JP2001293521A - Bending apparatus of tube - Google Patents

Bending apparatus of tube

Info

Publication number
JP2001293521A
JP2001293521A JP2000111803A JP2000111803A JP2001293521A JP 2001293521 A JP2001293521 A JP 2001293521A JP 2000111803 A JP2000111803 A JP 2000111803A JP 2000111803 A JP2000111803 A JP 2000111803A JP 2001293521 A JP2001293521 A JP 2001293521A
Authority
JP
Japan
Prior art keywords
bending
tube
roll
pipe
heating
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.)
Withdrawn
Application number
JP2000111803A
Other languages
Japanese (ja)
Inventor
Tetsuya Ito
哲也 伊藤
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.)
Mitsubishi Power Ltd
Original Assignee
Babcock Hitachi KK
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 Babcock Hitachi KK filed Critical Babcock Hitachi KK
Priority to JP2000111803A priority Critical patent/JP2001293521A/en
Publication of JP2001293521A publication Critical patent/JP2001293521A/en
Withdrawn legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a roll type apparatus to produce a bent tube having a high precision. SOLUTION: In a tube bending apparatus provided with a heating coil 2 to heat an outer periphery of a tube 1, a cooler 3 to cool the tube 1, a pusher 8 to apply a pressure in the axial direction of the tube 1, a bending roll 11 to apply a bending moment to the tube 1 and a slide mechanism 13 of the bending roll 11, a tube bending precision is improved by changing the distance between the bending roll and a heater. A position, where the bending roll 11 is pressed to the tube 1, is moved apart from the heating coil 2, the effect, that an error of a positional error of the bending roll 11 exerts on a bending angle of the tube 1, is reduced, a bent tube having a good bending precision is manufactured.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は曲げ型を用いない管
の曲げ加工装置に関する。
The present invention relates to a pipe bending apparatus which does not use a bending die.

【0002】[0002]

【従来の技術】管の曲げ加工法には、プレス曲げ、引き
曲げ、ロール曲げ、高周波誘導加熱曲げなどがある。プ
レス曲げ、引き曲げは曲げ半径ごとに曲げ型が必要であ
るため、連続して異なる曲げ半径を曲げることが困難で
ある。一方、ロール曲げ、高周波誘導加熱曲げは、曲げ
半径ごとに曲げ型を必要とせず、連続して異なる曲げ半
径のものに曲げることが容易にできる。ロール曲げは三
次元形状の曲げが困難であるが、高周波誘導加熱曲げで
は容易に行うことができ、曲げ精度もロール曲げよりよ
い。
2. Description of the Related Art Pipe bending methods include press bending, pull bending, roll bending, and high-frequency induction heating bending. Since press bending and pull bending require a bending mold for each bending radius, it is difficult to continuously bend at different bending radii. On the other hand, the roll bending and the high-frequency induction heating bending do not require a bending die for each bending radius, and can be easily bent to continuously have different bending radii. Although it is difficult to bend three-dimensionally by roll bending, it can be easily performed by high-frequency induction heating bending, and the bending accuracy is better than roll bending.

【0003】このように、高周波誘導加熱曲げは曲げ形
状に対して柔軟性がある曲げ加工法である。しかし曲げ
速度が遅いという欠点も有しており、特に多品種少量生
産に適している。高周波誘導加熱曲げ方法にはアーム方
式とロール方式があり、この例を以下に説明する。
[0003] As described above, high-frequency induction heating bending is a bending method having flexibility with respect to a bending shape. However, it has a disadvantage that the bending speed is low, and is particularly suitable for high-mix low-volume production. The high-frequency induction heating bending method includes an arm method and a roll method, examples of which will be described below.

【0004】図2(a)はアーム方式装置の概略図で、
加工される管1、管1を高周波誘導加熱するリング状の
加熱コイル2、管1の加熱部近傍に水を噴射し、加熱さ
れた管を冷却するリング状の冷却器3、管1を支持する
ガイドロール4、ピボット7を中心に回転するアーム
5、アーム5上の任意の位置に固定できる管1をつかむ
クランプ6、管1に圧力を加えるプッシャ8、プッシャ
8と一体となった管1をつかむチャック9などから構成
される。
FIG. 2A is a schematic view of an arm type device.
The tube 1 to be processed, a ring-shaped heating coil 2 for high-frequency induction heating of the tube 1, a ring-shaped cooler 3 for spraying water near a heating portion of the tube 1 to cool the heated tube, and support the tube 1. Guide roll 4, an arm 5 rotating about a pivot 7, a clamp 6 for gripping a tube 1 that can be fixed at an arbitrary position on the arm 5, a pusher 8 for applying pressure to the tube 1, and a tube 1 integrated with the pusher 8 It is composed of a chuck 9 and the like for gripping.

【0005】次に高周波誘導加熱曲げ方法によるアーム
方式装置の動作の説明をする。まず図2(a)のように
管1をガイドロール4、リング状の加熱コイル2、冷却
器3に通し、管1の前側をクランプ6で、後側をチャッ
ク9でつかむ。次に加熱コイル2により管1を高周波誘
導加熱する。加熱領域を狭くするために加熱部近傍を冷
却器3により冷却する。冷却は通常、水または空気を管
1に噴射する方法をとる。図2(c)は加熱部分を管1
の軸を基準に半分だけ示した図である。管1はプッシャ
8によって矢印の方向へ押し出される。この間に管1は
加熱コイル2によって加熱される。ハッチング部bの範
囲は加熱された領域を示す。範囲aはまだ加熱されてい
ない範囲である。冷却器3から加熱された管1に向かっ
て冷却水10を噴射すると範囲cは冷却された範囲であ
る。このようにして管1の狭い部分のみを高温に加熱
し、強度を落とすようにしている。ある特定の温度まで
管1を加熱したら、プッシャ8によって管1の軸方向に
圧力を加える。管1はアーム5のクランプ6によりクラ
ンプされているため、ピボット7を中心とした円弧の方
向に動こうとする。このため、管1に曲げモーメントが
加わり、管1の加熱されて強度が落ちた狭い領域のみが
変形する。管1を一定の温度に加熱しつつ、これらの作
用が連続して行われることによって図2(b)のような
曲げができる。
Next, the operation of the arm type apparatus using the high-frequency induction heating bending method will be described. First, as shown in FIG. 2A, the tube 1 is passed through the guide roll 4, the ring-shaped heating coil 2, and the cooler 3, and the front side of the tube 1 is gripped by the clamp 6 and the rear side thereof is gripped by the chuck 9. Next, the tube 1 is subjected to high-frequency induction heating by the heating coil 2. In order to narrow the heating area, the vicinity of the heating section is cooled by the cooler 3. The cooling is usually performed by injecting water or air into the tube 1. FIG. 2 (c) shows the heating portion of tube 1.
FIG. 6 is a diagram showing only half of the axis with respect to the axis. The tube 1 is pushed out by a pusher 8 in the direction of the arrow. During this time, the tube 1 is heated by the heating coil 2. The range of the hatched portion b indicates a heated region. The range a is a range that has not been heated yet. When the cooling water 10 is injected from the cooler 3 toward the heated pipe 1, a range c is a cooled range. In this way, only the narrow portion of the tube 1 is heated to a high temperature to reduce the strength. When the tube 1 is heated to a certain temperature, a pressure is applied by the pusher 8 in the axial direction of the tube 1. Since the tube 1 is clamped by the clamp 6 of the arm 5, the tube 1 tends to move in the direction of an arc around the pivot 7. For this reason, a bending moment is applied to the tube 1, and only the narrow region of the tube 1 where the strength is reduced by heating is deformed. These operations are performed continuously while the tube 1 is heated to a constant temperature, whereby the bending as shown in FIG. 2B can be performed.

【0006】管1の曲げ半径を変更するときは、クラン
プ6の回転半径を変える。つまり管1とアーム5のピボ
ット7の距離を変更し、クランプ6もそれに応じたアー
ム5上の位置に固定し、同様にして曲げを行う。図3
(a)、図3(b)には図2(a)、図2(b)の場合
より曲げ半径を小さくした場合の高周波誘導加熱曲げ方
法によるアーム方式装置の動作を示す。図3に示すアー
ム方式装置の動作はクランプ6の回転半径が小さいだけ
で、図2に示すアーム方式装置の動作と同様であるの
で、その説明は省略する。
When changing the bending radius of the tube 1, the turning radius of the clamp 6 is changed. That is, the distance between the pipe 1 and the pivot 7 of the arm 5 is changed, and the clamp 6 is also fixed to a position on the arm 5 corresponding thereto, and bending is performed in the same manner. FIG.
(A) and FIG. 3 (b) show the operation of the arm type device by the high-frequency induction heating bending method when the bending radius is smaller than in the case of FIGS. 2 (a) and 2 (b). The operation of the arm type apparatus shown in FIG. 3 is the same as the operation of the arm type apparatus shown in FIG. 2 except that the radius of rotation of the clamp 6 is small, and a description thereof will be omitted.

【0007】図4はロール方式装置を簡略化した図で、
構成部品はアーム方式の装置とほとんど同じであるが、
管1に曲げモーメントを加える部品として、図2のアー
ム5とクランプ6の代わりに曲げロール11を用いる。
FIG. 4 is a simplified view of a roll type device.
The components are almost the same as the arm type device,
As a part for applying a bending moment to the tube 1, a bending roll 11 is used instead of the arm 5 and the clamp 6 in FIG.

【0008】図4のロール方式装置の動作の説明をす
る。ロール方式装置はアーム方式の装置と同様に、管1
を加熱コイル2と冷却器3で加熱と冷却をしながらプッ
シャ8で圧力を加える。ここで図4(b)のように曲げ
ロール11で管1を押し、曲げモーメントを加え、曲げ
管を形成する。曲げロール11の押し込み量で管1の曲
げ半径を変えることができる。図4(c)は、図4
(b)の場合より曲げ半径を小さくした場合を示す図で
あり、図4(b)の場合より曲げロール11の押し込み
量が大きい。
The operation of the roll type apparatus shown in FIG. 4 will be described. The roll-type device is the same as the arm-type device,
Is heated and cooled by the heating coil 2 and the cooler 3, and pressure is applied by the pusher 8. Here, as shown in FIG. 4B, the pipe 1 is pressed by the bending roll 11 and a bending moment is applied to form a bent pipe. The bending radius of the tube 1 can be changed by the pushing amount of the bending roll 11. FIG.
FIG. 5B is a diagram showing a case where the bending radius is smaller than that of the case of FIG. 4B, and the pushing amount of the bending roll 11 is larger than that of the case of FIG.

【0009】[0009]

【発明が解決しようとする課題】高周波誘導加熱により
管1の曲げを行う装置のうちで、アーム方式の装置は図
2に示すようにプッシャ8で管1に曲げ加工力を加え、
被加熱部に曲げ変形を生じさせる。しかし、プッシャ8
の加工力で変形するのは被加熱部だけではない。プッシ
ャ8による加工力は、加熱により変形抵抗が大きく下が
った被加熱部を塑性変形させるために必要な大きさしか
かけないが、図5に示すようにこの力で曲げ加工が終わ
った部分(曲げ部12)が点線のように弾性変形する。
この傾向は、管1の曲げ角度が大きくなるほど、また曲
げる管1の径に対して曲げ半径が大きいほど強くなる。
このようにしてできあがった曲げ管は、目的とする曲げ
半径より大きく、また不均一な円弧形状になるという問
題があった。
Among the devices for bending the tube 1 by high-frequency induction heating, an arm-type device applies a bending force to the tube 1 with a pusher 8 as shown in FIG.
Bending deformation is caused in the heated portion. However, pusher 8
It is not only the portion to be heated that is deformed by the processing force. The processing force by the pusher 8 is only large enough to plastically deform the heated part, whose deformation resistance has been greatly reduced by heating, but as shown in FIG. The portion 12) is elastically deformed as indicated by the dotted line.
This tendency becomes stronger as the bending angle of the tube 1 increases and as the bending radius increases with respect to the diameter of the tube 1 to be bent.
The bent tube thus completed has a problem that it is larger than a desired bending radius and has an uneven arc shape.

【0010】一方、ロール方式の装置は、被加熱部近傍
に力をかけるので弾性変形がほとんど起きない。そのた
め曲げ角度が大きく、曲げる管1の径に対して曲げ半径
が大きい場合でも、アーム方式の装置に比べて円弧形状
がよい。しかし、管1の曲げ管精度は、押しつける曲げ
ロールの位置精度によって決まるが、この押しつけ位置
精度を出すことが難しいという問題があった。
[0010] On the other hand, the roll-type device hardly undergoes elastic deformation because a force is applied to the vicinity of the heated portion. Therefore, even when the bending angle is large and the bending radius is large relative to the diameter of the pipe 1 to be bent, the arc shape is better than that of the arm type device. However, the bending pipe accuracy of the pipe 1 is determined by the positional accuracy of the bending roll to be pressed, but there is a problem that it is difficult to obtain the pressing positional accuracy.

【0011】本発明の課題は、曲げ精度の良い曲げ管を
作るロール方式の装置を提供することである。
An object of the present invention is to provide a roll-type apparatus for producing a bent tube with good bending accuracy.

【0012】[0012]

【課題を解決するための手段】本発明の上記課題は、管
の外周を加熱する加熱器と管を冷却する冷却器と管の軸
方向に圧力を加えるプッシャと管に曲げモーメントを加
える曲げロールと曲げロールのスライド機構を設けた管
の曲げ加工装置により解決される。
SUMMARY OF THE INVENTION The object of the present invention is to provide a heater for heating the outer periphery of a tube, a cooler for cooling the tube, a pusher for applying pressure in the axial direction of the tube, and a bending roll for applying a bending moment to the tube. And a pipe bending device provided with a bending roll slide mechanism.

【0013】[0013]

【作用】本発明の管の曲げ加工装置の曲げロールを押し
つける位置を加熱コイルより遠ざけることにより、曲げ
ロール位置の誤差が管の曲げ角度に及ぼす影響が小さく
なり、精度の良い曲げ管を作ることができる。
By making the position of pressing the bending roll of the pipe bending apparatus of the present invention farther from the heating coil, the influence of the error of the bending roll position on the bending angle of the pipe is reduced, and the bending pipe with high precision can be manufactured. Can be.

【0014】[0014]

【発明の実施の形態】本発明の実施の形態のロール方式
の高周波加熱により管の曲げを行う装置の全体構成を図
1に示す。基本的な構成は図4に示すロール方式の高周
波加熱装置と同じであるが、図4に示すロール方式の高
周波加熱装置と異なるところは図1(a)のように曲げ
ロールのスライド機構13を設けてあることである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an overall configuration of an apparatus for bending a pipe by high frequency heating of a roll type according to an embodiment of the present invention. The basic structure is the same as that of the roll-type high-frequency heating device shown in FIG. 4, but the difference from the roll-type high-frequency heating device shown in FIG. 4 is that the slide mechanism 13 of the bending roll is provided as shown in FIG. It is provided.

【0015】図1の管の曲げを行う装置は加工される管
1、管1を高周波誘導加熱するリング状の加熱コイル
2、管1の加熱部近傍に水を噴射し、加熱された管を冷
却するリング状の冷却器3、管1を支持する一対のガイ
ドロール4、管1に圧力を加えるプッシャ8、プッシャ
8と一体となった管1をつかむチャック9、管1に曲げ
モーメントを加える曲げロール11と曲げロール11の
スライド機構13を備えている。
The apparatus for bending a pipe shown in FIG. 1 comprises a pipe 1 to be machined, a ring-shaped heating coil 2 for high-frequency induction heating of the pipe 1, and water jetted near a heating portion of the pipe 1 so that the heated pipe is heated. A ring-shaped cooler 3 for cooling, a pair of guide rolls 4 supporting the pipe 1, a pusher 8 for applying pressure to the pipe 1, a chuck 9 for gripping the pipe 1 integrated with the pusher 8, and a bending moment to the pipe 1. A bending roll 11 and a slide mechanism 13 for the bending roll 11 are provided.

【0016】図1(a)はロール方式の高周波加熱装置
に管1をセットした状態で、曲げロール11は加熱コイ
ル2に近い通常の位置にある。この状態で管1を曲げれ
ば、通常のロール曲げとなる。本発明の装置では曲げロ
ール11のスライド機構13により図1(b)のように
曲げロール11を加熱コイル2より離して固定する。こ
の状態で通常の曲げと同様に図1(c)のように管1の
高周波加熱による曲げを行う。このように加熱コイル2
付近の管1が曲がる点より離れた点を曲げロール11で
押すことにより、管1が曲がる点から近い点を曲げロー
ル11で押す場合よりも曲げロール11の押し込み位置
誤差が管1の曲げ精度に与える影響が小さくなり、精度
良く管1を曲げることができる。
FIG. 1A shows a state in which the tube 1 is set in a roll-type high-frequency heating device, and the bending roll 11 is at a normal position close to the heating coil 2. If the pipe 1 is bent in this state, normal roll bending is performed. In the apparatus of the present invention, the bending roll 11 is fixed away from the heating coil 2 by the slide mechanism 13 of the bending roll 11 as shown in FIG. In this state, the tube 1 is bent by high-frequency heating as shown in FIG. Thus, the heating coil 2
By pushing a point farther from the bending point of the nearby pipe 1 with the bending roll 11, the pushing position error of the bending roll 11 is more accurate than the bending accuracy of the pipe 1 as compared with a case where a point closer to the bending point of the pipe 1 is pushed with the bending roll 11. And the pipe 1 can be bent with high accuracy.

【0017】本発明の実施の形態では、図1(c)のよ
うに、加熱コイル2から曲げロール11側に管1を従来
の方法より長く出さなくてはならない。管1を長く出せ
ない場合や、曲げ半径が小さい場合は、図1(b)のよ
うに加熱コイル2から曲げロール11が離せないので、
図1(a)のように加熱コイル2に近づけて曲げればよ
い。
In the embodiment of the present invention, as shown in FIG. 1C, the tube 1 must be extended from the heating coil 2 to the bending roll 11 side longer than in the conventional method. When the pipe 1 cannot be extended or the bending radius is small, the bending roll 11 cannot be separated from the heating coil 2 as shown in FIG.
As shown in FIG. 1A, it may be bent close to the heating coil 2.

【0018】[0018]

【発明の効果】本発明によれば、高周波誘導加熱曲げの
ロール方式により、管を精度良く曲げることができる。
According to the present invention, the tube can be bent with high precision by the roll method of high-frequency induction heating bending.

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

【図1】 本発明の実施の形態の高周波誘導加熱曲げの
ロール方式の装置の概略図を示す。
FIG. 1 is a schematic view of a roll-type apparatus for high-frequency induction heating bending according to an embodiment of the present invention.

【図2】 図2(a)および図2(b)は従来の高周波
誘導加熱曲げのアーム方式の装置の概略図であり、大き
な曲げ半径に曲げている状態を示し、図2(c)は加熱
部分を管の軸を基準に半分だけ示した図を示す。
FIGS. 2 (a) and 2 (b) are schematic views of a conventional high-frequency induction heating bending arm type device, showing a state where the device is bent to a large bending radius, and FIG. FIG. 3 shows a diagram in which the heating part is shown only half with respect to the axis of the tube.

【図3】 従来の高周波誘導加熱曲げのアーム方式の装
置の概略図であり、小さな曲げ半径に曲げている状態を
示す。
FIG. 3 is a schematic view of a conventional high-frequency induction heating bending arm type apparatus, showing a state where the apparatus is bent to a small bending radius.

【図4】 図4(a)は従来の高周波誘導加熱曲げのロ
ール方式の装置の概略図を示し、図4(b)は曲げモー
メントを加えて曲げ管を形成した状態を示し、図4
(c)は図4(b)より曲げ半径を小さくした図を示
す。
FIG. 4A is a schematic view of a conventional roll-type apparatus for high-frequency induction heating bending, and FIG. 4B shows a state in which a bending moment is applied to form a bent tube;
(C) shows a diagram in which the bending radius is smaller than in FIG. 4 (b).

【図5】 従来のアーム方式の問題点を表している。FIG. 5 shows a problem of the conventional arm system.

【符号の説明】[Explanation of symbols]

1 管 2 加熱コイル 3 冷却器 4 ガイドロール 5 アーム 6 クランプ 7 ピボット(回転軸) 8 プッシャ 9 チャック 10 冷却水 11 曲げロール 12 曲げ部 13 スライド機構 Reference Signs List 1 tube 2 heating coil 3 cooler 4 guide roll 5 arm 6 clamp 7 pivot (rotating shaft) 8 pusher 9 chuck 10 cooling water 11 bending roll 12 bending portion 13 slide mechanism

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 管の外周を加熱する加熱器と、管を冷却
する冷却器と、管の軸方向に圧力を加えるプッシャと、
管に曲げモーメントを加える曲げロールを供えた曲げ加
工装置において、 曲げロールと加熱器の間の距離を変化させるための曲げ
ロールのスライド機構を設けたことを特徴とする管の曲
げ加工装置。
A heater for heating the outer periphery of the tube, a cooler for cooling the tube, a pusher for applying pressure in the axial direction of the tube,
A bending apparatus having a bending roll for applying a bending moment to a pipe, wherein a bending mechanism for sliding a bending roll for changing a distance between the bending roll and a heater is provided.
JP2000111803A 2000-04-13 2000-04-13 Bending apparatus of tube Withdrawn JP2001293521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000111803A JP2001293521A (en) 2000-04-13 2000-04-13 Bending apparatus of tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000111803A JP2001293521A (en) 2000-04-13 2000-04-13 Bending apparatus of tube

Publications (1)

Publication Number Publication Date
JP2001293521A true JP2001293521A (en) 2001-10-23

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Cited By (11)

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Publication number Priority date Publication date Assignee Title
JP2006205215A (en) * 2005-01-28 2006-08-10 Asahi-Seiki Mfg Co Ltd Bending machine
JP2007083304A (en) * 2005-03-03 2007-04-05 Sumitomo Metal Ind Ltd Method for bending metallic material, bending apparatus, bending equipment train and bent product using the same
CN102886400A (en) * 2012-10-25 2013-01-23 盈都桥梁钢构工程有限公司 Hot work bending technology for spatial hyperbolic circular tube
KR101281941B1 (en) 2007-04-04 2013-07-03 스미토모 고칸 가부시키가이샤 Manufacturing method, manufacturing apparatus and continuous manufacturing apparatus for bent products
CN103934325A (en) * 2009-05-19 2014-07-23 新日铁住金株式会社 Bending apparatus
CN104325033A (en) * 2014-10-23 2015-02-04 海宁奥特排普汽车部件有限公司 Feeding trolley boosting device of pipe bending machine
CN104480279A (en) * 2014-11-13 2015-04-01 中国石油天然气集团公司 Two-step induction heater of bent tube for oil gas pipeline production, and method thereof
JP2015098060A (en) * 2008-10-28 2015-05-28 新日鐵住金株式会社 Manufacturing method and manufacturing apparatus for bent product
KR101573639B1 (en) 2014-11-17 2015-12-01 전상운 Apparatus for bending pipe
KR101644271B1 (en) * 2015-06-04 2016-08-02 경상대학교산학협력단 Bending core of high frequency pipe bending machine
CN109396227A (en) * 2018-12-18 2019-03-01 沧州隆泰迪管道科技有限公司 A kind of induction heating syphon manufacturing method

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006205215A (en) * 2005-01-28 2006-08-10 Asahi-Seiki Mfg Co Ltd Bending machine
JP4544524B2 (en) * 2005-01-28 2010-09-15 旭精機工業株式会社 Bending machine
JP2007083304A (en) * 2005-03-03 2007-04-05 Sumitomo Metal Ind Ltd Method for bending metallic material, bending apparatus, bending equipment train and bent product using the same
KR101281941B1 (en) 2007-04-04 2013-07-03 스미토모 고칸 가부시키가이샤 Manufacturing method, manufacturing apparatus and continuous manufacturing apparatus for bent products
US10016802B2 (en) 2008-10-28 2018-07-10 Nippon Steel & Sumitomo Metal Corporation Method and apparatus for manufacturing a bent product
JP2015098060A (en) * 2008-10-28 2015-05-28 新日鐵住金株式会社 Manufacturing method and manufacturing apparatus for bent product
US9821357B2 (en) 2008-10-28 2017-11-21 Nippon Steel & Sumitomo Metal Corporation Method and apparatus for manufacturing a bent product
CN103934325B (en) * 2009-05-19 2016-09-28 新日铁住金株式会社 Bender
CN103934325A (en) * 2009-05-19 2014-07-23 新日铁住金株式会社 Bending apparatus
CN102886400A (en) * 2012-10-25 2013-01-23 盈都桥梁钢构工程有限公司 Hot work bending technology for spatial hyperbolic circular tube
CN104325033A (en) * 2014-10-23 2015-02-04 海宁奥特排普汽车部件有限公司 Feeding trolley boosting device of pipe bending machine
CN104480279A (en) * 2014-11-13 2015-04-01 中国石油天然气集团公司 Two-step induction heater of bent tube for oil gas pipeline production, and method thereof
KR101573639B1 (en) 2014-11-17 2015-12-01 전상운 Apparatus for bending pipe
KR101644271B1 (en) * 2015-06-04 2016-08-02 경상대학교산학협력단 Bending core of high frequency pipe bending machine
CN109396227A (en) * 2018-12-18 2019-03-01 沧州隆泰迪管道科技有限公司 A kind of induction heating syphon manufacturing method

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