JPH04138801A - Manufacture of h-shape steel with thin web - Google Patents
Manufacture of h-shape steel with thin webInfo
- Publication number
- JPH04138801A JPH04138801A JP25897990A JP25897990A JPH04138801A JP H04138801 A JPH04138801 A JP H04138801A JP 25897990 A JP25897990 A JP 25897990A JP 25897990 A JP25897990 A JP 25897990A JP H04138801 A JPH04138801 A JP H04138801A
- Authority
- JP
- Japan
- Prior art keywords
- web
- flange
- waving
- cooling
- rolling
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 22
- 239000010959 steel Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 32
- 230000000452 restraining effect Effects 0.000 claims abstract description 11
- 238000005098 hot rolling Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 26
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013138 pruning Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
- B21B1/0886—H- or I-sections using variable-width rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は、フランジに対してウェブが極めて薄くＨ形
鋼製品を熱間圧延で製造する製造方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a manufacturing method for manufacturing an H-beam steel product having an extremely thin web with respect to a flange by hot rolling.
〈従来技術〉
フランジ厚とウェブ厚の比が２．０以上の薄肉ウェブＨ
形調を熱間圧延で製造する場合、フランジとウェブの厚
みの相異に基づく熱容量の差等により、フランジとウェ
ブの温度差が仕上圧延後において通常２００“Ｃ以上と
なる。その結果、その後の冷却過程においてフランジの
収縮量がウェブに比べて著しく大きくなり、ウェブは圧
縮応力状態、フランジは引張応力状態となり、ウェブの
圧縮応力が座屈応力限界を超えると、ウェブに波打ちが
発生する。<Prior art> Thin web H with a ratio of flange thickness to web thickness of 2.0 or more
When the shape is manufactured by hot rolling, the temperature difference between the flange and the web is usually 200"C or more after finish rolling due to the difference in heat capacity due to the difference in thickness between the flange and the web. As a result, after the During the cooling process, the amount of contraction of the flange becomes significantly larger than that of the web, the web becomes in a compressive stress state and the flange in a tensile stress state, and when the compressive stress of the web exceeds the buckling stress limit, waving occurs in the web.
このような薄肉ウェブＨ形鋼のウェブ波打ちを防止する
方法として、従来から種々の方法が提案されており、例
えば次のようなものがある。Various methods have been proposed in the past as methods for preventing web undulation of such thin web H-beam steel, including the following methods.
（ｉ） 特開昭５９−１９２１５２号公報Ｈ形号公報
上圧延工程に特殊な孔型を有する水平ロールを追加し、
ウェブにウェブ高さ方向の波形を形成することにより、
冷却ウェブ波の発生を防止する方法。(i) Japanese Unexamined Patent Publication No. 59-192152 H-type No. Adding a horizontal roll with a special hole shape to the upper rolling process,
By forming a waveform in the web height direction on the web,
How to prevent the occurrence of cooling web waves.
（ｉＤ 特開昭６２−１０４６０１号公報低温（ウェ
ブ２００〜５００″Ｃ）でフランジのみを仕上圧延機で
軽圧下（１〜数％の圧下率）することにより、ウェブに
ブリテンションを与えて引張応力状態に反転させ、冷却
時に発生する圧縮応力を軽減する方法。(iD JP-A No. 62-104601) By lightly rolling only the flange (rolling ratio of 1 to several %) with a finish rolling mill at a low temperature (web 200 to 500"C), the web is given britension and stretched. A method of reversing the stress state and reducing the compressive stress that occurs during cooling.
ＧｉＤ 特開昭６３−１４０７０３号公報熱間仕上、
熱間鋸断後、フランジ温度が６５０〜２００°Ｃの温度
域で、温間圧延機によりフランジを３％以下の圧下率で
軽圧下し、ウェブ残留応力を低減する方法。GiD JP-A No. 63-140703 hot finishing,
After hot sawing, the flange is lightly rolled down using a warm rolling mill at a reduction rate of 3% or less at a flange temperature range of 650 to 200°C to reduce web residual stress.
Ｇｖ）特願昭６３−２７２４６９号公報熱間仕上、熱間
鋸断後、ウェブ温度が４００゛Ｃ以下の温度域で、ウェ
ブにウェブ高さを０．２％以上拡大する拡幅力を加え、
もしくはウェブを交互に繰り返し曲げ加工してウェブ高
さ拡大し、またはフランジ温度が４００°Ｃ以下の温度
域で、Ｈ形鋼の強軸方向に対する曲げ加工を施し、ウェ
ブの残留応力を減少させる方法。Gv) Japanese Patent Application No. 63-272469 After hot finishing and hot sawing, applying a widening force to the web to increase the web height by 0.2% or more in a temperature range of 400°C or less,
Alternatively, the web height can be increased by repeatedly bending the web, or the residual stress in the web can be reduced by bending the H-shaped steel in the direction of the strong axis at a flange temperature of 400°C or less. .
〈この発明が解決しようとする課題〉
しかしながら、前述のような方法では、通常のＨ形鋼製
造設備に専用の圧延装置を追設する必要があり、あるい
は既設設備を利用したとしても圧下に大きな動力を必要
とし、設備費、ランニングコスト等からＨ形鋼自体がコ
スト高となる問題がある。<Problems to be Solved by the Invention> However, with the above-mentioned method, it is necessary to add a dedicated rolling device to the normal H-beam manufacturing equipment, or even if existing equipment is used, the rolling reduction will be large. There is a problem in that the H-shaped steel itself is expensive due to the need for power, equipment costs, running costs, etc.
一方、Ｈ形鋼のフランジを水冷し、ウェブ内部応力の減
少を図ることは一般的なことであり、また確実に効果の
ある方法である。このような水冷方法の一つとして次の
ような方法がある。On the other hand, it is a common practice to water-cool the flange of an H-section steel to reduce web internal stress, and it is certainly an effective method. The following method is one of such water cooling methods.
（ａ） 圧延過程でフランジを冷却する方法。(a) A method of cooling the flange during the rolling process.
この方法は内部応力減少に対しては極めて有効であるが
、低温圧延になること、不均一温度状態での圧延になる
ことなどのため、品質、寸法精度が悪化するので、実操
業への採用は難しい
そこで、次のような方法が考えられる。Although this method is extremely effective in reducing internal stress, the quality and dimensional accuracy deteriorate due to low temperature rolling and non-uniform temperature rolling, so it is not recommended for actual operation. This is difficult, so the following methods can be considered.
（ｂ） 仕上圧延後、フランジを冷却する方法。(b) A method of cooling the flange after finish rolling.
（ａ）のような問題はないが、このような冷却方法が適
用できるサイズ（フランジ・ウェブ比）には限界があり
、限界の見極めおよび適正水冷時間の決定が容易ではな
い。すなわち、ｂ形鋼のウェブ応力は冷却の全過程で波
打附界ツ下にある必要があるが、フランジ冷却速度が充
分でないと、常温域でウェブ応力が波打ち限界を超え、
一方、フランジ冷却速度が過大であると、そのフランジ
冷却中にウェブ応力が波打ち限界を超えてしまい、ある
サイズ以上では、ウェブの波打ち限界が低く、このどち
らかで必ず波打ちが発生することになる。Although there is no problem like (a), there is a limit to the size (flange-to-web ratio) to which such a cooling method can be applied, and it is not easy to determine the limit and determine the appropriate water cooling time. In other words, the web stress of B-section steel must be below the waving limit during the entire cooling process, but if the flange cooling rate is not sufficient, the web stress will exceed the waving limit at room temperature.
On the other hand, if the flange cooling rate is too high, the web stress will exceed the waving limit during the flange cooling, and above a certain size, the web waving limit will be low, and waving will definitely occur in one of these conditions. .
この対策として次のような方法があるが、それぞれ問題
点を有している。The following methods are available as countermeasures for this problem, but each method has its own problems.
（Ｃ） フランジ冷却速度をフランジ冷却中に波打ち
を発生させない範囲内の値に設定し、冷却時間を充分に
とる方法（許容される冷却速度と冷却時間の間には相関
があるので相関式を解く必要がある）。(C) A method of setting the flange cooling rate to a value within the range that does not cause waviness during flange cooling and allowing sufficient cooling time (there is a correlation between the allowable cooling rate and cooling time, so use the correlation formula) need to be solved).
しかし、実際操業では、長時間冷却は圧延ラインの生産
能力ダウンを引き起こすことになるので、容易には採用
できない。また、適正な冷却速度と冷却時間を決定する
ことは難しく、あるサイズ以上においては適用できない
。However, in actual operation, long-time cooling is not easily adopted because it causes a reduction in the production capacity of the rolling line. Furthermore, it is difficult to determine an appropriate cooling rate and cooling time, and it cannot be applied above a certain size.
（ｄ） フランジを圧延方向に引張って拘束しながら
フランジ冷却を実施する方法。(d) A method in which the flange is cooled while being pulled and restrained in the rolling direction.
しかし、圧延方向に拘束する方法では、適用できる材料
の長さに制約があり、長すぎると圧延方向の中央部では
、効果的に張力を加えることができず、ウェブに応力が
ほとんど働かず、効果がなくなる。また、具体的な設備
化には極めて高額な投資が必要となる問題がある。However, with the method of restraining in the rolling direction, there are restrictions on the length of the material that can be applied, and if it is too long, tension cannot be applied effectively in the center of the rolling direction, and almost no stress is applied to the web. It becomes ineffective. In addition, there is a problem in that an extremely large amount of investment is required for the installation of specific equipment.
なお、圧延過程でのフランジとウェブの温度差の減少を
図る方法として次のような方法があるが、
（ｅ） ウェブ上に乗っている水をバキュームで吸い
取る方法。The following methods are available to reduce the temperature difference between the flange and the web during the rolling process: (e) A method of sucking up water on the web using a vacuum.
（ｆ） フランジ中央部を凹ませた状態で粗圧延を行
う方法。(f) A method in which rough rolling is performed with the center part of the flange recessed.
効果が充分でなく、ウェブ波打ちを確実に防止すること
ができない。The effect is not sufficient and web waving cannot be reliably prevented.
この発明は、前述のような問題点を解消すべくなされた
もので、その目的は、従来設備を使用できると共に、比
較的安価な設備で、かつ小さな圧下刃でウェブ波打ちを
防止でき、しかも従来の水冷を適用できないサイズに対
して長さ方向全体にわたって容易かつ確実にウェブ波打
ちを防止できる薄肉ウェブＨ形鋼の製造方法を提供する
ことにある。This invention was made to solve the above-mentioned problems, and its purpose is to use conventional equipment, use relatively inexpensive equipment, and prevent web waving with a small rolling blade. An object of the present invention is to provide a method for manufacturing a thin-walled H-section steel that can easily and reliably prevent web waving over the entire length direction for sizes to which water cooling cannot be applied.
〈課題を解決するための手段〉
本発明は、第１図、第２図に示すように、フランジＩＦ
に対してウェブＩＷが極めて薄くＨ形鋼製品１を熱間圧
延で得る製造方法において、通常の熱間仕上圧延後、ウ
ェブＩＷをウェブ高さ方向に拘束しつつフランジＩＦを
強制冷却するようにしたものである。<Means for Solving the Problems> As shown in FIGS. 1 and 2, the present invention provides a flange IF
In contrast, in a manufacturing method in which an H-beam steel product 1 with an extremely thin web IW is obtained by hot rolling, the flange IF is forcibly cooled while restraining the web IW in the web height direction after normal hot finishing rolling. This is what I did.
ウェブＩＷをウェブ高さ方向に拘束し、張力を付与する
手段としては、拘束装置をウェブ高さ方向に可動とし、
機械側から力を与える方法、拘束装置を固定としておき
、ウェブ高さが冷却に伴い小さくなることを利用した力
の与え方、およびその組み合わせを考えることができる
。As a means for restraining the web IW in the web height direction and applying tension, a restraining device is movable in the web height direction,
It is possible to consider a method of applying force from the machine side, a method of applying force by keeping the restraint device fixed and utilizing the fact that the web height decreases as it cools, and combinations thereof.
第２図ないし第４図に示すのは、拘束装置の例であり、
第２図に示すのは、左右位置調整可能な水平ローラ２ａ
を有する幅可変ローラテーブル２である。第３図は、油
圧シリンダ３をフランジ間に一対で配設してなる装置で
あり、第４図はフランジ内面に当接する垂直ロール４を
架台５に上下左右位置調整可能に設けた装置である。第
３図、第４図の装置は冷却ゾーンに例えば約１ｍピッチ
で配設する。Shown in FIGS. 2 to 4 are examples of restraint devices,
What is shown in Fig. 2 is a horizontal roller 2a whose horizontal position can be adjusted.
This is a variable width roller table 2 having a width variable roller table. Fig. 3 shows a device in which a pair of hydraulic cylinders 3 are arranged between flanges, and Fig. 4 shows a device in which a vertical roll 4 that comes into contact with the inner surface of the flange is installed on a frame 5 so that its position can be adjusted vertically and horizontally. . The apparatuses shown in FIGS. 3 and 4 are arranged in the cooling zone at a pitch of about 1 m, for example.
〈作 用〉
薄肉ウェブＨ形鋼の仕上ユニバーサルミル通適時のウェ
ブとフランジの温度差は２００℃以上となっており、こ
の製品を放冷すると、第１図に示すように、３０数分後
に波打ちが発生し、フランジを充分に冷却すると、その
フランジ冷却中にウェブ応力が枝打限界を超え、波打ち
が発生する。<Function> The temperature difference between the web and flange during finishing of thin-walled web H-shaped steel through a universal mill is more than 200°C, and when this product is left to cool, it changes after 30 minutes as shown in Figure 1. When waving occurs and the flange is sufficiently cooled, the web stress exceeds the pruning limit while the flange is cooling, and waving occurs.
これに対し、Ｈ形鋼をウェブ高さ方向に拘束し、ウェブ
にウェブ高さ方向張力を付与すると、圧延方向にもフラ
ンジによる拘束のため引張応力が働くこととなり、ウェ
ブの圧延方向圧縮応力値そのものが軽減され、水冷実施
時の応力が枝打限界を超えることがなく、いい換えれば
製造可能限界が拡大されることになる。On the other hand, if the H-shaped steel is restrained in the web height direction and tension is applied to the web in the web height direction, tensile stress will also be applied in the rolling direction due to the restraint by the flanges, and the web's rolling direction compressive stress value The stress is reduced, and the stress during water cooling does not exceed the pruning limit, in other words, the manufacturable limit is expanded.
さらに、Ｈ形鋼のウェブは両端をフランジに拘束される
ため、波打ちはウェブ中央部に集中発生し、両端は直線
が維持されるので、ウェブ高さ方向に張力を付与するこ
とによって枝打限界を容易に拡大することができる。Furthermore, since both ends of the web of H-section steel are restrained by flanges, waving is concentrated in the center of the web, and both ends remain straight, so by applying tension in the web height direction, it is possible to can be easily expanded.
つまり、Ｈ形鋼を高さ方向に拘束すると、波打ちの発生
しにくい状態を作ることができ、その結果、フランジの
強冷却が可能となり、製造可能サイズを拡大でき、フラ
ンジ水冷のみでは波打ちが発生していたサイズを波打ち
を発生させることなく製造できる。In other words, by constraining the H-shaped steel in the height direction, it is possible to create a condition in which waving is less likely to occur.As a result, the flange can be strongly cooled, increasing the size that can be manufactured, and waving can occur with only water cooling the flange. It is now possible to manufacture the previous size without causing any waving.
また、圧延方向にフランジを拘束する場合には、適用で
きる材料の長さに制約があり、長すぎると圧延方向の中
央部ではほとんど効果がなくなるのに対し、本発明では
ウェブ高さ方向に張力を付与するので、材料長さの影響
を受けず、長さ方向全体にわたって容易かつ確実にウェ
ブ波打ちを防止でき、常に安定した効果を発揮できる。In addition, when restraining a flange in the rolling direction, there are restrictions on the length of the material that can be applied, and if it is too long, there will be almost no effect in the center of the rolling direction, whereas in the present invention, tension is applied in the web height direction. As a result, web waving can be easily and reliably prevented over the entire length without being affected by the length of the material, and a stable effect can always be exhibited.
さらに、本発明では、従来設備の冷却ゾーンに比較的簡
単な構成の装置を追加するだけでよく、比較的少額の投
資で設備化が可能である。Further, in the present invention, it is only necessary to add a device with a relatively simple configuration to the cooling zone of conventional equipment, and the equipment can be installed with a relatively small investment.
また、拘束力は、例えばウェブ高さ７００ｍに対して０
．５ｍ＋程度付加するだけでよく、大きな圧下刃を必要
としない。In addition, the restraining force is, for example, 0 for a web height of 700 m.
．． It is only necessary to add about 5m+, and there is no need for a large rolling blade.
〈実 施 例〉
これは、（ウェブ高さ）×（フランジ幅）×（ウェブ／
フランジ厚）がＨ７００Ｘ２００Ｘ６／１９ （フラン
ジ・ウェブ厚比：３．１７）のＨ形鋼に通用した例であ
り、種々の条件で本発明と従来例（フランジ水冷のみ）
を実施したところ次表のような結果が得られた。<Example> This is (web height) x (flange width) x (web/
This is an example that is applicable to H-beam steel with a flange thickness of H700 x 200 x 6/19 (flange to web thickness ratio: 3.17), and the present invention and the conventional example (flange water cooling only) under various conditions.
When carried out, the results shown in the following table were obtained.
なお、本発明では、第４図の装置を用いており、垂直ロ
ールは冷却ゾーン全長にわたって１ｍピッチで配置した
。また、垂直ロールの開度は、仕上圧延直後のウェブ高
さ内法寸法Ａ±０．５〔薗〕に設定し、ウェブ高さを拘
束した。In the present invention, the apparatus shown in FIG. 4 was used, and the vertical rolls were arranged at a pitch of 1 m over the entire length of the cooling zone. Further, the opening degree of the vertical rolls was set to the internal dimension A of the web height immediately after finish rolling, A±0.5, to restrict the web height.
評価方法は目視による
×：室温時点でウェブに波打ちがあるもの○：室温時点
でウェブが直線状部のもの仕上ユニバーサルミル通過時
のウェブとフランジの温度差は２５０°Ｃ以上となって
いる。この製品を放冷すると、ウェブが２２０°Ｃの時
点で波打ちが発生する。The evaluation method is visual inspection. ×: The web is wavy at room temperature. ○: The web has a straight portion at room temperature. The temperature difference between the web and the flange when passing through a finishing universal mill is 250°C or more. When this product is allowed to cool, waving occurs when the web reaches 220°C.
前表のように、仕上圧延直後のウェブ／フランジ温度が
６００／８５０°Ｃの状態からフランジ温度が６００°
Ｃになるようにフランジ冷却を実施すると、冷却開始後
８０秒の時点（フランジ冷却中）でウェブに波打ちが発
生し、良品を得ることができなかった。そこで、同一の
初期条件、同一の冷却速度条件で７０秒間だけフランジ
冷却を実施すると、ウェブが５０°Ｃの時点で波打ちが
発生し、やはり良品を製造できなかった。As shown in the previous table, the web/flange temperature immediately after finish rolling is 600/850°C, and the flange temperature is 600°C.
When flange cooling was performed to obtain C, waving occurred in the web 80 seconds after the start of cooling (during flange cooling), and a good product could not be obtained. Therefore, when flange cooling was performed for 70 seconds under the same initial conditions and the same cooling rate conditions, waving occurred when the web reached 50°C, and a good product could not be manufactured.
つまり、Ｈ７００Ｘ ２００ Ｘ６／１９は本発明を適
用する必要のあるサイズということであり、仕上圧延後
にウェブ高さを拘束しながら従来例と同一の初期条件、
同一の冷却速度条件で１００〜１６０秒間フランジ冷却
したところ、常温迄の冷却のどの時点においてもウェブ
波打ちは発生せず、良品を製造することが可能であった
。In other words, H700X 200
When flange cooling was performed for 100 to 160 seconds under the same cooling rate conditions, web waving did not occur at any point during cooling to room temperature, and it was possible to produce a good product.
なお、仕上圧延後にウェブ高さを拘束しながら従来例と
同一の初期条件、同一の冷却速度条件で７０〜９０秒間
フランジ冷却したところフランジ水冷後の放冷過程でウ
ェブ波打ちが発生したが、これはウェブ高さを拘束する
ことによってフランジ強冷却が可能な条件を作ったにも
かかわらず十分な強冷却を実施しなかったからである。In addition, when the flange was cooled for 70 to 90 seconds under the same initial conditions and the same cooling rate conditions as the conventional example while restraining the web height after finish rolling, web waving occurred during the cooling process after the flange was water-cooled. This is because, although conditions were created that enabled strong flange cooling by restricting the web height, sufficient strong cooling was not carried out.
〈発明の効果〉
前述の通り、この発明に係る薄肉ウェブＨ形鋼の製造方
法は、通常の熱間仕上圧延後、ウェブをウェブ高さ方向
に拘束しつつフランジを強制冷却するようにしたため、
次のような効果を奏する。<Effects of the Invention> As mentioned above, in the method for manufacturing a thin web H-section steel according to the present invention, after normal hot finish rolling, the flange is forcedly cooled while restraining the web in the web height direction.
It has the following effects.
（ｉ） ウェブ高さ方向の拘束によりウェブに引張応
力が働くとともに、波釘限界が拡大されることにより強
冷却が可能となり、従来のフランジ水冷を適用できない
サイズであっても、ウェブ波打を発生させることなく製
造できる。(i) In addition to applying tensile stress to the web due to restraint in the web height direction, strong cooling is possible by expanding the corrugation limit, which prevents web corrugation even if the size is such that conventional flange water cooling cannot be applied. It can be manufactured without any generation.
（ｉＤ ウェブ高さ方向の拘束であるため、長さ方向
にわたって容易かつ確実にウェブ波打を防止できる。(iD Since the web is restrained in the height direction, web waving can be easily and reliably prevented in the length direction.
ＧｉＤ 従来設備を使用できると共に、比較的安価な
拘束装置を追設することにより、大幅に製造コストを上
昇させることなく薄肉ウェブＨ形鋼の製造可能サイズ拡
大を図ることができる。GiD By using conventional equipment and adding a relatively inexpensive restraint device, it is possible to expand the size of thin web H-section steel that can be manufactured without significantly increasing manufacturing costs.
第１図は本発明に係るウェブ応力推移を示すグラフ、第
２図は本発明を実施するための装置を示す概略図、第３
図、第４図は同様の装置の他の例を示す概略図である。
１・・・Ｈ形鋼、 ＩＦ・・・フランジ１１１１
・・・ウェブ、 ２・・・ローラテーブル２ａ
・・・水平ローラ、 ３・・・油圧シリンダ４・・
・垂直ロールFIG. 1 is a graph showing the web stress transition according to the present invention, FIG. 2 is a schematic diagram showing an apparatus for carrying out the present invention, and FIG.
4 are schematic diagrams showing other examples of similar devices. 1...H-shaped steel, IF...flange 1111
...Web, 2...Roller table 2a
...Horizontal roller, 3...Hydraulic cylinder 4...
・Vertical roll
Claims (1)
を熱間圧延で得る製造方法において、通常の熱間仕上圧
延後、ウェブをウェブ高さ方向に拘束しつつフランジを
強制冷却することを特徴とする薄肉ウェブＨ形鋼の製造
方法。(1) In the manufacturing method of hot rolling H-beam steel products where the web is extremely thin relative to the flange, the flange is forcibly cooled while restraining the web in the web height direction after normal hot finishing rolling. A method for producing a characteristic thin-walled web H-section steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25897990A JPH0813365B2 (en) | 1990-09-28 | 1990-09-28 | Method for producing thin web H-section steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25897990A JPH0813365B2 (en) | 1990-09-28 | 1990-09-28 | Method for producing thin web H-section steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04138801A true JPH04138801A (en) | 1992-05-13 |
| JPH0813365B2 JPH0813365B2 (en) | 1996-02-14 |
Family
ID=17327673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25897990A Expired - Lifetime JPH0813365B2 (en) | 1990-09-28 | 1990-09-28 | Method for producing thin web H-section steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0813365B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021010924A (en) * | 2019-07-05 | 2021-02-04 | 日本製鉄株式会社 | Cooler for h-shaped steel |
-
1990
- 1990-09-28 JP JP25897990A patent/JPH0813365B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021010924A (en) * | 2019-07-05 | 2021-02-04 | 日本製鉄株式会社 | Cooler for h-shaped steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0813365B2 (en) | 1996-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1289685B1 (en) | Hot rolling thin strip | |
| JP3056668B2 (en) | Strip continuous casting hot rolling heat treatment equipment and strip continuous casting hot rolling heat treatment method | |
| JPH04138801A (en) | Manufacture of h-shape steel with thin web | |
| JP3883614B2 (en) | Method and equipment for making hot rolled strips | |
| JPS59133902A (en) | Hot rolling method of h-beam | |
| JP2738280B2 (en) | Manufacturing method of external constant parallel flange channel steel | |
| JPS63140703A (en) | Production of extremely thin web h section steel | |
| JPH03505704A (en) | Manufacturing method and manufacturing plant for metal strips with a thickness of 10 mm or less | |
| JPS58176010A (en) | Cold rolling method for controlling shape | |
| JPH1177104A (en) | Method for rolling shape | |
| JP3153478B2 (en) | Method and apparatus for cooling stainless steel strip | |
| JPH10216826A (en) | Manufacture of t-shape steel | |
| JPH0966303A (en) | Production of hot rolled steel sheet excellent in surface condition | |
| JPH0531501A (en) | Method for rolling shape steel having flanges | |
| JPH0550101A (en) | Method for rolling h-shape steel | |
| JPS62161916A (en) | Flange cooler for h-shape steel | |
| JP3114573B2 (en) | Method and apparatus for cooling H-section steel | |
| JPH11319945A (en) | Manufacture of steel plate and its device | |
| JP2820805B2 (en) | Method for producing thin hot rolled steel sheet with excellent surface properties | |
| JP2006315041A (en) | Continuous casting method | |
| JPH03271320A (en) | Method and apparatus for cooling thin-walled wide flange shape | |
| JPH02169102A (en) | Method for rolling shape steel | |
| JPS57184507A (en) | Controlling method for cooling hot rolled steel strip | |
| JPS5893819A (en) | Production of h-shaped steel having no web wave | |
| JPH0215816A (en) | Restricting cooling control method for shape steel |