JPH01299715A - Bending method for tube - Google Patents
Bending method for tubeInfo
- Publication number
- JPH01299715A JPH01299715A JP13071288A JP13071288A JPH01299715A JP H01299715 A JPH01299715 A JP H01299715A JP 13071288 A JP13071288 A JP 13071288A JP 13071288 A JP13071288 A JP 13071288A JP H01299715 A JPH01299715 A JP H01299715A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- cylindrical body
- tube
- bending
- magnet
- 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
- 238000005452 bending Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 239000006185 dispersion Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical group N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 abstract 1
- 239000011247 coating layer Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、パイプ曲げ加工法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a pipe bending method.
従来は、弾性線材を螺旋巻きして形成した筒状体を、被
加工用パイプの曲げ予定箇所に外嵌させた後、筒状体を
パイプ曲げ応力の分散部材としてパイプを曲げ加工して
いた。Conventionally, a cylindrical body formed by spirally winding an elastic wire was fitted onto the intended bending area of the pipe to be processed, and then the pipe was bent using the cylindrical body as a dispersion member for pipe bending stress. .
しかし、特にパイプの外周部に高発泡樹脂等の軟質の被
覆層を形成しであるパイプを、曲げ加工する場合等には
、パイプ曲げ時に筒状体と被覆層とが摩擦して被覆層が
破損したり、被覆層に加わった曲げ応力によって、被覆
層が圧潰したりする欠点があった。However, especially when bending a pipe that has a soft coating layer such as highly foamed resin formed on the outer circumference of the pipe, the cylindrical body and the coating layer will rub against each other when bending the pipe, causing the coating layer to deteriorate. There is a drawback that the coating layer may be damaged or crushed by bending stress applied to the coating layer.
本発明の目的は、パイプの外周部が軟質であっても、そ
の外周部を損傷させずに曲げ加工する点にある。An object of the present invention is to bend a pipe without damaging the outer circumference even if the outer circumference is soft.
本発明のパイプ曲げ方法の特徴手段は、弾性線材を螺旋
巻きして形成した筒状体に、磁石を予め取付けておき、
前記筒状体をパイプ内に挿入しながら磁気検出によって
前記パイプの長手方向における前記磁石の位置を判別し
て、前記パイプにおける曲げ予定箇所に前記筒状体を配
置し、前記筒状体をパイプ曲げ応力の分散部材として前
記パイプを曲げ加工することにあり、その作用・効果は
次の通りである。The characteristic means of the pipe bending method of the present invention is that a magnet is attached in advance to a cylindrical body formed by spirally winding an elastic wire.
While inserting the cylindrical body into the pipe, the position of the magnet in the longitudinal direction of the pipe is determined by magnetic detection, and the cylindrical body is placed at a planned bending point in the pipe, and the cylindrical body is inserted into the pipe. The purpose of this invention is to bend the pipe as a bending stress dispersion member, and its functions and effects are as follows.
つまり、弾性線材を螺旋巻きして形成した筒状体を、パ
イプ内の曲げ予定箇所に挿入してパイプを曲げ加工する
ことによって、パイプの内面側からパイプ曲げ応力を筒
状体が分散して、そのために、折れ曲がることなくしか
もパイプ断面形状を大きく変形させずにパイプ全体を弯
曲形状に曲げることができ、その結果、パイプの外周部
は、筒状体と接触しない。In other words, by inserting a cylindrical body formed by spirally winding an elastic wire into the intended bending point in the pipe and bending the pipe, the cylindrical body disperses the pipe bending stress from the inner surface of the pipe. Therefore, the entire pipe can be bent into a curved shape without bending or significantly deforming the cross-sectional shape of the pipe, and as a result, the outer circumference of the pipe does not come into contact with the cylindrical body.
その上、筒状体がパイプ内にあっても、筒状体に予め取
付けた磁石の位置を判別することによって、パイプにお
ける曲げ予定箇所に筒状体を正確に位置させることがで
きる。Moreover, even if the cylindrical body is inside the pipe, the cylindrical body can be accurately positioned at the planned bending point in the pipe by determining the position of the magnet attached to the cylindrical body in advance.
従って、筒状体をパイプにおける曲げ予定箇所に正確に
しかも効率良く位置させながら、パイプ外周部がたとえ
軟質材から成るものであっても、曲げ加工時に、パイプ
外周部を破損したり圧潰したりすることなく、パイプ曲
げ加工に伴う曲げ応力を均等に分散させて、パイプを局
部的に折れ曲げたり、その断面形状を大きく変形させた
りすることなく円滑な弯曲形に曲げ加工できるようにな
った。Therefore, while accurately and efficiently positioning the cylindrical body at the planned bending point on the pipe, even if the outer circumference of the pipe is made of soft material, the outer circumference of the pipe cannot be damaged or crushed during the bending process. By evenly distributing the bending stress associated with pipe bending, it is now possible to bend the pipe into a smooth curved shape without locally bending it or significantly deforming its cross-sectional shape. .
次に、本発明の実施例を、図面に基づいて説明する。 Next, embodiments of the present invention will be described based on the drawings.
第１図乃至第３図に示すように、軟質鋼管（３Ａ）の外
周面を、軟質合成樹脂を高発泡させて形成した断熱用被
覆層（３Ｂ）で覆わせである空調用配管等の軟質パイプ
（３）を曲げ加工するに、金属製の弾性線材（１）を間
隔をあけずに螺旋巻きして形成した筒状体（２）の先端
部（２Ａ）に、磁石（４）を予め取付けておき、筒状体
（２）をパイプ（３）内に挿入しながら（第１図）、パ
イプ（３）外方から磁気検出具（５）による検出によっ
てパイプ（３）の長手方向における磁石（４）の位置を
判別して、パイプ（３） における曲げ予定箇所に筒状
体（２）を配置した後（第２図）、筒状体（２）をパイ
プ曲げ応力に対する分散部材として、パイプ（３）の曲
げ加工位置の両側を、夫々手で把持してパイプ（３）を
弯曲状に曲げ（第３図）、パイプ（３）の曲げ加工後は
、パイプク３）曲げ加工部の断面形状が多少変形して、
筒状体（２）の外周部を、パイプ（３）が挟圧していた
としても、筒状体（２）を、その軸芯（Ｐ）周りで縮径
する方向に回動させながらパイプ（３）から抜き取る。As shown in Figures 1 to 3, the outer peripheral surface of a soft steel pipe (3A) is covered with a heat insulating coating layer (3B) formed by highly foaming a soft synthetic resin. To bend the pipe (3), a magnet (4) is attached in advance to the tip (2A) of a cylindrical body (2) formed by spirally winding a metal elastic wire (1) without any gaps. While inserting the cylindrical body (2) into the pipe (3) (Fig. 1), the magnetic detector (5) detects the magnetic field in the longitudinal direction of the pipe (3) from outside the pipe (3). After determining the position of the magnet (4) and placing the cylindrical body (2) at the planned bending point in the pipe (3) (Fig. 2), the cylindrical body (2) is used as a dispersion member for pipe bending stress. , bend the pipe (3) into a curved shape by grasping both sides of the bending position of the pipe (3) with each hand (Fig. 3), and after bending the pipe (3), bend the pipe (3) at the bending part (3). The cross-sectional shape of is slightly deformed,
Even if the pipe (3) pinches the outer periphery of the cylindrical body (2), the pipe ( 3) Remove from.
前記先端部（２人）は、パイプ（３）内に挿入しやすい
ように、先端側はど小径の先細り形状に成形しである。The distal end portions (two) are formed into a tapered shape with a small diameter on the distal end side so that they can be easily inserted into the pipe (3).
本発明は、被覆層（３Ｂ）を設けていないパイプ（３）
を曲げる場合にも有効であり、また、パイプ（３）本体
の材質は鋼管以外にアルミ管であっても良く、非磁性管
であればより効果的であるが、軟質鉄管等のような磁性
管であっても、筒状体（２）に取付けた磁石（４）のパ
イプ（３）内における位置を、磁力の変化を検出するこ
とによって判別しても良い。The present invention provides a pipe (3) without a coating layer (3B).
Also, the material of the main body of the pipe (3) may be an aluminum pipe other than a steel pipe, and it is more effective if it is a non-magnetic pipe, but it is also effective when bending a magnetic pipe such as a soft iron pipe. Even in the case of a pipe, the position of the magnet (4) attached to the cylindrical body (2) within the pipe (3) may be determined by detecting changes in magnetic force.
前記磁石（４）は、筒状体（２）の先端部（２Ａ）に限
らず、筒状体（２）の長手方向における中間部に取付け
ても良い。The magnet (4) is not limited to the tip (2A) of the cylindrical body (2), but may be attached to an intermediate portion in the longitudinal direction of the cylindrical body (2).
図面は本発明に係るパイプ曲げ加工法の実施例を示し、
第１図、第２図、第３図は加工順を説明する作用説明図
である。
（１）・・・・・・弾性線材、（２）・・・・・・筒状
体、（３）・・・・・・パイプ、（４）・・・・・・磁
石、（Ｐ）・・・・・・軸芯。The drawings show an embodiment of the pipe bending method according to the present invention,
FIG. 1, FIG. 2, and FIG. 3 are operation explanatory diagrams for explaining the processing order. (1)...Elastic wire, (2)...Cylindrical body, (3)...Pipe, (4)...Magnet, (P)・・・・・・Axis core.
Claims (1)
）に、磁石（４）を予め取付けておき、前記筒状体（２
）をパイプ（３）内に挿入しながら磁気検出によって前
記パイプ（３）の長手方向における前記磁石（４）の位
置を判断して、前記パイプ（３）における曲げ予定箇所
に前記筒状体（２）を配置し、前記筒状体（２）をパイ
プ曲げ応力の分散部材として前記パイプ（３）を曲げ加
工するパイプ曲げ加工法。 ２、前記パイプ（３）の曲げ加工後には、前記筒状体（
２）をその軸芯（Ｐ）周りで縮径する方向に回動させな
がら前記パイプ（３）から抜き取る請求項１記載のパイ
プ曲げ加工法。[Claims] 1. A cylindrical body (2) formed by spirally winding an elastic wire (1).
), a magnet (4) is attached in advance to the cylindrical body (2).
) is inserted into the pipe (3), the position of the magnet (4) in the longitudinal direction of the pipe (3) is determined by magnetic detection, and the cylindrical body ( 2), and the pipe (3) is bent using the cylindrical body (2) as a pipe bending stress dispersion member. 2. After bending the pipe (3), the cylindrical body (
2) The pipe bending method according to claim 1, wherein the pipe (2) is removed from the pipe (3) while being rotated around its axis (P) in a direction to reduce its diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63130712A JP2516244B2 (en) | 1988-05-27 | 1988-05-27 | Pipe bending method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63130712A JP2516244B2 (en) | 1988-05-27 | 1988-05-27 | Pipe bending method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01299715A true JPH01299715A (en) | 1989-12-04 |
| JP2516244B2 JP2516244B2 (en) | 1996-07-24 |
Family
ID=15040819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63130712A Expired - Fee Related JP2516244B2 (en) | 1988-05-27 | 1988-05-27 | Pipe bending method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2516244B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769451A (en) * | 2014-02-25 | 2014-05-07 | 武汉理工大学 | Minor radius bend forming method of ultrathin tubular product |
| CN106391794A (en) * | 2016-11-25 | 2017-02-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Small-curvature-radius forming method for conduit |
-
1988
- 1988-05-27 JP JP63130712A patent/JP2516244B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769451A (en) * | 2014-02-25 | 2014-05-07 | 武汉理工大学 | Minor radius bend forming method of ultrathin tubular product |
| CN106391794A (en) * | 2016-11-25 | 2017-02-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Small-curvature-radius forming method for conduit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2516244B2 (en) | 1996-07-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |