JP2001137943A - Method and device for controlling flatness of metallic sheet - Google Patents
Method and device for controlling flatness of metallic sheetInfo
- Publication number
- JP2001137943A JP2001137943A JP32768499A JP32768499A JP2001137943A JP 2001137943 A JP2001137943 A JP 2001137943A JP 32768499 A JP32768499 A JP 32768499A JP 32768499 A JP32768499 A JP 32768499A JP 2001137943 A JP2001137943 A JP 2001137943A
- Authority
- JP
- Japan
- Prior art keywords
- metal plate
- flatness
- hot
- heating
- edge portion
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鉄、アルミニウ
ム、チタン等金属板の幅方向エッジ部に発生する耳波
が、冷却前の幅方向の温度偏差が原因となって発生する
ことに着目し、圧延直後に加熱装置により金属板のエッ
ジ部を加熱する事によって金属板の平坦度を制御する方
法及び装置に関する。具体的には、熱延鋼板や厚板鋼板
の平坦度制御方法及び装置に関するものである。BACKGROUND OF THE INVENTION The present invention focuses on the fact that an ear wave generated at a width direction edge portion of a metal plate such as iron, aluminum and titanium is generated due to a temperature deviation in a width direction before cooling. And a method and apparatus for controlling the flatness of a metal plate by heating an edge portion of the metal plate by a heating device immediately after rolling. More specifically, the present invention relates to a method and an apparatus for controlling flatness of a hot-rolled steel plate or a thick steel plate.
【０００２】[0002]
【従来の技術】従来、金属材料特に鋼材は、圧延工程か
ら次工程の冷却工程を経て冷却後に発生する鋼板波（耳
波）は、熱間圧延機、或いは圧延後の熱間矯正機で幅方
向中央部に若干の鋼板波（中波）を発生させることによ
り、鋼板波を過補償して防止する方法を採っていた。ま
た、これでも制御が旨く行かない場合は、精整工程で矯
正加工を施すことが新たに必要であった。2. Description of the Related Art Conventionally, in a metal material, particularly a steel material, a sheet wave (ear wave) generated after cooling through a cooling process from a rolling process to a next process is processed by a hot rolling mill or a hot straightening machine after rolling. A method of generating a slight steel plate wave (medium wave) at the center in the direction to overcompensate and prevent the steel plate wave has been adopted. In addition, if the control still does not work well, it is necessary to newly perform correction processing in the refining process.
【０００３】このようなことから、これまで鋼板波を防
止するための方法が種々提案されている。例えば、特開
平５−２６９５２７号公報では、金属ストリップの平坦
度形状制御方法として、冷却完了後に金属ストリップを
巻き取る前にテンションレベラーを設置して平坦度矯正
を行う方法に於いて、該テンションレベラーの最終ロー
ル直前のロールを金属ストリップの張力の幅方向分布が
測定可能な形状検出ロールとし、該形状検出ロールから
の金属ストリップの平坦度情報を基に該形状検出ロール
の押し込み量設定を変更して金属ストリップの平坦度形
状を制御する方法が提案されている。また、特開平１０
−２６３６５８号公報では、熱間仕上圧延機の出側に設
置した平坦度計による平坦度情報と巻き取り機前に設置
した平坦度計によって測定される巻き付く前の平坦度情
報より、伸び率差を求めて仕上圧延機のベンダー制御に
フィードバックすることによって金属ストリップの平坦
度形状を制御する方法が提案されている。[0003] In view of the above, various methods have been proposed so far for preventing steel sheet waves. For example, Japanese Patent Application Laid-Open No. 5-269527 discloses a flatness shape control method for a metal strip in which a flatness correction is performed by installing a tension leveler after cooling is completed and before winding the metal strip. The roll immediately before the final roll is a shape detection roll capable of measuring the width distribution of the tension of the metal strip, and the pushing amount setting of the shape detection roll is changed based on the flatness information of the metal strip from the shape detection roll. There has been proposed a method for controlling the flatness shape of a metal strip. Also, Japanese Patent Application Laid-Open
According to Japanese Patent No. 263658, the elongation rate is determined from flatness information obtained by a flatness meter installed on the exit side of a hot finishing mill and flatness information before winding measured by a flatness meter installed before a winding machine. A method of controlling the flatness shape of a metal strip by obtaining a difference and feeding it back to a bender control of a finishing mill has been proposed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
た特開平５−２６９５２７号公報或いは特開平１０−２
６３６５８号公報記載の金属ストリップの平坦度形状制
御方法では、平坦度形状制御の基準となる情報として
は、平坦度或いは伸び歪み差であり、板幅方向にわたる
温度分布情報はない。圧延工程で常温近くまで冷却すれ
ば板幅方向にわたる温度分布はフラットであるが、通
常、殆どの材料は材質の作り込みのために高温で巻き取
るために、板幅方向に渡る温度分布は板端部が中央部に
比べて低くなる温度偏差が発生する。従って、一旦この
ような方法で伸び歪み差が解消されたとしても、この時
点での温度偏差が常温になる熱応力として残留してしま
うため、平坦度の改善には結びつかない。However, Japanese Patent Application Laid-Open No. 5-269527 or Japanese Patent Application Laid-Open No. 10-2
In the flatness shape control method for a metal strip described in JP-A-63658, the information serving as a reference for the flatness shape control is flatness or elongation-strain difference, and there is no temperature distribution information in the plate width direction. The temperature distribution in the width direction of the sheet is flat when cooled to near room temperature in the rolling process, but usually, most of the material is wound at a high temperature to make the material, so the temperature distribution across the width of the sheet is A temperature deviation occurs in which the end is lower than the center. Therefore, even if the elongation-strain difference is once eliminated by such a method, the temperature deviation at this point remains as thermal stress at room temperature, which does not lead to improvement in flatness.
【０００５】本発明は、上述した従来技術の有する問題
点を解決するもので、圧延が完了した金属材料に対し、
冷却後の金属板の幅方向エッジ部に発生する耳波を防止
し、平坦度を向上させる方法及び装置を提供することを
目的とする。[0005] The present invention solves the above-mentioned problems of the prior art.
An object of the present invention is to provide a method and an apparatus for preventing ear waves generated at a width direction edge portion of a metal plate after cooling and improving flatness.
【０００６】[0006]
【課題を解決するための手段】本発明は、仕上げ圧延と
水冷却（ＲＯＴ冷却、制御冷却等の加速冷却）又は熱間
矯正機の間に鋼板エッジ部を加熱することにより、金属
材料に対し、冷却するまえに推定され得る形状の伸び歪
み差と熱歪み差を予測し、予めその歪み差を常温で小さ
くすることで平坦度を向上させることを特徴とする。SUMMARY OF THE INVENTION The present invention relates to a method for heating a metal material by heating a steel sheet edge between finish rolling and water cooling (accelerated cooling such as ROT cooling and control cooling) or a hot straightening machine. It is characterized in that a difference in elongation strain and a difference in heat distortion of a shape that can be estimated before cooling is predicted, and the flatness is improved by reducing the difference in strain at room temperature in advance.
【０００７】すなわち、本発明の要旨は以下のとおりで
ある。 （１）熱間圧延を完了した後、金属板の幅エッジ部を加
熱し、その後、水冷却及び／又は熱間矯正を行うことを
特徴とする金属板の平坦度制御方法。 （２）熱間圧延を完了した後、熱間矯正を行い、金属板
の幅エッジ部を加熱し、その後、放冷又は水冷却するこ
とを特徴とする金属板の平坦度制御方法。 （３）水冷却がＲＯＴ冷却であり、ＲＯＴ冷却後金属板
を巻き取ることを特徴とする前記（１）記載の金属板の
平坦度制御方法。 （４）水冷却及び／又は熱間矯正後、金属板を放冷する
ことを特徴とする前記（１）記載の金属板の平坦度制御
方法。 （５）熱間圧延を完了した後、金属板の幅エッジ部を加
熱する前に金属板の表面温度を測定し、当該測定温度に
基づいて金属板幅エッジ部の加熱温度を制御することを
特徴とする前記（１）〜（４）の何れか１項に記載の金
属板の平坦度制御方法。 （６）金属板の幅エッジ部を加熱する際に、金属板表面
幅中央部と幅エッジ部の温度差を５０℃以内とすること
を特徴とする前記（１）〜（５）の何れか１項に記載の
金属板の平坦度制御方法。 （７）レーザー照射加熱装置を用いて、金属板の幅エッ
ジ部を加熱することに加え、エッジ部をトリミングする
ことを特徴とする前記（１）〜（６）の何れか１項に記
載の金属板の平坦度制御方法。 （８）金属板の先端が熱間仕上げ圧延機を出て、次に上
下１対或いは２対のピンチロールを通過したのちに当該
ピンチロールで金属板を押さえながら搬送することを特
徴とする前記（１）〜（７）の何れか１項に記載の金属
板の平坦度制御方法。That is, the gist of the present invention is as follows. (1) A flatness control method for a metal plate, comprising heating a width edge portion of the metal plate after completion of hot rolling, and then performing water cooling and / or hot straightening. (2) A flatness control method for a metal plate, wherein after the hot rolling is completed, hot straightening is performed, the width edge portion of the metal plate is heated, and then the metal plate is cooled or cooled with water. (3) The flatness control method for a metal plate according to the above (1), wherein the water cooling is ROT cooling, and the metal plate is wound up after the ROT cooling. (4) The flatness control method for a metal plate according to the above (1), wherein the metal plate is allowed to cool after water cooling and / or hot straightening. (5) After completing hot rolling, measure the surface temperature of the metal plate before heating the width edge portion of the metal plate, and control the heating temperature of the metal plate width edge portion based on the measured temperature. The flatness control method for a metal plate according to any one of the above (1) to (4), which is characterized in that: (6) The method according to any one of (1) to (5), wherein, when heating the width edge portion of the metal plate, the temperature difference between the center portion of the metal plate surface width and the width edge portion is set to 50 ° C. or less. 2. The method for controlling flatness of a metal plate according to claim 1. (7) The method according to any one of (1) to (6), wherein the edge portion is trimmed in addition to heating the width edge portion of the metal plate using a laser irradiation heating device. A method for controlling the flatness of a metal plate. (8) The metal plate exits the hot finishing rolling mill, and then passes through a pair of upper and lower pinch rolls, and then is conveyed while holding the metal plate with the pinch rolls. The method for controlling flatness of a metal plate according to any one of (1) to (7).
【０００８】（９）熱間仕上げ圧延機と水冷却装置及び
／又は熱間矯正機の間に金属板幅エッジ部加熱装置を有
することを特徴とする金属板の平坦度制御装置。 （１０）熱間仕上げ圧延機の後に配置された熱間矯正機
の後に金属板幅エッジ部加熱装置を有することを特徴と
する金属板の平坦度制御装置。 （１１）金属板幅エッジ部加熱装置の後に制御冷却装置
を有することを特徴とする前記（１０）記載の金属板の
平坦度制御装置。 （１２）熱間仕上げ圧延機と前記加熱装置の間に金属板
表面温度測定装置を有することを特徴とする前記（９）
〜（１１）の何れか１項に記載の金属板の平坦度制御装
置。 （１３）熱間仕上げ圧延機と金属板幅エッジ部加熱装置
の間に少なくとも上下１対のピンチロールを有すること
を特徴とする前記（９）〜（１２）の何れか１項に記載
の金属板の平坦度制御装置。 （１４）金属板幅エッジ部加熱装置が、誘導加熱装置、
レーザー照射加熱装置、プラズマ照射加熱装置又はガス
燃焼加熱装置であることを特徴とする特徴とする前記
（９）〜（１３）の何れか１項に記載の金属板の平坦度
制御装置。にある。(9) A flatness control device for a metal plate, comprising a metal plate width edge heating device between a hot finishing mill and a water cooling device and / or a hot straightening device. (10) A flatness control device for a metal plate, comprising a metal plate width edge heating device after a hot straightening machine arranged after a hot finishing rolling mill. (11) The flatness control device for a metal plate according to (10), further including a control cooling device after the metal plate width edge portion heating device. (12) The above (9), wherein a metal sheet surface temperature measuring device is provided between the hot finishing mill and the heating device.
The flatness control device for a metal plate according to any one of (1) to (11). (13) The metal according to any one of the above (9) to (12), wherein at least one pair of upper and lower pinch rolls is provided between the hot finishing rolling mill and the metal plate width edge portion heating device. Plate flatness control device. (14) The metal plate width edge portion heating device is an induction heating device,
The flatness control device for a metal plate according to any one of (9) to (13), which is a laser irradiation heating device, a plasma irradiation heating device, or a gas combustion heating device. It is in.
【０００９】ここで、金属材料の幅エッジ部の温度と
は、金属材料端部から５〜２０mmの範囲における表面温
度と定義する。Here, the temperature at the width edge of the metal material is defined as the surface temperature within a range of 5 to 20 mm from the edge of the metal material.
【００１０】[0010]
【発明の実施の形態】本発明者らは、平坦度悪化のメカ
ニズム及び向上させるための方策について種々の検討を
行った。以下、図面に基づいて、本発明の原理について
説明する。本発明者らは熱延鋼板の製造工程において金
属板の平坦度悪化メカニズムを掴むために実機実験を実
施した。図１は熱延鋼板の製造工程における仕上げ圧延
機以降の製造設備概要図である。まず、熱延鋼板は仕上
げ圧延機１を経て所定の製造サイズに圧延され、ランア
ウトテーブル（ＲＯＴ）２によって通板され、所定の材
質に作り込むためにＲＯＴ冷却装置３によって所定の板
温度まで冷却され、コイラー４によってコイル状に巻き
取られる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present inventors have conducted various studies on the mechanism of deterioration of flatness and measures for improving the flatness. Hereinafter, the principle of the present invention will be described with reference to the drawings. The present inventors conducted an actual machine experiment in order to grasp the mechanism of deterioration of flatness of a metal plate in a manufacturing process of a hot-rolled steel sheet. FIG. 1 is a schematic diagram of manufacturing equipment after a finish rolling mill in a manufacturing process of a hot-rolled steel sheet. First, a hot-rolled steel sheet is rolled to a predetermined production size through a finishing mill 1, passed through a run-out table (ROT) 2, and cooled to a predetermined plate temperature by a ROT cooling device 3 in order to produce a predetermined material. Then, it is wound into a coil shape by the coiler 4.
【００１１】巻き取る板温度は材質によって色々異なる
が１００〜７５０℃まであり、本発明において問題とし
ている平坦度は、このコイル温度が室温まで下がった時
点で巻き解くとエッジ部に耳波と呼ばれる波状の面外変
形を起こした場合である。多くの熱延鋼板は耳波であ
り、本発明は、耳波を改善することを狙っている。それ
以外の場合は、コイラー４の軸やピンチロール（ＰＲ）
が凸で、巻き取り張力が異常に大きい場合は、エッジで
はなくセンター部に波の出る中波が発生する場合がある
が、これは本発明の対象外である。図２に耳波の定義を
示す。エッジ部の波高さＨを波のピッチＬで割り、１０
０倍して、パーセント表示で表す。The temperature of the plate to be wound varies depending on the material, but ranges from 100 ° C. to 750 ° C. The flatness, which is a problem in the present invention, is called an ear wave at the edge when the coil is unwound when the coil temperature drops to room temperature. This is a case where wavy out-of-plane deformation occurs. Many hot rolled steel sheets are ear waves, and the present invention aims to improve ear waves. Otherwise, the axis of the coiler 4 or pinch roll (PR)
Is convex and the take-up tension is abnormally large, a middle wave may be generated at the center instead of at the edge, but this is outside the scope of the present invention. FIG. 2 shows the definition of the ear wave. The wave height H at the edge is divided by the wave pitch L, and 10
Multiply by 0 and represent in percent.
【００１２】本発明者らこの製造工程内において仕上げ
圧延機出側に設置した鋼板センターと両サイドエッジ２
０mmの温度が測れる温度計５を使って、熱延鋼板同一サ
イズ（板厚２mm、板幅１２００mm）の熱延鋼板で同一鋼
種、同一観測ポイント（コイルセンターからの距離４０
０ｍ）の位置でのセンターとエッジ２０mm位置の表面温
度差と冷間平坦度の関係を整理した。その結果、図３に
示すように仕上げ温度出側における板の表面温度差と平
坦度は高い相関を示し、この表面温度差を用いれば平坦
度が予測可能で、言い換えれば、温度差を無くすように
ＲＯＴ冷却前に鋼板エッジ部を加熱することにより板幅
方向の均一化を計れば、平坦な鋼板が作れることを見出
し、前記（１）及び（９）の発明をするに至った。In this manufacturing process, the present inventors set the steel sheet center and both side edges 2 installed on the exit side of the finishing mill.
Using a thermometer 5 capable of measuring a temperature of 0 mm, a hot-rolled steel sheet of the same size (thickness 2 mm, width 1200 mm) has the same steel type and the same observation point (distance from the coil center 40 mm).
The relationship between the surface temperature difference between the center and the edge 20 mm at the position of 0 m) and the cold flatness was arranged. As a result, as shown in FIG. 3, the surface temperature difference and flatness of the plate at the finish temperature output side show a high correlation, and the flatness can be predicted by using this surface temperature difference, in other words, the temperature difference is eliminated. It has been found that a flat steel plate can be produced by heating the edge portion of the steel plate before ROT cooling to make the plate uniform in the width direction. Thus, the inventions (1) and (9) have been made.
【００１３】熱延鋼板では前記（３）の発明にあるよう
に、水冷却はＲＯＴ冷却であり、ＲＯＴ冷却後熱延鋼板
を巻き取ることにより、巻き戻し後も耳波のない良好な
鋼板が得られる（図４（ａ）参照）。特に、金属材料ス
トリップでは捲き取る際にテンションを掛けて捲き取
る。圧延後、冷却を開始するまでの時間が０．５〜３秒
で有り、高温であればストリップ幅方向断面内応力分布
を小さくする方向でクリープを起こしたり、テンション
によってクリープを起こすため、圧延で生じた残留応力
や耳波や中波となったストリップは矯正されてしまう。
従って、この時点の温度偏差がそのまま常温まで冷やし
た際の残留応力になり、偏差が大きくなると残留応力が
大きくなり、平坦度悪化となる。そこで、温度偏差を無
くすように前記（２）の発明を実施する。In the hot-rolled steel sheet, water cooling is ROT cooling as described in the invention (3). By rolling the hot-rolled steel sheet after ROT cooling, it is possible to obtain a good steel sheet without ear waves even after unwinding. (See FIG. 4A). In particular, when a metal material strip is wound up, tension is applied to the strip, and the strip is wound up. After rolling, the time until the start of cooling is 0.5 to 3 seconds. If the temperature is high, creep occurs in the direction of reducing the stress distribution in the cross section in the width direction of the strip, or creep occurs due to tension. The resulting residual stress and strips that have become ear waves or medium waves are corrected.
Therefore, the temperature deviation at this point becomes the residual stress when cooled to room temperature as it is, and when the deviation increases, the residual stress increases and the flatness deteriorates. Then, the invention of the above (2) is implemented so as to eliminate the temperature deviation.
【００１４】また、厚鋼板では、エッジ加熱後、熱間矯
正のみを行っても、エッジ加熱をしない場合に比べ形状
の良好な鋼板が得られる。また、いわゆる制御冷却（水
冷却）を行い、必要に応じ、制御冷却の前又は後で熱間
矯正を行っても良いが、形状の良好な厚鋼板を得るため
には制御冷却と熱間矯正を行った方が好ましい。本発明
の工程概要図を図４（ｂ）、（ｄ）、（ｅ）、（ｇ）に
示す。Further, in the case of a thick steel plate, even if only hot straightening is performed after edge heating, a steel plate having a better shape can be obtained as compared with a case where edge heating is not performed. Also, so-called controlled cooling (water cooling) may be performed, and if necessary, hot straightening may be performed before or after controlled cooling. However, in order to obtain a thick steel plate having a good shape, controlled cooling and hot straightening are performed. Is preferably performed. FIGS. 4 (b), (d), (e), and (g) show the process outline diagrams of the present invention.
【００１５】前記（２）及び（１０）の発明では、熱間
矯正後にエッジ加熱を行う。エッジ加熱のみを行いその
まま放冷してもエッジ加熱を行わなかった場合に比べ、
形状の良好な鋼板が得られる。本発明の工程概要図を図
４（ｃ）に示す。In the inventions (2) and (10), edge heating is performed after hot straightening. Compared to the case where only edge heating was performed and edge heating was not performed
A steel sheet having a good shape can be obtained. FIG. 4 (c) shows a schematic diagram of the process of the present invention.
【００１６】また、（１１）の発明にもあるようにエッ
ジ加熱後、制御冷却をしても鋼板幅方向の温度が均一に
なっているので、冷却後も形状の良好な鋼板が得られ、
冷間矯正等が不要になる。矯正機を通過すると板自体は
この時点で残留応力が小さくなる。しかし、構成するロ
ールや設備自体はロールの焼き付きや設備保護の為に直
接外部冷却水によって冷却されており、金属材料自体も
矯正加工中に冷却されエッジ部が冷えて、センターとエ
ッジ部に温度差がついてしまい、このまま冷却される
と、温度偏差分の熱歪みが残留してしまうため、常温ま
で冷却されると歪みに相当する熱応力が発生し、座屈限
界を超えれば、波形状として発生してしまう。そこで、
矯正機を通過した後に加熱によって温度偏差を無くすよ
うに前記（２）の発明を実施する。本発明の工程概要図
を図４（ｆ）に示す。Further, as in the invention of (11), even after controlled heating after edge heating, the temperature in the width direction of the steel sheet is uniform, so that a steel sheet having a good shape after cooling can be obtained.
Cold correction and the like become unnecessary. After passing through the straightener, the plate itself has reduced residual stress at this point. However, the rolls and equipment themselves are directly cooled by external cooling water to protect the rolls from burning and protect the equipment.The metal material itself is also cooled during the straightening process, and the edges cool down. There is a difference, and if it is cooled as it is, thermal strain corresponding to the temperature deviation will remain, so when cooled to room temperature, thermal stress equivalent to the strain will occur, and if it exceeds the buckling limit, it will have a wavy shape. Will occur. Therefore,
After passing through the straightener, the invention of the above (2) is carried out so as to eliminate the temperature deviation by heating. FIG. 4 (f) shows a schematic diagram of the process of the present invention.
【００１７】前記（４）の発明では、エッジ加熱後、制
御冷却及び／又は熱間矯正を行った後に放冷することに
より、エッジ加熱を行わなかった場合に比べ、冷却後も
形状の良好な鋼板が得られる。本発明の工程概要図を図
４（ｂ）、（ｄ）、（ｅ）、（ｇ）に示す。In the invention of the above (4), after the edge heating, controlled cooling and / or hot straightening is performed and then the cooling is performed, so that the shape after cooling is better than when the edge heating is not performed. A steel sheet is obtained. FIGS. 4 (b), (d), (e), and (g) show the process outline diagrams of the present invention.
【００１８】前記（５）及び（１２）の発明では、熱間
圧延終了後、エッジ加熱を行う前に金属板の表面温度を
測定することにより、より精度の高い温度制御が可能と
なる（図４（ａ）〜（ｇ）参照）。尚、図４（ｃ）及び
（ｆ）で、測温は矯正後に行っているが、仕上げ圧延
後、或いは矯正前に行っても良い。表面温度測定個所は
熱延仕上げ圧延機からエッジ加熱装置の間であればどこ
でも構わないが、より精度の高い形状を得るためにはエ
ッジ加熱装置の直前に設けることが好ましい。温度測定
においてはサーモビュアー等による幅方向の分布形式の
測定が望ましいが、ピンポイントにセンターと両サイド
のエッジ５〜２０mmでの温度３ヶ所の測定を行うことが
好ましい。５mm未満は測定精度が出ないし、２０mm超は
特徴を掴み難い。In the inventions of (5) and (12), the temperature control can be performed with higher accuracy by measuring the surface temperature of the metal plate after the end of the hot rolling and before performing the edge heating (FIG. 4 (a) to (g)). In FIGS. 4C and 4F, the temperature measurement is performed after straightening, but may be performed after finish rolling or before straightening. The surface temperature measurement point may be anywhere between the hot rolling mill and the edge heating device, but is preferably provided immediately before the edge heating device in order to obtain a more accurate shape. In the temperature measurement, it is desirable to measure the distribution in the width direction by a thermoviewer or the like, but it is preferable to measure the temperature at three points at the center and edges of both sides at 5 to 20 mm in a pinpoint manner. If it is less than 5 mm, the measurement accuracy is not high, and if it is more than 20 mm, it is difficult to grasp the features.
【００１９】エッジ加熱装置としては、前記（１４）の
発明にあるように、誘導加熱装置、レーザー照射加熱装
置、プラズマ照射加熱装置又はガス燃焼加熱装置のいず
れかであることが好ましい。The edge heating device is preferably any one of an induction heating device, a laser irradiation heating device, a plasma irradiation heating device, and a gas combustion heating device as described in the above (14).
【００２０】前記（６）の発明では、金属板幅中央部と
幅エッジ部の温度差を５０℃以下、好ましくは５０℃以
下、より好ましくは２５℃以下、更に好ましくは±５℃
以下とすることにより、冷却前に推定される伸び歪み差
と熱歪み差に起因するその歪み差を常温で小さくするこ
とで形状の良好な金属板を得ることができる。極力、金
属板の幅方向温度分布をフラットにすることが好まし
く、エッジ部が幅中央部より高くなっても良い。In the invention (6), the temperature difference between the central portion and the width edge portion of the metal plate is 50 ° C. or less, preferably 50 ° C. or less, more preferably 25 ° C. or less, and further preferably ± 5 ° C.
In the following, a metal plate having a good shape can be obtained by reducing the difference in strain caused by the difference in elongation strain and the difference in thermal strain estimated before cooling at room temperature. It is preferable to make the temperature distribution in the width direction of the metal plate as flat as possible, and the edge portion may be higher than the center portion in the width.
【００２１】前記（７）の発明では、レーザ照射加熱装
置を用いてエッジ加熱を行うことにより、エッジ部をト
リミングできるので、工程を簡略化することができる。
レーザーの出力高めて制御すれば、エッジドロップと呼
ばれるストリップ圧延で発生する規定寸法に満たない薄
くなった部分を加熱と同時にトリミング出来るので、前
記（７）の発明を実施する。In the invention (7), since the edge portion can be trimmed by performing the edge heating using the laser irradiation heating device, the process can be simplified.
If the output is controlled by increasing the laser output, a thinned portion, which is called edge drop and does not reach a specified size and is generated by strip rolling, can be trimmed simultaneously with heating, so that the invention of (7) is carried out.
【００２２】前記（８）及び（１３）の発明では、熱間
仕上げ圧延機を出た後の金属材料先端を上下１対以上の
ピンチロールで押さえながら搬送するので、フライン
グ、ウェービング等の搬送異常を防止できる。本来、Ｒ
ＯＴ冷却長は１００ｍ〜２００ｍ位長さがあり、捲き取
り機に捲き付きテンションを加える迄に数十メートルは
テンションが掛からず矯正されないので、温度偏差だけ
の影響では無い、圧延機出側の残留応力或いは形状の変
化も平坦度悪化原因に影響してしまう懸念がある。ま
た、ストリップの先端は圧延機から捲き取り機に向かっ
て圧延ロールによって送り出され、ホットランテーブル
の摩擦力によって搬送されるが、片持ちに状態のため先
端部はフライングやウェービンングを起こし設備に接触
し壊す懸念や、ストリップの変動によって正確な位置に
正確な入熱を与えることが出来ない懸念もある。そこ
で、これらの懸念に対し、圧延機とＲＯＴ冷却装置の間
にピンチロールを設置し、板のバタツキを抑えると共に
捲き取りテンションレベルのテンション加えることで解
決を図ろうとする、前記（８）及び（１３）の発明を実
施する。In the inventions (8) and (13), since the tip of the metal material after leaving the hot finishing rolling mill is transported while being held by one or more pairs of pinch rolls, abnormal transport such as flying and waving is caused. Can be prevented. Originally, R
The OT cooling length has a length of about 100 m to 200 m, and the tension is not applied for several tens of meters before the winding tension is applied to the winding machine, so that the tension is not corrected. There is a concern that a change in stress or shape may also affect the cause of deterioration in flatness. In addition, the end of the strip is sent out from the rolling mill to the take-up machine by a rolling roll, and is transported by the frictional force of the hot run table. There is also a concern that it may break, or that it may not be possible to give accurate heat input to an accurate location due to fluctuations in the strip. Therefore, in order to solve these concerns, a pinch roll is provided between the rolling mill and the ROT cooling device to suppress flapping of the plate and to add a tension at a winding tension level. The invention of 13) is carried out.
【００２３】[0023]
【実施例】本実施例について図を用いて説明する。本発
明者者らは、ＲＯＴ冷却前の鋼板の幅方向温度分布を均
一にするために、これまでの製造ラインの中に図１の仕
上げ圧延機１の後面にエッジ加熱装置としてエッジ入熱
装置６を新たに設置した。このエッジ入熱装置は、仕上
げ圧延機１を出た鋼板７の先端がピンチロール８を通過
後、鋼板をピンチし、２対のピンチロールでテンション
掛け、板のフライングやウェービングを抑え、その直後
より、エッジ１０mm部をＣＯ2 レーザーによる入熱装置
６にて入熱作業を行った。入熱作業の中でレーザーを用
いたので、入熱量４５kW、０．５m/s の場合には切断出
来るまで操作が可能で、この場合、そのままエッジドロ
ップによって所定の成品板厚になっていない部分をトリ
ミングすることができた。This embodiment will be described with reference to the drawings. In order to make the temperature distribution in the width direction of the steel sheet uniform before ROT cooling, the present inventors set an edge heat input device as an edge heating device on the rear surface of the finish rolling mill 1 in FIG. 6 was newly installed. This edge heat input device pinches the steel sheet after the tip of the steel sheet 7 exiting the finishing mill 1 passes the pinch roll 8 and applies tension with two pairs of pinch rolls to suppress flying and waving of the plate. Then, the heat input operation was performed on the edge 10 mm portion by the heat input device 6 using a CO 2 laser. Since the laser was used during the heat input work, the operation can be performed until cutting can be performed when the heat input is 45 kW and 0.5 m / s. In this case, the part that does not have the specified product thickness due to edge drop Could be trimmed.
【００２４】平坦度１．５％の耳波の発生率は１０００
コイル中ゼロであった。ピンチロール間のフライングウ
ェービング高さは５mmで、加熱操作や装置には悪影響を
及ぼす事は無くなった。比較例として、上記実施例の中
でエッジ入熱装置６を設けなかった場合には、平坦度
１．５％の耳波の発生率は１０００コイル中３５０であ
った。The generation rate of ear waves having a flatness of 1.5% is 1000.
It was zero in the coil. The flying waving height between the pinch rolls was 5 mm, and there was no adverse effect on the heating operation or the apparatus. As a comparative example, when the edge heat input device 6 was not provided in the above example, the generation rate of ear waves having a flatness of 1.5% was 350 out of 1,000 coils.
【００２５】[0025]
【発明の効果】本発明の方法によれば、熱延金属ストリ
ップの冷間平坦度を向上させることが可能となるため、
後工程で平坦度を向上させるスキンパスミルの工程を省
略することが可能となる。さらに、平坦度の悪化に伴う
板の蛇行や通板時の板の飛び跳ね現象を抑えることが出
来るので後工程の処理時間を短縮する事が出来る。ま
た、エッジトリミングも兼ねて実施すれば、熱延工程だ
けで成品が出来るので大幅なコスト削減が可能となる。According to the method of the present invention, the cold flatness of a hot-rolled metal strip can be improved.
It is possible to omit the step of skin pass mill for improving the flatness in a later step. Further, the meandering of the plate due to the deterioration of the flatness and the jumping of the plate at the time of passing the plate can be suppressed, so that the processing time in the post-process can be shortened. Further, if the edge trimming is also performed, the product can be formed only by the hot rolling process, so that the cost can be significantly reduced.
【図１】熱延鋼板の製造工程概略図及び本発明の実施例
を示した図である。FIG. 1 is a schematic view showing a manufacturing process of a hot-rolled steel sheet and an example of the present invention.
【図２】平坦度の定義を説明するための図である。FIG. 2 is a diagram for explaining the definition of flatness.
【図３】本発明の原理を検証したエッジ温度差と平坦度
の関係を示した図である。FIG. 3 is a diagram showing a relationship between an edge temperature difference and flatness for verifying the principle of the present invention.
【図４】本発明の工程概要図を示した図である。FIG. 4 is a diagram showing a process outline diagram of the present invention.
１ 圧延機 ２ ランアウトテーブル ３ ＲＯＴ冷却装置 ４ コイラー ５ 温度計 ６ エッジ入熱装置 ７ 鋼板 ８ ピンチロール Ｈ 波高さ Ｌ 波のピッチ REFERENCE SIGNS LIST 1 rolling mill 2 run-out table 3 ROT cooling device 4 coiler 5 thermometer 6 edge heat input device 7 steel plate 8 pinch roll H wave height L wave pitch
───────────────────────────────────────────────────── フロントページの続き (72)発明者 芹澤 良洋 千葉県富津市新富20−１ 新日本製鐵株式 会社技術開発本部内 (72)発明者 是枝 源一 福岡県北九州市戸畑区大字中原46−59 日 鐵プラント設計株式会社内 Ｆターム(参考） 4E003 AA02 BA24 BA25 DA01 DA04 4E024 AA02 FF10 4E026 AA03 AA15 EA02 EA09 EA13 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshihiro Serizawa, Inventor 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Division (72) Inventor Genichi Koeda 46-46, Nakahara, Ogata, Tobata-ku, Kitakyushu, Fukuoka 59 Nippon Steel Plant Design Co., Ltd. F-term (reference) 4E003 AA02 BA24 BA25 DA01 DA04 4E024 AA02 FF10 4E026 AA03 AA15 EA02 EA09 EA13
Claims (14)
ジ部を加熱し、その後、水冷却及び／又は熱間矯正を行
うことを特徴とする金属板の平坦度制御方法。1. A flatness control method for a metal plate, comprising: after completion of hot rolling, heating a width edge portion of the metal plate, and thereafter performing water cooling and / or hot straightening.
い、金属板の幅エッジ部を加熱し、その後、放冷又は水
冷却することを特徴とする金属板の平坦度制御方法。2. A flatness control method for a metal plate, comprising: performing hot straightening after completion of hot rolling, heating a width edge portion of the metal plate, and then allowing the metal plate to be cooled or cooled with water.
後金属板を巻き取ることを特徴とする請求項１記載の金
属板の平坦度制御方法。3. The method for controlling flatness of a metal plate according to claim 1, wherein the water cooling is ROT cooling, and the metal plate is wound after the ROT cooling.
放冷することを特徴とする請求項１記載の金属板の平坦
度制御方法。4. The method for controlling flatness of a metal plate according to claim 1, wherein the metal plate is allowed to cool after water cooling and / or hot straightening.
ジ部を加熱する前に金属板の表面温度を測定し、当該測
定温度に基づいて金属板幅エッジ部の加熱温度を制御す
ることを特徴とする請求項１〜４の何れか１項に記載の
金属板の平坦度制御方法。5. After completing hot rolling, measure the surface temperature of the metal plate before heating the width edge of the metal plate, and control the heating temperature of the metal plate width edge based on the measured temperature. The flatness control method for a metal plate according to any one of claims 1 to 4, wherein:
属板表面幅中央部と幅エッジ部の温度差を５０℃以内と
することを特徴とする請求項１〜５の何れか１項に記載
の金属板の平坦度制御方法。6. The method according to claim 1, wherein, when heating the width edge portion of the metal plate, a temperature difference between a center portion and a width edge portion of the surface width of the metal plate is set to 50 ° C. or less. Item 4. The flatness control method for a metal plate according to item 1.
の幅エッジ部を加熱することに加え、エッジ部をトリミ
ングすることを特徴とする請求項１〜６の何れか１項に
記載の金属板の平坦度制御方法。7. The metal according to claim 1, wherein the edge portion is trimmed in addition to heating the width edge portion of the metal plate using a laser irradiation heating device. Plate flatness control method.
て、次に上下１対或いは２対のピンチロールを通過した
のちに当該ピンチロールで金属板を押さえながら搬送す
ることを特徴とする請求項１〜７の何れか１項に記載の
金属板の平坦度制御方法。8. The method according to claim 1, wherein the tip of the metal sheet exits the hot finishing rolling mill and then passes through one or two pairs of pinch rolls, and then conveys the metal sheet while holding the metal sheet with the pinch rolls. The method for controlling flatness of a metal plate according to claim 1.
は熱間矯正機の間に金属板幅エッジ部加熱装置を有する
ことを特徴とする金属板の平坦度制御装置。9. A flatness control device for a metal plate, comprising a metal plate width edge heating device between a hot finishing mill and a water cooling device and / or a hot straightening device.
間矯正機の後に金属板幅エッジ部加熱装置を有すること
を特徴とする金属板の平坦度制御装置。10. A flatness control device for a metal plate, comprising a metal plate width edge heating device after a hot straightening machine disposed after a hot finishing rolling mill.
冷却装置を有することを特徴とする請求項１０記載の金
属板の平坦度制御装置。11. The flatness control device for a metal plate according to claim 10, further comprising a control cooling device after the metal plate width edge portion heating device.
加熱装置の間に金属板表面温度測定装置を有することを
特徴とする請求項９〜１１の何れか１項に記載の金属板
の平坦度制御装置。12. The metal sheet according to claim 9, further comprising a metal sheet surface temperature measuring device between the hot finishing mill and the metal sheet edge heating device. Flatness control device.
加熱装置の間に少なくとも上下１対のピンチロールを有
することを特徴とする請求項９又は１２記載の金属板の
平坦度制御装置。13. The flatness control apparatus for a metal sheet according to claim 9, wherein at least one pair of upper and lower pinch rolls is provided between the hot finishing mill and the apparatus for heating the edge portion of the metal sheet width.
熱装置、レーザー照射加熱装置、プラズマ照射加熱装置
又はガス燃焼加熱装置であることを特徴とする特徴とす
る請求項９〜１３の何れか１項に記載の金属板の平坦度
制御装置。14. The metal plate width edge portion heating device is an induction heating device, a laser irradiation heating device, a plasma irradiation heating device or a gas combustion heating device. Item 2. The flatness control device for a metal plate according to item 1.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32768499A JP2001137943A (en) | 1999-11-18 | 1999-11-18 | Method and device for controlling flatness of metallic sheet |
| US09/889,614 US6615633B1 (en) | 1999-11-18 | 2000-03-17 | Metal plateness controlling method and device |
| AU14143/01A AU760833B2 (en) | 1999-11-18 | 2000-11-16 | Metal plate flatness controlling method and device |
| EP00976298A EP1153673B1 (en) | 1999-11-18 | 2000-11-16 | Metal plate flatness controlling method |
| DE60039102T DE60039102D1 (en) | 1999-11-18 | 2000-11-16 | METHOD FOR REGULATING THE PLANNING OF METAL PLATES |
| KR10-2001-7008993A KR100432682B1 (en) | 1999-11-18 | 2000-11-16 | Metal plate flatness controlling method and device |
| PCT/JP2000/008093 WO2001036122A1 (en) | 1999-11-18 | 2000-11-16 | Metal plate flatness controlling method and device |
| CNB008028974A CN1278792C (en) | 1999-11-18 | 2000-11-16 | Metal plate flatness controlling method and device |
| MXPA01007250A MXPA01007250A (en) | 1999-11-18 | 2000-11-16 | Metal plate flatness controlling method and device. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32768499A JP2001137943A (en) | 1999-11-18 | 1999-11-18 | Method and device for controlling flatness of metallic sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001137943A true JP2001137943A (en) | 2001-05-22 |
Family
ID=18201831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32768499A Pending JP2001137943A (en) | 1999-11-18 | 1999-11-18 | Method and device for controlling flatness of metallic sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001137943A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008248342A (en) * | 2007-03-30 | 2008-10-16 | Kobe Steel Ltd | Respective manufacturing methods of aluminum-alloy sheet material, sheet and formed member |
| WO2009024644A1 (en) * | 2007-08-17 | 2009-02-26 | Outokumpu Oyj | Method and equipment of flatness control in cooling a stainless steel strip |
| CN103157671A (en) * | 2013-03-16 | 2013-06-19 | 南阳汉冶特钢有限公司 | Method of improving steel plate quality |
| CN112605156A (en) * | 2021-01-15 | 2021-04-06 | 安阳钢铁股份有限公司 | Method for improving flatness of hot continuous rolling thin-specification checkered plate |
| CN113319130A (en) * | 2021-06-29 | 2021-08-31 | 燕山大学 | Continuous rolling plate temperature control method and device |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5695404A (en) * | 1979-12-28 | 1981-08-01 | Kawasaki Steel Corp | Manufacture of flat steel sheet |
| JPS6293028A (en) * | 1985-10-21 | 1987-04-28 | Mitsubishi Electric Corp | Bending method for plate stock by laser |
| JPS63126608A (en) * | 1986-11-18 | 1988-05-30 | Sumitomo Metal Ind Ltd | Induction heater for thick plate production line |
| JPH02187210A (en) * | 1989-01-12 | 1990-07-23 | Toshiba Corp | Device for transferring rolled stock |
| JPH03175001A (en) * | 1989-12-05 | 1991-07-30 | Romatetsuku Kk | Device for removing strain of band saw |
| JPH06254616A (en) * | 1993-03-05 | 1994-09-13 | Nippon Steel Corp | Manufacture of thick steel plate excellent in shape and device therefor |
| JPH07132307A (en) * | 1993-11-12 | 1995-05-23 | Sumitomo Metal Ind Ltd | Correcting device of edge shape of sheet metal |
| JPH0871628A (en) * | 1994-09-02 | 1996-03-19 | Nippon Steel Corp | Method for preventing generation of ear waving of steel plate |
| JPH08509168A (en) * | 1993-02-11 | 1996-10-01 | アングロ アメリカン インダストリアル コーポレーション リミティッド | Manufacture of metal pieces |
| JPH09225531A (en) * | 1996-02-21 | 1997-09-02 | Kawasaki Steel Corp | Roller leveler for thick steel plate |
| JPH11290946A (en) * | 1998-04-16 | 1999-10-26 | Nippon Steel Corp | Method for straightening thick steel plate |
-
1999
- 1999-11-18 JP JP32768499A patent/JP2001137943A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5695404A (en) * | 1979-12-28 | 1981-08-01 | Kawasaki Steel Corp | Manufacture of flat steel sheet |
| JPS6293028A (en) * | 1985-10-21 | 1987-04-28 | Mitsubishi Electric Corp | Bending method for plate stock by laser |
| JPS63126608A (en) * | 1986-11-18 | 1988-05-30 | Sumitomo Metal Ind Ltd | Induction heater for thick plate production line |
| JPH02187210A (en) * | 1989-01-12 | 1990-07-23 | Toshiba Corp | Device for transferring rolled stock |
| JPH03175001A (en) * | 1989-12-05 | 1991-07-30 | Romatetsuku Kk | Device for removing strain of band saw |
| JPH08509168A (en) * | 1993-02-11 | 1996-10-01 | アングロ アメリカン インダストリアル コーポレーション リミティッド | Manufacture of metal pieces |
| JPH06254616A (en) * | 1993-03-05 | 1994-09-13 | Nippon Steel Corp | Manufacture of thick steel plate excellent in shape and device therefor |
| JPH07132307A (en) * | 1993-11-12 | 1995-05-23 | Sumitomo Metal Ind Ltd | Correcting device of edge shape of sheet metal |
| JPH0871628A (en) * | 1994-09-02 | 1996-03-19 | Nippon Steel Corp | Method for preventing generation of ear waving of steel plate |
| JPH09225531A (en) * | 1996-02-21 | 1997-09-02 | Kawasaki Steel Corp | Roller leveler for thick steel plate |
| JPH11290946A (en) * | 1998-04-16 | 1999-10-26 | Nippon Steel Corp | Method for straightening thick steel plate |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008248342A (en) * | 2007-03-30 | 2008-10-16 | Kobe Steel Ltd | Respective manufacturing methods of aluminum-alloy sheet material, sheet and formed member |
| WO2009024644A1 (en) * | 2007-08-17 | 2009-02-26 | Outokumpu Oyj | Method and equipment of flatness control in cooling a stainless steel strip |
| CN103157671A (en) * | 2013-03-16 | 2013-06-19 | 南阳汉冶特钢有限公司 | Method of improving steel plate quality |
| CN112605156A (en) * | 2021-01-15 | 2021-04-06 | 安阳钢铁股份有限公司 | Method for improving flatness of hot continuous rolling thin-specification checkered plate |
| CN112605156B (en) * | 2021-01-15 | 2023-03-10 | 安阳钢铁股份有限公司 | Method for improving flatness of hot continuous rolling thin-specification checkered plate |
| CN113319130A (en) * | 2021-06-29 | 2021-08-31 | 燕山大学 | Continuous rolling plate temperature control method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100432682B1 (en) | Metal plate flatness controlling method and device | |
| KR101185597B1 (en) | Method of continuous annealing for steel strip with curie point and continuous annealing apparatus therefor | |
| JP2007216246A (en) | Method for controlling shape of metal strip in hot rolling | |
| JP5217543B2 (en) | Continuous annealing method and continuous annealing equipment for steel strip with Curie point | |
| JP2010005655A (en) | Method and equipment for manufacturing hot-rolled steel plate | |
| JP4392115B2 (en) | Method and apparatus for controlling flatness of metal plate | |
| JP2001137943A (en) | Method and device for controlling flatness of metallic sheet | |
| JP7311764B2 (en) | Cold tandem rolling equipment and cold tandem rolling method | |
| Mazur et al. | Efficient cold rolling and coiling modes | |
| JP5217542B2 (en) | Continuous annealing method and continuous annealing equipment for steel strip with Curie point | |
| JP4018572B2 (en) | Manufacturing method of steel sheet with small variation in yield stress and residual stress | |
| JP2016107280A (en) | Shape control method and shape control device for metal strip | |
| JP4109407B2 (en) | Method and apparatus for controlling flatness of metal plate | |
| JP2001239312A (en) | Method and apparatus for controlling evenness of metal plate | |
| JPH06254615A (en) | Manufacture of thick steel plate excellent in shape and device therefor | |
| JP2016163894A (en) | Control method of rolling mill, control device of rolling mill, and manufacturing method of steel plate | |
| JPH08300040A (en) | Straightening method of thick steel plate | |
| JPH06254616A (en) | Manufacture of thick steel plate excellent in shape and device therefor | |
| JP4065251B2 (en) | Hot finish rolling method that prevents drawing wrinkles | |
| JP3684942B2 (en) | Cold rolled steel strip manufacturing method | |
| JP3351239B2 (en) | Hot-rolled steel strip rolling method and apparatus | |
| JP2004261838A (en) | Method for manufacturing steel plate to be divided in hot rolling mill line, steel plate to be divided, apparatus, computer program and computer-readable recording medium | |
| JP3298819B2 (en) | Prediction method of shrinkage of sheet width in continuous heat treatment furnace for metal strip | |
| JP4617956B2 (en) | Target thickness setting method during hot rolling | |
| JPH11169910A (en) | Manufacture of hot rolled steel sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040219 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060809 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20061010 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070529 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070730 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20080304 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080507 |
|
| A911 | Transfer of reconsideration by examiner before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20080512 |
|
| A912 | Removal of reconsideration by examiner before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A912 Effective date: 20090703 |