JP2004017094A - Method and table for correcting coil of metallic band - Google Patents

Method and table for correcting coil of metallic band Download PDF

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Publication number
JP2004017094A
JP2004017094A JP2002175652A JP2002175652A JP2004017094A JP 2004017094 A JP2004017094 A JP 2004017094A JP 2002175652 A JP2002175652 A JP 2002175652A JP 2002175652 A JP2002175652 A JP 2002175652A JP 2004017094 A JP2004017094 A JP 2004017094A
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Japan
Prior art keywords
coil
metal band
band coil
support
metal
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JP2002175652A
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Japanese (ja)
Inventor
Hajime Nagai
永井 肇
Masaichirou Misuno
御簾納 雅一郎
Yukio Ogasawara
小笠原 幸雄
Noriyoshi Hashimoto
橋本 紀芳
Takeyuki Nagashima
永島 武幸
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JFE Steel Corp
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JFE Steel Corp
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Priority to JP2002175652A priority Critical patent/JP2004017094A/en
Publication of JP2004017094A publication Critical patent/JP2004017094A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a table for correcting the deformation of the coil of a metallic band and reducing the difference of the center height of the coil of the metallic band after correction in spite of the difference in the outside diameter of the coil of the metallic band. <P>SOLUTION: The correcting table 1 for the coil 50 of the metallic band is provided with a pair of support bases 20 and has sliding devices 30 each of which is constituted so that the interval between mutual support bases 20 is changeable. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、変形した金属帯コイルを矯正する方法及びこの矯正方法で使用する台に関するものである。
【0002】
【従来の技術】
従来、製造工程において製造された冷延鋼帯等の金属帯は、巻取リールを用いてコイル状に巻き取られて冷延鋼帯コイル等の金属帯コイルの製品となり、この金属帯コイルを次の工程や需要家等に送る。そして、次の工程や需要家等において払出リールのマンドレルを金属帯コイルに挿入し、冷延鋼帯等の金属帯を払い出している。
【0003】
しかし、不適切な張力を金属帯に与えてコイル状に巻き取って金属帯コイルとしたり、運搬するときに金属帯コイルに衝撃が加わることがあり、金属帯コイルのコイル内側形状が円形から略楕円形に変形してしまうことがある。コイル内側形状が変形すると、払出リールのマンドレルを金属帯コイルに挿入して金属帯を払い出すことが困難となる。
【0004】
このような冷延鋼帯コイル等の金属帯コイルのコイル内側形状の変形を矯正する第1従来技術として、図8に示す方法がある。この方法では、床上に2本の棒状部材を平行に固定設置して支持台20とする。そして、変形した金属帯コイル50の略楕円形断面の長軸と鉛直線とをほぼ一致させて、かつ、金属帯コイル50の軸方向と支持台20の軸方向を平行にし、金属帯コイル50を2本の支持台20で支承し、金属帯コイル50を自重によって鉛直方向に押しつぶし、コイル内側形状を円形に矯正する。
【0005】
また、特開昭56−23233号公報には、熱間圧延コイルの冷却処理方法の発明(第2従来技術)が記載されている。第2従来技術では、40度ないし50度の傾斜板を対抗配置した略V型の変形防止台に熱間圧延コイルを載置し、熱間圧延コイルの変形を矯正しつつ冷却する。この第2従来技術を用いて、コイル内側形状が変形した冷延鋼帯コイル等の金属帯コイルを矯正することも可能である。
【0006】
さらに、金属帯コイルが不適切な張力下でコイル状に巻き取られて変形しているときは、その金属帯コイルの変形を矯正した後に運送を開始すると、再び変形が生じることが多い。矯正後に金属帯コイルが再変形することを防止する第3従来技術として、図9に示すように、矯正後の金属帯コイル50のコイル内側に支持器52を挿入し、この支持器52によって金属帯コイル50のコイル内側形状の変形を防止する方法がある。
【0007】
【発明が解決しようとする課題】
しかしながら、第1従来技術にあっては、金属帯コイルを単に床上に設置した2本の棒状部材で支承することにより変形を矯正するだけであり、払出リールのマンドレルに挿入する等、変形を矯正した後に金属帯コイルを移動する際に、再び金属帯コイルの内径に変形を生じる場合があった。
【0008】
また、第2従来技術にあっては、変形防止台を移動可能とすることにより、変形防止台上で金属帯コイルを支承して変形を矯正したままの状態で、払出リールのマンドレルを変形を矯正した後の金属帯コイルに挿入することができる。しかしながら、変形防止台上の金属帯コイルの中心高さは、金属帯コイルの外径によって異なる。したがって、払出リールのマンドレルを金属帯コイルに挿入するために、金属帯コイルの中心高さを払出リールのマンドレルの高さまで昇降装置によって昇降させなければならない。取り扱う金属帯コイルの外径サイズが幅広く変化する場合、各金属帯コイルをそれぞれ昇降させる距離が大きくなり、昇降装置が大型化するという不都合があった。
【0009】
さらに、第3従来技術にあっては、再変形しようとする金属帯コイルのコイル内側が支持器を強い力で押圧して、支持器の除去が困難となるという不都合があった。また、払出リールのマンドレルを金属帯コイルに挿入している途中で支持器が外れてしまうと、コイル内側形状が変形してマンドレルを挟み込んでしまい、マンドレルを金属帯コイルに挿入することも抜き出すこともできなくなるという不都合があった。
【0010】
本発明は、上記した従来の技術の問題点を除くためになされたものであり、その目的とするところは、払出リールのマンドレルを金属帯コイルに挿入する前に金属帯コイルの変形を矯正し、金属帯コイルの外径の違いに拘らず、矯正後の各金属帯コイルの中心の高さの相違が小さくなる金属帯コイル矯正方法及び金属帯コイル矯正台を提供することである。
【0011】
【課題を解決するための手段】
本発明は、その課題を解決するために以下のような構成をとる。請求項1の発明は、対をなす支持台を、当該支持台同士の間隔を変更可能に構成し、この対をなす支持台にて金属帯コイルを支承することを特徴とする金属帯コイル矯正方法である。
【0012】
請求項1の発明によると、断面形状が楕円形に変形した金属帯コイルを1対の支持台で支承すると、金属帯コイルは支持台から受ける反力によって変形し、その断面形状はほぼ真円となる。また、支持台同士の間隔を広げると、金属帯コイルは支持台の間で下方へ移動し、支持台同士の間隔を狭めると、金属帯コイルは支持台の間で上方へ移動する。したがって、支持台同士の間隔を変えることにより、支持台に対する金属帯コイルの中心の高さが変わり、金属帯コイルの中心高さを調整することができる。
【0013】
請求項2の発明は、請求項1に記載の金属帯コイル矯正方法であって、金属帯コイルの外径が大きな場合には前記支持台同士の間隔を広げて当該金属帯コイルの中心の高さを下げ、金属帯コイルの外径が小さな場合には前記支持台同士の間隔を狭めて当該金属帯コイルの中心の高さを上げることを特徴とする金属帯コイル矯正方法である。
【0014】
請求項2の発明によると、金属帯コイルの外径が大きな場合、支持台同士の間隔を広げ、支持台に対する金属帯コイルの中心の高さを下げる。また、金属帯コイルの外径が小さな場合、前記支持台同士の間隔を狭め、支持台に対する金属帯コイルの中心の高さを上げる。したがって、金属帯コイルの外径が大きな場合と小さな場合とにおいて、支持台に対するそれぞれの金属帯コイルの中心の高さの相違が小さくなる。
【0015】
請求項3の発明は、請求項1または請求項2に記載の金属帯コイル矯正方法であって、前記対をなす支持台がそれぞれ金属帯コイルの外周面と接触する部位の間の距離を、前記支持台が支承する金属帯コイルの外径の0.59倍〜0.74倍とすることを特徴とする金属帯コイル矯正方法である。
請求項3の発明によると、支持台がそれぞれ金属帯コイルの外周面と接触する部位の間の距離を、前記支持台が支承する金属帯コイルの外径の0.59倍〜0.74倍とし、金属帯コイルの断面形状はほぼ真円に矯正される。この距離を、支持台が支承する金属帯コイルの外径の0.59倍より小さくすると、金属帯コイルが支持台より受ける水平方向の反力が小さく、金属帯コイルの変形した断面形状はほぼ真円まで戻らない。また、この距離を、支持台が支承する金属帯コイルの外径の0.74倍よりも大きくすると、金属帯コイルが支持台に及ぼす水平方向の力が急激に大きくなり、支持台同士の間隔を広げようとする力が大きくなりすぎ、支持台同士の位置関係の維持が困難となる。
【0016】
なお、支持台がそれぞれ金属帯コイルの外周面と接触する部位の間の距離が、支持台が支承する金属帯コイルの外径の0.59倍〜0.74倍であるとき、金属帯コイルの外周面が各支持台と接触する部位における各接平面の法線同士の交差角度は72度〜95度となる。
請求項4の発明は、対をなす支持台を備え、当該支持台同士の間隔を変更可能に構成したことを特徴とする金属帯コイル矯正台である。
【0017】
請求項4の発明によると、断面形状が変形した金属帯コイルを対をなす支持台上に支承し、請求項1に記載の方法を用い、その断面形状はほぼ真円に矯正される。また、支持台同士の間隔を変えると、支持台に対する金属帯コイルの中心の高さも変わる。
請求項5の発明は、請求項4に記載の金属帯コイル矯正台であって、少なくとも一方の前記支持台が金属帯コイルの外周面と接触する部位を、他方の支持台に近づくにつれて下方へ向かう傾斜面により形成したことを特徴とする金属帯コイル矯正台である。
【0018】
請求項5の発明によると、支持台の傾斜面を平面で形成する場合、傾斜面全体にわたってその法線方向は同じ向きであり、この傾斜面と接触する金属帯コイルの外周面上の位置は常に同一の場所である。このため、支持台がそれぞれ金属帯コイルの外周面と接触する部位の間の距離は、支持台の傾斜面の傾斜角度と金属帯コイルの外径によって定まる。そして、支持台に対する金属帯コイルの中心の高さは、支持台同士の間隔によって決まる。
【0019】
また、支持台の傾斜面を湾曲面で形成する場合、金属帯コイルの外周面と接触する支持台の湾曲面の法線方向は、湾曲面の部位によって異なる。このため、支持台と接触する金属帯コイルの外周面の位置も一定せず、支持台がそれぞれ金属帯コイルの外周面と接触する部位の間の間隔も一定とはならない。したがって、対をなす支持台の間隔を調整すると、支持台がそれぞれ金属帯コイルの外周面と接触する部位の間の距離も調整される。なお、湾曲面とは、たとえば円柱の側面などである。
【0020】
【発明の実施の形態】
本発明の第1の実施の形態を図面に基づいて説明する。
まず、図1を参照して本実施の形態の構成を説明する。
図1に示すように、基台10、スライド装置30、支持台20とからなる金属帯コイル矯正台1がある。基台10は床面上に設置されており、基台10の上面12はテーブル状をなす。この上面12の左右両側(図1において左右の側)に、それぞれスライド装置30が設置してあり、さらに、各スライド装置30の上に支持台20をそれぞれ設置してある。各支持台20は円形の断面が軸方向に連続する円柱の形状を有し、各スライド装置30上の各支持台20は互いに平行に位置して対をなしている。また、円中の側面22上にはゴム材が貼り付けられており、支持台20に支承される金属帯コイル50の外周面の損傷を防止する構成となっている。
【0021】
また、スライド装置30は、各支持台20を互いに平行な状態を維持して、支持台20の間の間隔を変更し、この間隔を保持可能な構成を有する。また、基台10は図示しない昇降装置を備え、床面から支持台20までの高さを調節可能な構成を有する。
本実施の形態は上記のように構成されており、次にその作用について説明する。
【0022】
まず、断面が楕円形に変形した金属帯コイル50の軸方向と支持台20の軸方向を同じ向きとし、金属帯コイル50の楕円形断面の短軸と鉛直線とをほぼ一致させ、金属帯コイル50を2つの支持台20の間に支承する。金属帯コイル50の外周面が各支持台20の面22と接触し、面22へ金属帯コイル50の重量が作用し、面22から金属帯コイル50の中心方向に反力frが作用する。
【0023】
図2(i)に示すように、金属帯コイル50を支持台20に載せた当初は、面22からの反力frの水平方向成分frhは大きい。この水平方向成分frhが変形復元力として金属帯コイル50に作用し、金属帯コイル50の断面形状は楕円から円形へ変形する。図2(ii)に示すように、金属帯コイル50の断面形状が円形に矯正されていくに連れて、面22からの反力frの水平方向成分frhは小さくなる。そして、金属帯コイル50の断面形状がほぼ真円となると、面22からの反力frは最小となり、金属帯コイル50の断面形状の変形は停止する。
【0024】
なお、対をなす支持台20がそれぞれ金属帯コイル50の外周面と接触する部位の間の距離である距離L、すなわち、各支持台20の面22が金属帯コイル50の外周面と接触する部位の間の距離Lを、金属帯コイル50の外径の0.59倍〜0.74倍とすることが好ましい。ここで、図3に、距離Lと、金属帯コイル50が支持台20から受ける水平方向成分反力frhとの関係を示す。縦軸には(支持台20から金属帯コイル50が受ける反力fr)/(金属帯コイル50の重量×0.5)の値をとり(以下、「(支持台20から金属帯コイル50が受ける反力fr)/(金属帯コイル50の重量×0.5)の値」を反力係数という。)、反力frの相対的大きさを無次元化して表している。また、横軸には(距離L)/(金属帯コイル50の外径)の値をとり(以下、「(距離L)/(金属帯コイル50の外径)の値」を間隔係数という。)、金属帯コイル50の外径に対する距離Lの相対的大きさを無次元化して表している。
【0025】
図3より、間隔係数が0.74を越えると、反力係数が急激に大きくなることがわかる。すなわち、間隔係数が0.74を越える条件下では、反力係数に見合った大きさの力をスライド装置30は支持台20から受けるので、スライド装置30を大型化してこの力に耐えられるようにしなければならない。また、間隔係数が小さくなるに連れて反力係数も小さくなる。間隔係数が0.59よりも小さくなると、金属帯コイル50に働く反力frの水平方向成分frhも小さくなり、金属帯コイル50を楕円形の断面形状からほぼ真円の断面形状まで矯正することができない。したがって、間隔係数を0.59倍〜0.74倍とすることで、スライド装置30を大掛かりなものとすることなく、金属帯コイル50の変形を矯正できる。
【0026】
また、異なる外径の金属帯コイル50を金属帯コイル矯正台1で矯正する場合、支持台20の間隔を金属帯コイル50の外径に応じて変化させ、距離Lを変える。例えば、間隔係数を0.74に選定し、大きな外径の金属帯コイル50を矯正するときは距離Lを大きくし、小さな外径の金属帯コイル50を矯正するときは距離Lを小さくすることとなる。
【0027】
また、距離Lを大きくすると、支持台20の高さに対して金属帯コイル50の下端はより下方に下がり、距離Lを小さくすると、支持台20の高さに対して金属帯コイル50の下端はより上方に上がる(図4(i)、(ii)を参照)。したがって、支持台20の高さ位置に対して、大きな外径の金属帯コイル50の中心の高さ位置は下方に下がり、小さな外径の金属帯コイル50の中心の高さ位置は上方に上がる。
【0028】
さらに、距離Lを調整するに当たり、間隔係数を一定とせず、大きな外径の金属帯コイル50の場合には間隔係数を大きくして0.74に近づけ、小さな外径の金属帯コイル50の場合には間隔係数を小さくして0.59に近づけることもできる。間隔係数を変化させると、大きな外径の金属帯コイル50の中心の高さ位置は一層下方に下がり、小さな外径の金属帯コイル50の中心の高さ位置は一層上方に上がる。
【0029】
一方、距離Lを変化させないで異なる外径の金属帯コイル50を支承するときは、大きな外径の金属帯コイル50の下端の高さ位置は、小さな外径の金属帯コイル50の下端の高さ位置よりも高くなっている。このため、支持台20の高さ位置に対して、大きな外径の金属帯コイル50の中心の高さ位置は上方に上がり、小さな外径の金属帯コイル50の中心の高さ位置は下方に下がる。
【0030】
したがって、距離Lを一定に固定した場合と比べ、距離Lを金属帯コイル50の外径に応じて変化させた場合のほうが、各金属帯コイル50の中心の高さ位置の差は小さなものとなる。さらに、距離Lとともに間隔係数を変化させると、この差は一層小さなものとなる。すなわち、支持台20同士の間隔を変え、必要に応じて間隔係数をも変えることによって、変形を矯正した後の金属帯コイル50の中心に払出リールのマンドレルを挿入するため、各金属帯コイル50を昇降させて調整しなければならない高さ位置の量はより小さなものとなる。このため、前記昇降装置を大型化する必要はない。
【0031】
よって、本実施の形態に係る金属帯コイル矯正台1によって、スライド装置30にかかる力を小さくし、スライド装置30に大きな力が作用して損傷することを防ぐことができ、昇降装置を大型化して金属帯コイルの中心の高さ位置を調整する必要もなく、金属帯コイル矯正台のコストを低廉なものとできる。
次に、本発明の第2の実施の形態を図面に基づいて説明する。なお、第1の実施の形態と同様の構成については、同じ符号を付して重複する説明を省略する。
【0032】
まず、図5を参照して本実施の形態の構成を説明する。本実施の形態における金属帯コイル矯正台1は、第1の実施の形態における金属帯コイル矯正台1と支持台20の形状が異なる他は同様の構成を備える。支持台20は直角二等辺三角形の断面が軸方向に連続する三角柱の形状を有する。各支持台20の断面をなす直角二等辺三角形の斜辺が連続してなる面22が、基台上面12の内側斜め上方を向いている。そして、面22上にはゴム材が貼り付けられている。
【0033】
本実施の形態は上記のように構成されており、次にその作用について説明する。なお、第1の実施の形態と同様の構成による同様の作用についてはその説明を省略する。
支持台20の面22の法線方向は、面22全体にわたって同じであり、支持台20同士の間隔に関係なく面22と接触する金属帯コイル50の外周面の位置は常に同一の場所であり、間隔係数も一定の値となる。したがって、面22の傾斜角度を変えて、面22の法線方向を変えると、面22と接触する金属帯コイル50の外周面の位置も変わり、間隔係数も変わり、間隔係数を0.59倍〜0.74倍とすることができる。
【0034】
また、図6(i)、(ii)に示すように、支持台20の間隔を広げると、金属帯コイル50の外周面と接触している面22上の位置は下方に下がり、金属帯コイル50の中心の高さ位置も下がる。また、支持台20の間隔を狭めると、金属帯コイル50の外周面と接触する面22上の位置は上方に上がり、金属帯コイル50の中心の高さ位置も上がる。
【0035】
したがって、大きな外径の金属帯コイル50を支承するときは、支持台20同士の間隔を広げて、金属帯コイル50の中心の高さ位置を低くし、小さな外径の金属帯コイル50を支承するときは、支持台20同士の間隔を狭めて、金属帯コイル50の中心の高さ位置を高くする。これによって、外径が異なる各金属帯コイル50の中心の高さ位置の差はより小さなものとなり、基台10が有する昇降装置を大型のものとする必要はない。
【0036】
よって、本実施の形態に係る金属帯コイル矯正台1は、第1の実施の形態の場合と同様の効果を有する。
次に、図7に示すように、第2の実施の形態で説明した金属帯コイル矯正台1において、支持台20の間隔を一定に固定して動かさない場合(比較例)と、第1の実施の形態に係る金属帯コイル矯正台1において、支持台20の間隔を調整して動かした場合(本発明例)とで、支持台20の下部から金属帯コイル50の中心までの高さを比較した。図7の横軸には金属帯コイル50の外径をとり、縦軸には支持台20の下部から金属帯コイル50の中心までの高さをとった。なお、両場合とも間隔係数は0.74とし、第2の実施の形態に係る金属帯コイル矯正台1の支持台20の面22は45度の傾斜面とした。また、比較のため、両場合とも金属帯コイル50の外径が800mmのときは、金属帯コイル50の中心までの高さを同じ高さとした。
【0037】
図7より、外径が800mmの金属帯コイルと外径が3000mmの金属帯コイルとの中心の高さの差を各場合で比較すると、比較例における中心の高さの差は、本発明例における中心の高さの差よりも、約750mm大きいことがわかる。すなわち、支持台20の間隔を調整して動かすと、各金属帯コイル50の中心の高さ位置の差が小さいことがわかる。
【0038】
なお、上記各実施の形態において、各支持台20を円柱形、三角柱形としたが他の形状とすることが可能であることは勿論である。たとえば、球体を並べて各支持台を形成することも可能である。
また、上記各実施の形態において、スライド装置30を基台10の上面12の左右両側に設けるとしたが、一方の側にのみスライド装置を設けて、一方の支持台を基台上面に固定することも可能である。
さらに、上記各実施の形態において、支持台20の面22にゴム材を貼り付けるとしたが、ゴム材に限定されるものでないことは勿論である。
【0039】
【発明の効果】
本発明は、上記のような金属帯コイル矯正方法及び金属帯コイル矯正台であるので、以下のような効果がある。すなわち、金属帯コイルの変形を矯正でき、金属帯コイルの外径の違いに拘らず矯正後の金属帯コイルの中心の高さの相違が小さくなる金属帯コイル矯正方法及び金属帯コイル矯正台を提供できるという効果がある。
【図面の簡単な説明】
【図1】第1の実施の形態に係る金属帯コイル矯正台を示す正面図である。
【図2】変形した金属帯コイルに作用する力を示す説明図である。
【図3】間隔係数と反力係数の関係図である。
【図4】第1の実施の形態における距離Lと金属帯コイルの位置の関係を示す説明図である。
【図5】第2の実施の形態に係る金属帯コイル矯正台を示す正面図である。
【図6】第2の実施の形態における距離Lと金属帯コイルの位置の関係を示す説明図である。
【図7】金属帯コイルの外径と金属帯コイルの中心の高さ位置の関係を示す説明図である。
【図8】第1従来技術にかかる金属帯コイルの矯正方法の説明図である。
【図9】第3従来技術にかかる金属帯コイルの変形防止方法の説明図である。
【符号の説明】
1 金属帯コイル矯正台
10 基台
12 基台上面
20 支持台
22 支持台側面
30 スライド装置
50 金属帯コイル
52 支持器
fr 反力
frh 反力の水平方向成分
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for straightening a deformed metal strip coil and a table used in the straightening method.
[0002]
[Prior art]
Conventionally, a metal strip such as a cold-rolled steel strip manufactured in a manufacturing process is wound into a coil shape using a take-up reel, and becomes a product of a metal strip coil such as a cold-rolled steel strip coil. Send it to the next process or customer. Then, in the next step or in the customer, the mandrel of the payout reel is inserted into the metal band coil, and the metal band such as the cold rolled steel band is paid out.
[0003]
However, improper tension may be applied to the metal strip to wind it into a coil to form a metal strip coil, or a shock may be applied to the metal strip coil during transportation. It may be transformed into an elliptical shape. If the inner shape of the coil is deformed, it becomes difficult to insert the mandrel of the payout reel into the metal band coil to pay out the metal band.
[0004]
As a first conventional technique for correcting the deformation of the inside shape of a metal strip coil such as a cold rolled steel strip coil, there is a method shown in FIG. In this method, two support members 20 are fixedly installed in parallel on the floor to form a support 20. Then, the major axis of the substantially elliptical cross section of the deformed metal band coil 50 and the vertical line are made substantially coincide with each other, and the axial direction of the metal band coil 50 and the axial direction of the support base 20 are made parallel to each other. Is supported by the two supports 20, and the metal strip coil 50 is crushed in the vertical direction by its own weight to correct the inner shape of the coil to a circular shape.
[0005]
Also, Japanese Patent Application Laid-Open No. 56-23233 discloses an invention (second prior art) of a method for cooling a hot-rolled coil. In the second prior art, a hot-rolled coil is placed on a substantially V-shaped deformation prevention table having a 40-degree to 50-degree inclined plate opposed thereto, and the hot-rolled coil is cooled while being deformed. Using this second conventional technique, it is also possible to correct a metal strip coil such as a cold-rolled steel strip coil whose coil inner shape is deformed.
[0006]
Furthermore, when the metal strip coil is wound in a coil shape under inappropriate tension and deformed, when the transport is started after correcting the deformation of the metal strip coil, the deformation often occurs again. As a third conventional technique for preventing the metal band coil from being deformed again after the correction, as shown in FIG. 9, a support 52 is inserted inside the coil of the metal band coil 50 after the correction, and the metal There is a method of preventing deformation of the inner shape of the band coil 50.
[0007]
[Problems to be solved by the invention]
However, in the first prior art, the deformation is corrected by simply supporting the metal band coil with two rod-shaped members provided on the floor, and the deformation is corrected by inserting the coil into the mandrel of the payout reel. When the metal band coil is moved after the above, the inner diameter of the metal band coil may be deformed again.
[0008]
Further, in the second prior art, the mandrel of the payout reel is deformed while the deformation is corrected by supporting the metal band coil on the deformation prevention table by making the deformation prevention table movable. It can be inserted into the metal strip coil after straightening. However, the height of the center of the metal band coil on the deformation preventing stand varies depending on the outer diameter of the metal band coil. Therefore, in order to insert the mandrel of the payout reel into the metal band coil, the center height of the metal band coil must be raised and lowered to the height of the mandrel of the payout reel. When the outer diameter size of the metal band coil to be handled changes widely, there is a disadvantage that the distance for moving up and down each metal band coil becomes large, and the elevating device becomes large.
[0009]
Further, in the third conventional technique, there is a disadvantage that the inside of the metal strip coil to be re-deformed presses the support with a strong force, and it becomes difficult to remove the support. Also, if the support comes off while inserting the mandrel of the payout reel into the metal band coil, the inner shape of the coil will be deformed and the mandrel will be pinched, and it is necessary to remove the mandrel from being inserted into the metal band coil. There was a disadvantage that it could not be done.
[0010]
The present invention has been made in order to eliminate the above-described problems of the conventional technology, and has an object to correct a deformation of a metal strip coil before inserting a mandrel of a payout reel into the metal strip coil. Another object of the present invention is to provide a metal band coil correction method and a metal band coil correction table in which the difference in the height of the center of each metal band coil after correction is reduced regardless of the difference in the outer diameter of the metal band coil.
[0011]
[Means for Solving the Problems]
The present invention has the following configuration to solve the problem. The invention according to claim 1 is characterized in that a pair of support bases is configured so that the distance between the support bases can be changed, and the metal base coil is supported by the pair of support bases. Is the way.
[0012]
According to the first aspect of the invention, when the metal band coil whose cross-sectional shape is deformed into an elliptical shape is supported by a pair of supports, the metal band coil is deformed by the reaction force received from the support, and the cross-sectional shape is substantially a perfect circle. It becomes. When the distance between the supports is increased, the metal band coil moves downward between the supports, and when the distance between the supports is reduced, the metal band coil moves upward between the supports. Therefore, by changing the interval between the supports, the height of the center of the metal band coil with respect to the support is changed, and the center height of the metal band coil can be adjusted.
[0013]
The invention of claim 2 is the metal band coil straightening method according to claim 1, wherein when the outer diameter of the metal band coil is large, the distance between the supports is increased to increase the height of the center of the metal band coil. The metal band coil correction method is characterized in that when the outer diameter of the metal band coil is small, the distance between the supports is reduced to increase the height of the center of the metal band coil.
[0014]
According to the second aspect of the invention, when the outer diameter of the metal band coil is large, the interval between the supports is increased, and the height of the center of the metal band coil with respect to the support is reduced. When the outer diameter of the metal band coil is small, the interval between the supports is narrowed, and the height of the center of the metal band coil with respect to the support is increased. Therefore, when the outer diameter of the metal band coil is large and small, the difference in the height of the center of each metal band coil with respect to the support stand is small.
[0015]
The invention of claim 3 is the metal band coil straightening method according to claim 1 or 2, wherein the pair of support bases each have a distance between portions that come into contact with the outer peripheral surface of the metal band coil, A metal band coil straightening method, wherein the outer diameter of the metal band coil supported by the support is 0.59 to 0.74 times.
According to the third aspect of the present invention, the distance between the portions where the supports come into contact with the outer peripheral surface of the metal band coil is 0.59 to 0.74 times the outer diameter of the metal band coil supported by the support. Then, the cross-sectional shape of the metal strip coil is corrected to a substantially perfect circle. If this distance is smaller than 0.59 times the outer diameter of the metal band coil supported by the support, the horizontal reaction force received by the metal band coil from the support is small, and the deformed cross-sectional shape of the metal band coil is substantially reduced. It does not return to a perfect circle. When this distance is larger than 0.74 times the outer diameter of the metal band coil supported by the support, the horizontal force exerted on the support by the metal band coil increases rapidly, and the distance between the supports is increased. The force for widening is too large, and it is difficult to maintain the positional relationship between the supports.
[0016]
In addition, when the distance between the portions where the support stand contacts the outer peripheral surface of the metal band coil is 0.59 to 0.74 times the outer diameter of the metal band coil supported by the support stand, The intersection angle between the normals of the respective tangent planes at the portion where the outer peripheral surface of each of the contact surfaces comes into contact with each support base is 72 to 95 degrees.
According to a fourth aspect of the present invention, there is provided a metal band coil correcting table, comprising a pair of supporting tables, wherein the distance between the supporting tables can be changed.
[0017]
According to the fourth aspect of the present invention, the metal strip coil having a deformed cross-sectional shape is supported on a pair of supporting stands, and the cross-sectional shape is corrected to be substantially a perfect circle by using the method according to the first aspect. Also, when the distance between the supports is changed, the height of the center of the metal strip coil with respect to the supports is also changed.
The invention according to claim 5 is the metal band coil straightening table according to claim 4, wherein at least one of the supports comes into contact with the outer peripheral surface of the metal band coil in a downward direction as approaching the other support. It is a metal band coil straightening base characterized by being formed by an inclined surface facing forward.
[0018]
According to the fifth aspect of the present invention, when the inclined surface of the support base is formed as a flat surface, the normal direction is the same over the entire inclined surface, and the position on the outer peripheral surface of the metal strip coil that contacts the inclined surface is Always in the same place. For this reason, the distance between the portions where the support stand contacts the outer peripheral surface of the metal strip coil is determined by the inclination angle of the inclined surface of the support stand and the outer diameter of the metal strip coil. The height of the center of the metal strip coil with respect to the supports is determined by the distance between the supports.
[0019]
Further, when the inclined surface of the support is formed by a curved surface, the normal direction of the curved surface of the support that comes into contact with the outer peripheral surface of the metal strip coil differs depending on the portion of the curved surface. For this reason, the position of the outer peripheral surface of the metal band coil in contact with the support base is not constant, and the interval between the portions where the support base contacts the outer peripheral surface of the metal band coil is not constant either. Therefore, when the distance between the pair of supporting stands is adjusted, the distance between the portions where the supporting stands contact the outer peripheral surface of the metal strip coil is also adjusted. The curved surface is, for example, a side surface of a cylinder.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of the present invention will be described with reference to the drawings.
First, the configuration of the present embodiment will be described with reference to FIG.
As shown in FIG. 1, there is a metal band coil correction table 1 including a base 10, a slide device 30, and a support table 20. The base 10 is installed on a floor surface, and the upper surface 12 of the base 10 has a table shape. On both left and right sides (left and right sides in FIG. 1) of the upper surface 12, slide devices 30 are respectively installed, and further, a support base 20 is installed on each slide device 30. Each support 20 has a columnar shape with a circular cross-section that is continuous in the axial direction, and each support 20 on each slide device 30 is positioned parallel to each other and forms a pair. Further, a rubber material is stuck on the side surface 22 in the circle, so that the outer peripheral surface of the metal band coil 50 supported on the support base 20 is prevented from being damaged.
[0021]
Further, the slide device 30 has a configuration in which the distance between the support tables 20 can be changed and the distance between the support tables 20 can be maintained while maintaining the support tables 20 parallel to each other. Further, the base 10 includes a lifting device (not shown), and has a configuration in which the height from the floor surface to the support base 20 can be adjusted.
This embodiment is configured as described above, and its operation will be described next.
[0022]
First, the axial direction of the metal band coil 50 whose cross section is deformed into an elliptical shape and the axial direction of the support base 20 are set to the same direction, and the short axis of the elliptical cross section of the metal band coil 50 and the vertical line are almost matched, The coil 50 is supported between the two supports 20. The outer peripheral surface of the metal band coil 50 comes into contact with the surface 22 of each support 20, the weight of the metal band coil 50 acts on the surface 22, and a reaction force fr acts from the surface 22 toward the center of the metal band coil 50.
[0023]
As shown in FIG. 2I, the horizontal component frh of the reaction force fr from the surface 22 is large when the metal band coil 50 is mounted on the support base 20. This horizontal component frh acts on the metal band coil 50 as a deformation restoring force, and the cross-sectional shape of the metal band coil 50 changes from elliptical to circular. As shown in FIG. 2 (ii), the horizontal component frh of the reaction force fr from the surface 22 decreases as the cross-sectional shape of the metal band coil 50 is corrected to a circular shape. When the cross-sectional shape of the metal band coil 50 becomes substantially a perfect circle, the reaction force fr from the surface 22 becomes minimum, and the deformation of the cross-sectional shape of the metal band coil 50 stops.
[0024]
Note that the distance L is the distance between the portions where the pair of support bases 20 are in contact with the outer peripheral surface of the metal band coil 50, that is, the surface 22 of each support base 20 is in contact with the outer peripheral surface of the metal band coil 50. It is preferable that the distance L between the parts is 0.59 times to 0.74 times the outer diameter of the metal band coil 50. Here, FIG. 3 shows the relationship between the distance L and the horizontal component reaction force frh that the metal band coil 50 receives from the support 20. On the vertical axis, a value of (reaction force fr received by the metal band coil 50 from the support 20) / (weight of the metal band coil 50 × 0.5) is taken (hereinafter, “(the metal band coil 50 from the support 20 is The value of (reaction force fr) received / (weight of metal strip coil 50 × 0.5) ”is referred to as a reaction force coefficient.), And the relative magnitude of reaction force fr is dimensionlessly expressed. Also, the horizontal axis takes the value of (distance L) / (outer diameter of metal strip coil 50) (hereinafter, “the value of (distance L) / (outer diameter of metal strip coil 50)” is referred to as an interval coefficient. ), The relative magnitude of the distance L with respect to the outer diameter of the metal strip coil 50 is shown in a dimensionless manner.
[0025]
From FIG. 3, it is understood that when the interval coefficient exceeds 0.74, the reaction force coefficient sharply increases. That is, under the condition that the spacing coefficient exceeds 0.74, the slide device 30 receives a force of a magnitude corresponding to the reaction force coefficient from the support base 20, so that the size of the slide device 30 is increased so that the slide device 30 can withstand this force. There must be. Also, the reaction force coefficient decreases as the spacing coefficient decreases. When the interval coefficient is smaller than 0.59, the horizontal component frh of the reaction force fr acting on the metal band coil 50 also becomes small, and the metal band coil 50 is corrected from an elliptical cross-sectional shape to a substantially perfect circular cross-sectional shape. Can not. Therefore, by setting the interval coefficient to be 0.59 times to 0.74 times, the deformation of the metal strip coil 50 can be corrected without increasing the size of the slide device 30.
[0026]
When the metal strip coils 50 having different outer diameters are corrected by the metal strip coil correction table 1, the distance between the supports 20 is changed according to the outer diameter of the metal strip coil 50 to change the distance L. For example, the distance coefficient is selected to be 0.74, and the distance L is increased when correcting the metal strip coil 50 having a large outer diameter, and the distance L is reduced when correcting the metal strip coil 50 having a small outer diameter. It becomes.
[0027]
When the distance L is increased, the lower end of the metal band coil 50 is lowered further below the height of the support base 20, and when the distance L is reduced, the lower end of the metal band coil 50 is lowered relative to the height of the support base 20. Rises further upward (see FIGS. 4 (i) and (ii)). Therefore, the height position of the center of the metal band coil 50 having a large outer diameter is lowered downward with respect to the height position of the support base 20, and the height position of the center of the metal band coil 50 having a small outer diameter is raised upward. .
[0028]
Further, in adjusting the distance L, the spacing coefficient is not fixed, and in the case of the metal band coil 50 having a large outer diameter, the spacing coefficient is increased to approach 0.74, and in the case of the metal band coil 50 having a small outer diameter. , The interval coefficient can be reduced to approach 0.59. When the spacing coefficient is changed, the height position of the center of the large outer diameter metal strip coil 50 is further lowered, and the height position of the center of the small outer diameter metal strip coil 50 is further raised upward.
[0029]
On the other hand, when supporting the metal band coils 50 having different outer diameters without changing the distance L, the height position of the lower end of the metal band coil 50 having the larger outer diameter is set to the height of the lower end of the metal band coil 50 having the smaller outer diameter. It is higher than the position. For this reason, the height position of the center of the metal band coil 50 having a large outer diameter rises upward with respect to the height position of the support base 20, and the height position of the center of the metal band coil 50 having a small outer diameter moves downward. Go down.
[0030]
Therefore, when the distance L is changed in accordance with the outer diameter of the metal band coil 50, the difference between the height positions of the centers of the metal band coils 50 is smaller than when the distance L is fixed. Become. Further, if the interval coefficient is changed together with the distance L, the difference becomes smaller. That is, the mandrel of the payout reel is inserted into the center of the metal band coil 50 after the deformation is corrected by changing the space between the support bases 20 and also changing the space coefficient as necessary. The amount of height position that must be adjusted by lifting and lowering is smaller. Therefore, it is not necessary to increase the size of the lifting device.
[0031]
Therefore, with the metal band coil correction table 1 according to the present embodiment, the force applied to the slide device 30 can be reduced, and the slide device 30 can be prevented from being damaged by a large force, and the elevating device can be increased in size. Therefore, it is not necessary to adjust the height position of the center of the metal band coil, and the cost of the metal band coil correction table can be reduced.
Next, a second embodiment of the present invention will be described with reference to the drawings. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.
[0032]
First, the configuration of the present embodiment will be described with reference to FIG. The metal band coil correction table 1 of the present embodiment has the same configuration as the metal band coil correction table 1 of the first embodiment except that the shape of the support 20 is different. The support base 20 has the shape of a triangular prism in which the cross section of a right-angled isosceles triangle is continuous in the axial direction. A surface 22 formed by continuous oblique sides of a right-angled isosceles triangle that forms a cross section of each support base 20 faces obliquely upward inside the base upper surface 12. Then, a rubber material is stuck on the surface 22.
[0033]
This embodiment is configured as described above, and its operation will be described next. The description of the same operation by the same configuration as the first embodiment will be omitted.
The normal direction of the surface 22 of the support 20 is the same over the entire surface 22, and the position of the outer peripheral surface of the metal band coil 50 that contacts the surface 22 is always the same regardless of the interval between the supports 20. , The interval coefficient also takes a constant value. Therefore, when the inclination angle of the surface 22 is changed and the normal direction of the surface 22 is changed, the position of the outer peripheral surface of the metal band coil 50 that is in contact with the surface 22 also changes, the spacing coefficient changes, and the spacing coefficient increases by 0.59 times. 0.70.74 times.
[0034]
As shown in FIGS. 6 (i) and 6 (ii), when the distance between the supports 20 is increased, the position on the surface 22 which is in contact with the outer peripheral surface of the metal band coil 50 is lowered, and the metal band coil The height position at the center of 50 also goes down. When the interval between the supports 20 is reduced, the position on the surface 22 that comes into contact with the outer peripheral surface of the metal band coil 50 is raised, and the height position of the center of the metal band coil 50 is also raised.
[0035]
Therefore, when supporting the metal band coil 50 having a large outer diameter, the interval between the supports 20 is widened, the height of the center of the metal band coil 50 is lowered, and the metal band coil 50 having a small outer diameter is supported. In this case, the distance between the supports 20 is reduced, and the height of the center of the metal strip coil 50 is increased. Thereby, the difference between the height positions of the centers of the metal strip coils 50 having different outer diameters becomes smaller, and it is not necessary to make the elevating device of the base 10 large.
[0036]
Therefore, the metal band coil correction table 1 according to the present embodiment has the same effect as that of the first embodiment.
Next, as shown in FIG. 7, in the metal band coil correction table 1 described in the second embodiment, when the distance between the support tables 20 is fixed and not moved (Comparative Example), In the metal band coil correction table 1 according to the embodiment, the height from the lower part of the support table 20 to the center of the metal band coil 50 differs depending on the case where the distance between the support tables 20 is adjusted and moved (example of the present invention). Compared. The horizontal axis of FIG. 7 indicates the outer diameter of the metal band coil 50, and the vertical axis indicates the height from the lower part of the support 20 to the center of the metal band coil 50. In both cases, the spacing coefficient was set to 0.74, and the surface 22 of the support 20 of the metal band coil correction table 1 according to the second embodiment was inclined at 45 degrees. For comparison, in both cases, when the outer diameter of the metal band coil 50 was 800 mm, the height to the center of the metal band coil 50 was the same.
[0037]
FIG. 7 shows that the difference in center height between the metal band coil having an outer diameter of 800 mm and the metal band coil having an outer diameter of 3000 mm is compared in each case. It can be seen that the difference between the heights of the centers is larger by about 750 mm. That is, it can be seen that when the support 20 is adjusted and moved, the difference between the heights of the centers of the metal strip coils 50 is small.
[0038]
In addition, in each of the above embodiments, each support base 20 has a cylindrical shape or a triangular prism shape, but it is a matter of course that other shapes can be adopted. For example, it is also possible to form each support base by arranging spheres.
In each of the above embodiments, the slide device 30 is provided on both the left and right sides of the upper surface 12 of the base 10. However, the slide device is provided on only one side, and one support base is fixed to the upper surface of the base. It is also possible.
Further, in each of the above embodiments, the rubber material is stuck to the surface 22 of the support base 20, but it is a matter of course that the present invention is not limited to the rubber material.
[0039]
【The invention's effect】
The present invention is a metal band coil correcting method and a metal band coil correcting table as described above, and thus has the following effects. That is, a metal band coil straightening method and a metal band coil straightening table that can correct the deformation of the metal band coil and reduce the difference in the height of the center of the metal band coil after correction regardless of the difference in the outer diameter of the metal band coil. There is an effect that it can be provided.
[Brief description of the drawings]
FIG. 1 is a front view showing a metal band coil correction table according to a first embodiment.
FIG. 2 is an explanatory diagram showing a force acting on a deformed metal strip coil.
FIG. 3 is a diagram illustrating a relationship between an interval coefficient and a reaction force coefficient.
FIG. 4 is an explanatory diagram showing a relationship between a distance L and a position of a metal strip coil in the first embodiment.
FIG. 5 is a front view showing a metal band coil correction table according to a second embodiment.
FIG. 6 is an explanatory diagram showing a relationship between a distance L and a position of a metal strip coil according to the second embodiment.
FIG. 7 is an explanatory diagram showing the relationship between the outer diameter of the metal band coil and the height position of the center of the metal band coil.
FIG. 8 is an explanatory diagram of a method of correcting a metal strip coil according to the first related art.
FIG. 9 is an explanatory view of a method for preventing deformation of a metal strip coil according to a third conventional technique.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 metal band coil correction table 10 base 12 base top surface 20 support table 22 support table side surface 30 slide device 50 metal band coil 52 support fr reaction force frh horizontal component of reaction force

Claims (5)

対をなす支持台を、当該支持台同士の間隔を変更可能に構成し、この対をなす支持台にて金属帯コイルを支承することを特徴とする金属帯コイル矯正方法。A metal band coil straightening method, comprising: forming a pair of support bases such that the distance between the support bases can be changed; and supporting the metal band coils by the pair of support bases. 請求項1に記載の金属帯コイル矯正方法であって、金属帯コイルの外径が大きな場合には前記支持台同士の間隔を広げて当該金属帯コイルの中心の高さを下げ、金属帯コイルの外径が小さな場合には前記支持台同士の間隔を狭めて当該金属帯コイルの中心の高さを上げることを特徴とする金属帯コイル矯正方法。2. The metal band coil straightening method according to claim 1, wherein when the outer diameter of the metal band coil is large, the distance between the supports is increased to reduce the height of the center of the metal band coil, thereby reducing the metal band coil. Wherein the height of the center of the metal strip coil is increased by narrowing the interval between the supports when the outer diameter of the metal strip coil is small. 請求項1または請求項2に記載の金属帯コイル矯正方法であって、前記対をなす支持台がそれぞれ金属帯コイルの外周面と接触する部位の間の距離を、前記支持台が支承する金属帯コイルの外径の0.59倍〜0.74倍とすることを特徴とする金属帯コイル矯正方法。3. The metal strip coil straightening method according to claim 1, wherein the pair of support bases respectively support a distance between portions where the pair of support bases come into contact with an outer peripheral surface of the metal strip coil. A metal band coil straightening method, wherein the outer diameter of the band coil is 0.59 to 0.74 times. 対をなす支持台を備え、当該支持台同士の間隔を変更可能に構成したことを特徴とする金属帯コイル矯正台。A metal band coil correction table, comprising a pair of support tables, wherein a distance between the support tables can be changed. 請求項4に記載の金属帯コイル矯正台であって、少なくとも一方の前記支持台が金属帯コイルの外周面と接触する部位を、他方の支持台に近づくにつれて下方へ向かう傾斜面により形成したことを特徴とする金属帯コイル矯正台。The metal strip coil correction table according to claim 4, wherein a portion of at least one of the support blocks that contacts the outer peripheral surface of the metal band coil is formed by an inclined surface that faces downward as approaching the other support table. Metal band coil straightening table characterized by the following.
JP2002175652A 2002-06-17 2002-06-17 Method and table for correcting coil of metallic band Pending JP2004017094A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102917813A (en) * 2010-03-12 2013-02-06 Sms西马格股份公司 Method and device for depositing a metal coil
WO2020121042A1 (en) * 2018-12-13 2020-06-18 Arcelormittal Method for preventing coil collapse on hot strip mill coils

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102917813A (en) * 2010-03-12 2013-02-06 Sms西马格股份公司 Method and device for depositing a metal coil
JP2013522042A (en) * 2010-03-12 2013-06-13 エス・エム・エス・ジーマーク・アクチエンゲゼルシャフト Method and apparatus for mounting a coil
WO2020121042A1 (en) * 2018-12-13 2020-06-18 Arcelormittal Method for preventing coil collapse on hot strip mill coils

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