JPH057096B2 - - Google Patents
Info
- Publication number
- JPH057096B2 JPH057096B2 JP28114387A JP28114387A JPH057096B2 JP H057096 B2 JPH057096 B2 JP H057096B2 JP 28114387 A JP28114387 A JP 28114387A JP 28114387 A JP28114387 A JP 28114387A JP H057096 B2 JPH057096 B2 JP H057096B2
- Authority
- JP
- Japan
- Prior art keywords
- tooth
- gear
- groove
- cutting
- tooth portion
- 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
- 238000005520 cutting process Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 22
- 239000002131 composite material Substances 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Forging (AREA)
- Gears, Cams (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は複合歯車の製造方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for manufacturing a composite gear.
（従来の技術）
従来、第４図示のように基体の外周に軸方向に
並列して形状の異なる一対の歯部を備え、一方の
歯部と他方の歯部とが基体の径方向において両歯
部を形成する溝底部の位置が異なつて重合部分を
有する複合歯車が知られている。これを成形する
のには、第４図示の素材ａに、第６図の如く溝ｂ
（以下逃げ溝と称す）を刻設し、さらに、ボブカ
ツタやギアシエパ等による歯切加工により該にげ
溝ｂを挟むそれぞれ形状の異なる例えばスーパギ
アｄとヘリカルギアｃからなる歯部を形成してい
た。(Prior Art) Conventionally, as shown in FIG. 4, a pair of teeth with different shapes are provided on the outer periphery of the base body in parallel in the axial direction, and one tooth part and the other tooth part are arranged on both sides in the radial direction of the base body. A composite gear is known in which the groove bottoms forming the tooth portions have overlapping portions at different positions. To mold this, the material a shown in Fig. 4 has grooves b as shown in Fig. 6.
(hereinafter referred to as an escape groove) is carved, and furthermore, by gear cutting using a bob cutter, a gear cutter, etc., a tooth portion consisting of, for example, a super gear d and a helical gear c, each having a different shape, sandwiching the escape groove b is formed. .
しかしながら、この方法ではギアシエーパー等
による歯切加工には加工時間がかかる等の不都合
があつた。 However, this method has disadvantages such as the machining time required for gear cutting using a gear shaper or the like.
そこで、かかる不都合に対処する為に、両方の
歯部を温間鍛造で、押出成形して、歯部の成形を
行うことも考えられるが、スパーギアｄ及びヘリ
カルギアｃのように形状の異なる二つの歯車を有
する複雑な形の複合歯車を形成することは困難で
ある。 Therefore, in order to deal with this inconvenience, it is possible to form the tooth parts by warm forging and extrusion molding of both tooth parts, but it is possible to form the tooth parts by warm forging and extrusion molding. It is difficult to form complex shaped composite gears with two gears.
そこで、成形し易いスパーギアｄである一方の
歯部だけを押出成形で形成し、他方のヘリカルギ
アｃである歯部を切削具で形成する方法が考えら
れた。 Therefore, a method was devised in which only one tooth portion of the easily moldable spur gear d is formed by extrusion molding, and the other tooth portion of the helical gear c is formed using a cutting tool.
この押出成形を利用して複合歯車を成形する方
法としては、例えば第７図示の如く素材ａに歯部
ｄを備えた部材を押出成形し、次に第８図示の如
く前記両歯部ｃ，ｄを歯切加工する場合と略同形
のにげ溝ｂを設け、さらに歯部ｃを歯切加工して
第４図示の歯車を形成する方法が考えられる。 As a method of forming a composite gear using this extrusion molding, for example, as shown in FIG. A conceivable method is to provide a groove b having substantially the same shape as that in the case of gear cutting d, and further gear cutting the tooth portion c to form the gear shown in FIG.
この方法によれば、押出成形により歯部ｄを成
形するので、歯切加工は他方の歯部ｃのみとなり
製造時間を短縮することが可能である。 According to this method, since the tooth portion d is formed by extrusion molding, only the other tooth portion c is subjected to gear cutting, thereby making it possible to shorten the manufacturing time.
しかしながら、前記の方法では第８図示のよう
に、予め歯部ｄの設けられた素材ａに歯部ｃの歯
切加工のためににげ溝ｂを切削加工して形成する
と、歯部ｄの該にげ溝ｂを設けた側の端部にバリ
ｅが発生する為、該バリｅの除去に手間がかか
る。 However, in the above method, as shown in FIG. 8, if a groove b is formed by cutting a material a on which a tooth d has been previously provided in order to cut the tooth c, then the tooth d is Since a burr e is generated at the end on the side where the groove b is provided, it takes time and effort to remove the burr e.
また、この切削加工は、すでに形成された歯部
ｃを横断して行うため断続切削となりバイト等の
切削具の消耗が激しい不都合がある。 Further, since this cutting process is performed across the already formed tooth portion c, it becomes an interrupted cutting process, which is disadvantageous in that the cutting tool such as the cutting tool is severely worn out.
（解決すべき問題点）
かかる問題に対処すべく、本発明は従来に比し
て簡易にかつ短時間で製造できる複合歯車の製造
方法を提供することを目的とする。(Problems to be Solved) In order to cope with such problems, an object of the present invention is to provide a method for manufacturing a composite gear that can be manufactured more easily and in a shorter time than in the past.
（問題点を解決する為の手段）
基体の外周に軸方向に並列して形状の異なる一
対の歯部を備え、一方の歯部と他方の歯部とが基
体の径方向において両歯部を形成する溝底部の位
置が異なつて重合部分を有する複合歯車の製造方
法において、一方の歯部を押出し成形により形成
すると共に該歯部の押出し成形の際に、該歯部の
他方の歯部成形側にその歯溝を塞ぐ薄肉部を残し
て形成し、次いで、該薄肉部と他方の歯部成形位
置との間に切削加工により所定幅の溝を形成し、
次いで、他方の歯部を歯切加工により成形するこ
とを特徴とする。(Means for solving the problem) A pair of teeth with different shapes are provided in parallel in the axial direction on the outer periphery of the base, and one tooth and the other tooth connect both teeth in the radial direction of the base. In a method for manufacturing a composite gear having groove bottoms formed at different positions and overlapping portions, one tooth portion is formed by extrusion molding, and when the tooth portion is extruded, the other tooth portion of the tooth portion is formed. A thin wall portion is left on the side to close the tooth groove, and then a groove of a predetermined width is formed by cutting between the thin wall portion and the other tooth molding position,
Next, the other tooth portion is formed by gear cutting.
（作用）
かかる手段において、前記複合歯車の製造方法
は一方の歯部を押出成形によつて形成して該歯部
の形成時間を従来に比して短縮し、該一方の歯部
における他方の歯部形成側にその歯溝を塞ぐ薄肉
部を設けて前記溝を形成して、該薄肉部を設けず
に前記一方の歯部単部まで該溝を設けた場合に生
ずるバリが発生するのを防止すると共に他方の歯
部の歯切加工の際にすでに形成された一方の歯部
が損傷するのを防止する。(Function) In such a method, the method for manufacturing the composite gear shortens the time for forming one tooth portion by extrusion molding compared to the conventional method. The groove is formed by providing a thin wall portion that closes the tooth groove on the side where the tooth portion is formed, and burrs are generated when the groove is provided up to the single portion of the one tooth portion without providing the thin wall portion. This also prevents one of the teeth already formed from being damaged during gear cutting of the other tooth.
（実施例）
以下、図面に基き本発明による複合歯車の製造
方法を実施する一例について詳説する。 (Example) Hereinafter, an example of implementing the method for manufacturing a composite gear according to the present invention will be explained in detail based on the drawings.
第１図は、本発明の製造方法で製作された複合
歯車を示し、１は基体、２はにげ溝、３，４は歯
部であり、５は前記薄肉部を示す。 FIG. 1 shows a composite gear manufactured by the manufacturing method of the present invention, in which 1 is a base body, 2 is a groove, 3 and 4 are tooth portions, and 5 is the thin wall portion.
次に第１図の構成の複合歯車の形成工程を図を
用いて説明する。第２図示の基体１に歯部４を備
えた部材を押出成形する。その後、第３図示の如
く該歯部４の歯部３を形成する側の端部に所定の
厚さを有する薄肉部５を残して、該薄肉部５の該
歯部４を反対側の部分を所定のにげ溝２の形状に
切削する。 Next, the process of forming a composite gear having the configuration shown in FIG. 1 will be explained using the drawings. A member provided with tooth portions 4 is extruded onto the base body 1 shown in the second figure. Thereafter, as shown in FIG. 3, a thin part 5 having a predetermined thickness is left at the end of the tooth part 4 on the side where the tooth part 3 is formed, and the tooth part 4 of the thin part 5 is replaced with the opposite end. is cut into the shape of the predetermined groove 2.
続いて、歯切加工により歯部３を作成し、第１
図示の歯車の形状を形成する。 Next, the tooth part 3 is created by gear cutting, and the first
Form the gear shape shown.
以上の方法によれば前記の如く、一方の歯部４
を押出成形により成形しているので、該歯部４を
歯切加工する場合に比して加工時間を大幅に短縮
することができる。 According to the above method, as described above, one tooth portion 4
Since the tooth portion 4 is formed by extrusion molding, the processing time can be significantly shortened compared to the case where the tooth portion 4 is processed by gear cutting.
また、該歯部４の端部に薄肉部５を設けている
ので、歯部４の強度を補強するとともに該薄肉部
５は後に歯部３を歯切形成する際に、該歯切手段
の歯先が歯部４の複数の歯に直接触れて、該歯部
４を損傷することを防止する。 Further, since the thin wall portion 5 is provided at the end of the tooth portion 4, the strength of the tooth portion 4 is reinforced, and the thin wall portion 5 is used when cutting the tooth portion 3 later. To prevent a tooth tip from directly touching a plurality of teeth of a tooth part 4 and damaging the tooth part 4.
さらに、該薄肉部５を設けることは、該薄肉部
５を残さずに、従来のようににげ溝Ｂを加工する
場合に生ずるバリを除去する手間を回避できる。 Further, by providing the thin wall portion 5, the thin wall portion 5 is not left behind, and it is possible to avoid the trouble of removing burrs that occur when processing the groove B in the conventional manner.
（効 果）
従つて、本発明の方法によれば、前記複合歯車
は一方の歯部を押出成形によつて形成することに
より、歯部の形成時間が従来に比して短縮でき、
該歯部の他方の歯部形成側に薄肉部を設けて他の
歯部歯切加工のための溝を形成することにより、
該薄肉部をも切削除去して歯部を形成する場合に
比して、該歯部の複数の歯の間の断線切削が必要
となくなるので、バイト等の切削具の消耗を回避
することができる。また、すでに形成された一方
の歯部にバリが発生したり損傷したりすることを
防止することができるので従来に比して簡易であ
り、かつ短時間で製造できる複合歯車の製造方法
を提供することができる。(Effects) Therefore, according to the method of the present invention, by forming one tooth portion of the composite gear by extrusion molding, the time for forming the tooth portion can be shortened compared to the conventional method.
By providing a thin wall portion on the other tooth forming side of the tooth to form a groove for cutting the other tooth,
Compared to the case where the tooth portion is formed by cutting away the thin portion, there is no need to cut the wires between the plurality of teeth of the tooth portion, so it is possible to avoid wear and tear on cutting tools such as bits. can. In addition, it is possible to prevent burrs from forming or being damaged on one of the teeth that have already been formed, thereby providing a method for manufacturing a composite gear that is simpler than conventional methods and can be manufactured in a shorter time. can do.
第１図は本発明の方法により製作された複合歯
車の一例の説明的部分断面図、第２図及び第３図
は第１図示の歯車の形成工程を説明する為の説明
的部分断面図、第４図は従来の複合歯車の説明的
断面図、第５図及び第６図は第４図示の歯車の形
成工程の一例を説明する為の説明的断面図、第７
図及び第８図は第４図示の歯車の形成工程の他の
例を説明する為の説明的断面図である。
２…溝、３，４…歯部、５…薄肉部。
FIG. 1 is an explanatory partial cross-sectional view of an example of a composite gear manufactured by the method of the present invention, FIGS. 2 and 3 are explanatory partial cross-sectional views for explaining the formation process of the gear shown in FIG. FIG. 4 is an explanatory cross-sectional view of a conventional composite gear, FIGS. 5 and 6 are explanatory cross-sectional views for explaining an example of the formation process of the gear shown in FIG.
This figure and FIG. 8 are explanatory sectional views for explaining another example of the formation process of the gear shown in FIG. 4. 2...Groove, 3, 4...Tooth portion, 5...Thin wall portion.
Claims (1)
一対の歯部を備え、一方の歯部と他方の歯部とが
基体の径方向において両歯部を形成する溝底部の
位置が異なつて重合部分を有する複合歯車の製造
方法において、一方の歯部を押出し成形により形
成すると共に該歯部の押出し成形の際に、該歯部
の他方の歯部成形側にその歯溝を塞ぐ薄肉部を残
して形成し、次いで、該薄肉部と他方の歯部成形
位置との間に切削加工により所定幅の溝を形成
し、次いで、他方の歯部を歯切加工により成形す
ることを特徴とする複合歯車の製造方法。1 A pair of teeth with different shapes are provided in parallel in the axial direction on the outer periphery of the base, and one tooth and the other tooth have groove bottoms that form both teeth at different positions in the radial direction of the base. In a method for manufacturing a composite gear having an overlapping portion, one of the tooth portions is formed by extrusion molding, and when the tooth portion is extruded, a thin wall portion that closes the tooth groove is provided on the other tooth molded side of the tooth portion. A groove of a predetermined width is formed by cutting between the thin wall portion and the other tooth portion forming position, and then the other tooth portion is formed by gear cutting. A method for manufacturing composite gears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28114387A JPH01127134A (en) | 1987-11-09 | 1987-11-09 | Manufacturing method of composite gears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28114387A JPH01127134A (en) | 1987-11-09 | 1987-11-09 | Manufacturing method of composite gears |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01127134A JPH01127134A (en) | 1989-05-19 |
| JPH057096B2 true JPH057096B2 (en) | 1993-01-28 |
Family
ID=17634963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28114387A Granted JPH01127134A (en) | 1987-11-09 | 1987-11-09 | Manufacturing method of composite gears |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01127134A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3586133B2 (en) * | 1999-04-20 | 2004-11-10 | 大岡技研株式会社 | Sprocket with dog gear |
| JP5995629B2 (en) * | 2012-09-27 | 2016-09-21 | 大岡技研株式会社 | Gear with flange |
-
1987
- 1987-11-09 JP JP28114387A patent/JPH01127134A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01127134A (en) | 1989-05-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |