JP2010214489A - Rotary cutting tool - Google Patents

Rotary cutting tool Download PDF

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Publication number
JP2010214489A
JP2010214489A JP2009061715A JP2009061715A JP2010214489A JP 2010214489 A JP2010214489 A JP 2010214489A JP 2009061715 A JP2009061715 A JP 2009061715A JP 2009061715 A JP2009061715 A JP 2009061715A JP 2010214489 A JP2010214489 A JP 2010214489A
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JP
Japan
Prior art keywords
blade
rotary cutting
cutting tool
mandrel
tip
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Pending
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JP2009061715A
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Japanese (ja)
Inventor
Hiroichi Murayama
博一 村山
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Toshiba Corp
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Toshiba Corp
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Publication date
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Priority to JP2009061715A priority Critical patent/JP2010214489A/en
Publication of JP2010214489A publication Critical patent/JP2010214489A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary cutting tool allowing partial replacement of a part of a blade part. <P>SOLUTION: This rotary cutting tool has a blade end diameter on an outer periphery of the blade part gradually reduced in size toward a distal end part in the longitudinal direction of a rotary shaft of the tool, while repeating increase and decrease, and a machining groove. The rotary cutting tool is constituted of a mandrel supporting the blade part and becoming the rotary shaft, a tool supporting member supporting the mandrel at an end part on an opposite side of a distal end part side of the blade part, and the blade part constituted of a plurality of blade part units including a distal end part unit. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、主に溝加工に用いる回転切削工具に関する。   The present invention relates to a rotary cutting tool mainly used for grooving.

タービンロータの回転軸に羽根を取り付ける溝は形状が複雑である。溝中心に対して左
右対称でかつクリスマスツリーを逆さまにしたように溝の深さ方向において溝幅が増減し
ながら徐々に狭くなっている。このようなツリー形溝を切削加工するための工具として、
図８に示すように外周切れ刃の刃先径が、ツリー形溝の溝幅の変化に対応して工具の先端
側へ向かうに従って増減しながら徐々に小径となる回転切削工具、すなわちクリスマスカ
ッタが知られている。クリスマスカッタは刃部が長いために切削中の抵抗が大きくなるの
で工具径の細い部分は特に破損しやすくなる。この問題を解決すべく、加工中の切削抵抗
を軽減する手段が考えられてきた。その一例としてすくい角を変更したもの（特許文献１
）、逃げ角を変更したもの(特許文献２)などが挙げられる。 The groove for attaching the blade to the rotating shaft of the turbine rotor has a complicated shape. It is symmetrical with respect to the center of the groove and is gradually narrowed while increasing or decreasing the groove width in the groove depth direction so that the Christmas tree is turned upside down. As a tool for cutting such tree-shaped grooves,
As shown in FIG. 8, there is known a rotary cutting tool, that is, a Christmas cutter, in which the cutting edge diameter of the outer peripheral cutting edge gradually increases and decreases toward the tip side of the tool in response to the change in the groove width of the tree-shaped groove. It has been. Since the Christmas cutter has a long blade portion, the resistance during cutting increases, so that a portion with a small tool diameter is particularly easily damaged. In order to solve this problem, means for reducing cutting resistance during processing has been considered. As an example, the rake angle is changed (Patent Document 1).
), And a modified clearance angle (Patent Document 2).

特開２００１−７１２１０号公報JP 2001-72110 A 特開２００７−１７５８３０号公報JP 2007-175830 A

しかしながら、特許文献１、２に開示がされている回転切削工具においても、刃部の一
部が欠損することは避けられない。また、工具の一部における刃部の磨耗による切削性能
の低下であっても工具一体を交換しなければならない。一方で、クリスマスカッタは高価
であるため、工具の一部における刃部の切削性能の低下によって工具一体を交換すること
はコスト面で不利である。 However, even in the rotary cutting tools disclosed in Patent Documents 1 and 2, it is inevitable that a part of the blade portion is lost. Even if the cutting performance is deteriorated due to wear of the blade portion in a part of the tool, the tool unit must be replaced. On the other hand, since the Christmas cutter is expensive, it is disadvantageous in terms of cost to replace the tool unit due to a reduction in the cutting performance of the blade part in a part of the tool.

本発明はこのような事情に鑑みてなされたもので、その目的は刃部の一部を部分的に交
換可能な回転切削工具を提供することを目的とする。 This invention is made | formed in view of such a situation, The objective is to provide the rotary cutting tool which can replace | exchange part of a blade part partially.

本発明の一態様によれば、刃部の外周の刃先径が工具の回転軸の長手方向における先端
部へ向かうに従って、増減しながら徐々に小さくなり、加工溝を有する回転切削工具にお
いて、前記切部を支持し回転軸となる心棒と、前記心棒を前記刃部の先端部側とは反対側
の端部で支持する工具支持部材と、前記刃部は先端部ユニットを含む複数の刃部ユニット
からなることを特徴とする回転切削工具が提供される。 According to one aspect of the present invention, in the rotary cutting tool having a machining groove, the cutting edge diameter on the outer periphery of the blade portion gradually decreases as it increases and decreases toward the tip portion in the longitudinal direction of the rotation axis of the tool. A mandrel that supports the shaft and serves as a rotating shaft, a tool support member that supports the mandrel at an end opposite to the tip of the blade, and a plurality of blade units each including a tip unit. A rotary cutting tool is provided.

本発明によれば、工具の刃部を分割可能な構造にすることで刃部の交換を効率良くおこ
なうことができる回転切削工具が提供される。 ADVANTAGE OF THE INVENTION According to this invention, the rotary cutting tool which can perform replacement | exchange of a blade part efficiently by making it the structure which can divide | segment a blade part of a tool is provided.

本発明の実施の形態に係る回転切削工具を例示するための模式図である。It is a mimetic diagram for illustrating the rotary cutting tool concerning an embodiment of the invention. 本発明の実施の形態に係る回転切削工具を例示するための模式分解図である。It is a model exploded view for illustrating the rotary cutting tool which concerns on embodiment of this invention. 本発明の実施の形態に係る回転切削工具を例示するための模式分解図である。It is a model exploded view for illustrating the rotary cutting tool which concerns on embodiment of this invention. 本発明の実施の形態に係る回転切削工具を例示するための断面図である。It is sectional drawing for illustrating the rotary cutting tool which concerns on embodiment of this invention. 本発明の実施の形態に係る回転切削工具を例示するための模式分解図である。It is a model exploded view for illustrating the rotary cutting tool which concerns on embodiment of this invention. 本発明の実施の形態に係る回転切削工具を例示するための模式図である。It is a mimetic diagram for illustrating the rotary cutting tool concerning an embodiment of the invention. 本発明の実施の形態に係る回転切削工具を例示するための模式図である。It is a mimetic diagram for illustrating the rotary cutting tool concerning an embodiment of the invention. 回転切削工具を例示するための模式図である。It is a schematic diagram for illustrating a rotary cutting tool.

以下、図面を参照しつつ、本発明の実施の形態について例示をする。尚、各図面中、同
様の構成要素には同一の符号を付して詳細な説明は適宜省略する。
図１は、本発明の実施の形態に係る回転切削工具の模式図であり、図８と比べ簡略化し
ている。工具を支持する部材であるシャンク２に固定された刃部１が点線部において分割
できるようになっている。 Hereinafter, embodiments of the present invention will be illustrated with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
FIG. 1 is a schematic diagram of a rotary cutting tool according to an embodiment of the present invention, which is simplified compared to FIG. The blade part 1 fixed to the shank 2 which is a member that supports the tool can be divided at the dotted line part.

本発明の第１の実施の形態について説明をする。図２は図１で示した点線において、刃
部１をユニットに分割した模式分解図である。刃部１は先端刃部３、中間刃部である第１
の中間刃部５、第２の中間刃部６からなり、心棒７を軸に構成されている。心棒７はシャ
ンク２と結合され、工具の回転軸と同心になるように設けられている。心棒７の外径は一
定である。第１の中間刃部５、第２の中間刃部６は切削工具の回転軸、すなわち心棒７と
同心になるように設けられた貫通穴１０、１１を有する。貫通穴１０、１１の貫通穴径は
一定にする。心棒７を第１の中間刃部５、第２の中間刃部６の貫通穴１０、１１に通し、
心棒７と貫通穴１０、１１との間にすき間を有する嵌め合い、すなわち、すきまばめの状
態にする。 A first embodiment of the present invention will be described. FIG. 2 is a schematic exploded view in which the blade portion 1 is divided into units along the dotted line shown in FIG. The blade 1 is a tip blade 3 and a first blade that is an intermediate blade.
The intermediate blade portion 5 and the second intermediate blade portion 6 are configured with a mandrel 7 as an axis. The mandrel 7 is connected to the shank 2 and is provided so as to be concentric with the rotation axis of the tool. The outer diameter of the mandrel 7 is constant. The first intermediate blade portion 5 and the second intermediate blade portion 6 have through holes 10 and 11 provided so as to be concentric with the rotation axis of the cutting tool, that is, the mandrel 7. The through hole diameters of the through holes 10 and 11 are made constant. The mandrel 7 is passed through the through holes 10 and 11 of the first intermediate blade part 5 and the second intermediate blade part 6,
A fit with a gap between the mandrel 7 and the through holes 10 and 11, that is, a clearance fit state.

先端刃部３には先端刃部側連結部４aが設けられている。また、心棒７には心棒側連結
部４bが設けられている。心棒７を第１の中間刃部５、第２の中間刃部６の貫通穴１０、
１１に通した状態で第１の中間刃部５側から先端刃部３に設けられた先端刃部側連結部４
aと心棒側連結部４bとを連結させる。先端刃部側連結部４aはおねじ形状、心棒側連結部
４bはめねじ形状を有し、ねじ止めによって連結される。ねじを締める向きは工具が切削
時に回転する向きと一致させる。このように先端刃部３、第１の中間刃部５、及び第２の
中間刃部６とが、心棒７を介してシャンク２に固定された状態で切削加工をおこなう。 The leading edge part 3 is provided with a leading edge part side connecting part 4a. Further, the mandrel 7 is provided with a mandrel side connecting portion 4b. The mandrel 7 has a first intermediate blade portion 5, a through hole 10 in the second intermediate blade portion 6,
11, the leading edge part side connecting part 4 provided on the leading edge part 3 from the first intermediate blade part 5 side.
a and the mandrel side connection part 4b are connected. The tip blade portion side connecting portion 4a has a male screw shape and a mandrel side connecting portion 4b has a female screw shape, and is connected by screwing. The direction in which the screw is tightened matches the direction in which the tool rotates during cutting. Thus, cutting is performed in a state in which the tip blade portion 3, the first intermediate blade portion 5, and the second intermediate blade portion 6 are fixed to the shank 2 via the mandrel 7.

本発明の第２の実施の形態について図３を用いて説明をする。第１の実施の形態に加え
、第１の中間刃部５と第２の中間刃部６との間、及び第２の中間刃部６とシャンク２との
間に円柱の凹凸形状である嵌め合わせ部材８a、８b、９a、９bを設ける。嵌め合わせ部材
は第１の中間刃部５の合わせ面１１に設けられた凸部９aと第２の中間刃部６の合わせ面
１２に設けられた凹部８aとで対をなし、また第２の中間刃部６の凹部８aとは反対側の合
わせ面１３に設けられた凸部９bと、シャンク２の合わせ面１４に設けられた凹部８bとで
対をなす。嵌め合わせ部材の対を合わせ面に２個づつ設けているが、このように対を複数
設けることで中間刃部が加工中に切削抵抗の作用で円周方向にずれることを防ぐことがで
きる。 A second embodiment of the present invention will be described with reference to FIG. In addition to the first embodiment, a cylindrical concave-convex fit is provided between the first intermediate blade portion 5 and the second intermediate blade portion 6 and between the second intermediate blade portion 6 and the shank 2. Matching members 8a, 8b, 9a, 9b are provided. The fitting members are paired with a convex portion 9 a provided on the mating surface 11 of the first intermediate blade portion 5 and a concave portion 8 a provided on the mating surface 12 of the second intermediate blade portion 6. The convex portion 9b provided on the mating surface 13 opposite to the concave portion 8a of the intermediate blade portion 6 and the concave portion 8b provided on the mating surface 14 of the shank 2 make a pair. Two pairs of fitting members are provided on the mating surfaces, but by providing a plurality of pairs in this way, it is possible to prevent the intermediate blade portion from being displaced in the circumferential direction by the action of cutting resistance during machining.

これらの凸部と凹部とは逆に設けてもよい。また、本実施例の図３では凹部、凸部の形
状は円柱形状でそれぞれ２個づつ設けられているが、嵌め合わせができれば嵌め合わせ部
材の形状や嵌め合わせ部材の個数は問わない。例えば、角柱、円錐、角錐やこれらの組み
合わせでも良い。 These convex portions and concave portions may be provided in reverse. Further, in FIG. 3 of the present embodiment, the recesses and the projections are cylindrical in shape, and two each are provided. However, the shape of the fitting member and the number of the fitting members are not limited as long as the fitting is possible. For example, a prism, a cone, a pyramid, or a combination thereof may be used.

本発明の第３の実施の形態について図４を用いて説明をする。図４は中間刃部の合わせ
面での断面図である。第２の実施の形態での凹部８a、凹部８bを凹部８cに代える形で、
合わせ面１２，１４に凹部８cを工具の回転軸を中心に複数配列する。このときに配列に
は一定の角度ピッチをもたせる。こうすることで、中間刃部同士及び、中間刃部と先端刃
部との外周刃の角度を変えることができる。このように外周刃同士に角度を有するように
設けたり、角度を調整することで工具の回転切削中に発生する自励振動を抑制でき、安定
した加工状態が得られる。つまり、凹部を凸部よりも多く設けることで、凹部と凸部との
嵌め合わせ時の組み合わせの選択肢を増やすことができる。これにより、各刃部のユニッ
ト同士の刃部の角度を多様に固定することができる。よって本実施の形態の回転切削工具
は複数の種類の工具を用いる必要がなく、１本で自在に角度を調整することができる。 A third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view of the mating surface of the intermediate blade portion. In the form of replacing the recesses 8a and 8b in the second embodiment with the recesses 8c,
A plurality of recesses 8c are arranged on the mating surfaces 12, 14 around the rotation axis of the tool. At this time, the array is given a certain angular pitch. By doing so, the angles of the peripheral blades between the intermediate blade portions and between the intermediate blade portion and the tip blade portion can be changed. Thus, by providing the outer peripheral blades with an angle or adjusting the angle, the self-excited vibration generated during the rotary cutting of the tool can be suppressed, and a stable machining state can be obtained. That is, by providing more concave portions than the convex portions, it is possible to increase the choices of combinations when fitting the concave portions and the convex portions. Thereby, the angle of the blade part between the units of each blade part can be variously fixed. Therefore, the rotary cutting tool of the present embodiment does not need to use a plurality of types of tools, and the angle can be adjusted freely with a single tool.

本発明の第４の実施の形態について図５を用いて説明をする。心棒１７を先刃部３の取
り付け側の端部に向かって徐々に細くなるようにテーパ形状にする。さらに第１の中間刃
部１５に設けられた貫通穴２０、及び第２の中間刃部１６に設けられた貫通穴２１をテー
パ形状にする。テーパ形状は心棒１７と同様に先刃部３の取り付け側の端部に向かって細
くなるように、また貫通穴２０、２１は心棒１７と同様、回転軸と同心になるように設け
る。貫通穴２０、２１とは心棒１７とはテーパ形状の面同士で接触するため、大きな切削
抵抗がかかっても接触抵抗により中間刃部が円周方向にずれにくくなる。また、貫通穴２
０、２１と心棒１７とが接触しているため心棒１７の中心軸と中心刃部との中心軸が一致
し回転工具の外周刃の振れを抑えることが可能となる。 A fourth embodiment of the present invention will be described with reference to FIG. The mandrel 17 is tapered so that it gradually becomes thinner toward the end on the attachment side of the leading edge portion 3. Furthermore, the through hole 20 provided in the first intermediate blade portion 15 and the through hole 21 provided in the second intermediate blade portion 16 are tapered. Like the mandrel 17, the taper shape is narrowed toward the end on the attachment side of the leading edge portion 3, and the through holes 20 and 21 are provided so as to be concentric with the rotating shaft like the mandrel 17. Since the through holes 20 and 21 and the mandrel 17 are in contact with each other in a tapered shape, even if a large cutting resistance is applied, the intermediate cutting portion is not easily displaced in the circumferential direction due to the contact resistance. Also, the through hole 2
Since 0, 21 and the mandrel 17 are in contact with each other, the center axis of the mandrel 17 and the center axis of the central blade portion coincide with each other, and it becomes possible to suppress the deflection of the outer peripheral blade of the rotary tool.

次に工具の材質について図６を用いて述べる。本発明の実施の形態において刃部ごとに
工具材質を変更することができる。例えば、切削速度が小さくなり、かつ折れやすい先刃
部３には靱性の高い材質、一例としてハイスと呼ばれる高速度鋼が挙げられる。また、切
削速度が大きくなる第１、第２の中間刃部２５，２６には摩耗性に優れた材質、例えば一
例として超硬合金が挙げられる。 Next, the material of the tool will be described with reference to FIG. In the embodiment of the present invention, the tool material can be changed for each blade portion. For example, the cutting edge has a low cutting speed and is easy to break. For example, high-speed steel called high-speed steel can be cited as a material having high toughness. In addition, the first and second intermediate blade portions 25 and 26 that increase the cutting speed may be made of a material excellent in wear, for example, a cemented carbide.

クリスマスカッタは形状の特性から工具径が軸の位置によって異なる。そのため、ある
回転数で工具を回転すると径が大きい部分では切削速度が速くなり、小さい部分では切削
速度が遅くなる。よって一本の工具で複数の切削条件が存在するため、従来の工具では溝
全体を適切な条件で加工することが難しい一方、刃部ごとに材質の異なる工具を使用する
ことで加工条件を調整できる本実施の形態は有効である。 In the Christmas cutter, the tool diameter varies depending on the position of the shaft due to the characteristics of the shape. Therefore, when the tool is rotated at a certain number of revolutions, the cutting speed increases at a portion where the diameter is large, and the cutting speed decreases at a portion where the diameter is small. Therefore, since multiple cutting conditions exist with a single tool, it is difficult to process the entire groove under appropriate conditions with a conventional tool, but the processing conditions can be adjusted by using tools with different materials for each blade. This embodiment that is possible is effective.

次に工具の形状についての例を図７を用いて述べる。本発明の実施の形態において刃部
ごとに切刃形状を変更することができる。その結果、一例として以下の効果を得ることが
できる。例えば削り取る量が多く切削抵抗がかかるシャンク２側の第２の中間刃部３６の
切部形状をニック切刃にすることができ抵抗を抑えることができる。また、図示は省略す
るが切削抵抗が局所的に大きくなった場合には刃部のすくい角が大きくなるように先端刃
部、第１の中間刃部、第２の中間刃部のすくい面のそれぞれ、あるいはいずれかの角度を
変更した刃を取り付けをすることで切れを良くし切削抵抗を抑えることができる。さらに
、先端刃部、第１の中間刃部、第２の中間刃部のそれぞれの刃数を部分的に変更すること
もできる。 Next, an example of the shape of the tool will be described with reference to FIG. In the embodiment of the present invention, the cutting edge shape can be changed for each blade portion. As a result, the following effects can be obtained as an example. For example, the shape of the second intermediate blade portion 36 on the shank 2 side where the amount to be scraped is large and the cutting resistance is applied can be a nick cutting blade, and the resistance can be suppressed. Although illustration is omitted, when the cutting resistance is locally increased, the rake face of the tip edge part, the first intermediate blade part, and the second intermediate blade part is set so that the rake angle of the blade part is increased. By attaching a blade with each or any angle changed, cutting can be improved and cutting resistance can be suppressed. Furthermore, the number of blades of the tip blade portion, the first intermediate blade portion, and the second intermediate blade portion can be partially changed.

以上、本発明の実施の形態について例示をした。しかし、本発明はこれらの記述に限定
されるものではない。 The embodiment of the present invention has been illustrated above. However, the present invention is not limited to these descriptions.

前述の実施の形態に関して、当業者が適宜設計変更を加えたものも、本発明の特徴を備
えている限り、本発明の範囲に包含される。 As long as the features of the present invention are provided, those skilled in the art appropriately modified the design of the above-described embodiments are also included in the scope of the present invention.

例えば、中間刃部は第１の中間刃部５及び第２の中間刃部６の２つとしているがこれは
一例にすぎず、中間刃部の数は適宜変更することができる。 For example, although there are two intermediate blade portions, the first intermediate blade portion 5 and the second intermediate blade portion 6, this is only an example, and the number of intermediate blade portions can be changed as appropriate.

また、前述した各実施の形態が備える各要素は、可能な限りにおいて組み合わせること
ができ、これらを組み合わせたものも本発明の特徴を含む限り本発明の範囲に包含される
。 Moreover, each element with which each embodiment mentioned above is combined can be combined as much as possible, and what combined these is also included in the scope of the present invention as long as the characteristics of the present invention are included.

１ 刃部、２ シャンク、３ 先端刃部、４a 先端刃部側連結部、４ｂ 心棒側連
結部、７ 心棒、８ 周縁部、８ａ,b,c 凹部、９a,ｂ 凸部、１３ 芯体、１０,１１,
２０,２１ 貫通穴 1 blade part, 2 shank, 3 tip blade part, 4a tip blade part side connection part, 4b mandrel side connection part, 7 mandrel, 8 peripheral part, 8a, b, c concave part, 9a, b convex part, 13 core, 10, 11,
20,21 Through hole

Claims (11)

刃部の外周の刃先径が工具の回転軸の長手方向における先端部へ向かうに従って、増減し
ながら徐々に小さくなり、加工溝を有する回転切削工具において、
前記切部を支持し回転軸となる心棒と、
前記心棒を前記刃部の先端部側とは反対側の端部で支持する工具支持部材と、
前記刃部は先端部ユニットを含む複数の刃部ユニットからなることを特徴とする回転切削
工具。 As the cutting edge diameter of the outer periphery of the blade portion goes toward the tip in the longitudinal direction of the rotation axis of the tool, it gradually decreases while increasing or decreasing,
A mandrel that supports the cut and serves as a rotating shaft;
A tool support member that supports the mandrel at the end opposite to the tip side of the blade,
The blade part is composed of a plurality of blade unit units including a tip part unit. 前記刃部は前記回転切削工具の回転軸と交わる面で分割されることを特徴とする請求項１
記載の回転切削工具。 The said blade part is divided | segmented by the surface which cross | intersects the rotating shaft of the said rotary cutting tool.
The described rotary cutting tool. 前記回転切削工具の回転軸と交わる面は前記回転切削工具の回転軸の長手方向に対して垂
直であることを特徴とする請求項１記載の回転切削工具。 2. The rotary cutting tool according to claim 1, wherein a surface intersecting with a rotation axis of the rotary cutting tool is perpendicular to a longitudinal direction of the rotation axis of the rotary cutting tool. 前記刃部ユニットのうち前記先端部ユニットと、前記心棒の先端部とは互いに連結可能な
連結部を有することを特徴とする請求項１記載の回転切削工具。 The rotary cutting tool according to claim 1, wherein the tip unit and the tip of the mandrel of the blade unit have a connecting part that can be connected to each other. 前記刃部ユニット同士、もしくは刃部ユニットと前記工具支持部材との間の面には凹凸形
状からなる嵌め合わせ部材を有することを特徴とする請求項１記載の回転切削工具。 The rotary cutting tool according to claim 1, further comprising a fitting member having a concavo-convex shape on a surface between the blade unit units or between the blade unit and the tool support member. 前記嵌め合わせ部材は凸部より凹部のほうが数が多いことを特徴とする請求項５記載の回
転切削工具。 6. The rotary cutting tool according to claim 5, wherein the fitting member has more concave portions than convex portions. 前記心棒の外径は一定であることを特徴とする請求項１記載の回転切削工具。 The rotary cutting tool according to claim 1, wherein an outer diameter of the mandrel is constant. 前記刃部ユニットのうち前記先端部ユニット以外の刃部ユニットには貫通穴を有し、前記
貫通穴は一定の径であり、前記心棒と嵌め合わせると隙間を有することを特徴とする請求
項７記載の回転切削工具。 The blade unit other than the tip unit in the blade unit has a through hole, the through hole has a constant diameter, and has a gap when fitted to the mandrel. The described rotary cutting tool. 前記心棒の外径は前記工具の先端部に向かって徐々に細くなるテーパ形状であることを特
徴とする請求項１記載の回転切削工具。 The rotary cutting tool according to claim 1, wherein the outer diameter of the mandrel is a tapered shape that gradually decreases toward the tip of the tool. 前記刃部ユニットのうち前記先端部ユニット以外の刃部ユニットには貫通穴を有し、前記
貫通穴はテーパ形状であり、前記心棒と嵌め合わせるとテーパ面同士で接触することを特
徴とを特徴とする請求項９記載の回転切削工具。 Of the blade unit, blade units other than the tip unit have a through hole, and the through hole has a tapered shape, and when fitted with the mandrel, the tapered surfaces come into contact with each other. The rotary cutting tool according to claim 9. 前記刃部ユニットにおいて、一部の刃部ユニットをニック切れ刃にする、もしくは一部の
刃部ユニットを他の刃部ユニットとは刃数の異なる切れ刃にすることを特徴とする請求項
９記載の回転切削工具。 10. The blade unit according to claim 9, wherein a part of the blade unit is a nick cutting blade, or a part of the blade unit is a cutting blade having a different number of blades from other blade units. The described rotary cutting tool.
JP2009061715A 2009-03-13 2009-03-13 Rotary cutting tool Pending JP2010214489A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009061715A JP2010214489A (en) 2009-03-13 2009-03-13 Rotary cutting tool

Publications (1)

Publication Number Publication Date
JP2010214489A true JP2010214489A (en) 2010-09-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150360303A1 (en) * 2013-02-28 2015-12-17 Mitsubishi Heavy Industries, Ltd. Forming rotary cutting tool
US11583941B2 (en) 2020-11-27 2023-02-21 Hsin-Tien Chang Assembled chamfer mill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150360303A1 (en) * 2013-02-28 2015-12-17 Mitsubishi Heavy Industries, Ltd. Forming rotary cutting tool
US11583941B2 (en) 2020-11-27 2023-02-21 Hsin-Tien Chang Assembled chamfer mill

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