JP5251063B2 - Cutting tools - Google Patents

Cutting tools Download PDF

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JP5251063B2
JP5251063B2 JP2007262003A JP2007262003A JP5251063B2 JP 5251063 B2 JP5251063 B2 JP 5251063B2 JP 2007262003 A JP2007262003 A JP 2007262003A JP 2007262003 A JP2007262003 A JP 2007262003A JP 5251063 B2 JP5251063 B2 JP 5251063B2
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tool
axis
tip
runout
screw
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JP2009090399A (en
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正治 滝口
壮史 鷲見
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Mitsubishi Materials Corp
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Mitsubishi Materials Corp
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Description

本発明は、工作機械に取り付けられる工具ホルダに穴加工工具等の工具本体が備えられてなる切削工具に係り、特に振れ調整機能を備えた切削工具に関する。   The present invention relates to a cutting tool in which a tool holder attached to a machine tool is provided with a tool body such as a drilling tool, and more particularly to a cutting tool having a deflection adjusting function.

工作機械等を用いて被切削物に穴あけ加工等の切削加工を施す場合、工作機械の主軸に装着された工具ホルダの先端に穴加工工具等の工具本体を装着し、工作機械の主軸を軸線回りに回転させて被切削物に対して所望の加工を施すことが行われている。   When performing cutting such as drilling on a workpiece using a machine tool etc., a tool body such as a drilling tool is attached to the tip of the tool holder attached to the spindle of the machine tool, and the spindle of the machine tool is set to the axis. A desired process is performed on a workpiece by rotating it around.

このような切削加工においては、加工穴を精度良く形成するためには、工具ホルダの軸線と穴加工工具の軸線とを良く一致させるように固定して、穴加工工具の振れを防止する必要がある。つまり、この切削工具においては、穴加工工具の振れ出しを高い精度で調整しなければならない。   In such a cutting process, in order to form a processed hole with high accuracy, it is necessary to fix the axis of the tool holder and the axis of the drilling tool so that they match well to prevent the drilling of the drilling tool. is there. That is, in this cutting tool, the runout of the drilling tool must be adjusted with high accuracy.

そこで従来例として、例えば特許文献１には、工具ホルダの一部を加圧するネジ部材を回動させるという操作でもって、工具ホルダの先端部の軸線を変位させ、該先端部に装着された工具本体の中心軸線を工具ホルダの回転軸線に合わせるようにした振れ修正手段を備えたものが開示されている。この従来例の切削工具における振れ修正手段には、工具本体の径方向外側からから径方向内側に向かって軸線に垂直な方向に沿ってねじ込まれたネジ部材が設けられており、このネジ部材をねじ込むことによって、工具本体に対して径方向内側かつ工具先端側に向かう押圧力を与え、該工具本体の先端部の軸線を変位させて工具の振れを修正している。
特開２００１−１３８１６２号公報 Therefore, as a conventional example, for example, Patent Document 1 discloses that a tool attached to the tip portion is displaced by displacing the axis of the tip portion of the tool holder by rotating a screw member that presses a part of the tool holder. There is disclosed a device provided with a shake correcting means in which the central axis of the main body is aligned with the rotational axis of the tool holder. The vibration correcting means in the cutting tool of this conventional example is provided with a screw member screwed along a direction perpendicular to the axis from the radially outer side of the tool body toward the radially inner side. By screwing, a pressing force directed radially inward and toward the tip of the tool is applied to the tool main body, and the axis of the tip of the tool main body is displaced to correct the tool runout.
JP 2001-138162 A

ところで、上記のような従来例の振れ修正手段には以下のような問題があった。即ち、従来例においては、上記のようにネジ部材が軸線に垂直な方向に沿って挿入され、工具本体に当接した際に発生する径方向内側かつ工具先端側への斜め方向の分力によって振れ修正を行っている。従って、ネジ部材を挿入する際には、振れ修正を行うための力に加えて、振れ修正に寄与しない力も工具本体に与えることになるため、工具本体に余分な負担を及ぼす他、振れ修正を行うためには全体として大きな力を要することになり、容易かつ簡便に振れ調整を行うことができないという問題があった。   However, the conventional shake correcting means as described above has the following problems. That is, in the conventional example, as described above, the screw member is inserted along the direction perpendicular to the axis, and is generated by the component force in the diagonally inner direction and the tool tip side that is generated when the screw member comes into contact with the tool body. The shake is corrected. Therefore, when inserting the screw member, in addition to the force for correcting the runout, a force that does not contribute to the runout correction is also given to the tool body. In order to perform this, a large force is required as a whole, and there is a problem that the shake adjustment cannot be performed easily and simply.

この発明はこのような課題に鑑みてなされたものであり、工具ホルダに備えられた工具本体の振れ調整を最小限の力で容易かつ簡便に行うことのできる切削工具を提供することを目的とする。   This invention is made in view of such a subject, and it aims at providing the cutting tool which can perform easily and simply the run-out adjustment of the tool main body with which the tool holder was equipped with the minimum force. To do.

前記課題を解決するため、この発明は以下の手段を提案している。
即ち、本発明に係る切削工具は、工作機械の主軸に取り付けられ軸線回りに回転される工具ホルダの先端部に、前記軸線に沿って延びる工具本体を備えた切削工具において、前記工具ホルダの外周側面に、先端側に向かうに従い外周側に向かうテーパ状の円環面を備えた環状溝が設けられるとともに、該環状溝を覆うリング部材が前記外周側面に摺動可能に外嵌され、前記リング部材の外周側から径方向内側かつ工具先端側に向かって斜めに穿設されて前記環状溝に連通するネジ孔が設けられ、前記ネジ孔の軸線と前記工具ホルダの軸線とがなす角度が４５°とされるとともに、前記ネジ孔の軸線と前記環状溝の前記円環面とがなす角度は９０°とされ、該ネジ孔にねじ込まれた振れ調整ネジが、前記環状溝の前記円環面を押圧して、前記工具本体を径方向に変位させ、前記工具本体の振れを調整することを特徴としている。 In order to solve the above problems, the present invention proposes the following means.
That is, the cutting tool according to the present invention is a cutting tool provided with a tool body extending along the axis at the tip of a tool holder that is attached to the spindle of a machine tool and rotated about the axis, and the outer periphery of the tool holder An annular groove having a tapered annular surface facing the outer peripheral side toward the distal end side is provided on the side surface, and a ring member covering the annular groove is slidably fitted on the outer peripheral side surface, and the ring threaded hole communicating with the annular groove is provided is drilled obliquely toward the outer periphery of the member radially inward and the tool distal end side, the angle between the axis of the tool holder with the axis of the threaded hole 45 And the angle formed by the axis of the screw hole and the annular surface of the annular groove is 90 °, and the runout adjusting screw screwed into the screw hole is connected to the annular surface of the annular groove. Press the tool The main body is displaced in the radial direction to adjust the deflection of the tool main body.

このような特徴の切削工具では、リング部材は工具ホルダに対して摺動可能、即ち周方向に回転させることができるため、これに伴って振れ調整ネジを、工具ホルダの周方向において工具本体の先端が外周側に傾いている側に配置させることができる。そして、振れ調整ネジをねじ込むと、ネジ孔が環状溝に連通しているため、該振れ調整ネジの先端が環状溝の円環面に当接し、さらにねじ込むことによって工具ホルダが工具先端側かつ径方向内側に向かって斜め方向に押圧される。   In the cutting tool having such a feature, the ring member is slidable with respect to the tool holder, that is, can be rotated in the circumferential direction. Accordingly, the runout adjusting screw is attached to the tool body in the circumferential direction of the tool holder. The tip can be arranged on the side inclined toward the outer peripheral side. When the runout adjustment screw is screwed in, the screw hole communicates with the annular groove. Therefore, the tip of the runout adjustment screw comes into contact with the annular surface of the annular groove, and further screwed in, the tool holder moves to the tool tip side and the diameter. It is pressed in an oblique direction toward the inner side.

これにより、工具ホルダの先端部に位置する工具本体を、振れ調整ネジを配置した箇所に応じて径方向内側に変位させることができ、該工具本体の振れを調整することが可能となる。また、工具ホルダに対して、径方向内側かつ工具先端側へ向かって直接的に力を及ぼすことができるため、振れ調整ネジによる押圧力を効率良く振れ調整に寄与させることができ、より小さな力で振れ調整を行うことが可能となる。   Thereby, the tool main body located in the front-end | tip part of a tool holder can be displaced to a radial inside according to the location which has arrange | positioned the shake adjustment screw, and it becomes possible to adjust the shake of this tool main body. In addition, since it is possible to exert a force directly on the tool holder in the radial direction and toward the tool tip side, the pressing force by the runout adjustment screw can efficiently contribute to runout adjustment. The shake adjustment can be performed with.

また、本発明に係る切削工具は、前記振れ調整ネジの先端が平坦状に形成され、前記円環面に垂直に面接触することを特徴としている。   The cutting tool according to the present invention is characterized in that a tip of the runout adjustment screw is formed in a flat shape and is in surface contact with the annular surface perpendicularly.

振れ調整ネジが環状溝の円環面に対して垂直な面当たりとなるため、振れ調整ネジによる押圧力を確実かつ安定的に工具ホルダに伝達することが可能となる。   Since the runout adjustment screw comes into contact with the surface perpendicular to the annular surface of the annular groove, the pressing force by the runout adjustment screw can be reliably and stably transmitted to the tool holder.

さらに、本発明に係る切削工具においては、前記振れ調整ネジが、前記軸線に直交する平面上において周方向に等間隔に複数配置されていることを特徴としている。これにより柔軟かつ確実に振れ調整を行うことが可能となる。   Furthermore, the cutting tool according to the present invention is characterized in that a plurality of the runout adjustment screws are arranged at equal intervals in the circumferential direction on a plane orthogonal to the axis. This makes it possible to adjust the deflection flexibly and reliably.

本発明に係る切削工具によれば、振れ調整ネジが工具ホルダの径方向内側かつ工具先端側へ向かって直接的に力を及ぼすことによって、最小限の力で容易かつ簡便に工具本体の振れ調整を行うことができる。   According to the cutting tool of the present invention, the runout adjustment screw exerts a force directly toward the inner side in the radial direction of the tool holder and toward the tip end of the tool, so that the runout of the tool body can be easily and easily adjusted with a minimum force. It can be performed.

以下、本発明の切削工具の実施の形態について、図１及び図２を用いて詳細に説明する。図１は本発明の実施形態である切削工具を示す一部を破断した縦断面図であり、図２は本実施形態における切削工具の工具ホルダの部分拡大図である。   Hereinafter, embodiments of the cutting tool of the present invention will be described in detail with reference to FIGS. 1 and 2. FIG. 1 is a partially cutaway longitudinal sectional view showing a cutting tool according to an embodiment of the present invention, and FIG. 2 is a partially enlarged view of a tool holder of the cutting tool according to this embodiment.

本実施形態の切削工具１は、図１に示すように、後端側（図１において上側）が工作機械の主軸に取り付けられ軸線Ｏ回りに回転される工具ホルダ１０と、該工具ホルダ１０の先端部に穿設された装着孔１１ａに圧入されて軸線Ｏに沿って先端側（図１において下側）に延びる穴加工工具（リーマ）としての工具本体２０とから構成されている。   As shown in FIG. 1, the cutting tool 1 of the present embodiment includes a tool holder 10 whose rear end side (upper side in FIG. 1) is attached to a main shaft of a machine tool and rotated around an axis O, and the tool holder 10. The tool body 20 is a tool body 20 as a drilling tool (reamer) that is press-fitted into a mounting hole 11a drilled in the tip portion and extends along the axis O to the tip side (lower side in FIG. 1).

工具本体２０は、軸線Ｏを中心として形成された長尺円柱状をなしており、工具本体２０の先端側が被切削物に直接的に加工を施す加工部２１とされ、工具本体２０の後端側は、前述の工具ホルダ１０の装着孔１１ａに圧入されて固定される取付シャンク部２２とされている。   The tool main body 20 has a long cylindrical shape formed around the axis O, and the tip end side of the tool main body 20 serves as a processing portion 21 that directly processes a workpiece, and the rear end of the tool main body 20 The side is a mounting shank portion 22 that is press-fitted into the mounting hole 11a of the tool holder 10 and fixed.

また、この工具本体２０の先端面２３には、加工部２１よりも一段小径とされたパイロット２４が設けられている。さらに、この工具本体２０には、取付シャンク２２の後端面２５に開口して軸線Ｏに沿って工具先端側に延びて所定の位置まで達するクーラント供給孔２６が穿設されているとともに、このクーラント供給孔２６から工具本体２０の径方向外側かつ工具先端側に向かって斜めに延びて工具本体２０の外周面に開口するクーラント吐出孔２７が穿設されている。   Further, a pilot 24 having a one-step smaller diameter than the processing portion 21 is provided on the tip surface 23 of the tool body 20. Further, the tool body 20 is provided with a coolant supply hole 26 that opens to the rear end surface 25 of the mounting shank 22 and extends to the tool front end side along the axis O to reach a predetermined position. A coolant discharge hole 27 that extends obliquely from the supply hole 26 toward the radially outer side of the tool body 20 and toward the tip end side of the tool and opens to the outer peripheral surface of the tool body 20 is formed.

この工具本体２０の加工部２１の先端側には工具先端側及び工具径方向外側に向けて開口された凹部２８が形成されており、この凹部２８には前述のクーラント供給孔２６から延びるクーラント排出孔２７が開口されている。そして、本実施形態においては、凹部２８の工具回転方向後方側に切刃を備えたインサート２９が取り付けられている。   A concave portion 28 is formed on the distal end side of the processing portion 21 of the tool body 20 so as to open toward the distal end side of the tool and the outer side in the tool radial direction, and the coolant discharge extending from the aforementioned coolant supply hole 26 is formed in the concave portion 28. A hole 27 is opened. And in this embodiment, the insert 29 provided with the cutting blade is attached to the tool rotation direction back side of the recessed part 28.

また、この工具本体２０の加工部２１の外周部には、硬質材料で構成され、外形が概略長円平板状をなす複数のガイドパッド３０が軸線Ｏと平行に延びるように配置されており、本実施形態では、６つのガイドパッド３０が周方向に等間隔となるように配置されている。   In addition, a plurality of guide pads 30 that are made of a hard material and whose outer shape forms a substantially oval plate shape are arranged on the outer peripheral portion of the processing portion 21 of the tool body 20 so as to extend in parallel with the axis O. In the present embodiment, the six guide pads 30 are arranged at equal intervals in the circumferential direction.

工具ホルダ１０は、図１に示すように、軸線Ｏに沿って形成された概略多段円柱状の形状を有している。この工具ホルダ１０の先端部は、工具本体２０を挿入するための装着孔１１ａが穿設されて円筒形状をなす工具装着部１１とされている。なお、この装着孔１１ａの内径は、工具本体２０の取付シャンク部２２の外径と略同一とされており、工具本体２０が圧入された状態では、装着孔１１ａと取り付けシャンク部２２が密着するようになっている。   As shown in FIG. 1, the tool holder 10 has a substantially multi-stage cylindrical shape formed along the axis O. A tip end portion of the tool holder 10 is a tool mounting portion 11 having a cylindrical shape with a mounting hole 11a for inserting the tool body 20 formed therein. The inner diameter of the mounting hole 11a is substantially the same as the outer diameter of the mounting shank portion 22 of the tool main body 20, and the mounting hole 11a and the mounting shank portion 22 are in close contact with each other when the tool main body 20 is press-fitted. It is like that.

工具ホルダ１０における工具装着部１１の後端側には、リング取付部１２が形成され、このリング取付部１２にリング部材１７が取り付けられている。リング取付部１２は、工具装着部１１の直ぐ後端側に位置し該工具装着部１１よりも外径が一段大きく形成されたリング取付面１３と、このリング取付面１３の直ぐ後端側に位置し該リング取付面１３よりもさらに外径が一段大きく形成された大径部１４とを有しており、このリング取付面１３と大径部１４との間の段部が軸線Ｏに垂直となる平坦面とされた当接段部１５とされている。   A ring attachment portion 12 is formed on the rear end side of the tool mounting portion 11 in the tool holder 10, and a ring member 17 is attached to the ring attachment portion 12. The ring mounting portion 12 is positioned immediately on the rear end side of the tool mounting portion 11 and has a ring mounting surface 13 having an outer diameter larger than that of the tool mounting portion 11, and on the rear end side of the ring mounting surface 13. And a large-diameter portion 14 having an outer diameter one step larger than that of the ring mounting surface 13, and a step portion between the ring mounting surface 13 and the large-diameter portion 14 is perpendicular to the axis O. The contact step 15 is a flat surface.

リング取付面１３には、このリング取付面１３の外周面を軸線Ｏを中心として環状に、かつその断面がＶ字状に刻設されたＶ字溝（環状溝）１６が形成されている。そして、このＶ字溝１６を構成する２つの円環面１６ａ、１６ｂのうち工具先端側の円環面１６ａが後述する振れ調節ネジ１９によって押圧される。なお、この２つの円環面１６ａ、１６ｂのなす角は略９０°とされ、軸線Ｏに垂直な平面に対して対称とされている。   The ring mounting surface 13 is formed with a V-shaped groove (annular groove) 16 in which the outer peripheral surface of the ring mounting surface 13 is formed in an annular shape centering on the axis O and the cross section thereof is formed in a V shape. Of the two annular surfaces 16a and 16b constituting the V-shaped groove 16, the annular surface 16a on the tool tip side is pressed by a deflection adjusting screw 19 described later. The angle formed by the two annular surfaces 16a and 16b is approximately 90 °, and is symmetric with respect to a plane perpendicular to the axis O.

リング部材１７は、軸線Ｏを中心とした概略円筒形状をなしており、その内周面１７ａの内径はリング取付部１２のリング取付面１３の外径と略同一に形成されているとともに、外周面１７ｂの径はリング取付部１２の大径部１４の径と略同一に形成され、該リング部材１７の軸線Ｏ方向の長さはリング取付部１２のリング取付面１３の軸線Ｏ方向の長さと略同一とされている。また、このリング部材１７の工具後端側を向く端面は当接端面１７ｃとされている。   The ring member 17 has a substantially cylindrical shape centered on the axis O, and the inner diameter of the inner peripheral surface 17a is formed substantially the same as the outer diameter of the ring mounting surface 13 of the ring mounting portion 12, and The diameter of the surface 17b is formed substantially the same as the diameter of the large-diameter portion 14 of the ring mounting portion 12, and the length of the ring member 17 in the axis O direction is the length of the ring mounting surface 13 of the ring mounting portion 12 in the axis O direction. It is almost the same. Further, an end surface of the ring member 17 facing the tool rear end side is a contact end surface 17c.

そして、このようなリング部材１７は、内周面１７ａがリング取付面１３に外嵌するようにして、かつ当接端面１７ｃが当接段部１５に当接するようにして工具ホルダ１０のリング取付部１２に取り付けられる。この際、リング部材１７の内周面１７ａとリング取付面１３とは摺動可能とされており、リング部材１７は周方向に自由に回転することができるようになっている。   The ring member 17 is attached to the ring of the tool holder 10 so that the inner peripheral surface 17a is fitted on the ring mounting surface 13 and the contact end surface 17c is in contact with the contact step portion 15. It is attached to the part 12. At this time, the inner peripheral surface 17a of the ring member 17 and the ring mounting surface 13 are slidable, and the ring member 17 can freely rotate in the circumferential direction.

このリング部材１７には、外周面１７ｂから内周面１７ａにかけて工具先端側に向かって斜めに穿設されたネジ孔１８が、軸線Ｏに直交する平面上において周方向に均等に間隔を空けて複数形成されており、このネジ孔１８のリング部材１７の内周面１７ａにおける開口部は、リング部材１７を工具ホルダ１０のリング取付部１２に取り付けた状態でＶ字溝１６に連通するようになっている。なお、本実施形態では、リング部材１７のネジ孔１８の軸線Ｐと工具ホルダ１０の軸線Ｏとがなす角度は４５°とされており、ネジ孔１８の軸線ＰとＶ字溝１６の工具先端側の円環面１６ａとがなす角度は９０°とされている。   In the ring member 17, screw holes 18 that are formed obliquely from the outer peripheral surface 17b to the inner peripheral surface 17a toward the tool tip side are evenly spaced in the circumferential direction on a plane orthogonal to the axis O. A plurality of openings are formed in the inner peripheral surface 17a of the ring member 17 of the screw hole 18 so as to communicate with the V-shaped groove 16 in a state where the ring member 17 is attached to the ring attachment portion 12 of the tool holder 10. It has become. In the present embodiment, the angle formed by the axis P of the screw hole 18 of the ring member 17 and the axis O of the tool holder 10 is 45 °, and the axis P of the screw hole 18 and the tool tip of the V-shaped groove 16 are formed. The angle formed by the annular surface 16a on the side is 90 °.

そして、このネジ孔１８のそれぞれには先端が軸線Ｐに垂直な平坦状の押圧面１９ａとされた振れ調整ネジ１９が挿入されており、この振れ調整ネジ１９をねじ込むことによって、Ｖ字溝１６の工具先端側の円環面１６ａが垂直に押圧されるように構成されている。   Each of the screw holes 18 is inserted with a shake adjusting screw 19 whose tip is a flat pressing surface 19a perpendicular to the axis P. By screwing the shake adjusting screw 19, the V-shaped groove 16 is inserted. The annular surface 16a on the tool tip side is configured to be pressed vertically.

また、図１に示すように、工具ホルダ１０におけるリング取付部１２の工具後端側には、例えば工作機械のＡＴＣ（自動工具交換装置）のアームによって把持可能な把持部１０ａが形成され、また工具ホルダ１０の後端部が、該工具ホルダ１０をマシニングセンタ等の工作機械の主軸に取り付けるためのアーバ１０ｂとされている。   Further, as shown in FIG. 1, a gripping portion 10a that can be gripped by an arm of an ATC (automatic tool changer) of a machine tool, for example, is formed on the tool rear end side of the ring mounting portion 12 in the tool holder 10. The rear end portion of the tool holder 10 is an arbor 10b for attaching the tool holder 10 to a main shaft of a machine tool such as a machining center.

以上のような構成の切削工具１を用いた切削加工について説明する。本実施形態の切削工具１は、アーバ１０ｂが工作機械の主軸に取り付けられて軸線Ｏ回りに回転され、被切削材に予め形成された下穴に工具本体２０の加工部２１が挿入される。このとき、下穴の内壁面は、インサート２９の切刃によって所定の内径の加工穴に仕上げられる。また、切削加工の際には、ガイドパッド３０と切削加工された加工穴の内壁面が摺接して案内されることによって、加工穴の中でリーマを高速回転した際に生じる振動を抑制することができ、加工穴を精度高く成形することができる。さらに、クーラントが工作機械の主軸からクーラント供給孔２６に供給されることによってインサート２９の切削加工の潤滑を良好にすることができる。   Cutting using the cutting tool 1 configured as described above will be described. In the cutting tool 1 of the present embodiment, the arbor 10b is attached to the main shaft of the machine tool and rotated around the axis O, and the processing portion 21 of the tool body 20 is inserted into a prepared hole formed in advance in the workpiece. At this time, the inner wall surface of the prepared hole is finished into a processed hole having a predetermined inner diameter by the cutting blade of the insert 29. Further, when cutting, the guide pad 30 and the inner wall surface of the machined hole are slidably guided to suppress vibration generated when the reamer is rotated at high speed in the machined hole. Can be formed with high accuracy. Furthermore, the coolant is supplied to the coolant supply hole 26 from the spindle of the machine tool, so that the lubrication of the cutting of the insert 29 can be improved.

そして、このような切削加工において、加工穴をさらに精度良く形成するためには、工具ホルダ１０の軸線と工具本体２０の軸線とを高精度に一致させて、工具本体２０の振れを防止する必要がある。即ち、工具本体２０の振れ出しを高い精度で調整しなければならない。   In such a cutting process, in order to form the machining hole with higher accuracy, it is necessary to match the axis of the tool holder 10 and the axis of the tool body 20 with high accuracy to prevent the tool body 20 from swinging. There is. That is, the deflection of the tool body 20 must be adjusted with high accuracy.

このような振れ調整を行う際には、まずリング部材１７を周方向に回転させることによって、振れ調整ネジ１９を工具ホルダ１０の周方向において、工具本体２０の先端が外周側に傾いている側に配置させる。そして、振れ調整ネジ１９を、例えばドライバー等の調整工具によってねじ込むと、ネジ孔１８がＶ字溝１６に連通しているため、該振れ調整ネジ１９の先端の押圧面１９ａがＶ字溝１６の工具先端側の円環面１６ａに達し、さらに振れ調整ネジ１９をねじ込むことによって、ネジ孔１８の傾斜角度方向に、即ち工具径方向内側かつ工具先端側に向かっての斜め方向に円環面１６ａが押圧される。   When performing such runout adjustment, first, the ring member 17 is rotated in the circumferential direction so that the runout adjustment screw 19 is in the circumferential direction of the tool holder 10 and the tip of the tool body 20 is inclined to the outer circumferential side. To be placed. Then, when the shake adjusting screw 19 is screwed in with an adjusting tool such as a screwdriver, for example, the screw hole 18 communicates with the V-shaped groove 16, so that the pressing surface 19 a at the tip of the shake adjusting screw 19 is formed on the V-shaped groove 16. By reaching the annular surface 16a on the tool tip side and further screwing the runout adjustment screw 19, the annular surface 16a in the inclination angle direction of the screw hole 18, that is, in the tool radial direction inner side and in the oblique direction toward the tool tip side. Is pressed.

これによって、工具ホルダ１０の先端部に位置する工具装着部１１に力を及ぼすことができ、装着孔１１ａの軸線を、振れ調整ネジ１９を配置した箇所に応じて径方向内側に変位させることができる。従って、この装着孔１１ａに装着されている工具本体２０の軸線も変位させることができ、振れを調整することが可能となる。   Thereby, a force can be exerted on the tool mounting portion 11 located at the tip of the tool holder 10, and the axis of the mounting hole 11 a can be displaced radially inward depending on the location where the runout adjustment screw 19 is disposed. it can. Accordingly, the axis of the tool body 20 mounted in the mounting hole 11a can also be displaced, and the runout can be adjusted.

このように、工具ホルダ１０に対して工具径方向内側かつ工具先端側に向かって力を与えて、工具装着部１１の軸線を変位させることにより振れ調整を行うことが可能となるが、本実施形態においては振れ調整ネジ１９がこの方向に直接的に力を及ぼすことができるため、振れ調整ネジ１９による押圧力を効率よく振れ調整に寄与させることができる。従って、力のロスがないために、必要以上に力をかけることなく小さな力でもって振れ調整を行うことが可能となる。   As described above, it is possible to adjust the deflection by displacing the axis of the tool mounting portion 11 by applying a force to the tool holder 10 toward the inside in the tool radial direction and toward the tip of the tool. In the embodiment, since the shake adjusting screw 19 can directly exert a force in this direction, the pressing force by the shake adjusting screw 19 can efficiently contribute to the shake adjustment. Therefore, since there is no loss of force, it is possible to perform shake adjustment with a small force without applying an excessive force.

また、振れ調整ネジ１９の押圧面１９ａがＶ字溝１６の工具先端側の円環面１６ａに対して垂直な面当たりとなるため、振れ調整ネジ１９をねじ込むことによる押圧力を安定的に伝達することができ、振れ調整を確実に行うことが可能となる。   Further, since the pressing surface 19a of the deflection adjusting screw 19 comes into contact with a surface perpendicular to the annular surface 16a on the tool tip side of the V-shaped groove 16, the pressing force by screwing the deflection adjusting screw 19 is stably transmitted. Therefore, it is possible to perform the shake adjustment with certainty.

さらに、ネジ孔１８及びこれにねじ込まれる振れ調整ネジ１９が、軸線Ｏに直交する平面上において周方向に等間隔に複数配置されているため、所望の方向から押圧することができ、柔軟かつ確実に振れ調整を行うことが可能となる。   Furthermore, since a plurality of screw holes 18 and deflection adjusting screws 19 screwed into the screw holes 18 are arranged at equal intervals in the circumferential direction on a plane orthogonal to the axis O, the screw holes 18 and the deflection adjusting screws 19 can be pressed from a desired direction, and are flexible and reliable. Therefore, it is possible to perform shake adjustment.

以上、本発明の実施の形態である切削工具１について説明したが、本発明はこれに限定されることなく、その発明の技術的思想を逸脱しない範囲で適宜変更可能である。例えば、本実施形態では、工具ホルダ１０に装着される工具本体２０がリーマである場合について説明したが、これに限定されることなく、例えばドリルやエンドミル等の工具本体が装着されたものであってもよい。   As mentioned above, although the cutting tool 1 which is embodiment of this invention was demonstrated, this invention is not limited to this, It can change suitably in the range which does not deviate from the technical idea of the invention. For example, in the present embodiment, the case where the tool body 20 attached to the tool holder 10 is a reamer has been described. However, the present invention is not limited to this. For example, a tool body such as a drill or an end mill is attached. May be.

本発明の実施形態である切削工具を示す一部を破断した縦断面図である。It is the longitudinal cross-sectional view which fractured | ruptured a part which shows the cutting tool which is embodiment of this invention. 本実施形態における切削工具の工具ホルダの部分拡大図である。It is the elements on larger scale of the tool holder of the cutting tool in this embodiment.

符号の説明Explanation of symbols

１ 切削工具
１０ 工具ホルダ
１１ａ 装着孔
１３ リング取付面（外周側面）
１６ Ｖ字溝（環状溝）
１６ａ 円環面
１７ リング部材
１８ ネジ孔
１９ 振れ調整ネジ
２０ 工具本体
Ｏ 軸線 DESCRIPTION OF SYMBOLS 1 Cutting tool 10 Tool holder 11a Mounting hole 13 Ring attachment surface (outer peripheral side surface)
16 V-shaped groove (annular groove)
16a annular surface 17 ring member 18 screw hole 19 runout adjustment screw 20 tool body O axis

Claims (3)

工作機械の主軸に取り付けられ軸線回りに回転される工具ホルダの先端部に、前記軸線に沿って延びる工具本体を備えた切削工具において、
前記工具ホルダの外周側面に、先端側に向かうに従い外周側に向かうテーパ状の円環面を備えた環状溝が設けられるとともに、該環状溝を覆うリング部材が前記外周側面に摺動可能に外嵌され、
前記リング部材の外周側から径方向内側かつ工具先端側に向かって斜めに穿設されて前記環状溝に連通するネジ孔が設けられ、
前記ネジ孔の軸線と前記工具ホルダの軸線とがなす角度が４５°とされるとともに、前記ネジ孔の軸線と前記環状溝の前記円環面とがなす角度は９０°とされ、
該ネジ孔にねじ込まれた振れ調整ネジが、前記環状溝の前記円環面を押圧して、前記工具本体を径方向に変位させ、前記工具本体の振れを調整することを特徴とする切削工具。 In a cutting tool provided with a tool body extending along the axis at the tip of a tool holder that is attached to the spindle of a machine tool and rotated about the axis,
An annular groove having a tapered annular surface facing the outer peripheral side toward the distal end side is provided on the outer peripheral side surface of the tool holder, and a ring member covering the annular groove is slidably attached to the outer peripheral side surface. Fitted,
A screw hole that is formed obliquely from the outer peripheral side of the ring member to the radially inner side and toward the tool tip side and communicates with the annular groove is provided,
The angle formed by the axis of the screw hole and the axis of the tool holder is 45 °, and the angle formed by the axis of the screw hole and the annular surface of the annular groove is 90 °.
A runout adjusting screw screwed into the screw hole presses the annular surface of the annular groove to displace the tool body in the radial direction to adjust the runout of the tool body. . 前記振れ調整ネジの先端が平坦状に形成され、前記円環面に垂直に面接触することを特徴とする請求項１に記載の切削工具。   The cutting tool according to claim 1, wherein a tip of the runout adjustment screw is formed in a flat shape and is in surface contact with the annular surface perpendicularly. 前記振れ調整ネジが、前記軸線に直交する平面上において周方向に等間隔に複数配置されている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 a plurality of the runout adjustment screws are arranged at equal intervals in the circumferential direction on a plane orthogonal to the axis.
JP2007262003A 2007-10-05 2007-10-05 Cutting tools Expired - Fee Related JP5251063B2 (en)

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