JP2010131626A - Method for molding cylindrical gear - Google Patents
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- JP2010131626A JP2010131626A JP2008309292A JP2008309292A JP2010131626A JP 2010131626 A JP2010131626 A JP 2010131626A JP 2008309292 A JP2008309292 A JP 2008309292A JP 2008309292 A JP2008309292 A JP 2008309292A JP 2010131626 A JP2010131626 A JP 2010131626A
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本発明は、プレス加工により内部にフランジを設けた円筒歯車を得るための製造技術に関する。 The present invention relates to a manufacturing technique for obtaining a cylindrical gear provided with a flange inside by press working.
従来、図１に示すような、内部にフランジを備えた円筒歯車は、自動変速機等の動力伝達機構として広く用いられているが、このような円筒歯車は、通常、機械加工により外周面にスプライン形状の歯形を形成した円筒体とフランジとなる円盤を溶接等により接合させて製造されているが、回転軸を挿入するフランジの内径と円筒体の外周の歯形とを同軸としなければならず、そのため、仕上げ加工を必要とし、更に、機械加工による歯形の成形は時間を要するため、生産性が低く、製造コストが高くなり、また、歯形の形成が機械加工によるため、円筒体の繊維の流れが切断され充分な強度の円筒歯車が得られないという問題がある。 Conventionally, a cylindrical gear having a flange inside as shown in FIG. 1 has been widely used as a power transmission mechanism for an automatic transmission or the like. However, such a cylindrical gear is usually formed on an outer peripheral surface by machining. It is manufactured by welding a cylindrical body with a spline-shaped tooth profile and a disk serving as a flange by welding or the like, but the inner diameter of the flange into which the rotary shaft is inserted must be coaxial with the outer peripheral tooth profile of the cylindrical body. Therefore, finishing processing is required, and further, forming the tooth profile by machining requires time, resulting in low productivity and high manufacturing costs. Also, since the tooth profile is formed by machining, the cylindrical fiber There is a problem that the flow is cut and a sufficiently strong cylindrical gear cannot be obtained.
他方、円筒体の外面に形成する歯形を機械加工によらずに、押出加工で形成することも提案されており、例えば、特許文献１の特開平７−９０６８号公報には、プレス成形された有底円筒体を素材とし、その底部を上にして、下部から下型パンチを有底円筒体の内部に挿入するとともに、底部を上型パンチで押圧して、内周部に歯形部が形成されたダイスに圧入して、円筒部材の外周面に歯形を形成することが記載されている。
On the other hand, it has also been proposed that the tooth profile formed on the outer surface of the cylindrical body is formed by extrusion rather than by machining. For example, Japanese Patent Laid-Open No. 7-9068 of
しかしながら、前記した押出加工によるものは、中実のパンチを用い、円筒体の底部を押圧するため、フランジが内部に存在するような円筒部材では、フランジより上部が空間となるため、円筒体の上端を押圧すると、円筒部材の上部が変形するため、このような円筒体には適用できない。 However, in the above-described extrusion process, a solid punch is used to press the bottom of the cylindrical body. Therefore, in a cylindrical member in which the flange exists, the upper part of the cylinder is a space, so When the upper end is pressed, the upper part of the cylindrical member is deformed, and thus cannot be applied to such a cylindrical body.
したがって、本発明の目的は、上記従来技術の現状に鑑みなされたものであり、フランジを内部に備えた円筒部材から、押出加工により、表面欠陥のない、高精度の円筒歯車を、効率よく、かつ低コストで成形できる成形方法を提供することにある。 Therefore, the object of the present invention has been made in view of the current state of the prior art described above, and from a cylindrical member provided with a flange inside, a high-precision cylindrical gear without surface defects is efficiently obtained by extrusion, Another object is to provide a molding method that can be molded at low cost.
上記課題は、本発明の（１）「内部にフランジを備えた円筒部材を、内周面に歯形が形成されたダイスを用いて押出加工することにより、前記円筒部材の外周面に歯形を形成する円筒歯車の成形方法であって、前記円筒部材の内周面及びフランジを、フランジに向かって付勢した上カウンタパンチ及び下カウンタパンチにより拘束しながら押出加工することを特徴とする円筒歯車の成形方法」；
（２）「前記フランジの内端部は、拘束部材により拘束されていることを特徴とする前記（１）項に記載の円筒歯車の成形方法」；
（３）「前記円筒部材は、冷間、温間又は熱間加工により、円筒部とフランジとが一体生成されたものであることを特徴とする前記（１）項または（２）項に記載の円筒歯車の成形方法」により解決される。
The above-mentioned problems are as follows: (1) “Tooth profile is formed on the outer peripheral surface of the cylindrical member by extruding a cylindrical member having a flange inside using a die having a tooth profile formed on the inner peripheral surface. A method of forming a cylindrical gear, wherein an inner peripheral surface and a flange of the cylindrical member are extruded while being restrained by an upper counter punch and a lower counter punch biased toward the flange. Molding method ";
(2) "The method for forming a cylindrical gear according to (1), wherein the inner end portion of the flange is restrained by a restraining member";
(3) In the item (1) or (2), the cylindrical member and the flange are integrally formed by cold, warm or hot working. The cylindrical gear forming method of the present invention is solved.
すなわち、本発明は、フランジを内部に備えた円筒部材を押出成形する際に、円筒体の内部にはフランジの上下に空間があるため、円筒体上端を押圧すると円筒部材の上下が変形し、高精度の歯車が形成できない。そこで、円筒体の上下の空間に、それぞれ独立したカウンタパンチを配置し、円筒部材の内面を拘束して押出加工するものであるが、このような加工による断面減少率は、「（変形を受けた素材の断面積）／（素材の断面積）×１００％」で表わされ、減少率が大きいほど、材料を押圧するパンチの加工速度に対し、変形を受けた材料の流動速度が大きくなる。そのため、フランジを内部に備え円筒部材をプレス加工する場合、変形を受けた断面積は変わらないが、素材の断面積は、円筒部での加工では、円筒部の断面積となるが、フランジ部分では、「円筒部の断面積＋フランジの断面積」となり、フランジ部前後の素材の断面積より大きく、材料の流動速度が小さくなり、フランジ部を通過すると、素材の断面積がもとに戻るため、材料の流動速度が急激に上昇する。そのため、上部のカウンタパンチは、この急激な材料の流動速度の変化に追随できず、フランジと上部カウンタパンチとの間に隙間が生じ、この隙間を介して円筒体に内部方向に向かう材料の流動が発生し、製品の精度に悪影響を与えることから、上下のカウンタパンチにフランジに向かう付勢力を付与し、押出加工中、常に上下のカウンタパンチにより円筒部材の内面及びフランジを拘束できるようにして、高精度の歯形を形成するようにしたものである。 That is, in the present invention, when extruding a cylindrical member provided with a flange inside, since there is a space above and below the flange inside the cylindrical body, when the upper end of the cylindrical body is pressed, the top and bottom of the cylindrical member are deformed, High-precision gears cannot be formed. Therefore, independent counter punches are arranged in the upper and lower spaces of the cylindrical body, and the inner surface of the cylindrical member is constrained to perform extrusion processing. The cross-sectional area of the raw material) / (the cross-sectional area of the raw material) × 100% ”, and the larger the reduction rate, the greater the flow rate of the deformed material with respect to the processing speed of the punch pressing the material. . Therefore, when a cylindrical member is pressed with a flange inside, the cross-sectional area subjected to deformation does not change, but the cross-sectional area of the material becomes the cross-sectional area of the cylindrical part in the processing at the cylindrical part, but the flange part Then, the cross-sectional area of the cylindrical part + the cross-sectional area of the flange is larger than the cross-sectional area of the material before and after the flange part, and the flow rate of the material is reduced. Therefore, the flow rate of the material increases rapidly. For this reason, the upper counter punch cannot follow the rapid change in the material flow rate, and a gap is formed between the flange and the upper counter punch, and the material flows toward the inside of the cylinder through the gap. This will adversely affect the accuracy of the product, so that the upper and lower counter punches will be biased toward the flange so that the upper and lower counter punches can always restrain the inner surface and flange of the cylindrical member during the extrusion process. A high-precision tooth profile is formed.
以下の詳細かつ具体的な説明から明らかなように、本発明の成形方法では、円筒部材の内周面及びフランジを、フランジに向けて付勢した上カウンタパンチ及び下カウンタパンチにより拘束しながら押出加工して、円筒部材の外表面に歯形を形成するため、上部カウンタパンチとフランジ上面と間に隙間の発生が防止され、この隙間から円筒部材内方へ向かう材料の流動が阻止されるので、円筒部材の外周面に欠陥のない高精度の歯形が成形でき、さらに、歯形の形成を押出加工で行うため、円筒体部材外周面にファイバーフローの切断のない歯形が形成できるとともに、歯形は加工硬化するため、表面強度に優れた高精度の円筒歯車を高効率、且つ低コストで生産できるという極めて優れた効果を発揮するものである。 As will be apparent from the following detailed and specific description, in the molding method of the present invention, the inner peripheral surface and the flange of the cylindrical member are extruded while being restrained by the upper counter punch and the lower counter punch that are biased toward the flange. Since the tooth shape is formed on the outer surface of the cylindrical member by processing, the generation of a gap between the upper counter punch and the upper surface of the flange is prevented, and the flow of the material from the gap toward the inside of the cylindrical member is prevented. A high-precision tooth profile with no defects can be formed on the outer peripheral surface of the cylindrical member, and furthermore, since the tooth profile is formed by extrusion, a tooth profile without fiber flow cutting can be formed on the outer peripheral surface of the cylindrical member, and the tooth profile is processed. Since it cures, it exhibits an extremely excellent effect that a highly accurate cylindrical gear having excellent surface strength can be produced at high efficiency and at low cost.
本発明において、素材である内部にフランジを設けた円筒部材から、表面欠陥のない高精度の円筒歯車を成形するのに適した新規成形方法が考案された。以下、図面を参照して、この成形方法を詳細に説明する。
図１は、本発明による製品例を示し、図２は、そのような製品を成形する際に用いられる素材例を示す。ここで、図１の製品例である円筒歯車（１）は、スプライン状の歯形（１ｂ）が形成された円筒部（１ａ）と、その内部に設けられたフランジ（１ｃ）とからなり、フランジ（１ｃ）は、中央に歯車を回転させる回転軸を装着する開口（１ｄ）を有する。また、図２に示される素材となる円筒部材（２）は、円筒部（２ａ）とフランジ（２ｂ）とからなり、冷間、温間、熱間加工等により一体成形されたものである。
なお、本実施例では、さらに、フランジ（２ｂ）の中央に開口（２ｃ）を設け、外周部に凹部（２ｄ）を設けているが、これら開口（２ｃ）や凹部（２ｄ）は、製品機能に応じて設けるもので、製品の種類によっては必ずしも必要とするものではない。
In the present invention, a novel molding method suitable for molding a high-precision cylindrical gear free from surface defects from a cylindrical member provided with a flange inside as a material has been devised. Hereinafter, this molding method will be described in detail with reference to the drawings.
FIG. 1 shows an example of a product according to the present invention, and FIG. 2 shows an example of a material used when molding such a product. Here, the cylindrical gear (1) which is the product example of FIG. 1 includes a cylindrical portion (1a) in which a spline-shaped tooth profile (1b) is formed, and a flange (1c) provided therein, (1c) has an opening (1d) for mounting a rotating shaft for rotating a gear at the center. A cylindrical member (2) as a material shown in FIG. 2 includes a cylindrical portion (2a) and a flange (2b), and is integrally formed by cold, warm, hot working or the like.
In this embodiment, the opening (2c) is further provided in the center of the flange (2b) and the recess (2d) is provided in the outer peripheral portion. However, the opening (2c) and the recess (2d) Depending on the type of product, it is not always necessary.
図３〜図６には、本発明の成形方法を実施するのに適した成形装置例の概略構成と、この装置を用いた本発明の成形シーケンスの要点が示される。
（ａ）．この例のプレス装置（３）においては、上部機構は、スライド（４）により下降し、円筒部材（２）の上端部を押圧する円筒状パンチ（５）と、この円筒状パンチ（５）の内部空間に配置された上カウンタパンチ（６）とを備え、円筒状パンチ（５）の下部には、円筒部材（２）の上端に当接する円筒部（５ａ）を有する。また、上カウンタパンチ（６）は、円筒状パンチ（５）とは独立して上下動可能とするとともに、スライダ（４）と間にバネ（６ａ）を配置して、上カウンタパンチ（６）を下方に向けて付勢している。また、上カウンタパンチ（６）は、円筒部材（２）の内面に接するように、その外径を円筒部材の内径にほぼ等しくするとともに、下端面を円筒部材（２）のフランジ（２ｂ）の上面に適合する形状としている。
3 to 6 show a schematic configuration of an example of a molding apparatus suitable for carrying out the molding method of the present invention, and the main points of the molding sequence of the present invention using this apparatus.
(A). In the press device (3) of this example, the upper mechanism is lowered by the slide (4), and the cylindrical punch (5) pressing the upper end of the cylindrical member (2), and the cylindrical punch (5) An upper counter punch (6) disposed in the internal space is provided, and a cylindrical portion (5a) that contacts the upper end of the cylindrical member (2) is provided at the lower portion of the cylindrical punch (5). The upper counter punch (6) can be moved up and down independently of the cylindrical punch (5), and a spring (6a) is arranged between the slider (4) and the upper counter punch (6). Is biased downward. The upper counter punch (6) has an outer diameter substantially equal to the inner diameter of the cylindrical member so as to contact the inner surface of the cylindrical member (2), and a lower end surface of the upper counter punch (6) of the flange (2b) of the cylindrical member (2). The shape fits the top surface.
下部機構は、ダイス（７）と、下部カウンタパンチ（８）とを備え、ダイス（７）は、中央に孔部（７ａ）を有するリング状であって、孔部（７ａ）の下部内周面には、円筒部材の外面に歯形を形成するための歯形部（７ｂ）が突設され、基台（９）に固定されている。また、下カウンタパンチ（８）は、ダイス（７）の孔部（７ａ）内を上下動可能とするとともに、円筒部材（２）の内面に接するように、その外径を円筒部材の内径にほぼ等しく設定し、さらに、下端にはバネ（８ａ）を設けて下カウンタパンチ（８）を上方に向けて付勢し、非作動時には、下カウンタパンチ（８）の上端部がダイス（７）の歯形部（７ｂ）よりも上方に突出するようにしている。 The lower mechanism includes a die (7) and a lower counter punch (8), and the die (7) has a ring shape having a hole (7a) at the center, and a lower inner periphery of the hole (7a). A tooth profile portion (7b) for forming a tooth profile on the outer surface of the cylindrical member protrudes from the surface and is fixed to the base (9). The lower counter punch (8) can move up and down in the hole (7a) of the die (7), and its outer diameter is set to the inner diameter of the cylindrical member so as to contact the inner surface of the cylindrical member (2). The lower counter punch (8) is urged upward by providing a spring (8a) at the lower end, and the upper end of the lower counter punch (8) is placed in the die (7) when not operating. It protrudes upward from the tooth profile (7b).
（ｂ）．したがって、円筒部材（２）を、プレス装置（３）にセットすると、下部カウンタパンチ（８）の上端がダイス（７）の歯形部（７ｂ）よりも上方に突出しているので、円筒部材（２）の下部は、下部カウンタパンチ（８）に装着され、下部カウンタパンチ（８）の上端部が円筒部材（２）のフランジ（２ｂ）の下面に当接するとともに、側部が円筒部材（２）の内面に接して、円筒部材（２）の下部を拘束する。 (B). Accordingly, when the cylindrical member (2) is set in the pressing device (3), the upper end of the lower counter punch (8) protrudes upward from the tooth profile (7b) of the die (7). ) Is attached to the lower counter punch (8), the upper end of the lower counter punch (8) is in contact with the lower surface of the flange (2b) of the cylindrical member (2) and the side is cylindrical member (2). The lower part of the cylindrical member (2) is restrained in contact with the inner surface.
（ｃ）．次いで、スライド（４）を駆動すると、円筒状パンチ（５）と上カウンタパンチ（６）は降下し、上カウンタパンチ（６）は、円筒部材（２）の内部に進入し、下端面が円筒部材（２）のフランジ（２ｂ）の上面に当接し、円筒部材（２）の非拘束部を一方向だけにし、その後、円筒状パンチ（５）が、円筒部材（２）の上端面を押す（図３の左側）。 (C). Next, when the slide (4) is driven, the cylindrical punch (5) and the upper counter punch (6) descend, the upper counter punch (6) enters the inside of the cylindrical member (2), and the lower end surface is cylindrical. The upper surface of the flange (2b) of the member (2) is brought into contact with the unconstrained portion of the cylindrical member (2) in only one direction, and then the cylindrical punch (5) presses the upper end surface of the cylindrical member (2). (Left side of FIG. 3).
（ｄ）．さらに、円筒状パンチ（５）を降下させると、円筒部材（２）の下端は、ダイス（７）の歯形部（７ｂ）に当接して、成形加工が開始され（図４）、円筒部材（２）の円筒部（２ａ）の下部は、下カウンタパンチ（８）とダイス（７）の歯形部（７ｂ）との間から押出され、延伸しながら、外周面に歯形が形成される。 (D). Further, when the cylindrical punch (5) is lowered, the lower end of the cylindrical member (2) comes into contact with the tooth profile (7b) of the die (7), and molding is started (FIG. 4). The lower part of the cylindrical part (2a) of 2) is extruded from between the lower counter punch (8) and the tooth form part (7b) of the die (7), and a tooth form is formed on the outer peripheral surface while extending.
（ｅ）．円筒状パンチ（５）が降下し、押出が進行して、ダイス（７）の歯形部（７ａ）の上面が円筒部材（２）のフランジ（２ｂ）に至ると（図５）。この部分の素材の断面積は、「円筒部の断面積＋フランジの断面積」となるため、加工による断面減少率は極めて小さくなり、円筒部材（２）のフランジ（２ｂ）部を歯形部（７ｂ）が通過中（図６）、円筒部材（２）の材料の流動速度は急激に低下する。 (E). When the cylindrical punch (5) descends and extrusion proceeds, the upper surface of the tooth profile (7a) of the die (7) reaches the flange (2b) of the cylindrical member (2) (FIG. 5). Since the cross-sectional area of the material of this portion is “the cross-sectional area of the cylindrical portion + the cross-sectional area of the flange”, the cross-sectional reduction rate due to processing becomes extremely small, and the flange (2b) portion of the cylindrical member (2) is replaced with the tooth profile portion ( While 7b) is passing (FIG. 6), the flow rate of the material of the cylindrical member (2) decreases rapidly.
（ｅ）．歯形部（７ｂ）の上面がフランジ（２ｂ）を通過すると、加工される素材の断面積は、円筒部（２ａ）の断面積に戻るため、断面減少率が大きくなり、円筒部材（２）の材料の流動速度が急激に速くなる。このとき、上カウンタパンチ（６）は、バネ（６ａ）により下方に向かって付勢され、材料の流動速度の上昇に追随できるため、フランジ（２ｂ）の上面に当接した状態を維持し、フランジ（２ｂ）の上面と上カウンタパンチ（６）の下端との間での隙間の発生を防止するので、円筒部（２ａ）の内方に向かう材料の流動が阻止され、製品精度の悪化や材料の重なり等の欠陥を防止できる。 (E). When the upper surface of the tooth profile portion (7b) passes through the flange (2b), the cross-sectional area of the material to be processed returns to the cross-sectional area of the cylindrical portion (2a). The material flow rate increases rapidly. At this time, the upper counter punch (6) is urged downward by the spring (6a) and can follow the increase in the flow rate of the material, so that the upper counter punch (6) is kept in contact with the upper surface of the flange (2b), Since the generation of a gap between the upper surface of the flange (2b) and the lower end of the upper counter punch (6) is prevented, the flow of the material toward the inside of the cylindrical portion (2a) is prevented, and the product accuracy is deteriorated. Defects such as material overlap can be prevented.
なお、フランジ（２ｂ）に開口（２ｃ）がある場合、円筒部材（２）のフランジ（２ｂ）部を歯形部（７ｂ）が通過中（図６）に、円筒部（２ａ）は、フランジ（２ｂ）の中央に向かう材料の流動が生ずるため、この流動を防止するように、フランジ（２ｂ）の開口（２ｃ）に拘束部材を配置し、フランジ（２ｂ）の内端部を拘束することが好ましい。このような拘束部材としては、開口（２ｃ）に合致する中子を用いてもよく、また、上下のカウンタパンチ（６）、（８）の一方に凸部を設けて、拘束部材としてもよい。 When the flange (2b) has an opening (2c), the toothed portion (7b) passes through the flange (2b) portion of the cylindrical member (2) (FIG. 6), and the cylindrical portion (2a) Since the flow of the material toward the center of 2b) occurs, a restraining member is arranged in the opening (2c) of the flange (2b) so as to prevent this flow, and the inner end of the flange (2b) is restrained. preferable. As such a restraining member, a core matching the opening (2c) may be used, or a convex portion may be provided on one of the upper and lower counter punches (6) and (8) to serve as the restraining member. .
成形が終了すると（図３の右側）、図１に示す、円筒歯車（１）が高精度で成形されるので、円筒状パンチ（５）及び上カウンタパンチ（６）を上方に駆動すると、成形された円筒歯車（１）は、バネ（８ａ）の付勢による下カウンタパンチ（８）とともに上昇するので、プレス装置（３）から簡単に取り出すことができる。取り出された円筒歯車（１）は、図１に示すように、上部に、押し残り部（１ｅ）ができるので、必要に応じて、この押し残り部（１ｄ）を切断して製品となる。 When the molding is completed (right side of FIG. 3), the cylindrical gear (1) shown in FIG. 1 is molded with high accuracy. Therefore, when the cylindrical punch (5) and the upper counter punch (6) are driven upward, the molding is performed. The cylindrical gear (1) thus lifted together with the lower counter punch (8) urged by the spring (8a) can be easily taken out from the press device (3). As shown in FIG. 1, the extracted cylindrical gear (1) has a push remaining portion (1e) in the upper portion, and the push remaining portion (1d) is cut as necessary to obtain a product.
このように、本願発明では、押出加工中、上下のカウンタパンチにより、常に円筒部材の内面及びフランジが拘束されているので、フランジ部を通過後の押出速度の急激な上昇があっても、フランジと上カウンタパンチと間に隙間が発生せず、高精度の歯形が形成できるものである。 Thus, in the present invention, since the inner surface and the flange of the cylindrical member are always restrained by the upper and lower counter punches during the extrusion process, even if there is a sudden increase in the extrusion speed after passing through the flange portion, the flange No gap is generated between the upper counter punch and the upper counter punch, and a highly accurate tooth profile can be formed.
本発明の成形方法を行なうために必要な上下のカウンタパンチに付勢力を与える方法として、上記の例では、バネを用いているが、材料の流動性の変化に追随できるような付勢力を付与できれば、油圧、空圧等を用いたアキュームレータ、ガスクッション等を用いることもできる。また、下カウンタパンチは、局部成形を行なうためのクッションを付与できればよいので、上カウンタパンチよりも弱い付勢力でもよく、油圧、空圧等のガスクッション等を用いることができる。 In the above example, a spring is used as a method of applying an urging force to the upper and lower counter punches necessary for performing the molding method of the present invention. However, an urging force that can follow the change in fluidity of the material is applied. If possible, an accumulator, a gas cushion, or the like using hydraulic pressure, pneumatic pressure, or the like can be used. Further, since the lower counter punch only needs to be able to provide a cushion for performing local molding, it may have an urging force weaker than that of the upper counter punch, and a gas cushion such as hydraulic pressure or pneumatic pressure can be used.
また、素材となる円筒部材は、円柱部材から、切削加工、或いは、熱間、温間または冷間の塑性加工等いずれの手段で形成されてもよいが、冷間または温間によるプレス成形により、円筒部とフランジとを一体成形することが好ましく、このように、プレス加工により素材を作成すると、以後の円筒歯車の成形とが一連の連続作業として行なえるので、生産効率が向上し、より低コストで製造できる。 Further, the cylindrical member as the material may be formed by any means such as cutting or hot, warm or cold plastic working from the column member, but by cold or warm press molding. The cylindrical part and the flange are preferably integrally formed. Thus, when the material is created by press working, the subsequent cylindrical gear can be formed as a series of continuous operations, so that the production efficiency is improved. Can be manufactured at low cost.
１ 円筒歯車
１ａ 円筒部
１ｂ スプライン状の歯形
１ｃ フランジ
１ｄ 開口
１ｅ 押し残り部
２ 円筒部材
２ａ 円筒部
２ｂ フランジ
２ｃ 開口
２ｄ 凹部
３ プレス装置
４ スライド
５ 円筒状パンチ
５ａ 円筒部
６ 上カウンタパンチ
６ａ バネ
７ ダイス
７ａ 孔部
７ｂ 歯形部
８ 下カウンタパンチ
８ａ バネ
９ 基台
DESCRIPTION OF
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| JP2008309292A JP5161051B2 (en) | 2008-12-04 | 2008-12-04 | Forming method of cylindrical gear |
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| JP2008309292A JP5161051B2 (en) | 2008-12-04 | 2008-12-04 | Forming method of cylindrical gear |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112012000408T5 (en) | 2011-03-31 | 2013-12-24 | Aisin Aw Co., Ltd. | Steel gear and manufacturing method therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6030541A (en) * | 1983-07-27 | 1985-02-16 | Yamakawa Kogyo Kk | Manufacture of plate pulley |
| JPS6192750A (en) * | 1984-10-15 | 1986-05-10 | Komatsu Ltd | Warm forging device of gear |
| JPH02133136A (en) * | 1988-11-11 | 1990-05-22 | Mitsubishi Motors Corp | Manufacture of warm or hot forged parts |
| JPH10202339A (en) * | 1997-01-17 | 1998-08-04 | Musashi Seimitsu Ind Co Ltd | Forming method for housing with flange |
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2008
- 2008-12-04 JP JP2008309292A patent/JP5161051B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6030541A (en) * | 1983-07-27 | 1985-02-16 | Yamakawa Kogyo Kk | Manufacture of plate pulley |
| JPS6192750A (en) * | 1984-10-15 | 1986-05-10 | Komatsu Ltd | Warm forging device of gear |
| JPH02133136A (en) * | 1988-11-11 | 1990-05-22 | Mitsubishi Motors Corp | Manufacture of warm or hot forged parts |
| JPH10202339A (en) * | 1997-01-17 | 1998-08-04 | Musashi Seimitsu Ind Co Ltd | Forming method for housing with flange |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112012000408T5 (en) | 2011-03-31 | 2013-12-24 | Aisin Aw Co., Ltd. | Steel gear and manufacturing method therefor |
| DE112012000408B4 (en) * | 2011-03-31 | 2016-04-21 | Aisin Aw Co., Ltd. | Steel gear and manufacturing method therefor |
| US9441723B2 (en) | 2011-03-31 | 2016-09-13 | Aisin Aw Co., Ltd. | Steel gear and manufacturing method for the same |
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| JP5161051B2 (en) | 2013-03-13 |
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