JPH09303646A - Double pipe, manufacture thereof, hose mouthpiece and manufacture thereof, and brake hose - Google Patents
Double pipe, manufacture thereof, hose mouthpiece and manufacture thereof, and brake hoseInfo
- Publication number
- JPH09303646A JPH09303646A JP8310913A JP31091396A JPH09303646A JP H09303646 A JPH09303646 A JP H09303646A JP 8310913 A JP8310913 A JP 8310913A JP 31091396 A JP31091396 A JP 31091396A JP H09303646 A JPH09303646 A JP H09303646A
- Authority
- JP
- Japan
- Prior art keywords
- nipple
- socket
- hose
- protrusion
- head
- 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.)
- Granted
Links
Landscapes
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Forging (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、内管の外周に外管
を有する二重管及びその製造方法、ニップル部の外周に
ソケット部を有するホース用口金具及びその製造方法、
並びにホース端部に口金具を取付けたブレーキホースに
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double pipe having an outer pipe on the outer periphery of an inner pipe and a method for producing the same, a mouth fitting for a hose having a socket portion on the outer periphery of a nipple, and a method for producing the same.
Also, the present invention relates to a brake hose having a mouth metal fitting attached to the end of the hose.
【０００２】[0002]
【従来の技術】工業用ホースの取付け端部には、着脱
性、漏洩防止性及び信頼性等を配慮したホース用口金具
が使用されている。このホース用口金具は、ホース側と
なる一方の軸端側にソケット部及びその内側にニップル
部が二重管状に設けられ、他方の軸端側にネジ部などを
有した頭部が設けられて構成されている。2. Description of the Related Art At a mounting end of an industrial hose, a hose fitting is used in consideration of detachability, leakage prevention and reliability. In this hose fitting, a socket part and a nipple part are provided in a double tubular shape inside the one shaft end side on the hose side, and a head part having a screw part is provided on the other shaft end side. Is configured.
【０００３】この種のホース用口金具を製造する方法と
しては、切削により各部を成形する方法、ソケット部及
び頭部を含む本体部とニップル部とを別々に製造してこ
れらをブレージングにより一体化する方法、或いは本体
部とニップル部とをカシメにより一体化する方法などが
提案されている。As a method of manufacturing this kind of hose fitting, a method of molding each part by cutting, a body part including a socket part and a head part and a nipple part are separately manufactured and integrated by brazing. There has been proposed a method of doing so, or a method of integrating the main body portion and the nipple portion by caulking.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら前記従来
の製造方法のうち、全切削による方法は、大量の切粉が
発生する上、作業速度が遅く、コスト高になるので、量
産品にはあまり適さない。また寸法安定性に欠けるとい
う難点がある。However, of the above-mentioned conventional manufacturing methods, the method based on the whole cutting method is not suitable for mass-produced products because a large amount of chips is generated, the working speed is slow, and the cost is high. Absent. In addition, there is a drawback that it lacks dimensional stability.
【０００５】ブレージングによる方法は、通常本体部を
パーツフォーマーなどの塑性加工で製造し、ニップル部
を丸棒又はパイプ材から切削により製造し、そしてニッ
プル部を本体部に圧入し、その後銅ロウなどでブレージ
ングするものである。ブレージングによる方法は、量産
性に優れているが、ニップル部の切削工程は残ることに
なる。またブレージングのための圧入、銅リング入れ、
トレーへの整列、ブレージング、ブレージング後の銅ロ
ウチェックなどの工程が必要であるので、コスト高の要
因になる。さらにブレージングによってニップル部が軟
らかくなり、ホースカシメ時においてニップルつぶれの
原因になる。そしてブレージングが適正に行われない
と、圧入接続箇所からの流体（油）洩れ発生のおそれが
あるという問題がある。In the brazing method, the body is usually manufactured by plastic working such as a part former, the nipple is manufactured by cutting a round bar or a pipe material, and the nipple is press-fitted into the body, and then copper brazing is performed. It is something that is brazed. The brazing method is excellent in mass productivity, but the nipple cutting process remains. Also press fitting for brazing, copper ring holder,
Since processes such as tray alignment, brazing, and copper brazing after brazing are required, this is a factor of high cost. Further, the nipple portion is softened by brazing, which may cause the nipple to collapse during hose crimping. If brazing is not performed properly, there is a problem that fluid (oil) may leak from the press-fitting connection portion.
【０００６】さらにカシメによる方法では、ブレージン
グによる方法よりも工程が短く、ニップルつぶれの心配
も少なく、コスト的にも問題ないと考えられている。し
かしながらカシメ部分からの流体洩れのおそれがブレー
ジングによるものよりもかなり大きいため、実際には採
用され難い技術である。Further, it is considered that the caulking method has shorter steps than the brazing method, there is less concern about crushing of the nipple, and the cost is not a problem. However, since the risk of fluid leakage from the caulked portion is considerably greater than that due to brazing, this is a technique that is difficult to actually use.
【０００７】本発明は、上記のような問題点を解決する
ためになされたものであり、ホースカシメ時におけるニ
ップルつぶれを防止でき、ニップル部と本体部との接続
をなくすことにより信頼性を向上でき、更に、製造工程
の簡略化により低廉化を実現できる二重管及びその製造
方法の提供を目的とするものである。The present invention has been made in order to solve the above-mentioned problems, and it is possible to prevent the nipple from collapsing at the time of caulking the hose and to improve the reliability by eliminating the connection between the nipple portion and the main body portion. Furthermore, it is an object of the present invention to provide a double pipe and a manufacturing method thereof, which can realize cost reduction by simplifying the manufacturing process.
【０００８】[0008]
【課題を解決するための手段】前記課題を解決すべく、
本発明の二重管は、内管と、内管の外周に設けられた外
管と、内管と外管とを一方端において連結する基部とを
有し、内管、外管及び基部とが同一材料で一体成形され
てなり、内管は外管よりも大きな硬度を有した構成を特
徴とし、その製造方法は、円柱状の突起部と、突起部の
外周に設けられた外管と、突起部と外管とを一方端にお
いて連結する基部とを有し、突起部、外管及び基部とが
同一材料で一体成形されてなる中間成形品の突起部に塑
性加工を施して内管を形成することを特徴とするもので
ある。In order to solve the above-mentioned problems,
The double pipe of the present invention has an inner pipe, an outer pipe provided on the outer periphery of the inner pipe, and a base portion that connects the inner pipe and the outer pipe at one end, and the inner pipe, the outer pipe, and the base portion. Are integrally formed of the same material, and the inner tube is characterized by having a hardness greater than that of the outer tube.The manufacturing method is a cylindrical projection and an outer tube provided on the outer periphery of the projection. An inner pipe having a base portion connecting the protrusion and the outer pipe at one end, and the protrusion, the outer pipe, and the base being integrally molded of the same material Is formed.
【０００９】また、本発明のホース用口金具は、内管形
状のニップル部と、ニップル部の外周に設けられた管状
のソケット部と、ニップル部とソケット部とを一方端に
おいて連結する頭部とを有し、ソケット部、ニップル部
及び頭部とが同一材料で一体成形されてなり、ニップル
部はソケット部よりも大きな硬度を有した構成を特徴と
し、その製造方法は、円柱状の突起部と、突起部の外周
に設けられた管状のソケット部と、突起部とソケット部
とを一方端において連結する頭部とを有し、突起部、ソ
ケット部及び頭部とが同一材料で一体成形されてなる中
間成形品の突起部に塑性加工を施して管状のソケット部
を形成することを特徴とするものである。Further, the mouth fitting for a hose of the present invention is an inner tube-shaped nipple portion, a tubular socket portion provided on the outer periphery of the nipple portion, and a head portion for connecting the nipple portion and the socket portion at one end. And a socket portion, a nipple portion, and a head are integrally formed of the same material, and the nipple portion has a hardness greater than that of the socket portion. Part, a tubular socket part provided on the outer periphery of the projection part, and a head part connecting the projection part and the socket part at one end, and the projection part, the socket part and the head part are integrally made of the same material. The present invention is characterized in that a tubular socket portion is formed by subjecting a protrusion of the molded intermediate molded product to plastic working.
【００１０】更に、本発明のブレーキホースは、管状の
ニップル部と、ニップル部の外周に設けられた管状のソ
ケット部と、ニップル部とソケット部とを一方端におい
て連結する頭部とを有し、ソケット部、ニップル部及び
頭部とが同一材料で一体成形されてなり、ニップル部は
ソケット部よりも大きな硬度を有している口金具のニッ
プル部とソケット部との間にホース端部を挿入固定して
なることを特徴とするものである。Further, the brake hose of the present invention has a tubular nipple portion, a tubular socket portion provided on the outer periphery of the nipple portion, and a head portion connecting the nipple portion and the socket portion at one end. , The socket, the nipple, and the head are integrally molded of the same material, and the nipple has a hardness greater than that of the socket.The hose end is placed between the nipple of the fitting and the socket. It is characterized by being inserted and fixed.
【００１１】[0011]
【発明の実施の形態】本発明の二重管及びホース用口金
具は、図３に示すように、内管（ニップル部）２と、外
管（ソケット部）３と、これら内管２と外管３とを一方
端において連結する基部（頭部）４とからなっており、
これら内管２、外管３及び基部４とは同一材料で一体成
形されているため、流体漏れなどのおそれがなくなって
信頼性が向上し、また、内管は外管よりも大きな硬度を
有しているため、ホースカシメ時における内管のつぶれ
等の変形を防止できる。BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 3, a double pipe and hose fitting of the present invention includes an inner pipe (nipple portion) 2, an outer pipe (socket portion) 3, and these inner pipes 2. It is composed of a base (head) 4 that connects the outer tube 3 to one end,
Since the inner tube 2, the outer tube 3 and the base portion 4 are integrally formed of the same material, there is no fear of fluid leakage and the reliability is improved, and the inner tube has a greater hardness than the outer tube. Therefore, it is possible to prevent deformation such as crushing of the inner pipe during caulking of the hose.
【００１２】また、本発明の製造方法は、図２に示すよ
うに、突起部２４、外管（ソケット部）３及び頭部２２
とが同一材料で一体成形されている中間成形品２１の突
起部２４に塑性加工を施して内管（ニップル部）２を形
成するという、塑性加工を主体としたものであり、寸法
安定性に優れ、また、製造工程を簡略化できるので、量
産性に適している。Further, in the manufacturing method of the present invention, as shown in FIG. 2, the protruding portion 24, the outer tube (socket portion) 3 and the head portion 22 are provided.
Is mainly formed by plastic working, in which the inner pipe (nipple portion) 2 is formed by subjecting the projection 24 of the intermediate molded product 21 integrally molded with the same material to plastic working. Since it is excellent and the manufacturing process can be simplified, it is suitable for mass production.
【００１３】[0013]
【実施例】図１は、本発明のホース用口金具の具体的一
実施例の説明図である。このホース用口金具１は、ニッ
プル部２と、ニップル部２の外周に設けられたソケット
部３と、ニップル部２とソケット部３を一方端において
連結する頭部４とからなり、これらニップル部２、ソケ
ット部３及び頭部４とは同一材料で一体成形されてい
る。ソケット部３と頭部４との境界位置には段状のツバ
部６が形成されている。ソケット部３は、ホース端の外
周に適宜嵌め合わされるような外径及び長さの管状に形
成されている。ニップル部２は、ソケット部３と略同じ
長さＬ１で、且つ所定の外径Φ１と内径Φ２を有した細
径パイプとして形成されている。その具体的寸法は、例
えば、Ｌ１＝１８mm、Φ１＝３．５mm、Φ２＝２．３mm
である。ニップル部２は、ツバ部６の径方向内方に形成
された軸壁７から延長して一体的に形成されている。頭
部４の径方向内方には、一端に開口した空間９が形成さ
れ、この空間９の外縁に沿ってネジ溝が螺刻されて雌ネ
ジ部５が形成されている。ニップル部２の軸穴８は、軸
壁７を貫通して頭部４に形成された空間９側に突き抜け
ている。軸壁７の空間９側には円錐台状のシール部１０
が形成され、その軸心を軸穴８が貫通している。このほ
か頭部４の外周面には溝部１１が形成されている。本発
明の口金具１は、ニップル部２とソケット部３とは同一
材料で一体成形されたものであるが、後述する通り、ニ
ップル部２はソケット部３よりも大きな硬度を有してい
ることを大きな特徴としている。FIG. 1 is an explanatory view of a specific embodiment of a hose fitting according to the present invention. The hose fitting 1 includes a nipple portion 2, a socket portion 3 provided on the outer periphery of the nipple portion 2, and a head portion 4 connecting the nipple portion 2 and the socket portion 3 at one end. 2, the socket part 3 and the head part 4 are integrally formed of the same material. A step-shaped collar 6 is formed at a boundary position between the socket 3 and the head 4. The socket portion 3 is formed in a tubular shape having an outer diameter and a length so as to be appropriately fitted to the outer periphery of the hose end. The nipple portion 2 is formed as a small-diameter pipe having a substantially same length L1 as the socket portion 3 and having a predetermined outer diameter Φ1 and inner diameter Φ2. Specific dimensions are, for example, L1 = 18 mm, Φ1 = 3.5 mm, Φ2 = 2.3 mm
It is. The nipple 2 extends from a shaft wall 7 formed radially inward of the flange 6 and is integrally formed. A space 9 opened at one end is formed radially inward of the head portion 4, and a thread groove is formed along the outer edge of the space 9 to form a female screw portion 5. The shaft hole 8 of the nipple portion 2 penetrates through the shaft wall 7 and penetrates into the space 9 formed in the head 4. On the space 9 side of the shaft wall 7, a frustoconical seal portion 10 is provided.
Is formed, and the shaft hole 8 penetrates the shaft center. In addition, a groove 11 is formed on the outer peripheral surface of the head 4. In the mouth fitting 1 of the present invention, the nipple portion 2 and the socket portion 3 are integrally formed of the same material, but as will be described later, the nipple portion 2 has a hardness higher than that of the socket portion 3. Is a major feature.
【００１４】次に、本発明のホース用口金具の製造方法
の一実施例を説明する。まず、第一成形工程として、図
２に示すように、突起部２４と、ソケット部３と基部２
２とが一体化された中間成形品（ブランク材）２１を塑
性加工にて成形する。この中間成形品２１を例えば冷間
鍛造にて成形する場合は、材料として冷間圧造用炭素鋼
線（ＳＷＣＨ１２又はＳＷＣＨ１５）か、これの相当品
を選定し、通常焼鈍処理、潤滑処理したものを用いる。
また塑性加工設備としては、多段式のパーツフォーマー
などを用いる。中間成形品２１は、円柱状の突起部２４
と、突起部２４の外周に設けられたソケット部３と、突
起部２４とソケット部３とを一方端において連結する基
部２２とを有し、突起部２４、ソケット部３及び基部２
２とは同一材料で一体成形されており、基部２２にはネ
ジ部５が形成される下穴２３が設けられている。突起部
２４は、円柱状をしており、ニップル部２と等しい体積
及び外径有し、軸壁７に相当する区画壁部分２５に一端
が連設一体化されている。突起部分２４の具体的寸法
は、例えば、外径Φ３＝３．５mm、突出長さＬ２＝１０
mmである。なお、中間成形品２１は、機械加工単独によ
り、あるいは塑性加工と機械加工の併用により製造する
ことも可能である。Next, an embodiment of the method for manufacturing the hose fitting of the present invention will be described. First, as the first molding step, as shown in FIG. 2, the protrusion 24, the socket 3 and the base 2 are formed.
An intermediate molded product (blank material) 21 integrated with 2 is molded by plastic working. When this intermediate molded product 21 is formed by, for example, cold forging, a carbon steel wire for cold heading (SWCH12 or SWCH15) or an equivalent product thereof is selected as a material, and the product which is usually annealed and lubricated is used. To use.
As the plastic working equipment, a multi-stage parts former or the like is used. The intermediate molded product 21 has a cylindrical protrusion 24.
And a base portion 22 that connects the projection portion 24 and the socket portion 3 at one end, and the socket portion 3 provided on the outer periphery of the projection portion 24.
2 is integrally formed of the same material, and the base 22 has a prepared hole 23 in which the screw portion 5 is formed. The protrusion 24 has a columnar shape, has the same volume and outer diameter as the nipple portion 2, and has one end continuously connected to a partition wall portion 25 corresponding to the shaft wall 7. Specific dimensions of the protruding portion 24 are, for example, an outer diameter Φ3 = 3.5 mm and a protruding length L2 = 10.
mm. The intermediate molded product 21 can also be manufactured by mechanical processing alone or by using both plastic processing and mechanical processing.
【００１５】なお、中間成形品２１は、機械加工単独に
より、あるいは塑性加工と機械加工を組合せて製造する
こともできる。The intermediate molded product 21 can be manufactured by machining alone or by combining plastic working and machining.
【００１６】第一成形工程を経た所定形状の中間成形品
２１には、次いで焼鈍を施すことが好ましい。これは後
工程である第二成形工程での塑性加工を容易にするため
のものであり、焼鈍条件を調整することにより、突起部
分をできるだけ軟らかくする。その焼鈍条件としては、
例えば、８８０℃〜９００℃で約２時間加熱した後、７
時間以上かけて炉中で徐冷し、例えばロックウェルＢス
ケール６０以下の硬度となるようにする。また、焼鈍処
理と合わせて潤滑処理を施すようにしてもよい。It is preferable that the intermediate molded product 21 having a predetermined shape that has undergone the first molding process is then annealed. This is for facilitating the plastic working in the second forming step which is a post-step, and the annealing condition is adjusted to make the protruding portion as soft as possible. The annealing conditions include:
For example, after heating at 880 ° C to 900 ° C for about 2 hours,
It is gradually cooled in a furnace over a period of time so that the hardness becomes, for example, Rockwell B scale 60 or less. Moreover, you may make it lubricate with an annealing process.
【００１７】焼鈍工程の次に、第二成形工程として突起
部２４をさらに塑性加工してニップル部２の成形を行
う。成形に際しては、図４に示すように、ソケット部３
の内側に挿入される筒状のガイド４２ａと、ガイドホル
ダ４２と、ガイドホルダ４２内に設けられた超硬円柱体
であるパンチ４３とで構成されているニップル成形装置
４１が使用される。パンチ４３の外径は、軸穴７の径Φ
２に等しくなるように形成されている。ガイドホルダ４
２は、パンチ４３を保持するためのホールド穴４４と、
突起部分２４の外径に等しい内径のガイド穴４５とを有
している。After the annealing step, as a second forming step, the protruding portion 24 is further plastically worked to form the nipple portion 2. At the time of molding, as shown in FIG.
A nipple forming device 41 is used which is composed of a cylindrical guide 42a to be inserted inside, a guide holder 42, and a punch 43 which is a super hard cylindrical body provided in the guide holder 42. The outer diameter of the punch 43 is the diameter Φ of the shaft hole 7.
It is formed to be equal to 2. Guide holder 4
2 is a hold hole 44 for holding the punch 43,
It has a guide hole 45 having an inner diameter equal to the outer diameter of the protruding portion 24.
【００１８】塑性加工に際しては、ニップル成形装置４
１をダイス金型（図示せず）と同軸にセットして、ガイ
ドホルダ４２及びパンチ４３を油圧プレスにより前進さ
せる。そして突起部分２４の変形力が例えば２０Ｔｏｎ
／cm2 であれば、１Ｔｏｎ程度の押込み力でパンチ４３
を突起部分２４に圧入させる。この圧入により、突起部
分２４の中にパンチ４３と同径の軸穴８が成形されると
共に、押し退けた分をパンチ４３の外周壁とガイドホル
ダ４２のガイド穴４５の内壁との間に沿って後方へ押出
す。すなわち、ガイドホルダ４２を容器とする後方押出
しにより、ニップル部３を塑性加工により成形すること
ができる。この圧入は、二段階など数次に亘って行うよ
うにしてもよい。また、パンチ４３が軸心に沿って真っ
直ぐに押し込まれなければ破損のおそれが生じるので、
突起部分２４の先端面２４ａは軸心と直角な平坦面とす
るのが好ましい。At the time of plastic working, the nipple forming device 4
1 is set coaxially with a die die (not shown), and the guide holder 42 and punch 43 are moved forward by a hydraulic press. Then, the deformation force of the protruding portion 24 is, for example, 20 Ton
If it is / cm 2 , the punching force is 43 with a pushing force of about 1 Ton.
Are press-fitted into the protruding portion 24. By this press-fitting, the shaft hole 8 having the same diameter as that of the punch 43 is formed in the protruding portion 24, and the pushed-out portion is provided along the outer peripheral wall of the punch 43 and the inner wall of the guide hole 45 of the guide holder 42. Push backwards. That is, the nipple portion 3 can be formed by plastic working by backward extrusion using the guide holder 42 as a container. This press-fitting may be performed in several steps such as two steps. Also, if the punch 43 is not pushed straight along the axis, damage may occur.
It is preferable that the tip end surface 24a of the protruding portion 24 is a flat surface perpendicular to the axis.
【００１９】ニップル部２の成形に引き続いて打抜きに
より軸穴８を下穴２３の底面まで貫通させる。この打抜
きは別のプレス装置で行ってもよいが、パンチ４３をガ
イドホルダ４２に対して進退自在に構成し、後方押出に
引き続いて打抜きを行ってもよい。また、この成形と並
行してシール部１０を成形することが好ましく、例えば
ダイスに所定形状の型を形成しておけば、打抜きと同時
にシール部１０を成形することができる。また、基部２
２に対して型鋳造又は打抜きなどを行うことによりツバ
部６を成形する。このようにして、図３に示すような形
状の口金具（機械加工前の中間品）が得られる。Following the molding of the nipple portion 2, the shaft hole 8 is penetrated to the bottom surface of the prepared hole 23 by punching. This punching may be performed by another press device, but the punch 43 may be configured to be movable back and forth with respect to the guide holder 42, and the punching may be performed subsequent to the backward extrusion. Further, it is preferable to mold the seal portion 10 in parallel with this molding. For example, if a die having a predetermined shape is formed in the die, the seal portion 10 can be molded simultaneously with punching. Also, the base 2
The brim portion 6 is formed by performing die casting, punching, or the like on 2. In this way, a mouth metal fitting (intermediate product before machining) having a shape as shown in FIG. 3 is obtained.
【００２０】次に機械加工工程として、例えばＮＣＩ工
作機や自動盤などを用いて、ネジ部５及び溝部１１の成
形を行う。図５に示すように、ネジ部５は、下穴２３に
対して転造タップ（図示せず）により所定のネジ長Ｌ４
（例えば約１０mm）及び内径Φ４（例えば約９mm）とな
るように成形する。また、塑性加工により成形したシー
ル部１０を、所定の円錐角度θ（例えば８４度）となる
ように、また、底面の端面２３ａが軸穴７よりも適宜大
きな径Φ５（例えば７．５mm）となるように仕上げ加工
を行う。なお、シール部１０を塑性加工でではなく、こ
の機械加工工程で成形してもよい。これで図１に示した
ように、所定の形状のホース用口金具１が得られる。Next, as a machining step, the screw portion 5 and the groove portion 11 are formed by using, for example, an NCI machine tool or an automatic lathe. As shown in FIG. 5, the threaded portion 5 has a predetermined thread length L4 with respect to the pilot hole 23 by a rolling tap (not shown).
(For example, about 10 mm) and the inner diameter Φ4 (for example, about 9 mm). In addition, the seal portion 10 formed by plastic working has a predetermined conical angle θ (for example, 84 degrees), and the end face 23a of the bottom surface has a diameter Φ5 (for example, 7.5 mm) that is appropriately larger than the shaft hole 7. Finish processing so that. It should be noted that the seal portion 10 may be formed by this machining process instead of plastic working. With this, as shown in FIG. 1, the mouth metal fitting 1 for a hose having a predetermined shape is obtained.
【００２１】このように、本発明の製造方法は、頭部４
及びソケット部３の冷間鍛造加工技術と、ニップル部２
の冷間鍛造加工技術を最適に組み合わせ、塑性加工を主
とした成形方法にしたので、寸法安定性に優れ、製造工
程を短くでき、量産性に適した方法とすることができ
る。また、切削工程がネジ部５の成形などの一部に限ら
れるので、切粉発生を最小限のものに抑えることができ
る。As described above, the manufacturing method of the present invention uses the head 4
And cold forging technology of socket 3 and nipple 2
Since the cold forging technology of (1) is optimally combined and the forming method is mainly based on plastic working, the method has excellent dimensional stability, the manufacturing process can be shortened, and the method is suitable for mass production. Further, since the cutting process is limited to a part such as molding of the screw portion 5, the generation of cutting chips can be suppressed to the minimum.
【００２２】そして重要なことは、ニップル部２は、後
方押出しの塑性加工を経ることで、例えばロックウェル
B スケールで９０〜９５と硬くなるので、ホースをカシ
メる際につぶれるおそれがない。また、ニップル部２の
加工前に焼鈍工程を経ることで、ソケット部３も軟らか
くなっており（ロックウェルB スケールで５５〜６
０）、ホースに対して容易に取り付けることができる。
そして製造されたホース用口金具１は一体構造であり、
高油圧ホースに採用しても油漏れの発生するおそれはな
い。It is important to note that the nipple portion 2 undergoes backward extrusion plastic working, for example, Rockwell.
Since it is as hard as 90 to 95 on the B scale, there is no risk of it being crushed when crimping the hose. In addition, the socket portion 3 is also softened by undergoing an annealing process before processing the nipple portion 2 (55 to 6 on the Rockwell B scale).
0), can be easily attached to the hose.
And the manufactured hose fitting 1 has an integral structure,
There is no risk of oil leakage even if used in high hydraulic hoses.
【００２３】上記の実施例においては、ニップル成形の
後方押出に係るパンチ径（Φ２）と成長径（Ｌ１）との
比は約８程度となり、通常の後方押出に適用される比率
（５〜６）を越えるものとなる。従って、これを実現す
るため、高精度の油圧プレス、高精度の金型、パンチ材
質の超硬性などを十分に備えるようにすることは当然で
ある。また、製造する部品として、ホース用口金具を示
したが、本発明はこれに限るものではなく、同様の二重
管を備えた部品に対して広く適用されるものである。In the above embodiment, the ratio of the punch diameter (Φ2) and the growth diameter (L1) in the backward extrusion of the nipple molding is about 8, which is the ratio (5 to 6) applied to the ordinary backward extrusion. ) Will be exceeded. Therefore, in order to realize this, it is of course necessary to sufficiently provide a high-precision hydraulic press, a high-precision die, and a punch material having superhardness. Further, although the hose mouth fitting has been shown as a component to be manufactured, the present invention is not limited to this, and is widely applied to a component having a similar double pipe.
【００２４】本発明によるホース用口金具は、コスト、
寸法安定性、切粉処理性、量産性、工程数、ニップル強
度、シール性等あらゆる面において従来のホース口金具
を上回る優れた効果を奏する。The hose fitting according to the present invention is
It has superior effects over conventional hose fittings in all aspects such as dimensional stability, chip disposability, mass productivity, number of processes, nipple strength, and sealability.
【００２５】上記実施例ではネジ部としてメスネジを有
したもの（メス口金具）を示したが、本発明はこれに限
るものではなく、メガネ金具など、同様のニップル部を
有した口金具に広く適用されるものである。In the above-mentioned embodiment, the one having the female screw as the screw portion (female mouth metal fitting) is shown, but the present invention is not limited to this, and it is widely applied to a mouth metal fitting having a similar nipple portion such as eyeglass metal fittings. It is applied.
【００２６】図６は、本発明の口金具をホース端部にか
しめ固定してブレーキホースとした一例を示したもので
ある。ホース５０の両端を口金具１のニップル部２とソ
ケット部３の間に挿入し、ソケット部２の複数箇所を圧
縮成形してかしめ部５１を形成して構成されている。FIG. 6 shows an example of a brake hose in which the mouth fitting of the present invention is caulked and fixed to the end of the hose. Both ends of the hose 50 are inserted between the nipple portion 2 of the mouthpiece 1 and the socket portion 3, and a plurality of portions of the socket portion 2 are compression-molded to form the caulked portion 51.
【００２７】[0027]
【発明の効果】以上説明してきた通り、本発明によれ
ば、ニップル部のつぶれ防止、コスト低減、寸法安定
性、切粉処理軽減、工程短縮、量産性向上、流体漏れ防
止等が達成されるという優れた効果が発揮される。As described above, according to the present invention, the prevention of crushing of the nipple portion, the cost reduction, the dimensional stability, the reduction of the chip processing, the process shortening, the mass productivity improvement, the fluid leakage prevention and the like are achieved. That is an excellent effect.
【図１】本発明のホース用口金具の具体的一実施例の側
断面説明図である。FIG. 1 is a side sectional explanatory view of a specific example of a hose fitting of the present invention.
【図２】本発明において使用される中間成形品の一実施
例の側断面説明図である。FIG. 2 is a side sectional explanatory view of an example of an intermediate molded product used in the present invention.
【図３】本発明の二重管及びホース用中間金具一実施例
の側断面説明図である。FIG. 3 is a side cross-sectional explanatory view of an embodiment of an intermediate fitting for double pipe and hose of the present invention.
【図４】後方押出による塑性加工方法の一実施例の側断
面説明図である。FIG. 4 is a side cross-sectional explanatory view of an embodiment of a plastic working method by backward extrusion.
【図５】頭部の加工方法の一実施例の側断面説明図であ
る。FIG. 5 is a side cross-sectional explanatory view of an example of a method of processing a head.
【図６】本発明のブレーキホースの一実施例の側断面説
明図である。FIG. 6 is a side sectional explanatory view of an embodiment of the brake hose of the present invention.
１ ホース用口金具 ２ ニップル部（内管） ３ ソケット部（外管） ４ 頭部 ５ ネジ部 ６ ツバ部 ７ 軸壁 ８ 軸穴 ９ 空間 １０ シール部 ２１ 中間成形品 ２２ 基部 ２４ 突起部 ５０ ホース DESCRIPTION OF SYMBOLS 1 Hose fitting 2 Nipple part (inner pipe) 3 Socket part (outer pipe) 4 Head part 5 Screw part 6 Flange part 7 Shaft wall 8 Shaft hole 9 Space 10 Seal part 21 Intermediate molded product 22 Base part 24 Projection part 50 Hose
───────────────────────────────────────────────────── フロントページの続き (72)発明者 滑川 義裕 茨城県日立市助川町３丁目１番１号 日立 電線株式会社電線工場内 (72)発明者 金丸 尚信 茨城県ひたちなか市大字高場2520番地 株 式会社日立製作所自動車機器事業部内 (72)発明者 村上 碩哉 東京都千代田区神田駿河台四丁目６番地 株式会社日立製作所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Namerikawa 3-1-1 Sukegawa-cho, Hitachi City, Ibaraki Hitachi Cable Company Ltd. (72) Inventor Naofunobu Kanemaru 2520 Takaba, Hitachinaka City, Ibaraki Prefecture Shares Ceremony Company Hitachi, Ltd. Automotive Equipment Division (72) Inventor Sayaya Murakami 4-6, Surugadai Kanda, Chiyoda-ku, Tokyo Inside Hitachi, Ltd.
Claims (16)
内管と外管とを一方端において連結する基部とを有し、
内管、外管及び基部とが同一材料で一体成形されてな
り、内管は外管よりも大きな硬度を有していることを特
徴とする二重管。1. An inner pipe, and an outer pipe provided on the outer periphery of the inner pipe,
A base portion that connects the inner pipe and the outer pipe at one end,
A double pipe characterized in that the inner pipe, the outer pipe and the base are integrally formed of the same material, and the inner pipe has a hardness higher than that of the outer pipe.
れた外管と、突起部と外管とを一方端において連結する
基部とを有し、突起部、外管及び基部とが同一材料で一
体成形されてなる中間成形品の突起部に塑性加工を施し
て内管を形成することを特徴とする二重管の製造方法。2. A columnar projection, an outer tube provided on the outer periphery of the projection, and a base connecting the projection and the outer tube at one end, and the projection, the outer tube and the base. A method for manufacturing a double pipe, wherein the inner pipe is formed by subjecting a projection of an intermediate molded product formed by integrally molding the same material to a plastic work.
性加工を施して内管を形成する請求項２記載の二重管の
製造方法。3. The method for producing a double pipe according to claim 2, wherein the intermediate molded product is annealed and then the projection is plastically worked to form the inner pipe.
加工を施すことなく突起部に塑性加工を施して内管を形
成する請求項３記載の二重管の製造方法。4. The method for producing a double pipe according to claim 3, wherein the inner pipe is formed by subjecting the intermediate molded product to annealing and then subjecting the projection to plastic working without subjecting the outer pipe to plastic working.
内管を形成する請求項２、請求項３又は請求項４記載の
二重管の製造方法。5. The method for producing a double pipe according to claim 2, 3, or 4, wherein the projection is plastically worked by rearward extrusion to form the inner pipe.
れた外管と、突起部と外管とを一方端において連結する
基部とを有し、突起部、外管及び基部とが同一材料で一
体成形されてなる中間成形品を成形する第一の塑性加工
を施し、次いで突起部を加工して円筒を形成する第二の
塑性加工を施すことを特徴とする二重管の製造方法。6. A columnar protrusion, an outer tube provided on the outer periphery of the protrusion, and a base connecting the protrusion and the outer tube at one end. Of the double pipe characterized by performing a first plastic working to form an intermediate molded product formed by integrally molding the same material, and then performing a second plastic working to form a cylinder by processing the protrusion. Production method.
二の塑性加工を施して内管を形成する請求項６記載の二
重管の製造方法。7. The method for producing a double pipe according to claim 6, wherein annealing is performed after the first plastic working and then second plastic working is performed to form the inner pipe.
設けられた管状のソケット部と、ニップル部とソケット
部とを一方端において連結する頭部とを有し、ソケット
部、ニップル部及び頭部とが同一材料で一体成形されて
なり、ニップル部はソケット部よりも大きな硬度を有し
ていることを特徴とするホース用口金具。8. A socket having a tubular nipple portion, a tubular socket portion provided on the outer periphery of the nipple portion, and a head portion connecting the nipple portion and the socket portion at one end thereof. A mouth fitting for a hose, characterized in that the head part is integrally formed of the same material, and the nipple part has hardness higher than that of the socket part.
れた管状のソケット部と、突起部とソケット部とを一方
端において連結する頭部とを有し、突起部、ソケット部
及び頭部とが同一材料で一体成形されてなる中間成形品
の突起部に塑性加工を施して管状のニップル部を形成す
ることを特徴とするホース用口金具の製造方法。9. A protrusion and a socket having a columnar protrusion, a tubular socket provided on the outer periphery of the protrusion, and a head connecting the protrusion and the socket at one end. A method for manufacturing a mouth fitting for a hose, characterized in that a tubular nipple portion is formed by subjecting a protrusion of an intermediate molded product integrally formed with the same material to the head to plastic working.
塑性加工を施してニップル部を形成する請求項９記載の
ホース用口金具の製造方法。10. The method of manufacturing a hose fitting according to claim 9, wherein the intermediate molded product is annealed and then the protrusion is plastically worked to form the nipple.
部に塑性加工を施すことなく突起部に塑性加工を施して
ニップル部を形成する請求項１０記載のホース用口金具
の製造方法。11. The method for producing a hose fitting according to claim 10, wherein the intermediate molded product is annealed, and then the nipple is formed by subjecting the protrusion to plastic working without subjecting the socket to plastic working.
てニップル部を形成する請求項９、請求項１０又は請求
項１１記載のホース用口金具の製造方法。12. The method of manufacturing a mouth fitting for a hose according to claim 9, 10 or 11, wherein the protrusion is plastically worked by rearward extrusion to form a nipple portion.
られた管状のソケット部と、突起部とソケット部とを一
方端において連結する頭部とを有し、突起部、ソケット
部及び頭部とが同一材料で一体成形されてなる中間成形
品を成形する第一の塑性加工を施してから、突起部を加
工して円筒形状のニップル部を形成する第二の塑性加工
を施すことを特徴とするホース用口金具の製造方法。13. A projecting portion, a socket portion, comprising: a cylindrical projecting portion; a tubular socket portion provided on the outer periphery of the projecting portion; and a head portion connecting the projecting portion and the socket portion at one end. The first plastic working is performed to form an intermediate molded product in which the head and the head are integrally formed of the same material, and then the second plastic working is performed to form the cylindrical nipple by processing the protrusion. A method of manufacturing a mouth metal fitting for a hose, which is characterized in that
する加工を含むものである請求項１３記載のホース用口
金具の製造方法。14. The method for manufacturing a hose fitting according to claim 13, wherein the second plastic working includes working for forming a brim portion on the head.
部にネジ部を形成する請求項１３記載のホース用口金具
の製造方法。15. The method for manufacturing a hose fitting according to claim 13, wherein the threaded portion is formed on the head portion by machining after the second plastic working.
に設けられた管状のソケット部と、ニップル部とソケッ
ト部とを一方端において連結する頭部とを有し、ソケッ
ト部、ニップル部及び頭部とが同一材料で一体成形され
てなり、ニップル部はソケット部よりも大きな硬度を有
している口金具のニップル部とソケット部との間にホー
ス端部が挿入固定されてなることを特徴とするブレーキ
ホース。16. A socket having a tubular nipple portion, a tubular socket portion provided on the outer periphery of the nipple portion, and a head portion connecting the nipple portion and the socket portion at one end thereof. The head part is integrally molded with the same material, and the nipple part has a hardness greater than that of the socket part.The hose end is inserted and fixed between the nipple part of the fitting and the socket part. A characteristic brake hose.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08310913A JP3121549B2 (en) | 1996-03-13 | 1996-11-21 | Manufacturing method of hose fittings |
| US08/816,216 US6189199B1 (en) | 1996-03-13 | 1997-03-12 | Method of manufacturing a hose coupling from an intermediate blank material |
| MX9701887A MX9701887A (en) | 1996-03-13 | 1997-03-12 | Hose coupling intermediates. |
| IT97MI000557A IT1290064B1 (it) | 1996-03-13 | 1997-03-13 | Giunto per tubo flessibile pezzo grezzo intermedio per realizzarlo e insieme di tubo flessibile che utilizza detto giunto |
| GB9705235A GB2311111B (en) | 1996-03-13 | 1997-03-13 | A method of maufacturing a hose coupling |
| CN97110256A CN1087411C (en) | 1996-03-13 | 1997-03-13 | Hose coupling, intermediate blank materiul for making the same, and hose assembly using the same |
| DE19710261A DE19710261B4 (en) | 1996-03-13 | 1997-03-13 | Method of making a hose coupling |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5632196 | 1996-03-13 | ||
| JP8-56322 | 1996-03-13 | ||
| JP8-56321 | 1996-03-13 | ||
| JP5632296 | 1996-03-13 | ||
| JP08310913A JP3121549B2 (en) | 1996-03-13 | 1996-11-21 | Manufacturing method of hose fittings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09303646A true JPH09303646A (en) | 1997-11-28 |
| JP3121549B2 JP3121549B2 (en) | 2001-01-09 |
Family
ID=27295884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08310913A Expired - Fee Related JP3121549B2 (en) | 1996-03-13 | 1996-11-21 | Manufacturing method of hose fittings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3121549B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6151777A (en) * | 1997-10-14 | 2000-11-28 | Okawa Screw Manufacturing Co., Ltd. | Method of manufacturing a blank raw material for a hose end fitting |
| WO2013105792A1 (en) * | 2012-01-11 | 2013-07-18 | 주식회사 경동나비엔 | Intake air collar and exhaust collar for combustion device |
| KR101355043B1 (en) * | 2010-07-22 | 2014-02-04 | 나고야 기켄 고교 가부시키가이샤 | Method of manufacturing mouthpiece for hose |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4764951B1 (en) * | 2010-07-22 | 2011-09-07 | 名古屋技研工業株式会社 | Method for manufacturing hose fittings |
-
1996
- 1996-11-21 JP JP08310913A patent/JP3121549B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6151777A (en) * | 1997-10-14 | 2000-11-28 | Okawa Screw Manufacturing Co., Ltd. | Method of manufacturing a blank raw material for a hose end fitting |
| KR101355043B1 (en) * | 2010-07-22 | 2014-02-04 | 나고야 기켄 고교 가부시키가이샤 | Method of manufacturing mouthpiece for hose |
| WO2013105792A1 (en) * | 2012-01-11 | 2013-07-18 | 주식회사 경동나비엔 | Intake air collar and exhaust collar for combustion device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3121549B2 (en) | 2001-01-09 |
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