JP2732310B2 - Manufacturing method of Ω-shaped bellows tube - Google Patents

Manufacturing method of Ω-shaped bellows tube

Info

Publication number
JP2732310B2
JP2732310B2 JP27551989A JP27551989A JP2732310B2 JP 2732310 B2 JP2732310 B2 JP 2732310B2 JP 27551989 A JP27551989 A JP 27551989A JP 27551989 A JP27551989 A JP 27551989A JP 2732310 B2 JP2732310 B2 JP 2732310B2
Authority
JP
Japan
Prior art keywords
tube
shaped
bead
chuck
axis
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
Application number
JP27551989A
Other languages
Japanese (ja)
Other versions
JPH03138024A (en
Inventor
一儀 滝川
勝志 鷲巣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Usui Kokusai Sangyo Kaisha Ltd
Original Assignee
Usui Kokusai Sangyo Kaisha Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Usui Kokusai Sangyo Kaisha Ltd filed Critical Usui Kokusai Sangyo Kaisha Ltd
Priority to JP27551989A priority Critical patent/JP2732310B2/en
Publication of JPH03138024A publication Critical patent/JPH03138024A/en
Application granted granted Critical
Publication of JP2732310B2 publication Critical patent/JP2732310B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明はΩ形蛇腹管の製造法に係り、特に金属管の外
周にΩ形断面のビードを有するΩ形蛇腹管の製造法に関
する。
Description: TECHNICAL FIELD The present invention relates to a method for manufacturing an Ω-shaped bellows tube, and more particularly to a method for manufacturing an Ω-shaped bellows tube having a bead having an Ω-shaped cross section on the outer periphery of a metal tube.

(従来の技術) 金属管の外周にビードを有する蛇腹管は、振動を吸収
し且つ耐圧性に優れているので、振動の多い自動車の排
気管、船舶のエンジン廻りの配管或いは空調関係のポン
プ、コンプレッサの配管などに使用されている。
(Conventional technology) A bellows tube having a bead on the outer periphery of a metal tube absorbs vibration and has excellent pressure resistance, so that the exhaust pipe of an automobile having a lot of vibration, piping around an engine of a ship, or a pump for air conditioning, Used for compressor piping.

蛇腹管の製造としては、管の外周を所定形状の外型で
包み、管内圧力を高めて管壁を外型内に膨出させるバル
ジ加工が使用されている。この種のバルジ加工で管壁に
形成される断面が山形のビードは、山頂部が肉薄となり
且つ冷間加工で脆くなって亀裂を生じ易いという欠点が
ある。
In manufacturing a bellows tube, a bulge process is used in which the outer periphery of the tube is wrapped in an outer mold having a predetermined shape, and the pressure inside the tube is increased to bulge the tube wall into the outer mold. A bead having a mountain-shaped cross section formed on a pipe wall by this type of bulge processing has a drawback that a top portion is thinner and becomes brittle by cold working, so that a crack is easily generated.

一方蛇腹管においては、管壁に形成されるビードをΩ
形断面にすると、屈折、衝撃或いは繰返し荷重に強くな
ることが理論的に知られている。
On the other hand, in the bellows tube, the beads formed on the tube wall
It is theoretically known that a shaped cross section is resistant to refraction, impact or repeated load.

これらを配慮して、特開昭63−43729号公報におい
て、管壁に断面Ω形のビードを形成する管のΩ形ビーデ
ィング加工法が提案されている。
In view of the above, Japanese Patent Application Laid-Open No. 63-43729 proposes an Ω-shaped beading method for a tube in which a Ω-shaped bead is formed on a tube wall.

第3図(a)〜(c)は、この提案に係る管のΩ形ビ
ーディング加工法の説明図で第3図(a)に示すよう
に、管壁に局部的内圧Pを加えて山形断面の膨出部1を
形成した管体2に対して、膨出部1を軸心方向で挾むよ
うに押型3,4を配設する。この状態から押型3に対して
押型4を近ずけるように移動し、同図(b)の過程を経
て最終的には同図(c)に示すように押型3,4を互いに
対接させて、管壁にΩ形断面のΩ形ビード5を形成す
る。
FIGS. 3 (a) to 3 (c) are explanatory views of the Ω-shaped beading processing method for a pipe according to this proposal, and as shown in FIG. 3 (a), a local internal pressure P is applied to the pipe wall to form a chevron. With respect to the tubular body 2 having the bulging portion 1 having a cross section, the pressing dies 3 and 4 are disposed so as to sandwich the bulging portion 1 in the axial direction. From this state, the pressing die 4 is moved so as to approach the pressing die 3, and the pressing die 3, 4 is finally brought into contact with each other as shown in FIG. Then, an Ω-shaped bead 5 having an Ω-shaped cross section is formed on the tube wall.

(発明が解決しようとする課題) 前述した提案に係る管のΩ形ビーディング加工法で
は、管の軸心方向に押型が配列されるので、管に対して
複数のΩ形ビードを形成後に、ビード間に位置している
押型を、前記軸心の半径方向に引き抜く必要がある。
(Problems to be Solved by the Invention) In the Ω-beading method for a pipe according to the above-mentioned proposal, since the pressing dies are arranged in the axial direction of the pipe, after forming a plurality of Ω-beads on the pipe, It is necessary to pull out the pressing die located between the beads in the radial direction of the axis.

この押型の引き抜きに際して、押型が成形されたビー
ドと干渉して管に傷を付けたり、管を変形させることが
多い。
When the pressing die is pulled out, the pressing die often interferes with the formed beads to damage or deform the tube.

本発明は、前述したようなΩ形蛇腹管の製造現状に鑑
みてなされたものであり、その目的は管に傷を付けたり
管を変形させたりすることなく、Ω形蛇腹管を効率的に
製造することが出来るΩ形蛇腹管の製造法を提供するこ
とにある。
The present invention has been made in view of the current state of manufacture of the Ω-shaped bellows tube as described above, and has an object to efficiently convert the Ω-shaped bellows tube without damaging or deforming the tube. An object of the present invention is to provide a method for manufacturing an Ω-shaped bellows tube that can be manufactured.

(課題を解決するための手段) 前記目的を達成するために、本発明は管の外周に所定
高さの膨出ビードを形成し、先端に可撓性ゴム材が取り
付けられ、前記管の軸心の廻りに複数個に分割されたチ
ャック型片を、前記膨出ビードの谷部に挿入すると共
に、該谷部の底部を管内より支持し、前記複数のチャッ
ク型片を前記軸心の廻りに合体させることにより、前記
可撓性ゴム材と合体された前記チャック型片とで前記管
をΩ状に膨出させ、その後前記チャック型片を前記軸心
の半径方向に引き抜くことにより、前記管からΩ形ビー
ドを有するΩ形蛇腹管を製造するように構成されてい
る。
(Means for Solving the Problems) In order to achieve the above object, the present invention forms a bulging bead of a predetermined height on the outer periphery of a tube, a flexible rubber material is attached to a tip, and a shaft of the tube is provided. The chuck mold pieces divided into a plurality around the core are inserted into the valleys of the bulging bead, and the bottoms of the valleys are supported from inside the pipe, and the plurality of chuck mold pieces are rotated around the axis. By inflating the tube with the flexible rubber material and the chuck mold piece united with the flexible rubber material, the tube is expanded in an Ω shape, and then the chuck mold piece is pulled out in the radial direction of the axial center. It is configured to produce an Ω-shaped bellows tube having an Ω-shaped bead from the tube.

(作 用) 本発明では、先端に可撓性ゴム材が取り付けられ、管
の軸心の廻りに複数個に分割されたチャック型片を、膨
出ビードが形成された管の膨出ビードの谷部に挿入す
る。そして、複数個のチャック型片を軸心の廻りに合体
させることにより、可撓性ゴム材と合体されたチャック
型片とで、管をΩ状に膨出させる。
(Operation) In the present invention, a flexible rubber material is attached to the tip, and a plurality of chuck mold pieces divided around the axis of the pipe are used to form the expanded bead of the pipe in which the expanded bead is formed. Insert into the valley. Then, by joining the plurality of chuck mold pieces around the axis, the tube is expanded in an Ω shape with the flexible rubber material and the combined chuck mold pieces.

管にΩ状ビード形成後、チャック型片は、管を傷付け
たり或いは変形させることなく軸心の半径方向に引き抜
かれる。
After forming the Ω-shaped bead in the tube, the chuck mold is withdrawn radially of the axis without damaging or deforming the tube.

このようにして、管にΩ状ビードを次々と形成しΩ形
蛇腹管が製造される。
In this manner, the Ω-shaped beads are formed on the tube one after another, and the Ω-shaped bellows tube is manufactured.

(実施例) 以下、本発明の実施例を第1図及び第2図(a)〜
(c)を参照して説明する。
(Example) Hereinafter, an example of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

ここで第1図は、実施例に使用するチャック型片の説
明図で、このチャック型片7は管の軸心6の廻りに複数
のチャック型片7a〜7dに分割されている。各チャック型
片a〜7dの先端には、可撓性ゴム材8a〜8dが取り付けら
れ、各チャック型片7a〜7dの両面には、断面Ω状の半型
12がそれぞれ形成されている。
FIG. 1 is an explanatory view of a chuck mold piece used in the embodiment. The chuck mold piece 7 is divided into a plurality of chuck mold pieces 7a to 7d around an axis 6 of a pipe. Flexible rubber materials 8a to 8d are attached to the tips of the chuck mold pieces a to 7d, and both sides of each of the chuck mold pieces 7a to 7d
12 are formed respectively.

第2図(a)に示すように、管内から管壁に局部的内
圧を印加する公知のバジル加工或いは波付け加工によっ
て管壁に断面山形の所定高さの膨出ビード9が形成され
た管体10に、芯金11を挿通し芯金11の外周が膨出ビード
9の谷部9aの底部に対接する状態とする。この状態から
軸心6の廻りに分割されたチャック型片7a〜7dを配し
(第2図ではチャック型片7aのみが図示されている)、
チャック型片7a〜7dを膨出ビード9の谷部9a内に挿入す
る。
As shown in FIG. 2 (a), a tube in which a bulged bead 9 having a mountain-shaped cross section and a predetermined height is formed on the tube wall by a known basil process or a corrugation process for applying a local internal pressure to the tube wall from inside the tube. The core 10 is inserted into the body 10 so that the outer periphery of the core 11 is in contact with the bottom of the valley 9 a of the bulging bead 9. From this state, chuck mold pieces 7a to 7d divided around the axis 6 are arranged (only the chuck mold pieces 7a are shown in FIG. 2).
The chuck mold pieces 7 a to 7 d are inserted into the valleys 9 a of the bulging bead 9.

第2図(b)は、チャック型片7aが谷部9a内に挿入さ
れた状態を示すもので、チャック型片7aの可撓性ゴム材
8aは、谷部9aの管体10の表面に沿って変形している。同
図(b)ではチャック型片7aのみが示されているが、実
際には、軸心6の廻りにチャック型片7a〜7dが同一状態
で集合している。
FIG. 2 (b) shows a state in which the chuck mold piece 7a is inserted into the valley 9a, and the flexible rubber material of the chuck mold piece 7a is shown.
8a is deformed along the surface of the tubular body 10 in the valley 9a. Although only the chuck mold pieces 7a are shown in FIG. 2B, in actuality, the chuck mold pieces 7a to 7d are assembled around the axis 6 in the same state.

この状態から第2図(c)に示すように、チャック型
片7a〜7dを芯金11により支持された管体10に押し付ける
と共に、管体10を一端又は両端から軸心方向に押し付
け、チャック型片7a〜7dの両面に形成されている断面Ω
状の半型12にそれぞれ圧接する。
From this state, as shown in FIG. 2 (c), the chuck mold pieces 7a to 7d are pressed against the tube 10 supported by the cored bar 11, and the tube 10 is pressed in the axial direction from one or both ends. Sectional Ω formed on both sides of mold pieces 7a to 7d
Each of the half-shaped molds 12 is pressed.

この圧接によって、谷部9aを挾む管体10の対向面には
Ω状ビードの半分がそれぞれ形成される。
By this pressure contact, half of the Ω-shaped bead is formed on the opposing surface of the tube body 10 sandwiching the valley 9a.

次いで、チャック型片7aを第2図(c)に矢印Y1で示
す半径方向に移動させると、変形していた可撓性ゴム材
8aが原形に復帰し、チャック型片7aは谷部9aから抜け出
る。同時に、他のチャック型片7b〜7dも全く同様にし
て、チャック型片7aと同期しながら谷部9aから脱離させ
る。
Then, moving the chuck-type piece 7a in the radial direction indicated by the arrow Y 1 in FIG. 2 (c), a flexible rubber material which has been deformed
8a returns to its original shape, and the chuck mold piece 7a comes out of the valley 9a. At the same time, the other chuck mold pieces 7b to 7d are completely removed from the valley 9a in synchronization with the chuck mold piece 7a.

この状態で管体10を軸心方向に1ピッチ移動させ、第
2図(a)〜(c)と同様の工程を繰り返して半分Ω状
に形成された膨出ビード9を完全なΩ状ビードに形成す
る。
In this state, the pipe body 10 is moved by one pitch in the axial direction, and the same process as that shown in FIGS. 2A to 2C is repeated to form the half Ω-shaped expanded bead 9 into a complete Ω-shaped bead. Formed.

同様に管体10を1ピッチずつ軸心方向に移動しなが
ら、管体10に連続的にΩ状ビードを形成してΩ形蛇腹管
が製造される。
Similarly, an Ω-shaped bead is continuously formed on the tube 10 while moving the tube 10 in the axial direction by one pitch, thereby producing an Ω-shaped bellows tube.

管体10の軸心6の廻りに分割され、端部に可撓性ゴム
材8a〜8dが取り付けられたチャック型片7a〜7dを軸心6
に近付け或いは軸心6から遠ざかるように移動させて、
次々と管体10の外周にΩ状ビードが形成され、製造の過
程でチャック型片7a〜7dがΩ状ビードと干渉して管体10
が傷付けられたり変形したりすることがない。
The chuck mold pieces 7a to 7d, which are divided around the axis 6 of the tube 10 and have flexible rubber members 8a to 8d
, Or move away from the axis 6,
Ω-shaped beads are successively formed on the outer periphery of the tube 10, and during the manufacturing process, the chuck mold pieces 7a to 7d interfere with the Ω-shaped beads and
Is not damaged or deformed.

また、可撓性ゴム材8a〜8dの厚さを変更して、Ω状ビ
ードの形状を簡単に調整することが出来る。さらに、所
望の膨出ビード9の範囲をΩ状ビードに形成することが
出来るので、膨出ビード(山形)とΩ状ビードとを管体
10に組み合せて形成し、管体10の固有振動数の調整が可
能となる。
Further, the thickness of the flexible rubber members 8a to 8d can be changed to easily adjust the shape of the Ω-shaped bead. Furthermore, since the range of the desired bulging bead 9 can be formed into an Ω-shaped bead, the bulging bead (angle-shaped) and the Ω-shaped bead are connected to the tube
It is possible to adjust the natural frequency of the tube body 10 by forming it in combination with the tube body 10.

このようにして、実施例によると、可撓性に富み高耐
振強度のΩ形蛇腹管を工程中で傷付けや変形を生じるこ
となく製造することが出来る。
In this way, according to the embodiment, an Ω-shaped bellows tube having high flexibility and high vibration resistance can be manufactured without being damaged or deformed in the process.

(発明の効果) 以上詳細に説明したように、本発明によると製造過程
で傷付けや変形を生じることなく、可撓性に富み高耐振
性のΩ形蛇腹管が生産性よく製造される。
(Effects of the Invention) As described above in detail, according to the present invention, an Ω-shaped bellows tube having high flexibility and high vibration resistance can be manufactured with high productivity without causing any damage or deformation in the manufacturing process.

【図面の簡単な説明】[Brief description of the drawings]

第1図は、本発明の実施例に使用するチャック型片の説
明図、第2図(a)〜(c)は、本発明の実施例の各工
程の説明図、第3図(a)〜(c)は、従来のΩ形ビー
ディング加工の説明図である。 1……膨出部、2……管体、3,4……押型、6……軸
心、7a〜7d……チャック型片、8a〜8d……可撓性ゴム
材、9……膨出ビード、9a……谷部、10……管体、11…
…芯金、12……半型。
FIG. 1 is an explanatory view of a chuck mold piece used in an embodiment of the present invention, FIGS. 2 (a) to 2 (c) are explanatory views of each step of the embodiment of the present invention, and FIG. 3 (a). (C) is an explanatory view of a conventional Ω-type beading process. 1 ... bulging part, 2 ... tube, 3,4 ... pressing die, 6 ... shaft center, 7a-7d ... chuck type piece, 8a-8d ... flexible rubber material, 9 ... bulging Outgoing bead, 9a ... Tanibe, 10 ... Tube, 11 ...
… Core bar, 12 …… half mold.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】管の外周に所定高さの膨出ビードを形成
し、先端に可撓性ゴム材が取り付けられ、前記管の軸心
の廻りに複数個に分割されたチャック型片を、前記膨出
ビードの谷部に挿入すると共に、該谷部の底部を管内よ
り支持し、前記複数のチャック型片を前記軸心の廻りに
合体させることにより、前記可撓性ゴム材と合体された
前記チャック型片とで前記管をΩ状に膨出させ、その後
前記チャック型片を前記軸心の半径方向に引き抜くこと
により、前記管からΩ状ビードを有するΩ形蛇腹管を製
造することを特徴とするΩ形蛇腹管の製造法。
1. A swelling bead of a predetermined height is formed on the outer periphery of a tube, a flexible rubber material is attached to the tip, and a plurality of chuck dies are divided around the axis of the tube. While being inserted into the valley of the bulging bead, the bottom of the valley is supported from inside the pipe, and the plurality of chuck mold pieces are united around the axis to be united with the flexible rubber material. Producing a Ω-shaped bellows tube having an Ω-shaped bead from the tube by expanding the tube in an Ω shape with the chuck mold piece and then withdrawing the chuck mold piece in the radial direction of the axis. A method for producing an Ω-shaped bellows tube characterized by the following.
JP27551989A 1989-10-23 1989-10-23 Manufacturing method of Ω-shaped bellows tube Expired - Fee Related JP2732310B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27551989A JP2732310B2 (en) 1989-10-23 1989-10-23 Manufacturing method of Ω-shaped bellows tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27551989A JP2732310B2 (en) 1989-10-23 1989-10-23 Manufacturing method of Ω-shaped bellows tube

Publications (2)

Publication Number Publication Date
JPH03138024A JPH03138024A (en) 1991-06-12
JP2732310B2 true JP2732310B2 (en) 1998-03-30

Family

ID=17556598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27551989A Expired - Fee Related JP2732310B2 (en) 1989-10-23 1989-10-23 Manufacturing method of Ω-shaped bellows tube

Country Status (1)

Country Link
JP (1) JP2732310B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5711177A (en) * 1996-06-27 1998-01-27 Toyota Jidosha Kabushiki Kaisha Method for corrugating a metallic pipe
CN104139112A (en) * 2014-08-22 2014-11-12 南车戚墅堰机车有限公司 Omega-shaped ring molding die
CN110523833B (en) * 2019-07-18 2020-12-01 燕山大学 One-way extension compensation Y-shaped corrugated pipe, forming device and forming method

Also Published As

Publication number Publication date
JPH03138024A (en) 1991-06-12

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