JPH06102243B2 - Constant velocity universal joint outer ring manufacturing method - Google Patents
Constant velocity universal joint outer ring manufacturing methodInfo
- Publication number
- JPH06102243B2 JPH06102243B2 JP60176784A JP17678485A JPH06102243B2 JP H06102243 B2 JPH06102243 B2 JP H06102243B2 JP 60176784 A JP60176784 A JP 60176784A JP 17678485 A JP17678485 A JP 17678485A JP H06102243 B2 JPH06102243 B2 JP H06102243B2
- Authority
- JP
- Japan
- Prior art keywords
- cup
- ironing
- outer ring
- universal joint
- constant velocity
- 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 10
- 238000010409 ironing Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 12
- 238000005242 forging Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
- B21K1/762—Coupling members for conveying mechanical motion, e.g. universal joints
- B21K1/765—Outer elements of coupling members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
- B21K1/762—Coupling members for conveying mechanical motion, e.g. universal joints
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、内周に転動体用の軸方向溝を有する等速自
在継手外輪の製造方法に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a constant velocity universal joint outer ring having an axial groove for rolling elements on its inner circumference.
従来の技術 例えばダブルオフセット型等速自在継手の外輪（１）
は、第８図及び第９図に示す如く、ステム（２）とこの
ステム（２）の一端に設けられたカップ（３）とで構成
され、カップ（３）の内周面（3a）に軸方向に延びる数
条のボール転動溝（3b）が形成されている。Conventional technology For example, outer ring of double offset type constant velocity universal joint (1)
Is composed of a stem (2) and a cup (3) provided at one end of the stem (2) as shown in FIGS. 8 and 9, and is formed on the inner peripheral surface (3a) of the cup (3). Several ball rolling grooves (3b) extending in the axial direction are formed.
通常、上記外輪（１）は機械構造用炭素鋼や肌焼鋼を材
料として鍛造加工にて第10図に示す如き内周に複数の軸
方向溝を有する底付円筒状素材（10）を製作し、この素
材（10）に第11図に示す如く、パンチ（４）とダイス
（５）で以って断面しごき率が25〜45％のしごき加工を
施して製造される。Usually, the outer ring (1) is made of carbon steel for machine structural use or case hardening steel by forging to manufacture a cylindrical material (10) with a bottom having a plurality of axial grooves on the inner circumference as shown in FIG. Then, as shown in FIG. 11, this material (10) is manufactured by punching with a punch (4) and a die (5) with a cross-section ironing rate of 25 to 45%.
発明が解決しようとする問題点 ところで、素材（10）をパンチ（４）にセットしてダイ
ス（５）によりしごき加工する場合、しごき加工開始後
のしごき途中過程で、カップ円筒部（11）のカップ底近
傍（11a）においてダイス（５）によりしぼり寄せられ
る材料の流れが、第12図に示す如く矢印（ａ）（ｂ）の
２方向に分かれて互いに引っ張り合う為に、カップ円筒
部（11）のカップ底近傍（11a）に第13図に示す如き微
細な割れ（ｃ）が発生しやすく、また、しごき加工後は
カップ円筒部（11）とカップ底部（12）の肉厚の差によ
るスプリングバック量が異なる為、カップ円筒部（11）
のカップ底近傍（11a）がカップ底部（12）のスプリン
グバックにひきずられて第13図に示す如く寸法がプラス
となる湾曲形状となり、高品質、高精度の製品が得られ
なかった。Problems to be Solved by the Invention By the way, when the material (10) is set in the punch (4) and is ironed by the die (5), the cup cylindrical portion (11) is The flow of the material squeezed by the die (5) near the cup bottom (11a) is divided into two directions of arrows (a) and (b) as shown in FIG. ) It is easy for fine cracks (c) as shown in Fig. 13 to occur near the cup bottom (11a), and due to the difference in wall thickness between the cup cylindrical part (11) and the cup bottom part (12) after ironing. Since the amount of spring back is different, the cup cylindrical part (11)
The vicinity of the cup bottom (11a) was dragged by the spring back of the cup bottom (12) to form a curved shape with a positive dimension as shown in FIG. 13, and high quality and high precision products could not be obtained.
この発明は上記問題点に鑑み、カップ円筒部のカップ底
近傍に微細割れのない、しかも、カップ円筒部の寸法に
バラツキのない高品質、高精度の製品を得ることを目的
とする等速自在継手外輪の製造方法を提供せんとするも
のである。In view of the above problems, the present invention aims to obtain a high-quality, high-precision product that does not have fine cracks in the vicinity of the cup bottom of the cup cylindrical portion and has no variation in the dimensions of the cup cylindrical portion. It is intended to provide a method for manufacturing a joint outer ring.
問題点を解決するための手段 上記の目的を達成する為のこの発明の構成を、円周に複
数の軸方向溝を有する底付円筒状素材を鍛造加工により
製作し、これをしごき加工により仕上げる等速自在継手
外輪の製造方法に於いて、上記円筒状素材のカップ底部
並びにカップ円筒部のカップ底近傍の外周に、当該部分
のしごき率を20％以下に抑える縮径部を設けたものであ
る。Means for Solving the Problems With the constitution of the present invention for achieving the above object, a cylindrical material with a bottom having a plurality of axial grooves in the circumference is manufactured by forging, and this is finished by ironing. In the method for manufacturing a constant velocity universal joint outer ring, a reduced diameter portion for suppressing the ironing rate of the portion to 20% or less is provided on the cup bottom portion of the cylindrical material and the outer periphery of the cup cylindrical portion near the cup bottom. is there.
作用 上記素材をしごき加工すると、カップ底部並びにカップ
円筒部のカップ底近傍のしごき量が縮径部によって減少
される。これにより、しごき加工開始後のしごき途中過
程で、カップ円筒部のカップ底近傍においてダイスによ
りしぼり寄せられる２方向の材料の流れのうちカップ底
部に向う方向の流れが小さくなると共に、しごき加工後
のカップ底部とカップ円筒部のスプリングバック量が略
同一となる。Action When the above material is ironed, the amount of ironing in the vicinity of the cup bottom of the cup bottom portion and the cup cylindrical portion is reduced by the reduced diameter portion. As a result, in the middle of the ironing process after the start of the ironing process, the flow in the direction toward the cup bottom of the two-way material flow that is squeezed by the die near the cup bottom of the cup cylindrical portion becomes smaller, and after the ironing process, The amount of springback of the cup bottom portion and the cup cylindrical portion are substantially the same.
実施例 第１図乃至第５図はこの発明による等速自在継手外輪の
具体的な製造方法を説明する為の説明図である。Embodiment FIGS. 1 to 5 are explanatory views for explaining a specific method for manufacturing an outer ring for a constant velocity universal joint according to the present invention.
図面に於いて、（20）は軸付円筒状素材、（21）は素材
（20）のカップ円筒部、（22）は素材（20）のカップ底
部である。In the drawings, (20) is a cylindrical material with a shaft, (21) is a cylindrical portion of the cup of the material (20), and (22) is a bottom portion of the cup of the material (20).
素材（20）は鍛造加工にて製作され、上記鍛造加工にお
いてカップ円筒部（21）の内周に複数の軸方向溝を形成
すると共に、カップ底部（22）並びにカップ円筒部（2
1）のカップ底近傍（21a）の外周に円錐形状の縮径部
（23）を形成している。The material (20) is manufactured by forging, and in the forging, a plurality of axial grooves are formed on the inner circumference of the cup cylindrical part (21), and the cup bottom part (22) and the cup cylindrical part (2) are formed.
A conical diameter-reduced portion (23) is formed on the outer periphery of the cup bottom (21a) of 1).
上記した素材（20）を第２図に示す如くパンチ（30）と
ダイス（40）で以ってしごき加工させると、カップ底部
（22）並びにカップ円筒部（21）のカップ底近傍（21
a）のしごき量が縮径部（23）により減少する為、しご
き加工開始後のしごき途中過程で、カップ円筒部（21）
のカップ底近傍（21a）においてダイス（40）によりし
ぼり寄せられる第12図に示す如き矢印（ａ）（ｂ）の２
方向の材料の流れのうち矢印（ａ）の方向の流れが小さ
くなり、これにより、カップ円筒部（21）のカップ底近
傍（21a）に微細な割れが発生しなくなる。また、縮径
部（23）によりカップ円筒部（21）とカップ底部（22）
のスプリングバック量が略同一になる為、しごき後のカ
ップ円筒部（21）のカップ底近傍（21a）の湾曲が起こ
らない。When the above-mentioned material (20) is ironed by a punch (30) and a die (40) as shown in FIG. 2, the cup bottom (22) and the cup cylindrical portion (21) near the cup bottom (21)
Since the amount of ironing in a) is reduced by the reduced diameter part (23), the cup cylindrical part (21) can be removed during the ironing process after the start of ironing.
12 (2) of arrows (a) and (b) as shown in FIG. 12 squeezed by the die (40) near the cup bottom (21a) of
The flow in the direction of the arrow (a) is reduced in the flow of the material in the directional direction, whereby fine cracks do not occur near the cup bottom (21a) of the cup cylindrical portion (21). Also, the reduced diameter portion (23) allows the cup cylindrical portion (21) and the cup bottom portion (22).
Since the amount of spring back is almost the same, the curvature of the cup cylindrical portion (21) near the cup bottom (21a) does not occur after ironing.
第３図は素材（20）の縮径部（23）が各しごき率でしご
き加工された時の実験データを示すグラフで、しごき率
が21％以上になると、カップ円筒部（21）のカップ底近
傍（21a）に微細割れが生じることが判明した。而し
て、素材（20）の縮径部（23）のしごき率を20％以下に
抑えるのが望ましい。FIG. 3 is a graph showing experimental data when the reduced diameter portion (23) of the material (20) is ironed at each ironing rate. When the ironing rate is 21% or more, the cup of the cup cylindrical portion (21) is cupped. It was found that fine cracks occur near the bottom (21a). Therefore, it is desirable to suppress the ironing rate of the reduced diameter portion (23) of the material (20) to 20% or less.
T:カップ底位置のしごき加工前肉厚 （第４図参照） t:カップ底位置のしごき加工後肉厚 （第５図参照） 尚、縮径部（23）は実施例で円錐形状に形成されている
が、この発明ではこれに限定されるものではなく、例え
ば第６図に示す如き円筒と円錐の組合せ形状や第７図に
示す如き曲線による外殻形状でも良く、要はしごき率を
20％以下に抑えることが重要である。 T: Thickness before ironing at the cup bottom position (see Fig. 4) t: Thickness after ironing at the cup bottom position (see Fig. 5) The reduced diameter portion (23) is formed in a conical shape in the embodiment. However, the present invention is not limited to this. For example, a combination shape of a cylinder and a cone as shown in FIG. 6 or an outer shell shape by a curve as shown in FIG. 7 may be used.
It is important to keep it below 20%.
発明の効果 この発明は以上説明したように、内周に複数の軸方向溝
有する底付円筒状素材を用いてしごき加工により仕上げ
るときに、前記円筒状素材のカップ底部並びにカップ円
筒部のカップ底近傍の外周に、当該部分のしごき率を20
％以下に抑える縮径部を予め設けたので、カップ円筒部
のカップ底近傍において微細割れがなくなると共に、湾
曲も起らなくなって寸法のバラツキがなくなり、高品
質、高精度の製品を得ることができる。EFFECTS OF THE INVENTION As described above, according to the present invention, when finishing is performed by ironing using a bottomed cylindrical material having a plurality of axial grooves on the inner circumference, the cup bottom of the cylindrical material and the cup bottom of the cup cylindrical portion are formed. The ironing rate of the part is 20
Since a reduced diameter part that suppresses to less than or equal to 8% is provided in advance, fine cracks disappear in the vicinity of the cup bottom of the cup cylindrical part, curvature does not occur and dimensional variation is eliminated, and high quality and high precision products can be obtained. it can.
第１図はこの発明の等速自在継手外輪の製造方法に用い
られる軸付円筒状素材の縦断面図、第２図は第１図の素
材でのしごき加工の要領を説明する図面、第３図は上記
素材の縮径部を各しごき率でしごき加工した時の実験デ
ータを示すグラフ、第４図及び第５図は上記素材の縮径
部付近のしごき加工前としごき加工後を示す断面図、第
６図及び第７図は上記素材の縮径部の変形例を示す断面
図、第８図及び第９図はこの発明の対称とする等速自在
継手外輪の概略形状を示す上半分の平面図及び要部断面
正面図、第10図は従来の円筒状素材を示す断面図、第11
図は第10図の素材でのしごき加工要領を説明する図面、
第12図はしごき途中過程での材料の流れを説明する図
面、第13図は従来のしごき加工後のカップ円筒部のカッ
プ底近傍を示す断面図である。 （20）……軸付円筒状素材、（21）……カップ円筒部、
（21a）……カップ底近傍、（22）……カップ底部、（2
3）……縮径部。FIG. 1 is a vertical cross-sectional view of a cylindrical material with a shaft used in the method for producing a constant velocity universal joint outer ring of the present invention, FIG. 2 is a drawing for explaining the procedure of ironing with the material of FIG. 1, and 3 The figure is a graph showing the experimental data when ironing the reduced diameter portion of the above material at each ironing rate, and Figs. 4 and 5 are cross sections showing before and after ironing near the reduced diameter portion of the above material. FIGS. 6, 6 and 7 are sectional views showing a modified example of the reduced diameter portion of the above material, and FIGS. 8 and 9 are upper halves showing a schematic shape of a constant velocity universal joint outer ring which is symmetrical to the present invention. FIG. 10 is a plan view and a sectional front view of an essential part, FIG. 10 is a sectional view showing a conventional cylindrical material, and FIG.
The figure is a drawing explaining the ironing process with the material in Figure 10,
FIG. 12 is a drawing for explaining the flow of material in the course of ironing, and FIG. 13 is a sectional view showing the vicinity of the cup bottom of a conventional cup cylindrical portion after ironing. (20) …… Cylindrical material with shaft, (21) …… Cylinder cylindrical part,
(21a) …… near the cup bottom, (22) …… cup bottom, (2
3) ... reduced diameter part.
Claims (1)
状素材を鍛造加工により製作し、これをしごき加工によ
り仕上げる等速自在継手外輪の製造方法に於いて、上記
円筒状素材のカップ底部並びにカップ円筒部のカップ底
近傍の外周に、当該部分のしごき率を20％以下に抑える
縮径部を設けたことを特徴とする等速自在継手外輪の製
造方法。1. A method for manufacturing an outer ring for a constant velocity universal joint, which comprises manufacturing a bottomed cylindrical material having a plurality of axial grooves on the inner periphery by forging and finishing it by ironing. A method for manufacturing an outer ring for a constant velocity universal joint, comprising: a cup bottom portion and an outer periphery of the cup cylindrical portion near the cup bottom, each having a reduced diameter portion for suppressing an ironing rate of the portion to 20% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60176784A JPH06102243B2 (en) | 1985-08-09 | 1985-08-09 | Constant velocity universal joint outer ring manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60176784A JPH06102243B2 (en) | 1985-08-09 | 1985-08-09 | Constant velocity universal joint outer ring manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6234644A JPS6234644A (en) | 1987-02-14 |
| JPH06102243B2 true JPH06102243B2 (en) | 1994-12-14 |
Family
ID=16019785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60176784A Expired - Lifetime JPH06102243B2 (en) | 1985-08-09 | 1985-08-09 | Constant velocity universal joint outer ring manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06102243B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2523372B2 (en) * | 1989-04-28 | 1996-08-07 | 本田技研工業株式会社 | Constant velocity joint outer ring manufacturing method |
| JP2014226691A (en) * | 2013-05-22 | 2014-12-08 | Ntn株式会社 | Manufacturing method of outside joint member for constant velocity universal joint, and intermediate forged product processed to outside joint member |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4819806B2 (en) * | 1971-04-19 | 1973-06-16 | ||
| JPS5944138B2 (en) * | 1975-08-20 | 1984-10-26 | エヌテ−エヌ東洋ベアリング （株） | Method and device for ironing the outer ring of a universal joint |
| JPS5844941A (en) * | 1981-09-11 | 1983-03-16 | Nissan Motor Co Ltd | Manufacture of structural part of uniform speed joint |
| JPS59220240A (en) * | 1983-05-27 | 1984-12-11 | Toyota Motor Corp | Forming by plastic working |
| JPS6083734A (en) * | 1983-10-13 | 1985-05-13 | Toyota Motor Corp | Forming method by plastic working |
-
1985
- 1985-08-09 JP JP60176784A patent/JPH06102243B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6234644A (en) | 1987-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| EXPY | Cancellation because of completion of term |