JP4209067B2 - Sleeve guide for steel guide - Google Patents

Sleeve guide for steel guide Download PDF

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Publication number
JP4209067B2
JP4209067B2 JP2000094195A JP2000094195A JP4209067B2 JP 4209067 B2 JP4209067 B2 JP 4209067B2 JP 2000094195 A JP2000094195 A JP 2000094195A JP 2000094195 A JP2000094195 A JP 2000094195A JP 4209067 B2 JP4209067 B2 JP 4209067B2
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guide
steel
cylindrical body
outer peripheral
sleeve guide
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JP2001276921A (en
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伸二 本村
信己 西村
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Sanyo Special Steel Co Ltd
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Sanyo Special Steel Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、鋼材等の圧延ラインに使用される、耐割損性を向上させた鋼材ガイド用スリーブガイドに関する。
【0002】
【従来の技術】
線材、棒鋼圧延工場等で、冷却、成形するための工程において高温・重量材料等の導入に用いられるスリーブガイドは、導入される鋼材等が進入する際に、衝撃を持って接触するため、耐割損性が高いことが求められる。
【0003】
図5は、線材圧延工場での処理フローを示すものである。線材51は圧延機52、水冷帯53を経て、レイングヘッド54でコイル材55に加工され、ステルモアコンベア56にて搬送され、出荷される。水冷帯53、レイングヘッド54等で鋼材ガイド用として使用されるのが、図6(a)(b)に示す鋼材ガイド用スリーブガイド57である。
従来、耐熱鋼、鉄系合金等からなる金属製スリーブガイドが用いられてきたが、金属製スリーブガイドは対割損性は高いが、耐摩耗性が低いことに加え、スリーブガイドの局部摩耗によりスリーブガイド自体にエッジが形成され、そのエッジにより、導入する鋼材等に傷が発生するため、スリーブガイドの交換等のメンテナンスを頻繁に行わなければならないという問題があった。
【0004】
金属以外の材質としては、カーボン製のスリーブガイドが用いられている。カーボン製のスリーブガイドは、金属製に比較して、対割損性、及び耐摩耗性は劣るが、固体潤滑性に優れるため、導入する鋼材等へ傷を付けにくい。しかしながら、割損、摩耗によるメンテナンス頻度は、金属製スリーブガイドよりも更に多くなるという問題があった。
【0005】
近年においては、導入する鋼材等と接触する部分を、窒化珪素等のセラミックで形成したセラミック製スリーブガイドが提案されるようになっている。窒化珪素等のセラミック製スリーブガイドの耐摩耗性は、金属製やカーボン製スリーブガイドに比べて優れているが、対割損性については、カーボン製スリーブガイドと同等で金属製よりも劣り、鋼材等の進入時の衝撃によっては、割損により小片に分断され飛散し、鋼材の圧延ラインの工程停止を招くという問題があった。
【0006】
又、実開平5−18710号公報によれば、鋳鉄製の保護材とセラミックス製ガイドとの構造から成る金属材料移送用ガイドが提案されている。ガイドの摩耗頻度の低減や、鋼材等の製品の傷発生防止が図られているが、セラミックス製のガイドと鋳鉄製の保護材が入口の口金と出口の止金で固定されているだけであり、セラミックス製のガイドは鋳鉄製の保護材に密着状態で保護されておらず、鋼材等の導入時の衝撃、及び振動で破損しやすく、長期安定して使用できず、又、一度破損してしまうと保護材がガイド本体を支えきれず飛散してしまうという問題があった。
【0007】
特許第2527765号公報では、線材レイング装置の改善が提案されており、この中で金属の長尺状外パイプと複数個のカーボン単体潤滑パイプとの構造からなる線材ガイドが示されている。しかしながら、複数個のカーボン単体潤滑パイプと長尺状外パイプの固定は出口側の止金によるもので、鋼材等の導入時の衝撃、及び振動、又は、このときのカーボン単体潤滑パイプ同士の衝突により破損し飛散してしまうという問題があった。
【0008】
【発明が解決しようとする課題】
本発明は、このような従来技術の有する問題点に鑑みてなされたものであり、その目的とするところは、導入される鋼材等が進入する際の衝撃による割損、及び割損による飛散が生ずることを防止した充分な耐割損性を有し、若しくは割損した場合でも飛散しないため、鋼材の圧延ラインへの被害を抑え得る、又、構造が安定していて導入される鋼材等が進入する際の衝撃、及び振動による破損や構成部品の外れ等のない、長期間、安定して、鋼材等を案内し得るスリーブガイドを提供することにある。
【0009】
【課題を解決するための手段】
即ち、本発明によれば、鋼材の圧延ラインに使用される、内筒部円筒体と内筒部円筒体の外周部に金属材料から成る外周部円筒体を嵌合した二重構造のスリーブガイドであって、内筒部円筒体の外径より小さな内径を有する外周部円筒体を用いて、外周部円筒体の軸線方向の胴体部分を一部切り欠き、内筒部円筒体を外周部円筒体に圧入し固定することを特徴とする鋼材ガイド用スリーブガイドが提供される。
【0010】
又、本発明によれば、鋼材の圧延ラインに使用される、内筒部円筒体と内筒部円筒体の外周部に金属材料から成る外周部円筒体を嵌合した二重構造のスリーブガイドであって、外周部円筒体を、加熱して熱膨張により寸法が拡大した状態で内筒部円筒体へ嵌め合わせて、冷却することにより固定することを特徴とする鋼材ガイド用スリーブガイドが提供される。
【0011】
更に、本発明によれば、鋼材の圧延ラインに使用される、内筒部円筒体と内筒部円筒体の外周部に金属材料から成る外周部円筒体を嵌合した二重構造のスリーブガイドであって、外周部円筒体の一端部と、内筒部円筒体の一端部を、各々の直胴部分断面より小さな径であるテーパー部として、外周部円筒体を内筒部円筒体に固定することを特徴とする鋼材ガイド用スリーブガイドが提供される。
【0012】
本発明においては、内筒部円筒体の材料は、セラミック材料、カーボン材料、カーボン複合材料、及びセラミック複合材料のいずれかの材料から成ることが好ましい。
セラミック材料としては、窒化珪素、サイアロン、ジルコニア、炭化珪素、及びアルミナのうち、いずれか一種を主相とすることが好ましく、カーボン材料としては、グラファイト、又はマトリックス化した炭素繊維と炭素粉末から成るC/Cコンポジットからなることが好ましい。又、カーボン複合材料としては、SiC系複合材料、又はSi−SiC系複合材料から成ることが好ましい。更には、セラミック複合材料としては、窒化珪素、サイアロン、ジルコニア、炭化珪素、アルミナ、SiC系複合材料、及びSi−SiC系複合材料のうち、2種以上を混合して焼結させた材料から成ることが好ましい。
【0013】
本発明においては、外周部円筒体の材料は、ステンレス鋼等の耐熱鋼から成ることが好ましい。
【0014】
【発明の実施の形態】
本発明においては、鋼材ガイド用スリーブガイドを、セラミック材料、カーボン材料、カーボン複合材料、又はセラミック複合材料から成る内筒部円筒体と、その円筒体の外周部に、ステンレス鋼等の金属材料から成る外周部円筒体を嵌合した二重構造とした。そして、内筒部円筒体と外周部円筒体を固定する手段、即ち二重構造にする方法として、外周部材質の持つ弾力性によるバネ力を利用すること、又、外周部材質の持つ温度による膨張収縮現象を利用すること、更には鋼材等が浸入する方向とは反対側の円形の端面を絞り込むことを採用した。これらにより、鋼材ガイド用スリーブガイドに充分な耐割損性が付与され、短時間の使用期間内に、導入される鋼材等が進入する際の衝撃による割損、及び割損による飛散が生じることを防止し、若しくは割損した場合でも飛散しないため鋼材の圧延ラインへの被害を抑えることができ、又、構造が安定していて導入される鋼材等が進入する際の衝撃、及び振動による破損や構成部品の外れ等がなく、長期間、安定して、鋼材等を案内できる。
【0015】
即ち、二重構造の外側には、衝撃に強く優れた対割損性を持つ金属材料を使用し、金属材料の低い耐摩耗性や鋼材等に傷を付けやすい性質を補うために、二重構造の内側である鋼材等と接触する部分には、対割損性は劣るが耐摩耗性、固体潤滑性に優れるセラミック材料、カーボン材料、カーボン複合材料、又はセラミック複合材料を使用し、外周部材質の持つ弾力性によるバネ力の利用や外周部材質の持つ温度による膨張収縮現象の利用や鋼材等が浸入する方向とは反対側の円形の端面の絞り込みで二重構造を固定することで、鋼材ガイド用スリーブガイドに上記の特性を付与できるのである。
【0016】
本発明において、スリーブガイドの用途、種類に特に制限はなく、鋼材等の導入に使用されるものであればよい。
【0017】
上記の鋼材ガイド用スリーブガイドが使用される線材圧延工場の処理フローは、図5に示すようなものである。レイングヘッド54の導入に使用されるスリーブガイドの他、水冷帯53への導入にもスリーブガイドは用いられる。これらスリーブガイドが、セラミック材料、カーボン材料、カーボン複合材料、又はセラミック複合材料から成る内筒部円筒体と、その円筒体の外周部に、金属材料から成る外周部円筒体を嵌合した、二重構造から構成されることになる。
【0018】
図1は、本発明に係わる鋼材ガイド用スリーブガイドのうち外周部円筒体の軸線方向の胴体部分を一部切り欠いた構造を有する鋼材ガイド用スリーブガイドの一実施形態を示す説明図で、(a)が内筒部円筒体単体の断面図、(b)が外周部円筒体単体の断面図、(c)が(b)のA−A断面図、(d)が内筒部と外周部を嵌合した状態での軸線方向の断面図、(e)が(d)のB−B断面図である。この鋼材ガイド用スリーブガイド16は、内筒部円筒体12の外側に、外周部円筒体11を嵌合させた構造となっている。
【0019】
この鋼材ガイド用スリーブガイド16では、対割損性に優れる材質を使用した外周部円筒体11と、固体潤滑性、及び摩耗性に優れる材質を使用した内筒部円筒体12から成っているが、内筒部に外周部を嵌合させる手段として、外周部材質の持つ弾力性によるバネ力を利用している。即ち、内筒部円筒体12の外径よりも外周部円筒体11の内径は小さいものとし、外周部円筒体11の軸線方向の胴体部分を切り欠き、この切り欠き部分13を押し広げると、内筒部円筒体12の外径よりも外周部円筒体11の内径が拡がり、この機に内筒部を外周部へ挿入させる。切り欠き部分13を押し広げることを止めれば、外周部材質の持つ弾力性によるバネ力で、外周部円筒体11は、内筒部円筒体12に密着する。外周部円筒体11の内径寸法は、外周部円筒体11の材質や厚さ等の条件により、その都度設定される。
【0020】
図2は、本発明に係わる鋼材ガイド用スリーブガイドのうち外周部円筒体を内筒部円筒体へ焼きばめして固定される鋼材ガイド用スリーブガイドの一実施形態を示す説明図で、(a)が内筒部円筒体単体の断面図、(b)が外周部円筒体単体の断面図、(c)が(b)のA−A断面図、(d)が内筒部と外周部を嵌合した状態での軸線方向の断面図、(e)が(d)のB−B断面図である。この鋼材ガイド用スリーブガイド26は、内筒部円筒体22の外側に、外周部円筒体21を嵌合させた構造となっている。
【0021】
この鋼材ガイド用スリーブガイド26では、対割損性に優れる材質を使用した外周部円筒体21と、固体潤滑性、及び摩耗性に優れる材質を使用した内筒部円筒体22から成っているが、内筒部に外周部を嵌合させる手段として、外周部材質の持つ温度による膨張収縮現象を利用している。即ち、内筒部円筒体22の外径よりも外周部円筒体21の内径は僅かに小さいものとし、外周部円筒体21を加熱して熱膨張により寸法が拡大した状態で、内筒部円筒体22へ嵌め合わせて冷却することにより収縮締結し、外周部円筒体21は、内筒部円筒体22に密着する。外周部円筒体21の内径寸法は、外周部円筒体21の材質や厚さ、及び内筒部円筒体22の材質等の条件により、その都度設定される。
【0022】
図3は、本発明に係わる鋼材ガイド用スリーブガイドのうち外周部円筒体及び内筒部円筒体が、鋼材等が浸入する方向とは反対側の円形の端面で絞り込まれた構造を有する鋼材ガイド用スリーブガイドの一実施形態を示す説明図で、(a)が内筒部円筒体単体の断面図、(b)が外周部円筒体単体の断面図、(c)が(b)のA−A断面図、(d)が内筒部と外周部を嵌合した状態での軸線方向の断面図、(e)が(d)のB−B断面図である。この鋼材ガイド用スリーブガイド36は、内筒部円筒体32の外側に、外周部円筒体31を嵌合させた構造となっている。
【0023】
この鋼材ガイド用スリーブガイド36では、対割損性に優れる材質を使用した外周部円筒体31と、固体潤滑性、及び摩耗性に優れる材質を使用した内筒部円筒体32から成っているが、内筒部に外周部を嵌合させる手段として、内筒部円筒体32及び外周部円筒体31ともに、鋼材等が浸入する方向とは反対側の円形の端面を絞り込むことを行っている。内筒部円筒体32の外径よりも外周部円筒体31の内径は、直径で0〜0.05mm程度に大きいものとし、内筒部円筒体32を外周部円筒体31へ差し込むが、鋼材等が浸入する方向とは反対側の円形の端面を直胴部分断面より小さな径とする、即ち径方向から見た断面において端面に向かって直径が一定の割合で連続的に小さくなるテーパー部分を有することで絞り込むことにより外周部円筒体31は、内筒部円筒体32に密着する。
【0024】
図4は、図1〜3で示した、本発明に係わる内筒部円筒体に外周部円筒体を嵌合させる手段として挙げた3つの手段、即ち、外周部材質の持つ弾力性によるバネ力を利用する手段、外周部材質の持つ温度による膨張収縮現象を利用する手段、鋼材等が浸入する方向とは反対側の円形の端面を絞り込む手段、を全て採用した鋼材ガイド用スリーブガイド46の実施形態を示す説明図で、(a)が内筒部円筒体単体の断面図、(b)が外周部円筒体単体の断面図、(c)が(b)のA−A断面図、(d)が内筒部と外周部を嵌合した状態での軸線方向の断面図、(e)が(d)のB−B断面図である。この鋼材ガイド用スリーブガイド46は、内筒部円筒体42の外側に、外周部円筒体41を嵌合させた構造となっている。
この他、本発明において内筒部円筒体に外周部円筒体を嵌合させる手段は、3つの手段の内、いずれか2つの手段を組み合わせて採用することもできる。
【0025】
図1〜4の鋼材ガイド用スリーブガイド16、26、36、46において、鋼材導入部14、24、34、44より鋼材製品が入ってくるが、この時鋼材は内筒部円筒体12、22、32、42の内側に接触する。従って、内筒部円筒体の材質は、耐摩耗性が高く製品に傷を付けにくい固体潤滑性を有する必要があり、セラミック材料、カーボン材料、カーボン複合材料、セラミック複合材料等が選定される。
【0026】
図1〜4の鋼材ガイド用スリーブガイド16、26、36、46において、鋼材導入部14、24、34、44より鋼材製品が入って来たときに、スリーブガイドは振動し、圧延ライン機器本体と完全に固定されたものではないため小さな衝突が繰り返される。従って、外周部円筒体11、21、31、41の材質は、高い耐衝撃性を有する必要があり、金属材料等が選定される。
【0027】
本発明において、内筒部円筒体に使用されるセラミック材料としては、窒化珪素、サイアロン、ジルコニア、炭化珪素、及びアルミナのうち、いずれか一種を主相とする材料であることが好ましい。
【0028】
本発明において、内筒部円筒体に使用されるカーボン材料としては、グラファイト、又はマトリックス化した炭素繊維と炭素粉末から成るC/Cコンポジット材料であることが好ましい。
【0029】
本発明において、内筒部円筒体に使用されるSiC系複合材料としては、炭化珪素と炭素繊維と炭素繊維以外の炭素成分とから構成され、骨格部と骨格部の周囲に形成されたマトリックスとからなる構造を有するSiC−C/Cコンポジット複合材料であることが好ましい。
【0030】
本発明において、内筒部円筒体に使用されるSi−SiC系複合材料としては、C/Cコンポジットから成る基本骨格をSi−SiC系材料からなるマトリックスが取り巻いた構成を有する材料であることが好ましい。
【0031】
本発明において、内筒部円筒体に使用されるセラミック複合材料としては、窒化珪素、サイアロン、ジルコニア、炭化珪素、アルミナ、SiC系複合材料、及びSi−SiC系複合材料のうち、いずれか2種以上を混合して焼結させた材料であることが好ましい。
【0032】
【実施例】
以下、本発明を実施例を用いてさらに詳しく説明するが、本発明はこれらの実施例に限られるものではない。
【0033】
(実施例1)
二重構造鋼材ガイド用スリーブガイドを構成する内筒部円筒体の部材として、窒化珪素を使用した。又、外周部円筒体の部材としてステンレス鋼を使用した。図5に示す線材圧延工場において、これらの材料から加工したステンレス鋼管の内側に、窒化珪素管を嵌合して構成された、外径43mm、内径25mm、長さ43mmの鋼材ガイド用スリーブガイド一式(15個)を用いて、レイングヘッド54入口側に装着した。装着方法は、図7(a)及び(b)に示すように金属パイプに鋼材ガイド用スリーブガイド15個を直列挿入して、金属パイプ両端に止め金を溶接し固定した。線材51を鋼材ガイド用スリーブガイドを介してレイングヘッド54へ導入し、線材51の延べ通過重量と、スリーブガイドの割損状況を観察した。同じ観察を、同条件で製作した5式のスリーブガイドで、5回行った。その結果を表1に示す。
【0034】
窒化珪素の円筒体は次のように製造した。窒化珪素原料に、所定量のバインダーを添加し、混合、乾燥造粒し、得られた造粒原料をゴム型より構成される成形型に充填し、静水圧プレス機により成形し、外径50mm、内径30mm、長さ55mmの成形体を作製した。次いで、この成形体をNC旋盤で所定形状に加工し、大気中400℃で仮焼してバインダーを除去した後、常圧下の窒素雰囲気1700℃で1時間焼成して焼結体を得た。次には、得られた焼結体をメタルボンドダイヤモンド砥石を用いて、外径39mm、内径25mm、長さ43mmに加工し、鋼材が進入する方向とは反対側の外径エッジ部分を軸線方向に3mm、15°テーパ加工し仕上げることにより、窒化珪素の内筒部円筒体を製造した。
一方、ステンレス鋼の円筒体は、ステンレス鋼管(外径42mm、内径38mm、長さ43mm)を片側の内径側が軸線方向に3mm、15°テーパとなるように絞り込み、更に、軸線方向に幅2mmの切欠加工を行うことにより、製作した。
【0035】
(実施例2)
二重構造鋼材ガイド用スリーブガイドを構成する内筒部円筒体の部材として、C/Cコンポジットに珪素、炭化珪素を含浸させ焼成したSi−SiC系複合材料を使用した。内筒部円筒体の部材以外は実施例1と同様の鋼材ガイド用スリーブガイドを作製し、実施例1と同様の条件下でスリーブガイドの割損状況を観察した。その結果を表1に示す。
【0036】
(比較例1)
二重構造ではない鋼材ガイド用スリーブガイドの部材として、窒化珪素を使用し、外径43mm、内径25mm、長さ43mmの鋼材ガイド用スリーブガイドを作製し、実施例1と同様の条件下でスリーブガイドの割損状況を観察した。その結果を表1に示す。
【0037】
(比較例2)
二重構造ではない鋼材ガイド用スリーブガイドの部材として、C/Cコンポジットに珪素、炭化珪素を含浸させ焼成したSi−SiC系複合材料を用いて、外径43mm、内径25mm、長さ43mmの鋼材ガイド用スリーブガイドを作製し、実施例1と同様の条件下でスリーブガイドの割損状況を観察した。その結果を表1に示す。
【0038】
(考察)
窒化珪素を用いた、二重構造ではない、比較例1の鋼材ガイド用スリーブガイドを使用した場合は、スリーブガイドは直ぐに割損、飛散し、ライン停止に至った。この時の延べ線材通過重量は2000〜3000kgであった。
又、Si−SiC系複合材料を用いた、二重構造ではない、比較例2の鋼材ガイド用スリーブガイドを使用した場合でも、スリーブガイドは早めに割損、飛散し、ライン停止に至った。この時の延べ線材通過重量は3000〜4000kgであった。
一方、外周部にステンレス鋼の管を配した二重構造鋼材ガイド用スリーブガイドを使用した場合は、内筒部円筒体の部材として、窒化珪素を使用した実施例1において、スリーブガイドの割損は起きず、クラックの発生等も見られなかった。この時の延べ線材通過重量は80000kgであった。又、内筒部円筒体の部材としてSi−SiC系複合材料を使用した実施例2では、延べ線材通過重量が50000kgにおいて、スリーブガイドの割損が確認されたが、飛散しておらず、ライン停止には至らなかった。
【0039】
【表1】

Figure 0004209067
【0040】
【発明の効果】
以上説明したように、本発明によれば、対割損性に優れ、鋼材等の導入口として長時間使用しても割れることがなく、又、構造が安定していて導入される鋼材等が進入する際の衝撃、及び振動による破損や構成部品の外れ等もなく、鋼材ガイド用スリーブガイドの寿命を長くすることができ、即ち線材、棒鋼の圧延ラインのメンテナンス頻度を少なくできるため、鋼材等の製品の製造コストを低減することができる。又、鋼材ガイド用スリーブガイドの内筒部円筒体が、仮に割損した場合でも、外周部円筒体により飛散を防止できるため、鋼材の圧延ラインへの被害を抑えることができ、鋼材等の製品の製造コスト低減に貢献できる。
【図面の簡単な説明】
【図1】 本発明の鋼材ガイド用スリーブガイドの一実施形態を示す説明図で、(a)が内筒部円筒体単体の断面図、(b)が外周部円筒体単体の断面図、(c)が(b)のA−A断面図、(d)が内筒部と外周部を嵌合した状態での断面図、(e)が(d)のB−B断面図である。
【図2】 本発明の鋼材ガイド用スリーブガイドの他の実施形態を示す説明図で、(a)が内筒部円筒体単体の断面図、(b)が外周部円筒体単体の断面図、(c)が(b)のA−A断面図、(d)が内筒部と外周部を嵌合した状態での断面図、(e)が(d)のB−B断面図である。
【図3】 本発明の鋼材ガイド用スリーブガイドの他の実施形態を示す説明図で、(a)が内筒部円筒体単体の断面図、(b)が外周部円筒体単体の断面図、(c)が(b)のA−A断面図、(d)が内筒部と外周部を嵌合した状態での断面図、(e)が(d)のB−B断面図である。
【図4】 本発明の鋼材ガイド用スリーブガイドの更に別の実施形態を示す説明図で、(a)が内筒部円筒体単体の断面図、(b)が外周部円筒体単体の断面図、(c)が(b)のA−A断面図、(d)が内筒部と外周部を嵌合した状態での断面図、(e)が(d)のB−B断面図である。
【図5】 鋼材ガイド用スリーブガイドが使用される一般的な線材圧延工場のフロー例である。
【図6】 (a)は鋼材ガイド用スリーブガイドの正面図である。(b)は鋼材ガイド用スリーブガイドの側面図である。
【図7】 レイングヘッドに適用した鋼材ガイド用スリーブガイドの一実施形態を示す説明図で、(a)は全体側面図である。(b)は(a)のC−C区間の部分拡大断面図である。
【符号の説明】
11…外周部円筒体、12…内筒部円筒体、13…切り欠き、14…鋼材導入部、16…鋼材ガイド用スリーブガイド、21…外周部円筒体、22…内筒部円筒体、24…鋼材導入部、26…鋼材ガイド用スリーブガイド、31…外周部円筒体、32…内筒部円筒体、34…鋼材導入部、35…テーパー部、36…鋼材ガイド用スリーブガイド、41…外周部円筒体、42…内筒部円筒体、43…切り欠き、44…鋼材導入部、45…テーパー部、46…鋼材ガイド用スリーブガイド、51…線材、52…圧延機、53…水冷帯、54…レイングヘッド、55…コイル材、56…ステルモアコンベア、57…鋼材ガイド用スリーブガイド、58…鋼材ガイド用スリーブガイド(レイングヘッドへの適用形)。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sleeve guide for a steel material guide that is used in a rolling line for steel materials and the like and has improved breakage resistance.
[0002]
[Prior art]
Sleeve guides used for the introduction of high temperature / heavy materials in the process of cooling and forming in wire rod and bar rolling mills, etc., come in contact with impact when the steel material to be introduced enters. High breakage is required.
[0003]
FIG. 5 shows a processing flow in the wire rolling mill. The wire 51 passes through a rolling mill 52 and a water cooling zone 53, is processed into a coil material 55 by a laying head 54, is conveyed by a stealmore conveyor 56, and is shipped. A steel material guide sleeve guide 57 shown in FIGS. 6A and 6B is used for the steel material guide in the water cooling zone 53, the laying head 54, and the like.
Conventionally, metal sleeve guides made of heat-resistant steel, iron-based alloys, etc. have been used, but metal sleeve guides have high fracture resistance, but in addition to low wear resistance, local wear of the sleeve guides An edge is formed in the sleeve guide itself, and the edge causes damage to the steel material to be introduced. Therefore, there is a problem that maintenance such as replacement of the sleeve guide must be frequently performed.
[0004]
A carbon sleeve guide is used as a material other than metal. The sleeve guide made of carbon is inferior in breakage resistance and wear resistance as compared with that made of metal, but is excellent in solid lubricity, so that it hardly damages the steel material to be introduced. However, there is a problem that the maintenance frequency due to breakage and wear is further increased than that of the metal sleeve guide.
[0005]
In recent years, a ceramic sleeve guide has been proposed in which a portion in contact with a steel material to be introduced is formed of a ceramic such as silicon nitride. The wear resistance of ceramic sleeve guides such as silicon nitride is superior to that of metal or carbon sleeve guides, but the fracture resistance is equivalent to that of carbon sleeve guides and is inferior to that of metal. Depending on the impact at the time of entry, etc., there was a problem that the material was divided into small pieces due to breakage and scattered, resulting in stop of the rolling process of the steel material.
[0006]
Japanese Utility Model Laid-Open No. 5-18710 proposes a metal material transfer guide having a structure of a cast iron protective material and a ceramic guide. Although the guide wear frequency is reduced and the occurrence of scratches on products such as steel is prevented, the ceramic guide and the cast iron protective material are only fixed by the inlet base and outlet stopper. The ceramic guide is not protected in close contact with the protective material made of cast iron, is easily damaged by the shock and vibration when introducing steel, etc., and cannot be used stably for a long time. As a result, there was a problem that the protective material could not support the guide body and scattered.
[0007]
Japanese Patent No. 2527765 proposes an improvement of a wire rod laying device, in which a wire guide composed of a long metal outer pipe and a plurality of carbon single-unit lubrication pipes is shown. However, fixing of multiple carbon single-lubricated pipes and long outer pipes is based on a stopper on the outlet side, and impact and vibration during the introduction of steel, etc., or collision between carbon single-lubricated pipes at this time There was a problem that it was damaged and scattered.
[0008]
[Problems to be solved by the invention]
The present invention has been made in view of such problems of the prior art, and the object of the present invention is to break due to impact when the steel material to be introduced enters and scattering due to breakage. It has sufficient crack resistance to prevent it from occurring, or even if it breaks, it will not scatter, so damage to the rolling line of steel can be suppressed, and steel materials that are introduced with a stable structure etc. It is an object of the present invention to provide a sleeve guide that can stably guide a steel material and the like for a long period of time without damage caused by impact and vibration caused by entering, or separation of components.
[0009]
[Means for Solving the Problems]
That is, according to the present invention, a sleeve guide having a double structure in which an outer cylindrical portion made of a metal material is fitted to the outer peripheral portion of the inner cylindrical portion and the inner cylindrical portion used in a steel rolling line. And using an outer peripheral cylindrical body having an inner diameter smaller than the outer diameter of the inner cylindrical cylindrical body, a part of the body portion in the axial direction of the outer peripheral cylindrical body is cut away, and the inner cylindrical cylindrical body is A steel material guide sleeve guide is provided which is press-fitted into a body and fixed.
[0010]
Further, according to the present invention, a double-structure sleeve guide used in a steel material rolling line, in which an outer cylindrical portion made of a metal material is fitted to an outer peripheral portion of the inner cylindrical portion and the inner cylindrical portion. A sleeve guide for a steel material guide is provided, wherein the outer peripheral cylindrical body is fitted to the inner cylindrical cylindrical body while being heated and expanded in size by thermal expansion, and is fixed by cooling. Is done.
[0011]
Furthermore, according to the present invention, a sleeve guide having a double structure in which an outer cylindrical portion made of a metal material is fitted to an outer peripheral portion of an inner cylindrical portion cylindrical body and the inner cylindrical portion cylindrical body, which is used in a steel material rolling line. The outer peripheral cylindrical body is fixed to the inner cylindrical cylinder, with one end of the outer cylindrical body and one end of the inner cylindrical cylinder as a tapered portion having a diameter smaller than each of the straight cylinder partial cross sections. A steel guide sleeve guide is provided.
[0012]
In the present invention, the material of the inner cylindrical portion is preferably made of any one of a ceramic material, a carbon material, a carbon composite material, and a ceramic composite material.
As the ceramic material, it is preferable that any one of silicon nitride, sialon, zirconia, silicon carbide, and alumina is a main phase, and the carbon material is composed of graphite or matrix-like carbon fiber and carbon powder. It is preferably made of a C / C composite. The carbon composite material is preferably composed of a SiC-based composite material or a Si-SiC-based composite material. Furthermore, the ceramic composite material is made of a material obtained by mixing and sintering two or more of silicon nitride, sialon, zirconia, silicon carbide, alumina, SiC-based composite material, and Si-SiC-based composite material. It is preferable.
[0013]
In the present invention, the material of the outer peripheral cylindrical body is preferably made of heat resistant steel such as stainless steel.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the steel material guide sleeve guide is made of a cylindrical material made of a ceramic material, a carbon material, a carbon composite material, or a ceramic composite material, and a metal material such as stainless steel on the outer periphery of the cylindrical body. It was set as the double structure which fitted the outer peripheral part cylindrical body which consists. And, as a means for fixing the inner cylindrical part cylinder and the outer peripheral part cylindrical body, that is, a method of making a double structure, the spring force due to the elasticity of the outer peripheral member quality is used, and also depending on the temperature of the outer peripheral member quality. Utilizing the expansion and contraction phenomenon and further narrowing down the circular end surface opposite to the direction in which the steel material or the like enters. As a result, sufficient crack resistance is imparted to the steel guide sleeve guide, and within a short period of use, cracks caused by impact when the introduced steel material enters, and scattering due to breakage occur. Can prevent damage to the rolling line of steel because it does not scatter even if it breaks or breaks. Also, the structure is stable and damage caused by vibration and vibration when introduced steel, etc. enters. In addition, there is no detachment of component parts and the like, and steel materials can be guided stably for a long period of time.
[0015]
In other words, on the outside of the double structure, a metal material that is strong against impact and has excellent fracture resistance is used. In order to compensate for the low wear resistance of the metal material and the property of easily scratching steel, etc. Use ceramic materials, carbon materials, carbon composite materials, or ceramic composite materials that are inferior in fracture resistance but excellent in wear resistance and solid lubricity for the parts that come into contact with steel materials, etc., inside the structure. By fixing the double structure by using the spring force due to the elasticity of the material, using the expansion and contraction phenomenon due to the temperature of the outer peripheral material, and narrowing the circular end surface opposite to the direction in which the steel material enters, The above-mentioned characteristics can be imparted to the steel material guide sleeve guide.
[0016]
In the present invention, the use and type of the sleeve guide are not particularly limited, and any sleeve guide may be used as long as it is used for introducing a steel material or the like.
[0017]
The processing flow of the wire rod rolling mill in which the steel material guide sleeve guide is used is as shown in FIG. In addition to the sleeve guide used for introduction of the laying head 54, the sleeve guide is used for introduction into the water cooling zone 53. These sleeve guides are formed by fitting an inner cylindrical part made of a ceramic material, a carbon material, a carbon composite material, or a ceramic composite material, and an outer cylindrical part made of a metal material to the outer peripheral part of the cylindrical body. It will consist of a heavy structure.
[0018]
FIG. 1 is an explanatory view showing an embodiment of a steel guide sleeve guide having a structure in which a body portion in the axial direction of an outer peripheral cylindrical body is partially cut out of a steel guide sleeve guide according to the present invention. (a) is a cross-sectional view of the inner cylindrical part single body, (b) is a cross-sectional view of the outer peripheral cylindrical body, (c) is a cross-sectional view taken along line AA of (b), and (d) is the inner cylindrical part and the outer peripheral part. Sectional drawing of the axial direction in the state which fitted | fitted, (e) is BB sectional drawing of (d). The steel material guide sleeve guide 16 has a structure in which the outer peripheral cylindrical body 11 is fitted to the outside of the inner cylindrical cylindrical body 12.
[0019]
The steel guide sleeve guide 16 is composed of an outer peripheral cylindrical body 11 using a material having excellent fracture resistance and an inner cylindrical cylinder 12 using a material having excellent solid lubricity and wear. As a means for fitting the outer peripheral portion to the inner cylindrical portion, the spring force due to the elasticity of the outer peripheral member quality is used. That is, if the inner diameter of the outer cylindrical portion 11 is smaller than the outer diameter of the inner cylindrical portion 12, the axial portion of the outer cylindrical portion 11 is cut out, and the notched portion 13 is expanded. The inner diameter of the outer cylindrical portion 11 is larger than the outer diameter of the inner cylindrical portion 12, and this machine causes the inner cylindrical portion to be inserted into the outer peripheral portion. If the notch portion 13 is stopped from being spread out, the outer peripheral cylindrical body 11 comes into close contact with the inner cylindrical cylindrical body 12 by the spring force due to the elasticity of the outer peripheral member quality. The inner diameter dimension of the outer peripheral cylindrical body 11 is set each time depending on conditions such as the material and thickness of the outer peripheral cylindrical body 11.
[0020]
FIG. 2 is an explanatory view showing an embodiment of a steel guide sleeve guide which is fixed by shrink-fitting an outer peripheral cylindrical body to an inner cylindrical cylinder of the steel guide sleeve guide according to the present invention. ) Is a cross-sectional view of the inner cylindrical part single body, (b) is a cross-sectional view of the outer peripheral cylindrical body, (c) is a cross-sectional view taken along line AA of (b), and (d) is a view of the inner cylindrical part and the outer peripheral part. Sectional drawing of the axial direction in the state fitted, (e) is BB sectional drawing of (d). The steel material guide sleeve guide 26 has a structure in which the outer peripheral cylindrical body 21 is fitted to the outer side of the inner cylindrical cylindrical body 22.
[0021]
The steel guide sleeve guide 26 is composed of an outer peripheral cylindrical body 21 using a material having excellent fracture resistance and an inner cylindrical cylinder 22 using a material having excellent solid lubricity and wear. As a means for fitting the outer peripheral portion to the inner cylindrical portion, the expansion and contraction phenomenon due to the temperature of the outer peripheral member quality is utilized. That is, the inner cylinder portion cylinder 21 is slightly smaller in inner diameter than the outer diameter of the inner cylinder portion 22, and the outer cylinder portion 21 is heated and expanded in size by thermal expansion. The outer peripheral cylindrical body 21 is brought into close contact with the inner cylindrical cylindrical body 22 by being fitted to the body 22 and cooled to be contracted and fastened. The inner diameter dimension of the outer peripheral cylindrical body 21 is set each time depending on conditions such as the material and thickness of the outer peripheral cylindrical body 21 and the material of the inner cylindrical cylindrical body 22.
[0022]
FIG. 3 shows a steel guide having a structure in which the outer peripheral cylindrical body and the inner cylindrical cylinder of the sleeve guide for steel guide according to the present invention are narrowed down by a circular end surface opposite to the direction in which the steel or the like enters. FIG. 6A is an explanatory view showing an embodiment of a sleeve guide, FIG. 5A is a cross-sectional view of a single cylindrical body, FIG. 5B is a cross-sectional view of a single cylindrical cylinder, and FIG. A sectional view, (d) is a sectional view in the axial direction in a state where the inner cylinder portion and the outer peripheral portion are fitted, and (e) is a sectional view taken along the line BB in (d). The steel material guide sleeve guide 36 has a structure in which an outer peripheral cylindrical body 31 is fitted to the outside of the inner cylindrical cylindrical body 32.
[0023]
The steel guide sleeve guide 36 is composed of an outer peripheral cylindrical body 31 using a material excellent in breakage resistance and an inner cylindrical cylindrical body 32 using a material excellent in solid lubricity and wear. As a means for fitting the outer peripheral part to the inner cylindrical part, both the inner cylindrical part 32 and the outer peripheral cylindrical body 31 narrow down the circular end face opposite to the direction in which the steel material or the like enters. The inner cylindrical portion 31 has an inner diameter that is larger than the outer diameter of the inner cylindrical portion 32 by about 0 to 0.05 mm, and the inner cylindrical portion 32 is inserted into the outer cylindrical portion 31. The circular end surface opposite to the direction in which the material enters, etc. has a diameter smaller than the cross section of the straight body portion, i.e., a tapered portion where the diameter continuously decreases toward the end surface at a constant rate in the cross section viewed from the radial direction. By narrowing down by having, outer peripheral part cylindrical body 31 closely_contact | adheres to inner cylinder part cylindrical body 32. FIG.
[0024]
FIG. 4 shows the three means shown in FIGS. 1 to 3 as means for fitting the outer cylinder to the inner cylinder according to the present invention, that is, the spring force due to the elasticity of the outer member. Implementation of a steel guide sleeve guide 46 that employs all of the following means: a means for utilizing the expansion and contraction phenomenon caused by the temperature of the outer peripheral member material, and a means for narrowing the circular end surface opposite to the direction in which the steel material or the like enters. It is explanatory drawing which shows a form, (a) is sectional drawing of an inner cylinder cylindrical single-piece | unit, (b) is sectional drawing of an outer peripheral cylindrical body single-piece | unit, (c) is AA sectional drawing of (b), (d ) Is a cross-sectional view in the axial direction in a state in which the inner cylinder portion and the outer peripheral portion are fitted, and (e) is a BB cross-sectional view of (d). The steel guide sleeve guide 46 has a structure in which an outer peripheral cylindrical body 41 is fitted to the outside of the inner cylindrical cylindrical body 42.
In addition, the means for fitting the outer peripheral cylindrical body to the inner cylindrical cylindrical body in the present invention can be employed by combining any two of the three means.
[0025]
In the steel material guide sleeve guides 16, 26, 36, 46 of FIGS. 1 to 4, the steel material product enters from the steel material introduction parts 14, 24, 34, 44. At this time, the steel material is the inner cylinder cylindrical bodies 12, 22. , 32 and 42 are in contact with each other. Accordingly, the material of the inner cylindrical portion needs to have solid lubricity that has high wear resistance and is unlikely to damage the product, and ceramic materials, carbon materials, carbon composite materials, ceramic composite materials, and the like are selected.
[0026]
1-4, when the steel product enters from the steel material introduction portions 14, 24, 34, 44, the sleeve guide vibrates, and the rolling line apparatus main body Because it is not completely fixed, small collisions are repeated. Therefore, the material of the outer peripheral cylindrical bodies 11, 21, 31, 41 needs to have high impact resistance, and a metal material or the like is selected.
[0027]
In the present invention, the ceramic material used for the inner cylindrical portion is preferably a material having any one of silicon nitride, sialon, zirconia, silicon carbide, and alumina as a main phase.
[0028]
In the present invention, the carbon material used for the inner cylindrical portion is preferably graphite or a C / C composite material made of matrixed carbon fiber and carbon powder.
[0029]
In the present invention, the SiC-based composite material used for the inner cylindrical portion is composed of silicon carbide, carbon fibers, and a carbon component other than carbon fibers, and a skeleton and a matrix formed around the skeleton. A SiC-C / C composite composite material having a structure consisting of
[0030]
In the present invention, the Si-SiC based composite material used for the inner cylindrical portion may be a material having a structure in which a basic skeleton composed of a C / C composite is surrounded by a matrix composed of a Si-SiC based material. preferable.
[0031]
In the present invention, the ceramic composite material used for the inner cylindrical portion is any two of silicon nitride, sialon, zirconia, silicon carbide, alumina, SiC-based composite material, and Si-SiC-based composite material. A material obtained by mixing and sintering the above is preferable.
[0032]
【Example】
EXAMPLES Hereinafter, although this invention is demonstrated in more detail using an Example, this invention is not limited to these Examples.
[0033]
Example 1
Silicon nitride was used as a member of the inner cylinder cylindrical body constituting the double structure steel guide sleeve guide. Further, stainless steel was used as a member of the outer peripheral cylindrical body. In the wire rolling mill shown in FIG. 5, a set of steel guide sleeve guides having an outer diameter of 43 mm, an inner diameter of 25 mm, and a length of 43 mm, which is formed by fitting a silicon nitride pipe inside a stainless steel pipe processed from these materials. (15 pieces) were attached to the inlet side of the laying head 54. As shown in FIGS. 7A and 7B, 15 steel guide sleeve guides were inserted in series into the metal pipe, and a stopper was welded to both ends of the metal pipe and fixed. The wire 51 was introduced into the laying head 54 via the steel material guide sleeve guide, and the total passing weight of the wire 51 and the breakage of the sleeve guide were observed. The same observation was performed five times with a five-type sleeve guide manufactured under the same conditions. The results are shown in Table 1.
[0034]
The cylinder of silicon nitride was manufactured as follows. A predetermined amount of binder is added to the silicon nitride raw material, mixed and dried and granulated, and the resulting granulated raw material is filled into a molding die composed of a rubber mold, molded by an isostatic press, and an outer diameter of 50 mm. A molded body having an inner diameter of 30 mm and a length of 55 mm was produced. Next, this molded body was processed into a predetermined shape with an NC lathe and calcined at 400 ° C. in the air to remove the binder, and then fired at 1700 ° C. in a nitrogen atmosphere under normal pressure for 1 hour to obtain a sintered body. Next, the obtained sintered body was processed into an outer diameter of 39 mm, an inner diameter of 25 mm, and a length of 43 mm using a metal bond diamond grindstone, and the outer diameter edge portion on the opposite side to the direction in which the steel material enters was in the axial direction. The inner cylinder part cylindrical body of silicon nitride was manufactured by tapering and finishing 3 mm at 15 °.
On the other hand, the cylindrical body of stainless steel narrows the stainless steel pipe (outer diameter 42 mm, inner diameter 38 mm, length 43 mm) so that the inner diameter side on one side is 3 mm in the axial direction and 15 ° taper, and further has a width of 2 mm in the axial direction. Produced by notching.
[0035]
(Example 2)
As a member of the inner cylindrical portion cylindrical body constituting the sleeve guide for the double structure steel material guide, a Si / SiC composite material obtained by impregnating silicon and silicon carbide into a C / C composite and firing was used. A steel guide sleeve guide similar to that of Example 1 was prepared except for the member of the inner cylindrical portion, and the cracking state of the sleeve guide was observed under the same conditions as in Example 1. The results are shown in Table 1.
[0036]
(Comparative Example 1)
A steel guide sleeve guide having an outer diameter of 43 mm, an inner diameter of 25 mm, and a length of 43 mm is manufactured using silicon nitride as a member of a sleeve guide for a steel guide that is not a double structure, and the sleeve is formed under the same conditions as in the first embodiment. The state of breakage of the guide was observed. The results are shown in Table 1.
[0037]
(Comparative Example 2)
Steel member with an outer diameter of 43 mm, an inner diameter of 25 mm, and a length of 43 mm, using a Si / SiC composite material obtained by impregnating silicon and silicon carbide into a C / C composite and firing as a sleeve guide member for a steel material guide that is not a double structure A sleeve guide for guide was prepared, and the breakage state of the sleeve guide was observed under the same conditions as in Example 1. The results are shown in Table 1.
[0038]
(Discussion)
When the steel material guide sleeve guide of Comparative Example 1 using silicon nitride and not having a double structure was used, the sleeve guide was immediately damaged and scattered, leading to line stoppage. The total wire passing weight at this time was 2000 to 3000 kg.
Further, even when the steel material guide sleeve guide of Comparative Example 2 using a Si—SiC based composite material and not having a double structure was used, the sleeve guide was cracked and scattered early and the line was stopped. The total wire passing weight at this time was 3000 to 4000 kg.
On the other hand, when a sleeve guide for a double structure steel material guide having a stainless steel pipe arranged on the outer peripheral portion is used, in the first embodiment in which silicon nitride is used as a member of the inner cylindrical portion, the sleeve guide is broken. No cracks were observed. The total wire passing weight at this time was 80000 kg. Further, in Example 2 in which the Si-SiC composite material was used as the member of the inner cylindrical portion, cracking of the sleeve guide was confirmed when the total wire passing weight was 50000 kg, but it was not scattered. It did not stop.
[0039]
[Table 1]
Figure 0004209067
[0040]
【The invention's effect】
As described above, according to the present invention, the steel material etc. which is excellent in breakage resistance, does not crack even when used for a long time as a steel material introduction port, and has a stable structure. Since there is no damage due to impact and vibration when entering, or removal of component parts, the life of the sleeve guide for steel material guide can be extended, that is, the maintenance frequency of the rolling line of wire rod and bar steel can be reduced, so steel material etc. The manufacturing cost of the product can be reduced. In addition, even if the inner cylindrical part of the sleeve guide for the steel guide is broken, the outer cylindrical part can prevent scattering, so that damage to the rolling line of the steel can be suppressed, and products such as steel Can contribute to reducing the manufacturing cost.
[Brief description of the drawings]
1A and 1B are explanatory views showing an embodiment of a steel material guide sleeve guide according to the present invention, in which FIG. 1A is a cross-sectional view of a single inner cylindrical body, FIG. 1B is a cross-sectional view of a single outer peripheral cylindrical body, (c) is AA sectional drawing of (b), (d) is sectional drawing in the state which fitted the inner cylinder part and the outer peripheral part, (e) is BB sectional drawing of (d).
FIGS. 2A and 2B are explanatory views showing another embodiment of the steel guide sleeve guide according to the present invention, in which FIG. 2A is a cross-sectional view of a single inner cylindrical body, FIG. 2B is a cross-sectional view of a single outer peripheral cylindrical body, (C) is AA sectional drawing of (b), (d) is sectional drawing in the state which fitted the inner cylinder part and the outer peripheral part, (e) is BB sectional drawing of (d).
FIGS. 3A and 3B are explanatory views showing another embodiment of the steel guide sleeve guide of the present invention, in which FIG. 3A is a cross-sectional view of a single inner cylindrical body, FIG. 3B is a cross-sectional view of a single outer peripheral cylindrical body, (C) is AA sectional drawing of (b), (d) is sectional drawing in the state which fitted the inner cylinder part and the outer peripheral part, (e) is BB sectional drawing of (d).
FIGS. 4A and 4B are explanatory views showing still another embodiment of the steel guide sleeve guide according to the present invention, in which FIG. 4A is a cross-sectional view of an inner cylindrical cylindrical body, and FIG. 4B is a cross-sectional view of an outer peripheral cylindrical body; (C) is AA sectional drawing of (b), (d) is sectional drawing in the state which fitted the inner cylinder part and the outer peripheral part, (e) is BB sectional drawing of (d). .
FIG. 5 is a flow example of a general wire rod rolling mill in which a steel material guide sleeve guide is used.
FIG. 6A is a front view of a steel material guide sleeve guide. (B) is a side view of the steel material guide sleeve guide.
FIG. 7 is an explanatory view showing an embodiment of a steel material guide sleeve guide applied to a laying head, and (a) is an overall side view. (B) is the elements on larger scale of CC section of (a).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Outer peripheral cylindrical body, 12 ... Inner cylinder cylindrical body, 13 ... Notch, 14 ... Steel material introducing | transducing part, 16 ... Sleeve guide for steel material guides, 21 ... Outer peripheral cylinder body, 22 ... Inner cylindrical cylinder body, 24 ... Steel material introduction part, 26 ... Sleeve guide for steel material guide, 31 ... Cylindrical body of outer peripheral part, 32 ... Cylindrical body of inner cylinder part, 34 ... Steel material introduction part, 35 ... Tapered part, 36 ... Sleeve guide for steel material guide, 41 ... Outer periphery Part cylindrical body, 42 ... inner cylinder part cylindrical body, 43 ... notch, 44 ... steel material introduction part, 45 ... taper part, 46 ... sleeve guide for steel material guide, 51 ... wire rod, 52 ... rolling mill, 53 ... water cooling zone, 54 ... Laying head, 55 ... Coil material, 56 ... Stelmore conveyor, 57 ... Sleeve guide for steel material guide, 58 ... Sleeve guide for steel material guide (applied to laying head).

Claims (8)

鋼材の圧延ラインに使用される、内筒部円筒体と前記内筒部円筒体の外周部に金属材料から成る外周部円筒体を嵌合した二重構造の鋼材ガイド用スリーブガイドであって、
前記内筒部円筒体の外径より小さな内径を有する前記外周部円筒体を用いて、前記外周部円筒体の軸線方向の胴体部分を一部切り欠き、前記内筒部円筒体を前記外周部円筒体に圧入し固定することを特徴とする鋼材ガイド用スリーブガイド。
A sleeve guide for a steel guide having a double structure in which an outer cylindrical portion made of a metal material is fitted to an outer peripheral portion of an inner cylindrical portion and the inner cylindrical portion cylindrical body, which is used in a rolling line of a steel material,
Using the outer peripheral cylindrical body having an inner diameter smaller than the outer diameter of the inner cylindrical cylindrical body, a part of the barrel portion in the axial direction of the outer peripheral cylindrical body is partially cut away, and the inner cylindrical cylindrical body is removed from the outer peripheral part. A steel guide sleeve guide, which is press-fitted into a cylindrical body and fixed.
鋼材の圧延ラインに使用される、内筒部円筒体と前記内筒部円筒体の外周部に金属材料から成る外周部円筒体を嵌合した二重構造の鋼材ガイド用スリーブガイドであって、A sleeve guide for a steel guide having a double structure in which an outer cylindrical portion made of a metal material is fitted to an outer peripheral portion of an inner cylindrical portion and the inner cylindrical portion cylindrical body, which is used in a rolling line of a steel material,
前記外周部円筒体の一端部と、前記内筒部円筒体の一端部を、各々の直胴部分断面より小さな径であるテーパー部として、前記外周部円筒体を前記内筒部円筒体に固定することを特徴とする鋼材ガイド用スリーブガイド。The outer peripheral cylindrical body is fixed to the inner cylindrical cylindrical body, with one end of the outer peripheral cylindrical body and one end of the inner cylindrical cylindrical body being tapered portions having a diameter smaller than each of the straight body partial cross sections. A sleeve guide for a steel material guide.
前記内筒部円筒体の材料は、セラミック材料、カーボン材料、カーボン複合材料、及びセラミック複合材料のいずれかの材料から成ることを特徴とする請求項1又は2に記載の鋼材ガイド用スリーブガイド。3. The steel guide sleeve guide according to claim 1, wherein the material of the inner cylindrical portion is made of any one of a ceramic material, a carbon material, a carbon composite material, and a ceramic composite material. 前記セラミック材料が、窒化珪素、サイアロン、ジルコニア、炭化珪素、及びアルミナのうち、いずれか一種を主相とすることを特徴とする請求項3に記載の鋼材ガイド用スリーブガイド。The steel material guide sleeve guide according to claim 3, wherein the ceramic material has a main phase of any one of silicon nitride, sialon, zirconia, silicon carbide, and alumina. 前記カーボン材料が、グラファイト、又はマトリックス化した炭素繊維と炭素粉末から成るC/Cコンポジットからなることを特徴とする請求項3に記載の鋼材ガイド用スリーブガイド。The steel material guide sleeve guide according to claim 3, wherein the carbon material is made of graphite or a C / C composite made of matrix carbon fiber and carbon powder. 前記カーボン複合材料が、SiC系複合材料、又はSi−SiC系複合材料から成ることを特徴とする請求項3に記載の鋼材ガイド用スリーブガイド。4. The steel material guide sleeve guide according to claim 3, wherein the carbon composite material is composed of a SiC-based composite material or a Si-SiC-based composite material. 前記セラミック複合材料が、窒化珪素、サイアロン、ジルコニア、炭化珪素、アルミナ、SiC系複合材料、及びSi−SiC系複合材料のうち、2種以上を混合して焼結させた材料から成ることを特徴とする請求項3に記載の鋼材ガイド用スリーブガイド。The ceramic composite material is made of a material obtained by mixing and sintering two or more of silicon nitride, sialon, zirconia, silicon carbide, alumina, SiC-based composite material, and Si-SiC-based composite material. A steel material guide sleeve guide according to claim 3. 前記外周部円筒体の材料は、ステンレス鋼から成ることを特徴とする請求項1又は2に記載の鋼材ガイド用スリーブガイド。The steel guide sleeve guide according to claim 1 or 2, wherein the material of the outer peripheral cylindrical body is made of stainless steel.
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