JPH0588823U - Cutting tools - Google Patents
Cutting toolsInfo
- Publication number
- JPH0588823U JPH0588823U JP136692U JP136692U JPH0588823U JP H0588823 U JPH0588823 U JP H0588823U JP 136692 U JP136692 U JP 136692U JP 136692 U JP136692 U JP 136692U JP H0588823 U JPH0588823 U JP H0588823U
- Authority
- JP
- Japan
- Prior art keywords
- tool body
- fitting
- divided pieces
- tip
- key
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
Abstract
(57)【要約】
【目的】 工具本体先端の交換が可能で、切刃チップ設
置位置等の制約が少なく、工具本体外周の切刃チップの
振れ精度の変化も防止できる切削工具を提供する。
【構成】 工具本体１１を軸方向に分割可能な一対の分
割片１６、１７によって構成する。分割片１６、１７の
芯合わせは、嵌合凸部２５及び嵌合凹部３２によって行
い、かつ、分割片１６、１７の相対回転をキー２７とキ
ー穴３４との嵌合によって阻止する。嵌合凸部２５と嵌
合凹部３２の周囲にフランジ面２６、３３を形成し、こ
れにより工具本体外周への嵌合凸部２５、嵌合凹部３２
及びキー２７の露出を防止して、工具本体外周での切刃
チップ装着位置の制約を減らす。分割片１６、１７同士
の連結は軸線上に配置されるネジ部材１８で行う。
(57) [Abstract] [Purpose] To provide a cutting tool in which the tip of the tool body can be replaced, there are few restrictions on the cutting blade tip installation position, etc., and changes in the runout accuracy of the cutting edge tip on the outer periphery of the tool body can be prevented. [Structure] The tool body 11 is composed of a pair of split pieces 16 and 17 that can be split in the axial direction. The centering of the divided pieces 16 and 17 is performed by the fitting convex portion 25 and the fitting concave portion 32, and the relative rotation of the divided pieces 16 and 17 is prevented by fitting the key 27 and the key hole 34. Flange surfaces 26 and 33 are formed around the fitting convex portion 25 and the fitting concave portion 32, whereby the fitting convex portion 25 and the fitting concave portion 32 on the outer circumference of the tool body are formed.
Also, the key 27 is prevented from being exposed to reduce restrictions on the cutting edge tip mounting position on the outer periphery of the tool body. The divided pieces 16 and 17 are connected to each other by a screw member 18 arranged on the axis.
Description
【０００１】[0001]
この考案は、工具本体をその軸線方向に分割可能とした分割式の切削工具に関 する。 The present invention relates to a split type cutting tool in which the tool body can be split in the axial direction.
【０００２】[0002]
被削材を所望形状に加工する切削工具として、従来より、軸状の工具本体の軸 線方向先端側の外周面に、複数の切刃チップが列をなすように着脱自在に装着さ れてなるいわゆるエンドミルが知られている。 Conventionally, as a cutting tool for machining a work material into a desired shape, a plurality of cutting blade tips are detachably mounted in rows on the outer peripheral surface of the axial tool body on the axially front end side. A so-called end mill is known.
【０００３】 ところで、このようなエンドミルでは、工具本体の先端に配置される切刃チッ プの使用頻度が高くかつ切削抵抗も大きいために、かかる切刃チップが短期間の うちに損傷することが希ではなく、これに伴って工具本体の先端部が損傷するこ とも少なくない。そして、このような場合には、僅かに工具本体先端が損傷した だけで高価な工具本体の全体を廃棄、交換する必要が生じて工具の経済性が著し く悪化していた。 そこで、例えば特開昭５８−１７７２１９号公報に示すように、工具本体の先 端側に形成された凹所にカートリッジを着脱自在に嵌装し、このカートリッジに 底刃用切刃チップを取り付けることによって、底刃用切刃チップの損傷時の影響 をカートリッジ部分に止どめ、工具本体自体の損傷を防止するようにしたエンド ミルが提供されている。By the way, in such an end mill, since the cutting edge chip arranged at the tip of the tool body is frequently used and the cutting resistance is large, the cutting edge tip may be damaged in a short period of time. This is not rare, and the tip of the tool body is often damaged due to this. In such a case, even if the tip of the tool body is slightly damaged, it is necessary to discard or replace the entire expensive tool body, and the economical efficiency of the tool is significantly deteriorated. Therefore, for example, as shown in JP-A-58-177219, a cartridge is detachably fitted into a recess formed on the front end side of a tool body, and a cutting blade tip for a bottom blade is attached to the cartridge. Provides an end mill that prevents damage to the tool body itself by stopping the effects of damage to the cutting edge tip for the bottom blade on the cartridge part.
【０００４】 しかしながら、上述した従来のエンドミルは、カートリッジが嵌入される凹所 を工具本体の周方向へ適宜間隔をおいて複数設けた構成であり、凹所間には工具 本体そのものが露出する。従って、未だ工具本体が損傷する可能性が残され、工 具本体自体の保護に関して万全なものとは言い難い。 そこで、例えば図９に示すように、工具本体１を軸線方向に分割してボルト（ 図示略）によって連結可能とし、先端側の分割片２に底刃用切刃チップ３を装着 するとともに、１〜数枚の外周刃用切刃チップ４を装着する一方、後端側の分割 片５にも外周刃用切刃チップ４を装着し、工具本体１の先端側が損傷した際に先 端側の分割片２のみを交換して、工具本体全体の廃棄、交換を不要としたエンド ミルが提供されている。However, the above-described conventional end mill has a configuration in which a plurality of recesses into which the cartridge is fitted are provided at appropriate intervals in the circumferential direction of the tool body, and the tool body itself is exposed between the recesses. Therefore, there is still a possibility that the tool body will be damaged, and it cannot be said that the tool body itself is completely protected. Therefore, for example, as shown in FIG. 9, the tool body 1 is divided in the axial direction so as to be connectable by a bolt (not shown), and the bottom blade cutting blade tip 3 is attached to the tip-side divided piece 2 and ~ While installing several cutting blade tips 4 for the outer peripheral blade, while also mounting the cutting blade tips 4 for the outer peripheral blade on the split piece 5 on the rear end side, when the tip side of the tool body 1 is damaged, An end mill is provided in which only the divided piece 2 is replaced and the entire tool body need not be discarded or replaced.
【０００５】[0005]
しかしながら、図９のエンドミルは、工具本体の保護に関しては万全なものの 、分割片２、５の相対回転を防止するキー６及びキー溝７が工具本体１の外周面 に達するように形成されているために、これらキー６及びキー溝７の工具本体外 周への露出部分を避けてチップポケット８を形成したり、切刃チップ４を取り付 ける必要が生じる等、工具設計上の制約が大きくなるという欠点があった。 また、キー溝７を分割片５の外周に開口させているので、分割片２、５がキー 溝７の長手方向へ相対移動可能となり、このため分割片２、５同士の芯がずれ易 い。ここで、分割片５はその後端側が工作機械の主軸等に把持されるため、その 回転中心は常に工具本体１の回転中心と一致する。しかしながら、工具本体１の 先端側の分割片２は、分割片５を介して回転せしめられるため、分割片５に対し て芯がずれたならば直ちに工具本体１の回転中心から偏芯した状態で回転するこ ととなって切刃チップ３、４の振れ精度に著しい悪化を来す。 この考案は、このような背景の下になされたもので、工具本体の先端の交換を 可能としつつ、切刃チップやチップポケットの形成位置に関する設計上の制約を 解消でき、かつ分割片同士の芯ずれも防止できる切削工具を提供することを目的 とする。 However, although the end mill of FIG. 9 is perfect in protecting the tool body, the key 6 and the key groove 7 for preventing relative rotation of the divided pieces 2 and 5 are formed so as to reach the outer peripheral surface of the tool body 1. Therefore, it is necessary to form the chip pocket 8 while avoiding the exposed portion of the key 6 and the key groove 7 to the outer periphery of the tool body, and it is necessary to attach the cutting edge chip 4, so that there are large restrictions on the tool design. There was a drawback that Further, since the key groove 7 is opened to the outer periphery of the divided piece 5, the divided pieces 2 and 5 can be moved relative to each other in the longitudinal direction of the key groove 7, so that the cores of the divided pieces 2 and 5 are easily displaced. .. Here, since the rear end of the divided piece 5 is gripped by the spindle of the machine tool or the like, the center of rotation of the divided piece 5 always coincides with the center of rotation of the tool body 1. However, since the divided piece 2 on the tip side of the tool body 1 is rotated via the divided piece 5, if the core is displaced with respect to the divided piece 5, immediately in a state of being eccentric from the rotation center of the tool body 1. As a result of rotation, the run-out accuracy of the cutting edge tips 3 and 4 deteriorates significantly. The present invention has been made under such a background, and it is possible to replace the tip of the tool body, solve the design restriction on the forming position of the cutting edge tip and the tip pocket, and divide between the divided pieces. It is an object of the present invention to provide a cutting tool that can prevent misalignment.
【０００６】[0006]
上記課題を解決するためにこの考案は、軸状をなす工具本体の軸線方向先端側 に切刃チップが取り付けられてなる切削工具であって、上記工具本体が、当該工 具本体の軸線方向に分割可能な一対の分割片によって構成され、これら分割片の 接合端に、互いに嵌合して各分割片の径方向への相対移動を阻止する嵌合凸部及 び嵌合凹部が形成され、これら嵌合凸部及び嵌合凹部の周囲には、該嵌合凸部及 び嵌合凹部の全周に渡って伸び、かつ互いに密着可能なフランジ面が形成され、 上記嵌合凸部及び嵌合凹部の間には上記分割片の周方向への相対回転を阻止する キーが設けられ、上記分割片の間には、これら分割片を上記工具本体の軸線方向 に着脱自在に連結する連結部材が配置されていることを特徴とするものである。 ここで、連結部材としては、工具本体の先端面側から操作可能なネジ部材が好 適であり、ネジ部材のなかでも、一端側に上記一対の分割片の一方に形成された ネジ穴と螺合可能な第１の雄ねじ部を有し、他端側に上記第１の雄ねじ部と逆方 向に捻れて上記一対の分割片の他方に形成されたネジ穴と螺合可能な第２の雄ね じ部を有してなるものがより好適である。 In order to solve the above-mentioned problems, the present invention is a cutting tool in which a cutting blade tip is attached to the tip end side in the axial direction of a tool body having an axial shape, wherein the tool body is arranged in the axial direction of the tool body. It is composed of a pair of split pieces that can be split, and at the joint ends of these split pieces, a fitting convex portion and a fitting concave portion that are fitted to each other and prevent relative movement of each divided piece in the radial direction are formed. Around the fitting convex portion and the fitting concave portion, there is formed a flange surface that extends over the entire circumference of the fitting convex portion and the fitting concave portion and can be in close contact with each other. A key for preventing relative rotation of the divided pieces in the circumferential direction is provided between the mating recesses, and a connecting member that detachably connects the divided pieces in the axial direction of the tool body between the divided pieces. Are arranged. Here, as the connecting member, a screw member that can be operated from the tip end surface side of the tool main body is preferable, and among the screw members, a screw hole and a screw hole formed in one of the pair of divided pieces on one end side are used. A second male screw part having a matable first male screw part and twisted in the opposite direction to the first male screw part on the other end side to be screwed into a screw hole formed in the other of the pair of split pieces. The one having a male portion is more preferable.
【０００７】[0007]
上記構成の切削工具においては、工具本体の先端が損傷した場合、連結部材に よる分割片同士の連結を解除し、工具本体先端側に配置される分割片を交換して 再度組み付ければ工具本体を元の状態に復元できる。 分割片同士を組み付けた状態では、キーによって分割片同士の相対回転が阻止 されるので、工具本体の後端側に配置される分割片を回転させることによって工 具本体全体を一体に回転させて所望の切削加工を行い得る。 そして、分割片同士を組み付けた場合、嵌合凸部及び嵌合凹部が嵌合すること によって分割片同士の径方向への相対移動が阻止されるので、分割片の芯ずれが 防止され、工具本体の先端側に配置される分割片に装着される切刃チップの振れ 精度が悪化することもない。 さらに、嵌合凸部及び嵌合凹部の周囲が各分割片のフランジ面によって囲まれ ているので、これら嵌合凸部や嵌合凹部、さらにこれらの間に介在されるキーの いずれも分割片の外周に露出することがない。従って、分割片同士の接合部分に おいては、各フランジ面の外周端のみが工具本体の外周に露出することとなり、 切刃チップの装着位置やチップポケットの形成位置に与える設計上の制約が減少 する。 In the cutting tool with the above configuration, if the tip of the tool body is damaged, disconnect the divided pieces with the connecting member, replace the divided piece placed on the tip side of the tool body, and then reassemble the tool body. Can be restored to its original state. In the state that the divided pieces are assembled together, the relative rotation of the divided pieces is prevented by the key.Therefore, by rotating the divided piece arranged on the rear end side of the tool body, the entire tool body can be rotated together. The desired cutting process can be performed. When the divided pieces are assembled together, the fitting protrusions and the fitting recesses are fitted to each other to prevent the relative movement of the divided pieces in the radial direction. The run-out accuracy of the cutting tip mounted on the divided piece arranged on the tip side of the main body does not deteriorate. Further, since the fitting convex portion and the fitting concave portion are surrounded by the flange surface of each divided piece, the fitting convex portion, the fitting concave portion, and the key interposed therebetween are all divided pieces. Is not exposed on the outer periphery of. Therefore, at the joint between the divided pieces, only the outer peripheral edge of each flange surface is exposed to the outer periphery of the tool body, and there are design restrictions on the mounting position of the cutting blade tip and the formation position of the tip pocket. Decrease.
【０００８】[0008]
【実施例】 以下、図１〜図８を参照して、本考案の一実施例を説明する。 図１〜図３に示すように、本実施例のエンドミル１０は、軸状をなす工具本体 １１の軸線方向先端面及び先端外周面（図では先端側のみ示す。）に３種類の切 刃チップ１３、１４、１５がそれぞれの切刃１３ａ、１４ａ、１５ａを工具本体 １１の回転方向（図２の矢印Ａ方向）へ向けて取り付けられてなるもので、工具 本体１１が、軸線方向に分割可能な一対の分割片１６、１７によって構成され、 これら分割片１６、１７が工具本体１１の軸線方向に沿って配置される一本のネ ジ部材（連結部材）１８によって互いに着脱自在に連結されていることを特徴と する。Embodiment An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 3, the end mill 10 of this embodiment has three types of cutting tips on the axial tip end surface and the tip outer peripheral surface (only the tip end side is shown in the drawing) of a tool body 11 having an axial shape. 13, 14 and 15 are attached with their respective cutting edges 13a, 14a and 15a oriented in the rotation direction of the tool body 11 (direction of arrow A in FIG. 2), and the tool body 11 can be divided in the axial direction. Is composed of a pair of divided pieces 16 and 17, and these divided pieces 16 and 17 are detachably connected to each other by a single screw member (connecting member) 18 arranged along the axial direction of the tool body 11. It is characterized by being
【０００９】 図４及び図５により詳細に示すように、工具本体１１の軸線方向先端側に配置 される一方の分割片１６は外観略円柱状をなし、その先端及び外周には切刃チッ プ１３〜１５が取り付けられるチップ取付座１９〜２１、これらチップ取付座１ ９〜２１に臨むチップポケット２２〜２４が形成されている。なお、切刃チップ １３〜１５のうち、分割片１６の先端中央側に取り付けられる三角形状の切刃チ ップ１３と、分割片１６の先端外周側及び外周面先端に取り付けられる平行四辺 形状の切刃チップ１４とがいわゆる底刃用切刃チップであり、残る三角形状の切 刃チップ１５がいわゆる外周刃用切刃チップである。As shown in more detail in FIGS. 4 and 5, one split piece 16 arranged on the tip side in the axial direction of the tool body 11 has a substantially cylindrical appearance, and a cutting edge chip is provided at the tip and the outer periphery thereof. Chip mounting seats 19 to 21 to which 13 to 15 are mounted, and chip pockets 22 to 24 facing these chip mounting seats 19 to 21 are formed. In addition, among the cutting blade tips 13 to 15, a triangular cutting blade chip 13 attached to the tip center side of the divided piece 16 and a parallelogram shape attached to the tip outer peripheral side and the outer peripheral surface tip of the divided piece 16. The cutting blade tip 14 is a so-called bottom blade cutting blade tip, and the remaining triangular cutting blade tip 15 is a so-called outer peripheral cutting blade tip.
【００１０】 分割片１６の後端側、すなわち分割片１７との接合端には、当該分割片１６の 軸線Ｘ1に沿って後方へ突出する嵌合凸部２５が形成され、その外周面２５ａは 軸線Ｘ1を中心とする円筒面に形成されている。そして、この嵌合凸部２５の外 周側には、軸線Ｘ1と直交する平坦なフランジ面２６が嵌合凸部２５の全周を取 り囲むように形成されている。また、嵌合凸部２５の先端には分割片１６の後方 へ突出するキー２７が形成されている。このキー２７は、嵌合凸部２５の外周面 ２５ａと同軸をなす円筒面２７ａと、互いに平行な一対の平坦面２７ｂとを有し てなるものである。さらに、キー２７の中心部には軸線Ｘ1と同軸をなすネジ穴 ２８が形成され、その一端はキー２７の端面２７ｃに開口せしめられている。そ して、図１により詳細に示すように、分割片１６の内部にはネジ穴２８に連続し てレンチ挿入穴２９が形成され、その一端は分割片１６の先端面中央に開口せし められている。At the rear end side of the split piece 16, that is, at the end joined to the split piece 17, there is formed a fitting projection 25 projecting rearward along the axis X 1 of the split piece 16 and its outer peripheral surface 25a. Is formed on a cylindrical surface centered on the axis X 1 . A flat flange surface 26 orthogonal to the axis X 1 is formed on the outer peripheral side of the fitting convex portion 25 so as to surround the entire circumference of the fitting convex portion 25. A key 27 is formed at the tip of the fitting convex portion 25 so as to project to the rear of the split piece 16. The key 27 has a cylindrical surface 27a coaxial with the outer peripheral surface 25a of the fitting convex portion 25, and a pair of flat surfaces 27b parallel to each other. Further, a screw hole 28 coaxial with the axis X 1 is formed at the center of the key 27, and one end of the screw hole 28 is opened to the end face 27 c of the key 27. Then, as shown in more detail in FIG. 1, a wrench insertion hole 29 is formed inside the divided piece 16 and is continuous with the screw hole 28, and one end of the wrench insertion hole 29 is opened at the center of the tip surface of the divided piece 16. Has been.
【００１１】 一方、図６及び図７により詳細に示すように、分割片１７は、その先端側（図 では先端側のみ示す）が分割片１６と同一径の円柱状に形成され、その外周には 切刃チップ１５が装着されるチップ取付座３０及びチップポケット３１が形成さ れている。なお、チップポケット３１は分割片１６のチップポケット２４と断面 形状及び本数を等しくし、かつ、軸線Ｘ2に対する捻れ角もチップポケット２４ の軸線Ｘ1に対する捻れ角に等しくなっている。また、分割片１７の図示せぬ後 端側には、通常のエンドミルと同様に略円柱状のシャンクが形成されている。On the other hand, as shown in more detail in FIGS. 6 and 7, the split piece 17 is formed in a cylindrical shape having the same diameter as the split piece 16 on the tip side (only the tip side is shown in the drawing), and is formed on the outer periphery thereof. A chip mounting seat 30 to which the cutting blade chip 15 is mounted and a chip pocket 31 are formed. The chip pocket 31 has the same sectional shape and number as the chip pocket 24 of the divided piece 16, and the twist angle with respect to the axis X 2 is also equal to the twist angle with respect to the axis X 1 of the chip pocket 24. Further, on the rear end side (not shown) of the divided piece 17, a substantially columnar shank is formed as in a normal end mill.
【００１２】 そして、図１及び図７に示すように、分割片１７の先端側には断面円形をなす 嵌合凹部３２が軸線Ｘ2に沿って形成されている。この嵌合凹部３２の内径は、 分割片１６の嵌合凸部２５の外径と同一に設定され、また、嵌合凹部３２の深さ は、嵌合凸部２５のフランジ面２６からの高さよりも幾らか大きく設定される。 そして、嵌合凹部３２の周囲には軸線Ｘ2と直交する平坦なフランジ面３３が形 成されている。また、嵌合凹部３２の底面側には軸線Ｘ2に沿って陥没するキー 穴３４が形成されている。このキー穴３４は軸線Ｘ2を中心とする円筒面３４ａ と、互いに平行な平坦面３４ｂとを有し、平坦面３４ｂ間の軸線Ｘ2からの距離 は、上述した分割片１６のキー２７に形成された平坦面２７ｂの軸線Ｘ1からの 距離に等しく設定されている。また、円筒面３４ａの曲率半径は、キー２７の円 筒面２７ａと同等かまたはそれ以上に設定される。さらに、キー穴３４の底面側 にはネジ穴３５が形成されている。このネジ穴３５は軸線Ｘ2と同軸をなし、か つ、分割片１６に形成されたネジ穴２８とは異なる方向へ捻れている。As shown in FIGS. 1 and 7, a fitting recess 32 having a circular cross section is formed along the axis X 2 on the tip side of the split piece 17. The inner diameter of the fitting concave portion 32 is set to be the same as the outer diameter of the fitting convex portion 25 of the split piece 16, and the depth of the fitting concave portion 32 is higher than the flange surface 26 of the fitting convex portion 25. It is set a little larger than Sa. A flat flange surface 33 that is orthogonal to the axis X 2 is formed around the fitting recess 32. Further, a key hole 34 that is depressed along the axis X 2 is formed on the bottom surface side of the fitting concave portion 32. The key hole 34 has a cylindrical surface 34a centered on the axis X 2 and a flat surface 34b parallel to each other. The distance between the flat surfaces 34b and the axis X 2 is determined by the key 27 of the above-mentioned divided piece 16. It is set equal to the distance from the axis X 1 of the formed flat surface 27b. The radius of curvature of the cylindrical surface 34a is set to be equal to or larger than that of the cylindrical surface 27a of the key 27. Further, a screw hole 35 is formed on the bottom surface side of the key hole 34. The screw hole 35 is coaxial with the axis X 2 , and is twisted in a direction different from that of the screw hole 28 formed in the divided piece 16.
【００１３】 また、図１に示すように、ネジ部材１８は、分割片１６、１７のネジ穴２８、 ３５とそれぞれ螺合する第１、第２の雄ねじ部４０、４１と、これら雄ねじ部４ ０、４１を連結する首部４２とが同軸的に形成されてなるもので、図１０に示す ように、第１の雄ねじ部４０の端面側には、六角レンチと嵌合可能な断面六角形 状のレンチ嵌合穴４３が形成されている。Further, as shown in FIG. 1, the screw member 18 includes first and second male screw portions 40 and 41 which are respectively screwed into the screw holes 28 and 35 of the divided pieces 16 and 17, and these male screw portions 4 and 4. As shown in FIG. 10, the neck portion 42 connecting the 0 and 41 is formed coaxially. As shown in FIG. The wrench fitting hole 43 is formed.
【００１４】 以上の構成からなる分割片１６、１７は、図１〜図３に示すように、各々の嵌 合凸部２５と嵌合凹部３２とを嵌合させることによって互いの軸線Ｘ1、Ｘ2を一 致させた状態で組み合わされ、この状態でネジ部材１８によって互いに軸線方向 へ引き寄せられて一体的に固定される。この際、キー２７とキー穴３４とが嵌合 してそれぞれの平坦面２７ｂ、３４ｂが密着し、これによって分割片１６、１７ の相対回転が阻止される。そして、これらキー２７とキー穴３４とが嵌合した状 態において、分割片１６、１７のチップポケット２４、３１が位置合わせされて 軸線方向へ連続し、これに伴って工具本体１１の先端外周面には、複数の切刃チ ップ１５で構成される外周刃用切刃チップの列が複数列（図では４列）形成され る。これにより、本実施例のエンドミル１０が構成される。As shown in FIGS. 1 to 3, the divided pieces 16 and 17 having the above-described configuration are fitted with the fitting convex portions 25 and the fitting concave portions 32, respectively, so that the mutual axis X 1 , They are combined in a state where X 2 is matched, and in this state, they are attracted to each other by the screw member 18 in the axial direction and integrally fixed. At this time, the key 27 and the key hole 34 are fitted and the respective flat surfaces 27b and 34b are brought into close contact with each other, whereby the relative rotation of the divided pieces 16 and 17 is prevented. Then, with the key 27 and the key hole 34 fitted together, the chip pockets 24, 31 of the divided pieces 16, 17 are aligned and continuous in the axial direction. On the surface, a plurality of rows (four rows in the figure) of the cutting edge chips for the outer peripheral blade formed by the plurality of cutting edge chips 15 are formed. As a result, the end mill 10 of this embodiment is constructed.
【００１５】 しかして、以上の構成からなるエンドミル１０においては、嵌合凸部２５と嵌 合凹部３２とが嵌合することによって分割片１６、１７同士の径方向への相対移 動が阻止されるので、両者の芯ずれが防止され、この結果、分割片１６に装着さ れた切刃チップ１３〜１５の振れ精度が悪化することがない。 また、嵌合凸部２５及び嵌合凹部３２の周囲が各分割片１６、１７のフランジ 面２６、３３によって囲まれているので、これら嵌合凸部２５や嵌合凹部３２、 及び、キー２７のいずれも分割片１６、１７の外周に露出せず、僅かにフランジ 面２６、３３の外周端が工具本体１１の外周に露出するのみである。従って、切 刃チップ１５の装着位置やチップポケット２４、３１の形成位置に与える設計上 の制約が図９に示す従来例よりも減少する。そして、工具本体１１の先端側が損 傷した際には分割片１６のみを交換すれば良いので、工具の経済性は従来と同様 に確保される。Therefore, in the end mill 10 having the above-described configuration, the fitting convex portion 25 and the fitting concave portion 32 are fitted to each other, whereby the relative movement of the divided pieces 16 and 17 in the radial direction is prevented. Therefore, the misalignment between the two is prevented, and as a result, the runout accuracy of the cutting blade tips 13 to 15 mounted on the divided piece 16 does not deteriorate. Further, since the fitting convex portion 25 and the fitting concave portion 32 are surrounded by the flange surfaces 26 and 33 of the divided pieces 16 and 17, respectively, the fitting convex portion 25 and the fitting concave portion 32, and the key 27. None of these are exposed to the outer periphery of the divided pieces 16 and 17, and the outer peripheral ends of the flange surfaces 26 and 33 are only slightly exposed to the outer periphery of the tool body 11. Therefore, design restrictions imposed on the mounting position of the cutting edge chip 15 and the forming positions of the chip pockets 24 and 31 are reduced as compared with the conventional example shown in FIG. When the tip side of the tool body 11 is damaged, only the split piece 16 needs to be replaced, so that the economical efficiency of the tool is ensured as in the conventional case.
【００１６】 また、本実施例のエンドミル１０では、分割片１６のレンチ挿入穴２９を介し てネジ部材１８のレンチ嵌合穴４３へ六角レンチを挿入してネジ部材１８を回転 させるだけで分割片１６を着脱できるので、分割片１６の着脱作業を容易かつ短 時間で行い得る。In the end mill 10 of this embodiment, the hexagon wrench is inserted into the wrench fitting hole 43 of the screw member 18 through the wrench insertion hole 29 of the divided piece 16 and the screw member 18 is rotated. Since the 16 can be attached and detached, the work of attaching and detaching the divided piece 16 can be performed easily and in a short time.
【００１７】 なお、以上の実施例では、特に分割片１６、１７の双方に切刃チップ１５を取 り付けているが、本考案はこのような例に限るものではなく、分割片１６の側に のみ切刃チップ１５が取り付けられたエンドミルにも当然適用される。すなわち 、工具本体１１の先端側に配置される分割片１６に切刃チップが装着される切削 工具であれば、振れ精度の維持という本願考案の効果を当然に得ることができる のである。従って、分割片１６に装着される切刃チップも底刃用であると外周刃 用であるとを問わない。 また、キー２７の形状や設置位置は図示の例に限定されず、嵌合凸部２５の外 周面２５ａに設けてもよい。要は、分割片１６、１７同士の相対回転を阻止でき 、かつ、キー及びキー穴の双方が分割片の外周に露出しなければ良いのである。In the above embodiment, the cutting blade tip 15 is attached to both of the divided pieces 16 and 17, but the present invention is not limited to such an example, and the side of the divided piece 16 is not limited thereto. Of course, it also applies to an end mill to which the cutting edge tip 15 is attached. That is, a cutting tool in which the cutting blade tip is mounted on the divided piece 16 arranged on the tip side of the tool body 11 can naturally obtain the effect of the present invention of maintaining the runout accuracy. Therefore, the cutting blade tip mounted on the divided piece 16 may be either for the bottom blade or for the outer peripheral blade. Further, the shape and the installation position of the key 27 are not limited to the illustrated example, and may be provided on the outer peripheral surface 25a of the fitting convex portion 25. The point is that relative rotation between the divided pieces 16 and 17 can be prevented, and both the key and the key hole need not be exposed on the outer periphery of the divided pieces.
【００１８】[0018]
以上説明したように、この考案によれば、嵌合凸部及び嵌合凹部が嵌合するこ とによって分割片同士の芯ずれが防止されて切刃チップの振れ精度が高精度に維 持される。 また、嵌合凸部及び嵌合凹部の周囲が各分割片のフランジ面によって囲まれて いるので、これら嵌合凸部や嵌合凹部、さらにこれらの間に介在されるキーのい ずれも工具本体の外周に露出することがなく、切刃チップの装着位置やチップポ ケットの形成位置に与える設計上の制約が減少する。 さらに、工具本体の先端が損傷した場合には、工具本体の先端側の分割片のみ 交換すれば良いので工具の経済性も当然に高まる。 As described above, according to the present invention, the fitting convex portion and the fitting concave portion are fitted to each other, thereby preventing the misalignment of the divided pieces from each other and maintaining the runout accuracy of the cutting edge tip with high accuracy. It In addition, since the periphery of the fitting convex portion and the fitting concave portion is surrounded by the flange surface of each divided piece, any of the fitting convex portion or the fitting concave portion and any key interposed between them can be used by the tool. Since it is not exposed to the outer periphery of the main body, design restrictions on the mounting position of the cutting blade tip and the formation position of the tip pocket are reduced. Further, if the tip of the tool body is damaged, only the divided pieces on the tip side of the tool body need to be replaced, which naturally increases the economical efficiency of the tool.
【図１】本考案の一実施例に係るエンドミル先端側の軸
方向断面図である。FIG. 1 is an axial sectional view of a tip side of an end mill according to an embodiment of the present invention.
【図２】図１に示すエンドミルの底面図である。FIG. 2 is a bottom view of the end mill shown in FIG.
【図３】図１に示すエンドミルの側面図である。3 is a side view of the end mill shown in FIG. 1. FIG.
【図４】工具本体の先端側の分割片の側面図である。FIG. 4 is a side view of the divided piece on the tip side of the tool body.
【図５】図４のＶ方向からの矢視図である。5 is a view from the direction V in FIG.
【図６】工具本体の後端側の分割片の側面図である。FIG. 6 is a side view of the divided piece on the rear end side of the tool body.
【図７】図６のVII方向からの矢視図である。FIG. 7 is a view from the direction of the arrow VII in FIG.
【図８】図１のVIII方向からの矢視図である。FIG. 8 is a view from the direction of the arrow VIII in FIG.
【図９】従来例のエンドミルの軸方向断面図である。FIG. 9 is an axial sectional view of a conventional end mill.
１０ エンドミル １１ 工具本体 １３，１４，１５ 切刃チップ １６，１７ 分割片 １８ ネジ部材（連結部材） ２５ 嵌合凸部 ２６，３３ フランジ面 ２７ キー ２８，３５ 分割片のネジ穴 ３２ 嵌合凹部 ４０ 第１の雄ねじ部 ４１ 第２の雄ねじ部 10 End Mill 11 Tool Body 13, 14, 15 Cutting Blade Tip 16, 17 Divided Piece 18 Screw Member (Connecting Member) 25 Fitting Convex 26, 33 Flange Surface 27 Key 28, 35 Threaded Hole in Divided Piece 32 Fitting Recessed 40 1st male screw part 41 2nd male screw part
Claims (3)
切刃チップが取り付けられてなる切削工具であって、 上記工具本体が、当該工具本体の軸線方向に分割可能な
一対の分割片によって構成され、 これら分割片の接合端に、互いに嵌合して各分割片の径
方向への相対移動を阻止する嵌合凸部及び嵌合凹部が形
成され、 これら嵌合凸部及び嵌合凹部の周囲には、該嵌合凸部及
び嵌合凹部の全周に渡って伸び、かつ互いに密着可能な
フランジ面が形成され、 上記嵌合凸部及び嵌合凹部の間には上記分割片の周方向
への相対回転を阻止するキーが設けられ、 上記分割片の間には、これら分割片を上記工具本体の軸
線方向に着脱自在に連結する連結部材が配置されている
ことを特徴とする切削工具。1. A cutting tool in which a cutting blade tip is attached to a tip end side in the axial direction of a tool body having an axial shape, wherein the tool body is a pair of split pieces that can be split in the axial direction of the tool body. And a fitting convex portion and a fitting concave portion that are fitted to each other to prevent the relative movement of the respective divided pieces in the radial direction. Around the recess, a flange surface is formed that extends over the entire circumference of the fitting protrusion and the fitting recess and can be in close contact with each other, and the split piece is provided between the fitting protrusion and the fitting recess. Is provided with a key for preventing relative rotation of the divided pieces in the circumferential direction, and a connecting member is arranged between the divided pieces to detachably connect the divided pieces in the axial direction of the tool body. A cutting tool.
連結部材を、上記工具本体の先端面側から操作可能なネ
ジ部材としたことを特徴とする切削工具。2. The cutting tool according to claim 1, wherein the connecting member is a screw member operable from the tip end surface side of the tool body.
ネジ部材は、一端側に上記一対の分割片の一方に形成さ
れたネジ穴と螺合可能な第１の雄ねじ部を有し、他端側
に上記第１の雄ねじ部と逆方向に捻れて上記一対の分割
片の他方に形成されたネジ穴と螺合可能な第２の雄ねじ
部を有していることを特徴とする切削工具。3. The cutting tool according to claim 2, wherein the threaded member has a first male threaded portion at one end side that can be screwed into a threaded hole formed in one of the pair of divided pieces, and the other. A cutting tool having, on its end side, a second male screw portion that can be twisted in a direction opposite to the first male screw portion and screwed into a screw hole formed in the other of the pair of divided pieces. ..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP136692U JPH0588823U (en) | 1992-01-17 | 1992-01-17 | Cutting tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP136692U JPH0588823U (en) | 1992-01-17 | 1992-01-17 | Cutting tools |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0588823U true JPH0588823U (en) | 1993-12-03 |
Family
ID=11499502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP136692U Pending JPH0588823U (en) | 1992-01-17 | 1992-01-17 | Cutting tools |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0588823U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5776430A (en) * | 1980-10-31 | 1982-05-13 | Meidensha Electric Mfg Co Ltd | Eddy current dynamometer |
| JPS58177219A (en) * | 1982-03-26 | 1983-10-17 | フリ−ド・クルツプ・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング | Shell end mill |
| JPS6339713A (en) * | 1986-08-04 | 1988-02-20 | Shinko Kogyo Kk | Cutter for beveling |
-
1992
- 1992-01-17 JP JP136692U patent/JPH0588823U/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5776430A (en) * | 1980-10-31 | 1982-05-13 | Meidensha Electric Mfg Co Ltd | Eddy current dynamometer |
| JPS58177219A (en) * | 1982-03-26 | 1983-10-17 | フリ−ド・クルツプ・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング | Shell end mill |
| JPS6339713A (en) * | 1986-08-04 | 1988-02-20 | Shinko Kogyo Kk | Cutter for beveling |
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