JP2004195609A

JP2004195609A - Saw blade

Info

Publication number: JP2004195609A
Application number: JP2002368848A
Authority: JP
Inventors: Tomoyuki Hashimoto; 智幸橋本
Original assignee: Amada Co Ltd
Current assignee: Amada Co Ltd
Priority date: 2002-12-19
Filing date: 2002-12-19
Publication date: 2004-07-15
Anticipated expiration: 2022-12-19
Also published as: JP4301806B2

Abstract

<P>PROBLEM TO BE SOLVED: To lengthen the saw blade service life by improving straightness of a saw blade 13, and restraining cutting-bending of the saw blade 13. <P>SOLUTION: A first cutting tooth group 15 composed of one straight tooth S and an even number of set teeth R and L succeeding to the straight tooth S when viewed from the saw blade advancing direction and a second cutting tooth group 17 composed of one straight tooth S and an odd number of set teeth R and L succeeding to the straight tooth S when viewed from the saw blade advancing direction, are alternately arranged so as to be repeated many times, and are respectively constituted so as to become opposite between the shaking-out direction of the set tooth R (or L) succeeding just before to the respective straight teeth S when viewed from the saw blade advancing direction and the shaking-out direction of the set tooth L (or R) succeeding just after to the respective straight teeth S when viewed from the saw blade advancing direction. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、ワークピースの切断に用いられる帯鋸刃、丸鋸刃、ハクソー、ホールソー等の鋸刃に関する。
【０００２】
【従来の技術】
従来より、例えば金属製のワークピースを切断する際には帯鋸盤が広く使用されており、前記帯鋸盤の切削工具としての鋸刃には、様々な研究開発がなされており、その結果、次のような鋸刃が一般的に使用されるに至っている。
【０００３】
即ち、図９に示すように、一般的な第１の鋸刃１は、多数の切断歯群３（図９（ａ）（ｂ）中には１つの切断歯群３のみ図示）を連続して備えている。各切断歯群３は、それぞれ、１本の直歯Ｓ、鋸刃進行方向（図９（ａ）（ｂ）において右方向）からみて直歯Ｓに後続しかつ右方向（図９（ａ）において下方向、図９（ｂ）において紙面に向かって表方向、図９（ｃ）において左方向）へ振り出した複数本の右アサリ歯Ｒ、及び前記鋸刃進行方向からみて直歯Ｓに後続しかつ左方向（図９（ａ）において上方向、図９（ｂ）において紙面に向かって裏方向、図９（ｃ）において右方向）へ振り出した複数本の左アサリ歯Ｌからなっている。ここで、複数本の右アサリ歯Ｒと複数本の左アサリ歯Ｌは交互に配置してある。
【０００４】
そして、ステンレス鋼，合金工具鋼等の難削材からなるワークピースの切断を容易にするため、アサリ歯Ｒ、Ｌの歯高を変えたり、更にはアサリ歯Ｒ，Ｌの振り出し量を変えたりしている。
【０００５】
即ち、図１０に示すように、一般的な第２の鋸刃５は、一般的な第１の鋸刃１と同様に、多数の切断歯群７（図１０（ａ）（ｂ）中には１つの切断歯群７のみ図示）を連続して備えてあって、各切断歯群７は、それぞれ、１本の直歯Ｓ、鋸刃進行方向（図１０（ａ）（ｂ）において右方向）からみて直歯Ｓに後続した複数本の右アサリ歯Ｒ、及び鋸刃進行方向からみて直歯Ｓに後続した複数本の左アサリ歯Ｌからなっている。ここで、各切断歯群７にあっては、それぞれ、歯高の低い右アサリ歯、歯高の高い左アサリ歯Ｌ、歯高の高い右アサリ歯Ｒ、歯高の低い左アサリ歯Ｌが順に前記鋸刃進行方向の反対方向へ配列してある。
【０００６】
また、図１１に示すように、一般的な第３の鋸刃９は、一般的な第１の鋸刃１と同様に、多数の切断歯群１１（図１１（ａ）（ｂ）中には１つの切断歯群１１のみ図示）を連続して備えてあって、各切断歯群１１は、それぞれ、１本の直歯Ｓ、前記鋸刃進行方向（図１１（ａ）（ｂ）において右方向）からみて直歯Ｓに後続した複数本の右アサリ歯Ｒ、及び複数本の右アサリ歯Ｌとからなっている。ここで、各切断歯群１１にあっては、それぞれ、歯高の低くかつ振り出し量が大きい右アサリ歯Ｒｗ、歯高の高くかつ振り出し量が小さい左アサリ歯Ｌｎ、歯高の高くかつ振り出し量が小さい右アサリ歯Ｒｎ、歯高の低くかつ振り出し量が大きい左アサリ歯Ｌｗが順に前記鋸刃進行方向の反対方向へ配列してある。
【０００７】
なお、図１０（ｂ）及び図１１（ｂ）中において、Ｈｉは歯高が高いことを示しており、Ｌｏは歯高が低いことを示している。
【０００８】
更に、図９から図１１に示す鋸刃１（５，９）にあっては、切削騒音の低減を図るために、切断歯群３（７，１１）における歯間ピッチを不等ピッチに構成したものもある。
【０００９】
なお、本発明に関連する特許文献として下記のものがある。
【００１０】
【特許文献１】
特許第２８５３７６７号公報
【００１１】
【特許文献２】
特公平７−１４５７２号公報
【００１２】
【特許文献３】
特開２０００−１３５６７５号公報
【００１３】
【発明が解決しようとする課題】
ところで、鋸刃１（５，９）全体からみると、図７に示すように、右アサリ歯Ｒ、直歯Ｓ、左アサリ歯Ｌの順に前記鋸刃進行方向の反対方向へ配列したＲＳＬ配列パターンと、図８に示すように、左アサリ歯Ｌ、直歯Ｓ、右アサリ歯Ｒの順に前記反対方向へ配列したＬＳＲ配列パターンのうちのいずれかの同じ配列パターンが繰り返し存在することになる。
【００１４】
一方、ワークピースへの突入に際して、直歯Ｓは直接振られることはないが、右アサリ歯Ｒは左方向へ大きく振られ、左アサリ歯Ｌは右方向へ大きく振られるため、前記ＲＳＬ配列パターンを構成する直歯Ｓは、右アサリ歯Ｒ（直前のアサリ歯）によって左方向へ傾いてワークピースに突入すると共に、前記ＬＳＲ配列パターンを構成する直歯Ｓは、左アサリ歯Ｌ（直前のアサリ歯）によって右方向へ傾いてワークピースに突入する。
【００１５】
そのため、ワークピースの切断に際して、多数本の直歯Ｓは一方向（右方向又左方向）に傾いてワークピースに順次突入することになり、鋸刃１（５，９）の直進性を十分に保つことができず、鋸刃１（５，９）の切曲がりが大きくなって、鋸刃寿命を延ばすことが困難になる。
【００１６】
また、鋸刃１（５，９）の歯間ピッチを不等ピッチにするだけでは、切削騒音を低減をするには十分でなく、環境問題が重要な社会問題の一つになっている昨今状況を鑑みると、作業環境の更なる向上を図る必要がある。
【００１７】
【課題を解決するための手段】
請求項１に記載の発明にあっては、多数本の直歯及び多数本のアサリ歯を備えてなる鋸刃において、
１本の前記直歯及び鋸刃進行方向からみて前記直歯に対して後続する偶数本の前記アサリ歯からなる第１切断歯群と、１本の前記直歯及び前記鋸刃進行方向からみて前記直歯に対して後続する奇数本の前記アサリ歯からなる第２切断歯群とを交互に多数回繰り返されるように配置してあって、
前記鋸刃進行方向からみて各直歯に対して直前に先行する前記アサリ歯の振り出し方向と、前記鋸刃進行方向からみて各直歯に対して直後に後続する前記アサリ歯の振り出し方向が反対になるようにそれぞれ構成してなることを特徴とする。
【００１８】
請求項１に記載の発明特定事項によると、各直歯に対して直前に先行する前記アサリ歯の振り出し方向と各直歯に対して直後に後続する前記アサリ歯の振り出し方向が反対になるようにしてあるため、前記第１切断歯群における前記アサリ歯と前記第２切断歯群における前記アサリ歯の本数が異なることもあって、鋸刃全体からみると、前記右アサリ歯，前記直歯，前記左アサリ歯の順に鋸刃進行方向の反対方向へ配列したＲＳＬ配列パターンと、前記左アサリ歯、前記直歯、前記右アサリ歯の順に前記反対方向へ配列したＬＳＲ配列パターンが同じ数だけ存在することになる。そのため、鋸刃全体からみると、ワークピースへの突入に際して右方向へ傾く前記直歯と、ワークピースへの突入に際して左方向へ傾く前記直歯が同じ数だけ存在することになり、前記直歯が右方向へ曲がろうとする力と、前記直歯が左方向へ曲がろうする力が互いに打ち消し合うように作用する。
【００１９】
また、前記第１切断歯群における前記アサリ歯と前記第２切断歯群における前記アサリ歯の本数が異なるため、鋸刃全体からみて隣接する前記直歯間の間隔（直歯間隔）が一定でなく、２つの切断歯群における前記アサリ歯の本数差に応じて、前記直歯間隔を長い直歯間隔と短い直歯間隔に大別することができる。そのため、ワークピースの切断中において前記直歯のワークピースへの突入周期が異なるだけでなく、前記長い直歯間隔に基づく鋸刃の刃幅方向の振動と、前記短い直歯間隔に基づく鋸刃の刃幅方向の振動を交互に発生させて、両者の振動が干渉して打ち消し合うように作用する。
【００２０】
請求項２に記載の発明にあっては、請求項１に記載の発明特定事項の他に、隣接する前記第１切断歯群と前記第２切断歯群をそれぞれ切断歯群セットとし、
前記鋸刃進行方向からみて、先行する前記切断歯群セットにおける複数本の前記アサリ歯の振り出しパターンと、後続する前記切断歯群セットにおける複数本の前記アサリ歯の振り出しパターンが反対になるようにそれぞれ構成してなることを特徴とする。
【００２１】
なお、切断歯群セットにおける複数本の前記アサリ歯の振り出しパターンとは、切断歯群セットにおける前記左アサリ歯と前記右アサリ歯の配列パターンと同意義である。
【００２２】
請求項２に記載の発明特定事項によると、請求項１に記載の発明特定事項による作用の他に、先行する前記切断歯群セットにおける複数本の前記アサリ歯の振り出しパターンと、後続する前記切断歯群セットにおける複数本の前記アサリ歯の振り出しパターンが反対になるうようにしたため、先行する前記切断歯群セットの切削による鋸刃の刃厚方向（左右方向）の振れ及び振動と、後続する前記切断歯群セットによる切削による鋸刃の前記刃厚方向の振れ及び振動がそれぞれ打ち消し合うように作用する。
【００２３】
請求項３に記載の発明にあっては、請求項１又は請求項２に記載の発明特定事項の他に、全てのアサリ歯の振り出し量がそれぞれ略同じであることを特徴とする。
【００２４】
請求項３に記載の発明特定事項によると、請求項１又は請求項２に記載の発明特定事項による作用と同様の作用を奏する。
【００２５】
請求項４に記載の発明にあっては、請求項１又は請求項２に記載の発明特定事項の他に、全ての第１切断歯群における前記アサリ歯の振り出し量がそれぞれ略同じであって、全ての第２切断歯群における前記アサリ歯の振り出し量はそれぞれ略同じであって、前記第１切断歯群における前記アサリ歯の振り出し量と前記第２切断歯群における前記アサリ歯の振り出し量が異なることを特徴とする。
【００２６】
請求項４に記載の発明特定事項によると、請求項１又は請求項２に記載の発明特定事項による作用の他に、前記第１切断歯群における前記アサリ歯の振り出し量と前記第２切断歯群における前記アサリ歯の振り出し量が異なるため、ステンレス鋼，合金工具鋼等の難削材からなるワークピースの切削が容易になる。
【００２７】
請求項５に記載の発明にあっては、請求項１又は請求項２に記載の発明特定事項の他に、全てのアサリ歯の歯高がそれぞれ略同じであることを特徴とする。
【００２８】
請求項５に記載の発明特定事項によると、請求項１又は請求項２に記載の発明特定事項による作用と同様の作用を奏する。
【００２９】
請求項６に記載の発明にあっては、請求項１又は請求項２に記載の発明特定事項の他に、全ての第１切断歯群における前記アサリ歯の歯高がそれぞれ略同じであって、全ての第２切断歯群における前記アサリ歯の歯高はそれぞれ略同じであって、前記第１切断歯群における前記アサリ歯の歯高と前記第２切断歯群における前記アサリ歯の歯高が異なることを特徴とする。
【００３０】
請求項６に記載の発明特定事項によると、請求項１又は請求項２に記載の発明特定事項による作用の他に、前記第１切断歯群における前記アサリ歯の歯高と前記第２切断歯群における前記アサリ歯の歯高が異なるため、ステンレス鋼，合金工具鋼等の難削材からなるワークピースの切削が容易になる。
【００３１】
請求項７に記載の発明にあっては、請求項１から請求項６のうちのいずれかの請求項に記載の発明特定事項の他に、各第１切断歯群における歯間ピッチ及び各第２切断歯群における歯間ピッチを不等ピッチによりそれぞれ構成してなることを特徴とする。
【００３２】
請求項７に記載の発明特定事項によると、請求項１から請求項６のうちのいずれかの請求項に記載の発明特定事項による作用と同様の作用を奏する。
【００３３】
【発明の実施の形態】
以下、本発明の実施の形態について図面を参照して説明する。
【００３４】
図１（ａ）は、第１の発明の実施の形態に係わる鋸刃の一部分を歯先側からみた図であって、図１（ｂ）は、第１の発明の実施の形態に係わる鋸刃の一部分の歯先側面図であって、図１（ｃ）は、第１の発明の実施の形態に係わる鋸刃の断面図である。
【００３５】
図１に示すように、第１の発明の実施の形態に係わる鋸刃１３は、帯鋸盤の切削工具として用いられるものであって、多数本の直歯Ｓ、右方向（図１（ａ）において下方向、図１（ｂ）において紙面に向かって表方向、図１（ｃ）において左方向）へ振り出した多数本の右アサリ歯、及び左方向（図１（ａ）において上方向及び図１（ｂ）において紙面に向かって裏方向、図１（ｃ）において右方向）へ振り出した多数本の左アサリ歯を備えている。
【００３６】
第１の発明の実施の形態に係わる鋸刃１３にあっては、第１切断歯群１５と第２切断歯群１７を交互に多数回繰り返されるように配置されている。ここで、第１切断歯群１５は、１本の直歯Ｓ、及び鋸刃進行方向（図１（ａ）及び図１（ｂ）において右方向）からみて直歯Ｓに対して後続する２本のアサリ歯Ｒ，Ｌ（Ｌ，Ｒ）からなっており、第２切断歯群１７は、１本の直歯Ｓ、及び前記鋸刃進行方向からみて直歯Ｓに対して後続する３本のアサリ歯Ｌ，Ｒ，Ｌ（Ｒ，Ｌ，Ｒ）からなっている。なお、第１切断歯群１５におけるアサリ歯Ｒ，Ｌの本数は偶数であれば２本でなくてもよく、第２切断歯群１７におけるアサリ歯Ｒ，Ｌの本数は奇数であれば３本でなくてもよい。
【００３７】
また、前記鋸刃進行方向からみて各直歯Ｓに対して直前に先行するアサリ歯Ｒ（又はＬ）の振り出し方向と、前記鋸刃進行方向からみて各直歯Ｓに対して直後に後続するアサリ歯Ｌ（又はＲ）の振り出し方向が反対になるようにそれぞれ構成してある。
【００３８】
更に、隣接する第１切断歯群１５と第２切断歯群１７をそれぞれ切断歯群セット１９としあって、前記鋸刃進行方向からみて、先行する切断歯群セット１９における複数本のアサリ歯Ｒ，Ｌの振り出しパターンと、後続する切断歯群セット１９における複数本のアサリ歯Ｒ，Ｌの振り出しパターンが反対になるようにそれぞれ構成してある。なお、切断歯群セット１９における複数本のアサリ歯Ｒ，Ｌの振り出しパターンとは、切断歯群セット１９における右アサリ歯Ｒと左アサリ歯Ｌの配列パターンと同意義である。
【００３９】
また、全てのアサリ歯Ｒ，Ｌの振り出し量がそれぞれ略同じであって、全てのアサリ歯Ｒ，Ｌの歯高がそれぞれ略同じである。更に、各第１切断歯群１５における歯間ピッチはＰ１，Ｐ２，Ｐ３のように不等ピッチによりそれぞれ構成してあって、各第２切断歯群１７における歯間ピッチはＰ４，Ｐ５，Ｐ６，Ｐ７のように不等ピッチによりそれぞれ構成してある。
【００４０】
次に、第１の発明の実施形態の作用について説明する。
【００４１】
直前のアサリ歯Ｒ（又はＬ）の振り出し方向と直後のアサリ歯Ｌ（又はＲ）の振り出し方向が反対になるようにしてあるため、第１切断歯群１５におけるアサリ歯Ｒ，Ｌと第２切断歯群１７におけるアサリ歯Ｒ，Ｌの本数が異なることもあって、鋸刃１３全体からみると、右アサリ歯Ｒ，直歯Ｓ，左アサリ歯Ｌの順に鋸刃進行方向の反対方向へ配列したＲＳＬ配列パターン（図７参照）と、左アサリ歯Ｌ，直歯Ｓ，右アサリ歯Ｒの順に前記反対方向へ配列したＬＳＲ配列パターン（図８参照）が同じ数だけ存在することになる。そのため、鋸刃１３全体からみると、ワークピース（図示省略）への突入に際して右方向へ傾く直歯と、ワークピースへの突入に際して左方向へ傾く直歯Ｓが同じ数だけ存在することになり、直歯Ｓが右方向へ曲がろうとする力と、直歯Ｓが左方向へ曲がろうする力が互いに打ち消し合うように作用する。
【００４２】
また、第１切断歯群１５におけるアサリ歯Ｒ，Ｌと第２切断歯群１７におけるアサリ歯Ｒ，Ｌの本数が異なるため、鋸刃１３全体からみて隣接する直歯Ｓ間の間隔（直歯間隔）が一定でなく、２つの切断歯群１５，１７におけるアサリ歯Ｒ，Ｌの本数差に応じて、前記直歯間隔を長い直歯間隔と短い直歯間隔に大別することができる。そのため、ワークピースの切断中において直歯Ｓのワークピースへの突入周期が異なるだけでなく、前記長い直歯間隔に基づく鋸刃１３の刃幅方向の振動と、前記短い直歯間隔に基づく鋸刃１３の刃幅方向の振動を交互に発生させて、両者の振動が干渉して打ち消し合うように作用する。
【００４３】
更に、先行する切断歯群セット１９における複数本のアサリ歯Ｒ，Ｌの振り出しパターンと、後続する切断歯群セット１９における複数本のアサリ歯Ｒ，Ｌの振り出しパターンが反対になるうようにしたため、先行する切断歯群セット１９の切削による鋸刃１３の刃厚方向（左右方向）の振れ及び振動と、後続する切断歯群セット１９による切削による鋸刃１３の前記刃厚方向の振れ及び振動がそれぞれ打ち消し合うように作用する。
【００４４】
以上の如き、第１の発明の実施の形態によれば、直歯Ｓが右方向へ曲がろうとする力と、直歯Ｓが左方向へ曲がろうする力が互いに打ち消し合うように作用するため、鋸刃１３の直進性が向上して、鋸刃１３の切れ曲がりを抑制して、鋸刃寿命を延ばすことができる。
【００４５】
また、ワークピースの切断中において直歯Ｓのワークピースへの突入周期が異なるだけでなく、前記長い直歯間隔に基づく鋸刃１３の刃幅方向の振動と、前記短い直歯間隔に基づく鋸刃１３の刃幅方向の振動を交互に発生させて、両者が干渉して打ち消し合うように作用するため、鋸刃１３の切削騒音を低減して、作業環境が向上すると共に、鋸刃１３の歯欠け（チッピングを含む）を極力少なくして、鋸刃寿命を更に延ばすことができる。
【００４６】
更に、先行する切断歯群セット１９の切削による鋸刃１３の前記刃厚方向の振れ及び振動と、後続する切断歯群セット１９による切削による鋸刃１３の前記刃厚方向の振れ及び振動がそれぞれ打ち消し合うように作用するため、鋸刃１３の直進性が更に向上して、鋸刃寿命をより延ばすことができると共に、鋸刃１３の騒音を更に低減して、作業環境を更に向上させることができる。
【００４７】
図２（ａ）は、第２の発明の実施の形態に係わる鋸刃の一部分を歯先側からみた図であって、図２（ｂ）は、第２の発明の実施の形態に係わる鋸刃の一部分の歯先側面図であって、図２（ｃ）は、第２の発明の実施の形態に係わる鋸刃の断面図である。
【００４８】
第２の発明に実施の形態係わる鋸刃２１は、第１の発明の実施の形態に係わる鋸刃１３と同様に、多数本の直歯Ｓ、多数本の右アサリ歯Ｒ、及び多数本の左アサリ歯Ｌを備えてあって、第１切断歯群２３と第２切断歯群２５を交互に多数回繰り返されるように配置されている。
【００４９】
また、前記鋸刃進行方向（図２（ａ）及び図２（ｂ）において右方向）からみて各直歯Ｓに対して直前に先行するアサリ歯Ｒ（又はＬ）の振り出し方向と、前記鋸刃進行方向からみて各直歯Ｓに対して直後に後続するアサリ歯Ｌ（又はＲ）の振り出し方向が反対になるようにそれぞれ構成してある。更に、隣接する第１切断歯群２３と第２切断歯群２５をそれぞれ切断歯群セット２７としあって、前記鋸刃進行方向からみて、先行する切断歯群セット２７における複数本のアサリ歯Ｒ，Ｌの振り出しパターンと、後続する切断歯群セット２７における複数本のアサリ歯Ｒ，Ｌの振り出しパターンが反対になるようにそれぞれ構成してある。
【００５０】
また、全てのアサリ歯Ｒ，Ｌ振り出し量がそれぞれ略同じであり、全ての第１切断歯群２３におけるアサリ歯Ｒ，Ｌの歯高がそれぞれ略同じであって、全ての第２切断歯群２５におけるアサリ歯Ｒ，Ｌの歯高はそれぞれ略同じである。そして、第１切断歯群２３におけるアサリ歯Ｒ，Ｌの歯高は高く、第２切断歯群２５におけるアサリ歯Ｒ，Ｌの歯高は低くなっている。なお、図２（ｂ）中において、Ｈｉは歯高が高いことを示しており、Ｌｏは歯高が低いことを示している。
【００５１】
更に、各第１切断歯群２３における歯間ピッチはＰ１，Ｐ２，Ｐ３のように不等ピッチによりそれぞれ構成してあって、各第２切断歯群２５における歯間ピッチはＰ４，Ｐ５，Ｐ６，Ｐ７のように不等ピッチによりそれぞれ構成してある。
【００５２】
第２の発明の実施の形態にあっても、第１の発明の実施の形態の作用及び効果と同一の作用及び効果を奏する。
【００５３】
なお、第２の発明の実施の形態にあっては、第１切断歯群２３におけるアサリ歯Ｒ，Ｌの歯高と第２切断歯群２５におけるアサリ歯Ｒ，Ｌの歯高が異なっているため、ステンレス鋼，合金工具鋼等の難削材からなるワークピースの切削がより容易になる。
【００５４】
図３（ａ）は、第３の発明の実施の形態に係わる鋸刃の一部分を歯先側からみた図であって、図３（ｂ）は、第３の発明の実施の形態に係わる鋸刃の一部分の歯先側面図であって、図３（ｃ）は、第３の発明の実施の形態に係わる鋸刃の断面図である。
【００５５】
第３の発明に実施の形態係わる鋸刃２９は、第１の発明の実施の形態に係わる鋸刃１３と同様に、多数本の直歯Ｓ、多数本の右アサリ歯Ｒ、及び多数本の左アサリ歯Ｌを備えてあって、第１切断歯群３１と第２切断歯群３３を交互に多数回繰り返されるように配置されている。
【００５６】
また、前記鋸刃進行方向（図３（ａ）及び図３（ｂ）において右方向）からみて各直歯Ｓに対して直前に先行するアサリ歯Ｒ（又はＬ）の振り出し方向と、前記鋸刃進行方向からみて各直歯Ｓに対して直後に後続するアサリ歯Ｌ（又はＲ）の振り出し方向が反対になるようにそれぞれ構成してある。更に、隣接する第１切断歯群３１と第２切断歯群３３をそれぞれ切断歯群セット３５としあって、前記鋸刃進行方向からみて、先行する切断歯群セット３５における複数本のアサリ歯Ｒ，Ｌの振り出しパターンと、後続する切断歯群セット３５おける複数本のアサリ歯Ｒ，Ｌの振り出しパターンが反対になるようにそれぞれ構成してある。
【００５７】
また、全ての第１切断歯群３１におけるアサリ歯Ｒ，Ｌの振り出し量がそれぞれ略同じであって、全ての第２切断歯群３３におけるアサリ歯Ｒ，Ｌの振り出し量はそれぞれ略同じである。そして、第１切断歯群３１におけるアサリ歯Ｒｎ（Ｒ），Ｌｎ（Ｌ）の振り出し量は小さく、第２切断歯群３３におけるアサリ歯Ｒｗ（Ｒ），Ｌｗ（Ｌ）の振り出し量は大きくなっている。
【００５８】
また、全ての第１切断歯群３１におけるアサリ歯Ｒ，Ｌの歯高がそれぞれ略同じであって、全ての第２切断歯群３３におけるアサリ歯Ｒ，Ｌの歯高はそれぞれ略同じである。そして、第１切断歯群３１におけるアサリ歯Ｒ，Ｌの歯高と第２切断歯群３３におけるアサリ歯Ｒ，Ｌの歯高が異なっている。なお、図３（ｂ）中において、Ｈｉは歯高が高いことを示しており、Ｌｏは歯高が低いことを示している。
【００５９】
更に、各第１切断歯群における歯間ピッチはＰ１，Ｐ２，Ｐ３のように不等ピッチによりそれぞれ構成してあって、各第２切断歯群における歯間ピッチはＰ４，Ｐ５，Ｐ６，Ｐ７のように不等ピッチによりそれぞれ構成してある。
【００６０】
第３の発明の実施の形態にあっても、第１の発明の実施の形態の作用及び効果と同一の作用及び効果を奏する。
【００６１】
なお、第３の発明の実施の形態にあっては、第１切断歯群３１におけるアサリ歯Ｒ，Ｌの振り出し量と第２切断歯群３３におけるアサリ歯Ｒ，Ｌの振り出し量が異なっており、かつ第１切断歯群３３におけるアサリ歯Ｒ，Ｌの歯高と第２切断歯群３３におけるアサリ歯Ｒ，Ｌの歯高が異なっているため、ステンレス鋼，合金工具鋼等の難削材からなるワークピースの切削がより容易になる。
【００６２】
なお、本発明は、前述の発明の実施の形態の説明に限るものではなく、適宜の変更を行うことにより、その他様々な態様で実施可能である。
【００６３】
【実施例】
次に、実施例について簡単に説明する。
【００６４】
図４（ａ）は、発明品▲１▼と従来品▲１▼における切断面積と切削抵抗の関係を示す図であって、図４（ｂ）は、発明品▲１▼と従来品▲１▼における切断面積と切削騒音との関係を示す図であって、図４（ｃ）は、発明品▲１▼と従来品▲１▼における切断面積と切曲り量との関係を示す図であって、図４（ｄ）は、発明品▲１▼と従来品▲１▼における切断面の面粗さを示す図であって、図５（ａ）は、発明品▲２▼と従来品▲２▼における切断面積と切削抵抗の関係を示す図であって、図５（ｂ）は、発明品▲２▼と従来品▲２▼における切断面積と切削騒音との関係を示す図であって、図５（ｃ）は、発明品▲２▼と従来品▲２▼における切断面積と切曲り量との関係を示す図であって、図５（ｄ）は、発明品▲２▼と従来品▲２▼における切断面の面粗さを示す図であって、図６（ａ）は、発明品▲３▼と従来品▲３▼における切断面積と切削抵抗の関係を示す図であって、図６（ｂ）は、発明品▲３▼と従来品▲３▼における切断面積と切削騒音との関係を示す図であって、図６（ｃ）は、発明品▲３▼と従来品▲３▼における切断面積と切曲り量との関係を示す図であって、図６（ｄ）は、発明品▲３▼と従来品▲３▼における切断面の面粗さを示す図である。
【００６５】
図４（ａ）（ｂ）（ｃ）に示すように、発明品▲１▼（第１の発明の実施の形態に係わる鋸刃１３）によってＳ４５Ｃからなるワークピースを切断する場合の方が、従来品▲１▼（従来の鋸刃１）によってＳ４５Ｃからなるワークピースを切断する場合に比較して、切断抵抗と切削騒音を低減できること、及び切曲り量を小さくして鋸刃寿命を向上させることが確認された。更に、図４（ｄ）に示すように、発明品▲１▼によってＳ４５Ｃからなるワークピースを切断する場合においても、従来品▲１▼（従来の鋸刃１）によってＳ４５Ｃからなるワークピースを切断する場合と同様に、ワークピースの切断面をきれいに仕上げることが確認された。
【００６６】
また、図５（ａ）（ｂ）（ｃ）に示すように、発明品▲２▼（第２の発明の実施の形態に係わる鋸刃２１）によってＳＵＳ３０４からなるワークピースを切断する場合の方が、従来品▲２▼（従来の鋸刃５）によってＳＵＳ３０４からなるワークピースを切断する場合に比較して、切断抵抗と切削騒音を低減できること、及び切曲り量を小さくして鋸刃寿命を向上させることが確認された。更に、図５（ｄ）に示すように、発明品▲２▼によってＳＵＳ３０４からなるワークピースを切断する場合においても、従来品▲２▼（従来の鋸刃５）によってＳＵＳ３０４からなるワークピースを切断する場合と同様に、ワークピースの切断面をきれいに仕上げることが確認された。
【００６７】
また、図６（ａ）（ｂ）（ｃ）に示すように、発明品▲３▼（第３の発明の実施の形態に係わる鋸刃２９）によってＳＫＤ６１からなるワークピースを切断する場合の方が、従来品▲３▼（従来の鋸刃９）によってＳＫＤ６１からなるワークピースを切断する場合に比較して、切断抵抗と切削騒音を低減できること、及び切曲り量を小さくして鋸刃寿命を向上させることが確認された。更に、図６（ｄ）に示すように、発明品▲３▼によってＳＫＤ６１からなるワークピースを切断する場合の方が、従来品▲３▼（従来の鋸刃９）によってＳＫＤ６１からなるワークピースを切断する場合に比較して、ワークピースの切断面をきれいに仕上げることが確認された。
【００６８】
【発明の効果】
請求項１から請求項７のうちのいずれかの請求項に記載の発明によれば、前記直歯が右方向へ曲がろうとする力と、前記直歯が左方向へ曲がろうする力が互いに打ち消し合うように作用するため、鋸刃の直進性が向上して、鋸刃の切れ曲がりを抑制して、鋸刃寿命を延ばすことができる。
【００６９】
また、ワークピースの切断中において前記直歯のワークピースへの突入周期が異なるだけでなく、前記長い直歯間隔に基づく鋸刃の刃幅方向の振動と、前記短い直歯間隔に基づく鋸刃の刃幅方向の振動を交互に発生させて、両者が干渉して打ち消し合うように作用するため、鋸刃の切削騒音を低減して、作業環境が向上すると共に、鋸刃の歯欠け（チッピングを含む）を極力少なくして、鋸刃寿命を更に延ばすことができる。
【００７０】
請求項２から請求項７のうちのいずれかの請求項に記載の発明によれば、先行する前記切断歯群セットの切削による鋸刃の刃厚方向（左右方向）の振れ及び振動と、後続する前記切断歯群セットによる切削による鋸刃の前記刃厚方向の振れ及び振動がそれぞれ打ち消し合うように作用するため、前記鋸刃の直進性が更に向上して、鋸刃寿命をより延ばすことができると共に、鋸刃の騒音を更に低減して、作業環境を更に向上させることができる。
【図面の簡単な説明】
【図１】図１（ａ）は、第１の発明の実施の形態に係わる鋸刃の一部分を歯先側からみた図であって、図１（ｂ）は、第１の発明の実施の形態に係わる鋸刃の一部分の歯先側面図であって、図１（ｃ）は、第１の発明の実施の形態に係わる鋸刃の断面図である。
【図２】図２（ａ）は、第２の発明の実施の形態に係わる鋸刃の一部分を歯先側からみた図であって、図２（ｂ）は、第２の発明の実施の形態に係わる鋸刃の一部分の歯先側面図であって、図２（ｃ）は、第２の発明の実施の形態に係わる鋸刃の断面図である。
【図３】図３（ａ）は、第３の発明の実施の形態に係わる鋸刃の一部分を歯先側からみた図であって、図３（ｂ）は、第３の発明の実施の形態に係わる鋸刃の一部分の右側面図であって、図３（ｃ）は、第３の発明の実施の形態に係わる鋸刃の断面図である。
【図４】図４（ａ）は、発明品▲１▼と従来品▲１▼における切断面積と切削抵抗の関係を示す図であって、図４（ｂ）は、発明品▲１▼と従来品▲１▼における切断面積と切削騒音との関係を示す図であって、図４（ｃ）は、発明品▲１▼と従来品▲１▼における切断面積と切曲り量との関係を示す図であって、図４（ｄ）は、発明品▲１▼と従来品▲１▼における切断面の面粗さを示す図である。
【図５】図５（ａ）は、発明品▲２▼と従来品▲２▼における切断面積と切削抵抗の関係を示す図であって、図５（ｂ）は、発明品▲２▼と従来品▲２▼における切断面積と切削騒音との関係を示す図であって、図５（ｃ）は、発明品▲２▼と従来品▲２▼における切断面積と切曲り量との関係を示す図であって、図５（ｄ）は、発明品▲２▼と従来品▲２▼における切断面の面粗さを示す図である。
【図６】図６（ａ）は、発明品▲３▼と従来品▲３▼における切断面積と切削抵抗の関係を示す図であって、図６（ｂ）は、発明品▲３▼と従来品▲３▼における切断面積と切削騒音との関係を示す図であって、図６（ｃ）は、発明品▲３▼と従来品▲３▼における切断面積と切曲り量との関係を示す図であって、図６（ｄ）は、発明品▲３▼と従来品▲３▼における切断面の面粗さを示す図である。
【図７】図７（ａ）は、ＲＳＬ配列パターンを示す歯先側からみた図であって、図７（ｂ）は、ＲＳＬ配列パターンを示す歯先側面図である。
【図８】図８（ａ）は、ＬＳＲ配列パターンを示す歯先側からみた図であって、図８（ｂ）は、ＬＳＲ配列パターンを示す歯先側面図である。
【図９】図９（ａ）は、一般的な第１の鋸刃の一部分を歯先側からみた図であって、図９（ｂ）は、一般的な第１の鋸刃の歯先側面図であって、図９（ｃ）は、一般的な第１の鋸刃の断面図である。
【図１０】図１０（ａ）は、一般的な第２の鋸刃の一部分を歯先側からみた図であって、図１０（ｂ）は、一般的な第２の鋸刃の歯先側面図であって、図１０（ｃ）は、一般的な第２の鋸刃の断面図である。
【図１１】図１１（ａ）は、一般的な第３の鋸刃の一部分を歯先側からみた図であって、図１１（ｂ）は、一般的な第３の鋸刃の歯先側面図であって、図１１（ｃ）は、一般的な第３の鋸刃の断面図である。
【符号の説明】
１３鋸刃
１５第１切断歯群
１７第２切断歯群
１９切断歯群セット
２１鋸刃
２３第１切断歯群
２５第２切断歯群
２７切断歯群セット
２９鋸刃
３１第１切断歯群
３３第２切断歯群
３５切断歯群セット
Ｓ直歯
Ｒ右アサリ歯
Ｌ左アサリ歯[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a saw blade such as a band saw blade, a circular saw blade, a hacksaw and a hole saw used for cutting a workpiece.
[0002]
[Prior art]
Conventionally, a band saw machine has been widely used, for example, when cutting a metal workpiece, and various research and development have been made on a saw blade as a cutting tool of the band saw machine. Saw blades have been commonly used.
[0003]
That is, as shown in FIG. 9, the general first saw blade 1 has a large number of cutting tooth groups 3 (only one cutting tooth group 3 is shown in FIGS. 9A and 9B). Equipped. Each cutting tooth group 3 follows one straight tooth S and the right direction (FIG. 9A) when viewed from one straight tooth S and the saw blade advancing direction (right direction in FIGS. 9A and 9B). 9B, a plurality of right set teeth R oscillated in a downward direction, a front direction toward the paper surface in FIG. 9B, and a left direction in FIG. 9C), and a straight tooth S following the saw blade traveling direction. And a plurality of left set teeth L which are swung leftward (upward in FIG. 9A, backward in FIG. 9B toward the paper surface, rightward in FIG. 9C). . Here, the plurality of right set teeth R and the plurality of left set teeth L are arranged alternately.
[0004]
In order to easily cut a workpiece made of a difficult-to-cut material such as stainless steel or alloy tool steel, the height of the set teeth R and L is changed, and the amount of the set teeth R and L is changed. are doing.
[0005]
That is, as shown in FIG. 10, a general second saw blade 5 has a large number of cutting teeth groups 7 (see FIGS. 10 (a) and (b)) similarly to the general first saw blade 1. Is provided with only one cutting tooth group 7 continuously, and each cutting tooth group 7 has one straight tooth S and a saw blade traveling direction (rightward in FIGS. 10A and 10B). Direction), a plurality of right set teeth R following the straight tooth S and a plurality of left set teeth L following the straight tooth S as viewed from the saw blade advancing direction. Here, in each of the cut tooth groups 7, a right set tooth having a low tooth height, a left set tooth L having a high tooth height, a right set tooth R having a high tooth height, and a left set tooth L having a low tooth height are respectively provided. The saw blades are sequentially arranged in the direction opposite to the traveling direction of the saw blade.
[0006]
Further, as shown in FIG. 11, a general third saw blade 9 has a large number of cutting teeth groups 11 (see FIGS. 11 (a) and (b)) similarly to the general first saw blade 1. Is provided with only one cutting tooth group 11 continuously, and each cutting tooth group 11 has one straight tooth S and the saw blade traveling direction (see FIGS. 11A and 11B). When viewed from the right side), it is composed of a plurality of right set teeth R and a plurality of right set teeth L following the straight tooth S. Here, in each of the cut tooth groups 11, a right set tooth Rw having a low tooth height and a large swing amount, a left set tooth Ln having a high tooth height and a small swing amount, a high tooth height and a swing amount are respectively provided. The right set teeth Rn having a small tooth height and the left set teeth Lw having a small tooth height and a large swing-out amount are sequentially arranged in the direction opposite to the traveling direction of the saw blade.
[0007]
In FIGS. 10B and 11B, Hi indicates that the tooth height is high, and Lo indicates that the tooth height is low.
[0008]
Further, in the saw blade 1 (5, 9) shown in FIGS. 9 to 11, the pitch between the teeth in the cutting tooth group 3 (7, 11) is made unequal in order to reduce the cutting noise. Some have done it.
[0009]
The following patent documents relate to the present invention.
[0010]
[Patent Document 1]
Japanese Patent No. 2853767
[0011]
[Patent Document 2]
Japanese Patent Publication No. 7-14572
[0012]
[Patent Document 3]
JP 2000-135675 A
[0013]
[Problems to be solved by the invention]
By the way, when viewed from the entire saw blade 1 (5, 9), as shown in FIG. 7, an RSL array in which the right set teeth R, the straight teeth S, and the left set teeth L are arranged in the order opposite to the saw blade traveling direction. As shown in FIG. 8, a pattern and any one of the same arrangement patterns of the LSR arrangement patterns arranged in the opposite direction in the order of the left set teeth L, the straight teeth S, and the right set teeth R are repeatedly present. .
[0014]
On the other hand, when entering the workpiece, the straight teeth S are not directly swung, but the right set teeth R are swung to the left and the left set teeth L are swung to the right. The straight teeth S constituting the LSR array pattern are inclined leftward by the right set teeth R (the immediately preceding set teeth) to enter the work piece, and the straight teeth S forming the LSR arrangement pattern are set to the left set teeth L (the immediately preceding set teeth R). The set is tilted to the right to enter the workpiece.
[0015]
Therefore, when cutting the workpiece, the large number of straight teeth S are inclined in one direction (rightward or leftward) and sequentially enter the workpiece, so that the straightness of the saw blade 1 (5, 9) is sufficient. , The bending of the saw blade 1 (5, 9) becomes large, and it becomes difficult to extend the life of the saw blade.
[0016]
Further, it is not enough to reduce the cutting noise simply by making the pitch between the teeth of the saw blade 1 (5, 9) unequal, and the environmental problem is one of the important social problems these days. In view of the situation, it is necessary to further improve the working environment.
[0017]
[Means for Solving the Problems]
In the invention according to claim 1, in a saw blade including a large number of straight teeth and a large number of set teeth,
A first cutting tooth group consisting of an even number of the set teeth following the straight tooth as viewed from one straight tooth and the saw blade traveling direction, and one straight tooth and the saw blade traveling direction from the straight tooth. A second cut tooth group consisting of an odd number of the set teeth following the straight tooth is arranged so as to be alternately repeated many times,
When viewed from the saw blade advancing direction, the dispensing direction of the immediately preceding set tooth is immediately opposite to each straight tooth, and when viewed from the saw blade advancing direction, the dispensing direction of the immediately following set tooth is opposite to the straight tooth. , Respectively.
[0018]
According to the first aspect of the present invention, the direction in which the set teeth immediately precede each straight tooth and the direction in which the immediately following set teeth immediately follow each straight tooth are opposite. Since the number of the set teeth in the first cut tooth group and the number of the set teeth in the second cut tooth group are different, the right set tooth and the straight tooth are viewed from the whole saw blade. The same number of the RSL array patterns arranged in the opposite direction of the saw blade traveling direction in the order of the left set teeth and the LSR array patterns arranged in the opposite direction in the order of the left set teeth, the straight teeth, and the right set teeth. Will exist. Therefore, when viewed from the entire saw blade, the same number of the straight teeth that tilt to the right when entering the workpiece and the same number of the straight teeth that tilt to the left when entering the workpiece are present. Acts so that the force to turn to the right and the force to turn the straight teeth to the left cancel each other out.
[0019]
Further, since the number of the set teeth in the first cut tooth group and the number of the set teeth in the second cut tooth group are different, the interval between the adjacent straight teeth (straight tooth interval) is constant when viewed from the entire saw blade. Instead, the straight tooth interval can be roughly divided into a long straight tooth interval and a short straight tooth interval according to the difference in the number of the set teeth in the two cut tooth groups. Therefore, not only does the rush period of the straight teeth into the workpiece during the cutting of the workpiece differ, but also the vibration in the blade width direction of the saw blade based on the long straight tooth spacing and the saw blade based on the short straight tooth spacing. The vibrations in the blade width direction are generated alternately, and the two vibrations interfere with each other to cancel each other.
[0020]
In the invention according to claim 2, in addition to the matters specifying the invention according to claim 1, the adjacent first cutting tooth group and the second cutting tooth group are respectively set as cutting tooth group sets,
When viewed from the saw blade advancing direction, the leading pattern of the plurality of set teeth in the preceding set of cutting teeth and the leading pattern of the plurality of set teeth in the subsequent set of cutting teeth are opposite. It is characterized by comprising each.
[0021]
Note that the set pattern of the plurality of set teeth in the cut tooth group set has the same meaning as the arrangement pattern of the left set teeth and the right set tooth in the cut tooth group set.
[0022]
According to the second aspect of the present invention, in addition to the function of the first aspect of the present invention, a pattern of the plurality of set teeth set in the preceding set of cutting teeth and the subsequent cutting are provided. Since the set patterns of the plurality of set teeth in the tooth group set are set to be opposite to each other, the run-out and vibration in the blade thickness direction (left-right direction) of the saw blade due to the cutting of the preceding cut tooth group set, and the subsequent The vibration and the vibration in the blade thickness direction of the saw blade caused by the cutting by the cutting tooth group set act so as to cancel each other.
[0023]
According to a third aspect of the present invention, in addition to the first and second aspects of the present invention, the amount of projection of all set teeth is substantially the same.
[0024]
According to the third aspect of the present invention, the same operation as that of the first or second aspect of the present invention is achieved.
[0025]
In the invention according to claim 4, in addition to the invention-specifying matter according to claim 1 or claim 2, the amount of set-out of the set teeth in all the first cut tooth groups is substantially the same. The set-out amount of the set teeth in all the second cut-tooth groups is substantially the same, and the set-out amount of the set teeth in the first cut-tooth group and the set-out amount of the set teeth in the second cut-tooth group. Are different from each other.
[0026]
According to the fourth aspect of the present invention, in addition to the effect of the first or second aspect of the present invention, the amount of the set teeth protruded and the second cut teeth in the first cut tooth group are provided. Since the amount of the set teeth is different in the group, it is easy to cut a workpiece made of a difficult-to-cut material such as stainless steel or alloy tool steel.
[0027]
The invention according to claim 5 is characterized in that, in addition to the matters specifying the invention according to claim 1 or 2, the height of all set teeth is substantially the same.
[0028]
According to the fifth aspect of the present invention, the same operation as that of the first or second aspect of the present invention is provided.
[0029]
In the invention according to claim 6, in addition to the invention-specifying matter according to claim 1 or 2, the height of the set teeth in all the first cut tooth groups is substantially the same. The tooth height of the set teeth in all the second cut tooth groups is substantially the same, and the tooth height of the set teeth in the first cut tooth group and the tooth height of the set teeth in the second cut tooth group Are different from each other.
[0030]
According to the sixth aspect of the present invention, in addition to the function of the first or second aspect of the present invention, the height of the set teeth and the second cut teeth in the first cut tooth group are provided. Since the tooth heights of the set teeth in the group are different, it is easy to cut a workpiece made of a difficult-to-cut material such as stainless steel or alloy tool steel.
[0031]
In the invention according to claim 7, in addition to the invention-specifying matter according to any one of claims 1 to 6, the inter-dental pitch in each first cut tooth group and each It is characterized in that the inter-tooth pitches in the two cut tooth groups are each constituted by an unequal pitch.
[0032]
According to the seventh aspect of the present invention, the same effect as that of the first aspect of the present invention is obtained.
[0033]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0034]
FIG. 1A is a view of a part of a saw blade according to an embodiment of the first invention viewed from a tooth tip side, and FIG. 1B is a saw according to an embodiment of the first invention. FIG. 1C is a side view of a tooth tip of a part of the blade, and FIG. 1C is a cross-sectional view of the saw blade according to the embodiment of the first invention.
[0035]
As shown in FIG. 1, a saw blade 13 according to an embodiment of the first invention is used as a cutting tool for a band sawing machine, and has a large number of straight teeth S, a rightward direction (FIG. 1A). 1B, a large number of right set teeth swinging in a downward direction, a front direction toward the paper surface in FIG. 1B, a left direction in FIG. 1C), and a left direction (upward and in FIG. 1A). 1 (b), a large number of left set teeth that are swung in the reverse direction toward the paper surface and in the right direction in FIG. 1 (c).
[0036]
In the saw blade 13 according to the embodiment of the first invention, the first cutting tooth group 15 and the second cutting tooth group 17 are arranged so as to be alternately repeated many times. Here, the first group of cutting teeth 15 follows one straight tooth S and two straight teeth S following the straight tooth S when viewed from the saw blade traveling direction (rightward in FIGS. 1A and 1B). The second set of cutting teeth 17 is composed of one set of teeth R, L (L, R), and three straight teeth S and three succeeding three teeth following the straight tooth S when viewed from the advancing direction of the saw blade. Of the set teeth L, R, L (R, L, R). Note that the number of set teeth R and L in the first cut tooth group 15 need not be two if it is an even number, and three if the number of set teeth R and L in the second cut tooth group 17 is an odd number. It does not have to be.
[0037]
In addition, the direction in which the set teeth R (or L) immediately precede each straight tooth S when viewed from the saw blade advancing direction, and the direction immediately following each straight tooth S when viewed from the saw blade advancing direction. The set teeth L (or R) are configured so that their swinging directions are opposite.
[0038]
Further, the adjacent first cutting tooth group 15 and second cutting tooth group 17 are respectively referred to as a cutting tooth group set 19, and a plurality of set teeth R in the preceding cutting tooth group set 19 are viewed from the saw blade traveling direction. , L, and the pattern of the plurality of set teeth R, L in the subsequent cut tooth group set 19 are configured to be opposite to each other. Note that the pattern of the plurality of set teeth R and L in the cut tooth group set 19 is the same as the arrangement pattern of the right set teeth R and the left set teeth L in the cut tooth group set 19.
[0039]
Further, the amounts of protrusion of all the set teeth R and L are substantially the same, and the tooth heights of all the set teeth R and L are substantially the same. Further, the inter-tooth pitch in each first cut tooth group 15 is constituted by an unequal pitch like P1, P2, P3, and the inter-tooth pitch in each second cut tooth group 17 is P4, P5, P6. , P7, are formed with unequal pitches.
[0040]
Next, the operation of the embodiment of the first invention will be described.
[0041]
Since the direction in which the immediately preceding set tooth R (or L) is projected is opposite to the direction in which the immediately following set tooth L (or R) is projected, the set tooth R, L in the first cut tooth group 15 and the second set tooth R, L are arranged in the opposite direction. Due to the fact that the number of set teeth R and L in the cut tooth group 17 is different, when viewed from the entire saw blade 13, the right set tooth R, the straight tooth S and the left set tooth L are arranged in the opposite direction to the saw blade traveling direction. The same number of RSL arrangement patterns (see FIG. 7) and LSR arrangement patterns (see FIG. 8) arranged in the opposite direction in the order of left set teeth L, straight teeth S and right set teeth R exist in this order. . Therefore, when viewed from the entire saw blade 13, the same number of straight teeth S inclined to the right when entering the workpiece (not shown) and the same number of straight teeth S inclined to the left when entering the workpiece are present. , And the force by which the straight teeth S bend to the right and the force by which the straight teeth S bend to the left act to cancel each other out.
[0042]
In addition, since the number of set teeth R, L in the first cut tooth group 15 and the number of set teeth R, L in the second cut tooth group 17 are different, the distance between the adjacent straight teeth S when viewed from the entire saw blade 13 (straight tooth) The distance between the straight teeth can be roughly divided into a long straight tooth gap and a short straight tooth gap according to the difference in the number of set teeth R and L in the two cut tooth groups 15 and 17. Therefore, not only does the cycle of the straight teeth S entering the workpiece during cutting of the workpiece differ, but also the vibration in the blade width direction of the saw blade 13 based on the long straight tooth spacing and the sawing based on the short straight tooth spacing. Vibration of the blade 13 in the blade width direction is generated alternately, and the vibrations of both act to interfere and cancel each other.
[0043]
Furthermore, since the pattern of the plurality of set teeth R, L in the preceding cut tooth group set 19 and the pattern of the plurality of set teeth R, L in the subsequent cut tooth group set 19 are made opposite to each other. The deflection and vibration of the saw blade 13 in the blade thickness direction (left-right direction) due to the cutting of the preceding cutting tooth group set 19 and the deflection and vibration of the saw blade 13 in the blade thickness direction due to the cutting by the succeeding cutting tooth group set 19. Act to cancel each other out.
[0044]
As described above, according to the first embodiment of the present invention, the force of the right teeth S to bend rightward and the force of the right teeth S to turn left act so as to cancel each other. Therefore, the straightness of the saw blade 13 is improved, the cutting and bending of the saw blade 13 can be suppressed, and the life of the saw blade 13 can be extended.
[0045]
In addition, not only does the cycle of the straight teeth S entering the workpiece during the cutting of the workpiece differ, but also the vibration in the blade width direction of the saw blade 13 based on the long straight tooth spacing and the sawing based on the short straight tooth spacing. Since the vibrations of the blade 13 in the blade width direction are generated alternately and they act so as to interfere with each other and cancel each other, the cutting noise of the saw blade 13 is reduced, the working environment is improved, and Tooth chipping (including chipping) can be minimized to further extend the life of the saw blade.
[0046]
Furthermore, the run-out and vibration of the saw blade 13 in the blade thickness direction due to the cutting of the preceding cutting tooth set 19 and the run-out and vibration of the saw blade 13 in the blade thickness direction due to the cutting by the subsequent cutting tooth set 19 are respectively Since they act so as to cancel each other, the straightness of the saw blade 13 is further improved, and the life of the saw blade can be further extended. In addition, the noise of the saw blade 13 can be further reduced, and the working environment can be further improved. it can.
[0047]
FIG. 2A is a view of a part of a saw blade according to the second embodiment of the present invention viewed from the tooth tip side, and FIG. 2B is a saw according to the second embodiment of the present invention. FIG. 2C is a side view of a tooth tip of a part of the blade, and FIG. 2C is a sectional view of a saw blade according to the second embodiment of the present invention.
[0048]
The saw blade 21 according to the second embodiment of the invention has a large number of straight teeth S, a large number of right set teeth R, and a large number of right set teeth R, similarly to the saw blade 13 according to the first embodiment of the invention. The first set of teeth 23 and the second set of teeth 25 are arranged alternately a number of times.
[0049]
Further, when viewed from the saw blade advancing direction (rightward in FIGS. 2A and 2B), the swinging direction of the immediately preceding set tooth R (or L) with respect to each straight tooth S and the saw When viewed from the blade advancing direction, each of the straight teeth S is configured such that the immediately following set teeth L (or R) swing out in the opposite direction. Further, the adjacent first cutting tooth group 23 and the second cutting tooth group 25 are respectively set as a cutting tooth group set 27, and a plurality of set teeth R in the preceding cutting tooth group set 27 when viewed from the saw blade traveling direction. , L, and the set pattern of the plurality of set teeth R, L in the subsequent cut tooth group set 27 are configured to be opposite to each other.
[0050]
In addition, all the set teeth R and L are almost the same, and the set heights of the set teeth R and L in all the first cut tooth groups 23 are substantially the same, and all the second cut tooth groups are set. 25, the tooth heights of the set teeth R and L are substantially the same. The tooth height of the set teeth R, L in the first cut tooth group 23 is high, and the tooth height of the set teeth R, L in the second cut tooth group 25 is low. In FIG. 2B, Hi indicates that the tooth height is high, and Lo indicates that the tooth height is low.
[0051]
Further, the inter-tooth pitch in each first cut tooth group 23 is constituted by an unequal pitch like P1, P2, P3, and the inter-tooth pitch in each second cut tooth group 25 is P4, P5, P6. , P7, are formed with unequal pitches.
[0052]
Even in the embodiment of the second invention, the same operation and effect as the embodiment of the first invention are exerted.
[0053]
In the embodiment of the second invention, the tooth height of the set teeth R, L in the first cut tooth group 23 and the tooth height of the set teeth R, L in the second cut tooth group 25 are different. Therefore, it becomes easier to cut a workpiece made of a difficult-to-cut material such as stainless steel or alloy tool steel.
[0054]
FIG. 3A is a view of a part of a saw blade according to an embodiment of the third invention viewed from a tooth tip side, and FIG. 3B is a saw according to an embodiment of the third invention. FIG. 3C is a side view of a tooth tip of a part of the blade, and FIG. 3C is a cross-sectional view of the saw blade according to the third embodiment of the present invention.
[0055]
The saw blade 29 according to the third embodiment of the present invention has a large number of straight teeth S, a large number of right set teeth R, and a large number of right set teeth R, similarly to the saw blade 13 according to the first embodiment of the present invention. It is provided with a left set tooth L, and is arranged so that the first cut tooth group 31 and the second cut tooth group 33 are alternately repeated many times.
[0056]
In addition, when viewed from the saw blade advancing direction (rightward in FIGS. 3A and 3B), the swing direction of the immediately preceding set tooth R (or L) with respect to each straight tooth S and the saw When viewed from the blade advancing direction, each of the straight teeth S is configured such that the immediately following set teeth L (or R) swing out in the opposite direction. Furthermore, the adjacent first cutting tooth group 31 and second cutting tooth group 33 are respectively set as a cutting tooth group set 35, and a plurality of set teeth R in the preceding cutting tooth group set 35 when viewed from the saw blade traveling direction. , L and the pattern of the plurality of set teeth R, L in the subsequent cut tooth group set 35 are configured to be opposite to each other.
[0057]
In addition, the amounts of the set teeth R and L in all the first cut tooth groups 31 are substantially the same, and the amounts of the set teeth R and L in all the second cut tooth groups 33 are substantially the same. . Then, the set amount of the set teeth Rn (R) and Ln (L) in the first cut tooth group 31 is small, and the set amount of the set teeth Rw (R) and Lw (L) in the second cut tooth group 33 is large. ing.
[0058]
In addition, the tooth heights of the set teeth R and L in all the first cut tooth groups 31 are substantially the same, and the tooth heights of the set teeth R and L in all the second cut tooth groups 33 are substantially the same. . The tooth height of the set teeth R, L in the first cut tooth group 31 is different from the tooth height of the set teeth R, L in the second cut tooth group 33. In FIG. 3B, Hi indicates that the tooth height is high, and Lo indicates that the tooth height is low.
[0059]
Further, the inter-tooth pitch in each first cut tooth group is constituted by an unequal pitch like P1, P2, P3, and the inter-tooth pitch in each second cut tooth group is P4, P5, P6, P7. Each is constituted by an unequal pitch.
[0060]
Even in the third embodiment, the same operation and effect as those of the first embodiment are exerted.
[0061]
In the embodiment of the third invention, the amount of the set teeth R and L in the first group 31 is different from the amount of the set teeth R and L in the second group 33. In addition, since the tooth heights of the set teeth R and L in the first cut tooth group 33 are different from the tooth heights of the set teeth R and L in the second cut tooth group 33, difficult-to-cut materials such as stainless steel and alloy tool steel are used. Cutting of a workpiece made of
[0062]
The present invention is not limited to the description of the embodiment of the invention described above, and can be implemented in various other modes by making appropriate changes.
[0063]
【Example】
Next, embodiments will be briefly described.
[0064]
FIG. 4 (a) is a diagram showing the relationship between the cutting area and the cutting resistance between the invention product (1) and the conventional product (1), and FIG. 4 (b) shows the relationship between the invention product (1) and the conventional product (1). FIG. 4C is a diagram showing the relationship between the cutting area and the cutting noise in ▼, and FIG. 4C is a diagram showing the relationship between the cutting area and the amount of bending in the invention product (1) and the conventional product (1). FIG. 4D is a diagram showing the surface roughness of the cut surface of the invention product [1] and the conventional product [1], and FIG. 5 (a) is the invention product [2] and the conventional product [1]. FIG. 5B is a diagram showing a relationship between a cutting area and cutting resistance in 2), and FIG. 5B is a diagram showing a relationship between a cutting area and cutting noise in the invention product 2 and the conventional product 2; FIG. 5 (c) is a view showing the relationship between the cutting area and the amount of bending in the invention product (2) and the conventional product (2). FIG. 5 (d) shows the relationship between the invention product (2) and the conventional product (2). Product ▲ 2 6 (a) is a diagram showing the relationship between the cutting area and the cutting resistance in the invention product [3] and the conventional product [3], and FIG. FIG. 6B is a diagram showing the relationship between the cutting area and the cutting noise in the invention product [3] and the conventional product [3], and FIG. 6 (c) shows the relationship between the invention product [3] and the conventional product [3]. FIG. 6D is a diagram illustrating a relationship between a cutting area and a bending amount, and FIG. 6D is a diagram illustrating a surface roughness of a cut surface in the invention product [3] and the conventional product [3].
[0065]
As shown in FIGS. 4 (a), 4 (b) and 4 (c), when the workpiece made of S45C is cut by the invention (1) (the saw blade 13 according to the first embodiment of the present invention), The cutting resistance and the cutting noise can be reduced, and the cutting amount can be reduced to improve the life of the saw blade, as compared with the case of cutting a workpiece made of S45C by the conventional product (1) (conventional saw blade 1). It was confirmed that. Further, as shown in FIG. 4 (d), even when the workpiece made of S45C is cut by the invention product (1), the work piece made of S45C is cut by the conventional product (1) (conventional saw blade 1). It was confirmed that the cut surface of the work piece was finely finished as in the case of the above.
[0066]
Also, as shown in FIGS. 5A, 5B and 5C, a case in which a workpiece made of SUS304 is cut by the invention (2) (saw blade 21 according to the second embodiment of the invention). However, as compared with the case of cutting a workpiece made of SUS304 with the conventional product (2) (conventional saw blade 5), the cutting resistance and the cutting noise can be reduced, and the cutting amount is reduced to increase the life of the saw blade. It was confirmed to improve. Further, as shown in FIG. 5 (d), even when a workpiece made of SUS304 is cut by the invention product (2), the work piece made of SUS304 is cut by the conventional product (2) (conventional saw blade 5). It was confirmed that the cut surface of the work piece was finely finished as in the case of the above.
[0067]
Further, as shown in FIGS. 6A, 6B and 6C, a case in which a workpiece made of SKD61 is cut by the invention product (3) (saw blade 29 according to the third embodiment of the invention). However, as compared with the case of cutting a workpiece made of SKD61 with the conventional product (3) (conventional saw blade 9), the cutting resistance and the cutting noise can be reduced, and the cutting amount is reduced to increase the life of the saw blade. It was confirmed to improve. Further, as shown in FIG. 6D, when the work piece made of SKD61 is cut by the invention product (3), the work piece made of SKD61 is cut by the conventional product (3) (conventional saw blade 9). It was confirmed that the cut surface of the workpiece was finely finished compared to the case of cutting.
[0068]
【The invention's effect】
According to the invention described in any one of claims 1 to 7, the force by which the straight teeth bend to the right and the force by which the straight teeth bend to the left are different. Since they act so as to cancel each other, the straightness of the saw blade is improved, the cutting and bending of the saw blade can be suppressed, and the life of the saw blade can be extended.
[0069]
In addition, not only does the rush period of the straight teeth into the work piece differ during cutting of the workpiece, but also the vibration in the blade width direction of the saw blade based on the long straight tooth spacing, and the saw blade based on the short straight tooth spacing. Vibrating in the blade width direction alternately and acting so that they interfere with each other and cancel each other, so that the cutting noise of the saw blade is reduced, the working environment is improved, and the saw blade is chipped (chipping). ) As much as possible to further extend the life of the saw blade.
[0070]
According to the invention as set forth in any one of claims 2 to 7, deflection and vibration in the blade thickness direction (lateral direction) of the saw blade due to cutting of the preceding set of cutting teeth, and subsequent Since the run-out and vibration in the blade thickness direction of the saw blade due to cutting by the cutting tooth group set act to cancel each other, the straightness of the saw blade is further improved, and the life of the saw blade can be further extended. In addition to this, the noise of the saw blade can be further reduced, and the working environment can be further improved.
[Brief description of the drawings]
FIG. 1 (a) is a view of a part of a saw blade according to an embodiment of the first invention as viewed from a tooth tip side, and FIG. 1 (b) is a view of the embodiment of the first invention. FIG. 1C is a side view of a tooth tip of a part of the saw blade according to the embodiment, and FIG. 1C is a cross-sectional view of the saw blade according to the embodiment of the first invention.
FIG. 2 (a) is a view of a part of a saw blade according to an embodiment of the second invention as viewed from the tooth tip side, and FIG. 2 (b) is a view of the embodiment of the second invention. FIG. 2C is a side view of a tooth tip of a part of the saw blade according to the embodiment, and FIG. 2C is a cross-sectional view of the saw blade according to the embodiment of the second invention.
FIG. 3 (a) is a view of a part of a saw blade according to an embodiment of the third invention as viewed from the tooth tip side, and FIG. 3 (b) is a view of the embodiment of the third invention. FIG. 3C is a right side view of a part of the saw blade according to the embodiment, and FIG. 3C is a cross-sectional view of the saw blade according to the third embodiment of the present invention.
FIG. 4 (a) is a diagram showing the relationship between the cutting area and cutting resistance in the invention product (1) and the conventional product (1), and FIG. 4 (b) shows the relationship between the invention product (1) and the invention product (1). FIG. 4C is a diagram showing the relationship between the cutting area and the cutting noise in the conventional product (1), and FIG. 4C shows the relationship between the cutting area and the bending amount in the invention (1) and the conventional product (1). FIG. 4D is a diagram showing the surface roughness of the cut surface of the invention product (1) and the conventional product (1).
FIG. 5 (a) is a diagram showing the relationship between the cutting area and the cutting resistance in the invention product (2) and the conventional product (2), and FIG. 5 (b) shows the relationship between the invention product (2) and the invention product (2). FIG. 5C is a diagram showing the relationship between the cutting area and the cutting noise in the conventional product (2), and FIG. 5C shows the relationship between the cutting area and the amount of bending in the invention (2) and the conventional product (2). FIG. 5D is a diagram showing the surface roughness of the cut surface of the invention product (2) and the conventional product (2).
FIG. 6 (a) is a diagram showing the relationship between the cutting area and the cutting resistance in the invention product (3) and the conventional product (3), and FIG. 6 (b) shows the relationship between the invention product (3) and the invention product (3). FIG. 6C is a diagram showing the relationship between the cutting area and the cutting noise in the conventional product (3), and FIG. 6C shows the relationship between the cutting area and the amount of bending in the invention (3) and the conventional product (3). FIG. 6D is a view showing the surface roughness of the cut surface of the invention product (3) and the conventional product (3).
FIG. 7A is a diagram showing the RSL array pattern as viewed from the tooth tip side, and FIG. 7B is a tooth tip side view showing the RSL array pattern.
FIG. 8A is a diagram showing the LSR arrangement pattern as viewed from the tooth tip side, and FIG. 8B is a tooth tip side view showing the LSR arrangement pattern.
FIG. 9A is a view of a part of a general first saw blade viewed from the tooth tip side, and FIG. 9B is a tooth tip of a general first saw blade. FIG. 9C is a side view, and is a cross-sectional view of a general first saw blade.
FIG. 10 (a) is a view of a part of a general second saw blade viewed from the tooth tip side, and FIG. 10 (b) is a tooth tip of a general second saw blade. FIG. 10C is a side view, and FIG. 10C is a cross-sectional view of a general second saw blade.
11 (a) is a view of a part of a general third saw blade viewed from the tooth tip side, and FIG. 11 (b) is a tooth tip of a general third saw blade. FIG. 11C is a cross-sectional view of a general third saw blade.
[Explanation of symbols]
13 saw blade
15 First cut teeth group
17 Second cut teeth group
19 Cut teeth group set
21 saw blade
23 First cut teeth group
25 Second cut teeth group
27 Cutting tooth group set
29 saw blade
31 First cut teeth group
33 Second cut teeth group
35 Cutting tooth group set
S straight teeth
R right set tooth
L Left set tooth

Claims

In a saw blade having a number of straight teeth and a number of set teeth,
A first cutting tooth group consisting of an even number of the set teeth following the straight tooth as viewed from one straight tooth and the saw blade traveling direction, and one straight tooth and the saw blade traveling direction from the straight tooth. A second cut tooth group consisting of an odd number of the set teeth following the straight tooth is arranged so as to be alternately repeated many times,
When viewed from the saw blade advancing direction, the dispensing direction of the immediately preceding set tooth is immediately opposite to each straight tooth, and when viewed from the saw blade advancing direction, the dispensing direction of the immediately following set tooth is opposite to the straight tooth. A saw blade characterized by being configured so that

The first cutting tooth group and the second cutting tooth group adjacent to each other are each set as a cutting tooth group set,
When viewed from the saw blade advancing direction, the leading pattern of the plurality of set teeth in the preceding set of cutting teeth and the leading pattern of the plurality of set teeth in the subsequent set of cutting teeth are opposite. The saw blade according to claim 1, wherein each of the saw blades is configured.

The saw blade according to claim 1 or 2, wherein the set amounts of all set teeth are substantially the same.

The amount of the set tooth set in all the first cut tooth groups is substantially the same, and the amount of the set tooth set in all the second cut tooth groups is substantially the same. 3. The saw blade according to claim 1, wherein an amount of projection of the set teeth in the step (c) is different from an amount of projection of the set teeth in the second cut tooth group.

The saw blade according to claim 1 or 2, wherein the tooth heights of all set teeth are substantially the same.

The tooth heights of the set teeth in all the first cut tooth groups are substantially the same, and the tooth heights of the set teeth in all the second cut tooth groups are substantially the same, and the first cut tooth group is 3. The saw blade according to claim 1, wherein the tooth height of the set tooth in the second set of teeth is different from the tooth height of the set tooth.

The interdental pitch in each of the first cut tooth groups and the interdental pitch in each of the second cut tooth groups are respectively constituted by unequal pitches. The saw blade according to the item.