JP3382796B2 - Ring gear manufacturing method - Google Patents
Ring gear manufacturing methodInfo
- Publication number
- JP3382796B2 JP3382796B2 JP30804896A JP30804896A JP3382796B2 JP 3382796 B2 JP3382796 B2 JP 3382796B2 JP 30804896 A JP30804896 A JP 30804896A JP 30804896 A JP30804896 A JP 30804896A JP 3382796 B2 JP3382796 B2 JP 3382796B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical body
- gear
- gear teeth
- teeth
- ring
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000000034 method Methods 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 description 11
- 238000005553 drilling Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 4
- 238000004080 punching Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 208000008312 Tooth Loss Diseases 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Punching Or Piercing (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は自動車部品その他と
して使用されるリングギヤを製造するリングギヤの製造
方法に関するものである。
【０００２】
【従来の技術】従来、リングギヤの製造方法としては、
中実材に引き抜きによるギヤ歯加工を加えた後、穴
明け加工し、所要長さに切断して製品とする引き抜き
法、 パイプ材を所要長さに切断した後、ギヤ歯を切
削する歯切り法が公知である。
【０００３】
【発明が解決しようとする課題】ところが、の引き抜
き法では穴明け加工によるロス、歯切り法ではギヤ歯
の切削によるロスが生じ、いずれも材料コストが高くつ
くという欠点があった。
【０００４】しかも、引き抜き法では引き抜き時に、歯
切り法では歯切り時にそれぞれ不可避的に芯ぶれが生じ
るため、歯形状の精度、同軸度といった製品の品質が低
いものとなっていた。
【０００５】そこで本発明は、材料ロスが少なく、低コ
ストで、しかも歯形状の精度や同軸度の高い高品質のリ
ングギヤを得ることができるリングギヤの製造方法を提
供するものである。
【０００６】
【課題を解決するための手段】請求項１の発明は、次の
工程を具備するものである。
【０００７】（ａ）金属板材から打ち抜かれたリング板
に軸方向からプレス絞り曲げ加工を加えることにより、
上記リング板の一方の面が内周面、他方の面が外周面と
なった筒状体を得るマウント工程。
【０００８】（ｂ）前方押出し加工により、上記筒状体
の周壁に、一端側に非加工部を残してギヤ歯を形成する
歯付け工程。
【０００９】（ｃ）上記歯付け工程によって得られた歯
付き筒状体を一次製品として、この歯付き筒状体を、同
筒状体のギヤ歯に噛み合うギヤ歯をもった型内に入れ、
パンチングすることにより、非加工部に、加工部に連続
するギヤ歯を形成する歯抜き工程。
【００１０】上記方法によると、リング板に軸方向から
プレス絞り曲げ加工を加えることによって筒状体を作製
し、この筒状体に冷間鍛造法の一種である前方押出し加
工によってギヤ歯を形成するため、引き抜き法や歯切り
法と比較して、素材の芯ぶれがなく、歯形状の精度、同
軸度をともに高くすることができる。
【００１１】しかも、穴明け加工やギヤ歯の切削加工に
よるロスがなく、材料ロスを最小限に抑えることができ
る。
【００１２】ところで、上記のようにプレス絞り曲げ加
工によって得られた筒状体に前方押出しによってギヤ歯
を形成する方法によると、歯付き筒状体の軸方向一側
に、ギヤ歯が加工されない非加工部分が生じる。
【００１３】ここで、リングギヤの種類や用途によって
はこの非加工部分を除去する必要があるが、その手段と
して非加工部分を切断すると、材料ロスが多くなる。
【００１４】この点、上記方法によると、歯付け工程後
の歯抜き工程において、歯付け工程によって得られた歯
付き筒状体を、同筒状体のギヤ歯に噛み合うギヤ歯をも
った型内に入れ、パンチングすることにより、非加工部
分にもギヤ歯を形成し、歯の谷に当たる部分のみを抜き
滓として除去するため、材料ロスが最小限に少なくてす
む。
【００１５】
【発明の実施の形態】本発明の実施形態を図によって説
明する。
【００１６】図１（イ）〜（ホ）にこの方法によるリン
グギヤ製造工程を示している。
【００１７】まず、ステンレス鋼、アルミ合金等の金属
平板材からプレス機による打ち抜き穴明け加工によって
（イ）に示すリング板Ａ１を作る。
【００１８】次に、マウント工程に移り、図２に示すよ
うにこのリング板Ａ１をダイス１内に収容し、図３に示
すようにパンチ２によってこのリング板Ａ１に軸方向か
らプレス絞り曲げ加工を行う。
【００１９】このプレス絞り曲げ加工により、図１
（ロ）および図４に示すようにリング板Ａ１の片面ａが
内周面、他方の面ｂが外周面となった筒状体Ａ２を製作
する。
【００２０】この後、歯付け工程に移り、冷間鍛造法の
一種である前方押出し法、すなわち、図５，６に示すよ
うに内周ギヤ歯３ａを持ったダイス３内に筒状体Ａ２を
収容し、パンチ４で軸方向に加圧することにより、筒状
体Ａ２の周壁を内周ギヤ歯３ａに沿って押出し方向に流
動させ、図１（ハ）に示すように外周にギヤ歯ｃを持っ
た筒状体Ａ３を製作する。
【００２１】このとき、前方押出し法の加工原理上、押
出し方向の後端部にギヤ歯を持たない非加工部ｄが残さ
れる。
【００２２】そこで次に、非加工部ｄを取り除くために
図７，８に示す歯抜き工程に移る。
【００２３】この歯抜き工程では、
（ｉ）ギヤ歯付き筒状体Ａ３を、これのギヤ歯ｃに対応
する内周ギヤ歯５ａを備えたダイス５ａ内に、互いのギ
ヤ歯ｃ，５ａが噛み合う状態で収容し、
（ii）ギヤ歯ｃに対応する外周ギヤ歯６ａを備えたパン
チ６を、互いのギヤ歯ｃ，６ａが周方向に一致する状態
で配置し、
（iii）このパンチ６でギヤ歯付き筒状体Ａ３を軸方向
に加圧する。
【００２４】これにより、ギヤ歯付き筒状体Ａ３の非加
工部ｄの外周面に、すでに加工されたギヤ歯ｃに連続す
るギヤ歯ｃ´が形成される。
【００２５】こうすれば、ギヤ歯ｃ´の谷に当たる部分
のみを抜き滓ｅ（図８に示す）として除去するため、非
加工部ｄ全体を切除する場合と比較して材料ロスが最小
限に少なくてすむ。
【００２６】こうして、図１（ニ）に示す製品リングギ
ヤＡ４が製作され、必要に応じ、図１（ホ）に示すよう
に成形鍛造による仕上げを加えて最終製品となる。
【００２７】ところで、上記実施形態では外周にギヤ歯
を備えたリングギヤを製造する場合を例にあげたが、本
発明は内周ギヤ歯を備えたリングギヤについても上記同
様に適用することができる。
【００２８】
【発明の効果】上記のように本発明によるときは、リン
グ板に軸方向からプレス絞り曲げ加工を加えることによ
って筒状体を作製し、この筒状体に前方押出し加工によ
ってギヤ歯を形成するため、従来の引き抜き法や歯切り
法と比較して、素材の芯ぶれがなく、歯形状の精度、同
軸度をともに高くすることができる。
【００２９】しかも、穴明け加工やギヤ歯の切削加工に
よるロスがなく、材料ロスを最小限に抑えることができ
る。
【００３０】これにより、低コストで高品質のリングギ
ヤを得ることができる。
【００３１】また、歯抜き工程において、上記歯付き筒
状体を、同筒状体のギヤ歯に対応するギヤ歯をもった型
内に入れ、パンチングすることにより、非加工部分にも
ギヤ歯を形成するため、歯の谷に当たる部分のみが抜き
滓として除去される。
【００３２】このため、非加工部分全体を切除する場合
と比較して、材料ロスが最小限に少なくてすむ。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a ring gear for manufacturing a ring gear used as an automobile part or the like. [0002] Conventionally, as a method of manufacturing a ring gear,
After pulling gear teeth into solid material, drilling, drilling, cutting to required length to produce product, cutting pipe material to required length, gear cutting to cut gear teeth The method is known. [0003] However, the draw-out method causes a loss due to drilling, and the gear-cutting method causes a loss due to cutting of gear teeth. In addition, the pulling method inevitably causes misalignment at the time of pulling and the gear cutting method at the time of gear cutting, so that the quality of the product such as the precision of the tooth shape and the coaxiality is low. Accordingly, the present invention provides a method of manufacturing a ring gear capable of obtaining a high-quality ring gear with low tooth loss, low cost, and high tooth shape accuracy and coaxiality. The invention according to claim 1 includes the following steps. (A) By subjecting a ring plate punched from a metal plate material to press drawing bending in the axial direction,
A mounting step of obtaining a cylindrical body in which one surface of the ring plate is an inner peripheral surface and the other surface is an outer peripheral surface. (B) A gearing step of forming gear teeth on the peripheral wall of the cylindrical body by leaving a non-machined portion on one end side by forward extrusion. (C) The teeth obtained by the above-mentioned toothing step
The cylindrical body with teeth is used as the primary product, and this cylindrical body with teeth is
Put it in a mold with gear teeth that mesh with the gear teeth of the cylindrical body,
Continuous to non-processed part and processed part by punching
Gear removal process for forming gear teeth to be engaged. According to the above method, a cylindrical body is produced by subjecting a ring plate to press drawing bending from an axial direction, and gear teeth are formed on the cylindrical body by forward extrusion, which is a kind of cold forging method. Therefore, compared to the drawing method and the gear cutting method, there is no deviation of the material, and both the precision and coaxiality of the tooth shape can be increased. Furthermore, there is no loss due to drilling or gear tooth cutting, and material loss can be minimized. According to the method of forming gear teeth by forward extrusion on a cylindrical body obtained by press drawing bending as described above, no gear teeth are formed on one axial side of the toothed cylindrical body. Unprocessed parts occur. Here, it is necessary to remove the non-processed portion depending on the type and use of the ring gear. However, if the non-processed portion is cut as a means, material loss increases. In this respect, according to the above method, after the toothing step,
In the tooth extraction step, the toothed cylindrical body obtained in the toothing step is put into a mold having gear teeth meshing with the gear teeth of the cylindrical body, and punching is performed, so that the gear is formed on the non-processed portion. Since the teeth are formed and only the portions that hit the valleys of the teeth are removed as slag, material loss is minimized. Embodiments of the present invention will be described with reference to the drawings. FIGS. 1A to 1E show a ring gear manufacturing process according to this method. First, a ring plate A1 shown in (a) is made from a flat metal plate made of stainless steel, aluminum alloy or the like by punching using a press machine. Next, the process proceeds to a mounting step. As shown in FIG. 2, this ring plate A1 is housed in a die 1, and as shown in FIG. I do. By this press drawing bending, FIG.
(B) As shown in FIG. 4 and FIG. 4, a cylindrical body A2 in which one surface a of the ring plate A1 is an inner peripheral surface and the other surface b is an outer peripheral surface. Thereafter, the process proceeds to a toothing step, in which a cylindrical body A2 is placed in a die 3 having internal gear teeth 3a as shown in FIGS. And the peripheral wall of the cylindrical body A2 is caused to flow in the pushing direction along the inner peripheral gear teeth 3a by being pressed in the axial direction by the punch 4, and as shown in FIG. The cylindrical body A3 having the above is manufactured. At this time, due to the processing principle of the forward extrusion method, a non-processed portion d having no gear teeth is left at the rear end in the extrusion direction . Then, in order to remove the non-processed portion d, the process proceeds to the gear extraction process shown in FIGS. In the gear removal step, (i) the cylindrical body A3 with the gear teeth is placed in a die 5a having the inner peripheral gear teeth 5a corresponding to the gear teeth c, and the gear teeth c and 5a of each other. (Ii) a punch 6 having outer peripheral gear teeth 6a corresponding to the gear teeth c is arranged in a state where the gear teeth c and 6a coincide with each other in the circumferential direction; and (iii) the punch 6 Presses the cylindrical body A3 with gear teeth in the axial direction. As a result, a gear tooth c 'which is continuous with the already processed gear tooth c is formed on the outer peripheral surface of the non-processed portion d of the cylindrical body A3 with gear teeth. In this way, since only the portion corresponding to the valley of the gear tooth c 'is removed as scrap e (shown in FIG. 8), material loss is minimized as compared with the case where the entire non-processed portion d is cut off. I need less. Thus, the product ring gear A4 shown in FIG. 1 (d) is manufactured and, if necessary, is finished by forming and forging as shown in FIG. 1 (e) to obtain a final product. In the above-described embodiment, the case of manufacturing a ring gear having gear teeth on the outer periphery has been described as an example. However, the present invention can be similarly applied to a ring gear having inner gear teeth. As described above, according to the present invention, a cylindrical body is produced by press-drawing and bending the ring plate from the axial direction, and the gear teeth are formed by extruding the cylindrical body forward. As compared with the conventional drawing method and the gear cutting method, the material is free of core deviation, and both the accuracy and coaxiality of the tooth shape can be increased. Furthermore, there is no loss due to drilling or gear tooth cutting, and material loss can be minimized. Thus, a high quality ring gear can be obtained at low cost. Further , in the gear removing step, the toothed cylindrical body is put into a mold having gear teeth corresponding to the gear teeth of the cylindrical body, and is punched, so that the gear teeth are formed on the non-processed portion. Is formed, only the portion corresponding to the tooth valley is removed as a slag. Therefore, material loss can be minimized as compared with the case where the entire non-processed portion is cut off.
【図面の簡単な説明】
【図１】（イ)(ロ)(ハ)(ニ)(ホ）は本発明の実施形態に
かかるリングギヤの製造方法の各工程を示し、（イ）は
金属平板材からリング板を打ち抜いた状態、（ロ）はこ
のリング板にプレス絞り曲げ加工を加えて筒状体とした
状態、（ハ）はこの筒状体にギヤ歯を形成した状態、
（ニ）は非加工部にギヤ歯を形成した状態、（ホ）は仕
上げ加工を加えた状態をそれぞれ示す断面図である。
【図２】プレス絞り曲げ加工前の状態を示す断面図であ
る。
【図３】プレス絞り曲げ加工途中の状態を示す断面図で
ある。
【図４】プレス絞り曲げ加工後の状態を示す断面図であ
る。
【図５】歯付け加工前の状態を示す断面図である。
【図６】歯付け加工後の状態を示す断面図である。
【図７】歯抜き加工前の状態を示す断面図である。
【図８】歯付け加工後の状態を示す断面図である。
【符号の説明】
Ａ１ リング板
Ａ２ 筒状体
ａ 筒状体の内周面
ｂ 筒状体の外周面
１ 筒状体を得る型としてのダイス
２ 同パンチ
Ａ３ ギヤ歯付き筒状体
ｃ 同筒状体のギヤ歯
ｄ 非加工部
３ ギヤ歯付き筒状体を得る型としてのダイス
３ａ 同ダイスの内周ギヤ歯
４ 同パンチ
Ａ４ 歯抜き工程を経て得られたリングギヤ
５ 歯抜き加工に使用されるダイス
５ａ ダイスの内周ギヤ歯
６ パンチ
６ａ パンチの外周ギヤ歯BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a), (b), (c), (d), and (e) show steps of a method of manufacturing a ring gear according to an embodiment of the present invention, and (a) shows a metal plate. A state in which a ring plate is punched out of a material, (b) a state in which the ring plate is press-drawn and bent to form a cylindrical body, (c) a state in which gear teeth are formed in the cylindrical body,
(D) is a cross-sectional view showing a state in which gear teeth are formed in a non-processed portion, and (E) is a cross-sectional view showing a state in which finishing is performed. FIG. 2 is a sectional view showing a state before press drawing bending. FIG. 3 is a cross-sectional view showing a state during press drawing bending. FIG. 4 is a sectional view showing a state after press drawing bending. FIG. 5 is a cross-sectional view showing a state before toothing. FIG. 6 is a cross-sectional view showing a state after toothing. FIG. 7 is a cross-sectional view showing a state before tooth extraction. FIG. 8 is a cross-sectional view showing a state after toothing. [Description of Signs] A1 Ring plate A2 Cylindrical body a Inner peripheral surface of cylindrical body b Outer peripheral surface of cylindrical body 1 Die as mold for obtaining cylindrical body 2 Punch A3 Cylindrical body with gear teeth c Cylindrical body Gear teeth d of the body D Non-processed part 3 Die 3a as a mold for obtaining a cylindrical body with gear teeth 4 Inner peripheral gear teeth 4 of the same die Punch A4 Ring gear 5 obtained through the gear removal process 5 Used for gear removal Die 5a Inner peripheral gear teeth 6 Punch 6a Punch outer peripheral gear teeth
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ２１Ｊ 5/06 Ｂ２１Ｊ 5/06 Ｂ (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 B21D 5/01 B21D 22/20 - 22/30 B21D 51/00 - 51/54 B21D 53/86 - 53/88 ────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. 7 identification code FI B21J 5/06 B21J 5/06 B (58) Investigated field (Int.Cl. 7 , DB name) B21J 1/00-13 / 14 B21J 17/00-19/04 B21K 1/00-31/00 B21D 5/01 B21D 22/20-22/30 B21D 51/00-51/54 B21D 53/86-53/88
Claims (1)
ングギヤの製造方法。 （ａ）金属板材から打ち抜かれたリング板に軸方向から
プレス絞り曲げ加工を加えることにより、上記リング板
の一方の面が内周面、他方の面が外周面となった筒状体
を得るマウント工程。 （ｂ）前方押出し加工により、上記筒状体の周壁に、一
端側に非加工部を残してギヤ歯を形成する歯付け工程。（ｃ）上記歯付け工程によって得られた歯付き筒状体を
一次製品として、この歯付き筒状体を、同筒状体のギヤ
歯に噛み合うギヤ歯をもった型内に入れ、パンチングす
ることにより、非加工部に、加工部に連続するギヤ歯を
形成する歯抜き工程。 (57) [Claims 1] A method for manufacturing a ring gear, comprising the following steps. (A) By applying a press drawing bending process in the axial direction to a ring plate punched from a metal plate material, a cylindrical body having one surface of the ring plate as an inner peripheral surface and the other surface as an outer peripheral surface is obtained. Mounting process. (B) a gearing step of forming gear teeth on the peripheral wall of the tubular body by leaving a non-machined portion at one end side by forward extrusion. (C) The toothed cylindrical body obtained by the above-described toothing step
As a primary product, this toothed cylindrical body is
Punch in a mold with gear teeth that mesh with the teeth
In this way, the gear teeth that are continuous with the processed part
Tooth extraction process to be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30804896A JP3382796B2 (en) | 1996-11-19 | 1996-11-19 | Ring gear manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30804896A JP3382796B2 (en) | 1996-11-19 | 1996-11-19 | Ring gear manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10146642A JPH10146642A (en) | 1998-06-02 |
| JP3382796B2 true JP3382796B2 (en) | 2003-03-04 |
Family
ID=17976262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30804896A Expired - Lifetime JP3382796B2 (en) | 1996-11-19 | 1996-11-19 | Ring gear manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3382796B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5300275B2 (en) | 2008-01-25 | 2013-09-25 | キヤノン株式会社 | Method for manufacturing metal member having a plurality of protrusions |
| CN103909148B (en) * | 2014-03-28 | 2016-04-27 | 苏州金诚轴承有限公司 | A kind of processing method of cylinder-shaped thin wall ring |
| JP6616027B1 (en) * | 2019-01-30 | 2019-12-04 | 日鉄日新製鋼株式会社 | Manufacturing method of cylindrical rotating parts |
| KR102421548B1 (en) * | 2020-03-30 | 2022-07-15 | (주)맥스링솔루션 | Multi working apparatus |
-
1996
- 1996-11-19 JP JP30804896A patent/JP3382796B2/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| JPH10146642A (en) | 1998-06-02 |
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