JPH0685965B2 - Constant velocity joint outer ring molding method - Google Patents
Constant velocity joint outer ring molding methodInfo
- Publication number
- JPH0685965B2 JPH0685965B2 JP61107848A JP10784886A JPH0685965B2 JP H0685965 B2 JPH0685965 B2 JP H0685965B2 JP 61107848 A JP61107848 A JP 61107848A JP 10784886 A JP10784886 A JP 10784886A JP H0685965 B2 JPH0685965 B2 JP H0685965B2
- Authority
- JP
- Japan
- Prior art keywords
- punch
- outer ring
- constant velocity
- velocity joint
- joint outer
- 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
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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
- F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forging (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、内面にトラツク溝を有すると共に開口端側に
内面の最大内径より小径のアンダーカツト部を有する等
速ジヨイント外輪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 constant velocity joint outer ring having a track groove on the inner surface and an undercut portion having a diameter smaller than the maximum inner diameter of the inner surface on the opening end side.
（従来の技術） 従来、この種等速ジヨイント外輪の成形は、トラツク溝
用の凹溝を形成したカツプ状素材に成形パンチを挿入
し、該素材を成形ダイにより外周からしごき成形するこ
とで行つている。(Prior art) Conventionally, this type of constant velocity joint outer ring is formed by inserting a forming punch into a cup-shaped material having a groove for a track groove and ironing the material from the outer periphery with a forming die. It is connected.
この場合、該素材の凹溝及び凹溝間の内面部分のパンチ
に対するクリアランスは内面全面に亘りパンチの挿入に
必要な微小量に設定されている。In this case, the clearance between the concave groove of the material and the inner surface portion between the concave grooves with respect to the punch is set to a minute amount necessary for inserting the punch over the entire inner surface.
（発明が解決しようとする問題点） ところで、一般にカツプ状素材をその周壁部全長に亘っ
てしごき成形した場合、剛性の高い底部側に働くスプリ
ングバツク力により剛性の低い開口端側が拡開されて、
製品が口開き傾向になり易い。(Problems to be solved by the invention) Generally, when a cup-shaped material is formed by ironing over the entire length of the peripheral wall portion, the opening end side having low rigidity is expanded due to the spring back force acting on the bottom side having high rigidity. ,
The product tends to open.
特に、開口端側にアンダーカツト部を有するものでは、
底部から最大内径部までのしごき成形は良好に行われて
も、最大内径部を過ぎたアンダーカツト部のしごき成形
に際しては、パンチに対するダイのクリアランスが増加
して、材料のパンチに対する密着度が不足し勝ちとな
り、口開き傾向が増長され、トラツク溝のボール転動面
の縦断面形状が正規のものにならず、形状精度が悪くな
る問題がある。In particular, in the case of having an undercut portion on the opening end side,
Even if the ironing from the bottom to the maximum inner diameter is well performed, the die clearance to the punch increases and the adhesion of the material to the punch is insufficient when ironing the undercut portion that exceeds the maximum inner diameter. There is a problem in that the tendency of opening is increased, the vertical cross-sectional shape of the ball rolling surface of the track groove is not regular, and the shape accuracy is deteriorated.
本発明は、成形後のスプリングバツクによる口開きを抑
制し、形状精度の高い製品を得られるようにした成形方
法を提供することをその目的とする。An object of the present invention is to provide a molding method that suppresses mouth opening due to a spring back after molding so that a product with high shape accuracy can be obtained.
（問題点を解決するための手段） 本発明は、上記目的を達成すべく、内面にトラツク溝を
有すると共に開口端側に内面の最大内径より小径のアン
ダーカツト部を有する等速ジヨイント外輪の成形方法で
あつて、トラツク溝用の凹溝を形成したカツプ状素材に
成形パンチを挿入して、該素材を外周から該素材の周壁
部分全長に亘ってしごき成形するようにしたものにおい
て、該素材の該凹溝間の内面部分の該パンチに対するク
リアランスをトラツク溝の有効長部分を過ぎた該素材の
底部近傍において大きく設定し、しごき成形時の材料の
逃げ空間を形成したことを特徴とする。(Means for Solving the Problems) In order to achieve the above object, the present invention forms a constant velocity join outer ring having a track groove on the inner surface and an undercut portion having a diameter smaller than the maximum inner diameter of the inner surface on the opening end side. In the method, a forming punch is inserted into a cup-shaped material in which a concave groove for a track groove is formed, and the material is ironed from the outer circumference to the entire length of the peripheral wall portion of the material. The clearance of the inner surface portion between the concave grooves with respect to the punch is set to be large in the vicinity of the bottom portion of the material past the effective length portion of the track groove to form an escape space for the material at the time of ironing.
（作用） カツプ状素材の底部近傍に材料の逃げ空間が形成される
ため、底部近傍における材料のパンチへの密着度が低下
し、その分成形後に働くスプリングバツク力も低下し
て、、製品の口開きが抑制され、アンダーカツト部を有
する外輪の内面の形状精度を実用上問題にならない程度
に改良できる。(Function) Since an escape space for the material is formed near the bottom of the cup-shaped material, the degree of adhesion of the material to the punch near the bottom is reduced, and the spring back force that acts after forming is also reduced, and Opening can be suppressed, and the shape accuracy of the inner surface of the outer ring having the undercut portion can be improved to such an extent that there is no practical problem.
ここで、逃げ空間の形成位置はトラツク溝有効長部分を
過ぎた凹溝間の内面部分であるため、該内面部分の形状
精度が悪くなつても、トラツク溝の形状精度への悪影響
は生じず、実用上問題はない。Here, since the formation position of the escape space is the inner surface portion between the concave grooves that have passed the effective length portion of the track groove, even if the shape accuracy of the inner surface portion is deteriorated, there is no adverse effect on the shape accuracy of the track groove. , Practically no problem.
（実施例） 第１図は参照して、（１）は内面にボール転動面を構成
するトラツク溝（1a）を周方向に等間隔に複数条形成し
た等速ジヨイント外輪を示し、該トラツク溝（1a）間の
内面部分即ちケージ摺接面（1b）を軸方向中間で内径が
最大となるようにした球面に形成し、開口端側に最大内
径より小径のアンダーカツト部（1c）を有するものとし
た。(Embodiment) Referring to FIG. 1, (1) shows a constant velocity joint outer ring in which a plurality of track grooves (1a) forming a ball rolling surface are formed on the inner surface at equal intervals in the circumferential direction. The inner surface portion between the grooves (1a), that is, the cage sliding contact surface (1b), is formed into a spherical surface with the maximum inner diameter in the axial middle, and the undercut portion (1c) with a diameter smaller than the maximum inner diameter is formed on the opening end side. To have.
尚、図示のものではトラツク溝（1a）にもアンダーカツ
トを付けたが、かかるアンダーカツトのない第１図に仮
想線で示す如きストレートタイプのトラツク溝（1a）を
有する外輪（１）の成形にも本発明を適用できる。Although an undercut is also attached to the track groove (1a) in the illustrated one, it is possible to form an outer ring (1) having a straight type track groove (1a) as shown by a phantom line in FIG. 1 without such an undercut. The present invention can also be applied.
上記外輪（１）は、第２図に示す如く、トラツク溝（1
a）に対応する凹溝（2a）を形成したカツプ状素材
（２）に成形パンチ（３）を挿入し、該素材（２）をそ
の底部側から開口端側に向つて周壁部全長に亘り成形ダ
イ（４）により外周からしごき成形することで形成され
るもので、この場合該パンチ（３）は、テーパを付けた
マンドレル（3a）の外周に、第３図に示す如くトラツク
溝（1a）及びケージ摺接面（1b）に合致する成形面を有
する複数のコレツト（3b）を装着して成るものとし、し
ごき成形されたアンダーカツト部（1c）付きの外輪
（１）をこれらコレツト（3b）の上動によるパンチ縮径
動作で離型させるようにした。ここで、該素材（２）
は、押出しパンチを用いて通常の後方押出し法により成
形されるもので、この場合凹溝（2a）間の内面部分（2
b）の前記成形パンチ（３）に対するクリアランスがト
ラツク溝（1a）の有効長部分Ａを過ぎた底部近傍で大き
くなるように、押出しパンチの対応部分の寸法を大きく
取つて該素材（２）を成形し、成形パンチ（３）を該素
材（２）に挿入したとき、底部近傍の内面部分（2b）と
該パンチ（３）との間に、第２図及び第４図に示す如
く、材料の逃げ空間（５）を形成した。As shown in Fig. 2, the outer ring (1) has a track groove (1
The forming punch (3) is inserted into the cup-shaped material (2) having the concave groove (2a) corresponding to (a), and the material (2) extends from the bottom side toward the opening end side over the entire length of the peripheral wall portion. The punch (3) is formed by ironing from the outer periphery with a forming die (4). In this case, the punch (3) is formed on the outer periphery of the tapered mandrel (3a) as shown in FIG. ) And a plurality of collects (3b) having molding surfaces that match the cage sliding contact surface (1b), and the outer ring (1) with an undercut part (1c) formed by ironing is attached to these collects (3b). 3b) The punch was reduced in diameter by the upward movement so that it was released. Here, the material (2)
Is formed by an ordinary backward extrusion method using an extrusion punch. In this case, the inner surface portion (2
In order that the clearance of b) to the forming punch (3) becomes large near the bottom of the track groove (1a) past the effective length portion A, the material of the material (2) is prepared by taking a large dimension of the corresponding portion of the extrusion punch. When forming and inserting the forming punch (3) into the material (2), as shown in FIGS. 2 and 4, between the inner surface portion (2b) near the bottom and the punch (3), The escape space (5) was formed.
尚、凹溝（2a）の成形パンチ（３）に対するクリアラン
スはその全長に亘り該パンチ（３）の挿入に必要な微小
量に設定し、トラツク溝（1a）の成形精度を損わないよ
うにした。The clearance of the concave groove (2a) with respect to the forming punch (3) is set to a minute amount necessary for inserting the punch (3) over its entire length so as not to impair the forming accuracy of the track groove (1a). did.
以上の如く、材料の逃げ空間（５）を形成すると、成形
ダイ（４）により素材（２）が外周から絞られて材料が
内側に寄せられても、底部近傍の内面部分（2b）は成形
パンチ（３）に完全に密着しなくなり、空間を残してい
るか接触しても該部分の密着度が低くなつて、成形後に
働くスプリングバツク力が低下し、製品の口開きが抑制
され、又該部分はトラツク溝（1a）の有効長部分から外
れているため、密着度が低くなつても実用上問題はな
い。As described above, when the material escape space (5) is formed, even if the material (2) is squeezed from the outer periphery by the molding die (4) and the material is brought inward, the inner surface portion (2b) near the bottom is molded. The punch (3) does not completely adhere to the punch (3), and even if there is a space or a contact is made, the degree of adhesion of the part becomes low, the spring back force acting after molding is reduced, and opening of the product is suppressed, and Since the part is out of the effective length part of the track groove (1a), there is no practical problem even if the adhesion is low.
アンダーカツト部（1c）は、成形ダイ（４）が成形パン
チ（３）の最大径部を通過する迄に該ダイ（４）により
しごき出された素材（２）の余肉材料が該ダイ（４）に
より内側に寄せられて形成されるもので、この部分での
材料の該パンチ（３）への密着度は低下するが、上記の
如くスプリングバツクによる製品の口開きが抑制される
ため、内面の形状精度は実用上問題とならない程度に向
上される。In the undercut portion (1c), the surplus material of the material (2) squeezed out by the die (4) before the forming die (4) passes through the maximum diameter portion of the forming punch (3) is the die (4). 4) is formed by being pushed inward, and the adhesion of the material to the punch (3) at this portion is reduced, but the opening of the product due to the spring back is suppressed as described above, The shape accuracy of the inner surface is improved to such an extent that it does not pose a practical problem.
（発明の効果） 以上の如く本発明によるときは、アンダーカツト部を有
する等速ジヨイント外輪を形状精度良く成形でき、而も
その手段は素材の底部近傍の内面部分と成形パンチとの
間のクリアランスを大きく取るだけであり、コスト的に
も有利である効果を有する。(Effect of the Invention) As described above, according to the present invention, the constant velocity joint outer ring having the undercut portion can be formed with high shape accuracy, and the means is the clearance between the inner surface portion near the bottom of the material and the forming punch. Is large, and it has an effect that it is advantageous in terms of cost.
第１図は本発明により得られる等速ジヨイント外輪の截
断側面図、第２図は本発明の成形方法を説明する第３図
のII−II線で截断した截断側面図、第３図及び第４図は
夫々第２図のIII−III線及びIV−IV線截断平面図であ
る。 （１）……等速ジヨイント外輪 （1a）……トラツク溝、（1c）……アンダーカツト部 （２）……素材、（2a）……凹溝 （2b）……内部部分、（３）……成形パンチ （５）……逃げ空間FIG. 1 is a cutaway side view of a constant velocity joint outer ring obtained by the present invention, and FIG. 2 is a cutaway side view cut along the line II-II of FIG. 3 for explaining the molding method of the present invention, FIG. 3, and FIG. FIG. 4 is a sectional plan view taken along line III-III and line IV-IV of FIG. 2, respectively. (1) …… Constant speed outer joint ring (1a) …… Track groove, (1c) …… Undercut part (2) …… Material, (2a) …… Concave groove (2b) …… Inner part, (3) …… Molding punch (5) …… Escape space
Claims (1)
に内面の最大内径より小径のアンダーカット部を有する
等速ジョイント外輪の成形方法であって、トラック溝用
の凹溝を形成したカップ状素材に成形パンチを挿入し
て、該素材を外周から該素材の周壁部全長に亘ってしご
き成形するようにしたものにおいて、該素材の該凹溝間
の内周部分の該パンチに対するクリアランスをトラック
溝の有効長部分を過ぎた該素材の底部近傍において大き
く設定し、しごき成形時の材料の逃げ空間を形成したこ
とを特徴とする等速ジョイント外輪の成形方法。1. A method of molding a constant velocity joint outer ring having a track groove on the inner surface and an undercut portion having a diameter smaller than the maximum inner diameter of the inner surface on the opening end side, the cup shape having a groove for the track groove. In the one in which a forming punch is inserted into the material and the material is ironed and formed from the outer circumference to the entire length of the peripheral wall portion of the material, the clearance of the inner peripheral portion between the concave grooves of the material with respect to the punch is tracked. A method for forming a constant velocity joint outer ring, wherein a large clearance is set near the bottom of the material beyond the effective length of the groove to form an escape space for the material during ironing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61107848A JPH0685965B2 (en) | 1986-05-12 | 1986-05-12 | Constant velocity joint outer ring molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61107848A JPH0685965B2 (en) | 1986-05-12 | 1986-05-12 | Constant velocity joint outer ring molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62263841A JPS62263841A (en) | 1987-11-16 |
| JPH0685965B2 true JPH0685965B2 (en) | 1994-11-02 |
Family
ID=14469592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61107848A Expired - Fee Related JPH0685965B2 (en) | 1986-05-12 | 1986-05-12 | Constant velocity joint outer ring molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0685965B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5944138A (en) * | 1982-09-06 | 1984-03-12 | Pioneer Electronic Corp | Demodulator of frequency modulation stereophonic signal |
-
1986
- 1986-05-12 JP JP61107848A patent/JPH0685965B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62263841A (en) | 1987-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |