JP3023353B1 - Connector bolt and manufacturing method thereof - Google Patents
Connector bolt and manufacturing method thereofInfo
- Publication number
- JP3023353B1 JP3023353B1 JP10313056A JP31305698A JP3023353B1 JP 3023353 B1 JP3023353 B1 JP 3023353B1 JP 10313056 A JP10313056 A JP 10313056A JP 31305698 A JP31305698 A JP 31305698A JP 3023353 B1 JP3023353 B1 JP 3023353B1
- Authority
- JP
- Japan
- Prior art keywords
- hose
- connector bolt
- hose fitting
- thin
- pipe
- 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
Landscapes
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Forging (AREA)
Abstract
【要約】
【課題】 ホース嵌合部のシール性が高く、かつ強度の
高いコネクタボルトの製造方法を提供する
【解決手段】 このコネクタボルトの製造方法において
は、パイプ材１に冷間鍛造絞り加工を施して、一方の端
部側に薄肉円筒部３を形成する一方、他方の端部側に厚
肉円筒部４を形成する。そして、厚肉円筒部４に冷間鍛
造据え込み加工を施してねじ締付部５を形成する。次
に、この薄肉円筒部３にバルジ加工を施してホース抜け
止め部６を形成する。さらに、厚肉円筒部４に雄ねじ７
を形成し、この後表面処理を施してコネクタボルトＣを
完成させる。かくして、ホース嵌合部３のシール性が高
く、かつ強度の高いコネクタボルトＣが得られる。The present invention provides a method for manufacturing a connector bolt having a high sealing property at a hose fitting portion and a high strength. In this method for manufacturing a connector bolt, a cold forging drawing process is performed on a pipe material 1. To form a thin-walled cylindrical portion 3 on one end side and a thick-walled cylindrical portion 4 on the other end side. Then, the thick cylindrical portion 4 is subjected to cold forging upsetting to form the screw tightening portion 5. Next, the thin cylindrical portion 3 is subjected to a bulging process to form a hose retaining portion 6. Further, a male screw 7 is attached to the thick cylindrical portion 4.
After that, a surface treatment is performed to complete the connector bolt C. Thus, a connector bolt C having a high sealing property of the hose fitting portion 3 and a high strength can be obtained.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ホース嵌合部のシ
ール性が高くかつ強度が高い一体式のコネクタボルト及
びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integral connector bolt having a high sealing property at a hose fitting portion and a high strength, and a method of manufacturing the same.
【０００２】[0002]
【従来の技術】一般に、伸縮性ないしは可撓性を有する
ホース（例えば、ゴムホース等）を、箱状あるいは壁状
の硬い部材（以下、これを「相手部材」という）に形成
された流体通路（例えば、エンジンのウォータジャケッ
ト等）に接続する場合は、コネクタボルトが用いられ
る。かかるコネクタボルトにおいては、普通、該コネク
タボルトをコネクタボルト軸線方向に貫通する管路（流
体通路）が設けられる一方、コネクタボルト軸線方向に
みて一方の端部側にホースを外嵌するためのホース嵌合
部が設けられ、他方の端部側に該コネクタボルトを相手
部材に螺入するためのねじ部が設けられる。また、ホー
ス嵌合部とねじ部との間には、工具を用いて該コネクタ
ボルトを相手部材に螺入する際に、該工具と係合させる
ためのねじ締付部が設けられる。2. Description of the Related Art In general, a hose having elasticity or flexibility (for example, a rubber hose or the like) is formed into a fluid passage (hereinafter referred to as a "partner member") formed in a box-shaped or wall-shaped hard member (hereinafter referred to as a "partner member"). For example, when connecting to a water jacket of an engine, a connector bolt is used. In such a connector bolt, a pipe (fluid passage) penetrating the connector bolt in the axial direction of the connector bolt is provided, while a hose for externally fitting a hose to one end side in the axial direction of the connector bolt is provided. A fitting portion is provided, and a screw portion for screwing the connector bolt into a mating member is provided on the other end side. Further, a screw tightening portion is provided between the hose fitting portion and the screw portion for engaging with the tool when the connector bolt is screwed into the mating member by using the tool.
【０００３】かかるコネクタボルトとしては、単一の材
料から冷間鍛造及び切削加工により製作される一体式の
コネクタボルトと、互いに別部材であるパイプ部材とね
じ部材とを接合（嵌合）することにより製作される組立
式のコネクタボルトとが、従来より知られている。そし
て、従来の一体式のコネクタボルトは、例えば次のよう
な手順で製作されている。As such a connector bolt, an integral connector bolt manufactured by cold forging and cutting from a single material, and a pipe member and a screw member, which are separate members, are joined (fitted). 2. Description of the Related Art An assembly type connector bolt manufactured by KK has been conventionally known. The conventional integrated connector bolt is manufactured, for example, in the following procedure.
【０００４】すなわち、図４（ａ）に示すように、まず
金属材料からなる中実丸棒素材に複数工程からなる冷間
鍛造加工を施し、内部に中空部１００（管路の一部）が
形成された第１円柱部１０１と、第２円柱部１０２と、
両円柱部１０１、１０２間に位置するねじ締付部１０３
とを備えたコネクタボルト中間体を形成する。なお、冷
間鍛造工程において、図４（ａ）に示す形状のコネクタ
ボルト中間体を得ようとすれば、通常は４工程の冷間鍛
造が必要であるが、かかる工程の詳細は一般に知られて
いるので、その説明を省略する。That is, as shown in FIG. 4 (a), a solid round bar made of a metal material is first subjected to cold forging in a plurality of steps, and a hollow portion 100 (part of a pipe) is formed therein. A first cylindrical portion 101 formed, a second cylindrical portion 102,
Screw tightening portion 103 located between both cylindrical portions 101 and 102
And forming a connector bolt intermediate with: In order to obtain a connector bolt intermediate having the shape shown in FIG. 4 (a) in the cold forging step, usually four cold forging steps are necessary, but details of such steps are generally known. Therefore, the description is omitted.
【０００５】続いて、図４（ｂ）に示すように、第１円
柱部１０１の外周部に切削加工を施して斜線部分１０１
ａを除去し、ホース抜け止め部１０４と直管部１０５と
を備えた所定の形状のホース嵌合部１０６を形成する。
次に、図４（ｃ）に示すように、転造加工により、第２
円柱部１０２の外周部に雄ねじ１０７を形成する。[0005] Subsequently, as shown in FIG. 4 (b), the outer peripheral portion of the first columnar portion 101 is subjected to cutting to form a hatched portion 101.
a is removed, and a hose fitting portion 106 having a predetermined shape including a hose retaining portion 104 and a straight pipe portion 105 is formed.
Next, as shown in FIG.
A male screw 107 is formed on the outer periphery of the cylindrical portion 102.
【０００６】さらに、図４（ｄ）に示すように、切削加
工により、ねじ側端面（右側端面）から第２円柱部１０
２とねじ締付部１０３とホース嵌合部１０６の一部とを
コネクタボルト軸線方向に貫通して中空部１００と連通
する穴部１０８を形成して管路を完成させる。これによ
り、一体式のコネクタボルトが完成する。Further, as shown in FIG. 4D, the second cylindrical portion 10 is cut from the screw side end surface (right end surface) by cutting.
2, a hole 108 that penetrates through the screw tightening portion 103 and a part of the hose fitting portion 106 in the axial direction of the connector bolt and communicates with the hollow portion 100 is formed, thereby completing the conduit. Thereby, an integrated connector bolt is completed.
【０００７】また、従来の組立式のコネクタボルトは、
例えば図５に示すように、ホース抜け止め部１１０と直
管部１１１と中空部１１２と備えたパイプ部材１１３を
製作する一方、雄ねじ１１４とねじ締付部１１５と穴部
１１６とを備えたねじ部材１１７を製作し、パイプ部材
１１３の端部とねじ部材１１７の端部とをろう付け、溶
接等により接合することにより製作されている。ここ
で、パイプ部材１１３はホースを外嵌するためのホース
嵌合部となる。なお、パイプ部材１１３ないしはホース
嵌合部の先端部近傍に形成されるホース抜け止め部１１
０（ホース抜け防止隆起）はバルジ加工で形成される。[0007] The conventional assembly type connector bolt is
For example, as shown in FIG. 5, a pipe member 113 having a hose retaining portion 110, a straight pipe portion 111, and a hollow portion 112 is manufactured, while a screw having a male screw 114, a screw tightening portion 115, and a hole portion 116 is formed. The member 117 is manufactured by brazing the end of the pipe member 113 and the end of the screw member 117 and joining them by welding or the like. Here, the pipe member 113 serves as a hose fitting portion for fitting the hose outside. The hose stopper portion 11 formed near the tip of the pipe member 113 or the hose fitting portion.
0 (hose removal prevention ridge) is formed by bulging.
【０００８】なお、組立式のコネクタボルトは、例えば
図６に示すように、ホース抜け止め部１２０と直管部１
２１と中空部１２２と備えたパイプ部材１２３を製作す
る一方、雄ねじ１２４とねじ締付部１２５と穴部１２６
とを備えたねじ部材１２７を製作し、パイプ部材１２３
をねじ部材１２７の穴部１２６に挿入した後、パイプ部
材１２３の端面にフレア加工（口広げ加工）を施し、相
手部材とのシール面を形成するとともに、パイプ部材１
２３とねじ部材１２７とを接合するといった手法によっ
ても製作されている。As shown in FIG. 6, for example, assembling type connector bolts are provided with a hose retaining portion 120 and a straight pipe portion 1.
While producing a pipe member 123 having a hollow portion 122 and a hollow portion 122, a male screw 124, a screw tightening portion 125, and a hole portion 126 are formed.
Is manufactured, and the pipe member 123 is provided.
Is inserted into the hole 126 of the screw member 127, the end surface of the pipe member 123 is subjected to flaring (opening process) to form a seal surface with a mating member, and the pipe member 1
It is also manufactured by a method such as joining the screw 23 and the screw member 127.
【０００９】図７に示すように、このフレア加工による
組立式のコネクタボルトの場合は、相手部材１３０にコ
ネクタボルトを螺入する（締め付ける）ことにより、パ
イプ部材１２３の口広げ部のシール面と相手部材１３０
のシール面とを密着させて流体の漏れを防止するととも
に、該コネクタボルトを相手部材１３０に締結するよう
にしている。As shown in FIG. 7, in the case of an assembling type connector bolt formed by this flare processing, the connector bolt is screwed (tightened) into the mating member 130 to make the sealing surface of the flared portion of the pipe member 123 clear. Counterpart member 130
To prevent leakage of fluid, and to fasten the connector bolt to the mating member 130.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、例えば
図４（ａ）〜（ｄ）に示すような手順で製作される従来
の一体式のコネクタボルトでは、シール性が要求される
ホース嵌合部１０６が切削加工で形成されるので、その
外周部（シール部）に生じる螺旋状のツールマーク（切
削疵）により、そのシール性が低下するといった問題が
ある。However, in a conventional integrated connector bolt manufactured by the procedure shown in FIGS. 4 (a) to 4 (d), for example, the hose fitting portion 106 which requires a sealing property is required. Is formed by cutting, so that there is a problem that the sealing property is deteriorated by a spiral tool mark (cutting flaw) generated on the outer peripheral portion (seal portion).
【００１１】また、例えば図５に示すような従来の組立
式のコネクタボルトでは、パイプ部材１１３とねじ部材
１１７とを、ろう付け、溶接等で接合している関係上、
接合部（嵌合部）の強度が不足するといった問題や、接
合欠陥（漏れ）が生じることがあるといった問題があ
る。また、ろう付け、溶接等を行う際に、その熱の影響
（熱変形）により、コネクタボルトのパイプ部材（ホー
ス嵌合部）の真円度が低下して、シール性が悪くなると
いった問題もある。Further, in a conventional connector bolt of a conventional assembly type as shown in FIG. 5, for example, the pipe member 113 and the screw member 117 are joined by brazing, welding, or the like.
There is a problem that the strength of the joining portion (fitting portion) is insufficient and a problem that a joining defect (leakage) may occur. In addition, when performing brazing, welding, or the like, due to the effect of heat (thermal deformation), the roundness of the pipe member (hose fitting portion) of the connector bolt is reduced, and the sealing property is deteriorated. is there.
【００１２】さらに、例えば図６ないし図７に示すよう
な、フレア加工による従来の組立式のコネクタボルトで
は、パイプ部材１２３（ホース嵌合部）に外嵌したホー
ス等から伝達される振動により、シール部界面に摩耗、
変形等が生じ、液体の漏れが発生することがあるといっ
た問題がある。Further, in a conventional assembling type connector bolt by flaring as shown in FIGS. 6 and 7, for example, vibration transmitted from a hose or the like externally fitted to the pipe member 123 (hose fitting portion) causes Wear on the interface of the seal,
There is a problem that deformation or the like occurs and liquid leakage may occur.
【００１３】本発明は、上記従来の問題を解決するため
になされたものであって、ホース嵌合部のシール性が高
く、かつ強度の高いコネクタボルトないしはその製造方
法を提供することを解決すべき課題とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a connector bolt having a high sealing property at a hose fitting portion and a high strength, or a method of manufacturing the same. Should be a task to be done.
【００１４】[0014]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明にかかるコネクタボルトの製造方法
は、（ａ）コネクタボルト軸線方向に伸び両端がそれぞ
れ外部に開口する管路と、コネクタボルト軸線方向にみ
て一方の端部側に位置しホースを外嵌することができる
薄肉のホース嵌合部と、他方の端部側に位置し外周部に
雄ねじが形成された厚肉のねじ部と、ホース嵌合部とね
じ部との間に位置し該ねじ部よりも大径のねじ締付部と
が設けられているコネクタボルトの製造方法であって、
（ｂ）鍛造可能な材料からなる円筒形のパイプ材に鍛造
絞り加工を施して、パイプ軸線方向にみて一方の端部側
に位置しホース嵌合部をなす薄肉円筒部と、他方の端部
側に位置する厚肉円筒部とを形成し、（ｃ）厚肉円筒部
に鍛造据え込み加工を施して、厚肉円筒部の、薄肉円筒
部との境界部近傍に、該厚肉円筒部よりも大径のねじ締
付部を形成し、（ｄ）厚肉円筒部の外周部に転造加工を
施して雄ねじを形成し、ねじ部を形成するようにしたこ
とを特徴とするものである。Means for Solving the Problems To solve the above-mentioned problems, a method for manufacturing a connector bolt according to the present invention comprises: (a) a pipe extending in the axial direction of the connector bolt and having both ends open to the outside; A thin-walled hose fitting portion which is located at one end side of the connector bolt in the axial direction and to which the hose can be fitted, and a thick-walled screw which is located at the other end side and has an external thread formed on an outer peripheral portion. Part, a method for manufacturing a connector bolt provided between the hose fitting part and the screw part, a screw tightening part having a larger diameter than the screw part,
(B) A forging drawing process is performed on a cylindrical pipe material made of a forgeable material, and a thin cylindrical portion which is located at one end side and forms a hose fitting portion when viewed in the pipe axis direction, and the other end portion. And (c) subjecting the thick-walled cylindrical portion to forging upsetting to form a thick-walled cylindrical portion near the boundary between the thick-walled cylindrical portion and the thin-walled cylindrical portion. (D) forming an external thread by rolling the outer peripheral portion of the thick-walled cylindrical portion to form a male thread, thereby forming a threaded portion. is there.
【００１５】このコネクタボルトの製造方法において
は、切削加工ではなく鍛造絞り加工によりホース嵌合部
が形成されるので、ホース嵌合部の外周部に螺旋状のツ
ールマーク（切削疵）が発生せず、したがって外周面が
平滑面となる。このため、ホースとホース嵌合部との間
のシール性が大幅に高められる。また、コネクタボルト
が一体成形により製作されるので、その強度ないし耐久
性が大幅に高められる。なお、ろう付け、溶接等の接合
が不要であるので、接合欠陥による漏れ、熱変形等が生
じないのはもちろんである。In this method of manufacturing a connector bolt, since the hose fitting portion is formed by forging drawing instead of cutting, a spiral tool mark (cutting flaw) is generated on the outer peripheral portion of the hose fitting portion. Therefore, the outer peripheral surface becomes a smooth surface. For this reason, the sealing performance between the hose and the hose fitting portion is greatly improved. Further, since the connector bolt is manufactured by integral molding, its strength or durability is greatly enhanced. Since joining such as brazing and welding is unnecessary, it goes without saying that leakage, thermal deformation, and the like due to joining defects do not occur.
【００１６】このコネクタボルトの製造方法において
は、ホースとホース嵌合部との間の嵌合性ないしはシー
ル性を一層高めるために、かつホースの抜け落ちを防止
するために、薄肉円筒部の先端部近傍に、バルジ加工を
施して該薄肉円筒部よりも大径のホース抜け止め部（隆
起部）を形成するのが好ましい。なお、鍛造は、冷間鍛
造で行うのが好ましい。In this method of manufacturing a connector bolt, the tip of the thin-walled cylindrical portion is formed in order to further enhance the fitting or sealing between the hose and the hose fitting portion and to prevent the hose from falling off. In the vicinity, it is preferable to perform a bulge process to form a hose retaining portion (raised portion) having a diameter larger than that of the thin cylindrical portion. The forging is preferably performed by cold forging.
【００１７】また、本発明にかかるパイプから一体成形
されたコネクタボルトは、（ａ）コネクタボルト軸線方
向に伸び両端がそれぞれ外部に開口する管路と、（ｂ）
コネクタボルト軸線方向にみて一方の端部側に位置し、
その外周面が平滑面であり、ホースを外嵌することがで
きる略円筒形の薄肉のホース嵌合部と、（ｃ）他方の端
部側に位置し、外周部に雄ねじが形成された略円筒形の
厚肉のねじ部と、（ｄ）ホース嵌合部とねじ部との間に
位置し、径方向外向きに膨出する屈曲部を備えた、ねじ
部よりも大径の角柱形のねじ締付部とが設けられている
ことを特徴とするものである。Further, the connector bolt integrally formed from the pipe according to the present invention comprises: (a) a conduit extending in the axial direction of the connector bolt and having both ends open to the outside;
It is located on one end side when viewed in the axial direction of the connector bolt,
A substantially cylindrical thin-walled hose fitting portion whose outer peripheral surface is a smooth surface to which the hose can be externally fitted; and (c) a substantially external thread formed on the outer peripheral portion and located on the other end side. A prismatic cylinder having a larger diameter than the threaded portion, having a cylindrical thick threaded portion and (d) a bent portion which is located between the hose fitting portion and the threaded portion and bulges radially outward. And a screw tightening portion.
【００１８】このコネクタボルトにおいては、ホース嵌
合部の外周面が平滑面であるので、ホースとホース嵌合
部との間のシール性が大幅に高められる。また、コネク
タボルトが一体成形されているので、その強度が大幅に
高められる。なお、ろう付け、溶接等による接合部が存
在しないので、接合欠陥による漏れ、熱変形等が生じな
いのはもちろんである。In this connector bolt, since the outer peripheral surface of the hose fitting portion is a smooth surface, the sealing property between the hose and the hose fitting portion is greatly improved. Further, since the connector bolt is integrally formed, its strength is greatly increased. In addition, since there is no joining part by brazing, welding, or the like, it goes without saying that leakage, thermal deformation, and the like due to joining defects do not occur.
【００１９】このコネクタボルトにおいては、ホースと
ホース嵌合部との間の嵌合性ないしはシール性を一層高
めるために、かつホースの抜け落ちを防止するために、
ホース嵌合部の先端部近傍に、該ホース嵌合部の直管部
よりも大径のホース抜け止め部（隆起部）が形成されて
いるのが好ましい。また、ホースをホース嵌合部に嵌合
させる際に、ホースの位置決めを容易にするために、ホ
ース嵌合部のコネクタボルト軸線方向の所定の部位に、
該ホース嵌合部の直管部よりも大径のホース位置決め部
（隆起部）が形成されているのがより好ましい。In this connector bolt, in order to further improve the fitting property or sealing property between the hose and the hose fitting portion, and to prevent the hose from falling off,
It is preferable that a hose retaining portion (raised portion) having a larger diameter than the straight pipe portion of the hose fitting portion is formed near the distal end portion of the hose fitting portion. Also, when fitting the hose to the hose fitting portion, in order to facilitate the positioning of the hose, a predetermined portion of the hose fitting portion in the axial direction of the connector bolt,
It is more preferable that a hose positioning portion (raised portion) having a larger diameter than the straight pipe portion of the hose fitting portion is formed.
【００２０】[0020]
【発明の実施の形態】以下、本発明の実施の形態を具体
的に説明する。以下、図１（ａ）〜（ｅ）を参照しつ
つ、本発明にかかる一体式のコネクタボルトの製造方法
を説明する。なお、以下では便宜上、図１（ａ）〜
（ｅ）中の位置関係（左右方向）でもって、コネクタボ
ルトないしはその中間体（コネクタボルト中間体）の位
置ないしは部位をあらわすことにする。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below. Hereinafter, a method for manufacturing an integrated connector bolt according to the present invention will be described with reference to FIGS. 1 (a) to 1 (e). In the following, for convenience, FIGS.
(E) The position or part of the connector bolt or its intermediate body (connector bolt intermediate body) is represented by the positional relationship (left-right direction) in (e).
【００２１】図１（ａ）に示すように、このコネクタボ
ルトの製造工程においては、まず冷間鍛造が可能な金属
材料からなる円筒形のパイプ材１（コネクタボルト中間
体１）が、コネクタボルトの素材として製作（準備）さ
れる。このパイプ材１には、これをパイプ軸線方向（コ
ネクタボルト軸線方向）に貫通する円柱形の中空部２が
形成されている。このパイプ材１は、コイル状のパイプ
を矯正切断したもの、直管パイプを定尺切断したもの、
あるいは中実棒材（コイル状）から冷間鍛造で定尺パイ
プを成形したものなどを用いることができる。As shown in FIG. 1 (a), in the process of manufacturing the connector bolt, first, a cylindrical pipe material 1 (connector bolt intermediate 1) made of a metal material which can be cold forged is connected to the connector bolt. It is produced (prepared) as a material. The pipe member 1 has a cylindrical hollow portion 2 penetrating the pipe member 1 in the pipe axis direction (the connector bolt axis direction). This pipe material 1 is obtained by straightening a coiled pipe, cutting a straight pipe by a fixed length,
Alternatively, it is possible to use, for example, one obtained by forming a fixed-length pipe from a solid bar (coil shape) by cold forging.
【００２２】続いて、図１（ｂ）に示すように、パイプ
材１に冷間鍛造絞り加工を施して、パイプ軸線方向（図
１（ｂ）では左右方向）にみて左側の部分に、肉厚が比
較的薄い薄肉円筒部３（シール部）を形成する。この薄
肉円筒部３は最終的には、ホース８（図2参照）を外嵌
するホース嵌合部３となる。ここで、パイプ材１の右側
の部分はとくには変形せず、厚肉円筒部４となる（すな
わち、厚肉円筒部４が形成される）。なお、薄肉円筒部
３の外径は厚肉円筒部４の外径よりも小さい。この冷間
鍛造絞り加工においては、パイプ材１の中空部２に、こ
れと係合する芯金（図示せず）を挿入して成形を行うよ
うにしているので、冷間鍛造絞り加工後も、中空部２の
内径（直径）は、ほとんど寸法変化を生じない。Subsequently, as shown in FIG. 1 (b), the pipe material 1 is subjected to cold forging drawing, and the left portion of the pipe material in the axial direction (the left-right direction in FIG. 1 (b)) is provided with meat. The thin cylindrical portion 3 (seal portion) having a relatively small thickness is formed. The thin cylindrical portion 3 finally becomes a hose fitting portion 3 for externally fitting the hose 8 (see FIG. 2). Here, the right portion of the pipe material 1 is not particularly deformed, and becomes the thick cylindrical portion 4 (that is, the thick cylindrical portion 4 is formed). Note that the outer diameter of the thin cylindrical portion 3 is smaller than the outer diameter of the thick cylindrical portion 4. In this cold forging drawing, a core metal (not shown) that engages with the hollow portion 2 of the pipe material 1 is inserted into the hollow portion 2 for forming. The inner diameter (diameter) of the hollow portion 2 hardly changes in size.
【００２３】次に、図１（ｃ）に示すように、厚肉円筒
部４に、冷間鍛造据え込み加工を施して、該厚肉円筒部
４の、薄肉円筒部３との境界部近傍に、該厚肉円筒部４
よりも大径の異形部５を形成する。つまり、薄肉円筒部
３（ホース嵌合部）と厚肉円筒部４（ねじ転造前におけ
るねじ部）との間に、この後の工程で形成されるべきね
じ部４よりも大きな径の異形部５を形成する。なお、異
形部５を形成する際には、厚肉円筒部４の肉部を径方向
外向きに膨出させつつ据え込むので、屈曲部５ａが形成
される。この異形部５は、冷間鍛造据え込み加工時に、
又は後加工により、その外形が六角形あるいは四角形に
成形されてねじ締付部５となる。このねじ締付部５は、
コネクタボルト完成後において、該コネクタボルトを工
具を用いて相手部材９（図２参照）に締め付ける際に工
具と係合する。Next, as shown in FIG. 1 (c), the thick-walled cylindrical portion 4 is subjected to cold forging upsetting, and the vicinity of the boundary between the thick-walled cylindrical portion 4 and the thin-walled cylindrical portion 3 is formed. The thick cylindrical portion 4
The deformed portion 5 having a larger diameter than that of the second portion is formed. That is, between the thin cylindrical portion 3 (hose fitting portion) and the thick cylindrical portion 4 (the thread portion before thread rolling), the irregular shape having a larger diameter than the thread portion 4 to be formed in the subsequent process. The part 5 is formed. When forming the deformed portion 5, since the thick portion of the thick cylindrical portion 4 is set up while bulging radially outward, the bent portion 5a is formed. This deformed part 5 is used for upsetting cold forging.
Alternatively, the external shape is formed into a hexagonal or quadrangular shape by post-processing to form the screw tightening portion 5. This screw tightening part 5
After the connector bolt is completed, the connector bolt engages with the tool when the connector bolt is tightened to the mating member 9 (see FIG. 2) using the tool.
【００２４】さらに、図１（ｄ）に示すように、薄肉円
筒部３の左端部近傍に、バルジ加工を施して該薄肉円筒
部３の直管部よりも大径のホース抜け止め部６を形成す
る。これにより、薄肉円筒部３はホース嵌合部３とな
る。このホース抜け止め部６は、ホース８（図2参照）
をホース嵌合部３に外嵌した後、ホース８がホース嵌合
部３から抜け落ちるのを防止するとともに、ホース８と
ホース嵌合部３（コネクタボルト）との間のシール性を
向上させるために設けられる。なお、必要がなければ、
ホース抜け止め部６の形成を省いてもよい。Further, as shown in FIG. 1 (d), bulge processing is performed near the left end of the thin-walled cylindrical portion 3 to form a hose stopper portion 6 having a diameter larger than that of the straight pipe portion of the thin-walled cylindrical portion 3. Form. Thereby, the thin cylindrical portion 3 becomes the hose fitting portion 3. The hose retaining portion 6 is connected to a hose 8 (see FIG. 2).
In order to prevent the hose 8 from falling off from the hose fitting part 3 after fitting the hose 8 to the hose fitting part 3 and to improve the sealing property between the hose 8 and the hose fitting part 3 (connector bolt). Is provided. If you do not need it,
The formation of the hose retaining portion 6 may be omitted.
【００２５】この後、図１（ｅ）に示すように、厚肉円
筒部４の外周部に転造加工を施して雄ねじ７を形成す
る。これにより、厚肉円筒部４はねじ部４となる。最後
に、該コネクタボルト中間体１の外周面に腐食防止用の
表面処理を施す。これにより、コネクタボルトＣが完成
する。なお、必要がなければ、この表面処理は省いても
よい。Thereafter, as shown in FIG. 1E, the outer peripheral portion of the thick cylindrical portion 4 is subjected to a rolling process to form a male screw 7. Thereby, the thick cylindrical portion 4 becomes the screw portion 4. Finally, the outer peripheral surface of the connector bolt intermediate 1 is subjected to a surface treatment for preventing corrosion. Thereby, the connector bolt C is completed. If necessary, this surface treatment may be omitted.
【００２６】図１から明らかなとおり、このようにして
製造されたコネクタボルトＣは、コネクタボルト軸線方
向（左右方向）に伸び、左右の両端がそれぞれ外部に開
口する管路２（中空部２）と、左側に位置し、その外周
面が平滑面であり、ホース８（図2参照）を外嵌するこ
とができる略円筒形の薄肉のホース嵌合部３と、右側に
位置し、外周部に雄ねじ７が形成された略円筒形の厚肉
のねじ部４と、ホース嵌合部３とねじ部４との間に位置
し該ねじ部４よりも大径の角柱形（例えば、六角形、四
角形等）のねじ締付部５とが一体形成されてなり、かつ
ホース嵌合部３の左端部近傍に、該ホース嵌合部３の直
管部よりも大径のホース抜け止め部６が形成されている
一体式の（一体成形された）コネクタボルトである。As is clear from FIG. 1, the connector bolt C thus manufactured extends in the axial direction (left and right direction) of the connector bolt, and the pipe 2 (hollow portion 2) whose left and right ends open to the outside respectively. And a substantially cylindrical thin-walled hose fitting portion 3 which is located on the left side and has a smooth outer peripheral surface to which the hose 8 (see FIG. 2) can be externally fitted, and an outer peripheral portion located on the right side. And a substantially cylindrical screw portion 4 having a male thread 7 formed thereon, and a prism (for example, hexagonal) having a diameter larger than that of the screw portion 4 and located between the hose fitting portion 3 and the screw portion 4. , A square, etc.) and a screw fastening portion 5 having a diameter larger than the straight pipe portion of the hose fitting portion 3 near the left end of the hose fitting portion 3. Is formed as an integral (integrally molded) connector bolt.
【００２７】このコネクタボルトＣの製造方法において
は、切削加工ではなく鍛造加工によりホース嵌合部３が
形成されるので、ホース嵌合部３の外周部に螺旋状のツ
ールマーク（切削疵）が発生せず、したがって外周面が
平滑面となる。このため、ホース８（図2参照）とホー
ス嵌合部３との間のシール性が大幅に高められる。ま
た、コネクタボルトＣが一体成形により製作されるの
で、その強度ないしは耐久性が大幅に高められる。つま
り、組立式のコネクタボルトに生じる接合部の割れ、剥
離、摩耗変形等が発生しない。In the method of manufacturing the connector bolt C, since the hose fitting portion 3 is formed by forging instead of cutting, a spiral tool mark (cutting flaw) is formed on the outer peripheral portion of the hose fitting portion 3. It does not occur and therefore the outer peripheral surface becomes a smooth surface. Therefore, the sealing property between the hose 8 (see FIG. 2) and the hose fitting portion 3 is greatly improved. Further, since the connector bolt C is manufactured by integral molding, its strength or durability is greatly improved. That is, cracking, peeling, abrasion deformation, and the like of the joint portion generated in the assembling type connector bolt do not occur.
【００２８】図２に示すように、このコネクタボルトＣ
は、例えば、ホース８と相手部材９に形成された流体通
路１０とを接続するために用いられる。このように、ホ
ース８と流体通路１０とをコネクタホースＣで接続する
場合、まずスパナ等の工具（図示せず）をねじ締付部５
に係合させ、該工具でコネクタボルトＣを回転させ、コ
ネクタボルトＣのねじ部４の雄ねじ７を、相手部材９の
雌ねじ１１に螺入することになる。このとき、ねじ締付
部５と相手部材９との間にワッシャ１２をはさみ込み、
コネクタボルトＣと相手部材９との間のシール性を高め
る。なお、必要がなければ、ワッシャ１２は省いてもよ
い。かくして、コネクタボルトＣが相手部材９に強固に
取り付けられる。次に、ホース８をコネクタボルトＣの
ホース嵌合部３に外嵌する。これにより、ホース８と相
手部材９の流体通路１０とが、コネクタボルトＣの管路
２を介して接続される。As shown in FIG. 2, the connector bolt C
Is used, for example, to connect the hose 8 to the fluid passage 10 formed in the mating member 9. As described above, when the hose 8 and the fluid passage 10 are connected by the connector hose C, first, a tool (not shown) such as a wrench is attached to the screw tightening portion 5.
Then, the connector bolt C is rotated by the tool, and the male screw 7 of the screw portion 4 of the connector bolt C is screwed into the female screw 11 of the mating member 9. At this time, the washer 12 is inserted between the screw tightening portion 5 and the mating member 9,
The sealing property between the connector bolt C and the mating member 9 is improved. If not necessary, the washer 12 may be omitted. Thus, the connector bolt C is firmly attached to the mating member 9. Next, the hose 8 is externally fitted to the hose fitting portion 3 of the connector bolt C. Thereby, the hose 8 and the fluid passage 10 of the mating member 9 are connected via the conduit 2 of the connector bolt C.
【００２９】なお、図３に示すように、ホース８をホー
ス嵌合部３に外嵌する際に該ホース８の位置決めを容易
にするために、ホース嵌合部３（薄肉円筒部３）の、ホ
ース８の右端部が位置すべき部位に、バルジ加工を施し
て該ホース嵌合部３（直管部）よりも大径のホース位置
決め部１３を形成してもよい。As shown in FIG. 3, in order to facilitate positioning of the hose 8 when the hose 8 is externally fitted to the hose fitting portion 3, the hose fitting portion 3 (thin cylindrical portion 3) is used. Alternatively, bulging may be performed on a portion where the right end of the hose 8 is to be located to form a hose positioning portion 13 having a diameter larger than that of the hose fitting portion 3 (straight pipe portion).
【図１】 （ａ）〜（ｄ）は、それぞれ、本発明にかか
るコネクタボルトの製造工程の途中におけるコネクタボ
ルト中間体の側面図であり、（ｅ）は完成後におけるコ
ネクタボルトの一部断面側面図である。1 (a) to 1 (d) are side views of a connector bolt intermediate during a manufacturing process of a connector bolt according to the present invention, and FIG. 1 (e) is a partial cross section of the connector bolt after completion. It is a side view.
【図２】 相手部材に取り付けられた状態における本発
明にかかるコネクタボルトの側面断面図である。FIG. 2 is a side sectional view of the connector bolt according to the present invention in a state where the connector bolt is attached to a mating member.
【図３】 ホース位置決め部を備えたコネクタボルトの
一部断面側面図である。FIG. 3 is a partial cross-sectional side view of a connector bolt provided with a hose positioning portion.
【図４】 （ａ）〜（ｃ）は、それぞれ、従来の一体式
コネクタボルトの製造工程の途中におけるコネクタボル
ト中間体の側面図であり、（ｄ）は完成後におけるコネ
クタボルトの一部断面側面図である。4 (a) to 4 (c) are side views of a connector bolt intermediate in the middle of a conventional integrated connector bolt manufacturing process, and FIG. 4 (d) is a partial cross section of the connector bolt after completion. It is a side view.
【図５】 従来の組立式コネクタボルトの一部断面側面
図である。FIG. 5 is a partial sectional side view of a conventional assembling connector bolt.
【図６】 従来の組立式コネクタボルトの一部断面側面
図である。FIG. 6 is a partially sectional side view of a conventional assembling connector bolt.
【図７】 相手部材に取り付けられた状態における図６
に示すコネクタボルトの側面断面図である。FIG. 7 shows a state in which it is attached to a mating member.
FIG. 4 is a side sectional view of the connector bolt shown in FIG.
Ｃ…コネクタボルト、１…パイプ材（コネクタボルト中
間体）、２…管路（中空部）、３…ホース嵌合部（薄肉
円筒部）、４…ねじ部（厚肉円筒部）、５…ねじ締付部
（異形部）、５ａ…屈曲部、6…ホース抜け止め部、7…
雄ねじ、８…ホース、９…相手部材、１０…流体通路、
１１…雌ねじ、１２…ワッシャ、１３…ホース位置決め
部。C: connector bolt, 1: pipe material (connector bolt intermediate), 2: pipe line (hollow portion), 3: hose fitting portion (thin cylindrical portion), 4: screw portion (thick cylindrical portion), 5: Screw tightening part (irregular part), 5a… bending part, 6… hose retaining part, 7…
Male screw, 8 ... Hose, 9 ... Companion member, 10 ... Fluid passage,
11 ... female screw, 12 ... washer, 13 ... hose positioning part.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ１６Ｌ 33/24 Ｆ１６Ｌ 33/24 (56)参考文献 特開 平７−308712（ＪＰ，Ａ) 特開 平９−250671（ＪＰ，Ａ) 特開 平４−200834（ＪＰ，Ａ) 実開 昭61−138442（ＪＰ，Ｕ) 実開 昭58−16491（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B21J 5/00 - 5/12 B21K 1/16 B21K 21/08 B21H 3/02 F16L 33/00 - 33/26 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI F16L 33/24 F16L 33/24 (56) References JP-A-7-308712 (JP, A) JP-A-9-250671 (JP) JP-A-4-200834 (JP, A) JP-A-61-138442 (JP, U) JP-A-58-16491 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB Name) B21J 5/00-5/12 B21K 1/16 B21K 21/08 B21H 3/02 F16L 33/00-33/26
Claims (6)
れぞれ外部に開口する管路と、コネクタボルト軸線方向
にみて一方の端部側に位置しホースを外嵌することがで
きる薄肉のホース嵌合部と、他方の端部側に位置し外周
部に雄ねじが形成された厚肉のねじ部と、上記ホース嵌
合部と上記ねじ部との間に位置し該ねじ部よりも大径の
ねじ締付部とが設けられているコネクタボルトの製造方
法であって、 鍛造可能な材料からなる円筒形のパイプ材に鍛造絞り加
工を施して、パイプ軸線方向にみて一方の端部側に位置
し上記ホース嵌合部をなす薄肉円筒部と、他方の端部側
に位置する厚肉円筒部とを形成し、 上記厚肉円筒部に鍛造据え込み加工を施して、上記厚肉
円筒部の、上記薄肉円筒部との境界部近傍に、該厚肉円
筒部よりも大径の上記ねじ締付部を形成し、 上記厚肉円筒部の外周部に転造加工を施して雄ねじを形
成し、上記ねじ部を形成するようにしたことを特徴とす
るコネクタボルトの製造方法。1. A conduit extending in the axial direction of a connector bolt and having both ends open to the outside, and a thin hose fitting portion which is located at one end side in the axial direction of the connector bolt and which can externally fit a hose. A thick threaded portion having an external thread formed on the outer peripheral portion and located on the other end side, and a screw having a larger diameter than the threaded portion located between the hose fitting portion and the threaded portion. A method for manufacturing a connector bolt provided with an attachment portion, wherein forging drawing is performed on a cylindrical pipe material made of a forgeable material, and the cylindrical pipe material is located at one end side as viewed in the pipe axial direction, and Forming a thin-walled cylindrical portion forming a hose fitting portion and a thick-walled cylindrical portion located on the other end side, performing forging upsetting on the thick-walled cylindrical portion, In the vicinity of the boundary with the thin-walled cylindrical part, Forming a part tightening, to form a male thread by performing rolling on an outer peripheral portion of the thick-walled cylindrical portion, the manufacturing method of the connector bolt, characterized in that so as to form the threaded portion.
加工を施して該薄肉円筒部よりも大径のホース抜け止め
部を形成するようにしたことを特徴とする請求項１に記
載のコネクタボルトの製造方法。2. The thin-walled cylindrical portion according to claim 1, wherein a bulge process is performed near a tip portion of the thin-walled cylindrical portion to form a hose retaining portion having a diameter larger than that of the thin-walled cylindrical portion. Method of manufacturing connector bolts.
とを特徴とする請求項１又は２に記載のコネクタボルト
の製造方法。3. The method according to claim 1, wherein said forging is performed by cold forging.
れぞれ外部に開口する管路と、 コネクタボルト軸線方向にみて一方の端部側に位置し、
その外周面が平滑面であり、ホースを外嵌することがで
きる略円筒形の薄肉のホース嵌合部と、 他方の端部側に位置し、外周部に雄ねじが形成された略
円筒形の厚肉のねじ部と、 上記ホース嵌合部と上記ねじ部との間に位置し、径方向
外向きに膨出する屈曲部を備えた、上記ねじ部よりも大
径の角柱形のねじ締付部とが設けられていることを特徴
とする、パイプから一体成形されたコネクタボルト。4. A pipe extending in the axial direction of the connector bolt and having both ends open to the outside, and one end side as viewed in the axial direction of the connector bolt,
A substantially cylindrical thin-walled hose fitting portion whose outer peripheral surface is a smooth surface and to which the hose can be externally fitted, and a substantially cylindrical-shaped hose having an external thread formed on the outer peripheral portion and located on the other end side. A thicker threaded portion, a prismatic screw having a bent portion located between the hose fitting portion and the threaded portion, and having a bent portion bulging radially outward and having a diameter larger than that of the threaded portion. A connector bolt integrally formed from a pipe, provided with an attachment portion.
ース嵌合部の直管部よりも大径のホース抜け止め部が形
成されていることを特徴とする請求項４に記載のコネク
タボルト。5. The hose fitting part according to claim 4, wherein a hose retaining part having a diameter larger than that of a straight pipe part of the hose fitting part is formed near a distal end part of the hose fitting part. Connector bolt.
方向の所定の部位に、該ホース嵌合部の直管部よりも大
径のホース位置決め部が形成されていることを特徴とす
る請求項４又は５に記載のコネクタボルト。6. A hose positioning portion having a larger diameter than a straight pipe portion of the hose fitting portion is formed at a predetermined portion of the hose fitting portion in the axial direction of the connector bolt. The connector bolt according to 4 or 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10313056A JP3023353B1 (en) | 1998-11-04 | 1998-11-04 | Connector bolt and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10313056A JP3023353B1 (en) | 1998-11-04 | 1998-11-04 | Connector bolt and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP3023353B1 true JP3023353B1 (en) | 2000-03-21 |
| JP2000140991A JP2000140991A (en) | 2000-05-23 |
Family
ID=18036687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10313056A Expired - Fee Related JP3023353B1 (en) | 1998-11-04 | 1998-11-04 | Connector bolt and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3023353B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111872295A (en) * | 2020-08-12 | 2020-11-03 | 苏州孚莱博精密金属科技有限公司 | Cold heading module and cold heading process for manufacturing middle bolt of engine |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100877203B1 (en) | 2008-03-04 | 2009-01-07 | (주)대일씨에프티 | Pawl shaft and of vehicle door latch assembly and method for forging the same |
| JP5468949B2 (en) * | 2010-03-23 | 2014-04-09 | 中央発條株式会社 | Control cable |
| CN103611857B (en) * | 2013-12-09 | 2015-10-28 | 河南旭原不锈钢有限公司 | A kind of Full-automatic steel pipe thread rolling machine |
| EP3345694A1 (en) | 2017-01-05 | 2018-07-11 | FELSS Systems GmbH | Method and device for locally thickening and thereby producing a hollow body |
-
1998
- 1998-11-04 JP JP10313056A patent/JP3023353B1/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111872295A (en) * | 2020-08-12 | 2020-11-03 | 苏州孚莱博精密金属科技有限公司 | Cold heading module and cold heading process for manufacturing middle bolt of engine |
| CN111872295B (en) * | 2020-08-12 | 2021-03-26 | 苏州孚莱博精密金属科技有限公司 | Cold heading module and cold heading process for manufacturing middle bolt of engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000140991A (en) | 2000-05-23 |
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