JPH03184719A - Pinion cutter for hourglass worm correction gear cutting - Google Patents
Pinion cutter for hourglass worm correction gear cuttingInfo
- Publication number
- JPH03184719A JPH03184719A JP32386489A JP32386489A JPH03184719A JP H03184719 A JPH03184719 A JP H03184719A JP 32386489 A JP32386489 A JP 32386489A JP 32386489 A JP32386489 A JP 32386489A JP H03184719 A JPH03184719 A JP H03184719A
- Authority
- JP
- Japan
- Prior art keywords
- worm
- teeth
- pinion cutter
- worm wheel
- blade
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000003801 milling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Gear Processing (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は小型で高出力が得られる鼓形ウオーム減速機に
おける鼓形ウオーム修正加工用ピニオンカッターに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pinion cutter for modifying a hand-shaped worm in a small-sized, high-output hand-shaped worm reducer.
(従来技術)
従来の鼓形ウオームとして、例えば特公昭62−199
70号公報(公知例1という)のものがしられている。(Prior art) As a conventional drum-shaped worm, for example,
No. 70 (referred to as Publication Example 1) is known.
この公報記載の発明においては、ウオームの歯切りは、
第4図に示すようにして行われる。In the invention described in this publication, the gear cutting of the worm is
This is done as shown in FIG.
すなわち、ウオーム軸1に対する歯切用の回転砥石2に
、形成しようとする鼓形ウオーム3と噛合うウオームホ
イール4が行うのと同様の運動を与えることにより、ウ
オーム軸1の要所に、鼓形の外形を呈する螺旋歯5を刻
設している。That is, by applying a motion similar to that performed by the worm wheel 4 that meshes with the drum-shaped worm 3 to be formed to the gear-cutting rotary grindstone 2 relative to the worm shaft 1, the drum is formed at key points on the worm shaft 1. A spiral tooth 5 having a shape of a shape is carved.
換言すれば、ウオーム軸上の↓回転当たり、ウオームホ
イール4の歯形のピッチPに相当する送りを、ウオーム
ホイール4のピッチ円6上において回転砥石2による切
削面7に与える。なお、Oはウオームホイール4の回転
中心であり、回転砥石2は切削面7の断面形状が偏平円
錐形である。In other words, per ↓ rotation on the worm shaft, a feed corresponding to the pitch P of the tooth profile of the worm wheel 4 is applied to the cutting surface 7 by the rotary grindstone 2 on the pitch circle 6 of the worm wheel 4. Note that O is the rotation center of the worm wheel 4, and the cutting surface 7 of the rotary grindstone 2 has a cross-sectional shape of a flat cone.
このようにして歯切りされたウオーム3を創生する工具
でウオームホイールを歯切りすると、相手側のウオーム
ホイールには、偏平円錐形工具の一部が歯面としてあら
れれる。When a worm wheel is geared with the tool that creates the worm 3 that has been geared in this manner, a part of the flat conical tool appears as a tooth surface on the other wormwheel.
このようにして得られた鼓形ウオームは、筒状のウオー
ムに比して噛み合い歯数が多いので各歯の荷重負担が小
さく、大きな負荷に耐えることができる。The drum-shaped worm thus obtained has a larger number of meshing teeth than a cylindrical worm, so the load on each tooth is small and can withstand a large load.
この歯切法において歯切時の軸間隔りと、実際にウオー
ムホイール4とが噛合ったときの軸間隔Qを正確に一致
させた場合には、理論的には噛合の一部に全面当接状態
(べたあたり)が得られる。In this gear cutting method, if the axial spacing at the time of gear cutting and the axial spacing Q when the worm wheel 4 actually meshes are made to exactly match, theoretically the entire surface will be applied to a part of the meshing. A contact state (solid contact) can be obtained.
しかし、この全面当接が得られる条件は、歯形輪でいう
限界法線を作る条件を満足したときであって、通常のハ
イポイドギアにおいても、この法線を避けるように歯面
ば設計される。すなわち、この法線を持つ点は、歯面の
特異点であって、歯面に数学的な不連続を与えてしまう
。However, the condition for obtaining this full-surface contact is when the condition for creating a critical normal line in a toothed ring is satisfied, and even in a normal hypoid gear, the tooth surfaces are designed to avoid this normal line. In other words, a point with this normal line is a singular point on the tooth surface and gives a mathematical discontinuity to the tooth surface.
ヒンドレーウォームギアでは、限界法線を持った点が全
面当接する点であり、かつホイールの歯面に稜線(エツ
ジ)の噛み合い限界を作る点でもある。In a Hindley worm gear, the point with the limit normal is the point where the entire surface contacts, and it is also the point that creates the meshing limit of the ridge line (edge) on the tooth surface of the wheel.
上記鼓形ウオームギアにおいては、加工時と実際のウオ
ームホイールの噛合時の軸間隔党等の関係位置の誤差や
変化によって、限界法線を超えた逃げ側の部分に、不都
合な歯当りが生じる。In the above-mentioned drum-shaped worm gear, due to errors or changes in related positions such as the shaft spacing during processing and when the worm wheels are actually engaged, undesirable tooth contact occurs on the relief side beyond the limit normal.
そこでウオームの外形が鼓形をなすウオーム減速装置に
おいて、円錐形回転工具によってウオームを歯切りする
際の軸間距離りを、噛み合い軸間距離2より若干大きく
し、かつ歯切り減速比を噛み合い減速比より若干大きく
することにより、上記問題点を解決したものが実開昭6
4−25551号公報(公知例2という)に開示されて
いる(第5図)。Therefore, in a worm reduction device in which the outer shape of the worm is drum-shaped, the distance between the shafts when gearing the worm with a conical rotary tool is made slightly larger than the distance between the meshing shafts 2, and the gear cutting reduction ratio is set to match the gear cutting ratio. The one that solved the above problem by making it slightly larger than the ratio was the 6th Utility Model.
It is disclosed in Japanese Patent No. 4-25551 (referred to as Publication Example 2) (FIG. 5).
第5図でウオーム3は工具旋回中心Qを中心として旋回
する円錐形回転工具2、例えば、回転砥石や回転フライ
ス等の歯切工具により歯切りされる。この旋回運動と切
削時のウオームの回転運動の回転比を減速比のように表
現してjとする。qはホイールの噛み合い時の回転中心
で、噛み合い時のウオームホイール4の減速比をiとす
る。In FIG. 5, the worm 3 is gear-cut by a conical rotary tool 2 rotating around a tool rotation center Q, such as a gear cutting tool such as a rotary grindstone or a rotary milling cutter. The rotation ratio between this turning motion and the rotational motion of the worm during cutting is expressed like a reduction ratio and is expressed as j. q is the rotation center when the wheels are engaged, and i is the reduction ratio of the worm wheel 4 when the wheels are engaged.
ウオーム3の歯切時の軸間路ILおよび歯切減速比jは
、噛み合い軸間距離氾および減速比iより若干大きくな
っている。The intershaft path IL and the gear cutting reduction ratio j of the worm 3 during gear cutting are slightly larger than the meshing intershaft distance and the reduction ratio i.
この公知例2に係るウオーム3は、それと噛合うウオー
ムホイール4との軸間路Myより若干大きい軸間路il
Lをもって、かつウオームホイールの歯数より1個以上
歯数の多い減速比をもって、第4図に示す従来の歯切手
段により、先端を円錐面とした円錐形回転工具で歯切さ
れる。The worm 3 according to the known example 2 has an interaxial path il slightly larger than an interaxial path My with the worm wheel 4 that meshes with the worm 3.
L, and with a reduction ratio having one or more more teeth than the number of teeth of the worm wheel, gears are cut using a conical rotary tool with a conical tip at the tip by a conventional gear cutting means shown in FIG.
このようにウオームの歯切り軸間距離及び減速比を、ウ
オームホイールの噛合時のそれらと相違させたことによ
り、歯面に不連続部を作ることがなく、軸間隔の誤差の
許容範囲が広く、組み立ても容易になり、かつ、各歯に
負荷を等分に分担させることができること1組み立て初
期に若干の歯当りの不整があっても、摩耗によって、歯
面に不連続面を作らないため、歯当りがなじみ易いこと
、及び歯に対する油廻りが良く、摩耗にも強くなるとい
う利点がある。By making the distance between the worm gear cutting axes and the reduction ratio different from those when the worm wheel is engaged in this way, there is no discontinuity on the tooth surface, and the tolerance range for errors in the axial spacing is wide. , It is easier to assemble, and the load can be distributed equally to each tooth. 1. Even if there is some irregularity in tooth contact at the initial stage of assembly, discontinuous surfaces will not be created on the tooth surface due to wear. It has the advantage of being easy to fit into the teeth, having good oil circulation around the teeth, and being resistant to abrasion.
(発明が解決しようとする課題)
しかし上述した公知歯切り法は、加工能率の面からみる
と左程能率が上がらない。本発明はこれをさらに改良し
、加工能率をさらに上げ得る加工法を提供することを課
題とする。(Problems to be Solved by the Invention) However, the above-mentioned known gear cutting method does not improve efficiency as much as it does from the viewpoint of machining efficiency. An object of the present invention is to further improve this and provide a processing method that can further increase processing efficiency.
(課題を解決するための手段)
ピニオンカッターを用い、ウオームねじを切る際の軸間
距離をウオームと噛合うウオームホイールと等しいピッ
チを有し、かつ歯数が1枚以上多い仮想ウオームホイー
ルにウオームが噛合したときの軸間距離に等しくした鼓
形ウオームギヤのウォームねじ修正加工方法に於いて、
ピニオンカッターのブレードが工具軸に垂直な平面内に
あって、ウオームと噛合うウオームホイールと等しいピ
ッチを有し、かつ歯数が1枚以上多い仮想ホイール歯数
に等しくした。(Means for solving the problem) When cutting a worm thread using a pinion cutter, the distance between the axes is set to a virtual worm wheel that has the same pitch as the worm wheel that meshes with the worm and has one or more teeth. In the method of modifying the worm thread of an hourglass-shaped worm gear, the distance between the shafts is equal to the distance when the two are engaged,
The blade of the pinion cutter is in a plane perpendicular to the tool axis, has the same pitch as the worm wheel meshing with the worm, and has one or more teeth equal to the number of teeth of the virtual wheel.
又上記の方法で、ピニオンカッターのブレードの歯数が
ウオームホイールの整数分の1で、ピッチが整数倍にな
るよう配置した。Further, in the above method, the number of teeth of the blade of the pinion cutter was an integer fraction of that of the worm wheel, and the pitch was arranged to be an integer multiple.
さらに前記ブレードを工具軸を軸とするヘリコイドに配
設した。Further, the blade was arranged in a helicoid having the tool axis as its axis.
(実施例)
上述した第5図で説明した鼓形ウオームの修正ねじ切り
方法では、歯切時の軸間距1iLと減速比、jを、ウオ
ームと噛合するウオームホイールと等しいピッチを有し
、かつ歯数が1枚以上多い仮想ウオームホイール4′に
ウオームが噛合したときとの軸間距離りと減速比aにそ
れぞれ等しくしであるものと与えた。(Example) In the modified thread cutting method for an hourglass-shaped worm explained in FIG. It is assumed that the distance between the shafts and the reduction ratio a when the worms are engaged with the virtual worm wheels 4', which are one or more in number, are equal to each other.
そこでこの工具軸に垂直な平面A内にjxt(t;ウオ
ーム条数)枚の仮想歯車と同ピツチで、その歯数に等し
いかあるいは整数分の1の歯数及び整数倍のピッチで、
ブレードの切刃がA平面内に在るようにブレード直線切
刃を配置した(第3図参照)。Therefore, in the plane A perpendicular to this tool axis, jxt (t; number of worm gears) virtual gears have the same pitch, the number of teeth is equal to the number of teeth, or the number of teeth is a fraction of an integer, and the pitch is a multiple of an integer.
The straight cutting edge of the blade was arranged so that the cutting edge of the blade was within plane A (see Figure 3).
この際、このブレードの切れ刃は工具軸に垂直な平面A
上になくとも良い。即ち、工具軸を軸とするヘリコイド
に構成する様に配しても良い(第1図及び第2図参照)
。At this time, the cutting edge of this blade is a plane A perpendicular to the tool axis.
It doesn't have to be on top. That is, they may be arranged to form a helicoid with the tool axis as the axis (see Figures 1 and 2).
.
この様なピニオンカッターをウオーム軸1よりLの所に
配し、ウオーム軸との速比が−となる様にピニオンカッ
ターを回転すれば、ウオーム軸1に取付けられたブラン
クにウォームねじを創成する事が出来る。その速度は従
来のフライスカッターによる加工速度の数倍となる。If such a pinion cutter is placed at a position L from the worm shaft 1 and the pinion cutter is rotated so that the speed ratio with the worm shaft becomes -, a worm thread will be created in the blank attached to the worm shaft 1. I can do things. The speed is several times that of a conventional milling cutter.
(効果)
ピニオンカッターのブレードが工具軸に垂直な平面内に
あって、ウオームと噛合うウオームホイールと等しいピ
ッチを有し、かつ歯数が(枚以上多い仮想ホイール歯数
に等しく、或いはピニオンカッターのブレードの歯数が
ウオームホイールの整数分の1で、ピッチが整数倍に配
設した。(Effect) The blade of the pinion cutter is in a plane perpendicular to the tool axis, has the same pitch as the worm wheel that meshes with the worm, and the number of teeth is equal to the number of virtual wheel teeth (more than The number of teeth of the blade is an integer fraction of that of the worm wheel, and the pitch is arranged in an integer multiple.
このようしこ従来の如きフライス切りでむく、ピニオン
カッター化したので、極めて高能率に鼓形ウオームを加
工することが可能となった。By using a pinion cutter instead of the conventional milling method, it became possible to process the hourglass-shaped worm with extremely high efficiency.
第1図は工具軸に対し工具をヘリコイド状に配設したピ
ニオンカッター
第2図は第1図の下面図。
第3図(a)は工具軸に垂直な同一平面上に工具切刃を
配したピニオンカッター
第3図(b)は同じく断面図。
第4図は従来の円錐工具を用いたねじ切り法の説明図。
第5図は同しく円錐工具を用いたウォームねじ修正歯切
り方法の説明図。
図において:
1 ウオーム軸 2 回転砥石
3 鼓形ウオーム 4 ウオームホイール4′ 仮
想ウオームホイール
5 螺旋歯 6 ピッチ円
7 切削面
以上FIG. 1 is a pinion cutter in which the tool is arranged in a helicoidal manner with respect to the tool shaft. FIG. 2 is a bottom view of FIG. 1. FIG. 3(a) is a pinion cutter in which the tool cutting edge is arranged on the same plane perpendicular to the tool axis. FIG. 3(b) is a sectional view as well. FIG. 4 is an explanatory diagram of a thread cutting method using a conventional conical tool. FIG. 5 is an explanatory diagram of a worm thread correction gear cutting method using a conical tool. In the figure: 1 Worm shaft 2 Rotating grindstone 3 Drum-shaped worm 4 Worm wheel 4' Virtual worm wheel 5 Spiral tooth 6 Pitch circle 7 Above the cutting surface
Claims (3)
の軸間距離をウォームと噛合うウォームホイールと等し
いピッチを有し、かつ歯数が1枚以上多い仮想ウォーム
ホイールにウォームが噛合したときの軸間距離に等しく
した鼓形ウォームギヤのウォームねじ修正加工方法に於
いて、ピニオンカッターのブレードが工具軸に垂直な平
面内にあって、ウォームと噛合うウォームホイールと等
しいピッチを有し、かつ歯数が1枚以上多い仮想ホイー
ル歯数に等しくしたことを特徴とする鼓形ウォーム修正
歯切用ピニオンカッター。(1) When cutting a worm thread using a pinion cutter, the axis when the worm meshes with a virtual worm wheel that has the same pitch as the worm wheel that meshes with the worm and has one or more teeth In the method for modifying the worm thread of an hourglass-shaped worm gear, the blade of the pinion cutter is in a plane perpendicular to the tool axis, has the same pitch as the worm wheel that meshes with the worm, and has the same number of teeth. is equal to the number of virtual wheel teeth which is one or more teeth.
イールの整数分の1で、ピッチが整数倍に配置したこと
を特徴とする請求項(1)記載の鼓形ウォーム修正歯切
用ピニオンカッター。(2) The pinion cutter for gear cutting with an hourglass-shaped worm correction according to claim (1), wherein the number of teeth of the blade of the pinion cutter is an integral fraction of that of the worm wheel, and the pitch is arranged at an integral multiple.
たことを特徴とする請求項(1)又は(2)記載の鼓形
ウォーム修正歯切用ピニオンカッター。(3) The pinion cutter for gear cutting with an hourglass-shaped worm correction according to claim 1 or 2, characterized in that the blade is arranged in a helicoid whose axis is the tool shaft.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32386489A JPH03184719A (en) | 1989-12-15 | 1989-12-15 | Pinion cutter for hourglass worm correction gear cutting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32386489A JPH03184719A (en) | 1989-12-15 | 1989-12-15 | Pinion cutter for hourglass worm correction gear cutting |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03184719A true JPH03184719A (en) | 1991-08-12 |
Family
ID=18159443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP32386489A Pending JPH03184719A (en) | 1989-12-15 | 1989-12-15 | Pinion cutter for hourglass worm correction gear cutting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03184719A (en) |
-
1989
- 1989-12-15 JP JP32386489A patent/JPH03184719A/en active Pending
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