JPH08267165A - Shaftlike rough shape material for form rolling of under head recess of thread portion - Google Patents
Shaftlike rough shape material for form rolling of under head recess of thread portionInfo
- Publication number
- JPH08267165A JPH08267165A JP7573395A JP7573395A JPH08267165A JP H08267165 A JPH08267165 A JP H08267165A JP 7573395 A JP7573395 A JP 7573395A JP 7573395 A JP7573395 A JP 7573395A JP H08267165 A JPH08267165 A JP H08267165A
- Authority
- JP
- Japan
- Prior art keywords
- under
- rolling
- head
- shaft
- face
- 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.)
- Pending
Links
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は首下逃がし部転造用軸状
粗形材に関する。この首下逃がし部転造用軸状粗形材を
転造することにより、例えばコンロッドボルト等の製品
が得られる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft-shaped rough material for rolling under head relief portion. By rolling the shaft-shaped rough material for rolling under the neck relief portion, for example, a product such as a connecting rod bolt can be obtained.
【０００２】[0002]
【従来の技術】以下、製品としてのコンロッドボルトを
粗形材より得る場合を例にとって説明する。すなわち、
コネクティングロッドは、ロッドと、キャップと、これ
らロッド及びキャップを締結するコンロッドボルトとよ
り構成され得る。このコンロッドボルトを製造する場
合、図７に示すように、フランジ部としての頭部９０
と、この頭部９０の一端面９０ａから略直角に延出する
軸部９１とからなる鍛造後の粗形材Ｗ0 が用いられ得
る。この粗形材Ｗ0 を用いる場合、軸部９１の他端部に
図示しないねじ用転造ダイスを用いてねじ転造を行え
ば、その部分に図示しないねじ部が形成され、コンロッ
ドボルトとされる。2. Description of the Related Art A case where a connecting rod bolt as a product is obtained from a rough material will be described below as an example. That is,
The connecting rod may include a rod, a cap, and a connecting rod bolt that fastens the rod and the cap. When manufacturing this connecting rod bolt, as shown in FIG.
And the rough forged material W 0 after forging composed of the shaft portion 91 extending substantially at right angles from the one end surface 90a of the head portion 90 can be used. When this rough material W 0 is used, if thread rolling is performed on the other end of the shaft portion 91 using a thread rolling die (not shown), a thread portion (not shown) is formed at that portion, and a connecting rod bolt is formed. It
【０００３】こうして得られたコンロッドボルトは頭部
９０の一端面９０ａがロッドと当接する座面（以下、座
面９０ａとする。）とされるが、一般的なコンロッドボ
ルトでは、鍛造時の首下丸み部９１ａがそのまま残さ
れ、座面９０ａの平坦面が首下丸み部９１ａにより減少
する。この場合、ロッドとキャップとを小さな軸力でし
か締結できないこととなる。In the connecting rod bolt thus obtained, one end surface 90a of the head portion 90 serves as a seat surface (hereinafter referred to as a seat surface 90a) in contact with the rod. However, in a general connecting rod bolt, a neck at the time of forging is used. The lower rounded portion 91a is left as it is, and the flat surface of the seat surface 90a is reduced by the lower neck rounded portion 91a. In this case, the rod and the cap can be fastened only with a small axial force.
【０００４】このため、首下丸み部９１ａを除去するこ
とが好ましい。この場合、切削によれば加工費の高騰を
生じるとともに加工後の強度低下が予想されるため、上
記ねじ転造と同時に首下盗み転造を行なうことが好まし
いと考えられる。この場合、図８に示すように、まず互
いに対向する凸部８０ａ、８１ａをもつ首下盗み用転造
ダイス８０、８１を用い、これらの首下盗み用転造ダイ
ス８０、８１を図示しないねじ用転造ダイスとともに可
動盤８２、８３間に装備する。そして、粗形材Ｗ0 を軸
方向で保持し、可動盤８２、８３を互いに近づく方向に
押圧しつつ紙面と直角に互いに離れる方向に移動させ
る。Therefore, it is preferable to remove the rounded neck portion 91a. In this case, cutting causes an increase in processing cost and a decrease in strength after processing is expected. Therefore, it is considered preferable to perform under-the-head stealing rolling simultaneously with the thread rolling. In this case, as shown in FIG. 8, first, under-steal roll dice 80, 81 having convex portions 80a, 81a facing each other are used, and these un-steal roll dice 80, 81 for screws are not shown. It is equipped between the movable plates 82 and 83 together with the rolling dies. Then, the rough material W 0 is held in the axial direction, and the movable plates 82 and 83 are pressed in the directions approaching each other and moved in the directions separating from each other at right angles to the paper surface.
【０００５】こうして得られるコンロッドボルトでは、
図９に示すように、軸部９１における頭部９０と隣接す
る一端部に環状の首下逃がし部９１ｂが凹設されること
により首下丸み部９１ａが除かれ、これにより座面９０
ａの平坦面が拡大されるため、ロッドとキャップとを大
きな軸力で締結できる。In the connecting rod bolt thus obtained,
As shown in FIG. 9, an annular under-neck relief portion 91b is recessed at one end portion of the shaft portion 91 adjacent to the head portion 90, whereby the under-neck rounded portion 91a is removed, whereby the seat surface 90 is formed.
Since the flat surface of a is enlarged, the rod and the cap can be fastened with a large axial force.
【０００６】[0006]
【発明が解決しようとする課題】しかし、こうして得ら
れたコンロッドボルトでは、図９に示すように、首下逃
がし部９１ｂの転造時に余肉が生じてしまう。この余肉
は、軸部９１の首下逃がし部９１ｂの他端側に盛り上が
る他、頭部９０の座面９０ａを径方向に移動して頭部９
０の側面９０ｂにも盛り上がってしまう。軸部９１の首
下逃がし部９１ｂの他端側に盛り上がった余肉９２は、
図１０に示すように、軸部９１が単純な円筒面であるこ
とからバニシ仕上げにより容易に押しつぶしてロッドと
の干渉が生じないようにすることができるが、頭部９０
の側面９０ｂに盛り上がった余肉９３は、頭部９０が一
般に異形であるため、面倒な加工によらなければそのま
ま残留させてしまうこととなる。こうして得られたコン
ロッドボルトを用い、図１１に示すように、ロッド７０
と図示しないキャップとを締結せんとすれば、図１２に
示すように、頭部９０の側面９０ｂに残留した余肉９３
がロッド７０の一部と干渉し、ボルトを所定の位置にセ
ットできず、この結果使用時に軸力の低下を生じてしま
う。However, in the connecting rod bolt thus obtained, as shown in FIG. 9, an extra thickness is produced when the under-neck relief portion 91b is rolled. This extra thickness rises on the other end side of the under-neck relief portion 91b of the shaft portion 91 and also moves the seat surface 90a of the head portion 90 in the radial direction to move the head portion 9
The side surface 90b of 0 also rises. The extra thickness 92 raised on the other end side of the under-neck relief portion 91b of the shaft portion 91 is
As shown in FIG. 10, since the shaft portion 91 is a simple cylindrical surface, it can be easily crushed by burnishing to prevent interference with the rod.
Since the head 90 is generally irregular in shape, the surplus thickness 93 raised on the side surface 90b of the above is left as it is unless it is subjected to troublesome processing. Using the connecting rod bolt thus obtained, as shown in FIG.
If the cap and a cap (not shown) are fastened together, as shown in FIG.
Interferes with a part of the rod 70, and the bolt cannot be set in a predetermined position, resulting in a decrease in axial force during use.
【０００７】以上、製品をコンロッドボルトとして説明
したが、フランジ部と軸部とを有する首下逃がし部転造
用軸状粗形材に転造を施し、これにより首下逃がし部を
凹設して得られる製品がロッド等の固定部材と固定され
るものであれば、フランジ部の側面に残留する余肉はそ
の固定部材と干渉しやすいため、やはり同様の課題が存
在する。Although the product has been described as the connecting rod bolt, the shaft-shaped rough material for rolling under the neck relief portion having the flange portion and the shaft portion is subjected to rolling, whereby the under neck relief portion is recessed. If the product obtained is fixed to a fixing member such as a rod, the surplus remaining on the side surface of the flange portion is likely to interfere with the fixing member, so that the same problem still exists.
【０００８】本発明は、上記従来の実情に鑑みてなされ
たものであって、フランジ部と軸部とを有する首下逃が
し部転造用軸状粗形材に転造を施し、これにより首下逃
がし部を凹設して得られる製品が固定部材と固定される
ものである場合において、フランジ部の側面に余肉が残
留しないようにすることを解決すべき課題とする。The present invention has been made in view of the above-mentioned conventional circumstances, in which a shaft-shaped coarse material for rolling under-neck relief portion having a flange portion and a shaft portion is rolled, whereby the neck is formed. It is an object to be solved to prevent excess thickness from remaining on the side surface of the flange portion when the product obtained by recessing the lower relief portion is fixed to the fixing member.
【０００９】[0009]
【課題を解決するための手段】本発明の首下逃がし部転
造用軸状粗形材は、フランジ部と、該フランジ部の一端
面から略直角に延出する軸部とを有し、転造により該軸
部における該フランジ部と隣接する端部に環状の首下逃
がし部が凹設されることにより製品とされる首下逃がし
部転造用軸状粗形材において、前記フランジ部の一端面
には、前記首下逃がし部の転造時に生じる余肉を収納す
る凹部が形成されていることを特徴とする。The shaft-shaped rough material for rolling under the neck relief portion of the present invention has a flange portion and a shaft portion extending from the one end face of the flange portion at a substantially right angle. In the axial rough shaped material for rolling under the neck, which is a product by forming an annular under neck relief at the end of the shaft that is adjacent to the flange by rolling, the flange portion One end surface of the is formed with a recess for accommodating extra thickness produced when the under-neck relief portion is rolled.
【００１０】余肉が頭部の側面に盛り上がることはな
く、新しい座面が最大限の面積を確保するように凹部を
設定することが好ましい。It is preferable to set the recess so that the extra seat does not bulge on the side surface of the head and the new seating surface secures the maximum area.
【００１１】[0011]
【作用】本発明の首下逃がし部転造用軸状粗形材に転造
を施して首下逃がし部を凹設する。このとき、やはり余
肉が生じるが、この余肉のうちフランジ部の一端面を径
方向に移動するものは、フランジ部の一端面に形成され
た凹部に収納され、フランジ部の側面に盛り上がること
はない。The shaft-shaped rough material for rolling the under-neck relief portion of the present invention is rolled to form the under-neck relief portion as a recess. At this time, a surplus is still generated, but the surplus that moves in the radial direction on the one end face of the flange is stored in the recess formed on the one end of the flange and rises up on the side surface of the flange. There is no.
【００１２】[0012]
【実施例】以下、本発明を具体化した実施例１〜３を図
面を参照しつつ説明する。 （実施例１）実施例１の首下逃がし部転造用軸状粗形材
もコンロッドボルトを製品として得るために鍛造された
ものである。この粗形材は、図１に示すように、フラン
ジ部としての頭部１と、この頭部１の一端面１ａから略
直角に延出する軸部２とからなる。軸部２と一端面１ａ
との間には、従来と同様、首下丸み部２ａがそのまま残
されている。また、頭部１の一端面１ａは、特徴的な構
成として、図７に示す従来の粗形材Ｗ0 の一端面９０ａ
を基線Ａとした場合、母線Ｂが微小角θだけ全周にわた
って傾斜した円錐面形状に形成されている。こうして、
この粗形材では、頭部１の一端面１ａを従来の粗形材Ｗ
0 の一端面９０ａよりも凹設することで凹部３が形成さ
れている。Embodiments 1 to 3 embodying the present invention will be described below with reference to the drawings. (Embodiment 1) The shaft-shaped rough material for rolling under neck relief portion of Embodiment 1 is also forged in order to obtain a connecting rod bolt as a product. As shown in FIG. 1, this rough material includes a head portion 1 as a flange portion and a shaft portion 2 extending from the one end face 1 a of the head portion 1 at a substantially right angle. Shaft 2 and one end face 1a
Between the and, the under-neck rounded portion 2a is left as it is, as in the conventional case. Further, one end surface 1a of the head portion 1 has a characteristic configuration as one end surface 90a of the conventional rough-shaped material W 0 shown in FIG.
Is the base line A, the generatrix B is formed in the shape of a conical surface that is inclined over the entire circumference by a small angle θ. Thus
In this rough material, one end surface 1a of the head 1 is formed by the conventional rough material W.
The recess 3 is formed by recessing from the one end surface 90a of 0 .
【００１３】図８に示す転造装置を用いてこの粗形材の
軸部２の他端部にねじ転造を行なうとともに首下盗み転
造を行ない、図示しないねじ部を形成するとともに首下
逃がし部２ｂを凹設する。このとき、図２に示すよう
に、やはり余肉４、５が生じるが、この余肉４、５のう
ち頭部１の一端面１ａを径方向に移動する余肉４は凹部
３を順次埋めて行き、新しい一端面で座面４ａを形成す
る。この座面４ａが従来の粗形材Ｗ0 の一端面９０ａと
一致する。このため、余肉４は頭部１の側面１ｂに盛り
上がることはない。なお、軸部２の首下逃がし部２ｂの
他端側に盛り上がった余肉５は、軸部２が単純な円筒面
であることからバニシ仕上げにより容易に押しつぶして
ロッドとの干渉が生じないようにする。Using the rolling apparatus shown in FIG. 8, thread rolling is performed on the other end of the shaft portion 2 of this rough material and undergoing steal rolling is performed to form a screw portion (not shown) and under the neck. The relief portion 2b is recessed. At this time, as shown in FIG. 2, surplus thicknesses 4 and 5 still occur, but of the surplus thicknesses 4 and 5, the surplus thickness 4 which moves the one end face 1a of the head 1 in the radial direction sequentially fills the recess 3. And the seating surface 4a is formed on the new one end surface. The seat surface 4a coincides with the one end surface 90a of the conventional rough-shaped material W 0 . Therefore, the extra thickness 4 does not rise on the side surface 1b of the head 1. In addition, since the shaft portion 2 has a simple cylindrical surface, the extra thickness 5 raised on the other end side of the under-neck relief portion 2b of the shaft portion 2 is easily crushed by burnishing so as not to interfere with the rod. To
【００１４】こうして得られたコンロッドボルトでロッ
ドとキャップとを締結すれば、頭部１の側面１ｂに余肉
４が残留していないため、余肉４とロッドの一部との干
渉は生じず、軸力の低下を生じない。また、このコンロ
ッドボルトでは、軸部２における頭部１と隣接する一端
部に環状の首下逃がし部２ｂが凹設されることにより首
下丸み部２ａが除かれている。また、余肉４が頭部１の
側面１ｂに盛り上がることはなく、新しい座面４ａが最
大限の面積を確保するように凹部３を設定している。こ
のため、このコンロッドボルトでは、座面４ａの平坦面
の拡大により、ロッドとキャップとを大きな軸力で締結
できる。If the rod and the cap are fastened with the connecting rod bolts thus obtained, the surplus thickness 4 does not remain on the side surface 1b of the head 1, so that the surplus thickness 4 does not interfere with a part of the rod. , Axial force does not decrease. Further, in this connecting rod bolt, the under-neck rounded portion 2a is removed by forming an annular under-neck relief portion 2b at one end portion of the shaft portion 2 adjacent to the head portion 1. Moreover, the recess 3 is set so that the extra thickness 4 does not rise to the side surface 1b of the head 1 and the new seat surface 4a secures the maximum area. Therefore, in this connecting rod bolt, the flat surface of the seating surface 4a is enlarged so that the rod and the cap can be fastened with a large axial force.
【００１５】したがって、このコンロッドボルトを用い
たコネクティングロッドは、高額の加工費を必要とする
ことなく、高い耐久性を発揮することができる。 （実施例２）実施例２の首下逃がし部転造用軸状粗形材
もコンロッドボルトを製品として得るために鍛造された
ものである。この粗形材は、図３に示すように、頭部６
と、この頭部６の一端面６ａから略直角に延出する軸部
７とからなる。軸部７と一端面６ａとの間には、従来と
同様、首下丸み部７ａがそのまま残されている。また、
頭部６の一端面６ａは、特徴的な構成として、頭部６の
薄肉側半周が大きく抉られ、頭部６の厚肉側半周が小さ
く抉られた略円錐面形状に形成されている。こうして、
この粗形材では、頭部６の一端面６ａを従来の粗形材Ｗ
0 の一端面９０ａよりも凹設することで凹部８が形成さ
れている。Therefore, the connecting rod using this connecting rod bolt can exhibit high durability without requiring a high processing cost. (Embodiment 2) The shaft-shaped rough material for rolling under neck relief portion of Embodiment 2 is also forged in order to obtain a connecting rod bolt as a product. As shown in FIG. 3, this rough material has a head 6
And a shaft portion 7 extending from the one end surface 6a of the head portion 6 at a substantially right angle. Between the shaft portion 7 and the one end surface 6a, the under-neck rounded portion 7a is left as it is, as in the conventional case. Also,
One end surface 6a of the head 6 is formed in a substantially conical surface shape in which a thin side half circumference of the head 6 is largely carved and a thick side half circumference of the head 6 is carved small as a characteristic configuration. Thus
In this rough material, one end surface 6a of the head 6 is formed by the conventional rough material W.
The recess 8 is formed by being recessed from the one end surface 90a of 0 .
【００１６】実施例１と同様、この粗形材の軸部７の他
端部にねじ転造を行なうとともに首下盗み転造を行な
い、ねじ部を形成するとともに、図４に示すように、首
下逃がし部７ｂを凹設する。このとき、やはり余肉９、
１０が生じるが、この余肉９、１０のうち頭部６の一端
面６ａを径方向に移動する余肉９は凹部８を順次埋めて
行き、新しい一端面で座面９ａを形成する。この座面９
ａが従来の粗形材Ｗ0 の一端面９０ａと一致する。この
ため、余肉９は頭部６の側面６ｂに盛り上がることはな
い。なお、軸部７の首下逃がし部７ｂの他端側に盛り上
がった余肉１０は、実施例１と同様、バニシ仕上げす
る。Similar to the first embodiment, the other end of the shaft portion 7 of this rough shaped member is thread-rolled and under-steal rolling is performed to form the threaded portion, and as shown in FIG. The relief portion 7b under the neck is recessed. At this time, after all 9, extra meat,
10 occurs, but of these surpluses 9, 10, the surplus 9 which moves one end surface 6a of the head 6 in the radial direction sequentially fills the concave portion 8 and forms a seat surface 9a with a new one end surface. This seat 9
a coincides with one end face 90a of the conventional rough material W 0 . Therefore, the extra thickness 9 does not rise on the side surface 6b of the head 6. In addition, the surplus thickness 10 raised on the other end side of the under-neck relief portion 7b of the shaft portion 7 is burnished as in the first embodiment.
【００１７】こうして得られるコンロッドボルトにおい
ても、実施例１と同様の効果を奏することができる。 （実施例３）実施例３の首下逃がし部転造用軸状粗形材
もコンロッドボルトを製品として得るために鍛造された
ものである。この粗形材は、図５（Ａ）及び（Ｂ）に示
すように、頭部１１と、この頭部１１の一端面１１ａか
ら略直角に延出する軸部１２とからなる。軸部１２と一
端面１１ａとの間には、従来と同様、首下丸み部１２ａ
がそのまま残されている。また、頭部１１の一端面１１
ａは、頭部１１の薄肉側約半周が従来の粗形材Ｗ0 の一
端面９０ａと同一とされているが、特徴的な構成とし
て、頭部１１の厚肉側約半周が抉られて半円錐面形状に
形成されている。こうして、この粗形材では、頭部１１
の一端面１１ａを従来の粗形材Ｗ0 の一端面９０ａより
も凹設することで凹部１３が形成されている。The connecting rod bolt thus obtained can also achieve the same effect as that of the first embodiment. (Embodiment 3) The shaft-shaped rough material for rolling under neck relief portion of Embodiment 3 is also forged to obtain a connecting rod bolt as a product. As shown in FIGS. 5 (A) and 5 (B), this rough material is composed of a head portion 11 and a shaft portion 12 extending from the one end surface 11 a of the head portion 11 at a substantially right angle. Between the shaft portion 12 and the one end surface 11a, the under-neck rounded portion 12a is formed as in the conventional case.
Is left as it is. Also, one end face 11 of the head 11
About a, the thin side of the head portion 11 is approximately the same as the one end surface 90a of the conventional rough-shaped material W 0 , but as a characteristic configuration, about the half side of the thick portion of the head portion 11 is carved. It is formed in a semi-conical surface shape. Thus, with this rough material, the head 11
The concave portion 13 is formed by making one end surface 11a of the concave portion more concave than the one end surface 90a of the conventional rough material W 0 .
【００１８】実施例１、２と同様、この粗形材の軸部１
２の他端部にねじ転造を行なうとともに首下盗み転造を
行ない、ねじ部を形成するとともに、図６に示すよう
に、首下逃がし部１２ｂを凹設する。このとき、やはり
余肉１４、１５が生じるが、この余肉１４、１５のうち
頭部１１の一端面１１ａを径方向に移動する余肉１４
は、頭部１１の薄肉側においては頭部１１の側面１１ｂ
にも盛り上がってしまうが、頭部１１の厚肉側において
は凹部１３を順次埋めて行き、新しい一端面で座面１４
ａを形成する。この座面１４ａが従来の粗形材Ｗ0 の一
端面９０ａと一致する。このため、余肉１４は、頭部１
１の厚肉側においては頭部１１の側面１１ｂに盛り上が
ることはない。なお、軸部１２の首下逃がし部１２ｂの
他端側に盛り上がった余肉１５は、実施例１と同様、バ
ニシ仕上げする。Similar to the first and second embodiments, the shaft portion 1 of this rough shaped material is used.
The other end of 2 is thread-rolled and under-steal rolled to form a threaded portion, and as shown in FIG. 6, an under-neck relief portion 12b is provided as a recess. At this time, the surpluses 14 and 15 still occur, but the surpluses 14 and 15 that move the one end surface 11a of the head 11 in the radial direction.
Is a side surface 11b of the head 11 on the thin side of the head 11.
However, on the thick side of the head portion 11, the concave portion 13 is sequentially filled up, and the seat surface 14 is formed on the new one end surface.
a is formed. The seat surface 14a coincides with the one end surface 90a of the conventional rough-shaped material W 0 . For this reason, the extra thickness 14 is the head 1
On the thick side of 1, the side surface 11b of the head portion 11 does not rise. In addition, the surplus thickness 15 raised on the other end side of the under-neck relief portion 12b of the shaft portion 12 is burnished as in the first embodiment.
【００１９】こうして得られるコンロッドボルトでは、
頭部１１の厚肉側がロッドの側方と最も近接するが、頭
部１１の厚肉側においては頭部１１の側面１１ｂに余肉
１４が残留しないことから、やはり実施例１と同様の効
果を奏することができる。なお、実施例１〜３において
種々の凹部を例示したが、本発明に係る凹部はこれらに
限定されるものではなく、放射状の溝等の種々の形状の
ものを採用することができる。In the connecting rod bolt thus obtained,
The thick side of the head portion 11 is closest to the side of the rod, but the thick side of the head portion 11 has no excess thickness 14 on the side surface 11b of the head portion 11. Therefore, the same effect as that of the first embodiment is obtained. Can be played. Although various recesses are illustrated in Examples 1 to 3, the recess according to the present invention is not limited to these, and various shapes such as radial grooves can be adopted.
【００２０】[0020]
【発明の効果】以上詳述したように、本発明の首下逃が
し部転造用軸状粗形材に転造を施し、これにより首下逃
がし部を凹設すれば、得られる製品はフランジ部の側面
に余肉が残留しない。したがって、この首下逃がし部転
造用軸状粗形材により得られる製品は、高額の加工費を
必要とすることなく、固定部材と大きな軸力で固定可能
なものとなる。As described in detail above, if the shaft-shaped rough material for rolling the under-neck relief portion of the present invention is subjected to rolling and the under-neck relief portion is recessed, the product obtained is a flange. No excess meat remains on the side of the part. Therefore, the product obtained by the shaft-shaped rough material for rolling under the neck relief portion can be fixed to the fixing member with a large axial force without requiring a high processing cost.
【図１】実施例１の首下逃がし部転造用軸状粗形材の一
部側面図である。FIG. 1 is a partial side view of a shaft-shaped rough material for rolling under neck relief portion according to a first embodiment.
【図２】実施例１の首下逃がし部転造用軸状粗形材によ
り得られたコンロッドボルトの一部側面図である。FIG. 2 is a partial side view of the connecting rod bolt obtained from the shaft-shaped rough material for rolling under neck relief portion of the first embodiment.
【図３】実施例２の首下逃がし部転造用軸状粗形材の一
部側面図である。FIG. 3 is a partial side view of a shaft-shaped rough material for rolling under neck relief portion according to a second embodiment.
【図４】実施例２の首下逃がし部転造用軸状粗形材によ
り得られたコンロッドボルトの一部側面図である。FIG. 4 is a partial side view of a connecting rod bolt obtained from a shaft-shaped rough material for rolling under neck relief portion of Example 2;
【図５】実施例３の首下逃がし部転造用軸状粗形材に係
り、（Ａ）は一部側面図、（Ｂ）は軸部からみた底面図
である。5A and 5B relate to a shaft-shaped rough material for rolling under neck relief portion of Example 3, (A) is a partial side view, and (B) is a bottom view seen from the shaft portion.
【図６】実施例３の首下逃がし部転造用軸状粗形材によ
り得られたコンロッドボルトの一部側面図である。FIG. 6 is a partial side view of a connecting rod bolt obtained from a shaft-shaped rough material for rolling under head relief portion of Example 3;
【図７】従来の粗形材の一部側面図である。FIG. 7 is a partial side view of a conventional rough material.
【図８】従来の粗形材と、転造装置との一部断面図であ
る。FIG. 8 is a partial cross-sectional view of a conventional rough material and a rolling device.
【図９】従来の粗形材により得られた転造直後のコンロ
ッドボルトの一部破断断面側面図である。FIG. 9 is a partially cutaway cross-sectional side view of a connecting rod bolt immediately after rolling, which is obtained from a conventional crude material.
【図１０】従来の粗形材により得られたコンロッドボル
トの一部破断断面側面図である。FIG. 10 is a side view, partly in cross section, of a connecting rod bolt obtained from a conventional rough material.
【図１１】従来のコンロッドボルトとロッドとの締結状
態を示す側面図である。FIG. 11 is a side view showing a fastening state of a conventional connecting rod bolt and a rod.
【図１２】図１１のＸＩＩ拡大断面図である。12 is an enlarged sectional view taken along line XII of FIG.
１、６、１１…頭部（フランジ部） ２、７、１２…軸
部 ２ｂ、７ｂ、１２ｂ…首下逃がし部 １ａ、６ａ、１１
ａ…一端面 ４、５、９、１０、１４、１５…余肉 ３、
８、１３…凹部1, 6, 11 ... Head (flange) 2, 7, 12 ... Shafts 2b, 7b, 12b ... Under neck relief 1a, 6a, 11
a ... One end surface 4, 5, 9, 10, 14, 15 ... Extra thickness 3,
8, 13 ... Recess
Claims (1)
略直角に延出する軸部とを有し、転造により該軸部にお
ける該フランジ部と隣接する端部に環状の首下逃がし部
が凹設されることにより製品とされる首下逃がし部転造
用軸状粗形材において、 前記フランジ部の一端面には、前記首下逃がし部の転造
時に生じる余肉を収納する凹部が形成されていることを
特徴とする首下逃がし部転造用軸状粗形材。1. A ring-shaped under-neck relief having a flange portion and a shaft portion extending from one end surface of the flange portion at a substantially right angle, and rolling the end portion of the shaft portion adjacent to the flange portion. In the shaft-shaped rough material for rolling the under-neck relief portion, which is a product due to the recessed portion, the excess thickness generated during the rolling of the under-neck relief portion is stored on one end surface of the flange portion. A shaft-shaped rough material for rolling under neck relief, which is characterized in that a recess is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7573395A JPH08267165A (en) | 1995-03-31 | 1995-03-31 | Shaftlike rough shape material for form rolling of under head recess of thread portion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7573395A JPH08267165A (en) | 1995-03-31 | 1995-03-31 | Shaftlike rough shape material for form rolling of under head recess of thread portion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08267165A true JPH08267165A (en) | 1996-10-15 |
Family
ID=13584779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7573395A Pending JPH08267165A (en) | 1995-03-31 | 1995-03-31 | Shaftlike rough shape material for form rolling of under head recess of thread portion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08267165A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004347126A (en) * | 2004-07-28 | 2004-12-09 | Ntn Corp | Dynamic pressure bearing unit |
| US6957296B2 (en) | 1996-09-20 | 2005-10-18 | Denso Corporation | Memory writing device for an electronic device |
| JP2007232135A (en) * | 2006-03-02 | 2007-09-13 | Ntn Corp | Rocking bearing |
| JP2011510242A (en) | 2008-01-24 | 2011-03-31 | アキュメント ゲーエムベーハー ウント コー オーハーゲー | Screw-in inserts and vehicle parts |
| JP2020163445A (en) * | 2019-03-29 | 2020-10-08 | 日東精工株式会社 | Method of manufacturing headed part |
-
1995
- 1995-03-31 JP JP7573395A patent/JPH08267165A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6957296B2 (en) | 1996-09-20 | 2005-10-18 | Denso Corporation | Memory writing device for an electronic device |
| US7493455B2 (en) | 1996-09-20 | 2009-02-17 | Denso Corporation | Memory writing device for an electronic device |
| JP2004347126A (en) * | 2004-07-28 | 2004-12-09 | Ntn Corp | Dynamic pressure bearing unit |
| JP2007232135A (en) * | 2006-03-02 | 2007-09-13 | Ntn Corp | Rocking bearing |
| JP2011510242A (en) | 2008-01-24 | 2011-03-31 | アキュメント ゲーエムベーハー ウント コー オーハーゲー | Screw-in inserts and vehicle parts |
| JP2020163445A (en) * | 2019-03-29 | 2020-10-08 | 日東精工株式会社 | Method of manufacturing headed part |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6220475B1 (en) | Expanded cans | |
| US5826988A (en) | Cage for needle roller bearings and method of producing same | |
| US6227709B1 (en) | Bearing shell with retaining cam and method for production thereof | |
| JP3046645B2 (en) | Method of manufacturing raceway for split bearings | |
| JPH038805Y2 (en) | ||
| JPH08267165A (en) | Shaftlike rough shape material for form rolling of under head recess of thread portion | |
| US4821388A (en) | Method for processing a nut seat on a wheel | |
| US6425182B1 (en) | Method of making roller cage for roller bearing | |
| US6591657B1 (en) | Method of manufacturing ball joint | |
| JPS62244545A (en) | Forging method for crank shaft | |
| JP3648801B2 (en) | Roller bearing roller manufacturing method | |
| JPH0636949B2 (en) | Neck-in can body manufacturing method | |
| JPH0231248B2 (en) | ||
| US6234704B1 (en) | Ball stud, method and apparatus for production thereof, and ball joint | |
| JP3928146B2 (en) | Ring-shaped roll forming device | |
| JPS605951Y2 (en) | Hot forging mold | |
| JPH0551600U (en) | Die cutter roll device | |
| JPH07308727A (en) | Form rolling die | |
| KR20100082730A (en) | Securing nut | |
| JP4076253B2 (en) | Bearing inner ring, manufacturing method thereof, and clutch release bearing | |
| JPH0523902A (en) | Method for finishing internal surface of split plain bearing | |
| WO2003062654A1 (en) | Method for machining crankpins of a crankshaft | |
| JPH08118300A (en) | Manufacture of split bearing | |
| JPH0519123Y2 (en) | ||
| US5090229A (en) | Apparatus for supporting a workpiece |