JP3494349B2 - Helical gear manufacturing method - Google Patents
Helical gear manufacturing methodInfo
- Publication number
- JP3494349B2 JP3494349B2 JP10983898A JP10983898A JP3494349B2 JP 3494349 B2 JP3494349 B2 JP 3494349B2 JP 10983898 A JP10983898 A JP 10983898A JP 10983898 A JP10983898 A JP 10983898A JP 3494349 B2 JP3494349 B2 JP 3494349B2
- Authority
- JP
- Japan
- Prior art keywords
- tooth
- tooth profile
- die
- helical gear
- profile
- 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.)
- Expired - Fee Related
Links
Landscapes
- Forging (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は寸法精度の高いヘリ
カルギヤの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a helical gear having high dimensional accuracy.
【０００２】[0002]
【従来の技術】ヘリカルギヤを製造するには、工具を利
用して歯形を切削加工する方法と、塑性変形させる方法
とがある。切削加工は古くから実施されているポピュラ
ーな方法であるが、時間がかかって効率が悪い。それに
対して塑性加工は効率がよいので、量産に適する。塑性
加工には代表的なものとして転造手段と鍛造手段とがあ
って、鍛造手段は転造手段に比べて高い加圧力を作用さ
せることができるので、成形はほんの一瞬で完了する。
又鍛造手段は、熱間鍛造と冷間鍛造とに大きく分けるこ
とができるが、そのうちの冷間鍛造は高い歯形精度を得
るには理想である。2. Description of the Related Art To manufacture a helical gear, there are a method of cutting a tooth profile using a tool and a method of plastically deforming it. Cutting is a popular method that has been practiced for a long time, but it takes time and is inefficient. On the other hand, plastic working is efficient and suitable for mass production. The plastic working includes rolling means and forging means as typical ones, and the forging means can apply a higher pressing force than the rolling means, so that the forming is completed only in an instant.
The forging means can be roughly divided into hot forging and cold forging, but cold forging is ideal for obtaining high tooth profile accuracy.
【０００３】[0003]
【発明が解決しようとする課題】ワークを、製造せんと
するヘリカルギヤの歯形に対応した歯形形成用歯型を有
したダイ内に押し込み、ワークの周面に歯形を形成した
とする。これが据え込み加工の場合であると、潰される
ことでその分丈が低くなり、又、脱型後には経時変化を
起こすため、図７の（ａ）に示す歯筋は、同じく図７の
（ｂ）に例示するように、加圧方向に対してねじれ角度
が大きくなってしまい、而も、応力分布は据え込みの始
めと終わりで異なるため、図７の（ｃ）に示すように、
形成された歯形には、歯型に押しつけられる面の前端と
その反対面の後端に欠肉部１８，１８が生じてしまう。
又、絞り又は押し出し加工であると、しごかれることで
前記とは逆に丈が高くなるから、図８の（ａ）に示す歯
筋は、同じく図８の（ｂ）に示すように加圧方向に対す
るねじれ角度が小さくなってしまい、形成された歯形に
は、歯型に押しつけられる面と反対の面の前端に欠肉部
１８’を生じさせてしまう不具合が起こる。これが従
来、冷間鍛造によって精度の高いヘリカル歯車の製品化
を阻む原因となっている。しかしその反面、鍛造手段、
特に冷間鍛造により形成された歯車はメタルフローが切
断されないので機械的強度が高く、品質的には切削より
優れた製品を得る上において断然有利である。鍛造手段
では前記のように欠肉部を生ずる欠点があるが、欠肉部
が生ずることを前提に考えれば、欠肉部を効果的に利用
して歯形の精度アップを図る手段が必ずあるはずであ
る。It is assumed that the work is pushed into a die having a tooth profile forming tooth profile corresponding to the tooth profile of the helical gear to be manufactured, and the tooth profile is formed on the peripheral surface of the work. If this is the case of upsetting, the length is reduced by being crushed and changes over time after demolding. Therefore, the tooth trace shown in (a) of FIG. As illustrated in b), the twist angle becomes large with respect to the pressing direction, and since the stress distribution is different at the beginning and the end of upsetting, as shown in (c) of FIG.
The formed tooth profile has flesh portions 18, 18 at the front end of the surface pressed against the tooth profile and the rear end of the opposite surface.
Further, in the case of drawing or extruding, since the height is increased by being squeezed, the tooth trace shown in (a) of FIG. 8 is added as shown in (b) of FIG. The twist angle with respect to the pressure direction becomes small, and the formed tooth profile has a defect that a recessed portion 18 ′ is formed at the front end of the surface opposite to the surface pressed against the tooth profile. This has been a cause of hindering commercialization of highly accurate helical gears by cold forging. However, on the other hand, forging means,
In particular, a gear formed by cold forging has a high mechanical strength because the metal flow is not cut, and is extremely advantageous in obtaining a product superior in quality to cutting. Although the forging means has a drawback that it produces a wall thickness portion as described above, there must always be a means for effectively utilizing the wall thickness portion to improve the accuracy of the tooth profile, assuming that the wall thickness portion will occur. Is.
【０００４】[0004]
【課題を解決するための手段】本発明は、鍛造手段によ
り形成される歯形の精度アップを目的としたヘリカルギ
ヤの製造方法であって、その構成は、製造せんとするヘ
リカルギヤにおける歯形の歯厚寸法より幅広く、加圧方
向に対してねじれ角度が小さい歯形形成用歯型を備えた
ダイにて据え込み加工した後、製造せんとするヘリカル
ギヤにおける歯歯形の歯厚寸法とねじれ角度とが合致し
た歯形整形用歯型を備えたダイにて、歯形の歯面を整形
すること、及び、製造せんとするヘリカルギヤにおける
歯形の歯厚寸法より幅広く、加圧方向に対してねじれ角
度が大きい歯形形成用歯型を備えたダイにて絞り又は押
し出し加工をした後、製造せんとするヘリカルギヤにお
ける歯形の歯厚寸法とねじれ角度とが合致した歯形整形
用歯型を備えたダイにて、歯形の歯面を整形することを
特徴とすることとにある。SUMMARY OF THE INVENTION The present invention is a method of manufacturing a helical gear for the purpose of improving the accuracy of a tooth profile formed by forging means, the structure of which is the tooth thickness dimension of the tooth profile of the helical gear to be manufactured. A tooth profile in which the tooth thickness of the tooth profile of the helical gear to be manufactured is the same as that of the tooth profile after upsetting with a die that has a wider profile and a tooth profile forming tooth profile with a smaller twist angle with respect to the pressing direction. A tooth with a shaping tooth profile is used to shape the tooth surface of a tooth profile, and a tooth profile forming tooth that is wider than the tooth thickness dimension of the tooth profile of the helical gear to be manufactured and has a large twist angle in the pressing direction. After drawing or extruding with a die equipped with a die, a die equipped with a tooth profile shaping tooth die in which the tooth thickness dimension of the tooth profile and the helix angle of the helical gear to be manufactured match At lies in the fact characterized by shaping the tooth surface of the tooth.
【０００５】[0005]
【発明の実施の形態】本発明に係るヘリカルギヤの製造
方法を、先ず据え込み加工する場合につき図面に基づい
て説明する。図１及び図２の各（ａ）において、１は第
一のダイ、２は第一のパンチ、３は素材、又４は第二の
ダイ、５は第二のパンチである。素材３は、大小２枚の
円盤を上下に重ね、その中心に軸挿通孔を設けたドーナ
ツ形状で、前記第一のダイ１及び第二のダイ４には、そ
れぞれ素材３を製品化するに必要な二段のキャビティ
６，７が形成されている。キャビティ６，７の中央には
それぞれマンドレル８，８が貫設され、底部には、前記
各マンドレル８の周囲を囲んだ状態でそのマンドレル８
沿ってキャビティ６，７内にそれぞれ出没動作するエジ
ェクタ９が設けられている。前記キャビティ６における
大径部の周囲にはヘリカル歯形形成用の歯型１０，１０
・・が周設されており、それらの歯型１０，１０・・
は、製造せんとするヘリカルギヤにおける歯形の歯厚寸
法より幅広く、而も加圧方向に対してねじれ角度が小さ
く形成されている。一方キャビティ７には、製造せんと
するヘリカルギヤの歯形に、歯厚とねじれ角度とが合致
した歯型１１，１１・・が形成されている。尚、前記素
材３は、製造せんとする歯形のＰＣＤより小径で、製品
より厚く設定されている。BEST MODE FOR CARRYING OUT THE INVENTION A method of manufacturing a helical gear according to the present invention will be described with reference to the drawings in the case of upsetting. In each (a) of FIGS. 1 and 2, 1 is a first die, 2 is a first punch, 3 is a material, 4 is a second die, and 5 is a second punch. The material 3 is a donut shape in which two large and small discs are vertically stacked and a shaft insertion hole is provided in the center thereof, and the material 3 is commercialized for each of the first die 1 and the second die 4. The required two-stage cavities 6 and 7 are formed. Mandrels 8 and 8 are respectively provided in the centers of the cavities 6 and 7, and the mandrels 8 are surrounded by the mandrels 8 at the bottom.
Ejectors 9 are provided along the cavities 6 and 7 so as to move in and out respectively. Around the large-diameter portion of the cavity 6, a tooth mold 10 for forming a helical tooth profile is formed.
.. are provided circumferentially, and the tooth molds 10, 10, ...
Is wider than the tooth thickness of the tooth profile of the helical gear to be manufactured, and has a small twist angle with respect to the pressing direction. On the other hand, in the cavity 7, tooth profiles 11, 11 ... In which the tooth thickness and the helix angle match are formed on the tooth profile of the helical gear to be manufactured. The material 3 has a smaller diameter than the tooth-shaped PCD to be manufactured and is thicker than the product.
【０００６】素材３を先ず第一のダイ１にセットし、第
一のパンチ２で加圧すると、素材３は歯型の傾斜面に誘
導されて回転しながらキャビティ６内に押し込まれ、そ
の押し込み動作に伴って素材３の周囲にはヘリカル歯形
１２，１２・・が張り出し形成される（図１のｂ）。こ
のヘリカル歯形１２，１２・・は、図３に示すように、
製造せんとする歯形の歯厚寸法より広く、歯面１３（点
線にて示す）のねじれ角度は大きく形成され、歯型に押
し付けられる面の前端とその反対面の後端とに欠肉部１
４，１４が生ずる。尚、前記第一のダイ１は、欠肉の最
も多い部分が所望する歯形の歯面とほぼ一致するよう
に、予め計算の上、設計されている。When the material 3 is first set in the first die 1 and pressed by the first punch 2, the material 3 is guided by the inclined surface of the tooth mold and pushed into the cavity 6 while rotating, and the pushing is performed. Along with the operation, helical tooth profiles 12, 12, ... Are formed over the material 3 (b in FIG. 1). As shown in FIG. 3, the helical tooth profiles 12, 12, ...
The tooth profile 13 is wider than the tooth thickness of the tooth profile to be manufactured, and the twist angle of the tooth surface 13 (shown by a dotted line) is formed to be large.
4,14 occur. The first die 1 is preliminarily calculated and designed so that the portion with the most flesh thickness substantially matches the tooth surface of the desired tooth profile.
【０００７】そこで次に、前記第一のダイ１にて周囲に
ヘリカル歯形１２，１２・・が形成された予備成形品１
５を、第二のダイ４にセットして第二のパンチ５で加圧
すると、所望歯形の傾斜を有した歯型１１により、余分
な部分が削ぎ取られるように歯面が整形され（図２の
ｂ）、図３に示すような所望形状に極めて忠実な歯形１
６，１６・・を有した完成品１７が得られるのである
（図４）。Then, next, a preform 1 having helical tooth profiles 12, 12, ... Formed around the first die 1 is formed.
When 5 is set in the second die 4 and pressed by the second punch 5, the tooth surface 11 is shaped by the tooth mold 11 having the desired tooth profile inclination so that an excessive portion is scraped off (see FIG. 2b), a tooth profile 1 that is extremely faithful to the desired shape as shown in FIG.
A finished product 17 having 6, 16 ... Is obtained (Fig. 4).
【０００８】因みに実施例の場合、鍛造工程を二回繰り
返しただけで、最新の設備を駆使して切削加工により製
造された歯車と同等、或いはそれ以上の精度であった。
従って実用上においては、第一のダイによる据え込み工
程と第二のダイによる整形工程との二工程のみで充分で
あるが、両工程の間に中間工程を付加したり、後加工よ
り研磨して、精度アップすることを否定するものではな
い。尚、前記二工程のみにて形成された歯形は、クラウ
ニングを施した歯型に極めて近く、クラウニングが必要
な歯車にとっては、むしろその形状を有効に利用するこ
とが望ましい。By the way, in the case of the embodiment, the precision was equal to or better than that of the gear manufactured by cutting using the latest equipment by merely repeating the forging process twice.
Therefore, in practice, only two steps, the upsetting step with the first die and the shaping step with the second die, are sufficient, but an intermediate step is added between both steps, or polishing is performed after the post-processing. Therefore, there is no denying that accuracy is improved. The tooth profile formed by only the above two steps is very close to the crowned tooth profile, and it is desirable to effectively utilize the shape for a gear that requires crowning.
【０００９】前記据え込み加工では、据え込みすること
によって素材は薄くなるよう変形し、歯形の傾斜は加圧
方向に対して大きくなるよう変形するが、絞り、或いは
押し出し加工では逆に厚くなるよう変形し、歯形のねじ
れ角度は加圧方向に対して小さくなる。よって絞り或い
は押し出し加工する場合は、前記据え込み加工と同じよ
うに歯形形成用歯型のねじれ角度を、製造せんとする歯
形よりねじれ角度を小さく形成すると逆の結果を招いて
しまうので、次に絞り加工の場合につき、前記図１及び
図２を利用して説明する。絞り加工の場合、素材３の径
は製造せんとする歯形のＰＣＤより大径で、キャビティ
６に周設されているヘリカル歯形形成用の歯型１０，１
０・・は、製造せんとするヘリカルギヤにおける歯形の
歯厚寸法より幅広く、歯面１３のねじれ角度が大きく形
成され、一方キャビティ７には、前記と同様に製造せん
とするヘリカルギヤの歯形に合致した歯型１１，１１・
・が形成されている。In the upsetting, the material is deformed to be thin by upsetting, and the inclination of the tooth profile is deformed to be large with respect to the pressing direction, but it is thicker in the drawing or extrusion processing. It deforms, and the twist angle of the tooth profile becomes smaller with respect to the pressing direction. Therefore, in the case of drawing or extruding, if the twist angle of the tooth profile forming tooth profile is made smaller than that of the tooth profile to be manufactured, the opposite result will occur, as in the upsetting process. The case of drawing will be described with reference to FIGS. 1 and 2. In the case of drawing, the diameter of the material 3 is larger than that of the PCD of the tooth profile to be manufactured, and the tooth profile 10, 1 for forming the helical tooth profile is provided around the cavity 6.
0 ... is wider than the tooth thickness dimension of the tooth profile of the helical gear to be manufactured, and the twist angle of the tooth surface 13 is formed large, while the cavity 7 matches the tooth profile of the helical gear to be manufactured in the same manner as described above. Tooth mold 11,11 ・
・ Is formed.
【００１０】素材３を第二のパンチ２で加圧すると、素
材３は歯型８の傾斜面に誘導され、回転しながらキャビ
ティ７内に押し込まれ、押し込み動作に伴って素材３の
周囲にはヘリカル歯形１２，１２・・が成形される。こ
のヘリカル歯形１２は、図５に示すように、所望する歯
形の歯厚寸法より広く、歯面１３の加圧方向に対するね
じれ角度は大きいが、歯型に押し付けられる面と反対面
の前端に欠肉部１４’が生じている。この場合も第一の
ダイ１は、欠肉の最も多い部分が、所望する歯形の歯面
とほぼ一致するよう、計算の上で設計されている。When the raw material 3 is pressed by the second punch 2, the raw material 3 is guided by the inclined surface of the tooth mold 8 and is pushed into the cavity 7 while being rotated. The helical tooth profiles 12, 12, ... Are formed. As shown in FIG. 5, this helical tooth profile 12 is wider than the desired tooth profile dimension, and has a large twist angle with respect to the pressing direction of the tooth surface 13, but is not cut at the front end opposite to the surface pressed against the tooth profile. The meat part 14 'is generated. In this case as well, the first die 1 is computationally designed such that the portion with the most deficiency is substantially coincident with the tooth surface of the desired tooth profile.
【００１１】続いて第二のダイ４にセットし、第二のパ
ンチ５で加圧することにより、形成しようとする歯形の
歯面と同じねじれ角度を有した歯型１１によって、余分
な部分が削ぎ取られるように歯面が整形され、前記実施
例と同様に、製造せんとする形状に極めて忠実な歯形１
６が形成される（図６）。押し出し加工も同様である。Subsequently, the second die 4 is set and the second punch 5 pressurizes the tooth die 11 having the same twist angle as the tooth surface of the tooth profile to be formed, so that the excess portion is scraped off. The tooth surface is shaped so as to be taken, and the tooth profile 1 that is extremely faithful to the shape to be manufactured is similar to the above embodiment.
6 is formed (FIG. 6). The same applies to extrusion processing.
【００１２】これら二つの実施例とも、ねじれ角度の異
なるダイによる二工程の冷間鍛造で精度の高い歯車を、
均一した品質にて供給できるので、大量生産には絶好で
ある。尚、第一のダイにて形成された予備成型品は、第
二のダイに対して前記第一のダイと逆向き、即ち、第一
のダイで下向きにてセットされた面を上向きにセット
し、歯形の両サイド面を均一化することが望ましい。In each of these two embodiments, a gear having a high precision is obtained by two-step cold forging using dies having different twist angles.
Since it can be supplied with uniform quality, it is perfect for mass production. In addition, the preformed product formed by the first die is set in the direction opposite to the first die with respect to the second die, that is, the surface set downward in the first die is set upward. However, it is desirable to make both side surfaces of the tooth profile uniform.
【００１３】前記実施例は、ボス部を一体に備えた歯車
について説明したが、ボス部を有しない単体の歯車や、
歯形が大小二段のリング状部にそれぞれ形成されるな
ど、歯車製品の形態は適宜変更される。In the above-mentioned embodiment, the gear having the boss portion integrally described is explained, but a single gear having no boss portion,
The form of the gear product is appropriately changed, for example, the tooth profile is formed in large and small two-stage ring-shaped portions.
【００１４】[0014]
【発明の効果】本発明によれば、予め欠肉部を見越して
大きめの歯形を形成しておき、その歯形から不要部を除
去するといった画期的な手法を採用したので、鍛造手段
ではそれまで不可能であった精度高いヘリカルギヤの製
造が可能となった。又、鍛造であるから、製品にはばら
つきがなくなって歩留りがよくなり、安価にて大量に供
給できる。そしてこの方法は、据え込み加工、絞り或い
は押し出し加工のいずれによっても実現可能である。According to the present invention, an epoch-making method is adopted in which a large tooth profile is formed in advance in anticipation of a fleshless portion, and an unnecessary portion is removed from the tooth profile. It has become possible to manufacture highly accurate helical gears, which was impossible until now. Further, since it is forged, there is no variation in the product, the yield is improved, and it can be supplied in large quantities at low cost. And this method can be realized by any of upsetting, drawing or extrusion.
【図１】 本発明に係るヘリカル歯車の製造方法を、据
え込み加工の場合における第一のダイについて示した説
明図である。FIG. 1 is an explanatory view showing a method of manufacturing a helical gear according to the present invention, for a first die in the case of upsetting.
【図２】 本発明に係るヘリカル歯車の製造方法を、据
え込み加工の場合における第二のダイについて示した説
明図である。FIG. 2 is an explanatory view showing a method of manufacturing a helical gear according to the present invention for a second die in the case of upsetting.
【図３】 据え込み加工において、第一のダイにて形成
された歯形を示した説明図である。FIG. 3 is an explanatory view showing a tooth profile formed by a first die during upsetting.
【図４】 据え込み加工において、第二のダイにて整形
された歯形を示した説明図である。FIG. 4 is an explanatory view showing a tooth profile shaped by a second die during upsetting.
【図５】 絞り加工において、第一のダイにて形成され
た歯形を示した説明図である。FIG. 5 is an explanatory view showing a tooth profile formed by the first die in the drawing process.
【図６】 絞り加工において、第二のダイにて整形され
た歯形を示した説明図である。FIG. 6 is an explanatory view showing a tooth profile shaped by a second die in the drawing process.
【図７】 据え込み加工における素材の変形及び素材の
変形に伴うヘリカル歯形のねじれ角度の変化を示した説
明図である。FIG. 7 is an explanatory diagram showing a deformation of a material in upsetting and a change in a twist angle of a helical tooth profile due to the deformation of the material.
【図８】 絞り加工における素材の変形及び素材の変形
に伴うヘリカル歯形のねじれ角度の変化を示した説明で
あるFIG. 8 is an illustration showing the deformation of the material in the drawing process and the change in the twist angle of the helical tooth profile due to the deformation of the material.
１・・第一のダイ、２・・第一のパンチ、３・・素材、
４・・第二のダイ、５・・第二のパンチ、、６，７・・
キャビティ、８・・マンドレル、９・・エジェクタ、１
０・・歯型（歯形成型用）、１１・・歯型（歯形整形
用）、１２・・ヘリカル歯形、１３・・歯面（製造せん
とする歯形の）、１４，１４’・・欠肉部、１５・・予
備成型品、１６・・歯形（所望形状に極めて忠実な）、
１７・・完成品、１８，１８’・・欠肉部。1 ... first die, 2 ... first punch, 3 ... material,
4 ... second die, 5 ... second punch, 6, 7 ...
Cavity, 8 mandrel, 9 ejector, 1
0 ·· Tooth mold (for tooth forming mold), 11 · · Tooth mold (for tooth shaping), 12 · · Helical tooth profile, 13 · · Tooth surface (tooth profile for manufacturing), 14, 14 ′ · · Missing Prefabricated part, 15 ・ ・, preform, 16 ・ ・ tooth shape (very faithful to the desired shape),
17 ・ ・ Complete product, 18, 18 '・
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B21J 1/00 - 13/14 B21J 17/00 - 19/04 B21K 1/00 - 31/00 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) B21J 1/00-13/14 B21J 17/00-19/04 B21K 1/00-31/00
Claims (2)
形の歯厚寸法より幅広く、加圧方向に対してねじれ角度
が小さい歯形形成用歯型を備えたダイにて据え込み加工
した後、製造せんとするヘリカルギヤにおける歯形の歯
厚寸法とねじれ角度とが合致した歯形整形用歯型を備え
たダイにて、歯形の歯面を整形することを特徴としたヘ
リカルギヤの製造方法。1. A manufacturing process is performed after upsetting is performed by a die having a tooth profile forming tooth mold having a tooth width wider than the tooth thickness of the tooth profile of the helical gear to be manufactured and having a small twist angle with respect to the pressing direction. A method for manufacturing a helical gear, characterized in that a tooth surface of a tooth profile is shaped by a die having a tooth profile shaping tooth profile in which a tooth thickness dimension of a tooth profile of a helical gear and a twist angle are matched.
形の歯厚寸法より幅広く、加圧方向に対してねじれ角度
が大きい歯形形成用歯型を備えたダイにて絞り又は押し
出し加工をした後、製造せんとするヘリカルギヤにおけ
る歯形の歯厚寸法とねじれ角度とが合致した歯形整形用
歯型を備えたダイにて、歯形の歯面を整形することを特
徴とするヘリカルギヤの製造方法。2. A manufacturing process is performed after drawing or extruding with a die equipped with a tooth profile forming tooth profile that is wider than the tooth thickness dimension of the tooth profile of the helical gear to be manufactured and has a large twist angle with respect to the pressing direction. A method for manufacturing a helical gear, comprising shaping a tooth surface of a tooth profile with a die having a tooth profile shaping tooth profile in which a tooth thickness dimension of a tooth profile of the helical gear and a twist angle are matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10983898A JP3494349B2 (en) | 1998-04-20 | 1998-04-20 | Helical gear manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10983898A JP3494349B2 (en) | 1998-04-20 | 1998-04-20 | Helical gear manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11300446A JPH11300446A (en) | 1999-11-02 |
| JP3494349B2 true JP3494349B2 (en) | 2004-02-09 |
Family
ID=14520495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10983898A Expired - Fee Related JP3494349B2 (en) | 1998-04-20 | 1998-04-20 | Helical gear manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3494349B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003091604A1 (en) * | 2002-04-26 | 2003-11-06 | O-Oka Corporation | Gear product and method of manufacturing the gear product |
| JP4881152B2 (en) | 2006-12-29 | 2012-02-22 | 大岡技研株式会社 | gear |
| DE102007015222B4 (en) * | 2007-03-05 | 2017-08-31 | Hirschvogel Umformtechnik Gmbh | Machining of workpieces to improve the material properties |
| JP5040686B2 (en) * | 2008-01-30 | 2012-10-03 | アイシン・エィ・ダブリュ株式会社 | Die for forging and processing method thereof, gear forging device and gear forging method |
-
1998
- 1998-04-20 JP JP10983898A patent/JP3494349B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11300446A (en) | 1999-11-02 |
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