JPH0638970B2 - Manufacturing method of ball stud with neck groove - Google Patents
Manufacturing method of ball stud with neck grooveInfo
- Publication number
- JPH0638970B2 JPH0638970B2 JP21874286A JP21874286A JPH0638970B2 JP H0638970 B2 JPH0638970 B2 JP H0638970B2 JP 21874286 A JP21874286 A JP 21874286A JP 21874286 A JP21874286 A JP 21874286A JP H0638970 B2 JPH0638970 B2 JP H0638970B2
- Authority
- JP
- Japan
- Prior art keywords
- neck groove
- shaft portion
- ball stud
- ball
- diameter
- 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
- Pivots And Pivotal Connections (AREA)
- Forging (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、自動車懸架装置及び操舵装置等に使用される
ボールジョイントのための首溝付きボールスタッドの製
造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a ball stud with a neck groove for a ball joint used in an automobile suspension system, a steering system, or the like.
従来の技術 ホールジョイントは、ソケット内にボールスタッド球頭
部が軸支され、ソケット開口から突出するボールスタッ
ド軸部が揺動自在にされている。2. Description of the Related Art In a hole joint, a ball stud ball head is pivotally supported in a socket, and a ball stud shaft portion protruding from a socket opening is swingable.
このボールスタッド軸部の揺動角度を大きく確保するた
め、第７図に示される如く通常、ボールスタッド１の軸
部３と球頭部２との間には、径の細い首溝４が形成され
る。In order to secure a large swinging angle of the ball stud shaft portion, a neck groove 4 having a small diameter is usually formed between the shaft portion 3 of the ball stud 1 and the ball head 2 as shown in FIG. To be done.
首溝をボールスタッド鍛造成形後に切削することなく、
鍛造工程で軸部及び球頭部径より細く形成する方法は、
特公昭４９−１３８１７号により知られている。Without cutting the neck groove after ball stud forging,
In the forging process, the method of forming the shaft and the ball head smaller than the diameter is
It is known from Japanese Examined Patent Publication No. 49-13817.
その製造方法の要旨は、予め軸部及び首溝を完成形状に
形成し、その後首溝径以下に形成されていた棒状粗材の
一端をカップ状に成形し、そのカップ状部分を中空の球
頭部に圧造成形するものである。The gist of the manufacturing method is that the shaft portion and the neck groove are formed in advance to a completed shape, and then one end of a rod-shaped rough material formed to have a diameter smaller than the neck groove is formed into a cup shape, and the cup-shaped portion is a hollow ball. It is forged on the head.
発明が解決しようとする問題点 上述の従来の製造方法による場合は、細い首溝部径と同
等径から大径の球頭部を成形するため、球頭部の成形に
相当な無理がある。Problems to be Solved by the Invention In the case of the above-described conventional manufacturing method, since a ball head having a diameter equal to that of the thin neck groove portion is formed to a large diameter, there is considerable difficulty in forming the ball head.
そのため、軸部に対して首部径を小さく形成すること
は、極めて困難であった。Therefore, it is extremely difficult to form the neck portion with a smaller diameter than the shaft portion.
この点、球頭部と軸部との間に軸部よりもできる限り小
径の首部を切削によらず形成する製造方法が、ボールス
タッド生産合理化等のため強く求められていた。In this respect, there has been a strong demand for a manufacturing method in which a neck portion having a diameter as small as possible than the shaft portion is formed between the ball head portion and the shaft portion without cutting, in order to rationalize production of ball studs.
問題点を解決するための手段 予め球頭部の一方に所定径より細い軸部と、その球頭部
と軸部との間に軸部より高く加工硬化された首溝部とを
有する粗材とを形成し、その後前記粗材を軸方向に据込
んで軸部の中間部分を膨出させる。Means for Solving Problems A rough material having in advance a shaft portion thinner than a predetermined diameter on one of the ball heads, and a neck groove portion work-hardened higher than the shaft portion between the ball head and the shaft portion. After that, the rough material is installed in the axial direction to bulge the intermediate portion of the shaft portion.
作用 予備成形されたボールスタッドの半完成粗材を軸線方向
に据込むことにより、事前に高く加工硬化された首溝部
の膨出が抑制され軸部の中間部分が膨出し、その膨出し
た軸部と球頭部との間には両者より径の細い首溝が形成
される。Action By preliminarily installing the semi-finished rough material of the ball stud in the axial direction, the bulging of the neck groove part which has been highly work hardened in advance is suppressed and the middle part of the shaft part bulges out. A neck groove having a smaller diameter than the both is formed between the portion and the ball head.
実施例 以下本発明を実施例の図面によって説明する。まず、第
１図に示されるように、製造すべきボールスタッド１
（第７図）の首溝４の最小径と略同一の外径を有する円
柱形材料を切断することにより、ボールスタッドの全体
積とほぼ同一の体積を有する素材１ａを形成する。Embodiments The present invention will be described below with reference to the drawings of embodiments. First, as shown in FIG. 1, a ball stud 1 to be manufactured.
By cutting a cylindrical material having an outer diameter substantially the same as the minimum diameter of the neck groove 4 (FIG. 7), a material 1a having a volume substantially the same as the entire volume of the ball stud is formed.
つぎに、前方押し出しにより小径部６ｂを形成し（第２
図）、さらに頭部２ｃ及び首溝部４ｃを膨出させ（第３
図）、ついで前記膨出された首溝部４ｃを軸部３ｄと同
等径に絞り込んで充分に加工硬化させると共に頭部２ｄ
を若干据込んで予備成形する。Next, the small diameter portion 6b is formed by forward extrusion (second
Figure), and further bulge the head 2c and neck groove 4c (3rd
Next, the bulged neck groove portion 4c is narrowed down to the same diameter as the shaft portion 3d to sufficiently work and harden the head portion 2d.
To slightly pre-form.
この膨出された首溝部４ｃの絞り込みは、図示されてい
ないダイにパンチで粗材１ｃを押し込んで、第４図に二
点鎖線で示される首溝相当部分を実線で示す小径形状に
成形することにより、殆んど変形を受けていない軸部３
ｄに比し首溝部４ｄの加工硬化を高める働きをする。In the narrowing down of the bulged neck groove portion 4c, the rough material 1c is pushed into a die (not shown) with a punch to form a portion corresponding to the neck groove indicated by a two-dot chain line in FIG. 4 into a small diameter shape indicated by a solid line. As a result, the shaft portion 3 that is hardly deformed
Compared with d, it functions to enhance work hardening of the neck groove portion 4d.
続いて、予備成形された頭部２ｄを球状に据込んで球頭
部２ｅを形成する（第５図）。Subsequently, the preformed head 2d is installed in a spherical shape to form a ball head 2e (Fig. 5).
つぎに、第６図に示す如く、軸部を軸線方向に据込んで
軸部３ｆの中間部分を膨出させる。即ち、小径部６ｆの
外周に略密接する小径穴と軸部３ｅとは適当な間隔をも
って対向する円筒孔と、開口周囲に球頭部２ｅの半部に
適合する部分球状座を有するダイ２１に、ボールスタッ
ド半完成粗材１ｅを挿入し、球頭部２ｆの半球部に適合
する半球状座を有するパンチ２０により、軸線方向に据
込んで、軸部３ｅを軸線方向に短縮し、軸部を外周方向
に膨出させる。Next, as shown in FIG. 6, the shaft portion is installed in the axial direction to bulge the intermediate portion of the shaft portion 3f. That is, in the die 21 having a cylindrical hole in which the small diameter hole and the shaft portion 3e, which are substantially in close contact with the outer circumference of the small diameter portion 6f, face each other with an appropriate interval, and a partial spherical seat that fits a half portion of the spherical head 2e around the opening. , The ball stud semi-finished rough material 1e is inserted, and the punch 20 having a hemispherical seat that fits the hemispherical portion of the ball head 2f is axially installed to shorten the shaft 3e in the axial direction. Bulge in the outer peripheral direction.
そのため、ダイ２１の前記円筒孔は、第５図に示す粗材
１ｅの軸部３ｅの軸線方向長さより短かく形成されてい
る。Therefore, the cylindrical hole of the die 21 is formed shorter than the axial length of the shaft portion 3e of the rough material 1e shown in FIG.
この軸部の据込みによりボールスタッド１ｆは、球頭部
２ｆと軸部３ｆより小径の首溝４ｆが形成される。この
際、首溝４ｆは、その部分が据込みに先立って高く加工
硬化されているため、据込みによる膨出が抑制され、所
望の小径を切削によらず得ることができる。Due to the upsetting of the shaft portion, the ball stud 1f is formed with a neck portion 4f having a diameter smaller than that of the ball head 2f and the shaft portion 3f. At this time, since the neck groove 4f is highly work hardened prior to upsetting, bulging due to upsetting is suppressed, and a desired small diameter can be obtained without cutting.
このように成形されたボールスタッド１ｆは、ノックア
ウト２２に押し出され、膨出された軸部３ｆには必要に
より第７図に示すような截頭円錐形のテーパ部５を形成
する。The ball stud 1f thus formed is pushed out by the knockout 22, and the bulged shaft portion 3f is formed with a truncated cone-shaped tapered portion 5 as shown in FIG. 7 if necessary.
効果 以上のように本発明によれば、予備成形されたボールス
タッドの半完成粗材を軸線方向に据込むことにより、事
前に高く加工硬化された首溝部の膨出が抑制され軸部の
中間部分が膨出し、その膨出した軸部と球頭部との間に
は両者より径の細い首溝が形成されるので、据込みによ
り小径の首溝と大径の軸部との外径差を大きく形成する
ことができ、また据込みによる首溝部径の増加を少なく
できる。Effects As described above, according to the present invention, the semi-finished rough material of the preformed ball stud is installed in the axial direction, so that the bulging of the neck groove portion which is highly work hardened in advance is suppressed and the middle portion of the shaft portion is suppressed. Since the part bulges out and a neck groove with a smaller diameter is formed between the bulging shaft part and the ball head, the outer diameter between the small diameter groove and the large diameter shaft part is increased by upsetting. A large difference can be formed, and an increase in neck groove diameter due to upsetting can be reduced.
図面は本発明の実施例を表わすもので、第１図乃至第６
図はボールスタッド成形工程の段階的説明図。第７図は
ボールスタッドの平面図である。 （記号の説明） １（１ｆ）……ボールスタッド。２（2e,2f）……球頭
部。３（3e,3f）……軸部。４（4e,4f）……首溝。The drawings show an embodiment of the present invention and are shown in FIGS.
The figure is a step-by-step explanatory diagram of the ball stud forming process. FIG. 7 is a plan view of the ball stud. (Explanation of symbols) 1 (1f) …… Ball stud. 2 (2e, 2f) ... ball head. 3 (3e, 3f) …… Shaft. 4 (4e, 4f) ... neck groove.
Claims (1)
部３ｅと、その球頭部２ｅと軸部３ｅとの間に軸部３ｅ
より高く加工硬化された首溝部４ｅとを有する粗材１ｅ
を形成し、その後前記粗材１ｅを軸線方向に据込んで軸
部３ｅの中間部分を膨出させることを特徴とする首溝付
きボールスタッドの製造方法。1. A shaft portion 3e having a diameter smaller than a predetermined diameter is previously provided on one of the ball heads 2e, and a shaft portion 3e is provided between the ball head 2e and the shaft portion 3e.
Rough material 1e having a higher work-hardened neck groove portion 4e
And then swelling the rough material 1e in the axial direction to swell the intermediate portion of the shaft portion 3e.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21874286A JPH0638970B2 (en) | 1986-09-17 | 1986-09-17 | Manufacturing method of ball stud with neck groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21874286A JPH0638970B2 (en) | 1986-09-17 | 1986-09-17 | Manufacturing method of ball stud with neck groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6376733A JPS6376733A (en) | 1988-04-07 |
| JPH0638970B2 true JPH0638970B2 (en) | 1994-05-25 |
Family
ID=16724710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21874286A Expired - Lifetime JPH0638970B2 (en) | 1986-09-17 | 1986-09-17 | Manufacturing method of ball stud with neck groove |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638970B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006088197A (en) * | 2004-09-24 | 2006-04-06 | Aisan Ind Co Ltd | Manufacturing method for axial product with expanded head, manufacturing method for engine valve, and forging die used for manufacturing axial product with expanded head |
| CN100391635C (en) * | 2005-10-11 | 2008-06-04 | 宁波安拓实业有限公司 | Method for producing trailer screw blank piece |
| DE102010018644A1 (en) * | 2010-04-28 | 2011-11-03 | Trw Automotive Gmbh | bolt |
| DE102010018643A1 (en) * | 2010-04-28 | 2011-11-03 | Trw Automotive Gmbh | ball pin |
| RU2483829C1 (en) * | 2012-01-10 | 2013-06-10 | Открытое акционерное общество "Белебеевский завод "Автонормаль" | Method of producing ball pins |
| CN114074168B (en) * | 2020-08-19 | 2024-06-18 | 宾科汽车紧固件（昆山）有限公司 | Bolt forming method and cold heading device |
| CN113857419A (en) * | 2021-09-18 | 2021-12-31 | 无锡透平叶片有限公司 | Blank design method for reducing flash cracking of high-temperature alloy turbine blade forging |
-
1986
- 1986-09-17 JP JP21874286A patent/JPH0638970B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6376733A (en) | 1988-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6044543A (en) | Method of manufacturing a joint housing | |
| JPH0638970B2 (en) | Manufacturing method of ball stud with neck groove | |
| JPS63299839A (en) | Method and device for manufacturing fluted nut | |
| JPH0459059B2 (en) | ||
| JPH0223257B2 (en) | ||
| JPH05305383A (en) | Sleeve with split groove and manufacture thereof | |
| JPS6372447A (en) | Manufacture of ball stud with neck groove | |
| JP2001018032A (en) | Manufacture of flanged shaft, and manufacturing device used therefor | |
| JPH08187542A (en) | Manufacture of shaft-like parts with spherical head | |
| JPH0655236A (en) | Production of housing for one piece formed ball joint | |
| JPS62183931A (en) | Manufacture of ball stud | |
| JP3617693B2 (en) | Method of manufacturing fuel injection device component having undercut | |
| JP4463032B2 (en) | Pressed stud bolt | |
| JP2825800B2 (en) | Method for forging and forging a cylindrical part having a substantially spherical bulge at the center | |
| JP2731998B2 (en) | Assembly method of ball joint | |
| JPH094629A (en) | Manufacture of cap nut | |
| JPS62183930A (en) | Manufacture of ball stud | |
| JPH0679394A (en) | Manufacture of sleeve with expanding slot | |
| JPH0191933A (en) | Production of ball stud with neck groove | |
| JP2617027B2 (en) | Terminal manufacturing method | |
| JPS62183929A (en) | Manufacture of ball stud | |
| JP3226327B2 (en) | Method of manufacturing spark plug electrode | |
| JPH02251332A (en) | Die for forging ball joint housing | |
| JPH04354623A (en) | Working for ball stud spherical head part | |
| JPS632697B2 (en) |