加工機15と、加熱手段16と、熱間成形部20と、放冷部38と、溶接手段39とが設けられている。そして熱間成形部20には、3段(複数段)のロール式成形手段21,26,31が配設されている。   As shown in FIG. 2, in the conveyance path 10 for conveying the steel sheet 1 in the length direction, the trimming groove processing machine 15, the heating means 16, and the hot forming unit 20 are sequentially arranged from the upper side to the lower side. The cooling unit 38 and the welding means 39 are provided. The hot forming section 20 is provided with three-stage (multiple-stage) roll-type forming means 21, 26, 31.

前記鋼板1を搬送経路10上で長さ方向に搬送しながら、すなわち図3の(a)に示すように、ローラコンベア11により支持しかつ左右の幅決めロール12群により幅決めをして搬送経路10上で搬送しながら、まずトリミング開先加工機15に通して、幅方向における両側縁、すなわち短尺の厚肉鋼板部3Aの外側縁に開先4を加工する。次いで鋼板1を、たとえば加熱炉に入れての燃焼加熱方式からなる加熱手段16に通して、所定温度の一例であるA変態点(たとえば850〜1050℃)、またはその近辺(前後)にまで全体加熱する。そして加熱した鋼板1を長さ方向に搬送しながら熱間成形部20に通し、ロール式成形手段21,26,31群により熱間成形する。 While the steel plate 1 is conveyed in the length direction on the conveying path 10, that is, as shown in FIG. 3 (a), it is supported by the roller conveyor 11 and is determined by the left and right width determining rolls 12 and conveyed. While being conveyed on the path 10, the groove 4 is first passed through a trimming groove processing machine 15 to process the groove 4 on both side edges in the width direction, that is, the outer edge of the short thick steel plate portion 3 </ b> A. The Then the steel plate 1, for example through a heating unit 16 consisting of a combustion heating type of placed in a heating furnace, A 3 transformation point, which is an example of a predetermined temperature (e.g. 850-1050 ° C.), or to its vicinity (before and after) Heat the whole. The heated steel sheet 1 is passed through the hot forming section 20 while being conveyed in the length direction, and hot formed by the roll forming means 21, 26, 31 group.

すなわち図3(b)に示すように、最始段(1段目)のロール式成形手段21においては、下位の直状の受けロール22と上位の直状の押しロール23とにより薄肉鋼板部2を上下から挟持するとともに、左右一対の直状の規制ロール24により短尺の両厚肉鋼板部3Aを下側から受け止め規制して熱間成形する。ここで、最始段のロール式成形手段21において規制ロール24は、搬送経路10の方向で複数配設され、その上手側の水平状態から下手側へと次第に傾斜角度を鋭角に変化させることで熱間成形するものであり、図3(b)は出口部分が示されている。   That is, as shown in FIG. 3B, in the roll forming means 21 at the first stage (first stage), a thin steel plate portion is formed by a lower straight receiving roll 22 and an upper straight push roll 23. 2 is sandwiched from above and below, and a pair of right and left straight regulating rolls 24 is used to receive and regulate the short both thick steel plate portions 3A from the lower side and hot forming. Here, a plurality of regulating rolls 24 are arranged in the direction of the transport path 10 in the roll-type forming means 21 in the first stage, and the inclination angle is gradually changed to an acute angle from the horizontal state on the upper side to the lower side. The hot forming is performed, and FIG. 3B shows an outlet portion.

次いで2段目のロール式成形手段26においては、図4(a)に示すように、下位の直状の受けロール27と上位の直状の押しロール28とにより薄肉鋼板部2を上下から挟持するとともに、左右一対の直状の規制ロール29により短尺の両厚肉鋼板部3Aを下側から受け止め規制して熱間成形する。この2段目のロール式成形手段26においても最始段のロール式成形手段21と同様に、規制ロール29は搬送経路10の方向で複数配設され、その上手側から下手側へと次第に傾斜角度を鋭角に変化させることで熱間成形するものであり、図4(a)は出口部分が示されている。   Next, in the second-stage roll-type forming means 26, as shown in FIG. 4 (a), the thin steel plate portion 2 is sandwiched from above and below by the lower straight receiving roll 27 and the upper straight push roll 28. At the same time, the pair of right and left straight regulating rolls 29 receive and regulate the two short thick steel plate portions 3A from the lower side and hot form them. In the second-stage roll-type forming means 26, similarly to the first-stage roll-type forming means 21, a plurality of regulating rolls 29 are arranged in the direction of the conveyance path 10, and gradually incline from the upper side to the lower side. Hot forming is performed by changing the angle to an acute angle, and FIG. 4A shows the exit portion.

そして図4(b)に示すように、最終段(3段目)のロール式成形手段31において、幅方向の中央部に薄肉鋼板部2が位置し、かつ薄肉鋼板部2の両端にコーナ部5を介して短尺の厚肉鋼板部3Aが直角状に位置するU字型状鋼板(型状鋼板の一例)6として熱間成形する。その際に最終段のロール式成形手段31においては、下位の直状の受けロール32と中間位の直状の当てロール33とにより薄肉鋼板部2を上下から挟持するとともに、上位の左右一対で直状の押しロール34を両厚肉鋼板部3Aの遊端に上方から当接させて押し下げ力Pを作用させ、さらに両厚肉鋼板部3Aの外面に上下方向向きで直状の規制ロール35を当接させた状態で熱間成形している。すなわち、受けロール32と当てロール33とにより薄肉鋼板部2を上下から挟持した状態で、規制ロール35により外面を規制した短尺の厚肉鋼板部3Aに対して、押しロール34により押し下げ力Pを作用させることで、U字型状鋼板6の熱間成形を安定して精度よく行える。   4B, in the roll forming means 31 in the final stage (third stage), the thin steel plate part 2 is positioned at the center in the width direction, and the corner parts are provided at both ends of the thin steel plate part 2. 5 is hot-formed as a U-shaped steel plate (an example of a shaped steel plate) 6 in which a short thick steel plate portion 3A is positioned at a right angle. At that time, in the roll type forming means 31 at the final stage, the thin steel plate portion 2 is sandwiched from above and below by the lower straight receiving roll 32 and the intermediate direct hitting roll 33, and the upper left and right pair A straight push roll 34 is brought into contact with the free ends of both thick steel plate portions 3A from above to apply a push-down force P, and further, a straight regulating roll 35 in the vertical direction on the outer surface of both thick steel plate portions 3A. Is hot-formed in a state in which they are in contact with each other. In other words, in a state where the thin steel plate portion 2 is sandwiched from above and below by the receiving roll 32 and the contact roll 33, a pressing force P is applied to the short thick steel plate portion 3 </ b> A whose outer surface is regulated by the regulating roll 35. By acting, hot forming of the U-shaped steel plate 6 can be performed stably and accurately.

以上のように、加熱されて熱間成形部20に搬入された鋼板1は、ロール式成形手段21,26,31群によって折り曲げ状に熱間成形され、このとき熱間成形は、複数段のロール式成形手段21,26,31によって徐々(段階的)に曲げ状に行われる。すなわち、鋼板1を長さ方向に搬送しながら複数段のロール式成形手段21,26,31により熱間成形することで、鋼板1からU字型状鋼板6への熱間成形を流れ作業的に行えることになる。   As described above, the heated steel sheet 1 carried into the hot forming section 20 is hot-formed into a bent shape by the roll-type forming means 21, 26, 31 group. At this time, the hot forming is performed in a plurality of stages. The roll type forming means 21, 26, 31 are gradually (stepwise) bent. That is, hot forming from the steel plate 1 to the U-shaped steel plate 6 is performed by hot forming by the multi-stage roll forming means 21, 26, 31 while conveying the steel plate 1 in the length direction. Will be able to do it.

このようにして熱間成形されたU字型状鋼板6は、図2に示すように、放冷部(冷却床)38に受け取られる。この放冷部38は、たとえばローラコンベヤ形式であって、U字型状鋼板6を搬送しながら放冷し、以て常温状(大気温度、若しくは大気温度よりも少し高い温度)とする。これによりU字型状鋼板6は、同じ雰囲気温度下で徐冷されることになり、以て冷却時の曲がりを少なくし得る。なお搬送中に、U字型状鋼板6を空冷形式で徐冷してもよい。   As shown in FIG. 2, the hot-formed U-shaped steel plate 6 is received by a cooling section (cooling floor) 38 as shown in FIG. 2. The cooling unit 38 is, for example, in the form of a roller conveyor, and cools while conveying the U-shaped steel plate 6 so as to have a room temperature (atmospheric temperature or a temperature slightly higher than the atmospheric temperature). As a result, the U-shaped steel plate 6 is gradually cooled under the same atmospheric temperature, so that bending during cooling can be reduced. During conveyance, the U-shaped steel plate 6 may be gradually cooled in an air cooling format.

図5に示すように熱間成形されたU字型状鋼板6は、開先4に対してブラッシングなどを行ってミルスケールの除去などを行う。そして常温状とした1対のU字型状鋼板6を、短尺の厚肉鋼板部3Aの遊端を相対向させた状態で溶接手段39に搬入し、開先4を利用して溶接結合7することで、図6に示すように四角形状鋼管に形成され、以て製品としての梁材8を製造し得る。なお製作された梁材8は、必要に応じて、図示していない矯正装置、先端切断装置、後端切断装置、洗浄装置、防錆装置へと搬送され、それぞれで処理されたのち、製品としてストレージされる。   As shown in FIG. 5, the hot-formed U-shaped steel plate 6 performs brushing or the like on the groove 4 to remove the mill scale. Then, a pair of U-shaped steel plates 6 having a normal temperature are carried into the welding means 39 with the free ends of the short thick steel plate portions 3A facing each other, and welded joints 7 using the grooves 4 are used. By doing so, as shown in FIG. 6, it forms in a square-shaped steel pipe, Therefore The beam material 8 as a product can be manufactured. In addition, the manufactured beam material 8 is conveyed to a correction device, a front end cutting device, a rear end cutting device, a cleaning device, and a rust prevention device (not shown) as necessary, and is processed as a product. It is stored.

すなわち梁材8は、4箇所のコーナ部5を熱間成形により直角状(外面R状の曲率半径)に曲げ成形して、上下一対の厚肉鋼板部(フランジ部に相当)3と、左右一対の薄肉鋼板部(ウエブ部に相当)2とからなる四角形状鋼管に形成される。その際に梁材8は、前述したように両薄肉鋼板部2の板厚tの加算値2tに対して、厚肉鋼板部3の板厚Tが等厚状[2t≒T]もしくは厚く[2t<T]形成されている。そして梁材8は、両薄肉鋼板部2の外面間の幅外寸Wよりも、両厚肉鋼板部3の外面間の高さ外寸Hが長く[W<H]形成され、以て長方形状の四角形状鋼管に形成されている。   That is, the beam member 8 is formed by bending four corner portions 5 into a right angle (outer surface R-shaped radius of curvature) by hot forming, and a pair of upper and lower thick steel plate portions (corresponding to flange portions) 3 and left and right It is formed in a rectangular steel pipe comprising a pair of thin steel plate portions (corresponding to web portions) 2. At that time, as described above, the thickness 8 of the thick steel plate 3 is equal to [2t≈T] or thicker than the added value 2t of the thickness t of the two thin steel plates 2. 2t <T] is formed. The beam member 8 is formed to have a height outer dimension H [W <H] between the outer surfaces of both thick steel plate parts 3 longer than the outer width W between the outer surfaces of both thin steel plate parts 2, and is thus rectangular. Formed into a rectangular steel pipe.

ここで梁材8としては、たとえば、薄肉鋼板部2の板厚tが6mm、厚肉鋼板部3の板厚Tが22mm、両薄肉鋼板部2の外面間の幅外寸Wが250mm、両厚肉鋼板部3の外面間の高さ外寸Hが600mmに形成されている。これにより、両薄肉鋼板部2の板厚tの加算値2tである12mmに対して、厚肉鋼板部3の板厚Tが22mmと厚く形成され、そして幅外寸Wの250mmよりも、高さ外寸Hの600mmが長く形成されることになる。   Here, as the beam member 8, for example, the thickness t of the thin steel plate portion 2 is 6 mm, the thickness T of the thick steel plate portion 3 is 22 mm, the outer width W between the outer surfaces of the two thin steel plate portions 2 is 250 mm, The height dimension H between the outer surfaces of the thick steel plate portion 3 is 600 mm. Thereby, the thickness T of the thick steel plate portion 3 is formed as thick as 22 mm with respect to 12 mm which is the added value 2t of the thickness t of both thin steel plate portions 2, and is higher than the outer width W of 250 mm. The outer dimension H of 600 mm is formed long.

したがって梁材8は、左右一対の薄肉鋼板部2を有する四角形状鋼管に形成されていながらも、両薄肉鋼板部2の板厚tを薄く形成したことにより、I型鋼(H型鋼)の形式に比べて使用材料の重量を重くすることなく、すなわち材料コストを上げることなく形成し得る。しかも梁材8は、4箇所のコーナ部5を熱間成形して四角形状鋼管に形成されていることで、I型鋼(H型鋼)の形式に比べて曲げモーメント値を上げ得、以て所定(規格)の強度などを十分に確保し得る。   Therefore, the beam member 8 is formed into a rectangular steel pipe having a pair of left and right thin steel plate portions 2, but the thickness t of both thin steel plate portions 2 is reduced to form I-shaped steel (H-shaped steel). It can be formed without increasing the weight of the material used, that is, without increasing the material cost. Moreover, the beam material 8 is formed into a rectangular steel pipe by hot forming the four corner portions 5, so that the bending moment value can be increased as compared with the type of I-shaped steel (H-shaped steel). Sufficient strength of (standard) can be secured.

このようにして得られた梁材8は鉄骨構造物の一部として使用される。すなわち図7、図8に示すように、鉄骨構造物40は、鋼管柱41と、この鋼管柱41の梁材連結部(パネルゾーン)に連結した梁材8などで構成される。そして鋼管柱41は、長尺角形鋼管(長尺の支柱)42と、短尺の梁材連結用角形鋼管(梁材連結部)43とによって構成され、以て鋼管柱41は、その長さ方向において長尺角形鋼管42群と梁材連結用角形鋼管43群とに切断(分断)されている。   The beam member 8 obtained in this way is used as a part of the steel structure. That is, as shown in FIGS. 7 and 8, the steel structure 40 includes a steel pipe column 41 and a beam member 8 connected to a beam member connecting portion (panel zone) of the steel tube column 41. The steel pipe column 41 is constituted by a long square steel pipe (long column) 42 and a short beam steel connecting rectangular steel pipe (beam material connecting portion) 43, and the steel pipe column 41 has a length direction. Are cut (divided) into a group of long rectangular steel pipes 42 and a group of rectangular steel pipes 43 for connecting beam members.

そして下部の長尺角形鋼管42の上端に、梁材連結用角形鋼管43の下端が突き合せ方式により溶接結合44aされるとともに、梁材連結用角形鋼管43の上端に、上部の長尺角形鋼管42の下端が溶接結合44aされる。なお、溶接結合44aを行う際に、長尺角形鋼管42の内面側に裏当て材45aが介在される。このようにして形成された鋼管柱41に対する梁材8の連結は、この梁材8の遊端を梁材連結用角形鋼管43に対して溶接結合44bすることで行われ、この溶接結合44bを行う際にも裏当て材45bが介在される。   The lower end of the lower rectangular steel pipe 43 is welded 44a to the lower end of the beam-connecting rectangular steel pipe 43 by a butting method, and the upper long rectangular steel pipe 43 is connected to the upper end of the beam-connecting rectangular steel pipe 43. The lower end of 42 is weld-bonded 44a. When performing the welding connection 44a, the backing material 45a is interposed on the inner surface side of the long rectangular steel pipe 42. The connection of the beam member 8 to the steel pipe column 41 formed in this way is performed by welding the free end of the beam member 8 to the beam-connecting rectangular steel pipe 43 to be welded 44b. The backing material 45b is interposed also when performing.

また梁材8の遊端間の連結、すなわち長さ方向での連結は、長さ方向で隣接した薄肉鋼板部2の外面間に亘って鋼板状のブラケット46を当接させ、そしてブラケット46から薄肉鋼板部2に亘って連結具47を結合作用させることで行える。なお、連結具47による結合は、ブラケット46から薄肉鋼板部2に亘って形成された貫通孔間に通したのち操作することで内端部分が拡径されるアンカー式ボルト、小径の貫通孔間にねじ込まれる螺合式ボルト、リベットなどが採用される。   Further, the connection between the free ends of the beam member 8, that is, the connection in the length direction, is caused by bringing the steel plate-like bracket 46 into contact with the outer surface of the thin steel plate portion 2 adjacent in the length direction, and from the bracket 46. This can be done by coupling the connector 47 across the thin steel plate portion 2. In addition, the coupling | bonding by the connector 47 passes between the through-holes formed from the bracket 46 to the thin-walled steel plate part 2, and it operates between the anchor type volt | bolt in which an inner end part is diameter-expanded, and a small diameter through-hole between Threaded bolts, rivets and the like that are screwed into are used.

このように構成された鉄骨構造物40は、4箇所のコーナ部5を熱間成形して四角形状鋼管に形成された梁材8が使用されていることで、I型鋼(H型鋼)の梁材が使用された形式に比べて、使用材料の重量を重くすることなく、すなわち材料コストを上げることなく構成し得るとともに、曲げモーメント値を上げ得て所定(規格)の強度などを十分に確保し得、さらに横揺れを少なくした構成とし得る。さらに梁材8が、上下方向で長い長方形状の四角形状鋼管に形成されていることで、曲げモーメント値をより一層上げ得る。なお、四角形状鋼管に形成された梁材8の内部空間を利用して、コンクリートや鉄筋コンクリートを充填させることで、強度などをより一層向上し得る。   The steel structure 40 configured as described above is a beam of I-shaped steel (H-shaped steel) by using the beam material 8 formed into a rectangular steel pipe by hot forming the four corner portions 5. Compared to the type in which the material is used, it can be configured without increasing the weight of the material used, that is, without increasing the material cost, and the bending moment value can be increased to sufficiently secure the specified (standard) strength. In addition, a configuration with less roll can be obtained. Furthermore, since the beam member 8 is formed in a rectangular quadrangular steel pipe that is long in the vertical direction, the bending moment value can be further increased. In addition, strength etc. can be further improved by filling concrete or reinforced concrete using the internal space of the beam 8 formed in the rectangular steel pipe.

また4箇所のコーナ部5を熱間成形した梁材8は、残留応力の除去と靭性の回復とを図り、捩れ、曲がり、変形が殆ど生じない均質なものにし得るとともに、この梁材8は能率よく安価に得られ、以て鉄骨構造物40を大幅なコストダウンで構成し得ることになる。なお、鋼管柱41を構成する長尺角形鋼管42と梁材連結用角形鋼管43としては、両方とも熱間成形鋼管を使用した形式、両方とも冷間成形鋼管を使用した形式、いずれか一方を熱間成形鋼管とし、他方を冷間成形鋼管とした形式であってもよい。
[実施の形態2]
次に、本発明の実施の形態2を、図9〜図12に基づいて説明する。
Further, the beam material 8 obtained by hot-forming the four corner portions 5 can remove residual stress and restore toughness, and can be made to be homogeneous with almost no twisting, bending, or deformation. It can be obtained efficiently and inexpensively, and thus the steel structure 40 can be constructed at a significant cost reduction. In addition, as the long square steel pipe 42 and the beam steel connecting square steel pipe 43 constituting the steel pipe column 41, both of the types using a hot-formed steel pipe, both the types using a cold-formed steel pipe, either A hot-formed steel pipe may be used, and the other may be a cold-formed steel pipe.
[Embodiment 2]
Next, a second embodiment of the present invention will be described with reference to FIGS.

図9(a)に示すように、鋼板51は、所定幅51Vでかつ所定長さLとされている。ここで鋼板51は、幅方向において両側部分が(所定部分)が短尺の薄肉鋼板部52Aで中央部分が厚肉鋼板部53として形成されている。その際に、両薄肉鋼板部52Aの板厚tの加算値2tに対して、厚肉鋼板部53の板厚Tが等厚状[2t≒T]もしくは厚く[2t<T]形成されている。また所定幅51Vは、所定形状の梁材を得るに相当する長さ、すなわち、薄肉鋼板部52Aの幅51Vと厚肉鋼板部53の幅51Vとは同様に(詳細は後述する。)設定されている。 As shown in FIG. 9A, the steel plate 51 has a predetermined width 51V and a predetermined length L. Here, the steel plate 51 is formed as a thin steel plate portion 52 </ b> A in which both side portions (predetermined portions) are short in the width direction and a thick steel plate portion 53 in the center portion. At this time, the thickness T of the thick steel plate portion 53 is formed to be equal [2t≈T] or thick [2t <T] with respect to the added value 2t of the thickness t of both the thin steel plate portions 52A. . The predetermined width 51V has a length corresponding to obtain a beam member having a predetermined shape, i.e., as the width 51V 2 width 51V 1 and the thick steel plate portion 53 of the thin steel plate portion 52A (details will be described later.) Is set.

前記鋼板51を搬送経路10上で長さ方向に搬送しながら、まずトリミング開先加工機15に通して、幅方向における両側縁、すなわち短尺の薄肉鋼板部52Aの外側縁に開先54を加工する。次いで鋼板51を加熱手段16に通して、所定温度の一例であるA変態点(たとえば850〜1050℃)、またはその近辺(前後)にまで全体加熱する。そして加熱した鋼板51を長さ方向に搬送しながら熱間成形部60に通し、ロール式成形手段61,66,71群により熱間成形する。 While conveying the steel plate 51 in the length direction on the conveyance path 10, first, it passes through the trimming groove processing machine 15, and processes the groove 54 on both side edges in the width direction, that is, the outer edge of the short thin steel plate portion 52A. To do. Then through the steel plate 51 to the heating unit 16, A 3 transformation point, which is an example of a predetermined temperature (e.g. 850-1050 ° C.), or heated overall to the vicinity (so) that. Then, the heated steel plate 51 is passed through the hot forming section 60 while being conveyed in the length direction, and hot formed by the roll forming means 61, 66, 71 group.

すなわち図9(b)に示すように、最始段(1段目)のロール式成形手段61においては、下位の直状の受けロール62と上位の直状の押しロール63とにより厚肉鋼板部53を上下から挟持するとともに、左右一対の直状の規制ロール64により短尺の両薄肉鋼板部52を下側から受け止め規制して熱間成形する。ここで、最始段のロール式成形手段61において規制ロール64は、搬送経路の方向で複数配設され、その上手側の水平状態から下手側へと次第に傾斜角度を鋭角に変化させることで熱間成形するものであり、図9(b)は出口部分が示されている。   That is, as shown in FIG. 9B, in the roll forming means 61 at the first stage (first stage), a thick steel plate is formed by a lower straight receiving roll 62 and an upper straight push roll 63. While sandwiching the portion 53 from above and below, the pair of right and left straight regulating rolls 64 receives and regulates the two thin steel plate portions 52 from the lower side and hot forms them. Here, a plurality of regulating rolls 64 are arranged in the direction of the transport path in the roll forming means 61 in the first stage, and the heat is generated by gradually changing the inclination angle from the horizontal state on the upper side to the lower side. In FIG. 9B, the exit portion is shown.

次いで2段目のロール式成形手段66においては、図10(a)に示すように、下位の直状の受けロール67と上位の直状の押しロール68とにより厚肉鋼板部53を上下から挟持するとともに、左右一対の直状の規制ロール69により短尺の両薄肉鋼板部52Aを下側から受け止め規制して熱間成形する。この2段目のロール式成形手段66においても最始段のロール式成形手段61と同様に、規制ロール69は搬送経路の方向で複数配設され、その上手側から下手側へと次第に傾斜角度を鋭角に変化させることで熱間成形するものであり、図10(a)は出口部分が示されている。   Next, in the second roll-type forming means 66, as shown in FIG. 10 (a), the thick steel plate portion 53 is moved from above and below by the lower straight receiving roll 67 and the upper straight push roll 68. While sandwiched, the pair of right and left straight regulating rolls 69 receive and regulate the short thin steel plate portions 52A from the lower side and perform hot forming. In the second-stage roll-type forming means 66 as well, as with the first-stage roll-type forming means 61, a plurality of regulating rolls 69 are arranged in the direction of the transport path, and the inclination angle gradually increases from the upper side to the lower side. Is changed to an acute angle, and hot forming is performed. FIG. 10A shows an exit portion.

そして図10(b)に示すように、最終段(3段目)のロール式成形手段71において、幅方向の中央部に厚肉鋼板部53が位置し、かつ厚肉鋼板部53の両端にコーナ部55を介して短尺の薄肉鋼板部52Aが直角状に位置するU字型状鋼板(型状鋼板の一例)56として熱間成形する。その際に最終段のロール式成形手段71においては、下位の直状の受けロール72と中間位の直状の当てロール73とにより厚肉鋼板部53を上下から挟持するとともに、上位の左右一対で直状の押しロール74を両薄肉鋼板部52Aの遊端に上方から当接させて押し下げ力Pを作用させ、さらに両薄肉鋼板部52Aの外面に上下方向向きで直状の規制ロール75を当接させた状態で熱間成形している。すなわち、受けロール72と当てロール73とにより厚肉鋼板部53を上下から挟持した状態で、規制ロール75により外面を規制した短尺の薄肉鋼板部52Aに対して、押しロール74により押し下げ力Pを作用させることで、U字型状鋼板56の熱間成形を安定して精度よく行える。   Then, as shown in FIG. 10B, in the roll-type forming means 71 in the final stage (third stage), the thick steel plate part 53 is located at the center in the width direction, and at both ends of the thick steel plate part 53. Hot forming is performed as a U-shaped steel plate (an example of a shaped steel plate) 56 in which a short thin steel plate portion 52A is positioned at a right angle via a corner portion 55. At that time, in the roll forming means 71 at the final stage, the thick steel plate 53 is sandwiched from above and below by the lower straight receiving roll 72 and the intermediate straight hitting roll 73, and the upper left and right pair Then, the straight pushing roll 74 is brought into contact with the free ends of the both thin steel plate portions 52A from above to apply a pressing force P, and further, the straight regulating roll 75 is vertically oriented on the outer surface of the both thin steel plate portions 52A. Hot forming is performed in a contact state. That is, with the receiving roll 72 and the contact roll 73 sandwiching the thick steel plate portion 53 from above and below, a pressing force P is applied to the short thin steel plate portion 52A whose outer surface is regulated by the regulating roll 75. By making it act, hot forming of the U-shaped steel plate 56 can be performed stably and accurately.

以上のように、加熱されて熱間成形部60に搬入された鋼板51は、ロール式成形手段61,66,71群によって折り曲げ状に熱間成形され、このとき熱間成形は、複数段のロール式成形手段61,66,71によって徐々(段階的)に曲げ状に行われる。すなわち、鋼板51を長さ方向に搬送しながら複数段のロール式成形手段61,66,71により熱間成形することで、鋼板51からU字型状鋼板56への熱間成形を流れ作業的に行えることになる。   As described above, the steel plate 51 that has been heated and carried into the hot forming section 60 is hot-formed into a bent shape by the roll-type forming means 61, 66, and 71, and at this time, hot forming is performed in a plurality of stages. The roll type forming means 61, 66, 71 are gradually (stepwise) bent. That is, the hot forming from the steel plate 51 to the U-shaped steel plate 56 is performed by hot forming by the multi-stage roll forming means 61, 66, 71 while conveying the steel plate 51 in the length direction. Will be able to do it.

そして熱間成形されたU字型状鋼板56を、放冷部で搬送しながら放冷し、以て常温状(大気温度、若しくは大気温度よりも少し高い温度)とする。これによりU字型状鋼板56は、同じ雰囲気温度下で徐冷されることになり、以て冷却時の曲がりを少なくし得る。なお搬送中に、U字型状鋼板56を空冷形式で徐冷してもよい。   Then, the hot-formed U-shaped steel plate 56 is allowed to cool while being conveyed in the cooler, so that it is in a room temperature state (atmospheric temperature or a temperature slightly higher than the atmospheric temperature). As a result, the U-shaped steel plate 56 is gradually cooled under the same atmospheric temperature, so that bending during cooling can be reduced. During conveyance, the U-shaped steel plate 56 may be gradually cooled in an air cooling format.

図11に示すように熱間成形されたU字型状鋼板56は、開先54に対してブラッシングなどを行ってミルスケールの除去などを行う。そして常温状とした1対のU字型状鋼板56を、短尺の薄肉鋼板部52Aの遊端を相対向させた状態で溶接手段39に搬入し、開先54を利用して溶接結合57することで、図12に示すように四角形状鋼管に形成され、以て製品としての梁材58を製造し得る。   As shown in FIG. 11, the hot-formed U-shaped steel plate 56 performs brushing or the like on the groove 54 to remove the mill scale. Then, a pair of U-shaped steel plates 56 brought to room temperature are carried into the welding means 39 with the free ends of the short thin steel plate portions 52A facing each other, and welded and joined 57 using the groove 54. Thus, as shown in FIG. 12, it is formed into a rectangular steel pipe, and thus the beam material 58 as a product can be manufactured.

すなわち梁材58は、4箇所のコーナ部55を熱間成形により直角状(外面R状の曲率半径)に曲げ成形して、上下一対の厚肉鋼板部(フランジ部に相当)53と、左右一対の薄肉鋼板部(ウエブ部に相当)52とからなる四角形状鋼管に形成される。その際に梁材58は、前述したように両薄肉鋼板部52の板厚tの加算値2tに対して、厚肉鋼板部53の板厚Tが等厚状[2t≒T]もしくは厚く[2t<T]形成されている。そして梁材58は、両薄肉鋼板部52の外面間の幅外寸Wよりも、両厚肉鋼板部53の外面間の高さ外寸Hが長く[W<H]形成され、以て長方形状の四角形状鋼管に形成されている。   That is, the beam member 58 is formed by bending four corner portions 55 into a right angle (outer surface R-shaped radius of curvature) by hot forming, and a pair of upper and lower thick steel plate portions (corresponding to flange portions) 53 and left and right It is formed in a rectangular steel pipe comprising a pair of thin steel plate portions (corresponding to web portions) 52. At that time, as described above, in the beam member 58, the thickness T of the thick steel plate portion 53 is equal to [2t≈T] or thicker than the addition value 2t of the thickness t of the both thin steel plate portions 52 [2t≈T]. 2t <T] is formed. The beam member 58 is formed so that the height dimension H between the outer surfaces of the both thick steel plate parts 53 is longer than the width outer dimension W between the outer surfaces of the both thin steel plate parts 52, and is thus rectangular. Formed into a rectangular steel pipe.

ここで梁材58としては、たとえば、薄肉鋼板部52の板厚tが6mm、厚肉鋼板部53の板厚Tが22mm、両薄肉鋼板部52の外面間の幅外寸Wが250mm、両厚肉鋼板部53の外面間の高さ外寸Hが600mmに形成されている。これにより、両薄肉鋼板部52の板厚tの加算値2tである12mmに対して、厚肉鋼板部53の板厚Tが22mmと厚く形成され、そして幅外寸Wの250mmよりも、高さ外寸Hの600mmが長く形成されることになる。   Here, as the beam member 58, for example, the thickness t of the thin steel plate portion 52 is 6 mm, the thickness T of the thick steel plate portion 53 is 22 mm, the width outer dimension W between the outer surfaces of the two thin steel plate portions 52 is 250 mm, The height dimension H between the outer surfaces of the thick steel plate portion 53 is 600 mm. Accordingly, the thickness T of the thick steel plate portion 53 is formed to be as thick as 22 mm with respect to 12 mm which is the added value 2t of the thickness t of both the thin steel plate portions 52, and is higher than the outer width W of 250 mm. The outer dimension H of 600 mm is formed long.

したがって梁材58は、左右一対の薄肉鋼板部52を有する四角形状鋼管に形成されていながらも、両薄肉鋼板部52の板厚tを薄く形成したことにより、I型鋼(H型鋼)の形式に比べて使用材料の重量を重くすることなく、すなわち材料コストを上げることなく形成し得る。しかも梁材58は、4箇所のコーナ部55を熱間成形して四角形状鋼管に形成されていることで、I型鋼(H型鋼)の形式に比べて曲げモーメント値を上げ得、以て所定(規格)の強度などを十分に確保し得る。   Accordingly, the beam member 58 is formed into a square steel pipe having a pair of left and right thin steel plate portions 52, but the thin plate thickness t of both thin steel plate portions 52 is formed into a form of I-shaped steel (H-shaped steel). It can be formed without increasing the weight of the material used, that is, without increasing the material cost. Moreover, the beam member 58 is formed into a rectangular steel pipe by hot-forming the four corner portions 55, so that the bending moment value can be increased as compared with the type of I-shaped steel (H-shaped steel). Sufficient strength of (standard) can be secured.

このようにして得られた梁材58は、前述した実施の形態1と同様にして、鉄骨構造物の一部として使用される。その際に鉄骨構造物は、4箇所のコーナ部55を熱間成形して四角形状鋼管に形成された梁材58が使用されていることで、I型鋼(H型鋼)の梁材が使用された形式に比べて、使用材料の重量を重くすることなく、すなわち材料コストを上げることなく構成し得るとともに、曲げモーメント値を上げ得て所定(規格)の強度などを十分に確保し得、さらに横揺れを少なくした構成とし得る。さらに梁材58が、上下方向で長い長方形状の四角形状鋼管に形成されていることで、曲げモーメント値をより一層上げ得る。なお、四角形状鋼管に形成された梁材58の内部空間を利用して、コンクリートや鉄筋コンクリートを充填させることで、強度などをより一層向上し得る。   The beam material 58 thus obtained is used as a part of the steel structure in the same manner as in the first embodiment. At that time, the steel structure is made of I-shaped steel (H-shaped steel) by using the beam material 58 formed into a square steel pipe by hot forming four corner portions 55. Compared to other types, it can be constructed without increasing the weight of the material used, that is, without increasing the material cost, and the bending moment value can be increased to sufficiently secure the predetermined (standard) strength. A structure with less roll can be obtained. Furthermore, since the beam member 58 is formed in a rectangular rectangular steel pipe that is long in the vertical direction, the bending moment value can be further increased. Note that the strength and the like can be further improved by filling concrete or reinforced concrete using the internal space of the beam member 58 formed in the rectangular steel pipe.

また4箇所のコーナ部55を熱間成形した梁材58は、残留応力の除去と靭性の回復とを図り、捩れ、曲がり、変形が殆ど生じない均質なものにし得るとともに、この梁材58は能率よく安価に得られ、以て鉄骨構造物を大幅なコストダウンで構成し得ることになる。
[実施の形態3]
次に、本発明の実施の形態3を、図13〜図16に基づいて説明する。
In addition, the beam material 58 obtained by hot forming the four corner portions 55 can remove residual stress and restore toughness, and can be made to be homogeneous with almost no twisting, bending, or deformation. It can be obtained efficiently and inexpensively, so that the steel structure can be constructed at a significant cost reduction.
[Embodiment 3]
Next, a third embodiment of the present invention will be described with reference to FIGS.

図13(a)に示すように、鋼板81は、所定幅81Vでかつ所定長さLとされている。ここで鋼板81は、幅方向において一側部分が(所定部分)が薄肉鋼板部82で他側部分が厚肉鋼板部83として形成されている。その際に、薄肉鋼板部82の板厚tの加算値2tに対して、厚肉鋼板部83の板厚Tが等厚状[2t≒T]もしくは厚く[2t<T]形成されている。また所定幅81Vは、所定形状の梁材を得るに相当する長さ、すなわち、薄肉鋼板部82の幅81Vや厚肉鋼板部83の幅81Vは最終製品の長さに同等状(詳細は後述する。)に設定されている。 As shown in FIG. 13A, the steel plate 81 has a predetermined width 81V and a predetermined length L. Here, the steel plate 81 is formed such that one side portion (predetermined portion) in the width direction is a thin steel plate portion 82 and the other side portion is a thick steel plate portion 83. At this time, the thickness T of the thick steel plate 83 is formed to be equal [2t≈T] or thick [2t <T] with respect to the added value 2t of the thickness t of the thin steel plate 82. The predetermined width 81V has a length corresponding to obtain a beam member having a predetermined shape, i.e., width 81V 2 width 81V 1 or thick-walled steel plate portion 83 of the thin steel plate portion 82 equivalent shape to the length of the final product (Details Is set later).

前記鋼板81を搬送経路10上で長さ方向に搬送しながら、まずトリミング開先加工機15に通して、幅方向における両側縁、すなわち薄肉鋼板部82の外側縁と厚肉鋼板部83の外側縁とに開先84を加工する。次いで鋼板81を加熱手段16に通して、所定温度の一例であるA変態点(たとえば850〜1050℃)、またはその近辺(前後)にまで全体加熱する。そして加熱した鋼板81を長さ方向に搬送しながら熱間成形部90に通し、ロール式成形手段91,96,101群により熱間成形する。 While transporting the steel plate 81 in the length direction on the transport path 10, first, the steel plate 81 is passed through the trimming groove processing machine 15, and both side edges in the width direction, that is, the outer edge of the thin steel plate portion 82 and the outer side of the thick steel plate portion 83. The groove 84 is processed at the edge. Then through the steel plate 81 to the heating unit 16, A 3 transformation point, which is an example of a predetermined temperature (e.g. 850-1050 ° C.), or heated overall to the vicinity (so) that. Then, the heated steel plate 81 is passed through the hot forming section 90 while being conveyed in the length direction, and hot formed by the roll forming means 91, 96, 101 group.

すなわち図13(b)に示すように、最始段(1段目)のロール式成形手段91においては、下位の直状の受けロール92と上位の直状の押しロール93とにより薄肉鋼板部82を上下から挟持するとともに、直状の規制ロール94により厚肉鋼板部82を下側から受け止め規制して熱間成形する。ここで、最始段のロール式成形手段91において規制ロール94は、搬送経路の方向で複数配設され、その上手側の水平状態から下手側へと次第に傾斜角度を鋭角に変化させることで熱間成形するものであり、図13(b)は出口部分が示されている。   That is, as shown in FIG. 13B, in the roll forming means 91 in the first stage (first stage), the thin steel plate portion is composed of the lower straight receiving roll 92 and the upper straight push roll 93. While sandwiching 82 from above and below, the thick steel plate portion 82 is received and regulated from below by a straight regulation roll 94 and hot-formed. Here, a plurality of regulating rolls 94 are arranged in the direction of the conveying path in the roll-type forming means 91 at the first stage, and the heat is generated by gradually changing the inclination angle from the horizontal state on the upper side to the lower side. The outlet portion is shown in FIG. 13 (b).

次いで2段目のロール式成形手段96においては、図14(a)に示すように、下位の直状の受けロール97と上位の直状の押しロール98とにより薄肉鋼板部82を上下から挟持するとともに、直状の規制ロール99により厚肉鋼板部83を下側から受け止め規制して熱間成形する。この2段目のロール式成形手段96においても最始段のロール式成形手段91と同様に、規制ロール99は搬送経路の方向で複数配設され、その上手側から下手側へと次第に傾斜角度を鋭角に変化させることで熱間成形するものであり、図14(a)は出口部分が示されている。   Next, in the second-stage roll-type forming means 96, as shown in FIG. 14 (a), the thin steel plate portion 82 is sandwiched from above and below by the lower straight receiving roll 97 and the upper straight push roll 98. At the same time, the thick steel plate 83 is received and regulated from the lower side by the straight regulation roll 99 and hot-formed. In the second-stage roll-type forming means 96, similarly to the first-stage roll-type forming means 91, a plurality of restricting rolls 99 are arranged in the direction of the conveyance path, and the inclination angle gradually increases from the upper side to the lower side. Is changed to an acute angle, and hot forming is performed, and FIG. 14A shows an exit portion.

そして図14(b)に示すように、最終段(3段目)のロール式成形手段101において、薄肉鋼板部82と厚肉鋼板部83とが、コーナ部85を介して直角状に位置したL字型状鋼板(熱間成形物)86として熱間成形する。その際に最終段のロール式成形手段101においては、下位の直状の受けロール102と中間位の直状の当てロール103とにより薄肉鋼板部82を上下から挟持するとともに、上位の直状の押しロール104を厚肉鋼板部83の遊端に上方から当接させて押し下げ力Pを作用させ、さらに厚肉鋼板部83の外面に上下方向向きで直状の規制ロール105を当接させた状態で熱間成形している。すなわち、受けロール102と当てロール103とにより薄肉鋼板部82を上下から挟持した状態で、規制ロール105により外面を規制した厚肉鋼板部83に対して、押しロール104により押し下げ力Pを作用させることで、L字型状鋼板86の熱間成形を安定して精度よく行える。   Then, as shown in FIG. 14B, in the roll type forming means 101 at the final stage (third stage), the thin steel plate portion 82 and the thick steel plate portion 83 are positioned at right angles via the corner portion 85. Hot forming is performed as an L-shaped steel plate (hot formed product) 86. At that time, in the roll-type forming means 101 at the final stage, the thin steel plate portion 82 is sandwiched from above and below by the lower straight receiving roll 102 and the intermediate straight hitting roll 103, and the upper straight shape is formed. The push roll 104 is brought into contact with the free end of the thick steel plate portion 83 from above to apply a pressing force P, and the straight regulating roll 105 is brought into contact with the outer surface of the thick steel plate portion 83 in the vertical direction. Hot forming in the state. That is, with the receiving roll 102 and the contact roll 103 holding the thin steel plate portion 82 from above and below, the push roll 104 applies a pressing force P to the thick steel plate portion 83 whose outer surface is regulated by the regulating roll 105. Thus, the hot forming of the L-shaped steel plate 86 can be performed stably and accurately.

以上のように、加熱されて熱間成形部90に搬入された鋼板81は、ロール式成形手段91,96,101群によって折り曲げ状に熱間成形され、このとき熱間成形は、複数段のロール式成形手段91,96,101によって徐々(段階的)に曲げ状に行われる。すなわち、鋼板81を長さ方向に搬送しながら複数段のロール式成形手段91,96,101により熱間成形することで、鋼板81からL字型状鋼板86への熱間成形を流れ作業的に行えることになる。   As described above, the steel plate 81 that has been heated and carried into the hot forming section 90 is hot-formed into a bent shape by the roll-type forming means 91, 96, 101 group. At this time, the hot forming is performed in a plurality of stages. The roll forming means 91, 96, 101 are gradually bent in a stepwise manner. In other words, hot forming from the steel plate 81 to the L-shaped steel plate 86 is performed by hot forming by the multi-stage roll forming means 91, 96, 101 while conveying the steel plate 81 in the length direction. Will be able to do it.

そして熱間成形されたL字型状鋼板86を、放冷部で搬送しながら放冷し、以て常温状(大気温度、若しくは大気温度よりも少し高い温度)とする。これによりL字型状鋼板86は、同じ雰囲気温度下で徐冷されることになり、以て冷却時の曲がりを少なくし得る。なお搬送中に、L字型状鋼板86を空冷形式で徐冷してもよい。   Then, the hot-formed L-shaped steel plate 86 is allowed to cool while being conveyed in the cooler, and is thus brought to a normal temperature (atmospheric temperature or a temperature slightly higher than the atmospheric temperature). As a result, the L-shaped steel plate 86 is gradually cooled under the same atmospheric temperature, so that bending during cooling can be reduced. During conveyance, the L-shaped steel plate 86 may be gradually cooled in an air-cooled form.

図15に示すように熱間成形されたL字型状鋼板86は、開先84に対してブラッシングなどを行ってミルスケールの除去などを行う。そして常温状とした1対のL字型状鋼板86を、その薄肉鋼板部82と厚肉鋼板部83の遊端を相対向させた状態で溶接手段39に搬入し、開先84を利用して溶接結合87することで、図16に示すように四角形状鋼管に形成され、以て製品としての梁材88を製造し得る。   As shown in FIG. 15, the hot-formed L-shaped steel plate 86 performs brushing or the like on the groove 84 to remove the mill scale. Then, a pair of L-shaped steel plates 86 brought to room temperature are carried into the welding means 39 with their free ends of the thin steel plate portion 82 and the thick steel plate portion 83 facing each other, and the groove 84 is used. As shown in FIG. 16, the welded joint 87 is formed into a quadrangular steel pipe, so that a beam member 88 as a product can be manufactured.

すなわち梁材88は、2箇所のコーナ部85を熱間成形により直角状(外面R状の曲率半径)に曲げ成形して、上下一対の厚肉鋼板部(フランジ部に相当)83と、左右一対の薄肉鋼板部(ウエブ部に相当)82とからなる四角形状鋼管に形成される。その際に梁材88は、前述したように両薄肉鋼板部82の板厚tの加算値2tに対して、厚肉鋼板部83の板厚Tが等厚状[2t≒T]もしくは厚く[2t<T]形成されている。そして梁材88は、両薄肉鋼板部82の外面間の幅外寸Wよりも、両厚肉鋼板部83の外面間の高さ外寸Hが長く[W<H]形成され、以て長方形状の四角形状鋼管に形成されている。   That is, the beam member 88 is formed by bending two corner portions 85 into a right angle (outer surface R-shaped radius of curvature) by hot forming, and a pair of upper and lower thick steel plate portions (corresponding to flange portions) 83 and left and right It is formed in a rectangular steel pipe composed of a pair of thin steel plate portions (corresponding to web portions) 82. At that time, as described above, the thickness of the thick steel plate 83 is equal to [2t≈T] or thicker than the added value 2t of the thickness t of the both thin steel plates 82. 2t <T] is formed. The beam member 88 is formed such that the height dimension H between the outer surfaces of both thick steel plate parts 83 is longer than the outer dimension width W between the outer surfaces of both thin steel plate parts 82 [W <H]. Formed into a rectangular steel pipe.

ここで梁材88としては、たとえば、薄肉鋼板部82の板厚tが6mm、厚肉鋼板部83の板厚Tが22mm、両薄肉鋼板部82の外面間の幅外寸Wが250mm、両厚肉鋼板部83の外面間の高さ外寸Hが600mmに形成されている。これにより、両薄肉鋼板部82の板厚tの加算値2tである12mmに対して、厚肉鋼板部83の板厚Tが22mmと厚く形成され、そして幅外寸Wの250mmよりも、高さ外寸Hの600mmが長く形成されることになる。   Here, as the beam member 88, for example, the thickness t of the thin steel plate portion 82 is 6 mm, the thickness T of the thick steel plate portion 83 is 22 mm, the outer width W between the outer surfaces of both thin steel plate portions 82 is 250 mm, The height dimension H between the outer surfaces of the thick steel plate portion 83 is formed to be 600 mm. Thereby, the thickness T of the thick steel plate portion 83 is formed as thick as 22 mm with respect to 12 mm which is the added value 2t of the thickness t of the both thin steel plate portions 82, and is higher than the width outer dimension W of 250 mm. The outer dimension H of 600 mm is formed long.

したがって梁材88は、左右一対の薄肉鋼板部82を有する四角形状鋼管に形成されていながらも、両薄肉鋼板部82の板厚tを薄く形成したことにより、I型鋼(H型鋼)の形式に比べて使用材料の重量を重くすることなく、すなわち材料コストを上げることなく形成し得る。しかも梁材88は、2箇所のコーナ部85を熱間成形して四角形状鋼管に形成されていることで、I型鋼(H型鋼)の形式に比べて曲げモーメント値を上げ得、以て所定(規格)の強度などを十分に確保し得る。   Therefore, although the beam member 88 is formed in a rectangular steel pipe having a pair of left and right thin steel plate portions 82, the thickness t of both thin steel plate portions 82 is reduced, so that the shape of the I-shaped steel (H-shaped steel) is obtained. It can be formed without increasing the weight of the material used, that is, without increasing the material cost. Moreover, the beam member 88 is formed into a rectangular steel pipe by hot-forming the two corner portions 85, so that the bending moment value can be increased as compared with the type of I-shaped steel (H-shaped steel). Sufficient strength of (standard) can be secured.

このようにして得られた梁材88は、前述した実施の形態1と同様にして、鉄骨構造物の一部として使用される。その際に鉄骨構造物は、2箇所のコーナ部85を熱間成形して四角形状鋼管に形成された梁材88が使用されていることで、I型鋼(H型鋼)の梁材が使用された形式に比べて、使用材料の重量を重くすることなく、すなわち材料コストを上げることなく構成し得るとともに、曲げモーメント値を上げ得て所定(規格)の強度などを十分に確保し得、さらに横揺れを少なくした構成とし得る。さらに梁材88が、上下方向で長い長方形状の四角形状鋼管に形成されていることで、曲げモーメント値をより一層上げ得る。なお、四角形状鋼管に形成された梁材88の内部空間を利用して、コンクリートや鉄筋コンクリートを充填させることで、強度などをより一層向上し得る。   The beam member 88 thus obtained is used as a part of the steel structure in the same manner as in the first embodiment. In this case, the steel structure is made of a beam material 88 formed of a square steel pipe by hot forming two corner portions 85, so that a beam material of I-shaped steel (H-shaped steel) is used. Compared to other types, it can be constructed without increasing the weight of the material used, that is, without increasing the material cost, and the bending moment value can be increased to sufficiently secure the predetermined (standard) strength. A structure with less roll can be obtained. Furthermore, since the beam member 88 is formed in a rectangular rectangular steel pipe that is long in the vertical direction, the bending moment value can be further increased. Note that the strength and the like can be further improved by filling the concrete or reinforced concrete using the internal space of the beam member 88 formed in the rectangular steel pipe.

また2箇所のコーナ部85を熱間成形した梁材88は、残留応力の除去と靭性の回復とを図り、捩れ、曲がり、変形が殆ど生じない均質なものにし得るとともに、この梁材88は能率よく安価に得られ、以て鉄骨構造物を大幅なコストダウンで構成し得ることになる。
[実施の形態4]
次に、本発明の実施の形態4を、図17に基づいて説明する。
Further, the beam material 88 obtained by hot forming the two corner portions 85 can remove residual stress and restore toughness, and can be made to be homogeneous with almost no twisting, bending, or deformation. It can be obtained efficiently and inexpensively, so that the steel structure can be constructed at a significant cost reduction.
[Embodiment 4]
Next, a fourth embodiment of the present invention will be described with reference to FIG.

すなわち、最終段(3段目)のロール式成形手段111であって、薄肉鋼板部2の外面に下方から当接させる下位の直状の受けロール112は長尺に構成され、この受けロール112とにより薄肉鋼板部2を上下から挟持する当てロール113は上下動X自在に構成され、短尺の両厚肉鋼板部3Aの遊端に上方から当接させて押し下げ力Pを作用させる左右一対の押しロール114は上下動X自在にかつ左右動Y自在に構成され、短尺の両厚肉鋼板部3Aの外面に当接させる規制ロール115は左右動Y自在に構成されている。   In other words, the roll forming means 111 in the final stage (third stage), the lower straight receiving roll 112 that comes into contact with the outer surface of the thin steel plate portion 2 from below, is configured to be long. Accordingly, the abutting roll 113 that sandwiches the thin steel plate portion 2 from above and below is configured to freely move up and down, and a pair of left and right sides that abut on the free ends of both short thick steel plate portions 3A from above to apply a pressing force P. The push roll 114 is configured to move up and down X and move left and right Y freely, and the regulation roll 115 to be brought into contact with the outer surface of the short both thick steel plates 3A is configured to move left and right Y freely.

この実施の形態4によると、当てロール113を上下動Xさせ、押しロール114を上下動Xさせるとともに左右動Yさせ、規制ロール115を左右動Yさせて位置調整することで、最終段のロール式成形手段111を、板厚t,Tや外寸の異なる複数種のU字型状鋼板6の熱間成形に兼用し得、各種のU字型状鋼板6の熱間成形を安定して精度よく行える。   According to the fourth embodiment, the final roll is moved by moving the contact roll 113 up and down X, moving the push roll 114 up and down X and moving left and right Y, and moving the regulating roll 115 left and right Y to adjust the position. The type forming means 111 can be used for hot forming of a plurality of types of U-shaped steel plates 6 having different thicknesses t, T and external dimensions, and stable hot forming of various U-shaped steel plates 6 can be achieved. It can be done with high accuracy.

なお実施の形態4では、実施の形態1の変形例としてU字型状鋼板6の熱間成形を行う形式が示されているが、実施の形態2の変形例としてU字型状鋼板56の熱間成形を行う形式や、実施の形態3の変形例としてL字型状鋼板86の熱間成形を行う形式も同様である。   In the fourth embodiment, a form of hot forming the U-shaped steel plate 6 is shown as a modification of the first embodiment. However, as a modification of the second embodiment, the U-shaped steel plate 56 is modified. The same applies to a form for performing hot forming and a form for performing hot forming of the L-shaped steel plate 86 as a modification of the third embodiment.

上記した実施の形態1〜3では、熱間成形前における加熱手段16に通しての全体加熱を、所定温度の一例であるA変態点(たとえば850〜1050℃)の近辺(前後)としているが、加熱手段16による加熱温度は任意に設定されるものである。 In the first to third embodiments described above, the entire heating through a heating means 16 before hot forming, and the neighborhood (front and rear) of the A 3 transformation point, which is an example of a predetermined temperature (e.g. 850 to 1,050 ° C.) However, the heating temperature by the heating means 16 is arbitrarily set.

上記した実施の形態1〜3では、熱間成形部20,60,90に、3段(複数段)のロール式成形手段が配設された形式が示されているが、ロール式成形手段の段数は任意に設定されるものである。また各段のロール式成形手段におけるロール群の配置、ロールの数、ロール形状などは任意に決定されるものである。   In the first to third embodiments described above, a form in which the hot forming portions 20, 60, 90 are provided with three-stage (multiple-stage) roll-type forming means is shown. The number of stages is arbitrarily set. In addition, the arrangement of roll groups, the number of rolls, the roll shape, and the like in each roll-type forming means are arbitrarily determined.

上記した実施の形態1〜3では、鋼板1,51,81を搬送経路10上で搬送しながら、トリミング開先加工機15に通して開先4,54,84を加工しているが、これは開先を加工しない形式であってもよい。   In Embodiments 1 to 3 described above, while the steel plates 1, 51, 81 are transported on the transport path 10, the grooves 4, 54, 84 are processed through the trimming groove processing machine 15. May be in a form that does not process the groove.

上記した実施の形態1〜3では、梁材8,58,88の一例として、たとえば、両薄肉鋼板部2,52,82の板厚tが6mm、厚肉鋼板部3,53,83の板厚Tが22mmに、両薄肉鋼板部2,52,82の外面間の幅外寸Wが250mm、両厚肉鋼板部3,53,83の外面間の高さ外寸Hが600mmに形成されているが、これは、両薄肉鋼板部2,52,82の板厚tが6〜22mm、厚肉鋼板部3,53,83の板厚Tが12〜40mm、両薄肉鋼板部2,52,82の外面間の幅外寸Wが200〜600mm、両厚肉鋼板部3,53,83の外面間の高さ外寸Hが200〜1000mmに形成されているものであってもよい。   In the first to third embodiments described above, as an example of the beam members 8, 58, 88, for example, the plate thickness t of both the thin steel plate portions 2, 52, 82 is 6 mm, and the plate of the thick steel plate portions 3, 53, 83 is used. The thickness T is 22 mm, the width outer dimension W between the outer surfaces of the two thin steel plate portions 2, 52, 82 is 250 mm, and the height outer dimension H between the outer surfaces of the two thick steel plate portions 3, 53, 83 is 600 mm. However, this is because the thickness t of both thin steel plate portions 2, 52, 82 is 6-22 mm, the thickness T of the thick steel plate portions 3, 53, 83 is 12-40 mm, and both thin steel plate portions 2, 52. , 82 may be formed such that the outer width W between the outer surfaces is 200 to 600 mm, and the outer height H between the outer surfaces of both thick steel plate portions 3, 53, 83 is 200 to 1000 mm.

上記した実施の形態1〜3では、両薄肉鋼板部2,52,82の板厚tの加算値2tに対して、厚肉鋼板部3,53,83の板厚Tが厚く、すなわち[2t<T]に形成されているが、これは[t<T]の条件下で、[2t>T]に形成されたものであってもよい。   In the above-described first to third embodiments, the thickness T of the thick steel plate portions 3, 53, 83 is thicker than the added value 2t of the thickness t of both the thin steel plate portions 2, 52, 82, that is, [2t Although formed in <T], this may be formed in [2t> T] under the condition of [t <T].

上記した実施の形態1〜3では、梁材8,58,88として、両薄肉鋼板部2,52,82の外面間の幅外寸Wよりも、両厚肉鋼板部3,53,83の外面間の高さ外寸Hが長く[W<H]形成され、以て上下方向に長い長方形状の四角形状鋼管に形成されているが、これは[W>H]として幅方向に長い長方形状の四角形状鋼管に形成されたものや、[W≒H]として正方形状の四角形状鋼管に形成されたものであってもよい。   In the above-described first to third embodiments, as the beam members 8, 58, and 88, the both thick steel plate portions 3, 53, and 83 are larger than the outer width W between the outer surfaces of the two thin steel plate portions 2, 52, and 82. The outer dimension H between the outer surfaces is long [W <H] and is formed into a rectangular steel pipe having a rectangular shape that is long in the vertical direction. This is a rectangle that is long in the width direction as [W> H]. It may be formed on a rectangular steel pipe having a square shape, or may be formed on a square steel pipe having a square shape as [W≈H].

上記した実施の形態1〜3では、梁材8として幅方向で同形状の1対のU字型状鋼板6を用い、また梁材58として上下方向で同形状の1対のU字型状鋼板56を用い、また梁材88として同形状の1対のL字型状鋼板86を用いているが、これらU字型状鋼板6,56やL字型状鋼板86からなる熱間成形物として、幅方向や上下方向で異なる形状、すなわち、薄肉鋼板部2,52,82や厚肉鋼板部3,53,83の寸法が幅方向や上下方向で異なるものを溶接結合して四角形状鋼管に形成したものであってもよい。   In the first to third embodiments described above, a pair of U-shaped steel plates 6 having the same shape in the width direction is used as the beam member 8, and a pair of U-shaped shapes having the same shape in the vertical direction as the beam member 58. A steel plate 56 is used, and a pair of L-shaped steel plates 86 having the same shape is used as the beam member 88. A hot-formed product formed of the U-shaped steel plates 6 and 56 and the L-shaped steel plate 86 is used. As shown in the figure, different shapes in the width direction and the vertical direction, that is, rectangular steel pipes by welding and joining thin steel plate portions 2, 52, 82 and thick steel plate portions 3, 53, 83 in the width direction and the vertical direction It may be formed.

上記した実施の形態1では、鋼管柱41の梁材連結用角形鋼管(梁材連結部)43に、梁材8を溶接結合44bしているが、これは連結具を介して連結する形式などであってもよい。   In the first embodiment described above, the beam member 8 is weld-bonded 44b to the beam member connecting rectangular steel pipe (beam member connecting portion) 43 of the steel pipe column 41. It may be.

上記した実施の形態1では、梁材8の遊端間を、ブラケット46と連結具47とを介して連結した形式が示されているが、これは溶接結合した形式などであってもよい。   In the first embodiment described above, the form in which the free ends of the beam member 8 are connected via the bracket 46 and the connecting tool 47 is shown, but this may be a form in which welding is performed.

本発明の実施の形態1を示し、梁材の製造に使用される鋼板の一部切り欠き斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view of a steel plate used for manufacturing a beam material according to a first embodiment of the present invention. 同梁材の製造方法における工程を示す概略説明図である。Is a schematic explanatory view showing a step definitive for the manufacture how the same beam material. 同梁材の製造方法において、(a)は鋼板の搬送時の正面図、(b)は最始段のロール式成形手段部分の正面図である。Oite the manufacture how the same beam material, (a) shows the front view at the time of conveyance of the steel sheet, (b) is a front view of a roll-type molding unit portion of SaiHajimedan. 同梁材の製造方法において、(a)は2段目のロール式成形手段部分の正面図、(b)は最終段のロール式成形手段部分の正面図である。Oite the manufacture how the same beam material is a front view of (a) is a front view of a roll-type molding unit portion of the second stage, (b) the roll forming means part of the final stage. 同梁材の製造方法におけるU字型状鋼板の要部の斜視図である。It is a perspective view of the principal part of the U-shaped steel plate in the manufacturing method of the beam material. 同製造した梁材の要部の斜視図である。It is a perspective view of the principal part of the beam material manufactured. 同梁材を使用した鉄骨構造物の要部の一部切り欠き斜視図である。It is a partially cutaway perspective view of the principal part of the steel structure using the beam material. 同梁材を使用した鉄骨構造物の要部の一部切り欠き正面図である。It is a partially cutaway front view of the principal part of the steel structure using the beam material. 本発明の実施の形態2を示し、(a)は梁材の製造に使用される鋼板の一部切り欠き斜視図、(b)は最始段のロール式成形手段部分の正面図である。Embodiment 2 of the present invention is shown, in which (a) is a partially cutaway perspective view of a steel plate used for manufacturing a beam material, and (b) is a front view of a roll-type forming means portion at the first stage. 同梁材の製造方法において、(a)は2段目のロール式成形手段部分の正面図、(b)は最終段のロール式成形手段部分の正面図である。Oite the manufacture how the same beam material is a front view of (a) is a front view of a roll-type molding unit portion of the second stage, (b) the roll forming means part of the final stage. 同梁材の製造方法におけるU字型状鋼板の要部の斜視図である。It is a perspective view of the principal part of the U-shaped steel plate in the manufacturing method of the beam material. 同製造した梁材の要部の斜視図である。It is a perspective view of the principal part of the beam material manufactured. 本発明の実施の形態3を示し、(a)は梁材の製造に使用される鋼板の一部切り欠き斜視図、(b)は最始段のロール式成形手段部分の正面図である。Embodiment 3 of the present invention is shown, in which (a) is a partially cutaway perspective view of a steel plate used for manufacturing a beam material, and (b) is a front view of a roll-type forming means portion in the first stage. 同梁材の製造方法において、(a)は2段目のロール式成形手段部分の正面図、(b)は最終段のロール式成形手段部分の正面図である。Oite the manufacture how the same beam material is a front view of (a) is a front view of a roll-type molding unit portion of the second stage, (b) the roll forming means part of the final stage. 同梁材の製造方法におけるL字型状鋼板の要部の斜視図である。It is a perspective view of the principal part of the L-shaped steel plate in the manufacturing method of the beam material. 同製造した梁材の要部の斜視図である。It is a perspective view of the principal part of the beam material manufactured. 本発明の実施の形態4を示し、梁材の製造方法における最終段のロール式成形手段部分の正面図である。It shows a fourth embodiment of the present invention, is a front view of a roll-type molding unit portion of the final stage definitive for the manufacture how the beam members.

符号の説明Explanation of symbols

1 鋼板
2 薄肉鋼板部
3 厚肉鋼板部
3A 短尺の厚肉鋼板部
5 コーナ部
6 U字型状鋼板(型状鋼板)
7 溶接結合
8 梁材
10 搬送経路
15 トリミング開先加工機
16 加熱手段
20 熱間成形部
21 最始段のロール式成形手段
26 2段目のロール式成形手段
31 最終段のロール式成形手段
32 受けロール
33 当てロール
34 押しロール
35 規制ロール
38 放冷部
39 溶接手段
40 鉄骨構造物
41 鋼管柱
51 鋼板
52 薄肉鋼板部
52A 短尺の薄肉鋼板部
53 厚肉鋼板部
55 コーナ部
56 U字型状鋼板(型状鋼板)
57 溶接結合
58 梁材
60 熱間成形部
61 最始段のロール式成形手段
66 2段目のロール式成形手段
71 最終段のロール式成形手段
72 受けロール
73 当てロール
74 押しロール
75 規制ロール
81 鋼板
82 薄肉鋼板部
83 厚肉鋼板部
85 コーナ部
86 L字型状鋼板(型状鋼板)
87 溶接結合
88 梁材
90 熱間成形部
91 最始段のロール式成形手段
96 2段目のロール式成形手段
101 最終段のロール式成形手段
102 受けロール
103 当てロール
104 押しロール
105 規制ロール
111 最終段のロール式成形手段
112 受けロール
113 当てロール
114 押しロール
115 規制ロール
L 所定長さ
t 薄肉鋼板部の板厚
T 厚肉鋼板部の板厚
P 押し下げ力
W 薄肉鋼板部の外面間の幅外寸
H 厚肉鋼板部の外面間の高さ外寸
X 上下動
Y 左右動
DESCRIPTION OF SYMBOLS 1 Steel plate 2 Thin steel plate part 3 Thick steel plate part 3A Short thick steel plate part 5 Corner part 6 U-shaped steel plate (shaped steel plate)
7 Welded joint 8 Beam material 10 Conveyance path 15 Trimming groove processing machine 16 Heating means 20 Hot forming section 21 First roll forming means 26 Second roll forming means 31 Last roll forming means 32 Receiving roll 33 Contact roll 34 Push roll 35 Regulating roll 38 Cooling section 39 Welding means 40 Steel structure 41 Steel pipe column 51 Steel plate 52 Thin steel plate portion 52A Short thin steel plate portion 53 Thick steel plate portion 55 Corner portion 56 U-shaped Steel plate (shaped steel plate)
57 Welded joint 58 Beam material 60 Hot forming section 61 First roll forming means 66 Second roll forming means 71 Last roll forming means 72 Receiving roll 73 Abutting roll 74 Pushing roll 75 Restricting roll 81 Steel plate 82 Thin steel plate portion 83 Thick steel plate portion 85 Corner portion 86 L-shaped steel plate (shaped steel plate)
87 Welded joint 88 Beam material 90 Hot forming section 91 First roll forming means 96 Second roll forming means 101 Last roll forming means 102 Receiving roll 103 Contact roll 104 Push roll 105 Restricting roll 111 Roll type forming means 112 at the final stage, receiving roll 113, contact roll 114, pressing roll 115, regulating roll L, predetermined length t, thickness T of the thin steel plate portion, plate thickness P of the thick steel plate portion, pressing force W, width between the outer surfaces of the thin steel plate portion External dimension H Height between outer surfaces of thick steel plate part External dimension X Vertical movement Y Horizontal movement

Claims (6)

所定温度、またはその近辺にまで全体加熱されている鋼板は、幅方向において所定部分が薄肉鋼板部で残部が厚肉鋼板部として形成されており、この鋼板を長さ方向に搬送しながらロール式成形手段により、薄肉鋼板部と厚肉鋼板部とがコーナ部を介して直角状に位置する型状鋼板に熱間成形し、1対の型状鋼板を、その鋼板部の遊端を相対向させた状態で溶接結合して四角形状鋼管に形成したことを特徴とする梁材の製造方法。   The steel plate that is heated to the predetermined temperature or its vicinity is formed with a predetermined portion in the width direction as a thin steel plate portion and the remainder as a thick steel plate portion, and the roll type while conveying this steel plate in the length direction. By forming means, a thin steel plate part and a thick steel plate part are hot-formed into a shaped steel sheet positioned at right angles via a corner part, and a pair of shaped steel sheets are opposed to the free ends of the steel sheet part. A method for manufacturing a beam material, characterized in that a rectangular steel pipe is formed by welding in a state of being welded. 鋼板は、幅方向において中央部分が薄肉鋼板部で両側部分が短尺の厚肉鋼板部として形成されており、この鋼板を長さ方向に搬送しながらロール式成形手段により、薄肉鋼板部と短尺の両厚肉鋼板部とがそれぞれコーナ部を介して直角状に位置するU字型状鋼板に熱間成形し、1対のU字型状鋼板を、その厚肉鋼板部の遊端を相対向させた状態で溶接結合して四角形状鋼管に形成したことを特徴とする請求項1記載の梁材の製造方法。   The steel plate is formed as a thick steel plate portion with a thin steel plate portion at the center and short side portions in the width direction. Both thick steel plates are hot-formed into U-shaped steel plates positioned at right angles via the corners, and a pair of U-shaped steel plates are opposed to the free ends of the thick steel plates. 2. The method of manufacturing a beam member according to claim 1, wherein the beam material is welded and joined to form a rectangular steel pipe. 鋼板は、幅方向において両側部分が短尺の薄肉鋼板部で中央部分が厚肉鋼板部として形成されており、この鋼板を長さ方向に搬送しながらロール式成形手段により、短尺の両薄肉鋼板部と厚肉鋼板部とがそれぞれコーナ部を介して直角状に位置するU字型状鋼板に熱間成形し、1対のU字型状鋼板を、短尺の薄肉鋼板部の遊端を相対向させた状態で溶接結合して四角形状鋼管に形成したことを特徴とする請求項1記載の梁材の製造方法。   The steel plate is formed as a thin steel plate portion with a short side on both sides in the width direction and a thick steel plate portion at the center portion. And thick steel plate sections are hot-formed into U-shaped steel plates positioned at right angles through the corners, and a pair of U-shaped steel plates are opposed to the free ends of short thin steel plate sections. 2. The method of manufacturing a beam member according to claim 1, wherein the beam material is welded and joined to form a rectangular steel pipe. 鋼板は、幅方向において一側部分が薄肉鋼板部で他側部分が厚肉鋼板部として形成されており、この鋼板を長さ方向に搬送しながらロール式成形手段により、薄肉鋼板部と厚肉鋼板部とがコーナ部を介して直角状に位置するL字型状鋼板に熱間成形し、1対のL字型状鋼板を、その薄肉鋼板部の遊端と厚肉鋼板部の遊端とを相対向させた状態で溶接結合して四角形状鋼管に形成したことを特徴とする請求項1記載の梁材の製造方法。   The steel plate is formed as a thin steel plate portion on one side and a thick steel plate portion on the other side in the width direction, and the thin steel plate portion and the thick wall portion are formed by a roll forming means while conveying the steel plate in the length direction. A steel plate portion is hot-formed into an L-shaped steel plate that is positioned at right angles via a corner portion, and a pair of L-shaped steel plates is formed with a free end of the thin steel plate portion and a free end of the thick steel plate portion. The method of manufacturing a beam member according to claim 1, wherein a rectangular steel pipe is formed by welding in a state of facing each other. ロール式成形手段は複数段であり、最終段のロール式成形手段は、一方の鋼板部を当てロールと受けロールとにより上下から挟持し、他方の鋼板部の遊端に押しロールを上方から当接させて押し下げ力を作用させるとともに、他方の鋼板部の外面に規制ロールを当接させた状態で熱間成形することを特徴とする請求項1〜4のいずれか1項に記載の梁材の製造方法。   The roll-type forming means has a plurality of stages. The final-stage roll-type forming means sandwiches one steel plate portion from above and below by a contact roll and a receiving roll, and presses the push roll from above to the free end of the other steel plate portion. The beam material according to any one of claims 1 to 4, wherein the beam material is hot-formed in a state in which a pressing force is applied to contact and a regulating roll is in contact with an outer surface of the other steel plate portion. Manufacturing method. 両薄肉鋼板部の板厚の加算値に対して、厚肉鋼板部の板厚が等厚状もしくは厚く形成され、両薄肉鋼板部の外面間の幅外寸よりも、両厚肉鋼板部の外面間の高さ外寸が長く形成されていることを特徴とする請求項1〜5のいずれか1項に記載の梁材の製造方法。   The thickness of the thick steel plate is equal or thicker than the added value of the thickness of both thin steel plates, and the thickness of both thick steel plates is larger than the outer width between the outer surfaces of both thin steel plates. The method for manufacturing a beam material according to any one of claims 1 to 5, wherein a height dimension between the outer surfaces is long.
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CN110434441A (en) * 2019-08-12 2019-11-12 建科机械(天津)股份有限公司 Assembling truss process equipment

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