JP4359918B2 - Throwaway drill and operation jig - Google Patents

Throwaway drill and operation jig Download PDF

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JP4359918B2
JP4359918B2 JP2003398195A JP2003398195A JP4359918B2 JP 4359918 B2 JP4359918 B2 JP 4359918B2 JP 2003398195 A JP2003398195 A JP 2003398195A JP 2003398195 A JP2003398195 A JP 2003398195A JP 4359918 B2 JP4359918 B2 JP 4359918B2
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holder
throw
rotation
tip
clamp member
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JP2005153112A (en
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隆 奥村
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Kyocera Corp
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Kyocera Corp
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Description

本発明はホルダと共通の回転軸を有するスローアウェイチップを着脱可能に装着したスローアウェイドリルに関する。   The present invention relates to a throw-away drill in which a throw-away tip having a rotation axis common to a holder is detachably mounted.

工具本体と同軸回転するスローアウェイチップが着脱可能なスローアウェイドリルとしては、特許文献1に開示されているようなスローアウェイチップとホルダをねじにより締付固定する構成が知られている。   As a throw-away drill in which a throw-away tip that rotates coaxially with a tool body is detachable, a configuration is known in which a throw-away tip and a holder are fastened and fixed with screws as disclosed in Patent Document 1.

また、特許文献2に開示されているようなスローアウェイチップのホルダへの固定にねじを用いず、ホルダの弾性変形を利用した自己締付方式にてスローアウェイチップを固定する構成が知られている。
特開2001−293605号公報 特表2002−501441号公報
Also, a configuration is known in which the throw-away tip is fixed by a self-tightening method using elastic deformation of the holder without using a screw for fixing the throw-away tip to the holder as disclosed in Patent Document 2. Yes.
JP 2001-293605 A JP-T-2002-501441

しかしながら、特許文献1に開示されているようなねじによってスローアウェイチップをホルダに固定する構成では、スローアウェイチップの取り付けにねじとドライバーを使用しなければならないため、スローアウェイチップの交換作業が煩雑であるばかりでなく、スローアウェイチップの交換作業中にねじやスローアウェイチップを誤って落下させて紛失してしまう恐れがあった。   However, in the configuration in which the throw-away tip is fixed to the holder with a screw as disclosed in Patent Document 1, a screw and a screwdriver must be used for attaching the throw-away tip. In addition, there is a risk that the screw or the throwaway tip may be accidentally dropped and lost during the replacement of the throwaway tip.

また、特許文献2に開示されているようなホルダの弾性変形を利用してスローアウェイチップを固定する構成では、通常ホルダよりも硬い耐摩耗性に優れた素材からなるスローアウェイチップの拘束部分をホルダ側の拘束部と摺動させて装着しなければならないため、スローアウェイチップの交換作業を繰り返し行うことによってホルダ側拘束面に傷がついてしまったりホルダ側拘束部付近に金属疲労が生じてホルダの弾性変形による支持力が弱まったり、あるいは無理な力が加わってホルダ側拘束面が変形することがあり、ホルダが使用不能になってしまい、早期にホルダを交換しなければならないという問題があった。   Further, in the configuration in which the throw-away tip is fixed by utilizing the elastic deformation of the holder as disclosed in Patent Document 2, the restraining portion of the throw-away tip made of a material that is harder than the holder and has excellent wear resistance is used. Since the holder must be slid and mounted on the restraining part on the holder side, the holder-side restraining surface may be damaged or the metal fatigue may occur near the holder-side restraining part due to repeated replacement of the throw-away tip. The support force due to the elastic deformation of the holder may be weakened or an excessive force may be applied to deform the holder side restraint surface, making the holder unusable and requiring the holder to be replaced at an early stage. It was.

本発明は、このような従来技術の課題を解決するためになされたものであり、ホルダと共通の回転軸を有するスローアウェイチップを着脱可能に装着したスローアウェイドリルにおいて、ホルダを長期間使用できて経済的であるスローアウェイドリルを提供することを目的とする。   The present invention has been made to solve such a problem of the prior art, and in a throw-away drill in which a throw-away tip having a rotation axis common to the holder is detachably mounted, the holder can be used for a long period of time. The purpose is to provide a throwaway drill that is economical and economical.

前記課題を解決するため、請求項1のスローアウェイドリルは、先端側に少なくとも二つの切刃を備えるスローアウェイチップの後端側を、前記スローアウェイチップと共通の回転軸を有するホルダの先端部に着脱可能に装着されてなるスローアウェイドリルにおいて、前記ホルダの先端部には、前記スローアウェイチップおよび前記ホルダと共通の回転軸を有する円筒状基部と該円筒状基部から外周方向へ突出した二つの回転抑止部とからなるクランプ部材が前記回転軸を中心に回転可能にかつ前記回転抑止部の下面が前記ホルダの先端部に対して摺動可能に装着されており、前記クランプ部材の前記回転抑止部の一側面に配設された回転抑止壁面と前記ホルダ先端部に配設された回転伝達壁面との間に前記スローアウェイチップ後端側の回転固定突出部を挟持固定してなることを特徴としている。   In order to solve the above-mentioned problem, the throw-away drill according to claim 1 is configured such that the rear end side of the throw-away tip having at least two cutting blades on the front-end side is disposed at the tip end portion of the holder having a rotation axis common to the throw-away tip. In the throw-away drill that is detachably attached to the holder, the tip of the holder has a cylindrical base portion having a rotation axis in common with the throw-away tip and the holder, and a cylindrical base portion that protrudes outward from the cylindrical base portion. A clamp member comprising two rotation restraining portions is rotatably mounted around the rotation axis, and a lower surface of the rotation restraining portion is slidably attached to a tip portion of the holder, and the rotation of the clamp member A rear end side of the throw-away tip is disposed between a rotation suppression wall surface disposed on one side surface of the suppression portion and a rotation transmission wall surface disposed on the tip of the holder. Is characterized by comprising fixedly hold the rolling anchoring projections.

かかる構成によれば、スローアウェイチップのホルダへの着脱作業が、あらかじめホルダに装着されているクランプ部材の回転動作のみで行えるので、ねじによってチップを固定する方式に比べてスローアウェイチップの交換作業を簡素化および迅速化することができる。また、スローアウェイチップをホルダから着脱する際に、ホルダ自体が傷ついたり摩耗によって変形することを防止し、クランプ部材の交換のみでホルダを長期間にわたって使用することができる。   According to such a configuration, the throw-away tip can be attached to and detached from the holder only by rotating the clamp member mounted in advance on the holder. Therefore, the throw-away tip can be replaced as compared with the method in which the tip is fixed with a screw. Can be simplified and speeded up. Further, when the throw-away tip is detached from the holder, the holder itself is prevented from being damaged or deformed due to wear, and the holder can be used for a long period of time only by replacing the clamp member.

また、請求項2のスローアウェイドリルは、前記回転伝達壁面は前記回転軸に平行な垂直面に対してホルダ先端側が突出した傾斜面からなることを特徴としている。   The throw away drill according to claim 2 is characterized in that the rotation transmission wall surface is formed of an inclined surface protruding from the holder front end side with respect to a vertical surface parallel to the rotation axis.

かかる構成によれば、前記回転伝達壁面がホルダ先端側へのストッパーの役割を果たすことによりスローアウェイチップのホルダ先端側への抜けを防止することができる。   According to this configuration, the rotation transmitting wall surface serves as a stopper toward the holder tip side, so that the throw-away tip can be prevented from coming off to the holder tip side.

また、請求項3のスローアウェイドリルは、前記クランプ部材が前記ホルダよりも軟質の素材からなることを特徴としている。   The throw-away drill according to claim 3 is characterized in that the clamp member is made of a material softer than the holder.

かかる構成によれば、ホルダのクランプ部材との摺動部が、スローアウェイチップの着脱作業に伴うクランプ部材の回転動作を繰り返し行ってもホルダ自体が傷つけられることがなくなるので、定期的にクランプ部材のみを交換すればよくホルダを長期にわたり使用することができ経済的である。   According to such a configuration, the holder itself will not be damaged even if the sliding portion of the holder with the clamp member repeatedly rotates the clamp member in accordance with the attachment / detachment operation of the throw-away tip. It is economical that the holder can be used for a long period of time only by exchanging it.

また、請求項4のスローアウェイドリルは、前記円筒状基部のホルダ側端部にはスリットが形成されていることを特徴としている。   The throw-away drill according to claim 4 is characterized in that a slit is formed at the holder side end of the cylindrical base.

かかる構成によれば、前記クランプ部材を前記ホルダ先端部へ装着した状態において、クランプ部材円筒状基部のホルダ側端部が内側に弾性変形し、その反作用でホルダ側内壁面を強力に押し付ける力が働くので、前記クランプ部材の前記ホルダへの支持力が強くなる。   According to this configuration, in the state where the clamp member is mounted on the holder tip, the holder-side end of the cylindrical base of the clamp member is elastically deformed inward, and the force that strongly presses the holder-side inner wall surface due to its reaction. Since it works, the support force of the clamp member to the holder becomes strong.

また、請求項5のスローアウェイドリルは、前記円筒状基部のホルダ側端部近傍の外周壁面にはくぼみ部が形成されてなるとともに、前記ホルダ側には前記くぼみ部と嵌合すべく隆起部が形成されてなることを特徴としている。   The throw-away drill according to claim 5 is configured such that a hollow portion is formed on an outer peripheral wall surface in the vicinity of the end portion on the holder side of the cylindrical base portion, and a raised portion is formed on the holder side so as to be fitted with the hollow portion. It is characterized by being formed.

かかる構成によれば、前記クランプ部材をホルダ先端側に引き抜こうとする力が働いたとしてもホルダ側に形成された隆起部とクランプ部材側に形成されたくぼみ部がホルダ先端側への抜け止めとして作用するため、より強固な拘束力が得られる。   According to this configuration, even if a force for pulling out the clamp member toward the tip of the holder is applied, the raised portion formed on the holder side and the indented portion formed on the clamp member side serve as a stopper to the holder tip side. As a result, a stronger restraining force can be obtained.

また、請求項6に記載のスローアウェイドリルは、前記クランプ部材の前記回転抑止部下面と前記ホルダ先端部との摺動面において、前記スローアウェイチップを挟持固定時に前記ホルダと前記クランプ部材が嵌合する段差を備えたことを特徴としている。   The throw-away drill according to claim 6 is configured such that the holder and the clamp member are fitted to each other when the throw-away tip is clamped and fixed on the sliding surface between the lower surface of the rotation suppression portion and the tip of the holder of the clamp member. It is characterized by having a matching step.

かかる構成によれば、前記クランプ部材を工具回転方向に回す力が働いた際の、前記クランプ部材のゆるみ防止として作用する。   According to this structure, when the force which rotates the said clamp member to a tool rotation direction acted, it acts as prevention of the loosening of the said clamp member.

また、請求項7に記載のスローアウェイドリルは、前記回転抑止壁面が前記回転軸に平行な垂直面に対してホルダ先端側が突出した傾斜面からなるとともに、前記回転伝達壁面の傾斜角が前記回転抑止壁面の傾斜角よりも大きいことを特徴としている。   The throw-away drill according to claim 7, wherein the rotation-inhibiting wall surface is formed of an inclined surface projecting from a holder front side with respect to a vertical surface parallel to the rotation axis, and an inclination angle of the rotation transmission wall surface is the rotation angle. It is characterized by being larger than the inclination angle of the deterring wall surface.

かかる構成によれば、前記スローアウェイチップを前記ホルダに押え付ける方向に力が働くとともに、前記クランプ部材による締め付けを緩める方向には力が作用しない。   According to this configuration, a force acts in a direction in which the throw-away tip is pressed against the holder, and no force acts in a direction in which tightening by the clamp member is loosened.

また、請求項8に記載のスローアウェイドリルは、前記ホルダに形成された前記回転伝達壁面の少なくとも一つは径方向における角度の異なる複数の面で構成されていることを特徴としている。 The throw-away drill according to claim 8 is characterized in that at least one of the rotation transmission wall surfaces formed on the holder is composed of a plurality of surfaces having different angles in the radial direction .

かかる構成によれば、スローアウェイチップの径方向への移動が制限されるので、ホルダへの取り付け後のスローアウェイチップのガタツキを抑制でき、スローアウェイチップとホルダの中心軸の一致も良好となり、高精度の穴あけ加工が実施できる。   According to such a configuration, since the movement of the throw-away tip in the radial direction is restricted, it is possible to suppress backlash of the throw-away tip after being attached to the holder, and the match between the throw-away tip and the center axis of the holder is also good. High precision drilling can be performed.

また、請求項9に記載のスローアウェイドリルは、前記ホルダに流体供給穴が形成されていて、前記角度の異なる面のうち隣り合う2つの面によって決まる仮想延長面の交差線を含む位置に流体供給穴が形成されていることを特徴としている。   Further, in the throw-away drill according to claim 9, a fluid supply hole is formed in the holder, and the fluid is provided at a position including a cross line of a virtual extension surface determined by two adjacent surfaces among the surfaces having different angles. A supply hole is formed.

かかる構成によれば、切削油等の流体を刃先へ供給できるとともに、角度の異なる複数の面で構成された回転伝達壁面の交差部に生じる応力集中を緩和できるという効果もある。   According to this configuration, fluid such as cutting oil can be supplied to the cutting edge, and there is an effect that stress concentration generated at the intersection of the rotation transmission wall surfaces formed by a plurality of surfaces having different angles can be reduced.

また、請求項10に記載のスローアウェイドリルは、前記クランプ部材の前記回転抑止部の外周壁面上端部に凹部を備えるとともに、前記スローアウェイチップを前記ホルダに装着した状態において前記スローアウェイチップの外周側面部の前記凹部に連続する位置に前記回転軸と平行に溝が配設されていることを特徴としている。   The throw-away drill according to claim 10, further comprising a recess at an upper end of an outer peripheral wall surface of the rotation restraining portion of the clamp member, and an outer periphery of the throw-away tip in a state where the throw-away tip is mounted on the holder. A groove is arranged in parallel with the rotation shaft at a position continuous with the concave portion of the side surface portion.

かかる構成によれば、スローアウェイチップの着脱時に操作冶具を用いてクランプ部材を回転させることができ、スローアウェイチップの交換作業を容易に行えるようになる。   According to such a configuration, the clamp member can be rotated using the operation jig when the throw-away tip is attached and detached, and the replacement work of the throw-away tip can be easily performed.

また、請求項11に記載の操作冶具は、前記スローアウェイドリルの先端部を挿入可能な開口部を備えるとともに、該開口部の内壁面には前記クランプ部材の前記回転抑止部の外周壁面上端部に設けられた凹部と係合するための突起部を備えたことを特徴としている。   The operation jig according to claim 11 is provided with an opening into which a tip portion of the throwaway drill can be inserted, and an upper end portion of an outer peripheral wall surface of the rotation restraining portion of the clamp member on an inner wall surface of the opening portion. It is characterized by having a projection for engaging with a recess provided in the.

かかる構成によれば、特にホルダが小径の場合などでクランプ部材を回転させにくいというような状態でも確実にクランプ部材を回転させることができる。   According to such a configuration, the clamp member can be reliably rotated even in a state where it is difficult to rotate the clamp member, particularly when the holder has a small diameter.

本発明のスローアウェイドリルによれば、先端側に少なくとも二つの切刃を備えるスローアウェイチップの後端側を、前記スローアウェイチップと共通の回転軸を有するホルダの先端部に着脱可能に装着されてなるスローアウェイドリルにおいて、前記ホルダの先端部には、前記スローアウェイチップおよび前記ホルダと共通の回転軸を有する円筒状基部と該円筒状基部から外周方向へ突出した二つの回転抑止部とからなるクランプ部材が前記回転軸を中心に回転可能にかつ前記回転抑止部の下面が前記ホルダの先端部に対して摺動可能に装着されており、前記クランプ部材の前記回転抑止部の一側面に配設された回転抑止壁面と前記ホルダ先端部に配設された回転伝達壁面との間に前記スローアウェイチップ後端側の回転固定突出部を挟持固定してなる構成により、スローアウェイチップのホルダへの着脱作業が、あらかじめホルダに装着されているクランプ部材の回転動作のみで行えるので、スローアウェイチップの交換作業の簡素化および迅速化することができる。   According to the throw-away drill of the present invention, the rear end side of the throw-away tip having at least two cutting blades on the front-end side is detachably attached to the tip portion of the holder having a rotation axis common to the throw-away tip. In the throw-away drill, the tip portion of the holder includes a cylindrical base portion having a rotation axis in common with the throw-away tip and the holder, and two rotation restraining portions protruding from the cylindrical base portion in the outer peripheral direction. And a lower surface of the rotation restraining portion is slidably attached to the tip of the holder, and is attached to one side surface of the rotation restraining portion of the clamp member. The rotation fixing protrusion on the rear end side of the throw-away tip is sandwiched between the rotation suppression wall surface disposed and the rotation transmission wall surface disposed at the tip of the holder. With this configuration, the throw-away tip can be attached to and detached from the holder only by rotating the clamp member mounted in advance on the holder, so that the throw-away tip replacement work can be simplified and speeded up. it can.

以下、本発明の実施形態を添付図面により説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

図1乃至図11は本発明の一実施形態を示すものであり、図1は本実施例によるスローアウェイドリル1(以下、単にドリルと略す)の組み立て図、図2は図1のドリル1の組み立て分解作業における(a)第1段階、(b)第2段階、(c)第3段階、(d)第4段階を示す斜視図、図3は本実施例によるドリル1に装着されているスローアウェイチップ2(以下、単にチップと略す)の後端斜視図、図4は本実施例によるドリル1に装着されているクランプ部材4の先端斜視図、図5は図4のクランプ部材4の後端視図、図6は本実施例によるドリル1のホルダ3の先端斜視図、図7は図6のホルダ3の先端視図、図8はクランプ部材4を緩めた状態のドリル1の側面図、図9はクランプ部材4を回転させてチップ2を挟持固定した状態のドリル1の側面図、図10は本実施例によるクランプ部材4の回転を補助するための操作冶具17の下方斜視図、図11(a)乃至(c)は回転伝達壁面と回転抑止壁面の傾斜角の関係を説明するための概略図である。   1 to 11 show an embodiment of the present invention. FIG. 1 is an assembly diagram of a throw-away drill 1 (hereinafter simply referred to as a drill) according to this embodiment, and FIG. 2 is a diagram of the drill 1 of FIG. FIG. 3 is a perspective view showing (a) the first stage, (b) the second stage, (c) the third stage, (d) the fourth stage, and FIG. 3 is attached to the drill 1 according to the present embodiment. 4 is a perspective view of the rear end of the throwaway tip 2 (hereinafter simply referred to as a tip), FIG. 4 is a perspective view of the front end of the clamp member 4 mounted on the drill 1 according to this embodiment, and FIG. 5 is a perspective view of the clamp member 4 of FIG. 6 is a front perspective view of the holder 3 of the drill 1 according to the present embodiment, FIG. 7 is a front end view of the holder 3 of FIG. 6, and FIG. 8 is a side view of the drill 1 with the clamp member 4 loosened. FIGS. 9 and 9 show the state in which the clamp member 4 is rotated and the chip 2 is clamped and fixed. FIG. 10 is a side perspective view of the drill 1, FIG. 10 is a lower perspective view of the operation jig 17 for assisting the rotation of the clamp member 4 according to this embodiment, and FIGS. 11A to 11C are inclinations of the rotation transmission wall surface and the rotation suppression wall surface. It is the schematic for demonstrating the relationship of a corner | angular.

ここで、本実施例によるドリル1は図1に示すように、チップ2、ホルダ3、およびクランプ部材4からなり、2つの切刃5と切屑排出溝6を有する構成となっている。   Here, as shown in FIG. 1, the drill 1 according to the present embodiment includes a chip 2, a holder 3, and a clamp member 4, and has two cutting edges 5 and a chip discharge groove 6.

図3に示すようにチップ2の後端側には2つの回転固定突出部7を備えており、ホルダ3からの回転を受ける回転受動壁面8とクランプ部材4と当接する壁面9を備えている。ここで回転受動壁面8は図3に示すように2つ以上の面で構成されているほうが位置決めしやすく望ましい。また、回転受動壁面8は回転抑止部下面と鋭角をなすように形成するのが望ましい。このような状態ではチップがホルダから外れてしまう可能性が少なくなる。   As shown in FIG. 3, the rear end side of the chip 2 includes two rotation-fixing protrusions 7, and includes a rotary passive wall surface 8 that receives rotation from the holder 3 and a wall surface 9 that contacts the clamp member 4. . Here, the rotary passive wall surface 8 is preferably composed of two or more surfaces as shown in FIG. Moreover, it is desirable to form the rotation passive wall surface 8 so as to form an acute angle with the lower surface of the rotation restraining portion. In such a state, the possibility that the chip is detached from the holder is reduced.

また図4に示すように、クランプ部材4は円筒状基部11と該円筒状基部11から外周方向へ突出した二つの回転抑止部13とから形成されている。ここで、クランプ部材4はホルダよりも軟質の素材からなることが望ましいが、これによりホルダのクランプ部材との摺動部が、スローアウェイチップの着脱作業に伴うクランプ部材の回転動作を繰り返し行っても傷つけられることがなくなるので、ホルダを長期にわたり使用することができ経済的となる。   As shown in FIG. 4, the clamp member 4 is formed of a cylindrical base portion 11 and two rotation suppression portions 13 protruding from the cylindrical base portion 11 in the outer peripheral direction. Here, it is desirable that the clamp member 4 is made of a softer material than the holder. However, the sliding portion of the holder with the clamp member repeatedly performs the rotation operation of the clamp member accompanying the attachment / detachment operation of the throw-away tip. In this case, the holder can be used over a long period of time, which is economical.

図10ではクランプ部材4の回転を補助するための操作冶具17を示しており、図4で示したクランプ部材4の凹部16と嵌り合う突起部18を備えている。クランプ部材4は手で押さえて回転させることもできるように、回転抑止部13の外周壁面にすべり止め15を備えているが、このような専用の操作冶具17を使用する方が、作業の利便性が高まるとともに、特にホルダが小径の場合などでクランプ部材を回転させにくいというような状態でも確実にクランプ部材を回転させることができるという点で望ましい。   FIG. 10 shows an operation jig 17 for assisting the rotation of the clamp member 4, and includes a protrusion 18 that fits into the recess 16 of the clamp member 4 shown in FIG. 4. The clamp member 4 is provided with a non-slip 15 on the outer peripheral wall surface of the rotation restraining portion 13 so that it can be pressed and rotated by hand. However, it is more convenient to use such a dedicated operation jig 17. This is desirable in that the clamp member can be reliably rotated even in a state where it is difficult to rotate the clamp member, particularly when the holder has a small diameter.

また、図6に示すように、ホルダ3の先端部にはチップ2とクランプ部材4の受け入れ箇所を備えており、図3で示したチップ2の回転受動壁面8と当接すべく回転伝達壁面19が備えられている。この回転伝達壁面19はチップの回転受動壁面8と同様に2つの面で構成されている。また、本実施形態では流体供給穴20aを備えているが、この流体供給穴20aは回転受動壁面8を構成している2平面の仮想延長面の交差線を含むように配置されていることが、回転伝達壁面19に加わる応力集中を緩和することができ、ホルダの長寿命化が図れるという点で望ましい。   As shown in FIG. 6, the tip of the holder 3 is provided with a receiving portion for the chip 2 and the clamp member 4, and the rotation transmission wall surface is brought into contact with the rotary passive wall surface 8 of the chip 2 shown in FIG. 19 is provided. The rotation transmission wall surface 19 is composed of two surfaces like the rotation passive wall surface 8 of the chip. Further, in the present embodiment, the fluid supply hole 20a is provided. However, the fluid supply hole 20a is disposed so as to include the intersecting line of the two virtual extension surfaces constituting the rotary passive wall surface 8. The stress concentration applied to the rotation transmission wall surface 19 can be relaxed, which is desirable in that the life of the holder can be extended.

さらに、ホルダ3先端部にはクランプ部材4の円筒状基部11が配設されるべく受け入れ部21が備えられている。この受け入れ部21にはクランプ部材4の円筒状基部11の外周面に設けられたくぼみ部22と嵌り合うように隆起部23が形成されており、クランプ部材4の装着時にはクランプ部材4の円筒状基部11のホルダ側端部がこの隆起部を一旦乗り越える必要があり、この動作はクランプ部材4の押し込みとともに円筒状基部11に設けられたスリット12を弾性的に収縮させることによって行われる。クランプ部材4がホルダ3へ装着された状態で、クランプ部材4は切屑排出溝6の間で自由に回転させることができる。クランプ部材4のスリット12はこの装着状態において完全に形状を回復しているよりも、ある程度の弾性変形を維持したまま受け入れ部21の内壁への弾性押圧力を発生させている方がホルダ3への装着状態におけるガタツキも少なくなるので望ましい。また、クランプ部材4が工具回転方向Aへ容易に外れないように、回転抑止部13下面とホルダ3先端部との摺動面25に段差26を設けて、チップ2装着時にはクランプ部材4がこの段差26を乗り越えるように装着されると、チップ2のホルダ3への拘束がより強固になるので望ましい。   Further, a receiving portion 21 is provided at the tip of the holder 3 so that the cylindrical base portion 11 of the clamp member 4 is disposed. The receiving portion 21 is formed with a raised portion 23 so as to be fitted with a recessed portion 22 provided on the outer peripheral surface of the cylindrical base portion 11 of the clamp member 4. When the clamp member 4 is mounted, the cylindrical shape of the clamp member 4 is formed. The holder-side end portion of the base portion 11 needs to go over the raised portion once, and this operation is performed by elastically contracting the slit 12 provided in the cylindrical base portion 11 as the clamp member 4 is pushed. With the clamp member 4 attached to the holder 3, the clamp member 4 can be freely rotated between the chip discharge grooves 6. Rather than having the shape of the slit 12 of the clamp member 4 fully recovered in this mounted state, the holder 3 is more likely to generate elastic pressing force on the inner wall of the receiving portion 21 while maintaining a certain degree of elastic deformation. This is desirable because there is less backlash in the mounted state. Further, a step 26 is provided on the sliding surface 25 between the lower surface of the rotation restraining portion 13 and the tip of the holder 3 so that the clamping member 4 is not easily detached in the tool rotation direction A. It is desirable that the chip is mounted so as to get over the step 26 because the restraint of the chip 2 on the holder 3 becomes stronger.

ここで本実施形態におけるチップ2のホルダ3への装着方法については、図2に示すように、(a)クランプ部材4をホルダ3に取り付け、回転抑止部13を切屑排出溝6の間に配置する。(b)次いで、チップ2後端側に形成された回転固定突出部7をクランプ部材4の回転抑止壁面14とホルダ3の回転伝達壁面19の間に配置し、チップ2の回転受動壁面8とホルダ3の回転伝達壁面19が当接するまでチップ2を工具回転方向Aと逆方向に回転させる。(c)この状態で操作冶具17の突起部18とクランプ部材4の凹部16を合わせるように操作冶具17を配置する。その後、操作冶具17を工具回転方向Aと逆方向に回転させ、前記摺動面25に設けられた段差26をクランプ部材4が完全に乗り越えるまで回転させることによってチップ2が拘束される。チップ2をホルダ3へ装着後、操作冶具17は突起部18をチップ2の外周側面部に設けられた溝27を通して引き抜かれる。   Here, with respect to the mounting method of the chip 2 to the holder 3 in the present embodiment, as shown in FIG. 2, (a) the clamp member 4 is attached to the holder 3, and the rotation restraining portion 13 is disposed between the chip discharge grooves 6. To do. (B) Next, the rotation fixing protrusion 7 formed on the rear end side of the chip 2 is disposed between the rotation suppression wall surface 14 of the clamp member 4 and the rotation transmission wall surface 19 of the holder 3, and the rotation passive wall surface 8 of the chip 2 The tip 2 is rotated in the direction opposite to the tool rotation direction A until the rotation transmission wall surface 19 of the holder 3 contacts. (C) In this state, the operation jig 17 is arranged so that the protrusion 18 of the operation jig 17 and the recess 16 of the clamp member 4 are aligned. Thereafter, the operating jig 17 is rotated in the direction opposite to the tool rotation direction A, and the tip 2 is constrained by rotating the step 26 provided on the sliding surface 25 until the clamp member 4 completely gets over. After the chip 2 is mounted on the holder 3, the operation jig 17 pulls out the protrusion 18 through the groove 27 provided on the outer peripheral side surface of the chip 2.

また、ホルダ3の回転伝達壁面19の傾斜角αとクランプの回転抑止壁面の傾斜角βの関係は図11(a)に示すように、α>βの関係にあるのが望ましい。図11(b)のような状態では切削中にチップがホルダの回転伝達壁面19に沿ってすべり、外れてしまう可能性があり望ましくない。また、図11(c)のような状態ではドリル1を工作物から引き抜く際に生じるような、チップ2を先端に引き抜く力が発生した際にクランプ部材4にも引き抜く力が発生してしまい、クランプ部材4が段差26を乗り越えて外れてしまう可能性があるため望ましくない。これに対して、図11(a)のような状態では、チップ2の浮き上がりを防止しつつ、クランプ部材4にはホルダ3への押し付け力が発生するので、チップ2をより強固に拘束することができる。   Further, it is desirable that the relationship between the inclination angle α of the rotation transmission wall surface 19 of the holder 3 and the inclination angle β of the rotation prevention wall surface of the clamp is such that α> β as shown in FIG. In the state as shown in FIG. 11 (b), the tip may slide along the rotation transmission wall surface 19 of the holder during cutting, which is not desirable. Further, in the state as shown in FIG. 11C, when a force for pulling the tip 2 to the tip as generated when the drill 1 is pulled from the workpiece is generated, a force for pulling the clamp member 4 is also generated. This is not desirable because there is a possibility that the clamp member 4 gets over the step 26 and comes off. On the other hand, in the state as shown in FIG. 11A, the clamping member 4 generates a pressing force against the holder 3 while preventing the chip 2 from being lifted, so that the chip 2 is more firmly restrained. Can do.

以上、本発明の実施形態を例示したが、本発明は前記実施形態に限定されるものではなく、発明の目的を逸脱しない限り任意のものとすることができることはいうまでもない。   As mentioned above, although embodiment of this invention was illustrated, this invention is not limited to the said embodiment, It cannot be overemphasized that it can be made arbitrary, unless it deviates from the objective of invention.

本実施例によるスローアウェイドリルの組み立て図である。It is an assembly drawing of the throw away drill by a present Example. 図1のスローアウェイドリルの組み立て作業における、(a)第1段階、(b)第2段階、(c)第3段階、(d)第4段階を示す斜視図である。FIG. 5 is a perspective view showing (a) a first stage, (b) a second stage, (c) a third stage, and (d) a fourth stage in the assembling work of the throw-away drill of FIG. 1. 本実施例によるスローアウェイチップの後端斜視図である。It is a rear-end perspective view of the throw away tip by a present Example. 本実施例によるクランプ部材の先端側斜視図である。It is a front end side perspective view of the clamp member by a present Example. 図4のクランプ部材の後端視図である。FIG. 5 is a rear end view of the clamp member of FIG. 4. 本実施例によるホルダの先端側斜視図である。It is a front end side perspective view of the holder by a present Example. 図6のホルダの先端視図である。FIG. 7 is a front view of the holder of FIG. 6. クランプ部材を緩めた状態のスローアウェイドリルの側面図である。It is a side view of the throw away drill of the state which loosened the clamp member. クランプ部材を回転させてスローアウェイチップを挟持固定した状態のスローアウェイドリルの側面図である。It is a side view of the throw-away drill in a state where the clamp member is rotated and the throw-away tip is sandwiched and fixed. 本実施例によるクランプ部材の回転を補助するための操作冶具の下方斜視図である。It is a downward perspective view of the operation jig for assisting rotation of the clamp member by a present Example. (a)〜(c)は回転伝達壁面と回転抑止壁面の傾斜角の関係を説明するための概略図である。(A)-(c) is the schematic for demonstrating the relationship between the inclination angle of a rotation transmission wall surface and a rotation suppression wall surface.

符号の説明Explanation of symbols

1:スローアウェイドリル(ドリル)
2:スローアウェイチップ(チップ)
3:ホルダ
4:クランプ部材
5:切刃
6:切屑排出溝
7:回転固定突出部
8:回転受動壁面
9:クランプ部材と当接する壁面
10:回転軸
11:円筒状基部
12:スリット
13:回転抑止部
14:回転抑止壁面
15:すべり止め
16:操作冶具の突起部係合用凹部
17:クランプ部材の回転を補助するための操作冶具
18:クランプ部材の外周壁面上端部の凹部と係合する突起部
19:回転伝達壁面
20a:ホルダ側流体供給穴
20b:チップ側流体供給穴
21:円筒状基部の受け入れ部
22:くぼみ部
23:隆起部
24:開口部
25:回転抑止部下面とホルダ先端部との摺動面
26:段差
27:チップ外周側面部に設けられた溝
A:工具回転方向
α:回転伝達壁面の傾斜角
β:回転抑止壁面の傾斜角
1: Throw away drill (drill)
2: Throw away tip (chip)
3: Holder 4: Clamp member 5: Cutting blade 6: Chip discharge groove 7: Rotation fixed protrusion 8: Rotation passive wall surface 9: Wall surface in contact with the clamp member 10: Rotating shaft 11: Cylindrical base 12: Slit 13: Rotation Suppressing portion 14: Rotation inhibiting wall surface 15: Non-slip 16: Recess portion for engaging projection portion of operation jig 17: Operation jig for assisting rotation of clamp member 18: Projection engaging with a recess portion at the upper end portion of the outer peripheral wall surface of the clamp member Part 19: Rotation transmission wall surface 20a: Holder side fluid supply hole 20b: Tip side fluid supply hole 21: Cylindrical base receiving part 22: Recessed part 23: Raised part 24: Opening part 25: Lower surface of rotation restraint part and holder tip part Sliding surface 26: Step 27: Groove A provided on the outer peripheral side surface of the chip A: Tool rotation direction α: Inclination angle of rotation transmission wall surface β: Inclination angle of rotation suppression wall surface

Claims (11)

先端側に少なくとも二つの切刃を備えるスローアウェイチップの後端側を、前記スローアウェイチップと共通の回転軸を有するホルダの先端部に着脱可能に装着されてなるスローアウェイドリルにおいて、前記ホルダの先端部には、前記スローアウェイチップおよび前記ホルダと共通の回転軸を有する円筒状基部と該円筒状基部から外周方向へ突出した二つの回転抑止部とからなるクランプ部材が前記回転軸を中心に回転可能にかつ前記回転抑止部の下面が前記ホルダの先端部に対して摺動可能に装着されており、前記クランプ部材の前記回転抑止部の一側面に配設された回転抑止壁面と前記ホルダ先端部に配設された回転伝達壁面との間に前記スローアウェイチップ後端側の回転固定突出部を挟持固定してなることを特徴とするスローアウェイドリル。 In a throw-away drill in which a rear end side of a throw-away tip having at least two cutting edges on the front-end side is detachably attached to a tip portion of a holder having a rotation axis common to the throw-away tip, A clamp member comprising a cylindrical base portion having a common rotation axis with the throw-away tip and the holder and two rotation restraining portions projecting from the cylindrical base portion in the outer peripheral direction is formed around the rotation axis at the distal end portion. A rotation inhibiting wall surface and the holder, which are rotatably mounted on the lower surface of the rotation inhibiting part so as to be slidable with respect to the tip of the holder, and are arranged on one side of the rotation inhibiting part of the clamp member. A throw-out protrusion characterized in that a rotation-fixing projecting portion on the rear end side of the throw-away tip is sandwiched and fixed between a rotation transmission wall surface disposed at a front end portion. Idril. 前記回転伝達壁面は前記回転軸に平行な垂直面に対してホルダ先端側が突出した傾斜面からなることを特徴とする請求項1に記載のスローアウェイドリル。 The throw-away drill according to claim 1, wherein the rotation transmission wall surface is formed of an inclined surface with a holder front end projecting with respect to a vertical surface parallel to the rotation axis. 前記クランプ部材は前記ホルダよりも軟質の素材からなることを特徴とする請求項1または2に記載のスローアウェイドリル。 The throw-away drill according to claim 1 or 2, wherein the clamp member is made of a material softer than the holder. 前記円筒状基部のホルダ側端部にはスリットが形成されていることを特徴とする請求項1乃至3のいずれかに記載のスローアウェイドリル。 The throw-away drill according to any one of claims 1 to 3, wherein a slit is formed at an end of the cylindrical base portion on the holder side. 前記円筒状基部のホルダ側端部近傍の外周壁面にはくぼみ部が形成されてなるとともに、前記ホルダ側には前記くぼみ部と嵌合すべく隆起部が形成されてなることを特徴とする請求項1乃至4のいずれかに記載のスローアウェイドリル。 A hollow portion is formed on an outer peripheral wall surface in the vicinity of the end portion on the holder side of the cylindrical base portion, and a raised portion is formed on the holder side so as to be fitted to the concave portion. Item 5. The throw-away drill according to any one of Items 1 to 4. 前記クランプ部材の前記回転抑止部下面と前記ホルダ先端部との摺動面において、前記スローアウェイチップを挟持固定時に前記ホルダと前記クランプ部材が嵌合する段差を備えたことを特徴とする請求項5に記載のスローアウェイドリル。 The slide surface between the lower surface of the rotation restraining portion of the clamp member and the tip of the holder includes a step for fitting the holder and the clamp member when the throwaway tip is clamped and fixed. 5. A throw away drill according to 5. 前記回転抑止壁面は前記回転軸に平行な垂直面に対してホルダ先端側が突出した傾斜面からなるとともに、前記回転伝達壁面の傾斜角が前記回転抑止壁面の傾斜角よりも大きいことを特徴とする請求項1乃至6のいずれかに記載のスローアウェイドリル。 The rotation suppression wall surface is formed of an inclined surface projecting from the holder tip side with respect to a vertical plane parallel to the rotation axis, and an inclination angle of the rotation transmission wall surface is larger than an inclination angle of the rotation suppression wall surface. The throw-away drill according to any one of claims 1 to 6. 前記ホルダに形成された前記回転伝達壁面の少なくとも一つは径方向における角度の異なる複数の面で構成されていることを特徴とする請求項1乃至7のいずれかに記載のスローアウェイドリル。 The throw-away drill according to any one of claims 1 to 7, wherein at least one of the rotation transmission wall surfaces formed on the holder is composed of a plurality of surfaces having different angles in the radial direction . 前記ホルダに流体供給穴が形成されていて、前記角度の異なる面のうち隣り合う2つの面によって決まる仮想延長面の交差線を含む位置に流体供給穴が形成されていることを特徴とする請求項8に記載のスローアウェイドリル。 The fluid supply hole is formed in the holder, and the fluid supply hole is formed at a position including a cross line of a virtual extension surface determined by two adjacent surfaces among the surfaces having different angles. Item 9. A throwaway drill according to item 8. 前記クランプ部材の前記回転抑止部の外周壁面上端部に凹部を備えるとともに、前記スローアウェイチップを前記ホルダに装着した状態において前記スローアウェイチップの外周側面部の前記凹部に連続する位置に前記回転軸と平行に溝が配設されていることを特徴とする請求項1乃至9のいずれかに記載のスローアウェイドリル。 The upper end of the outer peripheral wall surface of the rotation restraining portion of the clamp member is provided with a concave portion, and the rotation shaft is located at a position continuous with the concave portion of the outer peripheral side surface portion of the throwaway tip when the throwaway tip is mounted on the holder. A throw-away drill according to any one of claims 1 to 9, wherein a groove is disposed in parallel with the throw-away drill. 前記スローアウェイドリルの先端部を挿入可能な開口部を備えるとともに、該開口部の内壁面には前記クランプ部材の前記回転抑止部の外周壁面上端部に設けられた凹部と係合するための突起部を備えたことを特徴とする請求項10に記載のスローアウェイドリルのクランプ部材の回転を補助するための操作冶具。 A projection for engaging with a recess provided in an upper end portion of the outer peripheral wall surface of the rotation restraining portion of the clamp member on the inner wall surface of the opening portion, the opening portion being capable of inserting the tip portion of the throw-away drill. The operation jig for assisting rotation of the clamp member of the throw-away drill according to claim 10, comprising a portion.
JP2003398195A 2003-11-27 2003-11-27 Throwaway drill and operation jig Expired - Fee Related JP4359918B2 (en)

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US9028180B2 (en) * 2012-04-04 2015-05-12 Iscar, Ltd. Cutting tool and cutting head with a resilient coupling portion
US8882413B2 (en) * 2012-11-26 2014-11-11 Iscar, Ltd. Cutting tool and cutting insert with a rearward resilience slit
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