JP2588808B2 - Molding method for cup-shaped toothed products - Google Patents
Molding method for cup-shaped toothed productsInfo
- Publication number
- JP2588808B2 JP2588808B2 JP3332187A JP33218791A JP2588808B2 JP 2588808 B2 JP2588808 B2 JP 2588808B2 JP 3332187 A JP3332187 A JP 3332187A JP 33218791 A JP33218791 A JP 33218791A JP 2588808 B2 JP2588808 B2 JP 2588808B2
- Authority
- JP
- Japan
- Prior art keywords
- peripheral wall
- cup
- punch
- corner
- press
- 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
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、油圧クラッチのインナ
部材（クラッチインナ）等に用いられるカップ状歯付製
品の成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a cup-shaped toothed product used for an inner member (clutch inner) of a hydraulic clutch.
【０００２】[0002]
【従来の技術】従来、カップ状素材の周壁を周方向に間
隔を存して配置した放射方向に進退自在な複数のパンチ
により内方に押し込んで該周壁に歯形をプレス成形する
方法は実公昭６１−３０７４７号公報等により知られて
おり、このものでは各パンチを素材周壁に該周壁の素材
底壁とのコーナ部に亘って押し合てるようにしている。2. Description of the Related Art Conventionally, a method of pressing a peripheral shape of a cup-shaped material inward by a plurality of radially movable punches arranged at intervals in a circumferential direction and pressing a tooth profile on the peripheral wall is disclosed in Japanese Utility Model Application. It is known from, for example, Japanese Patent Application Laid-Open No. 61-30747, in which punches are pressed against a peripheral wall of a material over a corner portion of the peripheral wall with the bottom wall of the material.
【０００３】[0003]
【発明が解決しようとする課題】上記のものでは、図４
に示す如く、パンチａがカップ状素材Ｗの周壁Ｗａと底
壁Ｗｂとのコーナ部Ｗｃに食い込んで素材Ｗの底面に余
肉の盛上り部ｂができ、製品が例えばクラッチインナで
あるときは、底面に対向配置されるクラッチアウタの側
板部に盛上り部ｂが干渉するため、後加工で盛上り部を
除去する必要があって、工程数が増す不具合がある。
尚、特開昭６２−１４２０４０号公報により、素材コー
ナ部から母線方向に少許離れた周壁部分にパンチを押し
合てて歯形を成形するものも知られているが、これでは
コーナ部寄りの周壁部分が母線方向の断面においてＬ形
に屈曲され、応力集中によるクラックが入り易くなる。
本発明は、以上の点に鑑み、素材底面に余肉が盛上らな
いように且つ周壁の母線方向断面における急激な形状変
化部を生ずることなく歯形をプレス成形し得る方法を提
供することをその目的としている。In the above, FIG.
As shown in the figure, when the punch a cuts into the corner Wc of the peripheral wall Wa and the bottom wall Wb of the cup-shaped material W to form a bulged portion b on the bottom surface of the material W, and when the product is, for example, a clutch inner, However, since the raised portion b interferes with the side plate portion of the clutch outer that is disposed opposite to the bottom surface, it is necessary to remove the raised portion by post-processing, and there is a problem that the number of steps increases.
According to Japanese Patent Application Laid-Open No. Sho 62-142040, it is also known to form a tooth profile by pressing a punch against a peripheral wall portion slightly away from the material corner in the generatrix direction, but in this case, a peripheral wall closer to the corner is used. The portion is bent into an L shape in the cross section in the generatrix direction, and cracks due to stress concentration are likely to occur.
In view of the above, the present invention provides a method capable of press-forming a tooth profile so that excess thickness does not rise on the bottom surface of the material and without abrupt shape change portions in the cross section in the generatrix of the peripheral wall. That is the purpose.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成すべく、
本発明は、カップ状素材の周壁を周方向に間隔を存して
配置した放射方向内方に進退自在な複数のパンチにより
内方に押し込んで該周壁に歯形をプレス成形する方法に
おいて、各パンチにカップ状素材の底壁の厚みに相当す
る逃げ部を形成し、カップ状素材の周壁に各パンチを該
周壁の素材底壁とのコーナ部に該各パンチが食い込まな
いように押し合てて前記歯形をプレス成形すると共に、
各パンチによる前記周壁の押し込みに伴い前記コーナ部
の肉を内方に引き込んで該コーナ部を凹入形状に形成す
ることを特徴とする。In order to achieve the above object,
The present invention provides a method of press-forming a tooth profile on a peripheral wall of a cup-shaped material by pressing the peripheral wall of the cup-shaped material inward with a plurality of radially inwardly movable punches arranged at intervals in a circumferential direction to press-mold a tooth profile on the peripheral wall. To form a relief portion corresponding to the thickness of the bottom wall of the cup-shaped material, and press each punch on the peripheral wall of the cup-shaped material so that each punch does not bite into the corner portion of the peripheral wall with the material bottom wall. Press-forming the tooth profile ,
As the peripheral wall is pushed by each punch, the corner portion
The meat is pulled inward and the corner is formed in a concave shape.
Characterized in that that.
【０００５】[0005]
【作用】素材の周壁と底壁とのコーナ部にパンチが食い
込まないため、素材底面に余肉の盛上りは生じない。ま
た、パンチはコーナ部に対し底壁の厚み分逃げるだけで
あるため、周壁の押し込みに伴いコーナ部の肉が内方に
引き込まれて、コーナ部も凹入形状に成形され、母線方
向断面における周壁の急激な形状変化は生じない。[Function] Since the punch does not penetrate into the corner between the peripheral wall and the bottom wall of the material, there is no swelling of the excess thickness on the bottom surface of the material. Also, since the punch only escapes by the thickness of the bottom wall with respect to the corner portion, the meat of the corner portion is drawn inward with the pushing of the peripheral wall, the corner portion is also formed into a concave shape, and No abrupt shape change of the peripheral wall occurs.
【０００６】[0006]
【実施例】図１及び図２を参照して、１は外周面に製品
の歯形に対応する歯溝１ａを形成したダイを示し、該ダ
イ１の周囲に周方向に間隔を存して複数のパンチ２を放
射方向内方に進退自在に配置し、絞り成形された板金製
のカップ状素材Ｗを下向きにしてダイ１に被せ、図示し
ない上型の下降により、図３に示す如く、上型に垂設し
たドライバカム３を介してパンチ２を放射方向内方に前
進させ、上型に設けたパッド４により素材底壁Ｗｂをダ
イ１との間に挾圧した状態でパンチ２により素材Ｗの周
壁Ｗａをダイ１の歯溝１ａに押し込んで周壁Ｗａに歯形
をプレス成形するようにした。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, reference numeral 1 denotes a die having a tooth groove 1a corresponding to the tooth profile of a product formed on an outer peripheral surface thereof. The punch 2 is disposed so as to be able to advance and retreat inward in the radial direction, and the drawn sheet metal cup-shaped material W is placed on the die 1 with the downward facing downward, and the upper die (not shown) is moved downward as shown in FIG. The punch 2 is advanced inward in the radial direction via a driver cam 3 vertically mounted on the mold, and the material is pressed by the punch 2 while the material bottom wall Wb is pressed between the die 1 and the pad 4 provided on the upper mold. The peripheral wall Wa of W was pushed into the tooth groove 1a of the die 1 to press-mold a tooth profile on the peripheral wall Wa.
【０００７】パンチ２には、素材Ｗの周壁Ｗａと底壁Ｗ
ｂとのコーナ部Ｗｃに対する底壁Ｗｂの厚みに相当する
斜状の逃げ部２ａが形成されており、歯形のプレス成形
時にパンチ２がコーナ部Ｗｃに食い込まないようにし
た。かくて、素材Ｗの底面に余肉が盛上ることはなく、
また、コーナ部Ｗｃの肉が周壁Ｗａの歯溝１ａへの押込
みに伴い歯溝１ａ側に引き込まれて、コーナ部Ｗｃも歯
溝１ａに対応した形状に窪む。尚、コーナ部Ｗｃが完全
な歯溝形状に成形されなくても、クラッチインナとして
用いる場合には、クラッチプレートをコーナ部Ｗｃにま
で外挿することはないため特に問題はない。The punch 2 has a peripheral wall Wa and a bottom wall W of the material W.
An inclined relief portion 2a corresponding to the thickness of the bottom wall Wb with respect to the corner portion Wc with respect to b is formed, so that the punch 2 does not bite into the corner portion Wc during the press forming of the tooth profile. Thus, there is no excess on the bottom of the material W,
Further, the flesh of the corner Wc is drawn into the tooth groove 1a side as the peripheral wall Wa is pushed into the tooth groove 1a, and the corner Wc is also recessed into a shape corresponding to the tooth groove 1a. Even when the corner portion Wc is not formed into a complete tooth groove shape, there is no particular problem when the clutch plate is used as the clutch inner because the clutch plate is not extrapolated to the corner portion Wc.
【０００８】[0008]
【発明の効果】以上の説明から明らかなように、本発明
によれば、素材底面に余肉の盛上り部を生ずることなく
素材の周壁に歯形をプレス成形でき、盛上り部の除去工
程が不要となって、製造コストが安くなり、且つ母線方
向断面における周壁の急激な形状変化を生じないため、
応力集中によるクラックも発生しない効果を有する。As is apparent from the above description, according to the present invention, the tooth profile can be press-formed on the peripheral wall of the material without forming a raised portion on the bottom surface of the material, and the step of removing the raised portion can be performed. Since it becomes unnecessary, the manufacturing cost is reduced, and the abrupt shape change of the peripheral wall in the cross section in the generatrix direction does not occur.
This has the effect that cracks due to stress concentration do not occur.
【図１】 本発明の実施に用いる装置の１例の側面図FIG. 1 is a side view of an example of an apparatus used to carry out the present invention.
【図２】 その平面図FIG. 2 is a plan view thereof.
【図３】 その要部のプレス成形時の断面図FIG. 3 is a cross-sectional view of the main part during press molding.
【図４】 従来例の断面図FIG. 4 is a sectional view of a conventional example.
Ｗ 素材 Ｗａ 周壁 Ｗｂ 底壁 Ｗｃ コーナ部 ２ パンチ W Material Wa Peripheral wall Wb Bottom wall Wc Corner 2 Punch
Claims (1)
して配置した放射方向内方に進退自在な複数のパンチに
より内方に押し込んで該周壁に歯形をプレス成形する方
法において、各パンチにカップ状素材の底壁の厚みに相
当する逃げ部を形成し、カップ状素材の周壁に各パンチ
を該周壁の素材底壁とのコーナ部に該各パンチが食い込
まないように押し合てて前記歯形をプレス成形すると共
に、各パンチによる前記周壁の押し込みに伴い前記コー
ナ部の肉を内方に引き込んで該コーナ部を凹入形状に形
成することを特徴とするカップ状歯付製品の成形方法。In a method of pressing a peripheral shape of a cup-shaped material into a plurality of radially inwardly movable punches arranged at intervals in a circumferential direction and pressing a tooth profile on the peripheral wall, Form a relief portion corresponding to the thickness of the bottom wall of the cup-shaped material in the punch, and press each punch on the peripheral wall of the cup-shaped material so that each punch does not bite into the corner portion of the peripheral wall with the material bottom wall. co By press-molding the teeth Te
In addition, as the punches push the peripheral wall,
The meat of the corner is drawn inward and the corner is formed into a concave shape.
A method of forming a cup-shaped toothed product, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3332187A JP2588808B2 (en) | 1991-12-16 | 1991-12-16 | Molding method for cup-shaped toothed products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3332187A JP2588808B2 (en) | 1991-12-16 | 1991-12-16 | Molding method for cup-shaped toothed products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05169173A JPH05169173A (en) | 1993-07-09 |
| JP2588808B2 true JP2588808B2 (en) | 1997-03-12 |
Family
ID=18252146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3332187A Expired - Lifetime JP2588808B2 (en) | 1991-12-16 | 1991-12-16 | Molding method for cup-shaped toothed products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2588808B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5643816A (en) * | 1979-09-17 | 1981-04-22 | Hitachi Ltd | Structure of bonding pad part |
| JPS6130747U (en) * | 1984-07-27 | 1986-02-24 | 日産自動車株式会社 | Flywheel control device |
| JPS6161350A (en) * | 1984-08-31 | 1986-03-29 | Iwatsu Electric Co Ltd | Meshless type cathode-ray tube |
| JPS61105457A (en) * | 1985-10-25 | 1986-05-23 | Hitachi Ltd | Ultrasonic microscope |
-
1991
- 1991-12-16 JP JP3332187A patent/JP2588808B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05169173A (en) | 1993-07-09 |
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