JP6040892B2 - Manufacturing method of helical gear - Google Patents
Manufacturing method of helical gear Download PDFInfo
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- JP6040892B2 JP6040892B2 JP2013174581A JP2013174581A JP6040892B2 JP 6040892 B2 JP6040892 B2 JP 6040892B2 JP 2013174581 A JP2013174581 A JP 2013174581A JP 2013174581 A JP2013174581 A JP 2013174581A JP 6040892 B2 JP6040892 B2 JP 6040892B2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/08—Profiling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
- B21K1/305—Making machine elements wheels; discs with gear-teeth helical
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/14—Construction providing resilience or vibration-damping
- F16H55/16—Construction providing resilience or vibration-damping relating to teeth only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
Description
本発明は、ヘリカルギヤ及びその製造方法、及びギヤ装置に関し、例えば中空孔と、外周部に形成されたヘリカル歯と、を備え、鍛造成形されるヘリカルギヤ及びその製造方法、ギヤ装置に関する。 The present invention relates to a helical gear, a method for manufacturing the same, and a gear device, and more particularly, to a helical gear that is forged and provided with a hollow hole and a helical tooth formed on an outer peripheral portion, a method for manufacturing the helical gear, and a gear device.
ヘリカルギヤは、特許文献１に開示されているように、例えば連続鍛造成形によって製造される。 As disclosed in Patent Document 1, the helical gear is manufactured by, for example, continuous forging.
このように連続鍛造成形によって製造されるヘリカルギヤは、ヘリカル歯の累積ピッチ誤差が大きく、そのままでは噛み合わされるギヤとのＮＶ（noise vibration）性能が低い。そのため、ヘリカル歯における噛み合わされる他のギヤとの歯当たり面にクラウニング処理を施す必要がある。よって、ヘリカルギヤの製造が煩雑である。 Thus, the helical gear manufactured by continuous forging has a large cumulative pitch error of helical teeth, and the NV (noise vibration) performance with the gear to be meshed is low as it is. Therefore, it is necessary to perform a crowning process on the tooth contact surface of the helical tooth with another gear to be engaged. Therefore, the manufacture of the helical gear is complicated.
本発明は、このような問題点を解決するためになされたものであり、ヘリカル歯の累積ピッチ誤差が小さく、製造が簡単なヘリカルギヤ及びその製造方法、ギヤ装置を提供することを目的とする。 The present invention has been made to solve such problems, and an object of the present invention is to provide a helical gear, a manufacturing method thereof, and a gear device that are easy to manufacture with a small cumulative pitch error of helical teeth.
本発明の一形態に係るヘリカルギヤは、中空孔と外周部に形成されたヘリカル歯とを備え、鍛造成形されるヘリカルギヤであって、噛み合わされる他のギヤとの歯当たり面にクラウニング処理が施されず、且つ鍛造成形された前記ヘリカル歯の蓄積ピッチ誤差が、国際標準化規格で規定される累積ピッチ誤差規定表での精度等級のＮ６以下の累積ピッチ誤差である。 A helical gear according to an embodiment of the present invention includes a hollow hole and a helical tooth formed on an outer peripheral portion, is a helical gear that is forged, and is subjected to crowning treatment on a tooth contact surface with another gear to be engaged. The accumulated pitch error of the helical tooth that has not been forged is an accumulated pitch error of N6 or less of the accuracy grade in the accumulated pitch error definition table defined by the international standardization standard.
本発明の一形態に係るギヤ装置は、上述のヘリカルギヤを備える。 The gear apparatus which concerns on one form of this invention is provided with the above-mentioned helical gear.
本発明の一形態に係るヘリカルギヤの製造方法は、中空孔と外周部に形成されるヘリカル歯とを備えるヘリカルギヤを鍛造成形によって製造する方法であって、円筒素材の鍛造成形方向に配置された対向面の平行度、内周部の垂直度、内周部と外周部との同軸度を０．０５以下に製造し、前記円筒素材の内周部内にマンドレルを挿入して、前記円筒素材をパンチによって押圧し、前記マンドレルによって前記円筒素材の内周部を所定の径の中空孔にしつつ前記円筒素材の外周部にダイスによってヘリカル歯を成形し、噛み合わされる他のギヤとの歯当たり面にクラウニング処理を施さず、鍛造成形された前記ヘリカル歯の蓄積ピッチ誤差を、国際標準化規格で規定される累積ピッチ誤差規定表での精度等級のＮ６以下の累積ピッチ誤差とする。 A method for manufacturing a helical gear according to an aspect of the present invention is a method for manufacturing a helical gear including a hollow hole and a helical tooth formed on an outer peripheral portion by forging, and is opposed to the cylindrical material in the forging direction. The parallelism of the surface, the perpendicularity of the inner periphery, and the coaxiality between the inner periphery and the outer periphery are manufactured to 0.05 or less, and a mandrel is inserted into the inner periphery of the cylindrical material to punch the cylindrical material The helical teeth are formed by a die on the outer peripheral portion of the cylindrical material while the inner periphery of the cylindrical material is made a hollow hole of a predetermined diameter by the mandrel, and the tooth contact surface with the other gear to be engaged is formed. The cumulative pitch error of the helical tooth that has been forged and formed without crowning is defined as the cumulative pitch error of N6 or less of the accuracy grade in the cumulative pitch error specification table specified by the international standardization standard.
以上、説明したように、ヘリカル歯の累積ピッチ誤差が小さく、製造が簡単なヘリカルギヤ及びその製造方法、ギヤ装置を提供することができる。 As described above, it is possible to provide a helical gear, a manufacturing method thereof, and a gear device that are easy to manufacture with a small cumulative pitch error of helical teeth.
以下、本発明を実施するための最良の形態について、添付図面を参照しながら説明する。但し、本発明が以下の実施の形態に限定される訳ではない。また、説明を明確にするため、以下の記載及び図面は、適宜、簡略化されている。 The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. However, the present invention is not limited to the following embodiment. In addition, for clarity of explanation, the following description and drawings are simplified as appropriate.
本実施の形態のヘリカルギヤ及びその製造方法、ギヤ装置を説明する。先ず、ヘリカルギヤの構成を説明する。ここで、図１は、ヘリカルギヤ１を概略的に示す正面図である。図２は、ヘリカルギヤ１を概略的に示す上方斜視図である。図３は、ヘリカルギヤ１を概略的に示し、当該ヘリカルギヤを反転させ、上方から見た斜視図である。図４は、国際標準化規格（ＩＳＯ）で規定される累積ピッチ誤差規定表であり、本実施の形態のヘリカルギヤの精度等級と従来のヘリカルギヤの精度等級を示す図である。 A helical gear, a manufacturing method thereof, and a gear device according to the present embodiment will be described. First, the configuration of the helical gear will be described. Here, FIG. 1 is a front view schematically showing the helical gear 1. FIG. 2 is an upper perspective view schematically showing the helical gear 1. FIG. 3 is a perspective view schematically showing the helical gear 1, in which the helical gear is reversed and viewed from above. FIG. 4 is a cumulative pitch error prescription table defined by the International Standardization Standard (ISO), and shows the accuracy grade of the helical gear of the present embodiment and the accuracy grade of the conventional helical gear.
本実施の形態のヘリカルギヤ１は、詳細は後述するが鍛造によって成形することができる。このようなヘリカルギヤ１は、図１乃至図３に示すように、円筒形を基本形状とし、回転軸方向に貫通する中空孔２と、外周部に形成された複数のヘリカル歯３と、を備えている。 The helical gear 1 of the present embodiment can be formed by forging as will be described in detail later. As shown in FIGS. 1 to 3, such a helical gear 1 has a cylindrical shape as a basic shape, and includes a hollow hole 2 penetrating in the rotation axis direction and a plurality of helical teeth 3 formed on the outer peripheral portion. ing.
中空孔２は、回転軸方向から見て円形に形成されており、所定の直径を有する。中空孔２を基準として回転するヘリカルギヤ１は、中空孔２を基準とした累積ピッチが重要である。複数のヘリカル歯３の累積ピッチ誤差は、図４に示すように、ＩＳＯで規定される累積ピッチ誤差規格表での精度等級のＮ６以下（即ち、Ｎ６、Ｎ５、Ｎ４、Ｎ３…）の累積ピッチ誤差である。そのため、複数のヘリカル歯３の累積ピッチ誤差は、従来の約１／２以下である。 The hollow hole 2 is formed in a circular shape when viewed from the rotation axis direction, and has a predetermined diameter. In the helical gear 1 that rotates with the hollow hole 2 as a reference, the cumulative pitch with respect to the hollow hole 2 is important. As shown in FIG. 4, the accumulated pitch error of the plurality of helical teeth 3 is an accumulated pitch of N6 or less (that is, N6, N5, N4, N3...) Of the accuracy grade in the accumulated pitch error standard table defined by ISO. It is an error. Therefore, the cumulative pitch error of the plurality of helical teeth 3 is about ½ or less of the conventional one.
このように複数のヘリカル歯３を形成することによって、ＮＶ性能が向上し、従来必要であった噛み合わされるギヤとの歯当たり面にクラウニング処理を施す必要がない。 By forming the plurality of helical teeth 3 in this manner, the NV performance is improved, and it is not necessary to perform a crowning process on the tooth contact surface with the gear to be meshed, which has been necessary conventionally.
そのため、本実施の形態のヘリカルギヤ１は、ヘリカル歯３の歯当たり面へのクラウニング処理を省略できるので、ヘリカル歯３の歯当たり面に鍛造肌が残存しているギヤである。又は、本実施の形態のヘリカルギヤ１は、熱処理後の極表層の性能を改善する程度のショット肌面程度のギヤである。また、本実施の形態のヘリカルギヤ１におけるヘリカル歯３の歯当たり面は、鍛造自然形状であり、略平面、凹円弧面又は凸円弧面を備えている。 Therefore, the helical gear 1 of the present embodiment is a gear in which forging skin remains on the tooth contact surface of the helical tooth 3 because the crowning process to the tooth contact surface of the helical tooth 3 can be omitted. Or the helical gear 1 of this Embodiment is a gear of the shot skin surface grade which is the grade which improves the performance of the extreme surface layer after heat processing. Further, the contact surface of the helical tooth 3 in the helical gear 1 of the present embodiment has a forged natural shape, and has a substantially flat surface, a concave arc surface, or a convex arc surface.
このように本実施の形態のヘリカルギヤ１は、複数のヘリカル歯３の累積ピッチ誤差をＩＳＯで規定される累積ピッチ誤差規格表での精度等級のＮ６以下の累積ピッチ誤差としている。そのため、従来必要であったヘリカル歯３の歯当たり面へのクラウニング処理を省略でき、簡単に製造することができる。 As described above, in the helical gear 1 of the present embodiment, the cumulative pitch error of the plurality of helical teeth 3 is set to the cumulative pitch error of N6 or less of the accuracy grade in the cumulative pitch error standard table defined by ISO. Therefore, the crowning process to the tooth contact surface of the helical tooth 3 which was conventionally necessary can be omitted, and the manufacturing can be easily performed.
しかも、本実施の形態のヘリカルギヤ１は、クラウニング処理を省略できるので、歯当たり面と歯底との境界部分に段差が殆ど生じない。そのため、歯当たり面と歯底との境界部分に応力集中部がなく、強度の高いヘリカルギヤを構成することができる。 In addition, since the helical gear 1 according to the present embodiment can omit the crowning process, there is almost no step at the boundary between the tooth contact surface and the tooth bottom. Therefore, there is no stress concentration portion at the boundary portion between the tooth contact surface and the tooth bottom, and a high-strength helical gear can be configured.
次に、本実施の形態のヘリカルギヤ１の製造方法を説明する。ここで、図５は、本実施の形態の製造方法に用いる素材を概略的に示す図である。図６及び図７は、本実施の形態の製造方法を概略的に示す工程図である。なお、製造工程自体は、ヘリカルギヤを製造するために実施される既知の鍛造成形法であるため、簡単に説明する。 Next, the manufacturing method of the helical gear 1 of this Embodiment is demonstrated. Here, FIG. 5 is a diagram schematically showing materials used in the manufacturing method of the present embodiment. 6 and 7 are process diagrams schematically showing the manufacturing method of the present embodiment. In addition, since the manufacturing process itself is a known forging method performed for manufacturing a helical gear, it will be briefly described.
先ず、円筒素材１０を製造する。円筒素材１０は、図５に示すように、鍛造成形方向に配置された対向する面１０ａ、１０ｂの平行度、内周部１０ｃの垂直度、内周部１０ｃと外周部１０ｄとの同軸度が所定の値以下となるように製造される。例えば、円筒素材１０における対向する面１０ａ、１０ｂの平行度、内周部１０ｃの垂直度、内周部１０ｃと外周部１０ｄとの同軸度が０．０５以下となるように製造されることが好ましい。つまり、本実施の形態の製造方法では、従来のヘリカルギヤを製造するべく用いられている円筒素材に対して高精度に製造された円筒素材１０を用いる。 First, the cylindrical material 10 is manufactured. As shown in FIG. 5, the cylindrical material 10 has parallelism of opposing surfaces 10a and 10b arranged in the forging direction, verticality of the inner peripheral portion 10c, and coaxiality between the inner peripheral portion 10c and the outer peripheral portion 10d. Manufactured to be below a predetermined value. For example, the cylindrical material 10 is manufactured so that the parallelism of the opposing surfaces 10a and 10b, the perpendicularity of the inner peripheral portion 10c, and the coaxiality between the inner peripheral portion 10c and the outer peripheral portion 10d are 0.05 or less. preferable. That is, in the manufacturing method of the present embodiment, the cylindrical material 10 manufactured with high accuracy is used for the cylindrical material used to manufacture the conventional helical gear.
次に、図６に示すように、高精度に製造した円筒素材１０を鍛造成形装置２０の冶具２２に嵌合されたダイス２３内に挿入すると共に、円筒素材１０の内周部１０ｃ内にマンドレル２４を差し込み、複数個（図示例では、四個）の円筒素材１０を積層する。 Next, as shown in FIG. 6, the cylindrical material 10 manufactured with high accuracy is inserted into a die 23 fitted to the jig 22 of the forging apparatus 20, and the mandrel is inserted into the inner peripheral portion 10 c of the cylindrical material 10. 24 is inserted, and a plurality (four in the illustrated example) of cylindrical materials 10 are stacked.
次に、図７に示すように、パンチ２１で最上段の円筒素材１０を下方に押し込む。これにより、積層された円筒素材１０は下方に押し込まれ、外周部１０ｄがダイス２３の歯切り部に押し付けられつつ当該ダイス２３に接触する円筒素材１０が回転し、最下段の円筒素材１０から上方の円筒素材１０に向かって順に外周部にヘリカル歯が成形される。それと共に、円筒素材１０の内周部１０ｃがマンドレル２４に押し付けられて所定の直径に成形され、ヘリカルギヤ１として成形される。 Next, as shown in FIG. 7, the uppermost cylindrical material 10 is pushed downward by the punch 21. As a result, the laminated cylindrical material 10 is pushed downward, and the cylindrical material 10 that contacts the die 23 rotates while the outer peripheral portion 10d is pressed against the gear cutting portion of the die 23, and the upper cylindrical material 10 moves upward. Helical teeth are formed on the outer peripheral portion in order toward the cylindrical material 10. At the same time, the inner peripheral portion 10 c of the cylindrical material 10 is pressed against the mandrel 24 to be molded into a predetermined diameter, and is formed as the helical gear 1.
各々の円筒素材１０は、上述のように高精度に製造されているので、上下方向から見てマンドレル２４の中心軸と円筒素材１０の中心軸を略等しい位置に配置することができ、しかも各々の円筒素材１０を高い水平度で積層することができる。そのため、鍛造成形した際のヘリカル歯の累積ピッチ誤差を極めて小さくすることができ、それ故に本実施の形態の製造方法で製造されたヘリカルギヤ１はＮＶ性能が高い。よって、従来必要であったクラウニング処理や研磨処理等を略省略することができ、製造が簡単である。 Since each cylindrical material 10 is manufactured with high accuracy as described above, the central axis of the mandrel 24 and the central axis of the cylindrical material 10 can be arranged at substantially the same position when viewed from above and below. The cylindrical material 10 can be laminated with a high level of horizontality. Therefore, the accumulated pitch error of the helical teeth at the time of forging can be made extremely small. Therefore, the helical gear 1 manufactured by the manufacturing method of the present embodiment has high NV performance. Therefore, the conventionally required crowning treatment and polishing treatment can be substantially omitted, and the production is simple.
次に、本実施の形態のヘリカルギヤ１の具体的な使用形態を説明する。ここで、図８は、本実施の形態のヘリカルギヤ１を用いたギヤ装置３０を示す端面図である。図９は、図８のIX−IX線による断面図である。図１０は、ヘリカルギヤ１の支持部を拡大して示す縦断面図である。 Next, a specific usage pattern of the helical gear 1 of the present embodiment will be described. Here, FIG. 8 is an end view showing a gear device 30 using the helical gear 1 of the present embodiment. 9 is a cross-sectional view taken along line IX-IX in FIG. FIG. 10 is an enlarged longitudinal sectional view showing the support portion of the helical gear 1.
図８及び図９に示すように、本実施の形態のギヤ装置３０は、自動車の自動変速機等に用いられるプラネタリギヤアセンブリであり、周方向に沿って等間隔で複数個（本実施の形態では、五個）のヘリカルギヤ１がピニオンギヤとして配置され、プラネタリキャリア３１に回転可能に支持されている。 As shown in FIGS. 8 and 9, the gear device 30 of the present embodiment is a planetary gear assembly used for an automatic transmission of an automobile, and the like (in the present embodiment, a plurality of gear devices 30 are equally spaced along the circumferential direction). , Five) helical gears 1 are arranged as pinion gears and are rotatably supported by the planetary carrier 31.
プラネタリキャリア３１は、リング状のキャリア本体３２と、キャリアカバー３３と、を備えており、キャリア本体３２とキャリアカバー３３とは接合されている。プラネタリキャリア３１及びヘリカルギヤ１には、ピン３４が通されており、ピン３４は、その端部がかしめられてプラネタリキャリア３１に固定されている。 The planetary carrier 31 includes a ring-shaped carrier body 32 and a carrier cover 33, and the carrier body 32 and the carrier cover 33 are joined. A pin 34 is passed through the planetary carrier 31 and the helical gear 1, and the end of the pin 34 is fixed to the planetary carrier 31 by caulking.
ヘリカルギヤ１は、当該ヘリカルギヤ１とピン３４との間に介在されたニードルベアリング３５によって回転可能に支持されている。ヘリカルギヤ１の両端部とプラネタリキャリア３１との間には、スラストワッシャ３６が介在されている。 The helical gear 1 is rotatably supported by a needle bearing 35 interposed between the helical gear 1 and the pin 34. A thrust washer 36 is interposed between the both ends of the helical gear 1 and the planetary carrier 31.
ここで、ヘリカルギヤ１を鍛造によって成形した際に、ヘリカル歯３から鍛造成形方向に鍛造凸部３ｃが突出する。このとき、図１０に示すように、鍛造凸部３ｃの高さＨがスラストワッシャ３６の厚みＴより低い場合は当該鍛造凸部３ｃを残存させてもよい。これにより、鍛造凸部３ｃを削除する工程を省略することができ、より簡単にヘリカルギヤ１を製造することができる。 Here, when the helical gear 1 is formed by forging, the forging convex part 3c protrudes from the helical tooth 3 in the forging forming direction. At this time, as shown in FIG. 10, when the height H of the forged convex portion 3 c is lower than the thickness T of the thrust washer 36, the forged convex portion 3 c may remain. Thereby, the process which deletes the forge convex part 3c can be skipped, and the helical gear 1 can be manufactured more easily.
以上、本発明の実施の形態を説明したが、上記に限らず、本発明の技術的思想を逸脱しない範囲で、変更することが可能である。 The embodiment of the present invention has been described above. However, the present invention is not limited to the above, and can be changed without departing from the technical idea of the present invention.
上記実施の形態では、ヘリカルギヤ１をプラネタリギヤアセンブリに用いたが、他のギヤ装置に用いることもできる。 In the above embodiment, the helical gear 1 is used for the planetary gear assembly, but it can also be used for other gear devices.
１ ヘリカルギヤ
２ 中空孔
３ ヘリカル歯、３ａ 歯当たり面、３ｂ 凹部、３ｃ 鍛造凸部
１０ 円筒素材、１０ａ、１０ｂ 対向する面、１０ｃ 内周部、１０ｄ 外周部
２０ 製造装置
２１ パンチ
２２ 冶具
２３ ダイス
２４ マンドレル
３０ ギヤ装置
３１ プラネタリキャリア
３２ キャリア本体
３３ キャリアカバー
３４ ピン
３５ ニードルベアリング
３６ スラストワッシャ
DESCRIPTION OF SYMBOLS 1 Helical gear 2 Hollow hole 3 Helical tooth, 3a Tooth contact surface, 3b Recessed part, 3c Forging convex part 10 Cylindrical material, 10a, 10b Opposite surface, 10c Inner peripheral part, 10d Outer peripheral part 20 Manufacturing apparatus 21 Punch 22 Jig 23 Die 24 Mandrel 30 Gear device 31 Planetary carrier 32 Carrier body 33 Carrier cover 34 Pin 35 Needle bearing 36 Thrust washer
Claims (2)
円筒素材の鍛造成形方向に配置された対向面の平行度、内周部の垂直度、内周部と外周部との同軸度を０．０５以下に製造する工程と、
複数の円筒素材をダイス内に挿入すると共に、前記複数の円筒素材の内周部内にマンドレルを挿入して、前記複数の円筒素材を積層する工程と、
最上段の円筒素材をパンチによって押圧し、前記マンドレルによって前記円筒素材の内周部を所定の径の中空孔にしつつ前記円筒素材の外周部に前記ダイスによってヘリカル歯を成形する工程と、
を備え、
噛み合わされる他のギヤとの歯当たり面にクラウニング処理を施さず、鍛造成形された前記ヘリカル歯の累積ピッチ誤差を、国際標準化規格で規定される累積ピッチ誤差規定表での精度等級のＮ６以下の累積ピッチ誤差とするヘリカルギヤの製造方法。 A method of manufacturing a helical gear including a hollow hole and a helical tooth formed on an outer peripheral portion by forging,
Parallelism of the opposing surfaces disposed in forging direction of the cylindrical material, perpendicularity of the inner peripheral portion, a step of manufacturing a coaxial degree of 0.05 or less between the inner peripheral portion and the outer peripheral portion,
Is inserted a plurality of cylindrical material into the die, inserting a mandrel into an inner peripheral portion of said plurality of cylindrical material, laminating a plurality of cylindrical material,
The top of the cylindrical material was pressed by a punch, a step of forming forms a helical tooth by the die on the outer periphery of the cylindrical material while the inner periphery of the cylindrical material into a hollow hole of a predetermined diameter by the mandrel,
With
The tooth contact surface with other gears to be meshed is not subjected to crowning treatment, and the cumulative pitch error of the forged helical tooth is N6 or less of the accuracy grade in the cumulative pitch error specification table specified by the international standardization standard A helical gear manufacturing method with a cumulative pitch error of.
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| JP2013174581A JP6040892B2 (en) | 2013-08-26 | 2013-08-26 | Manufacturing method of helical gear |
| CN201480045734.XA CN105473901B (en) | 2013-08-26 | 2014-07-10 | Helical gear and its manufacture method, geared system |
| PCT/JP2014/003683 WO2015029309A1 (en) | 2013-08-26 | 2014-07-10 | Helical gear, method for manufacturing same, and gear device |
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| JP2013174581A JP6040892B2 (en) | 2013-08-26 | 2013-08-26 | Manufacturing method of helical gear |
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| JP6040892B2 true JP6040892B2 (en) | 2016-12-07 |
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| CN112943893A (en) * | 2021-04-02 | 2021-06-11 | 河南睿辰机器人智能科技有限公司 | Durable drive gear set and speed reducer |
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| JP4210027B2 (en) * | 2000-09-20 | 2009-01-14 | 株式会社クリアテック | Helical gear forging device |
| JP4176298B2 (en) * | 2000-09-22 | 2008-11-05 | 株式会社クリアテック | Finishing forging device for internal gear and finishing forging method thereof |
| CN101016945B (en) * | 2005-10-15 | 2010-12-08 | 黄振强 | Wide tooth form relay transmission gear |
| JP4650632B2 (en) * | 2005-11-30 | 2011-03-16 | トヨタ自動車株式会社 | Gear structure and pinion gear |
| JP5246588B2 (en) * | 2008-09-10 | 2013-07-24 | 大同特殊鋼株式会社 | Gear manufacturing apparatus and method |
| JP4940255B2 (en) * | 2009-03-02 | 2012-05-30 | 株式会社ヤマナカゴーキン | Helical internal gear machining method and mold |
| JP2012152770A (en) * | 2011-01-24 | 2012-08-16 | Aisin Aw Co Ltd | Gear forming device |
| CN102672440B (en) * | 2012-04-28 | 2014-06-04 | 重庆市江津区宏盛机械制造有限公司 | Light rail output bevel wheel machining process |
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| CN105473901A (en) | 2016-04-06 |
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