JP2000126930A - Internal gear shape hard gear honing machine - Google Patents
Internal gear shape hard gear honing machineInfo
- Publication number
- JP2000126930A JP2000126930A JP10296830A JP29683098A JP2000126930A JP 2000126930 A JP2000126930 A JP 2000126930A JP 10296830 A JP10296830 A JP 10296830A JP 29683098 A JP29683098 A JP 29683098A JP 2000126930 A JP2000126930 A JP 2000126930A
- Authority
- JP
- Japan
- Prior art keywords
- work
- shaft
- internal gear
- transmission device
- grinding wheel
- 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.)
- Withdrawn
Links
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は焼入れ歯車の歯面を
内歯車形砥石を使用し高精度に仕上げるハードギヤホー
ニング盤の砥石軸及びワーク軸の回転制御に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation control of a grinding wheel shaft and a work shaft of a hard gear honing machine for finishing a tooth surface of a quenched gear with high precision using an internal gear type grinding wheel.
【０００２】[0002]
【従来の技術】図２に示すように焼入れをした外歯歯車
（ワーク）４１の歯面を仕上げる方法の１つとして外歯
車形のドレスギヤ４２により内歯車形砥石４３をドレス
成形して、この内歯形砥石をワークに噛み合わせ、ワー
ク歯車歯面を仕上げるハードギヤホーニング加工があ
る。この内歯式砥石４３によるハードギヤホーニング加
工は内歯車シェービング加工と同様、歯面間の相対的な
横すべり力を利用して加工される。ダイヤモンド砥粒な
どの硬質砥粒でワークと同一諸元の歯部を被膜されたド
レスギヤ４２を図２に示すようにヘッドストック４４と
テールストック４５の両センタ間に挟持して内歯車砥石
軸心４３ａと、ある軸交差角をもって回転させながら内
歯車形砥石の歯面を押し当ててドレッシングすることに
よりドレスギヤの歯面を内歯車形砥石の歯面に転写す
る。2. Description of the Related Art As one of the methods for finishing the tooth surface of a hardened external gear (work) 41 as shown in FIG. 2, an internal gear type grindstone 43 is dressed by an external gear type dress gear 42, and this is formed. There is a hard gear honing process that meshes an internal gear wheel with a work and finishes the work gear tooth surface. The hard gear honing using the internal toothed grindstone 43 is performed by using a relative lateral sliding force between the tooth surfaces, similarly to the internal gear shaving. As shown in FIG. 2, a dress gear 42 coated with hard abrasive grains such as diamond abrasive grains having the same specifications as the workpiece is sandwiched between both centers of a head stock 44 and a tail stock 45, and an inner gear wheel shaft center. The tooth surface of the dress gear is transferred to the tooth surface of the internal gear-type grindstone by pressing and dressing the tooth surface of the internal gear-type grindstone while rotating at 43a and a certain axis crossing angle.
【０００３】ついで、ドレッシングされた内歯式砥石４
３の歯面をワークである熱処理後の外歯車４１をドレッ
シング時と同様にヘッドストック４４とテールストック
４２の両センタ間に挟持して外歯車の歯面に内歯式砥石
を軸交差角をもって回転させながら押し当てることによ
り内歯式砥石の歯面の形状をワーク歯面に転写するよう
にして仕上げ加工をおこなうようにしたものである。ド
レッシング時、ワーク加工時ともに内歯車形砥石側は駆
動モータ４６およびスプロケットチェーンにより減速さ
れて強制駆動されるが、ドレスギヤ４２及びワーク４１
はそれぞれ内歯車形砥石４３との噛み合いによって従動
して回転され、いわゆるつれ回り状態となる。[0003] Next, the dressed internal tooth type grinding wheel 4
The toothed surface of No. 3 is heat-treated, and the external gear 41 after heat treatment is sandwiched between the centers of the head stock 44 and the tail stock 42 in the same manner as in dressing, and the tooth surface of the external gear is provided with an internal tooth type grinding wheel with an axis crossing angle. By performing the pressing while rotating, the finish processing is performed by transferring the shape of the tooth surface of the internal tooth type grinding stone to the work tooth surface. In both dressing and work processing, the internal gear type grindstone is reduced in speed by the drive motor 46 and the sprocket chain and is forcibly driven.
Are driven to rotate by engagement with the internal gear type grindstone 43, respectively, so that a so-called swirling state is achieved.
【０００４】ところで、回転数が一定の場合はつれ回り
状態であっても内歯車形砥石、ドレスギヤやワーク等の
歯面にかかる面圧は比較的安定している。しかしなが
ら、回転加速時、減速時等においては、大きな面圧がか
かり、砥石面の破損や、歯面精度の劣化が生じるおそれ
があった。最近では、加工時の砥石軸の回転数は１００
０ｒｐｍから２０００ｒｐｍと高速化が要求され、さら
に、サイクルタイムの短縮要求も強まっており、従来と
同様の加減速時間で、１回の加速又は減速における回転
数の変化量が大きくなっているため、噛み合い歯面の負
荷が増大し、歯面の損傷が大きくなるという問題があっ
た。一方、本出願人が出願した特開平９−５７６２４号
公報では砥石軸の回転数として１００ｒｐｍ程度で行わ
れるドレスギヤによるドレッシングの場合は、砥石軸と
ワーク軸にそれぞれモータを設け、内歯車形砥石とドレ
スギヤの噛み合い位置合わせ後、ドレス回転開始時から
ドレス回転停止時までのドレッシング工程全域に渡って
内歯車形砥石とドレスギヤとを同期回転させた。By the way, when the rotation speed is constant, the surface pressure applied to the tooth surfaces of the internal gear-type grindstone, the dress gear, the work, and the like is relatively stable even in the case of the swirling state. However, during rotation acceleration, deceleration, and the like, a large surface pressure is applied, and there is a possibility that the grinding wheel surface is damaged and the tooth surface accuracy is deteriorated. Recently, the rotation speed of the grinding wheel shaft during processing is 100
Higher speed is required from 0 rpm to 2000 rpm, and furthermore, the demand for shortening the cycle time is also increasing, and the amount of change in the number of revolutions in one acceleration or deceleration is increased with the same acceleration / deceleration time as before. There is a problem that the load on the meshing tooth surface increases, and the tooth surface damage is increased. On the other hand, in Japanese Patent Application Laid-Open No. 9-57624 filed by the present applicant, in the case of dressing by a dress gear performed at a rotation speed of a grinding wheel shaft of about 100 rpm, motors are provided on the grinding wheel shaft and the work shaft respectively, and an internal gear type grinding wheel is provided. After the meshing position of the dress gear was adjusted, the internal gear-type grindstone and the dress gear were synchronously rotated over the entire dressing process from the start of the dress rotation to the stop of the dress rotation.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、同期回
転させるためにはサーボモータを使用し、高価な同期制
御装置を必要とし、コスト高であった。さらに、ワーク
加工時には、加工前の悪い精度をもつワークと高精度内
歯車砥石とを電気的に同期回転させ、同時に切込を与え
ると噛み合い誤差によって大きな加工振動を発生し却っ
て加工精度が劣化することがあるので、ワーク軸とワー
ク軸用モータとを切断するクラッチを設け同期運転を行
わないようにしていた。また、ワーク加工時の加減速時
にも同期運転ができなかった。However, in order to perform synchronous rotation, a servomotor is used, an expensive synchronous control device is required, and the cost is high. Furthermore, when machining a workpiece, the workpiece with poor precision before machining and the high-precision internal gear grindstone are electrically synchronously rotated, and if a cut is given at the same time, a large machining vibration is generated due to a meshing error, thereby deteriorating the machining precision. Therefore, a clutch for disconnecting the work shaft and the motor for the work shaft is provided so that the synchronous operation is not performed. Also, synchronous operation could not be performed during acceleration or deceleration during work processing.
【０００６】本発明の課題は、上記問題点に鑑みて、加
減速時の噛み合い歯面の負荷の増大を押さえ、砥石歯面
の損傷を極力軽減させながら、ワーク加工時を含めて高
速回転による加工能率の向上と、高加減速によるサイク
ルタイムの短縮とを可能にし、砥石寿命の延長による刃
具費低減も可能となる内歯車形ハードギヤホーニング盤
を提供することである。SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to suppress an increase in the load on the meshing tooth surface during acceleration and deceleration and to minimize damage to the tooth surface of the grinding wheel while reducing the speed of rotation at high speeds even when machining a workpiece. It is an object of the present invention to provide an internal gear type hard gear honing machine capable of improving the machining efficiency and shortening the cycle time by high acceleration / deceleration, and reducing the cutting tool cost by extending the life of the grindstone.
【０００７】[0007]
【課題を解決するための手段】本発明においては、熱処
理後の外歯式歯車のワークに対して、該ワークとほぼ同
一諸元を有する外歯式のドレスギヤに内接して成形され
た内歯車形砥石によって、その歯面仕上げをおこなうハ
ードギヤホーニング盤において、内歯車形砥石が取り付
けられる砥石軸を駆動する駆動モータと、ワーク等が取
り付けられるワーク軸と、ワーク軸に出力軸が接続され
たトルク伝達装置と、トルク伝達装置の入力軸に接続さ
れたアシストモータと、内歯車形砥石とワーク等がほぼ
同期回転可能に駆動モータとアシストモータの回転数を
それぞれ制御する制御手段と、を設けた内歯車形ハード
ギヤホーニング盤を提供することによって上記課題を解
決した。According to the present invention, an internal gear formed by inscribing an externally toothed dress gear having substantially the same specifications as a workpiece of an externally toothed gear after heat treatment. In a hard gear honing machine that finishes its tooth surface by means of a shaped whetstone, a drive motor for driving a whetstone shaft to which an internal gear-shaped whetstone is mounted, a work shaft to which a work is mounted, and an output shaft connected to the work shaft A torque transmission device, an assist motor connected to the input shaft of the torque transmission device, and control means for controlling the rotation speeds of the drive motor and the assist motor so that the internal gear-type grindstone and the work and the like can be rotated substantially synchronously are provided. The above problem has been solved by providing an internal gear type hard gear honing machine.
【０００８】ここで、アシストモータは、回転する砥石
軸に対してワーク軸を独立してほぼ同期駆動させるため
の補助モータであり、砥石軸モータと同種のものでよ
い。また、トルク伝達装置は、例えば摩擦式、流体式、
電磁式に見られるパウダ式、空隙式等のクラッチ・ブレ
ーキや、入力軸と出力軸間を永久磁石の磁力によりトル
ク伝達させる磁力式トルク伝達（制御）装置のように、
出力軸の負荷トルクに応じて入力軸と出力軸との間で、
スリップさせ伝達トルクを制御する装置をいう。Here, the assist motor is an auxiliary motor for independently and substantially synchronously driving the work shaft with respect to the rotating grindstone shaft, and may be of the same type as the grindstone shaft motor. Further, the torque transmission device is, for example, a friction type, a fluid type,
Like the magnetic type torque transmission (control) device that transmits torque between the input shaft and the output shaft by the magnetic force of the permanent magnet,
Between the input shaft and the output shaft according to the load torque of the output shaft,
A device that controls the transmission torque by slipping.
【０００９】かかる構成によれば、内歯車形砥石とワー
ク等はほぼ同期回転するようにそれぞれ制御される。そ
れぞれの回転数の誤差により、内歯車砥石とワーク等間
に負荷トルクが発生する。このトルクはワーク軸とアシ
ストモータ間に取り付けられたトルク伝達装置でアシス
トモータとワーク軸間をスリップ状態にさせ、内歯車形
砥石及びワーク等間の回転誤差を吸収する。このため歯
車面圧が過大とならない。即ち、本発明においては、内
歯車形砥石の回転によってワーク等が歯面面圧が過大と
なるつれ回り状態にならないようにワーク回転をアシス
トモータでアシスト（補助、支援、援助等）するととも
に、トルク伝達装置で駆動モータとアシストモータの回
転誤差を吸収するのである。According to this configuration, the internal gear type grindstone, the work and the like are controlled so as to rotate substantially synchronously. A load torque is generated between the internal gear whetstone and the work or the like due to errors in the respective rotation speeds. This torque causes a slipping state between the assist motor and the work shaft by a torque transmission device attached between the work shaft and the assist motor, thereby absorbing a rotation error between the internal gear type grinding wheel, the work, and the like. For this reason, the gear surface pressure does not become excessive. That is, in the present invention, the work rotation is assisted by the assist motor (assist, assist, assist, etc.) so that the work, etc., does not enter a state in which the tooth surface pressure becomes excessive due to the rotation of the internal gear type grindstone. The torque transmission device absorbs rotation errors between the drive motor and the assist motor.
【００１０】ドレス時、ワーク加工時の回転速度や切り
込み量等の加工条件は異なる。ドレス加工時の砥石回転
数は５０〜１５０ｒｐｍであり、加減速度が小さく発生
する砥石とドレスギヤ間の負荷も十分小さく、回数も少
ない。これに対し、ワーク加工時では砥石回転数は１０
００〜２０００ｒｐｍであり、加減速度が大きく、加工
回数もドレス回数より格段に多い。従って、ワーク加工
時における加減速度の負荷トルクに応じたトルク伝達装
置でもよい。そこで、請求項２おいては、トルク伝達装
置を外部の制御装置が不要で伝達軸間を永久磁石の磁力
でもって結合するようにされた定トルク伝達装置とし
た。[0010] Processing conditions such as the rotation speed and the cutting depth during dressing and work processing are different. The number of rotations of the grindstone during dressing is 50 to 150 rpm, and the load between the grindstone and the dress gear that generates a small acceleration / deceleration is sufficiently small and the number of times is small. On the other hand, the grindstone rotation speed is 10
The rotation speed is 00 to 2000 rpm, the acceleration / deceleration is large, and the number of times of processing is much larger than the number of dresses. Therefore, a torque transmission device according to the load torque of the acceleration / deceleration at the time of processing the workpiece may be used. Therefore, in claim 2, the torque transmission device is a constant torque transmission device in which an external control device is not required and the transmission shafts are coupled with the magnetic force of a permanent magnet.
【００１１】なお、駆動モータとアシストモータの回転
数は互いにトルクが過大にならない範囲で制御される。
万一、断線や誤動作等により著しい回転数誤差が生じた
場合はアシストモータとワーク間は所定のトルク以上で
スリップするヒステリシスタイプのトルク特性をもつも
のが好ましい。スリップし始めるときのトルクをできる
限り小さくすれば、断線や誤動作等の異常時の損傷も小
さくなる。また、加減速時ばかりでなく、加工中の定回
転時において、内歯車形砥石とワークの噛み合い誤差に
よる振動の発生も押さえられるので、各モータの回転数
の制御範囲に応じて低めに設定するとよい。なお、砥石
軸とワーク軸の回転数は１：１ではなく、砥石の内歯数
とワークの外歯数の比によって決まるのはいうまでもな
い。The rotation speeds of the drive motor and the assist motor are controlled within a range in which the torque does not become excessive.
If a remarkable rotational speed error occurs due to disconnection, malfunction, or the like, it is preferable that the assist motor and the work have a hysteresis type torque characteristic of slipping at a predetermined torque or more. If the torque at the time of starting to slip is made as small as possible, damage at the time of abnormality such as disconnection or malfunction is also reduced. Also, not only during acceleration / deceleration, but also at the time of constant rotation during machining, the occurrence of vibration due to the meshing error between the internal gear type grindstone and the work can be suppressed, so if it is set lower according to the control range of the rotation speed of each motor, Good. It is needless to say that the number of rotations of the grindstone shaft and the work shaft is not 1: 1, but is determined by the ratio of the number of internal teeth of the grindstone to the number of external teeth of the work.
【００１２】さらに、アシストモータの回転数、伝達ト
ルクを制御することにより各ワーク条件に対して最適の
アシスト状態を設定できる。例えば、正転状態で、駆動
モータ側よりアシストモータ側の回転を遅くすれば、ワ
ーク側が幾分つれ回り状態となり、従来の正転時に負荷
を受ける面側が負荷を受けるようにでき、さらには伝達
トルクを制御することによりこの面圧を調整できる。逆
に、駆動モータ側よりアシストモータ側の回転を早くす
れば、内歯車形砥石側がつれ回り状態となり、上記とは
逆の面の加工、さらには面圧を調整することもできる。
さらに、これを利用して従来、正転逆転をして歯面の両
面の加工条件を合わせるように操作していたが、駆動モ
ータ側に対しアシストモータ側の回転を早くしたり遅く
したりすれば、正逆転の操作と同様の効果が得られ、回
転方向をかえる必要がなくなり、サイクルタイムが短縮
される場合もある。Further, by controlling the rotation speed and the transmission torque of the assist motor, an optimum assist state can be set for each work condition. For example, if the rotation of the assist motor side is made slower than that of the drive motor side in the normal rotation state, the work side becomes slightly twisted, and the surface side receiving the load during the conventional normal rotation can receive the load. This surface pressure can be adjusted by controlling the torque. Conversely, if the rotation of the assist motor side is made faster than that of the drive motor side, the internal gear type grindstone side will be in a rotating state, and it is also possible to process the surface opposite to the above and further adjust the surface pressure.
Furthermore, using this, conventionally, the operation was performed so as to match the processing conditions on both sides of the tooth surface by performing normal rotation and reverse rotation, but if the rotation of the assist motor side is made faster or slower than the drive motor side For example, the same effect as the forward / reverse operation can be obtained, and it is not necessary to change the rotation direction, and the cycle time may be shortened.
【００１３】[0013]
【発明の実施の形態】本発明の実施の形態について、図
面を参照して説明すると、図１は本発明の内歯車形ギヤ
ホーニング盤のワーク軸を構成するヘッドストックの部
分断面図、図２は内歯車形砥石が取り付けられる砥石ヘ
ッド付近の斜視図である。図２に示すように内歯車形砥
石４３は砥石ヘッド４７に装着され、砥石軸用の駆動モ
ータ４６の回転駆動力がチェーン４８が掛けられた駆動
側スプロケット４９，砥石軸側スプロケット５０を介し
て伝達されている。ワーク等４１，４２はワーク軸を構
成するセンター又は図示しないワークアーバで挟持さ
れ、ワークはセンター又はワークアーバを介して図１に
示すヘッドストック軸３に回転方向及び軸方向ともに固
定して取り付けられる。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partial sectional view of a headstock constituting a work shaft of an internal gear type gear honing machine of the present invention, and FIG. FIG. 3 is a perspective view of the vicinity of a grindstone head to which an internal gear type grindstone is attached. As shown in FIG. 2, the internal gear-type grindstone 43 is mounted on a grindstone head 47, and the rotational driving force of a drive motor 46 for the grindstone shaft is applied via a drive sprocket 49 and a grindstone shaft sprocket 50 to which a chain 48 is applied. Has been communicated. The works 41, 42 are sandwiched by a center or a work arbor (not shown) constituting a work shaft, and the work is fixedly attached to the headstock shaft 3 shown in FIG. 1 in both the rotation direction and the axial direction via the center or the work arbor. .
【００１４】図１に示すようにヘッドストック本体１
（４４）に多数の軸受２で支承されたヘッドストック軸
３が設けられている。ヘッドストック軸３の反ワーク側
軸端３ａがトルク伝達装置４のケースをかねた出力軸５
の端面５ａに継ぎ手７を介して接続され、トルク伝達装
置の入力軸６がカップリング８に接続され、さらに、カ
ップリングを介してアシストモータ軸９ａに一直線上に
配置接続されている。アシストモータ９はブラケット１
０を介してテールストック本体１の反ワーク側面１ａに
固定されている。[0014] As shown in FIG.
At (44), a headstock shaft 3 supported by a number of bearings 2 is provided. An output shaft 5 in which a shaft end 3a of the headstock shaft 3 opposite to the work side serves as a case of the torque transmitting device 4.
Of the torque transmitting device is connected to the coupling 8, and further connected to the assist motor shaft 9a in a straight line via the coupling. Assist motor 9 is bracket 1
0, it is fixed to the side surface 1a of the tailstock body 1 opposite to the work.
【００１５】駆動モータ４６及びアシストモータ９はＡ
Ｃスピンドルモータであり、それぞれ図示しない制御機
器により回転数制御ができるようにされている。また、
制御機器は内歯車形砥石とワーク等がほぼ同期回転可能
になるように駆動モータとアシストモータの回転数を制
御できるようにされるが、２台のモータの回転速度を比
較して制御する必要はなく、一台ずつ一般に制御できる
範囲で回転制御できればよい。The drive motor 46 and the assist motor 9 are A
These are C spindle motors, each of which can control the rotation speed by a control device (not shown). Also,
The control equipment can control the rotation speed of the drive motor and the assist motor so that the internal gear type grinding wheel and the work etc. can be rotated almost synchronously, but it is necessary to control by comparing the rotation speed of the two motors It is only necessary that the rotation can be controlled within a range that can be generally controlled one by one.
【００１６】トルク伝達装置４は、例えば通称パーマト
ルクと呼ばれ株式会社工進精工所で製作されたものを用
いた場合について説明する。このトルク伝達装置４は、
図３の（ａ）に示すようにケース５内に永久磁石２１，
２２を磁極が外方に向かうように対向させて配置し、そ
の中間に入力軸６に連結された回転円板６ａが設けら
れ、入力軸は軸受２３を介して回転自在にされている。
前述したように、ケース５は出力軸として使用されケー
ス端部５ａのねじ穴５ｂを用いて継ぎ手７の一端がボル
トで固定され、さらに継ぎ手７の他端がヘッドストック
軸３に結合されている。A description will be given of a case where the torque transmitting device 4 is, for example, a so-called perm torque, which is manufactured by Kosin Seiko Co., Ltd. This torque transmission device 4
As shown in FIG. 3A, the permanent magnets 21 and
A rotating disk 6 a connected to the input shaft 6 is provided in the middle of the rotating disk 22. The input shaft is rotatable via a bearing 23.
As described above, the case 5 is used as an output shaft, one end of the joint 7 is fixed with a bolt using the screw hole 5b of the case end 5a, and the other end of the joint 7 is connected to the headstock shaft 3. .
【００１７】このトルク伝達装置４は入力軸６と一体に
された回転円板６ａが回転すると磁石２１，２２間にあ
る無数の磁力線が回転円板の回転をさまたげるように抵
抗力が働く。従って、入力軸６の回転トルクは発生する
抵抗力によってケース５に伝達される。この抵抗力は図
３の（ｂ）、（ｃ）に示すように相対する磁石２１，２
２の相対位置を変化させることによって調整可能にされ
ている。図３の（ｂ）のように相対する磁極が異なる場
合に最小トルクとなり、（ｃ）のように相対する磁極が
同じになる場合に最大トルクが発生する。入力軸６とケ
ース５間の抵抗力が入力軸とケース間のトルク差より小
さくなると入力軸とケース間にスリップが発生し、入力
軸とケース間で抵抗力以上のトルクが伝達されないよう
にし、さらに、スリップ回転数（入力軸とケース間の回
転数の差）が変化しても伝達トルクが変わらないヒステ
リシスタイプのトルク伝達装置である。なお、ワーク軸
（アシストモータ）の回転トルクが１４０ｋｇｆ・ｃｍ
程度の場合には、トルク伝達装置のスリップトルクは、
１／３〜１／５程度に設定するとよい。本発明の実施例
では１．２〜３２ｋｇｆ・ｃｍ（０．１２〜３．２Ｎ・
ｍ）の調整範囲のものを使用した。In this torque transmitting device 4, when the rotating disk 6a integrated with the input shaft 6 rotates, a resistance force acts so that the myriad lines of magnetic force between the magnets 21 and 22 hinder the rotation of the rotating disk. Therefore, the rotational torque of the input shaft 6 is transmitted to the case 5 by the generated resistance. As shown in FIGS. 3B and 3C, this resistance force is applied to the opposed magnets 21 and
2 can be adjusted by changing the relative position. As shown in FIG. 3B, the minimum torque is generated when the opposite magnetic poles are different, and the maximum torque is generated when the opposite magnetic poles are the same as shown in FIG. 3C. When the resistance between the input shaft 6 and the case 5 becomes smaller than the torque difference between the input shaft and the case, a slip occurs between the input shaft and the case, so that torque exceeding the resistance is not transmitted between the input shaft and the case. Further, this is a hysteresis type torque transmission device in which the transmission torque does not change even when the slip rotation speed (difference in rotation speed between the input shaft and the case) changes. The rotation torque of the work shaft (assist motor) is 140 kgf · cm.
In this case, the slip torque of the torque transmitting device is
It may be set to about 1/3 to 1/5. In the embodiment of the present invention, 1.2 to 32 kgf · cm (0.12 to 3.2 N ·
The one having the adjustment range of m) was used.
【００１８】かかる構成において、ワーク加工を例にそ
の作用を述べると、まず、内歯車形砥石軸４３ａがテー
ルストック３とヘッドストックの軸心にほぼ一致するよ
うに砥石軸を動かして、さらに、所定の軸交差角で固定
し、ワーク４１をワーク軸を構成するテールストックと
ヘッドストック間にワークが自由回転できないように挟
持する。次に砥石軸用駆動モータ４６又はアシストモー
タ９を微小回転させ内歯車形砥石４３の歯底とワーク４
１の歯先がほぼ一致するようにして、砥石軸４３ａとワ
ーク軸（ヘッドストック軸）との軸間距離を縮めワーク
の歯の歯面を内歯車形砥石の歯面にゼロバックラッシュ
の状態に押し当てトルク伝達装置の抵抗に抗して位相あ
わせを行う。In such a configuration, the operation will be described by taking a work as an example. First, the grinding wheel shaft is moved so that the internal gear type grinding wheel shaft 43a substantially coincides with the axis of the tail stock 3 and the head stock. The work 41 is fixed at a predetermined axis crossing angle, and the work 41 is sandwiched between a tail stock and a head stock constituting a work axis so that the work cannot freely rotate. Next, the drive motor 46 or the assist motor 9 for the grindstone shaft is slightly rotated to rotate the tooth bottom of the internal gear type grindstone 43 and the work 4.
A state where the tooth tip of the work 1 is substantially coincident with that of the grinding wheel shaft 43a and the work shaft (headstock shaft) and the tooth surface of the work tooth is zero-backlashed to the tooth surface of the internal gear type grinding wheel. The phase is adjusted against the resistance of the torque transmission device.
【００１９】次いで、アシストモータ側が遅めにほぼ同
期するように駆動モータ４６、アシストモータ９に回転
指令を与えて内歯車形砥石４３とワーク４１を正転回転
させ、加速し所定の最大回転数、若しくは加速途中の設
定された回転数に達した後、軸間距離を徐々に短くして
ワークの負荷を受ける面側の歯面の所定の加工を行う。
加工完了後、両モータをアシストモータ側が遅めにほぼ
同期するように減速、逆転、加速し、前述したと同様
に、今度は反対側の歯面の所定の加工を行い、減速停止
してワークの加工を完了する。加減速時にワークがアシ
スト（つれ回りによる回転力を減殺する方向に回転力が
補われる）され、回転誤差をトルク伝達装置４のスリッ
プによって吸収するので、歯車形砥石４３とワーク４１
との面圧が過大になることがない。Next, a rotation command is given to the drive motor 46 and the assist motor 9 so that the assist motor side is almost synchronized with the delay, so that the internal gear type grindstone 43 and the work 41 are rotated forward, accelerated, and accelerated to a predetermined maximum rotational speed. Alternatively, after reaching the set number of revolutions during acceleration, the center distance is gradually shortened to perform predetermined machining of the tooth surface on the side receiving the load of the work.
After the machining is completed, both motors are decelerated, reversed, and accelerated so that the assist motor side is almost synchronized later.As described above, predetermined machining is performed on the tooth surface on the opposite side, and the workpiece is decelerated and stopped. Complete the processing of During acceleration / deceleration, the work is assisted (rotational force is compensated for in a direction to reduce the rotational force due to the twisting), and the rotation error is absorbed by the slip of the torque transmission device 4.
Surface pressure does not become excessive.
【００２０】[0020]
【発明の効果】本発明においては、内歯車形砥石回転用
の駆動モータと、ワーク等回転用のアシストモータと、
ワークとアシストモータ間にトルク伝達装置を設け、駆
動モータとアシストモータをほぼ同期する回転数で回転
させるようにし、内歯車形砥石の回転によってワーク等
が歯面面圧が過大となるようなつれ回り状態にならない
ようにワーク回転をアシストモータでアシストするとと
もに、トルク伝達装置で駆動モータとアシストモータの
回転誤差を吸収するようにしたので、歯面の負荷増大を
押さえ、砥石歯面の損傷を極力軽減させ、かつ、例えば
砥石回転数で２０００ｒｐｍ等の高速回転、高加減速が
可能となり、加工能率が良く、加工サイクルタイムが短
い内歯車形ハードギヤホーニング盤を提供するものとな
った。さらには加工精度が安定し、砥石寿命が長くなる
ので、ドレスインターバルが長くなり刃具費の低減等が
可能となった。According to the present invention, a drive motor for rotating an internal gear type grinding wheel, an assist motor for rotating a workpiece or the like,
A torque transmission device is provided between the work and the assist motor, so that the drive motor and the assist motor are rotated at a rotational speed that is substantially synchronized, and the rotation of the internal gear-shaped grindstone causes the work or the like to have excessive tooth surface pressure. The work rotation is assisted by the assist motor to prevent the rotation state, and the torque transmission device absorbs the rotation error between the drive motor and the assist motor. An internal gear type hard gear honing machine which can reduce rotation as much as possible, and can perform high-speed rotation such as 2000 rpm at a grindstone rotation speed and high acceleration / deceleration, has a high processing efficiency, and has a short processing cycle time. Further, since the processing accuracy is stabilized and the life of the grindstone is prolonged, the dress interval is lengthened, and the cutting tool cost can be reduced.
【００２１】また、トルク伝達装置を外部の制御装置の
不要な伝達軸間を永久磁石の磁力で結合するようにされ
た定トルク伝達装置としたので、構造が簡単、取扱いが
容易、コスト効率のより高いものとなった。Further, since the torque transmission device is a constant torque transmission device in which the unnecessary transmission shafts of the external control device are connected by the magnetic force of the permanent magnet, the structure is simple, easy to handle, and cost effective. Became higher.
【図１】本発明の内歯車形ギヤホーニング盤のワーク軸
を構成するヘッドストックの部分断面図である。FIG. 1 is a partial sectional view of a headstock constituting a work shaft of an internal gear type gear honing machine of the present invention.
【図２】内歯車形ギヤホーニング盤の内歯車形砥石が取
り付けられる砥石ヘッド付近の斜視図である。FIG. 2 is a perspective view of the vicinity of a grinding wheel head to which an internal gear type grinding wheel of the internal gear type gear honing machine is attached.
【図３】本発明の実施例において用いたトルク伝達装置
の（ａ）は部分断面図、（ｂ）、（ｃ）は作動原理図で
ある。FIG. 3A is a partial cross-sectional view of the torque transmission device used in the embodiment of the present invention, and FIGS. 3B and 3C are operation principle diagrams.
４ トルク伝達装置 ５ 出力軸 ６ 入力軸 ９ アシストモータ ２１、２２ 永久磁石 ４１ ワーク ４１ａ ワーク軸 ４２ ドレスギヤ ４３ 内歯車形砥石 ４３ａ 砥石軸 ４６ 駆動モータ Reference Signs List 4 Torque transmission device 5 Output shaft 6 Input shaft 9 Assist motor 21, 22 Permanent magnet 41 Work 41a Work shaft 42 Dress gear 43 Internal gear type grindstone 43a Grindstone shaft 46 Drive motor
Claims (2)
て、該ワークとほぼ同一諸元を有する外歯式のドレスギ
ヤに内接して成形された内歯車形砥石によって、その歯
面仕上げをおこなうハードギヤホーニング盤において、
前記内歯車形砥石が取り付けられる砥石軸を駆動する駆
動モータと、前記ワーク等が取り付けられるワーク軸
と、該ワーク軸に出力軸が接続されたトルク伝達装置
と、該トルク伝達装置の入力軸に接続されたアシストモ
ータと、前記内歯車形砥石と前記ワーク等がほぼ同期回
転可能に前記駆動モータと前記アシストモータの回転数
をそれぞれ制御する制御手段と、を有することを特徴と
する内歯車形ハードギヤホーニング盤。1. A tooth surface finish of a work of an external gear after heat treatment is finished by an internal gear type grindstone formed in contact with an external gear dress gear having substantially the same specifications as the work. In the hard gear honing machine to perform,
A drive motor for driving a grindstone shaft to which the internal gear type grindstone is attached, a work shaft to which the work or the like is attached, a torque transmission device having an output shaft connected to the work shaft, and an input shaft of the torque transmission device. A connected assist motor, and control means for controlling the rotation speeds of the drive motor and the assist motor so that the internal gear-type grindstone, the work, and the like can be rotated substantially synchronously, wherein Hard gear honing machine.
石の磁力で結合するようにされた定トルク伝達装置であ
ることを特徴とする請求項１記載の内歯車形ハードギヤ
ホーニング盤。2. The internal gear type hard gear honing machine according to claim 1, wherein the torque transmission device is a constant torque transmission device configured to couple between transmission shafts by a magnetic force of a permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10296830A JP2000126930A (en) | 1998-10-19 | 1998-10-19 | Internal gear shape hard gear honing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10296830A JP2000126930A (en) | 1998-10-19 | 1998-10-19 | Internal gear shape hard gear honing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000126930A true JP2000126930A (en) | 2000-05-09 |
Family
ID=17838720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10296830A Withdrawn JP2000126930A (en) | 1998-10-19 | 1998-10-19 | Internal gear shape hard gear honing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000126930A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008114305A (en) * | 2006-10-31 | 2008-05-22 | Seiwa Tekko Kk | Gear honing method and device |
-
1998
- 1998-10-19 JP JP10296830A patent/JP2000126930A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008114305A (en) * | 2006-10-31 | 2008-05-22 | Seiwa Tekko Kk | Gear honing method and device |
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