JP7089563B2 - Chamfering method and chamfering equipment - Google Patents

Chamfering method and chamfering equipment Download PDF

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JP7089563B2
JP7089563B2 JP2020164985A JP2020164985A JP7089563B2 JP 7089563 B2 JP7089563 B2 JP 7089563B2 JP 2020164985 A JP2020164985 A JP 2020164985A JP 2020164985 A JP2020164985 A JP 2020164985A JP 7089563 B2 JP7089563 B2 JP 7089563B2
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blade
internal gear
rotating
tooth end
rotation
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裕二 新城
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Tungaloy Corp
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Description

本発明は、内歯歯車の歯端面を面取りする面取り加工方法及び面取り加工装置に関する。 The present invention relates to a chamfering method and a chamfering apparatus for chamfering the tooth end surface of an internal gear.

内歯歯車の歯溝の歯端面に残るバリなどを取り除くため、内歯歯車の歯端面を面取り加工することが行われている。 In order to remove burrs and the like remaining on the tooth end surface of the tooth groove of the internal gear, the tooth end surface of the internal gear is chamfered.

かかる内歯歯車の歯端面の面取り加工は、従来より、面取り加工用の先細りの回転工具を用いて行われている(特許文献1参照)。 The chamfering of the tooth end surface of the internal gear has been conventionally performed by using a tapered rotary tool for chamfering (see Patent Document 1).

特開平4-25318号公報Japanese Unexamined Patent Publication No. 4-25318

しかしながら、上述のような内歯歯車の歯端面の面取り加工方法は、内歯歯車の歯溝毎に、先細りの回転工具を内歯歯車の内側から歯溝に挿入し歯溝の溝方向に移動させる必要があり、回転工具の動作工程が多く複雑になるため、内歯歯車の全ての歯溝の歯端面を面取りするのに時間がかかる。 However, in the method of chamfering the tooth end surface of the internal tooth gear as described above, a tapered rotary tool is inserted into the tooth groove from the inside of the internal tooth gear and moved in the groove direction of the tooth groove for each tooth groove of the internal tooth gear. It takes time to chamfer the end faces of all the tooth grooves of the internal tooth gear because the operation process of the rotary tool is many and complicated.

本発明はかかる点に鑑みてなされたものであり、内歯歯車の歯端面の面取り加工に要する時間を短縮することができる面取り加工方法及び面取り加工装置を提供することをその目的とする。 The present invention has been made in view of this point, and an object of the present invention is to provide a chamfering method and a chamfering apparatus capable of shortening the time required for chamfering the end face of an internal gear.

本発明の一態様に係る面取り加工方法は、内歯歯車の歯端面を面取りする面取り加工方法であって、内歯歯車が歯車軸周りに回転し、刃部が、歯車軸に直角をなし回動軌跡に内歯歯車の歯端面を含む回動軸周りに回動し、当該刃部が前記内歯歯車の歯端面に接触して歯端面が面取りされる。 The chamfering method according to one aspect of the present invention is a chamfering method for chamfering the tooth end surface of the internal gear, in which the internal gear rotates around the gear axis and the blade portion rotates at right angles to the gear axis. It rotates around a rotation axis including the tooth end surface of the internal gear in the motion locus, and the blade portion comes into contact with the tooth end surface of the internal gear to chamfer the tooth end surface.

この態様によれば、内歯歯車の回転と刃部の回動により歯端面の面取りが行われるので、刃部の動作が単純になり、内歯歯車の歯端面の面取り加工に要する時間を短縮することができる According to this aspect, since the tooth end surface is chamfered by the rotation of the internal gear and the rotation of the blade, the operation of the blade is simplified and the time required for chamfering the tooth end surface of the internal gear is shortened. can do

上記態様において、内歯歯車が歯車軸周りに連続的に回転した状態で、歯端面が面取りされるようにしてもよい。 In the above embodiment, the tooth end face may be chamfered while the internal gear is continuously rotated around the gear axis.

上記態様において、内歯歯車が歯車軸周りに1回転するときに、刃部が回動軸周りに、歯数N÷刃部数A(Aは、回動軸周りの同一円周上にある刃部の数)で示される回数回動するようにしてもよい。 In the above embodiment, when the internal gear makes one rotation around the gear axis, the blade portion is around the rotation axis, and the number of teeth N ÷ the number of blade portions A (A is a blade on the same circumference around the rotation axis. It may be rotated the number of times indicated by the number of parts).

上記態様において、互いに同じ回動軸を有し、回動軸方向に並べて配置された複数の刃部を用いて歯端面が面取りされるようにしてもよい。 In the above embodiment, the tooth end faces may be chamfered by using a plurality of blades having the same rotation axes and arranged side by side in the rotation axis direction.

上記態様において、歯溝の左右の歯端面が別々の刃部で面取りされるようにしてもよい。 In the above embodiment, the left and right tooth end faces of the tooth groove may be chamfered by separate blade portions.

上記態様において、回動軸周りの同一円周上に配置された複数の刃部を用いて歯端面が面取りされるようにしてもよい。 In the above embodiment, the tooth end surface may be chamfered by using a plurality of blade portions arranged on the same circumference around the rotation axis.

上記態様において、刃部は、切削インサートであり、その切削インサートのコーナー刃、又は当該コーナー刃に連続する切れ刃の少なくともいずれかにより歯端面が面取りされるようにしてもよい。 In the above aspect, the blade portion is a cutting insert, and the tooth end surface may be chamfered by at least one of a corner blade of the cutting insert or a cutting edge continuous with the corner blade.

本発明の一態様に係る面取り加工装置は、内歯歯車の歯端面を面取りする面取り加工装置であって、刃部と、内歯歯車を歯車軸周りに回転させる回転部と、刃部を、歯車軸に直角をなし回動軌跡に内歯歯車の歯端面を含めることができる回動軸周りに回動させる回動部と、刃部を内歯歯車の歯端面に接触させる駆動部と、を備える。 The chamfering apparatus according to one aspect of the present invention is a chamfering apparatus for chamfering the tooth end surface of the internal gear, and has a blade portion, a rotating portion for rotating the internal gear around a gear axis, and a blade portion. A rotating part that rotates around a rotating shaft that is perpendicular to the gear axis and can include the tooth end surface of the internal gear in the rotation locus, and a drive part that brings the blade part into contact with the tooth end surface of the internal gear. To prepare for.

上記態様において、回動部は、刃部を保持し、回動軸周りに回転する回転体と、回転体を保持し、前記回動軸となる軸体と、を有するようにしてもよい。 In the above aspect, the rotating portion may have a rotating body that holds the blade portion and rotates around the rotating shaft, and a shaft body that holds the rotating body and serves as the rotating shaft.

上記態様において、回転体は、円盤形状を有し、回転体は、外周に形成され刃部が取り付けられる切り欠き部と、中心に軸体が挿通する貫通孔とを有するようにしてもよい。 In the above aspect, the rotating body may have a disk shape, and the rotating body may have a notch portion formed on the outer periphery and to which a blade portion is attached, and a through hole through which the shaft body is inserted in the center.

上記態様において、軸体は、複数の回転体を軸方向に並べて保持しているようにしてもよい。 In the above aspect, the shaft body may hold a plurality of rotating bodies side by side in the axial direction.

上記態様において、軸体には、隣り合う回転体の間隔を規定するスペーサが設けられていてもよい。 In the above embodiment, the shaft body may be provided with a spacer that defines the distance between adjacent rotating bodies.

上記態様において、回転体は、回動軸周りの同一円周上に複数の刃部を保持していてもよい。 In the above aspect, the rotating body may hold a plurality of blades on the same circumference around the rotation axis.

上記態様において、面取り加工装置は、内歯歯車が歯車軸周りに1回転するときに、刃部が回動軸周りに、歯数N÷刃部数A(Aは、回動軸周りの同一円周上にある刃部の数)で示される回数回動するように回転部と回動部を制御する制御部を、さらに備えるようにしてもよい。 In the above embodiment, in the chamfering apparatus, when the internal gear makes one rotation around the gear axis, the blade portion is around the rotation axis, and the number of teeth N ÷ the number of blade portions A (A is the same circle around the rotation axis). A control unit that controls the rotating portion and the rotating portion so as to rotate the number of times indicated by the number of blade portions on the circumference) may be further provided.

上記態様において、刃部は、少なくともコーナー刃と、そのコーナー刃に連続する切れ刃を有する切削インサートであってもよい。 In the above embodiment, the blade portion may be a cutting insert having at least a corner blade and a cutting edge continuous with the corner blade.

面取り加工装置の構成の概略を示す説明図である。It is explanatory drawing which shows the outline of the structure of the chamfering processing apparatus. 面取り加工装置を上方から見た説明図である。It is explanatory drawing which looked at the chamfering apparatus from above. 刃部の取り付け部を拡大した図である。It is an enlarged view of the attachment part of a blade part. 回転体を回動軸方向から見た側面図である。It is a side view which looked at the rotating body from the direction of the rotation axis. 回転体の正面図である。It is a front view of a rotating body. 図2の面取り加工装置のX-X断面図である。FIG. 2 is a cross-sectional view taken along the line XX of the chamfering apparatus of FIG. 刃部による面取り加工の様子を示す説明図である。It is explanatory drawing which shows the state of chamfering by a blade part. 面取りされた溝端面を示す説明図である。It is explanatory drawing which shows the chamfered groove end face. 回転体が一つの面取り加工装置の構成を示す説明図である。It is explanatory drawing which shows the structure of the chamfering processing apparatus with one rotating body. 2つの刃部を有する回転体の側面図である。It is a side view of the rotating body which has two blades.

以下、図面を参照して、本発明の好ましい実施の形態について説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

図1は、本実施の形態に係る面取り加工装置1の構成の概略を示す説明図である。図2は、面取り加工装置1を上方から見た説明図である。なお、本明細書において、「上」、「下」は、図1に示す面取り加工装置1の姿勢を基準とする。 FIG. 1 is an explanatory diagram showing an outline of the configuration of the chamfering apparatus 1 according to the present embodiment. FIG. 2 is an explanatory view of the chamfering apparatus 1 as viewed from above. In this specification, "upper" and "lower" are based on the posture of the chamfering apparatus 1 shown in FIG.

図1に示すように例えば面取り加工装置1は、刃部10と、内歯歯車20をその歯車軸B1周りに回転させる回転部11と、刃部10を、歯車軸B1に直角をなし回動軌跡に内歯歯車20の歯端面21を含むす回動軸B2周りに回動させる回動部12と、刃部10を内歯歯車20の歯端面21に接触させる駆動部13と、制御部14などを備えている。 As shown in FIG. 1, for example, in the chamfering apparatus 1, the blade portion 10, the rotating portion 11 that rotates the internal gear 20 around the gear shaft B1, and the blade portion 10 rotate at right angles to the gear shaft B1. A rotating portion 12 that rotates around a rotating shaft B2 that includes the tooth end surface 21 of the internal gear 20 in the locus, a drive unit 13 that brings the blade portion 10 into contact with the tooth end surface 21 of the internal gear 20, and a control unit. It is equipped with 14.

刃部10は、例えば切削インサートである。刃部10は、例えば図3に示すように6面からなる直方体形状を有している。刃部10は、例えば方形の端面30と、端面30との間で交差稜線を形成する側面31と、端面30と側面31との間の交差稜線に形成された切れ刃部32を有している。切れ刃部32は、端面30の一つの角に形成されるコーナー刃40と、コーナー刃40に連続する第1の切れ刃41及び第2の切れ刃42を少なくとも有している。コーナー刃40は、例えば45°程度のコーナー角(第1の切れ刃41と第2の切れ刃42の間のコーナー刃40の内角)を有している。 The blade portion 10 is, for example, a cutting insert. The blade portion 10 has a rectangular parallelepiped shape composed of six surfaces, for example, as shown in FIG. The blade portion 10 has, for example, a side surface 31 forming an intersecting ridge line between the rectangular end surface 30 and the end surface 30, and a cutting edge portion 32 formed on the intersecting ridge line between the end surface 30 and the side surface 31. There is. The cutting edge portion 32 has at least a corner blade 40 formed at one corner of the end face 30, a first cutting edge 41 and a second cutting edge 42 continuous with the corner blade 40. The corner blade 40 has, for example, a corner angle of about 45 ° (the internal angle of the corner blade 40 between the first cutting blade 41 and the second cutting blade 42).

図1に示すように回転部11は、例えば円筒状の内歯歯車20を歯端面21を上にした状態で保持する保持部50と、保持部50を鉛直軸(歯車軸B1)周りに回転駆動する回転駆動部51を備えている。 As shown in FIG. 1, the rotating portion 11 rotates, for example, a holding portion 50 that holds a cylindrical internal gear 20 with the tooth end surface 21 facing up, and a holding portion 50 that rotates around a vertical shaft (gear shaft B1). A rotary drive unit 51 for driving is provided.

保持部50は、例えばチャックなどの機械的手段、吸着手段、磁力による接着手段等により内歯歯車20を保持することができる。 The holding portion 50 can hold the internal gear 20 by, for example, a mechanical means such as a chuck, a suction means, an adhesive means by a magnetic force, or the like.

回転駆動部51は、例えばモータにより保持部50を回転させることができる。 The rotation drive unit 51 can rotate the holding unit 50 by, for example, a motor.

回動部12は、刃部10を保持し回動軸B2周りに回転する2つの回転体60、61と、回転体60、61を保持し回動軸B2となる軸体としてのシャフト62と、シャフト62を回転駆動する回転駆動部63と、スペーサ64を有している。 The rotating portion 12 includes two rotating bodies 60 and 61 that hold the blade portion 10 and rotate around the rotating shaft B2, and a shaft 62 as a shaft body that holds the rotating bodies 60 and 61 and becomes the rotating shaft B2. It has a rotation drive unit 63 that rotationally drives the shaft 62, and a spacer 64.

回転体60は、内歯歯車20の内側から見て歯溝22の右歯端面21の面取りを行う刃部10を保持するものであり、回転体61は、歯溝22の左歯端面21の面取りを行う刃部10を保持するものである。回転体60、61は、円盤形状を有している。回転体60、61は、例えば互いに同じ大きさで同じ外径を有している。回転体60、61は、例えば図4に示すように外周に形成された切り欠き部70と、中心に形成された貫通孔71を有している。 The rotating body 60 holds a blade portion 10 for chamfering the right tooth end surface 21 of the tooth groove 22 when viewed from the inside of the internal gear 20, and the rotating body 61 holds the left tooth end surface 21 of the tooth groove 22. It holds the blade portion 10 for chamfering. The rotating bodies 60 and 61 have a disk shape. The rotating bodies 60 and 61 have, for example, the same size and the same outer diameter as each other. The rotating bodies 60 and 61 have, for example, a notch 70 formed on the outer periphery thereof and a through hole 71 formed in the center as shown in FIG.

切り欠き部70は、回転体60、61を回動軸B2の軸方向から見て、例えば第1の外縁部80から中心Oに向かい、その後中心Oに達する前に略直角に曲がり、第1の外縁部80とは別の第2の外縁部81に到達するような切欠き端面90を有している。第1の外縁部80と中心Oを結ぶ回転体60、61の径方向の仮想線Cと、第2の外縁部81と中心Oを結ぶ回転体60、61の径方向の仮想線Dがなす内角α1は、例えば90°未満である。 The cutout portion 70 views the rotating bodies 60 and 61 from the axial direction of the rotating shaft B2, for example, from the first outer edge portion 80 toward the center O, and then bends at a substantially right angle before reaching the center O, and the first It has a notched end face 90 so as to reach a second outer edge portion 81 different from the outer edge portion 80 of the above. The radial virtual lines C of the rotating bodies 60 and 61 connecting the first outer edge portion 80 and the center O and the radial virtual lines D of the rotating bodies 60 and 61 connecting the second outer edge portion 81 and the center O form. The internal angle α1 is, for example, less than 90 °.

切欠き端面90は、回転体60、61の回動軸B2周りの回転方向Rに対し略垂直であり回転方向Rに向いた保持部91を有している。保持部91は、第1の外縁部80付近に位置する。保持部91には、刃部10がねじ等により保持される。なお、切り欠き部70は、切りくずポケットとしても機能する。 The notched end surface 90 has a holding portion 91 that is substantially perpendicular to the rotation direction R around the rotation axis B2 of the rotating bodies 60 and 61 and faces the rotation direction R. The holding portion 91 is located near the first outer edge portion 80. The blade portion 10 is held by the holding portion 91 by a screw or the like. The notch 70 also functions as a chip pocket.

例えば図1、図3及び図4に示すように回転体60、61は、刃部10を、端面30が回転体60、61の回転方向Rに向いて露出するように保持している。また、回転体60、61は、図1、図3及び図5に示すようにコーナー刃40が回転体60、61の径方向の外方に位置し、図3乃至図6に示すようにコーナー刃40が回転体60、61の第1の外縁部80(外縁)から外側に突出するように刃部10を保持している。図5に示すように回動軸B2に垂直でコーナー刃40の頂点を通る垂直面Eと第1の切れ刃41とがなす角度α2と、垂直面Eと第2の切れ刃42とがなす角度α3とが、同じ角度の例えば45°程度となっている。すなわち、第1の切れ刃41及び第2の切れ刃42は、垂直面Eに対して傾斜している。 For example, as shown in FIGS. 1, 3 and 4, the rotating bodies 60 and 61 hold the blade portion 10 so that the end face 30 is exposed in the rotation direction R of the rotating bodies 60 and 61. Further, in the rotating bodies 60 and 61, the corner blades 40 are located radially outward of the rotating bodies 60 and 61 as shown in FIGS. 1, 3 and 5, and the corners are as shown in FIGS. 3 to 6. The blade portion 10 is held so that the blade 40 projects outward from the first outer edge portion 80 (outer edge) of the rotating bodies 60 and 61. As shown in FIG. 5, the angle α2 formed by the vertical surface E passing through the apex of the corner blade 40 perpendicular to the rotation axis B2 and the first cutting edge 41, and the vertical surface E and the second cutting edge 42 form. The angle α3 is, for example, about 45 ° at the same angle. That is, the first cutting edge 41 and the second cutting edge 42 are inclined with respect to the vertical surface E.

図1に示すようにシャフト62は、回転体60、61の貫通孔71に挿通され、回転体60、61を回動軸B2の方向に並べて保持している。シャフト62は、自身が回転し、回転体60、61を回転させることで各回転体60、61の刃部10を回動軸B2周りに回動させることができる。シャフト62は、自身が内歯歯車20の歯端面21に近づくことで刃部10の回動軌跡に内歯歯車20の歯端面21を含めることができる。 As shown in FIG. 1, the shaft 62 is inserted through the through holes 71 of the rotating bodies 60 and 61, and holds the rotating bodies 60 and 61 side by side in the direction of the rotating shaft B2. The shaft 62 itself rotates, and by rotating the rotating bodies 60 and 61, the blade portion 10 of each of the rotating bodies 60 and 61 can be rotated around the rotation shaft B2. The shaft 62 itself can include the tooth end surface 21 of the internal gear 20 in the rotation locus of the blade portion 10 by approaching the tooth end surface 21 of the internal gear 20.

回転駆動部63は、例えばモータによりシャフト62を回転させることができる。 The rotation drive unit 63 can rotate the shaft 62 by, for example, a motor.

スペーサ64は、例えば円筒形状を有し、シャフト62の回転体60と回転体61の間に取り付けられている。スペーサ64の両端面は回転体60、61に当接しており、これにより、回転体60、61の間の距離が所定の距離に保たれている。 The spacer 64 has, for example, a cylindrical shape and is attached between the rotating body 60 and the rotating body 61 of the shaft 62. Both end faces of the spacer 64 are in contact with the rotating bodies 60 and 61, whereby the distance between the rotating bodies 60 and 61 is maintained at a predetermined distance.

駆動部13は、例えばシリンダであり、回転部11の保持部50を歯車軸B1方向に上下動させることができる。これにより駆動部13は、内歯歯車20の歯端面21と、回転体60、61(刃部10)との距離を調整し、刃部10を歯端面21に接触させたり離したりすることができる。なお、駆動部13は、内歯歯車20の歯端面21と刃部10を互いに進退するように相対的に移動させるものであればよく、刃部10側を移動させるものであったり、内歯歯車20の歯端面21と刃部10の両方を移動させるものであってもよい。 The drive unit 13 is, for example, a cylinder, and the holding unit 50 of the rotating unit 11 can be moved up and down in the gear shaft B1 direction. As a result, the drive unit 13 adjusts the distance between the tooth end surface 21 of the internal gear 20 and the rotating bodies 60, 61 (blade portion 10), and the blade portion 10 can be brought into contact with or separated from the tooth end surface 21. can. The drive unit 13 may be one that moves the tooth end surface 21 of the internal gear 20 and the blade portion 10 so as to move back and forth relative to each other, and may move the blade portion 10 side or the internal teeth. Both the tooth end surface 21 of the gear 20 and the blade portion 10 may be moved.

制御部14は、例えばコンピュータであり、CPUがメモリに格納された所定のプログラムを実行することにより、回転部11の回転駆動部51や回動部12の回転駆動部63、駆動部13の動作を制御することができる。 The control unit 14 is, for example, a computer, and the CPU executes a predetermined program stored in the memory to operate the rotation drive unit 51 of the rotation unit 11, the rotation drive unit 63 of the rotation unit 12, and the drive unit 13. Can be controlled.

例えば制御部14は、内歯歯車20が歯車軸B1周りに1回転するときに、刃部10が回動軸B2周りに、歯数N÷刃部数A(Aは、回動軸B2周りの同一円周上にある刃部数)で示される回数回動するように、回転部11の回転数と回動部12の回動数を制御する制御機能を有している。本実施の形態では、各回転体60、61の刃部10が1つ(A=1)であるので、内歯歯車20の回転と刃部10の回動の比は、1対Nとなる。 For example, in the control unit 14, when the internal gear 20 makes one rotation around the gear shaft B1, the blade portion 10 rotates around the rotation shaft B2, and the number of teeth N ÷ the number of blade portions A (A is around the rotation shaft B2). It has a control function for controlling the number of rotations of the rotating portion 11 and the number of rotations of the rotating portion 12 so as to rotate the number of times indicated by the number of blade portions on the same circumference). In the present embodiment, since each of the rotating bodies 60 and 61 has one blade portion 10 (A = 1), the ratio of the rotation of the internal gear 20 to the rotation of the blade portion 10 is 1: N. ..

次に、面取り加工装置1を用いた面取り加工方法について説明する。先ず、図1に示すように内歯歯車20が歯端面21を上にした状態で回転部11の保持部50に保持される。また、刃部10が取り付けられている回転体60、61がシャフト62に固定される。回転体60、61同士の間隔は、スペーサ64により調整される。 Next, a chamfering method using the chamfering apparatus 1 will be described. First, as shown in FIG. 1, the internal gear 20 is held by the holding portion 50 of the rotating portion 11 with the tooth end surface 21 facing up. Further, the rotating bodies 60 and 61 to which the blade portion 10 is attached are fixed to the shaft 62. The distance between the rotating bodies 60 and 61 is adjusted by the spacer 64.

そして、内歯歯車20は、回転駆動部51により歯車軸B1周りに回転し、回転体60、61は、回転駆動部63によるシャフト62の回転により、回動軸B2周りに回転する。これにより、各回転体60、61に取り付けている刃部10が回動軸B2周りに回動する。このときの刃部10の回動方向は、前方回動、後方回動のどちらでもよいが、例えば前方回動とする。なお、前方回動とは、端面30が向いている方向に向けた回動であり、後方回動とは、前方回動の逆方向の回動である。 Then, the internal gear 20 is rotated around the gear shaft B1 by the rotation drive unit 51, and the rotating bodies 60 and 61 are rotated around the rotation shaft B2 by the rotation of the shaft 62 by the rotation drive unit 63. As a result, the blade portion 10 attached to each of the rotating bodies 60 and 61 rotates around the rotation shaft B2. The rotation direction of the blade portion 10 at this time may be either forward rotation or backward rotation, but is, for example, forward rotation. The forward rotation is a rotation in the direction in which the end face 30 is facing, and the backward rotation is a rotation in the opposite direction of the forward rotation.

次に、駆動部13により、保持部50に保持された内歯歯車20が各回転体60、61の刃部10に近づけられ、刃部10の回動軌跡が内歯歯車20の歯端面21に 到達する。これにより、各回転体60、61の刃部10が内歯歯車20の歯端面21に接触して歯端面21を面取りする。このとき、内歯歯車20は、歯車軸B1周りに一定の速度で連続的に回転し、刃部10は、回動軸B2周りに一定の速度で連続的に回動する。内歯歯車20が歯車軸B1周りに1回転するときに、刃部10が回転軸B2周りにN回転する。つまり、内歯歯車20が歯溝22の1ピッチ分回転する間に、刃部10が1回回動し、一つの歯溝22の歯端面21が面取りされる。 Next, the drive unit 13 brings the internal gear 20 held by the holding unit 50 closer to the blade portion 10 of each of the rotating bodies 60 and 61, and the rotation locus of the blade portion 10 is the tooth end surface 21 of the internal gear 20. To reach. As a result, the blade portion 10 of each of the rotating bodies 60 and 61 comes into contact with the tooth end surface 21 of the internal gear 20 and chamfers the tooth end surface 21. At this time, the internal gear 20 continuously rotates around the gear shaft B1 at a constant speed, and the blade portion 10 continuously rotates around the rotation shaft B2 at a constant speed. When the internal gear 20 makes one rotation around the gear shaft B1, the blade portion 10 makes N rotations around the rotation shaft B2. That is, while the internal gear 20 rotates by one pitch of the tooth groove 22, the blade portion 10 rotates once, and the tooth end surface 21 of one tooth groove 22 is chamfered.

回転体60の刃部10は、内歯歯車20を内側から見て、歯溝22の右歯端面21の面取りを行い、回転体61の刃部10は、歯溝22の左歯端面21の面取りを行う。 The blade portion 10 of the rotating body 60 chamfers the right tooth end surface 21 of the tooth groove 22 when the internal gear 20 is viewed from the inside, and the blade portion 10 of the rotating body 61 is the left tooth end surface 21 of the tooth groove 22. Chamfer.

図7に示すように刃部10は、歯端面21の外周側(歯溝22の歯底側)に接触し、次第に歯端面21の内周側(歯溝22の歯先側)に接触していき、内歯歯車20の内側に貫ける。これにより、図8に示すように一つの歯溝22の歯端面21が面取りされる。なお、面取りが行われる際には、歯端面21に一定の幅の面取りが行われるように各種諸元が適宜選択されている。例えば内歯歯車20の種類や歯形(歯数、圧力角等)に応じて、回転体60、61の外径、刃部10の切れ刃40、41、42のサイズ、刃部10の歯端面21に対する切込み量、刃部10のコーナー刃40の曲率半径などが適宜選択される。 As shown in FIG. 7, the blade portion 10 contacts the outer peripheral side of the tooth end surface 21 (the tooth bottom side of the tooth groove 22) and gradually contacts the inner peripheral side of the tooth end surface 21 (the tooth tip side of the tooth groove 22). It penetrates inside the internal tooth gear 20. As a result, as shown in FIG. 8, the tooth end surface 21 of one tooth groove 22 is chamfered. When chamfering is performed, various specifications are appropriately selected so that the tooth end surface 21 is chamfered with a certain width. For example, depending on the type of internal tooth gear 20 and the tooth profile (number of teeth, pressure angle, etc.), the outer diameters of the rotating bodies 60 and 61, the sizes of the cutting edges 40, 41 and 42 of the blade portion 10, and the tooth end face of the blade portion 10 The depth of cut with respect to 21 and the radius of curvature of the corner blade 40 of the blade portion 10 are appropriately selected.

内歯歯車20が歯車軸B1周りを1回転する間に、刃部10がN回回動し、内歯歯車20の全周の歯端面21が面取りされる。なお、内歯歯車20の歯端面21の面取りは、内歯歯車20を1回転させる間にすべて行ってもよいし、複数回転させる間に行ってもよい。その後、駆動部13により内歯歯車20の歯端面21が刃部10から離され、内歯歯車20と回転体60、61の回転がそれぞれ停止される。こうして、内歯歯車20の歯端面21の面取りが終了する。 While the internal gear 20 makes one rotation around the gear shaft B1, the blade portion 10 rotates N times, and the tooth end surface 21 around the entire circumference of the internal gear 20 is chamfered. The chamfering of the tooth end surface 21 of the internal gear 20 may be performed while the internal gear 20 is rotated once, or may be performed while the internal gear 20 is rotated a plurality of times. After that, the tooth end surface 21 of the internal gear 20 is separated from the blade portion 10 by the drive unit 13, and the rotation of the internal gear 20 and the rotating bodies 60 and 61 is stopped, respectively. In this way, chamfering of the tooth end surface 21 of the internal gear 20 is completed.

本実施の形態によれば、内歯歯車20が歯車軸B1周りに回転しながら、刃部10が回動軸B2周りに回転し、当該刃部10が内歯歯車20の歯端面21に接触して歯端面21が面取りされるので、刃部10の動作が単純となり、内歯歯車20の歯端面21の面取り加工に要する時間を短縮することができる。また、小径のエンドミルでなく、大径のカッタ(回転体60)でも加工できるため、切削速度が高く、また切込みを大きくすることが可能となり、この結果、加工時間を短縮することができる。 According to the present embodiment, while the internal gear 20 rotates around the gear shaft B1, the blade portion 10 rotates around the rotation shaft B2, and the blade portion 10 comes into contact with the tooth end surface 21 of the internal gear 20. Since the tooth end surface 21 is chamfered, the operation of the blade portion 10 is simplified, and the time required for chamfering the tooth end surface 21 of the internal gear 20 can be shortened. Further, since it is possible to process with a cutter (rotating body 60) having a large diameter instead of an end mill having a small diameter, the cutting speed is high and the depth of cut can be increased, and as a result, the processing time can be shortened.

また、内歯歯車20が連続的に回転した状態で、歯端面21が面取りされるので、内歯歯車20の回転が止まることなく、歯端面21の面取り加工時間を短縮することができる。 Further, since the tooth end surface 21 is chamfered while the internal gear 20 is continuously rotated, the chamfering time of the tooth end surface 21 can be shortened without stopping the rotation of the internal gear 20.

内歯歯車20が歯車軸B1周りに1回転するときに、刃部10が回動軸B2周りに、歯数N÷刃部数A(Aは、回動軸B2周りの同一円周上にある刃部の数(本実施の形態ではA=1))で示される回数回動するので、歯端面21の面取り加工時間を効率的に短縮することができる。 When the internal gear 20 makes one rotation around the gear shaft B1, the blade portion 10 is around the rotation shaft B2, and the number of teeth N ÷ the number of blade portions A (A is on the same circumference around the rotation shaft B2). Since the rotation is performed the number of times indicated by the number of blades (A = 1 in the present embodiment), the chamfering time of the tooth end surface 21 can be efficiently shortened.

互いに同じ回動軸B2を有し、回動軸B2方向に並べて配置された2つの刃部10を用いて歯端面21が面取りされるので、歯端面21の面取り加工時間を短時間で行うことができる。 Since the tooth end surface 21 is chamfered by using two blade portions 10 having the same rotation axis B2 and arranged side by side in the rotation axis B2 direction, the chamfering time of the tooth end surface 21 can be shortened. Can be done.

歯溝22の左右の歯端面21が別々の刃部10で面取りされるので、歯溝22の左右の各歯端面21の面取りが安定的に適切に行われる。 Since the left and right tooth end surfaces 21 of the tooth groove 22 are chamfered by separate blade portions 10, chamfering of each tooth end surface 21 on the left and right of the tooth groove 22 is performed stably and appropriately.

刃部10は、切削インサートであり、その切削インサートのコーナー刃40と、当該コーナー刃40に連続する切れ刃41、42により歯端面21が面取りされるので、歯端面21の面取りが好適に行われ、面取りの形状も安定する。 The blade portion 10 is a cutting insert, and the tooth end surface 21 is chamfered by the corner blade 40 of the cutting insert and the cutting edges 41 and 42 continuous with the corner blade 40. Therefore, chamfering of the tooth end surface 21 is preferably performed. The chamfer shape is also stable.

上記実施の形態において、2つの回転体60、61を用いて内歯歯車20の歯端面21の面取りを行っていたが、2つに限られず、3つ以上の回転体を用いて内歯歯車20の歯端面21の面取りを行ってもよい。 In the above embodiment, the tooth end surface 21 of the internal gear 20 is chamfered using two rotating bodies 60 and 61, but the internal tooth gear is not limited to two and three or more rotating bodies are used. The tooth end surface 21 of 20 may be chamfered.

また、図9に示すように一つの回転体60を用いて内歯歯車20の歯端面21の面取りを行ってもよい。かかる場合、例えば初め、回転体60の刃部10は、内歯歯車20を内側から見て、歯溝22の左右の一方の歯端面21の面取りを行い、次に、歯溝22の左右の他方の歯端面21の面取りを行うようにしてもよい。 Further, as shown in FIG. 9, one rotating body 60 may be used to chamfer the tooth end surface 21 of the internal gear 20. In such a case, for example, first, the blade portion 10 of the rotating body 60 chamfers one of the left and right tooth end faces 21 of the tooth groove 22 when the internal gear 20 is viewed from the inside, and then the left and right tooth grooves 22 are chamfered. The other tooth end surface 21 may be chamfered.

以上の実施の形態において、各回転体60、61に一つの刃部10が設けられていたが、回動軸B2周りの同一円周上に複数の刃部10が設けられていてもよい。例えば図10に示すように各回転体60、61に、それぞれ2つの刃部10が設けられていてもよい。2つの刃部10は、各回転体60、61を回動軸B2方向から見て、中心Oに対する点対称となるように設けられている。かかる場合、回転体60、61の1回の回転で、刃部10による2回の面取りを行うことができるので、内歯歯車20の回転と刃部10の回動の比は、1対2N(Nは歯数)(刃部数A=2)とする。すなわち、内歯歯車20が歯溝22の2ピッチ分回転する間に、刃部10が1回転し、2つの歯溝22の歯端面21が面取りされる。こうすることにより、歯端面21の面取り加工時間をさらに短縮することができる。 In the above embodiment, one blade portion 10 is provided on each of the rotating bodies 60 and 61, but a plurality of blade portions 10 may be provided on the same circumference around the rotation shaft B2. For example, as shown in FIG. 10, each of the rotating bodies 60 and 61 may be provided with two blade portions 10. The two blade portions 10 are provided so that the rotating bodies 60 and 61 are point-symmetrical with respect to the center O when viewed from the rotation axis B2 direction. In such a case, since the chamfering can be performed twice by the blade portion 10 with one rotation of the rotating bodies 60 and 61, the ratio of the rotation of the internal gear 20 to the rotation of the blade portion 10 is 1: 2N. (N is the number of teeth) (number of blades A = 2). That is, while the internal gear 20 rotates by two pitches of the tooth groove 22, the blade portion 10 rotates once, and the tooth end faces 21 of the two tooth grooves 22 are chamfered. By doing so, the chamfering time of the tooth end surface 21 can be further shortened.

以上、添付図面を参照しながら本発明の好適な実施の形態について説明したが、本発明はかかる例に限定されない。当業者であれば、特許請求の範囲に記載された思想の範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。 Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the ideas described in the claims, and these also naturally belong to the technical scope of the present invention. It is understood that it is a thing.

例えば上記実施の形態における刃部10、回転部11、回動部12及び駆動部13等の構成はこれに限られない。また、回動部11の回転体60、61の形状や構成は別のものであってもよい。回転体60、61とシャフト62は一体成型されたものであってもよい。図4の回転体60、61が右回りの回転方向Rに回転することで、刃部10が内歯歯車20の歯端面21の径方向の外側から内側に向かって面取りするものであったが、回転体60、61が、図4の回転体60、61を左右反転した構成を有し左回りの回転方向に回転することで、刃部10が内歯歯車20の歯端面21の径方向の内側から外側に向かって面取りするものであってもよい。 For example, the configuration of the blade portion 10, the rotating portion 11, the rotating portion 12, the driving portion 13, and the like in the above embodiment is not limited to this. Further, the shapes and configurations of the rotating bodies 60 and 61 of the rotating portion 11 may be different. The rotating bodies 60, 61 and the shaft 62 may be integrally molded. By rotating the rotating bodies 60 and 61 in FIG. 4 in the clockwise rotation direction R, the blade portion 10 is chamfered from the outside to the inside of the tooth end surface 21 of the internal gear 20 in the radial direction. , Rotating bodies 60 and 61 have a configuration in which the rotating bodies 60 and 61 of FIG. 4 are inverted left and right, and rotate in the counterclockwise rotation direction so that the blade portion 10 rotates in the radial direction of the tooth end surface 21 of the internal gear 20. It may be chamfered from the inside to the outside of.

本発明は、内歯歯車の歯端面の面取り加工に要する時間を短縮することができる面取り加工方法及び面取り加工装置を提供する際に有用である。 INDUSTRIAL APPLICABILITY The present invention is useful in providing a chamfering method and a chamfering apparatus capable of shortening the time required for chamfering the tooth end surface of an internal gear.

1 面取り加工装置
10 刃部
11 回転部
12 回動部
13 駆動部
20 内歯歯車
21 溝端面
B1 歯車軸
B2 回動軸
1 Chamfering device 10 Blade part 11 Rotating part 12 Rotating part 13 Drive part 20 Internal tooth gear 21 Groove end surface B1 Gear shaft B2 Rotating shaft

Claims (10)

内歯歯車の歯端面を面取りする面取り加工方法であって、
内歯歯車が歯車軸周りに回転し、刃部が、前記歯車軸に直角をなし回動軌跡に内歯歯車の歯端面を含む回動軸周りに回動し、当該刃部が前記内歯歯車の歯端面に接触して歯端面が面取りされ、
前記内歯歯車が歯車軸周りに一定の速度で連続的に回転し、前記刃部が回動軸周りに一定速度で連続的に回動して、前記歯端面が面取りされ、
前記内歯歯車が歯車軸周りに1回転するときに、前記刃部が回動軸周りに、歯数N÷刃部数A(Aは、回動軸周りの同一円周上にある刃部の数)で示される回数回動し、
互いに同じ回動軸を有し、回動軸方向に並べて配置された複数の刃部を用いて歯端面が面取りされ
歯溝の左右の歯端面が、前記回動軸方向に並べて配置された前記複数の刃部のうちの別々の刃部で面取りされる、面取り加工方法。
It is a chamfering method for chamfering the tooth end surface of the internal gear.
The internal gear rotates around the gear axis, the blade rotates at right angles to the gear axis and around the rotation axis including the tooth end face of the internal gear in the rotation locus, and the blade rotates around the internal tooth. The tooth end face is chamfered in contact with the tooth end face of the gear,
The internal gear continuously rotates around the gear shaft at a constant speed, the blade portion continuously rotates around the rotation shaft at a constant speed, and the tooth end surface is chamfered.
When the internal gear makes one rotation around the gear axis, the blade portion rotates around the rotation axis, and the number of teeth N ÷ the number of blade portions A (A is the blade portion on the same circumference around the rotation axis. Rotate the number of times indicated by the number) ,
The tooth end faces are chamfered using a plurality of blades having the same rotation axis and arranged side by side in the rotation axis direction .
A chamfering method in which the left and right tooth end faces of a tooth groove are chamfered by different blades among the plurality of blades arranged side by side in the rotation axis direction .
回動軸周りの同一円周上に配置された複数の刃部を用いて歯端面が面取りされる、請求項1に記載の面取り加工方法。 The chamfering method according to claim 1 , wherein the tooth end surface is chamfered by using a plurality of blades arranged on the same circumference around the rotation axis. 前記刃部は、切削インサートであり、その切削インサートのコーナー刃、又は当該コーナー刃に連続する切れ刃の少なくともいずれかにより歯端面が面取りされる、請求項1又は2に記載の面取り加工方法。 The chamfering method according to claim 1 or 2 , wherein the blade portion is a cutting insert, and the tooth end surface is chamfered by at least one of a corner blade of the cutting insert and a cutting edge continuous with the corner blade. 内歯歯車の歯端面を面取りする面取り加工装置であって、
刃部と、
内歯歯車を歯車軸周りに回転させる回転部と、
刃部を、前記歯車軸に直角をなし回動軌跡に内歯歯車の歯端面を含めることができる回動軸周りに回動させる回動部と、
刃部を前記内歯歯車の歯端面に接触させる駆動部と、
前記内歯歯車を歯車軸周りに一定の速度で連続的に回転させ、前記刃部を回動軸周りに一定速度で連続的に回動させ、前記内歯歯車が歯車軸周りに1回転するときに、前記刃部が回動軸周りに、歯数N÷刃部数A(Aは、回動軸周りの同一円周上にある刃部の数)で示される回数回動するように回転部と回動部を制御する制御部と、を備え、
前記回動部は、互いに同じ回動軸を有し、回動軸方向に並べて配置された複数の刃部を有し、歯溝の左右の歯端面が、前記回動軸方向に並べて配置された前記複数の刃部のうちの別々の刃部で面取りされるように構成されている、面取り加工装置。
A chamfering device that chamfers the tooth end surface of the internal gear.
With the blade
A rotating part that rotates the internal gear around the gear axis,
A rotating portion that rotates the blade portion at a right angle to the gear shaft and around a rotating shaft that can include the tooth end surface of the internal gear in the rotation locus.
A drive unit that brings the blade part into contact with the tooth end surface of the internal gear, and
The internal gear is continuously rotated around the gear shaft at a constant speed, the blade portion is continuously rotated around the rotation shaft at a constant speed, and the internal gear makes one rotation around the gear shaft. Occasionally, the blade rotates about the rotation axis by the number of teeth N ÷ the number of blades A (A is the number of blades on the same circumference around the rotation axis). It is equipped with a control unit that controls the unit and the rotating unit.
The rotating portion has the same rotation axis and has a plurality of blade portions arranged side by side in the rotation axis direction, and the left and right tooth end faces of the tooth groove are arranged side by side in the rotation axis direction. A chamfering apparatus configured to be chamfered by different blades among the plurality of blades .
前記回動部は、
前記刃部を保持し、前記回動軸周りに回転する回転体と、
前記回転体を保持し、前記回動軸となる軸体と、を有する、請求項4に記載の面取り加工装置。
The rotating part is
A rotating body that holds the blade and rotates around the axis of rotation,
The chamfering apparatus according to claim 4 , further comprising a shaft body that holds the rotating body and serves as the rotating shaft.
前記回転体は、円盤形状を有し、
前記回転体は、外周に形成され刃部が取り付けられる切り欠き部と、中心に軸体が挿通する貫通孔とを有し、
前記切り欠き部は、第1の外縁部から回転体の中心に向かい、当該中心に達する前に略直角に曲がり、その後直線的に進んで第2の外縁部に到達する切り欠き端面を有する、請求項5に記載の面取り加工装置。
The rotating body has a disk shape and has a disk shape.
The rotating body has a notch portion formed on the outer periphery and to which a blade portion is attached, and a through hole through which the shaft body is inserted in the center.
The notch has a notch end face that goes from the first outer edge to the center of the rotating body, bends at a substantially right angle before reaching the center, and then proceeds linearly to reach the second outer edge. The chamfering apparatus according to claim 5 .
前記軸体は、複数の回転体を軸方向に並べて保持している、請求項5又は6に記載の面取り加工装置。 The chamfering apparatus according to claim 5 or 6 , wherein the shaft body holds a plurality of rotating bodies side by side in the axial direction. 前記軸体には、隣り合う回転体の間隔を規定するスペーサが設けられている、請求項7に記載の面取り加工装置。 The chamfering apparatus according to claim 7 , wherein the shaft body is provided with a spacer that defines the distance between adjacent rotating bodies. 前記回転体は、回動軸周りの同一円周上に複数の刃部を保持している、請求項4~8のいずれか一項に記載の面取り加工装置。 The chamfering apparatus according to any one of claims 4 to 8 , wherein the rotating body holds a plurality of blade portions on the same circumference around a rotation axis. 前記刃部は、少なくともコーナー刃と、そのコーナー刃に連続する切れ刃を有する切削インサートである、請求項4~9のいずれか一項に記載の面取り加工装置。 The chamfering apparatus according to any one of claims 4 to 9 , wherein the blade portion is a cutting insert having at least a corner blade and a cutting edge continuous with the corner blade.
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