JP5652350B2 - Manufacturing method of H-section steel - Google Patents

Manufacturing method of H-section steel Download PDF

Info

Publication number
JP5652350B2
JP5652350B2 JP2011163851A JP2011163851A JP5652350B2 JP 5652350 B2 JP5652350 B2 JP 5652350B2 JP 2011163851 A JP2011163851 A JP 2011163851A JP 2011163851 A JP2011163851 A JP 2011163851A JP 5652350 B2 JP5652350 B2 JP 5652350B2
Authority
JP
Japan
Prior art keywords
hole mold
shaped
split
steel material
shaped steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2011163851A
Other languages
Japanese (ja)
Other versions
JP2013027882A (en
Inventor
悦男 東
悦男 東
良文 小谷
良文 小谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Priority to JP2011163851A priority Critical patent/JP5652350B2/en
Publication of JP2013027882A publication Critical patent/JP2013027882A/en
Application granted granted Critical
Publication of JP5652350B2 publication Critical patent/JP5652350B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Metal Rolling (AREA)

Description

本発明は、スラブ等の断面が扁平形状のＨ形鋼素材からＨ形鋼を製造する方法に関するものである。   The present invention relates to a method for manufacturing an H-section steel from an H-section steel material having a flat cross section such as a slab.

Ｈ形鋼を製造する際に用いられるＨ形鋼素材としては、連続鋳造機で鋳造されたスラブやビームブランクなどが挙げられ、Ｈ形鋼のフランジ幅が３００ｍｍを超える場合には、断面が扁平形状のスラブをＨ形鋼素材として用いることが多い。しかし、スラブをＨ形鋼素材として用いると、粗圧延工程でスラブをドックボーン形状に粗造形圧延する必要があり、非常に大きな圧下量を必要とするため、スラブの長手方向両端部に大きなフィッシュテールが発生するなどの問題がある。   Examples of the H-section steel material used when manufacturing the H-section steel include slabs and beam blanks cast by a continuous casting machine. When the flange width of the H-section steel exceeds 300 mm, the cross section is flat. A slab having a shape is often used as an H-shaped steel material. However, if a slab is used as a H-shaped steel material, the slab needs to be roughly shaped and rolled into a dockbone shape in the rough rolling process, which requires a very large amount of rolling, so a large fish is formed at both longitudinal ends of the slab. There are problems such as tails.

そこで、スラブをドックボーン形状に粗造形圧延する方法として、図５に示すような上側孔型ロール６と下側孔型ロール７を用い、上側孔型ロール６と下側孔型ロール７との間に形成された４つの孔型２１ａ，２１ｂ，２１ｃ，２１ｄによりスラブをドックボーン形状に粗造形圧延する方法が知られている（例えば、特許文献１、特許文献２参照）。
また、特許文献３には、粗圧延機の孔型ロールとして、互いにフランジ部の一部を共用した複数の孔型を有するものを用い、Ｈ形鋼素材としてのビームブランクにフランジ形状の調整およびウェブ圧下を行った後、ビームブランクのフランジ部を孔型ロールの両端側に押し拡げてビームブランクのウェブ高さを高くする方法が記載されている。 Therefore, as a method of roughly shaping and rolling the slab into a dockbone shape, an upper hole-shaped roll 6 and a lower hole-shaped roll 7 as shown in FIG. There is known a method of roughly shaping and rolling a slab into a dockbone shape by using four hole molds 21a, 21b, 21c, and 21d formed therebetween (see, for example, Patent Document 1 and Patent Document 2).
Moreover, in patent document 3, what has a some hole type which shared a part of flange part mutually as a hole type roll of a rough rolling mill, and adjustment of a flange shape to the beam blank as an H-section steel material, and A method is described in which after the web reduction, the flange portion of the beam blank is pushed and expanded to both ends of the perforated roll to increase the web height of the beam blank.

特開２００３−０１０９０２号公報（０００３、図１０）JP2003-010902A (0003, FIG. 10) 特開２００５−０８８０２７号公報（０００３、図６）Japanese Patent Laying-Open No. 2005-088027 (0003, FIG. 6) 特開２０００−２７１６０１号公報（００１３−００２０）JP 2000-271601 A (0013-0020)

特許文献１、２に記載された方法によると、大きな圧下量を要することなくスラブをドックボーン形状に造形圧延することが可能であるが、上側孔型ロール６と下側孔型ロール７との間に形成された孔型２１ａ〜２１ｄのうち孔型２１ｄの幅ｗが９００ｍｍである場合には、孔型２１ｄを通過したＨ形鋼素材のウェブ高さは９００ｍｍ程度となる。このため、例えばウェブ高さが９５０ｍｍや１０００ｍｍのＨ形鋼を製造するためには、孔型２１ｄの幅ｗが異なる複数種類の孔型ロールを用意しなければならないという問題がある。   According to the methods described in Patent Documents 1 and 2, it is possible to form and roll a slab into a dockbone shape without requiring a large amount of reduction, but the upper hole roll 6 and the lower hole roll 7 When the width w of the hole mold 21d is 900 mm among the hole molds 21a to 21d formed therebetween, the web height of the H-shaped steel material that has passed through the hole mold 21d is about 900 mm. For this reason, for example, in order to manufacture an H-section steel having a web height of 950 mm or 1000 mm, there is a problem that a plurality of types of perforated rolls having different widths w of the perforated mold 21d must be prepared.

また、特許文献３に記載された孔型ロールはビームブランク専用であるため、Ｈ形鋼素材としてスラブを用いる場合には、スラブをビームブランク形状に造形圧延するための孔型ロールを別途必要とするという問題がある。
本発明は、このような問題点に着目してなされたものであり、断面が扁平形状のＨ形鋼素材からＨ形鋼を製造する際に粗圧延機の孔型ロールとして複数種類の孔型ロールを用意することなくウェブ高さの異なる複数種類のＨ形鋼を製造することのできるＨ形鋼の製造方法を提供することを目的とするものである。 Moreover, since the perforated roll described in Patent Document 3 is exclusively for the beam blank, when a slab is used as the H-shaped steel material, a perforated roll for shaping and rolling the slab into a beam blank shape is required separately. There is a problem of doing.
The present invention has been made paying attention to such problems, and when producing H-section steel from an H-section steel material having a flat cross section, a plurality of types of perforations are used as a perforation roll of a rough rolling mill. An object of the present invention is to provide a method for producing an H-section steel capable of producing a plurality of types of H-section steels having different web heights without preparing a roll.

上記目的を達成するために、本発明は、断面が扁平形状のＨ形鋼素材を粗圧延機により粗造形圧延し、次いで前記Ｈ形鋼素材に中間圧延を施した後、仕上圧延を施して製造されるＨ形鋼の製造方法であって、前記粗圧延機として、前記Ｈ形鋼素材の両側端面にＶ字形の割りを形成する割り形成用孔型と、該割り形成用孔型の側方に形成されたウェブ圧下用孔型と、該ウェブ圧下用孔型と前記割り形成用孔型との間に形成されたドックボーン造形用孔型と、該ドックボーン造形用孔型と前記割り形成用孔型との間に形成された割り深さ増大用孔型と、前記ウェブ圧下用孔型と前記ドックボーン造形用孔型との間に形成された上下一対の拡幅用突起とを上側孔型ロールと下側孔型ロールとの間に有するものを用い、前記Ｈ形鋼素材の両側端面に形成された割りの深さを前記割り深さ増大用孔型の中央部に形成された上下一対のＶ字形突起により大きくした後、前記割りを押し拡げて前記Ｈ形鋼素材を前記ドックボーン造形用孔型によりドックボーン形状に造形し、次いで前記Ｈ形鋼のウェブに相当するＨ形鋼素材のウェブ相当部を前記ウェブ圧下用孔型により圧下した後、前記Ｈ形鋼のフランジに相当するＨ形鋼素材のフランジ相当部の間隔を前記拡幅用突起と前記Ｖ字形突起とにより前記上側孔型ロールと前記下側孔型ロールの軸方向に拡げてＨ形鋼を製造することを特徴とする。   In order to achieve the above-mentioned object, the present invention performs rough shaping rolling of an H-section steel material having a flat cross section with a roughing mill, and then intermediate rolling the H-section steel material, followed by finish rolling. A method of manufacturing an H-section steel, wherein the rough rolling mill includes a split-forming hole mold that forms V-shaped splits on both end faces of the H-shaped steel material, and a side of the split-forming hole mold A web forming hole mold formed on the side, a web forming hole mold formed between the web forming hole mold and the split forming hole mold, and the dock bone forming hole mold and the split mold. A split depth increasing hole mold formed between the forming hole mold and a pair of upper and lower widening protrusions formed between the web reducing hole mold and the dock bone shaping hole mold; Use what you have between the perforated roll and the lower perforated roll, and form it on both end faces of the H-shaped steel material The split depth is increased by a pair of upper and lower V-shaped protrusions formed in the center of the split depth increasing hole mold, and then the split is expanded to form the H-shaped steel material for the dock bone modeling. After forming into a dock bone shape by a hole mold, and then reducing the web equivalent part of the H-shaped steel material corresponding to the H-shaped steel web by the web-reducing hole mold, H corresponding to the flange of the H-shaped steel The H-section steel is manufactured by expanding the interval of the flange-corresponding portion of the shaped steel material in the axial direction of the upper hole roll and the lower hole roll by the widening protrusion and the V-shaped protrusion. .

本発明によれば、Ｈ形鋼のフランジに相当するＨ形鋼素材のフランジ相当部を拡幅用突起とＶ字形突起とにより孔型ロールの軸方向に拡げることで、Ｈ形鋼素材のウェブ相当部が孔型ロールの軸方向に引き延ばされ、これにより、１種類の孔型ロールでウェブ高さの異なる粗造形Ｈ形鋼素材を粗圧延機で粗造形することが可能となるので、断面が扁平形状のＨ形鋼素材からＨ形鋼を製造する際に粗圧延機の孔型ロールとして複数種類の孔型ロールを用意することなくウェブ高さの異なる複数種類のＨ形鋼を製造することができる。   According to the present invention, the portion corresponding to the flange of the H-shaped steel material corresponding to the flange of the H-shaped steel is expanded in the axial direction of the perforated roll by the widening protrusion and the V-shaped protrusion. Since the part is stretched in the axial direction of the perforated roll, and it becomes possible to roughly model the rough shaped H-section steel material having a different web height with one kind of perforated roll, using a rough rolling machine, Produces multiple types of H-section steels with different web heights without preparing multiple types of hole-type rolls as a hole-type roll for roughing mills when manufacturing H-section steel from H-section steel material with a flat cross section can do.

本発明の一実施形態に用いられる圧延設備の一例を示す図である。It is a figure which shows an example of the rolling equipment used for one Embodiment of this invention. 図１に示される粗圧延機の上側孔型ロールと下側孔型ロールとの間に形成された孔型を示す図である。It is a figure which shows the hole shape formed between the upper hole type roll and lower side hole type roll of the rough rolling mill shown by FIG. 本発明の一実施形態に係るＨ形鋼の製造方法を説明するための図である。It is a figure for demonstrating the manufacturing method of the H-section steel which concerns on one Embodiment of this invention. 粗圧延機で粗造形されたＨ形鋼素材と中間圧延機水平ロールとの関係を示す図である。It is a figure which shows the relationship between the H-section steel raw material rough-formed by the rough rolling mill, and the intermediate rolling mill horizontal roll. 従来技術を説明するための図である。It is a figure for demonstrating a prior art.

以下、図１〜図４を参照して本発明の実施の形態について説明する。
本発明の一実施形態に係るＨ形鋼の製造方法は、図１に示される圧延設備、すなわち断面が扁平形状のＨ形鋼素材１を加熱する加熱炉２と、加熱炉２で加熱処理されたＨ形鋼素材１を粗造形する粗圧延機３と、粗圧延機３で粗造形されたＨ形鋼素材１に中間圧延を施す中間圧延機４と、中間圧延機４で中間圧延が施されたＨ形鋼素材１に仕上圧延を施す仕上圧延機５とを備えた圧延設備を用いてＨ形鋼を製造する方法であり、粗圧延機３は、図２に示すように、上側孔型ロール６と下側孔型ロール７との間に、割り形成用孔型８、ウェブ圧下用孔型１０、ドックボーン造形用孔型１２および割り深さ増大用孔型１４を有している。 Hereinafter, embodiments of the present invention will be described with reference to FIGS.
The manufacturing method of the H-section steel according to one embodiment of the present invention is heat-treated in the rolling equipment shown in FIG. 1, that is, the heating furnace 2 that heats the H-section steel material 1 having a flat cross section, and the heating furnace 2. The rough rolling machine 3 for roughly shaping the H-shaped steel material 1, the intermediate rolling machine 4 for performing intermediate rolling on the H-shaped steel material 1 roughly shaped by the rough rolling machine 3, and intermediate rolling by the intermediate rolling machine 4 2 is a method of manufacturing H-section steel using a rolling mill equipped with a finish rolling mill 5 that performs finish rolling on the H-section steel material 1, and the rough rolling mill 3 has an upper hole as shown in FIG. Between the mold roll 6 and the lower hole mold roll 7, a split forming hole mold 8, a web reducing hole mold 10, a dock bone modeling hole mold 12, and a split depth increasing hole mold 14 are provided. .

割り形成用孔型８はＨ形鋼素材１の両側端面にＶ字形の割りを形成するものであって、Ｈ形鋼素材１の厚さとほぼ同じ幅で上側孔型ロール６と下側孔型ロール７との間に形成されている。また、割り形成用孔型８は上下一対の割り形成用突起９を有し、これらの割り形成用突起９は割り形成用孔型８の中央部に相対向して形成されている。
ウェブ圧下用孔型１０はＨ形鋼のウェブに相当するＨ形鋼素材１のウェブ相当部を圧下するものであって、割り形成用孔型８の側方に形成されている。また、ウェブ圧下用孔型１０は上下一対の圧下用凸部１１を有し、これらの圧下用凸部１１はウェブ圧下用孔型１０の中央部に相対向して形成されている。 The split forming hole mold 8 forms V-shaped splits on both end faces of the H-shaped steel material 1, and has an upper hole roll 6 and a lower hole mold having the same width as the thickness of the H-shaped steel material 1. It is formed between the rolls 7. Further, the split forming hole mold 8 has a pair of upper and lower split forming protrusions 9, and these split forming protrusions 9 are formed opposite to the central portion of the split forming hole mold 8.
The web rolling hole mold 10 is for rolling down the web-corresponding portion of the H-shaped steel material 1 corresponding to the H-shaped steel web, and is formed on the side of the split forming hole mold 8. Further, the web pressing hole mold 10 has a pair of upper and lower pressing protrusions 11, and these pressing protrusions 11 are formed opposite to the central part of the web pressing hole mold 10.

ドックボーン造形用孔型１２はＨ形鋼素材１をドックボーン形状に造形するものであって、ウェブ圧下用孔型１０と割り形成用孔型８との間に形成されている。また、ドックボーン造形用孔型１２は上下一対の押し拡げ用突起１３を有し、これらの押し拡げ用突起１３はドックボーン造形用孔型１２の中央部に相対向して形成されている。
割り深さ増大用孔型１４は割り形成用孔型８によりＨ形鋼素材１の両側端面に形成された割りの深さを大きくするものであって、ドックボーン造形用孔型１２と割り形成用孔型８との間に形成されている。また、割り深さ増大用孔型１４は上下一対のＶ字形突起１５を有し、これらのＶ字形突起１５は割り深さ増大用孔型１４の中央部に相対向して形成されている。 The dock bone forming hole mold 12 forms the H-shaped steel material 1 into a dock bone shape, and is formed between the web pressing hole mold 10 and the split forming hole mold 8. The dock bone modeling hole mold 12 has a pair of upper and lower push-out protrusions 13, and these push-expansion protrusions 13 are formed opposite to the center of the dock bone modeling hole mold 12.
The split depth increasing hole mold 14 increases the split depth formed on the both end faces of the H-shaped steel material 1 by the split forming hole mold 8, and is split with the dock bone forming hole mold 12. It is formed between the hole mold 8. Further, the split depth increasing hole mold 14 has a pair of upper and lower V-shaped protrusions 15, and these V-shaped protrusions 15 are formed to face each other at the center of the split depth increasing hole mold 14.

粗圧延機３は、また、ウェブ圧下用孔型１０とドックボーン造形用孔型１２との間に上下一対の拡幅用突起１６（図２参照）を有している。これらの拡幅用突起１６はＨ形鋼のフランジに相当するＨ形鋼素材１のフランジ相当部を拡げるためのものであって、割り深さ増大用孔型１４のＶ字形突起１５とほぼ同じ高さでＶ字状に形成されている。
このような粗圧延機３を用いてＨ形鋼素材１を粗造形する場合は、Ｈ形鋼素材１を割り形成用孔型８に挿入し、図３（ａ）に示すように、割り形成用孔型８の中央部に形成された上下一対の割り形成用突起９によりＨ形鋼素材１の両側端面に割り１７を形成する。次に、Ｈ形鋼素材１を割り深さ増大用孔型１４に挿入し、図３（ｂ）に示すように、割り深さ増大用孔型１４の中央部に形成された上下一対のＶ字形突起１５により割り１７の深さを大きくする。 The rough rolling mill 3 also has a pair of upper and lower widening protrusions 16 (see FIG. 2) between the web reduction hole mold 10 and the dockbone modeling hole mold 12. These widening protrusions 16 are for expanding the flange-corresponding portion of the H-shaped steel material 1 corresponding to the H-shaped steel flange, and are approximately the same height as the V-shaped protrusions 15 of the split depth increasing hole mold 14. Now it is formed in a V shape.
When roughly shaping the H-section steel material 1 using such a rough rolling mill 3, the H-section steel material 1 is inserted into the split forming hole mold 8, and as shown in FIG. A split 17 is formed on both side end surfaces of the H-shaped steel material 1 by a pair of upper and lower split forming projections 9 formed at the center of the hole mold 8. Next, the H-section steel material 1 is inserted into the split depth increasing hole mold 14, and as shown in FIG. 3 (b), a pair of upper and lower V formed at the center of the split depth increasing hole mold 14. The depth of the split 17 is increased by the letter-shaped protrusion 15.

Ｈ形鋼素材１の両側端面に形成された割り１７の深さを大きくしたならば、Ｈ形鋼素材１をドックボーン造形用孔型１２に挿入し、図３（ｃ）に示すように、ドックボーン造形用孔型１２の中央部に形成された上下一対の押し拡げ用突起１３により割り１７を押し拡げてＨ形鋼素材１をドックボーン形状に造形する。次に、Ｈ形鋼素材１をウェブ圧下用孔型１０に挿入し、図３（ｄ）に示すように、Ｈ形鋼のウェブに相当するＨ形鋼素材１のウェブ相当部１８をウェブ圧下用孔型１０の中央部に形成された上下一対の圧下用凸部１１により圧下する。   If the depth of the split 17 formed on both side end faces of the H-shaped steel material 1 is increased, the H-shaped steel material 1 is inserted into the dock bone shaping hole mold 12, and as shown in FIG. The split 17 is expanded by a pair of upper and lower push-out projections 13 formed at the center of the dockbone shaping hole mold 12 to shape the H-section steel material 1 into a dockbone shape. Next, the H-section steel material 1 is inserted into the web rolling hole mold 10, and the web-corresponding portion 18 of the H-section steel material 1 corresponding to the H-section steel web is web-rolled as shown in FIG. The pressing is performed by a pair of upper and lower pressing projections 11 formed at the center of the hole mold 10.

このようにしてＨ形鋼素材１のウェブ相当部１８をウェブ圧下用孔型１０により圧下したならば、図３（ｅ）に示すように、Ｈ形鋼のフランジに相当するＨ形鋼素材１のフランジ相当部１ｂ，１ｃがＶ字形突起１５と拡幅用突起１６に係合するようにＨ形鋼素材１を上側孔型ロール６と下側孔型ロール７との間にセットする。そして、上側孔型ロール６と下側孔型ロール７を互いに接近させ、図３（ｆ）に示すように、Ｈ形鋼のフランジに相当するＨ形鋼素材１のフランジ相当部１９，２０の間隔を拡幅用突起１６とＶ字形突起１５とにより孔型ロール６，７の軸方向に拡げると、これに伴ってＨ形鋼素材１のウェブ相当部１８が孔型ロール６，７の軸方向に引き延ばされる。これにより、１種類の孔型ロールでウェブ高さの異なる粗造形Ｈ形鋼素材を粗圧延機で粗造形することが可能となるので、断面が扁平形状のＨ形鋼素材からＨ形鋼を製造する際に粗圧延機の孔型ロールとして複数種類の孔型ロールを用意することなくウェブ高さの異なる複数種類のＨ形鋼を製造することができる。   When the web-corresponding portion 18 of the H-shaped steel material 1 is reduced by the web-reducing hole mold 10 in this way, the H-shaped steel material 1 corresponding to the flange of the H-shaped steel as shown in FIG. The H-shaped steel material 1 is set between the upper hole-shaped roll 6 and the lower hole-shaped roll 7 so that the flange-corresponding portions 1b and 1c engage with the V-shaped protrusion 15 and the widening protrusion 16. Then, the upper perforated roll 6 and the lower perforated roll 7 are brought close to each other, and as shown in FIG. 3 (f), the flange corresponding portions 19 and 20 of the H-shaped steel material 1 corresponding to the H-shaped steel flange are formed. When the gap is widened in the axial direction of the perforated rolls 6 and 7 by the widening protrusion 16 and the V-shaped protrusion 15, the web equivalent portion 18 of the H-shaped steel material 1 is accordingly moved in the axial direction of the perforated rolls 6 and 7. To be extended to. As a result, it becomes possible to roughly model a rough shaped H-shaped steel material having different web heights with a single type of roll, using a roughing mill, so that the H-shaped steel can be changed from an H-shaped steel material having a flat cross section. A plurality of types of H-section steels having different web heights can be manufactured without preparing a plurality of types of hole-type rolls as a hole-type roll of a roughing mill when manufacturing.

また、粗圧延機３で粗造形圧延されたＨ形鋼素材１に中間圧延を中間圧延機４で施す際に、図４に示すように、ユニバーサルミルの水平ロールとして、ウェブ高さとフランジ幅が９００ｍｍ×４００ｍｍ、９５０ｍｍ×４００ｍｍ、１０００ｍｍ×４００ｍｍの３種類のＨ形鋼製造用水平ロールを使用することができる。   Further, when intermediate rolling is performed on the H-shaped steel material 1 roughly shaped and rolled by the rough rolling mill 3 by the intermediate rolling mill 4, as shown in FIG. Three types of horizontal rolls for manufacturing H-section steel of 900 mm × 400 mm, 950 mm × 400 mm, and 1000 mm × 400 mm can be used.

１…Ｈ形鋼素材
２…加熱炉
３…粗圧延機
４…中間圧延機
５…仕上圧延機
６…上側孔型ロール
７…下側孔型ロール
８…割り形成用孔型
９…割り形成用突起
１０…ウェブ圧下用孔型
１１…圧下用凸部
１２…ドックボーン造形用孔型
１３…押し拡げ用突起
１４…割り深さ増大用孔型
１５…Ｖ字形突起
１６…拡幅用突起
１７…割り
１８…ウェブ相当部
１９，２０…フランジ相当部
２１ａ〜２１ｄ…孔型 DESCRIPTION OF SYMBOLS 1 ... H-shaped steel raw material 2 ... Heating furnace 3 ... Rough rolling mill 4 ... Intermediate rolling mill 5 ... Finishing rolling mill 6 ... Upper hole type roll 7 ... Lower side hole type roll 8 ... Split forming hole type 9 ... For split forming Projection 10: Hole for web reduction 11 ... Convex for reduction 12 ... Hole for dock bone modeling 13 ... Protrusion for expansion 14 ... Hole for increase in depth 15 ... V-shaped projection 16 ... Projection for widening 17 ... Split 18 ... Web equivalent 19, 20 ... Flange equivalent 21a-21d ... Hole type

Claims (1)

断面が扁平形状のＨ形鋼素材を粗圧延機により粗造形圧延し、次いで前記Ｈ形鋼素材に中間圧延を施した後、仕上圧延を施して製造されるＨ形鋼の製造方法であって、
前記粗圧延機として、前記Ｈ形鋼素材の両側端面にＶ字形の割りを形成する割り形成用孔型と、該割り形成用孔型の側方に形成されたウェブ圧下用孔型と、該ウェブ圧下用孔型と前記割り形成用孔型との間に形成されたドックボーン造形用孔型と、該ドックボーン造形用孔型と前記割り形成用孔型との間に形成された割り深さ増大用孔型と、前記ウェブ圧下用孔型と前記ドックボーン造形用孔型との間に形成された上下一対の拡幅用突起とを上側孔型ロールと下側孔型ロールとの間に有するものを用い、
前記Ｈ形鋼素材の両側端面に形成された割りの深さを前記割り深さ増大用孔型の中央部に形成された上下一対のＶ字形突起により大きくした後、前記割りを押し拡げて前記Ｈ形鋼素材を前記ドックボーン造形用孔型によりドックボーン形状に造形し、次いで前記Ｈ形鋼のウェブに相当するＨ形鋼素材のウェブ相当部を前記ウェブ圧下用孔型により圧下した後、前記Ｈ形鋼のフランジに相当するＨ形鋼素材のフランジ相当部の間隔を前記拡幅用突起と前記Ｖ字形突起とにより前記上側孔型ロールと前記下側孔型ロールの軸方向に拡げてＨ形鋼を製造することを特徴とするＨ形鋼の製造方法。 A method for producing an H-shaped steel, which is produced by roughly shaping and rolling an H-shaped steel material having a flat cross section with a roughing mill, then subjecting the H-shaped steel material to intermediate rolling and then finish rolling. ,
As the rough rolling mill, a split forming hole mold for forming a V-shaped split on both end faces of the H-shaped steel material, a web rolling hole mold formed on the side of the split forming hole mold, Dock bone forming hole mold formed between the web reduction hole mold and the split forming hole mold, and the split depth formed between the dock bone forming hole mold and the split forming hole mold A height increasing hole mold and a pair of upper and lower widening protrusions formed between the web reducing hole mold and the dock bone shaping hole mold between the upper hole roll and the lower hole roll. Use what you have,
After the split depth formed on the both end faces of the H-shaped steel material is enlarged by a pair of upper and lower V-shaped projections formed in the center portion of the split depth increasing hole mold, the split is pushed and expanded. H-shaped steel material is shaped into a dock bone shape by the dock bone shaping hole mold, and then the web equivalent portion of the H-shaped steel material corresponding to the H-shaped steel web is crushed by the web rolling hole mold, The distance between the flange corresponding portions of the H-shaped steel material corresponding to the flange of the H-shaped steel is expanded in the axial direction of the upper hole-shaped roll and the lower hole-shaped roll by the widening protrusion and the V-shaped protrusion. A method for producing an H-section steel, characterized by producing a shape steel.
JP2011163851A 2011-07-27 2011-07-27 Manufacturing method of H-section steel Active JP5652350B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011163851A JP5652350B2 (en) 2011-07-27 2011-07-27 Manufacturing method of H-section steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011163851A JP5652350B2 (en) 2011-07-27 2011-07-27 Manufacturing method of H-section steel

Publications (2)

Publication Number Publication Date
JP2013027882A JP2013027882A (en) 2013-02-07
JP5652350B2 true JP5652350B2 (en) 2015-01-14

Family

ID=47785470

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011163851A Active JP5652350B2 (en) 2011-07-27 2011-07-27 Manufacturing method of H-section steel

Country Status (1)

Country Link
JP (1) JP5652350B2 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5953121B2 (en) * 1981-03-05 1984-12-24 川崎製鉄株式会社 Rolling method for widening large material for rough shaped steel billet and its rolling roll
JPS58188501A (en) * 1982-04-30 1983-11-04 Sumitomo Metal Ind Ltd Production of rough shape steel ingot for h-shaped steel
JP3511919B2 (en) * 1998-11-25 2004-03-29 Ｊｆｅスチール株式会社 Method for producing coarse shaped billet for large H-section steel

Also Published As

Publication number Publication date
JP2013027882A (en) 2013-02-07

Similar Documents

Publication Publication Date Title
WO2016148030A1 (en) H-shaped steel production method
JP3678003B2 (en) Rolling method of rough steel slab
JP6521054B2 (en) H-shaped steel manufacturing method
JP6447286B2 (en) H-section steel manufacturing method and H-section steel products
JP2004358541A (en) Method for manufacturing shaped bloom and caliber roll
JP5652350B2 (en) Manufacturing method of H-section steel
JP6724672B2 (en) Method for manufacturing H-section steel
JP6593457B2 (en) H-section steel manufacturing method and rolling device
JP6446716B2 (en) Manufacturing method of H-section steel
JP5741291B2 (en) Manufacturing method of H-section steel
JP6627641B2 (en) Method for manufacturing H-section steel
JP6668963B2 (en) Method of manufacturing H-section steel
JP6565691B2 (en) H-section steel manufacturing method and H-section steel products
JP2012071346A (en) Method of manufacturing h-section steel and h-section steel manufacturing equipment
JP6816483B2 (en) Manufacturing method of H-section steel
JP2004322105A (en) Method for manufacturing wide flange shape and grooved roll
JP6447285B2 (en) Manufacturing method of H-section steel
JP7003841B2 (en) Manufacturing method of H-section steel
JP2018043248A (en) Method for production of h-section steel
JP2017170468A (en) Molding caliber and manufacturing method of h-shaped steel
JP6593456B2 (en) H-section steel manufacturing method and H-section steel products
JP6569535B2 (en) H-section steel manufacturing method and H-section steel products
JP6531653B2 (en) H-shaped steel manufacturing method
WO2019088225A1 (en) H-shaped steel manufacturing method
JP5938983B2 (en) Method for shaping and rolling coarse steel slab and method for producing H-section steel

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20140220

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20141016

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20141021

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20141103

R150 Certificate of patent or registration of utility model

Ref document number: 5652350

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250