JPH04253540A - Production of gear - Google Patents
Production of gearInfo
- Publication number
- JPH04253540A JPH04253540A JP3189191A JP3189191A JPH04253540A JP H04253540 A JPH04253540 A JP H04253540A JP 3189191 A JP3189191 A JP 3189191A JP 3189191 A JP3189191 A JP 3189191A JP H04253540 A JPH04253540 A JP H04253540A
- Authority
- JP
- Japan
- Prior art keywords
- teeth
- radial direction
- gear
- area ratio
- forming
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000005242 forging Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Forging (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、円筒形の素材を、外径
歯成形用歯形を備えたダイ内へ内径歯成形用歯形を備え
たパンチにより押し込むことにより、塑性加工によって
内外両歯を同時に形成する歯車の製造方法に関する。[Industrial Application Field] The present invention is capable of forming both the inner and outer teeth by plastic working by pushing a cylindrical material into a die equipped with a tooth profile for forming outer diameter teeth using a punch equipped with tooth profiles for forming inner diameter teeth. This invention relates to a method for manufacturing gears that are formed simultaneously.
【0002】0002
【従来の技術】切削加工が主流であった歯車成形分野に
、近年、例えば特開昭64ー22442号公報に記載の
如く、塑性加工技術の採用により生産性の向上を図る試
みが成されるようになってきた。しかし塑性加工技術を
積極的に採用したにしても、殊、内外両歯を備えた歯車
となると、先ず一方の歯形を鍛造成形し、次いで他方の
歯形を切削加工するか、二回に分けて片方ずつ鍛造成形
するものであった。[Prior Art] In recent years, attempts have been made to improve productivity by adopting plastic working technology in the field of gear forming, where cutting has been the mainstream, as described in Japanese Patent Application Laid-Open No. 64-22442. It's starting to look like this. However, even if plastic forming technology is actively adopted, especially when it comes to gears with both internal and external teeth, one tooth profile is first forged and then the other tooth profile is machined, or the other tooth profile is processed in two steps. Each piece was forged and formed.
【0003】0003
【発明が解決しようとする課題】歯車の鍛造成形は、高
い加工荷重を必要とすることから、装置の大型化を招く
ばかりか、装置には大きな負荷が掛るため、型の寿命が
短いといった致命的な欠点がある。又内外両歯を備えた
歯車を形成する場合は、内径歯形形成と外径歯形形成と
の二工程に分れるので、両歯形相互間の位相精度が低い
欠点もある。[Problems to be Solved by the Invention] Gear forging requires a high processing load, which not only leads to an increase in the size of the equipment, but also has fatal consequences such as shortening the life of the mold due to the heavy load placed on the equipment. There are drawbacks. In addition, when forming a gear with both internal and external teeth, the process is divided into two steps: forming the internal tooth profile and forming the external tooth profile, so there is also the drawback that the phase accuracy between the two tooth profiles is low.
【0004】0004
【課題を解決するための手段】円筒形の素材に対して荷
重を加えた場合において、放射方向より接線方向に対し
て変形させる方が、変形率が同じでも鍛造荷重は低くて
済むことが知られている。本発明は、その理論に着目し
て開発した歯車の製造方法であって、素材の放射方向に
対する断面を、成形歯車における放射方向の断面積比率
と略同面積比率に設定したことにある。[Means for solving the problem] It is known that when a load is applied to a cylindrical material, the forging load can be lowered by deforming it in the tangential direction than in the radial direction even if the deformation rate is the same. It is being The present invention is a gear manufacturing method developed based on this theory, in which the cross section of the material in the radial direction is set to approximately the same area ratio as the cross-sectional area ratio in the radial direction of the molded gear.
【0005】[0005]
【作用】素材の放射方向に対する断面が、成形歯車にお
ける断面積比率と略同面積比率に設定されることにより
、内外歯の関係が同位相であろうと、歯数が同じだろう
が異なっていようが、大きな加工荷重を必要とする放射
方向の変形率を少なくすると共に、少ない加工荷重で済
む接線方向の変形率を大きくできるから、鍛造荷重を低
く設定できる。[Operation] By setting the cross-section of the material in the radial direction to approximately the same area ratio as the cross-sectional area ratio of the molded gear, the relationship between the inner and outer teeth will be different even if they are in the same phase or have the same number of teeth. However, since the deformation rate in the radial direction, which requires a large processing load, can be reduced, and the deformation rate in the tangential direction, which requires a small processing load, can be increased, the forging load can be set low.
【0006】[0006]
【実施例】先ず本発明に係る歯車の製造方法を実施する
ための装置を、図面に基いて説明すると、図1において
、1は水平断面が円形の凹部1a内周面に外径歯成形用
歯形2を備えたダイ、3は円柱形で、周囲に内径歯形成
用歯形4を備えたパンチであり、ダイ1とパンチ3とは
同軸上に配置され、ダイ1は基台へ固定され、パンチ3
は昇降運動し、ダイ1の凹部1aに対して押し込み作動
する。[Example] First, an apparatus for carrying out the method of manufacturing a gear according to the present invention will be explained based on the drawings. In FIG. A die with a tooth profile 2 and a punch 3 are cylindrical and equipped with a tooth profile 4 for forming internal teeth around the periphery, the die 1 and the punch 3 are arranged coaxially, the die 1 is fixed to a base, punch 3
moves up and down and presses into the recess 1a of the die 1.
【0007】5は素材であって、この素材5は円筒形状
を基本とし、成形歯車の製品形状に応じて、その放射方
向に対する断面積が、その成形歯車における放射方向の
断面積比率と略同面積比率となるように設定される。Reference numeral 5 denotes a material, and this material 5 is basically cylindrical, and depending on the product shape of the molded gear, its cross-sectional area in the radial direction is approximately the same as the ratio of the cross-sectional area in the radial direction of the molded gear. The area ratio is set.
【0008】具体的な素材形状を例示すると、内外両歯
の位相が等しく、内径歯6と外径歯7とが交互に突出す
る歯車Aを形成する場合は、成形品における放射方向の
断面積A1 ーA1 、A2 ーA2 、A3 ーA3
とも略同一面積であるから、図2に示す如く、円筒形
のままで予備成形は必要ない。To give an example of a specific material shape, when forming a gear A in which both the inner and outer teeth have the same phase and the inner teeth 6 and outer teeth 7 alternately protrude, the radial cross-sectional area of the molded product A1 -A1, A2 -A2, A3 -A3
Since both have approximately the same area, they remain cylindrical and no preforming is necessary, as shown in FIG.
【0009】内外両歯の位相が異なり、内径歯6と外径
歯7とが同位相で突出するタイプの歯車Bを形成する場
合は、成形品における放射方向の断面積B1 ーB1
、B2 ーB2 、B3 ーB3 が異なるので、図3
の如く、厚肉部と薄肉部とが交互に配置される形状に予
備成形される。When forming a gear B of the type in which the inner and outer teeth have different phases and the inner and outer teeth 6 and 7 protrude in the same phase, the radial cross-sectional area of the molded product is B1 - B1
, B2 -B2 and B3 -B3 are different, so Fig. 3
It is preformed into a shape in which thick parts and thin parts are arranged alternately, as shown in FIG.
【0010】内外両歯の歯数が互いに異なる歯車Cの場
合は、成形品における放射方向の断面積C1 ーC1
、C2 ーC2、C3 ーC3 が不規則に変化してい
るので、それに応じて素材の放射方向に対する断面積も
図2に示す如く不規則に変化した形状に予備成形される
。[0010] In the case of a gear C in which the numbers of both inner and outer teeth are different from each other, the cross-sectional area in the radial direction of the molded product is C1 - C1
, C2 - C2, and C3 - C3 change irregularly, and accordingly, the cross-sectional area of the material in the radial direction is also preformed into a shape that changes irregularly as shown in FIG.
【0011】上記実施例は単なる例示にすぎず、素材の
形状は、波形の位相、歯の数、大きさによって適宜変更
されるものであり、素材は形成歯車と放射方向に対する
断面積が同面積であれば良いのであって、放射方向の長
さ(肉厚)を同じにするばかりでなく、図4に示す如く
、軸方向(高さ)により調整もできる。The above embodiment is merely an example, and the shape of the material can be changed as appropriate depending on the phase of the waveform, the number and size of teeth, and the material has the same cross-sectional area in the radial direction as the forming gear. Not only can the length (thickness) in the radial direction be made the same, but it can also be adjusted in the axial direction (height) as shown in FIG.
【0012】0012
【発明の効果】本発明によれば、円筒形の素材を少ない
加工荷重でもって、内径歯成形用歯形を備えたパンチに
より外径歯成形用歯形を備えたダイ内へ押し込み、内外
両歯を同時に成形できるので、装置を大型化しなくても
良いばかりか、両歯形相互間の位相精度アップを図るこ
とができる。According to the present invention, a cylindrical material is pushed into a die having a tooth profile for forming an outer tooth by a punch having a tooth profile for forming an inner tooth with a small processing load, and both the inner and outer teeth are formed. Since molding can be performed simultaneously, there is no need to increase the size of the device, and it is possible to improve the phase accuracy between both tooth profiles.
【図1】本発明に係る歯車製造方法に使用する成形装置
の説明図である。FIG. 1 is an explanatory diagram of a forming apparatus used in a gear manufacturing method according to the present invention.
【図2】本発明に係る素材と成形品との関係を示す説明
図である。FIG. 2 is an explanatory diagram showing the relationship between the raw material and the molded product according to the present invention.
【図3】本発明に係る素材と成形品との関係を示す別の
説明図である。FIG. 3 is another explanatory diagram showing the relationship between the raw material and the molded product according to the present invention.
【図4】本発明に係る素材と成形品との関係を示す更に
別の説明図である。FIG. 4 is yet another explanatory diagram showing the relationship between the raw material and the molded product according to the present invention.
【図5】本発明に係る歯車製造方法で使用する素材の変
更例を示す説明図である。FIG. 5 is an explanatory diagram showing an example of changing the material used in the gear manufacturing method according to the present invention.
1・・ダイ、1a・・凹部、2・・外径歯成形用歯形、
3・・パンチ、4・・内径歯成形用歯形、5・・素材、
6・・内径歯、7・・外径歯、8・・予備成形品、A、
B、C・・歯車。1...Die, 1a...Concave portion, 2...Tooth profile for forming outer diameter teeth,
3. Punch, 4. Tooth profile for forming internal teeth, 5. Material,
6. Inner tooth, 7. Outer tooth, 8. Preformed product, A.
B, C... Gears.
Claims (1)
たパンチにより外径歯成形用歯形を備えたダイ内へ押し
込んで、内外両歯を同時に成形する歯車の製造方法であ
って、前記素材の放射方向に対する断面を、成形歯車に
おける放射方向の断面積比率と略同面積比率に設定した
歯車の製造方法。1. A method for manufacturing a gear, in which both the inner and outer teeth are simultaneously formed by pushing a cylindrical material into a die having a tooth profile for forming an outer diameter tooth by using a punch having a tooth profile for forming an inner diameter tooth. A method for manufacturing a gear, wherein the cross section of the material in the radial direction is set to approximately the same area ratio as the cross-sectional area ratio in the radial direction of the molded gear.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3189191A JPH0698447B2 (en) | 1991-01-31 | 1991-01-31 | Gear manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3189191A JPH0698447B2 (en) | 1991-01-31 | 1991-01-31 | Gear manufacturing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04253540A true JPH04253540A (en) | 1992-09-09 |
JPH0698447B2 JPH0698447B2 (en) | 1994-12-07 |
Family
ID=12343650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3189191A Expired - Fee Related JPH0698447B2 (en) | 1991-01-31 | 1991-01-31 | Gear manufacturing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0698447B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105642803A (en) * | 2016-01-08 | 2016-06-08 | 盐城工学院 | Combined extrusion machining method for automobile starting guide cylinder |
-
1991
- 1991-01-31 JP JP3189191A patent/JPH0698447B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105642803A (en) * | 2016-01-08 | 2016-06-08 | 盐城工学院 | Combined extrusion machining method for automobile starting guide cylinder |
CN105642803B (en) * | 2016-01-08 | 2017-06-27 | 盐城工学院 | A kind of Compound Extrusion processing method of automobile start guide cylinder |
Also Published As
Publication number | Publication date |
---|---|
JPH0698447B2 (en) | 1994-12-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |