JP4368009B2 - Round blade cutting device and cutting edge cutting method of round blade for round blade cutting device - Google Patents
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Description
【０００１】
【発明の属する技術分野】
本発明は例えば、磁気テープ、フィルム、又は帯状の金属箔などの原反を連続して長さ方向にスリットする丸刃切断装置、及びその装置に用いる丸刃の刃先加工方法に関する。
【０００２】
【従来の技術】
磁気テープやフィルムなどのウェブや金属箔などを連続して長さ方向にスリットするための切断装置としては、例えば、実開平６−５８９０号公報や実開平６−５８９３号公報、及び、実開昭６３−１５８７９２号公報や実開昭５８−１７３４９６号公報に示されているような上下丸刃の組み合せからなる切断装置が知られており、それらの代表的なものとしては、図１２及び図１３に示すような丸刃切断装置があげられる。
【０００３】
図１２に示す丸刃切断装置は、第１刃物軸１と第２刃物軸２とが互いに平行に配置されており、その第１刃物軸１には、外径と厚さがそれぞれ所定の寸法からなりその外周にリング状の逃げ溝３２が設けられ逃げ溝３２の反対側外周縁が刃先とされた第１丸刃３が逃げ溝３２を同一方向に向けて所定の数だけ連続して嵌合固定されている。一方、第２刃物軸２には、前記第１丸刃３の厚さとほぼ等しい厚さからなりその外周にリング状の装着段部５２が設けられている刃物ホルダー５が装着段部５２を同一方向に向けて連続して嵌合固定されており、その刃物ホルダー５の装着段部５２にはリング状の薄丸刃からなる第２丸刃４が軸心方向に移動可能に装着されている。そして第２丸刃４の背側には皿ばね６が装着されており、皿ばね６の付勢力によって第２丸刃４はいくぶん皿形形状に変形され、第１丸刃３の刃先の垂直面に対して若干の逃げ角（図示せず）が存在している。
【０００４】
この状態で少なくとも前記第２刃物軸２を軸心方向に移動させてリング状の薄丸刃からなる第２丸刃４の刃先側面４１を第１丸刃３の刃先側面３１に接触させてから更に所定量だけ押し込むことによって、第１丸刃３の刃先側面３１に第２丸刃４の刃先側面４１が所定の側圧で押されるようになっている。そして、この状態において第１刃物軸１と第２刃物軸２とをそれぞれ切断方向に回転させてやることによって両刃物軸の間に通された被切断帯としてのフィルムなどが所定の条数にスリットされる。
【０００５】
次に、図１３に示す丸刃切断装置は、図１２に示した丸刃切断装置と同様に第１刃物軸１と第２刃物軸２とは平行に配置されており、その第１刃物軸１には、外径と厚さがそれぞれ所定の寸法からなりその外周に逃げ溝３２が設けられその逃げ溝３２側の外周縁が刃先とされた第１丸刃３が逃げ溝３２を同一方向に向けて所定の数だけ連続して嵌合固定されている。そしてこの第１丸刃３の刃先側面３１には一般的には逃げ角αが設けられている。
【０００６】
一方、第２刃物軸２には、前記第１丸刃３の厚さとほぼ等しい厚さからなりその外周にリング状の装着段部５２が設けられている刃物ホルダー５が装着段部５２を同一方向に向けて連続して嵌合固定されており、その刃物ホルダー５の装着段部５２には刃先側面に逃げ角βが設けられた皿形形状の薄丸刃からなる第２丸刃４が装着されている。そして第２丸刃４の背側には皿ばね６、または前記の実開平６−５８９０号公報の図８に示されているようなリング状のコイルスプリングなどが装着されており、少なくとも前記第２刃物軸２を軸心方向に移動させて皿形形状の薄丸刃からなる第２丸刃４の刃先側面４１を第１丸刃３の刃先側面３１に接触させてから更に所定量だけ押し込むことによって、第１丸刃３の刃先側面３１に第２丸刃４の刃先側面４１が所定の側圧で押されるようになっている。そして、この状態において、第１刃物軸１と第２刃物軸２とをそれぞれ切断方向に回転させてやることによって両刃物軸の間に通されたフィルムなどが所定の条数にスリットされるようになっている。
【０００７】
【発明が解決しようとする課題】
しかし、図１２及び図１３に示した丸刃切断装置においては、第１丸刃３と第２丸刃４の一方または両方の丸刃の刃先は相手の刃先に対して逃げ角を有する形状であるため、第１丸刃３と第２丸刃４の刃先の接触状態は線接触、或いは点接触となり、両刃先の間に側圧が付与されると刃先に極めて大きな接触面圧が加わることになる。また、従来の丸刃切断装置においては、第１丸刃３と第２丸刃４の材質には、例えば一方が高速度工具鋼（ＳＫＨ）で他方が金型用合金工具鋼（ＳＫＤなど）の組み合わせであったり、両者共に高速度工具鋼、或いは両者共に超硬合金の組み合わせと言うように同じ材質か類似の材質を使用していた。
【０００８】
その結果、両刃先間に側圧が付与されて両刃物軸に回転が与えられると刃先周縁部には瞬時に塑性変形が発生し、刃先は図１４（図面に代わる光学顕微鏡による拡大写真）にその断面を示すように捲れた状態となり、それに続いて刃先にはチッピングが発生する。そして、この状態で被切断帯をスリットすることになるので、スリットされたウェブなどの切り口は良くない状態がしばらく続き、そのまま切断を続けて適度に刃先が摩耗するとチッピングなどによる刃先破壊の進行が止まり、やがて切り口の品質は安定してくるが、安定するまでには多量の被切断ウェブが不満足な切り口のまま製品となりその多くが不良になってしまうという問題があった。また、刃先破壊の進行が減少したとしても刃先周縁部は依然として捲れた状態にあり、刃先先端はシャープな刃先とはならず、また、刃先先端でのクリアランスもゼロにはならないので、特に被切断帯の厚みが薄くなるほど切り口には不安定な状態が現れる。
【０００９】
表１は図１３に示す丸刃切断装置における第１丸刃３と第２丸刃４の刃先に掛かる見掛けの側圧を５００ｇ及び１０００ｇとしたときの刃先の摩耗幅と刃先の接触面圧との関係を示したもので、第１丸刃３の外径を８０ｍｍ、第２丸刃４の外径は９８ｍｍとし、上下刃の噛み込み量を０．３ｍｍとした場合の計算値である。一方、高速度工具鋼（ＳＫＨ２：ビッカース硬度ＨＶ７３０程度）の圧延方向での抗折力は約１８０Ｋｇｆ／ｍｍ2 （直角方向では３００Ｋｇｆ／ｍｍ2 ）とされており、第１丸刃３と第２丸刃４を高速度工具鋼製とした場合には表１より刃先に掛かる見掛けの側圧が５００ｇの場合で摩耗幅１６μｍ前後以下で、また刃先に掛かる見掛けの側圧が１０００ｇの場合で摩耗幅２２μｍ前後以下で塑性変形やチッピングが発生し易いことが理解できる。特に、刃先形状が鋭利な第２丸刃４の方が第１丸刃３に比べてより多くのチッピングが発生することが予想される。
【００１０】
【表１】
【００１１】
次に、別の従来技術として、特開平１−２４６０９４号公報には、上刃と下刃の少なくとも一方の刃先が、径外方に向かって次第に相手側の刃から離れるように面取りがされている裁断用丸刃工具の技術が開示されているが、この従来技術は、一方の刃先部分と相手側の刃との間に間隙、即ちクリアランスを設けるようにして、ウェブの裁断面をウェブ厚さ方向にわたってわざわざ凹凸を有する切り口とし、ウェブの表面上に塗布されている乳剤層を保護する目的で、その乳剤層がウェブ支持体より外側に出ないような切り口とすると言うものであり、一方の刃先の先端は鋭利な刃先とされてはいるが、その刃先先端は相手側の側面とは接触することはないので、この場合でも被切断帯の厚みが薄くなるほど切り口状態は満足出来るものとはならなかつた。
【００１２】
本発明は上述した従来の問題点に鑑みてなされたものであり、環状の丸刃からなる第１丸刃と、その第１丸刃の方向に押されている薄丸刃からなる第２丸刃とによって被切断帯をスリットするときに鋭利な刃先からなる丸刃の刃先に塑性変形やチッピングが起こり難い丸刃切断装置を提供することを目的としており、使い始めの初期段階から切り口状態の良好なスリット製品を得ることが可能であり、更に被切断帯を実際にスリットする条件とほぼ同じ状態で刃先を加工することによって鋭利な刃先とすると共に、第１丸刃の刃先と第２丸刃の刃先の少なくとも一方の刃先が相手の刃先に対して面で接触するようにして刃先でのクリアランスをゼロに維持し、従来は綺麗に切断することが困難とされていた厚さがミクロンオーダーの極めて薄いフィルムなどでも問題なく綺麗にスリットすることができる丸刃切断装置、及びその装置に用いる丸刃の刃先加工方法を提供することを目的としている。
【００１３】
【課題を解決するための手段】
特許を受けようとする第１発明は、第１丸刃を備えた第１刃物軸と、第１丸刃に対応する第２丸刃を備えた第２刃物軸とを有し、第１丸刃の刃先と第２丸刃の刃先とによって第１刃物軸と第２刃物軸との間に通された被切断帯を長さ方向にスリットする丸刃切断装置であって、第１丸刃は環状の丸刃とされ、第２丸刃は第１丸刃の方に押されている薄丸刃とされている丸刃切断装置において、第１丸刃と第2丸刃のうちの一方の丸刃はビッカース硬度がＨＶ１３５０以上の超硬合金からなり、他方の丸刃はビッカース硬度がＨＶ８３２以下の各種工具鋼からなり、一方の丸刃の刃先側面は軸直角に形成され、他方の丸刃には逃げ角が形成され、一方の丸刃の刃先側面と他方の丸刃の刃先先端とを被切断帯を切断する為の所定の側圧力で接触させ、被切断帯を切断する前の初期段階で、少なくとも他方の丸刃を備えた方の刃物軸を少なくとも１回転させて、一方の丸刃の刃先側面によって他方の丸刃の刃先を切削することにより、他方の丸刃の刃先側面側周縁部に微小でほぼ均一な刃先平面部と鋭利な刃先線が形成され、該刃先線を含んだ前記刃先平面部と前記一方の丸刃の刃先側面とが面接触になるようにしたことを特徴とする丸刃切断装置である。
【００１４】
第１発明は、第１丸刃と第２丸刃のうちの一方の丸刃を硬度の高い超硬合金によって形成し、他方の丸刃を各種工具鋼によって形成し、一方の丸刃の軸直角な刃先側面と、逃げ角が形成された他方の丸刃の刃先とをフィルムなどのスリット作業に取り掛かる前の段階で、実際のスリット作業とほぼ同じ側圧力で接触させて好ましくは両刃物軸を少なくとも１回転させることにより一方の丸刃の刃先によって他方の丸刃の刃先側面側周縁部に微小でほぼ均一な刃先平面部が形成された丸刃切断装置なので、ウェブなどの被切断物のスリットにおいては刃先に塑性変形やチッピングなどの発生が起り難くなり、最初の切断から切り口状態の良好なスリット製品を得ることができるようになる。また、他方の丸刃の刃先平面部と一方の丸刃の刃先側面とが密着し、他方の丸刃の刃先先端に鋭利な刃先線が形成されることで、他方の丸刃の刃先先端でのクリアランスがゼロになるので、厚さがミクロンオーダーの極めて薄いフィルムも綺麗に切断することができるようになる。
【００１５】
特許を受けようとする第２発明は、複数の第１丸刃を備えた第１刃物軸と、第１丸刃に対応する複数の第２丸刃を備えた第２刃物軸とを有し、第１丸刃の刃先と第２丸刃の刃先とによって第１刃物軸と第２刃物軸との間に通された被切断帯を長さ方向に複数状にスリットする丸刃切断装置であって、第１丸刃は環状の丸刃とされ、第２丸刃は第１丸刃の方に押されている薄丸刃とされている丸刃切断装置において、第１丸刃と第2丸刃のうちの一方の丸刃はビッカース硬度がＨＶ１３５０以上の超硬合金からなり、他方の丸刃はビッカース硬度がＨＶ８３２以下の各種工具鋼からなり、一方の丸刃の刃先側面は軸直角に形成され、他方の丸刃には逃げ角が形成され、一方の丸刃の刃先側面と前記他方の丸刃の刃先先端とを被切断帯を切断する為の所定の側圧力で接触させ、被切断帯を切断する前の初期段階で、少なくとも他方の丸刃を備えた方の刃物軸を少なくとも１回転させて、一方の丸刃の刃先側面によって他方の丸刃の刃先を切削することにより、
他方の丸刃の刃先側面側周縁部に微小でほぼ均一な刃先平面部と鋭利な刃先線が形成され、該刃先線を含んだ前記刃先平面部と前記一方の丸刃の刃先側面とが面接触になるようにしたことを特徴とする丸刃切断装置である。
【００１６】
第２発明は、第１刃物軸と第２刃物軸にそれぞれ複数の第１丸刃と複数の第２丸刃を設け、前記第１発明における上下一対の丸刃を複数対備えた丸刃切断装置としたものであり、フィルムなどの被切断帯を多数条にスリットする場合においてもそれぞれの丸刃の刃先には塑性変形やチッピングなどの発生が起こり難く、スリットされた各帯状体の切り口状態は良好なものとなる。
【００１７】
特許を受けようとする第３発明は、環状の第１丸刃を備えた第１刃物軸と、前記第１丸刃の方向に押されている薄丸刃からなる第２丸刃を備えた第２刃物軸とを有し、前記第１丸刃の刃先と前記第２丸刃の刃先とによって前記第１刃物軸と前記第２刃物軸との間に通された被切断帯を長さ方向にスリットする丸刃切断装置に用いる丸刃の刃先加工方法において、 第１丸刃と第２丸刃のうちの一方の丸刃をビッカース硬度がＨＶ１３５０以上の超硬合金とし、他方の丸刃をビッカース硬度がＨＶ８３２以下の各種工具鋼とし、一方の丸刃の刃先側面を軸直角に形成し、他方の丸刃には逃げ角を形成し、一方の丸刃の刃先側面と他方の丸刃の刃先先端とを被切断帯を切断する為の所定の側圧力で接触させ、被切断帯を切断する前の初期段階で、少なくとも他方の丸刃を備えた方の刃物軸を少なくとも１回転させて、一方の丸刃の刃先側面によって他方の丸刃の刃先側面側周縁部に微小でほぼ均一な刃先平面部と他方の丸刃の刃先先端に鋭利な刃先線を形成し、該刃先線を含んだ前記刃先平面部と一方の丸刃の刃先側面とが面接触になるように他方の丸刃の刃先を切削することを特徴とする丸刃切断装置用丸刃の刃先加工方法である。
【００１８】
第３発明は、第１丸刃と第２丸刃のうちの一方の丸刃を硬度の高い超硬合金によって形成し、他方の丸刃を各種工具鋼によって形成し、一方の丸刃の軸直角な刃先側面と、逃げ角が形成された他方の丸刃の刃先とをフィルムなどのスリット作業に取り掛かる前の段階で、実際のスリット作業とほぼ同じ側圧力で接触させて好ましくは両刃物軸を少なくとも１回転させることにより一方の丸刃の刃先によって他方の丸刃の刃先側面側周縁部を切削するようにした丸刃の加工方法なので、他方の丸刃の刃先に対して簡単に微小でほぼ均一な刃先平面部を形成することができるようになる。また本発明は硬度の低い方の材質によって形成されている刃物軸のみを回転させることによってもなし得るが、第１刃物軸と第２刃物軸の両方を回転させる方が好ましい。
【００１９】
また、この第３発明が実施された上下一対の丸刃をそれぞれの刃物軸から取り外し、新たな上下一対の丸刃をそれぞれ第１刃物軸と第２刃物軸に組み込んでこの新たに組み込まれた上下一対の丸刃によって同様に第３発明を実施し、この作業を繰り返すことにより、所定数の上下丸刃対を準備してこれらを前記の第２発明の丸刃切断装置に組み込むことも可能である。また、この場合、より硬度の高い材質によって形成されている丸刃は交換せずに、硬度の低い丸刃のみを交換することによって第２丸刃の全数を加工仕上げすることも可能である。
【００２０】
特許を受けようとする第４発明は、環状の第１丸刃を複数備えた第１刃物軸と前記第１丸刃の方向に押されている薄丸刃からなる第２丸刃を複数備えた第２刃物軸とを有し、前記第１丸刃の刃先と前記第２丸刃の刃先とによって前記第１刃物軸と前記第２刃物軸との間に通された被切断帯を長さ方向に複数条にスリットする丸刃切断装置に用いる丸刃の刃先加工方法において第１丸刃と第２丸刃のうちの一方の丸刃をビッカース硬度がＨＶ１３５０以上の超硬合金とし、他方の丸刃をビッカース硬度がＨＶ８３２以下の各種工具鋼とし、一方の丸刃の刃先側面を軸直角に形成し、他方の丸刃には逃げ角を形成し、一方の丸刃の刃先側面と他方の丸刃の刃先先端とを被切断帯を切断する為の所定の側圧力で接触させ、被切断帯を切断する前の初期段階で、少なくとも他方の丸刃を備えた方の刃物軸を少なくとも１回転させて、一方の丸刃の刃先側面によって他方の丸刃の刃先側面側周縁部に微小でほぼ均一な刃先平面部と他方の丸刃の刃先先端に鋭利な刃先線を形成し、該刃先線を含んだ前記刃先平面部と一方の丸刃の刃先側面とが面接触になるように他方の丸刃の刃先を切削することを特徴とする丸刃切断装置用丸刃の刃先加工方法である。
【００２１】
第４発明は、第１丸刃と第２丸刃の間に硬度差を設け、第１丸刃の刃先と第２丸刃の刃先とをウェブなどの切断作業に取り掛かる前の段階で、実際のスリット作業とほぼ同じ側圧力で接触させて好ましくは両刃物軸を少なくとも１回転させることにより、より硬度の高い材質からなる一方の丸刃の刃先によって他方の丸刃の刃先側面側周縁部を切削するようにした丸刃の刃先加工方法なので、複数枚備えられた他方の丸刃全数の刃先周縁部に対して簡単に微小でほぼ均一な刃先平面部を形成することができるようになる。また本発明は前記第３発明と同様に硬度の低い方の材質によって形成されている丸刃を備えている方の刃物軸のみを回転させることによってもなし得るが、第１刃物軸と第２刃物軸の両方を回転させる方が好ましい。
【００２２】
【発明の実施の形態】
以下、本発明の実施の形態について図１乃至図３を参照しながら説明する。図において、第１刃物軸１と第２刃物軸２はそれらの軸の少なくとも片側に設けられた軸受け手段（図示せず）によって平行かつ回転自在に軸支されており、その第１刃物軸１と第２刃物軸２とは軸心方向に相対的に微調整移動でき、外部に設けられた駆動手段によって互いに反対方向の回転が与えられるようになっている。そして、図１に示す丸刃切断装置では、第１刃物軸１に外径と厚さが所定の寸法からなる環状の第１丸刃３が嵌合固定されており、第２刃物軸２には皿形形状の薄丸刃からなる第２丸刃４を装着段部５２に装着している刃物ホルダー５が嵌合固定されている。
【００２３】
次に、図２に示す丸刃切断装置では、第１刃物軸１に外径と厚さが所定の寸法からなる環状の第１丸刃３が嵌合固定されており、第２刃物軸２には所定の厚さからなりその外周にリング状の装着段部５２が設けられている刃物ホルダー５が嵌合固定されている。そして、その刃物ホルダー５の装着段部５２には薄丸刃からなる第２丸刃４とその第２丸刃４の背側に皿ばね６とが装着されており、この状態において第２丸刃４は皿ばね６の付勢力によって若干皿形形状に変形されている。
【００２４】
【００２５】
図３に示す丸刃切断装置においては、第１刃物軸１には、外径と厚さが所定の寸法からなりその外周に逃げ溝３２が設けられた第１丸刃３が逃げ溝３２を同一方向に向けて所定枚数だけ連続して嵌合固定されている。そして、図３に示す第１丸刃３は逃げ溝３２の反対側外周縁が刃先とされている。一方、第１刃物軸１と上下で平行に相対している第２刃物軸２には、第１丸刃３の厚さとほぼ等しい厚さからなりその外周にリング状の装着段部５２が設けられている刃物ホルダー５がその装着段部５２を同一方向に向けて連続して嵌合固定されており、その装着段部５２には第２丸刃４とその第２丸刃４の背側に皿ばね６とが装着されている。尚、図３に示す第２丸刃４は皿ばね６の付勢力によって若干皿形形状に変形されているリング状の薄丸刃である。また、図３に示す丸刃切断装置においては第１刃物軸１と第２刃物軸２はその両側に設けられた軸受け手段（図示せず）によって平行かつ回転自在に軸支されている。
【００２６】
そして、図１乃至図３に示した丸刃切断装置のいずれにおいても、第１丸刃３は第２丸刃４に比べてより硬度の高い超硬合金を用い、第２丸刃４は高速度工具鋼、金型用合金工具鋼、炭素工具鋼などの各種工具鋼を用いている。
【００２７】
例えば、従来の高速度工具鋼（ＳＫＨ）製丸刃と金型用合金工具鋼（ＳＫＤ）製丸刃との組み合わせにおいては、前者（ＳＫＨ製丸刃）の硬度がＨＶ７７２〜８３２（ＨＲＣ６３〜６５）であるのに対し、後者（ＳＫＤ製丸刃）の硬度はＨＶ６５３〜６９７（ＨＲＣ５８〜６０）と、その硬度差はせいぜいＨＶ硬度で１８０であるのに対し、超硬合金の硬度はＨＶ１３５０〜１５００と高く、高速度工具鋼製丸刃（ＨＶ７７２〜８３２）や金型用合金工具鋼製丸刃（ＨＶ６５３〜６９７）の硬さと比較した場合その硬度差は大きいものとなる。
【００２８】
いま、平行に軸支されている第１刃物軸１と第２刃物軸２の距離は第１丸刃３の刃先と第２丸刃４の刃先との上下のラップ量が所定の値になるように保持されている。そしてその状態において少なくとも一方の刃物軸を軸心方向に移動させて第２丸刃４の刃先側面４１を第１丸刃３の刃先側面３１に接触させてから更に所定量だけ押し込み、両丸刃の刃先同士が所定の側圧で圧接するようにしてやる。このときの第１丸刃３と第２丸刃４の刃先の関係は拡大的に表現すれば凡そ図４に示す様な状態にあるものと推測される。つまり第２丸刃４は第１丸刃３の方に所定の量だけ押し込まれているので、両刃先は図４の（イ）に示すように、Ｘ点、Ｂ点、Ｙ点を通る刃先が線接触し、第１丸刃３のＸ点を通る垂直断面に対して第２丸刃４の刃先のＡ点は第２丸刃４の回転と共に図４の（ロ）に示すように、Ａ、Ｘ、Ｂ、の順で侵入して行くことになり、Ｘ点における両刃先には相対的に食い込み力が作用することになる。この状態で第１刃物軸１と第２刃物軸２とをそれぞれ反対方向に１回転以上回転させてやることにより、より硬度の高い材質からなる第１丸刃の刃先が切削刃となり、その切削刃となる第１丸刃の刃先によって第２丸刃の刃先が切削加工され、刃先側面側周縁部に微小でほぼ均一な刃先平面部が形成される。
【００２９】
ここで、硬度の低い方の丸刃の刃先に刃先平面部が形成されるためには、その丸刃の刃先側面に逃げ角が設けられて鋭利な刃先となっていることが必要となる。また、硬度が高い方の丸刃の刃先側面と硬度が低い方の丸刃の刃先線を含んだ刃先平面部とを面接触させる為には、硬度が高い方の丸刃の刃先側面が軸直角であることが必要である。
【００３０】
尚、図３では第１丸刃３、及び刃物ホルダー５がそれぞれ互いに隣接固定されているものについて説明したが、スリット幅寸法によっては隣り合う第１丸刃３の間、及び隣り合う刃物ホルダー５の間に所定寸法のスペーサーを介在させることもできるし、また、第１丸刃３、及び刃物ホルダー５をそれぞれ単体で各刃物軸に固定することができる構造にすることによりスペーサーを省くこともできる。また、図３の第１丸刃３は逃げ溝３２の反対側縁が刃先とされた丸刃としたが、逃げ溝３２側の外周縁を刃先とすることもできる。
【００３１】
【実施例】
図５は、本発明の一実施例を説明するための図であり、より硬度の高い材質からなる第１丸刃３の材質として超硬合金を用い、第２丸刃４の材質として高速度工具鋼を用いた場合の丸刃切断装置の両丸刃を示す図であり、第１丸刃３の外径Ｄは８０ｍｍ、第２丸刃４の外径ｄは９８ｍｍ、刃先側面の逃げ角βは３．５°とし、刃先の上下方向のラップ量Ｌは０．５ｍｍとした。図６の（イ）は本発明による刃先加工実施前の第２丸刃４の刃先の断面を示す図面に代わる写真（光学顕微鏡による拡大写真）である。
【００３２】
次に、実際に磁気テープなどを切断するときに第２丸刃４の刃先と第１丸刃３の刃先との間に掛かる見掛けの側圧は５００〜１２００ｇ程度とされているが、本実施例においては、見掛けの側圧を５００ｇ程度とし、この状態において第１刃物軸１と第２刃物軸２をそれぞれ数回転させて第２丸刃４の刃先全周にわたって微小でほぼ均一な切削加工部を形成させた。
【００３３】
図６の（ロ）は、第２丸刃４に形成された切削加工部の断面を示す図面に代わる写真（光学顕微鏡による拡大写真）であり、写真において刃先の切削加工部の刃物幅方向の寸法は約５．５μｍであり、刃物の径方向の寸法は約５５μｍとなり、その切削加工部の状態は図１４に示した従来の塑性変形した刃先とは明らかに異なる刃先形状であり、滑らかな切削面となり、チッピングなどの欠陥は存在しなかった。
【００３４】
図７の（イ）は、切削加工によって排出された切削屑を示す図面に代わる写真〔走査型電子顕微鏡（ＳＥＭ装置）による拡大写真〕であり、図７の（ロ）はその切削屑の断面を示す写真（ＳＥＭ装置による拡大写真）である。そして、その幅は概ね４５μｍ〜５０μｍであった。
【００３５】
図８〜図１０の（イ）はそれぞれ第２丸刃４の刃先を示す図面に代わる写真（ＳＥＭ装置による拡大写真）であり、（ロ）はそれぞれの写真を説明するための図である。また、写真の撮影方向は図８の（ハ）に示すように刃先に対して斜め方向から観察したものである。
【００３６】
まず、図８の（イ）は、未使用状態の刃先の写真であり、その刃先はシャープであることが判る。次に、図９の（イ）は本発明での前記実施例による刃先の切削加工部を観察した写真であり、切削加工部は明らかに滑らかな面となっており刃先もシャープな線となっていることが判る。
【００３７】
これに対し、図１０の（イ）は従来技術における上下刃の組み合せによるものであり、第１丸刃３の材質として金型用合金工具鋼（ＳＫＤ）を用いた場合の第２丸刃４の刃先を観察した写真であり、塑性変形やチッピングによって刃先にはかなりのダメージがあることが判る。
【００３８】
図１１は、図１３に示した従来の材質の組み合わせ（ＳＫＨ材とＳＫＤ材）による丸刃切断装置、及び本発明の丸刃切断装置によって厚さが５μｍのＰＥＴフィルムをスリットしたときの製品の切り口の断面を示す図面に代わる写真（ＳＥＭ装置による拡大写真）であり、図１１の（イ）は従来の丸刃切断装置によるものであり、（ロ）は本発明の丸刃切断装置によるものである。写真から明らかなように従来の丸刃切断装置による切り口には刃先のダメージによって発生したと思われる欠陥（引きちぎり）が現われているが、本発明の丸刃切断装置による切り口にはそのような欠陥は現われなかった。
【００３９】
【発明の効果】
以上説明したように本発明によれば、従来の丸刃切断装置では綺麗な切り口状態を得ることが困難とされていた厚さがミクロンオーダーの極めて薄いフィルムなどでも問題なく綺麗にスリットすることが可能になる。また、硬度の低い方の丸刃の刃先は使い初めの初期段階から相手丸刃の刃先に対して面で接触することになるので良好なスリット条件が長期間にわたって維持される。
【図面の簡単な説明】
【図１】本発明の実施の形態を説明するための丸刃切断装置の上下丸刃の関係を示す概略図である。
【図２】本発明の実施の形態を説明するための別の丸刃切断装置の上下丸刃の関係を示す概略図である。
【図３】本発明の実施の形態を説明するための別の丸刃切断装置の上下丸刃の関係を示す概略図である。
【図４】第１丸刃と第２丸刃の刃先の圧接部の関係を説明するための概略図である。
【図５】本発明の一実施例を説明するための概略図である。
【図６】刃先の断面を示す光学顕微鏡による拡大写真である。
【図７】本発明による刃先加工方法を実施することによって排出された切削屑を示す走査型電子顕微鏡による拡大写真である。
【図８】本発明を実施する前の丸刃の刃先を斜め方向から観察した走査型電子顕微鏡による拡大写真、及びその説明図である。
【図９】本発明を実施した丸刃の刃先を斜め方向から観察した走査型電子顕微鏡による拡大写真、及びその説明図である。
【図１０】従来技術における上下丸刃の組み合わせによる丸刃の刃先を斜め方向から観察した走査型電子顕微鏡による拡大写真、及びその説明図である。
【図１１】被切断ウェブの切り口断面を斜め方向から観察した走査型電子顕微鏡による拡大写真である。
【図１２】従来の丸刃切断装置の一例を説明するための概略図である。
【図１３】従来の丸刃切断装置の別の例を説明するための概略図である。
【図１４】従来技術における上下丸刃の組み合わせによる丸刃の刃先の断面を示す光学顕微鏡による拡大写真である。
【符号の説明】
１ 第１刃物軸
２ 第２刃物軸
３ 第１丸刃
４ 第２丸刃
５ 刃物ホルダー
６ 皿ばね
３１ 第１丸刃の刃先側面
３２ 逃げ溝
４１ 第２丸刃の刃先側面
５２ 装着段部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a round blade cutting apparatus that continuously slits a raw material such as a magnetic tape, a film, or a strip-shaped metal foil in the length direction, and a cutting edge processing method of the round blade used in the apparatus.
[0002]
[Prior art]
As a cutting device for continuously slitting a web such as a magnetic tape or a film or a metal foil in the longitudinal direction, for example, Japanese Utility Model Laid-Open No. 6-5890, Japanese Utility Model Laid-Open No. 6-5893, and A cutting device comprising a combination of upper and lower round blades as shown in Japanese Patent Laid-Open No. 63-158792 and Japanese Utility Model Laid-Open No. 58-17396 is known.12And figure13A round blade cutting device as shown in FIG.
[0003]
Figure12In the round blade cutting apparatus shown in FIG. 1, the first blade shaft 1 and the second blade shaft 2 are arranged in parallel to each other, and the outer diameter and thickness of the first blade shaft 1 are respectively determined to have predetermined dimensions. A ring-shaped relief groove 32 is provided on the outer periphery, and a first round blade 3 whose outer peripheral edge on the opposite side of the relief groove 32 is a cutting edge is continuously fitted and fixed in a predetermined number with the relief grooves 32 directed in the same direction. Has been. On the other hand, on the second cutter shaft 2, the cutter holder 5 having a thickness substantially equal to the thickness of the first round blade 3 and provided with a ring-shaped mounting step 52 on the outer periphery thereof is the same as the mounting step 52. The second round blade 4 composed of a ring-shaped thin round blade is mounted on the mounting step 52 of the blade holder 5 so as to be movable in the axial direction. . A disc spring 6 is mounted on the back side of the second round blade 4, and the second round blade 4 is deformed somewhat into a dish shape by the urging force of the disc spring 6, and the vertical edge of the first round blade 3 is perpendicular to the tip. There is a slight clearance angle (not shown) with respect to the surface.
[0004]
In this state, at least the second blade shaft 2 is moved in the axial direction to bring the blade tip side surface 41 of the second round blade 4 made of a ring-shaped thin round blade into contact with the blade tip side surface 31 of the first round blade 3. Further, by pushing in a predetermined amount, the cutting edge side surface 41 of the second round blade 4 is pressed against the cutting edge side surface 31 of the first round blade 3 with a predetermined side pressure. In this state, the first cutter shaft 1 and the second cutter shaft 2 are rotated in the cutting direction, respectively, so that a film or the like as a band to be cut passed between the two cutter shafts has a predetermined number of strips. It is slit.
[0005]
Next, figure13The round blade cutting device shown in Fig.12The first blade shaft 1 and the second blade shaft 2 are arranged parallel to each other in the same manner as the round blade cutting apparatus shown in FIG. 1, and the outer diameter and thickness of the first blade shaft 1 are determined from predetermined dimensions. The first round blade 3 having a clearance groove 32 provided on the outer periphery thereof and having an outer peripheral edge on the clearance groove 32 side as a cutting edge is continuously fitted and fixed by a predetermined number with the clearance groove 32 directed in the same direction. Yes. In general, a clearance angle α is provided on the side 31 of the edge of the first round blade 3.
[0006]
On the other hand, on the second cutter shaft 2, the cutter holder 5 having a thickness substantially equal to the thickness of the first round blade 3 and provided with a ring-shaped mounting step 52 on the outer periphery thereof is the same as the mounting step 52. The second round blade 4 made of a plate-shaped thin round blade having a clearance angle β provided on the side surface of the blade tip is continuously fitted and fixed toward the direction, and the mounting step portion 52 of the blade holder 5 is provided with a clearance angle β on the side surface of the blade edge. It is installed. On the back side of the second round blade 4, there is mounted a disc spring 6, or a ring-shaped coil spring as shown in FIG. 2. Move the cutter shaft 2 in the axial direction to bring the blade tip side surface 41 of the second round blade 4 made of a dish-shaped thin round blade into contact with the blade tip side surface 31 of the first round blade 3 and then push it further by a predetermined amount. Thus, the blade tip side surface 41 of the second round blade 4 is pressed against the blade tip side surface 31 of the first round blade 3 with a predetermined side pressure. In this state, the first blade shaft 1 and the second blade shaft 2 are rotated in the cutting direction, respectively, so that the film or the like passed between the two blade shafts is slit to a predetermined number. It has become.
[0007]
[Problems to be solved by the invention]
But figure12And figure13In the round blade cutting apparatus shown in FIG. 1, since the cutting edge of one or both of the first circular blade 3 and the second circular blade 4 has a clearance angle with respect to the other cutting edge, the first circular blade The contact state of the cutting edges of 3 and the second round blade 4 is a line contact or a point contact, and if a side pressure is applied between the two cutting edges, a very large contact surface pressure is applied to the cutting edge. Moreover, in the conventional round blade cutting device, the material of the first round blade 3 and the second round blade 4 is, for example, one of high speed tool steel (SKH) and the other of alloy tool steel for mold (SKD etc.). The same material or similar materials were used, such as a combination of the above, a high-speed tool steel for both, or a combination of cemented carbide for both.
[0008]
As a result, when a side pressure is applied between the cutting edges and rotation is applied to both cutter axes, plastic deformation occurs instantaneously at the peripheral edge of the cutting edge, and the cutting edge is14(Enlarged photograph taken with an optical microscope instead of the drawing) is in a state of being rolled as shown in the cross section, and then chipping occurs at the cutting edge. And in this state, since the band to be cut will be slit, the cut edge of the slit web or the like will continue to be unsatisfactory for a while, and if the cutting edge continues to be cut as it is and the cutting edge is moderately worn, the destruction of the cutting edge due to chipping etc. Although the quality of the cut ends is stabilized, there is a problem that a large amount of the web to be cut remains a product with an unsatisfactory cut and many of them become defective. In addition, even if the progress of the cutting edge destruction decreases, the peripheral edge of the cutting edge is still in a state of being curled, the cutting edge tip is not sharp, and the clearance at the cutting edge tip does not become zero. The thinner the band, the more unstable the cut surface appears.
[0009]
Table 1FIG.Shows the relationship between the wear width of the cutting edge and the contact surface pressure of the cutting edge when the apparent side pressure applied to the cutting edges of the first and second round blades 3 and 4 in the round blade cutting apparatus shown in FIG. Thus, the calculated values are when the outer diameter of the first round blade 3 is 80 mm, the outer diameter of the second round blade 4 is 98 mm, and the amount of biting between the upper and lower blades is 0.3 mm. On the other hand, high-speed tool steel (SKH2:Vickers hardness of about HV730) In the rolling direction is about 180 kgf / mm @ 2 (300 kgf / mm @ 2 in the right angle direction). When the first round blade 3 and the second round blade 4 are made of high-speed tool steel, 1. It can be understood that plastic deformation and chipping are likely to occur when the apparent side pressure applied to the blade edge is less than 16 μm when the apparent side pressure applied to the blade edge is 500 g, and when the wear side width is less than 22 μm when the apparent side pressure applied to the blade edge is 1000 g. . In particular, the second round blade 4 having a sharp cutting edge shape is expected to generate more chipping than the first round blade 3.
[0010]
[Table 1]
[0011]
Next, as another conventional technique, Japanese Patent Laid-Open No. 1-246094 discloses that at least one of the upper blade and the lower blade is chamfered so as to gradually move away from the mating blade toward the outer diameter. In this prior art, a cutting edge of a web is formed by providing a gap, that is, a clearance, between one blade edge portion and the other blade. In order to protect the emulsion layer coated on the surface of the web, the cut should be made so that the emulsion layer does not come out of the web support. Although the tip of the blade tip is a sharp blade tip, the tip of the blade tip does not come into contact with the other side surface, so even in this case, the cutting state can be satisfied as the thickness of the band to be cut decreases. Is RaNakaTsuta.
[0012]
The present invention has been made in view of the above-described conventional problems, and includes a first round blade made of an annular round blade and a second round made of a thin round blade pushed in the direction of the first round blade. The purpose of this is to provide a round blade cutting device in which plastic deformation and chipping hardly occur at the cutting edge of a round blade consisting of a sharp edge when slitting the cut band with the blade. It is possible to obtain a good slit product, and further, the cutting edge is processed in substantially the same state as the actual slitting condition to make a sharp cutting edge, and the cutting edge of the first round blade and the second rounding edge. In the past, it was difficult to cut cleanly so that at least one of the cutting edges of the blade was in contact with the other cutting edge with the surface to maintain the clearance at the cutting edge to zero.Thickness is micron orderAn object of the present invention is to provide a round blade cutting apparatus capable of finely slitting an extremely thin film without any problem, and a cutting edge processing method of the round blade used in the apparatus.
[0013]
[Means for Solving the Problems]
The 1st invention which is going to receive a patent has the 1st cutter axis provided with the 1st round blade, and the 2nd cutter axis provided with the 2nd round blade corresponding to the 1st round blade, and the 1st round A round-blade cutting device for slitting in a length direction a work strip passed between a first blade axis and a second blade shaft by a blade edge of a blade and a blade edge of a second round blade, the first round blade Is a circular cutting blade, and the second circular blade is a thin circular blade pressed toward the first circular blade, and one of the first and second circular blades. Round bladeIs made of cemented carbide with a Vickers hardness of HV1350 or higher, the other round blade is made of various tool steels with a Vickers hardness of HV832 or less, the side surface of one round blade is formed perpendicular to the axis, A clearance angle is formed to cut the band to be cut between the side surface of one round blade and the tip of the other round blade.Contact at a specified side pressure,At the initial stage before cutting the band to be cut, the tool shaft with at least the other round bladeAt least one rotationBy cutting the edge of the other round blade by the side of the edge of one round blade,Small and almost uniform on the side edge of the round bladeA cutting edge plane portion and a sharp cutting edge line are formed, and the cutting edge plane portion including the cutting edge line is in surface contact with the cutting edge side surface of the one round blade.This is a round blade cutting device.
[0014]
The first invention isOne of the first round blade and the second round blade is formed of a cemented carbide with high hardness, and the other round blade is formed of various tool steels.Round bladeThe side of the blade edge perpendicular to the axisThe blade edge of the other round blade with the clearance angle formed is brought into contact with the cutting operation of the film or the like with the same side pressure as that of the actual slitting operation, and preferably the both cutter shafts are rotated at least once. By using the tip of one of the round blades, the edge of the other round blade on the side edge side is minute and almost uniform.Blade edge planeTherefore, it is difficult to cause plastic deformation or chipping at the cutting edge of the slit of a workpiece such as a web, and a slit product having a good cut state can be obtained from the first cutting. It becomes like this.In addition, the blade tip flat part of the other round blade and the blade side surface of one of the round blades are in close contact with each other, and a sharp edge line is formed at the tip of the other round blade. Since the clearance becomes zero, even a very thin film having a thickness of micron order can be cut cleanly.
[0015]
The 2nd invention which is going to receive a patent has the 1st blade axis | shaft provided with the some 1st round blade, and the 2nd blade axis | shaft provided with the some 2nd round blade corresponding to a 1st round blade. A round blade cutting device for slitting a band to be cut, which is passed between the first blade shaft and the second blade shaft, in a plurality of lengths by the blade edge of the first round blade and the blade edge of the second round blade. In the round blade cutting apparatus, the first round blade is an annular round blade, and the second round blade is a thin round blade pushed toward the first round blade. One of the two round bladesIs made of cemented carbide with a Vickers hardness of HV1350 or higher, the other round blade is made of various tool steels with a Vickers hardness of HV832 or less, the side surface of one round blade is formed perpendicular to the axis, A clearance angle is formed for cutting the band to be cut between the side surface of one of the round blades and the tip of the other round blade.Contact at a specified side pressure,At the initial stage before cutting the band to be cut, the tool shaft with at least the other round bladeAt least one rotationThen, by cutting the edge of the other round blade by the side of the edge of the one round blade,
The otherSmall and almost uniform on the side edge of the round bladeA cutting edge plane portion and a sharp cutting edge line are formed, and the cutting edge plane portion including the cutting edge line is in surface contact with the cutting edge side surface of the one round blade.This is a round blade cutting device.
[0016]
The second invention provides a plurality of first round blades and a plurality of second round blades on the first cutter shaft and the second cutter shaft, respectively, and round blade cutting comprising a plurality of pairs of upper and lower round blades in the first invention. Even when slitting multiple strips to be cut, such as films, it is difficult to cause plastic deformation or chipping at the cutting edge of each round blade. Will be good.
[0017]
The 3rd invention which is going to receive a patent provided the 2nd round blade which consists of the 1st blade axis | shaft provided with the cyclic | annular 1st round blade, and the thin round blade pressed in the direction of the said 1st round blade. A length of a band to be cut that is passed between the first blade axis and the second blade axis by the blade edge of the first round blade and the blade edge of the second round blade. In a round blade cutting method used for a round blade cutting device that slits in a direction, one of the first round blade and the second round bladeIs made of cemented carbide with a Vickers hardness of HV1350 or higher, the other round blade is made of various tool steels with a Vickers hardness of HV832 or less, the side surface of one of the round blades is formed perpendicular to the axis, and the clearance angle is formed on the other round blade. To cut the band to be cut from the side surface of one round blade and the tip of the other round blade.Contact at a specified side pressure,At the initial stage before cutting the band to be cut, the tool shaft with at least the other round bladeAt least one rotationThe other round blade by the side of the edge of one round bladeFine and almost uniform on the edge of the blade sideThe other round blade is formed so that a sharp cutting edge line is formed at the cutting edge plane portion and the cutting edge tip of the other round blade, and the cutting edge plane portion including the cutting edge line is in surface contact with the cutting edge side surface of one of the circular cutting edges. The blade edgeIt is a cutting edge processing method of a round blade for a round blade cutting device characterized by cutting.
[0018]
3rd invention is one round blade of the 1st round blade and the 2nd round blade.It is made of cemented carbide with high hardness, and the other round blade is made of various tool steels.Round bladeThe side of the blade edge perpendicular to the axisThe blade edge of the other round blade with the clearance angle formed is brought into contact with the cutting operation of the film or the like with the same side pressure as that of the actual slitting operation, and preferably the both cutter shafts are rotated at least once. This is a round blade processing method in which the edge of the side of the other round blade is cut by the edge of one of the round blades.Blade edge planeCan be formed. Further, the present invention is formed of a material having a lower hardness.Blade axisHowever, it is preferable to rotate both the first tool axis and the second tool axis.
[0019]
Further, the pair of upper and lower round blades in which the third invention is implemented are removed from the respective cutter shafts, and a new pair of upper and lower round blades are incorporated into the first and second cutter shafts, respectively. The third invention is similarly implemented by a pair of upper and lower round blades, and by repeating this operation, a predetermined number of upper and lower round blade pairs can be prepared and incorporated into the round blade cutting apparatus of the second invention. It is. In this case, it is also possible to finish the entire number of the second round blades by exchanging only the low-hardness round blades without replacing the round blades formed of a material having higher hardness.
[0020]
The 4th invention which is going to receive a patent is provided with a plurality of second round blades comprising a first cutter shaft provided with a plurality of annular first round blades and a thin round blade pressed in the direction of the first round blade. A second cutting tool axis, and a cutting band passed between the first cutting tool axis and the second cutting tool axis by the cutting edge of the first round cutting tool and the cutting edge of the second round cutting tool. One of the first round blade and the second round blade in a round blade cutting method used in a round blade cutting device that slits a plurality of strips in the vertical directionIs made of cemented carbide with a Vickers hardness of HV1350 or higher, the other round blade is made of various tool steels with a Vickers hardness of HV832 or less, the side surface of one of the round blades is formed perpendicular to the axis, and the clearance angle is formed on the other round blade. To cut the band to be cut from the side surface of one round blade and the tip of the other round blade.Contact at a specified side pressure,At the initial stage before cutting the band to be cut, the tool shaft with at least the other round bladeAt least one rotationThe other round blade by the side of the edge of one round bladeFine and almost uniform on the edge of the blade sideThe other round blade is formed so that a sharp cutting edge line is formed at the cutting edge plane portion and the cutting edge tip of the other round blade, and the cutting edge plane portion including the cutting edge line is in surface contact with the cutting edge side surface of one of the circular cutting edges. The blade edgeIt is a cutting edge processing method of a round blade for a round blade cutting device characterized by cutting.
[0021]
In the fourth aspect of the present invention, a hardness difference is provided between the first round blade and the second round blade, and at the stage before the cutting edge of the first round blade and the second round blade are started for cutting work such as a web. One of the materials made of a material with higher hardness is preferably brought into contact with approximately the same side pressure as that of the slitting work and preferably by rotating the cutter shaft at least once.Round bladeSince the cutting edge side edge of the other round blade is cut by the cutting edge, the cutting edge processing method of the round blade is simple and almost uniform with respect to the entire number of the other cutting edges of the other round blade.Blade edge planeCan be formed. Further, the present invention is formed of a material having a lower hardness like the third invention.Tool axis with round bladeHowever, it is preferable to rotate both the first tool axis and the second tool axis.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.FIG.Will be described with reference to FIG. In the figure, a first cutter shaft 1 and a second cutter shaft 2 are supported in a parallel and rotatable manner by bearing means (not shown) provided on at least one side of these shafts. And the second cutter shaft 2 can be relatively finely adjusted in the axial direction, and can be rotated in opposite directions by driving means provided outside. In the round blade cutting apparatus shown in FIG. 1, an annular first round blade 3 having an outer diameter and a thickness having predetermined dimensions is fitted and fixed to the first blade shaft 1, and the second blade shaft 2 is fixed. Is fitted and fixed to a blade holder 5 in which a second round blade 4 made of a dish-shaped thin round blade is mounted on a mounting step 52.
[0023]
Next, in the round blade cutting apparatus shown in FIG. 2, an annular first round blade 3 having an outer diameter and a thickness having predetermined dimensions is fitted and fixed to the first blade shaft 1, and the second blade shaft 2. A blade holder 5 having a predetermined thickness and provided with a ring-shaped mounting step 52 on its outer periphery is fitted and fixed. The mounting step 52 of the blade holder 5 is provided with a second round blade 4 made of a thin round blade and a disc spring 6 on the back side of the second round blade 4. In this state, the second round blade 4 is attached. The blade 4 is slightly deformed into a dish shape by the biasing force of the disk spring 6.
[0024]
[0025]
As shown in FIG.In the round blade cutting device, the first round blade 3 having an outer diameter and a thickness having predetermined dimensions and provided with a relief groove 32 on the outer periphery of the first blade shaft 1 has the relief groove 32 directed in the same direction. Thus, a predetermined number of pieces are continuously fitted and fixed. AndFIG.The first round blade 3 shown in FIG.Has been.On the other hand, the second cutter shaft 2 which is vertically opposite to the first cutter shaft 1 has a thickness substantially equal to the thickness of the first round blade 3 and is provided with a ring-shaped mounting step 52 on the outer periphery thereof. The blade holder 5 is fitted and fixed continuously with its mounting step 52 directed in the same direction. The mounting step 52 has a second round blade 4 and a back side of the second round blade 4. A disc spring 6 is attached to the slab. still,FIG.The second round blade 4 shown in FIG. 2 is a ring-shaped thin round blade that is slightly deformed into a dish shape by the biasing force of the disc spring 6.It is.Also,FIG.In the round blade cutting apparatus shown in FIG. 1, the first blade shaft 1 and the second blade shaft 2 are supported in parallel and rotatably by bearing means (not shown) provided on both sides thereof.
[0026]
And FIG. 1 thru | orFIG.In any of the round blade cutting apparatuses shown in FIG.Compared to the second round blade 4HarderA cemented carbide is used, and the second round blade 4 uses various tool steels such as high-speed tool steel, alloy tool steel for molds, and carbon tool steel.
[0027]
For example, in the combination of a conventional high-speed tool steel (SKH) round blade and a mold alloy tool steel (SKD) round blade, the hardness of the former (SKH round blade) is HV 772 to 832 (HRC 63 to 65). The hardness of the latter (SKD round blade) is HV653-697 (HRC58-60), and the difference in hardness is 180 HV hardness at most, whereas the hardness of cemented carbide is HV1350. When compared with the hardness of a high-speed tool steel round blade (HV772 to 832) or a mold alloy tool steel round blade (HV653 to 697), the hardness difference is large.
[0028]
Now, as for the distance between the first blade shaft 1 and the second blade shaft 2 that are supported in parallel, the vertical lap amount between the blade edge of the first round blade 3 and the blade edge of the second round blade 4 becomes a predetermined value. So that it is held. In this state, at least one of the blade shafts is moved in the axial direction so that the blade tip side surface 41 of the second round blade 4 is brought into contact with the blade tip side surface 31 of the first round blade 3 and further pushed in by a predetermined amount. The blade edges are brought into pressure contact with each other with a predetermined lateral pressure. The relationship between the cutting edges of the first round blade 3 and the second round blade 4 at this time can be expressed in an enlarged manner.FIG.It is estimated that the situation is as shown in. That is, since the second round blade 4 is pushed into the first round blade 3 by a predetermined amount,FIG.As shown in (b), the cutting edge passing through the X point, the B point, and the Y point is in line contact, and the A point of the cutting edge of the second round blade 4 with respect to the vertical cross section passing through the X point of the first round blade 3 With the rotation of the second round blade 4FIG.As shown in (b) of FIG. 2, the penetration proceeds in the order of A, X, and B, and the biting force relatively acts on both cutting edges at the point X. In this state, the first cutter shaft 1 and the second cutter shaft 2 are made of a material having higher hardness by rotating each of the first cutter shaft 1 and the second cutter shaft 2 in opposite directions by one or more rotations.FirstThe cutting edge of the round blade becomes the cutting blade, and the cutting edge of the first round blade that becomes the cutting bladeSecondThe cutting edge of the round blade is machined, and the edge of the cutting edge side is fine and almost uniform.Blade edge planeIs formed.
[0029]
Here, on the cutting edge of the round blade with the lower hardnessBlade edge planeIn order to form a round blade, it is necessary that a clearance angle is provided on the side surface of the blade edge to form a sharp blade edge.In addition, in order to make the surface of the edge of the round blade with the higher hardness and the flat surface of the edge including the edge line of the edge with the lower hardness the surface contact, It must be a right angle.
[0030]
still,FIG.In the above description, the first round blade 3 and the blade holder 5 are fixed to be adjacent to each other. However, depending on the slit width dimension, the predetermined distance between the adjacent first round blades 3 and the adjacent blade holders 5 is determined. A spacer having a size can be interposed, and the spacer can be omitted by adopting a structure in which the first round blade 3 and the blade holder 5 can be individually fixed to each blade shaft. Also,FIG.The first round blade 3 is a round blade with the opposite edge of the escape groove 32 as the cutting edge, but the outer peripheral edge on the escape groove 32 side can also be used as the blade edge.
[0031]
【Example】
FIG.These are the figures for demonstrating one Example of this invention, a cemented carbide is used as the material of the 1st round blade 3 which consists of a material with higher hardness, and high-speed tool steel is used as the material of the 2nd round blade 4. Is a diagram showing both the round blades of the round blade cutting device when using the No. 1, the outer diameter D of the first round blade 3 is 80 mm, the outer diameter d of the second round blade 4 is 98 mm, the clearance angle β of the side surface of the blade edge is The lap amount L in the vertical direction of the blade edge was set to 0.5 mm.FIG.(B) is a photograph (enlarged photograph by an optical microscope) instead of a drawing showing a cross section of the cutting edge of the second round blade 4 before the cutting edge processing according to the present invention is carried out.
[0032]
Next, the apparent side pressure applied between the cutting edge of the second round blade 4 and the cutting edge of the first round blade 3 when actually cutting a magnetic tape or the like is about 500 to 1200 g. In this state, the apparent side pressure is set to about 500 g, and in this state, the first cutter shaft 1 and the second cutter shaft 2 are rotated several times to form a minute and substantially uniform cutting portion around the entire circumference of the second round blade 4. Formed.
[0033]
FIG.(B) is a photograph (enlarged photograph by an optical microscope) instead of a drawing showing a cross section of the cutting portion formed on the second round blade 4, in which the dimension of the cutting portion of the cutting edge in the blade width direction is It is about 5.5 μm, and the radial dimension of the blade is about 55 μm.FIG.The cutting edge shape is clearly different from the conventional plastically deformed cutting edge shown in (1), resulting in a smooth cutting surface and no defects such as chipping.
[0034]
FIG.(A) is a photograph (enlarged photograph by a scanning electron microscope (SEM apparatus)) replacing the drawing showing the cutting waste discharged by the cutting process,FIG.(B) is a photograph (enlarged photograph by SEM device) showing a cross section of the cutting waste. And the width | variety was about 45 micrometers-50 micrometers.
[0035]
8 to 10(A) is a photograph (enlarged photograph by SEM apparatus) in place of the drawing showing the cutting edge of the second round blade 4, and (b) is a diagram for explaining each photograph. Also, the shooting direction of the photo isFIG.As shown in (c), it is observed from an oblique direction with respect to the cutting edge.
[0036]
First,FIG.(B) is a photograph of an unused cutting edge, and it can be seen that the cutting edge is sharp. next,FIG.(A) is a photograph of the cutting part of the cutting edge according to the embodiment of the present invention observed, and it can be seen that the cutting part is clearly smooth and the cutting edge is also a sharp line. .
[0037]
In contrast,FIG.(B) is a combination of the upper and lower blades in the prior art, and is a photograph of the cutting edge of the second round blade 4 when the alloy tool steel for mold (SKD) is used as the material of the first round blade 3. It can be seen that there is considerable damage to the blade edge due to plastic deformation and chipping.
[0038]
FIG.IsFIG.Drawing which shows the section of the cut end of the product when the PET film having a thickness of 5 μm is slit by the round blade cutting device using the combination of the conventional materials shown in (SKH material and SKD material) and the round blade cutting device of the present invention It is a photograph (enlarged photograph by SEM device) that replacesFIG.(A) is based on a conventional round blade cutting device, and (B) is based on the round blade cutting device of the present invention. As apparent from the photograph, a defect (tearing) that appears to be caused by damage to the cutting edge appears at the cut edge of the conventional round blade cutting apparatus, but such a cut edge by the round blade cutting apparatus of the present invention has such a defect. The defect did not appear.
[0039]
【The invention's effect】
As explained aboveAccording to the present invention,It was difficult to obtain a clean cut state with a conventional round blade cutting device.Thickness is micron orderEven very thin films can be slit cleanly without problems. Further, since the cutting edge of the round blade having the lower hardness comes in contact with the cutting edge of the mating round blade from the initial stage of use, a good slit condition is maintained for a long period of time.
[Brief description of the drawings]
FIG. 1 is a schematic view showing the relationship between upper and lower round blades of a round blade cutting apparatus for explaining an embodiment of the present invention.
FIG. 2 is a schematic view showing the relationship between upper and lower round blades of another round blade cutting apparatus for explaining an embodiment of the present invention.
FIG. 3 is a schematic view showing the relationship between upper and lower round blades of another round blade cutting apparatus for explaining an embodiment of the present invention.
FIG. 4 is a schematic view for explaining the relationship between the press contact portions of the cutting edges of the first and second round blades.
FIG. 5 is a schematic view for explaining an embodiment of the present invention.
FIG. 6 is an enlarged photograph taken by an optical microscope showing a cross section of the blade edge.
FIG. 7 is an enlarged photograph taken by a scanning electron microscope showing cutting waste discharged by carrying out the cutting edge processing method according to the present invention.
FIG. 8 is an enlarged photograph taken by a scanning electron microscope in which the cutting edge of a round blade before the present invention is observed from an oblique direction, and an explanatory diagram thereof.
FIG. 9 is an enlarged photograph taken by a scanning electron microscope in which a cutting edge of a round blade embodying the present invention is observed from an oblique direction, and an explanatory diagram thereof.
FIG. 10 is an enlarged photograph by a scanning electron microscope in which a cutting edge of a round blade by a combination of upper and lower round blades in the prior art is observed from an oblique direction, and an explanatory diagram thereof.
FIG. 11 is an enlarged photograph taken by a scanning electron microscope in which a cross section of the cut web is observed from an oblique direction.
FIG. 12 is a schematic diagram for explaining an example of a conventional round blade cutting apparatus.
FIG. 13 is a schematic diagram for explaining another example of a conventional round blade cutting device.
FIG. 14 is an enlarged photograph taken by an optical microscope showing a cross-section of a cutting edge of a round blade by a combination of upper and lower round blades in the prior art.
[Explanation of symbols]
1 First tool axis
2 Second cutter axis
3 1st round blade
4 second round blade
5 Blade holder
6 Disc spring
31 Side of the edge of the first round blade
32 escape groove
41 Side of the edge of the second round blade
52 Mounting step
Claims (4)
前記第１丸刃と前記第２丸刃のうちの一方の丸刃はビッカース硬度がＨＶ１３５０以上の超硬合金からなり、他方の丸刃はビッカース硬度がＨＶ８３２以下の各種工具鋼からなり、
前記一方の丸刃の刃先側面は軸直角に形成され、
前記他方の丸刃には逃げ角が形成され、
前記一方の丸刃の刃先側面と前記他方の丸刃の刃先先端とを被切断帯を切断する為の所定の側圧力で接触させて、
被切断帯を切断する前の初期段階で、少なくとも前記他方の丸刃を備えた方の刃物軸を少なくとも１回転させて、前記一方の丸刃の刃先側面によって前記他方の丸刃の刃先を切削することにより、
前記他方の丸刃の刃先側面側周縁部に微小でほぼ均一な刃先平面部と鋭利な刃先線とが形成され、
該刃先線を含んだ前記刃先平面部と前記一方の丸刃の刃先側面とが面接触になるようにしたことを特徴とする丸刃切断装置。A first cutter shaft provided with a first round blade, and a second cutter shaft provided with a second round blade corresponding to the first round blade, the cutting edge of the first round blade and the second round blade A round blade cutting device that slits in a length direction a band to be cut that is passed between the first blade shaft and the second blade shaft by a cutting edge of the blade, wherein the first round blade is an annular round blade. And the second round blade is a round blade cutting device that is a thin round blade pressed toward the first round blade,
One of the first round blade and the second round blade is made of a cemented carbide having a Vickers hardness of HV1350 or more, and the other round blade is made of various tool steels having a Vickers hardness of HV832 or less.
The side surface of the edge of the one round blade is formed perpendicular to the axis,
A clearance angle is formed in the other round blade,
The side surface of the one round blade and the tip end of the other round blade are brought into contact with each other with a predetermined side pressure for cutting the band to be cut .
At the initial stage before cutting the cut band, at least one rotation of the tool shaft provided with at least the other round blade is performed, and the cutting edge of the other round blade is cut by the side surface of the one cutting edge. By doing
A fine and substantially uniform cutting edge plane portion and a sharp cutting edge line are formed on the edge side edge of the other round blade ,
A round blade cutting apparatus characterized in that the cutting edge plane portion including the cutting edge line and the cutting edge side surface of the one round blade are in surface contact .
前記第１丸刃と前記第２丸刃のうちの一方の丸刃はビッカース硬度がＨＶ１３５０以上の超硬合金からなり、
他方の丸刃はビッカース硬度がＨＶ８３２以下の各種工具鋼からなり、
前記一方の丸刃の刃先側面は軸直角に形成され、
前記他方の丸刃には逃げ角が形成され、
前記一方の丸刃の刃先側面と前記他方の丸刃の刃先先端とを被切断帯を切断する為の所定の側圧力で接触させて、
被切断帯を切断する前の初期段階で、少なくとも前記他方の丸刃を備えた方の刃物軸を少なくとも１回転させて、前記一方の丸刃の刃先側面によって前記他方の丸刃の刃先を切削することにより、
前記他方の丸刃の刃先側面側周縁部に微小でほぼ均一な刃先平面部と鋭利な刃先線とが形成され、
該刃先線を含んだ前記刃先平面部と前記一方の丸刃の刃先側面とが面接触になるようにしたことを特徴とする丸刃切断装置。A first cutter shaft provided with a plurality of first round blades, and a second cutter shaft provided with a plurality of second round blades corresponding to the first round blades, the cutting edge of the first round blade and the A round blade cutting device for slitting a plurality of cut bands in a length direction through a cutting band passed between the first blade shaft and the second blade shaft by a cutting edge of a second round blade, In the round blade cutting device in which the round blade is an annular round blade, and the second round blade is a thin round blade pressed toward the first round blade,
One of the first round blade and the second round blade is made of a cemented carbide having a Vickers hardness of HV1350 or more,
The other round blade consists of various tool steels with Vickers hardness of HV832 or less,
The side surface of the edge of the one round blade is formed perpendicular to the axis,
A clearance angle is formed in the other round blade,
The side surface of the one round blade and the tip end of the other round blade are brought into contact with each other with a predetermined side pressure for cutting the band to be cut .
At the initial stage before cutting the cut band, at least one rotation of the tool shaft provided with at least the other round blade is performed, and the cutting edge of the other round blade is cut by the side surface of the one cutting edge. By doing
A fine and substantially uniform cutting edge plane portion and a sharp cutting edge line are formed on the edge side edge of the other round blade ,
A round blade cutting apparatus characterized in that the cutting edge plane portion including the cutting edge line and the cutting edge side surface of the one round blade are in surface contact .
前記第１丸刃と前記第２丸刃のうちの一方の丸刃をビッカース硬度がＨＶ１３５０以上の超硬合金とし、
他方の丸刃をビッカース硬度がＨＶ８３２以下の各種工具鋼とし、
前記一方の丸刃の刃先側面を軸直角に形成し、
前記他方の丸刃には逃げ角を形成し、
前記一方の丸刃の刃先側面と前記他方の丸刃の刃先先端とを被切断帯を切断する為の所定の側圧力で接触させて、
被切断帯を切断する前の初期段階で、少なくとも前記他方の丸刃を備えた方の刃物軸を少なくとも１回転させて、前記一方の丸刃の刃先側面によって前記他方の丸刃の刃先側面側周縁部に微小でほぼ均一な刃先平面部と前記他方の丸刃の刃先先端に鋭利な刃先線とを形成し、該刃先線を含んだ前記刃先平面部と前記一方の丸刃の刃先側面とが
面接触になるように前記他方の丸刃の刃先を切削することを特徴とする丸刃切断装置用丸刃の刃先加工方法。A first cutter shaft provided with an annular first round blade, and a second cutter shaft provided with a second round blade consisting of a thin round blade pressed toward the first round blade, A circle used in a round blade cutting apparatus that slits a cutting band passed between the first blade shaft and the second blade shaft in the length direction by the blade edge of one round blade and the blade tip of the second round blade. In the blade edge processing method,
One of the first round blade and the second round blade is a cemented carbide having a Vickers hardness of HV1350 or more,
The other round blade is made of various tool steels with Vickers hardness of HV832 or less,
Forming the side surface of the edge of the one round blade perpendicular to the axis;
The other round blade forms a clearance angle,
The side surface of the one round blade and the tip end of the other round blade are brought into contact with a predetermined side pressure for cutting the band to be cut ,
At the initial stage before cutting the cut band, at least one rotation of the cutter shaft provided with the other round blade is performed , and the blade tip side surface side of the other round blade is cut by the blade tip side surface of the one round blade. A fine and substantially uniform cutting edge plane portion at the peripheral edge and a sharp cutting edge line at the tip of the other round blade, the cutting edge plane portion including the cutting edge line, and the cutting edge side surface of the one round blade, But
A cutting edge processing method for a round blade for a round blade cutting apparatus , wherein the cutting edge of the other round blade is cut so as to be in surface contact .
前記第１丸刃と前記第２丸刃のうちの一方の丸刃をビッカース硬度がＨＶ１３５０以上の超硬合金とし、
他方の丸刃をビッカース硬度がＨＶ８３２以下の各種工具鋼とし、
前記一方の丸刃の刃先側面を軸直角に形成し、
前記他方の丸刃には逃げ角を形成し、
前記一方の丸刃の刃先側面と前記他方の丸刃の刃先先端とを被切断帯を切断する為の所定の側圧力で接触させて、
被切断帯を切断する前の初期段階で、少なくとも前記他方の丸刃を備えた方の刃物軸を少なくとも１回転させて、前記一方の丸刃の刃先側面によって前記他方の丸刃の刃先側面側周縁部に微小でほぼ均一な刃先平面部と前記他方の丸刃の刃先先端に鋭利な刃先線とを形成し、該刃先線を含んだ前記刃先平面部と前記一方の丸刃の刃先側面とが面接触になるように前記他方の丸刃の刃先を切削することを特徴とする丸刃切断装置用丸刃の刃先加工方法。A first cutter shaft provided with a plurality of annular first round blades, and a second cutter shaft provided with a plurality of second round blades made of thin round blades pressed toward the first round blade, A round blade that slits a band to be cut, which is passed between the first blade shaft and the second blade shaft, into a plurality of strips in the length direction by the blade tip of the first round blade and the blade tip of the second round blade. In the cutting edge processing method of the round blade used in the cutting device,
One of the first round blade and the second round blade is a cemented carbide having a Vickers hardness of HV1350 or more,
The other round blade is made of various tool steels with Vickers hardness of HV832 or less,
Forming the side surface of the edge of the one round blade perpendicular to the axis;
The other round blade forms a clearance angle,
The side surface of the one round blade and the tip end of the other round blade are brought into contact with a predetermined side pressure for cutting the band to be cut ,
At the initial stage before cutting the cut band, at least one rotation of the cutter shaft provided with the other round blade is performed , and the blade tip side surface side of the other round blade is cut by the blade tip side surface of the one round blade. A fine and substantially uniform cutting edge plane portion at the peripheral edge and a sharp cutting edge line at the tip of the other round blade, the cutting edge plane portion including the cutting edge line, and the cutting edge side surface of the one round blade, A cutting edge processing method for a round blade for a round blade cutting apparatus, characterized in that the cutting edge of the other round blade is cut so that is in surface contact .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24086299A JP4368009B2 (en) | 1999-08-27 | 1999-08-27 | Round blade cutting device and cutting edge cutting method of round blade for round blade cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24086299A JP4368009B2 (en) | 1999-08-27 | 1999-08-27 | Round blade cutting device and cutting edge cutting method of round blade for round blade cutting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001062773A JP2001062773A (en) | 2001-03-13 |
| JP4368009B2 true JP4368009B2 (en) | 2009-11-18 |
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| JP24086299A Expired - Fee Related JP4368009B2 (en) | 1999-08-27 | 1999-08-27 | Round blade cutting device and cutting edge cutting method of round blade for round blade cutting device |
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| JP5011632B2 (en) * | 2004-06-29 | 2012-08-29 | Ｔｄｋ株式会社 | Slitting apparatus and electrode manufacturing method |
| SK50352010A3 (en) * | 2008-02-19 | 2010-12-07 | Sumitomo Chemical Company, Limited | Slitter device using rotating round blades, method of manufacturing sheet-like article and sheet-like article producible by the method |
| JP5445734B2 (en) * | 2008-10-03 | 2014-03-19 | 横浜ゴム株式会社 | Strip-shaped member cutting device |
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