JP2005034976A - Cutting tool - Google Patents

Cutting tool Download PDF

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JP2005034976A
JP2005034976A JP2003277035A JP2003277035A JP2005034976A JP 2005034976 A JP2005034976 A JP 2005034976A JP 2003277035 A JP2003277035 A JP 2003277035A JP 2003277035 A JP2003277035 A JP 2003277035A JP 2005034976 A JP2005034976 A JP 2005034976A
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blade
blade portion
cutting
shank
cutting tool
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JP4435513B2 (en
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Shunsuke Wakaoka
俊介 若岡
Takao Hasebe
孝男 長谷部
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Okuma Corp
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Okuma Corp
Okuma Machinery Works Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/28—Features relating to lubricating or cooling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting tool which can efficiently feed fluid to a blade portion even if it has only a very small diameter. <P>SOLUTION: According to the structure of the cutting tool, a shank portion 3 has four cutting fluid channels 7 bored therein in a manner penetrating from a rear end face 6 to a front end face 4. The cutting fluid channels 7 are all formed in parallel with a central axis of the shank portion 3. Then front-side openings 8 of the respective cutting fluid channels 7 are formed in the front end face 4 of the shank portion 3 at locations that make contact with a circumference of a proximal end (a portion making contact with the front end face 4 of the shank portion 3) of the blade portion 2 in a manner being separated at equal intervals. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、フライス盤、マシニングセンタ、複合加工施盤等の工作機械において用いられる切削工具に関するものである。   The present invention relates to a cutting tool used in a machine tool such as a milling machine, a machining center, or a combined machining lathe.

従来より、フライス盤等でエンドミル等の回転切削工具を用いて工作物を加工する際には、切削工具の刃部に切削油等の切削液を供給するのが一般的である。
しかしながら、近年では、切削速度の上昇に伴う切削工具の回転速度の高速化や、複雑な形状への加工の要求とそれに伴う刃部の複雑化によって、刃部の切削点への切削液の供給が困難になってきている。 Conventionally, when a workpiece is machined using a rotary cutting tool such as an end mill on a milling machine or the like, a cutting fluid such as cutting oil is generally supplied to the blade portion of the cutting tool.
However, in recent years, the cutting fluid has been supplied to the cutting point of the blade due to the increase in the rotational speed of the cutting tool accompanying the increase in the cutting speed, the demand for machining into a complicated shape and the accompanying complexity of the blade. Has become difficult.

そこで、この問題点を解決するために、特許文献１に開示されているような、切削工具内の全長に亘って流路を穿設することで刃部の先端から切削液を切削点に供給可能とした工具が考案されている。
また、特許文献２には、側面に供給溝を設けられた切削工具や、工具ホルダ内で切削工具を保持するコレットの隙間を通して切削液を供給する構成等が開示されている。 Therefore, in order to solve this problem, the cutting fluid is supplied to the cutting point from the tip of the blade portion by drilling the flow path over the entire length in the cutting tool as disclosed in Patent Document 1. A tool that makes it possible has been devised.
Patent Document 2 discloses a configuration in which cutting fluid is provided through a side surface provided with a supply groove, or a cutting fluid is supplied through a gap of a collet that holds the cutting tool in the tool holder.

さらに、特許文献３には、切削工具と工具ホルダとの間に切削液のための流路を設ける構成や、切削工具内に流路を穿設し、その刃部側先端を二股として刃部に切削液を直接供給可能とした切削工具等が開示されている。
さらにまた、特許文献４には、内面に溝を有するスリーブを切削工具の外周に嵌合させて、この溝を切削液の流路とする構成が開示されている。これは、特許文献１や特許文献２に記載されたような、工具自身に孔加工や溝加工を行うことなく特許文献１等と同様の効果を得ようとするものである。 Furthermore, Patent Document 3 discloses a configuration in which a flow path for cutting fluid is provided between a cutting tool and a tool holder, or a flow path is formed in the cutting tool, and the blade portion side tip is bifurcated. Discloses a cutting tool that can directly supply a cutting fluid.
Furthermore, Patent Document 4 discloses a configuration in which a sleeve having a groove on the inner surface is fitted to the outer periphery of a cutting tool and the groove is used as a flow path for the cutting fluid. This is to obtain the same effect as Patent Document 1 and the like without performing drilling or grooving on the tool itself as described in Patent Document 1 and Patent Document 2.

実開平７−１７４１１号公報Japanese Utility Model Publication No. 7-17411 特許第２８９４９２４号公報Japanese Patent No. 2894924 特開２００２−２２４９３０号公報JP 2002-224930 A 実用新案登録第２５１１０６５号公報Utility Model Registration No. 2511065

ところで、近年では、複雑な形状への加工や、小さな工作物の高速加工等の要求から、工具径の小さな切削工具が重用されるようになってきており、要求される加工の内容によっては、刃部の外径が１ｍｍ未満となることも少なくない。したがって、特許文献１、２及び３に記載されているような刃部にまで亘る流路を設けられた切削工具は、製作するにあたって困難を極める。加えて、刃部に流路の開口部を設けると刃部を研磨することができないという問題点もある。さらに、流路が小径になりすぎるため、流路が詰まりやすい上、十分な量の切削液を供給することができないという問題点もある。
また、刃部の非常に細い切削工具には、工具自体の剛性確保や扱いやすさを目的として、図３に示されているように、刃部に比べ太いシャンク部３３を設けており、シャンク部３３を工具ホルダ３９に把持させるようになっている。したがって、特許文献２及び３に開示されているように切削工具３１のシャンク部３３と工具ホルダ３９との間に切削液流路３７を設けたのでは、シャンク部３３の先端部で切削液が遠心力や重力等により飛散してしまい、刃部３２へと効果的に供給することはできない。
さらに、特許文献４に開示されているようなスリーブを設けると、スリーブが加工時に邪魔となったり、加工により排出される粉塵等がスリーブの溝に詰まってしまい切削工具が回転できなくなる等の故障の原因となるなどの問題点があった。
さらにまた、特許文献４に開示されているようなスリーブを、図３に示した従来の工具に使用しても、シャンク部が刃部よりも大径に形成されているので、やはり図３に示した従来技術と同様の課題が生じる。刃部の外径をシャンク部と同径に形成し、これにスリーブを固着する方法も考えられるが、刃部の外径が１ｍｍに満たないような工具の場合には、スリーブを圧嵌するのは強度面から見て困難である他、接着の場合にはホルダに把持されるスリーブの外周と、刃部の中心とを一致させることが難しいという課題が予想される。 By the way, in recent years, cutting tools with a small tool diameter have come to be heavily used due to demands for processing to complex shapes, high speed processing of small workpieces, etc. The outer diameter of the blade part is often less than 1 mm. Therefore, the cutting tool provided with the flow path extending to the blade portion as described in Patent Documents 1, 2, and 3 is extremely difficult to manufacture. In addition, if the opening of the flow path is provided in the blade, there is also a problem that the blade cannot be polished. Furthermore, since the flow path becomes too small, the flow path is easily clogged and a sufficient amount of cutting fluid cannot be supplied.
Further, as shown in FIG. 3, the cutting tool having a very thin blade portion is provided with a shank portion 33 that is thicker than the blade portion for the purpose of ensuring rigidity and ease of handling of the tool itself. The part 33 is gripped by the tool holder 39. Therefore, when the cutting fluid channel 37 is provided between the shank portion 33 of the cutting tool 31 and the tool holder 39 as disclosed in Patent Documents 2 and 3, the cutting fluid is generated at the tip of the shank portion 33. It is scattered by centrifugal force, gravity, etc., and cannot be effectively supplied to the blade part 32.
Furthermore, when a sleeve as disclosed in Patent Document 4 is provided, the sleeve becomes an obstacle during processing, or the dust discharged by the processing is clogged in the groove of the sleeve and the cutting tool cannot be rotated. There was a problem such as causing.
Furthermore, even if a sleeve as disclosed in Patent Document 4 is used in the conventional tool shown in FIG. 3, the shank portion is formed to have a larger diameter than the blade portion. The same problem as the conventional technique shown arises. A method of forming the outer diameter of the blade portion to be the same as the shank portion and fixing the sleeve to the shank portion is also conceivable. However, in the case of a tool whose outer diameter is less than 1 mm, the sleeve is press-fit. This is difficult from the viewpoint of strength, and in the case of bonding, it is expected that it is difficult to match the outer periphery of the sleeve held by the holder with the center of the blade portion.

そこで、本発明は上記したような課題に鑑みなされたものであって、刃部が非常に小径であったとしても、刃部に切削液等の流体を効率よく供給可能な切削工具を提供しようとするものである。   Accordingly, the present invention has been made in view of the above-described problems, and it is desirable to provide a cutting tool that can efficiently supply a fluid such as a cutting fluid to the blade portion even if the blade portion has a very small diameter. It is what.

上記目的を達成するために、請求項１に記載の発明は、刃部と、刃部より大径に形成されたシャンク部とを同軸上に有する切削工具であって、シャンク部には、シャンク部の全長に亘って、流体を刃部へと供給するための流路を少なくとも１本穿設するとともに、その流路の刃部側の開口部を、シャンク部における刃部側の端面上であって、刃部の基端部外周に接する位置又はその近傍に設けたことを特徴とするものである。
また、請求項２に記載の発明は、請求項１の目的に加えて、よりスムーズに流体を刃部へと導くために、流路を、刃部側へいくにしたがってシャンク部及び刃部の軸に近づく傾斜状に形成したことを特徴とするものである。
さらに、請求項３に記載の発明は、請求項１または２の目的に加えて、切削工具の実用性をより高いものとするために、シャンク部における刃部側の端面を、刃部側が小径となるテーパ状に形成したことを特徴とするものである。 In order to achieve the above object, an invention according to claim 1 is a cutting tool having a blade portion and a shank portion having a diameter larger than that of the blade portion, and the shank portion includes a shank portion. At least one flow channel for supplying fluid to the blade portion is drilled over the entire length of the portion, and the opening portion on the blade portion side of the flow channel is formed on the end surface of the shank portion on the blade portion side. It is characterized in that it is provided at a position in contact with the outer periphery of the base end portion of the blade portion or in the vicinity thereof.
Further, in addition to the object of the first aspect, the invention according to the second aspect provides the shank portion and the blade portion of the shank portion and the blade portion as the flow path is moved toward the blade portion in order to more smoothly guide the fluid to the blade portion. It is characterized by being formed in an inclined shape approaching the axis.
Furthermore, in addition to the object of the first or second aspect, the invention described in claim 3 has an end face on the blade portion side in the shank portion, and the blade portion side has a small diameter in order to make the cutting tool more practical. It is characterized by being formed into a tapered shape.

本発明によれば、刃部がシャンク部に比べて小径に形成されているにもかかわらず、流体は刃部の基端部外周に沿って形成された開口部から吐出されるため、刃部の内部に流路を設けることができないような刃部の外径が小さい工具であっても、流体をシャンク部の端部等で飛散させることなく、効率よく供給することが可能である。また、小径の刃部の基端部外周に接する位置或いはその近傍に開口部が設けられているため、吐出された流体にかかる遠心力の影響も小さく抑えることができ、より飛散させることなく流体を供給することができる。さらに、流路を穿設するのは大径なシャンク部であるため製作が容易である。加えて、流路も比較的大径に形成可能であるため、流路が詰まる心配はない上、十分な量の流体を刃部に供給することができる。
また、刃部に流路の開口部を設けてはいないため、刃部が摩耗した場合には刃部を研磨することも可能である。加えて、加工時に発生する粉塵等により流路が詰まる心配もない。さらに、シャンク部の内部に流路を設けたため、流路が加工時に邪魔となることもない。
また、特に請求項２の発明とすれば、流体をよりスムーズに刃部の切削点へと導くことが可能となる。さらに、切削工具が高速回転している場合では、流体にかかる遠心力の影響をより小さくすることができる。
加えて、請求項３の発明とすれば、シャンク部の先端側にテーパ部が形成されているため、加工時に切削工具と工作物とが干渉しにくくなり、より実用性を高めることができる。
According to the present invention, the fluid is discharged from the opening formed along the outer periphery of the base end portion of the blade portion even though the blade portion is formed with a smaller diameter than the shank portion. Even a tool having a small outer diameter of the blade portion in which a flow path cannot be provided inside can be efficiently supplied without being scattered at the end of the shank portion or the like. Further, since the opening is provided at or near the outer periphery of the proximal end of the small-diameter blade, the influence of the centrifugal force on the discharged fluid can be suppressed to a small level, and the fluid can be dispersed without being scattered. Can be supplied. Further, the passage is easily drilled because it is a large-diameter shank part. In addition, since the flow path can also be formed with a relatively large diameter, there is no fear of clogging the flow path, and a sufficient amount of fluid can be supplied to the blade portion.
Moreover, since the opening part of the flow path is not provided in the blade part, the blade part can be polished when the blade part is worn. In addition, there is no fear of clogging the flow path due to dust generated during processing. Furthermore, since the flow path is provided inside the shank portion, the flow path does not interfere with processing.
In particular, if the invention of claim 2 is used, the fluid can be more smoothly guided to the cutting point of the blade portion. Furthermore, when the cutting tool is rotating at high speed, the influence of centrifugal force on the fluid can be further reduced.
In addition, according to the invention of claim 3, since the taper portion is formed on the tip side of the shank portion, it becomes difficult for the cutting tool and the workpiece to interfere with each other during processing, and the practicality can be further improved.

以下、本発明の第１の実施例であるエンドミル１について図面に基づき説明する。図１（ａ）はエンドミル１の説明図であり、また図１（ｂ）はエンドミル１の刃部２の先端側から見た説明図である。
エンドミル１は、略円筒状であって例えば直径３ｍｍのシャンク部３と、シャンク部３の先端側（以下、刃部２側を先端側とする）端面４に突設された例えば直径０．６ｍｍの刃部２とからなっている。刃部２は、その中心軸とシャンク部３との中心軸が同軸となるようにシャンク部３に設けられており、刃部２の外周面には切削加工するための切削溝５が螺旋状に形成されている。 Hereinafter, the end mill 1 which is the 1st example of the present invention is explained based on a drawing. FIG. 1A is an explanatory diagram of the end mill 1, and FIG. 1B is an explanatory diagram viewed from the tip side of the blade portion 2 of the end mill 1.
The end mill 1 has a substantially cylindrical shape, for example, a shank portion 3 having a diameter of 3 mm, and a tip end side 4 of the shank portion 3 (hereinafter, the blade portion 2 side is referred to as a tip side), for example, having a diameter of 0.6 mm. The blade part 2 is composed. The blade part 2 is provided in the shank part 3 so that the central axis of the center axis | shaft and the shank part 3 become coaxial, and the cutting groove 5 for cutting on the outer peripheral surface of the blade part 2 is helical. Is formed.

一方、シャンク部３には、その後端側端面６から先端側端面４にかけて貫通した４本の流路である切削液流路７、７・・が穿設されている。切削液流路７、７・・は全て、シャンク部３の中心軸と平行に形成されている。また、切削液流路７、７・・の先端側開口部８、８・・は、シャンク部３の先端側端面４上であって、刃部２の基端部（シャンク部３の先端側端面４と接している部分）外周に接する位置に等間隔に設けられている。   On the other hand, the shank portion 3 is provided with cutting fluid passages 7, 7... That are four passages penetrating from the rear end side end face 6 to the front end side end face 4. All of the cutting fluid flow paths 7, 7... Are formed in parallel with the central axis of the shank portion 3. Moreover, the front end side openings 8, 8,... Of the cutting fluid passages 7, 7,... Are on the front end side end face 4 of the shank portion 3, and are the base end portion of the blade portion 2 (the front end side of the shank portion 3). The portion in contact with the end face 4) is provided at equal intervals at a position in contact with the outer periphery.

このように形成されたエンドミル１は、シャンク部３をフライス盤等の工作機械の工具ホルダ９に把持させた状態で使用される。そして、工作機械から工具ホルダ９を介して切削液流路７、７・・に流体として例えば切削液を注入すると、刃部２の基端部外周に接する位置に形成された先端側開口部８、８・・から切削液は吐出され、刃部２の切削点へと供給される。   The end mill 1 thus formed is used in a state where the shank portion 3 is held by a tool holder 9 of a machine tool such as a milling machine. Then, when, for example, cutting fluid is injected as fluid from the machine tool into the cutting fluid flow path 7, 7..., The distal end side opening 8 formed at a position in contact with the outer periphery of the base end of the blade portion 2. , 8... Are discharged from the cutting fluid and supplied to the cutting point of the blade portion 2.

したがって、エンドミル１を用いると、シャンク部３と比べて非常に小径な刃部２を有しているにもかかわらず、切削液は刃部の基端部外周に接する位置に形成された先端側開口部８、８・・から吐出されるため、切削液をシャンク部３の端部等で飛散させることなく、効率よく切削点に供給することが可能である。また、径の小さい刃部２の外周に接するように先端側開口部８、８・・が設けられているため、吐出された切削液にかかる遠心力の影響も小さく抑えることができ、より飛散させることなく供給することができる。さらに、切削液流路７、７・・を穿設するのは大径なシャンク部３であるため製作が容易である。加えて、切削液流路７、７・・も比較的大径に形成可能であるため、切削液流路７、７・・が詰まる心配はない上、十分な量の切削液を供給することができる。   Therefore, when the end mill 1 is used, the cutting fluid is formed at a position in contact with the outer periphery of the base end portion of the blade portion even though the blade portion 2 has a very small diameter as compared with the shank portion 3. Since the liquid is discharged from the openings 8, 8,..., The cutting fluid can be efficiently supplied to the cutting point without being scattered at the end of the shank portion 3 or the like. Further, since the front end side openings 8, 8,... Are provided so as to be in contact with the outer periphery of the blade portion 2 having a small diameter, the influence of the centrifugal force applied to the discharged cutting fluid can be suppressed to a small extent, and more scattering It is possible to supply without letting. Further, the cutting fluid passages 7, 7... Are easily manufactured because the large-diameter shank portion 3 is drilled. In addition, since the cutting fluid flow paths 7, 7,... Can be formed with a relatively large diameter, there is no fear of the cutting fluid flow paths 7, 7, .. being clogged, and a sufficient amount of cutting fluid is supplied. Can do.

また、刃部２に切削液流路７、７・・の先端側開口部８、８・・を設けてはいないため、刃部２が摩耗した場合には刃部２を研磨することも可能である。加えて、切削点により発生する粉塵等により切削液流路７、７・・が詰まる心配もない。さらに、シャンク部３の内部に切削液流路７、７・・を設けたため、切削液流路７、７・・が加工時に邪魔となることもない。   In addition, since the cutting edge 2 is not provided with the cutting fluid passages 7, 7,..., The blade 2 can be polished when the blade 2 is worn. It is. In addition, there is no fear that the cutting fluid channels 7, 7,... Furthermore, since the cutting fluid channels 7, 7,... Are provided inside the shank portion 3, the cutting fluid channels 7, 7,.

次に、本発明の第２の実施例であるエンドミル２１について図面に基づき説明する。図２（ａ）はエンドミル２１の説明図であり、また図２（ｂ）はエンドミル２１の刃部２２の先端側から見た説明図である。   Next, an end mill 21 according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 2A is an explanatory diagram of the end mill 21, and FIG. 2B is an explanatory diagram viewed from the tip side of the blade portion 22 of the end mill 21.

エンドミル２１は、上述した第１の実施例のエンドミル１と略同様の構成を備えており、先端側（以下、刃部２２側を先端側とする）に徐々に小径となるテーパ部２４を設けた直径３ｍｍのシャンク部２３と、テーパ部２４の先端側から突設された直径０．６ｍｍの刃部２２とからなっている。刃部２２は、上述した第１の実施例の刃部２と同様の構成となっている。   The end mill 21 has substantially the same configuration as the end mill 1 of the first embodiment described above, and is provided with a tapered portion 24 that gradually decreases in diameter on the distal end side (hereinafter referred to as the blade portion 22 side). The shank portion 23 having a diameter of 3 mm and the blade portion 22 having a diameter of 0.6 mm projecting from the tip side of the taper portion 24 are formed. The blade part 22 has the same configuration as the blade part 2 of the first embodiment described above.

一方、シャンク部２３には、その後端側端面２６からテーパ部２４にかけて貫通した４本の流路である切削液流路２７、２７・・が穿設されている。切削液流路２７、２７・・は全て、刃部側へいくにしたがってシャンク部２３及び刃部２２の軸に近づく傾斜状に形成されている。また、切削液流路２７、２７・・の先端側開口部２８、２８・・は、テーパ部２４上であって、刃部２２の基端部（テーパ部２４と刃部２２とが接している部分）外周に接する位置に等間隔に設けられている。   On the other hand, the cutting fluid passages 27, 27... That are four passages penetrating from the rear end face 26 to the taper portion 24 are formed in the shank portion 23. All of the cutting fluid flow paths 27, 27,... Are inclined so as to approach the shafts of the shank part 23 and the blade part 22 as they go to the blade part side. Further, the distal end side openings 28, 28,... Of the cutting fluid channels 27, 27,... Are on the taper portion 24, and the base end portion of the blade portion 22 (the taper portion 24 and the blade portion 22 are in contact with each other). Are provided at equal intervals at positions in contact with the outer periphery.

このように形成されたエンドミル２１は、シャンク部２３をフライス盤等の工作機械の工具ホルダ２９に把持させた状態で使用される。そして、工具ホルダ２９を介して切削液流路２７、２７・・に流体として例えば切削液を注入すると、刃部２２の基端部外周に接する位置に形成された先端側開口部２８、２８・・から切削液は吐出され、刃部２２の切削点へと供給される。   The end mill 21 thus formed is used in a state where the shank portion 23 is held by a tool holder 29 of a machine tool such as a milling machine. Then, when, for example, cutting fluid is injected as fluid into the cutting fluid flow paths 27, 27,... Via the tool holder 29, distal end side openings 28, 28, formed at positions that contact the outer periphery of the base end of the blade portion 22. The cutting fluid is discharged from and supplied to the cutting point of the blade 22.

したがって、エンドミル２１を用いると、第１の実施例のエンドミル１が奏する効果に加えて、切削液流路２７、２７・・が刃部へいくにしたがってシャンク部２３及び刃部２２の軸に近づく傾斜状に形成されているため、切削液をよりスムーズに切削点へと導くことが可能である。特に、エンドミル２１が高速回転している場合では、切削液にかかる遠心力の影響をより小さくすることができる。また、シャンク部２３の先端側に刃部側が小径となるテーパ部２４が形成されているため、加工時にエンドミル２１と工作物とが干渉しにくくなり、より実用性を高めることができる。   Therefore, when the end mill 21 is used, in addition to the effect exhibited by the end mill 1 of the first embodiment, the cutting fluid flow paths 27, 27,.. Since it is formed in an inclined shape, it is possible to guide the cutting fluid to the cutting point more smoothly. In particular, when the end mill 21 rotates at a high speed, the influence of the centrifugal force applied to the cutting fluid can be further reduced. Moreover, since the taper part 24 whose blade part side has a small diameter is formed on the tip side of the shank part 23, the end mill 21 and the workpiece are less likely to interfere with each other at the time of processing, and the practicality can be further improved.

なお、本発明にかかる切削工具の構成は、上記した２つの実施例の態様に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲で適宜変更することができる。
例えば、実施例では切削工具として刃部に切削溝を有する円筒状のエンドミルを採用したが、先端に球状のボールを有するボールエンドミル、ドリル、ボーリング工具等の回転切削工具であっても何ら問題はない。また、それらの回転切削工具と旋削加工用工具とを組み合わせた複合工具であっても当然よい。加えて、シャフト部及び刃部の径は必要に応じて適宜変更可能である。 In addition, the structure of the cutting tool concerning this invention is not limited to the aspect of above-mentioned two Examples at all, It can change suitably in the range which does not deviate from the meaning of this invention.
For example, in the embodiment, a cylindrical end mill having a cutting groove in the blade portion is adopted as a cutting tool, but there is no problem even with a rotary cutting tool such as a ball end mill having a spherical ball at the tip, a drill, or a boring tool. Absent. Of course, a composite tool in which these rotary cutting tools and turning tools are combined may be used. In addition, the diameters of the shaft portion and the blade portion can be appropriately changed as necessary.

また、第１の実施例のようなテーパ部を備えていないシャフト部であっても、傾斜した流路とすることは可能であるし、テーパ部を備えたシャフト部に第１の実施例のようなシャフト部の中心軸と平行な流路を設けても何ら問題はない。さらに、流路の数は４本に限定されることはなく、４本以下でも４本以上であってもよい。加えて、記実施例では、流路の先端側開口部を刃部の基端部外周に接した位置に設けたが、必ずしも基端部外周に接した位置である必要はなく、基端部外周の近傍であってもよい。さらにまた、流路を複数本設ける場合であっても、刃部の基端部外周に等間隔に設ける必要はなく、先端側開口部が刃部の基端部外周に接した位置或いはその近傍であれば、どのような間隔で設けるかは適宜変更可能である。   In addition, even a shaft portion that does not have a tapered portion as in the first embodiment can be formed into an inclined flow path, and the shaft portion that has a tapered portion can be provided with the shaft portion of the first embodiment. There is no problem even if such a flow path parallel to the central axis of the shaft portion is provided. Furthermore, the number of flow paths is not limited to four, and may be four or less or four or more. In addition, in the embodiment, the opening on the distal end side of the flow path is provided at a position in contact with the outer periphery of the base end of the blade portion. It may be in the vicinity of the outer periphery. Furthermore, even when a plurality of flow paths are provided, it is not necessary to provide them at equal intervals on the outer periphery of the base end portion of the blade portion, and the position where the tip side opening is in contact with the outer periphery of the base end portion of the blade portion or its vicinity If so, what interval is provided can be appropriately changed.

さらに、流体は工作機械から工具ホルダを介して供給するものとしたが、その構成に限らず流体供給手段を工作機械とは別に設けてもよい。
加えて、上記実施例においては刃部へと供給する流体を切削液としたが、切削液に限らず、空気や不活性ガス等の気体や、気体と液体とを混合したもの、気体中に微量の液体がミスト状になって混合された状態のもの等を供給するようにしてもよい。 Further, although the fluid is supplied from the machine tool via the tool holder, the fluid supply means may be provided separately from the machine tool without being limited to the configuration.
In addition, in the above embodiment, the fluid supplied to the blade portion is the cutting fluid. However, the fluid is not limited to the cutting fluid, and a gas such as air or inert gas, a mixture of gas and liquid, You may make it supply the thing of the state with which the trace amount liquid became mist form and mixed.

（ａ）はエンドミル１の説明図であり、（ｂ）はエンドミル１の刃部２の先端側から見た説明図である。(A) is explanatory drawing of the end mill 1, (b) is explanatory drawing seen from the front end side of the blade part 2 of the end mill 1. FIG. （ａ）はエンドミル２１の説明図であり、また（ｂ）はエンドミル２１の刃部２２の先端側から見た説明図である。(A) is explanatory drawing of the end mill 21, and (b) is explanatory drawing seen from the front end side of the blade part 22 of the end mill 21. FIG. 従来の切削工具の説明図である。It is explanatory drawing of the conventional cutting tool.

符号の説明Explanation of symbols

１・・エンドミル、２・・刃部、３・・シャンク部、４・・先端側端面、５・・切削溝、６・・後端側端面、７・・切削液流路、８・・先端側開口部、９・・工具ホルダ、２１・・エンドミル、２２・・刃部、２３・・シャンク部、２４・・テーパ部、２６・・後端側端面、２７・・切削液流路、２８・・先端側開口部、２９・・工具ホルダ、３１・・切削工具、３２・・刃部、３３・・シャンク部、３７・・切削液流路、３９・・工具ホルダ。   1 .... End mill, 2 .... Blade, 3 .... Shank, 4 .... End side end face, 5 .... Cutting groove, 6 .... Rear end side end face, 7 .... Cutting fluid flow path, 8 .... End Side opening, 9 ·· Tool holder, 21 ·· End mill, 22 ·· Blade, 23 ·· Shank, 24 ·· Taper, 26 ·· Rear end surface, 27 · Cutting fluid flow path, 28 .. Opening on the tip side, 29... Tool holder, 31... Cutting tool, 32... Blade part, 33.

Claims (3)

刃部と、刃部より大径に形成されたシャンク部とを同軸上に有する切削工具であって、
シャンク部には、シャンク部の全長に亘って、流体を刃部へと供給するための流路を少なくとも１本穿設するとともに、
その流路の刃部側の開口部を、シャンク部における刃部側の端面上であって、刃部の基端部外周に接する位置又はその近傍に設けたことを特徴とする切削工具。 A cutting tool having a blade portion and a shank portion formed larger in diameter than the blade portion on the same axis,
The shank part is provided with at least one channel for supplying fluid to the blade part over the entire length of the shank part, and
A cutting tool characterized in that an opening on the blade portion side of the flow path is provided on a blade portion side end face of the shank portion and at or near a position in contact with the outer periphery of the base end portion of the blade portion. 流路を、刃部側へいくにしたがってシャンク部及び刃部の軸に近づく傾斜状に形成したことを特徴とする請求項１に記載の切削工具。   2. The cutting tool according to claim 1, wherein the flow path is formed in an inclined shape that approaches the shank portion and the axis of the blade portion as it goes to the blade portion side. シャンク部における刃部側の端面を、刃部側が小径となるテーパ状に形成したことを特徴とする請求項１または２に記載の切削工具。   The cutting tool according to claim 1 or 2, wherein an end surface of the shank portion on the blade portion side is formed in a taper shape having a small diameter on the blade portion side.
JP2003277035A 2003-07-18 2003-07-18 Cutting tools Expired - Fee Related JP4435513B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100143055A1 (en) * 2007-05-20 2010-06-10 Guehring Ohg Rotably drivable cutting tool
JP2010264533A (en) * 2009-05-13 2010-11-25 Osg Corp Small diameter rotary tool with fluid supplying hole
WO2011110159A1 (en) * 2010-03-08 2011-09-15 Gühring Ohg Rotationally drivable material-removing tool
JP2014058035A (en) * 2012-09-14 2014-04-03 Mikron Tool Sa Agno Milling tool
WO2020221603A1 (en) * 2019-05-02 2020-11-05 Dixi Polytool Sa Cutting tool with integrated lubrication

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100143055A1 (en) * 2007-05-20 2010-06-10 Guehring Ohg Rotably drivable cutting tool
US8568068B2 (en) * 2007-05-20 2013-10-29 Guehring Ohg Rotatably drivable cutting tool
JP2010264533A (en) * 2009-05-13 2010-11-25 Osg Corp Small diameter rotary tool with fluid supplying hole
WO2011110159A1 (en) * 2010-03-08 2011-09-15 Gühring Ohg Rotationally drivable material-removing tool
JP2014058035A (en) * 2012-09-14 2014-04-03 Mikron Tool Sa Agno Milling tool
WO2020221603A1 (en) * 2019-05-02 2020-11-05 Dixi Polytool Sa Cutting tool with integrated lubrication
US11590581B2 (en) 2019-05-02 2023-02-28 Dixi Polytool Sa Cutting tool with integrated lubrication
EP4230332A1 (en) * 2019-05-02 2023-08-23 DIXI Polytool SA Cutting tool with integrated lubrication

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