JPH0256980B2 - - Google Patents
Info
- Publication number
- JPH0256980B2 JPH0256980B2 JP59007928A JP792884A JPH0256980B2 JP H0256980 B2 JPH0256980 B2 JP H0256980B2 JP 59007928 A JP59007928 A JP 59007928A JP 792884 A JP792884 A JP 792884A JP H0256980 B2 JPH0256980 B2 JP H0256980B2
- Authority
- JP
- Japan
- Prior art keywords
- tooth profile
- reverse
- chamfer
- inner diameter
- cold
- 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
- 238000010273 cold forging Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は、チヤンフアー部およびギヤー抜け防
止用の逆テーパー部を有する自動車用リバースギ
ヤーの製造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an automobile reverse gear having a chamfer portion and a reverse tapered portion for preventing gear slippage.
従来、自動車用リバースギヤーは熱間または冷
間鍛造材よりの機械加工で歯形切前形状に加工
し、歯切盤で歯形部加工をした後、チヤンフアー
リングマシーン等でチヤンフアー部を加工の上、
さらにシエービングカツターまたは転造等で歯形
部に逆テーパーを付けて製造している。 Conventionally, automobile reverse gears are machined from hot or cold forged material into a pre-toothed shape, machined with a gear cutting machine, and then machined with a chamfer ring machine or the like. ,
Furthermore, it is manufactured by adding a reverse taper to the tooth profile using a shaving cutter or rolling.
かかる従来技術の問題点としては、歯車部品に
共通しているが、歯形部の加工を刃物で行なうた
め、歩留りが低いばかりでなく、各種の工程を必
要とするので、それに応じた多品種、多量の機械
の設置を必要とし、かつそれらを収容するための
建屋さらにはこれらの機械のメンテナンスなど多
額の投資と運転費用を要することが挙げられる。
さらに、製造タクトについても、各種機械を使用
するため、30〜60秒程度となつており、生産性に
ついても問題がある。 Problems with this conventional technology are common to gear parts, but since the tooth profile is processed with a cutter, not only is the yield low, but also various processes are required. It requires the installation of a large number of machines, a building to house them, and maintenance of these machines, which requires a large amount of investment and operating costs.
Furthermore, the manufacturing takt time is approximately 30 to 60 seconds due to the use of various machines, and there are also problems with productivity.
本発明は、上記問題点を解決した精度の高い自
動車用リバースギヤーを提供するもので、歯形部
加工の歩留り向上、プレス作業のタクトの短縮、
設備の建屋面積の減少などを目的とするものであ
る。 The present invention provides a highly accurate reverse gear for automobiles that solves the above-mentioned problems, and improves the yield of tooth profile machining, shortens the tact time of press work, and
The purpose is to reduce the building area for equipment.
本発明は、素材を冷間鍛造してチヤンフアー部
およびストレート部を有する歯形部とボス部を成
形し、該ストレート部には冷間鍛造によつて逆テ
ーパー加工を行ない、ついで、このように加工さ
れた素材を、歯形部における逆テーパー部に３点
以上にて掴持し、内径を加工することを特徴とす
る自動車用リバースギヤーの製造法である。 In the present invention, a material is cold-forged to form a tooth profile portion and a boss portion having a chamfer portion and a straight portion, and the straight portion is subjected to reverse taper processing by cold forging, and then processed in this manner. This method of manufacturing a reverse gear for an automobile is characterized in that the material is gripped at three or more points on the inverted tapered part of the tooth profile and the inner diameter is machined.
第１図は本発明の実施例により得られたリバー
スギヤーの一部の斜視図を示すもので、歯形部１
の端部にはチヤンフアー部２を形成してある。こ
の歯形部１およびチヤンフアー部２は冷間鍛造に
より形成したもので、歯形部１のストレート部に
は、これも冷間鍛造による逆テーパー部３を形成
してある。そして、内径部４は偏心することなく
精密に仕上げられたものである。 FIG. 1 shows a perspective view of a part of a reverse gear obtained according to an embodiment of the present invention.
A chamfer portion 2 is formed at the end of the tube. The tooth profile part 1 and the chamfer part 2 are formed by cold forging, and the straight part of the tooth profile part 1 has a reverse tapered part 3 formed by cold forging. The inner diameter portion 4 is precisely finished without eccentricity.
逆テーパー部３は、第２図に概念図で示したよ
うに、互に噛合するギヤーの歯形部１，１′にそ
れぞれ形成し、一方の歯形部１′の先端が他方の
歯形部１，１間のやや狭いところから嵌入し、抜
けにくくなるようにしたものである。逆テーパー
部３は一方の歯形部１に設けるのみで、他方の歯
形部１′はストレート部のままでも抜け防止には
役立つ。 As shown in the conceptual diagram in FIG. 2, the reverse tapered portions 3 are formed on the toothed portions 1 and 1' of the gears that mesh with each other, so that the tip of one toothed portion 1' connects to the other toothed portion 1, It is designed to fit in from a slightly narrow place between the holes, making it difficult to come out. Even if the inverse tapered part 3 is provided only on one tooth profile part 1 and the other tooth profile part 1' remains a straight part, it is useful for preventing slippage.
かかるギヤーは冷間鍛造でつくるため、精度の
高いものを容易に得ることができる。 Since such gears are made by cold forging, they can easily be made with high precision.
この製造法を図面に基づいて具体的に説明する
と、第３図に示す歯形素材Ｍを第４図イに示すよ
うに成形型６に挿入し、冷間鍛造により歯形部１
並びにボス部を押出成形する。そのとき同時に第
４図ロに示すようにチヤンフアー部２も成形す
る。 To specifically explain this manufacturing method based on the drawings, the tooth profile material M shown in FIG. 3 is inserted into the mold 6 as shown in FIG.
Also, the boss portion is extruded. At the same time, the chamfer portion 2 is also formed as shown in FIG. 4B.
ついで、第５図イ，ロに示すように、コイニン
グプレスによつて歯形部１に逆テーパー部３を冷
間加工して形成する。 Next, as shown in FIGS. 5A and 5B, a reverse taper portion 3 is cold-worked into the tooth profile portion 1 using a coining press.
逆テーパー部３を形成した素材は、第６図に示
すように、該逆テーパー部３のところにおいて、
ピツチ円径上、リード方向にテーパーを有するチ
ヤツクによつて少なくとも３点ａ，ｂ，ｃで掴持
し、内径４を加工する。 As shown in FIG. 6, the material forming the inverted tapered portion 3 has the following properties at the inverted tapered portion 3:
It is gripped at at least three points a, b, and c by a chuck tapered in the lead direction on the pitch circle diameter, and the inner diameter 4 is machined.
本発明製造法によれば、歯形部およびチヤンフ
アー部を冷間鍛造で成形するため、歯形部を切削
加工するために要していた多品種、多量の機械を
必要としなくなり、材料のロスが少なくなつて歩
留りが向上する。また、内径の加工は、歯形部の
逆テーパー部によつて、ピツチ円径上、リード方
向にテーパーを有するチヤツクを使用して少なく
とも３点で掴持して行なうことにより、チヤツキ
ングは確実となり、素材の加工時のぶれが少なく
なつて、偏心のない正確な内径加工ができる。さ
らに本発明によれば、プレス作業によるタクトが
５秒程度に短縮され、前述のように生産性が向上
するために、従来設備に対する機械台数の圧縮、
収容建屋面積の減少、ひいては投資額、運転資金
の圧縮が計れる利点がある。 According to the manufacturing method of the present invention, since the tooth profile part and the chamfer part are formed by cold forging, it is no longer necessary to use a large number of machines of various types that were required to cut the tooth profile part, and there is less loss of material. The yield will improve over time. In addition, when machining the inner diameter, chucks are gripped at at least three points using a chuck tapered in the lead direction on the pitch circle diameter by the inversely tapered part of the tooth profile, thereby ensuring reliable chucking. There is less wobbling when machining the material, allowing accurate inner diameter machining without eccentricity. Furthermore, according to the present invention, the takt time for press work is shortened to about 5 seconds, and productivity is improved as described above, thereby reducing the number of machines compared to conventional equipment.
This has the advantage of reducing the area of the housing building, which in turn reduces the investment amount and working capital.
第１図は本発明の実施例により得られたギヤー
の一部斜視図、第２図は本発明ギヤーの嵌合状態
の説明図、第３図は本発明方法の加工素材の正面
図、第４図イは成形時の断面図、同ロは歯形部の
正面図、第５図イは製品の断面図、同ロは歯形部
の正面図、第６図は内径加工時の掴持点を示す図
である。
１，１′……歯形部、２……チヤンフアー部、
３……逆テーパー部、４……内径部、５……ボス
部、６……成形型。
FIG. 1 is a partial perspective view of a gear obtained by an embodiment of the present invention, FIG. 2 is an explanatory diagram of a fitted state of the gear of the present invention, and FIG. 3 is a front view of a material processed by the method of the present invention. Figure 4A is a cross-sectional view during molding, Figure 4B is a front view of the tooth profile, Figure 5A is a cross-sectional view of the product, Figure 4B is a front view of the tooth profile, and Figure 6 shows the gripping point during inner diameter machining. FIG. 1, 1'... tooth profile part, 2... chamfer part,
3... Reverse taper part, 4... Inner diameter part, 5... Boss part, 6... Molding mold.
Claims (1)
トレート部を有する歯形部およびボス部を成形
し、該ストレート部に冷間鍛造によつて逆テーパ
ー加工を行ない、ついで、このように加工された
素材を、歯形部における逆テーパー部に３点以上
にて掴持し、内径を加工することを特徴とする自
動車用リバースギヤーの製造法。1. A material is cold-forged to form a tooth profile portion and a boss portion having a chamfer portion and a straight portion, and the straight portion is subjected to reverse taper processing by cold forging, and then the material processed in this manner is A method for manufacturing a reverse gear for an automobile, characterized in that the reverse tapered part of the tooth profile is gripped at three or more points and the inner diameter is machined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP792884A JPS60152340A (en) | 1984-01-21 | 1984-01-21 | Reverse gear for automobile and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP792884A JPS60152340A (en) | 1984-01-21 | 1984-01-21 | Reverse gear for automobile and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60152340A JPS60152340A (en) | 1985-08-10 |
| JPH0256980B2 true JPH0256980B2 (en) | 1990-12-03 |
Family
ID=11679181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP792884A Granted JPS60152340A (en) | 1984-01-21 | 1984-01-21 | Reverse gear for automobile and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60152340A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111730021B (en) * | 2020-06-19 | 2022-03-01 | 江苏智造新材有限公司 | Forging process of combined tooth |
-
1984
- 1984-01-21 JP JP792884A patent/JPS60152340A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60152340A (en) | 1985-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |